/* * GStreamer * Copyright (C) 2003 Julien Moutte * Copyright (C) 2005,2006,2007 David A. Schleef * Copyright (C) 2008 Julien Isorce * * 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-glimagesink * * glimagesink renders video frames to a drawable on a local or remote * display using OpenGL. This element can receive a Window ID from the * application through the VideoOverlay interface and will then render video * frames in this drawable. * If no Window ID was provided by the application, the element will * create its own internal window and render into it. * * * Scaling * * Depends on the driver, OpenGL handles hardware accelerated * scaling of video frames. This means that the element will just accept * incoming video frames no matter their geometry and will then put them to the * drawable scaling them on the fly. Using the #GstGLImageSink:force-aspect-ratio * property it is possible to enforce scaling with a constant aspect ratio, * which means drawing black borders around the video frame. * * * * Events * * Through the gl thread, glimagesink handle some events coming from the drawable * to manage its appearance even when the data is not flowing (GST_STATE_PAUSED). * That means that even when the element is paused, it will receive expose events * from the drawable and draw the latest frame with correct borders/aspect-ratio. * * * * Examples * |[ * gst-launch -v videotestsrc ! "video/x-raw-rgb" ! glimagesink * ]| A pipeline to test hardware scaling. * No special opengl extension is used in this pipeline, that's why it should work * with OpenGL >= 1.1. That's the case if you are using the MESA3D driver v1.3. * |[ * gst-launch -v videotestsrc ! "video/x-raw-yuv, format=(fourcc)I420" ! glimagesink * ]| A pipeline to test hardware scaling and hardware colorspace conversion. * When your driver supports GLSL (OpenGL Shading Language needs OpenGL >= 2.1), * the 4 following format YUY2, UYVY, I420, YV12 and AYUV are converted to RGB32 * through some fragment shaders and using one framebuffer (FBO extension OpenGL >= 1.4). * If your driver does not support GLSL but supports MESA_YCbCr extension then * the you can use YUY2 and UYVY. In this case the colorspace conversion is automatically * made when loading the texture and therefore no framebuffer is used. * |[ * gst-launch -v gltestsrc ! glimagesink * ]| A pipeline 100% OpenGL. * No special opengl extension is used in this pipeline, that's why it should work * with OpenGL >= 1.1. That's the case if you are using the MESA3D driver v1.3. * |[ * gst-plugins-gl/tests/examples/generic/cube * ]| The graphic FPS scene can be greater than the input video FPS. * The graphic scene can be written from a client code through the * two glfilterapp properties. * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "gstglimagesink.h" #if GST_GL_HAVE_PLATFORM_EGL #include #endif GST_DEBUG_CATEGORY (gst_debug_glimage_sink); #define GST_CAT_DEFAULT gst_debug_glimage_sink #define GST_GLIMAGE_SINK_GET_LOCK(glsink) \ (GST_GLIMAGE_SINK(glsink)->drawing_lock) #define GST_GLIMAGE_SINK_LOCK(glsink) \ (g_mutex_lock(&GST_GLIMAGE_SINK_GET_LOCK (glsink))) #define GST_GLIMAGE_SINK_UNLOCK(glsink) \ (g_mutex_unlock(&GST_GLIMAGE_SINK_GET_LOCK (glsink))) #define USING_OPENGL(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_OPENGL) #define USING_OPENGL3(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_OPENGL3) #define USING_GLES(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_GLES) #define USING_GLES2(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_GLES2) #define USING_GLES3(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_GLES3) #if GST_GL_HAVE_GLES2 