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/* |
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* MPEG2 transport stream (aka DVB) demuxer |
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* Copyright (c) 2002-2003 Fabrice Bellard |
fe9cf0d4 |
* |
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* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/crc.h" |
6a5d31ac |
#include "libavutil/intreadwrite.h" |
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#include "libavutil/log.h" |
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#include "libavutil/dict.h" |
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#include "libavutil/mathematics.h" |
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#include "libavutil/opt.h" |
7846280d |
#include "libavutil/avassert.h" |
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#include "libavcodec/bytestream.h" |
ca65932b |
#include "libavcodec/get_bits.h" |
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#include "avformat.h" |
5dbafeb7 |
#include "mpegts.h" |
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#include "internal.h" |
ae99313a |
#include "avio_internal.h" |
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#include "seek.h" |
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#include "mpeg.h" |
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#include "isom.h" |
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|
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/* maximum size in which we look for synchronisation if
synchronisation is lost */ |
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#define MAX_RESYNC_SIZE 65536 |
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|
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#define MAX_PES_PAYLOAD 200*1024
|
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#define MAX_MP4_DESCR_COUNT 16
|
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enum MpegTSFilterType {
MPEGTS_PES,
MPEGTS_SECTION, |
fe9cf0d4 |
};
|
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typedef struct MpegTSFilter MpegTSFilter;
|
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typedef int PESCallback(MpegTSFilter *f, const uint8_t *buf, int len, int is_start, int64_t pos); |
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|
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typedef struct MpegTSPESFilter {
PESCallback *pes_cb;
void *opaque;
} MpegTSPESFilter;
|
b474d1f3 |
typedef void SectionCallback(MpegTSFilter *f, const uint8_t *buf, int len); |
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typedef void SetServiceCallback(void *opaque, int ret);
typedef struct MpegTSSectionFilter {
int section_index;
int section_h_size;
uint8_t *section_buf; |
72e043dd |
unsigned int check_crc:1;
unsigned int end_of_section_reached:1; |
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SectionCallback *section_cb;
void *opaque;
} MpegTSSectionFilter;
|
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struct MpegTSFilter { |
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int pid; |
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int es_id; |
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int last_cc; /* last cc code (-1 if first packet) */ |
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enum MpegTSFilterType type;
union {
MpegTSPESFilter pes_filter;
MpegTSSectionFilter section_filter;
} u; |
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}; |
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|
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#define MAX_PIDS_PER_PROGRAM 64 |
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struct Program { |
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unsigned int id; //program id/service id
unsigned int nb_pids;
unsigned int pids[MAX_PIDS_PER_PROGRAM]; |
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}; |
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|
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struct MpegTSContext { |
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const AVClass *class; |
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/* user data */
AVFormatContext *stream; |
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/** raw packet size, including FEC if present */
int raw_packet_size; |
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int pos47;
|
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/** if true, all pids are analyzed to find streams */
int auto_guess; |
5dbafeb7 |
|
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/** compute exact PCR for each transport stream packet */
int mpeg2ts_compute_pcr; |
b45a7a18 |
|
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int64_t cur_pcr; /**< used to estimate the exact PCR */
int pcr_incr; /**< used to estimate the exact PCR */ |
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|
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/* data needed to handle file based ts */ |
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/** stop parsing loop */
int stop_parse;
/** packet containing Audio/Video data */
AVPacket *pkt; |
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/** to detect seek */
int64_t last_pos; |
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/******************************************/
/* private mpegts data */
/* scan context */ |
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/** structure to keep track of Program->pids mapping */
unsigned int nb_prg; |
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struct Program *prg; |
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|
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int8_t crc_validity[NB_PID_MAX]; |
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|
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/** filters for various streams specified by PMT + for the PAT and PMT */ |
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MpegTSFilter *pids[NB_PID_MAX]; |
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int current_pid; |
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}; |
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|
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static const AVOption options[] = { |
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{"compute_pcr", "Compute exact PCR for each transport stream packet.", offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_INT, |
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{.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, |
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{ NULL },
};
static const AVClass mpegtsraw_class = {
.class_name = "mpegtsraw demuxer",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
|
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/* TS stream handling */
enum MpegTSState {
MPEGTS_HEADER = 0, |
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MPEGTS_PESHEADER, |
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MPEGTS_PESHEADER_FILL,
MPEGTS_PAYLOAD,
MPEGTS_SKIP,
};
/* enough for PES header + length */ |
b2984add |
#define PES_START_SIZE 6
#define PES_HEADER_SIZE 9 |
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#define MAX_PES_HEADER_SIZE (9 + 255)
|
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typedef struct PESContext { |
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int pid; |
dbf6b678 |
int pcr_pid; /**< if -1 then all packets containing PCR are considered */ |
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int stream_type;
MpegTSContext *ts;
AVFormatContext *stream;
AVStream *st; |
63380b5e |
AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */ |
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enum MpegTSState state;
/* used to get the format */
int data_index; |
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int flags; /**< copied to the AVPacket flags */ |
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int total_size;
int pes_header_size; |
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int extended_stream_id; |
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int64_t pts, dts; |
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int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */ |
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uint8_t header[MAX_PES_HEADER_SIZE]; |
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uint8_t *buffer; |
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SLConfigDescr sl; |
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} PESContext; |
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|
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extern AVInputFormat ff_mpegts_demuxer; |
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|
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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;
}
|
172d1171 |
static void clear_program(MpegTSContext *ts, unsigned int programid)
{
int i;
|
4c41fc88 |
clear_avprogram(ts, programid); |
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for(i=0; i<ts->nb_prg; i++)
if(ts->prg[i].id == programid)
ts->prg[i].nb_pids = 0;
}
static void clear_programs(MpegTSContext *ts)
{
av_freep(&ts->prg);
ts->nb_prg=0;
}
static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
{ |
8c39a758 |
struct Program *p;
void *tmp = av_realloc(ts->prg, (ts->nb_prg+1)*sizeof(struct Program)); |
172d1171 |
if(!tmp)
return;
ts->prg = tmp;
p = &ts->prg[ts->nb_prg];
p->id = programid;
p->nb_pids = 0;
ts->nb_prg++;
}
static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid, unsigned int pid)
{
int i; |
8c39a758 |
struct Program *p = NULL; |
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for(i=0; i<ts->nb_prg; i++) {
if(ts->prg[i].id == programid) {
p = &ts->prg[i];
break;
}
}
if(!p)
return;
if(p->nb_pids >= MAX_PIDS_PER_PROGRAM)
return;
p->pids[p->nb_pids++] = pid;
}
|
5501afa6 |
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;
}
}
}
|
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/** |
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* @brief discard_pid() decides if the pid is to be discarded according |
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* to caller's programs selection |
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* @param ts : - TS context
* @param pid : - pid
* @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL |
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* 0 otherwise
*/
static int discard_pid(MpegTSContext *ts, unsigned int pid)
{
int i, j, k;
int used = 0, discarded = 0; |
8c39a758 |
struct Program *p; |
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for(i=0; i<ts->nb_prg; i++) {
p = &ts->prg[i];
for(j=0; j<p->nb_pids; j++) {
if(p->pids[j] != pid)
continue;
//is program with id p->id set to be discarded?
for(k=0; k<ts->stream->nb_programs; k++) {
if(ts->stream->programs[k]->id == p->id) {
if(ts->stream->programs[k]->discard == AVDISCARD_ALL)
discarded++;
else
used++;
}
}
}
}
|
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return !used && discarded; |
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}
|
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/** |
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* Assemble PES packets out of TS packets, and then call the "section_cb" |
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* function when they are complete.
