1 /*
2 * Directshow capture interface
3 * Copyright (c) 2010 Ramiro Polla
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 #include "dshow_capture.h"
23 #include "libavutil/parseutils.h"
24 #include "libavutil/pixdesc.h"
25 #include "libavutil/opt.h"
26 #include "libavformat/internal.h"
27 #include "libavformat/riff.h"
28 #include "avdevice.h"
29 #include "libavcodec/raw.h"
30 #include "objidl.h"
31 #include "shlwapi.h"
32
33
dshow_pixfmt(DWORD biCompression,WORD biBitCount)34 static enum AVPixelFormat dshow_pixfmt(DWORD biCompression, WORD biBitCount)
35 {
36 switch(biCompression) {
37 case BI_BITFIELDS:
38 case BI_RGB:
39 switch(biBitCount) { /* 1-8 are untested */
40 case 1:
41 return AV_PIX_FMT_MONOWHITE;
42 case 4:
43 return AV_PIX_FMT_RGB4;
44 case 8:
45 return AV_PIX_FMT_RGB8;
46 case 16:
47 return AV_PIX_FMT_RGB555;
48 case 24:
49 return AV_PIX_FMT_BGR24;
50 case 32:
51 return AV_PIX_FMT_0RGB32;
52 }
53 }
54 return avpriv_find_pix_fmt(avpriv_get_raw_pix_fmt_tags(), biCompression); // all others
55 }
56
57 static int
dshow_read_close(AVFormatContext * s)58 dshow_read_close(AVFormatContext *s)
59 {
60 struct dshow_ctx *ctx = s->priv_data;
61 PacketList *pktl;
62
63 if (ctx->control) {
64 IMediaControl_Stop(ctx->control);
65 IMediaControl_Release(ctx->control);
66 }
67
68 if (ctx->media_event)
69 IMediaEvent_Release(ctx->media_event);
70
71 if (ctx->graph) {
72 IEnumFilters *fenum;
73 int r;
74 r = IGraphBuilder_EnumFilters(ctx->graph, &fenum);
75 if (r == S_OK) {
76 IBaseFilter *f;
77 IEnumFilters_Reset(fenum);
78 while (IEnumFilters_Next(fenum, 1, &f, NULL) == S_OK) {
79 if (IGraphBuilder_RemoveFilter(ctx->graph, f) == S_OK)
80 IEnumFilters_Reset(fenum); /* When a filter is removed,
81 * the list must be reset. */
82 IBaseFilter_Release(f);
83 }
84 IEnumFilters_Release(fenum);
85 }
86 IGraphBuilder_Release(ctx->graph);
87 }
88
89 if (ctx->capture_pin[VideoDevice])
90 ff_dshow_pin_Release(ctx->capture_pin[VideoDevice]);
91 if (ctx->capture_pin[AudioDevice])
92 ff_dshow_pin_Release(ctx->capture_pin[AudioDevice]);
93 if (ctx->capture_filter[VideoDevice])
94 ff_dshow_filter_Release(ctx->capture_filter[VideoDevice]);
95 if (ctx->capture_filter[AudioDevice])
96 ff_dshow_filter_Release(ctx->capture_filter[AudioDevice]);
97
98 if (ctx->device_pin[VideoDevice])
99 IPin_Release(ctx->device_pin[VideoDevice]);
100 if (ctx->device_pin[AudioDevice])
101 IPin_Release(ctx->device_pin[AudioDevice]);
102 if (ctx->device_filter[VideoDevice])
103 IBaseFilter_Release(ctx->device_filter[VideoDevice]);
104 if (ctx->device_filter[AudioDevice])
105 IBaseFilter_Release(ctx->device_filter[AudioDevice]);
106
107 av_freep(&ctx->device_name[0]);
108 av_freep(&ctx->device_name[1]);
109 av_freep(&ctx->device_unique_name[0]);
110 av_freep(&ctx->device_unique_name[1]);
111
112 if(ctx->mutex)
113 CloseHandle(ctx->mutex);
114 if(ctx->event[0])
115 CloseHandle(ctx->event[0]);
116 if(ctx->event[1])
117 CloseHandle(ctx->event[1]);
118
119 pktl = ctx->pktl;
120 while (pktl) {
121 PacketList *next = pktl->next;
122 av_packet_unref(&pktl->pkt);
123 av_free(pktl);
124 pktl = next;
125 }
126
127 CoUninitialize();
128
129 return 0;
130 }
131
dup_wchar_to_utf8(wchar_t * w)132 static char *dup_wchar_to_utf8(wchar_t *w)
133 {
134 char *s = NULL;
135 int l = WideCharToMultiByte(CP_UTF8, 0, w, -1, 0, 0, 0, 0);
136 s = av_malloc(l);
137 if (s)
138 WideCharToMultiByte(CP_UTF8, 0, w, -1, s, l, 0, 0);
139 return s;
140 }
141
shall_we_drop(AVFormatContext * s,int index,enum dshowDeviceType devtype)142 static int shall_we_drop(AVFormatContext *s, int index, enum dshowDeviceType devtype)
143 {
144 struct dshow_ctx *ctx = s->priv_data;
145 static const uint8_t dropscore[] = {62, 75, 87, 100};
146 const int ndropscores = FF_ARRAY_ELEMS(dropscore);
147 unsigned int buffer_fullness = (ctx->curbufsize[index]*100)/s->max_picture_buffer;
148 const char *devtypename = (devtype == VideoDevice) ? "video" : "audio";
149
150 if(dropscore[++ctx->video_frame_num%ndropscores] <= buffer_fullness) {
151 av_log(s, AV_LOG_ERROR,
152 "real-time buffer [%s] [%s input] too full or near too full (%d%% of size: %d [rtbufsize parameter])! frame dropped!\n",
153 ctx->device_name[devtype], devtypename, buffer_fullness, s->max_picture_buffer);
154 return 1;
155 }
156
157 return 0;
158 }
159
160 static void
callback(void * priv_data,int index,uint8_t * buf,int buf_size,int64_t time,enum dshowDeviceType devtype)161 callback(void *priv_data, int index, uint8_t *buf, int buf_size, int64_t time, enum dshowDeviceType devtype)
162 {
163 AVFormatContext *s = priv_data;
164 struct dshow_ctx *ctx = s->priv_data;
165 PacketList **ppktl, *pktl_next;
166
167 // dump_videohdr(s, vdhdr);
168
169 WaitForSingleObject(ctx->mutex, INFINITE);
170
171 if(shall_we_drop(s, index, devtype))
172 goto fail;
173
174 pktl_next = av_mallocz(sizeof(PacketList));
175 if(!pktl_next)
176 goto fail;
177
178 if(av_new_packet(&pktl_next->pkt, buf_size) < 0) {
179 av_free(pktl_next);
180 goto fail;
181 }
182
183 pktl_next->pkt.stream_index = index;
184 pktl_next->pkt.pts = time;
185 memcpy(pktl_next->pkt.data, buf, buf_size);
186
187 for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next);
188 *ppktl = pktl_next;
189 ctx->curbufsize[index] += buf_size;
190
191 SetEvent(ctx->event[1]);
192 ReleaseMutex(ctx->mutex);
193
194 return;
195 fail:
196 ReleaseMutex(ctx->mutex);
197 return;
198 }
199
200 /**
201 * Cycle through available devices using the device enumerator devenum,
202 * retrieve the device with type specified by devtype and return the
203 * pointer to the object found in *pfilter.
204 * If pfilter is NULL, list all device names.
