libavformat/riff.c

   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 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 h263 */
  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     { AV_CODEC_ID_MPEG4,        MKTAG( 4 ,  0 ,  0 ,  0 ) }, /* some broken avi use this */
  58     { AV_CODEC_ID_MPEG4,        MKTAG('Z', 'M', 'P', '4') }, /* some broken avi use this */
  59     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'I', 'V', '1') },
  60     { AV_CODEC_ID_MPEG4,        MKTAG('B', 'L', 'Z', '0') },
  61     { AV_CODEC_ID_MPEG4,        MKTAG('m', 'p', '4', 'v') },
  62     { AV_CODEC_ID_MPEG4,        MKTAG('U', 'M', 'P', '4') },
  63     { AV_CODEC_ID_MPEG4,        MKTAG('W', 'V', '1', 'F') },
  64     { AV_CODEC_ID_MPEG4,        MKTAG('S', 'E', 'D', 'G') },
  65     { AV_CODEC_ID_MPEG4,        MKTAG('R', 'M', 'P', '4') },
  66     { AV_CODEC_ID_MPEG4,        MKTAG('3', 'I', 'V', '2') },
  67     { AV_CODEC_ID_MPEG4,        MKTAG('W', 'A', 'W', 'V') }, /* WaWv MPEG-4 Video Codec */
  68     { AV_CODEC_ID_MPEG4,        MKTAG('F', 'F', 'D', 'S') },
  69     { AV_CODEC_ID_MPEG4,        MKTAG('F', 'V', 'F', 'W') },
  70     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'C', 'O', 'D') },
  71     { AV_CODEC_ID_MPEG4,        MKTAG('M', 'V', 'X', 'M') },
  72     { AV_CODEC_ID_MPEG4,        MKTAG('P', 'M', '4', 'V') },
  73     { AV_CODEC_ID_MPEG4,        MKTAG('S', 'M', 'P', '4') },
  74     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'X', 'G', 'M') },
  75     { AV_CODEC_ID_MPEG4,        MKTAG('V', 'I', 'D', 'M') },
  76     { AV_CODEC_ID_MPEG4,        MKTAG('M', '4', 'T', '3') },
  77     { AV_CODEC_ID_MPEG4,        MKTAG('G', 'E', 'O', 'X') },
  78     { AV_CODEC_ID_MPEG4,        MKTAG('H', 'D', 'X', '4') }, /* flipped video */
  79     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'M', 'K', '2') },
  80     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'I', 'G', 'I') },
  81     { AV_CODEC_ID_MPEG4,        MKTAG('I', 'N', 'M', 'C') },
  82     { AV_CODEC_ID_MPEG4,        MKTAG('E', 'P', 'H', 'V') }, /* Ephv MPEG-4 */
  83     { AV_CODEC_ID_MPEG4,        MKTAG('E', 'M', '4', 'A') },
  84     { AV_CODEC_ID_MPEG4,        MKTAG('M', '4', 'C', 'C') }, /* Divio MPEG-4 */
  85     { AV_CODEC_ID_MPEG4,        MKTAG('S', 'N', '4', '0') },
  86     { AV_CODEC_ID_MPEG4,        MKTAG('V', 'S', 'P', 'X') },
  87     { AV_CODEC_ID_MPEG4,        MKTAG('U', 'L', 'D', 'X') },
  88     { AV_CODEC_ID_MPEG4,        MKTAG('G', 'E', 'O', 'V') },
  89     { AV_CODEC_ID_MPEG4,        MKTAG('S', 'I', 'P', 'P') }, /* Samsung SHR-6040 */
  90     { AV_CODEC_ID_MPEG4,        MKTAG('X', 'V', 'I', 'X') },
  91     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'r', 'e', 'X') },
  92     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('M', 'P', '4', '3') },
  93     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '3') },
  94     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('M', 'P', 'G', '3') },
  95     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '5') },
  96     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '6') },
  97     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '4') },
  98     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('D', 'V', 'X', '3') },
  99     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('A', 'P', '4', '1') },
 100     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('C', 'O', 'L', '1') },
 101     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('C', 'O', 'L', '0') },
 102     { AV_CODEC_ID_MSMPEG4V2,    MKTAG('M', 'P', '4', '2') },
 103     { AV_CODEC_ID_MSMPEG4V2,    MKTAG('D', 'I', 'V', '2') },
 104     { AV_CODEC_ID_MSMPEG4V1,    MKTAG('M', 'P', 'G', '4') },
 105     { AV_CODEC_ID_MSMPEG4V1,    MKTAG('M', 'P', '4', '1') },
 106     { AV_CODEC_ID_WMV1,         MKTAG('W', 'M', 'V', '1') },
 107     { AV_CODEC_ID_WMV2,         MKTAG('W', 'M', 'V', '2') },
 108     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 's', 'd') },
