FFmpeg: libavformat/riff.c Source File

00001 /*
00002  * RIFF codec tags
00003  * Copyright (c) 2000 Fabrice Bellard
00004  *
00005  * This file is part of FFmpeg.
00006  *
00007  * FFmpeg is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * FFmpeg is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with FFmpeg; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00022 #include "libavutil/mathematics.h"
00023 #include "libavcodec/avcodec.h"
00024 #include "avformat.h"
00025 #include "avio_internal.h"
00026 #include "riff.h"
00027 #include "libavcodec/bytestream.h"
00028 #include "libavutil/avassert.h"
00029 
00030 /* Note: when encoding, the first matching tag is used, so order is
00031    important if multiple tags possible for a given codec.
00032    Note also that this list is used for more than just riff, other
00033    files use it as well.
00034 */
00035 const AVCodecTag ff_codec_bmp_tags[] = {
00036     { AV_CODEC_ID_H264,         MKTAG('H', '2', '6', '4') },
00037     { AV_CODEC_ID_H264,         MKTAG('h', '2', '6', '4') },
00038     { AV_CODEC_ID_H264,         MKTAG('X', '2', '6', '4') },
00039     { AV_CODEC_ID_H264,         MKTAG('x', '2', '6', '4') },
00040     { AV_CODEC_ID_H264,         MKTAG('a', 'v', 'c', '1') },
00041     { AV_CODEC_ID_H264,         MKTAG('D', 'A', 'V', 'C') },
00042     { AV_CODEC_ID_H264,         MKTAG('V', 'S', 'S', 'H') },
00043     { AV_CODEC_ID_H264,         MKTAG('Q', '2', '6', '4') }, /* QNAP surveillance system */
00044     { AV_CODEC_ID_H263,         MKTAG('H', '2', '6', '3') },
00045     { AV_CODEC_ID_H263,         MKTAG('X', '2', '6', '3') },
00046     { AV_CODEC_ID_H263,         MKTAG('T', '2', '6', '3') },
00047     { AV_CODEC_ID_H263,         MKTAG('L', '2', '6', '3') },
00048     { AV_CODEC_ID_H263,         MKTAG('V', 'X', '1', 'K') },
00049     { AV_CODEC_ID_H263,         MKTAG('Z', 'y', 'G', 'o') },
00050     { AV_CODEC_ID_H263,         MKTAG('M', '2', '6', '3') },
00051     { AV_CODEC_ID_H263P,        MKTAG('H', '2', '6', '3') },
00052     { AV_CODEC_ID_H263I,        MKTAG('I', '2', '6', '3') }, /* intel h263 */
00053     { AV_CODEC_ID_H261,         MKTAG('H', '2', '6', '1') },
00054     { AV_CODEC_ID_H263,         MKTAG('U', '2', '6', '3') },
00055     { AV_CODEC_ID_MPEG4,        MKTAG('F', 'M', 'P', '4') },
00056     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'I', 'V', 'X') },
00057     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'X', '5', '0') },
00058     { AV_CODEC_ID_MPEG4,        MKTAG('X', 'V', 'I', 'D') },
00059     { AV_CODEC_ID_MPEG4,        MKTAG('M', 'P', '4', 'S') },
00060     { AV_CODEC_ID_MPEG4,        MKTAG('M', '4', 'S', '2') },
00061     { AV_CODEC_ID_MPEG4,        MKTAG( 4 ,  0 ,  0 ,  0 ) }, /* some broken avi use this */
00062     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'I', 'V', '1') },
00063     { AV_CODEC_ID_MPEG4,        MKTAG('B', 'L', 'Z', '0') },
00064     { AV_CODEC_ID_MPEG4,        MKTAG('m', 'p', '4', 'v') },
00065     { AV_CODEC_ID_MPEG4,        MKTAG('U', 'M', 'P', '4') },
00066     { AV_CODEC_ID_MPEG4,        MKTAG('W', 'V', '1', 'F') },
00067     { AV_CODEC_ID_MPEG4,        MKTAG('S', 'E', 'D', 'G') },
00068     { AV_CODEC_ID_MPEG4,        MKTAG('R', 'M', 'P', '4') },
00069     { AV_CODEC_ID_MPEG4,        MKTAG('3', 'I', 'V', '2') },
00070     { AV_CODEC_ID_MPEG4,        MKTAG('W', 'A', 'W', 'V') }, /* WaWv MPEG-4 Video Codec */
00071     { AV_CODEC_ID_MPEG4,        MKTAG('F', 'F', 'D', 'S') },
00072     { AV_CODEC_ID_MPEG4,        MKTAG('F', 'V', 'F', 'W') },
00073     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'C', 'O', 'D') },
00074     { AV_CODEC_ID_MPEG4,        MKTAG('M', 'V', 'X', 'M') },
00075     { AV_CODEC_ID_MPEG4,        MKTAG('P', 'M', '4', 'V') },
00076     { AV_CODEC_ID_MPEG4,        MKTAG('S', 'M', 'P', '4') },
00077     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'X', 'G', 'M') },
00078     { AV_CODEC_ID_MPEG4,        MKTAG('V', 'I', 'D', 'M') },
00079     { AV_CODEC_ID_MPEG4,        MKTAG('M', '4', 'T', '3') },
00080     { AV_CODEC_ID_MPEG4,        MKTAG('G', 'E', 'O', 'X') },
00081     { AV_CODEC_ID_MPEG4,        MKTAG('H', 'D', 'X', '4') }, /* flipped video */
00082     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'M', 'K', '2') },
00083     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'I', 'G', 'I') },
00084     { AV_CODEC_ID_MPEG4,        MKTAG('I', 'N', 'M', 'C') },
00085     { AV_CODEC_ID_MPEG4,        MKTAG('E', 'P', 'H', 'V') }, /* Ephv MPEG-4 */
00086     { AV_CODEC_ID_MPEG4,        MKTAG('E', 'M', '4', 'A') },
00087     { AV_CODEC_ID_MPEG4,        MKTAG('M', '4', 'C', 'C') }, /* Divio MPEG-4 */
00088     { AV_CODEC_ID_MPEG4,        MKTAG('S', 'N', '4', '0') },
00089     { AV_CODEC_ID_MPEG4,        MKTAG('V', 'S', 'P', 'X') },
00090     { AV_CODEC_ID_MPEG4,        MKTAG('U', 'L', 'D', 'X') },
00091     { AV_CODEC_ID_MPEG4,        MKTAG('G', 'E', 'O', 'V') },
