/* * DEMUXER v2.5 * * This file is part of MPlayer. * * MPlayer is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * MPlayer is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with MPlayer; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include #include #include #include #include #include #include #include "config.h" #include "options.h" #include "talloc.h" #include "mp_msg.h" #include "m_config.h" #include "libvo/fastmemcpy.h" #include "stream/stream.h" #include "demuxer.h" #include "stheader.h" #include "mf.h" #include "libaf/af_format.h" #include "libmpcodecs/dec_teletext.h" #include "libavcodec/avcodec.h" #if MP_INPUT_BUFFER_PADDING_SIZE < FF_INPUT_BUFFER_PADDING_SIZE #error MP_INPUT_BUFFER_PADDING_SIZE is too small! #endif static void clear_parser(sh_common_t *sh); // Demuxer list extern const struct demuxer_desc demuxer_desc_edl; extern const demuxer_desc_t demuxer_desc_rawaudio; extern const demuxer_desc_t demuxer_desc_rawvideo; extern const demuxer_desc_t demuxer_desc_tv; extern const demuxer_desc_t demuxer_desc_mf; extern const demuxer_desc_t demuxer_desc_avi; extern const demuxer_desc_t demuxer_desc_y4m; extern const demuxer_desc_t demuxer_desc_asf; extern const demuxer_desc_t demuxer_desc_real; extern const demuxer_desc_t demuxer_desc_smjpeg; extern const demuxer_desc_t demuxer_desc_matroska; extern const demuxer_desc_t demuxer_desc_realaudio; extern const demuxer_desc_t demuxer_desc_vqf; extern const demuxer_desc_t demuxer_desc_mov; extern const demuxer_desc_t demuxer_desc_vivo; extern const demuxer_desc_t demuxer_desc_fli; extern const demuxer_desc_t demuxer_desc_film; extern const demuxer_desc_t demuxer_desc_roq; extern const demuxer_desc_t demuxer_desc_gif; extern const demuxer_desc_t demuxer_desc_ogg; extern const demuxer_desc_t demuxer_desc_avs; extern const demuxer_desc_t demuxer_desc_pva; extern const demuxer_desc_t demuxer_desc_nsv; extern const demuxer_desc_t demuxer_desc_mpeg_ts; extern const demuxer_desc_t demuxer_desc_lmlm4; extern const demuxer_desc_t demuxer_desc_mpeg_ps; extern const demuxer_desc_t demuxer_desc_mpeg_pes; extern const demuxer_desc_t demuxer_desc_mpeg_es; extern const demuxer_desc_t demuxer_desc_mpeg_gxf; extern const demuxer_desc_t demuxer_desc_mpeg4_es; extern const demuxer_desc_t demuxer_desc_h264_es; extern const demuxer_desc_t demuxer_desc_rawdv; extern const demuxer_desc_t demuxer_desc_mpc; extern const demuxer_desc_t demuxer_desc_audio; extern const demuxer_desc_t demuxer_desc_xmms; extern const demuxer_desc_t demuxer_desc_mpeg_ty; extern const demuxer_desc_t demuxer_desc_rtp; extern const demuxer_desc_t demuxer_desc_rtp_nemesi; extern const demuxer_desc_t demuxer_desc_lavf; extern const demuxer_desc_t demuxer_desc_lavf_preferred; extern const demuxer_desc_t demuxer_desc_aac; extern const demuxer_desc_t demuxer_desc_nut; extern const demuxer_desc_t demuxer_desc_mng; /* Please do not add any new demuxers here. If you want to implement a new * demuxer, add it to libavformat, except for wrappers around external * libraries and demuxers requiring binary support. */ const demuxer_desc_t *const demuxer_list[] = { &demuxer_desc_edl, &demuxer_desc_rawaudio, &demuxer_desc_rawvideo, #ifdef CONFIG_TV &demuxer_desc_tv, #endif &demuxer_desc_mf, &demuxer_desc_lavf_preferred, &demuxer_desc_avi, &demuxer_desc_y4m, &demuxer_desc_asf, &demuxer_desc_nsv, &demuxer_desc_real, &demuxer_desc_smjpeg, &demuxer_desc_matroska, &demuxer_desc_realaudio, &demuxer_desc_vqf, &demuxer_desc_mov, &demuxer_desc_vivo, &demuxer_desc_fli, &demuxer_desc_film, &demuxer_desc_roq, #ifdef CONFIG_GIF &demuxer_desc_gif, #endif #ifdef CONFIG_OGGVORBIS &demuxer_desc_ogg, #endif #ifdef CONFIG_WIN32DLL &demuxer_desc_avs, #endif &demuxer_desc_pva, &demuxer_desc_mpeg_ts, &demuxer_desc_lmlm4, &demuxer_desc_mpeg_ps, &demuxer_desc_mpeg_pes, &demuxer_desc_mpeg_es, &demuxer_desc_mpeg_gxf, &demuxer_desc_mpeg4_es, &demuxer_desc_h264_es, &demuxer_desc_audio, &demuxer_desc_mpeg_ty, #ifdef CONFIG_LIVE555 &demuxer_desc_rtp, #endif #ifdef CONFIG_LIBNEMESI &demuxer_desc_rtp_nemesi, #endif &demuxer_desc_lavf, #ifdef CONFIG_MUSEPACK &demuxer_desc_mpc, #endif #ifdef CONFIG_LIBDV095 &demuxer_desc_rawdv, #endif &demuxer_desc_aac, #ifdef CONFIG_LIBNUT &demuxer_desc_nut, #endif #ifdef CONFIG_XMMS &demuxer_desc_xmms, #endif #ifdef CONFIG_MNG &demuxer_desc_mng, #endif /* Please do not add any new demuxers here. If you want to implement a new * demuxer, add it to libavformat, except for wrappers around external * libraries and demuxers requiring binary support. */ NULL }; static struct demux_packet *create_packet(size_t len) { if (len > 1000000000) { mp_msg(MSGT_DEMUXER, MSGL_FATAL, "Attempt to allocate demux packet " "over 1 GB!\n"); abort(); } struct demux_packet *dp = malloc(sizeof(struct demux_packet)); dp->len = len; dp->next = NULL; dp->pts = MP_NOPTS_VALUE; dp->duration = -1; dp->stream_pts = MP_NOPTS_VALUE; dp->pos = 0; dp->flags = 0; dp->refcount = 1; dp->master = NULL; dp->buffer = NULL; dp->avpacket = NULL; return dp; } struct demux_packet *new_demux_packet(size_t len) { struct demux_packet *dp = create_packet(len); dp->buffer = malloc(len + MP_INPUT_BUFFER_PADDING_SIZE); if (!dp->buffer) { mp_msg(MSGT_DEMUXER, MSGL_FATAL, "Memory allocation failure!