2 * Directshow capture interface
3 * Copyright (c) 2010 Ramiro Polla
5 * This file is part of FFmpeg.
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.
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.
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
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"
29 #include "libavcodec/raw.h"
34 static enum AVPixelFormat dshow_pixfmt(DWORD biCompression, WORD biBitCount)
36 switch(biCompression) {
39 switch(biBitCount) { /* 1-8 are untested */
41 return AV_PIX_FMT_MONOWHITE;
43 return AV_PIX_FMT_RGB4;
45 return AV_PIX_FMT_RGB8;
47 return AV_PIX_FMT_RGB555;
49 return AV_PIX_FMT_BGR24;
51 return AV_PIX_FMT_0RGB32;
54 return avpriv_find_pix_fmt(avpriv_get_raw_pix_fmt_tags(), biCompression); // all others
58 dshow_read_close(AVFormatContext *s)
60 struct dshow_ctx *ctx = s->priv_data;
64 IMediaControl_Stop(ctx->control);
65 IMediaControl_Release(ctx->control);
69 IMediaEvent_Release(ctx->media_event);
74 r = IGraphBuilder_EnumFilters(ctx->graph, &fenum);
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);
84 IEnumFilters_Release(fenum);
86 IGraphBuilder_Release(ctx->graph);
89 if (ctx->capture_pin[VideoDevice])
90 libAVPin_Release(ctx->capture_pin[VideoDevice]);
91 if (ctx->capture_pin[AudioDevice])
92 libAVPin_Release(ctx->capture_pin[AudioDevice]);
93 if (ctx->capture_filter[VideoDevice])
94 libAVFilter_Release(ctx->capture_filter[VideoDevice]);
95 if (ctx->capture_filter[AudioDevice])
96 libAVFilter_Release(ctx->capture_filter[AudioDevice]);
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]);
107 if (ctx->device_name[0])
108 av_freep(&ctx->device_name[0]);
109 if (ctx->device_name[1])
110 av_freep(&ctx->device_name[1]);
113 CloseHandle(ctx->mutex);
115 CloseHandle(ctx->event[0]);
117 CloseHandle(ctx->event[1]);
121 AVPacketList *next = pktl->next;
122 av_free_packet(&pktl->pkt);
132 static char *dup_wchar_to_utf8(wchar_t *w)
135 int l = WideCharToMultiByte(CP_UTF8, 0, w, -1, 0, 0, 0, 0);
138 WideCharToMultiByte(CP_UTF8, 0, w, -1, s, l, 0, 0);
142 static int shall_we_drop(AVFormatContext *s, int index, enum dshowDeviceType devtype)
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";
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);
161 callback(void *priv_data, int index, uint8_t *buf, int buf_size, int64_t time, enum dshowDeviceType devtype)
163 AVFormatContext *s = priv_data;
164 struct dshow_ctx *ctx = s->priv_data;
165 AVPacketList **ppktl, *pktl_next;
167 // dump_videohdr(s, vdhdr);
169 WaitForSingleObject(ctx->mutex, INFINITE);
171 if(shall_we_drop(s, index, devtype))
174 pktl_next = av_mallocz(sizeof(AVPacketList));
178 if(av_new_packet(&pktl_next->pkt, buf_size) < 0) {
183 pktl_next->pkt.stream_index = index;
184 pktl_next->pkt.pts = time;
185 memcpy(pktl_next->pkt.data, buf, buf_size);
187 for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next);
189 ctx->curbufsize[index] += buf_size;
191 SetEvent(ctx->event[1]);
192 ReleaseMutex(ctx->mutex);
196 ReleaseMutex(ctx->mutex);
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.
207 dshow_cycle_devices(AVFormatContext *avctx, ICreateDevEnum *devenum,
208 enum dshowDeviceType devtype, enum dshowSourceFilterType sourcetype, IBaseFilter **pfilter)
210 struct dshow_ctx *ctx = avctx->priv_data;
211 IBaseFilter *device_filter = NULL;
212 IEnumMoniker *classenum = NULL;
214 const char *device_name = ctx->device_name[devtype];
215 int skip = (devtype == VideoDevice) ? ctx->video_device_number
216 : ctx->audio_device_number;
219 const GUID *device_guid[2] = { &CLSID_VideoInputDeviceCategory,
220 &CLSID_AudioInputDeviceCategory };
221 const char *devtypename = (devtype == VideoDevice) ? "video" : "audio only";
222 const char *sourcetypename = (sourcetype == VideoSourceDevice) ? "video" : "audio";
224 r = ICreateDevEnum_CreateClassEnumerator(devenum, device_guid[sourcetype],
225 (IEnumMoniker **) &classenum, 0);
227 av_log(avctx, AV_LOG_ERROR, "Could not enumerate %s devices (or none found).\n",
232 while (!device_filter && IEnumMoniker_Next(classenum, 1, &m, NULL) == S_OK) {
233 IPropertyBag *bag = NULL;
234 char *friendly_name = NULL;
