add -Wno-pointer-sign to CFLAGS
[libav.git] / libavformat / riff.c
CommitLineData
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1/*
2 * RIFF codec tags
3 * Copyright (c) 2000 Fabrice Bellard.
4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
9d9f4119 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
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19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include "avformat.h"
23#include "avcodec.h"
24#include "riff.h"
7caf0cc6 25#include "allformats.h" // for asf_muxer
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26
27/* Note: when encoding, the first matching tag is used, so order is
28 important if multiple tags possible for a given codec. */
7caf0cc6 29const AVCodecTag codec_bmp_tags[] = {
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30 { CODEC_ID_H264, MKTAG('H', '2', '6', '4') },
31 { CODEC_ID_H264, MKTAG('h', '2', '6', '4') },
32 { CODEC_ID_H264, MKTAG('X', '2', '6', '4') },
33 { CODEC_ID_H264, MKTAG('x', '2', '6', '4') },
34 { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') },
35 { CODEC_ID_H264, MKTAG('V', 'S', 'S', 'H') },
36
37 { CODEC_ID_H263, MKTAG('H', '2', '6', '3') },
38 { CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },
39 { CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
40 { CODEC_ID_H261, MKTAG('H', '2', '6', '1') },
41
42 /* added based on MPlayer */
43 { CODEC_ID_H263P, MKTAG('U', '2', '6', '3') },
44 { CODEC_ID_H263P, MKTAG('v', 'i', 'v', '1') },
45
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46 { CODEC_ID_MPEG4, MKTAG('F', 'M', 'P', '4') },
47 { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') },
48 { CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0') },
49 { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
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50 { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
51 { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
52 { CODEC_ID_MPEG4, MKTAG(0x04, 0, 0, 0) }, /* some broken avi use this */
53
54 /* added based on MPlayer */
55 { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', '1') },
56 { CODEC_ID_MPEG4, MKTAG('B', 'L', 'Z', '0') },
57 { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
58 { CODEC_ID_MPEG4, MKTAG('U', 'M', 'P', '4') },
59 { CODEC_ID_MPEG4, MKTAG('W', 'V', '1', 'F') },
60 { CODEC_ID_MPEG4, MKTAG('S', 'E', 'D', 'G') },
61
62 { CODEC_ID_MPEG4, MKTAG('R', 'M', 'P', '4') },
63
7caf0cc6 64 { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3') }, /* default signature when using MSMPEG4 */
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65 { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
66
67 /* added based on MPlayer */
68 { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', 'G', '3') },
69 { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '5') },
70 { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '6') },
71 { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '4') },
72 { CODEC_ID_MSMPEG4V3, MKTAG('A', 'P', '4', '1') },
73 { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '1') },
74 { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '0') },
75
76 { CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') },
