Windows Televison (WTV) demuxer
[libav.git] / libavformat / wtv.c
CommitLineData
82ca054a
PR
1/*
2 * Windows Television (WTV) demuxer
3 * Copyright (c) 2010 Peter Ross <pross@xvid.org>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22/**
23 * @file
24 * Windows Television (WTV) demuxer
25 * @author Peter Ross <pross@xvid.org>
26 */
27
28#include "libavutil/intreadwrite.h"
29#include "avformat.h"
30#include "riff.h"
31#include "asf.h"
32
33/* Macros for formating GUIDs */
34#define PRI_GUID \
35 "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
36#define ARG_GUID(g) \
37 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]
38
39typedef struct WtvContext {
40 uint64_t pts;
41} WtvContext;
42
43static int is_zero(uint8_t *v, int n)
44{
45 int i;
46 for (i = 0; i < n; i++)
47 if (v[i]) return 0;
48 return 1;
49}
50
51typedef struct {
52 enum CodecID id;
53 ff_asf_guid guid;
54} AVCodecGuid;
55
56static enum CodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid)
57{
58 int i;
59 for (i = 0; guids[i].id != CODEC_ID_NONE; i++) {
60 if (!ff_guidcmp(guids[i].guid, guid))
61 return guids[i].id;
62 }
63 return CODEC_ID_NONE;
64}
65
66/* WTV GUIDs */
67static const ff_asf_guid wtv_guid =
68 {0xB7,0xD8,0x00,0x20,0x37,0x49,0xDA,0x11,0xA6,0x4E,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
69static const ff_asf_guid meta_guid =
70 {0x5A,0xFE,0xD7,0x6D,0xC8,0x1D,0x8F,0x4A,0x99,0x22,0xFA,0xB1,0x1C,0x38,0x14,0x53};
71static const ff_asf_guid timestamp_guid =
72 {0x5B,0x05,0xE6,0x1B,0x97,0xA9,0x49,0x43,0x88,0x17,0x1A,0x65,0x5A,0x29,0x8A,0x97};
73static const ff_asf_guid data_guid =
74 {0x95,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
75static const ff_asf_guid stream_guid =
76 {0xED,0xA4,0x13,0x23,0x2D,0xBF,0x4F,0x45,0xAD,0x8A,0xD9,0x5B,0xA7,0xF9,0x1F,0xEE};
77static const ff_asf_guid subtitle_guid =
78 {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
79static const ff_asf_guid language_guid =
80 {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95};
81
82/* Windows media GUIDs */
83
84#define MEDIASUBTYPE_BASE_GUID \
85 0x00,0x00,0x10,0x00,0x80,0x00,0x00,0xAA,0x00,0x38,0x9B,0x71
86
87/* Media types */
88static const ff_asf_guid mediatype_audio =
89 {'a','u','d','s',MEDIASUBTYPE_BASE_GUID};
90static const ff_asf_guid mediatype_video =
91 {'v','i','d','s',MEDIASUBTYPE_BASE_GUID};
92static const ff_asf_guid mediasubtype_mpeg1payload =
93 {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
94static const ff_asf_guid mediatype_mpeg2_sections =
95 {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
96static const ff_asf_guid mediatype_mpeg2_pes =
97 {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
98static const ff_asf_guid mediatype_mstvcaption =
99 {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
100
101/* Media subtypes */
102static const ff_asf_guid mediasubtype_cpfilters_processed =
103 {0x28,0xBD,0xAD,0x46,0xD0,0x6F,0x96,0x47,0x93,0xB2,0x15,0x5C,0x51,0xDC,0x04,0x8D};
104static const ff_asf_guid mediasubtype_dvb_subtitle =
105 {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
106static const ff_asf_guid mediasubtype_teletext =
107 {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
108static const ff_asf_guid mediasubtype_dtvccdata =
109 {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
110static const ff_asf_guid mediasubtype_mpeg2_sections =
111 {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
112
113/* Formats */
114static const ff_asf_guid format_cpfilters_processed =
115 {0x6F,0xB3,0x39,0x67,0x5F,0x1D,0xC2,0x4A,0x81,0x92,0x28,0xBB,0x0E,0x73,0xD1,0x6A};
