3 * Copyright (c) 2000 Fabrice Bellard.
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavcodec/avcodec.h"
26 /* Note: when encoding, the first matching tag is used, so order is
27 important if multiple tags possible for a given codec. */
28 const AVCodecTag codec_bmp_tags
[] = {
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') },
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') },
39 { CODEC_ID_H263P
, MKTAG('U', '2', '6', '3') },
40 { CODEC_ID_H263P
, MKTAG('v', 'i', 'v', '1') },
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') },
47 { CODEC_ID_MPEG4
, MKTAG( 4 , 0 , 0 , 0 ) }, /* some broken avi use this */
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') },
54 { CODEC_ID_MPEG4
, MKTAG('R', 'M', 'P', '4') },
55 { CODEC_ID_MPEG4
, MKTAG('3', 'I', 'V', '2') },
56 { CODEC_ID_MSMPEG4V3
, MKTAG('D', 'I', 'V', '3') }, /* default signature when using MSMPEG4 */
57 { CODEC_ID_MSMPEG4V3
, MKTAG('M', 'P', '4', '3') },
58 { CODEC_ID_MSMPEG4V3
, MKTAG('M', 'P', 'G', '3') },
59 { CODEC_ID_MSMPEG4V3
, MKTAG('D', 'I', 'V', '5') },
60 { CODEC_ID_MSMPEG4V3
, MKTAG('D', 'I', 'V', '6') },
61 { CODEC_ID_MSMPEG4V3
, MKTAG('D', 'I', 'V', '4') },
62 { CODEC_ID_MSMPEG4V3
, MKTAG('A', 'P', '4', '1') },
63 { CODEC_ID_MSMPEG4V3
, MKTAG('C', 'O', 'L', '1') },
64 { CODEC_ID_MSMPEG4V3
, MKTAG('C', 'O', 'L', '0') },
65 { CODEC_ID_MSMPEG4V2
, MKTAG('M', 'P', '4', '2') },
66 { CODEC_ID_MSMPEG4V2
, MKTAG('D', 'I', 'V', '2') },
67 { CODEC_ID_MSMPEG4V1
, MKTAG('M', 'P', 'G', '4') },
68 { CODEC_ID_WMV1
, MKTAG('W', 'M', 'V', '1') },
69 { CODEC_ID_WMV2
, MKTAG('W', 'M', 'V', '2') },
70 { CODEC_ID_DVVIDEO
, MKTAG('d', 'v', 's', 'd') },
71 { CODEC_ID_DVVIDEO
, MKTAG('d', 'v', 'h', 'd') },
72 { CODEC_ID_DVVIDEO
, MKTAG('d', 'v', 's', 'l') },
73 { CODEC_ID_DVVIDEO
, MKTAG('d', 'v', '2', '5') },
74 { CODEC_ID_DVVIDEO
, MKTAG('d', 'v', '5', '0') },
75 { CODEC_ID_DVVIDEO
, MKTAG('c', 'd', 'v', 'c') }, /* Canopus DV */
76 { CODEC_ID_MPEG1VIDEO
, MKTAG('m', 'p', 'g', '1') },
77 { CODEC_ID_MPEG1VIDEO
, MKTAG('m', 'p', 'g', '2') },
78 { CODEC_ID_MPEG2VIDEO
, MKTAG('m', 'p', 'g', '2') },
79 { CODEC_ID_MPEG2VIDEO
, MKTAG('M', 'P', 'E', 'G') },
80 { CODEC_ID_MPEG1VIDEO
, MKTAG('P', 'I', 'M', '1') },
81 { CODEC_ID_MPEG1VIDEO
, MKTAG('V', 'C', 'R', '2') },
82 { CODEC_ID_MPEG1VIDEO
, MKTAG( 1 , 0 , 0 , 16) },
83 { CODEC_ID_MPEG2VIDEO
, MKTAG( 2 , 0 , 0 , 16) },
84 { CODEC_ID_MPEG2VIDEO
, MKTAG('D', 'V', 'R', ' ') },
85 { CODEC_ID_MPEG2VIDEO
, MKTAG('M', 'M', 'E', 'S') },
86 { CODEC_ID_MJPEG
, MKTAG('M', 'J', 'P', 'G') },
87 { CODEC_ID_MJPEG
