static gboolean
gst_dtmf_src_send_event (GstElement * element, GstEvent * event)
{
GstDTMFSrc *dtmfsrc = GST_DTMF_SRC (element);
gboolean ret;
GST_LOG_OBJECT (dtmfsrc, "Received an %s event via send_event",
GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CUSTOM_BOTH:
case GST_EVENT_CUSTOM_BOTH_OOB:
case GST_EVENT_CUSTOM_UPSTREAM:
case GST_EVENT_CUSTOM_DOWNSTREAM:
case GST_EVENT_CUSTOM_DOWNSTREAM_OOB:
if (gst_event_has_name (event, "dtmf-event")) {
ret = gst_dtmf_src_handle_dtmf_event (dtmfsrc, event);
break;
}
/* fall through */
default:
ret = GST_ELEMENT_CLASS (parent_class)->send_event (element, event);
break;
}
return ret;
}
static gboolean
gst_dtmf_src_handle_event (GstBaseSrc * src, GstEvent * event)
{
GstDTMFSrc *dtmfsrc;
gboolean result = FALSE;
dtmfsrc = GST_DTMF_SRC (src);
GST_LOG_OBJECT (dtmfsrc, "Received an %s event on the src pad",
GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CUSTOM_UPSTREAM:
if (gst_event_has_name (event, "dtmf-event")) {
result = gst_dtmf_src_handle_dtmf_event (dtmfsrc, event);
break;
}
/* fall through */
default:
result = GST_BASE_SRC_CLASS (parent_class)->event (src, event);
break;
}
return result;
}
static gboolean
gst_dtmf_src_negotiate (GstBaseSrc * basesrc)
{
GstDTMFSrc *dtmfsrc = GST_DTMF_SRC (basesrc);
GstCaps *caps;
GstStructure *s;
gboolean ret;
caps = gst_pad_get_allowed_caps (GST_BASE_SRC_PAD (basesrc));
if (!caps)
caps =
gst_caps_copy (gst_pad_get_pad_template_caps (GST_BASE_SRC_PAD
(basesrc)));
if (gst_caps_is_empty (caps))
return FALSE;
gst_caps_truncate (caps);
s = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (s, "rate", DEFAULT_SAMPLE_RATE);
if (!gst_structure_get_int (s, "rate", &dtmfsrc->sample_rate)) {
GST_ERROR_OBJECT (dtmfsrc, "Could not get rate");
gst_caps_unref (caps);
return FALSE;
}
ret = gst_pad_set_caps (GST_BASE_SRC_PAD (basesrc), caps);
gst_caps_unref (caps);
return ret;
}
static gboolean
gst_dtmf_src_unlock_stop (GstBaseSrc * src)
{
GstDTMFSrc *dtmfsrc = GST_DTMF_SRC (src);
GST_DEBUG_OBJECT (dtmfsrc, "Unlock stopped");
GST_OBJECT_LOCK (dtmfsrc);
dtmfsrc->paused = FALSE;
GST_OBJECT_UNLOCK (dtmfsrc);
return TRUE;
}
static void
gst_dtmf_src_finalize (GObject * object)
{
GstDTMFSrc *dtmfsrc;
dtmfsrc = GST_DTMF_SRC (object);
if (dtmfsrc->event_queue) {
g_async_queue_unref (dtmfsrc->event_queue);
dtmfsrc->event_queue = NULL;
}
G_OBJECT_CLASS (gst_dtmf_src_parent_class)->finalize (object);
}
static gboolean
gst_dtmf_src_handle_event (GstBaseSrc * src, GstEvent * event)
{
GstDTMFSrc *dtmfsrc;
gboolean result = FALSE;
dtmfsrc = GST_DTMF_SRC (src);
GST_DEBUG_OBJECT (dtmfsrc, "Received an event on the src pad");
if (GST_EVENT_TYPE (event) == GST_EVENT_CUSTOM_UPSTREAM) {
result = gst_dtmf_src_handle_custom_upstream (dtmfsrc, event);
}
return result;
}
static void
gst_dtmf_src_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstDTMFSrc *dtmfsrc;
