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- #include "config_components.h"
- #include "libavutil/buffer.h"
- #include "libavutil/crc.h"
- #include "libavutil/internal.h"
- #include "libavutil/intreadwrite.h"
- #include "libavutil/log.h"
- #include "libavutil/dict.h"
- #include "libavutil/mem.h"
- #include "libavutil/opt.h"
- #include "libavutil/avassert.h"
- #include "libavutil/dovi_meta.h"
- #include "libavcodec/bytestream.h"
- #include "libavcodec/defs.h"
- #include "libavcodec/get_bits.h"
- #include "libavcodec/opus/opus.h"
- #include "avformat.h"
- #include "mpegts.h"
- #include "internal.h"
- #include "avio_internal.h"
- #include "demux.h"
- #include "mpeg.h"
- #include "isom.h"
- #if CONFIG_ICONV
- #include <iconv.h>
- #endif
- #define MAX_RESYNC_SIZE 65536
- #define MAX_MP4_DESCR_COUNT 16
- #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
- do { \
- if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
- (modulus) = (dividend) % (divisor); \
- (prev_dividend) = (dividend); \
- } while (0)
- #define PROBE_PACKET_MAX_BUF 8192
- #define PROBE_PACKET_MARGIN 5
- enum MpegTSFilterType {
- MPEGTS_PES,
- MPEGTS_SECTION,
- MPEGTS_PCR,
- };
- 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 (MpegTSFilter *f, const uint8_t *buf, int len);
- typedef void SetServiceCallback (void *opaque, int ret);
- typedef struct MpegTSSectionFilter {
- int section_index;
- int section_h_size;
- int last_ver;
- unsigned crc;
- unsigned last_crc;
- uint8_t *section_buf;
- unsigned int check_crc : 1;
- unsigned int end_of_section_reached : 1;
- SectionCallback *section_cb;
- void *opaque;
- } MpegTSSectionFilter;
- struct MpegTSFilter {
- int pid;
- int es_id;
- int last_cc;
- int64_t last_pcr;
- int discard;
- enum MpegTSFilterType type;
- union {
- MpegTSPESFilter pes_filter;
- MpegTSSectionFilter section_filter;
- } u;
- };
- struct Stream {
- int idx;
- int stream_identifier;
- };
- #define MAX_STREAMS_PER_PROGRAM 128
- #define MAX_PIDS_PER_PROGRAM (MAX_STREAMS_PER_PROGRAM + 2)
- struct Program {
- unsigned int id;
- unsigned int nb_pids;
- unsigned int pids[MAX_PIDS_PER_PROGRAM];
- unsigned int nb_streams;
- struct Stream streams[MAX_STREAMS_PER_PROGRAM];
-
- int pmt_found;
- };
- struct MpegTSContext {
- const AVClass *class;
-
- AVFormatContext *stream;
-
- int raw_packet_size;
- int64_t pos47_full;
-
- int auto_guess;
-
- int mpeg2ts_compute_pcr;
-
- int fix_teletext_pts;
- int64_t cur_pcr;
- int64_t pcr_incr;
-
-
- int stop_parse;
-
- AVPacket *pkt;
-
- int64_t last_pos;
- int skip_changes;
- int skip_clear;
- int skip_unknown_pmt;
- int scan_all_pmts;
- int resync_size;
- int merge_pmt_versions;
- int max_packet_size;
- int id;
-
-
-
-
- unsigned int nb_prg;
- struct Program *prg;
- int8_t crc_validity[NB_PID_MAX];
-
- MpegTSFilter *pids[NB_PID_MAX];
- int current_pid;
- AVStream *epg_stream;
- AVBufferPool* pools[32];
- };
- #define MPEGTS_OPTIONS \
- { "resync_size", "set size limit for looking up a new synchronization", \
- offsetof(MpegTSContext, resync_size), AV_OPT_TYPE_INT, \
- { .i64 = MAX_RESYNC_SIZE}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, \
- { "ts_id", "transport stream id", \
- offsetof(MpegTSContext, id), AV_OPT_TYPE_INT, \
- { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY }, \
- { "ts_packetsize", "output option carrying the raw packet size", \
- offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT, \
- { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY }
- static const AVOption options[] = {
- MPEGTS_OPTIONS,
- {"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
- {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
- {"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
- {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
- {"skip_unknown_pmt", "skip PMTs for programs not advertised in the PAT", offsetof(MpegTSContext, skip_unknown_pmt), AV_OPT_TYPE_BOOL,
- {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
- {"merge_pmt_versions", "re-use streams when PMT's version/pids change", offsetof(MpegTSContext, merge_pmt_versions), AV_OPT_TYPE_BOOL,
- {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
- {"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
- {.i64 = 0}, 0, 1, 0 },
- {"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
- {.i64 = 0}, 0, 1, 0 },
- {"max_packet_size", "maximum size of emitted packet", offsetof(MpegTSContext, max_packet_size), AV_OPT_TYPE_INT,
- {.i64 = 204800}, 1, INT_MAX/2, AV_OPT_FLAG_DECODING_PARAM },
- { NULL },
- };
- static const AVClass mpegts_class = {
- .class_name = "mpegts demuxer",
- .item_name = av_default_item_name,
- .option = options,
- .version = LIBAVUTIL_VERSION_INT,
- };
- static const AVOption raw_options[] = {
- MPEGTS_OPTIONS,
- { "compute_pcr", "compute exact PCR for each transport stream packet",
- offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
- { .i64 = 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 = raw_options,
- .version = LIBAVUTIL_VERSION_INT,
- };
- enum MpegTSState {
- MPEGTS_HEADER = 0,
- MPEGTS_PESHEADER,
- MPEGTS_PESHEADER_FILL,
- MPEGTS_PAYLOAD,
- MPEGTS_SKIP,
- };
- #define PES_START_SIZE 6
- #define PES_HEADER_SIZE 9
- #define MAX_PES_HEADER_SIZE (9 + 255)
- typedef struct PESContext {
- int pid;
- int pcr_pid;
- int stream_type;
- MpegTSContext *ts;
- AVFormatContext *stream;
- AVStream *st;
- AVStream *sub_st;
- enum MpegTSState state;
-
- int data_index;
- int flags;
- int PES_packet_length;
- int pes_header_size;
- int extended_stream_id;
- uint8_t stream_id;
- int64_t pts, dts;
- int64_t ts_packet_pos;
- uint8_t header[MAX_PES_HEADER_SIZE];
- AVBufferRef *buffer;
- SLConfigDescr sl;
- int merged_st;
- } PESContext;
- extern const FFInputFormat ff_mpegts_demuxer;
- static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
- {
- int i;
- for (i = 0; i < ts->nb_prg; i++) {
- if (ts->prg[i].id == programid) {
- return &ts->prg[i];
- }
- }
- return NULL;
- }
- static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
- {
- AVProgram *prg = NULL;
- int i;
- for (i = 0; i < ts->stream->nb_programs; i++)
- if (ts->stream->programs[i]->id == programid) {
- prg = ts->stream->programs[i];
- break;
- }
- if (!prg)
- return;
- prg->nb_stream_indexes = 0;
- }
- static void clear_program(struct Program *p)
- {
- if (!p)
- return;
- p->nb_pids = 0;
- p->nb_streams = 0;
- p->pmt_found = 0;
- }
- static void clear_programs(MpegTSContext *ts)
- {
- av_freep(&ts->prg);
- ts->nb_prg = 0;
- }
- static struct Program * add_program(MpegTSContext *ts, unsigned int programid)
- {
- struct Program *p = get_program(ts, programid);
- if (p)
- return p;
- if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
- ts->nb_prg = 0;
- return NULL;
- }
- p = &ts->prg[ts->nb_prg];
- p->id = programid;
- clear_program(p);
- ts->nb_prg++;
- return p;
- }
- static void add_pid_to_program(struct Program *p, unsigned int pid)
- {
- int i;
- if (!p)
- return;
- if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
- return;
- for (i = 0; i < p->nb_pids; i++)
- if (p->pids[i] == pid)
- return;
- p->pids[p->nb_pids++] = pid;
- }
- static void update_av_program_info(AVFormatContext *s, unsigned int programid,
- unsigned int pid, int version)
- {
- int i;
- for (i = 0; i < s->nb_programs; i++) {
- AVProgram *program = s->programs[i];
- if (program->id == programid) {
- int old_pcr_pid = program->pcr_pid,
- old_version = program->pmt_version;
- program->pcr_pid = pid;
- program->pmt_version = version;
- if (old_version != -1 && old_version != version) {
- av_log(s, AV_LOG_VERBOSE,
- "detected PMT change (program=%d, version=%d/%d, pcr_pid=0x%x/0x%x)\n",
- programid, old_version, version, old_pcr_pid, pid);
- }
- break;
- }
- }
- }
- static int discard_pid(MpegTSContext *ts, unsigned int pid)
- {
- int i, j, k;
- int used = 0, discarded = 0;
- struct Program *p;
- if (pid == PAT_PID)
- return 0;
-
- for (k = 0; k < ts->stream->nb_programs; k++)
- if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
- break;
- if (k == ts->stream->nb_programs)
- return 0;
- 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;
-
- 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;
- }
- static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
- const uint8_t *buf, int buf_size, int is_start)
- {
- MpegTSSectionFilter *tss = &tss1->u.section_filter;
- uint8_t *cur_section_buf = NULL;
- int len, offset;
- if (is_start) {
- memcpy(tss->section_buf, buf, buf_size);
- tss->section_index = buf_size;
- tss->section_h_size = -1;
- tss->end_of_section_reached = 0;
- } else {
- if (tss->end_of_section_reached)
- return;
- len = MAX_SECTION_SIZE - tss->section_index;
- if (buf_size < len)
- len = buf_size;
- memcpy(tss->section_buf + tss->section_index, buf, len);
- tss->section_index += len;
- }
- offset = 0;
- cur_section_buf = tss->section_buf;
- while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != 0xff) {
-
- if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
- len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
- if (len > MAX_SECTION_SIZE)
- return;
- tss->section_h_size = len;
- }
- if (tss->section_h_size != -1 &&
- tss->section_index >= offset + tss->section_h_size) {
- int crc_valid = 1;
- tss->end_of_section_reached = 1;
- if (tss->check_crc) {
- crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
- if (tss->section_h_size >= 4)
- tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
- if (crc_valid) {
- ts->crc_validity[ tss1->pid ] = 100;
- }else if (ts->crc_validity[ tss1->pid ] > -10) {
- ts->crc_validity[ tss1->pid ]--;