static void gst_glimage_sink_thread_init_redisplay (GstGLImageSink * gl_sink); #endif static void gst_glimage_sink_on_close (GstGLImageSink * gl_sink); static void gst_glimage_sink_on_resize (const GstGLImageSink * gl_sink, gint width, gint height); static void gst_glimage_sink_on_draw (const GstGLImageSink * gl_sink); static gboolean gst_glimage_sink_redisplay (GstGLImageSink * gl_sink); static void gst_glimage_sink_finalize (GObject * object); static void gst_glimage_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * param_spec); static void gst_glimage_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * param_spec); static gboolean gst_glimage_sink_stop (GstBaseSink * bsink); static gboolean gst_glimage_sink_query (GstBaseSink * bsink, GstQuery * query); static void gst_glimage_sink_set_context (GstElement * element, GstContext * context); static GstStateChangeReturn gst_glimage_sink_change_state (GstElement * element, GstStateChange transition); static void gst_glimage_sink_get_times (GstBaseSink * bsink, GstBuffer * buf, GstClockTime * start, GstClockTime * end); static gboolean gst_glimage_sink_set_caps (GstBaseSink * bsink, GstCaps * caps); static GstFlowReturn gst_glimage_sink_prepare (GstBaseSink * bsink, GstBuffer * buf); static GstFlowReturn gst_glimage_sink_render (GstBaseSink * bsink, GstBuffer * buf); static gboolean gst_glimage_sink_propose_allocation (GstBaseSink * bsink, GstQuery * query); static void gst_glimage_sink_video_overlay_init (GstVideoOverlayInterface * iface); static void gst_glimage_sink_set_window_handle (GstVideoOverlay * overlay, guintptr id); static void gst_glimage_sink_expose (GstVideoOverlay * overlay); #if GST_GL_HAVE_GLES2 /* *INDENT-OFF* */ static const gchar *redisplay_vertex_shader_str_gles2 = "attribute vec4 a_position; \n" "attribute vec2 a_texCoord; \n" "varying vec2 v_texCoord; \n" "void main() \n" "{ \n" " gl_Position = a_position; \n" " v_texCoord = a_texCoord; \n" "} \n"; static const gchar *redisplay_fragment_shader_str_gles2 = "precision mediump float; \n" "varying vec2 v_texCoord; \n" "uniform sampler2D s_texture; \n" "void main() \n" "{ \n" " gl_FragColor = texture2D( s_texture, v_texCoord );\n" "} \n"; /* *INDENT-ON* */ #endif static GstStaticPadTemplate gst_glimage_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ( #if GST_GL_HAVE_PLATFORM_EGL GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_MEMORY_EGL_IMAGE, "RGBA") "; " #endif 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 { ARG_0, ARG_DISPLAY, PROP_CLIENT_RESHAPE_CALLBACK, PROP_CLIENT_DRAW_CALLBACK, PROP_CLIENT_DATA, PROP_FORCE_ASPECT_RATIO, PROP_PIXEL_ASPECT_RATIO, PROP_OTHER_CONTEXT }; #define gst_glimage_sink_parent_class parent_class G_DEFINE_TYPE_WITH_CODE (GstGLImageSink, gst_glimage_sink, GST_TYPE_VIDEO_SINK, G_IMPLEMENT_INTERFACE (GST_TYPE_VIDEO_OVERLAY, gst_glimage_sink_video_overlay_init); GST_DEBUG_CATEGORY_INIT (gst_debug_glimage_sink, "glimagesink", 0, "OpenGL Video Sink")); static void gst_glimage_sink_class_init (GstGLImageSinkClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; GstBaseSinkClass *gstbasesink_class; GstElementClass *element_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gstbasesink_class = (GstBaseSinkClass *) klass; element_class = GST_ELEMENT_CLASS (klass); gobject_class->set_property = gst_glimage_sink_set_property; gobject_class->get_property = gst_glimage_sink_get_property; g_object_class_install_property (gobject_class, ARG_DISPLAY, g_param_spec_string ("display", "Display", "Display name", NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_CLIENT_RESHAPE_CALLBACK, g_param_spec_pointer ("client-reshape-callback", "Client reshape callback", "Define a custom reshape callback in a client code", G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_CLIENT_DRAW_CALLBACK, g_param_spec_pointer ("client-draw-callback", "Client draw callback", "Define a custom draw callback in a client code", G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_CLIENT_DATA, g_param_spec_pointer ("client-data", "Client data", "Pass data to the draw and reshape callbacks", G_PARAM_WRITABLE | 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", FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PIXEL_ASPECT_RATIO, gst_param_spec_fraction ("pixel-aspect-ratio", "Pixel Aspect Ratio", "The pixel aspect ratio of the device", 0, 1, G_MAXINT, 1, 0, 1, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gst_element_class_set_metadata (element_class, "OpenGL video sink", "Sink/Video", "A videosink based on OpenGL", "Julien Isorce "); g_object_class_install_property (gobject_class, PROP_OTHER_CONTEXT, g_param_spec_object ("other-context", "External OpenGL context", "Give an external OpenGL context with which to share textures", GST_GL_TYPE_CONTEXT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_glimage_sink_template)); gobject_class->finalize = gst_glimage_sink_finalize; gstelement_class->change_state = gst_glimage_sink_change_state; gstelement_class->set_context = gst_glimage_sink_set_context; gstbasesink_class->query = GST_DEBUG_FUNCPTR (gst_glimage_sink_query); gstbasesink_class->set_caps = gst_glimage_sink_set_caps; gstbasesink_class->get_times = gst_glimage_sink_get_times; gstbasesink_class->preroll = gst_glimage_sink_render; gstbasesink_class->render = gst_glimage_sink_render; gstbasesink_class->prepare = gst_glimage_sink_prepare; gstbasesink_class->propose_allocation = gst_glimage_sink_propose_allocation; gstbasesink_class->stop = gst_glimage_sink_stop; } static void gst_glimage_sink_init (GstGLImageSink * glimage_sink) { glimage_sink->display_name = NULL; glimage_sink->window_id = 0; glimage_sink->new_window_id = 0; glimage_sink->display = NULL; glimage_sink->clientReshapeCallback = NULL; glimage_sink->clientDrawCallback = NULL; glimage_sink->client_data = NULL; glimage_sink->keep_aspect_ratio = FALSE; glimage_sink->par_n = 0; glimage_sink->par_d = 1; glimage_sink->pool = NULL; glimage_sink->redisplay_texture = 0; g_mutex_init (&glimage_sink->drawing_lock); } static void gst_glimage_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstGLImageSink *glimage_sink; g_return_if_fail (GST_IS_GLIMAGE_SINK (object)); glimage_sink = GST_GLIMAGE_SINK (object); switch (prop_id) { case ARG_DISPLAY: { g_free (glimage_sink->display_name); glimage_sink->display_name = g_strdup (g_value_get_string (value)); break; } case PROP_CLIENT_RESHAPE_CALLBACK: { glimage_sink->clientReshapeCallback = g_value_get_pointer (value); break; } case PROP_CLIENT_DRAW_CALLBACK: { glimage_sink->clientDrawCallback = g_value_get_pointer (value); break; } case PROP_CLIENT_DATA: { glimage_sink->client_data = g_value_get_pointer (value); break; } case PROP_FORCE_ASPECT_RATIO: { glimage_sink->keep_aspect_ratio = g_value_get_boolean (value); break; } case PROP_PIXEL_ASPECT_RATIO: { glimage_sink->par_n = gst_value_get_fraction_numerator (value); glimage_sink->par_d = gst_value_get_fraction_denominator (value); break; } case PROP_OTHER_CONTEXT: { if (glimage_sink->other_context) gst_object_unref (glimage_sink->other_context); glimage_sink->other_context = g_value_dup_object (value); break; } default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_glimage_sink_finalize (GObject * object) { GstGLImageSink *glimage_sink; g_return_if_fail (GST_IS_GLIMAGE_SINK (object)); glimage_sink = GST_GLIMAGE_SINK (object); g_mutex_clear (&glimage_sink->drawing_lock); g_free (glimage_sink->display_name); GST_DEBUG ("finalized"); } static void gst_glimage_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstGLImageSink *glimage_sink; g_return_if_fail (GST_IS_GLIMAGE_SINK (object)); glimage_sink = GST_GLIMAGE_SINK (object); switch (prop_id) { case ARG_DISPLAY: g_value_set_string (value, glimage_sink->display_name); break; case PROP_FORCE_ASPECT_RATIO: g_value_set_boolean (value, glimage_sink->keep_aspect_ratio); break; case PROP_PIXEL_ASPECT_RATIO: gst_value_set_fraction (value, glimage_sink->par_n, glimage_sink->par_d); break; case PROP_OTHER_CONTEXT: g_value_set_object (value, glimage_sink->other_context); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static gboolean _ensure_gl_setup (GstGLImageSink * gl_sink) { GError *error = NULL; if (!gst_gl_ensure_display (gl_sink, &gl_sink->display)) return FALSE; if (!gl_sink->context) { GstGLWindow *window; gl_sink->context = gst_gl_context_new (gl_sink->display); window = gst_gl_context_get_window (gl_sink->context); if (!gl_sink->window_id && !gl_sink->new_window_id) gst_video_overlay_prepare_window_handle (GST_VIDEO_OVERLAY (gl_sink)); if (gl_sink->window_id != gl_sink->new_window_id) { gl_sink->window_id = gl_sink->new_window_id; gst_gl_window_set_window_handle (window, gl_sink->window_id); } if (!gst_gl_context_create (gl_sink->context, gl_sink->other_context, &error)) goto context_error; /* setup callbacks */ gst_gl_window_set_resize_callback (window, GST_GL_WINDOW_RESIZE_CB (gst_glimage_sink_on_resize), gst_object_ref (gl_sink), (GDestroyNotify) gst_object_unref); gst_gl_window_set_draw_callback (window, GST_GL_WINDOW_CB (gst_glimage_sink_on_draw), gst_object_ref (gl_sink), (GDestroyNotify) gst_object_unref); gst_gl_window_set_close_callback (window, GST_GL_WINDOW_CB (gst_glimage_sink_on_close), gst_object_ref (gl_sink), (GDestroyNotify) gst_object_unref); gst_object_unref (window); } if (!gl_sink->upload) { gl_sink->upload = gst_gl_upload_new (gl_sink->context); if (!gst_gl_upload_init_format (gl_sink->upload, &gl_sink->info)) goto upload_error; } return TRUE; upload_error: { GST_ELEMENT_ERROR (gl_sink, RESOURCE, NOT_FOUND, ("Failed to init upload"), (NULL)); return FALSE; } context_error: { GST_ELEMENT_ERROR (gl_sink, RESOURCE, NOT_FOUND, ("%s", error->message), (NULL)); return FALSE; } } static gboolean gst_glimage_sink_query (GstBaseSink * bsink, GstQuery * query) { GstGLImageSink *glimage_sink = GST_GLIMAGE_SINK (bsink); gboolean res = FALSE; switch (GST_QUERY_TYPE (query)) { case GST_QUERY_CONTEXT: { return gst_gl_handle_context_query ((GstElement *) glimage_sink, query, &glimage_sink->display); break; } default: res = GST_BASE_SINK_CLASS (parent_class)->query (bsink, query); break; } return res; } static void gst_glimage_sink_cleanup_glthread (GstGLImageSink * gl_sink) { #if GST_GL_HAVE_GLES2 if (gl_sink->redisplay_shader) { gst_object_unref (gl_sink->redisplay_shader); gl_sink->redisplay_shader = NULL; } #endif } /* * GstElement methods */ static gboolean gst_glimage_sink_stop (GstBaseSink * bsink) { GstGLImageSink *glimage_sink = GST_GLIMAGE_SINK (bsink); if (glimage_sink->pool) { gst_object_unref (glimage_sink->pool); glimage_sink->pool = NULL; } return TRUE; } static void gst_glimage_sink_set_context (GstElement * element, GstContext * context) { GstGLImageSink *gl_sink = GST_GLIMAGE_SINK (element); gst_gl_handle_set_context (element, context, &gl_sink->display); } static GstStateChangeReturn gst_glimage_sink_change_state (GstElement * element, GstStateChange