mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-28 12:16:12 +02:00
3295 lines
110 KiB
C
3295 lines
110 KiB
C
/*
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* MPEG-2 transport stream (aka DVB) demuxer
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* Copyright (c) 2002-2003 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 "libavutil/buffer.h"
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#include "libavutil/crc.h"
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#include "libavutil/internal.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/log.h"
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#include "libavutil/dict.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/opt.h"
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#include "libavutil/avassert.h"
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#include "libavcodec/bytestream.h"
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#include "libavcodec/get_bits.h"
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#include "libavcodec/opus.h"
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#include "avformat.h"
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#include "mpegts.h"
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#include "internal.h"
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#include "avio_internal.h"
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#include "mpeg.h"
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#include "isom.h"
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#if CONFIG_ICONV
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#include <iconv.h>
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#endif
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/* maximum size in which we look for synchronization if
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* synchronization is lost */
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#define MAX_RESYNC_SIZE 65536
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#define MAX_PES_PAYLOAD 200 * 1024
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#define MAX_MP4_DESCR_COUNT 16
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#define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
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do { \
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if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
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(modulus) = (dividend) % (divisor); \
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(prev_dividend) = (dividend); \
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} while (0)
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#define PROBE_PACKET_MAX_BUF 8192
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#define PROBE_PACKET_MARGIN 5
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enum MpegTSFilterType {
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MPEGTS_PES,
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MPEGTS_SECTION,
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MPEGTS_PCR,
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};
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typedef struct MpegTSFilter MpegTSFilter;
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typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
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int is_start, int64_t pos);
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typedef struct MpegTSPESFilter {
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PESCallback *pes_cb;
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void *opaque;
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} MpegTSPESFilter;
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typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
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typedef void SetServiceCallback (void *opaque, int ret);
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typedef struct MpegTSSectionFilter {
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int section_index;
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int section_h_size;
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int last_ver;
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unsigned crc;
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unsigned last_crc;
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uint8_t *section_buf;
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unsigned int check_crc : 1;
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unsigned int end_of_section_reached : 1;
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SectionCallback *section_cb;
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void *opaque;
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} MpegTSSectionFilter;
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struct MpegTSFilter {
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int pid;
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int es_id;
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int last_cc; /* last cc code (-1 if first packet) */
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int64_t last_pcr;
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int discard;
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enum MpegTSFilterType type;
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union {
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MpegTSPESFilter pes_filter;
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MpegTSSectionFilter section_filter;
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} u;
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};
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#define MAX_PIDS_PER_PROGRAM 64
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struct Program {
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unsigned int id; // program id/service id
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unsigned int nb_pids;
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unsigned int pids[MAX_PIDS_PER_PROGRAM];
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/** have we found pmt for this program */
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int pmt_found;
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};
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struct MpegTSContext {
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const AVClass *class;
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/* user data */
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AVFormatContext *stream;
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/** raw packet size, including FEC if present */
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int raw_packet_size;
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int size_stat[3];
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int size_stat_count;
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#define SIZE_STAT_THRESHOLD 10
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int64_t pos47_full;
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/** if true, all pids are analyzed to find streams */
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int auto_guess;
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/** compute exact PCR for each transport stream packet */
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int mpeg2ts_compute_pcr;
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/** fix dvb teletext pts */
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int fix_teletext_pts;
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int64_t cur_pcr; /**< used to estimate the exact PCR */
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int pcr_incr; /**< used to estimate the exact PCR */
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/* data needed to handle file based ts */
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/** stop parsing loop */
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int stop_parse;
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/** packet containing Audio/Video data */
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AVPacket *pkt;
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/** to detect seek */
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int64_t last_pos;
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int skip_changes;
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int skip_clear;
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int skip_unknown_pmt;
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int scan_all_pmts;
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int resync_size;
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int merge_pmt_versions;
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/******************************************/
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/* private mpegts data */
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/* scan context */
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/** structure to keep track of Program->pids mapping */
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unsigned int nb_prg;
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struct Program *prg;
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int8_t crc_validity[NB_PID_MAX];
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/** filters for various streams specified by PMT + for the PAT and PMT */
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MpegTSFilter *pids[NB_PID_MAX];
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int current_pid;
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};
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#define MPEGTS_OPTIONS \
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{ "resync_size", "set size limit for looking up a new synchronization", offsetof(MpegTSContext, resync_size), AV_OPT_TYPE_INT, { .i64 = MAX_RESYNC_SIZE}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }
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static const AVOption options[] = {
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MPEGTS_OPTIONS,
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{"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
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{.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
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{"ts_packetsize", "output option carrying the raw packet size", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
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{.i64 = 0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
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{"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
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{.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
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{"skip_unknown_pmt", "skip PMTs for programs not advertised in the PAT", offsetof(MpegTSContext, skip_unknown_pmt), AV_OPT_TYPE_BOOL,
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{.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
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{"merge_pmt_versions", "re-use streams when PMT's version/pids change", offsetof(MpegTSContext, merge_pmt_versions), AV_OPT_TYPE_BOOL,
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{.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
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{"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
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{.i64 = 0}, 0, 1, 0 },
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{"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
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{.i64 = 0}, 0, 1, 0 },
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{ NULL },
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};
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static const AVClass mpegts_class = {
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.class_name = "mpegts demuxer",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static const AVOption raw_options[] = {
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MPEGTS_OPTIONS,
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{ "compute_pcr", "compute exact PCR for each transport stream packet",
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offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
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{ .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
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{ "ts_packetsize", "output option carrying the raw packet size",
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offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
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{ .i64 = 0 }, 0, 0,
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AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
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{ NULL },
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};
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static const AVClass mpegtsraw_class = {
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.class_name = "mpegtsraw demuxer",
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.item_name = av_default_item_name,
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.option = raw_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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/* TS stream handling */
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enum MpegTSState {
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MPEGTS_HEADER = 0,
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MPEGTS_PESHEADER,
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MPEGTS_PESHEADER_FILL,
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MPEGTS_PAYLOAD,
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MPEGTS_SKIP,
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};
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/* enough for PES header + length */
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#define PES_START_SIZE 6
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#define PES_HEADER_SIZE 9
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#define MAX_PES_HEADER_SIZE (9 + 255)
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typedef struct PESContext {
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int pid;
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int pcr_pid; /**< if -1 then all packets containing PCR are considered */
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int stream_type;
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MpegTSContext *ts;
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AVFormatContext *stream;
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AVStream *st;
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AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
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enum MpegTSState state;
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/* used to get the format */
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int data_index;
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int flags; /**< copied to the AVPacket flags */
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int total_size;
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int pes_header_size;
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int extended_stream_id;
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uint8_t stream_id;
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int64_t pts, dts;
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int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
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uint8_t header[MAX_PES_HEADER_SIZE];
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AVBufferRef *buffer;
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SLConfigDescr sl;
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int merged_st;
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} PESContext;
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extern AVInputFormat ff_mpegts_demuxer;
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static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
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{
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int i;
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for (i = 0; i < ts->nb_prg; i++) {
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if (ts->prg[i].id == programid) {
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return &ts->prg[i];
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}
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}
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return NULL;
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}
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static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
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{
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AVProgram *prg = NULL;
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int i;
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for (i = 0; i < ts->stream->nb_programs; i++)
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if (ts->stream->programs[i]->id == programid) {
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prg = ts->stream->programs[i];
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break;
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}
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if (!prg)
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return;
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prg->nb_stream_indexes = 0;
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}
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static void clear_program(MpegTSContext *ts, unsigned int programid)
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{
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int i;
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clear_avprogram(ts, programid);
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for (i = 0; i < ts->nb_prg; i++)
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if (ts->prg[i].id == programid) {
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ts->prg[i].nb_pids = 0;
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ts->prg[i].pmt_found = 0;
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}
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}
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static void clear_programs(MpegTSContext *ts)
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{
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av_freep(&ts->prg);
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ts->nb_prg = 0;
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}
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static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
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{
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struct Program *p;
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if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
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ts->nb_prg = 0;
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return;
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}
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p = &ts->prg[ts->nb_prg];
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p->id = programid;
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p->nb_pids = 0;
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p->pmt_found = 0;
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ts->nb_prg++;
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}
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static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid,
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unsigned int pid)
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{
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struct Program *p = get_program(ts, programid);
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int i;
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if (!p)
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return;
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if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
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return;
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for (i = 0; i < p->nb_pids; i++)
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if (p->pids[i] == pid)
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return;
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p->pids[p->nb_pids++] = pid;
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}
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static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
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{
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struct Program *p = get_program(ts, programid);
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if (!p)
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return;
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p->pmt_found = 1;
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}
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static void update_av_program_info(AVFormatContext *s, unsigned int programid,
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unsigned int pid, int version)
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{
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int i;
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for (i = 0; i < s->nb_programs; i++) {
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AVProgram *program = s->programs[i];
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if (program->id == programid) {
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int old_pcr_pid = program->pcr_pid,
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old_version = program->pmt_version;
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program->pcr_pid = pid;
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program->pmt_version = version;
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if (old_version != -1 && old_version != version) {
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av_log(s, AV_LOG_VERBOSE,
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"detected PMT change (program=%d, version=%d/%d, pcr_pid=0x%x/0x%x)\n",
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programid, old_version, version, old_pcr_pid, pid);
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}
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break;
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}
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}
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}
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/**
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* @brief discard_pid() decides if the pid is to be discarded according
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* to caller's programs selection
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* @param ts : - TS context
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* @param pid : - pid
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* @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
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* 0 otherwise
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*/
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static int discard_pid(MpegTSContext *ts, unsigned int pid)
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{
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int i, j, k;
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int used = 0, discarded = 0;
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struct Program *p;
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/* If none of the programs have .discard=AVDISCARD_ALL then there's
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* no way we have to discard this packet */
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for (k = 0; k < ts->stream->nb_programs; k++)
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if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
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break;
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if (k == ts->stream->nb_programs)
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return 0;
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for (i = 0; i < ts->nb_prg; i++) {
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p = &ts->prg[i];
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for (j = 0; j < p->nb_pids; j++) {
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if (p->pids[j] != pid)
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continue;
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// is program with id p->id set to be discarded?
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for (k = 0; k < ts->stream->nb_programs; k++) {
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if (ts->stream->programs[k]->id == p->id) {
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if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
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discarded++;
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else
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used++;
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}
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}
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}
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}
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return !used && discarded;
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}
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/**
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* Assemble PES packets out of TS packets, and then call the "section_cb"
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* function when they are complete.
