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578 lines
22 KiB
C++
578 lines
22 KiB
C++
// Copyright (c) 2010 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// This webpage shows layout of YV12 and other YUV formats
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// http://www.fourcc.org/yuv.php
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// The actual conversion is best described here
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// http://en.wikipedia.org/wiki/YUV
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// An article on optimizing YUV conversion using tables instead of multiplies
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// http://lestourtereaux.free.fr/papers/data/yuvrgb.pdf
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//
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// YV12 is a full plane of Y and a half height, half width chroma planes
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// YV16 is a full plane of Y and a full height, half width chroma planes
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// YV24 is a full plane of Y and a full height, full width chroma planes
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// Y8 is a full plane of Y and no chroma planes (i.e., monochrome)
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//
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// ARGB pixel format is output, which on little endian is stored as BGRA.
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// The alpha is set to 255, allowing the application to use RGBA or RGB32.
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#include "yuv_convert.h"
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#include "mozilla/StaticPrefs_gfx.h"
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#include "libyuv.h"
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#include "scale_yuv_argb.h"
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// Header for low level row functions.
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#include "yuv_row.h"
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#include "mozilla/SSE.h"
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#include "mozilla/IntegerRange.h"
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namespace mozilla {
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namespace gfx {
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// 16.16 fixed point arithmetic
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const int kFractionBits = 16;
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const int kFractionMax = 1 << kFractionBits;
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const int kFractionMask = ((1 << kFractionBits) - 1);
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// clang-format off
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libyuv::FourCC FourCCFromYUVType(YUVType aYUVType) {
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switch (aYUVType) {
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case YV24: return libyuv::FOURCC_I444;
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case YV16: return libyuv::FOURCC_I422;
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case YV12: return libyuv::FOURCC_I420;
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case Y8: return libyuv::FOURCC_I400;
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default: return libyuv::FOURCC_ANY;
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}
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}
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int GBRPlanarToARGB(const uint8_t* src_y, int y_pitch,
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const uint8_t* src_u, int u_pitch,
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const uint8_t* src_v, int v_pitch,
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uint8_t* rgb_buf, int rgb_pitch,
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int pic_width, int pic_height) {
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// libyuv has no native conversion function for this
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// fixme: replace with something less awful
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for (const auto row : IntegerRange(pic_height)) {
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for (const auto col : IntegerRange(pic_width)) {
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rgb_buf[rgb_pitch * row + col * 4 + 0] = src_u[u_pitch * row + col];
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rgb_buf[rgb_pitch * row + col * 4 + 1] = src_y[y_pitch * row + col];
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rgb_buf[rgb_pitch * row + col * 4 + 2] = src_v[v_pitch * row + col];
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rgb_buf[rgb_pitch * row + col * 4 + 3] = 255;
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}
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}
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return 0;
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}
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// Convert a frame of YUV to 32 bit ARGB.
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void ConvertYCbCrToRGB32(const uint8_t* y_buf, const uint8_t* u_buf,
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const uint8_t* v_buf, uint8_t* rgb_buf, int pic_x,
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int pic_y, int pic_width, int pic_height, int y_pitch,
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int uv_pitch, int rgb_pitch, YUVType yuv_type,
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YUVColorSpace yuv_color_space,
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ColorRange color_range) {
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// Deprecated function's conversion is accurate.
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// libyuv converion is a bit inaccurate to get performance. It dynamically
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// calculates RGB from YUV to use simd. In it, signed byte is used for
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// conversion's coefficient, but it requests 129. libyuv cut 129 to 127. And
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// only 6 bits are used for a decimal part during the dynamic calculation.
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//
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// The function is still fast on some old intel chips.
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// See Bug 1256475.
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bool use_deprecated = StaticPrefs::gfx_ycbcr_accurate_conversion() ||
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(supports_mmx() && supports_sse() && !supports_sse3() &&
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yuv_color_space == YUVColorSpace::BT601 &&
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color_range == ColorRange::LIMITED);
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// The deprecated function only support BT601.
