gstreamer/ext/polyp/polypsink.c

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/*
* This sink plugin works, but has some room for improvements:
*
* - Export polypaudio's stream clock through gstreamer's API
* - Add support for querying latency information
* - Add a source for polypaudio
*
* Lennart Poettering, 2004
*/
#include <pthread.h>
#include <string.h>
#include <stdio.h>
#include <polyp/polyplib-error.h>
#include <polyp/mainloop.h>
#include "polypsink.h"
enum
{
ARG_0,
ARG_SERVER,
ARG_SINK,
};
static GstElementClass *parent_class = NULL;
static void create_stream (GstPolypSink * polypsink);
static void destroy_stream (GstPolypSink * polypsink);
static void create_context (GstPolypSink * polypsink);
static void destroy_context (GstPolypSink * polypsink);
static void
gst_polypsink_base_init (gpointer g_class)
{
static GstStaticPadTemplate pad_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"endianness = (int) { LITTLE_ENDIAN , BIG_ENDIAN }, "
"signed = (boolean) TRUE, "
"width = (int) 16, "
"depth = (int) 16, "
"rate = (int) [ 1, MAX ], "
"channels = (int) [ 1, 16 ];"
"audio/x-raw-float, "
"endianness = (int) { LITTLE_ENDIAN, BIG_ENDIAN }, "
"width = (int) 32, "
"rate = (int) [ 1, MAX ], "
"channels = (int) [ 1, 16 ];"
"audio/x-raw-int, "
"signed = (boolean) FALSE, "
"width = (int) 8, "
"depth = (int) 8, "
"rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 16 ]")
);
static const GstElementDetails details = {
"Polypaudio Audio Sink",
"Sink/Audio",
"Plays audio to a Polypaudio server",
"Lennart Poettering",
};
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&pad_template));
gst_element_class_set_details (element_class, &details);
}
static void
gst_polypsink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstPolypSink *polypsink;
g_return_if_fail (GST_IS_POLYPSINK (object));
polypsink = GST_POLYPSINK (object);
switch (prop_id) {
case ARG_SERVER:
g_free (polypsink->server);
polypsink->server = g_strdup (g_value_get_string (value));
break;
case ARG_SINK:
g_free (polypsink->sink);
polypsink->sink = g_strdup (g_value_get_string (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_polypsink_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstPolypSink *polypsink;
g_return_if_fail (GST_IS_POLYPSINK (object));
polypsink = GST_POLYPSINK (object);
switch (prop_id) {
case ARG_SERVER:
g_value_set_string (value, polypsink->server);
break;
case ARG_SINK:
g_value_set_string (value, polypsink->sink);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstElementStateReturn
gst_polypsink_change_state (GstElement * element)
{
GstPolypSink *polypsink;
polypsink = GST_POLYPSINK (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_NULL_TO_READY:
create_context (polypsink);
break;
case GST_STATE_READY_TO_NULL:
destroy_context (polypsink);
break;
case GST_STATE_READY_TO_PAUSED:
create_stream (polypsink);
if (polypsink->stream
&& pa_stream_get_state (polypsink->stream) == PA_STREAM_READY)
pa_operation_unref (pa_stream_cork (polypsink->stream, 1, NULL, NULL));
break;
case GST_STATE_PLAYING_TO_PAUSED:
if (polypsink->stream
&& pa_stream_get_state (polypsink->stream) == PA_STREAM_READY)
pa_operation_unref (pa_stream_cork (polypsink->stream, 1, NULL, NULL));
break;
case GST_STATE_PAUSED_TO_PLAYING:
create_stream (polypsink);
if (polypsink->stream
&& pa_stream_get_state (polypsink->stream) == PA_STREAM_READY)
pa_operation_unref (pa_stream_cork (polypsink->stream, 0, NULL, NULL));
break;
case GST_STATE_PAUSED_TO_READY:
destroy_stream (polypsink);
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
static void
do_write (GstPolypSink * polypsink, size_t length)
{
size_t l;
if (!polypsink->buffer)
return;
g_assert (polypsink->buffer_index < GST_BUFFER_SIZE (polypsink->buffer));
l = GST_BUFFER_SIZE (polypsink->buffer) - polypsink->buffer_index;
if (l > length)
l = length;
pa_stream_write (polypsink->stream,
