mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
552 lines
22 KiB
C
552 lines
22 KiB
C
/*
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* Windows Television (WTV) demuxer
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* Copyright (c) 2010 Peter Ross <pross@xvid.org>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Windows Television (WTV) demuxer
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* @author Peter Ross <pross@xvid.org>
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*/
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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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#include "riff.h"
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#include "asf.h"
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/* Macros for formating GUIDs */
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#define PRI_GUID \
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"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
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#define ARG_GUID(g) \
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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]
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typedef struct WtvContext {
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uint64_t pts;
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} WtvContext;
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static int is_zero(uint8_t *v, int n)
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{
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int i;
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for (i = 0; i < n; i++)
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if (v[i]) return 0;
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return 1;
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}
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typedef struct {
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enum CodecID id;
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ff_asf_guid guid;
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} AVCodecGuid;
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static enum CodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
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{
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int i;
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for (i = 0; guids[i].id != CODEC_ID_NONE; i++) {
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if (!ff_guidcmp(guids[i].guid, guid))
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return guids[i].id;
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}
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return CODEC_ID_NONE;
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}
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/* WTV GUIDs */
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static const ff_asf_guid wtv_guid =
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{0xB7,0xD8,0x00,0x20,0x37,0x49,0xDA,0x11,0xA6,0x4E,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
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static const ff_asf_guid meta_guid =
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{0x5A,0xFE,0xD7,0x6D,0xC8,0x1D,0x8F,0x4A,0x99,0x22,0xFA,0xB1,0x1C,0x38,0x14,0x53};
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static const ff_asf_guid timestamp_guid =
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{0x5B,0x05,0xE6,0x1B,0x97,0xA9,0x49,0x43,0x88,0x17,0x1A,0x65,0x5A,0x29,0x8A,0x97};
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static const ff_asf_guid data_guid =
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{0x95,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
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static const ff_asf_guid stream_guid =
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{0xED,0xA4,0x13,0x23,0x2D,0xBF,0x4F,0x45,0xAD,0x8A,0xD9,0x5B,0xA7,0xF9,0x1F,0xEE};
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static const ff_asf_guid subtitle_guid =
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{0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
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static const ff_asf_guid language_guid =
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{0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
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/* Windows media GUIDs */
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#define MEDIASUBTYPE_BASE_GUID \
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0x00,0x00,0x10,0x00,0x80,0x00,0x00,0xAA,0x00,0x38,0x9B,0x71
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/* Media types */
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static const ff_asf_guid mediatype_audio =
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{'a','u','d','s',MEDIASUBTYPE_BASE_GUID};
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static const ff_asf_guid mediatype_video =
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{'v','i','d','s',MEDIASUBTYPE_BASE_GUID};
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static const ff_asf_guid mediasubtype_mpeg1payload =
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{0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
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static const ff_asf_guid mediatype_mpeg2_sections =
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{0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
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static const ff_asf_guid mediatype_mpeg2_pes =
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{0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
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static const ff_asf_guid mediatype_mstvcaption =
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{0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
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/* Media subtypes */
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static const ff_asf_guid mediasubtype_cpfilters_processed =
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{0x28,0xBD,0xAD,0x46,0xD0,0x6F,0x96,0x47,0x93,0xB2,0x15,0x5C,0x51,0xDC,0x04,0x8D};
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static const ff_asf_guid mediasubtype_dvb_subtitle =
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{0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
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static const ff_asf_guid mediasubtype_teletext =
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{0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
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static const ff_asf_guid mediasubtype_dtvccdata =
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{0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
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static const ff_asf_guid mediasubtype_mpeg2_sections =
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{0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
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/* Formats */
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static const ff_asf_guid format_cpfilters_processed =
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{0x6F,0xB3,0x39,0x67,0x5F,0x1D,0xC2,0x4A,0x81,0x92,0x28,0xBB,0x0E,0x73,0xD1,0x6A};
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static const ff_asf_guid format_waveformatex =
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{0x81,0x9F,0x58,0x05,0x56,0xC3,0xCE,0x11,0xBF,0x01,0x00,0xAA,0x00,0x55,0x59,0x5A};
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static const ff_asf_guid format_videoinfo2 =
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{0xA0,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
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static const ff_asf_guid format_mpeg2_video =
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{0xE3,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
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static const ff_asf_guid format_none =
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{0xD6,0x17,0x64,0x0F,0x18,0xC3,0xD0,0x11,0xA4,0x3F,0x00,0xA0,0xC9,0x22,0x31,0x96};
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static const AVCodecGuid video_guids[] = {
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{CODEC_ID_MPEG2VIDEO, {0x26,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
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{CODEC_ID_NONE}
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};
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static const AVCodecGuid audio_guids[] = {
