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pulsesink: add beginnings of pull-based scheduling

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This commit is contained in:
Wim Taymans 2009-04-09 12:13:44 +02:00
parent 236baa5a13
commit 8855ed90c0
1 changed files with 116 additions and 19 deletions
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135
ext/pulse/pulsesink.c
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@ -470,6 +470,99 @@ gst_pulsering_stream_state_cb (pa_stream * s, void *userdata)
}
}
static void
gst_pulsering_pull (GstPulseSink * psink, GstPulseRingBuffer * pbuf)
{
GstBaseSink *basesink;
GstBaseAudioSink *sink;
GstBuffer *buf;
GstRingBuffer *rbuf;
GstFlowReturn ret;
guint len;
basesink = GST_BASE_SINK (psink);
sink = GST_BASE_AUDIO_SINK (psink);
rbuf = GST_RING_BUFFER_CAST (pbuf);
GST_PAD_STREAM_LOCK (basesink->sinkpad);
len = 882;
/* would be nice to arrange for pad_alloc_buffer to return data -- as it is we
will copy twice, once into data, once into DMA */
GST_LOG_OBJECT (basesink, "pulling %d bytes offset %" G_GUINT64_FORMAT
" to fill audio buffer", len, basesink->offset);
ret =
gst_pad_pull_range (basesink->sinkpad, basesink->segment.last_stop, len,
&buf);
if (ret != GST_FLOW_OK) {
if (ret == GST_FLOW_UNEXPECTED)
goto eos;
else
goto error;
}
GST_PAD_PREROLL_LOCK (basesink->sinkpad);
if (basesink->flushing)
goto flushing;
/* complete preroll and wait for PLAYING */
ret = gst_base_sink_do_preroll (basesink, GST_MINI_OBJECT_CAST (buf));
if (ret != GST_FLOW_OK)
goto preroll_error;
if (len != GST_BUFFER_SIZE (buf)) {
GST_INFO_OBJECT (basesink,
"got different size than requested from sink pad: %u != %u", len,
GST_BUFFER_SIZE (buf));
len = MIN (GST_BUFFER_SIZE (buf), len);
}
basesink->segment.last_stop += len;
GST_PAD_PREROLL_UNLOCK (basesink->sinkpad);
GST_PAD_STREAM_UNLOCK (basesink->sinkpad);
return;
error:
{
GST_WARNING_OBJECT (basesink, "Got flow '%s' but can't return it: %d",
gst_flow_get_name (ret), ret);
gst_ring_buffer_pause (rbuf);
GST_PAD_STREAM_UNLOCK (basesink->sinkpad);
return;
}
eos:
{
/* FIXME: this is not quite correct; we'll be called endlessly until
* the sink gets shut down; maybe we should set a flag somewhere, or
* set segment.stop and segment.duration to the last sample or so */
GST_DEBUG_OBJECT (sink, "EOS");
gst_ring_buffer_pause (rbuf);
gst_element_post_message (GST_ELEMENT_CAST (sink),
gst_message_new_eos (GST_OBJECT_CAST (sink)));
GST_PAD_STREAM_UNLOCK (basesink->sinkpad);
}
flushing:
{
GST_DEBUG_OBJECT (sink, "we are flushing");
gst_ring_buffer_pause (rbuf);
GST_PAD_PREROLL_UNLOCK (basesink->sinkpad);
GST_PAD_STREAM_UNLOCK (basesink->sinkpad);
return;
}
preroll_error:
{
GST_DEBUG_OBJECT (sink, "error %s", gst_flow_get_name (ret));
gst_ring_buffer_pause (rbuf);
GST_PAD_PREROLL_UNLOCK (basesink->sinkpad);
GST_PAD_STREAM_UNLOCK (basesink->sinkpad);
return;
}
}
static void
gst_pulsering_stream_request_cb (pa_stream * s, size_t length, void *userdata)
{
@ -481,7 +574,10 @@ gst_pulsering_stream_request_cb (pa_stream * s, size_t length, void *userdata)
GST_LOG_OBJECT (psink, "got request for length %" G_GSIZE_FORMAT, length);
if (pbuf->in_commit) {
if (GST_RING_BUFFER_CAST (pbuf)->callback) {
/* in pull mode */
gst_pulsering_pull (psink, pbuf);
} else if (pbuf->in_commit) {
pa_threaded_mainloop_signal (psink->mainloop, 0);
}
}
@ -586,23 +682,6 @@ gst_pulseringbuffer_acquire (GstRingBuffer * buf, GstRingBufferSpec * spec)
&buf_attr, flags, pv, NULL) < 0)
goto connect_failed;
for (;;) {
pa_stream_state_t state;
state = pa_stream_get_state (pbuf->stream);
GST_LOG_OBJECT (psink, "stream state is now %d", state);
if (!PA_STREAM_IS_GOOD (state))
goto connect_failed;
if (state == PA_STREAM_READY)
break;
/* Wait until the stream is ready */
pa_threaded_mainloop_wait (psink->mainloop);
}
/* our clock will now start from 0 again */
clock = GST_AUDIO_CLOCK (GST_BASE_AUDIO_SINK (psink)->provided_clock);
gst_audio_clock_reset (clock, 0);
@ -620,6 +699,22 @@ gst_pulseringbuffer_acquire (GstRingBuffer * buf, GstRingBufferSpec * spec)
pbuf->sample_spec.rate, GST_SECOND);
GST_LOG_OBJECT (psink, "sample offset %" G_GINT64_FORMAT, pbuf->offset);
for (;;) {
pa_stream_state_t state;
state = pa_stream_get_state (pbuf->stream);
GST_LOG_OBJECT (psink, "stream state is now %d", state);
if (!PA_STREAM_IS_GOOD (state))
goto connect_failed;
if (state == PA_STREAM_READY)
break;
/* Wait until the stream is ready */
pa_threaded_mainloop_wait (psink->mainloop);
}
GST_LOG_OBJECT (psink, "stream is acquired now");
@ -701,6 +796,8 @@ gst_pulseringbuffer_activate (GstRingBuffer * buf, gboolean active)
psink = GST_PULSESINK_CAST (GST_OBJECT_PARENT (buf));
GST_DEBUG_OBJECT (psink, "activating");
return TRUE;
}
@ -1338,7 +1435,7 @@ gst_pulsesink_init (GstPulseSink * pulsesink, GstPulseSinkClass * klass)
g_assert ((pulsesink->mainloop = pa_threaded_mainloop_new ()));
g_assert (pa_threaded_mainloop_start (pulsesink->mainloop) == 0);
// GST_BASE_SINK (pulsesink)->can_activate_pull = TRUE;
GST_BASE_SINK (pulsesink)->can_activate_pull = TRUE;
pulsesink->probe = gst_pulseprobe_new (G_OBJECT (pulsesink), G_OBJECT_GET_CLASS (pulsesink), PROP_DEVICE, pulsesink->device, TRUE, FALSE); /* TRUE for sinks, FALSE for sources */