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mpv/libmpdemux/demux_ts.c

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/*
* Demultiplexer for MPEG2 Transport Streams.
*
* Written by Nico <nsabbi@libero.it>
* Kind feedback is appreciated; 'sucks' and alike is not.
* Originally based on demux_pva.c written by Matteo Giani and FFmpeg (libavformat) sources
*
* This file is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This file 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "stream.h"
#include "demuxer.h"
#include "parse_es.h"
#include "stheader.h"
#include "bswap.h"
#include "../unrarlib.h"
#define TS_FEC_PACKET_SIZE 204
#define TS_PACKET_SIZE 188
#define NB_PID_MAX 8192
#define MAX_HEADER_SIZE 6 /* enough for PES header + length */
#define MAX_CHECK_SIZE 65535
#define TS_MAX_PROBE_SIZE 2000000 /* dont forget to change this in cfg-common.h too */
#define NUM_CONSECUTIVE_TS_PACKETS 32
#define NUM_CONSECUTIVE_AUDIO_PACKETS 348
#define MAX_A52_FRAME_SIZE 3840
int ts_prog;
int ts_keep_broken=0;
off_t ts_probe = TS_MAX_PROBE_SIZE;
extern char *dvdsub_lang, *audio_lang; //for -alang
typedef enum
{
UNKNOWN = -1,
VIDEO_MPEG1 = 0x10000001,
VIDEO_MPEG2 = 0x10000002,
VIDEO_MPEG4 = 0x10000004,
AUDIO_MP2 = 0x50,
AUDIO_A52 = 0x2000,
AUDIO_LPCM_BE = 0x10001,
AUDIO_AAC = mmioFOURCC('M', 'P', '4', 'A'),
SPU_DVD = 0x3000000,
SPU_DVB = 0x3000001,
PES_PRIVATE1 = 0xBD00000
} es_stream_type_t;
typedef struct {
int size;
unsigned char *start;
uint16_t payload_size;
es_stream_type_t type;
float pts, last_pts;
int pid;
char lang[4];
int last_cc; // last cc code (-1 if first packet)
uint64_t seen;
} ES_stream_t;
typedef struct MpegTSContext {
int packet_size; // raw packet size, including FEC if present e.g. 188 bytes
ES_stream_t *pids[NB_PID_MAX];
} MpegTSContext;
typedef struct {
demux_stream_t *ds;
demux_packet_t *pack;
int offset, buffer_size;
} av_fifo_t;
typedef struct {
uint8_t skip;
uint8_t table_id;
uint8_t ssi;
uint16_t section_length;
uint16_t ts_id;
uint8_t version_number;
uint8_t curr_next;
uint8_t section_number;
uint8_t last_section_number;
struct pat_progs_t {
uint16_t id;
uint16_t pmt_pid;
} *progs;
uint16_t progs_cnt;
char buffer[65535];
uint16_t buffer_len;
} pat_t;
typedef struct {
uint16_t progid;
uint8_t skip;
uint8_t table_id;
uint8_t ssi;
uint16_t section_length;
uint8_t version_number;
uint8_t curr_next;
uint8_t section_number;
uint8_t last_section_number;
uint16_t PCR_PID;
uint16_t prog_descr_length;
char buffer[2048];
uint16_t buffer_len;
uint16_t es_cnt;
struct pmt_es_t {
uint16_t pid;
uint32_t type; //it's 8 bit long, but cast to the right type as FOURCC
uint16_t descr_length;
uint8_t format_descriptor[5];
uint8_t lang[4];
} *es;
} pmt_t;
typedef struct {
MpegTSContext ts;
int last_pid;
av_fifo_t fifo[3]; //0 for audio, 1 for video, 2 for subs
pat_t pat;
pmt_t *pmt;
uint16_t pmt_cnt;
uint32_t prog;
int keep_broken;
} ts_priv_t;
static int ts_parse(demuxer_t *demuxer, ES_stream_t *es, unsigned char *packet, int probe);
extern void resync_audio_stream( sh_audio_t *sh_audio );
static uint8_t get_packet_size(const unsigned char *buf, int size)
{
int i;
if (size < (TS_FEC_PACKET_SIZE * NUM_CONSECUTIVE_TS_PACKETS))
return 0;
for(i=0; i<NUM_CONSECUTIVE_TS_PACKETS; i++)
{
if (buf[i * TS_PACKET_SIZE] != 0x47)
{
mp_msg(MSGT_DEMUX, MSGL_DBG2, "GET_PACKET_SIZE, pos %d, char: %2x\n", i, buf[i * TS_PACKET_SIZE]);
goto try_fec;
}
}
return TS_PACKET_SIZE;
try_fec:
for(i=0; i<NUM_CONSECUTIVE_TS_PACKETS; i++)
{
if (buf[i * TS_FEC_PACKET_SIZE] != 0x47)
return 0;
}
return TS_FEC_PACKET_SIZE;
}
int ts_check_file(demuxer_t * demuxer)
{
const int buf_size = (TS_FEC_PACKET_SIZE * NUM_CONSECUTIVE_TS_PACKETS);
unsigned char buf[TS_FEC_PACKET_SIZE * NUM_CONSECUTIVE_TS_PACKETS], done = 0, *ptr;
uint32_t _read, i, count = 0, is_ts;
int cc[NB_PID_MAX], last_cc[NB_PID_MAX], pid, cc_ok, c, good, bad;
uint8_t size = 0;
off_t pos = 0;
off_t init_pos;
mp_msg(MSGT_DEMUX, MSGL_V, "Checking for MPEG-TS...\n");
init_pos = stream_tell(demuxer->stream);
is_ts = 0;
while(! done)
{
i = 1;
c = 0;
while(((c=stream_read_char(demuxer->stream)) != 0x47)
&& (c >= 0)
&& (i < MAX_CHECK_SIZE)
&& ! demuxer->stream->eof
) i++;
if(c != 0x47)
{
mp_msg(MSGT_DEMUX, MSGL_V, "THIS DOESN'T LOOK LIKE AN MPEG-TS FILE!\n");
is_ts = 0;
done = 1;
continue;
}
pos = stream_tell(demuxer->stream) - 1;
buf[0] = c;
_read = stream_read(demuxer->stream, &buf[1], buf_size-1);
if(_read < buf_size-1)
{
mp_msg(MSGT_DEMUX, MSGL_V, "COULDN'T READ ENOUGH DATA, EXITING TS_CHECK\n");
stream_reset(demuxer->stream);
return 0;
}
size = get_packet_size(buf, buf_size);
if(size)
{
done = 1;
is_ts = 1;
}
if(pos - init_pos >= MAX_CHECK_SIZE)
{
done = 1;
is_ts = 0;
}
}
mp_msg(MSGT_DEMUX, MSGL_V, "TRIED UP TO POSITION %llu, FOUND %x, packet_size= %d, SEEMS A TS? %d\n", (uint64_t) pos, c, size, is_ts);
stream_seek(demuxer->stream, pos);
if(! is_ts)
return 0;
//LET'S CHECK continuity counters
good = bad = 0;
for(count = 0; count < NB_PID_MAX; count++)
{
cc[count] = last_cc[count] = -1;
}
for(count = 0; count < NUM_CONSECUTIVE_TS_PACKETS; count++)
{
ptr = &(buf[size * count]);
pid = ((ptr[1] & 0x1f) << 8) | ptr[2];
mp_msg(MSGT_DEMUX, MSGL_DBG2, "BUF: %02x %02x %02x %02x, PID %d, SIZE: %d \n",
ptr[0], ptr[1], ptr[2], ptr[3], pid, size);
if((pid == 8191) || (pid < 16))
continue;
cc[pid] = (ptr[3] & 0xf);
cc_ok = (last_cc[pid] < 0) || ((((last_cc[pid] + 1) & 0x0f) == cc[pid]));
