@@ -67,6 +67,7 @@ version <next>:

 - gradfun filter added

 - AMR-WB decoder

 - replace the ocv_smooth filter with a more generic ocv filter

+- Windows Televison (WTV) demuxer

 version 0.6:

@@ -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

@@ -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

@@ -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);

new file mode 100644

@@ -0,0 +1,551 @@

+/*

+ * Windows Television (WTV) demuxer

+ * Copyright (c) 2010 Peter Ross <pross@xvid.org>

+ *

+ * 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 <pross@xvid.org>

+ */

+

+#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,

+};