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ffmpeg / libavformat / mov.c @ d9b1c197

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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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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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/* 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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157
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;
174
} MOV_ctab_t;
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176
typedef struct {
177
    uint8_t  version;
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    uint32_t flags; // 24bit
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180
    /* 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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203
    /* 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
209
     * 1bit  reserved
210
     */
211
    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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215
    /* 0x05 DecSpecificDescrTag */
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    uint8_t  decoder_cfg_len;
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    uint8_t *decoder_cfg;
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219
    /* 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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224
struct MOVParseTableEntry;
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226
typedef struct Time2Sample{
227
    int count;
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    int duration;
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}Time2Sample;
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231
typedef struct MOVStreamContext {
232
    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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261
typedef struct MOVContext {
262
    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) */
263
    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
273
     * but we need the info to be able to skip data from those streams in the 'mdat' section
274
     */
275
    MOVStreamContext *streams[MAX_STREAMS];
276

    
277
    int64_t next_chunk_offset;
278
    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 */
281
    const struct MOVParseTableEntry *parse_table; /* could be eventually used to change the table */
282
    /* NOTE: for recursion save to/ restore from local variable! */
283

    
284
    AVPaletteControl palette_control;
285
} MOVContext;
286

    
287

    
288
/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
289

    
290
/* those functions parse an atom */
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/* return code:
292
 1: found what I wanted, exit
293
 0: continue to parse next atom
294
 -1: error occured, exit
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 */
296
typedef int (*mov_parse_function)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom);
297

    
298
/* links atom IDs to parse functions */
299
typedef struct MOVParseTableEntry {
300
    uint32_t type;
301
    mov_parse_function func;
302
} MOVParseTableEntry;
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#ifdef DEBUG
305
/*
306
 * XXX: static sux, even more in a multithreaded environment...
307
 * Avoid them. This is here just to help debugging.
308
 */
309
static int debug_indent = 0;
310
void print_atom(const char *str, MOV_atom_t atom)
311
{
312
    unsigned int tag, i;
313
    tag = (unsigned int) atom.type;
314
    i=debug_indent;
315
    if(tag == 0) tag = MKTAG('N', 'U', 'L', 'L');
316
    while(i--)
317
        av_log(NULL, AV_LOG_DEBUG, "|");
318
    av_log(NULL, AV_LOG_DEBUG, "parse:");
319
    av_log(NULL, AV_LOG_DEBUG, " %s: tag=%c%c%c%c offset=0x%x size=0x%x\n",
320
           str, tag & 0xff,
321
           (tag >> 8) & 0xff,
322
           (tag >> 16) & 0xff,
323
           (tag >> 24) & 0xff,
324
           (unsigned int)atom.offset,
325
           (unsigned int)atom.size);
326
    assert((unsigned int)atom.size < 0x7fffffff);// catching errors
327
}
328
#else
329
#define print_atom(a,b)
330
#endif
331

    
332

    
333
static int mov_read_leaf(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
334
{
335
    print_atom("leaf", atom);
336

    
337
    if (atom.size>1)
338
        url_fskip(pb, atom.size);
339
/*        url_seek(pb, atom_offset+atom.size, SEEK_SET); */
340
    return 0;
341
}
342

    
343
static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
344
{
345
    int64_t total_size = 0;
346
    MOV_atom_t a;
347
    int i;
348
    int err = 0;
349

    
350
#ifdef DEBUG
351
    print_atom("default", atom);
352
    debug_indent++;
353
#endif
354

    
355
    a.offset = atom.offset;
356

    
357
    if (atom.size < 0)
358
        atom.size = 0x7fffffffffffffffLL;
359
    while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {
360
        a.size = atom.size;
361
        a.type=0L;
362
        if(atom.size >= 8) {
363
            a.size = get_be32(pb);
364
            a.type = get_le32(pb);
365
        }
366
        total_size += 8;
367
        a.offset += 8;
368
        //av_log(NULL, AV_LOG_DEBUG, "type: %08x  %.4s  sz: %Lx  %Lx   %Lx\n", type, (char*)&type, size, atom.size, total_size);
369
        if (a.size == 1) { /* 64 bit extended size */
370
            a.size = get_be64(pb) - 8;
371
            a.offset += 8;
372
            total_size += 8;
373
        }
374
        if (a.size == 0) {
375
            a.size = atom.size - total_size;
376
            if (a.size <= 8)
377
                break;
378
        }
379
        for (i = 0; c->parse_table[i].type != 0L
380
             && c->parse_table[i].type != a.type; i++)
381
            /* empty */;
382

    
383
        a.size -= 8;
384
        
385
        if(a.size < 0)
386
            break;
387
        
388
//        av_log(NULL, AV_LOG_DEBUG, " i=%ld\n", i);
389
        if (c->parse_table[i].type == 0) { /* skip leaf atoms data */
390
//            url_seek(pb, atom.offset+atom.size, SEEK_SET);
391
#ifdef DEBUG
392
            print_atom("unknown", a);
393
#endif
394
            url_fskip(pb, a.size);
395
        } else {
396
#ifdef DEBUG
397
            //char b[5] = { type & 0xff, (type >> 8) & 0xff, (type >> 16) & 0xff, (type >> 24) & 0xff, 0 };
398
            //print_atom(b, type, offset, size);
399
#endif
400
            err = (c->parse_table[i].func)(c, pb, a);
401
        }
402

    
403
        a.offset += a.size;
404
        total_size += a.size;
405
    }
406

    
407
    if (!err && total_size < atom.size && atom.size < 0x7ffff) {
408
        //av_log(NULL, AV_LOG_DEBUG, "RESET  %Ld  %Ld  err:%d\n", atom.size, total_size, err);
409
        url_fskip(pb, atom.size - total_size);
410
    }
411

    
412
#ifdef DEBUG
413
    debug_indent--;
414
#endif
415
    return err;
416
}
417

    
418
static int mov_read_ctab(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
419
{
420
#if 1
421
    url_fskip(pb, atom.size); // for now
422
#else
423
    VERY VERY BROKEN, NEVER execute this, needs rewrite
424
    unsigned int len;
425
    MOV_ctab_t *t;
426
    c->ctab = av_realloc(c->ctab, ++c->ctab_size);
427
    t = c->ctab[c->ctab_size];
428
    t->seed = get_be32(pb);
429
    t->flags = get_be16(pb);
430
    t->size = get_be16(pb) + 1;
431
    len = 2 * t->size * 4;
432
    if (len > 0) {
433
        t->clrs = av_malloc(len); // 16bit A R G B
434
        if (t->clrs)
435
            get_buffer(pb, t->clrs, len);
436
    }
437
#endif
438

    
439
    return 0;
440
}
441

    
442
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
443
{
444
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
445
    int len = 0;
446
    uint32_t type;
447
    uint32_t ctype;
448

    
449
    print_atom("hdlr", atom);
450

    
451
    get_byte(pb); /* version */
452
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
453

    
454
    /* component type */
455
    ctype = get_le32(pb);
456
    type = get_le32(pb); /* component subtype */
457

    
458
#ifdef DEBUG
459
    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);
460
    av_log(NULL, AV_LOG_DEBUG, "stype= %c%c%c%c\n", *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);
461
#endif
462
#ifdef DEBUG
463
/* XXX: yeah this is ugly... */
464
    if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */
465
        if(type == MKTAG('v', 'i', 'd', 'e'))
466
            puts("hdlr: vide");
467
        else if(type == MKTAG('s', 'o', 'u', 'n'))
468
            puts("hdlr: soun");
469
    } else if(ctype == 0) { /* MP4 */
470
        if(type == MKTAG('v', 'i', 'd', 'e'))
471
            puts("hdlr: vide");
472
        else if(type == MKTAG('s', 'o', 'u', 'n'))
473
            puts("hdlr: soun");
474
        else if(type == MKTAG('o', 'd', 's', 'm'))
475
            puts("hdlr: odsm");
476
        else if(type == MKTAG('s', 'd', 's', 'm'))
477
            puts("hdlr: sdsm");
478
    } else puts("hdlr: meta");
479
#endif
480

    
481
    if(ctype == MKTAG('m', 'h', 'l', 'r')) { /* MOV */
482
        /* helps parsing the string hereafter... */
483
        c->mp4 = 0;
484
        if(type == MKTAG('v', 'i', 'd', 'e'))
485
            st->codec->codec_type = CODEC_TYPE_VIDEO;
486
        else if(type == MKTAG('s', 'o', 'u', 'n'))
487
            st->codec->codec_type = CODEC_TYPE_AUDIO;
488
    } else if(ctype == 0) { /* MP4 */
489
        /* helps parsing the string hereafter... */
490
        c->mp4 = 1;
491
        if(type == MKTAG('v', 'i', 'd', 'e'))
492
            st->codec->codec_type = CODEC_TYPE_VIDEO;
493
        else if(type == MKTAG('s', 'o', 'u', 'n'))
494
            st->codec->codec_type = CODEC_TYPE_AUDIO;
495
    }
496
    get_be32(pb); /* component  manufacture */
497
    get_be32(pb); /* component flags */
498
    get_be32(pb); /* component flags mask */
499

    
500
    if(atom.size <= 24)
501
        return 0; /* nothing left to read */
502
    /* XXX: MP4 uses a C string, not a pascal one */
503
    /* component name */
504

    
505
    if(c->mp4) {
506
        /* .mp4: C string */
507
        while(get_byte(pb) && (++len < (atom.size - 24)));
508
    } else {
509
        /* .mov: PASCAL string */
510
#ifdef DEBUG
511
        char* buf;
512
#endif
513
        len = get_byte(pb);
514
#ifdef DEBUG
515
        buf = (uint8_t*) av_malloc(len+1);
516
        if (buf) {
517
            get_buffer(pb, buf, len);
518
            buf[len] = '\0';
519
            av_log(NULL, AV_LOG_DEBUG, "**buf='%s'\n", buf);
520
            av_free(buf);
521
        } else
522
#endif
523
            url_fskip(pb, len);
524
    }
525

    
526
    url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));
527
    return 0;
528
}
529