235 char *unique_name = NULL;
237 IBindCtx *bind_ctx = NULL;
238 LPOLESTR olestr = NULL;
239 LPMALLOC co_malloc = NULL;
242 r = CoGetMalloc(1, &co_malloc);
245 r = CreateBindCtx(0, &bind_ctx);
248 /* GetDisplayname works for both video and audio, DevicePath doesn't */
249 r = IMoniker_GetDisplayName(m, bind_ctx, NULL, &olestr);
252 unique_name = dup_wchar_to_utf8(olestr);
253 /* replace ':' with '_' since we use : to delineate between sources */
254 for (i = 0; i < strlen(unique_name); i++) {
255 if (unique_name[i] == ':')
256 unique_name[i] = '_';
259 r = IMoniker_BindToStorage(m, 0, 0, &IID_IPropertyBag, (void *) &bag);
264 r = IPropertyBag_Read(bag, L"FriendlyName", &var, NULL);
267 friendly_name = dup_wchar_to_utf8(var.bstrVal);
270 if (strcmp(device_name, friendly_name) && strcmp(device_name, unique_name))
274 r = IMoniker_BindToObject(m, 0, 0, &IID_IBaseFilter, (void *) &device_filter);
276 av_log(avctx, AV_LOG_ERROR, "Unable to BindToObject for %s\n", device_name);
281 av_log(avctx, AV_LOG_INFO, " \"%s\"\n", friendly_name);
282 av_log(avctx, AV_LOG_INFO, " Alternative name \"%s\"\n", unique_name);
286 if (olestr && co_malloc)
287 IMalloc_Free(co_malloc, olestr);
289 IBindCtx_Release(bind_ctx);
290 av_free(friendly_name);
291 av_free(unique_name);
293 IPropertyBag_Release(bag);
297 IEnumMoniker_Release(classenum);
300 if (!device_filter) {
301 av_log(avctx, AV_LOG_ERROR, "Could not find %s device with name [%s] among source devices of type %s.\n",
302 devtypename, device_name, sourcetypename);
305 *pfilter = device_filter;
312 * Cycle through available formats using the specified pin,
313 * try to set parameters specified through AVOptions and if successful
314 * return 1 in *pformat_set.
315 * If pformat_set is NULL, list all pin capabilities.
318 dshow_cycle_formats(AVFormatContext *avctx, enum dshowDeviceType devtype,
319 IPin *pin, int *pformat_set)
321 struct dshow_ctx *ctx = avctx->priv_data;
322 IAMStreamConfig *config = NULL;
323 AM_MEDIA_TYPE *type = NULL;
328 if (IPin_QueryInterface(pin, &IID_IAMStreamConfig, (void **) &config) != S_OK)
330 if (IAMStreamConfig_GetNumberOfCapabilities(config, &n, &size) != S_OK)
333 caps = av_malloc(size);
337 for (i = 0; i < n && !format_set; i++) {
338 r = IAMStreamConfig_GetStreamCaps(config, i, &type, (void *) caps);
342 ff_print_AM_MEDIA_TYPE(type);
345 if (devtype == VideoDevice) {
346 VIDEO_STREAM_CONFIG_CAPS *vcaps = caps;
347 BITMAPINFOHEADER *bih;
349 const AVCodecTag *const tags[] = { avformat_get_riff_video_tags(), NULL };
351 ff_print_VIDEO_STREAM_CONFIG_CAPS(vcaps);
353 if (IsEqualGUID(&type->formattype, &FORMAT_VideoInfo)) {
354 VIDEOINFOHEADER *v = (void *) type->pbFormat;
355 fr = &v->AvgTimePerFrame;
357 } else if (IsEqualGUID(&type->formattype, &FORMAT_VideoInfo2)) {
358 VIDEOINFOHEADER2 *v = (void *) type->pbFormat;
359 fr = &v->AvgTimePerFrame;
365 enum AVPixelFormat pix_fmt = dshow_pixfmt(bih->biCompression, bih->biBitCount);
366 if (pix_fmt == AV_PIX_FMT_NONE) {
367 enum AVCodecID codec_id = av_codec_get_id(tags, bih->biCompression);
368 AVCodec *codec = avcodec_find_decoder(codec_id);
369 if (codec_id == AV_CODEC_ID_NONE || !codec) {
370 av_log(avctx, AV_LOG_INFO, " unknown compression type 0x%X", (int) bih->biCompression);
372 av_log(avctx, AV_LOG_INFO, " vcodec=%s", codec->name);
375 av_log(avctx, AV_LOG_INFO, " pixel_format=%s", av_get_pix_fmt_name(pix_fmt));
377 av_log(avctx, AV_LOG_INFO, " min s=%ldx%ld fps=%g max s=%ldx%ld fps=%g\n",
378 vcaps->MinOutputSize.cx, vcaps->MinOutputSize.cy,
379 1e7 / vcaps->MaxFrameInterval,
380 vcaps->MaxOutputSize.cx, vcaps->MaxOutputSize.cy,
381 1e7 / vcaps->MinFrameInterval);
384 if (ctx->video_codec_id != AV_CODEC_ID_RAWVIDEO) {
385 if (ctx->video_codec_id != av_codec_get_id(tags, bih->biCompression))
388 if (ctx->pixel_format != AV_PIX_FMT_NONE &&
389 ctx->pixel_format != dshow_pixfmt(bih->biCompression, bih->biBitCount)) {
392 if (ctx->framerate) {
393 int64_t framerate = ((int64_t) ctx->requested_framerate.den*10000000)
394 / ctx->requested_framerate.num;
395 if (framerate > vcaps->MaxFrameInterval ||
396 framerate < vcaps->MinFrameInterval)