205 */
206 static int
dshow_cycle_devices(AVFormatContext * avctx,ICreateDevEnum * devenum,enum dshowDeviceType devtype,enum dshowSourceFilterType sourcetype,IBaseFilter ** pfilter,char ** device_unique_name)207 dshow_cycle_devices(AVFormatContext *avctx, ICreateDevEnum *devenum,
208 enum dshowDeviceType devtype, enum dshowSourceFilterType sourcetype,
209 IBaseFilter **pfilter, char **device_unique_name)
210 {
211 struct dshow_ctx *ctx = avctx->priv_data;
212 IBaseFilter *device_filter = NULL;
213 IEnumMoniker *classenum = NULL;
214 IMoniker *m = NULL;
215 const char *device_name = ctx->device_name[devtype];
216 int skip = (devtype == VideoDevice) ? ctx->video_device_number
217 : ctx->audio_device_number;
218 int r;
219
220 const GUID *device_guid[2] = { &CLSID_VideoInputDeviceCategory,
221 &CLSID_AudioInputDeviceCategory };
222 const char *devtypename = (devtype == VideoDevice) ? "video" : "audio only";
223 const char *sourcetypename = (sourcetype == VideoSourceDevice) ? "video" : "audio";
224
225 r = ICreateDevEnum_CreateClassEnumerator(devenum, device_guid[sourcetype],
226 (IEnumMoniker **) &classenum, 0);
227 if (r != S_OK) {
228 av_log(avctx, AV_LOG_ERROR, "Could not enumerate %s devices (or none found).\n",
229 devtypename);
230 return AVERROR(EIO);
231 }
232
233 while (!device_filter && IEnumMoniker_Next(classenum, 1, &m, NULL) == S_OK) {
234 IPropertyBag *bag = NULL;
235 char *friendly_name = NULL;
236 char *unique_name = NULL;
237 VARIANT var;
238 IBindCtx *bind_ctx = NULL;
239 LPOLESTR olestr = NULL;
240 LPMALLOC co_malloc = NULL;
241 int i;
242
243 r = CoGetMalloc(1, &co_malloc);
244 if (r != S_OK)
245 goto fail1;
246 r = CreateBindCtx(0, &bind_ctx);
247 if (r != S_OK)
248 goto fail1;
249 /* GetDisplayname works for both video and audio, DevicePath doesn't */
250 r = IMoniker_GetDisplayName(m, bind_ctx, NULL, &olestr);
251 if (r != S_OK)
252 goto fail1;
253 unique_name = dup_wchar_to_utf8(olestr);
254 /* replace ':' with '_' since we use : to delineate between sources */
255 for (i = 0; i < strlen(unique_name); i++) {
256 if (unique_name[i] == ':')
257 unique_name[i] = '_';
258 }
259
260 r = IMoniker_BindToStorage(m, 0, 0, &IID_IPropertyBag, (void *) &bag);
261 if (r != S_OK)
262 goto fail1;
263
264 var.vt = VT_BSTR;
265 r = IPropertyBag_Read(bag, L"FriendlyName", &var, NULL);
266 if (r != S_OK)
267 goto fail1;
268 friendly_name = dup_wchar_to_utf8(var.bstrVal);
269
270 if (pfilter) {
271 if (strcmp(device_name, friendly_name) && strcmp(device_name, unique_name))
272 goto fail1;
273
274 if (!skip--) {
275 r = IMoniker_BindToObject(m, 0, 0, &IID_IBaseFilter, (void *) &device_filter);
276 if (r != S_OK) {
277 av_log(avctx, AV_LOG_ERROR, "Unable to BindToObject for %s\n", device_name);
278 goto fail1;
279 }
280 *device_unique_name = unique_name;
281 unique_name = NULL;
282 // success, loop will end now
283 }
284 } else {
285 av_log(avctx, AV_LOG_INFO, " \"%s\"\n", friendly_name);
286 av_log(avctx, AV_LOG_INFO, " Alternative name \"%s\"\n", unique_name);
287 }
288
289 fail1:
290 if (olestr && co_malloc)
291 IMalloc_Free(co_malloc, olestr);
292 if (bind_ctx)
293 IBindCtx_Release(bind_ctx);
294 av_freep(&friendly_name);
295 av_freep(&unique_name);
296 if (bag)
297 IPropertyBag_Release(bag);
298 IMoniker_Release(m);
299 }
300
301 IEnumMoniker_Release(classenum);
302
303 if (pfilter) {
304 if (!device_filter) {
305 av_log(avctx, AV_LOG_ERROR, "Could not find %s device with name [%s] among source devices of type %s.\n",
306 devtypename, device_name, sourcetypename);
307 return AVERROR(EIO);
308 }
309 *pfilter = device_filter;
310 }
311
312 return 0;
313 }
314
315 /**
316 * Cycle through available formats using the specified pin,
317 * try to set parameters specified through AVOptions and if successful
318 * return 1 in *pformat_set.
319 * If pformat_set is NULL, list all pin capabilities.
320 */
321 static void
dshow_cycle_formats(AVFormatContext * avctx,enum dshowDeviceType devtype,IPin * pin,int * pformat_set)322 dshow_cycle_formats(AVFormatContext *avctx, enum dshowDeviceType devtype,
323 IPin *pin, int *pformat_set)
324 {
325 struct dshow_ctx *ctx = avctx->priv_data;
326 IAMStreamConfig *config = NULL;
327 AM_MEDIA_TYPE *type = NULL;
328 int format_set = 0;
329 void *caps = NULL;
330 int i, n, size, r;
331
332 if (IPin_QueryInterface(pin, &IID_IAMStreamConfig, (void **) &config) != S_OK)
333 return;
334 if (IAMStreamConfig_GetNumberOfCapabilities(config, &n, &size) != S_OK)
335 goto end;
336
337 caps = av_malloc(size);
338 if (!caps)
339 goto end;
340
341 for (i = 0; i < n && !format_set; i++) {
342 r = IAMStreamConfig_GetStreamCaps(config, i, &type, (void *) caps);
343 if (r != S_OK)
344 goto next;
345 #if DSHOWDEBUG
346 ff_print_AM_MEDIA_TYPE(type);
347 #endif
348
349 if (devtype == VideoDevice) {
350 VIDEO_STREAM_CONFIG_CAPS *vcaps = caps;
351 BITMAPINFOHEADER *bih;
352 int64_t *fr;
353 const AVCodecTag *const tags[] = { avformat_get_riff_video_tags(), NULL };
354 #if DSHOWDEBUG
355 ff_print_VIDEO_STREAM_CONFIG_CAPS(vcaps);
356 #endif
357 if (IsEqualGUID(&type->formattype, &FORMAT_VideoInfo)) {
358 VIDEOINFOHEADER *v = (void *) type->pbFormat;
359 fr = &v->AvgTimePerFrame;
360 bih = &v->bmiHeader;
361 } else if (IsEqualGUID(&type->formattype, &FORMAT_VideoInfo2)) {
362 VIDEOINFOHEADER2 *v = (void *) type->pbFormat;
363 fr = &v->AvgTimePerFrame;
364 bih = &v->bmiHeader;
365 } else {
366 goto next;
367 }
368 if (!pformat_set) {
369 enum AVPixelFormat pix_fmt = dshow_pixfmt(bih->biCompression, bih->biBitCount);
370 if (pix_fmt == AV_PIX_FMT_NONE) {
371 enum AVCodecID codec_id = av_codec_get_id(tags, bih->biCompression);
372 AVCodec *codec = avcodec_find_decoder(codec_id);
373 if (codec_id == AV_CODEC_ID_NONE || !codec) {
374 av_log(avctx, AV_LOG_INFO, " unknown compression type 0x%X", (int) bih->biCompression);
375 } else {
376 av_log(avctx, AV_LOG_INFO, " vcodec=%s", codec->name);
377 }
378 } else {
379 av_log(avctx, AV_LOG_INFO, " pixel_format=%s", av_get_pix_fmt_name(pix_fmt));
380 }
