annotate decoders/voc.c @ 377:cbb15ecf423a

WinCE (PocketPC) patches from Tyler.
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 02 Jul 2002 03:58:24 +0000
parents f6475949cd59
children 9efb760c4a6b
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 * VOC decoder for SDL_sound.
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22 *
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23 * This driver handles Creative Labs VOC audio data...this is a legacy format,
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24 * but there's some game ports that could make use of such a decoder. Plus,
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25 * VOC is fairly straightforward to decode, so this is a more complex, but
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26 * still palatable example of an SDL_sound decoder. Y'know, in case the
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27 * RAW decoder didn't do it for you. :)
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28 *
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29 * This code was ripped from a decoder I had written for SDL_mixer, which was
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30 * largely ripped from sox v12.17.1's voc.c.
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31 *
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32 * SDL_mixer: http://www.libsdl.org/projects/SDL_mixer/
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33 * sox: http://www.freshmeat.net/projects/sox/
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34 *
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35 * Please see the file COPYING in the source's root directory.
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36 *
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37 * This file written by Ryan C. Gordon. (icculus@clutteredmind.org)
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38 */
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39
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40 #if HAVE_CONFIG_H
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41 # include <config.h>
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42 #endif
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43
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44 #ifdef SOUND_SUPPORTS_VOC
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45
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46 #include <stdio.h>
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47 #include <stdlib.h>
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48 #include <string.h>
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49
106
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50 #include "SDL_sound.h"
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51
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52 #define __SDL_SOUND_INTERNAL__
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53 #include "SDL_sound_internal.h"
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54
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55 static int VOC_init(void);
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56 static void VOC_quit(void);
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57 static int VOC_open(Sound_Sample *sample, const char *ext);
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58 static void VOC_close(Sound_Sample *sample);
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59 static Uint32 VOC_read(Sound_Sample *sample);
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60 static int VOC_rewind(Sound_Sample *sample);
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61 static int VOC_seek(Sound_Sample *sample, Uint32 ms);
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62
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63 static const char *extensions_voc[] = { "VOC", NULL };
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64 const Sound_DecoderFunctions __Sound_DecoderFunctions_VOC =
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65 {
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66 {
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67 extensions_voc,
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68 "Creative Labs Voice format",
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69 "Ryan C. Gordon <icculus@clutteredmind.org>",
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70 "http://www.icculus.org/SDL_sound/"
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71 },
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72
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73 VOC_init, /* init() method */
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74 VOC_quit, /* quit() method */
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75 VOC_open, /* open() method */
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76 VOC_close, /* close() method */
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77 VOC_read, /* read() method */
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78 VOC_rewind, /* rewind() method */
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79 VOC_seek /* seek() method */
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80 };
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81
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82
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83 /* Private data for VOC file */
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84 typedef struct vocstuff {
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85 Uint32 rest; /* bytes remaining in current block */
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86 Uint32 rate; /* rate code (byte) of this chunk */
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87 int silent; /* sound or silence? */
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88 Uint32 srate; /* rate code (byte) of silence */
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89 Uint32 blockseek; /* start of current output block */
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90 Uint32 samples; /* number of samples output */
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91 Uint32 size; /* word length of data */
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92 Uint8 channels; /* number of sound channels */
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93 int extended; /* Has an extended block been read? */
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94 Uint32 bufpos; /* byte position in internal->buffer. */
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95 Uint32 start_pos; /* offset to seek to in stream when rewinding. */
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96 } vs_t;
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97
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98 /* Size field */
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99 /* SJB: note that the 1st 3 are sometimes used as sizeof(type) */
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100 #define ST_SIZE_BYTE 1
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101 #define ST_SIZE_8BIT 1
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102 #define ST_SIZE_WORD 2
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103 #define ST_SIZE_16BIT 2
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104 #define ST_SIZE_DWORD 4
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105 #define ST_SIZE_32BIT 4
