falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
37556 Commits
32 Branches
283MB
Tree: e6496ea7e7
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'e6496ea7e7'
${ noResults }
FFmpeg/libavformat/riff.c

865 lines
36KB
Raw Blame History 

  1. /*

  2.  * RIFF common functions and data

  3.  * Copyright (c) 2000 Fabrice Bellard

  4.  *

  5.  * This file is part of Libav.

  6.  *

  7.  * Libav 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.  * Libav 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 Libav; 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. 

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

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

  31. const AVCodecTag ff_codec_bmp_tags[] = {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  49.     { AV_CODEC_ID_H263P,        MKTAG('U', '2', '6', '3') },

  50.     { AV_CODEC_ID_H263P,        MKTAG('v', 'i', 'v', '1') },

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

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

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

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

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

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

  57.     /* some broken AVIs use this */

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

  59.     /* some broken AVIs use this */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  81.     /* flipped video */

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

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

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

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

  86.     /* Ephv MPEG-4 */

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

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

  89.     /* Divio MPEG-4 */

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

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

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

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

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

  95.     /* Samsung SHR-6040 */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  121.     /* Canopus DV */

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

  123.     /* Canopus DV */

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

  125.     /* Canopus DV */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  154.     /* Pegasus lossless JPEG */

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

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

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

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

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

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

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

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

  163.     { AV_CODEC_ID_MJPEG,        MKTAG('A', 'V', 'R', 'n') },

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

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

  166.     /* SL M-JPEG */

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

  168.     /* Creative Webcam JPEG */

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

  170.     /* Intel JPEG Library Video Codec */

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

  172.     /* Midvid JPEG Video Codec */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  208.     /* SoftLab-NSK VideoTizer */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  320.     { AV_CODEC_ID_NONE,         0 }

  321. };

  322. 