    
530
static int mov_mp4_read_descr_len(ByteIOContext *pb)
531
{
532
    int len = 0;
533
    int count = 4;
534
    while (count--) {
535
        int c = get_byte(pb);
536
        len = (len << 7) | (c & 0x7f);
537
        if (!(c & 0x80))
538
            break;
539
    }
540
    return len;
541
}
542

    
543
static int mov_mp4_read_descr(ByteIOContext *pb, int *tag)
544
{
545
    int len;
546
    *tag = get_byte(pb);
547
    len = mov_mp4_read_descr_len(pb);
548
#ifdef DEBUG
549
    av_log(NULL, AV_LOG_DEBUG, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
550
#endif
551
    return len;
552
}
553

    
554
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
555
{
556
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
557
    MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
558
    int64_t start_pos = url_ftell(pb);
559
    int tag, len;
560

    
561
    print_atom("esds", atom);
562

    
563
    /* Well, broken but suffisant for some MP4 streams */
564
    get_be32(pb); /* version + flags */
565
    len = mov_mp4_read_descr(pb, &tag);
566
    if (tag == MP4ESDescrTag) {
567
        get_be16(pb); /* ID */
568
        get_byte(pb); /* priority */
569
    } else
570
        get_be16(pb); /* ID */
571

    
572
    len = mov_mp4_read_descr(pb, &tag);
573
    if (tag == MP4DecConfigDescrTag) {
574
        sc->esds.object_type_id = get_byte(pb);
575
        sc->esds.stream_type = get_byte(pb);
576
        sc->esds.buffer_size_db = get_be24(pb);
577
        sc->esds.max_bitrate = get_be32(pb);
578
        sc->esds.avg_bitrate = get_be32(pb);
579

    
580
        len = mov_mp4_read_descr(pb, &tag);
581
        //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);
582
        if (tag == MP4DecSpecificDescrTag) {
583
#ifdef DEBUG
584
            av_log(NULL, AV_LOG_DEBUG, "Specific MPEG4 header len=%d\n", len);
585
#endif
586
            st->codec->extradata = (uint8_t*) av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
587
            if (st->codec->extradata) {
588
                get_buffer(pb, st->codec->extradata, len);
589
                st->codec->extradata_size = len;
590
            }
591
        }
592
    }
593
    /* in any case, skip garbage */
594
    url_fskip(pb, atom.size - ((url_ftell(pb) - start_pos)));
595
    return 0;
596
}
597

    
598
/* this atom contains actual media data */
599
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
600
{
601
    print_atom("mdat", atom);
602

    
603
    if(atom.size == 0) /* wrong one (MP4) */
604
        return 0;
605
    c->found_mdat=1;
606
    c->mdat_offset = atom.offset;
607
    c->mdat_size = atom.size;
608
    if(c->found_moov)
609
        return 1; /* found both, just go */
610
    url_fskip(pb, atom.size);
611
    return 0; /* now go for moov */
612
}
613

    
614
/* this atom should contain all header atoms */
615
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
616
{
617
    int err;
618

    
619
    print_atom("moov", atom);
620

    
621
    err = mov_read_default(c, pb, atom);
622
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
623
    /* so we don't parse the whole file if over a network */
624
    c->found_moov=1;
625
    if(c->found_mdat)
626
        return 1; /* found both, just go */
627
    return 0; /* now go for mdat */
628
}
629

    
630

    
631
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
632
{
633
    print_atom("mdhd", atom);
634

    
635
    get_byte(pb); /* version */
636

    
637
    get_byte(pb); get_byte(pb);
638
    get_byte(pb); /* flags */
639

    
640
    get_be32(pb); /* creation time */
641
    get_be32(pb); /* modification time */
642

    
643
    c->streams[c->fc->nb_streams-1]->time_scale = get_be32(pb);
644
    av_set_pts_info(c->fc->streams[c->fc->nb_streams-1], 64, 1, c->streams[c->fc->nb_streams-1]->time_scale);
645

    
646
#ifdef DEBUG
647
    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 */
648
#endif
649
    c->fc->streams[c->fc->nb_streams-1]->duration= get_be32(pb); /* duration */
650

    
651
    get_be16(pb); /* language */
652
    get_be16(pb); /* quality */
653

    
654
    return 0;
655
}
656

    
657
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
658
{
659
    print_atom("mvhd", atom);
660

    
661
    get_byte(pb); /* version */
662
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
663

    
664
    get_be32(pb); /* creation time */
665
    get_be32(pb); /* modification time */
666
    c->time_scale = get_be32(pb); /* time scale */
667
#ifdef DEBUG
668
    av_log(NULL, AV_LOG_DEBUG, "time scale = %i\n", c->time_scale);
669
#endif
670
    c->duration = get_be32(pb); /* duration */
671
    get_be32(pb); /* preferred scale */
672

    
673
    get_be16(pb); /* preferred volume */
674

    
675
    url_fskip(pb, 10); /* reserved */
676

    
677
    url_fskip(pb, 36); /* display matrix */
678

    
679
    get_be32(pb); /* preview time */
680
    get_be32(pb); /* preview duration */
681
    get_be32(pb); /* poster time */
682
    get_be32(pb); /* selection time */
683
    get_be32(pb); /* selection duration */
684
    get_be32(pb); /* current time */
685
    get_be32(pb); /* next track ID */
686

    
687
    return 0;
688
}
689

    
690
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
691
{
692
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
693

    
694
    if((uint64_t)atom.size > (1<<30))
695
        return -1;
696
    
697
    // currently SVQ3 decoder expect full STSD header - so let's fake it
698
    // this should be fixed and just SMI header should be passed
699
    av_free(st->codec->extradata);
700
    st->codec->extradata_size = 0x5a + atom.size;
701
    st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
702

    
703
    if (st->codec->extradata) {
704
        strcpy(st->codec->extradata, "SVQ3"); // fake
705
        get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
706
        //av_log(NULL, AV_LOG_DEBUG, "Reading SMI %Ld  %s\n", atom.size, (char*)st->codec->extradata + 0x5a);
707
    } else
708
        url_fskip(pb, atom.size);
709

    
710
    return 0;
711
}
712

    
713
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
714
{
715
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
716

    
717
    if((uint64_t)atom.size > (1<<30))
718
        return -1;
719
    
720
    // pass all frma atom to codec, needed at least for QDM2
721
    av_free(st->codec->extradata);
722
    st->codec->extradata_size = atom.size;
723
    st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
724

    
725
    if (st->codec->extradata) {
726
        get_buffer(pb, st->codec->extradata, atom.size);
727
        //av_log(NULL, AV_LOG_DEBUG, "Reading frma %Ld  %s\n", atom.size, (char*)st->codec->extradata);
728
    } else
729
        url_fskip(pb, atom.size);
730

    
731
    return 0;
732
}
733

    
734
static int mov_read_avcC(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
735
{
736
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
737

    
738
    if((uint64_t)atom.size > (1<<30))
739
        return -1;
740

    
741
    av_free(st->codec->extradata);
742

    
743
    st->codec->extradata_size = atom.size;
744
    st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
745

    
746
    if (st->codec->extradata) {
747
        get_buffer(pb, st->codec->extradata, atom.size);
748
    } else
749
        url_fskip(pb, atom.size);
750

    
751
    return 0;
752
}
753

    
754
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
755
{
756
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
757
    MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
758
    unsigned int i, entries;
759

    
760
    print_atom("stco", atom);
761

    
762
    get_byte(pb); /* version */
763
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
764

    
765
    entries = get_be32(pb);
766
        
767
    if(entries >= UINT_MAX/sizeof(int64_t))
768
        return -1;
769
 
770
    sc->chunk_count = entries;
771
    sc->chunk_offsets = (int64_t*) av_malloc(entries * sizeof(int64_t));
772
    if (!sc->chunk_offsets)
773
        return -1;
774
    if (atom.type == MKTAG('s', 't', 'c', 'o')) {
775
        for(i=0; i<entries; i++) {
776
            sc->chunk_offsets[i] = get_be32(pb);
777
        }
778
    } else if (atom.type == MKTAG('c', 'o', '6', '4')) {
779
        for(i=0; i<entries; i++) {
780
            sc->chunk_offsets[i] = get_be64(pb);
781
        }
782
    } else
783
        return -1;
784
    
785
    for(i=0; i<c->fc->nb_streams; i++){
786
        MOVStreamContext *sc2 = (MOVStreamContext *)c->fc->streams[i]->priv_data;
787
        if(sc2 && sc2->chunk_offsets){
788
            int64_t first= sc2->chunk_offsets[0];
789
            int64_t last= sc2->chunk_offsets[sc2->chunk_count-1];
790
            if(first >= sc->chunk_offsets[entries-1] || last <= sc->chunk_offsets[0])
791
                c->ni=1;
792
        }
793
    }
794
#ifdef DEBUG
795
/*
796
    for(i=0; i<entries; i++) {
797
        av_log(NULL, AV_LOG_DEBUG, "chunk offset=0x%Lx\n", sc->chunk_offsets[i]);
798
    }
799
*/
800
#endif
801
    return 0;
802
}
803

    
804
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
805
{
806
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
807
    MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
808
    int entries, frames_per_sample;
809
    uint32_t format;
810
    uint8_t codec_name[32];
811

    
812
    /* for palette traversal */
813
    int color_depth;
814
    int color_start;
815
    int color_count;
816
    int color_end;
817
    int color_index;
818
    int color_dec;
819
    int color_greyscale;
820
    unsigned char *color_table;
821
    int j;
822
    unsigned char r, g, b;
823

    
824
    print_atom("stsd", atom);
825

    
826
    get_byte(pb); /* version */
827
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
828

    
829
    entries = get_be32(pb);
830

    
831
    while(entries--) { //Parsing Sample description table
832
        enum CodecID id;
833
        int size = get_be32(pb); /* size */
834
        format = get_le32(pb); /* data format */
835

    
836
        get_be32(pb); /* reserved */
837
        get_be16(pb); /* reserved */
838
        get_be16(pb); /* index */
839