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106 #define ST_SIZE_FLOAT 5
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107 #define ST_SIZE_DOUBLE 6
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108 #define ST_SIZE_IEEE 7 /* IEEE 80-bit floats. */
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109
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110 /* Style field */
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111 #define ST_ENCODING_UNSIGNED 1 /* unsigned linear: Sound Blaster */
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112 #define ST_ENCODING_SIGN2 2 /* signed linear 2's comp: Mac */
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113 #define ST_ENCODING_ULAW 3 /* U-law signed logs: US telephony, SPARC */
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114 #define ST_ENCODING_ALAW 4 /* A-law signed logs: non-US telephony */
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115 #define ST_ENCODING_ADPCM 5 /* Compressed PCM */
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116 #define ST_ENCODING_IMA_ADPCM 6 /* Compressed PCM */
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117 #define ST_ENCODING_GSM 7 /* GSM 6.10 33-byte frame lossy compression */
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118
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119 #define VOC_TERM 0
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120 #define VOC_DATA 1
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121 #define VOC_CONT 2
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122 #define VOC_SILENCE 3
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123 #define VOC_MARKER 4
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124 #define VOC_TEXT 5
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125 #define VOC_LOOP 6
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126 #define VOC_LOOPEND 7
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127 #define VOC_EXTENDED 8
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128 #define VOC_DATA_16 9
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129
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130
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131 static int VOC_init(void)
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132 {
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133 return(1); /* always succeeds. */
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134 } /* VOC_init */
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135
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136
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137 static void VOC_quit(void)
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138 {
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139 /* it's a no-op. */
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140 } /* VOC_quit */
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141
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142
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143 static inline int voc_check_header(SDL_RWops *src)
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144 {
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145 /* VOC magic header */
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146 Uint8 signature[20]; /* "Creative Voice File\032" */
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147 Uint16 datablockofs;
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148
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149 if (SDL_RWread(src, signature, sizeof (signature), 1) != 1)
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150 return(0);
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151
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152 if (memcmp(signature, "Creative Voice File\032", sizeof (signature)) != 0) {
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153 Sound_SetError("Unrecognized file type (not VOC)");
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154 return(0);
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155 }
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156
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157 /* get the offset where the first datablock is located */
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parents:
diff changeset
158 if (SDL_RWread(src, &datablockofs, sizeof (Uint16), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
159 return(0);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
160
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
161 datablockofs = SDL_SwapLE16(datablockofs);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
162
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
163 if (SDL_RWseek(src, datablockofs, SEEK_SET) != datablockofs)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
164 return(0);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
165
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
166 return(1); /* success! */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
167 } /* voc_check_header */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
168
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
169 /* !!! FIXME : Add a flag to vs_t that distinguishes EOF and Error conditions. */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
170
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
171 /* Read next block header, save info, leave position at start of data */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
172 static int voc_get_block(Sound_Sample *sample)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
173 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
174 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
175 SDL_RWops *src = internal->rw;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
176 vs_t *v = (vs_t *) internal->decoder_private;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
177 Uint8 bits24[3];
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
178 Uint8 uc, block;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
179 Uint32 sblen;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
180 Uint16 new_rate_short;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
181 Uint32 new_rate_long;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
182 Uint8 trash[6];
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
183 Uint16 period;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
184 int i;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
185
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
186 v->silent = 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
187 while (v->rest == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
188 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
189 if (SDL_RWread(src, &block, sizeof (block), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
190 return 1; /* assume that's the end of the file. */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
191
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
192 if (block == VOC_TERM)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
193 return 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
194
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
195 if (SDL_RWread(src, bits24, sizeof (bits24), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
196 return 1; /* assume that's the end of the file. */
62
b13fafb976be Changed _D macro to DBGSND.
