/*
* MPEG2 transport stream (aka DVB) demuxer
- * Copyright (c) 2002-2003 Fabrice Bellard.
+ * Copyright (c) 2002-2003 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* 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 "crc.h"
-#include "mpegts.h"
-#include "allformats.h"
-//#define DEBUG_SI
+//#define DEBUG
//#define DEBUG_SEEK
+//#define USE_SYNCPOINT_SEARCH
+
+#include "libavutil/crc.h"
+#include "libavutil/intreadwrite.h"
+#include "libavcodec/bytestream.h"
+#include "avformat.h"
+#include "mpegts.h"
+#include "internal.h"
+#include "seek.h"
/* 1.0 second at 24Mbit/s */
#define MAX_SCAN_PACKETS 32000
/* maximum size in which we look for synchronisation if
synchronisation is lost */
-#define MAX_RESYNC_SIZE 4096
-
-typedef struct PESContext PESContext;
+#define MAX_RESYNC_SIZE 65536
-static PESContext* add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid, int stream_type);
-static AVStream* new_pes_av_stream(PESContext *pes, uint32_t code);
+#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; /**< MPEG Program Number of stream */
- char *provider_name; /**< DVB Network name, "" if not DVB stream */
- char *name; /**< DVB Service name, "MPEG Program [sid]" if not DVB stream*/
-} 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;
/** 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;
int stop_parse;
/** packet containing Audio/Video data */
AVPacket *pkt;
+ /** to detect seek */
+ int64_t last_pos;
/******************************************/
/* private mpegts data */
/* scan context */
- /** number of PMTs in the last PAT seen */
- int nb_services;
- /** list of PMTs in the last PAT seen */
- MpegTSService **services;
+ /** 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 */
enum MpegTSState {
MPEGTS_HEADER = 0,
+ MPEGTS_PESHEADER,
MPEGTS_PESHEADER_FILL,
MPEGTS_PAYLOAD,
MPEGTS_SKIP,
};
/* enough for PES header + length */
-#define PES_START_SIZE 9
+#define PES_START_SIZE 6
+#define PES_HEADER_SIZE 9
#define MAX_PES_HEADER_SIZE (9 + 255)
-struct PESContext {
+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 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;
+}
/**
* Assembles PES packets out of TS packets, and then calls the "section_cb"
/* 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) {
tss->end_of_section_reached = 1;
if (!tss->check_crc ||
- av_crc(av_crc04C11DB7, -1, tss->section_buf, tss->section_h_size) == 0)
+ 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 *filter;
MpegTSSectionFilter *sec;
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "Filter: pid=0x%x\n", pid);
-#endif
+ dprintf(ts->stream, "Filter: pid=0x%x\n", pid);
+
if (pid >= NB_PID_MAX || ts->pids[pid])
return NULL;
filter = av_mallocz(sizeof(MpegTSFilter));
pid = filter->pid;
if (filter->type == MPEGTS_SECTION)
av_freep(&filter->u.section_filter.section_buf);
- else if (filter->type == MPEGTS_PES)
- av_freep(&filter->u.pes_filter.opaque);
+ 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];
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 0;
}
-static MpegTSService *new_service(MpegTSContext *ts, int sid,
- char *provider_name, char *name)
+typedef struct {
+ uint32_t stream_type;
+ enum CodecType codec_type;
+ enum CodecID codec_id;
+} StreamType;
+
+static const StreamType ISO_types[] = {
+ { 0x01, CODEC_TYPE_VIDEO, CODEC_ID_MPEG2VIDEO },
+ { 0x02, CODEC_TYPE_VIDEO, CODEC_ID_MPEG2VIDEO },
