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)))
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'.
114 * @param fast Try to be fast at the possible expense of quality; at present this means using
115 * fast bilinear rather than bicubic scaling.
118 Image::crop_scale_window (
119 Crop crop, dcp::Size inter_size, dcp::Size out_size, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, bool out_aligned, bool fast
122 /* Empirical testing suggests that sws_scale() will crash if
123 the input image is not aligned.
125 DCPOMATIC_ASSERT (aligned ());
127 DCPOMATIC_ASSERT (out_size.width >= inter_size.width);
128 DCPOMATIC_ASSERT (out_size.height >= inter_size.height);
130 /* Here's an image of out_size. Below we may write to it starting at an offset so we get some padding.
131 Hence we want to write in the following pattern:
133 block start write start line end
134 |..(padding)..|<------line-size------------->|..(padding)..|
135 |..(padding)..|<------line-size------------->|..(padding)..|
136 |..(padding)..|<------line-size------------->|..(padding)..|
138 where line-size is of the smaller (inter_size) image and the full padded line length is that of
139 out_size. To get things to work we have to tell FFmpeg that the stride is that of out_size.
140 However some parts of FFmpeg (notably rgb48Toxyz12 in swscale.c) process data for the full
141 specified *stride*. This does not matter until we get to the last line:
143 block start write start line end
144 |..(padding)..|<------line-size------------->|XXXwrittenXXX|
145 |XXXwrittenXXX|<------line-size------------->|XXXwrittenXXX|
146 |XXXwrittenXXX|<------line-size------------->|XXXwrittenXXXXXXwrittenXXX
149 To get around this, we ask Image to overallocate its buffers by the overrun.
152 shared_ptr<Image> out (new Image (out_format, out_size, out_aligned, (out_size.width - inter_size.width) / 2));
155 /* Size of the image after any crop */
156 dcp::Size const cropped_size = crop.apply (size ());
158 /* Scale context for a scale from cropped_size to inter_size */
159 struct SwsContext* scale_context = sws_getContext (
160 cropped_size.width, cropped_size.height, pixel_format(),
161 inter_size.width, inter_size.height, out_format,
162 fast ? SWS_FAST_BILINEAR : SWS_BICUBIC, 0, 0, 0
165 if (!scale_context) {
166 throw runtime_error (N_("Could not allocate SwsContext"));
169 DCPOMATIC_ASSERT (yuv_to_rgb < dcp::YUV_TO_RGB_COUNT);
170 int const lut[dcp::YUV_TO_RGB_COUNT] = {
175 sws_setColorspaceDetails (
177 sws_getCoefficients (lut[yuv_to_rgb]), 0,
178 sws_getCoefficients (lut[yuv_to_rgb]), 0,
182 AVPixFmtDescriptor const * desc = av_pix_fmt_desc_get (_pixel_format);
184 throw PixelFormatError ("crop_scale_window()", _pixel_format);
187 /* Prepare input data pointers with crop */
188 uint8_t* scale_in_data[planes()];
189 for (int c = 0; c < planes(); ++c) {
190 /* To work out the crop in bytes, start by multiplying
191 the crop by the (average) bytes per pixel. Then
192 round down so that we don't crop a subsampled pixel until
193 we've cropped all of its Y-channel pixels.
195 int const x = lrintf (bytes_per_pixel(c) * crop.left) & ~ ((int) desc->log2_chroma_w);
196 scale_in_data[c] = data()[c] + x + stride()[c] * (crop.top / line_factor(c));
199 /* Corner of the image within out_size */
200 Position<int> const corner ((out_size.width - inter_size.width) / 2, (out_size.height - inter_size.height) / 2);
202 uint8_t* scale_out_data[out->planes()];
203 for (int c = 0; c < out->planes(); ++c) {
204 scale_out_data[c] = out->data()[c] + lrintf (out->bytes_per_pixel(c) * corner.x) + out->stride()[c] * corner.y;
209 scale_in_data, stride(),
210 0, cropped_size.height,
211 scale_out_data, out->stride()
214 sws_freeContext (scale_context);
219 /** @param fast Try to be fast at the possible expense of quality; at present this means using
220 * fast bilinear rather than bicubic scaling.
