| /* |
| * GStreamer |
| * Copyright (C) 2007 David Schleef <ds@schleef.org> |
| * Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com> |
| * Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@gmail.com> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include "gstglfilter.h" |
| |
| #if GST_GL_HAVE_PLATFORM_EGL |
| #include "egl/gsteglimagememory.h" |
| #endif |
| |
| #define GST_CAT_DEFAULT gst_gl_filter_debug |
| GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT); |
| |
| |
| static GstStaticPadTemplate gst_gl_filter_src_pad_template = |
| GST_STATIC_PAD_TEMPLATE ("src", |
| GST_PAD_SRC, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES |
| (GST_CAPS_FEATURE_MEMORY_GL_MEMORY, |
| "RGBA") "; " |
| #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)) |
| ); |
| |
| static GstStaticPadTemplate gst_gl_filter_sink_pad_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") "; " |
| #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)) |
| ); |
| |
| /* Properties */ |
| enum |
| { |
| PROP_0, |
| PROP_OTHER_CONTEXT |
| }; |
| |
| #define DEBUG_INIT \ |
| GST_DEBUG_CATEGORY_INIT (gst_gl_filter_debug, "glfilter", 0, "glfilter element"); |
| #define gst_gl_filter_parent_class parent_class |
| G_DEFINE_TYPE_WITH_CODE (GstGLFilter, gst_gl_filter, GST_TYPE_BASE_TRANSFORM, |
| DEBUG_INIT); |
| |
| static void gst_gl_filter_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec); |
| static void gst_gl_filter_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * pspec); |
| |
| static void gst_gl_filter_set_context (GstElement * element, |
| GstContext * context); |
| static gboolean gst_gl_filter_query (GstBaseTransform * trans, |
| GstPadDirection direction, GstQuery * query); |
| static GstCaps *gst_gl_filter_transform_caps (GstBaseTransform * bt, |
| GstPadDirection direction, GstCaps * caps, GstCaps * filter); |
| static GstCaps *gst_gl_filter_fixate_caps (GstBaseTransform * bt, |
| GstPadDirection direction, GstCaps * caps, GstCaps * othercaps); |
| static void gst_gl_filter_reset (GstGLFilter * filter); |
| static gboolean gst_gl_filter_start (GstBaseTransform * bt); |
| static gboolean gst_gl_filter_stop (GstBaseTransform * bt); |
| static gboolean gst_gl_filter_get_unit_size (GstBaseTransform * trans, |
| GstCaps * caps, gsize * size); |
| static GstFlowReturn gst_gl_filter_transform (GstBaseTransform * bt, |
| GstBuffer * inbuf, GstBuffer * outbuf); |
| static gboolean gst_gl_filter_propose_allocation (GstBaseTransform * trans, |
| GstQuery * decide_query, GstQuery * query); |
| static gboolean gst_gl_filter_decide_allocation (GstBaseTransform * trans, |
| GstQuery * query); |
| static gboolean gst_gl_filter_set_caps (GstBaseTransform * bt, GstCaps * incaps, |
| GstCaps * outcaps); |
| |
| /* GstGLContextThreadFunc */ |
| static void gst_gl_filter_start_gl (GstGLContext * context, gpointer data); |
| static void gst_gl_filter_stop_gl (GstGLContext * context, gpointer data); |
| |
| static void |
| gst_gl_filter_class_init (GstGLFilterClass * klass) |
| { |
| GObjectClass *gobject_class; |
| GstElementClass *element_class; |
| |
| gobject_class = (GObjectClass *) klass; |
| element_class = GST_ELEMENT_CLASS (klass); |
| |
| gobject_class->set_property = gst_gl_filter_set_property; |
| gobject_class->get_property = gst_gl_filter_get_property; |
| |
| GST_BASE_TRANSFORM_CLASS (klass)->transform_caps = |
| gst_gl_filter_transform_caps; |
| GST_BASE_TRANSFORM_CLASS (klass)->fixate_caps = gst_gl_filter_fixate_caps; |
| GST_BASE_TRANSFORM_CLASS (klass)->transform = gst_gl_filter_transform; |
| GST_BASE_TRANSFORM_CLASS (klass)->query = gst_gl_filter_query; |
| GST_BASE_TRANSFORM_CLASS (klass)->start = gst_gl_filter_start; |
| GST_BASE_TRANSFORM_CLASS (klass)->stop = gst_gl_filter_stop; |
| GST_BASE_TRANSFORM_CLASS (klass)->set_caps = gst_gl_filter_set_caps; |
| GST_BASE_TRANSFORM_CLASS (klass)->propose_allocation = |
| gst_gl_filter_propose_allocation; |
| GST_BASE_TRANSFORM_CLASS (klass)->decide_allocation = |
| gst_gl_filter_decide_allocation; |
| GST_BASE_TRANSFORM_CLASS (klass)->get_unit_size = gst_gl_filter_get_unit_size; |
| |
| element_class->set_context = gst_gl_filter_set_context; |
| |
| 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_gl_filter_src_pad_template)); |
| gst_element_class_add_pad_template (element_class, |
| gst_static_pad_template_get (&gst_gl_filter_sink_pad_template)); |
| |
| klass->set_caps = NULL; |
| klass->filter = NULL; |
| klass->display_init_cb = NULL; |
| klass->display_reset_cb = NULL; |
| klass->onInitFBO = NULL; |
| klass->onStart = NULL; |
| klass->onStop = NULL; |
| klass->onReset = NULL; |
| klass->filter_texture = NULL; |
| } |
| |
| static void |
| gst_gl_filter_init (GstGLFilter * filter) |
| { |
| gst_gl_filter_reset (filter); |
| } |
| |
| static void |
| gst_gl_filter_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec) |
| { |
