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"
37 int video_device_number;
38 int audio_device_number;
42 int audio_buffer_size;
44 IBaseFilter *device_filter[2];
46 libAVFilter *capture_filter[2];
47 libAVPin *capture_pin[2];
50 HANDLE event[2]; /* event[0] is set by DirectShow
51 * event[1] is set by callback() */
56 int64_t curbufsize[2];
57 unsigned int video_frame_num;
59 IMediaControl *control;
60 IMediaEvent *media_event;
62 enum AVPixelFormat pixel_format;
63 enum AVCodecID video_codec_id;
68 AVRational requested_framerate;
75 static enum AVPixelFormat dshow_pixfmt(DWORD biCompression, WORD biBitCount)
77 switch(biCompression) {
80 switch(biBitCount) { /* 1-8 are untested */
82 return AV_PIX_FMT_MONOWHITE;
84 return AV_PIX_FMT_RGB4;
86 return AV_PIX_FMT_RGB8;
88 return AV_PIX_FMT_RGB555;
90 return AV_PIX_FMT_BGR24;
92 return AV_PIX_FMT_0RGB32;
95 return avpriv_find_pix_fmt(avpriv_get_raw_pix_fmt_tags(), biCompression); // all others
99 dshow_read_close(AVFormatContext *s)
101 struct dshow_ctx *ctx = s->priv_data;
105 IMediaControl_Stop(ctx->control);
106 IMediaControl_Release(ctx->control);
109 if (ctx->media_event)
110 IMediaEvent_Release(ctx->media_event);
115 r = IGraphBuilder_EnumFilters(ctx->graph, &fenum);
118 IEnumFilters_Reset(fenum);
119 while (IEnumFilters_Next(fenum, 1, &f, NULL) == S_OK) {
120 if (IGraphBuilder_RemoveFilter(ctx->graph, f) == S_OK)
121 IEnumFilters_Reset(fenum); /* When a filter is removed,
122 * the list must be reset. */
123 IBaseFilter_Release(f);
125 IEnumFilters_Release(fenum);
127 IGraphBuilder_Release(ctx->graph);
130 if (ctx->capture_pin[VideoDevice])
131 libAVPin_Release(ctx->capture_pin[VideoDevice]);
132 if (ctx->capture_pin[AudioDevice])
133 libAVPin_Release(ctx->capture_pin[AudioDevice]);
134 if (ctx->capture_filter[VideoDevice])
135 libAVFilter_Release(ctx->capture_filter[VideoDevice]);
136 if (ctx->capture_filter[AudioDevice])
137 libAVFilter_Release(ctx->capture_filter[AudioDevice]);
139 if (ctx->device_pin[VideoDevice])
140 IPin_Release(ctx->device_pin[VideoDevice]);
141 if (ctx->device_pin[AudioDevice])
142 IPin_Release(ctx->device_pin[AudioDevice]);
143 if (ctx->device_filter[VideoDevice])
144 IBaseFilter_Release(ctx->device_filter[VideoDevice]);
145 if (ctx->device_filter[AudioDevice])
146 IBaseFilter_Release(ctx->device_filter[AudioDevice]);
148 if (ctx->device_name[0])
149 av_free(ctx->device_name[0]);
150 if (ctx->device_name[1])
151 av_free(ctx->device_name[1]);
154 CloseHandle(ctx->mutex);
156 CloseHandle(ctx->event[0]);
158 CloseHandle(ctx->event[1]);
162 AVPacketList *next = pktl->next;
163 av_destruct_packet(&pktl->pkt);
173 static char *dup_wchar_to_utf8(wchar_t *w)
176 int l = WideCharToMultiByte(CP_UTF8, 0, w, -1, 0, 0, 0, 0);
179 WideCharToMultiByte(CP_UTF8, 0, w, -1, s, l, 0, 0);
183 static int shall_we_drop(AVFormatContext *s, int index, enum dshowDeviceType devtype)
185 struct dshow_ctx *ctx = s->priv_data;
186 static const uint8_t dropscore[] = {62, 75, 87, 100};
