| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // This webpage shows layout of YV12 and other YUV formats |
| // http://www.fourcc.org/yuv.php |
| // The actual conversion is best described here |
| // http://en.wikipedia.org/wiki/YUV |
| // An article on optimizing YUV conversion using tables instead of multiplies |
| // http://lestourtereaux.free.fr/papers/data/yuvrgb.pdf |
| // |
| // YV12 is a full plane of Y and a half height, half width chroma planes |
| // YV16 is a full plane of Y and a full height, half width chroma planes |
| // |
| // ARGB pixel format is output, which on little endian is stored as BGRA. |
| // The alpha is set to 255, allowing the application to use RGBA or RGB32. |
| |
| #include "media/base/yuv_convert.h" |
| |
| #include "base/logging.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "build/build_config.h" |
| #include "media/base/cpu_features.h" |
| #include "media/base/simd/convert_rgb_to_yuv.h" |
| #include "media/base/simd/convert_yuv_to_rgb.h" |
| #include "media/base/simd/filter_yuv.h" |
| |
| #if defined(ARCH_CPU_X86_FAMILY) |
| #if defined(COMPILER_MSVC) |
| #include <intrin.h> |
| #else |
| #include <mmintrin.h> |
| #endif |
| #endif |
| |
| namespace media { |
| |
| static FilterYUVRowsProc ChooseFilterYUVRowsProc() { |
| #if defined(ARCH_CPU_X86_FAMILY) |
| if (hasSSE2()) |
| return &FilterYUVRows_SSE2; |
| if (hasMMX()) |
| return &FilterYUVRows_MMX; |
| #endif |
| return &FilterYUVRows_C; |
| } |
| |
| static ConvertYUVToRGB32RowProc ChooseConvertYUVToRGB32RowProc() { |
| #if defined(ARCH_CPU_X86_FAMILY) |
| if (hasSSE()) |
| return &ConvertYUVToRGB32Row_SSE; |
| if (hasMMX()) |
| return &ConvertYUVToRGB32Row_MMX; |
| #endif |
| return &ConvertYUVToRGB32Row_C; |
| } |
| |
| static ScaleYUVToRGB32RowProc ChooseScaleYUVToRGB32RowProc() { |
| #if defined(ARCH_CPU_X86_64) |
| // Use 64-bits version if possible. |
| return &ScaleYUVToRGB32Row_SSE2_X64; |
| #elif defined(ARCH_CPU_X86_FAMILY) |
| // Choose the best one on 32-bits system. |
| if (hasSSE()) |
| return &ScaleYUVToRGB32Row_SSE; |
| if (hasMMX()) |
| return &ScaleYUVToRGB32Row_MMX; |
| #endif // defined(ARCH_CPU_X86_64) |
| return &ScaleYUVToRGB32Row_C; |
| } |
| |
| static ScaleYUVToRGB32RowProc ChooseLinearScaleYUVToRGB32RowProc() { |
| #if defined(ARCH_CPU_X86_64) |
| // Use 64-bits version if possible. |
| return &LinearScaleYUVToRGB32Row_MMX_X64; |
| #elif defined(ARCH_CPU_X86_FAMILY) |
| // 32-bits system. |
| if (hasSSE()) |
| return &LinearScaleYUVToRGB32Row_SSE; |
| if (hasMMX()) |
| return &LinearScaleYUVToRGB32Row_MMX; |
| #endif // defined(ARCH_CPU_X86_64) |
| return &LinearScaleYUVToRGB32Row_C; |
| } |
| |
| // Empty SIMD registers state after using them. |
| void EmptyRegisterState() { |
| #if defined(ARCH_CPU_X86_FAMILY) |
| static bool checked = false; |
| static bool has_mmx = false; |
| if (!checked) { |
| has_mmx = hasMMX(); |
| checked = true; |
| } |
| if (has_mmx) |
| _mm_empty(); |
| #endif |
| } |
| |
| // 16.16 fixed point arithmetic |
| const int kFractionBits = 16; |
