X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fmpegts.c;h=15688a9747375eaad61aa77761dc1df8a460fe84;hb=b12d21733975f9001eecb480fc28e5e4473b1327;hp=410507db6dc2511de78a2230143629cc383e6d30;hpb=be9c00615b5c2cb858b9905854726ebe578c007b;p=ffmpeg diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c index 410507db6dc..15688a97473 100644 --- a/libavformat/mpegts.c +++ b/libavformat/mpegts.c @@ -28,6 +28,7 @@ #include "libavutil/mathematics.h" #include "libavutil/opt.h" #include "libavcodec/bytestream.h" +#include "libavcodec/get_bits.h" #include "avformat.h" #include "mpegts.h" #include "internal.h" @@ -42,6 +43,8 @@ #define MAX_PES_PAYLOAD 200*1024 +#define MAX_MP4_DESCR_COUNT 16 + enum MpegTSFilterType { MPEGTS_PES, MPEGTS_SECTION, @@ -72,6 +75,7 @@ typedef struct MpegTSSectionFilter { struct MpegTSFilter { int pid; + int es_id; int last_cc; /* last cc code (-1 if first packet) */ enum MpegTSFilterType type; union { @@ -126,7 +130,7 @@ struct MpegTSContext { }; static const AVOption options[] = { - {"compute_pcr", "Compute exact PCR for each transport stream packet.", offsetof(MpegTSContext, mpeg2ts_compute_pcr), FF_OPT_TYPE_INT, + {"compute_pcr", "Compute exact PCR for each transport stream packet.", offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_INT, {.dbl = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, { NULL }, }; @@ -164,6 +168,7 @@ typedef struct PESContext { 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; @@ -171,6 +176,7 @@ typedef struct PESContext { int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */ uint8_t header[MAX_PES_HEADER_SIZE]; uint8_t *buffer; + SLConfigDescr sl; } PESContext; extern AVInputFormat ff_mpegts_demuxer; @@ -314,6 +320,7 @@ static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, unsigned int ts->pids[pid] = filter; filter->type = MPEGTS_SECTION; filter->pid = pid; + filter->es_id = -1; filter->last_cc = -1; sec = &filter->u.section_filter; sec->section_cb = section_cb; @@ -342,6 +349,7 @@ static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid, ts->pids[pid] = filter; filter->type = MPEGTS_PES; filter->pid = pid; + filter->es_id = -1; filter->last_cc = -1; pes = &filter->u.pes_filter; pes->pes_cb = pes_cb; @@ -360,7 +368,7 @@ static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter) PESContext *pes = filter->u.pes_filter.opaque; av_freep(&pes->buffer); /* referenced private data will be freed later in - * av_close_input_stream */ + * avformat_close_input */ if (!((PESContext *)filter->u.pes_filter.opaque)->st) { av_freep(&filter->u.pes_filter.opaque); } @@ -448,7 +456,7 @@ static inline int get16(const uint8_t **pp, const uint8_t *p_end) return c; } -/* read and allocate a DVB string preceeded by its length */ +/* read and allocate a DVB string preceded by its length */ static char *getstr8(const uint8_t **pp, const uint8_t *p_end) { int len; @@ -569,7 +577,7 @@ static void mpegts_find_stream_type(AVStream *st, 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); + avpriv_set_pts_info(st, 33, 1, 90000); st->priv_data = pes; st->codec->codec_type = AVMEDIA_TYPE_DATA; st->codec->codec_id = CODEC_ID_NONE; @@ -597,13 +605,14 @@ static int mpegts_set_stream_info(AVStream *st, PESContext *pes, return AVERROR(ENOMEM); memcpy(sub_pes, pes, sizeof(*sub_pes)); - sub_st = av_new_stream(pes->stream, pes->pid); + sub_st = avformat_new_stream(pes->stream, NULL); if (!sub_st) { av_free(sub_pes); return AVERROR(ENOMEM); } - av_set_pts_info(sub_st, 33, 1, 90000); + sub_st->id = pes->pid; + avpriv_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; @@ -624,6 +633,12 @@ static void new_pes_packet(PESContext *pes, AVPacket *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 + PES_START_SIZE) { + av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n"); + pes->flags |= AV_PKT_FLAG_CORRUPT; + } memset(pkt->data+pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE); // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID @@ -635,12 +650,92 @@ static void new_pes_packet(PESContext *pes, AVPacket *pkt) 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; +} + +static uint64_t get_bits64(GetBitContext *gb, int bits) +{ + uint64_t ret = 0; + while (bits > 17) { + ret <<= 17; + ret |= get_bits(gb, 17); + bits -= 17; + } + ret <<= bits; + ret |= get_bits(gb, bits); + return ret; +} + +static int read_sl_header(PESContext *pes, SLConfigDescr *sl, const uint8_t *buf, int buf_size) +{ + GetBitContext gb; + int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0; + int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0; + int dts_flag = -1, cts_flag = -1; + int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE; + init_get_bits(&gb, buf, buf_size*8); + + if (sl->use_au_start) + au_start_flag = get_bits1(&gb); + if (sl->use_au_end) + au_end_flag = get_bits1(&gb); + if (!sl->use_au_start && !sl->use_au_end) + au_start_flag = au_end_flag = 1; + if (sl->ocr_len > 0) + ocr_flag = get_bits1(&gb); + if (sl->use_idle) + idle_flag = get_bits1(&gb); + if (sl->use_padding) + padding_flag = get_bits1(&gb); + if (padding_flag) + padding_bits = get_bits(&gb, 3); + + if (!idle_flag && (!padding_flag || padding_bits != 0)) { + if (sl->packet_seq_num_len) + skip_bits_long(&gb, sl->packet_seq_num_len); + if (sl->degr_prior_len) + if (get_bits1(&gb)) + skip_bits(&gb, sl->degr_prior_len); + if (ocr_flag) + skip_bits_long(&gb, sl->ocr_len); + if (au_start_flag) { + if (sl->use_rand_acc_pt) + get_bits1(&gb); + if (sl->au_seq_num_len > 0) + skip_bits_long(&gb, sl->au_seq_num_len); + if (sl->use_timestamps) { + dts_flag = get_bits1(&gb); + cts_flag = get_bits1(&gb); + } + } + if (sl->inst_bitrate_len) + inst_bitrate_flag = get_bits1(&gb); + if (dts_flag == 1) + dts = get_bits64(&gb, sl->timestamp_len); + if (cts_flag == 1) + cts = get_bits64(&gb, sl->timestamp_len); + if (sl->au_len > 0) + skip_bits_long(&gb, sl->au_len); + if (inst_bitrate_flag) + skip_bits_long(&gb, sl->inst_bitrate_len); + } + + if (dts != AV_NOPTS_VALUE) + pes->dts = dts; + if (cts != AV_NOPTS_VALUE) + pes->pts = cts; + + if (sl->timestamp_len && sl->timestamp_res) + avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res); + + return (get_bits_count(&gb) + 7) >> 3; } /* return non zero if a packet could be constructed */ @@ -691,9 +786,10 @@ static int mpegts_push_data(MpegTSFilter *filter, /* stream not present in PMT */ if (!pes->st) { - pes->st = av_new_stream(ts->stream, pes->pid); + pes->st = avformat_new_stream(ts->stream, NULL); if (!pes->st) return AVERROR(ENOMEM); + pes->st->id = pes->pid; mpegts_set_stream_info(pes->st, pes, 0, 0); } @@ -793,6 +889,12 @@ static int mpegts_push_data(MpegTSFilter *filter, /* we got the full header. We parse it and get the payload */ pes->state = MPEGTS_PAYLOAD; pes->data_index = 0; + if (pes->stream_type == 0x12) { + int sl_header_bytes = read_sl_header(pes, &pes->sl, p, buf_size); + pes->pes_header_size += sl_header_bytes; + p += sl_header_bytes; + buf_size -= sl_header_bytes; + } } break; case MPEGTS_PAYLOAD: @@ -817,9 +919,9 @@ static int mpegts_push_data(MpegTSFilter *filter, * 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 */ + * in the pes header, i.e. not counting the first PES_START_SIZE bytes */ if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD && - pes->pes_header_size + pes->data_index == pes->total_size + 6) { + pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) { ts->stop_parse = 1; new_pes_packet(pes, ts->pkt); } @@ -857,49 +959,289 @@ static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid) return pes; } +#define MAX_LEVEL 4 +typedef struct { + AVFormatContext *s; + AVIOContext pb; + Mp4Descr *descr; + Mp4Descr *active_descr; + int descr_count; + int max_descr_count; + int level; +} MP4DescrParseContext; + +static int