| GstGLFilter *filter = GST_GL_FILTER (object); |
| |
| switch (prop_id) { |
| case PROP_OTHER_CONTEXT: |
| { |
| if (filter->other_context) |
| gst_object_unref (filter->other_context); |
| filter->other_context = g_value_dup_object (value); |
| break; |
| } |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| } |
| |
| static void |
| gst_gl_filter_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * pspec) |
| { |
| GstGLFilter *filter = GST_GL_FILTER (object); |
| |
| switch (prop_id) { |
| case PROP_OTHER_CONTEXT: |
| g_value_set_object (value, filter->other_context); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| } |
| |
| static void |
| gst_gl_filter_set_context (GstElement * element, GstContext * context) |
| { |
| GstGLFilter *filter = GST_GL_FILTER (element); |
| |
| gst_gl_handle_set_context (element, context, &filter->display); |
| } |
| |
| static gboolean |
| gst_gl_filter_query (GstBaseTransform * trans, GstPadDirection direction, |
| GstQuery * query) |
| { |
| GstGLFilter *filter; |
| gboolean res; |
| |
| filter = GST_GL_FILTER (trans); |
| |
| switch (GST_QUERY_TYPE (query)) { |
| case GST_QUERY_CONTEXT: |
| { |
| res = gst_gl_handle_context_query ((GstElement *) filter, query, |
| &filter->display); |
| break; |
| } |
| default: |
| res = |
| GST_BASE_TRANSFORM_CLASS (parent_class)->query (trans, direction, |
| query); |
| break; |
| } |
| |
| return res; |
| } |
| |
| static void |
| gst_gl_filter_reset (GstGLFilter * filter) |
| { |
| GstGLFilterClass *filter_class = GST_GL_FILTER_GET_CLASS (filter); |
| |
| if (filter->upload) { |
| gst_object_unref (filter->upload); |
| filter->upload = NULL; |
| } |
| |
| if (filter->download) { |
| gst_object_unref (filter->download); |
| filter->download = NULL; |
| } |
| |
| if (filter->context) { |
| if (filter_class->onReset) |
| filter_class->onReset (filter); |
| |
| if (filter_class->display_reset_cb != NULL) { |
| gst_gl_context_thread_add (filter->context, gst_gl_filter_stop_gl, |
| filter); |
| } |
| //blocking call, delete the FBO |
| if (filter->fbo != 0) { |
| gst_gl_context_del_fbo (filter->context, filter->fbo, |
| filter->depthbuffer); |
| } |
| gst_object_unref (filter->context); |
| filter->context = NULL; |
| } |
| |
| if (filter->display) { |
| gst_object_unref (filter->display); |
| filter->display = NULL; |
| } |
| |
| filter->fbo = 0; |
| filter->depthbuffer = 0; |
| filter->default_shader = NULL; |
| if (filter->other_context) |
| gst_object_unref (filter->other_context); |
| filter->other_context = NULL; |
| |
| if (filter->context) |
| gst_object_unref (filter->context); |
| filter->context = NULL; |
| } |
| |
| static gboolean |
| gst_gl_filter_start (GstBaseTransform * bt) |
| { |
| GstGLFilter *filter = GST_GL_FILTER (bt); |
| GstGLFilterClass *filter_class = GST_GL_FILTER_GET_CLASS (filter); |
| |
| if (!gst_gl_ensure_display (filter, &filter->display)) |
| return FALSE; |
| |
| if (filter_class->onStart) |
| filter_class->onStart (filter); |
| |
| return TRUE; |
| } |
| |
| static gboolean |
| gst_gl_filter_stop (GstBaseTransform * bt) |
| { |
| GstGLFilter *filter = GST_GL_FILTER (bt); |
| GstGLFilterClass *filter_class = GST_GL_FILTER_GET_CLASS (filter); |
| |
| if (filter_class->onStop) |
| filter_class->onStop (filter); |
| |
| gst_gl_filter_reset (filter); |
| |
| return TRUE; |
| } |
| |
| static void |
| gst_gl_filter_start_gl (GstGLContext * context, gpointer data) |
| { |
| GstGLFilter *filter = GST_GL_FILTER (data); |
| GstGLFilterClass *filter_class = GST_GL_FILTER_GET_CLASS (filter); |
| |
| filter_class->display_init_cb (filter); |
| } |
| |
| static void |
| gst_gl_filter_stop_gl (GstGLContext * context, gpointer data) |
| { |
| GstGLFilter *filter = GST_GL_FILTER (data); |
| GstGLFilterClass *filter_class = GST_GL_FILTER_GET_CLASS (filter); |
| |
| filter_class->display_reset_cb (filter); |
| } |
| |
| static GstCaps * |
| gst_gl_filter_fixate_caps (GstBaseTransform * bt, |
| GstPadDirection direction, GstCaps * caps, GstCaps * othercaps) |
| { |
| GstStructure *ins, *outs; |
| const GValue *from_par, *to_par; |
| GValue fpar = { 0, }, tpar = { |
| 0,}; |
| |
| othercaps = gst_caps_truncate (othercaps); |
| othercaps = gst_caps_make_writable (othercaps); |
| |
| GST_DEBUG_OBJECT (bt, "trying to fixate othercaps %" GST_PTR_FORMAT |
| " based on caps %" GST_PTR_FORMAT, othercaps, caps); |
| |
| ins = gst_caps_get_structure (caps, 0); |
| outs = gst_caps_get_structure (othercaps, 0); |
| |
| from_par = gst_structure_get_value (ins, "pixel-aspect-ratio"); |
| to_par = gst_structure_get_value (outs, "pixel-aspect-ratio"); |
| |
| /* If we're fixating from the sinkpad we always set the PAR and |
| * assume that missing PAR on the sinkpad means 1/1 and |
| * missing PAR on the srcpad means undefined |
| */ |
| if (direction == GST_PAD_SINK) { |
| if (!from_par) { |
| g_value_init (&fpar, GST_TYPE_FRACTION); |
| gst_value_set_fraction (&fpar, 1, 1); |