, MKTAG('L', 'J', 'P', 'G') },
88 { CODEC_ID_LJPEG
, MKTAG('L', 'J', 'P', 'G') },
89 { CODEC_ID_MJPEG
, MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */
90 { CODEC_ID_JPEGLS
, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - encoder */
91 { CODEC_ID_MJPEG
, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - decoder */
92 { CODEC_ID_MJPEG
, MKTAG('j', 'p', 'e', 'g') },
93 { CODEC_ID_MJPEG
, MKTAG('I', 'J', 'P', 'G') },
94 { CODEC_ID_MJPEG
, MKTAG('A', 'V', 'R', 'n') },
95 { CODEC_ID_HUFFYUV
, MKTAG('H', 'F', 'Y', 'U') },
96 { CODEC_ID_FFVHUFF
, MKTAG('F', 'F', 'V', 'H') },
97 { CODEC_ID_CYUV
, MKTAG('C', 'Y', 'U', 'V') },
98 { CODEC_ID_RAWVIDEO
, MKTAG( 0 , 0 , 0 , 0 ) },
99 { CODEC_ID_RAWVIDEO
, MKTAG('I', '4', '2', '0') },
100 { CODEC_ID_RAWVIDEO
, MKTAG('Y', 'U', 'Y', '2') },
101 { CODEC_ID_RAWVIDEO
, MKTAG('Y', '4', '2', '2') },
102 { CODEC_ID_RAWVIDEO
, MKTAG('Y', 'V', '1', '2') },
103 { CODEC_ID_RAWVIDEO
, MKTAG('U', 'Y', 'V', 'Y') },
104 { CODEC_ID_RAWVIDEO
, MKTAG('I', 'Y', 'U', 'V') },
105 { CODEC_ID_RAWVIDEO
, MKTAG('Y', '8', '0', '0') },
106 { CODEC_ID_RAWVIDEO
, MKTAG('H', 'D', 'Y', 'C') },
107 { CODEC_ID_INDEO3
, MKTAG('I', 'V', '3', '1') },
108 { CODEC_ID_INDEO3
, MKTAG('I', 'V', '3', '2') },
109 { CODEC_ID_INDEO4
, MKTAG('I', 'V', '4', '1') },
110 { CODEC_ID_INDEO5
, MKTAG('I', 'V', '5', '0') },
111 { CODEC_ID_VP3
, MKTAG('V', 'P', '3', '1') },
112 { CODEC_ID_VP3
, MKTAG('V', 'P', '3', '0') },
113 { CODEC_ID_VP5
, MKTAG('V', 'P', '5', '0') },
114 { CODEC_ID_VP6
, MKTAG('V', 'P', '6', '0') },
115 { CODEC_ID_VP6
, MKTAG('V', 'P', '6', '1') },
116 { CODEC_ID_VP6
, MKTAG('V', 'P', '6', '2') },
117 { CODEC_ID_ASV1
, MKTAG('A', 'S', 'V', '1') },
118 { CODEC_ID_ASV2
, MKTAG('A', 'S', 'V', '2') },
119 { CODEC_ID_VCR1
, MKTAG('V', 'C', 'R', '1') },
120 { CODEC_ID_FFV1
, MKTAG('F', 'F', 'V', '1') },
121 { CODEC_ID_XAN_WC4
, MKTAG('X', 'x', 'a', 'n') },
122 { CODEC_ID_MSRLE
, MKTAG('m', 'r', 'l', 'e') },
123 { CODEC_ID_MSRLE
, MKTAG( 1 , 0 , 0 , 0 ) },
124 { CODEC_ID_MSRLE
, MKTAG( 2 , 0 , 0 , 0 ) },
125 { CODEC_ID_MSVIDEO1
, MKTAG('M', 'S', 'V', 'C') },
126 { CODEC_ID_MSVIDEO1
, MKTAG('m', 's', 'v', 'c') },
127 { CODEC_ID_MSVIDEO1
, MKTAG('C', 'R', 'A', 'M') },
128 { CODEC_ID_MSVIDEO1
, MKTAG('c', 'r', 'a', 'm') },
129 { CODEC_ID_MSVIDEO1
, MKTAG('W', 'H', 'A', 'M') },
130 { CODEC_ID_MSVIDEO1
, MKTAG('w', 'h', 'a', 'm') },
131 { CODEC_ID_CINEPAK
, MKTAG('c', 'v', 'i', 'd') },
132 { CODEC_ID_TRUEMOTION1
, MKTAG('D', 'U', 'C', 'K') },
133 { CODEC_ID_MSZH
, MKTAG('M', 'S', 'Z', 'H') },
134 { CODEC_ID_ZLIB
