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mpegts-mythtv.c
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mpegts-mythtv.c
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/*
* MPEG-2 transport stream (aka DVB) demuxer
* Copyright (c) 2002-2003 Fabrice Bellard
* Reworked for use with MythTV
*
* 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/common.h"
#include "libavutil/crc.h"
#include "libavutil/internal.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 "libavutil/dovi_meta.h"
#include "libavcodec/bytestream.h"
#include "libavcodec/get_bits.h"
#include "libavcodec/opus.h"
#include "avformat.h"
#include "mpegts-mythtv.h"
#include "internal.h"
#include "avio_internal.h"
#include "mpeg.h"
#include "isom.h"
#if CONFIG_ICONV
#include <iconv.h>
#endif
// MythTV only -----------------------------------------------------------------
/* from APIchanges:
2011-10-19 - d049257 / 569129a - lavf 53.17.0 / 53.10.0
Add avformat_new_stream(). Deprecate av_new_stream().
*/
static AVStream *av_new_stream(AVFormatContext *s, int id)
{
AVStream *st = avformat_new_stream(s, NULL);
if (st)
st->id = id;
return st;
}
static void av_set_pts_info(AVStream *s, int pts_wrap_bits,
unsigned int pts_num, unsigned int pts_den)
{
avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den);
}
/**
* av_dlog macros
* copied from libavutil/log.h since they are deprecated and removed from there
* Useful to print debug messages that shouldn't get compiled in normally.
*/
#ifdef DEBUG
# define av_dlog(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
#else
# define av_dlog(pctx, ...) do { if (0) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__); } while (0)
#endif
#define PMT_NOT_YET_FOUND 0
#define PMT_NOT_IN_PAT 1
#define PMT_FOUND 2
typedef struct SectionContext {
int pid;
int stream_type;
int new_packet;
MpegTSContext *ts;
AVFormatContext *stream;
AVStream *st;
} SectionContext;
static SectionContext *add_section_stream(MpegTSContext *ts, int pid, int stream_type);
static void mpegts_cleanup_streams(MpegTSContext *ts);
static int find_in_list(const int *pids, int pid);
static int is_pat_same(MpegTSContext *mpegts_ctx,
int *pmt_pnums, int *pmts_pids, unsigned int pmt_count);
static void mpegts_add_stream(MpegTSContext *ts, int id, pmt_entry_t* item, uint32_t prog_reg_desc, int pcr_pid);
static void mpegts_remove_stream(MpegTSContext *ts, int pid);
static int pmt_equal_streams(MpegTSContext *mpegts_ctx,
pmt_entry_t* items, int item_cnt);
/**
* @brief Remove a stream from a media stream.
*
* This is used by mpegts, so we can track streams as indicated by the PMT.
*
* @param s MPEG media stream handle
* @param id stream id of stream to remove
* @param remove_ts if true, remove any matching MPEG-TS filter as well
*/
static void av_mpegts_remove_stream(AVFormatContext *s, int id) {
int i;
int changes = 0;
for (i=0; i<s->nb_streams; i++) {
AVCodecContext *codec_ctx;
if (s->streams[i]->id != id)
continue;
av_log(NULL, AV_LOG_DEBUG, "av_mpegts_remove_stream 0x%x\n", id);
/* close codec context */
codec_ctx = s->streams[i]->codec;
if (codec_ctx->codec) {
avcodec_close(codec_ctx);
av_free(codec_ctx);
}
#if 0
/* make sure format context is not using the codec context */
if (&s->streams[i] == s->cur_st) {
av_log(NULL, AV_LOG_DEBUG, "av_mpegts_remove_stream cur_st = NULL\n");
s->cur_st = NULL;
}
#endif
/* else if (s->cur_st > &s->streams[i]) {
av_log(NULL, AV_LOG_DEBUG, "av_mpegts_remove_stream cur_st -= 1\n");
s->cur_st -= sizeof(AVFormatContext *);
} */
else {
av_log(NULL, AV_LOG_DEBUG,
"av_mpegts_remove_stream: no change to cur_st\n");
}
av_log(NULL, AV_LOG_DEBUG, "av_mpegts_remove_stream: removing... "
"s->nb_streams=%d i=%d\n", s->nb_streams, i);
/* actually remove av stream */
s->nb_streams--;
if ((s->nb_streams - i) > 0) {
memmove(&s->streams[i], &s->streams[i+1],
(s->nb_streams-i)*sizeof(AVFormatContext *));
}
else
s->streams[i] = NULL;
/* remove ts filter if remove ts is true and
* the format decoder is the "mpegts" decoder
*/
if (s->iformat && s->priv_data &&
(0 == strncmp(s->iformat->name, "mpegts", 6))) {
av_log(NULL, AV_LOG_DEBUG,
"av_mpegts_remove_stream: mpegts_remove_stream\n");
mpegts_remove_stream((MpegTSContext*) s->priv_data, id);
}
changes = 1;
}
if (changes)
{
// flush queued packets after a stream change (might need to make smarter)
mythtv_flush_packet_queue(s);
/* renumber the streams */
av_log(NULL, AV_LOG_DEBUG, "av_mpegts_remove_stream: renumbering streams\n");
for (i=0; i<s->nb_streams; i++)
s->streams[i]->index=i;
}
}
/** maximum number of PMT's we expect to be described in a PAT */