\n"); abort(); } memset(dp->buffer + len, 0, 8); return dp; } // data must already have suitable padding struct demux_packet *new_demux_packet_fromdata(void *data, size_t len) { struct demux_packet *dp = create_packet(len); dp->buffer = data; return dp; } void resize_demux_packet(struct demux_packet *dp, size_t len) { if (len > 1000000000) { mp_msg(MSGT_DEMUXER, MSGL_FATAL, "Attempt to realloc demux packet " "over 1 GB!\n"); abort(); } dp->buffer = realloc(dp->buffer, len + MP_INPUT_BUFFER_PADDING_SIZE); if (!dp->buffer) { mp_msg(MSGT_DEMUXER, MSGL_FATAL, "Memory allocation failure!\n"); abort(); } memset(dp->buffer + len, 0, 8); dp->len = len; } struct demux_packet *clone_demux_packet(struct demux_packet *pack) { struct demux_packet *dp = malloc(sizeof(struct demux_packet)); while (pack->master) pack = pack->master; // find the master memcpy(dp, pack, sizeof(struct demux_packet)); dp->next = NULL; dp->refcount = 0; dp->master = pack; pack->refcount++; return dp; } void free_demux_packet(struct demux_packet *dp) { if (dp->master == NULL) { //dp is a master packet dp->refcount--; if (dp->refcount == 0) { if (dp->avpacket) talloc_free(dp->avpacket); else free(dp->buffer); free(dp); } return; } // dp is a clone: free_demux_packet(dp->master); free(dp); } static void free_demuxer_stream(struct demux_stream *ds) { ds_free_packs(ds); free(ds); } static struct demux_stream *new_demuxer_stream(struct demuxer *demuxer, int id) { demux_stream_t *ds = malloc(sizeof(demux_stream_t)); *ds = (demux_stream_t){ .id = id, .demuxer = demuxer, .asf_seq = -1, }; return ds; } /** * Get demuxer description structure for a given demuxer type * * @param file_format type of the demuxer * @return structure for the demuxer, NULL if not found */ static const demuxer_desc_t *get_demuxer_desc_from_type(int file_format) { int i; for (i = 0; demuxer_list[i]; i++) if (file_format == demuxer_list[i]->type) return demuxer_list[i]; return NULL; } demuxer_t *new_demuxer(struct MPOpts *opts, stream_t *stream, int type, int a_id, int v_id, int s_id, char *filename) { struct demuxer *d = talloc_zero(NULL, struct demuxer); d->stream = stream; d->stream_pts = MP_NOPTS_VALUE; d->reference_clock = MP_NOPTS_VALUE; d->movi_start = stream->start_pos; d->movi_end = stream->end_pos; d->seekable = 1; d->synced = 0; d->filepos = -1; d->audio = new_demuxer_stream(d, a_id); d->video = new_demuxer_stream(d, v_id); d->sub = new_demuxer_stream(d, s_id); d->type = type; d->opts = opts; if (type) if (!(d->desc = get_demuxer_desc_from_type(type))) mp_msg(MSGT_DEMUXER, MSGL_ERR, "BUG! Invalid demuxer type in new_demuxer(), " "big troubles ahead."); if (filename) // Filename hack for avs_check_file d->filename = strdup(filename); stream_seek(stream, stream->start_pos); return d; } const char *sh_sub_type2str(int type) { switch (type) { case 't': return "text"; case 'm': return "movtext"; case 'a': return "ass"; case 'v': return "vobsub"; case 'x': return "xsub"; case 'b': return "dvb"; case 'd': return "dvb-teletext"; case 'p': return "hdmv pgs"; } return "unknown"; } sh_sub_t *new_sh_sub_sid(demuxer_t *demuxer, int id, int sid) { if (id > MAX_S_STREAMS - 1 || id < 0) { mp_msg(MSGT_DEMUXER, MSGL_WARN, "Requested sub stream id overflow (%d > %d)\n", id, MAX_S_STREAMS); return NULL; } if (demuxer->s_streams[id]) mp_msg(MSGT_DEMUXER, MSGL_WARN, "Sub stream %i redefined\n", id); else { struct sh_sub *sh = talloc_zero(demuxer, struct sh_sub); demuxer->s_streams[id] = sh; sh->sid = sid; sh->opts = demuxer->opts; mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_SUBTITLE_ID=%d\n", sid); } return demuxer->s_streams[id]; } struct sh_sub *new_sh_sub_sid_lang(struct demuxer *demuxer, int id, int sid, const char *lang) { struct sh_sub *sh = new_sh_sub_sid(demuxer, id, sid); if (lang && lang[0] && strcmp(lang, "und")) { sh->lang = talloc_strdup(sh, lang); mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_SID_%d_LANG=%s\n", sid, lang); } return sh; } static void free_sh_sub(sh_sub_t *sh) { mp_msg(MSGT_DEMUXER, MSGL_DBG2, "DEMUXER: freeing sh_sub at %p\n", sh); free(sh->extradata); clear_parser((sh_common_t *)sh); talloc_free(sh); } sh_audio_t *new_sh_audio_aid(demuxer_t *demuxer, int id, int aid) { if (id > MAX_A_STREAMS - 1 || id < 0) { mp_msg(MSGT_DEMUXER, MSGL_WARN, "Requested audio stream id overflow (%d > %d)\n", id, MAX_A_STREAMS); return NULL; } if (demuxer->a_streams[id]) { mp_tmsg(MSGT_DEMUXER, MSGL_WARN, "WARNING: Audio stream header %d redefined.