mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
2784 lines
91 KiB
2784 lines
91 KiB
/* |
|
* MPEG2 transport stream (aka DVB) demuxer |
|
* Copyright (c) 2002-2003 Fabrice Bellard |
|
* |
|
* This file is part of FFmpeg. |
|
* |
|
* 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. |
|
* |
|
* 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 FFmpeg; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
#include "libavutil/buffer.h" |
|
#include "libavutil/crc.h" |
|
#include "libavutil/intreadwrite.h" |
|
#include "libavutil/log.h" |
|
#include "libavutil/dict.h" |
|
#include "libavutil/mathematics.h" |
|
#include "libavutil/opt.h" |
|
#include "libavutil/avassert.h" |
|
#include "libavcodec/bytestream.h" |
|
#include "libavcodec/get_bits.h" |
|
#include "libavcodec/opus.h" |
|
#include "avformat.h" |
|
#include "mpegts.h" |
|
#include "internal.h" |
|
#include "avio_internal.h" |
|
#include "seek.h" |
|
#include "mpeg.h" |
|
#include "isom.h" |
|
|
|
/* maximum size in which we look for synchronisation if |
|
* synchronisation is lost */ |
|
#define MAX_RESYNC_SIZE 65536 |
|
|
|
#define MAX_PES_PAYLOAD 200 * 1024 |
|
|
|
#define MAX_MP4_DESCR_COUNT 16 |
|
|
|
#define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \ |
|
do { \ |
|
if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \ |
|
(modulus) = (dividend) % (divisor); \ |
|
(prev_dividend) = (dividend); \ |
|
} while (0) |
|
|
|
enum MpegTSFilterType { |
|
MPEGTS_PES, |
|
MPEGTS_SECTION, |
|
MPEGTS_PCR, |
|
}; |
|
|
|
typedef struct MpegTSFilter MpegTSFilter; |
|
|
|
typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len, |
|
int is_start, int64_t pos); |
|
|
|
typedef struct MpegTSPESFilter { |
|
PESCallback *pes_cb; |
|
void *opaque; |
|
} MpegTSPESFilter; |
|
|
|
typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len); |
|
|
|
typedef void SetServiceCallback (void *opaque, int ret); |
|
|
|
typedef struct MpegTSSectionFilter { |
|
int section_index; |
|
int section_h_size; |
|
uint8_t *section_buf; |
|
unsigned int check_crc : 1; |
|
unsigned int end_of_section_reached : 1; |
|
SectionCallback *section_cb; |
|
void *opaque; |
|
} MpegTSSectionFilter; |
|
|
|
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; |
|
MpegTSSectionFilter section_filter; |
|
} u; |
|
}; |
|
|
|
#define MAX_PIDS_PER_PROGRAM 64 |
|
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 { |
|
const AVClass *class; |
|
/* user data */ |
|
AVFormatContext *stream; |
|
/** raw packet size, including FEC if present */ |
|
int raw_packet_size; |
|
|
|
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; |
|
|
|
/** 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 */ |
|
|
|
/* data needed to handle file based ts */ |
|
/** stop parsing loop */ |
|
int stop_parse; |
|
/** packet containing Audio/Video data */ |
|
AVPacket *pkt; |
|
/** to detect seek */ |
|
int64_t last_pos; |
|
|
|
int skip_changes; |
|
int skip_clear; |
|
|
|
int scan_all_pmts; |
|
|
|
int resync_size; |
|
|
|
/******************************************/ |
|
/* private mpegts data */ |
|
/* scan context */ |
|
/** structure to keep track of Program->pids mapping */ |
|
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 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 }, |
|
{"scan_all_pmts", "Scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_INT, |
|
{ .i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM }, |
|
{"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 }, |
|
}; |
|
|
|
static const AVClass mpegts_class = { |
|
.class_name = "mpegts demuxer", |
|
.item_name = av_default_item_name, |
|
.option = options, |
|
.version = LIBAVUTIL_VERSION_INT, |
|
}; |
|
|
|
static const AVOption raw_options[] = { |
|
MPEGTS_OPTIONS, |
|
{ "compute_pcr", "Compute exact PCR for each transport stream packet.", |
|
offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_INT, |
|
{ .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, |
|
{ "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 }, |
|
{ NULL }, |
|
}; |
|
|
|
static const AVClass mpegtsraw_class = { |
|
.class_name = "mpegtsraw demuxer", |
|
.item_name = av_default_item_name, |
|
.option = raw_options, |
|
.version = LIBAVUTIL_VERSION_INT, |
|
}; |
|
|
|
/* TS stream handling */ |
|
|
|
enum MpegTSState { |
|
MPEGTS_HEADER = 0, |
|
MPEGTS_PESHEADER, |
|
MPEGTS_PESHEADER_FILL, |
|
MPEGTS_PAYLOAD, |
|
MPEGTS_SKIP, |
|
}; |
|
|
|
/* enough for PES header + length */ |
|
#define PES_START_SIZE 6 |
|
#define PES_HEADER_SIZE 9 |
|
#define MAX_PES_HEADER_SIZE (9 + 255) |
|
|
|
typedef struct PESContext { |
|
int pid; |
|
int pcr_pid; /**< if -1 then all packets containing PCR are considered */ |
|
int stream_type; |
|
MpegTSContext *ts; |
|
AVFormatContext *stream; |
|
AVStream *st; |
|
AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */ |
|
enum MpegTSState state; |
|
/* used to get the format */ |
|
int data_index; |
|
int flags; /**< copied to the AVPacket flags */ |
|
int total_size; |
|
int pes_header_size; |
|
int extended_stream_id; |
|
int64_t pts, dts; |
|
int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */ |
|
uint8_t header[MAX_PES_HEADER_SIZE]; |
|
AVBufferRef *buffer; |
|
SLConfigDescr sl; |
|
} 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) { |
|
ts->prg[i].nb_pids = 0; |
|
ts->prg[i].pmt_found = 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) |
|
{ |
|
struct Program *p; |
|
if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) { |
|
ts->nb_prg = 0; |
|
return; |
|
} |
|
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) |
|
{ |
|
struct Program *p = get_program(ts, programid); |
|
int i; |
|
if (!p) |
|
return; |
|
|
|
if (p->nb_pids >= MAX_PIDS_PER_PROGRAM) |
|
return; |
|
|
|
for (i = 0; i < p->nb_pids; i++) |
|
if (p->pids[i] == pid) |
|
return; |
|
|
|
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 |
|
* @param ts : - TS context |
|
* @param pid : - pid |
|
* @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL |
|
* 0 otherwise |
|
*/ |
|
static int discard_pid(MpegTSContext *ts, unsigned int pid) |
|
{ |
|
int i, j, k; |
|
int used = 0, discarded = 0; |
|
struct Program *p; |
|
|
|
/* If none of the programs have .discard=AVDISCARD_ALL then there's |
|
* no way we have to discard this packet */ |
|
for (k = 0; k < ts->stream->nb_programs; k++) |
|
if (ts->stream->programs[k]->discard == AVDISCARD_ALL) |
|
break; |
|
if (k == ts->stream->nb_programs) |
|
return 0; |
|
|
|
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++; |
|
} |
|
} |
|
} |
|
} |
|
|
|
return !used && discarded; |
|
} |
|
|
|
/** |
|
* Assemble PES packets out of TS packets, and then call the "section_cb" |
|
* function when they are complete. |
|
*/ |
|
static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1, |
|
const uint8_t *buf, int buf_size, int is_start) |
|
{ |
|
MpegTSSectionFilter *tss = &tss1->u.section_filter; |
|
int len; |
|
|
|
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) { |
|
len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3; |
|
if (len > 4096) |
|
return; |
|
tss->section_h_size = len; |
|
} |
|
|
|
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) { |
|
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_filter(MpegTSContext *ts, unsigned int pid, |
|
enum MpegTSFilterType type) |
|
{ |
|
MpegTSFilter *filter; |
|
|
|
av_dlog(ts->stream, "Filter: pid=0x%x\n", pid); |
|
|
|
if (pid >= NB_PID_MAX || ts->pids[pid]) |
|
return NULL; |
|
filter = av_mallocz(sizeof(MpegTSFilter)); |
|
if (!filter) |
|
return NULL; |
|
ts->pids[pid] = filter; |
|
|
|
filter->type = type; |
|
filter->pid = pid; |
|
filter->es_id = -1; |
|
filter->last_cc = -1; |
|
filter->last_pcr= -1; |
|
|
|
return filter; |
|
} |
|
|
|
static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, |
|
unsigned int pid, |
|
SectionCallback *section_cb, |
|
void *opaque, |
|
int check_crc) |
|
{ |
|
MpegTSFilter *filter; |
|
MpegTSSectionFilter *sec; |
|
|
|
