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-rw-r--r--libavformat/mpegts.c481
1 files changed, 369 insertions, 112 deletions
diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c
index d623452130..c91018ec0f 100644
--- a/libavformat/mpegts.c
+++ b/libavformat/mpegts.c
@@ -2,20 +2,20 @@
* MPEG2 transport stream (aka DVB) demuxer
* Copyright (c) 2002-2003 Fabrice Bellard
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -26,6 +26,7 @@
#include "libavutil/dict.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
+#include "libavutil/avassert.h"
#include "libavcodec/bytestream.h"
#include "libavcodec/get_bits.h"
#include "libavcodec/mathops.h"
@@ -52,7 +53,7 @@ enum MpegTSFilterType {
typedef struct MpegTSFilter MpegTSFilter;
-typedef int PESCallback(MpegTSFilter *f, const uint8_t *buf, int len, int is_start, int64_t pos);
+typedef int PESCallback(MpegTSFilter *f, const uint8_t *buf, int len, int is_start, int64_t pos, int64_t cur_pcr);
typedef struct MpegTSPESFilter {
PESCallback *pes_cb;
@@ -98,9 +99,11 @@ struct MpegTSContext {
/** raw packet size, including FEC if present */
int raw_packet_size;
- int pos47;
- /** position corresponding to pos47, or 0 if pos47 invalid */
- int64_t pos;
+ int size_stat[3];
+ int size_stat_count;
+#define SIZE_STAT_THRESHOLD 10
+
+ int64_t pos47_full;
/** if true, all pids are analyzed to find streams */
int auto_guess;
@@ -108,6 +111,9 @@ struct MpegTSContext {
/** compute exact PCR for each transport stream packet */
int mpeg2ts_compute_pcr;
+ /** fix dvb teletext pts */
+ int fix_teletext_pts;
+
int64_t cur_pcr; /**< used to estimate the exact PCR */
int pcr_incr; /**< used to estimate the exact PCR */
@@ -126,12 +132,14 @@ struct MpegTSContext {
unsigned int nb_prg;
struct Program *prg;
+ int8_t crc_validity[NB_PID_MAX];
/** filters for various streams specified by PMT + for the PAT and PMT */
MpegTSFilter *pids[NB_PID_MAX];
+ int current_pid;
};
-static const AVOption options[] = {
+static const AVOption mpegtsraw_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 },
@@ -140,7 +148,20 @@ static const AVOption options[] = {
static const AVClass mpegtsraw_class = {
.class_name = "mpegtsraw demuxer",
.item_name = av_default_item_name,
- .option = options,
+ .option = mpegtsraw_options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+static const AVOption mpegts_options[] = {
+ {"fix_teletext_pts", "Try to fix pts values of dvb teletext streams.", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_INT,
+ {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
+ { NULL },
+};
+
+static const AVClass mpegts_class = {
+ .class_name = "mpegts demuxer",
+ .item_name = av_default_item_name,
+ .option = mpegts_options,
.version = LIBAVUTIL_VERSION_INT,
};
@@ -179,14 +200,30 @@ typedef struct PESContext {
uint8_t header[MAX_PES_HEADER_SIZE];
AVBufferRef *buffer;
SLConfigDescr sl;
+ int64_t last_pcr;
} PESContext;
extern AVInputFormat ff_mpegts_demuxer;
+static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
+{
+ AVProgram *prg = NULL;
+ int i;
+ for(i=0; i<ts->stream->nb_programs; i++)
+ if(ts->stream->programs[i]->id == programid){
+ prg = ts->stream->programs[i];
+ break;
+ }
+ if (!prg)
+ return;
+ prg->nb_stream_indexes = 0;
+}
+
static void clear_program(MpegTSContext *ts, unsigned int programid)
{
int i;
+ clear_avprogram(ts, programid);
for(i=0; i<ts->nb_prg; i++)
if(ts->prg[i].id == programid)
ts->prg[i].nb_pids = 0;
@@ -229,6 +266,17 @@ static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid, unsigned i
p->pids[p->nb_pids++] = pid;
}
+static void set_pcr_pid(AVFormatContext *s, unsigned int programid, unsigned int pid)
+{
+ int i;
+ for(i=0; i<s->nb_programs; i++) {
+ if(s->programs[i]->id == programid) {
+ s->programs[i]->pcr_pid = pid;
+ break;
+ }
+ }
+}
+
/**
