gstreamer/ext/gtk/gstgtkglsink.c
Matthew Waters b97f2e6e6a gtk: implement video aspect-ratio handling
For both the software and the GL sink's.

Doesn't deal with the pixel-aspect-ratio field at all yet.
2015-06-12 15:17:30 +10:00

480 lines
14 KiB
C

/*
* 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.
*/
/**
* SECTION:gstgtkglsink
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstgtkglsink.h"
GST_DEBUG_CATEGORY (gst_debug_gtk_gl_sink);
#define GST_CAT_DEFAULT gst_debug_gtk_gl_sink
#define DEFAULT_FORCE_ASPECT_RATIO TRUE
static void gst_gtk_gl_sink_finalize (GObject * object);
static void gst_gtk_gl_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * param_spec);
static void gst_gtk_gl_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * param_spec);
static gboolean gst_gtk_gl_sink_stop (GstBaseSink * bsink);
static gboolean gst_gtk_gl_sink_query (GstBaseSink * bsink, GstQuery * query);
static GstStateChangeReturn
gst_gtk_gl_sink_change_state (GstElement * element, GstStateChange transition);
static void gst_gtk_gl_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
GstClockTime * start, GstClockTime * end);
static gboolean gst_gtk_gl_sink_set_caps (GstBaseSink * bsink, GstCaps * caps);
static GstFlowReturn gst_gtk_gl_sink_show_frame (GstVideoSink * bsink,
GstBuffer * buf);
static gboolean gst_gtk_gl_sink_propose_allocation (GstBaseSink * bsink,
GstQuery * query);
static GstStaticPadTemplate gst_gtk_gl_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_GL_MEMORY, "RGBA")));
enum
{
PROP_0,
PROP_WIDGET,
PROP_FORCE_ASPECT_RATIO,
};
enum
{
SIGNAL_0,
LAST_SIGNAL
};
#define gst_gtk_gl_sink_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstGtkGLSink, gst_gtk_gl_sink,
GST_TYPE_VIDEO_SINK, GST_DEBUG_CATEGORY_INIT (gst_debug_gtk_gl_sink,
"gtkglsink", 0, "Gtk Video Sink"));
static void
gst_gtk_gl_sink_class_init (GstGtkGLSinkClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseSinkClass *gstbasesink_class;
GstVideoSinkClass *gstvideosink_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbasesink_class = (GstBaseSinkClass *) klass;
gstvideosink_class = (GstVideoSinkClass *) klass;
gobject_class->set_property = gst_gtk_gl_sink_set_property;
gobject_class->get_property = gst_gtk_gl_sink_get_property;
gst_element_class_set_metadata (gstelement_class, "Gtk Video Sink",
"Sink/Video", "A video sink that renders to a GtkWidget",
"Matthew Waters <matthew@centricular.com>");
g_object_class_install_property (gobject_class, PROP_WIDGET,
g_param_spec_object ("widget", "Gtk Widget",
"The GtkWidget to place in the widget heirachy",
GTK_TYPE_WIDGET, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_FORCE_ASPECT_RATIO,
g_param_spec_boolean ("force-aspect-ratio",
"Force aspect ratio",
"When enabled, scaling will respect original aspect ratio",
DEFAULT_FORCE_ASPECT_RATIO,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&gst_gtk_gl_sink_template));
gobject_class->finalize = gst_gtk_gl_sink_finalize;
gstelement_class->change_state = gst_gtk_gl_sink_change_state;
gstbasesink_class->query = gst_gtk_gl_sink_query;
gstbasesink_class->set_caps = gst_gtk_gl_sink_set_caps;
gstbasesink_class->get_times = gst_gtk_gl_sink_get_times;
gstbasesink_class->propose_allocation = gst_gtk_gl_sink_propose_allocation;
gstbasesink_class->stop = gst_gtk_gl_sink_stop;
gstvideosink_class->show_frame = gst_gtk_gl_sink_show_frame;
}
static void
gst_gtk_gl_sink_init (GstGtkGLSink * gtk_sink)
{
gtk_sink->force_aspect_ratio = DEFAULT_FORCE_ASPECT_RATIO;
}
static void
gst_gtk_gl_sink_finalize (GObject * object)
{
GstGtkGLSink *gtk_sink = GST_GTK_GL_SINK (object);;
g_object_unref (gtk_sink->widget);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GtkGstGLWidget *
