annotate decoders/voc.c @ 164:77482005beb6

Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust stream handling; uses metadata check to see if stream is valid instead of magic number.
author Ryan C. Gordon <icculus@icculus.org>
date Mon, 19 Nov 2001 16:39:42 +0000
parents 1df5c106504e
children 47cc2de2ae36
rev   line source
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1 /*
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2 * SDL_sound -- An abstract sound format decoding API.
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
3 * Copyright (C) 2001 Ryan C. Gordon.
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
4 *
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
5 * This library is free software; you can redistribute it and/or
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
6 * modify it under the terms of the GNU Lesser General Public
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
7 * License as published by the Free Software Foundation; either
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
8 * version 2.1 of the License, or (at your option) any later version.
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
9 *
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
10 * This library is distributed in the hope that it will be useful,
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
13 * Lesser General Public License for more details.
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
14 *
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
15 * You should have received a copy of the GNU Lesser General Public
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
16 * License along with this library; if not, write to the Free Software
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
18 */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
19
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
20 /*
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
21 * VOC decoder for SDL_sound.
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
22 *
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
23 * This driver handles Creative Labs VOC audio data...this is a legacy format,
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
24 * but there's some game ports that could make use of such a decoder. Plus,
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
25 * VOC is fairly straightforward to decode, so this is a more complex, but
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
26 * still palatable example of an SDL_sound decoder. Y'know, in case the
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
27 * RAW decoder didn't do it for you. :)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
28 *
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
29 * This code was ripped from a decoder I had written for SDL_mixer, which was
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
30 * largely ripped from sox v12.17.1's voc.c.
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
31 *
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
32 * SDL_mixer: http://www.libsdl.org/projects/SDL_mixer/
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
33 * sox: http://www.freshmeat.net/projects/sox/
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
34 *
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
35 * Please see the file LICENSE in the source's root directory.
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
36 *
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
37 * This file written by Ryan C. Gordon. (icculus@clutteredmind.org)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
38 */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
39
106
40de367eb59e Changing my include structure to do this right.
Ryan C. Gordon <icculus@icculus.org>
parents: 104
diff changeset
40 #if HAVE_CONFIG_H
40de367eb59e Changing my include structure to do this right.
Ryan C. Gordon <icculus@icculus.org>
parents: 104
diff changeset
41 # include <config.h>
40de367eb59e Changing my include structure to do this right.
Ryan C. Gordon <icculus@icculus.org>
parents: 104
diff changeset
42 #endif
100
6d9fdec2f708 added config.h, added --enable-debug flag, various other changes to the build system
fingolfin
parents: 64
diff changeset
43
114
dd95a12539fd Changed an #if defined to #ifdef, for consistency with the other
Ryan C. Gordon <icculus@icculus.org>
parents: 106
diff changeset
44 #ifdef SOUND_SUPPORTS_VOC
104
103cfcb3c014 Updated to fix build system problem.
Ryan C. Gordon <icculus@icculus.org>
parents: 100
diff changeset
45
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
46 #include <stdio.h>
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
47 #include <stdlib.h>
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
48 #include <string.h>
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
49 #include <assert.h>
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
50
106
40de367eb59e Changing my include structure to do this right.
Ryan C. Gordon <icculus@icculus.org>
parents: 104
diff changeset
51 #include "SDL_sound.h"
40de367eb59e Changing my include structure to do this right.
Ryan C. Gordon <icculus@icculus.org>
parents: 104
diff changeset
52
40de367eb59e Changing my include structure to do this right.
Ryan C. Gordon <icculus@icculus.org>
parents: 104
diff changeset
53 #define __SDL_SOUND_INTERNAL__
40de367eb59e Changing my include structure to do this right.
Ryan C. Gordon <icculus@icculus.org>
parents: 104
diff changeset
54 #include "SDL_sound_internal.h"
40de367eb59e Changing my include structure to do this right.
