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FFmpeg/libavformat/riff.c

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  1. /*

  2.  * RIFF common functions and data

  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 "libavutil/mathematics.h"

  23. #include "libavcodec/avcodec.h"

  24. #include "avformat.h"

  25. #include "avio_internal.h"

  26. #include "riff.h"

  27. #include "libavcodec/bytestream.h"

  28. #include "libavutil/avassert.h"

  29. 

  30. /* Note: When encoding, the first matching tag is used, so order is

  31.  * important if multiple tags are possible for a given codec.

  32.  * Note also that this list is used for more than just riff, other

  33.  * files use it as well.

  34.  */

  35. const AVCodecTag ff_codec_bmp_tags[] = {

  36.     { AV_CODEC_ID_H264,         MKTAG('H', '2', '6', '4') },

  37.     { AV_CODEC_ID_H264,         MKTAG('h', '2', '6', '4') },

  38.     { AV_CODEC_ID_H264,         MKTAG('X', '2', '6', '4') },

  39.     { AV_CODEC_ID_H264,         MKTAG('x', '2', '6', '4') },

  40.     { AV_CODEC_ID_H264,         MKTAG('a', 'v', 'c', '1') },

  41.     { AV_CODEC_ID_H264,         MKTAG('D', 'A', 'V', 'C') },

  42.     { AV_CODEC_ID_H264,         MKTAG('S', 'M', 'V', '2') },

  43.     { AV_CODEC_ID_H264,         MKTAG('V', 'S', 'S', 'H') },

  44.     { AV_CODEC_ID_H264,         MKTAG('Q', '2', '6', '4') }, /* QNAP surveillance system */

  45.     { AV_CODEC_ID_H264,         MKTAG('V', '2', '6', '4') },

  46.     { AV_CODEC_ID_H263,         MKTAG('H', '2', '6', '3') },

  47.     { AV_CODEC_ID_H263,         MKTAG('X', '2', '6', '3') },

  48.     { AV_CODEC_ID_H263,         MKTAG('T', '2', '6', '3') },

  49.     { AV_CODEC_ID_H263,         MKTAG('L', '2', '6', '3') },

  50.     { AV_CODEC_ID_H263,         MKTAG('V', 'X', '1', 'K') },

  51.     { AV_CODEC_ID_H263,         MKTAG('Z', 'y', 'G', 'o') },

  52.     { AV_CODEC_ID_H263,         MKTAG('M', '2', '6', '3') },

  53.     { AV_CODEC_ID_H263,         MKTAG('l', 's', 'v', 'm') },

  54.     { AV_CODEC_ID_H263P,        MKTAG('H', '2', '6', '3') },

  55.     { AV_CODEC_ID_H263I,        MKTAG('I', '2', '6', '3') }, /* Intel H.263 */

  56.     { AV_CODEC_ID_H261,         MKTAG('H', '2', '6', '1') },

  57.     { AV_CODEC_ID_H263,         MKTAG('U', '2', '6', '3') },

  58.     { AV_CODEC_ID_MPEG4,        MKTAG('F', 'M', 'P', '4') },

  59.     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'I', 'V', 'X') },

  60.     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'X', '5', '0') },

  61.     { AV_CODEC_ID_MPEG4,        MKTAG('X', 'V', 'I', 'D') },

  62.     { AV_CODEC_ID_MPEG4,        MKTAG('M', 'P', '4', 'S') },

  63.     { AV_CODEC_ID_MPEG4,        MKTAG('M', '4', 'S', '2') },

  64.     /* some broken AVIs use this */

  65.     { AV_CODEC_ID_MPEG4,        MKTAG( 4 ,  0 ,  0 ,  0 ) },

  66.     /* some broken AVIs use this */

  67.     { AV_CODEC_ID_MPEG4,        MKTAG('Z', 'M', 'P', '4') },

  68.     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'I', 'V', '1') },

  69.     { AV_CODEC_ID_MPEG4,        MKTAG('B', 'L', 'Z', '0') },

  70.     { AV_CODEC_ID_MPEG4,        MKTAG('m', 'p', '4', 'v') },

  71.     { AV_CODEC_ID_MPEG4,        MKTAG('U', 'M', 'P', '4') },

  72.     { AV_CODEC_ID_MPEG4,        MKTAG('W', 'V', '1', 'F') },

  73.     { AV_CODEC_ID_MPEG4,        MKTAG('S', 'E', 'D', 'G') },

  74.     { AV_CODEC_ID_MPEG4,        MKTAG('R', 'M', 'P', '4') },

  75.     { AV_CODEC_ID_MPEG4,        MKTAG('3', 'I', 'V', '2') },

  76.     /* WaWv MPEG-4 Video Codec */

  77.     { AV_CODEC_ID_MPEG4,        MKTAG('W', 'A', 'W', 'V') },

  78.     { AV_CODEC_ID_MPEG4,        MKTAG('F', 'F', 'D', 'S') },

  79.     { AV_CODEC_ID_MPEG4,        MKTAG('F', 'V', 'F', 'W') },

  80.     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'C', 'O', 'D') },

  81.     { AV_CODEC_ID_MPEG4,        MKTAG('M', 'V', 'X', 'M') },

  82.     { AV_CODEC_ID_MPEG4,        MKTAG('P', 'M', '4', 'V') },

  83.     { AV_CODEC_ID_MPEG4,        MKTAG('S', 'M', 'P', '4') },

  84.     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'X', 'G', 'M') },

  85.     { AV_CODEC_ID_MPEG4,        MKTAG('V', 'I', 'D', 'M') },

  86.     { AV_CODEC_ID_MPEG4,        MKTAG('M', '4', 'T', '3') },

  87.     { AV_CODEC_ID_MPEG4,        MKTAG('G', 'E', 'O', 'X') },

  88.     /* flipped video */

  89.     { AV_CODEC_ID_MPEG4,        MKTAG('H', 'D', 'X', '4') },

  90.     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'M', 'K', '2') },

  91.     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'I', 'G', 'I') },

  92.     { AV_CODEC_ID_MPEG4,        MKTAG('I', 'N', 'M', 'C') },

  93.     /* Ephv MPEG-4 */

  94.     { AV_CODEC_ID_MPEG4,        MKTAG('E', 'P', 'H', 'V') },

  95.     { AV_CODEC_ID_MPEG4,        MKTAG('E', 'M', '4', 'A') },

  96.     /* Divio MPEG-4 */

  97.     { AV_CODEC_ID_MPEG4,        MKTAG('M', '4', 'C', 'C') },

  98.     { AV_CODEC_ID_MPEG4,        MKTAG('S', 'N', '4', '0') },

  99.     { AV_CODEC_ID_MPEG4,        MKTAG('V', 'S', 'P', 'X') },

  100.     { AV_CODEC_ID_MPEG4,        MKTAG('U', 'L', 'D', 'X') },

  101.     { AV_CODEC_ID_MPEG4,        MKTAG('G', 'E', 'O', 'V') },

  102.     /* Samsung SHR-6040 */

  103.     { AV_CODEC_ID_MPEG4,        MKTAG('S', 'I', 'P', 'P') },

  104.     { AV_CODEC_ID_MPEG4,        MKTAG('S', 'M', '4', 'V') },

  105.     { AV_CODEC_ID_MPEG4,        MKTAG('X', 'V', 'I', 'X') },

  106.     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'r', 'e', 'X') },

  107.     { AV_CODEC_ID_MPEG4,        MKTAG('Q', 'M', 'P', '4') }, /* QNAP Systems */

  108.     { AV_CODEC_ID_MPEG4,        MKTAG('P', 'L', 'V', '1') }, /* Pelco DVR MPEG-4 */

  109.     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('M', 'P', '4', '3') },

