FFmpeg: libavformat/riff.c Source File

00001 /*
00002  * RIFF codec tags
00003  * Copyright (c) 2000 Fabrice Bellard
00004  *
00005  * This file is part of FFmpeg.
00006  *
00007  * FFmpeg is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * FFmpeg is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with FFmpeg; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00022 #include "libavcodec/avcodec.h"
00023 #include "avformat.h"
00024 #include "riff.h"
00025 
00026 /* Note: when encoding, the first matching tag is used, so order is
00027    important if multiple tags possible for a given codec. */
00028 const AVCodecTag codec_bmp_tags[] = {
00029     { CODEC_ID_H264,         MKTAG('H', '2', '6', '4') },
00030     { CODEC_ID_H264,         MKTAG('h', '2', '6', '4') },
00031     { CODEC_ID_H264,         MKTAG('X', '2', '6', '4') },
00032     { CODEC_ID_H264,         MKTAG('x', '2', '6', '4') },
00033     { CODEC_ID_H264,         MKTAG('a', 'v', 'c', '1') },
00034     { CODEC_ID_H264,         MKTAG('V', 'S', 'S', 'H') },
00035     { CODEC_ID_H263,         MKTAG('H', '2', '6', '3') },
00036     { CODEC_ID_H263,         MKTAG('X', '2', '6', '3') },
00037     { CODEC_ID_H263,         MKTAG('T', '2', '6', '3') },
00038     { CODEC_ID_H263,         MKTAG('L', '2', '6', '3') },
00039     { CODEC_ID_H263,         MKTAG('V', 'X', '1', 'K') },
00040     { CODEC_ID_H263P,        MKTAG('H', '2', '6', '3') },
00041     { CODEC_ID_H263I,        MKTAG('I', '2', '6', '3') }, /* intel h263 */
00042     { CODEC_ID_H261,         MKTAG('H', '2', '6', '1') },
00043     { CODEC_ID_H263P,        MKTAG('U', '2', '6', '3') },
00044     { CODEC_ID_H263P,        MKTAG('v', 'i', 'v', '1') },
00045     { CODEC_ID_MPEG4,        MKTAG('F', 'M', 'P', '4') },
00046     { CODEC_ID_MPEG4,        MKTAG('D', 'I', 'V', 'X') },
00047     { CODEC_ID_MPEG4,        MKTAG('D', 'X', '5', '0') },
00048     { CODEC_ID_MPEG4,        MKTAG('X', 'V', 'I', 'D') },
00049     { CODEC_ID_MPEG4,        MKTAG('M', 'P', '4', 'S') },
00050     { CODEC_ID_MPEG4,        MKTAG('M', '4', 'S', '2') },
00051     { CODEC_ID_MPEG4,        MKTAG( 4 ,  0 ,  0 ,  0 ) }, /* some broken avi use this */
00052     { CODEC_ID_MPEG4,        MKTAG('D', 'I', 'V', '1') },
00053     { CODEC_ID_MPEG4,        MKTAG('B', 'L', 'Z', '0') },
00054     { CODEC_ID_MPEG4,        MKTAG('m', 'p', '4', 'v') },
00055     { CODEC_ID_MPEG4,        MKTAG('U', 'M', 'P', '4') },
00056     { CODEC_ID_MPEG4,        MKTAG('W', 'V', '1', 'F') },
00057     { CODEC_ID_MPEG4,        MKTAG('S', 'E', 'D', 'G') },
00058     { CODEC_ID_MPEG4,        MKTAG('R', 'M', 'P', '4') },
00059     { CODEC_ID_MPEG4,        MKTAG('3', 'I', 'V', '2') },
00060     { CODEC_ID_MPEG4,        MKTAG('F', 'F', 'D', 'S') },
00061     { CODEC_ID_MPEG4,        MKTAG('F', 'V', 'F', 'W') },
00062     { CODEC_ID_MPEG4,        MKTAG('D', 'C', 'O', 'D') },
00063     { CODEC_ID_MPEG4,        MKTAG('M', 'V', 'X', 'M') },