400 if (ctx->requested_width && ctx->requested_height) {
401 if (ctx->requested_width > vcaps->MaxOutputSize.cx ||
402 ctx->requested_width < vcaps->MinOutputSize.cx ||
403 ctx->requested_height > vcaps->MaxOutputSize.cy ||
404 ctx->requested_height < vcaps->MinOutputSize.cy)
406 bih->biWidth = ctx->requested_width;
407 bih->biHeight = ctx->requested_height;
410 AUDIO_STREAM_CONFIG_CAPS *acaps = caps;
413 ff_print_AUDIO_STREAM_CONFIG_CAPS(acaps);
415 if (IsEqualGUID(&type->formattype, &FORMAT_WaveFormatEx)) {
416 fx = (void *) type->pbFormat;
421 av_log(avctx, AV_LOG_INFO, " min ch=%lu bits=%lu rate=%6lu max ch=%lu bits=%lu rate=%6lu\n",
422 acaps->MinimumChannels, acaps->MinimumBitsPerSample, acaps->MinimumSampleFrequency,
423 acaps->MaximumChannels, acaps->MaximumBitsPerSample, acaps->MaximumSampleFrequency);
426 if (ctx->sample_rate) {
427 if (ctx->sample_rate > acaps->MaximumSampleFrequency ||
428 ctx->sample_rate < acaps->MinimumSampleFrequency)
430 fx->nSamplesPerSec = ctx->sample_rate;
432 if (ctx->sample_size) {
433 if (ctx->sample_size > acaps->MaximumBitsPerSample ||
434 ctx->sample_size < acaps->MinimumBitsPerSample)
436 fx->wBitsPerSample = ctx->sample_size;
439 if (ctx->channels > acaps->MaximumChannels ||
440 ctx->channels < acaps->MinimumChannels)
442 fx->nChannels = ctx->channels;
445 if (IAMStreamConfig_SetFormat(config, type) != S_OK)
450 CoTaskMemFree(type->pbFormat);
454 IAMStreamConfig_Release(config);
457 *pformat_set = format_set;
461 * Set audio device buffer size in milliseconds (which can directly impact
462 * latency, depending on the device).
465 dshow_set_audio_buffer_size(AVFormatContext *avctx, IPin *pin)
467 struct dshow_ctx *ctx = avctx->priv_data;
468 IAMBufferNegotiation *buffer_negotiation = NULL;
469 ALLOCATOR_PROPERTIES props = { -1, -1, -1, -1 };
470 IAMStreamConfig *config = NULL;
471 AM_MEDIA_TYPE *type = NULL;
472 int ret = AVERROR(EIO);
474 if (IPin_QueryInterface(pin, &IID_IAMStreamConfig, (void **) &config) != S_OK)
476 if (IAMStreamConfig_GetFormat(config, &type) != S_OK)
478 if (!IsEqualGUID(&type->formattype, &FORMAT_WaveFormatEx))
481 props.cbBuffer = (((WAVEFORMATEX *) type->pbFormat)->nAvgBytesPerSec)
482 * ctx->audio_buffer_size / 1000;
484 if (IPin_QueryInterface(pin, &IID_IAMBufferNegotiation, (void **) &buffer_negotiation) != S_OK)
486 if (IAMBufferNegotiation_SuggestAllocatorProperties(buffer_negotiation, &props) != S_OK)
492 if (buffer_negotiation)
493 IAMBufferNegotiation_Release(buffer_negotiation);
496 CoTaskMemFree(type->pbFormat);
500 IAMStreamConfig_Release(config);
506 * Pops up a user dialog allowing them to adjust properties for the given filter, if possible.
509 dshow_show_filter_properties(IBaseFilter *device_filter, AVFormatContext *avctx) {
510 ISpecifyPropertyPages *property_pages = NULL;
511 IUnknown *device_filter_iunknown = NULL;
513 FILTER_INFO filter_info = {0}; /* a warning on this line is false positive GCC bug 53119 AFAICT */
514 CAUUID ca_guid = {0};
516 hr = IBaseFilter_QueryInterface(device_filter, &IID_ISpecifyPropertyPages, (void **)&property_pages);
518 av_log(avctx, AV_LOG_WARNING, "requested filter does not have a property page to show");
521 hr = IBaseFilter_QueryFilterInfo(device_filter, &filter_info);
525 hr = IBaseFilter_QueryInterface(device_filter, &IID_IUnknown, (void **)&device_filter_iunknown);
529 hr = ISpecifyPropertyPages_GetPages(property_pages, &ca_guid);
533 hr = OleCreatePropertyFrame(NULL, 0, 0, filter_info.achName, 1, &device_filter_iunknown, ca_guid.cElems,
534 ca_guid.pElems, 0, 0, NULL);
540 av_log(avctx, AV_LOG_ERROR, "Failure showing property pages for filter");
543 ISpecifyPropertyPages_Release(property_pages);
544 if (device_filter_iunknown)
545 IUnknown_Release(device_filter_iunknown);
546 if (filter_info.pGraph)
547 IFilterGraph_Release(filter_info.pGraph);
549 CoTaskMemFree(ca_guid.pElems);
553 * Cycle through available pins using the device_filter device, of type
554 * devtype, retrieve the first output pin and return the pointer to the
555 * object found in *ppin.
556 * If ppin is NULL, cycle through all pins listing audio/video capabilities.
