blob: 3656099bf46461978186e91ff17b0b571ad31692 [file] [log] [blame]
/*
* 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:element-caopengllayersink
*
* caopengllayersink renders incoming video frames to CAOpenGLLayer that
* can be retreived through the layer property and placed in the Core
* Animation render tree.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "caopengllayersink.h"
#include "gstglsinkbin.h"
#include <QuartzCore/QuartzCore.h>
GST_DEBUG_CATEGORY (gst_debug_ca_sink);
#define GST_CAT_DEFAULT gst_debug_ca_sink
typedef GstGLSinkBin GstCAOpenGLLayerSinkBin;
typedef GstGLSinkBinClass GstCAOpenGLLayerSinkBinClass;
G_DEFINE_TYPE (GstCAOpenGLLayerSinkBin, gst_ca_opengl_layer_sink_bin,
GST_TYPE_GL_SINK_BIN);
enum
{
PROP_BIN_0,
PROP_BIN_QOS,
PROP_BIN_FORCE_ASPECT_RATIO,
PROP_BIN_LAST_SAMPLE,
PROP_BIN_LAYER,
};
static void
_on_notify_layer (GObject * object, GParamSpec *pspec, gpointer user_data)
{
GstCAOpenGLLayerSinkBin *self = user_data;
g_object_notify (G_OBJECT (self), "layer");
}
static void
gst_ca_opengl_layer_sink_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * param_spec)
{
g_object_set_property (G_OBJECT (GST_GL_SINK_BIN (object)->sink),
param_spec->name, value);
}
static void
gst_ca_opengl_layer_sink_bin_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * param_spec)
{
g_object_get_property (G_OBJECT (GST_GL_SINK_BIN (object)->sink),
param_spec->name, value);
}
static void
gst_ca_opengl_layer_sink_bin_init (GstCAOpenGLLayerSinkBin * self)
{
GstGLCAOpenGLLayer *sink = g_object_new (GST_TYPE_CA_OPENGL_LAYER_SINK, NULL);
g_signal_connect (sink, "notify::layer", G_CALLBACK (_on_notify_layer), self);
gst_gl_sink_bin_finish_init_with_element (GST_GL_SINK_BIN (self),
GST_ELEMENT (sink));
}
static void
gst_ca_opengl_layer_sink_bin_class_init (GstCAOpenGLLayerSinkBinClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->get_property = gst_ca_opengl_layer_sink_bin_get_property;
gobject_class->set_property = gst_ca_opengl_layer_sink_bin_set_property;
g_object_class_install_property (gobject_class, PROP_BIN_FORCE_ASPECT_RATIO,
g_param_spec_boolean ("force-aspect-ratio",
"Force aspect ratio",
"When enabled, scaling will respect original aspect ratio", TRUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BIN_LAST_SAMPLE,
g_param_spec_boxed ("last-sample", "Last Sample",
"The last sample received in the sink", GST_TYPE_SAMPLE,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BIN_LAYER,
g_param_spec_pointer ("layer", "CAOpenGLLayer",
"OpenGL Core Animation layer",
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BIN_QOS,
g_param_spec_boolean ("qos", "Quality of Service",
"Generate Quality-of-Service events upstream", TRUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
#define GST_CA_OPENGL_LAYER_SINK_GET_LOCK(glsink) \
(GST_CA_OPENGL_LAYER_SINK(glsink)->drawing_lock)
#define GST_CA_OPENGL_LAYER_SINK_LOCK(glsink) \
(g_mutex_lock(&GST_CA_OPENGL_LAYER_SINK_GET_LOCK (glsink)))
#define GST_CA_OPENGL_LAYER_SINK_UNLOCK(glsink) \
(g_mutex_unlock(&GST_CA_OPENGL_LAYER_SINK_GET_LOCK (glsink)))
