2 Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
22 /** @file src/image.cc
23 * @brief A class to describe a video image.
27 #include "compose.hpp"
28 #include "dcpomatic_assert.h"
29 #include "dcpomatic_socket.h"
30 #include "enum_indexed_vector.h"
31 #include "exceptions.h"
33 #include "maths_util.h"
34 #include "memory_util.h"
37 #include <dcp/rgb_xyz.h>
38 #include <dcp/transfer_function.h>
39 #include <dcp/warnings.h>
40 LIBDCP_DISABLE_WARNINGS
42 #include <libavutil/frame.h>
43 #include <libavutil/pixdesc.h>
44 #include <libavutil/pixfmt.h>
45 #include <libswscale/swscale.h>
47 LIBDCP_ENABLE_WARNINGS
48 #if HAVE_VALGRIND_MEMCHECK_H
49 #include <valgrind/memcheck.h>
60 using std::make_shared;
63 using std::runtime_error;
64 using std::shared_ptr;
69 /** The memory alignment, in bytes, used for each row of an image if Alignment::PADDED is requested */
70 int constexpr ALIGNMENT = 64;
72 /* U/V black value for 8-bit colour */
73 static uint8_t const eight_bit_uv = (1 << 7) - 1;
74 /* U/V black value for 9-bit colour */
75 static uint16_t const nine_bit_uv = (1 << 8) - 1;
76 /* U/V black value for 10-bit colour */
77 static uint16_t const ten_bit_uv = (1 << 9) - 1;
78 /* U/V black value for 16-bit colour */
79 static uint16_t const sixteen_bit_uv = (1 << 15) - 1;
83 Image::vertical_factor (int n) const
89 auto d = av_pix_fmt_desc_get(_pixel_format);
91 throw PixelFormatError ("line_factor()", _pixel_format);
94 return lrintf(powf(2.0f, d->log2_chroma_h));
98 Image::horizontal_factor (int n) const
104 auto d = av_pix_fmt_desc_get(_pixel_format);
106 throw PixelFormatError ("sample_size()", _pixel_format);
109 return lrintf(powf(2.0f, d->log2_chroma_w));
113 /** @param n Component index.
114 * @return Number of samples (i.e. pixels, unless sub-sampled) in each direction for this component.
117 Image::sample_size (int n) const
120 lrint (ceil(static_cast<double>(size().width) / horizontal_factor(n))),
121 lrint (ceil(static_cast<double>(size().height) / vertical_factor(n)))
126 /** @return Number of planes */
128 Image::planes () const
130 if (_pixel_format == AV_PIX_FMT_PAL8) {
134 auto d = av_pix_fmt_desc_get(_pixel_format);
136 throw PixelFormatError ("planes()", _pixel_format);
139 if ((d->flags & AV_PIX_FMT_FLAG_PLANAR) == 0) {
143 return d->nb_components;
149 round_width_for_subsampling (int p, AVPixFmtDescriptor const * desc)
151 return p & ~ ((1 << desc->log2_chroma_w) - 1);
157 round_height_for_subsampling (int p, AVPixFmtDescriptor const * desc)
159 return p & ~ ((1 << desc->log2_chroma_h) - 1);
163 /** Crop this image, scale it to `inter_size' and then place it in a black frame of `out_size'.
164 * @param crop Amount to crop by.
165 * @param inter_size Size to scale the cropped image to.
166 * @param out_size Size of output frame; if this is larger than inter_size there will be black padding.
167 * @param yuv_to_rgb YUV to RGB transformation to use, if required.
168 * @param video_range Video range of the image.
169 * @param out_format Output pixel format.
170 * @param out_aligned true to make the output image aligned.
171 * @param out_video_range Video range to use for the output image.
172 * @param fast Try to be fast at the possible expense of quality; at present this means using
173 * fast bilinear rather than bicubic scaling.
176 Image::crop_scale_window (
178 dcp::Size inter_size,
180 dcp::YUVToRGB yuv_to_rgb,
181 VideoRange video_range,
182 AVPixelFormat out_format,
183 VideoRange out_video_range,
184 Alignment out_alignment,
188 /* Empirical testing suggests that sws_scale() will crash if
189 the input image is not padded.
191 DCPOMATIC_ASSERT (alignment() == Alignment::PADDED);
193 DCPOMATIC_ASSERT (out_size.width >= inter_size.width);
194 DCPOMATIC_ASSERT (out_size.height >= inter_size.height);
196 auto out = make_shared<Image>(out_format, out_size, out_alignment);
199 auto in_desc = av_pix_fmt_desc_get (_pixel_format);
201 throw PixelFormatError ("crop_scale_window()", _pixel_format);
204 /* Round down so that we crop only the number of pixels that is straightforward
205 * considering any subsampling.
208 round_width_for_subsampling(crop.left, in_desc),
209 round_width_for_subsampling(crop.right, in_desc),
210 round_height_for_subsampling(crop.top, in_desc),
211 round_height_for_subsampling(crop.bottom, in_desc)
214 /* Also check that we aren't cropping more image than there actually is */
215 if ((corrected_crop.left + corrected_crop.right) >= (size().width - 4)) {
216 corrected_crop.left = 0;
217 corrected_crop.right = size().width - 4;
220 if ((corrected_crop.top + corrected_crop.bottom) >= (size().height - 4)) {
221 corrected_crop.top = 0;
222 corrected_crop.bottom = size().height - 4;
225 /* Size of the image after any crop */
226 auto const cropped_size = corrected_crop.apply (size());
228 /* Scale context for a scale from cropped_size to inter_size */
229 auto scale_context = sws_getContext (
230 cropped_size.width, cropped_size.height, pixel_format(),
231 inter_size.width, inter_size.height, out_format,
232 fast ? SWS_FAST_BILINEAR : SWS_BICUBIC, 0, 0, 0
235 if (!scale_context) {
236 throw runtime_error (N_("Could not allocate SwsContext"));
239 DCPOMATIC_ASSERT (yuv_to_rgb < dcp::YUVToRGB::COUNT);
240 EnumIndexedVector<int, dcp::YUVToRGB> lut;
241 lut[dcp::YUVToRGB::REC601] = SWS_CS_ITU601;
242 lut[dcp::YUVToRGB::REC709] = SWS_CS_ITU709;
243 lut[dcp::YUVToRGB::REC2020] = SWS_CS_BT2020;
245 /* The 3rd parameter here is:
246 0 -> source range MPEG (i.e. "video", 16-235)
247 1 -> source range JPEG (i.e. "full", 0-255)
249 0 -> destination range MPEG (i.e. "video", 16-235)
250 1 -> destination range JPEG (i.e. "full", 0-255)
252 But remember: sws_setColorspaceDetails ignores these
253 parameters unless the both source and destination images
254 are isYUV or isGray. (If either is not, it uses video range).
