static gboolean
gst_interlace_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
gboolean ret;
GstInterlace *interlace;
interlace = GST_INTERLACE (parent);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CAPS:
{
GstCaps *filter, *caps;
gst_query_parse_caps (query, &filter);
caps = gst_interlace_getcaps (pad, interlace, filter);
gst_query_set_caps_result (query, caps);
gst_caps_unref (caps);
ret = TRUE;
break;
}
default:
ret = gst_pad_query_default (pad, parent, query);
break;
}
return ret;
}
static GstCaps *
gst_interlace_getcaps (GstPad * pad)
{
GstInterlace *interlace;
GstPad *otherpad;
GstCaps *othercaps;
GstCaps *icaps;
interlace = GST_INTERLACE (gst_pad_get_parent (pad));
otherpad =
(pad == interlace->srcpad) ? interlace->sinkpad : interlace->srcpad;
othercaps = gst_pad_peer_get_caps (otherpad);
if (othercaps == NULL) {
icaps = gst_caps_copy (gst_pad_get_pad_template_caps (otherpad));
} else {
icaps = gst_caps_intersect (othercaps,
gst_pad_get_pad_template_caps (otherpad));
gst_caps_unref (othercaps);
}
gst_caps_set_simple (icaps, "interlaced", G_TYPE_BOOLEAN,
pad == interlace->srcpad ? TRUE : FALSE, NULL);
return icaps;
}
static void
gst_interlace_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstInterlace *interlace = GST_INTERLACE (object);
switch (prop_id) {
case PROP_TOP_FIELD_FIRST:
g_value_set_boolean (value, interlace->top_field_first);
break;
case PROP_PATTERN:
g_value_set_enum (value, interlace->pattern);
break;
case PROP_PATTERN_OFFSET:
g_value_set_uint (value, interlace->pattern_offset);
break;
case PROP_ALLOW_RFF:
g_value_set_boolean (value, interlace->allow_rff);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstFlowReturn
gst_interlace_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
{
GstInterlace *interlace = GST_INTERLACE (parent);
GstFlowReturn ret = GST_FLOW_OK;
gint num_fields = 0;
int current_fields;
const PulldownFormat *format;
GST_DEBUG ("Received buffer at %u:%02u:%02u:%09u",
(guint) (GST_BUFFER_TIMESTAMP (buffer) / (GST_SECOND * 60 * 60)),
(guint) ((GST_BUFFER_TIMESTAMP (buffer) / (GST_SECOND * 60)) % 60),
(guint) ((GST_BUFFER_TIMESTAMP (buffer) / GST_SECOND) % 60),
(guint) (GST_BUFFER_TIMESTAMP (buffer) % GST_SECOND));
GST_DEBUG ("duration %" GST_TIME_FORMAT " flags %04x %s %s %s",
GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)),
GST_BUFFER_FLAGS (buffer),
(GST_BUFFER_FLAGS (buffer) & GST_VIDEO_BUFFER_FLAG_TFF) ? "tff" : "",
(GST_BUFFER_FLAGS (buffer) & GST_VIDEO_BUFFER_FLAG_RFF) ? "rff" : "",
(GST_BUFFER_FLAGS (buffer) & GST_VIDEO_BUFFER_FLAG_ONEFIELD) ? "onefield"
: "");
if (GST_BUFFER_FLAGS (buffer) & GST_BUFFER_FLAG_DISCONT) {
GST_DEBUG ("discont");
if (interlace->stored_frame) {
gst_buffer_unref (interlace->stored_frame);
