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ffmpeg / libavformat / riff.c @ f31065f6

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1
/*
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 * RIFF codec tags
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 * Copyright (c) 2000 Fabrice Bellard.
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
19

    
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#include "avformat.h"
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#include "avcodec.h"
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#include "riff.h"
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24
/* Note: when encoding, the first matching tag is used, so order is
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   important if multiple tags possible for a given codec. */
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const CodecTag codec_bmp_tags[] = {
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    { CODEC_ID_H264, MKTAG('H', '2', '6', '4') },
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    { CODEC_ID_H264, MKTAG('h', '2', '6', '4') },
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    { CODEC_ID_H264, MKTAG('X', '2', '6', '4') },
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    { CODEC_ID_H264, MKTAG('x', '2', '6', '4') },
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    { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') },
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    { CODEC_ID_H264, MKTAG('V', 'S', 'S', 'H') },
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    { CODEC_ID_H263, MKTAG('H', '2', '6', '3') },
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    { CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },
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    { CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
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    { CODEC_ID_H261, MKTAG('H', '2', '6', '1') },
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    /* added based on MPlayer */
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    { CODEC_ID_H263P, MKTAG('U', '2', '6', '3') },
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    { CODEC_ID_H263P, MKTAG('v', 'i', 'v', '1') },
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    { CODEC_ID_MPEG4, MKTAG('F', 'M', 'P', '4')},
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    { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X'), .invalid_asf = 1 },
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    { CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0'), .invalid_asf = 1 },
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    { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D'), .invalid_asf = 1 },
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    { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
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    { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
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    { CODEC_ID_MPEG4, MKTAG(0x04, 0, 0, 0) }, /* some broken avi use this */
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    /* added based on MPlayer */
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    { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', '1') },
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    { CODEC_ID_MPEG4, MKTAG('B', 'L', 'Z', '0') },
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    { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
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    { CODEC_ID_MPEG4, MKTAG('U', 'M', 'P', '4') },
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    { CODEC_ID_MPEG4, MKTAG('W', 'V', '1', 'F') },
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    { CODEC_ID_MPEG4, MKTAG('S', 'E', 'D', 'G') },
58

