From 82ca054a6345e98794f35681b608675d6c965c3e Mon Sep 17 00:00:00 2001 From: Peter Ross Date: Sun, 26 Dec 2010 01:28:25 +0000 Subject: [PATCH] Windows Televison (WTV) demuxer Originally committed as revision 26094 to svn://svn.ffmpeg.org/ffmpeg/trunk --- Changelog | 1 + doc/general.texi | 1 + libavformat/Makefile | 1 + libavformat/allformats.c | 1 + libavformat/wtv.c | 551 +++++++++++++++++++++++++++++++++++++++ 5 files changed, 555 insertions(+) create mode 100644 libavformat/wtv.c diff --git a/Changelog b/Changelog index c09d57b83c..d12ea427ef 100644 --- a/Changelog +++ b/Changelog @@ -67,6 +67,7 @@ version : - gradfun filter added - AMR-WB decoder - replace the ocv_smooth filter with a more generic ocv filter +- Windows Televison (WTV) demuxer version 0.6: diff --git a/doc/general.texi b/doc/general.texi index 60bce2ed26..a837098295 100644 --- a/doc/general.texi +++ b/doc/general.texi @@ -244,6 +244,7 @@ library: @item WAV @tab X @tab X @item WavPack @tab @tab X @item WebM @tab X @tab X +@item Windows Televison (WTV) @tab @tab X @item Wing Commander III movie @tab @tab X @tab Multimedia format used in Origin's Wing Commander III computer game. @item Westwood Studios audio @tab @tab X diff --git a/libavformat/Makefile b/libavformat/Makefile index 5feb0ecc32..4cd7a2b476 100644 --- a/libavformat/Makefile +++ b/libavformat/Makefile @@ -290,6 +290,7 @@ OBJS-$(CONFIG_WEBM_MUXER) += matroskaenc.o matroska.o \ flacenc_header.o avlanguage.o OBJS-$(CONFIG_WSAUD_DEMUXER) += westwood.o OBJS-$(CONFIG_WSVQA_DEMUXER) += westwood.o +OBJS-$(CONFIG_WTV_DEMUXER) += wtv.o asf.o asfdec.o riff.o OBJS-$(CONFIG_WV_DEMUXER) += wv.o apetag.o OBJS-$(CONFIG_XA_DEMUXER) += xa.o OBJS-$(CONFIG_YOP_DEMUXER) += yop.o diff --git a/libavformat/allformats.c b/libavformat/allformats.c index 9662e41f1b..abcbe64629 100644 --- a/libavformat/allformats.c +++ b/libavformat/allformats.c @@ -218,6 +218,7 @@ void av_register_all(void) REGISTER_MUXER (WEBM, webm); REGISTER_DEMUXER (WSAUD, wsaud); REGISTER_DEMUXER (WSVQA, wsvqa); + REGISTER_DEMUXER (WTV, wtv); REGISTER_DEMUXER (WV, wv); REGISTER_DEMUXER (XA, xa); REGISTER_DEMUXER (YOP, yop); diff --git a/libavformat/wtv.c b/libavformat/wtv.c new file mode 100644 index 0000000000..dabea3f872 --- /dev/null +++ b/libavformat/wtv.c @@ -0,0 +1,551 @@ +/* + * 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" + +/* 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 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 subtitle_guid = + {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A}; +static const ff_asf_guid language_guid = + {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95}; + +/* 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, 32); + st->codec->bit_rate = get_le32(pb); + url_fskip(pb, 20); + st->sample_aspect_ratio.num = get_le32(pb); + st->sample_aspect_ratio.den = get_le32(pb); + url_fskip(pb, 8); + 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; + } +} + +static AVStream * new_stream(AVFormatContext *s, int sid, int codec_type) +{ + AVStream * st = av_new_stream(s, sid); + if (!st) + return NULL; + 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 create new streams as required + * @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, int sid, + ff_asf_guid mediatype, ff_asf_guid subtype, + ff_asf_guid formattype, int size) +{ + ByteIOContext *pb = s->pb; + AVStream *st; + 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, 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, 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, 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, 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, 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; +} + +/** + * Read three byte language code + */ +static void get_language(ByteIOContext *pb, AVStream *st) +{ + uint8_t language[4]; + get_buffer(pb, language, 3); + if (language[0]) { + language[3] = 0; + av_metadata_set2(&st->metadata, "language", language, 0); + } +} + +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); + 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, sid, mediatype, subtype, formattype, size); + consumed += 72 + size; + } + } + } else if (!ff_guidcmp(g, subtitle_guid)) { + int stream_index = ff_find_stream_index(s, sid); + if (stream_index >= 0) { + AVStream *st = s->streams[stream_index]; + + url_fskip(pb, 10); + get_language(pb, st); + url_fskip(pb, 1); + + st->codec->extradata = av_malloc(4); + if (!st->codec->extradata) + return AVERROR(ENOMEM); + st->codec->extradata_size = get_buffer(pb, st->codec->extradata, 4); + consumed += 18; + } + } else if (!ff_guidcmp(g, language_guid)) { + int stream_index = ff_find_stream_index(s, sid); + if (stream_index >= 0) { + AVStream *st = s->streams[stream_index]; + url_fskip(pb, 12); + get_language(pb, st); + consumed += 15; + } + } else if (!ff_guidcmp(g, timestamp_guid)) { + 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) { + 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_AudioDescriptorSpanningEvent */ (const ff_asf_guid){0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E}) || + !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_CtxADescriptorSpanningEvent */ (const ff_asf_guid){0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24}) || + !ff_guidcmp(g, /* EVENTID_DVBScramblingControlSpanningEvent */ (const ff_asf_guid){0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B}) || + !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_StreamIDSpanningEvent */ (const ff_asf_guid){0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE}) || + !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, /* EVENTID_TeletextSpanningEvent */ (const ff_asf_guid){0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3}) || + !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}) || + !ff_guidcmp(g, (const ff_asf_guid){0xA2,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) { + //ignore known guids + } else + av_log(s, AV_LOG_WARNING, "unsuported 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 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, +};