187 const int ndropscores = FF_ARRAY_ELEMS(dropscore);
188 unsigned int buffer_fullness = (ctx->curbufsize[index]*100)/s->max_picture_buffer;
190 if(dropscore[++ctx->video_frame_num%ndropscores] <= buffer_fullness) {
191 av_log(s, AV_LOG_ERROR,
192 "real-time buffer[%s] too full (%d%% of size: %d)! frame dropped!\n", ctx->device_name[devtype], buffer_fullness, s->max_picture_buffer);
200 callback(void *priv_data, int index, uint8_t *buf, int buf_size, int64_t time, enum dshowDeviceType devtype)
202 AVFormatContext *s = priv_data;
203 struct dshow_ctx *ctx = s->priv_data;
204 AVPacketList **ppktl, *pktl_next;
206 // dump_videohdr(s, vdhdr);
208 WaitForSingleObject(ctx->mutex, INFINITE);
210 if(shall_we_drop(s, index, devtype))
213 pktl_next = av_mallocz(sizeof(AVPacketList));
217 if(av_new_packet(&pktl_next->pkt, buf_size) < 0) {
222 pktl_next->pkt.stream_index = index;
223 pktl_next->pkt.pts = time;
224 memcpy(pktl_next->pkt.data, buf, buf_size);
226 for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next);
228 ctx->curbufsize[index] += buf_size;
230 SetEvent(ctx->event[1]);
231 ReleaseMutex(ctx->mutex);
235 ReleaseMutex(ctx->mutex);
240 * Cycle through available devices using the device enumerator devenum,
241 * retrieve the device with type specified by devtype and return the
242 * pointer to the object found in *pfilter.
243 * If pfilter is NULL, list all device names.
246 dshow_cycle_devices(AVFormatContext *avctx, ICreateDevEnum *devenum,
247 enum dshowDeviceType devtype, IBaseFilter **pfilter)
249 struct dshow_ctx *ctx = avctx->priv_data;
250 IBaseFilter *device_filter = NULL;
251 IEnumMoniker *classenum = NULL;
253 const char *device_name = ctx->device_name[devtype];
254 int skip = (devtype == VideoDevice) ? ctx->video_device_number
255 : ctx->audio_device_number;
258 const GUID *device_guid[2] = { &CLSID_VideoInputDeviceCategory,
259 &CLSID_AudioInputDeviceCategory };
260 const char *devtypename = (devtype == VideoDevice) ? "video" : "audio";
262 r = ICreateDevEnum_CreateClassEnumerator(devenum, device_guid[devtype],
263 (IEnumMoniker **) &classenum, 0);
265 av_log(avctx, AV_LOG_ERROR, "Could not enumerate %s devices.\n",
270 while (!device_filter && IEnumMoniker_Next(classenum, 1, &m, NULL) == S_OK) {
271 IPropertyBag *bag = NULL;
275 r = IMoniker_BindToStorage(m, 0, 0, &IID_IPropertyBag, (void *) &bag);
280 r = IPropertyBag_Read(bag, L"FriendlyName", &var, NULL);
284 buf = dup_wchar_to_utf8(var.bstrVal);
287 if (strcmp(device_name, buf))
291 IMoniker_BindToObject(m, 0, 0, &IID_IBaseFilter, (void *) &device_filter);
293 av_log(avctx, AV_LOG_INFO, " \"%s\"\n", buf);
300 IPropertyBag_Release(bag);
304 IEnumMoniker_Release(classenum);
307 if (!device_filter) {
308 av_log(avctx, AV_LOG_ERROR, "Could not find %s device.\n",
312 *pfilter = device_filter;
319 * Cycle through available formats using the specified pin,
320 * try to set parameters specified through AVOptions and if successful
321 * return 1 in *pformat_set.
322 * If pformat_set is NULL, list all pin capabilities.
