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annotate src/audio/dc/SDL_dcaudio.c @ 3099:82e60908fab1

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Date: Mon, 23 Mar 2009 09:17:24 +0200 From: "Mike Gorchak" Subject: New QNX patches Please apply patch qnx4.diff, which is attached. What has been done: 1)Added back OpenGL ES renderer for QNX target. Added few corrections to OpenGL ES renderer to let it work under QNX. OpenGL ES renderer do not support textures under QNX, so I think some additional work must be done. 2) Added GL_OES_query_matrix extension to SDL_opengles.h header file, which required by OpenGL ES 1.1 specification. 3) Added attribute clearing at the entrance of function SDL_GL_GetAttribure(). Added error checking into the function SDL_GL_GetAttribure(), because some attributes can't be obtained in OpenGL ES 1.0. 4) Porting testdyngles to OpenGL ES 1.0 (1.1 has glColor4ub() and glColor4f() functions, but 1.0 has glColor4f() only). 5) Added error checking after obtaining attributes using SDL_GL_GetAttribute() function to the testgl2 and testgles. 6) Small correction to testmultiaudio with printing errors. 7) Added software and accelerated OpenGL ES 1.0 support into the QNX GF driver. Please remove ./src/audio/nto directory - it will not be used anymore. Please create ./src/audio/qsa directory and add content of the archive qsa.tar.gz into this directory. I rewrote some sound code, added support for multiple audio cards, enumeration, etc. Added initial support for capture. As far as I can understand SDL 1.3 is not supporting audio capture right now ? Sam, Am I right ? Or audio capture must be supported through the PlayDevice routine ? And last, please put file SDL_gf_opengles.c to the ./src/video/qnxgf directory. It is OpenGL ES 1.1 emulation layer for some functions, which are not supported by OpenGL ES 1.0.
author Sam Lantinga <slouken@libsdl.org>
date Tue, 24 Mar 2009 10:33:12 +0000
parents 99210400e8b9
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
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4
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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
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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.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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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
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21
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22 */
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23 #include "SDL_config.h"
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24
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25 /* Output dreamcast aica */
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26
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27 #include "SDL_timer.h"
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28 #include "SDL_audio.h"
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29 #include "../SDL_audiomem.h"
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30 #include "../SDL_audio_c.h"
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31 #include "SDL_dcaudio.h"
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32
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33 #include "aica.h"
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34 #include <dc/spu.h>
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35
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36 #define SPU_RAM_BASE 0xa0800000
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37
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38 static void
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39 spu_memload_stereo8(int leftpos, int rightpos, void *src0, size_t size)
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40 {
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41 uint8 *src = src0;
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42 uint32 *left = (uint32 *) (leftpos + SPU_RAM_BASE);
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43 uint32 *right = (uint32 *) (rightpos + SPU_RAM_BASE);
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44 size = (size + 7) / 8;
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45 while (size--) {
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46 unsigned lval, rval;
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47 lval = *src++;
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48 rval = *src++;
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49 lval |= (*src++) << 8;
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50 rval |= (*src++) << 8;
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51 lval |= (*src++) << 16;
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52 rval |= (*src++) << 16;
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53 lval |= (*src++) << 24;
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54 rval |= (*src++) << 24;
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55 g2_write_32(left++, lval);
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56 g2_write_32(right++, rval);
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57 g2_fifo_wait();
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58 }
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59 }
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60
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61 static void
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62 spu_memload_stereo16(int leftpos, int rightpos, void *src0, size_t size)
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63 {
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64 uint16 *src = src0;
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65 uint32 *left = (uint32 *) (leftpos + SPU_RAM_BASE);
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66 uint32 *right = (uint32 *) (rightpos + SPU_RAM_BASE);
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67 size = (size + 7) / 8;
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68 while (size--) {
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69 unsigned lval, rval;
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70 lval = *src++;
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71 rval = *src++;
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72 lval |= (*src++) << 16;
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73 rval |= (*src++) << 16;
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74 g2_write_32(left++, lval);
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75 g2_write_32(right++, rval);
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76 g2_fifo_wait();
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77 }
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78 }
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79
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80 static void
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81 DCAUD_PlayDevice(_THIS)
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82 {
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83 SDL_AudioSpec *spec = &this->spec;
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84 unsigned int offset;
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85
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86 if (this->hidden->playing) {
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87 /* wait */
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88 while (aica_get_pos(0) / spec->samples == this->hidden->nextbuf) {
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89 thd_pass();
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90 }
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91 }
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92
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93 offset = this->hidden->nextbuf * spec->size;
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94 this->hidden->nextbuf ^= 1;
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95 /* Write the audio data, checking for EAGAIN on broken audio drivers */
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96 if (spec->channels == 1) {
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97 spu_memload(this->hidden->leftpos + offset, this->hidden->mixbuf,
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98 this->hidden->mixlen);
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99 } else {
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100 offset /= 2;
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101 if ((this->spec.format & 255) == 8) {
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102 spu_memload_stereo8(this->hidden->leftpos + offset,
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103 this->hidden->rightpos + offset,
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104 this->hidden->mixbuf, this->hidden->mixlen);
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105 } else {
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106 spu_memload_stereo16(this->hidden->leftpos + offset,
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107 this->hidden->rightpos + offset,
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108 this->hidden->mixbuf, this->hidden->mixlen);
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109 }
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110 }
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111
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112 if (!this->hidden->playing) {
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113 int mode;
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114 this->hidden->playing = 1;
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115 mode = (spec->format == AUDIO_S8) ? SM_8BIT : SM_16BIT;
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116 if (spec->channels == 1) {
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117 aica_play(0, mode, this->hidden->leftpos, 0,