#define USING_OPENGL(context) (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL, 1, 0))
#define USING_OPENGL3(context) (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL3, 3, 1))
#define USING_GLES(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES, 1, 0))
#define USING_GLES2(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 2, 0))
#define USING_GLES3(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 3, 0))
#define SUPPORTED_GL_APIS GST_GL_API_OPENGL | GST_GL_API_GLES2 | GST_GL_API_OPENGL3
static void gst_ca_opengl_layer_sink_thread_init_redisplay (GstCAOpenGLLayerSink * ca_sink);
static void gst_ca_opengl_layer_sink_cleanup_glthread (GstCAOpenGLLayerSink * ca_sink);
static void gst_ca_opengl_layer_sink_on_resize (GstCAOpenGLLayerSink * ca_sink,
gint width, gint height);
static void gst_ca_opengl_layer_sink_on_draw (GstCAOpenGLLayerSink * ca_sink);
static void gst_ca_opengl_layer_sink_finalize (GObject * object);
static void gst_ca_opengl_layer_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * param_spec);
static void gst_ca_opengl_layer_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * param_spec);
static gboolean gst_ca_opengl_layer_sink_stop (GstBaseSink * bsink);
static gboolean gst_ca_opengl_layer_sink_query (GstBaseSink * bsink, GstQuery * query);
static void gst_ca_opengl_layer_sink_set_context (GstElement * element,
GstContext * context);
static GstStateChangeReturn gst_ca_opengl_layer_sink_change_state (GstElement *
element, GstStateChange transition);
static void gst_ca_opengl_layer_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
GstClockTime * start, GstClockTime * end);
static gboolean gst_ca_opengl_layer_sink_set_caps (GstBaseSink * bsink, GstCaps * caps);
static GstFlowReturn gst_ca_opengl_layer_sink_prepare (GstBaseSink * bsink,
GstBuffer * buf);
static GstFlowReturn gst_ca_opengl_layer_sink_show_frame (GstVideoSink * bsink,
GstBuffer * buf);
static gboolean gst_ca_opengl_layer_sink_propose_allocation (GstBaseSink * bsink,
GstQuery * query);
static GstStaticPadTemplate gst_ca_opengl_layer_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_FORCE_ASPECT_RATIO,
PROP_CONTEXT,
PROP_LAYER,
};
#define gst_ca_opengl_layer_sink_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstCAOpenGLLayerSink, gst_ca_opengl_layer_sink,
GST_TYPE_VIDEO_SINK, GST_DEBUG_CATEGORY_INIT (gst_debug_ca_sink,
"caopengllayersink", 0, "CAOpenGLLayer Video Sink"));
static void
gst_ca_opengl_layer_sink_class_init (GstCAOpenGLLayerSinkClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseSinkClass *gstbasesink_class;
GstVideoSinkClass *gstvideosink_class;
GstElementClass *element_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbasesink_class = (GstBaseSinkClass *) klass;
gstvideosink_class = (GstVideoSinkClass *) klass;
element_class = GST_ELEMENT_CLASS (klass);
gobject_class->set_property = gst_ca_opengl_layer_sink_set_property;
gobject_class->get_property = gst_ca_opengl_layer_sink_get_property;
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", TRUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CONTEXT,
