2 Copyright (C) 2012-2016 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/>.
21 /** @file src/image.cc
22 * @brief A class to describe a video image.
26 #include "exceptions.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)))
86 /** @return Number of planes */
88 Image::planes () const
90 AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
92 throw PixelFormatError ("planes()", _pixel_format);
95 if ((d->flags & AV_PIX_FMT_FLAG_PLANAR) == 0) {
99 return d->nb_components;
102 /** Crop this image, scale it to `inter_size' and then place it in a black frame of `out_size'.
103 * @param fast Try to be fast at the possible expense of quality; at present this means using
104 * fast bilinear rather than bicubic scaling.
107 Image::crop_scale_window (
108 Crop crop, dcp::Size inter_size, dcp::Size out_size, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, bool out_aligned, bool fast
111 /* Empirical testing suggests that sws_scale() will crash if
112 the input image is not aligned.
114 DCPOMATIC_ASSERT (aligned ());
116 DCPOMATIC_ASSERT (out_size.width >= inter_size.width);
117 DCPOMATIC_ASSERT (out_size.height >= inter_size.height);
119 /* Here's an image of out_size. Below we may write to it starting at an offset so we get some padding.
120 Hence we want to write in the following pattern:
122 block start write start line end
123 |..(padding)..|<------line-size------------->|..(padding)..|
124 |..(padding)..|<------line-size------------->|..(padding)..|
125 |..(padding)..|<------line-size------------->|..(padding)..|
127 where line-size is of the smaller (inter_size) image and the full padded line length is that of
128 out_size. To get things to work we have to tell FFmpeg that the stride is that of out_size.
129 However some parts of FFmpeg (notably rgb48Toxyz12 in swscale.c) process data for the full
130 specified *stride*. This does not matter until we get to the last line:
132 block start write start line end
133 |..(padding)..|<------line-size------------->|XXXwrittenXXX|
134 |XXXwrittenXXX|<------line-size------------->|XXXwrittenXXX|
135 |XXXwrittenXXX|<------line-size------------->|XXXwrittenXXXXXXwrittenXXX
138 To get around this, we ask Image to overallocate its buffers by the overrun.
141 shared_ptr<Image> out (new Image (out_format, out_size, out_aligned, (out_size.width - inter_size.width) / 2));
144 /* Size of the image after any crop */
145 dcp::Size const cropped_size = crop.apply (size ());
147 /* Scale context for a scale from cropped_size to inter_size */
148 struct SwsContext* scale_context = sws_getContext (
149 cropped_size.width, cropped_size.height, pixel_format(),
150 inter_size.width, inter_size.height, out_format,
151 fast ? SWS_FAST_BILINEAR : SWS_BICUBIC, 0, 0, 0
154 if (!scale_context) {
155 throw runtime_error (N_("Could not allocate SwsContext"));
158 DCPOMATIC_ASSERT (yuv_to_rgb < dcp::YUV_TO_RGB_COUNT);
159 int const lut[dcp::YUV_TO_RGB_COUNT] = {
164 sws_setColorspaceDetails (
166 sws_getCoefficients (lut[yuv_to_rgb]), 0,
167 sws_getCoefficients (lut[yuv_to_rgb]), 0,
171 AVPixFmtDescriptor const * desc = av_pix_fmt_desc_get (_pixel_format);
173 throw PixelFormatError ("crop_scale_window()", _pixel_format);
176 /* Prepare input data pointers with crop */
177 uint8_t* scale_in_data[planes()];
178 for (int c = 0; c < planes(); ++c) {
179 /* To work out the crop in bytes, start by multiplying
180 the crop by the (average) bytes per pixel. Then
181 round down so that we don't crop a subsampled pixel until
182 we've cropped all of its Y-channel pixels.
