2 Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 /** @file src/image.cc
21 * @brief A class to describe a video image.
25 #include "exceptions.h"
29 #include "md5_digester.h"
30 #include "dcpomatic_socket.h"
32 #include <libswscale/swscale.h>
33 #include <libavutil/pixfmt.h>
34 #include <libavutil/pixdesc.h>
35 #include <libavutil/frame.h>
46 using std::runtime_error;
47 using boost::shared_ptr;
51 Image::line_factor (int n) const
57 AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
59 throw PixelFormatError ("line_factor()", _pixel_format);
62 return pow (2.0f, d->log2_chroma_h);
65 /** @param n Component index.
66 * @return Number of samples (i.e. pixels, unless sub-sampled) in each direction for this component.
69 Image::sample_size (int n) const
71 int horizontal_factor = 1;
73 AVPixFmtDescriptor const * d = av_pix_fmt_desc_get (_pixel_format);
75 throw PixelFormatError ("sample_size()", _pixel_format);
77 horizontal_factor = pow (2.0f, d->log2_chroma_w);
81 lrint (ceil (static_cast<double>(size().width) / horizontal_factor)),
82 lrint (ceil (static_cast<double>(size().height) / line_factor (n)))
87 Image::components () const
89 AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
91 throw PixelFormatError ("components()", _pixel_format);
94 return d->nb_components;
97 /** @return Number of planes */
99 Image::planes () const
101 AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
103 throw PixelFormatError ("planes()", _pixel_format);
106 if ((d->flags & AV_PIX_FMT_FLAG_PLANAR) == 0) {
110 return d->nb_components;
113 /** Crop this image, scale it to `inter_size' and then place it in a black frame of `out_size' */
115 Image::crop_scale_window (
116 Crop crop, dcp::Size inter_size, dcp::Size out_size, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, bool out_aligned
119 /* Empirical testing suggests that sws_scale() will crash if
120 the input image is not aligned.
122 DCPOMATIC_ASSERT (aligned ());
124 DCPOMATIC_ASSERT (out_size.width >= inter_size.width);
125 DCPOMATIC_ASSERT (out_size.height >= inter_size.height);
127 /* Here's an image of out_size */
128 shared_ptr<Image> out (new Image (out_format, out_size, out_aligned));
131 /* Size of the image after any crop */
132 dcp::Size const cropped_size = crop.apply (size ());
134 /* Scale context for a scale from cropped_size to inter_size */
135 struct SwsContext* scale_context = sws_getContext (
136 cropped_size.width, cropped_size.height, pixel_format(),
137 inter_size.width, inter_size.height, out_format,
141 if (!scale_context) {
142 throw runtime_error (N_("Could not allocate SwsContext"));
145 DCPOMATIC_ASSERT (yuv_to_rgb < dcp::YUV_TO_RGB_COUNT);
146 int const lut[dcp::YUV_TO_RGB_COUNT] = {
151 sws_setColorspaceDetails (
153 sws_getCoefficients (lut[yuv_to_rgb]), 0,
154 sws_getCoefficients (lut[yuv_to_rgb]), 0,
158 AVPixFmtDescriptor const * desc = av_pix_fmt_desc_get (_pixel_format);
160 throw PixelFormatError ("crop_scale_window()", _pixel_format);
163 /* Prepare input data pointers with crop */
164 uint8_t* scale_in_data[planes()];
165 for (int c = 0; c < planes(); ++c) {
166 /* To work out the crop in bytes, start by multiplying
167 the crop by the (average) bytes per pixel. Then
168 round down so that we don't crop a subsampled pixel until
169 we've cropped all of its Y-channel pixels.
171 int const x = lrintf (bytes_per_pixel(c) * crop.left) & ~ ((int) desc->log2_chroma_w);
172 scale_in_data[c] = data()[c] + x + stride()[c] * (crop.top / line_factor(c));
175 /* Corner of the image within out_size */
176 Position<int> const corner ((out_size.width - inter_size.width) / 2, (out_size.height - inter_size.height) / 2);
178 uint8_t* scale_out_data[out->planes()];
179 for (int c = 0; c < out->planes(); ++c) {
180 scale_out_data[c] = out->data()[c] + lrintf (out->bytes_per_pixel(c) * corner.x) + out->stride()[c] * corner.y;
185 scale_in_data, stride(),
186 0, cropped_size.height,
187 scale_out_data, out->stride()
190 sws_freeContext (scale_context);
196 Image::scale (dcp::Size out_size, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, bool out_aligned) const
198 /* Empirical testing suggests that sws_scale() will crash if
199 the input image is not aligned.