256 sws_setColorspaceDetails (
258 sws_getCoefficients(lut[yuv_to_rgb]), video_range == VideoRange::VIDEO ? 0 : 1,
259 sws_getCoefficients(lut[yuv_to_rgb]), out_video_range == VideoRange::VIDEO ? 0 : 1,
263 /* Prepare input data pointers with crop */
264 uint8_t* scale_in_data[planes()];
265 for (int c = 0; c < planes(); ++c) {
266 int const x = lrintf(bytes_per_pixel(c) * corrected_crop.left);
267 scale_in_data[c] = data()[c] + x + stride()[c] * (corrected_crop.top / vertical_factor(c));
270 auto out_desc = av_pix_fmt_desc_get (out_format);
272 throw PixelFormatError ("crop_scale_window()", out_format);
275 /* Corner of the image within out_size */
276 Position<int> const corner (
277 round_width_for_subsampling((out_size.width - inter_size.width) / 2, out_desc),
278 round_height_for_subsampling((out_size.height - inter_size.height) / 2, out_desc)
281 uint8_t* scale_out_data[out->planes()];
282 for (int c = 0; c < out->planes(); ++c) {
283 int const x = lrintf(out->bytes_per_pixel(c) * corner.x);
284 scale_out_data[c] = out->data()[c] + x + out->stride()[c] * (corner.y / out->vertical_factor(c));
289 scale_in_data, stride(),
290 0, cropped_size.height,
291 scale_out_data, out->stride()
294 sws_freeContext (scale_context);
296 /* There are some cases where there will be unwanted image data left in the image at this point:
298 * 1. When we are cropping without any scaling or pixel format conversion.
299 * 2. When we are scaling to certain sizes and placing the result into a larger
302 * Clear out the sides of the image to take care of those cases.
304 auto const pad = (out_size.width - inter_size.width) / 2;
305 out->make_part_black(0, pad);
306 out->make_part_black(corner.x + inter_size.width, pad);
309 video_range == VideoRange::VIDEO &&
310 out_video_range == VideoRange::FULL &&
311 av_pix_fmt_desc_get(_pixel_format)->flags & AV_PIX_FMT_FLAG_RGB
313 /* libswscale will not convert video range for RGB sources, so we have to do it ourselves */
314 out->video_range_to_full_range ();
322 Image::convert_pixel_format (dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, Alignment out_alignment, bool fast) const
324 return scale(size(), yuv_to_rgb, out_format, out_alignment, fast);
328 /** @param out_size Size to scale to.
329 * @param yuv_to_rgb YUVToRGB transform transform to use, if required.
330 * @param out_format Output pixel format.
331 * @param out_alignment Output alignment.
332 * @param fast Try to be fast at the possible expense of quality; at present this means using
333 * fast bilinear rather than bicubic scaling.
336 Image::scale (dcp::Size out_size, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, Alignment out_alignment, bool fast) const
338 /* Empirical testing suggests that sws_scale() will crash if
339 the input image alignment is not PADDED.
341 DCPOMATIC_ASSERT (alignment() == Alignment::PADDED);
343 auto scaled = make_shared<Image>(out_format, out_size, out_alignment);
344 auto scale_context = sws_getContext (
345 size().width, size().height, pixel_format(),
346 out_size.width, out_size.height, out_format,
347 (fast ? SWS_FAST_BILINEAR : SWS_BICUBIC) | SWS_ACCURATE_RND, 0, 0, 0
350 DCPOMATIC_ASSERT (yuv_to_rgb < dcp::YUVToRGB::COUNT);
351 EnumIndexedVector<int, dcp::YUVToRGB> lut;
352 lut[dcp::YUVToRGB::REC601] = SWS_CS_ITU601;
353 lut[dcp::YUVToRGB::REC709] = SWS_CS_ITU709;
354 lut[dcp::YUVToRGB::REC2020] = SWS_CS_BT2020;
356 /* The 3rd parameter here is:
357 0 -> source range MPEG (i.e. "video", 16-235)
358 1 -> source range JPEG (i.e. "full", 0-255)
360 0 -> destination range MPEG (i.e. "video", 16-235)
361 1 -> destination range JPEG (i.e. "full", 0-255)
363 But remember: sws_setColorspaceDetails ignores these
364 parameters unless the corresponding image isYUV or isGray.
365 (If it's neither, it uses video range).
367 sws_setColorspaceDetails (
369 sws_getCoefficients(lut[yuv_to_rgb]), 0,
370 sws_getCoefficients(lut[yuv_to_rgb]), 0,
378 scaled->data(), scaled->stride()
381 sws_freeContext (scale_context);
387 /** Blacken a YUV image whose bits per pixel is rounded up to 16 */
389 Image::yuv_16_black (uint16_t v, bool alpha)
391 memset (data()[0], 0, sample_size(0).height * stride()[0]);
392 for (int i = 1; i < 3; ++i) {
393 auto p = reinterpret_cast<int16_t*> (data()[i]);
394 int const lines = sample_size(i).height;
395 for (int y = 0; y < lines; ++y) {
396 /* We divide by 2 here because we are writing 2 bytes at a time */
397 for (int x = 0; x < line_size()[i] / 2; ++x) {
400 p += stride()[i] / 2;
405 memset (data()[3], 0, sample_size(3).height * stride()[3]);
411 Image::swap_16 (uint16_t v)
413 return ((v >> 8) & 0xff) | ((v & 0xff) << 8);
418 Image::make_part_black (int const start, int const width)
420 auto y_part = [&]() {
421 int const bpp = bytes_per_pixel(0);
422 int const h = sample_size(0).height;
423 int const s = stride()[0];
425 for (int y = 0; y < h; ++y) {
426 memset (p + start * bpp, 0, width * bpp);
431 switch (_pixel_format) {
432 case AV_PIX_FMT_RGB24:
433 case AV_PIX_FMT_ARGB:
434 case AV_PIX_FMT_RGBA:
435 case AV_PIX_FMT_ABGR:
436 case AV_PIX_FMT_BGRA:
437 case AV_PIX_FMT_RGB555LE:
438 case AV_PIX_FMT_RGB48LE:
439 case AV_PIX_FMT_RGB48BE:
440 case AV_PIX_FMT_XYZ12LE:
442 int const h = sample_size(0).height;
443 int const bpp = bytes_per_pixel(0);
444 int const s = stride()[0];
445 uint8_t* p = data()[0];
446 for (int y = 0; y < h; y++) {
447 memset (p + start * bpp, 0, width * bpp);
452 case AV_PIX_FMT_YUV420P:
455 for (int i = 1; i < 3; ++i) {
457 int const h = sample_size(i).height;
458 for (int y = 0; y < h; ++y) {
459 for (int x = start / 2; x < (start + width) / 2; ++x) {
467 case AV_PIX_FMT_YUV422P10LE:
470 for (int i = 1; i < 3; ++i) {
471 auto p = reinterpret_cast<int16_t*>(data()[i]);
472 int const h = sample_size(i).height;
473 for (int y = 0; y < h; ++y) {
474 for (int x = start / 2; x < (start + width) / 2; ++x) {
477 p += stride()[i] / 2;
482 case AV_PIX_FMT_YUV444P10LE:
485 for (int i = 1; i < 3; ++i) {
486 auto p = reinterpret_cast<int16_t*>(data()[i]);
487 int const h = sample_size(i).height;
488 for (int y = 0; y < h; ++y) {
489 for (int x = start; x < (start + width); ++x) {
492 p += stride()[i] / 2;
498 throw PixelFormatError ("make_part_black()", _pixel_format);
506 switch (_pixel_format) {
507 case AV_PIX_FMT_YUV420P:
508 case AV_PIX_FMT_YUV422P:
509 case AV_PIX_FMT_YUV444P:
510 case AV_PIX_FMT_YUV411P:
511 memset (data()[0], 0, sample_size(0).height * stride()[0]);
512 memset (data()[1], eight_bit_uv, sample_size(1).height * stride()[1]);
513 memset (data()[2], eight_bit_uv, sample_size(2).height * stride()[2]);
516 case AV_PIX_FMT_YUVJ420P:
517 case AV_PIX_FMT_YUVJ422P:
518 case AV_PIX_FMT_YUVJ444P:
519 memset (data()[0], 0, sample_size(0).height * stride()[0]);
520 memset (data()[1], eight_bit_uv + 1, sample_size(1).height * stride()[1]);
521 memset (data()[2], eight_bit_uv + 1, sample_size(2).height * stride()[2]);
524 case AV_PIX_FMT_YUV422P9LE:
525 case AV_PIX_FMT_YUV444P9LE:
526 yuv_16_black (nine_bit_uv, false);
529 case AV_PIX_FMT_YUV422P9BE:
530 case AV_PIX_FMT_YUV444P9BE:
531 yuv_16_black (swap_16 (nine_bit_uv), false);
534 case AV_PIX_FMT_YUV422P10LE:
535 case AV_PIX_FMT_YUV444P10LE:
536 yuv_16_black (ten_bit_uv, false);
539 case AV_PIX_FMT_YUV422P16LE:
540 case AV_PIX_FMT_YUV444P16LE:
541 yuv_16_black (sixteen_bit_uv, false);
544 case AV_PIX_FMT_YUV444P10BE:
545 case AV_PIX_FMT_YUV422P10BE:
546 yuv_16_black (swap_16 (ten_bit_uv), false);
549 case AV_PIX_FMT_YUVA420P9BE:
550 case AV_PIX_FMT_YUVA422P9BE:
551 case AV_PIX_FMT_YUVA444P9BE:
552 yuv_16_black (swap_16 (nine_bit_uv), true);
555 case AV_PIX_FMT_YUVA420P9LE:
556 case AV_PIX_FMT_YUVA422P9LE:
557 case AV_PIX_FMT_YUVA444P9LE:
558 yuv_16_black (nine_bit_uv, true);
561 case AV_PIX_FMT_YUVA420P10BE:
562 case AV_PIX_FMT_YUVA422P10BE:
563 case AV_PIX_FMT_YUVA444P10BE:
564 yuv_16_black (swap_16 (ten_bit_uv), true);
567 case AV_PIX_FMT_YUVA420P10LE:
568 case AV_PIX_FMT_YUVA422P10LE:
569 case AV_PIX_FMT_YUVA444P10LE:
570 yuv_16_black (ten_bit_uv, true);
573 case AV_PIX_FMT_YUVA420P16BE:
574 case AV_PIX_FMT_YUVA422P16BE:
575 case AV_PIX_FMT_YUVA444P16BE:
576 yuv_16_black (swap_16 (sixteen_bit_uv), true);
579 case AV_PIX_FMT_YUVA420P16LE:
580 case AV_PIX_FMT_YUVA422P16LE:
581 case AV_PIX_FMT_YUVA444P16LE:
582 yuv_16_black (sixteen_bit_uv, true);
585 case AV_PIX_FMT_RGB24:
586 case AV_PIX_FMT_ARGB:
587 case AV_PIX_FMT_RGBA:
588 case AV_PIX_FMT_ABGR:
589 case AV_PIX_FMT_BGRA:
590 case AV_PIX_FMT_RGB555LE:
591 case AV_PIX_FMT_RGB48LE:
592 case AV_PIX_FMT_RGB48BE:
593 case AV_PIX_FMT_XYZ12LE:
594 memset (data()[0], 0, sample_size(0).height * stride()[0]);
597 case AV_PIX_FMT_UYVY422:
599 int const Y = sample_size(0).height;
600 int const X = line_size()[0];
601 uint8_t* p = data()[0];
602 for (int y = 0; y < Y; ++y) {
603 for (int x = 0; x < X / 4; ++x) {
604 *p++ = eight_bit_uv; // Cb
606 *p++ = eight_bit_uv; // Cr
614 throw PixelFormatError ("make_black()", _pixel_format);
620 Image::make_transparent ()
622 if (_pixel_format != AV_PIX_FMT_BGRA && _pixel_format != AV_PIX_FMT_RGBA && _pixel_format != AV_PIX_FMT_RGBA64BE) {
623 throw PixelFormatError ("make_transparent()", _pixel_format);
626 memset (data()[0], 0, sample_size(0).height * stride()[0]);
635 uint8_t* const* data;
639 uint8_t* line_pointer(int y) const {
640 return data[0] + y * stride[0] + start_x * bpp;
645 /** Parameters of the other image (the one being blended onto the target) when target and other are RGB */
646 struct OtherRGBParams
651 uint8_t* const* data;
655 uint8_t* line_pointer(int y) const {
656 return data[0] + y * stride[0];
659 float alpha_divisor() const {
660 return pow(2, bpp * 2) - 1;
665 /** Parameters of the other image (the one being blended onto the target) when target and other are YUV */
666 struct OtherYUVParams
671 uint8_t* const* data;
674 uint8_t* const* alpha_data;
675 int const* alpha_stride;
679 template <class OtherType>
681 alpha_blend_onto_rgb24(TargetParams const& target, OtherRGBParams const& other, int red, int blue, std::function<float (OtherType*)> get, int value_divisor)
683 /* Going onto RGB24. First byte is red, second green, third blue */
