ffmpeg / libavformat / mov.c @ 5509bffa
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/*
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* MOV decoder.
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* Copyright (c) 2001 Fabrice Bellard.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <limits.h> |
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#include "avformat.h" |
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#include "avi.h" |
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#ifdef CONFIG_ZLIB
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#include <zlib.h> |
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#endif
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/*
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* First version by Francois Revol revol@free.fr
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* Seek function by Gael Chardon gael.dev@4now.net
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*
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* Features and limitations:
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* - reads most of the QT files I have (at least the structure),
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* the exceptions are .mov with zlib compressed headers ('cmov' section). It shouldn't be hard to implement.
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* FIXED, Francois Revol, 07/17/2002
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* - ffmpeg has nearly none of the usual QuickTime codecs,
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* although I succesfully dumped raw and mp3 audio tracks off .mov files.
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* Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
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* - .mp4 parsing is still hazardous, although the format really is QuickTime with some minor changes
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* (to make .mov parser crash maybe ?), despite what they say in the MPEG FAQ at
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* http://mpeg.telecomitalialab.com/faq.htm
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* - the code is quite ugly... maybe I won't do it recursive next time :-)
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* - seek is not supported with files that contain edit list
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*
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* Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
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* when coding this :) (it's a writer anyway)
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*
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* Reference documents:
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* http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
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* Apple:
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* http://developer.apple.com/documentation/QuickTime/QTFF/
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* http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
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* QuickTime is a trademark of Apple (AFAIK :))
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*/
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//#define DEBUG
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#ifdef DEBUG
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#include <stdio.h> |
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#include <fcntl.h> |
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#endif
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#include "qtpalette.h" |
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/* Allows seeking (MOV_SPLIT_CHUNKS should also be defined) */
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#define MOV_SEEK
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/* allows chunk splitting - should work now... */
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/* in case you can't read a file, try commenting */
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#define MOV_SPLIT_CHUNKS
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/* Special handling for movies created with Minolta Dimaxe Xi*/
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/* this fix should not interfere with other .mov files, but just in case*/
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#define MOV_MINOLTA_FIX
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/* some streams in QT (and in MP4 mostly) aren't either video nor audio */
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/* so we first list them as this, then clean up the list of streams we give back, */
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/* getting rid of these */
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#define CODEC_TYPE_MOV_OTHER (enum CodecType) 2 |
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static const CodecTag mov_video_tags[] = { |
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/* { CODEC_ID_, MKTAG('c', 'v', 'i', 'd') }, *//* Cinepak */ |
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/* { CODEC_ID_H263, MKTAG('r', 'a', 'w', ' ') }, *//* Uncompressed RGB */ |
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/* { CODEC_ID_H263, MKTAG('Y', 'u', 'v', '2') }, *//* Uncompressed YUV422 */ |
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/* { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'U', 'I') }, *//* YUV with alpha-channel (AVID Uncompressed) */ |
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/* Graphics */
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/* Animation */
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/* Apple video */
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/* Kodak Photo CD */
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{ CODEC_ID_MJPEG, MKTAG('j', 'p', 'e', 'g') }, /* PhotoJPEG */
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{ CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'e', 'g') }, /* MPEG */
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{ CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'a') }, /* Motion-JPEG (format A) */
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{ CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'b') }, /* Motion-JPEG (format B) */
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{ CODEC_ID_MJPEG, MKTAG('A', 'V', 'D', 'J') }, /* MJPEG with alpha-channel (AVID JFIF meridien compressed) */
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/* { CODEC_ID_MJPEG, MKTAG('A', 'V', 'R', 'n') }, *//* MJPEG with alpha-channel (AVID ABVB/Truevision NuVista) */ |
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/* { CODEC_ID_GIF, MKTAG('g', 'i', 'f', ' ') }, *//* embedded gif files as frames (usually one "click to play movie" frame) */ |
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/* Sorenson video */
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{ CODEC_ID_SVQ1, MKTAG('S', 'V', 'Q', '1') }, /* Sorenson Video v1 */
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{ CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') }, /* Sorenson Video v1 */
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{ CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', 'i') }, /* Sorenson Video v1 (from QT specs)*/
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{ CODEC_ID_SVQ3, MKTAG('S', 'V', 'Q', '3') }, /* Sorenson Video v3 */
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{ CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
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{ CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') }, /* OpenDiVX *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */
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{ CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
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{ CODEC_ID_MPEG4, MKTAG('3', 'I', 'V', '2') }, /* experimental: 3IVX files before ivx D4 4.5.1 */
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/* { CODEC_ID_, MKTAG('I', 'V', '5', '0') }, *//* Indeo 5.0 */ |
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{ CODEC_ID_H263, MKTAG('h', '2', '6', '3') }, /* H263 */
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{ CODEC_ID_H263, MKTAG('s', '2', '6', '3') }, /* H263 ?? works */
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{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') }, /* DV NTSC */
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{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 'p') }, /* DV PAL */
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/* { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', 'v') }, *//* AVID dv */ |
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{ CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') }, /* On2 VP3 */
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{ CODEC_ID_RPZA, MKTAG('r', 'p', 'z', 'a') }, /* Apple Video (RPZA) */
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{ CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') }, /* Cinepak */
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{ CODEC_ID_8BPS, MKTAG('8', 'B', 'P', 'S') }, /* Planar RGB (8BPS) */
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{ CODEC_ID_SMC, MKTAG('s', 'm', 'c', ' ') }, /* Apple Graphics (SMC) */
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{ CODEC_ID_QTRLE, MKTAG('r', 'l', 'e', ' ') }, /* Apple Animation (RLE) */
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{ CODEC_ID_QDRAW, MKTAG('q', 'd', 'r', 'w') }, /* QuickDraw */
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{ CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') }, /* AVC-1/H.264 */
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{ CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '2') }, /* MPEG2 produced by Sony HD camera */
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{ CODEC_ID_NONE, 0 },
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}; |
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static const CodecTag mov_audio_tags[] = { |
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/* { CODEC_ID_PCM_S16BE, MKTAG('N', 'O', 'N', 'E') }, *//* uncompressed */ |
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{ CODEC_ID_PCM_S16BE, MKTAG('t', 'w', 'o', 's') }, /* 16 bits */
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/* { CODEC_ID_PCM_S8, MKTAG('t', 'w', 'o', 's') },*/ /* 8 bits */ |
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{ CODEC_ID_PCM_U8, MKTAG('r', 'a', 'w', ' ') }, /* 8 bits unsigned */
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{ CODEC_ID_PCM_S16LE, MKTAG('s', 'o', 'w', 't') }, /* */
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{ CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') }, /* */
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{ CODEC_ID_PCM_ALAW, MKTAG('a', 'l', 'a', 'w') }, /* */
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{ CODEC_ID_ADPCM_IMA_QT, MKTAG('i', 'm', 'a', '4') }, /* IMA-4 ADPCM */
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{ CODEC_ID_MACE3, MKTAG('M', 'A', 'C', '3') }, /* Macintosh Audio Compression and Expansion 3:1 */
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{ CODEC_ID_MACE6, MKTAG('M', 'A', 'C', '6') }, /* Macintosh Audio Compression and Expansion 6:1 */
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{ CODEC_ID_MP2, MKTAG('.', 'm', 'p', '3') }, /* MPEG layer 3 */ /* sample files at http://www.3ivx.com/showcase.html use this tag */
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{ CODEC_ID_MP2, 0x6D730055 }, /* MPEG layer 3 */
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{ CODEC_ID_MP2, 0x5500736D }, /* MPEG layer 3 *//* XXX: check endianness */
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/* { CODEC_ID_OGG_VORBIS, MKTAG('O', 'g', 'g', 'S') }, *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */ |
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/* MP4 tags */
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{ CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') }, /* MPEG-4 AAC */
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/* The standard for mpeg4 audio is still not normalised AFAIK anyway */
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{ CODEC_ID_AMR_NB, MKTAG('s', 'a', 'm', 'r') }, /* AMR-NB 3gp */
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{ CODEC_ID_AMR_WB, MKTAG('s', 'a', 'w', 'b') }, /* AMR-WB 3gp */
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{ CODEC_ID_AC3, MKTAG('m', 's', 0x20, 0x00) }, /* Dolby AC-3 */
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{ CODEC_ID_ALAC,MKTAG('a', 'l', 'a', 'c') }, /* Apple Lossless */
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{ CODEC_ID_QDM2,MKTAG('Q', 'D', 'M', '2') }, /* QDM2 */
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{ CODEC_ID_NONE, 0 },
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}; |
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/* map numeric codes from mdhd atom to ISO 639 */
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/* cf. QTFileFormat.pdf p253, qtff.pdf p205 */
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/* http://developer.apple.com/documentation/mac/Text/Text-368.html */
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/* deprecated by putting the code as 3*5bit ascii */
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static const char *mov_mdhd_language_map[] = { |
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/* 0-9 */
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"eng", "fra", "ger", "ita", "dut", "sve", "spa", "dan", "por", "nor", |
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"heb", "jpn", "ara", "fin", "gre", "ice", "mlt", "tur", "hr "/*scr*/, "chi"/*ace?*/, |
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"urd", "hin", "tha", "kor", "lit", "pol", "hun", "est", "lav", NULL, |
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"fo ", NULL, "rus", "chi", NULL, "iri", "alb", "ron", "ces", "slk", |
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"slv", "yid", "sr ", "mac", "bul", "ukr", "bel", "uzb", "kaz", "aze", |
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/*?*/
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"aze", "arm", "geo", "mol", "kir", "tgk", "tuk", "mon", NULL, "pus", |
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"kur", "kas", "snd", "tib", "nep", "san", "mar", "ben", "asm", "guj", |
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"pa ", "ori", "mal", "kan", "tam", "tel", NULL, "bur", "khm", "lao", |
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/* roman? arabic? */
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"vie", "ind", "tgl", "may", "may", "amh", "tir", "orm", "som", "swa", |
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/*==rundi?*/
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NULL, "run", NULL, "mlg", "epo", NULL, NULL, NULL, NULL, NULL, |
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/* 100 */
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "wel", "baq", |
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"cat", "lat", "que", "grn", "aym", "tat", "uig", "dzo", "jav" |
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}; |
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/* the QuickTime file format is quite convoluted...
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* it has lots of index tables, each indexing something in another one...
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* Here we just use what is needed to read the chunks
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*/
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typedef struct MOV_sample_to_chunk_tbl { |
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long first;
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long count;
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long id;
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} MOV_sample_to_chunk_tbl; |
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typedef struct { |
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uint32_t type; |
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int64_t offset; |
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int64_t size; /* total size (excluding the size and type fields) */
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} MOV_atom_t; |
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typedef struct { |
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int seed;
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int flags;
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int size;
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void* clrs;
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} MOV_ctab_t; |
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typedef struct { |
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uint8_t version; |
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uint32_t flags; // 24bit
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/* 0x03 ESDescrTag */
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uint16_t es_id; |
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#define MP4ODescrTag 0x01 |
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#define MP4IODescrTag 0x02 |
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#define MP4ESDescrTag 0x03 |
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#define MP4DecConfigDescrTag 0x04 |
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#define MP4DecSpecificDescrTag 0x05 |
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#define MP4SLConfigDescrTag 0x06 |
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#define MP4ContentIdDescrTag 0x07 |
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#define MP4SupplContentIdDescrTag 0x08 |
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#define MP4IPIPtrDescrTag 0x09 |
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#define MP4IPMPPtrDescrTag 0x0A |
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#define MP4IPMPDescrTag 0x0B |
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#define MP4RegistrationDescrTag 0x0D |
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#define MP4ESIDIncDescrTag 0x0E |
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#define MP4ESIDRefDescrTag 0x0F |
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#define MP4FileIODescrTag 0x10 |
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#define MP4FileODescrTag 0x11 |
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#define MP4ExtProfileLevelDescrTag 0x13 |
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#define MP4ExtDescrTagsStart 0x80 |
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#define MP4ExtDescrTagsEnd 0xFE |
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uint8_t stream_priority; |
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/* 0x04 DecConfigDescrTag */
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uint8_t object_type_id; |
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uint8_t stream_type; |
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/* XXX: really streamType is
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* only 6bit, followed by:
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* 1bit upStream
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* 1bit reserved
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*/
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uint32_t buffer_size_db; // 24
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uint32_t max_bitrate; |
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uint32_t avg_bitrate; |
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/* 0x05 DecSpecificDescrTag */
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uint8_t decoder_cfg_len; |
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uint8_t *decoder_cfg; |
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/* 0x06 SLConfigDescrTag */
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uint8_t sl_config_len; |
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uint8_t *sl_config; |
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} MOV_esds_t; |
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struct MOVParseTableEntry;
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typedef struct Time2Sample{ |
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int count;
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int duration;
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}Time2Sample; |
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typedef struct MOVStreamContext { |
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int ffindex; /* the ffmpeg stream id */ |
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int is_ff_stream; /* Is this stream presented to ffmpeg ? i.e. is this an audio or video stream ? */ |
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long next_chunk;
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long chunk_count;
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int64_t *chunk_offsets; |
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int stts_count;
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Time2Sample *stts_data; |
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int ctts_count;
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Time2Sample *ctts_data; |
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int edit_count; /* number of 'edit' (elst atom) */ |
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long sample_to_chunk_sz;
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MOV_sample_to_chunk_tbl *sample_to_chunk; |
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long sample_to_chunk_index;
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int sample_to_time_index;
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long sample_to_time_sample;
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uint64_t sample_to_time_time; |
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int sample_to_ctime_index;
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int sample_to_ctime_sample;
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long sample_size;
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long sample_count;
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long *sample_sizes;
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long keyframe_count;
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long *keyframes;
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int time_scale;
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long current_sample;
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long left_in_chunk; /* how many samples before next chunk */ |
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MOV_esds_t esds; |
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} MOVStreamContext; |
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typedef struct MOVContext { |
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int mp4; /* set to 1 as soon as we are sure that the file is an .mp4 file (even some header parsing depends on this) */ |
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AVFormatContext *fc; |
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int time_scale;
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int duration; /* duration of the longest track */ |
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int found_moov; /* when both 'moov' and 'mdat' sections has been found */ |
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int found_mdat; /* we suppose we have enough data to read the file */ |
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int64_t mdat_size; |
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int64_t mdat_offset; |
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int ni; ///< non interleaved mode |
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int total_streams;
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/* some streams listed here aren't presented to the ffmpeg API, since they aren't either video nor audio
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* but we need the info to be able to skip data from those streams in the 'mdat' section
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*/
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MOVStreamContext *streams[MAX_STREAMS]; |
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int64_t next_chunk_offset; |
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MOVStreamContext *partial; /* != 0 : there is still to read in the current chunk */
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int ctab_size;
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MOV_ctab_t **ctab; /* color tables */
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const struct MOVParseTableEntry *parse_table; /* could be eventually used to change the table */ |
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/* NOTE: for recursion save to/ restore from local variable! */
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AVPaletteControl palette_control; |
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} MOVContext; |
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/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
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/* those functions parse an atom */
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/* return code:
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1: found what I wanted, exit
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0: continue to parse next atom
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-1: error occured, exit
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*/
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typedef int (*mov_parse_function)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom); |
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/* links atom IDs to parse functions */
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typedef struct MOVParseTableEntry { |
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uint32_t type; |
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mov_parse_function func; |
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} MOVParseTableEntry; |
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#ifdef DEBUG
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/*
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* XXX: static sux, even more in a multithreaded environment...