#define PAT_MAX_PMT 128
/** maximum number of streams we expect to be described in a PMT */
#define PMT_PIDS_MAX 256
// end MythTV only -------------------------------------------------------------
/* maximum size in which we look for synchronization if
* synchronization 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)
#define PROBE_PACKET_MAX_BUF 8192
#define PROBE_PACKET_MARGIN 5
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;
int last_ver;
unsigned crc;
unsigned last_crc;
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) */
enum MpegTSFilterType type;
/** if set, chop off PMT at the end of the TS packet, regardless of the
* data length given in the packet. This is for use by BBC iPlayer IPTV
* recordings which seem to only want to send the first packet of the PMT
* but give a length that requires 3 packets. Without this, those
* recordings are unplayable */
int pmt_chop_at_ts;
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 pid; // PMT PID
unsigned int nb_pids;
unsigned int pids[MAX_PIDS_PER_PROGRAM];
};
struct MpegTSContext {
const AVClass *class;
/* user data */
AVFormatContext *stream;
/** raw packet size, including FEC if present */
int raw_packet_size;
int pos47;
/** if true, all pids are analyzed to find streams */
int auto_guess;
/** compute exact PCR for each transport stream packet */
int mpeg2ts_compute_pcr;
int64_t cur_pcr; /**< used to estimate the exact PCR */
int pcr_incr; /**< used to estimate the exact PCR */
/** if set, stop_parse is set when PAT/PMT is found */
int scanning;
/* data needed to handle file based ts */
/** stop parsing loop */
int stop_parse;
/** set to PMT_NOT_IN_PAT in pat_cb when scanning is true
* and the MPEG program number "req_sid" is not found in PAT;
* set to PMT_FOUND when a PMT with a the "req_sid" program
* number is found. */
int pmt_scan_state;
/** packet containing Audio/Video data */
AVPacket *pkt;
/** to detect seek */
int64_t last_pos;
/******************************************/
/* private mpegts data */
/* scan context */
/** structure to keep track of Program->pids mapping */
unsigned int nb_prg;
struct Program *prg;
/** filter for the PAT */
MpegTSFilter *pat_filter;
/** filter for the PMT for the MPEG program number specified by req_sid */
MpegTSFilter *pmt_filter;
/** MPEG program number of stream we want to decode */
int req_sid;
/** filters for various streams specified by PMT + for the PAT and PMT */
MpegTSFilter *pids[NB_PID_MAX];
/** number of streams in the last PMT seen */
int pid_cnt;
/** list of streams in the last PMT seen */
int pmt_pids[PMT_PIDS_MAX];
};
static const AVOption options[] = {
{"compute_pcr", "Compute exact PCR for each transport stream packet.", offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_INT,
{.dbl = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
{ NULL },
};
static const AVClass mpegtsraw_class = {
.class_name = "mpegtsraw demuxer",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
/* TS stream handling */
enum MpegTSState {
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];
uint8_t *buffer;
SLConfigDescr sl;
} PESContext;
extern AVInputFormat ff_mythtv_mpegts_demuxer;
static void clear_program(MpegTSContext *ts, unsigned int programid)
{
int i;
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, unsigned int pid)
{
struct Program *p;
void *tmp = av_realloc(ts->prg, (ts->nb_prg+1)*sizeof(struct Program));
if(!tmp)
return;
ts->prg = tmp;
p = &ts->prg[ts->nb_prg];
p->id = programid;
p->pid = pid;
p->nb_pids = 0;
ts->nb_prg++;
}
static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid, unsigned int pid)
{
int i;
struct Program *p = NULL;
for(i=0; i<ts->nb_prg; i++) {
if(ts->prg[i].id == programid) {
p = &ts->prg[i];
break;
}
}
if(!p)
return;
if(p->nb_pids >= MAX_PIDS_PER_PROGRAM)
return;
p->pids[p->nb_pids++] = pid;
}
static void set_pcr_pid(AVFormatContext *s, unsigned int programid, unsigned int pid)
{
int i;
for(i=0; i<s->nb_programs; i++) {
if(s->programs[i]->id == programid) {
s->programs[i]->pcr_pid = pid;
break;
}
}
}
static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter);
/**
* @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;
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;
}
//ugly forward declaration
static void mpegts_push_section(MpegTSFilter *filter, const uint8_t *section, int section_len);
/** \fn write_section_data(AVFormatContext*,MpegTSFilter*,const uint8_t*,int,int)
* Assemble PES packets out of TS packets, and then call the "section_cb"
* function when they are complete.