381 av_log(avctx, AV_LOG_INFO, " min s=%ldx%ld fps=%g max s=%ldx%ld fps=%g\n",
382 vcaps->MinOutputSize.cx, vcaps->MinOutputSize.cy,
383 1e7 / vcaps->MaxFrameInterval,
384 vcaps->MaxOutputSize.cx, vcaps->MaxOutputSize.cy,
385 1e7 / vcaps->MinFrameInterval);
386 continue;
387 }
388 if (ctx->video_codec_id != AV_CODEC_ID_RAWVIDEO) {
389 if (ctx->video_codec_id != av_codec_get_id(tags, bih->biCompression))
390 goto next;
391 }
392 if (ctx->pixel_format != AV_PIX_FMT_NONE &&
393 ctx->pixel_format != dshow_pixfmt(bih->biCompression, bih->biBitCount)) {
394 goto next;
395 }
396 if (ctx->framerate) {
397 int64_t framerate = ((int64_t) ctx->requested_framerate.den*10000000)
398 / ctx->requested_framerate.num;
399 if (framerate > vcaps->MaxFrameInterval ||
400 framerate < vcaps->MinFrameInterval)
401 goto next;
402 *fr = framerate;
403 }
404 if (ctx->requested_width && ctx->requested_height) {
405 if (ctx->requested_width > vcaps->MaxOutputSize.cx ||
406 ctx->requested_width < vcaps->MinOutputSize.cx ||
407 ctx->requested_height > vcaps->MaxOutputSize.cy ||
408 ctx->requested_height < vcaps->MinOutputSize.cy)
409 goto next;
410 bih->biWidth = ctx->requested_width;
411 bih->biHeight = ctx->requested_height;
412 }
413 } else {
414 AUDIO_STREAM_CONFIG_CAPS *acaps = caps;
415 WAVEFORMATEX *fx;
416 #if DSHOWDEBUG
417 ff_print_AUDIO_STREAM_CONFIG_CAPS(acaps);
418 #endif
419 if (IsEqualGUID(&type->formattype, &FORMAT_WaveFormatEx)) {
420 fx = (void *) type->pbFormat;
421 } else {
422 goto next;
423 }
424 if (!pformat_set) {
425 av_log(avctx, AV_LOG_INFO, " min ch=%lu bits=%lu rate=%6lu max ch=%lu bits=%lu rate=%6lu\n",
426 acaps->MinimumChannels, acaps->MinimumBitsPerSample, acaps->MinimumSampleFrequency,
427 acaps->MaximumChannels, acaps->MaximumBitsPerSample, acaps->MaximumSampleFrequency);
428 continue;
429 }
430 if (ctx->sample_rate) {
431 if (ctx->sample_rate > acaps->MaximumSampleFrequency ||
432 ctx->sample_rate < acaps->MinimumSampleFrequency)
433 goto next;
434 fx->nSamplesPerSec = ctx->sample_rate;
435 }
436 if (ctx->sample_size) {
437 if (ctx->sample_size > acaps->MaximumBitsPerSample ||
438 ctx->sample_size < acaps->MinimumBitsPerSample)
439 goto next;
440 fx->wBitsPerSample = ctx->sample_size;
441 }
442 if (ctx->channels) {
443 if (ctx->channels > acaps->MaximumChannels ||
444 ctx->channels < acaps->MinimumChannels)
445 goto next;
446 fx->nChannels = ctx->channels;
447 }
448 }
449 if (IAMStreamConfig_SetFormat(config, type) != S_OK)
450 goto next;
451 format_set = 1;
452 next:
453 if (type->pbFormat)
454 CoTaskMemFree(type->pbFormat);
455 CoTaskMemFree(type);
456 }
457 end:
458 IAMStreamConfig_Release(config);
459 av_free(caps);
460 if (pformat_set)
461 *pformat_set = format_set;
462 }
463
464 /**
465 * Set audio device buffer size in milliseconds (which can directly impact
466 * latency, depending on the device).
467 */
468 static int
dshow_set_audio_buffer_size(AVFormatContext * avctx,IPin * pin)469 dshow_set_audio_buffer_size(AVFormatContext *avctx, IPin *pin)
470 {
471 struct dshow_ctx *ctx = avctx->priv_data;
472 IAMBufferNegotiation *buffer_negotiation = NULL;
473 ALLOCATOR_PROPERTIES props = { -1, -1, -1, -1 };
474 IAMStreamConfig *config = NULL;
475 AM_MEDIA_TYPE *type = NULL;
476 int ret = AVERROR(EIO);
477
478 if (IPin_QueryInterface(pin, &IID_IAMStreamConfig, (void **) &config) != S_OK)
479 goto end;
480 if (IAMStreamConfig_GetFormat(config, &type) != S_OK)
481 goto end;
482 if (!IsEqualGUID(&type->formattype, &FORMAT_WaveFormatEx))
483 goto end;
484
485 props.cbBuffer = (((WAVEFORMATEX *) type->pbFormat)->nAvgBytesPerSec)
486 * ctx->audio_buffer_size / 1000;
487
488 if (IPin_QueryInterface(pin, &IID_IAMBufferNegotiation, (void **) &buffer_negotiation) != S_OK)
489 goto end;
490 if (IAMBufferNegotiation_SuggestAllocatorProperties(buffer_negotiation, &props) != S_OK)
491 goto end;
492
493 ret = 0;
494
495 end:
496 if (buffer_negotiation)
497 IAMBufferNegotiation_Release(buffer_negotiation);
498 if (type) {
499 if (type->pbFormat)
500 CoTaskMemFree(type->pbFormat);
501 CoTaskMemFree(type);
502 }
503 if (config)
504 IAMStreamConfig_Release(config);
505
506 return ret;
507 }
508
509 /**
510 * Pops up a user dialog allowing them to adjust properties for the given filter, if possible.
511 */
512 void
ff_dshow_show_filter_properties(IBaseFilter * device_filter,AVFormatContext * avctx)513 ff_dshow_show_filter_properties(IBaseFilter *device_filter, AVFormatContext *avctx) {
514 ISpecifyPropertyPages *property_pages = NULL;
515 IUnknown *device_filter_iunknown = NULL;
516 HRESULT hr;
517 FILTER_INFO filter_info = {0}; /* a warning on this line is false positive GCC bug 53119 AFAICT */
518 CAUUID ca_guid = {0};
519
520 hr = IBaseFilter_QueryInterface(device_filter, &IID_ISpecifyPropertyPages, (void **)&property_pages);
521 if (hr != S_OK) {
522 av_log(avctx, AV_LOG_WARNING, "requested filter does not have a property page to show");
523 goto end;
524 }
525 hr = IBaseFilter_QueryFilterInfo(device_filter, &filter_info);
526 if (hr != S_OK) {
527 goto fail;
528 }
529 hr = IBaseFilter_QueryInterface(device_filter, &IID_IUnknown, (void **)&device_filter_iunknown);
530 if (hr != S_OK) {
531 goto fail;
532 }
533 hr = ISpecifyPropertyPages_GetPages(property_pages, &ca_guid);
534 if (hr != S_OK) {
535 goto fail;
536 }
537 hr = OleCreatePropertyFrame(NULL, 0, 0, filter_info.achName, 1, &device_filter_iunknown, ca_guid.cElems,
538 ca_guid.pElems, 0, 0, NULL);
539 if (hr != S_OK) {
540 goto fail;
541 }
542 goto end;
543 fail:
544 av_log(avctx, AV_LOG_ERROR, "Failure showing property pages for filter");
545 end:
546 if (property_pages)
547 ISpecifyPropertyPages_Release(property_pages);
548 if (device_filter_iunknown)
549 IUnknown_Release(device_filter_iunknown);
550 if (filter_info.pGraph)
551 IFilterGraph_Release(filter_info.pGraph);
552 if (ca_guid.pElems)
553 CoTaskMemFree(ca_guid.pElems);
554 }
555
556 /**
557 * Cycle through available pins using the device_filter device, of type
558 * devtype, retrieve the first output pin and return the pointer to the
559 * object found in *ppin.