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{CODEC_ID_AC3, {0x2C,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
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{CODEC_ID_EAC3, {0xAF,0x87,0xFB,0xA7,0x02,0x2D,0xFB,0x42,0xA4,0xD4,0x05,0xCD,0x93,0x84,0x3B,0xDD}},
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{CODEC_ID_MP2, {0x2B,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
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{CODEC_ID_NONE}
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};
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static int read_probe(AVProbeData *p)
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{
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return ff_guidcmp(p->buf, wtv_guid) ? 0 : AVPROBE_SCORE_MAX;
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}
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/**
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* parse VIDEOINFOHEADER2 structure
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* @return bytes consumed
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*/
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static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
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{
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ByteIOContext *pb = s->pb;
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url_fskip(pb, 32);
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st->codec->bit_rate = get_le32(pb);
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url_fskip(pb, 20);
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st->sample_aspect_ratio.num = get_le32(pb);
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st->sample_aspect_ratio.den = get_le32(pb);
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url_fskip(pb, 8);
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ff_get_bmp_header(pb, st);
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return 72 + 40;
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}
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/**
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* Parse MPEG1WAVEFORMATEX extradata structure
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*/
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static void parse_mpeg1waveformatex(AVStream *st)
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{
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/* fwHeadLayer */
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switch (AV_RL16(st->codec->extradata)) {
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case 0x0001 : st->codec->codec_id = CODEC_ID_MP1; break;
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case 0x0002 : st->codec->codec_id = CODEC_ID_MP2; break;
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case 0x0004 : st->codec->codec_id = CODEC_ID_MP3; break;
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}
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st->codec->bit_rate = AV_RL32(st->codec->extradata + 2); /* dwHeadBitrate */
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/* dwHeadMode */
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switch (AV_RL16(st->codec->extradata + 6)) {
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case 1 : case 2 : case 4 : st->codec->channels = 2; break;
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case 8 : st->codec->channels = 1; break;
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}
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}
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static AVStream * new_stream(AVFormatContext *s, int sid, int codec_type)
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{
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AVStream * st = av_new_stream(s, sid);
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if (!st)
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return NULL;
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st->codec->codec_type = codec_type;
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st->need_parsing = AVSTREAM_PARSE_FULL;
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av_set_pts_info(st, 64, 1, 10000000);
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return st;
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}
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/**
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* parse Media Type structure and create new streams as required
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* @param mediatype Mediatype GUID
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* @param subtype Subtype GUID
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* @param formattype Format GUID
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* @param size Size of format buffer
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* @return NULL on error
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*/
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static AVStream * parse_media_type(AVFormatContext *s, int sid,
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ff_asf_guid mediatype, ff_asf_guid subtype,
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ff_asf_guid formattype, int size)
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{
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ByteIOContext *pb = s->pb;
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AVStream *st;
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if (!ff_guidcmp(subtype, mediasubtype_cpfilters_processed) &&
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!ff_guidcmp(formattype, format_cpfilters_processed)) {
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ff_asf_guid actual_subtype;
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ff_asf_guid actual_formattype;
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if (size < 32) {
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av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
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url_fskip(pb, size);
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return NULL;
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}
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url_fskip(pb, size - 32);
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ff_get_guid(pb, &actual_subtype);
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ff_get_guid(pb, &actual_formattype);
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url_fseek(pb, -size, SEEK_CUR);
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st = parse_media_type(s, sid, mediatype, actual_subtype, actual_formattype, size - 32);
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url_fskip(pb, 32);
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return st;
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} else if (!ff_guidcmp(mediatype, mediatype_audio)) {
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st = new_stream(s, sid, AVMEDIA_TYPE_AUDIO);
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if (!st)
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return NULL;
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if (!ff_guidcmp(formattype, format_waveformatex)) {
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ff_get_wav_header(pb, st->codec, size);
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} else {
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if (ff_guidcmp(formattype, format_none))
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av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
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url_fskip(pb, size);
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}
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if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) {
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st->codec->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codec->bits_per_coded_sample);
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} else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
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if (st->codec->extradata && st->codec->extradata_size >= 22)
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parse_mpeg1waveformatex(st);
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else
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av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
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} else {
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st->codec->codec_id = ff_codec_guid_get_id(audio_guids, subtype);
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}