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* Avoid them. This is here just to help debugging.
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*/
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static int debug_indent = 0; |
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void print_atom(const char *str, MOV_atom_t atom) |
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{
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unsigned int tag, i; |
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tag = (unsigned int) atom.type; |
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i=debug_indent; |
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if(tag == 0) tag = MKTAG('N', 'U', 'L', 'L'); |
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while(i--)
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av_log(NULL, AV_LOG_DEBUG, "|"); |
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av_log(NULL, AV_LOG_DEBUG, "parse:"); |
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av_log(NULL, AV_LOG_DEBUG, " %s: tag=%c%c%c%c offset=0x%x size=0x%x\n", |
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str, tag & 0xff,
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(tag >> 8) & 0xff, |
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(tag >> 16) & 0xff, |
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(tag >> 24) & 0xff, |
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(unsigned int)atom.offset, |
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(unsigned int)atom.size); |
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assert((unsigned int)atom.size < 0x7fffffff);// catching errors |
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} |
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#else
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#define print_atom(a,b)
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#endif
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static int ff_mov_lang_to_iso639(int code, char *to) |
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{
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int i;
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/* is it the mangled iso code? */
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| 362 |
/* see http://www.geocities.com/xhelmboyx/quicktime/formats/mp4-layout.txt */
|
| 363 |
if (code > 138) { |
| 364 |
for (i = 2; i >= 0; i--) { |
| 365 |
to[i] = 0x60 + (code & 0x1f); |
| 366 |
code >>= 5;
|
| 367 |
} |
| 368 |
return 1; |
| 369 |
} |
| 370 |
/* old fashion apple lang code */
|
| 371 |
if (code >= (sizeof(mov_mdhd_language_map)/sizeof(char *))) |
| 372 |
return 0; |
| 373 |
if (!mov_mdhd_language_map[code])
|
| 374 |
return 0; |
| 375 |
strncpy(to, mov_mdhd_language_map[code], 4);
|
| 376 |
return 1; |
| 377 |
} |
| 378 |
|
| 379 |
extern int ff_mov_iso639_to_lang(const char *lang, int mp4); /* for movenc.c */ |
| 380 |
int ff_mov_iso639_to_lang(const char *lang, int mp4) |
| 381 |
{
|
| 382 |
int i, code = 0; |
| 383 |
|
| 384 |
/* old way, only for QT? */
|
| 385 |
for (i = 0; !mp4 && (i < (sizeof(mov_mdhd_language_map)/sizeof(char *))); i++) { |
| 386 |
if (mov_mdhd_language_map[i] && !strcmp(lang, mov_mdhd_language_map[i]))
|
| 387 |
return i;
|
| 388 |
} |
| 389 |
/* XXX:can we do that in mov too? */
|
| 390 |
if (!mp4)
|
| 391 |
return 0; |
| 392 |
/* handle undefined as such */
|
| 393 |
if (lang[0] == '\0') |
| 394 |
lang = "und";
|
| 395 |
/* 5bit ascii */
|
| 396 |
for (i = 0; i < 3; i++) { |
| 397 |
unsigned char c = (unsigned char)lang[i]; |
| 398 |
if (c < 0x60) |
| 399 |
return 0; |
| 400 |
if (c > 0x60 + 0x1f) |
| 401 |
return 0; |
| 402 |
code <<= 5;
|
| 403 |
code |= (c - 0x60);
|
| 404 |
} |
| 405 |
return code;
|
| 406 |
} |
| 407 |
|
| 408 |
static int mov_read_leaf(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 409 |
{
|
| 410 |
print_atom("leaf", atom);
|
| 411 |
|
| 412 |
if (atom.size>1) |
| 413 |
url_fskip(pb, atom.size); |
| 414 |
/* url_seek(pb, atom_offset+atom.size, SEEK_SET); */
|
| 415 |
return 0; |
| 416 |
} |
| 417 |
|
| 418 |
static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 419 |
{
|
| 420 |
int64_t total_size = 0;
|
| 421 |
MOV_atom_t a; |
| 422 |
int i;
|
| 423 |
int err = 0; |
| 424 |
|
| 425 |
#ifdef DEBUG
|
| 426 |
print_atom("default", atom);
|
| 427 |
debug_indent++; |
| 428 |
#endif
|
| 429 |
|
| 430 |
a.offset = atom.offset; |
| 431 |
|
| 432 |
if (atom.size < 0) |
| 433 |
atom.size = 0x7fffffffffffffffLL;
|
| 434 |
while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) { |
| 435 |
a.size = atom.size; |
| 436 |
a.type=0L;
|
| 437 |
if(atom.size >= 8) { |
| 438 |
a.size = get_be32(pb); |
| 439 |
a.type = get_le32(pb); |
| 440 |
} |
| 441 |
total_size += 8;
|
| 442 |
a.offset += 8;
|
| 443 |
//av_log(NULL, AV_LOG_DEBUG, "type: %08x %.4s sz: %Lx %Lx %Lx\n", type, (char*)&type, size, atom.size, total_size);
|
| 444 |
if (a.size == 1) { /* 64 bit extended size */ |
| 445 |
a.size = get_be64(pb) - 8;
|
| 446 |
a.offset += 8;
|
| 447 |
total_size += 8;
|
| 448 |
} |
| 449 |
if (a.size == 0) { |
| 450 |
a.size = atom.size - total_size; |
| 451 |
if (a.size <= 8) |
| 452 |
break;
|
| 453 |
} |
| 454 |
for (i = 0; c->parse_table[i].type != 0L |
| 455 |
&& c->parse_table[i].type != a.type; i++) |
| 456 |
/* empty */;
|
| 457 |
|
| 458 |
a.size -= 8;
|
| 459 |
|
| 460 |
if(a.size < 0) |
| 461 |
break;
|
| 462 |
|
| 463 |
// av_log(NULL, AV_LOG_DEBUG, " i=%ld\n", i);
|
| 464 |
if (c->parse_table[i].type == 0) { /* skip leaf atoms data */ |
| 465 |
// url_seek(pb, atom.offset+atom.size, SEEK_SET);
|
| 466 |
#ifdef DEBUG
|
| 467 |
print_atom("unknown", a);
|
| 468 |
#endif
|
| 469 |
url_fskip(pb, a.size); |
| 470 |
} else {
|
| 471 |
#ifdef DEBUG
|
| 472 |
//char b[5] = { type & 0xff, (type >> 8) & 0xff, (type >> 16) & 0xff, (type >> 24) & 0xff, 0 };
|
| 473 |
//print_atom(b, type, offset, size);
|
| 474 |
#endif
|
| 475 |
err = (c->parse_table[i].func)(c, pb, a); |
| 476 |
} |
| 477 |
|
| 478 |
a.offset += a.size; |
| 479 |
total_size += a.size; |
| 480 |
} |
| 481 |
|
| 482 |
if (!err && total_size < atom.size && atom.size < 0x7ffff) { |
| 483 |
//av_log(NULL, AV_LOG_DEBUG, "RESET %Ld %Ld err:%d\n", atom.size, total_size, err);
|
| 484 |
url_fskip(pb, atom.size - total_size); |
| 485 |
} |
| 486 |
|
| 487 |
#ifdef DEBUG
|
| 488 |
debug_indent--; |
| 489 |
#endif
|
| 490 |
return err;
|
| 491 |
} |
| 492 |
|
| 493 |
static int mov_read_ctab(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 494 |
{
|
| 495 |
#if 1 |
| 496 |
url_fskip(pb, atom.size); // for now
|
| 497 |
#else
|
| 498 |
VERY VERY BROKEN, NEVER execute this, needs rewrite |
| 499 |
unsigned int len; |
| 500 |
MOV_ctab_t *t; |
| 501 |
c->ctab = av_realloc(c->ctab, ++c->ctab_size); |
| 502 |
t = c->ctab[c->ctab_size]; |
| 503 |
t->seed = get_be32(pb); |
| 504 |
t->flags = get_be16(pb); |
| 505 |
t->size = get_be16(pb) + 1;
|
| 506 |
len = 2 * t->size * 4; |
| 507 |
if (len > 0) { |
| 508 |
t->clrs = av_malloc(len); // 16bit A R G B
|
| 509 |
if (t->clrs)
|
| 510 |
get_buffer(pb, t->clrs, len); |
| 511 |
} |
| 512 |
#endif
|
| 513 |
|
| 514 |
return 0; |
| 515 |
} |
| 516 |
|
| 517 |
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 518 |
{
|
| 519 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 520 |
int len = 0; |
| 521 |
uint32_t type; |
| 522 |
uint32_t ctype; |
| 523 |
|
| 524 |
print_atom("hdlr", atom);
|
| 525 |
|
| 526 |
get_byte(pb); /* version */
|
| 527 |
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
|
| 528 |
|
| 529 |
/* component type */
|
| 530 |
ctype = get_le32(pb); |
| 531 |
type = get_le32(pb); /* component subtype */
|
| 532 |
|
| 533 |
#ifdef DEBUG
|
| 534 |
av_log(NULL, AV_LOG_DEBUG, "ctype= %c%c%c%c (0x%08lx)\n", *((char *)&ctype), ((char *)&ctype)[1], ((char *)&ctype)[2], ((char *)&ctype)[3], (long) ctype); |
| 535 |
av_log(NULL, AV_LOG_DEBUG, "stype= %c%c%c%c\n", *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]); |
| 536 |
#endif
|
| 537 |
#ifdef DEBUG
|
| 538 |
/* XXX: yeah this is ugly... */
|
| 539 |
if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */ |
| 540 |
if(type == MKTAG('v', 'i', 'd', 'e')) |
| 541 |
puts("hdlr: vide");
|
| 542 |
else if(type == MKTAG('s', 'o', 'u', 'n')) |
| 543 |
puts("hdlr: soun");
|
| 544 |
} else if(ctype == 0) { /* MP4 */ |
| 545 |
if(type == MKTAG('v', 'i', 'd', 'e')) |
| 546 |
puts("hdlr: vide");
|
| 547 |
else if(type == MKTAG('s', 'o', 'u', 'n')) |
| 548 |
puts("hdlr: soun");
|
| 549 |
else if(type == MKTAG('o', 'd', 's', 'm')) |
| 550 |
puts("hdlr: odsm");
|
| 551 |
else if(type == MKTAG('s', 'd', 's', 'm')) |
| 552 |
puts("hdlr: sdsm");
|
| 553 |
} else puts("hdlr: meta"); |
| 554 |
#endif
|
| 555 |
|
| 556 |
if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */ |
| 557 |
/* helps parsing the string hereafter... */
|
| 558 |
c->mp4 = 0;
|
| 559 |
if(type == MKTAG('v', 'i', 'd', 'e')) |
| 560 |
st->codec->codec_type = CODEC_TYPE_VIDEO; |
| 561 |
else if(type == MKTAG('s', 'o', 'u', 'n')) |
| 562 |
st->codec->codec_type = CODEC_TYPE_AUDIO; |
| 563 |
} else if(ctype == 0) { /* MP4 */ |
| 564 |
/* helps parsing the string hereafter... */
|
| 565 |
c->mp4 = 1;
|
| 566 |
if(type == MKTAG('v', 'i', 'd', 'e')) |
| 567 |
st->codec->codec_type = CODEC_TYPE_VIDEO; |
| 568 |
else if(type == MKTAG('s', 'o', 'u', 'n')) |
| 569 |
st->codec->codec_type = CODEC_TYPE_AUDIO; |
| 570 |
} |
| 571 |
get_be32(pb); /* component manufacture */
|
| 572 |
get_be32(pb); /* component flags */
|
| 573 |
get_be32(pb); /* component flags mask */
|
| 574 |
|
| 575 |
if(atom.size <= 24) |
| 576 |
return 0; /* nothing left to read */ |
| 577 |
/* XXX: MP4 uses a C string, not a pascal one */
|
| 578 |
/* component name */
|
| 579 |
|
| 580 |
if(c->mp4) {
|
| 581 |
/* .mp4: C string */
|
| 582 |
while(get_byte(pb) && (++len < (atom.size - 24))); |
| 583 |
} else {
|
| 584 |
/* .mov: PASCAL string */
|
| 585 |
#ifdef DEBUG
|
| 586 |
char* buf;
|
| 587 |
#endif
|
| 588 |
len = get_byte(pb); |
| 589 |
#ifdef DEBUG
|
| 590 |
buf = (uint8_t*) av_malloc(len+1);
|
| 591 |
if (buf) {
|
| 592 |
get_buffer(pb, buf, len); |
| 593 |
buf[len] = '\0';
|
| 594 |
av_log(NULL, AV_LOG_DEBUG, "**buf='%s'\n", buf); |
| 595 |
av_free(buf); |
| 596 |
} else
|
| 597 |
#endif
|
| 598 |
url_fskip(pb, len); |
| 599 |
} |
| 600 |
|
| 601 |
url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset)); |
| 602 |
return 0; |
| 603 |
} |
| 604 |
|
| 605 |
static int mov_mp4_read_descr_len(ByteIOContext *pb) |
| 606 |
{
|
| 607 |
int len = 0; |
| 608 |
int count = 4; |
| 609 |
while (count--) {
|
| 610 |
int c = get_byte(pb);
|
| 611 |
len = (len << 7) | (c & 0x7f); |
| 612 |
if (!(c & 0x80)) |
| 613 |
break;
|
| 614 |
} |
| 615 |
return len;
|
| 616 |
} |
| 617 |
|
| 618 |
static int mov_mp4_read_descr(ByteIOContext *pb, int *tag) |
| 619 |
{
|
| 620 |
int len;
|
| 621 |
*tag = get_byte(pb); |
| 622 |
len = mov_mp4_read_descr_len(pb); |
| 623 |
#ifdef DEBUG
|
| 624 |
av_log(NULL, AV_LOG_DEBUG, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len); |
| 625 |
#endif
|
| 626 |
return len;
|
| 627 |
} |
| 628 |
|
| 629 |
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 630 |
{
|
| 631 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 632 |
MOVStreamContext *sc = (MOVStreamContext *)st->priv_data; |
| 633 |
int64_t start_pos = url_ftell(pb); |
| 634 |
int tag, len;
|
| 635 |
|
| 636 |
print_atom("esds", atom);
|
| 637 |
|
| 638 |
/* Well, broken but suffisant for some MP4 streams */
|
| 639 |
get_be32(pb); /* version + flags */
|
| 640 |
len = mov_mp4_read_descr(pb, &tag); |
| 641 |
if (tag == MP4ESDescrTag) {
|
| 642 |
get_be16(pb); /* ID */
|
| 643 |
get_byte(pb); /* priority */
|
| 644 |
} else
|
| 645 |
get_be16(pb); /* ID */
|
