/* * Windows Television (WTV) demuxer * Copyright (c) 2010 Peter Ross * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * Windows Television (WTV) demuxer * @author Peter Ross */ #include "libavutil/intreadwrite.h" #include "avformat.h" #include "riff.h" #include "asf.h" #include "mpegts.h" /* Macros for formating GUIDs */ #define PRI_GUID \ "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x" #define ARG_GUID(g) \ g[0],g[1],g[2],g[3],g[4],g[5],g[6],g[7],g[8],g[9],g[10],g[11],g[12],g[13],g[14],g[15] typedef struct { int seen_data; } WtvStream; typedef struct WtvContext { uint64_t pts; } WtvContext; static int is_zero(uint8_t *v, int n) { int i; for (i = 0; i < n; i++) if (v[i]) return 0; return 1; } typedef struct { enum CodecID id; ff_asf_guid guid; } AVCodecGuid; static enum CodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid) { int i; for (i = 0; guids[i].id != CODEC_ID_NONE; i++) { if (!ff_guidcmp(guids[i].guid, guid)) return guids[i].id; } return CODEC_ID_NONE; } /* WTV GUIDs */ static const ff_asf_guid wtv_guid = {0xB7,0xD8,0x00,0x20,0x37,0x49,0xDA,0x11,0xA6,0x4E,0x00,0x07,0xE9,0x5E,0xAD,0x8D}; static const ff_asf_guid meta_guid = {0x5A,0xFE,0xD7,0x6D,0xC8,0x1D,0x8F,0x4A,0x99,0x22,0xFA,0xB1,0x1C,0x38,0x14,0x53}; static const ff_asf_guid timestamp_guid = {0x5B,0x05,0xE6,0x1B,0x97,0xA9,0x49,0x43,0x88,0x17,0x1A,0x65,0x5A,0x29,0x8A,0x97}; static const ff_asf_guid data_guid = {0x95,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}; static const ff_asf_guid stream_guid = {0xED,0xA4,0x13,0x23,0x2D,0xBF,0x4F,0x45,0xAD,0x8A,0xD9,0x5B,0xA7,0xF9,0x1F,0xEE}; static const ff_asf_guid stream2_guid = {0xA2,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}; static const ff_asf_guid EVENTID_SubtitleSpanningEvent = {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A}; static const ff_asf_guid EVENTID_LanguageSpanningEvent = {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95}; static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent = {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E}; static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent = {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24}; static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent = {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66}; static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent = {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B}; static const ff_asf_guid EVENTID_StreamIDSpanningEvent = {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE}; static const ff_asf_guid EVENTID_TeletextSpanningEvent = {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3}; /* Windows media GUIDs */ #define MEDIASUBTYPE_BASE_GUID \ 0x00,0x00,0x10,0x00,0x80,0x00,0x00,0xAA,0x00,0x38,0x9B,0x71 /* Media types */ static const ff_asf_guid mediatype_audio = {'a','u','d','s',MEDIASUBTYPE_BASE_GUID}; static const ff_asf_guid mediatype_video = {'v','i','d','s',MEDIASUBTYPE_BASE_GUID}; static const ff_asf_guid mediasubtype_mpeg1payload = {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70}; static const ff_asf_guid mediatype_mpeg2_sections = {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5}; static const ff_asf_guid mediatype_mpeg2_pes = {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}; static const ff_asf_guid mediatype_mstvcaption = {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1}; /* Media subtypes */ static const ff_asf_guid mediasubtype_cpfilters_processed = {0x28,0xBD,0xAD,0x46,0xD0,0x6F,0x96,0x47,0x93,0xB2,0x15,0x5C,0x51,0xDC,0x04,0x8D}; static const ff_asf_guid mediasubtype_dvb_subtitle = {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F}; static const ff_asf_guid mediasubtype_teletext = {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA}; static const ff_asf_guid mediasubtype_dtvccdata = {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A}; static const ff_asf_guid mediasubtype_mpeg2_sections = {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61}; /* Formats */ static const ff_asf_guid format_cpfilters_processed = {0x6F,0xB3,0x39,0x67,0x5F,0x1D,0xC2,0x4A,0x81,0x92,0x28,0xBB,0x0E,0x73,0xD1,0x6A}; static