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"
31 #include <dcp/rgb_xyz.h>
32 #include <dcp/transfer_function.h>
34 #include <libswscale/swscale.h>
35 #include <libavutil/pixfmt.h>
36 #include <libavutil/pixdesc.h>
37 #include <libavutil/frame.h>
49 using std::runtime_error;
50 using boost::shared_ptr;
54 Image::line_factor (int n) const
60 AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
62 throw PixelFormatError ("line_factor()", _pixel_format);
65 return pow (2.0f, d->log2_chroma_h);
68 /** @param n Component index.
69 * @return Number of samples (i.e. pixels, unless sub-sampled) in each direction for this component.
72 Image::sample_size (int n) const
74 int horizontal_factor = 1;
76 AVPixFmtDescriptor const * d = av_pix_fmt_desc_get (_pixel_format);
78 throw PixelFormatError ("sample_size()", _pixel_format);
80 horizontal_factor = pow (2.0f, d->log2_chroma_w);
84 lrint (ceil (static_cast<double>(size().width) / horizontal_factor)),
85 lrint (ceil (static_cast<double>(size().height) / line_factor (n)))
89 /** @return Number of planes */
91 Image::planes () const
93 AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
95 throw PixelFormatError ("planes()", _pixel_format);
98 if ((d->flags & AV_PIX_FMT_FLAG_PLANAR) == 0) {
102 return d->nb_components;
105 /** Crop this image, scale it to `inter_size' and then place it in a black frame of `out_size'.
106 * @param fast Try to be fast at the possible expense of quality; at present this means using
107 * fast bilinear rather than bicubic scaling.
110 Image::crop_scale_window (
111 Crop crop, dcp::Size inter_size, dcp::Size out_size, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, bool out_aligned, bool fast
114 /* Empirical testing suggests that sws_scale() will crash if
115 the input image is not aligned.
117 DCPOMATIC_ASSERT (aligned ());
119 DCPOMATIC_ASSERT (out_size.width >= inter_size.width);
120 DCPOMATIC_ASSERT (out_size.height >= inter_size.height);
122 /* Here's an image of out_size. Below we may write to it starting at an offset so we get some padding.
123 Hence we want to write in the following pattern:
125 block start write start line end
126 |..(padding)..|<------line-size------------->|..(padding)..|
127 |..(padding)..|<------line-size------------->|..(padding)..|
128 |..(padding)..|<------line-size------------->|..(padding)..|
130 where line-size is of the smaller (inter_size) image and the full padded line length is that of
131 out_size. To get things to work we have to tell FFmpeg that the stride is that of out_size.
132 However some parts of FFmpeg (notably rgb48Toxyz12 in swscale.c) process data for the full
133 specified *stride*. This does not matter until we get to the last line:
135 block start write start line end
136 |..(padding)..|<------line-size------------->|XXXwrittenXXX|
137 |XXXwrittenXXX|<------line-size------------->|XXXwrittenXXX|
138 |XXXwrittenXXX|<------line-size------------->|XXXwrittenXXXXXXwrittenXXX
141 To get around this, we ask Image to overallocate its buffers by the overrun.
144 shared_ptr<Image> out (new Image (out_format, out_size, out_aligned, (out_size.width - inter_size.width) / 2));
147 /* Size of the image after any crop */
148 dcp::Size const cropped_size = crop.apply (size ());
150 /* Scale context for a scale from cropped_size to inter_size */
151 struct SwsContext* scale_context = sws_getContext (
152 cropped_size.width, cropped_size.height, pixel_format(),
153 inter_size.width, inter_size.height, out_format,
154 fast ? SWS_FAST_BILINEAR : SWS_BICUBIC, 0, 0, 0
157 if (!scale_context) {
158 throw runtime_error (N_("Could not allocate SwsContext"));
161 DCPOMATIC_ASSERT (yuv_to_rgb < dcp::YUV_TO_RGB_COUNT);
162 int const lut[dcp::YUV_TO_RGB_COUNT] = {
167 sws_setColorspaceDetails (
169 sws_getCoefficients (lut[yuv_to_rgb]), 0,
170 sws_getCoefficients (lut[yuv_to_rgb]), 0,
174 AVPixFmtDescriptor const * desc = av_pix_fmt_desc_get (_pixel_format);
176 throw PixelFormatError ("crop_scale_window()", _pixel_format);
179 /* Prepare input data pointers with crop */
180 uint8_t* scale_in_data[planes()];
181 for (int c = 0; c < planes(); ++c) {
182 /* To work out the crop in bytes, start by multiplying
183 the crop by the (average) bytes per pixel. Then
184 round down so that we don't crop a subsampled pixel until
185 we've cropped all of its Y-channel pixels.