| 646 |
|
| 647 |
len = mov_mp4_read_descr(pb, &tag); |
| 648 |
if (tag == MP4DecConfigDescrTag) {
|
| 649 |
sc->esds.object_type_id = get_byte(pb); |
| 650 |
sc->esds.stream_type = get_byte(pb); |
| 651 |
sc->esds.buffer_size_db = get_be24(pb); |
| 652 |
sc->esds.max_bitrate = get_be32(pb); |
| 653 |
sc->esds.avg_bitrate = get_be32(pb); |
| 654 |
|
| 655 |
len = mov_mp4_read_descr(pb, &tag); |
| 656 |
//av_log(NULL, AV_LOG_DEBUG, "LEN %d TAG %d m:%d a:%d\n", len, tag, sc->esds.max_bitrate, sc->esds.avg_bitrate);
|
| 657 |
if (tag == MP4DecSpecificDescrTag) {
|
| 658 |
#ifdef DEBUG
|
| 659 |
av_log(NULL, AV_LOG_DEBUG, "Specific MPEG4 header len=%d\n", len); |
| 660 |
#endif
|
| 661 |
st->codec->extradata = (uint8_t*) av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE); |
| 662 |
if (st->codec->extradata) {
|
| 663 |
get_buffer(pb, st->codec->extradata, len); |
| 664 |
st->codec->extradata_size = len; |
| 665 |
} |
| 666 |
} |
| 667 |
} |
| 668 |
/* in any case, skip garbage */
|
| 669 |
url_fskip(pb, atom.size - ((url_ftell(pb) - start_pos))); |
| 670 |
return 0; |
| 671 |
} |
| 672 |
|
| 673 |
/* this atom contains actual media data */
|
| 674 |
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 675 |
{
|
| 676 |
print_atom("mdat", atom);
|
| 677 |
|
| 678 |
if(atom.size == 0) /* wrong one (MP4) */ |
| 679 |
return 0; |
| 680 |
c->found_mdat=1;
|
| 681 |
c->mdat_offset = atom.offset; |
| 682 |
c->mdat_size = atom.size; |
| 683 |
if(c->found_moov)
|
| 684 |
return 1; /* found both, just go */ |
| 685 |
url_fskip(pb, atom.size); |
| 686 |
return 0; /* now go for moov */ |
| 687 |
} |
| 688 |
|
| 689 |
/* this atom should contain all header atoms */
|
| 690 |
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 691 |
{
|
| 692 |
int err;
|
| 693 |
|
| 694 |
print_atom("moov", atom);
|
| 695 |
|
| 696 |
err = mov_read_default(c, pb, atom); |
| 697 |
/* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
|
| 698 |
/* so we don't parse the whole file if over a network */
|
| 699 |
c->found_moov=1;
|
| 700 |
if(c->found_mdat)
|
| 701 |
return 1; /* found both, just go */ |
| 702 |
return 0; /* now go for mdat */ |
| 703 |
} |
| 704 |
|
| 705 |
|
| 706 |
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 707 |
{
|
| 708 |
int version;
|
| 709 |
int lang;
|
| 710 |
print_atom("mdhd", atom);
|
| 711 |
|
| 712 |
version = get_byte(pb); /* version */
|
| 713 |
if (version > 1) |
| 714 |
return 1; /* unsupported */ |
| 715 |
|
| 716 |
get_byte(pb); get_byte(pb); |
| 717 |
get_byte(pb); /* flags */
|
| 718 |
|
| 719 |
(version==1)?get_be64(pb):get_be32(pb); /* creation time */ |
| 720 |
(version==1)?get_be64(pb):get_be32(pb); /* modification time */ |
| 721 |
|
| 722 |
c->streams[c->fc->nb_streams-1]->time_scale = get_be32(pb);
|
| 723 |
av_set_pts_info(c->fc->streams[c->fc->nb_streams-1], 64, 1, c->streams[c->fc->nb_streams-1]->time_scale); |
| 724 |
|
| 725 |
#ifdef DEBUG
|
| 726 |
av_log(NULL, AV_LOG_DEBUG, "track[%i].time_scale = %i\n", c->fc->nb_streams-1, c->streams[c->fc->nb_streams-1]->time_scale); /* time scale */ |
| 727 |
#endif
|
| 728 |
c->fc->streams[c->fc->nb_streams-1]->duration = (version==1)?get_be64(pb):get_be32(pb); /* duration */ |
| 729 |
|
| 730 |
lang = get_be16(pb); /* language */
|
| 731 |
ff_mov_lang_to_iso639(lang, c->fc->streams[c->fc->nb_streams-1]->language);
|
| 732 |
get_be16(pb); /* quality */
|
| 733 |
|
| 734 |
return 0; |
| 735 |
} |
| 736 |
|
| 737 |
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 738 |
{
|
| 739 |
print_atom("mvhd", atom);
|
| 740 |
|
| 741 |
get_byte(pb); /* version */
|
| 742 |
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
|
| 743 |
|
| 744 |
get_be32(pb); /* creation time */
|
| 745 |
get_be32(pb); /* modification time */
|
| 746 |
c->time_scale = get_be32(pb); /* time scale */
|
| 747 |
#ifdef DEBUG
|
| 748 |
av_log(NULL, AV_LOG_DEBUG, "time scale = %i\n", c->time_scale); |
| 749 |
#endif
|
| 750 |
c->duration = get_be32(pb); /* duration */
|
| 751 |
get_be32(pb); /* preferred scale */
|
| 752 |
|
| 753 |
get_be16(pb); /* preferred volume */
|
| 754 |
|
| 755 |
url_fskip(pb, 10); /* reserved */ |
| 756 |
|
| 757 |
url_fskip(pb, 36); /* display matrix */ |
| 758 |
|
| 759 |
get_be32(pb); /* preview time */
|
| 760 |
get_be32(pb); /* preview duration */
|
| 761 |
get_be32(pb); /* poster time */
|
| 762 |
get_be32(pb); /* selection time */
|
| 763 |
get_be32(pb); /* selection duration */
|
| 764 |
get_be32(pb); /* current time */
|
| 765 |
get_be32(pb); /* next track ID */
|
| 766 |
|
| 767 |
return 0; |
| 768 |
} |
| 769 |
|
| 770 |
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 771 |
{
|
| 772 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 773 |
|
| 774 |
if((uint64_t)atom.size > (1<<30)) |
| 775 |
return -1; |
| 776 |
|
| 777 |
// currently SVQ3 decoder expect full STSD header - so let's fake it
|
| 778 |
// this should be fixed and just SMI header should be passed
|
| 779 |
av_free(st->codec->extradata); |
| 780 |
st->codec->extradata_size = 0x5a + atom.size;
|
| 781 |
st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
| 782 |
|
| 783 |
if (st->codec->extradata) {
|
| 784 |
strcpy(st->codec->extradata, "SVQ3"); // fake |
| 785 |
get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
|
| 786 |
//av_log(NULL, AV_LOG_DEBUG, "Reading SMI %Ld %s\n", atom.size, (char*)st->codec->extradata + 0x5a);
|
| 787 |
} else
|
| 788 |
url_fskip(pb, atom.size); |
| 789 |
|
| 790 |
return 0; |
| 791 |
} |
| 792 |
|
| 793 |
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 794 |
{
|
| 795 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 796 |
|
| 797 |
if((uint64_t)atom.size > (1<<30)) |
| 798 |
return -1; |
| 799 |
|
| 800 |
// pass all frma atom to codec, needed at least for QDM2
|
| 801 |
av_free(st->codec->extradata); |
| 802 |
st->codec->extradata_size = atom.size; |
| 803 |
st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
| 804 |
|
| 805 |
if (st->codec->extradata) {
|
| 806 |
get_buffer(pb, st->codec->extradata, atom.size); |
| 807 |
//av_log(NULL, AV_LOG_DEBUG, "Reading frma %Ld %s\n", atom.size, (char*)st->codec->extradata);
|
| 808 |
} else
|
| 809 |
url_fskip(pb, atom.size); |
| 810 |
|
| 811 |
return 0; |
| 812 |
} |
| 813 |
|
| 814 |
static int mov_read_avcC(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 815 |
{
|
| 816 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 817 |
|
| 818 |
if((uint64_t)atom.size > (1<<30)) |
| 819 |
return -1; |
| 820 |
|
| 821 |
av_free(st->codec->extradata); |
| 822 |
|
| 823 |
st->codec->extradata_size = atom.size; |
| 824 |
st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
| 825 |
|
| 826 |
if (st->codec->extradata) {
|
| 827 |
get_buffer(pb, st->codec->extradata, atom.size); |
| 828 |
} else
|
| 829 |
url_fskip(pb, atom.size); |
| 830 |
|
| 831 |
return 0; |
| 832 |
} |
| 833 |
|
| 834 |
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 835 |
{
|
| 836 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 837 |
MOVStreamContext *sc = (MOVStreamContext *)st->priv_data; |
| 838 |
unsigned int i, entries; |
| 839 |
|
| 840 |
print_atom("stco", atom);
|
| 841 |
|
| 842 |
get_byte(pb); /* version */
|
| 843 |
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
|
| 844 |
|
| 845 |
entries = get_be32(pb); |
| 846 |
|
| 847 |
if(entries >= UINT_MAX/sizeof(int64_t)) |
| 848 |
return -1; |
| 849 |
|
| 850 |
sc->chunk_count = entries; |
| 851 |
sc->chunk_offsets = (int64_t*) av_malloc(entries * sizeof(int64_t));
|
| 852 |
if (!sc->chunk_offsets)
|
| 853 |
return -1; |
| 854 |
if (atom.type == MKTAG('s', 't', 'c', 'o')) { |
| 855 |
for(i=0; i<entries; i++) { |
| 856 |
sc->chunk_offsets[i] = get_be32(pb); |
| 857 |
} |
| 858 |
} else if (atom.type == MKTAG('c', 'o', '6', '4')) { |
| 859 |
for(i=0; i<entries; i++) { |
| 860 |
sc->chunk_offsets[i] = get_be64(pb); |
| 861 |
} |
| 862 |
} else
|
| 863 |
return -1; |
| 864 |
|
| 865 |
for(i=0; i<c->fc->nb_streams; i++){ |
| 866 |
MOVStreamContext *sc2 = (MOVStreamContext *)c->fc->streams[i]->priv_data; |
| 867 |
if(sc2 && sc2->chunk_offsets){
|
| 868 |
int64_t first= sc2->chunk_offsets[0];
|
| 869 |
int64_t last= sc2->chunk_offsets[sc2->chunk_count-1];
|
| 870 |
if(first >= sc->chunk_offsets[entries-1] || last <= sc->chunk_offsets[0]) |
| 871 |
c->ni=1;
|
| 872 |
} |
| 873 |
} |
| 874 |
#ifdef DEBUG
|
| 875 |
/*
|
| 876 |
for(i=0; i<entries; i++) {
|
| 877 |
av_log(NULL, AV_LOG_DEBUG, "chunk offset=0x%Lx\n", sc->chunk_offsets[i]);
|
| 878 |
}
|
| 879 |
*/
|
| 880 |
#endif
|
| 881 |
return 0; |
| 882 |
} |
| 883 |
|
| 884 |
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 885 |
{
|
| 886 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 887 |
MOVStreamContext *sc = (MOVStreamContext *)st->priv_data; |
| 888 |
int entries, frames_per_sample;
|
| 889 |
uint32_t format; |
| 890 |
uint8_t codec_name[32];
|
| 891 |
|
| 892 |
/* for palette traversal */
|
| 893 |
int color_depth;
|
| 894 |
int color_start;
|
| 895 |
int color_count;
|
| 896 |
int color_end;
|
| 897 |
int color_index;
|
| 898 |
int color_dec;
|
| 899 |
int color_greyscale;
|
| 900 |
unsigned char *color_table; |
| 901 |
int j;
|
| 902 |
unsigned char r, g, b; |
| 903 |
|
| 904 |
print_atom("stsd", atom);
|
| 905 |
|
| 906 |
get_byte(pb); /* version */
|
| 907 |
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
|
| 908 |
|
| 909 |
entries = get_be32(pb); |
| 910 |
|
| 911 |
while(entries--) { //Parsing Sample description table |
| 912 |
enum CodecID id;
|
| 913 |
int size = get_be32(pb); /* size */ |
| 914 |
format = get_le32(pb); /* data format */
|
| 915 |
|
| 916 |
get_be32(pb); /* reserved */
|
| 917 |
get_be16(pb); /* reserved */
|
| 918 |
get_be16(pb); /* index */
|
| 919 |
|
| 920 |
/* for MPEG4: set codec type by looking for it */
|
| 921 |
id = codec_get_id(mov_video_tags, format); |
| 922 |
if (id >= 0) { |
| 923 |
AVCodec *codec; |
| 924 |
codec = avcodec_find_decoder(id); |
| 925 |
if (codec)
|
| 926 |
st->codec->codec_type = codec->type; |
| 927 |
} |
| 928 |
#ifdef DEBUG
|
| 929 |
av_log(NULL, AV_LOG_DEBUG, "size=%d 4CC= %c%c%c%c codec_type=%d\n", |
| 930 |
size, |
| 931 |
(format >> 0) & 0xff, |
| 932 |
(format >> 8) & 0xff, |
| 933 |
(format >> 16) & 0xff, |
| 934 |
(format >> 24) & 0xff, |
| 935 |
st->codec->codec_type); |
| 936 |
#endif
|
| 937 |
st->codec->codec_tag = format; |
| 938 |
if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
|
| 939 |
MOV_atom_t a = { 0, 0, 0 };
|
| 940 |
st->codec->codec_id = id; |
| 941 |
get_be16(pb); /* version */
|
| 942 |
get_be16(pb); /* revision level */
|
| 943 |
get_be32(pb); /* vendor */
|
| 944 |
get_be32(pb); /* temporal quality */
|
| 945 |
get_be32(pb); /* spacial quality */
|
| 946 |
if(st->codec->codec_id == CODEC_ID_MPEG4){ //FIXME this is silly |
| 947 |
get_be16(pb); |
| 948 |
get_be16(pb); |
| 949 |
}else{
|
| 950 |
st->codec->width = get_be16(pb); /* width */
|
| 951 |
st->codec->height = get_be16(pb); /* height */
|
| 952 |
} |
| 953 |
get_be32(pb); /* horiz resolution */
|
| 954 |
get_be32(pb); /* vert resolution */
|
| 955 |
get_be32(pb); /* data size, always 0 */
|
| 956 |
frames_per_sample = get_be16(pb); /* frames per samples */
|
| 957 |
#ifdef DEBUG
|
| 958 |
av_log(NULL, AV_LOG_DEBUG, "frames/samples = %d\n", frames_per_sample); |
| 959 |
#endif
|
| 960 |
get_buffer(pb, codec_name, 32); /* codec name, pascal string (FIXME: true for mp4?) */ |
| 961 |
if (codec_name[0] <= 31) { |
| 962 |
memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]); |
| 963 |
st->codec->codec_name[codec_name[0]] = 0; |
| 964 |
} |
| 965 |
|
| 966 |
st->codec->bits_per_sample = get_be16(pb); /* depth */
|
| 967 |
st->codec->color_table_id = get_be16(pb); /* colortable id */
|
| 968 |
|
| 969 |
/* These are set in mov_read_stts and might already be set!