325 dshow_cycle_formats(AVFormatContext *avctx, enum dshowDeviceType devtype,
326 IPin *pin, int *pformat_set)
328 struct dshow_ctx *ctx = avctx->priv_data;
329 IAMStreamConfig *config = NULL;
330 AM_MEDIA_TYPE *type = NULL;
335 if (IPin_QueryInterface(pin, &IID_IAMStreamConfig, (void **) &config) != S_OK)
337 if (IAMStreamConfig_GetNumberOfCapabilities(config, &n, &size) != S_OK)
340 caps = av_malloc(size);
344 for (i = 0; i < n && !format_set; i++) {
345 IAMStreamConfig_GetStreamCaps(config, i, &type, (void *) caps);
348 ff_print_AM_MEDIA_TYPE(type);
351 if (devtype == VideoDevice) {
352 VIDEO_STREAM_CONFIG_CAPS *vcaps = caps;
353 BITMAPINFOHEADER *bih;
355 const AVCodecTag *const tags[] = { avformat_get_riff_video_tags(), NULL };
357 ff_print_VIDEO_STREAM_CONFIG_CAPS(vcaps);
359 if (IsEqualGUID(&type->formattype, &FORMAT_VideoInfo)) {
360 VIDEOINFOHEADER *v = (void *) type->pbFormat;
361 fr = &v->AvgTimePerFrame;
363 } else if (IsEqualGUID(&type->formattype, &FORMAT_VideoInfo2)) {
364 VIDEOINFOHEADER2 *v = (void *) type->pbFormat;
365 fr = &v->AvgTimePerFrame;
371 enum AVPixelFormat pix_fmt = dshow_pixfmt(bih->biCompression, bih->biBitCount);
372 if (pix_fmt == AV_PIX_FMT_NONE) {
373 enum AVCodecID codec_id = av_codec_get_id(tags, bih->biCompression);
374 AVCodec *codec = avcodec_find_decoder(codec_id);
375 if (codec_id == AV_CODEC_ID_NONE || !codec) {
376 av_log(avctx, AV_LOG_INFO, " unknown compression type 0x%X", (int) bih->biCompression);
378 av_log(avctx, AV_LOG_INFO, " vcodec=%s", codec->name);
381 av_log(avctx, AV_LOG_INFO, " pixel_format=%s", av_get_pix_fmt_name(pix_fmt));
383 av_log(avctx, AV_LOG_INFO, " min s=%ldx%ld fps=%g max s=%ldx%ld fps=%g\n",
384 vcaps->MinOutputSize.cx, vcaps->MinOutputSize.cy,
385 1e7 / vcaps->MaxFrameInterval,
386 vcaps->MaxOutputSize.cx, vcaps->MaxOutputSize.cy,
387 1e7 / vcaps->MinFrameInterval);
390 if (ctx->video_codec_id != AV_CODEC_ID_RAWVIDEO) {
391 if (ctx->video_codec_id != av_codec_get_id(tags, bih->biCompression))
394 if (ctx->pixel_format != AV_PIX_FMT_NONE &&
395 ctx->pixel_format != dshow_pixfmt(bih->biCompression, bih->biBitCount)) {
398 if (ctx->framerate) {
399 int64_t framerate = ((int64_t) ctx->requested_framerate.den*10000000)
400 / ctx->requested_framerate.num;
401 if (framerate > vcaps->MaxFrameInterval ||
402 framerate < vcaps->MinFrameInterval)
406 if (ctx->requested_width && ctx->requested_height) {
407 if (ctx->requested_width > vcaps->MaxOutputSize.cx ||
408 ctx->requested_width < vcaps->MinOutputSize.cx ||
409 ctx->requested_height > vcaps->MaxOutputSize.cy ||
410 ctx->requested_height < vcaps->MinOutputSize.cy)
412 bih->biWidth = ctx->requested_width;
413 bih->biHeight = ctx->requested_height;
416 AUDIO_STREAM_CONFIG_CAPS *acaps = caps;
419 ff_print_AUDIO_STREAM_CONFIG_CAPS(acaps);
421 if (IsEqualGUID(&type->formattype, &FORMAT_WaveFormatEx)) {
422 fx = (void *) type->pbFormat;
427 av_log(avctx, AV_LOG_INFO, " min ch=%lu bits=%lu rate=%6lu max ch=%lu bits=%lu rate=%6lu\n",
428 acaps->MinimumChannels, acaps->MinimumBitsPerSample, acaps->MinimumSampleFrequency,
429 acaps->MaximumChannels, acaps->MaximumBitsPerSample, acaps->MaximumSampleFrequency);
432 if (ctx->sample_rate) {
433 if (ctx->sample_rate > acaps->MaximumSampleFrequency ||
434 ctx->sample_rate < acaps->MinimumSampleFrequency)
436 fx->nSamplesPerSec = ctx->sample_rate;
438 if (ctx->sample_size) {
439 if (ctx->sample_size > acaps->MaximumBitsPerSample ||
440 ctx->sample_size < acaps->MinimumBitsPerSample)
442 fx->wBitsPerSample = ctx->sample_size;
445 if (ctx->channels > acaps->MaximumChannels ||
446 ctx->channels < acaps->MinimumChannels)
448 fx->nChannels = ctx->channels;
451 if (IAMStreamConfig_SetFormat(config, type) != S_OK)
456 CoTaskMemFree(type->pbFormat);
460 IAMStreamConfig_Release(config);
464 *pformat_set = format_set;
468 * Set audio device buffer size in milliseconds (which can directly impact
469 * latency, depending on the device).