187 int const x = lrintf (bytes_per_pixel(c) * crop.left) & ~ ((int) desc->log2_chroma_w);
188 scale_in_data[c] = data()[c] + x + stride()[c] * (crop.top / line_factor(c));
191 /* Corner of the image within out_size */
192 Position<int> const corner ((out_size.width - inter_size.width) / 2, (out_size.height - inter_size.height) / 2);
194 uint8_t* scale_out_data[out->planes()];
195 for (int c = 0; c < out->planes(); ++c) {
196 scale_out_data[c] = out->data()[c] + lrintf (out->bytes_per_pixel(c) * corner.x) + out->stride()[c] * corner.y;
201 scale_in_data, stride(),
202 0, cropped_size.height,
203 scale_out_data, out->stride()
206 sws_freeContext (scale_context);
211 /** @param fast Try to be fast at the possible expense of quality; at present this means using
212 * fast bilinear rather than bicubic scaling.
215 Image::scale (dcp::Size out_size, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, bool out_aligned, bool fast) const
217 /* Empirical testing suggests that sws_scale() will crash if
218 the input image is not aligned.
220 DCPOMATIC_ASSERT (aligned ());
222 shared_ptr<Image> scaled (new Image (out_format, out_size, out_aligned));
224 struct SwsContext* scale_context = sws_getContext (
225 size().width, size().height, pixel_format(),
226 out_size.width, out_size.height, out_format,
227 fast ? SWS_FAST_BILINEAR : SWS_BICUBIC, 0, 0, 0
230 DCPOMATIC_ASSERT (yuv_to_rgb < dcp::YUV_TO_RGB_COUNT);
231 int const lut[dcp::YUV_TO_RGB_COUNT] = {
236 sws_setColorspaceDetails (
238 sws_getCoefficients (lut[yuv_to_rgb]), 0,
239 sws_getCoefficients (lut[yuv_to_rgb]), 0,
247 scaled->data(), scaled->stride()
250 sws_freeContext (scale_context);
255 /** Blacken a YUV image whose bits per pixel is rounded up to 16 */
257 Image::yuv_16_black (uint16_t v, bool alpha)
259 memset (data()[0], 0, sample_size(0).height * stride()[0]);
260 for (int i = 1; i < 3; ++i) {
261 int16_t* p = reinterpret_cast<int16_t*> (data()[i]);
262 int const lines = sample_size(i).height;
263 for (int y = 0; y < lines; ++y) {
264 /* We divide by 2 here because we are writing 2 bytes at a time */
265 for (int x = 0; x < line_size()[i] / 2; ++x) {
268 p += stride()[i] / 2;
273 memset (data()[3], 0, sample_size(3).height * stride()[3]);
278 Image::swap_16 (uint16_t v)
280 return ((v >> 8) & 0xff) | ((v & 0xff) << 8);
286 /* U/V black value for 8-bit colour */
287 static uint8_t const eight_bit_uv = (1 << 7) - 1;
288 /* U/V black value for 9-bit colour */
289 static uint16_t const nine_bit_uv = (1 << 8) - 1;
290 /* U/V black value for 10-bit colour */
291 static uint16_t const ten_bit_uv = (1 << 9) - 1;
292 /* U/V black value for 16-bit colour */
293 static uint16_t const sixteen_bit_uv = (1 << 15) - 1;
295 switch (_pixel_format) {
296 case AV_PIX_FMT_YUV420P:
297 case AV_PIX_FMT_YUV422P:
298 case AV_PIX_FMT_YUV444P:
299 case AV_PIX_FMT_YUV411P:
300 memset (data()[0], 0, sample_size(0).height * stride()[0]);
301 memset (data()[1], eight_bit_uv, sample_size(1).height * stride()[1]);
302 memset (data()[2], eight_bit_uv, sample_size(2).height * stride()[2]);
305 case AV_PIX_FMT_YUVJ420P:
306 case AV_PIX_FMT_YUVJ422P:
307 case AV_PIX_FMT_YUVJ444P:
308 memset (data()[0], 0, sample_size(0).height * stride()[0]);
309 memset (data()[1], eight_bit_uv + 1, sample_size(1).height * stride()[1]);
310 memset (data()[2], eight_bit_uv + 1, sample_size(2).height * stride()[2]);
313 case AV_PIX_FMT_YUV422P9LE:
314 case AV_PIX_FMT_YUV444P9LE:
315 yuv_16_black (nine_bit_uv, false);
318 case AV_PIX_FMT_YUV422P9BE:
319 case AV_PIX_FMT_YUV444P9BE:
320 yuv_16_black (swap_16 (nine_bit_uv), false);
323 case AV_PIX_FMT_YUV422P10LE:
324 case AV_PIX_FMT_YUV444P10LE:
325 yuv_16_black (ten_bit_uv, false);
328 case AV_PIX_FMT_YUV422P16LE:
329 case AV_PIX_FMT_YUV444P16LE:
330 yuv_16_black (sixteen_bit_uv, false);
333 case AV_PIX_FMT_YUV444P10BE:
334 case AV_PIX_FMT_YUV422P10BE:
335 yuv_16_black (swap_16 (ten_bit_uv), false);
338 case AV_PIX_FMT_YUVA420P9BE:
339 case AV_PIX_FMT_YUVA422P9BE:
340 case AV_PIX_FMT_YUVA444P9BE:
341 yuv_16_black (swap_16 (nine_bit_uv), true);
344 case AV_PIX_FMT_YUVA420P9LE:
345 case AV_PIX_FMT_YUVA422P9LE:
346 case AV_PIX_FMT_YUVA444P9LE:
347 yuv_16_black (nine_bit_uv, true);
350 case AV_PIX_FMT_YUVA420P10BE:
351 case AV_PIX_FMT_YUVA422P10BE:
352 case AV_PIX_FMT_YUVA444P10BE:
353 yuv_16_black (swap_16 (ten_bit_uv), true);
356 case AV_PIX_FMT_YUVA420P10LE:
357 case AV_PIX_FMT_YUVA422P10LE:
358 case AV_PIX_FMT_YUVA444P10LE:
359 yuv_16_black (ten_bit_uv, true);
362 case AV_PIX_FMT_YUVA420P16BE:
363 case AV_PIX_FMT_YUVA422P16BE:
364 case AV_PIX_FMT_YUVA444P16BE:
365 yuv_16_black (swap_16 (sixteen_bit_uv), true);
368 case AV_PIX_FMT_YUVA420P16LE:
369 case AV_PIX_FMT_YUVA422P16LE:
370 case AV_PIX_FMT_YUVA444P16LE:
371 yuv_16_black (sixteen_bit_uv, true);
374 case AV_PIX_FMT_RGB24:
375 case AV_PIX_FMT_ARGB:
376 case AV_PIX_FMT_RGBA:
377 case AV_PIX_FMT_ABGR:
378 case AV_PIX_FMT_BGRA:
379 case AV_PIX_FMT_RGB555LE:
380 case AV_PIX_FMT_RGB48LE:
381 case AV_PIX_FMT_RGB48BE:
382 case AV_PIX_FMT_XYZ12LE:
383 memset (data()[0], 0, sample_size(0).height * stride()[0]);
386 case AV_PIX_FMT_UYVY422:
388 int const Y = sample_size(0).height;
389 int const X = line_size()[0];
390 uint8_t* p = data()[0];
391 for (int y = 0; y < Y; ++y) {
392 for (int x = 0; x < X / 4; ++x) {
393 *p++ = eight_bit_uv; // Cb
395 *p++ = eight_bit_uv; // Cr
403 throw PixelFormatError ("make_black()", _pixel_format);
408 Image::make_transparent ()
410 if (_pixel_format != AV_PIX_FMT_RGBA) {
411 throw PixelFormatError ("make_transparent()", _pixel_format);
414 memset (data()[0], 0, sample_size(0).height * stride()[0]);
418 Image::alpha_blend (shared_ptr<const Image> other, Position<int> position)
420 /* We're blending RGBA images; first byte is blue, second byte is green, third byte blue, fourth byte alpha */
421 DCPOMATIC_ASSERT (other->pixel_format() == AV_PIX_FMT_RGBA);
422 int const other_bpp = 4;
424 int start_tx = position.x;
428 start_ox = -start_tx;
432 int start_ty = position.y;
436 start_oy = -start_ty;
440 switch (_pixel_format) {
441 case AV_PIX_FMT_RGB24:
443 /* Going onto RGB24. First byte is red, second green, third blue */
444 int const this_bpp = 3;
445 for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
446 uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp;
447 uint8_t* op = other->data()[0] + oy * other->stride()[0];
448 for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
449 float const alpha = float (op[3]) / 255;
450 tp[0] = op[2] * alpha + tp[0] * (1 - alpha);
451 tp[1] = op[1] * alpha + tp[1] * (1 - alpha);
452 tp[2] = op[0] * alpha + tp[2] * (1 - alpha);
460 case AV_PIX_FMT_BGRA:
461 case AV_PIX_FMT_RGBA:
463 int const this_bpp = 4;
464 for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
465 uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp;
466 uint8_t* op = other->data()[0] + oy * other->stride()[0];
467 for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
468 float const alpha = float (op[3]) / 255;
469 tp[0] = op[0] * alpha + tp[0] * (1 - alpha);
470 tp[1] = op[1] * alpha + tp[1] * (1 - alpha);
471 tp[2] = op[2] * alpha + tp[2] * (1 - alpha);
472 tp[3] = op[3] * alpha + tp[3] * (1 - alpha);
480 case AV_PIX_FMT_RGB48LE:
482 int const this_bpp = 6;