if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION))) |
|
return NULL; |
|
sec = &filter->u.section_filter; |
|
sec->section_cb = section_cb; |
|
sec->opaque = opaque; |
|
sec->section_buf = av_malloc(MAX_SECTION_SIZE); |
|
sec->check_crc = check_crc; |
|
if (!sec->section_buf) { |
|
av_free(filter); |
|
return NULL; |
|
} |
|
return filter; |
|
} |
|
|
|
static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid, |
|
PESCallback *pes_cb, |
|
void *opaque) |
|
{ |
|
MpegTSFilter *filter; |
|
MpegTSPESFilter *pes; |
|
|
|
if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES))) |
|
return NULL; |
|
|
|
pes = &filter->u.pes_filter; |
|
pes->pes_cb = pes_cb; |
|
pes->opaque = opaque; |
|
return filter; |
|
} |
|
|
|
static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid) |
|
{ |
|
return mpegts_open_filter(ts, pid, MPEGTS_PCR); |
|
} |
|
|
|
static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter) |
|
{ |
|
int pid; |
|
|
|
pid = filter->pid; |
|
if (filter->type == MPEGTS_SECTION) |
|
av_freep(&filter->u.section_filter.section_buf); |
|
else if (filter->type == MPEGTS_PES) { |
|
PESContext *pes = filter->u.pes_filter.opaque; |
|
av_buffer_unref(&pes->buffer); |
|
/* referenced private data will be freed later in |
|
* avformat_close_input */ |
|
if (!((PESContext *)filter->u.pes_filter.opaque)->st) { |
|
av_freep(&filter->u.pes_filter.opaque); |
|
} |
|
} |
|
|
|
av_free(filter); |
|
ts->pids[pid] = NULL; |
|
} |
|
|
|
static int analyze(const uint8_t *buf, int size, int packet_size, int *index) |
|
{ |
|
int stat[TS_MAX_PACKET_SIZE]; |
|
int stat_all = 0; |
|
int i; |
|
int best_score = 0; |
|
|
|
memset(stat, 0, packet_size * sizeof(*stat)); |
|
|
|
for (i = 0; i < size - 3; i++) { |
|
if (buf[i] == 0x47 && !(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; |
|
} |
|
} |
|
} |
|
|
|
return best_score - FFMAX(stat_all - 10*best_score, 0)/10; |
|
} |
|
|
|
/* autodetect fec presence. Must have at least 1024 bytes */ |
|
static int get_packet_size(const uint8_t *buf, int size) |
|
{ |
|
int score, fec_score, dvhs_score; |
|
|
|
if (size < (TS_FEC_PACKET_SIZE * 5 + 1)) |
|
return AVERROR_INVALIDDATA; |
|
|
|
score = analyze(buf, size, TS_PACKET_SIZE, NULL); |
|
dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, NULL); |
|
fec_score = analyze(buf, size, TS_FEC_PACKET_SIZE, NULL); |
|
av_dlog(NULL, "score: %d, dvhs_score: %d, fec_score: %d \n", |
|
score, dvhs_score, fec_score); |
|
|
|
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; |
|
else |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
typedef struct SectionHeader { |
|
uint8_t tid; |
|
uint16_t id; |
|
uint8_t version; |
|
uint8_t sec_num; |
|
uint8_t last_sec_num; |
|
} SectionHeader; |
|
|
|
static inline int get8(const uint8_t **pp, const uint8_t *p_end) |
|
{ |
|
const uint8_t *p; |
|
int c; |
|
|
|
p = *pp; |
|
if (p >= p_end) |
|
return AVERROR_INVALIDDATA; |
|
c = *p++; |
|
*pp = p; |
|
return c; |
|
} |
|
|
|
static inline int get16(const uint8_t **pp, const uint8_t *p_end) |
|
{ |
|
const uint8_t *p; |
|
int c; |
|
|
|
p = *pp; |
|
if ((p + 1) >= p_end) |
|
return AVERROR_INVALIDDATA; |
|
c = AV_RB16(p); |
|
p += 2; |
|
*pp = p; |
|
return c; |
|
} |
|
|
|
/* read and allocate a DVB string preceded by its length */ |
|
static char *getstr8(const uint8_t **pp, const uint8_t *p_end) |
|
{ |
|
int len; |
|
const uint8_t *p; |
|
char *str; |
|
|
|
p = *pp; |
|
len = get8(&p, p_end); |
|
if (len < 0) |
|
return NULL; |
|
if ((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; |
|
} |
|
|
|
static int parse_section_header(SectionHeader *h, |
|
const uint8_t **pp, const uint8_t *p_end) |
|
{ |
|
int val; |
|
|
|
val = get8(pp, p_end); |
|
if (val < 0) |
|
return val; |
|
h->tid = val; |
|
*pp += 2; |
|
val = get16(pp, p_end); |
|
if (val < 0) |
|
return val; |
|
h->id = val; |
|
val = get8(pp, p_end); |
|
if (val < 0) |
|
return val; |
|
h->version = (val >> 1) & 0x1f; |
|
val = get8(pp, p_end); |
|
if (val < 0) |
|
return val; |
|
h->sec_num = val; |
|
val = get8(pp, p_end); |
|
if (val < 0) |
|
return val; |
|
h->last_sec_num = val; |
|
return 0; |
|
} |
|
|
|
typedef struct { |
|
uint32_t stream_type; |
|
enum AVMediaType codec_type; |
|
enum AVCodecID codec_id; |
|
} StreamType; |
|
|
|
static const StreamType ISO_types[] = { |
|
{ 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO }, |
|
{ 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO }, |
|
{ 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 }, |
|
{ 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 }, |
|
{ 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC }, |
|
{ 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 }, |
|
/* Makito encoder sets stream type 0x11 for AAC, |
|
* so auto-detect LOAS/LATM instead of hardcoding it. */ |
|
#if !CONFIG_LOAS_DEMUXER |
|
{ 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */ |
|
#endif |
|
{ 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 }, |
|
{ 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC }, |
|
{ 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS }, |
|
{ 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC }, |
|
{ 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 }, |
|
{ 0 }, |
|
}; |
|
|
|
static const StreamType HDMV_types[] = { |
|
{ 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY }, |
|
{ 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, |
|
{ 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, |
|
{ 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD }, |
|
{ 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, |
|
{ 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */ |
|
{ 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/ |
|
{ 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */ |
|
{ 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */ |
|
{ 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE }, |
|
{ 0 }, |
|
}; |
|
|
|
/* ATSC ? */ |
|
static const StreamType MISC_types[] = { |
|
{ 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, |
|
{ 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, |
|
{ 0 }, |
|
}; |
|
|
|
static const StreamType REGD_types[] = { |
|
{ MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC }, |
|
{ MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, |
|
{ MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M }, |
|
{ MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, |
|
{ MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, |
|
{ MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, |
|
{ MKTAG('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 }, |
|
{ MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS }, |
|
{ 0 }, |
|
}; |
|
|
|
static const StreamType METADATA_types[] = { |
|
{ MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV }, |
|
{ MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 }, |
|
{ 0 }, |
|
}; |
|
|
|
/* descriptor present */ |
|
static const StreamType DESC_types[] = { |
|
{ 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */ |
|
{ 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */ |
|
{ 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, |
|
{ 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT }, |
|
{ 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */ |
|
{ 0 }, |
|
}; |
|
|
|
static void mpegts_find_stream_type(AVStream *st, |
|
uint32_t stream_type, |
|
const StreamType *types) |
|
{ |
|
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; |
|
} |
|
} |
|
|
|
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; |
|
st->codec->codec_id = AV_CODEC_ID_NONE; |
|
st->need_parsing = AVSTREAM_PARSE_FULL; |
|
pes->st = st; |
|
pes->stream_type = stream_type; |
|
|
|
av_log(pes->stream, AV_LOG_DEBUG, |
|
"stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n", |
|
st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc); |
|
|
|
st->codec->codec_tag = pes->stream_type; |
|
|
|
mpegts_find_stream_type(st, pes->stream_type, ISO_types); |
