Commit | Line | Data |
---|---|---|
2ba45a60 DM |
1 | /* |
2 | * Microsoft XMV demuxer | |
3 | * Copyright (c) 2011 Sven Hesse <drmccoy@drmccoy.de> | |
4 | * Copyright (c) 2011 Matthew Hoops <clone2727@gmail.com> | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | /** | |
24 | * @file | |
25 | * Microsoft XMV demuxer | |
26 | */ | |
27 | ||
28 | #include <inttypes.h> | |
29 | ||
30 | #include "libavutil/intreadwrite.h" | |
31 | ||
32 | #include "avformat.h" | |
33 | #include "internal.h" | |
34 | #include "riff.h" | |
35 | #include "libavutil/avassert.h" | |
36 | ||
37 | /** The min size of an XMV header. */ | |
38 | #define XMV_MIN_HEADER_SIZE 36 | |
39 | ||
40 | /** Audio flag: ADPCM'd 5.1 stream, front left / right channels */ | |
41 | #define XMV_AUDIO_ADPCM51_FRONTLEFTRIGHT 1 | |
42 | /** Audio flag: ADPCM'd 5.1 stream, front center / low frequency channels */ | |
43 | #define XMV_AUDIO_ADPCM51_FRONTCENTERLOW 2 | |
44 | /** Audio flag: ADPCM'd 5.1 stream, rear left / right channels */ | |
45 | #define XMV_AUDIO_ADPCM51_REARLEFTRIGHT 4 | |
46 | ||
47 | /** Audio flag: Any of the ADPCM'd 5.1 stream flags. */ | |
48 | #define XMV_AUDIO_ADPCM51 (XMV_AUDIO_ADPCM51_FRONTLEFTRIGHT | \ | |
49 | XMV_AUDIO_ADPCM51_FRONTCENTERLOW | \ | |
50 | XMV_AUDIO_ADPCM51_REARLEFTRIGHT) | |
51 | ||
52 | #define XMV_BLOCK_ALIGN_SIZE 36 | |
53 | ||
54 | /** A video packet with an XMV file. */ | |
55 | typedef struct XMVVideoPacket { | |
56 | int stream_index; ///< The decoder stream index for this video packet. | |
57 | ||
58 | uint32_t data_size; ///< The size of the remaining video data. | |
59 | uint64_t data_offset; ///< The offset of the video data within the file. | |
60 | ||
61 | uint32_t current_frame; ///< The current frame within this video packet. | |
62 | uint32_t frame_count; ///< The amount of frames within this video packet. | |
63 | ||
64 | int has_extradata; ///< Does the video packet contain extra data? | |
65 | uint8_t extradata[4]; ///< The extra data | |
66 | ||
67 | int64_t last_pts; ///< PTS of the last video frame. | |
68 | int64_t pts; ///< PTS of the most current video frame. | |
69 | } XMVVideoPacket; | |
70 | ||
71 | /** An audio packet with an XMV file. */ | |
72 | typedef struct XMVAudioPacket { | |
73 | int stream_index; ///< The decoder stream index for this audio packet. | |
74 | ||
75 | /* Stream format properties. */ | |
76 | uint16_t compression; ///< The type of compression. | |
77 | uint16_t channels; ///< Number of channels. | |
78 | uint32_t sample_rate; ///< Sampling rate. | |
79 | uint16_t bits_per_sample; ///< Bits per compressed sample. | |
80 | uint32_t bit_rate; ///< Bits of compressed data per second. | |
81 | uint16_t flags; ///< Flags | |
82 | unsigned block_align; ///< Bytes per compressed block. | |
83 | uint16_t block_samples; ///< Decompressed samples per compressed block. | |
84 | ||
85 | enum AVCodecID codec_id; ///< The codec ID of the compression scheme. | |
86 | ||
87 | uint32_t data_size; ///< The size of the remaining audio data. | |
88 | uint64_t data_offset; ///< The offset of the audio data within the file. | |
89 | ||
90 | uint32_t frame_size; ///< Number of bytes to put into an audio frame. | |
91 | ||
92 | uint64_t block_count; ///< Running counter of decompressed audio block. | |
93 | } XMVAudioPacket; | |