, MKTAG('Z', 'L', 'I', 'B') },
135 { CODEC_ID_SNOW
, MKTAG('S', 'N', 'O', 'W') },
136 { CODEC_ID_4XM
, MKTAG('4', 'X', 'M', 'V') },
137 { CODEC_ID_FLV1
, MKTAG('F', 'L', 'V', '1') },
138 { CODEC_ID_FLASHSV
, MKTAG('F', 'S', 'V', '1') },
139 { CODEC_ID_VP6F
, MKTAG('V', 'P', '6', 'F') },
140 { CODEC_ID_SVQ1
, MKTAG('s', 'v', 'q', '1') },
141 { CODEC_ID_TSCC
, MKTAG('t', 's', 'c', 'c') },
142 { CODEC_ID_ULTI
, MKTAG('U', 'L', 'T', 'I') },
143 { CODEC_ID_VIXL
, MKTAG('V', 'I', 'X', 'L') },
144 { CODEC_ID_QPEG
, MKTAG('Q', 'P', 'E', 'G') },
145 { CODEC_ID_QPEG
, MKTAG('Q', '1', '.', '0') },
146 { CODEC_ID_QPEG
, MKTAG('Q', '1', '.', '1') },
147 { CODEC_ID_WMV3
, MKTAG('W', 'M', 'V', '3') },
148 { CODEC_ID_VC1
, MKTAG('W', 'V', 'C', '1') },
149 { CODEC_ID_VC1
, MKTAG('W', 'M', 'V', 'A') },
150 { CODEC_ID_LOCO
, MKTAG('L', 'O', 'C', 'O') },
151 { CODEC_ID_WNV1
, MKTAG('W', 'N', 'V', '1') },
152 { CODEC_ID_AASC
, MKTAG('A', 'A', 'S', 'C') },
153 { CODEC_ID_INDEO2
, MKTAG('R', 'T', '2', '1') },
154 { CODEC_ID_FRAPS
, MKTAG('F', 'P', 'S', '1') },
155 { CODEC_ID_THEORA
, MKTAG('t', 'h', 'e', 'o') },
156 { CODEC_ID_TRUEMOTION2
, MKTAG('T', 'M', '2', '0') },
157 { CODEC_ID_CSCD
, MKTAG('C', 'S', 'C', 'D') },
158 { CODEC_ID_ZMBV
, MKTAG('Z', 'M', 'B', 'V') },
159 { CODEC_ID_KMVC
, MKTAG('K', 'M', 'V', 'C') },
160 { CODEC_ID_CAVS
, MKTAG('C', 'A', 'V', 'S') },
161 { CODEC_ID_JPEG2000
, MKTAG('M', 'J', '2', 'C') },
162 { CODEC_ID_VMNC
, MKTAG('V', 'M', 'n', 'c') },
163 { CODEC_ID_TARGA
, MKTAG('t', 'g', 'a', ' ') },
164 { CODEC_ID_CLJR
, MKTAG('c', 'l', 'j', 'r') },
165 { CODEC_ID_DIRAC
, MKTAG('d', 'r', 'a', 'c') },
169 const AVCodecTag codec_wav_tags
[] = {
170 { CODEC_ID_PCM_S16LE
, 0x0001 },
171 { CODEC_ID_PCM_U8
, 0x0001 }, /* must come after s16le in this list */
172 { CODEC_ID_PCM_S24LE
, 0x0001 },
173 { CODEC_ID_PCM_S32LE
, 0x0001 },
174 { CODEC_ID_ADPCM_MS
, 0x0002 },
175 { CODEC_ID_PCM_F32LE
, 0x0003 },
176 { CODEC_ID_PCM_F64LE
, 0x0003 }, /* must come after f32le in this list */
177 { CODEC_ID_PCM_ALAW
, 0x0006 },
178 { CODEC_ID_PCM_MULAW
, 0x0007 },
179 { CODEC_ID_WMAVOICE
, 0x000A },
180 { CODEC_ID_ADPCM_IMA_WAV
, 0x0011 },
181 { CODEC_ID_PCM_ZORK
, 0x0011 }, /* must come after adpcm_ima_wav in this list */
182 { CODEC_ID_ADPCM_YAMAHA
, 0x0020 },
183 { CODEC_ID_TRUESPEECH
, 0x0022 },
184 { CODEC_ID_GSM_MS
, 0x0031 },
185 { CODEC_ID_ADPCM_G726
, 0x0045 },
186 { CODEC_ID_MP2
, 0x0050 },
187 { CODEC_ID_MP3
, 0x0055 },
188 { CODEC_ID_ADPCM_IMA_DK4
, 0x0061 }, /* rogue format number */
189 { CODEC_ID_ADPCM_IMA_DK3