472 dshow_set_audio_buffer_size(AVFormatContext *avctx, IPin *pin)
474 struct dshow_ctx *ctx = avctx->priv_data;
475 IAMBufferNegotiation *buffer_negotiation = NULL;
476 ALLOCATOR_PROPERTIES props = { -1, -1, -1, -1 };
477 IAMStreamConfig *config = NULL;
478 AM_MEDIA_TYPE *type = NULL;
479 int ret = AVERROR(EIO);
481 if (IPin_QueryInterface(pin, &IID_IAMStreamConfig, (void **) &config) != S_OK)
483 if (IAMStreamConfig_GetFormat(config, &type) != S_OK)
485 if (!IsEqualGUID(&type->formattype, &FORMAT_WaveFormatEx))
488 props.cbBuffer = (((WAVEFORMATEX *) type->pbFormat)->nAvgBytesPerSec)
489 * ctx->audio_buffer_size / 1000;
491 if (IPin_QueryInterface(pin, &IID_IAMBufferNegotiation, (void **) &buffer_negotiation) != S_OK)
493 if (IAMBufferNegotiation_SuggestAllocatorProperties(buffer_negotiation, &props) != S_OK)
499 if (buffer_negotiation)
500 IAMBufferNegotiation_Release(buffer_negotiation);
503 CoTaskMemFree(type->pbFormat);
507 IAMStreamConfig_Release(config);
513 * Cycle through available pins using the device_filter device, of type
514 * devtype, retrieve the first output pin and return the pointer to the
515 * object found in *ppin.
516 * If ppin is NULL, cycle through all pins listing audio/video capabilities.
519 dshow_cycle_pins(AVFormatContext *avctx, enum dshowDeviceType devtype,
520 IBaseFilter *device_filter, IPin **ppin)
522 struct dshow_ctx *ctx = avctx->priv_data;
524 IPin *device_pin = NULL;
528 const GUID *mediatype[2] = { &MEDIATYPE_Video, &MEDIATYPE_Audio };
529 const char *devtypename = (devtype == VideoDevice) ? "video" : "audio";
531 int set_format = (devtype == VideoDevice && (ctx->framerate ||
532 (ctx->requested_width && ctx->requested_height) ||
533 ctx->pixel_format != AV_PIX_FMT_NONE ||
534 ctx->video_codec_id != AV_CODEC_ID_RAWVIDEO))
535 || (devtype == AudioDevice && (ctx->channels || ctx->sample_rate));
538 r = IBaseFilter_EnumPins(device_filter, &pins);
540 av_log(avctx, AV_LOG_ERROR, "Could not enumerate pins.\n");
545 av_log(avctx, AV_LOG_INFO, "DirectShow %s device options\n",
548 while (!device_pin && IEnumPins_Next(pins, 1, &pin, NULL) == S_OK) {
549 IKsPropertySet *p = NULL;
550 IEnumMediaTypes *types = NULL;
556 IPin_QueryPinInfo(pin, &info);
557 IBaseFilter_Release(info.pFilter);
559 if (info.dir != PINDIR_OUTPUT)
561 if (IPin_QueryInterface(pin, &IID_IKsPropertySet, (void **) &p) != S_OK)
563 if (IKsPropertySet_Get(p, &ROPSETID_Pin, AMPROPERTY_PIN_CATEGORY,
564 NULL, 0, &category, sizeof(GUID), &r2) != S_OK)
566 if (!IsEqualGUID(&category, &PIN_CATEGORY_CAPTURE))
570 char *buf = dup_wchar_to_utf8(info.achName);
571 av_log(avctx, AV_LOG_INFO, " Pin \"%s\"\n", buf);
573 dshow_cycle_formats(avctx, devtype, pin, NULL);
577 dshow_cycle_formats(avctx, devtype, pin, &format_set);
582 if (devtype == AudioDevice && ctx->audio_buffer_size) {
583 if (dshow_set_audio_buffer_size(avctx, pin) < 0) {
584 av_log(avctx, AV_LOG_ERROR, "unable to set audio buffer size %d to pin, using pin anyway...", ctx->audio_buffer_size);
588 if (IPin_EnumMediaTypes(pin, &types) != S_OK)
591 IEnumMediaTypes_Reset(types);
592 while (!device_pin && IEnumMediaTypes_Next(types, 1, &type, NULL) == S_OK) {
593 if (IsEqualGUID(&type->majortype, mediatype[devtype])) {
602 IEnumMediaTypes_Release(types);
