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 "md5_digester.h"
31 #include "dcpomatic_socket.h"
33 #include <libswscale/swscale.h>
34 #include <libavutil/pixfmt.h>
35 #include <libavutil/pixdesc.h>
36 #include <libavutil/frame.h>
47 using std::runtime_error;
48 using boost::shared_ptr;
52 Image::line_factor (int n) const
58 AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
60 throw PixelFormatError ("line_factor()", _pixel_format);
63 return pow (2.0f, d->log2_chroma_h);
66 /** @param n Component index.
67 * @return Number of samples (i.e. pixels, unless sub-sampled) in each direction for this component.
70 Image::sample_size (int n) const
72 int horizontal_factor = 1;
74 AVPixFmtDescriptor const * d = av_pix_fmt_desc_get (_pixel_format);
76 throw PixelFormatError ("sample_size()", _pixel_format);
78 horizontal_factor = pow (2.0f, d->log2_chroma_w);
82 lrint (ceil (static_cast<double>(size().width) / horizontal_factor)),
83 lrint (ceil (static_cast<double>(size().height) / line_factor (n)))
88 Image::components () const
90 AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
92 throw PixelFormatError ("components()", _pixel_format);
95 return d->nb_components;
98 /** @return Number of planes */
100 Image::planes () const
102 AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
104 throw PixelFormatError ("planes()", _pixel_format);
107 if ((d->flags & AV_PIX_FMT_FLAG_PLANAR) == 0) {
111 return d->nb_components;
114 /** Crop this image, scale it to `inter_size' and then place it in a black frame of `out_size'.
115 * @param fast Try to be fast at the possible expense of quality; at present this means using
116 * fast bilinear rather than bicubic scaling.
119 Image::crop_scale_window (
120 Crop crop, dcp::Size inter_size, dcp::Size out_size, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, bool out_aligned, bool fast
123 /* Empirical testing suggests that sws_scale() will crash if
124 the input image is not aligned.
126 DCPOMATIC_ASSERT (aligned ());
128 DCPOMATIC_ASSERT (out_size.width >= inter_size.width);
129 DCPOMATIC_ASSERT (out_size.height >= inter_size.height);
131 /* Here's an image of out_size. Below we may write to it starting at an offset so we get some padding.
132 Hence we want to write in the following pattern:
134 block start write start line end
135 |..(padding)..|<------line-size------------->|..(padding)..|
136 |..(padding)..|<------line-size------------->|..(padding)..|
137 |..(padding)..|<------line-size------------->|..(padding)..|
139 where line-size is of the smaller (inter_size) image and the full padded line length is that of
140 out_size. To get things to work we have to tell FFmpeg that the stride is that of out_size.
141 However some parts of FFmpeg (notably rgb48Toxyz12 in swscale.c) process data for the full
142 specified *stride*. This does not matter until we get to the last line:
144 block start write start line end
145 |..(padding)..|<------line-size------------->|XXXwrittenXXX|
146 |XXXwrittenXXX|<------line-size------------->|XXXwrittenXXX|
147 |XXXwrittenXXX|<------line-size------------->|XXXwrittenXXXXXXwrittenXXX
150 To get around this, we ask Image to overallocate its buffers by the overrun.
153 shared_ptr<Image> out (new Image (out_format, out_size, out_aligned, (out_size.width - inter_size.width) / 2));
156 /* Size of the image after any crop */
157 dcp::Size const cropped_size = crop.apply (size ());
159 /* Scale context for a scale from cropped_size to inter_size */
160 struct SwsContext* scale_context = sws_getContext (
161 cropped_size.width, cropped_size.height, pixel_format(),
162 inter_size.width, inter_size.height, out_format,
163 fast ? SWS_FAST_BILINEAR : SWS_BICUBIC, 0, 0, 0
166 if (!scale_context) {
167 throw runtime_error (N_("Could not allocate SwsContext"));
170 DCPOMATIC_ASSERT (yuv_to_rgb < dcp::YUV_TO_RGB_COUNT);
171 int const lut[dcp::YUV_TO_RGB_COUNT] = {
176 sws_setColorspaceDetails (
178 sws_getCoefficients (lut[yuv_to_rgb]), 0,
179 sws_getCoefficients (lut[yuv_to_rgb]), 0,
183 AVPixFmtDescriptor const * desc = av_pix_fmt_desc_get (_pixel_format);
185 throw PixelFormatError ("crop_scale_window()", _pixel_format);
188 /* Prepare input data pointers with crop */
189 uint8_t* scale_in_data[planes()];
190 for (int c = 0; c < planes(); ++c) {
191 /* To work out the crop in bytes, start by multiplying
192 the crop by the (average) bytes per pixel. Then
193 round down so that we don't crop a subsampled pixel until
194 we've cropped all of its Y-channel pixels.