116static const ff_asf_guid format_waveformatex =
117 {0x81,0x9F,0x58,0x05,0x56,0xC3,0xCE,0x11,0xBF,0x01,0x00,0xAA,0x00,0x55,0x59,0x5A};
118static const ff_asf_guid format_videoinfo2 =
119 {0xA0,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
120static const ff_asf_guid format_mpeg2_video =
121 {0xE3,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
122static const ff_asf_guid format_none =
123 {0xD6,0x17,0x64,0x0F,0x18,0xC3,0xD0,0x11,0xA4,0x3F,0x00,0xA0,0xC9,0x22,0x31,0x96};
124
125static const AVCodecGuid video_guids[] = {
126 {CODEC_ID_MPEG2VIDEO, {0x26,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
127 {CODEC_ID_NONE}
128};
129
130static const AVCodecGuid audio_guids[] = {
131 {CODEC_ID_AC3, {0x2C,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
132 {CODEC_ID_EAC3, {0xAF,0x87,0xFB,0xA7,0x02,0x2D,0xFB,0x42,0xA4,0xD4,0x05,0xCD,0x93,0x84,0x3B,0xDD}},
133 {CODEC_ID_MP2, {0x2B,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
134 {CODEC_ID_NONE}
135};
136
137static int read_probe(AVProbeData *p)
138{
139 return ff_guidcmp(p->buf, wtv_guid) ? 0 : AVPROBE_SCORE_MAX;
140}
141
142/**
143 * parse VIDEOINFOHEADER2 structure
144 * @return bytes consumed
145 */
146static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
147{
148 ByteIOContext *pb = s->pb;
149
150 url_fskip(pb, 32);
151 st->codec->bit_rate = get_le32(pb);
152 url_fskip(pb, 20);
153 st->sample_aspect_ratio.num = get_le32(pb);
154 st->sample_aspect_ratio.den = get_le32(pb);
155 url_fskip(pb, 8);
156 ff_get_bmp_header(pb, st);
157
158 return 72 + 40;
159}
160
161/**
162 * Parse MPEG1WAVEFORMATEX extradata structure
163 */
164static void parse_mpeg1waveformatex(AVStream *st)
165{
166 /* fwHeadLayer */
167 switch (AV_RL16(st->codec->extradata)) {
168 case 0x0001 : st->codec->codec_id = CODEC_ID_MP1; break;
169 case 0x0002 : st->codec->codec_id = CODEC_ID_MP2; break;
170 case 0x0004 : st->codec->codec_id = CODEC_ID_MP3; break;
171 }
172
173 st->codec->bit_rate = AV_RL32(st->codec->extradata + 2); /* dwHeadBitrate */
174
175 /* dwHeadMode */
176 switch (AV_RL16(st->codec->extradata + 6)) {
177 case 1 : case 2 : case 4 : st->codec->channels = 2; break;
178 case 8 : st->codec->channels = 1; break;
179 }
180}
181
182static AVStream * new_stream(AVFormatContext *s, int sid, int codec_type)
183{
184 AVStream * st = av_new_stream(s, sid);
185 if (!st)
186 return NULL;
187 st->codec->codec_type = codec_type;
188 st->need_parsing = AVSTREAM_PARSE_FULL;
189 av_set_pts_info(st, 64, 1, 10000000);
190 return st;
191}
192
193/**
194 * parse Media Type structure and create new streams as required
195 * @param mediatype Mediatype GUID
196 * @param subtype Subtype GUID
197 * @param formattype Format GUID
198 * @param size Size of format buffer
199 * @return NULL on error
200 */
201static AVStream * parse_media_type(AVFormatContext *s, int sid,
202 ff_asf_guid mediatype, ff_asf_guid subtype,
203 ff_asf_guid formattype, int size)
204{
205 ByteIOContext *pb = s->pb;
206 AVStream *st;
207 if (!ff_guidcmp(subtype, mediasubtype_cpfilters_processed) &&
208 !ff_guidcmp(formattype, format_cpfilters_processed)) {
209 ff_asf_guid actual_subtype;
210 ff_asf_guid actual_formattype;
211
212 if (size < 32) {
213 av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
214 url_fskip(pb, size);
215 return NULL;
216 }
217
218 url_fskip(pb, size - 32);
219 ff_get_guid(pb, &actual_subtype);
220 ff_get_guid(pb, &actual_formattype);
221 url_fseek(pb, -size, SEEK_CUR);
222
223 st = parse_media_type(s, sid, mediatype, actual_subtype, actual_formattype, size - 32);
224 url_fskip(pb, 32);
225 return st;