560 * If ppin is NULL, cycle through all pins listing audio/video capabilities.
561 */
562 static int
dshow_cycle_pins(AVFormatContext * avctx,enum dshowDeviceType devtype,enum dshowSourceFilterType sourcetype,IBaseFilter * device_filter,IPin ** ppin)563 dshow_cycle_pins(AVFormatContext *avctx, enum dshowDeviceType devtype,
564 enum dshowSourceFilterType sourcetype, IBaseFilter *device_filter, IPin **ppin)
565 {
566 struct dshow_ctx *ctx = avctx->priv_data;
567 IEnumPins *pins = 0;
568 IPin *device_pin = NULL;
569 IPin *pin;
570 int r;
571
572 const GUID *mediatype[2] = { &MEDIATYPE_Video, &MEDIATYPE_Audio };
573 const char *devtypename = (devtype == VideoDevice) ? "video" : "audio only";
574 const char *sourcetypename = (sourcetype == VideoSourceDevice) ? "video" : "audio";
575
576 int set_format = (devtype == VideoDevice && (ctx->framerate ||
577 (ctx->requested_width && ctx->requested_height) ||
578 ctx->pixel_format != AV_PIX_FMT_NONE ||
579 ctx->video_codec_id != AV_CODEC_ID_RAWVIDEO))
580 || (devtype == AudioDevice && (ctx->channels || ctx->sample_rate));
581 int format_set = 0;
582 int should_show_properties = (devtype == VideoDevice) ? ctx->show_video_device_dialog : ctx->show_audio_device_dialog;
583
584 if (should_show_properties)
585 ff_dshow_show_filter_properties(device_filter, avctx);
586
587 r = IBaseFilter_EnumPins(device_filter, &pins);
588 if (r != S_OK) {
589 av_log(avctx, AV_LOG_ERROR, "Could not enumerate pins.\n");
590 return AVERROR(EIO);
591 }
592
593 if (!ppin) {
594 av_log(avctx, AV_LOG_INFO, "DirectShow %s device options (from %s devices)\n",
595 devtypename, sourcetypename);
596 }
597
598 while (!device_pin && IEnumPins_Next(pins, 1, &pin, NULL) == S_OK) {
599 IKsPropertySet *p = NULL;
600 IEnumMediaTypes *types = NULL;
601 PIN_INFO info = {0};
602 AM_MEDIA_TYPE *type;
603 GUID category;
604 DWORD r2;
605 char *name_buf = NULL;
606 wchar_t *pin_id = NULL;
607 char *pin_buf = NULL;
608 char *desired_pin_name = devtype == VideoDevice ? ctx->video_pin_name : ctx->audio_pin_name;
609
610 IPin_QueryPinInfo(pin, &info);
611 IBaseFilter_Release(info.pFilter);
612
613 if (info.dir != PINDIR_OUTPUT)
614 goto next;
615 if (IPin_QueryInterface(pin, &IID_IKsPropertySet, (void **) &p) != S_OK)
616 goto next;
617 if (IKsPropertySet_Get(p, &ROPSETID_Pin, AMPROPERTY_PIN_CATEGORY,
618 NULL, 0, &category, sizeof(GUID), &r2) != S_OK)
619 goto next;
620 if (!IsEqualGUID(&category, &PIN_CATEGORY_CAPTURE))
621 goto next;
622 name_buf = dup_wchar_to_utf8(info.achName);
623
624 r = IPin_QueryId(pin, &pin_id);
625 if (r != S_OK) {
626 av_log(avctx, AV_LOG_ERROR, "Could not query pin id\n");
627 return AVERROR(EIO);
628 }
629 pin_buf = dup_wchar_to_utf8(pin_id);
630
631 if (!ppin) {
632 av_log(avctx, AV_LOG_INFO, " Pin \"%s\" (alternative pin name \"%s\")\n", name_buf, pin_buf);
633 dshow_cycle_formats(avctx, devtype, pin, NULL);
634 goto next;
635 }
636
637 if (desired_pin_name) {
638 if(strcmp(name_buf, desired_pin_name) && strcmp(pin_buf, desired_pin_name)) {
639 av_log(avctx, AV_LOG_DEBUG, "skipping pin \"%s\" (\"%s\") != requested \"%s\"\n",
640 name_buf, pin_buf, desired_pin_name);
641 goto next;
642 }
643 }
644
645 if (set_format) {
646 dshow_cycle_formats(avctx, devtype, pin, &format_set);
647 if (!format_set) {
648 goto next;
649 }
650 }
651 if (devtype == AudioDevice && ctx->audio_buffer_size) {
652 if (dshow_set_audio_buffer_size(avctx, pin) < 0) {
653 av_log(avctx, AV_LOG_ERROR, "unable to set audio buffer size %d to pin, using pin anyway...", ctx->audio_buffer_size);
654 }
655 }
656
657 if (IPin_EnumMediaTypes(pin, &types) != S_OK)
658 goto next;
659
660 IEnumMediaTypes_Reset(types);
661 /* in case format_set was not called, just verify the majortype */
662 while (!device_pin && IEnumMediaTypes_Next(types, 1, &type, NULL) == S_OK) {
663 if (IsEqualGUID(&type->majortype, mediatype[devtype])) {
664 device_pin = pin;
665 av_log(avctx, AV_LOG_DEBUG, "Selecting pin %s on %s\n", name_buf, devtypename);
666 goto next;
667 }
668 CoTaskMemFree(type);
669 }
670
671 next:
672 if (types)
673 IEnumMediaTypes_Release(types);
674 if (p)
675 IKsPropertySet_Release(p);
676 if (device_pin != pin)
677 IPin_Release(pin);
678 av_free(name_buf);
679 av_free(pin_buf);
680 if (pin_id)
681 CoTaskMemFree(pin_id);
682 }
683
684 IEnumPins_Release(pins);
685
686 if (ppin) {
687 if (set_format && !format_set) {
688 av_log(avctx, AV_LOG_ERROR, "Could not set %s options\n", devtypename);
689 return AVERROR(EIO);
690 }
691 if (!device_pin) {
692 av_log(avctx, AV_LOG_ERROR,
693 "Could not find output pin from %s capture device.\n", devtypename);
694 return AVERROR(EIO);
695 }
696 *ppin = device_pin;
697 }
698
699 return 0;
700 }
701
702 /**
703 * List options for device with type devtype, source filter type sourcetype
704 *
705 * @param devenum device enumerator used for accessing the device
706 */
707 static int
dshow_list_device_options(AVFormatContext * avctx,ICreateDevEnum * devenum,enum dshowDeviceType devtype,enum dshowSourceFilterType sourcetype)708 dshow_list_device_options(AVFormatContext *avctx, ICreateDevEnum *devenum,