*/ |
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static void write_section_data(AVFormatContext *s, MpegTSFilter *tss1,
const uint8_t *buf, int buf_size, int is_start)
{ |
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MpegTSContext *ts = s->priv_data; |
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MpegTSSectionFilter *tss = &tss1->u.section_filter;
int len; |
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|
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if (is_start) {
memcpy(tss->section_buf, buf, buf_size);
tss->section_index = buf_size;
tss->section_h_size = -1;
tss->end_of_section_reached = 0;
} else {
if (tss->end_of_section_reached)
return;
len = 4096 - tss->section_index;
if (buf_size < len)
len = buf_size;
memcpy(tss->section_buf + tss->section_index, buf, len);
tss->section_index += len;
}
/* compute section length if possible */
if (tss->section_h_size == -1 && tss->section_index >= 3) { |
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len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3; |
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if (len > 4096)
return;
tss->section_h_size = len;
}
if (tss->section_h_size != -1 && tss->section_index >= tss->section_h_size) { |
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int crc_valid = 1; |
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tss->end_of_section_reached = 1; |
f464b02d |
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) |
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tss->section_cb(tss1, tss->section_buf, tss->section_h_size); |
5dbafeb7 |
}
}
|
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static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, unsigned int pid, |
5dbafeb7 |
SectionCallback *section_cb, void *opaque,
int check_crc)
{
MpegTSFilter *filter;
MpegTSSectionFilter *sec; |
115329f1 |
|
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av_dlog(ts->stream, "Filter: pid=0x%x\n", pid); |
ebcf352a |
|
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if (pid >= NB_PID_MAX || ts->pids[pid])
return NULL;
filter = av_mallocz(sizeof(MpegTSFilter)); |
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if (!filter) |
5dbafeb7 |
return NULL;
ts->pids[pid] = filter;
filter->type = MPEGTS_SECTION;
filter->pid = pid; |
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filter->es_id = -1; |
5dbafeb7 |
filter->last_cc = -1;
sec = &filter->u.section_filter;
sec->section_cb = section_cb;
sec->opaque = opaque;
sec->section_buf = av_malloc(MAX_SECTION_SIZE);
sec->check_crc = check_crc;
if (!sec->section_buf) {
av_free(filter);
return NULL;
}
return filter;
}
|
7b49ce2e |
static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid, |
5dbafeb7 |
PESCallback *pes_cb,
void *opaque)
{
MpegTSFilter *filter;
MpegTSPESFilter *pes;
if (pid >= NB_PID_MAX || ts->pids[pid])
return NULL;
filter = av_mallocz(sizeof(MpegTSFilter)); |
115329f1 |
if (!filter) |
5dbafeb7 |
return NULL;
ts->pids[pid] = filter;
filter->type = MPEGTS_PES;
filter->pid = pid; |
c5302670 |
filter->es_id = -1; |
5dbafeb7 |
filter->last_cc = -1;
pes = &filter->u.pes_filter;
pes->pes_cb = pes_cb;
pes->opaque = opaque;
return filter;
}
|
7b49ce2e |
static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter) |
5dbafeb7 |
{
int pid;
pid = filter->pid;
if (filter->type == MPEGTS_SECTION)
av_freep(&filter->u.section_filter.section_buf); |
dcd913d9 |
else if (filter->type == MPEGTS_PES) { |
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PESContext *pes = filter->u.pes_filter.opaque;
av_freep(&pes->buffer); |
dcd913d9 |
/* referenced private data will be freed later in |
cd3716b9 |
* avformat_close_input */ |
dcd913d9 |
if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
av_freep(&filter->u.pes_filter.opaque);
}
} |
ec7d0d2e |
|
5dbafeb7 |
av_free(filter);
ts->pids[pid] = NULL;
}
|
a0b8f70c |
static int analyze(const uint8_t *buf, int size, int packet_size, int *index){ |
cf5ec607 |
int stat[TS_MAX_PACKET_SIZE]; |
a0b8f70c |
int i;
int x=0;
int best_score=0;
memset(stat, 0, packet_size*sizeof(int));
|
c6002ea1 |
for(x=i=0; i<size-3; i++){ |
7ea39638 |
if(buf[i] == 0x47 && !(buf[i+1] & 0x80) && buf[i+3] != 0x47){ |
a0b8f70c |
stat[x]++;
if(stat[x] > best_score){
best_score= stat[x];
if(index) *index= x;
}
}
x++;
if(x == packet_size) x= 0;
}
return best_score;
}
|
fe9cf0d4 |
/* autodetect fec presence. Must have at least 1024 bytes */ |
5dbafeb7 |
static int get_packet_size(const uint8_t *buf, int size) |
fe9cf0d4 |
{ |
5d4d67e0 |
int score, fec_score, dvhs_score; |
fe9cf0d4 |
if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
return -1; |
115329f1 |
|
a0b8f70c |
score = analyze(buf, size, TS_PACKET_SIZE, NULL); |
5d4d67e0 |
dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, NULL); |
a0b8f70c |
fec_score= analyze(buf, size, TS_FEC_PACKET_SIZE, NULL); |
72eaba5e |
av_dlog(NULL, "score: %d, dvhs_score: %d, fec_score: %d \n",
score, dvhs_score, fec_score); |
115329f1 |
|
5d4d67e0 |
if (score > fec_score && score > dvhs_score) return TS_PACKET_SIZE;
else if(dvhs_score > score && dvhs_score > fec_score) return TS_DVHS_PACKET_SIZE;
else if(score < fec_score && dvhs_score < fec_score) return TS_FEC_PACKET_SIZE; |
a0b8f70c |
else return -1; |
fe9cf0d4 |
}
|
5dbafeb7 |
typedef struct SectionHeader {
uint8_t tid;
uint16_t id;
uint8_t version;
uint8_t sec_num;
uint8_t last_sec_num;
} SectionHeader;
static inline int get8(const uint8_t **pp, const uint8_t *p_end) |
fe9cf0d4 |
{ |
5dbafeb7 |
const uint8_t *p;
int c;
p = *pp;
if (p >= p_end)
return -1;
c = *p++;
*pp = p;
return c; |
fe9cf0d4 |
}
|
5dbafeb7 |
static inline int get16(const uint8_t **pp, const uint8_t *p_end)
{
const uint8_t *p;
int c;
p = *pp;
if ((p + 1) >= p_end)
return -1; |
80fb8234 |
c = AV_RB16(p); |
5dbafeb7 |
p += 2;
*pp = p;
return c;
}
|
eac778de |
/* read and allocate a DVB string preceded by its length */ |
5dbafeb7 |
static char *getstr8(const uint8_t **pp, const uint8_t *p_end) |
fe9cf0d4 |
{
int len; |
5dbafeb7 |
const uint8_t *p;
char *str; |
fe9cf0d4 |
|
5dbafeb7 |
p = *pp;
len = get8(&p, p_end);
if (len < 0)
return NULL;
if ((p + len) > p_end)
return NULL;
str = av_malloc(len + 1);
if (!str)
return NULL;
memcpy(str, p, len);
str[len] = '\0';
p += len;
*pp = p;
return str;
}
|
115329f1 |
static int parse_section_header(SectionHeader *h, |
5dbafeb7 |
const uint8_t **pp, const uint8_t *p_end)
{
int val;
val = get8(pp, p_end);
if (val < 0)
return -1;
h->tid = val;
*pp += 2;
val = get16(pp, p_end);
if (val < 0)
return -1;
h->id = val;
val = get8(pp, p_end);
if (val < 0)
return -1;
h->version = (val >> 1) & 0x1f;
val = get8(pp, p_end);
if (val < 0)
return -1;
h->sec_num = val;
val = get8(pp, p_end);
if (val < 0)
return -1;
h->last_sec_num = val; |
fe9cf0d4 |
return 0; |
5dbafeb7 |
}
|
08f94e98 |
typedef struct {
uint32_t stream_type; |
72415b2a |
enum AVMediaType codec_type; |
36ef5369 |
enum AVCodecID codec_id; |
08f94e98 |
} StreamType;
