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use gstprofile to plug an encoder and encode the current frame

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Brandon Lewis 2010-07-15 18:59:50 +02:00 committed by Edward Hervey
parent 70a040f760
commit f487fe3fb8
1 changed files with 56 additions and 4 deletions
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60
ges/ges-screenshot.c
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@ -19,9 +19,11 @@
*/
#include <gst/gst.h>
#include <gst/profile/gstfactorylists.h>
#include <glib-object.h>
#include <string.h>
#include "ges-screenshot.h"
#include "ges-internal.h"
/* FIXME (merge into core): This code is duplicated from gstscreenshot.c and
* gstplaysink.c, adapted to handle encoding the converted frame into
@ -75,13 +77,50 @@ create_element (const gchar * factory_name, GstElement ** element,
GstBuffer *
gst_play_frame_conv_convert (GstBuffer * buf, GstCaps * to_caps)
{
GstElement *src, *csp, *vscale, *sink, *pipeline;
GstElement *src, *csp, *vscale, *sink, *encoder, *pipeline;
GstMessage *msg;
GstBuffer *result = NULL;
GError *error = NULL;
GstBus *bus;
GstCaps *from_caps;
GstFlowReturn ret;
GValueArray *encoders = NULL;
GValueArray *filtered = NULL;
GValue *factory_value = NULL;
GstElementFactory *factory = NULL;
encoders =
gst_factory_list_get_elements (GST_FACTORY_LIST_ENCODER |
GST_FACTORY_LIST_IMAGE, GST_RANK_NONE);
GST_INFO ("got factory list %p", encoders);
gst_factory_list_debug (encoders);
if (!(encoders && encoders->n_values))
goto no_encoder;
filtered = gst_factory_list_filter (encoders, to_caps, GST_PAD_SRC, FALSE);
GST_INFO ("got filtered list %p", filtered);
gst_factory_list_debug (filtered);
if (!(filtered && filtered->n_values))
goto no_encoder;
factory_value = g_value_array_get_nth (filtered, 0);
factory = (GstElementFactory *) g_value_get_object (factory_value);
GST_INFO ("got factory %p", factory);
if (!factory)
goto no_encoder;
g_value_array_free (filtered);
g_value_array_free (encoders);
encoder = gst_element_factory_create (factory, NULL);
GST_INFO ("created encoder element %p, %s", encoder,
gst_element_get_name (encoder));
if (!encoder)
goto no_encoder;
from_caps = GST_BUFFER_CAPS (buf);
@ -100,7 +139,7 @@ gst_play_frame_conv_convert (GstBuffer * buf, GstCaps * to_caps)
goto no_pipeline;
GST_DEBUG ("adding elements");
gst_bin_add_many (GST_BIN (pipeline), src, csp, vscale, sink, NULL);
gst_bin_add_many (GST_BIN (pipeline), src, csp, vscale, encoder, sink, NULL);
/* set caps */
g_object_set (src, "caps", from_caps, NULL);
@ -115,8 +154,12 @@ gst_play_frame_conv_convert (GstBuffer * buf, GstCaps * to_caps)
if (!gst_element_link_pads (csp, "src", vscale, "sink"))
goto link_failed;
GST_DEBUG ("linking vscale->sink");
if (!gst_element_link_pads (vscale, "src", sink, "sink"))
GST_DEBUG ("linking vscale->encoder");
if (!gst_element_link (vscale, encoder))
goto link_failed;
GST_DEBUG ("linking encoder->sink");
if (!gst_element_link_pads (encoder, "src", sink, "sink"))
goto link_failed;
/* now set the pipeline to the paused state, after we push the buffer into
@ -180,6 +223,15 @@ gst_play_frame_conv_convert (GstBuffer * buf, GstCaps * to_caps)
return result;
/* ERRORS */
no_encoder:
{
g_warning ("could not find an encoder for provided caps");
if (encoders)
g_value_array_free (encoders);
if (filtered)
g_value_array_free (encoders);
return NULL;
}
no_elements:
{
g_warning ("Could not take screenshot: %s", error->message);