mp_msg(MSGT_DEMUX, MSGL_DBG2, "PID %d, COMPARE CC %d AND LAST_CC %d\n", pid, cc[pid], last_cc[pid]);
if(! cc_ok)
//return 0;
bad++;
else
good++;
last_cc[pid] = cc[pid];
}
mp_msg(MSGT_DEMUX, MSGL_V, "GOOD CC: %d, BAD CC: %d\n", good, bad);
if(good >= bad)
return size;
else
return 0;
}
static inline int32_t progid_idx_in_pmt(ts_priv_t *priv, uint16_t progid)
{
int x;
if(priv->pmt == NULL)
return -1;
for(x = 0; x < priv->pmt_cnt; x++)
{
if(priv->pmt[x].progid == progid)
return x;
}
return -1;
}
static inline int32_t progid_for_pid(ts_priv_t *priv, int pid, int32_t req) //finds the first program listing a pid
{
int i, j;
pmt_t *pmt;
if(priv->pmt == NULL)
return -1;
for(i=0; i < priv->pmt_cnt; i++)
{
pmt = &(priv->pmt[i]);
if(pmt->es == NULL)
return -1;
for(j = 0; j < pmt->es_cnt; j++)
{
if(pmt->es[j].pid == pid)
{
if((req == 0) || (req == pmt->progid))
return pmt->progid;
}
}
}
return -1;
}
static inline int pid_match_lang(ts_priv_t *priv, uint16_t pid, char *lang)
{
uint16_t i, j;
pmt_t *pmt;
if(priv->pmt == NULL)
return -1;
for(i=0; i < priv->pmt_cnt; i++)
{
pmt = &(priv->pmt[i]);
if(pmt->es == NULL)
return -1;
for(j = 0; j < pmt->es_cnt; j++)
{
if(pmt->es[j].pid != pid)
continue;
mp_msg(MSGT_DEMUXER, MSGL_V, "CMP LANG %s AND %s, pids: %d %d\n",pmt->es[j].lang, lang, pmt->es[j].pid, pid);
if(strncmp(pmt->es[j].lang, lang, 3) == 0)
{
return 1;
}
}
}
return -1;
}
typedef struct {
int32_t atype, vtype, stype; //types
int32_t apid, vpid, spid; //stream ids
char slang[4], alang[4]; //languages
int16_t prog;
off_t probe;
} tsdemux_init_t;
//stripped down version of a52_syncinfo() from liba52
//copyright belongs to Michel Lespinasse <walken@zoy.org> and Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
static int a52_framesize(uint8_t * buf)
{
int rate[] = { 32, 40, 48, 56, 64, 80, 96, 112,
128, 160, 192, 224, 256, 320, 384, 448,
512, 576, 640
};
uint8_t halfrate[12] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3};
int frmsizecod, bitrate, half;
if((buf[0] != 0x0b) || (buf[1] != 0x77)) /* syncword */
return 0;
if(buf[5] >= 0x60) /* bsid >= 12 */
return 0;
half = halfrate[buf[5] >> 3];
frmsizecod = buf[4] & 63;
if(frmsizecod >= 38)
return 0;
bitrate = rate[frmsizecod >> 1];
switch(buf[4] & 0xc0)
{
case 0: /* 48 KHz */
return 4 * bitrate;
case 0x40: /* 44.1 KHz */
return 2 * (320 * bitrate / 147 + (frmsizecod & 1));
case 0x80: /* 32 KHz */
return 6 * bitrate;
}
return 0;
}
//second stage: returns the count of A52 syncwords found
static int a52_check(char *buf, int len)
{
int cnt, frame_length, ok;
cnt = ok = 0;
if(len < 8)
return 0;
while(cnt < len - 7)
{
if(buf[cnt] == 0x0B && buf[cnt+1] == 0x77)
{
frame_length = a52_framesize(&buf[cnt]);
if(frame_length>=7 && frame_length<=3840)
{
cnt += frame_length;
ok++;
}
else
cnt++;
}
else
cnt++;
}
mp_msg(MSGT_DEMUXER, MSGL_V, "A52_CHECK(%d input bytes), found %d frame syncwords of %d bytes length\n", len, ok, frame_length);
return ok;
}
static off_t ts_detect_streams(demuxer_t *demuxer, tsdemux_init_t *param)
{
int video_found = 0, audio_found = 0, sub_found = 0, i, num_packets = 0, req_apid, req_vpid, req_spid;
int is_audio, is_video, is_sub, has_tables;
int32_t p, chosen_pid = 0;
off_t pos=0, ret = 0, init_pos;
ES_stream_t es;
unsigned char tmp[TS_FEC_PACKET_SIZE];
ts_priv_t *priv = (ts_priv_t*) demuxer->priv;
struct {
char *buf;
int pos;
} pes_priv1[8192], *pptr;
priv->last_pid = 8192; //invalid pid
req_apid = param->apid;
req_vpid = param->vpid;
req_spid = param->spid;
has_tables = 0;
bzero(pes_priv1, sizeof(pes_priv1));
init_pos = stream_tell(demuxer->stream);
mp_msg(MSGT_DEMUXER, MSGL_INFO, "PROBING UP TO %llu, PROG: %d\n", (uint64_t) param->probe, param->prog);
while((pos <= init_pos + param->probe) && (! demuxer->stream->eof))
{
pos = stream_tell(demuxer->stream);
if(ts_parse(demuxer, &es, tmp, 1))
{
//Non PES-aligned A52 audio may escape detection if PMT is not present;
//in this case we try to find at least 3 A52 syncwords
if((es.type == PES_PRIVATE1) && (! audio_found))
{
pptr = &pes_priv1[es.pid];
pptr->buf = (char*) realloc(pptr->buf, pptr->pos + es.size);
if(pptr->buf != NULL)
{
memcpy(&(pptr->buf[ pptr->pos ]), es.start, es.size);
pptr->pos += es.size;
if(a52_check(pptr->buf, pptr->pos) > 2)
{
param->atype = AUDIO_A52;
es.type = AUDIO_A52;
}
}
}
is_audio = ((es.type == AUDIO_MP2) || (es.type == AUDIO_A52) || (es.type == AUDIO_LPCM_BE) || (es.type == AUDIO_AAC));
is_video = ((es.type == VIDEO_MPEG1) || (es.type == VIDEO_MPEG2) || (es.type == VIDEO_MPEG4));
is_sub = ((es.type == SPU_DVD) || (es.type == SPU_DVB));
if((! is_audio) && (! is_video) && (! is_sub))
continue;
if(is_video)
{
chosen_pid = (req_vpid == es.pid);
if((! chosen_pid) && (req_vpid > 0))
continue;
}
else if(is_audio)
{
if(req_apid > 0)
{
chosen_pid = (req_apid == es.pid);
if(! chosen_pid)
continue;
}
else if(param->alang[0] > 0)
{
if(pid_match_lang(priv, es.pid, param->alang) == -1)
continue;
chosen_pid = 1;
param->apid = req_apid = es.pid;
}
}
else if(is_sub)
{
chosen_pid = (req_spid == es.pid);
if((! chosen_pid) && (req_spid > 0))
continue;
}
if(req_apid < 0 && (param->alang[0] == 0) && req_vpid < 0 && req_spid < 0)
chosen_pid = 1;
if((ret == 0) && chosen_pid)
{
ret = stream_tell(demuxer->stream);
}
p = progid_for_pid(priv, es.pid, param->prog);
if(p != -1)
has_tables++;
if((param->prog == 0) && (p != -1))
{
if(chosen_pid)
param->prog = p;
