annotate decoders/flac.c @ 210:4861069841b9

Updated.
author Ryan C. Gordon <icculus@icculus.org>
date Fri, 11 Jan 2002 11:09:42 +0000
parents 47cc2de2ae36
children c9772a9f5271
rev   line source
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1 /*
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2 * SDL_sound -- An abstract sound format decoding API.
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
3 * Copyright (C) 2001 Ryan C. Gordon.
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
4 *
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
5 * This library is free software; you can redistribute it and/or
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
6 * modify it under the terms of the GNU Lesser General Public
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
7 * License as published by the Free Software Foundation; either
72ff7d3a25b6 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.
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
9 *
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
10 * This library is distributed in the hope that it will be useful,
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
13 * Lesser General Public License for more details.
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
14 *
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
15 * You should have received a copy of the GNU Lesser General Public
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
16 * License along with this library; if not, write to the Free Software
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
18 */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
19
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
20 /*
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
21 * FLAC decoder for SDL_sound.
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
22 *
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
23 * This driver handles FLAC audio, that is to say the Free Lossless Audio
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
24 * Codec. It depends on libFLAC for decoding, which can be grabbed from:
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
25 * http://flac.sourceforge.net
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
26 *
184
47cc2de2ae36 Changed reference to "LICENSE" file to "COPYING".
Ryan C. Gordon <icculus@icculus.org>
parents: 182
diff changeset
27 * Please see the file COPYING in the source's root directory.
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
28 *
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
29 * This file written by Torbjörn Andersson. (d91tan@Update.UU.SE)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
30 */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
31
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
32 #if HAVE_CONFIG_H
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
33 # include <config.h>
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
34 #endif
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
35
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
36 #ifdef SOUND_SUPPORTS_FLAC
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
37
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
38 #include <stdio.h>
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
39 #include <stdlib.h>
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
40 #include <string.h>
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
41 #include <assert.h>
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
42
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
43 #include "SDL_sound.h"
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
44
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
45 #define __SDL_SOUND_INTERNAL__
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
46 #include "SDL_sound_internal.h"
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
47
164
77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust
Ryan C. Gordon <icculus@icculus.org>
parents: 155
diff changeset
48 #include "FLAC/stream_decoder.h"
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
49
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
50
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
51 static int FLAC_init(void);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
52 static void FLAC_quit(void);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
53 static int FLAC_open(Sound_Sample *sample, const char *ext);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
54 static void FLAC_close(Sound_Sample *sample);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
55 static Uint32 FLAC_read(Sound_Sample *sample);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
56
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
57 static const char *extensions_flac[] = { "FLAC", "FLA", NULL };
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
58
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
59 const Sound_DecoderFunctions __Sound_DecoderFunctions_FLAC =
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
60 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
61 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
62 extensions_flac,
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
63 "Free Lossless Audio Codec",
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
64 "Torbjörn Andersson <d91tan@Update.UU.SE>",
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
65 "http://flac.sourceforge.net/"
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
66 },
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
67
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
68 FLAC_init, /* init() method */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
69 FLAC_quit, /* quit() method */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
70 FLAC_open, /* open() method */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
71 FLAC_close, /* close() method */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
72 FLAC_read /* read() method */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
73 };
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
74
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
75 /* This is what we store in our internal->decoder_private field. */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
76 typedef struct
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
77 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
78 FLAC__StreamDecoder *decoder;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
79 SDL_RWops *rw;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
80 Sound_Sample *sample;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
81 Uint32 frame_size;
166
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
82 Uint8 is_flac;
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
83 } flac_t;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
84
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
85
166
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
86 static void free_flac(flac_t *f)
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
87 {
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
88 FLAC__stream_decoder_finish(f->decoder);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
89 FLAC__stream_decoder_delete(f->decoder);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
90 free(f);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
91 } /* free_flac */
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
92
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
93
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
94 static FLAC__StreamDecoderReadStatus FLAC_read_callback(
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
95 const FLAC__StreamDecoder *decoder, FLAC__byte buffer[],
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
96 unsigned int *bytes, void *client_data)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
97 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
98 flac_t *f = (flac_t *) client_data;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