g_param_spec_object ("context",
"OpenGL context",
"Get OpenGL context",
GST_GL_TYPE_CONTEXT, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_LAYER,
g_param_spec_pointer ("layer", "CAOpenGLLayer",
"OpenGL Core Animation layer",
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_metadata (element_class, "CAOpenGLLayer video sink",
"Sink/Video", "A video sink based on CAOpenGLLayer",
"Matthew Waters <matthew@centricular.com>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_ca_opengl_layer_sink_template));
gobject_class->finalize = gst_ca_opengl_layer_sink_finalize;
gstelement_class->change_state = gst_ca_opengl_layer_sink_change_state;
gstelement_class->set_context = gst_ca_opengl_layer_sink_set_context;
gstbasesink_class->query = GST_DEBUG_FUNCPTR (gst_ca_opengl_layer_sink_query);
gstbasesink_class->set_caps = gst_ca_opengl_layer_sink_set_caps;
gstbasesink_class->get_times = gst_ca_opengl_layer_sink_get_times;
gstbasesink_class->prepare = gst_ca_opengl_layer_sink_prepare;
gstbasesink_class->propose_allocation = gst_ca_opengl_layer_sink_propose_allocation;
gstbasesink_class->stop = gst_ca_opengl_layer_sink_stop;
gstvideosink_class->show_frame =
GST_DEBUG_FUNCPTR (gst_ca_opengl_layer_sink_show_frame);
}
static void
gst_ca_opengl_layer_sink_init (GstCAOpenGLLayerSink * ca_sink)
{
ca_sink->display = NULL;
ca_sink->keep_aspect_ratio = TRUE;
ca_sink->pool = NULL;
ca_sink->stored_buffer = NULL;
ca_sink->redisplay_texture = 0;
g_mutex_init (&ca_sink->drawing_lock);
}
static void
gst_ca_opengl_layer_sink_finalize (GObject * object)
{
GstCAOpenGLLayerSink *ca_sink;
g_return_if_fail (GST_IS_CA_OPENGL_LAYER_SINK (object));
ca_sink = GST_CA_OPENGL_LAYER_SINK (object);
g_mutex_clear (&ca_sink->drawing_lock);
GST_DEBUG ("finalized");
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_ca_opengl_layer_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstCAOpenGLLayerSink *ca_sink;
g_return_if_fail (GST_IS_CA_OPENGL_LAYER_SINK (object));
ca_sink = GST_CA_OPENGL_LAYER_SINK (object);
switch (prop_id) {
case PROP_FORCE_ASPECT_RATIO:
{
ca_sink->keep_aspect_ratio = g_value_get_boolean (value);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_ca_opengl_layer_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstCAOpenGLLayerSink *ca_sink;
g_return_if_fail (GST_IS_CA_OPENGL_LAYER_SINK (object));
ca_sink = GST_CA_OPENGL_LAYER_SINK (object);
switch (prop_id) {
case PROP_FORCE_ASPECT_RATIO:
g_value_set_boolean (value, ca_sink->keep_aspect_ratio);
break;
case PROP_CONTEXT:
g_value_set_object (value, ca_sink->context);
break;
case PROP_LAYER:
g_value_set_pointer (value, ca_sink->layer);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
_create_layer (gpointer data)
{
GstCAOpenGLLayerSink *ca_sink = data;
if (!ca_sink->layer) {
ca_sink->layer = [[NSClassFromString(@"GstGLCAOpenGLLayer") alloc]
initWithGstGLContext:GST_GL_CONTEXT_COCOA (ca_sink->context)];
[ca_sink->layer setDrawCallback:(GstGLWindowCB)gst_ca_opengl_layer_sink_on_draw
data:ca_sink notify:NULL];
[ca_sink->layer setResizeCallback:(GstGLWindowResizeCB)gst_ca_opengl_layer_sink_on_resize