GST_BUFFER_DATA (polypsink->buffer) + polypsink->buffer_index, l, NULL,
0);
polypsink->buffer_index += l;
if (polypsink->buffer_index >= GST_BUFFER_SIZE (polypsink->buffer)) {
gst_buffer_unref (polypsink->buffer);
polypsink->buffer = NULL;
polypsink->buffer_index = 0;
}
}
static void
stream_write_callback (struct pa_stream *s, size_t length, void *userdata)
{
GstPolypSink *polypsink = userdata;
g_assert (s && length && polypsink);
do_write (polypsink, length);
}
static void
stream_state_callback (struct pa_stream *s, void *userdata)
{
GstPolypSink *polypsink = userdata;
g_assert (s && polypsink);
switch (pa_stream_get_state (s)) {
case PA_STREAM_DISCONNECTED:
case PA_STREAM_CREATING:
break;
case PA_STREAM_READY:
break;
case PA_STREAM_FAILED:
GST_ELEMENT_ERROR (GST_ELEMENT (polypsink), RESOURCE, BUSY,
("Stream creation failed: %s",
pa_strerror (pa_context_errno (pa_stream_get_context (s)))),
(NULL));
/* Pass over */
case PA_STREAM_TERMINATED:
default:
polypsink->mainloop_api->quit (polypsink->mainloop_api, 1);
destroy_context (polypsink);
break;
}
}
static void
context_state_callback (struct pa_context *c, void *userdata)
{
GstPolypSink *polypsink = userdata;
g_assert (c && polypsink);
switch (pa_context_get_state (c)) {
case PA_CONTEXT_UNCONNECTED:
case PA_CONTEXT_CONNECTING:
case PA_CONTEXT_AUTHORIZING:
case PA_CONTEXT_SETTING_NAME:
break;
case PA_CONTEXT_READY:{
GstElementState state;
g_assert (!polypsink->stream);
state = gst_element_get_state (GST_ELEMENT (polypsink));
if (state == GST_STATE_PAUSED || state == GST_STATE_PLAYING)
create_stream (polypsink);
break;
}
case PA_CONTEXT_FAILED:
GST_ELEMENT_ERROR (GST_ELEMENT (polypsink), RESOURCE, BUSY,
("Connection failed: %s", pa_strerror (pa_context_errno (c))),
(NULL));
/* Pass over */
case PA_CONTEXT_TERMINATED:
default:
polypsink->mainloop_api->quit (polypsink->mainloop_api, 1);
destroy_context (polypsink);
break;
}
}
static void
create_stream (GstPolypSink * polypsink)
{
char t[256];
g_assert (polypsink);
if (polypsink->stream)
return;
if (!polypsink->context) {
create_context (polypsink);
return;
}
if (!polypsink->negotiated)
return;
if (pa_context_get_state (polypsink->context) != PA_CONTEXT_READY)
return;
pa_sample_spec_snprint (t, sizeof (t), &polypsink->sample_spec);
polypsink->stream =
pa_stream_new (polypsink->context, "gstreamer output",
&polypsink->sample_spec);
g_assert (polypsink->stream);
pa_stream_set_state_callback (polypsink->stream, stream_state_callback,
polypsink);
pa_stream_set_write_callback (polypsink->stream, stream_write_callback,
polypsink);
pa_stream_connect_playback (polypsink->stream, NULL, NULL,
PA_STREAM_INTERPOLATE_LATENCY, PA_VOLUME_NORM);
while (polypsink->context && pa_context_is_pending (polypsink->context)) {
if (pa_mainloop_iterate (polypsink->mainloop, 1, NULL) < 0)
return;
}
}
static void
create_context (GstPolypSink * polypsink)
{
g_assert (polypsink);
if (polypsink->context)
return;
polypsink->context = pa_context_new (polypsink->mainloop_api, "gstreamer");
g_assert (polypsink->context);
pa_context_set_state_callback (polypsink->context, context_state_callback,
polypsink);
pa_context_connect (polypsink->context, NULL, 1, NULL);
}
static void
destroy_stream (GstPolypSink * polypsink)
{
g_assert (polypsink);
if (polypsink->stream) {
struct pa_stream *s = polypsink->stream;
polypsink->stream = NULL;
pa_stream_set_state_callback (s, NULL, NULL);
pa_stream_set_write_callback (s, NULL, NULL);
pa_stream_unref (s);
}
}
static void
destroy_context (GstPolypSink * polypsink)
{
destroy_stream (polypsink);
if (polypsink->context) {
struct pa_context *c = polypsink->context;
polypsink->context = NULL;
pa_context_set_state_callback (c, NULL, NULL);
pa_context_unref (c);
}
}
static void
gst_polypsink_chain (GstPad * pad, GstData * data)
{
GstPolypSink *polypsink = GST_POLYPSINK (gst_pad_get_parent (pad));
g_assert (!polypsink->buffer);
