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wasapi2ringbuffer: Implement GstAudioRingBuffer::pause()

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WASAPI doesn't support PAUSE so it's not different from Stop().
When pipeline is in paused state, we don't need to waste CPU resource
for feeding silent buffers.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2315>
This commit is contained in:
Seungha Yang 2021-06-10 00:24:24 +09:00 committed by GStreamer Marge Bot
parent f90506e33b
commit cd9b96e143
1 changed files with 64 additions and 9 deletions
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73
sys/wasapi2/gstwasapi2ringbuffer.cpp
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@ -186,6 +186,8 @@ static gboolean gst_wasapi2_ring_buffer_acquire (GstAudioRingBuffer * buf,
GstAudioRingBufferSpec * spec);
static gboolean gst_wasapi2_ring_buffer_release (GstAudioRingBuffer * buf);
static gboolean gst_wasapi2_ring_buffer_start (GstAudioRingBuffer * buf);
static gboolean gst_wasapi2_ring_buffer_resume (GstAudioRingBuffer * buf);
static gboolean gst_wasapi2_ring_buffer_pause (GstAudioRingBuffer * buf);
static gboolean gst_wasapi2_ring_buffer_stop (GstAudioRingBuffer * buf);
static guint gst_wasapi2_ring_buffer_delay (GstAudioRingBuffer * buf);
@ -213,7 +215,9 @@ gst_wasapi2_ring_buffer_class_init (GstWasapi2RingBufferClass * klass)
ring_buffer_class->release =
GST_DEBUG_FUNCPTR (gst_wasapi2_ring_buffer_release);
ring_buffer_class->start = GST_DEBUG_FUNCPTR (gst_wasapi2_ring_buffer_start);
ring_buffer_class->resume = GST_DEBUG_FUNCPTR (gst_wasapi2_ring_buffer_start);
ring_buffer_class->resume =
GST_DEBUG_FUNCPTR (gst_wasapi2_ring_buffer_resume);
ring_buffer_class->pause = GST_DEBUG_FUNCPTR (gst_wasapi2_ring_buffer_pause);
ring_buffer_class->stop = GST_DEBUG_FUNCPTR (gst_wasapi2_ring_buffer_stop);
ring_buffer_class->delay = GST_DEBUG_FUNCPTR (gst_wasapi2_ring_buffer_delay);
@ -589,8 +593,19 @@ gst_wasapi2_ring_buffer_write (GstWasapi2RingBuffer * self, gboolean preroll)
while (can_write_bytes > 0) {
if (!gst_audio_ring_buffer_prepare_read (ringbuffer,
&segment, &readptr, &len)) {
GST_INFO_OBJECT (self, "No segment available");
return S_OK;
GST_INFO_OBJECT (self, "No segment available, fill silence");
/* This would be case where in the middle of PAUSED state change.
* Just fill silent buffer to avoid immediate I/O callback after
* we return here */
hr = render_client->GetBuffer (can_write, &data);
if (!gst_wasapi2_result (hr))
return hr;
hr = render_client->ReleaseBuffer (can_write, AUDCLNT_BUFFERFLAGS_SILENT);
/* for debugging */
gst_wasapi2_result (hr);
return hr;
}
len -= self->segoffset;
@ -1097,13 +1112,15 @@ gst_wasapi2_ring_buffer_release (GstAudioRingBuffer * buf)
}
static gboolean
gst_wasapi2_ring_buffer_start (GstAudioRingBuffer * buf)
gst_wasapi2_ring_buffer_start_internal (GstWasapi2RingBuffer *self)
{
GstWasapi2RingBuffer *self = GST_WASAPI2_RING_BUFFER (buf);
IAudioClient *client_handle;
HRESULT hr;
GST_DEBUG_OBJECT (self, "Start");
if (self->running) {
GST_INFO_OBJECT (self, "We are running already");
return TRUE;
}
client_handle = gst_wasapi2_client_get_handle (self->client);
self->is_first = TRUE;
@ -1174,14 +1191,31 @@ error:
}
static gboolean
gst_wasapi2_ring_buffer_stop (GstAudioRingBuffer * buf)
gst_wasapi2_ring_buffer_start (GstAudioRingBuffer * buf)
{
GstWasapi2RingBuffer *self = GST_WASAPI2_RING_BUFFER (buf);
GST_DEBUG_OBJECT (self, "Start");
return gst_wasapi2_ring_buffer_start_internal (self);
}
static gboolean
gst_wasapi2_ring_buffer_resume (GstAudioRingBuffer * buf)
{
GstWasapi2RingBuffer *self = GST_WASAPI2_RING_BUFFER (buf);
GST_DEBUG_OBJECT (self, "Resume");
return gst_wasapi2_ring_buffer_start_internal (self);
}
static gboolean
gst_wasapi2_ring_buffer_stop_internal (GstWasapi2RingBuffer *self)
{
IAudioClient *client_handle;
HRESULT hr;
GST_DEBUG_OBJECT (buf, "Stop");
if (!self->client) {
GST_DEBUG_OBJECT (self, "No configured client");
return TRUE;
@ -1203,6 +1237,7 @@ gst_wasapi2_ring_buffer_stop (GstAudioRingBuffer * buf)
/* Call reset for later reuse case */
hr = client_handle->Reset ();
self->expected_position = 0;
self->write_frame_offset = 0;
if (self->loopback_client) {
client_handle = gst_wasapi2_client_get_handle (self->loopback_client);
@ -1218,6 +1253,26 @@ gst_wasapi2_ring_buffer_stop (GstAudioRingBuffer * buf)
return TRUE;
}
static gboolean
gst_wasapi2_ring_buffer_stop (GstAudioRingBuffer * buf)
{
GstWasapi2RingBuffer *self = GST_WASAPI2_RING_BUFFER (buf);
GST_DEBUG_OBJECT (buf, "Stop");
return gst_wasapi2_ring_buffer_stop_internal (self);
}
static gboolean
gst_wasapi2_ring_buffer_pause (GstAudioRingBuffer * buf)
{
GstWasapi2RingBuffer *self = GST_WASAPI2_RING_BUFFER (buf);
GST_DEBUG_OBJECT (buf, "Pause");
return gst_wasapi2_ring_buffer_stop_internal (self);
}
static guint
gst_wasapi2_ring_buffer_delay (GstAudioRingBuffer * buf)
{