709 enum dshowDeviceType devtype, enum dshowSourceFilterType sourcetype)
710 {
711 struct dshow_ctx *ctx = avctx->priv_data;
712 IBaseFilter *device_filter = NULL;
713 char *device_unique_name = NULL;
714 int r;
715
716 if ((r = dshow_cycle_devices(avctx, devenum, devtype, sourcetype, &device_filter, &device_unique_name)) < 0)
717 return r;
718 ctx->device_filter[devtype] = device_filter;
719 if ((r = dshow_cycle_pins(avctx, devtype, sourcetype, device_filter, NULL)) < 0)
720 return r;
721 av_freep(&device_unique_name);
722 return 0;
723 }
724
725 static int
dshow_open_device(AVFormatContext * avctx,ICreateDevEnum * devenum,enum dshowDeviceType devtype,enum dshowSourceFilterType sourcetype)726 dshow_open_device(AVFormatContext *avctx, ICreateDevEnum *devenum,
727 enum dshowDeviceType devtype, enum dshowSourceFilterType sourcetype)
728 {
729 struct dshow_ctx *ctx = avctx->priv_data;
730 IBaseFilter *device_filter = NULL;
731 char *device_filter_unique_name = NULL;
732 IGraphBuilder *graph = ctx->graph;
733 IPin *device_pin = NULL;
734 DShowPin *capture_pin = NULL;
735 DShowFilter *capture_filter = NULL;
736 ICaptureGraphBuilder2 *graph_builder2 = NULL;
737 int ret = AVERROR(EIO);
738 int r;
739 IStream *ifile_stream = NULL;
740 IStream *ofile_stream = NULL;
741 IPersistStream *pers_stream = NULL;
742 enum dshowDeviceType otherDevType = (devtype == VideoDevice) ? AudioDevice : VideoDevice;
743
744 const wchar_t *filter_name[2] = { L"Audio capture filter", L"Video capture filter" };
745
746
747 if ( ((ctx->audio_filter_load_file) && (strlen(ctx->audio_filter_load_file)>0) && (sourcetype == AudioSourceDevice)) ||
748 ((ctx->video_filter_load_file) && (strlen(ctx->video_filter_load_file)>0) && (sourcetype == VideoSourceDevice)) ) {
749 HRESULT hr;
750 char *filename = NULL;
751
752 if (sourcetype == AudioSourceDevice)
753 filename = ctx->audio_filter_load_file;
754 else
755 filename = ctx->video_filter_load_file;
756
757 hr = SHCreateStreamOnFile ((LPCSTR) filename, STGM_READ, &ifile_stream);
758 if (S_OK != hr) {
759 av_log(avctx, AV_LOG_ERROR, "Could not open capture filter description file.\n");
760 goto error;
761 }
762
763 hr = OleLoadFromStream(ifile_stream, &IID_IBaseFilter, (void **) &device_filter);
764 if (hr != S_OK) {
765 av_log(avctx, AV_LOG_ERROR, "Could not load capture filter from file.\n");
766 goto error;
767 }
768
769 if (sourcetype == AudioSourceDevice)
770 av_log(avctx, AV_LOG_INFO, "Audio-");
771 else
772 av_log(avctx, AV_LOG_INFO, "Video-");
773 av_log(avctx, AV_LOG_INFO, "Capture filter loaded successfully from file \"%s\".\n", filename);
774 } else {
775
776 if ((r = dshow_cycle_devices(avctx, devenum, devtype, sourcetype, &device_filter, &device_filter_unique_name)) < 0) {
777 ret = r;
778 goto error;
779 }
780 }
781 if (ctx->device_filter[otherDevType]) {
782 // avoid adding add two instances of the same device to the graph, one for video, one for audio
783 // a few devices don't support this (could also do this check earlier to avoid double crossbars, etc. but they seem OK)
784 if (strcmp(device_filter_unique_name, ctx->device_unique_name[otherDevType]) == 0) {
785 av_log(avctx, AV_LOG_DEBUG, "reusing previous graph capture filter... %s\n", device_filter_unique_name);
786 IBaseFilter_Release(device_filter);
787 device_filter = ctx->device_filter[otherDevType];
788 IBaseFilter_AddRef(ctx->device_filter[otherDevType]);
789 } else {
790 av_log(avctx, AV_LOG_DEBUG, "not reusing previous graph capture filter %s != %s\n", device_filter_unique_name, ctx->device_unique_name[otherDevType]);
791 }
792 }
793
794 ctx->device_filter [devtype] = device_filter;
795 ctx->device_unique_name [devtype] = device_filter_unique_name;
796
797 r = IGraphBuilder_AddFilter(graph, device_filter, NULL);
798 if (r != S_OK) {
799 av_log(avctx, AV_LOG_ERROR, "Could not add device filter to graph.\n");
800 goto error;
801 }
802
803 if ((r = dshow_cycle_pins(avctx, devtype, sourcetype, device_filter, &device_pin)) < 0) {
804 ret = r;
805 goto error;
806 }
807
808 ctx->device_pin[devtype] = device_pin;
809
810 capture_filter = ff_dshow_filter_Create(avctx, callback, devtype);
811 if (!capture_filter) {
812 av_log(avctx, AV_LOG_ERROR, "Could not create grabber filter.\n");
813 goto error;
814 }
815 ctx->capture_filter[devtype] = capture_filter;
816
817 if ( ((ctx->audio_filter_save_file) && (strlen(ctx->audio_filter_save_file)>0) && (sourcetype == AudioSourceDevice)) ||
818 ((ctx->video_filter_save_file) && (strlen(ctx->video_filter_save_file)>0) && (sourcetype == VideoSourceDevice)) ) {
819
820 HRESULT hr;
821 char *filename = NULL;
822
823 if (sourcetype == AudioSourceDevice)
824 filename = ctx->audio_filter_save_file;
825 else
826 filename = ctx->video_filter_save_file;
827
828 hr = SHCreateStreamOnFile ((LPCSTR) filename, STGM_CREATE | STGM_READWRITE, &ofile_stream);
829 if (S_OK != hr) {
830 av_log(avctx, AV_LOG_ERROR, "Could not create capture filter description file.\n");
831 goto error;
832 }
833