    
840
        /* for MPEG4: set codec type by looking for it */
841
        id = codec_get_id(mov_video_tags, format);
842
        if (id >= 0) {
843
            AVCodec *codec;
844
            codec = avcodec_find_decoder(id);
845
            if (codec)
846
                st->codec->codec_type = codec->type;
847
        }
848
#ifdef DEBUG
849
        av_log(NULL, AV_LOG_DEBUG, "size=%d 4CC= %c%c%c%c codec_type=%d\n",
850
               size,
851
               (format >> 0) & 0xff,
852
               (format >> 8) & 0xff,
853
               (format >> 16) & 0xff,
854
               (format >> 24) & 0xff,
855
               st->codec->codec_type);
856
#endif
857
        st->codec->codec_tag = format;
858
        if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
859
            MOV_atom_t a = { 0, 0, 0 };
860
            st->codec->codec_id = id;
861
            get_be16(pb); /* version */
862
            get_be16(pb); /* revision level */
863
            get_be32(pb); /* vendor */
864
            get_be32(pb); /* temporal quality */
865
            get_be32(pb); /* spacial quality */
866
            if(st->codec->codec_id == CODEC_ID_MPEG4){ //FIXME this is silly
867
                get_be16(pb);
868
                get_be16(pb);
869
            }else{
870
                st->codec->width = get_be16(pb); /* width */
871
                st->codec->height = get_be16(pb); /* height */
872
            }
873
            get_be32(pb); /* horiz resolution */
874
            get_be32(pb); /* vert resolution */
875
            get_be32(pb); /* data size, always 0 */
876
            frames_per_sample = get_be16(pb); /* frames per samples */
877
#ifdef DEBUG
878
            av_log(NULL, AV_LOG_DEBUG, "frames/samples = %d\n", frames_per_sample);
879
#endif
880
        get_buffer(pb, codec_name, 32); /* codec name, pascal string (FIXME: true for mp4?) */
881
        if (codec_name[0] <= 31) {
882
            memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);
883
            st->codec->codec_name[codec_name[0]] = 0;
884
        }
885

    
886
            st->codec->bits_per_sample = get_be16(pb); /* depth */
887
            st->codec->color_table_id = get_be16(pb); /* colortable id */
888

    
889
/*          These are set in mov_read_stts and might already be set!
890
            st->codec->time_base.den      = 25;
891
            st->codec->time_base.num = 1;
892
*/
893
            size -= (16+8*4+2+32+2*2);
894
#if 0
895
            while (size >= 8) {
896
                MOV_atom_t a;
897
                int64_t start_pos;
898

899
                a.size = get_be32(pb);
900
                a.type = get_le32(pb);
901
                size -= 8;
902
#ifdef DEBUG
903
                av_log(NULL, AV_LOG_DEBUG, "VIDEO: atom_type=%c%c%c%c atom.size=%Ld size_left=%d\n",
904
                       (a.type >> 0) & 0xff,
905
                       (a.type >> 8) & 0xff,
906
                       (a.type >> 16) & 0xff,
907
                       (a.type >> 24) & 0xff,
908
                       a.size, size);
909
#endif
910
                start_pos = url_ftell(pb);
911

    
912
                switch(a.type) {
913
                case MKTAG('e', 's', 'd', 's'):
914
                    {
915
                        int tag, len;
916
                        /* Well, broken but suffisant for some MP4 streams */
917
                        get_be32(pb); /* version + flags */
918
                        len = mov_mp4_read_descr(pb, &tag);
919
                        if (tag == 0x03) {
920
                            /* MP4ESDescrTag */
921
                            get_be16(pb); /* ID */
922
                            get_byte(pb); /* priority */
923
                            len = mov_mp4_read_descr(pb, &tag);
924
                            if (tag != 0x04)
925
                                goto fail;
926
                            /* MP4DecConfigDescrTag */
927
                            get_byte(pb); /* objectTypeId */
928
                            get_be32(pb); /* streamType + buffer size */
929
                            get_be32(pb); /* max bit rate */
930
                            get_be32(pb); /* avg bit rate */
931
                            len = mov_mp4_read_descr(pb, &tag);
932
                            if (tag != 0x05)
933
                                goto fail;
934
                            /* MP4DecSpecificDescrTag */
935
#ifdef DEBUG
936
                            av_log(NULL, AV_LOG_DEBUG, "Specific MPEG4 header len=%d\n", len);
937
#endif
938
                            sc->header_data = av_mallocz(len);
939
                            if (sc->header_data) {
940
                                get_buffer(pb, sc->header_data, len);
941
                                sc->header_len = len;
942
                            }
943
                        }
944
                        /* in any case, skip garbage */
945
                    }
946
                    break;
947
                default:
948
                    break;
949
                }
950
            fail:
951
                av_log(NULL, AV_LOG_DEBUG, "ATOMENEWSIZE %Ld   %d\n", atom.size, url_ftell(pb) - start_pos);
952
                if (atom.size > 8) {
953
                    url_fskip(pb, (atom.size - 8) -
954
                              ((url_ftell(pb) - start_pos)));
955
                    size -= atom.size - 8;
956
                }
957
            }
958
            if (size > 0) {
959
                /* unknown extension */
960
                url_fskip(pb, size);
961
            }
962
#else
963

    
964
            /* figure out the palette situation */
965
            color_depth = st->codec->bits_per_sample & 0x1F;
966
            color_greyscale = st->codec->bits_per_sample & 0x20;
967

    
968
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
969
            if ((color_depth == 2) || (color_depth == 4) || 
970
                (color_depth == 8)) {
971

    
972
                if (color_greyscale) {
973

    
974
                    /* compute the greyscale palette */
975
                    color_count = 1 << color_depth;
976
                    color_index = 255;
977
                    color_dec = 256 / (color_count - 1);
978
                    for (j = 0; j < color_count; j++) {
979
                        r = g = b = color_index;
980
                        c->palette_control.palette[j] =
981
                            (r << 16) | (g << 8) | (b);
982
                        color_index -= color_dec;
983
                        if (color_index < 0)
984
                            color_index = 0;
985
                    }
986

    
987
                } else if (st->codec->color_table_id & 0x08) {
988

    
989
                    /* if flag bit 3 is set, use the default palette */
990
                    color_count = 1 << color_depth;
991
                    if (color_depth == 2)
992
                        color_table = ff_qt_default_palette_4;
993
                    else if (color_depth == 4)
994
                        color_table = ff_qt_default_palette_16;
995
                    else
996
                        color_table = ff_qt_default_palette_256;
997

    
998
                    for (j = 0; j < color_count; j++) {
999
                        r = color_table[j * 4 + 0];
1000
                        g = color_table[j * 4 + 1];
1001
                        b = color_table[j * 4 + 2];
1002
                        c->palette_control.palette[j] =
1003
                            (r << 16) | (g << 8) | (b);
1004
                    }
1005

    
1006
                } else {
1007

    
1008
                    /* load the palette from the file */
1009
                    color_start = get_be32(pb);
1010
                    color_count = get_be16(pb);
1011
                    color_end = get_be16(pb);
1012
                    for (j = color_start; j <= color_end; j++) {
1013
                        /* each R, G, or B component is 16 bits;
1014
                         * only use the top 8 bits; skip alpha bytes
1015
                         * up front */
1016
                        get_byte(pb);
1017
                        get_byte(pb);
1018
                        r = get_byte(pb);
1019
                        get_byte(pb);
1020
                        g = get_byte(pb);
1021
                        get_byte(pb);
1022
                        b = get_byte(pb);
1023
                        get_byte(pb);
1024
                        c->palette_control.palette[j] =
1025
                            (r << 16) | (g << 8) | (b);
1026
                    }
1027
                }
1028

    
1029
                st->codec->palctrl = &c->palette_control;
1030
                st->codec->palctrl->palette_changed = 1;
1031
            } else
1032
                st->codec->palctrl = NULL;
1033

    
1034
            a.size = size;
1035
            mov_read_default(c, pb, a);
1036
#endif
1037
        } else {
1038
            st->codec->codec_id = codec_get_id(mov_audio_tags, format);
1039
            if(st->codec->codec_id==CODEC_ID_AMR_NB || st->codec->codec_id==CODEC_ID_AMR_WB) //from TS26.244
1040
            {
1041
#ifdef DEBUG
1042
               av_log(NULL, AV_LOG_DEBUG, "AMR-NB or AMR-WB audio identified!!\n");
1043
#endif
1044
               get_be32(pb);get_be32(pb); //Reserved_8
1045
               get_be16(pb);//Reserved_2
1046
               get_be16(pb);//Reserved_2
1047
               get_be32(pb);//Reserved_4
1048
               get_be16(pb);//TimeScale
1049
               get_be16(pb);//Reserved_2
1050

    
1051
                //AMRSpecificBox.(10 bytes)
1052
               
1053
               get_be32(pb); //size
1054
               get_be32(pb); //type=='damr'
1055
               get_be32(pb); //vendor
1056
               get_byte(pb); //decoder version
1057
               get_be16(pb); //mode_set
1058
               get_byte(pb); //mode_change_period
1059
               get_byte(pb); //frames_per_sample
1060

    
1061
               st->duration = AV_NOPTS_VALUE;//Not possible to get from this info, must count number of AMR frames
1062
               if(st->codec->codec_id==CODEC_ID_AMR_NB)
1063
               {
1064
                   st->codec->sample_rate=8000;
1065
                   st->codec->channels=1;
1066
               }
1067
               else //AMR-WB
1068
               {
1069
                   st->codec->sample_rate=16000;
1070
                   st->codec->channels=1;
1071
               }
1072
               st->codec->bits_per_sample=16;
1073
               st->codec->bit_rate=0; /*It is not possible to tell this before we have 
1074
                                       an audio frame and even then every frame can be different*/
1075
            }
1076
            else if( st->codec->codec_tag == MKTAG( 'm', 'p', '4', 's' ))
1077
            {
1078
                //This is some stuff for the hint track, lets ignore it!
1079
                //Do some mp4 auto detect.
1080
                c->mp4=1;
1081
                size-=(16);
1082
                url_fskip(pb, size); /* The mp4s atom also contians a esds atom that we can skip*/
1083
            }
1084
            else if( st->codec->codec_tag == MKTAG( 'm', 'p', '4', 'a' ))
1085
            {
1086
                MOV_atom_t a;
1087
                int mp4_version;
1088

