ffmpeg / libavformat / mov.c @ 8e2fd8e1
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/*
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* MOV demuxer
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* Copyright (c) 2001 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <limits.h> |
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//#define DEBUG
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#include "libavutil/intreadwrite.h" |
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#include "avformat.h" |
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#include "riff.h" |
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#include "isom.h" |
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#include "dv.h" |
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#include "libavcodec/mpeg4audio.h" |
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#include "libavcodec/mpegaudiodata.h" |
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#if 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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* Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
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* - the code is quite ugly... maybe I won't do it recursive next time :-)
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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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#include "qtpalette.h" |
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#undef NDEBUG
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#include <assert.h> |
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/* the QuickTime file format is quite convoluted...
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* it has lots of index tables, each indexing something in another one...
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* Here we just use what is needed to read the chunks
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*/
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typedef struct { |
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int first;
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int count;
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int id;
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} MOVStsc; |
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typedef struct { |
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uint32_t type; |
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char *path;
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} MOVDref; |
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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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} MOVAtom; |
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struct MOVParseTableEntry;
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typedef struct { |
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unsigned track_id;
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uint64_t base_data_offset; |
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uint64_t moof_offset; |
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unsigned stsd_id;
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unsigned duration;
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unsigned size;
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unsigned flags;
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} MOVFragment; |
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typedef struct { |
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unsigned track_id;
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unsigned stsd_id;
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unsigned duration;
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unsigned size;
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unsigned flags;
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} MOVTrackExt; |
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typedef struct MOVStreamContext { |
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ByteIOContext *pb; |
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int ffindex; /* the ffmpeg stream id */ |
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int next_chunk;
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unsigned int chunk_count; |
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int64_t *chunk_offsets; |
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unsigned int stts_count; |
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MOVStts *stts_data; |
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unsigned int ctts_count; |
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MOVStts *ctts_data; |
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unsigned int edit_count; /* number of 'edit' (elst atom) */ |
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unsigned int sample_to_chunk_sz; |
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MOVStsc *sample_to_chunk; |
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int sample_to_ctime_index;
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int sample_to_ctime_sample;
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unsigned int sample_size; |
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unsigned int sample_count; |
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int *sample_sizes;
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unsigned int keyframe_count; |
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int *keyframes;
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int time_scale;
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int time_rate;
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int time_offset; /// time offset of the first edit list entry |
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int current_sample;
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unsigned int bytes_per_frame; |
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unsigned int samples_per_frame; |
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int dv_audio_container;
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int pseudo_stream_id; ///< -1 means demux all ids |
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int16_t audio_cid; ///< stsd audio compression id
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unsigned drefs_count;
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MOVDref *drefs; |
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int dref_id;
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int wrong_dts; ///< dts are wrong due to negative ctts |
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int width; ///< tkhd width |
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int height; ///< tkhd height |
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} MOVStreamContext; |
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typedef struct MOVContext { |
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AVFormatContext *fc; |
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int time_scale;
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int64_t 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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AVPaletteControl palette_control; |
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DVDemuxContext *dv_demux; |
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AVFormatContext *dv_fctx; |
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int isom; /* 1 if file is ISO Media (mp4/3gp) */ |
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MOVFragment fragment; ///< current fragment in moof atom
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MOVTrackExt *trex_data; |
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unsigned trex_count;
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int itunes_metadata; ///< metadata are itunes style |
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} MOVContext; |
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/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
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/* those functions parse an atom */
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/* return code:
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0: continue to parse next atom
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<0: error occurred, exit
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*/
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/* links atom IDs to parse functions */
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typedef struct MOVParseTableEntry { |
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uint32_t type; |
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int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOVAtom atom);
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} MOVParseTableEntry; |
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static const MOVParseTableEntry mov_default_parse_table[]; |
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static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
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{
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int64_t total_size = 0;
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MOVAtom a; |
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int i;
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int err = 0; |
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a.offset = atom.offset; |
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if (atom.size < 0) |
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atom.size = INT64_MAX; |
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while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) { |
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a.size = atom.size; |
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a.type=0;
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if(atom.size >= 8) { |
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a.size = get_be32(pb); |
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a.type = get_le32(pb); |
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} |
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total_size += 8;
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a.offset += 8;
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dprintf(c->fc, "type: %08x %.4s sz: %"PRIx64" %"PRIx64" %"PRIx64"\n", |
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a.type, (char*)&a.type, a.size, atom.size, total_size);
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if (a.size == 1) { /* 64 bit extended size */ |
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a.size = get_be64(pb) - 8;
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a.offset += 8;
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total_size += 8;
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} |
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if (a.size == 0) { |
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a.size = atom.size - total_size; |
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if (a.size <= 8) |
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break;
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} |
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a.size -= 8;
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if(a.size < 0) |
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break;
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a.size = FFMIN(a.size, atom.size - total_size); |
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for (i = 0; mov_default_parse_table[i].type != 0 |
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&& mov_default_parse_table[i].type != a.type; i++) |
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/* empty */;
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if (mov_default_parse_table[i].type == 0) { /* skip leaf atoms data */ |
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url_fskip(pb, a.size); |
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} else {
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int64_t start_pos = url_ftell(pb); |
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int64_t left; |
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err = mov_default_parse_table[i].parse(c, pb, a); |
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if (url_is_streamed(pb) && c->found_moov && c->found_mdat)
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break;
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left = a.size - url_ftell(pb) + start_pos; |
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if (left > 0) /* skip garbage at atom end */ |
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url_fskip(pb, left); |
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} |
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a.offset += a.size; |
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total_size += a.size; |
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} |
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if (!err && total_size < atom.size && atom.size < 0x7ffff) |
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url_fskip(pb, atom.size - total_size); |
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return err;
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} |
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static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
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{
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AVStream *st = c->fc->streams[c->fc->nb_streams-1];
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MOVStreamContext *sc = st->priv_data; |
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int entries, i, j;
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get_be32(pb); // version + flags
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entries = get_be32(pb); |
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if (entries >= UINT_MAX / sizeof(*sc->drefs)) |
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return -1; |
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sc->drefs_count = entries; |
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sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
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for (i = 0; i < sc->drefs_count; i++) { |
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MOVDref *dref = &sc->drefs[i]; |
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uint32_t size = get_be32(pb); |
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int64_t next = url_ftell(pb) + size - 4;
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dref->type = get_le32(pb); |
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get_be32(pb); // version + flags
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dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size); |
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if (dref->type == MKTAG('a','l','i','s') && size > 150) { |
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/* macintosh alias record */
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uint16_t volume_len, len; |
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char volume[28]; |
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int16_t type; |
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url_fskip(pb, 10);
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volume_len = get_byte(pb); |
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volume_len = FFMIN(volume_len, 27);
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get_buffer(pb, volume, 27);
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volume[volume_len] = 0;
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av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", volume, volume_len);
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url_fskip(pb, 112);
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for (type = 0; type != -1 && url_ftell(pb) < next; ) { |
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type = get_be16(pb); |
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len = get_be16(pb); |
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av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
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if (len&1) |
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len += 1;
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if (type == 2) { // absolute path |
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av_free(dref->path); |
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dref->path = av_mallocz(len+1);
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if (!dref->path)
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return AVERROR(ENOMEM);
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get_buffer(pb, dref->path, len); |
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if (len > volume_len && !strncmp(dref->path, volume, volume_len)) {
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len -= volume_len; |
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memmove(dref->path, dref->path+volume_len, len); |
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dref->path[len] = 0;
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} |
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for (j = 0; j < len; j++) |
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if (dref->path[j] == ':') |
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dref->path[j] = '/';
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av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
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} else
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url_fskip(pb, len); |
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} |
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} |
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url_fseek(pb, next, SEEK_SET); |
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} |
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return 0; |
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} |
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static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
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{
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AVStream *st = c->fc->streams[c->fc->nb_streams-1];
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uint32_t type; |
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uint32_t ctype; |
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get_byte(pb); /* version */
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get_be24(pb); /* flags */