|
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) { |
|
// HDMV TrueHD streams also contain an AC3 coded version of the |
|
// audio track - add a second stream for this |
|
AVStream *sub_st; |
|
// priv_data cannot be shared between streams |
|
PESContext *sub_pes = av_malloc(sizeof(*sub_pes)); |
|
if (!sub_pes) |
|
return AVERROR(ENOMEM); |
|
memcpy(sub_pes, pes, sizeof(*sub_pes)); |
|
|
|
sub_st = avformat_new_stream(pes->stream, NULL); |
|
if (!sub_st) { |
|
av_free(sub_pes); |
|
return AVERROR(ENOMEM); |
|
} |
|
|
|
sub_st->id = pes->pid; |
|
avpriv_set_pts_info(sub_st, 33, 1, 90000); |
|
sub_st->priv_data = sub_pes; |
|
sub_st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
|
sub_st->codec->codec_id = AV_CODEC_ID_AC3; |
|
sub_st->need_parsing = AVSTREAM_PARSE_FULL; |
|
sub_pes->sub_st = pes->sub_st = sub_st; |
|
} |
|
} |
|
if (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); |
|
|
|
pkt->buf = pes->buffer; |
|
pkt->data = pes->buffer->data; |
|
pkt->size = pes->data_index; |
|
|
|
if (pes->total_size != MAX_PES_PAYLOAD && |
|
pes->pes_header_size + pes->data_index != pes->total_size + |
|
PES_START_SIZE) { |
|
av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n"); |
|
pes->flags |= AV_PKT_FLAG_CORRUPT; |
|
} |
|
memset(pkt->data + pkt->size, 0, 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; |
|
pkt->flags = pes->flags; |
|
|
|
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, |
|
const uint8_t *buf, int buf_size) |
|
{ |
|
GetBitContext gb; |
|
int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0; |
|
int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0; |
|
int dts_flag = -1, cts_flag = -1; |
|
int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE; |
|
uint8_t buf_padded[128 + FF_INPUT_BUFFER_PADDING_SIZE]; |
|
int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - FF_INPUT_BUFFER_PADDING_SIZE); |
|
|
|
memcpy(buf_padded, buf, buf_padded_size); |
|
|
|
init_get_bits(&gb, buf_padded, buf_padded_size * 8); |
|
|
|
if (sl->use_au_start) |
|
au_start_flag = get_bits1(&gb); |
|
if (sl->use_au_end) |
|
au_end_flag = get_bits1(&gb); |
|
if (!sl->use_au_start && !sl->use_au_end) |
|
au_start_flag = au_end_flag = 1; |
|
if (sl->ocr_len > 0) |
|
ocr_flag = get_bits1(&gb); |
|
if (sl->use_idle) |
|
idle_flag = get_bits1(&gb); |
|
if (sl->use_padding) |
|
padding_flag = get_bits1(&gb); |
|
if (padding_flag) |
|
padding_bits = get_bits(&gb, 3); |
|
|
|
if (!idle_flag && (!padding_flag || padding_bits != 0)) { |
|
if (sl->packet_seq_num_len) |
|
skip_bits_long(&gb, sl->packet_seq_num_len); |
|
if (sl->degr_prior_len) |
|
if (get_bits1(&gb)) |
|
skip_bits(&gb, sl->degr_prior_len); |
|
if (ocr_flag) |
|
skip_bits_long(&gb, sl->ocr_len); |
|
if (au_start_flag) { |
|
if (sl->use_rand_acc_pt) |
|
get_bits1(&gb); |
|
if (sl->au_seq_num_len > 0) |
|
skip_bits_long(&gb, sl->au_seq_num_len); |
|
if (sl->use_timestamps) { |
|
dts_flag = get_bits1(&gb); |
|
cts_flag = get_bits1(&gb); |
|
} |
|
} |
|
if (sl->inst_bitrate_len) |
|
inst_bitrate_flag = get_bits1(&gb); |
|
if (dts_flag == 1) |
|
dts = get_ts64(&gb, sl->timestamp_len); |
|
if (cts_flag == 1) |
|
cts = get_ts64(&gb, sl->timestamp_len); |
|
if (sl->au_len > 0) |
|
skip_bits_long(&gb, sl->au_len); |
|
if (inst_bitrate_flag) |
|
skip_bits_long(&gb, sl->inst_bitrate_len); |
|
} |
|
|
|
if (dts != AV_NOPTS_VALUE) |
|
pes->dts = dts; |
|
if (cts != AV_NOPTS_VALUE) |
|
pes->pts = cts; |
|
|
|
if (sl->timestamp_len && sl->timestamp_res) |
|
avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res); |
|
|
|
return (get_bits_count(&gb) + 7) >> 3; |
|
} |
|
|
|
/* return non zero if a packet could be constructed */ |
|
static int mpegts_push_data(MpegTSFilter *filter, |
|
const uint8_t *buf, int buf_size, int is_start, |
|
int64_t pos) |
|
{ |
|
PESContext *pes = filter->u.pes_filter.opaque; |
|
MpegTSContext *ts = pes->ts; |
|
const uint8_t *p; |
|
int 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; |
|
} else { |
|
reset_pes_packet_state(pes); |
|
} |
|
pes->state = MPEGTS_HEADER; |
|
pes->ts_packet_pos = pos; |
|
} |
|
p = buf; |
|
while (buf_size > 0) { |
|
switch (pes->state) { |
|
case MPEGTS_HEADER: |
|
len = PES_START_SIZE - pes->data_index; |
|
if (len > buf_size) |
|
len = buf_size; |
|
memcpy(pes->header + pes->data_index, p, len); |
|
pes->data_index += len; |
|
p += len; |
|
buf_size -= len; |
|
if (pes->data_index == PES_START_SIZE) { |
|
/* we got all the PES or section header. We can now |
|
* decide */ |
|
if (pes->header[0] == 0x00 && pes->header[1] == 0x00 && |
|
pes->header[2] == 0x01) { |
|
/* it must be an mpeg2 PES stream */ |
|
code = pes->header[3] | 0x100; |
|
av_dlog(pes->stream, "pid=%x pes_code=%#x\n", pes->pid, |
|
code); |
|
|
|
if ((pes->st && pes->st->discard == AVDISCARD_ALL && |
|
(!pes->sub_st || |
|
pes->sub_st->discard == AVDISCARD_ALL)) || |
|
code == 0x1be) /* padding_stream */ |
|
goto skip; |
|
|
|
/* stream not present in PMT */ |
|
if (!pes->st) { |
|
if (ts->skip_changes) |
|
goto skip; |
|
|
|
pes->st = avformat_new_stream(ts->stream, NULL); |
|
if (!pes->st) |
|
return AVERROR(ENOMEM); |
|
pes->st->id = pes->pid; |
|
mpegts_set_stream_info(pes->st, pes, 0, 0); |
|
} |
|
|
|
pes->total_size = AV_RB16(pes->header + 4); |
|
/* NOTE: a zero total size means the PES size is |
|
* unbounded */ |
|
if (!pes->total_size) |
|
pes->total_size = MAX_PES_PAYLOAD; |
|
|
|
/* allocate pes buffer */ |
|
pes->buffer = av_buffer_alloc(pes->total_size + |
|
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; |
|
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->request_probe = 1; |
|
} |
|
} 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 AVERROR_INVALIDDATA; |
|
if (len > buf_size) |
|
len = buf_size; |
|
memcpy(pes->header + pes->data_index, p, len); |
|
pes->data_index += len; |
|
p += len; |
|
buf_size -= len; |
|
if (pes->data_index == PES_HEADER_SIZE) { |
|
pes->pes_header_size = pes->header[8] + 9; |
|
pes->state = MPEGTS_PESHEADER_FILL; |
|
} |
|
break; |
|
case MPEGTS_PESHEADER_FILL: |
|
len = pes->pes_header_size - pes->data_index; |
|
if (len < 0) |
|
return AVERROR_INVALIDDATA; |
|
if (len > buf_size) |
|
len = buf_size; |
|
memcpy(pes->header + pes->data_index, p, len); |
|
pes->data_index += len; |
|
p += len; |
|
buf_size -= len; |
|
if (pes->data_index == pes->pes_header_size) { |
|
const uint8_t *r; |
|
unsigned int flags, pes_ext, skip; |
|
|
|
flags = pes->header[7]; |
|
r = pes->header + 9; |
|
pes->pts = AV_NOPTS_VALUE; |
|
pes->dts = AV_NOPTS_VALUE; |
|
if ((flags & 0xc0) == 0x80) { |
|
pes->dts = pes->pts = ff_parse_pes_pts(r); |
|
r += 5; |
|
} else if ((flags & 0xc0) == 0xc0) { |
|
pes->pts = ff_parse_pes_pts(r); |
|
r += 5; |
|
pes->dts = ff_parse_pes_pts(r); |
|
r += 5; |
|
} |
|
pes->extended_stream_id = -1; |
|
if (flags & 0x01) { /* PES extension */ |
|
pes_ext = *r++; |
|
/* Skip PES private data, program packet sequence counter and P-STD buffer */ |
|
skip = (pes_ext >> 4) & 0xb; |
|
skip += skip & 0x9; |
|
r += skip; |
|
if ((pes_ext & 0x41) == 0x01 && |
|
(r + 2) <= (pes->header + pes->pes_header_size)) { |
|
/* PES extension 2 */ |
|
if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0) |
|
pes->extended_stream_id = r[1]; |
|
} |
|
} |
|
|
|
/* we got the full header. We parse it and get the payload */ |
|
pes->state = MPEGTS_PAYLOAD; |
|
pes->data_index = 0; |
|
if (pes->stream_type == 0x12 && buf_size > 0) { |
|
int sl_header_bytes = read_sl_header(pes, &pes->sl, p, |
|
buf_size); |
|
pes->pes_header_size += sl_header_bytes; |
|
p += sl_header_bytes; |
|
buf_size -= sl_header_bytes; |
|
} |
|
if (pes->stream_type == 0x15 && buf_size >= 5) { |
|
/* skip metadata access unit header */ |
|
pes->pes_header_size += 5; |
|
p += 5; |
|
buf_size -= 5; |
|
} |
|
if (pes->ts->fix_teletext_pts && pes->st->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 (pes->buffer) { |
|
if (pes->data_index > 0 && |
|
pes->data_index + buf_size > pes->total_size) { |
