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-rw-r--r--libavdevice/dshow.c960
1 files changed, 960 insertions, 0 deletions
diff --git a/libavdevice/dshow.c b/libavdevice/dshow.c
new file mode 100644
index 0000000..a9d400c
--- /dev/null
+++ b/libavdevice/dshow.c
@@ -0,0 +1,960 @@
+/*
+ * Directshow capture interface
+ * Copyright (c) 2010 Ramiro Polla
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/parseutils.h"
+#include "libavutil/opt.h"
+
+#include "avdevice.h"
+#include "dshow.h"
+
+struct dshow_ctx {
+ const AVClass *class;
+
+ IGraphBuilder *graph;
+
+ char *device_name[2];
+
+ int list_options;
+ int list_devices;
+
+ IBaseFilter *device_filter[2];
+ IPin *device_pin[2];
+ libAVFilter *capture_filter[2];
+ libAVPin *capture_pin[2];
+
+ HANDLE mutex;
+ HANDLE event;
+ AVPacketList *pktl;
+
+ unsigned int curbufsize;
+ unsigned int video_frame_num;
+
+ IMediaControl *control;
+
+ char *video_size;
+ char *framerate;
+
+ int requested_width;
+ int requested_height;
+ AVRational requested_framerate;
+
+ int sample_rate;
+ int sample_size;
+ int channels;
+};
+
+static enum PixelFormat dshow_pixfmt(DWORD biCompression, WORD biBitCount)
+{
+ switch(biCompression) {
+ case MKTAG('U', 'Y', 'V', 'Y'):
+ return PIX_FMT_UYVY422;
+ case MKTAG('Y', 'U', 'Y', '2'):
+ return PIX_FMT_YUYV422;
+ case MKTAG('I', '4', '2', '0'):
+ return PIX_FMT_YUV420P;
+ case BI_RGB:
+ switch(biBitCount) { /* 1-8 are untested */
+ case 1:
+ return PIX_FMT_MONOWHITE;
+ case 4:
+ return PIX_FMT_RGB4;
+ case 8:
+ return PIX_FMT_RGB8;
+ case 16:
+ return PIX_FMT_RGB555;
+ case 24:
+ return PIX_FMT_BGR24;
+ case 32:
+ return PIX_FMT_RGB32;
+ }
+ }
+ return PIX_FMT_NONE;
+}
+
+static enum CodecID dshow_codecid(DWORD biCompression)
+{
+ switch(biCompression) {
+ case MKTAG('d', 'v', 's', 'd'):
+ return CODEC_ID_DVVIDEO;
+ case MKTAG('M', 'J', 'P', 'G'):
+ case MKTAG('m', 'j', 'p', 'g'):
+ return CODEC_ID_MJPEG;
+ }
+ return CODEC_ID_NONE;
+}
+
+static int
+dshow_read_close(AVFormatContext *s)
+{
+ struct dshow_ctx *ctx = s->priv_data;
+ AVPacketList *pktl;
+
+ if (ctx->control) {
+ IMediaControl_Stop(ctx->control);
+ IMediaControl_Release(ctx->control);
+ }
+
+ if (ctx->graph) {
+ IEnumFilters *fenum;
+ int r;
+ r = IGraphBuilder_EnumFilters(ctx->graph, &fenum);
+ if (r == S_OK) {
+ IBaseFilter *f;
+ IEnumFilters_Reset(fenum);
+ while (IEnumFilters_Next(fenum, 1, &f, NULL) == S_OK)
+ if (IGraphBuilder_RemoveFilter(ctx->graph, f) == S_OK)
+ IEnumFilters_Reset(fenum); /* When a filter is removed,
+ * the list must be reset. */
+ IEnumFilters_Release(fenum);
+ }
+ IGraphBuilder_Release(ctx->graph);
+ }
+
+ if (ctx->capture_pin[VideoDevice])
+ libAVPin_Release(ctx->capture_pin[VideoDevice]);
+ if (ctx->capture_pin[AudioDevice])
