annotate decoders/au.c @ 562:7e08477b0fc1

MP3 decoder upgrade work. Ripped out SMPEG and mpglib support, replaced it with "mpg123.c" and libmpg123. libmpg123 is a much better version of mpglib, so it should solve all the problems about MP3's not seeking, or most modern MP3's not playing at all, etc. Since you no longer have to make a tradeoff with SMPEG for features, and SMPEG is basically rotting, I removed it from the project. There is still work to be done with libmpg123...there are MMX, 3DNow, SSE, Altivec, etc decoders which we don't have enabled at the moment, and the build system could use some work to make this compile more cleanly, etc. Still: huge win.
author Ryan C. Gordon <icculus@icculus.org>
date Fri, 30 Jan 2009 02:44:47 -0500
parents 2e8907ff98e9
children
rev   line source
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1 /*
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2 * SDL_sound -- An abstract sound format decoding API.
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3 * Copyright (C) 2001 Ryan C. Gordon.
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18 */
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19
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20 /*
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21 * Sun/NeXT .au decoder for SDL_sound.
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22 * Formats supported: 8 and 16 bit linear PCM, 8 bit µ-law.
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23 * Files without valid header are assumed to be 8 bit µ-law, 8kHz, mono.
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24 *
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25 * Please see the file LICENSE.txt in the source's root directory.
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26 *
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27 * This file written by Mattias Engdegård. (f91-men@nada.kth.se)
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28 */
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29
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30 #if HAVE_CONFIG_H
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31 # include <config.h>
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32 #endif
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33
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34 #ifdef SOUND_SUPPORTS_AU
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35
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36 #include <stdio.h>
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37 #include <stdlib.h>
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38 #include <string.h>
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39
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40 #include "SDL_sound.h"
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41
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42 #define __SDL_SOUND_INTERNAL__
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43 #include "SDL_sound_internal.h"
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44
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45 static int AU_init(void);
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46 static void AU_quit(void);
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47 static int AU_open(Sound_Sample *sample, const char *ext);
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48 static void AU_close(Sound_Sample *sample);
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49 static Uint32 AU_read(Sound_Sample *sample);
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50 static int AU_rewind(Sound_Sample *sample);
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51 static int AU_seek(Sound_Sample *sample, Uint32 ms);
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52
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53 /*
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54 * Sometimes the extension ".snd" is used for these files (mostly on the NeXT),
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55 * and the magic number comes from this. However it may clash with other
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56 * formats and is somewhat of an anachronism, so only .au is used here.
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57 */
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58 static const char *extensions_au[] = { "AU", NULL };
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59 const Sound_DecoderFunctions __Sound_DecoderFunctions_AU =
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60 {
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61 {
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62 extensions_au,
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63 "Sun/NeXT audio file format",
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64 "Mattias Engdegård <f91-men@nada.kth.se>",
213
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65 "http://www.icculus.org/SDL_sound/"
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66 },
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67
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68 AU_init, /* init() method */
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69 AU_quit, /* quit() method */
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70 AU_open, /* open() method */
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71 AU_close, /* close() method */
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72 AU_read, /* read() method */
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73 AU_rewind, /* rewind() method */
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74 AU_seek /* seek() method */
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75 };
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76
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77 /* no init/deinit needed */
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78 static int AU_init(void)
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79 {
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80 return(1);
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81 } /* AU_init */
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82
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83 static void AU_quit(void)
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84 {
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85 /* no-op. */
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86 } /* AU_quit */
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87
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88 struct au_file_hdr
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89 {
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90 Uint32 magic;
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91 Uint32 hdr_size;
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92 Uint32 data_size;
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93 Uint32 encoding;
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94 Uint32 sample_rate;
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95 Uint32 channels;
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96 };
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97
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98 #define HDR_SIZE 24
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99
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100 enum
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101 {
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102 AU_ENC_ULAW_8 = 1, /* 8-bit ISDN µ-law */
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103 AU_ENC_LINEAR_8 = 2, /* 8-bit linear PCM */
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104 AU_ENC_LINEAR_16 = 3, /* 16-bit linear PCM */
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105
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106 /* the rest are unsupported (I have never seen them in the wild) */
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107 AU_ENC_LINEAR_24 = 4, /* 24-bit linear PCM */
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108 AU_ENC_LINEAR_32 = 5, /* 32-bit linear PCM */
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109 AU_ENC_FLOAT = 6, /* 32-bit IEEE floating point */
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110 AU_ENC_DOUBLE = 7, /* 64-bit IEEE floating point */
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111 /* more Sun formats, not supported either */
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112 AU_ENC_ADPCM_G721 = 23,
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113 AU_ENC_ADPCM_G722 = 24,
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114 AU_ENC_ADPCM_G723_3 = 25,
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115 AU_ENC_ADPCM_G723_5 = 26,
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116 AU_ENC_ALAW_8 = 27
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117 };
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118
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119 struct audec
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120 {
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121 Uint32 total;
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122 Uint32 remaining;
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123 Uint32 start_offset;
213
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124 int encoding;
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125 };
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126
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127
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128 /*
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129 * Read in the AU header from disk. This makes this process safe
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130 * regardless of the processor's byte order or how the au_file_hdr
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131 * structure is packed.