data:ca_sink notify:NULL];
g_object_notify (G_OBJECT (ca_sink), "layer");
}
}
static void
_invoke_on_main (GstGLWindowCB func, gpointer data)
{
if ([NSThread isMainThread]) {
func (data);
} else {
dispatch_sync (dispatch_get_main_queue (), ^{
func (data);
});
}
}
static gboolean
_ensure_gl_setup (GstCAOpenGLLayerSink * ca_sink)
{
GError *error = NULL;
if (!gst_gl_ensure_element_data (ca_sink, &ca_sink->display,
&ca_sink->other_context))
return FALSE;
gst_gl_display_filter_gl_api (ca_sink->display, SUPPORTED_GL_APIS);
if (!ca_sink->context) {
ca_sink->context = gst_gl_context_new (ca_sink->display);
if (!ca_sink->context)
goto context_creation_error;
if (!gst_gl_context_create (ca_sink->context, ca_sink->other_context,
&error)) {
goto context_error;
}
}
if (!ca_sink->layer)
_invoke_on_main ((GstGLWindowCB) _create_layer, ca_sink);
return TRUE;
context_creation_error:
{
GST_ELEMENT_ERROR (ca_sink, RESOURCE, NOT_FOUND,
("Failed to create GL context"), (NULL));
return FALSE;
}
context_error:
{
GST_ELEMENT_ERROR (ca_sink, RESOURCE, NOT_FOUND, ("%s", error->message),
(NULL));
gst_object_unref (ca_sink->context);
ca_sink->context = NULL;
return FALSE;
}
}
static gboolean
gst_ca_opengl_layer_sink_query (GstBaseSink * bsink, GstQuery * query)
{
GstCAOpenGLLayerSink *ca_sink = GST_CA_OPENGL_LAYER_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 *) ca_sink, query,
&ca_sink->display, &ca_sink->other_context);
if (ca_sink->display)
gst_gl_display_filter_gl_api (ca_sink->display, SUPPORTED_GL_APIS);
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,
ca_sink->context, NULL);
gst_query_set_context (query, context);
gst_context_unref (context);
ret = ca_sink->context != NULL;
}
GST_DEBUG_OBJECT (ca_sink, "context query of type %s %i",
context_type, ret);
if (ret)
return ret;
}
case GST_QUERY_DRAIN:
{
GstBuffer *buf = NULL;
GST_CA_OPENGL_LAYER_SINK_LOCK (ca_sink);
ca_sink->redisplay_texture = 0;
buf = ca_sink->stored_buffer;
ca_sink->stored_buffer = NULL;
GST_CA_OPENGL_LAYER_SINK_UNLOCK (ca_sink);
if (buf)
gst_buffer_unref (buf);
gst_buffer_replace (&ca_sink->next_buffer, NULL);
res = GST_BASE_SINK_CLASS (parent_class)->query (bsink, query);
break;
}
default:
break;
}
return GST_BASE_SINK_CLASS (parent_class)->query (bsink, query);
}
static gboolean
gst_ca_opengl_layer_sink_stop (GstBaseSink * bsink)
{
GstCAOpenGLLayerSink *ca_sink = GST_CA_OPENGL_LAYER_SINK (bsink);
if (ca_sink->pool) {
gst_object_unref (ca_sink->pool);
ca_sink->pool = NULL;
}
if (ca_sink->gl_caps) {
gst_caps_unref (ca_sink->gl_caps);
ca_sink->gl_caps = NULL;
}
return TRUE;
}
static void
gst_ca_opengl_layer_sink_set_context (GstElement * element, GstContext * context)
{
GstCAOpenGLLayerSink *ca_sink = GST_CA_OPENGL_LAYER_SINK (element);
gst_gl_handle_set_context (element, context, &ca_sink->display,
&ca_sink->other_context);
if (ca_sink->display)
gst_gl_display_filter_gl_api (ca_sink->display, SUPPORTED_GL_APIS);
}
static GstStateChangeReturn
gst_ca_opengl_layer_sink_change_state (GstElement * element, GstStateChange transition)
{
GstCAOpenGLLayerSink *ca_sink;
