gstreamer/gst/inter/gstinteraudiosink.c
Sebastian Dröge 6c3b3bef4e interaudiosink: Make sure to store at least period-time samples at once in the adapter
It's better to create some more silence than having the source pull multiple
short buffers out of the adapter and insert silence between them.
2014-11-12 18:10:45 +01:00

392 lines
13 KiB
C

/* GStreamer
* Copyright (C) 2011 David A. Schleef <ds@schleef.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Suite 500,
* Boston, MA 02110-1335, USA.
*/
/**
* SECTION:element-gstinteraudiosink
*
* The interaudiosink element is an audio sink element. It is used
* in connection with a interaudiosrc element in a different pipeline,
* similar to intervideosink and intervideosrc.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v audiotestsrc ! queue ! interaudiosink
* ]|
*
* The interaudiosink element cannot be used effectively with gst-launch,
* as it requires a second pipeline in the application to receive the
* audio.
* See the gstintertest.c example in the gst-plugins-bad source code for
* more details.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/base/gstbasesink.h>
#include <gst/audio/audio.h>
#include "gstinteraudiosink.h"
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (gst_inter_audio_sink_debug_category);
#define GST_CAT_DEFAULT gst_inter_audio_sink_debug_category
/* prototypes */
static void gst_inter_audio_sink_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec);
static void gst_inter_audio_sink_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec);
static void gst_inter_audio_sink_finalize (GObject * object);
static void gst_inter_audio_sink_get_times (GstBaseSink * sink,
GstBuffer * buffer, GstClockTime * start, GstClockTime * end);
static gboolean gst_inter_audio_sink_start (GstBaseSink * sink);
static gboolean gst_inter_audio_sink_stop (GstBaseSink * sink);
static gboolean gst_inter_audio_sink_set_caps (GstBaseSink * sink,
GstCaps * caps);
static gboolean gst_inter_audio_sink_event (GstBaseSink * sink,
GstEvent * event);
static GstFlowReturn gst_inter_audio_sink_render (GstBaseSink * sink,
GstBuffer * buffer);
static gboolean gst_inter_audio_sink_query (GstBaseSink * sink,
GstQuery * query);
enum
{
PROP_0,
PROP_CHANNEL
};
/* pad templates */
static GstStaticPadTemplate gst_inter_audio_sink_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_AUDIO_CAPS_MAKE (GST_AUDIO_FORMATS_ALL))
);
/* class initialization */
#define parent_class gst_inter_audio_sink_parent_class
G_DEFINE_TYPE (GstInterAudioSink, gst_inter_audio_sink, GST_TYPE_BASE_SINK);
static void
gst_inter_audio_sink_class_init (GstInterAudioSinkClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GstBaseSinkClass *base_sink_class = GST_BASE_SINK_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (gst_inter_audio_sink_debug_category,
"interaudiosink", 0, "debug category for interaudiosink element");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_inter_audio_sink_sink_template));
gst_element_class_set_static_metadata (element_class,
"Internal audio sink",
"Sink/Audio",
"Virtual audio sink for internal process communication",
"David Schleef <ds@schleef.org>");
gobject_class->set_property = gst_inter_audio_sink_set_property;
gobject_class->get_property = gst_inter_audio_sink_get_property;
gobject_class->finalize = gst_inter_audio_sink_finalize;
base_sink_class->get_times =
GST_DEBUG_FUNCPTR (gst_inter_audio_sink_get_times);
base_sink_class->start = GST_DEBUG_FUNCPTR (gst_inter_audio_sink_start);
base_sink_class->stop = GST_DEBUG_FUNCPTR (gst_inter_audio_sink_stop);
base_sink_class->event = GST_DEBUG_FUNCPTR (gst_inter_audio_sink_event);
base_sink_class->set_caps = GST_DEBUG_FUNCPTR (gst_inter_audio_sink_set_caps);
