/*
- Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2016 Carl Hetherington <cth@carlh.net>
- This program is free software; you can redistribute it and/or modify
+ This file is part of DCP-o-matic.
+
+ DCP-o-matic is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
- This program is distributed in the hope that it will be useful,
+ DCP-o-matic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
* @brief A class to describe a video image.
*/
-#include <iostream>
+#include "image.h"
+#include "exceptions.h"
+#include "timer.h"
+#include "rect.h"
+#include "util.h"
+#include "compose.hpp"
+#include "dcpomatic_socket.h"
+#include <dcp/rgb_xyz.h>
+#include <dcp/transfer_function.h>
extern "C" {
#include <libswscale/swscale.h>
#include <libavutil/pixfmt.h>
#include <libavutil/pixdesc.h>
+#include <libavutil/frame.h>
}
-#include "image.h"
-#include "exceptions.h"
-#include "scaler.h"
-#include "timer.h"
-#include "rect.h"
-#include "md5_digester.h"
+#include <png.h>
+#if HAVE_VALGRIND_MEMCHECK_H
+#include <valgrind/memcheck.h>
+#endif
+#include <iostream>
#include "i18n.h"
using std::string;
using std::min;
+using std::max;
using std::cout;
using std::cerr;
using std::list;
+using std::runtime_error;
using boost::shared_ptr;
using dcp::Size;
int
-Image::line_factor (int n) const
+Image::vertical_factor (int n) const
{
if (n == 0) {
return 1;
AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
if (!d) {
- throw PixelFormatError ("lines()", _pixel_format);
+ throw PixelFormatError ("line_factor()", _pixel_format);
}
-
+
return pow (2.0f, d->log2_chroma_h);
}
+int
+Image::horizontal_factor (int n) const
+{
+ if (n == 0) {
+ return 1;
+ }
+
+ AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
+ if (!d) {
+ throw PixelFormatError ("sample_size()", _pixel_format);
+ }
+
+ return pow (2.0f, d->log2_chroma_w);
+}
+
/** @param n Component index.
- * @return Number of lines in the image for the given component.
+ * @return Number of samples (i.e. pixels, unless sub-sampled) in each direction for this component.
*/
-int
-Image::lines (int n) const
+dcp::Size
+Image::sample_size (int n) const
{
- return rint (ceil (static_cast<double>(size().height) / line_factor (n)));
+ return dcp::Size (
+ lrint (ceil (static_cast<double>(size().width) / horizontal_factor (n))),
+ lrint (ceil (static_cast<double>(size().height) / vertical_factor (n)))
+ );
}
-/** @return Number of components */
+/** @return Number of planes */
int
-Image::components () const
+Image::planes () const
{
AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
if (!d) {
- throw PixelFormatError ("components()", _pixel_format);
+ throw PixelFormatError ("planes()", _pixel_format);
+ }
+
+ if (_pixel_format == AV_PIX_FMT_PAL8) {
+ return 2;
}
- if ((d->flags & PIX_FMT_PLANAR) == 0) {
+ if ((d->flags & AV_PIX_FMT_FLAG_PLANAR) == 0) {
return 1;
}
-
+
return d->nb_components;
}
-/** Crop this image, scale it to `inter_size' and then place it in a black frame of `out_size' */
+/** Crop this image, scale it to `inter_size' and then place it in a black frame of `out_size'.
+ * @param crop Amount to crop by.
+ * @param inter_size Size to scale the cropped image to.
+ * @param out_size Size of output frame; if this is larger than inter_size there will be black padding.
+ * @param yuv_to_rgb YUV to RGB transformation to use, if required.
+ * @param out_format Output pixel format.
+ * @param out_aligned true to make the output image aligned.
+ * @param fast Try to be fast at the possible expense of quality; at present this means using
+ * fast bilinear rather than bicubic scaling.
+ */
shared_ptr<Image>
-Image::crop_scale_window (Crop crop, dcp::Size inter_size, dcp::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, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, bool out_aligned, bool fast
+ ) const
{
- assert (scaler);
/* Empirical testing suggests that sws_scale() will crash if
the input image is not aligned.