transition) { GstGLImageSink *glimage_sink; GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; GST_DEBUG ("change state"); glimage_sink = GST_GLIMAGE_SINK (element); switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: break; case GST_STATE_CHANGE_READY_TO_PAUSED: g_atomic_int_set (&glimage_sink->to_quit, 0); if (!glimage_sink->display) { if (!gst_gl_ensure_display (glimage_sink, &glimage_sink->display)) return GST_STATE_CHANGE_FAILURE; } 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_GLIMAGE_SINK_LOCK (glimage_sink); glimage_sink->redisplay_texture = 0; GST_GLIMAGE_SINK_UNLOCK (glimage_sink); if (glimage_sink->upload) { gst_object_unref (glimage_sink->upload); glimage_sink->upload = NULL; } glimage_sink->window_id = 0; //but do not reset glimage_sink->new_window_id if (glimage_sink->pool) { gst_buffer_pool_set_active (glimage_sink->pool, FALSE); gst_object_unref (glimage_sink->pool); glimage_sink->pool = NULL; } GST_VIDEO_SINK_WIDTH (glimage_sink) = 1; GST_VIDEO_SINK_HEIGHT (glimage_sink) = 1; if (glimage_sink->context) { GstGLWindow *window = gst_gl_context_get_window (glimage_sink->context); gst_gl_window_send_message (window, GST_GL_WINDOW_CB (gst_glimage_sink_cleanup_glthread), glimage_sink); gst_gl_window_set_resize_callback (window, NULL, NULL, NULL); gst_gl_window_set_draw_callback (window, NULL, NULL, NULL); gst_gl_window_set_close_callback (window, NULL, NULL, NULL); gst_object_unref (window); gst_object_unref (glimage_sink->context); glimage_sink->context = NULL; gst_object_unref (glimage_sink->display); glimage_sink->display = NULL; } break; } case GST_STATE_CHANGE_READY_TO_NULL: break; default: break; } return ret; } static void gst_glimage_sink_get_times (GstBaseSink * bsink, GstBuffer * buf, GstClockTime * start, GstClockTime * end) { GstGLImageSink *glimagesink; glimagesink = GST_GLIMAGE_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 (&glimagesink->info) > 0) { *end = *start + gst_util_uint64_scale_int (GST_SECOND, GST_VIDEO_INFO_FPS_D (&glimagesink->info), GST_VIDEO_INFO_FPS_N (&glimagesink->info)); } } } } static gboolean gst_glimage_sink_set_caps (GstBaseSink * bsink, GstCaps * caps) { GstGLImageSink *glimage_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; GST_DEBUG ("set caps with %" GST_PTR_FORMAT, caps); glimage_sink = GST_GLIMAGE_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); if (glimage_sink->tex_id) gst_gl_context_del_texture (glimage_sink->context, &glimage_sink->tex_id); par_n = GST_VIDEO_INFO_PAR_N (&vinfo); par_d = GST_VIDEO_INFO_PAR_D (&vinfo); if (!par_n) par_n = 1; /* get display's PAR */ if (glimage_sink->par_n != 0 && glimage_sink->par_d != 0) { display_par_n = glimage_sink->par_n; display_par_d = glimage_sink->par_d; } else { 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 (glimage_sink) = (guint) gst_util_uint64_scale_int (height, display_ratio_num, display_ratio_den); GST_VIDEO_SINK_HEIGHT (glimage_sink) = height; } else if (width % display_ratio_num == 0) { GST_DEBUG ("keeping video width"); GST_VIDEO_SINK_WIDTH (glimage_sink) = width; GST_VIDEO_SINK_HEIGHT (glimage_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 (glimage_sink) = (guint) gst_util_uint64_scale_int (height, display_ratio_num, display_ratio_den); GST_VIDEO_SINK_HEIGHT (glimage_sink) = height; } GST_DEBUG ("scaling to %dx%d", GST_VIDEO_SINK_WIDTH (glimage_sink), GST_VIDEO_SINK_HEIGHT (glimage_sink)); glimage_sink->info = vinfo; if (!