init_MP4DescrParseContext( + MP4DescrParseContext *d, AVFormatContext *s, const uint8_t *buf, + unsigned size, Mp4Descr *descr, int max_descr_count) +{ + int ret; + if (size > (1<<30)) + return AVERROR_INVALIDDATA; + + if ((ret = ffio_init_context(&d->pb, (unsigned char*)buf, size, 0, + NULL, NULL, NULL, NULL)) < 0) + return ret; + + d->s = s; + d->level = 0; + d->descr_count = 0; + d->descr = descr; + d->active_descr = NULL; + d->max_descr_count = max_descr_count; + + return 0; +} + +static void update_offsets(AVIOContext *pb, int64_t *off, int *len) { + int64_t new_off = avio_tell(pb); + (*len) -= new_off - *off; + *off = new_off; +} + +static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len, + int target_tag); + +static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len) +{ + while (len > 0) { + if (parse_mp4_descr(d, off, len, 0) < 0) + return -1; + update_offsets(&d->pb, &off, &len); + } + return 0; +} + +static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len) +{ + avio_rb16(&d->pb); // ID + avio_r8(&d->pb); + avio_r8(&d->pb); + avio_r8(&d->pb); + avio_r8(&d->pb); + avio_r8(&d->pb); + update_offsets(&d->pb, &off, &len); + return parse_mp4_descr_arr(d, off, len); +} + +static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len) +{ + int id_flags; + if (len < 2) + return 0; + id_flags = avio_rb16(&d->pb); + if (!(id_flags & 0x0020)) { //URL_Flag + update_offsets(&d->pb, &off, &len); + return parse_mp4_descr_arr(d, off, len); //ES_Descriptor[] + } else { + return 0; + } +} + +static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len) +{ + int es_id = 0; + if (d->descr_count >= d->max_descr_count) + return -1; + ff_mp4_parse_es_descr(&d->pb, &es_id); + d->active_descr = d->descr + (d->descr_count++); + + d->active_descr->es_id = es_id; + update_offsets(&d->pb, &off, &len); + parse_mp4_descr(d, off, len, MP4DecConfigDescrTag); + update_offsets(&d->pb, &off, &len); + if (len > 0) + parse_mp4_descr(d, off, len, MP4SLDescrTag); + d->active_descr = NULL; + return 0; +} + +static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off, int len) +{ + Mp4Descr *descr = d->active_descr; + if (!descr) + return -1; + d->active_descr->dec_config_descr = av_malloc(len); + if (!descr->dec_config_descr) + return AVERROR(ENOMEM); + descr->dec_config_descr_len = len; + avio_read(&d->pb, descr->dec_config_descr, len); + return 0; +} + +static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len) +{ + Mp4Descr *descr = d->active_descr; + int predefined; + if (!descr) + return -1; + + predefined = avio_r8(&d->pb); + if (!predefined) { + int lengths; + int flags = avio_r8(&d->pb); + descr->sl.use_au_start = !!(flags & 0x80); + descr->sl.use_au_end = !!(flags & 0x40); + descr->sl.use_rand_acc_pt = !!(flags & 0x20); + descr->sl.use_padding = !!(flags & 0x08); + descr->sl.use_timestamps = !!(flags & 0x04); + descr->sl.use_idle = !!(flags & 0x02); + descr->sl.timestamp_res = avio_rb32(&d->pb); + avio_rb32(&d->pb); + descr->sl.timestamp_len = avio_r8(&d->pb); + descr->sl.ocr_len = avio_r8(&d->pb); + descr->sl.au_len = avio_r8(&d->pb); + descr->sl.inst_bitrate_len = avio_r8(&d->pb); + lengths = avio_rb16(&d->pb); + descr->sl.degr_prior_len = lengths >> 12; + descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f; + descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f; + } else { + av_log_missing_feature(d->s, "Predefined SLConfigDescriptor\n", 0); + } + return 0; +} + +static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len, + int target_tag) { + int tag; + int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag); + update_offsets(&d->pb, &off, &len); + if (len < 0 || len1 > len || len1 <= 0) { + av_log(d->s, AV_LOG_ERROR, "Tag %x length violation new length %d bytes remaining %d\n", tag, len1, len); + return -1; + } + + if (d->level++ >= MAX_LEVEL) { + av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n"); + goto