+ { 0x03, CODEC_TYPE_AUDIO, CODEC_ID_MP3 },
+ { 0x04, CODEC_TYPE_AUDIO, CODEC_ID_MP3 },
+ { 0x0f, CODEC_TYPE_AUDIO, CODEC_ID_AAC },
+ { 0x10, CODEC_TYPE_VIDEO, CODEC_ID_MPEG4 },
+ { 0x11, CODEC_TYPE_AUDIO, CODEC_ID_AAC }, /* LATM syntax */
+ { 0x1b, CODEC_TYPE_VIDEO, CODEC_ID_H264 },
+ { 0xd1, CODEC_TYPE_VIDEO, CODEC_ID_DIRAC },
+ { 0xea, CODEC_TYPE_VIDEO, CODEC_ID_VC1 },
+ { 0 },
+};
+
+static const StreamType HDMV_types[] = {
+ { 0x80, CODEC_TYPE_AUDIO, CODEC_ID_PCM_BLURAY },
+ { 0x81, CODEC_TYPE_AUDIO, CODEC_ID_AC3 },
+ { 0x82, CODEC_TYPE_AUDIO, CODEC_ID_DTS },
+ { 0x83, CODEC_TYPE_AUDIO, CODEC_ID_TRUEHD },
+ { 0x84, CODEC_TYPE_AUDIO, CODEC_ID_EAC3 },
+ { 0x90, CODEC_TYPE_SUBTITLE, CODEC_ID_HDMV_PGS_SUBTITLE },
+ { 0 },
+};
+
+/* ATSC ? */
+static const StreamType MISC_types[] = {
+ { 0x81, CODEC_TYPE_AUDIO, CODEC_ID_AC3 },
+ { 0x8a, CODEC_TYPE_AUDIO, CODEC_ID_DTS },
+ { 0 },
+};
+
+static const StreamType REGD_types[] = {
+ { MKTAG('d','r','a','c'), CODEC_TYPE_VIDEO, CODEC_ID_DIRAC },
+ { MKTAG('A','C','-','3'), CODEC_TYPE_AUDIO, CODEC_ID_AC3 },
+ { 0 },
+};
+
+/* descriptor present */
+static const StreamType DESC_types[] = {
+ { 0x6a, CODEC_TYPE_AUDIO, CODEC_ID_AC3 }, /* AC-3 descriptor */
+ { 0x7a, CODEC_TYPE_AUDIO, CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
+ { 0x7b, CODEC_TYPE_AUDIO, CODEC_ID_DTS },
+ { 0x56, CODEC_TYPE_SUBTITLE, CODEC_ID_DVB_TELETEXT },
+ { 0x59, CODEC_TYPE_SUBTITLE, CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
+ { 0 },
+};
+
+static void mpegts_find_stream_type(AVStream *st,
+ uint32_t stream_type, const StreamType *types)
{
- MpegTSService *service=NULL;
- int i;
+ 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;
+ }
+ }
+}
+
+static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
+ uint32_t stream_type, uint32_t prog_reg_desc)
+{
+ av_set_pts_info(st, 33, 1, 90000);
+ st->priv_data = pes;
+ st->codec->codec_type = CODEC_TYPE_DATA;
+ st->codec->codec_id = CODEC_ID_NONE;
+ st->need_parsing = AVSTREAM_PARSE_FULL;
+ pes->st = st;
+ pes->stream_type = stream_type;
+
+ av_log(pes->stream, AV_LOG_DEBUG,
+ "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
+ st->index, pes->stream_type, pes->pid, (char*)&prog_reg_desc);
+
+ st->codec->codec_tag = pes->stream_type;
+
+ mpegts_find_stream_type(st, pes->stream_type, ISO_types);
+ if (prog_reg_desc == AV_RL32("HDMV") &&
+ 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);
+ }
+
+ av_set_pts_info(sub_st, 33, 1, 90000);
+ sub_st->priv_data = sub_pes;
+ sub_st->codec->codec_type = CODEC_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;
+ }
+ }
+ if (st->codec->codec_id == CODEC_ID_NONE)
+ mpegts_find_stream_type(st, pes->stream_type, MISC_types);
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "new_service: "
- "sid=0x%04x provider='%s' name='%s'\n",
- sid, provider_name, name);
+ return 0;
+}
+
+static int64_t get_pts(const uint8_t *p)
+{
+ int64_t pts = (int64_t)((p[0] >> 1) & 0x07) << 30;
+ pts |= (AV_RB16(p + 1) >> 1) << 15;
+ pts |= AV_RB16(p + 3) >> 1;
+ return pts;
+}
+
+static void new_pes_packet(PESContext *pes, AVPacket *pkt)
+{
+ av_init_packet(pkt);
+
+ pkt->destruct = av_destruct_packet;
+ pkt->data = pes->buffer;
+ pkt->size = pes->data_index;
+ memset(pkt->data+pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
+
+ // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
