+ 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;
+