libavformat/riff.c

   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 #include "libavcodec/bytestream.h"
  26
  27 /* Note: when encoding, the first matching tag is used, so order is
  28    important if multiple tags possible for a given codec. */
  29 const AVCodecTag codec_bmp_tags[] = {
  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     { CODEC_ID_H263,         MKTAG('H', '2', '6', '3') },
  37     { CODEC_ID_H263,         MKTAG('X', '2', '6', '3') },
  38     { CODEC_ID_H263,         MKTAG('T', '2', '6', '3') },
  39     { CODEC_ID_H263,         MKTAG('L', '2', '6', '3') },
  40     { CODEC_ID_H263,         MKTAG('V', 'X', '1', 'K') },
  41     { CODEC_ID_H263,         MKTAG('Z', 'y', 'G', 'o') },
  42     { CODEC_ID_H263P,        MKTAG('H', '2', '6', '3') },
  43     { CODEC_ID_H263I,        MKTAG('I', '2', '6', '3') }, /* intel h263 */
  44     { CODEC_ID_H261,         MKTAG('H', '2', '6', '1') },
  45     { CODEC_ID_H263P,        MKTAG('U', '2', '6', '3') },
  46     { CODEC_ID_H263P,        MKTAG('v', 'i', 'v', '1') },
  47     { CODEC_ID_MPEG4,        MKTAG('F', 'M', 'P', '4') },
  48     { CODEC_ID_MPEG4,        MKTAG('D', 'I', 'V', 'X') },
  49     { CODEC_ID_MPEG4,        MKTAG('D', 'X', '5', '0') },
  50     { CODEC_ID_MPEG4,        MKTAG('X', 'V', 'I', 'D') },
  51     { CODEC_ID_MPEG4,        MKTAG('M', 'P', '4', 'S') },
  52     { CODEC_ID_MPEG4,        MKTAG('M', '4', 'S', '2') },
  53     { CODEC_ID_MPEG4,        MKTAG( 4 ,  0 ,  0 ,  0 ) }, /* some broken avi use this */
  54     { CODEC_ID_MPEG4,        MKTAG('D', 'I', 'V', '1') },
  55     { CODEC_ID_MPEG4,        MKTAG('B', 'L', 'Z', '0') },
  56     { CODEC_ID_MPEG4,        MKTAG('m', 'p', '4', 'v') },
  57     { CODEC_ID_MPEG4,        MKTAG('U', 'M', 'P', '4') },
  58     { CODEC_ID_MPEG4,        MKTAG('W', 'V', '1', 'F') },
  59     { CODEC_ID_MPEG4,        MKTAG('S', 'E', 'D', 'G') },
  60     { CODEC_ID_MPEG4,        MKTAG('R', 'M', 'P', '4') },
  61     { CODEC_ID_MPEG4,        MKTAG('3', 'I', 'V', '2') },
  62     { CODEC_ID_MPEG4,        MKTAG('F', 'F', 'D', 'S') },
  63     { CODEC_ID_MPEG4,        MKTAG('F', 'V', 'F', 'W') },
  64     { CODEC_ID_MPEG4,        MKTAG('D', 'C', 'O', 'D') },
  65     { CODEC_ID_MPEG4,        MKTAG('M', 'V', 'X', 'M') },
  66     { CODEC_ID_MPEG4,        MKTAG('P', 'M', '4', 'V') },
  67     { CODEC_ID_MPEG4,        MKTAG('S', 'M', 'P', '4') },
  68     { CODEC_ID_MPEG4,        MKTAG('D', 'X', 'G', 'M') },
  69     { CODEC_ID_MPEG4,        MKTAG('V', 'I', 'D', 'M') },
  70     { CODEC_ID_MPEG4,        MKTAG('M', '4', 'T', '3') },
  71     { CODEC_ID_MPEG4,        MKTAG('G', 'E', 'O', 'X') },
  72     { CODEC_ID_MPEG4,        MKTAG('H', 'D', 'X', '4') }, /* flipped video */
  73     { CODEC_ID_MPEG4,        MKTAG('D', 'M', 'K', '2') },
  74     { CODEC_ID_MPEG4,        MKTAG('D', 'I', 'G', 'I') },