+ if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
+ pkt->stream_index = pes->sub_st->index;
+ else
+ pkt->stream_index = pes->st->index;
+ pkt->pts = pes->pts;
+ pkt->dts = pes->dts;
+ /* store position of first TS packet of this PES packet */
+ pkt->pos = pes->ts_packet_pos;
+
+ /* 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 int mpegts_push_data(MpegTSFilter *filter,
+ const uint8_t *buf, int buf_size, int is_start,
+ int64_t pos)
+{
+ PESContext *pes = filter->u.pes_filter.opaque;
+ MpegTSContext *ts = pes->ts;
+ const uint8_t *p;
+ int len, code;
+
+ if(!ts->pkt)
+ return 0;
+
+ if (is_start) {
+ if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
+ new_pes_packet(pes, ts->pkt);
+ ts->stop_parse = 1;
+ }
+ pes->state = MPEGTS_HEADER;
+ pes->data_index = 0;
+ pes->ts_packet_pos = pos;
+ }
+ p = buf;
+ while (buf_size > 0) {
+ switch(pes->state) {
+ case MPEGTS_HEADER:
+ len = PES_START_SIZE - pes->data_index;
+ if (len > buf_size)
+ len = buf_size;
+ memcpy(pes->header + pes->data_index, p, len);
+ pes->data_index += len;
+ p += len;
+ buf_size -= len;
+ if (pes->data_index == PES_START_SIZE) {
+ /* we got all the PES or section header. We can now
+ decide */
+#if 0
+ 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;
+ dprintf(pes->stream, "pid=%x pes_code=%#x\n", pes->pid, code);
- for(i=0; i<ts->nb_services; i++)
- if(ts->services[i]->sid == sid)
- service= ts->services[i];
+ if ((!pes->st && pes->stream->nb_streams == MAX_STREAMS) ||
+ (pes->st && pes->st->discard == AVDISCARD_ALL) ||
+ code == 0x1be) /* padding_stream */
+ goto skip;
+
+ /* stream not present in PMT */
+ if (!pes->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);
+ }
- if(!service){
- service = av_mallocz(sizeof(MpegTSService));
- if (!service)
- return NULL;
- dynarray_add(&ts->services, &ts->nb_services, service);
+ pes->total_size = AV_RB16(pes->header + 4);
+ /* NOTE: a zero total size means the PES size is
+ unbounded */
+ if (!pes->total_size)
+ pes->total_size = MAX_PES_PAYLOAD;
+
+ /* allocate pes buffer */
+ pes->buffer = av_malloc(pes->total_size+FF_INPUT_BUFFER_PADDING_SIZE);
+ if (!pes->buffer)
+ return AVERROR(ENOMEM);
+
+ if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
+ code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
+ code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
+ code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
+ pes->state = MPEGTS_PESHEADER;
+ if (pes->st->codec->codec_id == CODEC_ID_NONE) {
+ dprintf(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 */
+ skip:
+ pes->state = MPEGTS_SKIP;
+ continue;
+ }
+ }
+ break;
+ /**********************************************/
+ /* PES packing parsing */
+ case MPEGTS_PESHEADER:
+ len = PES_HEADER_SIZE - pes->data_index;
+ if (len < 0)
+ return -1;
+ if (len > buf_size)
+ len = buf_size;
+ memcpy(pes->header + pes->data_index, p, len);
+ pes->data_index += len;
+ p += len;
+ buf_size -= len;
+ if (pes->data_index == PES_HEADER_SIZE) {
+ pes->pes_header_size = pes->header[8] + 9;
+ pes->state = MPEGTS_PESHEADER_FILL;
+ }
+ break;
+ case MPEGTS_PESHEADER_FILL:
+ len = pes->pes_header_size - pes->data_index;
+ if (len < 0)
+ return -1;
+ if (len > buf_size)
+ len = buf_size;
+ memcpy(pes->header + pes->data_index, p, len);
+ pes->data_index += len;
+ p += len;
+ buf_size -= len;
+ if (pes->data_index == pes->pes_header_size) {
+ const uint8_t *r;
