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alpha: Rename and move functions as further preparation for supporting more color formats

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This commit is contained in:
Sebastian Dröge 2010-03-19 18:21:19 +01:00
parent 46025bbd8f
commit 00b3eb1dfc
1 changed files with 83 additions and 83 deletions
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166
gst/alpha/gstalpha.c
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@ -449,79 +449,6 @@ gst_alpha_set_caps (GstBaseTransform * btrans,
return TRUE; return TRUE;
} }
static void
gst_alpha_set_ayuv (const guint8 * src, guint8 * dest, gint width, gint height,
GstAlpha * alpha)
{
gint s_alpha = CLAMP ((gint) (alpha->alpha * 256), 0, 256);
gint y, x;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
*dest++ = (*src++ * s_alpha) >> 8;
*dest++ = *src++;
*dest++ = *src++;
*dest++ = *src++;
}
}
}
static void
gst_alpha_set_i420 (const guint8 * src, guint8 * dest, gint width, gint height,
GstAlpha * alpha)
{
gint b_alpha = CLAMP ((gint) (alpha->alpha * 255), 0, 255);
const guint8 *srcY;
const guint8 *srcU;
const guint8 *srcV;
gint i, j;
gint src_wrap, src_uv_wrap;
gint y_stride, uv_stride;
gboolean odd_width;
y_stride = gst_video_format_get_row_stride (GST_VIDEO_FORMAT_I420, 0, width);
uv_stride = gst_video_format_get_row_stride (GST_VIDEO_FORMAT_I420, 1, width);
src_wrap = y_stride - width;
src_uv_wrap = uv_stride - (width / 2);
srcY = src;
srcU = src + gst_video_format_get_component_offset (GST_VIDEO_FORMAT_I420,
1, width, height);
srcV = src + gst_video_format_get_component_offset (GST_VIDEO_FORMAT_I420,
2, width, height);
odd_width = (width % 2 != 0);
for (i = 0; i < height; i++) {
for (j = 0; j < width / 2; j++) {
*dest++ = b_alpha;
*dest++ = *srcY++;
*dest++ = *srcU;
*dest++ = *srcV;
*dest++ = b_alpha;
*dest++ = *srcY++;
*dest++ = *srcU++;
*dest++ = *srcV++;
}
/* Might have one odd column left to do */
if (odd_width) {
*dest++ = b_alpha;
*dest++ = *srcY++;
*dest++ = *srcU;
*dest++ = *srcV;
}
if (i % 2 == 0) {
srcU -= width / 2;
srcV -= width / 2;
} else {
srcU += src_uv_wrap;
srcV += src_uv_wrap;
}
srcY += src_wrap;
}
}
/* based on http://www.cs.utah.edu/~michael/chroma/ /* based on http://www.cs.utah.edu/~michael/chroma/
*/ */
static inline gint static inline gint
@ -603,7 +530,80 @@ chroma_keying_yuv (gint a, gint * y, guint ny, gint * u,
} }
static void static void
gst_alpha_chroma_key_ayuv (const guint8 * src, guint8 * dest, gint width, gst_alpha_set_ayuv_ayuv (const guint8 * src, guint8 * dest, gint width,
gint height, GstAlpha * alpha)
{
gint s_alpha = CLAMP ((gint) (alpha->alpha * 256), 0, 256);
gint y, x;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
*dest++ = (*src++ * s_alpha) >> 8;
*dest++ = *src++;
*dest++ = *src++;
*dest++ = *src++;
}
}
}
static void
gst_alpha_set_i420_ayuv (const guint8 * src, guint8 * dest, gint width,
gint height, GstAlpha * alpha)
{
gint b_alpha = CLAMP ((gint) (alpha->alpha * 255), 0, 255);
const guint8 *srcY;
const guint8 *srcU;
const guint8 *srcV;
gint i, j;
gint src_wrap, src_uv_wrap;
gint y_stride, uv_stride;
gboolean odd_width;
y_stride = gst_video_format_get_row_stride (GST_VIDEO_FORMAT_I420, 0, width);
uv_stride = gst_video_format_get_row_stride (GST_VIDEO_FORMAT_I420, 1, width);
src_wrap = y_stride - width;
src_uv_wrap = uv_stride - (width / 2);
srcY = src;