static const StreamType ISO_types[] = { |
36ef5369 |
{ 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 }, |
c41bf905 |
/* Makito encoder sets stream type 0x11 for AAC,
* so auto-detect LOAS/LATM instead of hardcoding it. */ |
f8b6d481 |
#if !CONFIG_LOAS_DEMUXER
{ 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
#endif |
36ef5369 |
{ 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
{ 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
{ 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 }, |
08f94e98 |
{ 0 },
};
static const StreamType HDMV_types[] = { |
36ef5369 |
{ 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*/ |
7a72695c |
{ 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
{ 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */ |
36ef5369 |
{ 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE }, |
08f94e98 |
{ 0 },
};
/* ATSC ? */
static const StreamType MISC_types[] = { |
36ef5369 |
{ 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
{ 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, |
08f94e98 |
{ 0 },
};
static const StreamType REGD_types[] = { |
36ef5369 |
{ 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 }, |
9282fbb9 |
{ MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV }, |
36ef5369 |
{ MKTAG('V','C','-','1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 }, |
08f94e98 |
{ 0 },
};
|
6a2a50f8 |
/* descriptor present */
static const StreamType DESC_types[] = { |
36ef5369 |
{ 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 */ |
896f2b32 |
{ 0 }, |
6a2a50f8 |
};
|
08f94e98 |
static void mpegts_find_stream_type(AVStream *st,
uint32_t stream_type, const StreamType *types)
{ |
03290ffb |
if (avcodec_is_open(st->codec)) {
av_log(NULL, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
return;
}
|
08f94e98 |
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; |
1f3a1fa9 |
st->request_probe = 0; |
08f94e98 |
return;
}
}
}
|
b3f9f7a3 |
static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
uint32_t stream_type, uint32_t prog_reg_desc) |
08f94e98 |
{ |
e78d1a59 |
int old_codec_type= st->codec->codec_type;
int old_codec_id = st->codec->codec_id; |
4facddd5 |
|
8897b5aa |
if (avcodec_is_open(st->codec)) { |
4facddd5 |
av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
return 0;
}
|
c3f9ebf7 |
avpriv_set_pts_info(st, 33, 1, 90000); |
08f94e98 |
st->priv_data = pes; |
72415b2a |
st->codec->codec_type = AVMEDIA_TYPE_DATA; |
36ef5369 |
st->codec->codec_id = AV_CODEC_ID_NONE; |
08f94e98 |
st->need_parsing = AVSTREAM_PARSE_FULL;
pes->st = st; |
b3f9f7a3 |
pes->stream_type = stream_type; |
08f94e98 |
|
b3f9f7a3 |
av_log(pes->stream, AV_LOG_DEBUG,
"stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
st->index, pes->stream_type, pes->pid, (char*)&prog_reg_desc); |
08f94e98 |
|
7103a77b |
st->codec->codec_tag = pes->stream_type;
|
f2c357d9 |
mpegts_find_stream_type(st, pes->stream_type, ISO_types); |
6aaf6db2 |
if ((prog_reg_desc == AV_RL32("HDMV") ||
prog_reg_desc == AV_RL32("HDPR")) && |
36ef5369 |
st->codec->codec_id == AV_CODEC_ID_NONE) { |
f2c357d9 |
mpegts_find_stream_type(st, pes->stream_type, HDMV_types); |
63380b5e |
if (pes->stream_type == 0x83) {
// HDMV TrueHD streams also contain an AC3 coded version of the
// audio track - add a second stream for this
AVStream *sub_st;
// priv_data cannot be shared between streams
PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
if (!sub_pes) |
b3f9f7a3 |
return AVERROR(ENOMEM); |
63380b5e |
memcpy(sub_pes, pes, sizeof(*sub_pes));
|
84ad31ff |
sub_st = avformat_new_stream(pes->stream, NULL); |
63380b5e |
if (!sub_st) {
av_free(sub_pes); |
b3f9f7a3 |
return AVERROR(ENOMEM); |
63380b5e |
}
|
84ad31ff |
sub_st->id = pes->pid; |
c3f9ebf7 |
avpriv_set_pts_info(sub_st, 33, 1, 90000); |
63380b5e |
sub_st->priv_data = sub_pes; |
72415b2a |
sub_st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
36ef5369 |
sub_st->codec->codec_id = AV_CODEC_ID_AC3; |
63380b5e |
sub_st->need_parsing = AVSTREAM_PARSE_FULL;
sub_pes->sub_st = pes->sub_st = sub_st;
}
} |
36ef5369 |
if (st->codec->codec_id == AV_CODEC_ID_NONE) |
f2c357d9 |
mpegts_find_stream_type(st, pes->stream_type, MISC_types); |
7a72695c |
if (st->codec->codec_id == AV_CODEC_ID_NONE){ |
e78d1a59 |
st->codec->codec_id = old_codec_id;
st->codec->codec_type= old_codec_type;
} |
08f94e98 |
|
b3f9f7a3 |
return 0; |
08f94e98 |
} |
5dbafeb7 |
|
609d8646 |
static void new_pes_packet(PESContext *pes, AVPacket *pkt)
{
av_init_packet(pkt);
pkt->destruct = av_destruct_packet;
pkt->data = pes->buffer;
pkt->size = pes->data_index; |
50815142 |
if(pes->total_size != MAX_PES_PAYLOAD && |
65a25adc |
pes->pes_header_size + pes->data_index != pes->total_size + PES_START_SIZE) { |
03990448 |
av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n"); |
50815142 |
pes->flags |= AV_PKT_FLAG_CORRUPT;
} |
609d8646 |
memset(pkt->data+pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
// Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
pkt->stream_index = pes->sub_st->index;
else
pkt->stream_index = pes->st->index;
pkt->pts = pes->pts;
pkt->dts = pes->dts;
/* store position of first TS packet of this PES packet */
pkt->pos = pes->ts_packet_pos; |
ce9e3165 |
pkt->flags = pes->flags; |
609d8646 |
/* reset pts values */
pes->pts = AV_NOPTS_VALUE;
pes->dts = AV_NOPTS_VALUE;
pes->buffer = NULL;
pes->data_index = 0; |
ce9e3165 |
pes->flags = 0; |
609d8646 |
}
|
b2b12a10 |
static uint64_t get_ts64(GetBitContext *gb, int bits) |
ca65932b |
{ |
4a310a19 |
if (get_bits_left(gb) < bits)
return AV_NOPTS_VALUE; |
57cee850 |
return get_bits64(gb, bits); |
ca65932b |
}
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; |
e732d0f6 |
|
ca65932b |
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) |
b2b12a10 |
dts = get_ts64(&gb, sl->timestamp_len); |
ca65932b |
if (cts_flag == 1) |
b2b12a10 |
cts = get_ts64(&gb, sl->timestamp_len); |
ca65932b |
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;
|
41bdd4ad |
if (sl->timestamp_len && sl->timestamp_res)
avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res); |
ca65932b |
return (get_bits_count(&gb) + 7) >> 3;
}
|
609d8646 |
/* return non zero if a packet could be constructed */
static int mpegts_push_data(MpegTSFilter *filter,
const uint8_t *buf, int buf_size, int is_start,
int64_t pos)
{
PESContext *pes = filter->u.pes_filter.opaque;
MpegTSContext *ts = pes->ts;
const uint8_t *p;
int len, code;
if(!ts->pkt)
return 0;
if (is_start) {
if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
new_pes_packet(pes, ts->pkt);
ts->stop_parse = 1;
}
pes->state = MPEGTS_HEADER;
pes->data_index = 0;
pes->ts_packet_pos = pos;
}
p = buf;
while (buf_size > 0) {
switch(pes->state) {
case MPEGTS_HEADER:
len = PES_START_SIZE - pes->data_index;
if (len > buf_size)
len = buf_size;
memcpy(pes->header + pes->data_index, p, len);
pes->data_index += len;
p += len;
buf_size -= len;
if (pes->data_index == PES_START_SIZE) {