196 int const x = lrintf (bytes_per_pixel(c) * crop.left) & ~ ((int) desc->log2_chroma_w);
197 scale_in_data[c] = data()[c] + x + stride()[c] * (crop.top / line_factor(c));
200 /* Corner of the image within out_size */
201 Position<int> const corner ((out_size.width - inter_size.width) / 2, (out_size.height - inter_size.height) / 2);
203 uint8_t* scale_out_data[out->planes()];
204 for (int c = 0; c < out->planes(); ++c) {
205 scale_out_data[c] = out->data()[c] + lrintf (out->bytes_per_pixel(c) * corner.x) + out->stride()[c] * corner.y;
210 scale_in_data, stride(),
211 0, cropped_size.height,
212 scale_out_data, out->stride()
215 sws_freeContext (scale_context);
220 /** @param fast Try to be fast at the possible expense of quality; at present this means using
221 * fast bilinear rather than bicubic scaling.
224 Image::scale (dcp::Size out_size, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, bool out_aligned, bool fast) const
226 /* Empirical testing suggests that sws_scale() will crash if
227 the input image is not aligned.
229 DCPOMATIC_ASSERT (aligned ());
231 shared_ptr<Image> scaled (new Image (out_format, out_size, out_aligned));
233 struct SwsContext* scale_context = sws_getContext (
234 size().width, size().height, pixel_format(),
235 out_size.width, out_size.height, out_format,
236 fast ? SWS_FAST_BILINEAR : SWS_BICUBIC, 0, 0, 0
239 DCPOMATIC_ASSERT (yuv_to_rgb < dcp::YUV_TO_RGB_COUNT);
240 int const lut[dcp::YUV_TO_RGB_COUNT] = {
245 sws_setColorspaceDetails (
247 sws_getCoefficients (lut[yuv_to_rgb]), 0,
248 sws_getCoefficients (lut[yuv_to_rgb]), 0,
256 scaled->data(), scaled->stride()
259 sws_freeContext (scale_context);
264 /** Blacken a YUV image whose bits per pixel is rounded up to 16 */
266 Image::yuv_16_black (uint16_t v, bool alpha)
268 memset (data()[0], 0, sample_size(0).height * stride()[0]);
269 for (int i = 1; i < 3; ++i) {
270 int16_t* p = reinterpret_cast<int16_t*> (data()[i]);
271 int const lines = sample_size(i).height;
272 for (int y = 0; y < lines; ++y) {
273 /* We divide by 2 here because we are writing 2 bytes at a time */
274 for (int x = 0; x < line_size()[i] / 2; ++x) {
277 p += stride()[i] / 2;
282 memset (data()[3], 0, sample_size(3).height * stride()[3]);
287 Image::swap_16 (uint16_t v)
289 return ((v >> 8) & 0xff) | ((v & 0xff) << 8);
295 /* U/V black value for 8-bit colour */
296 static uint8_t const eight_bit_uv = (1 << 7) - 1;
297 /* U/V black value for 9-bit colour */
298 static uint16_t const nine_bit_uv = (1 << 8) - 1;
299 /* U/V black value for 10-bit colour */
300 static uint16_t const ten_bit_uv = (1 << 9) - 1;
301 /* U/V black value for 16-bit colour */
302 static uint16_t const sixteen_bit_uv = (1 << 15) - 1;
304 switch (_pixel_format) {
305 case AV_PIX_FMT_YUV420P:
306 case AV_PIX_FMT_YUV422P:
307 case AV_PIX_FMT_YUV444P:
308 case AV_PIX_FMT_YUV411P:
309 memset (data()[0], 0, sample_size(0).height * stride()[0]);
310 memset (data()[1], eight_bit_uv, sample_size(1).height * stride()[1]);
311 memset (data()[2], eight_bit_uv, sample_size(2).height * stride()[2]);
314 case AV_PIX_FMT_YUVJ420P:
315 case AV_PIX_FMT_YUVJ422P:
316 case AV_PIX_FMT_YUVJ444P:
317 memset (data()[0], 0, sample_size(0).height * stride()[0]);
318 memset (data()[1], eight_bit_uv + 1, sample_size(1).height * stride()[1]);
319 memset (data()[2], eight_bit_uv + 1, sample_size(2).height * stride()[2]);
322 case AV_PIX_FMT_YUV422P9LE:
323 case AV_PIX_FMT_YUV444P9LE:
324 yuv_16_black (nine_bit_uv, false);
327 case AV_PIX_FMT_YUV422P9BE:
328 case AV_PIX_FMT_YUV444P9BE:
329 yuv_16_black (swap_16 (nine_bit_uv), false);
332 case AV_PIX_FMT_YUV422P10LE:
333 case AV_PIX_FMT_YUV444P10LE:
334 yuv_16_black (ten_bit_uv, false);
337 case AV_PIX_FMT_YUV422P16LE:
338 case AV_PIX_FMT_YUV444P16LE:
339 yuv_16_black (sixteen_bit_uv, false);
342 case AV_PIX_FMT_YUV444P10BE:
343 case AV_PIX_FMT_YUV422P10BE:
344 yuv_16_black (swap_16 (ten_bit_uv), false);
347 case AV_PIX_FMT_YUVA420P9BE:
348 case AV_PIX_FMT_YUVA422P9BE:
349 case AV_PIX_FMT_YUVA444P9BE:
350 yuv_16_black (swap_16 (nine_bit_uv), true);
353 case AV_PIX_FMT_YUVA420P9LE:
354 case AV_PIX_FMT_YUVA422P9LE:
355 case AV_PIX_FMT_YUVA444P9LE:
356 yuv_16_black (nine_bit_uv, true);
359 case AV_PIX_FMT_YUVA420P10BE:
360 case AV_PIX_FMT_YUVA422P10BE:
361 case AV_PIX_FMT_YUVA444P10BE:
362 yuv_16_black (swap_16 (ten_bit_uv), true);
365 case AV_PIX_FMT_YUVA420P10LE:
366 case AV_PIX_FMT_YUVA422P10LE:
367 case AV_PIX_FMT_YUVA444P10LE:
368 yuv_16_black (ten_bit_uv, true);
371 case AV_PIX_FMT_YUVA420P16BE:
372 case AV_PIX_FMT_YUVA422P16BE:
373 case AV_PIX_FMT_YUVA444P16BE:
374 yuv_16_black (swap_16 (sixteen_bit_uv), true);
377 case AV_PIX_FMT_YUVA420P16LE:
378 case AV_PIX_FMT_YUVA422P16LE:
379 case AV_PIX_FMT_YUVA444P16LE:
380 yuv_16_black (sixteen_bit_uv, true);
383 case AV_PIX_FMT_RGB24:
384 case AV_PIX_FMT_ARGB:
385 case AV_PIX_FMT_RGBA:
386 case AV_PIX_FMT_ABGR:
387 case AV_PIX_FMT_BGRA:
388 case AV_PIX_FMT_RGB555LE:
389 case AV_PIX_FMT_RGB48LE:
390 case AV_PIX_FMT_RGB48BE:
391 case AV_PIX_FMT_XYZ12LE:
392 memset (data()[0], 0, sample_size(0).height * stride()[0]);
395 case AV_PIX_FMT_UYVY422:
397 int const Y = sample_size(0).height;
398 int const X = line_size()[0];
399 uint8_t* p = data()[0];
400 for (int y = 0; y < Y; ++y) {
401 for (int x = 0; x < X / 4; ++x) {
402 *p++ = eight_bit_uv; // Cb
404 *p++ = eight_bit_uv; // Cr
412 throw PixelFormatError ("make_black()", _pixel_format);
417 Image::make_transparent ()
419 if (_pixel_format != AV_PIX_FMT_RGBA) {
420 throw PixelFormatError ("make_transparent()", _pixel_format);
423 memset (data()[0], 0, sample_size(0).height * stride()[0]);
427 Image::alpha_blend (shared_ptr<const Image> other, Position<int> position)
429 /* We're blending RGBA images; first byte is blue, second byte is green, third byte blue, fourth byte alpha */
430 DCPOMATIC_ASSERT (other->pixel_format() == AV_PIX_FMT_RGBA);
431 int const other_bpp = 4;
433 int start_tx = position.x;
437 start_ox = -start_tx;
441 int start_ty = position.y;
445 start_oy = -start_ty;
449 switch (_pixel_format) {
450 case AV_PIX_FMT_RGB24:
452 /* Going onto RGB24. First byte is red, second green, third blue */
453 int const this_bpp = 3;
454 for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
