1895 lines
68 KiB
C
1895 lines
68 KiB
C
/*
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* Matroska file demuxer
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* Copyright (c) 2003-2008 The FFmpeg Project
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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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/**
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* @file
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* Matroska file demuxer
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* by Ronald Bultje <rbultje@ronald.bitfreak.net>
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* with a little help from Moritz Bunkus <moritz@bunkus.org>
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* totally reworked by Aurelien Jacobs <aurel@gnuage.org>
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* Specs available on the Matroska project page: http://www.matroska.org/.
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*/
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#include <stdio.h>
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#include "avformat.h"
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#include "internal.h"
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/* For ff_codec_get_id(). */
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#include "riff.h"
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#include "isom.h"
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#include "rm.h"
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#include "matroska.h"
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#include "libavcodec/mpeg4audio.h"
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#include "libavutil/intfloat_readwrite.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/avstring.h"
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#include "libavutil/lzo.h"
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#if CONFIG_ZLIB
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#include <zlib.h>
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#endif
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#if CONFIG_BZLIB
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#include <bzlib.h>
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#endif
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typedef enum {
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EBML_NONE,
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EBML_UINT,
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EBML_FLOAT,
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EBML_STR,
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EBML_UTF8,
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EBML_BIN,
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EBML_NEST,
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EBML_PASS,
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EBML_STOP,
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} EbmlType;
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typedef const struct EbmlSyntax {
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uint32_t id;
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EbmlType type;
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int list_elem_size;
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int data_offset;
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union {
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uint64_t u;
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double f;
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const char *s;
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const struct EbmlSyntax *n;
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} def;
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} EbmlSyntax;
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typedef struct {
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int nb_elem;
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void *elem;
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} EbmlList;
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typedef struct {
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int size;
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uint8_t *data;
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int64_t pos;
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} EbmlBin;
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typedef struct {
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uint64_t version;
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uint64_t max_size;
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uint64_t id_length;
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char *doctype;
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uint64_t doctype_version;
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} Ebml;
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typedef struct {
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uint64_t algo;
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EbmlBin settings;
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} MatroskaTrackCompression;
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typedef struct {
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uint64_t scope;
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uint64_t type;
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MatroskaTrackCompression compression;
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} MatroskaTrackEncoding;
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typedef struct {
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double frame_rate;
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uint64_t display_width;
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uint64_t display_height;
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uint64_t pixel_width;
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uint64_t pixel_height;
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uint64_t fourcc;
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} MatroskaTrackVideo;
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typedef struct {
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double samplerate;
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double out_samplerate;
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uint64_t bitdepth;
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uint64_t channels;
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/* real audio header (extracted from extradata) */
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int coded_framesize;
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int sub_packet_h;
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int frame_size;
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int sub_packet_size;
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int sub_packet_cnt;
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int pkt_cnt;
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uint8_t *buf;
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} MatroskaTrackAudio;
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typedef struct {
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uint64_t num;
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uint64_t uid;
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uint64_t type;
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char *name;
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char *codec_id;
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EbmlBin codec_priv;
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char *language;
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double time_scale;
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uint64_t default_duration;
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uint64_t flag_default;
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MatroskaTrackVideo video;
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MatroskaTrackAudio audio;
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EbmlList encodings;
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AVStream *stream;
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int64_t end_timecode;
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int ms_compat;
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} MatroskaTrack;
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typedef struct {
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uint64_t uid;
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char *filename;
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char *mime;
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EbmlBin bin;
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AVStream *stream;
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} MatroskaAttachement;
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typedef struct {
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uint64_t start;
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uint64_t end;
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uint64_t uid;
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char *title;
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AVChapter *chapter;
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} MatroskaChapter;
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typedef struct {
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uint64_t track;
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uint64_t pos;
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} MatroskaIndexPos;
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typedef struct {
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uint64_t time;
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EbmlList pos;
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} MatroskaIndex;
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typedef struct {
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char *name;
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char *string;
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char *lang;
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uint64_t def;
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EbmlList sub;
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} MatroskaTag;
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typedef struct {
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char *type;
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uint64_t typevalue;
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uint64_t trackuid;
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uint64_t chapteruid;
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uint64_t attachuid;
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} MatroskaTagTarget;
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typedef struct {
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MatroskaTagTarget target;
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EbmlList tag;
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} MatroskaTags;
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typedef struct {
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uint64_t id;
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uint64_t pos;
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} MatroskaSeekhead;
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typedef struct {
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uint64_t start;
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uint64_t length;
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} MatroskaLevel;
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typedef struct {
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AVFormatContext *ctx;
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/* EBML stuff */
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int num_levels;
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MatroskaLevel levels[EBML_MAX_DEPTH];
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int level_up;
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uint64_t time_scale;
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double duration;
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char *title;
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EbmlList tracks;
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EbmlList attachments;
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EbmlList chapters;
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EbmlList index;
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EbmlList tags;
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EbmlList seekhead;
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/* byte position of the segment inside the stream */
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int64_t segment_start;
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/* the packet queue */