00092     { AV_CODEC_ID_MPEG4,        MKTAG('S', 'I', 'P', 'P') }, /* Samsung SHR-6040 */
00093     { AV_CODEC_ID_MPEG4,        MKTAG('S', 'M', '4', 'V') },
00094     { AV_CODEC_ID_MPEG4,        MKTAG('X', 'V', 'I', 'X') },
00095     { AV_CODEC_ID_MPEG4,        MKTAG('D', 'r', 'e', 'X') },
00096     { AV_CODEC_ID_MPEG4,        MKTAG('Q', 'M', 'P', '4') }, /* QNAP Systems */
00097     { AV_CODEC_ID_MPEG4,        MKTAG('P', 'L', 'V', '1') }, /* Pelco DVR MPEG-4 */
00098     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('M', 'P', '4', '3') },
00099     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '3') },
00100     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('M', 'P', 'G', '3') },
00101     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '5') },
00102     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '6') },
00103     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('D', 'I', 'V', '4') },
00104     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('D', 'V', 'X', '3') },
00105     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('A', 'P', '4', '1') },
00106     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('C', 'O', 'L', '1') },
00107     { AV_CODEC_ID_MSMPEG4V3,    MKTAG('C', 'O', 'L', '0') },
00108     { AV_CODEC_ID_MSMPEG4V2,    MKTAG('M', 'P', '4', '2') },
00109     { AV_CODEC_ID_MSMPEG4V2,    MKTAG('D', 'I', 'V', '2') },
00110     { AV_CODEC_ID_MSMPEG4V1,    MKTAG('M', 'P', 'G', '4') },
00111     { AV_CODEC_ID_MSMPEG4V1,    MKTAG('M', 'P', '4', '1') },
00112     { AV_CODEC_ID_WMV1,         MKTAG('W', 'M', 'V', '1') },
00113     { AV_CODEC_ID_WMV2,         MKTAG('W', 'M', 'V', '2') },
00114     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 's', 'd') },
00115     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'h', 'd') },
00116     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'h', '1') },
00117     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 's', 'l') },
00118     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', '2', '5') },
00119     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', '5', '0') },
00120     { AV_CODEC_ID_DVVIDEO,      MKTAG('c', 'd', 'v', 'c') }, /* Canopus DV */
00121     { AV_CODEC_ID_DVVIDEO,      MKTAG('C', 'D', 'V', 'H') }, /* Canopus DV */
00122     { AV_CODEC_ID_DVVIDEO,      MKTAG('C', 'D', 'V', '5') }, /* Canopus DV */
00123     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'c', ' ') },
00124     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'c', 's') },
00125     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'h', '1') },
00126     { AV_CODEC_ID_DVVIDEO,      MKTAG('d', 'v', 'i', 's') },
00127     { AV_CODEC_ID_DVVIDEO,      MKTAG('p', 'd', 'v', 'c') },
00128     { AV_CODEC_ID_DVVIDEO,      MKTAG('S', 'L', '2', '5') },
00129     { AV_CODEC_ID_DVVIDEO,      MKTAG('S', 'L', 'D', 'V') },
00130     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG('m', 'p', 'g', '1') },
00131     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG('m', 'p', 'g', '2') },
00132     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('m', 'p', 'g', '2') },
00133     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('M', 'P', 'E', 'G') },
00134     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG('P', 'I', 'M', '1') },
00135     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('P', 'I', 'M', '2') },
00136     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG('V', 'C', 'R', '2') },
00137     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG( 1 ,  0 ,  0 ,  16) },
00138     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG( 2 ,  0 ,  0 ,  16) },
00139     { AV_CODEC_ID_MPEG4,        MKTAG( 4 ,  0 ,  0 ,  16) },
00140     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('D', 'V', 'R', ' ') },
00141     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('M', 'M', 'E', 'S') },
00142     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('L', 'M', 'P', '2') }, /* Lead MPEG2 in avi */
00143     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('s', 'l', 'i', 'f') },
00144     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('E', 'M', '2', 'V') },
00145     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('M', '7', '0', '1') }, /* Matrox MPEG2 intra-only */
00146     { AV_CODEC_ID_MPEG2VIDEO,   MKTAG('m', 'p', 'g', 'v') },
00147     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG('B', 'W', '1', '0') },
00148     { AV_CODEC_ID_MPEG1VIDEO,   MKTAG('X', 'M', 'P', 'G') }, /* Xing MPEG intra only */
00149     { AV_CODEC_ID_MJPEG,        MKTAG('M', 'J', 'P', 'G') },
00150     { AV_CODEC_ID_MJPEG,        MKTAG('L', 'J', 'P', 'G') },
00151     { AV_CODEC_ID_MJPEG,        MKTAG('d', 'm', 'b', '1') },
00152     { AV_CODEC_ID_MJPEG,        MKTAG('m', 'j', 'p', 'a') },
00153     { AV_CODEC_ID_LJPEG,        MKTAG('L', 'J', 'P', 'G') },
00154     { AV_CODEC_ID_MJPEG,        MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */
00155     { AV_CODEC_ID_JPEGLS,       MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - encoder */
00156     { AV_CODEC_ID_JPEGLS,       MKTAG('M', 'J', 'P', 'G') },
00157     { AV_CODEC_ID_MJPEG,        MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - decoder */
00158     { AV_CODEC_ID_MJPEG,        MKTAG('j', 'p', 'e', 'g') },
00159     { AV_CODEC_ID_MJPEG,        MKTAG('I', 'J', 'P', 'G') },
00160     { AV_CODEC_ID_AVRN,         MKTAG('A', 'V', 'R', 'n') },
00161     { AV_CODEC_ID_MJPEG,        MKTAG('A', 'C', 'D', 'V') },
00162     { AV_CODEC_ID_MJPEG,        MKTAG('Q', 'I', 'V', 'G') },
00163     { AV_CODEC_ID_MJPEG,        MKTAG('S', 'L', 'M', 'J') }, /* SL M-JPEG */
00164     { AV_CODEC_ID_MJPEG,        MKTAG('C', 'J', 'P', 'G') }, /* Creative Webcam JPEG */
00165     { AV_CODEC_ID_MJPEG,        MKTAG('I', 'J', 'L', 'V') }, /* Intel JPEG Library Video Codec */
00166     { AV_CODEC_ID_MJPEG,        MKTAG('M', 'V', 'J', 'P') }, /* Midvid JPEG Video Codec */
00167     { AV_CODEC_ID_MJPEG,        MKTAG('A', 'V', 'I', '1') },
00168     { AV_CODEC_ID_MJPEG,        MKTAG('A', 'V', 'I', '2') },
00169     { AV_CODEC_ID_MJPEG,        MKTAG('M', 'T', 'S', 'J') },
00170     { AV_CODEC_ID_MJPEG,        MKTAG('Z', 'J', 'P', 'G') }, /* Paradigm Matrix M-JPEG Codec */
00171     { AV_CODEC_ID_MJPEG,        MKTAG('M', 'M', 'J', 'P') },
00172     { AV_CODEC_ID_HUFFYUV,      MKTAG('H', 'F', 'Y', 'U') },
00173     { AV_CODEC_ID_FFVHUFF,      MKTAG('F', 'F', 'V', 'H') },
00174     { AV_CODEC_ID_CYUV,         MKTAG('C', 'Y', 'U', 'V') },
00175     { AV_CODEC_ID_RAWVIDEO,     MKTAG( 0 ,  0 ,  0 ,  0 ) },
00176     { AV_CODEC_ID_RAWVIDEO,     MKTAG( 3 ,  0 ,  0 ,  0 ) },
00177     { AV_CODEC_ID_RAWVIDEO,     MKTAG('I', '4', '2', '0') },
00178     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'U', 'Y', '2') },
00179     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', '4', '2', '2') },
00180     { AV_CODEC_ID_RAWVIDEO,     MKTAG('V', '4', '2', '2') },
00181     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'U', 'N', 'V') },
00182     { AV_CODEC_ID_RAWVIDEO,     MKTAG('U', 'Y', 'N', 'V') },
00183     { AV_CODEC_ID_RAWVIDEO,     MKTAG('U', 'Y', 'N', 'Y') },
00184     { AV_CODEC_ID_RAWVIDEO,     MKTAG('u', 'y', 'v', '1') },
00185     { AV_CODEC_ID_RAWVIDEO,     MKTAG('2', 'V', 'u', '1') },
00186     { AV_CODEC_ID_RAWVIDEO,     MKTAG('2', 'v', 'u', 'y') },
00187     { AV_CODEC_ID_RAWVIDEO,     MKTAG('y', 'u', 'v', 's') },
00188     { AV_CODEC_ID_RAWVIDEO,     MKTAG('y', 'u', 'v', '2') },
00189     { AV_CODEC_ID_RAWVIDEO,     MKTAG('P', '4', '2', '2') },
00190     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', '1', '2') },
00191     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', '1', '6') },
00192     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', '2', '4') },
00193     { AV_CODEC_ID_RAWVIDEO,     MKTAG('U', 'Y', 'V', 'Y') },
00194     { AV_CODEC_ID_RAWVIDEO,     MKTAG('V', 'Y', 'U', 'Y') },
00195     { AV_CODEC_ID_RAWVIDEO,     MKTAG('I', 'Y', 'U', 'V') },
00196     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', '8', '0', '0') },
00197     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', '8', ' ', ' ') },
00198     { AV_CODEC_ID_RAWVIDEO,     MKTAG('H', 'D', 'Y', 'C') },
00199     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', 'U', '9') },
00200     { AV_CODEC_ID_RAWVIDEO,     MKTAG('V', 'D', 'T', 'Z') }, /* SoftLab-NSK VideoTizer */
00201     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', '4', '1', '1') },
00202     { AV_CODEC_ID_RAWVIDEO,     MKTAG('N', 'V', '1', '2') },
00203     { AV_CODEC_ID_RAWVIDEO,     MKTAG('N', 'V', '2', '1') },
00204     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', '4', '1', 'B') },
00205     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', '4', '2', 'B') },
00206     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'U', 'V', '9') },
00207     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', 'U', '9') },
00208     { AV_CODEC_ID_RAWVIDEO,     MKTAG('a', 'u', 'v', '2') },
00209     { AV_CODEC_ID_RAWVIDEO,     MKTAG('Y', 'V', 'Y', 'U') },
00210     { AV_CODEC_ID_FRWU,         MKTAG('F', 'R', 'W', 'U') },
00211     { AV_CODEC_ID_R10K,         MKTAG('R', '1', '0', 'k') },
00212     { AV_CODEC_ID_R210,         MKTAG('r', '2', '1', '0') },
00213     { AV_CODEC_ID_V210,         MKTAG('v', '2', '1', '0') },
00214     { AV_CODEC_ID_V308,         MKTAG('v', '3', '0', '8') },
00215     { AV_CODEC_ID_V408,         MKTAG('v', '4', '0', '8') },
00216     { AV_CODEC_ID_AYUV,         MKTAG('A', 'Y', 'U', 'V') },
00217     { AV_CODEC_ID_V410,         MKTAG('v', '4', '1', '0') },
00218     { AV_CODEC_ID_YUV4,         MKTAG('y', 'u', 'v', '4') },
00219     { AV_CODEC_ID_INDEO3,       MKTAG('I', 'V', '3', '1') },
00220     { AV_CODEC_ID_INDEO3,       MKTAG('I', 'V', '3', '2') },
00221     { AV_CODEC_ID_INDEO4,       MKTAG('I', 'V', '4', '1') },