94 | ||
95 | /** Context for demuxing an XMV file. */ | |
96 | typedef struct XMVDemuxContext { | |
97 | uint16_t audio_track_count; ///< Number of audio track in this file. | |
98 | ||
99 | uint32_t this_packet_size; ///< Size of the current packet. | |
100 | uint32_t next_packet_size; ///< Size of the next packet. | |
101 | ||
102 | uint64_t this_packet_offset; ///< Offset of the current packet. | |
103 | uint64_t next_packet_offset; ///< Offset of the next packet. | |
104 | ||
105 | uint16_t current_stream; ///< The index of the stream currently handling. | |
106 | uint16_t stream_count; ///< The number of streams in this file. | |
107 | ||
108 | XMVVideoPacket video; ///< The video packet contained in each packet. | |
109 | XMVAudioPacket *audio; ///< The audio packets contained in each packet. | |
110 | } XMVDemuxContext; | |
111 | ||
112 | static int xmv_probe(AVProbeData *p) | |
113 | { | |
114 | uint32_t file_version; | |
115 | ||
116 | if (p->buf_size < XMV_MIN_HEADER_SIZE) | |
117 | return 0; | |
118 | ||
119 | file_version = AV_RL32(p->buf + 16); | |
120 | if ((file_version == 0) || (file_version > 4)) | |
121 | return 0; | |
122 | ||
123 | if (!memcmp(p->buf + 12, "xobX", 4)) | |
124 | return AVPROBE_SCORE_MAX; | |
125 | ||
126 | return 0; | |
127 | } | |
128 | ||
129 | static int xmv_read_close(AVFormatContext *s) | |
130 | { | |
131 | XMVDemuxContext *xmv = s->priv_data; | |
132 | ||
133 | av_freep(&xmv->audio); | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
138 | static int xmv_read_header(AVFormatContext *s) | |
139 | { | |
140 | XMVDemuxContext *xmv = s->priv_data; | |
141 | AVIOContext *pb = s->pb; | |
142 | AVStream *vst = NULL; | |
143 | ||
144 | uint32_t file_version; | |
145 | uint32_t this_packet_size; | |
146 | uint16_t audio_track; | |
147 | int ret; | |
148 | ||
149 | avio_skip(pb, 4); /* Next packet size */ | |
150 | ||
151 | this_packet_size = avio_rl32(pb); | |
152 | ||
153 | avio_skip(pb, 4); /* Max packet size */ | |
154 | avio_skip(pb, 4); /* "xobX" */ | |
155 | ||
156 | file_version = avio_rl32(pb); | |
157 | if ((file_version != 4) && (file_version != 2)) | |
158 | avpriv_request_sample(s, "Uncommon version %"PRIu32"", file_version); | |
159 | ||
160 | ||
161 | /* Video track */ | |
162 | ||
163 | vst = avformat_new_stream(s, NULL); | |
164 | if (!vst) | |
165 | return AVERROR(ENOMEM); | |
166 | ||
167 | avpriv_set_pts_info(vst, 32, 1, 1000); | |
168 | ||
169 | vst->codec->codec_type = AVMEDIA_TYPE_VIDEO; | |
170 | vst->codec->codec_id = AV_CODEC_ID_WMV2; | |
171 | vst->codec->codec_tag = MKBETAG('W', 'M', 'V', '2'); | |
172 | vst->codec->width = avio_rl32(pb); | |
173 | vst->codec->height = avio_rl32(pb); | |
174 | ||
175 | vst->duration = avio_rl32(pb); | |
176 | ||
177 | xmv->video.stream_index = vst->index; | |
178 | ||
179 | /* Audio tracks */ | |
180 | ||
181 | xmv->audio_track_count = avio_rl16(pb); | |
182 | ||
183 | avio_skip(pb, 2); /* Unknown (padding?) */ | |
184 | ||
185 | xmv->audio = av_malloc_array(xmv->audio_track_count, sizeof(XMVAudioPacket)); | |
186 | if (!xmv->audio) { | |
187 | ret = AVERROR(ENOMEM); | |
188 | goto fail; | |
189 | } | |
190 | ||
191 | for (audio_track = 0; audio_track < xmv->audio_track_count; audio_track++) { | |
192 | XMVAudioPacket *packet = &xmv->audio[audio_track]; | |
