Mercurial > sdl-ios-xcode
annotate src/audio/SDL_audiocvt.c @ 5053:b5b42be9333c
Fixed bug #1026
Vittorio Giovara 2010-07-16 19:09:28 PDT
i was reading SDL_renderer_gles and i noticed that every time we there
is some gl call the gl state is modified with a couple of
glEnableClientState()/glDisableClientState.
While this is completely fine for desktops systems, this is a major
performace kill on mobile devices, right where opengles is
implemented.
Normal practice in this case is to update the glstate once, keep it
always the same and disable/enable other states only in very special
occasions.
On the web there's plenty of documentation (on the top of my head
http://developer.apple.com/iphone/library/documentation/3DDrawing/Conceptual/OpenGLES_ProgrammingGuide/Performance/Performance.html#//apple_ref/doc/uid/TP40008793-CH105-SW5
) and i personally tried this.
I modified my code and got a 10 fps boost, then modified SDL_render_gles and
shifted from 40 fps to 50 fps alone -- considering that i started from ~30fps i
got an 80% performance increase with this technique.
I have attached a dif of my changes, hope that it will be included in
mainstream.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Wed, 19 Jan 2011 23:56:16 -0800 |
parents | f7b03b6838cb |
children | b530ef003506 |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
3697 | 3 Copyright (C) 1997-2010 Sam Lantinga |
0 | 4 |
5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
0 | 9 |
10 This library is distributed in the hope that it will be useful, | |
11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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13 Lesser General Public License for more details. |
0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
0 | 18 |
19 Sam Lantinga | |
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20 slouken@libsdl.org |
0 | 21 */ |
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22 #include "SDL_config.h" |
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23 |
0 | 24 /* Functions for audio drivers to perform runtime conversion of audio format */ |
25 | |
26 #include "SDL_audio.h" | |
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27 #include "SDL_audio_c.h" |
0 | 28 |
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29 /* #define DEBUG_CONVERT */ |
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30 |
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31 /* !!! FIXME */ |
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32 #ifndef assert |
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33 #define assert(x) |
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34 #endif |
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35 |
0 | 36 /* Effectively mix right and left channels into a single channel */ |
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37 static void SDLCALL |
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38 SDL_ConvertMono(SDL_AudioCVT * cvt, SDL_AudioFormat format) |
0 | 39 { |
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40 int i; |
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41 Sint32 sample; |
0 | 42 |
43 #ifdef DEBUG_CONVERT | |
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44 fprintf(stderr, "Converting to mono\n"); |
0 | 45 #endif |
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46 switch (format & (SDL_AUDIO_MASK_SIGNED | SDL_AUDIO_MASK_BITSIZE)) { |
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47 case AUDIO_U8: |
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48 { |
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49 Uint8 *src, *dst; |
0 | 50 |
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51 src = cvt->buf; |
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52 dst = cvt->buf; |
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53 for (i = cvt->len_cvt / 2; i; --i) { |
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54 sample = src[0] + src[1]; |
2042 | 55 *dst = (Uint8) (sample / 2); |
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56 src += 2; |
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57 dst += 1; |
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58 } |
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59 } |
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60 break; |
0 | 61 |
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62 case AUDIO_S8: |
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63 { |
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64 Sint8 *src, *dst; |
0 | 65 |
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66 src = (Sint8 *) cvt->buf; |
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67 dst = (Sint8 *) cvt->buf; |
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68 for (i = cvt->len_cvt / 2; i; --i) { |
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69 sample = src[0] + src[1]; |
2042 | 70 *dst = (Sint8) (sample / 2); |
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71 src += 2; |
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72 dst += 1; |
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73 } |
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74 } |
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75 break; |
0 | 76 |
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77 case AUDIO_U16: |
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78 { |
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79 Uint8 *src, *dst; |
0 | 80 |
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81 src = cvt->buf; |
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82 dst = cvt->buf; |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
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changeset
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83 if (SDL_AUDIO_ISBIGENDIAN(format)) { |
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84 for (i = cvt->len_cvt / 4; i; --i) { |
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85 sample = (Uint16) ((src[0] << 8) | src[1]) + |
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86 (Uint16) ((src[2] << 8) | src[3]); |
2042 | 87 sample /= 2; |
88 dst[1] = (sample & 0xFF); | |
89 sample >>= 8; | |
90 dst[0] = (sample & 0xFF); | |
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91 src += 4; |
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92 dst += 2; |
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93 } |
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94 } else { |
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95 for (i = cvt->len_cvt / 4; i; --i) { |
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96 sample = (Uint16) ((src[1] << 8) | src[0]) + |
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97 (Uint16) ((src[3] << 8) | src[2]); |
2042 | 98 sample /= 2; |
99 dst[0] = (sample & 0xFF); | |
100 sample >>= 8; | |
101 dst[1] = (sample & 0xFF); | |
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102 src += 4; |
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103 dst += 2; |
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104 } |
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105 } |
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106 } |
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107 break; |
0 | 108 |
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109 case AUDIO_S16: |
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110 { |
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111 Uint8 *src, *dst; |
0 | 112 |
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113 src = cvt->buf; |
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114 dst = cvt->buf; |
1982
3b4ce57c6215
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115 if (SDL_AUDIO_ISBIGENDIAN(format)) { |
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116 for (i = cvt->len_cvt / 4; i; --i) { |
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117 sample = (Sint16) ((src[0] << 8) | src[1]) + |
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118 (Sint16) ((src[2] << 8) | src[3]); |
2042 | 119 sample /= 2; |
120 dst[1] = (sample & 0xFF); | |
121 sample >>= 8; | |
122 dst[0] = (sample & 0xFF); | |
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123 src += 4; |
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124 dst += 2; |
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125 } |
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126 } else { |
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127 for (i = cvt->len_cvt / 4; i; --i) { |
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128 sample = (Sint16) ((src[1] << 8) | src[0]) + |
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129 (Sint16) ((src[3] << 8) | src[2]); |
2042 | 130 sample /= 2; |
131 dst[0] = (sample & 0xFF); | |
132 sample >>= 8; | |
133 dst[1] = (sample & 0xFF); | |
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134 src += 4; |
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135 dst += 2; |
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136 } |
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137 } |
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138 } |
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139 break; |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
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140 |
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parents:
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141 case AUDIO_S32: |
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First shot at new audio data types (int32 and float32).
