/* chain function
* this function does the actual processing
*/
static GstFlowReturn
gst_kate_enc_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
GstKateEnc *ke = GST_KATE_ENC (parent);
GstFlowReturn rflow;
GST_DEBUG_OBJECT (ke, "got packet, %" G_GSIZE_FORMAT " bytes",
gst_buffer_get_size (buf));
/* first push headers if we haven't done that yet */
rflow = gst_kate_enc_flush_headers (ke);
if (G_LIKELY (rflow == GST_FLOW_OK)) {
/* flush any packet we had waiting */
rflow = gst_kate_enc_flush_waiting (ke, GST_BUFFER_TIMESTAMP (buf));
if (G_LIKELY (rflow == GST_FLOW_OK)) {
if (ke->format == GST_KATE_FORMAT_SPU) {
/* encode a kate_bitmap */
rflow = gst_kate_enc_chain_spu (ke, buf);
} else {
/* encode text */
rflow = gst_kate_enc_chain_text (ke, buf);
}
}
}
gst_buffer_unref (buf);
return rflow;
}
/* chain function
* this function does the actual processing
*/
static GstFlowReturn
gst_kate_enc_chain (GstPad * pad, GstBuffer * buf)
{
GstKateEnc *ke = GST_KATE_ENC (gst_pad_get_parent (pad));
GstFlowReturn rflow = GST_FLOW_OK;
GstCaps *caps;
const gchar *mime_type = NULL;
GST_DEBUG_OBJECT (ke, "got packet, %u bytes", GST_BUFFER_SIZE (buf));
/* get the type of the data we're being sent */
caps = GST_PAD_CAPS (pad);
if (G_UNLIKELY (caps == NULL)) {
GST_WARNING_OBJECT (ke, "No input caps set");
rflow = GST_FLOW_NOT_NEGOTIATED;
} else {
const GstStructure *structure = gst_caps_get_structure (caps, 0);
if (structure)
mime_type = gst_structure_get_name (structure);
if (mime_type) {
GST_LOG_OBJECT (ke, "Packet has MIME type %s", mime_type);
/* first push headers if we haven't done that yet */
rflow = gst_kate_enc_flush_headers (ke);
if (G_LIKELY (rflow == GST_FLOW_OK)) {
/* flush any packet we had waiting */
rflow = gst_kate_enc_flush_waiting (ke, GST_BUFFER_TIMESTAMP (buf));
if (G_LIKELY (rflow == GST_FLOW_OK)) {
if (!strcmp (mime_type, GST_KATE_SPU_MIME_TYPE)) {
/* encode a kate_bitmap */
rflow = gst_kate_enc_chain_spu (ke, buf);
} else {
/* encode text */
rflow = gst_kate_enc_chain_text (ke, buf, mime_type);
}
}
}
} else {
GST_WARNING_OBJECT (ke, "Packet has no MIME type, ignored");
}
}
gst_buffer_unref (buf);
gst_object_unref (ke);
GST_LOG_OBJECT (ke, "Leaving chain function");
return rflow;
}
static gboolean
gst_kate_enc_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstKateEnc *ke = GST_KATE_ENC (parent);
const GstStructure *structure;
gboolean ret;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
ret = gst_kate_enc_setcaps (ke, caps);
gst_event_unref (event);
break;
}
case GST_EVENT_SEGMENT:{
GstSegment seg;
GST_LOG_OBJECT (ke, "Got newsegment event");
gst_event_copy_segment (event, &seg);
if (!ke->headers_sent) {
if (ke->pending_segment)
gst_event_unref (ke->pending_segment);
ke->pending_segment = event;
event = NULL;
}
if (ke->initialized) {
GST_LOG_OBJECT (ke, "ensuring all headers are in");
if (gst_kate_enc_flush_headers (ke) != GST_FLOW_OK) {
GST_WARNING_OBJECT (ke, "Failed to flush headers");
} else {
if (seg.format != GST_FORMAT_TIME
|| !GST_CLOCK_TIME_IS_VALID (seg.start)) {
GST_WARNING_OBJECT (ke,
"No time in newsegment event %p, format %d, timestamp %"
G_GINT64_FORMAT, event, (int) seg.format, seg.start);
/* to be safe, we'd need to generate a keepalive anyway, but we'd have to guess at the timestamp to use; a
good guess would be the last known timestamp plus the keepalive time, but if we then get a packet with a
timestamp less than this, it would fail to encode, which would be Bad. If we don't encode a keepalive, we
run the risk of stalling the pipeline and hanging, which is Very Bad. Oh dear. We can't exit(-1), can we ? */