* @brief discard_pid() decides if the pid is to be discarded according
* to caller's programs selection
@@ -280,6 +328,7 @@ static int discard_pid(MpegTSContext *ts, unsigned int pid)
static void write_section_data(AVFormatContext *s, MpegTSFilter *tss1,
const uint8_t *buf, int buf_size, int is_start)
{
+ MpegTSContext *ts = s->priv_data;
MpegTSSectionFilter *tss = &tss1->u.section_filter;
int len;
@@ -307,10 +356,19 @@ static void write_section_data(AVFormatContext *s, MpegTSFilter *tss1,
}
if (tss->section_h_size != -1 && tss->section_index >= tss->section_h_size) {
+ int crc_valid = 1;
tss->end_of_section_reached = 1;
- if (!tss->check_crc ||
- av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1,
- tss->section_buf, tss->section_h_size) == 0)
+
+ if (tss->check_crc){
+ crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, tss->section_buf, tss->section_h_size);
+ if (crc_valid){
+ ts->crc_validity[ tss1->pid ] = 100;
+ }else if(ts->crc_validity[ tss1->pid ] > -10){
+ ts->crc_validity[ tss1->pid ]--;
+ }else
+ crc_valid = 2;
+ }
+ if (crc_valid)
tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
}
}
@@ -400,7 +458,7 @@ static int analyze(const uint8_t *buf, int size, int packet_size, int *index){
memset(stat, 0, packet_size*sizeof(int));
for(x=i=0; i<size-3; i++){
- if(buf[i] == 0x47 && !(buf[i+1] & 0x80) && (buf[i+3] & 0x30)){
+ if(buf[i] == 0x47 && !(buf[i+1] & 0x80) && buf[i+3] != 0x47){
stat[x]++;
if(stat[x] > best_score){
best_score= stat[x];
@@ -535,8 +593,13 @@ static const StreamType ISO_types[] = {
{ 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 },
+ { 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 },
@@ -551,6 +614,8 @@ static const StreamType HDMV_types[] = {
{ 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 },
{ 0 },
};
@@ -569,10 +634,17 @@ static const StreamType REGD_types[] = {
{ 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('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('V','C','-','1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
{ 0 },
};
+static const StreamType METADATA_types[] = {
+ { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
+ { 0 },
+};
+
/* descriptor present */
static const StreamType DESC_types[] = {
{ 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
@@ -586,10 +658,16 @@ static const StreamType DESC_types[] = {
static void mpegts_find_stream_type(AVStream *st,
uint32_t stream_type, const StreamType *types)
{
+ if (avcodec_is_open(st->codec)) {
+ av_log(NULL, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
+ return;
+ }
+
for (; types->stream_type; types++) {
if (stream_type == types->stream_type) {
st->codec->codec_type = types->codec_type;
st->codec->codec_id = types->codec_id;
+ st->request_probe = 0;
return;
}
}
@@ -598,6 +676,14 @@ 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)
{
+ int old_codec_type= st->codec->codec_type;
+ int old_codec_id = st->codec->codec_id;
+
+ if (avcodec_is_open(st->codec)) {
+ av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
+ return 0;
+ }
+
avpriv_set_pts_info(st, 33, 1, 90000);
st->priv_data = pes;
st->codec->codec_type = AVMEDIA_TYPE_DATA;
@@ -613,7 +699,8 @@ static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
st->codec->codec_tag = pes->stream_type;
mpegts_find_stream_type(st, pes->stream_type, ISO_types);
- if (prog_reg_desc == AV_RL32("HDMV") &&
+ if ((prog_reg_desc == AV_RL32("HDMV") ||
+ prog_reg_desc == AV_RL32("HDPR")) &&
st->codec->codec_id == AV_CODEC_ID_NONE) {
mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
if (pes->stream_type == 0x83) {
@@ -643,6 +730,10 @@ static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
}
if (st->codec->codec_id == AV_CODEC_ID_NONE)
mpegts_find_stream_type(st, pes->stream_type, MISC_types);
+ if (st->codec->codec_id == AV_CODEC_ID_NONE){