77
78 /* added based on MPlayer */
79 { CODEC_ID_MSMPEG4V2, MKTAG('D', 'I', 'V', '2') },
80
81 { CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') },
82
83 { CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') },
84
85 /* added based on MPlayer */
86 { CODEC_ID_WMV2, MKTAG('W', 'M', 'V', '2') },
87 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') },
88 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') },
89 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') },
90 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '2', '5') },
91 { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') },
92 { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') },
93 { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'p', 'g', '2') },
94 { CODEC_ID_MPEG2VIDEO, MKTAG('M', 'P', 'E', 'G') },
95 { CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') },
96 { CODEC_ID_MPEG1VIDEO, MKTAG('V', 'C', 'R', '2') },
97 { CODEC_ID_MPEG1VIDEO, 0x10000001 },
98 { CODEC_ID_MPEG2VIDEO, 0x10000002 },
99 { CODEC_ID_MPEG2VIDEO, MKTAG('D', 'V', 'R', ' ') },
100 { CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
101 { CODEC_ID_MJPEG, MKTAG('L', 'J', 'P', 'G') },
102 { CODEC_ID_LJPEG, MKTAG('L', 'J', 'P', 'G') },
103 { CODEC_ID_MJPEG, MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */
104 { CODEC_ID_MJPEG, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - decoder */
105 { CODEC_ID_JPEGLS, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - encoder */
106 { CODEC_ID_HUFFYUV, MKTAG('H', 'F', 'Y', 'U') },
107 { CODEC_ID_FFVHUFF, MKTAG('F', 'F', 'V', 'H') },
108 { CODEC_ID_CYUV, MKTAG('C', 'Y', 'U', 'V') },
af5ba08e 109 { CODEC_ID_RAWVIDEO, 0 },
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110 { CODEC_ID_RAWVIDEO, MKTAG('I', '4', '2', '0') },
111 { CODEC_ID_RAWVIDEO, MKTAG('Y', 'U', 'Y', '2') },
112 { CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '2', '2') },
0b23d689 113 { CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', '1', '2') },
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114 { CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'V', 'Y') },
115 { CODEC_ID_RAWVIDEO, MKTAG('I', 'Y', 'U', 'V') },
3c619838 116 { CODEC_ID_RAWVIDEO, MKTAG('Y', '8', '0', '0') },
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117 { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '1') },
118 { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '2') },
119 { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') },
120 { CODEC_ID_VP3, MKTAG('V', 'P', '3', '0') },
5ce117c3 121 { CODEC_ID_VP5, MKTAG('V', 'P', '5', '0') },
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122 { CODEC_ID_VP6, MKTAG('V', 'P', '6', '0') },
123 { CODEC_ID_VP6, MKTAG('V', 'P', '6', '1') },
5ce117c3 124 { CODEC_ID_VP6, MKTAG('V', 'P', '6', '2') },
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125 { CODEC_ID_ASV1, MKTAG('A', 'S', 'V', '1') },
126 { CODEC_ID_ASV2, MKTAG('A', 'S', 'V', '2') },
127 { CODEC_ID_VCR1, MKTAG('V', 'C', 'R', '1') },
128 { CODEC_ID_FFV1, MKTAG('F', 'F', 'V', '1') },
129 { CODEC_ID_XAN_WC4, MKTAG('X', 'x', 'a', 'n') },
130 { CODEC_ID_MSRLE, MKTAG('m', 'r', 'l', 'e') },