    
59
    { CODEC_ID_MPEG4, MKTAG('R', 'M', 'P', '4') },
60

    
61
    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3'), .invalid_asf = 1 }, /* default signature when using MSMPEG4 */
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    { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
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64
    /* added based on MPlayer */
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    { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', 'G', '3') },
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    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '5') },
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    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '6') },
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    { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '4') },
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    { CODEC_ID_MSMPEG4V3, MKTAG('A', 'P', '4', '1') },
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    { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '1') },
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    { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '0') },
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73
    { CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') },
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    /* added based on MPlayer */
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    { CODEC_ID_MSMPEG4V2, MKTAG('D', 'I', 'V', '2') },
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    { CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') },
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    { CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') },
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82
    /* added based on MPlayer */
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    { CODEC_ID_WMV2, MKTAG('W', 'M', 'V', '2') },
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    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') },
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    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') },
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    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') },
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    { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '2', '5') },
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    { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') },
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    { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') },
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    { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'p', 'g', '2') },
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    { CODEC_ID_MPEG2VIDEO, MKTAG('M', 'P', 'E', 'G') },
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    { CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') },
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    { CODEC_ID_MPEG1VIDEO, MKTAG('V', 'C', 'R', '2') },
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    { CODEC_ID_MPEG1VIDEO, 0x10000001 },
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    { CODEC_ID_MPEG2VIDEO, 0x10000002 },
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    { CODEC_ID_MPEG2VIDEO, MKTAG('D', 'V', 'R', ' ') },
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    { CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
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    { CODEC_ID_MJPEG, MKTAG('L', 'J', 'P', 'G') },
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    { CODEC_ID_LJPEG, MKTAG('L', 'J', 'P', 'G') },
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    { CODEC_ID_MJPEG, MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */
101
    { CODEC_ID_MJPEG, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - decoder */
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    { CODEC_ID_JPEGLS, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - encoder */
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    { CODEC_ID_HUFFYUV, MKTAG('H', 'F', 'Y', 'U') },
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    { CODEC_ID_FFVHUFF, MKTAG('F', 'F', 'V', 'H') },
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    { CODEC_ID_CYUV, MKTAG('C', 'Y', 'U', 'V') },
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    { CODEC_ID_RAWVIDEO, MKTAG('I', '4', '2', '0') },
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    { CODEC_ID_RAWVIDEO, MKTAG('Y', 'U', 'Y', '2') },
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    { CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '2', '2') },
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    { CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', '1', '2') },
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    { CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'V', 'Y') },
111
    { CODEC_ID_RAWVIDEO, MKTAG('I', 'Y', 'U', 'V') },
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    { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '1') },
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    { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '2') },
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    { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') },
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    { CODEC_ID_VP3, MKTAG('V', 'P', '3', '0') },
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    { CODEC_ID_ASV1, MKTAG('A', 'S', 'V', '1') },
117
    { CODEC_ID_ASV2, MKTAG('A', 'S', 'V', '2') },
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    { CODEC_ID_VCR1, MKTAG('V', 'C', 'R', '1') },
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    { CODEC_ID_FFV1, MKTAG('F', 'F', 'V', '1') },
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    { CODEC_ID_XAN_WC4, MKTAG('X', 'x', 'a', 'n') },
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    { CODEC_ID_MSRLE, MKTAG('m', 'r', 'l', 'e') },
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    { CODEC_ID_MSRLE, MKTAG(0x1, 0x0, 0x0, 0x0) },
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    { CODEC_ID_MSVIDEO1, MKTAG('M', 'S', 'V', 'C') },
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    { CODEC_ID_MSVIDEO1, MKTAG('m', 's', 'v', 'c') },
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    { CODEC_ID_MSVIDEO1, MKTAG('C', 'R', 'A', 'M') },
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    { CODEC_ID_MSVIDEO1, MKTAG('c', 'r', 'a', 'm') },
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    { CODEC_ID_MSVIDEO1, MKTAG('W', 'H', 'A', 'M') },
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    { CODEC_ID_MSVIDEO1, MKTAG('w', 'h', 'a', 'm') },
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    { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') },
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    { CODEC_ID_TRUEMOTION1, MKTAG('D', 'U', 'C', 'K') },
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    { CODEC_ID_MSZH, MKTAG('M', 'S', 'Z', 'H') },
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    { CODEC_ID_ZLIB, MKTAG('Z', 'L', 'I', 'B') },
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    { CODEC_ID_SNOW, MKTAG('S', 'N', 'O', 'W') },
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    { CODEC_ID_4XM, MKTAG('4', 'X', 'M', 'V') },
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    { CODEC_ID_FLV1, MKTAG('F', 'L', 'V', '1') },
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    { CODEC_ID_FLASHSV, MKTAG('F', 'S', 'V', '1') },
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    { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') },
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    { CODEC_ID_TSCC, MKTAG('t', 's', 'c', 'c') },
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    { CODEC_ID_ULTI, MKTAG('U', 'L', 'T', 'I') },
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    { CODEC_ID_VIXL, MKTAG('V', 'I', 'X', 'L') },
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    { CODEC_ID_QPEG, MKTAG('Q', 'P', 'E', 'G') },
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    { CODEC_ID_QPEG, MKTAG('Q', '1', '.', '0') },
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    { CODEC_ID_QPEG, MKTAG('Q', '1', '.', '1') },
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    { CODEC_ID_WMV3, MKTAG('W', 'M', 'V', '3') },
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    { CODEC_ID_LOCO, MKTAG('L', 'O', 'C', 'O') },
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    { CODEC_ID_WNV1, MKTAG('W', 'N', 'V', '1') },
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    { CODEC_ID_AASC, MKTAG('A', 'A', 'S', 'C') },
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    { CODEC_ID_INDEO2, MKTAG('R', 'T', '2', '1') },
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    { CODEC_ID_FRAPS, MKTAG('F', 'P', 'S', '1') },
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    { CODEC_ID_THEORA, MKTAG('t', 'h', 'e', 'o') },
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    { CODEC_ID_TRUEMOTION2, MKTAG('T', 'M', '2', '0') },
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    { CODEC_ID_CSCD, MKTAG('C', 'S', 'C', 'D') },
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    { CODEC_ID_ZMBV, MKTAG('Z', 'M', 'B', 'V') },
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    { CODEC_ID_KMVC, MKTAG('K', 'M', 'V', 'C') },
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    { CODEC_ID_CAVS, MKTAG('C', 'A', 'V', 'S') },
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    { CODEC_ID_JPEG2000, MKTAG('M', 'J', '2', 'C') },
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    { CODEC_ID_RAWVIDEO, 0 },
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    { CODEC_ID_NONE, 0 },
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};
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161
const CodecTag codec_wav_tags[] = {
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    { CODEC_ID_MP2, 0x50 },
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    { CODEC_ID_MP3, 0x55 },
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    { CODEC_ID_AC3, 0x2000 },
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    { CODEC_ID_DTS, 0x2001 },
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    { CODEC_ID_PCM_S16LE, 0x01 },
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    { CODEC_ID_PCM_U8, 0x01 }, /* must come after s16le in this list */
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    { CODEC_ID_PCM_S24LE, 0x01 },
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    { CODEC_ID_PCM_S32LE, 0x01 },
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    { CODEC_ID_PCM_ALAW, 0x06 },
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    { CODEC_ID_PCM_MULAW, 0x07 },
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    { CODEC_ID_ADPCM_MS, 0x02 },
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    { CODEC_ID_ADPCM_IMA_WAV, 0x11 },
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    { CODEC_ID_ADPCM_YAMAHA, 0x20 },
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    { CODEC_ID_ADPCM_G726, 0x45 },
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    { CODEC_ID_ADPCM_IMA_DK4, 0x61 },  /* rogue format number */
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    { CODEC_ID_ADPCM_IMA_DK3, 0x62 },  /* rogue format number */
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    { CODEC_ID_WMAV1, 0x160 },
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    { CODEC_ID_WMAV2, 0x161 },
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    { CODEC_ID_AAC, 0x706d },
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    { CODEC_ID_MPEG4AAC, 0xff },
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    { CODEC_ID_VORBIS, ('V'<<8)+'o' }, //HACK/FIXME, does vorbis in WAV/AVI have an (in)official id?
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    { CODEC_ID_SONIC, 0x2048 },
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    { CODEC_ID_SONIC_LS, 0x2048 },
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    { CODEC_ID_ADPCM_CT, 0x200 },
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    { CODEC_ID_ADPCM_SWF, ('S'<<8)+'F' },
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    { CODEC_ID_TRUESPEECH, 0x22 },
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    // for NuppelVideo (nuv.c)
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    { CODEC_ID_PCM_S16LE, MKTAG('R', 'A', 'W', 'A') },
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    { CODEC_ID_MP3, MKTAG('L', 'A', 'M', 'E') },
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    { 0, 0 },
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};
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unsigned int codec_get_tag(const CodecTag *tags, int id)
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{
197
    while (tags->id != CODEC_ID_NONE) {
198
        if (tags->id == id)
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            return tags->tag;
200
        tags++;
201
    }
202
    return 0;
203
}
204

