static gboolean
gst_openal_sink_prepare (GstAudioSink * audiosink,
GstAudioRingBufferSpec * spec)
{
GstOpenALSink *sink = GST_OPENAL_SINK (audiosink);
ALCcontext *context, *old;
if (sink->default_context && !gst_openal_sink_unprepare (audiosink))
return FALSE;
if (sink->user_context)
context = sink->user_context;
else {
ALCint attribs[3] = { 0, 0, 0 };
/* Don't try to change the playback frequency of an app's device */
if (!sink->user_device) {
attribs[0] = ALC_FREQUENCY;
attribs[1] = GST_AUDIO_INFO_RATE (&spec->info);
attribs[2] = 0;
}
context = alcCreateContext (sink->default_device, attribs);
if (!context) {
GST_ELEMENT_ERROR (sink, RESOURCE, FAILED,
("Unable to prepare device."), GST_ALC_ERROR (sink->default_device));
return FALSE;
}
}
old = pushContext (context);
if (sink->user_source) {
if (!sink->user_context || !alIsSource (sink->user_source)) {
GST_ELEMENT_ERROR (sink, RESOURCE, NOT_FOUND, (NULL),
("Invalid source specified for context"));
goto fail;
}
sink->default_source = sink->user_source;
} else {
ALuint source;
alGenSources (1, &source);
if (checkALError () != AL_NO_ERROR) {
GST_ELEMENT_ERROR (sink, RESOURCE, NO_SPACE_LEFT, (NULL),
("Unable to generate source"));
goto fail;
}
sink->default_source = source;
}
gst_openal_sink_parse_spec (sink, spec);
if (sink->format == AL_NONE) {
GST_ELEMENT_ERROR (sink, RESOURCE, SETTINGS, (NULL),
("Unable to get type %d, format %d, and %d channels", spec->type,
GST_AUDIO_INFO_FORMAT (&spec->info),
GST_AUDIO_INFO_CHANNELS (&spec->info)));
goto fail;
}
sink->buffers = g_malloc (sink->buffer_count * sizeof (*sink->buffers));
if (!sink->buffers) {
GST_ELEMENT_ERROR (sink, RESOURCE, FAILED, ("Out of memory."),
("Unable to allocate buffers"));
goto fail;
}
alGenBuffers (sink->buffer_count, sink->buffers);
if (checkALError () != AL_NO_ERROR) {
GST_ELEMENT_ERROR (sink, RESOURCE, NO_SPACE_LEFT, (NULL),
("Unable to generate %d buffers", sink->buffer_count));
goto fail;
}
sink->buffer_idx = 0;
popContext (old, context);
sink->default_context = context;
return TRUE;
fail:
if (!sink->user_source && sink->default_source)
alDeleteSources (1, &sink->default_source);
sink->default_source = 0;
g_free (sink->buffers);
sink->buffers = NULL;
sink->buffer_count = 0;
sink->buffer_length = 0;
popContext (old, context);
if (!sink->user_context)
alcDestroyContext (context);
return FALSE;
}
static gboolean
gst_openal_sink_prepare (GstAudioSink * asink, GstRingBufferSpec * spec)
{
GstOpenALSink *openal = GST_OPENAL_SINK (asink);
ALCcontext *ctx, *old;
if (openal->context && !gst_openal_sink_unprepare (asink))
return FALSE;
if (openal->custom_ctx)
ctx = openal->custom_ctx;
else {
ALCint attribs[3] = { 0, 0, 0 };
/* Don't try to change the playback frequency of an app's device */
if (!openal->custom_dev) {
attribs[0] = ALC_FREQUENCY;
attribs[1] = spec->rate;
attribs[2] = 0;
}
ctx = alcCreateContext (openal->device, attribs);
if (!ctx) {
GST_ELEMENT_ERROR (openal, RESOURCE, FAILED,
("Unable to prepare device."), GST_ALC_ERROR (openal->device));
return FALSE;
}
}
old = pushContext (ctx);
if (openal->custom_sID) {
if (!openal->custom_ctx || !alIsSource (openal->custom_sID)) {
GST_ELEMENT_ERROR (openal, RESOURCE, NOT_FOUND, (NULL),
("Invalid source ID specified for context"));
goto fail;
}
openal->sID = openal->custom_sID;
} else {
ALuint sourceID;
alGenSources (1, &sourceID);
if (checkALError () != AL_NO_ERROR) {
GST_ELEMENT_ERROR (openal, RESOURCE, NO_SPACE_LEFT, (NULL),
("Unable to generate source"));
goto fail;
}
openal->sID = sourceID;
}
gst_openal_sink_parse_spec (openal, spec);
if (openal->format == AL_NONE) {
GST_ELEMENT_ERROR (openal, RESOURCE, SETTINGS, (NULL),
("Unable to get type %d, format %d, and %d channels",
spec->type, spec->format, spec->channels));
goto fail;
}
openal->bIDs = g_malloc (openal->bID_count * sizeof (*openal->bIDs));
if (!openal->bIDs) {
GST_ELEMENT_ERROR (openal, RESOURCE, FAILED, ("Out of memory."),
("Unable to allocate buffer IDs"));
goto fail;
}
alGenBuffers (openal->bID_count, openal->bIDs);
if (checkALError () != AL_NO_ERROR) {
GST_ELEMENT_ERROR (openal, RESOURCE, NO_SPACE_LEFT, (NULL),
("Unable to generate %d buffers", openal->bID_count));
goto fail;
}
openal->bID_idx = 0;
popContext (old, ctx);
openal->context = ctx;
return TRUE;
fail:
if (!openal->custom_sID && openal->sID)
alDeleteSources (1, &openal->sID);
openal->sID = 0;
g_free (openal->bIDs);
openal->bIDs = NULL;
openal->bID_count = 0;
openal->bID_length = 0;
popContext (old, ctx);
if (!openal->custom_ctx)
alcDestroyContext (ctx);
return FALSE;
}