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142 { |
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143 const Uint32 *src = (const Uint32 *) cvt->buf; |
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144 Uint32 *dst = (Uint32 *) cvt->buf; |
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145 if (SDL_AUDIO_ISBIGENDIAN(format)) { |
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146 for (i = cvt->len_cvt / 8; i; --i, src += 2) { |
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147 const Sint64 added = |
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148 (((Sint64) (Sint32) SDL_SwapBE32(src[0])) + |
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149 ((Sint64) (Sint32) SDL_SwapBE32(src[1]))); |
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150 *(dst++) = SDL_SwapBE32((Uint32) ((Sint32) (added / 2))); |
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151 } |
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152 } else { |
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153 for (i = cvt->len_cvt / 8; i; --i, src += 2) { |
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154 const Sint64 added = |
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155 (((Sint64) (Sint32) SDL_SwapLE32(src[0])) + |
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156 ((Sint64) (Sint32) SDL_SwapLE32(src[1]))); |
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157 *(dst++) = SDL_SwapLE32((Uint32) ((Sint32) (added / 2))); |
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158 } |
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159 } |
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160 } |
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161 break; |
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162 |
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163 case AUDIO_F32: |
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164 { |
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165 const float *src = (const float *) cvt->buf; |
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166 float *dst = (float *) cvt->buf; |
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167 if (SDL_AUDIO_ISBIGENDIAN(format)) { |
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168 for (i = cvt->len_cvt / 8; i; --i, src += 2) { |
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169 const float src1 = SDL_SwapFloatBE(src[0]); |
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170 const float src2 = SDL_SwapFloatBE(src[1]); |
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171 const double added = ((double) src1) + ((double) src2); |
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172 const float halved = (float) (added * 0.5); |
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173 *(dst++) = SDL_SwapFloatBE(halved); |
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174 } |
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175 } else { |
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176 for (i = cvt->len_cvt / 8; i; --i, src += 2) { |
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177 const float src1 = SDL_SwapFloatLE(src[0]); |
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178 const float src2 = SDL_SwapFloatLE(src[1]); |
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179 const double added = ((double) src1) + ((double) src2); |
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180 const float halved = (float) (added * 0.5); |
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181 *(dst++) = SDL_SwapFloatLE(halved); |
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182 } |
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183 } |
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184 } |
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185 break; |
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186 } |
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187 |
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188 cvt->len_cvt /= 2; |
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189 if (cvt->filters[++cvt->filter_index]) { |
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190 cvt->filters[cvt->filter_index] (cvt, format); |
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191 } |
0 | 192 } |
193 | |
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194 |
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195 /* Discard top 4 channels */ |
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196 static void SDLCALL |
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197 SDL_ConvertStrip(SDL_AudioCVT * cvt, SDL_AudioFormat format) |
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198 { |
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199 int i; |
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200 |
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201 #ifdef DEBUG_CONVERT |
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202 fprintf(stderr, "Converting down from 6 channels to stereo\n"); |
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203 #endif |
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204 |
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205 #define strip_chans_6_to_2(type) \ |
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206 { \ |
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207 const type *src = (const type *) cvt->buf; \ |
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208 type *dst = (type *) cvt->buf; \ |
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209 for (i = cvt->len_cvt / (sizeof (type) * 6); i; --i) { \ |
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210 dst[0] = src[0]; \ |
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211 dst[1] = src[1]; \ |
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212 src += 6; \ |
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213 dst += 2; \ |
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214 } \ |
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215 } |
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216 |
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217 /* this function only cares about typesize, and data as a block of bits. */ |
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218 switch (SDL_AUDIO_BITSIZE(format)) { |
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219 case 8: |
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220 strip_chans_6_to_2(Uint8); |
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221 break; |
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222 case 16: |
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223 strip_chans_6_to_2(Uint16); |
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224 break; |
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225 case 32: |
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226 strip_chans_6_to_2(Uint32); |
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227 break; |
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228 } |
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229 |
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230 #undef strip_chans_6_to_2 |
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231 |
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232 cvt->len_cvt /= 3; |
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233 if (cvt->filters[++cvt->filter_index]) { |
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234 cvt->filters[cvt->filter_index] (cvt, format); |
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235 } |
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236 } |
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237 |
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238 |
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239 /* Discard top 2 channels of 6 */ |
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240 static void SDLCALL |
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241 SDL_ConvertStrip_2(SDL_AudioCVT * cvt, SDL_AudioFormat format) |
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242 { |
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243 int i; |
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244 |
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245 #ifdef DEBUG_CONVERT |
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246 fprintf(stderr, "Converting 6 down to quad\n"); |
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247 #endif |
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248 |
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249 #define strip_chans_6_to_4(type) \ |
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250 { \ |
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251 const type *src = (const type *) cvt->buf; \ |
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252 type *dst = (type *) cvt->buf; \ |
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253 for (i = cvt->len_cvt / (sizeof (type) * 6); i; --i) { \ |
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254 dst[0] = src[0]; \ |
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255 dst[1] = src[1]; \ |
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256 dst[2] = src[2]; \ |
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257 dst[3] = src[3]; \ |
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258 src += 6; \ |
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259 dst += 4; \ |
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260 } \ |
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261 } |
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262 |
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263 /* this function only cares about typesize, and data as a block of bits. */ |
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264 switch (SDL_AUDIO_BITSIZE(format)) { |
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265 case 8: |
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266 strip_chans_6_to_4(Uint8); |
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267 break; |
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268 case 16: |
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269 strip_chans_6_to_4(Uint16); |
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270 break; |
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271 case 32: |
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272 strip_chans_6_to_4(Uint32); |
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273 break; |
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274 } |
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275 |
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276 #undef strip_chans_6_to_4 |
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277 |
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278 cvt->len_cvt /= 6; |
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279 cvt->len_cvt *= 4; |
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280 if (cvt->filters[++cvt->filter_index]) { |
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281 cvt->filters[cvt->filter_index] (cvt, format); |
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282 } |
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283 } |
