X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fmpegts.c;h=a3d5e8e835c0edc846a402fb592116647d82ef58;hb=d1f05dd18375f2f8e68372edee11436927e43ba8;hp=59603384d2d392f2541914f37b43278ee4a16ba4;hpb=b74f67eb17b3dae49cb42affa07b5c41ef09160e;p=ffmpeg diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c index 59603384d2d..a3d5e8e835c 100644 --- a/libavformat/mpegts.c +++ b/libavformat/mpegts.c @@ -2,37 +2,38 @@ * MPEG2 transport stream (aka DVB) demuxer * Copyright (c) 2002-2003 Fabrice Bellard * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * - * FFmpeg is distributed in the hope that it will be useful, + * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ -//#define DEBUG -//#define DEBUG_SEEK -//#define USE_SYNCPOINT_SEARCH - #include "libavutil/crc.h" #include "libavutil/intreadwrite.h" +#include "libavutil/log.h" +#include "libavutil/dict.h" +#include "libavutil/mathematics.h" +#include "libavutil/opt.h" #include "libavcodec/bytestream.h" +#include "libavcodec/get_bits.h" #include "avformat.h" #include "mpegts.h" #include "internal.h" +#include "avio_internal.h" #include "seek.h" - -/* 1.0 second at 24Mbit/s */ -#define MAX_SCAN_PACKETS 32000 +#include "mpeg.h" +#include "isom.h" /* maximum size in which we look for synchronisation if synchronisation is lost */ @@ -40,6 +41,8 @@ #define MAX_PES_PAYLOAD 200*1024 +#define MAX_MP4_DESCR_COUNT 16 + enum MpegTSFilterType { MPEGTS_PES, MPEGTS_SECTION, @@ -70,6 +73,7 @@ typedef struct MpegTSSectionFilter { struct MpegTSFilter { int pid; + int es_id; int last_cc; /* last cc code (-1 if first packet) */ enum MpegTSFilterType type; union { @@ -86,6 +90,7 @@ struct Program { }; struct MpegTSContext { + const AVClass *class; /* user data */ AVFormatContext *stream; /** raw packet size, including FEC if present */ @@ -122,6 +127,19 @@ struct MpegTSContext { MpegTSFilter *pids[NB_PID_MAX]; }; +static const AVOption options[] = { + {"compute_pcr", "Compute exact PCR for each transport stream packet.", offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_INT, + {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, + { NULL }, +}; + +static const AVClass mpegtsraw_class = { + .class_name = "mpegtsraw demuxer", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, +}; + /* TS stream handling */ enum MpegTSState { @@ -148,6 +166,7 @@ typedef struct PESContext { enum MpegTSState state; /* used to get the format */ int data_index; + int flags; /**< copied to the AVPacket flags */ int total_size; int pes_header_size; int extended_stream_id; @@ -155,9 +174,10 @@ typedef struct PESContext { int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */ uint8_t header[MAX_PES_HEADER_SIZE]; uint8_t *buffer; + SLConfigDescr sl; } PESContext; -extern AVInputFormat mpegts_demuxer; +extern AVInputFormat ff_mpegts_demuxer; static void clear_program(MpegTSContext *ts, unsigned int programid) { @@ -206,11 +226,11 @@ static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid, unsigned i } /** - * \brief discard_pid() decides if the pid is to be discarded according + * @brief discard_pid() decides if the pid is to be discarded according * to caller's programs selection - * \param ts : - TS context - * \param pid : - pid - * \return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL + * @param ts : - TS context + * @param pid : - pid + * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL * 0 otherwise */ static int discard_pid(MpegTSContext *ts, unsigned int pid) @@ -239,7 +259,7 @@ static int discard_pid(MpegTSContext *ts, unsigned int pid) } /** - * Assembles PES packets out of TS packets, and then calls the "section_cb" + * Assemble PES packets out of TS packets, and then call the "section_cb" * function when they are complete. */ static void write_section_data(AVFormatContext *s, MpegTSFilter *tss1, @@ -288,7 +308,7 @@ static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, unsigned int MpegTSFilter *filter; MpegTSSectionFilter *sec; - dprintf(ts->stream, "Filter: pid=0x%x\n", pid); + av_dlog(ts->stream, "Filter: pid=0x%x\n", pid); if (pid >= NB_PID_MAX || ts->pids[pid]) return NULL; @@ -298,6 +318,7 @@ static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, unsigned int ts->pids[pid] = filter; filter->type = MPEGTS_SECTION; filter->pid = pid; + filter->es_id = -1; filter->last_cc = -1; sec = &filter->u.section_filter; sec->section_cb = section_cb; @@ -326,6 +347,7 @@ static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid, ts->pids[pid] = filter; filter->type = MPEGTS_PES; filter->pid = pid; + filter->es_id = -1; filter->last_cc = -1; pes = &filter->u.pes_filter; pes->pes_cb = pes_cb; @@ -344,7 +366,7 @@ static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter) PESContext *pes = filter->u.pes_filter.opaque; av_freep(&pes->buffer); /* referenced private data will be freed later in - * av_close_input_stream */ + * avformat_close_input */ if (!