const ff_asf_guid format_waveformatex = {0x81,0x9F,0x58,0x05,0x56,0xC3,0xCE,0x11,0xBF,0x01,0x00,0xAA,0x00,0x55,0x59,0x5A}; static const ff_asf_guid format_videoinfo2 = {0xA0,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA}; static const ff_asf_guid format_mpeg2_video = {0xE3,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}; static const ff_asf_guid format_none = {0xD6,0x17,0x64,0x0F,0x18,0xC3,0xD0,0x11,0xA4,0x3F,0x00,0xA0,0xC9,0x22,0x31,0x96}; static const AVCodecGuid video_guids[] = { {CODEC_ID_MPEG2VIDEO, {0x26,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}}, {CODEC_ID_NONE} }; static const AVCodecGuid audio_guids[] = { {CODEC_ID_AC3, {0x2C,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}}, {CODEC_ID_EAC3, {0xAF,0x87,0xFB,0xA7,0x02,0x2D,0xFB,0x42,0xA4,0xD4,0x05,0xCD,0x93,0x84,0x3B,0xDD}}, {CODEC_ID_MP2, {0x2B,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}}, {CODEC_ID_NONE} }; static int read_probe(AVProbeData *p) { return ff_guidcmp(p->buf, wtv_guid) ? 0 : AVPROBE_SCORE_MAX; } /** * parse VIDEOINFOHEADER2 structure * @return bytes consumed */ static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st) { ByteIOContext *pb = s->pb; url_fskip(pb, 72); // picture aspect ratio is unreliable ff_get_bmp_header(pb, st); return 72 + 40; } /** * Parse MPEG1WAVEFORMATEX extradata structure */ static void parse_mpeg1waveformatex(AVStream *st) { /* fwHeadLayer */ switch (AV_RL16(st->codec->extradata)) { case 0x0001 : st->codec->codec_id = CODEC_ID_MP1; break; case 0x0002 : st->codec->codec_id = CODEC_ID_MP2; break; case 0x0004 : st->codec->codec_id = CODEC_ID_MP3; break; } st->codec->bit_rate = AV_RL32(st->codec->extradata + 2); /* dwHeadBitrate */ /* dwHeadMode */ switch (AV_RL16(st->codec->extradata + 6)) { case 1 : case 2 : case 4 : st->codec->channels = 2; break; case 8 : st->codec->channels = 1; break; } } /** * Initialise stream * @param st Stream to initialise, or NULL to create and initialise new stream * @return NULL on error */ static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type) { if (st) { if (st->codec->extradata) { av_freep(&st->codec->extradata); st->codec->extradata_size = 0; } } else { WtvStream *wst = av_mallocz(sizeof(WtvStream)); if (!wst) return NULL; st = av_new_stream(s, sid); if (!st) return NULL; st->priv_data = wst; } st->codec->codec_type = codec_type; st->need_parsing = AVSTREAM_PARSE_FULL; av_set_pts_info(st, 64, 1, 10000000); return st; } /** * parse Media Type structure and populate stream * @param st Stream, or NULL to create new stream * @param mediatype Mediatype GUID * @param subtype Subtype GUID * @param formattype Format GUID * @param size Size of format buffer * @return NULL on error */ static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid, ff_asf_guid mediatype, ff_asf_guid subtype, ff_asf_guid formattype, int size) { ByteIOContext *pb = s->pb; if (!ff_guidcmp(subtype, mediasubtype_cpfilters_processed) && !ff_guidcmp(formattype, format_cpfilters_processed)) { ff_asf_guid actual_subtype; ff_asf_guid actual_formattype; if (size < 32) { av_log(s, AV_LOG_WARNING, "format buffer size underflow\n"); url_fskip(pb, size); return NULL; } url_fskip(pb, size - 32); ff_get_guid(pb, &actual_subtype); ff_get_guid(pb, &actual_formattype); url_fseek(pb, -size, SEEK_CUR); st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32); url_fskip(pb, 32); return st; } else if (!ff_guidcmp(mediatype, mediatype_audio)) { st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO); if (!st) return NULL; if (!ff_guidcmp(formattype, format_waveformatex)) { ff_get_wav_header(pb, st->codec, size); } else { if (ff_guidcmp(formattype, format_none)) av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); url_fskip(pb, size); } if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) { st->codec->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codec->bits_per_coded_sample); } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) { if (st->codec->extradata && st->codec->extradata_size >= 22) parse_mpeg1waveformatex(st); else av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n"); } else { st->codec->codec_id = ff_codec_guid_get_id(audio_guids, subtype); if (st->codec->codec_id == CODEC_ID_NONE) av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype)); } return st; } else if (!ff_guidcmp(mediatype, mediatype_video)) { st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO); if (!st) return NULL; if (!ff_guidcmp(formattype, format_videoinfo2)) { int consumed = parse_videoinfoheader2(s, st); url_fskip(pb, FFMAX(size - consumed, 0)); } else if (!ff_guidcmp(formattype, format_mpeg2_video)) { int consumed = parse_videoinfoheader2(s, st); url_fskip(pb, FFMAX(size - consumed, 0)); } else { if (ff_guidcmp(formattype, format_none)) av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); url_fskip(pb, size); } if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) { st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype)); } else { st->codec->codec_id = ff_codec_guid_get_id(video_guids, subtype); } if (st->codec->codec_id == CODEC_ID_NONE) av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype)); return st; } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) && !ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) { st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE); if (!st) return NULL; if (ff_guidcmp(formattype, format_none)) av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); url_fskip(pb, size); st->codec->codec_id = CODEC_ID_DVB_SUBTITLE; return st; } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) && (!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) { st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE); if (!st) return NULL; if (ff_guidcmp(formattype, format_none)) av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); url_fskip(pb, size); st->codec->codec_id = CODEC_ID_DVB_TELETEXT; return st; } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) && !ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) { if (ff_guidcmp(formattype, format_none)) av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); url_fskip(pb, size); return NULL; } av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"PRI_GUID ", subtype:"PRI_GUID", formattype:"PRI_GUID"\n", ARG_GUID(mediatype), ARG_GUID(subtype), ARG_GUID(formattype)); url_fskip(pb, size); return NULL; } enum { SEEK_TO_DATA = 0, SEEK_TO_BYTE, SEEK_TO_PTS, }; /** * Parse WTV chunks * @param mode SEEK_TO_DATA, SEEK_TO_BYTE, SEEK_TO_PTS * @param seekts either byte position or timestamp * @param[out] len Length of data chunk * @return stream index of data chunk, or <0 on error */ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr) { WtvContext *wtv = s->priv_data; ByteIOContext *pb = s->pb; while (!url_feof(pb)) { ff_asf_guid g; int len, sid, consumed; if (mode == SEEK_TO_BYTE && url_ftell(pb) >= seekts) return 0; ff_get_guid(pb, &g); if (is_zero(g, sizeof(ff_asf_guid))) return AVERROR_EOF; len = get_le32(pb); if (len < 32) break; sid = get_le32(pb) & 0x7FFF; url_fskip(pb, 8); consumed = 32; if (!ff_guidcmp(g, stream_guid)) { if (ff_find_stream_index(s, sid) < 0) { ff_asf_guid mediatype, subtype, formattype; int size; consumed += 20; url_fskip(pb, 16); if (get_le32(pb)) { url_fskip(pb, 8); ff_get_guid(pb, &mediatype); ff_get_guid(pb, &subtype); url_fskip(pb, 12); ff_get_guid(pb, &formattype); size = get_le32(pb); parse_media_type(s, 0, sid, mediatype, subtype, formattype, size); consumed += 72 + size; } } } else if (!ff_guidcmp(g, 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; url_fskip(pb, 12); ff_get_guid(pb, &mediatype); ff_get_guid(pb, &subtype); url_fskip(pb, 12); ff_get_guid(pb, &formattype); size = get_le32(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; url_fskip(pb, 8); consumed += 8; if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) || !ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) { url_fskip(pb, 6); consumed += 6; } buf_size = FFMIN(len - consumed, sizeof(buf)); get_buffer(pb, buf, buf_size); consumed += buf_size; ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, 0, 0, 0, 0); } } else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) { int stream_index = ff_find_stream_index(s, sid); if (stream_index >= 0) { url_fskip(pb, 12); if (get_le32(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]; url_fskip(pb, 12); get_buffer(pb, language, 3); if (language[0]) { language[3] = 0; av_metadata_set2(&st->metadata, "language", language, 0); } consumed += 15; } } else if (!ff_guidcmp(g, timestamp_guid)) { int stream_index = ff_find_stream_index(s, sid); if (stream_index >= 0) { url_fskip(pb, 8); wtv->pts = get_le64(pb); consumed += 16; if (wtv->pts == -1) wtv->pts = AV_NOPTS_VALUE; if (mode == SEEK_TO_PTS && wtv->pts >= seekts) { #define WTV_PAD8(x) (((x) + 7) & ~7) url_fskip(pb, WTV_PAD8(len) - consumed); return 0; } } } else if (!ff_guidcmp(g, data_guid)) { int stream_index = ff_find_stream_index(s, sid); if (mode == SEEK_TO_DATA && stream_index >= 0) { WtvStream *wst = s->streams[stream_index]->priv_data; wst->seen_data = 1; if (len_ptr) { *len_ptr = len; } if (wtv->pts != AV_NOPTS_VALUE) av_add_index_entry(s->streams[stream_index], url_ftell(pb) - consumed, wtv->pts, 0, 0, AVINDEX_KEYFRAME); return 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_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 */ (const ff_asf_guid){0x12,0xF6,0x22,0xB6,0xAD,0x47,0x71,0x46,0xAD,0x6C,0x05,0xA9,0x8E,0x65,0xDE,0x3A}) || !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_AudioTypeSpanningEvent */ (const ff_asf_guid){0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3}) || !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, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || !ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || !ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) { //ignore known guids } else av_log(s, AV_LOG_WARNING, "unsupported chunk:"PRI_GUID"\n", ARG_GUID(g)); url_fskip(pb, WTV_PAD8(len) - consumed); } return AVERROR_EOF; } #define WTV_CHUNK_START 0x40000 static int read_header(AVFormatContext *s, AVFormatParameters *ap) { ByteIOContext *pb = s->pb; int ret; url_fseek(pb, WTV_CHUNK_START, SEEK_SET); ret = parse_chunks(s, SEEK_TO_DATA, 0, 0); if (ret < 0) return ret; url_fseek(pb, -32, SEEK_CUR); return 0; } static int read_packet(AVFormatContext *s, AVPacket *pkt) { WtvContext *wtv = s->priv_data; ByteIOContext *pb = s->pb; int stream_index, len, ret; stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len); if (stream_index < 0) return stream_index; ret = av_get_packet(pb, pkt, len - 32); if (ret < 0) return ret; pkt->stream_index = stream_index; pkt->pts = wtv->pts; url_fskip(pb, WTV_PAD8(len) - len); return 0; } static int read_seek2(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags) { WtvContext *wtv = s->priv_data; ByteIOContext *pb = s->pb; AVStream *st; int i; if (stream_index < 0) { stream_index = av_find_default_stream_index(s); if (stream_index < 0) return -1; } st = s->streams[stream_index]; if ((flags & AVSEEK_FLAG_FRAME)) { return AVERROR_NOTSUPP; } else if ((flags & AVSEEK_FLAG_BYTE)) { if (ts < url_ftell(pb)) { for (i = st->nb_index_entries - 1; i >= 0; i--) { if (st->index_entries[i].pos <= ts) { wtv->pts = st->index_entries[i].timestamp; url_fseek(pb, st->index_entries[i].pos, SEEK_SET); break; } } if (i < 0) { wtv->pts = 0; url_fseek(pb, WTV_CHUNK_START, SEEK_SET); } } if (parse_chunks(s, SEEK_TO_BYTE, ts, 0) < 0) return AVERROR(ERANGE); return 0; } else { ts *= 10; i = av_index_search_timestamp(st, ts, flags); if (i < 0) { if (st->nb_index_entries > 0) { wtv->pts = st->index_entries[st->nb_index_entries - 1].timestamp; url_fseek(pb, st->index_entries[st->nb_index_entries - 1].pos, SEEK_SET); } else { wtv->pts = 0; url_fseek(pb, WTV_CHUNK_START, SEEK_SET); } if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0) return AVERROR(ERANGE); return 0; } wtv->pts = st->index_entries[i].timestamp; url_fseek(pb, st->index_entries[i].pos, SEEK_SET); return 0; } } AVInputFormat ff_wtv_demuxer = { .name = "wtv", .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"), .priv_data_size = sizeof(WtvContext), .read_probe = read_probe, .read_header = read_header, .read_packet = read_packet, .read_seek2 = read_seek2, .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT, };