    
205
unsigned int codec_get_asf_tag(const CodecTag *tags, unsigned int id)
206
{
207
    while (tags->id != CODEC_ID_NONE) {
208
        if (!tags->invalid_asf && tags->id == id)
209
            return tags->tag;
210
        tags++;
211
    }
212
    return 0;
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}
214

    
215
enum CodecID codec_get_id(const CodecTag *tags, unsigned int tag)
216
{
217
    while (tags->id != CODEC_ID_NONE) {
218
        if(   toupper((tag >> 0)&0xFF) == toupper((tags->tag >> 0)&0xFF)
219
           && toupper((tag >> 8)&0xFF) == toupper((tags->tag >> 8)&0xFF)
220
           && toupper((tag >>16)&0xFF) == toupper((tags->tag >>16)&0xFF)
221
           && toupper((tag >>24)&0xFF) == toupper((tags->tag >>24)&0xFF))
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            return tags->id;
223
        tags++;
224
    }
225
    return CODEC_ID_NONE;
226
}
227

    
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unsigned int codec_get_bmp_tag(int id)
229
{
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    return codec_get_tag(codec_bmp_tags, id);
231
}
232

    
233
unsigned int codec_get_wav_tag(int id)
234
{
235
    return codec_get_tag(codec_wav_tags, id);
236
}
237

    
238
enum CodecID codec_get_bmp_id(unsigned int tag)
239
{
240
    return codec_get_id(codec_bmp_tags, tag);
241
}
242

    
243
enum CodecID codec_get_wav_id(unsigned int tag)
244
{
245
    return codec_get_id(codec_wav_tags, tag);
246
}
247

    
248
#ifdef CONFIG_MUXERS
249
offset_t start_tag(ByteIOContext *pb, const char *tag)
250
{
251
    put_tag(pb, tag);
252
    put_le32(pb, 0);
253
    return url_ftell(pb);
254
}
255

    
256
void end_tag(ByteIOContext *pb, offset_t start)
257
{
258
    offset_t pos;
259

