/*
- * MPEG2 transport stream (aka DVB) demux
- * Copyright (c) 2002-2003 Fabrice Bellard.
+ * MPEG2 transport stream (aka DVB) demuxer
+ * Copyright (c) 2002-2003 Fabrice Bellard
*
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include "avformat.h"
-
-#include "mpegts.h"
-//#define DEBUG_SI
+//#define DEBUG
//#define DEBUG_SEEK
+//#define USE_SYNCPOINT_SEARCH
-/* 1.0 second at 24Mbit/s */
-#define MAX_SCAN_PACKETS 32000
+#include "libavutil/crc.h"
+#include "libavutil/intreadwrite.h"
+#include "libavcodec/bytestream.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 4096
+#define MAX_RESYNC_SIZE 65536
-static int add_pes_stream(MpegTSContext *ts, int pid, int stream_type);
+#define MAX_PES_PAYLOAD 200*1024
enum MpegTSFilterType {
MPEGTS_PES,
MPEGTS_SECTION,
};
-typedef void PESCallback(void *opaque, const uint8_t *buf, int len, int is_start);
+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(void *opaque, const uint8_t *buf, int len);
+typedef void SectionCallback(MpegTSFilter *f, const uint8_t *buf, int len);
typedef void SetServiceCallback(void *opaque, int ret);
int section_index;
int section_h_size;
uint8_t *section_buf;
- int check_crc:1;
- int end_of_section_reached:1;
+ unsigned int check_crc:1;
+ unsigned int end_of_section_reached:1;
SectionCallback *section_cb;
void *opaque;
} MpegTSSectionFilter;
-typedef struct MpegTSFilter {
+struct MpegTSFilter {
int pid;
int last_cc; /* last cc code (-1 if first packet) */
enum MpegTSFilterType type;
MpegTSPESFilter pes_filter;
MpegTSSectionFilter section_filter;
} u;
-} MpegTSFilter;
+};
-typedef struct MpegTSService {
- int running:1;
- int sid;
- char *provider_name;
- char *name;
-} MpegTSService;
+#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];
+};
struct MpegTSContext {
/* user data */
AVFormatContext *stream;
- int raw_packet_size; /* raw packet size, including FEC if present */
- int auto_guess; /* if true, all pids are analized to find streams */
- int set_service_ret;
-
- int mpeg2ts_raw; /* force raw MPEG2 transport stream output, if possible */
- int mpeg2ts_compute_pcr; /* compute exact PCR for each transport stream packet */
-
- /* used to estimate the exact PCR */
- int64_t cur_pcr;
- int pcr_incr;
- int pcr_pid;
-
+ /** 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 */
+
/* data needed to handle file based ts */
- int stop_parse; /* stop parsing loop */
- AVPacket *pkt; /* packet containing av data */
+ /** stop parsing loop */
+ int stop_parse;
+ /** packet containing Audio/Video data */
+ AVPacket *pkt;
+ /** to detect seek */
+ int64_t last_pos;
/******************************************/
/* private mpegts data */
/* scan context */
- MpegTSFilter *sdt_filter;
- int nb_services;
- MpegTSService **services;
-
- /* set service context (XXX: allocated it ?) */
- SetServiceCallback *set_service_cb;
- void *set_service_opaque;
- MpegTSFilter *pat_filter;
- MpegTSFilter *pmt_filter;
- int req_sid;
+ /** structure to keep track of Program->pids mapping */
+ unsigned int nb_prg;
+ struct Program *prg;
+
+ /** filters for various streams specified by PMT + for the PAT and PMT */
MpegTSFilter *pids[NB_PID_MAX];
};
+/* 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 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;
+} PESContext;
+
+extern AVInputFormat ff_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)
+{
+ 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->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;
+}
+
+/**
+ * \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;
+}
+
+/**
+ * Assemble PES packets out of TS packets, and then call the "section_cb"
+ * function when they are complete.
+ */
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;
- unsigned int crc;
-
+
if (is_start) {
memcpy(tss->section_buf, buf, buf_size);
tss->section_index = buf_size;
/* compute section length if possible */
if (tss->section_h_size == -1 && tss->section_index >= 3) {
- len = (((tss->section_buf[1] & 0xf) << 8) | tss->section_buf[2]) + 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 (tss->check_crc) {
- crc = mpegts_crc32(tss->section_buf, tss->section_h_size);
- if (crc != 0)
- goto invalid_crc;
- }
- tss->section_cb(tss->opaque, tss->section_buf, tss->section_h_size);
- invalid_crc:
tss->end_of_section_reached = 1;
+ if (!tss->check_crc ||
+ av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1,
+ tss->section_buf, tss->section_h_size) == 0)
+ tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
}
}
-MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, unsigned int pid,
+static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, unsigned int pid,
SectionCallback *section_cb, void *opaque,
int check_crc)
{
MpegTSFilter *filter;
MpegTSSectionFilter *sec;
-
-#ifdef DEBUG_SI
- printf("Filter: pid=0x%x\n", pid);
-#endif
+
+ 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)
+ if (!filter)
return NULL;
ts->pids[pid] = filter;
filter->type = MPEGTS_SECTION;
return filter;
}
-MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
+static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
PESCallback *pes_cb,
void *opaque)
{
if (pid >= NB_PID_MAX || ts->pids[pid])
return NULL;
filter = av_mallocz(sizeof(MpegTSFilter));
- if (!filter)
+ if (!filter)
return NULL;
ts->pids[pid] = filter;
filter->type = MPEGTS_PES;
return filter;
}
-void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
+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_freep(&pes->buffer);
+ /* referenced private data will be freed later in
+ * av_close_input_stream */
+ 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[packet_size];
+ 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; i++){
- if(buf[i] == 0x47){
+ for(x=i=0; i<size-3; i++){
+ if(buf[i] == 0x47 && !(buf[i+1] & 0x80) && (buf[i+3] & 0x30)){
stat[x]++;
if(stat[x] > best_score){
best_score= stat[x];
/* autodetect fec presence. Must have at least 1024 bytes */
static int get_packet_size(const uint8_t *buf, int size)
{
- int score, fec_score;
+ 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, fec_score: %d \n", score, fec_score);
-
- if (score > fec_score) return TS_PACKET_SIZE;
- else if(score < fec_score) return TS_FEC_PACKET_SIZE;
+// 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;
}
p = *pp;
if ((p + 1) >= p_end)
return -1;
- c = (p[0] << 8) | p[1];
+ c = AV_RB16(p);
p += 2;
*pp = p;
return c;
return str;
}
-static int parse_section_header(SectionHeader *h,
+static int parse_section_header(SectionHeader *h,
const uint8_t **pp, const uint8_t *p_end)
{
int val;
return 0;
}
-static MpegTSService *new_service(MpegTSContext *ts, int sid,
- char *provider_name, char *name)
-{
- MpegTSService *service;