00222     { AV_CODEC_ID_INDEO5,       MKTAG('I', 'V', '5', '0') },
00223     { AV_CODEC_ID_VP3,          MKTAG('V', 'P', '3', '1') },
00224     { AV_CODEC_ID_VP3,          MKTAG('V', 'P', '3', '0') },
00225     { AV_CODEC_ID_VP5,          MKTAG('V', 'P', '5', '0') },
00226     { AV_CODEC_ID_VP6,          MKTAG('V', 'P', '6', '0') },
00227     { AV_CODEC_ID_VP6,          MKTAG('V', 'P', '6', '1') },
00228     { AV_CODEC_ID_VP6,          MKTAG('V', 'P', '6', '2') },
00229     { AV_CODEC_ID_VP6F,         MKTAG('V', 'P', '6', 'F') },
00230     { AV_CODEC_ID_VP6F,         MKTAG('F', 'L', 'V', '4') },
00231     { AV_CODEC_ID_VP8,          MKTAG('V', 'P', '8', '0') },
00232     { AV_CODEC_ID_ASV1,         MKTAG('A', 'S', 'V', '1') },
00233     { AV_CODEC_ID_ASV2,         MKTAG('A', 'S', 'V', '2') },
00234     { AV_CODEC_ID_VCR1,         MKTAG('V', 'C', 'R', '1') },
00235     { AV_CODEC_ID_FFV1,         MKTAG('F', 'F', 'V', '1') },
00236     { AV_CODEC_ID_XAN_WC4,      MKTAG('X', 'x', 'a', 'n') },
00237     { AV_CODEC_ID_MIMIC,        MKTAG('L', 'M', '2', '0') },
00238     { AV_CODEC_ID_MSRLE,        MKTAG('m', 'r', 'l', 'e') },
00239     { AV_CODEC_ID_MSRLE,        MKTAG( 1 ,  0 ,  0 ,  0 ) },
00240     { AV_CODEC_ID_MSRLE,        MKTAG( 2 ,  0 ,  0 ,  0 ) },
00241     { AV_CODEC_ID_MSVIDEO1,     MKTAG('M', 'S', 'V', 'C') },
00242     { AV_CODEC_ID_MSVIDEO1,     MKTAG('m', 's', 'v', 'c') },
00243     { AV_CODEC_ID_MSVIDEO1,     MKTAG('C', 'R', 'A', 'M') },
00244     { AV_CODEC_ID_MSVIDEO1,     MKTAG('c', 'r', 'a', 'm') },
00245     { AV_CODEC_ID_MSVIDEO1,     MKTAG('W', 'H', 'A', 'M') },
00246     { AV_CODEC_ID_MSVIDEO1,     MKTAG('w', 'h', 'a', 'm') },
00247     { AV_CODEC_ID_CINEPAK,      MKTAG('c', 'v', 'i', 'd') },
00248     { AV_CODEC_ID_TRUEMOTION1,  MKTAG('D', 'U', 'C', 'K') },
00249     { AV_CODEC_ID_TRUEMOTION1,  MKTAG('P', 'V', 'E', 'Z') },
00250     { AV_CODEC_ID_MSZH,         MKTAG('M', 'S', 'Z', 'H') },
00251     { AV_CODEC_ID_ZLIB,         MKTAG('Z', 'L', 'I', 'B') },
00252     { AV_CODEC_ID_SNOW,         MKTAG('S', 'N', 'O', 'W') },
00253     { AV_CODEC_ID_4XM,          MKTAG('4', 'X', 'M', 'V') },
00254     { AV_CODEC_ID_FLV1,         MKTAG('F', 'L', 'V', '1') },
00255     { AV_CODEC_ID_FLV1,         MKTAG('S', '2', '6', '3') },
00256     { AV_CODEC_ID_FLASHSV,      MKTAG('F', 'S', 'V', '1') },
00257     { AV_CODEC_ID_SVQ1,         MKTAG('s', 'v', 'q', '1') },
00258     { AV_CODEC_ID_TSCC,         MKTAG('t', 's', 'c', 'c') },
00259     { AV_CODEC_ID_ULTI,         MKTAG('U', 'L', 'T', 'I') },
00260     { AV_CODEC_ID_VIXL,         MKTAG('V', 'I', 'X', 'L') },
00261     { AV_CODEC_ID_QPEG,         MKTAG('Q', 'P', 'E', 'G') },
00262     { AV_CODEC_ID_QPEG,         MKTAG('Q', '1', '.', '0') },
00263     { AV_CODEC_ID_QPEG,         MKTAG('Q', '1', '.', '1') },
00264     { AV_CODEC_ID_WMV3,         MKTAG('W', 'M', 'V', '3') },
00265     { AV_CODEC_ID_WMV3IMAGE,    MKTAG('W', 'M', 'V', 'P') },
00266     { AV_CODEC_ID_VC1,          MKTAG('W', 'V', 'C', '1') },
00267     { AV_CODEC_ID_VC1,          MKTAG('W', 'M', 'V', 'A') },
00268     { AV_CODEC_ID_VC1IMAGE,     MKTAG('W', 'V', 'P', '2') },
00269     { AV_CODEC_ID_LOCO,         MKTAG('L', 'O', 'C', 'O') },
00270     { AV_CODEC_ID_WNV1,         MKTAG('W', 'N', 'V', '1') },
00271     { AV_CODEC_ID_WNV1,         MKTAG('Y', 'U', 'V', '8') },
00272     { AV_CODEC_ID_AASC,         MKTAG('A', 'A', 'S', '4') },
00273     { AV_CODEC_ID_AASC,         MKTAG('A', 'A', 'S', 'C') },
00274     { AV_CODEC_ID_INDEO2,       MKTAG('R', 'T', '2', '1') },
00275     { AV_CODEC_ID_FRAPS,        MKTAG('F', 'P', 'S', '1') },
00276     { AV_CODEC_ID_THEORA,       MKTAG('t', 'h', 'e', 'o') },
00277     { AV_CODEC_ID_TRUEMOTION2,  MKTAG('T', 'M', '2', '0') },
00278     { AV_CODEC_ID_CSCD,         MKTAG('C', 'S', 'C', 'D') },
00279     { AV_CODEC_ID_ZMBV,         MKTAG('Z', 'M', 'B', 'V') },
00280     { AV_CODEC_ID_KMVC,         MKTAG('K', 'M', 'V', 'C') },
00281     { AV_CODEC_ID_CAVS,         MKTAG('C', 'A', 'V', 'S') },
00282     { AV_CODEC_ID_JPEG2000,     MKTAG('m', 'j', 'p', '2') },
00283     { AV_CODEC_ID_JPEG2000,     MKTAG('M', 'J', '2', 'C') },
00284     { AV_CODEC_ID_JPEG2000,     MKTAG('L', 'J', '2', 'C') },
00285     { AV_CODEC_ID_JPEG2000,     MKTAG('L', 'J', '2', 'K') },
00286     { AV_CODEC_ID_JPEG2000,     MKTAG('I', 'P', 'J', '2') },
00287     { AV_CODEC_ID_VMNC,         MKTAG('V', 'M', 'n', 'c') },
00288     { AV_CODEC_ID_TARGA,        MKTAG('t', 'g', 'a', ' ') },
00289     { AV_CODEC_ID_PNG,          MKTAG('M', 'P', 'N', 'G') },
00290     { AV_CODEC_ID_PNG,          MKTAG('P', 'N', 'G', '1') },
00291     { AV_CODEC_ID_CLJR,         MKTAG('C', 'L', 'J', 'R') },
00292     { AV_CODEC_ID_DIRAC,        MKTAG('d', 'r', 'a', 'c') },
00293     { AV_CODEC_ID_RPZA,         MKTAG('a', 'z', 'p', 'r') },
00294     { AV_CODEC_ID_RPZA,         MKTAG('R', 'P', 'Z', 'A') },
00295     { AV_CODEC_ID_RPZA,         MKTAG('r', 'p', 'z', 'a') },
