static GstStateChangeReturn
gst_monoscope_change_state (GstElement * element, GstStateChange transition)
{
GstMonoscope *monoscope = GST_MONOSCOPE (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_monoscope_reset (monoscope);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
static GstStateChangeReturn
gst_monoscope_change_state (GstElement * element, GstStateChange transition)
{
GstMonoscope *monoscope = GST_MONOSCOPE (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_monoscope_reset (monoscope);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (monoscope->pool) {
gst_buffer_pool_set_active (monoscope->pool, FALSE);
gst_object_replace ((GstObject **) & monoscope->pool, NULL);
}
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
static gboolean
gst_monoscope_src_setcaps (GstPad * pad, GstCaps * caps)
{
GstMonoscope *monoscope = GST_MONOSCOPE (GST_PAD_PARENT (pad));
GstStructure *structure;
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "width", &monoscope->width);
gst_structure_get_int (structure, "height", &monoscope->height);
gst_structure_get_fraction (structure, "framerate", &monoscope->fps_num,
&monoscope->fps_denom);
monoscope->outsize = monoscope->width * monoscope->height * 4;
monoscope->frame_duration = gst_util_uint64_scale_int (GST_SECOND,
monoscope->fps_denom, monoscope->fps_num);
monoscope->spf =
gst_util_uint64_scale_int (monoscope->rate, monoscope->fps_denom,
monoscope->fps_num);
GST_DEBUG_OBJECT (monoscope, "dimension %dx%d, framerate %d/%d, spf %d",
monoscope->width, monoscope->height, monoscope->fps_num,
monoscope->fps_denom, monoscope->spf);
if (monoscope->visstate) {
monoscope_close (monoscope->visstate);
monoscope->visstate = NULL;
}
monoscope->visstate = monoscope_init (monoscope->width, monoscope->height);
return (monoscope->visstate != NULL);
}
static void
gst_monoscope_finalize (GObject * object)
{
GstMonoscope *monoscope = GST_MONOSCOPE (object);
if (monoscope->visstate)
monoscope_close (monoscope->visstate);
g_object_unref (monoscope->adapter);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_monoscope_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstMonoscope *monoscope = GST_MONOSCOPE (GST_PAD_PARENT (pad));
GstStructure *structure;
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "rate", &monoscope->rate);
GST_DEBUG_OBJECT (monoscope, "sample rate = %d", monoscope->rate);
return TRUE;
}
static gboolean
gst_monoscope_sink_event (GstPad * pad, GstEvent * event)
{
GstMonoscope *monoscope;
gboolean res;
monoscope = GST_MONOSCOPE (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
res = gst_pad_push_event (monoscope->srcpad, event);
break;
case GST_EVENT_FLUSH_STOP:
gst_monoscope_reset (monoscope);
res = gst_pad_push_event (monoscope->srcpad, event);
break;
case GST_EVENT_NEWSEGMENT:
{
GstFormat format;
gdouble rate, arate;
gint64 start, stop, time;
gboolean update;
/* the newsegment values are used to clip the input samples
* and to convert the incomming timestamps to running time so
* we can do QoS */
gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
&start, &stop, &time);
/* now configure the values */
gst_segment_set_newsegment_full (&monoscope->segment, update,
rate, arate, format, start, stop, time);
res = gst_pad_push_event (monoscope->srcpad, event);
break;
}
default:
res = gst_pad_push_event (monoscope->srcpad, event);
break;
}
gst_object_unref (monoscope);
return res;
}
static gboolean
gst_monoscope_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstMonoscope *monoscope;
gboolean res;
monoscope = GST_MONOSCOPE (parent);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
res = gst_pad_push_event (monoscope->srcpad, event);
break;
case GST_EVENT_FLUSH_STOP:
gst_monoscope_reset (monoscope);
res = gst_pad_push_event (monoscope->srcpad, event);
break;
case GST_EVENT_SEGMENT:
{
/* the newsegment values are used to clip the input samples
* and to convert the incomming timestamps to running time so
* we can do QoS */
gst_event_copy_segment (event, &monoscope->segment);
res = gst_pad_push_event (monoscope->srcpad, event);
break;
}
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
gst_monoscope_sink_setcaps (monoscope, caps);
gst_event_unref (event);