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AVPacket **packets;
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int num_packets;
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AVPacket *prev_pkt;
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int done;
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int has_cluster_id;
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/* What to skip before effectively reading a packet. */
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int skip_to_keyframe;
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uint64_t skip_to_timecode;
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} MatroskaDemuxContext;
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typedef struct {
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uint64_t duration;
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int64_t reference;
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uint64_t non_simple;
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EbmlBin bin;
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} MatroskaBlock;
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typedef struct {
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uint64_t timecode;
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EbmlList blocks;
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} MatroskaCluster;
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static EbmlSyntax ebml_header[] = {
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{ EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml,version), {.u=EBML_VERSION} },
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{ EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml,max_size), {.u=8} },
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{ EBML_ID_EBMLMAXIDLENGTH, EBML_UINT, 0, offsetof(Ebml,id_length), {.u=4} },
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{ EBML_ID_DOCTYPE, EBML_STR, 0, offsetof(Ebml,doctype), {.s="(none)"} },
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{ EBML_ID_DOCTYPEREADVERSION, EBML_UINT, 0, offsetof(Ebml,doctype_version), {.u=1} },
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{ EBML_ID_EBMLVERSION, EBML_NONE },
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{ EBML_ID_DOCTYPEVERSION, EBML_NONE },
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{ 0 }
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};
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static EbmlSyntax ebml_syntax[] = {
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{ EBML_ID_HEADER, EBML_NEST, 0, 0, {.n=ebml_header} },
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{ 0 }
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};
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static EbmlSyntax matroska_info[] = {
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{ MATROSKA_ID_TIMECODESCALE, EBML_UINT, 0, offsetof(MatroskaDemuxContext,time_scale), {.u=1000000} },
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{ MATROSKA_ID_DURATION, EBML_FLOAT, 0, offsetof(MatroskaDemuxContext,duration) },
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{ MATROSKA_ID_TITLE, EBML_UTF8, 0, offsetof(MatroskaDemuxContext,title) },
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{ MATROSKA_ID_WRITINGAPP, EBML_NONE },
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{ MATROSKA_ID_MUXINGAPP, EBML_NONE },
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{ MATROSKA_ID_DATEUTC, EBML_NONE },
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{ MATROSKA_ID_SEGMENTUID, EBML_NONE },
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{ 0 }
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};
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static EbmlSyntax matroska_track_video[] = {
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{ MATROSKA_ID_VIDEOFRAMERATE, EBML_FLOAT,0, offsetof(MatroskaTrackVideo,frame_rate) },
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{ MATROSKA_ID_VIDEODISPLAYWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_width) },
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{ MATROSKA_ID_VIDEODISPLAYHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,display_height) },
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{ MATROSKA_ID_VIDEOPIXELWIDTH, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_width) },
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{ MATROSKA_ID_VIDEOPIXELHEIGHT, EBML_UINT, 0, offsetof(MatroskaTrackVideo,pixel_height) },
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{ MATROSKA_ID_VIDEOCOLORSPACE, EBML_UINT, 0, offsetof(MatroskaTrackVideo,fourcc) },
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{ MATROSKA_ID_VIDEOPIXELCROPB, EBML_NONE },
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{ MATROSKA_ID_VIDEOPIXELCROPT, EBML_NONE },
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{ MATROSKA_ID_VIDEOPIXELCROPL, EBML_NONE },
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{ MATROSKA_ID_VIDEOPIXELCROPR, EBML_NONE },
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{ MATROSKA_ID_VIDEODISPLAYUNIT, EBML_NONE },
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{ MATROSKA_ID_VIDEOFLAGINTERLACED,EBML_NONE },
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{ MATROSKA_ID_VIDEOSTEREOMODE, EBML_NONE },
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{ MATROSKA_ID_VIDEOASPECTRATIO, EBML_NONE },
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{ 0 }
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};
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static EbmlSyntax matroska_track_audio[] = {
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{ MATROSKA_ID_AUDIOSAMPLINGFREQ, EBML_FLOAT,0, offsetof(MatroskaTrackAudio,samplerate), {.f=8000.0} },
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{ MATROSKA_ID_AUDIOOUTSAMPLINGFREQ,EBML_FLOAT,0,offsetof(MatroskaTrackAudio,out_samplerate) },
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{ MATROSKA_ID_AUDIOBITDEPTH, EBML_UINT, 0, offsetof(MatroskaTrackAudio,bitdepth) },
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{ MATROSKA_ID_AUDIOCHANNELS, EBML_UINT, 0, offsetof(MatroskaTrackAudio,channels), {.u=1} },
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{ 0 }
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};
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static EbmlSyntax matroska_track_encoding_compression[] = {
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{ MATROSKA_ID_ENCODINGCOMPALGO, EBML_UINT, 0, offsetof(MatroskaTrackCompression,algo), {.u=0} },
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{ MATROSKA_ID_ENCODINGCOMPSETTINGS,EBML_BIN, 0, offsetof(MatroskaTrackCompression,settings) },
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{ 0 }
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};
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static EbmlSyntax matroska_track_encoding[] = {
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{ MATROSKA_ID_ENCODINGSCOPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,scope), {.u=1} },
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{ MATROSKA_ID_ENCODINGTYPE, EBML_UINT, 0, offsetof(MatroskaTrackEncoding,type), {.u=0} },
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{ MATROSKA_ID_ENCODINGCOMPRESSION,EBML_NEST, 0, offsetof(MatroskaTrackEncoding,compression), {.n=matroska_track_encoding_compression} },
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{ MATROSKA_ID_ENCODINGORDER, EBML_NONE },
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{ 0 }
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};
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static EbmlSyntax matroska_track_encodings[] = {
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{ MATROSKA_ID_TRACKCONTENTENCODING, EBML_NEST, sizeof(MatroskaTrackEncoding), offsetof(MatroskaTrack,encodings), {.n=matroska_track_encoding} },
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{ 0 }
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};
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static EbmlSyntax matroska_track[] = {
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{ MATROSKA_ID_TRACKNUMBER, EBML_UINT, 0, offsetof(MatroskaTrack,num) },
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{ MATROSKA_ID_TRACKNAME, EBML_UTF8, 0, offsetof(MatroskaTrack,name) },
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{ MATROSKA_ID_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTrack,uid) },
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{ MATROSKA_ID_TRACKTYPE, EBML_UINT, 0, offsetof(MatroskaTrack,type) },
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{ MATROSKA_ID_CODECID, EBML_STR, 0, offsetof(MatroskaTrack,codec_id) },
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{ MATROSKA_ID_CODECPRIVATE, EBML_BIN, 0, offsetof(MatroskaTrack,codec_priv) },
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{ MATROSKA_ID_TRACKLANGUAGE, EBML_UTF8, 0, offsetof(MatroskaTrack,language), {.s="eng"} },
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{ MATROSKA_ID_TRACKDEFAULTDURATION, EBML_UINT, 0, offsetof(MatroskaTrack,default_duration) },
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{ MATROSKA_ID_TRACKTIMECODESCALE, EBML_FLOAT,0, offsetof(MatroskaTrack,time_scale), {.f=1.0} },
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{ MATROSKA_ID_TRACKFLAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTrack,flag_default), {.u=1} },
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{ MATROSKA_ID_TRACKVIDEO, EBML_NEST, 0, offsetof(MatroskaTrack,video), {.n=matroska_track_video} },
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{ MATROSKA_ID_TRACKAUDIO, EBML_NEST, 0, offsetof(MatroskaTrack,audio), {.n=matroska_track_audio} },
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{ MATROSKA_ID_TRACKCONTENTENCODINGS,EBML_NEST, 0, 0, {.n=matroska_track_encodings} },
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{ MATROSKA_ID_TRACKFLAGENABLED, EBML_NONE },
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{ MATROSKA_ID_TRACKFLAGFORCED, EBML_NONE },
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{ MATROSKA_ID_TRACKFLAGLACING, EBML_NONE },
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{ MATROSKA_ID_CODECNAME, EBML_NONE },
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{ MATROSKA_ID_CODECDECODEALL, EBML_NONE },
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{ MATROSKA_ID_CODECINFOURL, EBML_NONE },
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{ MATROSKA_ID_CODECDOWNLOADURL, EBML_NONE },
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{ MATROSKA_ID_TRACKMINCACHE, EBML_NONE },
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{ MATROSKA_ID_TRACKMAXCACHE, EBML_NONE },
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{ MATROSKA_ID_TRACKMAXBLKADDID, EBML_NONE },
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{ 0 }
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};
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static EbmlSyntax matroska_tracks[] = {
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{ MATROSKA_ID_TRACKENTRY, EBML_NEST, sizeof(MatroskaTrack), offsetof(MatroskaDemuxContext,tracks), {.n=matroska_track} },
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{ 0 }
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};
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static EbmlSyntax matroska_attachment[] = {
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{ MATROSKA_ID_FILEUID, EBML_UINT, 0, offsetof(MatroskaAttachement,uid) },
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{ MATROSKA_ID_FILENAME, EBML_UTF8, 0, offsetof(MatroskaAttachement,filename) },
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{ MATROSKA_ID_FILEMIMETYPE, EBML_STR, 0, offsetof(MatroskaAttachement,mime) },
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{ MATROSKA_ID_FILEDATA, EBML_BIN, 0, offsetof(MatroskaAttachement,bin) },
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{ MATROSKA_ID_FILEDESC, EBML_NONE },
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{ 0 }
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};
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static EbmlSyntax matroska_attachments[] = {
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{ MATROSKA_ID_ATTACHEDFILE, EBML_NEST, sizeof(MatroskaAttachement), offsetof(MatroskaDemuxContext,attachments), {.n=matroska_attachment} },
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{ 0 }
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};
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static EbmlSyntax matroska_chapter_display[] = {
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{ MATROSKA_ID_CHAPSTRING, EBML_UTF8, 0, offsetof(MatroskaChapter,title) },
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{ MATROSKA_ID_CHAPLANG, EBML_NONE },
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{ 0 }
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};