|
new_pes_packet(pes, ts->pkt); |
|
pes->total_size = MAX_PES_PAYLOAD; |
|
pes->buffer = av_buffer_alloc(pes->total_size + |
|
FF_INPUT_BUFFER_PADDING_SIZE); |
|
if (!pes->buffer) |
|
return AVERROR(ENOMEM); |
|
ts->stop_parse = 1; |
|
} else if (pes->data_index == 0 && |
|
buf_size > pes->total_size) { |
|
// pes packet size is < ts size packet and pes data is padded with 0xff |
|
// not sure if this is legal in ts but see issue #2392 |
|
buf_size = pes->total_size; |
|
} |
|
memcpy(pes->buffer->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; |
|
break; |
|
case MPEGTS_SKIP: |
|
buf_size = 0; |
|
break; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid) |
|
{ |
|
MpegTSFilter *tss; |
|
PESContext *pes; |
|
|
|
/* if no pid found, then add a pid context */ |
|
pes = av_mallocz(sizeof(PESContext)); |
|
if (!pes) |
|
return 0; |
|
pes->ts = ts; |
|
pes->stream = ts->stream; |
|
pes->pid = pid; |
|
pes->pcr_pid = pcr_pid; |
|
pes->state = MPEGTS_SKIP; |
|
pes->pts = AV_NOPTS_VALUE; |
|
pes->dts = AV_NOPTS_VALUE; |
|
tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes); |
|
if (!tss) { |
|
av_free(pes); |
|
return 0; |
|
} |
|
return pes; |
|
} |
|
|
|
#define MAX_LEVEL 4 |
|
typedef struct { |
|
AVFormatContext *s; |
|
AVIOContext pb; |
|
Mp4Descr *descr; |
|
Mp4Descr *active_descr; |
|
int descr_count; |
|
int max_descr_count; |
|
int level; |
|
int predefined_SLConfigDescriptor_seen; |
|
} MP4DescrParseContext; |
|
|
|
static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s, |
|
const uint8_t *buf, unsigned size, |
|
Mp4Descr *descr, int max_descr_count) |
|
{ |
|
int ret; |
|
if (size > (1 << 30)) |
|
return AVERROR_INVALIDDATA; |
|
|
|
if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0, |
|
NULL, NULL, NULL, NULL)) < 0) |
|
return ret; |
|
|
|
d->s = s; |
|
d->level = 0; |
|
d->descr_count = 0; |
|
d->descr = descr; |
|
d->active_descr = NULL; |
|
d->max_descr_count = max_descr_count; |
|
|
|
return 0; |
|
} |
|
|
|
static void update_offsets(AVIOContext *pb, int64_t *off, int *len) |
|
{ |
|
int64_t new_off = avio_tell(pb); |
|
(*len) -= new_off - *off; |
|
*off = new_off; |
|
} |
|
|
|
static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len, |
|
int target_tag); |
|
|
|
static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len) |
|
{ |
|
while (len > 0) { |
|
int ret = parse_mp4_descr(d, off, len, 0); |
|
if (ret < 0) |
|
return ret; |
|
update_offsets(&d->pb, &off, &len); |
|
} |
|
return 0; |
|
} |
|
|
|
static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len) |
|
{ |
|
avio_rb16(&d->pb); // ID |
|
avio_r8(&d->pb); |
|
avio_r8(&d->pb); |
|
avio_r8(&d->pb); |
|
avio_r8(&d->pb); |
|
avio_r8(&d->pb); |
|
update_offsets(&d->pb, &off, &len); |
|
return parse_mp4_descr_arr(d, off, len); |
|
} |
|
|
|
static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len) |
|
{ |
|
int id_flags; |
|
if (len < 2) |
|
return 0; |
|
id_flags = avio_rb16(&d->pb); |
|
if (!(id_flags & 0x0020)) { // URL_Flag |
|
update_offsets(&d->pb, &off, &len); |
|
return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[] |
|
} else { |
|
return 0; |
|
} |
|
} |
|
|
|
static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len) |
|
{ |
|
int es_id = 0; |
|
if (d->descr_count >= d->max_descr_count) |
|
return AVERROR_INVALIDDATA; |
|
ff_mp4_parse_es_descr(&d->pb, &es_id); |
|
d->active_descr = d->descr + (d->descr_count++); |
|
|
|
d->active_descr->es_id = es_id; |
|
update_offsets(&d->pb, &off, &len); |
|
parse_mp4_descr(d, off, len, MP4DecConfigDescrTag); |
|
update_offsets(&d->pb, &off, &len); |
|
if (len > 0) |
|
parse_mp4_descr(d, off, len, MP4SLDescrTag); |
|
d->active_descr = NULL; |
|
return 0; |
|
} |
|
|
|
static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off, |
|
int len) |
|
{ |
|
Mp4Descr *descr = d->active_descr; |
|
if (!descr) |
|
return AVERROR_INVALIDDATA; |
|
d->active_descr->dec_config_descr = av_malloc(len); |
|
if (!descr->dec_config_descr) |
|
return AVERROR(ENOMEM); |
|
descr->dec_config_descr_len = len; |
|
avio_read(&d->pb, descr->dec_config_descr, len); |
|
return 0; |
|
} |
|
|
|
static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len) |
|
{ |
|
Mp4Descr *descr = d->active_descr; |
|
int predefined; |
|
if (!descr) |
|
return AVERROR_INVALIDDATA; |
|
|
|
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); |
|
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); |
|
lengths = avio_rb16(&d->pb); |
|
descr->sl.degr_prior_len = lengths >> 12; |
|
descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f; |
|
descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f; |
|
} else if (!d->predefined_SLConfigDescriptor_seen){ |
|
avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor"); |
|
d->predefined_SLConfigDescriptor_seen = 1; |
|
} |
|
return 0; |
|
} |
|
|
|
static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len, |
|
int target_tag) |
|
{ |
|
int tag; |
|
int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag); |
|
update_offsets(&d->pb, &off, &len); |
|
if (len < 0 || len1 > len || len1 <= 0) { |
|
av_log(d->s, AV_LOG_ERROR, |
|
"Tag %x length violation new length %d bytes remaining %d\n", |
|
tag, len1, len); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
if (d->level++ >= MAX_LEVEL) { |
|
av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n"); |
|
goto done; |
|
} |
|
|
|
if (target_tag && tag != target_tag) { |
|
av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag, |
|
target_tag); |
|
goto done; |
|
} |
|
|
|
switch (tag) { |
|
case MP4IODescrTag: |
|
parse_MP4IODescrTag(d, off, len1); |
|
break; |
|
case MP4ODescrTag: |
|
parse_MP4ODescrTag(d, off, len1); |
|
break; |
|
case MP4ESDescrTag: |
|
parse_MP4ESDescrTag(d, off, len1); |
|
break; |
|
case MP4DecConfigDescrTag: |
|
parse_MP4DecConfigDescrTag(d, off, len1); |
|
break; |
|
case MP4SLDescrTag: |
|
parse_MP4SLDescrTag(d, off, len1); |
|
break; |
|
} |
|
|
|
|
|
done: |
|
d->level--; |
|
avio_seek(&d->pb, off + len1, SEEK_SET); |
|
return 0; |
|
} |
|
|
|
static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size, |
|
Mp4Descr *descr, int *descr_count, int max_descr_count) |
|
{ |
|
MP4DescrParseContext d; |
|
int ret; |
|
|
|
ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag); |
|
|
|
*descr_count = d.descr_count; |
|
return ret; |
|
} |
|
|
|
static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size, |
|
Mp4Descr *descr, int *descr_count, int max_descr_count) |
|
{ |
|
MP4DescrParseContext d; |
|
int ret; |
|
|
|
ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size); |
|
|
|
*descr_count = d.descr_count; |
|
return ret; |
|
} |
|
|
|
static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, |
|
int section_len) |
|
{ |
|
MpegTSContext *ts = filter->u.section_filter.opaque; |
|
SectionHeader h; |
|
const uint8_t *p, *p_end; |
|
AVIOContext pb; |
|
int mp4_descr_count = 0; |
|
Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } }; |
|
int i, pid; |
|
AVFormatContext *s = ts->stream; |
|
|
|
p_end = section + section_len - 4; |
|
p = section; |
|
if (parse_section_header(&h, &p, p_end) < 0) |
|
return; |
|
if (h.tid != M4OD_TID) |
|
return; |
|
|
|
mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count, |
|
MAX_MP4_DESCR_COUNT); |
|
|
|
for (pid = 0; pid < NB_PID_MAX; pid++) { |
|
if (!ts->pids[pid]) |
|
continue; |
|
for (i = 0; i < mp4_descr_count; i++) { |
|
PESContext *pes; |
|
AVStream *st; |
|
if (ts->pids[pid]->es_id != mp4_descr[i].es_id) |
|
continue; |
|
if (ts->pids[pid]->type != MPEGTS_PES) { |
|
av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid); |
|
continue; |
|
} |
|
pes = ts->pids[pid]->u.pes_filter.opaque; |
|
st = pes->st; |
|
if (!st) |
|
continue; |
|
|
|
pes->sl = mp4_descr[i].sl; |
|
|
|
ffio_init_context(&pb, mp4_descr[i].dec_config_descr, |
|
mp4_descr[i].dec_config_descr_len, 0, |
|
NULL, NULL, NULL, NULL); |
|
ff_mp4_read_dec_config_descr(s, st, &pb); |
|
if (st->codec->codec_id == AV_CODEC_ID_AAC && |