+ libAVPin_Release(ctx->capture_pin[AudioDevice]);
+ if (ctx->capture_filter[VideoDevice])
+ libAVFilter_Release(ctx->capture_filter[VideoDevice]);
+ if (ctx->capture_filter[AudioDevice])
+ libAVFilter_Release(ctx->capture_filter[AudioDevice]);
+
+ if (ctx->device_pin[VideoDevice])
+ IPin_Release(ctx->device_pin[VideoDevice]);
+ if (ctx->device_pin[AudioDevice])
+ IPin_Release(ctx->device_pin[AudioDevice]);
+ if (ctx->device_filter[VideoDevice])
+ IBaseFilter_Release(ctx->device_filter[VideoDevice]);
+ if (ctx->device_filter[AudioDevice])
+ IBaseFilter_Release(ctx->device_filter[AudioDevice]);
+
+ if (ctx->device_name[0])
+ av_free(ctx->device_name[0]);
+ if (ctx->device_name[1])
+ av_free(ctx->device_name[1]);
+
+ if(ctx->mutex)
+ CloseHandle(ctx->mutex);
+ if(ctx->event)
+ CloseHandle(ctx->event);
+
+ pktl = ctx->pktl;
+ while (pktl) {
+ AVPacketList *next = pktl->next;
+ av_destruct_packet(&pktl->pkt);
+ av_free(pktl);
+ pktl = next;
+ }
+
+ return 0;
+}
+
+static char *dup_wchar_to_utf8(wchar_t *w)
+{
+ char *s = NULL;
+ int l = WideCharToMultiByte(CP_UTF8, 0, w, -1, 0, 0, 0, 0);
+ s = av_malloc(l);
+ if (s)
+ WideCharToMultiByte(CP_UTF8, 0, w, -1, s, l, 0, 0);
+ return s;
+}
+
+static int shall_we_drop(AVFormatContext *s)
+{
+ struct dshow_ctx *ctx = s->priv_data;
+ const uint8_t dropscore[] = {62, 75, 87, 100};
+ const int ndropscores = FF_ARRAY_ELEMS(dropscore);
+ unsigned int buffer_fullness = (ctx->curbufsize*100)/s->max_picture_buffer;
+
+ if(dropscore[++ctx->video_frame_num%ndropscores] <= buffer_fullness) {
+ av_log(s, AV_LOG_ERROR,
+ "real-time buffer %d%% full! frame dropped!\n", buffer_fullness);
+ return 1;
+ }
+
+ return 0;
+}
+
+static void
+callback(void *priv_data, int index, uint8_t *buf, int buf_size, int64_t time)
+{
+ AVFormatContext *s = priv_data;
+ struct dshow_ctx *ctx = s->priv_data;
+ AVPacketList **ppktl, *pktl_next;
+
+// dump_videohdr(s, vdhdr);
+
+ if(shall_we_drop(s))
+ return;
+
+ WaitForSingleObject(ctx->mutex, INFINITE);
+
+ pktl_next = av_mallocz(sizeof(AVPacketList));
+ if(!pktl_next)
+ goto fail;
+
+ if(av_new_packet(&pktl_next->pkt, buf_size) < 0) {
+ av_free(pktl_next);
+ goto fail;
+ }
+
+ pktl_next->pkt.stream_index = index;
+ pktl_next->pkt.pts = time;
+ memcpy(pktl_next->pkt.data, buf, buf_size);
+
+ for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next);
+ *ppktl = pktl_next;
+
+ ctx->curbufsize += buf_size;
+
+ SetEvent(ctx->event);
+ ReleaseMutex(ctx->mutex);
+
+ return;
+fail:
+ ReleaseMutex(ctx->mutex);
+ return;
+}
+
+/**
+ * Cycle through available devices using the device enumerator devenum,
+ * retrieve the device with type specified by devtype and return the
+ * pointer to the object found in *pfilter.
+ * If pfilter is NULL, list all device names.
