* MPEG2 transport stream (aka DVB) demuxer
* Copyright (c) 2002-2003 Fabrice Bellard
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-//#define DEBUG
-//#define DEBUG_SEEK
+//#define USE_SYNCPOINT_SEARCH
#include "libavutil/crc.h"
#include "libavutil/intreadwrite.h"
+#include "libavutil/log.h"
+#include "libavutil/dict.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
#include "libavcodec/bytestream.h"
#include "avformat.h"
#include "mpegts.h"
#include "internal.h"
-
-/* 1.0 second at 24Mbit/s */
-#define MAX_SCAN_PACKETS 32000
+#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
#define MAX_PES_PAYLOAD 200*1024
-typedef struct PESContext PESContext;
-
-static PESContext* add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid, int stream_type);
-
enum MpegTSFilterType {
MPEGTS_PES,
MPEGTS_SECTION,
};
struct MpegTSContext {
+ const AVClass *class;
/* user data */
AVFormatContext *stream;
/** raw packet size, including FEC if present */
MpegTSFilter *pids[NB_PID_MAX];
};
+static const AVOption options[] = {
+ {"compute_pcr", "Compute exact PCR for each transport stream packet.", offsetof(MpegTSContext, mpeg2ts_compute_pcr), FF_OPT_TYPE_INT,
+ {.dbl = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
+ { NULL },
+};
+
+static const AVClass mpegtsraw_class = {
+ .class_name = "mpegtsraw demuxer",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
/* TS stream handling */
enum MpegTSState {
MPEGTS_HEADER = 0,
+ MPEGTS_PESHEADER,
MPEGTS_PESHEADER_FILL,
MPEGTS_PAYLOAD,
MPEGTS_SKIP,
};
/* enough for PES header + length */
-#define PES_START_SIZE 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 flags; /**< copied to the AVPacket flags */
int total_size;
int pes_header_size;
+ int extended_stream_id;
int64_t pts, dts;
int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
uint8_t header[MAX_PES_HEADER_SIZE];
uint8_t *buffer;
-};
+} PESContext;
-extern AVInputFormat mpegts_demuxer;
+extern AVInputFormat ff_mpegts_demuxer;
static void clear_program(MpegTSContext *ts, unsigned int programid)
{
}
/**
- * \brief discard_pid() decides if the pid is to be discarded according
+ * @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
+ * @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)
}
/**
- * Assembles PES packets out of TS packets, and then calls the "section_cb"
+ * 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,
MpegTSFilter *filter;
MpegTSSectionFilter *sec;
- dprintf(ts->stream, "Filter: pid=0x%x\n", pid);
+ av_dlog(ts->stream, "Filter: pid=0x%x\n", pid);
if (pid >= NB_PID_MAX || ts->pids[pid])
return 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;
typedef struct {
uint32_t stream_type;
- enum CodecType codec_type;
+ enum AVMediaType 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 },
- { 0x1b, CODEC_TYPE_VIDEO, CODEC_ID_H264 },
- { 0xd1, CODEC_TYPE_VIDEO, CODEC_ID_DIRAC },
- { 0xea, CODEC_TYPE_VIDEO, CODEC_ID_VC1 },
+ { 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 const StreamType HDMV_types[] = {
- { 0x81, CODEC_TYPE_AUDIO, CODEC_ID_AC3 },
- { 0x82, CODEC_TYPE_AUDIO, CODEC_ID_DTS },
+ { 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 },
};
/* ATSC ? */
static const StreamType MISC_types[] = {
- { 0x81, CODEC_TYPE_AUDIO, CODEC_ID_AC3 },
- { 0x8a, CODEC_TYPE_AUDIO, CODEC_ID_DTS },
+ { 0x81, AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 },
+ { 0x8a, AVMEDIA_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 },
+ { MKTAG('d','r','a','c'), AVMEDIA_TYPE_VIDEO, CODEC_ID_DIRAC },
+ { MKTAG('A','C','-','3'), AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 },
+ { MKTAG('B','S','S','D'), AVMEDIA_TYPE_AUDIO, CODEC_ID_S302M },
{ 0 },
};
/* descriptor present */
static const StreamType DESC_types[] = {
- { 0x6a, CODEC_TYPE_AUDIO, CODEC_ID_AC3 }, /* AC-3 descriptor */
- { 0x7a, CODEC_TYPE_AUDIO, CODEC_ID_AC3 },
- { 0x7b, CODEC_TYPE_AUDIO, CODEC_ID_DTS },
- { 0x59, CODEC_TYPE_SUBTITLE, CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