834 hr = IBaseFilter_QueryInterface(device_filter, &IID_IPersistStream, (void **) &pers_stream);
835 if (hr != S_OK) {
836 av_log(avctx, AV_LOG_ERROR, "Query for IPersistStream failed.\n");
837 goto error;
838 }
839
840 hr = OleSaveToStream(pers_stream, ofile_stream);
841 if (hr != S_OK) {
842 av_log(avctx, AV_LOG_ERROR, "Could not save capture filter \n");
843 goto error;
844 }
845
846 hr = IStream_Commit(ofile_stream, STGC_DEFAULT);
847 if (S_OK != hr) {
848 av_log(avctx, AV_LOG_ERROR, "Could not commit capture filter data to file.\n");
849 goto error;
850 }
851
852 if (sourcetype == AudioSourceDevice)
853 av_log(avctx, AV_LOG_INFO, "Audio-");
854 else
855 av_log(avctx, AV_LOG_INFO, "Video-");
856 av_log(avctx, AV_LOG_INFO, "Capture filter saved successfully to file \"%s\".\n", filename);
857 }
858
859 r = IGraphBuilder_AddFilter(graph, (IBaseFilter *) capture_filter,
860 filter_name[devtype]);
861 if (r != S_OK) {
862 av_log(avctx, AV_LOG_ERROR, "Could not add capture filter to graph\n");
863 goto error;
864 }
865
866 ff_dshow_pin_AddRef(capture_filter->pin);
867 capture_pin = capture_filter->pin;
868 ctx->capture_pin[devtype] = capture_pin;
869
870 r = CoCreateInstance(&CLSID_CaptureGraphBuilder2, NULL, CLSCTX_INPROC_SERVER,
871 &IID_ICaptureGraphBuilder2, (void **) &graph_builder2);
872 if (r != S_OK) {
873 av_log(avctx, AV_LOG_ERROR, "Could not create CaptureGraphBuilder2\n");
874 goto error;
875 }
876 ICaptureGraphBuilder2_SetFiltergraph(graph_builder2, graph);
877 if (r != S_OK) {
878 av_log(avctx, AV_LOG_ERROR, "Could not set graph for CaptureGraphBuilder2\n");
879 goto error;
880 }
881
882 r = ICaptureGraphBuilder2_RenderStream(graph_builder2, NULL, NULL, (IUnknown *) device_pin, NULL /* no intermediate filter */,
883 (IBaseFilter *) capture_filter); /* connect pins, optionally insert intermediate filters like crossbar if necessary */
884
885 if (r != S_OK) {
886 av_log(avctx, AV_LOG_ERROR, "Could not RenderStream to connect pins\n");
887 goto error;
888 }
889
890 r = ff_dshow_try_setup_crossbar_options(graph_builder2, device_filter, devtype, avctx);
891
892 if (r != S_OK) {
893 av_log(avctx, AV_LOG_ERROR, "Could not setup CrossBar\n");
894 goto error;
895 }
896
897 ret = 0;
898
899 error:
900 if (graph_builder2 != NULL)
901 ICaptureGraphBuilder2_Release(graph_builder2);
902
903 if (pers_stream)
904 IPersistStream_Release(pers_stream);
905
906 if (ifile_stream)
907 IStream_Release(ifile_stream);
908
909 if (ofile_stream)
910 IStream_Release(ofile_stream);
911
912 return ret;
913 }
914
waveform_codec_id(enum AVSampleFormat sample_fmt)915 static enum AVCodecID waveform_codec_id(enum AVSampleFormat sample_fmt)
916 {
917 switch (sample_fmt) {
918 case AV_SAMPLE_FMT_U8: return AV_CODEC_ID_PCM_U8;
919 case AV_SAMPLE_FMT_S16: return AV_CODEC_ID_PCM_S16LE;
920 case AV_SAMPLE_FMT_S32: return AV_CODEC_ID_PCM_S32LE;
921 default: return AV_CODEC_ID_NONE; /* Should never happen. */
922 }
923 }
924
sample_fmt_bits_per_sample(int bits)925 static enum AVSampleFormat sample_fmt_bits_per_sample(int bits)
926 {
927 switch (bits) {
928 case 8: return AV_SAMPLE_FMT_U8;
929 case 16: return AV_SAMPLE_FMT_S16;
930 case 32: return AV_SAMPLE_FMT_S32;
931 default: return AV_SAMPLE_FMT_NONE; /* Should never happen. */
932 }
933 }
934
935 static int
dshow_add_device(AVFormatContext * avctx,enum dshowDeviceType devtype)936 dshow_add_device(AVFormatContext *avctx,
937 enum dshowDeviceType devtype)
938 {
939 struct dshow_ctx *ctx = avctx->priv_data;
940 AM_MEDIA_TYPE type;
941 AVCodecParameters *par;
942 AVStream *st;
943 int ret = AVERROR(EIO);
944
945 type.pbFormat = NULL;
946
947 st = avformat_new_stream(avctx, NULL);
948 if (!st) {
949 ret = AVERROR(ENOMEM);
950 goto error;
951 }
952 st->id = devtype;
953
954 ctx->capture_filter[devtype]->stream_index = st->index;
955
956 ff_dshow_pin_ConnectionMediaType(ctx->capture_pin[devtype], &type);
957
958 par = st->codecpar;
959 if (devtype == VideoDevice) {
960 BITMAPINFOHEADER *bih = NULL;
961 AVRational time_base;
962
963 if (IsEqualGUID(&type.formattype, &FORMAT_VideoInfo)) {
964 VIDEOINFOHEADER *v = (void *) type.pbFormat;
965 time_base = (AVRational) { v->AvgTimePerFrame, 10000000 };
966 bih = &v->bmiHeader;
967 } else if (IsEqualGUID(&type.formattype, &FORMAT_VideoInfo2)) {
968 VIDEOINFOHEADER2 *v = (void *) type.pbFormat;
969 time_base = (AVRational) { v->AvgTimePerFrame, 10000000 };
970 bih = &v->bmiHeader;
971 }
972 if (!bih) {
973 av_log(avctx, AV_LOG_ERROR, "Could not get media type.\n");
974 goto error;
975 }
976
977 st->avg_frame_rate = av_inv_q(time_base);
978 st->r_frame_rate = av_inv_q(time_base);
979
980 par->codec_type = AVMEDIA_TYPE_VIDEO;
981 par->width = bih->biWidth;
982 par->height = bih->biHeight;
983 par->codec_tag = bih->biCompression;
984 par->format = dshow_pixfmt(bih->biCompression, bih->biBitCount);
985 if (bih->biCompression == MKTAG('H', 'D', 'Y', 'C')) {
986 av_log(avctx, AV_LOG_DEBUG, "attempt to use full range for HDYC...\n");
987 par->color_range = AVCOL_RANGE_MPEG; // just in case it needs this...