}
if((param->prog > 0) && (param->prog != p))
{
if(audio_found)
{
if(is_video && (req_vpid == es.pid))
{
param->vtype = es.type;
param->vpid = es.pid;
video_found = 1;
break;
}
}
if(video_found)
{
if(is_audio && (req_apid == es.pid))
{
param->atype = es.type;
param->apid = es.pid;
audio_found = 1;
break;
}
}
continue;
}
mp_msg(MSGT_DEMUXER, MSGL_DBG2, "TYPE: %x, PID: %d, PROG FOUND: %d\n", es.type, es.pid, param->prog);
if(is_video)
{
if((req_vpid == -1) || (req_vpid == es.pid))
{
param->vtype = es.type;
param->vpid = es.pid;
video_found = 1;
}
}
if(((req_vpid == -2) || (num_packets >= NUM_CONSECUTIVE_AUDIO_PACKETS)) && audio_found)
{
//novideo or we have at least 348 audio packets (64 KB) without video (TS with audio only)
param->vtype = 0;
break;
}
if(is_sub)
{
if((req_spid == -1) || (req_spid == es.pid))
{
param->stype = es.type;
param->spid = es.pid;
sub_found = 1;
}
}
if(is_audio)
{
if((req_apid == -1) || (req_apid == es.pid))
{
param->atype = es.type;
param->apid = es.pid;
audio_found = 1;
}
}
if(audio_found && (param->apid == es.pid) && (! video_found))
num_packets++;
if((req_apid == -2) && video_found)
{
param->atype = 0;
break;
}
if((has_tables==0) && (video_found && audio_found) && (pos >= 1000000))
break;
}
}
for(i=0; i<8192; i++)
{
if(pes_priv1[i].buf != NULL)
{
free(pes_priv1[i].buf);
pes_priv1[i].buf = NULL;
pes_priv1[i].pos = 0;
}
}
if(video_found)
mp_msg(MSGT_DEMUXER, MSGL_INFO, "VIDEO MPEG%d(pid=%d)...", (param->vtype == VIDEO_MPEG1 ? 1 : (param->vtype == VIDEO_MPEG2 ? 2 : 4)), param->vpid);
else
{
video_found = 0;
param->vtype = UNKNOWN;
//WE DIDN'T MATCH ANY VIDEO STREAM
mp_msg(MSGT_DEMUXER, MSGL_INFO, "NO VIDEO! ");
}
if(param->atype == AUDIO_MP2)
mp_msg(MSGT_DEMUXER, MSGL_INFO, "AUDIO MPA(pid=%d)", param->apid);
else if(param->atype == AUDIO_A52)
mp_msg(MSGT_DEMUXER, MSGL_INFO, "AUDIO A52(pid=%d)", param->apid);
else if(param->atype == AUDIO_LPCM_BE)
mp_msg(MSGT_DEMUXER, MSGL_INFO, "AUDIO LPCM(pid=%d)", param->apid);
else if(param->atype == AUDIO_AAC)
mp_msg(MSGT_DEMUXER, MSGL_INFO, "AUDIO AAC(pid=%d)", param->apid);
else
{
audio_found = 0;
param->atype = UNKNOWN;
//WE DIDN'T MATCH ANY AUDIO STREAM, SO WE FORCE THE DEMUXER TO IGNORE AUDIO
mp_msg(MSGT_DEMUXER, MSGL_INFO, "NO AUDIO! ");
}
if(param->stype == SPU_DVD || param->stype == SPU_DVB)
mp_msg(MSGT_DEMUXER, MSGL_INFO, " SUB %s(pid=%d) ", (param->stype==SPU_DVD ? "DVD" : "DVB"), param->spid);
else
{
param->stype = UNKNOWN;
mp_msg(MSGT_DEMUXER, MSGL_INFO, " NO SUBS (yet)! ");
}
if(video_found || audio_found)
{
if(demuxer->stream->eof && (ret == 0))
ret = init_pos;
mp_msg(MSGT_DEMUXER, MSGL_INFO, " PROGRAM N. %d\n", param->prog);
}
else
mp_msg(MSGT_DEMUXER, MSGL_INFO, "\n");
for(i=0; i<8192; i++)
{
if(priv->ts.pids[i] != NULL)
{
priv->ts.pids[i]->payload_size = 0;
priv->ts.pids[i]->pts = priv->ts.pids[i]->last_pts = 0;
priv->ts.pids[i]->seen = 0;
priv->ts.pids[i]->last_cc = -1;
}
}
return ret;
}
demuxer_t *demux_open_ts(demuxer_t * demuxer)
{
int i;
uint8_t packet_size;
sh_video_t *sh_video;
sh_audio_t *sh_audio;
off_t start_pos;
tsdemux_init_t params;
ts_priv_t * priv = (ts_priv_t*) demuxer->priv;
mp_msg(MSGT_DEMUX, MSGL_INFO, "DEMUX OPEN, AUDIO_ID: %d, VIDEO_ID: %d, SUBTITLE_ID: %d,\n",
demuxer->audio->id, demuxer->video->id, demuxer->sub->id);
demuxer->type= DEMUXER_TYPE_MPEG_TS;
stream_reset(demuxer->stream);
packet_size = ts_check_file(demuxer);
if(!packet_size)
return NULL;
priv = malloc(sizeof(ts_priv_t));
if(priv == NULL)
{
mp_msg(MSGT_DEMUX, MSGL_FATAL, "DEMUX_OPEN_TS, couldn't allocate enough memory for ts->priv, exit\n");
return NULL;
}
for(i=0; i < 8192; i++)
priv->ts.pids[i] = NULL;
priv->pat.progs = NULL;
priv->pat.progs_cnt = 0;
priv->pmt = NULL;
priv->pmt_cnt = 0;
priv->keep_broken = ts_keep_broken;
priv->ts.packet_size = packet_size;
demuxer->priv = priv;
if(demuxer->stream->type != STREAMTYPE_FILE)
demuxer->seekable = 1;
else
demuxer->seekable = 1;
params.atype = params.vtype = params.stype = UNKNOWN;
params.apid = demuxer->audio->id;
params.vpid = demuxer->video->id;
params.spid = demuxer->sub->id;
params.prog = ts_prog;
params.probe = ts_probe;
if(dvdsub_lang != NULL)
{
strncpy(params.slang, dvdsub_lang, 3);
params.slang[3] = 0;
}
else
memset(params.slang, 0, 4);
if(audio_lang != NULL)
{
strncpy(params.alang, audio_lang, 3);
params.alang[3] = 0;
}
else
memset(params.alang, 0, 4);
start_pos = ts_detect_streams(demuxer, &params);
demuxer->audio->id = params.apid;
demuxer->video->id = params.vpid;
demuxer->sub->id = params.spid;
priv->prog = params.prog;
if(params.vtype != UNKNOWN)
{
if(params.vtype == VIDEO_MPEG4)
demuxer->file_format= DEMUXER_TYPE_MPEG4_IN_TS;
sh_video = new_sh_video(demuxer, 0);
sh_video->ds = demuxer->video;
sh_video->format = params.vtype;
demuxer->video->sh = sh_video;
}
if(params.atype != UNKNOWN)
{
sh_audio = new_sh_audio(demuxer, 0);
sh_audio->ds = demuxer->audio;
sh_audio->format = params.atype;
demuxer->audio->sh = sh_audio;
}
mp_msg(MSGT_DEMUXER,MSGL_INFO, "Opened TS demuxer, audio: %x(pid %d), video: %x(pid %d)...POS=%llu\n", params.atype, demuxer->audio->id, params.vtype, demuxer->video->id, (uint64_t) start_pos);
start_pos = (start_pos <= priv->ts.packet_size ? 0 : start_pos - priv->ts.packet_size);
demuxer->movi_start = start_pos;
stream_reset(demuxer->stream);
stream_seek(demuxer->stream, start_pos); //IF IT'S FROM A PIPE IT WILL FAIL, BUT WHO CARES?
