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alphacolor: Add support for inplace conversions from AYUV to ARGB

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This commit is contained in:
Sebastian Dröge 2010-03-15 18:50:11 +01:00
parent 8cbb9608f9
commit c01cf035c1
2 changed files with 154 additions and 28 deletions
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180
gst/alpha/gstalphacolor.c
View file

@ -39,17 +39,18 @@ GST_DEBUG_CATEGORY_STATIC (alpha_color_debug);
#define GST_CAT_DEFAULT alpha_color_debug
/* elementfactory information */
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_BGRA)
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_BGRA ";"
GST_VIDEO_CAPS_YUV ("AYUV"))
);
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV"))
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBA ";" GST_VIDEO_CAPS_BGRA ";"
GST_VIDEO_CAPS_YUV ("AYUV"))
);
GST_BOILERPLATE (GstAlphaColor, gst_alpha_color, GstVideoFilter,
@ -69,7 +70,7 @@ gst_alpha_color_base_init (gpointer g_class)
gst_element_class_set_details_simple (element_class, "Alpha color filter",
"Filter/Effect/Video",
"RGBA to AYUV colorspace conversion preserving the alpha channel",
"ARGB from/to AYUV colorspace conversion preserving the alpha channel",
"Wim Taymans <wim@fluendo.com>");
gst_element_class_add_pad_template (element_class,
@ -92,7 +93,7 @@ gst_alpha_color_class_init (GstAlphaColorClass * klass)
GST_DEBUG_FUNCPTR (gst_alpha_color_transform_ip);
GST_DEBUG_CATEGORY_INIT (alpha_color_debug, "alphacolor", 0,
"RGB->YUV colorspace conversion preserving the alpha channels");
"ARGB<->AYUV colorspace conversion preserving the alpha channels");
}
static void
@ -111,17 +112,12 @@ gst_alpha_color_transform_caps (GstBaseTransform * btrans,
GstCaps *result = NULL, *local_caps = NULL;
guint i;
local_caps = gst_caps_copy (caps);
local_caps = gst_caps_new_empty ();
for (i = 0; i < gst_caps_get_size (local_caps); i++) {
GstStructure *structure = gst_caps_get_structure (local_caps, i);
for (i = 0; i < gst_caps_get_size (caps); i++) {
GstStructure *structure =
gst_structure_copy (gst_caps_get_structure (caps, i));
/* Throw away the structure name and set it to transformed format */
if (direction == GST_PAD_SINK) {
gst_structure_set_name (structure, "video/x-raw-yuv");
} else if (direction == GST_PAD_SRC) {
gst_structure_set_name (structure, "video/x-raw-rgb");
}
/* Remove any specific parameter from the structure */
gst_structure_remove_field (structure, "format");
gst_structure_remove_field (structure, "endianness");
@ -131,6 +127,11 @@ gst_alpha_color_transform_caps (GstBaseTransform * btrans,
gst_structure_remove_field (structure, "green_mask");
gst_structure_remove_field (structure, "blue_mask");
gst_structure_remove_field (structure, "alpha_mask");
gst_structure_set_name (structure, "video/x-raw-yuv");
gst_caps_append_structure (local_caps, gst_structure_copy (structure));
gst_structure_set_name (structure, "video/x-raw-rgb");
gst_caps_append_structure (local_caps, structure);
}
/* Get the appropriate template */
@ -159,25 +160,30 @@ gst_alpha_color_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
GstAlphaColor *alpha = GST_ALPHA_COLOR (btrans);
gboolean ret;
gint w, h;
GstVideoFormat format;
gint w2, h2;
GstVideoFormat in_format, out_format;
ret = gst_video_format_parse_caps (outcaps, &format, &w, &h);
ret = gst_video_format_parse_caps (incaps, &in_format, &w, &h);
ret &= gst_video_format_parse_caps (outcaps, &out_format, &w2, &h2);
if (!ret || (format != GST_VIDEO_FORMAT_ARGB
&& format != GST_VIDEO_FORMAT_BGRA)) {
GST_DEBUG_OBJECT (alpha, "incomplete or non-RGBA input caps!");
if (!ret || w != w2 || h != h2) {
GST_DEBUG_OBJECT (alpha, "incomplete or invalid caps!");
return FALSE;
}
alpha->format = format;
