| /* |
| * 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 retrieved 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) |
| { |
| gpointer *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 ("video/x-raw(" GST_CAPS_FEATURE_MEMORY_GL_MEMORY "), " |
| "format = (string) RGBA, " |
| "width = " GST_VIDEO_SIZE_RANGE ", " |
| "height = " GST_VIDEO_SIZE_RANGE ", " |
| "framerate = " GST_VIDEO_FPS_RANGE "," |
| "texture-target = (string) 2D") |
| ); |
| |
| 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_TYPE_GL_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_static_pad_template (element_class, &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->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); |
| |
| if (ca_sink->layer) { |
| CFRelease(ca_sink->layer); |
| ca_sink->layer = NULL; |
| } |
| |
| 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; |
| id layer; |
| |
| if (!ca_sink->layer) { |
| layer = [[NSClassFromString(@"GstGLCAOpenGLLayer") alloc] |
| initWithGstGLContext:ca_sink->context]; |
| |
| ca_sink->layer = (__bridge_retained gpointer)layer; |
| [layer setDrawCallback:(GstGLWindowCB)gst_ca_opengl_layer_sink_on_draw |
| data:ca_sink notify:NULL]; |
| [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) { |
| if (!gst_gl_display_create_context (ca_sink->display, |
| ca_sink->other_context, &ca_sink->context, &error)) { |
| goto context_error; |
| } |
| } |
| |
| if (!ca_sink->layer) |
| _invoke_on_main ((GstGLWindowCB) _create_layer, ca_sink); |
| |
| return TRUE; |
| |
| 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); |
| |
| switch (GST_QUERY_TYPE (query)) { |
| case GST_QUERY_CONTEXT: |
| { |
| if (gst_gl_handle_context_query ((GstElement *) ca_sink, query, |
| ca_sink->display, ca_sink->context, ca_sink->other_context)) |
| return TRUE; |
| break; |
| } |
| 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); |
| gst_buffer_replace (&ca_sink->next_sync, NULL); |
| |
| 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->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); |
| |
| GST_ELEMENT_CLASS (parent_class)->set_context (element, context); |
| } |
| |
| 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: |
| 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; |
| |
| gst_buffer_replace (&ca_sink->stored_sync, NULL); |
| |
| if (ca_sink->stored_buffer) { |
| gst_buffer_unref (ca_sink->stored_buffer); |
| ca_sink->stored_buffer = NULL; |
| } |
| gst_buffer_replace (&ca_sink->next_buffer, NULL); |
| gst_buffer_replace (&ca_sink->next_sync, NULL); |
| GST_CA_OPENGL_LAYER_SINK_UNLOCK (ca_sink); |
| |
| 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: |
| if (ca_sink->layer) { |
| CFRelease(ca_sink->layer); |
| ca_sink->layer = 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; |
| GstBuffer *next_sync, *old_sync, *old_buffer; |
| GstVideoFrame gl_frame; |
| GstGLSyncMeta *sync_meta; |
| |
| 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]; |
| |
| next_sync = gst_buffer_new (); |
| sync_meta = gst_buffer_add_gl_sync_meta (ca_sink->context, next_sync); |
| gst_gl_sync_meta_set_sync_point (sync_meta, ca_sink->context); |
| |
| GST_CA_OPENGL_LAYER_SINK_LOCK (ca_sink); |
| ca_sink->next_tex = *(guint *) gl_frame.data[0]; |
| |
| old_buffer = ca_sink->next_buffer; |
| ca_sink->next_buffer = gst_buffer_ref (buf); |
| |
| old_sync = ca_sink->next_sync; |
| ca_sink->next_sync = next_sync; |
| GST_CA_OPENGL_LAYER_SINK_UNLOCK (ca_sink); |
| |
| if (old_buffer) |
| gst_buffer_unref (old_buffer); |
| if (old_sync) |
| gst_buffer_unref (old_sync); |
| |
| 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, *old_sync; |
| |
| 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); |
| |
| old_sync = ca_sink->stored_sync; |
| ca_sink->stored_sync = gst_buffer_ref (ca_sink->next_sync); |
| GST_CA_OPENGL_LAYER_SINK_UNLOCK (ca_sink); |
| |