priv->last_pid = 8192; //invalid pid
for(i = 0; i < 3; i++)
{
priv->fifo[i].pack = NULL;
priv->fifo[i].offset = 0;
}
priv->fifo[0].ds = demuxer->audio;
priv->fifo[1].ds = demuxer->video;
priv->fifo[2].ds = demuxer->sub;
priv->fifo[0].buffer_size = 1536;
priv->fifo[1].buffer_size = 32767;
priv->fifo[2].buffer_size = 32767;
priv->pat.buffer_len = 0;
demuxer->filepos = stream_tell(demuxer->stream);
return demuxer;
}
void demux_close_ts(demuxer_t * demuxer)
{
if(demuxer->priv)
{
free(demuxer->priv);
demuxer->priv=NULL;
}
}
static int pes_parse2(unsigned char *buf, uint16_t packet_len, ES_stream_t *es, int32_t type_from_pmt)
{
unsigned char *p;
uint32_t header_len;
int64_t pts;
uint32_t stream_id;
uint32_t pkt_len, pes_is_aligned;
//Here we are always at the start of a PES packet
mp_msg(MSGT_DEMUX, MSGL_DBG2, "pes_parse2(%p, %d): \n", buf, (uint32_t) packet_len);
if(packet_len == 0)
{
mp_msg(MSGT_DEMUX, MSGL_DBG2, "pes_parse2(,PACKET_LEN = 0, EXIT\n");
return 0;
}
if(packet_len > 184)
{
mp_msg(MSGT_DEMUX, MSGL_DBG2, "pes_parse2, BUFFER LEN IS TOO BIG: %d, EXIT\n", packet_len);
return 0;
}
p = buf;
pkt_len = packet_len;
mp_msg(MSGT_DEMUX, MSGL_DBG2, "pes_parse2: HEADER %02x %02x %02x %02x\n", p[0], p[1], p[2], p[3]);
if (p[0] || p[1] || (p[2] != 1))
{
mp_msg(MSGT_DEMUX, MSGL_DBG2, "pes_parse2: error HEADER %02x %02x %02x (should be 0x000001) \n", p[0], p[1], p[2]);
return 0 ;
}
packet_len -= 6;
if(packet_len==0)
{
mp_msg(MSGT_DEMUX, MSGL_DBG2, "pes_parse2: packet too short: %d, exit\n", packet_len);
return 0;
}
es->payload_size = (p[4] << 8 | p[5]);
pes_is_aligned = (p[6] & 4);
stream_id = p[3];
if (p[7] & 0x80)
{ /* pts available */
pts = (int64_t)(p[9] & 0x0E) << 29 ;
pts |= p[10] << 22 ;
pts |= (p[11] & 0xFE) << 14 ;
pts |= p[12] << 7 ;
pts |= (p[13] & 0xFE) >> 1 ;
es->pts = pts / 90000.0f;
}
else
es->pts = 0.0f;
header_len = p[8];
if (header_len + 9 > pkt_len) //9 are the bytes read up to the header_length field
{
mp_msg(MSGT_DEMUX, MSGL_DBG2, "demux_ts: illegal value for PES_header_data_length (0x%02x)\n", header_len);
return 0;
}
p += header_len + 9;
packet_len -= header_len + 3;
/*
if(packet_len <= 0)
mp_msg(MSGT_DEMUX, MSGL_INFO, "\n\nNow: %d, prima: %d, ORIG: %d\n\n\n", packet_len, packet_len+3+header_len, pkt_len);
*/
if(es->payload_size)
es->payload_size -= header_len + 3;
if (stream_id == 0xbd)
{
mp_msg(MSGT_DEMUX, MSGL_DBG3, "pes_parse2: audio buf = %02X %02X %02X %02X %02X %02X %02X %02X, 80: %d\n",
p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[0] & 0x80);
/*
* we check the descriptor tag first because some stations
* do not include any of the A52 header info in their audio tracks
* these "raw" streams may begin with a byte that looks like a stream type.
*/
if(
(type_from_pmt == AUDIO_A52) || /* A52 - raw */
(p[0] == 0x0B && p[1] == 0x77) /* A52 - syncword */
)
{
mp_msg(MSGT_DEMUX, MSGL_DBG2, "A52 RAW OR SYNCWORD\n");
es->start = p;
es->size = packet_len;
es->type = AUDIO_A52;
es->payload_size -= packet_len;
return 1;
}
/* SPU SUBS */
else if(type_from_pmt == SPU_DVB ||
((p[0] == 0x20) && pes_is_aligned)) // && p[1] == 0x00))
{
es->start = p;
es->size = packet_len;
es->type = SPU_DVB;
es->payload_size -= packet_len;
return 1;
}
else if (pes_is_aligned && ((p[0] & 0xE0) == 0x20)) //SPU_DVD
{
//DVD SUBS
es->start = p+1;
es->size = packet_len-1;
es->type = SPU_DVD;
es->payload_size -= packet_len;
return 1;
}
else if ((p[0] & 0xF0) == 0x80)
{
mp_msg(MSGT_DEMUX, MSGL_DBG2, "A52 WITH HEADER\n");
es->start = p+4;
es->size = packet_len - 4;
es->type = AUDIO_A52;
es->payload_size -= packet_len;
return 1;
}
else if (pes_is_aligned && ((p[0]&0xf0) == 0xa0))
{
int pcm_offset;
for (pcm_offset=0; ++pcm_offset < packet_len-1 ; )
{
if (p[pcm_offset] == 0x01 && p[pcm_offset+1] == 0x80)
{ /* START */
pcm_offset += 2;
break;
}
}
es->start = p + pcm_offset;
es->size = packet_len - pcm_offset;
es->type = AUDIO_LPCM_BE;
es->payload_size -= packet_len;
return 1;
}
else
{
mp_msg(MSGT_DEMUX, MSGL_DBG2, "PES_PRIVATE1\n");
es->start = p;
es->size = packet_len;
es->type = PES_PRIVATE1;
es->payload_size -= packet_len;
return 1;
}
}
else if ((stream_id >= 0xbc) && ((stream_id & 0xf0) == 0xe0))
{
es->start = p;
es->size = packet_len;
if(type_from_pmt != UNKNOWN)
es->type = type_from_pmt;
else
es->type = VIDEO_MPEG2;
if(es->payload_size)
es->payload_size -= packet_len;
mp_msg(MSGT_DEMUX, MSGL_DBG2, "pes_parse2: M2V size %d\n", es->size);
return 1;
}
else if ((stream_id == 0xfa))
{
if(type_from_pmt != -1) //MP4 A/V
{
es->start = p;
es->size = packet_len;
es->type = type_from_pmt;
if(es->payload_size)
es->payload_size -= packet_len;
return 1;
}
}
else if ((stream_id & 0xe0) == 0xc0)
{
int profile = 0, srate = 0, channels = 0;
uint32_t hdr, l = 0;
hdr = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
if((hdr & 0xfff00000) == 0xfff00000)
{
// ADTS AAC shows with MPA layer 4 (00 in the layer bitstream)
l = 4 - ((hdr & 0x00060000) >> 17);
profile = ((hdr & 0x0000C000) >> 14);
srate = ((hdr & 0x00003c00) >> 10);
channels = ((hdr & 0x000001E0) >> 5);
}
mp_msg(MSGT_DEMUX, MSGL_DBG2, "\n\naudio header: %2X %2X %2X %2X\nLAYER: %d, PROFILE: %d, SRATE=%d, CHANNELS=%d\n\n", p[0], p[1], p[3], p[4], l, profile, srate, channels);
es->start = p;
es->size = packet_len;
//if((type_from_pmt == 0x0f) || (l == 4)) //see in parse_pmt()
if(l==4)
es->type = AUDIO_AAC;
else
es->type = AUDIO_MP2;
es->payload_size -= packet_len;
return 1;
}
else if (type_from_pmt != -1) //as a last resort here we trust the PMT, if present
{
es->start = p;
es->size = packet_len;
es->type = type_from_pmt;
es->payload_size -= packet_len;
return 1;
}
else
{
mp_msg(MSGT_DEMUX, MSGL_DBG2, "pes_parse2: unknown packet, id: %x\n", stream_id);
}
return 0;
}
static int ts_sync(stream_t *stream)
{
int c=0;