00296     { AV_CODEC_ID_SP5X,         MKTAG('S', 'P', '5', '4') },
00297     { AV_CODEC_ID_AURA,         MKTAG('A', 'U', 'R', 'A') },
00298     { AV_CODEC_ID_AURA2,        MKTAG('A', 'U', 'R', '2') },
00299     { AV_CODEC_ID_DPX,          MKTAG('d', 'p', 'x', ' ') },
00300     { AV_CODEC_ID_KGV1,         MKTAG('K', 'G', 'V', '1') },
00301     { AV_CODEC_ID_LAGARITH,     MKTAG('L', 'A', 'G', 'S') },
00302     { AV_CODEC_ID_G2M,          MKTAG('G', '2', 'M', '2') },
00303     { AV_CODEC_ID_G2M,          MKTAG('G', '2', 'M', '3') },
00304     { AV_CODEC_ID_G2M,          MKTAG('G', '2', 'M', '4') },
00305     { AV_CODEC_ID_AMV,          MKTAG('A', 'M', 'V', 'F') },
00306     { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'R', 'A') },
00307     { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'R', 'G') },
00308     { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'Y', '0') },
00309     { AV_CODEC_ID_UTVIDEO,      MKTAG('U', 'L', 'Y', '2') },
00310     { AV_CODEC_ID_VBLE,         MKTAG('V', 'B', 'L', 'E') },
00311     { AV_CODEC_ID_ESCAPE130,    MKTAG('E', '1', '3', '0') },
00312     { AV_CODEC_ID_DXTORY,       MKTAG('x', 't', 'o', 'r') },
00313     { AV_CODEC_ID_ZEROCODEC,    MKTAG('Z', 'E', 'C', 'O') },
00314     { AV_CODEC_ID_Y41P,         MKTAG('Y', '4', '1', 'P') },
00315     { AV_CODEC_ID_FLIC,         MKTAG('A', 'F', 'L', 'C') },
00316     { AV_CODEC_ID_EXR,          MKTAG('e', 'x', 'r', ' ') },
00317     { AV_CODEC_ID_MSS1,         MKTAG('M', 'S', 'S', '1') },
00318     { AV_CODEC_ID_MSA1,         MKTAG('M', 'S', 'A', '1') },
00319     { AV_CODEC_ID_TSCC2,        MKTAG('T', 'S', 'C', '2') },
00320     { AV_CODEC_ID_MTS2,         MKTAG('M', 'T', 'S', '2') },
00321     { AV_CODEC_ID_CLLC,         MKTAG('C', 'L', 'L', 'C') },
00322     { AV_CODEC_ID_MSS2,         MKTAG('M', 'S', 'S', '2') },
00323     { AV_CODEC_ID_SVQ3,         MKTAG('S', 'V', 'Q', '3') },
00324     { AV_CODEC_ID_NONE,         0 }
00325 };
00326 
00327 const AVCodecTag ff_codec_wav_tags[] = {
00328     { AV_CODEC_ID_PCM_S16LE,       0x0001 },
00329     { AV_CODEC_ID_PCM_U8,          0x0001 }, /* must come after s16le in this list */
00330     { AV_CODEC_ID_PCM_S24LE,       0x0001 },
00331     { AV_CODEC_ID_PCM_S32LE,       0x0001 },
00332     { AV_CODEC_ID_ADPCM_MS,        0x0002 },
00333     { AV_CODEC_ID_PCM_F32LE,       0x0003 },
00334     { AV_CODEC_ID_PCM_F64LE,       0x0003 }, /* must come after f32le in this list */
00335     { AV_CODEC_ID_PCM_ALAW,        0x0006 },
00336     { AV_CODEC_ID_PCM_MULAW,       0x0007 },
00337     { AV_CODEC_ID_WMAVOICE,        0x000A },
00338     { AV_CODEC_ID_ADPCM_IMA_WAV,   0x0011 },
00339     { AV_CODEC_ID_PCM_ZORK,        0x0011 }, /* must come after adpcm_ima_wav in this list */
00340     { AV_CODEC_ID_ADPCM_YAMAHA,    0x0020 },
00341     { AV_CODEC_ID_TRUESPEECH,      0x0022 },
00342     { AV_CODEC_ID_GSM_MS,          0x0031 },
00343     { AV_CODEC_ID_AMR_NB,          0x0038 },  /* rogue format number */
00344     { AV_CODEC_ID_G723_1,          0x0042 },
00345     { AV_CODEC_ID_ADPCM_G726,      0x0045 },
00346     { AV_CODEC_ID_MP2,             0x0050 },
00347     { AV_CODEC_ID_MP3,             0x0055 },
00348     { AV_CODEC_ID_AMR_NB,          0x0057 },
00349     { AV_CODEC_ID_AMR_WB,          0x0058 },
00350     { AV_CODEC_ID_ADPCM_IMA_DK4,   0x0061 },  /* rogue format number */
00351     { AV_CODEC_ID_ADPCM_IMA_DK3,   0x0062 },  /* rogue format number */
00352     { AV_CODEC_ID_ADPCM_IMA_WAV,   0x0069 },
00353     { AV_CODEC_ID_VOXWARE,         0x0075 },
00354     { AV_CODEC_ID_AAC,             0x00ff },
00355     { AV_CODEC_ID_SIPR,            0x0130 },
00356     { AV_CODEC_ID_WMAV1,           0x0160 },
00357     { AV_CODEC_ID_WMAV2,           0x0161 },
00358     { AV_CODEC_ID_WMAPRO,          0x0162 },
00359     { AV_CODEC_ID_WMALOSSLESS,     0x0163 },
00360     { AV_CODEC_ID_ADPCM_CT,        0x0200 },
00361     { AV_CODEC_ID_ATRAC3,          0x0270 },
00362     { AV_CODEC_ID_ADPCM_G722,      0x028F },
00363     { AV_CODEC_ID_IMC,             0x0401 },
00364     { AV_CODEC_ID_IAC,             0x0402 },
00365     { AV_CODEC_ID_GSM_MS,          0x1500 },
00366     { AV_CODEC_ID_TRUESPEECH,      0x1501 },
00367     { AV_CODEC_ID_AAC,             0x1600 }, /* ADTS AAC */
00368     { AV_CODEC_ID_AAC_LATM,        0x1602 },
00369     { AV_CODEC_ID_AC3,             0x2000 },
00370     { AV_CODEC_ID_DTS,             0x2001 },
00371     { AV_CODEC_ID_SONIC,           0x2048 },
00372     { AV_CODEC_ID_SONIC_LS,        0x2048 },
00373     { AV_CODEC_ID_PCM_MULAW,       0x6c75 },
00374     { AV_CODEC_ID_AAC,             0x706d },
00375     { AV_CODEC_ID_AAC,             0x4143 },
00376     { AV_CODEC_ID_SPEEX,           0xA109 },
00377     { AV_CODEC_ID_FLAC,            0xF1AC },
00378     { AV_CODEC_ID_ADPCM_SWF,       ('S'<<8)+'F' },
00379     { AV_CODEC_ID_VORBIS,          ('V'<<8)+'o' }, //HACK/FIXME, does vorbis in WAV/AVI have an (in)official id?