0 | 284 |
285 /* Duplicate a mono channel to both stereo channels */ | |
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286 static void SDLCALL |
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287 SDL_ConvertStereo(SDL_AudioCVT * cvt, SDL_AudioFormat format) |
0 | 288 { |
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289 int i; |
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291 #ifdef DEBUG_CONVERT | |
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292 fprintf(stderr, "Converting to stereo\n"); |
0 | 293 #endif |
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294 |
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295 #define dup_chans_1_to_2(type) \ |
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296 { \ |
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297 const type *src = (const type *) (cvt->buf + cvt->len_cvt); \ |
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298 type *dst = (type *) (cvt->buf + cvt->len_cvt * 2); \ |
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299 for (i = cvt->len_cvt / 2; i; --i, --src) { \ |
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300 const type val = *src; \ |
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301 dst -= 2; \ |
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302 dst[0] = dst[1] = val; \ |
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303 } \ |
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304 } |
0 | 305 |
1982
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306 /* this function only cares about typesize, and data as a block of bits. */ |
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307 switch (SDL_AUDIO_BITSIZE(format)) { |
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308 case 8: |
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309 dup_chans_1_to_2(Uint8); |
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310 break; |
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311 case 16: |
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312 dup_chans_1_to_2(Uint16); |
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313 break; |
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314 case 32: |
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315 dup_chans_1_to_2(Uint32); |
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316 break; |
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317 } |
0 | 318 |
1985
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319 #undef dup_chans_1_to_2 |
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320 |
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321 cvt->len_cvt *= 2; |
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322 if (cvt->filters[++cvt->filter_index]) { |
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323 cvt->filters[cvt->filter_index] (cvt, format); |
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324 } |
0 | 325 } |
326 | |
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327 |
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328 /* Duplicate a stereo channel to a pseudo-5.1 stream */ |
1982
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329 static void SDLCALL |
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330 SDL_ConvertSurround(SDL_AudioCVT * cvt, SDL_AudioFormat format) |
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331 { |
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332 int i; |
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333 |
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334 #ifdef DEBUG_CONVERT |
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335 fprintf(stderr, "Converting stereo to surround\n"); |
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336 #endif |
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337 |
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338 switch (format & (SDL_AUDIO_MASK_SIGNED | SDL_AUDIO_MASK_BITSIZE)) { |
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339 case AUDIO_U8: |
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340 { |
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341 Uint8 *src, *dst, lf, rf, ce; |
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342 |
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343 src = (Uint8 *) (cvt->buf + cvt->len_cvt); |
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344 dst = (Uint8 *) (cvt->buf + cvt->len_cvt * 3); |
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345 for (i = cvt->len_cvt; i; --i) { |
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346 dst -= 6; |
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347 src -= 2; |
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348 lf = src[0]; |
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349 rf = src[1]; |
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350 ce = (lf / 2) + (rf / 2); |
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351 dst[0] = lf; |
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352 dst[1] = rf; |
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353 dst[2] = lf - ce; |
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354 dst[3] = rf - ce; |
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355 dst[4] = ce; |
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356 dst[5] = ce; |
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357 } |
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358 } |
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359 break; |
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360 |
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361 case AUDIO_S8: |
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362 { |
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363 Sint8 *src, *dst, lf, rf, ce; |
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364 |
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365 src = (Sint8 *) cvt->buf + cvt->len_cvt; |
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366 dst = (Sint8 *) cvt->buf + cvt->len_cvt * 3; |
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367 for (i = cvt->len_cvt; i; --i) { |
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368 dst -= 6; |
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369 src -= 2; |
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370 lf = src[0]; |
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371 rf = src[1]; |
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372 ce = (lf / 2) + (rf / 2); |
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373 dst[0] = lf; |
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374 dst[1] = rf; |
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375 dst[2] = lf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
376 dst[3] = rf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
377 dst[4] = ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
378 dst[5] = ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
379 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
380 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
381 break; |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
382 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
383 case AUDIO_U16: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
384 { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
385 Uint8 *src, *dst; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
386 Uint16 lf, rf, ce, lr, rr; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
387 |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
388 src = cvt->buf + cvt->len_cvt; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
389 dst = cvt->buf + cvt->len_cvt * 3; |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
390 |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
391 if (SDL_AUDIO_ISBIGENDIAN(format)) { |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
392 for (i = cvt->len_cvt / 4; i; --i) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
393 dst -= 12; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
394 src -= 4; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
395 lf = (Uint16) ((src[0] << 8) | src[1]); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
396 rf = (Uint16) ((src[2] << 8) | src[3]); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
397 ce = (lf / 2) + (rf / 2); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
398 rr = lf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
399 lr = rf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
400 dst[1] = (lf & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
401 dst[0] = ((lf >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
402 dst[3] = (rf & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
403 dst[2] = ((rf >> 8) & 0xFF); |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
404 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
405 dst[1 + 4] = (lr & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
406 dst[0 + 4] = ((lr >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
407 dst[3 + 4] = (rr & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
408 dst[2 + 4] = ((rr >> 8) & 0xFF); |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
409 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
410 dst[1 + 8] = (ce & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
411 dst[0 + 8] = ((ce >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
412 dst[3 + 8] = (ce & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
413 dst[2 + 8] = ((ce >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
414 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
415 } else { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
416 for (i = cvt->len_cvt / 4; i; --i) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
417 dst -= 12; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
418 src -= 4; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
419 lf = (Uint16) ((src[1] << 8) | src[0]); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
420 rf = (Uint16) ((src[3] << 8) | src[2]); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
421 ce = (lf / 2) + (rf / 2); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
422 rr = lf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
423 lr = rf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
424 dst[0] = (lf & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
425 dst[1] = ((lf >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
426 dst[2] = (rf & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
427 dst[3] = ((rf >> 8) & 0xFF); |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
428 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
429 dst[0 + 4] = (lr & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
430 dst[1 + 4] = ((lr >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
431 dst[2 + 4] = (rr & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
432 dst[3 + 4] = ((rr >> 8) & 0xFF); |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
433 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
434 dst[0 + 8] = (ce & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
435 dst[1 + 8] = ((ce >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
436 dst[2 + 8] = (ce & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