- }else
- crc_valid = 2;
- }
- if (crc_valid) {
- tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
- if (crc_valid != 1)
- tss->last_ver = -1;
- }
- cur_section_buf += tss->section_h_size;
- offset += tss->section_h_size;
- tss->section_h_size = -1;
- } else {
- tss->section_h_size = -1;
- tss->end_of_section_reached = 0;
- break;
- }
- }
- }
- static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
- enum MpegTSFilterType type)
- {
- MpegTSFilter *filter;
- av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
- if (pid >= NB_PID_MAX || ts->pids[pid])
- return NULL;
- filter = av_mallocz(sizeof(MpegTSFilter));
- if (!filter)
- return NULL;
- ts->pids[pid] = filter;
- filter->type = type;
- filter->pid = pid;
- filter->es_id = -1;
- filter->last_cc = -1;
- filter->last_pcr= -1;
- return filter;
- }
- static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
- unsigned int pid,
- SectionCallback *section_cb,
- void *opaque,
- int check_crc)
- {
- MpegTSFilter *filter;
- MpegTSSectionFilter *sec;
- uint8_t *section_buf = av_mallocz(MAX_SECTION_SIZE);
- if (!section_buf)
- return NULL;
- if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION))) {
- av_free(section_buf);
- return NULL;
- }
- sec = &filter->u.section_filter;
- sec->section_cb = section_cb;
- sec->opaque = opaque;
- sec->section_buf = section_buf;
- sec->check_crc = check_crc;
- sec->last_ver = -1;
- return filter;
- }
- static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
- PESCallback *pes_cb,
- void *opaque)
- {
- MpegTSFilter *filter;
- MpegTSPESFilter *pes;
- if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
- return NULL;
- pes = &filter->u.pes_filter;
- pes->pes_cb = pes_cb;
- pes->opaque = opaque;
- return filter;
- }
- static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
- {
- return mpegts_open_filter(ts, pid, MPEGTS_PCR);
- }
- static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
- {
- int pid;
- pid = filter->pid;
- if (filter->type == MPEGTS_SECTION)
- av_freep(&filter->u.section_filter.section_buf);
- else if (filter->type == MPEGTS_PES) {
- PESContext *pes = filter->u.pes_filter.opaque;
- av_buffer_unref(&pes->buffer);
-
- if (!pes->st || pes->merged_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 probe)
- {
- int stat[TS_MAX_PACKET_SIZE];
- int stat_all = 0;
- int i;
- int best_score = 0;
- memset(stat, 0, packet_size * sizeof(*stat));
- for (i = 0; i < size - 3; i++) {
- if (buf[i] == 0x47) {
- int pid = AV_RB16(buf+1) & 0x1FFF;
- int asc = buf[i + 3] & 0x30;
- if (!probe || pid == 0x1FFF || asc) {
- int x = i % packet_size;
- stat[x]++;
- stat_all++;
- if (stat[x] > best_score) {
- best_score = stat[x];
- }
- }
- }
- }
- return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
- }
- static int get_packet_size(AVFormatContext* s)
- {
- int score, fec_score, dvhs_score;
- int margin;
- int ret;
-
- uint8_t buf[PROBE_PACKET_MAX_BUF] = {0};
- int buf_size = 0;
- int max_iterations = 16;
- while (buf_size < PROBE_PACKET_MAX_BUF && max_iterations--) {
- ret = avio_read_partial(s->pb, buf + buf_size, PROBE_PACKET_MAX_BUF - buf_size);
- if (ret < 0)
- return AVERROR_INVALIDDATA;
- buf_size += ret;
- score = analyze(buf, buf_size, TS_PACKET_SIZE, 0);
- dvhs_score = analyze(buf, buf_size, TS_DVHS_PACKET_SIZE, 0);
- fec_score = analyze(buf, buf_size, TS_FEC_PACKET_SIZE, 0);
- av_log(s, AV_LOG_TRACE, "Probe: %d, score: %d, dvhs_score: %d, fec_score: %d \n",
- buf_size, score, dvhs_score, fec_score);
- margin = mid_pred(score, fec_score, dvhs_score);
- if (buf_size < PROBE_PACKET_MAX_BUF)
- margin += PROBE_PACKET_MARGIN;
- if (score > margin)
- return TS_PACKET_SIZE;
- else if (dvhs_score > margin)
- return TS_DVHS_PACKET_SIZE;
- else if (fec_score > margin)
- return TS_FEC_PACKET_SIZE;
- }
- return AVERROR_INVALIDDATA;
- }
- typedef struct SectionHeader {
- uint8_t tid;
- uint16_t id;
- uint8_t version;
- uint8_t current_next;
- uint8_t sec_num;
- uint8_t last_sec_num;
- } SectionHeader;
- static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
- {
- if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
- return 1;
- tssf->last_ver = h->version;
- tssf->last_crc = tssf->crc;
- return 0;
- }
- static inline int get8(const uint8_t **pp, const uint8_t *p_end)
- {
- const uint8_t *p;
- int c;
- p = *pp;
- if (p >= p_end)
- return AVERROR_INVALIDDATA;
- c = *p++;
- *pp = p;
- return c;
- }
- static inline int get16(const uint8_t **pp, const uint8_t *p_end)
- {
- const uint8_t *p;
- int c;
- p = *pp;
- if (1 >= p_end - p)
- return AVERROR_INVALIDDATA;
- c = AV_RB16(p);
- p += 2;
- *pp = p;
- return c;
- }
- static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
- {
- int len;
- const uint8_t *p;
- char *str;
- p = *pp;
- len = get8(&p, p_end);
- if (len < 0)
- return NULL;
- if (len > p_end - p)
- return NULL;
- #if CONFIG_ICONV
- if (len) {
- const char *encodings[] = {
- "ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7",
- "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11",
- "", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "", "", "", "",
- "", "UCS-2BE", "KSC_5601", "GB2312", "UCS-2BE", "UTF-8", "", "",
- "", "", "", "", "", "", "", ""
- };
- iconv_t cd;
- char *in, *out;
- size_t inlen = len, outlen = inlen * 6 + 1;
- if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
- char iso8859[12];
- snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);
- inlen -= 3;
- in = (char *)p + 3;
- cd = iconv_open("UTF-8", iso8859);
- } else if (p[0] < 0x20) {
- inlen -= 1;
- in = (char *)p + 1;
- cd = iconv_open("UTF-8", encodings[*p]);
- } else {
- in = (char *)p;
- cd = iconv_open("UTF-8", encodings[0]);
- }
- if (cd == (iconv_t)-1)
- goto no_iconv;
- str = out = av_malloc(outlen);
- if (!str) {
- iconv_close(cd);
- return NULL;
- }
- if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
- iconv_close(cd);
- av_freep(&str);
- goto no_iconv;
- }
- iconv_close(cd);
- *out = 0;
- *pp = p + len;
- return str;
- }
- no_iconv:
- #endif
- str = av_malloc(len + 1);
- if (!str)
- return NULL;
- memcpy(str, p, len);
- str[len] = '\0';
- p += len;
- *pp = p;
- return str;
- }
- static int parse_section_header(SectionHeader *h,
- const uint8_t **pp, const uint8_t *p_end)
- {
- int val;
- val = get8(pp, p_end);
- if (val < 0)
- return val;
- h->tid = val;
- *pp += 2;
- val = get16(pp, p_end);
- if (val < 0)
- return val;
- h->id = val;
- val = get8(pp, p_end);
- if (val < 0)
- return val;
- h->version = (val >> 1) & 0x1f;
- h->current_next = val & 0x01;
- val = get8(pp, p_end);
- if (val < 0)
- return val;
- h->sec_num = val;
- val = get8(pp, p_end);
- if (val < 0)
- return val;
- h->last_sec_num = val;
- return 0;
- }
- typedef struct StreamType {
- uint32_t stream_type;
- enum AVMediaType codec_type;
- enum AVCodecID codec_id;
- } StreamType;
- static const StreamType ISO_types[] = {
- { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
- { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
- { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
- { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
- { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
- { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
-
- #if !CONFIG_LOAS_DEMUXER
- { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM },
- #endif
- { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
- { 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
- { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
- { 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
- { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
- { 0x33, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VVC },
- { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
- { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
- { 0xd2, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS2 },
- { 0xd4, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS3 },
- { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
- { 0 },
- };
- static const StreamType HDMV_types[] = {
- { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
- { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
- { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
- { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
- { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
- { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
- { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
- { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
- { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
- { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
- { 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
- { 0 },
- };
- static const StreamType SCTE_types[] = {
- { 0x86, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
- { 0 },
- };
- static const StreamType MISC_types[] = {
- { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
- { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
- { 0 },
- };
- static const StreamType HLS_SAMPLE_ENC_types[] = {
- { 0xdb, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264},
- { 0xcf, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
- { 0xc1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
- { 0xc2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3},
- { 0 },
- };
- static const StreamType REGD_types[] = {
- { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
- { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
- { MKTAG('A', 'C', '-', '4'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC4 },
- { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
- { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
- { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
- { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
- { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
- { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
- { MKTAG('V', 'V', 'C', ' '), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VVC },
- { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
- { MKTAG('V', 'A', 'N', 'C'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_2038 },
- { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
- { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
- { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
- { 0 },
- };
- static const StreamType METADATA_types[] = {
- { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
- { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
- { 0 },
- };
- static const StreamType DESC_types[] = {
- { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
- { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
- { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
- { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
- { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE },
- { 0 },
- };
- static void mpegts_find_stream_type(AVStream *st,
- uint32_t stream_type,
- const StreamType *types)
- {
- FFStream *const sti = ffstream(st);
- for (; types->stream_type; types++)
- if (stream_type == types->stream_type) {
- if (st->codecpar->codec_type != types->codec_type ||
- st->codecpar->codec_id != types->codec_id) {
- st->codecpar->codec_type = types->codec_type;
- st->codecpar->codec_id = types->codec_id;
- sti->need_context_update = 1;
- }
- sti->request_probe = 0;
- return;
- }
- }
- static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
- uint32_t stream_type, uint32_t prog_reg_desc)
- {
- FFStream *const sti = ffstream(st);
- int old_codec_type = st->codecpar->codec_type;
- int old_codec_id = st->codecpar->codec_id;
- int old_codec_tag = st->codecpar->codec_tag;
- avpriv_set_pts_info(st, 33, 1, 90000);
- st->priv_data = pes;
- st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
- st->codecpar->codec_id = AV_CODEC_ID_NONE;
- sti->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->codecpar->codec_tag = pes->stream_type;
- mpegts_find_stream_type(st, pes->stream_type, ISO_types);
- if (pes->stream_type == 4 || pes->stream_type == 0x0f)
- sti->request_probe = 50;
- if ((prog_reg_desc == AV_RL32("HDMV") ||
- prog_reg_desc == AV_RL32("HDPR")) &&
- st->codecpar->codec_id == AV_CODEC_ID_NONE) {
- mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
- if (pes->stream_type == 0x83) {
-
-
- AVStream *sub_st;
-
- PESContext *sub_pes = av_memdup(pes, sizeof(*sub_pes));
- if (!sub_pes)
- return AVERROR(ENOMEM);
- sub_st = avformat_new_stream(pes->stream, NULL);
- if (!sub_st) {
- av_free(sub_pes);
- return AVERROR(ENOMEM);
- }
- sub_st->id = pes->pid;
- avpriv_set_pts_info(sub_st, 33, 1, 90000);
- sub_st->priv_data = sub_pes;
- sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
- sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
- ffstream(sub_st)->need_parsing = AVSTREAM_PARSE_FULL;
- sub_pes->sub_st = pes->sub_st = sub_st;
- }
- }
- if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
- mpegts_find_stream_type(st, pes->stream_type, MISC_types);
- if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
- mpegts_find_stream_type(st, pes->stream_type, HLS_SAMPLE_ENC_types);
- if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
- st->codecpar->codec_id = old_codec_id;
- st->codecpar->codec_type = old_codec_type;
- }
- if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
- (sti->request_probe > 0 && sti->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
- sti->probe_packets > 0 &&
- stream_type == STREAM_TYPE_PRIVATE_DATA) {
- st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
- st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
- sti->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
- }
-
- if (old_codec_type != st->codecpar->codec_type ||
- old_codec_id != st->codecpar->codec_id ||
- old_codec_tag != st->codecpar->codec_tag)
- sti->need_context_update = 1;
- return 0;
- }
- static void reset_pes_packet_state(PESContext *pes)
- {
- pes->pts = AV_NOPTS_VALUE;
- pes->dts = AV_NOPTS_VALUE;
- pes->data_index = 0;
- pes->flags = 0;
- av_buffer_unref(&pes->buffer);
- }
- static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
- {
- av_packet_unref(pkt);
- pkt->data = (uint8_t *)buffer;
- pkt->size = len;
- }
- static int new_pes_packet(PESContext *pes, AVPacket *pkt)
- {
- uint8_t *sd;
- av_packet_unref(pkt);
- pkt->buf = pes->buffer;
- pkt->data = pes->buffer->data;
- pkt->size = pes->data_index;
- if (pes->PES_packet_length &&
- pes->pes_header_size + pes->data_index != pes->PES_packet_length +
- 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, AV_INPUT_BUFFER_PADDING_SIZE);
-
- 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;
-
- pkt->pos = pes->ts_packet_pos;
- pkt->flags = pes->flags;
- pes->buffer = NULL;
- reset_pes_packet_state(pes);
- sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
- if (!sd)
- return AVERROR(ENOMEM);
- *sd = pes->stream_id;
- return 0;
- }
- static uint64_t get_ts64(GetBitContext *gb, int bits)
- {
- if (get_bits_left(gb) < bits)
- return AV_NOPTS_VALUE;
- return get_bits64(gb, bits);
- }
- 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;
- uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
- int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
- memcpy(buf_padded, buf, buf_padded_size);
- init_get_bits(&gb, buf_padded, buf_padded_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_ts64(&gb, sl->timestamp_len);
- if (cts_flag == 1)
- cts = get_ts64(&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;
- }
- static AVBufferRef *buffer_pool_get(MpegTSContext *ts, int size)
- {
- int index = av_log2(size + AV_INPUT_BUFFER_PADDING_SIZE);
- if (!ts->pools[index]) {
- int pool_size = FFMIN(ts->max_packet_size + AV_INPUT_BUFFER_PADDING_SIZE, 2 << index);
- ts->pools[index] = av_buffer_pool_init(pool_size, NULL);
- if (!ts->pools[index])
- return NULL;
- }
- return av_buffer_pool_get(ts->pools[index]);
- }
- 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 ret, len;
- if (!ts->pkt)
- return 0;
- if (is_start) {
- if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
- ret = new_pes_packet(pes, ts->pkt);
- if (ret < 0)
- return ret;
- ts->stop_parse = 1;
- } else {
- reset_pes_packet_state(pes);
- }
- pes->state = MPEGTS_HEADER;
- 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) {
-
- if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
- pes->header[2] == 0x01) {
-
- pes->stream_id = pes->header[3];
- av_log(pes->stream, AV_LOG_TRACE, "pid=%x stream_id=%#x\n", pes->pid, pes->stream_id);
- if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
- (!pes->sub_st ||
- pes->sub_st->discard == AVDISCARD_ALL)) ||
- pes->stream_id == STREAM_ID_PADDING_STREAM)
- goto skip;
-
- if (!pes->st) {
- if (ts->skip_changes)
- goto skip;
- if (ts->merge_pmt_versions)
- goto skip;
- 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);
- }
- pes->PES_packet_length = AV_RB16(pes->header + 4);
-
- if (pes->stream_id != STREAM_ID_PROGRAM_STREAM_MAP &&
- pes->stream_id != STREAM_ID_PRIVATE_STREAM_2 &&
- pes->stream_id != STREAM_ID_ECM_STREAM &&
- pes->stream_id != STREAM_ID_EMM_STREAM &&
- pes->stream_id != STREAM_ID_PROGRAM_STREAM_DIRECTORY &&
- pes->stream_id != STREAM_ID_DSMCC_STREAM &&
- pes->stream_id != STREAM_ID_TYPE_E_STREAM) {
- FFStream *const pes_sti = ffstream(pes->st);
- pes->state = MPEGTS_PESHEADER;
- if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes_sti->request_probe) {
- av_log(pes->stream, AV_LOG_TRACE,
- "pid=%x stream_type=%x probing\n",
- pes->pid,
- pes->stream_type);
- pes_sti->request_probe = 1;
- }
- } else {
- pes->pes_header_size = 6;
- pes->state = MPEGTS_PAYLOAD;
- pes->data_index = 0;
- }
- } else {
-
-
- skip:
- pes->state = MPEGTS_SKIP;
- continue;
- }
- }
- break;
-
-
- case MPEGTS_PESHEADER:
- len = PES_HEADER_SIZE - pes->data_index;
- if (len < 0)
- return AVERROR_INVALIDDATA;
- 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 AVERROR_INVALIDDATA;
- 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_ext = *r++;
-
- skip = (pes_ext >> 4) & 0xb;
- skip += skip & 0x9;
- r += skip;
- if ((pes_ext & 0x41) == 0x01 &&
- (r + 2) <= (pes->header + pes->pes_header_size)) {
-
- if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
- pes->extended_stream_id = r[1];
- }
- }
-
- pes->state = MPEGTS_PAYLOAD;
- pes->data_index = 0;
- if (pes->stream_type == 0x12 && buf_size > 0) {
- 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;
- }
- if (pes->stream_type == STREAM_TYPE_METADATA &&
- pes->stream_id == STREAM_ID_METADATA_STREAM &&
- pes->st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV &&
- buf_size >= 5) {
-
- pes->pes_header_size += 5;
- p += 5;
- buf_size -= 5;
- }
- if ( pes->ts->fix_teletext_pts
- && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
- || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
- ) {
- AVProgram *p = NULL;
- int pcr_found = 0;
- while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
- if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
- MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
- if (f) {
- AVStream *st = NULL;
- if (f->type == MPEGTS_PES) {
- PESContext *pcrpes = f->u.pes_filter.opaque;
- if (pcrpes)
- st = pcrpes->st;