|
| 970 |
st->codec->time_base.den = 25;
|
| 971 |
st->codec->time_base.num = 1;
|
| 972 |
*/
|
| 973 |
size -= (16+8*4+2+32+2*2); |
| 974 |
#if 0
|
| 975 |
while (size >= 8) {
|
| 976 |
MOV_atom_t a;
|
| 977 |
int64_t start_pos;
|
| 978 |
|
| 979 |
a.size = get_be32(pb);
|
| 980 |
a.type = get_le32(pb);
|
| 981 |
size -= 8;
|
| 982 |
#ifdef DEBUG
|
| 983 |
av_log(NULL, AV_LOG_DEBUG, "VIDEO: atom_type=%c%c%c%c atom.size=%Ld size_left=%d\n",
|
| 984 |
(a.type >> 0) & 0xff,
|
| 985 |
(a.type >> 8) & 0xff,
|
| 986 |
(a.type >> 16) & 0xff,
|
| 987 |
(a.type >> 24) & 0xff,
|
| 988 |
a.size, size);
|
| 989 |
#endif
|
| 990 |
start_pos = url_ftell(pb); |
| 991 |
|
| 992 |
switch(a.type) {
|
| 993 |
case MKTAG('e', 's', 'd', 's'): |
| 994 |
{
|
| 995 |
int tag, len;
|
| 996 |
/* Well, broken but suffisant for some MP4 streams */
|
| 997 |
get_be32(pb); /* version + flags */
|
| 998 |
len = mov_mp4_read_descr(pb, &tag); |
| 999 |
if (tag == 0x03) { |
| 1000 |
/* MP4ESDescrTag */
|
| 1001 |
get_be16(pb); /* ID */
|
| 1002 |
get_byte(pb); /* priority */
|
| 1003 |
len = mov_mp4_read_descr(pb, &tag); |
| 1004 |
if (tag != 0x04) |
| 1005 |
goto fail;
|
| 1006 |
/* MP4DecConfigDescrTag */
|
| 1007 |
get_byte(pb); /* objectTypeId */
|
| 1008 |
get_be32(pb); /* streamType + buffer size */
|
| 1009 |
get_be32(pb); /* max bit rate */
|
| 1010 |
get_be32(pb); /* avg bit rate */
|
| 1011 |
len = mov_mp4_read_descr(pb, &tag); |
| 1012 |
if (tag != 0x05) |
| 1013 |
goto fail;
|
| 1014 |
/* MP4DecSpecificDescrTag */
|
| 1015 |
#ifdef DEBUG
|
| 1016 |
av_log(NULL, AV_LOG_DEBUG, "Specific MPEG4 header len=%d\n", len); |
| 1017 |
#endif
|
| 1018 |
sc->header_data = av_mallocz(len); |
| 1019 |
if (sc->header_data) {
|
| 1020 |
get_buffer(pb, sc->header_data, len); |
| 1021 |
sc->header_len = len; |
| 1022 |
} |
| 1023 |
} |
| 1024 |
/* in any case, skip garbage */
|
| 1025 |
} |
| 1026 |
break;
|
| 1027 |
default:
|
| 1028 |
break;
|
| 1029 |
} |
| 1030 |
fail:
|
| 1031 |
av_log(NULL, AV_LOG_DEBUG, "ATOMENEWSIZE %Ld %d\n", atom.size, url_ftell(pb) - start_pos); |
| 1032 |
if (atom.size > 8) { |
| 1033 |
url_fskip(pb, (atom.size - 8) -
|
| 1034 |
((url_ftell(pb) - start_pos))); |
| 1035 |
size -= atom.size - 8;
|
| 1036 |
} |
| 1037 |
} |
| 1038 |
if (size > 0) { |
| 1039 |
/* unknown extension */
|
| 1040 |
url_fskip(pb, size); |
| 1041 |
} |
| 1042 |
#else
|
| 1043 |
|
| 1044 |
/* figure out the palette situation */
|
| 1045 |
color_depth = st->codec->bits_per_sample & 0x1F;
|
| 1046 |
color_greyscale = st->codec->bits_per_sample & 0x20;
|
| 1047 |
|
| 1048 |
/* if the depth is 2, 4, or 8 bpp, file is palettized */
|
| 1049 |
if ((color_depth == 2) || (color_depth == 4) || |
| 1050 |
(color_depth == 8)) {
|
| 1051 |
|
| 1052 |
if (color_greyscale) {
|
| 1053 |
|
| 1054 |
/* compute the greyscale palette */
|
| 1055 |
color_count = 1 << color_depth;
|
| 1056 |
color_index = 255;
|
| 1057 |
color_dec = 256 / (color_count - 1); |
| 1058 |
for (j = 0; j < color_count; j++) { |
| 1059 |
r = g = b = color_index; |
| 1060 |
c->palette_control.palette[j] = |
| 1061 |
(r << 16) | (g << 8) | (b); |
| 1062 |
color_index -= color_dec; |
| 1063 |
if (color_index < 0) |
| 1064 |
color_index = 0;
|
| 1065 |
} |
| 1066 |
|
| 1067 |
} else if (st->codec->color_table_id & 0x08) { |
| 1068 |
|
| 1069 |
/* if flag bit 3 is set, use the default palette */
|
| 1070 |
color_count = 1 << color_depth;
|
| 1071 |
if (color_depth == 2) |
| 1072 |
color_table = ff_qt_default_palette_4; |
| 1073 |
else if (color_depth == 4) |
| 1074 |
color_table = ff_qt_default_palette_16; |
| 1075 |
else
|
| 1076 |
color_table = ff_qt_default_palette_256; |
| 1077 |
|
| 1078 |
for (j = 0; j < color_count; j++) { |
| 1079 |
r = color_table[j * 4 + 0]; |
| 1080 |
g = color_table[j * 4 + 1]; |
| 1081 |
b = color_table[j * 4 + 2]; |
| 1082 |
c->palette_control.palette[j] = |
| 1083 |
(r << 16) | (g << 8) | (b); |
| 1084 |
} |
| 1085 |
|
| 1086 |
} else {
|
| 1087 |
|
| 1088 |
/* load the palette from the file */
|
| 1089 |
color_start = get_be32(pb); |
| 1090 |
color_count = get_be16(pb); |
| 1091 |
color_end = get_be16(pb); |
| 1092 |
for (j = color_start; j <= color_end; j++) {
|
| 1093 |
/* each R, G, or B component is 16 bits;
|
| 1094 |
* only use the top 8 bits; skip alpha bytes
|
| 1095 |
* up front */
|
| 1096 |
get_byte(pb); |
| 1097 |
get_byte(pb); |
| 1098 |
r = get_byte(pb); |
| 1099 |
get_byte(pb); |
| 1100 |
g = get_byte(pb); |
| 1101 |
get_byte(pb); |
| 1102 |
b = get_byte(pb); |
| 1103 |
get_byte(pb); |
| 1104 |
c->palette_control.palette[j] = |
| 1105 |
(r << 16) | (g << 8) | (b); |
| 1106 |
} |
| 1107 |
} |
| 1108 |
|
| 1109 |
st->codec->palctrl = &c->palette_control; |
| 1110 |
st->codec->palctrl->palette_changed = 1;
|
| 1111 |
} else
|
| 1112 |
st->codec->palctrl = NULL;
|
| 1113 |
|
| 1114 |
a.size = size; |
| 1115 |
mov_read_default(c, pb, a); |
| 1116 |
#endif
|
| 1117 |
} else {
|
| 1118 |
st->codec->codec_id = codec_get_id(mov_audio_tags, format); |
| 1119 |
if(st->codec->codec_id==CODEC_ID_AMR_NB || st->codec->codec_id==CODEC_ID_AMR_WB) //from TS26.244 |
| 1120 |
{
|
| 1121 |
#ifdef DEBUG
|
| 1122 |
av_log(NULL, AV_LOG_DEBUG, "AMR-NB or AMR-WB audio identified!!\n"); |
| 1123 |
#endif
|
| 1124 |
get_be32(pb);get_be32(pb); //Reserved_8
|
| 1125 |
get_be16(pb);//Reserved_2
|
| 1126 |
get_be16(pb);//Reserved_2
|
| 1127 |
get_be32(pb);//Reserved_4
|
| 1128 |
get_be16(pb);//TimeScale
|
| 1129 |
get_be16(pb);//Reserved_2
|
| 1130 |
|
| 1131 |
//AMRSpecificBox.(10 bytes)
|
| 1132 |
|
| 1133 |
get_be32(pb); //size
|
| 1134 |
get_be32(pb); //type=='damr'
|
| 1135 |
get_be32(pb); //vendor
|
| 1136 |
get_byte(pb); //decoder version
|
| 1137 |
get_be16(pb); //mode_set
|
| 1138 |
get_byte(pb); //mode_change_period
|
| 1139 |
get_byte(pb); //frames_per_sample
|
| 1140 |
|
| 1141 |
st->duration = AV_NOPTS_VALUE;//Not possible to get from this info, must count number of AMR frames
|
| 1142 |
if(st->codec->codec_id==CODEC_ID_AMR_NB)
|
| 1143 |
{
|
| 1144 |
st->codec->sample_rate=8000;
|
| 1145 |
st->codec->channels=1;
|
| 1146 |
} |
| 1147 |
else //AMR-WB |
| 1148 |
{
|
| 1149 |
st->codec->sample_rate=16000;
|
| 1150 |
st->codec->channels=1;
|
| 1151 |
} |
| 1152 |
st->codec->bits_per_sample=16;
|
| 1153 |
st->codec->bit_rate=0; /*It is not possible to tell this before we have |
| 1154 |
an audio frame and even then every frame can be different*/
|
| 1155 |
} |
| 1156 |
else if( st->codec->codec_tag == MKTAG( 'm', 'p', '4', 's' )) |
| 1157 |
{
|
| 1158 |
//This is some stuff for the hint track, lets ignore it!
|
| 1159 |
//Do some mp4 auto detect.
|
| 1160 |
c->mp4=1;
|
| 1161 |
size-=(16);
|
| 1162 |
url_fskip(pb, size); /* The mp4s atom also contians a esds atom that we can skip*/
|
| 1163 |
} |
| 1164 |
else if( st->codec->codec_tag == MKTAG( 'm', 'p', '4', 'a' )) |
| 1165 |
{
|
| 1166 |
MOV_atom_t a; |
| 1167 |
int mp4_version;
|
| 1168 |
|
| 1169 |
/* Handle mp4 audio tag */
|
| 1170 |
mp4_version=get_be16(pb);/*version*/
|
| 1171 |
get_be16(pb); /*revesion*/
|
| 1172 |
get_be32(pb); |
| 1173 |
st->codec->channels = get_be16(pb); /* channels */
|
| 1174 |
st->codec->bits_per_sample = get_be16(pb); /* bits per sample */
|
| 1175 |
get_be32(pb); |
| 1176 |
st->codec->sample_rate = get_be16(pb); /* sample rate, not always correct */
|
| 1177 |
if(st->codec->sample_rate == 1) //nonsese rate? -> ignore |
| 1178 |
st->codec->sample_rate= 0;
|
| 1179 |
|
| 1180 |
get_be16(pb); |
| 1181 |
c->mp4=1;
|
| 1182 |
|
| 1183 |
if(mp4_version==1) |
| 1184 |
{
|
| 1185 |
url_fskip(pb,16);
|
| 1186 |
a.size=size-(16+20+16); |
| 1187 |
} |
| 1188 |
else
|
| 1189 |
a.size=size-(16+20); |
| 1190 |
|
| 1191 |
a.offset=url_ftell(pb); |
| 1192 |
|
| 1193 |
mov_read_default(c, pb, a); |
| 1194 |
|
| 1195 |
/* Get correct sample rate from extradata */
|
| 1196 |
if(st->codec->extradata_size) {
|
| 1197 |
const int samplerate_table[] = { |
| 1198 |
96000, 88200, 64000, 48000, 44100, 32000, |
| 1199 |
24000, 22050, 16000, 12000, 11025, 8000, |
| 1200 |
7350, 0, 0, 0 |
| 1201 |
}; |
| 1202 |
unsigned char *px = st->codec->extradata; |
| 1203 |
// 5 bits objectTypeIndex, 4 bits sampleRateIndex, 4 bits channels
|
| 1204 |
int samplerate_index = ((px[0] & 7) << 1) + ((px[1] >> 7) & 1); |
| 1205 |
st->codec->sample_rate = samplerate_table[samplerate_index]; |
| 1206 |
st->codec->channels = (px[1] >> 3) & 15; |
| 1207 |
} |
| 1208 |
} |
| 1209 |
else if( st->codec->codec_tag == MKTAG( 'a', 'l', 'a', 'c' )) |
| 1210 |
{
|
| 1211 |
/* Handle alac audio tag + special extradata */
|
| 1212 |
get_be32(pb); /* version */
|
| 1213 |
get_be32(pb); |
| 1214 |
st->codec->channels = get_be16(pb); /* channels */
|
| 1215 |
st->codec->bits_per_sample = get_be16(pb); /* bits per sample */
|
| 1216 |
get_be32(pb); |
| 1217 |
st->codec->sample_rate = get_be16(pb); |
| 1218 |
get_be16(pb); |
| 1219 |
|
| 1220 |
/* fetch the 36-byte extradata needed for alac decoding */
|
| 1221 |
st->codec->extradata_size = 36;
|
| 1222 |
st->codec->extradata = (uint8_t*) |
| 1223 |
av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
| 1224 |
get_buffer(pb, st->codec->extradata, st->codec->extradata_size); |
| 1225 |
} |
| 1226 |
else if(size>=(16+20)) |
| 1227 |
{//16 bytes read, reading atleast 20 more
|
| 1228 |
uint16_t version; |
| 1229 |
#ifdef DEBUG
|
| 1230 |
av_log(NULL, AV_LOG_DEBUG, "audio size=0x%X\n",size); |
| 1231 |
#endif
|
| 1232 |
version = get_be16(pb); /* version */
|
| 1233 |
get_be16(pb); /* revision level */
|
| 1234 |
get_be32(pb); /* vendor */
|
| 1235 |
|
| 1236 |
st->codec->channels = get_be16(pb); /* channel count */
|
| 1237 |
st->codec->bits_per_sample = get_be16(pb); /* sample size */
|
| 1238 |
|
| 1239 |
/* handle specific s8 codec */
|
| 1240 |
get_be16(pb); /* compression id = 0*/
|
| 1241 |
get_be16(pb); /* packet size = 0 */
|
| 1242 |
|
| 1243 |
st->codec->sample_rate = ((get_be32(pb) >> 16));
|
| 1244 |
//av_log(NULL, AV_LOG_DEBUG, "CODECID %d %d %.4s\n", st->codec->codec_id, CODEC_ID_PCM_S16BE, (char*)&format);
|
| 1245 |
|
| 1246 |
switch (st->codec->codec_id) {
|
| 1247 |
case CODEC_ID_PCM_S16BE:
|
| 1248 |
if (st->codec->bits_per_sample == 8) |
| 1249 |
st->codec->codec_id = CODEC_ID_PCM_S8; |
| 1250 |
/* fall */
|
| 1251 |
case CODEC_ID_PCM_U8:
|
| 1252 |
st->codec->bit_rate = st->codec->sample_rate * 8;
|
| 1253 |
break;
|
| 1254 |
default:
|
| 1255 |
; |
| 1256 |
} |
| 1257 |
|
| 1258 |
//Read QT version 1 fields. In version 0 theese dont exist
|
| 1259 |
#ifdef DEBUG
|
| 1260 |
av_log(NULL, AV_LOG_DEBUG, "version =%d mp4=%d\n",version,c->mp4); |
| 1261 |
av_log(NULL, AV_LOG_DEBUG, "size-(16+20+16)=%d\n",size-(16+20+16)); |
| 1262 |
#endif
|
| 1263 |
if((version==1) && size>=(16+20+16)) |
| 1264 |
{
|
| 1265 |
get_be32(pb); /* samples per packet */
|
| 1266 |
get_be32(pb); /* bytes per packet */
|
| 1267 |
get_be32(pb); /* bytes per frame */
|
| 1268 |
get_be32(pb); /* bytes per sample */
|
| 1269 |
if(size>(16+20+16)) |
| 1270 |
{
|
| 1271 |
//Optional, additional atom-based fields
|
| 1272 |
MOV_atom_t a = { format, url_ftell(pb), size - (16 + 20 + 16 + 8) };
|
| 1273 |
#ifdef DEBUG
|
| 1274 |
av_log(NULL, AV_LOG_DEBUG, "offest=0x%X, sizeleft=%d=0x%x,format=%c%c%c%c\n",(int)url_ftell(pb),size - (16 + 20 + 16 ),size - (16 + 20 + 16 ), |
| 1275 |
(format >> 0) & 0xff, |
| 1276 |
(format >> 8) & 0xff, |
| 1277 |
(format >> 16) & 0xff, |
| 1278 |
(format >> 24) & 0xff); |
| 1279 |
#endif
|
| 1280 |
mov_read_default(c, pb, a); |
| 1281 |
} |
| 1282 |
} |
| 1283 |
else
|
| 1284 |
{
|
| 1285 |
//We should be down to 0 bytes here, but lets make sure.
