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gstglviewconvert.c
2440 lines (2108 loc) · 81.4 KB
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gstglviewconvert.c
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/*
* GStreamer
* Copyright (C) 2009 Julien Isorce <julien.isorce@mail.com>
* Copyright (C) 2014 Jan Schmidt <jan@centricular.com>
* Copyright (C) 2015 Matthew Waters <matthew@centricular.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.
*/
/**
* SECTION:gstglviewconvert
* @title: GstGLViewConvert
* @short_description: convert between steroscopic/multiview video formats
* @see_also: #GstGLColorConvert, #GstGLContext
*
* Convert stereoscopic/multiview video using fragment shaders.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstglviewconvert.h"
#include <gst/video/gstvideoaffinetransformationmeta.h>
#include "gl.h"
#include "gstglsl_private.h"
#include "gstglutils_private.h"
#define USING_OPENGL(context) (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL, 1, 0))
#define USING_OPENGL3(context) (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL3, 3, 1))
#define USING_GLES(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES, 1, 0))
#define USING_GLES2(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 2, 0))
#define USING_GLES3(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 3, 0))
static GstStaticCaps caps_template =
GST_STATIC_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, rectangle, external-oes } ");
#define GST_CAT_DEFAULT gst_gl_view_convert_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
enum
{
PROP_0,
PROP_INPUT_LAYOUT,
PROP_INPUT_FLAGS,
PROP_OUTPUT_LAYOUT,
PROP_OUTPUT_FLAGS,
PROP_OUTPUT_DOWNMIX_MODE
};
#define DEFAULT_DOWNMIX GST_GL_STEREO_DOWNMIX_ANAGLYPH_GREEN_MAGENTA_DUBOIS
struct _GstGLViewConvertPrivate
{
gboolean result;
GstVideoMultiviewMode input_mode;
GstVideoMultiviewFlags input_flags;
GstVideoMultiviewMode output_mode;
GstVideoMultiviewFlags output_flags;
GstBuffer *primary_in;
GstBuffer *auxilliary_in;
GstBuffer *primary_out;
GstBuffer *auxilliary_out;
GstGLMemory *in_tex[GST_VIDEO_MAX_PLANES];
GstGLMemory *out_tex[GST_VIDEO_MAX_PLANES];
guint n_out_tex;
GLuint vao;
GLuint vertex_buffer;
GLuint vbo_indices;
GLuint attr_position;
GLuint attr_texture;
};
#define DEBUG_INIT \
GST_DEBUG_CATEGORY_INIT (gst_gl_view_convert_debug, "glviewconvert", 0, "glviewconvert object");
G_DEFINE_TYPE_WITH_CODE (GstGLViewConvert, gst_gl_view_convert,
GST_TYPE_OBJECT, G_ADD_PRIVATE (GstGLViewConvert) DEBUG_INIT);
static void gst_gl_view_convert_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_gl_view_convert_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static void gst_gl_view_convert_finalize (GObject * object);
static void _do_view_convert (GstGLContext * context,
GstGLViewConvert * viewconvert);
/* *INDENT-OFF* */
/* These match the order and number of DOWNMIX_ANAGLYPH_* modes */
static GLfloat downmix_matrices[][2][9] = {
{ /* Green-Magenta Dubois */
{-0.062f, 0.284f, -0.015f, -0.158f, 0.668f, -0.027f, -0.039f, 0.143f, 0.021f},
{0.529f, -0.016f, 0.009f, 0.705f, -0.015f, 0.075f, 0.024f, -0.065f, 0.937f}
},
{ /* Red-Cyan Dubois */
/* Source of this matrix: http://www.site.uottawa.ca/~edubois/anaglyph/LeastSquaresHowToPhotoshop.pdf */
{0.437f, -0.062f, -0.048f, 0.449f, -0.062f, -0.050f, 0.164f, -0.024f, -0.017f},
{-0.011f, 0.377f, -0.026f, -0.032f, 0.761f, -0.093f, -0.007f, 0.009f, 1.234f}
},
{ /* Amber-blue Dubois */
{1.062f, -0.026f, -0.038f, -0.205f, 0.908f, -0.173f, 0.299f, 0.068f, 0.022f},
{-0.016f, 0.006f, 0.094f, -0.123f, 0.062f, 0.185f, -0.017f, -0.017f, 0.911f}
}
};
static gfloat identity_matrix[] = {
1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f,
};
/* *INDENT-ON* */
#define glsl_OES_extension_string "#extension GL_OES_EGL_image_external : require \n"
/* *INDENT-OFF* */
static const gchar *fragment_header =
"uniform sampler2D tex_l;\n"
"uniform sampler2D tex_r;\n"
"uniform float width;\n"
"uniform float height;\n"
"uniform mat3 downmix[2];\n"
"uniform vec2 tex_scale[2];\n"
"uniform vec2 offsets[2];\n";
