gstreamer/ext/gl/gstgluploadelement.c

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/*
* GStreamer
* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <gst/gl/gl.h>
#include "gstgluploadelement.h"
GST_DEBUG_CATEGORY_STATIC (gst_gl_upload_element_debug);
#define GST_CAT_DEFAULT gst_gl_upload_element_debug
#define gst_gl_upload_element_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstGLUploadElement, gst_gl_upload_element,
GST_TYPE_GL_BASE_FILTER,
GST_DEBUG_CATEGORY_INIT (gst_gl_upload_element_debug, "gluploadelement", 0,
"glupload Element"););
static gboolean gst_gl_upload_element_get_unit_size (GstBaseTransform * trans,
GstCaps * caps, gsize * size);
static GstCaps *_gst_gl_upload_element_transform_caps (GstBaseTransform * bt,
GstPadDirection direction, GstCaps * caps, GstCaps * filter);
static gboolean _gst_gl_upload_element_set_caps (GstBaseTransform * bt,
GstCaps * in_caps, GstCaps * out_caps);
static gboolean gst_gl_upload_element_filter_meta (GstBaseTransform * trans,
GstQuery * query, GType api, const GstStructure * params);
static gboolean _gst_gl_upload_element_propose_allocation (GstBaseTransform *
bt, GstQuery * decide_query, GstQuery * query);
static gboolean _gst_gl_upload_element_decide_allocation (GstBaseTransform *
trans, GstQuery * query);
static GstFlowReturn
gst_gl_upload_element_prepare_output_buffer (GstBaseTransform * bt,
GstBuffer * buffer, GstBuffer ** outbuf);
static GstFlowReturn gst_gl_upload_element_transform (GstBaseTransform * bt,
GstBuffer * buffer, GstBuffer * outbuf);
static gboolean gst_gl_upload_element_stop (GstBaseTransform * bt);
static GstStateChangeReturn
gst_gl_upload_element_change_state (GstElement * element,
GstStateChange transition);
static GstStaticPadTemplate gst_gl_upload_element_src_pad_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw(ANY)"));
static void
gst_gl_upload_element_finalize (GObject * object)
{
GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (object);
if (upload->upload)
gst_object_unref (upload->upload);
upload->upload = NULL;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_gl_upload_element_class_init (GstGLUploadElementClass * klass)
{
GstBaseTransformClass *bt_class = GST_BASE_TRANSFORM_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstCaps *upload_caps;
bt_class->transform_caps = _gst_gl_upload_element_transform_caps;
bt_class->set_caps = _gst_gl_upload_element_set_caps;
bt_class->filter_meta = gst_gl_upload_element_filter_meta;
bt_class->propose_allocation = _gst_gl_upload_element_propose_allocation;
bt_class->decide_allocation = _gst_gl_upload_element_decide_allocation;
bt_class->get_unit_size = gst_gl_upload_element_get_unit_size;
bt_class->prepare_output_buffer = gst_gl_upload_element_prepare_output_buffer;
bt_class->transform = gst_gl_upload_element_transform;
bt_class->stop = gst_gl_upload_element_stop;
bt_class->passthrough_on_same_caps = TRUE;
element_class->change_state = gst_gl_upload_element_change_state;
gst_element_class_add_static_pad_template (element_class,
&gst_gl_upload_element_src_pad_template);
upload_caps = gst_gl_upload_get_input_template_caps ();
gst_element_class_add_pad_template (element_class,
gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, upload_caps));
gst_caps_unref (upload_caps);
gst_element_class_set_metadata (element_class,
"OpenGL uploader", "Filter/Video",
"Uploads data into OpenGL", "Matthew Waters <matthew@centricular.com>");
gobject_class->finalize = gst_gl_upload_element_finalize;
}
static void
gst_gl_upload_element_init (GstGLUploadElement * upload)
{
gst_base_transform_set_prefer_passthrough (GST_BASE_TRANSFORM (upload), TRUE);
}
static gboolean
gst_gl_upload_element_stop (GstBaseTransform * bt)
{
GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt);
if (upload->upload) {
gst_object_unref (upload->upload);
upload->upload = NULL;
}
return GST_BASE_TRANSFORM_CLASS (parent_class)->stop (bt);
}
static gboolean
gst_gl_upload_element_get_unit_size (GstBaseTransform * trans, GstCaps * caps,
gsize * size)
{
gboolean ret = FALSE;
GstVideoInfo info;
ret = gst_video_info_from_caps (&info, caps);
if (ret)