|
| 1286 |
size-=(16+20); |
| 1287 |
#ifdef DEBUG
|
| 1288 |
if(size>0) |
| 1289 |
av_log(NULL, AV_LOG_DEBUG, "skipping 0x%X bytes\n",size-(16+20)); |
| 1290 |
#endif
|
| 1291 |
url_fskip(pb, size); |
| 1292 |
} |
| 1293 |
} |
| 1294 |
else
|
| 1295 |
{
|
| 1296 |
size-=16;
|
| 1297 |
//Unknown size, but lets do our best and skip the rest.
|
| 1298 |
#ifdef DEBUG
|
| 1299 |
av_log(NULL, AV_LOG_DEBUG, "Strange size, skipping 0x%X bytes\n",size); |
| 1300 |
#endif
|
| 1301 |
url_fskip(pb, size); |
| 1302 |
} |
| 1303 |
} |
| 1304 |
} |
| 1305 |
|
| 1306 |
if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1) { |
| 1307 |
st->codec->sample_rate= sc->time_scale; |
| 1308 |
} |
| 1309 |
|
| 1310 |
return 0; |
| 1311 |
} |
| 1312 |
|
| 1313 |
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 1314 |
{
|
| 1315 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 1316 |
MOVStreamContext *sc = (MOVStreamContext *)st->priv_data; |
| 1317 |
unsigned int i, entries; |
| 1318 |
|
| 1319 |
print_atom("stsc", atom);
|
| 1320 |
|
| 1321 |
get_byte(pb); /* version */
|
| 1322 |
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
|
| 1323 |
|
| 1324 |
entries = get_be32(pb); |
| 1325 |
|
| 1326 |
if(entries >= UINT_MAX / sizeof(MOV_sample_to_chunk_tbl)) |
| 1327 |
return -1; |
| 1328 |
|
| 1329 |
#ifdef DEBUG
|
| 1330 |
av_log(NULL, AV_LOG_DEBUG, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries); |
| 1331 |
#endif
|
| 1332 |
sc->sample_to_chunk_sz = entries; |
| 1333 |
sc->sample_to_chunk = (MOV_sample_to_chunk_tbl*) av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));
|
| 1334 |
if (!sc->sample_to_chunk)
|
| 1335 |
return -1; |
| 1336 |
for(i=0; i<entries; i++) { |
| 1337 |
sc->sample_to_chunk[i].first = get_be32(pb); |
| 1338 |
sc->sample_to_chunk[i].count = get_be32(pb); |
| 1339 |
sc->sample_to_chunk[i].id = get_be32(pb); |
| 1340 |
#ifdef DEBUG
|
| 1341 |
/* av_log(NULL, AV_LOG_DEBUG, "sample_to_chunk first=%ld count=%ld, id=%ld\n", sc->sample_to_chunk[i].first, sc->sample_to_chunk[i].count, sc->sample_to_chunk[i].id); */
|
| 1342 |
#endif
|
| 1343 |
} |
| 1344 |
return 0; |
| 1345 |
} |
| 1346 |
|
| 1347 |
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 1348 |
{
|
| 1349 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 1350 |
MOVStreamContext *sc = (MOVStreamContext *)st->priv_data; |
| 1351 |
unsigned int i, entries; |
| 1352 |
|
| 1353 |
print_atom("stss", atom);
|
| 1354 |
|
| 1355 |
get_byte(pb); /* version */
|
| 1356 |
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
|
| 1357 |
|
| 1358 |
entries = get_be32(pb); |
| 1359 |
|
| 1360 |
if(entries >= UINT_MAX / sizeof(long)) |
| 1361 |
return -1; |
| 1362 |
|
| 1363 |
sc->keyframe_count = entries; |
| 1364 |
#ifdef DEBUG
|
| 1365 |
av_log(NULL, AV_LOG_DEBUG, "keyframe_count = %ld\n", sc->keyframe_count); |
| 1366 |
#endif
|
| 1367 |
sc->keyframes = (long*) av_malloc(entries * sizeof(long)); |
| 1368 |
if (!sc->keyframes)
|
| 1369 |
return -1; |
| 1370 |
for(i=0; i<entries; i++) { |
| 1371 |
sc->keyframes[i] = get_be32(pb); |
| 1372 |
#ifdef DEBUG
|
| 1373 |
/* av_log(NULL, AV_LOG_DEBUG, "keyframes[]=%ld\n", sc->keyframes[i]); */
|
| 1374 |
#endif
|
| 1375 |
} |
| 1376 |
return 0; |
| 1377 |
} |
| 1378 |
|
| 1379 |
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 1380 |
{
|
| 1381 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 1382 |
MOVStreamContext *sc = (MOVStreamContext *)st->priv_data; |
| 1383 |
unsigned int i, entries; |
| 1384 |
|
| 1385 |
print_atom("stsz", atom);
|
| 1386 |
|
| 1387 |
get_byte(pb); /* version */
|
| 1388 |
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
|
| 1389 |
|
| 1390 |
sc->sample_size = get_be32(pb); |
| 1391 |
entries = get_be32(pb); |
| 1392 |
if(entries >= UINT_MAX / sizeof(long)) |
| 1393 |
return -1; |
| 1394 |
|
| 1395 |
sc->sample_count = entries; |
| 1396 |
#ifdef DEBUG
|
| 1397 |
av_log(NULL, AV_LOG_DEBUG, "sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count); |
| 1398 |
#endif
|
| 1399 |
if(sc->sample_size)
|
| 1400 |
return 0; /* there isn't any table following */ |
| 1401 |
sc->sample_sizes = (long*) av_malloc(entries * sizeof(long)); |
| 1402 |
if (!sc->sample_sizes)
|
| 1403 |
return -1; |
| 1404 |
for(i=0; i<entries; i++) { |
| 1405 |
sc->sample_sizes[i] = get_be32(pb); |
| 1406 |
#ifdef DEBUG
|
| 1407 |
av_log(NULL, AV_LOG_DEBUG, "sample_sizes[]=%ld\n", sc->sample_sizes[i]); |
| 1408 |
#endif
|
| 1409 |
} |
| 1410 |
return 0; |
| 1411 |
} |
| 1412 |
|
| 1413 |
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 1414 |
{
|
| 1415 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 1416 |
//MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
|
| 1417 |
unsigned int i, entries; |
| 1418 |
int64_t duration=0;
|
| 1419 |
int64_t total_sample_count=0;
|
| 1420 |
|
| 1421 |
print_atom("stts", atom);
|
| 1422 |
|
| 1423 |
get_byte(pb); /* version */
|
| 1424 |
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
|
| 1425 |
entries = get_be32(pb); |
| 1426 |
if(entries >= UINT_MAX / sizeof(Time2Sample)) |
| 1427 |
return -1; |
| 1428 |
|
| 1429 |
c->streams[c->fc->nb_streams-1]->stts_count = entries;
|
| 1430 |
c->streams[c->fc->nb_streams-1]->stts_data = av_malloc(entries * sizeof(Time2Sample)); |
| 1431 |
|
| 1432 |
#ifdef DEBUG
|
| 1433 |
av_log(NULL, AV_LOG_DEBUG, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries); |
| 1434 |
#endif
|
| 1435 |
for(i=0; i<entries; i++) { |
| 1436 |
int sample_duration;
|
| 1437 |
int sample_count;
|
| 1438 |
|
| 1439 |
sample_count=get_be32(pb); |
| 1440 |
sample_duration = get_be32(pb); |
| 1441 |
c->streams[c->fc->nb_streams - 1]->stts_data[i].count= sample_count;
|
| 1442 |
c->streams[c->fc->nb_streams - 1]->stts_data[i].duration= sample_duration;
|
| 1443 |
|
| 1444 |
#ifdef DEBUG
|
| 1445 |
av_log(NULL, AV_LOG_DEBUG, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration); |
| 1446 |
#endif
|
| 1447 |
duration+=sample_duration*sample_count; |
| 1448 |
total_sample_count+=sample_count; |
| 1449 |
} |
| 1450 |
|
| 1451 |
st->nb_frames= total_sample_count; |
| 1452 |
if(duration)
|
| 1453 |
st->duration= duration; |
| 1454 |
return 0; |
| 1455 |
} |
| 1456 |
|
| 1457 |
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 1458 |
{
|
| 1459 |
// AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 1460 |
//MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
|
| 1461 |
unsigned int i, entries; |
| 1462 |
|
| 1463 |
print_atom("ctts", atom);
|
| 1464 |
|
| 1465 |
get_byte(pb); /* version */
|
| 1466 |
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
|
| 1467 |
entries = get_be32(pb); |
| 1468 |
if(entries >= UINT_MAX / sizeof(Time2Sample)) |
| 1469 |
return -1; |
| 1470 |
|
| 1471 |
c->streams[c->fc->nb_streams-1]->ctts_count = entries;
|
| 1472 |
c->streams[c->fc->nb_streams-1]->ctts_data = av_malloc(entries * sizeof(Time2Sample)); |
| 1473 |
|
| 1474 |
// #ifdef DEBUG
|
| 1475 |
av_log(NULL, AV_LOG_DEBUG, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries); |
| 1476 |
// #endif
|
| 1477 |
for(i=0; i<entries; i++) { |
| 1478 |
c->streams[c->fc->nb_streams - 1]->ctts_data[i].count= get_be32(pb);
|
| 1479 |
c->streams[c->fc->nb_streams - 1]->ctts_data[i].duration= get_be32(pb);
|
| 1480 |
} |
| 1481 |
return 0; |
| 1482 |
} |
| 1483 |
|
| 1484 |
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 1485 |
{
|
| 1486 |
AVStream *st; |
| 1487 |
MOVStreamContext *sc; |
| 1488 |
|
| 1489 |
print_atom("trak", atom);
|
| 1490 |
|
| 1491 |
st = av_new_stream(c->fc, c->fc->nb_streams); |
| 1492 |
if (!st) return -2; |
| 1493 |
sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext));
|
| 1494 |
if (!sc) {
|
| 1495 |
av_free(st); |
| 1496 |
return -1; |
| 1497 |
} |
| 1498 |
|
| 1499 |
sc->sample_to_chunk_index = -1;
|
| 1500 |
st->priv_data = sc; |
| 1501 |
st->codec->codec_type = CODEC_TYPE_MOV_OTHER; |
| 1502 |
st->start_time = 0; /* XXX: check */ |
| 1503 |
c->streams[c->fc->nb_streams-1] = sc;
|
| 1504 |
|
| 1505 |
return mov_read_default(c, pb, atom);
|
| 1506 |
} |
| 1507 |
|
| 1508 |
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 1509 |
{
|
| 1510 |
AVStream *st; |
| 1511 |
|
| 1512 |
print_atom("tkhd", atom);
|
| 1513 |
|
| 1514 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 1515 |
|
| 1516 |
get_byte(pb); /* version */
|
| 1517 |
|
| 1518 |
get_byte(pb); get_byte(pb); |
| 1519 |
get_byte(pb); /* flags */
|
| 1520 |
/*
|
| 1521 |
MOV_TRACK_ENABLED 0x0001
|
| 1522 |
MOV_TRACK_IN_MOVIE 0x0002
|
| 1523 |
MOV_TRACK_IN_PREVIEW 0x0004
|
| 1524 |
MOV_TRACK_IN_POSTER 0x0008
|
| 1525 |
*/
|
| 1526 |
|
| 1527 |
get_be32(pb); /* creation time */
|
| 1528 |
get_be32(pb); /* modification time */
|
| 1529 |
st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/ |
| 1530 |
get_be32(pb); /* reserved */
|
| 1531 |
st->start_time = 0; /* check */ |
| 1532 |
get_be32(pb); /* highlevel (considering edits) duration in movie timebase */
|
| 1533 |
get_be32(pb); /* reserved */
|
| 1534 |
get_be32(pb); /* reserved */
|
| 1535 |
|
| 1536 |
get_be16(pb); /* layer */
|
| 1537 |
get_be16(pb); /* alternate group */
|
| 1538 |
get_be16(pb); /* volume */
|
| 1539 |
get_be16(pb); /* reserved */
|
| 1540 |
|
| 1541 |
url_fskip(pb, 36); /* display matrix */ |
| 1542 |
|
| 1543 |
/* those are fixed-point */
|
| 1544 |
/*st->codec->width =*/ get_be32(pb) >> 16; /* track width */ |
| 1545 |
/*st->codec->height =*/ get_be32(pb) >> 16; /* track height */ |
| 1546 |
|
| 1547 |
return 0; |
| 1548 |
} |
| 1549 |
|
| 1550 |
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
|
| 1551 |
/* like the files created with Adobe Premiere 5.0, for samples see */
|
| 1552 |
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
|
| 1553 |
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 1554 |
{
|
| 1555 |
int err;
|
| 1556 |
|
| 1557 |
#ifdef DEBUG
|
| 1558 |
print_atom("wide", atom);
|
| 1559 |
debug_indent++; |
| 1560 |
#endif
|
| 1561 |
if (atom.size < 8) |
| 1562 |
return 0; /* continue */ |
| 1563 |
if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */ |
| 1564 |
url_fskip(pb, atom.size - 4);
|
| 1565 |
return 0; |
| 1566 |
} |
| 1567 |
atom.type = get_le32(pb); |
| 1568 |
atom.offset += 8;
|
| 1569 |
atom.size -= 8;
|
| 1570 |
if (atom.type != MKTAG('m', 'd', 'a', 't')) { |
| 1571 |
url_fskip(pb, atom.size); |
| 1572 |
return 0; |
| 1573 |
} |
| 1574 |
err = mov_read_mdat(c, pb, atom); |
| 1575 |
#ifdef DEBUG
|
| 1576 |
debug_indent--; |
| 1577 |
#endif
|
| 1578 |
return err;
|
| 1579 |
} |
| 1580 |
|
| 1581 |
|
| 1582 |
#ifdef CONFIG_ZLIB
|
| 1583 |
static int null_read_packet(void *opaque, uint8_t *buf, int buf_size) |
| 1584 |
{
|
| 1585 |
return -1; |
| 1586 |
} |
| 1587 |
|
| 1588 |
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 1589 |
{
|
| 1590 |
ByteIOContext ctx; |
| 1591 |
uint8_t *cmov_data; |
| 1592 |
uint8_t *moov_data; /* uncompressed data */
|
| 1593 |
long cmov_len, moov_len;
|
| 1594 |
int ret;
|
| 1595 |
|
| 1596 |
print_atom("cmov", atom);
|
| 1597 |
|
| 1598 |
get_be32(pb); /* dcom atom */
|
| 1599 |
if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' )) |
| 1600 |
return -1; |
| 1601 |
if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) { |
| 1602 |
av_log(NULL, AV_LOG_DEBUG, "unknown compression for cmov atom !"); |
| 1603 |
return -1; |
| 1604 |
} |
| 1605 |
get_be32(pb); /* cmvd atom */
|
| 1606 |
if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' )) |
| 1607 |
return -1; |
| 1608 |
moov_len = get_be32(pb); /* uncompressed size */
|
| 1609 |
cmov_len = atom.size - 6 * 4; |
| 1610 |
|
| 1611 |
cmov_data = (uint8_t *) av_malloc(cmov_len); |
| 1612 |
if (!cmov_data)
|
| 1613 |
return -1; |
| 1614 |
moov_data = (uint8_t *) av_malloc(moov_len); |
| 1615 |
if (!moov_data) {
|
| 1616 |
av_free(cmov_data); |
| 1617 |
return -1; |
| 1618 |
} |
| 1619 |
get_buffer(pb, cmov_data, cmov_len); |
| 1620 |
if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK) |
| 1621 |
return -1; |
| 1622 |
if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0) |
| 1623 |
return -1; |
| 1624 |
ctx.buf_end = ctx.buffer + moov_len; |