00380 
00381     /* FIXME: All of the IDs below are not 16 bit and thus illegal. */
00382     // for NuppelVideo (nuv.c)
00383     { AV_CODEC_ID_PCM_S16LE, MKTAG('R', 'A', 'W', 'A') },
00384     { AV_CODEC_ID_MP3,       MKTAG('L', 'A', 'M', 'E') },
00385     { AV_CODEC_ID_MP3,       MKTAG('M', 'P', '3', ' ') },
00386     { AV_CODEC_ID_NONE,      0 },
00387 };
00388 
00389 const AVCodecGuid ff_codec_wav_guids[] = {
00390     {AV_CODEC_ID_AC3,        {0x2C,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
00391     {AV_CODEC_ID_ATRAC3P,    {0xBF,0xAA,0x23,0xE9,0x58,0xCB,0x71,0x44,0xA1,0x19,0xFF,0xFA,0x01,0xE4,0xCE,0x62}},
00392     {AV_CODEC_ID_EAC3,       {0xAF,0x87,0xFB,0xA7,0x02,0x2D,0xFB,0x42,0xA4,0xD4,0x05,0xCD,0x93,0x84,0x3B,0xDD}},
00393     {AV_CODEC_ID_MP2,        {0x2B,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
00394     {AV_CODEC_ID_NONE}
00395 };
00396 
00397 const AVMetadataConv ff_riff_info_conv[] = {
00398     { "IART", "artist"    },
00399     { "ICMT", "comment"   },
00400     { "ICOP", "copyright" },
00401     { "ICRD", "date"      },
00402     { "IGNR", "genre"     },
00403     { "ILNG", "language"  },
00404     { "INAM", "title"     },
00405     { "IPRD", "album"     },
00406     { "IPRT", "track"     },
00407     { "ISFT", "encoder"   },
00408     { "ISMP", "timecode"  },
00409     { "ITCH", "encoded_by"},
00410     { 0 },
00411 };
00412 
00413 const char ff_riff_tags[][5] = {
00414     "IARL", "IART", "ICMS", "ICMT", "ICOP", "ICRD", "ICRP", "IDIM", "IDPI",
00415     "IENG", "IGNR", "IKEY", "ILGT", "ILNG", "IMED", "INAM", "IPLT", "IPRD",
00416     "IPRT", "ISBJ", "ISFT", "ISHP", "ISMP", "ISRC", "ISRF", "ITCH",
00417     {0}
00418 };
00419 
00420 #if CONFIG_MUXERS
00421 int64_t ff_start_tag(AVIOContext *pb, const char *tag)
00422 {
00423     ffio_wfourcc(pb, tag);
00424     avio_wl32(pb, 0);
00425     return avio_tell(pb);
00426 }
00427 
00428 void ff_end_tag(AVIOContext *pb, int64_t start)
00429 {
00430     int64_t pos;
00431 
00432     pos = avio_tell(pb);
00433     avio_seek(pb, start - 4, SEEK_SET);
00434     avio_wl32(pb, (uint32_t)(pos - start));
00435     avio_seek(pb, pos, SEEK_SET);
00436 }
00437 
00438 /* WAVEFORMATEX header */
00439 /* returns the size or -1 on error */
00440 int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc)
00441 {
00442     int bps, blkalign, bytespersec, frame_size;
00443     int hdrsize = 18;
00444     int waveformatextensible;
00445     uint8_t temp[256];
00446     uint8_t *riff_extradata= temp;
00447     uint8_t *riff_extradata_start= temp;
00448 
00449     if(!enc->codec_tag || enc->codec_tag > 0xffff)
00450         return -1;
00451 
00452     /* We use the known constant frame size for the codec if known, otherwise
00453        fallback to using AVCodecContext.frame_size, which is not as reliable
00454        for indicating packet duration */
00455     frame_size = av_get_audio_frame_duration(enc, 0);
00456     if (!frame_size)
00457         frame_size = enc->frame_size;
00458 
00459     waveformatextensible =   (enc->channels > 2 && enc->channel_layout)
00460                           || enc->sample_rate > 48000
00461                           || av_get_bits_per_sample(enc->codec_id) > 16;
00462 
00463     if (waveformatextensible) {
00464         avio_wl16(pb, 0xfffe);
00465     } else {
00466         avio_wl16(pb, enc->codec_tag);
00467     }
00468     avio_wl16(pb, enc->channels);
00469     avio_wl32(pb, enc->sample_rate);
00470     if (enc->codec_id == CODEC_ID_ATRAC3 ||
00471         enc->codec_id == CODEC_ID_G723_1 ||
00472         enc->codec_id == CODEC_ID_GSM_MS ||
00473         enc->codec_id == CODEC_ID_MP2    ||
00474         enc->codec_id == CODEC_ID_MP3) {
00475         bps = 0;
00476     } else {
00477         if (!(bps = av_get_bits_per_sample(enc->codec_id))) {
00478             if (enc->bits_per_coded_sample)
00479                 bps = enc->bits_per_coded_sample;
00480             else
00481                 bps = 16; // default to 16
00482         }
00483     }
00484     if(bps != enc->bits_per_coded_sample && enc->bits_per_coded_sample){
00485         av_log(enc, AV_LOG_WARNING, "requested bits_per_coded_sample (%d) and actually stored (%d) differ\n", enc->bits_per_coded_sample, bps);
00486     }
00487 
00488     if (enc->codec_id == AV_CODEC_ID_MP2 || enc->codec_id == AV_CODEC_ID_MP3) {
00489         /* this is wrong, but it seems many demuxers do not work if this is set
00490            correctly */
00491         blkalign = frame_size;
00492         //blkalign = 144 * enc->bit_rate/enc->sample_rate;
00493     } else if (enc->codec_id == AV_CODEC_ID_AC3) {
00494             blkalign = 3840; //maximum bytes per frame
00495     } else if (enc->codec_id == AV_CODEC_ID_AAC) {
00496             blkalign = 768 * enc->channels; //maximum bytes per frame
00497     } else if (enc->codec_id == AV_CODEC_ID_G723_1) {
00498             blkalign = 24;
00499     } else if (enc->block_align != 0) { /* specified by the codec */
00500         blkalign = enc->block_align;
00501     } else
00502         blkalign = bps * enc->channels / av_gcd(8, bps);
00503     if (enc->codec_id == AV_CODEC_ID_PCM_U8 ||