483 for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
484 uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp;
485 uint8_t* op = other->data()[0] + oy * other->stride()[0];
486 for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
487 float const alpha = float (op[3]) / 255;
488 /* Blend high bytes; the RGBA in op appears to be BGRA */
489 tp[1] = op[2] * alpha + tp[1] * (1 - alpha);
490 tp[3] = op[1] * alpha + tp[3] * (1 - alpha);
491 tp[5] = op[0] * alpha + tp[5] * (1 - alpha);
499 case AV_PIX_FMT_XYZ12LE:
501 dcp::ColourConversion conv = dcp::ColourConversion::srgb_to_xyz();
502 double fast_matrix[9];
503 dcp::combined_rgb_to_xyz (conv, fast_matrix);
504 double const * lut_in = conv.in()->lut (8, false);
505 double const * lut_out = conv.out()->lut (16, true);
506 int const this_bpp = 6;
507 for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
508 uint16_t* tp = reinterpret_cast<uint16_t*> (data()[0] + ty * stride()[0] + start_tx * this_bpp);
509 uint8_t* op = other->data()[0] + oy * other->stride()[0];
510 for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
511 float const alpha = float (op[3]) / 255;
513 /* Convert sRGB to XYZ; op is BGRA. First, input gamma LUT */
514 double const r = lut_in[op[2]];
515 double const g = lut_in[op[1]];
516 double const b = lut_in[op[0]];
518 /* RGB to XYZ, including Bradford transform and DCI companding */
519 double const x = max (0.0, min (65535.0, r * fast_matrix[0] + g * fast_matrix[1] + b * fast_matrix[2]));
520 double const y = max (0.0, min (65535.0, r * fast_matrix[3] + g * fast_matrix[4] + b * fast_matrix[5]));
521 double const z = max (0.0, min (65535.0, r * fast_matrix[6] + g * fast_matrix[7] + b * fast_matrix[8]));
523 /* Out gamma LUT and blend */
524 tp[0] = lrint(lut_out[lrint(x)] * 65535) * alpha + tp[0] * (1 - alpha);
525 tp[1] = lrint(lut_out[lrint(y)] * 65535) * alpha + tp[1] * (1 - alpha);
526 tp[2] = lrint(lut_out[lrint(z)] * 65535) * alpha + tp[2] * (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);
763 std::swap (_extra_pixels, other._extra_pixels);
766 /** Destroy a Image */
769 for (int i = 0; i < planes(); ++i) {
774 av_free (_line_size);
785 Image::line_size () const
791 Image::stride () const
803 Image::aligned () const
809 merge (list<PositionImage> images)
811 if (images.empty ()) {
812 return PositionImage ();
815 if (images.size() == 1) {
816 return images.front ();
819 dcpomatic::Rect<int> all (images.front().position, images.front().image->size().width, images.front().image->size().height);
820 for (list<PositionImage>::const_iterator i = images.begin(); i != images.end(); ++i) {
821 all.extend (dcpomatic::Rect<int> (i->position, i->image->size().width, i->image->size().height));
824 shared_ptr<Image> merged (new Image (images.front().image->pixel_format (), dcp::Size (all.width, all.height), true));
825 merged->make_transparent ();
826 for (list<PositionImage>::const_iterator i = images.begin(); i != images.end(); ++i) {
827 merged->alpha_blend (i->image, i->position - all.position());
830 return PositionImage (merged, all.position ());
834 operator== (Image const & a, Image const & b)
836 if (a.planes() != b.planes() || a.pixel_format() != b.pixel_format() || a.aligned() != b.aligned()) {
840 for (int c = 0; c < a.planes(); ++c) {
841 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]) {
845 uint8_t* p = a.data()[c];
846 uint8_t* q = b.data()[c];
847 int const lines = a.sample_size(c).height;
848 for (int y = 0; y < lines; ++y) {
849 if (memcmp (p, q, a.line_size()[c]) != 0) {
862 * @param f Amount to fade by; 0 is black, 1 is no fade.
