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-rw-r--r--libavformat/mpegts.c828
1 files changed, 608 insertions, 220 deletions
diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c
index b2ba9f74e2..2252b44949 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 "avformat.h"
@@ -54,6 +55,7 @@
enum MpegTSFilterType {
MPEGTS_PES,
MPEGTS_SECTION,
+ MPEGTS_PCR,
};
typedef struct MpegTSFilter MpegTSFilter;
@@ -84,6 +86,7 @@ struct MpegTSFilter {
int pid;
int es_id;
int last_cc; /* last cc code (-1 if first packet) */
+ int64_t last_pcr;
enum MpegTSFilterType type;
union {
MpegTSPESFilter pes_filter;
@@ -96,6 +99,9 @@ struct Program {
unsigned int id; // program id/service id
unsigned int nb_pids;
unsigned int pids[MAX_PIDS_PER_PROGRAM];
+
+ /** have we found pmt for this program */
+ int pmt_found;
};
struct MpegTSContext {
@@ -105,9 +111,11 @@ 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;
@@ -115,6 +123,9 @@ 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 */
@@ -126,6 +137,9 @@ struct MpegTSContext {
/** to detect seek */
int64_t last_pos;
+ int skip_changes;
+ int skip_clear;
+
int resync_size;
/******************************************/
@@ -135,15 +149,25 @@ 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;
};
#define MPEGTS_OPTIONS \
- { "resync_size", "Size limit for looking up a new syncronization.", offsetof(MpegTSContext, resync_size), AV_OPT_TYPE_INT, { .i64 = MAX_RESYNC_SIZE}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }
+ { "resync_size", "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 }
static const AVOption options[] = {
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 },
+ {"ts_packetsize", "Output option carrying the raw packet size.", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
+ {.i64 = 0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
+ {"skip_changes", "Skip changing / adding streams / programs.", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_INT,
+ {.i64 = 0}, 0, 1, 0 },
+ {"skip_clear", "Skip clearing programs.", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_INT,
+ {.i64 = 0}, 0, 1, 0 },
{ NULL },
};
@@ -212,13 +236,42 @@ typedef struct PESContext {
extern AVInputFormat ff_mpegts_demuxer;
+static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
+{
+ int i;
+ for (i = 0; i < ts->nb_prg; i++) {
+ if (ts->prg[i].id == programid) {
+ return &ts->prg[i];
+ }
+ }
+ return NULL;
+}
+
+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)
+ if (ts->prg[i].id == programid) {
ts->prg[i].nb_pids = 0;
+ ts->prg[i].pmt_found = 0;
+ }
}
static void clear_programs(MpegTSContext *ts)
@@ -237,20 +290,14 @@ static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
p = &ts->prg[ts->nb_prg];
p->id = programid;
p->nb_pids = 0;
+ p->pmt_found = 0;
ts->nb_prg++;
}
static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid,
unsigned int pid)
{
- int i;
- struct Program *p = NULL;
- for (i = 0; i < ts->nb_prg; i++) {
- if (ts->prg[i].id == programid) {
- p = &ts->prg[i];
- break;
- }
- }
+ struct Program *p = get_program(ts, programid);
if (!p)
return;
@@ -259,6 +306,26 @@ static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid,
p->pids[p->nb_pids++] = pid;
}
+static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
+{
+ struct Program *p = get_program(ts, programid);
+ if (!p)
+ return;
+
+ p->pmt_found = 1;
+}
+
+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
@@ -336,22 +403,27 @@ static void write_section_data(MpegTSContext *ts, 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);
}
}
-static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
- unsigned int pid,
- SectionCallback *section_cb,
- void *opaque,
- int check_crc)
+static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
+ enum MpegTSFilterType type)
{
MpegTSFilter *filter;
- MpegTSSectionFilter *sec;
av_dlog(ts->stream, "Filter: pid=0x%x\n", pid);
@@ -362,11 +434,26 @@ static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
return NULL;
ts->pids[pid] = filter;
- filter->type = MPEGTS_SECTION;
+ 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;
@@ -386,24 +473,20 @@ static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
MpegTSFilter *filter;
MpegTSPESFilter *pes;
- if (pid >= NB_PID_MAX || ts->pids[pid])
- return NULL;
- filter = av_mallocz(sizeof(MpegTSFilter));
- if (!filter)
+ if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
return NULL;
- 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;
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;
@@ -428,28 +511,26 @@ static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
static int analyze(const uint8_t *buf, int size, int packet_size, int *index)
{
int stat[TS_MAX_PACKET_SIZE];
+ int stat_all = 0;
int i;
- int x = 0;
int best_score = 0;
- memset(stat, 0, packet_size * sizeof(int));
+ memset(stat, 0, packet_size * sizeof(*stat));