    
1089
                /* Handle mp4 audio tag */
1090
                mp4_version=get_be16(pb);/*version*/
1091
                get_be16(pb); /*revesion*/
1092
                get_be32(pb);
1093
                st->codec->channels = get_be16(pb); /* channels */
1094
                st->codec->bits_per_sample = get_be16(pb); /* bits per sample */
1095
                get_be32(pb);
1096
                st->codec->sample_rate = get_be16(pb); /* sample rate, not always correct */
1097
                if(st->codec->sample_rate == 1) //nonsese rate? -> ignore
1098
                    st->codec->sample_rate= 0;
1099

    
1100
                get_be16(pb);
1101
                c->mp4=1;
1102
                
1103
                if(mp4_version==1)
1104
                {
1105
                    url_fskip(pb,16);
1106
                    a.size=size-(16+20+16);
1107
                }
1108
                else
1109
                    a.size=size-(16+20);
1110

    
1111
                a.offset=url_ftell(pb);
1112
                                
1113
                mov_read_default(c, pb, a);
1114

    
1115
                /* Get correct sample rate from extradata */
1116
                if(st->codec->extradata_size) {
1117
                   const int samplerate_table[] = {
1118
                     96000, 88200, 64000, 48000, 44100, 32000, 
1119
                     24000, 22050, 16000, 12000, 11025, 8000,
1120
                     7350, 0, 0, 0
1121
                   };
1122
                   unsigned char *px = st->codec->extradata;
1123
                   // 5 bits objectTypeIndex, 4 bits sampleRateIndex, 4 bits channels
1124
                   int samplerate_index = ((px[0] & 7) << 1) + ((px[1] >> 7) & 1);
1125
                   st->codec->sample_rate = samplerate_table[samplerate_index];
1126
                   st->codec->channels = (px[1] >> 3) & 15;
1127
                }
1128
            }
1129
            else if( st->codec->codec_tag == MKTAG( 'a', 'l', 'a', 'c' ))
1130
            {
1131
                /* Handle alac audio tag + special extradata */
1132
                get_be32(pb); /* version */
1133
                get_be32(pb);
1134
                st->codec->channels = get_be16(pb); /* channels */
1135
                st->codec->bits_per_sample = get_be16(pb); /* bits per sample */
1136
                get_be32(pb);
1137
                st->codec->sample_rate = get_be16(pb);
1138
                get_be16(pb);
1139

    
1140
                /* fetch the 36-byte extradata needed for alac decoding */
1141
                st->codec->extradata_size = 36;
1142
                st->codec->extradata = (uint8_t*) 
1143
                    av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1144
                get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
1145
            }
1146
            else if(size>=(16+20))
1147
            {//16 bytes read, reading atleast 20 more
1148
                uint16_t version;
1149
#ifdef DEBUG
1150
                av_log(NULL, AV_LOG_DEBUG, "audio size=0x%X\n",size);
1151
#endif
1152
                version = get_be16(pb); /* version */
1153
                get_be16(pb); /* revision level */
1154
                get_be32(pb); /* vendor */
1155

    
1156
                st->codec->channels = get_be16(pb);                /* channel count */
1157
                st->codec->bits_per_sample = get_be16(pb);        /* sample size */
1158

    
1159
                /* handle specific s8 codec */
1160
                get_be16(pb); /* compression id = 0*/
1161
                get_be16(pb); /* packet size = 0 */
1162

    
1163
                st->codec->sample_rate = ((get_be32(pb) >> 16));
1164
                //av_log(NULL, AV_LOG_DEBUG, "CODECID %d  %d  %.4s\n", st->codec->codec_id, CODEC_ID_PCM_S16BE, (char*)&format);
1165

    
1166
                switch (st->codec->codec_id) {
1167
                case CODEC_ID_PCM_S16BE:
1168
                    if (st->codec->bits_per_sample == 8)
1169
                        st->codec->codec_id = CODEC_ID_PCM_S8;
1170
                    /* fall */
1171
                case CODEC_ID_PCM_U8:
1172
                    st->codec->bit_rate = st->codec->sample_rate * 8;
1173
                    break;
1174
                default:
1175
                    ;
1176
                }
1177

    
1178
                //Read QT version 1 fields. In version 0 theese dont exist
1179
#ifdef DEBUG
1180
                av_log(NULL, AV_LOG_DEBUG, "version =%d mp4=%d\n",version,c->mp4);
1181
                av_log(NULL, AV_LOG_DEBUG, "size-(16+20+16)=%d\n",size-(16+20+16));
1182
#endif
1183
                if((version==1) && size>=(16+20+16))
1184
                {
1185
                    get_be32(pb); /* samples per packet */
1186
                    get_be32(pb); /* bytes per packet */
1187
                    get_be32(pb); /* bytes per frame */
1188
                    get_be32(pb); /* bytes per sample */
1189
                    if(size>(16+20+16))
1190
                    {
1191
                        //Optional, additional atom-based fields
1192
                        MOV_atom_t a = { format, url_ftell(pb), size - (16 + 20 + 16 + 8) };
1193
#ifdef DEBUG
1194
                        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 ),
1195
                            (format >> 0) & 0xff,
1196
                            (format >> 8) & 0xff,
1197
                            (format >> 16) & 0xff,
1198
                            (format >> 24) & 0xff);
1199
#endif
1200
                        mov_read_default(c, pb, a);
1201
                    }
1202
                }
1203
                else
1204
                {
1205
                    //We should be down to 0 bytes here, but lets make sure.
1206
                    size-=(16+20);
1207
#ifdef DEBUG
1208
                    if(size>0)
1209
                        av_log(NULL, AV_LOG_DEBUG, "skipping 0x%X bytes\n",size-(16+20));
1210
#endif
1211
                    url_fskip(pb, size);
1212
                }
1213
            }
1214
            else
1215
            {
1216
                size-=16;
1217
                //Unknown size, but lets do our best and skip the rest.
1218
#ifdef DEBUG
1219
                av_log(NULL, AV_LOG_DEBUG, "Strange size, skipping 0x%X bytes\n",size);
1220
#endif
1221
                url_fskip(pb, size);
1222
            }
1223
        }
1224
    }
1225
    
1226
    if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1) {
1227
        st->codec->sample_rate= sc->time_scale;
1228
    }
1229

    
1230
    return 0;
1231
}
1232

    
1233
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1234
{
1235
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1236
    MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1237
    unsigned int i, entries;
1238

    
1239
    print_atom("stsc", atom);
1240

    
1241
    get_byte(pb); /* version */
1242
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1243

    
1244
    entries = get_be32(pb);
1245
    
1246
    if(entries >= UINT_MAX / sizeof(MOV_sample_to_chunk_tbl))
1247
        return -1;
1248
    
1249
#ifdef DEBUG
1250
av_log(NULL, AV_LOG_DEBUG, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1251
#endif
1252
    sc->sample_to_chunk_sz = entries;
1253
    sc->sample_to_chunk = (MOV_sample_to_chunk_tbl*) av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));
1254
    if (!sc->sample_to_chunk)
1255
        return -1;
1256
    for(i=0; i<entries; i++) {
1257
        sc->sample_to_chunk[i].first = get_be32(pb);
1258
        sc->sample_to_chunk[i].count = get_be32(pb);
1259
        sc->sample_to_chunk[i].id = get_be32(pb);
1260
#ifdef DEBUG
1261
/*        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); */
1262
#endif
1263
    }
1264
    return 0;
1265
}
1266

    
1267
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1268
{
1269
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1270
    MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1271
    unsigned int i, entries;
1272

    
1273
    print_atom("stss", atom);
1274

    
1275
    get_byte(pb); /* version */
1276
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1277

    
1278
    entries = get_be32(pb);
1279
    
1280
    if(entries >= UINT_MAX / sizeof(long))
1281
        return -1;
1282
    
1283
    sc->keyframe_count = entries;
1284
#ifdef DEBUG
1285
    av_log(NULL, AV_LOG_DEBUG, "keyframe_count = %ld\n", sc->keyframe_count);
1286
#endif
1287
    sc->keyframes = (long*) av_malloc(entries * sizeof(long));
1288
    if (!sc->keyframes)
1289
        return -1;
1290
    for(i=0; i<entries; i++) {
1291
        sc->keyframes[i] = get_be32(pb);
1292
#ifdef DEBUG
1293
/*        av_log(NULL, AV_LOG_DEBUG, "keyframes[]=%ld\n", sc->keyframes[i]); */
1294
#endif
1295
    }
1296
    return 0;
1297
}
1298

    
1299
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1300
{
1301
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1302
    MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1303
    unsigned int i, entries;
1304

    
1305
    print_atom("stsz", atom);
1306

    
1307
    get_byte(pb); /* version */
1308
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1309

    
1310
    sc->sample_size = get_be32(pb);
1311
    entries = get_be32(pb);
1312
    if(entries >= UINT_MAX / sizeof(long))
1313
        return -1;
1314

    
1315
    sc->sample_count = entries;
1316
#ifdef DEBUG
1317
    av_log(NULL, AV_LOG_DEBUG, "sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);
1318
#endif
1319
    if(sc->sample_size)
1320
        return 0; /* there isn't any table following */
1321
    sc->sample_sizes = (long*) av_malloc(entries * sizeof(long));
1322
    if (!sc->sample_sizes)
1323
        return -1;
1324
    for(i=0; i<entries; i++) {
1325
        sc->sample_sizes[i] = get_be32(pb);
1326
#ifdef DEBUG
1327
        av_log(NULL, AV_LOG_DEBUG, "sample_sizes[]=%ld\n", sc->sample_sizes[i]);
1328
#endif
1329
    }
1330
    return 0;
1331
}
1332

    
1333
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1334
{
1335
    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1336
    //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1337
    unsigned int i, entries;
1338
    int64_t duration=0;
1339
    int64_t total_sample_count=0;
1340

