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glvideomixer: support input frame scaling

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This commit is contained in:
Matthew Waters 2014-06-15 13:44:04 +10:00
parent 5a6bef5c59
commit b7f1015359
1 changed files with 34 additions and 2 deletions
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36
ext/gl/gstglvideomixer.c
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@ -114,6 +114,7 @@ struct _GstGLVideoMixerPad
/* < private > */
/* properties */
gint xpos, ypos;
gint width, height;
guint zorder;
gdouble alpha;
};
@ -135,6 +136,8 @@ static void gst_gl_video_mixer_pad_get_property (GObject * object,
#define DEFAULT_PAD_ZORDER 0
#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
enum
{
@ -142,6 +145,8 @@ enum
PROP_PAD_ZORDER,
PROP_PAD_XPOS,
PROP_PAD_YPOS,
PROP_PAD_WIDTH,
PROP_PAD_HEIGHT,
PROP_PAD_ALPHA
};
@ -170,6 +175,14 @@ gst_gl_video_mixer_pad_class_init (GstGLVideoMixerPadClass * klass)
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,
@ -192,6 +205,12 @@ gst_gl_video_mixer_pad_get_property (GObject * object, guint prop_id,
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;
@ -230,6 +249,12 @@ gst_gl_video_mixer_pad_set_property (GObject * object, guint prop_id,
case PROP_PAD_YPOS:
pad->ypos = g_value_get_int (value);
break;
case PROP_PAD_WIDTH:
pad->width = g_value_get_int (value);
break;
case PROP_PAD_HEIGHT:
pad->height = g_value_get_int (value);
break;
case PROP_PAD_ALPHA:
pad->alpha = g_value_get_double (value);
break;
@ -387,6 +412,7 @@ gst_gl_video_mixer_callback (gpointer stuff)
/* *INDENT-ON* */
guint in_tex;
guint in_width, in_height;
guint pad_width, pad_height;
gfloat w, h;
frame = g_ptr_array_index (video_mixer->input_frames, count);
@ -406,15 +432,21 @@ gst_gl_video_mixer_callback (gpointer stuff)
continue;
}
in_tex = frame->texture;
pad_width = pad->width <= 0 ? in_width : pad->width;
pad_height = pad->height <= 0 ? in_height : pad->height;
w = ((gfloat) in_width / (gfloat) out_width);
h = ((gfloat) in_height / (gfloat) out_height);
w = ((gfloat) pad_width / (gfloat) out_width);
h = ((gfloat) pad_height / (gfloat) out_height);
/* top-left */
v_vertices[0] = v_vertices[15] =
2.0f * (gfloat) pad->xpos / (gfloat) out_width - 1.0f;
/* bottom-left */
v_vertices[1] = v_vertices[6] =
2.0f * (gfloat) pad->ypos / (gfloat) out_height - 1.0f;
/* top-right */
v_vertices[5] = v_vertices[10] = v_vertices[0] + 2.0f * w;
/* bottom-right */
v_vertices[11] = v_vertices[16] = v_vertices[1] + 2.0f * h;
GST_TRACE ("processing texture:%u dimensions:%ux%u, at %f,%f %fx%f", in_tex,
in_width, in_height, v_vertices[0], v_vertices[1], v_vertices[5],