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gst/videomixer/videomixer.c: Only mix AYUV for maximum quality.

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Original commit message from CVS:
* gst/videomixer/videomixer.c: (gst_videomixer_blend_ayuv_ayuv),
(gst_videomixer_fill_checker), (gst_videomixer_fill_color),
(gst_videomixer_blend_buffers), (gst_videomixer_loop):
Only mix AYUV for maximum quality.
This commit is contained in:
Wim Taymans 2004-11-08 17:22:05 +00:00
parent 92eed86f00
commit 151f5ac2c4
2 changed files with 45 additions and 81 deletions
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7
ChangeLog
View file

@ -1,3 +1,10 @@
2004-11-08 Wim Taymans <wim@fluendo.com>
* gst/videomixer/videomixer.c: (gst_videomixer_blend_ayuv_ayuv),
(gst_videomixer_fill_checker), (gst_videomixer_fill_color),
(gst_videomixer_blend_buffers), (gst_videomixer_loop):
Only mix AYUV for maximum quality.
2004-11-08 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* ext/ogg/gstoggdemux.c: (get_relative), (gst_ogg_demux_src_query),

119
gst/videomixer/videomixer.c
View file

@ -380,7 +380,7 @@ static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw-yuv,"
"format = (fourcc) I420,"
"format = (fourcc) AYUV,"
"width = (int) [ 16, 4096 ],"
"height = (int) [ 16, 4096 ]," "framerate = (double) [ 0, max ]")
);
@ -753,28 +753,18 @@ gst_videomixer_handle_src_event (GstPad * pad, GstEvent * event)
/* note that this function does packing conversion and blending at the
* same time */
static void
gst_videomixer_blend_ayuv_i420 (guint8 * src, gint xpos, gint ypos,
gst_videomixer_blend_ayuv_ayuv (guint8 * src, gint xpos, gint ypos,
gint src_width, gint src_height, gdouble src_alpha,
guint8 * dest, gint dest_width, gint dest_height)
{
gint dest_size, dest_size2;
gint alpha, b_alpha;
guint8 *destY1, *destY2, *destU, *destV;
gint accumU;
gint accumV;
gint i, j;
gint src_stride;
gint src_add, destY_add, destC_add;
guint8 *src1, *src2;
gint src_stride, dest_stride;
gint src_add, dest_add;
gint Y, U, V;
gint dest_stride, dest_stride2;
src_stride = ROUND_UP_2 (src_width) * 4;
dest_stride = ROUND_UP_4 (dest_width);
dest_size = dest_stride * ROUND_UP_2 (dest_height);
dest_stride2 = ROUND_UP_8 (dest_width) / 2;
dest_size2 = dest_stride2 * ROUND_UP_2 (dest_height) / 2;
dest_stride = ROUND_UP_2 (dest_width) * 4;
b_alpha = (gint) (src_alpha * 255);
@ -797,63 +787,27 @@ gst_videomixer_blend_ayuv_i420 (guint8 * src, gint xpos, gint ypos,
src_height = dest_height - ypos;
}
src_add = 2 * src_stride - (8 * ROUND_UP_2 (src_width) / 2);
destY_add = 2 * dest_stride - (2 * (ROUND_UP_2 (src_width) / 2));
destC_add = dest_stride2 - (ROUND_UP_2 (src_width) / 2);
src_add = src_stride - (4 * ROUND_UP_2 (src_width));
dest_add = dest_stride - (4 * ROUND_UP_2 (src_width));
destY1 = dest + xpos + (ypos * dest_stride);
destY2 = destY1 + dest_stride;
destU = dest + dest_size + (xpos / 2) + ((ypos / 2) * dest_stride2);
destV = destU + dest_size2;
src1 = src;
src2 = src + src_stride;
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 < ROUND_UP_2 (src_height) / 2; i++) {
for (j = 0; j < ROUND_UP_2 (src_width) / 2; j++) {
alpha = (src1[0] * b_alpha) >> 8;
BLEND_MODE (destY1[0], destU[0], destV[0], src1[1], src1[2], src1[3],
for (i = 0; i < ROUND_UP_2 (src_height); i++) {
for (j = 0; j < ROUND_UP_2 (src_width); j++) {
alpha = (src[0] * b_alpha) >> 8;