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*/
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static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
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const uint8_t *buf, int buf_size, int is_start)
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{
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MpegTSSectionFilter *tss = &tss1->u.section_filter;
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uint8_t *cur_section_buf = NULL;
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int len, offset;
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if (is_start) {
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memcpy(tss->section_buf, buf, buf_size);
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tss->section_index = buf_size;
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tss->section_h_size = -1;
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tss->end_of_section_reached = 0;
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} else {
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if (tss->end_of_section_reached)
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return;
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len = MAX_SECTION_SIZE - tss->section_index;
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if (buf_size < len)
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len = buf_size;
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memcpy(tss->section_buf + tss->section_index, buf, len);
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tss->section_index += len;
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}
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offset = 0;
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cur_section_buf = tss->section_buf;
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while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != 0xff) {
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/* compute section length if possible */
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if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
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len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
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if (len > MAX_SECTION_SIZE)
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return;
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tss->section_h_size = len;
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}
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if (tss->section_h_size != -1 &&
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tss->section_index >= offset + tss->section_h_size) {
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int crc_valid = 1;
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tss->end_of_section_reached = 1;
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if (tss->check_crc) {
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crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
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if (tss->section_h_size >= 4)
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tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
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if (crc_valid) {
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ts->crc_validity[ tss1->pid ] = 100;
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}else if (ts->crc_validity[ tss1->pid ] > -10) {
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ts->crc_validity[ tss1->pid ]--;
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}else
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crc_valid = 2;
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}
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if (crc_valid) {
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tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
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if (crc_valid != 1)
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tss->last_ver = -1;
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}
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cur_section_buf += tss->section_h_size;
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offset += tss->section_h_size;
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tss->section_h_size = -1;
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} else {
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tss->section_h_size = -1;
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tss->end_of_section_reached = 0;
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break;
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}
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}
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}
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static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
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enum MpegTSFilterType type)
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{
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MpegTSFilter *filter;
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av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
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|
if (pid >= NB_PID_MAX || ts->pids[pid])
|
|
return NULL;
|
|
filter = av_mallocz(sizeof(MpegTSFilter));
|
|
if (!filter)
|
|
return NULL;
|
|
ts->pids[pid] = filter;
|
|
|
|
filter->type = type;
|
|
filter->pid = pid;
|
|
filter->es_id = -1;
|
|
filter->last_cc = -1;
|
|
filter->last_pcr= -1;
|
|
|
|
return filter;
|
|
}
|
|
|
|
static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
|
|
unsigned int pid,
|
|
SectionCallback *section_cb,
|
|
void *opaque,
|
|
int check_crc)
|
|
{
|
|
MpegTSFilter *filter;
|
|
MpegTSSectionFilter *sec;
|
|
|
|
if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION)))
|
|
return NULL;
|
|
sec = &filter->u.section_filter;
|
|
sec->section_cb = section_cb;
|
|
sec->opaque = opaque;
|
|
sec->section_buf = av_mallocz(MAX_SECTION_SIZE);
|
|
sec->check_crc = check_crc;
|
|
sec->last_ver = -1;
|
|
|
|
if (!sec->section_buf) {
|
|
av_free(filter);
|
|
return NULL;
|
|
}
|
|
return filter;
|
|
}
|
|
|
|
static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
|
|
PESCallback *pes_cb,
|
|
void *opaque)
|
|
{
|
|
MpegTSFilter *filter;
|
|
MpegTSPESFilter *pes;
|
|
|
|
if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
|
|
return NULL;
|
|
|
|
pes = &filter->u.pes_filter;
|
|
pes->pes_cb = pes_cb;
|
|
pes->opaque = opaque;
|
|
return filter;
|
|
}
|
|
|
|
static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
|
|
{
|
|
return mpegts_open_filter(ts, pid, MPEGTS_PCR);
|
|
}
|
|
|
|
static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
|
|
{
|
|
int pid;
|
|
|
|
pid = filter->pid;
|
|
if (filter->type == MPEGTS_SECTION)
|
|
av_freep(&filter->u.section_filter.section_buf);
|
|
else if (filter->type == MPEGTS_PES) {
|
|
PESContext *pes = filter->u.pes_filter.opaque;
|
|
av_buffer_unref(&pes->buffer);
|
|
/* referenced private data will be freed later in
|
|
* avformat_close_input (pes->st->priv_data == pes) */
|
|
if (!pes->st || pes->merged_st) {
|
|
av_freep(&filter->u.pes_filter.opaque);
|
|
}
|
|
}
|
|
|
|
av_free(filter);
|
|
ts->pids[pid] = NULL;
|
|
}
|
|
|
|
static int analyze(const uint8_t *buf, int size, int packet_size,
|
|
int probe)
|
|
{
|
|
int stat[TS_MAX_PACKET_SIZE];
|
|
int stat_all = 0;
|
|
int i;
|
|
int best_score = 0;
|
|
|
|
memset(stat, 0, packet_size * sizeof(*stat));
|
|
|
|
for (i = 0; i < size - 3; i++) {
|
|
if (buf[i] == 0x47) {
|
|
int pid = AV_RB16(buf+1) & 0x1FFF;
|
|
int asc = buf[i + 3] & 0x30;
|
|
if (!probe || pid == 0x1FFF || asc) {
|
|
int x = i % packet_size;
|
|
stat[x]++;
|
|
stat_all++;
|
|
if (stat[x] > best_score) {
|
|
best_score = stat[x];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
|
|
}
|
|
|
|
/* autodetect fec presence */
|
|
static int get_packet_size(AVFormatContext* s)
|
|
{
|
|
int score, fec_score, dvhs_score;
|
|
int margin;
|
|
int ret;
|
|
|
|
/*init buffer to store stream for probing */
|
|
uint8_t buf[PROBE_PACKET_MAX_BUF] = {0};
|
|
int buf_size = 0;
|
|
|
|
while (buf_size < PROBE_PACKET_MAX_BUF) {
|
|
ret = avio_read_partial(s->pb, buf + buf_size, PROBE_PACKET_MAX_BUF - buf_size);
|
|
if (ret < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
buf_size += ret;
|
|
|
|
score = analyze(buf, buf_size, TS_PACKET_SIZE, 0);
|
|
dvhs_score = analyze(buf, buf_size, TS_DVHS_PACKET_SIZE, 0);
|
|
fec_score = analyze(buf, buf_size, TS_FEC_PACKET_SIZE, 0);
|
|
av_log(s, AV_LOG_TRACE, "Probe: %d, score: %d, dvhs_score: %d, fec_score: %d \n",
|
|
buf_size, score, dvhs_score, fec_score);
|
|
|
|
margin = mid_pred(score, fec_score, dvhs_score);
|
|
|
|
if (buf_size < PROBE_PACKET_MAX_BUF)
|
|
margin += PROBE_PACKET_MARGIN; /*if buffer not filled */
|
|
|
|
if (score > margin)
|
|
return TS_PACKET_SIZE;
|
|
else if (dvhs_score > margin)
|
|
return TS_DVHS_PACKET_SIZE;
|
|
else if (fec_score > margin)
|
|
return TS_FEC_PACKET_SIZE;
|
|
}
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
typedef struct SectionHeader {
|
|
uint8_t tid;
|
|
uint16_t id;
|
|
uint8_t version;
|
|
uint8_t sec_num;
|
|
uint8_t last_sec_num;
|
|
} SectionHeader;
|
|
|
|
static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
|
|
{
|
|
if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
|
|
return 1;
|
|
|
|
tssf->last_ver = h->version;
|
|
tssf->last_crc = tssf->crc;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int get8(const uint8_t **pp, const uint8_t *p_end)
|
|
{
|
|
const uint8_t *p;
|
|
int c;
|
|
|
|
p = *pp;
|
|
if (p >= p_end)
|
|
return AVERROR_INVALIDDATA;
|
|
c = *p++;
|
|
*pp = p;
|
|
return c;
|
|
}
|
|
|
|
static inline int get16(const uint8_t **pp, const uint8_t *p_end)
|
|
{
|
|
const uint8_t *p;
|
|
int c;
|
|
|
|
p = *pp;
|
|
if (1 >= p_end - p)
|
|
return AVERROR_INVALIDDATA;
|
|
c = AV_RB16(p);
|
|
p += 2;
|
|
*pp = p;
|
|
return c;
|
|
}
|
|
|
|
/* read and allocate a DVB string preceded by its length */
|
|
static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
|
|
{
|
|
int len;
|
|
const uint8_t *p;
|
|
char *str;
|
|
|
|
p = *pp;
|
|
len = get8(&p, p_end);
|
|
if (len < 0)
|
|
return NULL;
|
|
if (len > p_end - p)
|
|
return NULL;
|
|
#if CONFIG_ICONV
|
|
if (len) {
|
|
const char *encodings[] = {
|
|
"ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7",
|
|
"ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11",
|
|
"", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "", "", "", "",
|
|
"", "UCS-2BE", "KSC_5601", "GB2312", "UCS-2BE", "UTF-8", "", "",
|
|
"", "", "", "", "", "", "", ""
|
|
};
|
|
iconv_t cd;
|
|
char *in, *out;
|
|
size_t inlen = len, outlen = inlen * 6 + 1;
|
|
if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
|
|
char iso8859[12];
|
|
snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);
|
|
inlen -= 3;
|
|
in = (char *)p + 3;
|
|
cd = iconv_open("UTF-8", iso8859);
|
|
} else if (p[0] < 0x20) {
|
|
inlen -= 1;
|
|
in = (char *)p + 1;
|
|
cd = iconv_open("UTF-8", encodings[*p]);
|
|
} else {
|
|
in = (char *)p;
|
|
cd = iconv_open("UTF-8", encodings[0]);
|
|
}
|
|
if (cd == (iconv_t)-1)
|
|
goto no_iconv;
|
|
str = out = av_malloc(outlen);
|
|
if (!str) {
|
|
iconv_close(cd);
|
|
return NULL;
|
|
}
|
|
if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
|
|
iconv_close(cd);
|
|
av_freep(&str);
|
|
goto no_iconv;
|
|
}
|
|
iconv_close(cd);
|
|
*out = 0;
|
|
*pp = p + len;
|
|
return str;
|
|
}
|
|
no_iconv:
|
|
#endif
|
|
str = av_malloc(len + 1);
|
|
if (!str)
|
|
return NULL;
|
|
memcpy(str, p, len);
|
|
str[len] = '\0';
|
|
p += len;
|
|
*pp = p;
|
|
return str;
|
|
}
|
|
|
|
static int parse_section_header(SectionHeader *h,
|
|
const uint8_t **pp, const uint8_t *p_end)
|
|
{
|
|
int val;
|
|
|
|
val = get8(pp, p_end);
|
|
if (val < 0)
|
|
return val;
|
|
h->tid = val;
|
|
*pp += 2;
|
|
val = get16(pp, p_end);
|
|
if (val < 0)
|
|
return val;
|
|
h->id = val;
|
|
val = get8(pp, p_end);
|
|
if (val < 0)
|
|
return val;
|
|
h->version = (val >> 1) & 0x1f;
|
|
val = get8(pp, p_end);
|
|
if (val < 0)
|
|
return val;
|
|
h->sec_num = val;
|
|
val = get8(pp, p_end);
|
|
if (val < 0)
|
|
return val;
|
|
h->last_sec_num = val;
|
|
return 0;
|
|
}
|
|
|
|
typedef struct StreamType {
|
|
uint32_t stream_type;
|
|
enum AVMediaType codec_type;
|
|
enum AVCodecID codec_id;
|
|
} StreamType;
|
|
|
|
static const StreamType ISO_types[] = {
|
|
{ 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
|
|
{ 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
|
|
{ 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
|
|
{ 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
|
|
{ 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
|
|
{ 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
|
|
/* Makito encoder sets stream type 0x11 for AAC,
|
|
* so auto-detect LOAS/LATM instead of hardcoding it. */
|
|
#if !CONFIG_LOAS_DEMUXER
|
|
{ 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
|
|
#endif
|
|
{ 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
|
|
{ 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
|
|
{ 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
|
|
{ 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
|
|
{ 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
|
|
{ 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
|
|
{ 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
|
|
{ 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
|
|
{ 0 },
|
|
};
|
|
|
|
static const StreamType HDMV_types[] = {
|
|
{ 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
|
|
{ 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
|
|
{ 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
|
|
{ 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
|
|
{ 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
|
|
{ 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
|
|
{ 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
|
|
{ 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
|
|
{ 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
|
|
{ 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
|
|
{ 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
|
|
{ 0 },
|
|
};
|
|
|
|
/* SCTE types */
|
|
static const StreamType SCTE_types[] = {
|
|
{ 0x86, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
|
|
{ 0 },
|
|
};
|
|
|
|
/* ATSC ? */
|
|
static const StreamType MISC_types[] = {
|
|
{ 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
|
|
{ 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
|
|
{ 0 },
|
|
};
|
|
|
|
static const StreamType REGD_types[] = {
|
|
{ MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
|
|
{ MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
|
|
{ MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
|
|
{ MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
|
|
{ MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
|
|
{ MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
|
|
{ MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
|
|
{ MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
|
|
{ MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
|
|
{ MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
|
|
{ MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
|
|
{ MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
|
|
{ 0 },
|
|
};
|
|
|
|
static const StreamType METADATA_types[] = {
|
|
{ MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
|
|
{ MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
|
|
{ 0 },
|
|
};
|
|
|
|
/* descriptor present */
|
|
static const StreamType DESC_types[] = {
|
|
{ 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
|
|
{ 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
|
|
{ 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
|
|
{ 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
|
|
{ 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
|
|
{ 0 },
|
|
};
|
|
|
|
static void mpegts_find_stream_type(AVStream *st,
|
|
uint32_t stream_type,
|
|
const StreamType *types)
|
|
{
|
|
for (; types->stream_type; types++)
|
|
if (stream_type == types->stream_type) {
|
|
if (st->codecpar->codec_type != types->codec_type ||
|
|
st->codecpar->codec_id != types->codec_id) {
|
|
st->codecpar->codec_type = types->codec_type;
|
|
st->codecpar->codec_id = types->codec_id;
|
|
st->internal->need_context_update = 1;
|
|
}
|
|
st->request_probe = 0;
|
|
return;
|
|
}
|
|
}
|
|
|
|
static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
|
|
uint32_t stream_type, uint32_t prog_reg_desc)
|
|
{
|
|
int old_codec_type = st->codecpar->codec_type;
|
|
int old_codec_id = st->codecpar->codec_id;
|
|
int old_codec_tag = st->codecpar->codec_tag;
|
|
|
|
if (avcodec_is_open(st->internal->avctx)) {
|
|
av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
|
|
return 0;
|
|
}
|
|
|
|
avpriv_set_pts_info(st, 33, 1, 90000);
|
|
st->priv_data = pes;
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
|
|
st->codecpar->codec_id = AV_CODEC_ID_NONE;
|
|
st->need_parsing = AVSTREAM_PARSE_FULL;
|
|
pes->st = st;
|
|
pes->stream_type = stream_type;
|
|
|
|
av_log(pes->stream, AV_LOG_DEBUG,
|
|
"stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
|
|
st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
|
|
|
|
st->codecpar->codec_tag = pes->stream_type;
|
|
|
|
mpegts_find_stream_type(st, pes->stream_type, ISO_types);
|
|
if (pes->stream_type == 4 || pes->stream_type == 0x0f)
|
|
st->request_probe = 50;
|
|
if ((prog_reg_desc == AV_RL32("HDMV") ||
|
|
prog_reg_desc == AV_RL32("HDPR")) &&
|
|
st->codecpar->codec_id == AV_CODEC_ID_NONE) {
|
|
mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
|
|
if (pes->stream_type == 0x83) {
|
|
// HDMV TrueHD streams also contain an AC3 coded version of the
|
|
// audio track - add a second stream for this
|
|
AVStream *sub_st;
|
|
// priv_data cannot be shared between streams
|
|
PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
|
|
if (!sub_pes)
|
|
return AVERROR(ENOMEM);
|
|
memcpy(sub_pes, pes, sizeof(*sub_pes));
|
|
|
|
sub_st = avformat_new_stream(pes->stream, NULL);
|
|
if (!sub_st) {
|
|
av_free(sub_pes);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
sub_st->id = pes->pid;
|
|
avpriv_set_pts_info(sub_st, 33, 1, 90000);
|
|
sub_st->priv_data = sub_pes;
|
|
sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
|
|
sub_st->need_parsing = AVSTREAM_PARSE_FULL;
|
|
sub_pes->sub_st = pes->sub_st = sub_st;
|
|
}
|
|
}
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
|
|
mpegts_find_stream_type(st, pes->stream_type, MISC_types);
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
|
|
st->codecpar->codec_id = old_codec_id;
|
|
st->codecpar->codec_type = old_codec_type;
|
|
}
|
|
if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
|
|
(st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
|
|
st->probe_packets > 0 &&
|
|
stream_type == STREAM_TYPE_PRIVATE_DATA) {
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
|
|
st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
|
|
st->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
|
|
}
|
|
|
|
/* queue a context update if properties changed */
|
|
if (old_codec_type != st->codecpar->codec_type ||
|
|
old_codec_id != st->codecpar->codec_id ||
|
|
old_codec_tag != st->codecpar->codec_tag)
|
|
st->internal->need_context_update = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void reset_pes_packet_state(PESContext *pes)
|
|
{
|
|
pes->pts = AV_NOPTS_VALUE;
|
|
pes->dts = AV_NOPTS_VALUE;
|
|
pes->data_index = 0;
|
|
pes->flags = 0;
|
|
av_buffer_unref(&pes->buffer);
|
|
}
|
|
|
|
static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
|
|
{
|
|
av_init_packet(pkt);
|
|
pkt->data = (uint8_t *)buffer;
|
|
pkt->size = len;
|
|
}
|
|
|
|
static int new_pes_packet(PESContext *pes, AVPacket *pkt)
|
|
{
|
|
uint8_t *sd;
|
|
|
|
av_init_packet(pkt);
|
|
|
|
pkt->buf = pes->buffer;
|
|
pkt->data = pes->buffer->data;
|
|
pkt->size = pes->data_index;
|
|
|
|
if (pes->total_size != MAX_PES_PAYLOAD &&
|
|
pes->pes_header_size + pes->data_index != pes->total_size +
|
|
PES_START_SIZE) {
|
|
av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
|
|
pes->flags |= AV_PKT_FLAG_CORRUPT;
|
|
}
|
|
memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
|
|
|
|
// Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
|
|
if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
|
|
pkt->stream_index = pes->sub_st->index;
|
|
else
|
|
pkt->stream_index = pes->st->index;
|
|
pkt->pts = pes->pts;
|
|
pkt->dts = pes->dts;
|
|
/* store position of first TS packet of this PES packet */
|
|
pkt->pos = pes->ts_packet_pos;
|
|
pkt->flags = pes->flags;
|
|
|
|
pes->buffer = NULL;
|
|
reset_pes_packet_state(pes);
|
|
|
|
sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
|
|
if (!sd)
|
|
return AVERROR(ENOMEM);
|
|
*sd = pes->stream_id;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static uint64_t get_ts64(GetBitContext *gb, int bits)
|
|
{
|
|
if (get_bits_left(gb) < bits)
|
|
return AV_NOPTS_VALUE;
|
|
return get_bits64(gb, bits);
|
|
}
|
|
|
|
static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
|
|
const uint8_t *buf, int buf_size)
|
|
{
|
|
GetBitContext gb;
|
|
int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
|
|
int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
|
|
int dts_flag = -1, cts_flag = -1;
|
|
int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
|
|
uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
|
|
int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
|
|
|
|
memcpy(buf_padded, buf, buf_padded_size);
|
|
|
|
init_get_bits(&gb, buf_padded, buf_padded_size * 8);
|
|
|
|
if (sl->use_au_start)
|
|
au_start_flag = get_bits1(&gb);
|
|
if (sl->use_au_end)
|
|
au_end_flag = get_bits1(&gb);
|
|
if (!sl->use_au_start && !sl->use_au_end)
|
|
au_start_flag = au_end_flag = 1;
|
|
if (sl->ocr_len > 0)
|
|
ocr_flag = get_bits1(&gb);
|
|
if (sl->use_idle)
|
|
idle_flag = get_bits1(&gb);
|
|
if (sl->use_padding)
|
|
padding_flag = get_bits1(&gb);
|
|
if (padding_flag)
|
|
padding_bits = get_bits(&gb, 3);
|
|
|
|
if (!idle_flag && (!padding_flag || padding_bits != 0)) {
|
|
if (sl->packet_seq_num_len)
|
|
skip_bits_long(&gb, sl->packet_seq_num_len);
|
|
if (sl->degr_prior_len)
|
|
if (get_bits1(&gb))
|
|
skip_bits(&gb, sl->degr_prior_len);
|
|
if (ocr_flag)
|
|
skip_bits_long(&gb, sl->ocr_len);
|
|
if (au_start_flag) {
|
|
if (sl->use_rand_acc_pt)
|
|
get_bits1(&gb);
|
|
if (sl->au_seq_num_len > 0)
|
|
skip_bits_long(&gb, sl->au_seq_num_len);
|
|
if (sl->use_timestamps) {
|
|
dts_flag = get_bits1(&gb);
|
|
cts_flag = get_bits1(&gb);
|
|
}
|
|
}
|
|
if (sl->inst_bitrate_len)
|
|
inst_bitrate_flag = get_bits1(&gb);
|
|
if (dts_flag == 1)
|
|
dts = get_ts64(&gb, sl->timestamp_len);
|
|
if (cts_flag == 1)
|
|
cts = get_ts64(&gb, sl->timestamp_len);
|
|
if (sl->au_len > 0)
|
|
skip_bits_long(&gb, sl->au_len);
|
|
if (inst_bitrate_flag)
|
|
skip_bits_long(&gb, sl->inst_bitrate_len);
|
|
}
|
|
|
|
if (dts != AV_NOPTS_VALUE)
|
|
pes->dts = dts;
|
|
if (cts != AV_NOPTS_VALUE)
|
|
pes->pts = cts;
|
|
|
|
if (sl->timestamp_len && sl->timestamp_res)
|
|
avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
|
|
|
|
return (get_bits_count(&gb) + 7) >> 3;
|
|
}
|
|
|
|
/* return non zero if a packet could be constructed */
|
|
static int mpegts_push_data(MpegTSFilter *filter,
|
|
const uint8_t *buf, int buf_size, int is_start,
|
|
int64_t pos)
|
|
{
|
|
PESContext *pes = filter->u.pes_filter.opaque;
|
|
MpegTSContext *ts = pes->ts;
|
|
const uint8_t *p;
|
|
int ret, len, code;
|
|
|
|
if (!ts->pkt)
|
|
return 0;
|
|
|
|
if (is_start) {
|
|
if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
|
|
ret = new_pes_packet(pes, ts->pkt);
|
|
if (ret < 0)
|
|
return ret;
|
|
ts->stop_parse = 1;
|
|
} else {
|
|
reset_pes_packet_state(pes);
|
|
}
|
|
pes->state = MPEGTS_HEADER;
|
|
pes->ts_packet_pos = pos;
|
|
}
|
|
p = buf;
|
|
while (buf_size > 0) {
|
|
switch (pes->state) {
|
|
case MPEGTS_HEADER:
|
|
len = PES_START_SIZE - pes->data_index;
|
|
if (len > buf_size)
|
|
len = buf_size;
|
|
memcpy(pes->header + pes->data_index, p, len);
|
|
pes->data_index += len;
|
|
p += len;
|
|
buf_size -= len;
|
|
if (pes->data_index == PES_START_SIZE) {
|
|
/* we got all the PES or section header. We can now
|
|
* decide */
|
|
if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
|
|
pes->header[2] == 0x01) {
|
|
/* it must be an MPEG-2 PES stream */
|
|
code = pes->header[3] | 0x100;
|
|
av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
|
|
code);
|
|
pes->stream_id = pes->header[3];
|
|
|
|
if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
|
|
(!pes->sub_st ||
|
|
pes->sub_st->discard == AVDISCARD_ALL)) ||
|
|
code == 0x1be) /* padding_stream */
|
|
goto skip;
|
|
|
|
/* stream not present in PMT */
|
|
if (!pes->st) {
|
|
if (ts->skip_changes)
|
|
goto skip;
|
|
if (ts->merge_pmt_versions)
|
|
goto skip; /* wait for PMT to merge new stream */
|
|
|
|
pes->st = avformat_new_stream(ts->stream, NULL);
|
|
if (!pes->st)
|
|
return AVERROR(ENOMEM);
|
|
pes->st->id = pes->pid;
|
|
mpegts_set_stream_info(pes->st, pes, 0, 0);
|
|
}
|
|
|
|
pes->total_size = AV_RB16(pes->header + 4);
|
|
/* NOTE: a zero total size means the PES size is
|
|
* unbounded */
|
|
if (!pes->total_size)
|
|
pes->total_size = MAX_PES_PAYLOAD;
|
|
|
|
/* allocate pes buffer */
|
|
pes->buffer = av_buffer_alloc(pes->total_size +
|
|
AV_INPUT_BUFFER_PADDING_SIZE);
|
|
if (!pes->buffer)
|
|
return AVERROR(ENOMEM);
|
|
|
|
if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
|
|
code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
|
|
code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
|
|
code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
|
|
pes->state = MPEGTS_PESHEADER;
|
|
if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
|
|
av_log(pes->stream, AV_LOG_TRACE,
|
|
"pid=%x stream_type=%x probing\n",
|
|
pes->pid,
|
|
pes->stream_type);
|
|
pes->st->request_probe = 1;
|
|
}
|
|
} else {
|
|
pes->pes_header_size = 6;
|
|
pes->state = MPEGTS_PAYLOAD;
|
|
pes->data_index = 0;
|
|
}
|
|
} else {
|
|
/* otherwise, it should be a table */
|
|
/* skip packet */
|
|
skip:
|
|
pes->state = MPEGTS_SKIP;
|
|
continue;
|
|
}
|
|
}
|
|
break;
|
|
/**********************************************/
|
|
/* PES packing parsing */
|
|
case MPEGTS_PESHEADER:
|
|
len = PES_HEADER_SIZE - pes->data_index;
|
|
if (len < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
if (len > buf_size)
|
|
len = buf_size;
|
|
memcpy(pes->header + pes->data_index, p, len);
|
|
pes->data_index += len;
|
|
p += len;
|
|
buf_size -= len;
|
|
if (pes->data_index == PES_HEADER_SIZE) {
|
|
pes->pes_header_size = pes->header[8] + 9;
|
|
pes->state = MPEGTS_PESHEADER_FILL;
|
|
}
|
|
break;
|
|
case MPEGTS_PESHEADER_FILL:
|
|
len = pes->pes_header_size - pes->data_index;
|
|
if (len < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
if (len > buf_size)
|
|
len = buf_size;
|
|
memcpy(pes->header + pes->data_index, p, len);
|
|
pes->data_index += len;
|
|
p += len;
|
|
buf_size -= len;
|
|
if (pes->data_index == pes->pes_header_size) {
|
|
const uint8_t *r;
|
|
unsigned int flags, pes_ext, skip;
|
|
|
|
flags = pes->header[7];
|
|
r = pes->header + 9;
|
|
pes->pts = AV_NOPTS_VALUE;
|
|
pes->dts = AV_NOPTS_VALUE;
|
|
if ((flags & 0xc0) == 0x80) {
|
|
pes->dts = pes->pts = ff_parse_pes_pts(r);
|
|
r += 5;
|
|
} else if ((flags & 0xc0) == 0xc0) {
|
|
pes->pts = ff_parse_pes_pts(r);
|
|
r += 5;
|
|
pes->dts = ff_parse_pes_pts(r);
|
|
r += 5;
|
|
}
|
|
pes->extended_stream_id = -1;
|
|
if (flags & 0x01) { /* PES extension */
|
|
pes_ext = *r++;
|
|
/* Skip PES private data, program packet sequence counter and P-STD buffer */
|
|
skip = (pes_ext >> 4) & 0xb;
|
|
skip += skip & 0x9;
|
|
r += skip;
|
|
if ((pes_ext & 0x41) == 0x01 &&
|
|
(r + 2) <= (pes->header + pes->pes_header_size)) {
|
|
/* PES extension 2 */
|
|
if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
|
|
pes->extended_stream_id = r[1];
|
|
}
|
|
}
|
|
|
|
/* we got the full header. We parse it and get the payload */
|
|
pes->state = MPEGTS_PAYLOAD;
|
|
pes->data_index = 0;
|
|
if (pes->stream_type == 0x12 && buf_size > 0) {
|
|
int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
|
|
buf_size);
|
|
pes->pes_header_size += sl_header_bytes;
|
|
p += sl_header_bytes;
|
|
buf_size -= sl_header_bytes;
|
|
}
|
|
if (pes->stream_type == 0x15 && buf_size >= 5) {
|
|
/* skip metadata access unit header */
|
|
pes->pes_header_size += 5;
|
|
p += 5;
|
|
buf_size -= 5;
|
|
}
|
|
if ( pes->ts->fix_teletext_pts
|
|
&& ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
|
|
|| pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
|
|
) {
|
|
AVProgram *p = NULL;
|
|
int pcr_found = 0;
|
|
while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
|
|
if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
|
|
MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
|
|
if (f) {
|
|
AVStream *st = NULL;
|
|
if (f->type == MPEGTS_PES) {
|
|
PESContext *pcrpes = f->u.pes_filter.opaque;
|
|
if (pcrpes)
|
|
st = pcrpes->st;
|
|
} else if (f->type == MPEGTS_PCR) {
|
|
int i;
|
|
for (i = 0; i < p->nb_stream_indexes; i++) {
|
|
AVStream *pst = pes->stream->streams[p->stream_index[i]];
|
|
if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
|
|
st = pst;
|
|
}
|
|
}
|
|
if (f->last_pcr != -1 && st && st->discard != AVDISCARD_ALL) {
|
|
// teletext packets do not always have correct timestamps,
|
|
// the standard says they should be handled after 40.6 ms at most,
|
|
// and the pcr error to this packet should be no more than 100 ms.