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/* component type */
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ctype = get_le32(pb); |
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type = get_le32(pb); /* component subtype */
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dprintf(c->fc, "ctype= %c%c%c%c (0x%08x)\n", *((char *)&ctype), ((char *)&ctype)[1], |
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((char *)&ctype)[2], ((char *)&ctype)[3], (int) ctype); |
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dprintf(c->fc, "stype= %c%c%c%c\n",
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*((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]); |
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if(!ctype)
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c->isom = 1;
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if (type == MKTAG('v','i','d','e')) |
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st->codec->codec_type = CODEC_TYPE_VIDEO; |
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else if(type == MKTAG('s','o','u','n')) |
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st->codec->codec_type = CODEC_TYPE_AUDIO; |
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else if(type == MKTAG('m','1','a',' ')) |
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st->codec->codec_id = CODEC_ID_MP2; |
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else if(type == MKTAG('s','u','b','p')) { |
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st->codec->codec_type = CODEC_TYPE_SUBTITLE; |
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} |
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get_be32(pb); /* component manufacture */
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get_be32(pb); /* component flags */
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get_be32(pb); /* component flags mask */
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if(atom.size <= 24) |
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return 0; /* nothing left to read */ |
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url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset)); |
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return 0; |
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} |
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static int mp4_read_descr_len(ByteIOContext *pb) |
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{
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int len = 0; |
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int count = 4; |
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while (count--) {
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int c = get_byte(pb);
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len = (len << 7) | (c & 0x7f); |
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if (!(c & 0x80)) |
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break;
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} |
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return len;
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} |
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static int mp4_read_descr(MOVContext *c, ByteIOContext *pb, int *tag) |
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{
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int len;
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*tag = get_byte(pb); |
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len = mp4_read_descr_len(pb); |
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dprintf(c->fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
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return len;
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} |
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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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static const AVCodecTag mp4_audio_types[] = { |
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{ CODEC_ID_MP3ON4, 29 }, /* old mp3on4 draft */
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{ CODEC_ID_MP3ON4, 32 }, /* layer 1 */
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{ CODEC_ID_MP3ON4, 33 }, /* layer 2 */
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{ CODEC_ID_MP3ON4, 34 }, /* layer 3 */
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{ CODEC_ID_NONE, 0 },
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}; |
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static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
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{
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AVStream *st = c->fc->streams[c->fc->nb_streams-1];
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int tag, len;
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get_be32(pb); /* version + flags */
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len = mp4_read_descr(c, pb, &tag); |
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if (tag == MP4ESDescrTag) {
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get_be16(pb); /* ID */
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get_byte(pb); /* priority */
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} else
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get_be16(pb); /* ID */
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len = mp4_read_descr(c, pb, &tag); |
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if (tag == MP4DecConfigDescrTag) {
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int object_type_id = get_byte(pb);
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get_byte(pb); /* stream type */
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get_be24(pb); /* buffer size db */
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get_be32(pb); /* max bitrate */
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get_be32(pb); /* avg bitrate */
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st->codec->codec_id= codec_get_id(ff_mp4_obj_type, object_type_id); |
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dprintf(c->fc, "esds object type id %d\n", object_type_id);
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len = mp4_read_descr(c, pb, &tag); |
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if (tag == MP4DecSpecificDescrTag) {
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dprintf(c->fc, "Specific MPEG4 header len=%d\n", len);
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if((uint64_t)len > (1<<30)) |
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return -1; |
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st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE); |
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if (!st->codec->extradata)
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return AVERROR(ENOMEM);
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get_buffer(pb, st->codec->extradata, len); |
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st->codec->extradata_size = len; |
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if (st->codec->codec_id == CODEC_ID_AAC) {
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MPEG4AudioConfig cfg; |
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ff_mpeg4audio_get_config(&cfg, st->codec->extradata, |
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st->codec->extradata_size); |
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if (cfg.chan_config > 7) |
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return -1; |
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st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config]; |
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if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4 |
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st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index]; |
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else
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st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
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dprintf(c->fc, "mp4a config channels %d obj %d ext obj %d "
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"sample rate %d ext sample rate %d\n", st->codec->channels,
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cfg.object_type, cfg.ext_object_type, |
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cfg.sample_rate, cfg.ext_sample_rate); |
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if (!(st->codec->codec_id = codec_get_id(mp4_audio_types,
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cfg.object_type))) |
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st->codec->codec_id = CODEC_ID_AAC; |
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} |
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} |
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} |
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return 0; |
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} |
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|
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static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
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{
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const int num = get_be32(pb); |
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const int den = get_be32(pb); |
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AVStream * const st = c->fc->streams[c->fc->nb_streams-1]; |
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if (den != 0) { |
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if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default |
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(den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) |
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av_log(c->fc, AV_LOG_WARNING, |
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"sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",
|
| 447 |
st->sample_aspect_ratio.num, st->sample_aspect_ratio.den); |
| 448 |
st->sample_aspect_ratio.num = num; |
| 449 |
st->sample_aspect_ratio.den = den; |
| 450 |
} |
| 451 |
return 0; |
| 452 |
} |
| 453 |
|
| 454 |
/* this atom contains actual media data */
|
| 455 |
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 456 |
{
|
| 457 |
if(atom.size == 0) /* wrong one (MP4) */ |
| 458 |
return 0; |
| 459 |
c->found_mdat=1;
|
| 460 |
return 0; /* now go for moov */ |
| 461 |
} |
| 462 |
|
| 463 |
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 464 |
{
|
| 465 |
uint32_t type = get_le32(pb); |
| 466 |
|
| 467 |
if (type != MKTAG('q','t',' ',' ')) |
| 468 |
c->isom = 1;
|
| 469 |
av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type); |
| 470 |
get_be32(pb); /* minor version */
|
| 471 |
url_fskip(pb, atom.size - 8);
|
| 472 |
return 0; |
| 473 |
} |
| 474 |
|
| 475 |
/* this atom should contain all header atoms */
|
| 476 |
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 477 |
{
|
| 478 |
if (mov_read_default(c, pb, atom) < 0) |
| 479 |
return -1; |
| 480 |
/* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
|
| 481 |
/* so we don't parse the whole file if over a network */
|
| 482 |
c->found_moov=1;
|
| 483 |
return 0; /* now go for mdat */ |
| 484 |
} |
| 485 |
|
| 486 |
static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 487 |
{
|
| 488 |
c->fragment.moof_offset = url_ftell(pb) - 8;
|
| 489 |
dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
|
| 490 |
return mov_read_default(c, pb, atom);
|
| 491 |
} |
| 492 |
|
| 493 |
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 494 |
{
|
| 495 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 496 |
MOVStreamContext *sc = st->priv_data; |
| 497 |
int version = get_byte(pb);
|
| 498 |
unsigned lang;
|
| 499 |
|
| 500 |
if (version > 1) |
| 501 |
return -1; /* unsupported */ |
| 502 |
|
| 503 |
get_be24(pb); /* flags */
|
| 504 |
if (version == 1) { |
| 505 |
get_be64(pb); |
| 506 |
get_be64(pb); |
| 507 |
} else {
|
| 508 |
get_be32(pb); /* creation time */
|
| 509 |
get_be32(pb); /* modification time */
|
| 510 |
} |
| 511 |
|
| 512 |
sc->time_scale = get_be32(pb); |
| 513 |
st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */ |
| 514 |
|
| 515 |
lang = get_be16(pb); /* language */
|
| 516 |
ff_mov_lang_to_iso639(lang, st->language); |
| 517 |
get_be16(pb); /* quality */
|
| 518 |
|
| 519 |
return 0; |
| 520 |
} |
| 521 |
|
| 522 |
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 523 |
{
|
| 524 |
int version = get_byte(pb); /* version */ |
| 525 |
get_be24(pb); /* flags */
|
| 526 |
|
| 527 |
if (version == 1) { |
| 528 |
get_be64(pb); |
| 529 |
get_be64(pb); |
| 530 |
} else {
|
| 531 |
get_be32(pb); /* creation time */
|
| 532 |
get_be32(pb); /* modification time */
|
| 533 |
} |
| 534 |
c->time_scale = get_be32(pb); /* time scale */
|
| 535 |
|
| 536 |
dprintf(c->fc, "time scale = %i\n", c->time_scale);
|
| 537 |
|
| 538 |
c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */ |
| 539 |
get_be32(pb); /* preferred scale */
|
| 540 |
|
| 541 |
get_be16(pb); /* preferred volume */
|
| 542 |
|
| 543 |
url_fskip(pb, 10); /* reserved */ |
| 544 |
|
| 545 |
url_fskip(pb, 36); /* display matrix */ |
| 546 |
|
| 547 |
get_be32(pb); /* preview time */
|
| 548 |
get_be32(pb); /* preview duration */
|
| 549 |
get_be32(pb); /* poster time */
|
| 550 |
get_be32(pb); /* selection time */
|
| 551 |
get_be32(pb); /* selection duration */
|
| 552 |
get_be32(pb); /* current time */
|
| 553 |
get_be32(pb); /* next track ID */
|
| 554 |
|
| 555 |
return 0; |
| 556 |
} |
| 557 |
|
| 558 |
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 559 |
{
|
| 560 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 561 |
|
| 562 |
if((uint64_t)atom.size > (1<<30)) |
| 563 |
return -1; |
| 564 |
|
| 565 |
// currently SVQ3 decoder expect full STSD header - so let's fake it
|
| 566 |
// this should be fixed and just SMI header should be passed
|
| 567 |
av_free(st->codec->extradata); |
| 568 |
st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
|
| 569 |
if (!st->codec->extradata)
|
| 570 |
return AVERROR(ENOMEM);
|
| 571 |
st->codec->extradata_size = 0x5a + atom.size;
|
| 572 |
memcpy(st->codec->extradata, "SVQ3", 4); // fake |
| 573 |
get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
|
| 574 |
dprintf(c->fc, "Reading SMI %"PRId64" %s\n", atom.size, st->codec->extradata + 0x5a); |
| 575 |
return 0; |
| 576 |
} |
| 577 |
|
| 578 |
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 579 |
{
|
| 580 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 581 |
int little_endian = get_be16(pb);
|
| 582 |
|
| 583 |
dprintf(c->fc, "enda %d\n", little_endian);
|
| 584 |
if (little_endian == 1) { |
| 585 |
switch (st->codec->codec_id) {
|
| 586 |
case CODEC_ID_PCM_S24BE:
|
| 587 |
st->codec->codec_id = CODEC_ID_PCM_S24LE; |
| 588 |
break;
|
| 589 |
case CODEC_ID_PCM_S32BE:
|
| 590 |
st->codec->codec_id = CODEC_ID_PCM_S32LE; |
| 591 |
break;
|
| 592 |
case CODEC_ID_PCM_F32BE:
|
| 593 |
st->codec->codec_id = CODEC_ID_PCM_F32LE; |
| 594 |
break;
|
| 595 |
case CODEC_ID_PCM_F64BE:
|
| 596 |
st->codec->codec_id = CODEC_ID_PCM_F64LE; |
| 597 |
break;
|
| 598 |
default:
|
| 599 |
break;
|
| 600 |
} |
| 601 |
} |
| 602 |
return 0; |
| 603 |
} |
| 604 |
|
| 605 |
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
|
| 606 |
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 607 |
{
|
| 608 |
AVStream *st; |
| 609 |
uint64_t size; |
| 610 |
uint8_t *buf; |
| 611 |
|
| 612 |
if (c->fc->nb_streams < 1) // will happen with jp2 files |
| 613 |
return 0; |
| 614 |
st= c->fc->streams[c->fc->nb_streams-1];
|
| 615 |
size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
|
| 616 |
if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
|
| 617 |
return -1; |
| 618 |
buf= av_realloc(st->codec->extradata, size); |
| 619 |
if(!buf)
|
| 620 |
return -1; |
| 621 |
st->codec->extradata= buf; |
| 622 |
buf+= st->codec->extradata_size; |
| 623 |
st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE; |
| 624 |
AV_WB32( buf , atom.size + 8);
|
| 625 |
AV_WL32( buf + 4, atom.type);
|
| 626 |
get_buffer(pb, buf + 8, atom.size);
|
| 627 |
return 0; |
| 628 |
} |
| 629 |
|
| 630 |
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 631 |
{
|
| 632 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 633 |
|
| 634 |
if((uint64_t)atom.size > (1<<30)) |
| 635 |
return -1; |
| 636 |
|
| 637 |
if (st->codec->codec_id == CODEC_ID_QDM2) {
|
| 638 |
// pass all frma atom to codec, needed at least for QDM2
|
| 639 |
av_free(st->codec->extradata); |
| 640 |
st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE); |
| 641 |
if (!st->codec->extradata)
|
| 642 |
return AVERROR(ENOMEM);
|
| 643 |
st->codec->extradata_size = atom.size; |
| 644 |
get_buffer(pb, st->codec->extradata, atom.size); |
| 645 |
} else if (atom.size > 8) { /* to read frma, esds atoms */ |
| 646 |
if (mov_read_default(c, pb, atom) < 0) |
| 647 |
return -1; |
| 648 |
} else
|
| 649 |
url_fskip(pb, atom.size); |
| 650 |
return 0; |
| 651 |
} |
| 652 |
|
| 653 |
/**
|
| 654 |
* This function reads atom content and puts data in extradata without tag
|
| 655 |
* nor size unlike mov_read_extradata.
|
| 656 |
*/
|
| 657 |
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 658 |
{
|
| 659 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 660 |
|
| 661 |
if((uint64_t)atom.size > (1<<30)) |
| 662 |
return -1; |
| 663 |
|
| 664 |
av_free(st->codec->extradata); |
| 665 |
st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE); |
| 666 |
if (!st->codec->extradata)
|
| 667 |
return AVERROR(ENOMEM);
|
| 668 |
st->codec->extradata_size = atom.size; |
| 669 |
get_buffer(pb, st->codec->extradata, atom.size); |
| 670 |
return 0; |
| 671 |
} |
| 672 |
|
| 673 |
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 674 |
{
|
| 675 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 676 |
MOVStreamContext *sc = st->priv_data; |
| 677 |
unsigned int i, entries; |
| 678 |
|
| 679 |
get_byte(pb); /* version */
|
| 680 |
get_be24(pb); /* flags */
|
| 681 |
|
| 682 |
entries = get_be32(pb); |
| 683 |
|
| 684 |
if(entries >= UINT_MAX/sizeof(int64_t)) |
| 685 |
return -1; |
| 686 |
|
| 687 |
sc->chunk_count = entries; |
| 688 |
sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
|
| 689 |
if (!sc->chunk_offsets)
|
| 690 |
return -1; |
| 691 |
if (atom.type == MKTAG('s','t','c','o')) |
| 692 |
for(i=0; i<entries; i++) |
| 693 |
sc->chunk_offsets[i] = get_be32(pb); |
| 694 |
else if (atom.type == MKTAG('c','o','6','4')) |
| 695 |
for(i=0; i<entries; i++) |
| 696 |
sc->chunk_offsets[i] = get_be64(pb); |
| 697 |
else
|
| 698 |
return -1; |
| 699 |
|
| 700 |
return 0; |
| 701 |
} |
| 702 |
|
| 703 |
/**
|
| 704 |
* Compute codec id for 'lpcm' tag.
|
| 705 |
* See CoreAudioTypes and AudioStreamBasicDescription at Apple.