  323. const AVCodecTag ff_codec_wav_tags[] = {

  324.     { AV_CODEC_ID_PCM_S16LE,       0x0001 },

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

  326.     { AV_CODEC_ID_PCM_U8,          0x0001 },

  327.     { AV_CODEC_ID_PCM_S24LE,       0x0001 },

  328.     { AV_CODEC_ID_PCM_S32LE,       0x0001 },

  329.     { AV_CODEC_ID_ADPCM_MS,        0x0002 },

  330.     { AV_CODEC_ID_PCM_F32LE,       0x0003 },

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

  332.     { AV_CODEC_ID_PCM_F64LE,       0x0003 },

  333.     { AV_CODEC_ID_PCM_ALAW,        0x0006 },

  334.     { AV_CODEC_ID_PCM_MULAW,       0x0007 },

  335.     { AV_CODEC_ID_WMAVOICE,        0x000A },

  336.     { AV_CODEC_ID_ADPCM_IMA_WAV,   0x0011 },

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

  338.     { AV_CODEC_ID_PCM_ZORK,        0x0011 },

  339.     { AV_CODEC_ID_ADPCM_YAMAHA,    0x0020 },

  340.     { AV_CODEC_ID_TRUESPEECH,      0x0022 },

  341.     { AV_CODEC_ID_GSM_MS,          0x0031 },

  342.     { AV_CODEC_ID_ADPCM_G726,      0x0045 },

  343.     { AV_CODEC_ID_MP2,             0x0050 },

  344.     { AV_CODEC_ID_MP3,             0x0055 },

  345.     { AV_CODEC_ID_AMR_NB,          0x0057 },

  346.     { AV_CODEC_ID_AMR_WB,          0x0058 },

  347.     /* rogue format number */

  348.     { AV_CODEC_ID_ADPCM_IMA_DK4,   0x0061 },

  349.     /* rogue format number */

  350.     { AV_CODEC_ID_ADPCM_IMA_DK3,   0x0062 },

  351.     { AV_CODEC_ID_ADPCM_IMA_WAV,   0x0069 },

  352.     { AV_CODEC_ID_VOXWARE,         0x0075 },

  353.     { AV_CODEC_ID_AAC,             0x00ff },

  354.     { AV_CODEC_ID_SIPR,            0x0130 },

  355.     { AV_CODEC_ID_WMAV1,           0x0160 },

  356.     { AV_CODEC_ID_WMAV2,           0x0161 },

  357.     { AV_CODEC_ID_WMAPRO,          0x0162 },

  358.     { AV_CODEC_ID_WMALOSSLESS,     0x0163 },

  359.     { AV_CODEC_ID_ADPCM_CT,        0x0200 },

  360.     { AV_CODEC_ID_ATRAC3,          0x0270 },

  361.     { AV_CODEC_ID_ADPCM_G722,      0x028F },

  362.     { AV_CODEC_ID_IMC,             0x0401 },

  363.     { AV_CODEC_ID_IAC,             0x0402 },

  364.     { AV_CODEC_ID_GSM_MS,          0x1500 },

  365.     { AV_CODEC_ID_TRUESPEECH,      0x1501 },

  366.     /* ADTS AAC */

  367.     { AV_CODEC_ID_AAC,             0x1600 },

  368.     { AV_CODEC_ID_AAC_LATM,        0x1602 },

  369.     { AV_CODEC_ID_AC3,             0x2000 },

  370.     { AV_CODEC_ID_DTS,             0x2001 },

  371.     { AV_CODEC_ID_PCM_MULAW,       0x6c75 },

  372.     { AV_CODEC_ID_AAC,             0x706d },

  373.     { AV_CODEC_ID_AAC,             0x4143 },

  374.     { AV_CODEC_ID_SPEEX,           0xA109 },

  375.     { AV_CODEC_ID_FLAC,            0xF1AC },

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

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

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

  379.     { AV_CODEC_ID_NONE,      0 },

  380. };

  381. 

  382. const AVCodecGuid ff_codec_wav_guids[] = {

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

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

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

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

  387.     { AV_CODEC_ID_NONE }

  388. };

  389. 

  390. const AVMetadataConv ff_riff_info_conv[] = {

  391.     { "IART", "artist"     },

  392.     { "ICMT", "comment"    },

  393.     { "ICOP", "copyright"  },

  394.     { "ICRD", "date"       },

  395.     { "IGNR", "genre"      },

  396.     { "ILNG", "language"   },

  397.     { "INAM", "title"      },

  398.     { "IPRD", "album"      },

  399.     { "IPRT", "track"      },

  400.     { "ISFT", "encoder"    },

  401.     { "ITCH", "encoded_by" },

  402.     { 0 },

  403. };

  404. 

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

  406. {

  407.     int i;

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

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

  410.             return guids[i].id;

  411.     return AV_CODEC_ID_NONE;

  412. }

  413. 

  414. #if CONFIG_MUXERS

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

  416. {

  417.     ffio_wfourcc(pb, tag);

  418.     avio_wl32(pb, 0);

  419.     return avio_tell(pb);

  420. }

  421. 

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

  423. {

  424.     int64_t pos;

  425. 

  426.     pos = avio_tell(pb);

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

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

  429.     avio_seek(pb, pos, SEEK_SET);

  430. }

  431. 

  432. /* WAVEFORMATEX header */

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

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

  435. {

  436.     int bps, blkalign, bytespersec, frame_size;

  437.     int hdrsize = 18;

  438.     int waveformatextensible;

  439.     uint8_t temp[256];

  440.     uint8_t *riff_extradata       = temp;

  441.     uint8_t *riff_extradata_start = temp;

  442. 

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

  444.         return -1;

  445. 

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

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

  448.      * for indicating packet duration. */

  449.     frame_size = av_get_audio_frame_duration(enc, 0);

  450.     if (!frame_size)

  451.         frame_size = enc->frame_size;

  452. 

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

  454.                            enc->sample_rate > 48000 ||

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

  456. 

  457.     if (waveformatextensible)

  458.         avio_wl16(pb, 0xfffe);

  459.     else

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

  461. 

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

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

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

  465.         enc->codec_id == AV_CODEC_ID_MP3 ||

  466.         enc->codec_id == AV_CODEC_ID_GSM_MS) {

  467.         bps = 0;

  468.     } else {

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

  470.             if (enc->bits_per_coded_sample)

  471.                 bps = enc->bits_per_coded_sample;

  472.             else

  473.                 bps = 16;  // default to 16

  474.         }

  475.     }

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

  477.         av_log(enc, AV_LOG_WARNING,

  478.                "requested bits_per_coded_sample (%d) "

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

  480.                enc->bits_per_coded_sample, bps);

  481.     }

  482. 

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

  484.         enc->codec_id == AV_CODEC_ID_MP3) {

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

  486.          * is set correctly. */

  487.         blkalign = frame_size;

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

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

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

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

  492.         blkalign = enc->block_align;

  493.     } else

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

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

  496.         enc->codec_id == AV_CODEC_ID_PCM_S24LE ||

  497.         enc->codec_id == AV_CODEC_ID_PCM_S32LE ||

  498.         enc->codec_id == AV_CODEC_ID_PCM_F32LE ||

  499.         enc->codec_id == AV_CODEC_ID_PCM_F64LE ||

  500.         enc->codec_id == AV_CODEC_ID_PCM_S16LE) {

  501.         bytespersec = enc->sample_rate * blkalign;

  502.     } else {

  503.         bytespersec = enc->bit_rate / 8;

  504.     }

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

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

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

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

  509.         hdrsize += 12;

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

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

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

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

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

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

  516.         hdrsize += 22;