559 dshow_cycle_pins(AVFormatContext *avctx, enum dshowDeviceType devtype,
560 enum dshowSourceFilterType sourcetype, IBaseFilter *device_filter, IPin **ppin)
562 struct dshow_ctx *ctx = avctx->priv_data;
564 IPin *device_pin = NULL;
568 const GUID *mediatype[2] = { &MEDIATYPE_Video, &MEDIATYPE_Audio };
569 const char *devtypename = (devtype == VideoDevice) ? "video" : "audio only";
570 const char *sourcetypename = (sourcetype == VideoSourceDevice) ? "video" : "audio";
572 int set_format = (devtype == VideoDevice && (ctx->framerate ||
573 (ctx->requested_width && ctx->requested_height) ||
574 ctx->pixel_format != AV_PIX_FMT_NONE ||
575 ctx->video_codec_id != AV_CODEC_ID_RAWVIDEO))
576 || (devtype == AudioDevice && (ctx->channels || ctx->sample_rate));
578 int should_show_properties = (devtype == VideoDevice) ? ctx->show_video_device_dialog : ctx->show_audio_device_dialog;
580 if (should_show_properties)
581 dshow_show_filter_properties(device_filter, avctx);
583 r = IBaseFilter_EnumPins(device_filter, &pins);
585 av_log(avctx, AV_LOG_ERROR, "Could not enumerate pins.\n");
590 av_log(avctx, AV_LOG_INFO, "DirectShow %s device options (from %s devices)\n",
591 devtypename, sourcetypename);
594 while (!device_pin && IEnumPins_Next(pins, 1, &pin, NULL) == S_OK) {
595 IKsPropertySet *p = NULL;
596 IEnumMediaTypes *types = NULL;
601 char *name_buf = NULL;
602 wchar_t *pin_id = NULL;
603 char *pin_buf = NULL;
604 char *desired_pin_name = devtype == VideoDevice ? ctx->video_pin_name : ctx->audio_pin_name;
606 IPin_QueryPinInfo(pin, &info);
607 IBaseFilter_Release(info.pFilter);
609 if (info.dir != PINDIR_OUTPUT)
611 if (IPin_QueryInterface(pin, &IID_IKsPropertySet, (void **) &p) != S_OK)
613 if (IKsPropertySet_Get(p, &ROPSETID_Pin, AMPROPERTY_PIN_CATEGORY,
614 NULL, 0, &category, sizeof(GUID), &r2) != S_OK)
616 if (!IsEqualGUID(&category, &PIN_CATEGORY_CAPTURE))
618 name_buf = dup_wchar_to_utf8(info.achName);
620 r = IPin_QueryId(pin, &pin_id);
622 av_log(avctx, AV_LOG_ERROR, "Could not query pin id\n");
625 pin_buf = dup_wchar_to_utf8(pin_id);
628 av_log(avctx, AV_LOG_INFO, " Pin \"%s\" (alternative pin name \"%s\")\n", name_buf, pin_buf);
629 dshow_cycle_formats(avctx, devtype, pin, NULL);
633 if (desired_pin_name) {
634 if(strcmp(name_buf, desired_pin_name) && strcmp(pin_buf, desired_pin_name)) {
635 av_log(avctx, AV_LOG_DEBUG, "skipping pin \"%s\" (\"%s\") != requested \"%s\"\n",
636 name_buf, pin_buf, desired_pin_name);
642 dshow_cycle_formats(avctx, devtype, pin, &format_set);
647 if (devtype == AudioDevice && ctx->audio_buffer_size) {
648 if (dshow_set_audio_buffer_size(avctx, pin) < 0) {
649 av_log(avctx, AV_LOG_ERROR, "unable to set audio buffer size %d to pin, using pin anyway...", ctx->audio_buffer_size);
653 if (IPin_EnumMediaTypes(pin, &types) != S_OK)
656 IEnumMediaTypes_Reset(types);
657 /* in case format_set was not called, just verify the majortype */
658 while (!device_pin && IEnumMediaTypes_Next(types, 1, &type, NULL) == S_OK) {
659 if (IsEqualGUID(&type->majortype, mediatype[devtype])) {
661 av_log(avctx, AV_LOG_DEBUG, "Selecting pin %s on %s\n", name_buf, devtypename);
669 IEnumMediaTypes_Release(types);
671 IKsPropertySet_Release(p);
672 if (device_pin != pin)
677 CoTaskMemFree(pin_id);
680 IEnumPins_Release(pins);
683 if (set_format && !format_set) {
684 av_log(avctx, AV_LOG_ERROR, "Could not set %s options\n", devtypename);
688 av_log(avctx, AV_LOG_ERROR,
689 "Could not find output pin from %s capture device.\n", devtypename);
699 * List options for device with type devtype, source filter type sourcetype
701 * @param devenum device enumerator used for accessing the device
704 dshow_list_device_options(AVFormatContext *avctx, ICreateDevEnum *devenum,
705 enum dshowDeviceType devtype, enum dshowSourceFilterType sourcetype)
707 struct dshow_ctx *ctx = avctx->priv_data;
708 IBaseFilter *device_filter = NULL;
711 if ((r = dshow_cycle_devices(avctx, devenum, devtype, sourcetype, &device_filter)) < 0)
713 ctx->device_filter[devtype] = device_filter;
714 if ((r = dshow_cycle_pins(avctx, devtype, sourcetype, device_filter, NULL)) < 0)
721 dshow_open_device(AVFormatContext *avctx, ICreateDevEnum *devenum,
722 enum dshowDeviceType devtype, enum dshowSourceFilterType sourcetype)
724 struct dshow_ctx *ctx = avctx->priv_data;
725 IBaseFilter *device_filter = NULL;
