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ccconverter: pivot to implementing generate_output

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Will make a n-n buffer element much easier to implement.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1116>
This commit is contained in:
Matthew Waters 2020-03-12 09:55:40 +11:00 committed by GStreamer Merge Bot
parent dc57fb7095
commit afc120fa74
1 changed files with 43 additions and 5 deletions
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48
ext/closedcaption/gstccconverter.c
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@ -1189,14 +1189,13 @@ convert_cea708_cdp_cea708_cc_data (GstCCConverter * self, GstBuffer * inbuf,
}
static GstFlowReturn
gst_cc_converter_transform (GstBaseTransform * base, GstBuffer * inbuf,
gst_cc_converter_transform (GstCCConverter * self, GstBuffer * inbuf,
GstBuffer * outbuf)
{
GstCCConverter *self = GST_CCCONVERTER (base);
GstVideoTimeCodeMeta *tc_meta = gst_buffer_get_video_time_code_meta (inbuf);
GstFlowReturn ret = GST_FLOW_OK;
GST_DEBUG_OBJECT (base, "Converting %" GST_PTR_FORMAT " from %u to %u", inbuf,
GST_DEBUG_OBJECT (self, "Converting %" GST_PTR_FORMAT " from %u to %u", inbuf,
self->input_caption_type, self->output_caption_type);
switch (self->input_caption_type) {
@ -1293,6 +1292,45 @@ gst_cc_converter_transform (GstBaseTransform * base, GstBuffer * inbuf,
0 ? GST_FLOW_OK : GST_BASE_TRANSFORM_FLOW_DROPPED;
}
static GstFlowReturn
gst_cc_converter_generate_output (GstBaseTransform * base, GstBuffer ** outbuf)
{
GstBaseTransformClass *bclass = GST_BASE_TRANSFORM_GET_CLASS (base);
GstCCConverter *self = GST_CCCONVERTER (base);
GstBuffer *inbuf = base->queued_buf;
GstFlowReturn ret;
*outbuf = NULL;
base->queued_buf = NULL;
if (!inbuf) {
return GST_FLOW_OK;
}
if (gst_base_transform_is_passthrough (base)) {
*outbuf = inbuf;
ret = GST_FLOW_OK;
} else {
ret = bclass->prepare_output_buffer (base, inbuf, outbuf);
if (ret != GST_FLOW_OK || *outbuf == NULL)
goto no_buffer;
ret = gst_cc_converter_transform (self, inbuf, *outbuf);
gst_buffer_unref (inbuf);
}
return ret;
no_buffer:
{
gst_buffer_unref (inbuf);
*outbuf = NULL;
GST_WARNING_OBJECT (self, "could not get buffer from pool: %s",
gst_flow_get_name (ret));
return ret;
}
}
static gboolean
gst_cc_converter_start (GstBaseTransform * base)
{
@ -1330,8 +1368,8 @@ gst_cc_converter_class_init (GstCCConverterClass * klass)
basetransform_class->fixate_caps =
GST_DEBUG_FUNCPTR (gst_cc_converter_fixate_caps);
basetransform_class->set_caps = GST_DEBUG_FUNCPTR (gst_cc_converter_set_caps);
basetransform_class->transform =
GST_DEBUG_FUNCPTR (gst_cc_converter_transform);
basetransform_class->generate_output =
GST_DEBUG_FUNCPTR (gst_cc_converter_generate_output);
basetransform_class->passthrough_on_same_caps = TRUE;
GST_DEBUG_CATEGORY_INIT (gst_cc_converter_debug, "ccconverter",