\n", id); } else { mp_tmsg(MSGT_DEMUXER, MSGL_V, "==> Found audio stream: %d\n", id); struct sh_audio *sh = talloc_zero(demuxer, struct sh_audio); demuxer->a_streams[id] = sh; sh->aid = aid; sh->ds = demuxer->audio; // set some defaults sh->samplesize = 2; sh->sample_format = AF_FORMAT_S16_NE; sh->opts = demuxer->opts; mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_AUDIO_ID=%d\n", aid); } return demuxer->a_streams[id]; } void free_sh_audio(demuxer_t *demuxer, int id) { sh_audio_t *sh = demuxer->a_streams[id]; demuxer->a_streams[id] = NULL; mp_msg(MSGT_DEMUXER, MSGL_DBG2, "DEMUXER: freeing sh_audio at %p\n", sh); free(sh->wf); free(sh->codecdata); clear_parser((sh_common_t *)sh); talloc_free(sh); } sh_video_t *new_sh_video_vid(demuxer_t *demuxer, int id, int vid) { if (id > MAX_V_STREAMS - 1 || id < 0) { mp_msg(MSGT_DEMUXER, MSGL_WARN, "Requested video stream id overflow (%d > %d)\n", id, MAX_V_STREAMS); return NULL; } if (demuxer->v_streams[id]) mp_tmsg(MSGT_DEMUXER, MSGL_WARN, "WARNING: Video stream header %d redefined.\n", id); else { mp_tmsg(MSGT_DEMUXER, MSGL_V, "==> Found video stream: %d\n", id); struct sh_video *sh = talloc_zero(demuxer, struct sh_video); demuxer->v_streams[id] = sh; sh->vid = vid; sh->ds = demuxer->video; sh->opts = demuxer->opts; mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_VIDEO_ID=%d\n", vid); } return demuxer->v_streams[id]; } void free_sh_video(sh_video_t *sh) { mp_msg(MSGT_DEMUXER, MSGL_DBG2, "DEMUXER: freeing sh_video at %p\n", sh); free(sh->bih); clear_parser((sh_common_t *)sh); talloc_free(sh); } void free_demuxer(demuxer_t *demuxer) { int i; mp_msg(MSGT_DEMUXER, MSGL_DBG2, "DEMUXER: freeing %s demuxer at %p\n", demuxer->desc->shortdesc, demuxer); if (demuxer->desc->close) demuxer->desc->close(demuxer); // Very ugly hack to make it behave like old implementation if (demuxer->desc->type == DEMUXER_TYPE_DEMUXERS) goto skip_streamfree; // free streams: for (i = 0; i < MAX_A_STREAMS; i++) if (demuxer->a_streams[i]) free_sh_audio(demuxer, i); for (i = 0; i < MAX_V_STREAMS; i++) if (demuxer->v_streams[i]) free_sh_video(demuxer->v_streams[i]); for (i = 0; i < MAX_S_STREAMS; i++) if (demuxer->s_streams[i]) free_sh_sub(demuxer->s_streams[i]); // free demuxers: free_demuxer_stream(demuxer->audio); free_demuxer_stream(demuxer->video); free_demuxer_stream(demuxer->sub); skip_streamfree: free(demuxer->filename); if (demuxer->teletext) teletext_control(demuxer->teletext, TV_VBI_CONTROL_STOP, NULL); talloc_free(demuxer); } void ds_add_packet(demux_stream_t *ds, demux_packet_t *dp) { // append packet to DS stream: ++ds->packs; ds->bytes += dp->len; if (ds->last) { // next packet in stream ds->last->next = dp; ds->last = dp; } else { // first packet in stream ds->first = ds->last = dp; } mp_dbg(MSGT_DEMUXER, MSGL_DBG2, "DEMUX: Append packet to %s, len=%d pts=%5.3f pos=%u [packs: A=%d V=%d]\n", (ds == ds->demuxer->audio) ? "d_audio" : "d_video", dp->len, dp->pts, (unsigned int) dp->pos, ds->demuxer->audio->packs, ds->demuxer->video->packs); } static void allocate_parser(AVCodecContext **avctx, AVCodecParserContext **parser, unsigned format) { enum CodecID codec_id = CODEC_ID_NONE; switch (format) { case MKTAG('M', 'P', '4', 'L'): codec_id = CODEC_ID_AAC_LATM; break; case 0x2000: case 0x332D6361: case 0x332D4341: case 0x20736D: case MKTAG('s', 'a', 'c', '3'): codec_id = CODEC_ID_AC3; break; case MKTAG('d', 'n', 'e', 't'): // DNET/byte-swapped AC-3 - there is no parser for that yet //codec_id = CODEC_ID_DNET; break; case MKTAG('E', 'A', 'C', '3'): codec_id = CODEC_ID_EAC3; break; case 0x2001: case 0x86: codec_id = CODEC_ID_DTS; break; case MKTAG('f', 'L', 'a', 'C'): codec_id = CODEC_ID_FLAC; break; case MKTAG('M', 'L', 'P', ' '): codec_id = CODEC_ID_MLP; break; case 0x55: case 0x5500736d: case 0x55005354: case MKTAG('.', 'm', 'p', '3'): case MKTAG('M', 'P', '3', ' '): case MKTAG('L', 'A', 'M', 'E'): codec_id = CODEC_ID_MP3; break; case 0x50: case 0x5000736d: case MKTAG('.', 'm', 'p', '2'): case MKTAG('.', 'm', 'p', '1'): codec_id = CODEC_ID_MP2; break; case MKTAG('T', 'R', 'H', 'D'): codec_id = CODEC_ID_TRUEHD; break; } if (codec_id != CODEC_ID_NONE) { *avctx = avcodec_alloc_context3(NULL); if (!*avctx) return; *parser = av_parser_init(codec_id); if (!*parser) av_freep(avctx); } } static void get_parser(sh_common_t *sh, AVCodecContext **avctx, AVCodecParserContext **parser) { *avctx = NULL; *parser = NULL; if (!sh || !sh->needs_parsing) return; *avctx = sh->avctx; *parser = sh->parser; if (*parser) return; allocate_parser(avctx, parser, sh->format); sh->avctx = *avctx; sh->parser = *parser; } int ds_parse(demux_stream_t *ds, uint8_t **buffer, int *len, double pts, off_t pos) { AVCodecContext *avctx; AVCodecParserContext *parser; get_parser(ds->sh, &avctx, &parser); if (!parser) return *len; return av_parser_parse2(parser, avctx, buffer, len, *buffer, *len, pts, pts, pos); } static void clear_parser(sh_common_t *sh) { av_parser_close(sh->parser); sh->parser = NULL; av_freep(&sh->avctx); } void ds_clear_parser(demux_stream_t *ds) { if (!ds->sh) return; clear_parser(ds->sh); } void ds_read_packet(demux_stream_t *ds, stream_t *stream, int len, double pts, off_t pos, int flags) { demux_packet_t *dp = new_demux_packet(len); len = stream_read(stream, dp->buffer, len); resize_demux_packet(dp, len); dp->pts = pts; dp->pos = pos; dp->flags = flags; // append packet to DS stream: ds_add_packet(ds, dp); } // return value: // 0 = EOF or no stream found or invalid type // 1 = successfully read a packet int demux_fill_buffer(demuxer_t *demux, demux_stream_t *ds) { // Note: parameter 'ds' can be NULL! return demux->desc->fill_buffer(demux, ds); } // return value: // 0 = EOF // 1 = successful int ds_fill_buffer(demux_stream_t *ds) { demuxer_t *demux = ds->demuxer; if (ds->current) free_demux_packet(ds->current); ds->current = NULL; mp_dbg(MSGT_DEMUXER, MSGL_DBG3, "ds_fill_buffer (%s) called\n", ds == demux->audio ? "d_audio" : ds == demux->video ? "d_video" : ds == demux->sub ? "d_sub" : "unknown"); while (1) { if (ds->packs) { demux_packet_t *p = ds->first; // copy useful data: ds->buffer = p->buffer; ds->buffer_pos = 0; ds->buffer_size = p->len; ds->pos = p->pos; ds->dpos += p->len; // !!! ++ds->pack_no; if (p->pts != MP_NOPTS_VALUE) { ds->pts = p->pts; ds->pts_bytes = 0; } ds->pts_bytes += p->len; // !!! if (p->stream_pts != MP_NOPTS_VALUE) demux->stream_pts = p->stream_pts; ds->flags = p->flags; // unlink packet: ds->bytes -= p->len; ds->current = p; ds->first = p->next; if (!ds->first) ds->last = NULL; --ds->packs; /* The code below can set ds->eof to 1 when another stream runs * out of buffer space. That makes sense because in that situation * the calling code should not count on being able to demux more * packets from this stream. * If however the situation improves and we're called again * despite the eof flag then it's better to clear it to avoid * weird behavior. */ ds->eof = 0; return 1; } #define MaybeNI _("Maybe you are playing a non-interleaved stream/file or the codec failed?\n" \ "For AVI files, try to force non-interleaved mode with the -ni option.\n") if (demux->audio->packs >= MAX_PACKS || demux->audio->bytes >= MAX_PACK_BYTES) { mp_tmsg(MSGT_DEMUXER, MSGL_ERR, "\nToo many audio packets in the buffer: (%d in %d bytes).\n", demux->audio->packs, demux->audio->bytes); mp_tmsg(MSGT_DEMUXER, MSGL_HINT, MaybeNI); break; } if (demux->video->packs >= MAX_PACKS || demux->video->bytes >= MAX_PACK_BYTES) { mp_tmsg(MSGT_DEMUXER, MSGL_ERR, "\nToo many video packets in the buffer: (%d in %d bytes).\n", demux->video->packs, demux->video->bytes); mp_tmsg(MSGT_DEMUXER, MSGL_HINT, MaybeNI); break; } if (!demux_fill_buffer(demux, ds)) { mp_dbg(MSGT_DEMUXER, MSGL_DBG2, "ds_fill_buffer()->demux_fill_buffer() failed\n"); break; // EOF } } ds->buffer_pos = ds->buffer_size = 0; ds->buffer = NULL; mp_msg(MSGT_DEMUXER, MSGL_V, "ds_fill_buffer: EOF reached (stream: %s) \n", ds == demux->audio ? "audio" : "video"); ds->eof = 1; return 0; } int demux_read_data(demux_stream_t *ds, unsigned char *mem, int len) { int x; int bytes = 0; while (len > 0) { x = ds->buffer_size - ds->buffer_pos; if (x == 0) { if (!ds_fill_buffer(ds)) return bytes; } else { if (x > len) x = len; if (mem) fast_memcpy(mem + bytes, &ds->buffer[ds->buffer_pos], x); bytes += x; len -= x; ds->buffer_pos += x; } } return bytes; } /** * \brief read data until the given 3-byte pattern is encountered, up to maxlen * \param mem memory to read data into, may be NULL to discard data * \param maxlen maximum number of bytes to read * \param read number of bytes actually read * \param pattern pattern to search for (lowest 8 bits are ignored) * \return whether pattern was found */ int demux_pattern_3(demux_stream_t *ds, unsigned char *mem, int maxlen, int *read, uint32_t pattern) { register uint32_t head = 0xffffff00; register uint32_t pat = pattern & 0xffffff00; int total_len = 0; do { register unsigned char *ds_buf = &ds->buffer[ds->buffer_size]; int len = ds->buffer_size - ds->buffer_pos; register long pos = -len; if (unlikely(pos >= 0)) { // buffer is empty ds_fill_buffer(ds); continue; } do { head |= ds_buf[pos]; head <<= 8; } while (++pos && head != pat); len += pos; if (total_len + len > maxlen) len = maxlen - total_len; len = demux_read_data(ds, mem ? &mem[total_len] : NULL, len); total_len += len; } while ((head != pat || total_len < 3) && total_len < maxlen && !ds->eof); if (read) *read = total_len; return total_len >= 3 && head == pat; } void ds_free_packs(demux_stream_t *ds) { demux_packet_t *dp = ds->first; while (dp) { demux_packet_t *dn = dp->next; free_demux_packet(dp); dp = dn; } if (ds->asf_packet) { // free unfinished .asf fragments: free(ds->asf_packet->buffer); free(ds->asf_packet); ds->asf_packet = NULL; } ds->first = ds->last = NULL; ds->packs = 0; // !!!!! ds->bytes = 0; if (ds->current) free_demux_packet(ds->current); ds->current = NULL; ds->buffer = NULL; ds->buffer_pos = ds->buffer_size; ds->pts = MP_NOPTS_VALUE; ds->pts_bytes = 0; } int ds_get_packet(demux_stream_t *ds, unsigned char **start) { int len; if (ds->buffer_pos >= ds->buffer_size) { if (!ds_fill_buffer(ds)) { // EOF *start = NULL; return -1; } } len = ds->buffer_size - ds->buffer_pos; *start = &ds->buffer[ds->buffer_pos]; ds->buffer_pos += len; return len; } int ds_get_packet_pts(demux_stream_t *ds, unsigned char **start, double *pts) { int len; *pts = MP_NOPTS_VALUE; len = ds_get_packet(ds, start); if (len < 0) return len; // Return pts unless this read starts from the middle of a packet if (len == ds->buffer_pos) *pts = ds->current->pts; return len; } int ds_get_packet_sub(demux_stream_t *ds, unsigned char **start) { int len; if (ds->buffer_pos >= ds->buffer_size) { *start = NULL; if (!ds->packs) return -1; // no sub if (!ds_fill_buffer(ds)) return -1; // EOF } len = ds->buffer_size - ds->buffer_pos; *start = &ds->buffer[ds->buffer_pos]; ds->buffer_pos += len; return len; } struct demux_packet *ds_get_packet2(struct demux_stream *ds, bool repeat_last) { // This shouldn't get used together with partial reads assert(ds->buffer_pos == 0 || ds->buffer_pos >= ds->buffer_size); if (!repeat_last) ds_fill_buffer(ds); ds->buffer_pos = ds->buffer_size; return ds->current; } double ds_get_next_pts(demux_stream_t *ds) { demuxer_t *demux = ds->demuxer; // if we have not read from the "current" packet, consider it // as the next, otherwise we never get the pts for the first packet. while (!ds->first && (!ds->current || ds->buffer_pos)) { if (demux->audio->packs >= MAX_PACKS || demux->audio->bytes >= MAX_PACK_BYTES) { mp_tmsg(MSGT_DEMUXER, MSGL_ERR, "\nToo many audio packets in the buffer: (%d in %d bytes).\n", demux->audio->packs, demux->audio->bytes); mp_tmsg(MSGT_DEMUXER, MSGL_HINT, MaybeNI); return MP_NOPTS_VALUE; } if (demux->video->packs >= MAX_PACKS || demux->video->bytes >= MAX_PACK_BYTES) { mp_tmsg(MSGT_DEMUXER, MSGL_ERR, "\nToo many video packets in the buffer: (%d in %d bytes).\n", demux->video->packs, demux->video->bytes); mp_tmsg(MSGT_DEMUXER, MSGL_HINT, MaybeNI); return MP_NOPTS_VALUE; } if (!demux_fill_buffer(demux, ds)) return MP_NOPTS_VALUE; } // take pts from "current" if we never read from it. if (ds->current && !ds->buffer_pos) return ds->current->pts; return ds->first->pts; } // ==================================================================== void demuxer_help(void) { int i; mp_msg(MSGT_DEMUXER, MSGL_INFO, "Available demuxers:\n"); mp_msg(MSGT_DEMUXER, MSGL_INFO, " demuxer: info: (comment)\n"); mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_DEMUXERS\n"); for (i = 0; demuxer_list[i]; i++) { if (demuxer_list[i]->type >= DEMUXER_TYPE_END) // internal type continue; if (demuxer_list[i]->comment && strlen(demuxer_list[i]->comment)) mp_msg(MSGT_DEMUXER, MSGL_INFO, "%10s %s (%s)\n", demuxer_list[i]->name, demuxer_list[i]->info, demuxer_list[i]->comment); else mp_msg(MSGT_DEMUXER, MSGL_INFO, "%10s %s\n", demuxer_list[i]->name, demuxer_list[i]->info); } } /** * Get demuxer type for a given demuxer name * * @param demuxer_name string with demuxer name of demuxer number * @param force will be set if demuxer should be forced. * May be NULL. * @return DEMUXER_TYPE_xxx, -1 if error or not found */ static int get_demuxer_type_from_name(char *demuxer_name, int *force) { if (!demuxer_name || !demuxer_name[0]) return DEMUXER_TYPE_UNKNOWN; if (force) *force = demuxer_name[0] == '+'; if (demuxer_name[0] == '+') demuxer_name = &demuxer_name[1]; for (int i = 0; demuxer_list[i]; i++) { if (demuxer_list[i]->type >= DEMUXER_TYPE_END) // Can't select special demuxers from commandline continue; if (strcmp(demuxer_name, demuxer_list[i]->name) == 0) return demuxer_list[i]->type; } return -1; } static struct demuxer *open_given_type(struct MPOpts *opts, const struct demuxer_desc *desc, struct stream *stream, bool force, int audio_id, int video_id, int sub_id, char *filename, struct demuxer_params *params) { struct demuxer *demuxer; int fformat; demuxer = new_demuxer(opts, stream, desc->type, audio_id, video_id, sub_id, filename); demuxer->params = params; if (desc->check_file) fformat = desc->check_file(demuxer); else fformat = desc->type; if (force) fformat = desc->type; if (fformat == 0) goto fail; if (fformat == desc->type) { if (demuxer->filetype) mp_tmsg(MSGT_DEMUXER, MSGL_INFO, "Detected file format: %s (%s)\n", demuxer->filetype, desc->shortdesc); else mp_tmsg(MSGT_DEMUXER, MSGL_INFO, "Detected file format: %s\n", desc->shortdesc); if (demuxer->desc->open) { struct demuxer *demux2 = demuxer->desc->open(demuxer); if (!demux2) { mp_tmsg(MSGT_DEMUXER, MSGL_ERR, "Opening as detected format " "\"%s\" failed.\n", desc->shortdesc); goto fail; } /* At least demux_mov can return a demux_demuxers instance * from open() instead of the original fed in. */ demuxer = demux2; } demuxer->file_format = fformat; return demuxer; } else { // demux_mov can return playlist instead of mov if (fformat == DEMUXER_TYPE_PLAYLIST) return demuxer; // handled in mplayer.c /* Internal MPEG PS demuxer check can return other MPEG subtypes * which don't have their own checks; recurse to try opening as * the returned type instead. */ free_demuxer(demuxer); desc = get_demuxer_desc_from_type(fformat); if (!desc) { mp_msg(MSGT_DEMUXER, MSGL_ERR, "BUG: recursion to nonexistent file format\n"); return NULL; } return open_given_type(opts, desc, stream, false, audio_id, video_id, sub_id, filename, params); } fail: free_demuxer(demuxer); return NULL; } static struct demuxer *demux_open_stream(struct MPOpts *opts, struct stream *stream, int file_format, bool force, int audio_id, int video_id, int sub_id, char *filename, struct