| const int kFractionMax = 1 << kFractionBits; |
| const int kFractionMask = ((1 << kFractionBits) - 1); |
| |
| // Scale a frame of YUV to 32 bit ARGB. |
| void ScaleYUVToRGB32(const uint8* y_buf, |
| const uint8* u_buf, |
| const uint8* v_buf, |
| uint8* rgb_buf, |
| int source_width, |
| int source_height, |
| int width, |
| int height, |
| int y_pitch, |
| int uv_pitch, |
| int rgb_pitch, |
| YUVType yuv_type, |
| Rotate view_rotate, |
| ScaleFilter filter) { |
| static FilterYUVRowsProc filter_proc = NULL; |
| static ConvertYUVToRGB32RowProc convert_proc = NULL; |
| static ScaleYUVToRGB32RowProc scale_proc = NULL; |
| static ScaleYUVToRGB32RowProc linear_scale_proc = NULL; |
| |
| if (!filter_proc) |
| filter_proc = ChooseFilterYUVRowsProc(); |
| if (!convert_proc) |
| convert_proc = ChooseConvertYUVToRGB32RowProc(); |
| if (!scale_proc) |
| scale_proc = ChooseScaleYUVToRGB32RowProc(); |
| if (!linear_scale_proc) |
| linear_scale_proc = ChooseLinearScaleYUVToRGB32RowProc(); |
| |
| // Handle zero sized sources and destinations. |
| if ((yuv_type == YV12 && (source_width < 2 || source_height < 2)) || |
| (yuv_type == YV16 && (source_width < 2 || source_height < 1)) || |
| width == 0 || height == 0) |
| return; |
| |
| // 4096 allows 3 buffers to fit in 12k. |
| // Helps performance on CPU with 16K L1 cache. |
| // Large enough for 3830x2160 and 30" displays which are 2560x1600. |
| const int kFilterBufferSize = 4096; |
| // Disable filtering if the screen is too big (to avoid buffer overflows). |
| // This should never happen to regular users: they don't have monitors |
| // wider than 4096 pixels. |
| // TODO(fbarchard): Allow rotated videos to filter. |
| if (source_width > kFilterBufferSize || view_rotate) |
| filter = FILTER_NONE; |
| |
| unsigned int y_shift = yuv_type; |
| // Diagram showing origin and direction of source sampling. |
| // ->0 4<- |
| // 7 3 |
| // |
| // 6 5 |
| // ->1 2<- |
| // Rotations that start at right side of image. |
| if ((view_rotate == ROTATE_180) || |
| (view_rotate == ROTATE_270) || |
| (view_rotate == MIRROR_ROTATE_0) || |
| (view_rotate == MIRROR_ROTATE_90)) { |
| y_buf += source_width - 1; |
| u_buf += source_width / 2 - 1; |
| v_buf += source_width / 2 - 1; |
| source_width = -source_width; |
| } |
| // Rotations that start at bottom of image. |
| if ((view_rotate == ROTATE_90) || |
| (view_rotate == ROTATE_180) || |
| (view_rotate == MIRROR_ROTATE_90) || |
| (view_rotate == MIRROR_ROTATE_180)) { |
| y_buf += (source_height - 1) * y_pitch; |
| u_buf += ((source_height >> y_shift) - 1) * uv_pitch; |
| v_buf += ((source_height >> y_shift) - 1) * uv_pitch; |
| source_height = -source_height; |
| } |
| |
| int source_dx = source_width * kFractionMax / width; |
| |
| if ((view_rotate == ROTATE_90) || |
| (view_rotate == ROTATE_270)) { |
| int tmp = height; |
| height = width; |
| width = tmp; |
| tmp = source_height; |
| source_height = source_width; |
| source_width = tmp; |
| int source_dy = source_height * kFractionMax / height; |