-
-#ifdef DEBUG_SI
- printf("new_service: sid=0x%04x provider='%s' name='%s'\n",
- sid, provider_name, name);
-#endif
-
- service = av_mallocz(sizeof(MpegTSService));
- if (!service)
- return NULL;
- service->sid = sid;
- service->provider_name = provider_name;
- service->name = name;
- dynarray_add(&ts->services, &ts->nb_services, service);
- return service;
-}
+typedef struct {
+ uint32_t stream_type;
+ enum AVMediaType codec_type;
+ enum CodecID codec_id;
+} StreamType;
+
+static const StreamType ISO_types[] = {
+ { 0x01, AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG2VIDEO },
+ { 0x02, AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG2VIDEO },
+ { 0x03, AVMEDIA_TYPE_AUDIO, CODEC_ID_MP3 },
+ { 0x04, AVMEDIA_TYPE_AUDIO, CODEC_ID_MP3 },
+ { 0x0f, AVMEDIA_TYPE_AUDIO, CODEC_ID_AAC },
+ { 0x10, AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG4 },
+ { 0x11, AVMEDIA_TYPE_AUDIO, CODEC_ID_AAC_LATM }, /* LATM syntax */
+ { 0x1b, AVMEDIA_TYPE_VIDEO, CODEC_ID_H264 },
+ { 0xd1, AVMEDIA_TYPE_VIDEO, CODEC_ID_DIRAC },
+ { 0xea, AVMEDIA_TYPE_VIDEO, CODEC_ID_VC1 },
+ { 0 },
+};
-static void pmt_cb(void *opaque, const uint8_t *section, int section_len)
-{
- MpegTSContext *ts = opaque;
- SectionHeader h1, *h = &h1;
- const uint8_t *p, *p_end;
- int program_info_length, pcr_pid, pid, stream_type, desc_length;
-
-#ifdef DEBUG_SI
- printf("PMT:\n");
- av_hex_dump((uint8_t *)section, section_len);
-#endif
- p_end = section + section_len - 4;
- p = section;
- if (parse_section_header(h, &p, p_end) < 0)
- return;
-#ifdef DEBUG_SI
- printf("sid=0x%x sec_num=%d/%d\n", h->id, h->sec_num, h->last_sec_num);
-#endif
- if (h->tid != PMT_TID || (ts->req_sid >= 0 && h->id != ts->req_sid) )
- return;
+static const StreamType HDMV_types[] = {
+ { 0x80, AVMEDIA_TYPE_AUDIO, CODEC_ID_PCM_BLURAY },
+ { 0x81, AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 },
+ { 0x82, AVMEDIA_TYPE_AUDIO, CODEC_ID_DTS },
+ { 0x83, AVMEDIA_TYPE_AUDIO, CODEC_ID_TRUEHD },
+ { 0x84, AVMEDIA_TYPE_AUDIO, CODEC_ID_EAC3 },
+ { 0x90, AVMEDIA_TYPE_SUBTITLE, CODEC_ID_HDMV_PGS_SUBTITLE },
+ { 0 },
+};
- pcr_pid = get16(&p, p_end) & 0x1fff;
- if (pcr_pid < 0)
- return;
- ts->pcr_pid = pcr_pid;
-#ifdef DEBUG_SI
- printf("pcr_pid=0x%x\n", pcr_pid);
-#endif
- program_info_length = get16(&p, p_end) & 0xfff;
- if (program_info_length < 0)
- return;
- p += program_info_length;
- if (p >= p_end)
- return;
- for(;;) {
- stream_type = get8(&p, p_end);
- if (stream_type < 0)
- break;
- pid = get16(&p, p_end) & 0x1fff;
- if (pid < 0)
- break;
- desc_length = get16(&p, p_end) & 0xfff;
- if (desc_length < 0)
- break;
- p += desc_length;
- if (p > p_end)
- return;
+/* ATSC ? */
+static const StreamType MISC_types[] = {
+ { 0x81, AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 },
+ { 0x8a, AVMEDIA_TYPE_AUDIO, CODEC_ID_DTS },
+ { 0 },
+};
-#ifdef DEBUG_SI
- printf("stream_type=%d pid=0x%x\n", stream_type, pid);
-#endif
+static const StreamType REGD_types[] = {
+ { MKTAG('d','r','a','c'), AVMEDIA_TYPE_VIDEO, CODEC_ID_DIRAC },
+ { MKTAG('A','C','-','3'), AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 },
+ { 0 },
+};
- /* now create ffmpeg stream */
- switch(stream_type) {
- case STREAM_TYPE_AUDIO_MPEG1:
- case STREAM_TYPE_AUDIO_MPEG2:
- case STREAM_TYPE_VIDEO_MPEG1:
- case STREAM_TYPE_VIDEO_MPEG2:
- case STREAM_TYPE_VIDEO_MPEG4:
- case STREAM_TYPE_VIDEO_H264:
- case STREAM_TYPE_AUDIO_AAC:
- case STREAM_TYPE_AUDIO_AC3:
- add_pes_stream(ts, pid, stream_type);
- break;
- default:
- /* we ignore the other streams */
- break;
- }
- }
- /* all parameters are there */
- ts->set_service_cb(ts->set_service_opaque, 0);
- mpegts_close_filter(ts, ts->pmt_filter);
- ts->pmt_filter = NULL;
-}
+/* descriptor present */
+static const StreamType DESC_types[] = {
+ { 0x6a, AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 }, /* AC-3 descriptor */
+ { 0x7a, AVMEDIA_TYPE_AUDIO, CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
+ { 0x7b, AVMEDIA_TYPE_AUDIO, CODEC_ID_DTS },
+ { 0x56, AVMEDIA_TYPE_SUBTITLE, CODEC_ID_DVB_TELETEXT },
+ { 0x59, AVMEDIA_TYPE_SUBTITLE, CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
+ { 0 },
+};
-static void pat_cb(void *opaque, const uint8_t *section, int section_len)
+static void mpegts_find_stream_type(AVStream *st,
+ uint32_t stream_type, const StreamType *types)
{
- MpegTSContext *ts = opaque;
- SectionHeader h1, *h = &h1;
- const uint8_t *p, *p_end;
- int sid, pmt_pid;
-
-#ifdef DEBUG_SI
- printf("PAT:\n");
- av_hex_dump((uint8_t *)section, section_len);
-#endif
- p_end = section + section_len - 4;
- p = section;
- if (parse_section_header(h, &p, p_end) < 0)
- return;
- if (h->tid != PAT_TID)
- return;
-
- for(;;) {
- sid = get16(&p, p_end);
- if (sid < 0)
- break;
- pmt_pid = get16(&p, p_end) & 0x1fff;
- if (pmt_pid < 0)
- break;
-#ifdef DEBUG_SI
- printf("sid=0x%x pid=0x%x\n", sid, pmt_pid);
-#endif
- if (sid == 0x0000) {
- /* NIT info */
- } else {
- if (ts->req_sid == sid) {
- ts->pmt_filter = mpegts_open_section_filter(ts, pmt_pid,
- pmt_cb, ts, 1);
- goto found;
- }
+ 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;
+ return;
}
}
- /* not found */
- ts->set_service_cb(ts->set_service_opaque, -1);
-
- found:
- mpegts_close_filter(ts, ts->pat_filter);
- ts->pat_filter = NULL;
}
-/* add all services found in the PAT */
-static void pat_scan_cb(void *opaque, const uint8_t *section, int section_len)
+static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
+ uint32_t stream_type, uint32_t prog_reg_desc)
{
- MpegTSContext *ts = opaque;
- SectionHeader h1, *h = &h1;
- const uint8_t *p, *p_end;
- int sid, pmt_pid;
- char *provider_name, *name;
- char buf[256];
-
-#ifdef DEBUG_SI
- printf("PAT:\n");
- av_hex_dump((uint8_t *)section, section_len);
-#endif
- p_end = section + section_len - 4;
- p = section;
- if (parse_section_header(h, &p, p_end) < 0)
- return;
- if (h->tid != PAT_TID)
- return;
+ av_set_pts_info(st, 33, 1, 90000);
+ st->priv_data = pes;
+ st->codec->codec_type = AVMEDIA_TYPE_DATA;
+ st->codec->codec_id = CODEC_ID_NONE;
+ st->need_parsing = AVSTREAM_PARSE_FULL;
+ pes->st = st;
+ pes->stream_type = stream_type;
- for(;;) {
- sid = get16(&p, p_end);
- if (sid < 0)
- break;
- pmt_pid = get16(&p, p_end) & 0x1fff;
- if (pmt_pid < 0)
- break;
-#ifdef DEBUG_SI
- printf("sid=0x%x pid=0x%x\n", sid, pmt_pid);
-#endif
- if (sid == 0x0000) {
- /* NIT info */
- } else {
- /* add the service with a dummy name */
- snprintf(buf, sizeof(buf), "Service %x\n", sid);
- name = av_strdup(buf);
- provider_name = av_strdup("");
- if (name && provider_name) {
- new_service(ts, sid, provider_name, name);
- } else {
- av_freep(&name);
- av_freep(&provider_name);