*/
- assert (aligned ());
+ DCPOMATIC_ASSERT (aligned ());
- assert (out_size.width >= inter_size.width);
- assert (out_size.height >= inter_size.height);
+ DCPOMATIC_ASSERT (out_size.width >= inter_size.width);
+ DCPOMATIC_ASSERT (out_size.height >= inter_size.height);
- /* Here's an image of out_size */
- shared_ptr<Image> out (new Image (out_format, out_size, out_aligned));
+ shared_ptr<Image> out (new Image(out_format, out_size, out_aligned));
out->make_black ();
/* Size of the image after any crop */
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
+ fast ? SWS_FAST_BILINEAR : SWS_BICUBIC, 0, 0, 0
);
if (!scale_context) {
- throw StringError (N_("Could not allocate SwsContext"));
+ throw runtime_error (N_("Could not allocate SwsContext"));
+ }
+
+ DCPOMATIC_ASSERT (yuv_to_rgb < dcp::YUV_TO_RGB_COUNT);
+ int const lut[dcp::YUV_TO_RGB_COUNT] = {
+ SWS_CS_ITU601,
+ SWS_CS_ITU709
+ };
+
+ /* The 3rd parameter here is:
+ 0 -> source range MPEG (i.e. "video", 16-235)
+ 1 -> source range JPEG (i.e. "full", 0-255)
+ And the 5th:
+ 0 -> destination range MPEG (i.e. "video", 16-235)
+ 1 -> destination range JPEG (i.e. "full", 0-255)
+
+ But remember: sws_setColorspaceDetails ignores
+ these parameters unless the image isYUV or isGray
+ (if it's neither, it uses video range for source
+ and destination).
+ */
+ sws_setColorspaceDetails (
+ scale_context,
+ sws_getCoefficients (lut[yuv_to_rgb]), 0,
+ sws_getCoefficients (lut[yuv_to_rgb]), 0,
+ 0, 1 << 16, 1 << 16
+ );
+
+ AVPixFmtDescriptor const * in_desc = av_pix_fmt_desc_get (_pixel_format);
+ if (!in_desc) {
+ throw PixelFormatError ("crop_scale_window()", _pixel_format);
}
/* Prepare input data pointers with crop */
- uint8_t* scale_in_data[components()];
- for (int c = 0; c < components(); ++c) {
- scale_in_data[c] = data()[c] + int (rint (bytes_per_pixel(c) * crop.left)) + stride()[c] * (crop.top / line_factor(c));
+ uint8_t* scale_in_data[planes()];
+ for (int c = 0; c < planes(); ++c) {
+ /* To work out the crop in bytes, start by multiplying
+ the crop by the (average) bytes per pixel. Then
+ round down so that we don't crop a subsampled pixel until
+ we've cropped all of its Y-channel pixels.
+ */
+ int const x = lrintf (bytes_per_pixel(c) * crop.left) & ~ ((int) in_desc->log2_chroma_w);
+ scale_in_data[c] = data()[c] + x + stride()[c] * (crop.top / vertical_factor(c));
}
/* Corner of the image within out_size */
Position<int> const corner ((out_size.width - inter_size.width) / 2, (out_size.height - inter_size.height) / 2);
- uint8_t* scale_out_data[out->components()];
- for (int c = 0; c < out->components(); ++c) {
- scale_out_data[c] = out->data()[c] + int (rint (out->bytes_per_pixel(c) * corner.x)) + out->stride()[c] * corner.y;
+ AVPixFmtDescriptor const * out_desc = av_pix_fmt_desc_get (out_format);
+ if (!out_desc) {
+ throw PixelFormatError ("crop_scale_window()", out_format);
+ }
+
+ uint8_t* scale_out_data[out->planes()];
+ for (int c = 0; c < out->planes(); ++c) {
+ /* See the note in the crop loop above */
+ int const x = lrintf (out->bytes_per_pixel(c) * corner.x) & ~ ((int) out_desc->log2_chroma_w);
+ scale_out_data[c] = out->data()[c] + x + out->stride()[c] * (corner.y / out->vertical_factor(c));
}
sws_scale (
sws_freeContext (scale_context);
- return out;
+ if (crop != Crop() && cropped_size == inter_size && _pixel_format == out_format) {
+ /* We are cropping without any scaling or pixel format conversion, so FFmpeg may have left some
+ data behind in our image. Clear it out. It may get to the point where we should just stop
+ trying to be clever with cropping.
+ */
+ out->make_part_black (corner.x + cropped_size.width, out_size.width - cropped_size.width);
+ }
+
+ return out;
}
shared_ptr<Image>
-Image::scale (dcp::Size out_size, Scaler const * scaler, AVPixelFormat out_format, bool out_aligned) const
+Image::convert_pixel_format (dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, bool out_aligned, bool fast) const
+{
+ return scale(size(), yuv_to_rgb, out_format, out_aligned, fast);
+}
+
+/** @param out_size Size to scale to.
+ * @param yuv_to_rgb YUVToRGB transform transform to use, if required.
