X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fimage.cc;h=71a3a5bccd9b174b5ffea94f7eecbac250265952;hb=a306df9145d16046e51e8b7ff5222e341e98fdbd;hp=49cb20a613565fdca2cd927d6de85b94b14c1093;hpb=e5eec6c5e7b96cc6e7697bbf42d3f27546c5ad52;p=dcpomatic.git diff --git a/src/lib/image.cc b/src/lib/image.cc index 49cb20a61..71a3a5bcc 100644 --- a/src/lib/image.cc +++ b/src/lib/image.cc @@ -1,19 +1,20 @@ /* - Copyright (C) 2012-2015 Carl Hetherington + Copyright (C) 2012-2016 Carl Hetherington - This program is free software; you can redistribute it and/or modify + This file is part of DCP-o-matic. + + DCP-o-matic is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. - This program is distributed in the hope that it will be useful, + DCP-o-matic is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + along with DCP-o-matic. If not, see . */ @@ -26,7 +27,6 @@ #include "timer.h" #include "rect.h" #include "util.h" -#include "md5_digester.h" #include "dcpomatic_socket.h" extern "C" { #include @@ -110,10 +110,13 @@ Image::planes () const return d->nb_components; } -/** Crop this image, scale it to `inter_size' and then place it in a black frame of `out_size' */ +/** Crop this image, scale it to `inter_size' and then place it in a black frame of `out_size'. + * @param fast Try to be fast at the possible expense of quality; at present this means using + * fast bilinear rather than bicubic scaling. + */ shared_ptr Image::crop_scale_window ( - Crop crop, dcp::Size inter_size, dcp::Size out_size, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, bool out_aligned + Crop crop, dcp::Size inter_size, dcp::Size out_size, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, bool out_aligned, bool fast ) const { /* Empirical testing suggests that sws_scale() will crash if @@ -156,7 +159,7 @@ Image::crop_scale_window ( struct SwsContext* scale_context = sws_getContext ( cropped_size.width, cropped_size.height, pixel_format(), inter_size.width, inter_size.height, out_format, - SWS_BICUBIC, 0, 0, 0 + fast ? SWS_FAST_BILINEAR : SWS_BICUBIC, 0, 0, 0 ); if (!scale_context) { @@ -213,8 +216,11 @@ Image::crop_scale_window ( return out; } +/** @param fast Try to be fast at the possible expense of quality; at present this means using + * fast bilinear rather than bicubic scaling. + */ shared_ptr -Image::scale (dcp::Size out_size, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, bool out_aligned) const +Image::scale (dcp::Size out_size, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, bool out_aligned, bool fast) const { /* Empirical testing suggests that sws_scale() will crash if the input image is not aligned. @@ -226,7 +232,7 @@ Image::scale (dcp::Size out_size, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_fo struct SwsContext* scale_context = sws_getContext ( size().width, size().height, pixel_format(), out_size.width, out_size.height, out_format, - SWS_BICUBIC, 0, 0, 0 + fast ? SWS_FAST_BILINEAR : SWS_BICUBIC, 0, 0, 0 ); DCPOMATIC_ASSERT (yuv_to_rgb < dcp::YUV_TO_RGB_COUNT); @@ -419,6 +425,7 @@ Image::make_transparent () void Image::alpha_blend (shared_ptr other, Position position) { + /* We're blending RGBA images; first byte is blue, second byte is green, third byte blue, fourth byte alpha */ DCPOMATIC_ASSERT (other->pixel_format() == AV_PIX_FMT_RGBA); int const other_bpp = 4; @@ -441,15 +448,16 @@ Image::alpha_blend (shared_ptr other, Position position) switch (_pixel_format) { case AV_PIX_FMT_RGB24: { + /* Going onto RGB24. First byte is red, second green, third blue */ int const this_bpp = 3; for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) { uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp; uint8_t* op = other->data()[0] + oy * other->stride()[0]; for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) { float const alpha = float (op[3]) / 255; - tp[0] = op[0] * alpha + tp[0] * (1 - alpha); + tp[0] = op[2] * alpha + tp[0] * (1 - alpha); tp[1] = op[1] * alpha + tp[1] * (1 - alpha); - tp[2] = op[2] * alpha + tp[2] * (1 - alpha); + tp[2] = op[0] * alpha + tp[2] * (1 - alpha); tp += this_bpp; op += other_bpp; @@ -498,6 +506,7 @@ Image::alpha_blend (shared_ptr other, Position position) } case AV_PIX_FMT_XYZ12LE: { + boost::numeric::ublas::matrix matrix = dcp::ColourConversion::srgb_to_xyz().rgb_to_xyz(); int const this_bpp = 6; for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) { uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp; @@ -506,9 +515,9 @@ Image::alpha_blend (shared_ptr other, Position position) float const alpha = float (op[3]) / 255; /* Convert sRGB to XYZ; op is BGRA */ - int const x = 0.4124564 + op[2] + 0.3575761 * op[1] + 0.1804375 * op[0]; - int const y = 0.2126729 + op[2] + 0.7151522 * op[1] + 0.0721750 * op[0]; - int const z = 0.0193339 + op[2] + 0.1191920 * op[1] + 0.9503041 * op[0]; + int const x = matrix(0, 0) * op[2] + matrix(0, 1) * op[1] + matrix(0, 2) * op[0]; + int const y = matrix(1, 0) * op[2] + matrix(1, 1) * op[1] + matrix(1, 2) * op[0]; + int const z = matrix(2, 0) * op[2] + matrix(2, 1) * op[1] + matrix(2, 2) * op[0]; /* Blend high bytes */ tp[1] = min (x, 255) * alpha + tp[1] * (1 - alpha);