+ 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") &&
+ st->codec->codec_id == 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 = av_new_stream(pes->stream, pes->pid);
+ if (!sub_st) {
+ av_free(sub_pes);
+ return AVERROR(ENOMEM);
}
- }
- }
- ts->stop_parse = 1;
-
- /* remove filter */
- mpegts_close_filter(ts, ts->pat_filter);
- ts->pat_filter = NULL;
-}
-void mpegts_set_service(MpegTSContext *ts, int sid,
- SetServiceCallback *set_service_cb, void *opaque)
-{
- ts->set_service_cb = set_service_cb;
- ts->set_service_opaque = opaque;
- ts->req_sid = sid;
- ts->pat_filter = mpegts_open_section_filter(ts, PAT_PID,
- pat_cb, ts, 1);
-}
-
-static void sdt_cb(void *opaque, const uint8_t *section, int section_len)
-{
- MpegTSContext *ts = 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;
-
-#ifdef DEBUG_SI
- printf("SDT:\n");
- av_hex_dump((uint8_t *)section, section_len);
-#endif
-
- p_end = section + section_len - 4;
- p = section;
- if (parse_section_header(h, &p, p_end) < 0)
- return;
- if (h->tid != SDT_TID)
- return;
- onid = get16(&p, p_end);
- if (onid < 0)
- return;
- val = get8(&p, p_end);
- if (val < 0)
- return;
- for(;;) {
- sid = get16(&p, p_end);
- if (sid < 0)
- break;
- val = get8(&p, p_end);
- if (val < 0)
- break;
- desc_list_len = get16(&p, p_end) & 0xfff;
- if (desc_list_len < 0)
- break;
- desc_list_end = p + desc_list_len;
- if (desc_list_end > p_end)
- break;
- for(;;) {
- desc_tag = get8(&p, desc_list_end);
- if (desc_tag < 0)
- break;
- desc_len = get8(&p, desc_list_end);
- desc_end = p + desc_len;
- if (desc_end > desc_list_end)
- break;
-#ifdef DEBUG_SI
- printf("tag: 0x%02x len=%d\n", desc_tag, desc_len);
-#endif
- 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)
- break;
- new_service(ts, sid, provider_name, name);
- break;
- default:
- break;
- }
- p = desc_end;
+ av_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 = CODEC_ID_AC3;
+ sub_st->need_parsing = AVSTREAM_PARSE_FULL;
+ sub_pes->sub_st = pes->sub_st = sub_st;
}
- p = desc_list_end;
}
- ts->stop_parse = 1;
-
- /* remove filter */
- mpegts_close_filter(ts, ts->sdt_filter);
- ts->sdt_filter = NULL;
-}
+ if (st->codec->codec_id == CODEC_ID_NONE)
+ mpegts_find_stream_type(st, pes->stream_type, MISC_types);
-/* scan services in a transport stream by looking at the SDT */
-void mpegts_scan_sdt(MpegTSContext *ts)
-{
- ts->sdt_filter = mpegts_open_section_filter(ts, SDT_PID,
- sdt_cb, ts, 1);
+ return 0;
}
-/* scan services in a transport stream by looking at the PAT (better
- than nothing !) */
-void mpegts_scan_pat(MpegTSContext *ts)
+static void new_pes_packet(PESContext *pes, AVPacket *pkt)
{
- ts->pat_filter = mpegts_open_section_filter(ts, PAT_PID,
- pat_scan_cb, ts, 1);
-}
-
-/* TS stream handling */
-
-enum MpegTSState {
- MPEGTS_HEADER = 0,
- MPEGTS_PESHEADER_FILL,
- MPEGTS_PAYLOAD,
- MPEGTS_SKIP,
-};
-
-/* enough for PES header + length */
-#define PES_START_SIZE 9
-#define MAX_PES_HEADER_SIZE (9 + 255)
-
-typedef struct PESContext {
- int pid;
- int stream_type;
- MpegTSContext *ts;
- AVFormatContext *stream;
- AVStream *st;
- enum MpegTSState state;
- /* used to get the format */
- int data_index;
- int total_size;
- int pes_header_size;
- int64_t pts, dts;
- uint8_t header[MAX_PES_HEADER_SIZE];
-} PESContext;
+ av_init_packet(pkt);
-static int64_t get_pts(const uint8_t *p)
-{
- int64_t pts;
- int val;
+ pkt->destruct = av_destruct_packet;
+ pkt->data = pes->buffer;
+ pkt->size = pes->data_index;
+ memset(pkt->data+pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
- pts = (int64_t)((p[0] >> 1) & 0x07) << 30;
- val = (p[1] << 8) | p[2];
- pts |= (int64_t)(val >> 1) << 15;
- val = (p[3] << 8) | p[4];
- pts |= (int64_t)(val >> 1);
- return pts;
+ // 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;
+
+ /* reset pts values */
+ pes->pts = AV_NOPTS_VALUE;
+ pes->dts = AV_NOPTS_VALUE;
+ pes->buffer = NULL;
+ pes->data_index = 0;
}
/* return non zero if a packet could be constructed */
-static void mpegts_push_data(void *opaque,
- const uint8_t *buf, int buf_size, int is_start)
+static int mpegts_push_data(MpegTSFilter *filter,
+ const uint8_t *buf, int buf_size, int is_start,
+ int64_t pos)
{
- PESContext *pes = opaque;
+ PESContext *pes = filter->u.pes_filter.opaque;
MpegTSContext *ts = pes->ts;
- AVStream *st;
const uint8_t *p;
- int len, code, codec_type, codec_id;
-
+ int len, code;
+
+ if(!ts->pkt)
+ return 0;
+
if (is_start) {
+ if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
+ new_pes_packet(pes, ts->pkt);
+ ts->stop_parse = 1;
+ }
pes->state = MPEGTS_HEADER;
pes->data_index = 0;
+ pes->ts_packet_pos = pos;
}
p = buf;
while (buf_size > 0) {
/* we got all the PES or section header. We can now
decide */
#if 0
- av_hex_dump(pes->header, pes->data_index);
+ av_hex_dump_log(pes->stream, AV_LOG_DEBUG, pes->header, pes->data_index);
#endif
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;
- if (!((code >= 0x1c0 && code <= 0x1df) ||
- (code >= 0x1e0 && code <= 0x1ef) ||
- (code == 0x1bd)))
+ av_dlog(pes->stream, "pid=%x pes_code=%#x\n", pes->pid, code);
+
+ if ((pes->st && pes->st->discard == AVDISCARD_ALL) ||
+ code == 0x1be) /* padding_stream */
+ goto skip;
+
+#if FF_API_MAX_STREAMS
+ if (!pes->st && pes->stream->nb_streams == MAX_STREAMS)
goto skip;
+#endif
+
+ /* stream not present in PMT */
if (!pes->st) {
- /* allocate stream */
- switch(pes->stream_type){
- case STREAM_TYPE_AUDIO_MPEG1:
- case STREAM_TYPE_AUDIO_MPEG2:
- codec_type = CODEC_TYPE_AUDIO;
- codec_id = CODEC_ID_MP3;
- break;
- case STREAM_TYPE_VIDEO_MPEG1:
- case STREAM_TYPE_VIDEO_MPEG2:
- codec_type = CODEC_TYPE_VIDEO;
- codec_id = CODEC_ID_MPEG2VIDEO;
- break;
- case STREAM_TYPE_VIDEO_MPEG4:
- codec_type = CODEC_TYPE_VIDEO;
- codec_id = CODEC_ID_MPEG4;
- break;
- case STREAM_TYPE_VIDEO_H264:
- codec_type = CODEC_TYPE_VIDEO;
- codec_id = CODEC_ID_H264;
- break;
- case STREAM_TYPE_AUDIO_AAC:
- codec_type = CODEC_TYPE_AUDIO;
- codec_id = CODEC_ID_AAC;
- break;
- case STREAM_TYPE_AUDIO_AC3:
- codec_type = CODEC_TYPE_AUDIO;
- codec_id = CODEC_ID_AC3;
- break;
- default:
- if (code >= 0x1c0 && code <= 0x1df) {
- codec_type = CODEC_TYPE_AUDIO;
- codec_id = CODEC_ID_MP2;
- } else if (code == 0x1bd) {
- codec_type = CODEC_TYPE_AUDIO;
- codec_id = CODEC_ID_AC3;
- } else {
- codec_type = CODEC_TYPE_VIDEO;
- codec_id = CODEC_ID_MPEG1VIDEO;
- }
- break;
- }
- st = av_new_stream(pes->stream, pes->pid);
- if (st) {
- st->priv_data = pes;
- st->codec.codec_type = codec_type;
- st->codec.codec_id = codec_id;
- st->need_parsing = 1;
- pes->st = st;
- }
+ pes->st = av_new_stream(ts->stream, pes->pid);
+ if (!pes->st)
+ return AVERROR(ENOMEM);
+ mpegts_set_stream_info(pes->st, pes, 0, 0);
}