mp_msg(MSGT_DEMUX, MSGL_DBG2, "TS_SYNC \n");
while(((c=stream_read_char(stream)) != 0x47) && ! stream->eof);
if(c == 0x47)
return c;
else
return 0;
}
static void ts_dump_streams(ts_priv_t *priv)
{
int i;
for(i = 0; i < 3; i++)
{
if((priv->fifo[i].pack != NULL) && (priv->fifo[i].offset != 0))
{
resize_demux_packet(priv->fifo[i].pack, priv->fifo[i].offset);
ds_add_packet(priv->fifo[i].ds, priv->fifo[i].pack);
priv->fifo[i].offset = 0;
priv->fifo[i].pack = NULL;
}
}
}
static inline int32_t prog_idx_in_pat(ts_priv_t *priv, uint16_t progid)
{
int x;
if(priv->pat.progs == NULL)
return -1;
for(x = 0; x < priv->pat.progs_cnt; x++)
{
if(priv->pat.progs[x].id == progid)
return x;
}
return -1;
}
static inline int32_t prog_id_in_pat(ts_priv_t *priv, uint16_t pid)
{
int x;
if(priv->pat.progs == NULL)
return -1;
for(x = 0; x < priv->pat.progs_cnt; x++)
{
if(priv->pat.progs[x].pmt_pid == pid)
return priv->pat.progs[x].id;
}
return -1;
}
/*
DON'T REMOVE, I'LL NEED IT IN THE (NEAR) FUTURE)
static int check_crc32(uint32_t val, uint8_t *ptr, uint16_t len, uint8_t *vbase)
{
uint32_t tab_crc32, calc_crc32;
calc_crc32 = CalcCRC32(val, ptr, len);
tab_crc32 = (vbase[0] << 24) | (vbase[1] << 16) | (vbase[2] << 8) | vbase[3];
printf("CRC32, TAB: %x, CALC: %x, eq: %x\n", tab_crc32, calc_crc32, tab_crc32 == calc_crc32);
return (tab_crc32 == calc_crc32);
}
*/
static int parse_pat(ts_priv_t * priv, int is_start, unsigned char *buff, int size)
{
uint8_t skip, m = 0;
unsigned char *ptr;
unsigned char *base;
int entries, i, sections;
uint16_t progid;
//PRE-FILLING
if(! is_start)
{
if(priv->pat.buffer_len == 0) //a broken packet
{
return 0;
}
if(priv->pat.skip)
m = min(priv->pat.skip, size);
priv->pat.skip -= m;
if(m == size)
return -1; //keep on buffering
}
else //IS_START, replace the old content
{
priv->pat.buffer_len = 0;
skip = buff[0]+1;
m = min(skip, size);
priv->pat.skip = skip - m;
if(m == size)
return -1;
}
//FILLING
memcpy(&(priv->pat.buffer[priv->pat.buffer_len]), &buff[m], size - m);
priv->pat.buffer_len += size - m;
//PARSING
ptr = priv->pat.buffer;
priv->pat.table_id = ptr[0];
priv->pat.ssi = (ptr[1] >> 7) & 0x1;
priv->pat.curr_next = ptr[5] & 0x01;
priv->pat.ts_id = (ptr[3] << 8 ) | ptr[4];
priv->pat.version_number = (ptr[5] >> 1) & 0x1F;
priv->pat.section_length = ((ptr[1] & 0x03) << 8 ) | ptr[2];
priv->pat.section_number = ptr[6];
priv->pat.last_section_number = ptr[7];
if((! priv->pat.curr_next) || (priv->pat.table_id != 0)) // || (! priv->pat.ssi))
return 0;
//beginning of sections loop
sections = priv->pat.last_section_number - priv->pat.section_number + 1;
mp_msg(MSGT_DEMUX, MSGL_V, "PARSE_PAT, section %d of %d, TOTAL: %d\n", priv->pat.section_number, priv->pat.last_section_number, sections);
if(priv->pat.section_length + 3 > priv->pat.buffer_len)
{
mp_msg(MSGT_DEMUX, MSGL_V, "PARSE_PAT, section larger than buffer size: %d > %d, EXIT\n",
priv->pat.section_length, priv->pat.buffer_len - 3);
return -1; //KEEP ON FILLING THE TABLE
}
//check_crc32(0xFFFFFFFFL, ptr, priv->pat.buffer_len - 4, &ptr[priv->pat.buffer_len - 4]);
entries = (int) (priv->pat.section_length - 9) / 4; //entries per section
for(i=0; i < entries; i++)
{
int32_t idx;
base = &ptr[8 + i*4];
progid = (base[0] << 8) | base[1];
if((idx = prog_idx_in_pat(priv, progid)) == -1)
{
int sz = sizeof(struct pat_progs_t) * (priv->pat.progs_cnt+1);
priv->pat.progs = (struct pat_progs_t*) realloc(priv->pat.progs, sz);
if(priv->pat.progs == NULL)
{
mp_msg(MSGT_DEMUX, MSGL_ERR, "PARSE_PAT: COULDN'T REALLOC %d bytes, NEXT\n", sz);
break;
}
idx = priv->pat.progs_cnt;
priv->pat.progs_cnt++;
}
priv->pat.progs[idx].id = progid;
priv->pat.progs[idx].pmt_pid = ((base[2] & 0x1F) << 8) | base[3];
mp_msg(MSGT_DEMUX, MSGL_V, "PROG: %d (%d-th of %d), PMT: %d\n", priv->pat.progs[idx].id, i+1, entries, priv->pat.progs[idx].pmt_pid);
}
return 1;
}
static inline int32_t es_pid_in_pmt(pmt_t * pmt, uint16_t pid)
{
uint16_t i;
if(pmt == NULL)
return -1;
if(pmt->es == NULL)
return -1;
for(i = 0; i < pmt->es_cnt; i++)
{
if(pmt->es[i].pid == pid)
return (int32_t) i;
}
return -1;
}
static int parse_descriptors(struct pmt_es_t *es, uint8_t *ptr)
{
int j, descr_len, len;
j = 0;
len = es->descr_length;
while(len > 2)
{
descr_len = ptr[j+1];
mp_msg(MSGT_DEMUX, MSGL_DBG2, "...descr id: 0x%x, len=%d\n", ptr[j], descr_len);
if(descr_len > len)
{
mp_msg(MSGT_DEMUX, MSGL_DBG2, "INVALID DESCR LEN: %d vs %d max, EXIT LOOP\n", descr_len, len);
return -1;
}
if(ptr[j] == 0x6a) //A52 Descriptor
{
es->type = AUDIO_A52;
mp_msg(MSGT_DEMUX, MSGL_DBG2, "DVB A52 Descriptor\n");
}
else if(ptr[j] == 0x59) //Subtitling Descriptor
{
uint8_t subtype;
mp_msg(MSGT_DEMUX, MSGL_DBG2, "Subtitling Descriptor\n");
if(descr_len < 8)
{
mp_msg(MSGT_DEMUX, MSGL_DBG2, "Descriptor length too short for DVB Subtitle Descriptor: %d, SKIPPING\n", descr_len);
}
else
{
memcpy(es->lang, &ptr[j+2], 3);
es->lang[3] = 0;
subtype = ptr[j+5];
if(
(subtype >= 0x10 && subtype <= 0x13) ||
(subtype >= 0x20 && subtype <= 0x23)
)
{
es->type = SPU_DVB;
//page parameters: compo page 2 bytes, ancillary page 2 bytes
}
else
es->type = UNKNOWN;
}
}
else if(ptr[j] == 0x50) //Component Descriptor
{
mp_msg(MSGT_DEMUX, MSGL_DBG2, "Component Descriptor\n");
memcpy(es->lang, &ptr[j+5], 3);
es->lang[3] = 0;
}
else if(ptr[j] == 0xa) //Language Descriptor
{
memcpy(es->lang, &ptr[j+2], 3);
es->lang[3] = 0;
mp_msg(MSGT_DEMUX, MSGL_V, "Language Descriptor: %s\n", es->lang);
}
else if(ptr[j] == 0x5) //Registration Descriptor (looks like e fourCC :) )
{
mp_msg(MSGT_DEMUX, MSGL_DBG2, "Registration Descriptor\n");
if(descr_len < 4)
{
mp_msg(MSGT_DEMUX, MSGL_DBG2, "Registration Descriptor length too short: %d, SKIPPING\n", descr_len);
}
else
{
char *d;
memcpy(es->format_descriptor, &ptr[j+2], 4);