+ st->codec->codec_id = old_codec_id;
+ st->codec->codec_type= old_codec_type;
+ }
return 0;
}
@@ -681,6 +772,13 @@ static void new_pes_packet(PESContext *pes, AVPacket *pkt)
pes->flags = 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;
@@ -688,6 +786,7 @@ static int read_sl_header(PESContext *pes, SLConfigDescr *sl, const uint8_t *buf
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)
@@ -726,9 +825,9 @@ static int read_sl_header(PESContext *pes, SLConfigDescr *sl, const uint8_t *buf
if (sl->inst_bitrate_len)
inst_bitrate_flag = get_bits1(&gb);
if (dts_flag == 1)
- dts = get_bits64(&gb, sl->timestamp_len);
+ dts = get_ts64(&gb, sl->timestamp_len);
if (cts_flag == 1)
- cts = get_bits64(&gb, sl->timestamp_len);
+ cts = get_ts64(&gb, sl->timestamp_len);
if (sl->au_len > 0)
skip_bits_long(&gb, sl->au_len);
if (inst_bitrate_flag)
@@ -749,7 +848,7 @@ static int read_sl_header(PESContext *pes, SLConfigDescr *sl, const uint8_t *buf
/* 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)
+ int64_t pos, int64_t pcr)
{
PESContext *pes = filter->u.pes_filter.opaque;
MpegTSContext *ts = pes->ts;
@@ -759,6 +858,9 @@ static int mpegts_push_data(MpegTSFilter *filter,
if(!ts->pkt)
return 0;
+ if (pcr != -1)
+ pes->last_pcr = pcr;
+
if (is_start) {
if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
new_pes_packet(pes, ts->pkt);
@@ -819,10 +921,10 @@ 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 == AV_CODEC_ID_NONE) {
+ if (pes->st->codec->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
av_dlog(pes->stream, "pid=%x stream_type=%x probing\n",
pes->pid, pes->stream_type);
- pes->st->codec->codec_id = AV_CODEC_ID_PROBE;
+ pes->st->request_probe= 1;
}
} else {
pes->state = MPEGTS_PAYLOAD;
@@ -905,6 +1007,38 @@ static int mpegts_push_data(MpegTSFilter *filter,
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->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
+ AVProgram *p = NULL;
+ 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 && f->type == MPEGTS_PES) {
+ PESContext *pcrpes = f->u.pes_filter.opaque;
+ if (pcrpes && pcrpes->last_pcr != -1 && pcrpes->st && pcrpes->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 = pcrpes->last_pcr / 300;
+ pes->st->pts_wrap_reference = pcrpes->st->pts_wrap_reference;
+ pes->st->pts_wrap_behavior = pcrpes->st->pts_wrap_behavior;
+ if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
+ pes->pts = pes->dts = pcr;
+ } else if (pes->dts > pcr + 3654 + 9000) {
+ pes->pts = pes->dts = pcr + 3654 + 9000;
+ }
+ break;
+ }
+ }
+ }
+ }
+ }
}
break;
case MPEGTS_PAYLOAD:
@@ -961,6 +1095,7 @@ static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
pes->state = MPEGTS_SKIP;
pes->pts = AV_NOPTS_VALUE;
pes->dts = AV_NOPTS_VALUE;
+ pes->last_pcr = -1;
tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
if (!tss) {
av_free(pes);
@@ -1292,15 +1427,17 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type
break;
case 0x1F: /* FMC descriptor */
get16(pp, desc_end);
- if (mp4_descr_count > 0 && st->codec->codec_id == AV_CODEC_ID_AAC_LATM &&
+ if (mp4_descr_count > 0 && (st->codec->codec_id == AV_CODEC_ID_AAC_LATM || 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->codec->codec_id == AV_CODEC_ID_AAC &&
- st->codec->extradata_size > 0)
- st->need_parsing = 0;
+ st->codec->extradata_size > 0){
+ st->request_probe= st->need_parsing = 0;
+ st->codec->codec_type= AVMEDIA_TYPE_AUDIO;
+ }
}
break;
case 0x56: /* DVB teletext descriptor */
@@ -1330,9 +1467,7 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type
if (st->codec->extradata_size == 4 && memcmp(st->codec->extradata, *pp, 4))
avpriv_request_sample(fc, "DVB sub with multiple IDs");
} else {
- st->codec->extradata = av_malloc(4 + FF_INPUT_BUFFER_PADDING_SIZE);
- if (st->codec->extradata) {
- st->codec->extradata_size = 4;
