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Add conversions to and from RGBA32 and BGRA32.

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Originally committed as revision 824 to svn://svn.ffmpeg.org/ffmpeg/trunk
pull/126/head
Philip Gladstone 23 years ago
parent 64e105e051
commit b71472eb62
3 changed files with 258 additions and 1 deletions
Split View
  1. 2
      libavcodec/avcodec.h
  2. 242
      libavcodec/imgconvert.c
  3. 15
      libavcodec/utils.c

2
libavcodec/avcodec.h
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@ -59,6 +59,8 @@ enum PixelFormat {
PIX_FMT_BGR24,
PIX_FMT_YUV422P,
PIX_FMT_YUV444P,
PIX_FMT_RGBA32,
PIX_FMT_BGRA32,
PIX_FMT_YUV410P
};

242
libavcodec/imgconvert.c
Unescape View File

@ -117,6 +117,69 @@ static void rgb24_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,
}
}
static void rgba32_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,
UINT8 *src, int width, int height)
{
int wrap, wrap4, x, y;
int r, g, b, r1, g1, b1;
UINT8 *p;
wrap = width;
wrap4 = width * 4;
p = src;
for(y=0;y<height;y+=2) {
for(x=0;x<width;x+=2) {
r = p[0];
g = p[1];
b = p[2];
r1 = r;
g1 = g;
b1 = b;
lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
r = p[4];
g = p[5];
b = p[6];
r1 += r;
g1 += g;
b1 += b;
lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
p += wrap4;
lum += wrap;
r = p[0];
g = p[1];
b = p[2];
r1 += r;
g1 += g;
b1 += b;
lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
r = p[4];
g = p[5];
b = p[6];
r1 += r;
g1 += g;
b1 += b;
lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
cb[0] = ((- FIX(0.16874) * r1 - FIX(0.33126) * g1 +
FIX(0.50000) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
cr[0] = ((FIX(0.50000) * r1 - FIX(0.41869) * g1 -
FIX(0.08131) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
cb++;
cr++;
p += -wrap4 + 2 * 4;
lum += -wrap + 2;
}
p += wrap4;
lum += wrap;
}
}
static void bgr24_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,
UINT8 *src, int width, int height)
{
@ -180,6 +243,69 @@ static void bgr24_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,
}
}
static void bgra32_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,
UINT8 *src, int width, int height)
{
int wrap, wrap4, x, y;
int r, g, b, r1, g1, b1;
UINT8 *p;
wrap = width;
wrap4 = width * 4;
p = src;
for(y=0;y<height;y+=2) {
for(x=0;x<width;x+=2) {
b = p[0];
g = p[1];
r = p[2];
r1 = r;
g1 = g;
b1 = b;
lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
b = p[4];
g = p[5];
r = p[6];
r1 += r;
g1 += g;
b1 += b;
lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
p += wrap4;
lum += wrap;
b = p[0];
g = p[1];
r = p[2];
r1 += r;
g1 += g;
b1 += b;
lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
b = p[4];
g = p[5];
r = p[6];
r1 += r;
g1 += g;
b1 += b;
lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
cb[0] = ((- FIX(0.16874) * r1 - FIX(0.33126) * g1 +
FIX(0.50000) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
cr[0] = ((FIX(0.50000) * r1 - FIX(0.41869) * g1 -
FIX(0.08131) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
cb++;
cr++;
p += -wrap4 + 2 * 4;
lum += -wrap + 2;
}
p += wrap4;
lum += wrap;
}
}
/* XXX: use generic filter ? */
/* 1x2 -> 1x1 */
static void shrink2(UINT8 *dst, int dst_wrap,
@ -300,6 +426,98 @@ static void img_copy(UINT8 *dst, int dst_wrap,
b = cm[(y + b_add) >> SCALE_BITS];\
}
/* XXX: no chroma interpolating is done */
static void yuv420p_to_bgra32(AVPicture *dst, AVPicture *src,
int width, int height)
{
UINT8 *y1_ptr, *y2_ptr, *cb_ptr, *cr_ptr, *d, *d1, *d2;
int w, y, cb, cr, r_add, g_add, b_add, width2;
UINT8 *cm = cropTbl + MAX_NEG_CROP;
d = dst->data[0];
y1_ptr = src->data[0];
cb_ptr = src->data[1];
cr_ptr = src->data[2];
width2 = width >> 1;
for(;height > 0; height -= 2) {
d1 = d;
d2 = d + dst->linesize[0];
y2_ptr = y1_ptr + src->linesize[0];
for(w = width2; w > 0; w --) {
cb = cb_ptr[0] - 128;
cr = cr_ptr[0] - 128;
r_add = C_RV * cr + (1 << (SCALE_BITS - 1));
g_add = - C_GU * cb - C_GV * cr + (1 << (SCALE_BITS - 1));
b_add = C_BU * cb + (1 << (SCALE_BITS - 1));
/* output 4 pixels */
RGBOUT(d1[2], d1[1], d1[0], y1_ptr[0]);
RGBOUT(d1[6], d1[5], d1[4], y1_ptr[1]);
RGBOUT(d2[2], d2[1], d2[0], y2_ptr[0]);
RGBOUT(d2[6], d2[5], d2[4], y2_ptr[1]);
d1[3] = d1[7] = d2[3] = d2[7] = 255;
d1 += 8;
d2 += 8;
y1_ptr += 2;
y2_ptr += 2;
cb_ptr++;
cr_ptr++;
}
d += 2 * dst->linesize[0];
y1_ptr += 2 * src->linesize[0] - width;
cb_ptr += src->linesize[1] - width2;
cr_ptr += src->linesize[2] - width2;
}
}
/* XXX: no chroma interpolating is done */
static void yuv420p_to_rgba32(AVPicture *dst, AVPicture *src,
int width, int height)
{
UINT8 *y1_ptr, *y2_ptr, *cb_ptr, *cr_ptr, *d, *d1, *d2;
int w, y, cb, cr, r_add, g_add, b_add, width2;
UINT8 *cm = cropTbl + MAX_NEG_CROP;
d = dst->data[0];
y1_ptr = src->data[0];
cb_ptr = src->data[1];
cr_ptr = src->data[2];
width2 = width >> 1;
for(;height > 0; height -= 2) {
d1 = d;
d2 = d + dst->linesize[0];
y2_ptr = y1_ptr + src->linesize[0];
for(w = width2; w > 0; w --) {
cb = cb_ptr[0] - 128;
cr = cr_ptr[0] - 128;
r_add = C_RV * cr + (1 << (SCALE_BITS - 1));
g_add = - C_GU * cb - C_GV * cr + (1 << (SCALE_BITS - 1));
b_add = C_BU * cb + (1 << (SCALE_BITS - 1));
/* output 4 pixels */
RGBOUT(d1[0], d1[1], d1[2], y1_ptr[0]);
RGBOUT(d1[4], d1[5], d1[6], y1_ptr[1]);
RGBOUT(d2[0], d2[1], d2[2], y2_ptr[0]);
RGBOUT(d2[4], d2[5], d2[6], y2_ptr[1]);
d1[3] = d1[7] = d2[3] = d2[7] = 255;
d1 += 8;
d2 += 8;
y1_ptr += 2;
y2_ptr += 2;
cb_ptr++;
cr_ptr++;
}
d += 2 * dst->linesize[0];
y1_ptr += 2 * src->linesize[0] - width;
cb_ptr += src->linesize[1] - width2;
cr_ptr += src->linesize[2] - width2;
}
}
/* XXX: no chroma interpolating is done */
static void yuv420p_to_rgb24(AVPicture *dst, AVPicture *src,
int width, int height)
@ -460,10 +678,18 @@ int img_convert(AVPicture *dst, int dst_pix_fmt,
rgb24_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
src->data[0], width, height);
break;
case PIX_FMT_RGBA32:
rgba32_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
src->data[0], width, height);
break;
case PIX_FMT_BGR24:
bgr24_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
src->data[0], width, height);
break;
case PIX_FMT_BGRA32:
bgra32_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
src->data[0], width, height);
break;
default:
return -1;
}
@ -478,6 +704,22 @@ int img_convert(AVPicture *dst, int dst_pix_fmt,
default:
return -1;
}
} else if (dst_pix_fmt == PIX_FMT_RGBA32) {
switch(pix_fmt) {
case PIX_FMT_YUV420P:
yuv420p_to_rgba32(dst, src, width, height);
break;
default:
return -1;
}
} else if (dst_pix_fmt == PIX_FMT_BGRA32) {
switch(pix_fmt) {
case PIX_FMT_YUV420P:
yuv420p_to_bgra32(dst, src, width, height);
break;
default:
return -1;
}
} else {
return -1;
}