+ * @param out_format Output pixel format.
+ * @param out_aligned true to make an aligned output image.
+ * @param fast Try to be fast at the possible expense of quality; at present this means using
+ * fast bilinear rather than bicubic scaling.
+ */
+shared_ptr<Image>
+Image::scale (dcp::Size out_size, dcp::YUVToRGB yuv_to_rgb, AVPixelFormat out_format, bool out_aligned, bool fast) const
{
- assert (scaler);
/* Empirical testing suggests that sws_scale() will crash if
the input image is not aligned.
*/
- assert (aligned ());
+ DCPOMATIC_ASSERT (aligned ());
shared_ptr<Image> scaled (new Image (out_format, out_size, out_aligned));
struct SwsContext* scale_context = sws_getContext (
size().width, size().height, pixel_format(),
out_size.width, out_size.height, out_format,
- scaler->ffmpeg_id (), 0, 0, 0
+ (fast ? SWS_FAST_BILINEAR : SWS_BICUBIC) | SWS_ACCURATE_RND, 0, 0, 0
+ );
+
+ DCPOMATIC_ASSERT (yuv_to_rgb < dcp::YUV_TO_RGB_COUNT);
+ int const lut[dcp::YUV_TO_RGB_COUNT] = {
+ SWS_CS_ITU601,
+ SWS_CS_ITU709
+ };
+
+ /* The 3rd parameter here is:
+ 0 -> source range MPEG (i.e. "video", 16-235)
+ 1 -> source range JPEG (i.e. "full", 0-255)
+ And the 5th:
+ 0 -> destination range MPEG (i.e. "video", 16-235)
+ 1 -> destination range JPEG (i.e. "full", 0-255)
+
+ But remember: sws_setColorspaceDetails ignores
+ these parameters unless the image isYUV or isGray
+ (if it's neither, it uses video range for source
+ and destination).
+ */
+ sws_setColorspaceDetails (
+ scale_context,
+ sws_getCoefficients (lut[yuv_to_rgb]), 0,
+ sws_getCoefficients (lut[yuv_to_rgb]), 0,
+ 0, 1 << 16, 1 << 16
);
sws_scale (
return scaled;
}
-shared_ptr<Image>
-Image::crop (Crop crop, bool aligned) const
-{
- 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) {
- int const crop_left_in_bytes = bytes_per_pixel(c) * crop.left;
- /* bytes_per_pixel() could be a fraction; in this case the stride will be rounded
- up, and we need to make sure that we copy over the width (up to the stride)
- rather than short of the width; hence the ceil() here.
- */
- int const cropped_width_in_bytes = ceil (bytes_per_pixel(c) * cropped_size.width);
-
- /* Start of the source line, cropped from the top but not the left */
- uint8_t* in_p = data()[c] + (crop.top / out->line_factor(c)) * stride()[c];
- uint8_t* out_p = out->data()[c];
-
- for (int y = 0; y < out->lines(c); ++y) {
- memcpy (out_p, in_p + crop_left_in_bytes, cropped_width_in_bytes);
- in_p += stride()[c];
- out_p += out->stride()[c];
- }
- }
-
- return out;
-}
-
/** Blacken a YUV image whose bits per pixel is rounded up to 16 */
void
Image::yuv_16_black (uint16_t v, bool alpha)
{
- memset (data()[0], 0, lines(0) * stride()[0]);
+ memset (data()[0], 0, sample_size(0).height * stride()[0]);
for (int i = 1; i < 3; ++i) {
int16_t* p = reinterpret_cast<int16_t*> (data()[i]);
- for (int y = 0; y < lines(i); ++y) {
+ int const lines = sample_size(i).height;
+ for (int y = 0; y < lines; ++y) {
/* We divide by 2 here because we are writing 2 bytes at a time */
for (int x = 0; x < line_size()[i] / 2; ++x) {
p[x] = v;
}
if (alpha) {
- memset (data()[3], 0, lines(3) * stride()[3]);