+ { 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 mpegts_find_stream_type(AVStream *st,
}
}
-static AVStream *new_pes_av_stream(PESContext *pes, uint32_t prog_reg_desc, uint32_t code)
+static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
+ uint32_t stream_type, uint32_t prog_reg_desc)
{
- AVStream *st = av_new_stream(pes->stream, pes->pid);
-
- if (!st)
- return NULL;
-
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_PROBE;
+ 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;
- dprintf(pes->stream, "stream_type=%x pid=%x prog_reg_desc=%.4s\n",
- pes->stream_type, pes->pid, (char*)&prog_reg_desc);
+ 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_PROBE)
+ st->codec->codec_id == CODEC_ID_NONE) {
mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
- if (st->codec->codec_id == CODEC_ID_PROBE)
+ 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 = 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;
+ }
+ }
+ if (st->codec->codec_id == CODEC_ID_NONE)
mpegts_find_stream_type(st, pes->stream_type, MISC_types);
- /* stream was not present in PMT, guess based on PES start code */
- if (st->codec->codec_id == CODEC_ID_PROBE) {
- if (code >= 0x1c0 && code <= 0x1df) {
- st->codec->codec_type = CODEC_TYPE_AUDIO;
- st->codec->codec_id = CODEC_ID_MP2;
- } else if (code == 0x1bd) {
- st->codec->codec_type = CODEC_TYPE_AUDIO;
- st->codec->codec_id = CODEC_ID_AC3;
+ return 0;
+}
+
+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;
+
+ if(pes->total_size != MAX_PES_PAYLOAD &&
+ pes->pes_header_size + pes->data_index != pes->total_size + 6) {
+ av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
+ pes->flags |= AV_PKT_FLAG_CORRUPT;
+ }
+ memset(pkt->data+pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
+
+ // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
+ if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
+ pkt->stream_index = pes->sub_st->index;
+ else
+ pkt->stream_index = pes->st->index;
+ pkt->pts = pes->pts;
+ pkt->dts = pes->dts;
+ /* store position of first TS packet of this PES packet */
+ pkt->pos = pes->ts_packet_pos;
+ pkt->flags = pes->flags;
+
+ /* reset pts values */
+ pes->pts = AV_NOPTS_VALUE;
+ pes->dts = AV_NOPTS_VALUE;
+ pes->buffer = NULL;
+ pes->data_index = 0;
+ pes->flags = 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 (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
+ pes->header[2] == 0x01) {
+ /* it must be an mpeg2 PES stream */
+ code = pes->header[3] | 0x100;
+ av_dlog(pes->stream, "pid=%x pes_code=%#x\n", pes->pid, code);
+
+ if ((pes->st && pes->st->discard == AVDISCARD_ALL) ||
+ code == 0x1be) /* padding_stream */
+ goto skip;
- return st;
+ /* 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);
+ }
+
+ 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) {
+ 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 */
+ 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 = 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 (!ts->stop_parse && 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) {
+ ff_mp4_parse_es_descr(&pb, es_id);
+ av_dlog(s, "ES_ID %#x\n", *es_id);
+ 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_dict_set(&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_dict_set(&st->metadata, "language", language, 0);
+ break;
+ case 0x0a: /* ISO 639 language descriptor */
+ for (i = 0; i + 4 <= desc_len; i += 4) {
+ language[i + 0] = get8(pp, desc_end);
+ language[i + 1] = get8(pp, desc_end);
+ language[i + 2] = get8(pp, desc_end);
+ language[i + 3] = ',';
+ switch (get8(pp, desc_end)) {
+ case 0x01: st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS; break;
+ case 0x02: st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED; break;
+ case 0x03: st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; break;
+ }
+ }
+ if (i) {
+ language[i - 1] = 0;
+ av_dict_set(&st->metadata, "language", language, 0);
+ }
+ break;
+ case 0x05: /* registration descriptor */