00064     { CODEC_ID_MPEG4,        MKTAG('P', 'M', '4', 'V') },
00065     { CODEC_ID_MPEG4,        MKTAG('S', 'M', 'P', '4') },
00066     { CODEC_ID_MPEG4,        MKTAG('D', 'X', 'G', 'M') },
00067     { CODEC_ID_MPEG4,        MKTAG('V', 'I', 'D', 'M') },
00068     { CODEC_ID_MPEG4,        MKTAG('M', '4', 'T', '3') },
00069     { CODEC_ID_MPEG4,        MKTAG('G', 'E', 'O', 'X') },
00070     { CODEC_ID_MPEG4,        MKTAG('H', 'D', 'X', '4') }, /* flipped video */
00071     { CODEC_ID_MPEG4,        MKTAG('D', 'M', 'K', '2') },
00072     { CODEC_ID_MPEG4,        MKTAG('D', 'I', 'G', 'I') },
00073     { CODEC_ID_MPEG4,        MKTAG('I', 'N', 'M', 'C') },
00074     { CODEC_ID_MPEG4,        MKTAG('E', 'P', 'H', 'V') }, /* Ephv MPEG-4 */
00075     { CODEC_ID_MPEG4,        MKTAG('E', 'M', '4', 'A') },
00076     { CODEC_ID_MPEG4,        MKTAG('M', '4', 'C', 'C') }, /* Divio MPEG-4 */
00077     { CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '3') }, /* default signature when using MSMPEG4 */
00078     { CODEC_ID_MSMPEG4V3,    MKTAG('M', 'P', '4', '3') },
00079     { CODEC_ID_MSMPEG4V3,    MKTAG('M', 'P', 'G', '3') },
00080     { CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '5') },
00081     { CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '6') },
00082     { CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '4') },
00083     { CODEC_ID_MSMPEG4V3,    MKTAG('D', 'V', 'X', '3') },
00084     { CODEC_ID_MSMPEG4V3,    MKTAG('A', 'P', '4', '1') },
00085     { CODEC_ID_MSMPEG4V3,    MKTAG('C', 'O', 'L', '1') },
00086     { CODEC_ID_MSMPEG4V3,    MKTAG('C', 'O', 'L', '0') },
00087     { CODEC_ID_MSMPEG4V2,    MKTAG('M', 'P', '4', '2') },
00088     { CODEC_ID_MSMPEG4V2,    MKTAG('D', 'I', 'V', '2') },
00089     { CODEC_ID_MSMPEG4V1,    MKTAG('M', 'P', 'G', '4') },
00090     { CODEC_ID_MSMPEG4V1,    MKTAG('M', 'P', '4', '1') },
00091     { CODEC_ID_WMV1,         MKTAG('W', 'M', 'V', '1') },
00092     { CODEC_ID_WMV2,         MKTAG('W', 'M', 'V', '2') },
00093     { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 's', 'd') },
00094     { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'h', 'd') },
00095     { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 's', 'l') },
00096     { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', '2', '5') },
00097     { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', '5', '0') },
00098     { CODEC_ID_DVVIDEO,      MKTAG('c', 'd', 'v', 'c') }, /* Canopus DV */
00099     { CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'c', ' ') },
00100     { CODEC_ID_MPEG1VIDEO,   MKTAG('m', 'p', 'g', '1') },
00101     { CODEC_ID_MPEG1VIDEO,   MKTAG('m', 'p', 'g', '2') },
00102     { CODEC_ID_MPEG2VIDEO,   MKTAG('m', 'p', 'g', '2') },
00103     { CODEC_ID_MPEG2VIDEO,   MKTAG('M', 'P', 'E', 'G') },
00104     { CODEC_ID_MPEG1VIDEO,   MKTAG('P', 'I', 'M', '1') },
00105     { CODEC_ID_MPEG2VIDEO,   MKTAG('P', 'I', 'M', '2') },
00106     { CODEC_ID_MPEG1VIDEO,   MKTAG('V', 'C', 'R', '2') },