gst_gtk_gl_sink_get_widget (GstGtkGLSink * gtk_sink)
{
if (gtk_sink->widget != NULL)
return gtk_sink->widget;
/* Ensure GTK is initialized, this has no side effect if it was already
* initialized. Also, we do that lazily, so the application can be first */
if (!gtk_init_check (NULL, NULL)) {
GST_ERROR_OBJECT (gtk_sink, "Could not ensure GTK initialization.");
return NULL;
}
gtk_sink->widget = (GtkGstGLWidget *) gtk_gst_gl_widget_new ();
gtk_sink->bind_aspect_ratio =
g_object_bind_property (gtk_sink, "force-aspect-ratio", gtk_sink->widget,
"force-aspect-ratio", G_BINDING_BIDIRECTIONAL);
/* Take the floating ref, otherwise the destruction of the container will
* make this widget disapear possibly before we are done. */
gst_object_ref_sink (gtk_sink->widget);
return gtk_sink->widget;
}
static void
gst_gtk_gl_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstGtkGLSink *gtk_sink;
gtk_sink = GST_GTK_GL_SINK (object);
switch (prop_id) {
case PROP_WIDGET:
g_value_set_object (value, gst_gtk_gl_sink_get_widget (gtk_sink));
break;
case PROP_FORCE_ASPECT_RATIO:
g_value_set_boolean (value, gtk_sink->force_aspect_ratio);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gtk_gl_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstGtkGLSink *gtk_sink = GST_GTK_GL_SINK (object);
switch (prop_id) {
case PROP_FORCE_ASPECT_RATIO:
gtk_sink->force_aspect_ratio = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_gtk_gl_sink_query (GstBaseSink * bsink, GstQuery * query)
{
GstGtkGLSink *gtk_sink = GST_GTK_GL_SINK (bsink);
gboolean res = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CONTEXT:
{
const gchar *context_type;
GstContext *context, *old_context;
gboolean ret;
ret = gst_gl_handle_context_query ((GstElement *) gtk_sink, query,
&gtk_sink->display, &gtk_sink->gtk_context);
if (gtk_sink->display)
gst_gl_display_filter_gl_api (gtk_sink->display, GST_GL_API_OPENGL3);
gst_query_parse_context_type (query, &context_type);
if (g_strcmp0 (context_type, "gst.gl.local_context") == 0) {
GstStructure *s;
gst_query_parse_context (query, &old_context);
if (old_context)
context = gst_context_copy (old_context);
else
context = gst_context_new ("gst.gl.local_context", FALSE);
s = gst_context_writable_structure (context);
gst_structure_set (s, "context", GST_GL_TYPE_CONTEXT, gtk_sink->context,
NULL);
gst_query_set_context (query, context);
gst_context_unref (context);
ret = gtk_sink->context != NULL;
}
GST_LOG_OBJECT (gtk_sink, "context query of type %s %i", context_type,
ret);
if (ret)
return ret;
}
default:
res = GST_BASE_SINK_CLASS (parent_class)->query (bsink, query);
break;
}
return res;
}
static gboolean
gst_gtk_gl_sink_stop (GstBaseSink * bsink)
{
return TRUE;
}
static GstStateChangeReturn
gst_gtk_gl_sink_change_state (GstElement * element, GstStateChange transition)
{
GstGtkGLSink *gtk_sink = GST_GTK_GL_SINK (element);
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GST_DEBUG ("changing state: %s => %s",
gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (gst_gtk_gl_sink_get_widget (gtk_sink) == NULL)
return GST_STATE_CHANGE_FAILURE;
/* After this point, gtk_sink->widget will always be set */
if (!gtk_widget_get_parent (GTK_WIDGET (gtk_sink->widget))) {
GST_ERROR_OBJECT (gtk_sink,
"gtkglsink widget needs to be parented to work.");
return GST_STATE_CHANGE_FAILURE;
}
if (!gtk_gst_gl_widget_init_winsys (gtk_sink->widget))
return GST_STATE_CHANGE_FAILURE;
gtk_sink->display = gtk_gst_gl_widget_get_display (gtk_sink->widget);
gtk_sink->context = gtk_gst_gl_widget_get_context (gtk_sink->widget);
gtk_sink->gtk_context =
gtk_gst_gl_widget_get_gtk_context (gtk_sink->widget);