223 Image::scale (dcp::Size out_size, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, bool out_aligned, bool fast) const
225 /* Empirical testing suggests that sws_scale() will crash if
226 the input image is not aligned.
228 DCPOMATIC_ASSERT (aligned ());
230 shared_ptr<Image> scaled (new Image (out_format, out_size, out_aligned));
232 struct SwsContext* scale_context = sws_getContext (
233 size().width, size().height, pixel_format(),
234 out_size.width, out_size.height, out_format,
235 fast ? SWS_FAST_BILINEAR : SWS_BICUBIC, 0, 0, 0
238 DCPOMATIC_ASSERT (yuv_to_rgb < dcp::YUV_TO_RGB_COUNT);
239 int const lut[dcp::YUV_TO_RGB_COUNT] = {
244 sws_setColorspaceDetails (
246 sws_getCoefficients (lut[yuv_to_rgb]), 0,
247 sws_getCoefficients (lut[yuv_to_rgb]), 0,
255 scaled->data(), scaled->stride()
258 sws_freeContext (scale_context);
263 /** Blacken a YUV image whose bits per pixel is rounded up to 16 */
265 Image::yuv_16_black (uint16_t v, bool alpha)
267 memset (data()[0], 0, sample_size(0).height * stride()[0]);
268 for (int i = 1; i < 3; ++i) {
269 int16_t* p = reinterpret_cast<int16_t*> (data()[i]);
270 int const lines = sample_size(i).height;
271 for (int y = 0; y < lines; ++y) {
272 /* We divide by 2 here because we are writing 2 bytes at a time */
273 for (int x = 0; x < line_size()[i] / 2; ++x) {
276 p += stride()[i] / 2;
281 memset (data()[3], 0, sample_size(3).height * stride()[3]);
286 Image::swap_16 (uint16_t v)
288 return ((v >> 8) & 0xff) | ((v & 0xff) << 8);
294 /* U/V black value for 8-bit colour */
295 static uint8_t const eight_bit_uv = (1 << 7) - 1;
296 /* U/V black value for 9-bit colour */
297 static uint16_t const nine_bit_uv = (1 << 8) - 1;
298 /* U/V black value for 10-bit colour */
299 static uint16_t const ten_bit_uv = (1 << 9) - 1;
300 /* U/V black value for 16-bit colour */
301 static uint16_t const sixteen_bit_uv = (1 << 15) - 1;
303 switch (_pixel_format) {
304 case AV_PIX_FMT_YUV420P:
305 case AV_PIX_FMT_YUV422P:
306 case AV_PIX_FMT_YUV444P:
307 case AV_PIX_FMT_YUV411P:
308 memset (data()[0], 0, sample_size(0).height * stride()[0]);
309 memset (data()[1], eight_bit_uv, sample_size(1).height * stride()[1]);
310 memset (data()[2], eight_bit_uv, sample_size(2).height * stride()[2]);
313 case AV_PIX_FMT_YUVJ420P:
314 case AV_PIX_FMT_YUVJ422P:
315 case AV_PIX_FMT_YUVJ444P:
316 memset (data()[0], 0, sample_size(0).height * stride()[0]);
317 memset (data()[1], eight_bit_uv + 1, sample_size(1).height * stride()[1]);
318 memset (data()[2], eight_bit_uv + 1, sample_size(2).height * stride()[2]);
321 case AV_PIX_FMT_YUV422P9LE:
322 case AV_PIX_FMT_YUV444P9LE:
323 yuv_16_black (nine_bit_uv, false);
326 case AV_PIX_FMT_YUV422P9BE:
327 case AV_PIX_FMT_YUV444P9BE:
328 yuv_16_black (swap_16 (nine_bit_uv), false);
331 case AV_PIX_FMT_YUV422P10LE:
332 case AV_PIX_FMT_YUV444P10LE:
333 yuv_16_black (ten_bit_uv, false);
336 case AV_PIX_FMT_YUV422P16LE:
337 case AV_PIX_FMT_YUV444P16LE:
338 yuv_16_black (sixteen_bit_uv, false);
