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ffmpeg/libavformat/riff.c
Michael Niedermayer 47335126c0 ff_end_tag: assert that the start is aligned. 
If its start is not aligned then aligning its end will
likely break many demuxers as they check the size and not
the position.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2013-02-08 12:51:52 +01:00

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/*
* RIFF common functions and data
* Copyright (c) 2000 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/mathematics.h"
#include "libavcodec/avcodec.h"
#include "avformat.h"
#include "avio_internal.h"
#include "riff.h"
#include "libavcodec/bytestream.h"
#include "libavutil/avassert.h"
/* Note: when encoding, the first matching tag is used, so order is
important if multiple tags possible for a given codec.
Note also that this list is used for more than just riff, other
files use it as well.
*/
const AVCodecTag ff_codec_bmp_tags[] = {
{ AV_CODEC_ID_H264, MKTAG('H', '2', '6', '4') },
{ AV_CODEC_ID_H264, MKTAG('h', '2', '6', '4') },
{ AV_CODEC_ID_H264, MKTAG('X', '2', '6', '4') },
{ AV_CODEC_ID_H264, MKTAG('x', '2', '6', '4') },
{ AV_CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') },
{ AV_CODEC_ID_H264, MKTAG('D', 'A', 'V', 'C') },
{ AV_CODEC_ID_H264, MKTAG('S', 'M', 'V', '2') },
{ AV_CODEC_ID_H264, MKTAG('V', 'S', 'S', 'H') },
{ AV_CODEC_ID_H264, MKTAG('Q', '2', '6', '4') }, /* QNAP surveillance system */
{ AV_CODEC_ID_H264, MKTAG('V', '2', '6', '4') },
{ AV_CODEC_ID_H263, MKTAG('H', '2', '6', '3') },
{ AV_CODEC_ID_H263, MKTAG('X', '2', '6', '3') },
{ AV_CODEC_ID_H263, MKTAG('T', '2', '6', '3') },
{ AV_CODEC_ID_H263, MKTAG('L', '2', '6', '3') },
{ AV_CODEC_ID_H263, MKTAG('V', 'X', '1', 'K') },
{ AV_CODEC_ID_H263, MKTAG('Z', 'y', 'G', 'o') },
{ AV_CODEC_ID_H263, MKTAG('M', '2', '6', '3') },
{ AV_CODEC_ID_H263, MKTAG('l', 's', 'v', 'm') },
{ AV_CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },
{ AV_CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
{ AV_CODEC_ID_H261, MKTAG('H', '2', '6', '1') },
{ AV_CODEC_ID_H263, MKTAG('U', '2', '6', '3') },
{ AV_CODEC_ID_MPEG4, MKTAG('F', 'M', 'P', '4') },
{ AV_CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') },
{ AV_CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0') },
{ AV_CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
{ AV_CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
{ AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
{ AV_CODEC_ID_MPEG4, MKTAG( 4 , 0 , 0 , 0 ) }, /* some broken avi use this */
{ AV_CODEC_ID_MPEG4, MKTAG('Z', 'M', 'P', '4') }, /* some broken avi use this */
{ AV_CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', '1') },
{ AV_CODEC_ID_MPEG4, MKTAG('B', 'L', 'Z', '0') },
{ AV_CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
{ AV_CODEC_ID_MPEG4, MKTAG('U', 'M', 'P', '4') },
{ AV_CODEC_ID_MPEG4, MKTAG('W', 'V', '1', 'F') },
{ AV_CODEC_ID_MPEG4, MKTAG('S', 'E', 'D', 'G') },
{ AV_CODEC_ID_MPEG4, MKTAG('R', 'M', 'P', '4') },
{ AV_CODEC_ID_MPEG4, MKTAG('3', 'I', 'V', '2') },
{ AV_CODEC_ID_MPEG4, MKTAG('W', 'A', 'W', 'V') }, /* WaWv MPEG-4 Video Codec */
{ AV_CODEC_ID_MPEG4, MKTAG('F', 'F', 'D', 'S') },
{ AV_CODEC_ID_MPEG4, MKTAG('F', 'V', 'F', 'W') },
{ AV_CODEC_ID_MPEG4, MKTAG('D', 'C', 'O', 'D') },
{ AV_CODEC_ID_MPEG4, MKTAG('M', 'V', 'X', 'M') },
{ AV_CODEC_ID_MPEG4, MKTAG('P', 'M', '4', 'V') },
{ AV_CODEC_ID_MPEG4, MKTAG('S', 'M', 'P', '4') },
{ AV_CODEC_ID_MPEG4, MKTAG('D', 'X', 'G', 'M') },
{ AV_CODEC_ID_MPEG4, MKTAG('V', 'I', 'D', 'M') },
{ AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'T', '3') },
{ AV_CODEC_ID_MPEG4, MKTAG('G', 'E', 'O', 'X') },
{ AV_CODEC_ID_MPEG4, MKTAG('H', 'D', 'X', '4') }, /* flipped video */
{ AV_CODEC_ID_MPEG4, MKTAG('D', 'M', 'K', '2') },
{ AV_CODEC_ID_MPEG4, MKTAG('D', 'I', 'G', 'I') },
{ AV_CODEC_ID_MPEG4, MKTAG('I', 'N', 'M', 'C') },
{ AV_CODEC_ID_MPEG4, MKTAG('E', 'P', 'H', 'V') }, /* Ephv MPEG-4 */
{ AV_CODEC_ID_MPEG4, MKTAG('E', 'M', '4', 'A') },
{ AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'C', 'C') }, /* Divio MPEG-4 */
{ AV_CODEC_ID_MPEG4, MKTAG('S', 'N', '4', '0') },
{ AV_CODEC_ID_MPEG4, MKTAG('V', 'S', 'P', 'X') },
{ AV_CODEC_ID_MPEG4, MKTAG('U', 'L', 'D', 'X') },
{ AV_CODEC_ID_MPEG4, MKTAG('G', 'E', 'O', 'V') },
{ AV_CODEC_ID_MPEG4, MKTAG('S', 'I', 'P', 'P') }, /* Samsung SHR-6040 */
{ AV_CODEC_ID_MPEG4, MKTAG('S', 'M', '4', 'V') },
{ AV_CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'X') },
{ AV_CODEC_ID_MPEG4, MKTAG('D', 'r', 'e', 'X') },
{ AV_CODEC_ID_MPEG4, MKTAG('Q', 'M', 'P', '4') }, /* QNAP Systems */
{ AV_CODEC_ID_MPEG4, MKTAG('P', 'L', 'V', '1') }, /* Pelco DVR MPEG-4 */
{ AV_CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
{ AV_CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3') },
{ AV_CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', 'G', '3') },
{ AV_CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '5') },
{ AV_CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '6') },
{ AV_CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '4') },
{ AV_CODEC_ID_MSMPEG4V3, MKTAG('D', 'V', 'X', '3') },
{ AV_CODEC_ID_MSMPEG4V3, MKTAG('A', 'P', '4', '1') },
{ AV_CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '1') },
{ AV_CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '0') },
{ AV_CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') },
{ AV_CODEC_ID_MSMPEG4V2, MKTAG('D', 'I', 'V', '2') },
{ AV_CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') },
{ AV_CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', '4', '1') },
{ AV_CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') },
{ AV_CODEC_ID_WMV2, MKTAG('W', 'M', 'V', '2') },
{ AV_CODEC_ID_WMV2, MKTAG('G', 'X', 'V', 'E') },
{ AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') },
{ AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') },
{ AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '1') },
{ AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') },
{ AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', '2', '5') },
{ AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', '0') },
{ AV_CODEC_ID_DVVIDEO, MKTAG('c', 'd', 'v', 'c') }, /* Canopus DV */
{ AV_CODEC_ID_DVVIDEO, MKTAG('C', 'D', 'V', 'H') }, /* Canopus DV */
{ AV_CODEC_ID_DVVIDEO, MKTAG('C', 'D', 'V', '5') }, /* Canopus DV */
{ AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') },
{ AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 's') },
{ AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '1') },
{ AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'i', 's') },
{ AV_CODEC_ID_DVVIDEO, MKTAG('p', 'd', 'v', 'c') },
{ AV_CODEC_ID_DVVIDEO, MKTAG('S', 'L', '2', '5') },
{ AV_CODEC_ID_DVVIDEO, MKTAG('S', 'L', 'D', 'V') },
{ AV_CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') },
{ AV_CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') },
{ AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'p', 'g', '2') },
{ AV_CODEC_ID_MPEG2VIDEO, MKTAG('M', 'P', 'E', 'G') },
{ AV_CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') },
{ AV_CODEC_ID_MPEG2VIDEO, MKTAG('P', 'I', 'M', '2') },
{ AV_CODEC_ID_MPEG1VIDEO, MKTAG('V', 'C', 'R', '2') },
{ AV_CODEC_ID_MPEG1VIDEO, MKTAG( 1 , 0 , 0 , 16) },
{ AV_CODEC_ID_MPEG2VIDEO, MKTAG( 2 , 0 , 0 , 16) },
{ AV_CODEC_ID_MPEG4, MKTAG( 4 , 0 , 0 , 16) },
{ AV_CODEC_ID_MPEG2VIDEO, MKTAG('D', 'V', 'R', ' ') },
{ AV_CODEC_ID_MPEG2VIDEO, MKTAG('M', 'M', 'E', 'S') },
{ AV_CODEC_ID_MPEG2VIDEO, MKTAG('L', 'M', 'P', '2') }, /* Lead MPEG2 in avi */
{ AV_CODEC_ID_MPEG2VIDEO, MKTAG('s', 'l', 'i', 'f') },
{ AV_CODEC_ID_MPEG2VIDEO, MKTAG('E', 'M', '2', 'V') },
{ AV_CODEC_ID_MPEG2VIDEO, MKTAG('M', '7', '0', '1') }, /* Matrox MPEG2 intra-only */
{ AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'p', 'g', 'v') },
{ AV_CODEC_ID_MPEG1VIDEO, MKTAG('B', 'W', '1', '0') },
{ AV_CODEC_ID_MPEG1VIDEO, MKTAG('X', 'M', 'P', 'G') }, /* Xing MPEG intra only */
{ AV_CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