static const gchar *frag_input =
" vec2 l_tex = v_texcoord * tex_scale[0] + offsets[0];\n"
" vec2 r_tex = v_texcoord * tex_scale[1] + offsets[1];\n"
" l = texture2D(tex_l, l_tex).rgba;\n"
" r = texture2D(tex_r, r_tex).rgba;\n";
static const gchar *frag_output_downmix =
" vec3 lcol = l.rgb * l.a + vec3(1.0-l.a);\n"
" vec3 rcol = r.rgb * r.a + vec3(1.0-r.a);\n"
" if (l.a + r.a > 0.0) {\n"
" lcol = clamp (downmix[0] * lcol, 0.0, 1.0);\n"
" rcol = clamp (downmix[1] * rcol, 0.0, 1.0);\n"
" gl_FragColor = vec4 (lcol + rcol, 1.0);\n"
" } else {\n"
" gl_FragColor = vec4 (0.0);\n"
" }\n";
static const gchar *frag_output_left =
" gl_FragColor = l;\n";
static const gchar *frag_output_right =
" gl_FragColor = r;\n";
static const gchar *frag_output_side_by_side =
" if (v_texcoord.x < 0.5) {\n"
" gl_FragColor = l;\n"
" } else {\n"
" gl_FragColor = r;\n"
" };\n";
static const gchar *frag_output_top_bottom =
"if (v_texcoord.y < 0.5) {\n"
" gl_FragColor = l;\n"
"} else {\n"
" gl_FragColor = r;\n"
"};\n";
static const gchar *frag_output_column_interleaved =
"if (int(mod(l_tex.x * width, 2.0)) == 0) {\n"
" gl_FragColor = l;\n"
"} else {\n"
" gl_FragColor = r;\n"
"};\n";
static const gchar *frag_output_row_interleaved =
"if (int(mod(l_tex.y * height, 2.0)) == 0) {\n"
" gl_FragColor = l;\n"
"} else {\n"
" gl_FragColor = r;\n"
"};\n";
static const gchar *frag_output_checkerboard =
"if (int(mod(l_tex.x * width, 2.0)) == \n"
" int(mod(l_tex.y * height, 2.0))) {\n"
" gl_FragColor = l;\n"
"} else {\n"
" gl_FragColor = r;\n"
"};\n";
static const gchar *frag_output_separated =
"gl_FragData[0] = l;\n"
"gl_FragData[1] = r;\n";
/* *INDENT-ON* */
static const GLfloat vertices[] = {
1.0f, -1.0f, 0.0f, 1.0f, 0.0f,
-1.0f, -1.0f, 0.0f, 0.0f, 0.0f,
-1.0f, 1.0f, 0.0f, 0.0f, 1.0f,
1.0f, 1.0f, 0.0f, 1.0f, 1.0f
};
static const GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
static void
gst_gl_view_convert_class_init (GstGLViewConvertClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
gobject_class->set_property = gst_gl_view_convert_set_property;
gobject_class->get_property = gst_gl_view_convert_get_property;
gobject_class->finalize = gst_gl_view_convert_finalize;
g_object_class_install_property (gobject_class, PROP_INPUT_LAYOUT,
g_param_spec_enum ("input-mode-override",
"Input Multiview Mode Override",
"Override any input information about multiview layout",
GST_TYPE_VIDEO_MULTIVIEW_MODE,
GST_VIDEO_MULTIVIEW_MODE_NONE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_INPUT_FLAGS,
g_param_spec_flags ("input-flags-override",
"Input Multiview Flags Override",
"Override any input information about multiview layout flags",
GST_TYPE_VIDEO_MULTIVIEW_FLAGS, GST_VIDEO_MULTIVIEW_FLAGS_NONE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_OUTPUT_LAYOUT,
g_param_spec_enum ("output-mode-override",
"Output Multiview Mode Override",
"Override automatic output mode selection for multiview layout",
GST_TYPE_VIDEO_MULTIVIEW_MODE, GST_VIDEO_MULTIVIEW_MODE_NONE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_OUTPUT_FLAGS,
g_param_spec_flags ("output-flags-override",
"Output Multiview Flags Override",
"Override automatic negotiation for output multiview layout flags",
GST_TYPE_VIDEO_MULTIVIEW_FLAGS, GST_VIDEO_MULTIVIEW_FLAGS_NONE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_OUTPUT_DOWNMIX_MODE,
g_param_spec_enum ("downmix-mode", "Mode for mono downmixed output",
"Output anaglyph type to generate when downmixing to mono",
GST_TYPE_GL_STEREO_DOWNMIX, DEFAULT_DOWNMIX,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
gst_gl_view_convert_init (GstGLViewConvert * convert)
{
convert->priv = gst_gl_view_convert_get_instance_private (convert);
convert->shader = NULL;
convert->downmix_mode = DEFAULT_DOWNMIX;
convert->priv->input_mode = GST_VIDEO_MULTIVIEW_MODE_NONE;
convert->priv->input_flags = GST_VIDEO_MULTIVIEW_FLAGS_NONE;
convert->priv->output_mode = GST_VIDEO_MULTIVIEW_MODE_NONE;
convert->priv->output_flags = GST_VIDEO_MULTIVIEW_FLAGS_NONE;
convert->input_mode_override = GST_VIDEO_MULTIVIEW_MODE_NONE;
convert->input_flags_override = GST_VIDEO_MULTIVIEW_FLAGS_NONE;