437 dst[3 + 8] = ((ce >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
438 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
439 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
440 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
441 break; |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
442 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
443 case AUDIO_S16: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
444 { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
445 Uint8 *src, *dst; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
446 Sint16 lf, rf, ce, lr, rr; |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
447 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
448 src = cvt->buf + cvt->len_cvt; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
449 dst = cvt->buf + cvt->len_cvt * 3; |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
450 |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
451 if (SDL_AUDIO_ISBIGENDIAN(format)) { |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
452 for (i = cvt->len_cvt / 4; i; --i) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
453 dst -= 12; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
454 src -= 4; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
455 lf = (Sint16) ((src[0] << 8) | src[1]); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
456 rf = (Sint16) ((src[2] << 8) | src[3]); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
457 ce = (lf / 2) + (rf / 2); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
458 rr = lf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
459 lr = rf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
460 dst[1] = (lf & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
461 dst[0] = ((lf >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
462 dst[3] = (rf & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
463 dst[2] = ((rf >> 8) & 0xFF); |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
464 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
465 dst[1 + 4] = (lr & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
466 dst[0 + 4] = ((lr >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
467 dst[3 + 4] = (rr & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
468 dst[2 + 4] = ((rr >> 8) & 0xFF); |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
469 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
470 dst[1 + 8] = (ce & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
471 dst[0 + 8] = ((ce >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
472 dst[3 + 8] = (ce & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
473 dst[2 + 8] = ((ce >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
474 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
475 } else { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
476 for (i = cvt->len_cvt / 4; i; --i) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
477 dst -= 12; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
478 src -= 4; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
479 lf = (Sint16) ((src[1] << 8) | src[0]); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
480 rf = (Sint16) ((src[3] << 8) | src[2]); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
481 ce = (lf / 2) + (rf / 2); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
482 rr = lf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
483 lr = rf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
484 dst[0] = (lf & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
485 dst[1] = ((lf >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
486 dst[2] = (rf & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
487 dst[3] = ((rf >> 8) & 0xFF); |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
488 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
489 dst[0 + 4] = (lr & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
490 dst[1 + 4] = ((lr >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
491 dst[2 + 4] = (rr & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
492 dst[3 + 4] = ((rr >> 8) & 0xFF); |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
493 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
494 dst[0 + 8] = (ce & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
495 dst[1 + 8] = ((ce >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
496 dst[2 + 8] = (ce & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
497 dst[3 + 8] = ((ce >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
498 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
499 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
500 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
501 break; |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
502 |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
503 case AUDIO_S32: |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
504 { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
505 Sint32 lf, rf, ce; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
506 const Uint32 *src = (const Uint32 *) cvt->buf + cvt->len_cvt; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
507 Uint32 *dst = (Uint32 *) cvt->buf + cvt->len_cvt * 3; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
508 |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
509 if (SDL_AUDIO_ISBIGENDIAN(format)) { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
510 for (i = cvt->len_cvt / 8; i; --i) { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
511 dst -= 6; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
512 src -= 2; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
513 lf = (Sint32) SDL_SwapBE32(src[0]); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
514 rf = (Sint32) SDL_SwapBE32(src[1]); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
515 ce = (lf / 2) + (rf / 2); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
516 dst[0] = SDL_SwapBE32((Uint32) lf); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
517 dst[1] = SDL_SwapBE32((Uint32) rf); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
518 dst[2] = SDL_SwapBE32((Uint32) (lf - ce)); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
519 dst[3] = SDL_SwapBE32((Uint32) (rf - ce)); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
520 dst[4] = SDL_SwapBE32((Uint32) ce); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
521 dst[5] = SDL_SwapBE32((Uint32) ce); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
522 } |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
523 } else { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
524 for (i = cvt->len_cvt / 8; i; --i) { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
525 dst -= 6; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
526 src -= 2; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
527 lf = (Sint32) SDL_SwapLE32(src[0]); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
528 rf = (Sint32) SDL_SwapLE32(src[1]); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
529 ce = (lf / 2) + (rf / 2); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
530 dst[0] = src[0]; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
531 dst[1] = src[1]; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
532 dst[2] = SDL_SwapLE32((Uint32) (lf - ce)); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
533 dst[3] = SDL_SwapLE32((Uint32) (rf - ce)); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
534 dst[4] = SDL_SwapLE32((Uint32) ce); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
535 dst[5] = SDL_SwapLE32((Uint32) ce); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
536 } |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
537 } |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
538 } |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
539 break; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
540 |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
541 case AUDIO_F32: |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
542 { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
543 float lf, rf, ce; |
2014
7abe37467fa5
Replaced unions with calls to SDL_SwapFloat...
Ryan C. Gordon <icculus@icculus.org>
parents:
1985
diff
changeset
|
544 const float *src = (const float *) cvt->buf + cvt->len_cvt; |
7abe37467fa5
Replaced unions with calls to SDL_SwapFloat...
Ryan C. Gordon <icculus@icculus.org>
parents:
1985
diff
changeset
|
545 float *dst = (float *) cvt->buf + cvt->len_cvt * 3; |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
546 |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
547 if (SDL_AUDIO_ISBIGENDIAN(format)) { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
548 for (i = cvt->len_cvt / 8; i; --i) { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
549 dst -= 6; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
550 src -= 2; |
2014
7abe37467fa5
Replaced unions with calls to SDL_SwapFloat...
Ryan C. Gordon <icculus@icculus.org>
parents:
1985
diff
changeset
|
551 lf = SDL_SwapFloatBE(src[0]); |
7abe37467fa5
Replaced unions with calls to SDL_SwapFloat...
Ryan C. Gordon <icculus@icculus.org>
parents:
1985
diff
changeset
|
552 rf = SDL_SwapFloatBE(src[1]); |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
553 ce = (lf * 0.5f) + (rf * 0.5f); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
554 dst[0] = src[0]; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
555 dst[1] = src[1]; |
2014
7abe37467fa5
Replaced unions with calls to SDL_SwapFloat...
Ryan C. Gordon <icculus@icculus.org>
parents:
1985
diff
changeset
|
556 dst[2] = SDL_SwapFloatBE(lf - ce); |
7abe37467fa5
Replaced unions with calls to SDL_SwapFloat...
Ryan C. Gordon <icculus@icculus.org>
parents:
1985
diff
changeset
|
557 dst[3] = SDL_SwapFloatBE(rf - ce); |
7abe37467fa5
Replaced unions with calls to SDL_SwapFloat...
Ryan C. Gordon <icculus@icculus.org>
parents:
1985
diff
changeset
|
558 dst[4] = dst[5] = SDL_SwapFloatBE(ce); |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
559 } |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
560 } else { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
561 for (i = cvt->len_cvt / 8; i; --i) { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
562 dst -= 6; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
563 src -= 2; |
2014
7abe37467fa5
Replaced unions with calls to SDL_SwapFloat...
Ryan C. Gordon <icculus@icculus.org>
parents:
1985
diff
changeset
|
564 lf = SDL_SwapFloatLE(src[0]); |
7abe37467fa5
Replaced unions with calls to SDL_SwapFloat...
Ryan C. Gordon <icculus@icculus.org>
parents:
1985
diff
changeset
|
565 rf = SDL_SwapFloatLE(src[1]); |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
566 ce = (lf * 0.5f) + (rf * 0.5f); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
567 dst[0] = src[0]; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
568 dst[1] = src[1]; |
2014
7abe37467fa5
Replaced unions with calls to SDL_SwapFloat...
Ryan C. Gordon <icculus@icculus.org>
parents:
1985
diff
changeset
|
569 dst[2] = SDL_SwapFloatLE(lf - ce); |
7abe37467fa5
Replaced unions with calls to SDL_SwapFloat...
Ryan C. Gordon <icculus@icculus.org>
parents:
1985
diff
changeset
|
570 dst[3] = SDL_SwapFloatLE(rf - ce); |
7abe37467fa5
Replaced unions with calls to SDL_SwapFloat...