00107     { CODEC_ID_MPEG1VIDEO,   MKTAG( 1 ,  0 ,  0 ,  16) },
00108     { CODEC_ID_MPEG2VIDEO,   MKTAG( 2 ,  0 ,  0 ,  16) },
00109     { CODEC_ID_MPEG2VIDEO,   MKTAG('D', 'V', 'R', ' ') },
00110     { CODEC_ID_MPEG2VIDEO,   MKTAG('M', 'M', 'E', 'S') },
00111     { CODEC_ID_MPEG2VIDEO,   MKTAG('L', 'M', 'P', '2') }, /* Lead MPEG2 in avi */
00112     { CODEC_ID_MJPEG,        MKTAG('M', 'J', 'P', 'G') },
00113     { CODEC_ID_MJPEG,        MKTAG('L', 'J', 'P', 'G') },
00114     { CODEC_ID_MJPEG,        MKTAG('d', 'm', 'b', '1') },
00115     { CODEC_ID_LJPEG,        MKTAG('L', 'J', 'P', 'G') },
00116     { CODEC_ID_MJPEG,        MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */
00117     { CODEC_ID_JPEGLS,       MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - encoder */
00118     { CODEC_ID_MJPEG,        MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - decoder */
00119     { CODEC_ID_MJPEG,        MKTAG('j', 'p', 'e', 'g') },
00120     { CODEC_ID_MJPEG,        MKTAG('I', 'J', 'P', 'G') },
00121     { CODEC_ID_MJPEG,        MKTAG('A', 'V', 'R', 'n') },
00122     { CODEC_ID_MJPEG,        MKTAG('A', 'C', 'D', 'V') },
00123     { CODEC_ID_MJPEG,        MKTAG('Q', 'I', 'V', 'G') },
00124     { CODEC_ID_MJPEG,        MKTAG('S', 'L', 'M', 'J') }, /* SL M-JPEG */
00125     { CODEC_ID_MJPEG,        MKTAG('C', 'J', 'P', 'G') }, /* Creative Webcam JPEG */
00126     { CODEC_ID_HUFFYUV,      MKTAG('H', 'F', 'Y', 'U') },
00127     { CODEC_ID_FFVHUFF,      MKTAG('F', 'F', 'V', 'H') },
00128     { CODEC_ID_CYUV,         MKTAG('C', 'Y', 'U', 'V') },
00129     { CODEC_ID_RAWVIDEO,     MKTAG( 0 ,  0 ,  0 ,  0 ) },
00130     { CODEC_ID_RAWVIDEO,     MKTAG('I', '4', '2', '0') },
00131     { CODEC_ID_RAWVIDEO,     MKTAG('Y', 'U', 'Y', '2') },
00132     { CODEC_ID_RAWVIDEO,     MKTAG('Y', '4', '2', '2') },
00133     { CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', '1', '2') },
00134     { CODEC_ID_RAWVIDEO,     MKTAG('U', 'Y', 'V', 'Y') },
00135     { CODEC_ID_RAWVIDEO,     MKTAG('I', 'Y', 'U', 'V') },
00136     { CODEC_ID_RAWVIDEO,     MKTAG('Y', '8', '0', '0') },
00137     { CODEC_ID_RAWVIDEO,     MKTAG('H', 'D', 'Y', 'C') },
00138     { CODEC_ID_INDEO3,       MKTAG('I', 'V', '3', '1') },
00139     { CODEC_ID_INDEO3,       MKTAG('I', 'V', '3', '2') },
00140     { CODEC_ID_INDEO4,       MKTAG('I', 'V', '4', '1') },
00141     { CODEC_ID_INDEO5,       MKTAG('I', 'V', '5', '0') },
00142     { CODEC_ID_VP3,          MKTAG('V', 'P', '3', '1') },
00143     { CODEC_ID_VP3,          MKTAG('V', 'P', '3', '0') },
00144     { CODEC_ID_VP5,          MKTAG('V', 'P', '5', '0') },
00145     { CODEC_ID_VP6,          MKTAG('V', 'P', '6', '0') },
00146     { CODEC_ID_VP6,          MKTAG('V', 'P', '6', '1') },
00147     { CODEC_ID_VP6,          MKTAG('V', 'P', '6', '2') },
00148     { CODEC_ID_ASV1,         MKTAG('A', 'S', 'V', '1') },
00149     { CODEC_ID_ASV2,         MKTAG('A', 'S', 'V', '2') },
00150     { CODEC_ID_VCR1,         MKTAG('V', 'C', 'R', '1') },