726 IGraphBuilder *graph = ctx->graph;
727 IPin *device_pin = NULL;
728 libAVPin *capture_pin = NULL;
729 libAVFilter *capture_filter = NULL;
730 ICaptureGraphBuilder2 *graph_builder2 = NULL;
731 int ret = AVERROR(EIO);
733 IStream *ifile_stream = NULL;
734 IStream *ofile_stream = NULL;
735 IPersistStream *pers_stream = NULL;
737 const wchar_t *filter_name[2] = { L"Audio capture filter", L"Video capture filter" };
740 if ( ((ctx->audio_filter_load_file) && (strlen(ctx->audio_filter_load_file)>0) && (sourcetype == AudioSourceDevice)) ||
741 ((ctx->video_filter_load_file) && (strlen(ctx->video_filter_load_file)>0) && (sourcetype == VideoSourceDevice)) ) {
743 char *filename = NULL;
745 if (sourcetype == AudioSourceDevice)
746 filename = ctx->audio_filter_load_file;
748 filename = ctx->video_filter_load_file;
750 hr = SHCreateStreamOnFile ((LPCSTR) filename, STGM_READ, &ifile_stream);
752 av_log(avctx, AV_LOG_ERROR, "Could not open capture filter description file.\n");
756 hr = OleLoadFromStream(ifile_stream, &IID_IBaseFilter, (void **) &device_filter);
758 av_log(avctx, AV_LOG_ERROR, "Could not load capture filter from file.\n");
762 if (sourcetype == AudioSourceDevice)
763 av_log(avctx, AV_LOG_INFO, "Audio-");
765 av_log(avctx, AV_LOG_INFO, "Video-");
766 av_log(avctx, AV_LOG_INFO, "Capture filter loaded successfully from file \"%s\".\n", filename);
769 if ((r = dshow_cycle_devices(avctx, devenum, devtype, sourcetype, &device_filter)) < 0) {
775 ctx->device_filter [devtype] = device_filter;
777 r = IGraphBuilder_AddFilter(graph, device_filter, NULL);
779 av_log(avctx, AV_LOG_ERROR, "Could not add device filter to graph.\n");
783 if ((r = dshow_cycle_pins(avctx, devtype, sourcetype, device_filter, &device_pin)) < 0) {
788 ctx->device_pin[devtype] = device_pin;
790 capture_filter = libAVFilter_Create(avctx, callback, devtype);
791 if (!capture_filter) {
792 av_log(avctx, AV_LOG_ERROR, "Could not create grabber filter.\n");
795 ctx->capture_filter[devtype] = capture_filter;
797 if ( ((ctx->audio_filter_save_file) && (strlen(ctx->audio_filter_save_file)>0) && (sourcetype == AudioSourceDevice)) ||
798 ((ctx->video_filter_save_file) && (strlen(ctx->video_filter_save_file)>0) && (sourcetype == VideoSourceDevice)) ) {
801 char *filename = NULL;
803 if (sourcetype == AudioSourceDevice)
804 filename = ctx->audio_filter_save_file;
806 filename = ctx->video_filter_save_file;
808 hr = SHCreateStreamOnFile ((LPCSTR) filename, STGM_CREATE | STGM_READWRITE, &ofile_stream);
810 av_log(avctx, AV_LOG_ERROR, "Could not create capture filter description file.\n");
814 hr = IBaseFilter_QueryInterface(device_filter, &IID_IPersistStream, (void **) &pers_stream);
816 av_log(avctx, AV_LOG_ERROR, "Query for IPersistStream failed.\n");
820 hr = OleSaveToStream(pers_stream, ofile_stream);
822 av_log(avctx, AV_LOG_ERROR, "Could not save capture filter \n");
826 hr = IStream_Commit(ofile_stream, STGC_DEFAULT);
828 av_log(avctx, AV_LOG_ERROR, "Could not commit capture filter data to file.\n");
832 if (sourcetype == AudioSourceDevice)
833 av_log(avctx, AV_LOG_INFO, "Audio-");
835 av_log(avctx, AV_LOG_INFO, "Video-");
836 av_log(avctx, AV_LOG_INFO, "Capture filter saved successfully to file \"%s\".\n", filename);
839 r = IGraphBuilder_AddFilter(graph, (IBaseFilter *) capture_filter,
840 filter_name[devtype]);
842 av_log(avctx, AV_LOG_ERROR, "Could not add capture filter to graph\n");
846 libAVPin_AddRef(capture_filter->pin);
847 capture_pin = capture_filter->pin;
848 ctx->capture_pin[devtype] = capture_pin;
850 r = CoCreateInstance(&CLSID_CaptureGraphBuilder2, NULL, CLSCTX_INPROC_SERVER,
851 &IID_ICaptureGraphBuilder2, (void **) &graph_builder2);
853 av_log(avctx, AV_LOG_ERROR, "Could not create CaptureGraphBuilder2\n");
856 ICaptureGraphBuilder2_SetFiltergraph(graph_builder2, graph);
858 av_log(avctx, AV_LOG_ERROR, "Could not set graph for CaptureGraphBuilder2\n");
862 r = ICaptureGraphBuilder2_RenderStream(graph_builder2, NULL, NULL, (IUnknown *) device_pin, NULL /* no intermediate filter */,
863 (IBaseFilter *) capture_filter); /* connect pins, optionally insert intermediate filters like crossbar if necessary */
866 av_log(avctx, AV_LOG_ERROR, "Could not RenderStream to connect pins\n");
870 r = dshow_try_setup_crossbar_options(graph_builder2, device_filter, devtype, avctx);