226 } else if (!ff_guidcmp(mediatype, mediatype_audio)) {
227 st = new_stream(s, sid, AVMEDIA_TYPE_AUDIO);
228 if (!st)
229 return NULL;
230 if (!ff_guidcmp(formattype, format_waveformatex)) {
231 ff_get_wav_header(pb, st->codec, size);
232 } else {
233 if (ff_guidcmp(formattype, format_none))
234 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
235 url_fskip(pb, size);
236 }
237
238 if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) {
239 st->codec->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codec->bits_per_coded_sample);
240 } else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
241 if (st->codec->extradata && st->codec->extradata_size >= 22)
242 parse_mpeg1waveformatex(st);
243 else
244 av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
245 } else {
246 st->codec->codec_id = ff_codec_guid_get_id(audio_guids, subtype);
247 }
248 if (st->codec->codec_id == CODEC_ID_NONE)
249 av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype));
250 return st;
251 } else if (!ff_guidcmp(mediatype, mediatype_video)) {
252 st = new_stream(s, sid, AVMEDIA_TYPE_VIDEO);
253 if (!st)
254 return NULL;
255 if (!ff_guidcmp(formattype, format_videoinfo2)) {
256 int consumed = parse_videoinfoheader2(s, st);
257 url_fskip(pb, FFMAX(size - consumed, 0));
258 } else if (!ff_guidcmp(formattype, format_mpeg2_video)) {
259 int consumed = parse_videoinfoheader2(s, st);
260 url_fskip(pb, FFMAX(size - consumed, 0));
261 } else {
262 if (ff_guidcmp(formattype, format_none))
263 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
264 url_fskip(pb, size);
265 }
266
267 if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) {
268 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype));
269 } else {
270 st->codec->codec_id = ff_codec_guid_get_id(video_guids, subtype);
271 }
272 if (st->codec->codec_id == CODEC_ID_NONE)
273 av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype));
274 return st;
275 } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
276 !ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) {
277 st = new_stream(s, sid, AVMEDIA_TYPE_SUBTITLE);
278 if (!st)
279 return NULL;
280 if (ff_guidcmp(formattype, format_none))
281 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
282 url_fskip(pb, size);
283 st->codec->codec_id = CODEC_ID_DVB_SUBTITLE;
284 return st;
285 } else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
286 (!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) {
287 st = new_stream(s, sid, AVMEDIA_TYPE_SUBTITLE);
288 if (!st)
289 return NULL;
290 if (ff_guidcmp(formattype, format_none))
291 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
292 url_fskip(pb, size);
293 st->codec->codec_id = CODEC_ID_DVB_TELETEXT;
294 return st;
295 } else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
296 !ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) {
297 if (ff_guidcmp(formattype, format_none))
298 av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype));
299 url_fskip(pb, size);
300 return NULL;
301 }
302
303 av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"PRI_GUID
304 ", subtype:"PRI_GUID", formattype:"PRI_GUID"\n",
305 ARG_GUID(mediatype), ARG_GUID(subtype), ARG_GUID(formattype));
306 url_fskip(pb, size);
307 return NULL;
308}
309
310/**
311 * Read three byte language code
312 */
313static void get_language(ByteIOContext *pb, AVStream *st)
314{
315 uint8_t language[4];
316 get_buffer(pb, language, 3);
317 if (language[0]) {
318 language[3] = 0;
319 av_metadata_set2(&st->metadata, "language", language, 0);
320 }
321}
322
323enum {
324 SEEK_TO_DATA = 0,
325 SEEK_TO_BYTE,
326 SEEK_TO_PTS,