+ */
+static int
+dshow_cycle_devices(AVFormatContext *avctx, ICreateDevEnum *devenum,
+ enum dshowDeviceType devtype, IBaseFilter **pfilter)
+{
+ struct dshow_ctx *ctx = avctx->priv_data;
+ IBaseFilter *device_filter = NULL;
+ IEnumMoniker *classenum = NULL;
+ IMoniker *m = NULL;
+ const char *device_name = ctx->device_name[devtype];
+ int r;
+
+ const GUID *device_guid[2] = { &CLSID_VideoInputDeviceCategory,
+ &CLSID_AudioInputDeviceCategory };
+ const char *devtypename = (devtype == VideoDevice) ? "video" : "audio";
+
+ r = ICreateDevEnum_CreateClassEnumerator(devenum, device_guid[devtype],
+ (IEnumMoniker **) &classenum, 0);
+ if (r != S_OK) {
+ av_log(avctx, AV_LOG_ERROR, "Could not enumerate %s devices.\n",
+ devtypename);
+ return AVERROR(EIO);
+ }
+
+ while (!device_filter && IEnumMoniker_Next(classenum, 1, &m, NULL) == S_OK) {
+ IPropertyBag *bag = NULL;
+ char *buf = NULL;
+ VARIANT var;
+
+ r = IMoniker_BindToStorage(m, 0, 0, &IID_IPropertyBag, (void *) &bag);
+ if (r != S_OK)
+ goto fail1;
+
+ var.vt = VT_BSTR;
+ r = IPropertyBag_Read(bag, L"FriendlyName", &var, NULL);
+ if (r != S_OK)
+ goto fail1;
+
+ buf = dup_wchar_to_utf8(var.bstrVal);
+
+ if (pfilter) {
+ if (strcmp(device_name, buf))
+ goto fail1;
+
+ IMoniker_BindToObject(m, 0, 0, &IID_IBaseFilter, (void *) &device_filter);
+ } else {
+ av_log(avctx, AV_LOG_INFO, " \"%s\"\n", buf);
+ }
+
+fail1:
+ if (buf)
+ av_free(buf);
+ if (bag)
+ IPropertyBag_Release(bag);
+ IMoniker_Release(m);
+ }
+
+ IEnumMoniker_Release(classenum);
+
+ if (pfilter) {
+ if (!device_filter) {
+ av_log(avctx, AV_LOG_ERROR, "Could not find %s device.\n",
+ devtypename);
+ return AVERROR(EIO);
+ }
+ *pfilter = device_filter;
+ }
+
+ return 0;
+}
+
+/**
+ * Cycle through available formats using the specified pin,
+ * try to set parameters specified through AVOptions and if successful
+ * return 1 in *pformat_set.
+ * If pformat_set is NULL, list all pin capabilities.
+ */
+static void
+dshow_cycle_formats(AVFormatContext *avctx, enum dshowDeviceType devtype,
+ IPin *pin, int *pformat_set)
+{
+ struct dshow_ctx *ctx = avctx->priv_data;
+ IAMStreamConfig *config = NULL;
+ AM_MEDIA_TYPE *type = NULL;
+ int format_set = 0;
+ void *caps = NULL;
+ int i, n, size;
+
+ if (IPin_QueryInterface(pin, &IID_IAMStreamConfig, (void **) &config) != S_OK)
+ return;
+ if (IAMStreamConfig_GetNumberOfCapabilities(config, &n, &size) != S_OK)
+ goto end;
+
+ caps = av_malloc(size);
+ if (!caps)
+ goto end;
+
+ for (i = 0; i < n && !format_set; i++) {
+ IAMStreamConfig_GetStreamCaps(config, i, &type, (void *) caps);
+
+#if DSHOWDEBUG
+ ff_print_AM_MEDIA_TYPE(type);
+#endif
+
+ if (devtype == VideoDevice) {
+ VIDEO_STREAM_CONFIG_CAPS *vcaps = caps;
+ BITMAPINFOHEADER *bih;
+ int64_t *fr;
+#if DSHOWDEBUG
+ ff_print_VIDEO_STREAM_CONFIG_CAPS(vcaps);
+#endif
+ if (IsEqualGUID(&type->formattype, &FORMAT_VideoInfo)) {
+ VIDEOINFOHEADER *v = (void *) type->pbFormat;
+ fr = &v->AvgTimePerFrame;
+ bih = &v->bmiHeader;
+ } else if (IsEqualGUID(&type->formattype, &FORMAT_VideoInfo2)) {
+ VIDEOINFOHEADER2 *v = (void *) type->pbFormat;
+ fr = &v->AvgTimePerFrame;
+ bih = &v->bmiHeader;
+ } else {
+ goto next;
+ }
+ if (!pformat_set) {
+ av_log(avctx, AV_LOG_INFO, " min s=%ldx%ld fps=%g max s=%ldx%ld fps=%g\n",
+ vcaps->MinOutputSize.cx, vcaps->MinOutputSize.cy,