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if (st->codec->codec_id == CODEC_ID_NONE)
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av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype));
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return st;
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} else if (!ff_guidcmp(mediatype, mediatype_video)) {
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st = new_stream(s, sid, AVMEDIA_TYPE_VIDEO);
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if (!st)
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return NULL;
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if (!ff_guidcmp(formattype, format_videoinfo2)) {
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int consumed = parse_videoinfoheader2(s, st);
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url_fskip(pb, FFMAX(size - consumed, 0));
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} else if (!ff_guidcmp(formattype, format_mpeg2_video)) {
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int consumed = parse_videoinfoheader2(s, st);
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url_fskip(pb, FFMAX(size - consumed, 0));
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} else {
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if (ff_guidcmp(formattype, format_none))
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av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
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url_fskip(pb, size);
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}
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if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) {
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st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype));
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} else {
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st->codec->codec_id = ff_codec_guid_get_id(video_guids, subtype);
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}
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if (st->codec->codec_id == CODEC_ID_NONE)
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av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype));
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return st;
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} else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
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!ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) {
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st = new_stream(s, sid, AVMEDIA_TYPE_SUBTITLE);
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if (!st)
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return NULL;
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if (ff_guidcmp(formattype, format_none))
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av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
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url_fskip(pb, size);
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st->codec->codec_id = CODEC_ID_DVB_SUBTITLE;
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return st;
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} else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
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(!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) {
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st = new_stream(s, sid, AVMEDIA_TYPE_SUBTITLE);
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if (!st)
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return NULL;
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if (ff_guidcmp(formattype, format_none))
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av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
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url_fskip(pb, size);
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st->codec->codec_id = CODEC_ID_DVB_TELETEXT;
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return st;
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} else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
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!ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) {
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if (ff_guidcmp(formattype, format_none))
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av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
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url_fskip(pb, size);
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return NULL;
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}
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av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"PRI_GUID
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", subtype:"PRI_GUID", formattype:"PRI_GUID"\n",
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ARG_GUID(mediatype), ARG_GUID(subtype), ARG_GUID(formattype));
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url_fskip(pb, size);
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return NULL;
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}
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/**
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* Read three byte language code
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*/
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static void get_language(ByteIOContext *pb, AVStream *st)
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{
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uint8_t language[4];
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get_buffer(pb, language, 3);
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if (language[0]) {
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language[3] = 0;
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av_metadata_set2(&st->metadata, "language", language, 0);
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}
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}
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enum {
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SEEK_TO_DATA = 0,
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SEEK_TO_BYTE,
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SEEK_TO_PTS,
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};
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/**
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* Parse WTV chunks
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* @param mode SEEK_TO_DATA, SEEK_TO_BYTE, SEEK_TO_PTS
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* @param seekts either byte position or timestamp
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* @param[out] len Length of data chunk
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* @return stream index of data chunk, or <0 on error
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*/
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static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
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{
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WtvContext *wtv = s->priv_data;
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ByteIOContext *pb = s->pb;
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while (!url_feof(pb)) {
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ff_asf_guid g;
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int len, sid, consumed;
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if (mode == SEEK_TO_BYTE && url_ftell(pb) >= seekts)
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return 0;
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ff_get_guid(pb, &g);
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if (is_zero(g, sizeof(ff_asf_guid)))
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return AVERROR_EOF;
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len = get_le32(pb);
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sid = get_le32(pb) & 0x7FFF;
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url_fskip(pb, 8);
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consumed = 32;
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if (!ff_guidcmp(g, stream_guid)) {
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if (ff_find_stream_index(s, sid) < 0) {
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ff_asf_guid mediatype, subtype, formattype;
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int size;
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consumed += 20;
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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,
|
|
};
|