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;
680 template <class OtherType>
682 alpha_blend_onto_rgb24(TargetParams const& target, OtherRGBParams const& other, int red, int blue, std::function<float (OtherType*)> get, int value_divisor)
684 /* Going onto RGB24. First byte is red, second green, third blue */
685 auto const alpha_divisor = other.alpha_divisor();
686 for (int ty = target.start_y, oy = other.start_y; ty < target.size.height && oy < other.size.height; ++ty, ++oy) {
687 auto tp = target.line_pointer(ty);
688 auto op = reinterpret_cast<OtherType*>(other.line_pointer(oy));
689 for (int tx = target.start_x, ox = other.start_x; tx < target.size.width && ox < other.size.width; ++tx, ++ox) {
690 float const alpha = get(op + 3) / alpha_divisor;
691 tp[0] = (get(op + red) / value_divisor) * alpha + tp[0] * (1 - alpha);
692 tp[1] = (get(op + 1) / value_divisor) * alpha + tp[1] * (1 - alpha);
693 tp[2] = (get(op + blue) / value_divisor) * alpha + tp[2] * (1 - alpha);
696 op += other.bpp / sizeof(OtherType);
702 template <class OtherType>
704 alpha_blend_onto_bgra(TargetParams const& target, OtherRGBParams const& other, int red, int blue, std::function<float (OtherType*)> get, int value_divisor)
706 auto const alpha_divisor = other.alpha_divisor();
707 for (int ty = target.start_y, oy = other.start_y; ty < target.size.height && oy < other.size.height; ++ty, ++oy) {
708 auto tp = target.line_pointer(ty);
709 auto op = reinterpret_cast<OtherType*>(other.line_pointer(oy));
710 for (int tx = target.start_x, ox = other.start_x; tx < target.size.width && ox < other.size.width; ++tx, ++ox) {
711 float const alpha = get(op + 3) / alpha_divisor;
712 tp[0] = (get(op + blue) / value_divisor) * alpha + tp[0] * (1 - alpha);
713 tp[1] = (get(op + 1) / value_divisor) * alpha + tp[1] * (1 - alpha);
714 tp[2] = (get(op + red) / value_divisor) * alpha + tp[2] * (1 - alpha);
715 tp[3] = (get(op + 3) / value_divisor) * alpha + tp[3] * (1 - alpha);
718 op += other.bpp / sizeof(OtherType);
724 template <class OtherType>
726 alpha_blend_onto_rgba(TargetParams const& target, OtherRGBParams const& other, int red, int blue, std::function<float (OtherType*)> get, int value_divisor)
728 auto const alpha_divisor = other.alpha_divisor();
729 for (int ty = target.start_y, oy = other.start_y; ty < target.size.height && oy < other.size.height; ++ty, ++oy) {
730 auto tp = target.line_pointer(ty);
731 auto op = reinterpret_cast<OtherType*>(other.line_pointer(oy));
732 for (int tx = target.start_x, ox = other.start_x; tx < target.size.width && ox < other.size.width; ++tx, ++ox) {
733 float const alpha = get(op + 3) / alpha_divisor;
734 tp[0] = (get(op + red) / value_divisor) * alpha + tp[0] * (1 - alpha);
735 tp[1] = (get(op + 1) / value_divisor) * alpha + tp[1] * (1 - alpha);
736 tp[2] = (get(op + blue) / value_divisor) * alpha + tp[2] * (1 - alpha);
737 tp[3] = (get(op + 3) / value_divisor) * alpha + tp[3] * (1 - alpha);
740 op += other.bpp / sizeof(OtherType);
746 template <class OtherType>
748 alpha_blend_onto_rgb48le(TargetParams const& target, OtherRGBParams const& other, int red, int blue, std::function<float (OtherType*)> get, int value_scale)
750 auto const alpha_divisor = other.alpha_divisor();
751 for (int ty = target.start_y, oy = other.start_y; ty < target.size.height && oy < other.size.height; ++ty, ++oy) {