873 av_log(avctx, AV_LOG_ERROR, "Could not setup CrossBar\n");
880 if (graph_builder2 != NULL)
881 ICaptureGraphBuilder2_Release(graph_builder2);
884 IPersistStream_Release(pers_stream);
887 IStream_Release(ifile_stream);
890 IStream_Release(ofile_stream);
895 static enum AVCodecID waveform_codec_id(enum AVSampleFormat sample_fmt)
897 switch (sample_fmt) {
898 case AV_SAMPLE_FMT_U8: return AV_CODEC_ID_PCM_U8;
899 case AV_SAMPLE_FMT_S16: return AV_CODEC_ID_PCM_S16LE;
900 case AV_SAMPLE_FMT_S32: return AV_CODEC_ID_PCM_S32LE;
901 default: return AV_CODEC_ID_NONE; /* Should never happen. */
905 static enum AVSampleFormat sample_fmt_bits_per_sample(int bits)
908 case 8: return AV_SAMPLE_FMT_U8;
909 case 16: return AV_SAMPLE_FMT_S16;
910 case 32: return AV_SAMPLE_FMT_S32;
911 default: return AV_SAMPLE_FMT_NONE; /* Should never happen. */
916 dshow_add_device(AVFormatContext *avctx,
917 enum dshowDeviceType devtype)
919 struct dshow_ctx *ctx = avctx->priv_data;
921 AVCodecContext *codec;
923 int ret = AVERROR(EIO);
925 st = avformat_new_stream(avctx, NULL);
927 ret = AVERROR(ENOMEM);
932 ctx->capture_filter[devtype]->stream_index = st->index;
934 libAVPin_ConnectionMediaType(ctx->capture_pin[devtype], &type);
937 if (devtype == VideoDevice) {
938 BITMAPINFOHEADER *bih = NULL;
939 AVRational time_base;
941 if (IsEqualGUID(&type.formattype, &FORMAT_VideoInfo)) {
942 VIDEOINFOHEADER *v = (void *) type.pbFormat;
943 time_base = (AVRational) { v->AvgTimePerFrame, 10000000 };
945 } else if (IsEqualGUID(&type.formattype, &FORMAT_VideoInfo2)) {
946 VIDEOINFOHEADER2 *v = (void *) type.pbFormat;
947 time_base = (AVRational) { v->AvgTimePerFrame, 10000000 };
951 av_log(avctx, AV_LOG_ERROR, "Could not get media type.\n");
955 codec->time_base = time_base;
956 codec->codec_type = AVMEDIA_TYPE_VIDEO;
957 codec->width = bih->biWidth;
958 codec->height = bih->biHeight;
959 codec->codec_tag = bih->biCompression;
960 codec->pix_fmt = dshow_pixfmt(bih->biCompression, bih->biBitCount);
961 if (bih->biCompression == MKTAG('H', 'D', 'Y', 'C')) {
962 av_log(avctx, AV_LOG_DEBUG, "attempt to use full range for HDYC...\n");
963 codec->color_range = AVCOL_RANGE_MPEG; // just in case it needs this...
965 if (codec->pix_fmt == AV_PIX_FMT_NONE) {
966 const AVCodecTag *const tags[] = { avformat_get_riff_video_tags(), NULL };
967 codec->codec_id = av_codec_get_id(tags, bih->biCompression);
968 if (codec->codec_id == AV_CODEC_ID_NONE) {
969 av_log(avctx, AV_LOG_ERROR, "Unknown compression type. "
970 "Please report type 0x%X.\n", (int) bih->biCompression);
971 return AVERROR_PATCHWELCOME;
973 codec->bits_per_coded_sample = bih->biBitCount;
975 codec->codec_id = AV_CODEC_ID_RAWVIDEO;
976 if (bih->biCompression == BI_RGB || bih->biCompression == BI_BITFIELDS) {
977 codec->bits_per_coded_sample = bih->biBitCount;
978 codec->extradata = av_malloc(9 + FF_INPUT_BUFFER_PADDING_SIZE);
979 if (codec->extradata) {
980 codec->extradata_size = 9;
981 memcpy(codec->extradata, "BottomUp", 9);
986 WAVEFORMATEX *fx = NULL;
988 if (IsEqualGUID(&type.formattype, &FORMAT_WaveFormatEx)) {
989 fx = (void *) type.pbFormat;
992 av_log(avctx, AV_LOG_ERROR, "Could not get media type.\n");
996 codec->codec_type = AVMEDIA_TYPE_AUDIO;
997 codec->sample_fmt = sample_fmt_bits_per_sample(fx->wBitsPerSample);
998 codec->codec_id = waveform_codec_id(codec->sample_fmt);
999 codec->sample_rate = fx->nSamplesPerSec;
1000 codec->channels = fx->nChannels;
1003 avpriv_set_pts_info(st, 64, 1, 10000000);
1011 static int parse_device_name(AVFormatContext *avctx)
1013 struct dshow_ctx *ctx = avctx->priv_data;
1014 char **device_name = ctx->device_name;
1015 char *name = av_strdup(avctx->filename);
1020 while ((type = strtok(tmp, "="))) {
1021 char *token = strtok(NULL, ":");
1024 if (!strcmp(type, "video")) {
1025 device_name[0] = token;
1026 } else if (!strcmp(type, "audio")) {
1027 device_name[1] = token;
1029 device_name[0] = NULL;
1030 device_name[1] = NULL;
1035 if (!device_name[0] && !device_name[1]) {
1039 device_name[0] = av_strdup(device_name[0]);
1041 device_name[1] = av_strdup(device_name[1]);
1048 static int dshow_read_header(AVFormatContext *avctx)
1050 struct dshow_ctx *ctx = avctx->priv_data;
1051 IGraphBuilder *graph = NULL;
1052 ICreateDevEnum *devenum = NULL;
1053 IMediaControl *control = NULL;