Ryan C. Gordon <icculus@icculus.org>
parents:
1985
diff
changeset
|
571 dst[4] = dst[5] = SDL_SwapFloatLE(ce); |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
572 } |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
573 } |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
574 } |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
575 break; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
576 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
577 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
578 cvt->len_cvt *= 3; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
579 if (cvt->filters[++cvt->filter_index]) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
580 cvt->filters[cvt->filter_index] (cvt, format); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
581 } |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
582 } |
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
583 |
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
584 |
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
585 /* Duplicate a stereo channel to a pseudo-4.0 stream */ |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
586 static void SDLCALL |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
587 SDL_ConvertSurround_4(SDL_AudioCVT * cvt, SDL_AudioFormat format) |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
588 { |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
589 int i; |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
590 |
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
591 #ifdef DEBUG_CONVERT |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
592 fprintf(stderr, "Converting stereo to quad\n"); |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
593 #endif |
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
594 |
1985
8055185ae4ed
Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents:
1982
diff
changeset
|
595 switch (format & (SDL_AUDIO_MASK_SIGNED | SDL_AUDIO_MASK_BITSIZE)) { |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
596 case AUDIO_U8: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
597 { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
598 Uint8 *src, *dst, lf, rf, ce; |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
599 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
600 src = (Uint8 *) (cvt->buf + cvt->len_cvt); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
601 dst = (Uint8 *) (cvt->buf + cvt->len_cvt * 2); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
602 for (i = cvt->len_cvt; i; --i) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
603 dst -= 4; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
604 src -= 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
605 lf = src[0]; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
606 rf = src[1]; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
607 ce = (lf / 2) + (rf / 2); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
608 dst[0] = lf; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
609 dst[1] = rf; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
610 dst[2] = lf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
611 dst[3] = rf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
612 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
613 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
614 break; |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
615 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
616 case AUDIO_S8: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
617 { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
618 Sint8 *src, *dst, lf, rf, ce; |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
619 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
620 src = (Sint8 *) cvt->buf + cvt->len_cvt; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
621 dst = (Sint8 *) cvt->buf + cvt->len_cvt * 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
622 for (i = cvt->len_cvt; i; --i) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
623 dst -= 4; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
624 src -= 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
625 lf = src[0]; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
626 rf = src[1]; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
627 ce = (lf / 2) + (rf / 2); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
628 dst[0] = lf; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
629 dst[1] = rf; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
630 dst[2] = lf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
631 dst[3] = rf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
632 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
633 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
634 break; |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
635 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
636 case AUDIO_U16: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
637 { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
638 Uint8 *src, *dst; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
639 Uint16 lf, rf, ce, lr, rr; |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
640 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
641 src = cvt->buf + cvt->len_cvt; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
642 dst = cvt->buf + cvt->len_cvt * 2; |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
643 |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
644 if (SDL_AUDIO_ISBIGENDIAN(format)) { |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
645 for (i = cvt->len_cvt / 4; i; --i) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
646 dst -= 8; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
647 src -= 4; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
648 lf = (Uint16) ((src[0] << 8) | src[1]); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
649 rf = (Uint16) ((src[2] << 8) | src[3]); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
650 ce = (lf / 2) + (rf / 2); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
651 rr = lf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
652 lr = rf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
653 dst[1] = (lf & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
654 dst[0] = ((lf >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
655 dst[3] = (rf & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
656 dst[2] = ((rf >> 8) & 0xFF); |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
657 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
658 dst[1 + 4] = (lr & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
659 dst[0 + 4] = ((lr >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
660 dst[3 + 4] = (rr & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
661 dst[2 + 4] = ((rr >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
662 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
663 } else { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
664 for (i = cvt->len_cvt / 4; i; --i) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
665 dst -= 8; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
666 src -= 4; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
667 lf = (Uint16) ((src[1] << 8) | src[0]); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
668 rf = (Uint16) ((src[3] << 8) | src[2]); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
669 ce = (lf / 2) + (rf / 2); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
670 rr = lf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
671 lr = rf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
672 dst[0] = (lf & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
673 dst[1] = ((lf >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
674 dst[2] = (rf & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
675 dst[3] = ((rf >> 8) & 0xFF); |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
676 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
677 dst[0 + 4] = (lr & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
678 dst[1 + 4] = ((lr >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
679 dst[2 + 4] = (rr & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
680 dst[3 + 4] = ((rr >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
681 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
682 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
683 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
684 break; |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
685 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
686 case AUDIO_S16: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
687 { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
688 Uint8 *src, *dst; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
689 Sint16 lf, rf, ce, lr, rr; |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
690 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
691 src = cvt->buf + cvt->len_cvt; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
692 dst = cvt->buf + cvt->len_cvt * 2; |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
693 |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
694 if (SDL_AUDIO_ISBIGENDIAN(format)) { |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
695 for (i = cvt->len_cvt / 4; i; --i) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
696 dst -= 8; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
697 src -= 4; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
698 lf = (Sint16) ((src[0] << 8) | src[1]); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
699 rf = (Sint16) ((src[2] << 8) | src[3]); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
700 ce = (lf / 2) + (rf / 2); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
701 rr = lf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
702 lr = rf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
703 dst[1] = (lf & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
704 dst[0] = ((lf >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
705 dst[3] = (rf & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
706 dst[2] = ((rf >> 8) & 0xFF); |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
707 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
708 dst[1 + 4] = (lr & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
709 dst[0 + 4] = ((lr >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
710 dst[3 + 4] = (rr & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
711 dst[2 + 4] = ((rr >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
712 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
713 } else { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
714 for (i = cvt->len_cvt / 4; i; --i) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
715 dst -= 8; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
716 src -= 4; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
717 lf = (Sint16) ((src[1] << 8) | src[0]); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
718 rf = (Sint16) ((src[3] << 8) | src[2]); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
719 ce = (lf / 2) + (rf / 2); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
720 rr = lf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
721 lr = rf - ce; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
722 dst[0] = (lf & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
723 dst[1] = ((lf >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
724 dst[2] = (rf & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
725 dst[3] = ((rf >> 8) & 0xFF); |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
726 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
727 dst[0 + 4] = (lr & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
728 dst[1 + 4] = ((lr >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
729 dst[2 + 4] = (rr & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
730 dst[3 + 4] = ((rr >> 8) & 0xFF); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
731 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
732 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
733 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
734 break; |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
735 |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
736 case AUDIO_S32: |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
737 { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
738 const Uint32 *src = (const Uint32 *) (cvt->buf + cvt->len_cvt); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
739 Uint32 *dst = (Uint32 *) (cvt->buf + cvt->len_cvt * 2); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
740 Sint32 lf, rf, ce; |
0 | 741 |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
742 if (SDL_AUDIO_ISBIGENDIAN(format)) { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
743 for (i = cvt->len_cvt / 8; i; --i) { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
744 dst -= 4; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
745 src -= 2; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
746 lf = (Sint32) SDL_SwapBE32(src[0]); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
747 rf = (Sint32) SDL_SwapBE32(src[1]); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
748 ce = (lf / 2) + (rf / 2); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
749 dst[0] = src[0]; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
750 dst[1] = src[1]; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
751 dst[2] = SDL_SwapBE32((Uint32) (lf - ce)); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
752 dst[3] = SDL_SwapBE32((Uint32) (rf - ce)); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
753 } |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
754 } else { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
755 for (i = cvt->len_cvt / 8; i; --i) { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
756 dst -= 4; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