752 auto tp = reinterpret_cast<uint16_t*>(target.line_pointer(ty));
753 auto op = reinterpret_cast<OtherType*>(other.line_pointer(oy));
754 for (int tx = target.start_x, ox = other.start_x; tx < target.size.width && ox < other.size.width; ++tx, ++ox) {
755 float const alpha = get(op + 3) / alpha_divisor;
756 tp[0] = get(op + red) * value_scale * alpha + tp[0] * (1 - alpha);
757 tp[1] = get(op + 1) * value_scale * alpha + tp[1] * (1 - alpha);
758 tp[2] = get(op + blue) * value_scale * alpha + tp[2] * (1 - alpha);
760 tp += target.bpp / 2;
761 op += other.bpp / sizeof(OtherType);
767 template <class OtherType>
769 alpha_blend_onto_xyz12le(TargetParams const& target, OtherRGBParams const& other, int red, int blue, std::function<float (OtherType*)> get, int value_divisor)
771 auto const alpha_divisor = other.alpha_divisor();
772 auto conv = dcp::ColourConversion::srgb_to_xyz();
773 double fast_matrix[9];
774 dcp::combined_rgb_to_xyz(conv, fast_matrix);
775 auto lut_in = conv.in()->double_lut(0, 1, 8, false);
776 auto lut_out = conv.out()->int_lut(0, 1, 16, true, 65535);
777 for (int ty = target.start_y, oy = other.start_y; ty < target.size.height && oy < other.size.height; ++ty, ++oy) {
778 auto tp = reinterpret_cast<uint16_t*>(target.data[0] + ty * target.stride[0] + target.start_x * target.bpp);
779 auto op = reinterpret_cast<OtherType*>(other.data[0] + oy * other.stride[0]);
780 for (int tx = target.start_x, ox = other.start_x; tx < target.size.width && ox < other.size.width; ++tx, ++ox) {
781 float const alpha = get(op + 3) / alpha_divisor;
783 /* Convert sRGB to XYZ; op is BGRA. First, input gamma LUT */
784 double const r = lut_in[get(op + red) / value_divisor];
785 double const g = lut_in[get(op + 1) / value_divisor];
786 double const b = lut_in[get(op + blue) / value_divisor];
788 /* RGB to XYZ, including Bradford transform and DCI companding */
789 double const x = max(0.0, min(1.0, r * fast_matrix[0] + g * fast_matrix[1] + b * fast_matrix[2]));
790 double const y = max(0.0, min(1.0, r * fast_matrix[3] + g * fast_matrix[4] + b * fast_matrix[5]));
791 double const z = max(0.0, min(1.0, r * fast_matrix[6] + g * fast_matrix[7] + b * fast_matrix[8]));
793 /* Out gamma LUT and blend */
794 tp[0] = lut_out[lrint(x * 65535)] * alpha + tp[0] * (1 - alpha);
795 tp[1] = lut_out[lrint(y * 65535)] * alpha + tp[1] * (1 - alpha);
796 tp[2] = lut_out[lrint(z * 65535)] * alpha + tp[2] * (1 - alpha);
798 tp += target.bpp / 2;
799 op += other.bpp / sizeof(OtherType);
807 alpha_blend_onto_yuv420p(TargetParams const& target, OtherYUVParams const& other, std::function<float (uint8_t* data)> get_alpha)
809 auto const ts = target.size;
810 auto const os = other.size;
811 for (int ty = target.start_y, oy = other.start_y; ty < ts.height && oy < os.height; ++ty, ++oy) {
812 int const hty = ty / 2;
813 int const hoy = oy / 2;
814 uint8_t* tY = target.data[0] + (ty * target.stride[0]) + target.start_x;
815 uint8_t* tU = target.data[1] + (hty * target.stride[1]) + target.start_x / 2;
816 uint8_t* tV = target.data[2] + (hty * target.stride[2]) + target.start_x / 2;
817 uint8_t* oY = other.data[0] + (oy * other.stride[0]) + other.start_x;
818 uint8_t* oU = other.data[1] + (hoy * other.stride[1]) + other.start_x / 2;