+ 1e7 / vcaps->MinFrameInterval,
+ vcaps->MaxOutputSize.cx, vcaps->MaxOutputSize.cy,
+ 1e7 / vcaps->MaxFrameInterval);
+ continue;
+ }
+ if (ctx->framerate) {
+ int64_t framerate = ((int64_t) ctx->requested_framerate.den*10000000)
+ / ctx->requested_framerate.num;
+ if (framerate > vcaps->MaxFrameInterval ||
+ framerate < vcaps->MinFrameInterval)
+ goto next;
+ *fr = framerate;
+ }
+ if (ctx->video_size) {
+ if (ctx->requested_width > vcaps->MaxOutputSize.cx ||
+ ctx->requested_width < vcaps->MinOutputSize.cx ||
+ ctx->requested_height > vcaps->MaxOutputSize.cy ||
+ ctx->requested_height < vcaps->MinOutputSize.cy)
+ goto next;
+ bih->biWidth = ctx->requested_width;
+ bih->biHeight = ctx->requested_height;
+ }
+ } else {
+ AUDIO_STREAM_CONFIG_CAPS *acaps = caps;
+ WAVEFORMATEX *fx;
+#if DSHOWDEBUG
+ ff_print_AUDIO_STREAM_CONFIG_CAPS(acaps);
+#endif
+ if (IsEqualGUID(&type->formattype, &FORMAT_WaveFormatEx)) {
+ fx = (void *) type->pbFormat;
+ } else {
+ goto next;
+ }
+ if (!pformat_set) {
+ av_log(avctx, AV_LOG_INFO, " min ch=%lu bits=%lu rate=%6lu max ch=%lu bits=%lu rate=%6lu\n",
+ acaps->MinimumChannels, acaps->MinimumBitsPerSample, acaps->MinimumSampleFrequency,
+ acaps->MaximumChannels, acaps->MaximumBitsPerSample, acaps->MaximumSampleFrequency);
+ continue;
+ }
+ if (ctx->sample_rate) {
+ if (ctx->sample_rate > acaps->MaximumSampleFrequency ||
+ ctx->sample_rate < acaps->MinimumSampleFrequency)
+ goto next;
+ fx->nSamplesPerSec = ctx->sample_rate;
+ }
+ if (ctx->sample_size) {
+ if (ctx->sample_size > acaps->MaximumBitsPerSample ||
+ ctx->sample_size < acaps->MinimumBitsPerSample)
+ goto next;
+ fx->wBitsPerSample = ctx->sample_size;
+ }
+ if (ctx->channels) {
+ if (ctx->channels > acaps->MaximumChannels ||
+ ctx->channels < acaps->MinimumChannels)
+ goto next;
+ fx->nChannels = ctx->channels;
+ }
+ }
+ if (IAMStreamConfig_SetFormat(config, type) != S_OK)
+ goto next;
+ format_set = 1;
+next:
+ if (type->pbFormat)
+ CoTaskMemFree(type->pbFormat);
+ CoTaskMemFree(type);
+ }
+end:
+ IAMStreamConfig_Release(config);
+ if (caps)
+ av_free(caps);
+ if (pformat_set)
+ *pformat_set = format_set;
+}
+
+/**
+ * Cycle through available pins using the device_filter device, of type
+ * devtype, retrieve the first output pin and return the pointer to the
+ * object found in *ppin.
+ * If ppin is NULL, cycle through all pins listing audio/video capabilities.
+ */
+static int
+dshow_cycle_pins(AVFormatContext *avctx, enum dshowDeviceType devtype,
+ IBaseFilter *device_filter, IPin **ppin)
+{
+ struct dshow_ctx *ctx = avctx->priv_data;
+ IEnumPins *pins = 0;
+ IPin *device_pin = NULL;
+ IPin *pin;
+ int r;
+
+ const GUID *mediatype[2] = { &MEDIATYPE_Video, &MEDIATYPE_Audio };
+ const char *devtypename = (devtype == VideoDevice) ? "video" : "audio";
+
+ int set_format = (devtype == VideoDevice && (ctx->video_size || ctx->framerate))
+ || (devtype == AudioDevice && (ctx->channels || ctx->sample_rate));
+ int format_set = 0;
+
+ r = IBaseFilter_EnumPins(device_filter, &pins);
+ if (r != S_OK) {
+ av_log(avctx, AV_LOG_ERROR, "Could not enumerate pins.\n");
+ return AVERROR(EIO);
+ }
+
+ if (!ppin) {
+ av_log(avctx, AV_LOG_INFO, "DirectShow %s device options\n",
+ devtypename);
+ }
+ while (!device_pin && IEnumPins_Next(pins, 1, &pin, NULL) == S_OK) {