Ryan C. Gordon <icculus@icculus.org>
parents: 47
diff changeset
197
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
198 /* Size is an 24-bit value. Ugh. */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
199 sblen = ( (bits24[0]) | (bits24[1] << 8) | (bits24[2] << 16) );
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
200
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
201 switch(block)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
202 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
203 case VOC_DATA:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
204 if (SDL_RWread(src, &uc, sizeof (uc), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
205 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
206
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
207 /* When DATA block preceeded by an EXTENDED */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
208 /* block, the DATA blocks rate value is invalid */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
209 if (!v->extended)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
210 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
211 if (uc == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
212 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
213 Sound_SetError("VOC Sample rate is zero?");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
214 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
215 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
216
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
217 if ((v->rate != -1) && (uc != v->rate))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
218 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
219 Sound_SetError("VOC sample rate codes differ");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
220 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
221 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
222
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
223 v->rate = uc;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
224 sample->actual.rate = 1000000.0/(256 - v->rate);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
225 v->channels = 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
226 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
227
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
228 if (SDL_RWread(src, &uc, sizeof (uc), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
229 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
230
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
231 if (uc != 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
232 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
233 Sound_SetError("VOC decoder only interprets 8-bit data");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
234 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
235 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
236
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
237 v->extended = 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
238 v->rest = sblen - 2;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
239 v->size = ST_SIZE_BYTE;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
240 return 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
241
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
242 case VOC_DATA_16:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
243 if (SDL_RWread(src, &new_rate_long, sizeof (new_rate_long), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
244 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
245 new_rate_long = SDL_SwapLE32(new_rate_long);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
246 if (new_rate_long == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
247 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
248 Sound_SetError("VOC Sample rate is zero?");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
249 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
250 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
251 if ((v->rate != -1) && (new_rate_long != v->rate))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
252 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
253 Sound_SetError("VOC sample rate codes differ");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
254 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
255 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
256 v->rate = new_rate_long;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
257 sample->actual.rate = new_rate_long;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
258
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
259 if (SDL_RWread(src, &uc, sizeof (uc), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
260 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
261
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
262 switch (uc)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
263 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
264 case 8: v->size = ST_SIZE_BYTE; break;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
265 case 16: v->size = ST_SIZE_WORD; break;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
266 default:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
267 Sound_SetError("VOC with unknown data size");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
268 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
269 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
270
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
271 if (SDL_RWread(src, &v->channels, sizeof (Uint8), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
272 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
273
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
274 if (SDL_RWread(src, trash, sizeof (Uint8), 6) != 6)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
275 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
276
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
277 v->rest = sblen - 12;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
278 return 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
279
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
280 case VOC_CONT:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
281 v->rest = sblen;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
282 return 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
283
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
284 case VOC_SILENCE:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
285 if (SDL_RWread(src, &period, sizeof (period), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
286 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
287 period = SDL_SwapLE16(period);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
288
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
289 if (SDL_RWread(src, &uc, sizeof (uc), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
290 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
291 if (uc == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
292 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
293 Sound_SetError("VOC silence sample rate is zero");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
294 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
295 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
296
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
297 /*
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
298 * Some silence-packed files have gratuitously
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
299 * different sample rate codes in silence.
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
300 * Adjust period.
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
301 */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
302 if ((v->rate != -1) && (uc != v->rate))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
303 period = (period * (256 - uc))/(256 - v->rate);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
304 else
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
305 v->rate = uc;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
306 v->rest = period;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
307 v->silent = 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
308 return 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
309
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
310 case VOC_LOOP:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
311 case VOC_LOOPEND:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
312 for(i = 0; i < sblen; i++) /* skip repeat loops. */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
313 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
314 if (SDL_RWread(src, trash, sizeof (Uint8), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
315 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
316 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
317 break;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
318
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
319 case VOC_EXTENDED:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
320 /* An Extended block is followed by a data block */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
321 /* Set this byte so we know to use the rate */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
322 /* value from the extended block and not the */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
323 /* data block. */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
324 v->extended = 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
325 if (SDL_RWread(src, &new_rate_short, sizeof (new_rate_short), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
326 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
327 new_rate_short = SDL_SwapLE16(new_rate_short);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
328 if (new_rate_short == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
329 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
330 Sound_SetError("VOC sample rate is zero");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
331 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
332 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
