static GstStateChangeReturn
gst_spc_dec_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn result;
GstSpcDec *dec;
dec = GST_SPC_DEC (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
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:
if (dec->buf) {
gst_buffer_unref (dec->buf);
dec->buf = NULL;
}
break;
default:
break;
}
return result;
}
static gboolean
gst_spc_dec_sink_event (GstPad * pad, GstEvent * event)
{
GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
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 = spc_setup (spc))) {
/* can't start, post an ERROR and push EOS downstream */
GST_ELEMENT_ERROR (spc, STREAM, DEMUX, (NULL),
("can't start playback"));
forward = TRUE;
}
break;
default:
break;
}
if (forward)
result = gst_pad_push_event (spc->srcpad, event);
else
gst_event_unref (event);
gst_object_unref (spc);
return result;
}
static void
gst_spc_dec_dispose (GObject * object)
{
GstSpcDec *spc = GST_SPC_DEC (object);
if (spc->buf) {
gst_buffer_unref (spc->buf);
spc->buf = NULL;
}
spc_tag_free (&spc->tag_info);
}
static void
gst_spc_dec_dispose (GObject * object)
{
GstSpcDec *spc = GST_SPC_DEC (object);
if (spc->buf) {
gst_buffer_unref (spc->buf);
spc->buf = NULL;
}
spc_tag_free (&spc->tag_info);
GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
}
static GstFlowReturn
gst_spc_dec_chain (GstPad * pad, GstBuffer * buffer)
{
GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
if (spc->buf) {
spc->buf = gst_buffer_join (spc->buf, buffer);
} else {
spc->buf = buffer;
}
gst_object_unref (spc);
return GST_FLOW_OK;
}
static gboolean
gst_spc_dec_src_query (GstPad * pad, GstQuery * query)
{
GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
gboolean result = TRUE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_DURATION:
{
GstFormat format;
gst_query_parse_duration (query, &format, NULL);
if (!spc->initialized || format != GST_FORMAT_TIME) {
result = FALSE;
break;
}
gst_query_set_duration (query, GST_FORMAT_TIME,
gst_spc_duration (spc) + gst_spc_fadeout (spc));
break;
}
case GST_QUERY_POSITION:
{
GstFormat format;
gst_query_parse_position (query, &format, NULL);
if (!spc->initialized || format != GST_FORMAT_TIME) {
result = FALSE;
break;
}
gst_query_set_position (query, GST_FORMAT_TIME,
(gint64) gst_util_uint64_scale (spc->byte_pos, GST_SECOND,
32000 * 2 * 2));
break;
}
default:
result = gst_pad_query_default (pad, query);
break;
}
gst_object_unref (spc);
return result;
}
static void
spc_play (GstPad * pad)
{
GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
GstFlowReturn flow_return;
GstBuffer *out;
gboolean seeking = spc->seeking;
gint64 duration, fade, end, position;
if (!seeking) {
out = gst_buffer_new_and_alloc (1600 * 4);
gst_buffer_set_caps (out, GST_PAD_CAPS (pad));
GST_BUFFER_TIMESTAMP (out) =
(gint64) gst_util_uint64_scale ((guint64) spc->byte_pos, GST_SECOND,
32000 * 2 * 2);
spc->byte_pos += OSPC_Run (-1, (short *) GST_BUFFER_DATA (out), 1600 * 4);
} else {
if (spc->seekpoint < spc->byte_pos) {
OSPC_Init (GST_BUFFER_DATA (spc->buf), GST_BUFFER_SIZE (spc->buf));
spc->byte_pos = 0;
}
spc->byte_pos += OSPC_Run (-1, NULL, 1600 * 4);
if (spc->byte_pos >= spc->seekpoint) {
spc->seeking = FALSE;
}
out = gst_buffer_new ();
gst_buffer_set_caps (out, GST_PAD_CAPS (pad));
}
duration = gst_spc_duration (spc);
fade = gst_spc_fadeout (spc);
end = duration + fade;
position =
(gint64) gst_util_uint64_scale ((guint64) spc->byte_pos, GST_SECOND,
32000 * 2 * 2);
if (position >= duration) {
gint16 *data = (gint16 *) GST_BUFFER_DATA (out);
guint32 size = GST_BUFFER_SIZE (out) / sizeof (gint16);
unsigned int i;
gint64 num = (fade - (position - duration));
for (i = 0; i < size; i++) {
/* Apply a parabolic volume envelope */
data[i] = (gint16) (data[i] * num / fade * num / fade);
}
}
if ((flow_return = gst_pad_push (spc->srcpad, out)) != GST_FLOW_OK) {
GST_DEBUG_OBJECT (spc, "pausing task, reason %s",
gst_flow_get_name (flow_return));
gst_pad_pause_task (pad);
if (GST_FLOW_IS_FATAL (flow_return) || flow_return == GST_FLOW_NOT_LINKED) {
gst_pad_push_event (pad, gst_event_new_eos ());
}
}
if (position >= end) {
gst_pad_pause_task (pad);
gst_pad_push_event (pad, gst_event_new_eos ());
}
gst_object_unref (spc);
return;
}
static gboolean
gst_spc_dec_src_event (GstPad * pad, GstEvent * event)
{
GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
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);
if (format != GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (spc, "seeking is only supported in TIME format");
break;
}
if (start_type != GST_SEEK_TYPE_SET || stop_type != GST_SEEK_TYPE_NONE) {
GST_DEBUG_OBJECT (spc, "unsupported seek type");
break;
}
if (stop_type == GST_SEEK_TYPE_NONE)
stop = GST_CLOCK_TIME_NONE;
if (start_type == GST_SEEK_TYPE_SET) {
guint64 cur =
gst_util_uint64_scale (spc->byte_pos, GST_SECOND, 32000 * 2 * 2);
guint64 dest = (guint64) start;
dest = CLAMP (dest, 0, gst_spc_duration (spc) + gst_spc_fadeout (spc));
if (dest == cur)
break;
flush = (flags & GST_SEEK_FLAG_FLUSH) == GST_SEEK_FLAG_FLUSH;
if (flush) {
gst_pad_push_event (spc->srcpad, gst_event_new_flush_start ());
} else {
gst_pad_stop_task (spc->srcpad);
}
GST_PAD_STREAM_LOCK (spc->srcpad);
if (flags & GST_SEEK_FLAG_SEGMENT) {
gst_element_post_message (GST_ELEMENT (spc),
gst_message_new_segment_start (GST_OBJECT (spc), format, cur));
}
if (flush) {
gst_pad_push_event (spc->srcpad, gst_event_new_flush_stop ());
}
if (stop == GST_CLOCK_TIME_NONE)
stop = (guint64) (gst_spc_duration (spc) + gst_spc_fadeout (spc));
gst_pad_push_event (spc->srcpad, gst_event_new_new_segment (FALSE, rate,
GST_FORMAT_TIME, dest, stop, dest));
/* spc->byte_pos += OSPC_Run(-1, NULL, (unsigned int) (gst_util_uint64_scale(dest - cur, 32000*2*2, GST_SECOND))); */
spc->seekpoint =
gst_util_uint64_scale (dest, 32000 * 2 * 2, GST_SECOND);
spc->seeking = TRUE;
gst_pad_start_task (spc->srcpad, (GstTaskFunction) spc_play,
spc->srcpad);
GST_PAD_STREAM_UNLOCK (spc->srcpad);
result = TRUE;
}
break;
}
default:
break;
}
gst_event_unref (event);
gst_object_unref (spc);
return result;
}