/* we got all the PES or section header. We can now
decide */
if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
pes->header[2] == 0x01) {
/* it must be an mpeg2 PES stream */
code = pes->header[3] | 0x100; |
9ef5a9de |
av_dlog(pes->stream, "pid=%x pes_code=%#x\n", pes->pid, code); |
609d8646 |
|
07584eaf |
if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
(!pes->sub_st || pes->sub_st->discard == AVDISCARD_ALL)) || |
609d8646 |
code == 0x1be) /* padding_stream */
goto skip;
/* stream not present in PMT */
if (!pes->st) { |
84ad31ff |
pes->st = avformat_new_stream(ts->stream, NULL); |
609d8646 |
if (!pes->st)
return AVERROR(ENOMEM); |
84ad31ff |
pes->st->id = pes->pid; |
609d8646 |
mpegts_set_stream_info(pes->st, pes, 0, 0);
}
pes->total_size = AV_RB16(pes->header + 4);
/* NOTE: a zero total size means the PES size is
unbounded */
if (!pes->total_size)
pes->total_size = MAX_PES_PAYLOAD;
/* allocate pes buffer */
pes->buffer = av_malloc(pes->total_size+FF_INPUT_BUFFER_PADDING_SIZE);
if (!pes->buffer)
return AVERROR(ENOMEM);
if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
pes->state = MPEGTS_PESHEADER; |
7a72695c |
if (pes->st->codec->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) { |
9ef5a9de |
av_dlog(pes->stream, "pid=%x stream_type=%x probing\n", |
609d8646 |
pes->pid, pes->stream_type); |
5b56ad03 |
pes->st->request_probe= 1; |
609d8646 |
}
} else {
pes->state = MPEGTS_PAYLOAD;
pes->data_index = 0;
}
} else {
/* otherwise, it should be a table */
/* skip packet */
skip:
pes->state = MPEGTS_SKIP;
continue;
}
}
break;
/**********************************************/
/* PES packing parsing */
case MPEGTS_PESHEADER:
len = PES_HEADER_SIZE - pes->data_index;
if (len < 0)
return -1;
if (len > buf_size)
len = buf_size;
memcpy(pes->header + pes->data_index, p, len);
pes->data_index += len;
p += len;
buf_size -= len;
if (pes->data_index == PES_HEADER_SIZE) {
pes->pes_header_size = pes->header[8] + 9;
pes->state = MPEGTS_PESHEADER_FILL;
}
break;
case MPEGTS_PESHEADER_FILL:
len = pes->pes_header_size - pes->data_index;
if (len < 0)
return -1;
if (len > buf_size)
len = buf_size;
memcpy(pes->header + pes->data_index, p, len);
pes->data_index += len;
p += len;
buf_size -= len;
if (pes->data_index == pes->pes_header_size) {
const uint8_t *r;
unsigned int flags, pes_ext, skip;
flags = pes->header[7];
r = pes->header + 9;
pes->pts = AV_NOPTS_VALUE;
pes->dts = AV_NOPTS_VALUE;
if ((flags & 0xc0) == 0x80) { |
e5e3897b |
pes->dts = pes->pts = ff_parse_pes_pts(r); |
609d8646 |
r += 5;
} else if ((flags & 0xc0) == 0xc0) { |
e5e3897b |
pes->pts = ff_parse_pes_pts(r); |
609d8646 |
r += 5; |
e5e3897b |
pes->dts = ff_parse_pes_pts(r); |
609d8646 |
r += 5;
}
pes->extended_stream_id = -1;
if (flags & 0x01) { /* PES extension */
pes_ext = *r++;
/* Skip PES private data, program packet sequence counter and P-STD buffer */
skip = (pes_ext >> 4) & 0xb;
skip += skip & 0x9;
r += skip;
if ((pes_ext & 0x41) == 0x01 &&
(r + 2) <= (pes->header + pes->pes_header_size)) {
/* PES extension 2 */
if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
pes->extended_stream_id = r[1];
}
}
/* we got the full header. We parse it and get the payload */
pes->state = MPEGTS_PAYLOAD;
pes->data_index = 0; |
4df36969 |
if (pes->stream_type == 0x12 && buf_size > 0) { |
ca65932b |
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;
} |
609d8646 |
}
break;
case MPEGTS_PAYLOAD:
if (buf_size > 0 && pes->buffer) { |
74f72620 |
if (pes->data_index > 0 && pes->data_index+buf_size > pes->total_size) { |
609d8646 |
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; |
74f72620 |
} 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; |
609d8646 |
}
memcpy(pes->buffer+pes->data_index, p, buf_size);
pes->data_index += buf_size;
}
buf_size = 0; |
b74f67eb |
/* 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 |
65a25adc |
* in the pes header, i.e. not counting the first PES_START_SIZE bytes */ |
4ea02a9a |
if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD && |
65a25adc |
pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) { |
b74f67eb |
ts->stop_parse = 1;
new_pes_packet(pes, ts->pkt);
} |
609d8646 |
break;
case MPEGTS_SKIP:
buf_size = 0;
break;
}
}
return 0;
}
static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
{
MpegTSFilter *tss;
PESContext *pes;
/* if no pid found, then add a pid context */
pes = av_mallocz(sizeof(PESContext));
if (!pes)
return 0;
pes->ts = ts;
pes->stream = ts->stream;
pes->pid = pid;
pes->pcr_pid = pcr_pid;
pes->state = MPEGTS_SKIP;
pes->pts = AV_NOPTS_VALUE;
pes->dts = AV_NOPTS_VALUE;
tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
if (!tss) {
av_free(pes);
return 0;
}
return pes;
}
|
fec28364 |
#define MAX_LEVEL 4
typedef struct {
AVFormatContext *s; |
ae628ec1 |
AVIOContext pb; |
fec28364 |
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);
}
|
c5302670 |
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;
}
}
|
fec28364 |
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); |
ca65932b |
update_offsets(&d->pb, &off, &len);
if (len > 0)
parse_mp4_descr(d, off, len, MP4SLDescrTag); |
fec28364 |
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;
}
|
ca65932b |
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 { |
d07de6d7 |
av_log_missing_feature(d->s, "Predefined SLConfigDescriptor", 0); |
ca65932b |
}
return 0;
}
|
fec28364 |
static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
int target_tag) { |
798c6fac |
int tag; |
fec28364 |
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; |
c5302670 |
case MP4ODescrTag:
parse_MP4ODescrTag(d, off, len1);
break; |
fec28364 |
case MP4ESDescrTag:
parse_MP4ESDescrTag(d, off, len1);
break;
case MP4DecConfigDescrTag:
parse_MP4DecConfigDescrTag(d, off, len1);
break; |
ca65932b |
case MP4SLDescrTag:
parse_MP4SLDescrTag(d, off, len1);
break; |
798c6fac |
} |
fec28364 |
done:
d->level--;
avio_seek(&d->pb, off + len1, SEEK_SET);
return 0;
}
|
8ee764b0 |
static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size, |
fec28364 |
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; |
798c6fac |
return 0;
}
|
c5302670 |
static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
Mp4Descr *descr, int *descr_count, int max_descr_count) |
798c6fac |
{ |
c5302670 |
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;
}
|
ca65932b |
static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, int section_len) |
c5302670 |
{ |
ca65932b |
MpegTSContext *ts = filter->u.section_filter.opaque;
SectionHeader h;
const uint8_t *p, *p_end; |
471fe57e |
AVIOContext pb; |
c5302670 |
Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = {{ 0 }};
int mp4_descr_count = 0;
int i, pid; |
ca65932b |
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; |
c5302670 |
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;
}
|
ca65932b |
pes->sl = mp4_descr[i].sl;
|
c5302670 |
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); |
36ef5369 |
if (st->codec->codec_id == AV_CODEC_ID_AAC && |
