annotate decoders/voc.c @ 385:9efb760c4a6b

FIXME removal and cleanups.
author Ryan C. Gordon <icculus@icculus.org>
date Fri, 05 Jul 2002 22:32:54 +0000
parents cbb15ecf423a
children fb519e6028e3
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 int error; /* error condition (as opposed to EOF). */
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97 } vs_t;
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98
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99
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100 /* Size field */
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101 /* SJB: note that the 1st 3 are sometimes used as sizeof(type) */
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102 #define ST_SIZE_BYTE 1
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103 #define ST_SIZE_8BIT 1
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104 #define ST_SIZE_WORD 2
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105 #define ST_SIZE_16BIT 2
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106 #define ST_SIZE_DWORD 4
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107 #define ST_SIZE_32BIT 4
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108 #define ST_SIZE_FLOAT 5
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109 #define ST_SIZE_DOUBLE 6
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110 #define ST_SIZE_IEEE 7 /* IEEE 80-bit floats. */
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111
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112 /* Style field */
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113 #define ST_ENCODING_UNSIGNED 1 /* unsigned linear: Sound Blaster */
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114 #define ST_ENCODING_SIGN2 2 /* signed linear 2's comp: Mac */
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115 #define ST_ENCODING_ULAW 3 /* U-law signed logs: US telephony, SPARC */
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116 #define ST_ENCODING_ALAW 4 /* A-law signed logs: non-US telephony */
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117 #define ST_ENCODING_ADPCM 5 /* Compressed PCM */
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118 #define ST_ENCODING_IMA_ADPCM 6 /* Compressed PCM */
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119 #define ST_ENCODING_GSM 7 /* GSM 6.10 33-byte frame lossy compression */
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120
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121 #define VOC_TERM 0
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122 #define VOC_DATA 1
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123 #define VOC_CONT 2
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124 #define VOC_SILENCE 3
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125 #define VOC_MARKER 4
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126 #define VOC_TEXT 5
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127 #define VOC_LOOP 6
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128 #define VOC_LOOPEND 7
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129 #define VOC_EXTENDED 8
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130 #define VOC_DATA_16 9
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131
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132
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133 static int VOC_init(void)
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134 {
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135 return(1); /* always succeeds. */
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136 } /* VOC_init */
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137
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138
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139 static void VOC_quit(void)
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140 {
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141 /* it's a no-op. */
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142 } /* VOC_quit */
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143
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144
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145 static inline int voc_readbytes(SDL_RWops *src, vs_t *v, void *p, int size)
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146 {
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147 if (SDL_RWread(src, p, size, 1) != 1)
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148 {
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149 Sound_SetError("VOC: i/o error");
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150 v->error = 1;
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151 return 0;
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152 } /* if */
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153
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154 return(1);
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155 } /* voc_readbytes */
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parents: 377
diff changeset
156
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
157
301
ca43129df299 Visual C fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 224
diff changeset
158 static inline int voc_check_header(SDL_RWops *src)
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
159 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
160 /* VOC magic header */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
161 Uint8 signature[20]; /* "Creative Voice File\032" */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
162 Uint16 datablockofs;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
163 vs_t v; /* dummy struct for voc_readbytes */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
164
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
165 if (!voc_readbytes(src, &v, signature, sizeof (signature)))
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
166 return(0);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
167
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
168 if (memcmp(signature, "Creative Voice File\032", sizeof (signature)) != 0)
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
169 {
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
170 Sound_SetError("VOC: Wrong signature; not a VOC file.");
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
171 return(0);
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
172 } /* if */
14
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 /* get the offset where the first datablock is located */
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
175 if (!voc_readbytes(src, &v, &datablockofs, sizeof (Uint16)))
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
176 return(0);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
177
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
178 datablockofs = SDL_SwapLE16(datablockofs);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
179
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
180 if (SDL_RWseek(src, datablockofs, SEEK_SET) != datablockofs)
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
181 {
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
182 Sound_SetError("VOC: Failed to seek to data block.");
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
183 return(0);
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
184 } /* if */
14
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 return(1); /* success! */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
187 } /* voc_check_header */
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
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
190 /* Read next block header, save info, leave position at start of data */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
191 static int voc_get_block(Sound_Sample *sample)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
192 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
193 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
194 SDL_RWops *src = internal->rw;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
195 vs_t *v = (vs_t *) internal->decoder_private;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
196 Uint8 bits24[3];
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
197 Uint8 uc, block;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
198 Uint32 sblen;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
199 Uint16 new_rate_short;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
200 Uint32 new_rate_long;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