((PESContext *)filter->u.pes_filter.opaque)->st) { av_freep(&filter->u.pes_filter.opaque); } @@ -432,7 +454,7 @@ static inline int get16(const uint8_t **pp, const uint8_t *p_end) return c; } -/* read and allocate a DVB string preceeded by its length */ +/* read and allocate a DVB string preceded by its length */ static char *getstr8(const uint8_t **pp, const uint8_t *p_end) { int len; @@ -487,53 +509,60 @@ static int parse_section_header(SectionHeader *h, typedef struct { uint32_t stream_type; enum AVMediaType codec_type; - enum CodecID codec_id; + enum AVCodecID codec_id; } StreamType; static const StreamType ISO_types[] = { - { 0x01, AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG2VIDEO }, - { 0x02, AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG2VIDEO }, - { 0x03, AVMEDIA_TYPE_AUDIO, CODEC_ID_MP3 }, - { 0x04, AVMEDIA_TYPE_AUDIO, CODEC_ID_MP3 }, - { 0x0f, AVMEDIA_TYPE_AUDIO, CODEC_ID_AAC }, - { 0x10, AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG4 }, - //{ 0x11, AVMEDIA_TYPE_AUDIO, CODEC_ID_AAC }, /* LATM syntax */ - { 0x1b, AVMEDIA_TYPE_VIDEO, CODEC_ID_H264 }, - { 0xd1, AVMEDIA_TYPE_VIDEO, CODEC_ID_DIRAC }, - { 0xea, AVMEDIA_TYPE_VIDEO, CODEC_ID_VC1 }, + { 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 }, + { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */ + { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 }, + { 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, CODEC_ID_PCM_BLURAY }, - { 0x81, AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 }, - { 0x82, AVMEDIA_TYPE_AUDIO, CODEC_ID_DTS }, - { 0x83, AVMEDIA_TYPE_AUDIO, CODEC_ID_TRUEHD }, - { 0x84, AVMEDIA_TYPE_AUDIO, CODEC_ID_EAC3 }, - { 0x90, AVMEDIA_TYPE_SUBTITLE, CODEC_ID_HDMV_PGS_SUBTITLE }, + { 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*/ + { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE }, { 0 }, }; /* ATSC ? */ static const StreamType MISC_types[] = { - { 0x81, AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 }, - { 0x8a, AVMEDIA_TYPE_AUDIO, CODEC_ID_DTS }, + { 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, CODEC_ID_DIRAC }, - { MKTAG('A','C','-','3'), AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 }, + { 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('V','C','-','1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 }, { 0 }, }; /* descriptor present */ static const StreamType DESC_types[] = { - { 0x6a, AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 }, /* AC-3 descriptor */ - { 0x7a, AVMEDIA_TYPE_AUDIO, CODEC_ID_EAC3 }, /* E-AC-3 descriptor */ - { 0x7b, AVMEDIA_TYPE_AUDIO, CODEC_ID_DTS }, - { 0x56, AVMEDIA_TYPE_SUBTITLE, CODEC_ID_DVB_TELETEXT }, - { 0x59, AVMEDIA_TYPE_SUBTITLE, CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */ + { 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 }, }; @@ -552,10 +581,10 @@ static void mpegts_find_stream_type(AVStream *st, static int mpegts_set_stream_info(AVStream *st, PESContext *pes, uint32_t stream_type, uint32_t prog_reg_desc) { - av_set_pts_info(st, 33, 1, 90000); + avpriv_set_pts_info(st, 33, 1, 90000); st->priv_data = pes; st->codec->codec_type = AVMEDIA_TYPE_DATA; - st->codec->codec_id = CODEC_ID_NONE; + st->codec->codec_id = AV_CODEC_ID_NONE; st->need_parsing = AVSTREAM_PARSE_FULL; pes->st = st; pes->stream_type = stream_type; @@ -568,7 +597,7 @@ static int mpegts_set_stream_info(AVStream *st, PESContext *pes, mpegts_find_stream_type(st, pes->stream_type, ISO_types); if (prog_reg_desc == AV_RL32("HDMV") && - st->codec->codec_id == CODEC_ID_NONE) { + st->codec->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 @@ -580,37 +609,27 @@ static int mpegts_set_stream_info(AVStream *st, PESContext *pes, return AVERROR(ENOMEM); memcpy(sub_pes, pes, sizeof(*sub_pes)); - sub_st = av_new_stream(pes->stream, pes->pid); + sub_st = avformat_new_stream(pes->stream, NULL); if (!sub_st) { av_free(sub_pes); return AVERROR(ENOMEM); } - av_set_pts_info(sub_st, 33, 1, 90000); + sub_st->id = pes->pid; + avpriv_set_pts_info(sub_st, 33, 1, 90000); sub_st->priv_data = sub_pes; sub_st->codec->codec_type = AVMEDIA_TYPE_AUDIO; - sub_st->codec->codec_id = CODEC_ID_AC3; + sub_st->codec->codec_id = AV_CODEC_ID_AC3; sub_st->need_parsing = AVSTREAM_PARSE_FULL; sub_pes->sub_st = pes->sub_st = sub_st; } } - if (pes->stream_type == 0x11) - av_log(pes->stream, AV_LOG_WARNING, - "AAC LATM not currently supported, patch welcome\n"); - if (st->codec->codec_id == CODEC_ID_NONE) + if (st->codec->codec_id == AV_CODEC_ID_NONE) mpegts_find_stream_type(st, pes->stream_type, MISC_types); return 0; } -static int64_t get_pts(const uint8_t *p) -{ - int64_t pts = (int64_t)((p[0] >> 1) & 0x07) << 30; - pts |= (AV_RB16(p + 1) >> 1) << 15; - pts |= AV_RB16(p + 3) >> 1; - return pts; -} - static void new_pes_packet(PESContext *pes, AVPacket *pkt) { av_init_packet(pkt); @@ -618,6 +637,12 @@ static void new_pes_packet(PESContext *pes, AVPacket *pkt) pkt->destruct = av_destruct_packet; pkt->data = pes->buffer; 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, FF_INPUT_BUFFER_PADDING_SIZE); // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID @@ -629,12 +654,92 @@ static void new_pes_packet(PESContext *pes, AVPacket *pkt) pkt->dts = pes->dts; /* store position of first TS packet of this PES packet */ pkt->pos = pes->ts_packet_pos; + pkt->flags = pes->flags; /* reset pts values */ pes->pts = AV_NOPTS_VALUE; pes->dts = AV_NOPTS_VALUE; pes->buffer = NULL; pes->data_index = 0; + pes->flags = 0; +} + +static uint64_t get_bits64(GetBitContext *gb, int bits) +{ + uint64_t ret = 0; + while (bits > 17) { + ret <<= 17; + ret |= get_bits(gb, 17); + bits -= 17; + } + ret <<= bits; + ret |= get_bits(gb, bits); + return ret; +} + +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; + init_get_bits(&gb, buf, buf_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_bits64(&gb, sl->timestamp_len); + if (cts_flag == 1) + cts = get_bits64(&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 */ @@ -673,25 +778,23 @@ static int mpegts_push_data(MpegTSFilter *filter, if (pes->data_index == PES_START_SIZE) { /* we got all the PES or section header. We can now decide */ -#if 0 - av_hex_dump_log(pes->stream, AV_LOG_DEBUG, pes->header, pes->data_index); -#endif if (pes->header[0] == 0x00 && pes->header[1] == 0x00 && pes->header[2] == 0x01) { /* it must be an mpeg2 PES stream */ code = pes->header[3] | 0x100; - dprintf(pes->stream, "pid=%x pes_code=%#x\n", pes->pid, code); + av_dlog(pes->stream, "pid=%x pes_code=%#x\n", pes->pid, code); - if ((!pes->st && pes->stream->nb_streams == MAX_STREAMS) || - (pes->st && pes->st->discard == AVDISCARD_ALL) || + 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) { - pes->st = av_new_stream(ts->stream, pes->pid); + 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); } @@ -711,10 +814,10 @@ static int mpegts_push_data(MpegTSFilter *filter, 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->codec->codec_id == CODEC_ID_NONE) { - dprintf(pes->stream, "pid=%x stream_type=%x probing\n", + if (pes->st->codec->codec_id == AV_CODEC_ID_NONE) { + av_dlog(pes->stream, "pid=%x stream_type=%x probing\n", pes->pid, pes->stream_type); - pes->st->codec->codec_id = CODEC_ID_PROBE; + pes->st->codec->codec_id = AV_CODEC_ID_PROBE; } } else { pes->state = MPEGTS_PAYLOAD; @@ -765,12 +868,12 @@ static int mpegts_push_data(MpegTSFilter *filter, pes->pts = AV_NOPTS_VALUE; pes->dts = AV_NOPTS_VALUE; if ((flags & 0xc0) == 0x80) { - pes->dts = pes->pts = get_pts(r); + pes->dts = pes->pts = ff_parse_pes_pts(r); r += 5; } else if ((flags & 0xc0) == 0xc0) { - pes->pts = get_pts(r); + pes->pts = ff_parse_pes_pts(r); r += 5; - pes->dts = get_pts(r); + pes->dts = ff_parse_pes_pts(r); r += 5; } pes->extended_stream_id = -1; @@ -791,17 +894,27 @@ static int mpegts_push_data(MpegTSFilter *filter, /* 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; + } } break; case MPEGTS_PAYLOAD: if (buf_size > 0 && pes->buffer) { - if (pes->data_index+buf_size > pes->total_size) { + if (pes->data_index > 0 && pes->data_index+buf_size > pes->total_size) { new_pes_packet(pes, ts->pkt); pes->total_size = MAX_PES_PAYLOAD; pes->buffer = av_malloc(pes->total_size+FF_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+pes->data_index, p, buf_size); pes->data_index += buf_size; @@ -811,9 +924,9 @@ static int mpegts_push_data(MpegTSFilter *filter, * 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 6 bytes */ - if (pes->total_size < MAX_PES_PAYLOAD && - pes->pes_header_size + pes->data_index == pes->total_size + 6) { + * 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; new_pes_packet(pes, ts->pkt); } @@ -851,55 +964,466 @@ static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid) return pes; } +#define MAX_LEVEL 4 +typedef struct { + AVFormatContext *s; + AVIOContext pb; + Mp4Descr *descr; + Mp4Descr *active_descr; + int descr_count; + int max_descr_count; + int level; +} 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) { + if (parse_mp4_descr(d, off, len, 0) < 0) + return -1; + 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; + if (d->descr_count >= d->max_descr_count) + return -1; + 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); + parse_mp4_descr(d, off, len, MP4DecConfigDescrTag); + update_offsets(&d->pb, &off, &len); + if (len > 0) + parse_mp4_descr(d, off, len, MP4SLDescrTag); + d->active_descr = NULL; + return 0; +} + +static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off, int len) +{ + Mp4Descr *descr = d->active_descr; + if (!descr) + return -1; + 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 -1; + + 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); + descr->sl.timestamp_len = avio_r8(&d->pb); + descr->sl.ocr_len = avio_r8(&d->pb); + descr->sl.au_len = avio_r8(&d->pb); + 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 { + av_log_missing_feature(d->s, "Predefined SLConfigDescriptor\n", 0); + } + 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); + 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 -1; + } + + if (d->level++ >= MAX_LEVEL) { + av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n"); + goto done; + } + + if (target_tag && tag != target_tag) { + av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag, target_tag); + goto done; + } + + switch (tag) { + case MP4IODescrTag: + parse_MP4IODescrTag(d, off, len1); + break; + case MP4ODescrTag: + parse_MP4ODescrTag(d, off, len1); + break; + case MP4ESDescrTag: + parse_MP4ESDescrTag(d, off, len1); + break; + case MP4DecConfigDescrTag: + parse_MP4DecConfigDescrTag(d, off, len1); + break; + case MP4SLDescrTag: + parse_MP4SLDescrTag(d, off, len1); + break; + } + +done: + d->level--; + avio_seek(&d->pb, off + len1, SEEK_SET); + return 