static GstStateChangeReturn
gst_y4m_encode_change_state (GstElement * element, GstStateChange transition)
{
GstY4mEncode *filter = GST_Y4M_ENCODE (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
case GST_STATE_CHANGE_READY_TO_PAUSED:
break;
default:
break;
}
ret = GST_CALL_PARENT_WITH_DEFAULT (GST_ELEMENT_CLASS, change_state,
(element, transition), GST_STATE_CHANGE_SUCCESS);
if (ret != GST_STATE_CHANGE_SUCCESS)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_y4m_encode_reset (filter);
break;
default:
break;
}
return GST_STATE_CHANGE_SUCCESS;
}
static void
gst_y4m_encode_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstY4mEncode G_GNUC_UNUSED *filter;
g_return_if_fail (GST_IS_Y4M_ENCODE (object));
filter = GST_Y4M_ENCODE (object);
switch (prop_id) {
default:
break;
}
}
static void
gst_y4m_encode_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstY4mEncode G_GNUC_UNUSED *filter;
g_return_if_fail (GST_IS_Y4M_ENCODE (object));
filter = GST_Y4M_ENCODE (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstFlowReturn
gst_y4m_encode_handle_frame (GstVideoEncoder * encoder,
GstVideoCodecFrame * frame)
{
GstY4mEncode *filter = GST_Y4M_ENCODE (encoder);
GstClockTime timestamp;
/* check we got some decent info from caps */
if (GST_VIDEO_INFO_FORMAT (&filter->info) == GST_VIDEO_FORMAT_UNKNOWN)
goto not_negotiated;
timestamp = GST_BUFFER_TIMESTAMP (frame->input_buffer);
if (G_UNLIKELY (!filter->header)) {
gboolean tff = FALSE;
if (GST_VIDEO_INFO_IS_INTERLACED (&filter->info)) {
tff =
GST_BUFFER_FLAG_IS_SET (frame->input_buffer,
GST_VIDEO_BUFFER_FLAG_TFF);
}
frame->output_buffer = gst_y4m_encode_get_stream_header (filter, tff);
filter->header = TRUE;
frame->output_buffer =
gst_buffer_append (frame->output_buffer,
gst_y4m_encode_get_frame_header (filter));
} else {
frame->output_buffer = gst_y4m_encode_get_frame_header (filter);
}
frame->output_buffer =
gst_buffer_append (frame->output_buffer,
gst_buffer_copy (frame->input_buffer));
/* decorate */
frame->output_buffer = gst_buffer_make_writable (frame->output_buffer);
GST_BUFFER_TIMESTAMP (frame->output_buffer) = timestamp;
return gst_video_encoder_finish_frame (encoder, frame);
not_negotiated:
{
GST_ELEMENT_ERROR (filter, CORE, NEGOTIATION, (NULL),
("format wasn't negotiated"));
return GST_FLOW_NOT_NEGOTIATED;
}
}
static gboolean
gst_y4m_encode_setcaps (GstPad * pad, GstCaps * vscaps)
{
gboolean ret;
GstY4mEncode *filter;
GstVideoInfo info;
filter = GST_Y4M_ENCODE (GST_PAD_PARENT (pad));
if (!gst_video_info_from_caps (&info, vscaps))
goto invalid_format;
switch (GST_VIDEO_INFO_FORMAT (&info)) {
case GST_VIDEO_FORMAT_I420:
filter->colorspace = "420";
break;
case GST_VIDEO_FORMAT_Y42B:
filter->colorspace = "422";
break;
case GST_VIDEO_FORMAT_Y41B:
filter->colorspace = "411";
break;
case GST_VIDEO_FORMAT_Y444:
filter->colorspace = "444";
break;
default:
goto invalid_format;
}
filter->info = info;
/* the template caps will do for the src pad, should always accept */
ret = gst_pad_set_caps (filter->srcpad,
gst_static_pad_template_get_caps (&y4mencode_src_factory));
filter->negotiated = ret;
return ret;
/* ERRORS */
invalid_format:
{
GST_ERROR_OBJECT (filter, "got invalid caps");
return FALSE;
}
}
static GstFlowReturn
gst_y4m_encode_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
GstY4mEncode *filter = GST_Y4M_ENCODE (parent);
GstBuffer *outbuf;
GstClockTime timestamp;
/* check we got some decent info from caps */
if (GST_VIDEO_INFO_FORMAT (&filter->info) == GST_VIDEO_FORMAT_UNKNOWN)
goto not_negotiated;
timestamp = GST_BUFFER_TIMESTAMP (buf);
if (G_UNLIKELY (!filter->header)) {
gboolean tff;
if (GST_VIDEO_INFO_IS_INTERLACED (&filter->info)) {
tff = GST_BUFFER_FLAG_IS_SET (buf, GST_VIDEO_BUFFER_FLAG_TFF);
}
outbuf = gst_y4m_encode_get_stream_header (filter, tff);
filter->header = TRUE;
outbuf =
gst_buffer_append (outbuf, gst_y4m_encode_get_frame_header (filter));
} else {
outbuf = gst_y4m_encode_get_frame_header (filter);
}
/* join with data, FIXME, strides are all wrong etc */
outbuf = gst_buffer_append (outbuf, buf);
/* decorate */
outbuf = gst_buffer_make_writable (outbuf);
GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
return gst_pad_push (filter->srcpad, outbuf);
/* ERRORS */
not_negotiated:
{