604 IKsPropertySet_Release(p);
605 if (device_pin != pin)
609 IEnumPins_Release(pins);
612 if (set_format && !format_set) {
613 av_log(avctx, AV_LOG_ERROR, "Could not set %s options\n", devtypename);
617 av_log(avctx, AV_LOG_ERROR,
618 "Could not find output pin from %s capture device.\n", devtypename);
628 * List options for device with type devtype.
630 * @param devenum device enumerator used for accessing the device
633 dshow_list_device_options(AVFormatContext *avctx, ICreateDevEnum *devenum,
634 enum dshowDeviceType devtype)
636 struct dshow_ctx *ctx = avctx->priv_data;
637 IBaseFilter *device_filter = NULL;
640 if ((r = dshow_cycle_devices(avctx, devenum, devtype, &device_filter)) < 0)
642 ctx->device_filter[devtype] = device_filter;
643 if ((r = dshow_cycle_pins(avctx, devtype, device_filter, NULL)) < 0)
650 dshow_open_device(AVFormatContext *avctx, ICreateDevEnum *devenum,
651 enum dshowDeviceType devtype)
653 struct dshow_ctx *ctx = avctx->priv_data;
654 IBaseFilter *device_filter = NULL;
655 IGraphBuilder *graph = ctx->graph;
656 IPin *device_pin = NULL;
657 libAVPin *capture_pin = NULL;
658 libAVFilter *capture_filter = NULL;
659 int ret = AVERROR(EIO);
662 const wchar_t *filter_name[2] = { L"Audio capture filter", L"Video capture filter" };
664 if ((r = dshow_cycle_devices(avctx, devenum, devtype, &device_filter)) < 0) {
669 ctx->device_filter [devtype] = device_filter;
671 r = IGraphBuilder_AddFilter(graph, device_filter, NULL);
673 av_log(avctx, AV_LOG_ERROR, "Could not add device filter to graph.\n");
677 if ((r = dshow_cycle_pins(avctx, devtype, device_filter, &device_pin)) < 0) {
681 ctx->device_pin[devtype] = device_pin;
683 capture_filter = libAVFilter_Create(avctx, callback, devtype);
684 if (!capture_filter) {
685 av_log(avctx, AV_LOG_ERROR, "Could not create grabber filter.\n");
688 ctx->capture_filter[devtype] = capture_filter;
690 r = IGraphBuilder_AddFilter(graph, (IBaseFilter *) capture_filter,
691 filter_name[devtype]);
693 av_log(avctx, AV_LOG_ERROR, "Could not add capture filter to graph\n");
697 libAVPin_AddRef(capture_filter->pin);
698 capture_pin = capture_filter->pin;
699 ctx->capture_pin[devtype] = capture_pin;
701 r = IGraphBuilder_ConnectDirect(graph, device_pin, (IPin *) capture_pin, NULL);
703 av_log(avctx, AV_LOG_ERROR, "Could not connect pins\n");
713 static enum AVCodecID waveform_codec_id(enum AVSampleFormat sample_fmt)
715 switch (sample_fmt) {
716 case AV_SAMPLE_FMT_U8: return AV_CODEC_ID_PCM_U8;
717 case AV_SAMPLE_FMT_S16: return AV_CODEC_ID_PCM_S16LE;
718 case AV_SAMPLE_FMT_S32: return AV_CODEC_ID_PCM_S32LE;
719 default: return AV_CODEC_ID_NONE; /* Should never happen. */
723 static enum AVSampleFormat sample_fmt_bits_per_sample(int bits)
726 case 8: return AV_SAMPLE_FMT_U8;
727 case 16: return AV_SAMPLE_FMT_S16;
728 case 32: return AV_SAMPLE_FMT_S32;
729 default: return AV_SAMPLE_FMT_NONE; /* Should never happen. */
734 dshow_add_device(AVFormatContext *avctx,
735 enum dshowDeviceType devtype)
737 struct dshow_ctx *ctx = avctx->priv_data;
739 AVCodecContext *codec;
741 int ret = AVERROR(EIO);
743 st = avformat_new_stream(avctx, NULL);
745 ret = AVERROR(ENOMEM);
750 ctx->capture_filter[devtype]->stream_index = st->index;
752 libAVPin_ConnectionMediaType(ctx->capture_pin[devtype], &type);