|
st->codec->extradata_size > 0) |
|
st->need_parsing = 0; |
|
if (st->codec->codec_id == AV_CODEC_ID_H264 && |
|
st->codec->extradata_size > 0) |
|
st->need_parsing = 0; |
|
|
|
if (st->codec->codec_id <= AV_CODEC_ID_NONE) { |
|
// do nothing |
|
} else if (st->codec->codec_id < AV_CODEC_ID_FIRST_AUDIO) |
|
st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
|
else if (st->codec->codec_id < AV_CODEC_ID_FIRST_SUBTITLE) |
|
st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
|
else if (st->codec->codec_id < AV_CODEC_ID_FIRST_UNKNOWN) |
|
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; |
|
} |
|
} |
|
for (i = 0; i < mp4_descr_count; i++) |
|
av_free(mp4_descr[i].dec_config_descr); |
|
} |
|
|
|
static const uint8_t opus_coupled_stream_cnt[9] = { |
|
1, 0, 1, 1, 2, 2, 2, 3, 3 |
|
}; |
|
|
|
static const uint8_t opus_channel_map[8][8] = { |
|
{ 0 }, |
|
{ 0,1 }, |
|
{ 0,2,1 }, |
|
{ 0,1,2,3 }, |
|
{ 0,4,1,2,3 }, |
|
{ 0,4,1,2,3,5 }, |
|
{ 0,4,1,2,3,5,6 }, |
|
{ 0,6,1,2,3,4,5,7 }, |
|
}; |
|
|
|
int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type, |
|
const uint8_t **pp, const uint8_t *desc_list_end, |
|
Mp4Descr *mp4_descr, int mp4_descr_count, int pid, |
|
MpegTSContext *ts) |
|
{ |
|
const uint8_t *desc_end; |
|
int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code; |
|
char language[252]; |
|
int i; |
|
|
|
desc_tag = get8(pp, desc_list_end); |
|
if (desc_tag < 0) |
|
return AVERROR_INVALIDDATA; |
|
desc_len = get8(pp, desc_list_end); |
|
if (desc_len < 0) |
|
return AVERROR_INVALIDDATA; |
|
desc_end = *pp + desc_len; |
|
if (desc_end > desc_list_end) |
|
return AVERROR_INVALIDDATA; |
|
|
|
av_dlog(fc, "tag: 0x%02x len=%d\n", desc_tag, desc_len); |
|
|
|
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); |
|
|
|
switch (desc_tag) { |
|
case 0x1E: /* SL descriptor */ |
|
desc_es_id = get16(pp, desc_end); |
|
if (ts && ts->pids[pid]) |
|
ts->pids[pid]->es_id = desc_es_id; |
|
for (i = 0; i < mp4_descr_count; i++) |
|
if (mp4_descr[i].dec_config_descr_len && |
|
mp4_descr[i].es_id == desc_es_id) { |
|
AVIOContext pb; |
|
ffio_init_context(&pb, mp4_descr[i].dec_config_descr, |
|
mp4_descr[i].dec_config_descr_len, 0, |
|
NULL, NULL, NULL, NULL); |
|
ff_mp4_read_dec_config_descr(fc, st, &pb); |
|
if (st->codec->codec_id == AV_CODEC_ID_AAC && |
|
st->codec->extradata_size > 0) |
|
st->need_parsing = 0; |
|
if (st->codec->codec_id == AV_CODEC_ID_MPEG4SYSTEMS) |
|
mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1); |
|
} |
|
break; |
|
case 0x1F: /* FMC descriptor */ |
|
get16(pp, desc_end); |
|
if (mp4_descr_count > 0 && |
|
(st->codec->codec_id == AV_CODEC_ID_AAC_LATM || st->request_probe > 0) && |
|
mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) { |
|
AVIOContext pb; |
|
ffio_init_context(&pb, mp4_descr->dec_config_descr, |
|
mp4_descr->dec_config_descr_len, 0, |
|
NULL, NULL, NULL, NULL); |
|
ff_mp4_read_dec_config_descr(fc, st, &pb); |
|
if (st->codec->codec_id == AV_CODEC_ID_AAC && |
|
st->codec->extradata_size > 0) { |
|
st->request_probe = st->need_parsing = 0; |
|
st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
|
} |
|
} |
|
break; |
|
case 0x56: /* DVB teletext descriptor */ |
|
{ |
|
uint8_t *extradata = NULL; |
|
int language_count = desc_len / 5; |
|
|
|
if (desc_len > 0 && desc_len % 5 != 0) |
|
return AVERROR_INVALIDDATA; |
|
|
|
if (language_count > 0) { |
|
/* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */ |
|
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 */ |
|
{ |
|
/* 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); |
|
} |
|
} |
|
break; |
|
case 0x0a: /* ISO 639 language descriptor */ |
|
for (i = 0; i + 4 <= desc_len; i += 4) { |
|
language[i + 0] = get8(pp, desc_end); |
|
language[i + 1] = get8(pp, desc_end); |
|
language[i + 2] = get8(pp, desc_end); |
|
language[i + 3] = ','; |
|
switch (get8(pp, desc_end)) { |
|
case 0x01: |
|
st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS; |
|
break; |
|
case 0x02: |
|
st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED; |
|
break; |
|
case 0x03: |
|
st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; |
|
break; |
|
} |
|
} |
|
if (i && language[0]) { |
|
language[i - 1] = 0; |
|
av_dict_set(&st->metadata, "language", language, 0); |
|
} |
|
break; |
|
case 0x05: /* registration descriptor */ |
|
st->codec->codec_tag = bytestream_get_le32(pp); |
|
av_dlog(fc, "reg_desc=%.4s\n", (char *)&st->codec->codec_tag); |
|
if (st->codec->codec_id == AV_CODEC_ID_NONE) |
|
mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types); |
|
break; |
|
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; |
|
case 0x7f: /* DVB extension descriptor */ |
|
ext_desc_tag = get8(pp, desc_end); |
|
if (ext_desc_tag < 0) |
|
return AVERROR_INVALIDDATA; |
|
if (st->codec->codec_id == AV_CODEC_ID_OPUS && |
|
ext_desc_tag == 0x80) { /* User defined (provisional Opus) */ |
|
if (!st->codec->extradata) { |
|
st->codec->extradata = av_mallocz(sizeof(opus_default_extradata) + |
|
FF_INPUT_BUFFER_PADDING_SIZE); |
|
if (!st->codec->extradata) |
|
return AVERROR(ENOMEM); |
|
|
|
st->codec->extradata_size = sizeof(opus_default_extradata); |
|
memcpy(st->codec->extradata, opus_default_extradata, sizeof(opus_default_extradata)); |
|
|
|
channel_config_code = get8(pp, desc_end); |
|
if (channel_config_code < 0) |
|
return AVERROR_INVALIDDATA; |
|
if (channel_config_code <= 0x8) { |
|
st->codec->extradata[9] = channels = channel_config_code ? channel_config_code : 2; |
|
st->codec->extradata[18] = channels > 2; |
|
st->codec->extradata[19] = channels - opus_coupled_stream_cnt[channel_config_code]; |
|
if (channel_config_code == 0) { /* Dual Mono */ |
|
st->codec->extradata[18] = 255; /* Mapping */ |
|
} |
|
st->codec->extradata[20] = opus_coupled_stream_cnt[channel_config_code]; |
|
memcpy(&st->codec->extradata[21], opus_channel_map[channels - 1], channels); |
|
} else { |
|
avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8"); |
|
} |
|
st->need_parsing = AVSTREAM_PARSE_FULL; |
|
} |
|
} |
|
break; |
|
default: |
|
break; |
|
} |
|
*pp = desc_end; |
|
return 0; |
|
} |
|
|
|
static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len) |
|
{ |
|
MpegTSContext *ts = filter->u.section_filter.opaque; |
|
SectionHeader h1, *h = &h1; |
|
PESContext *pes; |
|
AVStream *st; |
|
const uint8_t *p, *p_end, *desc_list_end; |
|
int program_info_length, pcr_pid, pid, stream_type; |
|
int desc_list_len; |
|
uint32_t prog_reg_desc = 0; /* registration descriptor */ |
|
|
|
int mp4_descr_count = 0; |
|
Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } }; |
|
int i; |
|
|
|
av_dlog(ts->stream, "PMT: len %i\n", section_len); |
|
hex_dump_debug(ts->stream, section, section_len); |
|
|
|
p_end = section + section_len - 4; |
|
p = section; |
|
if (parse_section_header(h, &p, p_end) < 0) |
|
return; |
|
|
|
av_dlog(ts->stream, "sid=0x%x sec_num=%d/%d version=%d\n", |
|
h->id, h->sec_num, h->last_sec_num, h->version); |
|
|
|
if (h->tid != PMT_TID) |
|
return; |
|
if (!ts->scan_all_pmts && ts->skip_changes) |
|
return; |
|
|
|
if (!ts->skip_clear) |
|
clear_program(ts, h->id); |
|
|
|
pcr_pid = get16(&p, p_end); |
|
if (pcr_pid < 0) |
|
return; |
|
pcr_pid &= 0x1fff; |
|
add_pid_to_pmt(ts, h->id, pcr_pid); |
|
set_pcr_pid(ts->stream, h->id, pcr_pid); |
|
|
|
av_dlog(ts->stream, "pcr_pid=0x%x\n", pcr_pid); |
|
|
|
program_info_length = get16(&p, p_end); |
|
if (program_info_length < 0) |
|
return; |
|
program_info_length &= 0xfff; |
|
while (program_info_length >= 2) { |
|
uint8_t tag, len; |
|
tag = get8(&p, p_end); |
|
len = get8(&p, p_end); |
|
|
|
av_dlog(ts->stream, "program tag: 0x%02x len=%d\n", tag, len); |
|
|
|
if (len > program_info_length - 2) |
|
// something else is broken, exit the program_descriptors_loop |
|
break; |
|
program_info_length -= len + 2; |
|
if (tag == 0x1d) { // IOD descriptor |
|
get8(&p, p_end); // scope |
|
get8(&p, p_end); // label |
|
len -= 2; |
|
mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count, |