| from_par = &fpar; |
| } |
| if (!to_par) { |
| g_value_init (&tpar, GST_TYPE_FRACTION); |
| gst_value_set_fraction (&tpar, 1, 1); |
| to_par = &tpar; |
| } |
| } else { |
| if (!to_par) { |
| g_value_init (&tpar, GST_TYPE_FRACTION); |
| gst_value_set_fraction (&tpar, 1, 1); |
| to_par = &tpar; |
| |
| gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1, |
| NULL); |
| } |
| if (!from_par) { |
| g_value_init (&fpar, GST_TYPE_FRACTION); |
| gst_value_set_fraction (&fpar, 1, 1); |
| from_par = &fpar; |
| } |
| } |
| |
| /* we have both PAR but they might not be fixated */ |
| { |
| gint from_w, from_h, from_par_n, from_par_d, to_par_n, to_par_d; |
| gint w = 0, h = 0; |
| gint from_dar_n, from_dar_d; |
| gint num, den; |
| |
| /* from_par should be fixed */ |
| g_return_val_if_fail (gst_value_is_fixed (from_par), othercaps); |
| |
| from_par_n = gst_value_get_fraction_numerator (from_par); |
| from_par_d = gst_value_get_fraction_denominator (from_par); |
| |
| gst_structure_get_int (ins, "width", &from_w); |
| gst_structure_get_int (ins, "height", &from_h); |
| |
| gst_structure_get_int (outs, "width", &w); |
| gst_structure_get_int (outs, "height", &h); |
| |
| /* if both width and height are already fixed, we can't do anything |
| * about it anymore */ |
| if (w && h) { |
| gint n = 1, d = 1; |
| |
| GST_DEBUG_OBJECT (bt, "dimensions already set to %dx%d, not fixating", |
| w, h); |
| if (!gst_value_is_fixed (to_par)) { |
| GST_DEBUG_OBJECT (bt, "fixating to_par to %dx%d", n, d); |
| if (gst_structure_has_field (outs, "pixel-aspect-ratio")) |
| gst_structure_fixate_field_nearest_fraction (outs, |
| "pixel-aspect-ratio", 1, 1); |
| else if (n != d) |
| gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, |
| 1, 1, NULL); |
| } |
| goto done; |
| } |
| |
| /* Calculate input DAR */ |
| if (!gst_util_fraction_multiply (from_w, from_h, from_par_n, from_par_d, |
| &from_dar_n, &from_dar_d)) { |
| GST_ELEMENT_ERROR (bt, CORE, NEGOTIATION, (NULL), |
| ("Error calculating the output scaled size - integer overflow")); |
| goto done; |
| } |
| |
| GST_DEBUG_OBJECT (bt, "Input DAR is %d/%d", from_dar_n, from_dar_d); |
| |
| /* If either width or height are fixed there's not much we |
| * can do either except choosing a height or width and PAR |
| * that matches the DAR as good as possible |
| */ |
| if (h) { |
| gint num, den; |
| |
| GST_DEBUG_OBJECT (bt, "height is fixed (%d)", h); |
| |
| if (!gst_value_is_fixed (to_par)) { |
| gst_value_set_fraction (&tpar, 1, 1); |
| } |
| |
| /* PAR is fixed, choose the height that is nearest to the |
| * height with the same DAR */ |
| to_par_n = gst_value_get_fraction_numerator (to_par); |
| to_par_d = gst_value_get_fraction_denominator (to_par); |
| |
| GST_DEBUG_OBJECT (bt, "PAR is fixed %d/%d", to_par_n, to_par_d); |
| |
| if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_d, |
| to_par_n, &num, &den)) { |
| GST_ELEMENT_ERROR (bt, CORE, NEGOTIATION, (NULL), |
| ("Error calculating the output scaled size - integer overflow")); |
| goto done; |
| } |
| |
| w = (guint) gst_util_uint64_scale_int (h, num, den); |
| gst_structure_fixate_field_nearest_int (outs, "width", w); |
| |
| goto done; |
| } else if (w) { |
| gint num, den; |
| |
| GST_DEBUG_OBJECT (bt, "width is fixed (%d)", w); |
| |
| if (!gst_value_is_fixed (to_par)) { |
| gst_value_set_fraction (&tpar, 1, 1); |
| } |
| |
| /* PAR is fixed, choose the height that is nearest to the |
| * height with the same DAR */ |
| to_par_n = gst_value_get_fraction_numerator (to_par); |
| to_par_d = gst_value_get_fraction_denominator (to_par); |
| |
| GST_DEBUG_OBJECT (bt, "PAR is fixed %d/%d", to_par_n, to_par_d); |
| |
| if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_d, |
| to_par_n, &num, &den)) { |
| GST_ELEMENT_ERROR (bt, CORE, NEGOTIATION, (NULL), |
| ("Error calculating the output scaled size - integer overflow")); |
| goto done; |
| } |
| |
| h = (guint) gst_util_uint64_scale_int (w, den, num); |
| gst_structure_fixate_field_nearest_int (outs, "height", h); |
| |
| goto done; |
| } else if (gst_value_is_fixed (to_par)) { |
| GstStructure *tmp; |
| gint set_h, set_w, f_h, f_w; |
| |
| to_par_n = gst_value_get_fraction_numerator (to_par); |
| to_par_d = gst_value_get_fraction_denominator (to_par); |
| |
| /* Calculate scale factor for the PAR change */ |
| if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_n, |
| to_par_d, &num, &den)) { |
| GST_ELEMENT_ERROR (bt, CORE, NEGOTIATION, (NULL), |
| ("Error calculating the output scaled size - integer overflow")); |
| goto done; |
| } |
| |
| /* Try to keep the input height */ |
| tmp = gst_structure_copy (outs); |
| gst_structure_fixate_field_nearest_int (tmp, "height", from_h); |
| gst_structure_get_int (tmp, "height", &set_h); |
| |
| /* This might have failed but try to scale the width |
| * to keep the DAR nonetheless */ |