*
* NOTE: "DVB Section" is DVB terminology for an MPEG PES packet.
*/
static void write_section_data(AVFormatContext *s, MpegTSFilter *tss1,
const uint8_t *buf, int buf_size, int is_start)
{
MpegTSSectionFilter *tss = &tss1->u.section_filter;
int len;
assert(tss->section_buf);
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;
}
if (tss->section_cb == mpegts_push_section) {
SectionContext *sect = tss->opaque;
sect->new_packet = 1;
}
while (!tss->end_of_section_reached) {
/* 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)
{
if (tss1->pmt_chop_at_ts && tss->section_buf[0] == PMT_TID)
{
/* HACK! To allow BBC IPTV streams with incomplete PMTs (they
* advertise a length of 383, but only send 182 bytes!), we
* will not wait for the remainder of the PMT, but accept just
* what is in the first TS payload, as this is enough to get
* playback, although some PIDs may be filtered out as a result
*/
tss->section_h_size = tss->section_index;
}
else
break;
}
if (!tss->check_crc ||
av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1,
tss->section_buf, tss->section_h_size) == 0)
tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
else
av_log(s, AV_LOG_WARNING, "write_section_data: PID %#x CRC error\n", tss1->pid);
if (tss->section_index > tss->section_h_size) {
int left = tss->section_index - tss->section_h_size;
memmove(tss->section_buf, tss->section_buf+tss->section_h_size,
left);
tss->section_index = left;
tss->section_h_size = -1;
} else {
tss->end_of_section_reached = 1;
}
}
}
static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, unsigned int pid,
SectionCallback *section_cb, void *opaque,
int check_crc)
{
MpegTSFilter *filter = ts->pids[pid];
MpegTSSectionFilter *sec;
av_dlog(ts->stream, "Filter: pid=0x%x\n", pid);
if (filter) {
#ifdef DEBUG
av_log(ts->stream, AV_LOG_DEBUG, "Filter Already Exists\n");
#endif
mpegts_close_filter(ts, filter);
}
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 = MPEGTS_SECTION;
filter->pid = pid;
filter->es_id = -1;
filter->last_cc = -1;
filter->pmt_chop_at_ts = 0;
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 (pid >= NB_PID_MAX || ts->pids[pid])
return NULL;
filter = av_mallocz(sizeof(MpegTSFilter));
if (!filter)
return NULL;
ts->pids[pid] = filter;
filter->type = MPEGTS_PES;
filter->pid = pid;
filter->es_id = -1;
filter->last_cc = -1;
pes = &filter->u.pes_filter;
pes->pes_cb = pes_cb;
pes->opaque = opaque;
return filter;
}
static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
{
int pid;
if (!ts || !filter)
return;
pid = filter->pid;
#ifdef DEBUG
av_log(NULL, AV_LOG_DEBUG, "Closing Filter: pid=0x%x\n", pid);
#endif
if (filter == ts->pmt_filter)
{
av_log(NULL, AV_LOG_DEBUG, "Closing PMT Filter: pid=0x%x\n", pid);
ts->pmt_filter = NULL;
}
if (filter == ts->pat_filter)
{
av_log(NULL, AV_LOG_DEBUG, "Closing PAT Filter: pid=0x%x\n", pid);
ts->pat_filter = NULL;
}
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_freep(&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 i;
int x=0;
int best_score=0;
memset(stat, 0, packet_size*sizeof(int));
for(x=i=0; i<size-3; i++){
if(buf[i] == 0x47 && !(buf[i+1] & 0x80) && buf[i+3] != 0x47){
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;
}
/* 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 -1;
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_log(NULL, AV_LOG_DEBUG, "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 -1;
}
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 -1;
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 -1;
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 -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;
#ifdef DEBUG
av_log(NULL, AV_LOG_DEBUG, "sid=0x%x sec_num=%d/%d\n",
h->id, h->sec_num, h->last_sec_num);
#endif
return 0;
}
/* mpegts_push_section: return one or more tables. The tables may not completely fill
the packet and there may be stuffing bytes at the end.