|
| 706 |
*/
|
| 707 |
static enum CodecID mov_get_lpcm_codec_id(int bps, int flags) |
| 708 |
{
|
| 709 |
if (flags & 1) { // floating point |
| 710 |
if (flags & 2) { // big endian |
| 711 |
if (bps == 32) return CODEC_ID_PCM_F32BE; |
| 712 |
else if (bps == 64) return CODEC_ID_PCM_F64BE; |
| 713 |
} else {
|
| 714 |
if (bps == 32) return CODEC_ID_PCM_F32LE; |
| 715 |
else if (bps == 64) return CODEC_ID_PCM_F64LE; |
| 716 |
} |
| 717 |
} else {
|
| 718 |
if (flags & 2) { |
| 719 |
if (bps == 8) |
| 720 |
// signed integer
|
| 721 |
if (flags & 4) return CODEC_ID_PCM_S8; |
| 722 |
else return CODEC_ID_PCM_U8; |
| 723 |
else if (bps == 16) return CODEC_ID_PCM_S16BE; |
| 724 |
else if (bps == 24) return CODEC_ID_PCM_S24BE; |
| 725 |
else if (bps == 32) return CODEC_ID_PCM_S32BE; |
| 726 |
} else {
|
| 727 |
if (bps == 8) |
| 728 |
if (flags & 4) return CODEC_ID_PCM_S8; |
| 729 |
else return CODEC_ID_PCM_U8; |
| 730 |
else if (bps == 16) return CODEC_ID_PCM_S16LE; |
| 731 |
else if (bps == 24) return CODEC_ID_PCM_S24LE; |
| 732 |
else if (bps == 32) return CODEC_ID_PCM_S32LE; |
| 733 |
} |
| 734 |
} |
| 735 |
return CODEC_ID_NONE;
|
| 736 |
} |
| 737 |
|
| 738 |
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 739 |
{
|
| 740 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 741 |
MOVStreamContext *sc = st->priv_data; |
| 742 |
int j, entries, pseudo_stream_id;
|
| 743 |
|
| 744 |
get_byte(pb); /* version */
|
| 745 |
get_be24(pb); /* flags */
|
| 746 |
|
| 747 |
entries = get_be32(pb); |
| 748 |
|
| 749 |
for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) { |
| 750 |
//Parsing Sample description table
|
| 751 |
enum CodecID id;
|
| 752 |
int dref_id;
|
| 753 |
MOVAtom a = { 0, 0, 0 };
|
| 754 |
int64_t start_pos = url_ftell(pb); |
| 755 |
int size = get_be32(pb); /* size */ |
| 756 |
uint32_t format = get_le32(pb); /* data format */
|
| 757 |
|
| 758 |
get_be32(pb); /* reserved */
|
| 759 |
get_be16(pb); /* reserved */
|
| 760 |
dref_id = get_be16(pb); |
| 761 |
|
| 762 |
if (st->codec->codec_tag &&
|
| 763 |
st->codec->codec_tag != format && |
| 764 |
(c->fc->video_codec_id ? codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id |
| 765 |
: st->codec->codec_tag != MKTAG('j','p','e','g')) |
| 766 |
){
|
| 767 |
/* Multiple fourcc, we skip JPEG. This is not correct, we should
|
| 768 |
* export it as a separate AVStream but this needs a few changes
|
| 769 |
* in the MOV demuxer, patch welcome. */
|
| 770 |
av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
|
| 771 |
url_fskip(pb, size - (url_ftell(pb) - start_pos)); |
| 772 |
continue;
|
| 773 |
} |
| 774 |
sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
|
| 775 |
sc->dref_id= dref_id; |
| 776 |
|
| 777 |
st->codec->codec_tag = format; |
| 778 |
id = codec_get_id(codec_movaudio_tags, format); |
| 779 |
if (id<=0 && (format&0xFFFF) == 'm'+('s'<<8)) |
| 780 |
id = codec_get_id(codec_wav_tags, bswap_32(format)&0xFFFF);
|
| 781 |
|
| 782 |
if (st->codec->codec_type != CODEC_TYPE_VIDEO && id > 0) { |
| 783 |
st->codec->codec_type = CODEC_TYPE_AUDIO; |
| 784 |
} else if (st->codec->codec_type != CODEC_TYPE_AUDIO && /* do not overwrite codec type */ |
| 785 |
format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */ |
| 786 |
id = codec_get_id(codec_movvideo_tags, format); |
| 787 |
if (id <= 0) |
| 788 |
id = codec_get_id(codec_bmp_tags, format); |
| 789 |
if (id > 0) |
| 790 |
st->codec->codec_type = CODEC_TYPE_VIDEO; |
| 791 |
else if(st->codec->codec_type == CODEC_TYPE_DATA){ |
| 792 |
id = codec_get_id(ff_codec_movsubtitle_tags, format); |
| 793 |
if(id > 0) |
| 794 |
st->codec->codec_type = CODEC_TYPE_SUBTITLE; |
| 795 |
} |
| 796 |
} |
| 797 |
|
| 798 |
dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
|
| 799 |
(format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff, |
| 800 |
(format >> 24) & 0xff, st->codec->codec_type); |
| 801 |
|
| 802 |
if(st->codec->codec_type==CODEC_TYPE_VIDEO) {
|
| 803 |
uint8_t codec_name[32];
|
| 804 |
unsigned int color_depth; |
| 805 |
int color_greyscale;
|
| 806 |
|
| 807 |
st->codec->codec_id = id; |
| 808 |
get_be16(pb); /* version */
|
| 809 |
get_be16(pb); /* revision level */
|
| 810 |
get_be32(pb); /* vendor */
|
| 811 |
get_be32(pb); /* temporal quality */
|
| 812 |
get_be32(pb); /* spatial quality */
|
| 813 |
|
| 814 |
st->codec->width = get_be16(pb); /* width */
|
| 815 |
st->codec->height = get_be16(pb); /* height */
|
| 816 |
|
| 817 |
get_be32(pb); /* horiz resolution */
|
| 818 |
get_be32(pb); /* vert resolution */
|
| 819 |
get_be32(pb); /* data size, always 0 */
|
| 820 |
get_be16(pb); /* frames per samples */
|
| 821 |
|
| 822 |
get_buffer(pb, codec_name, 32); /* codec name, pascal string */ |
| 823 |
if (codec_name[0] <= 31) { |
| 824 |
memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]); |
| 825 |
st->codec->codec_name[codec_name[0]] = 0; |
| 826 |
} |
| 827 |
|
| 828 |
st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
|
| 829 |
st->codec->color_table_id = get_be16(pb); /* colortable id */
|
| 830 |
dprintf(c->fc, "depth %d, ctab id %d\n",
|
| 831 |
st->codec->bits_per_coded_sample, st->codec->color_table_id); |
| 832 |
/* figure out the palette situation */
|
| 833 |
color_depth = st->codec->bits_per_coded_sample & 0x1F;
|
| 834 |
color_greyscale = st->codec->bits_per_coded_sample & 0x20;
|
| 835 |
|
| 836 |
/* if the depth is 2, 4, or 8 bpp, file is palettized */
|
| 837 |
if ((color_depth == 2) || (color_depth == 4) || |
| 838 |
(color_depth == 8)) {
|
| 839 |
/* for palette traversal */
|
| 840 |
unsigned int color_start, color_count, color_end; |
| 841 |
unsigned char r, g, b; |
| 842 |
|
| 843 |
if (color_greyscale) {
|
| 844 |
int color_index, color_dec;
|
| 845 |
/* compute the greyscale palette */
|
| 846 |
st->codec->bits_per_coded_sample = color_depth; |
| 847 |
color_count = 1 << color_depth;
|
| 848 |
color_index = 255;
|
| 849 |
color_dec = 256 / (color_count - 1); |
| 850 |
for (j = 0; j < color_count; j++) { |
| 851 |
r = g = b = color_index; |
| 852 |
c->palette_control.palette[j] = |
| 853 |
(r << 16) | (g << 8) | (b); |
| 854 |
color_index -= color_dec; |
| 855 |
if (color_index < 0) |
| 856 |
color_index = 0;
|
| 857 |
} |
| 858 |
} else if (st->codec->color_table_id) { |
| 859 |
const uint8_t *color_table;
|
| 860 |
/* if flag bit 3 is set, use the default palette */
|
| 861 |
color_count = 1 << color_depth;
|
| 862 |
if (color_depth == 2) |
| 863 |
color_table = ff_qt_default_palette_4; |
| 864 |
else if (color_depth == 4) |
| 865 |
color_table = ff_qt_default_palette_16; |
| 866 |
else
|
| 867 |
color_table = ff_qt_default_palette_256; |
| 868 |
|
| 869 |
for (j = 0; j < color_count; j++) { |
| 870 |
r = color_table[j * 4 + 0]; |
| 871 |
g = color_table[j * 4 + 1]; |
| 872 |
b = color_table[j * 4 + 2]; |
| 873 |
c->palette_control.palette[j] = |
| 874 |
(r << 16) | (g << 8) | (b); |
| 875 |
} |
| 876 |
} else {
|
| 877 |
/* load the palette from the file */
|
| 878 |
color_start = get_be32(pb); |
| 879 |
color_count = get_be16(pb); |
| 880 |
color_end = get_be16(pb); |
| 881 |
if ((color_start <= 255) && |
| 882 |
(color_end <= 255)) {
|
| 883 |
for (j = color_start; j <= color_end; j++) {
|
| 884 |
/* each R, G, or B component is 16 bits;
|
| 885 |
* only use the top 8 bits; skip alpha bytes
|
| 886 |
* up front */
|
| 887 |
get_byte(pb); |
| 888 |
get_byte(pb); |
| 889 |
r = get_byte(pb); |
| 890 |
get_byte(pb); |
| 891 |
g = get_byte(pb); |
| 892 |
get_byte(pb); |
| 893 |
b = get_byte(pb); |
| 894 |
get_byte(pb); |
| 895 |
c->palette_control.palette[j] = |
| 896 |
(r << 16) | (g << 8) | (b); |
| 897 |
} |
| 898 |
} |
| 899 |
} |
| 900 |
st->codec->palctrl = &c->palette_control; |
| 901 |
st->codec->palctrl->palette_changed = 1;
|
| 902 |
} else
|
| 903 |
st->codec->palctrl = NULL;
|
| 904 |
} else if(st->codec->codec_type==CODEC_TYPE_AUDIO) { |
| 905 |
int bits_per_sample, flags;
|
| 906 |
uint16_t version = get_be16(pb); |
| 907 |
|
| 908 |
st->codec->codec_id = id; |
| 909 |
get_be16(pb); /* revision level */
|
| 910 |
get_be32(pb); /* vendor */
|
| 911 |
|
| 912 |
st->codec->channels = get_be16(pb); /* channel count */
|
| 913 |
dprintf(c->fc, "audio channels %d\n", st->codec->channels);
|
| 914 |
st->codec->bits_per_coded_sample = get_be16(pb); /* sample size */
|
| 915 |
|
| 916 |
sc->audio_cid = get_be16(pb); |
| 917 |
get_be16(pb); /* packet size = 0 */
|
| 918 |
|
| 919 |
st->codec->sample_rate = ((get_be32(pb) >> 16));
|
| 920 |
|
| 921 |
//Read QT version 1 fields. In version 0 these do not exist.