455 uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp;
456 uint8_t* op = other->data()[0] + oy * other->stride()[0];
457 for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
458 float const alpha = float (op[3]) / 255;
459 tp[0] = op[2] * alpha + tp[0] * (1 - alpha);
460 tp[1] = op[1] * alpha + tp[1] * (1 - alpha);
461 tp[2] = op[0] * alpha + tp[2] * (1 - alpha);
469 case AV_PIX_FMT_BGRA:
470 case AV_PIX_FMT_RGBA:
472 int const this_bpp = 4;
473 for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
474 uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp;
475 uint8_t* op = other->data()[0] + oy * other->stride()[0];
476 for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
477 float const alpha = float (op[3]) / 255;
478 tp[0] = op[0] * alpha + tp[0] * (1 - alpha);
479 tp[1] = op[1] * alpha + tp[1] * (1 - alpha);
480 tp[2] = op[2] * alpha + tp[2] * (1 - alpha);
481 tp[3] = op[3] * alpha + tp[3] * (1 - alpha);
489 case AV_PIX_FMT_RGB48LE:
491 int const this_bpp = 6;
492 for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
493 uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp;
494 uint8_t* op = other->data()[0] + oy * other->stride()[0];
495 for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
496 float const alpha = float (op[3]) / 255;
497 /* Blend high bytes; the RGBA in op appears to be BGRA */
498 tp[1] = op[2] * alpha + tp[1] * (1 - alpha);
499 tp[3] = op[1] * alpha + tp[3] * (1 - alpha);
500 tp[5] = op[0] * alpha + tp[5] * (1 - alpha);
508 case AV_PIX_FMT_XYZ12LE:
510 boost::numeric::ublas::matrix<double> matrix = dcp::ColourConversion::srgb_to_xyz().rgb_to_xyz();
511 int const this_bpp = 6;
512 for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
513 uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp;
514 uint8_t* op = other->data()[0] + oy * other->stride()[0];
515 for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
516 float const alpha = float (op[3]) / 255;
518 /* Convert sRGB to XYZ; op is BGRA */
519 int const x = matrix(0, 0) * op[2] + matrix(0, 1) * op[1] + matrix(0, 2) * op[0];
520 int const y = matrix(1, 0) * op[2] + matrix(1, 1) * op[1] + matrix(1, 2) * op[0];
521 int const z = matrix(2, 0) * op[2] + matrix(2, 1) * op[1] + matrix(2, 2) * op[0];
523 /* Blend high bytes */
524 tp[1] = min (x, 255) * alpha + tp[1] * (1 - alpha);
525 tp[3] = min (y, 255) * alpha + tp[3] * (1 - alpha);
526 tp[5] = min (z, 255) * alpha + tp[5] * (1 - alpha);
535 DCPOMATIC_ASSERT (false);
540 Image::copy (shared_ptr<const Image> other, Position<int> position)
542 /* Only implemented for RGB24 onto RGB24 so far */
543 DCPOMATIC_ASSERT (_pixel_format == AV_PIX_FMT_RGB24 && other->pixel_format() == AV_PIX_FMT_RGB24);
544 DCPOMATIC_ASSERT (position.x >= 0 && position.y >= 0);
546 int const N = min (position.x + other->size().width, size().width) - position.x;
547 for (int ty = position.y, oy = 0; ty < size().height && oy < other->size().height; ++ty, ++oy) {
548 uint8_t * const tp = data()[0] + ty * stride()[0] + position.x * 3;
549 uint8_t * const op = other->data()[0] + oy * other->stride()[0];
550 memcpy (tp, op, N * 3);