  110.     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '3') },

  111.     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('M', 'P', 'G', '3') },

  112.     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '5') },

  113.     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '6') },

  114.     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '4') },

  115.     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('D', 'V', 'X', '3') },

  116.     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('A', 'P', '4', '1') },

  117.     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('C', 'O', 'L', '1') },

  118.     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('C', 'O', 'L', '0') },

  119.     { AV_CODEC_ID_MSMPEG4V2,    MKTAG('M', 'P', '4', '2') },

  120.     { AV_CODEC_ID_MSMPEG4V2,    MKTAG('D', 'I', 'V', '2') },

  121.     { AV_CODEC_ID_MSMPEG4V1,    MKTAG('M', 'P', 'G', '4') },

  122.     { AV_CODEC_ID_MSMPEG4V1,    MKTAG('M', 'P', '4', '1') },

  123.     { AV_CODEC_ID_WMV1,         MKTAG('W', 'M', 'V', '1') },

  124.     { AV_CODEC_ID_WMV2,         MKTAG('W', 'M', 'V', '2') },

  125.     { AV_CODEC_ID_WMV2,         MKTAG('G', 'X', 'V', 'E') },

  126.     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 's', 'd') },

  127.     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'h', 'd') },

  128.     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'h', '1') },

  129.     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 's', 'l') },

  130.     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', '2', '5') },

  131.     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', '5', '0') },

  132.     /* Canopus DV */

  133.     { AV_CODEC_ID_DVVIDEO,      MKTAG('c', 'd', 'v', 'c') },

  134.     /* Canopus DV */

  135.     { AV_CODEC_ID_DVVIDEO,      MKTAG('C', 'D', 'V', 'H') },

  136.     /* Canopus DV */

  137.     { AV_CODEC_ID_DVVIDEO,      MKTAG('C', 'D', 'V', '5') },

  138.     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'c', ' ') },

  139.     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'c', 's') },

  140.     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'h', '1') },

  141.     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'i', 's') },

  142.     { AV_CODEC_ID_DVVIDEO,      MKTAG('p', 'd', 'v', 'c') },

  143.     { AV_CODEC_ID_DVVIDEO,      MKTAG('S', 'L', '2', '5') },

  144.     { AV_CODEC_ID_DVVIDEO,      MKTAG('S', 'L', 'D', 'V') },

  145.     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG('m', 'p', 'g', '1') },

  146.     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG('m', 'p', 'g', '2') },

  147.     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('m', 'p', 'g', '2') },

  148.     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('M', 'P', 'E', 'G') },

  149.     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG('P', 'I', 'M', '1') },

  150.     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('P', 'I', 'M', '2') },

  151.     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG('V', 'C', 'R', '2') },

  152.     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG( 1 ,  0 ,  0 ,  16) },

  153.     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG( 2 ,  0 ,  0 ,  16) },

  154.     { AV_CODEC_ID_MPEG4,        MKTAG( 4 ,  0 ,  0 ,  16) },

  155.     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('D', 'V', 'R', ' ') },

  156.     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('M', 'M', 'E', 'S') },

  157.     /* Lead MPEG-2 in AVI */

  158.     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('L', 'M', 'P', '2') },

  159.     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('s', 'l', 'i', 'f') },

  160.     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('E', 'M', '2', 'V') },

  161.     /* Matrox MPEG-2 intra-only */

  162.     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('M', '7', '0', '1') },

  163.     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('m', 'p', 'g', 'v') },

  164.     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG('B', 'W', '1', '0') },

  165.     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG('X', 'M', 'P', 'G') }, /* Xing MPEG intra only */