|
&mp4_descr_count, MAX_MP4_DESCR_COUNT); |
|
} else if (tag == 0x05 && len >= 4) { // registration descriptor |
|
prog_reg_desc = bytestream_get_le32(&p); |
|
len -= 4; |
|
} |
|
p += len; |
|
} |
|
p += program_info_length; |
|
if (p >= p_end) |
|
goto out; |
|
|
|
// stop parsing after pmt, we found header |
|
if (!ts->stream->nb_streams) |
|
ts->stop_parse = 2; |
|
|
|
set_pmt_found(ts, h->id); |
|
|
|
|
|
for (;;) { |
|
st = 0; |
|
pes = NULL; |
|
stream_type = get8(&p, p_end); |
|
if (stream_type < 0) |
|
break; |
|
pid = get16(&p, p_end); |
|
if (pid < 0) |
|
goto out; |
|
pid &= 0x1fff; |
|
if (pid == ts->current_pid) |
|
goto out; |
|
|
|
/* 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; |
|
} else if (stream_type != 0x13) { |
|
if (ts->pids[pid]) |
|
mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably |
|
pes = add_pes_stream(ts, pid, pcr_pid); |
|
if (pes) { |
|
st = avformat_new_stream(pes->stream, NULL); |
|
if (!st) |
|
goto out; |
|
st->id = pes->pid; |
|
} |
|
} else { |
|
int idx = ff_find_stream_index(ts->stream, pid); |
|
if (idx >= 0) { |
|
st = ts->stream->streams[idx]; |
|
} else { |
|
st = avformat_new_stream(ts->stream, NULL); |
|
if (!st) |
|
goto out; |
|
st->id = pid; |
|
st->codec->codec_type = AVMEDIA_TYPE_DATA; |
|
} |
|
} |
|
|
|
if (!st) |
|
goto out; |
|
|
|
if (pes && !pes->stream_type) |
|
mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc); |
|
|
|
add_pid_to_pmt(ts, h->id, pid); |
|
|
|
ff_program_add_stream_index(ts->stream, h->id, st->index); |
|
|
|
desc_list_len = get16(&p, p_end); |
|
if (desc_list_len < 0) |
|
goto out; |
|
desc_list_len &= 0xfff; |
|
desc_list_end = p + desc_list_len; |
|
if (desc_list_end > p_end) |
|
goto out; |
|
for (;;) { |
|
if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p, |
|
desc_list_end, mp4_descr, |
|
mp4_descr_count, pid, ts) < 0) |
|
break; |
|
|
|
if (pes && prog_reg_desc == AV_RL32("HDMV") && |
|
stream_type == 0x83 && pes->sub_st) { |
|
ff_program_add_stream_index(ts->stream, h->id, |
|
pes->sub_st->index); |
|
pes->sub_st->codec->codec_tag = st->codec->codec_tag; |
|
} |
|
} |
|
p = desc_list_end; |
|
} |
|
|
|
if (!ts->pids[pcr_pid]) |
|
mpegts_open_pcr_filter(ts, pcr_pid); |
|
|
|
out: |
|
for (i = 0; i < mp4_descr_count; i++) |
|
av_free(mp4_descr[i].dec_config_descr); |
|
} |
|
|
|
static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len) |
|
{ |
|
MpegTSContext *ts = filter->u.section_filter.opaque; |
|
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); |
|
|
|
p_end = section + section_len - 4; |
|
p = section; |
|
if (parse_section_header(h, &p, p_end) < 0) |
|
return; |
|
if (h->tid != PAT_TID) |
|
return; |
|
if (ts->skip_changes) |
|
return; |
|
|
|
ts->stream->ts_id = h->id; |
|
|
|
clear_programs(ts); |
|
for (;;) { |
|
sid = get16(&p, p_end); |
|
if (sid < 0) |
|
break; |
|
pmt_pid = get16(&p, p_end); |
|
if (pmt_pid < 0) |
|
break; |
|
pmt_pid &= 0x1fff; |
|
|
|
if (pmt_pid == ts->current_pid) |
|
break; |
|
|
|
av_dlog(ts->stream, "sid=0x%x pid=0x%x\n", sid, pmt_pid); |
|
|
|
if (sid == 0x0000) { |
|
/* NIT info */ |
|
} else { |
|
MpegTSFilter *fil = ts->pids[pmt_pid]; |
|
program = av_new_program(ts->stream, sid); |
|
if (program) { |
|
program->program_num = sid; |
|
program->pmt_pid = pmt_pid; |
|
} |
|
if (fil) |
|
if ( fil->type != MPEGTS_SECTION |
|
|| fil->pid != pmt_pid |
|
|| fil->u.section_filter.section_cb != pmt_cb) |
|
mpegts_close_filter(ts, ts->pids[pmt_pid]); |
|
|
|
if (!ts->pids[pmt_pid]) |
|
mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1); |
|
add_pat_entry(ts, sid); |
|
add_pid_to_pmt(ts, sid, 0); // add pat pid to program |
|
add_pid_to_pmt(ts, sid, pmt_pid); |
|
} |
|
} |
|
|
|
if (sid < 0) { |
|
int i,j; |
|
for (j=0; j<ts->stream->nb_programs; j++) { |
|
for (i = 0; i < ts->nb_prg; i++) |
|
if (ts->prg[i].id == ts->stream->programs[j]->id) |
|
break; |
|
if (i==ts->nb_prg && !ts->skip_clear) |
|
clear_avprogram(ts, ts->stream->programs[j]->id); |
|
} |
|
} |
|
} |
|
|
|
static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len) |
|
{ |
|
MpegTSContext *ts = filter->u.section_filter.opaque; |
|
SectionHeader h1, *h = &h1; |
|
const uint8_t *p, *p_end, *desc_list_end, *desc_end; |
|
int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type; |
|
char *name, *provider_name; |
|
|
|
av_dlog(ts->stream, "SDT:\n"); |
|
hex_dump_debug(ts->stream, section, section_len); |
|
|
|
p_end = section + section_len - 4; |
|
p = section; |
|
if (parse_section_header(h, &p, p_end) < 0) |
|
return; |
|
if (h->tid != SDT_TID) |
|
return; |
|
if (ts->skip_changes) |
|
return; |
|
onid = get16(&p, p_end); |
|
if (onid < 0) |
|
return; |
|
val = get8(&p, p_end); |
|
if (val < 0) |
|
return; |
|
for (;;) { |
|
sid = get16(&p, p_end); |
|
if (sid < 0) |
|
break; |
|
val = get8(&p, p_end); |
|
if (val < 0) |
|
break; |
|
desc_list_len = get16(&p, p_end); |
|
if (desc_list_len < 0) |
|
break; |
|
desc_list_len &= 0xfff; |
|
desc_list_end = p + desc_list_len; |
|
if (desc_list_end > p_end) |
|
break; |
|
for (;;) { |
|
desc_tag = get8(&p, desc_list_end); |
|
if (desc_tag < 0) |
|
break; |
|
desc_len = get8(&p, desc_list_end); |
|
desc_end = p + desc_len; |
|
if (desc_len < 0 || desc_end > desc_list_end) |
|
break; |
|
|
|
av_dlog(ts->stream, "tag: 0x%02x len=%d\n", |
|
desc_tag, desc_len); |
|
|
|
switch (desc_tag) { |
|
case 0x48: |
|
service_type = get8(&p, p_end); |
|
if (service_type < 0) |
|
break; |
|
provider_name = getstr8(&p, p_end); |
|
if (!provider_name) |
|
break; |
|
name = getstr8(&p, p_end); |
|
if (name) { |
|
AVProgram *program = av_new_program(ts->stream, sid); |
|
if (program) { |
|
av_dict_set(&program->metadata, "service_name", name, 0); |
|
av_dict_set(&program->metadata, "service_provider", |
|
provider_name, 0); |
|
} |
|
} |
|
av_free(name); |
|
av_free(provider_name); |
|
break; |
|
default: |
|
break; |
|
} |
|
p = desc_end; |
|
} |
|
p = desc_list_end; |
|
} |
|
} |
|
|
|
static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, |
|
const uint8_t *packet); |
|
|
|
/* handle one TS packet */ |
|
static int handle_packet(MpegTSContext *ts, const uint8_t *packet) |
|
{ |
|
MpegTSFilter *tss; |
|
int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity, |
|
has_adaptation, has_payload; |
|
const uint8_t *p, *p_end; |
|
int64_t pos; |
|
|
|
pid = AV_RB16(packet + 1) & 0x1fff; |
|
if (pid && discard_pid(ts, pid)) |
|
return 0; |
|
is_start = packet[1] & 0x40; |
|
tss = ts->pids[pid]; |
|
if (ts->auto_guess && !tss && is_start) { |
|
add_pes_stream(ts, pid, -1); |
|
tss = ts->pids[pid]; |
|
} |
|
if (!tss) |
|
return 0; |
|
ts->current_pid = pid; |
|
|
|
afc = (packet[3] >> 4) & 3; |
|
if (afc == 0) /* reserved value */ |
|
return 0; |
|
has_adaptation = afc & 2; |
|
has_payload = afc & 1; |
|
is_discontinuity = has_adaptation && |
|
packet[4] != 0 && /* with length > 0 */ |
|
(packet[5] & 0x80); /* and discontinuity indicated */ |
|
|
|
/* continuity check (currently not used) */ |
|
cc = (packet[3] & 0xf); |
|
expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc; |
|
cc_ok = pid == 0x1FFF || // null packet PID |
|
is_discontinuity || |
|
tss->last_cc < 0 || |
|
expected_cc == cc; |
|
|
|
tss->last_cc = cc; |
|
if (!cc_ok) { |
|
av_log(ts->stream, AV_LOG_DEBUG, |
|
"Continuity check failed for pid %d expected %d got %d\n", |
|
pid, expected_cc, cc); |
|
if (tss->type == MPEGTS_PES) { |
|
PESContext *pc = tss->u.pes_filter.opaque; |
|
pc->flags |= AV_PKT_FLAG_CORRUPT; |
|
} |
|
} |
|
|
|
p = packet + 4; |
|
if (has_adaptation) { |
|
int64_t pcr_h; |
|
int pcr_l; |
|
if (parse_pcr(&pcr_h, &pcr_l, packet) == 0) |
|
tss->last_pcr = pcr_h * 300 + pcr_l; |
|
/* skip adaptation field */ |
|
p += p[0] + 1; |
|
} |
|
/* if past the end of packet, ignore */ |
|
p_end = packet + TS_PACKET_SIZE; |
|
if (p >= p_end || !has_payload) |
|
return 0; |
|
|
|
pos = avio_tell(ts->stream->pb); |
|
if (pos >= 0) { |
|
av_assert0(pos >= TS_PACKET_SIZE); |
|