341 case AV_PIX_FMT_YUV444P10BE:
342 case AV_PIX_FMT_YUV422P10BE:
343 yuv_16_black (swap_16 (ten_bit_uv), false);
346 case AV_PIX_FMT_YUVA420P9BE:
347 case AV_PIX_FMT_YUVA422P9BE:
348 case AV_PIX_FMT_YUVA444P9BE:
349 yuv_16_black (swap_16 (nine_bit_uv), true);
352 case AV_PIX_FMT_YUVA420P9LE:
353 case AV_PIX_FMT_YUVA422P9LE:
354 case AV_PIX_FMT_YUVA444P9LE:
355 yuv_16_black (nine_bit_uv, true);
358 case AV_PIX_FMT_YUVA420P10BE:
359 case AV_PIX_FMT_YUVA422P10BE:
360 case AV_PIX_FMT_YUVA444P10BE:
361 yuv_16_black (swap_16 (ten_bit_uv), true);
364 case AV_PIX_FMT_YUVA420P10LE:
365 case AV_PIX_FMT_YUVA422P10LE:
366 case AV_PIX_FMT_YUVA444P10LE:
367 yuv_16_black (ten_bit_uv, true);
370 case AV_PIX_FMT_YUVA420P16BE:
371 case AV_PIX_FMT_YUVA422P16BE:
372 case AV_PIX_FMT_YUVA444P16BE:
373 yuv_16_black (swap_16 (sixteen_bit_uv), true);
376 case AV_PIX_FMT_YUVA420P16LE:
377 case AV_PIX_FMT_YUVA422P16LE:
378 case AV_PIX_FMT_YUVA444P16LE:
379 yuv_16_black (sixteen_bit_uv, true);
382 case AV_PIX_FMT_RGB24:
383 case AV_PIX_FMT_ARGB:
384 case AV_PIX_FMT_RGBA:
385 case AV_PIX_FMT_ABGR:
386 case AV_PIX_FMT_BGRA:
387 case AV_PIX_FMT_RGB555LE:
388 case AV_PIX_FMT_RGB48LE:
389 case AV_PIX_FMT_RGB48BE:
390 case AV_PIX_FMT_XYZ12LE:
391 memset (data()[0], 0, sample_size(0).height * stride()[0]);
394 case AV_PIX_FMT_UYVY422:
396 int const Y = sample_size(0).height;
397 int const X = line_size()[0];
398 uint8_t* p = data()[0];
399 for (int y = 0; y < Y; ++y) {
400 for (int x = 0; x < X / 4; ++x) {
401 *p++ = eight_bit_uv; // Cb
403 *p++ = eight_bit_uv; // Cr
411 throw PixelFormatError ("make_black()", _pixel_format);
416 Image::make_transparent ()
418 if (_pixel_format != AV_PIX_FMT_RGBA) {
419 throw PixelFormatError ("make_transparent()", _pixel_format);
422 memset (data()[0], 0, sample_size(0).height * stride()[0]);
426 Image::alpha_blend (shared_ptr<const Image> other, Position<int> position)
428 /* We're blending RGBA images; first byte is blue, second byte is green, third byte blue, fourth byte alpha */
429 DCPOMATIC_ASSERT (other->pixel_format() == AV_PIX_FMT_RGBA);
430 int const other_bpp = 4;
432 int start_tx = position.x;
436 start_ox = -start_tx;
440 int start_ty = position.y;
444 start_oy = -start_ty;
448 switch (_pixel_format) {
449 case AV_PIX_FMT_RGB24:
451 /* Going onto RGB24. First byte is red, second green, third blue */
452 int const this_bpp = 3;
453 for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
454 uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp;
455 uint8_t* op = other->data()[0] + oy * other->stride()[0];
456 for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
457 float const alpha = float (op[3]) / 255;
458 tp[0] = op[2] * alpha + tp[0] * (1 - alpha);
459 tp[1] = op[1] * alpha + tp[1] * (1 - alpha);
460 tp[2] = op[0] * alpha + tp[2] * (1 - alpha);
468 case AV_PIX_FMT_BGRA:
469 case AV_PIX_FMT_RGBA:
471 int const this_bpp = 4;
472 for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
473 uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp;