es->format_descriptor[4] = 0;
d = &ptr[j+2];
if(d[0] == 'A' && d[1] == 'C' && d[2] == '-' && d[3] == '3')
{
es->type = AUDIO_A52;
}
else
es->type = UNKNOWN;
mp_msg(MSGT_DEMUX, MSGL_DBG2, "FORMAT %s\n", es->format_descriptor);
}
}
else
mp_msg(MSGT_DEMUX, MSGL_DBG2, "Unknown descriptor 0x%x, SKIPPING\n", ptr[j]);
len -= 2 + descr_len;
j += 2 + descr_len;
}
return 1;
}
static int parse_pmt(ts_priv_t * priv, uint16_t progid, uint16_t pid, int is_start, unsigned char *buff, int size)
{
unsigned char *base, *es_base;
pmt_t *pmt;
int32_t idx, es_count, section_bytes;
uint8_t skip, m=0;
idx = progid_idx_in_pmt(priv, progid);
if(idx == -1)
{
int sz = (priv->pmt_cnt + 1) * sizeof(pmt_t);
priv->pmt = (pmt_t *) realloc(priv->pmt, sz);
if(priv->pmt == NULL)
{
mp_msg(MSGT_DEMUX, MSGL_ERR, "PARSE_PMT: COULDN'T REALLOC %d bytes, NEXT\n", sz);
return 0;
}
idx = priv->pmt_cnt;
memset(&(priv->pmt[idx]), 0, sizeof(pmt_t));
priv->pmt_cnt++;
}
pmt = &(priv->pmt[idx]);
if(! is_start)
{
if(pmt->buffer_len == 0)
{
//BROKEN PMT PACKET, DISCARD
return -1;
}
if(pmt->skip)
m = min(pmt->skip, size);
pmt->skip -= m;
if(m == size)
return 0;
}
else
{
pmt->buffer_len = 0;
skip = buff[0] + 1;
m = min(skip, size);
pmt->skip = skip - m;
if(m == size)
return 0;
}
if(size-m + pmt->buffer_len > 2048)
{
mp_msg(MSGT_DEMUX, MSGL_V, "FILL_PMT(prog=%d, PID=%d), ERROR! PMT TOO LONG, IGNORING\n", progid, pid);
pmt->buffer_len = 0;
return 0;
}
memcpy(&(pmt->buffer[pmt->buffer_len]), &buff[m], size - m);
pmt->progid = progid;
pmt->buffer_len += size - m;
mp_msg(MSGT_DEMUX, MSGL_V, "FILL_PMT(prog=%d), PMT_len: %d, IS_START: %d, TS_PID: %d, SIZE=%d, M=%d, ES_CNT=%d, IDX=%d, PMT_PTR=%p\n",
progid, pmt->buffer_len, is_start, pid, size, m, pmt->es_cnt, idx, pmt);
base = pmt->buffer;
pmt->table_id = base[0];
pmt->ssi = base[1] & 0x80;
pmt->section_length = (((base[1] & 0xf) << 8 ) | base[2]);
pmt->version_number = (base[5] >> 1) & 0x1f;
pmt->curr_next = (base[5] & 1);
pmt->section_number = base[6];
pmt->last_section_number = base[7];
pmt->PCR_PID = ((base[8] & 0x1f) << 8 ) | base[9];
pmt->prog_descr_length = ((base[10] & 0xf) << 8 ) | base[11];
if((pmt->curr_next == 0) || (pmt->table_id != 2))
return -1;
if(pmt->section_length + 3 > pmt->buffer_len)
{
mp_msg(MSGT_DEMUX, MSGL_V, "PARSE_PMT, SECTION LENGTH TOO LARGE FOR CURRENT BUFFER (%d vs %d), NEXT TIME\n", pmt->section_length, pmt->buffer_len);
return -1;
}
if(pmt->prog_descr_length > pmt->section_length - 9)
{
mp_msg(MSGT_DEMUX, MSGL_V, "PARSE_PMT, INVALID PROG_DESCR LENGTH (%d vs %d)\n", pmt->prog_descr_length, pmt->section_length - 9);
return -1;
}
es_base = &base[12 + pmt->prog_descr_length]; //the beginning of th ES loop
section_bytes= pmt->section_length - 13 - pmt->prog_descr_length;
es_count = 0;
while(section_bytes >= 5)
{
int es_pid, es_type;
es_type = es_base[0];
es_pid = ((es_base[1] & 0x1f) << 8) | es_base[2];
idx = es_pid_in_pmt(pmt, es_pid);
if(idx == -1)
{
int sz = sizeof(struct pmt_es_t) * (pmt->es_cnt + 1);
pmt->es = (struct pmt_es_t *) realloc(pmt->es, sz);
if(pmt->es == NULL)
{
mp_msg(MSGT_DEMUX, MSGL_ERR, "PARSE_PMT, COULDN'T ALLOCATE %d bytes for PMT_ES\n", sz);
continue;
}
idx = pmt->es_cnt;
memset(&(pmt->es[idx]), 0, sizeof(struct pmt_es_t));
pmt->es_cnt++;
}
pmt->es[idx].descr_length = ((es_base[3] & 0xf) << 8) | es_base[4];
if(pmt->es[idx].descr_length > section_bytes - 5)
{
mp_msg(MSGT_DEMUX, MSGL_V, "PARSE_PMT, ES_DESCR_LENGTH TOO LARGE %d > %d, EXIT\n",
pmt->es[idx].descr_length, section_bytes - 5);
return -1;
}
pmt->es[idx].pid = es_pid;
pmt->es[idx].type = es_type;
pmt->es[idx].type = UNKNOWN;
switch(es_type)
{
case 1:
pmt->es[idx].type = VIDEO_MPEG1;
break;
case 2:
pmt->es[idx].type = VIDEO_MPEG2;
break;
case 3:
case 4:
parse_descriptors(&pmt->es[idx], &es_base[5]);
pmt->es[idx].type = AUDIO_MP2;
break;
case 6:
parse_descriptors(&pmt->es[idx], &es_base[5]);
if(pmt->es[idx].type == 0x6)
pmt->es[idx].type = UNKNOWN;
break;
case 0x10:
pmt->es[idx].type = VIDEO_MPEG4;
break;
case 0x11:
parse_descriptors(&pmt->es[idx], &es_base[5]);
pmt->es[idx].type = AUDIO_AAC;
break;
/* seems to indicate an AAC in a certain broadcaster's tables, but
it's deceiving, so it's commented out
case 0x0f:
parse_descriptors(&pmt->es[idx], &es_base[5]);
pmt->es[idx].type = 0x0f;
break;
*/
case 0x81:
pmt->es[idx].type = AUDIO_A52;
break;
default:
{
if(es_type > 0x80)
{
parse_descriptors(&pmt->es[idx], &es_base[5]);
}
else
{
mp_msg(MSGT_DEMUX, MSGL_DBG2, "UNKNOWN ES TYPE=0x%x\n", es_type);
pmt->es[idx].type = UNKNOWN;
}
}
}
section_bytes -= 5 + pmt->es[idx].descr_length;
mp_msg(MSGT_DEMUX, MSGL_V, "PARSE_PMT(%d INDEX %d), STREAM: %d, FOUND pid=0x%x (%d), type=0x%x, ES_DESCR_LENGTH: %d, bytes left: %d\n",
progid, idx, es_count, pmt->es[idx].pid, pmt->es[idx].pid, pmt->es[idx].type, pmt->es[idx].descr_length, section_bytes);
es_base += 5 + pmt->es[idx].descr_length;
es_count++;
}
mp_msg(MSGT_DEMUX, MSGL_V, "----------------------------\n");
return 1;
}
static inline int32_t pid_type_from_pmt(ts_priv_t *priv, int pid)
{
int32_t pmt_idx, pid_idx, i, j;
pmt_idx = progid_idx_in_pmt(priv, priv->prog);
if(pmt_idx != -1)
{
pid_idx = es_pid_in_pmt(&(priv->pmt[pmt_idx]), pid);
if(pid_idx != -1)
return priv->pmt[pmt_idx].es[pid_idx].type;
}
//else
//{
for(i = 0; i < priv->pmt_cnt; i++)
{
pmt_t *pmt = &(priv->pmt[i]);
for(j = 0; j < pmt->es_cnt; j++)
if(pmt->es[j].pid == pid)
return pmt->es[j].type;
}
//}
return UNKNOWN;
}
static inline uint8_t *pid_lang_from_pmt(ts_priv_t *priv, int pid)
{
int32_t pmt_idx, pid_idx, i, j;
pmt_idx = progid_idx_in_pmt(priv, priv->prog);
if(pmt_idx != -1)
{
pid_idx = es_pid_in_pmt(&(priv->pmt[pmt_idx]), pid);
if(pid_idx != -1)
return priv->pmt[pmt_idx].es[pid_idx].lang;
}
else
{
for(i = 0; i < priv->pmt_cnt; i++)
{
pmt_t *pmt = &(priv->pmt[i]);