ts->pos47_full = pos - TS_PACKET_SIZE; |
|
} |
|
|
|
if (tss->type == MPEGTS_SECTION) { |
|
if (is_start) { |
|
/* pointer field present */ |
|
len = *p++; |
|
if (p + len > p_end) |
|
return 0; |
|
if (len && cc_ok) { |
|
/* write remaining section bytes */ |
|
write_section_data(ts, tss, |
|
p, len, 0); |
|
/* check whether filter has been closed */ |
|
if (!ts->pids[pid]) |
|
return 0; |
|
} |
|
p += len; |
|
if (p < p_end) { |
|
write_section_data(ts, tss, |
|
p, p_end - p, 1); |
|
} |
|
} else { |
|
if (cc_ok) { |
|
write_section_data(ts, tss, |
|
p, p_end - p, 0); |
|
} |
|
} |
|
|
|
// stop find_stream_info from waiting for more streams |
|
// when all programs have received a PMT |
|
if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) { |
|
int i; |
|
for (i = 0; i < ts->nb_prg; i++) { |
|
if (!ts->prg[i].pmt_found) |
|
break; |
|
} |
|
if (i == ts->nb_prg && ts->nb_prg > 0) { |
|
int types = 0; |
|
for (i = 0; i < ts->stream->nb_streams; i++) { |
|
AVStream *st = ts->stream->streams[i]; |
|
types |= 1<<st->codec->codec_type; |
|
} |
|
if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) { |
|
av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n"); |
|
ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER; |
|
} |
|
} |
|
} |
|
|
|
} else { |
|
int ret; |
|
// Note: The position here points actually behind the current packet. |
|
if (tss->type == MPEGTS_PES) { |
|
if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start, |
|
pos - ts->raw_packet_size)) < 0) |
|
return ret; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void reanalyze(MpegTSContext *ts) { |
|
AVIOContext *pb = ts->stream->pb; |
|
int64_t pos = avio_tell(pb); |
|
if (pos < 0) |
|
return; |
|
pos -= ts->pos47_full; |
|
if (pos == TS_PACKET_SIZE) { |
|
ts->size_stat[0] ++; |
|
} else if (pos == TS_DVHS_PACKET_SIZE) { |
|
ts->size_stat[1] ++; |
|
} else if (pos == TS_FEC_PACKET_SIZE) { |
|
ts->size_stat[2] ++; |
|
} |
|
|
|
ts->size_stat_count ++; |
|
if (ts->size_stat_count > SIZE_STAT_THRESHOLD) { |
|
int newsize = 0; |
|
if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) { |
|
newsize = TS_PACKET_SIZE; |
|
} else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) { |
|
newsize = TS_DVHS_PACKET_SIZE; |
|
} else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) { |
|
newsize = TS_FEC_PACKET_SIZE; |
|
} |
|
if (newsize && newsize != ts->raw_packet_size) { |
|
av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize); |
|
ts->raw_packet_size = newsize; |
|
} |
|
ts->size_stat_count = 0; |
|
memset(ts->size_stat, 0, sizeof(ts->size_stat)); |
|
} |
|
} |
|
|
|
/* XXX: try to find a better synchro over several packets (use |
|
* get_packet_size() ?) */ |
|
static int mpegts_resync(AVFormatContext *s) |
|
{ |
|
MpegTSContext *ts = s->priv_data; |
|
AVIOContext *pb = s->pb; |
|
int c, i; |
|
|
|
for (i = 0; i < ts->resync_size; i++) { |
|
c = avio_r8(pb); |
|
if (avio_feof(pb)) |
|
return AVERROR_EOF; |
|
if (c == 0x47) { |
|
avio_seek(pb, -1, SEEK_CUR); |
|
reanalyze(s->priv_data); |
|
return 0; |
|
} |
|
} |
|
av_log(s, AV_LOG_ERROR, |
|
"max resync size reached, could not find sync byte\n"); |
|
/* no sync found */ |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
/* return AVERROR_something if error or EOF. Return 0 if OK. */ |
|
static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size, |
|
const uint8_t **data) |
|
{ |
|
AVIOContext *pb = s->pb; |
|
int len; |
|
|
|
for (;;) { |
|
len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data); |
|
if (len != TS_PACKET_SIZE) |
|
return len < 0 ? len : AVERROR_EOF; |
|
/* check packet sync byte */ |
|
if ((*data)[0] != 0x47) { |
|
/* find a new packet start */ |
|
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 |
|
continue; |
|
} else { |
|
break; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
static void finished_reading_packet(AVFormatContext *s, int raw_packet_size) |
|
{ |
|
AVIOContext *pb = s->pb; |
|
int skip = raw_packet_size - TS_PACKET_SIZE; |
|
if (skip > 0) |
|
avio_skip(pb, skip); |
|
} |
|
|
|
static int handle_packets(MpegTSContext *ts, int64_t nb_packets) |
|
{ |
|
AVFormatContext *s = ts->stream; |
|
uint8_t packet[TS_PACKET_SIZE + FF_INPUT_BUFFER_PADDING_SIZE]; |
|
const uint8_t *data; |
|
int64_t packet_num; |
|
int ret = 0; |
|
|
|
if (avio_tell(s->pb) != ts->last_pos) { |
|
int i; |
|
av_dlog(ts->stream, "Skipping after seek\n"); |
|
/* seek detected, flush pes buffer */ |
|
for (i = 0; i < NB_PID_MAX; i++) { |
|
if (ts->pids[i]) { |
|
if (ts->pids[i]->type == MPEGTS_PES) { |
|
PESContext *pes = ts->pids[i]->u.pes_filter.opaque; |
|
av_buffer_unref(&pes->buffer); |
|
pes->data_index = 0; |
|
pes->state = MPEGTS_SKIP; /* skip until pes header */ |
|
} |
|
ts->pids[i]->last_cc = -1; |
|
ts->pids[i]->last_pcr = -1; |
|
} |
|
} |
|
} |
|
|
|
ts->stop_parse = 0; |
|
packet_num = 0; |
|
memset(packet + TS_PACKET_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE); |
|
for (;;) { |
|
packet_num++; |
|
if (nb_packets != 0 && packet_num >= nb_packets || |
|
ts->stop_parse > 1) { |
|
ret = AVERROR(EAGAIN); |
|
break; |
|
} |
|
if (ts->stop_parse > 0) |
|
break; |
|
|
|
ret = read_packet(s, packet, ts->raw_packet_size, &data); |
|
if (ret != 0) |
|
break; |
|
ret = handle_packet(ts, data); |
|
finished_reading_packet(s, ts->raw_packet_size); |
|
if (ret != 0) |
|
break; |
|
} |
|
ts->last_pos = avio_tell(s->pb); |
|
return ret; |
|
} |
|
|
|
static int mpegts_probe(AVProbeData *p) |
|
{ |
|
const int size = p->buf_size; |
|
int maxscore = 0; |
|
int sumscore = 0; |
|
int i; |
|
int check_count = size / TS_FEC_PACKET_SIZE; |
|
#define CHECK_COUNT 10 |
|
#define CHECK_BLOCK 100 |
|
|
|
if (check_count < CHECK_COUNT) |
|
return AVERROR_INVALIDDATA; |
|
|
|
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); |
|
|
|
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; |
|
} |
|
|
|
/* return the 90kHz PCR and the extension for the 27MHz PCR. return |
|
* (-1) if not available */ |
|
static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet) |
|
{ |
|
int afc, len, flags; |
|
const uint8_t *p; |
|
unsigned int v; |
|
|
|
afc = (packet[3] >> 4) & 3; |
|
if (afc <= 1) |
|
return AVERROR_INVALIDDATA; |
|
p = packet + 4; |
|
len = p[0]; |
|
p++; |
|
if (len == 0) |
|
return AVERROR_INVALIDDATA; |
|
flags = *p++; |
|
len--; |
|
if (!(flags & 0x10)) |
|
return AVERROR_INVALIDDATA; |
|
if (len < 6) |
|
return AVERROR_INVALIDDATA; |
|
v = AV_RB32(p); |
|
*ppcr_high = ((int64_t) v << 1) | (p[4] >> 7); |
|
*ppcr_low = ((p[4] & 1) << 8) | p[5]; |
|
return 0; |
|
} |
|
|
|
static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) { |
|
|
|
/* NOTE: We attempt to seek on non-seekable files as well, as the |
|
* probe buffer usually is big enough. Only warn if the seek failed |
|
* on files where the seek should work. */ |
|
if (avio_seek(pb, pos, SEEK_SET) < 0) |
|
av_log(s, pb->seekable ? 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[8 * 1024] = {0}; |
|
int len; |
|
int64_t pos, probesize = s->probesize ? s->probesize : s->probesize2; |
|
|
|
if (ffio_ensure_seekback(pb, probesize) < 0) |
|
av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n"); |
|
|
|
/* read the first 8192 bytes to get packet size */ |
|
pos = avio_tell(pb); |
|
len = avio_read(pb, buf, sizeof(buf)); |
|
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; |
|
|
|
if (s->iformat == &ff_mpegts_demuxer) { |
|
/* normal demux */ |
|
|
|
/* first do a scan to get all the services */ |
|
seek_back(s, pb, pos); |
|
|
|
mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1); |
|
|
|
mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1); |
|
|
|
handle_packets(ts, probesize / ts->raw_packet_size); |
|
/* if could not find service, enable auto_guess */ |
|
|
|
ts->auto_guess = 1; |
|
|
|
av_dlog(ts->stream, "tuning done\n"); |
|
|
|
s->ctx_flags |= AVFMTCTX_NOHEADER; |
|
} else { |
|
AVStream *st; |
|
int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l; |
|