| w = (guint) gst_util_uint64_scale_int (set_h, num, den); |
| gst_structure_fixate_field_nearest_int (tmp, "width", w); |
| gst_structure_get_int (tmp, "width", &set_w); |
| gst_structure_free (tmp); |
| |
| /* We kept the DAR and the height is nearest to the original height */ |
| if (set_w == w) { |
| gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height", |
| G_TYPE_INT, set_h, NULL); |
| goto done; |
| } |
| |
| f_h = set_h; |
| f_w = set_w; |
| |
| /* If the former failed, try to keep the input width at least */ |
| tmp = gst_structure_copy (outs); |
| gst_structure_fixate_field_nearest_int (tmp, "width", from_w); |
| gst_structure_get_int (tmp, "width", &set_w); |
| |
| /* This might have failed but try to scale the width |
| * to keep the DAR nonetheless */ |
| h = (guint) gst_util_uint64_scale_int (set_w, den, num); |
| gst_structure_fixate_field_nearest_int (tmp, "height", h); |
| gst_structure_get_int (tmp, "height", &set_h); |
| gst_structure_free (tmp); |
| |
| /* We kept the DAR and the width is nearest to the original width */ |
| if (set_h == h) { |
| gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height", |
| G_TYPE_INT, set_h, NULL); |
| goto done; |
| } |
| |
| /* If all this failed, keep the height that was nearest to the orignal |
| * height and the nearest possible width. This changes the DAR but |
| * there's not much else to do here. |
| */ |
| gst_structure_set (outs, "width", G_TYPE_INT, f_w, "height", G_TYPE_INT, |
| f_h, NULL); |
| goto done; |
| } else { |
| GstStructure *tmp; |
| gint set_h, set_w, set_par_n, set_par_d, tmp2; |
| |
| /* width, height and PAR are not fixed */ |
| |
| /* First try to keep the height and width as good as possible |
| * and scale PAR */ |
| tmp = gst_structure_copy (outs); |
| gst_structure_fixate_field_nearest_int (tmp, "height", from_h); |
| gst_structure_get_int (tmp, "height", &set_h); |
| gst_structure_fixate_field_nearest_int (tmp, "width", from_w); |
| gst_structure_get_int (tmp, "width", &set_w); |
| |
| if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_h, set_w, |
| &to_par_n, &to_par_d)) { |
| GST_ELEMENT_ERROR (bt, CORE, NEGOTIATION, (NULL), |
| ("Error calculating the output scaled size - integer overflow")); |
| goto done; |
| } |
| |
| if (!gst_structure_has_field (tmp, "pixel-aspect-ratio")) |
| gst_structure_set_value (tmp, "pixel-aspect-ratio", to_par); |
| gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio", |
| to_par_n, to_par_d); |
| gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n, |
| &set_par_d); |
| gst_structure_free (tmp); |
| |
| if (set_par_n == to_par_n && set_par_d == to_par_d) { |
| gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height", |
| G_TYPE_INT, set_h, NULL); |
| |
| if (gst_structure_has_field (outs, "pixel-aspect-ratio") || |
| set_par_n != set_par_d) |
| gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, |
| set_par_n, set_par_d, NULL); |
| goto done; |
| } |
| |
| /* Otherwise try to scale width to keep the DAR with the set |
| * PAR and height */ |
| if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d, |
| set_par_n, &num, &den)) { |
| GST_ELEMENT_ERROR (bt, CORE, NEGOTIATION, (NULL), |
| ("Error calculating the output scaled size - integer overflow")); |
| goto done; |
| } |
| |
| w = (guint) gst_util_uint64_scale_int (set_h, num, den); |
| tmp = gst_structure_copy (outs); |
| gst_structure_fixate_field_nearest_int (tmp, "width", w); |
| gst_structure_get_int (tmp, "width", &tmp2); |
| gst_structure_free (tmp); |
| |
| if (tmp2 == w) { |
| gst_structure_set (outs, "width", G_TYPE_INT, tmp2, "height", |
| G_TYPE_INT, set_h, NULL); |
| if (gst_structure_has_field (outs, "pixel-aspect-ratio") || |
| set_par_n != set_par_d) |
| gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, |
| set_par_n, set_par_d, NULL); |
| goto done; |
| } |
| |
| /* ... or try the same with the height */ |
| h = (guint) gst_util_uint64_scale_int (set_w, den, num); |
| tmp = gst_structure_copy (outs); |
| gst_structure_fixate_field_nearest_int (tmp, "height", h); |
| gst_structure_get_int (tmp, "height", &tmp2); |
| gst_structure_free (tmp); |
| |
| if (tmp2 == h) { |
| gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height", |
| G_TYPE_INT, tmp2, NULL); |
| if (gst_structure_has_field (outs, "pixel-aspect-ratio") || |
| set_par_n != set_par_d) |
| gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, |
| set_par_n, set_par_d, NULL); |
| goto done; |
| } |
| |
| /* If all fails we can't keep the DAR and take the nearest values |
| * for everything from the first try */ |
| gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height", |
| G_TYPE_INT, set_h, NULL); |
| if (gst_structure_has_field (outs, "pixel-aspect-ratio") || |
| set_par_n != set_par_d) |
| gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, |
| set_par_n, set_par_d, NULL); |
| } |
| } |
| |
| |
| done: |
| othercaps = gst_caps_fixate (othercaps); |