684 auto const alpha_divisor = other.alpha_divisor();
685 for (int ty = target.start_y, oy = other.start_y; ty < target.size.height && oy < other.size.height; ++ty, ++oy) {
686 auto tp = target.line_pointer(ty);
687 auto op = reinterpret_cast<OtherType*>(other.line_pointer(oy));
688 for (int tx = target.start_x, ox = other.start_x; tx < target.size.width && ox < other.size.width; ++tx, ++ox) {
689 float const alpha = get(op + 3) / alpha_divisor;
690 tp[0] = (get(op + red) / value_divisor) * alpha + tp[0] * (1 - alpha);
691 tp[1] = (get(op + 1) / value_divisor) * alpha + tp[1] * (1 - alpha);
692 tp[2] = (get(op + blue) / value_divisor) * alpha + tp[2] * (1 - alpha);
695 op += other.bpp / sizeof(OtherType);
701 template <class OtherType>
703 alpha_blend_onto_bgra(TargetParams const& target, OtherRGBParams const& other, int red, int blue, std::function<float (OtherType*)> get, int value_divisor)
705 auto const alpha_divisor = other.alpha_divisor();
706 for (int ty = target.start_y, oy = other.start_y; ty < target.size.height && oy < other.size.height; ++ty, ++oy) {
707 auto tp = target.line_pointer(ty);
708 auto op = reinterpret_cast<OtherType*>(other.line_pointer(oy));
709 for (int tx = target.start_x, ox = other.start_x; tx < target.size.width && ox < other.size.width; ++tx, ++ox) {
710 float const alpha = get(op + 3) / alpha_divisor;
711 tp[0] = (get(op + blue) / value_divisor) * alpha + tp[0] * (1 - alpha);
712 tp[1] = (get(op + 1) / value_divisor) * alpha + tp[1] * (1 - alpha);
713 tp[2] = (get(op + red) / value_divisor) * alpha + tp[2] * (1 - alpha);
714 tp[3] = (get(op + 3) / value_divisor) * alpha + tp[3] * (1 - alpha);
717 op += other.bpp / sizeof(OtherType);
723 template <class OtherType>
725 alpha_blend_onto_rgba(TargetParams const& target, OtherRGBParams const& other, int red, int blue, std::function<float (OtherType*)> get, int value_divisor)
727 auto const alpha_divisor = other.alpha_divisor();
728 for (int ty = target.start_y, oy = other.start_y; ty < target.size.height && oy < other.size.height; ++ty, ++oy) {
729 auto tp = target.line_pointer(ty);
730 auto op = reinterpret_cast<OtherType*>(other.line_pointer(oy));
731 for (int tx = target.start_x, ox = other.start_x; tx < target.size.width && ox < other.size.width; ++tx, ++ox) {
732 float const alpha = get(op + 3) / alpha_divisor;
733 tp[0] = (get(op + red) / value_divisor) * alpha + tp[0] * (1 - alpha);
734 tp[1] = (get(op + 1) / value_divisor) * alpha + tp[1] * (1 - alpha);
735 tp[2] = (get(op + blue) / value_divisor) * alpha + tp[2] * (1 - alpha);
736 tp[3] = (get(op + 3) / value_divisor) * alpha + tp[3] * (1 - alpha);
739 op += other.bpp / sizeof(OtherType);
745 template <class OtherType>
747 alpha_blend_onto_rgb48le(TargetParams const& target, OtherRGBParams const& other, int red, int blue, std::function<float (OtherType*)> get, int value_scale)
749 auto const alpha_divisor = other.alpha_divisor();
750 for (int ty = target.start_y, oy = other.start_y; ty < target.size.height && oy < other.size.height; ++ty, ++oy) {
751 auto tp = reinterpret_cast<uint16_t*>(target.line_pointer(ty));
752 auto op = reinterpret_cast<OtherType*>(other.line_pointer(oy));
753 for (int tx = target.start_x, ox = other.start_x; tx < target.size.width && ox < other.size.width; ++tx, ++ox) {
754 float const alpha = get(op + 3) / alpha_divisor;
755 tp[0] = get(op + red) * value_scale * alpha + tp[0] * (1 - alpha);
756 tp[1] = get(op + 1) * value_scale * alpha + tp[1] * (1 - alpha);
757 tp[2] = get(op + blue) * value_scale * alpha + tp[2] * (1 - alpha);
759 tp += target.bpp / 2;
760 op += other.bpp / sizeof(OtherType);
766 template <class OtherType>
768 alpha_blend_onto_xyz12le(TargetParams const& target, OtherRGBParams const& other, int red, int blue, std::function<float (OtherType*)> get, int value_divisor)
770 auto const alpha_divisor = other.alpha_divisor();
771 auto conv = dcp::ColourConversion::srgb_to_xyz();
772 double fast_matrix[9];
773 dcp::combined_rgb_to_xyz(conv, fast_matrix);
774 auto lut_in = conv.in()->double_lut(0, 1, 8, false);
775 auto lut_out = conv.out()->int_lut(0, 1, 16, true, 65535);
776 for (int ty = target.start_y, oy = other.start_y; ty < target.size.height && oy < other.size.height; ++ty, ++oy) {
777 auto tp = reinterpret_cast<uint16_t*>(target.data[0] + ty * target.stride[0] + target.start_x * target.bpp);
778 auto op = reinterpret_cast<OtherType*>(other.data[0] + oy * other.stride[0]);
779 for (int tx = target.start_x, ox = other.start_x; tx < target.size.width && ox < other.size.width; ++tx, ++ox) {
780 float const alpha = get(op + 3) / alpha_divisor;
782 /* Convert sRGB to XYZ; op is BGRA. First, input gamma LUT */
783 double const r = lut_in[get(op + red) / value_divisor];
784 double const g = lut_in[get(op + 1) / value_divisor];
785 double const b = lut_in[get(op + blue) / value_divisor];
787 /* RGB to XYZ, including Bradford transform and DCI companding */
788 double const x = max(0.0, min(1.0, r * fast_matrix[0] + g * fast_matrix[1] + b * fast_matrix[2]));
