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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_G2M,          MKTAG('G', '2', 'M', '2') },

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

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

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

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

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

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

  335.     { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'Y', '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_EXR,          MKTAG('e', 'x', 'r', ' ') },

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

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

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

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

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

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

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

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

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

  352.     { AV_CODEC_ID_NONE,         0 }

  353. };

  354. 

  355. const AVCodecTag ff_codec_wav_tags[] = {

  356.     { AV_CODEC_ID_PCM_S16LE,       0x0001 },

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

  358.     { AV_CODEC_ID_PCM_U8,          0x0001 },

  359.     { AV_CODEC_ID_PCM_S24LE,       0x0001 },

  360.     { AV_CODEC_ID_PCM_S32LE,       0x0001 },

  361.     { AV_CODEC_ID_ADPCM_MS,        0x0002 },

  362.     { AV_CODEC_ID_PCM_F32LE,       0x0003 },

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

  364.     { AV_CODEC_ID_PCM_F64LE,       0x0003 },

  365.     { AV_CODEC_ID_PCM_ALAW,        0x0006 },

  366.     { AV_CODEC_ID_PCM_MULAW,       0x0007 },

  367.     { AV_CODEC_ID_WMAVOICE,        0x000A },

  368.     { AV_CODEC_ID_ADPCM_IMA_OKI,   0x0010 },

  369.     { AV_CODEC_ID_ADPCM_IMA_WAV,   0x0011 },

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

  371.     { AV_CODEC_ID_PCM_ZORK,        0x0011 },

  372.     { AV_CODEC_ID_ADPCM_IMA_OKI,   0x0017 },

  373.     { AV_CODEC_ID_ADPCM_YAMAHA,    0x0020 },

  374.     { AV_CODEC_ID_TRUESPEECH,      0x0022 },

  375.     { AV_CODEC_ID_GSM_MS,          0x0031 },

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

  377.     { AV_CODEC_ID_G723_1,          0x0042 },

  378.     { AV_CODEC_ID_ADPCM_G726,      0x0045 },

  379.     { AV_CODEC_ID_MP2,             0x0050 },

  380.     { AV_CODEC_ID_MP3,             0x0055 },

  381.     { AV_CODEC_ID_AMR_NB,          0x0057 },

  382.     { AV_CODEC_ID_AMR_WB,          0x0058 },

  383.     /* rogue format number */

  384.     { AV_CODEC_ID_ADPCM_IMA_DK4,   0x0061 },

  385.     /* rogue format number */

  386.     { AV_CODEC_ID_ADPCM_IMA_DK3,   0x0062 },

  387.     { AV_CODEC_ID_ADPCM_IMA_WAV,   0x0069 },

  388.     { AV_CODEC_ID_VOXWARE,         0x0075 },

  389.     { AV_CODEC_ID_AAC,             0x00ff },

  390.     { AV_CODEC_ID_SIPR,            0x0130 },

  391.     { AV_CODEC_ID_WMAV1,           0x0160 },

  392.     { AV_CODEC_ID_WMAV2,           0x0161 },

  393.     { AV_CODEC_ID_WMAPRO,          0x0162 },

  394.     { AV_CODEC_ID_WMALOSSLESS,     0x0163 },

  395.     { AV_CODEC_ID_ADPCM_CT,        0x0200 },

  396.     { AV_CODEC_ID_ATRAC3,          0x0270 },

  397.     { AV_CODEC_ID_ADPCM_G722,      0x028F },

  398.     { AV_CODEC_ID_IMC,             0x0401 },

  399.     { AV_CODEC_ID_IAC,             0x0402 },

  400.     { AV_CODEC_ID_GSM_MS,          0x1500 },

  401.     { AV_CODEC_ID_TRUESPEECH,      0x1501 },

  402.     /* ADTS AAC */

  403.     { AV_CODEC_ID_AAC,             0x1600 },

  404.     { AV_CODEC_ID_AAC_LATM,        0x1602 },

  405.     { AV_CODEC_ID_AC3,             0x2000 },

  406.     { AV_CODEC_ID_DTS,             0x2001 },

  407.     { AV_CODEC_ID_SONIC,           0x2048 },

  408.     { AV_CODEC_ID_SONIC_LS,        0x2048 },

  409.     { AV_CODEC_ID_PCM_MULAW,       0x6c75 },

  410.     { AV_CODEC_ID_AAC,             0x706d },

  411.     { AV_CODEC_ID_AAC,             0x4143 },

  412.     { AV_CODEC_ID_G723_1,          0xA100 },

  413.     { AV_CODEC_ID_AAC,             0xA106 },

  414.     { AV_CODEC_ID_SPEEX,           0xA109 },

  415.     { AV_CODEC_ID_FLAC,            0xF1AC },

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

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

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

  419.     { AV_CODEC_ID_NONE,      0 },

  420. };

  421. 