00151     { CODEC_ID_FFV1,         MKTAG('F', 'F', 'V', '1') },
00152     { CODEC_ID_XAN_WC4,      MKTAG('X', 'x', 'a', 'n') },
00153     { CODEC_ID_MIMIC,        MKTAG('L', 'M', '2', '0') },
00154     { CODEC_ID_MSRLE,        MKTAG('m', 'r', 'l', 'e') },
00155     { CODEC_ID_MSRLE,        MKTAG( 1 ,  0 ,  0 ,  0 ) },
00156     { CODEC_ID_MSRLE,        MKTAG( 2 ,  0 ,  0 ,  0 ) },
00157     { CODEC_ID_MSVIDEO1,     MKTAG('M', 'S', 'V', 'C') },
00158     { CODEC_ID_MSVIDEO1,     MKTAG('m', 's', 'v', 'c') },
00159     { CODEC_ID_MSVIDEO1,     MKTAG('C', 'R', 'A', 'M') },
00160     { CODEC_ID_MSVIDEO1,     MKTAG('c', 'r', 'a', 'm') },
00161     { CODEC_ID_MSVIDEO1,     MKTAG('W', 'H', 'A', 'M') },
00162     { CODEC_ID_MSVIDEO1,     MKTAG('w', 'h', 'a', 'm') },
00163     { CODEC_ID_CINEPAK,      MKTAG('c', 'v', 'i', 'd') },
00164     { CODEC_ID_TRUEMOTION1,  MKTAG('D', 'U', 'C', 'K') },
00165     { CODEC_ID_TRUEMOTION1,  MKTAG('P', 'V', 'E', 'Z') },
00166     { CODEC_ID_MSZH,         MKTAG('M', 'S', 'Z', 'H') },
00167     { CODEC_ID_ZLIB,         MKTAG('Z', 'L', 'I', 'B') },
00168     { CODEC_ID_SNOW,         MKTAG('S', 'N', 'O', 'W') },
00169     { CODEC_ID_4XM,          MKTAG('4', 'X', 'M', 'V') },
00170     { CODEC_ID_FLV1,         MKTAG('F', 'L', 'V', '1') },
00171     { CODEC_ID_FLASHSV,      MKTAG('F', 'S', 'V', '1') },
00172     { CODEC_ID_VP6F,         MKTAG('V', 'P', '6', 'F') },
00173     { CODEC_ID_SVQ1,         MKTAG('s', 'v', 'q', '1') },
00174     { CODEC_ID_TSCC,         MKTAG('t', 's', 'c', 'c') },
00175     { CODEC_ID_ULTI,         MKTAG('U', 'L', 'T', 'I') },
00176     { CODEC_ID_VIXL,         MKTAG('V', 'I', 'X', 'L') },
00177     { CODEC_ID_QPEG,         MKTAG('Q', 'P', 'E', 'G') },
00178     { CODEC_ID_QPEG,         MKTAG('Q', '1', '.', '0') },
00179     { CODEC_ID_QPEG,         MKTAG('Q', '1', '.', '1') },
00180     { CODEC_ID_WMV3,         MKTAG('W', 'M', 'V', '3') },
00181     { CODEC_ID_VC1,          MKTAG('W', 'V', 'C', '1') },
00182     { CODEC_ID_VC1,          MKTAG('W', 'M', 'V', 'A') },
00183     { CODEC_ID_LOCO,         MKTAG('L', 'O', 'C', 'O') },
00184     { CODEC_ID_WNV1,         MKTAG('W', 'N', 'V', '1') },
00185     { CODEC_ID_AASC,         MKTAG('A', 'A', 'S', 'C') },
00186     { CODEC_ID_INDEO2,       MKTAG('R', 'T', '2', '1') },
00187     { CODEC_ID_FRAPS,        MKTAG('F', 'P', 'S', '1') },
00188     { CODEC_ID_THEORA,       MKTAG('t', 'h', 'e', 'o') },
00189     { CODEC_ID_TRUEMOTION2,  MKTAG('T', 'M', '2', '0') },
00190     { CODEC_ID_CSCD,         MKTAG('C', 'S', 'C', 'D') },
00191     { CODEC_ID_ZMBV,         MKTAG('Z', 'M', 'B', 'V') },
00192     { CODEC_ID_KMVC,         MKTAG('K', 'M', 'V', 'C') },
00193     { CODEC_ID_CAVS,         MKTAG('C', 'A', 'V', 'S') },
00194     { CODEC_ID_JPEG2000,     MKTAG('M', 'J', '2', 'C') },
00195     { CODEC_ID_VMNC,         MKTAG('V', 'M', 'n', 'c') },
00196     { CODEC_ID_TARGA,        MKTAG('t', 'g', 'a', ' ') },