| 1625 |
atom.type = MKTAG( 'm', 'o', 'o', 'v' ); |
| 1626 |
atom.offset = 0;
|
| 1627 |
atom.size = moov_len; |
| 1628 |
#ifdef DEBUG
|
| 1629 |
{ int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
|
| 1630 |
#endif
|
| 1631 |
ret = mov_read_default(c, &ctx, atom); |
| 1632 |
av_free(moov_data); |
| 1633 |
av_free(cmov_data); |
| 1634 |
|
| 1635 |
return ret;
|
| 1636 |
} |
| 1637 |
#endif
|
| 1638 |
|
| 1639 |
/* edit list atom */
|
| 1640 |
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom) |
| 1641 |
{
|
| 1642 |
int i, edit_count;
|
| 1643 |
print_atom("elst", atom);
|
| 1644 |
|
| 1645 |
get_byte(pb); /* version */
|
| 1646 |
get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
|
| 1647 |
edit_count= c->streams[c->fc->nb_streams-1]->edit_count = get_be32(pb); /* entries */ |
| 1648 |
|
| 1649 |
for(i=0; i<edit_count; i++){ |
| 1650 |
get_be32(pb); /* Track duration */
|
| 1651 |
get_be32(pb); /* Media time */
|
| 1652 |
get_be32(pb); /* Media rate */
|
| 1653 |
} |
| 1654 |
#ifdef DEBUG
|
| 1655 |
av_log(NULL, AV_LOG_DEBUG, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, c->streams[c->fc->nb_streams-1]->edit_count); |
| 1656 |
#endif
|
| 1657 |
return 0; |
| 1658 |
} |
| 1659 |
|
| 1660 |
static const MOVParseTableEntry mov_default_parse_table[] = { |
| 1661 |
/* mp4 atoms */
|
| 1662 |
{ MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },
|
| 1663 |
{ MKTAG( 'c', 'p', 'r', 't' ), mov_read_default },
|
| 1664 |
{ MKTAG( 'c', 'r', 'h', 'd' ), mov_read_default },
|
| 1665 |
{ MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */
|
| 1666 |
{ MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */
|
| 1667 |
{ MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf },
|
| 1668 |
{ MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf },
|
| 1669 |
{ MKTAG( 'e', 'd', 't', 's' ), mov_read_default },
|
| 1670 |
{ MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },
|
| 1671 |
{ MKTAG( 'f', 'r', 'e', 'e' ), mov_read_leaf },
|
| 1672 |
{ MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },
|
| 1673 |
{ MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf },
|
| 1674 |
{ MKTAG( 'h', 'm', 'h', 'd' ), mov_read_leaf },
|
| 1675 |
{ MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf },
|
| 1676 |
{ MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },
|
| 1677 |
{ MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },
|
| 1678 |
{ MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },
|
| 1679 |
{ MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },
|
| 1680 |
{ MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },
|
| 1681 |
{ MKTAG( 'm', 'p', '4', 'a' ), mov_read_default },
|
| 1682 |
{ MKTAG( 'm', 'p', '4', 's' ), mov_read_default },
|
| 1683 |
{ MKTAG( 'm', 'p', '4', 'v' ), mov_read_default },
|
| 1684 |
{ MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf },
|
| 1685 |
{ MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },
|
| 1686 |
{ MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf },
|
| 1687 |
{ MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default },
|
| 1688 |
{ MKTAG( 's', 'd', 'h', 'd' ), mov_read_default },
|
| 1689 |
{ MKTAG( 's', 'k', 'i', 'p' ), mov_read_leaf },
|
| 1690 |
{ MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */
|
| 1691 |
{ MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */
|
| 1692 |
{ MKTAG( 'a', 'v', 'c', 'C' ), mov_read_avcC },
|
| 1693 |
{ MKTAG( 's', 't', 'b', 'l' ), mov_read_default },
|
| 1694 |
{ MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },
|
| 1695 |
{ MKTAG( 's', 't', 'd', 'p' ), mov_read_default },
|
| 1696 |
{ MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },
|
| 1697 |
{ MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */
|
| 1698 |
{ MKTAG( 's', 't', 's', 'h' ), mov_read_default },
|
| 1699 |
{ MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */
|
| 1700 |
{ MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */
|
| 1701 |
{ MKTAG( 's', 't', 't', 's' ), mov_read_stts },
|
| 1702 |
{ MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */
|
| 1703 |
{ MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },
|
| 1704 |
{ MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */
|
| 1705 |
{ MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf },
|
| 1706 |
{ MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf },
|
| 1707 |
{ MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf },
|
| 1708 |
{ MKTAG( 'u', 'u', 'i', 'd' ), mov_read_leaf },
|
| 1709 |
{ MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */
|
| 1710 |
{ MKTAG( 'w', 'a', 'v', 'e' ), mov_read_wave },
|
| 1711 |
/* extra mp4 */
|
| 1712 |
{ MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf },
|
| 1713 |
/* QT atoms */
|
| 1714 |
{ MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf },
|
| 1715 |
{ MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default },
|
| 1716 |
{ MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf },
|
| 1717 |
{ MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },
|
| 1718 |
{ MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },
|
| 1719 |
{ MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf },
|
| 1720 |
{ MKTAG( 'm', 'a', 't', 't' ), mov_read_default },
|
| 1721 |
{ MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf },
|
| 1722 |
{ MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default },
|
| 1723 |
{ MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf },
|
| 1724 |
{ MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default },
|
| 1725 |
{ MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf },
|
| 1726 |
{ MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf },
|
| 1727 |
{ MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf },
|
| 1728 |
{ MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf },
|
| 1729 |
{ MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */
|
| 1730 |
//{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf },
|
| 1731 |
#ifdef CONFIG_ZLIB
|
| 1732 |
{ MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },
|
| 1733 |
#else
|
| 1734 |
{ MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf },
|
| 1735 |
#endif
|
| 1736 |
{ 0L, mov_read_leaf }
|
| 1737 |
}; |
| 1738 |
|
| 1739 |
static void mov_free_stream_context(MOVStreamContext *sc) |
| 1740 |
{
|
| 1741 |
if(sc) {
|
| 1742 |
av_freep(&sc->chunk_offsets); |
| 1743 |
av_freep(&sc->sample_to_chunk); |
| 1744 |
av_freep(&sc->sample_sizes); |
| 1745 |
av_freep(&sc->keyframes); |
| 1746 |
av_freep(&sc->stts_data); |
| 1747 |
av_freep(&sc->ctts_data); |
| 1748 |
av_freep(&sc); |
| 1749 |
} |
| 1750 |
} |
| 1751 |
|
| 1752 |
static inline uint32_t mov_to_tag(uint8_t *buf) |
| 1753 |
{
|
| 1754 |
return MKTAG(buf[0], buf[1], buf[2], buf[3]); |
| 1755 |
} |
| 1756 |
|
| 1757 |
static inline uint32_t to_be32(uint8_t *buf) |
| 1758 |
{
|
| 1759 |
return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]; |
| 1760 |
} |
| 1761 |
|
| 1762 |
/* XXX: is it sufficient ? */
|
| 1763 |
static int mov_probe(AVProbeData *p) |
| 1764 |
{
|
| 1765 |
unsigned int offset; |
| 1766 |
uint32_t tag; |
| 1767 |
int score = 0; |
| 1768 |
|
| 1769 |
/* check file header */
|
| 1770 |
if (p->buf_size <= 12) |
| 1771 |
return 0; |
| 1772 |
offset = 0;
|
| 1773 |
for(;;) {
|
| 1774 |
/* ignore invalid offset */
|
| 1775 |
if ((offset + 8) > (unsigned int)p->buf_size) |
| 1776 |
return score;
|
| 1777 |
tag = mov_to_tag(p->buf + offset + 4);
|
| 1778 |
switch(tag) {
|
| 1779 |
/* check for obvious tags */
|
| 1780 |
case MKTAG( 'm', 'o', 'o', 'v' ): |
| 1781 |
case MKTAG( 'm', 'd', 'a', 't' ): |
| 1782 |
case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */ |
| 1783 |
case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */ |
| 1784 |
return AVPROBE_SCORE_MAX;
|
| 1785 |
/* those are more common words, so rate then a bit less */
|
| 1786 |
case MKTAG( 'w', 'i', 'd', 'e' ): |
| 1787 |
case MKTAG( 'f', 'r', 'e', 'e' ): |
| 1788 |
case MKTAG( 'j', 'u', 'n', 'k' ): |
| 1789 |
case MKTAG( 'p', 'i', 'c', 't' ): |
| 1790 |
return AVPROBE_SCORE_MAX - 5; |
| 1791 |
case MKTAG( 'f', 't', 'y', 'p' ): |
| 1792 |
case MKTAG( 's', 'k', 'i', 'p' ): |
| 1793 |
case MKTAG( 'u', 'u', 'i', 'd' ): |
| 1794 |
offset = to_be32(p->buf+offset) + offset; |
| 1795 |
/* if we only find those cause probedata is too small at least rate them */
|
| 1796 |
score = AVPROBE_SCORE_MAX - 50;
|
| 1797 |
break;
|
| 1798 |
default:
|
| 1799 |
/* unrecognized tag */
|
| 1800 |
return score;
|
| 1801 |
} |
| 1802 |
} |
| 1803 |
return score;
|
| 1804 |
} |
| 1805 |
|
| 1806 |
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap) |
| 1807 |
{
|
| 1808 |
MOVContext *mov = (MOVContext *) s->priv_data; |
| 1809 |
ByteIOContext *pb = &s->pb; |
| 1810 |
int i, j, nb, err;
|
| 1811 |
MOV_atom_t atom = { 0, 0, 0 };
|
| 1812 |
|
| 1813 |
mov->fc = s; |
| 1814 |
mov->parse_table = mov_default_parse_table; |
| 1815 |
#if 0
|
| 1816 |
/* XXX: I think we should auto detect */
|
| 1817 |
if(s->iformat->name[1] == 'p')
|
| 1818 |
mov->mp4 = 1;
|
| 1819 |
#endif
|
| 1820 |
if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */ |
| 1821 |
atom.size = url_fsize(pb); |
| 1822 |
else
|
| 1823 |
atom.size = 0x7FFFFFFFFFFFFFFFLL;
|
| 1824 |
|
| 1825 |
#ifdef DEBUG
|
| 1826 |
av_log(NULL, AV_LOG_DEBUG, "filesz=%Ld\n", atom.size); |
| 1827 |
#endif
|
| 1828 |
|
| 1829 |
/* check MOV header */
|
| 1830 |
err = mov_read_default(mov, pb, atom); |
| 1831 |
if (err<0 || (!mov->found_moov && !mov->found_mdat)) { |
| 1832 |
av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%"PRId64"\n", |
| 1833 |
err, mov->found_moov, mov->found_mdat, url_ftell(pb)); |
| 1834 |
return -1; |
| 1835 |
} |
| 1836 |
#ifdef DEBUG
|
| 1837 |
av_log(NULL, AV_LOG_DEBUG, "on_parse_exit_offset=%d\n", (int) url_ftell(pb)); |
| 1838 |
#endif
|
| 1839 |
/* some cleanup : make sure we are on the mdat atom */
|
| 1840 |
if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))
|
| 1841 |
url_fseek(pb, mov->mdat_offset, SEEK_SET); |
| 1842 |
|
| 1843 |
mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */
|
| 1844 |
|
| 1845 |
#ifdef DEBUG
|
| 1846 |
av_log(NULL, AV_LOG_DEBUG, "mdat_reset_offset=%d\n", (int) url_ftell(pb)); |
| 1847 |
#endif
|
| 1848 |
|
| 1849 |
#ifdef DEBUG
|
| 1850 |
av_log(NULL, AV_LOG_DEBUG, "streams= %d\n", s->nb_streams); |
| 1851 |
#endif
|
| 1852 |
mov->total_streams = nb = s->nb_streams; |
| 1853 |
|
| 1854 |
#if 1 |
| 1855 |
for(i=0; i<s->nb_streams;) { |
| 1856 |
if(s->streams[i]->codec->codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */ |
| 1857 |
av_free(s->streams[i]); |
| 1858 |
for(j=i+1; j<s->nb_streams; j++) |
| 1859 |
s->streams[j-1] = s->streams[j];
|
| 1860 |
s->nb_streams--; |
| 1861 |
} else
|
| 1862 |
i++; |
| 1863 |
} |
| 1864 |
for(i=0; i<s->nb_streams;i++) { |
| 1865 |
MOVStreamContext *sc; |
| 1866 |
sc = (MOVStreamContext *)s->streams[i]->priv_data; |
| 1867 |
sc->ffindex = i; |
| 1868 |
sc->is_ff_stream = 1;
|
| 1869 |
} |
| 1870 |
#endif
|
| 1871 |
#ifdef DEBUG
|
| 1872 |
av_log(NULL, AV_LOG_DEBUG, "real streams= %d\n", s->nb_streams); |
| 1873 |
#endif
|
| 1874 |
return 0; |
| 1875 |
} |
| 1876 |
|
| 1877 |
/* Yes, this is ugly... I didn't write the specs of QT :p */
|
| 1878 |
/* XXX:remove useless commented code sometime */
|
| 1879 |
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt) |
| 1880 |
{
|
| 1881 |
MOVContext *mov = (MOVContext *) s->priv_data; |
| 1882 |
MOVStreamContext *sc; |
| 1883 |
int64_t offset = INT64_MAX; |
| 1884 |
int64_t best_dts = INT64_MAX; |
| 1885 |
int i, a, b, m;
|
| 1886 |
int size;
|
| 1887 |
int idx;
|
| 1888 |
size = 0x0FFFFFFF;
|
| 1889 |
|
| 1890 |
#ifdef MOV_SPLIT_CHUNKS
|
| 1891 |
if (mov->partial) {
|
| 1892 |
sc = mov->partial; |
| 1893 |
idx = sc->sample_to_chunk_index; |
| 1894 |
|
| 1895 |
if (idx < 0) return 0; |
| 1896 |
#ifdef DEBUG
|
| 1897 |
fprintf(stderr, "sc[ffid %d]->sample_size = %d\n", sc->ffindex, sc->sample_size);
|
| 1898 |
#endif
|
| 1899 |
//size = sc->sample_sizes[sc->current_sample];
|
| 1900 |
// that ain't working...