{ AV_CODEC_ID_MJPEG, MKTAG('L', 'J', 'P', 'G') },
{ AV_CODEC_ID_MJPEG, MKTAG('d', 'm', 'b', '1') },
{ AV_CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'a') },
{ AV_CODEC_ID_LJPEG, MKTAG('L', 'J', 'P', 'G') },
{ AV_CODEC_ID_MJPEG, MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */
{ AV_CODEC_ID_JPEGLS, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - encoder */
{ AV_CODEC_ID_JPEGLS, MKTAG('M', 'J', 'P', 'G') },
{ AV_CODEC_ID_MJPEG, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - decoder */
{ AV_CODEC_ID_MJPEG, MKTAG('j', 'p', 'e', 'g') },
{ AV_CODEC_ID_MJPEG, MKTAG('I', 'J', 'P', 'G') },
{ AV_CODEC_ID_AVRN, MKTAG('A', 'V', 'R', 'n') },
{ AV_CODEC_ID_MJPEG, MKTAG('A', 'C', 'D', 'V') },
{ AV_CODEC_ID_MJPEG, MKTAG('Q', 'I', 'V', 'G') },
{ AV_CODEC_ID_MJPEG, MKTAG('S', 'L', 'M', 'J') }, /* SL M-JPEG */
{ AV_CODEC_ID_MJPEG, MKTAG('C', 'J', 'P', 'G') }, /* Creative Webcam JPEG */
{ AV_CODEC_ID_MJPEG, MKTAG('I', 'J', 'L', 'V') }, /* Intel JPEG Library Video Codec */
{ AV_CODEC_ID_MJPEG, MKTAG('M', 'V', 'J', 'P') }, /* Midvid JPEG Video Codec */
{ AV_CODEC_ID_MJPEG, MKTAG('A', 'V', 'I', '1') },
{ AV_CODEC_ID_MJPEG, MKTAG('A', 'V', 'I', '2') },
{ AV_CODEC_ID_MJPEG, MKTAG('M', 'T', 'S', 'J') },
{ AV_CODEC_ID_MJPEG, MKTAG('Z', 'J', 'P', 'G') }, /* Paradigm Matrix M-JPEG Codec */
{ AV_CODEC_ID_MJPEG, MKTAG('M', 'M', 'J', 'P') },
{ AV_CODEC_ID_HUFFYUV, MKTAG('H', 'F', 'Y', 'U') },
{ AV_CODEC_ID_FFVHUFF, MKTAG('F', 'F', 'V', 'H') },
{ AV_CODEC_ID_CYUV, MKTAG('C', 'Y', 'U', 'V') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG( 0 , 0 , 0 , 0 ) },
{ AV_CODEC_ID_RAWVIDEO, MKTAG( 3 , 0 , 0 , 0 ) },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('I', '4', '2', '0') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'U', 'Y', '2') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '2', '2') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('V', '4', '2', '2') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'U', 'N', 'V') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'N', 'V') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'N', 'Y') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('u', 'y', 'v', '1') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('2', 'V', 'u', '1') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('2', 'v', 'u', 'y') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', 's') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', '2') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('P', '4', '2', '2') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', '1', '2') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', '1', '6') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', '2', '4') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'V', 'Y') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('V', 'Y', 'U', 'Y') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('I', 'Y', 'U', 'V') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '8', '0', '0') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '8', ' ', ' ') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('H', 'D', 'Y', 'C') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', 'U', '9') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('V', 'D', 'T', 'Z') }, /* SoftLab-NSK VideoTizer */
{ AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '1', '1') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('N', 'V', '1', '2') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('N', 'V', '2', '1') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '1', 'B') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '2', 'B') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'U', 'V', '9') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', 'U', '9') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('a', 'u', 'v', '2') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', 'Y', 'U') },
{ AV_CODEC_ID_FRWU, MKTAG('F', 'R', 'W', 'U') },
{ AV_CODEC_ID_R10K, MKTAG('R', '1', '0', 'k') },