c5302670 |
st->codec->extradata_size > 0)
st->need_parsing = 0; |
36ef5369 |
if (st->codec->codec_id == AV_CODEC_ID_H264 && |
c5302670 |
st->codec->extradata_size > 0)
st->need_parsing = 0;
|
36ef5369 |
if (st->codec->codec_id <= AV_CODEC_ID_NONE) {
} else if (st->codec->codec_id < AV_CODEC_ID_FIRST_AUDIO) { |
c5302670 |
st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
36ef5369 |
} else if (st->codec->codec_id < AV_CODEC_ID_FIRST_SUBTITLE) { |
c5302670 |
st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
36ef5369 |
} else if (st->codec->codec_id < AV_CODEC_ID_FIRST_UNKNOWN) { |
c5302670 |
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; |
798c6fac |
}
}
} |
c5302670 |
for (i = 0; i < mp4_descr_count; i++)
av_free(mp4_descr[i].dec_config_descr); |
798c6fac |
}
|
cc9038e9 |
int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
const uint8_t **pp, const uint8_t *desc_list_end, |
4682a1dc |
Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
MpegTSContext *ts) |
cc9038e9 |
{
const uint8_t *desc_end; |
476d04a5 |
int desc_len, desc_tag, desc_es_id; |
b543e1dc |
char language[252];
int i; |
cc9038e9 |
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;
|
9ef5a9de |
av_dlog(fc, "tag: 0x%02x len=%d\n", desc_tag, desc_len); |
cc9038e9 |
|
36ef5369 |
if (st->codec->codec_id == AV_CODEC_ID_NONE && |
cc9038e9 |
stream_type == STREAM_TYPE_PRIVATE_DATA)
mpegts_find_stream_type(st, desc_tag, DESC_types);
switch(desc_tag) { |
476d04a5 |
case 0x1E: /* SL descriptor */
desc_es_id = get16(pp, desc_end); |
c5302670 |
if (ts && ts->pids[pid])
ts->pids[pid]->es_id = desc_es_id; |
c3bc6096 |
for (i = 0; i < mp4_descr_count; i++)
if (mp4_descr[i].dec_config_descr_len &&
mp4_descr[i].es_id == desc_es_id) { |
476d04a5 |
AVIOContext pb; |
c3bc6096 |
ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
mp4_descr[i].dec_config_descr_len, 0, NULL, NULL, NULL, NULL); |
476d04a5 |
ff_mp4_read_dec_config_descr(fc, st, &pb); |
36ef5369 |
if (st->codec->codec_id == AV_CODEC_ID_AAC && |
476d04a5 |
st->codec->extradata_size > 0)
st->need_parsing = 0; |
36ef5369 |
if (st->codec->codec_id == AV_CODEC_ID_MPEG4SYSTEMS) |
4682a1dc |
mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1); |
476d04a5 |
}
break; |
cc9038e9 |
case 0x1F: /* FMC descriptor */
get16(pp, desc_end); |
7a72695c |
if (mp4_descr_count > 0 && (st->codec->codec_id == AV_CODEC_ID_AAC_LATM || st->request_probe>0) && |
c3bc6096 |
mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) { |
471fe57e |
AVIOContext pb; |
c3bc6096 |
ffio_init_context(&pb, mp4_descr->dec_config_descr,
mp4_descr->dec_config_descr_len, 0, NULL, NULL, NULL, NULL); |
cc9038e9 |
ff_mp4_read_dec_config_descr(fc, st, &pb); |
36ef5369 |
if (st->codec->codec_id == AV_CODEC_ID_AAC && |
c643ba81 |
st->codec->extradata_size > 0){
st->request_probe= st->need_parsing = 0;
st->codec->codec_type= AVMEDIA_TYPE_AUDIO;
} |
cc9038e9 |
}
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; |
d2d67e42 |
av_dict_set(&st->metadata, "language", language, 0); |
cc9038e9 |
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; |
a2fc93f7 |
/* 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;
} |
cc9038e9 |
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; |
d2d67e42 |
av_dict_set(&st->metadata, "language", language, 0); |
cc9038e9 |
break;
case 0x0a: /* ISO 639 language descriptor */ |
b543e1dc |
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] = ','; |
e2db6b59 |
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;
} |
b543e1dc |
}
if (i) {
language[i - 1] = 0; |
d2d67e42 |
av_dict_set(&st->metadata, "language", language, 0); |
b543e1dc |
} |
cc9038e9 |
break;
case 0x05: /* registration descriptor */
st->codec->codec_tag = bytestream_get_le32(pp); |
9ef5a9de |
av_dlog(fc, "reg_desc=%.4s\n", (char*)&st->codec->codec_tag); |
36ef5369 |
if (st->codec->codec_id == AV_CODEC_ID_NONE) |
cc9038e9 |
mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
break; |
fa12fb3b |
case 0x52: /* stream identifier descriptor */
st->stream_identifier = 1 + get8(pp, desc_end);
break; |
cc9038e9 |
default:
break;
}
*pp = desc_end;
return 0;
}
|
4d9a577e |
static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len) |
5dbafeb7 |
{ |
4d9a577e |
MpegTSContext *ts = filter->u.section_filter.opaque; |
5dbafeb7 |
SectionHeader h1, *h = &h1; |
c6ec28b1 |
PESContext *pes;
AVStream *st; |
cc9038e9 |
const uint8_t *p, *p_end, *desc_list_end; |
c6ec28b1 |
int program_info_length, pcr_pid, pid, stream_type; |
cc9038e9 |
int desc_list_len; |
8430f3ec |
uint32_t prog_reg_desc = 0; /* registration descriptor */ |
c3bc6096 |
Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = {{ 0 }};
int mp4_descr_count = 0;
int i; |
115329f1 |
|
9ef5a9de |
av_dlog(ts->stream, "PMT: len %i\n", section_len); |
15d35bee |
hex_dump_debug(ts->stream, section, section_len); |
ebcf352a |
|
5dbafeb7 |
p_end = section + section_len - 4;
p = section;
if (parse_section_header(h, &p, p_end) < 0)
return; |
ebcf352a |
|
9ef5a9de |
av_dlog(ts->stream, "sid=0x%x sec_num=%d/%d\n", |
2ddb79be |
h->id, h->sec_num, h->last_sec_num); |
ebcf352a |
|
90d13e30 |
if (h->tid != PMT_TID) |
5dbafeb7 |
return;
|
172d1171 |
clear_program(ts, h->id); |
c9024a9f |
pcr_pid = get16(&p, p_end); |
5dbafeb7 |
if (pcr_pid < 0)
return; |
c9024a9f |
pcr_pid &= 0x1fff; |
172d1171 |
add_pid_to_pmt(ts, h->id, pcr_pid); |
5501afa6 |
set_pcr_pid(ts->stream, h->id, pcr_pid); |
ebcf352a |
|
9ef5a9de |
av_dlog(ts->stream, "pcr_pid=0x%x\n", pcr_pid); |
ebcf352a |
|
c9024a9f |
program_info_length = get16(&p, p_end); |
5dbafeb7 |
if (program_info_length < 0)
return; |
c9024a9f |
program_info_length &= 0xfff; |
a45b40c4 |
while(program_info_length >= 2) {
uint8_t tag, len;
tag = get8(&p, p_end);
len = get8(&p, p_end); |
798c6fac |
|
9ef5a9de |
av_dlog(ts->stream, "program tag: 0x%02x len=%d\n", tag, len); |
798c6fac |
|
a45b40c4 |
if(len > program_info_length - 2)
//something else is broken, exit the program_descriptors_loop
break;
program_info_length -= len + 2; |
798c6fac |
if (tag == 0x1d) { // IOD descriptor
get8(&p, p_end); // scope
get8(&p, p_end); // label
len -= 2; |
fec28364 |
mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
&mp4_descr_count, MAX_MP4_DESCR_COUNT); |
798c6fac |
} else if (tag == 0x05 && len >= 4) { // registration descriptor |
8430f3ec |
prog_reg_desc = bytestream_get_le32(&p); |
a45b40c4 |
len -= 4;
}
p += len;
} |
5dbafeb7 |
p += program_info_length;
if (p >= p_end) |
175272cb |
goto out; |
d46c84ea |
// stop parsing after pmt, we found header
if (!ts->stream->nb_streams) |
49ec0c81 |
ts->stop_parse = 2; |
d46c84ea |
|
5dbafeb7 |
for(;;) { |
c6ec28b1 |
st = 0; |
4682a1dc |
pes = NULL; |
5dbafeb7 |
stream_type = get8(&p, p_end);
if (stream_type < 0)
break; |
c9024a9f |
pid = get16(&p, p_end); |
5dbafeb7 |
if (pid < 0)
break; |
c9024a9f |
pid &= 0x1fff; |
327cd0d0 |
if (pid == ts->current_pid)
break; |
f42d1d82 |
|
124e2884 |
/* now create stream */ |