789 double const y = max(0.0, min(1.0, r * fast_matrix[3] + g * fast_matrix[4] + b * fast_matrix[5]));
790 double const z = max(0.0, min(1.0, r * fast_matrix[6] + g * fast_matrix[7] + b * fast_matrix[8]));
792 /* Out gamma LUT and blend */
793 tp[0] = lut_out[lrint(x * 65535)] * alpha + tp[0] * (1 - alpha);
794 tp[1] = lut_out[lrint(y * 65535)] * alpha + tp[1] * (1 - alpha);
795 tp[2] = lut_out[lrint(z * 65535)] * alpha + tp[2] * (1 - alpha);
797 tp += target.bpp / 2;
798 op += other.bpp / sizeof(OtherType);
806 alpha_blend_onto_yuv420p(TargetParams const& target, OtherYUVParams const& other)
808 auto const ts = target.size;
809 auto const os = other.size;
810 for (int ty = target.start_y, oy = other.start_y; ty < ts.height && oy < os.height; ++ty, ++oy) {
811 int const hty = ty / 2;
812 int const hoy = oy / 2;
813 uint8_t* tY = target.data[0] + (ty * target.stride[0]) + target.start_x;
814 uint8_t* tU = target.data[1] + (hty * target.stride[1]) + target.start_x / 2;
815 uint8_t* tV = target.data[2] + (hty * target.stride[2]) + target.start_x / 2;
816 uint8_t* oY = other.data[0] + (oy * other.stride[0]) + other.start_x;
817 uint8_t* oU = other.data[1] + (hoy * other.stride[1]) + other.start_x / 2;
818 uint8_t* oV = other.data[2] + (hoy * other.stride[2]) + other.start_x / 2;
819 uint8_t* alpha = other.alpha_data[0] + (oy * other.alpha_stride[0]) + other.start_x * 4;
820 for (int tx = target.start_x, ox = other.start_x; tx < ts.width && ox < os.width; ++tx, ++ox) {
821 float const a = float(alpha[3]) / 255;
822 *tY = *oY * a + *tY * (1 - a);
823 *tU = *oU * a + *tU * (1 - a);
824 *tV = *oV * a + *tV * (1 - a);
843 alpha_blend_onto_yuv420p10(TargetParams const& target, OtherYUVParams const& other)
845 auto const ts = target.size;
846 auto const os = other.size;
847 for (int ty = target.start_y, oy = other.start_y; ty < ts.height && oy < os.height; ++ty, ++oy) {
848 int const hty = ty / 2;
849 int const hoy = oy / 2;
850 uint16_t* tY = reinterpret_cast<uint16_t*>(target.data[0] + (ty * target.stride[0])) + target.start_x;
851 uint16_t* tU = reinterpret_cast<uint16_t*>(target.data[1] + (hty * target.stride[1])) + target.start_x / 2;
852 uint16_t* tV = reinterpret_cast<uint16_t*>(target.data[2] + (hty * target.stride[2])) + target.start_x / 2;
853 uint16_t* oY = reinterpret_cast<uint16_t*>(other.data[0] + (oy * other.stride[0])) + other.start_x;
854 uint16_t* oU = reinterpret_cast<uint16_t*>(other.data[1] + (hoy * other.stride[1])) + other.start_x / 2;
855 uint16_t* oV = reinterpret_cast<uint16_t*>(other.data[2] + (hoy * other.stride[2])) + other.start_x / 2;
856 uint8_t* alpha = other.alpha_data[0] + (oy * other.alpha_stride[0]) + other.start_x * 4;
857 for (int tx = target.start_x, ox = other.start_x; tx < ts.width && ox < os.width; ++tx, ++ox) {
858 float const a = float(alpha[3]) / 255;
859 *tY = *oY * a + *tY * (1 - a);
860 *tU = *oU * a + *tU * (1 - a);
861 *tV = *oV * a + *tV * (1 - a);
880 alpha_blend_onto_yuv422p9or10le(TargetParams const& target, OtherYUVParams const& other)
882 auto const ts = target.size;
883 auto const os = other.size;
884 for (int ty = target.start_y, oy = other.start_y; ty < ts.height && oy < os.height; ++ty, ++oy) {
885 uint16_t* tY = reinterpret_cast<uint16_t*>(target.data[0] + (ty * target.stride[0])) + target.start_x;
886 uint16_t* tU = reinterpret_cast<uint16_t*>(target.data[1] + (ty * target.stride[1])) + target.start_x / 2;
887 uint16_t* tV = reinterpret_cast<uint16_t*>(target.data[2] + (ty * target.stride[2])) + target.start_x / 2;
888 uint16_t* oY = reinterpret_cast<uint16_t*>(other.data[0] + (oy * other.stride[0])) + other.start_x;
889 uint16_t* oU = reinterpret_cast<uint16_t*>(other.data[1] + (oy * other.stride[1])) + other.start_x / 2;
890 uint16_t* oV = reinterpret_cast<uint16_t*>(other.data[2] + (oy * other.stride[2])) + other.start_x / 2;
891 uint8_t* alpha = other.alpha_data[0] + (oy * other.alpha_stride[0]) + other.start_x * 4;
892 for (int tx = target.start_x, ox = other.start_x; tx < ts.width && ox < os.width; ++tx, ++ox) {
893 float const a = float(alpha[3]) / 255;
894 *tY = *oY * a + *tY * (1 - a);
895 *tU = *oU * a + *tU * (1 - a);
896 *tV = *oV * a + *tV * (1 - a);
914 Image::alpha_blend (shared_ptr<const Image> other, Position<int> position)
917 other->pixel_format() == AV_PIX_FMT_BGRA ||
918 other->pixel_format() == AV_PIX_FMT_RGBA ||
919 other->pixel_format() == AV_PIX_FMT_RGBA64BE
922 int const blue = other->pixel_format() == AV_PIX_FMT_BGRA ? 0 : 2;
923 int const red = other->pixel_format() == AV_PIX_FMT_BGRA ? 2 : 0;
925 int start_tx = position.x;
929 start_ox = -start_tx;
933 int start_ty = position.y;
937 start_oy = -start_ty;
941 TargetParams target_params = {
950 OtherRGBParams other_rgb_params = {
956 other->pixel_format() == AV_PIX_FMT_RGBA64BE ? 8 : 4
959 OtherYUVParams other_yuv_params = {
969 auto byteswap = [](uint16_t* p) {
970 return (*p >> 8) | ((*p & 0xff) << 8);
973 auto pass = [](uint8_t* p) {
977 switch (_pixel_format) {
978 case AV_PIX_FMT_RGB24:
979 target_params.bpp = 3;
980 if (other->pixel_format() == AV_PIX_FMT_RGBA64BE) {