+ if (!ff_alloc_extradata(st->codec, 4)) {
memcpy(st->codec->extradata, *pp, 4);
}
}
@@ -1362,6 +1497,18 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type
if (st->codec->codec_id == AV_CODEC_ID_NONE)
mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
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->codec->codec_tag = bytestream_get_le32(pp);
+ if (st->codec->codec_id == AV_CODEC_ID_NONE)
+ mpegts_find_stream_type(st, st->codec->codec_tag, METADATA_types);
+ }
+ break;
default:
break;
}
@@ -1404,6 +1551,7 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
return;
pcr_pid &= 0x1fff;
add_pid_to_pmt(ts, h->id, pcr_pid);
+ set_pcr_pid(ts->stream, h->id, pcr_pid);
av_dlog(ts->stream, "pcr_pid=0x%x\n", pcr_pid);
@@ -1440,7 +1588,7 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
// stop parsing after pmt, we found header
if (!ts->stream->nb_streams)
- ts->stop_parse = 1;
+ ts->stop_parse = 2;
for(;;) {
st = 0;
@@ -1452,12 +1600,16 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
if (pid < 0)
break;
pid &= 0x1fff;
+ if (pid == ts->current_pid)
+ break;
/* 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);
+ if (!pes->st)
+ goto out;
pes->st->id = pes->pid;
}
st = pes->st;
@@ -1466,6 +1618,8 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
pes = add_pes_stream(ts, pid, pcr_pid);
if (pes) {
st = avformat_new_stream(pes->stream, NULL);
+ if (!st)
+ goto out;
st->id = pes->pid;
}
} else {
@@ -1474,6 +1628,8 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
st = ts->stream->streams[idx];
} else {
st = avformat_new_stream(ts->stream, NULL);
+ if (!st)
+ goto out;
st->id = pid;
st->codec->codec_type = AVMEDIA_TYPE_DATA;
}
@@ -1520,6 +1676,7 @@ static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
SectionHeader h1, *h = &h1;
const uint8_t *p, *p_end;
int sid, pmt_pid;
+ AVProgram *program;
av_dlog(ts->stream, "PAT:\n");
hex_dump_debug(ts->stream, section, section_len);
@@ -1531,6 +1688,8 @@ static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
if (h->tid != PAT_TID)
return;
+ ts->stream->ts_id = h->id;
+
clear_programs(ts);
for(;;) {
sid = get16(&p, p_end);
@@ -1541,20 +1700,42 @@ static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
break;
pmt_pid &= 0x1fff;
+ if (pmt_pid == ts->current_pid)
+ break;
+
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);
+ MpegTSFilter *fil = ts->pids[pmt_pid];
+ program = av_new_program(ts->stream, sid);
+ 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)
+ clear_avprogram(ts, ts->stream->programs[j]->id);
+ }
+ }
}
static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
@@ -1634,6 +1815,9 @@ static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
}
}
+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)
{
@@ -1655,6 +1839,7 @@ static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
}
if (!tss)
return 0;
+ ts->current_pid = pid;
afc = (packet[3] >> 4) & 3;
if (afc == 0) /* reserved value */
@@ -1675,7 +1860,7 @@ static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
tss->last_cc = cc;
if (!cc_ok) {
- av_log(ts->stream, AV_LOG_WARNING,
+ 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) {
@@ -1697,7 +1882,10 @@ static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
return 0;
pos = avio_tell(ts->stream->pb);
- MOD_UNLIKELY(ts->pos47, pos, ts->raw_packet_size, ts->pos);
+ if (pos >= 0) {
+ av_assert0(pos >= TS_PACKET_SIZE);
+ ts->pos47_full = pos - TS_PACKET_SIZE;
+ }
if (tss->type == MPEGTS_SECTION) {
if (is_start) {
@@ -1726,15 +1914,53 @@ static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
}
} else {
int ret;
+ int64_t pcr = -1;
+ int64_t pcr_h;
+ int pcr_l;
+ if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
+ pcr = pcr_h * 300 + pcr_l;
// Note: The position here points actually behind the current packet.