|
|
// TODO: we should interpolate the PCR, not just use the last one
|
|
int64_t pcr = f->last_pcr / 300;
|
|
pcr_found = 1;
|
|
pes->st->pts_wrap_reference = st->pts_wrap_reference;
|
|
pes->st->pts_wrap_behavior = st->pts_wrap_behavior;
|
|
if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
|
|
pes->pts = pes->dts = pcr;
|
|
} else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
|
|
pes->dts > pcr + 3654 + 9000) {
|
|
pes->pts = pes->dts = pcr + 3654 + 9000;
|
|
} else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
|
|
pes->dts > pcr + 10*90000) { //10sec
|
|
pes->pts = pes->dts = pcr + 3654 + 9000;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!pcr_found) {
|
|
av_log(pes->stream, AV_LOG_VERBOSE,
|
|
"Forcing DTS/PTS to be unset for a "
|
|
"non-trustworthy PES packet for PID %d as "
|
|
"PCR hasn't been received yet.\n",
|
|
pes->pid);
|
|
pes->dts = pes->pts = AV_NOPTS_VALUE;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case MPEGTS_PAYLOAD:
|
|
if (pes->buffer) {
|
|
if (pes->data_index > 0 &&
|
|
pes->data_index + buf_size > pes->total_size) {
|
|
ret = new_pes_packet(pes, ts->pkt);
|
|
if (ret < 0)
|
|
return ret;
|
|
pes->total_size = MAX_PES_PAYLOAD;
|
|
pes->buffer = av_buffer_alloc(pes->total_size +
|
|
AV_INPUT_BUFFER_PADDING_SIZE);
|
|
if (!pes->buffer)
|
|
return AVERROR(ENOMEM);
|
|
ts->stop_parse = 1;
|
|
} else if (pes->data_index == 0 &&
|
|
buf_size > pes->total_size) {
|
|
// pes packet size is < ts size packet and pes data is padded with 0xff
|
|
// not sure if this is legal in ts but see issue #2392
|
|
buf_size = pes->total_size;
|
|
}
|
|
memcpy(pes->buffer->data + pes->data_index, p, buf_size);
|
|
pes->data_index += buf_size;
|
|
/* emit complete packets with known packet size
|
|
* decreases demuxer delay for infrequent packets like subtitles from
|
|
* a couple of seconds to milliseconds for properly muxed files.
|
|
* total_size is the number of bytes following pes_packet_length
|
|
* in the pes header, i.e. not counting the first PES_START_SIZE bytes */
|
|
if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
|
|
pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
|
|
ts->stop_parse = 1;
|
|
ret = new_pes_packet(pes, ts->pkt);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
buf_size = 0;
|
|
break;
|
|
case MPEGTS_SKIP:
|
|
buf_size = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
|
|
{
|
|
MpegTSFilter *tss;
|
|
PESContext *pes;
|
|
|
|
/* if no pid found, then add a pid context */
|
|
pes = av_mallocz(sizeof(PESContext));
|
|
if (!pes)
|
|
return 0;
|
|
pes->ts = ts;
|
|
pes->stream = ts->stream;
|
|
pes->pid = pid;
|
|
pes->pcr_pid = pcr_pid;
|
|
pes->state = MPEGTS_SKIP;
|
|
pes->pts = AV_NOPTS_VALUE;
|
|
pes->dts = AV_NOPTS_VALUE;
|
|
tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
|
|
if (!tss) {
|
|
av_free(pes);
|
|
return 0;
|
|
}
|
|
return pes;
|
|
}
|
|
|
|
#define MAX_LEVEL 4
|
|
typedef struct MP4DescrParseContext {
|
|
AVFormatContext *s;
|
|
AVIOContext pb;
|
|
Mp4Descr *descr;
|
|
Mp4Descr *active_descr;
|
|
int descr_count;
|
|
int max_descr_count;
|
|
int level;
|
|
int predefined_SLConfigDescriptor_seen;
|
|
} MP4DescrParseContext;
|
|
|
|
static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
|
|
const uint8_t *buf, unsigned size,
|
|
Mp4Descr *descr, int max_descr_count)
|
|
{
|
|
int ret;
|
|
if (size > (1 << 30))
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
|
|
NULL, NULL, NULL, NULL)) < 0)
|
|
return ret;
|
|
|
|
d->s = s;
|
|
d->level = 0;
|
|
d->descr_count = 0;
|
|
d->descr = descr;
|
|
d->active_descr = NULL;
|
|
d->max_descr_count = max_descr_count;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
|
|
{
|
|
int64_t new_off = avio_tell(pb);
|
|
(*len) -= new_off - *off;
|
|
*off = new_off;
|
|
}
|
|
|
|
static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
|
|
int target_tag);
|
|
|
|
static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
|
|
{
|
|
while (len > 0) {
|
|
int ret = parse_mp4_descr(d, off, len, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
update_offsets(&d->pb, &off, &len);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
|
|
{
|
|
avio_rb16(&d->pb); // ID
|
|
avio_r8(&d->pb);
|
|
avio_r8(&d->pb);
|
|
avio_r8(&d->pb);
|
|
avio_r8(&d->pb);
|
|
avio_r8(&d->pb);
|
|
update_offsets(&d->pb, &off, &len);
|
|
return parse_mp4_descr_arr(d, off, len);
|
|
}
|
|
|
|
static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
|
|
{
|
|
int id_flags;
|
|
if (len < 2)
|
|
return 0;
|
|
id_flags = avio_rb16(&d->pb);
|
|
if (!(id_flags & 0x0020)) { // URL_Flag
|
|
update_offsets(&d->pb, &off, &len);
|
|
return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
|
|
{
|
|
int es_id = 0;
|
|
int ret = 0;
|
|
|
|
if (d->descr_count >= d->max_descr_count)
|
|
return AVERROR_INVALIDDATA;
|
|
ff_mp4_parse_es_descr(&d->pb, &es_id);
|
|
d->active_descr = d->descr + (d->descr_count++);
|
|
|
|
d->active_descr->es_id = es_id;
|
|
update_offsets(&d->pb, &off, &len);
|
|
if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
|
|
return ret;
|
|
update_offsets(&d->pb, &off, &len);
|
|
if (len > 0)
|
|
ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
|
|
d->active_descr = NULL;
|
|
return ret;
|
|
}
|
|
|
|
static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
|
|
int len)
|
|
{
|
|
Mp4Descr *descr = d->active_descr;
|
|
if (!descr)
|
|
return AVERROR_INVALIDDATA;
|
|
d->active_descr->dec_config_descr = av_malloc(len);
|
|
if (!descr->dec_config_descr)
|
|
return AVERROR(ENOMEM);
|
|
descr->dec_config_descr_len = len;
|
|
avio_read(&d->pb, descr->dec_config_descr, len);
|
|
return 0;
|
|
}
|
|
|
|
static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
|
|
{
|
|
Mp4Descr *descr = d->active_descr;
|
|
int predefined;
|
|
if (!descr)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
#define R8_CHECK_CLIP_MAX(dst, maxv) do { \
|
|
descr->sl.dst = avio_r8(&d->pb); \
|
|
if (descr->sl.dst > maxv) { \
|
|
descr->sl.dst = maxv; \
|
|
return AVERROR_INVALIDDATA; \
|
|
} \
|
|
} while (0)
|
|
|
|
predefined = avio_r8(&d->pb);
|
|
if (!predefined) {
|
|
int lengths;
|
|
int flags = avio_r8(&d->pb);
|
|
descr->sl.use_au_start = !!(flags & 0x80);
|
|
descr->sl.use_au_end = !!(flags & 0x40);
|
|
descr->sl.use_rand_acc_pt = !!(flags & 0x20);
|
|
descr->sl.use_padding = !!(flags & 0x08);
|
|
descr->sl.use_timestamps = !!(flags & 0x04);
|
|
descr->sl.use_idle = !!(flags & 0x02);
|
|
descr->sl.timestamp_res = avio_rb32(&d->pb);
|
|
avio_rb32(&d->pb);
|
|
R8_CHECK_CLIP_MAX(timestamp_len, 63);
|
|
R8_CHECK_CLIP_MAX(ocr_len, 63);
|
|
R8_CHECK_CLIP_MAX(au_len, 31);
|
|
descr->sl.inst_bitrate_len = avio_r8(&d->pb);
|
|
lengths = avio_rb16(&d->pb);
|
|
descr->sl.degr_prior_len = lengths >> 12;
|
|
descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
|
|
descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
|
|
} else if (!d->predefined_SLConfigDescriptor_seen){
|
|
avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
|
|
d->predefined_SLConfigDescriptor_seen = 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
|
|
int target_tag)
|
|
{
|
|
int tag;
|
|
int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
|
|
int ret = 0;
|
|
|
|
update_offsets(&d->pb, &off, &len);
|
|
if (len < 0 || len1 > len || len1 <= 0) {
|
|
av_log(d->s, AV_LOG_ERROR,
|
|
"Tag %x length violation new length %d bytes remaining %d\n",
|
|
tag, len1, len);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (d->level++ >= MAX_LEVEL) {
|
|
av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto done;
|
|
}
|
|
|
|
if (target_tag && tag != target_tag) {
|
|
av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
|
|
target_tag);
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto done;
|
|
}
|
|
|
|
switch (tag) {
|
|
case MP4IODescrTag:
|
|
ret = parse_MP4IODescrTag(d, off, len1);
|
|
break;
|
|
case MP4ODescrTag:
|
|
ret = parse_MP4ODescrTag(d, off, len1);
|
|
break;
|
|
case MP4ESDescrTag:
|
|
ret = parse_MP4ESDescrTag(d, off, len1);
|
|
break;
|
|
case MP4DecConfigDescrTag:
|
|
ret = parse_MP4DecConfigDescrTag(d, off, len1);
|
|
break;
|
|
case MP4SLDescrTag:
|
|
ret = parse_MP4SLDescrTag(d, off, len1);
|
|
break;
|
|
}
|
|
|
|
|
|
done:
|
|
d->level--;
|
|
avio_seek(&d->pb, off + len1, SEEK_SET);
|
|
return ret;
|
|
}
|
|
|
|
static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
|
|
Mp4Descr *descr, int *descr_count, int max_descr_count)
|
|
{
|
|
MP4DescrParseContext d;
|
|
int ret;
|
|
|
|
ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
|
|
|
|
*descr_count = d.descr_count;
|
|
return ret;
|
|
}
|
|
|
|
static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
|
|
Mp4Descr *descr, int *descr_count, int max_descr_count)
|
|
{
|
|
MP4DescrParseContext d;
|
|
int ret;
|
|
|
|
ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
|
|
|
|
*descr_count = d.descr_count;
|
|
return ret;
|
|
}
|
|
|
|
static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
|
|
int section_len)
|
|
{
|
|
MpegTSContext *ts = filter->u.section_filter.opaque;
|
|
MpegTSSectionFilter *tssf = &filter->u.section_filter;
|
|
SectionHeader h;
|
|
const uint8_t *p, *p_end;
|
|
AVIOContext pb;
|
|
int mp4_descr_count = 0;
|
|
Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
|
|
int i, pid;
|
|
AVFormatContext *s = ts->stream;
|
|
|
|
p_end = section + section_len - 4;
|
|
p = section;
|
|
if (parse_section_header(&h, &p, p_end) < 0)
|
|
return;
|
|
if (h.tid != M4OD_TID)
|
|
return;
|
|
if (skip_identical(&h, tssf))
|
|
return;
|
|
|
|
mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
|
|
MAX_MP4_DESCR_COUNT);
|
|
|
|
for (pid = 0; pid < NB_PID_MAX; pid++) {
|
|
if (!ts->pids[pid])
|
|
continue;
|
|
for (i = 0; i < mp4_descr_count; i++) {
|
|
PESContext *pes;
|
|
AVStream *st;
|
|
if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
|
|
continue;
|
|
if (ts->pids[pid]->type != MPEGTS_PES) {
|
|
av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
|
|
continue;
|
|
}
|
|
pes = ts->pids[pid]->u.pes_filter.opaque;
|
|
st = pes->st;
|
|
if (!st)
|
|
continue;
|
|
|
|
pes->sl = mp4_descr[i].sl;
|
|
|
|
ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
|
|
mp4_descr[i].dec_config_descr_len, 0,
|
|
NULL, NULL, NULL, NULL);
|
|
ff_mp4_read_dec_config_descr(s, st, &pb);
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
|
|
st->codecpar->extradata_size > 0)
|
|
st->need_parsing = 0;
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
|
|
st->codecpar->extradata_size > 0)
|
|
st->need_parsing = 0;
|
|
|
|
st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
|
|
st->internal->need_context_update = 1;
|
|
}
|
|
}
|
|
for (i = 0; i < mp4_descr_count; i++)
|
|
av_free(mp4_descr[i].dec_config_descr);
|
|
}
|
|
|
|
static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
|
|
int section_len)
|
|
{
|
|
AVProgram *prg = NULL;
|
|
MpegTSContext *ts = filter->u.section_filter.opaque;
|
|
|
|
int idx = ff_find_stream_index(ts->stream, filter->pid);
|
|
if (idx < 0)
|
|
return;
|
|
|
|
new_data_packet(section, section_len, ts->pkt);
|
|
ts->pkt->stream_index = idx;
|
|
prg = av_find_program_from_stream(ts->stream, NULL, idx);
|
|
if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
|
|
MpegTSFilter *f = ts->pids[prg->pcr_pid];
|
|
if (f && f->last_pcr != -1)
|
|
ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
|
|
}
|
|
ts->stop_parse = 1;
|
|
|
|
}
|
|
|
|
static const uint8_t opus_coupled_stream_cnt[9] = {
|
|
1, 0, 1, 1, 2, 2, 2, 3, 3
|
|
};
|
|
|
|
static const uint8_t opus_stream_cnt[9] = {
|
|
1, 1, 1, 2, 2, 3, 4, 4, 5,
|
|
};
|
|
|
|
static const uint8_t opus_channel_map[8][8] = {