131 { CODEC_ID_MSRLE, MKTAG(0x1, 0x0, 0x0, 0x0) },
132 { CODEC_ID_MSVIDEO1, MKTAG('M', 'S', 'V', 'C') },
133 { CODEC_ID_MSVIDEO1, MKTAG('m', 's', 'v', 'c') },
134 { CODEC_ID_MSVIDEO1, MKTAG('C', 'R', 'A', 'M') },
135 { CODEC_ID_MSVIDEO1, MKTAG('c', 'r', 'a', 'm') },
136 { CODEC_ID_MSVIDEO1, MKTAG('W', 'H', 'A', 'M') },
137 { CODEC_ID_MSVIDEO1, MKTAG('w', 'h', 'a', 'm') },
138 { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') },
139 { CODEC_ID_TRUEMOTION1, MKTAG('D', 'U', 'C', 'K') },
140 { CODEC_ID_MSZH, MKTAG('M', 'S', 'Z', 'H') },
141 { CODEC_ID_ZLIB, MKTAG('Z', 'L', 'I', 'B') },
142 { CODEC_ID_SNOW, MKTAG('S', 'N', 'O', 'W') },
143 { CODEC_ID_4XM, MKTAG('4', 'X', 'M', 'V') },
144 { CODEC_ID_FLV1, MKTAG('F', 'L', 'V', '1') },
145 { CODEC_ID_FLASHSV, MKTAG('F', 'S', 'V', '1') },
aa8f4cee 146 { CODEC_ID_VP6F, MKTAG('V', 'P', '6', 'F') },
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147 { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') },
148 { CODEC_ID_TSCC, MKTAG('t', 's', 'c', 'c') },
149 { CODEC_ID_ULTI, MKTAG('U', 'L', 'T', 'I') },
150 { CODEC_ID_VIXL, MKTAG('V', 'I', 'X', 'L') },
151 { CODEC_ID_QPEG, MKTAG('Q', 'P', 'E', 'G') },
152 { CODEC_ID_QPEG, MKTAG('Q', '1', '.', '0') },
153 { CODEC_ID_QPEG, MKTAG('Q', '1', '.', '1') },
154 { CODEC_ID_WMV3, MKTAG('W', 'M', 'V', '3') },
04ae12e9 155 { CODEC_ID_VC1, MKTAG('W', 'V', 'C', '1') },
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156 { CODEC_ID_LOCO, MKTAG('L', 'O', 'C', 'O') },
157 { CODEC_ID_WNV1, MKTAG('W', 'N', 'V', '1') },
158 { CODEC_ID_AASC, MKTAG('A', 'A', 'S', 'C') },
159 { CODEC_ID_INDEO2, MKTAG('R', 'T', '2', '1') },
160 { CODEC_ID_FRAPS, MKTAG('F', 'P', 'S', '1') },
161 { CODEC_ID_THEORA, MKTAG('t', 'h', 'e', 'o') },
162 { CODEC_ID_TRUEMOTION2, MKTAG('T', 'M', '2', '0') },
163 { CODEC_ID_CSCD, MKTAG('C', 'S', 'C', 'D') },
164 { CODEC_ID_ZMBV, MKTAG('Z', 'M', 'B', 'V') },
165 { CODEC_ID_KMVC, MKTAG('K', 'M', 'V', 'C') },
67630cff 166 { CODEC_ID_CAVS, MKTAG('C', 'A', 'V', 'S') },
f31065f6 167 { CODEC_ID_JPEG2000, MKTAG('M', 'J', '2', 'C') },
eb57c889 168 { CODEC_ID_VMNC, MKTAG('V', 'M', 'n', 'c') },
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169 { CODEC_ID_NONE, 0 },
170};
171
7caf0cc6 172const AVCodecTag codec_wav_tags[] = {
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173 { CODEC_ID_MP2, 0x50 },
174 { CODEC_ID_MP3, 0x55 },
175 { CODEC_ID_AC3, 0x2000 },
176 { CODEC_ID_DTS, 0x2001 },
177 { CODEC_ID_PCM_S16LE, 0x01 },
178 { CODEC_ID_PCM_U8, 0x01 }, /* must come after s16le in this list */
179 { CODEC_ID_PCM_S24LE, 0x01 },
180 { CODEC_ID_PCM_S32LE, 0x01 },
181 { CODEC_ID_PCM_ALAW, 0x06 },
182 { CODEC_ID_PCM_MULAW, 0x07 },
183 { CODEC_ID_ADPCM_MS, 0x02 },
184 { CODEC_ID_ADPCM_IMA_WAV, 0x11 },
185 { CODEC_ID_ADPCM_YAMAHA, 0x20 },
186 { CODEC_ID_ADPCM_G726, 0x45 },
187 { CODEC_ID_ADPCM_IMA_DK4, 0x61 }, /* rogue format number */
188 { CODEC_ID_ADPCM_IMA_DK3, 0x62 }, /* rogue format number */
189 { CODEC_ID_WMAV1, 0x160 },
190 { CODEC_ID_WMAV2, 0x161 },
191 { CODEC_ID_AAC, 0x706d },
cbee7a69 192 { CODEC_ID_AAC, 0xff },
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193 { CODEC_ID_VORBIS, ('V'<<8)+'o' }, //HACK/FIXME, does vorbis in WAV/AVI have an (in)official id?