757 src -= 2; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
758 lf = (Sint32) SDL_SwapLE32(src[0]); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
759 rf = (Sint32) SDL_SwapLE32(src[1]); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
760 ce = (lf / 2) + (rf / 2); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
761 dst[0] = src[0]; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
762 dst[1] = src[1]; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
763 dst[2] = SDL_SwapLE32((Uint32) (lf - ce)); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
764 dst[3] = SDL_SwapLE32((Uint32) (rf - ce)); |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
765 } |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
766 } |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
767 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
768 break; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
769 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
770 cvt->len_cvt *= 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
771 if (cvt->filters[++cvt->filter_index]) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
772 cvt->filters[cvt->filter_index] (cvt, format); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
773 } |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
774 } |
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
775 |
0 | 776 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
777 int |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
778 SDL_ConvertAudio(SDL_AudioCVT * cvt) |
0 | 779 { |
3021
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
780 /* !!! FIXME: (cvt) should be const; stack-copy it here. */ |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
781 /* !!! FIXME: (actually, we can't...len_cvt needs to be updated. Grr.) */ |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
782 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
783 /* Make sure there's data to convert */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
784 if (cvt->buf == NULL) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
785 SDL_SetError("No buffer allocated for conversion"); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
786 return (-1); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
787 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
788 /* Return okay if no conversion is necessary */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
789 cvt->len_cvt = cvt->len; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
790 if (cvt->filters[0] == NULL) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
791 return (0); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
792 } |
0 | 793 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
794 /* Set up the conversion and go! */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
795 cvt->filter_index = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
796 cvt->filters[0] (cvt, cvt->src_format); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
797 return (0); |
0 | 798 } |
799 | |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
800 |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
801 static SDL_AudioFilter |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
802 SDL_HandTunedTypeCVT(SDL_AudioFormat src_fmt, SDL_AudioFormat dst_fmt) |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
803 { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
804 /* |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
805 * Fill in any future conversions that are specialized to a |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
806 * processor, platform, compiler, or library here. |
3b4ce57c6215
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parents:
1895
diff
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|
807 */ |
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Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
808 |
1985
8055185ae4ed
Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents:
1982
diff
changeset
|
809 return NULL; /* no specialized converter code available. */ |
1982
3b4ce57c6215
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Ryan C. Gordon <icculus@icculus.org>
parents:
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|
810 } |
3b4ce57c6215
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Ryan C. Gordon <icculus@icculus.org>
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|
811 |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
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|
812 |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
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parents:
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diff
changeset
|
813 /* |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
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parents:
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diff
changeset
|
814 * Find a converter between two data types. We try to select a hand-tuned |
3b4ce57c6215
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parents:
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diff
changeset
|
815 * asm/vectorized/optimized function first, and then fallback to an |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
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|
816 * autogenerated function that is customized to convert between two |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
817 * specific data types. |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
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parents:
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diff
changeset
|
818 */ |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
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parents:
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diff
changeset
|
819 static int |
3b4ce57c6215
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parents:
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changeset
|
820 SDL_BuildAudioTypeCVT(SDL_AudioCVT * cvt, |
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First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
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|
821 SDL_AudioFormat src_fmt, SDL_AudioFormat dst_fmt) |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
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parents:
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diff
changeset
|
822 { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
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parents:
1895
diff
changeset
|
823 if (src_fmt != dst_fmt) { |
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Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
824 const Uint16 src_bitsize = SDL_AUDIO_BITSIZE(src_fmt); |
3b4ce57c6215
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Ryan C. Gordon <icculus@icculus.org>
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|
825 const Uint16 dst_bitsize = SDL_AUDIO_BITSIZE(dst_fmt); |
3b4ce57c6215
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parents:
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diff
changeset
|
826 SDL_AudioFilter filter = SDL_HandTunedTypeCVT(src_fmt, dst_fmt); |
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Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
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|
827 |
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First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
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changeset
|
828 /* No hand-tuned converter? Try the autogenerated ones. */ |
3b4ce57c6215
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parents:
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diff
changeset
|
829 if (filter == NULL) { |
3b4ce57c6215
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Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
830 int i; |
3b4ce57c6215
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Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
831 for (i = 0; sdl_audio_type_filters[i].filter != NULL; i++) { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
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diff
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|
832 const SDL_AudioTypeFilters *filt = &sdl_audio_type_filters[i]; |
3b4ce57c6215
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Ryan C. Gordon <icculus@icculus.org>
parents:
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|
833 if ((filt->src_fmt == src_fmt) && (filt->dst_fmt == dst_fmt)) { |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
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|
834 filter = filt->filter; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
835 break; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
836 } |
3b4ce57c6215
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Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
changeset
|
837 } |
3b4ce57c6215
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Ryan C. Gordon <icculus@icculus.org>
parents:
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diff
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|
838 |
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Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
839 if (filter == NULL) { |
3491
1192adfc6d52
Add error messages for failure cases
Sam Lantinga <slouken@libsdl.org>
parents:
3040
diff
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|
840 SDL_SetError("No conversion available for these formats"); |
1192adfc6d52
Add error messages for failure cases
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parents:
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|
841 return -1; |
1982
3b4ce57c6215
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|
842 } |
3b4ce57c6215
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diff
changeset
|
843 } |
3b4ce57c6215
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parents:
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diff
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|
844 |
3b4ce57c6215
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parents:
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diff
changeset
|
845 /* Update (cvt) with filter details... */ |
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Ryan C. Gordon <icculus@icculus.org>
parents:
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|
846 cvt->filters[cvt->filter_index++] = filter; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
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|
847 if (src_bitsize < dst_bitsize) { |
3b4ce57c6215
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diff
changeset
|
848 const int mult = (dst_bitsize / src_bitsize); |
3b4ce57c6215
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Ryan C. Gordon <icculus@icculus.org>
parents:
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changeset
|
849 cvt->len_mult *= mult; |
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First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
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850 cvt->len_ratio *= mult; |
3b4ce57c6215
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Ryan C. Gordon <icculus@icculus.org>
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|
851 } else if (src_bitsize > dst_bitsize) { |
3b4ce57c6215
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parents:
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diff
changeset
|
852 cvt->len_ratio /= (src_bitsize / dst_bitsize); |
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Ryan C. Gordon <icculus@icculus.org>
parents:
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|
853 } |
3b4ce57c6215
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Ryan C. Gordon <icculus@icculus.org>
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diff
changeset
|
854 |
1985
8055185ae4ed
Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents:
1982
diff
changeset
|
855 return 1; /* added a converter. */ |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
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|
856 } |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
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diff
changeset
|
857 |
1985
8055185ae4ed
Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents:
1982
diff
changeset
|
858 return 0; /* no conversion necessary. */ |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
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parents:
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diff
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|
859 } |
3b4ce57c6215
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parents:
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diff
changeset
|
860 |
2716
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diff
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|
861 |
3021
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diff
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|
862 static SDL_AudioFilter |
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|
863 SDL_HandTunedResampleCVT(SDL_AudioCVT * cvt, int dst_channels, |
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|
864 int src_rate, int dst_rate) |
2716
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diff
changeset
|
865 { |
3021
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diff
changeset
|
866 /* |
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diff
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|
867 * Fill in any future conversions that are specialized to a |
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parents:
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diff
changeset
|
868 * processor, platform, compiler, or library here. |
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First shot at new audio resampling code.