, 0x0062 }, /* rogue format number */
190 { CODEC_ID_VOXWARE
, 0x0075 },
191 { CODEC_ID_AAC
, 0x00ff },
192 { CODEC_ID_SIPR
, 0x0130 },
193 { CODEC_ID_WMAV1
, 0x0160 },
194 { CODEC_ID_WMAV2
, 0x0161 },
195 { CODEC_ID_WMAPRO
, 0x0162 },
196 { CODEC_ID_WMALOSSLESS
, 0x0163 },
197 { CODEC_ID_ADPCM_CT
, 0x0200 },
198 { CODEC_ID_ATRAC3
, 0x0270 },
199 { CODEC_ID_IMC
, 0x0401 },
200 { CODEC_ID_AC3
, 0x2000 },
201 { CODEC_ID_DTS
, 0x2001 },
202 { CODEC_ID_SONIC
, 0x2048 },
203 { CODEC_ID_SONIC_LS
, 0x2048 },
204 { CODEC_ID_AAC
, 0x706d },
205 { CODEC_ID_FLAC
, 0xF1AC },
206 { CODEC_ID_ADPCM_SWF
, ('S'<<8)+'F' },
207 { CODEC_ID_VORBIS
, ('V'<<8)+'o' }, //HACK/FIXME, does vorbis in WAV/AVI have an (in)official id?
209 /* FIXME: All of the IDs below are not 16 bit and thus illegal. */
210 // for NuppelVideo (nuv.c)
211 { CODEC_ID_PCM_S16LE
, MKTAG('R', 'A', 'W', 'A') },
212 { CODEC_ID_MP3
, MKTAG('L', 'A', 'M', 'E') },
213 { CODEC_ID_MP3
, MKTAG('M', 'P', '3', ' ') },
218 int64_t start_tag(ByteIOContext
*pb
, const char *tag
)
222 return url_ftell(pb
);
225 void end_tag(ByteIOContext
*pb
, int64_t start
)
230 url_fseek(pb
, start
- 4, SEEK_SET
);
231 put_le32(pb
, (uint32_t)(pos
- start
));
232 url_fseek(pb
, pos
, SEEK_SET
);
235 /* WAVEFORMATEX header */
236 /* returns the size or -1 on error */
237 int put_wav_header(ByteIOContext
*pb
, AVCodecContext
*enc
)
239 int bps
, blkalign
, bytespersec
;
242 if(!enc
->codec_tag
|| enc
->codec_tag
> 0xffff)
245 put_le16(pb
, enc
->codec_tag
);
246 put_le16(pb
, enc
->channels
);
247 put_le32(pb
, enc
->sample_rate
);
248 if (enc
->codec_id
== CODEC_ID_MP2
|| enc
->codec_id
== CODEC_ID_MP3
|| enc
->codec_id
== CODEC_ID_GSM_MS
) {
250 } 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
) { //
253 if (!(bps
= av_get_bits_per_sample(enc
->codec_id
)))
254 bps
= 16; // default to 16
256 if(bps
!= enc
->bits_per_coded_sample
&& enc
->bits_per_coded_sample
){
257 av_log(enc
, AV_LOG_WARNING
, "requested bits_per_coded_sample (%d) and actually stored (%d) differ\n", enc
->bits_per_coded_sample
, bps
);
260 if (enc
->codec_id
== CODEC_ID_MP2
|| enc
->codec_id
== CODEC_ID_MP3
|| enc
->codec_id
== CODEC_ID_AC3
) {
261 blkalign
= enc
->frame_size
; //this is wrong, but it seems many demuxers do not work if this is set correctly
262 //blkalign = 144 * enc->bit_rate/enc->sample_rate;
263 } else if (enc
->codec_id
== CODEC_ID_ADPCM_G726
) { //
265 } else if (enc
->block_align
!= 0) { /* specified by the codec */
266 blkalign
= enc
->block_align
;
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_F32LE
||
273 enc