| source_dx = ((source_dy >> kFractionBits) * y_pitch) << kFractionBits; |
| if (view_rotate == ROTATE_90) { |
| y_pitch = -1; |
| uv_pitch = -1; |
| source_height = -source_height; |
| } else { |
| y_pitch = 1; |
| uv_pitch = 1; |
| } |
| } |
| |
| // Need padding because FilterRows() will write 1 to 16 extra pixels |
| // after the end for SSE2 version. |
| uint8 yuvbuf[16 + kFilterBufferSize * 3 + 16]; |
| uint8* ybuf = |
| reinterpret_cast<uint8*>(reinterpret_cast<uintptr_t>(yuvbuf + 15) & ~15); |
| uint8* ubuf = ybuf + kFilterBufferSize; |
| uint8* vbuf = ubuf + kFilterBufferSize; |
| // TODO(fbarchard): Fixed point math is off by 1 on negatives. |
| int yscale_fixed = (source_height << kFractionBits) / height; |
| |
| // TODO(fbarchard): Split this into separate function for better efficiency. |
| for (int y = 0; y < height; ++y) { |
| uint8* dest_pixel = rgb_buf + y * rgb_pitch; |
| int source_y_subpixel = (y * yscale_fixed); |
| if (yscale_fixed >= (kFractionMax * 2)) { |
| source_y_subpixel += kFractionMax / 2; // For 1/2 or less, center filter. |
| } |
| int source_y = source_y_subpixel >> kFractionBits; |
| |
| const uint8* y0_ptr = y_buf + source_y * y_pitch; |
| const uint8* y1_ptr = y0_ptr + y_pitch; |
| |
| const uint8* u0_ptr = u_buf + (source_y >> y_shift) * uv_pitch; |
| const uint8* u1_ptr = u0_ptr + uv_pitch; |
| const uint8* v0_ptr = v_buf + (source_y >> y_shift) * uv_pitch; |
| const uint8* v1_ptr = v0_ptr + uv_pitch; |
| |
| // vertical scaler uses 16.8 fixed point |
| int source_y_fraction = (source_y_subpixel & kFractionMask) >> 8; |
| int source_uv_fraction = |
| ((source_y_subpixel >> y_shift) & kFractionMask) >> 8; |
| |
| const uint8* y_ptr = y0_ptr; |
| const uint8* u_ptr = u0_ptr; |
| const uint8* v_ptr = v0_ptr; |
| // Apply vertical filtering if necessary. |
| // TODO(fbarchard): Remove memcpy when not necessary. |
| if (filter & media::FILTER_BILINEAR_V) { |
| if (yscale_fixed != kFractionMax && |
| source_y_fraction && ((source_y + 1) < source_height)) { |
| filter_proc(ybuf, y0_ptr, y1_ptr, source_width, source_y_fraction); |
| } else { |
| memcpy(ybuf, y0_ptr, source_width); |
| } |
| y_ptr = ybuf; |
| ybuf[source_width] = ybuf[source_width-1]; |
| int uv_source_width = (source_width + 1) / 2; |
| if (yscale_fixed != kFractionMax && |
| source_uv_fraction && |
| (((source_y >> y_shift) + 1) < (source_height >> y_shift))) { |
| filter_proc(ubuf, u0_ptr, u1_ptr, uv_source_width, source_uv_fraction); |
| filter_proc(vbuf, v0_ptr, v1_ptr, uv_source_width, source_uv_fraction); |
| } else { |
| memcpy(ubuf, u0_ptr, uv_source_width); |
| memcpy(vbuf, v0_ptr, uv_source_width); |
| } |
| u_ptr = ubuf; |
| v_ptr = vbuf; |
| ubuf[uv_source_width] = ubuf[uv_source_width - 1]; |
| vbuf[uv_source_width] = vbuf[uv_source_width - 1]; |
| } |
| if (source_dx == kFractionMax) { // Not scaled |
| convert_proc(y_ptr, u_ptr, v_ptr, dest_pixel, width); |
| } else { |
| if (filter & FILTER_BILINEAR_H) { |
| linear_scale_proc(y_ptr, u_ptr, v_ptr, dest_pixel, width, source_dx); |
| } else { |
