/* * GStreamer * Copyright (C) 2009 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-glvideomixer * @title: glvideomixer * * Composites a number of streams into a single output scene using OpenGL in * a similar fashion to compositor and videomixer. See the compositor plugin * for documentation about the #GstGLVideoMixerPad properties. * * ## Examples * |[ * gst-launch-1.0 glvideomixer name=m ! glimagesink \ * videotestsrc ! video/x-raw, format=YUY2 ! glupload ! glcolorconvert ! m. \ * videotestsrc pattern=12 ! video/x-raw, format=I420, framerate=5/1, width=100, height=200 ! queue ! \ * glupload ! glcolorconvert ! m. \ * videotestsrc ! glupload ! gleffects effect=2 ! queue ! m. \ * videotestsrc ! glupload ! glfiltercube ! queue ! m. \ * videotestsrc ! glupload ! gleffects effect=6 ! queue ! m. * ]| * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include "gstglvideomixer.h" #include "gstglmixerbin.h" #include "gstglutils.h" #define GST_CAT_DEFAULT gst_gl_video_mixer_debug GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT); static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%u", GST_PAD_SINK, GST_PAD_REQUEST, GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_MEMORY_GL_MEMORY, "RGBA")) ); #define GST_TYPE_GL_VIDEO_MIXER_BACKGROUND (gst_gl_video_mixer_background_get_type()) static GType gst_gl_video_mixer_background_get_type (void) { static GType mixer_background_type = 0; static const GEnumValue mixer_background[] = { {GST_GL_VIDEO_MIXER_BACKGROUND_CHECKER, "Checker pattern", "checker"}, {GST_GL_VIDEO_MIXER_BACKGROUND_BLACK, "Black", "black"}, {GST_GL_VIDEO_MIXER_BACKGROUND_WHITE, "White", "white"}, {GST_GL_VIDEO_MIXER_BACKGROUND_TRANSPARENT, "Transparent Background to enable further compositing", "transparent"}, {0, NULL, NULL}, }; if (!mixer_background_type) { mixer_background_type = g_enum_register_static ("GstGLVideoMixerBackground", mixer_background); } return mixer_background_type; } #define GST_TYPE_GL_VIDEO_MIXER_BLEND_EQUATION (gst_gl_video_mixer_blend_equation_get_type()) static GType gst_gl_video_mixer_blend_equation_get_type (void) { static GType mixer_blend_equation_type = 0; static const GEnumValue mixer_blend_equations[] = { {GST_GL_VIDEO_MIXER_BLEND_EQUATION_ADD, "Add", "add"}, {GST_GL_VIDEO_MIXER_BLEND_EQUATION_SUBTRACT, "Subtract", "subtract"}, {GST_GL_VIDEO_MIXER_BLEND_EQUATION_REVERSE_SUBTRACT, "Reverse Subtract", "reverse-subtract"}, {0, NULL, NULL}, }; if (!mixer_blend_equation_type) { mixer_blend_equation_type = g_enum_register_static ("GstGLVideoMixerBlendEquation", mixer_blend_equations); } return mixer_blend_equation_type; } #define GST_TYPE_GL_VIDEO_MIXER_BLEND_FUNCTION (gst_gl_video_mixer_blend_function_get_type()) static GType gst_gl_video_mixer_blend_function_get_type (void) { static GType mixer_blend_function_type = 0; static const GEnumValue mixer_blend_funcs[] = { {GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ZERO, "Zero", "zero"}, {GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ONE, "One", "one"}, {GST_GL_VIDEO_MIXER_BLEND_FUNCTION_SRC_COLOR, "Source Color", "src-color"}, {GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ONE_MINUS_SRC_COLOR, "One Minus Source Color", "one-minus-src-color"}, {GST_GL_VIDEO_MIXER_BLEND_FUNCTION_DST_COLOR, "Destination Color", "dst-color"}, {GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ONE_MINUS_DST_COLOR, "One Minus Destination Color", "one-minus-dst-color"}, {GST_GL_VIDEO_MIXER_BLEND_FUNCTION_SRC_ALPHA, "Source Alpha", "src-alpha"}, {GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ONE_MINUS_SRC_ALPHA, "One Minus Source Alpha", "one-minus-src-alpha"}, {GST_GL_VIDEO_MIXER_BLEND_FUNCTION_DST_ALPHA, "Destination Alpha", "dst-alpha"}, {GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ONE_MINUS_DST_ALPHA, "One Minus Destination Alpha", "one-minus-dst-alpha"}, {GST_GL_VIDEO_MIXER_BLEND_FUNCTION_CONSTANT_COLOR, "Constant Color", "constant-color"}, {GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ONE_MINUS_CONSTANT_COLOR, "One Minus Constant Color", "one-minus-contant-color"}, {GST_GL_VIDEO_MIXER_BLEND_FUNCTION_CONSTANT_ALPHA, "Constant Alpha", "constant-alpha"}, {GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ONE_MINUS_CONSTANT_ALPHA, "One Minus Constant Alpha", "one-minus-contant-alpha"}, {GST_GL_VIDEO_MIXER_BLEND_FUNCTION_SRC_ALPHA_SATURATE, "Source Alpha Saturate", "src-alpha-saturate"}, {0, NULL, NULL}, }; if (!mixer_blend_function_type) { mixer_blend_function_type = g_enum_register_static ("GstGLVideoMixerBlendFunction", mixer_blend_funcs); } return mixer_blend_function_type; } #define DEFAULT_PAD_XPOS 0 #define DEFAULT_PAD_YPOS 0 #define DEFAULT_PAD_WIDTH 0 #define DEFAULT_PAD_HEIGHT 0 #define DEFAULT_PAD_ALPHA 1.0 #define DEFAULT_PAD_ZORDER 0 #define DEFAULT_PAD_REPEAT_AFTER_EOS FALSE #define DEFAULT_PAD_BLEND_EQUATION_RGB GST_GL_VIDEO_MIXER_BLEND_EQUATION_ADD #define DEFAULT_PAD_BLEND_EQUATION_ALPHA GST_GL_VIDEO_MIXER_BLEND_EQUATION_ADD #define DEFAULT_PAD_BLEND_FUNCTION_SRC_RGB GST_GL_VIDEO_MIXER_BLEND_FUNCTION_SRC_ALPHA #define DEFAULT_PAD_BLEND_FUNCTION_SRC_ALPHA GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ONE #define DEFAULT_PAD_BLEND_FUNCTION_DST_RGB GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ONE_MINUS_SRC_ALPHA #define DEFAULT_PAD_BLEND_FUNCTION_DST_ALPHA GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ONE_MINUS_SRC_ALPHA enum { PROP_INPUT_0, PROP_INPUT_XPOS, PROP_INPUT_YPOS, PROP_INPUT_WIDTH, PROP_INPUT_HEIGHT, PROP_INPUT_ALPHA, PROP_INPUT_BLEND_EQUATION_RGB, PROP_INPUT_BLEND_EQUATION_ALPHA, PROP_INPUT_BLEND_FUNCTION_SRC_RGB, PROP_INPUT_BLEND_FUNCTION_SRC_ALPHA, PROP_INPUT_BLEND_FUNCTION_DST_RGB, PROP_INPUT_BLEND_FUNCTION_DST_ALPHA, PROP_INPUT_BLEND_FUNCTION_CONSTANT_COLOR_RED, PROP_INPUT_BLEND_FUNCTION_CONSTANT_COLOR_GREEN, PROP_INPUT_BLEND_FUNCTION_CONSTANT_COLOR_BLUE, PROP_INPUT_BLEND_FUNCTION_CONSTANT_COLOR_ALPHA, PROP_INPUT_ZORDER, PROP_INPUT_REPEAT_AFTER_EOS, }; static void gst_gl_video_mixer_input_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_gl_video_mixer_input_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); typedef struct _GstGLVideoMixerInput GstGLVideoMixerInput; typedef GstGhostPadClass GstGLVideoMixerInputClass; struct _GstGLVideoMixerInput { GstGhostPad parent; GstSegment segment; GstPad *mixer_pad; }; GType