865 Image::fade (float f)
867 switch (_pixel_format) {
868 case AV_PIX_FMT_YUV420P:
869 case AV_PIX_FMT_YUV422P:
870 case AV_PIX_FMT_YUV444P:
871 case AV_PIX_FMT_YUV411P:
872 case AV_PIX_FMT_YUVJ420P:
873 case AV_PIX_FMT_YUVJ422P:
874 case AV_PIX_FMT_YUVJ444P:
875 case AV_PIX_FMT_RGB24:
876 case AV_PIX_FMT_ARGB:
877 case AV_PIX_FMT_RGBA:
878 case AV_PIX_FMT_ABGR:
879 case AV_PIX_FMT_BGRA:
880 case AV_PIX_FMT_RGB555LE:
882 for (int c = 0; c < 3; ++c) {
883 uint8_t* p = data()[c];
884 int const lines = sample_size(c).height;
885 for (int y = 0; y < lines; ++y) {
887 for (int x = 0; x < line_size()[c]; ++x) {
888 *q = int (float (*q) * f);
896 case AV_PIX_FMT_YUV422P9LE:
897 case AV_PIX_FMT_YUV444P9LE:
898 case AV_PIX_FMT_YUV422P10LE:
899 case AV_PIX_FMT_YUV444P10LE:
900 case AV_PIX_FMT_YUV422P16LE:
901 case AV_PIX_FMT_YUV444P16LE:
902 case AV_PIX_FMT_YUVA420P9LE:
903 case AV_PIX_FMT_YUVA422P9LE:
904 case AV_PIX_FMT_YUVA444P9LE:
905 case AV_PIX_FMT_YUVA420P10LE:
906 case AV_PIX_FMT_YUVA422P10LE:
907 case AV_PIX_FMT_YUVA444P10LE:
908 case AV_PIX_FMT_RGB48LE:
909 case AV_PIX_FMT_XYZ12LE:
910 /* 16-bit little-endian */
911 for (int c = 0; c < 3; ++c) {
912 int const stride_pixels = stride()[c] / 2;
913 int const line_size_pixels = line_size()[c] / 2;
914 uint16_t* p = reinterpret_cast<uint16_t*> (data()[c]);
915 int const lines = sample_size(c).height;
916 for (int y = 0; y < lines; ++y) {
918 for (int x = 0; x < line_size_pixels; ++x) {
919 *q = int (float (*q) * f);
927 case AV_PIX_FMT_YUV422P9BE:
928 case AV_PIX_FMT_YUV444P9BE:
929 case AV_PIX_FMT_YUV444P10BE:
930 case AV_PIX_FMT_YUV422P10BE:
931 case AV_PIX_FMT_YUVA420P9BE:
932 case AV_PIX_FMT_YUVA422P9BE:
933 case AV_PIX_FMT_YUVA444P9BE:
934 case AV_PIX_FMT_YUVA420P10BE:
935 case AV_PIX_FMT_YUVA422P10BE:
936 case AV_PIX_FMT_YUVA444P10BE:
937 case AV_PIX_FMT_YUVA420P16BE:
938 case AV_PIX_FMT_YUVA422P16BE:
939 case AV_PIX_FMT_YUVA444P16BE:
940 case AV_PIX_FMT_RGB48BE:
941 /* 16-bit big-endian */
942 for (int c = 0; c < 3; ++c) {
943 int const stride_pixels = stride()[c] / 2;
944 int const line_size_pixels = line_size()[c] / 2;
945 uint16_t* p = reinterpret_cast<uint16_t*> (data()[c]);
946 int const lines = sample_size(c).height;
947 for (int y = 0; y < lines; ++y) {
949 for (int x = 0; x < line_size_pixels; ++x) {
950 *q = swap_16 (int (float (swap_16 (*q)) * f));
958 case AV_PIX_FMT_UYVY422:
960 int const Y = sample_size(0).height;
961 int const X = line_size()[0];
962 uint8_t* p = data()[0];
963 for (int y = 0; y < Y; ++y) {
964 for (int x = 0; x < X; ++x) {
965 *p = int (float (*p) * f);
973 throw PixelFormatError ("fade()", _pixel_format);