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static EbmlSyntax matroska_chapter_entry[] = {
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{ MATROSKA_ID_CHAPTERTIMESTART, EBML_UINT, 0, offsetof(MatroskaChapter,start), {.u=AV_NOPTS_VALUE} },
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{ MATROSKA_ID_CHAPTERTIMEEND, EBML_UINT, 0, offsetof(MatroskaChapter,end), {.u=AV_NOPTS_VALUE} },
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{ MATROSKA_ID_CHAPTERUID, EBML_UINT, 0, offsetof(MatroskaChapter,uid) },
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{ MATROSKA_ID_CHAPTERDISPLAY, EBML_NEST, 0, 0, {.n=matroska_chapter_display} },
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{ MATROSKA_ID_CHAPTERFLAGHIDDEN, EBML_NONE },
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{ MATROSKA_ID_CHAPTERFLAGENABLED, EBML_NONE },
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{ MATROSKA_ID_CHAPTERPHYSEQUIV, EBML_NONE },
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{ MATROSKA_ID_CHAPTERATOM, EBML_NONE },
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{ 0 }
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};
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static EbmlSyntax matroska_chapter[] = {
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{ MATROSKA_ID_CHAPTERATOM, EBML_NEST, sizeof(MatroskaChapter), offsetof(MatroskaDemuxContext,chapters), {.n=matroska_chapter_entry} },
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{ MATROSKA_ID_EDITIONUID, EBML_NONE },
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{ MATROSKA_ID_EDITIONFLAGHIDDEN, EBML_NONE },
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{ MATROSKA_ID_EDITIONFLAGDEFAULT, EBML_NONE },
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{ MATROSKA_ID_EDITIONFLAGORDERED, EBML_NONE },
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{ 0 }
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};
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static EbmlSyntax matroska_chapters[] = {
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{ MATROSKA_ID_EDITIONENTRY, EBML_NEST, 0, 0, {.n=matroska_chapter} },
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{ 0 }
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};
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static EbmlSyntax matroska_index_pos[] = {
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{ MATROSKA_ID_CUETRACK, EBML_UINT, 0, offsetof(MatroskaIndexPos,track) },
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{ MATROSKA_ID_CUECLUSTERPOSITION, EBML_UINT, 0, offsetof(MatroskaIndexPos,pos) },
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{ MATROSKA_ID_CUEBLOCKNUMBER, EBML_NONE },
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{ 0 }
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};
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static EbmlSyntax matroska_index_entry[] = {
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{ MATROSKA_ID_CUETIME, EBML_UINT, 0, offsetof(MatroskaIndex,time) },
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{ MATROSKA_ID_CUETRACKPOSITION, EBML_NEST, sizeof(MatroskaIndexPos), offsetof(MatroskaIndex,pos), {.n=matroska_index_pos} },
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{ 0 }
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};
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static EbmlSyntax matroska_index[] = {
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{ MATROSKA_ID_POINTENTRY, EBML_NEST, sizeof(MatroskaIndex), offsetof(MatroskaDemuxContext,index), {.n=matroska_index_entry} },
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{ 0 }
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};
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static EbmlSyntax matroska_simpletag[] = {
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{ MATROSKA_ID_TAGNAME, EBML_UTF8, 0, offsetof(MatroskaTag,name) },
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{ MATROSKA_ID_TAGSTRING, EBML_UTF8, 0, offsetof(MatroskaTag,string) },
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{ MATROSKA_ID_TAGLANG, EBML_STR, 0, offsetof(MatroskaTag,lang), {.s="und"} },
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{ MATROSKA_ID_TAGDEFAULT, EBML_UINT, 0, offsetof(MatroskaTag,def) },
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{ MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTag,sub), {.n=matroska_simpletag} },
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{ 0 }
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};
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static EbmlSyntax matroska_tagtargets[] = {
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{ MATROSKA_ID_TAGTARGETS_TYPE, EBML_STR, 0, offsetof(MatroskaTagTarget,type) },
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{ MATROSKA_ID_TAGTARGETS_TYPEVALUE, EBML_UINT, 0, offsetof(MatroskaTagTarget,typevalue), {.u=50} },
|
|
{ MATROSKA_ID_TAGTARGETS_TRACKUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,trackuid) },
|
|
{ MATROSKA_ID_TAGTARGETS_CHAPTERUID,EBML_UINT, 0, offsetof(MatroskaTagTarget,chapteruid) },
|
|
{ MATROSKA_ID_TAGTARGETS_ATTACHUID, EBML_UINT, 0, offsetof(MatroskaTagTarget,attachuid) },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_tag[] = {
|
|
{ MATROSKA_ID_SIMPLETAG, EBML_NEST, sizeof(MatroskaTag), offsetof(MatroskaTags,tag), {.n=matroska_simpletag} },
|
|
{ MATROSKA_ID_TAGTARGETS, EBML_NEST, 0, offsetof(MatroskaTags,target), {.n=matroska_tagtargets} },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_tags[] = {
|
|
{ MATROSKA_ID_TAG, EBML_NEST, sizeof(MatroskaTags), offsetof(MatroskaDemuxContext,tags), {.n=matroska_tag} },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_seekhead_entry[] = {
|
|
{ MATROSKA_ID_SEEKID, EBML_UINT, 0, offsetof(MatroskaSeekhead,id) },
|
|
{ MATROSKA_ID_SEEKPOSITION, EBML_UINT, 0, offsetof(MatroskaSeekhead,pos), {.u=-1} },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_seekhead[] = {
|
|
{ MATROSKA_ID_SEEKENTRY, EBML_NEST, sizeof(MatroskaSeekhead), offsetof(MatroskaDemuxContext,seekhead), {.n=matroska_seekhead_entry} },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_segment[] = {
|
|
{ MATROSKA_ID_INFO, EBML_NEST, 0, 0, {.n=matroska_info } },
|
|
{ MATROSKA_ID_TRACKS, EBML_NEST, 0, 0, {.n=matroska_tracks } },
|
|
{ MATROSKA_ID_ATTACHMENTS, EBML_NEST, 0, 0, {.n=matroska_attachments} },
|
|
{ MATROSKA_ID_CHAPTERS, EBML_NEST, 0, 0, {.n=matroska_chapters } },
|
|
{ MATROSKA_ID_CUES, EBML_NEST, 0, 0, {.n=matroska_index } },
|
|
{ MATROSKA_ID_TAGS, EBML_NEST, 0, 0, {.n=matroska_tags } },
|
|
{ MATROSKA_ID_SEEKHEAD, EBML_NEST, 0, 0, {.n=matroska_seekhead } },
|
|
{ MATROSKA_ID_CLUSTER, EBML_STOP, 0, offsetof(MatroskaDemuxContext,has_cluster_id) },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_segments[] = {
|
|
{ MATROSKA_ID_SEGMENT, EBML_NEST, 0, 0, {.n=matroska_segment } },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_blockgroup[] = {
|
|
{ MATROSKA_ID_BLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
|
|
{ MATROSKA_ID_SIMPLEBLOCK, EBML_BIN, 0, offsetof(MatroskaBlock,bin) },
|
|
{ MATROSKA_ID_BLOCKDURATION, EBML_UINT, 0, offsetof(MatroskaBlock,duration), {.u=AV_NOPTS_VALUE} },
|
|
{ MATROSKA_ID_BLOCKREFERENCE, EBML_UINT, 0, offsetof(MatroskaBlock,reference) },
|
|
{ 1, EBML_UINT, 0, offsetof(MatroskaBlock,non_simple), {.u=1} },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_cluster[] = {
|
|
{ MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
|
|
{ MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
|
|
{ MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
|
|
{ MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
|
|
{ MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
|
|
{ 0 }
|
|
};
|
|
|
|
static EbmlSyntax matroska_clusters[] = {
|
|
{ MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster} },
|
|
{ MATROSKA_ID_INFO, EBML_NONE },
|
|
{ MATROSKA_ID_CUES, EBML_NONE },
|
|
{ MATROSKA_ID_TAGS, EBML_NONE },
|
|
{ MATROSKA_ID_SEEKHEAD, EBML_NONE },
|
|
{ 0 }
|
|
};
|
|
|
|
static const char *matroska_doctypes[] = { "matroska", "webm" };
|
|
|
|
/*
|
|
* Return: Whether we reached the end of a level in the hierarchy or not.
|
|
*/
|
|
static int ebml_level_end(MatroskaDemuxContext *matroska)
|
|
{
|
|
ByteIOContext *pb = matroska->ctx->pb;
|
|
int64_t pos = url_ftell(pb);
|
|
|
|
if (matroska->num_levels > 0) {
|
|
MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1];
|
|
if (pos - level->start >= level->length) {
|
|
matroska->num_levels--;
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Read: an "EBML number", which is defined as a variable-length
|
|
* array of bytes. The first byte indicates the length by giving a
|
|
* number of 0-bits followed by a one. The position of the first
|
|
* "one" bit inside the first byte indicates the length of this
|
|
* number.
|
|
* Returns: number of bytes read, < 0 on error
|
|
*/
|
|
static int ebml_read_num(MatroskaDemuxContext *matroska, ByteIOContext *pb,
|
|
int max_size, uint64_t *number)
|
|
{
|
|
int len_mask = 0x80, read = 1, n = 1;
|
|
int64_t total = 0;
|
|
|
|
/* The first byte tells us the length in bytes - get_byte() can normally
|
|
* return 0, but since that's not a valid first ebmlID byte, we can
|
|
* use it safely here to catch EOS. */
|
|
if (!(total = get_byte(pb))) {
|
|
/* we might encounter EOS here */
|
|
if (!url_feof(pb)) {
|
|
int64_t pos = url_ftell(pb);
|
|
av_log(matroska->ctx, AV_LOG_ERROR,
|
|
"Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
|
|
pos, pos);
|
|
}
|
|
return AVERROR(EIO); /* EOS or actual I/O error */
|
|
}
|
|
|
|
/* get the length of the EBML number */
|
|
while (read <= max_size && !(total & len_mask)) {
|
|
read++;
|
|
len_mask >>= 1;
|
|
}
|
|
if (read > max_size) {
|
|
int64_t pos = url_ftell(pb) - 1;
|
|
av_log(matroska->ctx, AV_LOG_ERROR,
|
|
"Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n",
|
|
(uint8_t) total, pos, pos);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
/* read out length */
|
|
total &= ~len_mask;
|
|
while (n++ < read)
|
|
total = (total << 8) | get_byte(pb);
|
|
|
|
*number = total;
|
|
|
|
return read;
|
|
}
|
|
|
|
/*
|
|
* Read the next element as an unsigned int.
|
|
* 0 is success, < 0 is failure.
|
|
*/
|
|
static int ebml_read_uint(ByteIOContext *pb, int size, uint64_t *num)
|
|
{
|
|
int n = 0;
|
|
|
|
if (size < 1 || size > 8)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
/* big-endian ordering; build up number */
|
|
*num = 0;
|
|
while (n++ < size)
|
|
*num = (*num << 8) | get_byte(pb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Read the next element as a float.
|
|
* 0 is success, < 0 is failure.
|
|
*/
|
|
static int ebml_read_float(ByteIOContext *pb, int size, double *num)
|
|
{
|
|
if (size == 4) {
|
|
*num= av_int2flt(get_be32(pb));
|
|
} else if(size==8){
|
|
*num= av_int2dbl(get_be64(pb));
|
|
} else
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Read the next element as an ASCII string.
|
|
* 0 is success, < 0 is failure.
|
|
*/
|
|
static int ebml_read_ascii(ByteIOContext *pb, int size, char **str)
|
|
{
|
|
av_free(*str);
|
|
/* EBML strings are usually not 0-terminated, so we allocate one
|
|
* byte more, read the string and NULL-terminate it ourselves. */
|
|
if (!(*str = av_malloc(size + 1)))
|
|
return AVERROR(ENOMEM);
|
|
if (get_buffer(pb, (uint8_t *) *str, size) != size) {
|
|
av_freep(str);
|
|
return AVERROR(EIO);
|
|
}
|
|
(*str)[size] = '\0';
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Read the next element as binary data.
|
|
* 0 is success, < 0 is failure.
|
|
*/
|
|
static int ebml_read_binary(ByteIOContext *pb, int length, EbmlBin *bin)
|
|
{
|
|
av_free(bin->data);
|
|
if (!(bin->data = av_malloc(length)))
|
|
return AVERROR(ENOMEM);
|
|
|
|
bin->size = length;
|
|
bin->pos = url_ftell(pb);
|
|
if (get_buffer(pb, bin->data, length) != length) {
|
|
av_freep(&bin->data);
|
|
return AVERROR(EIO);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Read the next element, but only the header. The contents
|
|
* are supposed to be sub-elements which can be read separately.
|
|
* 0 is success, < 0 is failure.
|
|
*/
|
|
static int ebml_read_master(MatroskaDemuxContext *matroska, int length)
|
|
{
|
|
ByteIOContext *pb = matroska->ctx->pb;
|
|
MatroskaLevel *level;
|
|
|
|
if (matroska->num_levels >= EBML_MAX_DEPTH) {
|
|
av_log(matroska->ctx, AV_LOG_ERROR,
|
|
"File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH);
|
|
return AVERROR(ENOSYS);
|
|
}
|
|
|
|
level = &matroska->levels[matroska->num_levels++];
|
|
level->start = url_ftell(pb);
|
|
level->length = length;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Read signed/unsigned "EBML" numbers.
|
|
* Return: number of bytes processed, < 0 on error
|
|
*/
|
|
static int matroska_ebmlnum_uint(MatroskaDemuxContext *matroska,
|
|
uint8_t *data, uint32_t size, uint64_t *num)
|
|
{
|
|
ByteIOContext pb;
|
|
init_put_byte(&pb, data, size, 0, NULL, NULL, NULL, NULL);
|
|
return ebml_read_num(matroska, &pb, FFMIN(size, 8), num);
|
|
}
|
|
|
|
/*
|
|
* Same as above, but signed.