| /* The layer will automatically call the draw callback to draw the new |
| * content */ |
| [CATransaction begin]; |
| [(__bridge GstGLCAOpenGLLayer *)(ca_sink->layer) setNeedsDisplay]; |
| [CATransaction commit]; |
| |
| GST_TRACE ("post redisplay"); |
| |
| if (stored_buffer) |
| gst_buffer_unref (stored_buffer); |
| if (old_sync) |
| gst_buffer_unref (old_sync); |
| |
| 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); |
| GstBufferPool *pool = NULL; |
| GstStructure *config; |
| GstCaps *caps; |
| GstVideoInfo info; |
| 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 (!gst_video_info_from_caps (&info, caps)) |
| goto invalid_caps; |
| |
| /* the normal size of a frame */ |
| size = info.size; |
| |
| if (need_pool) { |
| GST_DEBUG_OBJECT (ca_sink, "create new pool"); |
| |
| pool = gst_gl_buffer_pool_new (ca_sink->context); |
| 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 */ |
| gst_query_add_allocation_pool (query, pool, size, 2, 0); |
| if (pool) |
| gst_object_unref (pool); |
| |
| 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 |
| }; |
| |
| static const GLushort indices[] = { 0, 1, 2, 0, 2, 3 }; |
| /* *INDENT-ON* */ |
| |
| static void |
| _bind_buffer (GstCAOpenGLLayerSink * ca_sink) |
| { |
| const GstGLFuncs *gl = ca_sink->context->gl_vtable; |
| |
| gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, ca_sink->vbo_indices); |
| gl->BindBuffer (GL_ARRAY_BUFFER, ca_sink->vertex_buffer); |
| |
| /* 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_ELEMENT_ARRAY_BUFFER, 0); |
| 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; |
| GError *error = NULL; |
| |
| if (!(ca_sink->redisplay_shader = gst_gl_shader_new_default (ca_sink->context, &error))) { |
| GST_ERROR_OBJECT (ca_sink, "Failed to link shader: %s", error->message); |
| gst_ca_opengl_layer_sink_cleanup_glthread (ca_sink); |
| return; |
| } |
| |
| ca_sink->attr_position = |
| gst_gl_shader_get_attribute_location (ca_sink->redisplay_shader, |
| "a_position"); |
| ca_sink->attr_texture = |
| gst_gl_shader_get_attribute_location (ca_sink->redisplay_shader, |
| "a_texcoord"); |
| |
| if (gl->GenVertexArrays) { |
| gl->GenVertexArrays (1, &ca_sink->vao); |
| gl->BindVertexArray (ca_sink->vao); |
| } |
| |
| if (!ca_sink->vertex_buffer) { |
| gl->GenBuffers (1, &ca_sink->vertex_buffer); |
| gl->BindBuffer (GL_ARRAY_BUFFER, ca_sink->vertex_buffer); |
| gl->BufferData (GL_ARRAY_BUFFER, 4 * 5 * sizeof (GLfloat), vertices, |
| GL_STATIC_DRAW); |
| } |
| |
| if (!ca_sink->vbo_indices) { |
| gl->GenBuffers (1, &ca_sink->vbo_indices); |
| gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, ca_sink->vbo_indices); |
| gl->BufferData (GL_ELEMENT_ARRAY_BUFFER, sizeof (indices), indices, |
| GL_STATIC_DRAW); |
| } |
| |
| if (gl->GenVertexArrays) { |
| _bind_buffer (ca_sink); |
| gl->BindVertexArray (0); |
| } |
| |
| gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, 0); |
| gl->BindBuffer (GL_ARRAY_BUFFER, 0); |
| } |
| |
| 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; |
| } |
| |
| if (ca_sink->vbo_indices) { |
| gl->DeleteBuffers (1, &ca_sink->vbo_indices); |
| ca_sink->vbo_indices = 0; |
| } |
| |
| if (ca_sink->vertex_buffer) { |
| gl->DeleteBuffers (1, &ca_sink->vertex_buffer); |
| ca_sink->vertex_buffer = 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; |
| GstGLSyncMeta *sync_meta; |
| |
| 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 = FALSE; |
| } |
| |
| sync_meta = gst_buffer_get_gl_sync_meta (ca_sink->stored_sync); |
| if (sync_meta) |
| gst_gl_sync_meta_wait (sync_meta, gst_gl_context_get_current ()); |
| |
| 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); |
| _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, 0); |
| |
| if (gl->GenVertexArrays) |
| gl->BindVertexArray (0); |
| _unbind_buffer (ca_sink); |
| |
| /* end default opengl scene */ |
| GST_CA_OPENGL_LAYER_SINK_UNLOCK (ca_sink); |
| } |