if (GST_IS_EVENT (data)) {
GstEvent *event = GST_EVENT (data);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
if (polypsink->stream) {
struct pa_operation *o;
pa_operation_unref (pa_stream_cork (polypsink->stream, 0, NULL,
NULL));
o = pa_stream_drain (polypsink->stream, NULL, NULL);
/* drain now */
while (pa_operation_get_state (o) == PA_OPERATION_RUNNING) {
if (pa_mainloop_iterate (polypsink->mainloop, 1, NULL) < 0)
return;
}
pa_operation_unref (o);
}
break;
case GST_EVENT_FLUSH:
if (polypsink->stream)
pa_operation_unref (pa_stream_flush (polypsink->stream, NULL, NULL));
break;
default:
break;
}
gst_pad_event_default (polypsink->sinkpad, event);
} else {
size_t l;
polypsink->buffer = GST_BUFFER (data);
polypsink->buffer_index = 0;
polypsink->counter += GST_BUFFER_SIZE (polypsink->buffer);
if (polypsink->stream
&& (l = pa_stream_writable_size (polypsink->stream)) > 0)
do_write (polypsink, l);
}
while (polypsink->context && (pa_context_is_pending (polypsink->context)
|| polypsink->buffer)) {
if (pa_mainloop_iterate (polypsink->mainloop, 1, NULL) < 0)
return;
}
}
#if 0
static void
stream_get_latency_callback (struct pa_stream *s,
const struct pa_latency_info *i, void *userdata)
{
GstPolypSink *polypsink = (GstPolypSink *) userdata;
polypsink->latency = i->buffer_usec + i->sink_usec;
}
static GstClockTime
gst_polypsink_get_time (GstClock * clock, gpointer data)
{
struct pa_operation *o;
GstPolypSink *polypsink = GST_POLYPSINK (data);
GstClockTime r, l;
if (!polypsink->stream
|| pa_stream_get_state (polypsink->stream) != PA_STREAM_READY)
return 0;
polypsink->latency = 0;
o = pa_stream_get_latency (polypsink_ > stream, latency_func, polypsink);
g_assert (o);
while (pa_operation_get_state (o) == PA_OPERATION_RUNNING) {
if (pa_mainloop_iterate (polypsink->mainloop, 1, NULL) < 0)
return;
}
r = ((GstClockTime) polypsink->counter /
pa_frame_size (&polypsink->sample_spec)) * GST_SECOND /
polypsink->sample_spec.rate;
l = polypsink->latency * GST_USECOND;
return r > l ? r - l : 0;
}
static GstClock *
gst_polypsink_get_clock (GstElement * element)
{
GstPolypSink *polypsink = GST_POLYPSINK (element);
return GST_CLOCK (polypsink->provided_clock);
}
static void
gst_polypsink_set_clock (GstElement * element, GstClock * clock)
{
GstPolypSink *polypsink = GST_POLYPSINK (element);
polypsink->clock = clock;
}
#endif
static GstPadLinkReturn
gst_polypsink_link (GstPad * pad, const GstCaps * caps)
{
int depth = 16, endianness = 1234;
gboolean sign = TRUE;
GstPolypSink *polypsink;
GstStructure *structure;
const char *n;
char t[256];
GstElementState state;
polypsink = GST_POLYPSINK (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
if (!(gst_structure_get_int (structure, "depth", &depth)))
gst_structure_get_int (structure, "width", &depth);
gst_structure_get_int (structure, "endianness", &endianness);
gst_structure_get_boolean (structure, "signed", &sign);
n = gst_structure_get_name (structure);
if (depth == 16 && endianness == 1234 && sign
&& !strcmp (n, "audio/x-raw-int"))
polypsink->sample_spec.format = PA_SAMPLE_S16LE;
else if (depth == 16 && endianness == 4321 && sign
&& !strcmp (n, "audio/x-raw-int"))
polypsink->sample_spec.format = PA_SAMPLE_S16BE;
else if (depth == 8 && !sign && !strcmp (n, "audio/x-raw-int"))
polypsink->sample_spec.format = PA_SAMPLE_U8;
else if (depth == 32 && endianness == 1234
&& !strcmp (n, "audio/x-raw-float"))
polypsink->sample_spec.format = PA_SAMPLE_FLOAT32LE;
else if (depth == 32 && endianness == 4321
&& !strcmp (n, "audio/x-raw-float"))
polypsink->sample_spec.format = PA_SAMPLE_FLOAT32LE;
else
return GST_PAD_LINK_REFUSED;
polypsink->sample_spec.rate = 44100;
polypsink->sample_spec.channels = 2;
pa_sample_spec_snprint (t, sizeof (t), &polypsink->sample_spec);
gst_structure_get_int (structure, "channels",
(int *) &polypsink->sample_spec.channels);
gst_structure_get_int (structure, "rate", &polypsink->sample_spec.rate);