15
libavcodec/utils.c
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@ -199,6 +199,8 @@ const char *pix_fmt_str[] = {
"bgr24",
"yuv422p",
"yuv444p",
"rgba32",
"bgra32",
"yuv410p"
};
@ -299,7 +301,7 @@ void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
}
break;
default:
abort();
av_abort();
}
if (bitrate != 0) {
snprintf(buf + strlen(buf), buf_size - strlen(buf),
@ -346,6 +348,13 @@ void avpicture_fill(AVPicture *picture, UINT8 *ptr,
picture->data[2] = NULL;
picture->linesize[0] = width * 3;
break;
case PIX_FMT_RGBA32:
case PIX_FMT_BGRA32:
picture->data[0] = ptr;
picture->data[1] = NULL;
picture->data[2] = NULL;
picture->linesize[0] = width * 4;
break;
case PIX_FMT_YUV422:
picture->data[0] = ptr;
picture->data[1] = NULL;
@ -379,6 +388,10 @@ int avpicture_get_size(int pix_fmt, int width, int height)
case PIX_FMT_BGR24:
size = (size * 3);
break;
case PIX_FMT_RGBA32:
case PIX_FMT_BGRA32:
size = (size * 4);
break;
case PIX_FMT_YUV422:
size = (size * 2);
break;

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