done; + } + + if (target_tag && tag != target_tag) { + av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag, target_tag); + goto done; + } + + switch (tag) { + case MP4IODescrTag: + parse_MP4IODescrTag(d, off, len1); + break; + case MP4ODescrTag: + parse_MP4ODescrTag(d, off, len1); + break; + case MP4ESDescrTag: + parse_MP4ESDescrTag(d, off, len1); + break; + case MP4DecConfigDescrTag: + parse_MP4DecConfigDescrTag(d, off, len1); + break; + case MP4SLDescrTag: + parse_MP4SLDescrTag(d, off, len1); + break; + } + +done: + d->level--; + avio_seek(&d->pb, off + len1, SEEK_SET); + return 0; +} + 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) + Mp4Descr *descr, int *descr_count, int max_descr_count) +{ + MP4DescrParseContext d; + if (init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count) < 0) + return -1; + + parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag); + + *descr_count = d.descr_count; + return 0; +} + +static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size, + Mp4Descr *descr, int *descr_count, int max_descr_count) +{ + MP4DescrParseContext d; + if (init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count) < 0) + return -1; + + parse_mp4_descr_arr(&d, avio_tell(&d.pb), size); + + *descr_count = d.descr_count; + return 0; +} + +static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, int section_len) { + MpegTSContext *ts = filter->u.section_filter.opaque; + SectionHeader h; + const uint8_t *p, *p_end; AVIOContext pb; - int tag; - unsigned len; - - ffio_init_context(&pb, buf, size, 0, NULL, NULL, NULL, NULL); - - len = ff_mp4_read_descr(s, &pb, &tag); - if (tag == MP4IODescrTag) { - avio_rb16(&pb); // ID - avio_r8(&pb); - avio_r8(&pb); - avio_r8(&pb); - avio_r8(&pb); - avio_r8(&pb); - len = ff_mp4_read_descr(s, &pb, &tag); - if (tag == MP4ESDescrTag) { - *es_id = avio_rb16(&pb); /* ES_ID */ - av_dlog(s, "ES_ID %#x\n", *es_id); - avio_r8(&pb); /* priority */ - len = ff_mp4_read_descr(s, &pb, &tag); - if (tag == MP4DecConfigDescrTag) { - *dec_config_descr = av_malloc(len); - if (!*dec_config_descr) - return AVERROR(ENOMEM); - *dec_config_descr_size = len; - avio_read(&pb, *dec_config_descr, len); + Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = {{ 0 }}; + int mp4_descr_count = 0; + int i, pid; + AVFormatContext *s = ts->stream; + + p_end = section + section_len - 4; + p = section; + if (parse_section_header(&h, &p, p_end) < 0) + return; + if (h.tid != M4OD_TID) + return; + + mp4_read_od(s, p, (unsigned)(p_end - p), mp4_descr, &mp4_descr_count, MAX_MP4_DESCR_COUNT); + + for (pid = 0; pid < NB_PID_MAX; pid++) { + if (!ts->pids[pid]) + continue; + for (i = 0; i < mp4_descr_count; i++) { + PESContext *pes; + AVStream *st; + if (ts->pids[pid]->es_id != mp4_descr[i].es_id) + continue; + if (!(ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES)) { + av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid); + continue; + } + pes = ts->pids[pid]->u.pes_filter.opaque; + st = pes->st; + if (!st) { + continue; + } + + pes->sl = mp4_descr[i].sl; + + ffio_init_context(&pb, mp4_descr[i].dec_config_descr, + mp4_descr[i].dec_config_descr_len, 0, NULL, NULL, NULL, NULL); + ff_mp4_read_dec_config_descr(s, st, &pb); + if (st->codec->codec_id == CODEC_ID_AAC && + st->codec->extradata_size > 0) + st->need_parsing = 0; + if (st->codec->codec_id == CODEC_ID_H264 && + st->codec->extradata_size > 0) + st->need_parsing = 0; + + if (st->codec->codec_id <= CODEC_ID_NONE) { + } else if (st->codec->codec_id < CODEC_ID_FIRST_AUDIO) { + st->codec->codec_type = AVMEDIA_TYPE_VIDEO; + } else if (st->codec->codec_id < CODEC_ID_FIRST_SUBTITLE) { + st->codec->codec_type = AVMEDIA_TYPE_AUDIO; + } else if (st->codec->codec_id < CODEC_ID_FIRST_UNKNOWN) { + st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; } } } - return 0; + for (i = 0; i < mp4_descr_count; i++) + av_free(mp4_descr[i].dec_config_descr); } 