|
|
*/
|
|
static int matroska_ebmlnum_sint(MatroskaDemuxContext *matroska,
|
|
uint8_t *data, uint32_t size, int64_t *num)
|
|
{
|
|
uint64_t unum;
|
|
int res;
|
|
|
|
/* read as unsigned number first */
|
|
if ((res = matroska_ebmlnum_uint(matroska, data, size, &unum)) < 0)
|
|
return res;
|
|
|
|
/* make signed (weird way) */
|
|
*num = unum - ((1LL << (7*res - 1)) - 1);
|
|
|
|
return res;
|
|
}
|
|
|
|
static int ebml_parse_elem(MatroskaDemuxContext *matroska,
|
|
EbmlSyntax *syntax, void *data);
|
|
|
|
static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
|
|
uint32_t id, void *data)
|
|
{
|
|
int i;
|
|
for (i=0; syntax[i].id; i++)
|
|
if (id == syntax[i].id)
|
|
break;
|
|
if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32)
|
|
av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id);
|
|
return ebml_parse_elem(matroska, &syntax[i], data);
|
|
}
|
|
|
|
static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
|
|
void *data)
|
|
{
|
|
uint64_t id;
|
|
int res = ebml_read_num(matroska, matroska->ctx->pb, 4, &id);
|
|
id |= 1 << 7*res;
|
|
return res < 0 ? res : ebml_parse_id(matroska, syntax, id, data);
|
|
}
|
|
|
|
static int ebml_parse_nest(MatroskaDemuxContext *matroska, EbmlSyntax *syntax,
|
|
void *data)
|
|
{
|
|
int i, res = 0;
|
|
|
|
for (i=0; syntax[i].id; i++)
|
|
switch (syntax[i].type) {
|
|
case EBML_UINT:
|
|
*(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u;
|
|
break;
|
|
case EBML_FLOAT:
|
|
*(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f;
|
|
break;
|
|
case EBML_STR:
|
|
case EBML_UTF8:
|
|
*(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s);
|
|
break;
|
|
}
|
|
|
|
while (!res && !ebml_level_end(matroska))
|
|
res = ebml_parse(matroska, syntax, data);
|
|
|
|
return res;
|
|
}
|
|
|
|
static int ebml_parse_elem(MatroskaDemuxContext *matroska,
|
|
EbmlSyntax *syntax, void *data)
|
|
{
|
|
ByteIOContext *pb = matroska->ctx->pb;
|
|
uint32_t id = syntax->id;
|
|
uint64_t length;
|
|
int res;
|
|
|
|
data = (char *)data + syntax->data_offset;
|
|
if (syntax->list_elem_size) {
|
|
EbmlList *list = data;
|
|
list->elem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size);
|
|
data = (char*)list->elem + list->nb_elem*syntax->list_elem_size;
|
|
memset(data, 0, syntax->list_elem_size);
|
|
list->nb_elem++;
|
|
}
|
|
|
|
if (syntax->type != EBML_PASS && syntax->type != EBML_STOP)
|
|
if ((res = ebml_read_num(matroska, pb, 8, &length)) < 0)
|
|
return res;
|
|
|
|
switch (syntax->type) {
|
|
case EBML_UINT: res = ebml_read_uint (pb, length, data); break;
|
|
case EBML_FLOAT: res = ebml_read_float (pb, length, data); break;
|
|
case EBML_STR:
|
|
case EBML_UTF8: res = ebml_read_ascii (pb, length, data); break;
|
|
case EBML_BIN: res = ebml_read_binary(pb, length, data); break;
|
|
case EBML_NEST: if ((res=ebml_read_master(matroska, length)) < 0)
|
|
return res;
|
|
if (id == MATROSKA_ID_SEGMENT)
|
|
matroska->segment_start = url_ftell(matroska->ctx->pb);
|
|
return ebml_parse_nest(matroska, syntax->def.n, data);
|
|
case EBML_PASS: return ebml_parse_id(matroska, syntax->def.n, id, data);
|
|
case EBML_STOP: *(int *)data = 1; return 1;
|
|
default: return url_fseek(pb,length,SEEK_CUR)<0 ? AVERROR(EIO) : 0;
|
|
}
|
|
if (res == AVERROR_INVALIDDATA)
|
|
av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
|
|
else if (res == AVERROR(EIO))
|
|
av_log(matroska->ctx, AV_LOG_ERROR, "Read error\n");
|
|
return res;
|
|
}
|
|
|
|
static void ebml_free(EbmlSyntax *syntax, void *data)
|
|
{
|
|
int i, j;
|
|
for (i=0; syntax[i].id; i++) {
|
|
void *data_off = (char *)data + syntax[i].data_offset;
|
|
switch (syntax[i].type) {
|
|
case EBML_STR:
|
|
case EBML_UTF8: av_freep(data_off); break;
|
|
case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break;
|
|
case EBML_NEST:
|
|
if (syntax[i].list_elem_size) {
|
|
EbmlList *list = data_off;
|
|
char *ptr = list->elem;
|
|
for (j=0; j<list->nb_elem; j++, ptr+=syntax[i].list_elem_size)
|
|
ebml_free(syntax[i].def.n, ptr);
|
|
av_free(list->elem);
|
|
} else
|
|
ebml_free(syntax[i].def.n, data_off);
|
|
default: break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Autodetecting...
|
|
*/
|
|
static int matroska_probe(AVProbeData *p)
|
|
{
|
|
uint64_t total = 0;
|
|
int len_mask = 0x80, size = 1, n = 1, i;
|
|
|
|
/* EBML header? */
|
|
if (AV_RB32(p->buf) != EBML_ID_HEADER)
|
|
return 0;
|
|
|
|
/* length of header */
|
|
total = p->buf[4];
|
|
while (size <= 8 && !(total & len_mask)) {
|
|
size++;
|
|
len_mask >>= 1;
|
|
}
|
|
if (size > 8)
|
|
return 0;
|
|
total &= (len_mask - 1);
|
|
while (n < size)
|
|
total = (total << 8) | p->buf[4 + n++];
|
|
|
|
/* Does the probe data contain the whole header? */
|
|
if (p->buf_size < 4 + size + total)
|
|
return 0;
|
|
|
|
/* The header should contain a known document type. For now,
|
|
* we don't parse the whole header but simply check for the
|
|
* availability of that array of characters inside the header.
|
|
* Not fully fool-proof, but good enough. */
|
|
for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++) {
|
|
int probelen = strlen(matroska_doctypes[i]);
|
|
for (n = 4+size; n <= 4+size+total-probelen; n++)
|
|
if (!memcmp(p->buf+n, matroska_doctypes[i], probelen))
|
|
return AVPROBE_SCORE_MAX;
|
|
}
|
|
|
|
// probably valid EBML header but no recognized doctype
|
|
return AVPROBE_SCORE_MAX/2;
|
|
}
|
|
|
|
static MatroskaTrack *matroska_find_track_by_num(MatroskaDemuxContext *matroska,
|
|
int num)
|
|
{
|
|
MatroskaTrack *tracks = matroska->tracks.elem;
|
|
int i;
|
|
|
|
for (i=0; i < matroska->tracks.nb_elem; i++)
|
|
if (tracks[i].num == num)
|
|
return &tracks[i];
|
|
|
|
av_log(matroska->ctx, AV_LOG_ERROR, "Invalid track number %d\n", num);
|
|
return NULL;
|
|
}
|
|
|
|
static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
|
|
MatroskaTrack *track)
|
|
{
|
|
MatroskaTrackEncoding *encodings = track->encodings.elem;
|
|
uint8_t* data = *buf;
|
|
int isize = *buf_size;
|
|
uint8_t* pkt_data = NULL;
|
|
int pkt_size = isize;
|
|
int result = 0;
|
|
int olen;
|
|
|
|
switch (encodings[0].compression.algo) {
|
|
case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP:
|
|
return encodings[0].compression.settings.size;
|
|
case MATROSKA_TRACK_ENCODING_COMP_LZO:
|
|
do {
|
|
olen = pkt_size *= 3;
|
|
pkt_data = av_realloc(pkt_data, pkt_size+AV_LZO_OUTPUT_PADDING);
|
|
result = av_lzo1x_decode(pkt_data, &olen, data, &isize);
|
|
} while (result==AV_LZO_OUTPUT_FULL && pkt_size<10000000);
|
|
if (result)
|
|
goto failed;
|
|
pkt_size -= olen;
|
|
break;
|
|
#if CONFIG_ZLIB
|
|
case MATROSKA_TRACK_ENCODING_COMP_ZLIB: {
|
|
z_stream zstream = {0};
|
|
if (inflateInit(&zstream) != Z_OK)
|
|
return -1;
|
|
zstream.next_in = data;
|
|
zstream.avail_in = isize;
|
|
do {
|
|
pkt_size *= 3;
|
|
pkt_data = av_realloc(pkt_data, pkt_size);
|
|
zstream.avail_out = pkt_size - zstream.total_out;
|
|
zstream.next_out = pkt_data + zstream.total_out;
|
|
result = inflate(&zstream, Z_NO_FLUSH);
|
|
} while (result==Z_OK && pkt_size<10000000);
|
|
pkt_size = zstream.total_out;
|
|
inflateEnd(&zstream);
|
|
if (result != Z_STREAM_END)
|
|
goto failed;
|
|
break;
|
|
}
|
|
#endif
|
|
#if CONFIG_BZLIB
|
|
case MATROSKA_TRACK_ENCODING_COMP_BZLIB: {
|
|
bz_stream bzstream = {0};
|
|
if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK)
|
|
return -1;
|
|
bzstream.next_in = data;
|
|
bzstream.avail_in = isize;
|
|
do {
|
|
pkt_size *= 3;
|
|
pkt_data = av_realloc(pkt_data, pkt_size);
|
|
bzstream.avail_out = pkt_size - bzstream.total_out_lo32;
|
|
bzstream.next_out = pkt_data + bzstream.total_out_lo32;
|
|
result = BZ2_bzDecompress(&bzstream);
|
|
} while (result==BZ_OK && pkt_size<10000000);
|
|
pkt_size = bzstream.total_out_lo32;
|
|
BZ2_bzDecompressEnd(&bzstream);
|
|
if (result != BZ_STREAM_END)
|
|
goto failed;
|
|
break;