  166.     { AV_CODEC_ID_MJPEG,        MKTAG('M', 'J', 'P', 'G') },

  167.     { AV_CODEC_ID_MJPEG,        MKTAG('L', 'J', 'P', 'G') },

  168.     { AV_CODEC_ID_MJPEG,        MKTAG('d', 'm', 'b', '1') },

  169.     { AV_CODEC_ID_MJPEG,        MKTAG('m', 'j', 'p', 'a') },

  170.     { AV_CODEC_ID_LJPEG,        MKTAG('L', 'J', 'P', 'G') },

  171.     /* Pegasus lossless JPEG */

  172.     { AV_CODEC_ID_MJPEG,        MKTAG('J', 'P', 'G', 'L') },

  173.     /* JPEG-LS custom FOURCC for AVI - encoder */

  174.     { AV_CODEC_ID_JPEGLS,       MKTAG('M', 'J', 'L', 'S') },

  175.     { AV_CODEC_ID_JPEGLS,       MKTAG('M', 'J', 'P', 'G') },

  176.     /* JPEG-LS custom FOURCC for AVI - decoder */

  177.     { AV_CODEC_ID_MJPEG,        MKTAG('M', 'J', 'L', 'S') },

  178.     { AV_CODEC_ID_MJPEG,        MKTAG('j', 'p', 'e', 'g') },

  179.     { AV_CODEC_ID_MJPEG,        MKTAG('I', 'J', 'P', 'G') },

  180.     { AV_CODEC_ID_AVRN,         MKTAG('A', 'V', 'R', 'n') },

  181.     { AV_CODEC_ID_MJPEG,        MKTAG('A', 'C', 'D', 'V') },

  182.     { AV_CODEC_ID_MJPEG,        MKTAG('Q', 'I', 'V', 'G') },

  183.     /* SL M-JPEG */

  184.     { AV_CODEC_ID_MJPEG,        MKTAG('S', 'L', 'M', 'J') },

  185.     /* Creative Webcam JPEG */

  186.     { AV_CODEC_ID_MJPEG,        MKTAG('C', 'J', 'P', 'G') },

  187.     /* Intel JPEG Library Video Codec */

  188.     { AV_CODEC_ID_MJPEG,        MKTAG('I', 'J', 'L', 'V') },

  189.     /* Midvid JPEG Video Codec */

  190.     { AV_CODEC_ID_MJPEG,        MKTAG('M', 'V', 'J', 'P') },

  191.     { AV_CODEC_ID_MJPEG,        MKTAG('A', 'V', 'I', '1') },

  192.     { AV_CODEC_ID_MJPEG,        MKTAG('A', 'V', 'I', '2') },

  193.     { AV_CODEC_ID_MJPEG,        MKTAG('M', 'T', 'S', 'J') },

  194.     /* Paradigm Matrix M-JPEG Codec */

  195.     { AV_CODEC_ID_MJPEG,        MKTAG('Z', 'J', 'P', 'G') },

  196.     { AV_CODEC_ID_MJPEG,        MKTAG('M', 'M', 'J', 'P') },

  197.     { AV_CODEC_ID_HUFFYUV,      MKTAG('H', 'F', 'Y', 'U') },

  198.     { AV_CODEC_ID_FFVHUFF,      MKTAG('F', 'F', 'V', 'H') },

  199.     { AV_CODEC_ID_CYUV,         MKTAG('C', 'Y', 'U', 'V') },

  200.     { AV_CODEC_ID_RAWVIDEO,     MKTAG( 0 ,  0 ,  0 ,  0 ) },

  201.     { AV_CODEC_ID_RAWVIDEO,     MKTAG( 3 ,  0 ,  0 ,  0 ) },

  202.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('I', '4', '2', '0') },

  203.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'U', 'Y', '2') },

  204.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', '4', '2', '2') },

  205.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('V', '4', '2', '2') },

  206.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'U', 'N', 'V') },

  207.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('U', 'Y', 'N', 'V') },

  208.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('U', 'Y', 'N', 'Y') },

  209.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('u', 'y', 'v', '1') },

  210.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('2', 'V', 'u', '1') },

  211.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('2', 'v', 'u', 'y') },

  212.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('y', 'u', 'v', 's') },

  213.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('y', 'u', 'v', '2') },

  214.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('P', '4', '2', '2') },

  215.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', '1', '2') },

  216.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', '1', '6') },

  217.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', '2', '4') },

  218.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('U', 'Y', 'V', 'Y') },

  219.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('V', 'Y', 'U', 'Y') },

  220.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('I', 'Y', 'U', 'V') },

  221.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', '8', '0', '0') },

  222.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', '8', ' ', ' ') },

  223.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('H', 'D', 'Y', 'C') },

  224.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', 'U', '9') },

  225.     /* SoftLab-NSK VideoTizer */

  226.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('V', 'D', 'T', 'Z') },

  227.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', '4', '1', '1') },

  228.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('N', 'V', '1', '2') },

  229.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('N', 'V', '2', '1') },

  230.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', '4', '1', 'B') },

  231.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', '4', '2', 'B') },

  232.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'U', 'V', '9') },

  233.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', 'U', '9') },

  234.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('a', 'u', 'v', '2') },

  235.     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', 'Y', 'U') },

  236.     { AV_CODEC_ID_FRWU,         MKTAG('F', 'R', 'W', 'U') },

  237.     { AV_CODEC_ID_R10K,         MKTAG('R', '1', '0', 'k') },

  238.     { AV_CODEC_ID_R210,         MKTAG('r', '2', '1', '0') },

  239.     { AV_CODEC_ID_V210,         MKTAG('v', '2', '1', '0') },

  240.     { AV_CODEC_ID_V308,         MKTAG('v', '3', '0', '8') },

  241.     { AV_CODEC_ID_V408,         MKTAG('v', '4', '0', '8') },

  242.     { AV_CODEC_ID_AYUV,         MKTAG('A', 'Y', 'U', 'V') },

  243.     { AV_CODEC_ID_V410,         MKTAG('v', '4', '1', '0') },

  244.     { AV_CODEC_ID_YUV4,         MKTAG('y', 'u', 'v', '4') },

  245.     { AV_CODEC_ID_INDEO3,       MKTAG('I', 'V', '3', '1') },

  246.     { AV_CODEC_ID_INDEO3,       MKTAG('I', 'V', '3', '2') },

  247.     { AV_CODEC_ID_INDEO4,       MKTAG('I', 'V', '4', '1') },

  248.     { AV_CODEC_ID_INDEO5,       MKTAG('I', 'V', '5', '0') },

  249.     { AV_CODEC_ID_VP3,          MKTAG('V', 'P', '3', '1') },

  250.     { AV_CODEC_ID_VP3,          MKTAG('V', 'P', '3', '0') },

  251.     { AV_CODEC_ID_VP5,          MKTAG('V', 'P', '5', '0') },

  252.     { AV_CODEC_ID_VP6,          MKTAG('V', 'P', '6', '0') },

  253.     { AV_CODEC_ID_VP6,          MKTAG('V', 'P', '6', '1') },

  254.     { AV_CODEC_ID_VP6,          MKTAG('V', 'P', '6', '2') },

  255.     { AV_CODEC_ID_VP6F,         MKTAG('V', 'P', '6', 'F') },

  256.     { AV_CODEC_ID_VP6F,         MKTAG('F', 'L', 'V', '4') },

  257.     { AV_CODEC_ID_VP8,          MKTAG('V', 'P', '8', '0') },

  258.     { AV_CODEC_ID_ASV1,         MKTAG('A', 'S', 'V', '1') },