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parents:
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|
869 */ |
2716
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|
870 |
3021
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Ryan C. Gordon <icculus@icculus.org>
parents:
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|
871 return NULL; /* no specialized converter code available. */ |
2716
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|
872 } |
f8f68f47285a
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|
873 |
3021
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|
874 static int |
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changeset
|
875 SDL_FindFrequencyMultiple(const int src_rate, const int dst_rate) |
2716
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|
876 { |
3021
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|
877 int retval = 0; |
2716
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|
878 |
3021
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|
879 /* If we only built with the arbitrary resamplers, ignore multiples. */ |
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|
880 #if !LESS_RESAMPLERS |
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|
881 int lo, hi; |
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changeset
|
882 int div; |
2716
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|
883 |
3021
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|
884 assert(src_rate != 0); |
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|
885 assert(dst_rate != 0); |
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|
886 assert(src_rate != dst_rate); |
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|
887 |
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|
888 if (src_rate < dst_rate) { |
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|
889 lo = src_rate; |
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|
890 hi = dst_rate; |
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|
891 } else { |
3021
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|
892 lo = dst_rate; |
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|
893 hi = src_rate; |
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|
894 } |
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|
895 |
3021
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|
896 /* zero means "not a supported multiple" ... we only do 2x and 4x. */ |
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|
897 if ((hi % lo) != 0) |
3040 | 898 return 0; /* not a multiple. */ |
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|
899 |
3021
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|
900 div = hi / lo; |
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|
901 retval = ((div == 2) || (div == 4)) ? div : 0; |
2716
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|
902 #endif |
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|
903 |
3021
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|
904 return retval; |
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|
905 } |
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|
906 |
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First shot at new audio resampling code.
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|
907 static int |
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|
908 SDL_BuildAudioResampleCVT(SDL_AudioCVT * cvt, int dst_channels, |
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|
909 int src_rate, int dst_rate) |
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|
910 { |
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|
911 if (src_rate != dst_rate) { |
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|
912 SDL_AudioFilter filter = SDL_HandTunedResampleCVT(cvt, dst_channels, |
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|
913 src_rate, dst_rate); |
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|
914 |
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changeset
|
915 /* No hand-tuned converter? Try the autogenerated ones. */ |
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|
916 if (filter == NULL) { |
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|
917 int i; |
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|
918 const int upsample = (src_rate < dst_rate) ? 1 : 0; |
3040 | 919 const int multiple = |
920 SDL_FindFrequencyMultiple(src_rate, dst_rate); | |
2716
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|
921 |
3021
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|
922 for (i = 0; sdl_audio_rate_filters[i].filter != NULL; i++) { |
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|
923 const SDL_AudioRateFilters *filt = &sdl_audio_rate_filters[i]; |
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|
924 if ((filt->fmt == cvt->dst_format) && |
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|
925 (filt->channels == dst_channels) && |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
926 (filt->upsample == upsample) && |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
927 (filt->multiple == multiple)) { |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
928 filter = filt->filter; |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
929 break; |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
930 } |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
931 } |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
932 |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
933 if (filter == NULL) { |
3491
1192adfc6d52
Add error messages for failure cases
Sam Lantinga <slouken@libsdl.org>
parents:
3040
diff
changeset
|
934 SDL_SetError("No conversion available for these rates"); |
1192adfc6d52
Add error messages for failure cases
Sam Lantinga <slouken@libsdl.org>
parents:
3040
diff
changeset
|
935 return -1; |
3021
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
936 } |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
937 } |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
938 |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
939 /* Update (cvt) with filter details... */ |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
940 cvt->filters[cvt->filter_index++] = filter; |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
941 if (src_rate < dst_rate) { |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
942 const double mult = ((double) dst_rate) / ((double) src_rate); |
3032 | 943 cvt->len_mult *= (int) SDL_ceil(mult); |
3021
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
944 cvt->len_ratio *= mult; |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
945 } else { |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
946 cvt->len_ratio /= ((double) src_rate) / ((double) dst_rate); |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
947 } |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
948 |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
949 return 1; /* added a converter. */ |
2716
f8f68f47285a
Final merge of Google Summer of Code 2008 work...
Sam Lantinga <slouken@libsdl.org>
parents:
2130
diff
changeset
|
950 } |
f8f68f47285a
Final merge of Google Summer of Code 2008 work...
Sam Lantinga <slouken@libsdl.org>
parents:
2130
diff
changeset
|
951 |
3021
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
952 return 0; /* no conversion necessary. */ |
2716
f8f68f47285a
Final merge of Google Summer of Code 2008 work...