for(j = 0; j < pmt->es_cnt; j++)
if(pmt->es[j].pid == pid)
return pmt->es[j].lang;
}
}
return NULL;
}
static int fill_packet(demuxer_t *demuxer, demux_stream_t *ds, demux_packet_t **dp, int *dp_offset)
{
int ret = 0;
if((*dp != NULL) && (*dp_offset > 0))
{
ret = *dp_offset;
resize_demux_packet(*dp, ret); //shrinked to the right size
ds_add_packet(ds, *dp);
mp_msg(MSGT_DEMUX, MSGL_DBG2, "ADDED %d bytes to %s fifo, PTS=%f\n", ret, (ds == demuxer->audio ? "audio" : (ds == demuxer->video ? "video" : "sub")), (*dp)->pts);
}
*dp = NULL;
*dp_offset = 0;
return ret;
}
// 0 = EOF or no stream found
// else = [-] number of bytes written to the packet
static int ts_parse(demuxer_t *demuxer , ES_stream_t *es, unsigned char *packet, int probe)
{
ES_stream_t *tss;
uint8_t done = 0;
int buf_size, is_start, pid, base;
int len, cc, cc_ok, afc, retv = 0, is_video, is_audio, is_sub;
ts_priv_t * priv = (ts_priv_t*) demuxer->priv;
stream_t *stream = demuxer->stream;
char *p, tmp[TS_FEC_PACKET_SIZE];
demux_stream_t *ds = NULL;
demux_packet_t **dp = NULL;
int *dp_offset = 0, *buffer_size = 0;
int32_t progid, pid_type, bad, ts_error;
while(! done)
{
bad = ts_error = 0;
ds = (demux_stream_t*) NULL;
dp = (demux_packet_t **) NULL;
dp_offset = buffer_size = NULL;
buf_size = priv->ts.packet_size;
if(stream_eof(stream))
{
if(! probe)
{
ts_dump_streams(priv);
demuxer->filepos = stream_tell(demuxer->stream);
}
return 0;
}
if(! ts_sync(stream))
{
mp_msg(MSGT_DEMUX, MSGL_INFO, "TS_PARSE: COULDN'T SYNC\n");
return 0;
}
len = stream_read(stream, &packet[1], 3);
if (len != 3)
return 0;
if((packet[1] >> 7) & 0x01) //transport error
ts_error = 1;
buf_size -= 4;
is_start = packet[1] & 0x40;
pid = ((packet[1] & 0x1f) << 8) | packet[2];
tss = priv->ts.pids[pid]; //an ES stream
if(tss == NULL)
{
tss = malloc(sizeof(ES_stream_t));
if(! tss)
continue;
memset(tss, 0, sizeof(ES_stream_t));
tss->pid = pid;
tss->last_cc = -1;
tss->type = UNKNOWN;
tss->payload_size = 0;
tss->seen = 0;
priv->ts.pids[pid] = tss;
}
if(((pid > 1) && (pid < 16)) || (pid == 8191)) //invalid pid
{
stream_skip(stream, buf_size-1);
continue;
}
cc = (packet[3] & 0xf);
cc_ok = (tss->last_cc < 0) || ((((tss->last_cc + 1) & 0x0f) == cc));
tss->last_cc = cc;
bad = ts_error || (! cc_ok);
if(! bad)
{
// skip adaptation field, but only if cc_ok is not corrupt,
//otherwise we may throw away good data
afc = (packet[3] >> 4) & 3;
if(! (afc % 2)) //no payload in this TS packet
{
stream_skip(stream, buf_size-1);
continue;
}
if(afc == 3)
{
int c;
c = stream_read_char(stream);
buf_size--;
c = min(c, buf_size);
stream_skip(stream, c);
buf_size -= c;
if(buf_size == 0)
continue;
afc = c + 1;
}
else
afc = 0; //payload only
}
else
{
// logically this packet should be dropped, but if I do it
// certain streams play corrupted. Maybe the decoders know
// how to deal with it, but at least I consider the packet
// as "not initial"
mp_msg(MSGT_DEMUX, MSGL_V, "ts_parse: PID=%d, Transport error: %d, CC_OK: %s\n\n", tss->pid, ts_error, (cc_ok ? "yes" : "no"));
if(priv->keep_broken == 0)
{
stream_skip(stream, buf_size-1);
continue;
}
is_start = 0; //queued to the packet data
}
tss->seen++;
if(tss->seen == 16 && cc_ok) //at least a complete round
mp_msg(MSGT_DEMUX, MSGL_V, "\nNew TS pid=%u\n", pid);
//TABLE PARSING
base = priv->ts.packet_size - buf_size;
if(pid == 0)
{
stream_read(stream,&packet[base], buf_size);
parse_pat(priv, is_start, &packet[base], buf_size);
continue;
}
else
{
progid = prog_id_in_pat(priv, pid);
if(progid != -1)
{
if(pid != demuxer->video->id && pid != demuxer->audio->id && pid != demuxer->sub->id)
{
stream_read(stream,&packet[base], buf_size);
parse_pmt(priv, progid, pid, is_start, &packet[base], buf_size);
continue;
}
else
mp_msg(MSGT_DEMUX, MSGL_ERR, "Argh! Data pid %d used in the PMT, Skipping PMT parsing!\n", pid);
}
}
priv->last_pid = pid;
is_video = ((tss->type == VIDEO_MPEG1) || (tss->type == VIDEO_MPEG2) || (tss->type == VIDEO_MPEG4));
is_audio = ((tss->type == AUDIO_MP2) || (tss->type == AUDIO_A52) || (tss->type == AUDIO_LPCM_BE) || (tss->type == AUDIO_AAC)
|| (tss->type == PES_PRIVATE1));
is_sub = ((tss->type == SPU_DVD) || (tss->type == SPU_DVB));
pid_type = pid_type_from_pmt(priv, pid);
// PES CONTENT STARTS HERE
if(! probe)
{
if((pid == demuxer->sub->id)) //or the lang is right
{
pid_type = SPU_DVD;
}
if(is_video && (demuxer->video->id == tss->pid))
{
ds = demuxer->video;
dp = &priv->fifo[1].pack;
dp_offset = &priv->fifo[1].offset;
buffer_size = &priv->fifo[1].buffer_size;
}
else if(is_audio && (demuxer->audio->id == tss->pid))
{
ds = demuxer->audio;
dp = &priv->fifo[0].pack;
dp_offset = &priv->fifo[0].offset;
buffer_size = &priv->fifo[0].buffer_size;
}
else if(is_sub
|| (pid_type == SPU_DVD) || (pid_type == SPU_DVB))
{
//SUBS are infrequent, so the initial detection may fail
// and we may need to add them at play-time
if(demuxer->sub->id == -1)
{
uint16_t p;
p = progid_for_pid(priv, tss->pid, priv->prog);
if(p == priv->prog)
{
int asgn = 0;
uint8_t *lang;
if(!strcmp(dvdsub_lang, ""))
asgn = 1;
else
{
lang = pid_lang_from_pmt(priv, pid);
if(lang != NULL)
asgn = (strncmp(lang, dvdsub_lang, 3) == 0);
else
asgn = 0;
}
if(asgn)
{
demuxer->sub->id = tss->pid;
mp_msg(MSGT_DEMUX, MSGL_INFO, "CHOSEN SUBs pid 0x%x (%d) FROM PROG %d\n", tss->pid, tss->pid, priv->prog);
}
}
else
{
mp_msg(MSGT_DEMUX, MSGL_V, "DISCARDED SUBs pid 0x%x (%d) NOT CHOSEN OR NOT IN PROG %d\n", tss->pid, tss->pid, priv->prog);
}
}
if(demuxer->sub->id == tss->pid)
{
ds = demuxer->sub;
dp = &priv->fifo[2].pack;
dp_offset = &priv->fifo[2].offset;
buffer_size = &priv->fifo[2].buffer_size;
}
else
{
stream_skip(stream, buf_size);
continue;
}
}
else
{
stream_skip(stream, buf_size);
continue;
}
//IS IT TIME TO QUEUE DATA to the dp_packet?