184 int const x = lrintf (bytes_per_pixel(c) * crop.left) & ~ ((int) desc->log2_chroma_w);
185 scale_in_data[c] = data()[c] + x + stride()[c] * (crop.top / line_factor(c));
188 /* Corner of the image within out_size */
189 Position<int> const corner ((out_size.width - inter_size.width) / 2, (out_size.height - inter_size.height) / 2);
191 uint8_t* scale_out_data[out->planes()];
192 for (int c = 0; c < out->planes(); ++c) {
193 scale_out_data[c] = out->data()[c] + lrintf (out->bytes_per_pixel(c) * corner.x) + out->stride()[c] * corner.y;
198 scale_in_data, stride(),
199 0, cropped_size.height,
200 scale_out_data, out->stride()
203 sws_freeContext (scale_context);
208 /** @param fast Try to be fast at the possible expense of quality; at present this means using
209 * fast bilinear rather than bicubic scaling.
212 Image::scale (dcp::Size out_size, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, bool out_aligned, bool fast) const
214 /* Empirical testing suggests that sws_scale() will crash if
215 the input image is not aligned.
217 DCPOMATIC_ASSERT (aligned ());
219 shared_ptr<Image> scaled (new Image (out_format, out_size, out_aligned));
221 struct SwsContext* scale_context = sws_getContext (
222 size().width, size().height, pixel_format(),
223 out_size.width, out_size.height, out_format,
224 fast ? SWS_FAST_BILINEAR : SWS_BICUBIC, 0, 0, 0
227 DCPOMATIC_ASSERT (yuv_to_rgb < dcp::YUV_TO_RGB_COUNT);
228 int const lut[dcp::YUV_TO_RGB_COUNT] = {
233 sws_setColorspaceDetails (
235 sws_getCoefficients (lut[yuv_to_rgb]), 0,
236 sws_getCoefficients (lut[yuv_to_rgb]), 0,
244 scaled->data(), scaled->stride()
247 sws_freeContext (scale_context);
252 /** Blacken a YUV image whose bits per pixel is rounded up to 16 */
254 Image::yuv_16_black (uint16_t v, bool alpha)
256 memset (data()[0], 0, sample_size(0).height * stride()[0]);
257 for (int i = 1; i < 3; ++i) {
258 int16_t* p = reinterpret_cast<int16_t*> (data()[i]);
259 int const lines = sample_size(i).height;
260 for (int y = 0; y < lines; ++y) {
261 /* We divide by 2 here because we are writing 2 bytes at a time */
262 for (int x = 0; x < line_size()[i] / 2; ++x) {
265 p += stride()[i] / 2;
270 memset (data()[3], 0, sample_size(3).height * stride()[3]);
275 Image::swap_16 (uint16_t v)
277 return ((v >> 8) & 0xff) | ((v & 0xff) << 8);
283 /* U/V black value for 8-bit colour */
284 static uint8_t const eight_bit_uv = (1 << 7) - 1;
285 /* U/V black value for 9-bit colour */
286 static uint16_t const nine_bit_uv = (1 << 8) - 1;
287 /* U/V black value for 10-bit colour */
288 static uint16_t const ten_bit_uv = (1 << 9) - 1;
289 /* U/V black value for 16-bit colour */
290 static uint16_t const sixteen_bit_uv = (1 << 15) - 1;
292 switch (_pixel_format) {
293 case AV_PIX_FMT_YUV420P:
294 case AV_PIX_FMT_YUV422P:
295 case AV_PIX_FMT_YUV444P:
296 case AV_PIX_FMT_YUV411P:
297 memset (data()[0], 0, sample_size(0).height * stride()[0]);
298 memset (data()[1], eight_bit_uv, sample_size(1).height * stride()[1]);
299 memset (data()[2], eight_bit_uv, sample_size(2).height * stride()[2]);