  259.     { AV_CODEC_ID_ASV2,         MKTAG('A', 'S', 'V', '2') },

  260.     { AV_CODEC_ID_VCR1,         MKTAG('V', 'C', 'R', '1') },

  261.     { AV_CODEC_ID_FFV1,         MKTAG('F', 'F', 'V', '1') },

  262.     { AV_CODEC_ID_XAN_WC4,      MKTAG('X', 'x', 'a', 'n') },

  263.     { AV_CODEC_ID_MIMIC,        MKTAG('L', 'M', '2', '0') },

  264.     { AV_CODEC_ID_MSRLE,        MKTAG('m', 'r', 'l', 'e') },

  265.     { AV_CODEC_ID_MSRLE,        MKTAG( 1 ,  0 ,  0 ,  0 ) },

  266.     { AV_CODEC_ID_MSRLE,        MKTAG( 2 ,  0 ,  0 ,  0 ) },

  267.     { AV_CODEC_ID_MSVIDEO1,     MKTAG('M', 'S', 'V', 'C') },

  268.     { AV_CODEC_ID_MSVIDEO1,     MKTAG('m', 's', 'v', 'c') },

  269.     { AV_CODEC_ID_MSVIDEO1,     MKTAG('C', 'R', 'A', 'M') },

  270.     { AV_CODEC_ID_MSVIDEO1,     MKTAG('c', 'r', 'a', 'm') },

  271.     { AV_CODEC_ID_MSVIDEO1,     MKTAG('W', 'H', 'A', 'M') },

  272.     { AV_CODEC_ID_MSVIDEO1,     MKTAG('w', 'h', 'a', 'm') },

  273.     { AV_CODEC_ID_CINEPAK,      MKTAG('c', 'v', 'i', 'd') },

  274.     { AV_CODEC_ID_TRUEMOTION1,  MKTAG('D', 'U', 'C', 'K') },

  275.     { AV_CODEC_ID_TRUEMOTION1,  MKTAG('P', 'V', 'E', 'Z') },

  276.     { AV_CODEC_ID_MSZH,         MKTAG('M', 'S', 'Z', 'H') },

  277.     { AV_CODEC_ID_ZLIB,         MKTAG('Z', 'L', 'I', 'B') },

  278.     { AV_CODEC_ID_SNOW,         MKTAG('S', 'N', 'O', 'W') },

  279.     { AV_CODEC_ID_4XM,          MKTAG('4', 'X', 'M', 'V') },

  280.     { AV_CODEC_ID_FLV1,         MKTAG('F', 'L', 'V', '1') },

  281.     { AV_CODEC_ID_FLV1,         MKTAG('S', '2', '6', '3') },

  282.     { AV_CODEC_ID_FLASHSV,      MKTAG('F', 'S', 'V', '1') },

  283.     { AV_CODEC_ID_SVQ1,         MKTAG('s', 'v', 'q', '1') },

  284.     { AV_CODEC_ID_TSCC,         MKTAG('t', 's', 'c', 'c') },

  285.     { AV_CODEC_ID_ULTI,         MKTAG('U', 'L', 'T', 'I') },

  286.     { AV_CODEC_ID_VIXL,         MKTAG('V', 'I', 'X', 'L') },

  287.     { AV_CODEC_ID_QPEG,         MKTAG('Q', 'P', 'E', 'G') },

  288.     { AV_CODEC_ID_QPEG,         MKTAG('Q', '1', '.', '0') },

  289.     { AV_CODEC_ID_QPEG,         MKTAG('Q', '1', '.', '1') },

  290.     { AV_CODEC_ID_WMV3,         MKTAG('W', 'M', 'V', '3') },

  291.     { AV_CODEC_ID_WMV3IMAGE,    MKTAG('W', 'M', 'V', 'P') },

  292.     { AV_CODEC_ID_VC1,          MKTAG('W', 'V', 'C', '1') },

  293.     { AV_CODEC_ID_VC1,          MKTAG('W', 'M', 'V', 'A') },

  294.     { AV_CODEC_ID_VC1IMAGE,     MKTAG('W', 'V', 'P', '2') },

  295.     { AV_CODEC_ID_LOCO,         MKTAG('L', 'O', 'C', 'O') },

  296.     { AV_CODEC_ID_WNV1,         MKTAG('W', 'N', 'V', '1') },

  297.     { AV_CODEC_ID_WNV1,         MKTAG('Y', 'U', 'V', '8') },

  298.     { AV_CODEC_ID_AASC,         MKTAG('A', 'A', 'S', '4') },

  299.     { AV_CODEC_ID_AASC,         MKTAG('A', 'A', 'S', 'C') },

  300.     { AV_CODEC_ID_INDEO2,       MKTAG('R', 'T', '2', '1') },

  301.     { AV_CODEC_ID_FRAPS,        MKTAG('F', 'P', 'S', '1') },

  302.     { AV_CODEC_ID_THEORA,       MKTAG('t', 'h', 'e', 'o') },

  303.     { AV_CODEC_ID_TRUEMOTION2,  MKTAG('T', 'M', '2', '0') },

  304.     { AV_CODEC_ID_CSCD,         MKTAG('C', 'S', 'C', 'D') },

  305.     { AV_CODEC_ID_ZMBV,         MKTAG('Z', 'M', 'B', 'V') },

  306.     { AV_CODEC_ID_KMVC,         MKTAG('K', 'M', 'V', 'C') },

  307.     { AV_CODEC_ID_CAVS,         MKTAG('C', 'A', 'V', 'S') },

  308.     { AV_CODEC_ID_JPEG2000,     MKTAG('m', 'j', 'p', '2') },

  309.     { AV_CODEC_ID_JPEG2000,     MKTAG('M', 'J', '2', 'C') },

  310.     { AV_CODEC_ID_JPEG2000,     MKTAG('L', 'J', '2', 'C') },

  311.     { AV_CODEC_ID_JPEG2000,     MKTAG('L', 'J', '2', 'K') },

  312.     { AV_CODEC_ID_JPEG2000,     MKTAG('I', 'P', 'J', '2') },

  313.     { AV_CODEC_ID_VMNC,         MKTAG('V', 'M', 'n', 'c') },

  314.     { AV_CODEC_ID_TARGA,        MKTAG('t', 'g', 'a', ' ') },

  315.     { AV_CODEC_ID_PNG,          MKTAG('M', 'P', 'N', 'G') },

  316.     { AV_CODEC_ID_PNG,          MKTAG('P', 'N', 'G', '1') },

  317.     { AV_CODEC_ID_CLJR,         MKTAG('C', 'L', 'J', 'R') },

  318.     { AV_CODEC_ID_DIRAC,        MKTAG('d', 'r', 'a', 'c') },

  319.     { AV_CODEC_ID_RPZA,         MKTAG('a', 'z', 'p', 'r') },

  320.     { AV_CODEC_ID_RPZA,         MKTAG('R', 'P', 'Z', 'A') },

  321.     { AV_CODEC_ID_RPZA,         MKTAG('r', 'p', 'z', 'a') },

  322.     { AV_CODEC_ID_SP5X,         MKTAG('S', 'P', '5', '4') },

  323.     { AV_CODEC_ID_AURA,         MKTAG('A', 'U', 'R', 'A') },

  324.     { AV_CODEC_ID_AURA2,        MKTAG('A', 'U', 'R', '2') },

  325.     { AV_CODEC_ID_DPX,          MKTAG('d', 'p', 'x', ' ') },

  326.     { AV_CODEC_ID_KGV1,         MKTAG('K', 'G', 'V', '1') },

  327.     { AV_CODEC_ID_LAGARITH,     MKTAG('L', 'A', 'G', 'S') },

  328.     { AV_CODEC_ID_AMV,          MKTAG('A', 'M', 'V', 'F') },

  329.     { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'R', 'A') },

  330.     { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'R', 'G') },

  331.     { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'Y', '0') },

  332.     { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'Y', '2') },

  333.     /* Ut Video version 13.0.1 BT.709 codecs */

  334.     { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'H', '0') },

  335.     { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'H', '2') },

  336.     { AV_CODEC_ID_VBLE,         MKTAG('V', 'B', 'L', 'E') },

  337.     { AV_CODEC_ID_ESCAPE130,    MKTAG('E', '1', '3', '0') },

  338.     { AV_CODEC_ID_DXTORY,       MKTAG('x', 't', 'o', 'r') },

  339.     { AV_CODEC_ID_ZEROCODEC,    MKTAG('Z', 'E', 'C', 'O') },

  340.     { AV_CODEC_ID_Y41P,         MKTAG('Y', '4', '1', 'P') },

  341.     { AV_CODEC_ID_FLIC,         MKTAG('A', 'F', 'L', 'C') },

  342.     { AV_CODEC_ID_MSS1,         MKTAG('M', 'S', 'S', '1') },

  343.     { AV_CODEC_ID_MSA1,         MKTAG('M', 'S', 'A', '1') },

  344.     { AV_CODEC_ID_TSCC2,        MKTAG('T', 'S', 'C', '2') },

  345.     { AV_CODEC_ID_MTS2,         MKTAG('M', 'T', 'S', '2') },

  346.     { AV_CODEC_ID_CLLC,         MKTAG('C', 'L', 'L', 'C') },

  347.     { AV_CODEC_ID_MSS2,         MKTAG('M', 'S', 'S', '2') },

  348.     { AV_CODEC_ID_SVQ3,         MKTAG('S', 'V', 'Q', '3') },

  349.     { AV_CODEC_ID_012V,         MKTAG('0', '1', '2', 'v') },

  350.     { AV_CODEC_ID_012V,         MKTAG('a', '1', '2', 'v') },

  351.     { AV_CODEC_ID_G2M,          MKTAG('G', '2', 'M', '2') },

  352.     { AV_CODEC_ID_G2M,          MKTAG('G', '2', 'M', '3') },

  353.     { AV_CODEC_ID_G2M,          MKTAG('G', '2', 'M', '4') },

  354.     { AV_CODEC_ID_NONE,         0 }

  355. };

  356. 