  422. const AVCodecGuid ff_codec_wav_guids[] = {

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

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

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

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

  427.     {AV_CODEC_ID_NONE}

  428. };

  429. 

  430. const AVMetadataConv ff_riff_info_conv[] = {

  431.     { "IART", "artist"     },

  432.     { "ICMT", "comment"    },

  433.     { "ICOP", "copyright"  },

  434.     { "ICRD", "date"       },

  435.     { "IGNR", "genre"      },

  436.     { "ILNG", "language"   },

  437.     { "INAM", "title"      },

  438.     { "IPRD", "album"      },

  439.     { "IPRT", "track"      },

  440.     { "ISFT", "encoder"    },

  441.     { "ISMP", "timecode"   },

  442.     { "ITCH", "encoded_by" },

  443.     { 0 },

  444. };

  445. 

  446. #if CONFIG_MUXERS

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

  448. {

  449.     ffio_wfourcc(pb, tag);

  450.     avio_wl32(pb, 0);

  451.     return avio_tell(pb);

  452. }

  453. 

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

  455. {

  456.     int64_t pos;

  457. 

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

  459. 

  460.     pos = avio_tell(pb);

  461.     if (pos & 1)

  462.         avio_w8(pb, 0);

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

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

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

  466. }

  467. 

  468. /* WAVEFORMATEX header */

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

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

  471. {

  472.     int bps, blkalign, bytespersec, frame_size;

  473.     int hdrsize = 18;

  474.     int waveformatextensible;

  475.     uint8_t temp[256];

  476.     uint8_t *riff_extradata       = temp;

  477.     uint8_t *riff_extradata_start = temp;

  478. 

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

  480.         return -1;

  481. 

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

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

  484.      * for indicating packet duration. */

  485.     frame_size = av_get_audio_frame_duration(enc, 0);

  486.     if (!frame_size)

  487.         frame_size = enc->frame_size;

  488. 

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

  490.                            enc->sample_rate > 48000 ||

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

  492. 

  493.     if (waveformatextensible)

  494.         avio_wl16(pb, 0xfffe);

  495.     else

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

  497. 

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

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

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

  501.         enc->codec_id == AV_CODEC_ID_G723_1 ||

  502.         enc->codec_id == AV_CODEC_ID_MP2    ||

  503.         enc->codec_id == AV_CODEC_ID_MP3    ||

  504.         enc->codec_id == AV_CODEC_ID_GSM_MS) {

  505.         bps = 0;

  506.     } else {

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

  508.             if (enc->bits_per_coded_sample)

  509.                 bps = enc->bits_per_coded_sample;

  510.             else

  511.                 bps = 16;  // default to 16

  512.         }

  513.     }

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

  515.         av_log(enc, AV_LOG_WARNING,

  516.                "requested bits_per_coded_sample (%d) "

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

  518.                enc->bits_per_coded_sample, bps);

  519.     }

  520. 

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

  522.         enc->codec_id == AV_CODEC_ID_MP3) {

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

  524.          * is set correctly. */

  525.         blkalign = frame_size;

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

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

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

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

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

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

  532.         blkalign = 24;

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

  534.         blkalign = enc->block_align;

  535.     } else

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

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

  538.         enc->codec_id == AV_CODEC_ID_PCM_S24LE ||

  539.         enc->codec_id == AV_CODEC_ID_PCM_S32LE ||

  540.         enc->codec_id == AV_CODEC_ID_PCM_F32LE ||

  541.         enc->codec_id == AV_CODEC_ID_PCM_F64LE ||

  542.         enc->codec_id == AV_CODEC_ID_PCM_S16LE) {

  543.         bytespersec = enc->sample_rate * blkalign;

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

  545.         bytespersec = 800;

  546.     } else {

  547.         bytespersec = enc->bit_rate / 8;

  548.     }

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

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

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

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

  553.         hdrsize += 12;

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

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

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

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

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

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

  560.         hdrsize += 22;

  561.         /* fwHeadLayer */

  562.         bytestream_put_le16(&riff_extradata, 2);

  563.         /* dwHeadBitrate */

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

  565.         /* fwHeadMode */

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

  567.         /* fwHeadModeExt */

  568.         bytestream_put_le16(&riff_extradata, 0);

  569.         /* wHeadEmphasis */

  570.         bytestream_put_le16(&riff_extradata, 1);

  571.         /* fwHeadFlags */

  572.         bytestream_put_le16(&riff_extradata, 16);

  573.         /* dwPTSLow */

  574.         bytestream_put_le32(&riff_extradata, 0);

  575.         /* dwPTSHigh */

  576.         bytestream_put_le32(&riff_extradata, 0);