f42d1d82 |
if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
pes = ts->pids[pid]->u.pes_filter.opaque; |
84ad31ff |
if (!pes->st) {
pes->st = avformat_new_stream(pes->stream, NULL); |
7726916c |
if (!pes->st)
goto out; |
463c8d86 |
pes->st->id = pes->pid; |
84ad31ff |
} |
f42d1d82 |
st = pes->st; |
4682a1dc |
} else if (stream_type != 0x13) { |
f42d1d82 |
if (ts->pids[pid]) mpegts_close_filter(ts, ts->pids[pid]); //wrongly added sdt filter probably |
b3f9f7a3 |
pes = add_pes_stream(ts, pid, pcr_pid); |
84ad31ff |
if (pes) {
st = avformat_new_stream(pes->stream, NULL); |
7726916c |
if (!st)
goto out; |
84ad31ff |
st->id = pes->pid;
} |
4682a1dc |
} else {
int idx = ff_find_stream_index(ts->stream, pid);
if (idx >= 0) {
st = ts->stream->streams[idx];
} else { |
d9b89b23 |
st = avformat_new_stream(ts->stream, NULL); |
7726916c |
if (!st)
goto out; |
4682a1dc |
st->id = pid; |
c5302670 |
st->codec->codec_type = AVMEDIA_TYPE_DATA; |
4682a1dc |
} |
f42d1d82 |
}
if (!st) |
175272cb |
goto out; |
f42d1d82 |
|
4682a1dc |
if (pes && !pes->stream_type) |
b3f9f7a3 |
mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
|
f42d1d82 |
add_pid_to_pmt(ts, h->id, pid);
|
588af13f |
ff_program_add_stream_index(ts->stream, h->id, st->index); |
f42d1d82 |
|
c9024a9f |
desc_list_len = get16(&p, p_end); |
c6ec28b1 |
if (desc_list_len < 0)
break; |
c9024a9f |
desc_list_len &= 0xfff; |
c6ec28b1 |
desc_list_end = p + desc_list_len; |
a4d2af9b |
if (desc_list_end > p_end) |
5dbafeb7 |
break; |
c6ec28b1 |
for(;;) { |
cc9038e9 |
if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p, desc_list_end, |
4682a1dc |
mp4_descr, mp4_descr_count, pid, ts) < 0) |
798c6fac |
break; |
63380b5e |
|
4682a1dc |
if (pes && prog_reg_desc == AV_RL32("HDMV") && stream_type == 0x83 && pes->sub_st) { |
588af13f |
ff_program_add_stream_index(ts->stream, h->id, pes->sub_st->index); |
63380b5e |
pes->sub_st->codec->codec_tag = st->codec->codec_tag;
} |
c6ec28b1 |
}
p = desc_list_end; |
5dbafeb7 |
} |
175272cb |
out: |
c3bc6096 |
for (i = 0; i < mp4_descr_count; i++)
av_free(mp4_descr[i].dec_config_descr); |
5dbafeb7 |
}
|
4d9a577e |
static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len) |
5dbafeb7 |
{ |
4d9a577e |
MpegTSContext *ts = filter->u.section_filter.opaque; |
5dbafeb7 |
SectionHeader h1, *h = &h1;
const uint8_t *p, *p_end;
int sid, pmt_pid; |
24adef14 |
AVProgram *program; |
5dbafeb7 |
|
9ef5a9de |
av_dlog(ts->stream, "PAT:\n"); |
15d35bee |
hex_dump_debug(ts->stream, section, section_len); |
43b6c3eb |
|
5dbafeb7 |
p_end = section + section_len - 4;
p = section;
if (parse_section_header(h, &p, p_end) < 0)
return;
if (h->tid != PAT_TID)
return;
|
24adef14 |
ts->stream->ts_id = h->id;
|
172d1171 |
clear_programs(ts); |
5dbafeb7 |
for(;;) {
sid = get16(&p, p_end);
if (sid < 0)
break; |
c9024a9f |
pmt_pid = get16(&p, p_end); |
5dbafeb7 |
if (pmt_pid < 0)
break; |
c9024a9f |
pmt_pid &= 0x1fff; |
ebcf352a |
|
eab022d8 |
if (pmt_pid == ts->current_pid)
break;
|
9ef5a9de |
av_dlog(ts->stream, "sid=0x%x pid=0x%x\n", sid, pmt_pid); |
ebcf352a |
|
5dbafeb7 |
if (sid == 0x0000) {
/* NIT info */
} else { |
cb340ecd |
MpegTSFilter *fil = ts->pids[pmt_pid]; |
24adef14 |
program = av_new_program(ts->stream, sid);
program->program_num = sid;
program->pmt_pid = pmt_pid; |
cb340ecd |
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); |
172d1171 |
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); |
5dbafeb7 |
}
} |
0ec86952 |
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);
}
} |
5dbafeb7 |
}
|
4d9a577e |
static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len) |
5dbafeb7 |
{ |
4d9a577e |
MpegTSContext *ts = filter->u.section_filter.opaque; |
5dbafeb7 |
SectionHeader h1, *h = &h1;
const uint8_t *p, *p_end, *desc_list_end, *desc_end;
int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
char *name, *provider_name;
|
9ef5a9de |
av_dlog(ts->stream, "SDT:\n"); |
15d35bee |
hex_dump_debug(ts->stream, section, section_len); |
5dbafeb7 |
p_end = section + section_len - 4;
p = section;
if (parse_section_header(h, &p, p_end) < 0)
return;
if (h->tid != SDT_TID)
return;
onid = get16(&p, p_end);
if (onid < 0)
return;
val = get8(&p, p_end);
if (val < 0)
return;
for(;;) {
sid = get16(&p, p_end);
if (sid < 0)
break;
val = get8(&p, p_end);
if (val < 0)
break; |
c9024a9f |
desc_list_len = get16(&p, p_end); |
5dbafeb7 |
if (desc_list_len < 0)
break; |
c9024a9f |
desc_list_len &= 0xfff; |
5dbafeb7 |
desc_list_end = p + desc_list_len;
if (desc_list_end > p_end)
break;
for(;;) {
desc_tag = get8(&p, desc_list_end);
if (desc_tag < 0)
break;
desc_len = get8(&p, desc_list_end);
desc_end = p + desc_len;
if (desc_end > desc_list_end)
break; |
ebcf352a |
|
9ef5a9de |
av_dlog(ts->stream, "tag: 0x%02x len=%d\n", |
2ddb79be |
desc_tag, desc_len); |
ebcf352a |
|
5dbafeb7 |
switch(desc_tag) {
case 0x48:
service_type = get8(&p, p_end);
if (service_type < 0)
break;
provider_name = getstr8(&p, p_end);
if (!provider_name)
break;
name = getstr8(&p, p_end); |
1d257254 |
if (name) {
AVProgram *program = av_new_program(ts->stream, sid); |
08681191 |
if(program) { |
d2d67e42 |
av_dict_set(&program->metadata, "service_name", name, 0);
av_dict_set(&program->metadata, "service_provider", provider_name, 0); |
08681191 |
} |
1d257254 |
} |
81d5ae6d |
av_free(name);
av_free(provider_name); |
5dbafeb7 |
break;
default:
break;
}
p = desc_end;
}
p = desc_list_end;
}
}
/* handle one TS packet */ |
bdfa9824 |
static int handle_packet(MpegTSContext *ts, const uint8_t *packet) |
fe9cf0d4 |
{ |
b45a7a18 |
AVFormatContext *s = ts->stream; |
5dbafeb7 |
MpegTSFilter *tss; |
8b9df201 |
int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
has_adaptation, has_payload; |
5dbafeb7 |
const uint8_t *p, *p_end; |
4c6b49bf |
int64_t pos; |
5dbafeb7 |
|
80fb8234 |
pid = AV_RB16(packet + 1) & 0x1fff; |
172d1171 |
if(pid && discard_pid(ts, pid)) |
bdfa9824 |
return 0; |
5dbafeb7 |
is_start = packet[1] & 0x40;
tss = ts->pids[pid];
if (ts->auto_guess && tss == NULL && is_start) { |
b3f9f7a3 |
add_pes_stream(ts, pid, -1); |
5dbafeb7 |
tss = ts->pids[pid];
}
if (!tss) |
bdfa9824 |
return 0; |
327cd0d0 |
ts->current_pid = pid; |
5dbafeb7 |
|
8b9df201 |
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 */
|
5dbafeb7 |
/* continuity check (currently not used) */
cc = (packet[3] & 0xf); |
8b9df201 |
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;
|
5dbafeb7 |
tss->last_cc = cc; |
ce9e3165 |
if (!cc_ok) { |
7e75f061 |
av_log(ts->stream, AV_LOG_DEBUG, |
f1f15c3c |
"Continuity check failed for pid %d expected %d got %d\n",
pid, expected_cc, cc); |
ce9e3165 |
if(tss->type == MPEGTS_PES) {
PESContext *pc = tss->u.pes_filter.opaque;
pc->flags |= AV_PKT_FLAG_CORRUPT;
}
} |
115329f1 |
|
8b9df201 |
if (!has_payload) |
bdfa9824 |
return 0; |
8b9df201 |
p = packet + 4;
if (has_adaptation) { |
eac778de |
/* skip adaptation field */ |
5dbafeb7 |
p += p[0] + 1;
}
/* if past the end of packet, ignore */
p_end = packet + TS_PACKET_SIZE;