convert->output_mode_override = GST_VIDEO_MULTIVIEW_MODE_NONE;
convert->output_flags_override = GST_VIDEO_MULTIVIEW_FLAGS_NONE;
gst_video_info_init (&convert->in_info);
gst_video_info_init (&convert->out_info);
}
static void
gst_gl_view_convert_finalize (GObject * object)
{
GstGLViewConvert *viewconvert;
viewconvert = GST_GL_VIEW_CONVERT (object);
gst_gl_view_convert_reset (viewconvert);
gst_buffer_replace (&viewconvert->priv->primary_in, NULL);
gst_buffer_replace (&viewconvert->priv->auxilliary_in, NULL);
gst_buffer_replace (&viewconvert->priv->primary_out, NULL);
gst_buffer_replace (&viewconvert->priv->auxilliary_out, NULL);
if (viewconvert->context) {
gst_object_unref (viewconvert->context);
viewconvert->context = NULL;
}
G_OBJECT_CLASS (gst_gl_view_convert_parent_class)->finalize (object);
}
/**
* gst_gl_view_convert_new:
*
* Returns: (transfer full): a new #GstGLViewConvert
*
* Since: 1.6
*/
GstGLViewConvert *
gst_gl_view_convert_new (void)
{
GstGLViewConvert *convert;
convert = g_object_new (GST_TYPE_GL_VIEW_CONVERT, NULL);
gst_object_ref_sink (convert);
return convert;
}
static void
_reset_gl (GstGLContext * context, GstGLViewConvert * viewconvert)
{
const GstGLFuncs *gl = context->gl_vtable;
if (viewconvert->priv->vao) {
gl->DeleteVertexArrays (1, &viewconvert->priv->vao);
viewconvert->priv->vao = 0;
}
if (viewconvert->priv->vertex_buffer) {
gl->DeleteBuffers (1, &viewconvert->priv->vertex_buffer);
viewconvert->priv->vertex_buffer = 0;
}
if (viewconvert->priv->vbo_indices) {
gl->DeleteBuffers (1, &viewconvert->priv->vbo_indices);
viewconvert->priv->vbo_indices = 0;
}
}
/**
* gst_gl_view_convert_set_context:
* @viewconvert: a #GstGLViewConvert
* @context: the #GstGLContext to set
*
* Set @context on @viewconvert
*
* Since: 1.6
*/
void
gst_gl_view_convert_set_context (GstGLViewConvert * viewconvert,
GstGLContext * context)
{
GstGLContext *old_context = NULL;
g_return_if_fail (GST_IS_GL_VIEW_CONVERT (viewconvert));
GST_OBJECT_LOCK (viewconvert);
if (context != viewconvert->context) {
gst_gl_view_convert_reset (viewconvert);
if (viewconvert->context)
old_context = viewconvert->context;
viewconvert->context = context ? gst_object_ref (context) : NULL;
}
GST_OBJECT_UNLOCK (viewconvert);
gst_clear_object (&old_context);
}
static gboolean
_view_convert_set_format (GstGLViewConvert * viewconvert,
const GstVideoInfo * in_info, GstGLTextureTarget from_target,
const GstVideoInfo * out_info, GstGLTextureTarget to_target)
{
gboolean passthrough;
g_return_val_if_fail (GST_IS_GL_VIEW_CONVERT (viewconvert), FALSE);
if (gst_video_info_is_equal (in_info, &viewconvert->in_info) &&
gst_video_info_is_equal (out_info, &viewconvert->out_info) &&
viewconvert->from_texture_target == from_target &&
viewconvert->to_texture_target == to_target)
return TRUE;
if (GST_VIDEO_INFO_FORMAT (in_info) != GST_VIDEO_FORMAT_RGBA ||
GST_VIDEO_INFO_FORMAT (out_info) != GST_VIDEO_FORMAT_RGBA) {
GST_ERROR_OBJECT (viewconvert,
"Multiview conversion can currently only be performed on RGBA textures");
return FALSE;
}
passthrough = gst_video_info_is_equal (in_info, out_info) &&
from_target == to_target;
if (!passthrough && to_target != GST_GL_TEXTURE_TARGET_2D
&& to_target != GST_GL_TEXTURE_TARGET_RECTANGLE)
return FALSE;
/* FIXME: Compare what changed and decide if we need a full reset or not */
GST_OBJECT_LOCK (viewconvert);
gst_gl_view_convert_reset (viewconvert);
viewconvert->in_info = *in_info;
viewconvert->out_info = *out_info;
viewconvert->from_texture_target = from_target;
viewconvert->to_texture_target = to_target;
viewconvert->caps_passthrough = passthrough;
gst_buffer_replace (&viewconvert->priv->primary_in, NULL);
gst_buffer_replace (&viewconvert->priv->auxilliary_in, NULL);
gst_buffer_replace (&viewconvert->priv->primary_out, NULL);
gst_buffer_replace (&viewconvert->priv->auxilliary_out, NULL);
GST_OBJECT_UNLOCK (viewconvert);
return TRUE;
}
/**
* gst_gl_view_convert_set_caps:
* @viewconvert: a #GstGLViewConvert
* @in_caps: input #GstCaps
* @out_caps: output #GstCaps
*
* Initializes @viewconvert with the information required for conversion.