|
| 922 |
dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
|
| 923 |
if(!c->isom) {
|
| 924 |
if(version==1) { |
| 925 |
sc->samples_per_frame = get_be32(pb); |
| 926 |
get_be32(pb); /* bytes per packet */
|
| 927 |
sc->bytes_per_frame = get_be32(pb); |
| 928 |
get_be32(pb); /* bytes per sample */
|
| 929 |
} else if(version==2) { |
| 930 |
get_be32(pb); /* sizeof struct only */
|
| 931 |
st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
|
| 932 |
st->codec->channels = get_be32(pb); |
| 933 |
get_be32(pb); /* always 0x7F000000 */
|
| 934 |
st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
|
| 935 |
flags = get_be32(pb); /* lcpm format specific flag */
|
| 936 |
sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
|
| 937 |
sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
|
| 938 |
if (format == MKTAG('l','p','c','m')) |
| 939 |
st->codec->codec_id = mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags); |
| 940 |
} |
| 941 |
} |
| 942 |
|
| 943 |
switch (st->codec->codec_id) {
|
| 944 |
case CODEC_ID_PCM_S8:
|
| 945 |
case CODEC_ID_PCM_U8:
|
| 946 |
if (st->codec->bits_per_coded_sample == 16) |
| 947 |
st->codec->codec_id = CODEC_ID_PCM_S16BE; |
| 948 |
break;
|
| 949 |
case CODEC_ID_PCM_S16LE:
|
| 950 |
case CODEC_ID_PCM_S16BE:
|
| 951 |
if (st->codec->bits_per_coded_sample == 8) |
| 952 |
st->codec->codec_id = CODEC_ID_PCM_S8; |
| 953 |
else if (st->codec->bits_per_coded_sample == 24) |
| 954 |
st->codec->codec_id = |
| 955 |
st->codec->codec_id == CODEC_ID_PCM_S16BE ? |
| 956 |
CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE; |
| 957 |
break;
|
| 958 |
/* set values for old format before stsd version 1 appeared */
|
| 959 |
case CODEC_ID_MACE3:
|
| 960 |
sc->samples_per_frame = 6;
|
| 961 |
sc->bytes_per_frame = 2*st->codec->channels;
|
| 962 |
break;
|
| 963 |
case CODEC_ID_MACE6:
|
| 964 |
sc->samples_per_frame = 6;
|
| 965 |
sc->bytes_per_frame = 1*st->codec->channels;
|
| 966 |
break;
|
| 967 |
case CODEC_ID_ADPCM_IMA_QT:
|
| 968 |
sc->samples_per_frame = 64;
|
| 969 |
sc->bytes_per_frame = 34*st->codec->channels;
|
| 970 |
break;
|
| 971 |
case CODEC_ID_GSM:
|
| 972 |
sc->samples_per_frame = 160;
|
| 973 |
sc->bytes_per_frame = 33;
|
| 974 |
break;
|
| 975 |
default:
|
| 976 |
break;
|
| 977 |
} |
| 978 |
|
| 979 |
bits_per_sample = av_get_bits_per_sample(st->codec->codec_id); |
| 980 |
if (bits_per_sample) {
|
| 981 |
st->codec->bits_per_coded_sample = bits_per_sample; |
| 982 |
sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
|
| 983 |
} |
| 984 |
} else if(st->codec->codec_type==CODEC_TYPE_SUBTITLE){ |
| 985 |
// ttxt stsd contains display flags, justification, background
|
| 986 |
// color, fonts, and default styles, so fake an atom to read it
|
| 987 |
MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
|
| 988 |
mov_read_glbl(c, pb, fake_atom); |
| 989 |
st->codec->codec_id= id; |
| 990 |
st->codec->width = sc->width; |
| 991 |
st->codec->height = sc->height; |
| 992 |
} else {
|
| 993 |
/* other codec type, just skip (rtp, mp4s, tmcd ...) */
|
| 994 |
url_fskip(pb, size - (url_ftell(pb) - start_pos)); |
| 995 |
} |
| 996 |
/* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
|
| 997 |
a.size = size - (url_ftell(pb) - start_pos); |
| 998 |
if (a.size > 8) { |
| 999 |
if (mov_read_default(c, pb, a) < 0) |
| 1000 |
return -1; |
| 1001 |
} else if (a.size > 0) |
| 1002 |
url_fskip(pb, a.size); |
| 1003 |
} |
| 1004 |
|
| 1005 |
if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1) |
| 1006 |
st->codec->sample_rate= sc->time_scale; |
| 1007 |
|
| 1008 |
/* special codec parameters handling */
|
| 1009 |
switch (st->codec->codec_id) {
|
| 1010 |
#if CONFIG_DV_DEMUXER
|
| 1011 |
case CODEC_ID_DVAUDIO:
|
| 1012 |
c->dv_fctx = avformat_alloc_context(); |
| 1013 |
c->dv_demux = dv_init_demux(c->dv_fctx); |
| 1014 |
if (!c->dv_demux) {
|
| 1015 |
av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
|
| 1016 |
return -1; |
| 1017 |
} |
| 1018 |
sc->dv_audio_container = 1;
|
| 1019 |
st->codec->codec_id = CODEC_ID_PCM_S16LE; |
| 1020 |
break;
|
| 1021 |
#endif
|
| 1022 |
/* no ifdef since parameters are always those */
|
| 1023 |
case CODEC_ID_QCELP:
|
| 1024 |
st->codec->frame_size= 160;
|
| 1025 |
st->codec->channels= 1; /* really needed */ |
| 1026 |
break;
|
| 1027 |
case CODEC_ID_AMR_NB:
|
| 1028 |
case CODEC_ID_AMR_WB:
|
| 1029 |
st->codec->frame_size= sc->samples_per_frame; |
| 1030 |
st->codec->channels= 1; /* really needed */ |
| 1031 |
/* force sample rate for amr, stsd in 3gp does not store sample rate */
|
| 1032 |
if (st->codec->codec_id == CODEC_ID_AMR_NB)
|
| 1033 |
st->codec->sample_rate = 8000;
|
| 1034 |
else if (st->codec->codec_id == CODEC_ID_AMR_WB) |
| 1035 |
st->codec->sample_rate = 16000;
|
| 1036 |
break;
|
| 1037 |
case CODEC_ID_MP2:
|
| 1038 |
case CODEC_ID_MP3:
|
| 1039 |
st->codec->codec_type = CODEC_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
|
| 1040 |
st->need_parsing = AVSTREAM_PARSE_FULL; |
| 1041 |
break;
|
| 1042 |
case CODEC_ID_GSM:
|
| 1043 |
case CODEC_ID_ADPCM_MS:
|
| 1044 |
case CODEC_ID_ADPCM_IMA_WAV:
|
| 1045 |
st->codec->block_align = sc->bytes_per_frame; |
| 1046 |
break;
|
| 1047 |
case CODEC_ID_ALAC:
|
| 1048 |
if (st->codec->extradata_size == 36) { |
| 1049 |
st->codec->frame_size = AV_RB32(st->codec->extradata+12);
|
| 1050 |
st->codec->channels = AV_RB8 (st->codec->extradata+21);
|
| 1051 |
} |
| 1052 |
break;
|
| 1053 |
default:
|
| 1054 |
break;
|
| 1055 |
} |
| 1056 |
|
| 1057 |
return 0; |
| 1058 |
} |
| 1059 |
|
| 1060 |
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 1061 |
{
|
| 1062 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 1063 |
MOVStreamContext *sc = st->priv_data; |
| 1064 |
unsigned int i, entries; |
| 1065 |
|
| 1066 |
get_byte(pb); /* version */
|
| 1067 |
get_be24(pb); /* flags */
|
| 1068 |
|
| 1069 |
entries = get_be32(pb); |
| 1070 |
|
| 1071 |
if(entries >= UINT_MAX / sizeof(*sc->sample_to_chunk)) |
| 1072 |
return -1; |
| 1073 |
|
| 1074 |
dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries); |
| 1075 |
|
| 1076 |
sc->sample_to_chunk_sz = entries; |
| 1077 |
sc->sample_to_chunk = av_malloc(entries * sizeof(*sc->sample_to_chunk));
|
| 1078 |
if (!sc->sample_to_chunk)
|
| 1079 |
return -1; |
| 1080 |
for(i=0; i<entries; i++) { |
| 1081 |
sc->sample_to_chunk[i].first = get_be32(pb); |
| 1082 |
sc->sample_to_chunk[i].count = get_be32(pb); |
| 1083 |
sc->sample_to_chunk[i].id = get_be32(pb); |
| 1084 |
} |
| 1085 |
return 0; |
| 1086 |
} |
| 1087 |
|
| 1088 |
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 1089 |
{
|
| 1090 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 1091 |
MOVStreamContext *sc = st->priv_data; |
| 1092 |
unsigned int i, entries; |
| 1093 |
|
| 1094 |
get_byte(pb); /* version */
|
| 1095 |
get_be24(pb); /* flags */
|
| 1096 |
|
| 1097 |
entries = get_be32(pb); |
| 1098 |
|
| 1099 |
if(entries >= UINT_MAX / sizeof(int)) |
| 1100 |
return -1; |
| 1101 |
|
| 1102 |
sc->keyframe_count = entries; |
| 1103 |
|
| 1104 |
dprintf(c->fc, "keyframe_count = %d\n", sc->keyframe_count);
|
| 1105 |
|
| 1106 |
sc->keyframes = av_malloc(entries * sizeof(int)); |
| 1107 |
if (!sc->keyframes)
|
| 1108 |
return -1; |
| 1109 |
for(i=0; i<entries; i++) { |
| 1110 |
sc->keyframes[i] = get_be32(pb); |
| 1111 |
//dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
|
| 1112 |
} |
| 1113 |
return 0; |
| 1114 |
} |
| 1115 |
|
| 1116 |
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 1117 |
{
|
| 1118 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 1119 |
MOVStreamContext *sc = st->priv_data; |
| 1120 |
unsigned int i, entries, sample_size; |
| 1121 |
|
| 1122 |
get_byte(pb); /* version */
|
| 1123 |
get_be24(pb); /* flags */
|
| 1124 |
|
| 1125 |
sample_size = get_be32(pb); |
| 1126 |
if (!sc->sample_size) /* do not overwrite value computed in stsd */ |
| 1127 |
sc->sample_size = sample_size; |
| 1128 |
entries = get_be32(pb); |
| 1129 |
if(entries >= UINT_MAX / sizeof(int)) |
| 1130 |
return -1; |
| 1131 |
|
| 1132 |
sc->sample_count = entries; |
| 1133 |
if (sample_size)
|
| 1134 |
return 0; |
| 1135 |
|
| 1136 |
dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, sc->sample_count);
|
| 1137 |
|
| 1138 |
sc->sample_sizes = av_malloc(entries * sizeof(int)); |
| 1139 |
if (!sc->sample_sizes)
|
| 1140 |
return -1; |
| 1141 |
for(i=0; i<entries; i++) |
| 1142 |
sc->sample_sizes[i] = get_be32(pb); |
| 1143 |
return 0; |
| 1144 |
} |
| 1145 |
|
| 1146 |
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 1147 |
{
|
| 1148 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 1149 |
MOVStreamContext *sc = st->priv_data; |
| 1150 |
unsigned int i, entries; |
| 1151 |
int64_t duration=0;
|
| 1152 |
int64_t total_sample_count=0;
|
| 1153 |
|
| 1154 |
get_byte(pb); /* version */
|
| 1155 |
get_be24(pb); /* flags */
|
| 1156 |
entries = get_be32(pb); |
| 1157 |
if(entries >= UINT_MAX / sizeof(*sc->stts_data)) |
| 1158 |
return -1; |
| 1159 |
|
| 1160 |
sc->stts_count = entries; |
| 1161 |
sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
|
| 1162 |
if (!sc->stts_data)
|
| 1163 |