201 Uint8 trash[6];
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
202 Uint16 period;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
203 int i;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
204
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
205 v->silent = 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
206 while (v->rest == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
207 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
208 if (SDL_RWread(src, &block, sizeof (block), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
209 return 1; /* assume that's the end of the file. */
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 (block == VOC_TERM)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
212 return 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
213
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
214 if (SDL_RWread(src, bits24, sizeof (bits24), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
215 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
216
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
217 /* Size is an 24-bit value. Ugh. */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
218 sblen = ( (bits24[0]) | (bits24[1] << 8) | (bits24[2] << 16) );
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
219
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
220 switch(block)
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 case VOC_DATA:
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
223 if (!voc_readbytes(src, v, &uc, sizeof (uc)))
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
224 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
225
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
226 /* When DATA block preceeded by an EXTENDED */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
227 /* block, the DATA blocks rate value is invalid */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
228 if (!v->extended)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
229 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
230 if (uc == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
231 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
232 Sound_SetError("VOC Sample rate is zero?");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
233 return 0;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
234 } /* if */
14
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 if ((v->rate != -1) && (uc != v->rate))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
237 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
238 Sound_SetError("VOC sample rate codes differ");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
239 return 0;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
240 } /* if */
14
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 v->rate = uc;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
243 sample->actual.rate = 1000000.0/(256 - v->rate);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
244 v->channels = 1;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
245 } /* if */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
246
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
247 if (!voc_readbytes(src, v, &uc, sizeof (uc)))
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
248 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
249
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
250 if (uc != 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
251 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
252 Sound_SetError("VOC decoder only interprets 8-bit data");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
253 return 0;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
254 } /* if */
14
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->extended = 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
257 v->rest = sblen - 2;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
258 v->size = ST_SIZE_BYTE;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
259 return 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
260
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
261 case VOC_DATA_16:
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
262 if (!voc_readbytes(src, v, &new_rate_long, sizeof (Uint32)))
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
263 return 0;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
264
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
265 new_rate_long = SDL_SwapLE32(new_rate_long);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
266 if (new_rate_long == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
267 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
268 Sound_SetError("VOC Sample rate is zero?");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
269 return 0;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
270 } /* if */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
271 if ((v->rate != -1) && (new_rate_long != v->rate))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
272 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
273 Sound_SetError("VOC sample rate codes differ");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
274 return 0;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
275 } /* if */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
276 v->rate = new_rate_long;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
277 sample->actual.rate = new_rate_long;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
278
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
279 if (!voc_readbytes(src, v, &uc, sizeof (uc)))
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
280 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
281
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
282 switch (uc)
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 8: v->size = ST_SIZE_BYTE; break;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
285 case 16: v->size = ST_SIZE_WORD; break;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
286 default:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
287 Sound_SetError("VOC with unknown data size");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
288 return 0;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
289 } /* switch */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
290
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
291 if (!voc_readbytes(src, v, &v->channels, sizeof (Uint8)))
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
292 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
293
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
294 if (!voc_readbytes(src, v, trash, sizeof (Uint8) * 6))
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
295 return 0;
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 v->rest = sblen - 12;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
298 return 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
299
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
300 case VOC_CONT:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
301 v->rest = sblen;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
302 return 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
303
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
304 case VOC_SILENCE:
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
305 if (!voc_readbytes(src, v, &period, sizeof (period)))
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
306 return 0;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
307
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
308 period = SDL_SwapLE16(period);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
309
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
310 if (!voc_readbytes(src, v, &uc, sizeof (uc)))
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
311 return 0;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
312
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
313 if (uc == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
314 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
315 Sound_SetError("VOC silence sample rate is zero");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
316 return 0;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
317 } /* if */
14
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 /*
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
320 * Some silence-packed files have gratuitously
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
321 * different sample rate codes in silence.
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
322 * Adjust period.