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// See Bug 1210357.
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if (yuv_color_space != YUVColorSpace::BT601) {
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use_deprecated = false;
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}
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if (use_deprecated) {
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ConvertYCbCrToRGB32_deprecated(y_buf, u_buf, v_buf, rgb_buf, pic_x, pic_y,
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pic_width, pic_height, y_pitch, uv_pitch,
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rgb_pitch, yuv_type);
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return;
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}
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decltype(libyuv::I420ToARGBMatrix)* fConvertYUVToARGB = nullptr;
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const uint8_t* src_y = nullptr;
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const uint8_t* src_u = nullptr;
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const uint8_t* src_v = nullptr;
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const libyuv::YuvConstants* yuv_constant = nullptr;
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switch (yuv_color_space) {
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case YUVColorSpace::BT2020:
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yuv_constant = color_range == ColorRange::LIMITED
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? &libyuv::kYuv2020Constants
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: &libyuv::kYuvV2020Constants;
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break;
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case YUVColorSpace::BT709:
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yuv_constant = color_range == ColorRange::LIMITED
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? &libyuv::kYuvH709Constants
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: &libyuv::kYuvF709Constants;
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break;
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case YUVColorSpace::Identity:
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MOZ_ASSERT(yuv_type == YV24, "Identity (aka RGB) with chroma subsampling is unsupported");
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if (yuv_type == YV24) {
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break;
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}
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[[fallthrough]]; // Assuming BT601 for unsupported input is better than crashing
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default:
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MOZ_FALLTHROUGH_ASSERT("Unsupported YUVColorSpace");
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case YUVColorSpace::BT601:
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yuv_constant = color_range == ColorRange::LIMITED
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? &libyuv::kYuvI601Constants
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: &libyuv::kYuvJPEGConstants;
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break;
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}
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switch (yuv_type) {
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case YV24: {
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src_y = y_buf + y_pitch * pic_y + pic_x;
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src_u = u_buf + uv_pitch * pic_y + pic_x;
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src_v = v_buf + uv_pitch * pic_y + pic_x;
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if (yuv_color_space == YUVColorSpace::Identity) {
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// Special case for RGB image
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DebugOnly<int> err =
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GBRPlanarToARGB(src_y, y_pitch, src_u, uv_pitch, src_v, uv_pitch,
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rgb_buf, rgb_pitch, pic_width, pic_height);
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MOZ_ASSERT(!err);
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return;
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}
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fConvertYUVToARGB = libyuv::I444ToARGBMatrix;
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break;
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}
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case YV16: {
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src_y = y_buf + y_pitch * pic_y + pic_x;
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src_u = u_buf + uv_pitch * pic_y + pic_x / 2;
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src_v = v_buf + uv_pitch * pic_y + pic_x / 2;
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fConvertYUVToARGB = libyuv::I422ToARGBMatrix;
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break;
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}
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case YV12: {
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src_y = y_buf + y_pitch * pic_y + pic_x;
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src_u = u_buf + (uv_pitch * pic_y + pic_x) / 2;
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src_v = v_buf + (uv_pitch * pic_y + pic_x) / 2;
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fConvertYUVToARGB = libyuv::I420ToARGBMatrix;
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break;
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}
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case Y8: {
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src_y = y_buf + y_pitch * pic_y + pic_x;
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MOZ_ASSERT(u_buf == nullptr);
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MOZ_ASSERT(v_buf == nullptr);
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if (color_range == ColorRange::LIMITED) {
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DebugOnly<int> err =
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libyuv::I400ToARGB(src_y, y_pitch, rgb_buf, rgb_pitch, pic_width,
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pic_height);
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MOZ_ASSERT(!err);
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} else {
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DebugOnly<int> err =
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libyuv::J400ToARGB(src_y, y_pitch, rgb_buf, rgb_pitch, pic_width,
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pic_height);
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MOZ_ASSERT(!err);
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}
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return;
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}
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default:
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MOZ_ASSERT_UNREACHABLE("Unsupported YUV type");
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}
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DebugOnly<int> err =
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fConvertYUVToARGB(src_y, y_pitch, src_u, uv_pitch, src_v, uv_pitch,
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rgb_buf, rgb_pitch, yuv_constant, pic_width, pic_height);
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MOZ_ASSERT(!err);
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}
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// Convert a frame of YUV to 32 bit ARGB.