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132 */
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133 static int read_au_header(SDL_RWops *rw, struct au_file_hdr *hdr)
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134 {
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135 if (SDL_RWread(rw, &hdr->magic, sizeof (hdr->magic), 1) != 1)
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136 return(0);
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137 hdr->magic = SDL_SwapBE32(hdr->magic);
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138
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139 if (SDL_RWread(rw, &hdr->hdr_size, sizeof (hdr->hdr_size), 1) != 1)
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140 return(0);
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141 hdr->hdr_size = SDL_SwapBE32(hdr->hdr_size);
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142
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143 if (SDL_RWread(rw, &hdr->data_size, sizeof (hdr->data_size), 1) != 1)
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144 return(0);
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145 hdr->data_size = SDL_SwapBE32(hdr->data_size);
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146
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147 if (SDL_RWread(rw, &hdr->encoding, sizeof (hdr->encoding), 1) != 1)
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148 return(0);
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149 hdr->encoding = SDL_SwapBE32(hdr->encoding);
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150
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151 if (SDL_RWread(rw, &hdr->sample_rate, sizeof (hdr->sample_rate), 1) != 1)
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152 return(0);
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153 hdr->sample_rate = SDL_SwapBE32(hdr->sample_rate);
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154
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
155 if (SDL_RWread(rw, &hdr->channels, sizeof (hdr->channels), 1) != 1)
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
156 return(0);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
157 hdr->channels = SDL_SwapBE32(hdr->channels);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
158
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
159 return(1);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
160 } /* read_au_header */
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
161
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
162
257
7c4f6ee02cd0 Changed magic number to be bigendian.
Ryan C. Gordon <icculus@icculus.org>
parents: 221
diff changeset
163 #define AU_MAGIC 0x2E736E64 /* ".snd", in ASCII (bigendian number) */
213
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
164
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
165 static int AU_open(Sound_Sample *sample, const char *ext)
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
166 {
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
167 Sound_SampleInternal *internal = sample->opaque;
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
168 SDL_RWops *rw = internal->rw;
474
c66080364dff Most decoders now report total sample play time, now. Technically, this
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
169 int skip, hsize, i, bytes_per_second;
213
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
170 struct au_file_hdr hdr;
330
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
171 struct audec *dec;
213
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
172 char c;
330
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
173
387
fb519e6028e3 Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
174 /* read_au_header() will do byte order swapping. */
fb519e6028e3 Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
175 BAIL_IF_MACRO(!read_au_header(rw, &hdr), "AU: bad header", 0);
330
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
176
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
177 dec = malloc(sizeof *dec);
213
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
178 BAIL_IF_MACRO(dec == NULL, ERR_OUT_OF_MEMORY, 0);
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
179 internal->decoder_private = dec;
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
180
330
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
181 if (hdr.magic == AU_MAGIC)
213
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
182 {
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
183 /* valid magic */
330
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
184 dec->encoding = hdr.encoding;
213
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
185 switch(dec->encoding)
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
186 {
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
187 case AU_ENC_ULAW_8:
536
8a814bbbedfa Merged r544:545 from branches/stable-1.0: converted to UTF-8 encoding.