Ryan C. Gordon <icculus@icculus.org>
parents: 104
diff changeset
55
47
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
56 static int VOC_init(void);
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
57 static void VOC_quit(void);
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
58 static int VOC_open(Sound_Sample *sample, const char *ext);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
59 static void VOC_close(Sound_Sample *sample);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
60 static Uint32 VOC_read(Sound_Sample *sample);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
61
149
1df5c106504e Decoders can now list multiple file extensions.
Ryan C. Gordon <icculus@icculus.org>
parents: 114
diff changeset
62 static const char *extensions_voc[] = { "VOC", NULL };
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
63 const Sound_DecoderFunctions __Sound_DecoderFunctions_VOC =
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
64 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
65 {
149
1df5c106504e Decoders can now list multiple file extensions.
Ryan C. Gordon <icculus@icculus.org>
parents: 114
diff changeset
66 extensions_voc,
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
67 "Creative Labs Voice format",
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
68 "Ryan C. Gordon <icculus@clutteredmind.org>",
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
69 "http://www.icculus.org/SDL_sound/"
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
70 },
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
71
47
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
72 VOC_init, /* init() method */
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
73 VOC_quit, /* quit() method */
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
74 VOC_open, /* open() method */
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
75 VOC_close, /* close() method */
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
76 VOC_read /* read() method */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
77 };
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
78
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
79
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
80 /* Private data for VOC file */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
81 typedef struct vocstuff {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
82 Uint32 rest; /* bytes remaining in current block */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
83 Uint32 rate; /* rate code (byte) of this chunk */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
84 int silent; /* sound or silence? */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
85 Uint32 srate; /* rate code (byte) of silence */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
86 Uint32 blockseek; /* start of current output block */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
87 Uint32 samples; /* number of samples output */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
88 Uint32 size; /* word length of data */
32
4a60ee42ca9a Fixed a byte-ordering issue.
Ryan C. Gordon <icculus@icculus.org>
parents: 22
diff changeset
89 Uint8 channels; /* number of sound channels */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
90 int extended; /* Has an extended block been read? */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
91 Uint32 bufpos; /* byte position in internal->buffer. */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
92 } vs_t;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
93
62
b13fafb976be Changed _D macro to DBGSND.
Ryan C. Gordon <icculus@icculus.org>
parents: 47
diff changeset
94 /* Size field */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
95 /* SJB: note that the 1st 3 are sometimes used as sizeof(type) */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
96 #define ST_SIZE_BYTE 1
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
97 #define ST_SIZE_8BIT 1
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
98 #define ST_SIZE_WORD 2
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
99 #define ST_SIZE_16BIT 2
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
100 #define ST_SIZE_DWORD 4
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
101 #define ST_SIZE_32BIT 4
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
102 #define ST_SIZE_FLOAT 5
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
103 #define ST_SIZE_DOUBLE 6
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
104 #define ST_SIZE_IEEE 7 /* IEEE 80-bit floats. */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
105
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
106 /* Style field */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
107 #define ST_ENCODING_UNSIGNED 1 /* unsigned linear: Sound Blaster */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
108 #define ST_ENCODING_SIGN2 2 /* signed linear 2's comp: Mac */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
109 #define ST_ENCODING_ULAW 3 /* U-law signed logs: US telephony, SPARC */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
110 #define ST_ENCODING_ALAW 4 /* A-law signed logs: non-US telephony */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
111 #define ST_ENCODING_ADPCM 5 /* Compressed PCM */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
112 #define ST_ENCODING_IMA_ADPCM 6 /* Compressed PCM */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
113 #define ST_ENCODING_GSM 7 /* GSM 6.10 33-byte frame lossy compression */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
114
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
115 #define VOC_TERM 0
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
116 #define VOC_DATA 1
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
117 #define VOC_CONT 2
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
118 #define VOC_SILENCE 3
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
119 #define VOC_MARKER 4
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
120 #define VOC_TEXT 5
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
121 #define VOC_LOOP 6
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
122 #define VOC_LOOPEND 7
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
123 #define VOC_EXTENDED 8
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
124 #define VOC_DATA_16 9
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
125
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
126
47
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
127 static int VOC_init(void)
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
128 {
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
129 return(1); /* always succeeds. */
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
130 } /* VOC_init */
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
131
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
132
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
133 static void VOC_quit(void)
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
134 {
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
135 /* it's a no-op. */
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
136 } /* VOC_quit */
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
137
ea58bc3b15d7 Added init() and quit() methods.