BLEND_MODE (dest[1], dest[2], dest[3], src[1], src[2], src[3],
alpha, Y, U, V);
destY1[0] = Y;
accumU = U;
accumV = V;
alpha = (src1[4] * b_alpha) >> 8;
BLEND_MODE (destY1[1], destU[0], destV[0], src1[5], src1[6], src1[7],
alpha, Y, U, V);
destY1[1] = Y;
accumU += U;
accumV += V;
alpha = (src2[0] * b_alpha) >> 8;
BLEND_MODE (destY2[0], destU[0], destV[0], src2[1], src2[2], src2[3],
alpha, Y, U, V);
destY2[0] = Y;
accumU += U;
accumV += V;
alpha = (src2[4] * b_alpha) >> 8;
BLEND_MODE (destY2[1], destU[0], destV[0], src2[5], src2[6], src2[7],
alpha, Y, U, V);
destY2[1] = Y;
accumU += U;
accumV += V;
dest[0] = 0xff;
dest[1] = Y;
dest[2] = U;
dest[3] = V;
/* take the average of the 4 chroma samples to get the final value */
destU[0] = (accumU + 2) >> 2;
destV[0] = (accumV + 2) >> 2;
src1 += 8;
src2 += 8;
destY1 += 2;
destY2 += 2;
destU += 1;
destV += 1;
src += 4;
dest += 4;
}
src1 += src_add;
src2 += src_add;
destY1 += destY_add;
destY2 += destY_add;
destU += destC_add;
destV += destC_add;
src += src_add;
dest += dest_add;
}
}
@ -877,35 +831,39 @@ gst_videomixer_sort_pads (GstVideoMixer * mix)
static void
gst_videomixer_fill_checker (guint8 * dest, gint width, gint height)
{
gint size, size2;
gint stride;
gint i, j;
static int tab[] = { 80, 160, 80, 160 };
stride = ROUND_UP_4 (width);
size = stride * height;
size2 = ROUND_UP_4 ((width + 1) >> 1) * ((height + 1) >> 1);
stride = ROUND_UP_2 (width);
for (i = 0; i < height; i++) {
for (j = 0; j < stride; j++) {
*dest++ = 0xff;
*dest++ = tab[((i & 0x8) >> 3) + ((j & 0x8) >> 3)];
*dest++ = 128;
*dest++ = 128;
}
}
memset (dest, 128, 2 * size2);
}
static void
gst_videomixer_fill_color (guint8 * dest, gint width, gint height,
gint colY, gint colU, gint colV)
{
gint size, size2;
gint stride;
gint i, j;
size = ROUND_UP_4 (width) * height;
size2 = ROUND_UP_4 ((width + 1) >> 1) * ((height + 1) >> 1);
stride = ROUND_UP_2 (width);
memset (dest, colY, size);
memset (dest + size, colU, size2);
memset (dest + size + size2, colV, size2);
for (i = 0; i < height; i++) {
for (j = 0; j < stride; j++) {
*dest++ = 0xff;
*dest++ = colY;
*dest++ = colU;
*dest++ = colV;
}
}
}
/* try to get a buffer on all pads. As long as the queued value is
@ -1003,7 +961,7 @@ gst_videomixer_blend_buffers (GstVideoMixer * mix, GstBuffer * outbuf)
walk = g_slist_next (walk);
if (pad->buffer != NULL) {
gst_videomixer_blend_ayuv_i420 (GST_BUFFER_DATA (pad->buffer),
gst_videomixer_blend_ayuv_ayuv (GST_BUFFER_DATA (pad->buffer),
pad->xpos, pad->ypos,
pad->in_width, pad->in_height,
pad->alpha,
@ -1085,7 +1043,7 @@ gst_videomixer_loop (GstElement * element)
newcaps =
gst_caps_copy (gst_pad_get_negotiated_caps (GST_PAD (mix->master)));
gst_caps_set_simple (newcaps, "format", GST_TYPE_FOURCC,
GST_STR_FOURCC ("I420"), "width", G_TYPE_INT, new_width, "height",
GST_STR_FOURCC ("AYUV"), "width", G_TYPE_INT, new_width, "height",
G_TYPE_INT, new_height, NULL);
if (GST_PAD_LINK_FAILED (gst_pad_try_set_caps (mix->srcpad, newcaps))) {
@ -1097,8 +1055,7 @@ gst_videomixer_loop (GstElement * element)
mix->out_height = new_height;
}
outsize = ROUND_UP_4 (mix->out_width) * ROUND_UP_2 (mix->out_height) +
2 * ROUND_UP_8 (mix->out_width) / 2 * ROUND_UP_2 (mix->out_height);
outsize = ROUND_UP_2 (mix->out_width) * ROUND_UP_2 (mix->out_height) * 4;
outbuf = gst_pad_alloc_buffer (mix->srcpad, GST_BUFFER_OFFSET_NONE, outsize);
switch (mix->background) {