333 if ((v->rate != -1) && (new_rate_short != v->rate))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
334 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
335 Sound_SetError("VOC sample rate codes differ");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
336 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
337 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
338 v->rate = new_rate_short;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
339
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
340 if (SDL_RWread(src, &uc, sizeof (uc), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
341 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
342
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
343 if (uc != 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
344 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
345 Sound_SetError("VOC decoder only interprets 8-bit data");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
346 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
347 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
348
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
349 if (SDL_RWread(src, &uc, sizeof (uc), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
350 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
351
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
352 if (uc)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
353 sample->actual.channels = 2; /* Stereo */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
354 /* Needed number of channels before finishing
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
355 compute for rate */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
356 sample->actual.rate =
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
357 (256000000L/(65536L - v->rate)) / sample->actual.channels;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
358 /* An extended block must be followed by a data */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
359 /* block to be valid so loop back to top so it */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
360 /* can be grabed. */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
361 continue;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
362
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
363 case VOC_MARKER:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
364 if (SDL_RWread(src, trash, sizeof (Uint8), 2) != 2)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
365 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
366
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
367 /* Falling! Falling! */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
368
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
369 default: /* text block or other krapola. */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
370 for(i = 0; i < sblen; i++)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
371 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
372 if (SDL_RWread(src, &trash, sizeof (Uint8), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
373 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
374 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
375
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
376 if (block == VOC_TEXT)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
377 continue; /* get next block */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
378 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
379 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
380
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
381 return 1;
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
382 } /* voc_get_block */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
383
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
384
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
385 static int voc_read_waveform(Sound_Sample *sample, int fill_buf, Uint32 max)
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
386 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
387 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
388 SDL_RWops *src = internal->rw;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
389 vs_t *v = (vs_t *) internal->decoder_private;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
390 int done = 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
391 Uint8 silence = 0x80;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
392 Uint8 *buf = internal->buffer;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
393
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
394 if (v->rest == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
395 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
396 if (!voc_get_block(sample))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
397 return 0;
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
398 } /* if */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
399
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
400 if (v->rest == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
401 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
402
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
403 max = (v->rest < max) ? v->rest : max;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
404
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
405 if (v->silent)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
406 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
407 if (v->size == ST_SIZE_WORD)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
408 silence = 0x00;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
409
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
410 /* Fill in silence */
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
411 if (fill_buf)
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
412 memset(buf + v->bufpos, silence, max);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
413
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
414 done = max;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
415 v->rest -= done;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
416 } /* if */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
417
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
418 else
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
419 {
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
420 if (fill_buf)
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
421 done = SDL_RWread(src, buf + v->bufpos, 1, max);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
422 else
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
423 {
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
424 int cur, rc;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
425 cur = SDL_RWtell(src);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
426 if (cur >= 0)
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
427 {
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
428 rc = SDL_RWseek(src, max, SEEK_CUR);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
429 if (rc >= 0)
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
430 done = rc - cur;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
431 } /* if */
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
432 } /* else */
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
433
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
434 v->rest -= done;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
435 v->bufpos += done;
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
436 } /* else */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
437
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
438 return done;
22
f6e679afe88b Byte ordering fix, changed voc_read to voc_read_waveform, and cleaned up
Ryan C. Gordon <icculus@icculus.org>
parents: 14
diff changeset
439 } /* voc_read_waveform */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
440
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
441
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
442 static int VOC_open(Sound_Sample *sample, const char *ext)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
443 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
444 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
445 vs_t *v = NULL;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
446
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
447 if (!voc_check_header(internal->rw))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
448 return(0);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
449
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
450 v = (vs_t *) malloc(sizeof (vs_t));
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
451 BAIL_IF_MACRO(v == NULL, ERR_OUT_OF_MEMORY, 0);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
452 memset(v, '\0', sizeof (vs_t));
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
453 internal->decoder_private = v;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
454
224
1bafef18dabf Implemented rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents: 221
diff changeset
455 v->start_pos = SDL_RWtell(internal->rw);
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
456 v->rate = -1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
457 if (!voc_get_block(sample))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
458 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
459 free(v);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
460 return(0);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
461 } /* if */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
462
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
463 if (v->rate == -1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
464 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
465 Sound_SetError("VOC data had no sound!");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
466 free(v);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
467 return(0);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
468 } /* if */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
469
62
b13fafb976be Changed _D macro to DBGSND.