981 alpha_blend_onto_rgb24<uint16_t>(target_params, other_rgb_params, red, blue, byteswap, 256);
983 alpha_blend_onto_rgb24<uint8_t>(target_params, other_rgb_params, red, blue, pass, 1);
986 case AV_PIX_FMT_BGRA:
987 target_params.bpp = 4;
988 if (other->pixel_format() == AV_PIX_FMT_RGBA64BE) {
989 alpha_blend_onto_bgra<uint16_t>(target_params, other_rgb_params, red, blue, byteswap, 256);
991 alpha_blend_onto_bgra<uint8_t>(target_params, other_rgb_params, red, blue, pass, 1);
994 case AV_PIX_FMT_RGBA:
995 target_params.bpp = 4;
996 if (other->pixel_format() == AV_PIX_FMT_RGBA64BE) {
997 alpha_blend_onto_rgba<uint16_t>(target_params, other_rgb_params, red, blue, byteswap, 256);
999 alpha_blend_onto_rgba<uint8_t>(target_params, other_rgb_params, red, blue, pass, 1);
1002 case AV_PIX_FMT_RGB48LE:
1003 target_params.bpp = 6;
1004 if (other->pixel_format() == AV_PIX_FMT_RGBA64BE) {
1005 alpha_blend_onto_rgb48le<uint16_t>(target_params, other_rgb_params, red, blue, byteswap, 1);
1007 alpha_blend_onto_rgb48le<uint8_t>(target_params, other_rgb_params, red, blue, pass, 256);
1010 case AV_PIX_FMT_XYZ12LE:
1011 target_params.bpp = 6;
1012 if (other->pixel_format() == AV_PIX_FMT_RGBA64BE) {
1013 alpha_blend_onto_xyz12le<uint16_t>(target_params, other_rgb_params, red, blue, byteswap, 256);
1015 alpha_blend_onto_xyz12le<uint8_t>(target_params, other_rgb_params, red, blue, pass, 1);
1018 case AV_PIX_FMT_YUV420P:
1020 auto yuv = other->convert_pixel_format (dcp::YUVToRGB::REC709, _pixel_format, Alignment::COMPACT, false);
1021 other_yuv_params.data = yuv->data();
1022 other_yuv_params.stride = yuv->stride();
1023 other_yuv_params.alpha_data = other->data();
1024 other_yuv_params.alpha_stride = other->stride();
1025 alpha_blend_onto_yuv420p(target_params, other_yuv_params);
1028 case AV_PIX_FMT_YUV420P10:
1030 auto yuv = other->convert_pixel_format (dcp::YUVToRGB::REC709, _pixel_format, Alignment::COMPACT, false);
1031 other_yuv_params.data = yuv->data();
1032 other_yuv_params.stride = yuv->stride();
1033 other_yuv_params.alpha_data = other->data();
1034 other_yuv_params.alpha_stride = other->stride();
1035 alpha_blend_onto_yuv420p10(target_params, other_yuv_params);
1038 case AV_PIX_FMT_YUV422P9LE:
1039 case AV_PIX_FMT_YUV422P10LE:
1041 auto yuv = other->convert_pixel_format (dcp::YUVToRGB::REC709, _pixel_format, Alignment::COMPACT, false);
1042 other_yuv_params.data = yuv->data();
1043 other_yuv_params.stride = yuv->stride();
1044 alpha_blend_onto_yuv422p9or10le(target_params, other_yuv_params);
1048 throw PixelFormatError ("alpha_blend()", _pixel_format);
1054 Image::copy (shared_ptr<const Image> other, Position<int> position)
1056 /* Only implemented for RGB24 onto RGB24 so far */
1057 DCPOMATIC_ASSERT (_pixel_format == AV_PIX_FMT_RGB24 && other->pixel_format() == AV_PIX_FMT_RGB24);
1058 DCPOMATIC_ASSERT (position.x >= 0 && position.y >= 0);
1060 int const N = min (position.x + other->size().width, size().width) - position.x;
1061 for (int ty = position.y, oy = 0; ty < size().height && oy < other->size().height; ++ty, ++oy) {
1062 uint8_t * const tp = data()[0] + ty * stride()[0] + position.x * 3;
1063 uint8_t * const op = other->data()[0] + oy * other->stride()[0];
1064 memcpy (tp, op, N * 3);
1070 Image::read_from_socket (shared_ptr<Socket> socket)
1072 for (int i = 0; i < planes(); ++i) {
1073 uint8_t* p = data()[i];
1074 int const lines = sample_size(i).height;
1075 for (int y = 0; y < lines; ++y) {
1076 socket->read (p, line_size()[i]);
1084 Image::write_to_socket (shared_ptr<Socket> socket) const
1086 for (int i = 0; i < planes(); ++i) {
1087 uint8_t* p = data()[i];
1088 int const lines = sample_size(i).height;
1089 for (int y = 0; y < lines; ++y) {
1090 socket->write (p, line_size()[i]);
1098 Image::bytes_per_pixel (int c) const
1100 auto d = av_pix_fmt_desc_get(_pixel_format);
1102 throw PixelFormatError ("bytes_per_pixel()", _pixel_format);
1105 if (c >= planes()) {
1109 float bpp[4] = { 0, 0, 0, 0 };
1111 #ifdef DCPOMATIC_HAVE_AVCOMPONENTDESCRIPTOR_DEPTH_MINUS1
1112 bpp[0] = floor ((d->comp[0].depth_minus1 + 8) / 8);
1113 if (d->nb_components > 1) {
1114 bpp[1] = floor ((d->comp[1].depth_minus1 + 8) / 8) / pow (2.0f, d->log2_chroma_w);
1116 if (d->nb_components > 2) {
1117 bpp[2] = floor ((d->comp[2].depth_minus1 + 8) / 8) / pow (2.0f, d->log2_chroma_w);
1119 if (d->nb_components > 3) {
1120 bpp[3] = floor ((d->comp[3].depth_minus1 + 8) / 8) / pow (2.0f, d->log2_chroma_w);
1123 bpp[0] = floor ((d->comp[0].depth + 7) / 8);
1124 if (d->nb_components > 1) {
1125 bpp[1] = floor ((d->comp[1].depth + 7) / 8) / pow (2.0f, d->log2_chroma_w);
1127 if (d->nb_components > 2) {
1128 bpp[2] = floor ((d->comp[2].depth + 7) / 8) / pow (2.0f, d->log2_chroma_w);
1130 if (d->nb_components > 3) {
1131 bpp[3] = floor ((d->comp[3].depth + 7) / 8) / pow (2.0f, d->log2_chroma_w);
1135 if ((d->flags & AV_PIX_FMT_FLAG_PLANAR) == 0) {
1136 /* Not planar; sum them up */
1137 return bpp[0] + bpp[1] + bpp[2] + bpp[3];
1144 /** Construct a Image of a given size and format, allocating memory
1147 * @param p Pixel format.