- pes->state = MPEGTS_PESHEADER_FILL;
- pes->total_size = (pes->header[4] << 8) | pes->header[5];
+
+ 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 += 6;
- pes->pes_header_size = pes->header[8] + 9;
+ if (!pes->total_size)
+ pes->total_size = MAX_PES_PAYLOAD;
+
+ /* allocate pes buffer */
+ pes->buffer = av_malloc(pes->total_size+FF_INPUT_BUFFER_PADDING_SIZE);
+ if (!pes->buffer)
+ return AVERROR(ENOMEM);
+
+ if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
+ code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
+ code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
+ code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
+ pes->state = MPEGTS_PESHEADER;
+ if (pes->st->codec->codec_id == CODEC_ID_NONE) {
+ av_dlog(pes->stream, "pid=%x stream_type=%x probing\n",
+ pes->pid, pes->stream_type);
+ pes->st->codec->codec_id = CODEC_ID_PROBE;
+ }
+ } else {
+ pes->state = MPEGTS_PAYLOAD;
+ pes->data_index = 0;
+ }
} else {
/* otherwise, it should be a table */
/* skip packet */
break;
/**********************************************/
/* PES packing parsing */
+ case MPEGTS_PESHEADER:
+ len = PES_HEADER_SIZE - pes->data_index;
+ if (len < 0)
+ return -1;
+ if (len > buf_size)
+ len = buf_size;
+ memcpy(pes->header + pes->data_index, p, len);
+ pes->data_index += len;
+ p += len;
+ buf_size -= len;
+ if (pes->data_index == PES_HEADER_SIZE) {
+ pes->pes_header_size = pes->header[8] + 9;
+ pes->state = MPEGTS_PESHEADER_FILL;
+ }
+ break;
case MPEGTS_PESHEADER_FILL:
len = pes->pes_header_size - pes->data_index;
+ if (len < 0)
+ return -1;
if (len > buf_size)
len = buf_size;
memcpy(pes->header + pes->data_index, p, len);
buf_size -= len;
if (pes->data_index == pes->pes_header_size) {
const uint8_t *r;
- unsigned int flags;
+ 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;
+ }
+ break;
+ case MPEGTS_PAYLOAD:
+ if (buf_size > 0 && 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_malloc(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+pes->data_index, p, buf_size);
+ pes->data_index += buf_size;
+ }
+ buf_size = 0;
+ /* emit complete packets with known packet size
+ * decreases demuxer delay for infrequent packets like subtitles from
+ * a couple of seconds to milliseconds for properly muxed files.
+ * total_size is the number of bytes following pes_packet_length
+ * in the pes header, i.e. not counting the first 6 bytes */
+ if (pes->total_size < MAX_PES_PAYLOAD &&
+ pes->pes_header_size + pes->data_index == pes->total_size + 6) {
+ ts->stop_parse = 1;
+ new_pes_packet(pes, ts->pkt);
+ }
+ 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;
+}
+
+static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
+ int *es_id, uint8_t **dec_config_descr,
+ int *dec_config_descr_size)
+{
+ AVIOContext pb;
+ int tag;
+ unsigned len;
+
+ ffio_init_context(&pb, buf, size, 0, NULL, NULL, NULL, NULL);
+
+ len = ff_mp4_read_descr(s, &pb, &tag);
+ if (tag == MP4IODescrTag) {
+ avio_rb16(&pb); // ID
+ avio_r8(&pb);
+ avio_r8(&pb);
+ avio_r8(&pb);
+ avio_r8(&pb);
+ avio_r8(&pb);
+ len = ff_mp4_read_descr(s, &pb, &tag);
+ if (tag == MP4ESDescrTag) {
+ *es_id = avio_rb16(&pb); /* ES_ID */
+ av_dlog(s, "ES_ID %#x\n", *es_id);
+ avio_r8(&pb); /* priority */
+ len = ff_mp4_read_descr(s, &pb, &tag);
+ if (tag == MP4DecConfigDescrTag) {
+ *dec_config_descr = av_malloc(len);
+ if (!*dec_config_descr)
+ return AVERROR(ENOMEM);
+ *dec_config_descr_size = len;
+ avio_read(&pb, *dec_config_descr, len);
+ }
+ }
+ }
+ return 0;
+}
+
+int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
+ const uint8_t **pp, const uint8_t *desc_list_end,
+ int mp4_dec_config_descr_len, int mp4_es_id, int pid,
+ uint8_t *mp4_dec_config_descr)
+{
+ const uint8_t *desc_end;
+ int desc_len, desc_tag;
+ char language[252];
+ int i;
+
+ desc_tag = get8(pp, desc_list_end);
+ if (desc_tag < 0)
+ return -1;
+ desc_len = get8(pp, desc_list_end);
+ if (desc_len < 0)
+ return -1;
+ desc_end = *pp + desc_len;
+ if (desc_end > desc_list_end)
+ return -1;
+
+ av_dlog(fc, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
+
+ if (st->codec->codec_id == CODEC_ID_NONE &&
+ stream_type == STREAM_TYPE_PRIVATE_DATA)
+ mpegts_find_stream_type(st, desc_tag, DESC_types);
+
+ switch(desc_tag) {
+ case 0x1F: /* FMC descriptor */
+ get16(pp, desc_end);
+ if (st->codec->codec_id == CODEC_ID_AAC_LATM &&
+ mp4_dec_config_descr_len && mp4_es_id == pid) {
+ AVIOContext pb;
+ ffio_init_context(&pb, mp4_dec_config_descr,
+ mp4_dec_config_descr_len, 0, NULL, NULL, NULL, NULL);
+ ff_mp4_read_dec_config_descr(fc, st, &pb);
+ if (st->codec->codec_id == CODEC_ID_AAC &&
+ st->codec->extradata_size > 0)
+ st->need_parsing = 0;
+ }
+ break;
+ case 0x56: /* DVB teletext descriptor */
+ language[0] = get8(pp, desc_end);
+ language[1] = get8(pp, desc_end);
+ language[2] = get8(pp, desc_end);
+ language[3] = 0;
+ av_metadata_set2(&st->metadata, "language", language, 0);
+ break;
+ case 0x59: /* subtitling descriptor */
+ language[0] = get8(pp, desc_end);
+ language[1] = get8(pp, desc_end);
+ language[2] = get8(pp, desc_end);
+ language[3] = 0;
+ /* hearing impaired subtitles detection */
+ switch(get8(pp, desc_end)) {
+ case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
+ case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
+ case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
+ case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
+ case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
+ case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
+ st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
+ break;
+ }
+ if (st->codec->extradata) {
+ if (st->codec->extradata_size == 4 && memcmp(st->codec->extradata, *pp, 4))
+ av_log_ask_for_sample(fc, "DVB sub with multiple IDs\n");
+ } else {
+ st->codec->extradata = av_malloc(4 + FF_INPUT_BUFFER_PADDING_SIZE);
+ if (st->codec->extradata) {
+ st->codec->extradata_size = 4;
+ memcpy(st->codec->extradata, *pp, 4);
+ }
+ }
+ *pp += 4;
+ av_metadata_set2(&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[i - 1] = 0;
+ av_metadata_set2(&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 == CODEC_ID_NONE &&
+ stream_type == STREAM_TYPE_PRIVATE_DATA)
+ mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
+ 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 */
+ uint8_t *mp4_dec_config_descr = NULL;
+ int mp4_dec_config_descr_len = 0;
+ int mp4_es_id = 0;
+
+#ifdef DEBUG
+ av_dlog(ts->stream, "PMT: len %i\n", section_len);
+ av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (uint8_t *)section, section_len);
+#endif
+
+ 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\n",
+ h->id, h->sec_num, h->last_sec_num);
+
+ if (h->tid != PMT_TID)
+ return;
+