+ IKsPropertySet *p = NULL;
+ IEnumMediaTypes *types = NULL;
+ PIN_INFO info = {0};
+ AM_MEDIA_TYPE *type;
+ GUID category;
+ DWORD r2;
+
+ IPin_QueryPinInfo(pin, &info);
+ IBaseFilter_Release(info.pFilter);
+
+ if (info.dir != PINDIR_OUTPUT)
+ goto next;
+ if (IPin_QueryInterface(pin, &IID_IKsPropertySet, (void **) &p) != S_OK)
+ goto next;
+ if (IKsPropertySet_Get(p, &AMPROPSETID_Pin, AMPROPERTY_PIN_CATEGORY,
+ NULL, 0, &category, sizeof(GUID), &r2) != S_OK)
+ goto next;
+ if (!IsEqualGUID(&category, &PIN_CATEGORY_CAPTURE))
+ goto next;
+
+ if (!ppin) {
+ char *buf = dup_wchar_to_utf8(info.achName);
+ av_log(avctx, AV_LOG_INFO, " Pin \"%s\"\n", buf);
+ av_free(buf);
+ dshow_cycle_formats(avctx, devtype, pin, NULL);
+ goto next;
+ }
+ if (set_format) {
+ dshow_cycle_formats(avctx, devtype, pin, &format_set);
+ if (!format_set) {
+ goto next;
+ }
+ }
+
+ if (IPin_EnumMediaTypes(pin, &types) != S_OK)
+ goto next;
+
+ IEnumMediaTypes_Reset(types);
+ while (!device_pin && IEnumMediaTypes_Next(types, 1, &type, NULL) == S_OK) {
+ if (IsEqualGUID(&type->majortype, mediatype[devtype])) {
+ device_pin = pin;
+ goto next;
+ }
+ CoTaskMemFree(type);
+ }
+
+next:
+ if (types)
+ IEnumMediaTypes_Release(types);
+ if (p)
+ IKsPropertySet_Release(p);
+ if (device_pin != pin)
+ IPin_Release(pin);
+ }
+
+ IEnumPins_Release(pins);
+
+ if (ppin) {
+ if (set_format && !format_set) {
+ av_log(avctx, AV_LOG_ERROR, "Could not set %s options\n", devtypename);
+ return AVERROR(EIO);
+ }
+ if (!device_pin) {
+ av_log(avctx, AV_LOG_ERROR,
+ "Could not find output pin from %s capture device.\n", devtypename);
+ return AVERROR(EIO);
+ }
+ *ppin = device_pin;
+ }
+
+ return 0;
+}
+
+/**
+ * List options for device with type devtype.
+ *
+ * @param devenum device enumerator used for accessing the device
+ */
+static int
+dshow_list_device_options(AVFormatContext *avctx, ICreateDevEnum *devenum,
+ enum dshowDeviceType devtype)
+{
+ IBaseFilter *device_filter = NULL;
+ int r;
+
+ if ((r = dshow_cycle_devices(avctx, devenum, devtype, &device_filter)) < 0)
+ return r;
+ if ((r = dshow_cycle_pins(avctx, devtype, device_filter, NULL)) < 0)
+ return r;
+
+ return 0;
+}
+
+static int
+dshow_open_device(AVFormatContext *avctx, ICreateDevEnum *devenum,
+ enum dshowDeviceType devtype)
+{
+ struct dshow_ctx *ctx = avctx->priv_data;
+ IBaseFilter *device_filter = NULL;
+ IGraphBuilder *graph = ctx->graph;
+ IPin *device_pin = NULL;
+ libAVPin *capture_pin = NULL;
+ libAVFilter *capture_filter = NULL;
+ int ret = AVERROR(EIO);
+ int r;
+
+ const wchar_t *filter_name[2] = { L"Audio capture filter", L"Video capture filter" };
+
+ if ((r = dshow_cycle_devices(avctx, devenum, devtype, &device_filter)) < 0) {
+ ret = r;
+ goto error;
+ }
+
+ ctx->device_filter [devtype] = device_filter;
+
+ r = IGraphBuilder_AddFilter(graph, device_filter, NULL);
+ if (r != S_OK) {
+ av_log(avctx, AV_LOG_ERROR, "Could not add device filter to graph.\n");
+ goto error;
+ }
+
+ if ((r = dshow_cycle_pins(avctx, devtype, device_filter, &device_pin)) < 0) {
+ ret = r;
+ goto error;
+ }
+ ctx->device_pin[devtype] = device_pin;
+
+ capture_filter = libAVFilter_Create(avctx, callback, devtype);
+ if (!capture_filter) {
+ av_log(avctx, AV_LOG_ERROR, "Could not create grabber filter.\n");
+ goto error;
+ }