  75     { CODEC_ID_MPEG4,        MKTAG('I', 'N', 'M', 'C') },
  76     { CODEC_ID_MPEG4,        MKTAG('E', 'P', 'H', 'V') }, /* Ephv MPEG-4 */
  77     { CODEC_ID_MPEG4,        MKTAG('E', 'M', '4', 'A') },
  78     { CODEC_ID_MPEG4,        MKTAG('M', '4', 'C', 'C') }, /* Divio MPEG-4 */
  79     { CODEC_ID_MPEG4,        MKTAG('S', 'N', '4', '0') },
  80     { CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '3') }, /* default signature when using MSMPEG4 */
  81     { CODEC_ID_MSMPEG4V3,    MKTAG('M', 'P', '4', '3') },
  82     { CODEC_ID_MSMPEG4V3,    MKTAG('M', 'P', 'G', '3') },
  83     { CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '5') },
  84     { CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '6') },
  85     { CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '4') },
  86     { CODEC_ID_MSMPEG4V3,    MKTAG('D', 'V', 'X', '3') },
  87     { CODEC_ID_MSMPEG4V3,    MKTAG('A', 'P', '4', '1') },
  88     { CODEC_ID_MSMPEG4V3,    MKTAG('C', 'O', 'L', '1') },
  89     { CODEC_ID_MSMPEG4V3,    MKTAG('C', 'O', 'L', '0') },
  90     { CODEC_ID_MSMPEG4V2,    MKTAG('M', 'P', '4', '2') },
  91     { CODEC_ID_MSMPEG4V2,    MKTAG('D', 'I', 'V', '2') },
  92     { CODEC_ID_MSMPEG4V1,    MKTAG('M', 'P', 'G', '4') },
  93     { CODEC_ID_MSMPEG4V1,    MKTAG('M', 'P', '4', '1') },
  94     { CODEC_ID_WMV1,         MKTAG('W', 'M', 'V', '1') },
  95     { CODEC_ID_WMV2,         MKTAG('W', 'M', 'V', '2') },
  96     { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 's', 'd') },
  97     { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'h', 'd') },
  98     { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 's', 'l') },
  99     { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', '2', '5') },
 100     { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', '5', '0') },
 101     { CODEC_ID_DVVIDEO,      MKTAG('c', 'd', 'v', 'c') }, /* Canopus DV */
 102     { CODEC_ID_DVVIDEO,      MKTAG('C', 'D', 'V', 'H') }, /* Canopus DV */
 103     { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'c', ' ') },
 104     { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'h', '1') },
 105     { CODEC_ID_MPEG1VIDEO,   MKTAG('m', 'p', 'g', '1') },
 106     { CODEC_ID_MPEG1VIDEO,   MKTAG('m', 'p', 'g', '2') },
 107     { CODEC_ID_MPEG2VIDEO,   MKTAG('m', 'p', 'g', '2') },
 108     { CODEC_ID_MPEG2VIDEO,   MKTAG('M', 'P', 'E', 'G') },
 109     { CODEC_ID_MPEG1VIDEO,   MKTAG('P', 'I', 'M', '1') },
 110     { CODEC_ID_MPEG2VIDEO,   MKTAG('P', 'I', 'M', '2') },
 111     { CODEC_ID_MPEG1VIDEO,   MKTAG('V', 'C', 'R', '2') },
 112     { CODEC_ID_MPEG1VIDEO,   MKTAG( 1 ,  0 ,  0 ,  16) },
 113     { CODEC_ID_MPEG2VIDEO,   MKTAG( 2 ,  0 ,  0 ,  16) },
 114     { CODEC_ID_MPEG2VIDEO,   MKTAG('D', 'V', 'R', ' ') },
 115     { CODEC_ID_MPEG2VIDEO,   MKTAG('M', 'M', 'E', 'S') },