demuxer_params *params) { struct demuxer *demuxer = NULL; const struct demuxer_desc *desc; // If somebody requested a demuxer check it if (file_format) { desc = get_demuxer_desc_from_type(file_format); if (!desc) // should only happen with obsolete -demuxer 99 numeric format return NULL; demuxer = open_given_type(opts, desc, stream, force, audio_id, video_id, sub_id, filename, params); if (demuxer) goto dmx_open; return NULL; } // Test demuxers with safe file checks for (int i = 0; (desc = demuxer_list[i]); i++) { if (desc->safe_check) { demuxer = open_given_type(opts, desc, stream, false, audio_id, video_id, sub_id, filename, params); if (demuxer) goto dmx_open; } } // Ok. We're over the stable detectable fileformats, the next ones are // a bit fuzzy. So by default (extension_parsing==1) try extension-based // detection first: if (filename && opts->extension_parsing == 1) { desc = get_demuxer_desc_from_type(demuxer_type_by_filename(filename)); if (desc) demuxer = open_given_type(opts, desc, stream, false, audio_id, video_id, sub_id, filename, params); if (demuxer) goto dmx_open; } // Finally try detection for demuxers with unsafe checks for (int i = 0; (desc = demuxer_list[i]); i++) { if (!desc->safe_check && desc->check_file) { demuxer = open_given_type(opts, desc, stream, false, audio_id, video_id, sub_id, filename, params); if (demuxer) goto dmx_open; } } return NULL; dmx_open: if (demuxer->type == DEMUXER_TYPE_PLAYLIST) return demuxer; struct sh_video *sh_video = demuxer->video->sh; if (sh_video && sh_video->bih) { int biComp = le2me_32(sh_video->bih->biCompression); mp_msg(MSGT_DEMUX, MSGL_INFO, "VIDEO: [%.4s] %dx%d %dbpp %5.3f fps %5.1f kbps (%4.1f kbyte/s)\n", (char *) &biComp, sh_video->bih->biWidth, sh_video->bih->biHeight, sh_video->bih->biBitCount, sh_video->fps, sh_video->i_bps * 0.008f, sh_video->i_bps / 1024.0f); } return demuxer; } struct demuxer *demux_open(struct MPOpts *opts, stream_t *vs, int file_format, int audio_id, int video_id, int sub_id, char *filename) { return demux_open_withparams(opts, vs, file_format, audio_id, video_id, sub_id, filename, NULL); } struct demuxer *demux_open_withparams(struct MPOpts *opts, stream_t *vs, int file_format, int audio_id, int video_id, int dvdsub_id, char *filename, struct demuxer_params *params) { stream_t *as = NULL, *ss = NULL; demuxer_t *vd, *ad = NULL, *sd = NULL; demuxer_t *res; int afmt = DEMUXER_TYPE_UNKNOWN, sfmt = DEMUXER_TYPE_UNKNOWN; int demuxer_type; int audio_demuxer_type = 0, sub_demuxer_type = 0; int demuxer_force = 0, audio_demuxer_force = 0, sub_demuxer_force = 0; if ((demuxer_type = get_demuxer_type_from_name(opts->demuxer_name, &demuxer_force)) < 0) { mp_msg(MSGT_DEMUXER, MSGL_ERR, "-demuxer %s does not exist.\n", opts->demuxer_name); return NULL; } if ((audio_demuxer_type = get_demuxer_type_from_name(opts->audio_demuxer_name, &audio_demuxer_force)) < 0) { mp_msg(MSGT_DEMUXER, MSGL_ERR, "-audio-demuxer %s does not exist.\n", opts->audio_demuxer_name); if (opts->audio_stream) return NULL; } if ((sub_demuxer_type = get_demuxer_type_from_name(opts->sub_demuxer_name, &sub_demuxer_force)) < 0) { mp_msg(MSGT_DEMUXER, MSGL_ERR, "-sub-demuxer %s does not exist.\n", opts->sub_demuxer_name); if (opts->sub_stream) return NULL; } if (opts->audio_stream) { as = open_stream(opts->audio_stream, 0, &afmt); if (!as) { mp_tmsg(MSGT_DEMUXER, MSGL_ERR, "Cannot open audio stream: %s\n", opts->audio_stream); return NULL; } if (opts->audio_stream_cache) { if (!stream_enable_cache (as, opts->audio_stream_cache * 1024, opts->audio_stream_cache * 1024 * (opts->stream_cache_min_percent / 100.0), opts->audio_stream_cache * 1024 * (opts->stream_cache_seek_min_percent / 100.0))) { free_stream(as); mp_msg(MSGT_DEMUXER, MSGL_ERR, "Can't enable audio stream cache\n"); return NULL; } } } if (opts->sub_stream) { ss = open_stream(opts->sub_stream, 0, &sfmt); if (!ss) { mp_tmsg(MSGT_DEMUXER, MSGL_ERR, "Cannot open subtitle stream: %s\n", opts->sub_stream); return NULL; } } vd = demux_open_stream(opts, vs, demuxer_type ? demuxer_type : file_format, demuxer_force, opts->audio_stream ? -2 : audio_id, video_id, opts->sub_stream ? -2 : dvdsub_id, filename, params); if (!vd) { if (as) free_stream(as); if (ss) free_stream(ss); return NULL; } if (as) { ad = demux_open_stream(opts, as, audio_demuxer_type ? audio_demuxer_type : afmt, audio_demuxer_force, audio_id, -2, -2, opts->audio_stream, params); if (!ad) { mp_tmsg(MSGT_DEMUXER, MSGL_WARN, "Failed to open audio demuxer: %s\n", opts->audio_stream); free_stream(as); } else if (ad->audio->sh && ((sh_audio_t *) ad->audio->sh)->format == 0x55) // MP3 opts->hr_mp3_seek = 1; // Enable high res seeking } if (ss) { sd = demux_open_stream(opts, ss, sub_demuxer_type ? sub_demuxer_type : sfmt, sub_demuxer_force, -2, -2, dvdsub_id, opts->sub_stream, params); if (!sd) { mp_tmsg(MSGT_DEMUXER, MSGL_WARN, "Failed to open subtitle demuxer: %s\n", opts->sub_stream); free_stream(ss); } } if (ad && sd) res = new_demuxers_demuxer(vd, ad, sd); else if (ad) res = new_demuxers_demuxer(vd, ad, vd); else if (sd) res = new_demuxers_demuxer(vd, vd, sd); else res = vd; opts->correct_pts = opts->user_correct_pts; if (opts->correct_pts < 0) opts->correct_pts = demux_control(vd ? vd : res, DEMUXER_CTRL_CORRECT_PTS, NULL) == DEMUXER_CTRL_OK; return res; } void demux_flush(demuxer_t *demuxer) { ds_free_packs(demuxer->video); ds_free_packs(demuxer->audio); ds_free_packs(demuxer->sub); } int demux_seek(demuxer_t *demuxer, float rel_seek_secs, float audio_delay, int flags) { if (!demuxer->seekable) { if (demuxer->file_format == DEMUXER_TYPE_AVI) mp_tmsg(MSGT_SEEK, MSGL_WARN, "Cannot seek in raw AVI streams. (Index required, try with the -idx switch.)