302 case AV_PIX_FMT_YUVJ420P:
303 case AV_PIX_FMT_YUVJ422P:
304 case AV_PIX_FMT_YUVJ444P:
305 memset (data()[0], 0, sample_size(0).height * stride()[0]);
306 memset (data()[1], eight_bit_uv + 1, sample_size(1).height * stride()[1]);
307 memset (data()[2], eight_bit_uv + 1, sample_size(2).height * stride()[2]);
310 case AV_PIX_FMT_YUV422P9LE:
311 case AV_PIX_FMT_YUV444P9LE:
312 yuv_16_black (nine_bit_uv, false);
315 case AV_PIX_FMT_YUV422P9BE:
316 case AV_PIX_FMT_YUV444P9BE:
317 yuv_16_black (swap_16 (nine_bit_uv), false);
320 case AV_PIX_FMT_YUV422P10LE:
321 case AV_PIX_FMT_YUV444P10LE:
322 yuv_16_black (ten_bit_uv, false);
325 case AV_PIX_FMT_YUV422P16LE:
326 case AV_PIX_FMT_YUV444P16LE:
327 yuv_16_black (sixteen_bit_uv, false);
330 case AV_PIX_FMT_YUV444P10BE:
331 case AV_PIX_FMT_YUV422P10BE:
332 yuv_16_black (swap_16 (ten_bit_uv), false);
335 case AV_PIX_FMT_YUVA420P9BE:
336 case AV_PIX_FMT_YUVA422P9BE:
337 case AV_PIX_FMT_YUVA444P9BE:
338 yuv_16_black (swap_16 (nine_bit_uv), true);
341 case AV_PIX_FMT_YUVA420P9LE:
342 case AV_PIX_FMT_YUVA422P9LE:
343 case AV_PIX_FMT_YUVA444P9LE:
344 yuv_16_black (nine_bit_uv, true);
347 case AV_PIX_FMT_YUVA420P10BE:
348 case AV_PIX_FMT_YUVA422P10BE:
349 case AV_PIX_FMT_YUVA444P10BE:
350 yuv_16_black (swap_16 (ten_bit_uv), true);
353 case AV_PIX_FMT_YUVA420P10LE:
354 case AV_PIX_FMT_YUVA422P10LE:
355 case AV_PIX_FMT_YUVA444P10LE:
356 yuv_16_black (ten_bit_uv, true);
359 case AV_PIX_FMT_YUVA420P16BE:
360 case AV_PIX_FMT_YUVA422P16BE:
361 case AV_PIX_FMT_YUVA444P16BE:
362 yuv_16_black (swap_16 (sixteen_bit_uv), true);
365 case AV_PIX_FMT_YUVA420P16LE:
366 case AV_PIX_FMT_YUVA422P16LE:
367 case AV_PIX_FMT_YUVA444P16LE:
368 yuv_16_black (sixteen_bit_uv, true);
371 case AV_PIX_FMT_RGB24:
372 case AV_PIX_FMT_ARGB:
373 case AV_PIX_FMT_RGBA:
374 case AV_PIX_FMT_ABGR:
375 case AV_PIX_FMT_BGRA:
376 case AV_PIX_FMT_RGB555LE:
377 case AV_PIX_FMT_RGB48LE:
378 case AV_PIX_FMT_RGB48BE:
379 case AV_PIX_FMT_XYZ12LE:
380 memset (data()[0], 0, sample_size(0).height * stride()[0]);
383 case AV_PIX_FMT_UYVY422:
385 int const Y = sample_size(0).height;
386 int const X = line_size()[0];
387 uint8_t* p = data()[0];
388 for (int y = 0; y < Y; ++y) {
389 for (int x = 0; x < X / 4; ++x) {
390 *p++ = eight_bit_uv; // Cb
392 *p++ = eight_bit_uv; // Cr
400 throw PixelFormatError ("make_black()", _pixel_format);
405 Image::make_transparent ()
407 if (_pixel_format != AV_PIX_FMT_RGBA) {
408 throw PixelFormatError ("make_transparent()", _pixel_format);
411 memset (data()[0], 0, sample_size(0).height * stride()[0]);
415 Image::alpha_blend (shared_ptr<const Image> other, Position<int> position)
417 /* We're blending RGBA images; first byte is blue, second byte is green, third byte blue, fourth byte alpha */
418 DCPOMATIC_ASSERT (other->pixel_format() == AV_PIX_FMT_RGBA);
419 int const other_bpp = 4;
421 int start_tx = position.x;
425 start_ox = -start_tx;
429 int start_ty = position.y;
433 start_oy = -start_ty;
437 switch (_pixel_format) {
438 case AV_PIX_FMT_RGB24:
440 /* Going onto RGB24. First byte is red, second green, third blue */