Ryan C. Gordon <icculus@icculus.org>
parents: 32
diff changeset
138
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
139 static __inline__ int voc_check_header(SDL_RWops *src)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
140 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
141 /* VOC magic header */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
142 Uint8 signature[20]; /* "Creative Voice File\032" */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
143 Uint16 datablockofs;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
144
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
145 if (SDL_RWread(src, signature, sizeof (signature), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
146 return(0);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
147
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
148 if (memcmp(signature, "Creative Voice File\032", sizeof (signature)) != 0) {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
149 Sound_SetError("Unrecognized file type (not VOC)");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
150 return(0);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
151 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
152
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
153 /* get the offset where the first datablock is located */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
154 if (SDL_RWread(src, &datablockofs, sizeof (Uint16), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
155 return(0);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
156
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
157 datablockofs = SDL_SwapLE16(datablockofs);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
158
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
159 if (SDL_RWseek(src, datablockofs, SEEK_SET) != datablockofs)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
160 return(0);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
161
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
162 return(1); /* success! */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
163 } /* voc_check_header */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
164
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
165 /* !!! 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
166
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
167 /* Read next block header, save info, leave position at start of data */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
168 static int voc_get_block(Sound_Sample *sample)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
169 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
170 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
171 SDL_RWops *src = internal->rw;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
172 vs_t *v = (vs_t *) internal->decoder_private;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
173 Uint8 bits24[3];
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
174 Uint8 uc, block;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
175 Uint32 sblen;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
176 Uint16 new_rate_short;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
177 Uint32 new_rate_long;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
178 Uint8 trash[6];
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
179 Uint16 period;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
180 int i;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
181
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
182 v->silent = 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
183 while (v->rest == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
184 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
185 if (SDL_RWread(src, &block, sizeof (block), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
186 return 1; /* assume that's the end of the file. */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
187
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
188 if (block == VOC_TERM)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
189 return 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
190
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
191 if (SDL_RWread(src, bits24, sizeof (bits24), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
192 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
193
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
194 /* Size is an 24-bit value. Ugh. */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
195 sblen = ( (bits24[0]) | (bits24[1] << 8) | (bits24[2] << 16) );
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
196
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
197 switch(block)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
198 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
199 case VOC_DATA:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
200 if (SDL_RWread(src, &uc, sizeof (uc), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
201 return 0;
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 /* When DATA block preceeded by an EXTENDED */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
204 /* block, the DATA blocks rate value is invalid */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
205 if (!v->extended)
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 if (uc == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
208 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
209 Sound_SetError("VOC Sample rate is zero?");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
210 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
211 }
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 if ((v->rate != -1) && (uc != v->rate))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
214 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
215 Sound_SetError("VOC sample rate codes differ");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
216 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
217 }
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 v->rate = uc;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
220 sample->actual.rate = 1000000.0/(256 - v->rate);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
221 v->channels = 1;
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
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
224 if (SDL_RWread(src, &uc, sizeof (uc), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
225 return 0;
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 if (uc != 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
228 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
229 Sound_SetError("VOC decoder only interprets 8-bit data");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
230 return 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
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
233 v->extended = 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
234 v->rest = sblen - 2;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
235 v->size = ST_SIZE_BYTE;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
236 return 1;
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 case VOC_DATA_16:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
239 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
240 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
241 new_rate_long = SDL_SwapLE32(new_rate_long);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
242 if (new_rate_long == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
243 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
244 Sound_SetError("VOC Sample rate is zero?");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
245 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
246 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
247 if ((v->rate != -1) && (new_rate_long != v->rate))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
248 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
249 Sound_SetError("VOC sample rate codes differ");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
250 return 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 v->rate = new_rate_long;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
253 sample->actual.rate = new_rate_long;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
254
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
255 if (SDL_RWread(src, &uc, sizeof (uc), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
256 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
257
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
258 switch (uc)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
259 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
260 case 8: v->size = ST_SIZE_BYTE; break;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
261 case 16: v->size = ST_SIZE_WORD; break;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
262 default:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
263 Sound_SetError("VOC with unknown data size");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