988 }
989 if (par->format == AV_PIX_FMT_NONE) {
990 const AVCodecTag *const tags[] = { avformat_get_riff_video_tags(), NULL };
991 par->codec_id = av_codec_get_id(tags, bih->biCompression);
992 if (par->codec_id == AV_CODEC_ID_NONE) {
993 av_log(avctx, AV_LOG_ERROR, "Unknown compression type. "
994 "Please report type 0x%X.\n", (int) bih->biCompression);
995 ret = AVERROR_PATCHWELCOME;
996 goto error;
997 }
998 par->bits_per_coded_sample = bih->biBitCount;
999 } else {
1000 par->codec_id = AV_CODEC_ID_RAWVIDEO;
1001 if (bih->biCompression == BI_RGB || bih->biCompression == BI_BITFIELDS) {
1002 par->bits_per_coded_sample = bih->biBitCount;
1003 if (par->height < 0) {
1004 par->height *= -1;
1005 } else {
1006 par->extradata = av_malloc(9 + AV_INPUT_BUFFER_PADDING_SIZE);
1007 if (par->extradata) {
1008 par->extradata_size = 9;
1009 memcpy(par->extradata, "BottomUp", 9);
1010 }
1011 }
1012 }
1013 }
1014 } else {
1015 WAVEFORMATEX *fx = NULL;
1016
1017 if (IsEqualGUID(&type.formattype, &FORMAT_WaveFormatEx)) {
1018 fx = (void *) type.pbFormat;
1019 }
1020 if (!fx) {
1021 av_log(avctx, AV_LOG_ERROR, "Could not get media type.\n");
1022 goto error;
1023 }
1024
1025 par->codec_type = AVMEDIA_TYPE_AUDIO;
1026 par->format = sample_fmt_bits_per_sample(fx->wBitsPerSample);
1027 par->codec_id = waveform_codec_id(par->format);
1028 par->sample_rate = fx->nSamplesPerSec;
1029 par->channels = fx->nChannels;
1030 }
1031
1032 avpriv_set_pts_info(st, 64, 1, 10000000);
1033
1034 ret = 0;
1035
1036 error:
1037 if (type.pbFormat)
1038 CoTaskMemFree(type.pbFormat);
1039 return ret;
1040 }
1041
parse_device_name(AVFormatContext * avctx)1042 static int parse_device_name(AVFormatContext *avctx)
1043 {
1044 struct dshow_ctx *ctx = avctx->priv_data;
1045 char **device_name = ctx->device_name;
1046 char *name = av_strdup(avctx->url);
1047 char *tmp = name;
1048 int ret = 1;
1049 char *type;
1050
1051 while ((type = strtok(tmp, "="))) {
1052 char *token = strtok(NULL, ":");
1053 tmp = NULL;
1054
1055 if (!strcmp(type, "video")) {
1056 device_name[0] = token;
1057 } else if (!strcmp(type, "audio")) {
1058 device_name[1] = token;
1059 } else {
1060 device_name[0] = NULL;
1061 device_name[1] = NULL;
1062 break;
1063 }
1064 }
1065
1066 if (!device_name[0] && !device_name[1]) {
1067 ret = 0;
1068 } else {
1069 if (device_name[0])
1070 device_name[0] = av_strdup(device_name[0]);
1071 if (device_name[1])
1072 device_name[1] = av_strdup(device_name[1]);
1073 }
1074
1075 av_free(name);
1076 return ret;
1077 }
1078
dshow_read_header(AVFormatContext * avctx)1079 static int dshow_read_header(AVFormatContext *avctx)
1080 {
1081 struct dshow_ctx *ctx = avctx->priv_data;
1082 IGraphBuilder *graph = NULL;
1083 ICreateDevEnum *devenum = NULL;
1084 IMediaControl *control = NULL;
1085 IMediaEvent *media_event = NULL;
1086 HANDLE media_event_handle;
1087 HANDLE proc;
1088 int ret = AVERROR(EIO);
1089 int r;
1090
1091 CoInitialize(0);
1092
1093 if (!ctx->list_devices && !parse_device_name(avctx)) {
1094 av_log(avctx, AV_LOG_ERROR, "Malformed dshow input string.\n");
1095 goto error;
1096 }
1097
1098 ctx->video_codec_id = avctx->video_codec_id ? avctx->video_codec_id
1099 : AV_CODEC_ID_RAWVIDEO;
1100 if (ctx->pixel_format != AV_PIX_FMT_NONE) {
1101 if (ctx->video_codec_id != AV_CODEC_ID_RAWVIDEO) {
1102 av_log(avctx, AV_LOG_ERROR, "Pixel format may only be set when "
1103 "video codec is not set or set to rawvideo\n");
1104 ret = AVERROR(EINVAL);
1105 goto error;
1106 }
1107 }
1108 if (ctx->framerate) {
1109 r = av_parse_video_rate(&ctx->requested_framerate, ctx->framerate);
1110 if (r < 0) {
1111 av_log(avctx, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", ctx->framerate);
1112 goto error;
1113 }
1114 }
1115
1116 r = CoCreateInstance(&CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER,
1117 &IID_IGraphBuilder, (void **) &graph);
1118 if (r != S_OK) {
1119 av_log(avctx, AV_LOG_ERROR, "Could not create capture graph.\n");
1120 goto error;
1121 }
1122 ctx->graph = graph;
1123
1124 r = CoCreateInstance(&CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER,
1125 &IID_ICreateDevEnum, (void **) &devenum);
1126 if (r != S_OK) {
1127 av_log(avctx, AV_LOG_ERROR, "Could not enumerate system devices.\n");
1128 goto error;
1129 }
1130
1131 if (ctx->list_devices) {
1132 av_log(avctx, AV_LOG_INFO, "DirectShow video devices (some may be both video and audio devices)\n");
1133 dshow_cycle_devices(avctx, devenum, VideoDevice, VideoSourceDevice, NULL, NULL);
1134 av_log(avctx, AV_LOG_INFO, "DirectShow audio devices\n");
1135 dshow_cycle_devices(avctx, devenum, AudioDevice, AudioSourceDevice, NULL, NULL);
1136 ret = AVERROR_EXIT;
1137 goto error;
1138 }
1139 if (ctx->list_options) {
1140 if (ctx->device_name[VideoDevice])
1141 if ((r = dshow_list_device_options(avctx, devenum, VideoDevice, VideoSourceDevice))) {
1142 ret = r;
1143 goto error;
1144 }
1145 if (ctx->device_name[AudioDevice]) {
1146 if (dshow_list_device_options(avctx, devenum, AudioDevice, AudioSourceDevice)) {
1147 /* show audio options from combined video+audio sources as fallback */
1148 if ((r = dshow_list_device_options(avctx, devenum, AudioDevice, VideoSourceDevice))) {
1149 ret = r;
1150 goto error;
1151 }
1152 }
1153 }
1154 }
1155 if (ctx->device_name[VideoDevice]) {
1156 if ((r = dshow_open_device(avctx, devenum, VideoDevice, VideoSourceDevice)) < 0 ||
1157 (r = dshow_add_device(avctx, VideoDevice)) < 0) {
1158 ret = r;
1159 goto error;
1160 }
1161 }
1162 if (ctx->device_name[AudioDevice]) {
1163 if ((r = dshow_open_device(avctx, devenum, AudioDevice, AudioSourceDevice)) < 0 ||
1164 (r = dshow_add_device(avctx, AudioDevice)) < 0) {
1165 av_log(avctx, AV_LOG_INFO, "Searching for audio device within video devices for %s\n", ctx->device_name[AudioDevice]);
1166 /* see if there's a video source with an audio pin with the given audio name */
1167 if ((r = dshow_open_device(avctx, devenum, AudioDevice, VideoSourceDevice)) < 0 ||
1168 (r = dshow_add_device(avctx, AudioDevice)) < 0) {
1169 ret = r;
1170 goto error;
1171 }
1172 }
1173 }
1174 if (ctx->list_options) {
1175 /* allow it to list crossbar options in dshow_open_device */
1176 ret = AVERROR_EXIT;
1177 goto error;
1178 }
1179 ctx->curbufsize[0] = 0;
1180 ctx->curbufsize[1] = 0;
1181 ctx->mutex = CreateMutex(NULL, 0, NULL);
1182 if (!ctx->mutex) {
1183 av_log(avctx, AV_LOG_ERROR, "Could not create Mutex\n");
1184 goto error;
1185 }
1186 ctx->event[1] = CreateEvent(NULL, 1, 0, NULL);
1187 if (!ctx->event[1]) {
1188 av_log(avctx, AV_LOG_ERROR, "Could not create Event\n");
1189 goto error;
1190 }
1191
1192 r = IGraphBuilder_QueryInterface(graph, &IID_IMediaControl, (void **) &control);
1193 if (r != S_OK) {
1194 av_log(avctx, AV_LOG_ERROR, "Could not get media control.\n");
1195 goto error;
1196 }
1197 ctx->control = control;
1198
1199 r = IGraphBuilder_QueryInterface(graph, &IID_IMediaEvent, (void **) &media_event);
1200 if (r != S_OK) {
1201 av_log(avctx, AV_LOG_ERROR, "Could not get media event.\n");
1202 goto error;
1203 }
1204 ctx->media_event = media_event;
1205
1206 r = IMediaEvent_GetEventHandle(media_event, (void *) &media_event_handle);
1207 if (r != S_OK) {
1208 av_log(avctx, AV_LOG_ERROR, "Could not get media event handle.\n");
1209 goto error;
1210 }
1211 proc = GetCurrentProcess();
1212 r = DuplicateHandle(proc, media_event_handle, proc, &ctx->event[0],
1213 0, 0, DUPLICATE_SAME_ACCESS);
1214 if (!r) {
1215 av_log(avctx, AV_LOG_ERROR, "Could not duplicate media event handle.\n");
1216 goto error;
1217 }
1218
1219 r = IMediaControl_Run(control);
1220 if (r == S_FALSE) {
1221 OAFilterState pfs;
1222 r = IMediaControl_GetState(control, 0, &pfs);
1223 }
1224 if (r != S_OK) {
1225 av_log(avctx, AV_LOG_ERROR, "Could not run graph (sometimes caused by a device already in use by other application)\n");
1226 goto error;
1227 }
1228
1229 ret = 0;
1230
1231 error:
1232
1233 if (devenum)
1234 ICreateDevEnum_Release(devenum);
1235
1236 if (ret < 0)
1237 dshow_read_close(avctx);
1238
1239 return ret;
1240 }
1241
1242 /**
1243 * Checks media events from DirectShow and returns -1 on error or EOF. Also
1244 * purges all events that might be in the event queue to stop the trigger
1245 * of event notification.