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void ConvertYCbCrToRGB32_deprecated(const uint8_t* y_buf,
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const uint8_t* u_buf,
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const uint8_t* v_buf,
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uint8_t* rgb_buf,
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int pic_x,
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int pic_y,
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int pic_width,
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int pic_height,
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int y_pitch,
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int uv_pitch,
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int rgb_pitch,
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YUVType yuv_type) {
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unsigned int y_shift = yuv_type == YV12 ? 1 : 0;
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unsigned int x_shift = yuv_type == YV24 ? 0 : 1;
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// Test for SSE because the optimized code uses movntq, which is not part of MMX.
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bool has_sse = supports_mmx() && supports_sse();
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// There is no optimized YV24 SSE routine so we check for this and
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// fall back to the C code.
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has_sse &= yuv_type != YV24;
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bool odd_pic_x = yuv_type != YV24 && pic_x % 2 != 0;
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int x_width = odd_pic_x ? pic_width - 1 : pic_width;
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for (int y = pic_y; y < pic_height + pic_y; ++y) {
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uint8_t* rgb_row = rgb_buf + (y - pic_y) * rgb_pitch;
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const uint8_t* y_ptr = y_buf + y * y_pitch + pic_x;
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const uint8_t* u_ptr = u_buf + (y >> y_shift) * uv_pitch + (pic_x >> x_shift);
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const uint8_t* v_ptr = v_buf + (y >> y_shift) * uv_pitch + (pic_x >> x_shift);
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if (odd_pic_x) {
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// Handle the single odd pixel manually and use the
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// fast routines for the remaining.
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FastConvertYUVToRGB32Row_C(y_ptr++,
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u_ptr++,
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v_ptr++,
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rgb_row,
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1,
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x_shift);
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rgb_row += 4;
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}
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if (has_sse) {
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FastConvertYUVToRGB32Row(y_ptr,
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u_ptr,
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v_ptr,
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rgb_row,
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x_width);
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}
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else {
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FastConvertYUVToRGB32Row_C(y_ptr,
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u_ptr,
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v_ptr,
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rgb_row,
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x_width,
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x_shift);
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}
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}
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// MMX used for FastConvertYUVToRGB32Row requires emms instruction.