1148 * @param s Size in pixels.
1149 * @param alignment PADDED to make each row of this image aligned to a ALIGNMENT-byte boundary, otherwise COMPACT.
1151 Image::Image (AVPixelFormat p, dcp::Size s, Alignment alignment)
1154 , _alignment (alignment)
1163 _data = (uint8_t **) wrapped_av_malloc (4 * sizeof (uint8_t *));
1164 _data[0] = _data[1] = _data[2] = _data[3] = 0;
1166 _line_size = (int *) wrapped_av_malloc (4 * sizeof (int));
1167 _line_size[0] = _line_size[1] = _line_size[2] = _line_size[3] = 0;
1169 _stride = (int *) wrapped_av_malloc (4 * sizeof (int));
1170 _stride[0] = _stride[1] = _stride[2] = _stride[3] = 0;
1172 auto stride_round_up = [](int stride, int t) {
1173 int const a = stride + (t - 1);
1177 for (int i = 0; i < planes(); ++i) {
1178 _line_size[i] = ceil (_size.width * bytes_per_pixel(i));
1179 _stride[i] = stride_round_up (_line_size[i], _alignment == Alignment::PADDED ? ALIGNMENT : 1);
1181 /* The assembler function ff_rgb24ToY_avx (in libswscale/x86/input.asm)
1182 uses a 16-byte fetch to read three bytes (R/G/B) of image data.
1183 Hence on the last pixel of the last line it reads over the end of
1184 the actual data by 1 byte. If the width of an image is a multiple
1185 of the stride alignment there will be no padding at the end of image lines.
1186 OS X crashes on this illegal read, though other operating systems don't
1187 seem to mind. The nasty + 1 in this malloc makes sure there is always a byte
1188 for that instruction to read safely.
1190 Further to the above, valgrind is now telling me that ff_rgb24ToY_ssse3
1191 over-reads by more then _avx. I can't follow the code to work out how much,
1192 so I'll just over-allocate by ALIGNMENT bytes and have done with it. Empirical
1193 testing suggests that it works.
1195 In addition to these concerns, we may read/write as much as a whole extra line
1196 at the end of each plane in cases where we are messing with offsets in order to
1197 do pad or crop. To solve this we over-allocate by an extra _stride[i] bytes.
1199 As an example: we may write to images starting at an offset so we get some padding.
1200 Hence we want to write in the following pattern:
1202 block start write start line end
1203 |..(padding)..|<------line-size------------->|..(padding)..|
1204 |..(padding)..|<------line-size------------->|..(padding)..|
1205 |..(padding)..|<------line-size------------->|..(padding)..|
1207 where line-size is of the smaller (inter_size) image and the full padded line length is that of
1208 out_size. To get things to work we have to tell FFmpeg that the stride is that of out_size.
1209 However some parts of FFmpeg (notably rgb48Toxyz12 in swscale.c) process data for the full
1210 specified *stride*. This does not matter until we get to the last line:
1212 block start write start line end
1213 |..(padding)..|<------line-size------------->|XXXwrittenXXX|
1214 |XXXwrittenXXX|<------line-size------------->|XXXwrittenXXX|
1215 |XXXwrittenXXX|<------line-size------------->|XXXwrittenXXXXXXwrittenXXX
1218 _data[i] = (uint8_t *) wrapped_av_malloc (_stride[i] * (sample_size(i).height + 1) + ALIGNMENT);
1219 #if HAVE_VALGRIND_MEMCHECK_H
1220 /* The data between the end of the line size and the stride is undefined but processed by
1221 libswscale, causing lots of valgrind errors. Mark it all defined to quell these errors.
1223 VALGRIND_MAKE_MEM_DEFINED (_data[i], _stride[i] * (sample_size(i).height + 1) + ALIGNMENT);
1229 Image::Image (Image const & other)
1230 : std::enable_shared_from_this<Image>(other)
1231 , _size (other._size)
1232 , _pixel_format (other._pixel_format)
1233 , _alignment (other._alignment)
1237 for (int i = 0; i < planes(); ++i) {
1238 uint8_t* p = _data[i];
1239 uint8_t* q = other._data[i];
1240 int const lines = sample_size(i).height;
1241 for (int j = 0; j < lines; ++j) {
1242 memcpy (p, q, _line_size[i]);
1244 q += other.stride()[i];
1250 Image::Image (AVFrame const * frame, Alignment alignment)
1251 : _size (frame->width, frame->height)
1252 , _pixel_format (static_cast<AVPixelFormat>(frame->format))
1253 , _alignment (alignment)
1255 DCPOMATIC_ASSERT (_pixel_format != AV_PIX_FMT_NONE);
1259 for (int i = 0; i < planes(); ++i) {
1260 uint8_t* p = _data[i];
1261 uint8_t* q = frame->data[i];
1262 int const lines = sample_size(i).height;
1263 for (int j = 0; j < lines; ++j) {
1264 memcpy (p, q, _line_size[i]);
1266 /* AVFrame's linesize is what we call `stride' */
1267 q += frame->linesize[i];
1273 Image::Image (shared_ptr<const Image> other, Alignment alignment)
1274 : _size (other->_size)
1275 , _pixel_format (other->_pixel_format)
1276 , _alignment (alignment)
1280 for (int i = 0; i < planes(); ++i) {
1281 DCPOMATIC_ASSERT (line_size()[i] == other->line_size()[i]);
1282 uint8_t* p = _data[i];
1283 uint8_t* q = other->data()[i];
1284 int const lines = sample_size(i).height;
1285 for (int j = 0; j < lines; ++j) {
1286 memcpy (p, q, line_size()[i]);
1288 q += other->stride()[i];
1295 Image::operator= (Image const & other)
1297 if (this == &other) {
1308 Image::swap (Image & other)
1310 std::swap (_size, other._size);
1311 std::swap (_pixel_format, other._pixel_format);
1313 for (int i = 0; i < 4; ++i) {
1314 std::swap (_data[i], other._data[i]);
1315 std::swap (_line_size[i], other._line_size[i]);
1316 std::swap (_stride[i], other._stride[i]);
1319 std::swap (_alignment, other._alignment);
1325 for (int i = 0; i < planes(); ++i) {
1330 av_free (_line_size);
1336 Image::data () const
1343 Image::line_size () const
1350 Image::stride () const
1357 Image::size () const
1364 Image::alignment () const
1371 merge (list<PositionImage> images, Image::Alignment alignment)
1373 if (images.empty ()) {
1377 if (images.size() == 1) {
1378 images.front().image = Image::ensure_alignment(images.front().image, alignment);
1379 return images.front();
1382 dcpomatic::Rect<int> all (images.front().position, images.front().image->size().width, images.front().image->size().height);
1383 for (auto const& i: images) {
1384 all.extend (dcpomatic::Rect<int>(i.position, i.image->size().width, i.image->size().height));
1387 auto merged = make_shared<Image>(images.front().image->pixel_format(), dcp::Size(all.width, all.height), alignment);
1388 merged->make_transparent ();
1389 for (auto const& i: images) {
1390 merged->alpha_blend (i.image, i.position - all.position());
1393 return PositionImage (merged, all.position ());
1398 operator== (Image const & a, Image const & b)
1400 if (a.planes() != b.planes() || a.pixel_format() != b.pixel_format() || a.alignment() != b.alignment()) {
1404 for (int c = 0; c < a.planes(); ++c) {
1405 if (a.sample_size(c).height != b.sample_size(c).height || a.line_size()[c] != b.line_size()[c] || a.stride()[c] != b.stride()[c]) {
1409 uint8_t* p = a.data()[c];
1410 uint8_t* q = b.data()[c];
1411 int const lines = a.sample_size(c).height;
1412 for (int y = 0; y < lines; ++y) {
1413 if (memcmp (p, q, a.line_size()[c]) != 0) {
1427 * @param f Amount to fade by; 0 is black, 1 is no fade.