 109     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'h', 'd') },
 110     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'h', '1') },
 111     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 's', 'l') },
 112     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', '2', '5') },
 113     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', '5', '0') },
 114     { AV_CODEC_ID_DVVIDEO,      MKTAG('c', 'd', 'v', 'c') }, /* Canopus DV */
 115     { AV_CODEC_ID_DVVIDEO,      MKTAG('C', 'D', 'V', 'H') }, /* Canopus DV */
 116     { AV_CODEC_ID_DVVIDEO,      MKTAG('C', 'D', 'V', '5') }, /* Canopus DV */
 117     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'c', ' ') },
 118     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'c', 's') },
 119     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'h', '1') },
 120     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG('m', 'p', 'g', '1') },
 121     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG('m', 'p', 'g', '2') },
 122     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('m', 'p', 'g', '2') },
 123     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('M', 'P', 'E', 'G') },
 124     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG('P', 'I', 'M', '1') },
 125     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('P', 'I', 'M', '2') },
 126     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG('V', 'C', 'R', '2') },
 127     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG( 1 ,  0 ,  0 ,  16) },
 128     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG( 2 ,  0 ,  0 ,  16) },
 129     { AV_CODEC_ID_MPEG4,        MKTAG( 4 ,  0 ,  0 ,  16) },
 130     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('D', 'V', 'R', ' ') },
 131     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('M', 'M', 'E', 'S') },
 132     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('L', 'M', 'P', '2') }, /* Lead MPEG2 in avi */
 133     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('s', 'l', 'i', 'f') },
 134     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('E', 'M', '2', 'V') },
 135     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('M', '7', '0', '1') }, /* Matrox MPEG2 intra-only */
 136     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('m', 'p', 'g', 'v') },
 137     { AV_CODEC_ID_MJPEG,        MKTAG('M', 'J', 'P', 'G') },
 138     { AV_CODEC_ID_MJPEG,        MKTAG('L', 'J', 'P', 'G') },
 139     { AV_CODEC_ID_MJPEG,        MKTAG('d', 'm', 'b', '1') },
 140     { AV_CODEC_ID_MJPEG,        MKTAG('m', 'j', 'p', 'a') },
 141     { AV_CODEC_ID_LJPEG,        MKTAG('L', 'J', 'P', 'G') },
 142     { AV_CODEC_ID_MJPEG,        MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */
 143     { AV_CODEC_ID_JPEGLS,       MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - encoder */
 144     { AV_CODEC_ID_JPEGLS,       MKTAG('M', 'J', 'P', 'G') },
 145     { AV_CODEC_ID_MJPEG,        MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - decoder */
 146     { AV_CODEC_ID_MJPEG,        MKTAG('j', 'p', 'e', 'g') },
 147     { AV_CODEC_ID_MJPEG,        MKTAG('I', 'J', 'P', 'G') },
 148     { AV_CODEC_ID_MJPEG,        MKTAG('A', 'V', 'R', 'n') },
 149     { AV_CODEC_ID_MJPEG,        MKTAG('A', 'C', 'D', 'V') },
 150     { AV_CODEC_ID_MJPEG,        MKTAG('Q', 'I', 'V', 'G') },
 151     { AV_CODEC_ID_MJPEG,        MKTAG('S', 'L', 'M', 'J') }, /* SL M-JPEG */
 152     { AV_CODEC_ID_MJPEG,        MKTAG('C', 'J', 'P', 'G') }, /* Creative Webcam JPEG */
 153     { AV_CODEC_ID_MJPEG,        MKTAG('I', 'J', 'L', 'V') }, /* Intel JPEG Library Video Codec */
 154     { AV_CODEC_ID_MJPEG,        MKTAG('M', 'V', 'J', 'P') }, /* Midvid JPEG Video Codec */
 155     { AV_CODEC_ID_MJPEG,        MKTAG('A', 'V', 'I', '1') },
 156     { AV_CODEC_ID_MJPEG,        MKTAG('A', 'V', 'I', '2') },
 157     { AV_CODEC_ID_MJPEG,        MKTAG('M', 'T', 'S', 'J') },