00197     { CODEC_ID_PNG,          MKTAG('M', 'P', 'N', 'G') },
00198     { CODEC_ID_CLJR,         MKTAG('c', 'l', 'j', 'r') },
00199     { CODEC_ID_DIRAC,        MKTAG('d', 'r', 'a', 'c') },
00200     { CODEC_ID_RPZA,         MKTAG('a', 'z', 'p', 'r') },
00201     { CODEC_ID_RPZA,         MKTAG('R', 'P', 'Z', 'A') },
00202     { CODEC_ID_RPZA,         MKTAG('r', 'p', 'z', 'a') },
00203     { CODEC_ID_SP5X,         MKTAG('S', 'P', '5', '4') },
00204     { CODEC_ID_NONE,         0 }
00205 };
00206 
00207 const AVCodecTag codec_wav_tags[] = {
00208     { CODEC_ID_PCM_S16LE,       0x0001 },
00209     { CODEC_ID_PCM_U8,          0x0001 }, /* must come after s16le in this list */
00210     { CODEC_ID_PCM_S24LE,       0x0001 },
00211     { CODEC_ID_PCM_S32LE,       0x0001 },
00212     { CODEC_ID_ADPCM_MS,        0x0002 },
00213     { CODEC_ID_PCM_F32LE,       0x0003 },
00214     { CODEC_ID_PCM_F64LE,       0x0003 }, /* must come after f32le in this list */
00215     { CODEC_ID_PCM_ALAW,        0x0006 },
00216     { CODEC_ID_PCM_MULAW,       0x0007 },
00217     { CODEC_ID_WMAVOICE,        0x000A },
00218     { CODEC_ID_ADPCM_IMA_WAV,   0x0011 },
00219     { CODEC_ID_PCM_ZORK,        0x0011 }, /* must come after adpcm_ima_wav in this list */
00220     { CODEC_ID_ADPCM_YAMAHA,    0x0020 },
00221     { CODEC_ID_TRUESPEECH,      0x0022 },
00222     { CODEC_ID_GSM_MS,          0x0031 },
00223     { CODEC_ID_ADPCM_G726,      0x0045 },
00224     { CODEC_ID_MP2,             0x0050 },
00225     { CODEC_ID_MP3,             0x0055 },
00226     { CODEC_ID_AMR_NB,          0x0057 },
00227     { CODEC_ID_AMR_WB,          0x0058 },
00228     { CODEC_ID_ADPCM_IMA_DK4,   0x0061 },  /* rogue format number */
00229     { CODEC_ID_ADPCM_IMA_DK3,   0x0062 },  /* rogue format number */
00230     { CODEC_ID_ADPCM_IMA_WAV,   0x0069 },
00231     { CODEC_ID_VOXWARE,         0x0075 },
00232     { CODEC_ID_AAC,             0x00ff },
00233     { CODEC_ID_SIPR,            0x0130 },
00234     { CODEC_ID_WMAV1,           0x0160 },
00235     { CODEC_ID_WMAV2,           0x0161 },
00236     { CODEC_ID_WMAPRO,          0x0162 },
00237     { CODEC_ID_WMALOSSLESS,     0x0163 },
00238     { CODEC_ID_ADPCM_CT,        0x0200 },
00239     { CODEC_ID_ATRAC3,          0x0270 },
00240     { CODEC_ID_IMC,             0x0401 },
00241     { CODEC_ID_AC3,             0x2000 },
00242     { CODEC_ID_DTS,             0x2001 },
00243     { CODEC_ID_SONIC,           0x2048 },
00244     { CODEC_ID_SONIC_LS,        0x2048 },
00245     { CODEC_ID_AAC,             0x706d },
00246     { CODEC_ID_AAC,             0x4143 },
00247     { CODEC_ID_FLAC,            0xF1AC },
00248     { CODEC_ID_ADPCM_SWF,       ('S'<<8)+'F' },
00249     { CODEC_ID_VORBIS,          ('V'<<8)+'o' }, //HACK/FIXME, does vorbis in WAV/AVI have an (in)official id?
00250 
00251     /* FIXME: All of the IDs below are not 16 bit and thus illegal. */
00252     // for NuppelVideo (nuv.c)