+ ctx->capture_filter[devtype] = capture_filter;
+
+ r = IGraphBuilder_AddFilter(graph, (IBaseFilter *) capture_filter,
+ filter_name[devtype]);
+ if (r != S_OK) {
+ av_log(avctx, AV_LOG_ERROR, "Could not add capture filter to graph\n");
+ goto error;
+ }
+
+ libAVPin_AddRef(capture_filter->pin);
+ capture_pin = capture_filter->pin;
+ ctx->capture_pin[devtype] = capture_pin;
+
+ r = IGraphBuilder_ConnectDirect(graph, device_pin, (IPin *) capture_pin, NULL);
+ if (r != S_OK) {
+ av_log(avctx, AV_LOG_ERROR, "Could not connect pins\n");
+ goto error;
+ }
+
+ ret = 0;
+
+error:
+ return ret;
+}
+
+static enum CodecID waveform_codec_id(enum AVSampleFormat sample_fmt)
+{
+ switch (sample_fmt) {
+ case AV_SAMPLE_FMT_U8: return CODEC_ID_PCM_U8;
+ case AV_SAMPLE_FMT_S16: return CODEC_ID_PCM_S16LE;
+ case AV_SAMPLE_FMT_S32: return CODEC_ID_PCM_S32LE;
+ default: return CODEC_ID_NONE; /* Should never happen. */
+ }
+}
+
+static enum SampleFormat sample_fmt_bits_per_sample(int bits)
+{
+ switch (bits) {
+ case 8: return AV_SAMPLE_FMT_U8;
+ case 16: return AV_SAMPLE_FMT_S16;
+ case 32: return AV_SAMPLE_FMT_S32;
+ default: return AV_SAMPLE_FMT_NONE; /* Should never happen. */
+ }
+}
+
+static int
+dshow_add_device(AVFormatContext *avctx, AVFormatParameters *ap,
+ enum dshowDeviceType devtype)
+{
+ struct dshow_ctx *ctx = avctx->priv_data;
+ AM_MEDIA_TYPE type;
+ AVCodecContext *codec;
+ AVStream *st;
+ int ret = AVERROR(EIO);
+
+ st = av_new_stream(avctx, devtype);
+ if (!st) {
+ ret = AVERROR(ENOMEM);
+ goto error;
+ }
+
+ ctx->capture_filter[devtype]->stream_index = st->index;
+
+ libAVPin_ConnectionMediaType(ctx->capture_pin[devtype], &type);
+
+ codec = st->codec;
+ if (devtype == VideoDevice) {
+ BITMAPINFOHEADER *bih = NULL;
+
+ if (IsEqualGUID(&type.formattype, &FORMAT_VideoInfo)) {
+ VIDEOINFOHEADER *v = (void *) type.pbFormat;
+ bih = &v->bmiHeader;
+ } else if (IsEqualGUID(&type.formattype, &FORMAT_VideoInfo2)) {
+ VIDEOINFOHEADER2 *v = (void *) type.pbFormat;
+ bih = &v->bmiHeader;
+ }
+ if (!bih) {
+ av_log(avctx, AV_LOG_ERROR, "Could not get media type.\n");
+ goto error;
+ }
+
+ codec->time_base = ap->time_base;
+ codec->codec_type = AVMEDIA_TYPE_VIDEO;
+ codec->width = bih->biWidth;
+ codec->height = bih->biHeight;
+ codec->pix_fmt = dshow_pixfmt(bih->biCompression, bih->biBitCount);
+ if (codec->pix_fmt == PIX_FMT_NONE) {
+ codec->codec_id = dshow_codecid(bih->biCompression);
+ if (codec->codec_id == CODEC_ID_NONE) {
+ av_log(avctx, AV_LOG_ERROR, "Unknown compression type. "
+ "Please report verbose (-v 9) debug information.\n");
+ dshow_read_close(avctx);
+ return AVERROR_PATCHWELCOME;
+ }
+ codec->bits_per_coded_sample = bih->biBitCount;
+ } else {
+ codec->codec_id = CODEC_ID_RAWVIDEO;
+ if (bih->biCompression == BI_RGB) {
+ codec->bits_per_coded_sample = bih->biBitCount;
+ codec->extradata = av_malloc(9 + FF_INPUT_BUFFER_PADDING_SIZE);
+ if (codec->extradata) {
+ codec->extradata_size = 9;
+ memcpy(codec->extradata, "BottomUp", 9);
+ }
+ }
+ }
+ } else {
+ WAVEFORMATEX *fx = NULL;
+
+ if (IsEqualGUID(&type.formattype, &FORMAT_WaveFormatEx)) {
+ fx = (void *) type.pbFormat;
+ }
+ if (!fx) {
+ av_log(avctx, AV_LOG_ERROR, "Could not get media type.\n");
+ goto error;
+ }
+
+ codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ codec->sample_fmt = sample_fmt_bits_per_sample(fx->wBitsPerSample);