441 int const this_bpp = 3;
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[2] * alpha + tp[0] * (1 - alpha);
448 tp[1] = op[1] * alpha + tp[1] * (1 - alpha);
449 tp[2] = op[0] * alpha + tp[2] * (1 - alpha);
457 case AV_PIX_FMT_BGRA:
458 case AV_PIX_FMT_RGBA:
460 int const this_bpp = 4;
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 tp[0] = op[0] * alpha + tp[0] * (1 - alpha);
467 tp[1] = op[1] * alpha + tp[1] * (1 - alpha);
468 tp[2] = op[2] * alpha + tp[2] * (1 - alpha);
469 tp[3] = op[3] * alpha + tp[3] * (1 - alpha);
477 case AV_PIX_FMT_RGB48LE:
479 int const this_bpp = 6;
480 for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
481 uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp;
482 uint8_t* op = other->data()[0] + oy * other->stride()[0];
483 for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
484 float const alpha = float (op[3]) / 255;
485 /* Blend high bytes; the RGBA in op appears to be BGRA */
486 tp[1] = op[2] * alpha + tp[1] * (1 - alpha);
487 tp[3] = op[1] * alpha + tp[3] * (1 - alpha);
488 tp[5] = op[0] * alpha + tp[5] * (1 - alpha);
496 case AV_PIX_FMT_XYZ12LE:
498 boost::numeric::ublas::matrix<double> matrix = dcp::ColourConversion::srgb_to_xyz().rgb_to_xyz();
499 int const this_bpp = 6;
500 for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
501 uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp;
502 uint8_t* op = other->data()[0] + oy * other->stride()[0];
503 for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
504 float const alpha = float (op[3]) / 255;
506 /* Convert sRGB to XYZ; op is BGRA */
507 int const x = matrix(0, 0) * op[2] + matrix(0, 1) * op[1] + matrix(0, 2) * op[0];
508 int const y = matrix(1, 0) * op[2] + matrix(1, 1) * op[1] + matrix(1, 2) * op[0];
509 int const z = matrix(2, 0) * op[2] + matrix(2, 1) * op[1] + matrix(2, 2) * op[0];
511 /* Blend high bytes */
512 tp[1] = min (x, 255) * alpha + tp[1] * (1 - alpha);
513 tp[3] = min (y, 255) * alpha + tp[3] * (1 - alpha);
514 tp[5] = min (z, 255) * alpha + tp[5] * (1 - alpha);
523 DCPOMATIC_ASSERT (false);
528 Image::copy (shared_ptr<const Image> other, Position<int> position)
530 /* Only implemented for RGB24 onto RGB24 so far */
531 DCPOMATIC_ASSERT (_pixel_format == AV_PIX_FMT_RGB24 && other->pixel_format() == AV_PIX_FMT_RGB24);
532 DCPOMATIC_ASSERT (position.x >= 0 && position.y >= 0);
534 int const N = min (position.x + other->size().width, size().width) - position.x;
535 for (int ty = position.y, oy = 0; ty < size().height && oy < other->size().height; ++ty, ++oy) {
536 uint8_t * const tp = data()[0] + ty * stride()[0] + position.x * 3;
537 uint8_t * const op = other->data()[0] + oy * other->stride()[0];
538 memcpy (tp, op, N * 3);
543 Image::read_from_socket (shared_ptr<Socket> socket)
545 for (int i = 0; i < planes(); ++i) {
546 uint8_t* p = data()[i];
547 int const lines = sample_size(i).height;
548 for (int y = 0; y < lines; ++y) {
549 socket->read (p, line_size()[i]);
556 Image::write_to_socket (shared_ptr<Socket> socket) const
558 for (int i = 0; i < planes(); ++i) {