474 uint8_t* op = other->data()[0] + oy * other->stride()[0];
475 for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
476 float const alpha = float (op[3]) / 255;
477 tp[0] = op[0] * alpha + tp[0] * (1 - alpha);
478 tp[1] = op[1] * alpha + tp[1] * (1 - alpha);
479 tp[2] = op[2] * alpha + tp[2] * (1 - alpha);
480 tp[3] = op[3] * alpha + tp[3] * (1 - alpha);
488 case AV_PIX_FMT_RGB48LE:
490 int const this_bpp = 6;
491 for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
492 uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp;
493 uint8_t* op = other->data()[0] + oy * other->stride()[0];
494 for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
495 float const alpha = float (op[3]) / 255;
496 /* Blend high bytes; the RGBA in op appears to be BGRA */
497 tp[1] = op[2] * alpha + tp[1] * (1 - alpha);
498 tp[3] = op[1] * alpha + tp[3] * (1 - alpha);
499 tp[5] = op[0] * alpha + tp[5] * (1 - alpha);
507 case AV_PIX_FMT_XYZ12LE:
509 boost::numeric::ublas::matrix<double> matrix = dcp::ColourConversion::srgb_to_xyz().rgb_to_xyz();
510 int const this_bpp = 6;
511 for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
512 uint8_t* tp = data()[0] + ty * stride()[0] + start_tx * this_bpp;
513 uint8_t* op = other->data()[0] + oy * other->stride()[0];
514 for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
515 float const alpha = float (op[3]) / 255;
517 /* Convert sRGB to XYZ; op is BGRA */
518 int const x = matrix(0, 0) * op[2] + matrix(0, 1) * op[1] + matrix(0, 2) * op[0];
519 int const y = matrix(1, 0) * op[2] + matrix(1, 1) * op[1] + matrix(1, 2) * op[0];
520 int const z = matrix(2, 0) * op[2] + matrix(2, 1) * op[1] + matrix(2, 2) * op[0];
522 /* Blend high bytes */
523 tp[1] = min (x, 255) * alpha + tp[1] * (1 - alpha);
524 tp[3] = min (y, 255) * alpha + tp[3] * (1 - alpha);
525 tp[5] = min (z, 255) * alpha + tp[5] * (1 - alpha);
534 DCPOMATIC_ASSERT (false);
539 Image::copy (shared_ptr<const Image> other, Position<int> position)
541 /* Only implemented for RGB24 onto RGB24 so far */
542 DCPOMATIC_ASSERT (_pixel_format == AV_PIX_FMT_RGB24 && other->pixel_format() == AV_PIX_FMT_RGB24);
543 DCPOMATIC_ASSERT (position.x >= 0 && position.y >= 0);
545 int const N = min (position.x + other->size().width, size().width) - position.x;
546 for (int ty = position.y, oy = 0; ty < size().height && oy < other->size().height; ++ty, ++oy) {
547 uint8_t * const tp = data()[0] + ty * stride()[0] + position.x * 3;
548 uint8_t * const op = other->data()[0] + oy * other->stride()[0];
549 memcpy (tp, op, N * 3);
554 Image::read_from_socket (shared_ptr<Socket> socket)
556 for (int i = 0; i < planes(); ++i) {
557 uint8_t* p = data()[i];
558 int const lines = sample_size(i).height;
559 for (int y = 0; y < lines; ++y) {
560 socket->read (p, line_size()[i]);
567 Image::write_to_socket (shared_ptr<Socket> socket) const
569 for (int i = 0; i < planes(); ++i) {
570 uint8_t* p = data()[i];
571 int const lines = sample_size(i).height;