|
| 1901 |
//size = (sc->sample_size)?sc->sample_size:sc->sample_sizes[sc->current_sample];
|
| 1902 |
size = (sc->sample_size > 1)?sc->sample_size:sc->sample_sizes[sc->current_sample];
|
| 1903 |
|
| 1904 |
sc->current_sample++; |
| 1905 |
sc->left_in_chunk--; |
| 1906 |
|
| 1907 |
if (sc->left_in_chunk <= 0) |
| 1908 |
mov->partial = 0;
|
| 1909 |
offset = mov->next_chunk_offset; |
| 1910 |
/* extract the sample */
|
| 1911 |
|
| 1912 |
goto readchunk;
|
| 1913 |
} |
| 1914 |
#endif
|
| 1915 |
|
| 1916 |
again:
|
| 1917 |
sc = 0;
|
| 1918 |
if(offset == INT64_MAX)
|
| 1919 |
best_dts= INT64_MAX; |
| 1920 |
for(i=0; i<mov->total_streams; i++) { |
| 1921 |
MOVStreamContext *msc = mov->streams[i]; |
| 1922 |
|
| 1923 |
if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0){ |
| 1924 |
if (msc->sample_to_time_index < msc->stts_count && mov->ni) {
|
| 1925 |
int64_t dts; |
| 1926 |
int index= msc->sample_to_time_index;
|
| 1927 |
int sample= msc->sample_to_time_sample;
|
| 1928 |
int time= msc->sample_to_time_time;
|
| 1929 |
int duration = msc->stts_data[index].duration;
|
| 1930 |
int count = msc->stts_data[index].count;
|
| 1931 |
if (sample + count < msc->current_sample) {
|
| 1932 |
sample += count; |
| 1933 |
time += count*duration; |
| 1934 |
index ++; |
| 1935 |
duration = msc->stts_data[index].duration; |
| 1936 |
} |
| 1937 |
dts = time + (msc->current_sample-1 - sample) * (int64_t)duration;
|
| 1938 |
dts = av_rescale(dts, AV_TIME_BASE, msc->time_scale); |
| 1939 |
// av_log(NULL, AV_LOG_DEBUG, "%d %Ld %Ld %Ld \n", i, dts, best_dts, offset);
|
| 1940 |
if(dts < best_dts){
|
| 1941 |
best_dts= dts; |
| 1942 |
sc = msc; |
| 1943 |
offset = msc->chunk_offsets[msc->next_chunk]; |
| 1944 |
} |
| 1945 |
}else{
|
| 1946 |
//av_log(NULL, AV_LOG_DEBUG, "MOCHUNK %ld %d %p pos:%Ld\n", mov->streams[i]->next_chunk, mov->total_streams, mov->streams[i], url_ftell(&s->pb));
|
| 1947 |
if ((msc->chunk_offsets[msc->next_chunk] < offset)) {
|
| 1948 |
sc = msc; |
| 1949 |
offset = msc->chunk_offsets[msc->next_chunk]; |
| 1950 |
//av_log(NULL, AV_LOG_DEBUG, "SELETED %Ld i:%d\n", offset, i);
|
| 1951 |
} |
| 1952 |
} |
| 1953 |
} |
| 1954 |
} |
| 1955 |
if (!sc || offset==INT64_MAX)
|
| 1956 |
return -1; |
| 1957 |
|
| 1958 |
sc->next_chunk++; |
| 1959 |
|
| 1960 |
if(mov->next_chunk_offset < offset) { /* some meta data */ |
| 1961 |
url_fskip(&s->pb, (offset - mov->next_chunk_offset)); |
| 1962 |
mov->next_chunk_offset = offset; |
| 1963 |
} |
| 1964 |
|
| 1965 |
//av_log(NULL, AV_LOG_DEBUG, "chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);
|
| 1966 |
if(!sc->is_ff_stream || (s->streams[sc->ffindex]->discard >= AVDISCARD_ALL)) {
|
| 1967 |
url_fskip(&s->pb, (offset - mov->next_chunk_offset)); |
| 1968 |
mov->next_chunk_offset = offset; |
| 1969 |
offset = INT64_MAX; |
| 1970 |
goto again;
|
| 1971 |
} |
| 1972 |
|
| 1973 |
/* now get the chunk size... */
|
| 1974 |
|
| 1975 |
for(i=0; i<mov->total_streams; i++) { |
| 1976 |
MOVStreamContext *msc = mov->streams[i]; |
| 1977 |
if ((msc->next_chunk < msc->chunk_count)
|
| 1978 |
&& msc->chunk_offsets[msc->next_chunk] - offset < size |
| 1979 |
&& msc->chunk_offsets[msc->next_chunk] > offset) |
| 1980 |
size = msc->chunk_offsets[msc->next_chunk] - offset; |
| 1981 |
} |
| 1982 |
|
| 1983 |
#ifdef MOV_MINOLTA_FIX
|
| 1984 |
//Make sure that size is according to sample_size (Needed by .mov files
|
| 1985 |
//created on a Minolta Dimage Xi where audio chunks contains waste data in the end)
|
| 1986 |
//Maybe we should really not only check sc->sample_size, but also sc->sample_sizes
|
| 1987 |
//but I have no such movies
|
| 1988 |
if (sc->sample_size > 0) { |
| 1989 |
int foundsize=0; |
| 1990 |
for(i=0; i<(sc->sample_to_chunk_sz); i++) { |
| 1991 |
if( (sc->sample_to_chunk[i].first)<=(sc->next_chunk) )
|
| 1992 |
{
|
| 1993 |
// I can't figure out why for PCM audio sample_size is always 1
|
| 1994 |
// (it should actually be channels*bits_per_second/8) but it is.
|
| 1995 |
AVCodecContext* cod = s->streams[sc->ffindex]->codec; |
| 1996 |
if (sc->sample_size == 1 && (cod->codec_id == CODEC_ID_PCM_S16BE || cod->codec_id == CODEC_ID_PCM_S16LE)) |
| 1997 |
foundsize=(sc->sample_to_chunk[i].count*cod->channels*cod->bits_per_sample)/8;
|
| 1998 |
else
|
| 1999 |
foundsize=sc->sample_to_chunk[i].count*sc->sample_size; |
| 2000 |
} |
| 2001 |
#ifdef DEBUG
|
| 2002 |
av_log(NULL, AV_LOG_DEBUG, "sample_to_chunk first=%ld count=%ld, id=%ld\n", sc->sample_to_chunk[i].first, sc->sample_to_chunk[i].count, sc->sample_to_chunk[i].id); |
| 2003 |
#endif
|
| 2004 |
} |
| 2005 |
if( (foundsize>0) && (foundsize<size) ) |
| 2006 |
{
|
| 2007 |
#ifdef DEBUG
|
| 2008 |
/*av_log(NULL, AV_LOG_DEBUG, "this size should actually be %d\n",foundsize);*/
|
| 2009 |
#endif
|
| 2010 |
size=foundsize; |
| 2011 |
} |
| 2012 |
} |
| 2013 |
#endif //MOV_MINOLTA_FIX |
| 2014 |
|
| 2015 |
idx = sc->sample_to_chunk_index; |
| 2016 |
if (idx + 1 < sc->sample_to_chunk_sz && sc->next_chunk >= sc->sample_to_chunk[idx + 1].first) |
| 2017 |
idx++; |
| 2018 |
sc->sample_to_chunk_index = idx; |
| 2019 |
#ifdef MOV_SPLIT_CHUNKS
|
| 2020 |
/* split chunks into samples */
|
| 2021 |
if (sc->sample_size == 0 || sc->sample_size > 100) { |
| 2022 |
if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) { |
| 2023 |
mov->partial = sc; |
| 2024 |
/* we'll have to get those samples before next chunk */
|
| 2025 |
sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;
|
| 2026 |
size = (sc->sample_size > 1)?sc->sample_size:sc->sample_sizes[sc->current_sample];
|
| 2027 |
} |
| 2028 |
|
| 2029 |
sc->current_sample++; |
| 2030 |
}else if(idx + 1 < sc->sample_to_chunk_sz){ |
| 2031 |
sc->current_sample += sc->sample_size * sc->sample_to_chunk[idx].count; |
| 2032 |
} |
| 2033 |
#endif
|
| 2034 |
|
| 2035 |
readchunk:
|
| 2036 |
#ifdef DEBUG
|
| 2037 |
av_log(NULL, AV_LOG_DEBUG, "chunk: %lli -> %lli (%i)\n", offset, offset + size, size); |
| 2038 |
#endif
|
| 2039 |
if(size == 0x0FFFFFFF) |
| 2040 |
size = mov->mdat_size + mov->mdat_offset - offset; |
| 2041 |
if(size < 0) |
| 2042 |
return -1; |
| 2043 |
if(size == 0) |
| 2044 |
return -1; |
| 2045 |
url_fseek(&s->pb, offset, SEEK_SET); |
| 2046 |
|
| 2047 |
av_get_packet(&s->pb, pkt, size); |
| 2048 |
pkt->stream_index = sc->ffindex; |
| 2049 |
|
| 2050 |
// If the keyframes table exists, mark any samples that are in the table as key frames.
|
| 2051 |
// If no table exists, treat very sample as a key frame.
|
| 2052 |
if (sc->keyframes) {
|
| 2053 |
a = 0;
|
| 2054 |
b = sc->keyframe_count - 1;
|
| 2055 |
|
| 2056 |
while (a < b) {
|
| 2057 |
m = (a + b + 1) >> 1; |
| 2058 |
if (sc->keyframes[m] > sc->current_sample) {
|
| 2059 |
b = m - 1;
|
| 2060 |
} else {
|
| 2061 |
a = m; |
| 2062 |
} |
| 2063 |
} |
| 2064 |
|
| 2065 |
if (sc->keyframes[a] == sc->current_sample)
|
| 2066 |
pkt->flags |= PKT_FLAG_KEY; |
| 2067 |
} |
| 2068 |
else
|
| 2069 |
pkt->flags |= PKT_FLAG_KEY; |
| 2070 |
|
| 2071 |
#ifdef DEBUG
|
| 2072 |
/*
|
| 2073 |
av_log(NULL, AV_LOG_DEBUG, "Packet (%d, %ld) ", pkt->stream_index, pkt->size);
|
| 2074 |
for(i=0; i<8; i++)
|
| 2075 |
av_log(NULL, AV_LOG_DEBUG, "%02x ", pkt->data[i]);
|
| 2076 |
for(i=0; i<8; i++)
|
| 2077 |
av_log(NULL, AV_LOG_DEBUG, "%c ", (pkt->data[i]) & 0x7F);
|
| 2078 |
av_log(NULL, AV_LOG_DEBUG, "\n");
|
| 2079 |
*/
|
| 2080 |
#endif
|
| 2081 |
|
| 2082 |
mov->next_chunk_offset = offset + size; |
| 2083 |
|
| 2084 |
/* find the corresponding dts */
|
| 2085 |
if (sc && sc->sample_to_time_index < sc->stts_count && pkt) {
|
| 2086 |
unsigned int count; |
| 2087 |
uint64_t dts, pts; |
| 2088 |
unsigned int duration = sc->stts_data[sc->sample_to_time_index].duration; |
| 2089 |
count = sc->stts_data[sc->sample_to_time_index].count; |
| 2090 |
if ((sc->sample_to_time_sample + count) < sc->current_sample) {
|
| 2091 |
sc->sample_to_time_sample += count; |
| 2092 |
sc->sample_to_time_time += count*duration; |
| 2093 |
sc->sample_to_time_index ++; |
| 2094 |
duration = sc->stts_data[sc->sample_to_time_index].duration; |
| 2095 |
} |
| 2096 |
dts = sc->sample_to_time_time + (sc->current_sample-1 - sc->sample_to_time_sample) * (int64_t)duration;
|
| 2097 |
/* find the corresponding pts */
|
| 2098 |
if (sc->sample_to_ctime_index < sc->ctts_count) {
|
| 2099 |
int duration = sc->ctts_data[sc->sample_to_ctime_index].duration;
|
| 2100 |
int count = sc->ctts_data[sc->sample_to_ctime_index].count;
|
| 2101 |
|
| 2102 |
if ((sc->sample_to_ctime_sample + count) < sc->current_sample) {
|
| 2103 |
sc->sample_to_ctime_sample += count; |
| 2104 |
sc->sample_to_ctime_index ++; |
| 2105 |
duration = sc->ctts_data[sc->sample_to_ctime_index].duration; |
| 2106 |
} |
| 2107 |
pts = dts + duration; |
| 2108 |
}else
|
| 2109 |
pts = dts; |
| 2110 |
pkt->pts = pts; |
| 2111 |
pkt->dts = dts; |
| 2112 |
#ifdef DEBUG
|
| 2113 |
av_log(NULL, AV_LOG_DEBUG, "stream #%d smp #%ld dts = %lld pts = %lld (smp:%ld time:%lld idx:%d ent:%d count:%d dur:%d)\n" |
| 2114 |
, pkt->stream_index, sc->current_sample-1, pkt->dts, pkt->pts
|
| 2115 |
, sc->sample_to_time_sample |
| 2116 |
, sc->sample_to_time_time |
| 2117 |
, sc->sample_to_time_index |
| 2118 |
, sc->stts_count |
| 2119 |
, count |
| 2120 |
, duration); |
| 2121 |
#endif
|
| 2122 |
} |
| 2123 |
|
| 2124 |
return 0; |
| 2125 |
} |
| 2126 |
|
| 2127 |
#if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)
|
| 2128 |
/**
|
| 2129 |
* Seek method based on the one described in the Appendix C of QTFileFormat.pdf
|
| 2130 |
*/
|
| 2131 |
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags) |
| 2132 |
{
|
| 2133 |
MOVContext* mov = (MOVContext *) s->priv_data; |
| 2134 |
MOVStreamContext* sc; |
| 2135 |
int32_t i, a, b, m; |
| 2136 |
int64_t start_time; |
| 2137 |
int32_t seek_sample, sample; |
| 2138 |
int32_t duration; |
| 2139 |
int32_t count; |
| 2140 |
int32_t chunk; |
| 2141 |
int32_t left_in_chunk; |
| 2142 |
int64_t chunk_file_offset; |
| 2143 |
int64_t sample_file_offset; |
| 2144 |
int32_t first_chunk_sample; |
| 2145 |
int32_t sample_to_chunk_idx; |
| 2146 |
int sample_to_time_index;
|
| 2147 |
long sample_to_time_sample = 0; |
| 2148 |
uint64_t sample_to_time_time = 0;
|
| 2149 |
int mov_idx;
|
| 2150 |
|
| 2151 |
// Find the corresponding mov stream
|
| 2152 |
for (mov_idx = 0; mov_idx < mov->total_streams; mov_idx++) |
| 2153 |
if (mov->streams[mov_idx]->ffindex == stream_index)
|
| 2154 |
break;
|
| 2155 |
if (mov_idx == mov->total_streams) {
