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| 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 // yuv_row internal functions to handle YUV conversion and scaling to RGB. | |
| 6 // These functions are used from both yuv_convert.cc and yuv_scale.cc. | |
| 7 | |
| 8 // TODO(fbarchard): Write function that can handle rotation and scaling. | |
| 9 | |
| 10 #ifndef MEDIA_BASE_YUV_ROW_H_ | |
| 11 #define MEDIA_BASE_YUV_ROW_H_ | |
| 12 | |
| 13 #include "base/basictypes.h" | |
| 14 | |
| 15 extern "C" { | |
| 16 // Can only do 1x. | |
| 17 // This is the second fastest of the scalers. | |
| 18 void FastConvertYUVToRGB32Row(const uint8* y_buf, | |
| 19 const uint8* u_buf, | |
| 20 const uint8* v_buf, | |
| 21 uint8* rgb_buf, | |
| 22 int width); | |
| 23 | |
| 24 // Can do 1x, half size or any scale down by an integer amount. | |
| 25 // Step can be negative (mirroring, rotate 180). | |
| 26 // This is the third fastest of the scalers. | |
| 27 void ConvertYUVToRGB32Row(const uint8* y_buf, | |
| 28 const uint8* u_buf, | |
| 29 const uint8* v_buf, | |
| 30 uint8* rgb_buf, | |
| 31 int width, | |
| 32 int step); | |
| 33 | |
| 34 // Rotate is like Convert, but applies different step to Y versus U and V. | |
| 35 // This allows rotation by 90 or 270, by stepping by stride. | |
| 36 // This is the forth fastest of the scalers. | |
| 37 void RotateConvertYUVToRGB32Row(const uint8* y_buf, | |
| 38 const uint8* u_buf, | |
| 39 const uint8* v_buf, | |
| 40 uint8* rgb_buf, | |
| 41 int width, | |
| 42 int ystep, | |
| 43 int uvstep); | |
| 44 | |
| 45 // Doubler does 4 pixels at a time. Each pixel is replicated. | |
| 46 // This is the fastest of the scalers. | |
| 47 void DoubleYUVToRGB32Row(const uint8* y_buf, | |
| 48 const uint8* u_buf, | |
| 49 const uint8* v_buf, | |
| 50 uint8* rgb_buf, | |
| 51 int width); | |
| 52 | |
| 53 // Handles arbitrary scaling up or down. | |
| 54 // Mirroring is supported, but not 90 or 270 degree rotation. | |
| 55 // Chroma is under sampled every 2 pixels for performance. | |
| 56 void ScaleYUVToRGB32Row(const uint8* y_buf, | |
| 57 const uint8* u_buf, | |
| 58 const uint8* v_buf, | |
| 59 uint8* rgb_buf, | |
| 60 int width, | |
| 61 int source_dx); | |
| 62 | |
| 63 // Handles arbitrary scaling up or down with bilinear filtering. | |
| 64 // Mirroring is supported, but not 90 or 270 degree rotation. | |
| 65 // Chroma is under sampled every 2 pixels for performance. | |
| 66 // This is the slowest of the scalers. | |
| 67 void LinearScaleYUVToRGB32Row(const uint8* y_buf, | |
| 68 const uint8* u_buf, | |
| 69 const uint8* v_buf, | |
| 70 uint8* rgb_buf, | |
| 71 int width, | |
| 72 int source_dx); | |
| 73 | |
| 74 void FastConvertRGB32ToYUVRow(const uint8* rgb_buf_1, | |
| 75 const uint8* rgb_buf_2, | |
| 76 uint8* y_buf_1, | |
| 77 uint8* y_buf_2, | |
| 78 uint8* u_buf, | |
| 79 uint8* v_buf, | |
| 80 int width); | |
| 81 | |
| 82 #if defined(_MSC_VER) | |
| 83 #define SIMD_ALIGNED(var) __declspec(align(16)) var | |
| 84 #else | |
| 85 #define SIMD_ALIGNED(var) var __attribute__((aligned(16))) | |
| 86 #endif | |
| 87 extern SIMD_ALIGNED(int16 kCoefficientsRgbY[768][4]); | |
| 88 | |
| 89 // Method to force C version. | |
| 90 //#define USE_MMX 0 | |
| 91 //#define USE_SSE2 0 | |
| 92 | |
| 93 #if !defined(USE_MMX) | |
| 94 // Windows, Mac and Linux/BSD use MMX | |
| 95 #if defined(__MMX__) || defined(_MSC_VER) | |
| 96 #define USE_MMX 1 | |
| 97 #else | |
| 98 #define USE_MMX 0 | |
| 99 #endif | |
| 100 #endif | |
| 101 | |
| 102 #if !defined(USE_SSE2) | |
| 103 #if defined(__SSE2__) || defined(ARCH_CPU_X86_64) || _M_IX86_FP==2 | |
| 104 #define USE_SSE2 1 | |
| 105 #else | |
| 106 #define USE_SSE2 0 | |
| 107 #endif | |
| 108 #endif | |
| 109 | |
| 110 // x64 uses MMX2 (SSE) so emms is not required. | |
| 111 // Warning C4799: function has no EMMS instruction. | |
| 112 // EMMS() is slow and should be called by the calling function once per image. | |
| 113 #if USE_MMX && !defined(ARCH_CPU_X86_64) | |
| 114 #if defined(_MSC_VER) | |
| 115 #define EMMS() __asm emms | |
| 116 #pragma warning(disable: 4799) | |
| 117 #else | |
| 118 #define EMMS() asm("emms") | |
| 119 #endif | |
| 120 #else | |
| 121 #define EMMS() | |
| 122 #endif | |
| 123 | |
| 124 } // extern "C" | |
| 125 | |
| 126 #endif // MEDIA_BASE_YUV_ROW_H_ | |
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Chromium Code Reviews
Issue 7888012:
Reorganize YUV scalers (Continued) (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src