+ codec->codec_id = waveform_codec_id(codec->sample_fmt);
+ codec->sample_rate = fx->nSamplesPerSec;
+ codec->channels = fx->nChannels;
+ }
+
+ av_set_pts_info(st, 64, 1, 10000000);
+
+ ret = 0;
+
+error:
+ return ret;
+}
+
+static int parse_device_name(AVFormatContext *avctx)
+{
+ struct dshow_ctx *ctx = avctx->priv_data;
+ char **device_name = ctx->device_name;
+ char *name = av_strdup(avctx->filename);
+ char *tmp = name;
+ int ret = 1;
+ char *type;
+
+ while ((type = strtok(tmp, "="))) {
+ char *token = strtok(NULL, ":");
+ tmp = NULL;
+
+ if (!strcmp(type, "video")) {
+ device_name[0] = token;
+ } else if (!strcmp(type, "audio")) {
+ device_name[1] = token;
+ } else {
+ device_name[0] = NULL;
+ device_name[1] = NULL;
+ break;
+ }
+ }
+
+ if (!device_name[0] && !device_name[1]) {
+ ret = 0;
+ } else {
+ if (device_name[0])
+ device_name[0] = av_strdup(device_name[0]);
+ if (device_name[1])
+ device_name[1] = av_strdup(device_name[1]);
+ }
+
+ av_free(name);
+ return ret;
+}
+
+static int dshow_read_header(AVFormatContext *avctx, AVFormatParameters *ap)
+{
+ struct dshow_ctx *ctx = avctx->priv_data;
+ IGraphBuilder *graph = NULL;
+ ICreateDevEnum *devenum = NULL;
+ IMediaControl *control = NULL;
+ int ret = AVERROR(EIO);
+ int r;
+
+ if (!ctx->list_devices && !parse_device_name(avctx)) {
+ av_log(avctx, AV_LOG_ERROR, "Malformed dshow input string.\n");
+ goto error;
+ }
+
+ if (ctx->video_size) {
+ r = av_parse_video_size(&ctx->requested_width, &ctx->requested_height, ctx->video_size);
+ if (r < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Could not parse video size '%s'.\n", ctx->video_size);
+ goto error;
+ }
+ }
+ if (ctx->framerate) {
+ r = av_parse_video_rate(&ctx->requested_framerate, ctx->framerate);
+ if (r < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", ctx->framerate);
+ goto error;
+ }
+ }
+
+ CoInitialize(0);
+
+ r = CoCreateInstance(&CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER,
+ &IID_IGraphBuilder, (void **) &graph);
+ if (r != S_OK) {
+ av_log(avctx, AV_LOG_ERROR, "Could not create capture graph.\n");
+ goto error;
+ }
+ ctx->graph = graph;
+
+ r = CoCreateInstance(&CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER,
+ &IID_ICreateDevEnum, (void **) &devenum);
+ if (r != S_OK) {
+ av_log(avctx, AV_LOG_ERROR, "Could not enumerate system devices.\n");
+ goto error;
+ }
+
+ if (ctx->list_devices) {
+ av_log(avctx, AV_LOG_INFO, "DirectShow video devices\n");
+ dshow_cycle_devices(avctx, devenum, VideoDevice, NULL);
+ av_log(avctx, AV_LOG_INFO, "DirectShow audio devices\n");
+ dshow_cycle_devices(avctx, devenum, AudioDevice, NULL);
+ ret = AVERROR_EXIT;
+ goto error;
+ }
+ if (ctx->list_options) {
+ if (ctx->device_name[VideoDevice])
+ dshow_list_device_options(avctx, devenum, VideoDevice);
+ if (ctx->device_name[AudioDevice])
+ dshow_list_device_options(avctx, devenum, AudioDevice);
+ ret = AVERROR_EXIT;
+ goto error;
+ }
+
+ if (ctx->device_name[VideoDevice]) {
+ ret = dshow_open_device(avctx, devenum, VideoDevice);
+ if (ret < 0)
+ goto error;
+ ret = dshow_add_device(avctx, ap, VideoDevice);
+ if (ret < 0)
+ goto error;
+ }
+ if (ctx->device_name[AudioDevice]) {
+ ret = dshow_open_device(avctx, devenum, AudioDevice);
+ if (ret < 0)
+ goto error;
+ ret = dshow_add_device(avctx, ap, AudioDevice);