- } else if (f->type == MPEGTS_PCR) {
- int i;
- for (i = 0; i < p->nb_stream_indexes; i++) {
- AVStream *pst = pes->stream->streams[p->stream_index[i]];
- if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
- st = pst;
- }
- }
- if (f->last_pcr != -1 && !f->discard) {
-
-
-
-
- int64_t pcr = f->last_pcr / 300;
- pcr_found = 1;
- if (st) {
- const FFStream *const sti = ffstream(st);
- FFStream *const pes_sti = ffstream(pes->st);
- pes_sti->pts_wrap_reference = sti->pts_wrap_reference;
- pes_sti->pts_wrap_behavior = sti->pts_wrap_behavior;
- }
- if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
- pes->pts = pes->dts = pcr;
- } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
- pes->dts > pcr + 3654 + 9000) {
- pes->pts = pes->dts = pcr + 3654 + 9000;
- } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
- pes->dts > pcr + 10*90000) {
- pes->pts = pes->dts = pcr + 3654 + 9000;
- }
- break;
- }
- }
- }
- }
- if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
- !pcr_found) {
- av_log(pes->stream, AV_LOG_VERBOSE,
- "Forcing DTS/PTS to be unset for a "
- "non-trustworthy PES packet for PID %d as "
- "PCR hasn't been received yet.\n",
- pes->pid);
- pes->dts = pes->pts = AV_NOPTS_VALUE;
- }
- }
- }
- break;
- case MPEGTS_PAYLOAD:
- do {
- int max_packet_size = ts->max_packet_size;
- if (pes->PES_packet_length && pes->PES_packet_length + PES_START_SIZE > pes->pes_header_size)
- max_packet_size = pes->PES_packet_length + PES_START_SIZE - pes->pes_header_size;
- if (pes->data_index > 0 &&
- pes->data_index + buf_size > max_packet_size) {
- ret = new_pes_packet(pes, ts->pkt);
- if (ret < 0)
- return ret;
- pes->PES_packet_length = 0;
- max_packet_size = ts->max_packet_size;
- ts->stop_parse = 1;
- } else if (pes->data_index == 0 &&
- buf_size > max_packet_size) {
-
-
- buf_size = max_packet_size;
- }
- if (!pes->buffer) {
- pes->buffer = buffer_pool_get(ts, max_packet_size);
- if (!pes->buffer)
- return AVERROR(ENOMEM);
- }
- memcpy(pes->buffer->data + pes->data_index, p, buf_size);
- pes->data_index += buf_size;
-
- if (!ts->stop_parse && pes->PES_packet_length &&
- pes->pes_header_size + pes->data_index == pes->PES_packet_length + PES_START_SIZE) {
- ts->stop_parse = 1;
- ret = new_pes_packet(pes, ts->pkt);
- pes->state = MPEGTS_SKIP;
- if (ret < 0)
- return ret;
- }
- } while (0);
- 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)
- {
- MpegTSFilter *tss;
- PESContext *pes;
-
- 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;
- }
- #define MAX_LEVEL 4
- typedef struct MP4DescrParseContext {
- AVFormatContext *s;
- FFIOContext pb;
- Mp4Descr *descr;
- Mp4Descr *active_descr;
- int descr_count;
- int max_descr_count;
- int level;
- int predefined_SLConfigDescriptor_seen;
- } MP4DescrParseContext;
- static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
- const uint8_t *buf, unsigned size,
- Mp4Descr *descr, int max_descr_count)
- {
- if (size > (1 << 30))
- return AVERROR_INVALIDDATA;
- ffio_init_read_context(&d->pb, buf, size);
- 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) {
- int ret = parse_mp4_descr(d, off, len, 0);
- if (ret < 0)
- return ret;
- update_offsets(&d->pb.pub, &off, &len);
- }
- return 0;
- }
- static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
- {
- AVIOContext *const pb = &d->pb.pub;
- avio_rb16(pb);
- avio_r8(pb);
- avio_r8(pb);
- avio_r8(pb);
- avio_r8(pb);
- avio_r8(pb);
- update_offsets(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.pub);
- if (!(id_flags & 0x0020)) {
- update_offsets(&d->pb.pub, &off, &len);
- return parse_mp4_descr_arr(d, off, len);
- } else {
- return 0;
- }
- }
- static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
- {
- AVIOContext *const pb = &d->pb.pub;
- int es_id = 0;
- int ret = 0;
- if (d->descr_count >= d->max_descr_count)
- return AVERROR_INVALIDDATA;
- ff_mp4_parse_es_descr(pb, &es_id);
- d->active_descr = d->descr + (d->descr_count++);
- d->active_descr->es_id = es_id;
- update_offsets(pb, &off, &len);
- if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
- return ret;
- update_offsets(pb, &off, &len);
- if (len > 0)
- ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
- d->active_descr = NULL;
- return ret;
- }
- static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
- int len)
- {
- Mp4Descr *descr = d->active_descr;
- if (!descr)
- return AVERROR_INVALIDDATA;
- 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.pub, descr->dec_config_descr, len);
- return 0;
- }
- static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
- {
- Mp4Descr *descr = d->active_descr;
- AVIOContext *const pb = &d->pb.pub;
- int predefined;
- if (!descr)
- return AVERROR_INVALIDDATA;
- #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
- descr->sl.dst = avio_r8(pb); \
- if (descr->sl.dst > maxv) { \
- descr->sl.dst = maxv; \
- return AVERROR_INVALIDDATA; \
- } \
- } while (0)
- predefined = avio_r8(pb);
- if (!predefined) {
- int lengths;
- int flags = avio_r8(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(pb);
- avio_rb32(pb);
- R8_CHECK_CLIP_MAX(timestamp_len, 63);
- R8_CHECK_CLIP_MAX(ocr_len, 63);
- R8_CHECK_CLIP_MAX(au_len, 31);
- descr->sl.inst_bitrate_len = avio_r8(pb);
- lengths = avio_rb16(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 if (!d->predefined_SLConfigDescriptor_seen){
- avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
- d->predefined_SLConfigDescriptor_seen = 1;
- }
- return 0;
- }
- static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
- int target_tag)
- {
- int tag;
- AVIOContext *const pb = &d->pb.pub;
- int len1 = ff_mp4_read_descr(d->s, pb, &tag);
- int ret = 0;
- update_offsets(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 AVERROR_INVALIDDATA;
- }
- if (d->level++ >= MAX_LEVEL) {
- av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
- ret = AVERROR_INVALIDDATA;
- goto done;
- }
- if (target_tag && tag != target_tag) {
- av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
- target_tag);
- ret = AVERROR_INVALIDDATA;
- goto done;
- }
- switch (tag) {
- case MP4IODescrTag:
- ret = parse_MP4IODescrTag(d, off, len1);
- break;
- case MP4ODescrTag:
- ret = parse_MP4ODescrTag(d, off, len1);
- break;
- case MP4ESDescrTag:
- ret = parse_MP4ESDescrTag(d, off, len1);
- break;
- case MP4DecConfigDescrTag:
- ret = parse_MP4DecConfigDescrTag(d, off, len1);
- break;
- case MP4SLDescrTag:
- ret = parse_MP4SLDescrTag(d, off, len1);
- break;
- }
- done:
- d->level--;
- avio_seek(pb, off + len1, SEEK_SET);
- return ret;
- }
- static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
- Mp4Descr *descr, int *descr_count, int max_descr_count)
- {
- MP4DescrParseContext d;
- int ret;
- d.predefined_SLConfigDescriptor_seen = 0;
- ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
- if (ret < 0)
- return ret;
- ret = parse_mp4_descr(&d, avio_tell(&d.pb.pub), size, MP4IODescrTag);
- *descr_count = d.descr_count;
- return ret;
- }
- static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
- Mp4Descr *descr, int *descr_count, int max_descr_count)
- {
- MP4DescrParseContext d;
- int ret;
- ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
- if (ret < 0)
- return ret;
- ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb.pub), size);
- *descr_count = d.descr_count;
- return ret;
- }
- static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
- int section_len)
- {
- MpegTSContext *ts = filter->u.section_filter.opaque;
- MpegTSSectionFilter *tssf = &filter->u.section_filter;
- SectionHeader h;
- const uint8_t *p, *p_end;
- int mp4_descr_count = 0;
- Mp4Descr mp4_descr[MAX_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;
- if (skip_identical(&h, tssf))
- 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;
- FFStream *sti;
- FFIOContext pb;
- if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
- continue;
- if (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;
- sti = ffstream(st);
- pes->sl = mp4_descr[i].sl;
- ffio_init_read_context(&pb, mp4_descr[i].dec_config_descr,
- mp4_descr[i].dec_config_descr_len);
- ff_mp4_read_dec_config_descr(s, st, &pb.pub);
- if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
- st->codecpar->extradata_size > 0)
- sti->need_parsing = 0;
- if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
- st->codecpar->extradata_size > 0)
- sti->need_parsing = 0;
- st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
- sti->need_context_update = 1;
- }
- }
- for (i = 0; i < mp4_descr_count; i++)
- av_free(mp4_descr[i].dec_config_descr);
- }
- static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
- int section_len)
- {
- AVProgram *prg = NULL;
- MpegTSContext *ts = filter->u.section_filter.opaque;
- int idx = ff_find_stream_index(ts->stream, filter->pid);
- if (idx < 0)
- return;
-
- if (!ts->pkt)
- return;
- new_data_packet(section, section_len, ts->pkt);
- ts->pkt->stream_index = idx;
- prg = av_find_program_from_stream(ts->stream, NULL, idx);
- if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
- MpegTSFilter *f = ts->pids[prg->pcr_pid];
- if (f && f->last_pcr != -1)
- ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
- }
- ts->stop_parse = 1;
- }
- static const uint8_t opus_coupled_stream_cnt[9] = {
- 1, 0, 1, 1, 2, 2, 2, 3, 3
- };
- static const uint8_t opus_stream_cnt[9] = {
- 1, 1, 1, 2, 2, 3, 4, 4, 5,
- };
- static const uint8_t opus_channel_map[8][8] = {
- { 0 },
- { 0,1 },
- { 0,2,1 },
- { 0,1,2,3 },
- { 0,4,1,2,3 },
- { 0,4,1,2,3,5 },
- { 0,4,1,2,3,5,6 },
- { 0,6,1,2,3,4,5,7 },
- };
- int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