if (p >= p_end) |
bdfa9824 |
return 0; |
115329f1 |
|
384c9c2f |
pos = avio_tell(ts->stream->pb); |
4c6b49bf |
ts->pos47= pos % ts->raw_packet_size; |
5fd63f3c |
|
5dbafeb7 |
if (tss->type == MPEGTS_SECTION) {
if (is_start) {
/* pointer field present */
len = *p++;
if (p + len > p_end) |
bdfa9824 |
return 0; |
5dbafeb7 |
if (len && cc_ok) { |
27bb1ed3 |
/* write remaining section bytes */ |
115329f1 |
write_section_data(s, tss, |
5dbafeb7 |
p, len, 0); |
27bb1ed3 |
/* check whether filter has been closed */
if (!ts->pids[pid]) |
bdfa9824 |
return 0; |
5dbafeb7 |
}
p += len;
if (p < p_end) { |
115329f1 |
write_section_data(s, tss, |
5dbafeb7 |
p, p_end - p, 1);
}
} else {
if (cc_ok) { |
115329f1 |
write_section_data(s, tss, |
5dbafeb7 |
p, p_end - p, 0); |
fc48fe84 |
} |
5dbafeb7 |
}
} else { |
bdfa9824 |
int ret; |
4c6b49bf |
// Note: The position here points actually behind the current packet. |
bdfa9824 |
if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
pos - ts->raw_packet_size)) < 0)
return ret; |
5dbafeb7 |
} |
bdfa9824 |
return 0; |
5dbafeb7 |
}
|
fc48fe84 |
/* XXX: try to find a better synchro over several packets (use
get_packet_size() ?) */ |
1303d62d |
static int mpegts_resync(AVFormatContext *s) |
fc48fe84 |
{ |
471fe57e |
AVIOContext *pb = s->pb; |
fc48fe84 |
int c, i;
for(i = 0;i < MAX_RESYNC_SIZE; i++) { |
1447dc59 |
c = avio_r8(pb);
if (url_feof(pb)) |
fc48fe84 |
return -1;
if (c == 0x47) { |
f59d8ff8 |
avio_seek(pb, -1, SEEK_CUR); |
fc48fe84 |
return 0;
}
} |
1303d62d |
av_log(s, AV_LOG_ERROR, "max resync size reached, could not find sync byte\n"); |
fc48fe84 |
/* no sync found */
return -1;
}
|
b45a7a18 |
/* return -1 if error or EOF. Return 0 if OK. */ |
1303d62d |
static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size) |
5dbafeb7 |
{ |
471fe57e |
AVIOContext *pb = s->pb; |
b45a7a18 |
int skip, len;
for(;;) { |
e63a3628 |
len = avio_read(pb, buf, TS_PACKET_SIZE); |
b45a7a18 |
if (len != TS_PACKET_SIZE) |
e006d71f |
return len < 0 ? len : AVERROR_EOF; |
eac778de |
/* check packet sync byte */ |
b45a7a18 |
if (buf[0] != 0x47) {
/* find a new packet start */ |
f59d8ff8 |
avio_seek(pb, -TS_PACKET_SIZE, SEEK_CUR); |
1303d62d |
if (mpegts_resync(s) < 0)
return AVERROR(EAGAIN); |
b45a7a18 |
else
continue;
} else {
skip = raw_packet_size - TS_PACKET_SIZE;
if (skip > 0) |
45a8a02a |
avio_skip(pb, skip); |
b45a7a18 |
break;
}
}
return 0;
}
static int handle_packets(MpegTSContext *ts, int nb_packets)
{
AVFormatContext *s = ts->stream; |
f83687bc |
uint8_t packet[TS_PACKET_SIZE + FF_INPUT_BUFFER_PADDING_SIZE]; |
cdb9884a |
int packet_num, ret = 0;
if (avio_tell(s->pb) != ts->last_pos) {
int i; |
35a68558 |
av_dlog(ts->stream, "Skipping after seek\n"); |
cdb9884a |
/* seek detected, flush pes buffer */
for (i = 0; i < NB_PID_MAX; i++) { |
162f1fbc |
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 */
} |
cdb9884a |
ts->pids[i]->last_cc = -1;
}
}
} |
5dbafeb7 |
ts->stop_parse = 0;
packet_num = 0; |
1aa70898 |
memset(packet + TS_PACKET_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE); |
fe9cf0d4 |
for(;;) { |
5dbafeb7 |
packet_num++; |
49ec0c81 |
if (nb_packets != 0 && packet_num >= nb_packets ||
ts->stop_parse > 1) {
ret = AVERROR(EAGAIN);
break;
}
if (ts->stop_parse > 0) |
5dbafeb7 |
break; |
49ec0c81 |
|
1303d62d |
ret = read_packet(s, packet, ts->raw_packet_size); |
b45a7a18 |
if (ret != 0) |
cdb9884a |
break; |
bdfa9824 |
ret = handle_packet(ts, packet);
if (ret != 0) |
cdb9884a |
break; |
5dbafeb7 |
} |
cdb9884a |
ts->last_pos = avio_tell(s->pb);
return ret; |
5dbafeb7 |
} |
fe9cf0d4 |
|
5dbafeb7 |
static int mpegts_probe(AVProbeData *p)
{ |
a0b8f70c |
const int size= p->buf_size; |
304ebed5 |
int maxscore=0;
int sumscore=0;
int i; |
1558d0b9 |
int check_count= size / TS_FEC_PACKET_SIZE; |
a0b8f70c |
#define CHECK_COUNT 10 |
304ebed5 |
#define CHECK_BLOCK 100 |
115329f1 |
|
1558d0b9 |
if (check_count < CHECK_COUNT) |
a0b8f70c |
return -1; |
115329f1 |
|
304ebed5 |
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;
av_dlog(0, "TS score: %d %d\n", sumscore, maxscore); |
115329f1 |
|
304ebed5 |
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; |
5dbafeb7 |
}
|
910f02a0 |
/* return the 90kHz PCR and the extension for the 27MHz PCR. return |
b45a7a18 |
(-1) if not available */ |
115329f1 |
static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, |
b45a7a18 |
const uint8_t *packet)
{
int afc, len, flags;
const uint8_t *p;
unsigned int v;
afc = (packet[3] >> 4) & 3;
if (afc <= 1)
return -1;
p = packet + 4;
len = p[0];
p++;
if (len == 0)
return -1;
flags = *p++;
len--;
if (!(flags & 0x10))
return -1;
if (len < 6)
return -1; |
80fb8234 |
v = AV_RB32(p); |
b45a7a18 |
*ppcr_high = ((int64_t)v << 1) | (p[4] >> 7);
*ppcr_low = ((p[4] & 1) << 8) | p[5];
return 0;
}
|
6e9651d1 |
static int mpegts_read_header(AVFormatContext *s) |
5dbafeb7 |
{
MpegTSContext *ts = s->priv_data; |
471fe57e |
AVIOContext *pb = s->pb; |
04064e1c |
uint8_t buf[8*1024]={0}; |
4dc8a963 |
int len; |
5dbafeb7 |
int64_t pos; |
e05655fb |
|
cb66db80 |
/* read the first 8192 bytes to get packet size */ |
384c9c2f |
pos = avio_tell(pb); |
e63a3628 |
len = avio_read(pb, buf, sizeof(buf)); |
04064e1c |
ts->raw_packet_size = get_packet_size(buf, len); |
90f5e991 |
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;
} |
b45a7a18 |
ts->stream = s; |
5dbafeb7 |
ts->auto_guess = 0;
|
66355be3 |
if (s->iformat == &ff_mpegts_demuxer) { |
b45a7a18 |
/* normal demux */ |
fc48fe84 |
|
da9cea77 |
/* first do a scan to get all the services */ |
1fb30586 |
/* 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) |
b2f88ce2 |
av_log(s, pb->seekable ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n"); |
c950c25a |
mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1); |
115329f1 |
|
7b9677f6 |
mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1); |
115329f1 |
|
45a49840 |
handle_packets(ts, s->probesize / ts->raw_packet_size); |
a45ec414 |
/* if could not find service, enable auto_guess */ |
115329f1 |
|
a45ec414 |
ts->auto_guess = 1; |
115329f1 |
|
9ef5a9de |
av_dlog(ts->stream, "tuning done\n"); |
ebcf352a |
|
b45a7a18 |
s->ctx_flags |= AVFMTCTX_NOHEADER;
} else {
AVStream *st;
int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
int64_t pcrs[2], pcr_h;
int packet_count[2];
uint8_t packet[TS_PACKET_SIZE]; |
115329f1 |
|
b45a7a18 |
/* only read packets */ |
115329f1 |
|
3b3bbdd3 |
st = avformat_new_stream(s, NULL); |
b45a7a18 |
if (!st)
goto fail; |
c3f9ebf7 |
avpriv_set_pts_info(st, 60, 1, 27000000); |
72415b2a |
st->codec->codec_type = AVMEDIA_TYPE_DATA; |
36ef5369 |
st->codec->codec_id = AV_CODEC_ID_MPEG2TS; |
115329f1 |
|
b45a7a18 |
/* we iterate until we find two PCRs to estimate the bitrate */
pcr_pid = -1;
nb_pcrs = 0;
nb_packets = 0;
for(;;) { |
1303d62d |
ret = read_packet(s, packet, ts->raw_packet_size); |
b45a7a18 |
if (ret < 0)
return -1; |
80fb8234 |
pid = AV_RB16(packet + 1) & 0x1fff; |