755 if (devtype == VideoDevice) {
756 BITMAPINFOHEADER *bih = NULL;
757 AVRational time_base;
759 if (IsEqualGUID(&type.formattype, &FORMAT_VideoInfo)) {
760 VIDEOINFOHEADER *v = (void *) type.pbFormat;
761 time_base = (AVRational) { v->AvgTimePerFrame, 10000000 };
763 } else if (IsEqualGUID(&type.formattype, &FORMAT_VideoInfo2)) {
764 VIDEOINFOHEADER2 *v = (void *) type.pbFormat;
765 time_base = (AVRational) { v->AvgTimePerFrame, 10000000 };
769 av_log(avctx, AV_LOG_ERROR, "Could not get media type.\n");
773 codec->time_base = time_base;
774 codec->codec_type = AVMEDIA_TYPE_VIDEO;
775 codec->width = bih->biWidth;
776 codec->height = bih->biHeight;
777 codec->codec_tag = bih->biCompression;
778 codec->pix_fmt = dshow_pixfmt(bih->biCompression, bih->biBitCount);
779 if (bih->biCompression == MKTAG('H', 'D', 'Y', 'C')) {
780 av_log(avctx, AV_LOG_DEBUG, "attempt to use full range for HDYC...\n");
781 codec->color_range = AVCOL_RANGE_MPEG; // just in case it needs this...
783 if (codec->pix_fmt == AV_PIX_FMT_NONE) {
784 const AVCodecTag *const tags[] = { avformat_get_riff_video_tags(), NULL };
785 codec->codec_id = av_codec_get_id(tags, bih->biCompression);
786 if (codec->codec_id == AV_CODEC_ID_NONE) {
787 av_log(avctx, AV_LOG_ERROR, "Unknown compression type. "
788 "Please report type 0x%X.\n", (int) bih->biCompression);
789 return AVERROR_PATCHWELCOME;
791 codec->bits_per_coded_sample = bih->biBitCount;
793 codec->codec_id = AV_CODEC_ID_RAWVIDEO;
794 if (bih->biCompression == BI_RGB || bih->biCompression == BI_BITFIELDS) {
795 codec->bits_per_coded_sample = bih->biBitCount;
796 codec->extradata = av_malloc(9 + FF_INPUT_BUFFER_PADDING_SIZE);
797 if (codec->extradata) {
798 codec->extradata_size = 9;
799 memcpy(codec->extradata, "BottomUp", 9);
804 WAVEFORMATEX *fx = NULL;
806 if (IsEqualGUID(&type.formattype, &FORMAT_WaveFormatEx)) {
807 fx = (void *) type.pbFormat;
810 av_log(avctx, AV_LOG_ERROR, "Could not get media type.\n");
814 codec->codec_type = AVMEDIA_TYPE_AUDIO;
815 codec->sample_fmt = sample_fmt_bits_per_sample(fx->wBitsPerSample);
816 codec->codec_id = waveform_codec_id(codec->sample_fmt);
817 codec->sample_rate = fx->nSamplesPerSec;
818 codec->channels = fx->nChannels;
821 avpriv_set_pts_info(st, 64, 1, 10000000);
829 static int parse_device_name(AVFormatContext *avctx)
831 struct dshow_ctx *ctx = avctx->priv_data;
832 char **device_name = ctx->device_name;
833 char *name = av_strdup(avctx->filename);
838 while ((type = strtok(tmp, "="))) {
839 char *token = strtok(NULL, ":");
842 if (!strcmp(type, "video")) {
843 device_name[0] = token;
844 } else if (!strcmp(type, "audio")) {
845 device_name[1] = token;
847 device_name[0] = NULL;
848 device_name[1] = NULL;
853 if (!device_name[0] && !device_name[1]) {
857 device_name[0] = av_strdup(device_name[0]);
859 device_name[1] = av_strdup(device_name[1]);
866 static int dshow_read_header(AVFormatContext *avctx)
868 struct dshow_ctx *ctx = avctx->priv_data;
869 IGraphBuilder *graph = NULL;
870 ICreateDevEnum *devenum = NULL;
871 IMediaControl *control = NULL;
872 IMediaEvent *media_event = NULL;
873 HANDLE media_event_handle;
875 int ret = AVERROR(EIO);
880 if (!ctx->list_devices && !parse_device_name(avctx)) {