->codec_id
== CODEC_ID_PCM_F64LE
||
274 enc
->codec_id
== CODEC_ID_PCM_S16LE
) {
275 bytespersec
= enc
->sample_rate
* blkalign
;
277 bytespersec
= enc
->bit_rate
/ 8;
279 put_le32(pb
, bytespersec
); /* bytes per second */
280 put_le16(pb
, blkalign
); /* block align */
281 put_le16(pb
, bps
); /* bits per sample */
282 if (enc
->codec_id
== CODEC_ID_MP3
) {
283 put_le16(pb
, 12); /* wav_extra_size */
285 put_le16(pb
, 1); /* wID */
286 put_le32(pb
, 2); /* fdwFlags */
287 put_le16(pb
, 1152); /* nBlockSize */
288 put_le16(pb
, 1); /* nFramesPerBlock */
289 put_le16(pb
, 1393); /* nCodecDelay */
290 } else if (enc
->codec_id
== CODEC_ID_MP2
) {
291 put_le16(pb
, 22); /* wav_extra_size */
293 put_le16(pb
, 2); /* fwHeadLayer */
294 put_le32(pb
, enc
->bit_rate
); /* dwHeadBitrate */
295 put_le16(pb
, enc
->channels
== 2 ? 1 : 8); /* fwHeadMode */
296 put_le16(pb
, 0); /* fwHeadModeExt */
297 put_le16(pb
, 1); /* wHeadEmphasis */
298 put_le16(pb
, 16); /* fwHeadFlags */
299 put_le32(pb
, 0); /* dwPTSLow */
300 put_le32(pb
, 0); /* dwPTSHigh */
301 } else if (enc
->codec_id
== CODEC_ID_GSM_MS
) {
302 put_le16(pb
, 2); /* wav_extra_size */
304 put_le16(pb
, enc
->frame_size
); /* wSamplesPerBlock */
305 } else if (enc
->codec_id
== CODEC_ID_ADPCM_IMA_WAV
) {
306 put_le16(pb
, 2); /* wav_extra_size */
308 put_le16(pb
, enc
->frame_size
); /* wSamplesPerBlock */
309 } else if(enc
->extradata_size
){
310 put_le16(pb
, enc
->extradata_size
);
311 put_buffer(pb
, enc
->extradata
, enc
->extradata_size
);
312 hdrsize
+= enc
->extradata_size
;
324 /* BITMAPINFOHEADER header */
325 void put_bmp_header(ByteIOContext
*pb
, AVCodecContext
*enc
, const AVCodecTag
*tags
, int for_asf
)
327 put_le32(pb
, 40 + enc
->extradata_size
); /* size */
328 put_le32(pb
, enc
->width
);
329 put_le32(pb
, enc
->height
);
330 put_le16(pb
, 1); /* planes */
332 put_le16(pb
, enc
->bits_per_coded_sample
? enc
->bits_per_coded_sample
: 24); /* depth */
333 /* compression type */
334 put_le32(pb
, enc
->codec_tag
);
335 put_le32(pb
, enc
->width
* enc
->height
* 3);
341 put_buffer(pb
, enc
->extradata
, enc
->extradata_size
);
343 if (enc
->extradata_size
& 1)
346 #endif //CONFIG_MUXERS
348 #ifdef CONFIG_DEMUXERS
349 /* We could be given one of the three possible structures here:
350 * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
351 * is an expansion of the previous one with the fields added
352 * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
353 * WAVEFORMATEX adds 'WORD cbSize' and basically makes itself
354 * an openended structure.