if(is_start && (dp != NULL))
{
retv = fill_packet(demuxer, ds, dp, dp_offset);
}
if(*dp == NULL)
{
*dp = new_demux_packet(*buffer_size); //es->size
*dp_offset = 0;
if(! *dp)
{
fprintf(stderr, "fill_buffer, NEW_ADD_PACKET(%d)FAILED\n", *buffer_size);
continue;
}
mp_msg(MSGT_DEMUX, MSGL_DBG2, "CREATED DP(%d)\n", *buffer_size);
}
mp_msg(MSGT_DEMUX, MSGL_DBG2, "NOW PACKET_SIZE = %d, DP_OFFSET = %d\n", *buffer_size, *dp_offset);
}
if(is_start)
{
mp_msg(MSGT_DEMUX, MSGL_DBG2, "IS_START\n");
p = &packet[base];
stream_read(stream, p, buf_size);
len = pes_parse2(p, buf_size, es, pid_type);
es->pid = tss->pid;
if(probe)
{
if(es->type == UNKNOWN)
return 0;
if(len == 0)
{
if(tss->type != UNKNOWN)
{
es->size = buf_size;
es->start = p;
return 1;
}
}
else
{
tss->type = es->type;
return 1;
}
}
else
{
if(len == 0)
{
if(tss->type != UNKNOWN)
{
len = es->size = buf_size; //push the whole packet to the fifo
//(we already learned what it is during the probe phase)
es->start = p;
}
else
continue;
}
if((es->pts < tss->last_pts) && es->pts)
mp_msg(MSGT_DEMUX, MSGL_DBG2, "BACKWARDS PTS! : NEW: %f -> LAST: %f, PID %d\n", es->pts, tss->last_pts, tss->pid);
if(es->pts == 0.0f)
es->pts = tss->pts = tss->last_pts;
else
tss->pts = tss->last_pts = es->pts;
mp_msg(MSGT_DEMUX, MSGL_DBG2, "ts_parse, NEW pid=%d, PSIZE: %u, type=%X, start=%p, len=%d\n",
es->pid, es->payload_size, es->type, es->start, es->size);
tss->payload_size = es->payload_size;
demuxer->filepos = stream_tell(demuxer->stream) - es->size;
if(*dp_offset + es->size > *buffer_size)
{
*buffer_size = *dp_offset + es->size + TS_FEC_PACKET_SIZE;
resize_demux_packet(*dp, *buffer_size);
//we'll skip at least one RESIZE() in the next iteration of ts_parse()
mp_msg(MSGT_DEMUX, MSGL_DBG2, "RESIZE DP TO %d\n", *buffer_size);
}
memcpy(&((*dp)->buffer[*dp_offset]), es->start, es->size);
*dp_offset += es->size;
(*dp)->flags = 0;
(*dp)->pos = stream_tell(demuxer->stream);
(*dp)->pts = es->pts;
if(is_audio)
{
retv = fill_packet(demuxer, ds, dp, dp_offset);
return 1;
}
if(retv > 0)
return retv;
else
continue;
}
}
else
{
uint16_t sz;
if(tss->type == UNKNOWN)
{
stream_skip(stream, buf_size);
if(probe)
return 0;
else
continue;
}
es->pid = tss->pid;
es->type = tss->type;
es->pts = tss->pts = tss->last_pts;
es->start = &packet[base];
if(tss->payload_size > 0)
{
sz = min(tss->payload_size, buf_size);
tss->payload_size -= sz;
es->size = sz;
}
else
{
if(is_video)
{
sz = es->size = buf_size;
}
else
{
stream_skip(stream, buf_size);
continue;
}
}
if(! probe)
{
if(*dp_offset + sz > *buffer_size)
{
*buffer_size = *dp_offset + sz + TS_FEC_PACKET_SIZE;
resize_demux_packet(*dp, *buffer_size);
//we'll skip at least one RESIZE() in the next iteration of ts_parse()
mp_msg(MSGT_DEMUX, MSGL_DBG2, "RESIZE DP TO %d\n", *buffer_size);
//mp_msg(MSGT_DEMUX, MSGL_INFO, "SECOND TYPE=%x, bytes=%d, afc=%d, psize=%d, tell=%llu\n", es->type, sz, afc, tss->payload_size, (uint64_t) stream_tell(demuxer->stream));
}
stream_read(stream, &((*dp)->buffer[*dp_offset]), sz);
*dp_offset += sz;
if(buf_size - sz > 0)
{
stream_skip(stream, buf_size - sz);
}
if(is_audio)
{
(*dp)->pts = tss->last_pts;
retv = fill_packet(demuxer, ds, dp, dp_offset);
return 1;
}
continue;
}
else
{
stream_read(stream, es->start, sz);
if(buf_size - sz) stream_skip(stream, buf_size-sz);
if(es->size)
return es->size;
else
continue;
}
}
}
return 0;
}
extern void resync_audio_stream(sh_audio_t *sh_audio);
extern void skip_audio_frame(sh_audio_t *sh_audio);
static void reset_fifos(ts_priv_t* priv, int a, int v, int s)
{
if(a)
{
if(priv->fifo[0].pack != NULL)
{
free_demux_packet(priv->fifo[0].pack);
priv->fifo[0].pack = NULL;
}
priv->fifo[0].offset = 0;
}
if(v)
{
if(priv->fifo[1].pack != NULL)
{
free_demux_packet(priv->fifo[1].pack);
priv->fifo[1].pack = NULL;
}
priv->fifo[1].offset = 0;
}
if(s)
{
if(priv->fifo[2].pack != NULL)
{
free_demux_packet(priv->fifo[2].pack);
priv->fifo[2].pack = NULL;
}
priv->fifo[2].offset = 0;
}
}
extern int videobuf_code_len;
extern int sync_video_packet(demux_stream_t *);
extern int skip_video_packet(demux_stream_t *);
void demux_seek_ts(demuxer_t *demuxer, float rel_seek_secs, int flags)
{
demux_stream_t *d_audio=demuxer->audio;
demux_stream_t *d_video=demuxer->video;
demux_stream_t *d_sub=demuxer->sub;
sh_audio_t *sh_audio=d_audio->sh;
sh_video_t *sh_video=d_video->sh;
ts_priv_t * priv = (ts_priv_t*) demuxer->priv;
int i, video_stats;
off_t newpos;
//================= seek in MPEG-TS ==========================
ts_dump_streams(demuxer->priv);
reset_fifos(priv, sh_audio != NULL, sh_video != NULL, demuxer->sub->id > 0);
if(sh_audio != NULL)
ds_free_packs(d_audio);
if(sh_video != NULL)
ds_free_packs(d_video);
if(demuxer->sub->id > 0)
ds_free_packs(d_sub);
video_stats = (sh_video != NULL);
if(video_stats)
video_stats = sh_video->i_bps;
newpos = (flags & 1) ? demuxer->movi_start : demuxer->filepos;
if(flags & 2) // float seek 0..1
newpos+=(demuxer->movi_end-demuxer->movi_start)*rel_seek_secs;
else
{
// time seek (secs)
if(! video_stats) // unspecified or VBR
newpos += 2324*75*rel_seek_secs; // 174.3 kbyte/sec
else
newpos += video_stats*rel_seek_secs;
}
if(newpos < demuxer->movi_start)
newpos = demuxer->movi_start; //begininng of stream
#ifdef _LARGEFILE_SOURCE
newpos &= ~((long long) (STREAM_BUFFER_SIZE - 1)); /* sector boundary */
#else
newpos &= ~(STREAM_BUFFER_SIZE - 1); /* sector boundary */
#endif
stream_seek(demuxer->stream, newpos);
videobuf_code_len = 0;
if(sh_video != NULL)
ds_fill_buffer(d_video);
if(sh_audio != NULL)
{
ds_fill_buffer(d_audio);
resync_audio_stream(sh_audio);
}
while(sh_video != NULL)
{
if(sh_audio && !d_audio->eof && d_video->pts && d_audio->pts)
{
float a_pts=d_audio->pts;
a_pts+=(ds_tell_pts(d_audio)-sh_audio->a_in_buffer_len)/(float)sh_audio->i_bps;
if(d_video->pts > a_pts)
{
skip_audio_frame(sh_audio); // sync audio
continue;
}
}
i = sync_video_packet(d_video);
if((sh_video->format == VIDEO_MPEG1) || (sh_video->format == VIDEO_MPEG2))
{
if(i==0x1B3 || i==0x1B8) break; // found it!
}
else //MPEG4
{
if(i==0x1B6) break; // found it!
}
if(!i || !skip_video_packet(d_video)) break; // EOF?
}
}
int demux_ts_fill_buffer(demuxer_t * demuxer)
{
ES_stream_t es;
char packet[TS_FEC_PACKET_SIZE];
return -ts_parse(demuxer, &es, packet, 0);
}
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