if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
- pos - ts->raw_packet_size)) < 0)
+ pos - ts->raw_packet_size, pcr)) < 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)
@@ -1744,10 +1970,11 @@ static int mpegts_resync(AVFormatContext *s)
for(i = 0;i < MAX_RESYNC_SIZE; i++) {
c = avio_r8(pb);
- if (pb->eof_reached)
+ if (url_feof(pb))
return -1;
if (c == 0x47) {
avio_seek(pb, -1, SEEK_CUR);
+ reanalyze(s->priv_data);
return 0;
}
}
@@ -1769,7 +1996,7 @@ static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size, co
/* check packet sync byte */
if ((*data)[0] != 0x47) {
/* find a new packet start */
- avio_seek(pb, -TS_PACKET_SIZE, SEEK_CUR);
+ avio_seek(pb, -raw_packet_size, SEEK_CUR);
if (mpegts_resync(s) < 0)
return AVERROR(EAGAIN);
else
@@ -1792,7 +2019,7 @@ static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
static int handle_packets(MpegTSContext *ts, int nb_packets)
{
AVFormatContext *s = ts->stream;
- uint8_t packet[TS_PACKET_SIZE+FF_INPUT_BUFFER_PADDING_SIZE];
+ uint8_t packet[TS_PACKET_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
const uint8_t *data;
int packet_num, ret = 0;
@@ -1807,6 +2034,7 @@ static int handle_packets(MpegTSContext *ts, int nb_packets)
av_buffer_unref(&pes->buffer);
pes->data_index = 0;
pes->state = MPEGTS_SKIP; /* skip until pes header */
+ pes->last_pcr = -1;
}
ts->pids[i]->last_cc = -1;
}
@@ -1817,11 +2045,15 @@ static int handle_packets(MpegTSContext *ts, int nb_packets)
packet_num = 0;
memset(packet + TS_PACKET_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
for(;;) {
- if (ts->stop_parse>0)
- break;
packet_num++;
- if (nb_packets != 0 && packet_num >= nb_packets)
+ 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;
@@ -1837,24 +2069,34 @@ static int handle_packets(MpegTSContext *ts, int nb_packets)
static int mpegts_probe(AVProbeData *p)
{
const int size= p->buf_size;
- int score, fec_score, dvhs_score;
+ 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 < CHECK_COUNT)
return -1;
- score = analyze(p->buf, TS_PACKET_SIZE *check_count, TS_PACKET_SIZE , NULL)*CHECK_COUNT/check_count;
- dvhs_score= analyze(p->buf, TS_DVHS_PACKET_SIZE*check_count, TS_DVHS_PACKET_SIZE, NULL)*CHECK_COUNT/check_count;
- fec_score = analyze(p->buf, TS_FEC_PACKET_SIZE *check_count, TS_FEC_PACKET_SIZE , NULL)*CHECK_COUNT/check_count;
- av_dlog(NULL, "score: %d, dvhs_score: %d, fec_score: %d \n",
- score, dvhs_score, fec_score);
+ 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 , NULL);
+ int dvhs_score= analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, NULL);
+ int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , NULL);
+ 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;
-// we need a clear definition for the returned score otherwise things will become messy sooner or later
- if (score > fec_score && score > dvhs_score && score > 6) return AVPROBE_SCORE_MAX + score - CHECK_COUNT;
- 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;
+ av_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
+
+ if (sumscore > 6) return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
+ else if (maxscore > 6) return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
+ else return -1;
}
/* return the 90kHz PCR and the extension for the 27MHz PCR. return
@@ -1886,22 +2128,33 @@ static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
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 ? 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;
- uint8_t buf[5*1024];
+ uint8_t buf[8*1024]={0};
int len;
int64_t pos;
- /* read the first 1024 bytes to get packet size */
+ ffio_ensure_seekback(pb, s->probesize);
+
+ /* read the first 8192 bytes to get packet size */
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));
- if (ts->raw_packet_size <= 0)
- goto fail;
+ ts->raw_packet_size = get_packet_size(buf, len);
+ 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;
@@ -1909,8 +2162,7 @@ static int mpegts_read_header(AVFormatContext *s)
/* normal demux */
/* 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");
+ seek_back(s, pb, pos);
mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
