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dshowaudiosrc: fix audiocapture producing silence
Configure the capture latency using the IAMBufferNegotiation interface and try to respect the configured latency-time and buffer-time
This commit is contained in:
parent
d50625eeb0
commit
c450a15f9f
3 changed files with 35 additions and 3 deletions
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@ -496,3 +496,21 @@ gst_dshow_new_video_caps (GstVideoFormat video_format, const gchar * name,
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return video_caps;
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return video_caps;
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}
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}
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bool gst_dshow_configure_latency (IPin *pCapturePin, guint bufSizeMS)
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{
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HRESULT hr;
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ALLOCATOR_PROPERTIES alloc_prop;
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IAMBufferNegotiation * pNeg = NULL;
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hr = pCapturePin->QueryInterface(IID_IAMBufferNegotiation, (void **)&pNeg);
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if(!SUCCEEDED (hr))
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return FALSE;
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alloc_prop.cbAlign = -1; // -1 means no preference.
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alloc_prop.cbBuffer = bufSizeMS;
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alloc_prop.cbPrefix = -1;
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alloc_prop.cBuffers = -1;
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hr = pNeg->SuggestAllocatorProperties (&alloc_prop);
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return SUCCEEDED (hr);
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}
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@ -96,4 +96,7 @@ GstVideoFormat gst_dshow_guid_to_gst_video_format (AM_MEDIA_TYPE *mediatype);
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GstCaps *gst_dshow_new_video_caps (GstVideoFormat video_format,
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GstCaps *gst_dshow_new_video_caps (GstVideoFormat video_format,
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const gchar * name, GstCapturePinMediaType * pin_mediatype);
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const gchar * name, GstCapturePinMediaType * pin_mediatype);
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/* configure the latency of the capture source */
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bool gst_dshow_configure_latency (IPin *pCapturePin, guint bufSizeMS);
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#endif /* _GSTDSHOW_ */
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#endif /* _GSTDSHOW_ */
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@ -626,6 +626,18 @@ gst_dshowaudiosrc_prepare (GstAudioSrc * asrc, GstRingBufferSpec * spec)
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goto error;
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goto error;
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}
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}
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spec->segsize = (gint) (spec->bytes_per_sample * spec->rate * spec->latency_time /
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GST_MSECOND);
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spec->segtotal = (gint) ((gfloat) spec->buffer_time /
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(gfloat) spec->latency_time + 0.5);
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if (!gst_dshow_configure_latency (pin_mediatype->capture_pin,
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spec->segsize))
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{
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GST_WARNING ("Could not change capture latency");
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spec->segsize = spec->rate * spec->channels;
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spec->segtotal = 2;
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};
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GST_INFO ("Configuring with segsize:%d segtotal:%d", spec->segsize, spec->segtotal);
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hres = src->filter_graph->ConnectDirect (pin_mediatype->capture_pin,
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hres = src->filter_graph->ConnectDirect (pin_mediatype->capture_pin,
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input_pin, NULL);
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input_pin, NULL);
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input_pin->Release ();
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input_pin->Release ();
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@ -637,8 +649,6 @@ gst_dshowaudiosrc_prepare (GstAudioSrc * asrc, GstRingBufferSpec * spec)
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goto error;
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goto error;
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}
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}
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spec->segsize = spec->rate * spec->channels;
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spec->segtotal = 1;
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}
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}
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}
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}
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}
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}
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@ -720,7 +730,8 @@ gst_dshowaudiosrc_read (GstAudioSrc * asrc, gpointer data, guint length)
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g_mutex_unlock (src->gbarray_lock);
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g_mutex_unlock (src->gbarray_lock);
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} else {
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} else {
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if (src->is_running) {
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if (src->is_running) {
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Sleep (100);
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Sleep (GST_BASE_AUDIO_SRC(src)->ringbuffer->spec.latency_time /
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GST_MSECOND / 10);
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goto test;
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goto test;
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}
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}
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}
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}
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