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videomixer: Add support for ARGB

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And clean up the caps parsing.
This commit is contained in:
Sebastian Dröge 2009-07-08 18:17:48 +02:00
parent abd383a2a6
commit 69f9b7c8d6
3 changed files with 155 additions and 142 deletions
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4
gst/videomixer/Makefile.am
View file

@ -1,8 +1,8 @@
plugin_LTLIBRARIES = libgstvideomixer.la
libgstvideomixer_la_SOURCES = videomixer.c blend_ayuv.c blend_bgra.c blend_i420.c
libgstvideomixer_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) $(GST_CONTROLLER_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS)
libgstvideomixer_la_LIBADD = $(GST_LIBS) $(GST_BASE_LIBS) $(GST_CONTROLLER_LIBS)
libgstvideomixer_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) $(GST_CONTROLLER_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS)
libgstvideomixer_la_LIBADD = $(GST_LIBS) $(GST_BASE_LIBS) $(GST_CONTROLLER_LIBS) $(GST_PLUGINS_BASE_CFLAGS) -lgstvideo-@GST_MAJORMINOR@
libgstvideomixer_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
libgstvideomixer_la_LIBTOOLFLAGS = --tag=disable-static

202
gst/videomixer/blend_bgra.c
View file

@ -26,109 +26,115 @@
#define BLEND_MODE BLEND_NORMAL
void
gst_videomixer_blend_bgra_bgra (guint8 * src, gint xpos, gint ypos,
gint src_width, gint src_height, gdouble src_alpha,
guint8 * dest, gint dest_width, gint dest_height)
{
gint alpha, b_alpha;
gint i, j;
gint src_stride, dest_stride;
gint src_add, dest_add;
gint B, G, R;
src_stride = src_width * 4;
dest_stride = dest_width * 4;
b_alpha = (gint) (src_alpha * 255);
/* adjust src pointers for negative sizes */
if (xpos < 0) {
src += -xpos * 4;
src_width -= -xpos;
xpos = 0;
}
if (ypos < 0) {
src += -ypos * src_stride;
src_height -= -ypos;
ypos = 0;
}
/* adjust width/height if the src is bigger than dest */
if (xpos + src_width > dest_width) {
src_width = dest_width - xpos;
}
if (ypos + src_height > dest_height) {
src_height = dest_height - ypos;
}
src_add = src_stride - (4 * src_width);
dest_add = dest_stride - (4 * src_width);
dest = dest + 4 * xpos + (ypos * dest_stride);
/* we convert a square of 2x2 samples to generate 4 Luma and 2 chroma samples */
for (i = 0; i < src_height; i++) {
for (j = 0; j < src_width; j++) {
alpha = (src[3] * b_alpha) >> 8;
BLEND_MODE (dest[0], dest[1], dest[2], src[0], src[1], src[2],
B, G, R, alpha);
dest[0] = B;
dest[1] = G;
dest[2] = R;
dest[3] = 0xff;
src += 4;
dest += 4;
}
src += src_add;
dest += dest_add;
}
#define CREATE_FUNCTIONS(name, a, r, g, b) \
void \
gst_videomixer_blend_##name##_##name (guint8 * src, gint xpos, gint ypos, \
gint src_width, gint src_height, gdouble src_alpha, \
guint8 * dest, gint dest_width, gint dest_height) \
{ \
gint alpha, b_alpha; \
gint i, j; \
gint src_stride, dest_stride; \
gint src_add, dest_add; \
gint B, G, R; \
\
src_stride = src_width * 4; \
dest_stride = dest_width * 4; \
\
b_alpha = (gint) (src_alpha * 255); \
\
/* adjust src pointers for negative sizes */ \
if (xpos < 0) { \
src += -xpos * 4; \
src_width -= -xpos; \
xpos = 0; \