 116     { CODEC_ID_MPEG2VIDEO,   MKTAG('L', 'M', 'P', '2') }, /* Lead MPEG2 in avi */
 117     { CODEC_ID_MJPEG,        MKTAG('M', 'J', 'P', 'G') },
 118     { CODEC_ID_MJPEG,        MKTAG('L', 'J', 'P', 'G') },
 119     { CODEC_ID_MJPEG,        MKTAG('d', 'm', 'b', '1') },
 120     { CODEC_ID_LJPEG,        MKTAG('L', 'J', 'P', 'G') },
 121     { CODEC_ID_MJPEG,        MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */
 122     { CODEC_ID_JPEGLS,       MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - encoder */
 123     { CODEC_ID_MJPEG,        MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - decoder */
 124     { CODEC_ID_MJPEG,        MKTAG('j', 'p', 'e', 'g') },
 125     { CODEC_ID_MJPEG,        MKTAG('I', 'J', 'P', 'G') },
 126     { CODEC_ID_MJPEG,        MKTAG('A', 'V', 'R', 'n') },
 127     { CODEC_ID_MJPEG,        MKTAG('A', 'C', 'D', 'V') },
 128     { CODEC_ID_MJPEG,        MKTAG('Q', 'I', 'V', 'G') },
 129     { CODEC_ID_MJPEG,        MKTAG('S', 'L', 'M', 'J') }, /* SL M-JPEG */
 130     { CODEC_ID_MJPEG,        MKTAG('C', 'J', 'P', 'G') }, /* Creative Webcam JPEG */
 131     { CODEC_ID_HUFFYUV,      MKTAG('H', 'F', 'Y', 'U') },
 132     { CODEC_ID_FFVHUFF,      MKTAG('F', 'F', 'V', 'H') },
 133     { CODEC_ID_CYUV,         MKTAG('C', 'Y', 'U', 'V') },
 134     { CODEC_ID_RAWVIDEO,     MKTAG( 0 ,  0 ,  0 ,  0 ) },
 135     { CODEC_ID_RAWVIDEO,     MKTAG('I', '4', '2', '0') },
 136     { CODEC_ID_RAWVIDEO,     MKTAG('Y', 'U', 'Y', '2') },
 137     { CODEC_ID_RAWVIDEO,     MKTAG('Y', '4', '2', '2') },
 138     { CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', '1', '2') },
 139     { CODEC_ID_RAWVIDEO,     MKTAG('U', 'Y', 'V', 'Y') },
 140     { CODEC_ID_RAWVIDEO,     MKTAG('I', 'Y', 'U', 'V') },
 141     { CODEC_ID_RAWVIDEO,     MKTAG('Y', '8', '0', '0') },
 142     { CODEC_ID_RAWVIDEO,     MKTAG('H', 'D', 'Y', 'C') },
 143     { CODEC_ID_INDEO3,       MKTAG('I', 'V', '3', '1') },
 144     { CODEC_ID_INDEO3,       MKTAG('I', 'V', '3', '2') },
 145     { CODEC_ID_INDEO4,       MKTAG('I', 'V', '4', '1') },
 146     { CODEC_ID_INDEO5,       MKTAG('I', 'V', '5', '0') },
 147     { CODEC_ID_VP3,          MKTAG('V', 'P', '3', '1') },
 148     { CODEC_ID_VP3,          MKTAG('V', 'P', '3', '0') },
 149     { CODEC_ID_VP5,          MKTAG('V', 'P', '5', '0') },
 150     { CODEC_ID_VP6,          MKTAG('V', 'P', '6', '0') },
 151     { CODEC_ID_VP6,          MKTAG('V', 'P', '6', '1') },
 152     { CODEC_ID_VP6,          MKTAG('V', 'P', '6', '2') },
 153     { CODEC_ID_ASV1,         MKTAG('A', 'S', 'V', '1') },
 154     { CODEC_ID_ASV2,         MKTAG('A', 'S', 'V', '2') },
 155     { CODEC_ID_VCR1,         MKTAG('V', 'C', 'R', '1') },
 156     { CODEC_ID_FFV1,         MKTAG('F', 'F', 'V', '1') },
 157     { CODEC_ID_XAN_WC4,      MKTAG('X', 'x', 'a', 'n') },