00253     { CODEC_ID_PCM_S16LE, MKTAG('R', 'A', 'W', 'A') },
00254     { CODEC_ID_MP3,       MKTAG('L', 'A', 'M', 'E') },
00255     { CODEC_ID_MP3,       MKTAG('M', 'P', '3', ' ') },
00256     { 0, 0 },
00257 };
00258 
00259 #if CONFIG_MUXERS
00260 int64_t start_tag(ByteIOContext *pb, const char *tag)
00261 {
00262     put_tag(pb, tag);
00263     put_le32(pb, 0);
00264     return url_ftell(pb);
00265 }
00266 
00267 void end_tag(ByteIOContext *pb, int64_t start)
00268 {
00269     int64_t pos;
00270 
00271     pos = url_ftell(pb);
00272     url_fseek(pb, start - 4, SEEK_SET);
00273     put_le32(pb, (uint32_t)(pos - start));
00274     url_fseek(pb, pos, SEEK_SET);
00275 }
00276 
00277 /* WAVEFORMATEX header */
00278 /* returns the size or -1 on error */
00279 int put_wav_header(ByteIOContext *pb, AVCodecContext *enc)
00280 {
00281     int bps, blkalign, bytespersec;
00282     int hdrsize = 18;
00283 
00284     if(!enc->codec_tag || enc->codec_tag > 0xffff)
00285         return -1;
00286 
00287     put_le16(pb, enc->codec_tag);
00288     put_le16(pb, enc->channels);
00289     put_le32(pb, enc->sample_rate);
00290     if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3 || enc->codec_id == CODEC_ID_GSM_MS) {
00291         bps = 0;
00292     } 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) { //
00293         bps = 4;
00294     } else {
00295         if (!(bps = av_get_bits_per_sample(enc->codec_id)))
00296             bps = 16; // default to 16
00297     }
00298     if(bps != enc->bits_per_coded_sample && enc->bits_per_coded_sample){
00299         av_log(enc, AV_LOG_WARNING, "requested bits_per_coded_sample (%d) and actually stored (%d) differ\n", enc->bits_per_coded_sample, bps);
00300     }
00301 
00302     if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3 || enc->codec_id == CODEC_ID_AC3) {
00303         blkalign = enc->frame_size; //this is wrong, but it seems many demuxers do not work if this is set correctly
00304         //blkalign = 144 * enc->bit_rate/enc->sample_rate;
00305     } else if (enc->codec_id == CODEC_ID_ADPCM_G726) { //
00306         blkalign = 1;
00307     } else if (enc->block_align != 0) { /* specified by the codec */
00308         blkalign = enc->block_align;
00309     } else
00310         blkalign = enc->channels*bps >> 3;
00311     if (enc->codec_id == CODEC_ID_PCM_U8 ||
00312         enc->codec_id == CODEC_ID_PCM_S24LE ||
00313         enc->codec_id == CODEC_ID_PCM_S32LE ||
00314         enc->codec_id == CODEC_ID_PCM_F32LE ||
00315         enc->codec_id == CODEC_ID_PCM_F64LE ||
00316         enc->codec_id == CODEC_ID_PCM_S16LE) {
00317         bytespersec = enc->sample_rate * blkalign;
00318     } else {
00319         bytespersec = enc->bit_rate / 8;
00320     }
00321     put_le32(pb, bytespersec); /* bytes per second */
00322     put_le16(pb, blkalign); /* block align */
00323     put_le16(pb, bps); /* bits per sample */
00324     if (enc->codec_id == CODEC_ID_MP3) {
00325         put_le16(pb, 12); /* wav_extra_size */