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if (has_sse)
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EMMS();
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}
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// C version does 8 at a time to mimic MMX code
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static void FilterRows_C(uint8_t* ybuf, const uint8_t* y0_ptr, const uint8_t* y1_ptr,
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int source_width, int source_y_fraction) {
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int y1_fraction = source_y_fraction;
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int y0_fraction = 256 - y1_fraction;
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uint8_t* end = ybuf + source_width;
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do {
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ybuf[0] = (y0_ptr[0] * y0_fraction + y1_ptr[0] * y1_fraction) >> 8;
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ybuf[1] = (y0_ptr[1] * y0_fraction + y1_ptr[1] * y1_fraction) >> 8;
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ybuf[2] = (y0_ptr[2] * y0_fraction + y1_ptr[2] * y1_fraction) >> 8;
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ybuf[3] = (y0_ptr[3] * y0_fraction + y1_ptr[3] * y1_fraction) >> 8;
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ybuf[4] = (y0_ptr[4] * y0_fraction + y1_ptr[4] * y1_fraction) >> 8;
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ybuf[5] = (y0_ptr[5] * y0_fraction + y1_ptr[5] * y1_fraction) >> 8;
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ybuf[6] = (y0_ptr[6] * y0_fraction + y1_ptr[6] * y1_fraction) >> 8;
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ybuf[7] = (y0_ptr[7] * y0_fraction + y1_ptr[7] * y1_fraction) >> 8;
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y0_ptr += 8;
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y1_ptr += 8;
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ybuf += 8;
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} while (ybuf < end);
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}
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#ifdef MOZILLA_MAY_SUPPORT_MMX
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void FilterRows_MMX(uint8_t* ybuf, const uint8_t* y0_ptr, const uint8_t* y1_ptr,
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int source_width, int source_y_fraction);
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#endif
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#ifdef MOZILLA_MAY_SUPPORT_SSE2
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void FilterRows_SSE2(uint8_t* ybuf, const uint8_t* y0_ptr, const uint8_t* y1_ptr,
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int source_width, int source_y_fraction);
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#endif
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static inline void FilterRows(uint8_t* ybuf, const uint8_t* y0_ptr,
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const uint8_t* y1_ptr, int source_width,
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int source_y_fraction) {
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#ifdef MOZILLA_MAY_SUPPORT_SSE2
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if (mozilla::supports_sse2()) {
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FilterRows_SSE2(ybuf, y0_ptr, y1_ptr, source_width, source_y_fraction);
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return;
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}
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#endif
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#ifdef MOZILLA_MAY_SUPPORT_MMX
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if (mozilla::supports_mmx()) {
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FilterRows_MMX(ybuf, y0_ptr, y1_ptr, source_width, source_y_fraction);
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return;
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}
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#endif
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FilterRows_C(ybuf, y0_ptr, y1_ptr, source_width, source_y_fraction);
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}
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// Scale a frame of YUV to 32 bit ARGB.
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void ScaleYCbCrToRGB32(const uint8_t* y_buf,
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const uint8_t* u_buf,
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const uint8_t* v_buf,
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uint8_t* rgb_buf,
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int source_width,
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int source_height,
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int width,
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int height,
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int y_pitch,
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int uv_pitch,
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int rgb_pitch,
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YUVType yuv_type,
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YUVColorSpace yuv_color_space,
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ScaleFilter filter) {
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bool use_deprecated =
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StaticPrefs::gfx_ycbcr_accurate_conversion() ||
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#if defined(XP_WIN) && defined(_M_X64)
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// libyuv does not support SIMD scaling on win 64bit. See Bug 1295927.
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supports_sse3() ||
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#endif
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(supports_mmx() && supports_sse() && !supports_sse3());
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// The deprecated function only support BT601.
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// See Bug 1210357.
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if (yuv_color_space != YUVColorSpace::BT601) {
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use_deprecated = false;
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}
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if (use_deprecated) {
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ScaleYCbCrToRGB32_deprecated(y_buf, u_buf, v_buf,
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rgb_buf,
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source_width, source_height,
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width, height,
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y_pitch, uv_pitch,
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rgb_pitch,
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yuv_type,
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ROTATE_0,
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filter);
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return;
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}
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DebugOnly<int> err =
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libyuv::YUVToARGBScale(y_buf, y_pitch,
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u_buf, uv_pitch,
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v_buf, uv_pitch,
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FourCCFromYUVType(yuv_type),
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yuv_color_space,
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source_width, source_height,
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rgb_buf, rgb_pitch,
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width, height,
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libyuv::kFilterBilinear);
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MOZ_ASSERT(!err);
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return;
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}
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// Scale a frame of YUV to 32 bit ARGB.
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void ScaleYCbCrToRGB32_deprecated(const uint8_t* y_buf,
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const uint8_t* u_buf,
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const uint8_t* v_buf,
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uint8_t* rgb_buf,
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int source_width,
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int source_height,
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int width,
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int height,
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int y_pitch,
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int uv_pitch,
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int rgb_pitch,
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YUVType yuv_type,
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Rotate view_rotate,
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ScaleFilter filter) {
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bool has_mmx = supports_mmx();
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// 4096 allows 3 buffers to fit in 12k.