dtmfsrc = GST_DTMF_SRC (object);
switch (prop_id) {
case PROP_INTERVAL:
g_value_set_uint (value, dtmfsrc->interval);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_dtmf_src_unlock (GstBaseSrc * src)
{
GstDTMFSrc *dtmfsrc = GST_DTMF_SRC (src);
GstDTMFSrcEvent *event = NULL;
GST_DEBUG_OBJECT (dtmfsrc, "Called unlock");
GST_OBJECT_LOCK (dtmfsrc);
dtmfsrc->paused = TRUE;
if (dtmfsrc->clockid) {
gst_clock_id_unschedule (dtmfsrc->clockid);
}
GST_OBJECT_UNLOCK (dtmfsrc);
GST_DEBUG_OBJECT (dtmfsrc, "Pushing the PAUSE_TASK event on unlock request");
event = g_slice_new0 (GstDTMFSrcEvent);
event->event_type = DTMF_EVENT_TYPE_PAUSE_TASK;
g_async_queue_push (dtmfsrc->event_queue, event);
return TRUE;
}
static GstStateChangeReturn
gst_dtmf_src_change_state (GstElement * element, GstStateChange transition)
{
GstDTMFSrc *dtmfsrc;
GstStateChangeReturn result;
gboolean no_preroll = FALSE;
GstDTMFSrcEvent *event = NULL;
dtmfsrc = GST_DTMF_SRC (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
/* Flushing the event queue */
event = g_async_queue_try_pop (dtmfsrc->event_queue);
while (event != NULL) {
gst_dtmf_src_post_message (dtmfsrc, "dtmf-event-dropped", event);
g_slice_free (GstDTMFSrcEvent, event);
event = g_async_queue_try_pop (dtmfsrc->event_queue);
}
dtmfsrc->last_event_was_start = FALSE;
dtmfsrc->timestamp = 0;
no_preroll = TRUE;
break;
default:
break;
}
if ((result =
GST_ELEMENT_CLASS (gst_dtmf_src_parent_class)->change_state (element,
transition)) == GST_STATE_CHANGE_FAILURE)
goto failure;
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
no_preroll = TRUE;
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
GST_DEBUG_OBJECT (dtmfsrc, "Flushing event queue");
/* Flushing the event queue */
event = g_async_queue_try_pop (dtmfsrc->event_queue);
while (event != NULL) {
gst_dtmf_src_post_message (dtmfsrc, "dtmf-event-dropped", event);
g_slice_free (GstDTMFSrcEvent, event);
event = g_async_queue_try_pop (dtmfsrc->event_queue);
}
dtmfsrc->last_event_was_start = FALSE;
break;
default:
break;
}
if (no_preroll && result == GST_STATE_CHANGE_SUCCESS)
result = GST_STATE_CHANGE_NO_PREROLL;
return result;
/* ERRORS */
failure:
{
GST_ERROR_OBJECT (dtmfsrc, "parent failed state change");
return result;
}
}
static GstFlowReturn
gst_dtmf_src_create (GstBaseSrc * basesrc, guint64 offset,
guint length, GstBuffer ** buffer)
{
GstBuffer *buf = NULL;
GstDTMFSrcEvent *event;
GstDTMFSrc *dtmfsrc;
GstClock *clock;
GstClockID *clockid;
GstClockReturn clockret;
dtmfsrc = GST_DTMF_SRC (basesrc);
do {
if (dtmfsrc->last_event == NULL) {
GST_DEBUG_OBJECT (dtmfsrc, "popping");
event = g_async_queue_pop (dtmfsrc->event_queue);
GST_DEBUG_OBJECT (dtmfsrc, "popped %d", event->event_type);
switch (event->event_type) {
case DTMF_EVENT_TYPE_STOP:
GST_WARNING_OBJECT (dtmfsrc,
"Received a DTMF stop event when already stopped");
gst_dtmf_src_post_message (dtmfsrc, "dtmf-event-dropped", event);