| |
| GST_DEBUG_OBJECT (bt, "fixated othercaps to %" GST_PTR_FORMAT, othercaps); |
| |
| if (from_par == &fpar) |
| g_value_unset (&fpar); |
| if (to_par == &tpar) |
| g_value_unset (&tpar); |
| |
| return othercaps; |
| } |
| |
| |
| static GstCaps * |
| gst_gl_filter_set_caps_features (const GstCaps * caps, |
| const gchar * feature_name) |
| { |
| GstCaps *tmp = gst_caps_copy (caps); |
| guint n = gst_caps_get_size (tmp); |
| guint i = 0; |
| |
| for (i = 0; i < n; i++) { |
| GstCapsFeatures *features = gst_caps_get_features (tmp, i); |
| if (features) { |
| guint n_f = gst_caps_features_get_size (features); |
| guint j = 0; |
| for (j = 0; j < n_f; j++) { |
| gst_caps_features_remove_id (features, |
| gst_caps_features_get_nth_id (features, j)); |
| } |
| } |
| |
| gst_caps_features_add (features, feature_name); |
| gst_caps_set_simple (tmp, "format", G_TYPE_STRING, "RGBA", NULL); |
| } |
| |
| return tmp; |
| } |
| |
| static GstCaps * |
| gst_gl_filter_transform_caps (GstBaseTransform * bt, |
| GstPadDirection direction, GstCaps * caps, GstCaps * filter) |
| { |
| GstCaps *tmp = NULL; |
| GstCaps *result = NULL; |
| |
| if (direction == GST_PAD_SINK) { |
| GstCaps *glcaps = gst_gl_filter_set_caps_features (caps, |
| GST_CAPS_FEATURE_MEMORY_GL_MEMORY); |
| #if GST_GL_HAVE_PLATFORM_EGL |
| GstCaps *eglcaps = gst_gl_filter_set_caps_features (caps, |
| GST_CAPS_FEATURE_MEMORY_EGL_IMAGE); |
| #endif |
| GstCaps *uploadcaps = gst_gl_filter_set_caps_features (caps, |
| GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META); |
| |
| tmp = gst_caps_new_empty (); |
| |
| tmp = gst_caps_merge (tmp, glcaps); |
| #if GST_GL_HAVE_PLATFORM_EGL |
| tmp = gst_caps_merge (tmp, eglcaps); |
| #endif |
| tmp = gst_caps_merge (tmp, uploadcaps); |
| tmp = gst_caps_merge (tmp, gst_caps_copy (caps)); |
| } else { |
| tmp = gst_caps_copy (caps); |
| } |
| |
| if (filter) { |
| result = gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST); |
| gst_caps_unref (tmp); |
| } else { |
| result = tmp; |
| } |
| |
| GST_DEBUG_OBJECT (bt, "returning caps: %" GST_PTR_FORMAT, result); |
| |
| return result; |
| } |
| |
| |
| static gboolean |
| gst_gl_filter_get_unit_size (GstBaseTransform * trans, GstCaps * caps, |
| gsize * size) |
| { |
| gboolean ret = FALSE; |
| GstVideoInfo info; |
| |
| ret = gst_video_info_from_caps (&info, caps); |
| if (ret) |
| *size = GST_VIDEO_INFO_SIZE (&info); |
| |
| return TRUE; |
| } |
| |
| static gboolean |
| gst_gl_filter_set_caps (GstBaseTransform * bt, GstCaps * incaps, |
| GstCaps * outcaps) |
| { |
| GstGLFilter *filter; |
| GstGLFilterClass *filter_class; |
| |
| filter = GST_GL_FILTER (bt); |
| filter_class = GST_GL_FILTER_GET_CLASS (filter); |
| |
| if (!gst_video_info_from_caps (&filter->in_info, incaps)) |
| goto wrong_caps; |
| if (!gst_video_info_from_caps (&filter->out_info, outcaps)) |
| goto wrong_caps; |
| |
| if (filter_class->set_caps) { |
| if (!filter_class->set_caps (filter, incaps, outcaps)) |
| goto error; |
| } |
| |
| GST_DEBUG ("set_caps %dx%d", GST_VIDEO_INFO_WIDTH (&filter->out_info), |
| GST_VIDEO_INFO_HEIGHT (&filter->out_info)); |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| wrong_caps: |
| { |
| GST_WARNING ("Wrong caps"); |
| return FALSE; |
| } |
| error: |
| { |
| return FALSE; |
| } |
| } |
| |
| static gboolean |
| gst_gl_filter_propose_allocation (GstBaseTransform * trans, |
| GstQuery * decide_query, GstQuery * query) |
| { |
| GstGLFilter *filter = GST_GL_FILTER (trans); |
| GstBufferPool *pool; |
| GstStructure *config; |
| GstCaps *caps, *decide_caps; |
| guint size; |
| gboolean need_pool; |
| GError *error = NULL; |
| GstStructure *gl_context; |
| gchar *platform, *gl_apis; |
| gpointer handle; |
| GstAllocator *allocator = NULL; |
| GstAllocationParams params; |
| |
| gst_query_parse_allocation (query, &caps, &need_pool); |
| |
| if (caps == NULL) |
| goto no_caps; |
| |
| if ((pool = filter->pool)) |
| gst_object_ref (pool); |
| |
| if (pool != NULL) { |
| GstCaps *pcaps; |
| |
| /* we had a pool, check caps */ |
| GST_DEBUG_OBJECT (filter, "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 (filter, "pool has different caps"); |
| /* different caps, we can't use this pool */ |
| gst_object_unref (pool); |
| pool = NULL; |
| } |
| gst_structure_free (config); |
| } |
| |
| if (!gst_gl_ensure_display (filter, &filter->display)) |
| return FALSE; |
| |
| if (!filter->context) { |
| filter->context = gst_gl_context_new (filter->display); |
| if (!gst_gl_context_create (filter->context, filter->other_context, &error)) |
| goto context_error; |
| } |
| |
| if (pool == NULL && need_pool) { |
| GstVideoInfo info; |
| GstBufferPool *decide_pool; |
| |
| if (!gst_video_info_from_caps (&info, caps)) |
| goto invalid_caps; |
| |
| gst_query_parse_allocation (decide_query, &decide_caps, NULL); |
| decide_pool = gst_base_transform_get_buffer_pool (trans); |