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
323 */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
324 if ((v->rate != -1) && (uc != v->rate))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
325 period = (period * (256 - uc))/(256 - v->rate);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
326 else
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
327 v->rate = uc;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
328 v->rest = period;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
329 v->silent = 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
330 return 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
331
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
332 case VOC_LOOP:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
333 case VOC_LOOPEND:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
334 for(i = 0; i < sblen; i++) /* skip repeat loops. */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
335 {
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
336 if (!voc_readbytes(src, v, trash, sizeof (Uint8)))
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
337 return 0;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
338 } /* for */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
339 break;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
340
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
341 case VOC_EXTENDED:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
342 /* An Extended block is followed by a data block */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
343 /* Set this byte so we know to use the rate */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
344 /* value from the extended block and not the */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
345 /* data block. */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
346 v->extended = 1;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
347 if (!voc_readbytes(src, v, &new_rate_short, sizeof (Uint16)))
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
348 return 0;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
349
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
350 new_rate_short = SDL_SwapLE16(new_rate_short);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
351 if (new_rate_short == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
352 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
353 Sound_SetError("VOC sample rate is zero");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
354 return 0;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
355 } /* if */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
356 if ((v->rate != -1) && (new_rate_short != v->rate))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
357 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
358 Sound_SetError("VOC sample rate codes differ");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
359 return 0;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
360 } /* if */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
361 v->rate = new_rate_short;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
362
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
363 if (!voc_readbytes(src, v, &uc, sizeof (uc)))
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
364 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
365
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
366 if (uc != 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
367 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
368 Sound_SetError("VOC decoder only interprets 8-bit data");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
369 return 0;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
370 } /* if */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
371
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
372 if (!voc_readbytes(src, v, &uc, sizeof (uc)))
14
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 if (uc)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
376 sample->actual.channels = 2; /* Stereo */
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
377
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
378 /* Needed number of channels before finishing
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
379 compute for rate */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
380 sample->actual.rate =
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
381 (256000000L/(65536L - v->rate)) / sample->actual.channels;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
382 /* An extended block must be followed by a data */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
383 /* block to be valid so loop back to top so it */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
384 /* can be grabed. */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
385 continue;
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 case VOC_MARKER:
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
388 if (!voc_readbytes(src, v, trash, sizeof (Uint8) * 2))
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
389 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
390
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
391 /* Falling! Falling! */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
392
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
393 default: /* text block or other krapola. */
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
394 if (!voc_readbytes(src, v, &trash, sizeof (Uint8) * sblen))
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
395 return 0;
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
396
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
397 if (block == VOC_TEXT)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
398 continue; /* get next block */
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
399 } /* switch */
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
400 } /* while */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
401
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
402 return 1;
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
403 } /* voc_get_block */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
404
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
405
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
406 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
407 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
408 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
409 SDL_RWops *src = internal->rw;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
410 vs_t *v = (vs_t *) internal->decoder_private;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
411 int done = 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
412 Uint8 silence = 0x80;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
413 Uint8 *buf = internal->buffer;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
414
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
415 if (v->rest == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
416 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
417 if (!voc_get_block(sample))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
418 return 0;
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
419 } /* if */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
420
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
421 if (v->rest == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
422 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
423
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
424 max = (v->rest < max) ? v->rest : max;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
425
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
426 if (v->silent)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
427 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
428 if (v->size == ST_SIZE_WORD)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
429 silence = 0x00;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
430
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
431 /* Fill in silence */
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
432 if (fill_buf)
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
433 memset(buf + v->bufpos, silence, max);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
434
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
435 done = max;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
436 v->rest -= done;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
437 } /* if */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
438
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
439 else
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
440 {
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
441 if (fill_buf)
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
442 {
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
443 done = SDL_RWread(src, buf + v->bufpos, 1, max);
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
444 if (done < max)
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
445 {
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
446 Sound_SetError("VOC: i/o error");
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
447 sample->flags |= SOUND_SAMPLEFLAG_ERROR;
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
448 } /* if */
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
449 } /* if */
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
450
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
451 else
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
452 {
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
453 int cur, rc;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
454 cur = SDL_RWtell(src);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
455 if (cur >= 0)
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
456 {
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
457 rc = SDL_RWseek(src, max, SEEK_CUR);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
458 if (rc >= 0)
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
459 done = rc - cur;
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
460 else
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
461 {
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
462 Sound_SetError("VOC: seek error");
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
463 sample->flags |= SOUND_SAMPLEFLAG_ERROR;
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
464 } /* else */
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
465 } /* if */
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
466 } /* else */
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
467
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
468 v->rest -= done;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
469 v->bufpos += done;
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
470 } /* else */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
471
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
472 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
473 } /* voc_read_waveform */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
474
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
475
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
476 static int VOC_open(Sound_Sample *sample, const char *ext)
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 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
479 vs_t *v = NULL;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
480
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
481 if (!voc_check_header(internal->rw))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
482 return(0);
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 v = (vs_t *) malloc(sizeof (vs_t));
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
485 BAIL_IF_MACRO(v == NULL, ERR_OUT_OF_MEMORY, 0);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
486 memset(v, '\0', sizeof (vs_t));
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
487 internal->decoder_private = v;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
488
224
1bafef18dabf Implemented rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents: 221
diff changeset
489 v->start_pos = SDL_RWtell(internal->rw);
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
490 v->rate = -1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
491 if (!voc_get_block(sample))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
492 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
493 free(v);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
494 return(0);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
495 } /* if */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
496
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
497 if (v->rate == -1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
498 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
499 Sound_SetError("VOC data had no sound!");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
500 free(v);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
501 return(0);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
502 } /* if */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
503
62
b13fafb976be Changed _D macro to DBGSND.