+ st->codec->codec_tag = bytestream_get_le32(pp);
+ av_dlog(fc, "reg_desc=%.4s\n", (char*)&st->codec->codec_tag);
+ if (st->codec->codec_id == 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)
SectionHeader h1, *h = &h1;
PESContext *pes;
AVStream *st;
- const uint8_t *p, *p_end, *desc_list_end, *desc_end;
+ const uint8_t *p, *p_end, *desc_list_end;
int program_info_length, pcr_pid, pid, stream_type;
- int desc_list_len, desc_len, desc_tag;
- int comp_page, anc_page;
- char language[4];
+ 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
- dprintf(ts->stream, "PMT: len %i\n", section_len);
- av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (uint8_t *)section, section_len);
-#endif
+ av_dlog(ts->stream, "PMT: len %i\n", section_len);
+ hex_dump_debug(ts->stream, (uint8_t *)section, section_len);
p_end = section + section_len - 4;
p = section;
if (parse_section_header(h, &p, p_end) < 0)
return;
- dprintf(ts->stream, "sid=0x%x sec_num=%d/%d\n",
+ 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;
add_pid_to_pmt(ts, h->id, pcr_pid);
- dprintf(ts->stream, "pcr_pid=0x%x\n", 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)
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 == 0x05 && len >= 4) { // registration descriptor
+ 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 += program_info_length;
if (p >= p_end)
- return;
+ 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);
/* 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, stream_type);
+ pes = add_pes_stream(ts, pid, pcr_pid);
if (pes)
- st = new_pes_av_stream(pes, prog_reg_desc, 0);
+ st = av_new_stream(pes->stream, pes->pid);
}
if (!st)
- return;
+ 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);
- av_program_add_stream_index(ts->stream, h->id, st->index);
+ ff_program_add_stream_index(ts->stream, h->id, st->index);
desc_list_len = get16(&p, p_end) & 0xfff;
if (desc_list_len < 0)
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);
- if (desc_len < 0)
- break;
- desc_end = p + desc_len;
- if (desc_end > desc_list_end)
+ 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;
- dprintf(ts->stream, "tag: 0x%02x len=%d\n",
- desc_tag, desc_len);
-
- if (st->codec->codec_id == CODEC_ID_PROBE &&
- stream_type == STREAM_TYPE_PRIVATE_DATA)
- mpegts_find_stream_type(st, desc_tag, DESC_types);
-
- switch(desc_tag) {
- case 0x59: /* subtitling descriptor */
- language[0] = get8(&p, desc_end);
- language[1] = get8(&p, desc_end);
- language[2] = get8(&p, desc_end);
- language[3] = 0;
- 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);
- if (st->codec->codec_id == CODEC_ID_PROBE &&
- stream_type == STREAM_TYPE_PRIVATE_DATA)
- mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
- break;
- default:
- 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;
}
- p = desc_end;
}
p = desc_list_end;
}
- /* all parameters are there */
- ts->stop_parse++;
- mpegts_close_filter(ts, filter);
+
+ out:
+ av_free(mp4_dec_config_descr);
}
static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
const uint8_t *p, *p_end;
int sid, pmt_pid;
-#ifdef DEBUG
- dprintf(ts->stream, "PAT:\n");
- av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (uint8_t *)section, section_len);
-#endif
+ av_dlog(ts->stream, "PAT:\n");
+ hex_dump_debug(ts->stream, (uint8_t *)section, section_len);
+
p_end = section + section_len - 4;
p = section;
if (parse_section_header(h, &p, p_end) < 0)
if (pmt_pid < 0)
break;
- dprintf(ts->stream, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
+ 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);
- ts->stop_parse--;
+ 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);
}
}
- /* not found */
- ts->stop_parse++;
-
- mpegts_close_filter(ts, filter);
}
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
- dprintf(ts->stream, "SDT:\n");
- av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (uint8_t *)section, section_len);
-#endif
+ av_dlog(ts->stream, "SDT:\n");