} \
if (ypos < 0) { \
src += -ypos * src_stride; \
src_height -= -ypos; \
ypos = 0; \
} \
/* adjust width/height if the src is bigger than dest */ \
if (xpos + src_width > dest_width) { \
src_width = dest_width - xpos; \
} \
if (ypos + src_height > dest_height) { \
src_height = dest_height - ypos; \
} \
\
src_add = src_stride - (4 * src_width); \
dest_add = dest_stride - (4 * src_width); \
\
dest = dest + 4 * xpos + (ypos * dest_stride); \
\
/* we convert a square of 2x2 samples to generate 4 Luma and 2 chroma samples */ \
for (i = 0; i < src_height; i++) { \
for (j = 0; j < src_width; j++) { \
alpha = (src[a] * b_alpha) >> 8; \
BLEND_MODE (dest[b], dest[g], dest[r], src[b], src[g], src[r], \
B, G, R, alpha); \
dest[b] = B; \
dest[g] = G; \
dest[r] = R; \
dest[a] = 0xff; \
\
src += 4; \
dest += 4; \
} \
src += src_add; \
dest += dest_add; \
} \
} \
\
/* fill a buffer with a checkerboard pattern */ \
void \
gst_videomixer_fill_##name##_checker (guint8 * dest, gint width, gint height) \
{ \
gint i, j; \
static const int tab[] = { 80, 160, 80, 160 }; \
\
for (i = 0; i < height; i++) { \
for (j = 0; j < width; j++) { \
dest[b] = tab[((i & 0x8) >> 3) + ((j & 0x8) >> 3)]; /* blue */ \
dest[g] = tab[((i & 0x8) >> 3) + ((j & 0x8) >> 3)]; /* green */ \
dest[r] = tab[((i & 0x8) >> 3) + ((j & 0x8) >> 3)]; /* red */ \
dest[a] = 0xFF; /* alpha */ \
dest += 4; \
} \
} \
} \
\
void \
gst_videomixer_fill_##name##_color (guint8 * dest, gint width, gint height, \
gint colY, gint colU, gint colV) \
{ \
gint red, green, blue; \
gint i, j; \
\
red = CLAMP (1.164 * (colY - 16) + 1.596 * (colV - 128), 0, 255); \
green = \
CLAMP (1.164 * (colY - 16) - 0.813 * (colV - 128) - 0.391 * (colU - 128), \
0, 255); \
blue = CLAMP (1.164 * (colY - 16) + 2.018 * (colU - 128), 0, 255); \
\
for (i = 0; i < height; i++) { \
for (j = 0; j < width; j++) { \
dest[b] = blue; \
dest[g] = green; \
dest[r] = red; \
dest[a] = 0xff; \
dest += 4; \
} \
} \
}
#undef BLEND_MODE
/* fill a buffer with a checkerboard pattern */
void
gst_videomixer_fill_bgra_checker (guint8 * dest, gint width, gint height)
{
gint i, j;
static int tab[] = { 80, 160, 80, 160 };
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
*dest++ = tab[((i & 0x8) >> 3) + ((j & 0x8) >> 3)]; /* blue */
*dest++ = tab[((i & 0x8) >> 3) + ((j & 0x8) >> 3)]; /* green */
*dest++ = tab[((i & 0x8) >> 3) + ((j & 0x8) >> 3)]; /* red */
*dest++ = 0xFF; /* alpha */
}
}
}
void
gst_videomixer_fill_bgra_color (guint8 * dest, gint width, gint height,
gint colY, gint colU, gint colV)
{
gint red, green, blue;
gint i, j;
red = CLAMP (1.164 * (colY - 16) + 1.596 * (colV - 128), 0, 255);
green =
CLAMP (1.164 * (colY - 16) - 0.813 * (colV - 128) - 0.391 * (colU - 128),
0, 255);
blue = CLAMP (1.164 * (colY - 16) + 2.018 * (colU - 128), 0, 255);
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
*dest++ = blue;
*dest++ = green;
*dest++ = red;
*dest++ = 0xff;
}
}
}
CREATE_FUNCTIONS (argb, 0, 1, 2, 3);
CREATE_FUNCTIONS (bgra, 3, 2, 1, 0);
size_t
gst_videomixer_calculate_frame_size_bgra (gint width, gint height)
{
return GST_ROUND_UP_4 (width) * height * 4;
}
#undef BLEND_MODE