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)));
ca_sink = GST_CA_OPENGL_LAYER_SINK (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
_ensure_gl_setup (ca_sink);
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
g_atomic_int_set (&ca_sink->to_quit, 0);
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:
{
/* mark the redisplay_texture as unavailable (=0)
* to avoid drawing
*/
GST_CA_OPENGL_LAYER_SINK_LOCK (ca_sink);
ca_sink->redisplay_texture = 0;
if (ca_sink->stored_buffer) {
gst_buffer_unref (ca_sink->stored_buffer);
ca_sink->stored_buffer = NULL;
}
GST_CA_OPENGL_LAYER_SINK_UNLOCK (ca_sink);
gst_buffer_replace (&ca_sink->next_buffer, NULL);
if (ca_sink->pool) {
gst_buffer_pool_set_active (ca_sink->pool, FALSE);
gst_object_unref (ca_sink->pool);
ca_sink->pool = NULL;
}
GST_VIDEO_SINK_WIDTH (ca_sink) = 1;
GST_VIDEO_SINK_HEIGHT (ca_sink) = 1;
if (ca_sink->context) {
gst_object_unref (ca_sink->context);
ca_sink->context = NULL;
}
if (ca_sink->display) {
gst_object_unref (ca_sink->display);
ca_sink->display = NULL;
}
break;
}
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
static void
gst_ca_opengl_layer_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
GstClockTime * start, GstClockTime * end)
{
GstCAOpenGLLayerSink *ca_sink;
ca_sink = GST_CA_OPENGL_LAYER_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 (&ca_sink->info) > 0) {
*end = *start +
gst_util_uint64_scale_int (GST_SECOND,
GST_VIDEO_INFO_FPS_D (&ca_sink->info),
GST_VIDEO_INFO_FPS_N (&ca_sink->info));
}
}
}
}
static gboolean
gst_ca_opengl_layer_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
{
GstCAOpenGLLayerSink *ca_sink;
gint width;
gint height;
gboolean ok;
gint par_n, par_d;
gint display_par_n, display_par_d;
guint display_ratio_num, display_ratio_den;
GstVideoInfo vinfo;
GST_DEBUG ("set caps with %" GST_PTR_FORMAT, caps);
ca_sink = GST_CA_OPENGL_LAYER_SINK (bsink);
ok = gst_video_info_from_caps (&vinfo, caps);
if (!ok)
return FALSE;
width = GST_VIDEO_INFO_WIDTH (&vinfo);
height = GST_VIDEO_INFO_HEIGHT (&vinfo);
par_n = GST_VIDEO_INFO_PAR_N (&vinfo);
par_d = GST_VIDEO_INFO_PAR_D (&vinfo);
if (!par_n)
par_n = 1;
display_par_n = 1;
display_par_d = 1;
ok = gst_video_calculate_display_ratio (&display_ratio_num,
&display_ratio_den, width, height, par_n, par_d, display_par_n,
display_par_d);
if (!ok)
return FALSE;
GST_TRACE ("PAR: %u/%u DAR:%u/%u", par_n, par_d, display_par_n,
display_par_d);
if (height % display_ratio_den == 0) {
GST_DEBUG ("keeping video height");
GST_VIDEO_SINK_WIDTH (ca_sink) = (guint)
gst_util_uint64_scale_int (height, display_ratio_num,
display_ratio_den);
GST_VIDEO_SINK_HEIGHT (ca_sink) = height;
} else if (width % display_ratio_num == 0) {
GST_DEBUG ("keeping video width");
GST_VIDEO_SINK_WIDTH (ca_sink) = width;
GST_VIDEO_SINK_HEIGHT (ca_sink) = (guint)
gst_util_uint64_scale_int (width, display_ratio_den, display_ratio_num);
} else {
GST_DEBUG ("approximating while keeping video height");
GST_VIDEO_SINK_WIDTH (ca_sink) = (guint)
gst_util_uint64_scale_int (height, display_ratio_num,
display_ratio_den);