    
1341
    print_atom("stts", atom);
1342

    
1343
    get_byte(pb); /* version */
1344
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1345
    entries = get_be32(pb);
1346
    if(entries >= UINT_MAX / sizeof(Time2Sample))
1347
        return -1;
1348

    
1349
    c->streams[c->fc->nb_streams-1]->stts_count = entries;
1350
    c->streams[c->fc->nb_streams-1]->stts_data = av_malloc(entries * sizeof(Time2Sample));
1351

    
1352
#ifdef DEBUG
1353
av_log(NULL, AV_LOG_DEBUG, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1354
#endif
1355
    for(i=0; i<entries; i++) {
1356
        int sample_duration;
1357
        int sample_count;
1358

    
1359
        sample_count=get_be32(pb);
1360
        sample_duration = get_be32(pb);
1361
        c->streams[c->fc->nb_streams - 1]->stts_data[i].count= sample_count;
1362
        c->streams[c->fc->nb_streams - 1]->stts_data[i].duration= sample_duration;
1363

    
1364
#ifdef DEBUG
1365
        av_log(NULL, AV_LOG_DEBUG, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1366
#endif
1367
        duration+=sample_duration*sample_count;
1368
        total_sample_count+=sample_count;
1369
    }
1370

    
1371
    st->nb_frames= total_sample_count;
1372
    if(duration)
1373
        st->duration= duration;
1374
    return 0;
1375
}
1376

    
1377
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1378
{
1379
//    AVStream *st = c->fc->streams[c->fc->nb_streams-1];
1380
    //MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;
1381
    unsigned int i, entries;
1382

    
1383
    print_atom("ctts", atom);
1384

    
1385
    get_byte(pb); /* version */
1386
    get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1387
    entries = get_be32(pb);
1388
    if(entries >= UINT_MAX / sizeof(Time2Sample))
1389
        return -1;
1390

    
1391
    c->streams[c->fc->nb_streams-1]->ctts_count = entries;
1392
    c->streams[c->fc->nb_streams-1]->ctts_data = av_malloc(entries * sizeof(Time2Sample));
1393

    
1394
// #ifdef DEBUG
1395
av_log(NULL, AV_LOG_DEBUG, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1396
// #endif
1397
    for(i=0; i<entries; i++) {
1398
        c->streams[c->fc->nb_streams - 1]->ctts_data[i].count= get_be32(pb);
1399
        c->streams[c->fc->nb_streams - 1]->ctts_data[i].duration= get_be32(pb);
1400
    }
1401
    return 0;
1402
}
1403

    
1404
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1405
{
1406
    AVStream *st;
1407
    MOVStreamContext *sc;
1408

    
1409
    print_atom("trak", atom);
1410

    
1411
    st = av_new_stream(c->fc, c->fc->nb_streams);
1412
    if (!st) return -2;
1413
    sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext));
1414
    if (!sc) {
1415
        av_free(st);
1416
        return -1;
1417
    }
1418

    
1419
    sc->sample_to_chunk_index = -1;
1420
    st->priv_data = sc;
1421
    st->codec->codec_type = CODEC_TYPE_MOV_OTHER;
1422
    st->start_time = 0; /* XXX: check */
1423
    c->streams[c->fc->nb_streams-1] = sc;
1424

    
1425
    return mov_read_default(c, pb, atom);
1426
}
1427

    
1428
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1429
{
1430
    AVStream *st;
1431

    
1432
    print_atom("tkhd", atom);
1433

    
1434
    st = c->fc->streams[c->fc->nb_streams-1];
1435

    
1436
    get_byte(pb); /* version */
1437

    
1438
    get_byte(pb); get_byte(pb);
1439
    get_byte(pb); /* flags */
1440
    /*
1441
    MOV_TRACK_ENABLED 0x0001
1442
    MOV_TRACK_IN_MOVIE 0x0002
1443
    MOV_TRACK_IN_PREVIEW 0x0004
1444
    MOV_TRACK_IN_POSTER 0x0008
1445
    */
1446

    
1447
    get_be32(pb); /* creation time */
1448
    get_be32(pb); /* modification time */
1449
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1450
    get_be32(pb); /* reserved */
1451
    st->start_time = 0; /* check */
1452
    get_be32(pb); /* highlevel (considering edits) duration in movie timebase */
1453
    get_be32(pb); /* reserved */
1454
    get_be32(pb); /* reserved */
1455

    
1456
    get_be16(pb); /* layer */
1457
    get_be16(pb); /* alternate group */
1458
    get_be16(pb); /* volume */
1459
    get_be16(pb); /* reserved */
1460

    
1461
    url_fskip(pb, 36); /* display matrix */
1462

    
1463
    /* those are fixed-point */
1464
    /*st->codec->width =*/ get_be32(pb) >> 16; /* track width */
1465
    /*st->codec->height =*/ get_be32(pb) >> 16; /* track height */
1466

    
1467
    return 0;
1468
}
1469

    
1470
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
1471
/* like the files created with Adobe Premiere 5.0, for samples see */
1472
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
1473
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1474
{
1475
    int err;
1476

    
1477
#ifdef DEBUG
1478
    print_atom("wide", atom);
1479
    debug_indent++;
1480
#endif
1481
    if (atom.size < 8)
1482
        return 0; /* continue */
1483
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
1484
        url_fskip(pb, atom.size - 4);
1485
        return 0;
1486
    }
1487
    atom.type = get_le32(pb);
1488
    atom.offset += 8;
1489
    atom.size -= 8;
1490
    if (atom.type != MKTAG('m', 'd', 'a', 't')) {
1491
        url_fskip(pb, atom.size);
1492
        return 0;
1493
    }
1494
    err = mov_read_mdat(c, pb, atom);
1495
#ifdef DEBUG
1496
    debug_indent--;
1497
#endif
1498
    return err;
1499
}
1500

    
1501

    
1502
#ifdef CONFIG_ZLIB
1503
static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)
1504
{
1505
    return -1;
1506
}
1507

    
1508
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1509
{
1510
    ByteIOContext ctx;
1511
    uint8_t *cmov_data;
1512
    uint8_t *moov_data; /* uncompressed data */
1513
    long cmov_len, moov_len;
1514
    int ret;
1515

    
1516
    print_atom("cmov", atom);
1517

    
1518
    get_be32(pb); /* dcom atom */
1519
    if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))
1520
        return -1;
1521
    if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {
1522
        av_log(NULL, AV_LOG_DEBUG, "unknown compression for cmov atom !");
1523
        return -1;
1524
    }
1525
    get_be32(pb); /* cmvd atom */
1526
    if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))
1527
        return -1;
1528
    moov_len = get_be32(pb); /* uncompressed size */
1529
    cmov_len = atom.size - 6 * 4;
1530

    
1531
    cmov_data = (uint8_t *) av_malloc(cmov_len);
1532
    if (!cmov_data)
1533
        return -1;
1534
    moov_data = (uint8_t *) av_malloc(moov_len);
1535
    if (!moov_data) {
1536
        av_free(cmov_data);
1537
        return -1;
1538
    }
1539
    get_buffer(pb, cmov_data, cmov_len);
1540
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
1541
        return -1;
1542
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)
1543
        return -1;
1544
    ctx.buf_end = ctx.buffer + moov_len;
1545
    atom.type = MKTAG( 'm', 'o', 'o', 'v' );
1546
    atom.offset = 0;
1547
    atom.size = moov_len;
1548
#ifdef DEBUG
1549
    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
1550
#endif
1551
    ret = mov_read_default(c, &ctx, atom);
1552
    av_free(moov_data);
1553
    av_free(cmov_data);
1554

    
1555
    return ret;
1556
}
1557
#endif
1558

    
1559
/* edit list atom */
1560
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)
1561
{
1562
  int i, edit_count;
1563
  print_atom("elst", atom);
1564

    
1565
  get_byte(pb); /* version */
1566
  get_byte(pb); get_byte(pb); get_byte(pb); /* flags */
1567
  edit_count= c->streams[c->fc->nb_streams-1]->edit_count = get_be32(pb);     /* entries */
1568
  
1569
  for(i=0; i<edit_count; i++){
1570
    get_be32(pb); /* Track duration */
1571
    get_be32(pb); /* Media time */
1572
    get_be32(pb); /* Media rate */
1573
  }
1574
#ifdef DEBUG
1575
  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);
1576
#endif
1577
  return 0;
1578
}
1579

    
1580
static const MOVParseTableEntry mov_default_parse_table[] = {
1581
/* mp4 atoms */
1582
{ MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },
1583
{ MKTAG( 'c', 'p', 'r', 't' ), mov_read_default },
1584
{ MKTAG( 'c', 'r', 'h', 'd' ), mov_read_default },
1585
{ MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */
1586
{ MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */
1587
{ MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf },
1588
{ MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf },
1589
{ MKTAG( 'e', 'd', 't', 's' ), mov_read_default },
1590
{ MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },
1591
{ MKTAG( 'f', 'r', 'e', 'e' ), mov_read_leaf },
1592
{ MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },
1593
{ MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf },
1594
{ MKTAG( 'h', 'm', 'h', 'd' ), mov_read_leaf },
1595
{ MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf },
1596
{ MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },
1597
{ MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },
1598
{ MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },
1599
{ MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },
1600
{ MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },
1601
{ MKTAG( 'm', 'p', '4', 'a' ), mov_read_default },
1602
{ MKTAG( 'm', 'p', '4', 's' ), mov_read_default },
1603
{ MKTAG( 'm', 'p', '4', 'v' ), mov_read_default },
1604
{ MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf },
1605
{ MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },
1606
{ MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf },
1607
{ MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default },
1608
{ MKTAG( 's', 'd', 'h', 'd' ), mov_read_default },
1609
{ MKTAG( 's', 'k', 'i', 'p' ), mov_read_leaf },
1610
{ MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */
1611
{ MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */
1612
{ MKTAG( 'a', 'v', 'c', 'C' ), mov_read_avcC }, 
1613
{ MKTAG( 's', 't', 'b', 'l' ), mov_read_default },
1614
{ MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },
1615
{ MKTAG( 's', 't', 'd', 'p' ), mov_read_default },
1616
{ MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },
1617
{ MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */
1618
{ MKTAG( 's', 't', 's', 'h' ), mov_read_default },
1619
{ MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */
1620
{ MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */
1621
{ MKTAG( 's', 't', 't', 's' ), mov_read_stts },
1622
{ MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */
1623
{ MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },
1624
{ MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */
1625
{ MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf },
1626
{ MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf },
1627
{ MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf },
1628
{ MKTAG( 'u', 'u', 'i', 'd' ), mov_read_leaf },
1629
{ MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */
1630
{ MKTAG( 'w', 'a', 'v', 'e' ), mov_read_wave },
1631
/* extra mp4 */
1632
{ MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf },
1633
/* QT atoms */
1634
{ MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf },
1635
{ MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default },
1636
{ MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf },
1637
{ MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },
1638
{ MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },
1639
{ MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf },
1640
{ MKTAG( 'm', 'a', 't', 't' ), mov_read_default },
1641
{ MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf },
1642
{ MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default },
1643
{ MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf },
1644
{ MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default },
1645
{ MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf },
1646
{ MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf },
1647
{ MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf },
1648
{ MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf },
1649
{ MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */
1650
//{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf },
1651
#ifdef CONFIG_ZLIB
1652
{ MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },
1653
#else
1654
{ MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf },
1655
#endif
1656
{ 0L, mov_read_leaf }
1657
};
1658