99 Uint32 retval;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
100
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
101 #if 0
164
77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust
Ryan C. Gordon <icculus@icculus.org>
parents: 155
diff changeset
102 SNDDBG(("FLAC: Read callback.\n"));
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
103 #endif
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
104
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
105 retval = SDL_RWread(f->rw, (Uint8 *) buffer, 1, *bytes);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
106
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
107 if (retval == 0)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
108 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
109 *bytes = 0;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
110 f->sample->flags |= SOUND_SAMPLEFLAG_EOF;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
111 return(FLAC__STREAM_DECODER_READ_END_OF_STREAM);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
112 } /* if */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
113
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
114 if (retval == -1)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
115 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
116 *bytes = 0;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
117 f->sample->flags |= SOUND_SAMPLEFLAG_ERROR;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
118 return(FLAC__STREAM_DECODER_READ_ABORT);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
119 } /* if */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
120
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
121 if (retval < *bytes)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
122 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
123 *bytes = retval;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
124 f->sample->flags |= SOUND_SAMPLEFLAG_EAGAIN;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
125 } /* if */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
126
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
127 return(FLAC__STREAM_DECODER_READ_CONTINUE);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
128 } /* FLAC_read_callback */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
129
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
130
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
131 static FLAC__StreamDecoderWriteStatus FLAC_write_callback(
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
132 const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame,
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
133 const FLAC__int32 *buffer[], void *client_data)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
134 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
135 flac_t *f = (flac_t *) client_data;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
136 Uint32 i, j;
166
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
137 Uint32 sample;
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
138 Uint8 *dst;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
139
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
140 #if 0
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
141 SNDDBG(("FLAC: Write callback.\n"));
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
142 #endif
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
143
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
144 f->frame_size = frame->header.channels * frame->header.blocksize
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
145 * frame->header.bits_per_sample / 8;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
146
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
147 if (f->frame_size > f->sample->buffer_size)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
148 Sound_SetBufferSize(f->sample, f->frame_size);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
149
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
150 dst = f->sample->buffer;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
151
166
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
152 /* If the sample is neither exactly 8-bit nor 16-bit, it will have to
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
153 * be converted. Unfortunately the buffer is read-only, so we either
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
154 * have to check for each sample, or make a copy of the buffer. I'm
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
155 * not sure which way is best, so I've arbitrarily picked the former.
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
156 */
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
157 if (f->sample->actual.format == AUDIO_S8)
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
158 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
159 for (i = 0; i < frame->header.blocksize; i++)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
160 for (j = 0; j < frame->header.channels; j++)
166
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
161 {
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
162 sample = buffer[j][i];
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
163 if (frame->header.bits_per_sample < 8)
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
164 sample <<= (8 - frame->header.bits_per_sample);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
165 *dst++ = sample & 0x00ff;
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
166 } /* for */
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
167 } /* if */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
168 else
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
169 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
170 for (i = 0; i < frame->header.blocksize; i++)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
171 for (j = 0; j < frame->header.channels; j++)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
172 {
166
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
173 sample = buffer[j][i];
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
174 if (frame->header.bits_per_sample < 16)
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
175 sample <<= (16 - frame->header.bits_per_sample);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
176 else if (frame->header.bits_per_sample > 16)
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
177 sample >>= (frame->header.bits_per_sample - 16);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
178 *dst++ = (sample & 0xff00) >> 8;
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
179 *dst++ = sample & 0x00ff;
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
180 } /* for */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
181 } /* else */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
182
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
183 return(FLAC__STREAM_DECODER_WRITE_CONTINUE);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
184 } /* FLAC_write_callback */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
185
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
186
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
187 void FLAC_metadata_callback(
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
188 const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata,
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
189 void *client_data)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
190 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
191 flac_t *f = (flac_t *) client_data;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
192
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
193 SNDDBG(("FLAC: Metadata callback.\n"));
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
194
166
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
195 /* There are several kinds of metadata, but STREAMINFO is the only
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
196 * one that always has to be there.
