/* * GStreamer * Copyright (C) 2015 Matthew Waters * * 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 GST_DEBUG_CATEGORY (gst_debug_ca_sink); #define GST_CAT_DEFAULT gst_debug_ca_sink #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") "; " GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META, "RGBA") "; " GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS)) ); 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 "); 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; g_assert (![NSThread isMainThread]); 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: { gboolean 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); 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); gst_gl_upload_release_buffer (ca_sink->upload); res = GST_BASE_SINK_CLASS (parent_class)->query (bsink, query); break; } default: res = GST_BASE_SINK_CLASS (parent_class)->query (bsink, query); break; } return res; } 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: 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->upload) { gst_object_unref (ca_sink->upload); ca_sink->upload = NULL; } if (ca_sink->convert) { gst_object_unref (ca_sink->convert); ca_sink->convert = 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; GstStructure *structure; GstBufferPool *newpool, *oldpool; GstCapsFeatures *gl_features; GstCaps *uploaded_caps; 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; newpool = gst_gl_buffer_pool_new (ca_sink->context); structure = gst_buffer_pool_get_config (newpool); gst_buffer_pool_config_set_params (structure, caps, vinfo.size, 2, 0); gst_buffer_pool_set_config (newpool, structure); oldpool = ca_sink->pool; /* we don't activate the pool yet, this will be done by downstream after it * has configured the pool. If downstream does not want our pool we will * activate it when we render into it */ ca_sink->pool = newpool; /* unref the old sink */ if (oldpool) { /* we don't deactivate, some elements might still be using it, it will * be deactivated when the last ref is gone */ gst_object_unref (oldpool); } if (ca_sink->upload) gst_object_unref (ca_sink->upload); ca_sink->upload = gst_gl_upload_new (ca_sink->context); gl_features = gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY); uploaded_caps = gst_caps_copy (caps); gst_caps_set_features (uploaded_caps, 0, gst_caps_features_copy (gl_features)); gst_gl_upload_set_caps (ca_sink->upload, caps, uploaded_caps); if (ca_sink->gl_caps) gst_caps_unref (ca_sink->gl_caps); ca_sink->gl_caps = gst_caps_copy (caps); gst_caps_set_simple (ca_sink->gl_caps, "format", G_TYPE_STRING, "RGBA", NULL); gst_caps_set_features (ca_sink->gl_caps, 0, gst_caps_features_copy (gl_features)); if (ca_sink->convert) gst_object_unref (ca_sink->convert); ca_sink->convert = gst_gl_color_convert_new (ca_sink->context); if (!gst_gl_color_convert_set_caps (ca_sink->convert, uploaded_caps, ca_sink->gl_caps)) { gst_caps_unref (uploaded_caps); gst_caps_features_free (gl_features); return FALSE; } gst_caps_unref (uploaded_caps); gst_caps_features_free (gl_features); ca_sink->caps_change = TRUE; return TRUE; } static GstFlowReturn gst_ca_opengl_layer_sink_prepare (GstBaseSink * bsink, GstBuffer * buf) { GstCAOpenGLLayerSink *ca_sink; GstBuffer *uploaded_buffer, *next_buffer = NULL; GstVideoFrame gl_frame; GstVideoInfo gl_info; 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_gl_upload_perform_with_buffer (ca_sink->upload, buf, &uploaded_buffer) != GST_GL_UPLOAD_DONE) goto upload_failed; if (!(next_buffer = gst_gl_color_convert_perform (ca_sink->convert, uploaded_buffer))) { gst_buffer_unref (uploaded_buffer); goto upload_failed; } gst_video_info_from_caps (&gl_info, ca_sink->gl_caps); if (!gst_video_frame_map (&gl_frame, &gl_info, next_buffer, GST_MAP_READ | GST_MAP_GL)) { gst_buffer_unref (uploaded_buffer); gst_buffer_unref (next_buffer); goto upload_failed; } gst_buffer_unref (uploaded_buffer); ca_sink->next_tex = *(guint *) gl_frame.data[0]; gst_buffer_replace (&ca_sink->next_buffer, next_buffer); gst_buffer_unref (next_buffer); 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)); gst_gl_upload_release_buffer (ca_sink->upload); 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); GstBufferPool *pool; GstStructure *config; GstCaps *caps; guint size; gboolean need_pool; GstStructure *gl_context; gchar *platform, *gl_apis; gpointer handle; GstAllocator *allocator = NULL; GstAllocationParams params; if (!_ensure_gl_setup (ca_sink)) return FALSE; gst_query_parse_allocation (query, &caps, &need_pool); if (caps == NULL) goto no_caps; if ((pool = ca_sink->pool)) gst_object_ref (pool); if (pool != NULL) { GstCaps *pcaps; /* we had a pool, check caps */ GST_DEBUG_OBJECT (ca_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 (ca_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 (ca_sink, "create new pool"); pool = gst_gl_buffer_pool_new (ca_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 (ca_sink->context->gl_vtable->FenceSync) gst_query_add_allocation_meta (query, GST_GL_SYNC_META_API_TYPE, 0); gl_apis = gst_gl_api_to_string (gst_gl_context_get_gl_api (ca_sink->context)); platform = gst_gl_platform_to_string (gst_gl_context_get_gl_platform (ca_sink->context)); handle = (gpointer) gst_gl_context_get_gl_context (ca_sink->context); gl_context = gst_structure_new ("GstVideoGLTextureUploadMeta", "gst.gl.GstGLContext", GST_GL_TYPE_CONTEXT, ca_sink->context, "gst.gl.context.handle", G_TYPE_POINTER, handle, "gst.gl.context.type", G_TYPE_STRING, platform, "gst.gl.context.apis", G_TYPE_STRING, gl_apis, NULL); gst_query_add_allocation_meta (query, GST_VIDEO_GL_TEXTURE_UPLOAD_META_API_TYPE, gl_context); g_free (gl_apis); g_free (platform); gst_structure_free (gl_context); gst_allocation_params_init (¶ms); allocator = gst_allocator_find (GST_GL_MEMORY_ALLOCATOR); gst_query_add_allocation_param (query, allocator, ¶ms); gst_object_unref (allocator); 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); }