264 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
265 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
266
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
267 if (SDL_RWread(src, &v->channels, sizeof (Uint8), 1) != 1)
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 if (SDL_RWread(src, trash, sizeof (Uint8), 6) != 6)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
271 return 0;
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 v->rest = sblen - 12;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
274 return 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
275
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
276 case VOC_CONT:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
277 v->rest = sblen;
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_SILENCE:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
281 if (SDL_RWread(src, &period, sizeof (period), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
282 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
283 period = SDL_SwapLE16(period);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
284
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
285 if (SDL_RWread(src, &uc, sizeof (uc), 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 if (uc == 0)
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 Sound_SetError("VOC silence sample rate is zero");
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 }
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 /*
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
294 * Some silence-packed files have gratuitously
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
295 * different sample rate codes in silence.
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
296 * Adjust period.
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 if ((v->rate != -1) && (uc != v->rate))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
299 period = (period * (256 - uc))/(256 - v->rate);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
300 else
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
301 v->rate = uc;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
302 v->rest = period;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
303 v->silent = 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
304 return 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
305
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
306 case VOC_LOOP:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
307 case VOC_LOOPEND:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
308 for(i = 0; i < sblen; i++) /* skip repeat loops. */
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 if (SDL_RWread(src, trash, sizeof (Uint8), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
311 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
312 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
313 break;
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 case VOC_EXTENDED:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
316 /* An Extended block is followed by a data block */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
317 /* Set this byte so we know to use the rate */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
318 /* value from the extended block and not the */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
319 /* data block. */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
320 v->extended = 1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
321 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
322 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
323 new_rate_short = SDL_SwapLE16(new_rate_short);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
324 if (new_rate_short == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
325 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
326 Sound_SetError("VOC sample rate is zero");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
327 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
328 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
329 if ((v->rate != -1) && (new_rate_short != v->rate))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
330 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
331 Sound_SetError("VOC sample rate codes differ");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
332 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
333 }
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
334 v->rate = new_rate_short;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
335
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
336 if (SDL_RWread(src, &uc, sizeof (uc), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
337 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
338
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
339 if (uc != 0)
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 Sound_SetError("VOC decoder only interprets 8-bit data");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
342 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
343 }
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 if (SDL_RWread(src, &uc, sizeof (uc), 1) != 1)
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 if (uc)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
349 sample->actual.channels = 2; /* Stereo */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
350 /* Needed number of channels before finishing
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
351 compute for rate */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
352 sample->actual.rate =
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
353 (256000000L/(65536L - v->rate)) / sample->actual.channels;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
354 /* An extended block must be followed by a data */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
355 /* block to be valid so loop back to top so it */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
356 /* can be grabed. */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
357 continue;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
358
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
359 case VOC_MARKER:
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
360 if (SDL_RWread(src, trash, sizeof (Uint8), 2) != 2)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
361 return 0;
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 /* Falling! Falling! */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
364
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
365 default: /* text block or other krapola. */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
366 for(i = 0; i < sblen; i++)
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 if (SDL_RWread(src, &trash, sizeof (Uint8), 1) != 1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
369 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
370 }
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 (block == VOC_TEXT)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
373 continue; /* get next block */
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
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
377 return 1;
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
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
381 static int voc_read_waveform(Sound_Sample *sample)
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
382 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
383 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
384 SDL_RWops *src = internal->rw;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
385 vs_t *v = (vs_t *) internal->decoder_private;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
386 int done = 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
387 Uint8 silence = 0x80;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
388 Uint8 *buf = internal->buffer;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
389
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
390 if (v->rest == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
391 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
392 if (!voc_get_block(sample))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
393 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
394 }
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 (v->rest == 0)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
397 return 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
398
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
399 if (v->silent)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
400 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
401 if (v->size == ST_SIZE_WORD)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
402 silence = 0x00;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
403
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
404 /* Fill in silence */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
405 memset(buf, silence, v->rest);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