+ hex_dump_debug(ts->stream, (uint8_t *)section, section_len);
p_end = section + section_len - 4;
p = section;
if (desc_end > desc_list_end)
break;
- dprintf(ts->stream, "tag: 0x%02x len=%d\n",
+ av_dlog(ts->stream, "tag: 0x%02x len=%d\n",
desc_tag, desc_len);
switch(desc_tag) {
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_dict_set(&program->metadata, "service_name", name, 0);
+ av_dict_set(&program->metadata, "service_provider", provider_name, 0);
}
}
av_free(name);
}
}
-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);
-
- 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;
-
- /* stream not present in PMT */
- if (!pes->st)
- pes->st = new_pes_av_stream(pes, 0, code);
- if (!pes->st)
- return AVERROR(ENOMEM);
-
- if (pes->st->discard == AVDISCARD_ALL ||
- !((code >= 0x1c0 && code <= 0x1df) ||
- (code >= 0x1e0 && code <= 0x1ef) ||
- (code == 0x1bd) || (code == 0x1fd)))
- goto skip;
- pes->state = MPEGTS_PESHEADER_FILL;
- pes->total_size = AV_RB16(pes->header + 4);
- /* NOTE: a zero total size means the PES size is
- unbounded */
- 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 < 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;
-
- 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;
- }
-
- if (pes->total_size > pes->data_index - 6)
- pes->total_size -= pes->data_index - 6;
- else
- 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);
-
- /* 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) {
- 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;
- }
- }
-
- return 0;
-}
-
-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 int handle_packet(MpegTSContext *ts, const uint8_t *packet)
{
AVFormatContext *s = ts->stream;
MpegTSFilter *tss;
- int len, pid, cc, cc_ok, afc, is_start;
+ int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
+ has_adaptation, has_payload;
const uint8_t *p, *p_end;
int64_t pos;
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 0;
+ afc = (packet[3] >> 4) & 3;
+ if (afc == 0) /* reserved value */
+ return 0;
+ has_adaptation = afc & 2;
+ has_payload = afc & 1;
+ is_discontinuity = has_adaptation
+ && packet[4] != 0 /* with length > 0 */
+ && (packet[5] & 0x80); /* and discontinuity indicated */
+
/* continuity check (currently not used) */
cc = (packet[3] & 0xf);
- cc_ok = (tss->last_cc < 0) || ((((tss->last_cc + 1) & 0x0f) == cc));
+ expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
+ cc_ok = pid == 0x1FFF // null packet PID
+ || is_discontinuity
+ || tss->last_cc < 0
+ || expected_cc == cc;
+
tss->last_cc = cc;
+ if (!cc_ok) {
+ av_log(ts->stream, AV_LOG_WARNING,
+ "Continuity check failed for pid %d expected %d got %d\n",
+ pid, expected_cc, cc);
+ if(tss->type == MPEGTS_PES) {
+ PESContext *pc = tss->u.pes_filter.opaque;
+ pc->flags |= AV_PKT_FLAG_CORRUPT;
+ }
+ }
- /* skip adaptation field */
- afc = (packet[3] >> 4) & 3;
- p = packet + 4;
- if (afc == 0) /* reserved value */
+ if (!has_payload)
return 0;
- if (afc == 2) /* adaptation field only */
- return 0;
- if (afc == 3) {
+ p = packet + 4;
+ if (has_adaptation) {
/* skip adapation field */
p += p[0] + 1;
}
if (p >= p_end)
return 0;
- pos = url_ftell(ts->stream->pb);
+ pos = avio_tell(ts->stream->pb);
ts->pos47= pos % ts->raw_packet_size;
if (tss->type == MPEGTS_SECTION) {
/* 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(EIO);
+ return len < 0 ? len : AVERROR_EOF;
/* 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;
+ int packet_num, ret = 0;
+
+ if (avio_tell(s->pb) != ts->last_pos) {
+ int i;
+ av_dlog(ts->stream, "Skipping after seek\n");
+ /* seek detected, flush pes buffer */
+ for (i = 0; i < NB_PID_MAX; i++) {
+ if (ts->pids[i]) {
+ if (ts->pids[i]->type == MPEGTS_PES) {
+ PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
+ av_freep(&pes->buffer);
+ pes->data_index = 0;
+ pes->state = MPEGTS_SKIP; /* skip until pes header */
+ }
+ ts->pids[i]->last_cc = -1;
+ }
+ }
+ }
ts->stop_parse = 0;
packet_num = 0;
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;
