IFF stereo support
[libav.git] / libavformat / riff.c
CommitLineData
9d9f4119
MR
1/*
2 * RIFF codec tags
3 * Copyright (c) 2000 Fabrice Bellard.
4 *
b78e7197
DB
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
9d9f4119
MR
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,
9d9f4119
MR
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
9d9f4119
MR
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"
25
26/* Note: when encoding, the first matching tag is used, so order is
27 important if multiple tags possible for a given codec. */
7caf0cc6 28const AVCodecTag codec_bmp_tags[] = {
ab0b2e55
AJ
29 { CODEC_ID_H264, MKTAG('H', '2', '6', '4') },
30 { CODEC_ID_H264, MKTAG('h', '2', '6', '4') },
31 { CODEC_ID_H264, MKTAG('X', '2', '6', '4') },
32 { CODEC_ID_H264, MKTAG('x', '2', '6', '4') },
33 { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') },
34 { CODEC_ID_H264, MKTAG('V', 'S', 'S', 'H') },
ab0b2e55
AJ
35 { CODEC_ID_H263, MKTAG('H', '2', '6', '3') },
36 { CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },
37 { CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
38 { CODEC_ID_H261, MKTAG('H', '2', '6', '1') },
ab0b2e55
AJ
39 { CODEC_ID_H263P, MKTAG('U', '2', '6', '3') },
40 { CODEC_ID_H263P, MKTAG('v', 'i', 'v', '1') },
ab0b2e55
AJ
41 { CODEC_ID_MPEG4, MKTAG('F', 'M', 'P', '4') },
42 { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') },
43 { CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0') },
44 { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
45 { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
46 { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
36b0782e 47 { CODEC_ID_MPEG4, MKTAG( 4 , 0 , 0 , 0 ) }, /* some broken avi use this */
ab0b2e55
AJ
48 { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', '1') },
49 { CODEC_ID_MPEG4, MKTAG('B', 'L', 'Z', '0') },
50 { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
51 { CODEC_ID_MPEG4, MKTAG('U', 'M', 'P', '4') },
52 { CODEC_ID_MPEG4, MKTAG('W', 'V', '1', 'F') },
53 { CODEC_ID_MPEG4, MKTAG('S', 'E', 'D', 'G') },
ab0b2e55 54 { CODEC_ID_MPEG4, MKTAG('R', 'M', 'P', '4') },
ab0b2e55
AJ
55 { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3') }, /* default signature when using MSMPEG4 */
56 { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
ab0b2e55
AJ
57 { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', 'G', '3') },
58 { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '5') },
59 { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '6') },
60 { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '4') },
61 { CODEC_ID_MSMPEG4V3, MKTAG('A', 'P', '4', '1') },
62 { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '1') },
63 { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '0') },
ab0b2e55 64 { CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') },
ab0b2e55 65 { CODEC_ID_MSMPEG4V2, MKTAG('D', 'I', 'V', '2') },
ab0b2e55 66 { CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') },
ab0b2e55 67 { CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') },