00504         enc->codec_id == AV_CODEC_ID_PCM_S24LE ||
00505         enc->codec_id == AV_CODEC_ID_PCM_S32LE ||
00506         enc->codec_id == AV_CODEC_ID_PCM_F32LE ||
00507         enc->codec_id == AV_CODEC_ID_PCM_F64LE ||
00508         enc->codec_id == AV_CODEC_ID_PCM_S16LE) {
00509         bytespersec = enc->sample_rate * blkalign;
00510     } else if (enc->codec_id == AV_CODEC_ID_G723_1) {
00511         bytespersec = 800;
00512     } else {
00513         bytespersec = enc->bit_rate / 8;
00514     }
00515     avio_wl32(pb, bytespersec); /* bytes per second */
00516     avio_wl16(pb, blkalign); /* block align */
00517     avio_wl16(pb, bps); /* bits per sample */
00518     if (enc->codec_id == AV_CODEC_ID_MP3) {
00519         hdrsize += 12;
00520         bytestream_put_le16(&riff_extradata, 1);    /* wID */
00521         bytestream_put_le32(&riff_extradata, 2);    /* fdwFlags */
00522         bytestream_put_le16(&riff_extradata, 1152); /* nBlockSize */
00523         bytestream_put_le16(&riff_extradata, 1);    /* nFramesPerBlock */
00524         bytestream_put_le16(&riff_extradata, 1393); /* nCodecDelay */
00525     } else if (enc->codec_id == AV_CODEC_ID_MP2) {
00526         hdrsize += 22;
00527         bytestream_put_le16(&riff_extradata, 2);                          /* fwHeadLayer */
00528         bytestream_put_le32(&riff_extradata, enc->bit_rate);              /* dwHeadBitrate */
00529         bytestream_put_le16(&riff_extradata, enc->channels == 2 ? 1 : 8); /* fwHeadMode */
00530         bytestream_put_le16(&riff_extradata, 0);                          /* fwHeadModeExt */
00531         bytestream_put_le16(&riff_extradata, 1);                          /* wHeadEmphasis */
00532         bytestream_put_le16(&riff_extradata, 16);                         /* fwHeadFlags */
00533         bytestream_put_le32(&riff_extradata, 0);                          /* dwPTSLow */
00534         bytestream_put_le32(&riff_extradata, 0);                          /* dwPTSHigh */
00535     } else if (enc->codec_id == AV_CODEC_ID_G723_1) {
00536         hdrsize += 20;
00537         bytestream_put_le32(&riff_extradata, 0x9ace0002); /* extradata needed for msacm g723.1 codec */
00538         bytestream_put_le32(&riff_extradata, 0xaea2f732);
00539         bytestream_put_le16(&riff_extradata, 0xacde);
00540     } else if (enc->codec_id == AV_CODEC_ID_GSM_MS || enc->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {
00541         hdrsize += 2;
00542         bytestream_put_le16(&riff_extradata, frame_size); /* wSamplesPerBlock */
00543     } else if(enc->extradata_size){
00544         riff_extradata_start= enc->extradata;
00545         riff_extradata= enc->extradata + enc->extradata_size;
00546         hdrsize += enc->extradata_size;
00547     }
00548     if(waveformatextensible) {                                    /* write WAVEFORMATEXTENSIBLE extensions */
00549         hdrsize += 22;
00550         avio_wl16(pb, riff_extradata - riff_extradata_start + 22); /* 22 is WAVEFORMATEXTENSIBLE size */
00551         avio_wl16(pb, bps);                                        /* ValidBitsPerSample || SamplesPerBlock || Reserved */
00552         avio_wl32(pb, enc->channel_layout);                        /* dwChannelMask */
00553         avio_wl32(pb, enc->codec_tag);                             /* GUID + next 3 */
00554         avio_wl32(pb, 0x00100000);
00555         avio_wl32(pb, 0xAA000080);
00556         avio_wl32(pb, 0x719B3800);
00557     } else {
00558         avio_wl16(pb, riff_extradata - riff_extradata_start); /* cbSize */
00559     }
00560     avio_write(pb, riff_extradata_start, riff_extradata - riff_extradata_start);
00561     if(hdrsize&1){
00562         hdrsize++;
00563         avio_w8(pb, 0);
00564     }
00565 
00566     return hdrsize;
00567 }
00568 
00569 /* BITMAPINFOHEADER header */
00570 void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf)
00571 {
00572     avio_wl32(pb, 40 + enc->extradata_size); /* size */
00573     avio_wl32(pb, enc->width);
00574     //We always store RGB TopDown
00575     avio_wl32(pb, enc->codec_tag ? enc->height : -enc->height);
00576     avio_wl16(pb, 1); /* planes */
00577 
00578     avio_wl16(pb, enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24); /* depth */
00579     /* compression type */
00580     avio_wl32(pb, enc->codec_tag);
00581     avio_wl32(pb, (enc->width * enc->height * (enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24)+7) / 8);
00582     avio_wl32(pb, 0);
00583     avio_wl32(pb, 0);
00584     avio_wl32(pb, 0);
00585     avio_wl32(pb, 0);
00586 
00587     avio_write(pb, enc->extradata, enc->extradata_size);
00588 
00589     if (!for_asf && enc->extradata_size & 1)
00590         avio_w8(pb, 0);
00591 }
00592 #endif //CONFIG_MUXERS
00593 
00594 #if CONFIG_DEMUXERS
00595 /* We could be given one of the three possible structures here:
00596  * WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
00597  * is an expansion of the previous one with the fields added
00598  * at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
00599  * WAVEFORMATEX adds 'WORD  cbSize' and basically makes itself
00600  * an openended structure.