+ clear_program(ts, h->id);
+ pcr_pid = get16(&p, p_end) & 0x1fff;
+ if (pcr_pid < 0)
+ return;
+ add_pid_to_pmt(ts, h->id, pcr_pid);
+
+ av_dlog(ts->stream, "pcr_pid=0x%x\n", pcr_pid);
+
+ program_info_length = get16(&p, p_end) & 0xfff;
+ if (program_info_length < 0)
+ return;
+ 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_es_id,
+ &mp4_dec_config_descr, &mp4_dec_config_descr_len);
+ } 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 = 1;
+
+ for(;;) {
+ st = 0;
+ stream_type = get8(&p, p_end);
+ if (stream_type < 0)
+ break;
+ pid = get16(&p, p_end) & 0x1fff;
+ if (pid < 0)
+ break;
- flags = pes->header[7];
- r = pes->header + 9;
- pes->pts = AV_NOPTS_VALUE;
- pes->dts = AV_NOPTS_VALUE;
- if ((flags & 0xc0) == 0x80) {
- pes->pts = get_pts(r);
- r += 5;
- } else if ((flags & 0xc0) == 0xc0) {
- pes->pts = get_pts(r);
- r += 5;
- pes->dts = get_pts(r);
- r += 5;
- }
- /* we got the full header. We parse it and get the payload */
- pes->state = MPEGTS_PAYLOAD;
- }
+ /* now create ffmpeg stream */
+ if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
+ pes = ts->pids[pid]->u.pes_filter.opaque;
+ if (!pes->st)
+ pes->st = av_new_stream(pes->stream, pes->pid);
+ st = pes->st;
+ } else {
+ 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 = av_new_stream(pes->stream, pes->pid);
+ }
+
+ if (!st)
+ goto out;
+
+ if (!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) & 0xfff;
+ if (desc_list_len < 0)
break;
- case MPEGTS_PAYLOAD:
- if (pes->total_size) {
- len = pes->total_size - pes->data_index;
- if (len > buf_size)
- len = buf_size;
- } else {
- len = buf_size;
- }
- if (len > 0) {
- AVPacket *pkt = ts->pkt;
- if (pes->st && av_new_packet(pkt, len) == 0) {
- memcpy(pkt->data, p, len);
- pkt->stream_index = pes->st->index;
- pkt->pts = pes->pts;
- /* reset pts values */
- pes->pts = AV_NOPTS_VALUE;
- pes->dts = AV_NOPTS_VALUE;
- ts->stop_parse = 1;
- return;
- }
+ desc_list_end = p + desc_list_len;
+ if (desc_list_end > p_end)
+ break;
+ for(;;) {
+ if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p, desc_list_end,
+ mp4_dec_config_descr_len, mp4_es_id, pid, mp4_dec_config_descr) < 0)
+ break;
+
+ if (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;
}
- buf_size = 0;
+ }
+ p = desc_list_end;
+ }
+
+ out:
+ av_free(mp4_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;
+
+#ifdef DEBUG
+ av_dlog(ts->stream, "PAT:\n");
+ av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (uint8_t *)section, section_len);
+#endif
+ p_end = section + section_len - 4;
+ p = section;
+ if (parse_section_header(h, &p, p_end) < 0)
+ return;
+ if (h->tid != PAT_TID)
+ return;
+
+ clear_programs(ts);
+ for(;;) {
+ sid = get16(&p, p_end);
+ if (sid < 0)
break;
- case MPEGTS_SKIP:
- buf_size = 0;
+ pmt_pid = get16(&p, p_end) & 0x1fff;
+ if (pmt_pid < 0)
break;
+
+ av_dlog(ts->stream, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
+
+ if (sid == 0x0000) {
+ /* NIT info */
+ } else {
+ av_new_program(ts->stream, sid);
+ if (ts->pids[pmt_pid])
+ mpegts_close_filter(ts, ts->pids[pmt_pid]);
+ mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
+ 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);
}
}
}
-static int add_pes_stream(MpegTSContext *ts, int pid, int stream_type)
+static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
{
- MpegTSFilter *tss;
- PESContext *pes;
+ 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;
- /* if no pid found, then add a pid context */
- pes = av_mallocz(sizeof(PESContext));
- if (!pes)
- return -1;
- pes->ts = ts;
- pes->stream = ts->stream;
- pes->pid = pid;
- pes->stream_type = stream_type;
- tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
- if (!tss) {
- av_free(pes);
- return -1;
+#ifdef DEBUG
+ av_dlog(ts->stream, "SDT:\n");
+ av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (uint8_t *)section, section_len);
+#endif
+
+ p_end = section + section_len - 4;
+ p = section;
+ if (parse_section_header(h, &p, p_end) < 0)
+ return;
+ if (h->tid != SDT_TID)
+ return;
+ onid = get16(&p, p_end);
+ if (onid < 0)
+ return;
+ val = get8(&p, p_end);
+ if (val < 0)
+ return;
+ for(;;) {
+ sid = get16(&p, p_end);
+ if (sid < 0)
+ break;
+ val = get8(&p, p_end);
+ if (val < 0)
+ break;
+ desc_list_len = get16(&p, p_end) & 0xfff;
+ if (desc_list_len < 0)
+ break;
+ desc_list_end = p + desc_list_len;
+ if (desc_list_end > p_end)
+ break;
+ for(;;) {
+ desc_tag = get8(&p, desc_list_end);
+ if (desc_tag < 0)
+ break;
+ desc_len = get8(&p, desc_list_end);
+ desc_end = p + desc_len;
+ if (desc_end > desc_list_end)
+ break;
+
+ 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_metadata_set2(&program->metadata, "service_name", name, 0);
+ av_metadata_set2(&program->metadata, "service_provider", provider_name, 0);
+ }
+ }
+ av_free(name);
+ av_free(provider_name);
+ break;
+ default:
+ break;
+ }
+ p = desc_end;
+ }
+ p = desc_list_end;
}
- return 0;
}
/* handle one TS packet */
-static void handle_packet(MpegTSContext *ts, const uint8_t *packet)
+static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
{
AVFormatContext *s = ts->stream;
MpegTSFilter *tss;
int len, pid, cc, cc_ok, afc, is_start;
const uint8_t *p, *p_end;
+ int64_t pos;
- pid = ((packet[1] & 0x1f) << 8) | packet[2];
+ 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 == NULL && is_start) {
- add_pes_stream(ts, pid, 0);
+ add_pes_stream(ts, pid, -1);
tss = ts->pids[pid];
}
if (!tss)
- return;
+ return 0;
/* continuity check (currently not used) */
cc = (packet[3] & 0xf);
cc_ok = (tss->last_cc < 0) || ((((tss->last_cc + 1) & 0x0f) == cc));
tss->last_cc = cc;
-
+
/* skip adaptation field */
afc = (packet[3] >> 4) & 3;
p = packet + 4;
if (afc == 0) /* reserved value */
- return;
+ return 0;
if (afc == 2) /* adaptation field only */
- return;
+ return 0;
if (afc == 3) {
/* skip adapation field */
p += p[0] + 1;
/* if past the end of packet, ignore */
p_end = packet + TS_PACKET_SIZE;
if (p >= p_end)
- return;
-
+ return 0;
+
+ pos = avio_tell(ts->stream->pb);
+ ts->pos47= pos % ts->raw_packet_size;
+
if (tss->type == MPEGTS_SECTION) {
if (is_start) {
/* pointer field present */
len = *p++;
if (p + len > p_end)
- return;
+ return 0;
if (len && cc_ok) {
- /* write remaning section bytes */
- write_section_data(s, tss,
+ /* write remaining section bytes */
+ write_section_data(s, 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(s, tss,
+ write_section_data(s, tss,
p, p_end - p, 1);
}
} else {
if (cc_ok) {
- write_section_data(s, tss,
+ write_section_data(s, tss,
p, p_end - p, 0);
}
}
} else {
- tss->u.pes_filter.pes_cb(tss->u.pes_filter.opaque,
- p, p_end - p, is_start);
+ int ret;
+ // Note: The position here points actually behind the current packet.