GST_VIDEO_SINK_HEIGHT (ca_sink) = height;
}
GST_DEBUG ("scaling to %dx%d", GST_VIDEO_SINK_WIDTH (ca_sink),
GST_VIDEO_SINK_HEIGHT (ca_sink));
ca_sink->info = vinfo;
if (!_ensure_gl_setup (ca_sink))
return FALSE;
ca_sink->caps_change = TRUE;
return TRUE;
}
static GstFlowReturn
gst_ca_opengl_layer_sink_prepare (GstBaseSink * bsink, GstBuffer * buf)
{
GstCAOpenGLLayerSink *ca_sink;
GstVideoFrame gl_frame;
ca_sink = GST_CA_OPENGL_LAYER_SINK (bsink);
GST_TRACE ("preparing buffer:%p", buf);
if (GST_VIDEO_SINK_WIDTH (ca_sink) < 1 ||
GST_VIDEO_SINK_HEIGHT (ca_sink) < 1) {
return GST_FLOW_NOT_NEGOTIATED;
}
if (!_ensure_gl_setup (ca_sink))
return GST_FLOW_NOT_NEGOTIATED;
if (!gst_video_frame_map (&gl_frame, &ca_sink->info, buf,
GST_MAP_READ | GST_MAP_GL)) {
goto upload_failed;
}
ca_sink->next_tex = *(guint *) gl_frame.data[0];
gst_buffer_replace (&ca_sink->next_buffer, buf);
gst_video_frame_unmap (&gl_frame);
return GST_FLOW_OK;
upload_failed:
{
GST_ELEMENT_ERROR (ca_sink, RESOURCE, NOT_FOUND,
("%s", "Failed to upload buffer"), (NULL));
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
gst_ca_opengl_layer_sink_show_frame (GstVideoSink * vsink, GstBuffer * buf)
{
GstCAOpenGLLayerSink *ca_sink;
GstBuffer *stored_buffer;
GST_TRACE ("rendering buffer:%p", buf);
ca_sink = GST_CA_OPENGL_LAYER_SINK (vsink);
GST_TRACE ("redisplay texture:%u of size:%ux%u, window size:%ux%u",
ca_sink->next_tex, GST_VIDEO_INFO_WIDTH (&ca_sink->info),
GST_VIDEO_INFO_HEIGHT (&ca_sink->info),
GST_VIDEO_SINK_WIDTH (ca_sink),
GST_VIDEO_SINK_HEIGHT (ca_sink));
/* Avoid to release the texture while drawing */
GST_CA_OPENGL_LAYER_SINK_LOCK (ca_sink);
ca_sink->redisplay_texture = ca_sink->next_tex;
stored_buffer = ca_sink->stored_buffer;
ca_sink->stored_buffer = gst_buffer_ref (ca_sink->next_buffer);
GST_CA_OPENGL_LAYER_SINK_UNLOCK (ca_sink);
/* The layer will automatically call the draw callback to draw the new
* content */
[CATransaction begin];
[ca_sink->layer setNeedsDisplay];
[CATransaction commit];
GST_TRACE ("post redisplay");
if (stored_buffer)
gst_buffer_unref (stored_buffer);
if (g_atomic_int_get (&ca_sink->to_quit) != 0) {
GST_ELEMENT_ERROR (ca_sink, RESOURCE, NOT_FOUND,
("%s", gst_gl_context_get_error ()), (NULL));
return GST_FLOW_ERROR;
}
return GST_FLOW_OK;
}
static gboolean
gst_ca_opengl_layer_sink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
{
GstCAOpenGLLayerSink *ca_sink = GST_CA_OPENGL_LAYER_SINK (bsink);
GstStructure *config;
GstCaps *caps;
guint size;
gboolean need_pool;
if (!_ensure_gl_setup (ca_sink))
return FALSE;
gst_query_parse_allocation (query, &caps, &need_pool);
if (caps == NULL)
goto no_caps;
if (need_pool) {
GstVideoInfo info;
if (!gst_video_info_from_caps (&info, caps))
goto invalid_caps;
/* the normal size of a frame */
size = info.size;
if (ca_sink->pool) {
GstCaps *pcaps;
/* we had a pool, check caps */
GST_DEBUG_OBJECT (ca_sink, "check existing pool caps");
config = gst_buffer_pool_get_config (ca_sink->pool);
gst_buffer_pool_config_get_params (config, &pcaps, &size, NULL, NULL);
if (!gst_caps_is_equal (caps, pcaps)) {