int64_t pcrs[2], pcr_h; |
|
int packet_count[2]; |
|
uint8_t packet[TS_PACKET_SIZE]; |
|
const uint8_t *data; |
|
|
|
/* only read packets */ |
|
|
|
st = avformat_new_stream(s, NULL); |
|
if (!st) |
|
return AVERROR(ENOMEM); |
|
avpriv_set_pts_info(st, 60, 1, 27000000); |
|
st->codec->codec_type = AVMEDIA_TYPE_DATA; |
|
st->codec->codec_id = AV_CODEC_ID_MPEG2TS; |
|
|
|
/* we iterate until we find two PCRs to estimate the bitrate */ |
|
pcr_pid = -1; |
|
nb_pcrs = 0; |
|
nb_packets = 0; |
|
for (;;) { |
|
ret = read_packet(s, packet, ts->raw_packet_size, &data); |
|
if (ret < 0) |
|
return ret; |
|
pid = AV_RB16(data + 1) & 0x1fff; |
|
if ((pcr_pid == -1 || pcr_pid == pid) && |
|
parse_pcr(&pcr_h, &pcr_l, data) == 0) { |
|
finished_reading_packet(s, ts->raw_packet_size); |
|
pcr_pid = pid; |
|
packet_count[nb_pcrs] = nb_packets; |
|
pcrs[nb_pcrs] = pcr_h * 300 + pcr_l; |
|
nb_pcrs++; |
|
if (nb_pcrs >= 2) |
|
break; |
|
} else { |
|
finished_reading_packet(s, ts->raw_packet_size); |
|
} |
|
nb_packets++; |
|
} |
|
|
|
/* NOTE1: the bitrate is computed without the FEC */ |
|
/* NOTE2: it is only the bitrate of the start of the stream */ |
|
ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]); |
|
ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0]; |
|
s->bit_rate = TS_PACKET_SIZE * 8 * 27e6 / ts->pcr_incr; |
|
st->codec->bit_rate = s->bit_rate; |
|
st->start_time = ts->cur_pcr; |
|
av_dlog(ts->stream, "start=%0.3f pcr=%0.3f incr=%d\n", |
|
st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr); |
|
} |
|
|
|
seek_back(s, pb, pos); |
|
return 0; |
|
} |
|
|
|
#define MAX_PACKET_READAHEAD ((128 * 1024) / 188) |
|
|
|
static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
MpegTSContext *ts = s->priv_data; |
|
int ret, i; |
|
int64_t pcr_h, next_pcr_h, pos; |
|
int pcr_l, next_pcr_l; |
|
uint8_t pcr_buf[12]; |
|
const uint8_t *data; |
|
|
|
if (av_new_packet(pkt, TS_PACKET_SIZE) < 0) |
|
return AVERROR(ENOMEM); |
|
ret = read_packet(s, pkt->data, ts->raw_packet_size, &data); |
|
pkt->pos = avio_tell(s->pb); |
|
if (ret < 0) { |
|
av_free_packet(pkt); |
|
return ret; |
|
} |
|
if (data != pkt->data) |
|
memcpy(pkt->data, data, ts->raw_packet_size); |
|
finished_reading_packet(s, ts->raw_packet_size); |
|
if (ts->mpeg2ts_compute_pcr) { |
|
/* compute exact PCR for each packet */ |
|
if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) { |
|
/* we read the next PCR (XXX: optimize it by using a bigger buffer */ |
|
pos = avio_tell(s->pb); |
|
for (i = 0; i < MAX_PACKET_READAHEAD; i++) { |
|
avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET); |
|
avio_read(s->pb, pcr_buf, 12); |
|
if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) { |
|
/* XXX: not precise enough */ |
|
ts->pcr_incr = |
|
((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) / |
|
(i + 1); |
|
break; |
|
} |
|
} |
|
avio_seek(s->pb, pos, SEEK_SET); |
|
/* no next PCR found: we use previous increment */ |
|
ts->cur_pcr = pcr_h * 300 + pcr_l; |
|
} |
|
pkt->pts = ts->cur_pcr; |
|
pkt->duration = ts->pcr_incr; |
|
ts->cur_pcr += ts->pcr_incr; |
|
} |
|
pkt->stream_index = 0; |
|
return 0; |
|
} |
|
|
|
static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
MpegTSContext *ts = s->priv_data; |
|
int ret, i; |
|
|
|
pkt->size = -1; |
|
ts->pkt = pkt; |
|
ret = handle_packets(ts, 0); |
|
if (ret < 0) { |
|
av_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) { |
|
PESContext *pes = ts->pids[i]->u.pes_filter.opaque; |
|
if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) { |
|
new_pes_packet(pes, pkt); |
|
pes->state = MPEGTS_SKIP; |
|
ret = 0; |
|
break; |
|
} |
|
} |
|
} |
|
|
|
if (!ret && pkt->size < 0) |
|
ret = AVERROR(EINTR); |
|
return ret; |
|
} |
|
|
|
static void mpegts_free(MpegTSContext *ts) |
|
{ |
|
int i; |
|
|
|
clear_programs(ts); |
|
|
|
for (i = 0; i < NB_PID_MAX; i++) |
|
if (ts->pids[i]) |
|
mpegts_close_filter(ts, ts->pids[i]); |
|
} |
|
|
|
static int mpegts_read_close(AVFormatContext *s) |
|
{ |
|
MpegTSContext *ts = s->priv_data; |
|
mpegts_free(ts); |
|
return 0; |
|
} |
|
|
|
static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index, |
|
int64_t *ppos, int64_t pos_limit) |
|
{ |
|
MpegTSContext *ts = s->priv_data; |
|
int64_t pos, timestamp; |
|
uint8_t buf[TS_PACKET_SIZE]; |
|
int pcr_l, pcr_pid = |
|
((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid; |
|
int pos47 = ts->pos47_full % ts->raw_packet_size; |
|
pos = |
|
((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * |
|
ts->raw_packet_size + pos47; |
|
while(pos < pos_limit) { |
|
if (avio_seek(s->pb, pos, SEEK_SET) < 0) |
|
return AV_NOPTS_VALUE; |
|
if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE) |
|
return AV_NOPTS_VALUE; |
|
if (buf[0] != 0x47) { |
|
avio_seek(s->pb, -TS_PACKET_SIZE, SEEK_CUR); |
|
if (mpegts_resync(s) < 0) |
|
return AV_NOPTS_VALUE; |
|
pos = avio_tell(s->pb); |
|
continue; |
|
} |
|
if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) && |
|
parse_pcr(×tamp, &pcr_l, buf) == 0) { |
|
*ppos = pos; |
|
return timestamp; |
|
} |
|
pos += ts->raw_packet_size; |
|
} |
|
|
|
return AV_NOPTS_VALUE; |
|
} |
|
|
|
static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index, |
|
int64_t *ppos, int64_t pos_limit) |
|
{ |
|
MpegTSContext *ts = s->priv_data; |
|
int64_t pos; |
|
int pos47 = ts->pos47_full % ts->raw_packet_size; |
|
pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47; |
|
ff_read_frame_flush(s); |
|
if (avio_seek(s->pb, pos, SEEK_SET) < 0) |
|
return AV_NOPTS_VALUE; |
|
while(pos < pos_limit) { |
|
int ret; |
|
AVPacket pkt; |
|
av_init_packet(&pkt); |
|
ret = av_read_frame(s, &pkt); |
|
if (ret < 0) |
|
return AV_NOPTS_VALUE; |
|
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; |
|
} |
|
|
|
return AV_NOPTS_VALUE; |
|
} |
|
|
|
/**************************************************************/ |
|
/* parsing functions - called from other demuxers such as RTP */ |
|
|
|
MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s) |
|
{ |
|
MpegTSContext *ts; |
|
|
|
ts = av_mallocz(sizeof(MpegTSContext)); |
|
if (!ts) |
|
return NULL; |
|
/* no stream case, currently used by RTP */ |
|
ts->raw_packet_size = TS_PACKET_SIZE; |
|
ts->stream = s; |
|
ts->auto_guess = 1; |
|
mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1); |
|
mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1); |
|
|
|
return ts; |
|
} |
|
|
|
/* return the consumed length if a packet was output, or -1 if no |
|
* packet is output */ |
|
int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt, |
|
const uint8_t *buf, int len) |
|
{ |
|
int len1; |
|
|
|
len1 = len; |
|
ts->pkt = pkt; |
|
for (;;) { |
|
ts->stop_parse = 0; |
|
if (len < TS_PACKET_SIZE) |
|
return AVERROR_INVALIDDATA; |
|
if (buf[0] != 0x47) { |
|
buf++; |
|
len--; |
|
} else { |
|
handle_packet(ts, buf); |
|
buf += TS_PACKET_SIZE; |
|
len -= TS_PACKET_SIZE; |
|
if (ts->stop_parse == 1) |
|
break; |
|
} |
|
} |
|
return len1 - len; |
|
} |
|
|
|
void avpriv_mpegts_parse_close(MpegTSContext *ts) |
|
{ |
|
mpegts_free(ts); |
|
av_free(ts); |
|
} |
|
|
|
AVInputFormat ff_mpegts_demuxer = { |
|
.name = "mpegts", |
|
.long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"), |
|
.priv_data_size = sizeof(MpegTSContext), |
|
.read_probe = mpegts_probe, |
|
.read_header = mpegts_read_header, |
|
.read_packet = mpegts_read_packet, |
|
.read_close = mpegts_read_close, |
|
.read_timestamp = mpegts_get_dts, |
|
.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT, |
|
.priv_class = &mpegts_class, |
|
}; |
|
|
|
AVInputFormat ff_mpegtsraw_demuxer = { |
|
.name = "mpegtsraw", |
|
.long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"), |
|
.priv_data_size = sizeof(MpegTSContext), |
|
.read_header = mpegts_read_header, |
|
.read_packet = mpegts_raw_read_packet, |
|
.read_close = mpegts_read_close, |
|
.read_timestamp = mpegts_get_dts, |
|
.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT, |
|
.priv_class = &mpegtsraw_class, |
|
};
|
|
|