{ AV_CODEC_ID_R210, MKTAG('r', '2', '1', '0') },
{ AV_CODEC_ID_V210, MKTAG('v', '2', '1', '0') },
{ AV_CODEC_ID_V308, MKTAG('v', '3', '0', '8') },
{ AV_CODEC_ID_V408, MKTAG('v', '4', '0', '8') },
{ AV_CODEC_ID_AYUV, MKTAG('A', 'Y', 'U', 'V') },
{ AV_CODEC_ID_V410, MKTAG('v', '4', '1', '0') },
{ AV_CODEC_ID_YUV4, MKTAG('y', 'u', 'v', '4') },
{ AV_CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '1') },
{ AV_CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '2') },
{ AV_CODEC_ID_INDEO4, MKTAG('I', 'V', '4', '1') },
{ AV_CODEC_ID_INDEO5, MKTAG('I', 'V', '5', '0') },
{ AV_CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') },
{ AV_CODEC_ID_VP3, MKTAG('V', 'P', '3', '0') },
{ AV_CODEC_ID_VP5, MKTAG('V', 'P', '5', '0') },
{ AV_CODEC_ID_VP6, MKTAG('V', 'P', '6', '0') },
{ AV_CODEC_ID_VP6, MKTAG('V', 'P', '6', '1') },
{ AV_CODEC_ID_VP6, MKTAG('V', 'P', '6', '2') },
{ AV_CODEC_ID_VP6F, MKTAG('V', 'P', '6', 'F') },
{ AV_CODEC_ID_VP6F, MKTAG('F', 'L', 'V', '4') },
{ AV_CODEC_ID_VP8, MKTAG('V', 'P', '8', '0') },
{ AV_CODEC_ID_ASV1, MKTAG('A', 'S', 'V', '1') },
{ AV_CODEC_ID_ASV2, MKTAG('A', 'S', 'V', '2') },
{ AV_CODEC_ID_VCR1, MKTAG('V', 'C', 'R', '1') },
{ AV_CODEC_ID_FFV1, MKTAG('F', 'F', 'V', '1') },
{ AV_CODEC_ID_XAN_WC4, MKTAG('X', 'x', 'a', 'n') },
{ AV_CODEC_ID_MIMIC, MKTAG('L', 'M', '2', '0') },
{ AV_CODEC_ID_MSRLE, MKTAG('m', 'r', 'l', 'e') },
{ AV_CODEC_ID_MSRLE, MKTAG( 1 , 0 , 0 , 0 ) },
{ AV_CODEC_ID_MSRLE, MKTAG( 2 , 0 , 0 , 0 ) },
{ AV_CODEC_ID_MSVIDEO1, MKTAG('M', 'S', 'V', 'C') },
{ AV_CODEC_ID_MSVIDEO1, MKTAG('m', 's', 'v', 'c') },
{ AV_CODEC_ID_MSVIDEO1, MKTAG('C', 'R', 'A', 'M') },
{ AV_CODEC_ID_MSVIDEO1, MKTAG('c', 'r', 'a', 'm') },
{ AV_CODEC_ID_MSVIDEO1, MKTAG('W', 'H', 'A', 'M') },
{ AV_CODEC_ID_MSVIDEO1, MKTAG('w', 'h', 'a', 'm') },
{ AV_CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') },
{ AV_CODEC_ID_TRUEMOTION1, MKTAG('D', 'U', 'C', 'K') },
{ AV_CODEC_ID_TRUEMOTION1, MKTAG('P', 'V', 'E', 'Z') },
{ AV_CODEC_ID_MSZH, MKTAG('M', 'S', 'Z', 'H') },
{ AV_CODEC_ID_ZLIB, MKTAG('Z', 'L', 'I', 'B') },
{ AV_CODEC_ID_SNOW, MKTAG('S', 'N', 'O', 'W') },
{ AV_CODEC_ID_4XM, MKTAG('4', 'X', 'M', 'V') },
{ AV_CODEC_ID_FLV1, MKTAG('F', 'L', 'V', '1') },
{ AV_CODEC_ID_FLV1, MKTAG('S', '2', '6', '3') },
{ AV_CODEC_ID_FLASHSV, MKTAG('F', 'S', 'V', '1') },
{ AV_CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') },
{ AV_CODEC_ID_TSCC, MKTAG('t', 's', 'c', 'c') },
{ AV_CODEC_ID_ULTI, MKTAG('U', 'L', 'T', 'I') },
{ AV_CODEC_ID_VIXL, MKTAG('V', 'I', 'X', 'L') },
{ AV_CODEC_ID_QPEG, MKTAG('Q', 'P', 'E', 'G') },
{ AV_CODEC_ID_QPEG, MKTAG('Q', '1', '.', '0') },
{ AV_CODEC_ID_QPEG, MKTAG('Q', '1', '.', '1') },
{ AV_CODEC_ID_WMV3, MKTAG('W', 'M', 'V', '3') },
{ AV_CODEC_ID_WMV3IMAGE, MKTAG('W', 'M', 'V', 'P') },
{ AV_CODEC_ID_VC1, MKTAG('W', 'V', 'C', '1') },
{ AV_CODEC_ID_VC1, MKTAG('W', 'M', 'V', 'A') },
{ AV_CODEC_ID_VC1IMAGE, MKTAG('W', 'V', 'P', '2') },
{ AV_CODEC_ID_LOCO, MKTAG('L', 'O', 'C', 'O') },
{ AV_CODEC_ID_WNV1, MKTAG('W', 'N', 'V', '1') },
{ AV_CODEC_ID_WNV1, MKTAG('Y', 'U', 'V', '8') },
{ AV_CODEC_ID_AASC, MKTAG('A', 'A', 'S', '4') },
{ AV_CODEC_ID_AASC, MKTAG('A', 'A', 'S', 'C') },
{ AV_CODEC_ID_INDEO2, MKTAG('R', 'T', '2', '1') },
{ AV_CODEC_ID_FRAPS, MKTAG('F', 'P', 'S', '1') },
{ AV_CODEC_ID_THEORA, MKTAG('t', 'h', 'e', 'o') },
{ AV_CODEC_ID_TRUEMOTION2, MKTAG('T', 'M', '2', '0') },
{ AV_CODEC_ID_CSCD, MKTAG('C', 'S', 'C', 'D') },
{ AV_CODEC_ID_ZMBV, MKTAG('Z', 'M', 'B', 'V') },
{ AV_CODEC_ID_KMVC, MKTAG('K', 'M', 'V', 'C') },
{ AV_CODEC_ID_CAVS, MKTAG('C', 'A', 'V', 'S') },
{ AV_CODEC_ID_JPEG2000, MKTAG('m', 'j', 'p', '2') },
{ AV_CODEC_ID_JPEG2000, MKTAG('M', 'J', '2', 'C') },
{ AV_CODEC_ID_JPEG2000, MKTAG('L', 'J', '2', 'C') },
{ AV_CODEC_ID_JPEG2000, MKTAG('L', 'J', '2', 'K') },
{ AV_CODEC_ID_JPEG2000, MKTAG('I', 'P', 'J', '2') },
{ AV_CODEC_ID_VMNC, MKTAG('V', 'M', 'n', 'c') },
{ AV_CODEC_ID_TARGA, MKTAG('t', 'g', 'a', ' ') },
{ AV_CODEC_ID_PNG, MKTAG('M', 'P', 'N', 'G') },