555 Image::read_from_socket (shared_ptr<Socket> socket)
557 for (int i = 0; i < planes(); ++i) {
558 uint8_t* p = data()[i];
559 int const lines = sample_size(i).height;
560 for (int y = 0; y < lines; ++y) {
561 socket->read (p, line_size()[i]);
568 Image::write_to_socket (shared_ptr<Socket> socket) const
570 for (int i = 0; i < planes(); ++i) {
571 uint8_t* p = data()[i];
572 int const lines = sample_size(i).height;
573 for (int y = 0; y < lines; ++y) {
574 socket->write (p, line_size()[i]);
581 Image::bytes_per_pixel (int c) const
583 AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
585 throw PixelFormatError ("bytes_per_pixel()", _pixel_format);
592 float bpp[4] = { 0, 0, 0, 0 };
594 #ifdef DCPOMATIC_HAVE_AVCOMPONENTDESCRIPTOR_DEPTH_MINUS1
595 bpp[0] = floor ((d->comp[0].depth_minus1 + 8) / 8);
596 if (d->nb_components > 1) {
597 bpp[1] = floor ((d->comp[1].depth_minus1 + 8) / 8) / pow (2.0f, d->log2_chroma_w);
599 if (d->nb_components > 2) {
600 bpp[2] = floor ((d->comp[2].depth_minus1 + 8) / 8) / pow (2.0f, d->log2_chroma_w);
602 if (d->nb_components > 3) {
603 bpp[3] = floor ((d->comp[3].depth_minus1 + 8) / 8) / pow (2.0f, d->log2_chroma_w);
606 bpp[0] = floor ((d->comp[0].depth + 7) / 8);
607 if (d->nb_components > 1) {
608 bpp[1] = floor ((d->comp[1].depth + 7) / 8) / pow (2.0f, d->log2_chroma_w);
610 if (d->nb_components > 2) {
611 bpp[2] = floor ((d->comp[2].depth + 7) / 8) / pow (2.0f, d->log2_chroma_w);
613 if (d->nb_components > 3) {
614 bpp[3] = floor ((d->comp[3].depth + 7) / 8) / pow (2.0f, d->log2_chroma_w);
618 if ((d->flags & AV_PIX_FMT_FLAG_PLANAR) == 0) {
619 /* Not planar; sum them up */
620 return bpp[0] + bpp[1] + bpp[2] + bpp[3];
626 /** Construct a Image of a given size and format, allocating memory
629 * @param p Pixel format.
630 * @param s Size in pixels.
631 * @param extra_pixels Amount of extra "run-off" memory to allocate at the end of each plane in pixels.
633 Image::Image (AVPixelFormat p, dcp::Size s, bool aligned, int extra_pixels)
637 , _extra_pixels (extra_pixels)
645 _data = (uint8_t **) wrapped_av_malloc (4 * sizeof (uint8_t *));
646 _data[0] = _data[1] = _data[2] = _data[3] = 0;
648 _line_size = (int *) wrapped_av_malloc (4 * sizeof (int));
649 _line_size[0] = _line_size[1] = _line_size[2] = _line_size[3] = 0;
651 _stride = (int *) wrapped_av_malloc (4 * sizeof (int));
652 _stride[0] = _stride[1] = _stride[2] = _stride[3] = 0;
654 for (int i = 0; i < planes(); ++i) {
655 _line_size[i] = ceil (_size.width * bytes_per_pixel(i));
656 _stride[i] = stride_round_up (i, _line_size, _aligned ? 32 : 1);
658 /* The assembler function ff_rgb24ToY_avx (in libswscale/x86/input.asm)
659 uses a 16-byte fetch to read three bytes (R/G/B) of image data.
660 Hence on the last pixel of the last line it reads over the end of
661 the actual data by 1 byte. If the width of an image is a multiple
662 of the stride alignment there will be no padding at the end of image lines.
663 OS X crashes on this illegal read, though other operating systems don't
664 seem to mind. The nasty + 1 in this malloc makes sure there is always a byte
665 for that instruction to read safely.