+ unsigned int flags, pes_ext, skip;
+
+ flags = pes->header[7];
+ r = pes->header + 9;
+ pes->pts = AV_NOPTS_VALUE;
+ pes->dts = AV_NOPTS_VALUE;
+ if ((flags & 0xc0) == 0x80) {
+ pes->dts = 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;
+ }
+ 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+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;
+ }
+ memcpy(pes->buffer+pes->data_index, p, buf_size);
+ pes->data_index += buf_size;
+ }
+ buf_size = 0;
+ break;
+ case MPEGTS_SKIP:
+ buf_size = 0;
+ break;
+ }
}
- service->sid = sid;
- assert((!provider_name) == (!name));
- if(name){
- av_free(service->provider_name);
- av_free(service-> name);
- service->provider_name = provider_name;
- service-> name = name;
+
+ 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 service;
+ return pes;
}
static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
const uint8_t *p, *p_end, *desc_list_end, *desc_end;
int program_info_length, pcr_pid, pid, stream_type;
int desc_list_len, desc_len, desc_tag;
- int comp_page = 0, anc_page = 0; /* initialize to kill warnings */
- char language[4] = {0}; /* initialize to kill warnings */
+ int comp_page, anc_page;
+ char language[4];
+ uint32_t prog_reg_desc = 0; /* registration descriptor */
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "PMT: len %i\n", section_len);
+#ifdef DEBUG
+ dprintf(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;
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "sid=0x%x sec_num=%d/%d\n",
+
+ dprintf(ts->stream, "sid=0x%x sec_num=%d/%d\n",
h->id, h->sec_num, h->last_sec_num);
-#endif
+
if (h->tid != PMT_TID)
return;
+ clear_program(ts, h->id);
pcr_pid = get16(&p, p_end) & 0x1fff;
if (pcr_pid < 0)
return;
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "pcr_pid=0x%x\n", pcr_pid);
-#endif
+ add_pid_to_pmt(ts, h->id, pcr_pid);
+
+ dprintf(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);
+ if(len > program_info_length - 2)
+ //something else is broken, exit the program_descriptors_loop
+ break;
+ program_info_length -= len + 2;
+ 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)
return;
+
+ // stop parsing after pmt, we found header
+ if (!ts->stream->nb_streams)
+ ts->stop_parse = 1;
+
for(;;) {
- language[0] = 0;
st = 0;
stream_type = get8(&p, p_end);
if (stream_type < 0)
pid = get16(&p, p_end) & 0x1fff;
if (pid < 0)
break;
+
+ /* now create ffmpeg stream */
+ if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
+ pes = ts->pids[pid]->u.pes_filter.opaque;
+ 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)
+ return;
+
+ if (!pes->stream_type)
+ mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
+
+ add_pid_to_pmt(ts, h->id, pid);
+
+ av_program_add_stream_index(ts->stream, h->id, st->index);
+
desc_list_len = get16(&p, p_end) & 0xfff;
if (desc_list_len < 0)
break;
desc_tag = get8(&p, desc_list_end);
if (desc_tag < 0)
break;
- if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
- if((desc_tag == 0x6A) || (desc_tag == 0x7A)) {
- /*assume DVB AC-3 Audio*/
- stream_type = STREAM_TYPE_AUDIO_AC3;
- } else if(desc_tag == 0x7B) {
- /* DVB DTS audio */
- stream_type = STREAM_TYPE_AUDIO_DTS;
- }
- }
desc_len = get8(&p, desc_list_end);
+ if (desc_len < 0)
+ break;
desc_end = p + desc_len;
if (desc_end > desc_list_end)
break;
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "tag: 0x%02x len=%d\n",
+
+ dprintf(ts->stream, "tag: 0x%02x len=%d\n",