 158     { AV_CODEC_ID_MJPEG,        MKTAG('Z', 'J', 'P', 'G') }, /* Paradigm Matrix M-JPEG Codec */
 159     { AV_CODEC_ID_MJPEG,        MKTAG('M', 'M', 'J', 'P') },
 160     { AV_CODEC_ID_HUFFYUV,      MKTAG('H', 'F', 'Y', 'U') },
 161     { AV_CODEC_ID_FFVHUFF,      MKTAG('F', 'F', 'V', 'H') },
 162     { AV_CODEC_ID_CYUV,         MKTAG('C', 'Y', 'U', 'V') },
 163     { AV_CODEC_ID_RAWVIDEO,     MKTAG( 0 ,  0 ,  0 ,  0 ) },
 164     { AV_CODEC_ID_RAWVIDEO,     MKTAG( 3 ,  0 ,  0 ,  0 ) },
 165     { AV_CODEC_ID_RAWVIDEO,     MKTAG('I', '4', '2', '0') },
 166     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'U', 'Y', '2') },
 167     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', '4', '2', '2') },
 168     { AV_CODEC_ID_RAWVIDEO,     MKTAG('V', '4', '2', '2') },
 169     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'U', 'N', 'V') },
 170     { AV_CODEC_ID_RAWVIDEO,     MKTAG('U', 'Y', 'N', 'V') },
 171     { AV_CODEC_ID_RAWVIDEO,     MKTAG('U', 'Y', 'N', 'Y') },
 172     { AV_CODEC_ID_RAWVIDEO,     MKTAG('u', 'y', 'v', '1') },
 173     { AV_CODEC_ID_RAWVIDEO,     MKTAG('2', 'V', 'u', '1') },
 174     { AV_CODEC_ID_RAWVIDEO,     MKTAG('2', 'v', 'u', 'y') },
 175     { AV_CODEC_ID_RAWVIDEO,     MKTAG('y', 'u', 'v', 's') },
 176     { AV_CODEC_ID_RAWVIDEO,     MKTAG('y', 'u', 'v', '2') },
 177     { AV_CODEC_ID_RAWVIDEO,     MKTAG('P', '4', '2', '2') },
 178     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', '1', '2') },
 179     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', '1', '6') },
 180     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', '2', '4') },
 181     { AV_CODEC_ID_RAWVIDEO,     MKTAG('U', 'Y', 'V', 'Y') },
 182     { AV_CODEC_ID_RAWVIDEO,     MKTAG('V', 'Y', 'U', 'Y') },
 183     { AV_CODEC_ID_RAWVIDEO,     MKTAG('I', 'Y', 'U', 'V') },
 184     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', '8', '0', '0') },
 185     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', '8', ' ', ' ') },
 186     { AV_CODEC_ID_RAWVIDEO,     MKTAG('H', 'D', 'Y', 'C') },
 187     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', 'U', '9') },
 188     { AV_CODEC_ID_RAWVIDEO,     MKTAG('V', 'D', 'T', 'Z') }, /* SoftLab-NSK VideoTizer */
 189     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', '4', '1', '1') },
 190     { AV_CODEC_ID_RAWVIDEO,     MKTAG('N', 'V', '1', '2') },
 191     { AV_CODEC_ID_RAWVIDEO,     MKTAG('N', 'V', '2', '1') },
 192     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', '4', '1', 'B') },
 193     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', '4', '2', 'B') },
 194     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'U', 'V', '9') },
 195     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', 'U', '9') },
 196     { AV_CODEC_ID_RAWVIDEO,     MKTAG('a', 'u', 'v', '2') },
 197     { AV_CODEC_ID_FRWU,         MKTAG('F', 'R', 'W', 'U') },
 198     { AV_CODEC_ID_R10K,         MKTAG('R', '1', '0', 'k') },
 199     { AV_CODEC_ID_R210,         MKTAG('r', '2', '1', '0') },
 200     { AV_CODEC_ID_V210,         MKTAG('v', '2', '1', '0') },
 201     { AV_CODEC_ID_V410,         MKTAG('v', '4', '1', '0') },
 202     { AV_CODEC_ID_INDEO3,       MKTAG('I', 'V', '3', '1') },
 203     { AV_CODEC_ID_INDEO3,       MKTAG('I', 'V', '3', '2') },
 204     { AV_CODEC_ID_INDEO4,       MKTAG('I', 'V', '4', '1') },
 205     { AV_CODEC_ID_INDEO5,       MKTAG('I', 'V', '5', '0') },
 206     { AV_CODEC_ID_VP3,          MKTAG('V', 'P', '3', '1') },
 207     { AV_CODEC_ID_VP3,          MKTAG('V', 'P', '3', '0') },
 208     { AV_CODEC_ID_VP5,          MKTAG('V', 'P', '5', '0') },
 209     { AV_CODEC_ID_VP6,          MKTAG('V', 'P', '6', '0') },
 210     { AV_CODEC_ID_VP6,          MKTAG('V', 'P', '6', '1') },
 211     { AV_CODEC_ID_VP6,          MKTAG('V', 'P', '6', '2') },
 212     { AV_CODEC_ID_VP6F,         MKTAG('V', 'P', '6', 'F') },
 213     { AV_CODEC_ID_VP6F,         MKTAG('F', 'L', 'V', '4') },
 214     { AV_CODEC_ID_VP8,          MKTAG('V', 'P', '8', '0') },