- for (x = i = 0; i < size - 3; i++) {
- if (buf[i] == 0x47 && !(buf[i + 1] & 0x80) && (buf[i + 3] & 0x30)) {
+ for (i = 0; i < size - 3; i++) {
+ if (buf[i] == 0x47 && !(buf[i + 1] & 0x80) && buf[i + 3] != 0x47) {
+ int x = i % packet_size;
stat[x]++;
+ stat_all++;
if (stat[x] > best_score) {
best_score = stat[x];
if (index)
*index = x;
}
}
-
- x++;
- if (x == packet_size)
- x = 0;
}
- return best_score;
+ return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
}
/* autodetect fec presence. Must have at least 1024 bytes */
@@ -576,7 +657,11 @@ 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 },
@@ -593,6 +678,8 @@ 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 },
};
@@ -612,10 +699,17 @@ static const StreamType REGD_types[] = {
{ 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 },
+ { 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 */
@@ -630,10 +724,16 @@ 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;
}
}
@@ -641,6 +741,14 @@ 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;
@@ -656,7 +764,8 @@ 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) {
@@ -686,10 +795,23 @@ 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;
}
+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_pes_packet(PESContext *pes, AVPacket *pkt)
{
av_init_packet(pkt);
@@ -717,12 +839,15 @@ static void new_pes_packet(PESContext *pes, AVPacket *pkt)
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;
+ pes->buffer = NULL;
+ reset_pes_packet_state(pes);
+}
+
+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,
@@ -733,6 +858,7 @@ static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
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)
@@ -771,9 +897,9 @@ static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
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)
@@ -808,9 +934,10 @@ static int mpegts_push_data(MpegTSFilter *filter,
if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
new_pes_packet(pes, ts->pkt);
ts->stop_parse = 1;
+ } else {
+ reset_pes_packet_state(pes);
}
pes->state = MPEGTS_HEADER;
- pes->data_index = 0;
pes->ts_packet_pos = pos;
}
p = buf;
@@ -842,6 +969,9 @@ static int mpegts_push_data(MpegTSFilter *filter,
/* stream not present in PMT */
if (!pes->st) {
+ if (ts->skip_changes)
+ goto skip;
+
pes->st = avformat_new_stream(ts->stream, NULL);
if (!pes->st)
return AVERROR(ENOMEM);
@@ -866,12 +996,12 @@ 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;
@@ -955,10 +1085,54 @@ skip:
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) {
+ 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->codec->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;
+ 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->dts > pcr + 3654 + 9000) {
+ pes->pts = pes->dts = pcr + 3654 + 9000;
+ }
+ break;
+ }
+ }
+ }
+ }
+ }
}
break;
case MPEGTS_PAYLOAD:
- if (buf_size > 0 && pes->buffer) {
+ if (pes->buffer) {
if (pes->data_index > 0 &&
pes->data_index + buf_size > pes->total_size) {
new_pes_packet(pes, ts->pkt);
@@ -976,18 +1150,18 @@ skip:
}
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;
+ new_pes_packet(pes, ts->pkt);
+ }
}
buf_size = 0;
- /* 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;
- new_pes_packet(pes, ts->pkt);
- }
break;
case MPEGTS_SKIP:
buf_size = 0;
@@ -1031,6 +1205,7 @@ typedef struct {
int descr_count;
int max_descr_count;
int level;
+ int predefined_SLConfigDescriptor_seen;
} MP4DescrParseContext;
static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
@@ -1154,6 +1329,11 @@ static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
descr->sl.timestamp_res = avio_rb32(&d->pb);
avio_rb32(&d->pb);
descr->sl.timestamp_len = avio_r8(&d->pb);
+ if (descr->sl.timestamp_len > 64) {
+ avpriv_request_sample(NULL, "timestamp_len > 64");
+ descr->sl.timestamp_len = 64;
+ return AVERROR_PATCHWELCOME;
+ }
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);
@@ -1161,8 +1341,9 @@ static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
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 {
+ } else if (!d->predefined_SLConfigDescriptor_seen){
avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
+ d->predefined_SLConfigDescriptor_seen = 1;
}
return 0;
}
@@ -1278,7 +1459,7 @@ static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
AVStream *st;
if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
continue;
- if (!(ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES)) {
+ if (ts->pids[pid]->type != MPEGTS_PES) {
av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
continue;
}
@@ -1336,7 +1517,7 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type
av_dlog(fc, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
- if (st->codec->codec_id == AV_CODEC_ID_NONE &&
+ if ((st->codec->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);