1246 */
dshow_check_event_queue(IMediaEvent * media_event)1247 static int dshow_check_event_queue(IMediaEvent *media_event)
1248 {
1249 LONG_PTR p1, p2;
1250 long code;
1251 int ret = 0;
1252
1253 while (IMediaEvent_GetEvent(media_event, &code, &p1, &p2, 0) != E_ABORT) {
1254 if (code == EC_COMPLETE || code == EC_DEVICE_LOST || code == EC_ERRORABORT)
1255 ret = -1;
1256 IMediaEvent_FreeEventParams(media_event, code, p1, p2);
1257 }
1258
1259 return ret;
1260 }
1261
dshow_read_packet(AVFormatContext * s,AVPacket * pkt)1262 static int dshow_read_packet(AVFormatContext *s, AVPacket *pkt)
1263 {
1264 struct dshow_ctx *ctx = s->priv_data;
1265 PacketList *pktl = NULL;
1266
1267 while (!ctx->eof && !pktl) {
1268 WaitForSingleObject(ctx->mutex, INFINITE);
1269 pktl = ctx->pktl;
1270 if (pktl) {
1271 *pkt = pktl->pkt;
1272 ctx->pktl = ctx->pktl->next;
1273 av_free(pktl);
1274 ctx->curbufsize[pkt->stream_index] -= pkt->size;
1275 }
1276 ResetEvent(ctx->event[1]);
1277 ReleaseMutex(ctx->mutex);
1278 if (!pktl) {
1279 if (dshow_check_event_queue(ctx->media_event) < 0) {
1280 ctx->eof = 1;
1281 } else if (s->flags & AVFMT_FLAG_NONBLOCK) {
1282 return AVERROR(EAGAIN);
1283 } else {
1284 WaitForMultipleObjects(2, ctx->event, 0, INFINITE);
1285 }
1286 }
1287 }
1288
1289 return ctx->eof ? AVERROR(EIO) : pkt->size;
1290 }
1291
1292 #define OFFSET(x) offsetof(struct dshow_ctx, x)
1293 #define DEC AV_OPT_FLAG_DECODING_PARAM
1294 static const AVOption options[] = {
1295 { "video_size", "set video size given a string such as 640x480 or hd720.", OFFSET(requested_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
1296 { "pixel_format", "set video pixel format", OFFSET(pixel_format), AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_NONE}, -1, INT_MAX, DEC },
1297 { "framerate", "set video frame rate", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
1298 { "sample_rate", "set audio sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC },
1299 { "sample_size", "set audio sample size", OFFSET(sample_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 16, DEC },
1300 { "channels", "set number of audio channels, such as 1 or 2", OFFSET(channels), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC },
1301 { "audio_buffer_size", "set audio device buffer latency size in milliseconds (default is the device's default)", OFFSET(audio_buffer_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC },
1302 { "list_devices", "list available devices", OFFSET(list_devices), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, DEC },
1303 { "list_options", "list available options for specified device", OFFSET(list_options), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, DEC },
1304 { "video_device_number", "set video device number for devices with same name (starts at 0)", OFFSET(video_device_number), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC },
1305 { "audio_device_number", "set audio device number for devices with same name (starts at 0)", OFFSET(audio_device_number), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC },
1306 { "video_pin_name", "select video capture pin by name", OFFSET(video_pin_name),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
1307 { "audio_pin_name", "select audio capture pin by name", OFFSET(audio_pin_name),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
1308 { "crossbar_video_input_pin_number", "set video input pin number for crossbar device", OFFSET(crossbar_video_input_pin_number), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, DEC },
1309 { "crossbar_audio_input_pin_number", "set audio input pin number for crossbar device", OFFSET(crossbar_audio_input_pin_number), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, DEC },
1310 { "show_video_device_dialog", "display property dialog for video capture device", OFFSET(show_video_device_dialog), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC },
1311 { "show_audio_device_dialog", "display property dialog for audio capture device", OFFSET(show_audio_device_dialog), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC },
1312 { "show_video_crossbar_connection_dialog", "display property dialog for crossbar connecting pins filter on video device", OFFSET(show_video_crossbar_connection_dialog), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC },
1313 { "show_audio_crossbar_connection_dialog", "display property dialog for crossbar connecting pins filter on audio device", OFFSET(show_audio_crossbar_connection_dialog), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC },
1314 { "show_analog_tv_tuner_dialog", "display property dialog for analog tuner filter", OFFSET(show_analog_tv_tuner_dialog), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC },
1315 { "show_analog_tv_tuner_audio_dialog", "display property dialog for analog tuner audio filter", OFFSET(show_analog_tv_tuner_audio_dialog), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC },
1316 { "audio_device_load", "load audio capture filter device (and properties) from file", OFFSET(audio_filter_load_file), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
1317 { "audio_device_save", "save audio capture filter device (and properties) to file", OFFSET(audio_filter_save_file), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
1318 { "video_device_load", "load video capture filter device (and properties) from file", OFFSET(video_filter_load_file), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
1319 { "video_device_save", "save video capture filter device (and properties) to file", OFFSET(video_filter_save_file), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
1320 { NULL },
1321 };
1322
1323 static const AVClass dshow_class = {
1324 .class_name = "dshow indev",
1325 .item_name = av_default_item_name,
1326 .option = options,
1327 .version = LIBAVUTIL_VERSION_INT,
1328 .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
1329 };
1330
1331 AVInputFormat ff_dshow_demuxer = {
1332 .name = "dshow",
1333 .long_name = NULL_IF_CONFIG_SMALL("DirectShow capture"),
1334 .priv_data_size = sizeof(struct dshow_ctx),
1335 .read_header = dshow_read_header,
1336 .read_packet = dshow_read_packet,
1337 .read_close = dshow_read_close,
1338 .flags = AVFMT_NOFILE,
1339 .priv_class = &dshow_class,
1340 };
1341