193 | AVStream *ast = NULL; | |
194 | ||
195 | packet->compression = avio_rl16(pb); | |
196 | packet->channels = avio_rl16(pb); | |
197 | packet->sample_rate = avio_rl32(pb); | |
198 | packet->bits_per_sample = avio_rl16(pb); | |
199 | packet->flags = avio_rl16(pb); | |
200 | ||
201 | packet->bit_rate = packet->bits_per_sample * | |
202 | packet->sample_rate * | |
203 | packet->channels; | |
204 | packet->block_align = XMV_BLOCK_ALIGN_SIZE * packet->channels; | |
205 | packet->block_samples = 64; | |
206 | packet->codec_id = ff_wav_codec_get_id(packet->compression, | |
207 | packet->bits_per_sample); | |
208 | ||
209 | packet->stream_index = -1; | |
210 | ||
211 | packet->frame_size = 0; | |
212 | packet->block_count = 0; | |
213 | ||
214 | /* TODO: ADPCM'd 5.1 sound is encoded in three separate streams. | |
215 | * Those need to be interleaved to a proper 5.1 stream. */ | |
216 | if (packet->flags & XMV_AUDIO_ADPCM51) | |
217 | av_log(s, AV_LOG_WARNING, "Unsupported 5.1 ADPCM audio stream " | |
218 | "(0x%04X)\n", packet->flags); | |
219 | ||
220 | if (!packet->channels || !packet->sample_rate || | |
221 | packet->channels >= UINT16_MAX / XMV_BLOCK_ALIGN_SIZE) { | |
222 | av_log(s, AV_LOG_ERROR, "Invalid parameters for audio track %"PRIu16".\n", | |
223 | audio_track); | |
224 | ret = AVERROR_INVALIDDATA; | |
225 | goto fail; | |
226 | } | |
227 | ||
228 | ast = avformat_new_stream(s, NULL); | |
229 | if (!ast) { | |
230 | ret = AVERROR(ENOMEM); | |
231 | goto fail; | |
232 | } | |
233 | ||
234 | ast->codec->codec_type = AVMEDIA_TYPE_AUDIO; | |
235 | ast->codec->codec_id = packet->codec_id; | |
236 | ast->codec->codec_tag = packet->compression; | |
237 | ast->codec->channels = packet->channels; | |
238 | ast->codec->sample_rate = packet->sample_rate; | |
239 | ast->codec->bits_per_coded_sample = packet->bits_per_sample; | |
240 | ast->codec->bit_rate = packet->bit_rate; | |
241 | ast->codec->block_align = 36 * packet->channels; | |
242 | ||
243 | avpriv_set_pts_info(ast, 32, packet->block_samples, packet->sample_rate); | |
244 | ||
245 | packet->stream_index = ast->index; | |
246 | ||
247 | ast->duration = vst->duration; | |
248 | } | |
249 | ||
250 | ||
251 | /* Initialize the packet context */ | |
252 | ||
253 | xmv->next_packet_offset = avio_tell(pb); | |
254 | xmv->next_packet_size = this_packet_size - xmv->next_packet_offset; | |
255 | xmv->stream_count = xmv->audio_track_count + 1; | |
256 | ||
257 | return 0; | |
258 | ||
259 | fail: | |
260 | xmv_read_close(s); | |
261 | return ret; | |
262 | } | |
263 | ||
264 | static void xmv_read_extradata(uint8_t *extradata, AVIOContext *pb) | |
265 | { | |
266 | /* Read the XMV extradata */ | |
267 | ||
268 | uint32_t data = avio_rl32(pb); | |
269 | ||
270 | int mspel_bit = !!(data & 0x01); | |
271 | int loop_filter = !!(data & 0x02); | |
272 | int abt_flag = !!(data & 0x04); | |
273 | int j_type_bit = !!(data & 0x08); | |
274 | int top_left_mv_flag = !!(data & 0x10); | |
275 | int per_mb_rl_bit = !!(data & 0x20); | |
276 | int slice_count = (data >> 6) & 7; | |
277 | ||
278 | /* Write it back as standard WMV2 extradata */ | |
279 | ||
280 | data = 0; | |
281 | ||
282 | data |= mspel_bit << 15; | |
283 | data |= loop_filter << 14; | |
284 | data |= abt_flag << 13; | |
285 | data |= j_type_bit << 12; | |