194 { CODEC_ID_SONIC, 0x2048 },
195 { CODEC_ID_SONIC_LS, 0x2048 },
196 { CODEC_ID_ADPCM_CT, 0x200 },
197 { CODEC_ID_ADPCM_SWF, ('S'<<8)+'F' },
198 { CODEC_ID_TRUESPEECH, 0x22 },
39051d5d 199 { CODEC_ID_FLAC, 0xF1AC },
84ed36da 200 { CODEC_ID_IMC, 0x401 },
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201
202 /* FIXME: All of the IDs below are not 16 bit and thus illegal. */
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203 // for NuppelVideo (nuv.c)
204 { CODEC_ID_PCM_S16LE, MKTAG('R', 'A', 'W', 'A') },
205 { CODEC_ID_MP3, MKTAG('L', 'A', 'M', 'E') },
7b24f9b4 206 { CODEC_ID_MP3, MKTAG('M', 'P', '3', ' ') },
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207 { 0, 0 },
208};
209
7caf0cc6 210unsigned int codec_get_tag(const AVCodecTag *tags, int id)
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211{
212 while (tags->id != CODEC_ID_NONE) {
213 if (tags->id == id)
214 return tags->tag;
215 tags++;
216 }
217 return 0;
218}
219
7caf0cc6 220enum CodecID codec_get_id(const AVCodecTag *tags, unsigned int tag)
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221{
222 while (tags->id != CODEC_ID_NONE) {
223 if( toupper((tag >> 0)&0xFF) == toupper((tags->tag >> 0)&0xFF)
224 && toupper((tag >> 8)&0xFF) == toupper((tags->tag >> 8)&0xFF)
225 && toupper((tag >>16)&0xFF) == toupper((tags->tag >>16)&0xFF)
226 && toupper((tag >>24)&0xFF) == toupper((tags->tag >>24)&0xFF))
227 return tags->id;
228 tags++;
229 }
230 return CODEC_ID_NONE;
231}
232
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233unsigned int av_codec_get_tag(const AVCodecTag *tags[4], enum CodecID id)
234{
235 int i;
6c77805f 236 for(i=0; tags && tags[i]; i++){
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237 int tag= codec_get_tag(tags[i], id);
238 if(tag) return tag;
239 }
240 return 0;
241}
242
243enum CodecID av_codec_get_id(const AVCodecTag *tags[4], unsigned int tag)
244{
245 int i;
6c77805f 246 for(i=0; tags && tags[i]; i++){
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247 enum CodecID id= codec_get_id(tags[i], tag);
248 if(id!=CODEC_ID_NONE) return id;
249 }
250 return CODEC_ID_NONE;
251}
252
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253unsigned int codec_get_bmp_tag(int id)
254{
255 return codec_get_tag(codec_bmp_tags, id);
256}
257
258unsigned int codec_get_wav_tag(int id)
259{
260 return codec_get_tag(codec_wav_tags, id);
261}
262
263enum CodecID codec_get_bmp_id(unsigned int tag)
264{
265 return codec_get_id(codec_bmp_tags, tag);
266}
267
268enum CodecID codec_get_wav_id(unsigned int tag)
269{
270 return codec_get_id(codec_wav_tags, tag);
271}
272
273#ifdef CONFIG_MUXERS
274offset_t start_tag(ByteIOContext *pb, const char *tag)
275{
276 put_tag(pb, tag);
277 put_le32(pb, 0);
278 return url_ftell(pb);
279}
280
281void end_tag(ByteIOContext *pb, offset_t start)
282{
283 offset_t pos;
284
285 pos = url_ftell(pb);
286 url_fseek(pb, start - 4, SEEK_SET);
287 put_le32(pb, (uint32_t)(pos - start));
288 url_fseek(pb, pos, SEEK_SET);
289}
290
291/* WAVEFORMATEX header */
292/* returns the size or -1 on error */
293int put_wav_header(ByteIOContext *pb, AVCodecContext *enc)
294{
295 int bps, blkalign, bytespersec;
296 int hdrsize = 18;
297
298 if(!enc->codec_tag || enc->codec_tag > 0xffff)
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299 return -1;
300
301 put_le16(pb, enc->codec_tag);
302 put_le16(pb, enc->channels);
303 put_le32(pb, enc->sample_rate);
304 if (enc->codec_id == CODEC_ID_PCM_U8 ||
305 enc->codec_id == CODEC_ID_PCM_ALAW ||
306 enc->codec_id == CODEC_ID_PCM_MULAW) {
307 bps = 8;
308 } else if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3) {
309 bps = 0;