0; +} + +static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size, + Mp4Descr *descr, int *descr_count, int max_descr_count) +{ + MP4DescrParseContext d; + if (init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count) < 0) + return -1; + + parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag); + + *descr_count = d.descr_count; + return 0; +} + +static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size, + Mp4Descr *descr, int *descr_count, int max_descr_count) +{ + MP4DescrParseContext d; + if (init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count) < 0) + return -1; + + parse_mp4_descr_arr(&d, avio_tell(&d.pb), size); + + *descr_count = d.descr_count; + return 0; +} + +static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, int section_len) +{ + MpegTSContext *ts = filter->u.section_filter.opaque; + SectionHeader h; + const uint8_t *p, *p_end; + AVIOContext pb; + Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = {{ 0 }}; + int 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; + + 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] && 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->codec->codec_id == AV_CODEC_ID_AAC && + st->codec->extradata_size > 0) + st->need_parsing = 0; + if (st->codec->codec_id == AV_CODEC_ID_H264 && + st->codec->extradata_size > 0) + st->need_parsing = 0; + + if (st->codec->codec_id <= AV_CODEC_ID_NONE) { + } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_AUDIO) { + st->codec->codec_type = AVMEDIA_TYPE_VIDEO; + } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_SUBTITLE) { + st->codec->codec_type = AVMEDIA_TYPE_AUDIO; + } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_UNKNOWN) { + st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; + } + } + } + for (i = 0; i < mp4_descr_count; i++) + av_free(mp4_descr[i].dec_config_descr); +} + +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; + char language[252]; + int i; + + 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; + + av_dlog(fc, "tag: 0x%02x len=%d\n", desc_tag, desc_len); + + if (st->codec->codec_id == AV_CODEC_ID_NONE && + stream_type == STREAM_TYPE_PRIVATE_DATA) + mpegts_find_stream_type(st, desc_tag, DESC_types); + + switch(desc_tag) { + case 0x1E: /* SL descriptor */ + desc_es_id = get16(pp, desc_end); + 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->codec->codec_id == AV_CODEC_ID_AAC && + st->codec->extradata_size > 0) + st->need_parsing = 0; + if (st->codec->codec_id == AV_CODEC_ID_MPEG4SYSTEMS) + mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1); + } + break; + case 0x1F: /* FMC descriptor */ + get16(pp, desc_end); + if (mp4_descr_count > 0 && st->codec->codec_id == AV_CODEC_ID_AAC_LATM && + 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->codec->codec_id == AV_CODEC_ID_AAC && + st->codec->extradata_size > 0) + st->need_parsing = 0; + } + break; + case 0x56: /* DVB teletext descriptor */ + language[0] = get8(pp, desc_end); + language[1] = get8(pp, desc_end); + language[2] = get8(pp, desc_end); + language[3] = 0; + av_dict_set(&st->metadata, "language", language, 0); + break; + case 0x59: /* subtitling descriptor */ + language[0] = get8(pp, desc_end); + language[1] = get8(pp, desc_end); + language[2] = get8(pp, desc_end); + language[3] = 0; + /* hearing impaired subtitles detection */ + switch(get8(pp, desc_end)) { + 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; + } + if (st->codec->extradata) { + if (st->codec->extradata_size == 4 && memcmp(st->codec->extradata, *pp, 4)) + av_log_ask_for_sample(fc, "DVB sub with multiple IDs\n"); + } else { + st->codec->extradata = av_malloc(4 + FF_INPUT_BUFFER_PADDING_SIZE); + if (st->codec->extradata) { + st->codec->extradata_size = 4; + memcpy(st->codec->extradata, *pp, 4); + } + } + *pp += 4; + av_dict_set(&st->metadata, "language", language, 0); + 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; break; + } + } + if (i) { + language[i - 1] = 0; + av_dict_set(&st->metadata, "language", language, 0); + } + break; + case 0x05: /* registration descriptor */ + st->codec->codec_tag = bytestream_get_le32(pp); + av_dlog(fc, "reg_desc=%.4s\n", (char*)&st->codec->codec_tag); + if (st->codec->codec_id == AV_CODEC_ID_NONE) + mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types); + break; + default: + break; + } + *pp = desc_end; + return 0; +} + static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len) { MpegTSContext *ts = filter->u.section_filter.opaque; SectionHeader h1, *h = &h1; PESContext *pes; AVStream *st; - const uint8_t *p, *p_end, *desc_list_end, *desc_end; + const uint8_t *p, *p_end, *desc_list_end; int program_info_length, pcr_pid, pid, stream_type; - int desc_list_len, desc_len, desc_tag; - int comp_page, anc_page; - char language[4]; + int desc_list_len; uint32_t prog_reg_desc = 0; /* registration descriptor */ -#ifdef DEBUG - dprintf(ts->stream, "PMT: len %i\n", section_len); - av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (uint8_t *)section, section_len); -#endif + Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = {{ 0 }}; + int mp4_descr_count = 0; + int i; + + av_dlog(ts->stream, "PMT: len %i\n", section_len); + hex_dump_debug(ts->stream, (uint8_t *)section, section_len); p_end = section + section_len - 4; p = section; if (parse_section_header(h, &p, p_end) < 0) return; - dprintf(ts->stream, "sid=0x%x sec_num=%d/%d\n", + av_dlog(ts->stream, "sid=0x%x sec_num=%d/%d\n", h->id, h->sec_num, h->last_sec_num); if (h->tid != PMT_TID) return; clear_program(ts, h->id); - pcr_pid = get16(&p, p_end) & 0x1fff; + pcr_pid = get16(&p, p_end); if (pcr_pid < 0) return; + pcr_pid &= 0x1fff; add_pid_to_pmt(ts, h->id, pcr_pid); - dprintf(ts->stream, "pcr_pid=0x%x\n", pcr_pid); + av_dlog(ts->stream, "pcr_pid=0x%x\n", pcr_pid); - program_info_length = get16(&p, p_end) & 0xfff; + 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_dlog(ts->stream, "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 == 0x05 && len >= 4) { // registration descriptor + 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; } @@ -907,7 +1431,7 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len } p += program_info_length; if (p >= p_end) - return; + goto out; // stop parsing after pmt, we found header if (!ts->stream->nb_streams) @@ -915,105 +1439,74 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len for(;;) { st = 0; + pes = NULL; stream_type = get8(&p, p_end); if (stream_type < 0) break; - pid = get16(&p, p_end) & 0x1fff; + pid = get16(&p, p_end); if (pid < 0) break; + pid &= 0x1fff; - /* now create ffmpeg stream */ + /* now create stream */ if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) { pes = ts->pids[pid]->u.pes_filter.opaque; + if (!pes->st) { + pes->st = avformat_new_stream(pes->stream, NULL); + pes->st->id = pes->pid; + } st = pes->st; - } else { + } else if (stream_type != 0x13) { 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 (pes) - st = av_new_stream(pes->stream, pes->pid); + if (pes) { + st = avformat_new_stream(pes->stream, NULL); + st->id = pes->pid; + } + } else { + int idx = ff_find_stream_index(ts->stream, pid); + if (idx >= 0) { + st = ts->stream->streams[idx]; + } else { + st = avformat_new_stream(ts->stream, NULL); + st->id = pid; + st->codec->codec_type = AVMEDIA_TYPE_DATA; + } } if (!st) - return; + goto out; - if (!pes->stream_type) + if (pes && !pes->stream_type) mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc); add_pid_to_pmt(ts, h->id, pid); ff_program_add_stream_index(ts->stream, h->id, st->index); - desc_list_len = get16(&p, p_end) & 0xfff; + 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); - if (desc_len < 0) - break; - desc_end = p + desc_len; - if (desc_end > desc_list_end) - break; - - dprintf(ts->stream, "tag: 0x%02x len=%d\n", - desc_tag, desc_len); - - if (st->codec->codec_id == CODEC_ID_NONE && - stream_type == STREAM_TYPE_PRIVATE_DATA) - mpegts_find_stream_type(st, desc_tag, DESC_types); - - switch(desc_tag) { - case 0x56: /* DVB teletext descriptor */ - language[0] = get8(&p, desc_end); - language[1] = get8(&p, desc_end); - language[2] = get8(&p, desc_end); - language[3] = 0; - av_metadata_set2(&st->metadata, "language", language, 0); - break; - case 0x59: /* subtitling descriptor */ - language[0] = get8(&p, desc_end); - language[1] = get8(&p, desc_end); - language[2] = get8(&p, desc_end); - language[3] = 0; - get8(&p, desc_end); - comp_page = get16(&p, desc_end); - anc_page = get16(&p, desc_end); - st->codec->sub_id = (anc_page << 16) | comp_page; - av_metadata_set2(&st->metadata, "language", language, 0); - break; - case 0x0a: /* ISO 639 language descriptor */ - language[0] = get8(&p, desc_end); - language[1] = get8(&p, desc_end); - language[2] = get8(&p, desc_end); - language[3] = 0; - av_metadata_set2(&st->metadata, "language", language, 0); - break; - case 0x05: /* registration descriptor */ - st->codec->codec_tag = bytestream_get_le32(&p); - dprintf(ts->stream, "reg_desc=%.4s\n", (char*)&st->codec->codec_tag); - if (st->codec->codec_id == CODEC_ID_NONE && - stream_type == STREAM_TYPE_PRIVATE_DATA) - mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types); - break; - default: + if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p, desc_list_end, + mp4_descr, mp4_descr_count, pid, ts) < 0) break; - } - p = desc_end; - if (prog_reg_desc == AV_RL32("HDMV") && stream_type == 0x83 && pes->sub_st) { + if (pes && prog_reg_desc == AV_RL32("HDMV") && stream_type == 0x83 && pes->sub_st) { ff_program_add_stream_index(ts->stream, h->id, pes->sub_st->index); pes->sub_st->codec->codec_tag = st->codec->codec_tag; } } p = desc_list_end; } - /* all parameters are there */ - mpegts_close_filter(ts, filter); + + 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) @@ -1023,10 +1516,9 @@ static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len const uint8_t *p, *p_end; int sid, pmt_pid; -#ifdef DEBUG - dprintf(ts->stream, "PAT:\n"); - av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (uint8_t *)section, section_len); -#endif + av_dlog(ts->stream, "PAT:\n"); + hex_dump_debug(ts->stream, (uint8_t *)section, section_len); + p_end = section + section_len - 4; p = section; if (parse_section_header(h, &p, p_end) < 0) @@ -1039,16 +1531,19 @@ static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len sid = get16(&p, p_end); if (sid < 0) break; - pmt_pid = get16(&p, p_end) & 0x1fff; + pmt_pid = get16(&p, p_end); if (pmt_pid < 0) break; + pmt_pid &= 