286 | data |= top_left_mv_flag << 11; | |
287 | data |= per_mb_rl_bit << 10; | |
288 | data |= slice_count << 7; | |
289 | ||
290 | AV_WB32(extradata, data); | |
291 | } | |
292 | ||
293 | static int xmv_process_packet_header(AVFormatContext *s) | |
294 | { | |
295 | XMVDemuxContext *xmv = s->priv_data; | |
296 | AVIOContext *pb = s->pb; | |
297 | ||
298 | uint8_t data[8]; | |
299 | uint16_t audio_track; | |
300 | uint64_t data_offset; | |
301 | ||
302 | /* Next packet size */ | |
303 | xmv->next_packet_size = avio_rl32(pb); | |
304 | ||
305 | /* Packet video header */ | |
306 | ||
307 | if (avio_read(pb, data, 8) != 8) | |
308 | return AVERROR(EIO); | |
309 | ||
310 | xmv->video.data_size = AV_RL32(data) & 0x007FFFFF; | |
311 | ||
312 | xmv->video.current_frame = 0; | |
313 | xmv->video.frame_count = (AV_RL32(data) >> 23) & 0xFF; | |
314 | ||
315 | xmv->video.has_extradata = (data[3] & 0x80) != 0; | |
316 | ||
317 | /* Adding the audio data sizes and the video data size keeps you 4 bytes | |
318 | * short for every audio track. But as playing around with XMV files with | |
319 | * ADPCM audio showed, taking the extra 4 bytes from the audio data gives | |
320 | * you either completely distorted audio or click (when skipping the | |
321 | * remaining 68 bytes of the ADPCM block). Subtracting 4 bytes for every | |
322 | * audio track from the video data works at least for the audio. Probably | |
323 | * some alignment thing? | |
324 | * The video data has (always?) lots of padding, so it should work out... | |
325 | */ | |
326 | xmv->video.data_size -= xmv->audio_track_count * 4; | |
327 | ||
328 | xmv->current_stream = 0; | |
329 | if (!xmv->video.frame_count) { | |
330 | xmv->video.frame_count = 1; | |
331 | xmv->current_stream = xmv->stream_count > 1; | |
332 | } | |
333 | ||
334 | /* Packet audio header */ | |
335 | ||
336 | for (audio_track = 0; audio_track < xmv->audio_track_count; audio_track++) { | |
337 | XMVAudioPacket *packet = &xmv->audio[audio_track]; | |
338 | ||
339 | if (avio_read(pb, data, 4) != 4) | |
340 | return AVERROR(EIO); | |
341 | ||
342 | packet->data_size = AV_RL32(data) & 0x007FFFFF; | |
343 | if ((packet->data_size == 0) && (audio_track != 0)) | |
344 | /* This happens when I create an XMV with several identical audio | |
345 | * streams. From the size calculations, duplicating the previous | |
346 | * stream's size works out, but the track data itself is silent. | |
347 | * Maybe this should also redirect the offset to the previous track? | |
348 | */ | |
349 | packet->data_size = xmv->audio[audio_track - 1].data_size; | |
350 | ||
351 | /* Carve up the audio data in frame_count slices */ | |
352 | packet->frame_size = packet->data_size / xmv->video.frame_count; | |
353 | packet->frame_size -= packet->frame_size % packet->block_align; | |
354 | } | |
355 | ||
356 | /* Packet data offsets */ | |
357 | ||
358 | data_offset = avio_tell(pb); | |
359 | ||
360 | xmv->video.data_offset = data_offset; | |
361 | data_offset += xmv->video.data_size; | |
362 | ||
363 | for (audio_track = 0; audio_track < xmv->audio_track_count; audio_track++) { | |
364 | xmv->audio[audio_track].data_offset = data_offset; | |
365 | data_offset += xmv->audio[audio_track].data_size; | |
366 | } | |
367 | ||
368 | /* Video frames header */ | |