 158     { CODEC_ID_MIMIC,        MKTAG('L', 'M', '2', '0') },
 159     { CODEC_ID_MSRLE,        MKTAG('m', 'r', 'l', 'e') },
 160     { CODEC_ID_MSRLE,        MKTAG( 1 ,  0 ,  0 ,  0 ) },
 161     { CODEC_ID_MSRLE,        MKTAG( 2 ,  0 ,  0 ,  0 ) },
 162     { CODEC_ID_MSVIDEO1,     MKTAG('M', 'S', 'V', 'C') },
 163     { CODEC_ID_MSVIDEO1,     MKTAG('m', 's', 'v', 'c') },
 164     { CODEC_ID_MSVIDEO1,     MKTAG('C', 'R', 'A', 'M') },
 165     { CODEC_ID_MSVIDEO1,     MKTAG('c', 'r', 'a', 'm') },
 166     { CODEC_ID_MSVIDEO1,     MKTAG('W', 'H', 'A', 'M') },
 167     { CODEC_ID_MSVIDEO1,     MKTAG('w', 'h', 'a', 'm') },
 168     { CODEC_ID_CINEPAK,      MKTAG('c', 'v', 'i', 'd') },
 169     { CODEC_ID_TRUEMOTION1,  MKTAG('D', 'U', 'C', 'K') },
 170     { CODEC_ID_TRUEMOTION1,  MKTAG('P', 'V', 'E', 'Z') },
 171     { CODEC_ID_MSZH,         MKTAG('M', 'S', 'Z', 'H') },
 172     { CODEC_ID_ZLIB,         MKTAG('Z', 'L', 'I', 'B') },
 173     { CODEC_ID_SNOW,         MKTAG('S', 'N', 'O', 'W') },
 174     { CODEC_ID_4XM,          MKTAG('4', 'X', 'M', 'V') },
 175     { CODEC_ID_FLV1,         MKTAG('F', 'L', 'V', '1') },
 176     { CODEC_ID_FLASHSV,      MKTAG('F', 'S', 'V', '1') },
 177     { CODEC_ID_VP6F,         MKTAG('V', 'P', '6', 'F') },
 178     { CODEC_ID_SVQ1,         MKTAG('s', 'v', 'q', '1') },
 179     { CODEC_ID_TSCC,         MKTAG('t', 's', 'c', 'c') },
 180     { CODEC_ID_ULTI,         MKTAG('U', 'L', 'T', 'I') },
 181     { CODEC_ID_VIXL,         MKTAG('V', 'I', 'X', 'L') },
 182     { CODEC_ID_QPEG,         MKTAG('Q', 'P', 'E', 'G') },
 183     { CODEC_ID_QPEG,         MKTAG('Q', '1', '.', '0') },
 184     { CODEC_ID_QPEG,         MKTAG('Q', '1', '.', '1') },
 185     { CODEC_ID_WMV3,         MKTAG('W', 'M', 'V', '3') },
 186     { CODEC_ID_VC1,          MKTAG('W', 'V', 'C', '1') },
 187     { CODEC_ID_VC1,          MKTAG('W', 'M', 'V', 'A') },
 188     { CODEC_ID_LOCO,         MKTAG('L', 'O', 'C', 'O') },
 189     { CODEC_ID_WNV1,         MKTAG('W', 'N', 'V', '1') },
 190     { CODEC_ID_AASC,         MKTAG('A', 'A', 'S', 'C') },
 191     { CODEC_ID_INDEO2,       MKTAG('R', 'T', '2', '1') },
 192     { CODEC_ID_FRAPS,        MKTAG('F', 'P', 'S', '1') },
 193     { CODEC_ID_THEORA,       MKTAG('t', 'h', 'e', 'o') },
 194     { CODEC_ID_TRUEMOTION2,  MKTAG('T', 'M', '2', '0') },
 195     { CODEC_ID_CSCD,         MKTAG('C', 'S', 'C', 'D') },
 196     { CODEC_ID_ZMBV,         MKTAG('Z', 'M', 'B', 'V') },
 197     { CODEC_ID_KMVC,         MKTAG('K', 'M', 'V', 'C') },
 198     { CODEC_ID_CAVS,         MKTAG('C', 'A', 'V', 'S') },
 199     { CODEC_ID_JPEG2000,     MKTAG('M', 'J', '2', 'C') },
 200     { CODEC_ID_VMNC,         MKTAG('V', 'M', 'n', 'c') },
 201     { CODEC_ID_TARGA,        MKTAG('t', 'g', 'a', ' ') },
 202     { CODEC_ID_PNG,          MKTAG('M', 'P', 'N', 'G') },
 203     { CODEC_ID_PNG,          MKTAG('P', 'N', 'G', '1') },