*size = GST_VIDEO_INFO_SIZE (&info);
return TRUE;
}
static GstCaps *
_gst_gl_upload_element_transform_caps (GstBaseTransform * bt,
GstPadDirection direction, GstCaps * caps, GstCaps * filter)
{
GstGLBaseFilter *base_filter = GST_GL_BASE_FILTER (bt);
GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt);
GstGLContext *context;
if (base_filter->display && !gst_gl_base_filter_find_gl_context (base_filter))
return NULL;
context = GST_GL_BASE_FILTER (bt)->context;
if (upload->upload == NULL)
upload->upload = gst_gl_upload_new (context);
return gst_gl_upload_transform_caps (upload->upload, context, direction, caps,
filter);
}
static gboolean
gst_gl_upload_element_filter_meta (GstBaseTransform * trans, GstQuery * query,
GType api, const GstStructure * params)
{
/* propose all metadata upstream */
return TRUE;
}
static gboolean
_gst_gl_upload_element_propose_allocation (GstBaseTransform * bt,
GstQuery * decide_query, GstQuery * query)
{
GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt);
GstGLContext *context = GST_GL_BASE_FILTER (bt)->context;
gboolean ret;
if (!upload->upload)
return FALSE;
if (!context)
return FALSE;
gst_gl_upload_set_context (upload->upload, context);
ret = GST_BASE_TRANSFORM_CLASS (parent_class)->propose_allocation (bt,
decide_query, query);
gst_gl_upload_propose_allocation (upload->upload, decide_query, query);
return ret;
}
static gboolean
_gst_gl_upload_element_decide_allocation (GstBaseTransform * trans,
GstQuery * query)
{
GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (trans);
GstGLContext *context = GST_GL_BASE_FILTER (trans)->context;
if (upload->upload && context)
gst_gl_upload_set_context (upload->upload, context);
return
GST_BASE_TRANSFORM_CLASS
(gst_gl_upload_element_parent_class)->decide_allocation (trans, query);
}
static gboolean
_gst_gl_upload_element_set_caps (GstBaseTransform * bt, GstCaps * in_caps,
GstCaps * out_caps)
{
GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt);
return gst_gl_upload_set_caps (upload->upload, in_caps, out_caps);
}
GstFlowReturn
gst_gl_upload_element_prepare_output_buffer (GstBaseTransform * bt,
GstBuffer * buffer, GstBuffer ** outbuf)
{
GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt);
GstGLUploadReturn ret;
GstBaseTransformClass *bclass;
bclass = GST_BASE_TRANSFORM_GET_CLASS (bt);
if (gst_base_transform_is_passthrough (bt)) {
*outbuf = buffer;
return GST_FLOW_OK;
}
if (!upload->upload)
return GST_FLOW_NOT_NEGOTIATED;
again:
ret = gst_gl_upload_perform_with_buffer (upload->upload, buffer, outbuf);
if (ret == GST_GL_UPLOAD_RECONFIGURE) {
GstPad *sinkpad = GST_BASE_TRANSFORM_SINK_PAD (bt);
GstCaps *incaps = gst_pad_get_current_caps (sinkpad);
GST_DEBUG_OBJECT (bt,
"Failed to upload with curren caps -- reconfiguring.");
/* Note: gst_base_transform_reconfigure_src() cannot be used here.
* Reconfiguring must be synchronous to avoid dropping the current
* buffer */
gst_pad_send_event (sinkpad, gst_event_new_caps (incaps));
gst_caps_unref (incaps);
if (!gst_pad_needs_reconfigure (GST_BASE_TRANSFORM_SRC_PAD (bt))) {
GST_DEBUG_OBJECT (bt, "Retry uploading with new caps");
goto again;
}
return GST_FLOW_OK;
}
if (ret != GST_GL_UPLOAD_DONE || *outbuf == NULL) {
GST_ELEMENT_ERROR (bt, RESOURCE, NOT_FOUND, ("%s",
"Failed to upload buffer"), (NULL));
if (*outbuf)
gst_buffer_unref (*outbuf);
return GST_FLOW_ERROR;
}
/* basetransform doesn't unref if they're the same */
if (buffer == *outbuf)
gst_buffer_unref (*outbuf);
else
bclass->copy_metadata (bt, buffer, *outbuf);
return GST_FLOW_OK;
}
static GstFlowReturn
gst_gl_upload_element_transform (GstBaseTransform * bt, GstBuffer * buffer,
GstBuffer * outbuf)
{
return GST_FLOW_OK;
}
static GstStateChangeReturn
gst_gl_upload_element_change_state (GstElement * element,
GstStateChange transition)
{
GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (element);
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GST_DEBUG_OBJECT (upload, "changing state: %s => %s",
gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
if (upload->upload) {
gst_object_unref (upload->upload);
upload->upload = NULL;
}
break;
default:
break;
}
return ret;
}