|
|
{ 0 },
|
|
{ 0,1 },
|
|
{ 0,2,1 },
|
|
{ 0,1,2,3 },
|
|
{ 0,4,1,2,3 },
|
|
{ 0,4,1,2,3,5 },
|
|
{ 0,4,1,2,3,5,6 },
|
|
{ 0,6,1,2,3,4,5,7 },
|
|
};
|
|
|
|
int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
|
|
const uint8_t **pp, const uint8_t *desc_list_end,
|
|
Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
|
|
MpegTSContext *ts)
|
|
{
|
|
const uint8_t *desc_end;
|
|
int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
|
|
char language[252];
|
|
int i;
|
|
|
|
desc_tag = get8(pp, desc_list_end);
|
|
if (desc_tag < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
desc_len = get8(pp, desc_list_end);
|
|
if (desc_len < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
desc_end = *pp + desc_len;
|
|
if (desc_end > desc_list_end)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
|
|
|
|
if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
|
|
stream_type == STREAM_TYPE_PRIVATE_DATA)
|
|
mpegts_find_stream_type(st, desc_tag, DESC_types);
|
|
|
|
switch (desc_tag) {
|
|
case 0x02: /* video stream descriptor */
|
|
if (get8(pp, desc_end) & 0x1) {
|
|
st->disposition |= AV_DISPOSITION_STILL_IMAGE;
|
|
}
|
|
break;
|
|
case 0x1E: /* SL descriptor */
|
|
desc_es_id = get16(pp, desc_end);
|
|
if (desc_es_id < 0)
|
|
break;
|
|
if (ts && ts->pids[pid])
|
|
ts->pids[pid]->es_id = desc_es_id;
|
|
for (i = 0; i < mp4_descr_count; i++)
|
|
if (mp4_descr[i].dec_config_descr_len &&
|
|
mp4_descr[i].es_id == desc_es_id) {
|
|
AVIOContext pb;
|
|
ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
|
|
mp4_descr[i].dec_config_descr_len, 0,
|
|
NULL, NULL, NULL, NULL);
|
|
ff_mp4_read_dec_config_descr(fc, st, &pb);
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
|
|
st->codecpar->extradata_size > 0) {
|
|
st->need_parsing = 0;
|
|
st->internal->need_context_update = 1;
|
|
}
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
|
|
mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
|
|
}
|
|
break;
|
|
case 0x1F: /* FMC descriptor */
|
|
if (get16(pp, desc_end) < 0)
|
|
break;
|
|
if (mp4_descr_count > 0 &&
|
|
(st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
|
|
(st->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
|
|
st->request_probe > 0) &&
|
|
mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
|
|
AVIOContext pb;
|
|
ffio_init_context(&pb, mp4_descr->dec_config_descr,
|
|
mp4_descr->dec_config_descr_len, 0,
|
|
NULL, NULL, NULL, NULL);
|
|
ff_mp4_read_dec_config_descr(fc, st, &pb);
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
|
|
st->codecpar->extradata_size > 0) {
|
|
st->request_probe = st->need_parsing = 0;
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->internal->need_context_update = 1;
|
|
}
|
|
}
|
|
break;
|
|
case 0x56: /* DVB teletext descriptor */
|
|
{
|
|
uint8_t *extradata = NULL;
|
|
int language_count = desc_len / 5;
|
|
|
|
if (desc_len > 0 && desc_len % 5 != 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if (language_count > 0) {
|
|
/* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
|
|
av_assert0(language_count <= sizeof(language) / 4);
|
|
|
|
if (st->codecpar->extradata == NULL) {
|
|
if (ff_alloc_extradata(st->codecpar, language_count * 2)) {
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
}
|
|
|
|
if (st->codecpar->extradata_size < language_count * 2)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
extradata = st->codecpar->extradata;
|
|
|
|
for (i = 0; i < language_count; i++) {
|
|
language[i * 4 + 0] = get8(pp, desc_end);
|
|
language[i * 4 + 1] = get8(pp, desc_end);
|
|
language[i * 4 + 2] = get8(pp, desc_end);
|
|
language[i * 4 + 3] = ',';
|
|
|
|
memcpy(extradata, *pp, 2);
|
|
extradata += 2;
|
|
|
|
*pp += 2;
|
|
}
|
|
|
|
language[i * 4 - 1] = 0;
|
|
av_dict_set(&st->metadata, "language", language, 0);
|
|
st->internal->need_context_update = 1;
|
|
}
|
|
}
|
|
break;
|
|
case 0x59: /* subtitling descriptor */
|
|
{
|
|
/* 8 bytes per DVB subtitle substream data:
|
|
* ISO_639_language_code (3 bytes),
|
|
* subtitling_type (1 byte),
|
|
* composition_page_id (2 bytes),
|
|
* ancillary_page_id (2 bytes) */
|
|
int language_count = desc_len / 8;
|
|
|
|
if (desc_len > 0 && desc_len % 8 != 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if (language_count > 1) {
|
|
avpriv_request_sample(fc, "DVB subtitles with multiple languages");
|
|
}
|
|
|
|
if (language_count > 0) {
|
|
uint8_t *extradata;
|
|
|
|
/* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
|
|
av_assert0(language_count <= sizeof(language) / 4);
|
|
|
|
if (st->codecpar->extradata == NULL) {
|
|
if (ff_alloc_extradata(st->codecpar, language_count * 5)) {
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
}
|
|
|
|
if (st->codecpar->extradata_size < language_count * 5)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
extradata = st->codecpar->extradata;
|
|
|
|
for (i = 0; i < language_count; i++) {
|
|
language[i * 4 + 0] = get8(pp, desc_end);
|
|
language[i * 4 + 1] = get8(pp, desc_end);
|
|
language[i * 4 + 2] = get8(pp, desc_end);
|
|
language[i * 4 + 3] = ',';
|
|
|
|
/* hearing impaired subtitles detection using subtitling_type */
|
|
switch (*pp[0]) {
|
|
case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
|
|
case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
|
|
case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
|
|
case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
|
|
case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
|
|
case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
|
|
st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
|
|
break;
|
|
}
|
|
|
|
extradata[4] = get8(pp, desc_end); /* subtitling_type */
|
|
memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
|
|
extradata += 5;
|
|
|
|
*pp += 4;
|
|
}
|
|
|
|
language[i * 4 - 1] = 0;
|
|
av_dict_set(&st->metadata, "language", language, 0);
|
|
st->internal->need_context_update = 1;
|
|
}
|
|
}
|
|
break;
|
|
case 0x0a: /* ISO 639 language descriptor */
|
|
for (i = 0; i + 4 <= desc_len; i += 4) {
|
|
language[i + 0] = get8(pp, desc_end);
|
|
language[i + 1] = get8(pp, desc_end);
|
|
language[i + 2] = get8(pp, desc_end);
|
|
language[i + 3] = ',';
|
|
switch (get8(pp, desc_end)) {
|
|
case 0x01:
|
|
st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
|
|
break;
|
|
case 0x02:
|
|
st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
|
|
break;
|
|
case 0x03:
|
|
st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
|
|
st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
|
|
break;
|
|
}
|
|
}
|
|
if (i && language[0]) {
|
|
language[i - 1] = 0;
|
|
/* don't overwrite language, as it may already have been set by
|
|
* another, more specific descriptor (e.g. supplementary audio) */
|
|
av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
|
|
}
|
|
break;
|
|
case 0x05: /* registration descriptor */
|
|
st->codecpar->codec_tag = bytestream_get_le32(pp);
|
|
av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) {
|
|
mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
|
|
if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
|
|
st->request_probe = 50;
|
|
}
|
|
break;
|
|
case 0x52: /* stream identifier descriptor */
|
|
st->stream_identifier = 1 + get8(pp, desc_end);
|
|
break;
|
|
case 0x26: /* metadata descriptor */
|
|
if (get16(pp, desc_end) == 0xFFFF)
|
|
*pp += 4;
|
|
if (get8(pp, desc_end) == 0xFF) {
|
|
st->codecpar->codec_tag = bytestream_get_le32(pp);
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
|
|
mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
|
|
}
|
|
break;
|
|
case 0x7f: /* DVB extension descriptor */
|
|
ext_desc_tag = get8(pp, desc_end);
|
|
if (ext_desc_tag < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
|
|
ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
|
|
if (!st->codecpar->extradata) {
|
|
st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
|
|
AV_INPUT_BUFFER_PADDING_SIZE);
|
|
if (!st->codecpar->extradata)
|
|
return AVERROR(ENOMEM);
|
|
|
|
st->codecpar->extradata_size = sizeof(opus_default_extradata);
|
|
memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
|
|
|
|
channel_config_code = get8(pp, desc_end);
|
|
if (channel_config_code < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
if (channel_config_code <= 0x8) {
|
|
st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
|
|
st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
|
|
st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
|
|
st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
|
|
memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
|
|
} else {
|
|
avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
|
|
}
|
|
st->need_parsing = AVSTREAM_PARSE_FULL;
|
|
st->internal->need_context_update = 1;
|
|
}
|
|
}
|
|
if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
|
|
int flags;
|
|
|
|
if (desc_len < 1)
|
|
return AVERROR_INVALIDDATA;
|
|
flags = get8(pp, desc_end);
|
|
|
|
if ((flags & 0x80) == 0) /* mix_type */
|
|
st->disposition |= AV_DISPOSITION_DEPENDENT;
|
|
|
|
switch ((flags >> 2) & 0x1F) { /* editorial_classification */
|
|
case 0x01:
|
|
st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
|
|
st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
|
|
break;
|
|
case 0x02:
|
|
st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
|
|
break;
|
|
case 0x03:
|
|
st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
|
|
break;
|
|
}
|
|
|
|
if (flags & 0x01) { /* language_code_present */
|
|
if (desc_len < 4)
|
|
return AVERROR_INVALIDDATA;
|
|
language[0] = get8(pp, desc_end);
|
|
language[1] = get8(pp, desc_end);
|
|
language[2] = get8(pp, desc_end);
|
|
language[3] = 0;
|
|
|
|
/* This language always has to override a possible
|
|
* ISO 639 language descriptor language */
|
|
if (language[0])
|
|
av_dict_set(&st->metadata, "language", language, 0);
|
|
}
|
|
}
|
|
break;
|
|
case 0x6a: /* ac-3_descriptor */
|
|
{
|
|
int component_type_flag = get8(pp, desc_end) & (1 << 7);
|
|
if (component_type_flag) {
|
|
int component_type = get8(pp, desc_end);
|
|
int service_type_mask = 0x38; // 0b00111000
|
|
int service_type = ((component_type & service_type_mask) >> 3);
|
|
if (service_type == 0x02 /* 0b010 */) {
|
|
st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
|
|
av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case 0x7a: /* enhanced_ac-3_descriptor */
|
|
{
|
|
int component_type_flag = get8(pp, desc_end) & (1 << 7);
|
|
if (component_type_flag) {
|
|
int component_type = get8(pp, desc_end);
|
|
int service_type_mask = 0x38; // 0b00111000
|
|
int service_type = ((component_type & service_type_mask) >> 3);
|
|
if (service_type == 0x02 /* 0b010 */) {
|
|
st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
|
|
av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case 0xfd: /* ARIB data coding type descriptor */
|
|
// STD-B24, fascicle 3, chapter 4 defines private_stream_1
|
|
// for captions
|
|
if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
|
|
// This structure is defined in STD-B10, part 1, listing 5.4 and
|
|
// part 2, 6.2.20).
|
|
// Listing of data_component_ids is in STD-B10, part 2, Annex J.
|
|
// Component tag limits are documented in TR-B14, fascicle 2,
|
|
// Vol. 3, Section 2, 4.2.8.1
|
|
int actual_component_tag = st->stream_identifier - 1;
|
|
int picked_profile = FF_PROFILE_UNKNOWN;
|
|
int data_component_id = get16(pp, desc_end);
|
|
if (data_component_id < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
switch (data_component_id) {
|
|
case 0x0008:
|
|
// [0x30..0x37] are component tags utilized for
|
|
// non-mobile captioning service ("profile A").