| scale_proc(y_ptr, u_ptr, v_ptr, dest_pixel, width, source_dx); |
| } |
| } |
| } |
| |
| EmptyRegisterState(); |
| } |
| |
| // Scale a frame of YV12 to 32 bit ARGB for a specific rectangle. |
| void ScaleYUVToRGB32WithRect(const uint8* y_buf, |
| const uint8* u_buf, |
| const uint8* v_buf, |
| uint8* rgb_buf, |
| int source_width, |
| int source_height, |
| int dest_width, |
| int dest_height, |
| int dest_rect_left, |
| int dest_rect_top, |
| int dest_rect_right, |
| int dest_rect_bottom, |
| int y_pitch, |
| int uv_pitch, |
| int rgb_pitch) { |
| static FilterYUVRowsProc filter_proc = NULL; |
| if (!filter_proc) |
| filter_proc = ChooseFilterYUVRowsProc(); |
| |
| // This routine doesn't currently support up-scaling. |
| CHECK_LE(dest_width, source_width); |
| CHECK_LE(dest_height, source_height); |
| |
| // Sanity-check the destination rectangle. |
| DCHECK(dest_rect_left >= 0 && dest_rect_right <= dest_width); |
| DCHECK(dest_rect_top >= 0 && dest_rect_bottom <= dest_height); |
| DCHECK(dest_rect_right > dest_rect_left); |
| DCHECK(dest_rect_bottom > dest_rect_top); |
| |
| // Fixed-point value of vertical and horizontal scale down factor. |
| // Values are in the format 16.16. |
| int y_step = kFractionMax * source_height / dest_height; |
| int x_step = kFractionMax * source_width / dest_width; |
| |
| // Determine the coordinates of the rectangle in 16.16 coords. |
| // NB: Our origin is the *center* of the top/left pixel, NOT its top/left. |
| // If we're down-scaling by more than a factor of two, we start with a 50% |
| // fraction to avoid degenerating to point-sampling - we should really just |
| // fix the fraction at 50% for all pixels in that case. |
| int source_left = dest_rect_left * x_step; |
| int source_right = (dest_rect_right - 1) * x_step; |
| if (x_step < kFractionMax * 2) { |
| source_left += ((x_step - kFractionMax) / 2); |
| source_right += ((x_step - kFractionMax) / 2); |
| } else { |
| source_left += kFractionMax / 2; |
| source_right += kFractionMax / 2; |
| } |
| int source_top = dest_rect_top * y_step; |
| if (y_step < kFractionMax * 2) { |
| source_top += ((y_step - kFractionMax) / 2); |
| } else { |
| source_top += kFractionMax / 2; |
| } |
| |
| // Determine the parts of the Y, U and V buffers to interpolate. |
| int source_y_left = source_left >> kFractionBits; |
| int source_y_right = std::min( |
| (source_right >> kFractionBits) + 2, |
| source_width + 1); |
| |
| int source_uv_left = source_y_left / 2; |
| int source_uv_right = std::min( |
| (source_right >> (kFractionBits + 1)) + 2, |
| (source_width + 1) / 2); |
| |
| int source_y_width = source_y_right - source_y_left; |
| int source_uv_width = source_uv_right - source_uv_left; |
| |
| // Determine number of pixels in each output row. |
| int dest_rect_width = dest_rect_right - dest_rect_left; |
| |
| // Intermediate buffer for vertical interpolation. |
| // 4096 bytes allows 3 buffers to fit in 12k, which fits in a 16K L1 cache, |
| // and is bigger than most users will generally need. |
| // The buffer is 16-byte aligned and padded with 16 extra bytes; some of the |