- const uint8_t **pp, const uint8_t *desc_list_end,
- Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
- MpegTSContext *ts)
- {
- FFStream *const sti = ffstream(st);
- const uint8_t *desc_end;
- int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
- char language[252];
- int i;
- desc_tag = get8(pp, desc_list_end);
- if (desc_tag < 0)
- return AVERROR_INVALIDDATA;
- desc_len = get8(pp, desc_list_end);
- if (desc_len < 0)
- return AVERROR_INVALIDDATA;
- desc_end = *pp + desc_len;
- if (desc_end > desc_list_end)
- return AVERROR_INVALIDDATA;
- av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
- if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) &&
- stream_type == STREAM_TYPE_PRIVATE_DATA)
- mpegts_find_stream_type(st, desc_tag, DESC_types);
- switch (desc_tag) {
- case VIDEO_STREAM_DESCRIPTOR:
- if (get8(pp, desc_end) & 0x1) {
- st->disposition |= AV_DISPOSITION_STILL_IMAGE;
- }
- break;
- case SL_DESCRIPTOR:
- desc_es_id = get16(pp, desc_end);
- if (desc_es_id < 0)
- break;
- 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) {
- FFIOContext pb;
- ffio_init_read_context(&pb, mp4_descr[i].dec_config_descr,
- mp4_descr[i].dec_config_descr_len);
- ff_mp4_read_dec_config_descr(fc, st, &pb.pub);
- if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
- st->codecpar->extradata_size > 0) {
- sti->need_parsing = 0;
- sti->need_context_update = 1;
- }
- if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
- mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
- }
- break;
- case FMC_DESCRIPTOR:
- if (get16(pp, desc_end) < 0)
- break;
- if (mp4_descr_count > 0 &&
- (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
- (sti->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
- sti->request_probe > 0) &&
- mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
- FFIOContext pb;
- ffio_init_read_context(&pb, mp4_descr->dec_config_descr,
- mp4_descr->dec_config_descr_len);
- ff_mp4_read_dec_config_descr(fc, st, &pb.pub);
- if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
- st->codecpar->extradata_size > 0) {
- sti->request_probe = sti->need_parsing = 0;
- st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
- sti->need_context_update = 1;
- }
- }
- break;
- case 0x56:
- {
- uint8_t *extradata = NULL;
- int language_count = desc_len / 5, ret;
- if (desc_len > 0 && desc_len % 5 != 0)
- return AVERROR_INVALIDDATA;
- if (language_count > 0) {
-
- av_assert0(language_count <= sizeof(language) / 4);
- if (st->codecpar->extradata == NULL) {
- ret = ff_alloc_extradata(st->codecpar, language_count * 2);
- if (ret < 0)
- return ret;
- }
- if (st->codecpar->extradata_size < language_count * 2)
- return AVERROR_INVALIDDATA;
- extradata = st->codecpar->extradata;
- for (i = 0; i < language_count; i++) {
- language[i * 4 + 0] = get8(pp, desc_end);
- language[i * 4 + 1] = get8(pp, desc_end);
- language[i * 4 + 2] = get8(pp, desc_end);
- language[i * 4 + 3] = ',';
- memcpy(extradata, *pp, 2);
- extradata += 2;
- *pp += 2;
- }
- language[i * 4 - 1] = 0;
- av_dict_set(&st->metadata, "language", language, 0);
- sti->need_context_update = 1;
- }
- }
- break;
- case 0x59:
- {
-
- int language_count = desc_len / 8, ret;
- if (desc_len > 0 && desc_len % 8 != 0)
- return AVERROR_INVALIDDATA;
- if (language_count > 1) {
- avpriv_request_sample(fc, "DVB subtitles with multiple languages");
- }
- if (language_count > 0) {
- uint8_t *extradata;
-
- av_assert0(language_count <= sizeof(language) / 4);
- if (st->codecpar->extradata == NULL) {
- ret = ff_alloc_extradata(st->codecpar, language_count * 5);
- if (ret < 0)
- return ret;
- }
- if (st->codecpar->extradata_size < language_count * 5)
- return AVERROR_INVALIDDATA;
- extradata = st->codecpar->extradata;
- for (i = 0; i < language_count; i++) {
- language[i * 4 + 0] = get8(pp, desc_end);
- language[i * 4 + 1] = get8(pp, desc_end);
- language[i * 4 + 2] = get8(pp, desc_end);
- language[i * 4 + 3] = ',';
-
- switch (*pp[0]) {
- case 0x20:
- case 0x21:
- case 0x22:
- case 0x23:
- case 0x24:
- case 0x25:
- st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
- break;
- }
- extradata[4] = get8(pp, desc_end);
- memcpy(extradata, *pp, 4);
- extradata += 5;
- *pp += 4;
- }
- language[i * 4 - 1] = 0;
- av_dict_set(&st->metadata, "language", language, 0);
- sti->need_context_update = 1;
- }
- }
- break;
- case 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;
- st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
- break;
- }
- }
- if (i && language[0]) {
- language[i - 1] = 0;
-
- av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
- }
- break;
- case REGISTRATION_DESCRIPTOR:
- st->codecpar->codec_tag = bytestream_get_le32(pp);
- av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
- if (st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) {
- mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
- if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
- sti->request_probe = 50;
- }
- break;
- case 0x52:
- sti->stream_identifier = 1 + get8(pp, desc_end);
- break;
- case METADATA_DESCRIPTOR:
- if (get16(pp, desc_end) == 0xFFFF)
- *pp += 4;
- if (get8(pp, desc_end) == 0xFF) {
- st->codecpar->codec_tag = bytestream_get_le32(pp);
- if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
- mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
- }
- break;
- case 0x7f:
- ext_desc_tag = get8(pp, desc_end);
- if (ext_desc_tag < 0)
- return AVERROR_INVALIDDATA;
- if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
- ext_desc_tag == 0x80) {
- if (!st->codecpar->extradata) {
- st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
- AV_INPUT_BUFFER_PADDING_SIZE);
- if (!st->codecpar->extradata)
- return AVERROR(ENOMEM);
- st->codecpar->extradata_size = sizeof(opus_default_extradata);
- memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
- channel_config_code = get8(pp, desc_end);
- if (channel_config_code < 0)
- return AVERROR_INVALIDDATA;
- if (channel_config_code <= 0x8) {
- st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
- AV_WL32(&st->codecpar->extradata[12], 48000);
- st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : 255;
- st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
- st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
- memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
- st->codecpar->extradata_size = st->codecpar->extradata[18] ? 21 + channels : 19;
- } else {
- avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
- }
- sti->need_parsing = AVSTREAM_PARSE_FULL;
- sti->need_context_update = 1;
- }
- }
- if (ext_desc_tag == 0x06) {
- int flags;
- if (desc_len < 1)
- return AVERROR_INVALIDDATA;
- flags = get8(pp, desc_end);
- if ((flags & 0x80) == 0)
- st->disposition |= AV_DISPOSITION_DEPENDENT;
- switch ((flags >> 2) & 0x1F) {
- case 0x01:
- st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
- st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
- break;
- case 0x02:
- st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
- break;
- case 0x03:
- st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
- break;
- }
- if (flags & 0x01) {
- if (desc_len < 4)
- return AVERROR_INVALIDDATA;
- language[0] = get8(pp, desc_end);
- language[1] = get8(pp, desc_end);
- language[2] = get8(pp, desc_end);
- language[3] = 0;
-
- if (language[0])
- av_dict_set(&st->metadata, "language", language, 0);
- }
- }
- break;
- case 0x6a:
- {
- int component_type_flag = get8(pp, desc_end) & (1 << 7);
- if (component_type_flag) {
- int component_type = get8(pp, desc_end);
- int service_type_mask = 0x38;
- int service_type = ((component_type & service_type_mask) >> 3);
- if (service_type == 0x02 ) {
- st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
- av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
- }
- }
- }
- break;
- case 0x7a:
- {
- int component_type_flag = get8(pp, desc_end) & (1 << 7);
- if (component_type_flag) {
- int component_type = get8(pp, desc_end);
- int service_type_mask = 0x38;
- int service_type = ((component_type & service_type_mask) >> 3);
- if (service_type == 0x02 ) {
- st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
- av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
- }
- }
- }
- break;
- case 0xfd:
-
-
- if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
-
-
-
-
-
- int actual_component_tag = sti->stream_identifier - 1;
- int picked_profile = AV_PROFILE_UNKNOWN;
- int data_component_id = get16(pp, desc_end);
- if (data_component_id < 0)
- return AVERROR_INVALIDDATA;
- switch (data_component_id) {
- case 0x0008:
-
-
- if (actual_component_tag >= 0x30 &&
- actual_component_tag <= 0x37) {
- picked_profile = AV_PROFILE_ARIB_PROFILE_A;
- }
- break;
- case 0x0012:
-
-
- if (actual_component_tag == 0x87) {
- picked_profile = AV_PROFILE_ARIB_PROFILE_C;
- }
- break;
- default:
- break;
- }
- if (picked_profile == AV_PROFILE_UNKNOWN)
- break;
- st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
- st->codecpar->codec_id = AV_CODEC_ID_ARIB_CAPTION;
- if (st->codecpar->profile != picked_profile) {
- st->codecpar->profile = picked_profile;
- sti->need_context_update = 1;
- }
- sti->request_probe = 0;
- sti->need_parsing = 0;
- }
- break;
- case 0xb0:
- {
- uint32_t buf;
- AVDOVIDecoderConfigurationRecord *dovi;
- size_t dovi_size;
- int dependency_pid = -1;
- if (desc_end - *pp < 4)
- return AVERROR_INVALIDDATA;
- dovi = av_dovi_alloc(&dovi_size);
- if (!dovi)
- return AVERROR(ENOMEM);
- dovi->dv_version_major = get8(pp, desc_end);
- dovi->dv_version_minor = get8(pp, desc_end);
- buf = get16(pp, desc_end);
