Statistics
| Branch: | Revision:

ffmpeg / libavformat / riff.c @ 831ec935

History | View | Annotate | Download (18.5 KB)

1
/*
2
 * RIFF codec tags
3
 * Copyright (c) 2000 Fabrice Bellard.
4
 *
5
 * This file is part of FFmpeg.
6
 *
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.
11
 *
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.
16
 *
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
20
 */
21

    
22
#include "libavcodec/avcodec.h"
23
#include "avformat.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. */
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_MSMPEG4V3,    MKTAG('D', 'I', 'V', '3') }, /* default signature when using MSMPEG4 */
56
    { CODEC_ID_MSMPEG4V3,    MKTAG('M', 'P', '4', '3') },
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') },
64
    { CODEC_ID_MSMPEG4V2,    MKTAG('M', 'P', '4', '2') },
65
    { CODEC_ID_MSMPEG4V2,    MKTAG('D', 'I', 'V', '2') },
66
    { CODEC_ID_MSMPEG4V1,    MKTAG('M', 'P', 'G', '4') },
67
    { CODEC_ID_WMV1,         MKTAG('W', 'M', 'V', '1') },
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') },
81
    { CODEC_ID_MPEG1VIDEO,   MKTAG( 1 ,  0 ,  0 ,  16) },
82
    { CODEC_ID_MPEG2VIDEO,   MKTAG( 2 ,  0 ,  0 ,  16) },
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') },
97
    { CODEC_ID_RAWVIDEO,     MKTAG( 0 ,  0 ,  0 ,  0 ) },
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') },
122
    { CODEC_ID_MSRLE,        MKTAG( 1 ,  0 ,  0 ,  0 ) },
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 }
164
};
165

    
166
const AVCodecTag codec_wav_tags[] = {
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 },
189
    { CODEC_ID_WMALOSSLESS,     0x0163 },
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?
201

    
202
    /* FIXME: All of the IDs below are not 16 bit and thus illegal. */
203
    // for NuppelVideo (nuv.c)
204
    { CODEC_ID_PCM_S16LE, MKTAG('R', 'A', 'W', 'A') },
205
    { CODEC_ID_MP3,       MKTAG('L', 'A', 'M', 'E') },
206
    { CODEC_ID_MP3,       MKTAG('M', 'P', '3', ' ') },
207
    { 0, 0 },
208
};
209

    
210
#ifdef CONFIG_MUXERS
211
offset_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

    
218
void 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 */
230
int 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)
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;
245
    } else if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3 || enc->codec_id == CODEC_ID_GSM_MS) {
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
    }
256
    if(bps != enc->bits_per_sample && enc->bits_per_sample){
257
        av_log(enc, AV_LOG_WARNING, "requested bits_per_sample (%d) and actually stored (%d) differ\n", enc->bits_per_sample, bps);
258
    }
259

    
260
    if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3 || enc->codec_id == CODEC_ID_GSM_MS || 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) { //
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 */
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 */
303
    } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV) {
304
        put_le16(pb, 2); /* wav_extra_size */
305
        hdrsize += 2;
306
        put_le16(pb, enc->frame_size); /* wSamplesPerBlock */
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 */
323
void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf)
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 */
332
    put_le32(pb, enc->codec_tag);
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
 */
354
void 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);
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) {
383
            codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
384
            get_buffer(pb, codec->extradata, codec->extradata_size);
385
            size -= cbSize;
386
        }
387

    
388
        /* It is possible for the chunk to contain garbage at the end */
389
        if (size > 0)
390
            url_fskip(pb, size);
391
    }
392
    codec->codec_id = wav_codec_get_id(id, codec->bits_per_sample);
393
}
394

    
395

    
396
int 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;
409
    if (id == CODEC_ID_ADPCM_IMA_WAV && bps == 8)
410
        id = CODEC_ID_PCM_ZORK;
411
    return id;
412
}
413
#endif // CONFIG_DEMUXERS
414

    
415
void 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;
428
        *au_rate = stream->bit_rate ? stream->bit_rate : 8*stream->sample_rate;
429
    }
430
    gcd= ff_gcd(*au_scale, *au_rate);
431
    *au_scale /= gcd;
432
    *au_rate /= gcd;
433
}