 204     { CODEC_ID_CLJR,         MKTAG('c', 'l', 'j', 'r') },
 205     { CODEC_ID_DIRAC,        MKTAG('d', 'r', 'a', 'c') },
 206     { CODEC_ID_RPZA,         MKTAG('a', 'z', 'p', 'r') },
 207     { CODEC_ID_RPZA,         MKTAG('R', 'P', 'Z', 'A') },
 208     { CODEC_ID_RPZA,         MKTAG('r', 'p', 'z', 'a') },
 209     { CODEC_ID_SP5X,         MKTAG('S', 'P', '5', '4') },
 210     { CODEC_ID_AURA,         MKTAG('A', 'U', 'R', 'A') },
 211     { CODEC_ID_AURA2,        MKTAG('A', 'U', 'R', '2') },
 212     { CODEC_ID_NONE,         0 }
 213 };
 214
 215 const AVCodecTag codec_wav_tags[] = {
 216     { CODEC_ID_PCM_S16LE,       0x0001 },
 217     { CODEC_ID_PCM_U8,          0x0001 }, /* must come after s16le in this list */
 218     { CODEC_ID_PCM_S24LE,       0x0001 },
 219     { CODEC_ID_PCM_S32LE,       0x0001 },
 220     { CODEC_ID_ADPCM_MS,        0x0002 },
 221     { CODEC_ID_PCM_F32LE,       0x0003 },
 222     { CODEC_ID_PCM_F64LE,       0x0003 }, /* must come after f32le in this list */
 223     { CODEC_ID_PCM_ALAW,        0x0006 },
 224     { CODEC_ID_PCM_MULAW,       0x0007 },
 225     { CODEC_ID_WMAVOICE,        0x000A },
 226     { CODEC_ID_ADPCM_IMA_WAV,   0x0011 },
 227     { CODEC_ID_PCM_ZORK,        0x0011 }, /* must come after adpcm_ima_wav in this list */
 228     { CODEC_ID_ADPCM_YAMAHA,    0x0020 },
 229     { CODEC_ID_TRUESPEECH,      0x0022 },
 230     { CODEC_ID_GSM_MS,          0x0031 },
 231     { CODEC_ID_ADPCM_G726,      0x0045 },
 232     { CODEC_ID_MP2,             0x0050 },
 233     { CODEC_ID_MP3,             0x0055 },
 234     { CODEC_ID_AMR_NB,          0x0057 },
 235     { CODEC_ID_AMR_WB,          0x0058 },
 236     { CODEC_ID_ADPCM_IMA_DK4,   0x0061 },  /* rogue format number */
 237     { CODEC_ID_ADPCM_IMA_DK3,   0x0062 },  /* rogue format number */
 238     { CODEC_ID_ADPCM_IMA_WAV,   0x0069 },
 239     { CODEC_ID_VOXWARE,         0x0075 },
 240     { CODEC_ID_AAC,             0x00ff },
 241     { CODEC_ID_SIPR,            0x0130 },
 242     { CODEC_ID_WMAV1,           0x0160 },
 243     { CODEC_ID_WMAV2,           0x0161 },
 244     { CODEC_ID_WMAPRO,          0x0162 },
 245     { CODEC_ID_WMALOSSLESS,     0x0163 },
 246     { CODEC_ID_ADPCM_CT,        0x0200 },
 247     { CODEC_ID_ATRAC3,          0x0270 },
 248     { CODEC_ID_IMC,             0x0401 },
 249     { CODEC_ID_AC3,             0x2000 },
 250     { CODEC_ID_DTS,             0x2001 },
 251     { CODEC_ID_SONIC,           0x2048 },
 252     { CODEC_ID_SONIC_LS,        0x2048 },
 253     { CODEC_ID_AAC,             0x706d },
 254     { CODEC_ID_AAC,             0x4143 },
 255     { CODEC_ID_FLAC,            0xF1AC },
 256     { CODEC_ID_ADPCM_SWF,       ('S'<<8)+'F' },
 257     { CODEC_ID_VORBIS,          ('V'<<8)+'o' }, //HACK/FIXME, does vorbis in WAV/AVI have an (in)official id?