*
* Since: 1.6
*/
gboolean
gst_gl_view_convert_set_caps (GstGLViewConvert * viewconvert,
GstCaps * in_caps, GstCaps * out_caps)
{
GstVideoInfo in_info, out_info;
GstCapsFeatures *in_features, *out_features;
GstGLTextureTarget from_target = GST_GL_TEXTURE_TARGET_2D;
GstGLTextureTarget to_target = GST_GL_TEXTURE_TARGET_2D;
g_return_val_if_fail (GST_IS_GL_VIEW_CONVERT (viewconvert), FALSE);
g_return_val_if_fail (GST_IS_CAPS (in_caps), FALSE);
g_return_val_if_fail (GST_IS_CAPS (out_caps), FALSE);
GST_INFO_OBJECT (viewconvert,
"Configuring multiview conversion from caps %" GST_PTR_FORMAT
" to %" GST_PTR_FORMAT, in_caps, out_caps);
in_features = gst_caps_get_features (in_caps, 0);
out_features = gst_caps_get_features (out_caps, 0);
if (!gst_caps_features_contains (in_features,
GST_CAPS_FEATURE_MEMORY_GL_MEMORY))
return FALSE;
if (!gst_caps_features_contains (out_features,
GST_CAPS_FEATURE_MEMORY_GL_MEMORY))
return FALSE;
if (!gst_video_info_from_caps (&in_info, in_caps))
return FALSE;
if (!gst_video_info_from_caps (&out_info, out_caps))
return FALSE;
{
GstStructure *in_s = gst_caps_get_structure (in_caps, 0);
GstStructure *out_s = gst_caps_get_structure (out_caps, 0);
if (gst_structure_has_field_typed (in_s, "texture-target", G_TYPE_STRING)) {
from_target =
gst_gl_texture_target_from_string (gst_structure_get_string (in_s,
"texture-target"));
}
if (gst_structure_has_field_typed (out_s, "texture-target", G_TYPE_STRING)) {
to_target =
gst_gl_texture_target_from_string (gst_structure_get_string (out_s,
"texture-target"));
}
if (to_target == GST_GL_TEXTURE_TARGET_NONE
|| from_target == GST_GL_TEXTURE_TARGET_NONE)
/* invalid caps */
return FALSE;
}
return _view_convert_set_format (viewconvert, &in_info, from_target,
&out_info, to_target);
}
/* Function that can halve the value
* of ints, fractions, int/fraction ranges and lists of ints/fractions */
static gboolean
_halve_value (GValue * out, const GValue * in_value)
{
/* Fundamental fixed types first */
if (G_VALUE_HOLDS_INT (in_value)) {
g_value_init (out, G_TYPE_INT);
g_value_set_int (out, MAX (g_value_get_int (in_value) / 2, 1));
} else if (GST_VALUE_HOLDS_FRACTION (in_value)) {
gint num, den;
num = gst_value_get_fraction_numerator (in_value);
den = gst_value_get_fraction_denominator (in_value);
g_value_init (out, GST_TYPE_FRACTION);
/* Don't adjust 'infinite' fractions */
if ((num != 1 || den != 2147483647) && (num != 2147483647 || den != 1)) {
/* FIXME - could do better approximation when den > G_MAXINT/2? */
den = den > G_MAXINT / 2 ? G_MAXINT : den * 2;
}
gst_value_set_fraction (out, num, den);
} else if (GST_VALUE_HOLDS_INT_RANGE (in_value)) {
gint range_min = gst_value_get_int_range_min (in_value);
gint range_max = gst_value_get_int_range_max (in_value);
gint range_step = gst_value_get_int_range_step (in_value);
g_value_init (out, GST_TYPE_INT_RANGE);
if (range_min != 1)
range_min = MAX (1, range_min / 2);
if (range_max != G_MAXINT)
range_max = MAX (1, range_max / 2);
gst_value_set_int_range_step (out, range_min,
range_max, MAX (1, range_step / 2));
} else if (GST_VALUE_HOLDS_FRACTION_RANGE (in_value)) {
GValue min_out = G_VALUE_INIT;
GValue max_out = G_VALUE_INIT;
const GValue *range_min = gst_value_get_fraction_range_min (in_value);
const GValue *range_max = gst_value_get_fraction_range_max (in_value);
_halve_value (&min_out, range_min);
_halve_value (&max_out, range_max);
g_value_init (out, GST_TYPE_FRACTION_RANGE);
gst_value_set_fraction_range (out, &min_out, &max_out);
g_value_unset (&min_out);
g_value_unset (&max_out);
} else if (GST_VALUE_HOLDS_LIST (in_value)) {
gint i;
g_value_init (out, GST_TYPE_LIST);
for (i = 0; i < gst_value_list_get_size (in_value); i++) {
const GValue *entry;
GValue tmp = G_VALUE_INIT;