{ AV_CODEC_ID_PNG, MKTAG('P', 'N', 'G', '1') },
{ AV_CODEC_ID_CLJR, MKTAG('C', 'L', 'J', 'R') },
{ AV_CODEC_ID_DIRAC, MKTAG('d', 'r', 'a', 'c') },
{ AV_CODEC_ID_RPZA, MKTAG('a', 'z', 'p', 'r') },
{ AV_CODEC_ID_RPZA, MKTAG('R', 'P', 'Z', 'A') },
{ AV_CODEC_ID_RPZA, MKTAG('r', 'p', 'z', 'a') },
{ AV_CODEC_ID_SP5X, MKTAG('S', 'P', '5', '4') },
{ AV_CODEC_ID_AURA, MKTAG('A', 'U', 'R', 'A') },
{ AV_CODEC_ID_AURA2, MKTAG('A', 'U', 'R', '2') },
{ AV_CODEC_ID_DPX, MKTAG('d', 'p', 'x', ' ') },
{ AV_CODEC_ID_KGV1, MKTAG('K', 'G', 'V', '1') },
{ AV_CODEC_ID_LAGARITH, MKTAG('L', 'A', 'G', 'S') },
{ AV_CODEC_ID_G2M, MKTAG('G', '2', 'M', '2') },
{ AV_CODEC_ID_G2M, MKTAG('G', '2', 'M', '3') },
{ AV_CODEC_ID_G2M, MKTAG('G', '2', 'M', '4') },
{ AV_CODEC_ID_AMV, MKTAG('A', 'M', 'V', 'F') },
{ AV_CODEC_ID_UTVIDEO, MKTAG('U', 'L', 'R', 'A') },
{ AV_CODEC_ID_UTVIDEO, MKTAG('U', 'L', 'R', 'G') },
{ AV_CODEC_ID_UTVIDEO, MKTAG('U', 'L', 'Y', '0') },
{ AV_CODEC_ID_UTVIDEO, MKTAG('U', 'L', 'Y', '2') },
{ AV_CODEC_ID_VBLE, MKTAG('V', 'B', 'L', 'E') },
{ AV_CODEC_ID_ESCAPE130, MKTAG('E', '1', '3', '0') },
{ AV_CODEC_ID_DXTORY, MKTAG('x', 't', 'o', 'r') },
{ AV_CODEC_ID_ZEROCODEC, MKTAG('Z', 'E', 'C', 'O') },
{ AV_CODEC_ID_Y41P, MKTAG('Y', '4', '1', 'P') },
{ AV_CODEC_ID_FLIC, MKTAG('A', 'F', 'L', 'C') },
{ AV_CODEC_ID_EXR, MKTAG('e', 'x', 'r', ' ') },
{ AV_CODEC_ID_MSS1, MKTAG('M', 'S', 'S', '1') },
{ AV_CODEC_ID_MSA1, MKTAG('M', 'S', 'A', '1') },
{ AV_CODEC_ID_TSCC2, MKTAG('T', 'S', 'C', '2') },
{ AV_CODEC_ID_MTS2, MKTAG('M', 'T', 'S', '2') },
{ AV_CODEC_ID_CLLC, MKTAG('C', 'L', 'L', 'C') },
{ AV_CODEC_ID_MSS2, MKTAG('M', 'S', 'S', '2') },
{ AV_CODEC_ID_SVQ3, MKTAG('S', 'V', 'Q', '3') },
{ AV_CODEC_ID_012V, MKTAG('0', '1', '2', 'v') },
{ AV_CODEC_ID_012V, MKTAG('a', '1', '2', 'v') },
{ AV_CODEC_ID_NONE, 0 }
};
const AVCodecTag ff_codec_wav_tags[] = {
{ AV_CODEC_ID_PCM_S16LE, 0x0001 },
{ AV_CODEC_ID_PCM_U8, 0x0001 }, /* must come after s16le in this list */
{ AV_CODEC_ID_PCM_S24LE, 0x0001 },
{ AV_CODEC_ID_PCM_S32LE, 0x0001 },
{ AV_CODEC_ID_ADPCM_MS, 0x0002 },
{ AV_CODEC_ID_PCM_F32LE, 0x0003 },
{ AV_CODEC_ID_PCM_F64LE, 0x0003 }, /* must come after f32le in this list */
{ AV_CODEC_ID_PCM_ALAW, 0x0006 },
{ AV_CODEC_ID_PCM_MULAW, 0x0007 },
{ AV_CODEC_ID_WMAVOICE, 0x000A },
{ AV_CODEC_ID_ADPCM_IMA_OKI, 0x0010 },
{ AV_CODEC_ID_ADPCM_IMA_WAV, 0x0011 },
{ AV_CODEC_ID_PCM_ZORK, 0x0011 }, /* must come after adpcm_ima_wav in this list */
{ AV_CODEC_ID_ADPCM_IMA_OKI, 0x0017 },
{ AV_CODEC_ID_ADPCM_YAMAHA, 0x0020 },
{ AV_CODEC_ID_TRUESPEECH, 0x0022 },
{ AV_CODEC_ID_GSM_MS, 0x0031 },
{ AV_CODEC_ID_AMR_NB, 0x0038 }, /* rogue format number */
{ AV_CODEC_ID_G723_1, 0x0042 },
{ AV_CODEC_ID_ADPCM_G726, 0x0045 },
{ AV_CODEC_ID_MP2, 0x0050 },
{ AV_CODEC_ID_MP3, 0x0055 },
{ AV_CODEC_ID_AMR_NB, 0x0057 },
{ AV_CODEC_ID_AMR_WB, 0x0058 },
{ AV_CODEC_ID_ADPCM_IMA_DK4, 0x0061 }, /* rogue format number */
{ AV_CODEC_ID_ADPCM_IMA_DK3, 0x0062 }, /* rogue format number */
{ AV_CODEC_ID_ADPCM_IMA_WAV, 0x0069 },
{ AV_CODEC_ID_VOXWARE, 0x0075 },
{ AV_CODEC_ID_AAC, 0x00ff },
{ AV_CODEC_ID_SIPR, 0x0130 },
{ AV_CODEC_ID_WMAV1, 0x0160 },
{ AV_CODEC_ID_WMAV2, 0x0161 },
{ AV_CODEC_ID_WMAPRO, 0x0162 },
{ AV_CODEC_ID_WMALOSSLESS, 0x0163 },
{ AV_CODEC_ID_ADPCM_CT, 0x0200 },
{ AV_CODEC_ID_ATRAC3, 0x0270 },
{ AV_CODEC_ID_ADPCM_G722, 0x028F },
{ AV_CODEC_ID_IMC, 0x0401 },
{ AV_CODEC_ID_IAC, 0x0402 },
{ AV_CODEC_ID_GSM_MS, 0x1500 },
{ AV_CODEC_ID_TRUESPEECH, 0x1501 },
{ AV_CODEC_ID_AAC, 0x1600 }, /* ADTS AAC */
{ AV_CODEC_ID_AAC_LATM, 0x1602 },
{ AV_CODEC_ID_AC3, 0x2000 },
{ AV_CODEC_ID_DTS, 0x2001 },
{ AV_CODEC_ID_SONIC, 0x2048 },
{ AV_CODEC_ID_SONIC_LS, 0x2048 },
{ AV_CODEC_ID_PCM_MULAW, 0x6c75 },
{ AV_CODEC_ID_AAC, 0x706d },
{ AV_CODEC_ID_AAC, 0x4143 },
{ AV_CODEC_ID_G723_1, 0xA100 },
{ AV_CODEC_ID_AAC, 0xA106 },
{ AV_CODEC_ID_SPEEX, 0xA109 },
{ AV_CODEC_ID_FLAC, 0xF1AC },
{ AV_CODEC_ID_ADPCM_SWF, ('S'<<8)+'F' },
{ AV_CODEC_ID_VORBIS, ('V'<<8)+'o' }, //HACK/FIXME, does vorbis in WAV/AVI have an (in)official id?
