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glcolorbalance: Support OES textures for input/passthrough

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glcolorbalance is in the default GL path inside glimagesink,
so has been causing an possibly-unnecessary extra texture copy
on Android for a while now. If we're just doing passthrough,
we can support OES directly. If not, they'll be transformed
to 2D textures and colourbalanced.
This commit is contained in:
Jan Schmidt 2018-02-27 23:22:24 +11:00
parent 1e28cba088
commit 567bbe3c07
1 changed files with 82 additions and 5 deletions
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87
ext/gl/gstglcolorbalance.c
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@ -54,17 +54,55 @@ GST_DEBUG_CATEGORY_STATIC (glcolorbalance_debug);
#define DEFAULT_PROP_HUE 0.0
#define DEFAULT_PROP_SATURATION 1.0
#define GST_GL_COLOR_BALANCE_VIDEO_CAPS \
"video/x-raw(" GST_CAPS_FEATURE_MEMORY_GL_MEMORY "), " \
"format = (string) RGBA, " \
"width = " GST_VIDEO_SIZE_RANGE ", " \
"height = " GST_VIDEO_SIZE_RANGE ", " \
"framerate = " GST_VIDEO_FPS_RANGE ", " \
"texture-target = (string) { 2D, external-oes } " \
" ; " \
"video/x-raw(" GST_CAPS_FEATURE_MEMORY_GL_MEMORY "," \
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION "), " \
"format = (string) RGBA, " \
"width = " GST_VIDEO_SIZE_RANGE ", " \
"height = " GST_VIDEO_SIZE_RANGE ", " \
"framerate = " GST_VIDEO_FPS_RANGE ", " \
"texture-target = (string) { 2D, external-oes }"
static GstStaticPadTemplate gst_gl_color_balance_element_src_pad_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_GL_COLOR_BALANCE_VIDEO_CAPS));
static GstStaticPadTemplate gst_gl_color_balance_element_sink_pad_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_GL_COLOR_BALANCE_VIDEO_CAPS));
/* *INDENT-OFF* */
static const gchar *color_balance_frag =
static const gchar color_balance_frag_OES_preamble[] =
"#extension GL_OES_EGL_image_external : require\n"
"#ifdef GL_ES\n"
"precision mediump float;\n"
"#endif\n"
"uniform samplerExternalOES tex;\n";
static const gchar color_balance_frag_2D_preamble[] =
"#ifdef GL_ES\n"
"precision mediump float;\n"
"#endif\n"
"uniform sampler2D tex;\n";
static const gchar color_balance_frag_templ[] =
"%s\n" // Preamble
"uniform float brightness;\n"
"uniform float contrast;\n"
"uniform float saturation;\n"
"uniform float hue;\n"
"varying vec2 v_texcoord;\n"
"uniform sampler2D tex;\n"
"#define from_yuv_bt601_offset vec3(-0.0625, -0.5, -0.5)\n"
"#define from_yuv_bt601_rcoeff vec3(1.164, 0.000, 1.596)\n"
"#define from_yuv_bt601_gcoeff vec3(1.164,-0.391,-0.813)\n"
@ -105,7 +143,7 @@ static const gchar *color_balance_frag =
* blend-function-src-rgb=src-color and blend-function-dst-rgb=dst-color */
" float hue_cos = cos (PI * hue);\n"
" float hue_sin = sin (PI * hue);\n"
" vec4 rgba = texture2D (tex, v_texcoord);\n"
" vec4 rgba = %s (tex, v_texcoord);\n" /* texture2D / texture2DOES */
" yuv = rgb_to_yuv (rgba.rgb);\n"
" yuv.x = clamp (luma_to_narrow (luma_to_full(yuv.x) * contrast) + brightness, 0.0, 1.0);\n"
" vec2 uv = yuv.yz;\n"
@ -139,6 +177,28 @@ G_DEFINE_TYPE_WITH_CODE (GstGLColorBalance, gst_gl_color_balance,
G_IMPLEMENT_INTERFACE (GST_TYPE_COLOR_BALANCE,
gst_gl_color_balance_colorbalance_init));
static GstCaps *
gcb_transform_internal_caps (GstGLFilter * filter,
GstPadDirection direction, GstCaps * caps, GstCaps * filter_caps)
{
GstCaps *tmp = gst_caps_make_writable (caps);
gint i;
/* If we're not in passthrough mode, we can only output 2D textures,
* but can always receive any compatible texture.
* This function is not called in passthrough mode, so we can do the
* transform unconditionally */
for (i = 0; i < gst_caps_get_size (tmp); i++) {
GstStructure *outs = gst_caps_get_structure (tmp, i);
if (direction == GST_PAD_SINK) {
gst_structure_set (outs, "texture-target", G_TYPE_STRING,
gst_gl_texture_target_to_string (GST_GL_TEXTURE_TARGET_2D), NULL);
} else {
gst_structure_remove_field (outs, "texture-target");
}
}
return tmp;
}
static gboolean
gst_gl_color_balance_is_passthrough (GstGLColorBalance * glcolorbalance)
{
@ -169,22 +229,35 @@ _create_shader (GstGLColorBalance * balance)
GstGLBaseFilter *base_filter = GST_GL_BASE_FILTER (balance);
GstGLFilter *filter = GST_GL_FILTER (balance);
GError *error = NULL;
gchar *frag_str;
if (balance->shader)
gst_object_unref (balance->shader);
/* Can support rectangle textures in the future if needed */
if (filter->in_texture_target == GST_GL_TEXTURE_TARGET_2D)
frag_str =
g_strdup_printf (color_balance_frag_templ,
color_balance_frag_2D_preamble, "texture2D");
else
frag_str =
g_strdup_printf (color_balance_frag_templ,
color_balance_frag_OES_preamble, "texture2D");
if (!(balance->shader =
gst_gl_shader_new_link_with_stages (base_filter->context, &error,
gst_glsl_stage_new_default_vertex (base_filter->context),
gst_glsl_stage_new_with_string (base_filter->context,
GL_FRAGMENT_SHADER, GST_GLSL_VERSION_NONE,
GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
color_balance_frag), NULL))) {
frag_str), NULL))) {
g_free (frag_str);
GST_ELEMENT_ERROR (balance, RESOURCE, NOT_FOUND, ("%s",
"Failed to initialize colorbalance shader"), ("%s",
error ? error->message : "Unknown error"));
return FALSE;
}
g_free (frag_str);
filter->draw_attr_position_loc =
gst_gl_shader_get_attribute_location (balance->shader, "a_position");
@ -292,7 +365,10 @@ gst_gl_color_balance_class_init (GstGLColorBalanceClass * klass)
GST_DEBUG_CATEGORY_INIT (glcolorbalance_debug, "glcolorbalance", 0,
"glcolorbalance");
gst_gl_filter_add_rgba_pad_templates (GST_GL_FILTER_CLASS (klass));
gst_element_class_add_static_pad_template (gstelement_class,
&gst_gl_color_balance_element_src_pad_template);
gst_element_class_add_static_pad_template (gstelement_class,
&gst_gl_color_balance_element_sink_pad_template);
gobject_class->finalize = gst_gl_color_balance_finalize;
gobject_class->set_property = gst_gl_color_balance_set_property;
@ -329,6 +405,7 @@ gst_gl_color_balance_class_init (GstGLColorBalanceClass * klass)
filter_class->filter_texture =
GST_DEBUG_FUNCPTR (gst_gl_color_balance_filter_texture);
filter_class->transform_internal_caps = gcb_transform_internal_caps;
}
static void