819 uint8_t* oV = other.data[2] + (hoy * other.stride[2]) + other.start_x / 2;
820 uint8_t* alpha = other.alpha_data[0] + (oy * other.alpha_stride[0]) + other.start_x * other.alpha_bpp;
821 for (int tx = target.start_x, ox = other.start_x; tx < ts.width && ox < os.width; ++tx, ++ox) {
822 float const a = get_alpha(alpha);
823 *tY = *oY * a + *tY * (1 - a);
824 *tU = *oU * a + *tU * (1 - a);
825 *tV = *oV * a + *tV * (1 - a);
836 alpha += other.alpha_bpp;
844 alpha_blend_onto_yuv420p10(TargetParams const& target, OtherYUVParams const& other, std::function<float (uint8_t* data)> get_alpha)
846 auto const ts = target.size;
847 auto const os = other.size;
848 for (int ty = target.start_y, oy = other.start_y; ty < ts.height && oy < os.height; ++ty, ++oy) {
849 int const hty = ty / 2;
850 int const hoy = oy / 2;
851 uint16_t* tY = reinterpret_cast<uint16_t*>(target.data[0] + (ty * target.stride[0])) + target.start_x;
852 uint16_t* tU = reinterpret_cast<uint16_t*>(target.data[1] + (hty * target.stride[1])) + target.start_x / 2;
853 uint16_t* tV = reinterpret_cast<uint16_t*>(target.data[2] + (hty * target.stride[2])) + target.start_x / 2;
854 uint16_t* oY = reinterpret_cast<uint16_t*>(other.data[0] + (oy * other.stride[0])) + other.start_x;
855 uint16_t* oU = reinterpret_cast<uint16_t*>(other.data[1] + (hoy * other.stride[1])) + other.start_x / 2;
856 uint16_t* oV = reinterpret_cast<uint16_t*>(other.data[2] + (hoy * other.stride[2])) + other.start_x / 2;
857 uint8_t* alpha = other.alpha_data[0] + (oy * other.alpha_stride[0]) + other.start_x * other.alpha_bpp;
858 for (int tx = target.start_x, ox = other.start_x; tx < ts.width && ox < os.width; ++tx, ++ox) {
859 float const a = get_alpha(alpha);
860 *tY = *oY * a + *tY * (1 - a);
861 *tU = *oU * a + *tU * (1 - a);
862 *tV = *oV * a + *tV * (1 - a);
873 alpha += other.alpha_bpp;
881 alpha_blend_onto_yuv422p9or10le(TargetParams const& target, OtherYUVParams const& other, std::function<float (uint8_t* data)> get_alpha)
883 auto const ts = target.size;
884 auto const os = other.size;
885 for (int ty = target.start_y, oy = other.start_y; ty < ts.height && oy < os.height; ++ty, ++oy) {
886 uint16_t* tY = reinterpret_cast<uint16_t*>(target.data[0] + (ty * target.stride[0])) + target.start_x;
887 uint16_t* tU = reinterpret_cast<uint16_t*>(target.data[1] + (ty * target.stride[1])) + target.start_x / 2;
888 uint16_t* tV = reinterpret_cast<uint16_t*>(target.data[2] + (ty * target.stride[2])) + target.start_x / 2;
889 uint16_t* oY = reinterpret_cast<uint16_t*>(other.data[0] + (oy * other.stride[0])) + other.start_x;
890 uint16_t* oU = reinterpret_cast<uint16_t*>(other.data[1] + (oy * other.stride[1])) + other.start_x / 2;
891 uint16_t* oV = reinterpret_cast<uint16_t*>(other.data[2] + (oy * other.stride[2])) + other.start_x / 2;
892 uint8_t* alpha = other.alpha_data[0] + (oy * other.alpha_stride[0]) + other.start_x * other.alpha_bpp;
893 for (int tx = target.start_x, ox = other.start_x; tx < ts.width && ox < os.width; ++tx, ++ox) {
894 float const a = get_alpha(alpha);
895 *tY = *oY * a + *tY * (1 - a);
896 *tU = *oU * a + *tU * (1 - a);
897 *tV = *oV * a + *tV * (1 - a);
908 alpha += other.alpha_bpp;
915 Image::alpha_blend (shared_ptr<const Image> other, Position<int> position)