| // FilterYUVRowProcs have alignment requirements, and the SSE version can |
| // write up to 16 bytes past the end of the buffer. |
| const int kFilterBufferSize = 4096; |
| if (source_width > kFilterBufferSize) |
| filter_proc = NULL; |
| uint8 yuv_temp[16 + kFilterBufferSize * 3 + 16]; |
| uint8* y_temp = |
| reinterpret_cast<uint8*>( |
| reinterpret_cast<uintptr_t>(yuv_temp + 15) & ~15); |
| uint8* u_temp = y_temp + kFilterBufferSize; |
| uint8* v_temp = u_temp + kFilterBufferSize; |
| |
| // Move to the top-left pixel of output. |
| rgb_buf += dest_rect_top * rgb_pitch; |
| rgb_buf += dest_rect_left * 4; |
| |
| // For each destination row perform interpolation and color space |
| // conversion to produce the output. |
| for (int row = dest_rect_top; row < dest_rect_bottom; ++row) { |
| // Round the fixed-point y position to get the current row. |
| int source_row = source_top >> kFractionBits; |
| int source_uv_row = source_row / 2; |
| DCHECK(source_row < source_height); |
| |
| // Locate the first row for each plane for interpolation. |
| const uint8* y0_ptr = y_buf + y_pitch * source_row + source_y_left; |
| const uint8* u0_ptr = u_buf + uv_pitch * source_uv_row + source_uv_left; |
| const uint8* v0_ptr = v_buf + uv_pitch * source_uv_row + source_uv_left; |
| const uint8* y1_ptr = NULL; |
| const uint8* u1_ptr = NULL; |
| const uint8* v1_ptr = NULL; |
| |
| // Locate the second row for interpolation, being careful not to overrun. |
| if (source_row + 1 >= source_height) { |
| y1_ptr = y0_ptr; |
| } else { |
| y1_ptr = y0_ptr + y_pitch; |
| } |
| if (source_uv_row + 1 >= (source_height + 1) / 2) { |
| u1_ptr = u0_ptr; |
| v1_ptr = v0_ptr; |
| } else { |
| u1_ptr = u0_ptr + uv_pitch; |
| v1_ptr = v0_ptr + uv_pitch; |
| } |
| |
| if (filter_proc) { |
| // Vertical scaler uses 16.8 fixed point. |
| int fraction = (source_top & kFractionMask) >> 8; |
| filter_proc(y_temp + source_y_left, y0_ptr, y1_ptr, |
| source_y_width, fraction); |
| filter_proc(u_temp + source_uv_left, u0_ptr, u1_ptr, |
| source_uv_width, fraction); |
| filter_proc(v_temp + source_uv_left, v0_ptr, v1_ptr, |
| source_uv_width, fraction); |
| |
| // Perform horizontal interpolation and color space conversion. |
| // TODO(hclam): Use the MMX version after more testing. |
| LinearScaleYUVToRGB32RowWithRange_C( |
| y_temp, u_temp, v_temp, rgb_buf, |
| dest_rect_width, source_left, x_step); |
| } else { |
| // If the frame is too large then we linear scale a single row. |
| LinearScaleYUVToRGB32RowWithRange_C( |
| y0_ptr, u0_ptr, v0_ptr, rgb_buf, |
| dest_rect_width, source_left, x_step); |
| } |
| |
| // Advance vertically in the source and destination image. |
| source_top += y_step; |
| rgb_buf += rgb_pitch; |
| } |
| |
| EmptyRegisterState(); |
| } |
| |
| void ConvertRGB32ToYUV(const uint8* rgbframe, |
| uint8* yplane, |
| uint8* uplane, |
| uint8* vplane, |
| int width, |
| int height, |
| int rgbstride, |
| int ystride, |
| int uvstride) { |
| static void (*convert_proc)(const uint8*, uint8*, uint8*, uint8*, |