  517.         /* fwHeadLayer */

  518.         bytestream_put_le16(&riff_extradata, 2);

  519.         /* dwHeadBitrate */

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

  521.         /* fwHeadMode */

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

  523.         /* fwHeadModeExt */

  524.         bytestream_put_le16(&riff_extradata, 0);

  525.         /* wHeadEmphasis */

  526.         bytestream_put_le16(&riff_extradata, 1);

  527.         /* fwHeadFlags */

  528.         bytestream_put_le16(&riff_extradata, 16);

  529.         /* dwPTSLow */

  530.         bytestream_put_le32(&riff_extradata, 0);

  531.         /* dwPTSHigh */

  532.         bytestream_put_le32(&riff_extradata, 0);

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

  534.                enc->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {

  535.         hdrsize += 2;

  536.         /* wSamplesPerBlock */

  537.         bytestream_put_le16(&riff_extradata, frame_size);

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

  539.         riff_extradata_start = enc->extradata;

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

  541.         hdrsize             += enc->extradata_size;

  542.     }

  543.     /* write WAVEFORMATEXTENSIBLE extensions */

  544.     if (waveformatextensible) {

  545.         hdrsize += 22;

  546.         /* 22 is WAVEFORMATEXTENSIBLE size */

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

  548.         /* ValidBitsPerSample || SamplesPerBlock || Reserved */

  549.         avio_wl16(pb, bps);

  550.         /* dwChannelMask */

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

  552.         /* GUID + next 3 */

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

  554.         avio_wl32(pb, 0x00100000);

  555.         avio_wl32(pb, 0xAA000080);

  556.         avio_wl32(pb, 0x719B3800);

  557.     } else {

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

  559.     }

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

  561.     if (hdrsize & 1) {

  562.         hdrsize++;

  563.         avio_w8(pb, 0);

  564.     }

  565. 

  566.     return hdrsize;

  567. }

  568. 

  569. /* BITMAPINFOHEADER header */

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

  571.                        const AVCodecTag *tags, int for_asf)

  572. {

  573.     /* size */

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

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

  576.     //We always store RGB TopDown

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

  578.     /* planes */

  579.     avio_wl16(pb, 1);

  580.     /* depth */

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

  582.     /* compression type */

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

  584.     avio_wl32(pb, enc->width * enc->height * 3);

  585.     avio_wl32(pb, 0);

  586.     avio_wl32(pb, 0);

  587.     avio_wl32(pb, 0);

  588.     avio_wl32(pb, 0);

  589. 

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

  591. 

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

  593.         avio_w8(pb, 0);

  594. }

  595. 

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

  597.                               int *au_ssize, int *au_scale)

  598. {

  599.     int gcd;

  600.     int audio_frame_size;

  601. 

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

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

  604.      * for indicating packet duration. */

  605.     audio_frame_size = av_get_audio_frame_duration(stream, 0);

  606.     if (!audio_frame_size)

  607.         audio_frame_size = stream->frame_size;

  608. 

  609.     *au_ssize = stream->block_align;

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

  611.         *au_scale = audio_frame_size;

  612.         *au_rate  = stream->sample_rate;

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

  614.                stream->codec_type == AVMEDIA_TYPE_DATA ||

  615.                stream->codec_type == AVMEDIA_TYPE_SUBTITLE) {

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

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

  618.     } else {

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

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

  621.                     8 * stream->sample_rate;

  622.     }

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

  624.     *au_scale /= gcd;

  625.     *au_rate  /= gcd;

  626. }

  627. 

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

  629. {

  630.     int len = strlen(str);

  631.     if (len > 0) {

  632.         len++;

  633.         ffio_wfourcc(pb, tag);

  634.         avio_wl32(pb, len);

  635.         avio_put_str(pb, str);

  636.         if (len & 1)

  637.             avio_w8(pb, 0);

  638.     }

  639. }

  640. 

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

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

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

  644.     "IPRT", "ISBJ", "ISFT", "ISHP", "ISRC", "ISRF", "ITCH",

  645.     { 0 }

  646. };

  647. 

  648. static int riff_has_valid_tags(AVFormatContext *s)

  649. {

  650.     int i;

  651. 

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

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

  654.             return 1;

  655. 

  656.     return 0;

  657. }

  658. 

  659. void ff_riff_write_info(AVFormatContext *s)

  660. {

  661.     AVIOContext *pb = s->pb;

  662.     int i;

  663.     int64_t list_pos;

  664.     AVDictionaryEntry *t = NULL;

  665. 

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

  667. 

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

  669.     if (!riff_has_valid_tags(s))

  670.         return;

  671. 

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

  673.     ffio_wfourcc(pb, "INFO");

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

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

  676.                              NULL, AV_DICT_MATCH_CASE)))

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

  678.     ff_end_tag(pb, list_pos);

  679. }

  680. #endif /* CONFIG_MUXERS */

  681. 