    
1659
static void mov_free_stream_context(MOVStreamContext *sc)
1660
{
1661
    if(sc) {
1662
        av_freep(&sc->chunk_offsets);
1663
        av_freep(&sc->sample_to_chunk);
1664
        av_freep(&sc->sample_sizes);
1665
        av_freep(&sc->keyframes);
1666
        av_freep(&sc->stts_data);        
1667
        av_freep(&sc->ctts_data);        
1668
        av_freep(&sc);
1669
    }
1670
}
1671

    
1672
static inline uint32_t mov_to_tag(uint8_t *buf)
1673
{
1674
    return MKTAG(buf[0], buf[1], buf[2], buf[3]);
1675
}
1676

    
1677
static inline uint32_t to_be32(uint8_t *buf)
1678
{
1679
    return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
1680
}
1681

    
1682
/* XXX: is it sufficient ? */
1683
static int mov_probe(AVProbeData *p)
1684
{
1685
    unsigned int offset;
1686
    uint32_t tag;
1687
    int score = 0;
1688

    
1689
    /* check file header */
1690
    if (p->buf_size <= 12)
1691
        return 0;
1692
    offset = 0;
1693
    for(;;) {
1694
        /* ignore invalid offset */
1695
        if ((offset + 8) > (unsigned int)p->buf_size)
1696
            return score;
1697
        tag = mov_to_tag(p->buf + offset + 4);
1698
        switch(tag) {
1699
        /* check for obvious tags */
1700
        case MKTAG( 'm', 'o', 'o', 'v' ):
1701
        case MKTAG( 'm', 'd', 'a', 't' ):
1702
        case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */
1703
        case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */
1704
            return AVPROBE_SCORE_MAX;
1705
        /* those are more common words, so rate then a bit less */
1706
        case MKTAG( 'w', 'i', 'd', 'e' ):
1707
        case MKTAG( 'f', 'r', 'e', 'e' ):
1708
        case MKTAG( 'j', 'u', 'n', 'k' ):
1709
        case MKTAG( 'p', 'i', 'c', 't' ):
1710
            return AVPROBE_SCORE_MAX - 5;
1711
        case MKTAG( 'f', 't', 'y', 'p' ):
1712
        case MKTAG( 's', 'k', 'i', 'p' ):
1713
        case MKTAG( 'u', 'u', 'i', 'd' ):
1714
            offset = to_be32(p->buf+offset) + offset;
1715
            /* if we only find those cause probedata is too small at least rate them */
1716
            score = AVPROBE_SCORE_MAX - 50;
1717
            break;
1718
        default:
1719
            /* unrecognized tag */
1720
            return score;
1721
        }
1722
    }
1723
    return score;
1724
}
1725

    
1726
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
1727
{
1728
    MOVContext *mov = (MOVContext *) s->priv_data;
1729
    ByteIOContext *pb = &s->pb;
1730
    int i, j, nb, err;
1731
    MOV_atom_t atom = { 0, 0, 0 };
1732

    
1733
    mov->fc = s;
1734
    mov->parse_table = mov_default_parse_table;
1735
#if 0
1736
    /* XXX: I think we should auto detect */
1737
    if(s->iformat->name[1] == 'p')
1738
        mov->mp4 = 1;
1739
#endif
1740
    if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
1741
        atom.size = url_fsize(pb);
1742
    else
1743
        atom.size = 0x7FFFFFFFFFFFFFFFLL;
1744

    
1745
#ifdef DEBUG
1746
    av_log(NULL, AV_LOG_DEBUG, "filesz=%Ld\n", atom.size);
1747
#endif
1748

    
1749
    /* check MOV header */
1750
    err = mov_read_default(mov, pb, atom);
1751
    if (err<0 || (!mov->found_moov && !mov->found_mdat)) {
1752
        av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%lld\n",
1753
                err, mov->found_moov, mov->found_mdat, url_ftell(pb));
1754
        return -1;
1755
    }
1756
#ifdef DEBUG
1757
    av_log(NULL, AV_LOG_DEBUG, "on_parse_exit_offset=%d\n", (int) url_ftell(pb));
1758
#endif
1759
    /* some cleanup : make sure we are on the mdat atom */
1760
    if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))
1761
        url_fseek(pb, mov->mdat_offset, SEEK_SET);
1762

    
1763
    mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */
1764

    
1765
#ifdef DEBUG
1766
    av_log(NULL, AV_LOG_DEBUG, "mdat_reset_offset=%d\n", (int) url_ftell(pb));
1767
#endif
1768

    
1769
#ifdef DEBUG
1770
    av_log(NULL, AV_LOG_DEBUG, "streams= %d\n", s->nb_streams);
1771
#endif
1772
    mov->total_streams = nb = s->nb_streams;
1773

    
1774
#if 1
1775
    for(i=0; i<s->nb_streams;) {
1776
        if(s->streams[i]->codec->codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */
1777
            av_free(s->streams[i]);
1778
            for(j=i+1; j<s->nb_streams; j++)
1779
                s->streams[j-1] = s->streams[j];
1780
            s->nb_streams--;
1781
        } else
1782
            i++;
1783
    }
1784
    for(i=0; i<s->nb_streams;i++) {
1785
        MOVStreamContext *sc;
1786
        sc = (MOVStreamContext *)s->streams[i]->priv_data;
1787
        sc->ffindex = i;
1788
        sc->is_ff_stream = 1;
1789
    }
1790
#endif
1791
#ifdef DEBUG
1792
    av_log(NULL, AV_LOG_DEBUG, "real streams= %d\n", s->nb_streams);
1793
#endif
1794
    return 0;
1795
}
1796

    
1797
/* Yes, this is ugly... I didn't write the specs of QT :p */
1798
/* XXX:remove useless commented code sometime */
1799
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
1800
{
1801
    MOVContext *mov = (MOVContext *) s->priv_data;
1802
    MOVStreamContext *sc;
1803
    int64_t offset = INT64_MAX;
1804
    int64_t best_dts = INT64_MAX;
1805
    int i, a, b, m;
1806
    int size;
1807
    int idx;
1808
    size = 0x0FFFFFFF;
1809

    
1810
#ifdef MOV_SPLIT_CHUNKS
1811
    if (mov->partial) {
1812
        sc = mov->partial;
1813
        idx = sc->sample_to_chunk_index;
1814

    
1815
        if (idx < 0) return 0;
1816
#ifdef DEBUG
1817
        fprintf(stderr, "sc[ffid %d]->sample_size = %d\n", sc->ffindex, sc->sample_size);
1818
#endif
1819
        //size = sc->sample_sizes[sc->current_sample];
1820
        // that ain't working...
1821
        //size = (sc->sample_size)?sc->sample_size:sc->sample_sizes[sc->current_sample];
1822
        size = (sc->sample_size > 1)?sc->sample_size:sc->sample_sizes[sc->current_sample];
1823

    
1824
        sc->current_sample++;
1825
        sc->left_in_chunk--;
1826

    
1827
        if (sc->left_in_chunk <= 0)
1828
            mov->partial = 0;
1829
        offset = mov->next_chunk_offset;
1830
        /* extract the sample */
1831

    
1832
        goto readchunk;
1833
    }
1834
#endif
1835

    
1836
again:
1837
    sc = 0;
1838
    if(offset == INT64_MAX)
1839
        best_dts= INT64_MAX;
1840
    for(i=0; i<mov->total_streams; i++) {
1841
        MOVStreamContext *msc = mov->streams[i];
1842

    
1843
        if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0){
1844
            if (msc->sample_to_time_index < msc->stts_count && mov->ni) {
1845
                int64_t dts;
1846
                int index= msc->sample_to_time_index;
1847
                int sample= msc->sample_to_time_sample;
1848
                int time= msc->sample_to_time_time;
1849
                int duration = msc->stts_data[index].duration;
1850
                int count = msc->stts_data[index].count;
1851
                if (sample + count < msc->current_sample) {
1852
                    sample += count;
1853
                    time   += count*duration;
1854
                    index ++;
1855
                    duration = msc->stts_data[index].duration;
1856
                }
1857
                dts = time + (msc->current_sample-1 - sample) * (int64_t)duration;
1858
                dts = av_rescale(dts, AV_TIME_BASE, msc->time_scale);
1859
//                av_log(NULL, AV_LOG_DEBUG, "%d %Ld %Ld %Ld \n", i, dts, best_dts, offset);
1860
                if(dts < best_dts){
1861
                    best_dts= dts;
1862
                    sc = msc;
1863
                    offset = msc->chunk_offsets[msc->next_chunk];
1864
                }
1865
            }else{
1866
            //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));
1867
                if ((msc->chunk_offsets[msc->next_chunk] < offset)) {
1868
                    sc = msc;
1869
                    offset = msc->chunk_offsets[msc->next_chunk];
1870
                    //av_log(NULL, AV_LOG_DEBUG, "SELETED  %Ld  i:%d\n", offset, i);
1871
                }
1872
            }
1873
        }
1874
    }
1875
    if (!sc || offset==INT64_MAX)
1876
        return -1;
1877