- dovi->dv_profile = (buf >> 9) & 0x7f;
- dovi->dv_level = (buf >> 3) & 0x3f;
- dovi->rpu_present_flag = (buf >> 2) & 0x01;
- dovi->el_present_flag = (buf >> 1) & 0x01;
- dovi->bl_present_flag = buf & 0x01;
- if (!dovi->bl_present_flag && desc_end - *pp >= 2) {
- buf = get16(pp, desc_end);
- dependency_pid = buf >> 3;
- }
- if (desc_end - *pp >= 1) {
- buf = get8(pp, desc_end);
- dovi->dv_bl_signal_compatibility_id = (buf >> 4) & 0x0f;
- dovi->dv_md_compression = (buf >> 2) & 0x03;
- } else {
-
-
- dovi->dv_bl_signal_compatibility_id = 0;
- dovi->dv_md_compression = AV_DOVI_COMPRESSION_NONE;
- }
- if (!av_packet_side_data_add(&st->codecpar->coded_side_data,
- &st->codecpar->nb_coded_side_data,
- AV_PKT_DATA_DOVI_CONF,
- (uint8_t *)dovi, dovi_size, 0)) {
- av_free(dovi);
- return AVERROR(ENOMEM);
- }
- av_log(fc, AV_LOG_TRACE, "DOVI, version: %d.%d, profile: %d, level: %d, "
- "rpu flag: %d, el flag: %d, bl flag: %d, dependency_pid: %d, "
- "compatibility id: %d, compression: %d\n",
- dovi->dv_version_major, dovi->dv_version_minor,
- dovi->dv_profile, dovi->dv_level,
- dovi->rpu_present_flag,
- dovi->el_present_flag,
- dovi->bl_present_flag,
- dependency_pid,
- dovi->dv_bl_signal_compatibility_id,
- dovi->dv_md_compression);
- }
- break;
- default:
- break;
- }
- *pp = desc_end;
- return 0;
- }
- static AVStream *find_matching_stream(MpegTSContext *ts, int pid, unsigned int programid,
- int stream_identifier, int pmt_stream_idx, struct Program *p)
- {
- AVFormatContext *s = ts->stream;
- AVStream *found = NULL;
- if (stream_identifier) {
- for (int i = 0; i < p->nb_streams; i++) {
- if (p->streams[i].stream_identifier == stream_identifier)
- if (!found || pmt_stream_idx == i)
- found = s->streams[p->streams[i].idx];
- }
- } else if (pmt_stream_idx < p->nb_streams) {
- found = s->streams[p->streams[pmt_stream_idx].idx];
- }
- if (found) {
- av_log(ts->stream, AV_LOG_VERBOSE,
- "re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
- av_get_media_type_string(found->codecpar->codec_type),
- found->index, found->id, pid);
- }
- return found;
- }
- static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
- {
- const uint8_t **pp = &p;
- const uint8_t *desc_list_end;
- const uint8_t *desc_end;
- int desc_list_len;
- int desc_len, desc_tag;
- desc_list_len = get16(pp, p_end);
- if (desc_list_len < 0)
- return -1;
- desc_list_len &= 0xfff;
- desc_list_end = p + desc_list_len;
- if (desc_list_end > p_end)
- return -1;
- while (1) {
- 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;
- if (desc_tag == 0x52) {
- return get8(pp, desc_end);
- }
- *pp = desc_end;
- }
- return -1;
- }
- static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
- {
- return !(stream_type == 0x13 ||
- (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
- }
- static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
- {
- MpegTSContext *ts = filter->u.section_filter.opaque;
- MpegTSSectionFilter *tssf = &filter->u.section_filter;
- struct Program old_program;
- SectionHeader h1, *h = &h1;
- PESContext *pes;
- AVStream *st;
- const uint8_t *p, *p_end, *desc_list_end;
- int program_info_length, pcr_pid, pid, stream_type;
- int desc_list_len;
- uint32_t prog_reg_desc = 0;
- int stream_identifier = -1;
- struct Program *prg;
- int mp4_descr_count = 0;
- Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
- int i;
- av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
- hex_dump_debug(ts->stream, section, section_len);
- p_end = section + section_len - 4;
- p = section;
- if (parse_section_header(h, &p, p_end) < 0)
- return;
- if (h->tid != PMT_TID)
- return;
- if (!h->current_next)
- return;
- if (skip_identical(h, tssf))
- return;
- av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
- h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
- if (!ts->scan_all_pmts && ts->skip_changes)
- return;
- prg = get_program(ts, h->id);
- if (prg)
- old_program = *prg;
- else
- clear_program(&old_program);
- if (ts->skip_unknown_pmt && !prg)
- return;
- if (prg && prg->nb_pids && prg->pids[0] != ts->current_pid)
- return;
- if (!ts->skip_clear)
- clear_avprogram(ts, h->id);
- clear_program(prg);
- add_pid_to_program(prg, ts->current_pid);
- pcr_pid = get16(&p, p_end);
- if (pcr_pid < 0)
- return;
- pcr_pid &= 0x1fff;
- add_pid_to_program(prg, pcr_pid);
- update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
- av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
- program_info_length = get16(&p, p_end);
- if (program_info_length < 0)
- return;
- program_info_length &= 0xfff;
- while (program_info_length >= 2) {
- uint8_t tag, len;
- tag = get8(&p, p_end);
- len = get8(&p, p_end);
- av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
- program_info_length -= 2;
- if (len > program_info_length)
-
- break;
- program_info_length -= len;
- if (tag == IOD_DESCRIPTOR) {
- get8(&p, p_end);
- get8(&p, p_end);
- len -= 2;
- mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
- &mp4_descr_count, MAX_MP4_DESCR_COUNT);
- } else if (tag == REGISTRATION_DESCRIPTOR && len >= 4) {
- prog_reg_desc = bytestream_get_le32(&p);
- len -= 4;
- }
- p += len;
- }
- p += program_info_length;
- if (p >= p_end)
- goto out;
-
- if (!ts->pkt)
- ts->stop_parse = 2;
- if (prg)
- prg->pmt_found = 1;
- for (i = 0; i < MAX_STREAMS_PER_PROGRAM; i++) {
- st = 0;
- pes = NULL;
- stream_type = get8(&p, p_end);
- if (stream_type < 0)
- break;
- pid = get16(&p, p_end);
- if (pid < 0)
- goto out;
- pid &= 0x1fff;
- if (pid == ts->current_pid)
- goto out;
- stream_identifier = parse_stream_identifier_desc(p, p_end) + 1;
-
- if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
- pes = ts->pids[pid]->u.pes_filter.opaque;
- if (ts->merge_pmt_versions && !pes->st) {
- st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
- if (st) {
- pes->st = st;
- pes->stream_type = stream_type;
- pes->merged_st = 1;
- }
- }
- if (!pes->st) {
- pes->st = avformat_new_stream(pes->stream, NULL);
- if (!pes->st)
- goto out;
- pes->st->id = pes->pid;
- }
- st = pes->st;
- } else if (is_pes_stream(stream_type, prog_reg_desc)) {
- if (ts->pids[pid])
- mpegts_close_filter(ts, ts->pids[pid]);
- pes = add_pes_stream(ts, pid, pcr_pid);
- if (ts->merge_pmt_versions && pes && !pes->st) {
- st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
- if (st) {
- pes->st = st;
- pes->stream_type = stream_type;
- pes->merged_st = 1;
- }
- }
- if (pes && !pes->st) {
- st = avformat_new_stream(pes->stream, NULL);
- if (!st)
- goto out;
- st->id = pes->pid;
- }
- } else {
- int idx = ff_find_stream_index(ts->stream, pid);
- if (idx >= 0) {
- st = ts->stream->streams[idx];
- }
- if (ts->merge_pmt_versions && !st) {
- st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
- }
- if (!st) {
- st = avformat_new_stream(ts->stream, NULL);
- if (!st)
- goto out;
- st->id = pid;
- st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
- if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
- mpegts_find_stream_type(st, stream_type, SCTE_types);
- mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
- }
- }
- }
- if (!st)
- goto out;
- if (pes && !pes->stream_type)
- mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
- add_pid_to_program(prg, pid);
- if (prg) {
- prg->streams[i].idx = st->index;
- prg->streams[i].stream_identifier = stream_identifier;
- prg->nb_streams++;
- }
- av_program_add_stream_index(ts->stream, h->id, st->index);
- desc_list_len = get16(&p, p_end);
- if (desc_list_len < 0)
- goto out;
- desc_list_len &= 0xfff;
- desc_list_end = p + desc_list_len;
- if (desc_list_end > p_end)
- goto out;
- for (;;) {
- if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
- desc_list_end, mp4_descr,
- mp4_descr_count, pid, ts) < 0)
- break;
- if (pes && 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->codecpar->codec_tag = st->codecpar->codec_tag;
- }
- }
- p = desc_list_end;
- }
- if (!ts->pids[pcr_pid])
- mpegts_open_pcr_filter(ts, pcr_pid);
- out:
- 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)
- {
- MpegTSContext *ts = filter->u.section_filter.opaque;
- MpegTSSectionFilter *tssf = &filter->u.section_filter;
- SectionHeader h1, *h = &h1;
- const uint8_t *p, *p_end;
- int sid, pmt_pid;
- int nb_prg = 0;
- AVProgram *program;
- av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
- hex_dump_debug(ts->stream, section, section_len);
- p_end = section + section_len - 4;
- p = section;
- if (parse_section_header(h, &p, p_end) < 0)
- return;
- if (h->tid != PAT_TID)
- return;
- if (!h->current_next)
- return;
- if (ts->skip_changes)
- return;
- if (skip_identical(h, tssf))
- return;
- ts->id = h->id;
- for (;;) {
- sid = get16(&p, p_end);
- if (sid < 0)
- break;
- pmt_pid = get16(&p, p_end);
- if (pmt_pid < 0)
- break;
- pmt_pid &= 0x1fff;
- if (pmt_pid == ts->current_pid)
- break;
- av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
- if (sid == 0x0000) {
-
- } else {
- MpegTSFilter *fil = ts->pids[pmt_pid];
- struct Program *prg;
- program = av_new_program(ts->stream, sid);
- if (program) {
- program->program_num = sid;
- program->pmt_pid = pmt_pid;
- }
- if (fil)
- if ( fil->type != MPEGTS_SECTION
- || fil->pid != pmt_pid
- || fil->u.section_filter.section_cb != pmt_cb)
- mpegts_close_filter(ts, ts->pids[pmt_pid]);
- if (!ts->pids[pmt_pid])
- mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
- prg = add_program(ts, sid);
- if (prg) {
- unsigned prg_idx = prg - ts->prg;
- if (prg->nb_pids && prg->pids[0] != pmt_pid)
- clear_program(prg);
- add_pid_to_program(prg, pmt_pid);
- if (prg_idx > nb_prg)
- FFSWAP(struct Program, ts->prg[nb_prg], ts->prg[prg_idx]);