+ if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
+ pos - ts->raw_packet_size)) < 0)
+ return ret;
}
+
+ return 0;
}
/* XXX: try to find a better synchro over several packets (use
get_packet_size() ?) */
-static int mpegts_resync(ByteIOContext *pb)
+static int mpegts_resync(AVFormatContext *s)
{
+ AVIOContext *pb = s->pb;
int c, i;
for(i = 0;i < MAX_RESYNC_SIZE; i++) {
- c = url_fgetc(pb);
- if (c < 0)
+ c = avio_r8(pb);
+ if (pb->eof_reached)
return -1;
if (c == 0x47) {
- url_fseek(pb, -1, SEEK_CUR);
+ avio_seek(pb, -1, SEEK_CUR);
return 0;
}
}
+ av_log(s, AV_LOG_ERROR, "max resync size reached, could not find sync byte\n");
/* no sync found */
return -1;
}
/* return -1 if error or EOF. Return 0 if OK. */
-static int read_packet(ByteIOContext *pb, uint8_t *buf, int raw_packet_size)
+static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size)
{
+ AVIOContext *pb = s->pb;
int skip, len;
for(;;) {
- len = get_buffer(pb, buf, TS_PACKET_SIZE);
+ len = avio_read(pb, buf, TS_PACKET_SIZE);
if (len != TS_PACKET_SIZE)
- return AVERROR_IO;
+ return AVERROR(EIO);
/* check paquet sync byte */
if (buf[0] != 0x47) {
/* find a new packet start */
- url_fseek(pb, -TS_PACKET_SIZE, SEEK_CUR);
- if (mpegts_resync(pb) < 0)
- return AVERROR_INVALIDDATA;
+ avio_seek(pb, -TS_PACKET_SIZE, SEEK_CUR);
+ if (mpegts_resync(s) < 0)
+ return AVERROR(EAGAIN);
else
continue;
} else {
skip = raw_packet_size - TS_PACKET_SIZE;
if (skip > 0)
- url_fskip(pb, skip);
+ avio_skip(pb, skip);
break;
}
}
static int handle_packets(MpegTSContext *ts, int nb_packets)
{
AVFormatContext *s = ts->stream;
- ByteIOContext *pb = &s->pb;
uint8_t packet[TS_PACKET_SIZE];
int packet_num, ret;
ts->stop_parse = 0;
packet_num = 0;
for(;;) {
- if (ts->stop_parse)
+ if (ts->stop_parse>0)
break;
packet_num++;
if (nb_packets != 0 && packet_num >= nb_packets)
break;
- ret = read_packet(pb, packet, ts->raw_packet_size);
+ ret = read_packet(s, packet, ts->raw_packet_size);
+ if (ret != 0)
+ return ret;
+ ret = handle_packet(ts, packet);
if (ret != 0)
return ret;
- handle_packet(ts, packet);
}
return 0;
}
{
#if 1
const int size= p->buf_size;
- int score, fec_score;
+ int score, fec_score, dvhs_score;
+ int check_count= size / TS_FEC_PACKET_SIZE;
#define CHECK_COUNT 10
-
- if (size < (TS_FEC_PACKET_SIZE * CHECK_COUNT))
+
+ if (check_count < CHECK_COUNT)
return -1;
-
- score = analyze(p->buf, TS_PACKET_SIZE *CHECK_COUNT, TS_PACKET_SIZE, NULL);
- fec_score= analyze(p->buf, TS_FEC_PACKET_SIZE*CHECK_COUNT, TS_FEC_PACKET_SIZE, NULL);
-// av_log(NULL, AV_LOG_DEBUG, "score: %d, fec_score: %d \n", score, fec_score);
-
+
+ score = analyze(p->buf, TS_PACKET_SIZE *check_count, TS_PACKET_SIZE , NULL)*CHECK_COUNT/check_count;
+ dvhs_score= analyze(p->buf, TS_DVHS_PACKET_SIZE*check_count, TS_DVHS_PACKET_SIZE, NULL)*CHECK_COUNT/check_count;
+ fec_score = analyze(p->buf, TS_FEC_PACKET_SIZE *check_count, TS_FEC_PACKET_SIZE , NULL)*CHECK_COUNT/check_count;
+// av_log(NULL, AV_LOG_DEBUG, "score: %d, dvhs_score: %d, fec_score: %d \n", score, dvhs_score, fec_score);
+
// we need a clear definition for the returned score otherwise things will become messy sooner or later
- if (score > fec_score && score > 6) return AVPROBE_SCORE_MAX + score - CHECK_COUNT;
+ if (score > fec_score && score > dvhs_score && score > 6) return AVPROBE_SCORE_MAX + score - CHECK_COUNT;
+ else if(dvhs_score > score && dvhs_score > fec_score && dvhs_score > 6) return AVPROBE_SCORE_MAX + dvhs_score - CHECK_COUNT;
else if( fec_score > 6) return AVPROBE_SCORE_MAX + fec_score - CHECK_COUNT;
else return -1;
#else
/* only use the extension for safer guess */
- if (match_ext(p->filename, "ts"))
+ if (av_match_ext(p->filename, "ts"))
return AVPROBE_SCORE_MAX;
else
return 0;
#endif
}
-void set_service_cb(void *opaque, int ret)
-{
- MpegTSContext *ts = opaque;
- ts->set_service_ret = ret;
- ts->stop_parse = 1;
-}
-
-/* return the 90 kHz PCR and the extension for the 27 MHz PCR. return
+/* 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,
+static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
const uint8_t *packet)
{
int afc, len, flags;
return -1;
if (len < 6)
return -1;
- v = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
+ v = AV_RB32(p);
*ppcr_high = ((int64_t)v << 1) | (p[4] >> 7);
*ppcr_low = ((p[4] & 1) << 8) | p[5];
return 0;
AVFormatParameters *ap)
{
MpegTSContext *ts = s->priv_data;
- ByteIOContext *pb = &s->pb;
- uint8_t buf[1024];
- int len, sid;
+ AVIOContext *pb = s->pb;
+ uint8_t buf[5*1024];
+ int len;
int64_t pos;
- MpegTSService *service;
-
+
if (ap) {
- ts->mpeg2ts_raw = ap->mpeg2ts_raw;
ts->mpeg2ts_compute_pcr = ap->mpeg2ts_compute_pcr;
+ if(ap->mpeg2ts_raw){
+ av_log(s, AV_LOG_ERROR, "use mpegtsraw_demuxer!\n");
+ return -1;
+ }
}
/* read the first 1024 bytes to get packet size */
- pos = url_ftell(pb);
- len = get_buffer(pb, buf, sizeof(buf));
+ pos = avio_tell(pb);
+ len = avio_read(pb, buf, sizeof(buf));
if (len != sizeof(buf))
goto fail;
ts->raw_packet_size = get_packet_size(buf, sizeof(buf));
ts->stream = s;
ts->auto_guess = 0;
- if (!ts->mpeg2ts_raw) {
+ if (s->iformat == &ff_mpegts_demuxer) {
/* normal demux */
- if (!ts->auto_guess) {
- ts->set_service_ret = -1;
-
- /* first do a scaning to get all the services */
- url_fseek(pb, pos, SEEK_SET);
- mpegts_scan_sdt(ts);
-
- handle_packets(ts, MAX_SCAN_PACKETS);
-
- if (ts->nb_services <= 0) {
- /* no SDT found, we try to look at the PAT */
-
- /* First remove the SDT filters from each PID */
- int i;
- for (i=0; i < NB_PID_MAX; i++) {
- if (ts->pids[i])
- mpegts_close_filter(ts, ts->pids[i]);
- }
- url_fseek(pb, pos, SEEK_SET);
- mpegts_scan_pat(ts);
-
- handle_packets(ts, MAX_SCAN_PACKETS);
- }
-
- if (ts->nb_services <= 0)
- return -1;
-
- /* tune to first service found */
- service = ts->services[0];
- sid = service->sid;
-#ifdef DEBUG_SI
- printf("tuning to '%s'\n", service->name);
-#endif
-
- /* now find the info for the first service if we found any,
- otherwise try to filter all PATs */
-
- url_fseek(pb, pos, SEEK_SET);
- mpegts_set_service(ts, sid, set_service_cb, ts);
-
- handle_packets(ts, MAX_SCAN_PACKETS);
-
- /* if could not find service, exit */
- if (ts->set_service_ret != 0)
- return -1;
-
-#ifdef DEBUG_SI
- printf("tuning done\n");
-#endif
- }
+ /* first do a scaning to get all the services */
+ if (avio_seek(pb, pos, SEEK_SET) < 0)
+ av_log(s, AV_LOG_ERROR, "Unable to seek back to the start\n");
+
+ mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
+
+ mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
+
+ handle_packets(ts, s->probesize / ts->raw_packet_size);
+ /* 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;
int64_t pcrs[2], pcr_h;
int packet_count[2];