    
1878
    sc->next_chunk++;
1879

    
1880
    if(mov->next_chunk_offset < offset) { /* some meta data */
1881
        url_fskip(&s->pb, (offset - mov->next_chunk_offset));
1882
        mov->next_chunk_offset = offset;
1883
    }
1884

    
1885
//av_log(NULL, AV_LOG_DEBUG, "chunk: [%i] %lli -> %lli\n", st_id, mov->next_chunk_offset, offset);
1886
    if(!sc->is_ff_stream || (s->streams[sc->ffindex]->discard >= AVDISCARD_ALL)) {
1887
        url_fskip(&s->pb, (offset - mov->next_chunk_offset));
1888
        mov->next_chunk_offset = offset;
1889
        offset = INT64_MAX;
1890
        goto again;
1891
    }
1892

    
1893
    /* now get the chunk size... */
1894

    
1895
    for(i=0; i<mov->total_streams; i++) {
1896
        MOVStreamContext *msc = mov->streams[i];
1897
        if ((msc->next_chunk < msc->chunk_count)
1898
            && msc->chunk_offsets[msc->next_chunk] - offset < size
1899
            && msc->chunk_offsets[msc->next_chunk] > offset)
1900
            size = msc->chunk_offsets[msc->next_chunk] - offset;
1901
    }
1902

    
1903
#ifdef MOV_MINOLTA_FIX
1904
    //Make sure that size is according to sample_size (Needed by .mov files 
1905
    //created on a Minolta Dimage Xi where audio chunks contains waste data in the end)
1906
    //Maybe we should really not only check sc->sample_size, but also sc->sample_sizes
1907
    //but I have no such movies
1908
    if (sc->sample_size > 0) { 
1909
        int foundsize=0;
1910
        for(i=0; i<(sc->sample_to_chunk_sz); i++) {
1911
            if( (sc->sample_to_chunk[i].first)<=(sc->next_chunk) )
1912
            {
1913
                // I can't figure out why for PCM audio sample_size is always 1
1914
                // (it should actually be channels*bits_per_second/8) but it is.
1915
                AVCodecContext* cod = s->streams[sc->ffindex]->codec;
1916
                if (sc->sample_size == 1 && (cod->codec_id == CODEC_ID_PCM_S16BE || cod->codec_id == CODEC_ID_PCM_S16LE))
1917
                    foundsize=(sc->sample_to_chunk[i].count*cod->channels*cod->bits_per_sample)/8;
1918
                else
1919
                    foundsize=sc->sample_to_chunk[i].count*sc->sample_size;
1920
            }
1921
#ifdef DEBUG
1922
            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);
1923
#endif
1924
        }
1925
        if( (foundsize>0) && (foundsize<size) )
1926
        {
1927
#ifdef DEBUG
1928
            /*av_log(NULL, AV_LOG_DEBUG, "this size should actually be %d\n",foundsize);*/
1929
#endif
1930
            size=foundsize;
1931
        }
1932
    }
1933
#endif //MOV_MINOLTA_FIX
1934

    
1935
    idx = sc->sample_to_chunk_index;
1936
    if (idx + 1 < sc->sample_to_chunk_sz && sc->next_chunk >= sc->sample_to_chunk[idx + 1].first)
1937
        idx++;
1938
    sc->sample_to_chunk_index = idx;
1939
#ifdef MOV_SPLIT_CHUNKS
1940
    /* split chunks into samples */
1941
    if (sc->sample_size == 0 || sc->sample_size > 100) {
1942
        if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {
1943
            mov->partial = sc;
1944
            /* we'll have to get those samples before next chunk */
1945
            sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;
1946
            size = (sc->sample_size > 1)?sc->sample_size:sc->sample_sizes[sc->current_sample];
1947
        }
1948

    
1949
        sc->current_sample++;
1950
    }else if(idx + 1 < sc->sample_to_chunk_sz){
1951
        sc->current_sample += sc->sample_size * sc->sample_to_chunk[idx].count;
1952
    }
1953
#endif
1954

    
1955
readchunk:
1956
#ifdef DEBUG
1957
    av_log(NULL, AV_LOG_DEBUG, "chunk: %lli -> %lli (%i)\n", offset, offset + size, size);
1958
#endif
1959
    if(size == 0x0FFFFFFF)
1960
        size = mov->mdat_size + mov->mdat_offset - offset;
1961
    if(size < 0)
1962
        return -1;
1963
    if(size == 0)
1964
        return -1;
1965
    url_fseek(&s->pb, offset, SEEK_SET);
1966

    
1967
    av_get_packet(&s->pb, pkt, size);
1968
    pkt->stream_index = sc->ffindex;
1969
    
1970
    // If the keyframes table exists, mark any samples that are in the table as key frames.
1971
    // If no table exists, treat very sample as a key frame.
1972
    if (sc->keyframes) {        
1973
        a = 0;
1974
        b = sc->keyframe_count - 1;
1975
        
1976
        while (a < b) {
1977
            m = (a + b + 1) >> 1;
1978
            if (sc->keyframes[m] > sc->current_sample) {
1979
                b = m - 1;
1980
            } else {
1981
                a = m;
1982
            }    
1983
        }
1984
        
1985
        if (sc->keyframes[a] == sc->current_sample)
1986
            pkt->flags |= PKT_FLAG_KEY;
1987
    }
1988
    else
1989
        pkt->flags |= PKT_FLAG_KEY;
1990

    
1991
#ifdef DEBUG
1992
/*
1993
    av_log(NULL, AV_LOG_DEBUG, "Packet (%d, %ld) ", pkt->stream_index, pkt->size);
1994
    for(i=0; i<8; i++)
1995
        av_log(NULL, AV_LOG_DEBUG, "%02x ", pkt->data[i]);
1996
    for(i=0; i<8; i++)
1997
        av_log(NULL, AV_LOG_DEBUG, "%c ", (pkt->data[i]) & 0x7F);
1998
    av_log(NULL, AV_LOG_DEBUG, "\n");
1999
*/
2000
#endif
2001

    
2002
    mov->next_chunk_offset = offset + size;
2003
    
2004
    /* find the corresponding dts */         
2005
    if (sc && sc->sample_to_time_index < sc->stts_count && pkt) {         
2006
      unsigned int count;
2007
      uint64_t dts, pts;
2008
      unsigned int duration = sc->stts_data[sc->sample_to_time_index].duration;
2009
      count = sc->stts_data[sc->sample_to_time_index].count;
2010
      if ((sc->sample_to_time_sample + count) < sc->current_sample) {         
2011
        sc->sample_to_time_sample += count;         
2012
        sc->sample_to_time_time   += count*duration;         
2013
        sc->sample_to_time_index ++;         
2014
        duration = sc->stts_data[sc->sample_to_time_index].duration;
2015
      }         
2016
      dts = sc->sample_to_time_time + (sc->current_sample-1 - sc->sample_to_time_sample) * (int64_t)duration;
2017
        /* find the corresponding pts */
2018
        if (sc->sample_to_ctime_index < sc->ctts_count) {
2019
            int duration = sc->ctts_data[sc->sample_to_ctime_index].duration;
2020
            int count = sc->ctts_data[sc->sample_to_ctime_index].count;
2021

    
2022
            if ((sc->sample_to_ctime_sample + count) < sc->current_sample) {
2023
                sc->sample_to_ctime_sample += count;
2024
                sc->sample_to_ctime_index ++;
2025
                duration = sc->ctts_data[sc->sample_to_ctime_index].duration;
2026
            }
2027
            pts = dts + duration;
2028
        }else
2029
            pts = dts;
2030
        pkt->pts = pts;
2031
        pkt->dts = dts;
2032
#ifdef DEBUG
2033
    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"
2034
      , pkt->stream_index, sc->current_sample-1, pkt->dts, pkt->pts
2035
      , sc->sample_to_time_sample
2036
      , sc->sample_to_time_time
2037
      , sc->sample_to_time_index
2038
      , sc->stts_count
2039
      , count
2040
      , duration);
2041
#endif
2042
    }
2043

    
2044
    return 0;
2045
}
2046

    
2047
#if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)
2048
/**
2049
 * Seek method based on the one described in the Appendix C of QTFileFormat.pdf
2050
 */
2051
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2052
{
2053
    MOVContext* mov = (MOVContext *) s->priv_data;
2054
    MOVStreamContext* sc;
2055
    int32_t i, a, b, m;
2056
    int64_t start_time;
2057
    int32_t seek_sample, sample;
2058
    int32_t duration;
2059
    int32_t count;
2060
    int32_t chunk;
2061
    int32_t left_in_chunk;
2062
    int64_t chunk_file_offset;
2063
    int64_t sample_file_offset;
2064
    int32_t first_chunk_sample;
2065
    int32_t sample_to_chunk_idx;
2066
    int sample_to_time_index;         
2067
    long sample_to_time_sample = 0;         
2068
    uint64_t sample_to_time_time = 0;      
2069
    int mov_idx;
2070

    
2071
    // Find the corresponding mov stream
2072
    for (mov_idx = 0; mov_idx < mov->total_streams; mov_idx++)
2073
        if (mov->streams[mov_idx]->ffindex == stream_index)
2074
            break;
2075
    if (mov_idx == mov->total_streams) {
2076
        av_log(s, AV_LOG_ERROR, "mov: requested stream was not found in mov streams (idx=%i)\n", stream_index);
2077
        return -1;
2078
    }
2079
    sc = mov->streams[mov_idx];
2080

    
2081
    // Step 1. Find the edit that contains the requested time (elst)
2082
    if (sc->edit_count) {
2083
        // FIXME should handle edit list
2084
        av_log(s, AV_LOG_ERROR, "mov: does not handle seeking in files that contain edit list (c:%d)\n", sc->edit_count);
2085
        return -1;
2086
    }
2087