 215     { AV_CODEC_ID_ASV1,         MKTAG('A', 'S', 'V', '1') },
 216     { AV_CODEC_ID_ASV2,         MKTAG('A', 'S', 'V', '2') },
 217     { AV_CODEC_ID_VCR1,         MKTAG('V', 'C', 'R', '1') },
 218     { AV_CODEC_ID_FFV1,         MKTAG('F', 'F', 'V', '1') },
 219     { AV_CODEC_ID_XAN_WC4,      MKTAG('X', 'x', 'a', 'n') },
 220     { AV_CODEC_ID_MIMIC,        MKTAG('L', 'M', '2', '0') },
 221     { AV_CODEC_ID_MSRLE,        MKTAG('m', 'r', 'l', 'e') },
 222     { AV_CODEC_ID_MSRLE,        MKTAG( 1 ,  0 ,  0 ,  0 ) },
 223     { AV_CODEC_ID_MSRLE,        MKTAG( 2 ,  0 ,  0 ,  0 ) },
 224     { AV_CODEC_ID_MSVIDEO1,     MKTAG('M', 'S', 'V', 'C') },
 225     { AV_CODEC_ID_MSVIDEO1,     MKTAG('m', 's', 'v', 'c') },
 226     { AV_CODEC_ID_MSVIDEO1,     MKTAG('C', 'R', 'A', 'M') },
 227     { AV_CODEC_ID_MSVIDEO1,     MKTAG('c', 'r', 'a', 'm') },
 228     { AV_CODEC_ID_MSVIDEO1,     MKTAG('W', 'H', 'A', 'M') },
 229     { AV_CODEC_ID_MSVIDEO1,     MKTAG('w', 'h', 'a', 'm') },
 230     { AV_CODEC_ID_CINEPAK,      MKTAG('c', 'v', 'i', 'd') },
 231     { AV_CODEC_ID_TRUEMOTION1,  MKTAG('D', 'U', 'C', 'K') },
 232     { AV_CODEC_ID_TRUEMOTION1,  MKTAG('P', 'V', 'E', 'Z') },
 233     { AV_CODEC_ID_MSZH,         MKTAG('M', 'S', 'Z', 'H') },
 234     { AV_CODEC_ID_ZLIB,         MKTAG('Z', 'L', 'I', 'B') },
 235     { AV_CODEC_ID_4XM,          MKTAG('4', 'X', 'M', 'V') },
 236     { AV_CODEC_ID_FLV1,         MKTAG('F', 'L', 'V', '1') },
 237     { AV_CODEC_ID_FLASHSV,      MKTAG('F', 'S', 'V', '1') },
 238     { AV_CODEC_ID_SVQ1,         MKTAG('s', 'v', 'q', '1') },
 239     { AV_CODEC_ID_TSCC,         MKTAG('t', 's', 'c', 'c') },
 240     { AV_CODEC_ID_ULTI,         MKTAG('U', 'L', 'T', 'I') },
 241     { AV_CODEC_ID_VIXL,         MKTAG('V', 'I', 'X', 'L') },
 242     { AV_CODEC_ID_QPEG,         MKTAG('Q', 'P', 'E', 'G') },
 243     { AV_CODEC_ID_QPEG,         MKTAG('Q', '1', '.', '0') },
 244     { AV_CODEC_ID_QPEG,         MKTAG('Q', '1', '.', '1') },
 245     { AV_CODEC_ID_WMV3,         MKTAG('W', 'M', 'V', '3') },
 246     { AV_CODEC_ID_WMV3IMAGE,    MKTAG('W', 'M', 'V', 'P') },
 247     { AV_CODEC_ID_VC1,          MKTAG('W', 'V', 'C', '1') },
 248     { AV_CODEC_ID_VC1,          MKTAG('W', 'M', 'V', 'A') },
 249     { AV_CODEC_ID_VC1IMAGE,     MKTAG('W', 'V', 'P', '2') },
 250     { AV_CODEC_ID_LOCO,         MKTAG('L', 'O', 'C', 'O') },
 251     { AV_CODEC_ID_WNV1,         MKTAG('W', 'N', 'V', '1') },
 252     { AV_CODEC_ID_AASC,         MKTAG('A', 'A', 'S', 'C') },
 253     { AV_CODEC_ID_INDEO2,       MKTAG('R', 'T', '2', '1') },
 254     { AV_CODEC_ID_FRAPS,        MKTAG('F', 'P', 'S', '1') },
 255     { AV_CODEC_ID_THEORA,       MKTAG('t', 'h', 'e', 'o') },
 256     { AV_CODEC_ID_TRUEMOTION2,  MKTAG('T', 'M', '2', '0') },
 257     { AV_CODEC_ID_CSCD,         MKTAG('C', 'S', 'C', 'D') },
 258     { AV_CODEC_ID_ZMBV,         MKTAG('Z', 'M', 'B', 'V') },
 259     { AV_CODEC_ID_KMVC,         MKTAG('K', 'M', 'V', 'C') },
 260     { AV_CODEC_ID_CAVS,         MKTAG('C', 'A', 'V', 'S') },
 261     { AV_CODEC_ID_JPEG2000,     MKTAG('m', 'j', 'p', '2') },
 262     { AV_CODEC_ID_JPEG2000,     MKTAG('M', 'J', '2', 'C') },
 263     { AV_CODEC_ID_JPEG2000,     MKTAG('L', 'J', '2', 'C') },
 264     { AV_CODEC_ID_JPEG2000,     MKTAG('L', 'J', '2', 'K') },
 265     { AV_CODEC_ID_VMNC,         MKTAG('V', 'M', 'n', 'c') },
 266     { AV_CODEC_ID_TARGA,        MKTAG('t', 'g', 'a', ' ') },
 267     { AV_CODEC_ID_PNG,          MKTAG('M', 'P', 'N', 'G') },
 268     { AV_CODEC_ID_PNG,          MKTAG('P', 'N', 'G', '1') },
 269     { AV_CODEC_ID_CLJR,         MKTAG('C', 'L', 'J', 'R') },
 270     { AV_CODEC_ID_DIRAC,        MKTAG('d', 'r', 'a', 'c') },
 271     { AV_CODEC_ID_RPZA,         MKTAG('a', 'z', 'p', 'r') },
 272     { AV_CODEC_ID_RPZA,         MKTAG('R', 'P', 'Z', 'A') },
 273     { AV_CODEC_ID_RPZA,         MKTAG('r', 'p', 'z', 'a') },
 274     { AV_CODEC_ID_SP5X,         MKTAG('S', 'P', '5', '4') },
 275     { AV_CODEC_ID_AURA,         MKTAG('A', 'U', 'R', 'A') },
