static gboolean
gst_gme_dec_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstGmeDec *gme = GST_GME_DEC (parent);
gboolean result = TRUE;
gboolean forward = FALSE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
/* we get EOS when we loaded the complete file, now try to initialize the
* decoding */
if (!(result = gme_setup (gme))) {
/* can't start, post an ERROR and push EOS downstream */
GST_ELEMENT_ERROR (gme, STREAM, DEMUX, (NULL),
("can't start playback"));
forward = TRUE;
}
break;
case GST_EVENT_CAPS:
case GST_EVENT_SEGMENT:
break;
default:
forward = TRUE;
break;
}
if (forward)
result = gst_pad_push_event (gme->srcpad, event);
else
gst_event_unref (event);
return result;
}
static GstStateChangeReturn
gst_gme_dec_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn result;
GstGmeDec *dec;
dec = GST_GME_DEC (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
dec->total_duration = GST_CLOCK_TIME_NONE;
break;
default:
break;
}
result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (result == GST_STATE_CHANGE_FAILURE)
return result;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_adapter_clear (dec->adapter);
if (dec->player) {
gme_delete (dec->player);
dec->player = NULL;
}
break;
default:
break;
}
return result;
}
static void
gst_gme_play (GstPad * pad)
{
GstGmeDec *gme = GST_GME_DEC (gst_pad_get_parent (pad));
GstFlowReturn flow_return;
GstBuffer *out;
gboolean seeking = gme->seeking;
gme_err_t gme_err = NULL;
const int NUM_SAMPLES = 1600; /* 4 bytes (stereo 16-bit) per sample */
if (!seeking) {
GstMapInfo map;
out = gst_buffer_new_and_alloc (NUM_SAMPLES * 4);
GST_BUFFER_TIMESTAMP (out) = gme_tell (gme->player) * GST_MSECOND;
gst_buffer_map (out, &map, GST_MAP_WRITE);
gme_err = gme_play (gme->player, NUM_SAMPLES * 2, (short *) map.data);
gst_buffer_unmap (out, &map);
if (gme_err) {
GST_ELEMENT_ERROR (gme, STREAM, DEMUX, (NULL), ("%s", gme_err));
gst_pad_pause_task (pad);
gst_pad_push_event (pad, gst_event_new_eos ());
gst_object_unref (gme);
return;
}
} else {
gme_seek (gme->player, gme->seekpoint);
gme->seeking = FALSE;
out = gst_buffer_new ();
}
if ((flow_return = gst_pad_push (gme->srcpad, out)) != GST_FLOW_OK) {
GST_DEBUG_OBJECT (gme, "pausing task, reason %s",
gst_flow_get_name (flow_return));
gst_pad_pause_task (pad);
if (flow_return == GST_FLOW_EOS) {
gst_pad_push_event (pad, gst_event_new_eos ());
} else if (flow_return < GST_FLOW_EOS || flow_return == GST_FLOW_NOT_LINKED) {
GST_ELEMENT_ERROR (gme, STREAM, FAILED, ("Internal data stream error."),
("stream stopped, reason %s", gst_flow_get_name (flow_return)));
gst_pad_push_event (pad, gst_event_new_eos ());
}
}
if (gme_tell (gme->player) * GST_MSECOND > gme->total_duration) {
gst_pad_pause_task (pad);
gst_pad_push_event (pad, gst_event_new_eos ());
}
gst_object_unref (gme);
return;
}
static GstFlowReturn
gst_gme_dec_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
{
GstGmeDec *gme = GST_GME_DEC (parent);
/* Accumulate GME data until end-of-stream, then commence playback. */
gst_adapter_push (gme->adapter, buffer);
return GST_FLOW_OK;
}
static void
gst_gme_dec_dispose (GObject * object)
{
GstGmeDec *gme = GST_GME_DEC (object);
if (gme->adapter) {
g_object_unref (gme->adapter);
gme->adapter = NULL;
}
GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
}
static gboolean
gst_gme_dec_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstGmeDec *gme = GST_GME_DEC (parent);
gboolean result = TRUE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_DURATION:
{
GstFormat format;
gst_query_parse_duration (query, &format, NULL);
if (!gme->initialized || format != GST_FORMAT_TIME
|| gme->total_duration == GST_CLOCK_TIME_NONE) {
result = FALSE;
break;
}
gst_query_set_duration (query, GST_FORMAT_TIME, gme->total_duration);
break;
}
case GST_QUERY_POSITION:
{
GstFormat format;
gst_query_parse_position (query, &format, NULL);
if (!gme->initialized || format != GST_FORMAT_TIME) {
result = FALSE;
break;
}
gst_query_set_position (query, GST_FORMAT_TIME,
(gint64) gme_tell (gme->player) * GST_MSECOND);
break;
}
default:
result = gst_pad_query_default (pad, parent, query);
break;
}
return result;
}
static gboolean
gst_gme_dec_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstGmeDec *gme = GST_GME_DEC (parent);
gboolean result = FALSE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
{
gdouble rate;
GstFormat format;
GstSeekFlags flags;
GstSeekType start_type, stop_type;
gint64 start, stop;
gboolean flush;
gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
&stop_type, &stop);
gst_event_unref (event);
if (format != GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (gme, "seeking is only supported in TIME format");
break;
}
if (start_type != GST_SEEK_TYPE_SET || stop_type != GST_SEEK_TYPE_NONE) {
GST_DEBUG_OBJECT (gme, "unsupported seek type");
break;
}
if (stop_type == GST_SEEK_TYPE_NONE)
stop = GST_CLOCK_TIME_NONE;
if (start_type == GST_SEEK_TYPE_SET) {
GstSegment seg;
guint64 cur = gme_tell (gme->player) * GST_MSECOND;
guint64 dest = (guint64) start;
if (gme->total_duration != GST_CLOCK_TIME_NONE)
dest = CLAMP (dest, 0, gme->total_duration);
else
dest = MAX (0, dest);
if (dest == cur)
break;
flush = (flags & GST_SEEK_FLAG_FLUSH) == GST_SEEK_FLAG_FLUSH;
if (flush) {
gst_pad_push_event (gme->srcpad, gst_event_new_flush_start ());
} else {
gst_pad_stop_task (gme->srcpad);
}
GST_PAD_STREAM_LOCK (gme->srcpad);
if (flags & GST_SEEK_FLAG_SEGMENT) {
gst_element_post_message (GST_ELEMENT (gme),
gst_message_new_segment_start (GST_OBJECT (gme), format, cur));
}
if (flush) {
gst_pad_push_event (gme->srcpad, gst_event_new_flush_stop (TRUE));
}
if (stop == GST_CLOCK_TIME_NONE
&& gme->total_duration != GST_CLOCK_TIME_NONE)
stop = gme->total_duration;
gst_segment_init (&seg, GST_FORMAT_TIME);
seg.rate = rate;
seg.start = dest;
seg.stop = stop;
seg.time = dest;
gst_pad_push_event (gme->srcpad, gst_event_new_segment (&seg));
gme->seekpoint = dest / GST_MSECOND; /* nsecs to msecs */
gme->seeking = TRUE;
gst_pad_start_task (gme->srcpad, (GstTaskFunction) gst_gme_play,
gme->srcpad, NULL);
GST_PAD_STREAM_UNLOCK (gme->srcpad);
result = TRUE;
}
break;
}
default:
result = gst_pad_push_event (gme->sinkpad, event);
break;
}
return result;
}