+ memset (data()[3], 0, sample_size(3).height * stride()[3]);
}
}
return ((v >> 8) & 0xff) | ((v & 0xff) << 8);
}
+void
+Image::make_part_black (int x, int w)
+{
+ switch (_pixel_format) {
+ case AV_PIX_FMT_RGB24:
+ case AV_PIX_FMT_ARGB:
+ case AV_PIX_FMT_RGBA:
+ case AV_PIX_FMT_ABGR:
+ case AV_PIX_FMT_BGRA:
+ case AV_PIX_FMT_RGB555LE:
+ case AV_PIX_FMT_RGB48LE:
+ case AV_PIX_FMT_RGB48BE:
+ case AV_PIX_FMT_XYZ12LE:
+ {
+ int const h = sample_size(0).height;
+ int const bpp = bytes_per_pixel(0);
+ int const s = stride()[0];
+ uint8_t* p = data()[0];
+ for (int y = 0; y < h; y++) {
+ memset (p + x * bpp, 0, w * bpp);
+ p += s;
+ }
+ break;
+ }
+
+ default:
+ throw PixelFormatError ("make_part_black()", _pixel_format);
+ }
+}
+
void
Image::make_black ()
{
static uint16_t const ten_bit_uv = (1 << 9) - 1;
/* U/V black value for 16-bit colour */
static uint16_t const sixteen_bit_uv = (1 << 15) - 1;
-
+
switch (_pixel_format) {
- case PIX_FMT_YUV420P:
- case PIX_FMT_YUV422P:
- case PIX_FMT_YUV444P:
- case PIX_FMT_YUV411P:
- memset (data()[0], 0, lines(0) * stride()[0]);
- memset (data()[1], eight_bit_uv, lines(1) * stride()[1]);
- memset (data()[2], eight_bit_uv, lines(2) * stride()[2]);
+ case AV_PIX_FMT_YUV420P:
+ case AV_PIX_FMT_YUV422P:
+ case AV_PIX_FMT_YUV444P:
+ case AV_PIX_FMT_YUV411P:
+ memset (data()[0], 0, sample_size(0).height * stride()[0]);
+ memset (data()[1], eight_bit_uv, sample_size(1).height * stride()[1]);
+ memset (data()[2], eight_bit_uv, sample_size(2).height * stride()[2]);
break;
- case PIX_FMT_YUVJ420P:
- case PIX_FMT_YUVJ422P:
- case PIX_FMT_YUVJ444P:
- memset (data()[0], 0, lines(0) * stride()[0]);
- memset (data()[1], eight_bit_uv + 1, lines(1) * stride()[1]);
- memset (data()[2], eight_bit_uv + 1, lines(2) * stride()[2]);
+ case AV_PIX_FMT_YUVJ420P:
+ case AV_PIX_FMT_YUVJ422P:
+ case AV_PIX_FMT_YUVJ444P:
+ memset (data()[0], 0, sample_size(0).height * stride()[0]);
+ memset (data()[1], eight_bit_uv + 1, sample_size(1).height * stride()[1]);
+ memset (data()[2], eight_bit_uv + 1, sample_size(2).height * stride()[2]);
break;
- case PIX_FMT_YUV422P9LE:
- case PIX_FMT_YUV444P9LE:
+ case AV_PIX_FMT_YUV422P9LE:
+ case AV_PIX_FMT_YUV444P9LE:
yuv_16_black (nine_bit_uv, false);
break;
- case PIX_FMT_YUV422P9BE:
- case PIX_FMT_YUV444P9BE:
+ case AV_PIX_FMT_YUV422P9BE:
+ case AV_PIX_FMT_YUV444P9BE:
yuv_16_black (swap_16 (nine_bit_uv), false);
break;
-
- case PIX_FMT_YUV422P10LE:
- case PIX_FMT_YUV444P10LE:
+
+ case AV_PIX_FMT_YUV422P10LE:
+ case AV_PIX_FMT_YUV444P10LE:
yuv_16_black (ten_bit_uv, false);
break;
- case PIX_FMT_YUV422P16LE:
- case PIX_FMT_YUV444P16LE:
+ case AV_PIX_FMT_YUV422P16LE:
+ case AV_PIX_FMT_YUV444P16LE:
yuv_16_black (sixteen_bit_uv, false);
break;
-
- case PIX_FMT_YUV444P10BE:
- case PIX_FMT_YUV422P10BE:
+
+ case AV_PIX_FMT_YUV444P10BE:
+ case AV_PIX_FMT_YUV422P10BE:
yuv_16_black (swap_16 (ten_bit_uv), false);
break;
case AV_PIX_FMT_YUVA444P9BE:
yuv_16_black (swap_16 (nine_bit_uv), true);
break;
-
+
case AV_PIX_FMT_YUVA420P9LE:
case AV_PIX_FMT_YUVA422P9LE:
case AV_PIX_FMT_YUVA444P9LE:
yuv_16_black (nine_bit_uv, true);
break;
-
+
case AV_PIX_FMT_YUVA420P10BE:
case AV_PIX_FMT_YUVA422P10BE:
case AV_PIX_FMT_YUVA444P10BE:
yuv_16_black (swap_16 (ten_bit_uv), true);
break;
-
+
case AV_PIX_FMT_YUVA420P10LE:
case AV_PIX_FMT_YUVA422P10LE:
case AV_PIX_FMT_YUVA444P10LE:
yuv_16_black (ten_bit_uv, true);
break;
-
+
case AV_PIX_FMT_YUVA420P16BE:
case AV_PIX_FMT_YUVA422P16BE:
case AV_PIX_FMT_YUVA444P16BE:
yuv_16_black (swap_16 (sixteen_bit_uv), true);
break;
-
+
case AV_PIX_FMT_YUVA420P16LE:
case AV_PIX_FMT_YUVA422P16LE:
case AV_PIX_FMT_YUVA444P16LE:
yuv_16_black (sixteen_bit_uv, true);
break;
- case PIX_FMT_RGB24:
- case PIX_FMT_ARGB:
- case PIX_FMT_RGBA:
- case PIX_FMT_ABGR:
- case PIX_FMT_BGRA:
- case PIX_FMT_RGB555LE:
- memset (data()[0], 0, lines(0) * stride()[0]);
+ case AV_PIX_FMT_RGB24:
+ case AV_PIX_FMT_ARGB:
+ case AV_PIX_FMT_RGBA:
+ case AV_PIX_FMT_ABGR:
+ case AV_PIX_FMT_BGRA:
+ case AV_PIX_FMT_RGB555LE:
+ case AV_PIX_FMT_RGB48LE:
+ case AV_PIX_FMT_RGB48BE:
+ case AV_PIX_FMT_XYZ12LE:
+ memset (data()[0], 0, sample_size(0).height * stride()[0]);
break;
- case PIX_FMT_UYVY422:
+ case AV_PIX_FMT_UYVY422:
{
- int const Y = lines(0);
+ int const Y = sample_size(0).height;
int const X = line_size()[0];
uint8_t* p = data()[0];
for (int y = 0; y < Y; ++y) {
void
Image::make_transparent ()
{
- if (_pixel_format != PIX_FMT_RGBA) {
+ if (_pixel_format != AV_PIX_FMT_BGRA && _pixel_format != AV_PIX_FMT_RGBA) {
throw PixelFormatError ("make_transparent()", _pixel_format);
}
- memset (data()[0], 0, lines(0) * stride()[0]);
+ memset (data()[0], 0, sample_size(0).height * stride()[0]);
}
void
Image::alpha_blend (shared_ptr<const Image> other, Position<int> position)
{
- assert (other->pixel_format() == PIX_FMT_RGBA);
- int const other_bpp = 4;
+ /* We're blending RGBA or BGRA images */
+ DCPOMATIC_ASSERT (other->pixel_format() == AV_PIX_FMT_BGRA || other->pixel_format() == AV_PIX_FMT_RGBA);
+ int const blue = other->pixel_format() == AV_PIX_FMT_BGRA ? 0 : 2;
+ int const red = other->pixel_format() == AV_PIX_FMT_BGRA ? 2 : 0;
- int this_bpp = 0;
- switch (_pixel_format) {
- case PIX_FMT_BGRA:
- case PIX_FMT_RGBA:
- this_bpp = 4;
- break;
- case PIX_FMT_RGB24:
- this_bpp = 3;
- break;
- default:
- assert (false);
- }
+ int const other_bpp = 4;
int start_tx = position.x;
int start_ox = 0;
start_ty = 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] + start_tx * 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] = op[0] + (tp[0] * (1 - alpha));
- tp[1] = op[1] + (tp[1] * (1 - alpha));
- tp[2] = op[2] + (tp[2] * (1 - alpha));
- tp[3] = op[3] + (tp[3] * (1 - alpha));
-
- tp += this_bpp;
- op += other_bpp;
+ switch (_pixel_format) {
+ case AV_PIX_FMT_RGB24:
+ {
+ /* Going onto RGB24. First byte is red, second green, third blue */
+ int const this_bpp = 3;
+ 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] + start_tx * 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] = op[red] * alpha + tp[0] * (1 - alpha);
+ tp[1] = op[1] * alpha + tp[1] * (1 - alpha);
+ tp[2] = op[blue] * alpha + tp[2] * (1 - alpha);
+
+ tp += this_bpp;
+ op += other_bpp;
+ }
+ }
+ break;
+ }
+ case AV_PIX_FMT_BGRA:
+ {
+ int const this_bpp = 4;