201 DCPOMATIC_ASSERT (aligned ());
203 shared_ptr<Image> scaled (new Image (out_format, out_size, out_aligned));
205 struct SwsContext* scale_context = sws_getContext (
206 size().width, size().height, pixel_format(),
207 out_size.width, out_size.height, out_format,
211 DCPOMATIC_ASSERT (yuv_to_rgb < dcp::YUV_TO_RGB_COUNT);
212 int const lut[dcp::YUV_TO_RGB_COUNT] = {
217 sws_setColorspaceDetails (
219 sws_getCoefficients (lut[yuv_to_rgb]), 0,
220 sws_getCoefficients (lut[yuv_to_rgb]), 0,
228 scaled->data(), scaled->stride()
231 sws_freeContext (scale_context);
236 /** Blacken a YUV image whose bits per pixel is rounded up to 16 */
238 Image::yuv_16_black (uint16_t v, bool alpha)
240 memset (data()[0], 0, sample_size(0).height * stride()[0]);
241 for (int i = 1; i < 3; ++i) {
242 int16_t* p = reinterpret_cast<int16_t*> (data()[i]);
243 int const lines = sample_size(i).height;
244 for (int y = 0; y < lines; ++y) {
245 /* We divide by 2 here because we are writing 2 bytes at a time */
246 for (int x = 0; x < line_size()[i] / 2; ++x) {
249 p += stride()[i] / 2;
254 memset (data()[3], 0, sample_size(3).height * stride()[3]);
259 Image::swap_16 (uint16_t v)
261 return ((v >> 8) & 0xff) | ((v & 0xff) << 8);
267 /* U/V black value for 8-bit colour */
268 static uint8_t const eight_bit_uv = (1 << 7) - 1;
269 /* U/V black value for 9-bit colour */
270 static uint16_t const nine_bit_uv = (1 << 8) - 1;
271 /* U/V black value for 10-bit colour */
272 static uint16_t const ten_bit_uv = (1 << 9) - 1;
273 /* U/V black value for 16-bit colour */
274 static uint16_t const sixteen_bit_uv = (1 << 15) - 1;
276 switch (_pixel_format) {
277 case AV_PIX_FMT_YUV420P:
278 case AV_PIX_FMT_YUV422P:
279 case AV_PIX_FMT_YUV444P:
280 case AV_PIX_FMT_YUV411P:
281 memset (data()[0], 0, sample_size(0).height * stride()[0]);
282 memset (data()[1], eight_bit_uv, sample_size(1).height * stride()[1]);
283 memset (data()[2], eight_bit_uv, sample_size(2).height * stride()[2]);
286 case AV_PIX_FMT_YUVJ420P:
287 case AV_PIX_FMT_YUVJ422P:
288 case AV_PIX_FMT_YUVJ444P:
289 memset (data()[0], 0, sample_size(0).height * stride()[0]);
290 memset (data()[1], eight_bit_uv + 1, sample_size(1).height * stride()[1]);
291 memset (data()[2], eight_bit_uv + 1, sample_size(2).height * stride()[2]);
294 case AV_PIX_FMT_YUV422P9LE:
295 case AV_PIX_FMT_YUV444P9LE:
296 yuv_16_black (nine_bit_uv, false);
299 case AV_PIX_FMT_YUV422P9BE:
300 case AV_PIX_FMT_YUV444P9BE:
301 yuv_16_black (swap_16 (nine_bit_uv), false);
304 case AV_PIX_FMT_YUV422P10LE:
305 case AV_PIX_FMT_YUV444P10LE:
306 yuv_16_black (ten_bit_uv, false);
309 case AV_PIX_FMT_YUV422P16LE:
310 case AV_PIX_FMT_YUV444P16LE:
311 yuv_16_black (sixteen_bit_uv, false);
314 case AV_PIX_FMT_YUV444P10BE:
315 case AV_PIX_FMT_YUV422P10BE:
316 yuv_16_black (swap_16 (ten_bit_uv), false);
319 case AV_PIX_FMT_YUVA420P9BE:
320 case AV_PIX_FMT_YUVA422P9BE:
321 case AV_PIX_FMT_YUVA444P9BE:
322 yuv_16_black (swap_16 (nine_bit_uv), true);
325 case AV_PIX_FMT_YUVA420P9LE:
326 case AV_PIX_FMT_YUVA422P9LE:
327 case AV_PIX_FMT_YUVA444P9LE:
328 yuv_16_black (nine_bit_uv, true);
331 case AV_PIX_FMT_YUVA420P10BE:
332 case AV_PIX_FMT_YUVA422P10BE:
333 case AV_PIX_FMT_YUVA444P10BE:
334 yuv_16_black (swap_16 (ten_bit_uv), true);
337 case AV_PIX_FMT_YUVA420P10LE:
338 case AV_PIX_FMT_YUVA422P10LE:
339 case AV_PIX_FMT_YUVA444P10LE:
340 yuv_16_black (ten_bit_uv, true);
343 case AV_PIX_FMT_YUVA420P16BE:
344 case AV_PIX_FMT_YUVA422P16BE:
345 case AV_PIX_FMT_YUVA444P16BE:
346 yuv_16_black (swap_16 (sixteen_bit_uv), true);
349 case AV_PIX_FMT_YUVA420P16LE:
350 case AV_PIX_FMT_YUVA422P16LE:
351 case AV_PIX_FMT_YUVA444P16LE:
352 yuv_16_black (sixteen_bit_uv, true);
355 case AV_PIX_FMT_RGB24:
356 case AV_PIX_FMT_ARGB:
357 case AV_PIX_FMT_RGBA:
358 case AV_PIX_FMT_ABGR:
359 case AV_PIX_FMT_BGRA:
360 case AV_PIX_FMT_RGB555LE:
361 case AV_PIX_FMT_RGB48LE:
362 case AV_PIX_FMT_RGB48BE:
363 memset (data()[0], 0, sample_size(0).height * stride()[0]);
366 case AV_PIX_FMT_UYVY422:
368 int const Y = sample_size(0).height;
369 int const X = line_size()[0];
370 uint8_t* p = data()[0];
371 for (int y = 0; y < Y; ++y) {
372 for (int x = 0; x < X / 4; ++x) {
373 *p++ = eight_bit_uv; // Cb
375 *p++ = eight_bit_uv; // Cr
383 throw PixelFormatError ("make_black()", _pixel_format);
388 Image::make_transparent ()
390 if (_pixel_format != AV_PIX_FMT_RGBA) {
391 throw PixelFormatError ("make_transparent()", _pixel_format);
394 memset (data()[0], 0, sample_size(0).height * stride()[0]);
398 Image::alpha_blend (shared_ptr<const Image> other, Position<int> position)
400 DCPOMATIC_ASSERT (other->pixel_format() == AV_PIX_FMT_RGBA);
401 int const other_bpp = 4;
403 int start_tx = position.x;
407 start_ox = -start_tx;
411 int start_ty = position.y;
415 start_oy = -start_ty;
419 switch (_pixel_format) {
420 case AV_PIX_FMT_RGB24:
422 int const this_bpp = 3;
423 for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
424 uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp;
425 uint8_t* op = other->data()[0] + oy * other->stride()[0];
426 for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
427 float const alpha = float (op[3]) / 255;
428 tp[0] = op[0] * alpha + tp[0] * (1 - alpha);
429 tp[1] = op[1] * alpha + tp[1] * (1 - alpha);
430 tp[2] = op[2] * alpha + tp[2] * (1 - alpha);
438 case AV_PIX_FMT_BGRA:
439 case AV_PIX_FMT_RGBA:
441 int const this_bpp = 4;
442 for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
443 uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp;
444 uint8_t* op = other->data()[0] + oy * other->stride()[0];
445 for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
446 float const alpha = float (op[3]) / 255;
447 tp[0] = op[0] * alpha + tp[0] * (1 - alpha);
448 tp[1] = op[1] * alpha + tp[1] * (1 - alpha);
449 tp[2] = op[2] * alpha + tp[2] * (1 - alpha);
450 tp[3] = op[3] * alpha + tp[3] * (1 - alpha);
458 case AV_PIX_FMT_RGB48LE:
460 int const this_bpp = 6;
461 for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
462 uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp;
463 uint8_t* op = other->data()[0] + oy * other->stride()[0];