\n"); #ifdef CONFIG_TV else if (demuxer->file_format == DEMUXER_TYPE_TV) mp_tmsg(MSGT_SEEK, MSGL_WARN, "TV input is not seekable! (Seeking will probably be for changing channels ;)\n"); #endif else mp_tmsg(MSGT_SEEK, MSGL_WARN, "Cannot seek in this file.\n"); return 0; } // clear demux buffers: demux_flush(demuxer); demuxer->video->eof = 0; demuxer->audio->eof = 0; demuxer->sub->eof = 0; /* HACK: assume any demuxer used with these streams can cope with * the stream layer suddenly seeking to a different position under it * (nothing actually implements DEMUXER_CTRL_RESYNC now). */ struct stream *stream = demuxer->stream; if (stream->type == STREAMTYPE_DVD || stream->type == STREAMTYPE_DVDNAV) { double pts; if (flags & SEEK_ABSOLUTE) pts = 0.0f; else { if (demuxer->stream_pts == MP_NOPTS_VALUE) goto dmx_seek; pts = demuxer->stream_pts; } if (flags & SEEK_FACTOR) { double tmp = 0; if (stream_control(demuxer->stream, STREAM_CTRL_GET_TIME_LENGTH, &tmp) == STREAM_UNSUPPORTED) goto dmx_seek; pts += tmp * rel_seek_secs; } else pts += rel_seek_secs; if (stream_control(demuxer->stream, STREAM_CTRL_SEEK_TO_TIME, &pts) != STREAM_UNSUPPORTED) { demux_control(demuxer, DEMUXER_CTRL_RESYNC, NULL); return 1; } } dmx_seek: if (demuxer->desc->seek) demuxer->desc->seek(demuxer, rel_seek_secs, audio_delay, flags); return 1; } int demux_info_add(demuxer_t *demuxer, const char *opt, const char *param) { return demux_info_add_bstr(demuxer, bstr(opt), bstr(param)); } int demux_info_add_bstr(demuxer_t *demuxer, struct bstr opt, struct bstr param) { char **info = demuxer->info; int n = 0; for (n = 0; info && info[2 * n] != NULL; n++) { if (!bstrcasecmp(opt, bstr(info[2*n]))) { if (!bstrcmp(param, bstr(info[2*n + 1]))) { mp_msg(MSGT_DEMUX, MSGL_V, "Demuxer info %.*s set to unchanged value %.*s\n", BSTR_P(opt), BSTR_P(param)); return 0; } mp_tmsg(MSGT_DEMUX, MSGL_INFO, "Demuxer info %.*s changed to %.*s\n", BSTR_P(opt), BSTR_P(param)); talloc_free(info[2*n + 1]); info[2*n + 1] = talloc_strndup(demuxer->info, param.start, param.len); return 0; } } info = demuxer->info = talloc_realloc(demuxer, info, char *, 2 * (n + 2)); info[2*n] = talloc_strndup(demuxer->info, opt.start, opt.len); info[2*n + 1] = talloc_strndup(demuxer->info, param.start, param.len); memset(&info[2 * (n + 1)], 0, 2 * sizeof(char *)); return 1; } int demux_info_print(demuxer_t *demuxer) { char **info = demuxer->info; int n; if (!info) return 0; mp_tmsg(MSGT_DEMUX, MSGL_INFO, "Clip info:\n"); for (n = 0; info[2 * n] != NULL; n++) { mp_msg(MSGT_DEMUX, MSGL_INFO, " %s: %s\n", info[2 * n], info[2 * n + 1]); mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_CLIP_INFO_NAME%d=%s\n", n, info[2 * n]); mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_CLIP_INFO_VALUE%d=%s\n", n, info[2 * n + 1]); } mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_CLIP_INFO_N=%d\n", n); return 0; } char *demux_info_get(demuxer_t *demuxer, const char *opt) { int i; char **info = demuxer->info; for (i = 0; info && info[2 * i] != NULL; i++) { if (!strcasecmp(opt, info[2 * i])) return info[2 * i + 1]; } return NULL; } int demux_control(demuxer_t *demuxer, int cmd, void *arg) { if (demuxer->desc->control) return demuxer->desc->control(demuxer, cmd, arg); return DEMUXER_CTRL_NOTIMPL; } int demuxer_switch_audio(demuxer_t *demuxer, int index) { int res = demux_control(demuxer, DEMUXER_CTRL_SWITCH_AUDIO, &index); if (res == DEMUXER_CTRL_NOTIMPL) { struct sh_audio *sh_audio = demuxer->audio->sh; return sh_audio ? sh_audio->aid : -2; } if (demuxer->audio->id >= 0) { struct sh_audio *sh_audio = demuxer->a_streams[demuxer->audio->id]; demuxer->audio->sh = sh_audio; index = sh_audio->aid; // internal MPEG demuxers don't set it right } else demuxer->audio->sh = NULL; return index; } int demuxer_switch_video(demuxer_t *demuxer, int index) { int res = demux_control(demuxer, DEMUXER_CTRL_SWITCH_VIDEO, &index); if (res == DEMUXER_CTRL_NOTIMPL) { struct sh_video *sh_video = demuxer->video->sh; return sh_video ? sh_video->vid : -2; } if (demuxer->video->id >= 0) { struct sh_video *sh_video = demuxer->v_streams[demuxer->video->id]; demuxer->video->sh = sh_video; index = sh_video->vid; // internal MPEG demuxers don't set it right } else demuxer->video->sh = NULL; return index; } int demuxer_add_attachment(demuxer_t *demuxer, struct bstr name, struct bstr type, struct bstr data) { if (!