entry = gst_value_list_get_value (in_value, i);
/* Random list values might not be the right type */
if (!_halve_value (&tmp, entry))
goto fail;
gst_value_list_append_and_take_value (out, &tmp);
}
} else {
return FALSE;
}
return TRUE;
fail:
g_value_unset (out);
return FALSE;
}
static GstStructure *
_halve_structure_field (const GstStructure * in, const gchar * field_name)
{
GstStructure *out;
const GValue *in_value = gst_structure_get_value (in, field_name);
GValue tmp = G_VALUE_INIT;
if (G_UNLIKELY (in_value == NULL))
return gst_structure_copy (in); /* Field doesn't exist, leave it as is */
if (!_halve_value (&tmp, in_value))
return NULL;
out = gst_structure_copy (in);
gst_structure_set_value (out, field_name, &tmp);
g_value_unset (&tmp);
return out;
}
/* Function that can double the value
* of ints, fractions, int/fraction ranges and lists of ints/fractions */
static gboolean
_double_value (GValue * out, const GValue * in_value)
{
/* Fundamental fixed types first */
if (G_VALUE_HOLDS_INT (in_value)) {
gint n = g_value_get_int (in_value);
g_value_init (out, G_TYPE_INT);
if (n <= G_MAXINT / 2)
g_value_set_int (out, n * 2);
else
g_value_set_int (out, G_MAXINT);
} else if (GST_VALUE_HOLDS_FRACTION (in_value)) {
gint num, den;
num = gst_value_get_fraction_numerator (in_value);
den = gst_value_get_fraction_denominator (in_value);
g_value_init (out, GST_TYPE_FRACTION);
/* Don't adjust 'infinite' fractions */
if ((num != 1 || den != 2147483647) && (num != 2147483647 || den != 1)) {
/* FIXME - could do better approximation when num > G_MAXINT/2? */
num = num > G_MAXINT / 2 ? G_MAXINT : num * 2;
}
gst_value_set_fraction (out, num, den);
} else if (GST_VALUE_HOLDS_INT_RANGE (in_value)) {
gint range_min = gst_value_get_int_range_min (in_value);
gint range_max = gst_value_get_int_range_max (in_value);
gint range_step = gst_value_get_int_range_step (in_value);
if (range_min != 1) {
range_min = MIN (G_MAXINT / 2, range_min);
range_min *= 2;
}
if (range_max != G_MAXINT) {
range_max = MIN (G_MAXINT / 2, range_max);
range_max *= 2;
}
range_step = MIN (G_MAXINT / 2, range_step);
g_value_init (out, GST_TYPE_INT_RANGE);
gst_value_set_int_range_step (out, range_min, range_max, range_step);
} else if (GST_VALUE_HOLDS_FRACTION_RANGE (in_value)) {
GValue min_out = G_VALUE_INIT;
GValue max_out = G_VALUE_INIT;
const GValue *range_min = gst_value_get_fraction_range_min (in_value);
const GValue *range_max = gst_value_get_fraction_range_max (in_value);
_double_value (&min_out, range_min);
_double_value (&max_out, range_max);
g_value_init (out, GST_TYPE_FRACTION_RANGE);
gst_value_set_fraction_range (out, &min_out, &max_out);
g_value_unset (&min_out);
g_value_unset (&max_out);
} else if (GST_VALUE_HOLDS_LIST (in_value)) {
gint i;
g_value_init (out, GST_TYPE_LIST);
for (i = 0; i < gst_value_list_get_size (in_value); i++) {
const GValue *entry;
GValue tmp = G_VALUE_INIT;
entry = gst_value_list_get_value (in_value, i);
/* Random list values might not be the right type */
if (!_double_value (&tmp, entry))
goto fail;
gst_value_list_append_and_take_value (out, &tmp);
}
} else {
return FALSE;
}
return TRUE;
fail:
g_value_unset (out);
return FALSE;
}
static GstStructure *
_double_structure_field (const GstStructure * in, const gchar * field_name)
{
GstStructure *out;
const GValue *in_value = gst_structure_get_value (in, field_name);
GValue tmp = G_VALUE_INIT;
if (G_UNLIKELY (in_value == NULL))
return gst_structure_copy (in); /* Field doesn't exist, leave it as is */
if (!_double_value (&tmp, in_value))
return NULL;
out = gst_structure_copy (in);
gst_structure_set_value (out, field_name, &tmp);
g_value_unset (&tmp);
return out;
}
/* Return a copy of the caps with the requested field halved in value/range */
#if 0
static GstCaps *