}
interlace->stored_frame = NULL;
interlace->stored_fields = 0;
if (interlace->top_field_first) {
interlace->field_index = 0;
} else {
interlace->field_index = 1;
}
}
if (interlace->timebase == GST_CLOCK_TIME_NONE) {
/* get the initial ts */
interlace->timebase = GST_BUFFER_TIMESTAMP (buffer);
}
format = &formats[interlace->pattern];
if (interlace->stored_fields == 0
&& interlace->phase_index == interlace->pattern_offset
&& GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (buffer))) {
interlace->timebase = GST_BUFFER_TIMESTAMP (buffer);
interlace->fields_since_timebase = 0;
}
if (!format->n_fields[interlace->phase_index]) {
interlace->phase_index = 0;
}
current_fields = format->n_fields[interlace->phase_index];
/* increment the phase index */
interlace->phase_index++;
GST_DEBUG ("incoming buffer assigned %d fields", current_fields);
num_fields = interlace->stored_fields + current_fields;
while (num_fields >= 2) {
GstBuffer *output_buffer;
int n_output_fields;
gboolean interlaced = FALSE;
GST_DEBUG ("have %d fields, %d current, %d stored",
num_fields, current_fields, interlace->stored_fields);
if (interlace->stored_fields > 0) {
GST_DEBUG ("1 field from stored, 1 from current");
output_buffer = gst_buffer_new_and_alloc (gst_buffer_get_size (buffer));
/* take the first field from the stored frame */
copy_field (interlace, output_buffer, interlace->stored_frame,
interlace->field_index);
interlace->stored_fields--;
/* take the second field from the incoming buffer */
copy_field (interlace, output_buffer, buffer, interlace->field_index ^ 1);
current_fields--;
n_output_fields = 2;
interlaced = TRUE;
} else {
output_buffer = gst_buffer_make_writable (gst_buffer_ref (buffer));
if (num_fields >= 3 && interlace->allow_rff) {
GST_DEBUG ("3 fields from current");
/* take both fields from incoming buffer */
current_fields -= 3;
n_output_fields = 3;
} else {
GST_DEBUG ("2 fields from current");
/* take both buffers from incoming buffer */
current_fields -= 2;
n_output_fields = 2;
}
}
num_fields -= n_output_fields;
gst_interlace_decorate_buffer (interlace, output_buffer, n_output_fields,
interlaced);
interlace->fields_since_timebase += n_output_fields;
interlace->field_index ^= (n_output_fields & 1);
GST_DEBUG_OBJECT (interlace, "output timestamp %" GST_TIME_FORMAT
" duration %" GST_TIME_FORMAT " flags %04x %s %s %s",
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (output_buffer)),
GST_TIME_ARGS (GST_BUFFER_DURATION (output_buffer)),
GST_BUFFER_FLAGS (output_buffer),
(GST_BUFFER_FLAGS (output_buffer) & GST_VIDEO_BUFFER_FLAG_TFF) ? "tff" :
"",
(GST_BUFFER_FLAGS (output_buffer) & GST_VIDEO_BUFFER_FLAG_RFF) ? "rff" :
"",
(GST_BUFFER_FLAGS (output_buffer) & GST_VIDEO_BUFFER_FLAG_ONEFIELD) ?