ab0b2e55
AJ
68 { CODEC_ID_WMV2, MKTAG('W', 'M', 'V', '2') },
69 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') },
70 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') },
71 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') },
72 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '2', '5') },
73 { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', '0') },
74 { CODEC_ID_DVVIDEO, MKTAG('c', 'd', 'v', 'c') }, /* Canopus DV */
75 { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') },
76 { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') },
77 { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'p', 'g', '2') },
78 { CODEC_ID_MPEG2VIDEO, MKTAG('M', 'P', 'E', 'G') },
79 { CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') },
80 { CODEC_ID_MPEG1VIDEO, MKTAG('V', 'C', 'R', '2') },
36b0782e
AJ
81 { CODEC_ID_MPEG1VIDEO, MKTAG( 1 , 0 , 0 , 16) },
82 { CODEC_ID_MPEG2VIDEO, MKTAG( 2 , 0 , 0 , 16) },
ab0b2e55
AJ
83 { CODEC_ID_MPEG2VIDEO, MKTAG('D', 'V', 'R', ' ') },
84 { CODEC_ID_MPEG2VIDEO, MKTAG('M', 'M', 'E', 'S') },
85 { CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
86 { CODEC_ID_MJPEG, MKTAG('L', 'J', 'P', 'G') },
87 { CODEC_ID_LJPEG, MKTAG('L', 'J', 'P', 'G') },
88 { CODEC_ID_MJPEG, MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */
89 { CODEC_ID_JPEGLS, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - encoder */
90 { CODEC_ID_MJPEG, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - decoder */
91 { CODEC_ID_MJPEG, MKTAG('j', 'p', 'e', 'g') },
92 { CODEC_ID_MJPEG, MKTAG('I', 'J', 'P', 'G') },
93 { CODEC_ID_MJPEG, MKTAG('A', 'V', 'R', 'n') },
94 { CODEC_ID_HUFFYUV, MKTAG('H', 'F', 'Y', 'U') },
95 { CODEC_ID_FFVHUFF, MKTAG('F', 'F', 'V', 'H') },
96 { CODEC_ID_CYUV, MKTAG('C', 'Y', 'U', 'V') },
36b0782e 97 { CODEC_ID_RAWVIDEO, MKTAG( 0 , 0 , 0 , 0 ) },
ab0b2e55
AJ
98 { CODEC_ID_RAWVIDEO, MKTAG('I', '4', '2', '0') },
99 { CODEC_ID_RAWVIDEO, MKTAG('Y', 'U', 'Y', '2') },
100 { CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '2', '2') },
101 { CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', '1', '2') },
102 { CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'V', 'Y') },
103 { CODEC_ID_RAWVIDEO, MKTAG('I', 'Y', 'U', 'V') },
104 { CODEC_ID_RAWVIDEO, MKTAG('Y', '8', '0', '0') },
105 { CODEC_ID_RAWVIDEO, MKTAG('H', 'D', 'Y', 'C') },
106 { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '1') },
107 { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '2') },
108 { CODEC_ID_INDEO4, MKTAG('I', 'V', '4', '1') },
109 { CODEC_ID_INDEO5, MKTAG('I', 'V', '5', '0') },
110 { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') },
111 { CODEC_ID_VP3, MKTAG('V', 'P', '3', '0') },
112 { CODEC_ID_VP5, MKTAG('V', 'P', '5', '0') },
113 { CODEC_ID_VP6, MKTAG('V', 'P', '6', '0') },
114 { CODEC_ID_VP6, MKTAG('V', 'P', '6', '1') },
115 { CODEC_ID_VP6, MKTAG('V', 'P', '6', '2') },
116 { CODEC_ID_ASV1, MKTAG('A', 'S', 'V', '1') },
117 { CODEC_ID_ASV2, MKTAG('A', 'S', 'V', '2') },
118 { CODEC_ID_VCR1, MKTAG('V', 'C', 'R', '1') },