310 } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV || enc->codec_id == CODEC_ID_ADPCM_MS || enc->codec_id == CODEC_ID_ADPCM_G726 || enc->codec_id == CODEC_ID_ADPCM_YAMAHA) { //
311 bps = 4;
312 } else if (enc->codec_id == CODEC_ID_PCM_S24LE) {
313 bps = 24;
314 } else if (enc->codec_id == CODEC_ID_PCM_S32LE) {
315 bps = 32;
316 } else {
317 bps = 16;
318 }
319
320 if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3) {
321 blkalign = enc->frame_size; //this is wrong, but seems many demuxers dont work if this is set correctly
322 //blkalign = 144 * enc->bit_rate/enc->sample_rate;
323 } else if (enc->codec_id == CODEC_ID_ADPCM_G726) { //
324 blkalign = 1;
325 } else if (enc->block_align != 0) { /* specified by the codec */
326 blkalign = enc->block_align;
327 } else
328 blkalign = enc->channels*bps >> 3;
329 if (enc->codec_id == CODEC_ID_PCM_U8 ||
330 enc->codec_id == CODEC_ID_PCM_S24LE ||
331 enc->codec_id == CODEC_ID_PCM_S32LE ||
332 enc->codec_id == CODEC_ID_PCM_S16LE) {
333 bytespersec = enc->sample_rate * blkalign;
334 } else {
335 bytespersec = enc->bit_rate / 8;
336 }
337 put_le32(pb, bytespersec); /* bytes per second */
338 put_le16(pb, blkalign); /* block align */
339 put_le16(pb, bps); /* bits per sample */
340 if (enc->codec_id == CODEC_ID_MP3) {
341 put_le16(pb, 12); /* wav_extra_size */
342 hdrsize += 12;
343 put_le16(pb, 1); /* wID */
344 put_le32(pb, 2); /* fdwFlags */
345 put_le16(pb, 1152); /* nBlockSize */
346 put_le16(pb, 1); /* nFramesPerBlock */
347 put_le16(pb, 1393); /* nCodecDelay */
348 } else if (enc->codec_id == CODEC_ID_MP2) {
349 put_le16(pb, 22); /* wav_extra_size */
350 hdrsize += 22;
351 put_le16(pb, 2); /* fwHeadLayer */
352 put_le32(pb, enc->bit_rate); /* dwHeadBitrate */
353 put_le16(pb, enc->channels == 2 ? 1 : 8); /* fwHeadMode */
354 put_le16(pb, 0); /* fwHeadModeExt */
355 put_le16(pb, 1); /* wHeadEmphasis */
356 put_le16(pb, 16); /* fwHeadFlags */
357 put_le32(pb, 0); /* dwPTSLow */
358 put_le32(pb, 0); /* dwPTSHigh */
359 } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV) {
360 put_le16(pb, 2); /* wav_extra_size */
361 hdrsize += 2;
362 put_le16(pb, ((enc->block_align - 4 * enc->channels) / (4 * enc->channels)) * 8 + 1); /* wSamplesPerBlock */
363 } else if(enc->extradata_size){
364 put_le16(pb, enc->extradata_size);
365 put_buffer(pb, enc->extradata, enc->extradata_size);
366 hdrsize += enc->extradata_size;
367 if(hdrsize&1){
368 hdrsize++;
369 put_byte(pb, 0);
370 }
371 } else {
372 hdrsize -= 2;
373 }
374
375 return hdrsize;
376}
377
378/* BITMAPINFOHEADER header */
7caf0cc6 379void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf)
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380{
381 put_le32(pb, 40 + enc->extradata_size); /* size */
382 put_le32(pb, enc->width);
383 put_le32(pb, enc->height);
384 put_le16(pb, 1); /* planes */
385
386 put_le16(pb, enc->bits_per_sample ? enc->bits_per_sample : 24); /* depth */
387 /* compression type */
bb85077f 388 put_le32(pb, enc->codec_tag);
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389 put_le32(pb, enc->width * enc->height * 3);
390 put_le32(pb, 0);
391 put_le32(pb, 0);
392 put_le32(pb, 0);
393 put_le32(pb, 0);
394
395 put_buffer(pb, enc->extradata, enc->extradata_size);
396
397 if (enc->extradata_size & 1)
398 put_byte(pb, 0);
399}
400#endif //CONFIG_MUXERS
401
402#ifdef CONFIG_DEMUXERS
403/* We could be given one of the three possible structures here:
404 * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
405 * is an expansion of the previous one with the fields added
406 * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
407 * WAVEFORMATEX adds 'WORD cbSize' and basically makes itself
408 * an openended structure.