00326         hdrsize += 12;
00327         put_le16(pb, 1); /* wID */
00328         put_le32(pb, 2); /* fdwFlags */
00329         put_le16(pb, 1152); /* nBlockSize */
00330         put_le16(pb, 1); /* nFramesPerBlock */
00331         put_le16(pb, 1393); /* nCodecDelay */
00332     } else if (enc->codec_id == CODEC_ID_MP2) {
00333         put_le16(pb, 22); /* wav_extra_size */
00334         hdrsize += 22;
00335         put_le16(pb, 2);  /* fwHeadLayer */
00336         put_le32(pb, enc->bit_rate); /* dwHeadBitrate */
00337         put_le16(pb, enc->channels == 2 ? 1 : 8); /* fwHeadMode */
00338         put_le16(pb, 0);  /* fwHeadModeExt */
00339         put_le16(pb, 1);  /* wHeadEmphasis */
00340         put_le16(pb, 16); /* fwHeadFlags */
00341         put_le32(pb, 0);  /* dwPTSLow */
00342         put_le32(pb, 0);  /* dwPTSHigh */
00343     } else if (enc->codec_id == CODEC_ID_GSM_MS) {
00344         put_le16(pb, 2); /* wav_extra_size */
00345         hdrsize += 2;
00346         put_le16(pb, enc->frame_size); /* wSamplesPerBlock */
00347     } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV) {
00348         put_le16(pb, 2); /* wav_extra_size */
00349         hdrsize += 2;
00350         put_le16(pb, enc->frame_size); /* wSamplesPerBlock */
00351     } else if(enc->extradata_size){
00352         put_le16(pb, enc->extradata_size);
00353         put_buffer(pb, enc->extradata, enc->extradata_size);
00354         hdrsize += enc->extradata_size;
00355         if(hdrsize&1){
00356             hdrsize++;
00357             put_byte(pb, 0);
00358         }
00359     } else {
00360         hdrsize -= 2;
00361     }
00362 
00363     return hdrsize;
00364 }
00365 
00366 /* BITMAPINFOHEADER header */
00367 void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf)
00368 {
00369     put_le32(pb, 40 + enc->extradata_size); /* size */
00370     put_le32(pb, enc->width);
00371     //We always store RGB TopDown
00372     put_le32(pb, enc->codec_tag ? enc->height : -enc->height);
00373     put_le16(pb, 1); /* planes */
00374 
00375     put_le16(pb, enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24); /* depth */
00376     /* compression type */
00377     put_le32(pb, enc->codec_tag);
00378     put_le32(pb, enc->width * enc->height * 3);
00379     put_le32(pb, 0);
00380     put_le32(pb, 0);
00381     put_le32(pb, 0);
00382     put_le32(pb, 0);
00383 
00384     put_buffer(pb, enc->extradata, enc->extradata_size);
00385 
00386     if (enc->extradata_size & 1)
00387         put_byte(pb, 0);
00388 }
00389 #endif //CONFIG_MUXERS
00390 
00391 #if CONFIG_DEMUXERS
00392 /* We could be given one of the three possible structures here:
00393  * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
00394  * is an expansion of the previous one with the fields added
00395  * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
00396  * WAVEFORMATEX adds 'WORD  cbSize' and basically makes itself
00397  * an openended structure.