572 for (int y = 0; y < lines; ++y) {
573 socket->write (p, line_size()[i]);
580 Image::bytes_per_pixel (int c) const
582 AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
584 throw PixelFormatError ("bytes_per_pixel()", _pixel_format);
591 float bpp[4] = { 0, 0, 0, 0 };
593 #ifdef DCPOMATIC_HAVE_AVCOMPONENTDESCRIPTOR_DEPTH_MINUS1
594 bpp[0] = floor ((d->comp[0].depth_minus1 + 8) / 8);
595 if (d->nb_components > 1) {
596 bpp[1] = floor ((d->comp[1].depth_minus1 + 8) / 8) / pow (2.0f, d->log2_chroma_w);
598 if (d->nb_components > 2) {
599 bpp[2] = floor ((d->comp[2].depth_minus1 + 8) / 8) / pow (2.0f, d->log2_chroma_w);
601 if (d->nb_components > 3) {
602 bpp[3] = floor ((d->comp[3].depth_minus1 + 8) / 8) / pow (2.0f, d->log2_chroma_w);
605 bpp[0] = floor ((d->comp[0].depth + 7) / 8);
606 if (d->nb_components > 1) {
607 bpp[1] = floor ((d->comp[1].depth + 7) / 8) / pow (2.0f, d->log2_chroma_w);
609 if (d->nb_components > 2) {
610 bpp[2] = floor ((d->comp[2].depth + 7) / 8) / pow (2.0f, d->log2_chroma_w);
612 if (d->nb_components > 3) {
613 bpp[3] = floor ((d->comp[3].depth + 7) / 8) / pow (2.0f, d->log2_chroma_w);
617 if ((d->flags & AV_PIX_FMT_FLAG_PLANAR) == 0) {
618 /* Not planar; sum them up */
619 return bpp[0] + bpp[1] + bpp[2] + bpp[3];
625 /** Construct a Image of a given size and format, allocating memory
628 * @param p Pixel format.
629 * @param s Size in pixels.
630 * @param extra_pixels Amount of extra "run-off" memory to allocate at the end of each plane in pixels.
632 Image::Image (AVPixelFormat p, dcp::Size s, bool aligned, int extra_pixels)
636 , _extra_pixels (extra_pixels)
644 _data = (uint8_t **) wrapped_av_malloc (4 * sizeof (uint8_t *));
645 _data[0] = _data[1] = _data[2] = _data[3] = 0;
647 _line_size = (int *) wrapped_av_malloc (4 * sizeof (int));
648 _line_size[0] = _line_size[1] = _line_size[2] = _line_size[3] = 0;
650 _stride = (int *) wrapped_av_malloc (4 * sizeof (int));
651 _stride[0] = _stride[1] = _stride[2] = _stride[3] = 0;
653 for (int i = 0; i < planes(); ++i) {
654 _line_size[i] = ceil (_size.width * bytes_per_pixel(i));
655 _stride[i] = stride_round_up (i, _line_size, _aligned ? 32 : 1);
657 /* The assembler function ff_rgb24ToY_avx (in libswscale/x86/input.asm)
658 uses a 16-byte fetch to read three bytes (R/G/B) of image data.
659 Hence on the last pixel of the last line it reads over the end of
660 the actual data by 1 byte. If the width of an image is a multiple
661 of the stride alignment there will be no padding at the end of image lines.
662 OS X crashes on this illegal read, though other operating systems don't
663 seem to mind. The nasty + 1 in this malloc makes sure there is always a byte
664 for that instruction to read safely.
666 Further to the above, valgrind is now telling me that ff_rgb24ToY_ssse3
667 over-reads by more then _avx. I can't follow the code to work out how much,
668 so I'll just over-allocate by 32 bytes and have done with it. Empirical
669 testing suggests that it works.