} else {
float t = seg.start / (double) GST_SECOND;
if (ke->delayed_spu
&& t - ke->delayed_start / (double) GST_SECOND >=
ke->default_spu_duration) {
if (G_UNLIKELY (gst_kate_enc_flush_waiting (ke,
seg.start) != GST_FLOW_OK)) {
GST_WARNING_OBJECT (ke, "Failed to encode delayed packet");
/* continue with new segment handling anyway */
}
}
GST_LOG_OBJECT (ke, "ts %f, last %f (min %f)", t,
ke->last_timestamp / (double) GST_SECOND,
ke->keepalive_min_time);
if (ke->keepalive_min_time > 0.0f
&& t - ke->last_timestamp / (double) GST_SECOND >=
ke->keepalive_min_time) {
/* we only generate a keepalive if there is no SPU waiting, as it would
mean out of sequence start times - and granulepos */
if (!ke->delayed_spu) {
gst_kate_enc_generate_keepalive (ke, seg.start);
}
}
}
}
}
if (event)
ret = gst_pad_push_event (ke->srcpad, event);
else
ret = TRUE;
break;
}
case GST_EVENT_CUSTOM_DOWNSTREAM:
GST_LOG_OBJECT (ke, "Got custom downstream event");
/* adapted from the dvdsubdec element */
structure = gst_event_get_structure (event);
if (structure != NULL
&& gst_structure_has_name (structure, "application/x-gst-dvd")) {
if (ke->initialized) {
GST_LOG_OBJECT (ke, "ensuring all headers are in");
if (gst_kate_enc_flush_headers (ke) != GST_FLOW_OK) {
GST_WARNING_OBJECT (ke, "Failed to flush headers");
} else {
const gchar *event_name =
gst_structure_get_string (structure, "event");
if (event_name) {
if (!strcmp (event_name, "dvd-spu-clut-change")) {
gchar name[16];
int idx;
gboolean found;
gint value;
GST_INFO_OBJECT (ke, "New CLUT received");
for (idx = 0; idx < 16; ++idx) {
g_snprintf (name, sizeof (name), "clut%02d", idx);
found = gst_structure_get_int (structure, name, &value);
if (found) {
ke->spu_clut[idx] = value;
} else {
GST_WARNING_OBJECT (ke,
"DVD CLUT event did not contain %s field", name);
}
}
} else if (!strcmp (event_name, "dvd-lang-codes")) {
/* we can't know which stream corresponds to us */
}
} else {
GST_WARNING_OBJECT (ke, "custom downstream event with no name");
}
}
}
}
ret = gst_pad_push_event (ke->srcpad, event);
break;
case GST_EVENT_TAG:
GST_LOG_OBJECT (ke, "Got tag event");
if (ke->tags) {
GstTagList *list;
gst_event_parse_tag (event, &list);
gst_tag_list_insert (ke->tags, list,
gst_tag_setter_get_tag_merge_mode (GST_TAG_SETTER (ke)));
} else {
g_assert_not_reached ();
}
ret = gst_pad_event_default (pad, parent, event);
break;
case GST_EVENT_EOS:
GST_INFO_OBJECT (ke, "Got EOS event");
if (ke->initialized) {
GST_LOG_OBJECT (ke, "ensuring all headers are in");
if (gst_kate_enc_flush_headers (ke) != GST_FLOW_OK) {
GST_WARNING_OBJECT (ke, "Failed to flush headers");
} else {
kate_packet kp;
int ret;
GstClockTime delayed_end =
ke->delayed_start + ke->default_spu_duration * GST_SECOND;
if (G_UNLIKELY (gst_kate_enc_flush_waiting (ke,
delayed_end) != GST_FLOW_OK)) {
GST_WARNING_OBJECT (ke, "Failed to encode delayed packet");
/* continue with EOS handling anyway */
}
ret = kate_encode_finish (&ke->k, -1, &kp);
if (ret < 0) {
GST_WARNING_OBJECT (ke, "Failed to encode EOS packet: %s",
gst_kate_util_get_error_message (ret));
} else {
kate_int64_t granpos = kate_encode_get_granule (&ke->k);
GST_LOG_OBJECT (ke, "EOS packet encoded");
if (gst_kate_enc_push_and_free_kate_packet (ke, &kp, granpos,
ke->latest_end_time, 0, FALSE)) {
GST_WARNING_OBJECT (ke, "Failed to push EOS packet");
}
}
}
}
ret = gst_pad_event_default (pad, parent, event);
break;
default:
GST_LOG_OBJECT (ke, "Got unhandled event");
ret = gst_pad_event_default (pad, parent, event);
break;
}
return ret;
}