 276     { AV_CODEC_ID_AURA2,        MKTAG('A', 'U', 'R', '2') },
 277     { AV_CODEC_ID_DPX,          MKTAG('d', 'p', 'x', ' ') },
 278     { AV_CODEC_ID_KGV1,         MKTAG('K', 'G', 'V', '1') },
 279     { AV_CODEC_ID_LAGARITH,     MKTAG('L', 'A', 'G', 'S') },
 280     { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'R', 'A') },
 281     { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'R', 'G') },
 282     { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'Y', '0') },
 283     { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'Y', '2') },
 284     { AV_CODEC_ID_VBLE,         MKTAG('V', 'B', 'L', 'E') },
 285     { AV_CODEC_ID_DXTORY,       MKTAG('x', 't', 'o', 'r') },
 286     { AV_CODEC_ID_ZEROCODEC,    MKTAG('Z', 'E', 'C', 'O') },
 287     { AV_CODEC_ID_MSS1,         MKTAG('M', 'S', 'S', '1') },
 288     { AV_CODEC_ID_MSA1,         MKTAG('M', 'S', 'A', '1') },
 289     { AV_CODEC_ID_TSCC2,        MKTAG('T', 'S', 'C', '2') },
 290     { AV_CODEC_ID_MTS2,         MKTAG('M', 'T', 'S', '2') },
 291     { AV_CODEC_ID_CLLC,         MKTAG('C', 'L', 'L', 'C') },
 292     { AV_CODEC_ID_MSS2,         MKTAG('M', 'S', 'S', '2') },
 293     { AV_CODEC_ID_SVQ3,         MKTAG('S', 'V', 'Q', '3') },
 294     { AV_CODEC_ID_NONE,         0 }
 295 };
 296
 297 const AVCodecTag ff_codec_wav_tags[] = {
 298     { AV_CODEC_ID_PCM_S16LE,       0x0001 },
 299     { AV_CODEC_ID_PCM_U8,          0x0001 }, /* must come after s16le in this list */
 300     { AV_CODEC_ID_PCM_S24LE,       0x0001 },
 301     { AV_CODEC_ID_PCM_S32LE,       0x0001 },
 302     { AV_CODEC_ID_ADPCM_MS,        0x0002 },
 303     { AV_CODEC_ID_PCM_F32LE,       0x0003 },
 304     { AV_CODEC_ID_PCM_F64LE,       0x0003 }, /* must come after f32le in this list */
 305     { AV_CODEC_ID_PCM_ALAW,        0x0006 },
 306     { AV_CODEC_ID_PCM_MULAW,       0x0007 },
 307     { AV_CODEC_ID_WMAVOICE,        0x000A },
 308     { AV_CODEC_ID_ADPCM_IMA_WAV,   0x0011 },
 309     { AV_CODEC_ID_PCM_ZORK,        0x0011 }, /* must come after adpcm_ima_wav in this list */
 310     { AV_CODEC_ID_ADPCM_YAMAHA,    0x0020 },
 311     { AV_CODEC_ID_TRUESPEECH,      0x0022 },
 312     { AV_CODEC_ID_GSM_MS,          0x0031 },
 313     { AV_CODEC_ID_ADPCM_G726,      0x0045 },
 314     { AV_CODEC_ID_MP2,             0x0050 },
 315     { AV_CODEC_ID_MP3,             0x0055 },
 316     { AV_CODEC_ID_AMR_NB,          0x0057 },
 317     { AV_CODEC_ID_AMR_WB,          0x0058 },
 318     { AV_CODEC_ID_ADPCM_IMA_DK4,   0x0061 },  /* rogue format number */
 319     { AV_CODEC_ID_ADPCM_IMA_DK3,   0x0062 },  /* rogue format number */
 320     { AV_CODEC_ID_ADPCM_IMA_WAV,   0x0069 },
 321     { AV_CODEC_ID_VOXWARE,         0x0075 },
 322     { AV_CODEC_ID_AAC,             0x00ff },
 323     { AV_CODEC_ID_SIPR,            0x0130 },
 324     { AV_CODEC_ID_WMAV1,           0x0160 },
 325     { AV_CODEC_ID_WMAV2,           0x0161 },
 326     { AV_CODEC_ID_WMAPRO,          0x0162 },
 327     { AV_CODEC_ID_WMALOSSLESS,     0x0163 },
 328     { AV_CODEC_ID_ADPCM_CT,        0x0200 },
 329     { AV_CODEC_ID_ATRAC3,          0x0270 },
 330     { AV_CODEC_ID_ADPCM_G722,      0x028F },
 331     { AV_CODEC_ID_IMC,             0x0401 },
 332     { AV_CODEC_ID_IAC,             0x0402 },
 333     { AV_CODEC_ID_GSM_MS,          0x1500 },
 334     { AV_CODEC_ID_TRUESPEECH,      0x1501 },
 335     { AV_CODEC_ID_AAC,             0x1600 }, /* ADTS AAC */
 336     { AV_CODEC_ID_AAC_LATM,        0x1602 },
 337     { AV_CODEC_ID_AC3,             0x2000 },
 338     { AV_CODEC_ID_DTS,             0x2001 },
 339     { AV_CODEC_ID_PCM_MULAW,       0x6c75 },
 340     { AV_CODEC_ID_AAC,             0x706d },
 341     { AV_CODEC_ID_AAC,             0x4143 },
 342     { AV_CODEC_ID_SPEEX,           0xA109 },
 343     { AV_CODEC_ID_FLAC,            0xF1AC },
 344     { AV_CODEC_ID_ADPCM_SWF,       ('S'<<8)+'F' },
 345     { AV_CODEC_ID_VORBIS,          ('V'<<8)+'o' }, //HACK/FIXME, does vorbis in WAV/AVI have an (in)official id?