671 _data[i] = (uint8_t *) wrapped_av_malloc (_stride[i] * sample_size(i).height + _extra_pixels * bytes_per_pixel(i) + 32);
675 Image::Image (Image const & other)
676 : _size (other._size)
677 , _pixel_format (other._pixel_format)
678 , _aligned (other._aligned)
679 , _extra_pixels (other._extra_pixels)
683 for (int i = 0; i < planes(); ++i) {
684 uint8_t* p = _data[i];
685 uint8_t* q = other._data[i];
686 int const lines = sample_size(i).height;
687 for (int j = 0; j < lines; ++j) {
688 memcpy (p, q, _line_size[i]);
690 q += other.stride()[i];
695 Image::Image (AVFrame* frame)
696 : _size (frame->width, frame->height)
697 , _pixel_format (static_cast<AVPixelFormat> (frame->format))
703 for (int i = 0; i < planes(); ++i) {
704 uint8_t* p = _data[i];
705 uint8_t* q = frame->data[i];
706 int const lines = sample_size(i).height;
707 for (int j = 0; j < lines; ++j) {
708 memcpy (p, q, _line_size[i]);
710 /* AVFrame's linesize is what we call `stride' */
711 q += frame->linesize[i];
716 Image::Image (shared_ptr<const Image> other, bool aligned)
717 : _size (other->_size)
718 , _pixel_format (other->_pixel_format)
720 , _extra_pixels (other->_extra_pixels)
724 for (int i = 0; i < planes(); ++i) {
725 DCPOMATIC_ASSERT (line_size()[i] == other->line_size()[i]);
726 uint8_t* p = _data[i];
727 uint8_t* q = other->data()[i];
728 int const lines = sample_size(i).height;
729 for (int j = 0; j < lines; ++j) {
730 memcpy (p, q, line_size()[i]);
732 q += other->stride()[i];
738 Image::operator= (Image const & other)
740 if (this == &other) {
750 Image::swap (Image & other)
752 std::swap (_size, other._size);
753 std::swap (_pixel_format, other._pixel_format);
755 for (int i = 0; i < 4; ++i) {
756 std::swap (_data[i], other._data[i]);
757 std::swap (_line_size[i], other._line_size[i]);
758 std::swap (_stride[i], other._stride[i]);
761 std::swap (_aligned, other._aligned);
764 /** Destroy a Image */
767 for (int i = 0; i < planes(); ++i) {
772 av_free (_line_size);
783 Image::line_size () const
789 Image::stride () const
801 Image::aligned () const
807 merge (list<PositionImage> images)
809 if (images.empty ()) {
810 return PositionImage ();
813 if (images.size() == 1) {
814 return images.front ();
817 dcpomatic::Rect<int> all (images.front().position, images.front().image->size().width, images.front().image->size().height);
818 for (list<PositionImage>::const_iterator i = images.begin(); i != images.end(); ++i) {
819 all.extend (dcpomatic::Rect<int> (i->position, i->image->size().width, i->image->size().height));
822 shared_ptr<Image> merged (new Image (images.front().image->pixel_format (), dcp::Size (all.width, all.height), true));
823 merged->make_transparent ();
824 for (list<PositionImage>::const_iterator i = images.begin(); i != images.end(); ++i) {
825 merged->alpha_blend (i->image, i->position - all.position());
828 return PositionImage (merged, all.position ());
832 operator== (Image const & a, Image const & b)
834 if (a.planes() != b.planes() || a.pixel_format() != b.pixel_format() || a.aligned() != b.aligned()) {
838 for (int c = 0; c < a.planes(); ++c) {
839 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]) {
843 uint8_t* p = a.data()[c];
844 uint8_t* q = b.data()[c];
845 int const lines = a.sample_size(c).height;
846 for (int y = 0; y < lines; ++y) {
847 if (memcmp (p, q, a.line_size()[c]) != 0) {
860 * @param f Amount to fade by; 0 is black, 1 is no fade.