{ AV_CODEC_ID_NONE, 0 },
};
const AVCodecGuid ff_codec_wav_guids[] = {
{AV_CODEC_ID_AC3, {0x2C,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
{AV_CODEC_ID_ATRAC3P, {0xBF,0xAA,0x23,0xE9,0x58,0xCB,0x71,0x44,0xA1,0x19,0xFF,0xFA,0x01,0xE4,0xCE,0x62}},
{AV_CODEC_ID_EAC3, {0xAF,0x87,0xFB,0xA7,0x02,0x2D,0xFB,0x42,0xA4,0xD4,0x05,0xCD,0x93,0x84,0x3B,0xDD}},
{AV_CODEC_ID_MP2, {0x2B,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
{AV_CODEC_ID_NONE}
};
const AVMetadataConv ff_riff_info_conv[] = {
{ "IART", "artist" },
{ "ICMT", "comment" },
{ "ICOP", "copyright" },
{ "ICRD", "date" },
{ "IGNR", "genre" },
{ "ILNG", "language" },
{ "INAM", "title" },
{ "IPRD", "album" },
{ "IPRT", "track" },
{ "ISFT", "encoder" },
{ "ISMP", "timecode" },
{ "ITCH", "encoded_by"},
{ 0 },
};
#if CONFIG_MUXERS
int64_t ff_start_tag(AVIOContext *pb, const char *tag)
{
ffio_wfourcc(pb, tag);
avio_wl32(pb, 0);
return avio_tell(pb);
}
void ff_end_tag(AVIOContext *pb, int64_t start)
{
int64_t pos;
av_assert0((start&1) == 0);
pos = avio_tell(pb);
if (pos & 1)
avio_w8(pb, 0);
avio_seek(pb, start - 4, SEEK_SET);
avio_wl32(pb, (uint32_t)(pos - start));
avio_seek(pb, FFALIGN(pos, 2), SEEK_SET);
}
/* WAVEFORMATEX header */
/* returns the size or -1 on error */
int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc)
{
int bps, blkalign, bytespersec, frame_size;
int hdrsize = 18;
int waveformatextensible;
uint8_t temp[256];
uint8_t *riff_extradata= temp;
uint8_t *riff_extradata_start= temp;
if(!enc->codec_tag || enc->codec_tag > 0xffff)
return -1;
/* We use the known constant frame size for the codec if known, otherwise
fallback to using AVCodecContext.frame_size, which is not as reliable
for indicating packet duration */
frame_size = av_get_audio_frame_duration(enc, 0);
if (!frame_size)
frame_size = enc->frame_size;
waveformatextensible = (enc->channels > 2 && enc->channel_layout)
|| enc->sample_rate > 48000
|| av_get_bits_per_sample(enc->codec_id) > 16;
if (waveformatextensible) {
avio_wl16(pb, 0xfffe);
} else {
avio_wl16(pb, enc->codec_tag);
}
avio_wl16(pb, enc->channels);
avio_wl32(pb, enc->sample_rate);
if (enc->codec_id == AV_CODEC_ID_ATRAC3 ||
enc->codec_id == AV_CODEC_ID_G723_1 ||
enc->codec_id == AV_CODEC_ID_GSM_MS ||
enc->codec_id == AV_CODEC_ID_MP2 ||
enc->codec_id == AV_CODEC_ID_MP3) {
bps = 0;
} else {
if (!(bps = av_get_bits_per_sample(enc->codec_id))) {
if (enc->bits_per_coded_sample)
bps = enc->bits_per_coded_sample;
else
bps = 16; // default to 16
}
}
if(bps != enc->bits_per_coded_sample && enc->bits_per_coded_sample){
av_log(enc, AV_LOG_WARNING, "requested bits_per_coded_sample (%d) and actually stored (%d) differ\n", enc->bits_per_coded_sample, bps);
}
if (enc->codec_id == AV_CODEC_ID_MP2 || enc->codec_id == AV_CODEC_ID_MP3) {
/* this is wrong, but it seems many demuxers do not work if this is set
correctly */
blkalign = frame_size;
//blkalign = 144 * enc->bit_rate/enc->sample_rate;
} else if (enc->codec_id == AV_CODEC_ID_AC3) {
blkalign = 3840; //maximum bytes per frame
} else if (enc->codec_id == AV_CODEC_ID_AAC) {
blkalign = 768 * enc->channels; //maximum bytes per frame
} else if (enc->codec_id == AV_CODEC_ID_G723_1) {
blkalign = 24;
} else if (enc->block_align != 0) { /* specified by the codec */
blkalign = enc->block_align;
} else
blkalign = bps * enc->channels / av_gcd(8, bps);
if (enc->codec_id == AV_CODEC_ID_PCM_U8 ||
enc->codec_id == AV_CODEC_ID_PCM_S24LE ||
enc->codec_id == AV_CODEC_ID_PCM_S32LE ||
enc->codec_id == AV_CODEC_ID_PCM_F32LE ||
enc->codec_id == AV_CODEC_ID_PCM_F64LE ||
enc->codec_id == AV_CODEC_ID_PCM_S16LE) {
bytespersec = enc->sample_rate * blkalign;
} else if (enc->codec_id == AV_CODEC_ID_G723_1) {
bytespersec = 800;
} else {
bytespersec = enc->bit_rate / 8;
}
avio_wl32(pb, bytespersec); /* bytes per second */
avio_wl16(pb, blkalign); /* block align */
avio_wl16(pb, bps); /* bits per sample */
if (enc->codec_id == AV_CODEC_ID_MP3) {
hdrsize += 12;
bytestream_put_le16(&riff_extradata, 1); /* wID */
bytestream_put_le32(&riff_extradata, 2); /* fdwFlags */
bytestream_put_le16(&riff_extradata, 1152); /* nBlockSize */
bytestream_put_le16(&riff_extradata, 1); /* nFramesPerBlock */
bytestream_put_le16(&riff_extradata, 1393); /* nCodecDelay */
} else if (enc->codec_id == AV_CODEC_ID_MP2) {
hdrsize += 22;
bytestream_put_le16(&riff_extradata, 2); /* fwHeadLayer */
bytestream_put_le32(&riff_extradata, enc->bit_rate); /* dwHeadBitrate */
bytestream_put_le16(&riff_extradata, enc->channels == 2 ? 1 : 8); /* fwHeadMode */
bytestream_put_le16(&riff_extradata, 0); /* fwHeadModeExt */
bytestream_put_le16(&riff_extradata, 1); /* wHeadEmphasis */
bytestream_put_le16(&riff_extradata, 16); /* fwHeadFlags */