if (!gtk_sink->display || !gtk_sink->context || !gtk_sink->gtk_context)
return GST_STATE_CHANGE_FAILURE;
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gtk_gst_gl_widget_set_buffer (gtk_sink->widget, NULL);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
if (gtk_sink->display) {
gst_object_unref (gtk_sink->display);
gtk_sink->display = NULL;
}
if (gtk_sink->context) {
gst_object_unref (gtk_sink->context);
gtk_sink->context = NULL;
}
if (gtk_sink->gtk_context) {
gst_object_unref (gtk_sink->gtk_context);
gtk_sink->gtk_context = NULL;
}
break;
default:
break;
}
return ret;
}
static void
gst_gtk_gl_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
GstClockTime * start, GstClockTime * end)
{
GstGtkGLSink *gtk_sink;
gtk_sink = GST_GTK_GL_SINK (bsink);
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
*start = GST_BUFFER_TIMESTAMP (buf);
if (GST_BUFFER_DURATION_IS_VALID (buf))
*end = *start + GST_BUFFER_DURATION (buf);
else {
if (GST_VIDEO_INFO_FPS_N (&gtk_sink->v_info) > 0) {
*end = *start +
gst_util_uint64_scale_int (GST_SECOND,
GST_VIDEO_INFO_FPS_D (&gtk_sink->v_info),
GST_VIDEO_INFO_FPS_N (&gtk_sink->v_info));
}
}
}
}
gboolean
gst_gtk_gl_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
{
GstGtkGLSink *gtk_sink = GST_GTK_GL_SINK (bsink);
GST_DEBUG ("set caps with %" GST_PTR_FORMAT, caps);
if (!gst_video_info_from_caps (&gtk_sink->v_info, caps))
return FALSE;
if (!gtk_gst_gl_widget_set_caps (gtk_sink->widget, caps))
return FALSE;
return TRUE;
}
static GstFlowReturn
gst_gtk_gl_sink_show_frame (GstVideoSink * vsink, GstBuffer * buf)
{
GstGtkGLSink *gtk_sink;
GST_TRACE ("rendering buffer:%p", buf);
gtk_sink = GST_GTK_GL_SINK (vsink);
gtk_gst_gl_widget_set_buffer (gtk_sink->widget, buf);
return GST_FLOW_OK;
}
static gboolean
gst_gtk_gl_sink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
{
GstGtkGLSink *gtk_sink = GST_GTK_GL_SINK (bsink);
GstBufferPool *pool;
GstStructure *config;
GstCaps *caps;
guint size;
gboolean need_pool;
if (!gtk_sink->display || !gtk_sink->context)
return FALSE;
gst_query_parse_allocation (query, &caps, &need_pool);
if (caps == NULL)
goto no_caps;
if ((pool = gtk_sink->pool))
gst_object_ref (pool);
if (pool != NULL) {
GstCaps *pcaps;
/* we had a pool, check caps */
GST_DEBUG_OBJECT (gtk_sink, "check existing pool caps");
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_get_params (config, &pcaps, &size, NULL, NULL);
if (!gst_caps_is_equal (caps, pcaps)) {
GST_DEBUG_OBJECT (gtk_sink, "pool has different caps");
/* different caps, we can't use this pool */
gst_object_unref (pool);
pool = NULL;
}
gst_structure_free (config);
}
if (pool == NULL && need_pool) {
GstVideoInfo info;
if (!gst_video_info_from_caps (&info, caps))
goto invalid_caps;
GST_DEBUG_OBJECT (gtk_sink, "create new pool");
pool = gst_gl_buffer_pool_new (gtk_sink->context);
/* the normal size of a frame */
size = info.size;
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, size, 0, 0);
if (!gst_buffer_pool_set_config (pool, config))
goto config_failed;
}
/* we need at least 2 buffer because we hold on to the last one */
if (pool) {
gst_query_add_allocation_pool (query, pool, size, 2, 0);
gst_object_unref (pool);
}
/* we also support various metadata */
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, 0);
if (gtk_sink->context->gl_vtable->FenceSync)
gst_query_add_allocation_meta (query, GST_GL_SYNC_META_API_TYPE, 0);
return TRUE;
/* ERRORS */
no_caps:
{
GST_DEBUG_OBJECT (bsink, "no caps specified");
return FALSE;
}
invalid_caps:
{
GST_DEBUG_OBJECT (bsink, "invalid caps specified");
return FALSE;
}
config_failed:
{
GST_DEBUG_OBJECT (bsink, "failed setting config");
return FALSE;
}
}