This is complicated because a single TS packet may result in several tables being
produced. We may have a "start" bit indicating, in effect, the end of a table but
the rest of the TS packet after the start may be filled with one or more small tables.
*/
static void mpegts_push_section(MpegTSFilter *filter, const uint8_t *section, int section_len)
{
SectionContext *sect = filter->u.section_filter.opaque;
MpegTSContext *ts = sect->ts;
SectionHeader header;
AVPacket *pkt = ts->pkt;
const uint8_t *p = section, *p_end = section + section_len - 4;
if (parse_section_header(&header, &p, p_end) < 0)
{
av_log(NULL, AV_LOG_DEBUG, "Unable to parse header\n");
return;
}
if (sect->new_packet && pkt && sect->st && pkt->size == 0) {
int pktLen = section_len + 184; /* Add enough for a complete TS payload. */
sect->new_packet = 0;
av_free_packet(pkt);
if (av_new_packet(pkt, pktLen) == 0) {
memcpy(pkt->data, section, section_len);
memset(pkt->data+section_len, 0xff, pktLen-section_len);
pkt->stream_index = sect->st->index;
ts->stop_parse = 1;
}
} else if (pkt->data) { /* We've already added at least one table. */
uint8_t *data = pkt->data;
int space = pkt->size;
int table_size = 0;
while (space > 3 + table_size) {
table_size = (((data[1] & 0xf) << 8) | data[2]) + 3;
if (table_size < space) {
space -= table_size;
data += table_size;
} /* Otherwise we've got filler. */
}
if (space < section_len) {
av_log(NULL, AV_LOG_DEBUG, "Insufficient space for additional packet\n");
return;
}
memcpy(data, section, section_len);
}
}
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 },
{ 0x0b, AVMEDIA_TYPE_DATA, AV_CODEC_ID_DSMCC_B }, /* DVB_CAROUSEL_ID */
{ 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
{ 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
{ 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
{ 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
{ 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
{ 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 },
{ 0x87, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
{ 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
{ 0x100, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE },
{ 0x101, AVMEDIA_TYPE_DATA, AV_CODEC_ID_DVB_VBI },
{ 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('V','C','-','1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
{ 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 },
{ 0x13, AVMEDIA_TYPE_DATA, AV_CODEC_ID_DSMCC_B }, /* DVB_CAROUSEL_ID */
{ 0x45, AVMEDIA_TYPE_DATA, AV_CODEC_ID_DVB_VBI }, /* DVB_VBI_DATA_ID */
{ 0x46, AVMEDIA_TYPE_DATA, AV_CODEC_ID_DVB_VBI }, /* DVB_VBI_TELETEXT_ID */ //FixMe type subtilte
{ 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
{ 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
{ 0 },
};
/* component tags */
static const StreamType COMPONENT_TAG_types[] = {
{ 0x0a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
{ 0x52, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
};
static void mpegts_find_stream_type(AVStream *st,
uint32_t stream_type, const StreamType *types)
{
for (; types->stream_type; types++) {
if (stream_type == types->stream_type) {
st->codecpar->codec_type = types->codec_type;
st->codecpar->codec_id = types->codec_id;
st->internal->request_probe = 0;
return;
}
}
}
static void mpegts_find_stream_type_pmt(pmt_entry_t *st,
uint32_t stream_type, const StreamType *types)
{
for (; types->stream_type; types++) {
if (stream_type == types->stream_type) {
st->codec_type = types->codec_type;
st->codec_id = types->codec_id;
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->codecpar->codec_type;
int old_codec_id = st->codecpar->codec_id;
avpriv_set_pts_info(st, 33, 1, 90000);
st->priv_data = pes;
st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
st->codecpar->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->codecpar->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->codecpar->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->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
sub_st->need_parsing = AVSTREAM_PARSE_FULL;
sub_pes->sub_st = pes->sub_st = sub_st;
}
}
if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
mpegts_find_stream_type(st, pes->stream_type, MISC_types);
if (st->codecpar->codec_id == AV_CODEC_ID_NONE){
st->codecpar->codec_id = old_codec_id;
st->codecpar->codec_type= old_codec_type;
}
return 0;
}
static void new_pes_packet(PESContext *pes, AVPacket *pkt)
{
av_packet_from_data(pkt, pes->buffer, 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, AV_INPUT_BUFFER_PADDING_SIZE);