base_sink_class->render = GST_DEBUG_FUNCPTR (gst_inter_audio_sink_render);
base_sink_class->query = GST_DEBUG_FUNCPTR (gst_inter_audio_sink_query);
g_object_class_install_property (gobject_class, PROP_CHANNEL,
g_param_spec_string ("channel", "Channel",
"Channel name to match inter src and sink elements",
"default", G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
gst_inter_audio_sink_init (GstInterAudioSink * interaudiosink)
{
interaudiosink->channel = g_strdup ("default");
interaudiosink->input_adapter = gst_adapter_new ();
}
void
gst_inter_audio_sink_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GstInterAudioSink *interaudiosink = GST_INTER_AUDIO_SINK (object);
switch (property_id) {
case PROP_CHANNEL:
g_free (interaudiosink->channel);
interaudiosink->channel = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_inter_audio_sink_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GstInterAudioSink *interaudiosink = GST_INTER_AUDIO_SINK (object);
switch (property_id) {
case PROP_CHANNEL:
g_value_set_string (value, interaudiosink->channel);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_inter_audio_sink_finalize (GObject * object)
{
GstInterAudioSink *interaudiosink = GST_INTER_AUDIO_SINK (object);
/* clean up object here */
g_free (interaudiosink->channel);
gst_object_unref (interaudiosink->input_adapter);
G_OBJECT_CLASS (gst_inter_audio_sink_parent_class)->finalize (object);
}
static void
gst_inter_audio_sink_get_times (GstBaseSink * sink, GstBuffer * buffer,
GstClockTime * start, GstClockTime * end)
{
GstInterAudioSink *interaudiosink = GST_INTER_AUDIO_SINK (sink);
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
*start = GST_BUFFER_TIMESTAMP (buffer);
if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
*end = *start + GST_BUFFER_DURATION (buffer);
} else {
if (interaudiosink->info.rate > 0) {
*end = *start +
gst_util_uint64_scale_int (gst_buffer_get_size (buffer), GST_SECOND,
interaudiosink->info.rate * interaudiosink->info.bpf);
}
}
}
}
static gboolean
gst_inter_audio_sink_start (GstBaseSink * sink)
{
GstInterAudioSink *interaudiosink = GST_INTER_AUDIO_SINK (sink);
GST_DEBUG_OBJECT (interaudiosink, "start");
interaudiosink->surface = gst_inter_surface_get (interaudiosink->channel);
g_mutex_lock (&interaudiosink->surface->mutex);
memset (&interaudiosink->surface->audio_info, 0, sizeof (GstAudioInfo));
/* We want to write latency-time before syncing has happened */
/* FIXME: The other side can change this value when it starts */
gst_base_sink_set_render_delay (sink,
interaudiosink->surface->audio_latency_time);
g_mutex_unlock (&interaudiosink->surface->mutex);
return TRUE;
}
static gboolean
gst_inter_audio_sink_stop (GstBaseSink * sink)
{
GstInterAudioSink *interaudiosink = GST_INTER_AUDIO_SINK (sink);
GST_DEBUG_OBJECT (interaudiosink, "stop");
g_mutex_lock (&interaudiosink->surface->mutex);
gst_adapter_clear (interaudiosink->surface->audio_adapter);
memset (&interaudiosink->surface->audio_info, 0, sizeof (GstAudioInfo));
g_mutex_unlock (&interaudiosink->surface->mutex);
gst_inter_surface_unref (interaudiosink->surface);
interaudiosink->surface = NULL;
gst_adapter_clear (interaudiosink->input_adapter);
return TRUE;
}
static gboolean
gst_inter_audio_sink_set_caps (GstBaseSink * sink, GstCaps * caps)
{
GstInterAudioSink *interaudiosink = GST_INTER_AUDIO_SINK (sink);
GstAudioInfo info;
if (!gst_audio_info_from_caps (&info, caps)) {
GST_ERROR_OBJECT (sink, "Failed to parse caps %" GST_PTR_FORMAT, caps);
return FALSE;
}
g_mutex_lock (&interaudiosink->surface->mutex);
interaudiosink->surface->audio_info = info;
interaudiosink->info = info;
/* TODO: Ideally we would drain the source here */
gst_adapter_clear (interaudiosink->surface->audio_adapter);
g_mutex_unlock (&interaudiosink->surface->mutex);
