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#include "spice-pulse.h"
#include <assert.h>
#include <pulse/glib-mainloop.h>
#include <pulse/context.h>
#include <pulse/stream.h>
#include <pulse/sample.h>
#define SPICE_PULSE_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE((obj), SPICE_TYPE_PULSE, spice_pulse))
struct stream {
pa_sample_spec spec;
pa_stream *stream;
};
struct spice_pulse {
SpiceSession *session;
SpiceChannel *pchannel;
pa_glib_mainloop *mainloop;
pa_context *context;
struct stream playback;
};
G_DEFINE_TYPE(SpicePulse, spice_pulse, G_TYPE_OBJECT)
static const char *stream_state_names[] = {
[ PA_STREAM_UNCONNECTED ] = "unconnected",
[ PA_STREAM_CREATING ] = "creating",
[ PA_STREAM_READY ] = "ready",
[ PA_STREAM_FAILED ] = "failed",
[ PA_STREAM_TERMINATED ] = "terminated",
};
static const char *context_state_names[] = {
[ PA_CONTEXT_UNCONNECTED ] = "unconnected",
[ PA_CONTEXT_CONNECTING ] = "connecting",
[ PA_CONTEXT_AUTHORIZING ] = "authorizing",
[ PA_CONTEXT_SETTING_NAME ] = "setting_name",
[ PA_CONTEXT_READY ] = "ready",
[ PA_CONTEXT_FAILED ] = "failed",
[ PA_CONTEXT_TERMINATED ] = "terminated",
};
#define STATE_NAME(array, state) \
((state < G_N_ELEMENTS(array)) ? array[state] : NULL)
static void spice_pulse_finalize(GObject *obj)
{
G_OBJECT_CLASS(spice_pulse_parent_class)->finalize(obj);
}
static void spice_pulse_init(SpicePulse *pulse)
{
spice_pulse *p;
p = pulse->priv = SPICE_PULSE_GET_PRIVATE(pulse);
memset(p, 0, sizeof(*p));
}
static void spice_pulse_class_init(SpicePulseClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
gobject_class->finalize = spice_pulse_finalize;
g_type_class_add_private(klass, sizeof(spice_pulse));
}
/* ------------------------------------------------------------------ */
static void playback_start(SpicePlaybackChannel *channel, gint format, gint channels,
gint frequency, gpointer data)
{
SpicePulse *pulse = data;
spice_pulse *p = SPICE_PULSE_GET_PRIVATE(pulse);
pa_context_state_t state;
state = pa_context_get_state(p->context);
switch (state) {
case PA_CONTEXT_READY:
if (p->playback.stream &&
(p->playback.spec.rate != frequency ||
p->playback.spec.channels != channels)) {
pa_stream_disconnect(p->playback.stream);
pa_stream_unref(p->playback.stream);
p->playback.stream = NULL;
}
if (p->playback.stream == NULL) {
assert(format == SPICE_AUDIO_FMT_S16);
p->playback.spec.format = PA_SAMPLE_S16LE;
p->playback.spec.rate = frequency;
p->playback.spec.channels = channels;
p->playback.stream = pa_stream_new(p->context, "playback",
&p->playback.spec, NULL);
pa_stream_connect_playback(p->playback.stream, NULL, NULL, 0, NULL, NULL);
}
if (pa_stream_is_corked(p->playback.stream)) {
pa_stream_cork(p->playback.stream, 0, NULL, NULL);
}
break;
default:
fprintf(stderr, "%s: pulse context not ready (%s)\n",
__FUNCTION__, STATE_NAME(context_state_names, state));
break;
}
}
static void playback_data(SpicePlaybackChannel *channel, gpointer *audio, gint size,
gpointer data)
{
SpicePulse *pulse = data;
spice_pulse *p = SPICE_PULSE_GET_PRIVATE(pulse);
pa_stream_state_t state;
if (!p->playback.stream)
return;
state = pa_stream_get_state(p->playback.stream);
switch (state) {
case PA_STREAM_READY:
pa_stream_write(p->playback.stream, audio, size, NULL, 0, PA_SEEK_RELATIVE);
break;
default:
fprintf(stderr, "%s: pulse playback stream not ready (%s)\n",
__FUNCTION__, STATE_NAME(stream_state_names, state));
break;
}
}
static void playback_stop(SpicePlaybackChannel *channel, gpointer data)
{
SpicePulse *pulse = data;
spice_pulse *p = pulse->priv;
if (!p->playback.stream)
return;
pa_stream_cork(p->playback.stream, 1, NULL, NULL);
}
static void channel_new(SpiceSession *s, SpiceChannel *channel, gpointer data)
{
SpicePulse *pulse = data;
spice_pulse *p = pulse->priv;
if (SPICE_IS_PLAYBACK_CHANNEL(channel)) {
p->pchannel = channel;
g_signal_connect(channel, "spice-playback-start",
G_CALLBACK(playback_start), pulse);
g_signal_connect(channel, "spice-playback-data",
G_CALLBACK(playback_data), pulse);
g_signal_connect(channel, "spice-playback-stop",
G_CALLBACK(playback_stop), pulse);
spice_channel_connect(channel);
}
}
SpicePulse *spice_pulse_new(SpiceSession *session, GMainLoop *mainloop,
const char *name)
{
SpicePulse *pulse;
spice_pulse *p;
SpiceChannel *channels[16];
int i, n;
pulse = g_object_new(SPICE_TYPE_PULSE, NULL);
p = SPICE_PULSE_GET_PRIVATE(pulse);
p->session = session;
g_signal_connect(session, "spice-session-channel-new",
G_CALLBACK(channel_new), pulse);
n = spice_session_get_channels(session, channels, SPICE_N_ELEMENTS(channels));
for (i = 0; i < n; i++) {
channel_new(session, channels[i], (gpointer*)pulse);
}
p->mainloop = pa_glib_mainloop_new(g_main_loop_get_context(mainloop));
p->context = pa_context_new(pa_glib_mainloop_get_api(p->mainloop), name);
pa_context_connect(p->context, NULL, 0, NULL);
return pulse;
}
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