91
gst/videomixer/videomixer.c
View file

@ -20,12 +20,12 @@
/**
* SECTION:element-videomixer
*
* Videomixer can accept AYUV and BGRA video streams. For each of the requested
* Videomixer can accept AYUV, ARGB and BGRA video streams. For each of the requested
* sink pads it will compare the incoming geometry and framerate to define the
* output parameters. Indeed output video frames will have the geometry of the
* biggest incoming video stream and the framerate of the fastest incoming one.
*
* All sink pads must be either AYUV or BGRA, but a mixture of them is not
* All sink pads must be either AYUV, ARGB or BGRA, but a mixture of them is not
* supported. The src pad will have the same colorspace as the sinks.
* No colorspace conversion is done.
*
@ -105,13 +105,19 @@ void gst_videomixer_fill_ayuv_checker (guint8 * dest, gint width, gint height);
void gst_videomixer_fill_ayuv_color (guint8 * dest, gint width, gint height,
gint colY, gint colU, gint colV);
size_t gst_videomixer_calculate_frame_size_ayuv (gint width, gint height);
/*BGRA function definitions see file: blend_ayuv*/
/*BGRA/ARGB function definitions see file: blend_bgra*/
void gst_videomixer_blend_bgra_bgra (guint8 * src, gint xpos, gint ypos,
gint src_width, gint src_height, gdouble src_alpha,
guint8 * dest, gint dest_width, gint dest_height);
void gst_videomixer_fill_bgra_checker (guint8 * dest, gint width, gint height);
void gst_videomixer_fill_bgra_color (guint8 * dest, gint width, gint height,
gint colY, gint colU, gint colV);
void gst_videomixer_blend_argb_argb (guint8 * src, gint xpos, gint ypos,
gint src_width, gint src_height, gdouble src_alpha,
guint8 * dest, gint dest_width, gint dest_height);
void gst_videomixer_fill_argb_checker (guint8 * dest, gint width, gint height);
void gst_videomixer_fill_argb_color (guint8 * dest, gint width, gint height,
gint colY, gint colU, gint colV);
size_t gst_videomixer_calculate_frame_size_bgra (gint width, gint height);
/*I420 function definitions see file: blend_i420.c*/
void gst_videomixer_blend_i420_i420 (guint8 * src, gint xpos, gint ypos,
@ -462,14 +468,14 @@ static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV") ";" GST_VIDEO_CAPS_BGRA ";"
GST_VIDEO_CAPS_YUV ("I420"))
GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_YUV ("I420"))
);
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV") ";" GST_VIDEO_CAPS_BGRA ";"
GST_VIDEO_CAPS_YUV ("I420"))
GST_VIDEO_CAPS_ARGB ";" GST_VIDEO_CAPS_YUV ("I420"))
);
static void gst_videomixer_finalize (GObject * object);
@ -914,56 +920,57 @@ gst_videomixer_getcaps (GstPad * pad)
static gboolean
gst_videomixer_setcaps (GstPad * pad, GstCaps * caps)
{
GstElement *element;
GstVideoMixer *mixer;
GstStructure *str;
element = gst_pad_get_parent_element (pad);
g_assert (element);
mixer = GST_VIDEO_MIXER (element);
g_assert (mixer);
GstVideoMixer *mixer = GST_VIDEO_MIXER (gst_pad_get_parent_element (pad));
GstVideoFormat fmt;
gboolean ret = FALSE;
GST_INFO_OBJECT (mixer, "set src caps: \n%" GST_PTR_FORMAT, caps);
str = gst_caps_get_structure (caps, 0);
mixer->blend = NULL;
mixer->fill_checker = NULL;
mixer->fill_color = NULL;
mixer->calculate_frame_size = NULL;
if (gst_structure_has_name (str, "video/x-raw-yuv")) {
guint32 format;
int ret;
ret = gst_structure_get_fourcc (str, "format", &format);
if (!ret) {
mixer->blend = NULL;
mixer->fill_checker = NULL;
mixer->fill_color = NULL;
mixer->calculate_frame_size = NULL;
} else if (format == GST_STR_FOURCC ("AYUV")) {
if (!gst_video_format_parse_caps (caps, &fmt, NULL, NULL))
goto done;
switch (fmt) {
case GST_VIDEO_FORMAT_AYUV:
mixer->blend = gst_videomixer_blend_ayuv_ayuv;
mixer->fill_checker = gst_videomixer_fill_ayuv_checker;
mixer->fill_color = gst_videomixer_fill_ayuv_color;
mixer->calculate_frame_size = gst_videomixer_calculate_frame_size_ayuv;
} else if (format == GST_STR_FOURCC ("I420")) {
ret = TRUE;
break;
case GST_VIDEO_FORMAT_I420:
mixer->blend = gst_videomixer_blend_i420_i420;
mixer->fill_checker = gst_videomixer_fill_i420_checker;
mixer->fill_color = gst_videomixer_fill_i420_color;
mixer->calculate_frame_size = gst_videomixer_calculate_frame_size_i420;
} else {
mixer->blend = NULL;
mixer->fill_checker = NULL;
mixer->fill_color = NULL;
mixer->calculate_frame_size = NULL;
}
} else if (gst_structure_has_name (str, "video/x-raw-rgb")) {
mixer->blend = gst_videomixer_blend_bgra_bgra;
mixer->fill_checker = gst_videomixer_fill_bgra_checker;
mixer->fill_color = gst_videomixer_fill_bgra_color;
mixer->calculate_frame_size = gst_videomixer_calculate_frame_size_bgra;
} else {
mixer->blend = NULL;
mixer->fill_checker = NULL;
mixer->fill_color = NULL;
mixer->calculate_frame_size = NULL;
ret = TRUE;
break;
case GST_VIDEO_FORMAT_BGRA:
mixer->blend = gst_videomixer_blend_bgra_bgra;
mixer->fill_checker = gst_videomixer_fill_bgra_checker;
mixer->fill_color = gst_videomixer_fill_bgra_color;
mixer->calculate_frame_size = gst_videomixer_calculate_frame_size_bgra;
ret = TRUE;
break;
case GST_VIDEO_FORMAT_ARGB:
mixer->blend = gst_videomixer_blend_argb_argb;
mixer->fill_checker = gst_videomixer_fill_argb_checker;
mixer->fill_color = gst_videomixer_fill_argb_color;
mixer->calculate_frame_size = gst_videomixer_calculate_frame_size_bgra;
ret = TRUE;
break;
default:
break;
}
gst_object_unref (element);
return TRUE;
done:
gst_object_unref (mixer);
return ret;
}
static GstPad *