 258
 259     /* FIXME: All of the IDs below are not 16 bit and thus illegal. */
 260     // for NuppelVideo (nuv.c)
 261     { CODEC_ID_PCM_S16LE, MKTAG('R', 'A', 'W', 'A') },
 262     { CODEC_ID_MP3,       MKTAG('L', 'A', 'M', 'E') },
 263     { CODEC_ID_MP3,       MKTAG('M', 'P', '3', ' ') },
 264     { 0, 0 },
 265 };
 266
 267 #if CONFIG_MUXERS
 268 int64_t start_tag(ByteIOContext *pb, const char *tag)
 269 {
 270     put_tag(pb, tag);
 271     put_le32(pb, 0);
 272     return url_ftell(pb);
 273 }
 274
 275 void end_tag(ByteIOContext *pb, int64_t start)
 276 {
 277     int64_t pos;
 278
 279     pos = url_ftell(pb);
 280     url_fseek(pb, start - 4, SEEK_SET);
 281     put_le32(pb, (uint32_t)(pos - start));
 282     url_fseek(pb, pos, SEEK_SET);
 283 }
 284
 285 /* WAVEFORMATEX header */
 286 /* returns the size or -1 on error */
 287 int put_wav_header(ByteIOContext *pb, AVCodecContext *enc)
 288 {
 289     int bps, blkalign, bytespersec;
 290     int hdrsize = 18;
 291     int waveformatextensible;
 292     uint8_t temp[256];
 293     uint8_t *riff_extradata= temp;
 294     uint8_t *riff_extradata_start= temp;
 295
 296     if(!enc->codec_tag || enc->codec_tag > 0xffff)
 297         return -1;
 298     waveformatextensible = enc->channels > 2 && enc->channel_layout;
 299
 300     if (waveformatextensible) {
 301         put_le16(pb, 0xfffe);
 302     } else {
 303         put_le16(pb, enc->codec_tag);
 304     }
 305     put_le16(pb, enc->channels);
 306     put_le32(pb, enc->sample_rate);
 307     if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3 || enc->codec_id == CODEC_ID_GSM_MS) {
 308         bps = 0;
 309     } 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) { //
 310         bps = 4;
 311     } else {
 312         if (!(bps = av_get_bits_per_sample(enc->codec_id)))
 313             bps = 16; // default to 16
 314     }
 315     if(bps != enc->bits_per_coded_sample && enc->bits_per_coded_sample){
 316         av_log(enc, AV_LOG_WARNING, "requested bits_per_coded_sample (%d) and actually stored (%d) differ\n", enc->bits_per_coded_sample, bps);
 317     }
 318
 319     if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3 || enc->codec_id == CODEC_ID_AC3) {
 320         blkalign = enc->frame_size; //this is wrong, but it seems many demuxers do not work if this is set correctly
 321         //blkalign = 144 * enc->bit_rate/enc->sample_rate;
 322     } else if (enc->codec_id == CODEC_ID_ADPCM_G726) { //
 323         blkalign = 1;
 324     } else if (enc->block_align != 0) { /* specified by the codec */
 325         blkalign = enc->block_align;
 326     } else
 327         blkalign = enc->channels*bps >> 3;
 328     if (enc->codec_id == CODEC_ID_PCM_U8 ||
 329         enc->codec_id == CODEC_ID_PCM_S24LE ||
 330         enc->codec_id == CODEC_ID_PCM_S32LE ||
 331         enc->codec_id == CODEC_ID_PCM_F32LE ||
 332         enc->codec_id == CODEC_ID_PCM_F64LE ||
 333         enc->codec_id == CODEC_ID_PCM_S16LE) {
 334         bytespersec = enc->sample_rate * blkalign;
 335     } else {
 336         bytespersec = enc->bit_rate / 8;
 337     }
 338     put_le32(pb, bytespersec); /* bytes per second */
 339     put_le16(pb, blkalign); /* block align */
 340     put_le16(pb, bps); /* bits per sample */
 341     if (enc->codec_id == CODEC_ID_MP3) {
 342         hdrsize += 12;
 343         bytestream_put_le16(&riff_extradata, 1);    /* wID */
 344         bytestream_put_le32(&riff_extradata, 2);    /* fdwFlags */
 345         bytestream_put_le16(&riff_extradata, 1152); /* nBlockSize */
 346         bytestream_put_le16(&riff_extradata, 1);    /* nFramesPerBlock */