667 Further to the above, valgrind is now telling me that ff_rgb24ToY_ssse3
668 over-reads by more then _avx. I can't follow the code to work out how much,
669 so I'll just over-allocate by 32 bytes and have done with it. Empirical
670 testing suggests that it works.
672 _data[i] = (uint8_t *) wrapped_av_malloc (_stride[i] * sample_size(i).height + _extra_pixels * bytes_per_pixel(i) + 32);
676 Image::Image (Image const & other)
677 : _size (other._size)
678 , _pixel_format (other._pixel_format)
679 , _aligned (other._aligned)
680 , _extra_pixels (other._extra_pixels)
684 for (int i = 0; i < planes(); ++i) {
685 uint8_t* p = _data[i];
686 uint8_t* q = other._data[i];
687 int const lines = sample_size(i).height;
688 for (int j = 0; j < lines; ++j) {
689 memcpy (p, q, _line_size[i]);
691 q += other.stride()[i];
696 Image::Image (AVFrame* frame)
697 : _size (frame->width, frame->height)
698 , _pixel_format (static_cast<AVPixelFormat> (frame->format))
704 for (int i = 0; i < planes(); ++i) {
705 uint8_t* p = _data[i];
706 uint8_t* q = frame->data[i];
707 int const lines = sample_size(i).height;
708 for (int j = 0; j < lines; ++j) {
709 memcpy (p, q, _line_size[i]);
711 /* AVFrame's linesize is what we call `stride' */
712 q += frame->linesize[i];
717 Image::Image (shared_ptr<const Image> other, bool aligned)
718 : _size (other->_size)
719 , _pixel_format (other->_pixel_format)
721 , _extra_pixels (other->_extra_pixels)
725 for (int i = 0; i < planes(); ++i) {
726 DCPOMATIC_ASSERT (line_size()[i] == other->line_size()[i]);
727 uint8_t* p = _data[i];
728 uint8_t* q = other->data()[i];
729 int const lines = sample_size(i).height;
730 for (int j = 0; j < lines; ++j) {
731 memcpy (p, q, line_size()[i]);
733 q += other->stride()[i];
739 Image::operator= (Image const & other)
741 if (this == &other) {
751 Image::swap (Image & other)
753 std::swap (_size, other._size);
754 std::swap (_pixel_format, other._pixel_format);
756 for (int i = 0; i < 4; ++i) {
757 std::swap (_data[i], other._data[i]);
758 std::swap (_line_size[i], other._line_size[i]);
759 std::swap (_stride[i], other._stride[i]);
762 std::swap (_aligned, other._aligned);
765 /** Destroy a Image */
768 for (int i = 0; i < planes(); ++i) {
773 av_free (_line_size);
784 Image::line_size () const
790 Image::stride () const
802 Image::aligned () const
808 merge (list<PositionImage> images)
810 if (images.empty ()) {
811 return PositionImage ();
814 if (images.size() == 1) {
815 return images.front ();
818 dcpomatic::Rect<int> all (images.front().position, images.front().image->size().width, images.front().image->size().height);
819 for (list<PositionImage>::const_iterator i = images.begin(); i != images.end(); ++i) {
820 all.extend (dcpomatic::Rect<int> (i->position, i->image->size().width, i->image->size().height));
823 shared_ptr<Image> merged (new Image (images.front().image->pixel_format (), dcp::Size (all.width, all.height), true));
824 merged->make_transparent ();
825 for (list<PositionImage>::const_iterator i = images.begin(); i != images.end(); ++i) {
826 merged->alpha_blend (i->image, i->position - all.position());
829 return PositionImage (merged, all.position ());
833 operator== (Image const & a, Image const & b)
835 if (a.planes() != b.planes() || a.pixel_format() != b.pixel_format() || a.aligned() != b.aligned()) {
839 for (int c = 0; c < a.planes(); ++c) {
840 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]) {
844 uint8_t* p = a.data()[c];
845 uint8_t* q = b.data()[c];
846 int const lines = a.sample_size(c).height;
847 for (int y = 0; y < lines; ++y) {
848 if (memcmp (p, q, a.line_size()[c]) != 0) {
861 * @param f Amount to fade by; 0 is black, 1 is no fade.