desc_tag, desc_len);
-#endif
- switch(desc_tag) {
- case DVB_SUBT_DESCID:
- if (stream_type == STREAM_TYPE_PRIVATE_DATA)
- stream_type = STREAM_TYPE_SUBTITLE_DVB;
+ 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 0x56: /* DVB teletext descriptor */
+ language[0] = get8(&p, desc_end);
+ language[1] = get8(&p, desc_end);
+ language[2] = get8(&p, desc_end);
+ language[3] = 0;
+ av_metadata_set(&st->metadata, "language", language);
+ break;
+ case 0x59: /* subtitling descriptor */
language[0] = get8(&p, desc_end);
language[1] = get8(&p, desc_end);
language[2] = get8(&p, desc_end);
get8(&p, desc_end);
comp_page = get16(&p, desc_end);
anc_page = get16(&p, desc_end);
-
+ st->codec->sub_id = (anc_page << 16) | comp_page;
+ av_metadata_set(&st->metadata, "language", language);
break;
case 0x0a: /* ISO 639 language descriptor */
language[0] = get8(&p, desc_end);
language[1] = get8(&p, desc_end);
language[2] = get8(&p, desc_end);
language[3] = 0;
+ av_metadata_set(&st->metadata, "language", language);
+ break;
+ case 0x05: /* registration descriptor */
+ st->codec->codec_tag = bytestream_get_le32(&p);
+ dprintf(ts->stream, "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;
}
p = desc_end;
- }
- p = desc_list_end;
-
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "stream_type=%d pid=0x%x\n",
- stream_type, pid);
-#endif
- /* 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_VIDEO_VC1:
- case STREAM_TYPE_AUDIO_AAC:
- case STREAM_TYPE_AUDIO_AC3:
- case STREAM_TYPE_AUDIO_DTS:
- case STREAM_TYPE_SUBTITLE_DVB:
- if(ts->pids[pid]){
- assert(ts->pids[pid].type == MPEGTS_PES);
- pes= ts->pids[pid]->u.pes_filter.opaque;
- st= pes->st;
- }else{
- pes = add_pes_stream(ts, pid, pcr_pid, stream_type);
- if (pes)
- st = new_pes_av_stream(pes, 0);
- }
- break;
- default:
- /* we ignore the other streams */
- break;
- }
-
- if (st) {
- if (language[0] != 0) {
- st->language[0] = language[0];
- st->language[1] = language[1];
- st->language[2] = language[2];
- st->language[3] = language[3];
- }
-
- if (stream_type == STREAM_TYPE_SUBTITLE_DVB) {
- st->codec->sub_id = (anc_page << 16) | comp_page;
+ if (prog_reg_desc == AV_RL32("HDMV") && stream_type == 0x83 && pes->sub_st) {
+ av_program_add_stream_index(ts->stream, h->id, pes->sub_st->index);
+ pes->sub_st->codec->codec_tag = st->codec->codec_tag;
}
}
+ p = desc_list_end;
}
/* all parameters are there */
- ts->stop_parse++;
mpegts_close_filter(ts, filter);
}
const uint8_t *p, *p_end;
int sid, pmt_pid;
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "PAT:\n");
+#ifdef DEBUG
+ dprintf(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;
if (h->tid != PAT_TID)
return;
+ clear_programs(ts);
for(;;) {
sid = get16(&p, p_end);
if (sid < 0)
pmt_pid = get16(&p, p_end) & 0x1fff;
if (pmt_pid < 0)
break;
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
-#endif
+
+ dprintf(ts->stream, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
+
if (sid == 0x0000) {
/* NIT info */
} else {
- new_service(ts, sid, NULL, NULL);
- ts->stop_parse--;
+ av_new_program(ts->stream, sid);
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);
}
}
- /* not found */
- ts->stop_parse++;
-
- mpegts_close_filter(ts, filter);
-}
-
-static void mpegts_set_service(MpegTSContext *ts)
-{
- mpegts_open_section_filter(ts, PAT_PID,
- pat_cb, ts, 1);
}
static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