_ensure_gl_setup (glimage_sink)) return FALSE; //FIXME: this texture seems to be never deleted when going to STATE_NULL gst_gl_context_gen_texture (glimage_sink->context, &glimage_sink->tex_id, GST_VIDEO_INFO_FORMAT (&glimage_sink->info), width, height); newpool = gst_gl_buffer_pool_new (glimage_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 = glimage_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 */ glimage_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); } return TRUE; } static GstFlowReturn gst_glimage_sink_prepare (GstBaseSink * bsink, GstBuffer * buf) { GstGLImageSink *glimage_sink; glimage_sink = GST_GLIMAGE_SINK (bsink); GST_TRACE ("preparing buffer:%p", buf); if (GST_VIDEO_SINK_WIDTH (glimage_sink) < 1 || GST_VIDEO_SINK_HEIGHT (glimage_sink) < 1) { return GST_FLOW_NOT_NEGOTIATED; } if (!_ensure_gl_setup (glimage_sink)) return GST_FLOW_NOT_NEGOTIATED; if (!gst_gl_upload_perform_with_buffer (glimage_sink->upload, buf, &glimage_sink->next_tex)) goto upload_failed; if (glimage_sink->window_id != glimage_sink->new_window_id) { GstGLWindow *window = gst_gl_context_get_window (glimage_sink->context); glimage_sink->window_id = glimage_sink->new_window_id; gst_gl_window_set_window_handle (window, glimage_sink->window_id); gst_object_unref (window); } return GST_FLOW_OK; upload_failed: { GST_ELEMENT_ERROR (glimage_sink, RESOURCE, NOT_FOUND, ("%s", "Failed to upload buffer"), (NULL)); return GST_FLOW_ERROR; } } static GstFlowReturn gst_glimage_sink_render (GstBaseSink * bsink, GstBuffer * buf) { GstGLImageSink *glimage_sink; GST_TRACE ("rendering buffer:%p", buf); glimage_sink = GST_GLIMAGE_SINK (bsink); GST_TRACE ("redisplay texture:%u of size:%ux%u, window size:%ux%u", glimage_sink->next_tex, GST_VIDEO_INFO_WIDTH (&glimage_sink->info), GST_VIDEO_INFO_HEIGHT (&glimage_sink->info), GST_VIDEO_SINK_WIDTH (glimage_sink), GST_VIDEO_SINK_HEIGHT (glimage_sink)); /* Avoid to release the texture while drawing */ GST_GLIMAGE_SINK_LOCK (glimage_sink); glimage_sink->redisplay_texture = glimage_sink->next_tex; GST_GLIMAGE_SINK_UNLOCK (glimage_sink); /* Ask the underlying window to redraw its content */ if (!gst_glimage_sink_redisplay (glimage_sink)) goto redisplay_failed; GST_TRACE ("post redisplay"); if (g_atomic_int_get (&glimage_sink->to_quit) != 0) { GST_ELEMENT_ERROR (glimage_sink, RESOURCE, NOT_FOUND, ("%s", gst_gl_context_get_error ()), (NULL)); gst_gl_upload_release_buffer (glimage_sink->upload); return GST_FLOW_ERROR; } gst_gl_upload_release_buffer (glimage_sink->upload); return GST_FLOW_OK; /* ERRORS */ redisplay_failed: { gst_gl_upload_release_buffer (glimage_sink->upload); GST_ELEMENT_ERROR (glimage_sink, RESOURCE, NOT_FOUND, ("%s", gst_gl_context_get_error ()), (NULL)); return GST_FLOW_ERROR; } } static void gst_glimage_sink_video_overlay_init (GstVideoOverlayInterface * iface) { iface->set_window_handle = gst_glimage_sink_set_window_handle; iface->expose = gst_glimage_sink_expose; } static void gst_glimage_sink_set_window_handle (GstVideoOverlay * overlay, guintptr id) { GstGLImageSink *glimage_sink = GST_GLIMAGE_SINK (overlay); guintptr window_id = (guintptr) id; g_return_if_fail (GST_IS_GLIMAGE_SINK (overlay)); GST_DEBUG ("set_xwindow_id %" G_GUINT64_FORMAT, (guint64) window_id); glimage_sink->new_window_id = window_id; } static void gst_glimage_sink_expose (GstVideoOverlay * overlay) { GstGLImageSink *glimage_sink = GST_GLIMAGE_SINK (overlay); /* redisplay opengl scene */ if (glimage_sink->display && glimage_sink->window_id) { if (glimage_sink->window_id != glimage_sink->new_window_id) { GstGLWindow *window = gst_gl_context_get_window (glimage_sink->context); glimage_sink->window_id = glimage_sink->new_window_id; gst_gl_window_set_window_handle (window, glimage_sink->window_id); gst_object_unref (window); } gst_glimage_sink_redisplay (glimage_sink); } } static