1430 Image::fade (float f)
1432 /* U/V black value for 8-bit colour */
1433 static int const eight_bit_uv = (1 << 7) - 1;
1434 /* U/V black value for 10-bit colour */
1435 static uint16_t const ten_bit_uv = (1 << 9) - 1;
1437 switch (_pixel_format) {
1438 case AV_PIX_FMT_YUV420P:
1441 uint8_t* p = data()[0];
1442 int const lines = sample_size(0).height;
1443 for (int y = 0; y < lines; ++y) {
1445 for (int x = 0; x < line_size()[0]; ++x) {
1446 *q = int(float(*q) * f);
1453 for (int c = 1; c < 3; ++c) {
1454 uint8_t* p = data()[c];
1455 int const lines = sample_size(c).height;
1456 for (int y = 0; y < lines; ++y) {
1458 for (int x = 0; x < line_size()[c]; ++x) {
1459 *q = eight_bit_uv + int((int(*q) - eight_bit_uv) * f);
1469 case AV_PIX_FMT_RGB24:
1472 uint8_t* p = data()[0];
1473 int const lines = sample_size(0).height;
1474 for (int y = 0; y < lines; ++y) {
1476 for (int x = 0; x < line_size()[0]; ++x) {
1477 *q = int (float (*q) * f);
1485 case AV_PIX_FMT_XYZ12LE:
1486 case AV_PIX_FMT_RGB48LE:
1487 /* 16-bit little-endian */
1488 for (int c = 0; c < 3; ++c) {
1489 int const stride_pixels = stride()[c] / 2;
1490 int const line_size_pixels = line_size()[c] / 2;
1491 uint16_t* p = reinterpret_cast<uint16_t*> (data()[c]);
1492 int const lines = sample_size(c).height;
1493 for (int y = 0; y < lines; ++y) {
1495 for (int x = 0; x < line_size_pixels; ++x) {
1496 *q = int (float (*q) * f);
1504 case AV_PIX_FMT_YUV422P10LE:
1508 int const stride_pixels = stride()[0] / 2;
1509 int const line_size_pixels = line_size()[0] / 2;
1510 uint16_t* p = reinterpret_cast<uint16_t*> (data()[0]);
1511 int const lines = sample_size(0).height;
1512 for (int y = 0; y < lines; ++y) {
1514 for (int x = 0; x < line_size_pixels; ++x) {
1515 *q = int(float(*q) * f);
1523 for (int c = 1; c < 3; ++c) {
1524 int const stride_pixels = stride()[c] / 2;
1525 int const line_size_pixels = line_size()[c] / 2;
1526 uint16_t* p = reinterpret_cast<uint16_t*> (data()[c]);
1527 int const lines = sample_size(c).height;
1528 for (int y = 0; y < lines; ++y) {
1530 for (int x = 0; x < line_size_pixels; ++x) {
1531 *q = ten_bit_uv + int((int(*q) - ten_bit_uv) * f);
1542 throw PixelFormatError ("fade()", _pixel_format);
1547 shared_ptr<const Image>
1548 Image::ensure_alignment (shared_ptr<const Image> image, Image::Alignment alignment)
1550 if (image->alignment() == alignment) {
1554 return make_shared<Image>(image, alignment);
1559 Image::memory_used () const
1562 for (int i = 0; i < planes(); ++i) {
1563 m += _stride[i] * sample_size(i).height;
1570 Image::video_range_to_full_range ()
1572 switch (_pixel_format) {
1573 case AV_PIX_FMT_RGB24:
1575 float const factor = 256.0 / 219.0;
1576 uint8_t* p = data()[0];
1577 int const lines = sample_size(0).height;
1578 for (int y = 0; y < lines; ++y) {
1580 for (int x = 0; x < line_size()[0]; ++x) {
1581 *q = clamp(lrintf((*q - 16) * factor), 0L, 255L);
1588 case AV_PIX_FMT_RGB48LE:
1590 float const factor = 65536.0 / 56064.0;
1591 uint16_t* p = reinterpret_cast<uint16_t*>(data()[0]);
1592 int const lines = sample_size(0).height;
1593 for (int y = 0; y < lines; ++y) {
1595 int const line_size_pixels = line_size()[0] / 2;
1596 for (int x = 0; x < line_size_pixels; ++x) {
1597 *q = clamp(lrintf((*q - 4096) * factor), 0L, 65535L);
1600 p += stride()[0] / 2;
1604 case AV_PIX_FMT_GBRP12LE:
1606 float const factor = 4096.0 / 3504.0;
1607 for (int c = 0; c < 3; ++c) {
1608 uint16_t* p = reinterpret_cast<uint16_t*>(data()[c]);
1609 int const lines = sample_size(c).height;
1610 for (int y = 0; y < lines; ++y) {
1612 int const line_size_pixels = line_size()[c] / 2;
1613 for (int x = 0; x < line_size_pixels; ++x) {
1614 *q = clamp(lrintf((*q - 256) * factor), 0L, 4095L);
1622 throw PixelFormatError ("video_range_to_full_range()", _pixel_format);