369 | ||
370 | /* Read new video extra data */ | |
371 | if (xmv->video.data_size > 0) { | |
372 | if (xmv->video.has_extradata) { | |
373 | xmv_read_extradata(xmv->video.extradata, pb); | |
374 | ||
375 | xmv->video.data_size -= 4; | |
376 | xmv->video.data_offset += 4; | |
377 | ||
378 | if (xmv->video.stream_index >= 0) { | |
379 | AVStream *vst = s->streams[xmv->video.stream_index]; | |
380 | ||
381 | av_assert0(xmv->video.stream_index < s->nb_streams); | |
382 | ||
383 | if (vst->codec->extradata_size < 4) { | |
384 | av_free(vst->codec->extradata); | |
385 | ||
386 | ff_alloc_extradata(vst->codec, 4); | |
387 | } | |
388 | ||
389 | memcpy(vst->codec->extradata, xmv->video.extradata, 4); | |
390 | } | |
391 | } | |
392 | } | |
393 | ||
394 | return 0; | |
395 | } | |
396 | ||
397 | static int xmv_fetch_new_packet(AVFormatContext *s) | |
398 | { | |
399 | XMVDemuxContext *xmv = s->priv_data; | |
400 | AVIOContext *pb = s->pb; | |
401 | int result; | |
402 | ||
403 | if (xmv->this_packet_offset == xmv->next_packet_offset) | |
404 | return AVERROR_EOF; | |
405 | ||
406 | /* Seek to it */ | |
407 | xmv->this_packet_offset = xmv->next_packet_offset; | |
408 | if (avio_seek(pb, xmv->this_packet_offset, SEEK_SET) != xmv->this_packet_offset) | |
409 | return AVERROR(EIO); | |
410 | ||
411 | /* Update the size */ | |
412 | xmv->this_packet_size = xmv->next_packet_size; | |
413 | if (xmv->this_packet_size < (12 + xmv->audio_track_count * 4)) | |
414 | return AVERROR(EIO); | |
415 | ||
416 | /* Process the header */ | |
417 | result = xmv_process_packet_header(s); | |
418 | if (result) | |
419 | return result; | |
420 | ||
421 | /* Update the offset */ | |
422 | xmv->next_packet_offset = xmv->this_packet_offset + xmv->this_packet_size; | |
423 | ||
424 | return 0; | |
425 | } | |
426 | ||
427 | static int xmv_fetch_audio_packet(AVFormatContext *s, | |
428 | AVPacket *pkt, uint32_t stream) | |
429 | { | |
430 | XMVDemuxContext *xmv = s->priv_data; | |
431 | AVIOContext *pb = s->pb; | |
432 | XMVAudioPacket *audio = &xmv->audio[stream]; | |
433 | ||
434 | uint32_t data_size; | |
435 | uint32_t block_count; | |
436 | int result; | |
437 | ||
438 | /* Seek to it */ | |
439 | if (avio_seek(pb, audio->data_offset, SEEK_SET) != audio->data_offset) | |
440 | return AVERROR(EIO); | |
441 | ||
442 | if ((xmv->video.current_frame + 1) < xmv->video.frame_count) | |
443 | /* Not the last frame, get at most frame_size bytes. */ | |
444 | data_size = FFMIN(audio->frame_size, audio->data_size); | |
445 | else | |
446 | /* Last frame, get the rest. */ | |
447 | data_size = audio->data_size; | |
448 | ||
449 | /* Read the packet */ | |
450 | result = av_get_packet(pb, pkt, data_size); | |
451 | if (result <= 0) | |
452 | return result; | |
453 | ||
454 | pkt->stream_index = audio->stream_index; | |
455 | ||
456 | /* Calculate the PTS */ | |
457 | ||
458 | block_count = data_size / audio->block_align; | |
459 | ||
460 | pkt->duration = block_count; | |
461 | pkt->pts = audio->block_count; | |
462 | pkt->dts = AV_NOPTS_VALUE; | |
463 | ||
464 | audio->block_count += block_count; | |
465 | ||
466 | /* Advance offset */ | |
467 | audio->data_size -= data_size; | |
468 | audio->data_offset += data_size; | |
469 | ||
470 | return 0; | |
471 | } | |
472 | ||