119 { CODEC_ID_FFV1, MKTAG('F', 'F', 'V', '1') },
120 { CODEC_ID_XAN_WC4, MKTAG('X', 'x', 'a', 'n') },
121 { CODEC_ID_MSRLE, MKTAG('m', 'r', 'l', 'e') },
36b0782e 122 { CODEC_ID_MSRLE, MKTAG( 1 , 0 , 0 , 0 ) },
ab0b2e55
AJ
123 { CODEC_ID_MSVIDEO1, MKTAG('M', 'S', 'V', 'C') },
124 { CODEC_ID_MSVIDEO1, MKTAG('m', 's', 'v', 'c') },
125 { CODEC_ID_MSVIDEO1, MKTAG('C', 'R', 'A', 'M') },
126 { CODEC_ID_MSVIDEO1, MKTAG('c', 'r', 'a', 'm') },
127 { CODEC_ID_MSVIDEO1, MKTAG('W', 'H', 'A', 'M') },
128 { CODEC_ID_MSVIDEO1, MKTAG('w', 'h', 'a', 'm') },
129 { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') },
130 { CODEC_ID_TRUEMOTION1, MKTAG('D', 'U', 'C', 'K') },
131 { CODEC_ID_MSZH, MKTAG('M', 'S', 'Z', 'H') },
132 { CODEC_ID_ZLIB, MKTAG('Z', 'L', 'I', 'B') },
133 { CODEC_ID_SNOW, MKTAG('S', 'N', 'O', 'W') },
134 { CODEC_ID_4XM, MKTAG('4', 'X', 'M', 'V') },
135 { CODEC_ID_FLV1, MKTAG('F', 'L', 'V', '1') },
136 { CODEC_ID_FLASHSV, MKTAG('F', 'S', 'V', '1') },
137 { CODEC_ID_VP6F, MKTAG('V', 'P', '6', 'F') },
138 { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') },
139 { CODEC_ID_TSCC, MKTAG('t', 's', 'c', 'c') },
140 { CODEC_ID_ULTI, MKTAG('U', 'L', 'T', 'I') },
141 { CODEC_ID_VIXL, MKTAG('V', 'I', 'X', 'L') },
142 { CODEC_ID_QPEG, MKTAG('Q', 'P', 'E', 'G') },
143 { CODEC_ID_QPEG, MKTAG('Q', '1', '.', '0') },
144 { CODEC_ID_QPEG, MKTAG('Q', '1', '.', '1') },
145 { CODEC_ID_WMV3, MKTAG('W', 'M', 'V', '3') },
146 { CODEC_ID_VC1, MKTAG('W', 'V', 'C', '1') },
147 { CODEC_ID_VC1, MKTAG('W', 'M', 'V', 'A') },
148 { CODEC_ID_LOCO, MKTAG('L', 'O', 'C', 'O') },
149 { CODEC_ID_WNV1, MKTAG('W', 'N', 'V', '1') },
150 { CODEC_ID_AASC, MKTAG('A', 'A', 'S', 'C') },
151 { CODEC_ID_INDEO2, MKTAG('R', 'T', '2', '1') },
152 { CODEC_ID_FRAPS, MKTAG('F', 'P', 'S', '1') },
153 { CODEC_ID_THEORA, MKTAG('t', 'h', 'e', 'o') },
154 { CODEC_ID_TRUEMOTION2, MKTAG('T', 'M', '2', '0') },
155 { CODEC_ID_CSCD, MKTAG('C', 'S', 'C', 'D') },
156 { CODEC_ID_ZMBV, MKTAG('Z', 'M', 'B', 'V') },
157 { CODEC_ID_KMVC, MKTAG('K', 'M', 'V', 'C') },
158 { CODEC_ID_CAVS, MKTAG('C', 'A', 'V', 'S') },
159 { CODEC_ID_JPEG2000, MKTAG('M', 'J', '2', 'C') },
160 { CODEC_ID_VMNC, MKTAG('V', 'M', 'n', 'c') },
161 { CODEC_ID_TARGA, MKTAG('t', 'g', 'a', ' ') },
162 { CODEC_ID_CLJR, MKTAG('c', 'l', 'j', 'r') },
163 { CODEC_ID_NONE, 0 }
9d9f4119
MR
164};
165
7caf0cc6 166const AVCodecTag codec_wav_tags[] = {
8af9090f
DB
167 { CODEC_ID_PCM_S16LE, 0x0001 },
168 { CODEC_ID_PCM_U8, 0x0001 }, /* must come after s16le in this list */
169 { CODEC_ID_PCM_S24LE, 0x0001 },
170 { CODEC_ID_PCM_S32LE, 0x0001 },
171 { CODEC_ID_ADPCM_MS, 0x0002 },
172 { CODEC_ID_PCM_ALAW, 0x0006 },
173 { CODEC_ID_PCM_MULAW, 0x0007 },
174 { CODEC_ID_WMAVOICE, 0x000A },
175 { CODEC_ID_ADPCM_IMA_WAV, 0x0011 },
176 { CODEC_ID_ADPCM_YAMAHA, 0x0020 },
177 { CODEC_ID_TRUESPEECH, 0x0022 },
178 { CODEC_ID_GSM_MS, 0x0031 },
179 { CODEC_ID_ADPCM_G726, 0x0045 },
180 { CODEC_ID_MP2, 0x0050 },
181 { CODEC_ID_MP3, 0x0055 },
182 { CODEC_ID_ADPCM_IMA_DK4, 0x0061 }, /* rogue format number */