return -1; |
| 1164 |
dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries); |
| 1165 |
|
| 1166 |
sc->time_rate=0;
|
| 1167 |
|
| 1168 |
for(i=0; i<entries; i++) { |
| 1169 |
int sample_duration;
|
| 1170 |
int sample_count;
|
| 1171 |
|
| 1172 |
sample_count=get_be32(pb); |
| 1173 |
sample_duration = get_be32(pb); |
| 1174 |
sc->stts_data[i].count= sample_count; |
| 1175 |
sc->stts_data[i].duration= sample_duration; |
| 1176 |
|
| 1177 |
sc->time_rate= av_gcd(sc->time_rate, sample_duration); |
| 1178 |
|
| 1179 |
dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
|
| 1180 |
|
| 1181 |
duration+=(int64_t)sample_duration*sample_count; |
| 1182 |
total_sample_count+=sample_count; |
| 1183 |
} |
| 1184 |
|
| 1185 |
st->nb_frames= total_sample_count; |
| 1186 |
if(duration)
|
| 1187 |
st->duration= duration; |
| 1188 |
return 0; |
| 1189 |
} |
| 1190 |
|
| 1191 |
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 1192 |
{
|
| 1193 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 1194 |
MOVStreamContext *sc = st->priv_data; |
| 1195 |
unsigned int i, entries; |
| 1196 |
|
| 1197 |
get_byte(pb); /* version */
|
| 1198 |
get_be24(pb); /* flags */
|
| 1199 |
entries = get_be32(pb); |
| 1200 |
if(entries >= UINT_MAX / sizeof(*sc->ctts_data)) |
| 1201 |
return -1; |
| 1202 |
|
| 1203 |
sc->ctts_count = entries; |
| 1204 |
sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
|
| 1205 |
if (!sc->ctts_data)
|
| 1206 |
return -1; |
| 1207 |
dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries); |
| 1208 |
|
| 1209 |
for(i=0; i<entries; i++) { |
| 1210 |
int count =get_be32(pb);
|
| 1211 |
int duration =get_be32(pb);
|
| 1212 |
|
| 1213 |
if (duration < 0) { |
| 1214 |
sc->wrong_dts = 1;
|
| 1215 |
st->codec->has_b_frames = 1;
|
| 1216 |
} |
| 1217 |
sc->ctts_data[i].count = count; |
| 1218 |
sc->ctts_data[i].duration= duration; |
| 1219 |
|
| 1220 |
sc->time_rate= av_gcd(sc->time_rate, FFABS(duration)); |
| 1221 |
} |
| 1222 |
return 0; |
| 1223 |
} |
| 1224 |
|
| 1225 |
static void mov_build_index(MOVContext *mov, AVStream *st) |
| 1226 |
{
|
| 1227 |
MOVStreamContext *sc = st->priv_data; |
| 1228 |
int64_t current_offset; |
| 1229 |
int64_t current_dts = 0;
|
| 1230 |
unsigned int stts_index = 0; |
| 1231 |
unsigned int stsc_index = 0; |
| 1232 |
unsigned int stss_index = 0; |
| 1233 |
unsigned int i, j; |
| 1234 |
|
| 1235 |
/* adjust first dts according to edit list */
|
| 1236 |
if (sc->time_offset) {
|
| 1237 |
assert(sc->time_offset % sc->time_rate == 0);
|
| 1238 |
current_dts = - (sc->time_offset / sc->time_rate); |
| 1239 |
} |
| 1240 |
|
| 1241 |
/* only use old uncompressed audio chunk demuxing when stts specifies it */
|
| 1242 |
if (!(st->codec->codec_type == CODEC_TYPE_AUDIO &&
|
| 1243 |
sc->stts_count == 1 && sc->stts_data[0].duration == 1)) { |
| 1244 |
unsigned int current_sample = 0; |
| 1245 |
unsigned int stts_sample = 0; |
| 1246 |
unsigned int keyframe, sample_size; |
| 1247 |
unsigned int distance = 0; |
| 1248 |
int key_off = sc->keyframes && sc->keyframes[0] == 1; |
| 1249 |
|
| 1250 |
st->nb_frames = sc->sample_count; |
| 1251 |
for (i = 0; i < sc->chunk_count; i++) { |
| 1252 |
current_offset = sc->chunk_offsets[i]; |
| 1253 |
if (stsc_index + 1 < sc->sample_to_chunk_sz && |
| 1254 |
i + 1 == sc->sample_to_chunk[stsc_index + 1].first) |
| 1255 |
stsc_index++; |
| 1256 |
for (j = 0; j < sc->sample_to_chunk[stsc_index].count; j++) { |
| 1257 |
if (current_sample >= sc->sample_count) {
|
| 1258 |
av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
|
| 1259 |
goto out;
|
| 1260 |
} |
| 1261 |
keyframe = !sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index]; |
| 1262 |
if (keyframe) {
|
| 1263 |
distance = 0;
|
| 1264 |
if (stss_index + 1 < sc->keyframe_count) |
| 1265 |
stss_index++; |
| 1266 |
} |
| 1267 |
sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
|
| 1268 |
if(sc->pseudo_stream_id == -1 || |
| 1269 |
sc->sample_to_chunk[stsc_index].id - 1 == sc->pseudo_stream_id) {
|
| 1270 |
av_add_index_entry(st, current_offset, current_dts, sample_size, distance, |
| 1271 |
keyframe ? AVINDEX_KEYFRAME : 0);
|
| 1272 |
dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", " |
| 1273 |
"size %d, distance %d, keyframe %d\n", st->index, current_sample,
|
| 1274 |
current_offset, current_dts, sample_size, distance, keyframe); |
| 1275 |
} |
| 1276 |
current_offset += sample_size; |
| 1277 |
assert(sc->stts_data[stts_index].duration % sc->time_rate == 0);
|
| 1278 |
current_dts += sc->stts_data[stts_index].duration / sc->time_rate; |
| 1279 |
distance++; |
| 1280 |
stts_sample++; |
| 1281 |
current_sample++; |
| 1282 |
if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) { |
| 1283 |
stts_sample = 0;
|
| 1284 |
stts_index++; |
| 1285 |
} |
| 1286 |
} |
| 1287 |
} |
| 1288 |
} else { /* read whole chunk */ |
| 1289 |
unsigned int chunk_samples, chunk_size, chunk_duration; |
| 1290 |
unsigned int frames = 1; |
| 1291 |
for (i = 0; i < sc->chunk_count; i++) { |
| 1292 |
current_offset = sc->chunk_offsets[i]; |
| 1293 |
if (stsc_index + 1 < sc->sample_to_chunk_sz && |
| 1294 |
i + 1 == sc->sample_to_chunk[stsc_index + 1].first) |
| 1295 |
stsc_index++; |
| 1296 |
chunk_samples = sc->sample_to_chunk[stsc_index].count; |
| 1297 |
/* get chunk size, beware of alaw/ulaw/mace */
|
| 1298 |
if (sc->samples_per_frame > 0 && |
| 1299 |
(chunk_samples * sc->bytes_per_frame % sc->samples_per_frame == 0)) {
|
| 1300 |
if (sc->samples_per_frame < 160) |
| 1301 |
chunk_size = chunk_samples * sc->bytes_per_frame / sc->samples_per_frame; |
| 1302 |
else {
|
| 1303 |
chunk_size = sc->bytes_per_frame; |
| 1304 |
frames = chunk_samples / sc->samples_per_frame; |
| 1305 |
chunk_samples = sc->samples_per_frame; |
| 1306 |
} |
| 1307 |
} else
|
| 1308 |
chunk_size = chunk_samples * sc->sample_size; |
| 1309 |
for (j = 0; j < frames; j++) { |
| 1310 |
av_add_index_entry(st, current_offset, current_dts, chunk_size, 0, AVINDEX_KEYFRAME);
|
| 1311 |
/* get chunk duration */
|
| 1312 |
chunk_duration = 0;
|
| 1313 |
while (chunk_samples > 0) { |
| 1314 |
if (chunk_samples < sc->stts_data[stts_index].count) {
|
| 1315 |
chunk_duration += sc->stts_data[stts_index].duration * chunk_samples; |
| 1316 |
sc->stts_data[stts_index].count -= chunk_samples; |
| 1317 |
break;
|
| 1318 |
} else {
|
| 1319 |
chunk_duration += sc->stts_data[stts_index].duration * chunk_samples; |
| 1320 |
chunk_samples -= sc->stts_data[stts_index].count; |
| 1321 |
if (stts_index + 1 < sc->stts_count) |
| 1322 |
stts_index++; |
| 1323 |
} |
| 1324 |
} |
| 1325 |
current_offset += sc->bytes_per_frame; |
| 1326 |
dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", " |
| 1327 |
"size %d, duration %d\n", st->index, i, current_offset, current_dts,
|
| 1328 |
chunk_size, chunk_duration); |
| 1329 |
assert(chunk_duration % sc->time_rate == 0);
|
| 1330 |
current_dts += chunk_duration / sc->time_rate; |
| 1331 |
} |
| 1332 |
} |
| 1333 |
} |
| 1334 |
out:
|
| 1335 |
/* adjust sample count to avindex entries */
|
| 1336 |
sc->sample_count = st->nb_index_entries; |
| 1337 |
} |
| 1338 |
|
| 1339 |
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 1340 |
{
|
| 1341 |
AVStream *st; |
| 1342 |
MOVStreamContext *sc; |
| 1343 |
int ret;
|
| 1344 |
|
| 1345 |
st = av_new_stream(c->fc, c->fc->nb_streams); |
| 1346 |
if (!st) return AVERROR(ENOMEM); |
| 1347 |
sc = av_mallocz(sizeof(MOVStreamContext));
|
| 1348 |
if (!sc) return AVERROR(ENOMEM); |
| 1349 |
|
| 1350 |
st->priv_data = sc; |
| 1351 |
st->codec->codec_type = CODEC_TYPE_DATA; |
| 1352 |
st->start_time = 0; /* XXX: check */ |
| 1353 |
sc->ffindex = st->index; |
| 1354 |
|
| 1355 |
if ((ret = mov_read_default(c, pb, atom)) < 0) |
| 1356 |
return ret;
|
| 1357 |
|
| 1358 |
/* sanity checks */
|
| 1359 |
if(sc->chunk_count && (!sc->stts_count || !sc->sample_to_chunk_sz ||
|
| 1360 |
(!sc->sample_size && !sc->sample_count))){
|
| 1361 |
av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
|
| 1362 |
st->index); |
| 1363 |
sc->sample_count = 0; //ignore track |
| 1364 |
return 0; |
| 1365 |
} |
| 1366 |
if(!sc->time_rate)
|
| 1367 |
sc->time_rate=1;
|
| 1368 |
if(!sc->time_scale)
|
| 1369 |
sc->time_scale= c->time_scale; |
| 1370 |
av_set_pts_info(st, 64, sc->time_rate, sc->time_scale);
|
| 1371 |
|
| 1372 |
if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
|
| 1373 |
!st->codec->frame_size && sc->stts_count == 1)
|
| 1374 |
st->codec->frame_size = av_rescale(sc->time_rate, st->codec->sample_rate, sc->time_scale); |
| 1375 |
|
| 1376 |
if(st->duration != AV_NOPTS_VALUE){
|
| 1377 |
assert(st->duration % sc->time_rate == 0);
|
| 1378 |
st->duration /= sc->time_rate; |
| 1379 |
} |
| 1380 |
|
| 1381 |
mov_build_index(c, st); |
| 1382 |
|
| 1383 |
if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) { |
| 1384 |
if (url_fopen(&sc->pb, sc->drefs[sc->dref_id-1].path, URL_RDONLY) < 0) |
| 1385 |
av_log(c->fc, AV_LOG_ERROR, "stream %d, error opening file %s: %s\n",
|
| 1386 |
st->index, sc->drefs[sc->dref_id-1].path, strerror(errno));
|
| 1387 |
} else
|
| 1388 |
sc->pb = c->fc->pb; |
| 1389 |
|
| 1390 |