|
|
if (actual_component_tag >= 0x30 &&
|
|
actual_component_tag <= 0x37) {
|
|
picked_profile = FF_PROFILE_ARIB_PROFILE_A;
|
|
}
|
|
break;
|
|
case 0x0012:
|
|
// component tag 0x87 signifies a mobile/partial reception
|
|
// (1seg) captioning service ("profile C").
|
|
if (actual_component_tag == 0x87) {
|
|
picked_profile = FF_PROFILE_ARIB_PROFILE_C;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (picked_profile == FF_PROFILE_UNKNOWN)
|
|
break;
|
|
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
|
|
st->codecpar->codec_id = AV_CODEC_ID_ARIB_CAPTION;
|
|
st->codecpar->profile = picked_profile;
|
|
st->request_probe = 0;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
*pp = desc_end;
|
|
return 0;
|
|
}
|
|
|
|
static AVStream *find_matching_stream(MpegTSContext *ts, int pid,
|
|
int stream_identifier, int pmt_stream_idx)
|
|
{
|
|
AVFormatContext *s = ts->stream;
|
|
int i;
|
|
AVStream *found = NULL;
|
|
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
AVStream *st = s->streams[i];
|
|
if (stream_identifier != -1) { /* match based on "stream identifier descriptor" if present */
|
|
if (st->stream_identifier == stream_identifier+1) {
|
|
found = st;
|
|
break;
|
|
}
|
|
} else if (st->pmt_stream_idx == pmt_stream_idx) { /* match based on position within the PMT */
|
|
found = st;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (found) {
|
|
av_log(ts->stream, AV_LOG_VERBOSE,
|
|
"re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
|
|
av_get_media_type_string(found->codecpar->codec_type),
|
|
i, found->id, pid);
|
|
}
|
|
|
|
return found;
|
|
}
|
|
|
|
static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
|
|
{
|
|
const uint8_t **pp = &p;
|
|
const uint8_t *desc_list_end;
|
|
const uint8_t *desc_end;
|
|
int desc_list_len;
|
|
int desc_len, desc_tag;
|
|
|
|
desc_list_len = get16(pp, p_end);
|
|
if (desc_list_len < 0)
|
|
return -1;
|
|
desc_list_len &= 0xfff;
|
|
desc_list_end = p + desc_list_len;
|
|
if (desc_list_end > p_end)
|
|
return -1;
|
|
|
|
while (1) {
|
|
desc_tag = get8(pp, desc_list_end);
|
|
if (desc_tag < 0)
|
|
return -1;
|
|
desc_len = get8(pp, desc_list_end);
|
|
if (desc_len < 0)
|
|
return -1;
|
|
desc_end = *pp + desc_len;
|
|
if (desc_end > desc_list_end)
|
|
return -1;
|
|
|
|
if (desc_tag == 0x52) {
|
|
return get8(pp, desc_end);
|
|
}
|
|
*pp = desc_end;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
|
|
{
|
|
return !(stream_type == 0x13 ||
|
|
(stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
|
|
}
|
|
|
|
static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
|
|
{
|
|
MpegTSContext *ts = filter->u.section_filter.opaque;
|
|
MpegTSSectionFilter *tssf = &filter->u.section_filter;
|
|
SectionHeader h1, *h = &h1;
|
|
PESContext *pes;
|
|
AVStream *st;
|
|
const uint8_t *p, *p_end, *desc_list_end;
|
|
int program_info_length, pcr_pid, pid, stream_type;
|
|
int desc_list_len;
|
|
uint32_t prog_reg_desc = 0; /* registration descriptor */
|
|
int stream_identifier = -1;
|
|
|
|
int mp4_descr_count = 0;
|
|
Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
|
|
int i;
|
|
|
|
av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
|
|
hex_dump_debug(ts->stream, section, section_len);
|
|
|
|
p_end = section + section_len - 4;
|
|
p = section;
|
|
if (parse_section_header(h, &p, p_end) < 0)
|
|
return;
|
|
if (h->tid != PMT_TID)
|
|
return;
|
|
if (skip_identical(h, tssf))
|
|
return;
|
|
|
|
av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
|
|
h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
|
|
|
|
if (!ts->scan_all_pmts && ts->skip_changes)
|
|
return;
|
|
|
|
if (ts->skip_unknown_pmt && !get_program(ts, h->id))
|
|
return;
|
|
if (!ts->skip_clear)
|
|
clear_program(ts, h->id);
|
|
|
|
pcr_pid = get16(&p, p_end);
|
|
if (pcr_pid < 0)
|
|
return;
|
|
pcr_pid &= 0x1fff;
|
|
add_pid_to_pmt(ts, h->id, pcr_pid);
|
|
update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
|
|
|
|
av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
|
|
|
|
program_info_length = get16(&p, p_end);
|
|
if (program_info_length < 0)
|
|
return;
|
|
program_info_length &= 0xfff;
|
|
while (program_info_length >= 2) {
|
|
uint8_t tag, len;
|
|
tag = get8(&p, p_end);
|
|
len = get8(&p, p_end);
|
|
|
|
av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
|
|
|
|
if (len > program_info_length - 2)
|
|
// something else is broken, exit the program_descriptors_loop
|
|
break;
|
|
program_info_length -= len + 2;
|
|
if (tag == 0x1d) { // IOD descriptor
|
|
get8(&p, p_end); // scope
|
|
get8(&p, p_end); // label
|
|
len -= 2;
|
|
mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
|
|
&mp4_descr_count, MAX_MP4_DESCR_COUNT);
|
|
} else if (tag == 0x05 && len >= 4) { // registration descriptor
|
|
prog_reg_desc = bytestream_get_le32(&p);
|
|
len -= 4;
|
|
}
|
|
p += len;
|
|
}
|
|
p += program_info_length;
|
|
if (p >= p_end)
|
|
goto out;
|
|
|
|
// stop parsing after pmt, we found header
|
|
if (!ts->stream->nb_streams)
|
|
ts->stop_parse = 2;
|
|
|
|
set_pmt_found(ts, h->id);
|
|
|
|
|
|
for (i = 0; ; i++) {
|
|
st = 0;
|
|
pes = NULL;
|
|
stream_type = get8(&p, p_end);
|
|
if (stream_type < 0)
|
|
break;
|
|
pid = get16(&p, p_end);
|
|
if (pid < 0)
|
|
goto out;
|
|
pid &= 0x1fff;
|
|
if (pid == ts->current_pid)
|
|
goto out;
|
|
|
|
if (ts->merge_pmt_versions)
|
|
stream_identifier = parse_stream_identifier_desc(p, p_end);
|
|
|
|
/* now create stream */
|
|
if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
|
|
pes = ts->pids[pid]->u.pes_filter.opaque;
|
|
if (ts->merge_pmt_versions && !pes->st) {
|
|
st = find_matching_stream(ts, pid, stream_identifier, i);
|
|
if (st) {
|
|
pes->st = st;
|
|
pes->stream_type = stream_type;
|
|
pes->merged_st = 1;
|
|
}
|
|
}
|
|
if (!pes->st) {
|
|
pes->st = avformat_new_stream(pes->stream, NULL);
|
|
if (!pes->st)
|
|
goto out;
|
|
pes->st->id = pes->pid;
|
|
pes->st->program_num = h->id;
|
|
pes->st->pmt_version = h->version;
|
|
pes->st->pmt_stream_idx = i;
|
|
}
|
|
st = pes->st;
|
|
} else if (is_pes_stream(stream_type, prog_reg_desc)) {
|
|
if (ts->pids[pid])
|
|
mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
|
|
pes = add_pes_stream(ts, pid, pcr_pid);
|
|
if (ts->merge_pmt_versions && pes && !pes->st) {
|
|
st = find_matching_stream(ts, pid, stream_identifier, i);
|
|
if (st) {
|
|
pes->st = st;
|
|
pes->stream_type = stream_type;
|
|
pes->merged_st = 1;
|
|
}
|
|
}
|
|
if (pes && !pes->st) {
|
|
st = avformat_new_stream(pes->stream, NULL);
|
|
if (!st)
|
|
goto out;
|
|
st->id = pes->pid;
|
|
st->program_num = h->id;
|
|
st->pmt_version = h->version;
|
|
st->pmt_stream_idx = i;
|
|
}
|
|
} else {
|
|
int idx = ff_find_stream_index(ts->stream, pid);
|
|
if (idx >= 0) {
|
|
st = ts->stream->streams[idx];
|
|
}
|
|
if (ts->merge_pmt_versions && !st) {
|
|
st = find_matching_stream(ts, pid, stream_identifier, i);
|
|
}
|
|
if (!st) {
|
|
st = avformat_new_stream(ts->stream, NULL);
|
|
if (!st)
|
|
goto out;
|
|
st->id = pid;
|
|
st->program_num = h->id;
|
|
st->pmt_version = h->version;
|
|
st->pmt_stream_idx = i;
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
|
|
if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
|
|
mpegts_find_stream_type(st, stream_type, SCTE_types);
|
|
mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!st)
|
|
goto out;
|
|
|
|
if (pes && !pes->stream_type)
|
|
mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
|
|
|
|
add_pid_to_pmt(ts, h->id, pid);
|
|
|
|
av_program_add_stream_index(ts->stream, h->id, st->index);
|
|
|
|
desc_list_len = get16(&p, p_end);
|
|
if (desc_list_len < 0)
|
|
goto out;
|
|
desc_list_len &= 0xfff;
|
|
desc_list_end = p + desc_list_len;
|
|
if (desc_list_end > p_end)
|
|
goto out;
|
|
for (;;) {
|
|
if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
|
|
desc_list_end, mp4_descr,
|
|
mp4_descr_count, pid, ts) < 0)
|
|
break;
|
|
|
|
if (pes && prog_reg_desc == AV_RL32("HDMV") &&
|
|
stream_type == 0x83 && pes->sub_st) {
|
|
av_program_add_stream_index(ts->stream, h->id,
|
|
pes->sub_st->index);
|
|
pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
|
|
}
|
|
}
|
|
p = desc_list_end;
|
|
}
|
|
|
|
if (!ts->pids[pcr_pid])
|
|
mpegts_open_pcr_filter(ts, pcr_pid);
|
|
|
|
out:
|
|
for (i = 0; i < mp4_descr_count; i++)
|
|
av_free(mp4_descr[i].dec_config_descr);
|
|
}
|
|
|
|
static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
|
|
{
|
|
MpegTSContext *ts = filter->u.section_filter.opaque;
|
|
MpegTSSectionFilter *tssf = &filter->u.section_filter;
|
|
SectionHeader h1, *h = &h1;
|
|
const uint8_t *p, *p_end;
|
|
int sid, pmt_pid;
|
|
AVProgram *program;
|
|
|
|
av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
|
|
hex_dump_debug(ts->stream, section, section_len);
|
|
|
|
p_end = section + section_len - 4;
|
|
p = section;
|
|
if (parse_section_header(h, &p, p_end) < 0)
|
|
return;
|
|
if (h->tid != PAT_TID)
|
|
return;
|
|
if (ts->skip_changes)
|
|
return;
|
|
|
|
if (skip_identical(h, tssf))
|
|
return;
|
|
ts->stream->ts_id = h->id;
|
|
|
|
clear_programs(ts);
|
|
for (;;) {
|
|
sid = get16(&p, p_end);
|
|
if (sid < 0)
|
|
break;
|
|
pmt_pid = get16(&p, p_end);
|
|
if (pmt_pid < 0)
|
|
break;
|
|
pmt_pid &= 0x1fff;
|
|
|
|
if (pmt_pid == ts->current_pid)
|
|
break;
|
|
|
|
av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
|
|
|
|
if (sid == 0x0000) {
|
|
/* NIT info */
|
|
} else {
|
|
MpegTSFilter *fil = ts->pids[pmt_pid];
|
|
program = av_new_program(ts->stream, sid);
|
|
if (program) {
|
|
program->program_num = sid;
|
|
program->pmt_pid = pmt_pid;
|
|
}
|
|
if (fil)
|
|
if ( fil->type != MPEGTS_SECTION
|
|
|| fil->pid != pmt_pid
|
|
|| fil->u.section_filter.section_cb != pmt_cb)
|
|
mpegts_close_filter(ts, ts->pids[pmt_pid]);
|
|
|
|
if (!ts->pids[pmt_pid])
|
|
mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
|
|
add_pat_entry(ts, sid);
|
|
add_pid_to_pmt(ts, sid, 0); // add pat pid to program
|
|
add_pid_to_pmt(ts, sid, pmt_pid);
|
|
}
|
|
}
|
|
|
|
if (sid < 0) {
|
|
int i,j;
|
|
for (j=0; j<ts->stream->nb_programs; j++) {
|
|
for (i = 0; i < ts->nb_prg; i++)
|
|
if (ts->prg[i].id == ts->stream->programs[j]->id)
|
|
break;
|
|
if (i==ts->nb_prg && !ts->skip_clear)
|
|
clear_avprogram(ts, ts->stream->programs[j]->id);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
|
|
{
|
|
MpegTSContext *ts = filter->u.section_filter.opaque;
|
|
MpegTSSectionFilter *tssf = &filter->u.section_filter;
|
|
SectionHeader h1, *h = &h1;
|
|
const uint8_t *p, *p_end, *desc_list_end, *desc_end;
|
|
int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
|
|
char *name, *provider_name;
|
|
|
|
av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
|
|
hex_dump_debug(ts->stream, section, section_len);
|
|
|
|
p_end = section + section_len - 4;
|
|
p = section;
|
|
if (parse_section_header(h, &p, p_end) < 0)
|
|
return;
|
|