864 Image::fade (float f)
866 switch (_pixel_format) {
867 case AV_PIX_FMT_YUV420P:
868 case AV_PIX_FMT_YUV422P:
869 case AV_PIX_FMT_YUV444P:
870 case AV_PIX_FMT_YUV411P:
871 case AV_PIX_FMT_YUVJ420P:
872 case AV_PIX_FMT_YUVJ422P:
873 case AV_PIX_FMT_YUVJ444P:
874 case AV_PIX_FMT_RGB24:
875 case AV_PIX_FMT_ARGB:
876 case AV_PIX_FMT_RGBA:
877 case AV_PIX_FMT_ABGR:
878 case AV_PIX_FMT_BGRA:
879 case AV_PIX_FMT_RGB555LE:
881 for (int c = 0; c < 3; ++c) {
882 uint8_t* p = data()[c];
883 int const lines = sample_size(c).height;
884 for (int y = 0; y < lines; ++y) {
886 for (int x = 0; x < line_size()[c]; ++x) {
887 *q = int (float (*q) * f);
895 case AV_PIX_FMT_YUV422P9LE:
896 case AV_PIX_FMT_YUV444P9LE:
897 case AV_PIX_FMT_YUV422P10LE:
898 case AV_PIX_FMT_YUV444P10LE:
899 case AV_PIX_FMT_YUV422P16LE:
900 case AV_PIX_FMT_YUV444P16LE:
901 case AV_PIX_FMT_YUVA420P9LE:
902 case AV_PIX_FMT_YUVA422P9LE:
903 case AV_PIX_FMT_YUVA444P9LE:
904 case AV_PIX_FMT_YUVA420P10LE:
905 case AV_PIX_FMT_YUVA422P10LE:
906 case AV_PIX_FMT_YUVA444P10LE:
907 case AV_PIX_FMT_RGB48LE:
908 case AV_PIX_FMT_XYZ12LE:
909 /* 16-bit little-endian */
910 for (int c = 0; c < 3; ++c) {
911 int const stride_pixels = stride()[c] / 2;
912 int const line_size_pixels = line_size()[c] / 2;
913 uint16_t* p = reinterpret_cast<uint16_t*> (data()[c]);
914 int const lines = sample_size(c).height;
915 for (int y = 0; y < lines; ++y) {
917 for (int x = 0; x < line_size_pixels; ++x) {
918 *q = int (float (*q) * f);
926 case AV_PIX_FMT_YUV422P9BE:
927 case AV_PIX_FMT_YUV444P9BE:
928 case AV_PIX_FMT_YUV444P10BE:
929 case AV_PIX_FMT_YUV422P10BE:
930 case AV_PIX_FMT_YUVA420P9BE:
931 case AV_PIX_FMT_YUVA422P9BE:
932 case AV_PIX_FMT_YUVA444P9BE:
933 case AV_PIX_FMT_YUVA420P10BE:
934 case AV_PIX_FMT_YUVA422P10BE:
935 case AV_PIX_FMT_YUVA444P10BE:
936 case AV_PIX_FMT_YUVA420P16BE:
937 case AV_PIX_FMT_YUVA422P16BE:
938 case AV_PIX_FMT_YUVA444P16BE:
939 case AV_PIX_FMT_RGB48BE:
940 /* 16-bit big-endian */
941 for (int c = 0; c < 3; ++c) {
942 int const stride_pixels = stride()[c] / 2;
943 int const line_size_pixels = line_size()[c] / 2;
944 uint16_t* p = reinterpret_cast<uint16_t*> (data()[c]);
945 int const lines = sample_size(c).height;
946 for (int y = 0; y < lines; ++y) {
948 for (int x = 0; x < line_size_pixels; ++x) {
949 *q = swap_16 (int (float (swap_16 (*q)) * f));
957 case AV_PIX_FMT_UYVY422:
959 int const Y = sample_size(0).height;
960 int const X = line_size()[0];
961 uint8_t* p = data()[0];
962 for (int y = 0; y < Y; ++y) {
963 for (int x = 0; x < X; ++x) {
964 *p = int (float (*p) * f);
972 throw PixelFormatError ("fade()", _pixel_format);