switch (st->codec->codec_id) {
|
| 1391 |
#if CONFIG_H261_DECODER
|
| 1392 |
case CODEC_ID_H261:
|
| 1393 |
#endif
|
| 1394 |
#if CONFIG_H263_DECODER
|
| 1395 |
case CODEC_ID_H263:
|
| 1396 |
#endif
|
| 1397 |
#if CONFIG_MPEG4_DECODER
|
| 1398 |
case CODEC_ID_MPEG4:
|
| 1399 |
#endif
|
| 1400 |
st->codec->width= 0; /* let decoder init width/height */ |
| 1401 |
st->codec->height= 0;
|
| 1402 |
break;
|
| 1403 |
} |
| 1404 |
|
| 1405 |
/* Do not need those anymore. */
|
| 1406 |
av_freep(&sc->chunk_offsets); |
| 1407 |
av_freep(&sc->sample_to_chunk); |
| 1408 |
av_freep(&sc->sample_sizes); |
| 1409 |
av_freep(&sc->keyframes); |
| 1410 |
av_freep(&sc->stts_data); |
| 1411 |
|
| 1412 |
return 0; |
| 1413 |
} |
| 1414 |
|
| 1415 |
static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 1416 |
{
|
| 1417 |
int ret;
|
| 1418 |
c->itunes_metadata = 1;
|
| 1419 |
ret = mov_read_default(c, pb, atom); |
| 1420 |
c->itunes_metadata = 0;
|
| 1421 |
return ret;
|
| 1422 |
} |
| 1423 |
|
| 1424 |
static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 1425 |
{
|
| 1426 |
url_fskip(pb, 4); // version + flags |
| 1427 |
atom.size -= 4;
|
| 1428 |
return mov_read_default(c, pb, atom);
|
| 1429 |
} |
| 1430 |
|
| 1431 |
static int mov_read_trkn(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 1432 |
{
|
| 1433 |
get_be32(pb); // type
|
| 1434 |
get_be32(pb); // unknown
|
| 1435 |
c->fc->track = get_be32(pb); |
| 1436 |
dprintf(c->fc, "%.4s %d\n", (char*)&atom.type, c->fc->track); |
| 1437 |
return 0; |
| 1438 |
} |
| 1439 |
|
| 1440 |
static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 1441 |
{
|
| 1442 |
char *str = NULL; |
| 1443 |
int size;
|
| 1444 |
uint16_t str_size; |
| 1445 |
|
| 1446 |
if (c->itunes_metadata) {
|
| 1447 |
int data_size = get_be32(pb);
|
| 1448 |
int tag = get_le32(pb);
|
| 1449 |
if (tag == MKTAG('d','a','t','a')) { |
| 1450 |
get_be32(pb); // type
|
| 1451 |
get_be32(pb); // unknown
|
| 1452 |
str_size = data_size - 16;
|
| 1453 |
atom.size -= 16;
|
| 1454 |
} else return 0; |
| 1455 |
} else {
|
| 1456 |
str_size = get_be16(pb); // string length
|
| 1457 |
get_be16(pb); // language
|
| 1458 |
atom.size -= 4;
|
| 1459 |
} |
| 1460 |
switch (atom.type) {
|
| 1461 |
case MKTAG(0xa9,'n','a','m'): |
| 1462 |
str = c->fc->title; size = sizeof(c->fc->title); break; |
| 1463 |
case MKTAG(0xa9,'A','R','T'): |
| 1464 |
case MKTAG(0xa9,'w','r','t'): |
| 1465 |
str = c->fc->author; size = sizeof(c->fc->author); break; |
| 1466 |
case MKTAG(0xa9,'c','p','y'): |
| 1467 |
str = c->fc->copyright; size = sizeof(c->fc->copyright); break; |
| 1468 |
case MKTAG(0xa9,'c','m','t'): |
| 1469 |
case MKTAG(0xa9,'i','n','f'): |
| 1470 |
str = c->fc->comment; size = sizeof(c->fc->comment); break; |
| 1471 |
case MKTAG(0xa9,'a','l','b'): |
| 1472 |
str = c->fc->album; size = sizeof(c->fc->album); break; |
| 1473 |
} |
| 1474 |
if (!str)
|
| 1475 |
return 0; |
| 1476 |
if (atom.size < 0) |
| 1477 |
return -1; |
| 1478 |
|
| 1479 |
get_buffer(pb, str, FFMIN3(size, str_size, atom.size)); |
| 1480 |
dprintf(c->fc, "%.4s %s %d %lld\n", (char*)&atom.type, str, str_size, atom.size); |
| 1481 |
return 0; |
| 1482 |
} |
| 1483 |
|
| 1484 |
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 1485 |
{
|
| 1486 |
int i;
|
| 1487 |
int width;
|
| 1488 |
int height;
|
| 1489 |
int64_t disp_transform[2];
|
| 1490 |
int display_matrix[3][2]; |
| 1491 |
AVStream *st = c->fc->streams[c->fc->nb_streams-1];
|
| 1492 |
MOVStreamContext *sc = st->priv_data; |
| 1493 |
int version = get_byte(pb);
|
| 1494 |
|
| 1495 |
get_be24(pb); /* flags */
|
| 1496 |
/*
|
| 1497 |
MOV_TRACK_ENABLED 0x0001
|
| 1498 |
MOV_TRACK_IN_MOVIE 0x0002
|
| 1499 |
MOV_TRACK_IN_PREVIEW 0x0004
|
| 1500 |
MOV_TRACK_IN_POSTER 0x0008
|
| 1501 |
*/
|
| 1502 |
|
| 1503 |
if (version == 1) { |
| 1504 |
get_be64(pb); |
| 1505 |
get_be64(pb); |
| 1506 |
} else {
|
| 1507 |
get_be32(pb); /* creation time */
|
| 1508 |
get_be32(pb); /* modification time */
|
| 1509 |
} |
| 1510 |
st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/ |
| 1511 |
get_be32(pb); /* reserved */
|
| 1512 |
st->start_time = 0; /* check */ |
| 1513 |
/* highlevel (considering edits) duration in movie timebase */
|
| 1514 |
(version == 1) ? get_be64(pb) : get_be32(pb);
|
| 1515 |
get_be32(pb); /* reserved */
|
| 1516 |
get_be32(pb); /* reserved */
|
| 1517 |
|
| 1518 |
get_be16(pb); /* layer */
|
| 1519 |
get_be16(pb); /* alternate group */
|
| 1520 |
get_be16(pb); /* volume */
|
| 1521 |
get_be16(pb); /* reserved */
|
| 1522 |
|
| 1523 |
//read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
|
| 1524 |
// they're kept in fixed point format through all calculations
|
| 1525 |
// ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
|
| 1526 |
for (i = 0; i < 3; i++) { |
| 1527 |
display_matrix[i][0] = get_be32(pb); // 16.16 fixed point |
| 1528 |
display_matrix[i][1] = get_be32(pb); // 16.16 fixed point |
| 1529 |
get_be32(pb); // 2.30 fixed point (not used)
|
| 1530 |
} |
| 1531 |
|
| 1532 |
width = get_be32(pb); // 16.16 fixed point track width
|
| 1533 |
height = get_be32(pb); // 16.16 fixed point track height
|
| 1534 |
sc->width = width >> 16;
|
| 1535 |
sc->height = height >> 16;
|
| 1536 |
|
| 1537 |
//transform the display width/height according to the matrix
|
| 1538 |
// skip this if the display matrix is the default identity matrix
|
| 1539 |
// to keep the same scale, use [width height 1<<16]
|
| 1540 |
if (width && height &&
|
| 1541 |
(display_matrix[0][0] != 65536 || display_matrix[0][1] || |
| 1542 |
display_matrix[1][0] || display_matrix[1][1] != 65536 || |
| 1543 |
display_matrix[2][0] || display_matrix[2][1])) { |
| 1544 |
for (i = 0; i < 2; i++) |
| 1545 |
disp_transform[i] = |
| 1546 |
(int64_t) width * display_matrix[0][i] +
|
| 1547 |
(int64_t) height * display_matrix[1][i] +
|
| 1548 |
((int64_t) display_matrix[2][i] << 16); |
| 1549 |
|
| 1550 |
//sample aspect ratio is new width/height divided by old width/height
|
| 1551 |
st->sample_aspect_ratio = av_d2q( |
| 1552 |
((double) disp_transform[0] * height) / |
| 1553 |
((double) disp_transform[1] * width), INT_MAX); |
| 1554 |
} |
| 1555 |
return 0; |
| 1556 |
} |
| 1557 |
|
| 1558 |
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 1559 |
{
|
| 1560 |
MOVFragment *frag = &c->fragment; |
| 1561 |
MOVTrackExt *trex = NULL;
|
| 1562 |
int flags, track_id, i;
|
| 1563 |
|
| 1564 |
get_byte(pb); /* version */
|
| 1565 |
flags = get_be24(pb); |
| 1566 |
|
| 1567 |
track_id = get_be32(pb); |
| 1568 |
if (!track_id || track_id > c->fc->nb_streams)
|
| 1569 |
return -1; |
| 1570 |
frag->track_id = track_id; |
| 1571 |
for (i = 0; i < c->trex_count; i++) |
| 1572 |
if (c->trex_data[i].track_id == frag->track_id) {
|
| 1573 |
trex = &c->trex_data[i]; |
| 1574 |
break;
|
| 1575 |
} |
| 1576 |
if (!trex) {
|
| 1577 |
av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
|
| 1578 |
return -1; |
| 1579 |
} |
| 1580 |
|
| 1581 |
if (flags & 0x01) frag->base_data_offset = get_be64(pb); |
| 1582 |
else frag->base_data_offset = frag->moof_offset;
|
| 1583 |
if (flags & 0x02) frag->stsd_id = get_be32(pb); |
| 1584 |
else frag->stsd_id = trex->stsd_id;
|
| 1585 |
|
| 1586 |
frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
|
| 1587 |
frag->size = flags & 0x10 ? get_be32(pb) : trex->size;
|
| 1588 |
frag->flags = flags & 0x20 ? get_be32(pb) : trex->flags;
|
| 1589 |
dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
|
| 1590 |
return 0; |
| 1591 |
} |
| 1592 |
|
| 1593 |
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 1594 |
{
|
| 1595 |
MOVTrackExt *trex; |
| 1596 |
|
| 1597 |
if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data)) |
| 1598 |
return -1; |
| 1599 |
c->trex_data = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data)); |
| 1600 |
if (!c->trex_data)
|
| 1601 |
return AVERROR(ENOMEM);
|
| 1602 |
trex = &c->trex_data[c->trex_count++]; |
| 1603 |
get_byte(pb); /* version */
|
| 1604 |
get_be24(pb); /* flags */
|
| 1605 |
trex->track_id = get_be32(pb); |
| 1606 |
trex->stsd_id = get_be32(pb); |
| 1607 |
trex->duration = get_be32(pb); |
| 1608 |
trex->size = get_be32(pb); |
| 1609 |
trex->flags = get_be32(pb); |
| 1610 |
return 0; |
| 1611 |
} |
| 1612 |
|
| 1613 |
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 1614 |
{
|
| 1615 |
MOVFragment *frag = &c->fragment; |
| 1616 |
AVStream *st; |
| 1617 |
MOVStreamContext *sc; |
| 1618 |
uint64_t offset; |
| 1619 |
int64_t dts; |
| 1620 |
int data_offset = 0; |
| 1621 |
unsigned entries, first_sample_flags = frag->flags;
|
| 1622 |
int flags, distance, i;
|
| 1623 |
|
| 1624 |
if (!frag->track_id || frag->track_id > c->fc->nb_streams)
|
| 1625 |
return -1; |
| 1626 |
st = c->fc->streams[frag->track_id-1];
|
| 1627 |
sc = st->priv_data; |
| 1628 |
if (sc->pseudo_stream_id+1 != frag->stsd_id) |
| 1629 |
return 0; |
| 1630 |
get_byte(pb); /* version */
|
| 1631 |
flags = get_be24(pb); |
| 1632 |
entries = get_be32(pb); |
| 1633 |
dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
|
| 1634 |
if (flags & 0x001) data_offset = get_be32(pb); |
| 1635 |
if (flags & 0x004) first_sample_flags = get_be32(pb); |