+ 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] + start_tx * 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] = op[blue] * alpha + tp[0] * (1 - alpha);
+ tp[1] = op[1] * alpha + tp[1] * (1 - alpha);
+ tp[2] = op[red] * alpha + tp[2] * (1 - alpha);
+ tp[3] = op[3] * alpha + tp[3] * (1 - alpha);
+
+ tp += this_bpp;
+ op += other_bpp;
+ }
+ }
+ break;
+ }
+ case AV_PIX_FMT_RGBA:
+ {
+ int const this_bpp = 4;
+ 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] + start_tx * 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] = op[red] * alpha + tp[0] * (1 - alpha);
+ tp[1] = op[1] * alpha + tp[1] * (1 - alpha);
+ tp[2] = op[blue] * alpha + tp[2] * (1 - alpha);
+ tp[3] = op[3] * alpha + tp[3] * (1 - alpha);
+
+ tp += this_bpp;
+ op += other_bpp;
+ }
+ }
+ break;
+ }
+ case AV_PIX_FMT_RGB48LE:
+ {
+ int const this_bpp = 6;
+ 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] + start_tx * 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;
+ /* Blend high bytes */
+ tp[1] = op[red] * alpha + tp[1] * (1 - alpha);
+ tp[3] = op[1] * alpha + tp[3] * (1 - alpha);
+ tp[5] = op[blue] * alpha + tp[5] * (1 - alpha);
+
+ tp += this_bpp;
+ op += other_bpp;
+ }
+ }
+ break;
+ }
+ case AV_PIX_FMT_XYZ12LE:
+ {
+ dcp::ColourConversion conv = dcp::ColourConversion::srgb_to_xyz();
+ double fast_matrix[9];
+ dcp::combined_rgb_to_xyz (conv, fast_matrix);
+ double const * lut_in = conv.in()->lut (8, false);
+ double const * lut_out = conv.out()->lut (16, true);
+ int const this_bpp = 6;
+ for (int ty = start_ty, oy = start_oy; ty < size().height && oy < other->size().height; ++ty, ++oy) {
+ uint16_t* tp = reinterpret_cast<uint16_t*> (data()[0] + ty * stride()[0] + start_tx * 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;
+
+ /* Convert sRGB to XYZ; op is BGRA. First, input gamma LUT */
+ double const r = lut_in[op[red]];
+ double const g = lut_in[op[1]];
+ double const b = lut_in[op[blue]];
+
+ /* RGB to XYZ, including Bradford transform and DCI companding */
+ double const x = max (0.0, min (65535.0, r * fast_matrix[0] + g * fast_matrix[1] + b * fast_matrix[2]));
+ double const y = max (0.0, min (65535.0, r * fast_matrix[3] + g * fast_matrix[4] + b * fast_matrix[5]));
+ double const z = max (0.0, min (65535.0, r * fast_matrix[6] + g * fast_matrix[7] + b * fast_matrix[8]));
+
+ /* Out gamma LUT and blend */
+ tp[0] = lrint(lut_out[lrint(x)] * 65535) * alpha + tp[0] * (1 - alpha);
+ tp[1] = lrint(lut_out[lrint(y)] * 65535) * alpha + tp[1] * (1 - alpha);
+ tp[2] = lrint(lut_out[lrint(z)] * 65535) * alpha + tp[2] * (1 - alpha);
+
+ tp += this_bpp / 2;
+ op += other_bpp;
+ }
+ }
+ break;
+ }
+ case AV_PIX_FMT_YUV420P:
+ {
+ shared_ptr<Image> yuv = other->convert_pixel_format (dcp::YUV_TO_RGB_REC709, _pixel_format, false, false);
+ dcp::Size const ts = size();
+ dcp::Size const os = yuv->size();
+ for (int ty = start_ty, oy = start_oy; ty < ts.height && oy < os.height; ++ty, ++oy) {
+ int const hty = ty / 2;
+ int const hoy = oy / 2;
+ uint8_t* tY = data()[0] + (ty * stride()[0]) + start_tx;
+ uint8_t* tU = data()[1] + (hty * stride()[1]) + start_tx / 2;
+ uint8_t* tV = data()[2] + (hty * stride()[2]) + start_tx / 2;