    
260
    pos = url_ftell(pb);
261
    url_fseek(pb, start - 4, SEEK_SET);
262
    put_le32(pb, (uint32_t)(pos - start));
263
    url_fseek(pb, pos, SEEK_SET);
264
}
265

    
266
/* WAVEFORMATEX header */
267
/* returns the size or -1 on error */
268
int put_wav_header(ByteIOContext *pb, AVCodecContext *enc)
269
{
270
    int bps, blkalign, bytespersec;
271
    int hdrsize = 18;
272

    
273
    if(!enc->codec_tag || enc->codec_tag > 0xffff)
274
       enc->codec_tag = codec_get_tag(codec_wav_tags, enc->codec_id);
275
    if(!enc->codec_tag)
276
        return -1;
277

    
278
    put_le16(pb, enc->codec_tag);
279
    put_le16(pb, enc->channels);
280
    put_le32(pb, enc->sample_rate);
281
    if (enc->codec_id == CODEC_ID_PCM_U8 ||
282
        enc->codec_id == CODEC_ID_PCM_ALAW ||
283
        enc->codec_id == CODEC_ID_PCM_MULAW) {
284
        bps = 8;
285
    } else if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3) {
286
        bps = 0;
287
    } 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) { //
288
        bps = 4;
289
    } else if (enc->codec_id == CODEC_ID_PCM_S24LE) {
290
        bps = 24;
291
    } else if (enc->codec_id == CODEC_ID_PCM_S32LE) {
292
        bps = 32;
293
    } else {
294
        bps = 16;
295
    }
296

    
297
    if (enc->codec_id == CODEC_ID_MP2 || enc->codec_id == CODEC_ID_MP3) {
298
        blkalign = enc->frame_size; //this is wrong, but seems many demuxers dont work if this is set correctly
299
        //blkalign = 144 * enc->bit_rate/enc->sample_rate;
300
    } else if (enc->codec_id == CODEC_ID_ADPCM_G726) { //
301
        blkalign = 1;
302
    } else if (enc->block_align != 0) { /* specified by the codec */
303
        blkalign = enc->block_align;
304
    } else
305
        blkalign = enc->channels*bps >> 3;
306
    if (enc->codec_id == CODEC_ID_PCM_U8 ||
307
        enc->codec_id == CODEC_ID_PCM_S24LE ||
308
        enc->codec_id == CODEC_ID_PCM_S32LE ||
309
        enc->codec_id == CODEC_ID_PCM_S16LE) {
310
        bytespersec = enc->sample_rate * blkalign;
311
    } else {
312
        bytespersec = enc->bit_rate / 8;
313
    }
314
    put_le32(pb, bytespersec); /* bytes per second */
315
    put_le16(pb, blkalign); /* block align */
316
    put_le16(pb, bps); /* bits per sample */
317
    if (enc->codec_id == CODEC_ID_MP3) {
318
        put_le16(pb, 12); /* wav_extra_size */
319
        hdrsize += 12;
320
        put_le16(pb, 1); /* wID */
321
        put_le32(pb, 2); /* fdwFlags */
322
        put_le16(pb, 1152); /* nBlockSize */
323
        put_le16(pb, 1); /* nFramesPerBlock */
324
        put_le16(pb, 1393); /* nCodecDelay */
325
    } else if (enc->codec_id == CODEC_ID_MP2) {
326
        put_le16(pb, 22); /* wav_extra_size */
327
        hdrsize += 22;
328
        put_le16(pb, 2);  /* fwHeadLayer */
329
        put_le32(pb, enc->bit_rate); /* dwHeadBitrate */
330
        put_le16(pb, enc->channels == 2 ? 1 : 8); /* fwHeadMode */
331
        put_le16(pb, 0);  /* fwHeadModeExt */
332
        put_le16(pb, 1);  /* wHeadEmphasis */
333
        put_le16(pb, 16); /* fwHeadFlags */
334
        put_le32(pb, 0);  /* dwPTSLow */
335
        put_le32(pb, 0);  /* dwPTSHigh */
336
    } else if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV) {
337
        put_le16(pb, 2); /* wav_extra_size */
338
        hdrsize += 2;
339
        put_le16(pb, ((enc->block_align - 4 * enc->channels) / (4 * enc->channels)) * 8 + 1); /* wSamplesPerBlock */
340
    } else if(enc->extradata_size){
341
        put_le16(pb, enc->extradata_size);
342
        put_buffer(pb, enc->extradata, enc->extradata_size);
343
        hdrsize += enc->extradata_size;
344
        if(hdrsize&1){
345
            hdrsize++;
346
            put_byte(pb, 0);
347
        }
348
    } else {
349
        hdrsize -= 2;
350
    }
351