+ break;
ret = handle_packet(ts, packet);
if (ret != 0)
- return ret;
+ break;
}
- return 0;
+ ts->last_pos = avio_tell(s->pb);
+ return ret;
}
static int mpegts_probe(AVProbeData *p)
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;
AVFormatParameters *ap)
{
MpegTSContext *ts = s->priv_data;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
uint8_t buf[5*1024];
int len;
int64_t pos;
- if (ap) {
- 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 (s->iformat == &mpegts_demuxer) {
+ if (s->iformat == &ff_mpegts_demuxer) {
/* normal demux */
/* first do a scaning to get all the services */
- url_fseek(pb, pos, SEEK_SET);
+ if (pb->seekable && 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);
+ handle_packets(ts, s->probesize / ts->raw_packet_size);
/* if could not find service, enable auto_guess */
ts->auto_guess = 1;
- dprintf(ts->stream, "tuning done\n");
+ av_dlog(ts->stream, "tuning done\n");
s->ctx_flags |= AVFMTCTX_NOHEADER;
} else {
if (!st)
goto fail;
av_set_pts_info(st, 60, 1, 27000000);
- st->codec->codec_type = CODEC_TYPE_DATA;
+ 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 */
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 = AV_RB16(packet + 1) & 0x1fff;
s->bit_rate = (TS_PACKET_SIZE * 8) * 27e6 / ts->pcr_incr;
st->codec->bit_rate = s->bit_rate;
st->start_time = ts->cur_pcr;
-#if 0
- 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
+ av_dlog(ts->stream, "start=%0.3f pcr=%0.3f incr=%d\n",
+ st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
}
- url_fseek(pb, pos, SEEK_SET);
+ avio_seek(pb, pos, SEEK_SET);
return 0;
fail:
return -1;
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= 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)) /
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;
}
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;
ret = handle_packets(ts, 0);
if (ret < 0) {
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;
}
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;
if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
parse_pcr(×tamp, &pcr_l, buf) == 0) {
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;
if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
parse_pcr(×tamp, &pcr_l, buf) == 0) {
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= avio_tell(s->pb);
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 -1;
// pid = AV_RB16(buf + 1) & 0x1fff;
if(buf[1] & 0x40) break;
pos += ts->raw_packet_size;
}
- url_fseek(s->pb, pos, SEEK_SET);
+ 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;
/* 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;
av_free(ts);
}
-AVInputFormat mpegts_demuxer = {
- "mpegts",
- NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"),
- sizeof(MpegTSContext),
- mpegts_probe,
- mpegts_read_header,
- mpegts_read_packet,
- mpegts_read_close,
- read_seek,
- mpegts_get_pcr,
+AVInputFormat ff_mpegts_demuxer = {
+ .name = "mpegts",
+ .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"),
+ .priv_data_size = sizeof(MpegTSContext),
+ .read_probe = mpegts_probe,
+ .read_header = mpegts_read_header,
+ .read_packet = mpegts_read_packet,
+ .read_close = mpegts_read_close,
+ .read_seek = read_seek,
+ .read_timestamp = mpegts_get_pcr,
.flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
+#ifdef USE_SYNCPOINT_SEARCH
+ .read_seek2 = read_seek2,
+#endif
};
-AVInputFormat 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,
+AVInputFormat ff_mpegtsraw_demuxer = {
+ .name = "mpegtsraw",
+ .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 raw transport stream format"),
+ .priv_data_size = sizeof(MpegTSContext),
+ .read_header = mpegts_read_header,
+ .read_packet = mpegts_raw_read_packet,
+ .read_close = mpegts_read_close,
+ .read_seek = read_seek,
+ .read_timestamp = mpegts_get_pcr,
.flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
+#ifdef USE_SYNCPOINT_SEARCH
+ .read_seek2 = read_seek2,
+#endif
+ .priv_class = &mpegtsraw_class,
};