    
2088
    // Step 2. Find the corresponding sample using the Time-to-sample atom (stts) */
2089
#ifdef DEBUG
2090
  av_log(s, AV_LOG_DEBUG, "Searching for time %li in stream #%i (time_scale=%i)\n", (long)timestamp, mov_idx, sc->time_scale);
2091
#endif
2092
    start_time = 0; // FIXME use elst atom
2093
    sample = 1; // sample are 0 based in table
2094
#ifdef DEBUG
2095
    av_log(s, AV_LOG_DEBUG, "Searching for sample_time %li \n", (long)sample_time);
2096
#endif
2097
    for (i = 0; i < sc->stts_count; i++) {
2098
        count = sc->stts_data[i].count;
2099
        duration = sc->stts_data[i].duration;
2100
//av_log(s, AV_LOG_DEBUG, "> sample_time %lli \n", (long)sample_time);                
2101
//av_log(s, AV_LOG_DEBUG, "> count=%i duration=%i\n", count, duration);        
2102
        if ((start_time + count*duration) > sample_time) {
2103
            sample_to_time_time = start_time;         
2104
            sample_to_time_index = i;         
2105
            sample_to_time_sample = sample;         
2106
            sample += (sample_time - start_time) / duration;
2107
            break;
2108
        }
2109
        sample += count;
2110
        start_time += count * duration;
2111
    }   
2112
    sample_to_time_time = start_time;         
2113
    sample_to_time_index = i;       
2114
    /* NOTE: despite what qt doc say, the dt value (Display Time in qt vocabulary) computed with the stts atom
2115
       is a decoding time stamp (dts) not a presentation time stamp. And as usual dts != pts for stream with b frames */
2116

    
2117
#ifdef DEBUG
2118
    av_log(s, AV_LOG_DEBUG, "Found time %li at sample #%u\n", (long)sample_time, sample);
2119
#endif
2120
    if (sample > sc->sample_count) {
2121
        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);
2122
        return -1;
2123
    }
2124

    
2125
    // Step 3. Find the prior sync. sample using the Sync sample atom (stss)
2126
    if (sc->keyframes) {
2127
        a = 0;
2128
        b = sc->keyframe_count - 1;
2129
        while (a < b) {
2130
            m = (a + b + 1) >> 1;
2131
            if (sc->keyframes[m] > sample) {
2132
                b = m - 1;
2133
            } else {
2134
                a = m;
2135
            }
2136
#ifdef DEBUG
2137
         // 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);
2138
#endif
2139
        }
2140
        // for low latency prob: always use the previous keyframe, just uncomment the next line
2141
        // if (a) a--;
2142
        seek_sample = sc->keyframes[a];
2143
    }
2144
    else
2145
        seek_sample = sample; // else all samples are key frames
2146
#ifdef DEBUG
2147
    av_log(s, AV_LOG_DEBUG, "Found nearest keyframe at sample #%i \n", seek_sample);
2148
#endif
2149

    
2150
    // Step 4. Find the chunk of the sample using the Sample-to-chunk-atom (stsc)
2151
    for (first_chunk_sample = 1, i = 0; i < (sc->sample_to_chunk_sz - 1); i++) {
2152
        b = (sc->sample_to_chunk[i + 1].first - sc->sample_to_chunk[i].first) * sc->sample_to_chunk[i].count;
2153
        if (seek_sample >= first_chunk_sample && seek_sample < (first_chunk_sample + b))
2154
            break;
2155
        first_chunk_sample += b;
2156
    }
2157
    chunk = sc->sample_to_chunk[i].first + (seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count;
2158
    left_in_chunk = sc->sample_to_chunk[i].count - (seek_sample - first_chunk_sample) % sc->sample_to_chunk[i].count;
2159
    first_chunk_sample += ((seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count) * sc->sample_to_chunk[i].count;
2160
    sample_to_chunk_idx = i;
2161
#ifdef DEBUG
2162
    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);
2163
#endif
2164

    
2165
    // Step 5. Find the offset of the chunk using the chunk offset atom
2166
    if (!sc->chunk_offsets) {
2167
        av_log(s, AV_LOG_ERROR, "mov: no chunk offset atom, unable to seek\n");
2168
        return -1;
2169
    }
2170
    if (chunk > sc->chunk_count) {
2171
        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);
2172
        return -1;
2173
    }
2174
    chunk_file_offset = sc->chunk_offsets[chunk - 1];
2175
#ifdef DEBUG
2176
    av_log(s, AV_LOG_DEBUG, "Chunk file offset is #%llu \n", chunk_file_offset);
2177
#endif
2178

    
2179
    // Step 6. Find the byte offset within the chunk using the sample size atom
2180
    sample_file_offset = chunk_file_offset;
2181
    if (sc->sample_size)
2182
        sample_file_offset += (seek_sample - first_chunk_sample) * sc->sample_size;
2183
    else {
2184
        for (i = 0; i < (seek_sample - first_chunk_sample); i++) {
2185
        sample_file_offset += sc->sample_sizes[first_chunk_sample + i - 1];
2186
        }
2187
    }
2188
#ifdef DEBUG
2189
    av_log(s, AV_LOG_DEBUG, "Sample file offset is #%llu \n", sample_file_offset);
2190
#endif
2191

    
2192
    // Step 6. Update the parser
2193
    mov->partial = sc;
2194
    mov->next_chunk_offset = sample_file_offset;
2195
    // Update current stream state
2196
    sc->current_sample = seek_sample - 1;  // zero based
2197
    sc->left_in_chunk = left_in_chunk;
2198
    sc->next_chunk = chunk; // +1 -1 (zero based)
2199
    sc->sample_to_chunk_index = sample_to_chunk_idx;
2200

    
2201
    // Update other streams    
2202
    for (i = 0; i<mov->total_streams; i++) {
2203
        MOVStreamContext *msc;
2204
        if (i == mov_idx) continue;
2205
        // Find the nearest 'next' chunk
2206
        msc = mov->streams[i];
2207
        a = 0;
2208
        b = msc->chunk_count - 1;
2209
        while (a < b) {
2210
            m = (a + b + 1) >> 1;
2211
            if (msc->chunk_offsets[m] > chunk_file_offset) {
2212
                b = m - 1;
2213
            } else {
2214
                a = m;
2215
            }
2216
#ifdef DEBUG            
2217
/*            av_log(s, AV_LOG_DEBUG, "a=%i (%li) b=%i (%li) m=%i (%li) stream #%i\n"
2218
            , a, (long)msc->chunk_offsets[a], b, (long)msc->chunk_offsets[b], m, (long)msc->chunk_offsets[m],  i); */
2219
#endif                  
2220
        }
2221
        msc->next_chunk = a;
2222
        if (msc->chunk_offsets[a] < chunk_file_offset && a < (msc->chunk_count-1))
2223
            msc->next_chunk ++;
2224
#ifdef DEBUG        
2225
        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]);
2226
#endif        
2227
        // Compute sample count and index in the sample_to_chunk table (what a pity)
2228
        msc->sample_to_chunk_index = 0;
2229
        msc->current_sample = 0;
2230
        for(;  msc->sample_to_chunk_index < (msc->sample_to_chunk_sz - 1)
2231
            && msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first <= (1 + msc->next_chunk); msc->sample_to_chunk_index++) {
2232
            msc->current_sample += (msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first - msc->sample_to_chunk[msc->sample_to_chunk_index].first) \
2233
            * msc->sample_to_chunk[msc->sample_to_chunk_index].count;
2234
        }
2235
        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;
2236
        msc->left_in_chunk = msc->sample_to_chunk[msc->sample_to_chunk_index].count - 1;
2237
        // Find corresponding position in stts (used later to compute dts)         
2238
        sample = 0;         
2239
        start_time = 0;         
2240
        for (msc->sample_to_time_index = 0; msc->sample_to_time_index < msc->stts_count; msc->sample_to_time_index++) {         
2241
            count = msc->stts_data[msc->sample_to_time_index].count;
2242
            duration = msc->stts_data[msc->sample_to_time_index].duration;
2243
            if ((sample + count - 1) > msc->current_sample) {         
2244
                msc->sample_to_time_time = start_time;         
2245
                msc->sample_to_time_sample = sample;         
2246
                break;         
2247
            }         
2248
            sample += count;         
2249
            start_time += count * duration;         
2250
        }
2251
        sample = 0;
2252
        for (msc->sample_to_ctime_index = 0; msc->sample_to_ctime_index < msc->ctts_count; msc->sample_to_ctime_index++) {
2253
            count = msc->ctts_data[msc->sample_to_ctime_index].count;
2254
            duration = msc->ctts_data[msc->sample_to_ctime_index].duration;
2255
            if ((sample + count - 1) > msc->current_sample) {
2256
                msc->sample_to_ctime_sample = sample;
2257
                break;
2258
            }
2259
            sample += count;
2260
        }       
2261
#ifdef DEBUG        
2262
        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);
2263
#endif        
2264
    }                
2265
    return 0;
2266
}
2267
#endif
2268

    
2269
static int mov_read_close(AVFormatContext *s)
2270
{
2271
    int i;
2272
    MOVContext *mov = (MOVContext *) s->priv_data;
2273
    for(i=0; i<mov->total_streams; i++)
2274
        mov_free_stream_context(mov->streams[i]);
2275
    /* free color tabs */
2276
    for(i=0; i<mov->ctab_size; i++)
2277
        av_freep(&mov->ctab[i]);
2278
    av_freep(&mov->ctab);
2279
    return 0;
2280
}
2281

    
2282
static AVInputFormat mov_iformat = {
2283
    "mov,mp4,m4a,3gp,3g2",
2284
    "QuickTime/MPEG4 format",
2285
    sizeof(MOVContext),
2286
    mov_probe,
2287
    mov_read_header,
2288
    mov_read_packet,
2289
    mov_read_close,
2290
#if defined(MOV_SPLIT_CHUNKS) && defined(MOV_SEEK)
2291
    mov_read_seek,
2292
#endif    
2293
};
2294

    
2295
int mov_init(void)
2296
{
2297
    av_register_input_format(&mov_iformat);
2298
    return 0;
2299
}