464 for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
465 float const alpha = float (op[3]) / 255;
466 /* Blend high bytes */
467 tp[1] = op[0] * alpha + tp[1] * (1 - alpha);
468 tp[3] = op[1] * alpha + tp[3] * (1 - alpha);
469 tp[5] = op[2] * alpha + tp[5] * (1 - alpha);
478 DCPOMATIC_ASSERT (false);
483 Image::copy (shared_ptr<const Image> other, Position<int> position)
485 /* Only implemented for RGB24 onto RGB24 so far */
486 DCPOMATIC_ASSERT (_pixel_format == AV_PIX_FMT_RGB24 && other->pixel_format() == AV_PIX_FMT_RGB24);
487 DCPOMATIC_ASSERT (position.x >= 0 && position.y >= 0);
489 int const N = min (position.x + other->size().width, size().width) - position.x;
490 for (int ty = position.y, oy = 0; ty < size().height && oy < other->size().height; ++ty, ++oy) {
491 uint8_t * const tp = data()[0] + ty * stride()[0] + position.x * 3;
492 uint8_t * const op = other->data()[0] + oy * other->stride()[0];
493 memcpy (tp, op, N * 3);
498 Image::read_from_socket (shared_ptr<Socket> socket)
500 for (int i = 0; i < planes(); ++i) {
501 uint8_t* p = data()[i];
502 int const lines = sample_size(i).height;
503 for (int y = 0; y < lines; ++y) {
504 socket->read (p, line_size()[i]);
511 Image::write_to_socket (shared_ptr<Socket> socket) const
513 for (int i = 0; i < planes(); ++i) {
514 uint8_t* p = data()[i];
515 int const lines = sample_size(i).height;
516 for (int y = 0; y < lines; ++y) {
517 socket->write (p, line_size()[i]);
524 Image::bytes_per_pixel (int c) const
526 AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
528 throw PixelFormatError ("bytes_per_pixel()", _pixel_format);
535 float bpp[4] = { 0, 0, 0, 0 };
537 bpp[0] = floor ((d->comp[0].depth_minus1 + 1 + 7) / 8);
538 if (d->nb_components > 1) {
539 bpp[1] = floor ((d->comp[1].depth_minus1 + 1 + 7) / 8) / pow (2.0f, d->log2_chroma_w);
541 if (d->nb_components > 2) {
542 bpp[2] = floor ((d->comp[2].depth_minus1 + 1 + 7) / 8) / pow (2.0f, d->log2_chroma_w);
544 if (d->nb_components > 3) {
545 bpp[3] = floor ((d->comp[3].depth_minus1 + 1 + 7) / 8) / pow (2.0f, d->log2_chroma_w);
548 if ((d->flags & AV_PIX_FMT_FLAG_PLANAR) == 0) {
549 /* Not planar; sum them up */
550 return bpp[0] + bpp[1] + bpp[2] + bpp[3];
556 /** Construct a Image of a given size and format, allocating memory
559 * @param p Pixel format.
560 * @param s Size in pixels.
562 Image::Image (AVPixelFormat p, dcp::Size s, bool aligned)
573 _data = (uint8_t **) wrapped_av_malloc (4 * sizeof (uint8_t *));
574 _data[0] = _data[1] = _data[2] = _data[3] = 0;
576 _line_size = (int *) wrapped_av_malloc (4 * sizeof (int));
577 _line_size[0] = _line_size[1] = _line_size[2] = _line_size[3] = 0;
579 _stride = (int *) wrapped_av_malloc (4 * sizeof (int));
580 _stride[0] = _stride[1] = _stride[2] = _stride[3] = 0;
582 for (int i = 0; i < planes(); ++i) {
583 _line_size[i] = ceil (_size.width * bytes_per_pixel(i));
584 _stride[i] = stride_round_up (i, _line_size, _aligned ? 32 : 1);
586 /* The assembler function ff_rgb24ToY_avx (in libswscale/x86/input.asm)
587 uses a 16-byte fetch to read three bytes (R/G/B) of image data.
