static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr) { WtvContext *wtv = s->priv_data; AVIOContext *pb = wtv->pb; while (!url_feof(pb)) { ff_asf_guid g; int len, sid, consumed; ff_get_guid(pb, &g); len = avio_rl32(pb); if (len < 32) break; sid = avio_rl32(pb) & 0x7FFF; avio_skip(pb, 8); consumed = 32; if (!ff_guidcmp(g, ff_SBE2_STREAM_DESC_EVENT)) { if (ff_find_stream_index(s, sid) < 0) { ff_asf_guid mediatype, subtype, formattype; int size; avio_skip(pb, 28); ff_get_guid(pb, &mediatype); ff_get_guid(pb, &subtype); avio_skip(pb, 12); ff_get_guid(pb, &formattype); size = avio_rl32(pb); parse_media_type(s, 0, sid, mediatype, subtype, formattype, size); consumed += 92 + size; } } else if (!ff_guidcmp(g, ff_stream2_guid)) { int stream_index = ff_find_stream_index(s, sid); if (stream_index >= 0 && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) { ff_asf_guid mediatype, subtype, formattype; int size; avio_skip(pb, 12); ff_get_guid(pb, &mediatype); ff_get_guid(pb, &subtype); avio_skip(pb, 12); ff_get_guid(pb, &formattype); size = avio_rl32(pb); parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size); consumed += 76 + size; } } else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) || !ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) || !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) || !ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) || !ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) || !ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) { int stream_index = ff_find_stream_index(s, sid); if (stream_index >= 0) { AVStream *st = s->streams[stream_index]; uint8_t buf[258]; const uint8_t *pbuf = buf; int buf_size; avio_skip(pb, 8); consumed += 8; if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) || !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) { avio_skip(pb, 6); consumed += 6; } buf_size = FFMIN(len - consumed, sizeof(buf)); avio_read(pb, buf, buf_size); consumed += buf_size; ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL); } } else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) { int stream_index = ff_find_stream_index(s, sid); if (stream_index >= 0) { AVStream *st = s->streams[stream_index]; int audio_type; avio_skip(pb, 8); audio_type = avio_r8(pb); if (audio_type == 2) st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED; else if (audio_type == 3) st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; consumed += 9; } } else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) { int stream_index = ff_find_stream_index(s, sid); if (stream_index >= 0) { avio_skip(pb, 12); if (avio_rl32(pb)) av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index); consumed += 16; } } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) { int stream_index = ff_find_stream_index(s, sid); if (stream_index >= 0) { AVStream *st = s->streams[stream_index]; uint8_t language[4]; avio_skip(pb, 12); avio_read(pb, language, 3); if (language[0]) { language[3] = 0; av_dict_set(&st->metadata, "language", language, 0); if (!strcmp(language, "nar") || !strcmp(language, "NAR")) st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; } consumed += 15; } } else if (!ff_guidcmp(g, ff_timestamp_guid)) { int stream_index = ff_find_stream_index(s, sid); if (stream_index >= 