Ryan C. Gordon <icculus@icculus.org>
parents: 47
diff changeset
470 SNDDBG(("VOC: Accepting data stream.\n"));
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
471 sample->actual.format = (v->size == ST_SIZE_WORD) ? AUDIO_S16LSB:AUDIO_U8;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
472 sample->actual.channels = v->channels;
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
473 sample->flags = SOUND_SAMPLEFLAG_CANSEEK;
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
474 return(1);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
475 } /* VOC_open */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
476
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
477
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
478 static void VOC_close(Sound_Sample *sample)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
479 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
480 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
481 free(internal->decoder_private);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
482 } /* VOC_close */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
483
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
484
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
485 static Uint32 VOC_read(Sound_Sample *sample)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
486 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
487 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
488 vs_t *v = (vs_t *) internal->decoder_private;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
489
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
490 v->bufpos = 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
491 while (v->bufpos < internal->buffer_size)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
492 {
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
493 Uint32 rc = voc_read_waveform(sample, 1, internal->buffer_size);
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
494 if (rc == 0) /* !!! FIXME: Could be an error... */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
495 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
496 sample->flags |= SOUND_SAMPLEFLAG_EOF;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
497 break;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
498 } /* if */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
499
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
500 if (!voc_get_block(sample))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
501 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
502 sample->flags |= SOUND_SAMPLEFLAG_ERROR;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
503 break;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
504 } /* if */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
505 } /* while */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
506
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
507 return(v->bufpos);
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Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
508 } /* VOC_read */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
509
221
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
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diff changeset
510
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
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511 static int VOC_rewind(Sound_Sample *sample)
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parents: 184
diff changeset
512 {
224
1bafef18dabf Implemented rewind method.
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diff changeset
513 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
1bafef18dabf Implemented rewind method.
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parents: 221
diff changeset
514 vs_t *v = (vs_t *) internal->decoder_private;
1bafef18dabf Implemented rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents: 221
diff changeset
515 int rc = SDL_RWseek(internal->rw, v->start_pos, SEEK_SET);
1bafef18dabf Implemented rewind method.
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diff changeset
516 BAIL_IF_MACRO(rc != v->start_pos, ERR_IO_ERROR, 0);
1bafef18dabf Implemented rewind method.
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diff changeset
517 v->rest = 0;
1bafef18dabf Implemented rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents: 221
diff changeset
518 return(1);
221
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
519 } /* VOC_rewind */
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parents: 184
diff changeset
520
306
c97be6e1bd27 Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents: 301
diff changeset
521
c97be6e1bd27 Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents: 301
diff changeset
522 static int VOC_seek(Sound_Sample *sample, Uint32 ms)
c97be6e1bd27 Added framework for Sound_Seek() support.
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parents: 301
diff changeset
523 {
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
524 /*
f6475949cd59 Implemented seek method.
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diff changeset
525 * VOCs don't lend themselves well to seeking, since you have to
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
526 * parse each section, which is an arbitrary size. The best we can do
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
527 * is rewind, set a flag saying not to write the waveforms to a buffer,
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
528 * and decode to the point that we want. Ugh. Fortunately, there's
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
529 * really no such thing as a large VOC, due to the era and hardware that
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
530 * spawned them, so even though this is inefficient, this is still a
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
531 * relatively fast operation in most cases.
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
532 */
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
533
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
534 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
535 vs_t *v = (vs_t *) internal->decoder_private;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
536 int offset = __Sound_convertMsToBytePos(&sample->actual, ms);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
537 int origpos = SDL_RWtell(internal->rw);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
538 int origrest = v->rest;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
539
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
540 BAIL_IF_MACRO(!VOC_rewind(sample), NULL, 0);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
541
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
542 v->bufpos = 0;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
543
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
544 while (offset > 0)
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
545 {
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
546 Uint32 rc = voc_read_waveform(sample, 0, offset);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
547 if ( (rc == 0) || (!voc_get_block(sample)) )
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
548 {
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
549 SDL_RWseek(internal->rw, origpos, SEEK_SET);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
550 v->rest = origrest;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
551 return(0);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
552 } /* if */
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
553
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
554 offset -= rc;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
555 } /* while */
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
556
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
557 return(1);
306
c97be6e1bd27 Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents: 301
diff changeset
558 } /* VOC_seek */
c97be6e1bd27 Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents: 301
diff changeset
559
64
40006625142a Changes in preparation of autoconf support.
Ryan C. Gordon <icculus@icculus.org>
parents: 62
diff changeset
560 #endif /* SOUND_SUPPORTS_VOC */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
561
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
562 /* end of voc.c ... */