+ uint8_t* oY = yuv->data()[0] + (oy * yuv->stride()[0]) + start_ox;
+ uint8_t* oU = yuv->data()[1] + (hoy * yuv->stride()[1]) + start_ox / 2;
+ uint8_t* oV = yuv->data()[2] + (hoy * yuv->stride()[2]) + start_ox / 2;
+ uint8_t* alpha = other->data()[0] + (oy * other->stride()[0]) + start_ox * 4;
+ for (int tx = start_tx, ox = start_ox; tx < ts.width && ox < os.width; ++tx, ++ox) {
+ float const a = float(alpha[3]) / 255;
+ *tY = *oY * a + *tY * (1 - a);
+ *tU = *oU * a + *tU * (1 - a);
+ *tV = *oV * a + *tV * (1 - a);
+ ++tY;
+ ++oY;
+ if (tx % 2) {
+ ++tU;
+ ++tV;
+ }
+ if (ox % 2) {
+ ++oU;
+ ++oV;
+ }
+ alpha += 4;
+ }
+ }
+ break;
+ }
+ case AV_PIX_FMT_YUV420P10:
+ {
+ shared_ptr<Image> yuv = other->convert_pixel_format (dcp::YUV_TO_RGB_REC709, _pixel_format, false, false);
+ dcp::Size const ts = size();
+ dcp::Size const os = yuv->size();
+ for (int ty = start_ty, oy = start_oy; ty < ts.height && oy < os.height; ++ty, ++oy) {
+ int const hty = ty / 2;
+ int const hoy = oy / 2;
+ uint16_t* tY = ((uint16_t *) (data()[0] + (ty * stride()[0]))) + start_tx;
+ uint16_t* tU = ((uint16_t *) (data()[1] + (hty * stride()[1]))) + start_tx / 2;
+ uint16_t* tV = ((uint16_t *) (data()[2] + (hty * stride()[2]))) + start_tx / 2;
+ uint16_t* oY = ((uint16_t *) (yuv->data()[0] + (oy * yuv->stride()[0]))) + start_ox;
+ uint16_t* oU = ((uint16_t *) (yuv->data()[1] + (hoy * yuv->stride()[1]))) + start_ox / 2;
+ uint16_t* oV = ((uint16_t *) (yuv->data()[2] + (hoy * yuv->stride()[2]))) + start_ox / 2;
+ uint8_t* alpha = other->data()[0] + (oy * other->stride()[0]) + start_ox * 4;
+ for (int tx = start_tx, ox = start_ox; tx < ts.width && ox < os.width; ++tx, ++ox) {
+ float const a = float(alpha[3]) / 255;
+ *tY = *oY * a + *tY * (1 - a);
+ *tU = *oU * a + *tU * (1 - a);
+ *tV = *oV * a + *tV * (1 - a);
+ ++tY;
+ ++oY;
+ if (tx % 2) {
+ ++tU;
+ ++tV;
+ }
+ if (ox % 2) {
+ ++oU;
+ ++oV;
+ }
+ alpha += 4;
+ }
+ }
+ break;
+ }
+ case AV_PIX_FMT_YUV422P10LE:
+ {
+ shared_ptr<Image> yuv = other->convert_pixel_format (dcp::YUV_TO_RGB_REC709, _pixel_format, false, false);
+ dcp::Size const ts = size();
+ dcp::Size const os = yuv->size();
+ for (int ty = start_ty, oy = start_oy; ty < ts.height && oy < os.height; ++ty, ++oy) {
+ uint16_t* tY = ((uint16_t *) (data()[0] + (ty * stride()[0]))) + start_tx;
+ uint16_t* tU = ((uint16_t *) (data()[1] + (ty * stride()[1]))) + start_tx / 2;
+ uint16_t* tV = ((uint16_t *) (data()[2] + (ty * stride()[2]))) + start_tx / 2;
+ uint16_t* oY = ((uint16_t *) (yuv->data()[0] + (oy * yuv->stride()[0]))) + start_ox;
+ uint16_t* oU = ((uint16_t *) (yuv->data()[1] + (oy * yuv->stride()[1]))) + start_ox / 2;
+ uint16_t* oV = ((uint16_t *) (yuv->data()[2] + (oy * yuv->stride()[2]))) + start_ox / 2;
+ uint8_t* alpha = other->data()[0] + (oy * other->stride()[0]) + start_ox * 4;
+ for (int tx = start_tx, ox = start_ox; tx < ts.width && ox < os.width; ++tx, ++ox) {
+ float const a = float(alpha[3]) / 255;
+ *tY = *oY * a + *tY * (1 - a);
+ *tU = *oU * a + *tU * (1 - a);
+ *tV = *oV * a + *tV * (1 - a);
+ ++tY;
+ ++oY;
+ if (tx % 2) {
+ ++tU;
+ ++tV;
+ }
+ if (ox % 2) {
+ ++oU;
+ ++oV;
+ }
+ alpha += 4;