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
197 */
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
198 if (metadata->type == FLAC__METADATA_TYPE_STREAMINFO)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
199 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
200 SNDDBG(("FLAC: Metadata is streaminfo.\n"));
166
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
201
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
202 f->is_flac = 1;
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
203 f->sample->actual.channels = metadata->data.stream_info.channels;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
204 f->sample->actual.rate = metadata->data.stream_info.sample_rate;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
205
166
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
206 if (metadata->data.stream_info.bits_per_sample > 8)
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
207 f->sample->actual.format = AUDIO_S16MSB;
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
208 else
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
209 f->sample->actual.format = AUDIO_S8;
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
210 } /* if */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
211 } /* FLAC_metadata_callback */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
212
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
213
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
214 void FLAC_error_callback(
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
215 const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status,
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
216 void *client_data)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
217 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
218 flac_t *f = (flac_t *) client_data;
164
77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust
Ryan C. Gordon <icculus@icculus.org>
parents: 155
diff changeset
219
166
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
220 /* !!! FIXME: Is every error really fatal? I don't know... */
164
77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust
Ryan C. Gordon <icculus@icculus.org>
parents: 155
diff changeset
221 Sound_SetError(FLAC__StreamDecoderErrorStatusString[status]);
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
222 f->sample->flags |= SOUND_SAMPLEFLAG_ERROR;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
223 } /* FLAC_error_callback */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
224
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
225
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
226 static int FLAC_init(void)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
227 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
228 return(1); /* always succeeds. */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
229 } /* FLAC_init */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
230
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
231
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
232 static void FLAC_quit(void)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
233 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
234 /* it's a no-op. */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
235 } /* FLAC_quit */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
236
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
237
182
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
238 #define FLAC_MAGIC 0x43614C66 /* "fLaC" in ASCII. */
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
239
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
240 static int FLAC_open(Sound_Sample *sample, const char *ext)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
241 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
242 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
243 SDL_RWops *rw = internal->rw;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
244 FLAC__StreamDecoder *decoder;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
245 flac_t *f;
166
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
246 int i;
182
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
247 int has_extension = 0;
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
248
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
249 /*
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
250 * If the extension is "flac", we'll believe that this is really meant
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
251 * to be a FLAC stream, and will try to grok it from existing metadata.
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
252 * metadata searching can be a very expensive operation, however, so
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
253 * unless the user swears that it is a FLAC stream through the extension,
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
254 * we decide what to do based on the existance of a 32-bit magic number.
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
255 */
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
256 for (i = 0; extensions_flac[i] != NULL; i++)
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
257 {
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
258 if (__Sound_strcasecmp(ext, extensions_flac[i]) == 0)
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
259 {
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
260 has_extension = 1;
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
261 break;
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
262 } /* if */
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
263 } /* for */
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
264
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
265 if (!has_extension)
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
266 {
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
267 int rc;
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
268 Uint32 flac_magic = SDL_ReadLE32(rw);
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
269 BAIL_IF_MACRO(flac_magic != FLAC_MAGIC, "FLAC: Not a FLAC stream.", 0);
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
270
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
271 /* move back over magic number for metadata scan... */
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
272 rc = SDL_RWseek(internal->rw, -sizeof (flac_magic), SEEK_CUR);
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
273 BAIL_IF_MACRO(rc < 0, ERR_IO_ERROR, 0);
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
274 } /* if */
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
275
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
276 f = (flac_t *) malloc(sizeof (flac_t));
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
277 BAIL_IF_MACRO(f == NULL, ERR_OUT_OF_MEMORY, 0);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
278
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
279 decoder = FLAC__stream_decoder_new();
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
280 if (decoder == NULL)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
281 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
282 Sound_SetError(ERR_OUT_OF_MEMORY);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
283 free(f);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
284 return(0);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
285 } /* if */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
286
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
287 FLAC__stream_decoder_set_read_callback(decoder, FLAC_read_callback);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
288 FLAC__stream_decoder_set_write_callback(decoder, FLAC_write_callback);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
289 FLAC__stream_decoder_set_metadata_callback(decoder, FLAC_metadata_callback);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
290 FLAC__stream_decoder_set_error_callback(decoder, FLAC_error_callback);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
291 FLAC__stream_decoder_set_client_data(decoder, f);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
292
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
293 f->rw = internal->rw;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
294 f->sample = sample;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
295 f->decoder = decoder;
164
77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust
Ryan C. Gordon <icculus@icculus.org>
parents: 155
diff changeset
296 f->sample->actual.format = 0;
182
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
297 f->is_flac = 0 /* !!! FIXME: should be "has_extension", not "0". */;
166
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
298
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
299 internal->decoder_private = f;
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
300 FLAC__stream_decoder_init(decoder);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
301
182
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
302 /*
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
303 * If we are not sure this is a FLAC stream, check for the STREAMINFO
166
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
304 * metadata block. If not, we'd have to peek at the first audio frame
182
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
305 * and get the sound format from there, but that is not yet
3849438b735e Checks magic number again, unless the file extension is recognized.