| if (GST_IS_GL_BUFFER_POOL (decide_pool) |
| && gst_caps_is_equal_fixed (decide_caps, caps)) { |
| pool = decide_pool; |
| } else { |
| GST_DEBUG_OBJECT (filter, "create new pool"); |
| gst_object_unref (decide_pool); |
| pool = gst_gl_buffer_pool_new (filter->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, 1, 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 (filter->context)); |
| platform = |
| gst_gl_platform_to_string (gst_gl_context_get_gl_platform |
| (filter->context)); |
| handle = (gpointer) gst_gl_context_get_gl_context (filter->context); |
| |
| gl_context = |
| gst_structure_new ("GstVideoGLTextureUploadMeta", "gst.gl.GstGLContext", |
| GST_GL_TYPE_CONTEXT, filter->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 |
| if (gst_gl_context_check_feature (filter->context, "EGL_KHR_image_base")) { |
| 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 (trans, "no caps specified"); |
| return FALSE; |
| } |
| invalid_caps: |
| { |
| GST_DEBUG_OBJECT (trans, "invalid caps specified"); |
| return FALSE; |
| } |
| config_failed: |
| { |
| GST_DEBUG_OBJECT (trans, "failed setting config"); |
| return FALSE; |
| } |
| context_error: |
| { |
| GST_ELEMENT_ERROR (trans, RESOURCE, NOT_FOUND, ("%s", error->message), |
| (NULL)); |
| return FALSE; |
| } |
| } |
| |
| static gboolean |
| gst_gl_filter_decide_allocation (GstBaseTransform * trans, GstQuery * query) |
| { |
| GstGLFilter *filter = GST_GL_FILTER (trans); |
| GstGLFilterClass *filter_class = GST_GL_FILTER_GET_CLASS (filter); |
| GstBufferPool *pool = NULL; |
| GstStructure *config; |
| GstCaps *caps; |
| guint min, max, size; |
| gboolean update_pool; |
| guint idx; |
| GError *error = NULL; |
| guint in_width, in_height, out_width, out_height; |
| GstGLContext *other_context = NULL; |
| |
| gst_query_parse_allocation (query, &caps, NULL); |
| |
| if (gst_query_get_n_allocation_pools (query) > 0) { |
| gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max); |
| |
| update_pool = TRUE; |
| } else { |
| GstVideoInfo vinfo; |
| |
| gst_video_info_init (&vinfo); |
| gst_video_info_from_caps (&vinfo, caps); |
| size = vinfo.size; |
| min = max = 0; |
| update_pool = FALSE; |
| } |
| |
| if (!gst_gl_ensure_display (filter, &filter->display)) |
| return FALSE; |
| |
| if (gst_query_find_allocation_meta (query, |
| GST_VIDEO_GL_TEXTURE_UPLOAD_META_API_TYPE, &idx)) { |
| GstGLContext *context; |
| const GstStructure *upload_meta_params; |
| gpointer handle; |
| gchar *type; |
| gchar *apis; |
| |
| gst_query_parse_nth_allocation_meta (query, idx, &upload_meta_params); |
| if (upload_meta_params) { |
| if (gst_structure_get (upload_meta_params, "gst.gl.GstGLContext", |
| GST_GL_TYPE_CONTEXT, &context, NULL) && context) { |
| GstGLContext *old = filter->context; |
| |
| filter->context = context; |
| if (old) |
| gst_object_unref (old); |
| } else if (gst_structure_get (upload_meta_params, "gst.gl.context.handle", |
| G_TYPE_POINTER, &handle, "gst.gl.context.type", G_TYPE_STRING, |
| &type, "gst.gl.context.apis", G_TYPE_STRING, &apis, NULL) |
| && handle) { |
| GstGLPlatform platform = GST_GL_PLATFORM_NONE; |
| GstGLAPI gl_apis; |
| |
| GST_DEBUG ("got GL context handle 0x%p with type %s and apis %s", |
| handle, type, apis); |
| |
| platform = gst_gl_platform_from_string (type); |
| gl_apis = gst_gl_api_from_string (apis); |
| |
| if (gl_apis && platform) |
| other_context = |
| gst_gl_context_new_wrapped (filter->display, (guintptr) handle, |
| platform, gl_apis); |
| } |
| } |
| } |
| |
| if (filter->other_context) { |
| if (!other_context) { |
| other_context = filter->other_context; |
| } else { |
| GST_ELEMENT_WARNING (filter, LIBRARY, SETTINGS, |
| ("%s", "Cannot share with more than one GL context"), |
| ("%s", "Cannot share with more than one GL context")); |
| } |
| } |
| |
| if (!filter->context) { |
| filter->context = gst_gl_context_new (filter->display); |
| if (!gst_gl_context_create (filter->context, other_context, &error)) |
| goto context_error; |
| } |
| |
| in_width = GST_VIDEO_INFO_WIDTH (&filter->in_info); |
| in_height = GST_VIDEO_INFO_HEIGHT (&filter->in_info); |
| out_width = GST_VIDEO_INFO_WIDTH (&filter->out_info); |
| out_height = GST_VIDEO_INFO_HEIGHT (&filter->out_info); |
| |
| //blocking call, generate a FBO |
| if (!gst_gl_context_gen_fbo (filter->context, out_width, out_height, |
| &filter->fbo, &filter->depthbuffer)) |
| goto context_error; |
| |
| gst_gl_context_gen_texture (filter->context, &filter->in_tex_id, |
| GST_VIDEO_FORMAT_RGBA, in_width, in_height); |
| |
| gst_gl_context_gen_texture (filter->context, &filter->out_tex_id, |
| GST_VIDEO_FORMAT_RGBA, out_width, out_height); |
| |
| if (filter_class->display_init_cb != NULL) { |
| gst_gl_context_thread_add (filter->context, gst_gl_filter_start_gl, filter); |
| } |
| |
| if (filter_class->onInitFBO) { |
| if (!filter_class->onInitFBO (filter)) |
| goto error; |