bytestream_put_le32(&riff_extradata, 0); /* dwPTSLow */
bytestream_put_le32(&riff_extradata, 0); /* dwPTSHigh */
} else if (enc->codec_id == AV_CODEC_ID_G723_1) {
hdrsize += 20;
bytestream_put_le32(&riff_extradata, 0x9ace0002); /* extradata needed for msacm g723.1 codec */
bytestream_put_le32(&riff_extradata, 0xaea2f732);
bytestream_put_le16(&riff_extradata, 0xacde);
} else if (enc->codec_id == AV_CODEC_ID_GSM_MS || enc->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {
hdrsize += 2;
bytestream_put_le16(&riff_extradata, frame_size); /* wSamplesPerBlock */
} else if(enc->extradata_size){
riff_extradata_start= enc->extradata;
riff_extradata= enc->extradata + enc->extradata_size;
hdrsize += enc->extradata_size;
}
if(waveformatextensible) { /* write WAVEFORMATEXTENSIBLE extensions */
hdrsize += 22;
avio_wl16(pb, riff_extradata - riff_extradata_start + 22); /* 22 is WAVEFORMATEXTENSIBLE size */
avio_wl16(pb, bps); /* ValidBitsPerSample || SamplesPerBlock || Reserved */
avio_wl32(pb, enc->channel_layout); /* dwChannelMask */
avio_wl32(pb, enc->codec_tag); /* GUID + next 3 */
avio_wl32(pb, 0x00100000);
avio_wl32(pb, 0xAA000080);
avio_wl32(pb, 0x719B3800);
} else {
avio_wl16(pb, riff_extradata - riff_extradata_start); /* cbSize */
}
avio_write(pb, riff_extradata_start, riff_extradata - riff_extradata_start);
if(hdrsize&1){
hdrsize++;
avio_w8(pb, 0);
}
return hdrsize;
}
/* BITMAPINFOHEADER header */
void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf)
{
avio_wl32(pb, 40 + enc->extradata_size); /* size */
avio_wl32(pb, enc->width);
//We always store RGB TopDown
avio_wl32(pb, enc->codec_tag ? enc->height : -enc->height);
avio_wl16(pb, 1); /* planes */
avio_wl16(pb, enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24); /* depth */
/* compression type */
avio_wl32(pb, enc->codec_tag);
avio_wl32(pb, (enc->width * enc->height * (enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24)+7) / 8);
avio_wl32(pb, 0);
avio_wl32(pb, 0);
avio_wl32(pb, 0);
avio_wl32(pb, 0);
avio_write(pb, enc->extradata, enc->extradata_size);
if (!for_asf && enc->extradata_size & 1)
avio_w8(pb, 0);
}
void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale)
{
int gcd;
int audio_frame_size;
/* We use the known constant frame size for the codec if known, otherwise
fallback to using AVCodecContext.frame_size, which is not as reliable
for indicating packet duration */
audio_frame_size = av_get_audio_frame_duration(stream, 0);
if (!audio_frame_size)
audio_frame_size = stream->frame_size;
*au_ssize= stream->block_align;
if (audio_frame_size && stream->sample_rate) {
*au_scale = audio_frame_size;
*au_rate= stream->sample_rate;
}else if(stream->codec_type == AVMEDIA_TYPE_VIDEO ||
stream->codec_type == AVMEDIA_TYPE_DATA ||
stream->codec_type == AVMEDIA_TYPE_SUBTITLE){
*au_scale= stream->time_base.num;
*au_rate = stream->time_base.den;
}else{
*au_scale= stream->block_align ? stream->block_align*8 : 8;
*au_rate = stream->bit_rate ? stream->bit_rate : 8*stream->sample_rate;
}
gcd= av_gcd(*au_scale, *au_rate);
*au_scale /= gcd;
*au_rate /= gcd;
}
void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str)
{
int len = strlen(str);
if (len > 0) {
len++;
ffio_wfourcc(pb, tag);
avio_wl32(pb, len);
avio_put_str(pb, str);
if (len & 1)
avio_w8(pb, 0);
}
}
static const char riff_tags[][5] = {
"IARL", "IART", "ICMS", "ICMT", "ICOP", "ICRD", "ICRP", "IDIM", "IDPI",
"IENG", "IGNR", "IKEY", "ILGT", "ILNG", "IMED", "INAM", "IPLT", "IPRD",
"IPRT", "ISBJ", "ISFT", "ISHP", "ISMP", "ISRC", "ISRF", "ITCH",
{0}
};
static int riff_has_valid_tags(AVFormatContext *s)
{
int i;
for (i = 0; *riff_tags[i]; i++) {
if (av_dict_get(s->metadata, riff_tags[i], NULL, AV_DICT_MATCH_CASE))
return 1;
}
return 0;
}
void ff_riff_write_info(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
int i;
int64_t list_pos;
AVDictionaryEntry *t = NULL;
ff_metadata_conv(&s->metadata, ff_riff_info_conv, NULL);
/* writing empty LIST is not nice and may cause problems */
if (!riff_has_valid_tags(s))
return;
list_pos = ff_start_tag(pb, "LIST");
ffio_wfourcc(pb, "INFO");
for (i = 0; *riff_tags[i]; i++) {
if ((t = av_dict_get(s->metadata, riff_tags[i], NULL, AV_DICT_MATCH_CASE)))
ff_riff_write_info_tag(s->pb, t->key, t->value);
}
ff_end_tag(pb, list_pos);
}
#endif //CONFIG_MUXERS
#if CONFIG_DEMUXERS
/* We could be given one of the three possible structures here:
* WAVEFORMAT, PCMWAVEFORMAT or WAVEFORMATEX. Each structure
* is an expansion of the previous one with the fields added
* at the bottom. PCMWAVEFORMAT adds 'WORD wBitsPerSample' and
* WAVEFORMATEX adds 'WORD cbSize' and basically makes itself
* an openended structure.