break;
case DTMF_EVENT_TYPE_START:
gst_dtmf_prepare_timestamps (dtmfsrc);
event->packet_count = 0;
dtmfsrc->last_event = event;
event = NULL;
gst_dtmf_src_post_message (dtmfsrc, "dtmf-event-processed",
dtmfsrc->last_event);
break;
case DTMF_EVENT_TYPE_PAUSE_TASK:
/*
* We're pushing it back because it has to stay in there until
* the task is really paused (and the queue will then be flushed)
*/
GST_DEBUG_OBJECT (dtmfsrc, "pushing pause_task...");
GST_OBJECT_LOCK (dtmfsrc);
if (dtmfsrc->paused) {
g_async_queue_push (dtmfsrc->event_queue, event);
goto paused_locked;
}
GST_OBJECT_UNLOCK (dtmfsrc);
break;
}
if (event)
g_slice_free (GstDTMFSrcEvent, event);
} else if (dtmfsrc->last_event->packet_count * dtmfsrc->interval >=
MIN_DUTY_CYCLE) {
event = g_async_queue_try_pop (dtmfsrc->event_queue);
if (event != NULL) {
switch (event->event_type) {
case DTMF_EVENT_TYPE_START:
GST_WARNING_OBJECT (dtmfsrc,
"Received two consecutive DTMF start events");
gst_dtmf_src_post_message (dtmfsrc, "dtmf-event-dropped", event);
break;
case DTMF_EVENT_TYPE_STOP:
g_slice_free (GstDTMFSrcEvent, dtmfsrc->last_event);
dtmfsrc->last_event = NULL;
gst_dtmf_src_post_message (dtmfsrc, "dtmf-event-processed", event);
break;
case DTMF_EVENT_TYPE_PAUSE_TASK:
/*
* We're pushing it back because it has to stay in there until
* the task is really paused (and the queue will then be flushed)
*/
GST_DEBUG_OBJECT (dtmfsrc, "pushing pause_task...");
GST_OBJECT_LOCK (dtmfsrc);
if (dtmfsrc->paused) {
g_async_queue_push (dtmfsrc->event_queue, event);
goto paused_locked;
}
GST_OBJECT_UNLOCK (dtmfsrc);
break;
}
g_slice_free (GstDTMFSrcEvent, event);
}
}
} while (dtmfsrc->last_event == NULL);
GST_LOG_OBJECT (dtmfsrc, "end event check, now wait for the proper time");
clock = gst_element_get_clock (GST_ELEMENT (basesrc));
clockid = gst_clock_new_single_shot_id (clock, dtmfsrc->timestamp +
gst_element_get_base_time (GST_ELEMENT (dtmfsrc)));
gst_object_unref (clock);
GST_OBJECT_LOCK (dtmfsrc);
if (!dtmfsrc->paused) {
dtmfsrc->clockid = clockid;
GST_OBJECT_UNLOCK (dtmfsrc);
clockret = gst_clock_id_wait (clockid, NULL);
GST_OBJECT_LOCK (dtmfsrc);
if (dtmfsrc->paused)
clockret = GST_CLOCK_UNSCHEDULED;
} else {
clockret = GST_CLOCK_UNSCHEDULED;
}
gst_clock_id_unref (clockid);
dtmfsrc->clockid = NULL;
GST_OBJECT_UNLOCK (dtmfsrc);
if (clockret == GST_CLOCK_UNSCHEDULED) {
goto paused;
}
buf = gst_dtmf_src_create_next_tone_packet (dtmfsrc, dtmfsrc->last_event);
GST_LOG_OBJECT (dtmfsrc, "Created buffer of size %" G_GSIZE_FORMAT,
gst_buffer_get_size (buf));
*buffer = buf;
return GST_FLOW_OK;
paused_locked:
GST_OBJECT_UNLOCK (dtmfsrc);
paused:
if (dtmfsrc->last_event) {
GST_DEBUG_OBJECT (dtmfsrc, "Stopping current event");
/* Don't forget to release the stream lock */
g_slice_free (GstDTMFSrcEvent, dtmfsrc->last_event);
dtmfsrc->last_event = NULL;
}
return GST_FLOW_FLUSHING;
}