    
352
    return hdrsize;
353
}
354

    
355
/* BITMAPINFOHEADER header */
356
void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const CodecTag *tags, int for_asf)
357
{
358
    put_le32(pb, 40 + enc->extradata_size); /* size */
359
    put_le32(pb, enc->width);
360
    put_le32(pb, enc->height);
361
    put_le16(pb, 1); /* planes */
362

    
363
    put_le16(pb, enc->bits_per_sample ? enc->bits_per_sample : 24); /* depth */
364
    /* compression type */
365
    put_le32(pb, for_asf ? (enc->codec_tag ? enc->codec_tag : codec_get_asf_tag(tags, enc->codec_id)) : enc->codec_tag); //
366
    put_le32(pb, enc->width * enc->height * 3);
367
    put_le32(pb, 0);
368
    put_le32(pb, 0);
369
    put_le32(pb, 0);
370
    put_le32(pb, 0);
371

    
372
    put_buffer(pb, enc->extradata, enc->extradata_size);
373

    
374
    if (enc->extradata_size & 1)
375
        put_byte(pb, 0);
376
}
377
#endif //CONFIG_MUXERS
378

    
379
#ifdef CONFIG_DEMUXERS
380
/* We could be given one of the three possible structures here:
381
 * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
382
 * is an expansion of the previous one with the fields added
383
 * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
384
 * WAVEFORMATEX adds 'WORD  cbSize' and basically makes itself
385
 * an openended structure.
386
 */
387
void get_wav_header(ByteIOContext *pb, AVCodecContext *codec, int size)
388
{
389
    int id;
390

    
391
    id = get_le16(pb);
392
    codec->codec_type = CODEC_TYPE_AUDIO;
393
    codec->codec_tag = id;
394
    codec->channels = get_le16(pb);
395
    codec->sample_rate = get_le32(pb);
396
    codec->bit_rate = get_le32(pb) * 8;
397
    codec->block_align = get_le16(pb);
398
    if (size == 14) {  /* We're dealing with plain vanilla WAVEFORMAT */
399
        codec->bits_per_sample = 8;
400
    }else
401
        codec->bits_per_sample = get_le16(pb);
402
    codec->codec_id = wav_codec_get_id(id, codec->bits_per_sample);
403

    
404
    if (size > 16) {  /* We're obviously dealing with WAVEFORMATEX */
405
        codec->extradata_size = get_le16(pb);
406
        if (codec->extradata_size > 0) {
407
            if (codec->extradata_size > size - 18)
408
                codec->extradata_size = size - 18;
409
            codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
410
            get_buffer(pb, codec->extradata, codec->extradata_size);
411
        } else
412
            codec->extradata_size = 0;
413

    
414
        /* It is possible for the chunk to contain garbage at the end */
415
        if (size - codec->extradata_size - 18 > 0)
416
            url_fskip(pb, size - codec->extradata_size - 18);
417
    }
418
}
419

    
420

    
421
int wav_codec_get_id(unsigned int tag, int bps)
422
{
423
    int id;
424
    id = codec_get_id(codec_wav_tags, tag);
425
    if (id <= 0)
426
        return id;
427
    /* handle specific u8 codec */
428
    if (id == CODEC_ID_PCM_S16LE && bps == 8)
429
        id = CODEC_ID_PCM_U8;
430
    if (id == CODEC_ID_PCM_S16LE && bps == 24)
431
        id = CODEC_ID_PCM_S24LE;
432
    if (id == CODEC_ID_PCM_S16LE && bps == 32)
433
        id = CODEC_ID_PCM_S32LE;
434
    return id;
435
}
436
#endif // CONFIG_DEMUXERS
437

    
438
void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale)
439
{
440
    int gcd;
441

    
442
    *au_ssize= stream->block_align;
443
    if(stream->frame_size && stream->sample_rate){
444
        *au_scale=stream->frame_size;
445
        *au_rate= stream->sample_rate;
446
    }else if(stream->codec_type == CODEC_TYPE_VIDEO){
447
        *au_scale= stream->time_base.num;
448
        *au_rate = stream->time_base.den;
449
    }else{
450
        *au_scale= stream->block_align ? stream->block_align*8 : 8;
451
        *au_rate = stream->bit_rate;
452
    }
453
    gcd= ff_gcd(*au_scale, *au_rate);
454
    *au_scale /= gcd;
455
    *au_rate /= gcd;
456
}