0x1fff; - dprintf(ts->stream, "sid=0x%x pid=0x%x\n", sid, pmt_pid); + av_dlog(ts->stream, "sid=0x%x pid=0x%x\n", sid, pmt_pid); if (sid == 0x0000) { /* NIT info */ } else { av_new_program(ts->stream, sid); + if (ts->pids[pmt_pid]) + mpegts_close_filter(ts, 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 @@ -1065,10 +1560,8 @@ static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type; char *name, *provider_name; -#ifdef DEBUG - dprintf(ts->stream, "SDT:\n"); - av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (uint8_t *)section, section_len); -#endif + av_dlog(ts->stream, "SDT:\n"); + hex_dump_debug(ts->stream, (uint8_t *)section, section_len); p_end = section + section_len - 4; p = section; @@ -1089,9 +1582,10 @@ static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len val = get8(&p, p_end); if (val < 0) break; - desc_list_len = get16(&p, p_end) & 0xfff; + 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; @@ -1104,7 +1598,7 @@ static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len if (desc_end > desc_list_end) break; - dprintf(ts->stream, "tag: 0x%02x len=%d\n", + av_dlog(ts->stream, "tag: 0x%02x len=%d\n", desc_tag, desc_len); switch(desc_tag) { @@ -1119,8 +1613,8 @@ static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len if (name) { AVProgram *program = av_new_program(ts->stream, sid); if(program) { - av_metadata_set2(&program->metadata, "name", name, 0); - av_metadata_set2(&program->metadata, "provider_name", provider_name, 0); + av_dict_set(&program->metadata, "service_name", name, 0); + av_dict_set(&program->metadata, "service_provider", provider_name, 0); } } av_free(name); @@ -1140,7 +1634,8 @@ static int handle_packet(MpegTSContext *ts, const uint8_t *packet) { AVFormatContext *s = ts->stream; MpegTSFilter *tss; - int len, pid, cc, cc_ok, afc, is_start; + 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; @@ -1156,20 +1651,39 @@ static int handle_packet(MpegTSContext *ts, const uint8_t *packet) if (!tss) return 0; + 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); - cc_ok = (tss->last_cc < 0) || ((((tss->last_cc + 1) & 0x0f) == cc)); + 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_WARNING, + "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; + } + } - /* skip adaptation field */ - afc = (packet[3] >> 4) & 3; - p = packet + 4; - if (afc == 0) /* reserved value */ - return 0; - if (afc == 2) /* adaptation field only */ + if (!has_payload) return 0; - if (afc == 3) { - /* skip adapation field */ + p = packet + 4; + if (has_adaptation) { + /* skip adaptation field */ p += p[0] + 1; } /* if past the end of packet, ignore */ @@ -1177,7 +1691,7 @@ static int handle_packet(MpegTSContext *ts, const uint8_t *packet) if (p >= p_end) return 0; - pos = url_ftell(ts->stream->pb); + pos = avio_tell(ts->stream->pb); ts->pos47= pos % ts->raw_packet_size; if (tss->type == MPEGTS_SECTION) { @@ -1220,15 +1734,15 @@ static int handle_packet(MpegTSContext *ts, const uint8_t *packet) get_packet_size() ?) */ static int mpegts_resync(AVFormatContext *s) { - ByteIOContext *pb = s->pb; + AVIOContext *pb = s->pb; int c, i; for(i = 0;i < MAX_RESYNC_SIZE; i++) { - c = url_fgetc(pb); - if (c < 0) + c = avio_r8(pb); + if (pb->eof_reached) return -1; if (c == 0x47) { - url_fseek(pb, -1, SEEK_CUR); + avio_seek(pb, -1, SEEK_CUR); return 0; } } @@ -1240,17 +1754,17 @@ static int mpegts_resync(AVFormatContext *s) /* return -1 if error or EOF. Return 0 if OK. */ static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size) { - ByteIOContext *pb = s->pb; + AVIOContext *pb = s->pb; int skip, len; for(;;) { - len = get_buffer(pb, buf, TS_PACKET_SIZE); + len = avio_read(pb, buf, TS_PACKET_SIZE); if (len != TS_PACKET_SIZE) - return AVERROR(EIO); - /* check paquet sync byte */ + return len < 0 ? len : AVERROR_EOF; + /* check packet sync byte */ if (buf[0] != 0x47) { /* find a new packet start */ - url_fseek(pb, -TS_PACKET_SIZE, SEEK_CUR); + avio_seek(pb, -TS_PACKET_SIZE, SEEK_CUR); if (mpegts_resync(s) < 0) return AVERROR(EAGAIN); else @@ -1258,7 +1772,7 @@ static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size) } else { skip = raw_packet_size - TS_PACKET_SIZE; if (skip > 0) - url_fskip(pb, skip); + avio_skip(pb, skip); break; } } @@ -1268,11 +1782,29 @@ static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size) static int handle_packets(MpegTSContext *ts, int nb_packets) { AVFormatContext *s = ts->stream; - uint8_t packet[TS_PACKET_SIZE]; - int packet_num, ret; + uint8_t packet[TS_PACKET_SIZE+FF_INPUT_BUFFER_PADDING_SIZE]; + int packet_num, ret = 0; + + if (avio_tell(s->pb) != ts->last_pos) { + int i; + av_dlog(ts->stream, "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_freep(&pes->buffer); + pes->data_index = 0; + pes->state = MPEGTS_SKIP; /* skip until pes header */ + } + ts->pids[i]->last_cc = -1; + } + } + } ts->stop_parse = 0; packet_num = 0; + memset(packet + TS_PACKET_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE); for(;;) { if (ts->stop_parse>0) break; @@ -1281,17 +1813,17 @@ static int handle_packets(MpegTSContext *ts, int nb_packets) break; ret = read_packet(s, packet, ts->raw_packet_size); if (ret != 0) - return ret; + break; ret = handle_packet(ts, packet); if (ret != 0) - return ret; + break; } - return 0; + ts->last_pos = avio_tell(s->pb); + return ret; } static int mpegts_probe(AVProbeData *p) { -#if 1 const int size= p->buf_size; int score, fec_score, dvhs_score; int check_count= size / TS_FEC_PACKET_SIZE; @@ -1310,13 +1842,6 @@ static int mpegts_probe(AVProbeData *p) else if(dvhs_score > score && dvhs_score > fec_score && dvhs_score > 6) return AVPROBE_SCORE_MAX + dvhs_score - CHECK_COUNT; else if( fec_score > 6) return AVPROBE_SCORE_MAX + fec_score - CHECK_COUNT; else return -1; -#else - /* only use the extension for safer guess */ - if (av_match_ext(p->filename, "ts")) - return AVPROBE_SCORE_MAX; - else - return 0; -#endif } /* return the 90kHz PCR and the extension for the 27MHz PCR. return @@ -1348,26 +1873,17 @@ static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, return 0; } -static int mpegts_read_header(AVFormatContext *s, - AVFormatParameters *ap) +static int mpegts_read_header(AVFormatContext *s) { MpegTSContext *ts = s->priv_data; - ByteIOContext *pb = s->pb; + AVIOContext *pb = s->pb; uint8_t buf[5*1024]; int len; int64_t pos; - if (ap) { - ts->mpeg2ts_compute_pcr = ap->mpeg2ts_compute_pcr; - if(ap->mpeg2ts_raw){ - av_log(s, AV_LOG_ERROR, "use mpegtsraw_demuxer!\n"); - return -1; - } - } - /* read the first 1024 bytes to get packet size */ - pos = url_ftell(pb); - len = get_buffer(pb, buf, sizeof(buf)); + pos = avio_tell(pb); + len = avio_read(pb, buf, sizeof(buf)); if (len != sizeof(buf)) goto fail; ts->raw_packet_size = get_packet_size(buf, sizeof(buf)); @@ -1376,11 +1892,12 @@ static int mpegts_read_header(AVFormatContext *s, ts->stream = s; ts->auto_guess = 0; - if (s->iformat == &mpegts_demuxer) { + if (s->iformat == &ff_mpegts_demuxer) { /* normal demux */ - /* first do a scaning to get all the services */ - url_fseek(pb, pos, SEEK_SET); + /* first do a scan to get all the services */ + if (avio_seek(pb, pos, SEEK_SET) < 0 && pb->seekable) + av_log(s, AV_LOG_ERROR, "Unable to seek back to the start\n"); mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1); @@ -1391,7 +1908,7 @@ static int mpegts_read_header(AVFormatContext *s, ts->auto_guess = 1; - dprintf(ts->stream, "tuning done\n"); + av_dlog(ts->stream, "tuning done\n"); s->ctx_flags |= AVFMTCTX_NOHEADER; } else { @@ -1403,12 +1920,12 @@ static int mpegts_read_header(AVFormatContext *s, /* only read packets */ - st = av_new_stream(s, 0); + st = avformat_new_stream(s, NULL); if (!st) goto fail; - av_set_pts_info(st, 60, 1, 27000000); + avpriv_set_pts_info(st, 60, 1, 27000000); st->codec->codec_type = AVMEDIA_TYPE_DATA; - st->codec->codec_id = CODEC_ID_MPEG2TS; + st->codec->codec_id = AV_CODEC_ID_MPEG2TS; /* we iterate until we find two PCRs to estimate the bitrate */ pcr_pid = -1; @@ -1438,13 +1955,11 @@ static int mpegts_read_header(AVFormatContext *s, s->bit_rate = (TS_PACKET_SIZE * 8) * 27e6 / ts->pcr_incr; st->codec->bit_rate = s->bit_rate; st->start_time = ts->cur_pcr; -#if 0 - av_log(ts->stream, AV_LOG_DEBUG, "start=%0.3f pcr=%0.3f incr=%d\n", - st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr); -#endif + av_dlog(ts->stream, "start=%0.3f pcr=%0.3f incr=%d\n", + st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr); } - url_fseek(pb, pos, SEEK_SET); + avio_seek(pb, pos, SEEK_SET); return 0; fail: return -1; @@ -1463,7 +1978,7 @@ static int mpegts_raw_read_packet(AVFormatContext *s, if (av_new_packet(pkt, TS_PACKET_SIZE) < 0) return AVERROR(ENOMEM); - pkt->pos= url_ftell(s->pb); + pkt->pos= avio_tell(s->pb); ret = read_packet(s, pkt->data, ts->raw_packet_size); if (ret < 0) { av_free_packet(pkt); @@ -1473,10 +1988,10 @@ static int mpegts_raw_read_packet(AVFormatContext *s, /* 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 = url_ftell(s->pb); + pos = avio_tell(s->pb); for(i = 0; i < MAX_PACKET_READAHEAD; i++) { - url_fseek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET); - get_buffer(s->pb, pcr_buf, 12); + 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)) / @@ -1484,7 +1999,7 @@ static int mpegts_raw_read_packet(AVFormatContext *s, break; } } - url_fseek(s->pb, pos, SEEK_SET); + avio_seek(s->pb, pos, SEEK_SET); /* no next PCR found: we use previous increment */ ts->cur_pcr = pcr_h * 300 + pcr_l; } @@ -1502,18 +2017,7 @@ static int mpegts_read_packet(AVFormatContext *s, MpegTSContext *ts = s->priv_data; int ret, i; - if (url_ftell(s->pb) != ts->last_pos) { - /* seek detected, flush pes buffer */ - 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; - av_freep(&pes->buffer); - pes->data_index = 0; - pes->state = MPEGTS_SKIP; /* skip until pes header */ - } - } - } - + pkt->size = -1; ts->pkt = pkt; ret = handle_packets(ts, 0); if (ret < 0) { @@ -1531,8 +2035,8 @@ static int mpegts_read_packet(AVFormatContext *s, } } - ts->last_pos = url_ftell(s->pb); - + if (!ret && pkt->size < 0) + ret = AVERROR(EINTR); return ret; } @@ -1560,8 +2064,8 @@ static int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index, pos = ((*ppos + ts->raw_packet_size - 1 - ts->pos47) / ts->raw_packet_size) * ts->raw_packet_size + ts->pos47; if (find_next) { for(;;) { - url_fseek(s->pb, pos, SEEK_SET); - if (get_buffer(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE) + avio_seek(s->pb, pos, SEEK_SET); + if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE) return AV_NOPTS_VALUE; if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) && parse_pcr(×tamp, &pcr_l, buf) == 0) { @@ -1574,8 +2078,8 @@ static int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index, pos -= ts->raw_packet_size; if (pos < 0) return AV_NOPTS_VALUE; - url_fseek(s->pb, pos, SEEK_SET); - if (get_buffer(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE) + avio_seek(s->pb, pos, SEEK_SET); + if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE) return AV_NOPTS_VALUE; if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) && parse_pcr(×tamp, &pcr_l, buf) == 0) { @@ -1588,117 +2092,29 @@ static int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index, return timestamp; } -#ifdef USE_SYNCPOINT_SEARCH - -static int read_seek2(AVFormatContext *s, - int stream_index, - int64_t min_ts, - int64_t target_ts, - int64_t max_ts, - int flags) -{ - int64_t pos; - - int64_t ts_ret, ts_adj; - int stream_index_gen_search; - AVStream *st; - AVParserState *backup; - - backup = ff_store_parser_state(s); - - // detect direction of seeking for search purposes - flags |= (target_ts - min_ts > (uint64_t)(max_ts - target_ts)) ? - AVSEEK_FLAG_BACKWARD : 0; - - if (flags & AVSEEK_FLAG_BYTE) { - // use position directly, we will search starting from it - pos = target_ts; - } else { - // search for some position with good timestamp match - if (stream_index < 0) { - stream_index_gen_search = av_find_default_stream_index(s); - if (stream_index_gen_search < 0) { - ff_restore_parser_state(s, backup); - return -1; - } - - st = s->streams[stream_index_gen_search]; - // timestamp for default must be expressed in AV_TIME_BASE units - ts_adj = av_rescale(target_ts, - st->time_base.den, - AV_TIME_BASE * (int64_t)st->time_base.num); - } else { - ts_adj = target_ts; - stream_index_gen_search = stream_index; - } - pos = av_gen_search(s, stream_index_gen_search, ts_adj, - 0, INT64_MAX, -1, - AV_NOPTS_VALUE, - AV_NOPTS_VALUE, - flags, &ts_ret, mpegts_get_pcr); - if (pos < 0) { - ff_restore_parser_state(s, backup); - return -1; - } - } - - // search for actual matching keyframe/starting position for all streams - if (ff_gen_syncpoint_search(s, stream_index, pos, - min_ts, target_ts, max_ts, - flags) < 0) { - ff_restore_parser_state(s, backup); - return -1; - } - - ff_free_parser_state(s, backup); - return 0; -} - -static int read_seek(AVFormatContext *s, int stream_index, int64_t target_ts, int flags) -{ - int ret; - if (flags & AVSEEK_FLAG_BACKWARD) { - flags &= ~AVSEEK_FLAG_BACKWARD; - ret = read_seek2(s, stream_index, INT64_MIN, target_ts, target_ts, flags); - if (ret < 0) - // for compatibility reasons, seek to the best-fitting timestamp - ret = read_seek2(s, stream_index, INT64_MIN, target_ts, INT64_MAX, flags); - } else { - ret = read_seek2(s, stream_index, target_ts, target_ts, INT64_MAX, flags); - if (ret < 0) - // for compatibility reasons, seek to the best-fitting timestamp - ret = read_seek2(s, stream_index, INT64_MIN, target_ts, INT64_MAX, flags); - } - return ret; -} - -#else - static int read_seek(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){ MpegTSContext *ts = s->priv_data; uint8_t buf[TS_PACKET_SIZE]; int64_t pos; - if(av_seek_frame_binary(s, stream_index, target_ts, flags) < 0) + if (ff_seek_frame_binary(s, stream_index, target_ts, flags) < 0) return -1; - pos= url_ftell(s->pb); + pos= avio_tell(s->pb); for(;;) { - url_fseek(s->pb, pos, SEEK_SET); - if (get_buffer(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE) + avio_seek(s->pb, pos, SEEK_SET); + if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE) return -1; // pid = AV_RB16(buf + 1) & 0x1fff; if(buf[1] & 0x40) break; pos += ts->raw_packet_size; } - url_fseek(s->pb, pos, SEEK_SET); + avio_seek(s->pb, pos, SEEK_SET); return 0; } -#endif - /**************************************************************/ /* parsing functions - called from other demuxers such as RTP */ @@ -1752,34 +2168,28 @@ void ff_mpegts_parse_close(MpegTSContext *ts) av_free(ts); } -AVInputFormat mpegts_demuxer = { - "mpegts", - NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"), - sizeof(MpegTSContext), - mpegts_probe, - mpegts_read_header, - mpegts_read_packet, - mpegts_read_close, - read_seek, - mpegts_get_pcr, - .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT, -#ifdef USE_SYNCPOINT_SEARCH - .read_seek2 = read_seek2, -#endif +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_seek = read_seek, + .read_timestamp = mpegts_get_pcr, + .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT, }; -AVInputFormat mpegtsraw_demuxer = { - "mpegtsraw", - NULL_IF_CONFIG_SMALL("MPEG-2 raw transport stream format"), - sizeof(MpegTSContext), - NULL, - mpegts_read_header, - mpegts_raw_read_packet, - mpegts_read_close, - read_seek, - mpegts_get_pcr, - .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT, -#ifdef USE_SYNCPOINT_SEARCH - .read_seek2 = read_seek2, -#endif +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_seek = read_seek, + .read_timestamp = mpegts_get_pcr, + .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT, + .priv_class = &mpegtsraw_class, };