_halve_caps_field (const GstCaps * in, const gchar * field_name)
{
gint i;
GstCaps *out = gst_caps_new_empty ();
for (i = 0; i < gst_caps_get_size (in); i++) {
const GstStructure *cur = gst_caps_get_structure (in, i);
GstCapsFeatures *f = gst_caps_get_features (in, i);
GstStructure *res = _halve_structure_field (cur, field_name);
out =
gst_caps_merge_structure_full (out, res,
f ? gst_caps_features_copy (f) : NULL);
}
return out;
}
#endif
/* Return a copy of the caps with the requested field doubled in value/range */
static GstCaps *
_double_caps_field (const GstCaps * in, const gchar * field_name)
{
gint i;
GstCaps *out = gst_caps_new_empty ();
for (i = 0; i < gst_caps_get_size (in); i++) {
const GstStructure *cur = gst_caps_get_structure (in, i);
GstCapsFeatures *f = gst_caps_get_features (in, i);
GstStructure *res = _double_structure_field (cur, field_name);
out =
gst_caps_merge_structure_full (out, res,
f ? gst_caps_features_copy (f) : NULL);
}
return out;
}
/* Takes ownership of the input caps */
static GstCaps *
_expand_par_for_half_aspect (GstCaps * in, gboolean vertical_half_aspect)
{
guint mview_flags, mview_flags_mask;
GstCaps *out;
GstStructure *tmp;
out = gst_caps_new_empty ();
while (gst_caps_get_size (in) > 0) {
GstStructure *s;
GstCapsFeatures *features;
features = gst_caps_get_features (in, 0);
if (features)
features = gst_caps_features_copy (features);
s = gst_caps_steal_structure (in, 0);
if (!gst_structure_get_flagset (s, "multiview-flags", &mview_flags,
&mview_flags_mask)) {
gst_caps_append_structure_full (out, s, features);
continue;
}
/* If the input doesn't care about the half-aspect flag, allow current PAR in either variant */
if ((mview_flags_mask & GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT) == 0) {
gst_caps_append_structure_full (out, s, features);
continue;
}
if (!gst_structure_has_field (s, "pixel-aspect-ratio")) {
/* No par field, dont-care the half-aspect flag */
gst_structure_set (s, "multiview-flags",
GST_TYPE_VIDEO_MULTIVIEW_FLAGSET,
mview_flags & ~GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT,
mview_flags_mask & ~GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT, NULL);
gst_caps_append_structure_full (out, s, features);
continue;
}
/* Halve or double PAR base on inputs input specified. */
/* Append a copy with the half-aspect flag as-is */
tmp = gst_structure_copy (s);
out = gst_caps_merge_structure_full (out, tmp,
features ? gst_caps_features_copy (features) : NULL);
/* and then a copy inverted */
if (mview_flags & GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT) {
/* Input is half-aspect. Double/halve the PAR, clear the flag */
if (vertical_half_aspect)
tmp = _halve_structure_field (s, "pixel-aspect-ratio");
else
tmp = _double_structure_field (s, "pixel-aspect-ratio");
/* Clear the flag */
gst_structure_set (tmp, "multiview-flags",
GST_TYPE_VIDEO_MULTIVIEW_FLAGSET,
mview_flags & ~GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT,
mview_flags_mask | GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT, NULL);
} else {
if (vertical_half_aspect)
tmp = _double_structure_field (s, "pixel-aspect-ratio");
else
tmp = _halve_structure_field (s, "pixel-aspect-ratio");
/* Set the flag */
gst_structure_set (tmp, "multiview-flags",
GST_TYPE_VIDEO_MULTIVIEW_FLAGSET,
mview_flags | GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT,
mview_flags_mask | GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT, NULL);
}
out = gst_caps_merge_structure_full (out, tmp,
features ? gst_caps_features_copy (features) : NULL);
gst_structure_free (s);
if (features)
gst_caps_features_free (features);
}
gst_caps_unref (in);
return out;
}
/* If input supports top-bottom or row-interleaved, we may halve height to mono frames.