588 Hence on the last pixel of the last line it reads over the end of
589 the actual data by 1 byte. If the width of an image is a multiple
590 of the stride alignment there will be no padding at the end of image lines.
591 OS X crashes on this illegal read, though other operating systems don't
592 seem to mind. The nasty + 1 in this malloc makes sure there is always a byte
593 for that instruction to read safely.
595 Further to the above, valgrind is now telling me that ff_rgb24ToY_ssse3
596 over-reads by more then _avx. I can't follow the code to work out how much,
597 so I'll just over-allocate by 32 bytes and have done with it. Empirical
598 testing suggests that it works.
600 _data[i] = (uint8_t *) wrapped_av_malloc (_stride[i] * sample_size(i).height + 32);
604 Image::Image (Image const & other)
605 : _size (other._size)
606 , _pixel_format (other._pixel_format)
607 , _aligned (other._aligned)
611 for (int i = 0; i < planes(); ++i) {
612 uint8_t* p = _data[i];
613 uint8_t* q = other._data[i];
614 int const lines = sample_size(i).height;
615 for (int j = 0; j < lines; ++j) {
616 memcpy (p, q, _line_size[i]);
618 q += other.stride()[i];
623 Image::Image (AVFrame* frame)
624 : _size (frame->width, frame->height)
625 , _pixel_format (static_cast<AVPixelFormat> (frame->format))
630 for (int i = 0; i < planes(); ++i) {
631 uint8_t* p = _data[i];
632 uint8_t* q = frame->data[i];
633 int const lines = sample_size(i).height;
634 for (int j = 0; j < lines; ++j) {
635 memcpy (p, q, _line_size[i]);
637 /* AVFrame's linesize is what we call `stride' */
638 q += frame->linesize[i];
643 Image::Image (shared_ptr<const Image> other, bool aligned)
644 : _size (other->_size)
645 , _pixel_format (other->_pixel_format)
650 for (int i = 0; i < planes(); ++i) {
651 DCPOMATIC_ASSERT (line_size()[i] == other->line_size()[i]);
652 uint8_t* p = _data[i];
653 uint8_t* q = other->data()[i];
654 int const lines = sample_size(i).height;
655 for (int j = 0; j < lines; ++j) {
656 memcpy (p, q, line_size()[i]);
658 q += other->stride()[i];
664 Image::operator= (Image const & other)
666 if (this == &other) {
676 Image::swap (Image & other)
678 std::swap (_size, other._size);
679 std::swap (_pixel_format, other._pixel_format);
681 for (int i = 0; i < 4; ++i) {
682 std::swap (_data[i], other._data[i]);
683 std::swap (_line_size[i], other._line_size[i]);
684 std::swap (_stride[i], other._stride[i]);
687 std::swap (_aligned, other._aligned);
690 /** Destroy a Image */
693 for (int i = 0; i < planes(); ++i) {
698 av_free (_line_size);
709 Image::line_size () const
715 Image::stride () const
727 Image::aligned () const
733 merge (list<PositionImage> images)
735 if (images.empty ()) {
736 return PositionImage ();
739 if (images.size() == 1) {
740 return images.front ();
743 dcpomatic::Rect<int> all (images.front().position, images.front().image->size().width, images.front().image->size().height);
744 for (list<PositionImage>::const_iterator i = images.begin(); i != images.end(); ++i) {
745 all.extend (dcpomatic::Rect<int> (i->position, i->image->size().width, i->image->size().height));
748 shared_ptr<Image> merged (new Image (images.front().image->pixel_format (), dcp::Size (all.width, all.height), true));
749 merged->make_transparent ();
750 for (list<PositionImage>::const_iterator i = images.begin(); i != images.end(); ++i) {
751 merged->alpha_blend (i->image, i->position - all.position());
754 return PositionImage (merged, all.position ());
758 operator== (Image const & a, Image const & b)
760 if (a.planes() != b.planes() || a.pixel_format() != b.pixel_format() || a.aligned() != b.aligned()) {
764 for (int c = 0; c < a.planes(); ++c) {
765 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]) {
769 uint8_t* p = a.data()[c];
770 uint8_t* q = b.data()[c];
771 int const lines = a.sample_size(c).height;
772 for (int y = 0; y < lines; ++y) {
773 if (memcmp (p, q, a.line_size()[c]) != 0) {
786 * @param f Amount to fade by; 0 is black, 1 is no fade.