 346     { AV_CODEC_ID_NONE,      0 },
 347 };
 348
 349 const AVMetadataConv ff_riff_info_conv[] = {
 350     { "IART", "artist"    },
 351     { "ICMT", "comment"   },
 352     { "ICOP", "copyright" },
 353     { "ICRD", "date"      },
 354     { "IGNR", "genre"     },
 355     { "ILNG", "language"  },
 356     { "INAM", "title"     },
 357     { "IPRD", "album"     },
 358     { "IPRT", "track"     },
 359     { "ISFT", "encoder"   },
 360     { "ITCH", "encoded_by"},
 361     { 0 },
 362 };
 363
 364 #if CONFIG_MUXERS
 365 int64_t ff_start_tag(AVIOContext *pb, const char *tag)
 366 {
 367     ffio_wfourcc(pb, tag);
 368     avio_wl32(pb, 0);
 369     return avio_tell(pb);
 370 }
 371
 372 void ff_end_tag(AVIOContext *pb, int64_t start)
 373 {
 374     int64_t pos;
 375
 376     pos = avio_tell(pb);
 377     avio_seek(pb, start - 4, SEEK_SET);
 378     avio_wl32(pb, (uint32_t)(pos - start));
 379     avio_seek(pb, pos, SEEK_SET);
 380 }
 381
 382 /* WAVEFORMATEX header */
 383 /* returns the size or -1 on error */
 384 int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc)
 385 {
 386     int bps, blkalign, bytespersec, frame_size;
 387     int hdrsize = 18;
 388     int waveformatextensible;
 389     uint8_t temp[256];
 390     uint8_t *riff_extradata= temp;
 391     uint8_t *riff_extradata_start= temp;
 392
 393     if(!enc->codec_tag || enc->codec_tag > 0xffff)
 394         return -1;
 395
 396     /* We use the known constant frame size for the codec if known, otherwise
 397        fallback to using AVCodecContext.frame_size, which is not as reliable
 398        for indicating packet duration */
 399     frame_size = av_get_audio_frame_duration(enc, 0);
 400     if (!frame_size)
 401         frame_size = enc->frame_size;
 402
 403     waveformatextensible =   (enc->channels > 2 && enc->channel_layout)
 404                           || enc->sample_rate > 48000
 405                           || av_get_bits_per_sample(enc->codec_id) > 16;
 406
 407     if (waveformatextensible) {
 408         avio_wl16(pb, 0xfffe);
 409     } else {
 410         avio_wl16(pb, enc->codec_tag);
 411     }
 412     avio_wl16(pb, enc->channels);
 413     avio_wl32(pb, enc->sample_rate);
 414     if (enc->codec_id == AV_CODEC_ID_MP2 || enc->codec_id == AV_CODEC_ID_MP3 || enc->codec_id == AV_CODEC_ID_GSM_MS) {
 415         bps = 0;
 416     } else {
 417         if (!(bps = av_get_bits_per_sample(enc->codec_id))) {
 418             if (enc->bits_per_coded_sample)
 419                 bps = enc->bits_per_coded_sample;
 420             else
 421                 bps = 16; // default to 16
 422         }
 423     }
 424     if(bps != enc->bits_per_coded_sample && enc->bits_per_coded_sample){
 425         av_log(enc, AV_LOG_WARNING, "requested bits_per_coded_sample (%d) and actually stored (%d) differ\n", enc->bits_per_coded_sample, bps);
 426     }
 427
 428     if (enc->codec_id == AV_CODEC_ID_MP2 || enc->codec_id == AV_CODEC_ID_MP3) {
 429         /* this is wrong, but it seems many demuxers do not work if this is set
 430            correctly */
 431         blkalign = frame_size;
 432         //blkalign = 144 * enc->bit_rate/enc->sample_rate;
 433     } else if (enc->codec_id == AV_CODEC_ID_AC3) {
 434             blkalign = 3840; //maximum bytes per frame
 435     } else if (enc->block_align != 0) { /* specified by the codec */
 436         blkalign = enc->block_align;
 437     } else
 438         blkalign = bps * enc->channels / av_gcd(8, bps);
 439     if (enc->codec_id == AV_CODEC_ID_PCM_U8 ||
 440         enc->codec_id == AV_CODEC_ID_PCM_S24LE ||
 441         enc->codec_id == AV_CODEC_ID_PCM_S32LE ||
 442         enc->codec_id == AV_CODEC_ID_PCM_F32LE ||
 443         enc->codec_id == AV_CODEC_ID_PCM_F64LE ||
 444         enc->codec_id == AV_CODEC_ID_PCM_S16LE) {
 445         bytespersec = enc->sample_rate * blkalign;
 446     } else {
 447         bytespersec = enc->bit_rate / 8;
 448     }
 449     avio_wl32(pb, bytespersec); /* bytes per second */
 450     avio_wl16(pb, blkalign); /* block align */
 451     avio_wl16(pb, bps); /* bits per sample */
 452     if (enc->codec_id == AV_CODEC_ID_MP3) {
 453         hdrsize += 12;
 454         bytestream_put_le16(&riff_extradata, 1);    /* wID */
 455         bytestream_put_le32(&riff_extradata, 2);    /* fdwFlags */
 456         bytestream_put_le16(&riff_extradata, 1152); /* nBlockSize */
 457         bytestream_put_le16(&riff_extradata, 1);    /* nFramesPerBlock */
 458         bytestream_put_le16(&riff_extradata, 1393); /* nCodecDelay */
 459     } else if (enc->codec_id == AV_CODEC_ID_MP2) {
 460         hdrsize += 22;
 461         bytestream_put_le16(&riff_extradata, 2);                          /* fwHeadLayer */
 462         bytestream_put_le32(&riff_extradata, enc->bit_rate);              /* dwHeadBitrate */
 463         bytestream_put_le16(&riff_extradata, enc->channels == 2 ? 1 : 8); /* fwHeadMode */
 464         bytestream_put_le16(&riff_extradata, 0);                          /* fwHeadModeExt */
 465         bytestream_put_le16(&riff_extradata, 1);                          /* wHeadEmphasis */
 466         bytestream_put_le16(&riff_extradata, 16);                         /* fwHeadFlags */
 467         bytestream_put_le32(&riff_extradata, 0);                          /* dwPTSLow */
 468         bytestream_put_le32(&riff_extradata, 0);                          /* dwPTSHigh */
 469     } else if (enc->codec_id == AV_CODEC_ID_GSM_MS || enc->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {
 470         hdrsize += 2;
 471         bytestream_put_le16(&riff_extradata, frame_size); /* wSamplesPerBlock */
 472     } else if(enc->extradata_size){
 473         riff_extradata_start= enc->extradata;
 474         riff_extradata= enc->extradata + enc->extradata_size;
 475         hdrsize += enc->extradata_size;
 476     }
 477     if(waveformatextensible) {                                    /* write WAVEFORMATEXTENSIBLE extensions */
 478         hdrsize += 22;
 479         avio_wl16(pb, riff_extradata - riff_extradata_start + 22); /* 22 is WAVEFORMATEXTENSIBLE size */
 480         avio_wl16(pb, bps);                                        /* ValidBitsPerSample || SamplesPerBlock || Reserved */
 481         avio_wl32(pb, enc->channel_layout);                        /* dwChannelMask */
 482         avio_wl32(pb, enc->codec_tag);                             /* GUID + next 3 */
 483         avio_wl32(pb, 0x00100000);
 484         avio_wl32(pb, 0xAA000080);
 485         avio_wl32(pb, 0x719B3800);
 486     } else {
 487         avio_wl16(pb, riff_extradata - riff_extradata_start); /* cbSize */
 488     }
 489     avio_write(pb, riff_extradata_start, riff_extradata - riff_extradata_start);
 490     if(hdrsize&1){
 491         hdrsize++;
 492         avio_w8(pb, 0);
 493     }
 494
 495     return hdrsize;
 496 }
 497
 498 /* BITMAPINFOHEADER header */
 499 void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf)
 500 {
 501     avio_wl32(pb, 40 + enc->extradata_size); /* size */
 502     avio_wl32(pb, enc->width);
 503     //We always store RGB TopDown
 504     avio_wl32(pb, enc->codec_tag ? enc->height : -enc->height);
 505     avio_wl16(pb, 1); /* planes */
 506
 507     avio_wl16(pb, enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24); /* depth */
 508     /* compression type */
 509     avio_wl32(pb, enc->codec_tag);
 510     avio_wl32(pb, enc->width * enc->height * 3);
 511     avio_wl32(pb, 0);
 512     avio_wl32(pb, 0);
 513     avio_wl32(pb, 0);
 514     avio_wl32(pb, 0);
 515
 516     avio_write(pb, enc->extradata, enc->extradata_size);
 517
 518     if (!for_asf && enc->extradata_size & 1)
 519         avio_w8(pb, 0);
 520 }
 521
 522 void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale)
 523 {
 524     int gcd;
 525     int audio_frame_size;
 526
 527     /* We use the known constant frame size for the codec if known, otherwise
 528        fallback to using AVCodecContext.frame_size, which is not as reliable
 529        for indicating packet duration */
 530     audio_frame_size = av_get_audio_frame_duration(stream, 0);
 531     if (!audio_frame_size)
 532         audio_frame_size = stream->frame_size;
 533
 534     *au_ssize= stream->block_align;
 535     if (audio_frame_size && stream->sample_rate) {
 536         *au_scale = audio_frame_size;
 537         *au_rate= stream->sample_rate;
 538     }else if(stream->codec_type == AVMEDIA_TYPE_VIDEO ||
 539              stream->codec_type == AVMEDIA_TYPE_DATA ||
 540              stream->codec_type == AVMEDIA_TYPE_SUBTITLE){
 541         *au_scale= stream->time_base.num;
 542         *au_rate = stream->time_base.den;
 543     }else{
 544         *au_scale= stream->block_align ? stream->block_align*8 : 8;
 545         *au_rate = stream->bit_rate ? stream->bit_rate : 8*stream->sample_rate;
 546     }
 547     gcd= av_gcd(*au_scale, *au_rate);
 548     *au_scale /= gcd;
 549     *au_rate /= gcd;
 550 }
 551
 552 void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str)
 553 {
 554     int len = strlen(str);
 555     if (len > 0) {
 556         len++;
 557         ffio_wfourcc(pb, tag);
 558         avio_wl32(pb, len);
 559         avio_put_str(pb, str);
 560         if (len & 1)
 561             avio_w8(pb, 0);
 562     }
 563 }
 564
 565 static const char riff_tags[][5] = {
 566     "IARL", "IART", "ICMS", "ICMT", "ICOP", "ICRD", "ICRP", "IDIM", "IDPI",
 567     "IENG", "IGNR", "IKEY", "ILGT", "ILNG", "IMED", "INAM", "IPLT", "IPRD",
 568     "IPRT", "ISBJ", "ISFT", "ISHP", "ISRC", "ISRF", "ITCH",
 569     {0}
 570 };
 571
 572 static int riff_has_valid_tags(AVFormatContext *s)
 573 {
 574     int i;
 575
 576     for (i = 0; *riff_tags[i]; i++) {
 577         if (av_dict_get(s->metadata, riff_tags[i], NULL, AV_DICT_MATCH_CASE))
 578             return 1;
 579     }
 580
 581     return 0;
 582 }
 583
 584 void ff_riff_write_info(AVFormatContext *s)
 585 {
 586     AVIOContext *pb = s->pb;
 587     int i;
 588     int64_t list_pos;
 589     AVDictionaryEntry *t = NULL;
 590
 591     ff_metadata_conv(&s->metadata, ff_riff_info_conv, NULL);
 592
 593     /* writing empty LIST is not nice and may cause problems */
 594     if (!riff_has_valid_tags(s))
 595         return;
 596
 597     list_pos = ff_start_tag(pb, "LIST");
 598     ffio_wfourcc(pb, "INFO");
 599     for (i = 0; *riff_tags[i]; i++) {
 600         if ((t = av_dict_get(s->metadata, riff_tags[i], NULL, AV_DICT_MATCH_CASE)))
 601             ff_riff_write_info_tag(s->pb, t->key, t->value);
 602     }
 603     ff_end_tag(pb, list_pos);
 604 }
 605 #endif //CONFIG_MUXERS
 606
 607 #if CONFIG_DEMUXERS
 608 /* We could be given one of the three possible structures here:
 609  * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
 610  * is an expansion of the previous one with the fields added
 611  * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
 612  * WAVEFORMATEX adds 'WORD  cbSize' and basically makes itself
 613  * an openended structure.