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) + Mp4Descr *mp4_descr, int mp4_descr_count, int pid, + MpegTSContext *ts) { const uint8_t *desc_end; - int desc_len, desc_tag; + int desc_len, desc_tag, desc_es_id; char language[252]; int i; @@ -920,13 +1262,31 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type mpegts_find_stream_type(st, desc_tag, DESC_types); switch(desc_tag) { + case 0x1E: /* SL descriptor */ + desc_es_id = get16(pp, desc_end); + if (ts && ts->pids[pid]) + ts->pids[pid]->es_id = desc_es_id; + for (i = 0; i < mp4_descr_count; i++) + if (mp4_descr[i].dec_config_descr_len && + mp4_descr[i].es_id == desc_es_id) { + AVIOContext pb; + ffio_init_context(&pb, mp4_descr[i].dec_config_descr, + mp4_descr[i].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; + if (st->codec->codec_id == CODEC_ID_MPEG4SYSTEMS) + mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1); + } + break; 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) { + if (mp4_descr_count > 0 && st->codec->codec_id == CODEC_ID_AAC_LATM && + mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) { AVIOContext pb; - ffio_init_context(&pb, mp4_dec_config_descr, - mp4_dec_config_descr_len, 0, NULL, NULL, NULL, NULL); + ffio_init_context(&pb, mp4_descr->dec_config_descr, + mp4_descr->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) @@ -1010,9 +1370,10 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len int program_info_length, pcr_pid, pid, stream_type; int desc_list_len; uint32_t prog_reg_desc = 0; /* registration descriptor */ - uint8_t *mp4_dec_config_descr = NULL; - int mp4_dec_config_descr_len = 0; - int mp4_es_id = 0; + + Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = {{ 0 }}; + int mp4_descr_count = 0; + int i; av_dlog(ts->stream, "PMT: len %i\n", section_len); hex_dump_debug(ts->stream, (uint8_t *)section, section_len); @@ -1054,8 +1415,8 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len 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); + mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count, + &mp4_descr_count, MAX_MP4_DESCR_COUNT); } else if (tag == 0x05 && len >= 4) { // registration descriptor prog_reg_desc = bytestream_get_le32(&p); len -= 4; @@ -1072,6 +1433,7 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len for(;;) { st = 0; + pes = NULL; stream_type = get8(&p, p_end); if (stream_type < 0) break; @@ -1079,23 +1441,36 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len if (pid < 0) break; - /* now create ffmpeg stream */ + /* now create 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); + if (!pes->st) { + pes->st = avformat_new_stream(pes->stream, NULL); + pes->st->id = pes->pid; + } st = pes->st; - } else { + } else if (stream_type != 0x13) { 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 (pes) { + st = avformat_new_stream(pes->stream, NULL); + st->id = pes->pid; + } + } else { + int idx = ff_find_stream_index(ts->stream, pid); + if (idx >= 0) { + st = ts->stream->streams[idx]; + } else { + st = avformat_new_stream(ts->stream, NULL); + st->id = pid; + st->codec->codec_type = AVMEDIA_TYPE_DATA; + } } if (!st) goto out; - if (!pes->stream_type) + if (pes && !pes->stream_type) mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc); add_pid_to_pmt(ts, h->id, pid); @@ -1110,10 +1485,10 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len break; for(;;) { if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p, desc_list_end, - mp4_dec_config_descr_len, mp4_es_id, pid, mp4_dec_config_descr) < 0) + mp4_descr, mp4_descr_count, pid, ts) < 0) break; - if (prog_reg_desc == AV_RL32("HDMV") && stream_type == 0x83 && pes->sub_st) { + if (pes && 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; } @@ -1122,7 +1497,8 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len } out: - av_free(mp4_dec_config_descr); + for (i = 0; i < mp4_descr_count; i++) + av_free(mp4_descr[i].dec_config_descr); } static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len) @@ -1248,7 +1624,8 @@ static int handle_packet(MpegTSContext *ts, const uint8_t *packet) { AVFormatContext *s = ts->stream; MpegTSFilter *tss; - int len, pid, cc, expected_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; @@ -1264,21 +1641,39 @@ static int handle_packet(MpegTSContext *ts, const uint8_t *packet) 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); - expected_cc = (packet[3] & 0x10) ? (tss->last_cc + 1) & 0x0f : tss->last_cc; - cc_ok = (tss->last_cc < 0) || (expected_cc == 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 */ - return 0; - if (afc == 2) /* adaptation field only */ + if (!has_payload) return 0; - if (afc == 3) { - /* skip adapation field */ + p = packet + 4; + if (has_adaptation) { + /* skip adaptation field */ p += p[0] + 1; } /* if past the end of packet, ignore */ @@ -1356,7 +1751,7 @@ static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size) len = avio_read(pb, buf, TS_PACKET_SIZE); if (len != TS_PACKET_SIZE) return len < 0 ? len : AVERROR_EOF; - /* check paquet sync byte */ + /* check packet sync byte */ if (buf[0] != 0x47) { /* find a new packet start */ avio_seek(pb, -TS_PACKET_SIZE, SEEK_CUR); @@ -1378,7 +1773,24 @@ static int handle_packets(MpegTSContext *ts, int nb_packets) { AVFormatContext *s = ts->stream; 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; @@ -1390,12 +1802,13 @@ static int handle_packets(MpegTSContext *ts, int nb_packets) break; 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) @@ -1466,13 +1879,6 @@ static int mpegts_read_header(AVFormatContext *s, int len; int64_t pos; -#if FF_API_FORMAT_PARAMETERS - if (ap) { - if (ap->mpeg2ts_compute_pcr) - ts->mpeg2ts_compute_pcr = ap->mpeg2ts_compute_pcr; - } -#endif - /* read the first 1024 bytes to get packet size */ pos = avio_tell(pb); len = avio_read(pb, buf, sizeof(buf)); @@ -1487,7 +1893,7 @@ static int mpegts_read_header(AVFormatContext *s, if (s->iformat == &ff_mpegts_demuxer) { /* normal demux */ - /* first do a scaning to get all the services */ + /* first do a scan to get all the services */ if (pb->seekable && avio_seek(pb, pos, SEEK_SET) < 0) av_log(s, AV_LOG_ERROR, "Unable to seek back to the start\n"); @@ -1512,10 +1918,10 @@ static int mpegts_read_header(AVFormatContext *s, /* only read packets */ - st = av_new_stream(s, 0); + st = avformat_new_stream(s, NULL); if (!st) goto fail; - av_set_pts_info(st, 60, 1, 27000000); + avpriv_set_pts_info(st, 60, 1, 27000000); st->codec->codec_type = AVMEDIA_TYPE_DATA; st->codec->codec_id = CODEC_ID_MPEG2TS; @@ -1609,18 +2015,6 @@ static int mpegts_read_packet(AVFormatContext *s, MpegTSContext *ts = s->priv_data; int ret, i; - if (avio_tell(s->pb) != ts->last_pos) { - /* seek detected, flush pes buffer */ - for (i = 0; i < NB_PID_MAX; i++) { - if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) { - PESContext *pes = ts->pids[i]->u.pes_filter.opaque; - av_freep(&pes->buffer); - pes->data_index = 0; - pes->state = MPEGTS_SKIP; /* skip until pes header */ - } - } - } - ts->pkt = pkt; ret = handle_packets(ts, 0); if (ret < 0) { @@ -1638,8 +2032,6 @@ static int mpegts_read_packet(AVFormatContext *s, } } - ts->last_pos = avio_tell(s->pb); - return ret; } @@ -1738,7 +2130,7 @@ static int read_seek2(AVFormatContext *s, ts_adj = target_ts; stream_index_gen_search = stream_index; } - pos = av_gen_search(s, stream_index_gen_search, ts_adj, + pos = ff_gen_search(s, stream_index_gen_search, ts_adj, 0, INT64_MAX, -1, AV_NOPTS_VALUE, AV_NOPTS_VALUE, @@ -1786,7 +2178,7 @@ static int read_seek(AVFormatContext *s, int stream_index, int64_t target_ts, in uint8_t buf[TS_PACKET_SIZE]; int64_t pos; - if(av_seek_frame_binary(s, stream_index, target_ts, flags) < 0) + if (ff_seek_frame_binary(s, stream_index, target_ts, flags) < 0) return -1; pos= avio_tell(s->pb);