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118 spec->samples * 2, spec->freq, 255, 128, 1);
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119 } else {
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120 aica_play(0, mode, this->hidden->leftpos, 0,
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121 spec->samples * 2, spec->freq, 255, 0, 1);
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122 aica_play(1, mode, this->hidden->rightpos, 0,
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123 spec->samples * 2, spec->freq, 255, 255, 1);
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124 }
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125 }
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126 }
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127
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128 static Uint8 *
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129 DCAUD_GetDeviceBuf(_THIS)
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130 {
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131 return (this->hidden->mixbuf);
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132 }
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133
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134 /* This function waits until it is possible to write a full sound buffer */
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135 static void
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136 DCAUD_WaitDevice(_THIS)
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137 {
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138 if (this->hidden->playing) {
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139 /* wait */
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140 while (aica_get_pos(0) / this->spec.samples == this->hidden->nextbuf) {
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141 thd_pass();
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142 }
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143 }
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144 }
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145
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146 static void
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147 DCAUD_CloseDevice(_THIS)
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148 {
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149 if (this->hidden != NULL) {
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150 aica_stop(0);
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151 if (this->spec.channels == 2) {
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152 aica_stop(1);
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153 }
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154 if (this->hidden->mixbuf != NULL) {
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155 SDL_FreeAudioMem(this->hidden->mixbuf);
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156 this->hidden->mixbuf = NULL;
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157 }
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158 SDL_free(this->hidden);
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159 this->hidden = NULL;
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160
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161 /* !!! FIXME: is there a reverse of spu_init()? */
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162 }
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163 }
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164
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165 static int
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166 DCAUD_OpenDevice(_THIS, SDL_AudioSpec * spec)
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167 {
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168 SDL_AudioFormat test_format = SDL_FirstAudioFormat(spec->format);
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169 int valid_datatype = 0;
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170
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171 /* Initialize all variables that we clean on shutdown */
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172 this->hidden = (struct SDL_PrivateAudioData *)
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173 SDL_malloc((sizeof *this->hidden));
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174 if (this->hidden == NULL) {
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175 SDL_OutOfMemory();
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176 return 0;
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177 }
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178 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
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179
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180 spu_init();
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181
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182 while ((!valid_datatype) && (test_format)) {
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183 spec->format = test_format;
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184 switch (test_format) {
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185 /* only formats Dreamcast accepts... */
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186 case AUDIO_S8:
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187 case AUDIO_S16LSB:
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188 valid_datatype = 1;
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189 break;
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190
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191 default:
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192 test_format = SDL_NextAudioFormat();
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193 break;
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194 }
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195 }
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196
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197 if (!valid_datatype) { /* shouldn't happen, but just in case... */
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198 DCAUD_CloseDevice(this);
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199 SDL_SetError("Unsupported audio format");
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200 return 0;
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201 }
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202
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203 if (spec->channels > 2)
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204 spec->channels = 2; /* no more than stereo on the Dreamcast. */
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205
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206 /* Update the fragment size as size in bytes */
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207 SDL_CalculateAudioSpec(spec);
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208
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209 /* Allocate mixing buffer */
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210 this->hidden->mixlen = spec->size;
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211 this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
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212 if (this->hidden->mixbuf == NULL) {
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213 DCAUD_CloseDevice(this);
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214 SDL_OutOfMemory();
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215 return 0;
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216 }
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217 SDL_memset(this->hidden->mixbuf, spec->silence, spec->size);
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218 this->hidden->leftpos = 0x11000;
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219 this->hidden->rightpos = 0x11000 + spec->size;
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220 this->hidden->playing = 0;
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221 this->hidden->nextbuf = 0;
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222
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223 /* We're ready to rock and roll. :-) */
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224 return 1;
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225 }
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226
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227 static int
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228 DCAUD_Init(SDL_AudioDriverImpl * impl)
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229 {
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230 /* Set the function pointers */
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231 impl->OpenDevice = DCAUD_OpenDevice;
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232 impl->PlayDevice = DCAUD_PlayDevice;
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233 impl->WaitDevice = DCAUD_WaitDevice;
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234 impl->GetDeviceBuf = DCAUD_GetDeviceBuf;
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235 impl->CloseDevice = DCAUD_CloseDevice;
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236 impl->OnlyHasDefaultOutputDevice = 1;
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237
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238 return 1;
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239 }
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240
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241 AudioBootStrap DCAUD_bootstrap = {
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242 "dcaudio", "Dreamcast AICA audio", DCAUD_Init, 0
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243 };
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244
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1461
diff changeset
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