Sam Lantinga <slouken@libsdl.org>
parents:
2130
diff
changeset
|
953 } |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
954 |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
955 |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
956 /* Creates a set of audio filters to convert from one format to another. |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
957 Returns -1 if the format conversion is not supported, 0 if there's |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
958 no conversion needed, or 1 if the audio filter is set up. |
0 | 959 */ |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
960 |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
961 int |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
962 SDL_BuildAudioCVT(SDL_AudioCVT * cvt, |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
963 SDL_AudioFormat src_fmt, Uint8 src_channels, int src_rate, |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
964 SDL_AudioFormat dst_fmt, Uint8 dst_channels, int dst_rate) |
0 | 965 { |
3021
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
966 /* |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
967 * !!! FIXME: reorder filters based on which grow/shrink the buffer. |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
968 * !!! FIXME: ideally, we should do everything that shrinks the buffer |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
969 * !!! FIXME: first, so we don't have to process as many bytes in a given |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
970 * !!! FIXME: filter and abuse the CPU cache less. This might not be as |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
971 * !!! FIXME: good in practice as it sounds in theory, though. |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
972 */ |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
973 |
3491
1192adfc6d52
Add error messages for failure cases
Sam Lantinga <slouken@libsdl.org>
parents:
3040
diff
changeset
|
974 /* there are no unsigned types over 16 bits, so catch this up front. */ |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
975 if ((SDL_AUDIO_BITSIZE(src_fmt) > 16) && (!SDL_AUDIO_ISSIGNED(src_fmt))) { |
3491
1192adfc6d52
Add error messages for failure cases
Sam Lantinga <slouken@libsdl.org>
parents:
3040
diff
changeset
|
976 SDL_SetError("Invalid source format"); |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
977 return -1; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
978 } |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
979 if ((SDL_AUDIO_BITSIZE(dst_fmt) > 16) && (!SDL_AUDIO_ISSIGNED(dst_fmt))) { |
3491
1192adfc6d52
Add error messages for failure cases
Sam Lantinga <slouken@libsdl.org>
parents:
3040
diff
changeset
|
980 SDL_SetError("Invalid destination format"); |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
981 return -1; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
982 } |
3021
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
983 |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
984 /* prevent possible divisions by zero, etc. */ |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
985 if ((src_rate == 0) || (dst_rate == 0)) { |
3491
1192adfc6d52
Add error messages for failure cases
Sam Lantinga <slouken@libsdl.org>
parents:
3040
diff
changeset
|
986 SDL_SetError("Source or destination rate is zero"); |
3021
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
987 return -1; |
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
988 } |
1985
8055185ae4ed
Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents:
1982
diff
changeset
|
989 #ifdef DEBUG_CONVERT |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
990 printf("Build format %04x->%04x, channels %u->%u, rate %d->%d\n", |
1985
8055185ae4ed
Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents:
1982
diff
changeset
|
991 src_fmt, dst_fmt, src_channels, dst_channels, src_rate, dst_rate); |
8055185ae4ed
Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents:
1982
diff
changeset
|
992 #endif |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
993 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
994 /* Start off with no conversion necessary */ |
2879
3ff86c46d324
Use SDL_zerop instead of SDL_memset.
Ryan C. Gordon <icculus@icculus.org>
parents:
2878
diff
changeset
|
995 SDL_zerop(cvt); |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
996 cvt->src_format = src_fmt; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
997 cvt->dst_format = dst_fmt; |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
998 cvt->needed = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
999 cvt->filter_index = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1000 cvt->filters[0] = NULL; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1001 cvt->len_mult = 1; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1002 cvt->len_ratio = 1.0; |
3021
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
1003 cvt->rate_incr = ((double) dst_rate) / ((double) src_rate); |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1004 |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
1005 /* Convert data types, if necessary. Updates (cvt). */ |
3021
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
1006 if (SDL_BuildAudioTypeCVT(cvt, src_fmt, dst_fmt) == -1) { |
1985
8055185ae4ed
Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents:
1982
diff
changeset
|
1007 return -1; /* shouldn't happen, but just in case... */ |
3021
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
1008 } |
0 | 1009 |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
1010 /* Channel conversion */ |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1011 if (src_channels != dst_channels) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1012 if ((src_channels == 1) && (dst_channels > 1)) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1013 cvt->filters[cvt->filter_index++] = SDL_ConvertStereo; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1014 cvt->len_mult *= 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1015 src_channels = 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1016 cvt->len_ratio *= 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1017 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1018 if ((src_channels == 2) && (dst_channels == 6)) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1019 cvt->filters[cvt->filter_index++] = SDL_ConvertSurround; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1020 src_channels = 6; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1021 cvt->len_mult *= 3; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1022 cvt->len_ratio *= 3; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1023 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1024 if ((src_channels == 2) && (dst_channels == 4)) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1025 cvt->filters[cvt->filter_index++] = SDL_ConvertSurround_4; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1026 src_channels = 4; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1027 cvt->len_mult *= 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1028 cvt->len_ratio *= 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1029 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1030 while ((src_channels * 2) <= dst_channels) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1031 cvt->filters[cvt->filter_index++] = SDL_ConvertStereo; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1032 cvt->len_mult *= 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1033 src_channels *= 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1034 cvt->len_ratio *= 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1035 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1036 if ((src_channels == 6) && (dst_channels <= 2)) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1037 cvt->filters[cvt->filter_index++] = SDL_ConvertStrip; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1038 src_channels = 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1039 cvt->len_ratio /= 3; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
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1040 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1041 if ((src_channels == 6) && (dst_channels == 4)) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1042 cvt->filters[cvt->filter_index++] = SDL_ConvertStrip_2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1043 src_channels = 4; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1044 cvt->len_ratio /= 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1045 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1046 /* This assumes that 4 channel audio is in the format: |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
1047 Left {front/back} + Right {front/back} |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1048 so converting to L/R stereo works properly. |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1049 */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1050 while (((src_channels % 2) == 0) && |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1051 ((src_channels / 2) >= dst_channels)) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1052 cvt->filters[cvt->filter_index++] = SDL_ConvertMono; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1053 src_channels /= 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1054 cvt->len_ratio /= 2; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1055 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1056 if (src_channels != dst_channels) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1057 /* Uh oh.. */ ; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
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1058 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
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1059 } |
0 | 1060 |
3021
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
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1061 /* Do rate conversion, if necessary. Updates (cvt). */ |
3040 | 1062 if (SDL_BuildAudioResampleCVT(cvt, dst_channels, src_rate, dst_rate) == |
1063 -1) { | |
3021
f3dcf04412cf
First shot at new audio resampling code.
Ryan C. Gordon <icculus@icculus.org>
parents:
3012
diff
changeset
|
1064 return -1; /* shouldn't happen, but just in case... */ |
2716
f8f68f47285a
Final merge of Google Summer of Code 2008 work...
Sam Lantinga <slouken@libsdl.org>
parents:
2130
diff
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1065 } |
f8f68f47285a
Final merge of Google Summer of Code 2008 work...
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
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1066 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
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|
1067 /* Set up the filter information */ |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1068 if (cvt->filter_index != 0) { |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
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1069 cvt->needed = 1; |
1982
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
1070 cvt->src_format = src_fmt; |
3b4ce57c6215
First shot at new audio data types (int32 and float32).
Ryan C. Gordon <icculus@icculus.org>
parents:
1895
diff
changeset
|
1071 cvt->dst_format = dst_fmt; |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
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1072 cvt->len = 0; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1073 cvt->buf = NULL; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1074 cvt->filters[cvt->filter_index] = NULL; |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1075 } |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1076 return (cvt->needed); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1769
diff
changeset
|
1077 } |
0 | 1078 |
2716
f8f68f47285a
Final merge of Google Summer of Code 2008 work...
Sam Lantinga <slouken@libsdl.org>
parents:
2130
diff
changeset
|
1079 |
1895
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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1080 /* vi: set ts=4 sw=4 expandtab: */ |