if (h->tid != SDT_TID)
|
|
return;
|
|
if (ts->skip_changes)
|
|
return;
|
|
if (skip_identical(h, tssf))
|
|
return;
|
|
|
|
onid = get16(&p, p_end);
|
|
if (onid < 0)
|
|
return;
|
|
val = get8(&p, p_end);
|
|
if (val < 0)
|
|
return;
|
|
for (;;) {
|
|
sid = get16(&p, p_end);
|
|
if (sid < 0)
|
|
break;
|
|
val = get8(&p, p_end);
|
|
if (val < 0)
|
|
break;
|
|
desc_list_len = get16(&p, p_end);
|
|
if (desc_list_len < 0)
|
|
break;
|
|
desc_list_len &= 0xfff;
|
|
desc_list_end = p + desc_list_len;
|
|
if (desc_list_end > p_end)
|
|
break;
|
|
for (;;) {
|
|
desc_tag = get8(&p, desc_list_end);
|
|
if (desc_tag < 0)
|
|
break;
|
|
desc_len = get8(&p, desc_list_end);
|
|
desc_end = p + desc_len;
|
|
if (desc_len < 0 || desc_end > desc_list_end)
|
|
break;
|
|
|
|
av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
|
|
desc_tag, desc_len);
|
|
|
|
switch (desc_tag) {
|
|
case 0x48:
|
|
service_type = get8(&p, p_end);
|
|
if (service_type < 0)
|
|
break;
|
|
provider_name = getstr8(&p, p_end);
|
|
if (!provider_name)
|
|
break;
|
|
name = getstr8(&p, p_end);
|
|
if (name) {
|
|
AVProgram *program = av_new_program(ts->stream, sid);
|
|
if (program) {
|
|
av_dict_set(&program->metadata, "service_name", name, 0);
|
|
av_dict_set(&program->metadata, "service_provider",
|
|
provider_name, 0);
|
|
}
|
|
}
|
|
av_free(name);
|
|
av_free(provider_name);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
p = desc_end;
|
|
}
|
|
p = desc_list_end;
|
|
}
|
|
}
|
|
|
|
static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
|
|
const uint8_t *packet);
|
|
|
|
/* handle one TS packet */
|
|
static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
|
|
{
|
|
MpegTSFilter *tss;
|
|
int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
|
|
has_adaptation, has_payload;
|
|
const uint8_t *p, *p_end;
|
|
int64_t pos;
|
|
|
|
pid = AV_RB16(packet + 1) & 0x1fff;
|
|
is_start = packet[1] & 0x40;
|
|
tss = ts->pids[pid];
|
|
if (ts->auto_guess && !tss && is_start) {
|
|
add_pes_stream(ts, pid, -1);
|
|
tss = ts->pids[pid];
|
|
}
|
|
if (!tss)
|
|
return 0;
|
|
if (is_start)
|
|
tss->discard = discard_pid(ts, pid);
|
|
if (tss->discard)
|
|
return 0;
|
|
ts->current_pid = pid;
|
|
|
|
afc = (packet[3] >> 4) & 3;
|
|
if (afc == 0) /* reserved value */
|
|
return 0;
|
|
has_adaptation = afc & 2;
|
|
has_payload = afc & 1;
|
|
is_discontinuity = has_adaptation &&
|
|
packet[4] != 0 && /* with length > 0 */
|
|
(packet[5] & 0x80); /* and discontinuity indicated */
|
|
|
|
/* continuity check (currently not used) */
|
|
cc = (packet[3] & 0xf);
|
|
expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
|
|
cc_ok = pid == 0x1FFF || // null packet PID
|
|
is_discontinuity ||
|
|
tss->last_cc < 0 ||
|
|
expected_cc == cc;
|
|
|
|
tss->last_cc = cc;
|
|
if (!cc_ok) {
|
|
av_log(ts->stream, AV_LOG_DEBUG,
|
|
"Continuity check failed for pid %d expected %d got %d\n",
|
|
pid, expected_cc, cc);
|
|
if (tss->type == MPEGTS_PES) {
|
|
PESContext *pc = tss->u.pes_filter.opaque;
|
|
pc->flags |= AV_PKT_FLAG_CORRUPT;
|
|
}
|
|
}
|
|
|
|
if (packet[1] & 0x80) {
|
|
av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
|
|
if (tss->type == MPEGTS_PES) {
|
|
PESContext *pc = tss->u.pes_filter.opaque;
|
|
pc->flags |= AV_PKT_FLAG_CORRUPT;
|
|
}
|
|
}
|
|
|
|
p = packet + 4;
|
|
if (has_adaptation) {
|
|
int64_t pcr_h;
|
|
int pcr_l;
|
|
if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
|
|
tss->last_pcr = pcr_h * 300 + pcr_l;
|
|
/* skip adaptation field */
|
|
p += p[0] + 1;
|
|
}
|
|
/* if past the end of packet, ignore */
|
|
p_end = packet + TS_PACKET_SIZE;
|
|
if (p >= p_end || !has_payload)
|
|
return 0;
|
|
|
|
pos = avio_tell(ts->stream->pb);
|
|
if (pos >= 0) {
|
|
av_assert0(pos >= TS_PACKET_SIZE);
|
|
ts->pos47_full = pos - TS_PACKET_SIZE;
|
|
}
|
|
|
|
if (tss->type == MPEGTS_SECTION) {
|
|
if (is_start) {
|
|
/* pointer field present */
|
|
len = *p++;
|
|
if (len > p_end - p)
|
|
return 0;
|
|
if (len && cc_ok) {
|
|
/* write remaining section bytes */
|
|
write_section_data(ts, tss,
|
|
p, len, 0);
|
|
/* check whether filter has been closed */
|
|
if (!ts->pids[pid])
|
|
return 0;
|
|
}
|
|
p += len;
|
|
if (p < p_end) {
|
|
write_section_data(ts, tss,
|
|
p, p_end - p, 1);
|
|
}
|
|
} else {
|
|
if (cc_ok) {
|
|
write_section_data(ts, tss,
|
|
p, p_end - p, 0);
|
|
}
|
|
}
|
|
|
|
// stop find_stream_info from waiting for more streams
|
|
// when all programs have received a PMT
|
|
if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
|
|
int i;
|
|
for (i = 0; i < ts->nb_prg; i++) {
|
|
if (!ts->prg[i].pmt_found)
|
|
break;
|
|
}
|
|
if (i == ts->nb_prg && ts->nb_prg > 0) {
|
|
int types = 0;
|
|
for (i = 0; i < ts->stream->nb_streams; i++) {
|
|
AVStream *st = ts->stream->streams[i];
|
|
if (st->codecpar->codec_type >= 0)
|
|
types |= 1<<st->codecpar->codec_type;
|
|
}
|
|
if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
|
|
av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
|
|
ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
|
|
}
|
|
}
|
|
}
|
|
|
|
} else {
|
|
int ret;
|
|
// Note: The position here points actually behind the current packet.
|
|
if (tss->type == MPEGTS_PES) {
|
|
if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
|
|
pos - ts->raw_packet_size)) < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void reanalyze(MpegTSContext *ts) {
|
|
AVIOContext *pb = ts->stream->pb;
|
|
int64_t pos = avio_tell(pb);
|
|
if (pos < 0)
|
|
return;
|
|
pos -= ts->pos47_full;
|
|
if (pos == TS_PACKET_SIZE) {
|
|
ts->size_stat[0] ++;
|
|
} else if (pos == TS_DVHS_PACKET_SIZE) {
|
|
ts->size_stat[1] ++;
|
|
} else if (pos == TS_FEC_PACKET_SIZE) {
|
|
ts->size_stat[2] ++;
|
|
}
|
|
|
|
ts->size_stat_count ++;
|
|
if (ts->size_stat_count > SIZE_STAT_THRESHOLD) {
|
|
int newsize = 0;
|
|
if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
|
|
newsize = TS_PACKET_SIZE;
|
|
} else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
|
|
newsize = TS_DVHS_PACKET_SIZE;
|
|
} else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
|
|
newsize = TS_FEC_PACKET_SIZE;
|
|
}
|
|
if (newsize && newsize != ts->raw_packet_size) {
|
|
av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
|
|
ts->raw_packet_size = newsize;
|
|
}
|
|
ts->size_stat_count = 0;
|
|
memset(ts->size_stat, 0, sizeof(ts->size_stat));
|
|
}
|
|
}
|
|
|
|
/* XXX: try to find a better synchro over several packets (use
|
|
* get_packet_size() ?) */
|
|
static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
|
|
{
|
|
MpegTSContext *ts = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
int c, i;
|
|
uint64_t pos = avio_tell(pb);
|
|
|
|
avio_seek(pb, -FFMIN(seekback, pos), SEEK_CUR);
|
|
|
|
//Special case for files like 01c56b0dc1.ts
|
|
if (current_packet[0] == 0x80 && current_packet[12] == 0x47) {
|
|
avio_seek(pb, 12, SEEK_CUR);
|
|
return 0;
|
|
}
|
|
|
|
for (i = 0; i < ts->resync_size; i++) {
|
|
c = avio_r8(pb);
|
|
if (avio_feof(pb))
|
|
return AVERROR_EOF;
|
|
if (c == 0x47) {
|
|
avio_seek(pb, -1, SEEK_CUR);
|
|
reanalyze(s->priv_data);
|
|
return 0;
|
|
}
|
|
}
|
|
av_log(s, AV_LOG_ERROR,
|
|
"max resync size reached, could not find sync byte\n");
|
|
/* no sync found */
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
/* return AVERROR_something if error or EOF. Return 0 if OK. */
|
|
static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
|
|
const uint8_t **data)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
int len;
|
|
|
|
for (;;) {
|
|
len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
|
|
if (len != TS_PACKET_SIZE)
|
|
return len < 0 ? len : AVERROR_EOF;
|
|
/* check packet sync byte */
|
|
if ((*data)[0] != 0x47) {
|
|
/* find a new packet start */
|
|
|
|
if (mpegts_resync(s, raw_packet_size, *data) < 0)
|
|
return AVERROR(EAGAIN);
|
|
else
|
|
continue;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
int skip = raw_packet_size - TS_PACKET_SIZE;
|
|
if (skip > 0)
|
|
avio_skip(pb, skip);
|
|
}
|
|
|
|
static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
|
|
{
|
|
AVFormatContext *s = ts->stream;
|
|
uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
|
|
const uint8_t *data;
|
|
int64_t packet_num;
|
|
int ret = 0;
|
|
|
|
if (avio_tell(s->pb) != ts->last_pos) {
|
|
int i;
|
|
av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
|
|
/* seek detected, flush pes buffer */
|
|
for (i = 0; i < NB_PID_MAX; i++) {
|
|
if (ts->pids[i]) {
|
|
if (ts->pids[i]->type == MPEGTS_PES) {
|
|
PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
|
|
av_buffer_unref(&pes->buffer);
|
|
pes->data_index = 0;
|
|
pes->state = MPEGTS_SKIP; /* skip until pes header */
|
|
} else if (ts->pids[i]->type == MPEGTS_SECTION) {
|
|
ts->pids[i]->u.section_filter.last_ver = -1;
|
|
}
|
|
ts->pids[i]->last_cc = -1;
|
|
ts->pids[i]->last_pcr = -1;
|
|
}
|
|
}
|
|
}
|
|
|
|
ts->stop_parse = 0;
|
|
packet_num = 0;
|
|
memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
|
|
for (;;) {
|
|
packet_num++;
|
|
if (nb_packets != 0 && packet_num >= nb_packets ||
|
|
ts->stop_parse > 1) {
|
|
ret = AVERROR(EAGAIN);
|
|
break;
|
|
}
|
|
if (ts->stop_parse > 0)
|
|
break;
|
|
|
|
ret = read_packet(s, packet, ts->raw_packet_size, &data);
|
|
if (ret != 0)
|
|
break;
|
|
ret = handle_packet(ts, data);
|
|
finished_reading_packet(s, ts->raw_packet_size);
|
|
if (ret != 0)
|
|
break;
|
|
}
|
|
ts->last_pos = avio_tell(s->pb);
|
|
return ret;
|
|
}
|
|
|
|
static int mpegts_probe(const AVProbeData *p)
|
|
{
|
|
const int size = p->buf_size;
|
|
int maxscore = 0;
|
|
int sumscore = 0;
|
|
int i;
|
|
int check_count = size / TS_FEC_PACKET_SIZE;
|
|
#define CHECK_COUNT 10
|
|
#define CHECK_BLOCK 100
|
|
|
|
if (!check_count)
|
|
return 0;
|
|
|
|
for (i = 0; i<check_count; i+=CHECK_BLOCK) {
|
|
int left = FFMIN(check_count - i, CHECK_BLOCK);
|
|
int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
|
|
int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
|
|
int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
|
|
score = FFMAX3(score, dvhs_score, fec_score);
|
|
sumscore += score;
|
|
maxscore = FFMAX(maxscore, score);
|
|
}
|
|
|
|
sumscore = sumscore * CHECK_COUNT / check_count;
|
|
maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
|
|
|
|
ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
|
|
|
|
if (check_count > CHECK_COUNT && sumscore > 6) {
|
|
return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
|
|
} else if (check_count >= CHECK_COUNT && sumscore > 6) {
|
|
return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
|
|
} else if (check_count >= CHECK_COUNT && maxscore > 6) {
|
|
return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
|
|
} else if (sumscore > 6) {
|
|
return 2;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* return the 90kHz PCR and the extension for the 27MHz PCR. return
|
|