183 { CODEC_ID_ADPCM_IMA_DK3, 0x0062 }, /* rogue format number */
184 { CODEC_ID_VOXWARE, 0x0075 },
185 { CODEC_ID_AAC, 0x00ff },
186 { CODEC_ID_WMAV1, 0x0160 },
187 { CODEC_ID_WMAV2, 0x0161 },
188 { CODEC_ID_WMAPRO, 0x0162 },
800b9c24 189 { CODEC_ID_WMALOSSLESS, 0x0163 },
8af9090f
DB
190 { CODEC_ID_ADPCM_CT, 0x0200 },
191 { CODEC_ID_ATRAC3, 0x0270 },
192 { CODEC_ID_IMC, 0x0401 },
193 { CODEC_ID_AC3, 0x2000 },
194 { CODEC_ID_DTS, 0x2001 },
195 { CODEC_ID_SONIC, 0x2048 },
196 { CODEC_ID_SONIC_LS, 0x2048 },
197 { CODEC_ID_AAC, 0x706d },
198 { CODEC_ID_FLAC, 0xF1AC },
199 { CODEC_ID_ADPCM_SWF, ('S'<<8)+'F' },
200 { CODEC_ID_VORBIS, ('V'<<8)+'o' }, //HACK/FIXME, does vorbis in WAV/AVI have an (in)official id?
6ae177aa
DB
201
202 /* FIXME: All of the IDs below are not 16 bit and thus illegal. */
9d9f4119
MR
203 // for NuppelVideo (nuv.c)
204 { CODEC_ID_PCM_S16LE, MKTAG('R', 'A', 'W', 'A') },
8af9090f
DB
205 { CODEC_ID_MP3, MKTAG('L', 'A', 'M', 'E') },
206 { CODEC_ID_MP3, MKTAG('M', 'P', '3', ' ') },
9d9f4119
MR
207 { 0, 0 },
208};
209
9d9f4119
MR
210#ifdef CONFIG_MUXERS
211offset_t start_tag(ByteIOContext *pb, const char *tag)
212{
213 put_tag(pb, tag);
214 put_le32(pb, 0);
215 return url_ftell(pb);
216}
217
218void end_tag(ByteIOContext *pb, offset_t start)
219{
220 offset_t pos;
221
222 pos = url_ftell(pb);
223 url_fseek(pb, start - 4, SEEK_SET);
224 put_le32(pb, (uint32_t)(pos - start));
225 url_fseek(pb, pos, SEEK_SET);
226}
227
228/* WAVEFORMATEX header */
229/* returns the size or -1 on error */
230int put_wav_header(ByteIOContext *pb, AVCodecContext *enc)
231{
232 int bps, blkalign, bytespersec;
233 int hdrsize = 18;
234
235 if(!enc->codec_tag || enc->codec_tag > 0xffff)
9d9f4119
MR
236 return -1;
237
238 put_le16(pb, enc->codec_tag);
239 put_le16(pb, enc->channels);
240 put_le32(pb, enc->sample_rate);
241 if (enc->codec_id == CODEC_ID_PCM_U8 ||
242 enc->codec_id == CODEC_ID_PCM_ALAW ||
243 enc->codec_id == CODEC_ID_PCM_MULAW) {
244 bps = 8;
346a655d 245 } else if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3 || enc->codec_id == CODEC_ID_GSM_MS) {
9d9f4119
MR
246 bps = 0;
247 } 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) { //
248 bps = 4;
249 } else if (enc->codec_id == CODEC_ID_PCM_S24LE) {
250 bps = 24;
251 } else if (enc->codec_id == CODEC_ID_PCM_S32LE) {
252 bps = 32;
253 } else {
254 bps = 16;
255 }
0a3692cd 256 if(bps != enc->bits_per_sample && enc->bits_per_sample){
9376710d
MN
257 av_log(enc, AV_LOG_WARNING, "requested bits_per_sample (%d) and actually stored (%d) differ\n", enc->bits_per_sample, bps);
258 }
9d9f4119 259
346a655d 260 if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3 || enc->codec_id == CODEC_ID_GSM_MS) {
755bfeab 261 blkalign = enc->frame_size; //this is wrong, but it seems many demuxers do not work if this is set correctly
9d9f4119
MR
262 //blkalign = 144 * enc->bit_rate/enc->sample_rate;
263 } else if (enc->codec_id == CODEC_ID_ADPCM_G726) { //
264 blkalign = 1;
265 } else if (enc->block_align != 0) { /* specified by the codec */
