diff options
Diffstat (limited to 'media/base/yuv_row_linux.cc')
| -rw-r--r-- | media/base/yuv_row_linux.cc | 88 |
1 files changed, 13 insertions, 75 deletions
diff --git a/media/base/yuv_row_linux.cc b/media/base/yuv_row_linux.cc index 4acc454..db7c753 100644 --- a/media/base/yuv_row_linux.cc +++ b/media/base/yuv_row_linux.cc @@ -150,101 +150,39 @@ static inline void YuvPixel(uint8 y, (0xff000000); } -void ConvertYV12ToRGB32Row(const uint8* y_buf, - const uint8* u_buf, - const uint8* v_buf, - uint8* rgb_buf, - int width) { +void FastConvertYUVToRGB32Row(const uint8* y_buf, + const uint8* u_buf, + const uint8* v_buf, + uint8* rgb_buf, + int width) { for (int32 x = 0; x < static_cast<int32>(width); x += 2) { uint8 u = u_buf[x >> 1]; uint8 v = v_buf[x >> 1]; - int32 d = static_cast<int32>(u) - 128; - int32 e = static_cast<int32>(v) - 128; - - int32 cb = (516 * d + 128); - int32 cg = (- 100 * d - 208 * e + 128); - int32 cr = (409 * e + 128); - uint8 y0 = y_buf[x]; - int32 C298a = ((static_cast<int32>(y0) - 16) * 298 + 128); - *reinterpret_cast<uint32*>(rgb_buf) = clip(C298a + cb) | - (clip(C298a + cg) << 8) | - (clip(C298a + cr) << 16) | - 0xff000000; - uint8 y1 = y_buf[x + 1]; - int32 C298b = ((static_cast<int32>(y1) - 16) * 298 + 128); - *reinterpret_cast<uint32*>(rgb_buf + 4) = clip(C298b + cb) | - (clip(C298b + cg) << 8) | - (clip(C298b + cr) << 16) | - 0xff000000; + YuvPixel(y0, u, v, rgb_buf); + YuvPixel(y1, u, v, rgb_buf + 4); rgb_buf += 8; // Advance 2 pixels. } } -void HalfYV12ToRGB32Row(const uint8* y_buf, - const uint8* u_buf, - const uint8* v_buf, - uint8* rgb_buf, - int width) { - for (int32 x = 0; x < width; ++x) { - uint8 u = u_buf[x]; - uint8 v = v_buf[x]; - int32 d = static_cast<int32>(u) - 128; - int32 e = static_cast<int32>(v) - 128; - - int32 cb = (516 * d + 128); - int32 cg = (- 100 * d - 208 * e + 128); - int32 cr = (409 * e + 128); - - uint8 y0 = y_buf[x * 2 + 0]; - uint8 y1 = y_buf[x * 2 + 1]; - int32 C298a = ((static_cast<int32>((y0 + y1) >> 1) - 16) * 298 + 128); - *reinterpret_cast<uint32*>(rgb_buf) = clip(C298a + cb) | - (clip(C298a + cg) << 8) | - (clip(C298a + cr) << 16) | - 0xff000000; - - rgb_buf += 4; - } -} - // 28.4 fixed point is used. A shift by 4 isolates the integer. // A shift by 5 is used to further subsample the chrominence channels. // & 15 isolates the fixed point fraction. >> 2 to get the upper 2 bits, // for 1/4 pixel accurate interpolation. -void ScaleYV12ToRGB32Row(const uint8* y_buf, - const uint8* u_buf, - const uint8* v_buf, - uint8* rgb_buf, - int width, - int scaled_dx) { +void ScaleYUVToRGB32Row(const uint8* y_buf, + const uint8* u_buf, + const uint8* v_buf, + uint8* rgb_buf, + int width, + int scaled_dx) { int scaled_x = 0; for (int32 x = 0; x < width; ++x) { uint8 u = u_buf[scaled_x >> 5]; uint8 v = v_buf[scaled_x >> 5]; uint8 y0 = y_buf[scaled_x >> 4]; -#if MEDIA_BILINEAR_FILTER - uint8 y1 = y_buf[(scaled_x >> 4) + 1]; - switch ((scaled_x & 15) >> 2) { - case 1: // 75% first pixel, 25% second pixel. - y0 = (y0 + y0 + y0 + y1) >> 2; - break; - case 2: // 50/50 blend - y0 = (y0 + y1) >> 1; - break; - case 3: // 25% first pixel, 75% second pixel. - y0 = (y0 + y1 + y1 + y1) >> 2; - break; - default: - case 0: // 100% first pixel. - break; - } -#endif // MEDIA_BILINEAR_FILTER - YuvPixel(y0, u, v, rgb_buf); - rgb_buf += 4; scaled_x += scaled_dx; } |