881 av_log(avctx, AV_LOG_ERROR, "Malformed dshow input string.\n");
885 ctx->video_codec_id = avctx->video_codec_id ? avctx->video_codec_id
886 : AV_CODEC_ID_RAWVIDEO;
887 if (ctx->pixel_format != AV_PIX_FMT_NONE) {
888 if (ctx->video_codec_id != AV_CODEC_ID_RAWVIDEO) {
889 av_log(avctx, AV_LOG_ERROR, "Pixel format may only be set when "
890 "video codec is not set or set to rawvideo\n");
891 ret = AVERROR(EINVAL);
895 if (ctx->framerate) {
896 r = av_parse_video_rate(&ctx->requested_framerate, ctx->framerate);
898 av_log(avctx, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", ctx->framerate);
903 r = CoCreateInstance(&CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER,
904 &IID_IGraphBuilder, (void **) &graph);
906 av_log(avctx, AV_LOG_ERROR, "Could not create capture graph.\n");
911 r = CoCreateInstance(&CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER,
912 &IID_ICreateDevEnum, (void **) &devenum);
914 av_log(avctx, AV_LOG_ERROR, "Could not enumerate system devices.\n");
918 if (ctx->list_devices) {
919 av_log(avctx, AV_LOG_INFO, "DirectShow video devices\n");
920 dshow_cycle_devices(avctx, devenum, VideoDevice, NULL);
921 av_log(avctx, AV_LOG_INFO, "DirectShow audio devices\n");
922 dshow_cycle_devices(avctx, devenum, AudioDevice, NULL);
926 if (ctx->list_options) {
927 if (ctx->device_name[VideoDevice])
928 dshow_list_device_options(avctx, devenum, VideoDevice);
929 if (ctx->device_name[AudioDevice])
930 dshow_list_device_options(avctx, devenum, AudioDevice);
935 if (ctx->device_name[VideoDevice]) {
936 if ((r = dshow_open_device(avctx, devenum, VideoDevice)) < 0 ||
937 (r = dshow_add_device(avctx, VideoDevice)) < 0) {
942 if (ctx->device_name[AudioDevice]) {
943 if ((r = dshow_open_device(avctx, devenum, AudioDevice)) < 0 ||
944 (r = dshow_add_device(avctx, AudioDevice)) < 0) {
949 ctx->curbufsize[0] = 0;
950 ctx->curbufsize[1] = 0;
951 ctx->mutex = CreateMutex(NULL, 0, NULL);
953 av_log(avctx, AV_LOG_ERROR, "Could not create Mutex\n");
956 ctx->event[1] = CreateEvent(NULL, 1, 0, NULL);
957 if (!ctx->event[1]) {
958 av_log(avctx, AV_LOG_ERROR, "Could not create Event\n");
962 r = IGraphBuilder_QueryInterface(graph, &IID_IMediaControl, (void **) &control);
964 av_log(avctx, AV_LOG_ERROR, "Could not get media control.\n");
967 ctx->control = control;
969 r = IGraphBuilder_QueryInterface(graph, &IID_IMediaEvent, (void **) &media_event);
971 av_log(avctx, AV_LOG_ERROR, "Could not get media event.\n");
974 ctx->media_event = media_event;
976 r = IMediaEvent_GetEventHandle(media_event, (void *) &media_event_handle);
978 av_log(avctx, AV_LOG_ERROR, "Could not get media event handle.\n");
981 proc = GetCurrentProcess();
982 r = DuplicateHandle(proc, media_event_handle, proc, &ctx->event[0],
983 0, 0, DUPLICATE_SAME_ACCESS);
985 av_log(avctx, AV_LOG_ERROR, "Could not duplicate media event handle.\n");
989 r = IMediaControl_Run(control);
992 r = IMediaControl_GetState(control, 0, &pfs);
995 av_log(avctx, AV_LOG_ERROR, "Could not run filter\n");
1004 ICreateDevEnum_Release(devenum);
1007 dshow_read_close(avctx);
1013 * Checks media events from DirectShow and returns -1 on error or EOF. Also
1014 * purges all events that might be in the event queue to stop the trigger
1015 * of event notification.