|
| 2156 |
av_log(s, AV_LOG_ERROR, "mov: requested stream was not found in mov streams (idx=%i)\n", stream_index);
|
| 2157 |
return -1; |
| 2158 |
} |
| 2159 |
sc = mov->streams[mov_idx]; |
| 2160 |
|
| 2161 |
// Step 1. Find the edit that contains the requested time (elst)
|
| 2162 |
if (sc->edit_count) {
|
| 2163 |
// FIXME should handle edit list
|
| 2164 |
av_log(s, AV_LOG_ERROR, "mov: does not handle seeking in files that contain edit list (c:%d)\n", sc->edit_count);
|
| 2165 |
return -1; |
| 2166 |
} |
| 2167 |
|
| 2168 |
// Step 2. Find the corresponding sample using the Time-to-sample atom (stts) */
|
| 2169 |
#ifdef DEBUG
|
| 2170 |
av_log(s, AV_LOG_DEBUG, "Searching for time %li in stream #%i (time_scale=%i)\n", (long)timestamp, mov_idx, sc->time_scale); |
| 2171 |
#endif
|
| 2172 |
start_time = 0; // FIXME use elst atom |
| 2173 |
sample = 1; // sample are 0 based in table |
| 2174 |
#ifdef DEBUG
|
| 2175 |
av_log(s, AV_LOG_DEBUG, "Searching for sample_time %li \n", (long)sample_time); |
| 2176 |
#endif
|
| 2177 |
for (i = 0; i < sc->stts_count; i++) { |
| 2178 |
count = sc->stts_data[i].count; |
| 2179 |
duration = sc->stts_data[i].duration; |
| 2180 |
//av_log(s, AV_LOG_DEBUG, "> sample_time %lli \n", (long)sample_time);
|
| 2181 |
//av_log(s, AV_LOG_DEBUG, "> count=%i duration=%i\n", count, duration);
|
| 2182 |
if ((start_time + count*duration) > sample_time) {
|
| 2183 |
sample_to_time_time = start_time; |
| 2184 |
sample_to_time_index = i; |
| 2185 |
sample_to_time_sample = sample; |
| 2186 |
sample += (sample_time - start_time) / duration; |
| 2187 |
break;
|
| 2188 |
} |
| 2189 |
sample += count; |
| 2190 |
start_time += count * duration; |
| 2191 |
} |
| 2192 |
sample_to_time_time = start_time; |
| 2193 |
sample_to_time_index = i; |
| 2194 |
/* NOTE: despite what qt doc say, the dt value (Display Time in qt vocabulary) computed with the stts atom
|
| 2195 |
is a decoding time stamp (dts) not a presentation time stamp. And as usual dts != pts for stream with b frames */
|
| 2196 |
|
| 2197 |
#ifdef DEBUG
|
| 2198 |
av_log(s, AV_LOG_DEBUG, "Found time %li at sample #%u\n", (long)sample_time, sample); |
| 2199 |
#endif
|
| 2200 |
if (sample > sc->sample_count) {
|
| 2201 |
av_log(s, AV_LOG_ERROR, "mov: sample pos is too high, unable to seek (req. sample=%i, sample count=%ld)\n", sample, sc->sample_count);
|
| 2202 |
return -1; |
| 2203 |
} |
| 2204 |
|
| 2205 |
// Step 3. Find the prior sync. sample using the Sync sample atom (stss)
|
| 2206 |
if (sc->keyframes) {
|
| 2207 |
a = 0;
|
| 2208 |
b = sc->keyframe_count - 1;
|
| 2209 |
while (a < b) {
|
| 2210 |
m = (a + b + 1) >> 1; |
| 2211 |
if (sc->keyframes[m] > sample) {
|
| 2212 |
b = m - 1;
|
| 2213 |
} else {
|
| 2214 |
a = m; |
| 2215 |
} |
| 2216 |
#ifdef DEBUG
|
| 2217 |
// av_log(s, AV_LOG_DEBUG, "a=%i (%i) b=%i (%i) m=%i (%i) stream #%i\n", a, sc->keyframes[a], b, sc->keyframes[b], m, sc->keyframes[m], mov_idx);
|
| 2218 |
#endif
|
| 2219 |
} |
| 2220 |
// for low latency prob: always use the previous keyframe, just uncomment the next line
|
| 2221 |
// if (a) a--;
|
| 2222 |
seek_sample = sc->keyframes[a]; |
| 2223 |
} |
| 2224 |
else
|
| 2225 |
seek_sample = sample; // else all samples are key frames
|
| 2226 |
#ifdef DEBUG
|
| 2227 |
av_log(s, AV_LOG_DEBUG, "Found nearest keyframe at sample #%i \n", seek_sample);
|
| 2228 |
#endif
|
| 2229 |
|
| 2230 |
// Step 4. Find the chunk of the sample using the Sample-to-chunk-atom (stsc)
|
| 2231 |
for (first_chunk_sample = 1, i = 0; i < (sc->sample_to_chunk_sz - 1); i++) { |
| 2232 |
b = (sc->sample_to_chunk[i + 1].first - sc->sample_to_chunk[i].first) * sc->sample_to_chunk[i].count;
|
| 2233 |
if (seek_sample >= first_chunk_sample && seek_sample < (first_chunk_sample + b))
|
| 2234 |
break;
|
| 2235 |
first_chunk_sample += b; |
| 2236 |
} |
| 2237 |
chunk = sc->sample_to_chunk[i].first + (seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count; |
| 2238 |
left_in_chunk = sc->sample_to_chunk[i].count - (seek_sample - first_chunk_sample) % sc->sample_to_chunk[i].count; |
| 2239 |
first_chunk_sample += ((seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count) * sc->sample_to_chunk[i].count; |
| 2240 |
sample_to_chunk_idx = i; |
| 2241 |
#ifdef DEBUG
|
| 2242 |
av_log(s, AV_LOG_DEBUG, "Sample was found in chunk #%i at sample offset %i (idx %i)\n", chunk, seek_sample - first_chunk_sample, sample_to_chunk_idx);
|
| 2243 |
#endif
|
| 2244 |
|
| 2245 |
// Step 5. Find the offset of the chunk using the chunk offset atom
|
| 2246 |
if (!sc->chunk_offsets) {
|
| 2247 |
av_log(s, AV_LOG_ERROR, "mov: no chunk offset atom, unable to seek\n");
|
| 2248 |
return -1; |
| 2249 |
} |
| 2250 |
if (chunk > sc->chunk_count) {
|
| 2251 |
av_log(s, AV_LOG_ERROR, "mov: chunk offset atom too short, unable to seek (req. chunk=%i, chunk count=%li)\n", chunk, sc->chunk_count);
|
| 2252 |
return -1; |
| 2253 |
} |
| 2254 |
chunk_file_offset = sc->chunk_offsets[chunk - 1];
|
| 2255 |
#ifdef DEBUG
|
| 2256 |
av_log(s, AV_LOG_DEBUG, "Chunk file offset is #%llu \n", chunk_file_offset);
|
| 2257 |
#endif
|
| 2258 |
|
| 2259 |
// Step 6. Find the byte offset within the chunk using the sample size atom
|
| 2260 |
sample_file_offset = chunk_file_offset; |
| 2261 |
if (sc->sample_size)
|
| 2262 |
sample_file_offset += (seek_sample - first_chunk_sample) * sc->sample_size; |
| 2263 |
else {
|
| 2264 |
for (i = 0; i < (seek_sample - first_chunk_sample); i++) { |
| 2265 |
sample_file_offset += sc->sample_sizes[first_chunk_sample + i - 1];
|
| 2266 |
} |
| 2267 |
} |
| 2268 |
#ifdef DEBUG
|
| 2269 |
av_log(s, AV_LOG_DEBUG, "Sample file offset is #%llu \n", sample_file_offset);
|
| 2270 |
#endif
|
| 2271 |
|
| 2272 |
// Step 6. Update the parser
|
| 2273 |
mov->partial = sc; |
| 2274 |
mov->next_chunk_offset = sample_file_offset; |
| 2275 |
// Update current stream state
|
| 2276 |
sc->current_sample = seek_sample - 1; // zero based |
| 2277 |
sc->left_in_chunk = left_in_chunk; |
| 2278 |
sc->next_chunk = chunk; // +1 -1 (zero based)
|
| 2279 |
sc->sample_to_chunk_index = sample_to_chunk_idx; |
| 2280 |
|
| 2281 |
// Update other streams
|
| 2282 |
for (i = 0; i<mov->total_streams; i++) { |
| 2283 |
MOVStreamContext *msc; |
| 2284 |
if (i == mov_idx) continue; |
| 2285 |
// Find the nearest 'next' chunk
|
| 2286 |
msc = mov->streams[i]; |
| 2287 |
a = 0;
|
| 2288 |
b = msc->chunk_count - 1;
|
| 2289 |
while (a < b) {
|
| 2290 |
m = (a + b + 1) >> 1; |
| 2291 |
if (msc->chunk_offsets[m] > chunk_file_offset) {
|
| 2292 |
b = m - 1;
|
| 2293 |
} else {
|
| 2294 |
a = m; |
| 2295 |
} |
| 2296 |
#ifdef DEBUG
|
| 2297 |
/* av_log(s, AV_LOG_DEBUG, "a=%i (%li) b=%i (%li) m=%i (%li) stream #%i\n"
|
| 2298 |
, a, (long)msc->chunk_offsets[a], b, (long)msc->chunk_offsets[b], m, (long)msc->chunk_offsets[m], i); */
|
| 2299 |
#endif
|
| 2300 |
} |
| 2301 |
msc->next_chunk = a; |
| 2302 |
if (msc->chunk_offsets[a] < chunk_file_offset && a < (msc->chunk_count-1)) |
| 2303 |
msc->next_chunk ++; |
| 2304 |
#ifdef DEBUG
|
| 2305 |
av_log(s, AV_LOG_DEBUG, "Nearest next chunk for stream #%i is #%i @%lli\n", i, msc->next_chunk+1, msc->chunk_offsets[msc->next_chunk]); |
| 2306 |
#endif
|
| 2307 |
// Compute sample count and index in the sample_to_chunk table (what a pity)
|
| 2308 |
msc->sample_to_chunk_index = 0;
|
| 2309 |
msc->current_sample = 0;
|
| 2310 |
for(; msc->sample_to_chunk_index < (msc->sample_to_chunk_sz - 1) |
| 2311 |
&& msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first <= (1 + msc->next_chunk); msc->sample_to_chunk_index++) { |
| 2312 |
msc->current_sample += (msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first - msc->sample_to_chunk[msc->sample_to_chunk_index].first) \
|
| 2313 |
* msc->sample_to_chunk[msc->sample_to_chunk_index].count; |
| 2314 |
} |
| 2315 |
msc->current_sample += (msc->next_chunk - (msc->sample_to_chunk[msc->sample_to_chunk_index].first - 1)) * sc->sample_to_chunk[msc->sample_to_chunk_index].count;
|
| 2316 |
msc->left_in_chunk = msc->sample_to_chunk[msc->sample_to_chunk_index].count - 1;
|
| 2317 |
// Find corresponding position in stts (used later to compute dts)
|
| 2318 |
sample = 0;
|
| 2319 |
start_time = 0;
|
| 2320 |
for (msc->sample_to_time_index = 0; msc->sample_to_time_index < msc->stts_count; msc->sample_to_time_index++) { |
| 2321 |
count = msc->stts_data[msc->sample_to_time_index].count; |
| 2322 |
duration = msc->stts_data[msc->sample_to_time_index].duration; |
| 2323 |
if ((sample + count - 1) > msc->current_sample) { |
| 2324 |
msc->sample_to_time_time = start_time; |
| 2325 |
msc->sample_to_time_sample = sample; |
| 2326 |
break;
|
| 2327 |
} |
| 2328 |
sample += count; |
| 2329 |
start_time += count * duration; |
| 2330 |
} |
| 2331 |
sample = 0;
|
| 2332 |
for (msc->sample_to_ctime_index = 0; msc->sample_to_ctime_index < msc->ctts_count; msc->sample_to_ctime_index++) { |
| 2333 |
count = msc->ctts_data[msc->sample_to_ctime_index].count; |
| 2334 |
duration = msc->ctts_data[msc->sample_to_ctime_index].duration; |
| 2335 |
if ((sample + count - 1) > msc->current_sample) { |
| 2336 |
msc->sample_to_ctime_sample = sample; |
| 2337 |
break;
|
| 2338 |
} |
| 2339 |
sample += count; |
| 2340 |
} |
| 2341 |
#ifdef DEBUG
|
| 2342 |
av_log(s, AV_LOG_DEBUG, "Next Sample for stream #%i is #%i @%i\n", i, msc->current_sample + 1, msc->sample_to_chunk_index + 1); |
| 2343 |
#endif
|
| 2344 |
} |
| 2345 |
return 0; |
| 2346 |
} |
| 2347 |
#endif
|
| 2348 |
|
| 2349 |
static int mov_read_close(AVFormatContext *s) |
| 2350 |
{
|
| 2351 |
int i;
|
| 2352 |
MOVContext *mov = (MOVContext *) s->priv_data; |
| 2353 |
for(i=0; i<mov->total_streams; i++) |
| 2354 |
mov_free_stream_context(mov->streams[i]); |
| 2355 |
/* free color tabs */
|
| 2356 |
for(i=0; i<mov->ctab_size; i++) |
| 2357 |
av_freep(&mov->ctab[i]); |
| 2358 |
av_freep(&mov->ctab); |
| 2359 |
return 0; |
| 2360 |
} |
| 2361 |
|
| 2362 |
static AVInputFormat mov_iformat = {
|
| 2363 |
"mov,mp4,m4a,3gp,3g2",
|
| 2364 |
"QuickTime/MPEG4 format",
|
| 2365 |
sizeof(MOVContext),
|
| 2366 |
mov_probe, |
| 2367 |
mov_read_header, |
| 2368 |
mov_read_packet, |
| 2369 |
mov_read_close, |
| 2370 |
#if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)
|
| 2371 |
mov_read_seek, |
| 2372 |
#endif
|
| 2373 |
}; |
| 2374 |
|
| 2375 |
int mov_init(void) |
| 2376 |
{
|
| 2377 |
av_register_input_format(&mov_iformat); |
| 2378 |
return 0; |
| 2379 |
} |