/*
- Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include <libswscale/swscale.h>
#include <libavutil/pixfmt.h>
#include <libavutil/pixdesc.h>
-#include <libpostproc/postprocess.h>
}
#include "image.h"
#include "exceptions.h"
#include "scaler.h"
+#include "timer.h"
+#include "rect.h"
+#include "md5_digester.h"
#include "i18n.h"
using std::min;
using std::cout;
using std::cerr;
+using std::list;
+using std::stringstream;
using boost::shared_ptr;
-using libdcp::Size;
+using dcp::Size;
int
Image::line_factor (int n) const
/** Crop this image, scale it to `inter_size' and then place it in a black frame of `out_size' */
shared_ptr<Image>
-Image::crop_scale_window (Crop crop, libdcp::Size inter_size, libdcp::Size out_size, Scaler const * scaler, AVPixelFormat out_format, bool out_aligned) const
+Image::crop_scale_window (Crop crop, dcp::Size inter_size, dcp::Size out_size, Scaler const * scaler, AVPixelFormat out_format, bool out_aligned) const
{
assert (scaler);
/* Empirical testing suggests that sws_scale() will crash if
out->make_black ();
/* Size of the image after any crop */
- libdcp::Size const cropped_size = crop.apply (size ());
+ dcp::Size const cropped_size = crop.apply (size ());
/* Scale context for a scale from cropped_size to inter_size */
struct SwsContext* scale_context = sws_getContext (
- cropped_size.width, cropped_size.height, pixel_format(),
- inter_size.width, inter_size.height, out_format,
- scaler->ffmpeg_id (), 0, 0, 0
+ cropped_size.width, cropped_size.height, pixel_format(),
+ inter_size.width, inter_size.height, out_format,
+ scaler->ffmpeg_id (), 0, 0, 0
);
if (!scale_context) {
}
shared_ptr<Image>
-Image::scale (libdcp::Size out_size, Scaler const * scaler, AVPixelFormat out_format, bool out_aligned) const
+Image::scale (dcp::Size out_size, Scaler const * scaler, AVPixelFormat out_format, bool out_aligned) const
{
assert (scaler);
/* Empirical testing suggests that sws_scale() will crash if
shared_ptr<Image>
Image::crop (Crop crop, bool aligned) const
{
- libdcp::Size cropped_size = crop.apply (size ());
+ dcp::Size cropped_size = crop.apply (size ());
shared_ptr<Image> out (new Image (pixel_format(), cropped_size, aligned));
for (int c = 0; c < components(); ++c) {
}
}
+void
+Image::make_transparent ()
+{
+ if (_pixel_format != PIX_FMT_RGBA) {
+ throw PixelFormatError ("make_transparent()", _pixel_format);
+ }
+
+ memset (data()[0], 0, lines(0) * stride()[0]);
+}
+
void
Image::alpha_blend (shared_ptr<const Image> other, Position<int> position)
{
- /* Only implemented for RGBA onto RGB24 so far */
- assert (_pixel_format == PIX_FMT_RGB24 && other->pixel_format() == PIX_FMT_RGBA);
+ int this_bpp = 0;
+ int other_bpp = 0;
+
+ if (_pixel_format == PIX_FMT_BGRA && other->pixel_format() == PIX_FMT_RGBA) {
+ this_bpp = 4;
+ other_bpp = 4;
+ } else if (_pixel_format == PIX_FMT_RGB24 && other->pixel_format() == PIX_FMT_RGBA) {
+ this_bpp = 3;
+ other_bpp = 4;
+ } else {
+ assert (false);
+ }
int start_tx = position.x;
int start_ox = 0;
}
for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
- uint8_t* tp = data()[0] + ty * stride()[0] + position.x * 3;
+ uint8_t* tp = data()[0] + ty * stride()[0] + position.x * this_bpp;
uint8_t* op = other->data()[0] + oy * other->stride()[0];
for (int tx = start_tx, ox = start_ox; tx < size().width && ox < other->size().width; ++tx, ++ox) {
float const alpha = float (op[3]) / 255;
tp[0] = (tp[0] * (1 - alpha)) + op[0] * alpha;
tp[1] = (tp[1] * (1 - alpha)) + op[1] * alpha;
tp[2] = (tp[2] * (1 - alpha)) + op[2] * alpha;
- tp += 3;
- op += 4;
+ tp += this_bpp;
+ op += other_bpp;
}
}
}
* @param p Pixel format.
* @param s Size in pixels.
*/
-Image::Image (AVPixelFormat p, libdcp::Size s, bool aligned)
- : libdcp::Image (s)
+Image::Image (AVPixelFormat p, dcp::Size s, bool aligned)
+ : dcp::Image (s)
, _pixel_format (p)
, _aligned (aligned)
{
OS X crashes on this illegal read, though other operating systems don't
seem to mind. The nasty + 1 in this malloc makes sure there is always a byte
for that instruction to read safely.
+
+ Further to the above, valgrind is now telling me that ff_rgb24ToY_ssse3
+ over-reads by more then _avx. I can't follow the code to work out how much,
+ so I'll just over-allocate by 32 bytes and have done with it. Empirical
+ testing suggests that it works.
*/
- _data[i] = (uint8_t *) wrapped_av_malloc (_stride[i] * lines (i) + 1);
+ _data[i] = (uint8_t *) wrapped_av_malloc (_stride[i] * lines (i) + 32);
}
}
Image::Image (Image const & other)
- : libdcp::Image (other)
+ : dcp::Image (other)
, _pixel_format (other._pixel_format)
, _aligned (other._aligned)
{
}
Image::Image (AVFrame* frame)
- : libdcp::Image (libdcp::Size (frame->width, frame->height))
+ : dcp::Image (dcp::Size (frame->width, frame->height))
, _pixel_format (static_cast<AVPixelFormat> (frame->format))
, _aligned (true)
{
}
Image::Image (shared_ptr<const Image> other, bool aligned)
- : libdcp::Image (other)
+ : dcp::Image (other)
, _pixel_format (other->_pixel_format)
, _aligned (aligned)
{
void
Image::swap (Image & other)
{
- libdcp::Image::swap (other);
+ dcp::Image::swap (other);
std::swap (_pixel_format, other._pixel_format);
return _stride;
}
-libdcp::Size
+dcp::Size
Image::size () const
{
return _size;
return _aligned;
}
+PositionImage
+merge (list<PositionImage> images)
+{
+ if (images.empty ()) {
+ return PositionImage ();
+ }
+
+ dcpomatic::Rect<int> all (images.front().position, images.front().image->size().width, images.front().image->size().height);
+ for (list<PositionImage>::const_iterator i = images.begin(); i != images.end(); ++i) {
+ all.extend (dcpomatic::Rect<int> (i->position, i->image->size().width, i->image->size().height));
+ }
+
+ shared_ptr<Image> merged (new Image (images.front().image->pixel_format (), dcp::Size (all.width, all.height), true));
+ merged->make_transparent ();
+ for (list<PositionImage>::const_iterator i = images.begin(); i != images.end(); ++i) {
+ merged->alpha_blend (i->image, i->position);
+ }
+
+ return PositionImage (merged, all.position ());
+}
+
+string
+Image::digest () const
+{
+ MD5Digester digester;
+
+ for (int i = 0; i < components(); ++i) {
+ digester.add (data()[i], line_size()[i]);
+ }
+
+ return digester.get ();
+}
projects / dcpomatic.git / blobdiff