return TRUE;
}
static gboolean
gst_inter_audio_sink_event (GstBaseSink * sink, GstEvent * event)
{
GstInterAudioSink *interaudiosink = GST_INTER_AUDIO_SINK (sink);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:{
GstBuffer *tmp;
guint n;
if ((n = gst_adapter_available (interaudiosink->input_adapter)) > 0) {
g_mutex_lock (&interaudiosink->surface->mutex);
tmp = gst_adapter_take_buffer (interaudiosink->input_adapter, n);
gst_adapter_push (interaudiosink->surface->audio_adapter, tmp);
g_mutex_unlock (&interaudiosink->surface->mutex);
}
break;
}
default:
break;
}
return GST_BASE_SINK_CLASS (parent_class)->event (sink, event);
}
static GstFlowReturn
gst_inter_audio_sink_render (GstBaseSink * sink, GstBuffer * buffer)
{
GstInterAudioSink *interaudiosink = GST_INTER_AUDIO_SINK (sink);
guint n, bpf;
guint64 period_time, buffer_time;
guint64 period_samples, buffer_samples;
GST_DEBUG_OBJECT (interaudiosink, "render %" G_GSIZE_FORMAT,
gst_buffer_get_size (buffer));
bpf = interaudiosink->info.bpf;
g_mutex_lock (&interaudiosink->surface->mutex);
buffer_time = interaudiosink->surface->audio_buffer_time;
period_time = interaudiosink->surface->audio_period_time;
buffer_samples =
gst_util_uint64_scale (buffer_time, interaudiosink->info.rate,
GST_SECOND);
period_samples =
gst_util_uint64_scale (period_time, interaudiosink->info.rate,
GST_SECOND);
n = gst_adapter_available (interaudiosink->surface->audio_adapter) / bpf;
while (n > buffer_samples) {
GST_WARNING_OBJECT (interaudiosink, "flushing %" GST_TIME_FORMAT,
GST_TIME_ARGS (period_time));
gst_adapter_flush (interaudiosink->surface->audio_adapter,
period_samples * bpf);
n -= period_samples;
}
n = gst_adapter_available (interaudiosink->input_adapter);
if (period_samples * bpf > gst_buffer_get_size (buffer) + n) {
gst_adapter_push (interaudiosink->input_adapter, gst_buffer_ref (buffer));
} else {
GstBuffer *tmp;
if (n > 0) {
tmp = gst_adapter_take_buffer (interaudiosink->input_adapter, n);
gst_adapter_push (interaudiosink->surface->audio_adapter, tmp);
}
gst_adapter_push (interaudiosink->surface->audio_adapter,
gst_buffer_ref (buffer));
}
g_mutex_unlock (&interaudiosink->surface->mutex);
return GST_FLOW_OK;
}
static gboolean
gst_inter_audio_sink_query (GstBaseSink * sink, GstQuery * query)
{
GstInterAudioSink *interaudiosink = GST_INTER_AUDIO_SINK (sink);
gboolean ret;
GST_DEBUG_OBJECT (sink, "query");
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:{
gboolean live, us_live;
GstClockTime min_l, max_l;
GST_DEBUG_OBJECT (sink, "latency query");
if ((ret =
gst_base_sink_query_latency (GST_BASE_SINK_CAST (sink), &live,
&us_live, &min_l, &max_l))) {
GstClockTime base_latency, min_latency, max_latency;
/* we and upstream are both live, adjust the min_latency */
if (live && us_live) {
/* FIXME: The other side can change this value when it starts */
base_latency = interaudiosink->surface->audio_latency_time;
/* we cannot go lower than the buffer size and the min peer latency */
min_latency = base_latency + min_l;
/* the max latency is the max of the peer, we can delay an infinite
* amount of time. */
max_latency = (max_l == -1) ? -1 : (base_latency + max_l);
GST_DEBUG_OBJECT (sink,
"peer min %" GST_TIME_FORMAT ", our min latency: %"
GST_TIME_FORMAT, GST_TIME_ARGS (min_l),
GST_TIME_ARGS (min_latency));
GST_DEBUG_OBJECT (sink,
"peer max %" GST_TIME_FORMAT ", our max latency: %"
GST_TIME_FORMAT, GST_TIME_ARGS (max_l),
GST_TIME_ARGS (max_latency));
} else {
GST_DEBUG_OBJECT (sink,
"peer or we are not live, don't care about latency");
min_latency = min_l;
max_latency = max_l;
}
gst_query_set_latency (query, live, min_latency, max_latency);
}
break;
}
default:
ret =
GST_BASE_SINK_CLASS (gst_inter_audio_sink_parent_class)->query (sink,
query);
break;
}
return ret;
}