- if (prg_idx >= nb_prg)
- nb_prg++;
- } else
- nb_prg = 0;
- }
- }
- ts->nb_prg = nb_prg;
- if (sid < 0) {
- int i,j;
- for (j=0; j<ts->stream->nb_programs; j++) {
- for (i = 0; i < ts->nb_prg; i++)
- if (ts->prg[i].id == ts->stream->programs[j]->id)
- break;
- if (i==ts->nb_prg && !ts->skip_clear)
- clear_avprogram(ts, ts->stream->programs[j]->id);
- }
- }
- }
- static void eit_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
- {
- MpegTSContext *ts = filter->u.section_filter.opaque;
- const uint8_t *p, *p_end;
- SectionHeader h1, *h = &h1;
-
- if (!ts->epg_stream) {
- ts->epg_stream = avformat_new_stream(ts->stream, NULL);
- if (!ts->epg_stream)
- return;
- ts->epg_stream->id = EIT_PID;
- ts->epg_stream->codecpar->codec_type = AVMEDIA_TYPE_DATA;
- ts->epg_stream->codecpar->codec_id = AV_CODEC_ID_EPG;
- }
- if (ts->epg_stream->discard == AVDISCARD_ALL)
- return;
- p_end = section + section_len - 4;
- p = section;
- if (parse_section_header(h, &p, p_end) < 0)
- return;
- if (h->tid < EIT_TID || h->tid > OEITS_END_TID)
- return;
- av_log(ts->stream, AV_LOG_TRACE, "EIT: tid received = %.02x\n", h->tid);
-
- if (h->id == 0xFFFF) {
- av_log(ts->stream, AV_LOG_TRACE, "Scrambled EIT table received.\n");
- return;
- }
-
- if (!ts->pkt)
- return;
- new_data_packet(section, section_len, ts->pkt);
- ts->pkt->stream_index = ts->epg_stream->index;
- ts->stop_parse = 1;
- }
- static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
- {
- MpegTSContext *ts = filter->u.section_filter.opaque;
- MpegTSSectionFilter *tssf = &filter->u.section_filter;
- SectionHeader h1, *h = &h1;
- const uint8_t *p, *p_end, *desc_list_end, *desc_end;
- int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
- char *name, *provider_name;
- av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
- hex_dump_debug(ts->stream, section, section_len);
- p_end = section + section_len - 4;
- p = section;
- if (parse_section_header(h, &p, p_end) < 0)
- return;
- if (h->tid != SDT_TID)
- return;
- if (!h->current_next)
- return;
- if (ts->skip_changes)
- return;
- if (skip_identical(h, tssf))
- return;
- onid = get16(&p, p_end);
- if (onid < 0)
- return;
- val = get8(&p, p_end);
- if (val < 0)
- return;
- for (;;) {
- sid = get16(&p, p_end);
- if (sid < 0)
- break;
- val = get8(&p, p_end);
- if (val < 0)
- break;
- desc_list_len = get16(&p, p_end);
- if (desc_list_len < 0)
- break;
- desc_list_len &= 0xfff;
- desc_list_end = p + desc_list_len;
- if (desc_list_end > p_end)
- break;
- for (;;) {
- desc_tag = get8(&p, desc_list_end);
- if (desc_tag < 0)
- break;
- desc_len = get8(&p, desc_list_end);
- desc_end = p + desc_len;
- if (desc_len < 0 || desc_end > desc_list_end)
- break;
- av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
- desc_tag, desc_len);
- switch (desc_tag) {
- case 0x48:
- service_type = get8(&p, desc_end);
- if (service_type < 0)
- break;
- provider_name = getstr8(&p, desc_end);
- if (!provider_name)
- break;
- name = getstr8(&p, desc_end);
- if (name) {
- AVProgram *program = av_new_program(ts->stream, sid);
- if (program) {
- av_dict_set(&program->metadata, "service_name", name, 0);
- av_dict_set(&program->metadata, "service_provider",
- provider_name, 0);
- }
- }
- av_free(name);
- av_free(provider_name);
- break;
- default:
- break;
- }
- p = desc_end;
- }
- p = desc_list_end;
- }
- }
- static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
- const uint8_t *packet);
- static int handle_packet(MpegTSContext *ts, const uint8_t *packet, int64_t pos)
- {
- MpegTSFilter *tss;
- int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
- has_adaptation, has_payload;
- const uint8_t *p, *p_end;
- pid = AV_RB16(packet + 1) & 0x1fff;
- is_start = packet[1] & 0x40;
- tss = ts->pids[pid];
- if (ts->auto_guess && !tss && is_start) {
- add_pes_stream(ts, pid, -1);
- tss = ts->pids[pid];
- }
- if (!tss)
- return 0;
- if (is_start)
- tss->discard = discard_pid(ts, pid);
- if (tss->discard)
- return 0;
- ts->current_pid = pid;
- afc = (packet[3] >> 4) & 3;
- if (afc == 0)
- return 0;
- has_adaptation = afc & 2;
- has_payload = afc & 1;
- is_discontinuity = has_adaptation &&
- packet[4] != 0 &&
- (packet[5] & 0x80);
-
- cc = (packet[3] & 0xf);
- expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
- cc_ok = pid == 0x1FFF ||
- is_discontinuity ||
- tss->last_cc < 0 ||
- expected_cc == cc;
- tss->last_cc = cc;
- if (!cc_ok) {
- av_log(ts->stream, AV_LOG_DEBUG,
- "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;
- }
- }
- if (packet[1] & 0x80) {
- av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
- if (tss->type == MPEGTS_PES) {
- PESContext *pc = tss->u.pes_filter.opaque;
- pc->flags |= AV_PKT_FLAG_CORRUPT;
- }
- }
- p = packet + 4;
- if (has_adaptation) {
- int64_t pcr_h;
- int pcr_l;
- if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
- tss->last_pcr = pcr_h * 300 + pcr_l;
-
- p += p[0] + 1;
- }
-
- p_end = packet + TS_PACKET_SIZE;
- if (p >= p_end || !has_payload)
- return 0;
- if (pos >= 0) {
- av_assert0(pos >= TS_PACKET_SIZE);
- ts->pos47_full = pos - TS_PACKET_SIZE;
- }
- if (tss->type == MPEGTS_SECTION) {
- if (is_start) {
-
- len = *p++;
- if (len > p_end - p)
- return 0;
- if (len && cc_ok) {
-
- write_section_data(ts, tss,
- p, len, 0);
-
- if (!ts->pids[pid])
- return 0;
- }
- p += len;
- if (p < p_end) {
- write_section_data(ts, tss,
- p, p_end - p, 1);
- }
- } else {
- if (cc_ok) {
- write_section_data(ts, tss,
- p, p_end - p, 0);
- }
- }
-
-
- if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
- int i;
- for (i = 0; i < ts->nb_prg; i++) {
- if (!ts->prg[i].pmt_found)
- break;
- }
- if (i == ts->nb_prg && ts->nb_prg > 0) {
- av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
- ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
- }
- }
- } else {
- int ret;
-
- if (tss->type == MPEGTS_PES) {
- 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;
- }
- static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
- {
- MpegTSContext *ts = s->priv_data;
- AVIOContext *pb = s->pb;
- int c, i;
- uint64_t pos = avio_tell(pb);
- int64_t back = FFMIN(seekback, pos);
-
- if (current_packet[0] == 0x80 && current_packet[12] == 0x47 && pos >= TS_PACKET_SIZE) {
- avio_seek(pb, 12 - TS_PACKET_SIZE, SEEK_CUR);
- return 0;
- }
- avio_seek(pb, -back, SEEK_CUR);
- for (i = 0; i < ts->resync_size; i++) {
- c = avio_r8(pb);
- if (avio_feof(pb))
- return AVERROR_EOF;
- if (c == 0x47) {
- int new_packet_size, ret;
- avio_seek(pb, -1, SEEK_CUR);
- pos = avio_tell(pb);
- ret = ffio_ensure_seekback(pb, PROBE_PACKET_MAX_BUF);
- if (ret < 0)
- return ret;
- new_packet_size = get_packet_size(s);
- if (new_packet_size > 0 && new_packet_size != ts->raw_packet_size) {
- av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", new_packet_size);
- ts->raw_packet_size = new_packet_size;
- }
- avio_seek(pb, pos, SEEK_SET);
- return 0;
- }
- }
- av_log(s, AV_LOG_ERROR,
- "max resync size reached, could not find sync byte\n");
-
- return AVERROR_INVALIDDATA;
- }
- static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
- const uint8_t **data)
- {
- AVIOContext *pb = s->pb;
- int len;
- for (;;) {
- len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
- if (len != TS_PACKET_SIZE)
- return len < 0 ? len : AVERROR_EOF;
-
- if ((*data)[0] != 0x47) {
-
- if (mpegts_resync(s, raw_packet_size, *data) < 0)
- return AVERROR(EAGAIN);
- else
- continue;
- } else {
- break;
- }
- }
- return 0;
- }
- static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
- {
- AVIOContext *pb = s->pb;
- int skip = raw_packet_size - TS_PACKET_SIZE;
- if (skip > 0)
- avio_skip(pb, skip);
- }
- static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
- {
- AVFormatContext *s = ts->stream;
- uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
- const uint8_t *data;
- int64_t packet_num;
- int ret = 0;
- if (avio_tell(s->pb) != ts->last_pos) {
- int i;
- av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
-
- 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_buffer_unref(&pes->buffer);
- pes->data_index = 0;
- pes->state = MPEGTS_SKIP;
- } else if (ts->pids[i]->type == MPEGTS_SECTION) {
- ts->pids[i]->u.section_filter.last_ver = -1;
- }
- ts->pids[i]->last_cc = -1;
- ts->pids[i]->last_pcr = -1;
- }
- }
- }
- ts->stop_parse = 0;
- packet_num = 0;
- memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
- for (;;) {
- packet_num++;
- if (nb_packets != 0 && packet_num >= nb_packets ||
- ts->stop_parse > 1) {
- ret = AVERROR(EAGAIN);
- break;
- }
- if (ts->stop_parse > 0)
- break;
- ret = read_packet(s, packet, ts->raw_packet_size, &data);
- if (ret != 0)
- break;
- ret = handle_packet(ts, data, avio_tell(s->pb));
- finished_reading_packet(s, ts->raw_packet_size);
- if (ret != 0)
- break;
- }
- ts->last_pos = avio_tell(s->pb);
- return ret;
- }
- static int mpegts_probe(const AVProbeData *p)
- {
- const int size = p->buf_size;
- int maxscore = 0;
- int sumscore = 0;
- int i;
- int check_count = size / TS_FEC_PACKET_SIZE;
- #define CHECK_COUNT 10
- #define CHECK_BLOCK 100
- if (!check_count)
- return 0;
- for (i = 0; i<check_count; i+=CHECK_BLOCK) {
- int left = FFMIN(check_count - i, CHECK_BLOCK);
- int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
- int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
- int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
- score = FFMAX3(score, dvhs_score, fec_score);
- sumscore += score;
- maxscore = FFMAX(maxscore, score);
- }
- sumscore = sumscore * CHECK_COUNT / check_count;
- maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
- ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
- if (check_count > CHECK_COUNT && sumscore > 6) {
- return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
- } else if (check_count >= CHECK_COUNT && sumscore > 6) {
- return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
- } else if (check_count >= CHECK_COUNT && maxscore > 6) {
- return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
- } else if (sumscore > 6) {
- return 2;
- } else {
- return 0;
- }
- }
- static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
- {
- int afc, len, flags;
- const uint8_t *p;
- unsigned int v;
- afc = (packet[3] >> 4) & 3;
- if (afc <= 1)
- return AVERROR_INVALIDDATA;
- p = packet + 4;
- len = p[0];
- p++;
- if (len == 0)
- return AVERROR_INVALIDDATA;
- flags = *p++;
- len--;
- if (!(flags & 0x10))
- return AVERROR_INVALIDDATA;
- if (len < 6)
- return AVERROR_INVALIDDATA;
- v = AV_RB32(p);
- *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
- *ppcr_low = ((p[4] & 1) << 8) | p[5];
- return 0;
- }
- static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
-
- if (avio_seek(pb, pos, SEEK_SET) < 0)
- av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
- }
- static int mpegts_read_header(AVFormatContext *s)
- {
- MpegTSContext *ts = s->priv_data;
- AVIOContext *pb = s->pb;
- int64_t pos, probesize = s->probesize;
- int64_t seekback = FFMAX(s->probesize, (int64_t)ts->resync_size + PROBE_PACKET_MAX_BUF);
- ffformatcontext(s)->prefer_codec_framerate = 1;
- if (ffio_ensure_seekback(pb, seekback) < 0)
- av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
- pos = avio_tell(pb);
- ts->raw_packet_size = get_packet_size(s);
- if (ts->raw_packet_size <= 0) {
- av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
- ts->raw_packet_size = TS_PACKET_SIZE;
- }
- ts->stream = s;
- ts->auto_guess = 0;
- if (s->iformat == &ff_mpegts_demuxer.p) {
-
-
- seek_back(s, pb, pos);
- mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
- mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
- mpegts_open_section_filter(ts, EIT_PID, eit_cb, ts, 1);
- handle_packets(ts, probesize / ts->raw_packet_size);
-
- ts->auto_guess = 1;
- av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
- s->ctx_flags |= AVFMTCTX_NOHEADER;
- } else {
- AVStream *st;
- int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
- int64_t pcrs[2], pcr_h;
- uint8_t packet[TS_PACKET_SIZE];
- const uint8_t *data;
-
- st = avformat_new_stream(s, NULL);
- if (!st)
- return AVERROR(ENOMEM);
- avpriv_set_pts_info(st, 60, 1, 27000000);
- st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
- st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
-
- pcr_pid = -1;
- nb_pcrs = 0;
- nb_packets = 0;
- for (;;) {
- ret = read_packet(s, packet, ts->raw_packet_size, &data);
- if (ret < 0)
- return ret;
- pid = AV_RB16(data + 1) & 0x1fff;
- if ((pcr_pid == -1 || pcr_pid == pid) &&
- parse_pcr(&pcr_h, &pcr_l, data) == 0) {
- finished_reading_packet(s, ts->raw_packet_size);
- pcr_pid = pid;
- pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
- nb_pcrs++;
- if (nb_pcrs >= 2) {
- if (pcrs[1] - pcrs[0] > 0) {
-
- break;
- } else {
- av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
- pcrs[0] = pcrs[1];
- nb_pcrs--;
- }
- }
- } else {
- finished_reading_packet(s, ts->raw_packet_size);
- }
- nb_packets++;
- }
-
-
- ts->pcr_incr = pcrs[1] - pcrs[0];
- ts->cur_pcr = pcrs[0] - ts->pcr_incr * (nb_packets - 1);
- s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
- st->codecpar->bit_rate = s->bit_rate;
- st->start_time = ts->cur_pcr;
- av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%"PRId64"\n",
- st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
- }
- seek_back(s, pb, pos);
- return 0;
- }
- #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
- static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
- {
- MpegTSContext *ts = s->priv_data;
- int ret, i;
- int64_t pcr_h, next_pcr_h, pos;
- int pcr_l, next_pcr_l;
- uint8_t pcr_buf[12];
- const uint8_t *data;
- if ((ret = av_new_packet(pkt, TS_PACKET_SIZE)) < 0)
- return ret;
- ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
- pkt->pos = avio_tell(s->pb);
- if (ret < 0) {
- return ret;
- }
- if (data != pkt->data)
- memcpy(pkt->data, data, TS_PACKET_SIZE);
- finished_reading_packet(s, ts->raw_packet_size);
- if (ts->mpeg2ts_compute_pcr) {
-
- if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
-
- pos = avio_tell(s->pb);
- for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
- 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) {
-
- ts->pcr_incr =
- ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
- (i + 1);
- break;
- }
- }
- avio_seek(s->pb, pos, SEEK_SET);
-
- ts->cur_pcr = pcr_h * 300 + pcr_l;
- }
- pkt->pts = ts->cur_pcr;
- pkt->duration = ts->pcr_incr;
- ts->cur_pcr += ts->pcr_incr;
- }
- pkt->stream_index = 0;
- return 0;
- }
- static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
- {
- MpegTSContext *ts = s->priv_data;
- int ret, i;
- pkt->size = -1;
- ts->pkt = pkt;
- ret = handle_packets(ts, 0);
- if (ret < 0) {
- av_packet_unref(ts->pkt);
-
- 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) {
- ret = new_pes_packet(pes, pkt);
- if (ret < 0)
- return ret;
- pes->state = MPEGTS_SKIP;
- ret = 0;
- break;
- }
- }
- }
- if (!ret && pkt->size < 0)
- ret = AVERROR_INVALIDDATA;
- return ret;
- }
- static void mpegts_free(MpegTSContext *ts)
- {
- int i;
- clear_programs(ts);
- for (i = 0; i < FF_ARRAY_ELEMS(ts->pools); i++)
- av_buffer_pool_uninit(&ts->pools[i]);
- for (i = 0; i < NB_PID_MAX; i++)
- if (ts->pids[i])
- mpegts_close_filter(ts, ts->pids[i]);
- }
- static int mpegts_read_close(AVFormatContext *s)
- {
- MpegTSContext *ts = s->priv_data;
- mpegts_free(ts);
- return 0;
- }
- static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
- int64_t *ppos, int64_t pos_limit)
- {
- MpegTSContext *ts = s->priv_data;
- int64_t pos, timestamp;
- uint8_t buf[TS_PACKET_SIZE];
- int pcr_l, pcr_pid =
- ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
- int pos47 = ts->pos47_full % ts->raw_packet_size;
- pos =
- ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
- ts->raw_packet_size + pos47;
- while(pos < pos_limit) {
- if (avio_seek(s->pb, pos, SEEK_SET) < 0)
- return AV_NOPTS_VALUE;
- if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
- return AV_NOPTS_VALUE;
- if (buf[0] != 0x47) {
- if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
- return AV_NOPTS_VALUE;
- pos = avio_tell(s->pb);
- continue;
- }
- if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
- parse_pcr(×tamp, &pcr_l, buf) == 0) {
- *ppos = pos;
- return timestamp;
- }
- pos += ts->raw_packet_size;
- }
- return AV_NOPTS_VALUE;
- }
- static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
- int64_t *ppos, int64_t pos_limit)
- {
- MpegTSContext *ts = s->priv_data;
- AVPacket *pkt;
- int64_t pos;
- int pos47 = ts->pos47_full % ts->raw_packet_size;
- pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
- ff_read_frame_flush(s);
- if (avio_seek(s->pb, pos, SEEK_SET) < 0)
- return AV_NOPTS_VALUE;
- pkt = av_packet_alloc();
- if (!pkt)
- return AV_NOPTS_VALUE;
- while(pos < pos_limit) {
- int ret = av_read_frame(s, pkt);
- if (ret < 0) {
- av_packet_free(&pkt);
- return AV_NOPTS_VALUE;
- }
- if (pkt->dts != AV_NOPTS_VALUE && pkt->pos >= 0) {
- ff_reduce_index(s, pkt->stream_index);
- av_add_index_entry(s->streams[pkt->stream_index], pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME );
- if (pkt->stream_index == stream_index && pkt->pos >= *ppos) {
- int64_t dts = pkt->dts;
- *ppos = pkt->pos;
- av_packet_free(&pkt);
- return dts;
- }
- }
- pos = pkt->pos;
- av_packet_unref(pkt);
- }
- av_packet_free(&pkt);
- return AV_NOPTS_VALUE;
- }
- MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
- {
- MpegTSContext *ts;
- ts = av_mallocz(sizeof(MpegTSContext));
- if (!ts)
- return NULL;
-
- ts->raw_packet_size = TS_PACKET_SIZE;
- ts->max_packet_size = 2048000;
- ts->stream = s;
- ts->auto_guess = 1;
- mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
- mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
- mpegts_open_section_filter(ts, EIT_PID, eit_cb, ts, 1);
- return ts;
- }
- int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
- const uint8_t *buf, int len)
- {
- int len1;
- len1 = len;
- ts->pkt = pkt;
- for (;;) {
- ts->stop_parse = 0;
- if (len < TS_PACKET_SIZE)
- return AVERROR_INVALIDDATA;
- if (buf[0] != 0x47) {
- buf++;
- len--;
- } else {
- handle_packet(ts, buf, len1 - len + TS_PACKET_SIZE);
- buf += TS_PACKET_SIZE;
- len -= TS_PACKET_SIZE;
- if (ts->stop_parse == 1)
- break;
- }
- }
- return len1 - len;
- }
- void avpriv_mpegts_parse_close(MpegTSContext *ts)
- {
- mpegts_free(ts);
- av_free(ts);
- }
- const FFInputFormat ff_mpegts_demuxer = {
- .p.name = "mpegts",
- .p.long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
- .p.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
- .p.priv_class = &mpegts_class,
- .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_timestamp = mpegts_get_dts,
- };
- const FFInputFormat ff_mpegtsraw_demuxer = {
- .p.name = "mpegtsraw",
- .p.long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
- .p.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
- .p.priv_class = &mpegtsraw_class,
- .priv_data_size = sizeof(MpegTSContext),
- .read_header = mpegts_read_header,
- .read_packet = mpegts_raw_read_packet,
- .read_close = mpegts_read_close,
- .read_timestamp = mpegts_get_dts,
- };
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