918 other->pixel_format() == AV_PIX_FMT_BGRA ||
919 other->pixel_format() == AV_PIX_FMT_RGBA ||
920 other->pixel_format() == AV_PIX_FMT_RGBA64BE
923 int const blue = other->pixel_format() == AV_PIX_FMT_BGRA ? 0 : 2;
924 int const red = other->pixel_format() == AV_PIX_FMT_BGRA ? 2 : 0;
926 int start_tx = position.x;
930 start_ox = -start_tx;
934 int start_ty = position.y;
938 start_oy = -start_ty;
942 TargetParams target_params = {
951 OtherRGBParams other_rgb_params = {
957 other->pixel_format() == AV_PIX_FMT_RGBA64BE ? 8 : 4
960 OtherYUVParams other_yuv_params = {
968 other->pixel_format() == AV_PIX_FMT_RGBA64BE ? 8 : 4
971 auto byteswap = [](uint16_t* p) {
972 return (*p >> 8) | ((*p & 0xff) << 8);
975 auto pass = [](uint8_t* p) {
979 auto get_alpha_64be = [](uint8_t* p) {
980 return ((static_cast<int16_t>(p[6]) << 8) | p[7]) / 65535.0f;
983 auto get_alpha_byte = [](uint8_t* p) {
984 return p[3] / 255.0f;
987 switch (_pixel_format) {
988 case AV_PIX_FMT_RGB24:
989 target_params.bpp = 3;
990 if (other->pixel_format() == AV_PIX_FMT_RGBA64BE) {
991 alpha_blend_onto_rgb24<uint16_t>(target_params, other_rgb_params, red, blue, byteswap, 256);
993 alpha_blend_onto_rgb24<uint8_t>(target_params, other_rgb_params, red, blue, pass, 1);
996 case AV_PIX_FMT_BGRA:
997 target_params.bpp = 4;
998 if (other->pixel_format() == AV_PIX_FMT_RGBA64BE) {
999 alpha_blend_onto_bgra<uint16_t>(target_params, other_rgb_params, red, blue, byteswap, 256);
1001 alpha_blend_onto_bgra<uint8_t>(target_params, other_rgb_params, red, blue, pass, 1);
1004 case AV_PIX_FMT_RGBA:
1005 target_params.bpp = 4;
1006 if (other->pixel_format() == AV_PIX_FMT_RGBA64BE) {
1007 alpha_blend_onto_rgba<uint16_t>(target_params, other_rgb_params, red, blue, byteswap, 256);
1009 alpha_blend_onto_rgba<uint8_t>(target_params, other_rgb_params, red, blue, pass, 1);
1012 case AV_PIX_FMT_RGB48LE:
1013 target_params.bpp = 6;
1014 if (other->pixel_format() == AV_PIX_FMT_RGBA64BE) {
1015 alpha_blend_onto_rgb48le<uint16_t>(target_params, other_rgb_params, red, blue, byteswap, 1);
1017 alpha_blend_onto_rgb48le<uint8_t>(target_params, other_rgb_params, red, blue, pass, 256);
1020 case AV_PIX_FMT_XYZ12LE:
1021 target_params.bpp = 6;
1022 if (other->pixel_format() == AV_PIX_FMT_RGBA64BE) {
1023 alpha_blend_onto_xyz12le<uint16_t>(target_params, other_rgb_params, red, blue, byteswap, 256);
1025 alpha_blend_onto_xyz12le<uint8_t>(target_params, other_rgb_params, red, blue, pass, 1);
1028 case AV_PIX_FMT_YUV420P:
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 if (other->pixel_format() == AV_PIX_FMT_RGBA64BE) {
1036 alpha_blend_onto_yuv420p(target_params, other_yuv_params, get_alpha_64be);
1038 alpha_blend_onto_yuv420p(target_params, other_yuv_params, get_alpha_byte);
1042 case AV_PIX_FMT_YUV420P10:
1044 auto yuv = other->convert_pixel_format (dcp::YUVToRGB::REC709, _pixel_format, Alignment::COMPACT, false);
1045 other_yuv_params.data = yuv->data();
1046 other_yuv_params.stride = yuv->stride();
1047 other_yuv_params.alpha_data = other->data();
1048 other_yuv_params.alpha_stride = other->stride();
1049 if (other->pixel_format() == AV_PIX_FMT_RGBA64BE) {
1050 alpha_blend_onto_yuv420p10(target_params, other_yuv_params, get_alpha_64be);
1052 alpha_blend_onto_yuv420p10(target_params, other_yuv_params, get_alpha_byte);