406 done = v->rest;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
407 v->rest = 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
408 }
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 else
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
411 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
412 Uint32 max = (v->rest < internal->buffer_size) ?
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
413 v->rest : internal->buffer_size;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
414 done = SDL_RWread(src, buf + v->bufpos, 1, max);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
415 v->rest -= done;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
416 v->bufpos += done;
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
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
419 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
420 } /* voc_read_waveform */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
421
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
422
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
423 static int VOC_open(Sound_Sample *sample, const char *ext)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
424 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
425 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
426 vs_t *v = NULL;
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 (!voc_check_header(internal->rw))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
429 return(0);
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 v = (vs_t *) malloc(sizeof (vs_t));
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
432 BAIL_IF_MACRO(v == NULL, ERR_OUT_OF_MEMORY, 0);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
433 memset(v, '\0', sizeof (vs_t));
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
434 internal->decoder_private = v;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
435
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
436 v->rate = -1;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
437 if (!voc_get_block(sample))
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 free(v);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
440 return(0);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
441 } /* if */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
442
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
443 if (v->rate == -1)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
444 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
445 Sound_SetError("VOC data had no sound!");
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
446 free(v);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
447 return(0);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
448 } /* if */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
449
62
b13fafb976be Changed _D macro to DBGSND.
Ryan C. Gordon <icculus@icculus.org>
parents: 47
diff changeset
450 SNDDBG(("VOC: Accepting data stream.\n"));
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
451 sample->actual.format = (v->size == ST_SIZE_WORD) ? AUDIO_S16LSB:AUDIO_U8;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
452 sample->actual.channels = v->channels;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
453 sample->flags = SOUND_SAMPLEFLAG_NONE;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
454 return(1);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
455 } /* VOC_open */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
456
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
457
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
458 static void VOC_close(Sound_Sample *sample)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
459 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
460 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
461 free(internal->decoder_private);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
462 } /* VOC_close */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
463
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 static Uint32 VOC_read(Sound_Sample *sample)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
466 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
467 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
468 vs_t *v = (vs_t *) internal->decoder_private;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
469
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
470 v->bufpos = 0;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
471 while (v->bufpos < internal->buffer_size)
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
472 {
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 Uint32 rc = voc_read_waveform(sample);
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
474 if (rc == 0) /* !!! FIXME: Could be an error... */
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 sample->flags |= SOUND_SAMPLEFLAG_EOF;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
477 break;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
478 } /* if */
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 if (!voc_get_block(sample))
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
481 {
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
482 sample->flags |= SOUND_SAMPLEFLAG_ERROR;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
483 break;
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
484 } /* if */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
485 } /* while */
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 return(v->bufpos);
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
488 } /* VOC_read */
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
489
64
40006625142a Changes in preparation of autoconf support.
Ryan C. Gordon <icculus@icculus.org>
parents: 62
diff changeset
490 #endif /* SOUND_SUPPORTS_VOC */
14
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
491
41e5e07c5fed Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
492 /* end of voc.c ... */