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// Helps performance on CPU with 16K L1 cache.
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// Large enough for 3830x2160 and 30" displays which are 2560x1600.
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const int kFilterBufferSize = 4096;
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// Disable filtering if the screen is too big (to avoid buffer overflows).
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// This should never happen to regular users: they don't have monitors
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// wider than 4096 pixels.
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// TODO(fbarchard): Allow rotated videos to filter.
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if (source_width > kFilterBufferSize || view_rotate)
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filter = FILTER_NONE;
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unsigned int y_shift = yuv_type == YV12 ? 1 : 0;
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// Diagram showing origin and direction of source sampling.
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// ->0 4<-
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// 7 3
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//
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// 6 5
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// ->1 2<-
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// Rotations that start at right side of image.
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if ((view_rotate == ROTATE_180) ||
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(view_rotate == ROTATE_270) ||
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(view_rotate == MIRROR_ROTATE_0) ||
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(view_rotate == MIRROR_ROTATE_90)) {
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y_buf += source_width - 1;
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u_buf += source_width / 2 - 1;
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v_buf += source_width / 2 - 1;
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source_width = -source_width;
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}
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// Rotations that start at bottom of image.
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if ((view_rotate == ROTATE_90) ||
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(view_rotate == ROTATE_180) ||
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(view_rotate == MIRROR_ROTATE_90) ||
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(view_rotate == MIRROR_ROTATE_180)) {
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y_buf += (source_height - 1) * y_pitch;
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u_buf += ((source_height >> y_shift) - 1) * uv_pitch;
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v_buf += ((source_height >> y_shift) - 1) * uv_pitch;
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source_height = -source_height;
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}
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// Handle zero sized destination.
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if (width == 0 || height == 0)
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return;
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int source_dx = source_width * kFractionMax / width;
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int source_dy = source_height * kFractionMax / height;
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int source_dx_uv = source_dx;
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if ((view_rotate == ROTATE_90) ||
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(view_rotate == ROTATE_270)) {
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int tmp = height;
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height = width;
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width = tmp;
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tmp = source_height;
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source_height = source_width;
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source_width = tmp;
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int original_dx = source_dx;
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int original_dy = source_dy;
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source_dx = ((original_dy >> kFractionBits) * y_pitch) << kFractionBits;
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source_dx_uv = ((original_dy >> kFractionBits) * uv_pitch) << kFractionBits;
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source_dy = original_dx;
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if (view_rotate == ROTATE_90) {
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y_pitch = -1;
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uv_pitch = -1;
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source_height = -source_height;
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} else {
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y_pitch = 1;
|
|
uv_pitch = 1;
|
|
}
|
|
}
|
|
|
|
// Need padding because FilterRows() will write 1 to 16 extra pixels
|
|
// after the end for SSE2 version.
|
|
uint8_t yuvbuf[16 + kFilterBufferSize * 3 + 16];
|
|
uint8_t* ybuf =
|
|
reinterpret_cast<uint8_t*>(reinterpret_cast<uintptr_t>(yuvbuf + 15) & ~15);
|
|
uint8_t* ubuf = ybuf + kFilterBufferSize;
|
|
uint8_t* 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_t* 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_t* y0_ptr = y_buf + source_y * y_pitch;
|
|
const uint8_t* y1_ptr = y0_ptr + y_pitch;
|
|
|
|
const uint8_t* u0_ptr = u_buf + (source_y >> y_shift) * uv_pitch;
|
|
const uint8_t* u1_ptr = u0_ptr + uv_pitch;
|
|
const uint8_t* v0_ptr = v_buf + (source_y >> y_shift) * uv_pitch;
|
|
const uint8_t* 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_t* y_ptr = y0_ptr;
|
|
const uint8_t* u_ptr = u0_ptr;
|
|
const uint8_t* v_ptr = v0_ptr;
|
|
// Apply vertical filtering if necessary.