GST_DEBUG_OBJECT (ca_sink, "pool has different caps");
/* different caps, we can't use this pool */
gst_object_unref (ca_sink->pool);
ca_sink->pool = NULL;
}
gst_structure_free (config);
}
if (ca_sink->pool == NULL) {
GST_DEBUG_OBJECT (ca_sink, "create new pool");
ca_sink->pool = gst_gl_buffer_pool_new (ca_sink->context);
config = gst_buffer_pool_get_config (ca_sink->pool);
gst_buffer_pool_config_set_params (config, caps, size, 0, 0);
if (!gst_buffer_pool_set_config (ca_sink->pool, config))
goto config_failed;
}
/* we need at least 2 buffer because we hold on to the last one */
gst_query_add_allocation_pool (query, ca_sink->pool, size, 2, 0);
}
if (ca_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;
}
}
/* *INDENT-OFF* */
static const GLfloat vertices[] = {
1.0f, 1.0f, 0.0f, 1.0f, 0.0f,
-1.0f, 1.0f, 0.0f, 0.0f, 0.0f,
-1.0f, -1.0f, 0.0f, 0.0f, 1.0f,
1.0f, -1.0f, 0.0f, 1.0f, 1.0f
};
/* *INDENT-ON* */
static void
_bind_buffer (GstCAOpenGLLayerSink * ca_sink)
{
const GstGLFuncs *gl = ca_sink->context->gl_vtable;
gl->BindBuffer (GL_ARRAY_BUFFER, ca_sink->vertex_buffer);
gl->BufferData (GL_ARRAY_BUFFER, 4 * 5 * sizeof (GLfloat), vertices,
GL_STATIC_DRAW);
/* Load the vertex position */
gl->VertexAttribPointer (ca_sink->attr_position, 3, GL_FLOAT, GL_FALSE,
5 * sizeof (GLfloat), (void *) 0);
/* Load the texture coordinate */
gl->VertexAttribPointer (ca_sink->attr_texture, 2, GL_FLOAT, GL_FALSE,
5 * sizeof (GLfloat), (void *) (3 * sizeof (GLfloat)));
gl->EnableVertexAttribArray (ca_sink->attr_position);
gl->EnableVertexAttribArray (ca_sink->attr_texture);
}
static void
_unbind_buffer (GstCAOpenGLLayerSink * ca_sink)
{
const GstGLFuncs *gl = ca_sink->context->gl_vtable;
gl->BindBuffer (GL_ARRAY_BUFFER, 0);
gl->DisableVertexAttribArray (ca_sink->attr_position);
gl->DisableVertexAttribArray (ca_sink->attr_texture);
}
/* Called in the gl thread */
static void
gst_ca_opengl_layer_sink_thread_init_redisplay (GstCAOpenGLLayerSink * ca_sink)
{
const GstGLFuncs *gl = ca_sink->context->gl_vtable;
ca_sink->redisplay_shader = gst_gl_shader_new (ca_sink->context);
if (!gst_gl_shader_compile_with_default_vf_and_check
(ca_sink->redisplay_shader, &ca_sink->attr_position,
&ca_sink->attr_texture))
gst_ca_opengl_layer_sink_cleanup_glthread (ca_sink);
if (gl->GenVertexArrays) {
gl->GenVertexArrays (1, &ca_sink->vao);
gl->BindVertexArray (ca_sink->vao);
}
gl->GenBuffers (1, &ca_sink->vertex_buffer);
_bind_buffer (ca_sink);
if (gl->GenVertexArrays) {
gl->BindVertexArray (0);
gl->BindBuffer (GL_ARRAY_BUFFER, 0);
} else {
_unbind_buffer (ca_sink);
}
}
static void
gst_ca_opengl_layer_sink_cleanup_glthread (GstCAOpenGLLayerSink * ca_sink)
{
const GstGLFuncs *gl = ca_sink->context->gl_vtable;
if (ca_sink->redisplay_shader) {
gst_object_unref (ca_sink->redisplay_shader);
ca_sink->redisplay_shader = NULL;
}
if (ca_sink->vao) {
gl->DeleteVertexArrays (1, &ca_sink->vao);
ca_sink->vao = 0;
}
}
static void
gst_ca_opengl_layer_sink_on_resize (GstCAOpenGLLayerSink * ca_sink, gint width, gint height)
{
/* Here ca_sink members (ex:ca_sink->info) have a life time of set_caps.