| int, int, int, int, int) = NULL; |
| if (!convert_proc) { |
| #if defined(ARCH_CPU_ARM_FAMILY) |
| // For ARM processors, always use C version. |
| // TODO(hclam): Implement a NEON version. |
| convert_proc = &ConvertRGB32ToYUV_C; |
| #else |
| // TODO(hclam): Switch to SSSE3 version when the cyan problem is solved. |
| // See: crbug.com/100462 |
| if (hasSSE2()) |
| convert_proc = &ConvertRGB32ToYUV_SSE2; |
| else |
| convert_proc = &ConvertRGB32ToYUV_C; |
| #endif |
| } |
| |
| convert_proc(rgbframe, yplane, uplane, vplane, width, height, |
| rgbstride, ystride, uvstride); |
| } |
| |
| void ConvertRGB24ToYUV(const uint8* rgbframe, |
| uint8* yplane, |
| uint8* uplane, |
| uint8* vplane, |
| int width, |
| int height, |
| int rgbstride, |
| int ystride, |
| int uvstride) { |
| #if defined(ARCH_CPU_ARM_FAMILY) |
| ConvertRGB24ToYUV_C(rgbframe, yplane, uplane, vplane, width, height, |
| rgbstride, ystride, uvstride); |
| #else |
| static void (*convert_proc)(const uint8*, uint8*, uint8*, uint8*, |
| int, int, int, int, int) = NULL; |
| if (!convert_proc) { |
| if (hasSSSE3()) |
| convert_proc = &ConvertRGB24ToYUV_SSSE3; |
| else |
| convert_proc = &ConvertRGB24ToYUV_C; |
| } |
| convert_proc(rgbframe, yplane, uplane, vplane, width, height, |
| rgbstride, ystride, uvstride); |
| #endif |
| } |
| |
| void ConvertYUY2ToYUV(const uint8* src, |
| uint8* yplane, |
| uint8* uplane, |
| uint8* vplane, |
| int width, |
| int height) { |
| for (int i = 0; i < height / 2; ++i) { |
| for (int j = 0; j < (width / 2); ++j) { |
| yplane[0] = src[0]; |
| *uplane = src[1]; |
| yplane[1] = src[2]; |
| *vplane = src[3]; |
| src += 4; |
| yplane += 2; |
| uplane++; |
| vplane++; |
| } |
| for (int j = 0; j < (width / 2); ++j) { |
| yplane[0] = src[0]; |
| yplane[1] = src[2]; |
| src += 4; |
| yplane += 2; |
| } |
| } |
| } |
| |
| void ConvertNV21ToYUV(const uint8* src, |
| uint8* yplane, |
| uint8* uplane, |
| uint8* vplane, |
| int width, |
| int height) { |
| int y_plane_size = width * height; |
| memcpy(yplane, src, y_plane_size); |
| |
| src += y_plane_size; |
| int u_plane_size = y_plane_size >> 2; |
| for (int i = 0; i < u_plane_size; ++i) { |
| *vplane++ = *src++; |
| *uplane++ = *src++; |
| } |
| } |
| |
| void ConvertYUVToRGB32(const uint8* yplane, |
| const uint8* uplane, |
| const uint8* vplane, |
| uint8* rgbframe, |
| int width, |
| int height, |
| int ystride, |
| int uvstride, |
| int rgbstride, |
| YUVType yuv_type) { |
| #if defined(ARCH_CPU_ARM_FAMILY) |
| ConvertYUVToRGB32_C(yplane, uplane, vplane, rgbframe, |
| width, height, ystride, uvstride, rgbstride, yuv_type); |
| #else |
| static ConvertYUVToRGB32Proc convert_proc = NULL; |
| if (!convert_proc) { |
| if (hasSSE()) |
| convert_proc = &ConvertYUVToRGB32_SSE; |
| else if (hasMMX()) |
| convert_proc = &ConvertYUVToRGB32_MMX; |
| else |
| convert_proc = &ConvertYUVToRGB32_C; |
| } |
| |
| convert_proc(yplane, uplane, vplane, rgbframe, |
| width, height, ystride, uvstride, rgbstride, yuv_type); |
| #endif |
| } |
| |
| } // namespace media |