  357. const AVCodecTag ff_codec_wav_tags[] = {

  358.     { AV_CODEC_ID_PCM_S16LE,       0x0001 },

  359.     /* must come after s16le in this list */

  360.     { AV_CODEC_ID_PCM_U8,          0x0001 },

  361.     { AV_CODEC_ID_PCM_S24LE,       0x0001 },

  362.     { AV_CODEC_ID_PCM_S32LE,       0x0001 },

  363.     { AV_CODEC_ID_ADPCM_MS,        0x0002 },

  364.     { AV_CODEC_ID_PCM_F32LE,       0x0003 },

  365.     /* must come after f32le in this list */

  366.     { AV_CODEC_ID_PCM_F64LE,       0x0003 },

  367.     { AV_CODEC_ID_PCM_ALAW,        0x0006 },

  368.     { AV_CODEC_ID_PCM_MULAW,       0x0007 },

  369.     { AV_CODEC_ID_WMAVOICE,        0x000A },

  370.     { AV_CODEC_ID_ADPCM_IMA_OKI,   0x0010 },

  371.     { AV_CODEC_ID_ADPCM_IMA_WAV,   0x0011 },

  372.     /* must come after adpcm_ima_wav in this list */

  373.     { AV_CODEC_ID_PCM_ZORK,        0x0011 },

  374.     { AV_CODEC_ID_ADPCM_IMA_OKI,   0x0017 },

  375.     { AV_CODEC_ID_ADPCM_YAMAHA,    0x0020 },

  376.     { AV_CODEC_ID_TRUESPEECH,      0x0022 },

  377.     { AV_CODEC_ID_GSM_MS,          0x0031 },

  378.     { AV_CODEC_ID_AMR_NB,          0x0038 },  /* rogue format number */

  379.     { AV_CODEC_ID_G723_1,          0x0042 },

  380.     { AV_CODEC_ID_ADPCM_G726,      0x0045 },

  381.     { AV_CODEC_ID_MP2,             0x0050 },

  382.     { AV_CODEC_ID_MP3,             0x0055 },

  383.     { AV_CODEC_ID_AMR_NB,          0x0057 },

  384.     { AV_CODEC_ID_AMR_WB,          0x0058 },

  385.     /* rogue format number */

  386.     { AV_CODEC_ID_ADPCM_IMA_DK4,   0x0061 },

  387.     /* rogue format number */

  388.     { AV_CODEC_ID_ADPCM_IMA_DK3,   0x0062 },

  389.     { AV_CODEC_ID_ADPCM_IMA_WAV,   0x0069 },

  390.     { AV_CODEC_ID_VOXWARE,         0x0075 },

  391.     { AV_CODEC_ID_AAC,             0x00ff },

  392.     { AV_CODEC_ID_SIPR,            0x0130 },

  393.     { AV_CODEC_ID_WMAV1,           0x0160 },

  394.     { AV_CODEC_ID_WMAV2,           0x0161 },

  395.     { AV_CODEC_ID_WMAPRO,          0x0162 },

  396.     { AV_CODEC_ID_WMALOSSLESS,     0x0163 },

  397.     { AV_CODEC_ID_ADPCM_CT,        0x0200 },

  398.     { AV_CODEC_ID_ATRAC3,          0x0270 },

  399.     { AV_CODEC_ID_ADPCM_G722,      0x028F },

  400.     { AV_CODEC_ID_IMC,             0x0401 },

  401.     { AV_CODEC_ID_IAC,             0x0402 },

  402.     { AV_CODEC_ID_GSM_MS,          0x1500 },

  403.     { AV_CODEC_ID_TRUESPEECH,      0x1501 },

  404.     /* ADTS AAC */

  405.     { AV_CODEC_ID_AAC,             0x1600 },

  406.     { AV_CODEC_ID_AAC_LATM,        0x1602 },

  407.     { AV_CODEC_ID_AC3,             0x2000 },

  408.     { AV_CODEC_ID_DTS,             0x2001 },

  409.     { AV_CODEC_ID_SONIC,           0x2048 },

  410.     { AV_CODEC_ID_SONIC_LS,        0x2048 },

  411.     { AV_CODEC_ID_PCM_MULAW,       0x6c75 },

  412.     { AV_CODEC_ID_AAC,             0x706d },

  413.     { AV_CODEC_ID_AAC,             0x4143 },

  414.     { AV_CODEC_ID_G723_1,          0xA100 },

  415.     { AV_CODEC_ID_AAC,             0xA106 },

  416.     { AV_CODEC_ID_SPEEX,           0xA109 },

  417.     { AV_CODEC_ID_FLAC,            0xF1AC },

  418.     { AV_CODEC_ID_ADPCM_SWF,       ('S' << 8) + 'F' },

  419.     /* HACK/FIXME: Does Vorbis in WAV/AVI have an (in)official ID? */

  420.     { AV_CODEC_ID_VORBIS,          ('V' << 8) + 'o' },

  421.     { AV_CODEC_ID_NONE,      0 },

  422. };

  423. 

  424. const AVCodecGuid ff_codec_wav_guids[] = {

  425.     { AV_CODEC_ID_AC3,      { 0x2C, 0x80, 0x6D, 0xE0, 0x46, 0xDB, 0xCF, 0x11, 0xB4, 0xD1, 0x00, 0x80, 0x5F, 0x6C, 0xBB, 0xEA } },

  426.     { AV_CODEC_ID_ATRAC3P,  { 0xBF, 0xAA, 0x23, 0xE9, 0x58, 0xCB, 0x71, 0x44, 0xA1, 0x19, 0xFF, 0xFA, 0x01, 0xE4, 0xCE, 0x62 } },

  427.     { AV_CODEC_ID_EAC3,     { 0xAF, 0x87, 0xFB, 0xA7, 0x02, 0x2D, 0xFB, 0x42, 0xA4, 0xD4, 0x05, 0xCD, 0x93, 0x84, 0x3B, 0xDD } },

  428.     { AV_CODEC_ID_MP2,      { 0x2B, 0x80, 0x6D, 0xE0, 0x46, 0xDB, 0xCF, 0x11, 0xB4, 0xD1, 0x00, 0x80, 0x5F, 0x6C, 0xBB, 0xEA } },

  429.     { AV_CODEC_ID_NONE }

  430. };

  431. 

  432. const AVMetadataConv ff_riff_info_conv[] = {

  433.     { "IART", "artist"     },

  434.     { "ICMT", "comment"    },

  435.     { "ICOP", "copyright"  },

  436.     { "ICRD", "date"       },

  437.     { "IGNR", "genre"      },

  438.     { "ILNG", "language"   },

  439.     { "INAM", "title"      },

  440.     { "IPRD", "album"      },

  441.     { "IPRT", "track"      },

  442.     { "ITRK", "track"      },

  443.     { "ISFT", "encoder"    },

  444.     { "ISMP", "timecode"   },

  445.     { "ITCH", "encoded_by" },

  446.     { 0 },

  447. };

  448. 

  449. void ff_get_guid(AVIOContext *s, ff_asf_guid *g)

  450. {

  451.     av_assert0(sizeof(*g) == 16); //compiler will optimize this out

  452.     if (avio_read(s, *g, sizeof(*g)) < (int)sizeof(*g))

  453.         memset(*g, 0, sizeof(*g));

  454. }

  455. 

  456. enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)

  457. {

  458.     int i;

  459.     for (i = 0; guids[i].id != AV_CODEC_ID_NONE; i++)

  460.         if (!ff_guidcmp(guids[i].guid, guid))

  461.             return guids[i].id;

  462.     return AV_CODEC_ID_NONE;

  463. }

  464. 

  465. const struct AVCodecTag *avformat_get_riff_video_tags(void)

  466. {

  467.     return ff_codec_bmp_tags;

  468. }

  469. 

  470. const struct AVCodecTag *avformat_get_riff_audio_tags(void)

  471. {

  472.     return ff_codec_wav_tags;

  473. }

  474. 

  475. #if CONFIG_MUXERS

  476. int64_t ff_start_tag(AVIOContext *pb, const char *tag)

  477. {

  478.     ffio_wfourcc(pb, tag);

  479.     avio_wl32(pb, 0);

  480.     return avio_tell(pb);

  481. }

  482. 