473 | static int xmv_fetch_video_packet(AVFormatContext *s, | |
474 | AVPacket *pkt) | |
475 | { | |
476 | XMVDemuxContext *xmv = s->priv_data; | |
477 | AVIOContext *pb = s->pb; | |
478 | XMVVideoPacket *video = &xmv->video; | |
479 | ||
480 | int result; | |
481 | uint32_t frame_header; | |
482 | uint32_t frame_size, frame_timestamp; | |
483 | uint8_t *data, *end; | |
484 | ||
485 | /* Seek to it */ | |
486 | if (avio_seek(pb, video->data_offset, SEEK_SET) != video->data_offset) | |
487 | return AVERROR(EIO); | |
488 | ||
489 | /* Read the frame header */ | |
490 | frame_header = avio_rl32(pb); | |
491 | ||
492 | frame_size = (frame_header & 0x1FFFF) * 4 + 4; | |
493 | frame_timestamp = (frame_header >> 17); | |
494 | ||
495 | if ((frame_size + 4) > video->data_size) | |
496 | return AVERROR(EIO); | |
497 | ||
498 | /* Get the packet data */ | |
499 | result = av_get_packet(pb, pkt, frame_size); | |
500 | if (result != frame_size) | |
501 | return result; | |
502 | ||
503 | /* Contrary to normal WMV2 video, the bit stream in XMV's | |
504 | * WMV2 is little-endian. | |
505 | * TODO: This manual swap is of course suboptimal. | |
506 | */ | |
507 | for (data = pkt->data, end = pkt->data + frame_size; data < end; data += 4) | |
508 | AV_WB32(data, AV_RL32(data)); | |
509 | ||
510 | pkt->stream_index = video->stream_index; | |
511 | ||
512 | /* Calculate the PTS */ | |
513 | ||
514 | video->last_pts = frame_timestamp + video->pts; | |
515 | ||
516 | pkt->duration = 0; | |
517 | pkt->pts = video->last_pts; | |
518 | pkt->dts = AV_NOPTS_VALUE; | |
519 | ||
520 | video->pts += frame_timestamp; | |
521 | ||
522 | /* Keyframe? */ | |
523 | pkt->flags = (pkt->data[0] & 0x80) ? 0 : AV_PKT_FLAG_KEY; | |
524 | ||
525 | /* Advance offset */ | |
526 | video->data_size -= frame_size + 4; | |
527 | video->data_offset += frame_size + 4; | |
528 | ||
529 | return 0; | |
530 | } | |
531 | ||
532 | static int xmv_read_packet(AVFormatContext *s, | |
533 | AVPacket *pkt) | |
534 | { | |
535 | XMVDemuxContext *xmv = s->priv_data; | |
536 | int result; | |
537 | ||
538 | if (xmv->video.current_frame == xmv->video.frame_count) { | |
539 | /* No frames left in this packet, so we fetch a new one */ | |
540 | ||
541 | result = xmv_fetch_new_packet(s); | |
542 | if (result) | |
543 | return result; | |
544 | } | |
545 | ||
546 | if (xmv->current_stream == 0) { | |
547 | /* Fetch a video frame */ | |
548 | ||
549 | result = xmv_fetch_video_packet(s, pkt); | |
550 | if (result) | |
551 | return result; | |
552 | ||
553 | } else { | |
554 | /* Fetch an audio frame */ | |
555 | ||
556 | result = xmv_fetch_audio_packet(s, pkt, xmv->current_stream - 1); | |
557 | if (result) | |
558 | return result; | |
559 | } | |
560 | ||
561 | /* Increase our counters */ | |
562 | if (++xmv->current_stream >= xmv->stream_count) { | |
563 | xmv->current_stream = 0; | |
564 | xmv->video.current_frame += 1; | |
565 | } | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
570 | AVInputFormat ff_xmv_demuxer = { | |
571 | .name = "xmv", | |
572 | .long_name = NULL_IF_CONFIG_SMALL("Microsoft XMV"), | |
573 | .priv_data_size = sizeof(XMVDemuxContext), | |
574 | .read_probe = xmv_probe, | |
575 | .read_header = xmv_read_header, | |
576 | .read_packet = xmv_read_packet, | |
577 | .read_close = xmv_read_close, | |
578 | }; |