327};
328
329/**
330 * Parse WTV chunks
331 * @param mode SEEK_TO_DATA, SEEK_TO_BYTE, SEEK_TO_PTS
332 * @param seekts either byte position or timestamp
333 * @param[out] len Length of data chunk
334 * @return stream index of data chunk, or <0 on error
335 */
336static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
337{
338 WtvContext *wtv = s->priv_data;
339 ByteIOContext *pb = s->pb;
340 while (!url_feof(pb)) {
341 ff_asf_guid g;
342 int len, sid, consumed;
343
344 if (mode == SEEK_TO_BYTE && url_ftell(pb) >= seekts)
345 return 0;
346
347 ff_get_guid(pb, &g);
348 if (is_zero(g, sizeof(ff_asf_guid)))
349 return AVERROR_EOF;
350
351 len = get_le32(pb);
352 sid = get_le32(pb) & 0x7FFF;
353 url_fskip(pb, 8);
354 consumed = 32;
355
356 if (!ff_guidcmp(g, stream_guid)) {
357 if (ff_find_stream_index(s, sid) < 0) {
358 ff_asf_guid mediatype, subtype, formattype;
359 int size;
360 consumed += 20;
361 url_fskip(pb, 16);
362 if (get_le32(pb)) {
363 url_fskip(pb, 8);
364 ff_get_guid(pb, &mediatype);
365 ff_get_guid(pb, &subtype);
366 url_fskip(pb, 12);
367 ff_get_guid(pb, &formattype);
368 size = get_le32(pb);
369 parse_media_type(s, sid, mediatype, subtype, formattype, size);
370 consumed += 72 + size;
371 }
372 }
373 } else if (!ff_guidcmp(g, subtitle_guid)) {
374 int stream_index = ff_find_stream_index(s, sid);
375 if (stream_index >= 0) {
376 AVStream *st = s->streams[stream_index];
377
378 url_fskip(pb, 10);
379 get_language(pb, st);
380 url_fskip(pb, 1);
381
382 st->codec->extradata = av_malloc(4);
383 if (!st->codec->extradata)
384 return AVERROR(ENOMEM);
385 st->codec->extradata_size = get_buffer(pb, st->codec->extradata, 4);
386 consumed += 18;
387 }
388 } else if (!ff_guidcmp(g, language_guid)) {
389 int stream_index = ff_find_stream_index(s, sid);
390 if (stream_index >= 0) {
391 AVStream *st = s->streams[stream_index];
392 url_fskip(pb, 12);
393 get_language(pb, st);
394 consumed += 15;
395 }
396 } else if (!ff_guidcmp(g, timestamp_guid)) {
397 url_fskip(pb, 8);
398 wtv->pts = get_le64(pb);
399 consumed += 16;
400 if (wtv->pts == -1)
401 wtv->pts = AV_NOPTS_VALUE;
402 if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
403#define WTV_PAD8(x) (((x) + 7) & ~7)
404 url_fskip(pb, WTV_PAD8(len) - consumed);
405 return 0;
406 }
407 } else if (!ff_guidcmp(g, data_guid)) {
408 int stream_index = ff_find_stream_index(s, sid);
409 if (mode == SEEK_TO_DATA && stream_index >= 0) {
410 if (len_ptr) {
411 *len_ptr = len;
412 }
413 if (wtv->pts != AV_NOPTS_VALUE)
414 av_add_index_entry(s->streams[stream_index], url_ftell(pb) - consumed, wtv->pts, 0, 0, AVINDEX_KEYFRAME);
415 return stream_index;
416 }
417 } else if (
418 !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}) ||
419 !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}) ||
420 !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}) ||
421 !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}) ||
422 !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}) ||
423 !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}) ||
424 !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}) ||
425 !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}) ||
426 !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}) ||
427 !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}) ||
428 !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}) ||
429 !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}) ||
430 !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}) ||
431 !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}) ||
432 !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}) ||