  483. void ff_end_tag(AVIOContext *pb, int64_t start)

  484. {

  485.     int64_t pos;

  486. 

  487.     av_assert0((start&1) == 0);

  488. 

  489.     pos = avio_tell(pb);

  490.     if (pos & 1)

  491.         avio_w8(pb, 0);

  492.     avio_seek(pb, start - 4, SEEK_SET);

  493.     avio_wl32(pb, (uint32_t)(pos - start));

  494.     avio_seek(pb, FFALIGN(pos, 2), SEEK_SET);

  495. }

  496. 

  497. /* WAVEFORMATEX header */

  498. /* returns the size or -1 on error */

  499. int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc)

  500. {

  501.     int bps, blkalign, bytespersec, frame_size;

  502.     int hdrsize = 18;

  503.     int waveformatextensible;

  504.     uint8_t temp[256];

  505.     uint8_t *riff_extradata       = temp;

  506.     uint8_t *riff_extradata_start = temp;

  507. 

  508.     if (!enc->codec_tag || enc->codec_tag > 0xffff)

  509.         return -1;

  510. 

  511.     /* We use the known constant frame size for the codec if known, otherwise

  512.      * fall back on using AVCodecContext.frame_size, which is not as reliable

  513.      * for indicating packet duration. */

  514.     frame_size = av_get_audio_frame_duration(enc, 0);

  515.     if (!frame_size)

  516.         frame_size = enc->frame_size;

  517. 

  518.     waveformatextensible = (enc->channels > 2 && enc->channel_layout) ||

  519.                            enc->sample_rate > 48000 ||

  520.                            av_get_bits_per_sample(enc->codec_id) > 16;

  521. 

  522.     if (waveformatextensible)

  523.         avio_wl16(pb, 0xfffe);

  524.     else

  525.         avio_wl16(pb, enc->codec_tag);

  526. 

  527.     avio_wl16(pb, enc->channels);

  528.     avio_wl32(pb, enc->sample_rate);

  529.     if (enc->codec_id == AV_CODEC_ID_ATRAC3 ||

  530.         enc->codec_id == AV_CODEC_ID_G723_1 ||

  531.         enc->codec_id == AV_CODEC_ID_MP2    ||

  532.         enc->codec_id == AV_CODEC_ID_MP3    ||

  533.         enc->codec_id == AV_CODEC_ID_GSM_MS) {

  534.         bps = 0;

  535.     } else {

  536.         if (!(bps = av_get_bits_per_sample(enc->codec_id))) {

  537.             if (enc->bits_per_coded_sample)

  538.                 bps = enc->bits_per_coded_sample;

  539.             else

  540.                 bps = 16;  // default to 16

  541.         }

  542.     }

  543.     if (bps != enc->bits_per_coded_sample && enc->bits_per_coded_sample) {

  544.         av_log(enc, AV_LOG_WARNING,

  545.                "requested bits_per_coded_sample (%d) "

  546.                "and actually stored (%d) differ\n",

  547.                enc->bits_per_coded_sample, bps);

  548.     }

  549. 

  550.     if (enc->codec_id == AV_CODEC_ID_MP2 ||

  551.         enc->codec_id == AV_CODEC_ID_MP3) {

  552.         /* This is wrong, but it seems many demuxers do not work if this

  553.          * is set correctly. */

  554.         blkalign = frame_size;

  555.         // blkalign = 144 * enc->bit_rate/enc->sample_rate;

  556.     } else if (enc->codec_id == AV_CODEC_ID_AC3) {

  557.         blkalign = 3840;                /* maximum bytes per frame */

  558.     } else if (enc->codec_id == AV_CODEC_ID_AAC) {

  559.         blkalign = 768 * enc->channels; /* maximum bytes per frame */

  560.     } else if (enc->codec_id == AV_CODEC_ID_G723_1) {

  561.         blkalign = 24;

  562.     } else if (enc->block_align != 0) { /* specified by the codec */

  563.         blkalign = enc->block_align;

  564.     } else

  565.         blkalign = bps * enc->channels / av_gcd(8, bps);

  566.     if (enc->codec_id == AV_CODEC_ID_PCM_U8 ||

  567.         enc->codec_id == AV_CODEC_ID_PCM_S24LE ||

  568.         enc->codec_id == AV_CODEC_ID_PCM_S32LE ||

  569.         enc->codec_id == AV_CODEC_ID_PCM_F32LE ||

  570.         enc->codec_id == AV_CODEC_ID_PCM_F64LE ||

  571.         enc->codec_id == AV_CODEC_ID_PCM_S16LE) {

  572.         bytespersec = enc->sample_rate * blkalign;

  573.     } else if (enc->codec_id == AV_CODEC_ID_G723_1) {

  574.         bytespersec = 800;

  575.     } else {

  576.         bytespersec = enc->bit_rate / 8;

  577.     }

  578.     avio_wl32(pb, bytespersec); /* bytes per second */

  579.     avio_wl16(pb, blkalign);    /* block align */

  580.     avio_wl16(pb, bps);         /* bits per sample */

  581.     if (enc->codec_id == AV_CODEC_ID_MP3) {

  582.         hdrsize += 12;

  583.         bytestream_put_le16(&riff_extradata, 1);    /* wID */

  584.         bytestream_put_le32(&riff_extradata, 2);    /* fdwFlags */

  585.         bytestream_put_le16(&riff_extradata, 1152); /* nBlockSize */

  586.         bytestream_put_le16(&riff_extradata, 1);    /* nFramesPerBlock */

  587.         bytestream_put_le16(&riff_extradata, 1393); /* nCodecDelay */

  588.     } else if (enc->codec_id == AV_CODEC_ID_MP2) {

  589.         hdrsize += 22;

  590.         /* fwHeadLayer */

  591.         bytestream_put_le16(&riff_extradata, 2);

  592.         /* dwHeadBitrate */

  593.         bytestream_put_le32(&riff_extradata, enc->bit_rate);

  594.         /* fwHeadMode */

  595.         bytestream_put_le16(&riff_extradata, enc->channels == 2 ? 1 : 8);

  596.         /* fwHeadModeExt */

  597.         bytestream_put_le16(&riff_extradata, 0);

  598.         /* wHeadEmphasis */

  599.         bytestream_put_le16(&riff_extradata, 1);

  600.         /* fwHeadFlags */

  601.         bytestream_put_le16(&riff_extradata, 16);

  602.         /* dwPTSLow */

  603.         bytestream_put_le32(&riff_extradata, 0);

  604.         /* dwPTSHigh */

  605.         bytestream_put_le32(&riff_extradata, 0);

  606.     } else if (enc->codec_id == AV_CODEC_ID_G723_1) {

  607.         hdrsize += 20;

  608.         bytestream_put_le32(&riff_extradata, 0x9ace0002); /* extradata needed for msacm g723.1 codec */

  609.         bytestream_put_le32(&riff_extradata, 0xaea2f732);

  610.         bytestream_put_le16(&riff_extradata, 0xacde);

  611.     } else if (enc->codec_id == AV_CODEC_ID_GSM_MS ||

  612.                enc->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {

  613.         hdrsize += 2;

  614.         /* wSamplesPerBlock */

  615.         bytestream_put_le16(&riff_extradata, frame_size);

  616.     } else if (enc->extradata_size) {

  617.         riff_extradata_start = enc->extradata;