863 Image::fade (float f)
865 switch (_pixel_format) {
866 case AV_PIX_FMT_YUV420P:
867 case AV_PIX_FMT_YUV422P:
868 case AV_PIX_FMT_YUV444P:
869 case AV_PIX_FMT_YUV411P:
870 case AV_PIX_FMT_YUVJ420P:
871 case AV_PIX_FMT_YUVJ422P:
872 case AV_PIX_FMT_YUVJ444P:
873 case AV_PIX_FMT_RGB24:
874 case AV_PIX_FMT_ARGB:
875 case AV_PIX_FMT_RGBA:
876 case AV_PIX_FMT_ABGR:
877 case AV_PIX_FMT_BGRA:
878 case AV_PIX_FMT_RGB555LE:
880 for (int c = 0; c < 3; ++c) {
881 uint8_t* p = data()[c];
882 int const lines = sample_size(c).height;
883 for (int y = 0; y < lines; ++y) {
885 for (int x = 0; x < line_size()[c]; ++x) {
886 *q = int (float (*q) * f);
894 case AV_PIX_FMT_YUV422P9LE:
895 case AV_PIX_FMT_YUV444P9LE:
896 case AV_PIX_FMT_YUV422P10LE:
897 case AV_PIX_FMT_YUV444P10LE:
898 case AV_PIX_FMT_YUV422P16LE:
899 case AV_PIX_FMT_YUV444P16LE:
900 case AV_PIX_FMT_YUVA420P9LE:
901 case AV_PIX_FMT_YUVA422P9LE:
902 case AV_PIX_FMT_YUVA444P9LE:
903 case AV_PIX_FMT_YUVA420P10LE:
904 case AV_PIX_FMT_YUVA422P10LE:
905 case AV_PIX_FMT_YUVA444P10LE:
906 case AV_PIX_FMT_RGB48LE:
907 case AV_PIX_FMT_XYZ12LE:
908 /* 16-bit little-endian */
909 for (int c = 0; c < 3; ++c) {
910 int const stride_pixels = stride()[c] / 2;
911 int const line_size_pixels = line_size()[c] / 2;
912 uint16_t* p = reinterpret_cast<uint16_t*> (data()[c]);
913 int const lines = sample_size(c).height;
914 for (int y = 0; y < lines; ++y) {
916 for (int x = 0; x < line_size_pixels; ++x) {
917 *q = int (float (*q) * f);
925 case AV_PIX_FMT_YUV422P9BE:
926 case AV_PIX_FMT_YUV444P9BE:
927 case AV_PIX_FMT_YUV444P10BE:
928 case AV_PIX_FMT_YUV422P10BE:
929 case AV_PIX_FMT_YUVA420P9BE:
930 case AV_PIX_FMT_YUVA422P9BE:
931 case AV_PIX_FMT_YUVA444P9BE:
932 case AV_PIX_FMT_YUVA420P10BE:
933 case AV_PIX_FMT_YUVA422P10BE:
934 case AV_PIX_FMT_YUVA444P10BE:
935 case AV_PIX_FMT_YUVA420P16BE:
936 case AV_PIX_FMT_YUVA422P16BE:
937 case AV_PIX_FMT_YUVA444P16BE:
938 case AV_PIX_FMT_RGB48BE:
939 /* 16-bit big-endian */
940 for (int c = 0; c < 3; ++c) {
941 int const stride_pixels = stride()[c] / 2;
942 int const line_size_pixels = line_size()[c] / 2;
943 uint16_t* p = reinterpret_cast<uint16_t*> (data()[c]);
944 int const lines = sample_size(c).height;
945 for (int y = 0; y < lines; ++y) {
947 for (int x = 0; x < line_size_pixels; ++x) {
948 *q = swap_16 (int (float (swap_16 (*q)) * f));
956 case AV_PIX_FMT_UYVY422:
958 int const Y = sample_size(0).height;
959 int const X = line_size()[0];
960 uint8_t* p = data()[0];
961 for (int y = 0; y < Y; ++y) {
962 for (int x = 0; x < X; ++x) {
963 *p = int (float (*p) * f);
971 throw PixelFormatError ("fade()", _pixel_format);