* If input supports left-right, checkerboard, quincunx or column-interleaved,
* we may halve width to mono frames.
* For output of top-bottom or row-interleaved, we may double the mono height
* For output of left-right, checkerboard, quincunx or column-interleaved,
* we may double the mono width.
* In all cases, if input has half-aspect and output does not, we may double the PAR
* And if input does *not* have half-aspect flag and output does not, we may halve the PAR
*/
static GstCaps *
_expand_structure (GstGLViewConvert * viewconvert,
GstCaps * out_caps, GstStructure * structure, GstCapsFeatures * features)
{
GstCaps *expanded_caps, *tmp;
GstCaps *mono_caps;
const gchar *default_mview_mode_str = NULL;
guint mview_flags, mview_flags_mask;
const GValue *in_modes;
gint i;
/* Empty caps to accumulate into */
expanded_caps = gst_caps_new_empty ();
/* First, set defaults if multiview flags are missing */
default_mview_mode_str =
gst_video_multiview_mode_to_caps_string (GST_VIDEO_MULTIVIEW_MODE_MONO);
mview_flags = GST_VIDEO_MULTIVIEW_FLAGS_NONE;
mview_flags_mask = GST_FLAG_SET_MASK_EXACT;
if (!gst_structure_has_field (structure, "multiview-mode")) {
gst_structure_set (structure,
"multiview-mode", G_TYPE_STRING, default_mview_mode_str, NULL);
}
if (!gst_structure_has_field (structure, "multiview-flags")) {
gst_structure_set (structure,
"multiview-flags", GST_TYPE_VIDEO_MULTIVIEW_FLAGSET, mview_flags,
mview_flags_mask, NULL);
} else {
gst_structure_get_flagset (structure, "multiview-flags",
&mview_flags, &mview_flags_mask);
}
in_modes = gst_structure_get_value (structure, "multiview-mode");
mono_caps = gst_caps_new_empty ();
if (gst_value_intersect (NULL, in_modes,
gst_video_multiview_get_mono_modes ())) {
GstStructure *new_struct = gst_structure_copy (structure);
gst_structure_set_value (new_struct, "multiview-mode",
gst_video_multiview_get_mono_modes ());
/* Half-aspect makes no sense for mono or unpacked, get rid of it */
if (mview_flags & GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT) {
gst_structure_set (new_struct, "multiview-flags",
GST_TYPE_VIDEO_MULTIVIEW_FLAGSET,
mview_flags & ~GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT,
mview_flags_mask & ~GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT, NULL);
}
gst_caps_append_structure_full (mono_caps, new_struct,
features ? gst_caps_features_copy (features) : NULL);
}
if (gst_value_intersect (NULL, in_modes,
gst_video_multiview_get_unpacked_modes ())) {
GstStructure *new_struct = gst_structure_copy (structure);
gst_structure_set_value (new_struct, "multiview-mode",
gst_video_multiview_get_mono_modes ());
/* Half-aspect makes no sense for mono or unpacked, get rid of it */
if (mview_flags & GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT) {
gst_structure_set (new_struct, "multiview-flags",
GST_TYPE_VIDEO_MULTIVIEW_FLAGSET,
mview_flags & ~GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT,
mview_flags_mask & ~GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT, NULL);
}
gst_caps_append_structure_full (mono_caps, new_struct,
features ? gst_caps_features_copy (features) : NULL);
}
if (gst_value_intersect (NULL, in_modes,
gst_video_multiview_get_doubled_height_modes ())) {
/* Append mono formats with height halved */
GstStructure *new_struct = _halve_structure_field (structure, "height");
gst_structure_set_value (new_struct, "multiview-mode",
gst_video_multiview_get_mono_modes ());
/* Normalise the half-aspect flag away */
if (mview_flags & GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT) {
GstStructure *s =
_halve_structure_field (new_struct, "pixel-aspect-ratio");
gst_structure_set (structure, "multiview-flags",
GST_TYPE_VIDEO_MULTIVIEW_FLAGSET,
mview_flags & ~GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT,
mview_flags_mask | GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT, NULL);
gst_structure_free (new_struct);
new_struct = s;
}
mono_caps = gst_caps_merge_structure_full (mono_caps, new_struct,
features ? gst_caps_features_copy (features) : NULL);
}
if (gst_value_intersect (NULL, in_modes,
gst_video_multiview_get_doubled_width_modes ())) {
/* Append mono formats with width halved */
GstStructure *new_struct = _halve_structure_field (structure, "width");