 614  */
 615 int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
 616 {
 617     int id;
 618
 619     id = avio_rl16(pb);
 620     codec->codec_type = AVMEDIA_TYPE_AUDIO;
 621     codec->codec_tag = id;
 622     codec->channels = avio_rl16(pb);
 623     codec->sample_rate = avio_rl32(pb);
 624     codec->bit_rate = avio_rl32(pb) * 8;
 625     codec->block_align = avio_rl16(pb);
 626     if (size == 14) {  /* We're dealing with plain vanilla WAVEFORMAT */
 627         codec->bits_per_coded_sample = 8;
 628     }else
 629         codec->bits_per_coded_sample = avio_rl16(pb);
 630     if (size >= 18) {  /* We're obviously dealing with WAVEFORMATEX */
 631         int cbSize = avio_rl16(pb); /* cbSize */
 632         size -= 18;
 633         cbSize = FFMIN(size, cbSize);
 634         if (cbSize >= 22 && id == 0xfffe) { /* WAVEFORMATEXTENSIBLE */
 635             codec->bits_per_coded_sample = avio_rl16(pb);
 636             codec->channel_layout = avio_rl32(pb); /* dwChannelMask */
 637             id = avio_rl32(pb); /* 4 first bytes of GUID */
 638             avio_skip(pb, 12); /* skip end of GUID */
 639             cbSize -= 22;
 640             size -= 22;
 641         }
 642         codec->extradata_size = cbSize;
 643         if (cbSize > 0) {
 644             av_free(codec->extradata);
 645             codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
 646             if (!codec->extradata)
 647                 return AVERROR(ENOMEM);
 648             avio_read(pb, codec->extradata, codec->extradata_size);
 649             size -= cbSize;
 650         }
 651
 652         /* It is possible for the chunk to contain garbage at the end */
 653         if (size > 0)
 654             avio_skip(pb, size);
 655     }
 656     codec->codec_id = ff_wav_codec_get_id(id, codec->bits_per_coded_sample);
 657     if (codec->codec_id == AV_CODEC_ID_AAC_LATM) {
 658         /* channels and sample_rate values are those prior to applying SBR and/or PS */
 659         codec->channels    = 0;
 660         codec->sample_rate = 0;
 661     }
 662     /* override bits_per_coded_sample for G.726 */
 663     if (codec->codec_id == AV_CODEC_ID_ADPCM_G726)
 664         codec->bits_per_coded_sample = codec->bit_rate / codec->sample_rate;
 665
 666     return 0;
 667 }
 668
 669
 670 enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
 671 {
 672     enum AVCodecID id;
 673     id = ff_codec_get_id(ff_codec_wav_tags, tag);
 674     if (id <= 0)
 675         return id;
 676
 677     if (id == AV_CODEC_ID_PCM_S16LE)
 678         id = ff_get_pcm_codec_id(bps, 0, 0, ~1);
 679     else if (id == AV_CODEC_ID_PCM_F32LE)
 680         id = ff_get_pcm_codec_id(bps, 1, 0, 0);
 681
 682     if (id == AV_CODEC_ID_ADPCM_IMA_WAV && bps == 8)
 683         id = AV_CODEC_ID_PCM_ZORK;
 684     return id;
 685 }
 686
 687 int ff_get_bmp_header(AVIOContext *pb, AVStream *st)
 688 {
 689     int tag1;
 690     avio_rl32(pb); /* size */
 691     st->codec->width = avio_rl32(pb);
 692     st->codec->height = (int32_t)avio_rl32(pb);
 693     avio_rl16(pb); /* planes */
 694     st->codec->bits_per_coded_sample= avio_rl16(pb); /* depth */
 695     tag1 = avio_rl32(pb);
 696     avio_rl32(pb); /* ImageSize */
 697     avio_rl32(pb); /* XPelsPerMeter */
 698     avio_rl32(pb); /* YPelsPerMeter */
 699     avio_rl32(pb); /* ClrUsed */
 700     avio_rl32(pb); /* ClrImportant */
 701     return tag1;
 702 }
 703
 704 int ff_read_riff_info(AVFormatContext *s, int64_t size)
 705 {
 706     int64_t start, end, cur;
 707     AVIOContext *pb = s->pb;
 708
 709     start = avio_tell(pb);
 710     end = start + size;
 711
 712     while ((cur = avio_tell(pb)) >= 0 && cur <= end - 8 /* = tag + size */) {
 713         uint32_t chunk_code;
 714         int64_t chunk_size;
 715         char key[5] = {0};
 716         char *value;
 717
 718         chunk_code = avio_rl32(pb);
 719         chunk_size = avio_rl32(pb);
 720
 721         if (chunk_size > end || end - chunk_size < cur || chunk_size == UINT_MAX) {
 722             av_log(s, AV_LOG_WARNING, "too big INFO subchunk\n");
 723             break;
 724         }
 725
 726         chunk_size += (chunk_size & 1);
 727
 728         if (!chunk_code) {
 729             if (chunk_size)
 730                 avio_skip(pb, chunk_size);
 731             continue;
 732         }
 733
 734         value = av_malloc(chunk_size + 1);
 735         if (!value) {
 736             av_log(s, AV_LOG_ERROR, "out of memory, unable to read INFO tag\n");
 737             return AVERROR(ENOMEM);
 738         }
 739
 740         AV_WL32(key, chunk_code);
 741
 742         if (avio_read(pb, value, chunk_size) != chunk_size) {
 743             av_free(value);
 744             av_log(s, AV_LOG_WARNING, "premature end of file while reading INFO tag\n");
 745             break;
 746         }
 747
 748         value[chunk_size] = 0;
 749
 750         av_dict_set(&s->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
 751     }
 752
 753     return 0;
 754 }
 755 #endif // CONFIG_DEMUXERS