uint8_t packet[TS_PACKET_SIZE];
-
+
/* only read packets */
- s->pts_num = 1;
- s->pts_den = 27000000;
-
st = av_new_stream(s, 0);
if (!st)
goto fail;
- st->codec.codec_type = CODEC_TYPE_DATA;
- st->codec.codec_id = CODEC_ID_MPEG2TS;
-
+ av_set_pts_info(st, 60, 1, 27000000);
+ st->codec->codec_type = AVMEDIA_TYPE_DATA;
+ st->codec->codec_id = 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->pb, packet, ts->raw_packet_size);
+ ret = read_packet(s, packet, ts->raw_packet_size);
if (ret < 0)
return -1;
- pid = ((packet[1] & 0x1f) << 8) | packet[2];
+ pid = AV_RB16(packet + 1) & 0x1fff;
if ((pcr_pid == -1 || pcr_pid == pid) &&
parse_pcr(&pcr_h, &pcr_l, packet) == 0) {
pcr_pid = pid;
}
nb_packets++;
}
- ts->pcr_pid = pcr_pid;
/* 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 * 1000000.0 / 27.0e6;
+ st->codec->bit_rate = s->bit_rate;
+ st->start_time = ts->cur_pcr;
#if 0
- printf("start=%0.3f pcr=%0.3f incr=%d\n",
+ av_log(ts->stream, AV_LOG_DEBUG, "start=%0.3f pcr=%0.3f incr=%d\n",
st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
#endif
}
- url_fseek(pb, pos, SEEK_SET);
+ avio_seek(pb, pos, SEEK_SET);
return 0;
fail:
return -1;
uint8_t pcr_buf[12];
if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
- return -ENOMEM;
- ret = read_packet(&s->pb, pkt->data, ts->raw_packet_size);
+ return AVERROR(ENOMEM);
+ pkt->pos= avio_tell(s->pb);
+ ret = read_packet(s, pkt->data, ts->raw_packet_size);
if (ret < 0) {
av_free_packet(pkt);
return ret;
/* 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 = url_ftell(&s->pb);
+ pos = avio_tell(s->pb);
for(i = 0; i < MAX_PACKET_READAHEAD; i++) {
- url_fseek(&s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
- get_buffer(&s->pb, pcr_buf, 12);
+ 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)) /
+ ts->pcr_incr = ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
(i + 1);
break;
}
}
- url_fseek(&s->pb, pos, SEEK_SET);
+ avio_seek(s->pb, pos, SEEK_SET);
/* no next PCR found: we use previous increment */
ts->cur_pcr = pcr_h * 300 + pcr_l;
}
AVPacket *pkt)
{
MpegTSContext *ts = s->priv_data;
+ int ret, i;
- if (!ts->mpeg2ts_raw) {
- ts->pkt = pkt;
- return handle_packets(ts, 0);
- } else {
- return mpegts_raw_read_packet(s, pkt);
+ if (avio_tell(s->pb) != ts->last_pos) {
+ /* seek detected, flush pes buffer */
+ 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;
+ av_freep(&pes->buffer);
+ pes->data_index = 0;
+ pes->state = MPEGTS_SKIP; /* skip until pes header */
+ }
+ }
+ }
+
+ ts->pkt = pkt;
+ ret = handle_packets(ts, 0);
+ if (ret < 0) {
+ /* 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;
+ }
+ }
+ }
}
+
+ ts->last_pos = avio_tell(s->pb);
+
+ return ret;
}
static int mpegts_read_close(AVFormatContext *s)
{
MpegTSContext *ts = s->priv_data;
int i;
+
+ clear_programs(ts);
+
for(i=0;i<NB_PID_MAX;i++)
- av_free(ts->pids[i]);
+ if (ts->pids[i]) mpegts_close_filter(ts, ts->pids[i]);
+
return 0;
}
-static int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
- int64_t *ppos, int find_next)
+static 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, pid;
-
- pos = *ppos;
+ int pcr_l, pcr_pid = ((PESContext*)s->streams[stream_index]->priv_data)->pcr_pid;
+ const int find_next= 1;
+ pos = ((*ppos + ts->raw_packet_size - 1 - ts->pos47) / ts->raw_packet_size) * ts->raw_packet_size + ts->pos47;
if (find_next) {
for(;;) {
- url_fseek(&s->pb, pos, SEEK_SET);
- if (get_buffer(&s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
+ avio_seek(s->pb, pos, SEEK_SET);
+ if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
return AV_NOPTS_VALUE;
- pid = ((buf[1] & 0x1f) << 8) | buf[2];
- if (pid == ts->pcr_pid &&
+ if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
parse_pcr(×tamp, &pcr_l, buf) == 0) {
break;
}
pos -= ts->raw_packet_size;
if (pos < 0)
return AV_NOPTS_VALUE;
- url_fseek(&s->pb, pos, SEEK_SET);
- if (get_buffer(&s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
+ avio_seek(s->pb, pos, SEEK_SET);
+ if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
return AV_NOPTS_VALUE;
- pid = ((buf[1] & 0x1f) << 8) | buf[2];
- if (pid == ts->pcr_pid &&
+ if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
parse_pcr(×tamp, &pcr_l, buf) == 0) {
break;
}
}
}
*ppos = pos;
+
return timestamp;
}
-typedef int64_t ReadTimestampFunc(AVFormatContext *s, int stream_index,
- int64_t *ppos, int find_next);
+#ifdef USE_SYNCPOINT_SEARCH
-static int64_t do_block_align(int64_t val, int block_align)
+static int read_seek2(AVFormatContext *s,
+ int stream_index,
+ int64_t min_ts,
+ int64_t target_ts,
+ int64_t max_ts,
+ int flags)
{
- return (val / block_align) * block_align;
-}
+ int64_t pos;
-/* XXX: use it in other formats */
-static int timestamp_read_seek(AVFormatContext *s,
- int stream_index, int64_t timestamp,
- ReadTimestampFunc *read_timestamp,
- int block_align)
-{
- int64_t pos_min, pos_max, pos;
- int64_t dts_min, dts_max, dts;
+ int64_t ts_ret, ts_adj;
+ int stream_index_gen_search;
+ AVStream *st;
+ AVParserState *backup;
-#ifdef DEBUG_SEEK
- printf("read_seek: %d %0.3f\n", stream_index, timestamp / 90000.0);
-#endif
+ backup = ff_store_parser_state(s);
- pos_min = 0;
- dts_min = read_timestamp(s, stream_index, &pos_min, 1);
- if (dts_min == AV_NOPTS_VALUE) {
- /* we can reach this case only if no PTS are present in
- the whole stream */
- return -1;
- }
- pos_max = do_block_align(url_filesize(url_fileno(&s->pb)), block_align) -
- block_align;
- dts_max = read_timestamp(s, stream_index, &pos_max, 0);
-
- while (pos_min <= pos_max) {
-#ifdef DEBUG_SEEK
- printf("pos_min=0x%llx pos_max=0x%llx dts_min=%0.3f dts_max=%0.3f\n",
- pos_min, pos_max,
- dts_min / 90000.0, dts_max / 90000.0);
-#endif
- if (timestamp <= dts_min) {
- pos = pos_min;
- goto found;
- } else if (timestamp >= dts_max) {
- pos = pos_max;
- goto found;
- } else {
- /* interpolate position (better than dichotomy) */
- pos = (int64_t)((double)(pos_max - pos_min) *
- (double)(timestamp - dts_min) /
- (double)(dts_max - dts_min)) + pos_min;
- pos = do_block_align(pos, block_align);
- }
-#ifdef DEBUG_SEEK
- printf("pos=0x%llx\n", pos);
-#endif
- /* read the next timestamp */
- dts = read_timestamp(s, stream_index, &pos, 1);
- /* check if we are lucky */
- if (dts == AV_NOPTS_VALUE) {
- /* should never happen */
- pos = pos_min;
- goto found;
- } else if (timestamp == dts) {
- goto found;
- } else if (timestamp < dts) {
- pos_max = pos;
- dts_max = read_timestamp(s, stream_index, &pos_max, 0);
- if (dts_max == AV_NOPTS_VALUE) {
- /* should never happen */
- break;
- } else if (timestamp >= dts_max) {
- pos = pos_max;
- goto found;
+ // detect direction of seeking for search purposes
+ flags |= (target_ts - min_ts > (uint64_t)(max_ts - target_ts)) ?