srcU = src + gst_video_format_get_component_offset (GST_VIDEO_FORMAT_I420,
1, width, height);
srcV = src + gst_video_format_get_component_offset (GST_VIDEO_FORMAT_I420,
2, width, height);
odd_width = (width % 2 != 0);
for (i = 0; i < height; i++) {
for (j = 0; j < width / 2; j++) {
*dest++ = b_alpha;
*dest++ = *srcY++;
*dest++ = *srcU;
*dest++ = *srcV;
*dest++ = b_alpha;
*dest++ = *srcY++;
*dest++ = *srcU++;
*dest++ = *srcV++;
}
/* Might have one odd column left to do */
if (odd_width) {
*dest++ = b_alpha;
*dest++ = *srcY++;
*dest++ = *srcU;
*dest++ = *srcV;
}
if (i % 2 == 0) {
srcU -= width / 2;
srcV -= width / 2;
} else {
srcU += src_uv_wrap;
srcV += src_uv_wrap;
}
srcY += src_wrap;
}
}
static void
gst_alpha_chroma_key_ayuv_ayuv (const guint8 * src, guint8 * dest, gint width,
gint height, GstAlpha * alpha) gint height, GstAlpha * alpha)
{ {
const guint8 *src1; const guint8 *src1;
@ -643,9 +643,9 @@ gst_alpha_chroma_key_ayuv (const guint8 * src, guint8 * dest, gint width,
} }
static inline void static inline void
gst_alpha_chromakey_row_i420 (GstAlpha * alpha, guint8 * dest1, guint8 * dest2, gst_alpha_chromakey_row_i420_ayuv (GstAlpha * alpha, guint8 * dest1,
const guint8 * srcY1, const guint8 * srcY2, const guint8 * srcU, guint8 * dest2, const guint8 * srcY1, const guint8 * srcY2,
const guint8 * srcV, gint width) const guint8 * srcU, const guint8 * srcV, gint width)
{ {
gint xpos; gint xpos;
gint a, a2, y[4], u, v; gint a, a2, y[4], u, v;
@ -691,7 +691,7 @@ gst_alpha_chromakey_row_i420 (GstAlpha * alpha, guint8 * dest1, guint8 * dest2,
} }
static void static void
gst_alpha_chroma_key_i420 (const guint8 * src, guint8 * dest, gint width, gst_alpha_chroma_key_i420_ayuv (const guint8 * src, guint8 * dest, gint width,
gint height, GstAlpha * alpha) gint height, GstAlpha * alpha)
{ {
const guint8 *srcY1, *srcY2, *srcU, *srcV; const guint8 *srcY1, *srcY2, *srcU, *srcV;
@ -722,7 +722,7 @@ gst_alpha_chroma_key_i420 (const guint8 * src, guint8 * dest, gint width,
src_y_stride *= 2; src_y_stride *= 2;
for (ypos = 0; ypos < height / 2; ypos++) { for (ypos = 0; ypos < height / 2; ypos++) {
gst_alpha_chromakey_row_i420 (alpha, dest1, dest2, gst_alpha_chromakey_row_i420_ayuv (alpha, dest1, dest2,
srcY1, srcY2, srcU, srcV, width); srcY1, srcY2, srcU, srcV, width);
dest1 += dest_stride; dest1 += dest_stride;
@ -792,10 +792,10 @@ gst_alpha_set_process_function (GstAlpha * alpha)
case GST_VIDEO_FORMAT_AYUV: case GST_VIDEO_FORMAT_AYUV:
switch (alpha->in_format) { switch (alpha->in_format) {
case GST_VIDEO_FORMAT_AYUV: case GST_VIDEO_FORMAT_AYUV:
alpha->process = gst_alpha_set_ayuv; alpha->process = gst_alpha_set_ayuv_ayuv;
break; break;
case GST_VIDEO_FORMAT_I420: case GST_VIDEO_FORMAT_I420:
alpha->process = gst_alpha_set_i420; alpha->process = gst_alpha_set_i420_ayuv;
break; break;
default: default:
break; break;
@ -811,10 +811,10 @@ gst_alpha_set_process_function (GstAlpha * alpha)
case GST_VIDEO_FORMAT_AYUV: case GST_VIDEO_FORMAT_AYUV:
switch (alpha->in_format) { switch (alpha->in_format) {
case GST_VIDEO_FORMAT_AYUV: case GST_VIDEO_FORMAT_AYUV:
alpha->process = gst_alpha_chroma_key_ayuv; alpha->process = gst_alpha_chroma_key_ayuv_ayuv;
break; break;
case GST_VIDEO_FORMAT_I420: case GST_VIDEO_FORMAT_I420:
alpha->process = gst_alpha_chroma_key_i420; alpha->process = gst_alpha_chroma_key_i420_ayuv;
break; break;
default: default:
break; break;