|
|
}
|
|
#endif
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
*buf = pkt_data;
|
|
*buf_size = pkt_size;
|
|
return 0;
|
|
failed:
|
|
av_free(pkt_data);
|
|
return -1;
|
|
}
|
|
|
|
static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
|
|
AVPacket *pkt, uint64_t display_duration)
|
|
{
|
|
char *line, *layer, *ptr = pkt->data, *end = ptr+pkt->size;
|
|
for (; *ptr!=',' && ptr<end-1; ptr++);
|
|
if (*ptr == ',')
|
|
layer = ++ptr;
|
|
for (; *ptr!=',' && ptr<end-1; ptr++);
|
|
if (*ptr == ',') {
|
|
int64_t end_pts = pkt->pts + display_duration;
|
|
int sc = matroska->time_scale * pkt->pts / 10000000;
|
|
int ec = matroska->time_scale * end_pts / 10000000;
|
|
int sh, sm, ss, eh, em, es, len;
|
|
sh = sc/360000; sc -= 360000*sh;
|
|
sm = sc/ 6000; sc -= 6000*sm;
|
|
ss = sc/ 100; sc -= 100*ss;
|
|
eh = ec/360000; ec -= 360000*eh;
|
|
em = ec/ 6000; ec -= 6000*em;
|
|
es = ec/ 100; ec -= 100*es;
|
|
*ptr++ = '\0';
|
|
len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE;
|
|
if (!(line = av_malloc(len)))
|
|
return;
|
|
snprintf(line,len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
|
|
layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
|
|
av_free(pkt->data);
|
|
pkt->data = line;
|
|
pkt->size = strlen(line);
|
|
}
|
|
}
|
|
|
|
static void matroska_merge_packets(AVPacket *out, AVPacket *in)
|
|
{
|
|
out->data = av_realloc(out->data, out->size+in->size);
|
|
memcpy(out->data+out->size, in->data, in->size);
|
|
out->size += in->size;
|
|
av_destruct_packet(in);
|
|
av_free(in);
|
|
}
|
|
|
|
static void matroska_convert_tag(AVFormatContext *s, EbmlList *list,
|
|
AVMetadata **metadata, char *prefix)
|
|
{
|
|
MatroskaTag *tags = list->elem;
|
|
char key[1024];
|
|
int i;
|
|
|
|
for (i=0; i < list->nb_elem; i++) {
|
|
const char *lang = strcmp(tags[i].lang, "und") ? tags[i].lang : NULL;
|
|
if (prefix) snprintf(key, sizeof(key), "%s/%s", prefix, tags[i].name);
|
|
else av_strlcpy(key, tags[i].name, sizeof(key));
|
|
if (tags[i].def || !lang) {
|
|
av_metadata_set2(metadata, key, tags[i].string, 0);
|
|
if (tags[i].sub.nb_elem)
|
|
matroska_convert_tag(s, &tags[i].sub, metadata, key);
|
|
}
|
|
if (lang) {
|
|
av_strlcat(key, "-", sizeof(key));
|
|
av_strlcat(key, lang, sizeof(key));
|
|
av_metadata_set2(metadata, key, tags[i].string, 0);
|
|
if (tags[i].sub.nb_elem)
|
|
matroska_convert_tag(s, &tags[i].sub, metadata, key);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void matroska_convert_tags(AVFormatContext *s)
|
|
{
|
|
MatroskaDemuxContext *matroska = s->priv_data;
|
|
MatroskaTags *tags = matroska->tags.elem;
|
|
int i, j;
|
|
|
|
for (i=0; i < matroska->tags.nb_elem; i++) {
|
|
if (tags[i].target.attachuid) {
|
|
MatroskaAttachement *attachment = matroska->attachments.elem;
|
|
for (j=0; j<matroska->attachments.nb_elem; j++)
|
|
if (attachment[j].uid == tags[i].target.attachuid)
|
|
matroska_convert_tag(s, &tags[i].tag,
|
|
&attachment[j].stream->metadata, NULL);
|
|
} else if (tags[i].target.chapteruid) {
|
|
MatroskaChapter *chapter = matroska->chapters.elem;
|
|
for (j=0; j<matroska->chapters.nb_elem; j++)
|
|
if (chapter[j].uid == tags[i].target.chapteruid)
|
|
matroska_convert_tag(s, &tags[i].tag,
|
|
&chapter[j].chapter->metadata, NULL);
|
|
} else if (tags[i].target.trackuid) {
|
|
MatroskaTrack *track = matroska->tracks.elem;
|
|
for (j=0; j<matroska->tracks.nb_elem; j++)
|
|
if (track[j].uid == tags[i].target.trackuid)
|
|
matroska_convert_tag(s, &tags[i].tag,
|
|
&track[j].stream->metadata, NULL);
|
|
} else {
|
|
matroska_convert_tag(s, &tags[i].tag, &s->metadata,
|
|
tags[i].target.type);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
|
|
{
|
|
EbmlList *seekhead_list = &matroska->seekhead;
|
|
MatroskaSeekhead *seekhead = seekhead_list->elem;
|
|
uint32_t level_up = matroska->level_up;
|
|
int64_t before_pos = url_ftell(matroska->ctx->pb);
|
|
MatroskaLevel level;
|
|
int i;
|
|
|
|
for (i=0; i<seekhead_list->nb_elem; i++) {
|
|
int64_t offset = seekhead[i].pos + matroska->segment_start;
|
|
|
|
if (seekhead[i].pos <= before_pos
|
|
|| seekhead[i].id == MATROSKA_ID_SEEKHEAD
|
|
|| seekhead[i].id == MATROSKA_ID_CLUSTER)
|
|
continue;
|
|
|
|
/* seek */
|
|
if (url_fseek(matroska->ctx->pb, offset, SEEK_SET) != offset)
|
|
continue;
|
|
|
|
/* We don't want to lose our seekhead level, so we add
|
|
* a dummy. This is a crude hack. */
|
|
if (matroska->num_levels == EBML_MAX_DEPTH) {
|
|
av_log(matroska->ctx, AV_LOG_INFO,
|
|
"Max EBML element depth (%d) reached, "
|
|
"cannot parse further.\n", EBML_MAX_DEPTH);
|
|
break;
|
|
}
|
|
|
|
level.start = 0;
|
|
level.length = (uint64_t)-1;
|
|
matroska->levels[matroska->num_levels] = level;
|
|
matroska->num_levels++;
|
|
|
|
ebml_parse(matroska, matroska_segment, matroska);
|
|
|
|
/* remove dummy level */
|
|
while (matroska->num_levels) {
|
|
uint64_t length = matroska->levels[--matroska->num_levels].length;
|
|
if (length == (uint64_t)-1)
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* seek back */
|
|
url_fseek(matroska->ctx->pb, before_pos, SEEK_SET);
|
|
matroska->level_up = level_up;
|
|
}
|
|
|
|
static int matroska_aac_profile(char *codec_id)
|
|
{
|
|
static const char * const aac_profiles[] = { "MAIN", "LC", "SSR" };
|
|
int profile;
|
|
|
|
for (profile=0; profile<FF_ARRAY_ELEMS(aac_profiles); profile++)
|
|
if (strstr(codec_id, aac_profiles[profile]))
|
|
break;
|
|
return profile + 1;
|
|
}
|
|
|
|
static int matroska_aac_sri(int samplerate)
|
|
{
|
|
int sri;
|
|
|
|
for (sri=0; sri<FF_ARRAY_ELEMS(ff_mpeg4audio_sample_rates); sri++)
|
|
if (ff_mpeg4audio_sample_rates[sri] == samplerate)
|
|
break;
|
|
return sri;
|
|
}
|
|
|
|
static int matroska_read_header(AVFormatContext *s, AVFormatParameters *ap)
|
|
{
|
|
MatroskaDemuxContext *matroska = s->priv_data;
|
|
EbmlList *attachements_list = &matroska->attachments;
|
|
MatroskaAttachement *attachements;
|
|
EbmlList *chapters_list = &matroska->chapters;
|
|
MatroskaChapter *chapters;
|
|
MatroskaTrack *tracks;
|
|
EbmlList *index_list;
|
|
MatroskaIndex *index;
|
|
int index_scale = 1;
|
|
uint64_t max_start = 0;
|
|
Ebml ebml = { 0 };
|
|
AVStream *st;
|
|
int i, j;
|
|
|
|
matroska->ctx = s;
|
|
|
|
/* First read the EBML header. */
|
|
if (ebml_parse(matroska, ebml_syntax, &ebml)
|
|
|| ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t)
|
|
|| ebml.id_length > sizeof(uint32_t) || ebml.doctype_version > 2) {
|
|
av_log(matroska->ctx, AV_LOG_ERROR,
|
|
"EBML header using unsupported features\n"
|
|
"(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",
|
|
ebml.version, ebml.doctype, ebml.doctype_version);
|
|
ebml_free(ebml_syntax, &ebml);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
for (i = 0; i < FF_ARRAY_ELEMS(matroska_doctypes); i++)
|
|
if (!strcmp(ebml.doctype, matroska_doctypes[i]))
|
|
break;
|
|
if (i >= FF_ARRAY_ELEMS(matroska_doctypes)) {
|
|
av_log(s, AV_LOG_WARNING, "Unknown EBML doctype '%s'\n", ebml.doctype);
|
|
}
|
|
ebml_free(ebml_syntax, &ebml);
|
|
|
|
/* The next thing is a segment. */
|
|
if (ebml_parse(matroska, matroska_segments, matroska) < 0)
|
|
return -1;
|
|
matroska_execute_seekhead(matroska);
|
|
|
|
if (!matroska->time_scale)
|
|
matroska->time_scale = 1000000;
|
|
if (matroska->duration)
|
|
matroska->ctx->duration = matroska->duration * matroska->time_scale
|
|
* 1000 / AV_TIME_BASE;
|
|
av_metadata_set2(&s->metadata, "title", matroska->title, 0);
|
|
|
|
tracks = matroska->tracks.elem;
|
|
for (i=0; i < matroska->tracks.nb_elem; i++) {
|
|
MatroskaTrack *track = &tracks[i];
|
|
enum CodecID codec_id = CODEC_ID_NONE;
|
|
EbmlList *encodings_list = &tracks->encodings;
|
|
MatroskaTrackEncoding *encodings = encodings_list->elem;
|
|
uint8_t *extradata = NULL;
|
|
int extradata_size = 0;
|
|
int extradata_offset = 0;
|
|
ByteIOContext b;
|
|
|
|