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

  578.         hdrsize += 20;

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

  580.         bytestream_put_le32(&riff_extradata, 0xaea2f732);

  581.         bytestream_put_le16(&riff_extradata, 0xacde);

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

  583.                enc->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {

  584.         hdrsize += 2;

  585.         /* wSamplesPerBlock */

  586.         bytestream_put_le16(&riff_extradata, frame_size);

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

  588.         riff_extradata_start = enc->extradata;

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

  590.         hdrsize             += enc->extradata_size;

  591.     }

  592.     /* write WAVEFORMATEXTENSIBLE extensions */

  593.     if (waveformatextensible) {

  594.         hdrsize += 22;

  595.         /* 22 is WAVEFORMATEXTENSIBLE size */

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

  597.         /* ValidBitsPerSample || SamplesPerBlock || Reserved */

  598.         avio_wl16(pb, bps);

  599.         /* dwChannelMask */

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

  601.         /* GUID + next 3 */

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

  603.         avio_wl32(pb, 0x00100000);

  604.         avio_wl32(pb, 0xAA000080);

  605.         avio_wl32(pb, 0x719B3800);

  606.     } else {

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

  608.     }

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

  610.     if (hdrsize & 1) {

  611.         hdrsize++;

  612.         avio_w8(pb, 0);

  613.     }

  614. 

  615.     return hdrsize;

  616. }

  617. 

  618. /* BITMAPINFOHEADER header */

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

  620.                        const AVCodecTag *tags, int for_asf)

  621. {

  622.     /* size */

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

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

  625.     //We always store RGB TopDown

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

  627.     /* planes */

  628.     avio_wl16(pb, 1);

  629.     /* depth */

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

  631.     /* compression type */

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

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

  634.     avio_wl32(pb, 0);

  635.     avio_wl32(pb, 0);

  636.     avio_wl32(pb, 0);

  637.     avio_wl32(pb, 0);

  638. 

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

  640. 

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

  642.         avio_w8(pb, 0);

  643. }

  644. 

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

  646.                               int *au_ssize, int *au_scale)

  647. {

  648.     int gcd;

  649.     int audio_frame_size;

  650. 

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

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

  653.      * for indicating packet duration. */

  654.     audio_frame_size = av_get_audio_frame_duration(stream, 0);

  655.     if (!audio_frame_size)

  656.         audio_frame_size = stream->frame_size;

  657. 

  658.     *au_ssize = stream->block_align;

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

  660.         *au_scale = audio_frame_size;

  661.         *au_rate  = stream->sample_rate;

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

  663.                stream->codec_type == AVMEDIA_TYPE_DATA ||

  664.                stream->codec_type == AVMEDIA_TYPE_SUBTITLE) {

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

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

  667.     } else {

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

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

  670.                     8 * stream->sample_rate;

  671.     }

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

  673.     *au_scale /= gcd;

  674.     *au_rate  /= gcd;

  675. }

  676. 

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

  678. {

  679.     int len = strlen(str);

  680.     if (len > 0) {

  681.         len++;

  682.         ffio_wfourcc(pb, tag);

  683.         avio_wl32(pb, len);

  684.         avio_put_str(pb, str);

  685.         if (len & 1)

  686.             avio_w8(pb, 0);

  687.     }

  688. }

  689. 

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

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

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

  693.     "IPRT", "ISBJ", "ISFT", "ISHP", "ISMP", "ISRC", "ISRF", "ITCH",

  694.     { 0 }

  695. };

  696. 

  697. static int riff_has_valid_tags(AVFormatContext *s)

  698. {

  699.     int i;

  700. 

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

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

  703.             return 1;

  704. 

  705.     return 0;

  706. }

  707. 

  708. void ff_riff_write_info(AVFormatContext *s)

  709. {

  710.     AVIOContext *pb = s->pb;

  711.     int i;

  712.     int64_t list_pos;

  713.     AVDictionaryEntry *t = NULL;

  714. 

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

  716. 

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

  718.     if (!riff_has_valid_tags(s))

  719.         return;

  720. 

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

  722.     ffio_wfourcc(pb, "INFO");

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

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

  725.                              NULL, AV_DICT_MATCH_CASE)))

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

  727.     ff_end_tag(pb, list_pos);

  728. }

  729. #endif /* CONFIG_MUXERS */

  730. 

  731. #if CONFIG_DEMUXERS

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

  733.  * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure

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

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

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

  737.  * an openended structure.

  738.  */

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

  740. {

  741.     int id;

  742. 