res = TRUE;
break;
}
default:
res = gst_pad_push_event (monoscope->srcpad, event);
break;
}
return res;
}
static gboolean
gst_monoscope_src_event (GstPad * pad, GstEvent * event)
{
GstMonoscope *monoscope;
gboolean res;
monoscope = GST_MONOSCOPE (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_QOS:{
gdouble proportion;
GstClockTimeDiff diff;
GstClockTime timestamp;
gst_event_parse_qos (event, &proportion, &diff, ×tamp);
/* save stuff for the _chain() function */
GST_OBJECT_LOCK (monoscope);
monoscope->proportion = proportion;
if (diff >= 0)
/* we're late, this is a good estimate for next displayable
* frame (see part-qos.txt) */
monoscope->earliest_time =
timestamp + 2 * diff + monoscope->frame_duration;
else
monoscope->earliest_time = timestamp + diff;
GST_OBJECT_UNLOCK (monoscope);
res = gst_pad_push_event (monoscope->sinkpad, event);
break;
}
default:
res = gst_pad_push_event (monoscope->sinkpad, event);
break;
}
gst_object_unref (monoscope);
return res;
}
static GstFlowReturn
gst_monoscope_chain (GstPad * pad, GstObject * parent, GstBuffer * inbuf)
{
GstFlowReturn flow_ret = GST_FLOW_OK;
GstMonoscope *monoscope;
monoscope = GST_MONOSCOPE (parent);
if (monoscope->rate == 0) {
gst_buffer_unref (inbuf);
flow_ret = GST_FLOW_NOT_NEGOTIATED;
goto out;
}
/* Make sure have an output format */
flow_ret = ensure_negotiated (monoscope);
if (flow_ret != GST_FLOW_OK) {
gst_buffer_unref (inbuf);
goto out;
}
/* don't try to combine samples from discont buffer */
if (GST_BUFFER_FLAG_IS_SET (inbuf, GST_BUFFER_FLAG_DISCONT)) {
gst_adapter_clear (monoscope->adapter);
monoscope->next_ts = GST_CLOCK_TIME_NONE;
}
/* Match timestamps from the incoming audio */
if (GST_BUFFER_TIMESTAMP (inbuf) != GST_CLOCK_TIME_NONE)
monoscope->next_ts = GST_BUFFER_TIMESTAMP (inbuf);
GST_LOG_OBJECT (monoscope, "in buffer has %d samples, ts=%" GST_TIME_FORMAT,
gst_buffer_get_size (inbuf) / monoscope->bps,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (inbuf)));
gst_adapter_push (monoscope->adapter, inbuf);
inbuf = NULL;
/* Collect samples until we have enough for an output frame */
while (flow_ret == GST_FLOW_OK) {
gint16 *samples;
GstBuffer *outbuf = NULL;
guint32 *pixels, avail, bytesperframe;
avail = gst_adapter_available (monoscope->adapter);
GST_LOG_OBJECT (monoscope, "bytes avail now %u", avail);
bytesperframe = monoscope->spf * monoscope->bps;
if (avail < bytesperframe)
break;
/* FIXME: something is wrong with QoS, we are skipping way too much
* stuff even with very low CPU loads */
#if 0
if (monoscope->next_ts != -1) {
gboolean need_skip;
gint64 qostime;
qostime = gst_segment_to_running_time (&monoscope->segment,
GST_FORMAT_TIME, monoscope->next_ts);
GST_OBJECT_LOCK (monoscope);
/* check for QoS, don't compute buffers that are known to be late */
need_skip =
GST_CLOCK_TIME_IS_VALID (monoscope->earliest_time) &&
qostime <= monoscope->earliest_time;
GST_OBJECT_UNLOCK (monoscope);
if (need_skip) {
GST_WARNING_OBJECT (monoscope,
"QoS: skip ts: %" GST_TIME_FORMAT ", earliest: %" GST_TIME_FORMAT,
GST_TIME_ARGS (qostime), GST_TIME_ARGS (monoscope->earliest_time));
goto skip;
}
}
#endif
samples = (gint16 *) gst_adapter_map (monoscope->adapter, bytesperframe);
if (monoscope->spf < 512) {
gint16 in_data[512], i;
for (i = 0; i < 512; ++i) {
gdouble off;
off = ((gdouble) i * (gdouble) monoscope->spf) / 512.0;
in_data[i] = samples[MIN ((guint) off, monoscope->spf)];
}
pixels = monoscope_update (monoscope->visstate, in_data);
} else {
/* not really correct, but looks much prettier */
pixels = monoscope_update (monoscope->visstate, samples);
}
GST_LOG_OBJECT (monoscope, "allocating output buffer");
flow_ret = gst_buffer_pool_acquire_buffer (monoscope->pool, &outbuf, NULL);
if (flow_ret != GST_FLOW_OK) {
gst_adapter_unmap (monoscope->adapter);
goto out;
}
gst_buffer_fill (outbuf, 0, pixels, monoscope->outsize);
GST_BUFFER_TIMESTAMP (outbuf) = monoscope->next_ts;
GST_BUFFER_DURATION (outbuf) = monoscope->frame_duration;
flow_ret = gst_pad_push (monoscope->srcpad, outbuf);
#if 0
skip:
#endif
if (GST_CLOCK_TIME_IS_VALID (monoscope->next_ts))
monoscope->next_ts += monoscope->frame_duration;
gst_adapter_flush (monoscope->adapter, bytesperframe);
}
out:
return flow_ret;
}