(demuxer->num_attachments % 32)) demuxer->attachments = talloc_realloc(demuxer, demuxer->attachments, struct demux_attachment, demuxer->num_attachments + 32); struct demux_attachment *att = demuxer->attachments + demuxer->num_attachments; att->name = talloc_strndup(demuxer->attachments, name.start, name.len); att->type = talloc_strndup(demuxer->attachments, type.start, type.len); att->data = talloc_size(demuxer->attachments, data.len); memcpy(att->data, data.start, data.len); att->data_size = data.len; return demuxer->num_attachments++; } int demuxer_add_chapter(demuxer_t *demuxer, struct bstr name, uint64_t start, uint64_t end) { if (!(demuxer->num_chapters % 32)) demuxer->chapters = talloc_realloc(demuxer, demuxer->chapters, struct demux_chapter, demuxer->num_chapters + 32); demuxer->chapters[demuxer->num_chapters].start = start; demuxer->chapters[demuxer->num_chapters].end = end; demuxer->chapters[demuxer->num_chapters].name = name.len ? talloc_strndup(demuxer->chapters, name.start, name.len) : talloc_strdup(demuxer->chapters, mp_gtext("unknown")); return demuxer->num_chapters++; } /** * \brief demuxer_seek_chapter() seeks to a chapter in two possible ways: * either using the demuxer->chapters structure set by the demuxer * or asking help to the stream layer (e.g. dvd) * \param chapter - chapter number wished - 0-based * \param seek_pts set by the function to the pts to seek to (if demuxer->chapters is set) * \return -1 on error, current chapter if successful */ int demuxer_seek_chapter(demuxer_t *demuxer, int chapter, double *seek_pts) { int ris; if (!demuxer->num_chapters || !demuxer->chapters) { demux_flush(demuxer); ris = stream_control(demuxer->stream, STREAM_CTRL_SEEK_TO_CHAPTER, &chapter); if (ris != STREAM_UNSUPPORTED) demux_control(demuxer, DEMUXER_CTRL_RESYNC, NULL); // exit status may be ok, but main() doesn't have to seek itself // (because e.g. dvds depend on sectors, not on pts) *seek_pts = -1.0; return ris != STREAM_UNSUPPORTED ? chapter : -1; } else { // chapters structure is set in the demuxer if (chapter >= demuxer->num_chapters) return -1; if (chapter < 0) chapter = 0; *seek_pts = demuxer->chapters[chapter].start / 1e9; return chapter; } } int demuxer_get_current_chapter(demuxer_t *demuxer, double time_now) { int chapter = -2; if (!demuxer->num_chapters || !demuxer->chapters) { if (stream_control(demuxer->stream, STREAM_CTRL_GET_CURRENT_CHAPTER, &chapter) == STREAM_UNSUPPORTED) chapter = -2; } else { uint64_t now = time_now * 1e9 + 0.5; for (chapter = demuxer->num_chapters - 1; chapter >= 0; --chapter) { if (demuxer->chapters[chapter].start <= now) break; } } return chapter; } char *demuxer_chapter_name(demuxer_t *demuxer, int chapter) { if (demuxer->num_chapters && demuxer->chapters) { if (chapter >= 0 && chapter < demuxer->num_chapters && demuxer->chapters[chapter].name) return talloc_strdup(NULL, demuxer->chapters[chapter].name); } return NULL; } float demuxer_chapter_time(demuxer_t *demuxer, int chapter, float *end) { if (demuxer->num_chapters && demuxer->chapters && chapter >= 0 && chapter < demuxer->num_chapters) { if (end) *end = demuxer->chapters[chapter].end / 1e9; return demuxer->chapters[chapter].start / 1e9; } return -1.0; } int demuxer_chapter_count(demuxer_t *demuxer) { if (!demuxer->num_chapters || !demuxer->chapters) { int num_chapters = 0; if (stream_control(demuxer->stream, STREAM_CTRL_GET_NUM_CHAPTERS, &num_chapters) == STREAM_UNSUPPORTED) num_chapters = 0; return num_chapters; } else return demuxer->num_chapters; } int demuxer_angles_count(demuxer_t *demuxer) { int ris, angles = -1; ris = stream_control(demuxer->stream, STREAM_CTRL_GET_NUM_ANGLES, &angles); if (ris == STREAM_UNSUPPORTED) return -1; return angles; } int demuxer_get_current_angle(demuxer_t *demuxer) { int ris, curr_angle = -1; ris = stream_control(demuxer->stream, STREAM_CTRL_GET_ANGLE, &curr_angle); if (ris == STREAM_UNSUPPORTED) return -1; return curr_angle; } int demuxer_set_angle(demuxer_t *demuxer, int angle) { int ris, angles = -1; angles = demuxer_angles_count(demuxer); if ((angles < 1) || (angle > angles)) return -1; demux_flush(demuxer); ris = stream_control(demuxer->stream, STREAM_CTRL_SET_ANGLE, &angle); if (ris == STREAM_UNSUPPORTED) return -1; demux_control(demuxer, DEMUXER_CTRL_RESYNC, NULL); return angle; } int demuxer_audio_track_by_lang_and_default(struct demuxer *d, char **langt) { int n = 0; while (1) { char *lang = langt ? langt[n++] : NULL; int id = -1; for (int i = 0; i < MAX_A_STREAMS; i++) { struct sh_audio *sh = d->a_streams[i]; if (sh && (!lang || sh->lang && !strcmp(lang, sh->lang))) { if (sh->default_track) return sh->aid; if (id < 0) id = sh->aid; } } if (id >= 0) return id; if (!lang) return -1; } } int demuxer_sub_track_by_lang_and_default(struct demuxer *d, char **langt) { int n = 0; while (1) { char *lang = langt ? langt[n++] : NULL; int id = -1; for (int i = 0; i < MAX_S_STREAMS; i++) { struct sh_sub *sh = d->s_streams[i]; if (sh && (!lang || sh->lang && !strcmp(lang, sh->lang))) { if (sh->default_track) return sh->sid; if (id < 0) id = sh->sid; } } if (!lang) return -1; if (id >= 0) return id; } }