409 */
410void get_wav_header(ByteIOContext *pb, AVCodecContext *codec, int size)
411{
412 int id;
413
414 id = get_le16(pb);
415 codec->codec_type = CODEC_TYPE_AUDIO;
416 codec->codec_tag = id;
417 codec->channels = get_le16(pb);
418 codec->sample_rate = get_le32(pb);
419 codec->bit_rate = get_le32(pb) * 8;
420 codec->block_align = get_le16(pb);
421 if (size == 14) { /* We're dealing with plain vanilla WAVEFORMAT */
422 codec->bits_per_sample = 8;
423 }else
424 codec->bits_per_sample = get_le16(pb);
425 codec->codec_id = wav_codec_get_id(id, codec->bits_per_sample);
426
427 if (size > 16) { /* We're obviously dealing with WAVEFORMATEX */
428 codec->extradata_size = get_le16(pb);
429 if (codec->extradata_size > 0) {
430 if (codec->extradata_size > size - 18)
431 codec->extradata_size = size - 18;
432 codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
433 get_buffer(pb, codec->extradata, codec->extradata_size);
434 } else
435 codec->extradata_size = 0;
436
437 /* It is possible for the chunk to contain garbage at the end */
438 if (size - codec->extradata_size - 18 > 0)
439 url_fskip(pb, size - codec->extradata_size - 18);
440 }
441}
442
443
444int wav_codec_get_id(unsigned int tag, int bps)
445{
446 int id;
447 id = codec_get_id(codec_wav_tags, tag);
448 if (id <= 0)
449 return id;
450 /* handle specific u8 codec */
451 if (id == CODEC_ID_PCM_S16LE && bps == 8)
452 id = CODEC_ID_PCM_U8;
453 if (id == CODEC_ID_PCM_S16LE && bps == 24)
454 id = CODEC_ID_PCM_S24LE;
455 if (id == CODEC_ID_PCM_S16LE && bps == 32)
456 id = CODEC_ID_PCM_S32LE;
457 return id;
458}
459#endif // CONFIG_DEMUXERS
460
461void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale)
462{
463 int gcd;
464
465 *au_ssize= stream->block_align;
466 if(stream->frame_size && stream->sample_rate){
467 *au_scale=stream->frame_size;
468 *au_rate= stream->sample_rate;
469 }else if(stream->codec_type == CODEC_TYPE_VIDEO){
470 *au_scale= stream->time_base.num;
471 *au_rate = stream->time_base.den;
472 }else{
473 *au_scale= stream->block_align ? stream->block_align*8 : 8;
474 *au_rate = stream->bit_rate;
475 }
476 gcd= ff_gcd(*au_scale, *au_rate);
477 *au_scale /= gcd;
478 *au_rate /= gcd;
479}