@@ -1363,7 +1544,7 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type
case 0x1F: /* FMC descriptor */
get16(pp, desc_end);
if (mp4_descr_count > 0 &&
- st->codec->codec_id == AV_CODEC_ID_AAC_LATM &&
+ (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,
@@ -1371,46 +1552,118 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type
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 */
- 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);
+ {
+ 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 */
+ if (language_count > sizeof(language) / 4) {
+ language_count = sizeof(language) / 4;
+ }
+
+ if (st->codec->extradata == NULL) {
+ if (ff_alloc_extradata(st->codec, language_count * 2)) {
+ return AVERROR(ENOMEM);
+ }
+ }
+
+ if (st->codec->extradata_size < language_count * 2)
+ return AVERROR_INVALIDDATA;
+
+ extradata = st->codec->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);
+ }
+ }
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))
- 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;
- memcpy(st->codec->extradata, *pp, 4);
+ {
+ /* 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 */
+ if (language_count > sizeof(language) / 4) {
+ language_count = sizeof(language) / 4;
+ }
+
+ if (st->codec->extradata == NULL) {
+ if (ff_alloc_extradata(st->codec, language_count * 5)) {
+ return AVERROR(ENOMEM);
+ }
+ }
+
+ if (st->codec->extradata_size < language_count * 5)
+ return AVERROR_INVALIDDATA;
+
+ extradata = st->codec->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);
}
}
- *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) {
@@ -1441,6 +1694,18 @@ 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;
}
@@ -1476,6 +1741,8 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
if (h->tid != PMT_TID)
return;
+ if (ts->skip_changes)
+ return;
clear_program(ts, h->id);
pcr_pid = get16(&p, p_end);
@@ -1483,6 +1750,7 @@ 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);
@@ -1519,7 +1787,9 @@ 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;
+
+ set_pmt_found(ts, h->id);
for (;;) {
@@ -1530,14 +1800,18 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
break;
pid = get16(&p, p_end);
if (pid < 0)
- break;
+ goto out;
pid &= 0x1fff;
+ if (pid == ts->current_pid)
+ goto out;
/* 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;
@@ -1547,6 +1821,8 @@ 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 {
@@ -1555,6 +1831,8 @@ 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;
}
@@ -1572,11 +1850,11 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
desc_list_len = get16(&p, p_end);
if (desc_list_len < 0)
- break;
+ goto out;
desc_list_len &= 0xfff;
desc_list_end = p + desc_list_len;
if (desc_list_end > p_end)
- break;
+ goto out;
for (;;) {
if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
desc_list_end, mp4_descr,
@@ -1593,6 +1871,9 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
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);
@@ -1604,6 +1885,7 @@ 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);
@@ -1614,6 +1896,10 @@ static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
return;
if (h->tid != PAT_TID)
return;
+ if (ts->skip_changes)
+ return;
+
+ ts->stream->ts_id = h->id;
clear_programs(ts);
for (;;) {
@@ -1625,20 +1911,42 @@ 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 && !ts->skip_clear)
+ clear_avprogram(ts, ts->stream->programs[j]->id);
+ }
+ }
}
static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
@@ -1658,6 +1966,8 @@ static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
return;
if (h->tid != SDT_TID)
return;
+ if (ts->skip_changes)
+ return;
onid = get16(&p, p_end);
if (onid < 0)
return;
@@ -1719,6 +2029,9 @@ 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)
{
@@ -1739,6 +2052,7 @@ 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 */
@@ -1759,7 +2073,7 @@ 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) {
@@ -1768,20 +2082,25 @@ static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
}
}
- if (!has_payload)
- return 0;
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)
+ if (p >= p_end || !has_payload)
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) {
@@ -1808,17 +2127,69 @@ static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
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) {
+ 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) {
+ if (ts->stream->nb_streams > 1 || 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 ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
- pos - ts->raw_packet_size)) < 0)
- return ret;
+ 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)
@@ -1829,10 +2200,11 @@ static int mpegts_resync(AVFormatContext *s)
for (i = 0; i < ts->resync_size; i++) {
c = avio_r8(pb);
- if (pb->eof_reached)
+ if (avio_feof(pb))
return AVERROR_EOF;
if (c == 0x47) {