| } |
| |
| if (!pool) |
| pool = gst_gl_buffer_pool_new (filter->context); |
| |
| config = gst_buffer_pool_get_config (pool); |
| gst_buffer_pool_config_set_params (config, caps, size, min, max); |
| gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META); |
| gst_buffer_pool_set_config (pool, config); |
| |
| if (filter->upload) { |
| gst_object_unref (filter->upload); |
| filter->upload = NULL; |
| } |
| |
| if (update_pool) |
| gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max); |
| else |
| gst_query_add_allocation_pool (query, pool, size, min, max); |
| |
| gst_object_unref (pool); |
| |
| return TRUE; |
| |
| context_error: |
| { |
| GST_ELEMENT_ERROR (trans, RESOURCE, NOT_FOUND, ("%s", error->message), |
| (NULL)); |
| return FALSE; |
| } |
| error: |
| { |
| GST_ELEMENT_ERROR (trans, LIBRARY, INIT, |
| ("Subclass failed to initialize."), (NULL)); |
| return FALSE; |
| } |
| } |
| |
| /** |
| * gst_gl_filter_filter_texture: |
| * @filter: a #GstGLFilter |
| * @inbuf: an input buffer |
| * @outbuf: an output buffer |
| * |
| * Perform automatic upload if needed, call filter_texture vfunc and then an |
| * automatic download if needed. |
| * |
| * Returns: whether the transformation succeeded |
| */ |
| gboolean |
| gst_gl_filter_filter_texture (GstGLFilter * filter, GstBuffer * inbuf, |
| GstBuffer * outbuf) |
| { |
| GstGLFilterClass *filter_class; |
| guint in_tex, out_tex; |
| GstVideoFrame out_frame; |
| gboolean ret, out_gl_mem; |
| GstVideoGLTextureUploadMeta *out_tex_upload_meta; |
| |
| filter_class = GST_GL_FILTER_GET_CLASS (filter); |
| |
| if (!gst_gl_upload_perform_with_buffer (filter->upload, inbuf, &in_tex)) |
| return FALSE; |
| |
| if (!gst_video_frame_map (&out_frame, &filter->out_info, outbuf, |
| GST_MAP_WRITE | GST_MAP_GL)) { |
| ret = FALSE; |
| goto inbuf_error; |
| } |
| |
| out_gl_mem = gst_is_gl_memory (out_frame.map[0].memory); |
| out_tex_upload_meta = gst_buffer_get_video_gl_texture_upload_meta (outbuf); |
| |
| if (out_gl_mem) { |
| out_tex = *(guint *) out_frame.data[0]; |
| } else { |
| GST_LOG ("Output Buffer does not contain correct memory, " |
| "attempting to wrap for download"); |
| |
| if (!filter->download) |
| filter->download = gst_gl_download_new (filter->context); |
| |
| gst_gl_download_set_format (filter->download, &out_frame.info); |
| out_tex = filter->out_tex_id; |
| } |
| |
| GST_DEBUG ("calling filter_texture with textures in:%i out:%i", in_tex, |
| out_tex); |
| |
| g_assert (filter_class->filter_texture); |
| ret = filter_class->filter_texture (filter, in_tex, out_tex); |
| |
| if (!out_gl_mem && !out_tex_upload_meta) { |
| if (!gst_gl_download_perform_with_data (filter->download, out_tex, |
| out_frame.data)) { |
| GST_ELEMENT_ERROR (filter, RESOURCE, NOT_FOUND, |
| ("%s", "Failed to download video frame"), (NULL)); |
| ret = FALSE; |
| goto error; |
| } |
| } |
| |
| error: |
| gst_video_frame_unmap (&out_frame); |
| inbuf_error: |
| gst_gl_upload_release_buffer (filter->upload); |
| |
| return ret; |
| } |
| |
| static GstFlowReturn |
| gst_gl_filter_transform (GstBaseTransform * bt, GstBuffer * inbuf, |
| GstBuffer * outbuf) |
| { |
| GstGLFilter *filter; |
| GstGLFilterClass *filter_class; |
| GstCaps *in_caps, *out_caps; |
| GstBufferPool *pool; |
| |
| filter = GST_GL_FILTER (bt); |
| filter_class = GST_GL_FILTER_GET_CLASS (bt); |
| |
| if (!gst_gl_ensure_display (filter, &filter->display)) |
| return GST_FLOW_NOT_NEGOTIATED; |
| |
| if (!filter->upload) { |
| in_caps = gst_pad_get_current_caps (GST_BASE_TRANSFORM_SINK_PAD (filter)); |
| out_caps = gst_pad_get_current_caps (GST_BASE_TRANSFORM_SRC_PAD (filter)); |
| pool = gst_base_transform_get_buffer_pool (bt); |
| |
| if (GST_IS_GL_BUFFER_POOL (pool) |
| && gst_caps_is_equal_fixed (in_caps, out_caps)) { |
| filter->upload = gst_object_ref (GST_GL_BUFFER_POOL (pool)->upload); |
| } else { |
| filter->upload = gst_gl_upload_new (filter->context); |
| } |
| gst_gl_upload_set_format (filter->upload, &filter->in_info); |
| |
| gst_caps_unref (in_caps); |
| gst_caps_unref (out_caps); |
| gst_object_unref (pool); |
| } |
| |
| g_assert (filter_class->filter || filter_class->filter_texture); |
| |
| if (filter_class->filter) |
| filter_class->filter (filter, inbuf, outbuf); |
| else if (filter_class->filter_texture) |
| gst_gl_filter_filter_texture (filter, inbuf, outbuf); |
| |
| return GST_FLOW_OK; |
| } |
| |
| /* convenience functions to simplify filter development */ |
| /** |
| * gst_gl_filter_render_to_target: |
| * @filter: a #GstGLFilter |
| * @resize: whether to automatically resize the texture between the input size |
| * and the output size |
| * @input: the input texture |
| * @target: the output texture |
| * @func: the function to transform @input into @output. called with @data |
| * @data: the data associated with @func |
| * |
| * Transforms @input into @output using @func on through FBO. @resize should |