/* Apply some sanity checks. */
|
|
if (track->type != MATROSKA_TRACK_TYPE_VIDEO &&
|
|
track->type != MATROSKA_TRACK_TYPE_AUDIO &&
|
|
track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
|
|
av_log(matroska->ctx, AV_LOG_INFO,
|
|
"Unknown or unsupported track type %"PRIu64"\n",
|
|
track->type);
|
|
continue;
|
|
}
|
|
if (track->codec_id == NULL)
|
|
continue;
|
|
|
|
if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
|
|
if (!track->default_duration)
|
|
track->default_duration = 1000000000/track->video.frame_rate;
|
|
if (!track->video.display_width)
|
|
track->video.display_width = track->video.pixel_width;
|
|
if (!track->video.display_height)
|
|
track->video.display_height = track->video.pixel_height;
|
|
} else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
|
|
if (!track->audio.out_samplerate)
|
|
track->audio.out_samplerate = track->audio.samplerate;
|
|
}
|
|
if (encodings_list->nb_elem > 1) {
|
|
av_log(matroska->ctx, AV_LOG_ERROR,
|
|
"Multiple combined encodings no supported");
|
|
} else if (encodings_list->nb_elem == 1) {
|
|
if (encodings[0].type ||
|
|
(encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP &&
|
|
#if CONFIG_ZLIB
|
|
encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_ZLIB &&
|
|
#endif
|
|
#if CONFIG_BZLIB
|
|
encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_BZLIB &&
|
|
#endif
|
|
encodings[0].compression.algo != MATROSKA_TRACK_ENCODING_COMP_LZO)) {
|
|
encodings[0].scope = 0;
|
|
av_log(matroska->ctx, AV_LOG_ERROR,
|
|
"Unsupported encoding type");
|
|
} else if (track->codec_priv.size && encodings[0].scope&2) {
|
|
uint8_t *codec_priv = track->codec_priv.data;
|
|
int offset = matroska_decode_buffer(&track->codec_priv.data,
|
|
&track->codec_priv.size,
|
|
track);
|
|
if (offset < 0) {
|
|
track->codec_priv.data = NULL;
|
|
track->codec_priv.size = 0;
|
|
av_log(matroska->ctx, AV_LOG_ERROR,
|
|
"Failed to decode codec private data\n");
|
|
} else if (offset > 0) {
|
|
track->codec_priv.data = av_malloc(track->codec_priv.size + offset);
|
|
memcpy(track->codec_priv.data,
|
|
encodings[0].compression.settings.data, offset);
|
|
memcpy(track->codec_priv.data+offset, codec_priv,
|
|
track->codec_priv.size);
|
|
track->codec_priv.size += offset;
|
|
}
|
|
if (codec_priv != track->codec_priv.data)
|
|
av_free(codec_priv);
|
|
}
|
|
}
|
|
|
|
for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){
|
|
if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id,
|
|
strlen(ff_mkv_codec_tags[j].str))){
|
|
codec_id= ff_mkv_codec_tags[j].id;
|
|
break;
|
|
}
|
|
}
|
|
|
|
st = track->stream = av_new_stream(s, 0);
|
|
if (st == NULL)
|
|
return AVERROR(ENOMEM);
|
|
|
|
if (!strcmp(track->codec_id, "V_MS/VFW/FOURCC")
|
|
&& track->codec_priv.size >= 40
|
|
&& track->codec_priv.data != NULL) {
|
|
track->ms_compat = 1;
|
|
track->video.fourcc = AV_RL32(track->codec_priv.data + 16);
|
|
codec_id = ff_codec_get_id(ff_codec_bmp_tags, track->video.fourcc);
|
|
extradata_offset = 40;
|
|
} else if (!strcmp(track->codec_id, "A_MS/ACM")
|
|
&& track->codec_priv.size >= 14
|
|
&& track->codec_priv.data != NULL) {
|
|
init_put_byte(&b, track->codec_priv.data, track->codec_priv.size,
|
|
URL_RDONLY, NULL, NULL, NULL, NULL);
|
|
ff_get_wav_header(&b, st->codec, track->codec_priv.size);
|
|
codec_id = st->codec->codec_id;
|
|
extradata_offset = FFMIN(track->codec_priv.size, 18);
|
|
} else if (!strcmp(track->codec_id, "V_QUICKTIME")
|
|
&& (track->codec_priv.size >= 86)
|
|
&& (track->codec_priv.data != NULL)) {
|
|
track->video.fourcc = AV_RL32(track->codec_priv.data);
|
|
codec_id=ff_codec_get_id(codec_movvideo_tags, track->video.fourcc);
|
|
} else if (codec_id == CODEC_ID_PCM_S16BE) {
|
|
switch (track->audio.bitdepth) {
|
|
case 8: codec_id = CODEC_ID_PCM_U8; break;
|
|
case 24: codec_id = CODEC_ID_PCM_S24BE; break;
|
|
case 32: codec_id = CODEC_ID_PCM_S32BE; break;
|
|
}
|
|
} else if (codec_id == CODEC_ID_PCM_S16LE) {
|
|
switch (track->audio.bitdepth) {
|
|
case 8: codec_id = CODEC_ID_PCM_U8; break;
|
|
case 24: codec_id = CODEC_ID_PCM_S24LE; break;
|
|
case 32: codec_id = CODEC_ID_PCM_S32LE; break;
|
|
}
|
|
} else if (codec_id==CODEC_ID_PCM_F32LE && track->audio.bitdepth==64) {
|
|
codec_id = CODEC_ID_PCM_F64LE;
|
|
} else if (codec_id == CODEC_ID_AAC && !track->codec_priv.size) {
|
|
int profile = matroska_aac_profile(track->codec_id);
|
|
int sri = matroska_aac_sri(track->audio.samplerate);
|
|
extradata = av_malloc(5);
|
|
if (extradata == NULL)
|
|
return AVERROR(ENOMEM);
|
|
extradata[0] = (profile << 3) | ((sri&0x0E) >> 1);
|
|
extradata[1] = ((sri&0x01) << 7) | (track->audio.channels<<3);
|
|
if (strstr(track->codec_id, "SBR")) {
|
|
sri = matroska_aac_sri(track->audio.out_samplerate);
|
|
extradata[2] = 0x56;
|
|
extradata[3] = 0xE5;
|
|
extradata[4] = 0x80 | (sri<<3);
|
|
extradata_size = 5;
|
|
} else
|
|
extradata_size = 2;
|
|
} else if (codec_id == CODEC_ID_TTA) {
|
|
extradata_size = 30;
|
|
extradata = av_mallocz(extradata_size);
|
|
if (extradata == NULL)
|
|
return AVERROR(ENOMEM);
|
|
init_put_byte(&b, extradata, extradata_size, 1,
|
|
NULL, NULL, NULL, NULL);
|
|
put_buffer(&b, "TTA1", 4);
|
|
put_le16(&b, 1);
|
|
put_le16(&b, track->audio.channels);
|
|
put_le16(&b, track->audio.bitdepth);
|
|
put_le32(&b, track->audio.out_samplerate);
|
|
put_le32(&b, matroska->ctx->duration * track->audio.out_samplerate);
|
|
} else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 ||
|
|
codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) {
|
|
extradata_offset = 26;
|
|
} else if (codec_id == CODEC_ID_RA_144) {
|
|
track->audio.out_samplerate = 8000;
|
|
track->audio.channels = 1;
|
|
} else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK ||
|
|
codec_id == CODEC_ID_ATRAC3 || codec_id == CODEC_ID_SIPR) {
|
|
int flavor;
|
|
init_put_byte(&b, track->codec_priv.data,track->codec_priv.size,
|
|
0, NULL, NULL, NULL, NULL);
|
|
url_fskip(&b, 22);
|
|
flavor = get_be16(&b);
|
|
track->audio.coded_framesize = get_be32(&b);
|
|
url_fskip(&b, 12);
|
|
track->audio.sub_packet_h = get_be16(&b);
|
|
track->audio.frame_size = get_be16(&b);
|
|
track->audio.sub_packet_size = get_be16(&b);
|
|
track->audio.buf = av_malloc(track->audio.frame_size * track->audio.sub_packet_h);
|
|
if (codec_id == CODEC_ID_RA_288) {
|
|
st->codec->block_align = track->audio.coded_framesize;
|
|
track->codec_priv.size = 0;
|
|
} else {
|
|
if (codec_id == CODEC_ID_SIPR && flavor < 4) {
|
|
const int sipr_bit_rate[4] = { 6504, 8496, 5000, 16000 };
|
|
track->audio.sub_packet_size = ff_sipr_subpk_size[flavor];
|
|
st->codec->bit_rate = sipr_bit_rate[flavor];
|
|
}
|
|
st->codec->block_align = track->audio.sub_packet_size;
|
|
extradata_offset = 78;
|
|
}
|
|
}
|
|
track->codec_priv.size -= extradata_offset;
|
|
|
|
if (codec_id == CODEC_ID_NONE)
|
|
av_log(matroska->ctx, AV_LOG_INFO,
|
|
"Unknown/unsupported CodecID %s.\n", track->codec_id);
|
|
|
|
if (track->time_scale < 0.01)
|
|
track->time_scale = 1.0;
|
|
av_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */
|
|
|
|
st->codec->codec_id = codec_id;
|
|
st->start_time = 0;
|
|
if (strcmp(track->language, "und"))
|
|
av_metadata_set2(&st->metadata, "language", track->language, 0);
|
|
av_metadata_set2(&st->metadata, "title", track->name, 0);
|
|
|
|
if (track->flag_default)
|
|
st->disposition |= AV_DISPOSITION_DEFAULT;
|
|
|
|
if (track->default_duration)
|
|
av_reduce(&st->codec->time_base.num, &st->codec->time_base.den,
|
|
track->default_duration, 1000000000, 30000);
|
|
|
|
if (!st->codec->extradata) {
|
|
if(extradata){
|
|
st->codec->extradata = extradata;
|
|
st->codec->extradata_size = extradata_size;
|
|
} else if(track->codec_priv.data && track->codec_priv.size > 0){
|
|
st->codec->extradata = av_mallocz(track->codec_priv.size +
|
|
FF_INPUT_BUFFER_PADDING_SIZE);
|
|