356 void get_wav_header(ByteIOContext
*pb
, AVCodecContext
*codec
, int size
)
361 codec
->codec_type
= CODEC_TYPE_AUDIO
;
362 codec
->codec_tag
= id
;
363 codec
->channels
= get_le16(pb
);
364 codec
->sample_rate
= get_le32(pb
);
365 codec
->bit_rate
= get_le32(pb
) * 8;
366 codec
->block_align
= get_le16(pb
);
367 if (size
== 14) { /* We're dealing with plain vanilla WAVEFORMAT */
368 codec
->bits_per_coded_sample
= 8;
370 codec
->bits_per_coded_sample
= get_le16(pb
);
371 if (size
>= 18) { /* We're obviously dealing with WAVEFORMATEX */
372 int cbSize
= get_le16(pb
); /* cbSize */
374 cbSize
= FFMIN(size
, cbSize
);
375 if (cbSize
>= 22 && id
== 0xfffe) { /* WAVEFORMATEXTENSIBLE */
376 codec
->bits_per_coded_sample
= get_le16(pb
);
377 codec
->channel_layout
= get_le32(pb
); /* dwChannelMask */
378 id
= get_le32(pb
); /* 4 first bytes of GUID */
379 url_fskip(pb
, 12); /* skip end of GUID */
383 codec
->extradata_size
= cbSize
;
385 codec
->extradata
= av_mallocz(codec
->extradata_size
+ FF_INPUT_BUFFER_PADDING_SIZE
);
386 get_buffer(pb
, codec
->extradata
, codec
->extradata_size
);
390 /* It is possible for the chunk to contain garbage at the end */
394 codec
->codec_id
= wav_codec_get_id(id
, codec
->bits_per_coded_sample
);
398 int wav_codec_get_id(unsigned int tag
, int bps
)
401 id
= codec_get_id(codec_wav_tags
, tag
);
404 /* handle specific u8 codec */
405 if (id
== CODEC_ID_PCM_S16LE
&& bps
== 8)
406 id
= CODEC_ID_PCM_U8
;
407 if (id
== CODEC_ID_PCM_S16LE
&& bps
== 24)
408 id
= CODEC_ID_PCM_S24LE
;
409 if (id
== CODEC_ID_PCM_S16LE
&& bps
== 32)
410 id
= CODEC_ID_PCM_S32LE
;
411 if (id
== CODEC_ID_PCM_F32LE
&& bps
== 64)
412 id
= CODEC_ID_PCM_F64LE
;
413 if (id
== CODEC_ID_ADPCM_IMA_WAV
&& bps
== 8)
414 id
= CODEC_ID_PCM_ZORK
;
417 #endif // CONFIG_DEMUXERS
419 void ff_parse_specific_params(AVCodecContext
*stream
, int *au_rate
, int *au_ssize
, int *au_scale
)
423 *au_ssize
= stream
->block_align
;
424 if(stream
->frame_size
&& stream
->sample_rate
){
425 *au_scale
=stream
->frame_size
;
426 *au_rate
= stream
->sample_rate
;
427 }else if(stream
->codec_type
== CODEC_TYPE_VIDEO
){
428 *au_scale
= stream
->time_base
.num
;
429 *au_rate
= stream
->time_base
.den
;
431 *au_scale
= stream
->block_align
? stream
->block_align
*8 : 8;
432 *au_rate
= stream
->bit_rate
? stream
->bit_rate
: 8*stream
->sample_rate
;
434 gcd
= ff_gcd(*au_scale
, *au_rate
);