GST_ELEMENT_ERROR (filter, CORE, NEGOTIATION, (NULL),
("format wasn't negotiated before chain function"));
gst_buffer_unref (buf);
return GST_FLOW_NOT_NEGOTIATED;
}
}
static gboolean
gst_y4m_encode_set_format (GstVideoEncoder * encoder,
GstVideoCodecState * state)
{
GstY4mEncode *y4menc;
GstVideoInfo *info;
GstVideoCodecState *output_state;
y4menc = GST_Y4M_ENCODE (encoder);
info = &state->info;
switch (GST_VIDEO_INFO_FORMAT (info)) {
case GST_VIDEO_FORMAT_I420:
y4menc->colorspace = "420";
break;
case GST_VIDEO_FORMAT_Y42B:
y4menc->colorspace = "422";
break;
case GST_VIDEO_FORMAT_Y41B:
y4menc->colorspace = "411";
break;
case GST_VIDEO_FORMAT_Y444:
y4menc->colorspace = "444";
break;
default:
goto invalid_format;
}
y4menc->info = *info;
output_state =
gst_video_encoder_set_output_state (encoder,
gst_static_pad_template_get_caps (&y4mencode_src_factory), state);
gst_video_codec_state_unref (output_state);
return TRUE;
invalid_format:
{
GST_ERROR_OBJECT (y4menc, "Invalid format");
return FALSE;
}
}
static GstFlowReturn
gst_y4m_encode_chain (GstPad * pad, GstBuffer * buf)
{
GstY4mEncode *filter = GST_Y4M_ENCODE (GST_PAD_PARENT (pad));
GstBuffer *outbuf;
GstClockTime timestamp;
/* check we got some decent info from caps */
if (filter->width < 0) {
GST_ELEMENT_ERROR ("filter", CORE, NEGOTIATION, (NULL),
("format wasn't negotiated before chain function"));
gst_buffer_unref (buf);
return GST_FLOW_NOT_NEGOTIATED;
}
timestamp = GST_BUFFER_TIMESTAMP (buf);
if (G_UNLIKELY (!filter->header)) {
if (filter->interlaced == TRUE) {
if (GST_BUFFER_FLAG_IS_SET (buf, GST_VIDEO_BUFFER_TFF)) {
filter->top_field_first = TRUE;
} else {
filter->top_field_first = FALSE;
}
}
outbuf = gst_y4m_encode_get_stream_header (filter);
filter->header = TRUE;
outbuf = gst_buffer_join (outbuf, gst_y4m_encode_get_frame_header (filter));
} else {
outbuf = gst_y4m_encode_get_frame_header (filter);
}
/* join with data */
outbuf = gst_buffer_join (outbuf, buf);
/* decorate */
gst_buffer_make_metadata_writable (outbuf);
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (filter->srcpad));
GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
return gst_pad_push (filter->srcpad, outbuf);
}
static gboolean
gst_y4m_encode_setcaps (GstPad * pad, GstCaps * vscaps)
{
GstY4mEncode *filter;
GstStructure *structure;
gboolean res;
gint w, h;
guint32 fourcc;
const GValue *fps, *par, *interlaced;
filter = GST_Y4M_ENCODE (GST_PAD_PARENT (pad));
structure = gst_caps_get_structure (vscaps, 0);
res = gst_structure_get_int (structure, "width", &w);
res &= gst_structure_get_int (structure, "height", &h);
res &= ((fps = gst_structure_get_value (structure, "framerate")) != NULL);
res &= gst_structure_get_fourcc (structure, "format", &fourcc);
switch (fourcc) { /* Translate fourcc to Y4M colorspace code */
case GST_MAKE_FOURCC ('I', '4', '2', '0'):
case GST_MAKE_FOURCC ('I', 'Y', 'U', 'V'):
filter->colorspace = "420";
break;
case GST_MAKE_FOURCC ('Y', '4', '2', 'B'):
filter->colorspace = "422";
break;
case GST_MAKE_FOURCC ('Y', '4', '1', 'B'):
filter->colorspace = "411";
break;
case GST_MAKE_FOURCC ('Y', '4', '4', '4'):
filter->colorspace = "444";
break;
default:
res = FALSE;
break;
}
if (!res || w <= 0 || h <= 0 || !GST_VALUE_HOLDS_FRACTION (fps))
return FALSE;
/* optional interlaced info */
interlaced = gst_structure_get_value (structure, "interlaced");
/* optional par info */
par = gst_structure_get_value (structure, "pixel-aspect-ratio");
filter->width = w;
filter->height = h;
filter->fps_num = gst_value_get_fraction_numerator (fps);
filter->fps_den = gst_value_get_fraction_denominator (fps);
if ((par != NULL) && GST_VALUE_HOLDS_FRACTION (par)) {
filter->par_num = gst_value_get_fraction_numerator (par);
filter->par_den = gst_value_get_fraction_denominator (par);
} else { /* indicates unknown */
filter->par_num = 0;
filter->par_den = 0;
}
if ((interlaced != NULL) && G_VALUE_HOLDS (interlaced, G_TYPE_BOOLEAN)) {
filter->interlaced = g_value_get_boolean (interlaced);
} else {
/* assume progressive if no interlaced property in caps */
filter->interlaced = FALSE;
}
/* the template caps will do for the src pad, should always accept */
return gst_pad_set_caps (filter->srcpad,
gst_static_pad_template_get_caps (&y4mencode_src_factory));
}