+ if (ret < 0)
+ goto error;
+ }
+
+ ctx->mutex = CreateMutex(NULL, 0, NULL);
+ if (!ctx->mutex) {
+ av_log(avctx, AV_LOG_ERROR, "Could not create Mutex\n");
+ goto error;
+ }
+ ctx->event = CreateEvent(NULL, 1, 0, NULL);
+ if (!ctx->event) {
+ av_log(avctx, AV_LOG_ERROR, "Could not create Event\n");
+ goto error;
+ }
+
+ r = IGraphBuilder_QueryInterface(graph, &IID_IMediaControl, (void **) &control);
+ if (r != S_OK) {
+ av_log(avctx, AV_LOG_ERROR, "Could not get media control.\n");
+ goto error;
+ }
+ ctx->control = control;
+
+ r = IMediaControl_Run(control);
+ if (r == S_FALSE) {
+ OAFilterState pfs;
+ r = IMediaControl_GetState(control, 0, &pfs);
+ }
+ if (r != S_OK) {
+ av_log(avctx, AV_LOG_ERROR, "Could not run filter\n");
+ goto error;
+ }
+
+ ret = 0;
+
+error:
+
+ if (ret < 0)
+ dshow_read_close(avctx);
+
+ if (devenum)
+ ICreateDevEnum_Release(devenum);
+
+ return ret;
+}
+
+static int dshow_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ struct dshow_ctx *ctx = s->priv_data;
+ AVPacketList *pktl = NULL;
+
+ while (!pktl) {
+ WaitForSingleObject(ctx->mutex, INFINITE);
+ pktl = ctx->pktl;
+ if (ctx->pktl) {
+ *pkt = ctx->pktl->pkt;
+ ctx->pktl = ctx->pktl->next;
+ av_free(pktl);
+ }
+ ResetEvent(ctx->event);
+ ReleaseMutex(ctx->mutex);
+ if (!pktl) {
+ if (s->flags & AVFMT_FLAG_NONBLOCK) {
+ return AVERROR(EAGAIN);
+ } else {
+ WaitForSingleObject(ctx->event, INFINITE);
+ }
+ }
+ }
+
+ ctx->curbufsize -= pkt->size;
+
+ return pkt->size;
+}
+
+#define OFFSET(x) offsetof(struct dshow_ctx, x)
+#define DEC AV_OPT_FLAG_DECODING_PARAM
+static const AVOption options[] = {
+ { "video_size", "set video size given a string such as 640x480 or hd720.", OFFSET(video_size), FF_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
+ { "framerate", "set video frame rate", OFFSET(framerate), FF_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
+ { "sample_rate", "set audio sample rate", OFFSET(sample_rate), FF_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, DEC },
+ { "sample_size", "set audio sample size", OFFSET(sample_size), FF_OPT_TYPE_INT, {.dbl = 0}, 0, 16, DEC },
+ { "channels", "set number of audio channels, such as 1 or 2", OFFSET(channels), FF_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, DEC },
+ { "list_devices", "list available devices", OFFSET(list_devices), FF_OPT_TYPE_INT, {.dbl=0}, 0, 1, DEC, "list_devices" },
+ { "true", "", 0, FF_OPT_TYPE_CONST, {.dbl=1}, 0, 0, DEC, "list_devices" },
+ { "false", "", 0, FF_OPT_TYPE_CONST, {.dbl=0}, 0, 0, DEC, "list_devices" },
+ { "list_options", "list available options for specified device", OFFSET(list_options), FF_OPT_TYPE_INT, {.dbl=0}, 0, 1, DEC, "list_options" },
+ { "true", "", 0, FF_OPT_TYPE_CONST, {.dbl=1}, 0, 0, DEC, "list_options" },
+ { "false", "", 0, FF_OPT_TYPE_CONST, {.dbl=0}, 0, 0, DEC, "list_options" },
+ { NULL },
+};
+
+static const AVClass dshow_class = {
+ .class_name = "DirectShow indev",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+AVInputFormat ff_dshow_demuxer = {
+ "dshow",
+ NULL_IF_CONFIG_SMALL("DirectShow capture"),
+ sizeof(struct dshow_ctx),
+ NULL,
+ dshow_read_header,
+ dshow_read_packet,
+ dshow_read_close,
+ .flags = AVFMT_NOFILE,
+ .priv_class = &dshow_class,
+};
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