00398  */
00399 void get_wav_header(ByteIOContext *pb, AVCodecContext *codec, int size)
00400 {
00401     int id;
00402 
00403     id = get_le16(pb);
00404     codec->codec_type = CODEC_TYPE_AUDIO;
00405     codec->codec_tag = id;
00406     codec->channels = get_le16(pb);
00407     codec->sample_rate = get_le32(pb);
00408     codec->bit_rate = get_le32(pb) * 8;
00409     codec->block_align = get_le16(pb);
00410     if (size == 14) {  /* We're dealing with plain vanilla WAVEFORMAT */
00411         codec->bits_per_coded_sample = 8;
00412     }else
00413         codec->bits_per_coded_sample = get_le16(pb);
00414     if (size >= 18) {  /* We're obviously dealing with WAVEFORMATEX */
00415         int cbSize = get_le16(pb); /* cbSize */
00416         size -= 18;
00417         cbSize = FFMIN(size, cbSize);
00418         if (cbSize >= 22 && id == 0xfffe) { /* WAVEFORMATEXTENSIBLE */
00419             codec->bits_per_coded_sample = get_le16(pb);
00420             codec->channel_layout = get_le32(pb); /* dwChannelMask */
00421             id = get_le32(pb); /* 4 first bytes of GUID */
00422             url_fskip(pb, 12); /* skip end of GUID */
00423             cbSize -= 22;
00424             size -= 22;
00425         }
00426         codec->extradata_size = cbSize;
00427         if (cbSize > 0) {
00428             codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
00429             get_buffer(pb, codec->extradata, codec->extradata_size);
00430             size -= cbSize;
00431         }
00432 
00433         /* It is possible for the chunk to contain garbage at the end */
00434         if (size > 0)
00435             url_fskip(pb, size);
00436     }
00437     codec->codec_id = wav_codec_get_id(id, codec->bits_per_coded_sample);
00438 }
00439 
00440 
00441 enum CodecID wav_codec_get_id(unsigned int tag, int bps)
00442 {
00443     enum CodecID id;
00444     id = codec_get_id(codec_wav_tags, tag);
00445     if (id <= 0)
00446         return id;
00447     /* handle specific u8 codec */
00448     if (id == CODEC_ID_PCM_S16LE && bps == 8)
00449         id = CODEC_ID_PCM_U8;
00450     if (id == CODEC_ID_PCM_S16LE && bps == 24)
00451         id = CODEC_ID_PCM_S24LE;
00452     if (id == CODEC_ID_PCM_S16LE && bps == 32)
00453         id = CODEC_ID_PCM_S32LE;
00454     if (id == CODEC_ID_PCM_F32LE && bps == 64)
00455         id = CODEC_ID_PCM_F64LE;
00456     if (id == CODEC_ID_ADPCM_IMA_WAV && bps == 8)
00457         id = CODEC_ID_PCM_ZORK;
00458     return id;
00459 }
00460 #endif // CONFIG_DEMUXERS
00461 
00462 void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale)
00463 {
00464     int gcd;
00465 
00466     *au_ssize= stream->block_align;
00467     if(stream->frame_size && stream->sample_rate){
00468         *au_scale=stream->frame_size;
00469         *au_rate= stream->sample_rate;
00470     }else if(stream->codec_type == CODEC_TYPE_VIDEO){
00471         *au_scale= stream->time_base.num;
00472         *au_rate = stream->time_base.den;
00473     }else{
00474         *au_scale= stream->block_align ? stream->block_align*8 : 8;
00475         *au_rate = stream->bit_rate ? stream->bit_rate : 8*stream->sample_rate;
00476     }
00477     gcd= av_gcd(*au_scale, *au_rate);
00478     *au_scale /= gcd;
00479     *au_rate /= gcd;
00480 }