* It means that they cannot not change between two set_caps
*/
const GstGLFuncs *gl = ca_sink->context->gl_vtable;
GST_TRACE ("GL Window resized to %ux%u", width, height);
width = MAX (1, width);
height = MAX (1, height);
ca_sink->window_width = width;
ca_sink->window_height = height;
/* default reshape */
if (ca_sink->keep_aspect_ratio) {
GstVideoRectangle src, dst, result;
src.x = 0;
src.y = 0;
src.w = GST_VIDEO_SINK_WIDTH (ca_sink);
src.h = GST_VIDEO_SINK_HEIGHT (ca_sink);
dst.x = 0;
dst.y = 0;
dst.w = width;
dst.h = height;
gst_video_sink_center_rect (src, dst, &result, TRUE);
gl->Viewport (result.x, result.y, result.w, result.h);
} else {
gl->Viewport (0, 0, width, height);
}
}
static void
gst_ca_opengl_layer_sink_on_draw (GstCAOpenGLLayerSink * ca_sink)
{
/* Here ca_sink members (ex:ca_sink->info) have a life time of set_caps.
* It means that they cannot not change between two set_caps as well as
* for the redisplay_texture size.
* Whereas redisplay_texture id changes every sink_render
*/
const GstGLFuncs *gl = NULL;
GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
g_return_if_fail (GST_IS_CA_OPENGL_LAYER_SINK (ca_sink));
gl = ca_sink->context->gl_vtable;
GST_CA_OPENGL_LAYER_SINK_LOCK (ca_sink);
if (G_UNLIKELY (!ca_sink->redisplay_shader)) {
gst_ca_opengl_layer_sink_thread_init_redisplay (ca_sink);
}
/* check if texture is ready for being drawn */
if (!ca_sink->redisplay_texture) {
gl->ClearColor (0.0f, 0.0f, 0.0f, 1.0f);
gl->Clear (GL_COLOR_BUFFER_BIT);
GST_CA_OPENGL_LAYER_SINK_UNLOCK (ca_sink);
return;
}
/* opengl scene */
GST_TRACE ("redrawing texture:%u", ca_sink->redisplay_texture);
if (ca_sink->caps_change) {
GST_CA_OPENGL_LAYER_SINK_UNLOCK (ca_sink);
gst_ca_opengl_layer_sink_on_resize (ca_sink, ca_sink->window_width,
ca_sink->window_height);
GST_CA_OPENGL_LAYER_SINK_LOCK (ca_sink);
ca_sink->caps_change = TRUE;
}
#if GST_GL_HAVE_OPENGL
if (USING_OPENGL (ca_sink->context))
gl->Disable (GL_TEXTURE_2D);
#endif
gl->BindTexture (GL_TEXTURE_2D, 0);
gl->ClearColor (0.0, 0.0, 0.0, 0.0);
gl->Clear (GL_COLOR_BUFFER_BIT);
gst_gl_shader_use (ca_sink->redisplay_shader);
if (gl->GenVertexArrays)
gl->BindVertexArray (ca_sink->vao);
else
_bind_buffer (ca_sink);
gl->ActiveTexture (GL_TEXTURE0);
gl->BindTexture (GL_TEXTURE_2D, ca_sink->redisplay_texture);
gst_gl_shader_set_uniform_1i (ca_sink->redisplay_shader, "tex", 0);
gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
if (gl->GenVertexArrays)
gl->BindVertexArray (0);
else
_unbind_buffer (ca_sink);
/* end default opengl scene */
GST_CA_OPENGL_LAYER_SINK_UNLOCK (ca_sink);
}