gst_gl_video_mixer_input_get_type (void); G_DEFINE_TYPE (GstGLVideoMixerInput, gst_gl_video_mixer_input, GST_TYPE_GHOST_PAD); static void gst_gl_video_mixer_input_init (GstGLVideoMixerInput * self) { } static void gst_gl_video_mixer_input_class_init (GstGLVideoMixerInputClass * klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); gobject_class->set_property = gst_gl_video_mixer_input_set_property; gobject_class->get_property = gst_gl_video_mixer_input_get_property; g_object_class_install_property (gobject_class, PROP_INPUT_ZORDER, g_param_spec_uint ("zorder", "Z-Order", "Z Order of the picture", 0, 10000, DEFAULT_PAD_ZORDER, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_REPEAT_AFTER_EOS, g_param_spec_boolean ("repeat-after-eos", "Repeat After EOS", "Aggregate the last " "frame on pads that are EOS till they are released", DEFAULT_PAD_REPEAT_AFTER_EOS, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_XPOS, g_param_spec_int ("xpos", "X Position", "X Position of the picture", G_MININT, G_MAXINT, DEFAULT_PAD_XPOS, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_YPOS, g_param_spec_int ("ypos", "Y Position", "Y Position of the picture", G_MININT, G_MAXINT, DEFAULT_PAD_YPOS, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_WIDTH, g_param_spec_int ("width", "Width", "Width of the picture", G_MININT, G_MAXINT, DEFAULT_PAD_WIDTH, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_HEIGHT, g_param_spec_int ("height", "Height", "Height of the picture", G_MININT, G_MAXINT, DEFAULT_PAD_HEIGHT, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_ALPHA, g_param_spec_double ("alpha", "Alpha", "Alpha of the picture", 0.0, 1.0, DEFAULT_PAD_ALPHA, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_BLEND_EQUATION_RGB, g_param_spec_enum ("blend-equation-rgb", "Blend Equation RGB", "Blend Equation for RGB", GST_TYPE_GL_VIDEO_MIXER_BLEND_EQUATION, DEFAULT_PAD_BLEND_EQUATION_RGB, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_BLEND_EQUATION_ALPHA, g_param_spec_enum ("blend-equation-alpha", "Blend Equation Alpha", "Blend Equation for Alpha", GST_TYPE_GL_VIDEO_MIXER_BLEND_EQUATION, DEFAULT_PAD_BLEND_EQUATION_ALPHA, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_BLEND_FUNCTION_SRC_RGB, g_param_spec_enum ("blend-function-src-rgb", "Blend Function Source RGB", "Blend Function for Source RGB", GST_TYPE_GL_VIDEO_MIXER_BLEND_FUNCTION, DEFAULT_PAD_BLEND_FUNCTION_SRC_RGB, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_BLEND_FUNCTION_SRC_ALPHA, g_param_spec_enum ("blend-function-src-alpha", "Blend Function Source Alpha", "Blend Function for Source Alpha", GST_TYPE_GL_VIDEO_MIXER_BLEND_FUNCTION, DEFAULT_PAD_BLEND_FUNCTION_SRC_ALPHA, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_BLEND_FUNCTION_DST_RGB, g_param_spec_enum ("blend-function-dst-rgb", "Blend Function Destination RGB", "Blend Function for Destination RGB", GST_TYPE_GL_VIDEO_MIXER_BLEND_FUNCTION, DEFAULT_PAD_BLEND_FUNCTION_DST_RGB, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_BLEND_FUNCTION_DST_ALPHA, g_param_spec_enum ("blend-function-dst-alpha", "Blend Function Destination Alpha", "Blend Function for Destination Alpha", GST_TYPE_GL_VIDEO_MIXER_BLEND_FUNCTION, DEFAULT_PAD_BLEND_FUNCTION_DST_ALPHA, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_BLEND_FUNCTION_CONSTANT_COLOR_RED, g_param_spec_double ("blend-constant-color-red", "Blend Constant Color Red", "Blend Constant Color Red", 0.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_BLEND_FUNCTION_CONSTANT_COLOR_GREEN, g_param_spec_double ("blend-constant-color-green", "Blend Constant Color Green", "Blend Constant Color Green", 0.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_BLEND_FUNCTION_CONSTANT_COLOR_BLUE, g_param_spec_double ("blend-constant-color-blue", "Blend Constant Color Green", "Blend Constant Color Green", 0.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_BLEND_FUNCTION_CONSTANT_COLOR_ALPHA, g_param_spec_double ("blend-constant-color-alpha", "Blend Constant Color Alpha", "Blend Constant Color Alpha", 0.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); } static void gst_gl_video_mixer_input_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstGLVideoMixerInput *self = (GstGLVideoMixerInput *) object; if (self->mixer_pad) g_object_get_property (G_OBJECT (self->mixer_pad), pspec->name, value); } static void gst_gl_video_mixer_input_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstGLVideoMixerInput *self = (GstGLVideoMixerInput *) object; if (self->mixer_pad) g_object_set_property (G_OBJECT (self->mixer_pad), pspec->name, value); } static GstGhostPad * _create_video_mixer_input (GstGLMixerBin * self, GstPad * mixer_pad) { GstGLVideoMixerInput *input = g_object_new (gst_gl_video_mixer_input_get_type (), "name", GST_OBJECT_NAME (mixer_pad), "direction", GST_PAD_DIRECTION (mixer_pad), NULL); if (!gst_ghost_pad_construct (GST_GHOST_PAD (input))) { gst_object_unref (input); return NULL; } #define ADD_BINDING(obj,ref,prop) \ gst_object_add_control_binding (GST_OBJECT (obj), \ gst_proxy_control_binding_new (GST_OBJECT (obj), prop, \ GST_OBJECT (ref), prop)); ADD_BINDING (mixer_pad, input, "zorder"); ADD_BINDING (mixer_pad, input, "xpos"); ADD_BINDING (mixer_pad, input, "ypos"); ADD_BINDING (mixer_pad, input, "width"); ADD_BINDING (mixer_pad, input, "height"); ADD_BINDING (mixer_pad, input, "alpha"); ADD_BINDING (mixer_pad, input, "blend-equation-rgb"); ADD_BINDING (mixer_pad, input, "blend-equation-alpha"); ADD_BINDING (mixer_pad, input, "blend-function-src-rgb"); ADD_BINDING (mixer_pad, input, "blend-function-src-alpha"); ADD_BINDING (mixer_pad, input, "blend-function-dst-rgb"); ADD_BINDING (mixer_pad, input, "blend-function-dst-alpha"); ADD_BINDING (mixer_pad, input, "blend-constant-color-red"); ADD_BINDING (mixer_pad, input, "blend-constant-color-green"); ADD_BINDING (mixer_pad, input, "blend-constant-color-blue"); ADD_BINDING (mixer_pad, input, "blend-constant-color-alpha"); #undef ADD_BINDING input->mixer_pad = mixer_pad; return GST_GHOST_PAD (input); } enum { PROP_BIN_0, PROP_BIN_BACKGROUND, }; #define DEFAULT_BACKGROUND GST_GL_VIDEO_MIXER_BACKGROUND_CHECKER static void gst_gl_video_mixer_bin_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_gl_video_mixer_bin_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); typedef GstGLMixerBin GstGLVideoMixerBin; typedef