559 uint8_t* p = data()[i];
560 int const lines = sample_size(i).height;
561 for (int y = 0; y < lines; ++y) {
562 socket->write (p, line_size()[i]);
569 Image::bytes_per_pixel (int c) const
571 AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
573 throw PixelFormatError ("bytes_per_pixel()", _pixel_format);
580 float bpp[4] = { 0, 0, 0, 0 };
582 #ifdef DCPOMATIC_HAVE_AVCOMPONENTDESCRIPTOR_DEPTH_MINUS1
583 bpp[0] = floor ((d->comp[0].depth_minus1 + 8) / 8);
584 if (d->nb_components > 1) {
585 bpp[1] = floor ((d->comp[1].depth_minus1 + 8) / 8) / pow (2.0f, d->log2_chroma_w);
587 if (d->nb_components > 2) {
588 bpp[2] = floor ((d->comp[2].depth_minus1 + 8) / 8) / pow (2.0f, d->log2_chroma_w);
590 if (d->nb_components > 3) {
591 bpp[3] = floor ((d->comp[3].depth_minus1 + 8) / 8) / pow (2.0f, d->log2_chroma_w);
594 bpp[0] = floor ((d->comp[0].depth + 7) / 8);
595 if (d->nb_components > 1) {
596 bpp[1] = floor ((d->comp[1].depth + 7) / 8) / pow (2.0f, d->log2_chroma_w);
598 if (d->nb_components > 2) {
599 bpp[2] = floor ((d->comp[2].depth + 7) / 8) / pow (2.0f, d->log2_chroma_w);
601 if (d->nb_components > 3) {
602 bpp[3] = floor ((d->comp[3].depth + 7) / 8) / pow (2.0f, d->log2_chroma_w);
606 if ((d->flags & AV_PIX_FMT_FLAG_PLANAR) == 0) {
607 /* Not planar; sum them up */
608 return bpp[0] + bpp[1] + bpp[2] + bpp[3];
614 /** Construct a Image of a given size and format, allocating memory
617 * @param p Pixel format.
618 * @param s Size in pixels.
619 * @param extra_pixels Amount of extra "run-off" memory to allocate at the end of each plane in pixels.
621 Image::Image (AVPixelFormat p, dcp::Size s, bool aligned, int extra_pixels)
625 , _extra_pixels (extra_pixels)
633 _data = (uint8_t **) wrapped_av_malloc (4 * sizeof (uint8_t *));
634 _data[0] = _data[1] = _data[2] = _data[3] = 0;
636 _line_size = (int *) wrapped_av_malloc (4 * sizeof (int));
637 _line_size[0] = _line_size[1] = _line_size[2] = _line_size[3] = 0;
639 _stride = (int *) wrapped_av_malloc (4 * sizeof (int));
640 _stride[0] = _stride[1] = _stride[2] = _stride[3] = 0;
642 for (int i = 0; i < planes(); ++i) {
643 _line_size[i] = ceil (_size.width * bytes_per_pixel(i));
644 _stride[i] = stride_round_up (i, _line_size, _aligned ? 32 : 1);
646 /* The assembler function ff_rgb24ToY_avx (in libswscale/x86/input.asm)
647 uses a 16-byte fetch to read three bytes (R/G/B) of image data.
648 Hence on the last pixel of the last line it reads over the end of
649 the actual data by 1 byte. If the width of an image is a multiple
650 of the stride alignment there will be no padding at the end of image lines.
651 OS X crashes on this illegal read, though other operating systems don't
652 seem to mind. The nasty + 1 in this malloc makes sure there is always a byte
653 for that instruction to read safely.
655 Further to the above, valgrind is now telling me that ff_rgb24ToY_ssse3
656 over-reads by more then _avx. I can't follow the code to work out how much,
657 so I'll just over-allocate by 32 bytes and have done with it. Empirical
658 testing suggests that it works.