Ryan C. Gordon <icculus@icculus.org>
parents: 166
diff changeset
306 * implemented.
166
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
307 */
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
308 if (!f->is_flac)
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
309 {
166
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
310 FLAC__stream_decoder_process_metadata(decoder);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
311
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
312 /* Still not FLAC? Give up. */
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
313 if (!f->is_flac)
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
314 {
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
315 Sound_SetError("FLAC: No metadata found. Not a FLAC stream?");
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
316 free_flac(f);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
317 return(0);
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
318 } /* if */
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
319 } /* if */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
320
164
77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust
Ryan C. Gordon <icculus@icculus.org>
parents: 155
diff changeset
321 SNDDBG(("FLAC: Accepting data stream.\n"));
77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust
Ryan C. Gordon <icculus@icculus.org>
parents: 155
diff changeset
322
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
323 sample->flags = SOUND_SAMPLEFLAG_NONE;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
324 return(1);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
325 } /* FLAC_open */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
326
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
327
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
328 static void FLAC_close(Sound_Sample *sample)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
329 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
330 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
331 flac_t *f = (flac_t *) internal->decoder_private;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
332
166
d8904267d23c Cleanups, fixes and enhancements by Torbj�rn Andersson.
Ryan C. Gordon <icculus@icculus.org>
parents: 164
diff changeset
333 free_flac(f);
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
334 } /* FLAC_close */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
335
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
336
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
337 static Uint32 FLAC_read(Sound_Sample *sample)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
338 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
339 Sound_SampleInternal *internal = (Sound_SampleInternal *) sample->opaque;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
340 flac_t *f = (flac_t *) internal->decoder_private;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
341 Uint32 len;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
342
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
343 if (FLAC__stream_decoder_get_state(f->decoder) == FLAC__STREAM_DECODER_END_OF_STREAM)
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
344 {
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
345 sample->flags |= SOUND_SAMPLEFLAG_EOF;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
346 return(0);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
347 } /* if */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
348
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
349 if (!FLAC__stream_decoder_process_one_frame(f->decoder))
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
350 {
164
77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust
Ryan C. Gordon <icculus@icculus.org>
parents: 155
diff changeset
351 Sound_SetError("FLAC: Couldn't decode frame.");
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
352 sample->flags |= SOUND_SAMPLEFLAG_ERROR;
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
353 return(0);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
354 } /* if */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
355
164
77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust
Ryan C. Gordon <icculus@icculus.org>
parents: 155
diff changeset
356 /* An error may have been signalled through the error callback. */
77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust
Ryan C. Gordon <icculus@icculus.org>
parents: 155
diff changeset
357 if (sample->flags & SOUND_SAMPLEFLAG_ERROR)
77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust
Ryan C. Gordon <icculus@icculus.org>
parents: 155
diff changeset
358 return(0);
77482005beb6 Now includes FLAC/stream_decoder.h instead of FLAC/all.h. More robust
Ryan C. Gordon <icculus@icculus.org>
parents: 155
diff changeset
359
155
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
360 return(f->frame_size);
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
361 } /* FLAC_read */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
362
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
363 #endif /* SOUND_SUPPORTS_FLAC */
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
364
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
365
72ff7d3a25b6 Initial add.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
366 /* end of flac.c ... */