1054 IMediaEvent *media_event = NULL;
1055 HANDLE media_event_handle;
1057 int ret = AVERROR(EIO);
1062 if (!ctx->list_devices && !parse_device_name(avctx)) {
1063 av_log(avctx, AV_LOG_ERROR, "Malformed dshow input string.\n");
1067 ctx->video_codec_id = avctx->video_codec_id ? avctx->video_codec_id
1068 : AV_CODEC_ID_RAWVIDEO;
1069 if (ctx->pixel_format != AV_PIX_FMT_NONE) {
1070 if (ctx->video_codec_id != AV_CODEC_ID_RAWVIDEO) {
1071 av_log(avctx, AV_LOG_ERROR, "Pixel format may only be set when "
1072 "video codec is not set or set to rawvideo\n");
1073 ret = AVERROR(EINVAL);
1077 if (ctx->framerate) {
1078 r = av_parse_video_rate(&ctx->requested_framerate, ctx->framerate);
1080 av_log(avctx, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", ctx->framerate);
1085 r = CoCreateInstance(&CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER,
1086 &IID_IGraphBuilder, (void **) &graph);
1088 av_log(avctx, AV_LOG_ERROR, "Could not create capture graph.\n");
1093 r = CoCreateInstance(&CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER,
1094 &IID_ICreateDevEnum, (void **) &devenum);
1096 av_log(avctx, AV_LOG_ERROR, "Could not enumerate system devices.\n");
1100 if (ctx->list_devices) {
1101 av_log(avctx, AV_LOG_INFO, "DirectShow video devices (some may be both video and audio devices)\n");
1102 dshow_cycle_devices(avctx, devenum, VideoDevice, VideoSourceDevice, NULL);
1103 av_log(avctx, AV_LOG_INFO, "DirectShow audio devices\n");
1104 dshow_cycle_devices(avctx, devenum, AudioDevice, AudioSourceDevice, NULL);
1108 if (ctx->list_options) {
1109 if (ctx->device_name[VideoDevice])
1110 if ((r = dshow_list_device_options(avctx, devenum, VideoDevice, VideoSourceDevice))) {
1114 if (ctx->device_name[AudioDevice]) {
1115 if (dshow_list_device_options(avctx, devenum, AudioDevice, AudioSourceDevice)) {
1116 /* show audio options from combined video+audio sources as fallback */
1117 if ((r = dshow_list_device_options(avctx, devenum, AudioDevice, VideoSourceDevice))) {
1124 if (ctx->device_name[VideoDevice]) {
1125 if ((r = dshow_open_device(avctx, devenum, VideoDevice, VideoSourceDevice)) < 0 ||
1126 (r = dshow_add_device(avctx, VideoDevice)) < 0) {
1131 if (ctx->device_name[AudioDevice]) {
1132 if ((r = dshow_open_device(avctx, devenum, AudioDevice, AudioSourceDevice)) < 0 ||
1133 (r = dshow_add_device(avctx, AudioDevice)) < 0) {
1134 av_log(avctx, AV_LOG_INFO, "Searching for audio device within video devices for %s\n", ctx->device_name[AudioDevice]);
1135 /* see if there's a video source with an audio pin with the given audio name */
1136 if ((r = dshow_open_device(avctx, devenum, AudioDevice, VideoSourceDevice)) < 0 ||
1137 (r = dshow_add_device(avctx, AudioDevice)) < 0) {
1143 if (ctx->list_options) {
1144 /* allow it to list crossbar options in dshow_open_device */
1148 ctx->curbufsize[0] = 0;
1149 ctx->curbufsize[1] = 0;
1150 ctx->mutex = CreateMutex(NULL, 0, NULL);
1152 av_log(avctx, AV_LOG_ERROR, "Could not create Mutex\n");
1155 ctx->event[1] = CreateEvent(NULL, 1, 0, NULL);
1156 if (!ctx->event[1]) {
1157 av_log(avctx, AV_LOG_ERROR, "Could not create Event\n");
1161 r = IGraphBuilder_QueryInterface(graph, &IID_IMediaControl, (void **) &control);
1163 av_log(avctx, AV_LOG_ERROR, "Could not get media control.\n");
1166 ctx->control = control;
1168 r = IGraphBuilder_QueryInterface(graph, &IID_IMediaEvent, (void **) &media_event);
1170 av_log(avctx, AV_LOG_ERROR, "Could not get media event.\n");
1173 ctx->media_event = media_event;
1175 r = IMediaEvent_GetEventHandle(media_event, (void *) &media_event_handle);
1177 av_log(avctx, AV_LOG_ERROR, "Could not get media event handle.\n");
1180 proc = GetCurrentProcess();
1181 r = DuplicateHandle(proc, media_event_handle, proc, &ctx->event[0],
1182 0, 0, DUPLICATE_SAME_ACCESS);
1184 av_log(avctx, AV_LOG_ERROR, "Could not duplicate media event handle.\n");
1188 r = IMediaControl_Run(control);
1191 r = IMediaControl_GetState(control, 0, &pfs);
1194 av_log(avctx, AV_LOG_ERROR, "Could not run graph (sometimes caused by a device already in use by other application)\n");
1203 ICreateDevEnum_Release(devenum);
1206 dshow_read_close(avctx);
1212 * Checks media events from DirectShow and returns -1 on error or EOF. Also
1213 * purges all events that might be in the event queue to stop the trigger
1214 * of event notification.