+ AVSEEK_FLAG_BACKWARD : 0;
+
+ if (flags & AVSEEK_FLAG_BYTE) {
+ // use position directly, we will search starting from it
+ pos = target_ts;
+ } else {
+ // search for some position with good timestamp match
+ if (stream_index < 0) {
+ stream_index_gen_search = av_find_default_stream_index(s);
+ if (stream_index_gen_search < 0) {
+ ff_restore_parser_state(s, backup);
+ return -1;
}
+
+ st = s->streams[stream_index_gen_search];
+ // timestamp for default must be expressed in AV_TIME_BASE units
+ ts_adj = av_rescale(target_ts,
+ st->time_base.den,
+ AV_TIME_BASE * (int64_t)st->time_base.num);
} else {
- pos_min = pos + block_align;
- dts_min = read_timestamp(s, stream_index, &pos_min, 1);
- if (dts_min == AV_NOPTS_VALUE) {
- /* should never happen */
- goto found;
- } else if (timestamp <= dts_min) {
- goto found;
- }
+ ts_adj = target_ts;
+ stream_index_gen_search = stream_index;
+ }
+ pos = av_gen_search(s, stream_index_gen_search, ts_adj,
+ 0, INT64_MAX, -1,
+ AV_NOPTS_VALUE,
+ AV_NOPTS_VALUE,
+ flags, &ts_ret, mpegts_get_pcr);
+ if (pos < 0) {
+ ff_restore_parser_state(s, backup);
+ return -1;
}
}
- pos = pos_min;
- found:
-#ifdef DEBUG_SEEK
- pos_min = pos;
- dts_min = read_timestamp(s, stream_index, &pos_min, 1);
- pos_min += block_align;
- dts_max = read_timestamp(s, stream_index, &pos_min, 1);
- printf("pos=0x%llx %0.3f<=%0.3f<=%0.3f\n",
- pos, dts_min / 90000.0, timestamp / 90000.0, dts_max / 90000.0);
-#endif
- /* do the seek */
- url_fseek(&s->pb, pos, SEEK_SET);
+
+ // search for actual matching keyframe/starting position for all streams
+ if (ff_gen_syncpoint_search(s, stream_index, pos,
+ min_ts, target_ts, max_ts,
+ flags) < 0) {
+ ff_restore_parser_state(s, backup);
+ return -1;
+ }
+
+ ff_free_parser_state(s, backup);
return 0;
}
-static int mpegts_read_seek(AVFormatContext *s,
- int stream_index, int64_t timestamp)
+static int read_seek(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
{
+ int ret;
+ if (flags & AVSEEK_FLAG_BACKWARD) {
+ flags &= ~AVSEEK_FLAG_BACKWARD;
+ ret = read_seek2(s, stream_index, INT64_MIN, target_ts, target_ts, flags);
+ if (ret < 0)
+ // for compatibility reasons, seek to the best-fitting timestamp
+ ret = read_seek2(s, stream_index, INT64_MIN, target_ts, INT64_MAX, flags);
+ } else {
+ ret = read_seek2(s, stream_index, target_ts, target_ts, INT64_MAX, flags);
+ if (ret < 0)
+ // for compatibility reasons, seek to the best-fitting timestamp
+ ret = read_seek2(s, stream_index, INT64_MIN, target_ts, INT64_MAX, flags);
+ }
+ return ret;
+}
+
+#else
+
+static int read_seek(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){
MpegTSContext *ts = s->priv_data;
+ uint8_t buf[TS_PACKET_SIZE];
+ int64_t pos;
+
+ if(av_seek_frame_binary(s, stream_index, target_ts, flags) < 0)
+ return -1;
- timestamp = (timestamp * 90000) / AV_TIME_BASE;
+ pos= avio_tell(s->pb);
- return timestamp_read_seek(s, stream_index, timestamp,
- mpegts_get_pcr, ts->raw_packet_size);
+ for(;;) {
+ avio_seek(s->pb, pos, SEEK_SET);
+ if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
+ return -1;
+// pid = AV_RB16(buf + 1) & 0x1fff;
+ if(buf[1] & 0x40) break;
+ pos += ts->raw_packet_size;
+ }
+ avio_seek(s->pb, pos, SEEK_SET);
+
+ return 0;
}
+#endif
+
/**************************************************************/
/* parsing functions - called from other demuxers such as RTP */
-MpegTSContext *mpegts_parse_open(AVFormatContext *s)
+MpegTSContext *ff_mpegts_parse_open(AVFormatContext *s)
{
MpegTSContext *ts;
-
+
ts = av_mallocz(sizeof(MpegTSContext));
if (!ts)
return NULL;
/* return the consumed length if a packet was output, or -1 if no
packet is output */
-int mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
+int ff_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
const uint8_t *buf, int len)
{
int len1;
ts->pkt = pkt;
ts->stop_parse = 0;
for(;;) {
- if (ts->stop_parse)
+ if (ts->stop_parse>0)
break;
if (len < TS_PACKET_SIZE)
return -1;
if (buf[0] != 0x47) {
- buf--;
+ buf++;
len--;
} else {
handle_packet(ts, buf);
return len1 - len;
}
-void mpegts_parse_close(MpegTSContext *ts)
+void ff_mpegts_parse_close(MpegTSContext *ts)
{
int i;
av_free(ts);
}
-AVInputFormat mpegts_demux = {
+AVInputFormat ff_mpegts_demuxer = {
"mpegts",
- "MPEG2 transport stream format",
+ NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"),
sizeof(MpegTSContext),
mpegts_probe,
mpegts_read_header,
mpegts_read_packet,
mpegts_read_close,
- mpegts_read_seek,
- .flags = AVFMT_SHOW_IDS,
+ read_seek,
+ mpegts_get_pcr,
+ .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
+#ifdef USE_SYNCPOINT_SEARCH
+ .read_seek2 = read_seek2,
+#endif
};
-int mpegts_init(void)
-{
- av_register_input_format(&mpegts_demux);
-#ifdef CONFIG_ENCODERS
- av_register_output_format(&mpegts_mux);
+AVInputFormat ff_mpegtsraw_demuxer = {
+ "mpegtsraw",
+ NULL_IF_CONFIG_SMALL("MPEG-2 raw transport stream format"),
+ sizeof(MpegTSContext),
+ NULL,
+ mpegts_read_header,
+ mpegts_raw_read_packet,
+ mpegts_read_close,
+ read_seek,
+ mpegts_get_pcr,
+ .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
+#ifdef USE_SYNCPOINT_SEARCH
+ .read_seek2 = read_seek2,
#endif
- return 0;
-}
+};