1056 case AV_PIX_FMT_YUV422P9LE:
1057 case AV_PIX_FMT_YUV422P10LE:
1059 auto yuv = other->convert_pixel_format (dcp::YUVToRGB::REC709, _pixel_format, Alignment::COMPACT, false);
1060 other_yuv_params.data = yuv->data();
1061 other_yuv_params.stride = yuv->stride();
1062 other_yuv_params.alpha_data = other->data();
1063 other_yuv_params.alpha_stride = other->stride();
1064 if (other->pixel_format() == AV_PIX_FMT_RGBA64BE) {
1065 alpha_blend_onto_yuv422p9or10le(target_params, other_yuv_params, get_alpha_64be);
1067 alpha_blend_onto_yuv422p9or10le(target_params, other_yuv_params, get_alpha_byte);
1072 throw PixelFormatError ("alpha_blend()", _pixel_format);
1078 Image::copy (shared_ptr<const Image> other, Position<int> position)
1080 /* Only implemented for RGB24 onto RGB24 so far */
1081 DCPOMATIC_ASSERT (_pixel_format == AV_PIX_FMT_RGB24 && other->pixel_format() == AV_PIX_FMT_RGB24);
1082 DCPOMATIC_ASSERT (position.x >= 0 && position.y >= 0);
1084 int const N = min (position.x + other->size().width, size().width) - position.x;
1085 for (int ty = position.y, oy = 0; ty < size().height && oy < other->size().height; ++ty, ++oy) {
1086 uint8_t * const tp = data()[0] + ty * stride()[0] + position.x * 3;
1087 uint8_t * const op = other->data()[0] + oy * other->stride()[0];
1088 memcpy (tp, op, N * 3);
1094 Image::read_from_socket (shared_ptr<Socket> socket)
1096 for (int i = 0; i < planes(); ++i) {
1097 uint8_t* p = data()[i];
1098 int const lines = sample_size(i).height;
1099 for (int y = 0; y < lines; ++y) {
1100 socket->read (p, line_size()[i]);
1108 Image::write_to_socket (shared_ptr<Socket> socket) const
1110 for (int i = 0; i < planes(); ++i) {
1111 uint8_t* p = data()[i];
1112 int const lines = sample_size(i).height;
1113 for (int y = 0; y < lines; ++y) {
1114 socket->write (p, line_size()[i]);
1122 Image::bytes_per_pixel (int c) const
1124 auto d = av_pix_fmt_desc_get(_pixel_format);
1126 throw PixelFormatError ("bytes_per_pixel()", _pixel_format);
1129 if (c >= planes()) {
1133 float bpp[4] = { 0, 0, 0, 0 };
1135 #ifdef DCPOMATIC_HAVE_AVCOMPONENTDESCRIPTOR_DEPTH_MINUS1
1136 bpp[0] = floor ((d->comp[0].depth_minus1 + 8) / 8);
1137 if (d->nb_components > 1) {
1138 bpp[1] = floor ((d->comp[1].depth_minus1 + 8) / 8) / pow (2.0f, d->log2_chroma_w);
1140 if (d->nb_components > 2) {
1141 bpp[2] = floor ((d->comp[2].depth_minus1 + 8) / 8) / pow (2.0f, d->log2_chroma_w);
1143 if (d->nb_components > 3) {
1144 bpp[3] = floor ((d->comp[3].depth_minus1 + 8) / 8) / pow (2.0f, d->log2_chroma_w);
1147 bpp[0] = floor ((d->comp[0].depth + 7) / 8);
1148 if (d->nb_components > 1) {
1149 bpp[1] = floor ((d->comp[1].depth + 7) / 8) / pow (2.0f, d->log2_chroma_w);
1151 if (d->nb_components > 2) {
1152 bpp[2] = floor ((d->comp[2].depth + 7) / 8) / pow (2.0f, d->log2_chroma_w);
1154 if (d->nb_components > 3) {
1155 bpp[3] = floor ((d->comp[3].depth + 7) / 8) / pow (2.0f, d->log2_chroma_w);
1159 if ((d->flags & AV_PIX_FMT_FLAG_PLANAR) == 0) {
1160 /* Not planar; sum them up */
1161 return bpp[0] + bpp[1] + bpp[2] + bpp[3];
1168 /** Construct a Image of a given size and format, allocating memory
1171 * @param p Pixel format.
1172 * @param s Size in pixels.
1173 * @param alignment PADDED to make each row of this image aligned to a ALIGNMENT-byte boundary, otherwise COMPACT.