266 blkalign = enc->block_align;
267 } else
268 blkalign = enc->channels*bps >> 3;
269 if (enc->codec_id == CODEC_ID_PCM_U8 ||
270 enc->codec_id == CODEC_ID_PCM_S24LE ||
271 enc->codec_id == CODEC_ID_PCM_S32LE ||
272 enc->codec_id == CODEC_ID_PCM_S16LE) {
273 bytespersec = enc->sample_rate * blkalign;
274 } else {
275 bytespersec = enc->bit_rate / 8;
276 }
277 put_le32(pb, bytespersec); /* bytes per second */
278 put_le16(pb, blkalign); /* block align */
279 put_le16(pb, bps); /* bits per sample */
280 if (enc->codec_id == CODEC_ID_MP3) {
281 put_le16(pb, 12); /* wav_extra_size */
282 hdrsize += 12;
283 put_le16(pb, 1); /* wID */
284 put_le32(pb, 2); /* fdwFlags */
285 put_le16(pb, 1152); /* nBlockSize */
286 put_le16(pb, 1); /* nFramesPerBlock */
287 put_le16(pb, 1393); /* nCodecDelay */
288 } else if (enc->codec_id == CODEC_ID_MP2) {
289 put_le16(pb, 22); /* wav_extra_size */
290 hdrsize += 22;
291 put_le16(pb, 2); /* fwHeadLayer */
292 put_le32(pb, enc->bit_rate); /* dwHeadBitrate */
293 put_le16(pb, enc->channels == 2 ? 1 : 8); /* fwHeadMode */
294 put_le16(pb, 0); /* fwHeadModeExt */
295 put_le16(pb, 1); /* wHeadEmphasis */
296 put_le16(pb, 16); /* fwHeadFlags */
297 put_le32(pb, 0); /* dwPTSLow */
298 put_le32(pb, 0); /* dwPTSHigh */
346a655d
MB
299 } else if (enc->codec_id == CODEC_ID_GSM_MS) {
300 put_le16(pb, 2); /* wav_extra_size */
301 hdrsize += 2;
302 put_le16(pb, enc->frame_size); /* wSamplesPerBlock */
9d9f4119
MR
303 } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV) {
304 put_le16(pb, 2); /* wav_extra_size */
305 hdrsize += 2;
5b77a81a 306 put_le16(pb, enc->frame_size); /* wSamplesPerBlock */
9d9f4119
MR
307 } else if(enc->extradata_size){
308 put_le16(pb, enc->extradata_size);
309 put_buffer(pb, enc->extradata, enc->extradata_size);
310 hdrsize += enc->extradata_size;
311 if(hdrsize&1){
312 hdrsize++;
313 put_byte(pb, 0);
314 }
315 } else {
316 hdrsize -= 2;
317 }
318
319 return hdrsize;
320}
321
322/* BITMAPINFOHEADER header */
7caf0cc6 323void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf)
9d9f4119
MR
324{
325 put_le32(pb, 40 + enc->extradata_size); /* size */
326 put_le32(pb, enc->width);
327 put_le32(pb, enc->height);
328 put_le16(pb, 1); /* planes */
329
330 put_le16(pb, enc->bits_per_sample ? enc->bits_per_sample : 24); /* depth */
331 /* compression type */
bb85077f 332 put_le32(pb, enc->codec_tag);
9d9f4119
MR
333 put_le32(pb, enc->width * enc->height * 3);
334 put_le32(pb, 0);
335 put_le32(pb, 0);
336 put_le32(pb, 0);
337 put_le32(pb, 0);
338
339 put_buffer(pb, enc->extradata, enc->extradata_size);
340
341 if (enc->extradata_size & 1)
342 put_byte(pb, 0);
343}
344#endif //CONFIG_MUXERS
345
346#ifdef CONFIG_DEMUXERS
347/* We could be given one of the three possible structures here:
348 * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
349 * is an expansion of the previous one with the fields added
350 * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
351 * WAVEFORMATEX adds 'WORD cbSize' and basically makes itself
352 * an openended structure.