0) { avio_skip(pb, 8); wtv->pts = avio_rl64(pb); consumed += 16; if (wtv->pts == -1) wtv->pts = AV_NOPTS_VALUE; else { wtv->last_valid_pts = wtv->pts; if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch) wtv->epoch = wtv->pts; if (mode == SEEK_TO_PTS && wtv->pts >= seekts) { avio_skip(pb, WTV_PAD8(len) - consumed); return 0; } } } } else if (!ff_guidcmp(g, ff_data_guid)) { int stream_index = ff_find_stream_index(s, sid); if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32 && s->streams[stream_index]->priv_data) { WtvStream *wst = s->streams[stream_index]->priv_data; wst->seen_data = 1; if (len_ptr) { *len_ptr = len; } return stream_index; } } else if (!ff_guidcmp(g, /* DSATTRIB_WMDRMProtectionInfo */ (const ff_asf_guid){0x83,0x95,0x74,0x40,0x9D,0x6B,0xEC,0x4E,0xB4,0x3C,0x67,0xA1,0x80,0x1E,0x1A,0x9B})) { int stream_index = ff_find_stream_index(s, sid); if (stream_index >= 0) av_log(s, AV_LOG_WARNING, "encrypted stream detected (st:%d), decoding will likely fail\n", stream_index); } else if ( !ff_guidcmp(g, /* DSATTRIB_CAPTURE_STREAMTIME */ (const ff_asf_guid){0x14,0x56,0x1A,0x0C,0xCD,0x30,0x40,0x4F,0xBC,0xBF,0xD0,0x3E,0x52,0x30,0x62,0x07}) || !ff_guidcmp(g, /* DSATTRIB_PBDATAG_ATTRIBUTE */ (const ff_asf_guid){0x79,0x66,0xB5,0xE0,0xB9,0x12,0xCC,0x43,0xB7,0xDF,0x57,0x8C,0xAA,0x5A,0x7B,0x63}) || !ff_guidcmp(g, /* DSATTRIB_PicSampleSeq */ (const ff_asf_guid){0x02,0xAE,0x5B,0x2F,0x8F,0x7B,0x60,0x4F,0x82,0xD6,0xE4,0xEA,0x2F,0x1F,0x4C,0x99}) || !ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ ff_DSATTRIB_TRANSPORT_PROPERTIES) || !ff_guidcmp(g, /* dvr_ms_vid_frame_rep_data */ (const ff_asf_guid){0xCC,0x32,0x64,0xDD,0x29,0xE2,0xDB,0x40,0x80,0xF6,0xD2,0x63,0x28,0xD2,0x76,0x1F}) || !ff_guidcmp(g, /* EVENTID_ChannelChangeSpanningEvent */ (const ff_asf_guid){0xE5,0xC5,0x67,0x90,0x5C,0x4C,0x05,0x42,0x86,0xC8,0x7A,0xFE,0x20,0xFE,0x1E,0xFA}) || !ff_guidcmp(g, /* EVENTID_ChannelInfoSpanningEvent */ (const ff_asf_guid){0x80,0x6D,0xF3,0x41,0x32,0x41,0xC2,0x4C,0xB1,0x21,0x01,0xA4,0x32,0x19,0xD8,0x1B}) || !ff_guidcmp(g, /* EVENTID_ChannelTypeSpanningEvent */ (const ff_asf_guid){0x51,0x1D,0xAB,0x72,0xD2,0x87,0x9B,0x48,0xBA,0x11,0x0E,0x08,0xDC,0x21,0x02,0x43}) || !ff_guidcmp(g, /* EVENTID_PIDListSpanningEvent */ (const ff_asf_guid){0x65,0x8F,0xFC,0x47,0xBB,0xE2,0x34,0x46,0x9C,0xEF,0xFD,0xBF,0xE6,0x26,0x1D,0x5C}) || !ff_guidcmp(g, /* EVENTID_SignalAndServiceStatusSpanningEvent */ (const ff_asf_guid){0xCB,0xC5,0x68,0x80,0x04,0x3C,0x2B,0x49,0xB4,0x7D,0x03,0x08,0x82,0x0D,0xCE,0x51}) || !ff_guidcmp(g, /* EVENTID_StreamTypeSpanningEvent */ (const ff_asf_guid){0xBC,0x2E,0xAF,0x82,0xA6,0x30,0x64,0x42,0xA8,0x0B,0xAD,0x2E,0x13,0x72,0xAC,0x60}) || !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) || !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) || !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) || !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) || !ff_guidcmp(g, ff_index_guid) || !ff_guidcmp(g, ff_sync_guid) || !ff_guidcmp(g, ff_stream1_guid) || !ff_guidcmp(g, (const ff_asf_guid){0xF7,0x10,0x02,0xB9,0xEE,0x7C,0xED,0x4E,0xBD,0x7F,0x05,0x40,0x35,0x86,0x18,0xA1})) { //ignore known guids } else av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g)); avio_skip(pb, WTV_PAD8(len) - consumed); } return AVERROR_EOF; }