|
|
// TODO(fbarchard): Remove memcpy when not necessary.
|
|
if (filter & mozilla::gfx::FILTER_BILINEAR_V) {
|
|
if (yscale_fixed != kFractionMax &&
|
|
source_y_fraction && ((source_y + 1) < source_height)) {
|
|
FilterRows(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))) {
|
|
FilterRows(ubuf, u0_ptr, u1_ptr, uv_source_width, source_uv_fraction);
|
|
FilterRows(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
|
|
FastConvertYUVToRGB32Row(y_ptr, u_ptr, v_ptr,
|
|
dest_pixel, width);
|
|
} else if (filter & FILTER_BILINEAR_H) {
|
|
LinearScaleYUVToRGB32Row(y_ptr, u_ptr, v_ptr,
|
|
dest_pixel, width, source_dx);
|
|
} else {
|
|
// Specialized scalers and rotation.
|
|
#if defined(MOZILLA_MAY_SUPPORT_SSE) && defined(_MSC_VER) && defined(_M_IX86) && !defined(__clang__)
|
|
if(mozilla::supports_sse()) {
|
|
if (width == (source_width * 2)) {
|
|
DoubleYUVToRGB32Row_SSE(y_ptr, u_ptr, v_ptr,
|
|
dest_pixel, width);
|
|
} else if ((source_dx & kFractionMask) == 0) {
|
|
// Scaling by integer scale factor. ie half.
|
|
ConvertYUVToRGB32Row_SSE(y_ptr, u_ptr, v_ptr,
|
|
dest_pixel, width,
|
|
source_dx >> kFractionBits);
|
|
} else if (source_dx_uv == source_dx) { // Not rotated.
|
|
ScaleYUVToRGB32Row(y_ptr, u_ptr, v_ptr,
|
|
dest_pixel, width, source_dx);
|
|
} else {
|
|
RotateConvertYUVToRGB32Row_SSE(y_ptr, u_ptr, v_ptr,
|
|
dest_pixel, width,
|
|
source_dx >> kFractionBits,
|
|
source_dx_uv >> kFractionBits);
|
|
}
|
|
}
|
|
else {
|
|
ScaleYUVToRGB32Row_C(y_ptr, u_ptr, v_ptr,
|
|
dest_pixel, width, source_dx);
|
|
}
|
|
#else
|
|
(void)source_dx_uv;
|
|
ScaleYUVToRGB32Row(y_ptr, u_ptr, v_ptr,
|
|
dest_pixel, width, source_dx);
|
|
#endif
|
|
}
|
|
}
|
|
// MMX used for FastConvertYUVToRGB32Row and FilterRows requires emms.
|
|
if (has_mmx)
|
|
EMMS();
|
|
}
|
|
void ConvertI420AlphaToARGB32(const uint8_t* y_buf,
|
|
const uint8_t* u_buf,
|
|
const uint8_t* v_buf,
|
|
const uint8_t* a_buf,
|
|
uint8_t* argb_buf,
|
|
int pic_width,
|
|
int pic_height,
|
|
int ya_pitch,
|
|
int uv_pitch,
|
|
int argb_pitch) {
|
|
|
|
// The downstream graphics stack expects an attenuated input, hence why the
|
|
// attenuation parameter is set.
|
|
DebugOnly<int> err = libyuv::I420AlphaToARGB(y_buf, ya_pitch,
|
|
u_buf, uv_pitch,
|
|
v_buf, uv_pitch,
|
|
a_buf, ya_pitch,
|
|
argb_buf, argb_pitch,
|
|
pic_width, pic_height, 1);
|
|
MOZ_ASSERT(!err);
|
|
}
|
|
|
|
} // namespace gfx
|
|
} // namespace mozilla
|