1175 Image::Image (AVPixelFormat p, dcp::Size s, Alignment alignment)
1178 , _alignment (alignment)
1187 _data = (uint8_t **) wrapped_av_malloc (4 * sizeof (uint8_t *));
1188 _data[0] = _data[1] = _data[2] = _data[3] = 0;
1190 _line_size = (int *) wrapped_av_malloc (4 * sizeof (int));
1191 _line_size[0] = _line_size[1] = _line_size[2] = _line_size[3] = 0;
1193 _stride = (int *) wrapped_av_malloc (4 * sizeof (int));
1194 _stride[0] = _stride[1] = _stride[2] = _stride[3] = 0;
1196 auto stride_round_up = [](int stride, int t) {
1197 int const a = stride + (t - 1);
1201 for (int i = 0; i < planes(); ++i) {
1202 _line_size[i] = ceil (_size.width * bytes_per_pixel(i));
1203 _stride[i] = stride_round_up (_line_size[i], _alignment == Alignment::PADDED ? ALIGNMENT : 1);
1205 /* The assembler function ff_rgb24ToY_avx (in libswscale/x86/input.asm)
1206 uses a 16-byte fetch to read three bytes (R/G/B) of image data.
1207 Hence on the last pixel of the last line it reads over the end of
1208 the actual data by 1 byte. If the width of an image is a multiple
1209 of the stride alignment there will be no padding at the end of image lines.
1210 OS X crashes on this illegal read, though other operating systems don't
1211 seem to mind. The nasty + 1 in this malloc makes sure there is always a byte
1212 for that instruction to read safely.
1214 Further to the above, valgrind is now telling me that ff_rgb24ToY_ssse3
1215 over-reads by more then _avx. I can't follow the code to work out how much,
1216 so I'll just over-allocate by ALIGNMENT bytes and have done with it. Empirical
1217 testing suggests that it works.
1219 In addition to these concerns, we may read/write as much as a whole extra line
1220 at the end of each plane in cases where we are messing with offsets in order to
1221 do pad or crop. To solve this we over-allocate by an extra _stride[i] bytes.
1223 As an example: we may write to images starting at an offset so we get some padding.
1224 Hence we want to write in the following pattern:
1226 block start write start line end
1227 |..(padding)..|<------line-size------------->|..(padding)..|
1228 |..(padding)..|<------line-size------------->|..(padding)..|
1229 |..(padding)..|<------line-size------------->|..(padding)..|
1231 where line-size is of the smaller (inter_size) image and the full padded line length is that of
1232 out_size. To get things to work we have to tell FFmpeg that the stride is that of out_size.
1233 However some parts of FFmpeg (notably rgb48Toxyz12 in swscale.c) process data for the full
1234 specified *stride*. This does not matter until we get to the last line:
1236 block start write start line end
1237 |..(padding)..|<------line-size------------->|XXXwrittenXXX|
1238 |XXXwrittenXXX|<------line-size------------->|XXXwrittenXXX|
1239 |XXXwrittenXXX|<------line-size------------->|XXXwrittenXXXXXXwrittenXXX
1242 _data[i] = (uint8_t *) wrapped_av_malloc (_stride[i] * (sample_size(i).height + 1) + ALIGNMENT);
1243 #if HAVE_VALGRIND_MEMCHECK_H
1244 /* The data between the end of the line size and the stride is undefined but processed by
1245 libswscale, causing lots of valgrind errors. Mark it all defined to quell these errors.
