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607 lines
25 KiB
607 lines
25 KiB
/* |
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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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#include "mpegts.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 { |
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int seen_data; |
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} WtvStream; |
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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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|
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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 stream2_guid = |
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{0xA2,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}; |
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static const ff_asf_guid EVENTID_SubtitleSpanningEvent = |
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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 EVENTID_LanguageSpanningEvent = |
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{0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95}; |
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static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent = |
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{0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E}; |
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static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent = |
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{0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24}; |
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static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent = |
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{0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66}; |
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static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent = |
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{0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B}; |
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static const ff_asf_guid EVENTID_StreamIDSpanningEvent = |
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{0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE}; |
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static const ff_asf_guid EVENTID_TeletextSpanningEvent = |
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{0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3}; |
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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, 72); // picture aspect ratio is unreliable |
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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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/** |
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* Initialise stream |
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* @param st Stream to initialise, or NULL to create and initialise new stream |
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* @return NULL on error |
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*/ |
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static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type) |
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{ |
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if (st) { |
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if (st->codec->extradata) { |
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av_freep(&st->codec->extradata); |
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st->codec->extradata_size = 0; |
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} |
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} else { |
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WtvStream *wst = av_mallocz(sizeof(WtvStream)); |
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if (!wst) |
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return NULL; |
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st = av_new_stream(s, sid); |
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if (!st) |
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return NULL; |
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st->priv_data = wst; |
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} |
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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 populate stream |
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* @param st Stream, or NULL to create new stream |
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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, AVStream *st, 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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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, st, 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, st, 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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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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} |
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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, st, 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, st, 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, st, 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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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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if (len < 32) |
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break; |
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sid = get_le32(pb) & 0x7FFF; |
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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 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, |
|
};
|
|
|