660 _data[i] = (uint8_t *) wrapped_av_malloc (_stride[i] * sample_size(i).height + _extra_pixels * bytes_per_pixel(i) + 32);
664 Image::Image (Image const & other)
665 : _size (other._size)
666 , _pixel_format (other._pixel_format)
667 , _aligned (other._aligned)
668 , _extra_pixels (other._extra_pixels)
672 for (int i = 0; i < planes(); ++i) {
673 uint8_t* p = _data[i];
674 uint8_t* q = other._data[i];
675 int const lines = sample_size(i).height;
676 for (int j = 0; j < lines; ++j) {
677 memcpy (p, q, _line_size[i]);
679 q += other.stride()[i];
684 Image::Image (AVFrame* frame)
685 : _size (frame->width, frame->height)
686 , _pixel_format (static_cast<AVPixelFormat> (frame->format))
692 for (int i = 0; i < planes(); ++i) {
693 uint8_t* p = _data[i];
694 uint8_t* q = frame->data[i];
695 int const lines = sample_size(i).height;
696 for (int j = 0; j < lines; ++j) {
697 memcpy (p, q, _line_size[i]);
699 /* AVFrame's linesize is what we call `stride' */
700 q += frame->linesize[i];
705 Image::Image (shared_ptr<const Image> other, bool aligned)
706 : _size (other->_size)
707 , _pixel_format (other->_pixel_format)
709 , _extra_pixels (other->_extra_pixels)
713 for (int i = 0; i < planes(); ++i) {
714 DCPOMATIC_ASSERT (line_size()[i] == other->line_size()[i]);
715 uint8_t* p = _data[i];
716 uint8_t* q = other->data()[i];
717 int const lines = sample_size(i).height;
718 for (int j = 0; j < lines; ++j) {
719 memcpy (p, q, line_size()[i]);
721 q += other->stride()[i];
727 Image::operator= (Image const & other)
729 if (this == &other) {
739 Image::swap (Image & other)
741 std::swap (_size, other._size);
742 std::swap (_pixel_format, other._pixel_format);
744 for (int i = 0; i < 4; ++i) {
745 std::swap (_data[i], other._data[i]);
746 std::swap (_line_size[i], other._line_size[i]);
747 std::swap (_stride[i], other._stride[i]);
750 std::swap (_aligned, other._aligned);
751 std::swap (_extra_pixels, other._extra_pixels);
754 /** Destroy a Image */
757 for (int i = 0; i < planes(); ++i) {
762 av_free (_line_size);
773 Image::line_size () const
779 Image::stride () const
791 Image::aligned () const
797 merge (list<PositionImage> images)
799 if (images.empty ()) {
800 return PositionImage ();
803 if (images.size() == 1) {
804 return images.front ();
807 dcpomatic::Rect<int> all (images.front().position, images.front().image->size().width, images.front().image->size().height);
808 for (list<PositionImage>::const_iterator i = images.begin(); i != images.end(); ++i) {
809 all.extend (dcpomatic::Rect<int> (i->position, i->image->size().width, i->image->size().height));
812 shared_ptr<Image> merged (new Image (images.front().image->pixel_format (), dcp::Size (all.width, all.height), true));
813 merged->make_transparent ();
814 for (list<PositionImage>::const_iterator i = images.begin(); i != images.end(); ++i) {
815 merged->alpha_blend (i->image, i->position - all.position());
818 return PositionImage (merged, all.position ());
822 operator== (Image const & a, Image const & b)
824 if (a.planes() != b.planes() || a.pixel_format() != b.pixel_format() || a.aligned() != b.aligned()) {
828 for (int c = 0; c < a.planes(); ++c) {
829 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]) {
833 uint8_t* p = a.data()[c];
834 uint8_t* q = b.data()[c];
835 int const lines = a.sample_size(c).height;
836 for (int y = 0; y < lines; ++y) {
837 if (memcmp (p, q, a.line_size()[c]) != 0) {
850 * @param f Amount to fade by; 0 is black, 1 is no fade.