if(st->codec->extradata == NULL)
|
|
return AVERROR(ENOMEM);
|
|
st->codec->extradata_size = track->codec_priv.size;
|
|
memcpy(st->codec->extradata,
|
|
track->codec_priv.data + extradata_offset,
|
|
track->codec_priv.size);
|
|
}
|
|
}
|
|
|
|
if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
|
|
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
st->codec->codec_tag = track->video.fourcc;
|
|
st->codec->width = track->video.pixel_width;
|
|
st->codec->height = track->video.pixel_height;
|
|
av_reduce(&st->sample_aspect_ratio.num,
|
|
&st->sample_aspect_ratio.den,
|
|
st->codec->height * track->video.display_width,
|
|
st->codec-> width * track->video.display_height,
|
|
255);
|
|
if (st->codec->codec_id != CODEC_ID_H264)
|
|
st->need_parsing = AVSTREAM_PARSE_HEADERS;
|
|
if (track->default_duration)
|
|
st->avg_frame_rate = av_d2q(1000000000.0/track->default_duration, INT_MAX);
|
|
} else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
|
|
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codec->sample_rate = track->audio.out_samplerate;
|
|
st->codec->channels = track->audio.channels;
|
|
if (st->codec->codec_id != CODEC_ID_AAC)
|
|
st->need_parsing = AVSTREAM_PARSE_HEADERS;
|
|
} else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
|
|
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
|
|
}
|
|
}
|
|
|
|
attachements = attachements_list->elem;
|
|
for (j=0; j<attachements_list->nb_elem; j++) {
|
|
if (!(attachements[j].filename && attachements[j].mime &&
|
|
attachements[j].bin.data && attachements[j].bin.size > 0)) {
|
|
av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n");
|
|
} else {
|
|
AVStream *st = av_new_stream(s, 0);
|
|
if (st == NULL)
|
|
break;
|
|
av_metadata_set2(&st->metadata, "filename",attachements[j].filename, 0);
|
|
st->codec->codec_id = CODEC_ID_NONE;
|
|
st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
|
|
st->codec->extradata = av_malloc(attachements[j].bin.size);
|
|
if(st->codec->extradata == NULL)
|
|
break;
|
|
st->codec->extradata_size = attachements[j].bin.size;
|
|
memcpy(st->codec->extradata, attachements[j].bin.data, attachements[j].bin.size);
|
|
|
|
for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) {
|
|
if (!strncmp(ff_mkv_mime_tags[i].str, attachements[j].mime,
|
|
strlen(ff_mkv_mime_tags[i].str))) {
|
|
st->codec->codec_id = ff_mkv_mime_tags[i].id;
|
|
break;
|
|
}
|
|
}
|
|
attachements[j].stream = st;
|
|
}
|
|
}
|
|
|
|
chapters = chapters_list->elem;
|
|
for (i=0; i<chapters_list->nb_elem; i++)
|
|
if (chapters[i].start != AV_NOPTS_VALUE && chapters[i].uid
|
|
&& (max_start==0 || chapters[i].start > max_start)) {
|
|
chapters[i].chapter =
|
|
ff_new_chapter(s, chapters[i].uid, (AVRational){1, 1000000000},
|
|
chapters[i].start, chapters[i].end,
|
|
chapters[i].title);
|
|
av_metadata_set2(&chapters[i].chapter->metadata,
|
|
"title", chapters[i].title, 0);
|
|
max_start = chapters[i].start;
|
|
}
|
|
|
|
index_list = &matroska->index;
|
|
index = index_list->elem;
|
|
if (index_list->nb_elem
|
|
&& index[0].time > 100000000000000/matroska->time_scale) {
|
|
av_log(matroska->ctx, AV_LOG_WARNING, "Working around broken index.\n");
|
|
index_scale = matroska->time_scale;
|
|
}
|
|
for (i=0; i<index_list->nb_elem; i++) {
|
|
EbmlList *pos_list = &index[i].pos;
|
|
MatroskaIndexPos *pos = pos_list->elem;
|
|
for (j=0; j<pos_list->nb_elem; j++) {
|
|
MatroskaTrack *track = matroska_find_track_by_num(matroska,
|
|
pos[j].track);
|
|
if (track && track->stream)
|
|
av_add_index_entry(track->stream,
|
|
pos[j].pos + matroska->segment_start,
|
|
index[i].time/index_scale, 0, 0,
|
|
AVINDEX_KEYFRAME);
|
|
}
|
|
}
|
|
|
|
matroska_convert_tags(s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Put one packet in an application-supplied AVPacket struct.
|
|
* Returns 0 on success or -1 on failure.
|
|
*/
|
|
static int matroska_deliver_packet(MatroskaDemuxContext *matroska,
|
|
AVPacket *pkt)
|
|
{
|
|
if (matroska->num_packets > 0) {
|
|
memcpy(pkt, matroska->packets[0], sizeof(AVPacket));
|
|
av_free(matroska->packets[0]);
|
|
if (matroska->num_packets > 1) {
|
|
memmove(&matroska->packets[0], &matroska->packets[1],
|
|
(matroska->num_packets - 1) * sizeof(AVPacket *));
|
|
matroska->packets =
|
|
av_realloc(matroska->packets, (matroska->num_packets - 1) *
|
|
sizeof(AVPacket *));
|
|
} else {
|
|
av_freep(&matroska->packets);
|
|
}
|
|
matroska->num_packets--;
|
|
return 0;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Free all packets in our internal queue.
|
|
*/
|
|
static void matroska_clear_queue(MatroskaDemuxContext *matroska)
|
|
{
|
|
if (matroska->packets) {
|
|
int n;
|
|
for (n = 0; n < matroska->num_packets; n++) {
|
|
av_free_packet(matroska->packets[n]);
|
|
av_free(matroska->packets[n]);
|
|
}
|
|
av_freep(&matroska->packets);
|
|
matroska->num_packets = 0;
|
|
}
|
|
}
|
|
|
|
static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data,
|
|
int size, int64_t pos, uint64_t cluster_time,
|
|
uint64_t duration, int is_keyframe,
|
|
int64_t cluster_pos)
|
|
{
|
|
uint64_t timecode = AV_NOPTS_VALUE;
|
|
MatroskaTrack *track;
|
|
int res = 0;
|
|
AVStream *st;
|
|
AVPacket *pkt;
|
|
int16_t block_time;
|
|
uint32_t *lace_size = NULL;
|
|
int n, flags, laces = 0;
|
|
uint64_t num;
|
|
|
|
if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
|
|
av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
|
|
return res;
|
|
}
|
|
data += n;
|
|
size -= n;
|
|
|
|
track = matroska_find_track_by_num(matroska, num);
|
|
if (size <= 3 || !track || !track->stream) {
|
|
av_log(matroska->ctx, AV_LOG_INFO,
|
|
"Invalid stream %"PRIu64" or size %u\n", num, size);
|
|
return res;
|
|
}
|
|
st = track->stream;
|
|
if (st->discard >= AVDISCARD_ALL)
|
|
return res;
|
|
if (duration == AV_NOPTS_VALUE)
|
|
duration = track->default_duration / matroska->time_scale;
|
|
|
|
block_time = AV_RB16(data);
|
|
data += 2;
|
|
flags = *data++;
|
|
size -= 3;
|
|
if (is_keyframe == -1)
|
|
is_keyframe = flags & 0x80 ? AV_PKT_FLAG_KEY : 0;
|
|
|
|
if (cluster_time != (uint64_t)-1
|
|
&& (block_time >= 0 || cluster_time >= -block_time)) {
|
|
timecode = cluster_time + block_time;
|
|
if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE
|
|
&& timecode < track->end_timecode)
|
|
is_keyframe = 0; /* overlapping subtitles are not key frame */
|
|
if (is_keyframe)
|
|
av_add_index_entry(st, cluster_pos, timecode, 0,0,AVINDEX_KEYFRAME);
|
|
track->end_timecode = FFMAX(track->end_timecode, timecode+duration);
|
|
}
|
|
|
|
if (matroska->skip_to_keyframe && track->type != MATROSKA_TRACK_TYPE_SUBTITLE) {
|
|
if (!is_keyframe || timecode < matroska->skip_to_timecode)
|
|
return res;
|
|
matroska->skip_to_keyframe = 0;
|
|
}
|
|
|
|
switch ((flags & 0x06) >> 1) {
|
|
case 0x0: /* no lacing */
|
|
laces = 1;
|
|
lace_size = av_mallocz(sizeof(int));
|
|
lace_size[0] = size;
|
|
break;
|
|
|
|
case 0x1: /* Xiph lacing */
|
|
case 0x2: /* fixed-size lacing */
|
|
case 0x3: /* EBML lacing */
|
|
assert(size>0); // size <=3 is checked before size-=3 above
|
|
laces = (*data) + 1;
|
|
data += 1;
|
|
size -= 1;
|
|
lace_size = av_mallocz(laces * sizeof(int));
|
|
|
|
switch ((flags & 0x06) >> 1) {
|
|
case 0x1: /* Xiph lacing */ {
|
|
uint8_t temp;
|
|
uint32_t total = 0;
|
|
for (n = 0; res == 0 && n < laces - 1; n++) {
|
|
while (1) {
|
|
if (size == 0) {
|
|
res = -1;
|
|
break;
|
|
}
|
|
temp = *data;
|
|
lace_size[n] += temp;
|
|
data += 1;
|
|
size -= 1;
|
|
if (temp != 0xff)
|
|
break;
|
|
}
|
|
total += lace_size[n];
|
|
}
|
|
lace_size[n] = size - total;
|
|
break;
|
|
}
|
|
|
|
case 0x2: /* fixed-size lacing */
|
|
for (n = 0; n < laces; n++)
|
|
lace_size[n] = size / laces;
|
|
break;
|
|
|
|
case 0x3: /* EBML lacing */ {
|
|
uint32_t total;
|
|
n = matroska_ebmlnum_uint(matroska, data, size, &num);
|
|
if (n < 0) {
|