Ryan C. Gordon <icculus@icculus.org>
parents: 477
diff changeset
188 /* Convert 8-bit µ-law to 16-bit linear on the fly. This is
213
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
189 slightly wasteful if the audio driver must convert them
536
8a814bbbedfa Merged r544:545 from branches/stable-1.0: converted to UTF-8 encoding.
Ryan C. Gordon <icculus@icculus.org>
parents: 477
diff changeset
190 back, but µ-law only devices are rare (mostly _old_ Suns) */
213
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
191 sample->actual.format = AUDIO_S16SYS;
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
192 break;
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
193
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
194 case AU_ENC_LINEAR_8:
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
195 sample->actual.format = AUDIO_S8;
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
196 break;
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
197
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
198 case AU_ENC_LINEAR_16:
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
199 sample->actual.format = AUDIO_S16MSB;
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
200 break;
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
201
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
202 default:
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
203 free(dec);
387
fb519e6028e3 Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
204 BAIL_MACRO("AU: Unsupported .au encoding", 0);
217
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents: 213
diff changeset
205 } /* switch */
213
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
206
330
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
207 sample->actual.rate = hdr.sample_rate;
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
208 sample->actual.channels = hdr.channels;
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
209 dec->remaining = hdr.data_size;
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
210 hsize = hdr.hdr_size;
213
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
211
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
212 /* skip remaining part of header (input may be unseekable) */
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
213 for (i = HDR_SIZE; i < hsize; i++)
330
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
214 {
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
215 if (SDL_RWread(rw, &c, 1, 1) != 1)
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
216 {
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
217 free(dec);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
218 BAIL_MACRO(ERR_IO_ERROR, 0);
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
219 } /* if */
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
220 } /* for */
217
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents: 213
diff changeset
221 } /* if */
213
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
222
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
223 else if (__Sound_strcasecmp(ext, "au") == 0)
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
224 {
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
225 /*
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
226 * A number of files in the wild have the .au extension but no valid
536
8a814bbbedfa Merged r544:545 from branches/stable-1.0: converted to UTF-8 encoding.
Ryan C. Gordon <icculus@icculus.org>
parents: 477
diff changeset
227 * header; these are traditionally assumed to be 8kHz µ-law. Handle
213
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
228 * them here only if the extension is recognized.
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
229 */
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
230
536
8a814bbbedfa Merged r544:545 from branches/stable-1.0: converted to UTF-8 encoding.
Ryan C. Gordon <icculus@icculus.org>
parents: 477
diff changeset
231 SNDDBG(("AU: Invalid header, assuming raw 8kHz µ-law.\n"));
213
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
232 /* if seeking fails, we lose 24 samples. big deal */
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
233 SDL_RWseek(rw, -HDR_SIZE, SEEK_CUR);
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
234 dec->encoding = AU_ENC_ULAW_8;
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
235 dec->remaining = (Uint32)-1; /* no limit */
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
236 sample->actual.format = AUDIO_S16SYS;
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
237 sample->actual.rate = 8000;
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
238 sample->actual.channels = 1;
217
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents: 213
diff changeset
239 } /* else if */
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents: 213
diff changeset
240
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents: 213
diff changeset
241 else
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents: 213
diff changeset
242 {
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents: 213
diff changeset
243 free(dec);
387
fb519e6028e3 Changed all the Sound_SetError() calls to __Sound_SetError (or BAIL*_MACRO)
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
244 BAIL_MACRO("AU: Not an .AU stream.", 0);
474
c66080364dff Most decoders now report total sample play time, now. Technically, this
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
245 } /* else */
c66080364dff Most decoders now report total sample play time, now. Technically, this
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
246
c66080364dff Most decoders now report total sample play time, now. Technically, this
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
247 bytes_per_second = ( ( dec->encoding == AU_ENC_LINEAR_16 ) ? 2 : 1 )
c66080364dff Most decoders now report total sample play time, now. Technically, this
Ryan C. Gordon <icculus@icculus.org>
parents: 387
diff changeset
248 * sample->actual.rate * sample->actual.channels ;
477
3e705c9180e5 Fixed binary compatibility, added Sound_GetDuration().