| 1636 |
if (flags & 0x800) { |
| 1637 |
if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data)) |
| 1638 |
return -1; |
| 1639 |
sc->ctts_data = av_realloc(sc->ctts_data, |
| 1640 |
(entries+sc->ctts_count)*sizeof(*sc->ctts_data));
|
| 1641 |
if (!sc->ctts_data)
|
| 1642 |
return AVERROR(ENOMEM);
|
| 1643 |
} |
| 1644 |
dts = st->duration; |
| 1645 |
offset = frag->base_data_offset + data_offset; |
| 1646 |
distance = 0;
|
| 1647 |
dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
|
| 1648 |
for (i = 0; i < entries; i++) { |
| 1649 |
unsigned sample_size = frag->size;
|
| 1650 |
int sample_flags = i ? frag->flags : first_sample_flags;
|
| 1651 |
unsigned sample_duration = frag->duration;
|
| 1652 |
int keyframe;
|
| 1653 |
|
| 1654 |
if (flags & 0x100) sample_duration = get_be32(pb); |
| 1655 |
if (flags & 0x200) sample_size = get_be32(pb); |
| 1656 |
if (flags & 0x400) sample_flags = get_be32(pb); |
| 1657 |
if (flags & 0x800) { |
| 1658 |
sc->ctts_data[sc->ctts_count].count = 1;
|
| 1659 |
sc->ctts_data[sc->ctts_count].duration = get_be32(pb); |
| 1660 |
sc->ctts_count++; |
| 1661 |
} |
| 1662 |
if ((keyframe = st->codec->codec_type == CODEC_TYPE_AUDIO ||
|
| 1663 |
(flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000)) |
| 1664 |
distance = 0;
|
| 1665 |
av_add_index_entry(st, offset, dts, sample_size, distance, |
| 1666 |
keyframe ? AVINDEX_KEYFRAME : 0);
|
| 1667 |
dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", " |
| 1668 |
"size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
|
| 1669 |
offset, dts, sample_size, distance, keyframe); |
| 1670 |
distance++; |
| 1671 |
assert(sample_duration % sc->time_rate == 0);
|
| 1672 |
dts += sample_duration / sc->time_rate; |
| 1673 |
offset += sample_size; |
| 1674 |
} |
| 1675 |
frag->moof_offset = offset; |
| 1676 |
sc->sample_count = st->nb_index_entries; |
| 1677 |
st->duration = dts; |
| 1678 |
return 0; |
| 1679 |
} |
| 1680 |
|
| 1681 |
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
|
| 1682 |
/* like the files created with Adobe Premiere 5.0, for samples see */
|
| 1683 |
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
|
| 1684 |
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 1685 |
{
|
| 1686 |
int err;
|
| 1687 |
|
| 1688 |
if (atom.size < 8) |
| 1689 |
return 0; /* continue */ |
| 1690 |
if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */ |
| 1691 |
url_fskip(pb, atom.size - 4);
|
| 1692 |
return 0; |
| 1693 |
} |
| 1694 |
atom.type = get_le32(pb); |
| 1695 |
atom.offset += 8;
|
| 1696 |
atom.size -= 8;
|
| 1697 |
if (atom.type != MKTAG('m','d','a','t')) { |
| 1698 |
url_fskip(pb, atom.size); |
| 1699 |
return 0; |
| 1700 |
} |
| 1701 |
err = mov_read_mdat(c, pb, atom); |
| 1702 |
return err;
|
| 1703 |
} |
| 1704 |
|
| 1705 |
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 1706 |
{
|
| 1707 |
#if CONFIG_ZLIB
|
| 1708 |
ByteIOContext ctx; |
| 1709 |
uint8_t *cmov_data; |
| 1710 |
uint8_t *moov_data; /* uncompressed data */
|
| 1711 |
long cmov_len, moov_len;
|
| 1712 |
int ret = -1; |
| 1713 |
|
| 1714 |
get_be32(pb); /* dcom atom */
|
| 1715 |
if (get_le32(pb) != MKTAG('d','c','o','m')) |
| 1716 |
return -1; |
| 1717 |
if (get_le32(pb) != MKTAG('z','l','i','b')) { |
| 1718 |
av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !"); |
| 1719 |
return -1; |
| 1720 |
} |
| 1721 |
get_be32(pb); /* cmvd atom */
|
| 1722 |
if (get_le32(pb) != MKTAG('c','m','v','d')) |
| 1723 |
return -1; |
| 1724 |
moov_len = get_be32(pb); /* uncompressed size */
|
| 1725 |
cmov_len = atom.size - 6 * 4; |
| 1726 |
|
| 1727 |
cmov_data = av_malloc(cmov_len); |
| 1728 |
if (!cmov_data)
|
| 1729 |
return -1; |
| 1730 |
moov_data = av_malloc(moov_len); |
| 1731 |
if (!moov_data) {
|
| 1732 |
av_free(cmov_data); |
| 1733 |
return -1; |
| 1734 |
} |
| 1735 |
get_buffer(pb, cmov_data, cmov_len); |
| 1736 |
if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK) |
| 1737 |
goto free_and_return;
|
| 1738 |
if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0) |
| 1739 |
goto free_and_return;
|
| 1740 |
atom.type = MKTAG('m','o','o','v'); |
| 1741 |
atom.offset = 0;
|
| 1742 |
atom.size = moov_len; |
| 1743 |
#ifdef DEBUG
|
| 1744 |
// { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
|
| 1745 |
#endif
|
| 1746 |
ret = mov_read_default(c, &ctx, atom); |
| 1747 |
free_and_return:
|
| 1748 |
av_free(moov_data); |
| 1749 |
av_free(cmov_data); |
| 1750 |
return ret;
|
| 1751 |
#else
|
| 1752 |
av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
|
| 1753 |
return -1; |
| 1754 |
#endif
|
| 1755 |
} |
| 1756 |
|
| 1757 |
/* edit list atom */
|
| 1758 |
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom) |
| 1759 |
{
|
| 1760 |
MOVStreamContext *sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
|
| 1761 |
int i, edit_count;
|
| 1762 |
|
| 1763 |
get_byte(pb); /* version */
|
| 1764 |
get_be24(pb); /* flags */
|
| 1765 |
edit_count= sc->edit_count = get_be32(pb); /* entries */
|
| 1766 |
|
| 1767 |
for(i=0; i<edit_count; i++){ |
| 1768 |
int time;
|
| 1769 |
get_be32(pb); /* Track duration */
|
| 1770 |
time = get_be32(pb); /* Media time */
|
| 1771 |
get_be32(pb); /* Media rate */
|
| 1772 |
if (i == 0 && time != -1) |
| 1773 |
sc->time_offset = time; |
| 1774 |
} |
| 1775 |
|
| 1776 |
if(edit_count > 1) |
| 1777 |
av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
|
| 1778 |
"a/v desync might occur, patch welcome\n");
|
| 1779 |
|
| 1780 |
dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, sc->edit_count); |
| 1781 |
return 0; |
| 1782 |
} |
| 1783 |
|
| 1784 |
static const MOVParseTableEntry mov_default_parse_table[] = { |
| 1785 |
{ MKTAG('a','v','s','s'), mov_read_extradata },
|
| 1786 |
{ MKTAG('c','o','6','4'), mov_read_stco },
|
| 1787 |
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
|
| 1788 |
{ MKTAG('d','i','n','f'), mov_read_default },
|
| 1789 |
{ MKTAG('d','r','e','f'), mov_read_dref },
|
| 1790 |
{ MKTAG('e','d','t','s'), mov_read_default },
|
| 1791 |
{ MKTAG('e','l','s','t'), mov_read_elst },
|
| 1792 |
{ MKTAG('e','n','d','a'), mov_read_enda },
|
| 1793 |
{ MKTAG('f','i','e','l'), mov_read_extradata },
|
| 1794 |
{ MKTAG('f','t','y','p'), mov_read_ftyp },
|
| 1795 |
{ MKTAG('g','l','b','l'), mov_read_glbl },
|
| 1796 |
{ MKTAG('h','d','l','r'), mov_read_hdlr },
|
| 1797 |
{ MKTAG('i','l','s','t'), mov_read_ilst },
|
| 1798 |
{ MKTAG('j','p','2','h'), mov_read_extradata },
|
| 1799 |
{ MKTAG('m','d','a','t'), mov_read_mdat },
|
| 1800 |
{ MKTAG('m','d','h','d'), mov_read_mdhd },
|
| 1801 |
{ MKTAG('m','d','i','a'), mov_read_default },
|
| 1802 |
{ MKTAG('m','e','t','a'), mov_read_meta },
|
| 1803 |
{ MKTAG('m','i','n','f'), mov_read_default },
|
| 1804 |
{ MKTAG('m','o','o','f'), mov_read_moof },
|
| 1805 |
{ MKTAG('m','o','o','v'), mov_read_moov },
|
| 1806 |
{ MKTAG('m','v','e','x'), mov_read_default },
|
| 1807 |
{ MKTAG('m','v','h','d'), mov_read_mvhd },
|
| 1808 |
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
|
| 1809 |
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
|
| 1810 |
{ MKTAG('a','v','c','C'), mov_read_glbl },
|
| 1811 |
{ MKTAG('p','a','s','p'), mov_read_pasp },
|
| 1812 |
{ MKTAG('s','t','b','l'), mov_read_default },
|
| 1813 |
{ MKTAG('s','t','c','o'), mov_read_stco },
|
| 1814 |
{ MKTAG('s','t','s','c'), mov_read_stsc },
|
| 1815 |
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
|
| 1816 |
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
|
| 1817 |
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
|
| 1818 |
{ MKTAG('s','t','t','s'), mov_read_stts },
|
| 1819 |
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
|
| 1820 |
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
|
| 1821 |
{ MKTAG('t','r','a','k'), mov_read_trak },
|
| 1822 |
{ MKTAG('t','r','a','f'), mov_read_default },
|
| 1823 |
{ MKTAG('t','r','e','x'), mov_read_trex },
|
| 1824 |
{ MKTAG('t','r','k','n'), mov_read_trkn },
|
| 1825 |
{ MKTAG('t','r','u','n'), mov_read_trun },
|
| 1826 |
{ MKTAG('u','d','t','a'), mov_read_default },
|
| 1827 |
{ MKTAG('w','a','v','e'), mov_read_wave },
|
| 1828 |
{ MKTAG('e','s','d','s'), mov_read_esds },
|
| 1829 |
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
|
| 1830 |
{ MKTAG('c','m','o','v'), mov_read_cmov },
|
| 1831 |
{ MKTAG(0xa9,'n','a','m'), mov_read_udta_string },
|
| 1832 |
{ MKTAG(0xa9,'w','r','t'), mov_read_udta_string },
|
| 1833 |
{ MKTAG(0xa9,'c','p','y'), mov_read_udta_string },
|
| 1834 |
{ MKTAG(0xa9,'i','n','f'), mov_read_udta_string },
|
| 1835 |
{ MKTAG(0xa9,'i','n','f'), mov_read_udta_string },
|
| 1836 |
{ MKTAG(0xa9,'A','R','T'), mov_read_udta_string },
|
| 1837 |
{ MKTAG(0xa9,'a','l','b'), mov_read_udta_string },
|
| 1838 |
{ MKTAG(0xa9,'c','m','t'), mov_read_udta_string },
|
| 1839 |
{ 0, NULL }
|
| 1840 |
}; |
| 1841 |
|
| 1842 |
static int mov_probe(AVProbeData *p) |
| 1843 |
{
|
| 1844 |
unsigned int offset; |
| 1845 |
uint32_t tag; |
| 1846 |
int score = 0; |
| 1847 |
|
| 1848 |
/* check file header */
|
| 1849 |
offset = 0;
|
| 1850 |
for(;;) {
|
| 1851 |
/* ignore invalid offset */
|
| 1852 |
if ((offset + 8) > (unsigned int)p->buf_size) |