1017 static int dshow_check_event_queue(IMediaEvent *media_event)
1023 while (IMediaEvent_GetEvent(media_event, &code, &p1, &p2, 0) != E_ABORT) {
1024 if (code == EC_COMPLETE || code == EC_DEVICE_LOST || code == EC_ERRORABORT)
1026 IMediaEvent_FreeEventParams(media_event, code, p1, p2);
1032 static int dshow_read_packet(AVFormatContext *s, AVPacket *pkt)
1034 struct dshow_ctx *ctx = s->priv_data;
1035 AVPacketList *pktl = NULL;
1037 while (!ctx->eof && !pktl) {
1038 WaitForSingleObject(ctx->mutex, INFINITE);
1042 ctx->pktl = ctx->pktl->next;
1044 ctx->curbufsize[pkt->stream_index] -= pkt->size;
1046 ResetEvent(ctx->event[1]);
1047 ReleaseMutex(ctx->mutex);
1049 if (dshow_check_event_queue(ctx->media_event) < 0) {
1051 } else if (s->flags & AVFMT_FLAG_NONBLOCK) {
1052 return AVERROR(EAGAIN);
1054 WaitForMultipleObjects(2, ctx->event, 0, INFINITE);
1059 return ctx->eof ? AVERROR(EIO) : pkt->size;
1062 #define OFFSET(x) offsetof(struct dshow_ctx, x)
1063 #define DEC AV_OPT_FLAG_DECODING_PARAM
1064 static const AVOption options[] = {
1065 { "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 },
1066 { "pixel_format", "set video pixel format", OFFSET(pixel_format), AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_NONE}, -1, INT_MAX, DEC },
1067 { "framerate", "set video frame rate", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
1068 { "sample_rate", "set audio sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC },
1069 { "sample_size", "set audio sample size", OFFSET(sample_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 16, DEC },
1070 { "channels", "set number of audio channels, such as 1 or 2", OFFSET(channels), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC },
1071 { "list_devices", "list available devices", OFFSET(list_devices), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, DEC, "list_devices" },
1072 { "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, DEC, "list_devices" },
1073 { "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, DEC, "list_devices" },
1074 { "list_options", "list available options for specified device", OFFSET(list_options), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, DEC, "list_options" },
1075 { "true", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, DEC, "list_options" },
1076 { "false", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, DEC, "list_options" },
1077 { "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 },
1078 { "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 },
1079 { "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 },
1083 static const AVClass dshow_class = {
1084 .class_name = "dshow indev",
1085 .item_name = av_default_item_name,
1087 .version = LIBAVUTIL_VERSION_INT,
1088 .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
1091 AVInputFormat ff_dshow_demuxer = {
1093 .long_name = NULL_IF_CONFIG_SMALL("DirectShow capture"),
1094 .priv_data_size = sizeof(struct dshow_ctx),
1095 .read_header = dshow_read_header,
1096 .read_packet = dshow_read_packet,
1097 .read_close = dshow_read_close,
1098 .flags = AVFMT_NOFILE,
1099 .priv_class = &dshow_class,