b45a7a18 |
if ((pcr_pid == -1 || pcr_pid == pid) &&
parse_pcr(&pcr_h, &pcr_l, packet) == 0) {
pcr_pid = pid;
packet_count[nb_pcrs] = nb_packets;
pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
nb_pcrs++;
if (nb_pcrs >= 2)
break;
}
nb_packets++;
} |
5dbafeb7 |
|
b45a7a18 |
/* NOTE1: the bitrate is computed without the FEC */
/* NOTE2: it is only the bitrate of the start of the stream */
ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
s->bit_rate = (TS_PACKET_SIZE * 8) * 27e6 / ts->pcr_incr; |
01f4895c |
st->codec->bit_rate = s->bit_rate; |
c0df9d75 |
st->start_time = ts->cur_pcr; |
b751f611 |
av_dlog(ts->stream, "start=%0.3f pcr=%0.3f incr=%d\n", |
045dd4b9 |
st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr); |
fe9cf0d4 |
} |
5dbafeb7 |
|
f59d8ff8 |
avio_seek(pb, pos, SEEK_SET); |
fe9cf0d4 |
return 0; |
5dbafeb7 |
fail:
return -1;
}
|
b45a7a18 |
#define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
static int mpegts_raw_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
MpegTSContext *ts = s->priv_data;
int ret, i;
int64_t pcr_h, next_pcr_h, pos;
int pcr_l, next_pcr_l;
uint8_t pcr_buf[12];
if (av_new_packet(pkt, TS_PACKET_SIZE) < 0) |
8fa36ae0 |
return AVERROR(ENOMEM); |
384c9c2f |
pkt->pos= avio_tell(s->pb); |
1303d62d |
ret = read_packet(s, pkt->data, ts->raw_packet_size); |
b45a7a18 |
if (ret < 0) {
av_free_packet(pkt);
return ret;
}
if (ts->mpeg2ts_compute_pcr) {
/* compute exact PCR for each packet */
if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
/* we read the next PCR (XXX: optimize it by using a bigger buffer */ |
384c9c2f |
pos = avio_tell(s->pb); |
b45a7a18 |
for(i = 0; i < MAX_PACKET_READAHEAD; i++) { |
f59d8ff8 |
avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET); |
e63a3628 |
avio_read(s->pb, pcr_buf, 12); |
b45a7a18 |
if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
/* XXX: not precise enough */ |
115329f1 |
ts->pcr_incr = ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) / |
b45a7a18 |
(i + 1);
break;
}
} |
f59d8ff8 |
avio_seek(s->pb, pos, SEEK_SET); |
b45a7a18 |
/* no next PCR found: we use previous increment */
ts->cur_pcr = pcr_h * 300 + pcr_l;
}
pkt->pts = ts->cur_pcr;
pkt->duration = ts->pcr_incr;
ts->cur_pcr += ts->pcr_incr;
}
pkt->stream_index = 0;
return 0;
}
|
5dbafeb7 |
static int mpegts_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
MpegTSContext *ts = s->priv_data; |
0c137557 |
int ret, i;
|
df8aa459 |
pkt->size = -1; |
38c48be2 |
ts->pkt = pkt; |
0c137557 |
ret = handle_packets(ts, 0);
if (ret < 0) { |
5710dbf8 |
av_free_packet(ts->pkt); |
0c137557 |
/* flush pes data left */
for (i = 0; i < NB_PID_MAX; i++) {
if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
new_pes_packet(pes, pkt); |
8956f680 |
pes->state = MPEGTS_SKIP; |
0c137557 |
ret = 0;
break;
}
}
}
}
|
df8aa459 |
if (!ret && pkt->size < 0)
ret = AVERROR(EINTR); |
0c137557 |
return ret; |
fe9cf0d4 |
}
|
a717f990 |
static void mpegts_free(MpegTSContext *ts) |
fe9cf0d4 |
{
int i; |
81d5ae6d |
clear_programs(ts);
|
fe9cf0d4 |
for(i=0;i<NB_PID_MAX;i++) |
ec7d0d2e |
if (ts->pids[i]) mpegts_close_filter(ts, ts->pids[i]); |
a717f990 |
} |
00a6b92b |
|
a717f990 |
static int mpegts_read_close(AVFormatContext *s)
{
MpegTSContext *ts = s->priv_data;
mpegts_free(ts); |
fe9cf0d4 |
return 0;
}
|
11bc5580 |
static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index, |
cdd5034f |
int64_t *ppos, int64_t pos_limit) |
27f388aa |
{
MpegTSContext *ts = s->priv_data;
int64_t pos, timestamp;
uint8_t buf[TS_PACKET_SIZE]; |
dbf6b678 |
int pcr_l, pcr_pid = ((PESContext*)s->streams[stream_index]->priv_data)->pcr_pid; |
5fd63f3c |
pos = ((*ppos + ts->raw_packet_size - 1 - ts->pos47) / ts->raw_packet_size) * ts->raw_packet_size + ts->pos47; |
62142663 |
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; |
9fa47cb7 |
if (buf[0] != 0x47) { |
04ac0d79 |
if (mpegts_resync(s) < 0) |
9fa47cb7 |
return AV_NOPTS_VALUE; |
63b796b0 |
pos = avio_tell(s->pb); |
9fa47cb7 |
continue;
} |
62142663 |
if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
parse_pcr(×tamp, &pcr_l, buf) == 0) {
*ppos = pos;
return timestamp; |
27f388aa |
} |
62142663 |
pos += ts->raw_packet_size;
} |
27f388aa |
|
880e8382 |
return AV_NOPTS_VALUE; |
27f388aa |
}
|
de9862a9 |
static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
int64_t *ppos, int64_t pos_limit)
{
MpegTSContext *ts = s->priv_data; |
b6ffceef |
int64_t pos; |
de9862a9 |
pos = ((*ppos + ts->raw_packet_size - 1 - ts->pos47) / ts->raw_packet_size) * ts->raw_packet_size + ts->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); |
db1347f6 |
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){
*ppos= pkt.pos;
return pkt.dts;
} |
de9862a9 |
}
pos = pkt.pos;
}
return AV_NOPTS_VALUE;
}
|
b45a7a18 |
/**************************************************************/
/* parsing functions - called from other demuxers such as RTP */
|
9125806e |
MpegTSContext *ff_mpegts_parse_open(AVFormatContext *s) |
b45a7a18 |
{
MpegTSContext *ts; |
115329f1 |
|
b45a7a18 |
ts = av_mallocz(sizeof(MpegTSContext));
if (!ts)
return NULL;
/* no stream case, currently used by RTP */
ts->raw_packet_size = TS_PACKET_SIZE;
ts->stream = s;
ts->auto_guess = 1; |
c8ce2b0a |
mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
|
b45a7a18 |
return ts;
}
/* return the consumed length if a packet was output, or -1 if no
packet is output */ |
9125806e |
int ff_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt, |
b45a7a18 |
const uint8_t *buf, int len)
{
int len1;
len1 = len;
ts->pkt = pkt;
for(;;) { |
bc38e837 |
ts->stop_parse = 0; |
b45a7a18 |
if (len < TS_PACKET_SIZE)
return -1;
if (buf[0] != 0x47) { |
550f0a9b |
buf++; |
b45a7a18 |
len--;
} else {
handle_packet(ts, buf);
buf += TS_PACKET_SIZE;
len -= TS_PACKET_SIZE; |
bc38e837 |
if (ts->stop_parse == 1)
break; |
b45a7a18 |
}
}
return len1 - len;
}
|
9125806e |
void ff_mpegts_parse_close(MpegTSContext *ts) |
b45a7a18 |
{ |
a717f990 |
mpegts_free(ts); |
b45a7a18 |
av_free(ts);
}
|
66355be3 |
AVInputFormat ff_mpegts_demuxer = { |
dfc2c4d9 |
.name = "mpegts", |
0177b7d2 |
.long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"), |
dfc2c4d9 |
.priv_data_size = sizeof(MpegTSContext),
.read_probe = mpegts_probe,
.read_header = mpegts_read_header,
.read_packet = mpegts_read_packet,
.read_close = mpegts_read_close, |
de9862a9 |
.read_timestamp = mpegts_get_dts, |
20234a4b |
.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT, |
fe9cf0d4 |
}; |
38c48be2 |
|
66355be3 |
AVInputFormat ff_mpegtsraw_demuxer = { |
dfc2c4d9 |
.name = "mpegtsraw", |
0177b7d2 |
.long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"), |
dfc2c4d9 |
.priv_data_size = sizeof(MpegTSContext),
.read_header = mpegts_read_header,
.read_packet = mpegts_raw_read_packet,
.read_close = mpegts_read_close, |
de9862a9 |
.read_timestamp = mpegts_get_dts, |
20234a4b |
.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
.priv_class = &mpegtsraw_class, |
38c48be2 |
}; |