gst_structure_set_value (new_struct, "multiview-mode",
gst_video_multiview_get_mono_modes ());
/* Normalise the half-aspect flag away */
if (mview_flags & GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT) {
GstStructure *s =
_double_structure_field (new_struct, "pixel-aspect-ratio");
gst_structure_set (structure, "multiview-flags",
GST_TYPE_VIDEO_MULTIVIEW_FLAGSET,
mview_flags & ~GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT,
mview_flags_mask | GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT, NULL);
gst_structure_free (new_struct);
new_struct = s;
}
mono_caps = gst_caps_merge_structure_full (mono_caps, new_struct,
features ? gst_caps_features_copy (features) : NULL);
}
if (gst_value_intersect (NULL, in_modes,
gst_video_multiview_get_doubled_size_modes ())) {
/* Append checkerboard/doubled size formats with width & height halved */
GstStructure *new_struct_w = _halve_structure_field (structure, "width");
GstStructure *new_struct_wh =
_halve_structure_field (new_struct_w, "height");
gst_structure_free (new_struct_w);
gst_structure_set_value (new_struct_wh, "multiview-mode",
gst_video_multiview_get_mono_modes ());
mono_caps = gst_caps_merge_structure_full (mono_caps, new_struct_wh,
features ? gst_caps_features_copy (features) : NULL);
}
/* Everything is normalised now, unset the flags we can change */
/* Remove the views field, as these are all 'mono' modes
* Need to do this before we expand caps back out to frame packed modes */
for (i = 0; i < gst_caps_get_size (mono_caps); i++) {
GstStructure *s = gst_caps_get_structure (mono_caps, i);
gst_structure_remove_fields (s, "views", NULL);
if (gst_structure_get_flagset (s, "multiview-flags", &mview_flags,
&mview_flags_mask)) {
/* Preserve only the half-aspect and mixed-mono flags, for now.
* The rest we can change */
mview_flags_mask &=
(GST_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT |
GST_VIDEO_MULTIVIEW_FLAGS_MIXED_MONO);
gst_structure_set (s, "multiview-flags", GST_TYPE_VIDEO_MULTIVIEW_FLAGSET,
mview_flags, mview_flags_mask, NULL);
}
}
GST_TRACE_OBJECT (viewconvert,
"Collected single-view caps %" GST_PTR_FORMAT, mono_caps);
/* Put unpacked and mono modes first. We don't care about flags. Clear them */
tmp = gst_caps_copy (mono_caps);
for (i = 0; i < gst_caps_get_size (tmp); i++) {
GstStructure *s = gst_caps_get_structure (tmp, i);
gst_structure_remove_fields (s, "views", NULL);
if (gst_structure_get_flagset (s, "multiview-flags", &mview_flags,
&mview_flags_mask)) {
/* We can change any flags for mono modes - half-aspect and mixed-mono have no meaning */
mview_flags_mask = 0;
gst_structure_set (s, "multiview-flags", GST_TYPE_VIDEO_MULTIVIEW_FLAGSET,
mview_flags, mview_flags_mask, NULL);
}
}
expanded_caps = gst_caps_merge (expanded_caps, tmp);
/* Unpacked output modes have 2 views, for now */
tmp = gst_caps_copy (mono_caps);
gst_caps_set_value (tmp, "multiview-mode",
gst_video_multiview_get_unpacked_modes ());
for (i = 0; i < gst_caps_get_size (tmp); i++) {
GstStructure *s = gst_caps_get_structure (tmp, i);
gst_structure_set (s, "views", G_TYPE_INT, 2, NULL);
if (gst_structure_get_flagset (s, "multiview-flags", &mview_flags,
&mview_flags_mask)) {
/* We can change any flags for unpacked modes - half-aspect and mixed-mono have no meaning */
mview_flags_mask = 0;
gst_structure_set (s, "multiview-flags", GST_TYPE_VIDEO_MULTIVIEW_FLAGSET,
mview_flags, mview_flags_mask, NULL);
}
}
expanded_caps = gst_caps_merge (expanded_caps, tmp);
/* Double height output modes */
tmp = _double_caps_field (mono_caps, "height");
gst_caps_set_value (tmp, "multiview-mode",
gst_video_multiview_get_doubled_height_modes ());
tmp = _expand_par_for_half_aspect (tmp, TRUE);
expanded_caps = gst_caps_merge (expanded_caps, tmp);
/* Double width output modes */
tmp = _double_caps_field (mono_caps, "width");
gst_caps_set_value (tmp, "multiview-mode",
gst_video_multiview_get_doubled_width_modes ());
tmp = _expand_par_for_half_aspect (tmp, FALSE);
expanded_caps = gst_caps_merge (expanded_caps, tmp);
/* Double size output modes */
{
GstCaps *tmp_w = _double_caps_field (mono_caps, "width");
tmp = _double_caps_field (tmp_w, "height");
gst_caps_unref (tmp_w);