  618.         riff_extradata       = enc->extradata + enc->extradata_size;

  619.         hdrsize             += enc->extradata_size;

  620.     }

  621.     /* write WAVEFORMATEXTENSIBLE extensions */

  622.     if (waveformatextensible) {

  623.         hdrsize += 22;

  624.         /* 22 is WAVEFORMATEXTENSIBLE size */

  625.         avio_wl16(pb, riff_extradata - riff_extradata_start + 22);

  626.         /* ValidBitsPerSample || SamplesPerBlock || Reserved */

  627.         avio_wl16(pb, bps);

  628.         /* dwChannelMask */

  629.         avio_wl32(pb, enc->channel_layout);

  630.         /* GUID + next 3 */

  631.         avio_wl32(pb, enc->codec_tag);

  632.         avio_wl32(pb, 0x00100000);

  633.         avio_wl32(pb, 0xAA000080);

  634.         avio_wl32(pb, 0x719B3800);

  635.     } else {

  636.         avio_wl16(pb, riff_extradata - riff_extradata_start); /* cbSize */

  637.     }

  638.     avio_write(pb, riff_extradata_start, riff_extradata - riff_extradata_start);

  639.     if (hdrsize & 1) {

  640.         hdrsize++;

  641.         avio_w8(pb, 0);

  642.     }

  643. 

  644.     return hdrsize;

  645. }

  646. 

  647. /* BITMAPINFOHEADER header */

  648. void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc,

  649.                        const AVCodecTag *tags, int for_asf)

  650. {

  651.     /* size */

  652.     avio_wl32(pb, 40 + enc->extradata_size);

  653.     avio_wl32(pb, enc->width);

  654.     //We always store RGB TopDown

  655.     avio_wl32(pb, enc->codec_tag ? enc->height : -enc->height);

  656.     /* planes */

  657.     avio_wl16(pb, 1);

  658.     /* depth */

  659.     avio_wl16(pb, enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24);

  660.     /* compression type */

  661.     avio_wl32(pb, enc->codec_tag);

  662.     avio_wl32(pb, (enc->width * enc->height * (enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24)+7) / 8);

  663.     avio_wl32(pb, 0);

  664.     avio_wl32(pb, 0);

  665.     avio_wl32(pb, 0);

  666.     avio_wl32(pb, 0);

  667. 

  668.     avio_write(pb, enc->extradata, enc->extradata_size);

  669. 

  670.     if (!for_asf && enc->extradata_size & 1)

  671.         avio_w8(pb, 0);

  672. }

  673. 

  674. void ff_parse_specific_params(AVCodecContext *stream, int *au_rate,

  675.                               int *au_ssize, int *au_scale)

  676. {

  677.     int gcd;

  678.     int audio_frame_size;

  679. 

  680.     /* We use the known constant frame size for the codec if known, otherwise

  681.      * fall back on using AVCodecContext.frame_size, which is not as reliable

  682.      * for indicating packet duration. */

  683.     audio_frame_size = av_get_audio_frame_duration(stream, 0);

  684.     if (!audio_frame_size)

  685.         audio_frame_size = stream->frame_size;

  686. 

  687.     *au_ssize = stream->block_align;

  688.     if (audio_frame_size && stream->sample_rate) {

  689.         *au_scale = audio_frame_size;

  690.         *au_rate  = stream->sample_rate;

  691.     } else if (stream->codec_type == AVMEDIA_TYPE_VIDEO ||

  692.                stream->codec_type == AVMEDIA_TYPE_DATA ||

  693.                stream->codec_type == AVMEDIA_TYPE_SUBTITLE) {

  694.         *au_scale = stream->time_base.num;

  695.         *au_rate  = stream->time_base.den;

  696.     } else {

  697.         *au_scale = stream->block_align ? stream->block_align * 8 : 8;

  698.         *au_rate  = stream->bit_rate ? stream->bit_rate :

  699.                     8 * stream->sample_rate;

  700.     }

  701.     gcd        = av_gcd(*au_scale, *au_rate);

  702.     *au_scale /= gcd;

  703.     *au_rate  /= gcd;

  704. }

  705. 

  706. void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str)

  707. {

  708.     int len = strlen(str);

  709.     if (len > 0) {

  710.         len++;

  711.         ffio_wfourcc(pb, tag);

  712.         avio_wl32(pb, len);

  713.         avio_put_str(pb, str);

  714.         if (len & 1)

  715.             avio_w8(pb, 0);

  716.     }

  717. }

  718. 

  719. static const char riff_tags[][5] = {

  720.     "IARL", "IART", "ICMS", "ICMT", "ICOP", "ICRD", "ICRP", "IDIM", "IDPI",

  721.     "IENG", "IGNR", "IKEY", "ILGT", "ILNG", "IMED", "INAM", "IPLT", "IPRD",

  722.     "IPRT", "ITRK", "ISBJ", "ISFT", "ISHP", "ISMP", "ISRC", "ISRF", "ITCH",

  723.     { 0 }

  724. };

  725. 

  726. static int riff_has_valid_tags(AVFormatContext *s)

  727. {

  728.     int i;

  729. 

  730.     for (i = 0; *riff_tags[i]; i++)

  731.         if (av_dict_get(s->metadata, riff_tags[i], NULL, AV_DICT_MATCH_CASE))

  732.             return 1;

  733. 

  734.     return 0;

  735. }

  736. 

  737. void ff_riff_write_info(AVFormatContext *s)

  738. {

  739.     AVIOContext *pb = s->pb;

  740.     int i;

  741.     int64_t list_pos;

  742.     AVDictionaryEntry *t = NULL;

  743. 

  744.     ff_metadata_conv(&s->metadata, ff_riff_info_conv, NULL);

  745. 

  746.     /* writing empty LIST is not nice and may cause problems */

  747.     if (!riff_has_valid_tags(s))

  748.         return;

  749. 

  750.     list_pos = ff_start_tag(pb, "LIST");

  751.     ffio_wfourcc(pb, "INFO");

  752.     for (i = 0; *riff_tags[i]; i++)

  753.         if ((t = av_dict_get(s->metadata, riff_tags[i],

  754.                              NULL, AV_DICT_MATCH_CASE)))

  755.             ff_riff_write_info_tag(s->pb, t->key, t->value);

  756.     ff_end_tag(pb, list_pos);

  757. }

  758. #endif /* CONFIG_MUXERS */

  759. 

  760. #if CONFIG_DEMUXERS

  761. /* We could be given one of the three possible structures here:

  762.  * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure

  763.  * is an expansion of the previous one with the fields added

  764.  * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and

  765.  * WAVEFORMATEX adds 'WORD  cbSize' and basically makes itself

  766.  * an openended structure.

  767.  */

  768. 

  769. static void parse_waveformatex(AVIOContext *pb, AVCodecContext *c)

  770. {

  771.     ff_asf_guid subformat;

  772.     int bps = avio_rl16(pb);

  773.     if (bps)

  774.         c->bits_per_coded_sample = bps;

  775. 

  776.     c->channel_layout        = avio_rl32(pb); /* dwChannelMask */

  777. 