| 1853 |
return score;
|
| 1854 |
tag = AV_RL32(p->buf + offset + 4);
|
| 1855 |
switch(tag) {
|
| 1856 |
/* check for obvious tags */
|
| 1857 |
case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */ |
| 1858 |
case MKTAG('m','o','o','v'): |
| 1859 |
case MKTAG('m','d','a','t'): |
| 1860 |
case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */ |
| 1861 |
case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */ |
| 1862 |
case MKTAG('f','t','y','p'): |
| 1863 |
return AVPROBE_SCORE_MAX;
|
| 1864 |
/* those are more common words, so rate then a bit less */
|
| 1865 |
case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */ |
| 1866 |
case MKTAG('w','i','d','e'): |
| 1867 |
case MKTAG('f','r','e','e'): |
| 1868 |
case MKTAG('j','u','n','k'): |
| 1869 |
case MKTAG('p','i','c','t'): |
| 1870 |
return AVPROBE_SCORE_MAX - 5; |
| 1871 |
case MKTAG(0x82,0x82,0x7f,0x7d): |
| 1872 |
case MKTAG('s','k','i','p'): |
| 1873 |
case MKTAG('u','u','i','d'): |
| 1874 |
case MKTAG('p','r','f','l'): |
| 1875 |
offset = AV_RB32(p->buf+offset) + offset; |
| 1876 |
/* if we only find those cause probedata is too small at least rate them */
|
| 1877 |
score = AVPROBE_SCORE_MAX - 50;
|
| 1878 |
break;
|
| 1879 |
default:
|
| 1880 |
/* unrecognized tag */
|
| 1881 |
return score;
|
| 1882 |
} |
| 1883 |
} |
| 1884 |
return score;
|
| 1885 |
} |
| 1886 |
|
| 1887 |
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap) |
| 1888 |
{
|
| 1889 |
MOVContext *mov = s->priv_data; |
| 1890 |
ByteIOContext *pb = s->pb; |
| 1891 |
int err;
|
| 1892 |
MOVAtom atom = { 0, 0, 0 };
|
| 1893 |
|
| 1894 |
mov->fc = s; |
| 1895 |
/* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
|
| 1896 |
if(!url_is_streamed(pb))
|
| 1897 |
atom.size = url_fsize(pb); |
| 1898 |
else
|
| 1899 |
atom.size = INT64_MAX; |
| 1900 |
|
| 1901 |
/* check MOV header */
|
| 1902 |
if ((err = mov_read_default(mov, pb, atom)) < 0) { |
| 1903 |
av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
|
| 1904 |
return err;
|
| 1905 |
} |
| 1906 |
if (!mov->found_moov) {
|
| 1907 |
av_log(s, AV_LOG_ERROR, "moov atom not found\n");
|
| 1908 |
return -1; |
| 1909 |
} |
| 1910 |
dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
|
| 1911 |
|
| 1912 |
return 0; |
| 1913 |
} |
| 1914 |
|
| 1915 |
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt) |
| 1916 |
{
|
| 1917 |
MOVContext *mov = s->priv_data; |
| 1918 |
MOVStreamContext *sc = 0;
|
| 1919 |
AVIndexEntry *sample = 0;
|
| 1920 |
int64_t best_dts = INT64_MAX; |
| 1921 |
int i;
|
| 1922 |
retry:
|
| 1923 |
for (i = 0; i < s->nb_streams; i++) { |
| 1924 |
AVStream *st = s->streams[i]; |
| 1925 |
MOVStreamContext *msc = st->priv_data; |
| 1926 |
if (st->discard != AVDISCARD_ALL && msc->pb && msc->current_sample < msc->sample_count) {
|
| 1927 |
AVIndexEntry *current_sample = &st->index_entries[msc->current_sample]; |
| 1928 |
int64_t dts = av_rescale(current_sample->timestamp * (int64_t)msc->time_rate, |
| 1929 |
AV_TIME_BASE, msc->time_scale); |
| 1930 |
dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts); |
| 1931 |
if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
|
| 1932 |
(!url_is_streamed(s->pb) && |
| 1933 |
((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb && |
| 1934 |
((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) || |
| 1935 |
(FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
|
| 1936 |
sample = current_sample; |
| 1937 |
best_dts = dts; |
| 1938 |
sc = msc; |
| 1939 |
} |
| 1940 |
} |
| 1941 |
} |
| 1942 |
if (!sample) {
|
| 1943 |
mov->found_mdat = 0;
|
| 1944 |
if (!url_is_streamed(s->pb) ||
|
| 1945 |
mov_read_default(mov, s->pb, (MOVAtom){ 0, 0, INT64_MAX }) < 0 ||
|
| 1946 |
url_feof(s->pb)) |
| 1947 |
return -1; |
| 1948 |
dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
|
| 1949 |
goto retry;
|
| 1950 |
} |
| 1951 |
/* must be done just before reading, to avoid infinite loop on sample */
|
| 1952 |
sc->current_sample++; |
| 1953 |
if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
|
| 1954 |
av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n", |
| 1955 |
sc->ffindex, sample->pos); |
| 1956 |
return -1; |
| 1957 |
} |
| 1958 |
av_get_packet(sc->pb, pkt, sample->size); |
| 1959 |
#if CONFIG_DV_DEMUXER
|
| 1960 |
if (mov->dv_demux && sc->dv_audio_container) {
|
| 1961 |
dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size); |
| 1962 |
av_free(pkt->data); |
| 1963 |
pkt->size = 0;
|
| 1964 |
if (dv_get_packet(mov->dv_demux, pkt) < 0) |
| 1965 |
return -1; |
| 1966 |
} |
| 1967 |
#endif
|
| 1968 |
pkt->stream_index = sc->ffindex; |
| 1969 |
pkt->dts = sample->timestamp; |
| 1970 |
if (sc->ctts_data) {
|
| 1971 |
assert(sc->ctts_data[sc->sample_to_ctime_index].duration % sc->time_rate == 0);
|
| 1972 |
pkt->pts = pkt->dts + sc->ctts_data[sc->sample_to_ctime_index].duration / sc->time_rate; |
| 1973 |
/* update ctts context */
|
| 1974 |
sc->sample_to_ctime_sample++; |
| 1975 |
if (sc->sample_to_ctime_index < sc->ctts_count &&
|
| 1976 |
sc->ctts_data[sc->sample_to_ctime_index].count == sc->sample_to_ctime_sample) {
|
| 1977 |
sc->sample_to_ctime_index++; |
| 1978 |
sc->sample_to_ctime_sample = 0;
|
| 1979 |
} |
| 1980 |
if (sc->wrong_dts)
|
| 1981 |
pkt->dts = AV_NOPTS_VALUE; |
| 1982 |
} else {
|
| 1983 |
AVStream *st = s->streams[sc->ffindex]; |
| 1984 |
int64_t next_dts = (sc->current_sample < sc->sample_count) ? |
| 1985 |
st->index_entries[sc->current_sample].timestamp : st->duration; |
| 1986 |
pkt->duration = next_dts - pkt->dts; |
| 1987 |
pkt->pts = pkt->dts; |
| 1988 |
} |
| 1989 |
pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
|
| 1990 |
pkt->pos = sample->pos; |
| 1991 |
dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n", |
| 1992 |
pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration); |
| 1993 |
return 0; |
| 1994 |
} |
| 1995 |
|
| 1996 |
static int mov_seek_stream(AVStream *st, int64_t timestamp, int flags) |
| 1997 |
{
|
| 1998 |
MOVStreamContext *sc = st->priv_data; |
| 1999 |
int sample, time_sample;
|
| 2000 |
int i;
|
| 2001 |
|
| 2002 |
sample = av_index_search_timestamp(st, timestamp, flags); |
| 2003 |
dprintf(st->codec, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample); |
| 2004 |
if (sample < 0) /* not sure what to do */ |
| 2005 |
return -1; |
| 2006 |
sc->current_sample = sample; |
| 2007 |
dprintf(st->codec, "stream %d, found sample %d\n", st->index, sc->current_sample);
|
| 2008 |
/* adjust ctts index */
|
| 2009 |
if (sc->ctts_data) {
|
| 2010 |
time_sample = 0;
|
| 2011 |
for (i = 0; i < sc->ctts_count; i++) { |
| 2012 |
int next = time_sample + sc->ctts_data[i].count;
|
| 2013 |
if (next > sc->current_sample) {
|
| 2014 |
sc->sample_to_ctime_index = i; |
| 2015 |
sc->sample_to_ctime_sample = sc->current_sample - time_sample; |
| 2016 |
break;
|
| 2017 |
} |
| 2018 |
time_sample = next; |
| 2019 |
} |
| 2020 |
} |
| 2021 |
return sample;
|
| 2022 |
} |
| 2023 |
|
| 2024 |
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags) |
| 2025 |
{
|
| 2026 |
AVStream *st; |
| 2027 |
int64_t seek_timestamp, timestamp; |
| 2028 |
int sample;
|
| 2029 |
int i;
|
| 2030 |
|
| 2031 |
if (stream_index >= s->nb_streams)
|
| 2032 |
return -1; |
| 2033 |
if (sample_time < 0) |
| 2034 |
sample_time = 0;
|
| 2035 |
|
| 2036 |
st = s->streams[stream_index]; |
| 2037 |
sample = mov_seek_stream(st, sample_time, flags); |
| 2038 |
if (sample < 0) |
| 2039 |
return -1; |
| 2040 |
|
| 2041 |
/* adjust seek timestamp to found sample timestamp */
|
| 2042 |
seek_timestamp = st->index_entries[sample].timestamp; |
| 2043 |
|
| 2044 |
for (i = 0; i < s->nb_streams; i++) { |
| 2045 |
st = s->streams[i]; |
| 2046 |
if (stream_index == i || st->discard == AVDISCARD_ALL)
|
| 2047 |
continue;
|
| 2048 |
|
| 2049 |
timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base); |
| 2050 |
mov_seek_stream(st, timestamp, flags); |
| 2051 |
} |
| 2052 |
return 0; |
| 2053 |
} |
| 2054 |
|
| 2055 |
static int mov_read_close(AVFormatContext *s) |
| 2056 |
{
|
| 2057 |
int i, j;
|
| 2058 |
MOVContext *mov = s->priv_data; |
| 2059 |
for(i=0; i<s->nb_streams; i++) { |
| 2060 |
MOVStreamContext *sc = s->streams[i]->priv_data; |
| 2061 |
av_freep(&sc->ctts_data); |
| 2062 |
for (j=0; j<sc->drefs_count; j++) |
| 2063 |
av_freep(&sc->drefs[j].path); |
| 2064 |
av_freep(&sc->drefs); |
| 2065 |
if (sc->pb && sc->pb != s->pb)
|
| 2066 |
url_fclose(sc->pb); |
| 2067 |
} |
| 2068 |
if(mov->dv_demux){
|
| 2069 |
for(i=0; i<mov->dv_fctx->nb_streams; i++){ |
| 2070 |
av_freep(&mov->dv_fctx->streams[i]->codec); |
| 2071 |
av_freep(&mov->dv_fctx->streams[i]); |
| 2072 |
} |
| 2073 |
av_freep(&mov->dv_fctx); |
| 2074 |
av_freep(&mov->dv_demux); |
| 2075 |
} |
| 2076 |
av_freep(&mov->trex_data); |
| 2077 |
return 0; |
| 2078 |
} |
| 2079 |
|
| 2080 |
AVInputFormat mov_demuxer = {
|
| 2081 |
"mov,mp4,m4a,3gp,3g2,mj2",
|
| 2082 |
NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
|
| 2083 |
sizeof(MOVContext),
|
| 2084 |
mov_probe, |
| 2085 |
mov_read_header, |
| 2086 |
mov_read_packet, |
| 2087 |
mov_read_close, |
| 2088 |
mov_read_seek, |
| 2089 |
}; |