gboolean gst_glimage_sink_propose_allocation (GstBaseSink * bsink, GstQuery * query) { GstGLImageSink *glimage_sink = GST_GLIMAGE_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 (glimage_sink)) return FALSE; gst_query_parse_allocation (query, &caps, &need_pool); if (caps == NULL) goto no_caps; if ((pool = glimage_sink->pool)) gst_object_ref (pool); if (pool != NULL) { GstCaps *pcaps; /* we had a pool, check caps */ GST_DEBUG_OBJECT (glimage_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 (glimage_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 (glimage_sink, "create new pool"); pool = gst_gl_buffer_pool_new (glimage_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); gl_apis = gst_gl_api_to_string (gst_gl_context_get_gl_api (glimage_sink->context)); platform = gst_gl_platform_to_string (gst_gl_context_get_gl_platform (glimage_sink->context)); handle = (gpointer) gst_gl_context_get_gl_context (glimage_sink->context); gl_context = gst_structure_new ("GstVideoGLTextureUploadMeta", "gst.gl.GstGLContext", GST_GL_TYPE_CONTEXT, glimage_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); #if GST_GL_HAVE_PLATFORM_EGL allocator = gst_allocator_find (GST_EGL_IMAGE_MEMORY_TYPE); gst_query_add_allocation_param (query, allocator, ¶ms); gst_object_unref (allocator); #endif 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; } } #if GST_GL_HAVE_GLES2 /* Called in the gl thread */ static void gst_glimage_sink_thread_init_redisplay (GstGLImageSink * gl_sink) { GError *error = NULL; gl_sink->redisplay_shader = gst_gl_shader_new (gl_sink->context); gst_gl_shader_set_vertex_source (gl_sink->redisplay_shader, redisplay_vertex_shader_str_gles2); gst_gl_shader_set_fragment_source (gl_sink->redisplay_shader, redisplay_fragment_shader_str_gles2); gst_gl_shader_compile (gl_sink->redisplay_shader, &error); if (error) { gst_gl_context_set_error (gl_sink->context, "%s", error->message); g_error_free (error); error = NULL; gst_gl_context_clear_shader (gl_sink->context); } else { gl_sink->redisplay_attr_position_loc = gst_gl_shader_get_attribute_location (gl_sink->redisplay_shader, "a_position"); gl_sink->redisplay_attr_texture_loc = gst_gl_shader_get_attribute_location (gl_sink->redisplay_shader, "a_texCoord"); } } #endif static void gst_glimage_sink_on_resize (const GstGLImageSink * gl_sink, gint width, gint height) { /* Here gl_sink members (ex:gl_sink->info) have a life time of set_caps. * It means that they cannot not change between two set_caps */ const GstGLFuncs *gl = gl_sink->context->gl_vtable; GST_TRACE ("GL Window resized to %ux%u", width, height); /* check if a client reshape callback is registered */ if (gl_sink->clientReshapeCallback) gl_sink->clientReshapeCallback (width, height, gl_sink->client_data); /* default reshape */ else { if (gl_sink->keep_aspect_ratio) { GstVideoRectangle src, dst, result; src.x = 0; src.y = 0; src.w = GST_VIDEO_INFO_WIDTH (&gl_sink->info); src.h = GST_VIDEO_INFO_HEIGHT (&gl_sink->info); 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); } #if GST_GL_HAVE_OPENGL if (USING_OPENGL (gl_sink->context)) { gl->MatrixMode (GL_PROJECTION); gl->LoadIdentity (); gluOrtho2D (0, width, 0, height); gl->MatrixMode (GL_MODELVIEW); } #endif } } static void gst_glimage_sink_on_draw (const GstGLImageSink * gl_sink) { /* Here gl_sink members (ex:gl_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; GstGLWindow *window = NULL; g_return_if_fail (GST_IS_GLIMAGE_SINK (gl_sink)); gl = gl_sink->context->gl_vtable; GST_GLIMAGE_SINK_LOCK (gl_sink); /* check if texture is ready for being drawn */ if (!gl_sink->redisplay_texture) { GST_GLIMAGE_SINK_UNLOCK (gl_sink); return; } window = gst_gl_context_get_window (gl_sink->context); window->is_drawing = TRUE; /* opengl scene */ GST_TRACE ("redrawing texture:%u", gl_sink->redisplay_texture); /* make sure that the environnement is clean */ gst_gl_context_clear_shader (gl_sink->context); #if GST_GL_HAVE_OPENGL if (USING_OPENGL (gl_sink->context)) gl->Disable (GL_TEXTURE_2D); #endif gl->BindTexture (GL_TEXTURE_2D, 0); /* check if a client draw callback is registered */ if (gl_sink->clientDrawCallback) { gboolean doRedisplay = gl_sink->clientDrawCallback (gl_sink->redisplay_texture, GST_VIDEO_INFO_WIDTH (&gl_sink->info), GST_VIDEO_INFO_HEIGHT (&gl_sink->info), gl_sink->client_data); if (doRedisplay) gst_gl_window_draw_unlocked (window, GST_VIDEO_INFO_WIDTH (&gl_sink->info), GST_VIDEO_INFO_HEIGHT (&gl_sink->info)); } /* default opengl scene */ else { #if GST_GL_HAVE_OPENGL if (USING_OPENGL (gl_sink->context)) { GLfloat verts[8] = { 1.0f, 1.0f, -1.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f }; GLfloat texcoords[8] = { 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f }; gl->Clear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); gl->MatrixMode (GL_PROJECTION); gl->LoadIdentity (); gl->Enable (GL_TEXTURE_2D); gl->BindTexture (GL_TEXTURE_2D, gl_sink->redisplay_texture); gl->EnableClientState (GL_VERTEX_ARRAY); gl->EnableClientState (GL_TEXTURE_COORD_ARRAY); gl->VertexPointer (2, GL_FLOAT, 0, &verts); gl->TexCoordPointer (2, GL_FLOAT, 0, &texcoords); gl->DrawArrays (GL_TRIANGLE_FAN, 0, 4); gl->DisableClientState (GL_VERTEX_ARRAY); gl->DisableClientState (GL_TEXTURE_COORD_ARRAY); gl->Disable (GL_TEXTURE_2D); } #endif #if GST_GL_HAVE_GLES2 if (USING_GLES2 (gl_sink->context)) { const GLfloat vVertices[] = { 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 }; GLushort indices[] = { 0, 1, 2, 0, 2, 3 }; gl->Clear (GL_COLOR_BUFFER_BIT); gst_gl_shader_use (gl_sink->redisplay_shader); /* Load the vertex position */ gl->VertexAttribPointer (gl_sink->redisplay_attr_position_loc, 3, GL_FLOAT, GL_FALSE, 5 * sizeof (GLfloat), vVertices); /* Load the texture coordinate */ gl->VertexAttribPointer (gl_sink->redisplay_attr_texture_loc, 2, GL_FLOAT, GL_FALSE, 5 * sizeof (GLfloat), &vVertices[3]); gl->EnableVertexAttribArray (gl_sink->redisplay_attr_position_loc); gl->EnableVertexAttribArray (gl_sink->redisplay_attr_texture_loc); gl->ActiveTexture (GL_TEXTURE0); gl->BindTexture (GL_TEXTURE_2D, gl_sink->redisplay_texture); gst_gl_shader_set_uniform_1i (gl_sink->redisplay_shader, "s_texture", 0); gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices); } #endif } /* end default opengl scene */ window->is_drawing = FALSE; gst_object_unref (window); GST_GLIMAGE_SINK_UNLOCK (gl_sink); } static void gst_glimage_sink_on_close (GstGLImageSink * gl_sink) { gst_gl_context_set_error (gl_sink->context, "Output window was closed"); g_atomic_int_set (&gl_sink->to_quit, 1); } static gboolean gst_glimage_sink_redisplay (GstGLImageSink * gl_sink) { GstGLWindow *window; gboolean alive; window = gst_gl_context_get_window (gl_sink->context); if (window && gst_gl_window_is_running (window)) { #if GST_GL_HAVE_GLES2 if (USING_GLES2 (gl_sink->context)) { if (!gl_sink->redisplay_shader) { gst_gl_window_send_message (window, GST_GL_WINDOW_CB (gst_glimage_sink_thread_init_redisplay), gl_sink); } } #endif /* Drawing is asynchrone: gst_gl_window_draw is not blocking * It means that it does not wait for stuff being executed in other threads */ gst_gl_window_draw (window, GST_VIDEO_SINK_WIDTH (gl_sink), GST_VIDEO_SINK_HEIGHT (gl_sink)); } alive = gst_gl_window_is_running (window); gst_object_unref (window); return alive; }