"onefield" : "");
ret = gst_pad_push (interlace->srcpad, output_buffer);
if (ret != GST_FLOW_OK) {
GST_DEBUG_OBJECT (interlace, "Failed to push buffer %p", output_buffer);
break;
}
}
GST_DEBUG ("done. %d fields remaining", current_fields);
if (interlace->stored_frame) {
gst_buffer_unref (interlace->stored_frame);
interlace->stored_frame = NULL;
interlace->stored_fields = 0;
}
if (current_fields > 0) {
interlace->stored_frame = buffer;
interlace->stored_fields = current_fields;
} else {
gst_buffer_unref (buffer);
}
return ret;
}
static gboolean
gst_interlace_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
gboolean ret;
GstInterlace *interlace;
interlace = GST_INTERLACE (parent);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
GST_DEBUG_OBJECT (interlace, "handling FLUSH_START");
ret = gst_pad_push_event (interlace->srcpad, event);
break;
case GST_EVENT_FLUSH_STOP:
GST_DEBUG_OBJECT (interlace, "handling FLUSH_STOP");
gst_interlace_reset (interlace);
ret = gst_pad_push_event (interlace->srcpad, event);
break;
case GST_EVENT_EOS:
#if 0
/* FIXME revive this when we output ONEFIELD and RFF buffers */
{
gint num_fields;
const PulldownFormat *format = &formats[interlace->pattern];
num_fields =
format->n_fields[interlace->phase_index] -
interlace->stored_fields_pushed;
interlace->stored_fields_pushed = 0;
/* on EOS we want to push as many sane frames as are left */
while (num_fields > 1) {
GstBuffer *output_buffer;
/* make metadata writable before editing it */
interlace->stored_frame =
gst_buffer_make_metadata_writable (interlace->stored_frame);
num_fields -= 2;
gst_interlace_decorate_buffer (interlace, interlace->stored_frame,
n_fields, FALSE);
/* ref output_buffer/stored frame because we want to keep it for now
* and pushing gives away a ref */
output_buffer = gst_buffer_ref (interlace->stored_frame);
if (gst_pad_push (interlace->srcpad, output_buffer)) {
GST_DEBUG_OBJECT (interlace, "Failed to push buffer %p",
output_buffer);
return FALSE;
}
output_buffer = NULL;
if (num_fields <= 1) {
gst_buffer_unref (interlace->stored_frame);
interlace->stored_frame = NULL;
break;
}
}
/* increment the phase index */
interlace->phase_index++;
if (!format->n_fields[interlace->phase_index]) {
interlace->phase_index = 0;
}
}
#endif
ret = gst_pad_push_event (interlace->srcpad, event);
break;
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
ret = gst_interlace_setcaps (interlace, caps);
gst_event_unref (event);
break;
}
default:
ret = gst_pad_push_event (interlace->srcpad, event);
break;
}
return ret;
}
static gboolean
gst_interlace_setcaps (GstPad * pad, GstCaps * caps)
{
GstInterlace *interlace;
gboolean ret;
int width, height;
GstVideoFormat format;
gboolean interlaced = TRUE;
int fps_n, fps_d;
GstPad *otherpad;
GstCaps *othercaps;
const PulldownFormat *pdformat;
interlace = GST_INTERLACE (gst_pad_get_parent (pad));
otherpad =
(pad == interlace->srcpad) ? interlace->sinkpad : interlace->srcpad;
ret = gst_video_format_parse_caps (caps, &format, &width, &height);
gst_video_format_parse_caps_interlaced (caps, &interlaced);
ret &= gst_video_parse_caps_framerate (caps, &fps_n, &fps_d);
if (!ret)
goto error;
othercaps = gst_caps_copy (caps);
pdformat = &formats[interlace->pattern];
if (pad == interlace->srcpad) {
gst_caps_set_simple (othercaps, "interlaced", G_TYPE_BOOLEAN, FALSE, NULL);
gst_caps_set_simple (othercaps, "framerate", GST_TYPE_FRACTION,
fps_n * pdformat->ratio_d, fps_d * pdformat->ratio_n, NULL);
} else {
gst_caps_set_simple (othercaps, "interlaced", G_TYPE_BOOLEAN, TRUE, NULL);
gst_caps_set_simple (othercaps, "framerate", GST_TYPE_FRACTION,
fps_n * pdformat->ratio_n, fps_d * pdformat->ratio_d, NULL);
}
ret = gst_pad_set_caps (otherpad, othercaps);
if (!ret)
goto error;
interlace->format = format;
interlace->width = width;
interlace->height = height;
interlace->phase_index = interlace->pattern_offset;
if (pad == interlace->sinkpad) {
gst_caps_replace (&interlace->srccaps, othercaps);
interlace->src_fps_n = fps_n * pdformat->ratio_n;
interlace->src_fps_d = fps_d * pdformat->ratio_d;
} else {
gst_caps_replace (&interlace->srccaps, caps);
interlace->src_fps_n = fps_n;
interlace->src_fps_d = fps_d;
}
error:
g_object_unref (interlace);
return ret;
}