pa_sample_spec_snprint (t, sizeof (t), &polypsink->sample_spec);
if (!pa_sample_spec_valid (&polypsink->sample_spec))
return GST_PAD_LINK_REFUSED;
polypsink->negotiated = 1;
destroy_stream (polypsink);
state = gst_element_get_state (GST_ELEMENT (polypsink));
if (state == GST_STATE_PAUSED || state == GST_STATE_PLAYING)
create_stream (polypsink);
return GST_PAD_LINK_OK;
}
static GstCaps *
gst_polypsink_sink_fixate (GstPad * pad, const GstCaps * caps)
{
GstCaps *newcaps;
GstStructure *structure;
newcaps =
gst_caps_new_full (gst_structure_copy (gst_caps_get_structure (caps, 0)),
NULL);
structure = gst_caps_get_structure (newcaps, 0);
if (gst_caps_structure_fixate_field_nearest_int (structure, "rate", 44100) ||
gst_caps_structure_fixate_field_nearest_int (structure, "depth", 16) ||
gst_caps_structure_fixate_field_nearest_int (structure, "width", 16) ||
gst_caps_structure_fixate_field_nearest_int (structure, "channels", 2))
return newcaps;
gst_caps_free (newcaps);
return NULL;
}
static void
gst_polypsink_init (GTypeInstance * instance, gpointer g_class)
{
GstPolypSink *polypsink = GST_POLYPSINK (instance);
polypsink->sinkpad =
gst_pad_new_from_template (gst_element_class_get_pad_template
(GST_ELEMENT_GET_CLASS (instance), "sink"), "sink");
gst_element_add_pad (GST_ELEMENT (polypsink), polypsink->sinkpad);
gst_pad_set_chain_function (polypsink->sinkpad, gst_polypsink_chain);
gst_pad_set_link_function (polypsink->sinkpad, gst_polypsink_link);
gst_pad_set_fixate_function (polypsink->sinkpad, gst_polypsink_sink_fixate);
/* GST_FLAG_SET(polypsink, GST_ELEMENT_THREAD_SUGGESTED); */
GST_FLAG_SET (polypsink, GST_ELEMENT_EVENT_AWARE);
polypsink->context = NULL;
polypsink->stream = NULL;
polypsink->mainloop = pa_mainloop_new ();
g_assert (polypsink->mainloop);
polypsink->mainloop_api = pa_mainloop_get_api (polypsink->mainloop);
polypsink->sample_spec.rate = 0;
polypsink->sample_spec.channels = 0;
polypsink->sample_spec.format = 0;
polypsink->negotiated = 0;
polypsink->buffer = NULL;
polypsink->buffer_index = 0;
polypsink->latency = 0;
polypsink->counter = 0;
}
static void
gst_polypsink_dispose (GObject * object)
{
GstPolypSink *polypsink = GST_POLYPSINK (object);
/* gst_object_unparent(GST_OBJECT(polypsink->provided_clock)); */
destroy_context (polypsink);
if (polypsink->buffer)
gst_buffer_unref (polypsink->buffer);
g_free (polypsink->server);
g_free (polypsink->sink);
pa_mainloop_free (polypsink->mainloop);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_polypsink_class_init (gpointer g_class, gpointer class_data)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (g_class);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
parent_class = g_type_class_peek_parent (g_class);
g_object_class_install_property (gobject_class, ARG_SERVER,
g_param_spec_string ("server", "server", "server", NULL,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_SINK,
g_param_spec_string ("sink", "sink", "sink", NULL, G_PARAM_READWRITE));
gobject_class->set_property = gst_polypsink_set_property;
gobject_class->get_property = gst_polypsink_get_property;
gobject_class->dispose = gst_polypsink_dispose;
gstelement_class->change_state = gst_polypsink_change_state;
/* gstelement_class->set_clock = gst_polypsink_set_clock; */
/* gstelement_class->get_clock = gst_polypsink_get_clock; */
}
gboolean
gst_polypsink_factory_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "polypsink", GST_RANK_NONE,
GST_TYPE_POLYPSINK);
}
GType
gst_polypsink_get_type (void)
{
static GType polypsink_type = 0;
if (!polypsink_type) {
static const GTypeInfo polypsink_info = {
sizeof (GstPolypSinkClass),
gst_polypsink_base_init,
NULL,
gst_polypsink_class_init,
NULL,
NULL,
sizeof (GstPolypSink),
0,
gst_polypsink_init,
};
polypsink_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstPolypSink",
&polypsink_info, 0);
}
return polypsink_type;
}