  778.     ff_get_guid(pb, &subformat);

  779.     if (!memcmp(subformat + 4,

  780.                 (const uint8_t[]){ FF_MEDIASUBTYPE_BASE_GUID }, 12)) {

  781.         c->codec_tag = AV_RL32(subformat);

  782.         c->codec_id  = ff_wav_codec_get_id(c->codec_tag,

  783.                                            c->bits_per_coded_sample);

  784.     } else {

  785.         c->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subformat);

  786.         if (!c->codec_id)

  787.             av_log(c, AV_LOG_WARNING,

  788.                    "unknown subformat:"FF_PRI_GUID"\n",

  789.                    FF_ARG_GUID(subformat));

  790.     }

  791. }

  792. 

  793. int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)

  794. {

  795.     int id;

  796. 

  797.     id                 = avio_rl16(pb);

  798.     codec->codec_type  = AVMEDIA_TYPE_AUDIO;

  799.     codec->channels    = avio_rl16(pb);

  800.     codec->sample_rate = avio_rl32(pb);

  801.     codec->bit_rate    = avio_rl32(pb) * 8;

  802.     codec->block_align = avio_rl16(pb);

  803.     if (size == 14) {  /* We're dealing with plain vanilla WAVEFORMAT */

  804.         codec->bits_per_coded_sample = 8;

  805.     } else

  806.         codec->bits_per_coded_sample = avio_rl16(pb);

  807.     if (id == 0xFFFE) {

  808.         codec->codec_tag = 0;

  809.     } else {

  810.         codec->codec_tag = id;

  811.         codec->codec_id  = ff_wav_codec_get_id(id,

  812.                                                codec->bits_per_coded_sample);

  813.     }

  814.     if (size >= 18) {  /* We're obviously dealing with WAVEFORMATEX */

  815.         int cbSize = avio_rl16(pb); /* cbSize */

  816.         size  -= 18;

  817.         cbSize = FFMIN(size, cbSize);

  818.         if (cbSize >= 22 && id == 0xfffe) { /* WAVEFORMATEXTENSIBLE */

  819.             parse_waveformatex(pb, codec);

  820.             cbSize -= 22;

  821.             size   -= 22;

  822.         }

  823.         codec->extradata_size = cbSize;

  824.         if (cbSize > 0) {

  825.             av_free(codec->extradata);

  826.             codec->extradata = av_mallocz(codec->extradata_size +

  827.                                           FF_INPUT_BUFFER_PADDING_SIZE);

  828.             if (!codec->extradata)

  829.                 return AVERROR(ENOMEM);

  830.             avio_read(pb, codec->extradata, codec->extradata_size);

  831.             size -= cbSize;

  832.         }

  833. 

  834.         /* It is possible for the chunk to contain garbage at the end */

  835.         if (size > 0)

  836.             avio_skip(pb, size);

  837.     }

  838.     if (codec->codec_id == AV_CODEC_ID_AAC_LATM) {

  839.         /* Channels and sample_rate values are those prior to applying SBR

  840.          * and/or PS. */

  841.         codec->channels    = 0;

  842.         codec->sample_rate = 0;

  843.     }

  844.     /* override bits_per_coded_sample for G.726 */

  845.     if (codec->codec_id == AV_CODEC_ID_ADPCM_G726 && codec->sample_rate)

  846.         codec->bits_per_coded_sample = codec->bit_rate / codec->sample_rate;

  847. 

  848.     return 0;

  849. }

  850. 

  851. enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)

  852. {

  853.     enum AVCodecID id;

  854.     id = ff_codec_get_id(ff_codec_wav_tags, tag);

  855.     if (id <= 0)

  856.         return id;

  857. 

  858.     if (id == AV_CODEC_ID_PCM_S16LE)

  859.         id = ff_get_pcm_codec_id(bps, 0, 0, ~1);

  860.     else if (id == AV_CODEC_ID_PCM_F32LE)

  861.         id = ff_get_pcm_codec_id(bps, 1, 0,  0);

  862. 

  863.     if (id == AV_CODEC_ID_ADPCM_IMA_WAV && bps == 8)

  864.         id = AV_CODEC_ID_PCM_ZORK;

  865.     return id;

  866. }

  867. 

  868. int ff_get_bmp_header(AVIOContext *pb, AVStream *st, unsigned *esize)

  869. {

  870.     int tag1;

  871.     if(esize) *esize  = avio_rl32(pb);

  872.     else                avio_rl32(pb);

  873.     st->codec->width  = avio_rl32(pb);

  874.     st->codec->height = (int32_t)avio_rl32(pb);

  875.     avio_rl16(pb); /* planes */

  876.     st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */

  877.     tag1                             = avio_rl32(pb);

  878.     avio_rl32(pb); /* ImageSize */

  879.     avio_rl32(pb); /* XPelsPerMeter */

  880.     avio_rl32(pb); /* YPelsPerMeter */

  881.     avio_rl32(pb); /* ClrUsed */

  882.     avio_rl32(pb); /* ClrImportant */

  883.     return tag1;

  884. }

  885. 

  886. int ff_read_riff_info(AVFormatContext *s, int64_t size)

  887. {

  888.     int64_t start, end, cur;

  889.     AVIOContext *pb = s->pb;

  890. 

  891.     start = avio_tell(pb);

  892.     end   = start + size;

  893. 

  894.     while ((cur = avio_tell(pb)) >= 0 &&

  895.            cur <= end - 8 /* = tag + size */) {

  896.         uint32_t chunk_code;

  897.         int64_t chunk_size;

  898.         char key[5] = { 0 };

  899.         char *value;

  900. 

  901.         chunk_code = avio_rl32(pb);

  902.         chunk_size = avio_rl32(pb);

  903.         if (url_feof(pb)) {

  904.             if (chunk_code || chunk_size) {

  905.                 av_log(s, AV_LOG_WARNING, "INFO subchunk truncated\n");

  906.                 return AVERROR_INVALIDDATA;

  907.             }

  908.             return AVERROR_EOF;

  909.         }

  910.         if (chunk_size > end ||

  911.             end - chunk_size < cur ||

  912.             chunk_size == UINT_MAX) {

  913.             avio_seek(pb, -9, SEEK_CUR);

  914.             chunk_code = avio_rl32(pb);

  915.             chunk_size = avio_rl32(pb);

  916.             if (chunk_size > end || end - chunk_size < cur || chunk_size == UINT_MAX) {

  917.                 av_log(s, AV_LOG_WARNING, "too big INFO subchunk\n");

  918.                 return AVERROR_INVALIDDATA;

  919.             }

  920.         }

  921. 

  922.         chunk_size += (chunk_size & 1);

  923. 

  924.         if (!chunk_code) {

  925.             if (chunk_size)

  926.                 avio_skip(pb, chunk_size);

  927.             else if (pb->eof_reached) {

  928.                 av_log(s, AV_LOG_WARNING, "truncated file\n");

  929.                 return AVERROR_EOF;

  930.             }

  931.             continue;

  932.         }

  933. 

  934.         value = av_mallocz(chunk_size + 1);

  935.         if (!value) {

  936.             av_log(s, AV_LOG_ERROR,

  937.                    "out of memory, unable to read INFO tag\n");

  938.             return AVERROR(ENOMEM);

  939.         }

  940. 

  941.         AV_WL32(key, chunk_code);

  942. 

  943.         if (avio_read(pb, value, chunk_size) != chunk_size) {

  944.             av_log(s, AV_LOG_WARNING,

  945.                    "premature end of file while reading INFO tag\n");

  946.         }

  947. 

  948.         av_dict_set(&s->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);

  949.     }

  950. 

  951.     return 0;

  952. }

  953. #endif /* CONFIG_DEMUXERS */