char *name, *provider_name;
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "SDT:\n");
+#ifdef DEBUG
+ dprintf(ts->stream, "SDT:\n");
av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (uint8_t *)section, section_len);
#endif
desc_end = p + desc_len;
if (desc_end > desc_list_end)
break;
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "tag: 0x%02x len=%d\n",
+
+ dprintf(ts->stream, "tag: 0x%02x len=%d\n",
desc_tag, desc_len);
-#endif
+
switch(desc_tag) {
case 0x48:
service_type = get8(&p, p_end);
if (!provider_name)
break;
name = getstr8(&p, p_end);
- if (!name)
- break;
- new_service(ts, sid, provider_name, name);
+ if (name) {
+ AVProgram *program = av_new_program(ts->stream, sid);
+ if(program) {
+ av_metadata_set(&program->metadata, "name", name);
+ av_metadata_set(&program->metadata, "provider_name", provider_name);
+ }
+ }
+ av_free(name);
+ av_free(provider_name);
break;
default:
break;
}
}
-/* scan services in a transport stream by looking at the SDT */
-static void mpegts_scan_sdt(MpegTSContext *ts)
-{
- mpegts_open_section_filter(ts, SDT_PID,
- sdt_cb, ts, 1);
-}
-
-static int64_t get_pts(const uint8_t *p)
-{
- int64_t pts;
- int val;
-
- 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;
-}
-
-/* return non zero if a packet could be constructed */
-static void mpegts_push_data(MpegTSFilter *filter,
- const uint8_t *buf, int buf_size, int is_start)
-{
- PESContext *pes = filter->u.pes_filter.opaque;
- MpegTSContext *ts = pes->ts;
- const uint8_t *p;
- int len, code;
-
- if(!ts->pkt)
- return;
-
- if (is_start) {
- pes->state = MPEGTS_HEADER;
- pes->data_index = 0;
- }
- p = buf;
- while (buf_size > 0) {
- switch(pes->state) {
- case MPEGTS_HEADER:
- len = PES_START_SIZE - pes->data_index;
- if (len > buf_size)
- len = buf_size;
- memcpy(pes->header + pes->data_index, p, len);
- pes->data_index += len;
- p += len;
- buf_size -= len;
- if (pes->data_index == PES_START_SIZE) {
- /* we got all the PES or section header. We can now
- decide */
-#if 0
- 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) || (code == 0x1fd)))
- goto skip;
- if (!pes->st) {
- /* allocate stream */
- new_pes_av_stream(pes, code);
- }
- pes->state = MPEGTS_PESHEADER_FILL;
- pes->total_size = (pes->header[4] << 8) | pes->header[5];
- /* 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;
- } else {
- /* otherwise, it should be a table */
- /* skip packet */
- skip:
- pes->state = MPEGTS_SKIP;
- continue;
- }
- }
- break;
- /**********************************************/
- /* PES packing parsing */
- case MPEGTS_PESHEADER_FILL:
- len = pes->pes_header_size - pes->data_index;
- if (len > buf_size)
- len = buf_size;
- memcpy(pes->header + pes->data_index, p, len);
- pes->data_index += len;
- p += len;
- buf_size -= len;
- if (pes->data_index == pes->pes_header_size) {
- const uint8_t *r;
- unsigned int flags;
-
- 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;
- }
- 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;
- pkt->dts = pes->dts;
- /* reset pts values */
- pes->pts = AV_NOPTS_VALUE;
- pes->dts = AV_NOPTS_VALUE;
- ts->stop_parse = 1;
- return;
- }
- }
- buf_size = 0;
- break;
- case MPEGTS_SKIP:
- buf_size = 0;
- break;
- }
- }
-}
-
-static AVStream* new_pes_av_stream(PESContext *pes, uint32_t code)
-{
- AVStream *st;
- int codec_type, codec_id;
-
- 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_VIDEO_VC1:
- codec_type = CODEC_TYPE_VIDEO;
- codec_id = CODEC_ID_VC1;
- 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;
- case STREAM_TYPE_AUDIO_DTS:
- codec_type = CODEC_TYPE_AUDIO;
- codec_id = CODEC_ID_DTS;
- break;
- case STREAM_TYPE_SUBTITLE_DVB:
- codec_type = CODEC_TYPE_SUBTITLE;
- codec_id = CODEC_ID_DVB_SUBTITLE;
- 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) {
- av_set_pts_info(st, 33, 1, 90000);
- st->priv_data = pes;
- st->codec->codec_type = codec_type;
- st->codec->codec_id = codec_id;
- st->need_parsing = AVSTREAM_PARSE_FULL;
- pes->st = st;
- }
- return st;
-}
-
-
-static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid, int stream_type)
-{
- 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->stream_type = stream_type;
- tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
- if (!tss) {
- av_free(pes);
- return 0;
- }
- return pes;
-}
-
/* 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, -1, 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);
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 = url_ftell(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 remaining section bytes */
write_section_data(s, tss,
p, len, 0);
/* check whether filter has been closed */
if (!ts->pids[pid])
- return;
+ return 0;
}
p += len;
if (p < p_end) {
}
}
} else {
- tss->u.pes_filter.pes_cb(tss,
- 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)
{
+ ByteIOContext *pb = s->pb;
int c, i;
for(i = 0;i < MAX_RESYNC_SIZE; i++) {
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)
{
+ ByteIOContext *pb = s->pb;
int skip, len;
for(;;) {
len = get_buffer(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;
+ if (mpegts_resync(s) < 0)
+ return AVERROR(EAGAIN);
else
continue;
} else {
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;
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, 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);
- dvhs_score = analyze(p->buf, TS_DVHS_PACKET_SIZE *CHECK_COUNT, TS_DVHS_PACKET_SIZE, NULL);
- fec_score= analyze(p->buf, TS_FEC_PACKET_SIZE*CHECK_COUNT, TS_FEC_PACKET_SIZE, NULL);
+ 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
#endif
}
-/* 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,
const uint8_t *packet)
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];
+ ByteIOContext *pb = s->pb;
+ uint8_t buf[5*1024];
int len;
int64_t pos;
/* first do a scaning to get all the services */
url_fseek(pb, pos, SEEK_SET);
- mpegts_scan_sdt(ts);
- mpegts_set_service(ts);
+ 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);
+ handle_packets(ts, s->probesize / ts->raw_packet_size);
/* if could not find service, enable auto_guess */
ts->auto_guess = 1;
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "tuning done\n");
-#endif
+ dprintf(ts->stream, "tuning done\n");
+
s->ctx_flags |= AVFMTCTX_NOHEADER;
} else {
AVStream *st;
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;
if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
return AVERROR(ENOMEM);
- pkt->pos= url_ftell(&s->pb);
- ret = read_packet(&s->pb, pkt->data, ts->raw_packet_size);
+ pkt->pos= url_ftell(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 = url_ftell(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);
+ url_fseek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
+ get_buffer(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)) /
break;