|
av_log(matroska->ctx, AV_LOG_INFO,
|
|
"EBML block data error\n");
|
|
break;
|
|
}
|
|
data += n;
|
|
size -= n;
|
|
total = lace_size[0] = num;
|
|
for (n = 1; res == 0 && n < laces - 1; n++) {
|
|
int64_t snum;
|
|
int r;
|
|
r = matroska_ebmlnum_sint(matroska, data, size, &snum);
|
|
if (r < 0) {
|
|
av_log(matroska->ctx, AV_LOG_INFO,
|
|
"EBML block data error\n");
|
|
break;
|
|
}
|
|
data += r;
|
|
size -= r;
|
|
lace_size[n] = lace_size[n - 1] + snum;
|
|
total += lace_size[n];
|
|
}
|
|
lace_size[n] = size - total;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (res == 0) {
|
|
for (n = 0; n < laces; n++) {
|
|
if ((st->codec->codec_id == CODEC_ID_RA_288 ||
|
|
st->codec->codec_id == CODEC_ID_COOK ||
|
|
st->codec->codec_id == CODEC_ID_SIPR ||
|
|
st->codec->codec_id == CODEC_ID_ATRAC3) &&
|
|
st->codec->block_align && track->audio.sub_packet_size) {
|
|
int a = st->codec->block_align;
|
|
int sps = track->audio.sub_packet_size;
|
|
int cfs = track->audio.coded_framesize;
|
|
int h = track->audio.sub_packet_h;
|
|
int y = track->audio.sub_packet_cnt;
|
|
int w = track->audio.frame_size;
|
|
int x;
|
|
|
|
if (!track->audio.pkt_cnt) {
|
|
if (st->codec->codec_id == CODEC_ID_RA_288)
|
|
for (x=0; x<h/2; x++)
|
|
memcpy(track->audio.buf+x*2*w+y*cfs,
|
|
data+x*cfs, cfs);
|
|
else if (st->codec->codec_id == CODEC_ID_SIPR)
|
|
memcpy(track->audio.buf + y*w, data, w);
|
|
else
|
|
for (x=0; x<w/sps; x++)
|
|
memcpy(track->audio.buf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps);
|
|
|
|
if (++track->audio.sub_packet_cnt >= h) {
|
|
if (st->codec->codec_id == CODEC_ID_SIPR)
|
|
ff_rm_reorder_sipr_data(track->audio.buf, h, w);
|
|
track->audio.sub_packet_cnt = 0;
|
|
track->audio.pkt_cnt = h*w / a;
|
|
}
|
|
}
|
|
while (track->audio.pkt_cnt) {
|
|
pkt = av_mallocz(sizeof(AVPacket));
|
|
av_new_packet(pkt, a);
|
|
memcpy(pkt->data, track->audio.buf
|
|
+ a * (h*w / a - track->audio.pkt_cnt--), a);
|
|
pkt->pos = pos;
|
|
pkt->stream_index = st->index;
|
|
dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
|
|
}
|
|
} else {
|
|
MatroskaTrackEncoding *encodings = track->encodings.elem;
|
|
int offset = 0, pkt_size = lace_size[n];
|
|
uint8_t *pkt_data = data;
|
|
|
|
if (lace_size[n] > size) {
|
|
av_log(matroska->ctx, AV_LOG_ERROR, "Invalid packet size\n");
|
|
break;
|
|
}
|
|
|
|
if (encodings && encodings->scope & 1) {
|
|
offset = matroska_decode_buffer(&pkt_data,&pkt_size, track);
|
|
if (offset < 0)
|
|
continue;
|
|
}
|
|
|
|
pkt = av_mallocz(sizeof(AVPacket));
|
|
/* XXX: prevent data copy... */
|
|
if (av_new_packet(pkt, pkt_size+offset) < 0) {
|
|
av_free(pkt);
|
|
res = AVERROR(ENOMEM);
|
|
break;
|
|
}
|
|
if (offset)
|
|
memcpy (pkt->data, encodings->compression.settings.data, offset);
|
|
memcpy (pkt->data+offset, pkt_data, pkt_size);
|
|
|
|
if (pkt_data != data)
|
|
av_free(pkt_data);
|
|
|
|
if (n == 0)
|
|
pkt->flags = is_keyframe;
|
|
pkt->stream_index = st->index;
|
|
|
|
if (track->ms_compat)
|
|
pkt->dts = timecode;
|
|
else
|
|
pkt->pts = timecode;
|
|
pkt->pos = pos;
|
|
if (st->codec->codec_id == CODEC_ID_TEXT)
|
|
pkt->convergence_duration = duration;
|
|
else if (track->type != MATROSKA_TRACK_TYPE_SUBTITLE)
|
|
pkt->duration = duration;
|
|
|
|
if (st->codec->codec_id == CODEC_ID_SSA)
|
|
matroska_fix_ass_packet(matroska, pkt, duration);
|
|
|
|
if (matroska->prev_pkt &&
|
|
timecode != AV_NOPTS_VALUE &&
|
|
matroska->prev_pkt->pts == timecode &&
|
|
matroska->prev_pkt->stream_index == st->index)
|
|
matroska_merge_packets(matroska->prev_pkt, pkt);
|
|
else {
|
|
dynarray_add(&matroska->packets,&matroska->num_packets,pkt);
|
|
matroska->prev_pkt = pkt;
|
|
}
|
|
}
|
|
|
|
if (timecode != AV_NOPTS_VALUE)
|
|
timecode = duration ? timecode + duration : AV_NOPTS_VALUE;
|
|
data += lace_size[n];
|
|
size -= lace_size[n];
|
|
}
|
|
}
|
|
|
|
av_free(lace_size);
|
|
return res;
|
|
}
|
|
|
|
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
|
|
{
|
|
MatroskaCluster cluster = { 0 };
|
|
EbmlList *blocks_list;
|
|
MatroskaBlock *blocks;
|
|
int i, res;
|
|
int64_t pos = url_ftell(matroska->ctx->pb);
|
|
matroska->prev_pkt = NULL;
|
|
if (matroska->has_cluster_id){
|
|
/* For the first cluster we parse, its ID was already read as
|
|
part of matroska_read_header(), so don't read it again */
|
|
res = ebml_parse_id(matroska, matroska_clusters,
|
|
MATROSKA_ID_CLUSTER, &cluster);
|
|
pos -= 4; /* sizeof the ID which was already read */
|
|
matroska->has_cluster_id = 0;
|
|
} else
|
|
res = ebml_parse(matroska, matroska_clusters, &cluster);
|
|
blocks_list = &cluster.blocks;
|
|
blocks = blocks_list->elem;
|
|
for (i=0; i<blocks_list->nb_elem; i++)
|
|
if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
|
|
int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
|
|
res=matroska_parse_block(matroska,
|
|
blocks[i].bin.data, blocks[i].bin.size,
|
|
blocks[i].bin.pos, cluster.timecode,
|
|
blocks[i].duration, is_keyframe,
|
|
pos);
|
|
}
|
|
ebml_free(matroska_cluster, &cluster);
|
|
if (res < 0) matroska->done = 1;
|
|
return res;
|
|
}
|
|
|
|
static int matroska_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
MatroskaDemuxContext *matroska = s->priv_data;
|
|
|
|
while (matroska_deliver_packet(matroska, pkt)) {
|
|
if (matroska->done)
|
|
return AVERROR_EOF;
|
|
matroska_parse_cluster(matroska);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int matroska_read_seek(AVFormatContext *s, int stream_index,
|
|
int64_t timestamp, int flags)
|
|
{
|
|
MatroskaDemuxContext *matroska = s->priv_data;
|
|
MatroskaTrack *tracks = matroska->tracks.elem;
|
|
AVStream *st = s->streams[stream_index];
|
|
int i, index, index_sub, index_min;
|
|
|
|
if (!st->nb_index_entries)
|
|
return 0;
|
|
timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
|
|
|
|
if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
|
|
url_fseek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
|
|
while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
|
|
matroska_clear_queue(matroska);
|
|
if (matroska_parse_cluster(matroska) < 0)
|
|
break;
|
|
}
|
|
}
|
|
|
|
matroska_clear_queue(matroska);
|
|
if (index < 0)
|
|
return 0;
|
|
|
|
index_min = index;
|
|
for (i=0; i < matroska->tracks.nb_elem; i++) {
|
|
tracks[i].end_timecode = 0;
|
|
if (tracks[i].type == MATROSKA_TRACK_TYPE_SUBTITLE
|
|
&& !tracks[i].stream->discard != AVDISCARD_ALL) {
|
|
index_sub = av_index_search_timestamp(tracks[i].stream, st->index_entries[index].timestamp, AVSEEK_FLAG_BACKWARD);
|
|
if (index_sub >= 0
|
|
&& st->index_entries[index_sub].pos < st->index_entries[index_min].pos
|
|
&& st->index_entries[index].timestamp - st->index_entries[index_sub].timestamp < 30000000000/matroska->time_scale)
|
|
index_min = index_sub;
|
|
}
|
|
}
|
|
|
|
url_fseek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
|
|
matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
|
|
matroska->skip_to_timecode = st->index_entries[index].timestamp;
|
|
matroska->done = 0;
|
|
av_update_cur_dts(s, st, st->index_entries[index].timestamp);
|
|
return 0;
|
|
}
|
|
|
|
static int matroska_read_close(AVFormatContext *s)
|
|
{
|
|
MatroskaDemuxContext *matroska = s->priv_data;
|
|
MatroskaTrack *tracks = matroska->tracks.elem;
|
|
int n;
|
|
|
|
matroska_clear_queue(matroska);
|
|
|
|
for (n=0; n < matroska->tracks.nb_elem; n++)
|
|
if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
|
|
av_free(tracks[n].audio.buf);
|
|
ebml_free(matroska_segment, matroska);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat matroska_demuxer = {
|
|
"matroska",
|
|
NULL_IF_CONFIG_SMALL("Matroska file format"),
|
|
sizeof(MatroskaDemuxContext),
|
|
matroska_probe,
|
|
matroska_read_header,
|
|
matroska_read_packet,
|
|
matroska_read_close,
|
|
matroska_read_seek,
|
|
.metadata_conv = ff_mkv_metadata_conv,
|
|
};
|