00601  */
00602 int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
00603 {
00604     int id;
00605 
00606     id = avio_rl16(pb);
00607     codec->codec_type = AVMEDIA_TYPE_AUDIO;
00608     codec->channels = avio_rl16(pb);
00609     codec->sample_rate = avio_rl32(pb);
00610     codec->bit_rate = avio_rl32(pb) * 8;
00611     codec->block_align = avio_rl16(pb);
00612     if (size == 14) {  /* We're dealing with plain vanilla WAVEFORMAT */
00613         codec->bits_per_coded_sample = 8;
00614     }else
00615         codec->bits_per_coded_sample = avio_rl16(pb);
00616     if (id == 0xFFFE) {
00617         codec->codec_tag = 0;
00618     } else {
00619         codec->codec_tag = id;
00620         codec->codec_id = ff_wav_codec_get_id(id, codec->bits_per_coded_sample);
00621     }
00622     if (size >= 18) {  /* We're obviously dealing with WAVEFORMATEX */
00623         int cbSize = avio_rl16(pb); /* cbSize */
00624         size -= 18;
00625         cbSize = FFMIN(size, cbSize);
00626         if (cbSize >= 22 && id == 0xfffe) { /* WAVEFORMATEXTENSIBLE */
00627             ff_asf_guid subformat;
00628             int bps = avio_rl16(pb);
00629             if (bps)
00630                 codec->bits_per_coded_sample = bps;
00631             codec->channel_layout = avio_rl32(pb); /* dwChannelMask */
00632             ff_get_guid(pb, &subformat);
00633             if (!memcmp(subformat + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
00634                 codec->codec_tag = AV_RL32(subformat);
00635                 codec->codec_id = ff_wav_codec_get_id(codec->codec_tag, codec->bits_per_coded_sample);
00636             } else {
00637                 codec->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subformat);
00638                 if (!codec->codec_id)
00639                     av_log(codec, AV_LOG_WARNING, "unknown subformat:"FF_PRI_GUID"\n", FF_ARG_GUID(subformat));
00640             }
00641             cbSize -= 22;
00642             size -= 22;
00643         }
00644         codec->extradata_size = cbSize;
00645         if (cbSize > 0) {
00646             av_free(codec->extradata);
00647             codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
00648             if (!codec->extradata)
00649                 return AVERROR(ENOMEM);
00650             avio_read(pb, codec->extradata, codec->extradata_size);
00651             size -= cbSize;
00652         }
00653 
00654         /* It is possible for the chunk to contain garbage at the end */
00655         if (size > 0)
00656             avio_skip(pb, size);
00657     }
00658     if (codec->codec_id == AV_CODEC_ID_AAC_LATM) {
00659         /* channels and sample_rate values are those prior to applying SBR and/or PS */
00660         codec->channels    = 0;
00661         codec->sample_rate = 0;
00662     }
00663     /* override bits_per_coded_sample for G.726 */
00664     if (codec->codec_id == AV_CODEC_ID_ADPCM_G726)
00665         codec->bits_per_coded_sample = codec->bit_rate / codec->sample_rate;
00666 
00667     return 0;
00668 }
00669 
00670 
00671 enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
00672 {
00673     enum AVCodecID id;
00674     id = ff_codec_get_id(ff_codec_wav_tags, tag);
00675     if (id <= 0)
00676         return id;
00677     /* handle specific u8 codec */
00678     if (id == AV_CODEC_ID_PCM_S16LE && bps == 8)
00679         id = AV_CODEC_ID_PCM_U8;
00680     if (id == AV_CODEC_ID_PCM_S16LE && bps == 24)
00681         id = AV_CODEC_ID_PCM_S24LE;
00682     if (id == AV_CODEC_ID_PCM_S16LE && bps == 32)
00683         id = AV_CODEC_ID_PCM_S32LE;
00684     if (id == AV_CODEC_ID_PCM_F32LE && bps == 64)
00685         id = AV_CODEC_ID_PCM_F64LE;
00686     if (id == AV_CODEC_ID_ADPCM_IMA_WAV && bps == 8)
00687         id = AV_CODEC_ID_PCM_ZORK;
00688     return id;
00689 }
00690 
00691 int ff_get_bmp_header(AVIOContext *pb, AVStream *st, unsigned *esize)
00692 {
00693     int tag1;
00694     if(esize) *esize = avio_rl32(pb);
00695     else               avio_rl32(pb);
00696     st->codec->width = avio_rl32(pb);
00697     st->codec->height = (int32_t)avio_rl32(pb);
00698     avio_rl16(pb); /* planes */
00699     st->codec->bits_per_coded_sample= avio_rl16(pb); /* depth */
00700     tag1 = avio_rl32(pb);
00701     avio_rl32(pb); /* ImageSize */
00702     avio_rl32(pb); /* XPelsPerMeter */
00703     avio_rl32(pb); /* YPelsPerMeter */
00704     avio_rl32(pb); /* ClrUsed */
00705     avio_rl32(pb); /* ClrImportant */
00706     return tag1;
00707 }
00708 #endif // CONFIG_DEMUXERS
00709 
00710 void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale)
00711 {
00712     int gcd;
00713     int audio_frame_size;
00714 
00715     /* We use the known constant frame size for the codec if known, otherwise
00716        fallback to using AVCodecContext.frame_size, which is not as reliable
00717        for indicating packet duration */
00718     audio_frame_size = av_get_audio_frame_duration(stream, 0);
00719     if (!audio_frame_size)
00720         audio_frame_size = stream->frame_size;
00721 
00722     *au_ssize= stream->block_align;
00723     if (audio_frame_size && stream->sample_rate) {
00724         *au_scale = audio_frame_size;
00725         *au_rate= stream->sample_rate;
00726     }else if(stream->codec_type == AVMEDIA_TYPE_VIDEO ||
00727              stream->codec_type == AVMEDIA_TYPE_DATA ||
00728              stream->codec_type == AVMEDIA_TYPE_SUBTITLE){
00729         *au_scale= stream->time_base.num;
00730         *au_rate = stream->time_base.den;
00731     }else{
00732         *au_scale= stream->block_align ? stream->block_align*8 : 8;
00733         *au_rate = stream->bit_rate ? stream->bit_rate : 8*stream->sample_rate;
00734     }
00735     gcd= av_gcd(*au_scale, *au_rate);
00736     *au_scale /= gcd;
00737     *au_rate /= gcd;
00738 }
00739 
00740 void ff_get_guid(AVIOContext *s, ff_asf_guid *g)
00741 {
00742     av_assert0(sizeof(*g) == 16); //compiler will optimize this out
00743     if (avio_read(s, *g, sizeof(*g)) < (int)sizeof(*g))
00744         memset(*g, 0, sizeof(*g));
00745 }
00746 
00747 enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
00748 {
00749     int i;
00750     for (i = 0; guids[i].id != AV_CODEC_ID_NONE; i++) {
00751         if (!ff_guidcmp(guids[i].guid, guid))
00752             return guids[i].id;
00753     }
00754     return AV_CODEC_ID_NONE;
00755 }
00756 
00757 int ff_read_riff_info(AVFormatContext *s, int64_t size)
00758 {
00759     int64_t start, end, cur;
00760     AVIOContext *pb = s->pb;
00761 
00762     start = avio_tell(pb);
00763     end = start + size;
00764 
00765     while ((cur = avio_tell(pb)) >= 0 && cur <= end - 8 /* = tag + size */) {
00766         uint32_t chunk_code;
00767         int64_t chunk_size;
00768         char key[5] = {0};
00769         char *value;
00770 
00771         chunk_code = avio_rl32(pb);
00772         chunk_size = avio_rl32(pb);
00773         if (chunk_size > end || end - chunk_size < cur || chunk_size == UINT_MAX) {
00774             av_log(s, AV_LOG_ERROR, "too big INFO subchunk\n");
00775             return AVERROR_INVALIDDATA;
00776         }
00777 
00778         chunk_size += (chunk_size & 1);
00779 
00780         value = av_malloc(chunk_size + 1);
00781         if (!value) {
00782             av_log(s, AV_LOG_ERROR, "out of memory, unable to read INFO tag\n");
00783             return AVERROR(ENOMEM);
00784         }
00785 
00786         AV_WL32(key, chunk_code);
00787 
00788         if (avio_read(pb, value, chunk_size) != chunk_size) {
00789             av_freep(&value);
00790             av_log(s, AV_LOG_ERROR, "premature end of file while reading INFO tag\n");
00791             return AVERROR_INVALIDDATA;
00792         }
00793 
00794         value[chunk_size] = 0;
00795 
00796         av_dict_set(&s->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
00797     }
00798 
00799     return 0;
00800 }