Ryan C. Gordon <icculus@icculus.org>
parents: 474
diff changeset
249 internal->total_time = ((dec->remaining == -1) ? (-1) :
3e705c9180e5 Fixed binary compatibility, added Sound_GetDuration().
Ryan C. Gordon <icculus@icculus.org>
parents: 474
diff changeset
250 ( ( dec->remaining / bytes_per_second ) * 1000 ) +
3e705c9180e5 Fixed binary compatibility, added Sound_GetDuration().
Ryan C. Gordon <icculus@icculus.org>
parents: 474
diff changeset
251 ( ( dec->remaining % bytes_per_second ) * 1000 /
3e705c9180e5 Fixed binary compatibility, added Sound_GetDuration().
Ryan C. Gordon <icculus@icculus.org>
parents: 474
diff changeset
252 bytes_per_second ) );
213
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
253
330
a81976ed5df7 Cleanups for robustness, potentially buggy seek method implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
254 sample->flags = SOUND_SAMPLEFLAG_CANSEEK;
221
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 217
diff changeset
255 dec->total = dec->remaining;
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 217
diff changeset
256 dec->start_offset = SDL_RWtell(rw);
213
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
257
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
258 SNDDBG(("AU: Accepting data stream.\n"));
217
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents: 213
diff changeset
259 return(1);
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents: 213
diff changeset
260 } /* AU_open */
213
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
261
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
262
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
263 static void AU_close(Sound_Sample *sample)
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
264 {
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
265 Sound_SampleInternal *internal = sample->opaque;
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
266 free(internal->decoder_private);
217
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents: 213
diff changeset
267 } /* AU_close */
9bab949e2318 Fixed memory leak I introduced, mangled coding style some more. :)
Ryan C. Gordon <icculus@icculus.org>
parents: 213
diff changeset
268
213
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
269
536
8a814bbbedfa Merged r544:545 from branches/stable-1.0: converted to UTF-8 encoding.
Ryan C. Gordon <icculus@icculus.org>
parents: 477
diff changeset
270 /* table to convert from µ-law encoding to signed 16-bit samples,
213
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
271 generated by a throwaway perl script */
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
272 static Sint16 ulaw_to_linear[256] = {
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
273 -32124,-31100,-30076,-29052,-28028,-27004,-25980,-24956,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
274 -23932,-22908,-21884,-20860,-19836,-18812,-17788,-16764,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
275 -15996,-15484,-14972,-14460,-13948,-13436,-12924,-12412,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
276 -11900,-11388,-10876,-10364, -9852, -9340, -8828, -8316,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
277 -7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
278 -5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
279 -3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
280 -2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
281 -1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
282 -1372, -1308, -1244, -1180, -1116, -1052, -988, -924,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
283 -876, -844, -812, -780, -748, -716, -684, -652,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
284 -620, -588, -556, -524, -492, -460, -428, -396,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
285 -372, -356, -340, -324, -308, -292, -276, -260,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
286 -244, -228, -212, -196, -180, -164, -148, -132,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
287 -120, -112, -104, -96, -88, -80, -72, -64,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
288 -56, -48, -40, -32, -24, -16, -8, 0,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
289 32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
290 23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
291 15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
292 11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
293 7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
294 5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
295 3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
296 2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
297 1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
298 1372, 1308, 1244, 1180, 1116, 1052, 988, 924,
948b62500a54 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
299 876, 844, 812, 780, 748, 716, 684, 652,
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300 620, 588, 556, 524, 492, 460, 428, 396,
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301 372, 356, 340, 324, 308, 292, 276, 260,
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302 244, 228, 212, 196, 180, 164, 148, 132,
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303 120, 112, 104, 96, 88, 80, 72, 64,
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304 56, 48, 40, 32, 24, 16, 8, 0
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305 };
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306
217
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307
213
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308 static Uint32 AU_read(Sound_Sample *sample)
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309 {
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310 int ret;
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311 Sound_SampleInternal *internal = sample->opaque;
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312 struct audec *dec = internal->decoder_private;
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313 int maxlen;
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314 Uint8 *buf;
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315
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316 maxlen = internal->buffer_size;
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317 buf = internal->buffer;
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318 if (dec->encoding == AU_ENC_ULAW_8)
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319 {
536
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320 /* We read µ-law samples into the second half of the buffer, so
213
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321 we can expand them to 16-bit samples afterwards */