789 Image::fade (float f)
791 switch (_pixel_format) {
792 case AV_PIX_FMT_YUV420P:
793 case AV_PIX_FMT_YUV422P:
794 case AV_PIX_FMT_YUV444P:
795 case AV_PIX_FMT_YUV411P:
796 case AV_PIX_FMT_YUVJ420P:
797 case AV_PIX_FMT_YUVJ422P:
798 case AV_PIX_FMT_YUVJ444P:
799 case AV_PIX_FMT_RGB24:
800 case AV_PIX_FMT_ARGB:
801 case AV_PIX_FMT_RGBA:
802 case AV_PIX_FMT_ABGR:
803 case AV_PIX_FMT_BGRA:
804 case AV_PIX_FMT_RGB555LE:
806 for (int c = 0; c < 3; ++c) {
807 uint8_t* p = data()[c];
808 int const lines = sample_size(c).height;
809 for (int y = 0; y < lines; ++y) {
811 for (int x = 0; x < line_size()[c]; ++x) {
812 *q = int (float (*q) * f);
820 case AV_PIX_FMT_YUV422P9LE:
821 case AV_PIX_FMT_YUV444P9LE:
822 case AV_PIX_FMT_YUV422P10LE:
823 case AV_PIX_FMT_YUV444P10LE:
824 case AV_PIX_FMT_YUV422P16LE:
825 case AV_PIX_FMT_YUV444P16LE:
826 case AV_PIX_FMT_YUVA420P9LE:
827 case AV_PIX_FMT_YUVA422P9LE:
828 case AV_PIX_FMT_YUVA444P9LE:
829 case AV_PIX_FMT_YUVA420P10LE:
830 case AV_PIX_FMT_YUVA422P10LE:
831 case AV_PIX_FMT_YUVA444P10LE:
832 case AV_PIX_FMT_RGB48LE:
833 /* 16-bit little-endian */
834 for (int c = 0; c < 3; ++c) {
835 int const stride_pixels = stride()[c] / 2;
836 int const line_size_pixels = line_size()[c] / 2;
837 uint16_t* p = reinterpret_cast<uint16_t*> (data()[c]);
838 int const lines = sample_size(c).height;
839 for (int y = 0; y < lines; ++y) {
841 for (int x = 0; x < line_size_pixels; ++x) {
842 *q = int (float (*q) * f);
850 case AV_PIX_FMT_YUV422P9BE:
851 case AV_PIX_FMT_YUV444P9BE:
852 case AV_PIX_FMT_YUV444P10BE:
853 case AV_PIX_FMT_YUV422P10BE:
854 case AV_PIX_FMT_YUVA420P9BE:
855 case AV_PIX_FMT_YUVA422P9BE:
856 case AV_PIX_FMT_YUVA444P9BE:
857 case AV_PIX_FMT_YUVA420P10BE:
858 case AV_PIX_FMT_YUVA422P10BE:
859 case AV_PIX_FMT_YUVA444P10BE:
860 case AV_PIX_FMT_YUVA420P16BE:
861 case AV_PIX_FMT_YUVA422P16BE:
862 case AV_PIX_FMT_YUVA444P16BE:
863 case AV_PIX_FMT_RGB48BE:
864 /* 16-bit big-endian */
865 for (int c = 0; c < 3; ++c) {
866 int const stride_pixels = stride()[c] / 2;
867 int const line_size_pixels = line_size()[c] / 2;
868 uint16_t* p = reinterpret_cast<uint16_t*> (data()[c]);
869 int const lines = sample_size(c).height;
870 for (int y = 0; y < lines; ++y) {
872 for (int x = 0; x < line_size_pixels; ++x) {
873 *q = swap_16 (int (float (swap_16 (*q)) * f));
881 case AV_PIX_FMT_UYVY422:
883 int const Y = sample_size(0).height;
884 int const X = line_size()[0];
885 uint8_t* p = data()[0];
886 for (int y = 0; y < Y; ++y) {
887 for (int x = 0; x < X; ++x) {
888 *p = int (float (*p) * f);
896 throw PixelFormatError ("fade()", _pixel_format);