| * only ever be %TRUE whenever @input is the input texture of @filter. |
| */ |
| void |
| gst_gl_filter_render_to_target (GstGLFilter * filter, gboolean resize, |
| GLuint input, GLuint target, GLCB func, gpointer data) |
| { |
| guint in_width, in_height, out_width, out_height; |
| |
| out_width = GST_VIDEO_INFO_WIDTH (&filter->out_info); |
| out_height = GST_VIDEO_INFO_HEIGHT (&filter->out_info); |
| if (resize) { |
| in_width = GST_VIDEO_INFO_WIDTH (&filter->in_info); |
| in_height = GST_VIDEO_INFO_HEIGHT (&filter->in_info); |
| } else { |
| in_width = out_width; |
| in_height = out_height; |
| } |
| |
| GST_LOG ("rendering to target. in %u, %ux%u out %u, %ux%u", input, in_width, |
| in_height, target, out_width, out_height); |
| |
| gst_gl_context_use_fbo (filter->context, |
| out_width, out_height, |
| filter->fbo, filter->depthbuffer, target, |
| func, in_width, in_height, input, 0, |
| in_width, 0, in_height, GST_GL_DISPLAY_PROJECTION_ORTHO2D, data); |
| } |
| |
| static void |
| _draw_with_shader_cb (gint width, gint height, guint texture, gpointer stuff) |
| { |
| GstGLFilter *filter = GST_GL_FILTER (stuff); |
| GstGLFuncs *gl = filter->context->gl_vtable; |
| |
| #if GST_GL_HAVE_OPENGL |
| if (gst_gl_context_get_gl_api (filter->context) & GST_GL_API_OPENGL) { |
| gl->MatrixMode (GL_PROJECTION); |
| gl->LoadIdentity (); |
| } |
| #endif |
| |
| gst_gl_shader_use (filter->default_shader); |
| |
| gl->ActiveTexture (GL_TEXTURE1); |
| gl->BindTexture (GL_TEXTURE_2D, texture); |
| |
| gst_gl_shader_set_uniform_1i (filter->default_shader, "tex", 1); |
| gst_gl_shader_set_uniform_1f (filter->default_shader, "width", width); |
| gst_gl_shader_set_uniform_1f (filter->default_shader, "height", height); |
| |
| gst_gl_filter_draw_texture (filter, texture, width, height); |
| } |
| |
| /** |
| * gst_gl_filter_render_to_target_with_shader: |
| * @filter: a #GstGLFilter |
| * @resize: whether to automatically resize the texture between the input size |
| * and the output size |
| * @input: the input texture |
| * @target: the output texture |
| * @shader: the shader to use. |
| * |
| * Transforms @input into @output using @shader on FBO. @resize should |
| * only ever be %TRUE whenever @input is the input texture of @filter. |
| * |
| * See also: gst_gl_filter_render_to_target() |
| */ |
| /* attach target to a FBO, use shader, pass input as "tex" uniform to |
| * the shader, render input to a quad */ |
| void |
| gst_gl_filter_render_to_target_with_shader (GstGLFilter * filter, |
| gboolean resize, GLuint input, GLuint target, GstGLShader * shader) |
| { |
| filter->default_shader = shader; |
| gst_gl_filter_render_to_target (filter, resize, input, target, |
| _draw_with_shader_cb, filter); |
| } |
| |
| /** |
| * gst_gl_filter_draw_texture: |
| * @filter: a #GstGLFilter |
| * @texture: the texture to draw |
| * @width: width of @texture |
| * @height: height of texture |
| * |
| * Draws @texture into the OpenGL scene at the specified @width and @height. |
| */ |
| void |
| gst_gl_filter_draw_texture (GstGLFilter * filter, GLuint texture, |
| guint width, guint height) |
| { |
| GstGLContext *context = filter->context; |
| GstGLFuncs *gl = context->gl_vtable; |
| |
| GST_DEBUG ("drawing texture:%u dimensions:%ux%u", texture, width, height); |
| |
| #if GST_GL_HAVE_OPENGL |
| if (gst_gl_context_get_gl_api (context) & GST_GL_API_OPENGL) { |
| GLfloat verts[] = { -1.0f, -1.0f, |
| 1.0f, -1.0f, |
| 1.0f, 1.0f, |
| -1.0f, 1.0f |
| }; |
| GLfloat texcoords[] = { 0.0f, 0.0f, |
| 1.0f, 0.0f, |
| 1.0f, 1.0f, |
| 0.0f, 1.0f |
| }; |
| |
| gl->ActiveTexture (GL_TEXTURE0); |
| |
| gl->Enable (GL_TEXTURE_2D); |
| gl->BindTexture (GL_TEXTURE_2D, texture); |
| |
| gl->ClientActiveTexture (GL_TEXTURE0); |
| |
| 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); |
| } |
| #endif |
| #if GST_GL_HAVE_GLES2 |
| if (gst_gl_context_get_gl_api (context) & GST_GL_API_GLES2) { |
| const GLfloat vVertices[] = { |
| -1.0f, -1.0f, 0.0f, |
| 0.0f, 0.0f, |
| 1.0, -1.0f, 0.0f, |
| 1.0f, 0.0f, |
| 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f |
| }; |
| |
| GLushort indices[] = { 0, 1, 2, 0, 2, 3 }; |
| |
| /* glClear (GL_COLOR_BUFFER_BIT); */ |
| |
| /* Load the vertex position */ |
| gl->VertexAttribPointer (filter->draw_attr_position_loc, 3, GL_FLOAT, |
| GL_FALSE, 5 * sizeof (GLfloat), vVertices); |
| |
| /* Load the texture coordinate */ |
| gl->VertexAttribPointer (filter->draw_attr_texture_loc, 2, GL_FLOAT, |
| GL_FALSE, 5 * sizeof (GLfloat), &vVertices[3]); |
| |
| gl->EnableVertexAttribArray (filter->draw_attr_position_loc); |
| gl->EnableVertexAttribArray (filter->draw_attr_texture_loc); |
| |
| gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices); |
| |
| gl->DisableVertexAttribArray (filter->draw_attr_position_loc); |
| gl->DisableVertexAttribArray (filter->draw_attr_texture_loc); |
| } |
| #endif |
| } |