853 Image::fade (float f)
855 switch (_pixel_format) {
856 case AV_PIX_FMT_YUV420P:
857 case AV_PIX_FMT_YUV422P:
858 case AV_PIX_FMT_YUV444P:
859 case AV_PIX_FMT_YUV411P:
860 case AV_PIX_FMT_YUVJ420P:
861 case AV_PIX_FMT_YUVJ422P:
862 case AV_PIX_FMT_YUVJ444P:
863 case AV_PIX_FMT_RGB24:
864 case AV_PIX_FMT_ARGB:
865 case AV_PIX_FMT_RGBA:
866 case AV_PIX_FMT_ABGR:
867 case AV_PIX_FMT_BGRA:
868 case AV_PIX_FMT_RGB555LE:
870 for (int c = 0; c < 3; ++c) {
871 uint8_t* p = data()[c];
872 int const lines = sample_size(c).height;
873 for (int y = 0; y < lines; ++y) {
875 for (int x = 0; x < line_size()[c]; ++x) {
876 *q = int (float (*q) * f);
884 case AV_PIX_FMT_YUV422P9LE:
885 case AV_PIX_FMT_YUV444P9LE:
886 case AV_PIX_FMT_YUV422P10LE:
887 case AV_PIX_FMT_YUV444P10LE:
888 case AV_PIX_FMT_YUV422P16LE:
889 case AV_PIX_FMT_YUV444P16LE:
890 case AV_PIX_FMT_YUVA420P9LE:
891 case AV_PIX_FMT_YUVA422P9LE:
892 case AV_PIX_FMT_YUVA444P9LE:
893 case AV_PIX_FMT_YUVA420P10LE:
894 case AV_PIX_FMT_YUVA422P10LE:
895 case AV_PIX_FMT_YUVA444P10LE:
896 case AV_PIX_FMT_RGB48LE:
897 case AV_PIX_FMT_XYZ12LE:
898 /* 16-bit little-endian */
899 for (int c = 0; c < 3; ++c) {
900 int const stride_pixels = stride()[c] / 2;
901 int const line_size_pixels = line_size()[c] / 2;
902 uint16_t* p = reinterpret_cast<uint16_t*> (data()[c]);
903 int const lines = sample_size(c).height;
904 for (int y = 0; y < lines; ++y) {
906 for (int x = 0; x < line_size_pixels; ++x) {
907 *q = int (float (*q) * f);
915 case AV_PIX_FMT_YUV422P9BE:
916 case AV_PIX_FMT_YUV444P9BE:
917 case AV_PIX_FMT_YUV444P10BE:
918 case AV_PIX_FMT_YUV422P10BE:
919 case AV_PIX_FMT_YUVA420P9BE:
920 case AV_PIX_FMT_YUVA422P9BE:
921 case AV_PIX_FMT_YUVA444P9BE:
922 case AV_PIX_FMT_YUVA420P10BE:
923 case AV_PIX_FMT_YUVA422P10BE:
924 case AV_PIX_FMT_YUVA444P10BE:
925 case AV_PIX_FMT_YUVA420P16BE:
926 case AV_PIX_FMT_YUVA422P16BE:
927 case AV_PIX_FMT_YUVA444P16BE:
928 case AV_PIX_FMT_RGB48BE:
929 /* 16-bit big-endian */
930 for (int c = 0; c < 3; ++c) {
931 int const stride_pixels = stride()[c] / 2;
932 int const line_size_pixels = line_size()[c] / 2;
933 uint16_t* p = reinterpret_cast<uint16_t*> (data()[c]);
934 int const lines = sample_size(c).height;
935 for (int y = 0; y < lines; ++y) {
937 for (int x = 0; x < line_size_pixels; ++x) {
938 *q = swap_16 (int (float (swap_16 (*q)) * f));
946 case AV_PIX_FMT_UYVY422:
948 int const Y = sample_size(0).height;
949 int const X = line_size()[0];
950 uint8_t* p = data()[0];
951 for (int y = 0; y < Y; ++y) {
952 for (int x = 0; x < X; ++x) {
953 *p = int (float (*p) * f);
961 throw PixelFormatError ("fade()", _pixel_format);