 347         bytestream_put_le16(&riff_extradata, 1393); /* nCodecDelay */
 348     } else if (enc->codec_id == CODEC_ID_MP2) {
 349         hdrsize += 22;
 350         bytestream_put_le16(&riff_extradata, 2);                          /* fwHeadLayer */
 351         bytestream_put_le32(&riff_extradata, enc->bit_rate);              /* dwHeadBitrate */
 352         bytestream_put_le16(&riff_extradata, enc->channels == 2 ? 1 : 8); /* fwHeadMode */
 353         bytestream_put_le16(&riff_extradata, 0);                          /* fwHeadModeExt */
 354         bytestream_put_le16(&riff_extradata, 1);                          /* wHeadEmphasis */
 355         bytestream_put_le16(&riff_extradata, 16);                         /* fwHeadFlags */
 356         bytestream_put_le32(&riff_extradata, 0);                          /* dwPTSLow */
 357         bytestream_put_le32(&riff_extradata, 0);                          /* dwPTSHigh */
 358     } else if (enc->codec_id == CODEC_ID_GSM_MS || enc->codec_id == CODEC_ID_ADPCM_IMA_WAV) {
 359         hdrsize += 2;
 360         bytestream_put_le16(&riff_extradata, enc->frame_size); /* wSamplesPerBlock */
 361     } else if(enc->extradata_size){
 362         riff_extradata_start= enc->extradata;
 363         riff_extradata= enc->extradata + enc->extradata_size;
 364         hdrsize += enc->extradata_size;
 365     } else if (!waveformatextensible){
 366         hdrsize -= 2;
 367     }
 368     if(waveformatextensible) {                                    /* write WAVEFORMATEXTENSIBLE extensions */
 369         hdrsize += 22;
 370         put_le16(pb, riff_extradata - riff_extradata_start + 22); /* 22 is WAVEFORMATEXTENSIBLE size */
 371         put_le16(pb, enc->bits_per_coded_sample);                 /* ValidBitsPerSample || SamplesPerBlock || Reserved */
 372         put_le32(pb, enc->channel_layout);                        /* dwChannelMask */
 373         put_le32(pb, enc->codec_tag);                             /* GUID + next 3 */
 374         put_le32(pb, 0x00100000);
 375         put_le32(pb, 0xAA000080);
 376         put_le32(pb, 0x719B3800);
 377     } else if(riff_extradata - riff_extradata_start) {
 378         put_le16(pb, riff_extradata - riff_extradata_start);
 379     }
 380     put_buffer(pb, riff_extradata_start, riff_extradata - riff_extradata_start);
 381     if(hdrsize&1){
 382         hdrsize++;
 383         put_byte(pb, 0);
 384     }
 385
 386     return hdrsize;
 387 }
 388
 389 /* BITMAPINFOHEADER header */
 390 void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf)
 391 {
 392     put_le32(pb, 40 + enc->extradata_size); /* size */
 393     put_le32(pb, enc->width);
 394     //We always store RGB TopDown
 395     put_le32(pb, enc->codec_tag ? enc->height : -enc->height);
 396     put_le16(pb, 1); /* planes */
 397
 398     put_le16(pb, enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24); /* depth */
 399     /* compression type */
 400     put_le32(pb, enc->codec_tag);
 401     put_le32(pb, enc->width * enc->height * 3);
 402     put_le32(pb, 0);
 403     put_le32(pb, 0);
 404     put_le32(pb, 0);
 405     put_le32(pb, 0);
 406
 407     put_buffer(pb, enc->extradata, enc->extradata_size);
 408
 409     if (enc->extradata_size & 1)
 410         put_byte(pb, 0);
 411 }
 412 #endif //CONFIG_MUXERS
 413
 414 #if CONFIG_DEMUXERS
 415 /* We could be given one of the three possible structures here:
 416  * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
 417  * is an expansion of the previous one with the fields added
 418  * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
 419  * WAVEFORMATEX adds 'WORD  cbSize' and basically makes itself
 420  * an openended structure.