  682. #if CONFIG_DEMUXERS

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

  684.  * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure

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

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

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

  688.  * an openended structure.

  689.  */

  690. 

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

  692. {

  693.     ff_asf_guid subformat;

  694.     c->bits_per_coded_sample = avio_rl16(pb);

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

  696. 

  697.     ff_get_guid(pb, &subformat);

  698.     if (!memcmp(subformat + 4,

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

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

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

  702.                                            c->bits_per_coded_sample);

  703.     } else {

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

  705.         if (!c->codec_id)

  706.             av_log(c, AV_LOG_WARNING,

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

  708.                    FF_ARG_GUID(subformat));

  709.     }

  710. }

  711. 

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

  713. {

  714.     int id;

  715. 

  716.     id                 = avio_rl16(pb);

  717.     codec->codec_type  = AVMEDIA_TYPE_AUDIO;

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

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

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

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

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

  723.         codec->bits_per_coded_sample = 8;

  724.     } else

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

  726.     if (id == 0xFFFE) {

  727.         codec->codec_tag = 0;

  728.     } else {

  729.         codec->codec_tag = id;

  730.         codec->codec_id  = ff_wav_codec_get_id(id,

  731.                                                codec->bits_per_coded_sample);

  732.     }

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

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

  735.         size  -= 18;

  736.         cbSize = FFMIN(size, cbSize);

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

  738.             parse_waveformatex(pb, codec);

  739.             cbSize -= 22;

  740.             size   -= 22;

  741.         }

  742.         codec->extradata_size = cbSize;

  743.         if (cbSize > 0) {

  744.             av_free(codec->extradata);

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

  746.                                           FF_INPUT_BUFFER_PADDING_SIZE);

  747.             if (!codec->extradata)

  748.                 return AVERROR(ENOMEM);

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

  750.             size -= cbSize;

  751.         }

  752. 

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

  754.         if (size > 0)

  755.             avio_skip(pb, size);

  756.     }

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

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

  759.          * and/or PS. */

  760.         codec->channels    = 0;

  761.         codec->sample_rate = 0;

  762.     }

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

  764.     if (codec->codec_id == AV_CODEC_ID_ADPCM_G726)

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

  766. 

  767.     return 0;

  768. }

  769. 

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

  771. {

  772.     enum AVCodecID id;

  773.     id = ff_codec_get_id(ff_codec_wav_tags, tag);

  774.     if (id <= 0)

  775.         return id;

  776. 

  777.     if (id == AV_CODEC_ID_PCM_S16LE)

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

  779.     else if (id == AV_CODEC_ID_PCM_F32LE)

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

  781. 

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

  783.         id = AV_CODEC_ID_PCM_ZORK;

  784.     return id;

  785. }

  786. 

  787. int ff_get_bmp_header(AVIOContext *pb, AVStream *st)

  788. {

  789.     int tag1;

  790.     avio_rl32(pb); /* size */

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

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

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

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

  795.     tag1                             = avio_rl32(pb);

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

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

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

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

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

  801.     return tag1;

  802. }

  803. 

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

  805. {

  806.     int64_t start, end, cur;

  807.     AVIOContext *pb = s->pb;

  808. 

  809.     start = avio_tell(pb);

  810.     end   = start + size;

  811. 

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

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

  814.         uint32_t chunk_code;

  815.         int64_t chunk_size;

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

  817.         char *value;

  818. 

  819.         chunk_code = avio_rl32(pb);

  820.         chunk_size = avio_rl32(pb);

  821. 

  822.         if (chunk_size > end ||

  823.             end - chunk_size < cur ||

  824.             chunk_size == UINT_MAX) {

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

  826.             break;

  827.         }

  828. 

  829.         chunk_size += (chunk_size & 1);

  830. 

  831.         if (!chunk_code) {

  832.             if (chunk_size)

  833.                 avio_skip(pb, chunk_size);

  834.             else if (pb->eof_reached) {

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

  836.                 return AVERROR_EOF;

  837.             }

  838.             continue;

  839.         }

  840. 

  841.         value = av_malloc(chunk_size + 1);

  842.         if (!value) {

  843.             av_log(s, AV_LOG_ERROR,

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

  845.             return AVERROR(ENOMEM);

  846.         }

  847. 

  848.         AV_WL32(key, chunk_code);

  849. 

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

  851.             av_free(value);

  852.             av_log(s, AV_LOG_WARNING,

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

  854.             break;

  855.         }

  856. 

  857.         value[chunk_size] = 0;

  858. 

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

  860.     }

  861. 

  862.     return 0;

  863. }

  864. #endif /* CONFIG_DEMUXERS */