alpha->in_format = in_format;
alpha->out_format = out_format;
alpha->width = w;
alpha->height = h;
if (in_format == out_format)
gst_base_transform_set_passthrough (btrans, TRUE);
return TRUE;
}
static void
transform_rgb (guint8 * data, gint size)
transform_argb_ayuv (guint8 * data, gint size)
{
guint8 y, u, v;
@ -197,7 +203,7 @@ transform_rgb (guint8 * data, gint size)
}
static void
transform_bgr (guint8 * data, gint size)
transform_bgra_ayuv (guint8 * data, gint size)
{
guint8 y, u, v;
@ -216,17 +222,137 @@ transform_bgr (guint8 * data, gint size)
}
}
static void
transform_argb_bgra (guint8 * data, gint size)
{
guint8 a, r, g;
while (size > 0) {
a = data[0];
r = data[1];
g = data[2];
data[0] = data[3];
data[1] = g;
data[2] = r;
data[3] = a;
data += 4;
size -= 4;
}
}
static void
transform_ayuv_argb (guint8 * data, gint size)
{
guint8 r, g, b;
while (size > 0) {
r = data[1] + (0.419 / 0.299) * (data[3] - 128);
g = data[1] + (-0.114 / 0.331) * (data[2] - 128) +
(-0.299 / 0.419) * (data[3] - 128);
b = data[1] + (0.587 / 0.331) * (data[2] - 128);
data[0] = data[0];
data[1] = r;
data[2] = g;
data[3] = b;
data += 4;
size -= 4;
}
}
static void
transform_ayuv_bgra (guint8 * data, gint size)
{
guint8 r, g, b;
while (size > 0) {
r = data[1] + (0.419 / 0.299) * (data[3] - 128);
g = data[1] + (-0.114 / 0.331) * (data[2] - 128) +
(-0.299 / 0.419) * (data[3] - 128);
b = data[1] + (0.587 / 0.331) * (data[2] - 128);
data[3] = data[0];
data[2] = r;
data[1] = g;
data[0] = b;
data += 4;
size -= 4;
}
}
static GstFlowReturn
gst_alpha_color_transform_ip (GstBaseTransform * btrans, GstBuffer * inbuf)
{
GstFlowReturn ret = GST_FLOW_OK;
GstAlphaColor *alpha = GST_ALPHA_COLOR (btrans);
if (G_UNLIKELY (GST_BUFFER_SIZE (inbuf) != 4 * alpha->width * alpha->height)) {
GST_ERROR_OBJECT (alpha, "Invalid buffer size (was %u, expected %u)",
GST_BUFFER_SIZE (inbuf), alpha->width * alpha->height);
return GST_FLOW_ERROR;
}
/* Transform in place */
if (alpha->format == GST_VIDEO_FORMAT_ARGB)
transform_rgb (GST_BUFFER_DATA (inbuf), GST_BUFFER_SIZE (inbuf));
else
transform_bgr (GST_BUFFER_DATA (inbuf), GST_BUFFER_SIZE (inbuf));
switch (alpha->in_format) {
case GST_VIDEO_FORMAT_ARGB:
switch (alpha->out_format) {
case GST_VIDEO_FORMAT_ARGB:
break;
case GST_VIDEO_FORMAT_BGRA:
transform_argb_bgra (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
case GST_VIDEO_FORMAT_AYUV:
transform_argb_ayuv (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
default:
g_assert_not_reached ();
break;
}
break;
case GST_VIDEO_FORMAT_BGRA:
switch (alpha->out_format) {
case GST_VIDEO_FORMAT_BGRA:
break;
case GST_VIDEO_FORMAT_ARGB:
transform_argb_bgra (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
case GST_VIDEO_FORMAT_AYUV:
transform_bgra_ayuv (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
default:
g_assert_not_reached ();
break;
}
break;
case GST_VIDEO_FORMAT_AYUV:
switch (alpha->out_format) {
case GST_VIDEO_FORMAT_AYUV:
break;
case GST_VIDEO_FORMAT_ARGB:
transform_ayuv_argb (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
case GST_VIDEO_FORMAT_BGRA:
transform_ayuv_bgra (GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
break;
default:
g_assert_not_reached ();
break;
}
break;
default:
g_assert_not_reached ();
break;
}
return ret;
}
@ -241,5 +367,5 @@ plugin_init (GstPlugin * plugin)
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"alphacolor",
"RGBA to AYUV colorspace conversion preserving the alpha channel",
"RGBA from/to AYUV colorspace conversion preserving the alpha channel",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)

2
gst/alpha/gstalphacolor.h
View file

@ -43,7 +43,7 @@ struct _GstAlphaColor
/*< private >*/
/* caps */
GstVideoFormat format;
GstVideoFormat in_format, out_format;
gint width, height;
};