*/
int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size)
{
int id;
id = avio_rl16(pb);
codec->codec_type = AVMEDIA_TYPE_AUDIO;
codec->channels = avio_rl16(pb);
codec->sample_rate = avio_rl32(pb);
codec->bit_rate = avio_rl32(pb) * 8;
codec->block_align = avio_rl16(pb);
if (size == 14) { /* We're dealing with plain vanilla WAVEFORMAT */
codec->bits_per_coded_sample = 8;
}else
codec->bits_per_coded_sample = avio_rl16(pb);
if (id == 0xFFFE) {
codec->codec_tag = 0;
} else {
codec->codec_tag = id;
codec->codec_id = ff_wav_codec_get_id(id, codec->bits_per_coded_sample);
}
if (size >= 18) { /* We're obviously dealing with WAVEFORMATEX */
int cbSize = avio_rl16(pb); /* cbSize */
size -= 18;
cbSize = FFMIN(size, cbSize);
if (cbSize >= 22 && id == 0xfffe) { /* WAVEFORMATEXTENSIBLE */
ff_asf_guid subformat;
int bps = avio_rl16(pb);
if (bps)
codec->bits_per_coded_sample = bps;
codec->channel_layout = avio_rl32(pb); /* dwChannelMask */
ff_get_guid(pb, &subformat);
if (!memcmp(subformat + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
codec->codec_tag = AV_RL32(subformat);
codec->codec_id = ff_wav_codec_get_id(codec->codec_tag, codec->bits_per_coded_sample);
} else {
codec->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subformat);
if (!codec->codec_id)
av_log(codec, AV_LOG_WARNING, "unknown subformat:"FF_PRI_GUID"\n", FF_ARG_GUID(subformat));
}
cbSize -= 22;
size -= 22;
}
codec->extradata_size = cbSize;
if (cbSize > 0) {
av_free(codec->extradata);
codec->extradata = av_mallocz(codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
if (!codec->extradata)
return AVERROR(ENOMEM);
avio_read(pb, codec->extradata, codec->extradata_size);
size -= cbSize;
}
/* It is possible for the chunk to contain garbage at the end */
if (size > 0)
avio_skip(pb, size);
}
if (codec->codec_id == AV_CODEC_ID_AAC_LATM) {
/* channels and sample_rate values are those prior to applying SBR and/or PS */
codec->channels = 0;
codec->sample_rate = 0;
}
/* override bits_per_coded_sample for G.726 */
if (codec->codec_id == AV_CODEC_ID_ADPCM_G726 && codec->sample_rate)
codec->bits_per_coded_sample = codec->bit_rate / codec->sample_rate;
return 0;
}
enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps)
{
enum AVCodecID id;
id = ff_codec_get_id(ff_codec_wav_tags, tag);
if (id <= 0)
return id;
if (id == AV_CODEC_ID_PCM_S16LE)
id = ff_get_pcm_codec_id(bps, 0, 0, ~1);
else if (id == AV_CODEC_ID_PCM_F32LE)
id = ff_get_pcm_codec_id(bps, 1, 0, 0);
if (id == AV_CODEC_ID_ADPCM_IMA_WAV && bps == 8)
id = AV_CODEC_ID_PCM_ZORK;
return id;
}
int ff_get_bmp_header(AVIOContext *pb, AVStream *st, unsigned *esize)
{
int tag1;
if(esize) *esize = avio_rl32(pb);
else avio_rl32(pb);
st->codec->width = avio_rl32(pb);
st->codec->height = (int32_t)avio_rl32(pb);
avio_rl16(pb); /* planes */
st->codec->bits_per_coded_sample= avio_rl16(pb); /* depth */
tag1 = avio_rl32(pb);
avio_rl32(pb); /* ImageSize */
avio_rl32(pb); /* XPelsPerMeter */
avio_rl32(pb); /* YPelsPerMeter */
avio_rl32(pb); /* ClrUsed */
avio_rl32(pb); /* ClrImportant */
return tag1;
}
void ff_get_guid(AVIOContext *s, ff_asf_guid *g)
{
av_assert0(sizeof(*g) == 16); //compiler will optimize this out
if (avio_read(s, *g, sizeof(*g)) < (int)sizeof(*g))
memset(*g, 0, sizeof(*g));
}
enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
{
int i;
for (i = 0; guids[i].id != AV_CODEC_ID_NONE; i++) {
if (!ff_guidcmp(guids[i].guid, guid))
return guids[i].id;
}
return AV_CODEC_ID_NONE;
}
int ff_read_riff_info(AVFormatContext *s, int64_t size)
{
int64_t start, end, cur;
AVIOContext *pb = s->pb;
start = avio_tell(pb);
end = start + size;
while ((cur = avio_tell(pb)) >= 0 && cur <= end - 8 /* = tag + size */) {
uint32_t chunk_code;
int64_t chunk_size;
char key[5] = {0};
char *value;
chunk_code = avio_rl32(pb);
chunk_size = avio_rl32(pb);
if (url_feof(pb)) {
if (chunk_code || chunk_size) {
av_log(s, AV_LOG_WARNING, "INFO subchunk truncated\n");
return AVERROR_INVALIDDATA;
}
break;
}
if (chunk_size > end || end - chunk_size < cur || chunk_size == UINT_MAX) {
avio_seek(pb, -9, SEEK_CUR);
chunk_code = avio_rl32(pb);
chunk_size = avio_rl32(pb);
if (chunk_size > end || end - chunk_size < cur || chunk_size == UINT_MAX) {
av_log(s, AV_LOG_WARNING, "too big INFO subchunk\n");
return AVERROR_INVALIDDATA;
}
}
chunk_size += (chunk_size & 1);
if (!chunk_code) {
if (chunk_size)
avio_skip(pb, chunk_size);
continue;
}
value = av_mallocz(chunk_size + 1);
if (!value) {
av_log(s, AV_LOG_ERROR, "out of memory, unable to read INFO tag\n");
return AVERROR(ENOMEM);
}
AV_WL32(key, chunk_code);
if (avio_read(pb, value, chunk_size) != chunk_size) {
av_log(s, AV_LOG_WARNING, "premature end of file while reading INFO tag\n");
}
av_dict_set(&s->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
}
return 0;
}
#endif // CONFIG_DEMUXERS
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