}
}
- url_fseek(&s->pb, pos, SEEK_SET);
+ url_fseek(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 (url_ftell(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;
- return handle_packets(ts, 0);
+ 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 = url_ftell(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++)
if (ts->pids[i]) mpegts_close_filter(ts, ts->pids[i]);
- for(i = 0; i < ts->nb_services; i++){
- av_free(ts->services[i]->provider_name);
- av_free(ts->services[i]->name);
- av_free(ts->services[i]);
- }
- av_freep(&ts->services);
-
return 0;
}
uint8_t buf[TS_PACKET_SIZE];
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->raw_packet_size) * ts->raw_packet_size;
+ 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)
+ url_fseek(s->pb, pos, SEEK_SET);
+ if (get_buffer(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
return AV_NOPTS_VALUE;
- if ((pcr_pid < 0 || (((buf[1] & 0x1f) << 8) | buf[2]) == 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)
+ url_fseek(s->pb, pos, SEEK_SET);
+ if (get_buffer(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
return AV_NOPTS_VALUE;
- if ((pcr_pid < 0 || (((buf[1] & 0x1f) << 8) | buf[2]) == pcr_pid) &&
+ if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
parse_pcr(×tamp, &pcr_l, buf) == 0) {
break;
}
return timestamp;
}
+#ifdef USE_SYNCPOINT_SEARCH
+
+static int read_seek2(AVFormatContext *s,
+ int stream_index,
+ int64_t min_ts,
+ int64_t target_ts,
+ int64_t max_ts,
+ int flags)
+{
+ int64_t pos;
+
+ int64_t ts_ret, ts_adj;
+ int stream_index_gen_search;
+ AVStream *st;
+ AVParserState *backup;
+
+ backup = ff_store_parser_state(s);
+
+ // 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 {
+ 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;
+ }
+ }
+
+ // 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 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];
if(av_seek_frame_binary(s, stream_index, target_ts, flags) < 0)
return -1;
- pos= url_ftell(&s->pb);
+ pos= url_ftell(s->pb);
for(;;) {
- url_fseek(&s->pb, pos, SEEK_SET);
- if (get_buffer(&s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
+ url_fseek(s->pb, pos, SEEK_SET);
+ if (get_buffer(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
return -1;
-// pid = ((buf[1] & 0x1f) << 8) | buf[2];
+// pid = AV_RB16(buf + 1) & 0x1fff;
if(buf[1] & 0x40) break;
pos += ts->raw_packet_size;
}
- url_fseek(&s->pb, pos, SEEK_SET);
+ url_fseek(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;
/* 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;
return len1 - len;
}
-void mpegts_parse_close(MpegTSContext *ts)
+void ff_mpegts_parse_close(MpegTSContext *ts)
{
int i;
AVInputFormat 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_close,
read_seek,
mpegts_get_pcr,
- .flags = AVFMT_SHOW_IDS,
+ .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
+#ifdef USE_SYNCPOINT_SEARCH
+ .read_seek2 = read_seek2,
+#endif
};
AVInputFormat mpegtsraw_demuxer = {
"mpegtsraw",
- "MPEG2 raw transport stream format",
+ NULL_IF_CONFIG_SMALL("MPEG-2 raw transport stream format"),
sizeof(MpegTSContext),
- mpegts_probe,
+ NULL,
mpegts_read_header,
mpegts_raw_read_packet,
mpegts_read_close,
read_seek,
mpegts_get_pcr,
- .flags = AVFMT_SHOW_IDS,
+ .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
+#ifdef USE_SYNCPOINT_SEARCH
+ .read_seek2 = read_seek2,
+#endif
};
projects / ffmpeg / blobdiff