avio_seek(pb, -1, SEEK_CUR);
+ reanalyze(s->priv_data);
return 0;
}
}
@@ -1856,7 +2228,9 @@ static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
/* check packet sync byte */
if ((*data)[0] != 0x47) {
/* find a new packet start */
- avio_seek(pb, -TS_PACKET_SIZE, SEEK_CUR);
+ uint64_t pos = avio_tell(pb);
+ avio_seek(pb, -FFMIN(raw_packet_size, pos), SEEK_CUR);
+
if (mpegts_resync(s) < 0)
return AVERROR(EAGAIN);
else
@@ -1876,12 +2250,13 @@ static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
avio_skip(pb, skip);
}
-static int handle_packets(MpegTSContext *ts, int nb_packets)
+static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
{
AVFormatContext *s = ts->stream;
uint8_t packet[TS_PACKET_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
const uint8_t *data;
- int packet_num, ret = 0;
+ int64_t packet_num;
+ int ret = 0;
if (avio_tell(s->pb) != ts->last_pos) {
int i;
@@ -1896,6 +2271,7 @@ static int handle_packets(MpegTSContext *ts, int nb_packets)
pes->state = MPEGTS_SKIP; /* skip until pes header */
}
ts->pids[i]->last_cc = -1;
+ ts->pids[i]->last_pcr = -1;
}
}
}
@@ -1904,11 +2280,15 @@ 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;
@@ -1924,30 +2304,33 @@ 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 AVERROR_INVALIDDATA;
- 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);
+ }
- /* 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;
+ sumscore = sumscore * CHECK_COUNT / check_count;
+ maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
+
+ 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 AVERROR_INVALIDDATA;
}
@@ -1980,24 +2363,33 @@ static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
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;
+ int64_t pos, probesize = s->probesize ? s->probesize : s->probesize2;
- /* read the first 1024 bytes to get packet size */
+ ffio_ensure_seekback(pb, probesize);
+
+ /* read the first 8192 bytes to get packet size */
pos = avio_tell(pb);
len = avio_read(pb, buf, sizeof(buf));
- if (len < 0)
- return len;
- if (len != sizeof(buf))
- return AVERROR_BUG;
- ts->raw_packet_size = get_packet_size(buf, sizeof(buf));
- if (ts->raw_packet_size <= 0)
- return AVERROR_INVALIDDATA;
+ 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;
@@ -2005,14 +2397,13 @@ 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);
mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
- handle_packets(ts, s->probesize / ts->raw_packet_size);
+ handle_packets(ts, probesize / ts->raw_packet_size);
/* if could not find service, enable auto_guess */
ts->auto_guess = 1;
@@ -2072,7 +2463,7 @@ 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;
}
@@ -2135,6 +2526,7 @@ static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
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) {
@@ -2171,7 +2563,7 @@ 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;
@@ -2179,74 +2571,69 @@ static int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
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;
+ int pos47 = ts->pos47_full % ts->raw_packet_size;
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)
+ ((*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;
- int ret;
-
- ret = ff_seek_frame_binary(s, stream_index, target_ts, flags);
- if (ret < 0)
- return ret;
-
- pos = avio_tell(s->pb);
-
- for (;;) {
- avio_seek(s->pb, pos, SEEK_SET);
- ret = avio_read(s->pb, buf, 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;
+ 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 ret;
- if (ret != TS_PACKET_SIZE)
- return AVERROR_EOF;
- // pid = AV_RB16(buf + 1) & 0x1fff;
- if (buf[1] & 0x40)
- break;
- pos += ts->raw_packet_size;
+ 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;
}
/**************************************************************/
/* parsing functions - called from other demuxers such as RTP */
-MpegTSContext *ff_mpegts_parse_open(AVFormatContext *s)
+MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
{
MpegTSContext *ts;
@@ -2257,22 +2644,23 @@ 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;
}
/* return the consumed length if a packet was output, or -1 if no
* packet is output */
-int ff_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
- const uint8_t *buf, int len)
+int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
+ const uint8_t *buf, int len)
{
int len1;
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 AVERROR_INVALIDDATA;
if (buf[0] != 0x47) {
@@ -2282,12 +2670,14 @@ 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;
}
-void ff_mpegts_parse_close(MpegTSContext *ts)
+void avpriv_mpegts_parse_close(MpegTSContext *ts)
{
mpegts_free(ts);
av_free(ts);
@@ -2301,8 +2691,7 @@ 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,
};
@@ -2314,8 +2703,7 @@ 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 2024-11-10 21:45:45 +0000