  743.     id                 = avio_rl16(pb);

  744.     codec->codec_type  = AVMEDIA_TYPE_AUDIO;

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

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

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

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

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

  750.         codec->bits_per_coded_sample = 8;

  751.     } else

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

  753.     if (id == 0xFFFE) {

  754.         codec->codec_tag = 0;

  755.     } else {

  756.         codec->codec_tag = id;

  757.         codec->codec_id = ff_wav_codec_get_id(id, codec->bits_per_coded_sample);

  758.     }

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

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

  761.         size  -= 18;

  762.         cbSize = FFMIN(size, cbSize);

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

  764.             ff_asf_guid subformat;

  765.             int bps = avio_rl16(pb);

  766.             if (bps)

  767.                 codec->bits_per_coded_sample = bps;

  768.             codec->channel_layout        = avio_rl32(pb); /* dwChannelMask */

  769.             ff_get_guid(pb, &subformat);

  770.             if (!memcmp(subformat + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {

  771.                 codec->codec_tag = AV_RL32(subformat);

  772.                 codec->codec_id = ff_wav_codec_get_id(codec->codec_tag, codec->bits_per_coded_sample);

  773.             } else {

  774.                 codec->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subformat);

  775.                 if (!codec->codec_id)

  776.                     av_log(codec, AV_LOG_WARNING, "unknown subformat:"FF_PRI_GUID"\n", FF_ARG_GUID(subformat));

  777.             }

  778.             cbSize -= 22;

  779.             size   -= 22;

  780.         }

  781.         codec->extradata_size = cbSize;

  782.         if (cbSize > 0) {

  783.             av_free(codec->extradata);

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

  785.                                           FF_INPUT_BUFFER_PADDING_SIZE);

  786.             if (!codec->extradata)

  787.                 return AVERROR(ENOMEM);

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

  789.             size -= cbSize;

  790.         }

  791. 

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

  793.         if (size > 0)

  794.             avio_skip(pb, size);

  795.     }

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

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

  798.          * and/or PS. */

  799.         codec->channels    = 0;

  800.         codec->sample_rate = 0;

  801.     }

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

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

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

  805. 

  806.     return 0;

  807. }

  808. 

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

  810. {

  811.     enum AVCodecID id;

  812.     id = ff_codec_get_id(ff_codec_wav_tags, tag);

  813.     if (id <= 0)

  814.         return id;

  815. 

  816.     if (id == AV_CODEC_ID_PCM_S16LE)

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

  818.     else if (id == AV_CODEC_ID_PCM_F32LE)

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

  820. 

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

  822.         id = AV_CODEC_ID_PCM_ZORK;

  823.     return id;

  824. }

  825. 

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

  827. {

  828.     int tag1;

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

  830.     else                avio_rl32(pb);

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

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

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

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

  835.     tag1                             = avio_rl32(pb);

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

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

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

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

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

  841.     return tag1;

  842. }

  843. 

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

  845. {

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

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

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

  849. }

  850. 

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

  852. {

  853.     int i;

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

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

  856.             return guids[i].id;

  857.     }

  858.     return AV_CODEC_ID_NONE;

  859. }

  860. 

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

  862. {

  863.     int64_t start, end, cur;

  864.     AVIOContext *pb = s->pb;

  865. 

  866.     start = avio_tell(pb);

  867.     end   = start + size;

  868. 

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

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

  871.         uint32_t chunk_code;

  872.         int64_t chunk_size;

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

  874.         char *value;

  875. 

  876.         chunk_code = avio_rl32(pb);

  877.         chunk_size = avio_rl32(pb);

  878.         if (url_feof(pb)) {

  879.             if (chunk_code || chunk_size) {

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

  881.                 return AVERROR_INVALIDDATA;

  882.             }

  883.             return AVERROR_EOF;

  884.         }

  885.         if (chunk_size > end ||

  886.             end - chunk_size < cur ||

  887.             chunk_size == UINT_MAX) {

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

  889.             chunk_code = avio_rl32(pb);

  890.             chunk_size = avio_rl32(pb);

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

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

  893.                 return AVERROR_INVALIDDATA;

  894.             }

  895.         }

  896. 

  897.         chunk_size += (chunk_size & 1);

  898. 

  899.         if (!chunk_code) {

  900.             if (chunk_size)

  901.                 avio_skip(pb, chunk_size);

  902.             else if (pb->eof_reached) {

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

  904.                 return AVERROR_EOF;

  905.             }

  906.             continue;

  907.         }

  908. 

  909.         value = av_mallocz(chunk_size + 1);

  910.         if (!value) {

  911.             av_log(s, AV_LOG_ERROR,

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

  913.             return AVERROR(ENOMEM);

  914.         }

  915. 

  916.         AV_WL32(key, chunk_code);

  917. 

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

  919.             av_log(s, AV_LOG_WARNING,

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

  921.         }

  922. 

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

  924.     }

  925. 

  926.     return 0;

  927. }

  928. #endif /* CONFIG_DEMUXERS */