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322 maxlen >>= 1;
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323 buf += maxlen;
217
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324 } /* if */
213
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325
221
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326 if (maxlen > dec->remaining)
213
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327 maxlen = dec->remaining;
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328 ret = SDL_RWread(internal->rw, buf, 1, maxlen);
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329 if (ret == 0)
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330 sample->flags |= SOUND_SAMPLEFLAG_EOF;
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331 else if (ret == -1)
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332 sample->flags |= SOUND_SAMPLEFLAG_ERROR;
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333 else
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334 {
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335 dec->remaining -= ret;
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336 if (ret < maxlen)
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337 sample->flags |= SOUND_SAMPLEFLAG_EAGAIN;
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338
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Ryan C. Gordon <icculus@icculus.org>
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339 if (dec->encoding == AU_ENC_ULAW_8)
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Ryan C. Gordon <icculus@icculus.org>
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340 {
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Ryan C. Gordon <icculus@icculus.org>
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341 int i;
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342 Sint16 *dst = internal->buffer;
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Ryan C. Gordon <icculus@icculus.org>
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343 for (i = 0; i < ret; i++)
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Ryan C. Gordon <icculus@icculus.org>
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344 dst[i] = ulaw_to_linear[buf[i]];
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345 ret <<= 1; /* return twice as much as read */
217
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346 } /* if */
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347 } /* else */
213
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348
217
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349 return(ret);
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350 } /* AU_read */
213
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351
221
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diff changeset
352
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353 static int AU_rewind(Sound_Sample *sample)
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354 {
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355 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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356 struct audec *dec = (struct audec *) internal->decoder_private;
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357 int rc = SDL_RWseek(internal->rw, dec->start_offset, SEEK_SET);
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358 BAIL_IF_MACRO(rc != dec->start_offset, ERR_IO_ERROR, 0);
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359 dec->remaining = dec->total;
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360 return(1);
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361 } /* AU_rewind */
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362
306
c97be6e1bd27 Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
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363
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Ryan C. Gordon <icculus@icculus.org>
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364 static int AU_seek(Sound_Sample *sample, Uint32 ms)
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365 {
330
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366 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
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367 struct audec *dec = (struct audec *) internal->decoder_private;
331
e683cb99f88f Fixed seek implementation.
Ryan C. Gordon <icculus@icculus.org>
parents: 330
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368 int offset = __Sound_convertMsToBytePos(&sample->actual, ms);
330
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parents: 306
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369 int rc;
331
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Ryan C. Gordon <icculus@icculus.org>
parents: 330
diff changeset
370 int pos;
330
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
371
331
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Ryan C. Gordon <icculus@icculus.org>
parents: 330
diff changeset
372 if (dec->encoding == AU_ENC_ULAW_8)
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Ryan C. Gordon <icculus@icculus.org>
parents: 330
diff changeset
373 offset >>= 1; /* halve the byte offset for compression. */
330
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parents: 306
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374
331
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Ryan C. Gordon <icculus@icculus.org>
parents: 330
diff changeset
375 pos = (int) (dec->start_offset + offset);
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Ryan C. Gordon <icculus@icculus.org>
parents: 330
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376 rc = SDL_RWseek(internal->rw, pos, SEEK_SET);
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Ryan C. Gordon <icculus@icculus.org>
parents: 330
diff changeset
377 BAIL_IF_MACRO(rc != pos, ERR_IO_ERROR, 0);
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Ryan C. Gordon <icculus@icculus.org>
parents: 330
diff changeset
378 dec->remaining = dec->total - offset;
330
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Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
379 return(1);
306
c97be6e1bd27 Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
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380 } /* AU_seek */
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
381
213
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382 #endif /* SOUND_SUPPORTS_AU */
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Ryan C. Gordon <icculus@icculus.org>
parents:
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383