1247 VALGRIND_MAKE_MEM_DEFINED (_data[i], _stride[i] * (sample_size(i).height + 1) + ALIGNMENT);
1253 Image::Image (Image const & other)
1254 : std::enable_shared_from_this<Image>(other)
1255 , _size (other._size)
1256 , _pixel_format (other._pixel_format)
1257 , _alignment (other._alignment)
1261 for (int i = 0; i < planes(); ++i) {
1262 uint8_t* p = _data[i];
1263 uint8_t* q = other._data[i];
1264 int const lines = sample_size(i).height;
1265 for (int j = 0; j < lines; ++j) {
1266 memcpy (p, q, _line_size[i]);
1268 q += other.stride()[i];
1274 Image::Image (AVFrame const * frame, Alignment alignment)
1275 : _size (frame->width, frame->height)
1276 , _pixel_format (static_cast<AVPixelFormat>(frame->format))
1277 , _alignment (alignment)
1279 DCPOMATIC_ASSERT (_pixel_format != AV_PIX_FMT_NONE);
1283 for (int i = 0; i < planes(); ++i) {
1284 uint8_t* p = _data[i];
1285 uint8_t* q = frame->data[i];
1286 int const lines = sample_size(i).height;
1287 for (int j = 0; j < lines; ++j) {
1288 memcpy (p, q, _line_size[i]);
1290 /* AVFrame's linesize is what we call `stride' */
1291 q += frame->linesize[i];
1297 Image::Image (shared_ptr<const Image> other, Alignment alignment)
1298 : _size (other->_size)
1299 , _pixel_format (other->_pixel_format)
1300 , _alignment (alignment)
1304 for (int i = 0; i < planes(); ++i) {
1305 DCPOMATIC_ASSERT (line_size()[i] == other->line_size()[i]);
1306 uint8_t* p = _data[i];
1307 uint8_t* q = other->data()[i];
1308 int const lines = sample_size(i).height;
1309 for (int j = 0; j < lines; ++j) {
1310 memcpy (p, q, line_size()[i]);
1312 q += other->stride()[i];
1319 Image::operator= (Image const & other)
1321 if (this == &other) {
1332 Image::swap (Image & other)
1334 std::swap (_size, other._size);
1335 std::swap (_pixel_format, other._pixel_format);
1337 for (int i = 0; i < 4; ++i) {
1338 std::swap (_data[i], other._data[i]);
1339 std::swap (_line_size[i], other._line_size[i]);
1340 std::swap (_stride[i], other._stride[i]);
1343 std::swap (_alignment, other._alignment);
1349 for (int i = 0; i < planes(); ++i) {
1354 av_free (_line_size);
1360 Image::data () const
1367 Image::line_size () const
1374 Image::stride () const
1381 Image::size () const
1388 Image::alignment () const
1395 merge (list<PositionImage> images, Image::Alignment alignment)
1397 if (images.empty ()) {
1401 if (images.size() == 1) {
1402 images.front().image = Image::ensure_alignment(images.front().image, alignment);
1403 return images.front();
1406 dcpomatic::Rect<int> all (images.front().position, images.front().image->size().width, images.front().image->size().height);
1407 for (auto const& i: images) {
1408 all.extend (dcpomatic::Rect<int>(i.position, i.image->size().width, i.image->size().height));
1411 auto merged = make_shared<Image>(images.front().image->pixel_format(), dcp::Size(all.width, all.height), alignment);
1412 merged->make_transparent ();
1413 for (auto const& i: images) {
1414 merged->alpha_blend (i.image, i.position - all.position());
1417 return PositionImage (merged, all.position ());
1422 operator== (Image const & a, Image const & b)
1424 if (a.planes() != b.planes() || a.pixel_format() != b.pixel_format() || a.alignment() != b.alignment()) {
1428 for (int c = 0; c < a.planes(); ++c) {
1429 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]) {
1433 uint8_t* p = a.data()[c];
1434 uint8_t* q = b.data()[c];
1435 int const lines = a.sample_size(c).height;
1436 for (int y = 0; y < lines; ++y) {
1437 if (memcmp (p, q, a.line_size()[c]) != 0) {
1451 * @param f Amount to fade by; 0 is black, 1 is no fade.