Ryan C. Gordon <icculus@icculus.org>
parents: 47
diff changeset
504 SNDDBG(("VOC: Accepting data stream.\n"));
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
505 sample->actual.format = (v->size == ST_SIZE_WORD) ? AUDIO_S16LSB:AUDIO_U8;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
506 sample->actual.channels = v->channels;
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
507 sample->flags = SOUND_SAMPLEFLAG_CANSEEK;
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
508 return(1);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
509 } /* VOC_open */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
510
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
511
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
512 static void VOC_close(Sound_Sample *sample)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
513 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
514 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
515 free(internal->decoder_private);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
516 } /* VOC_close */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
517
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
518
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
519 static Uint32 VOC_read(Sound_Sample *sample)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
520 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
521 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
522 vs_t *v = (vs_t *) internal->decoder_private;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
523
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
524 v->bufpos = 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
525 while (v->bufpos < internal->buffer_size)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
526 {
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
527 Uint32 rc = voc_read_waveform(sample, 1, internal->buffer_size);
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
528 if (rc == 0)
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
529 {
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
530 sample->flags |= (v->error) ?
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
531 SOUND_SAMPLEFLAG_ERROR :
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
532 SOUND_SAMPLEFLAG_EOF;
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
533 break;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
534 } /* if */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
535
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
536 if (!voc_get_block(sample))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
537 {
385
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
538 sample->flags |= (v->error) ?
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
539 SOUND_SAMPLEFLAG_ERROR :
9efb760c4a6b FIXME removal and cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 377
diff changeset
540 SOUND_SAMPLEFLAG_EOF;
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
541 break;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
542 } /* if */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
543 } /* while */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
544
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
545 return(v->bufpos);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
546 } /* VOC_read */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
547
221
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
548
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
549 static int VOC_rewind(Sound_Sample *sample)
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
550 {
224
1bafef18dabf Implemented rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents: 221
diff changeset
551 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
1bafef18dabf Implemented rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents: 221
diff changeset
552 vs_t *v = (vs_t *) internal->decoder_private;
1bafef18dabf Implemented rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents: 221
diff changeset
553 int rc = SDL_RWseek(internal->rw, v->start_pos, SEEK_SET);
1bafef18dabf Implemented rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents: 221
diff changeset
554 BAIL_IF_MACRO(rc != v->start_pos, ERR_IO_ERROR, 0);
1bafef18dabf Implemented rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents: 221
diff changeset
555 v->rest = 0;
1bafef18dabf Implemented rewind method.
Ryan C. Gordon <icculus@icculus.org>
parents: 221
diff changeset
556 return(1);
221
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
557 } /* VOC_rewind */
c9772a9f5271 Initial implementation or stubs for rewind method. Other cleanups.
Ryan C. Gordon <icculus@icculus.org>
parents: 184
diff changeset
558
306
c97be6e1bd27 Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents: 301
diff changeset
559
c97be6e1bd27 Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents: 301
diff changeset
560 static int VOC_seek(Sound_Sample *sample, Uint32 ms)
c97be6e1bd27 Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents: 301
diff changeset
561 {
335
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
562 /*
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
563 * 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
564 * 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
565 * 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
566 * 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
567 * 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
568 * 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
569 * relatively fast operation in most cases.
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
570 */
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
571
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
572 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
573 vs_t *v = (vs_t *) internal->decoder_private;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
574 int offset = __Sound_convertMsToBytePos(&sample->actual, ms);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
575 int origpos = SDL_RWtell(internal->rw);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
576 int origrest = v->rest;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
577
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
578 BAIL_IF_MACRO(!VOC_rewind(sample), NULL, 0);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
579
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
580 v->bufpos = 0;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
581
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
582 while (offset > 0)
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
583 {
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
584 Uint32 rc = voc_read_waveform(sample, 0, offset);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
585 if ( (rc == 0) || (!voc_get_block(sample)) )
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
586 {
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
587 SDL_RWseek(internal->rw, origpos, SEEK_SET);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
588 v->rest = origrest;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
589 return(0);
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
590 } /* if */
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
591
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
592 offset -= rc;
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
593 } /* while */
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
594
f6475949cd59 Implemented seek method.
Ryan C. Gordon <icculus@icculus.org>
parents: 306
diff changeset
595 return(1);
306
c97be6e1bd27 Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents: 301
diff changeset
596 } /* VOC_seek */
c97be6e1bd27 Added framework for Sound_Seek() support.
Ryan C. Gordon <icculus@icculus.org>
parents: 301
diff changeset
597
64
40006625142a Changes in preparation of autoconf support.
Ryan C. Gordon <icculus@icculus.org>
parents: 62
diff changeset
598 #endif /* SOUND_SUPPORTS_VOC */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
599
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
600 /* end of voc.c ... */