433 !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}) ||
434 !ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
435 !ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
436 !ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
437 !ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
438 !ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
439 !ff_guidcmp(g, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
440 !ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
441 !ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
442 !ff_guidcmp(g, (const ff_asf_guid){0xA2,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) {
443 //ignore known guids
444 } else
445 av_log(s, AV_LOG_WARNING, "unsuported chunk:"PRI_GUID"\n", ARG_GUID(g));
446
447 url_fskip(pb, WTV_PAD8(len) - consumed);
448 }
449 return AVERROR_EOF;
450}
451
452#define WTV_CHUNK_START 0x40000
453
454static int read_header(AVFormatContext *s, AVFormatParameters *ap)
455{
456 ByteIOContext *pb = s->pb;
457 int ret;
458
459 url_fseek(pb, WTV_CHUNK_START, SEEK_SET);
460 ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
461 if (ret < 0)
462 return ret;
463
464 url_fseek(pb, -32, SEEK_CUR);
465 return 0;
466}
467
468static int read_packet(AVFormatContext *s, AVPacket *pkt)
469{
470 WtvContext *wtv = s->priv_data;
471 ByteIOContext *pb = s->pb;
472 int stream_index, len, ret;
473
474 stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
475 if (stream_index < 0)
476 return stream_index;
477
478 ret = av_get_packet(pb, pkt, len - 32);
479 if (ret < 0)
480 return ret;
481 pkt->stream_index = stream_index;
482 pkt->pts = wtv->pts;
483 url_fskip(pb, WTV_PAD8(len) - len);
484 return 0;
485}
486
487static int read_seek2(AVFormatContext *s, int stream_index,
488 int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
489{
490 WtvContext *wtv = s->priv_data;
491 ByteIOContext *pb = s->pb;
492 AVStream *st;
493 int i;
494
495 if (stream_index < 0) {
496 stream_index = av_find_default_stream_index(s);
497 if (stream_index < 0)
498 return -1;
499 }
500 st = s->streams[stream_index];
501
502 if ((flags & AVSEEK_FLAG_FRAME)) {
503 return AVERROR_NOTSUPP;
504 } else if ((flags & AVSEEK_FLAG_BYTE)) {
505 if (ts < url_ftell(pb)) {
506 for (i = st->nb_index_entries - 1; i >= 0; i--) {
507 if (st->index_entries[i].pos <= ts) {
508 wtv->pts = st->index_entries[i].timestamp;
509 url_fseek(pb, st->index_entries[i].pos, SEEK_SET);
510 break;
511 }
512 }
513 if (i < 0) {
514 wtv->pts = 0;
515 url_fseek(pb, WTV_CHUNK_START, SEEK_SET);
516 }
517 }
518 if (parse_chunks(s, SEEK_TO_BYTE, ts, 0) < 0)
519 return AVERROR(ERANGE);
520 return 0;
521 } else {
522 ts *= 10;
523 i = av_index_search_timestamp(st, ts, flags);
524 if (i < 0) {
525 if (st->nb_index_entries > 0) {
526 wtv->pts = st->index_entries[st->nb_index_entries - 1].timestamp;
527 url_fseek(pb, st->index_entries[st->nb_index_entries - 1].pos, SEEK_SET);
528 } else {
529 wtv->pts = 0;
530 url_fseek(pb, WTV_CHUNK_START, SEEK_SET);
531 }
532 if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
533 return AVERROR(ERANGE);
534 return 0;
535 }
536 wtv->pts = st->index_entries[i].timestamp;
537 url_fseek(pb, st->index_entries[i].pos, SEEK_SET);
538 return 0;
539 }
540}
541
542AVInputFormat wtv_demuxer = {
543 .name = "wtv",
544 .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
545 .priv_data_size = sizeof(WtvContext),
546 .read_probe = read_probe,
547 .read_header = read_header,
548 .read_packet = read_packet,
549 .read_seek2 = read_seek2,
550 .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
551};