1454 Image::fade (float f)
1456 /* U/V black value for 8-bit colour */
1457 static int const eight_bit_uv = (1 << 7) - 1;
1458 /* U/V black value for 10-bit colour */
1459 static uint16_t const ten_bit_uv = (1 << 9) - 1;
1461 switch (_pixel_format) {
1462 case AV_PIX_FMT_YUV420P:
1465 uint8_t* p = data()[0];
1466 int const lines = sample_size(0).height;
1467 for (int y = 0; y < lines; ++y) {
1469 for (int x = 0; x < line_size()[0]; ++x) {
1470 *q = int(float(*q) * f);
1477 for (int c = 1; c < 3; ++c) {
1478 uint8_t* p = data()[c];
1479 int const lines = sample_size(c).height;
1480 for (int y = 0; y < lines; ++y) {
1482 for (int x = 0; x < line_size()[c]; ++x) {
1483 *q = eight_bit_uv + int((int(*q) - eight_bit_uv) * f);
1493 case AV_PIX_FMT_RGB24:
1496 uint8_t* p = data()[0];
1497 int const lines = sample_size(0).height;
1498 for (int y = 0; y < lines; ++y) {
1500 for (int x = 0; x < line_size()[0]; ++x) {
1501 *q = int (float (*q) * f);
1509 case AV_PIX_FMT_XYZ12LE:
1510 case AV_PIX_FMT_RGB48LE:
1511 /* 16-bit little-endian */
1512 for (int c = 0; c < 3; ++c) {
1513 int const stride_pixels = stride()[c] / 2;
1514 int const line_size_pixels = line_size()[c] / 2;
1515 uint16_t* p = reinterpret_cast<uint16_t*> (data()[c]);
1516 int const lines = sample_size(c).height;
1517 for (int y = 0; y < lines; ++y) {
1519 for (int x = 0; x < line_size_pixels; ++x) {
1520 *q = int (float (*q) * f);
1528 case AV_PIX_FMT_YUV422P10LE:
1532 int const stride_pixels = stride()[0] / 2;
1533 int const line_size_pixels = line_size()[0] / 2;
1534 uint16_t* p = reinterpret_cast<uint16_t*> (data()[0]);
1535 int const lines = sample_size(0).height;
1536 for (int y = 0; y < lines; ++y) {
1538 for (int x = 0; x < line_size_pixels; ++x) {
1539 *q = int(float(*q) * f);
1547 for (int c = 1; c < 3; ++c) {
1548 int const stride_pixels = stride()[c] / 2;
1549 int const line_size_pixels = line_size()[c] / 2;
1550 uint16_t* p = reinterpret_cast<uint16_t*> (data()[c]);
1551 int const lines = sample_size(c).height;
1552 for (int y = 0; y < lines; ++y) {
1554 for (int x = 0; x < line_size_pixels; ++x) {
1555 *q = ten_bit_uv + int((int(*q) - ten_bit_uv) * f);
1566 throw PixelFormatError ("fade()", _pixel_format);
1571 shared_ptr<const Image>
1572 Image::ensure_alignment (shared_ptr<const Image> image, Image::Alignment alignment)
1574 if (image->alignment() == alignment) {
1578 return make_shared<Image>(image, alignment);
1583 Image::memory_used () const
1586 for (int i = 0; i < planes(); ++i) {
1587 m += _stride[i] * sample_size(i).height;
1594 Image::video_range_to_full_range ()
1596 switch (_pixel_format) {
1597 case AV_PIX_FMT_RGB24:
1599 float const factor = 256.0 / 219.0;
1600 uint8_t* p = data()[0];
1601 int const lines = sample_size(0).height;
1602 for (int y = 0; y < lines; ++y) {
1604 for (int x = 0; x < line_size()[0]; ++x) {
1605 *q = clamp(lrintf((*q - 16) * factor), 0L, 255L);
1612 case AV_PIX_FMT_RGB48LE:
1614 float const factor = 65536.0 / 56064.0;
1615 uint16_t* p = reinterpret_cast<uint16_t*>(data()[0]);
1616 int const lines = sample_size(0).height;
1617 for (int y = 0; y < lines; ++y) {
1619 int const line_size_pixels = line_size()[0] / 2;
1620 for (int x = 0; x < line_size_pixels; ++x) {
1621 *q = clamp(lrintf((*q - 4096) * factor), 0L, 65535L);
1624 p += stride()[0] / 2;
1628 case AV_PIX_FMT_GBRP12LE:
1630 float const factor = 4096.0 / 3504.0;
1631 for (int c = 0; c < 3; ++c) {
1632 uint16_t* p = reinterpret_cast<uint16_t*>(data()[c]);
1633 int const lines = sample_size(c).height;
1634 for (int y = 0; y < lines; ++y) {
1636 int const line_size_pixels = line_size()[c] / 2;
1637 for (int x = 0; x < line_size_pixels; ++x) {
1638 *q = clamp(lrintf((*q - 256) * factor), 0L, 4095L);
1646 throw PixelFormatError ("video_range_to_full_range()", _pixel_format);