@@ -1948,7 +2200,7 @@ static int mpegts_read_header(AVFormatContext *s)
for(;;) {
ret = read_packet(s, packet, ts->raw_packet_size, &data);
if (ret < 0)
- return -1;
+ goto fail;
pid = AV_RB16(data + 1) & 0x1fff;
if ((pcr_pid == -1 || pcr_pid == pid) &&
parse_pcr(&pcr_h, &pcr_l, data) == 0) {
@@ -1976,7 +2228,7 @@ static int mpegts_read_header(AVFormatContext *s)
st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
}
- avio_seek(pb, pos, SEEK_SET);
+ seek_back(s, pb, pos);
return 0;
fail:
return -1;
@@ -2042,6 +2294,7 @@ static int mpegts_read_packet(AVFormatContext *s,
ts->pkt = pkt;
ret = handle_packets(ts, 0);
if (ret < 0) {
+ av_free_packet(ts->pkt);
/* flush pes data left */
for (i = 0; i < NB_PID_MAX; i++) {
if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
@@ -2078,66 +2331,68 @@ static int mpegts_read_close(AVFormatContext *s)
return 0;
}
-static int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
+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;
- const int find_next= 1;
- pos = ((*ppos + ts->raw_packet_size - 1 - ts->pos47) / ts->raw_packet_size) * ts->raw_packet_size + ts->pos47;
- if (find_next) {
- for(;;) {
- avio_seek(s->pb, pos, SEEK_SET);
- if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
+ 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) {
+ avio_seek(s->pb, -TS_PACKET_SIZE, SEEK_CUR);
+ if (mpegts_resync(s) < 0)
return AV_NOPTS_VALUE;
- if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
- parse_pcr(&timestamp, &pcr_l, buf) == 0) {
- break;
- }
- pos += ts->raw_packet_size;
+ pos = avio_tell(s->pb);
+ continue;
}
- } else {
- for(;;) {
- pos -= ts->raw_packet_size;
- if (pos < 0)
- return AV_NOPTS_VALUE;
- 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(&timestamp, &pcr_l, buf) == 0) {
- break;
- }
+ if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
+ parse_pcr(&timestamp, &pcr_l, buf) == 0) {
+ *ppos = pos;
+ return timestamp;
}
+ pos += ts->raw_packet_size;
}
- *ppos = pos;
- return timestamp;
+ return AV_NOPTS_VALUE;
}
-static int read_seek(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
+static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
+ int64_t *ppos, int64_t pos_limit)
+{
MpegTSContext *ts = s->priv_data;
- uint8_t buf[TS_PACKET_SIZE];
int64_t pos;
-
- if (ff_seek_frame_binary(s, stream_index, target_ts, flags) < 0)
- return -1;
-
- pos= avio_tell(s->pb);
-
- for(;;) {
- 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;
+ 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;
+ av_free_packet(&pkt);
+ 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){
+ *ppos= pkt.pos;
+ return pkt.dts;
+ }
+ }
+ pos = pkt.pos;
}
- avio_seek(s->pb, pos, SEEK_SET);
- return 0;
+ return AV_NOPTS_VALUE;
}
/**************************************************************/
@@ -2154,6 +2409,9 @@ MpegTSContext *ff_mpegts_parse_open(AVFormatContext *s)
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;
}
@@ -2166,10 +2424,8 @@ int ff_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
len1 = len;
ts->pkt = pkt;
- ts->stop_parse = 0;
for(;;) {
- if (ts->stop_parse>0)
- break;
+ ts->stop_parse = 0;
if (len < TS_PACKET_SIZE)
return -1;
if (buf[0] != 0x47) {
@@ -2179,6 +2435,8 @@ int ff_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
handle_packet(ts, buf);
buf += TS_PACKET_SIZE;
len -= TS_PACKET_SIZE;
+ if (ts->stop_parse == 1)
+ break;
}
}
return len1 - len;
@@ -2198,9 +2456,9 @@ AVInputFormat ff_mpegts_demuxer = {
.read_header = mpegts_read_header,
.read_packet = mpegts_read_packet,
.read_close = mpegts_read_close,
- .read_seek = read_seek,
- .read_timestamp = mpegts_get_pcr,
+ .read_timestamp = mpegts_get_dts,
.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
+ .priv_class = &mpegts_class,
};
AVInputFormat ff_mpegtsraw_demuxer = {
@@ -2210,8 +2468,7 @@ AVInputFormat ff_mpegtsraw_demuxer = {
.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,
+ .read_timestamp = mpegts_get_dts,
.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
.priv_class = &mpegtsraw_class,
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-09 13:30:49 +0000