GstGLMixerBinClass GstGLVideoMixerBinClass; G_DEFINE_TYPE (GstGLVideoMixerBin, gst_gl_video_mixer_bin, GST_TYPE_GL_MIXER_BIN); static void gst_gl_video_mixer_bin_init (GstGLVideoMixerBin * self) { GstGLMixerBin *mix_bin = GST_GL_MIXER_BIN (self); gst_gl_mixer_bin_finish_init_with_element (mix_bin, g_object_new (GST_TYPE_GL_VIDEO_MIXER, NULL)); } static void gst_gl_video_mixer_bin_class_init (GstGLVideoMixerBinClass * klass) { GstGLMixerBinClass *mixer_class = GST_GL_MIXER_BIN_CLASS (klass); GstElementClass *element_class = GST_ELEMENT_CLASS (klass); GObjectClass *gobject_class = G_OBJECT_CLASS (klass); mixer_class->create_input_pad = _create_video_mixer_input; gobject_class->set_property = gst_gl_video_mixer_bin_set_property; gobject_class->get_property = gst_gl_video_mixer_bin_get_property; g_object_class_install_property (gobject_class, PROP_BIN_BACKGROUND, g_param_spec_enum ("background", "Background", "Background type", GST_TYPE_GL_VIDEO_MIXER_BACKGROUND, DEFAULT_BACKGROUND, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gst_element_class_set_metadata (element_class, "OpenGL video_mixer bin", "Bin/Filter/Effect/Video/Compositor", "OpenGL video_mixer bin", "Matthew Waters "); } static void gst_gl_video_mixer_bin_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstGLMixerBin *self = GST_GL_MIXER_BIN (object); if (self->mixer) g_object_get_property (G_OBJECT (self->mixer), pspec->name, value); } static void gst_gl_video_mixer_bin_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstGLMixerBin *self = GST_GL_MIXER_BIN (object); if (self->mixer) g_object_set_property (G_OBJECT (self->mixer), pspec->name, value); } enum { PROP_0, PROP_BACKGROUND, }; static void gst_gl_video_mixer_child_proxy_init (gpointer g_iface, gpointer iface_data); #define DEBUG_INIT \ GST_DEBUG_CATEGORY_INIT (gst_gl_video_mixer_debug, "glvideomixer", 0, "glvideomixer element"); #define gst_gl_video_mixer_parent_class parent_class G_DEFINE_TYPE_WITH_CODE (GstGLVideoMixer, gst_gl_video_mixer, GST_TYPE_GL_MIXER, G_IMPLEMENT_INTERFACE (GST_TYPE_CHILD_PROXY, gst_gl_video_mixer_child_proxy_init); DEBUG_INIT); static void gst_gl_video_mixer_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_gl_video_mixer_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static GstCaps *_update_caps (GstVideoAggregator * vagg, GstCaps * caps); static GstCaps *_fixate_caps (GstAggregator * agg, GstCaps * caps); static gboolean gst_gl_video_mixer_propose_allocation (GstAggregator * agg, GstAggregatorPad * agg_pad, GstQuery * decide_query, GstQuery * query); static gboolean gst_gl_video_mixer_gl_start (GstGLBaseMixer * base_mix); static void gst_gl_video_mixer_gl_stop (GstGLBaseMixer * base_mix); static gboolean gst_gl_video_mixer_set_caps (GstGLMixer * mixer, GstCaps * outcaps); static gboolean gst_gl_video_mixer_process_textures (GstGLMixer * mixer, GstGLMemory * out_tex); static gboolean gst_gl_video_mixer_callback (gpointer stuff); /* *INDENT-OFF* */ /* fragment source */ static const gchar *video_mixer_f_src = "uniform sampler2D texture; \n" "uniform float alpha;\n" "varying vec2 v_texcoord; \n" "void main() \n" "{ \n" " vec4 rgba = texture2D(texture, v_texcoord);\n" " gl_FragColor = vec4(rgba.rgb, rgba.a * alpha);\n" "} \n"; /* checker vertex source */ static const gchar *checker_v_src = "attribute vec4 a_position;\n" "void main()\n" "{\n" " gl_Position = a_position;\n" "}\n"; /* checker fragment source */ static const gchar *checker_f_src = "const float blocksize = 8.0;\n" "void main ()\n" "{\n" " vec4 high = vec4(0.667, 0.667, 0.667, 1.0);\n" " vec4 low = vec4(0.333, 0.333, 0.333, 1.0);\n" " if (mod(gl_FragCoord.x, blocksize * 2.0) >= blocksize) {\n" " if (mod(gl_FragCoord.y, blocksize * 2.0) >= blocksize)\n" " gl_FragColor = low;\n" " else\n" " gl_FragColor = high;\n" " } else {\n" " if (mod(gl_FragCoord.y, blocksize * 2.0) < blocksize)\n" " gl_FragColor = low;\n" " else\n" " gl_FragColor = high;\n" " }\n" "}\n"; /* *INDENT-ON* */ #define GST_TYPE_GL_VIDEO_MIXER_PAD (gst_gl_video_mixer_pad_get_type()) #define GST_GL_VIDEO_MIXER_PAD(obj) \ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GL_VIDEO_MIXER_PAD, GstGLVideoMixerPad)) #define GST_GL_VIDEO_MIXER_PAD_CLASS(klass) \ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GL_VIDEO_MIXER_PAD, GstGLVideoMixerPadClass)) #define GST_IS_GL_VIDEO_MIXER_PAD(obj) \ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GL_VIDEO_MIXER_PAD)) #define GST_IS_GL_VIDEO_MIXER_PAD_CLASS(klass) \ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GL_VIDEO_MIXER_PAD)) typedef struct _GstGLVideoMixerPad GstGLVideoMixerPad; typedef struct _GstGLVideoMixerPadClass GstGLVideoMixerPadClass; typedef struct _GstGLVideoMixerCollect GstGLVideoMixerCollect; /** * GstGLVideoMixerPad: * * The opaque #GstGLVideoMixerPad structure. */ struct _GstGLVideoMixerPad { GstGLMixerPad parent; /* properties */ gint xpos, ypos; gint width, height; gdouble alpha; GstGLVideoMixerBlendEquation blend_equation_rgb; GstGLVideoMixerBlendEquation blend_equation_alpha; GstGLVideoMixerBlendFunction blend_function_src_rgb; GstGLVideoMixerBlendFunction blend_function_src_alpha; GstGLVideoMixerBlendFunction blend_function_dst_rgb; GstGLVideoMixerBlendFunction blend_function_dst_alpha; gdouble blend_constant_color_red; gdouble blend_constant_color_green; gdouble blend_constant_color_blue; gdouble blend_constant_color_alpha; gboolean geometry_change; GLuint vertex_buffer; gfloat m_matrix[16]; }; struct _GstGLVideoMixerPadClass { GstGLMixerPadClass parent_class; }; GType gst_gl_video_mixer_pad_get_type (void); G_DEFINE_TYPE (GstGLVideoMixerPad, gst_gl_video_mixer_pad, GST_TYPE_GL_MIXER_PAD); static void gst_gl_video_mixer_pad_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_gl_video_mixer_pad_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); enum { PROP_PAD_0, PROP_PAD_XPOS, PROP_PAD_YPOS, PROP_PAD_WIDTH, PROP_PAD_HEIGHT, PROP_PAD_ALPHA, PROP_PAD_BLEND_EQUATION_RGB, PROP_PAD_BLEND_EQUATION_ALPHA, PROP_PAD_BLEND_FUNCTION_SRC_RGB, PROP_PAD_BLEND_FUNCTION_SRC_ALPHA, PROP_PAD_BLEND_FUNCTION_DST_RGB, PROP_PAD_BLEND_FUNCTION_DST_ALPHA, PROP_PAD_BLEND_FUNCTION_CONSTANT_COLOR_RED, PROP_PAD_BLEND_FUNCTION_CONSTANT_COLOR_GREEN, PROP_PAD_BLEND_FUNCTION_CONSTANT_COLOR_BLUE, PROP_PAD_BLEND_FUNCTION_CONSTANT_COLOR_ALPHA, }; static void gst_gl_video_mixer_pad_init (GstGLVideoMixerPad * pad) { pad->alpha = DEFAULT_PAD_ALPHA; pad->blend_equation_rgb = DEFAULT_PAD_BLEND_EQUATION_RGB; pad->blend_equation_alpha = DEFAULT_PAD_BLEND_EQUATION_ALPHA; pad->blend_function_src_rgb = DEFAULT_PAD_BLEND_FUNCTION_SRC_RGB; pad->blend_function_src_alpha = DEFAULT_PAD_BLEND_FUNCTION_SRC_ALPHA; pad->blend_function_dst_rgb = DEFAULT_PAD_BLEND_FUNCTION_DST_RGB; pad->blend_function_dst_alpha = DEFAULT_PAD_BLEND_FUNCTION_DST_ALPHA; memset (pad->m_matrix, 0, sizeof (gfloat) * 4 * 4); pad->m_matrix[0] = 1.0; pad->m_matrix[5] = 1.0; pad->m_matrix[10] = 1.0; pad->m_matrix[15] = 1.0; } static void gst_gl_video_mixer_pad_class_init (GstGLVideoMixerPadClass * klass) { GObjectClass *gobject_class = (GObjectClass *) klass; gobject_class->set_property = gst_gl_video_mixer_pad_set_property; gobject_class->get_property = gst_gl_video_mixer_pad_get_property; g_object_class_install_property (gobject_class, PROP_PAD_XPOS, g_param_spec_int ("xpos", "X Position", "X Position of the picture", G_MININT, G_MAXINT, DEFAULT_PAD_XPOS, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PAD_YPOS, g_param_spec_int ("ypos", "Y Position", "Y Position of the picture", G_MININT, G_MAXINT, DEFAULT_PAD_YPOS, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PAD_WIDTH, g_param_spec_int ("width", "Width", "Width of the picture", G_MININT, G_MAXINT, DEFAULT_PAD_WIDTH, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PAD_HEIGHT, g_param_spec_int ("height", "Height", "Height of the picture", G_MININT, G_MAXINT, DEFAULT_PAD_HEIGHT, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PAD_ALPHA, g_param_spec_double ("alpha", "Alpha", "Alpha of the picture", 0.0, 1.0, DEFAULT_PAD_ALPHA, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_BLEND_EQUATION_RGB, g_param_spec_enum ("blend-equation-rgb", "Blend Equation RGB", "Blend Equation for RGB", GST_TYPE_GL_VIDEO_MIXER_BLEND_EQUATION, DEFAULT_PAD_BLEND_EQUATION_RGB, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_BLEND_EQUATION_ALPHA, g_param_spec_enum ("blend-equation-alpha", "Blend Equation Alpha", "Blend Equation for Alpha", GST_TYPE_GL_VIDEO_MIXER_BLEND_EQUATION, DEFAULT_PAD_BLEND_EQUATION_ALPHA, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_BLEND_FUNCTION_SRC_RGB, g_param_spec_enum ("blend-function-src-rgb", "Blend Function Source RGB", "Blend Function for Source RGB", GST_TYPE_GL_VIDEO_MIXER_BLEND_FUNCTION, DEFAULT_PAD_BLEND_FUNCTION_SRC_RGB, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_BLEND_FUNCTION_SRC_ALPHA, g_param_spec_enum ("blend-function-src-alpha", "Blend Function Source Alpha", "Blend Function for Source Alpha", GST_TYPE_GL_VIDEO_MIXER_BLEND_FUNCTION, DEFAULT_PAD_BLEND_FUNCTION_SRC_ALPHA, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_BLEND_FUNCTION_DST_RGB, g_param_spec_enum ("blend-function-dst-rgb", "Blend Function Destination RGB", "Blend Function for Destination RGB", GST_TYPE_GL_VIDEO_MIXER_BLEND_FUNCTION, DEFAULT_PAD_BLEND_FUNCTION_DST_RGB, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_INPUT_BLEND_FUNCTION_DST_ALPHA, g_param_spec_enum ("blend-function-dst-alpha", "Blend Function Destination Alpha", "Blend Function for Destination Alpha", GST_TYPE_GL_VIDEO_MIXER_BLEND_FUNCTION, DEFAULT_PAD_BLEND_FUNCTION_DST_ALPHA, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PAD_BLEND_FUNCTION_CONSTANT_COLOR_RED, g_param_spec_double ("blend-constant-color-red", "Blend Constant Color Red", "Blend Constant Color Red", 0.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PAD_BLEND_FUNCTION_CONSTANT_COLOR_GREEN, g_param_spec_double ("blend-constant-color-green", "Blend Constant Color Green", "Blend Constant Color Green", 0.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PAD_BLEND_FUNCTION_CONSTANT_COLOR_BLUE, g_param_spec_double ("blend-constant-color-blue", "Blend Constant Color Green", "Blend Constant Color Green", 0.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PAD_BLEND_FUNCTION_CONSTANT_COLOR_ALPHA, g_param_spec_double ("blend-constant-color-alpha", "Blend Constant Color Alpha", "Blend Constant Color Alpha", 0.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS)); } static void gst_gl_video_mixer_pad_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstGLVideoMixerPad *pad = GST_GL_VIDEO_MIXER_PAD (object); switch (prop_id) { case PROP_PAD_XPOS: g_value_set_int (value, pad->xpos); break; case PROP_PAD_YPOS: g_value_set_int (value, pad->ypos); break; case PROP_PAD_WIDTH: g_value_set_int (value, pad->width); break; case PROP_PAD_HEIGHT: g_value_set_int (value, pad->height); break; case PROP_PAD_ALPHA: g_value_set_double (value, pad->alpha); break; case PROP_PAD_BLEND_EQUATION_RGB: g_value_set_enum (value, pad->blend_equation_rgb); break; case PROP_PAD_BLEND_EQUATION_ALPHA: g_value_set_enum (value, pad->blend_equation_alpha); break; case PROP_PAD_BLEND_FUNCTION_SRC_RGB: g_value_set_enum (value, pad->blend_function_src_rgb); break; case PROP_PAD_BLEND_FUNCTION_SRC_ALPHA: g_value_set_enum (value, pad->blend_function_src_alpha); break; case PROP_PAD_BLEND_FUNCTION_DST_RGB: g_value_set_enum (value, pad->blend_function_dst_rgb); break; case PROP_PAD_BLEND_FUNCTION_DST_ALPHA: g_value_set_enum (value, pad->blend_function_dst_alpha); break; case PROP_PAD_BLEND_FUNCTION_CONSTANT_COLOR_RED: g_value_set_double (value, pad->blend_constant_color_red); break; case PROP_PAD_BLEND_FUNCTION_CONSTANT_COLOR_GREEN: g_value_set_double (value, pad->blend_constant_color_green); break; case PROP_PAD_BLEND_FUNCTION_CONSTANT_COLOR_BLUE: g_value_set_double (value, pad->blend_constant_color_blue); break; case PROP_PAD_BLEND_FUNCTION_CONSTANT_COLOR_ALPHA: g_value_set_double (value, pad->blend_constant_color_alpha); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_gl_video_mixer_pad_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstGLVideoMixerPad *pad = GST_GL_VIDEO_MIXER_PAD (object); GstGLMixer *mix = GST_GL_MIXER (gst_pad_get_parent (GST_PAD (pad))); switch (prop_id) { case PROP_PAD_XPOS: pad->xpos = g_value_get_int (value); pad->geometry_change = TRUE; break; case PROP_PAD_YPOS: pad->ypos = g_value_get_int (value); pad->geometry_change = TRUE; break; case PROP_PAD_WIDTH: pad->width = g_value_get_int (value); pad->geometry_change = TRUE; break; case PROP_PAD_HEIGHT: pad->height = g_value_get_int (value); pad->geometry_change = TRUE; break; case PROP_PAD_ALPHA: pad->alpha = g_value_get_double (value); break; case PROP_PAD_BLEND_EQUATION_RGB: pad->blend_equation_rgb = g_value_get_enum (value); break; case PROP_PAD_BLEND_EQUATION_ALPHA: pad->blend_equation_alpha = g_value_get_enum (value); break; case PROP_PAD_BLEND_FUNCTION_SRC_RGB: pad->blend_function_src_rgb = g_value_get_enum (value); break; case PROP_PAD_BLEND_FUNCTION_SRC_ALPHA: pad->blend_function_src_alpha = g_value_get_enum (value); break; case PROP_PAD_BLEND_FUNCTION_DST_RGB: pad->blend_function_dst_rgb = g_value_get_enum (value); break; case PROP_PAD_BLEND_FUNCTION_DST_ALPHA: pad->blend_function_dst_alpha = g_value_get_enum (value); break; case PROP_PAD_BLEND_FUNCTION_CONSTANT_COLOR_RED: pad->blend_constant_color_red = g_value_get_double (value); break; case PROP_PAD_BLEND_FUNCTION_CONSTANT_COLOR_GREEN: pad->blend_constant_color_green = g_value_get_double (value); break; case PROP_PAD_BLEND_FUNCTION_CONSTANT_COLOR_BLUE: pad->blend_constant_color_blue = g_value_get_double (value); break; case PROP_PAD_BLEND_FUNCTION_CONSTANT_COLOR_ALPHA: pad->blend_constant_color_alpha = g_value_get_double (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } gst_object_unref (mix); } static void _del_buffer (GstGLContext * context, GLuint * pBuffer) { context->gl_vtable->DeleteBuffers (1, pBuffer); } static GstPad * gst_gl_video_mixer_request_new_pad (GstElement * element, GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps) { GstPad *newpad; newpad = (GstPad *) GST_ELEMENT_CLASS (parent_class)->request_new_pad (element, templ, req_name, caps); if (newpad == NULL) goto could_not_create; gst_child_proxy_child_added (GST_CHILD_PROXY (element), G_OBJECT (newpad), GST_OBJECT_NAME (newpad)); return newpad; could_not_create: { GST_DEBUG_OBJECT (element, "could not create/add pad"); return NULL; } } static void gst_gl_video_mixer_release_pad (GstElement * element, GstPad * p) { GstGLVideoMixerPad *pad = GST_GL_VIDEO_MIXER_PAD (p); gst_child_proxy_child_removed (GST_CHILD_PROXY (element), G_OBJECT (pad), GST_OBJECT_NAME (pad)); /* we call the base class first as this will remove the pad from * the aggregator, thus stopping misc callbacks from being called, * one of which (process_textures) will recreate the vertex_buffer * if it is destroyed */ GST_ELEMENT_CLASS (g_type_class_peek_parent (G_OBJECT_GET_CLASS (element))) ->release_pad (element, p); if (pad->vertex_buffer) { GstGLBaseMixer *mix = GST_GL_BASE_MIXER (element); gst_gl_context_thread_add (mix->context, (GstGLContextThreadFunc) _del_buffer, &pad->vertex_buffer); pad->vertex_buffer = 0; } } static void gst_gl_video_mixer_class_init (GstGLVideoMixerClass * klass) { GObjectClass *gobject_class; GstElementClass *element_class; GstAggregatorClass *agg_class = (GstAggregatorClass *) klass; GstVideoAggregatorClass *vagg_class = (GstVideoAggregatorClass *) klass; gobject_class = (GObjectClass *) klass; element_class = GST_ELEMENT_CLASS (klass); element_class->request_new_pad = gst_gl_video_mixer_request_new_pad; element_class->release_pad = gst_gl_video_mixer_release_pad; gobject_class->set_property = gst_gl_video_mixer_set_property; gobject_class->get_property = gst_gl_video_mixer_get_property; gst_element_class_set_metadata (element_class, "OpenGL video_mixer", "Filter/Effect/Video/Compositor", "OpenGL video_mixer", "Matthew Waters "); gst_element_class_add_static_pad_template_with_gtype (element_class, &sink_factory, GST_TYPE_GL_VIDEO_MIXER_PAD); g_object_class_install_property (gobject_class, PROP_BACKGROUND, g_param_spec_enum ("background", "Background", "Background type", GST_TYPE_GL_VIDEO_MIXER_BACKGROUND, DEFAULT_BACKGROUND, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); GST_GL_MIXER_CLASS (klass)->set_caps = gst_gl_video_mixer_set_caps; GST_GL_MIXER_CLASS (klass)->process_textures = gst_gl_video_mixer_process_textures; GST_GL_BASE_MIXER_CLASS (klass)->gl_stop = gst_gl_video_mixer_gl_stop; GST_GL_BASE_MIXER_CLASS (klass)->gl_start = gst_gl_video_mixer_gl_start; vagg_class->update_caps = _update_caps; agg_class->fixate_src_caps = _fixate_caps; agg_class->propose_allocation = gst_gl_video_mixer_propose_allocation; GST_GL_BASE_MIXER_CLASS (klass)->supported_gl_api = GST_GL_API_OPENGL | GST_GL_API_OPENGL3 | GST_GL_API_GLES2; } static void gst_gl_video_mixer_init (GstGLVideoMixer * video_mixer) { video_mixer->background = DEFAULT_BACKGROUND; video_mixer->shader = NULL; } static void gst_gl_video_mixer_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstGLVideoMixer *mixer = GST_GL_VIDEO_MIXER (object); switch (prop_id) { case PROP_BACKGROUND: mixer->background = g_value_get_enum (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_gl_video_mixer_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstGLVideoMixer *mixer = GST_GL_VIDEO_MIXER (object); switch (prop_id) { case PROP_BACKGROUND: g_value_set_enum (value, mixer->background); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static gboolean gst_gl_video_mixer_propose_allocation (GstAggregator * agg, GstAggregatorPad * agg_pad, GstQuery * decide_query, GstQuery * query) { if (!GST_AGGREGATOR_CLASS (parent_class)->propose_allocation (agg, agg_pad, decide_query, query)) return FALSE; gst_query_add_allocation_meta (query, GST_VIDEO_AFFINE_TRANSFORMATION_META_API_TYPE, 0); return TRUE; } static void _mixer_pad_get_output_size (GstGLVideoMixer * mix, GstGLVideoMixerPad * mix_pad, gint out_par_n, gint out_par_d, gint * width, gint * height) { GstVideoAggregatorPad *vagg_pad = GST_VIDEO_AGGREGATOR_PAD (mix_pad); gint pad_width, pad_height; guint dar_n, dar_d; /* FIXME: Anything better we can do here? */ if (!vagg_pad->info.finfo || vagg_pad->info.finfo->format == GST_VIDEO_FORMAT_UNKNOWN) { GST_DEBUG_OBJECT (mix_pad, "Have no caps yet"); *width = 0; *height = 0; return; } pad_width = mix_pad->width <= 0 ? GST_VIDEO_INFO_WIDTH (&vagg_pad->info) : mix_pad->width; pad_height = mix_pad->height <= 0 ? GST_VIDEO_INFO_HEIGHT (&vagg_pad->info) : mix_pad->height; if (!gst_video_calculate_display_ratio (&dar_n, &dar_d, pad_width, pad_height, GST_VIDEO_INFO_PAR_N (&vagg_pad->info), GST_VIDEO_INFO_PAR_D (&vagg_pad->info), out_par_n, out_par_d)) { GST_WARNING_OBJECT (mix_pad, "Cannot calculate display aspect ratio"); *width = *height = 0; return; } GST_LOG_OBJECT (mix_pad, "scaling %ux%u by %u/%u (%u/%u / %u/%u)", pad_width, pad_height, dar_n, dar_d, GST_VIDEO_INFO_PAR_N (&vagg_pad->info), GST_VIDEO_INFO_PAR_D (&vagg_pad->info), out_par_n, out_par_d); if (pad_height % dar_n == 0) { pad_width = gst_util_uint64_scale_int (pad_height, dar_n, dar_d); } else if (pad_width % dar_d == 0) { pad_height = gst_util_uint64_scale_int (pad_width, dar_d, dar_n); } else { pad_width = gst_util_uint64_scale_int (pad_height, dar_n, dar_d); } *width = pad_width; *height = pad_height; } static GstCaps * _update_caps (GstVideoAggregator * vagg, GstCaps * caps) { GstCaps *template_caps, *ret; GList *l; GST_OBJECT_LOCK (vagg); for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) { GstVideoAggregatorPad *vaggpad = l->data; if (!vaggpad->info.finfo) continue; if (GST_VIDEO_INFO_FORMAT (&vaggpad->info) == GST_VIDEO_FORMAT_UNKNOWN) continue; if (GST_VIDEO_INFO_MULTIVIEW_MODE (&vaggpad->info) != GST_VIDEO_MULTIVIEW_MODE_NONE && GST_VIDEO_INFO_MULTIVIEW_MODE (&vaggpad->info) != GST_VIDEO_MULTIVIEW_MODE_MONO) { GST_FIXME_OBJECT (vaggpad, "Multiview support is not implemented yet"); GST_OBJECT_UNLOCK (vagg); return NULL; } } GST_OBJECT_UNLOCK (vagg); template_caps = gst_pad_get_pad_template_caps (GST_AGGREGATOR_SRC_PAD (vagg)); ret = gst_caps_intersect (caps, template_caps); return ret; } static GstCaps * _fixate_caps (GstAggregator * agg, GstCaps * caps) { GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (agg); GstGLVideoMixer *mix = GST_GL_VIDEO_MIXER (vagg); gint best_width = 0, best_height = 0; gint best_fps_n = 0, best_fps_d = 0; gint par_n, par_d; gdouble best_fps = 0.; GstCaps *ret = NULL; GstStructure *s; GList *l; ret = gst_caps_make_writable (caps); /* we need this to calculate how large to make the output frame */ s = gst_caps_get_structure (ret, 0); if (!gst_structure_has_field (s, "pixel-aspect-ratio")) { gst_structure_set (s, "pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1, NULL); } gst_structure_fixate_field_nearest_fraction (s, "pixel-aspect-ratio", 1, 1); gst_structure_get_fraction (s, "pixel-aspect-ratio", &par_n, &par_d); GST_OBJECT_LOCK (vagg); for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) { GstVideoAggregatorPad *vaggpad = l->data; GstGLVideoMixerPad *mixer_pad = GST_GL_VIDEO_MIXER_PAD (vaggpad); gint this_width, this_height; gint width, height; gint fps_n, fps_d; gdouble cur_fps; fps_n = GST_VIDEO_INFO_FPS_N (&vaggpad->info); fps_d = GST_VIDEO_INFO_FPS_D (&vaggpad->info); _mixer_pad_get_output_size (mix, mixer_pad, par_n, par_d, &width, &height); if (width == 0 || height == 0) continue; this_width = width + MAX (mixer_pad->xpos, 0); this_height = height + MAX (mixer_pad->ypos, 0); if (best_width < this_width) best_width = this_width; if (best_height < this_height) best_height = this_height; if (fps_d == 0) cur_fps = 0.0; else gst_util_fraction_to_double (fps_n, fps_d, &cur_fps); if (best_fps < cur_fps) { best_fps = cur_fps; best_fps_n = fps_n; best_fps_d = fps_d; } } GST_OBJECT_UNLOCK (vagg); if (best_fps_n <= 0 || best_fps_d <= 0 || best_fps == 0.0) { best_fps_n = 25; best_fps_d = 1; best_fps = 25.0; } s = gst_caps_get_structure (ret, 0); gst_structure_fixate_field_nearest_int (s, "width", best_width); gst_structure_fixate_field_nearest_int (s, "height", best_height); gst_structure_fixate_field_nearest_fraction (s, "framerate", best_fps_n, best_fps_d); ret = gst_caps_fixate (ret); return ret; } static gboolean _reset_pad_gl (GstElement * agg, GstPad * aggpad, gpointer udata) { const GstGLFuncs *gl = GST_GL_BASE_MIXER (agg)->context->gl_vtable; GstGLVideoMixerPad *pad = GST_GL_VIDEO_MIXER_PAD (aggpad); if (pad->vertex_buffer) { gl->DeleteBuffers (1, &pad->vertex_buffer); pad->vertex_buffer = 0; } return TRUE; } static void _reset_gl (GstGLContext * context, GstGLVideoMixer * video_mixer) { const GstGLFuncs *gl = GST_GL_BASE_MIXER (video_mixer)->context->gl_vtable; if (video_mixer->vao) { gl->DeleteVertexArrays (1, &video_mixer->vao); video_mixer->vao = 0; } if (video_mixer->vbo_indices) { gl->DeleteBuffers (1, &video_mixer->vbo_indices); video_mixer->vbo_indices = 0; } if (video_mixer->checker_vbo) { gl->DeleteBuffers (1, &video_mixer->checker_vbo); video_mixer->checker_vbo = 0; } gst_element_foreach_sink_pad (GST_ELEMENT (video_mixer), _reset_pad_gl, NULL); } static gboolean gst_gl_video_mixer_set_caps (GstGLMixer * mixer, GstCaps * outcaps) { GstGLVideoMixer *video_mixer = GST_GL_VIDEO_MIXER (mixer); /* need reconfigure output geometry */ video_mixer->output_geo_change = TRUE; return TRUE; } static void gst_gl_video_mixer_gl_stop (GstGLBaseMixer * base_mix) { GstGLVideoMixer *video_mixer = GST_GL_VIDEO_MIXER (base_mix); gst_clear_object (&video_mixer->shader); gst_clear_object (&video_mixer->checker); _reset_gl (base_mix->context, video_mixer); GST_GL_BASE_MIXER_CLASS (parent_class)->gl_stop (base_mix); } static gboolean gst_gl_video_mixer_gl_start (GstGLBaseMixer * base_mix) { GstGLVideoMixer *video_mixer = GST_GL_VIDEO_MIXER (base_mix); if (!video_mixer->shader) { gchar *frag_str = g_strdup_printf ("%s%s", gst_gl_shader_string_get_highest_precision (base_mix->context, GST_GLSL_VERSION_NONE, GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY), video_mixer_f_src); gst_gl_context_gen_shader (base_mix->context, gst_gl_shader_string_vertex_mat4_vertex_transform, frag_str, &video_mixer->shader); g_free (frag_str); } return GST_GL_BASE_MIXER_CLASS (parent_class)->gl_start (base_mix); } static void _video_mixer_process_gl (GstGLContext * context, GstGLVideoMixer * video_mixer) { GstGLMixer *mixer = GST_GL_MIXER (video_mixer); gst_gl_framebuffer_draw_to_texture (mixer->fbo, video_mixer->out_tex, gst_gl_video_mixer_callback, video_mixer); } static gboolean gst_gl_video_mixer_process_textures (GstGLMixer * mix, GstGLMemory * out_tex) { GstGLVideoMixer *video_mixer = GST_GL_VIDEO_MIXER (mix); GstGLContext *context = GST_GL_BASE_MIXER (mix)->context; video_mixer->out_tex = out_tex; gst_gl_context_thread_add (context, (GstGLContextThreadFunc) _video_mixer_process_gl, video_mixer); return TRUE; } static const GLushort indices[] = { 0, 1, 2, 0, 2, 3 }; static void _init_vbo_indices (GstGLVideoMixer * mixer) { const GstGLFuncs *gl = GST_GL_BASE_MIXER (mixer)->context->gl_vtable; if (!mixer->vbo_indices) { gl->GenBuffers (1, &mixer->vbo_indices); gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, mixer->vbo_indices); gl->BufferData (GL_ELEMENT_ARRAY_BUFFER, sizeof (indices), indices, GL_STATIC_DRAW); } } static gboolean _draw_checker_background (GstGLVideoMixer * video_mixer) { GstGLMixer *mixer = GST_GL_MIXER (video_mixer); const GstGLFuncs *gl = GST_GL_BASE_MIXER (mixer)->context->gl_vtable; gint attr_position_loc = 0; /* *INDENT-OFF* */ gfloat v_vertices[] = { -1.0,-1.0, 0.0f, 1.0,-1.0, 0.0f, 1.0, 1.0, 0.0f, -1.0, 1.0, 0.0f, }; /* *INDENT-ON* */ if (!video_mixer->checker) { gchar *frag_str; frag_str = g_strdup_printf ("%s%s", gst_gl_shader_string_get_highest_precision (GST_GL_BASE_MIXER (mixer)->context, GST_GLSL_VERSION_NONE, GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY), checker_f_src); if (!gst_gl_context_gen_shader (GST_GL_BASE_MIXER (mixer)->context, checker_v_src, frag_str, &video_mixer->checker)) { g_free (frag_str); return FALSE; } g_free (frag_str); } gst_gl_shader_use (video_mixer->checker); attr_position_loc = gst_gl_shader_get_attribute_location (video_mixer->checker, "a_position"); _init_vbo_indices (video_mixer); if (!video_mixer->checker_vbo) { gl->GenBuffers (1, &video_mixer->checker_vbo); gl->BindBuffer (GL_ARRAY_BUFFER, video_mixer->checker_vbo); gl->BufferData (GL_ARRAY_BUFFER, 4 * 3 * sizeof (GLfloat), v_vertices, GL_STATIC_DRAW); } else { gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, video_mixer->vbo_indices); gl->BindBuffer (GL_ARRAY_BUFFER, video_mixer->checker_vbo); } gl->VertexAttribPointer (attr_position_loc, 3, GL_FLOAT, GL_FALSE, 3 * sizeof (GLfloat), (void *) 0); gl->EnableVertexAttribArray (attr_position_loc); gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, 0); gl->DisableVertexAttribArray (attr_position_loc); gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, 0); gl->BindBuffer (GL_ARRAY_BUFFER, 0); return TRUE; } static gboolean _draw_background (GstGLVideoMixer * video_mixer) { GstGLMixer *mixer = GST_GL_MIXER (video_mixer); const GstGLFuncs *gl = GST_GL_BASE_MIXER (mixer)->context->gl_vtable; switch (video_mixer->background) { case GST_GL_VIDEO_MIXER_BACKGROUND_BLACK: gl->ClearColor (0.0, 0.0, 0.0, 1.0); gl->Clear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); break; case GST_GL_VIDEO_MIXER_BACKGROUND_WHITE: gl->ClearColor (1.0, 1.0, 1.0, 1.0); gl->Clear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); break; case GST_GL_VIDEO_MIXER_BACKGROUND_TRANSPARENT: gl->ClearColor (0.0, 0.0, 0.0, 0.0); gl->Clear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); break; case GST_GL_VIDEO_MIXER_BACKGROUND_CHECKER: return _draw_checker_background (video_mixer); break; default: break; } return TRUE; } static guint _blend_equation_to_gl (GstGLVideoMixerBlendEquation equation) { switch (equation) { case GST_GL_VIDEO_MIXER_BLEND_EQUATION_ADD: return GL_FUNC_ADD; case GST_GL_VIDEO_MIXER_BLEND_EQUATION_SUBTRACT: return GL_FUNC_SUBTRACT; case GST_GL_VIDEO_MIXER_BLEND_EQUATION_REVERSE_SUBTRACT: return GL_FUNC_REVERSE_SUBTRACT; default: g_assert_not_reached (); return 0; } } static guint _blend_function_to_gl (GstGLVideoMixerBlendFunction equation) { switch (equation) { case GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ZERO: return GL_ZERO; case GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ONE: return GL_ONE; case GST_GL_VIDEO_MIXER_BLEND_FUNCTION_SRC_COLOR: return GL_SRC_COLOR; case GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ONE_MINUS_SRC_COLOR: return GL_ONE_MINUS_SRC_COLOR; case GST_GL_VIDEO_MIXER_BLEND_FUNCTION_DST_COLOR: return GL_DST_COLOR; case GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ONE_MINUS_DST_COLOR: return GL_ONE_MINUS_DST_COLOR; case GST_GL_VIDEO_MIXER_BLEND_FUNCTION_SRC_ALPHA: return GL_SRC_ALPHA; case GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ONE_MINUS_SRC_ALPHA: return GL_ONE_MINUS_SRC_ALPHA; case GST_GL_VIDEO_MIXER_BLEND_FUNCTION_DST_ALPHA: return GL_DST_ALPHA; case GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ONE_MINUS_DST_ALPHA: return GL_ONE_MINUS_DST_ALPHA; case GST_GL_VIDEO_MIXER_BLEND_FUNCTION_CONSTANT_COLOR: return GL_CONSTANT_COLOR; case GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ONE_MINUS_CONSTANT_COLOR: return GL_ONE_MINUS_CONSTANT_COLOR; case GST_GL_VIDEO_MIXER_BLEND_FUNCTION_CONSTANT_ALPHA: return GL_CONSTANT_ALPHA; case GST_GL_VIDEO_MIXER_BLEND_FUNCTION_ONE_MINUS_CONSTANT_ALPHA: return GL_ONE_MINUS_CONSTANT_ALPHA; case GST_GL_VIDEO_MIXER_BLEND_FUNCTION_SRC_ALPHA_SATURATE: return GL_SRC_ALPHA_SATURATE; default: g_assert_not_reached (); return 0; } } static gboolean _set_blend_state (GstGLVideoMixer * video_mixer, GstGLVideoMixerPad * mix_pad) { const GstGLFuncs *gl = GST_GL_BASE_MIXER (video_mixer)->context->gl_vtable; gboolean require_separate = FALSE; guint gl_func_src_rgb, gl_func_src_alpha, gl_func_dst_rgb, gl_func_dst_alpha; guint gl_equation_rgb, gl_equation_alpha; require_separate = mix_pad->blend_equation_rgb != mix_pad->blend_equation_alpha || mix_pad->blend_function_src_rgb != mix_pad->blend_function_src_alpha || mix_pad->blend_function_dst_rgb != mix_pad->blend_function_dst_alpha; if (require_separate && (!gl->BlendFuncSeparate || !gl->BlendEquationSeparate)) { GST_ERROR_OBJECT (mix_pad, "separated blend equations/functions requested however " "glBlendFuncSeparate or glBlendEquationSeparate not available"); return FALSE; } if (mix_pad->blend_function_dst_rgb == GST_GL_VIDEO_MIXER_BLEND_FUNCTION_SRC_ALPHA_SATURATE) { GST_ERROR_OBJECT (mix_pad, "Destination RGB blend function cannot be \'SRC_ALPHA_SATURATE\'"); return FALSE; } if (mix_pad->blend_function_dst_alpha == GST_GL_VIDEO_MIXER_BLEND_FUNCTION_SRC_ALPHA_SATURATE) { GST_ERROR_OBJECT (mix_pad, "Destination alpha blend function cannot be \'SRC_ALPHA_SATURATE\'"); return FALSE; } gl_equation_rgb = _blend_equation_to_gl (mix_pad->blend_equation_rgb); gl_equation_alpha = _blend_equation_to_gl (mix_pad->blend_equation_alpha); gl_func_src_rgb = _blend_function_to_gl (mix_pad->blend_function_src_rgb); gl_func_src_alpha = _blend_function_to_gl (mix_pad->blend_function_src_alpha); gl_func_dst_rgb = _blend_function_to_gl (mix_pad->blend_function_dst_rgb); gl_func_dst_alpha = _blend_function_to_gl (mix_pad->blend_function_dst_alpha); if (gl->BlendEquationSeparate) gl->BlendEquationSeparate (gl_equation_rgb, gl_equation_alpha); else gl->BlendEquation (gl_equation_rgb); if (gl->BlendFuncSeparate) gl->BlendFuncSeparate (gl_func_src_rgb, gl_func_dst_rgb, gl_func_src_alpha, gl_func_dst_alpha); else gl->BlendFunc (gl_func_src_rgb, gl_func_dst_rgb); gl->BlendColor (mix_pad->blend_constant_color_red, mix_pad->blend_constant_color_green, mix_pad->blend_constant_color_blue, mix_pad->blend_constant_color_alpha); return TRUE; } /* opengl scene, params: input texture (not the output mixer->texture) */ static gboolean gst_gl_video_mixer_callback (gpointer stuff) { GstGLVideoMixer *video_mixer = GST_GL_VIDEO_MIXER (stuff); GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (stuff); GstGLMixer *mixer = GST_GL_MIXER (video_mixer); GstGLFuncs *gl = GST_GL_BASE_MIXER (mixer)->context->gl_vtable; GLint attr_position_loc = 0; GLint attr_texture_loc = 0; guint out_width, out_height; GList *walk; out_width = GST_VIDEO_INFO_WIDTH (&vagg->info); out_height = GST_VIDEO_INFO_HEIGHT (&vagg->info); gst_gl_context_clear_shader (GST_GL_BASE_MIXER (mixer)->context); gl->BindTexture (GL_TEXTURE_2D, 0); gl->Disable (GL_DEPTH_TEST); gl->Disable (GL_CULL_FACE); if (gl->GenVertexArrays) { if (!video_mixer->vao) gl->GenVertexArrays (1, &video_mixer->vao); gl->BindVertexArray (video_mixer->vao); } if (!_draw_background (video_mixer)) return FALSE; gst_gl_shader_use (video_mixer->shader); attr_position_loc = gst_gl_shader_get_attribute_location (video_mixer->shader, "a_position"); attr_texture_loc = gst_gl_shader_get_attribute_location (video_mixer->shader, "a_texcoord"); gl->Enable (GL_BLEND); GST_OBJECT_LOCK (video_mixer); walk = GST_ELEMENT (video_mixer)->sinkpads; while (walk) { GstGLMixerPad *mix_pad = walk->data; GstGLVideoMixerPad *pad = walk->data; GstVideoAggregatorPad *vagg_pad = walk->data; GstVideoInfo *v_info; guint in_tex; guint in_width, in_height; /* *INDENT-OFF* */ gfloat v_vertices[] = { -1.0,-1.0, 0.0f, 0.0f, 0.0f, 1.0,-1.0, 0.0f, 1.0f, 0.0f, 1.0, 1.0, 0.0f, 1.0f, 1.0f, -1.0, 1.0, 0.0f, 0.0f, 1.0f, }; /* *INDENT-ON* */ v_info = &GST_VIDEO_AGGREGATOR_PAD (pad)->info; in_width = GST_VIDEO_INFO_WIDTH (v_info); in_height = GST_VIDEO_INFO_HEIGHT (v_info); if (!mix_pad->current_texture || in_width <= 0 || in_height <= 0 || pad->alpha == 0.0f) { GST_DEBUG ("skipping texture:%u pad:%p width:%u height:%u alpha:%f", mix_pad->current_texture, pad, in_width, in_height, pad->alpha); walk = g_list_next (walk); continue; } if (!_set_blend_state (video_mixer, pad)) { GST_FIXME_OBJECT (pad, "skipping due to incorrect blend parameters"); walk = g_list_next (walk); continue; } in_tex = mix_pad->current_texture; _init_vbo_indices (video_mixer); if (video_mixer->output_geo_change || pad->geometry_change || !pad->vertex_buffer) { gint pad_width, pad_height; gfloat w, h; _mixer_pad_get_output_size (video_mixer, pad, GST_VIDEO_INFO_PAR_N (&vagg->info), GST_VIDEO_INFO_PAR_D (&vagg->info), &pad_width, &pad_height); w = ((gfloat) pad_width / (gfloat) out_width); h = ((gfloat) pad_height / (gfloat) out_height); pad->m_matrix[0] = w; pad->m_matrix[5] = h; pad->m_matrix[12] = 2. * (gfloat) pad->xpos / (gfloat) out_width - (1. - w); pad->m_matrix[13] = 2. * (gfloat) pad->ypos / (gfloat) out_height - (1. - h); GST_TRACE ("processing texture:%u dimensions:%ux%u, at %f,%f %fx%f with " "alpha:%f", in_tex, in_width, in_height, pad->m_matrix[12], pad->m_matrix[13], pad->m_matrix[0], pad->m_matrix[5], pad->alpha); if (!pad->vertex_buffer) gl->GenBuffers (1, &pad->vertex_buffer); gl->BindBuffer (GL_ARRAY_BUFFER, pad->vertex_buffer); gl->BufferData (GL_ARRAY_BUFFER, 4 * 5 * sizeof (GLfloat), v_vertices, GL_STATIC_DRAW); pad->geometry_change = FALSE; } else { gl->BindBuffer (GL_ARRAY_BUFFER, pad->vertex_buffer); } gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, video_mixer->vbo_indices); gl->ActiveTexture (GL_TEXTURE0); gl->BindTexture (GL_TEXTURE_2D, in_tex); gst_gl_shader_set_uniform_1i (video_mixer->shader, "texture", 0); gst_gl_shader_set_uniform_1f (video_mixer->shader, "alpha", pad->alpha); { GstVideoAffineTransformationMeta *af_meta; gfloat matrix[16]; gfloat af_matrix[16]; GstBuffer *buffer = gst_video_aggregator_pad_get_current_buffer (vagg_pad); af_meta = gst_buffer_get_video_affine_transformation_meta (buffer); gst_gl_get_affine_transformation_meta_as_ndc_ext (af_meta, af_matrix); gst_gl_multiply_matrix4 (af_matrix, pad->m_matrix, matrix); gst_gl_shader_set_uniform_matrix_4fv (video_mixer->shader, "u_transformation", 1, FALSE, matrix); } gl->EnableVertexAttribArray (attr_position_loc); gl->EnableVertexAttribArray (attr_texture_loc); gl->VertexAttribPointer (attr_position_loc, 3, GL_FLOAT, GL_FALSE, 5 * sizeof (GLfloat), (void *) 0); gl->VertexAttribPointer (attr_texture_loc, 2, GL_FLOAT, GL_FALSE, 5 * sizeof (GLfloat), (void *) (3 * sizeof (GLfloat))); gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, 0); walk = g_list_next (walk); } video_mixer->output_geo_change = FALSE; GST_OBJECT_UNLOCK (video_mixer); if (gl->GenVertexArrays) { gl->BindVertexArray (0); } else { gl->DisableVertexAttribArray (attr_position_loc); gl->DisableVertexAttribArray (attr_texture_loc); gl->BindBuffer (GL_ELEMENT_ARRAY_BUFFER, 0); gl->BindBuffer (GL_ARRAY_BUFFER, 0); gl->BindTexture (GL_TEXTURE_2D, 0); } gl->Disable (GL_BLEND); gst_gl_context_clear_shader (GST_GL_BASE_MIXER (mixer)->context); return TRUE; } /* GstChildProxy implementation */ static GObject * gst_gl_video_mixer_child_proxy_get_child_by_index (GstChildProxy * child_proxy, guint index) { GstGLVideoMixer *gl_video_mixer = GST_GL_VIDEO_MIXER (child_proxy); GObject *obj = NULL; GST_OBJECT_LOCK (gl_video_mixer); obj = g_list_nth_data (GST_ELEMENT_CAST (gl_video_mixer)->sinkpads, index); if (obj) gst_object_ref (obj); GST_OBJECT_UNLOCK (gl_video_mixer); return obj; } static guint gst_gl_video_mixer_child_proxy_get_children_count (GstChildProxy * child_proxy) { guint count = 0; GstGLVideoMixer *gl_video_mixer = GST_GL_VIDEO_MIXER (child_proxy); GST_OBJECT_LOCK (gl_video_mixer); count = GST_ELEMENT_CAST (gl_video_mixer)->numsinkpads; GST_OBJECT_UNLOCK (gl_video_mixer); GST_INFO_OBJECT (gl_video_mixer, "Children Count: %d", count); return count; } static void gst_gl_video_mixer_child_proxy_init (gpointer g_iface, gpointer iface_data) { GstChildProxyInterface *iface = g_iface; iface->get_child_by_index = gst_gl_video_mixer_child_proxy_get_child_by_index; iface->get_children_count = gst_gl_video_mixer_child_proxy_get_children_count; }