353 */
354void get_wav_header(ByteIOContext *pb, AVCodecContext *codec, int size)
355{
356 int id;
357
358 id = get_le16(pb);
359 codec->codec_type = CODEC_TYPE_AUDIO;
360 codec->codec_tag = id;
361 codec->channels = get_le16(pb);
362 codec->sample_rate = get_le32(pb);
363 codec->bit_rate = get_le32(pb) * 8;
364 codec->block_align = get_le16(pb);
365 if (size == 14) { /* We're dealing with plain vanilla WAVEFORMAT */
366 codec->bits_per_sample = 8;
367 }else
368 codec->bits_per_sample = get_le16(pb);
72fd40bd
BC
369 if (size >= 18) { /* We're obviously dealing with WAVEFORMATEX */
370 int cbSize = get_le16(pb); /* cbSize */
371 size -= 18;
372 cbSize = FFMIN(size, cbSize);
373 if (cbSize >= 22 && id == 0xfffe) { /* WAVEFORMATEXTENSIBLE */
374 codec->bits_per_sample = get_le16(pb);
375 get_le32(pb); /* dwChannelMask */
376 id = get_le32(pb); /* 4 first bytes of GUID */
377 url_fskip(pb, 12); /* skip end of GUID */
378 cbSize -= 22;
379 size -= 22;
380 }
381 codec->extradata_size = cbSize;
382 if (cbSize > 0) {
9d9f4119
MR
383 codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
384 get_buffer(pb, codec->extradata, codec->extradata_size);
72fd40bd
BC
385 size -= cbSize;
386 }
9d9f4119
MR
387
388 /* It is possible for the chunk to contain garbage at the end */
72fd40bd
BC
389 if (size > 0)
390 url_fskip(pb, size);
9d9f4119 391 }
72fd40bd 392 codec->codec_id = wav_codec_get_id(id, codec->bits_per_sample);
9d9f4119
MR
393}
394
395
396int wav_codec_get_id(unsigned int tag, int bps)
397{
398 int id;
399 id = codec_get_id(codec_wav_tags, tag);
400 if (id <= 0)
401 return id;
402 /* handle specific u8 codec */
403 if (id == CODEC_ID_PCM_S16LE && bps == 8)
404 id = CODEC_ID_PCM_U8;
405 if (id == CODEC_ID_PCM_S16LE && bps == 24)
406 id = CODEC_ID_PCM_S24LE;
407 if (id == CODEC_ID_PCM_S16LE && bps == 32)
408 id = CODEC_ID_PCM_S32LE;
a11c2a2c
MN
409 if (id == CODEC_ID_ADPCM_IMA_WAV && bps == 8)
410 id = CODEC_ID_PCM_ZORK;
9d9f4119
MR
411 return id;
412}
413#endif // CONFIG_DEMUXERS
414
415void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale)
416{
417 int gcd;
418
419 *au_ssize= stream->block_align;
420 if(stream->frame_size && stream->sample_rate){
421 *au_scale=stream->frame_size;
422 *au_rate= stream->sample_rate;
423 }else if(stream->codec_type == CODEC_TYPE_VIDEO){
424 *au_scale= stream->time_base.num;
425 *au_rate = stream->time_base.den;
426 }else{
427 *au_scale= stream->block_align ? stream->block_align*8 : 8;
a7805e29 428 *au_rate = stream->bit_rate ? stream->bit_rate : 8*stream->sample_rate;
9d9f4119
MR
429 }
430 gcd= ff_gcd(*au_scale, *au_rate);
431 *au_scale /= gcd;
432 *au_rate /= gcd;
433}