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NV12ToARGB function for ios

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BUG=none
TEST=none
Review URL: https://webrtc-codereview.appspot.com/352014

git-svn-id: http://libyuv.googlecode.com/svn/trunk@142 16f28f9a-4ce2-e073-06de-1de4eb20be90
This commit is contained in:
fbarchard@google.com 2012-01-19 19:20:06 +00:00
parent 1eb4034778
commit fc99814a92
3 changed files with 67 additions and 1 deletions
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2
README.chromium
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@ -1,6 +1,6 @@
Name: libyuv Name: libyuv
URL: http://code.google.com/p/libyuv/ URL: http://code.google.com/p/libyuv/
Version: 141 Version: 142
License: BSD License: BSD
License File: LICENSE License File: LICENSE

6
include/libyuv/planar_functions.h
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@ -79,6 +79,12 @@ int I400ToI420(const uint8* src_y, int src_stride_y,
uint8* dst_v, int dst_stride_v, uint8* dst_v, int dst_stride_v,
int width, int height); int width, int height);
// Convert NV12 to ARGB.
int NV12ToARGB(const uint8* src_y, int src_stride_y,
const uint8* src_uv, int src_stride_uv,
uint8* dst_frame, int dst_stride_frame,
int width, int height);
// Convert NV12 to RGB565. Also used for NV21. // Convert NV12 to RGB565. Also used for NV21.
int NV12ToRGB565(const uint8* src_y, int src_stride_y, int NV12ToRGB565(const uint8* src_y, int src_stride_y,
const uint8* src_uv, int src_stride_uv, const uint8* src_uv, int src_stride_uv,

60
source/planar_functions.cc
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@ -2245,6 +2245,66 @@ int ARGBToRAW(const uint8* src_argb, int src_stride_argb,
return 0; return 0;
} }
// Convert NV12 to ARGB.
int NV12ToARGB(const uint8* src_y, int src_stride_y,
const uint8* src_uv, int src_stride_uv,
uint8* dst_rgb, int dst_stride_rgb,
int width, int height) {
// Negative height means invert the image.
if (height < 0) {
height = -height;
dst_rgb = dst_rgb + (height - 1) * dst_stride_rgb;
dst_stride_rgb = -dst_stride_rgb;
}
void (*FastConvertYUVToARGBRow)(const uint8* y_buf,
const uint8* u_buf,
const uint8* v_buf,
uint8* rgb_buf,
int width);
#if defined(HAS_FASTCONVERTYUVTOARGBROW_NEON)
if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(width, 16)) {
FastConvertYUVToARGBRow = FastConvertYUVToARGBRow_NEON;
} else
#elif defined(HAS_FASTCONVERTYUVTOARGBROW_SSSE3)
if (TestCpuFlag(kCpuHasSSSE3) && IS_ALIGNED(width, 8)) {
FastConvertYUVToARGBRow = FastConvertYUVToARGBRow_SSSE3;
} else
#endif
{
FastConvertYUVToARGBRow = FastConvertYUVToARGBRow_C;
}
int halfwidth = (width + 1) >> 1;
void (*SplitUV)(const uint8* src_uv, uint8* dst_u, uint8* dst_v, int pix);
#if defined(HAS_SPLITUV_NEON)
if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(halfwidth, 16)) {
SplitUV = SplitUV_NEON;
} else
#elif defined(HAS_SPLITUV_SSE2)
if (TestCpuFlag(kCpuHasSSE2) &&
IS_ALIGNED(halfwidth, 16) &&
IS_ALIGNED(src_uv, 16) && IS_ALIGNED(src_stride_uv, 16)) {
SplitUV = SplitUV_SSE2;
} else
#endif
{
SplitUV = SplitUV_C;
}
SIMD_ALIGNED(uint8 rowuv[kMaxStride * 2]);
for (int y = 0; y < height; ++y) {
if ((y & 1) == 0) {
// Copy a row of UV.
SplitUV(src_uv, rowuv, rowuv + kMaxStride, halfwidth);
src_uv += src_stride_uv;
}
FastConvertYUVToARGBRow(src_y, rowuv, rowuv + kMaxStride, dst_rgb, width);
dst_rgb += dst_stride_rgb;
src_y += src_stride_y;
}
return 0;
}
// Convert NV12 to RGB565. // Convert NV12 to RGB565.
int NV12ToRGB565(const uint8* src_y, int src_stride_y, int NV12ToRGB565(const uint8* src_y, int src_stride_y,
const uint8* src_uv, int src_stride_uv, const uint8* src_uv, int src_stride_uv,