1216 static int dshow_check_event_queue(IMediaEvent *media_event)
1222 while (IMediaEvent_GetEvent(media_event, &code, &p1, &p2, 0) != E_ABORT) {
1223 if (code == EC_COMPLETE || code == EC_DEVICE_LOST || code == EC_ERRORABORT)
1225 IMediaEvent_FreeEventParams(media_event, code, p1, p2);
1231 static int dshow_read_packet(AVFormatContext *s, AVPacket *pkt)
1233 struct dshow_ctx *ctx = s->priv_data;
1234 AVPacketList *pktl = NULL;
1236 while (!ctx->eof && !pktl) {
1237 WaitForSingleObject(ctx->mutex, INFINITE);
1241 ctx->pktl = ctx->pktl->next;
1243 ctx->curbufsize[pkt->stream_index] -= pkt->size;
1245 ResetEvent(ctx->event[1]);
1246 ReleaseMutex(ctx->mutex);
1248 if (dshow_check_event_queue(ctx->media_event) < 0) {
1250 } else if (s->flags & AVFMT_FLAG_NONBLOCK) {
1251 return AVERROR(EAGAIN);
1253 WaitForMultipleObjects(2, ctx->event, 0, INFINITE);
1258 return ctx->eof ? AVERROR(EIO) : pkt->size;
1261 #define OFFSET(x) offsetof(struct dshow_ctx, x)
1262 #define DEC AV_OPT_FLAG_DECODING_PARAM
1263 static const AVOption options[] = {
1264 { "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 },
1265 { "pixel_format", "set video pixel format", OFFSET(pixel_format), AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_NONE}, -1, INT_MAX, DEC },
1266 { "framerate", "set video frame rate", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
1267 { "sample_rate", "set audio sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC },
1268 { "sample_size", "set audio sample size", OFFSET(sample_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 16, DEC },
1269 { "channels", "set number of audio channels, such as 1 or 2", OFFSET(channels), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC },
1270 { "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 },
1271 { "list_devices", "list available devices", OFFSET(list_devices), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, DEC, "list_devices" },
1272 { "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, DEC, "list_devices" },
1273 { "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, DEC, "list_devices" },
1274 { "list_options", "list available options for specified device", OFFSET(list_options), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, DEC, "list_options" },
1275 { "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, DEC, "list_options" },
1276 { "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, DEC, "list_options" },
1277 { "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 },
1278 { "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 },
1279 { "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 },
1280 { "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 },
1281 { "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 },
1282 { "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 },
1283 { "show_video_device_dialog", "display property dialog for video capture device", OFFSET(show_video_device_dialog), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DEC, "show_video_device_dialog" },
1284 { "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, DEC, "show_video_device_dialog" },
1285 { "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, DEC, "show_video_device_dialog" },
1286 { "show_audio_device_dialog", "display property dialog for audio capture device", OFFSET(show_audio_device_dialog), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DEC, "show_audio_device_dialog" },
1287 { "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, DEC, "show_audio_device_dialog" },
1288 { "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, DEC, "show_audio_device_dialog" },
1289 { "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_INT, {.i64 = 0}, 0, 1, DEC, "show_video_crossbar_connection_dialog" },
1290 { "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, DEC, "show_video_crossbar_connection_dialog" },
1291 { "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, DEC, "show_video_crossbar_connection_dialog" },
1292 { "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_INT, {.i64 = 0}, 0, 1, DEC, "show_audio_crossbar_connection_dialog" },
1293 { "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, DEC, "show_audio_crossbar_connection_dialog" },
1294 { "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, DEC, "show_audio_crossbar_connection_dialog" },
1295 { "show_analog_tv_tuner_dialog", "display property dialog for analog tuner filter", OFFSET(show_analog_tv_tuner_dialog), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DEC, "show_analog_tv_tuner_dialog" },
1296 { "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, DEC, "show_analog_tv_tuner_dialog" },
1297 { "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, DEC, "show_analog_tv_tuner_dialog" },
1298 { "show_analog_tv_tuner_audio_dialog", "display property dialog for analog tuner audio filter", OFFSET(show_analog_tv_tuner_audio_dialog), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DEC, "show_analog_tv_tuner_dialog" },
1299 { "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, DEC, "show_analog_tv_tuner_audio_dialog" },
1300 { "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, DEC, "show_analog_tv_tuner_audio_dialog" },
1301 { "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 },
1302 { "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 },
1303 { "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 },
1304 { "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 },
1308 static const AVClass dshow_class = {
1309 .class_name = "dshow indev",
1310 .item_name = av_default_item_name,
1312 .version = LIBAVUTIL_VERSION_INT,
1313 .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
1316 AVInputFormat ff_dshow_demuxer = {
1318 .long_name = NULL_IF_CONFIG_SMALL("DirectShow capture"),
1319 .priv_data_size = sizeof(struct dshow_ctx),
1320 .read_header = dshow_read_header,
1321 .read_packet = dshow_read_packet,
1322 .read_close = dshow_read_close,
1323 .flags = AVFMT_NOFILE,
1324 .priv_class = &dshow_class,