* (-1) if not available */
|
|
static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
|
|
{
|
|
int afc, len, flags;
|
|
const uint8_t *p;
|
|
unsigned int v;
|
|
|
|
afc = (packet[3] >> 4) & 3;
|
|
if (afc <= 1)
|
|
return AVERROR_INVALIDDATA;
|
|
p = packet + 4;
|
|
len = p[0];
|
|
p++;
|
|
if (len == 0)
|
|
return AVERROR_INVALIDDATA;
|
|
flags = *p++;
|
|
len--;
|
|
if (!(flags & 0x10))
|
|
return AVERROR_INVALIDDATA;
|
|
if (len < 6)
|
|
return AVERROR_INVALIDDATA;
|
|
v = AV_RB32(p);
|
|
*ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
|
|
*ppcr_low = ((p[4] & 1) << 8) | p[5];
|
|
return 0;
|
|
}
|
|
|
|
static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
|
|
|
|
/* NOTE: We attempt to seek on non-seekable files as well, as the
|
|
* probe buffer usually is big enough. Only warn if the seek failed
|
|
* on files where the seek should work. */
|
|
if (avio_seek(pb, pos, SEEK_SET) < 0)
|
|
av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
|
|
}
|
|
|
|
static int mpegts_read_header(AVFormatContext *s)
|
|
{
|
|
MpegTSContext *ts = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
int64_t pos, probesize = s->probesize;
|
|
|
|
s->internal->prefer_codec_framerate = 1;
|
|
|
|
if (ffio_ensure_seekback(pb, probesize) < 0)
|
|
av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
|
|
|
|
pos = avio_tell(pb);
|
|
ts->raw_packet_size = get_packet_size(s);
|
|
if (ts->raw_packet_size <= 0) {
|
|
av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
|
|
ts->raw_packet_size = TS_PACKET_SIZE;
|
|
}
|
|
ts->stream = s;
|
|
ts->auto_guess = 0;
|
|
|
|
if (s->iformat == &ff_mpegts_demuxer) {
|
|
/* normal demux */
|
|
|
|
/* first do a scan to get all the services */
|
|
seek_back(s, pb, pos);
|
|
|
|
mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
|
|
|
|
mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
|
|
|
|
handle_packets(ts, probesize / ts->raw_packet_size);
|
|
/* if could not find service, enable auto_guess */
|
|
|
|
ts->auto_guess = 1;
|
|
|
|
av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
|
|
|
|
s->ctx_flags |= AVFMTCTX_NOHEADER;
|
|
} else {
|
|
AVStream *st;
|
|
int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
|
|
int64_t pcrs[2], pcr_h;
|
|
int packet_count[2];
|
|
uint8_t packet[TS_PACKET_SIZE];
|
|
const uint8_t *data;
|
|
|
|
/* only read packets */
|
|
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
avpriv_set_pts_info(st, 60, 1, 27000000);
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
|
|
st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
|
|
|
|
/* we iterate until we find two PCRs to estimate the bitrate */
|
|
pcr_pid = -1;
|
|
nb_pcrs = 0;
|
|
nb_packets = 0;
|
|
for (;;) {
|
|
ret = read_packet(s, packet, ts->raw_packet_size, &data);
|
|
if (ret < 0)
|
|
return ret;
|
|
pid = AV_RB16(data + 1) & 0x1fff;
|
|
if ((pcr_pid == -1 || pcr_pid == pid) &&
|
|
parse_pcr(&pcr_h, &pcr_l, data) == 0) {
|
|
finished_reading_packet(s, ts->raw_packet_size);
|
|
pcr_pid = pid;
|
|
packet_count[nb_pcrs] = nb_packets;
|
|
pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
|
|
nb_pcrs++;
|
|
if (nb_pcrs >= 2) {
|
|
if (pcrs[1] - pcrs[0] > 0) {
|
|
/* the difference needs to be positive to make sense for bitrate computation */
|
|
break;
|
|
} else {
|
|
av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
|
|
pcrs[0] = pcrs[1];
|
|
packet_count[0] = packet_count[1];
|
|
nb_pcrs--;
|
|
}
|
|
}
|
|
} else {
|
|
finished_reading_packet(s, ts->raw_packet_size);
|
|
}
|
|
nb_packets++;
|
|
}
|
|
|
|
/* NOTE1: the bitrate is computed without the FEC */
|
|
/* NOTE2: it is only the bitrate of the start of the stream */
|
|
ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
|
|
ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
|
|
s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
|
|
st->codecpar->bit_rate = s->bit_rate;
|
|
st->start_time = ts->cur_pcr;
|
|
av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
|
|
st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
|
|
}
|
|
|
|
seek_back(s, pb, pos);
|
|
return 0;
|
|
}
|
|
|
|
#define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
|
|
|
|
static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
MpegTSContext *ts = s->priv_data;
|
|
int ret, i;
|
|
int64_t pcr_h, next_pcr_h, pos;
|
|
int pcr_l, next_pcr_l;
|
|
uint8_t pcr_buf[12];
|
|
const uint8_t *data;
|
|
|
|
if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
|
|
return AVERROR(ENOMEM);
|
|
ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
|
|
pkt->pos = avio_tell(s->pb);
|
|
if (ret < 0) {
|
|
av_packet_unref(pkt);
|
|
return ret;
|
|
}
|
|
if (data != pkt->data)
|
|
memcpy(pkt->data, data, ts->raw_packet_size);
|
|
finished_reading_packet(s, ts->raw_packet_size);
|
|
if (ts->mpeg2ts_compute_pcr) {
|
|
/* compute exact PCR for each packet */
|
|
if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
|
|
/* we read the next PCR (XXX: optimize it by using a bigger buffer */
|
|
pos = avio_tell(s->pb);
|
|
for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
|
|
avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
|
|
avio_read(s->pb, pcr_buf, 12);
|
|
if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
|
|
/* XXX: not precise enough */
|
|
ts->pcr_incr =
|
|
((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
|
|
(i + 1);
|
|
break;
|
|
}
|
|
}
|
|
avio_seek(s->pb, pos, SEEK_SET);
|
|
/* no next PCR found: we use previous increment */
|
|
ts->cur_pcr = pcr_h * 300 + pcr_l;
|
|
}
|
|
pkt->pts = ts->cur_pcr;
|
|
pkt->duration = ts->pcr_incr;
|
|
ts->cur_pcr += ts->pcr_incr;
|
|
}
|
|
pkt->stream_index = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
MpegTSContext *ts = s->priv_data;
|
|
int ret, i;
|
|
|
|
pkt->size = -1;
|
|
ts->pkt = pkt;
|
|
ret = handle_packets(ts, 0);
|
|
if (ret < 0) {
|
|
av_packet_unref(ts->pkt);
|
|
/* flush pes data left */
|
|
for (i = 0; i < NB_PID_MAX; i++)
|
|
if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
|
|
PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
|
|
if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
|
|
ret = new_pes_packet(pes, pkt);
|
|
if (ret < 0)
|
|
return ret;
|
|
pes->state = MPEGTS_SKIP;
|
|
ret = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!ret && pkt->size < 0)
|
|
ret = AVERROR_INVALIDDATA;
|
|
return ret;
|
|
}
|
|
|
|
static void mpegts_free(MpegTSContext *ts)
|
|
{
|
|
int i;
|
|
|
|
clear_programs(ts);
|
|
|
|
for (i = 0; i < NB_PID_MAX; i++)
|
|
if (ts->pids[i])
|
|
mpegts_close_filter(ts, ts->pids[i]);
|
|
}
|
|
|
|
static int mpegts_read_close(AVFormatContext *s)
|
|
{
|
|
MpegTSContext *ts = s->priv_data;
|
|
mpegts_free(ts);
|
|
return 0;
|
|
}
|
|
|
|
static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
|
|
int64_t *ppos, int64_t pos_limit)
|
|
{
|
|
MpegTSContext *ts = s->priv_data;
|
|
int64_t pos, timestamp;
|
|
uint8_t buf[TS_PACKET_SIZE];
|
|
int pcr_l, pcr_pid =
|
|
((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
|
|
int pos47 = ts->pos47_full % ts->raw_packet_size;
|
|
pos =
|
|
((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
|
|
ts->raw_packet_size + pos47;
|
|
while(pos < pos_limit) {
|
|
if (avio_seek(s->pb, pos, SEEK_SET) < 0)
|
|
return AV_NOPTS_VALUE;
|
|
if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
|
|
return AV_NOPTS_VALUE;
|
|
if (buf[0] != 0x47) {
|
|
if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
|
|
return AV_NOPTS_VALUE;
|
|
pos = avio_tell(s->pb);
|
|
continue;
|
|
}
|
|
if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
|
|
parse_pcr(×tamp, &pcr_l, buf) == 0) {
|
|
*ppos = pos;
|
|
return timestamp;
|
|
}
|
|
pos += ts->raw_packet_size;
|
|
}
|
|
|
|
return AV_NOPTS_VALUE;
|
|
}
|
|
|
|
static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
|
|
int64_t *ppos, int64_t pos_limit)
|
|
{
|
|
MpegTSContext *ts = s->priv_data;
|
|
int64_t pos;
|
|
int pos47 = ts->pos47_full % ts->raw_packet_size;
|
|
pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
|
|
ff_read_frame_flush(s);
|
|
if (avio_seek(s->pb, pos, SEEK_SET) < 0)
|
|
return AV_NOPTS_VALUE;
|
|
while(pos < pos_limit) {
|
|
int ret;
|
|
AVPacket pkt;
|
|
av_init_packet(&pkt);
|
|
ret = av_read_frame(s, &pkt);
|
|
if (ret < 0)
|
|
return AV_NOPTS_VALUE;
|
|
if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
|
|
ff_reduce_index(s, pkt.stream_index);
|
|
av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
|
|
if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
|
|
int64_t dts = pkt.dts;
|
|
*ppos = pkt.pos;
|
|
av_packet_unref(&pkt);
|
|
return dts;
|
|
}
|
|
}
|
|
pos = pkt.pos;
|
|
av_packet_unref(&pkt);
|
|
}
|
|
|
|
return AV_NOPTS_VALUE;
|
|
}
|
|
|
|
/**************************************************************/
|
|
/* parsing functions - called from other demuxers such as RTP */
|
|
|
|
MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
|
|
{
|
|
MpegTSContext *ts;
|
|
|
|
ts = av_mallocz(sizeof(MpegTSContext));
|
|
if (!ts)
|
|
return NULL;
|
|
/* no stream case, currently used by RTP */
|
|
ts->raw_packet_size = TS_PACKET_SIZE;
|
|
ts->stream = s;
|
|
ts->auto_guess = 1;
|
|
mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
|
|
mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
|
|
|
|
return ts;
|
|
}
|
|
|
|
/* return the consumed length if a packet was output, or -1 if no
|
|
* packet is output */
|
|
int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
|
|
const uint8_t *buf, int len)
|
|
{
|
|
int len1;
|
|
|
|
len1 = len;
|
|
ts->pkt = pkt;
|
|
for (;;) {
|
|
ts->stop_parse = 0;
|
|
if (len < TS_PACKET_SIZE)
|
|
return AVERROR_INVALIDDATA;
|
|
if (buf[0] != 0x47) {
|
|
buf++;
|
|
len--;
|
|
} else {
|
|
handle_packet(ts, buf);
|
|
buf += TS_PACKET_SIZE;
|
|
len -= TS_PACKET_SIZE;
|
|
if (ts->stop_parse == 1)
|
|
break;
|
|
}
|
|
}
|
|
return len1 - len;
|
|
}
|
|
|
|
void avpriv_mpegts_parse_close(MpegTSContext *ts)
|
|
{
|
|
mpegts_free(ts);
|
|
av_free(ts);
|
|
}
|
|
|
|
AVInputFormat ff_mpegts_demuxer = {
|
|
.name = "mpegts",
|
|
.long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
|
|
.priv_data_size = sizeof(MpegTSContext),
|
|
.read_probe = mpegts_probe,
|
|
.read_header = mpegts_read_header,
|
|
.read_packet = mpegts_read_packet,
|
|
.read_close = mpegts_read_close,
|
|
.read_timestamp = mpegts_get_dts,
|
|
.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
|
|
.priv_class = &mpegts_class,
|
|
};
|
|
|
|
AVInputFormat ff_mpegtsraw_demuxer = {
|
|
.name = "mpegtsraw",
|
|
.long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
|
|
.priv_data_size = sizeof(MpegTSContext),
|
|
.read_header = mpegts_read_header,
|
|
.read_packet = mpegts_raw_read_packet,
|
|
.read_close = mpegts_read_close,
|
|
.read_timestamp = mpegts_get_dts,
|
|
.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
|
|
.priv_class = &mpegtsraw_class,
|
|
};
|