 421  */
 422 void get_wav_header(ByteIOContext *pb, AVCodecContext *codec, int size)
 423 {
 424     int id;
 425
 426     id = get_le16(pb);
 427     codec->codec_type = CODEC_TYPE_AUDIO;
 428     codec->codec_tag = id;
 429     codec->channels = get_le16(pb);
 430     codec->sample_rate = get_le32(pb);
 431     codec->bit_rate = get_le32(pb) * 8;
 432     codec->block_align = get_le16(pb);
 433     if (size == 14) {  /* We're dealing with plain vanilla WAVEFORMAT */
 434         codec->bits_per_coded_sample = 8;
 435     }else
 436         codec->bits_per_coded_sample = get_le16(pb);
 437     if (size >= 18) {  /* We're obviously dealing with WAVEFORMATEX */
 438         int cbSize = get_le16(pb); /* cbSize */
 439         size -= 18;
 440         cbSize = FFMIN(size, cbSize);
 441         if (cbSize >= 22 && id == 0xfffe) { /* WAVEFORMATEXTENSIBLE */
 442             codec->bits_per_coded_sample = get_le16(pb);
 443             codec->channel_layout = get_le32(pb); /* dwChannelMask */
 444             id = get_le32(pb); /* 4 first bytes of GUID */
 445             url_fskip(pb, 12); /* skip end of GUID */
 446             cbSize -= 22;
 447             size -= 22;
 448         }
 449         codec->extradata_size = cbSize;
 450         if (cbSize > 0) {
 451             codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
 452             get_buffer(pb, codec->extradata, codec->extradata_size);
 453             size -= cbSize;
 454         }
 455
 456         /* It is possible for the chunk to contain garbage at the end */
 457         if (size > 0)
 458             url_fskip(pb, size);
 459     }
 460     codec->codec_id = wav_codec_get_id(id, codec->bits_per_coded_sample);
 461 }
 462
 463
 464 enum CodecID wav_codec_get_id(unsigned int tag, int bps)
 465 {
 466     enum CodecID id;
 467     id = codec_get_id(codec_wav_tags, tag);
 468     if (id <= 0)
 469         return id;
 470     /* handle specific u8 codec */
 471     if (id == CODEC_ID_PCM_S16LE && bps == 8)
 472         id = CODEC_ID_PCM_U8;
 473     if (id == CODEC_ID_PCM_S16LE && bps == 24)
 474         id = CODEC_ID_PCM_S24LE;
 475     if (id == CODEC_ID_PCM_S16LE && bps == 32)
 476         id = CODEC_ID_PCM_S32LE;
 477     if (id == CODEC_ID_PCM_F32LE && bps == 64)
 478         id = CODEC_ID_PCM_F64LE;
 479     if (id == CODEC_ID_ADPCM_IMA_WAV && bps == 8)
 480         id = CODEC_ID_PCM_ZORK;
 481     return id;
 482 }
 483 #endif // CONFIG_DEMUXERS
 484
 485 void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale)
 486 {
 487     int gcd;
 488
 489     *au_ssize= stream->block_align;
 490     if(stream->frame_size && stream->sample_rate){
 491         *au_scale=stream->frame_size;
 492         *au_rate= stream->sample_rate;
 493     }else if(stream->codec_type == CODEC_TYPE_VIDEO){
 494         *au_scale= stream->time_base.num;
 495         *au_rate = stream->time_base.den;
 496     }else{
 497         *au_scale= stream->block_align ? stream->block_align*8 : 8;
 498         *au_rate = stream->bit_rate ? stream->bit_rate : 8*stream->sample_rate;
 499     }
 500     gcd= av_gcd(*au_scale, *au_rate);
 501     *au_scale /= gcd;
 502     *au_rate /= gcd;
 503 }