+ }
}
+ break;
+ }
+ default:
+ throw PixelFormatError ("alpha_blend()", _pixel_format);
}
}
Image::copy (shared_ptr<const Image> other, Position<int> position)
{
/* Only implemented for RGB24 onto RGB24 so far */
- assert (_pixel_format == PIX_FMT_RGB24 && other->pixel_format() == PIX_FMT_RGB24);
- assert (position.x >= 0 && position.y >= 0);
+ DCPOMATIC_ASSERT (_pixel_format == AV_PIX_FMT_RGB24 && other->pixel_format() == AV_PIX_FMT_RGB24);
+ DCPOMATIC_ASSERT (position.x >= 0 && position.y >= 0);
int const N = min (position.x + other->size().width, size().width) - position.x;
for (int ty = position.y, oy = 0; ty < size().height && oy < other->size().height; ++ty, ++oy) {
uint8_t * const op = other->data()[0] + oy * other->stride()[0];
memcpy (tp, op, N * 3);
}
-}
+}
void
Image::read_from_socket (shared_ptr<Socket> socket)
{
- for (int i = 0; i < components(); ++i) {
+ for (int i = 0; i < planes(); ++i) {
uint8_t* p = data()[i];
- for (int y = 0; y < lines(i); ++y) {
+ int const lines = sample_size(i).height;
+ for (int y = 0; y < lines; ++y) {
socket->read (p, line_size()[i]);
p += stride()[i];
}
void
Image::write_to_socket (shared_ptr<Socket> socket) const
{
- for (int i = 0; i < components(); ++i) {
+ for (int i = 0; i < planes(); ++i) {
uint8_t* p = data()[i];
- for (int y = 0; y < lines(i); ++y) {
+ int const lines = sample_size(i).height;
+ for (int y = 0; y < lines; ++y) {
socket->write (p, line_size()[i]);
p += stride()[i];
}
}
}
-
float
Image::bytes_per_pixel (int c) const
{
AVPixFmtDescriptor const * d = av_pix_fmt_desc_get(_pixel_format);
if (!d) {
- throw PixelFormatError ("lines()", _pixel_format);
+ throw PixelFormatError ("bytes_per_pixel()", _pixel_format);
}
- if (c >= components()) {
+ if (c >= planes()) {
return 0;
}
float bpp[4] = { 0, 0, 0, 0 };
- bpp[0] = floor ((d->comp[0].depth_minus1 + 1 + 7) / 8);
+#ifdef DCPOMATIC_HAVE_AVCOMPONENTDESCRIPTOR_DEPTH_MINUS1
+ bpp[0] = floor ((d->comp[0].depth_minus1 + 8) / 8);
+ if (d->nb_components > 1) {
+ bpp[1] = floor ((d->comp[1].depth_minus1 + 8) / 8) / pow (2.0f, d->log2_chroma_w);
+ }
+ if (d->nb_components > 2) {
+ bpp[2] = floor ((d->comp[2].depth_minus1 + 8) / 8) / pow (2.0f, d->log2_chroma_w);
+ }
+ if (d->nb_components > 3) {
+ bpp[3] = floor ((d->comp[3].depth_minus1 + 8) / 8) / pow (2.0f, d->log2_chroma_w);
+ }
+#else
+ bpp[0] = floor ((d->comp[0].depth + 7) / 8);
if (d->nb_components > 1) {
- bpp[1] = floor ((d->comp[1].depth_minus1 + 1 + 7) / 8) / pow (2.0f, d->log2_chroma_w);
+ bpp[1] = floor ((d->comp[1].depth + 7) / 8) / pow (2.0f, d->log2_chroma_w);
}
if (d->nb_components > 2) {
- bpp[2] = floor ((d->comp[2].depth_minus1 + 1 + 7) / 8) / pow (2.0f, d->log2_chroma_w);
+ bpp[2] = floor ((d->comp[2].depth + 7) / 8) / pow (2.0f, d->log2_chroma_w);
}
if (d->nb_components > 3) {
- bpp[3] = floor ((d->comp[3].depth_minus1 + 1 + 7) / 8) / pow (2.0f, d->log2_chroma_w);
+ bpp[3] = floor ((d->comp[3].depth + 7) / 8) / pow (2.0f, d->log2_chroma_w);
}
-
- if ((d->flags & PIX_FMT_PLANAR) == 0) {
+#endif
+
+ if ((d->flags & AV_PIX_FMT_FLAG_PLANAR) == 0) {
/* Not planar; sum them up */
return bpp[0] + bpp[1] + bpp[2] + bpp[3];
}
*
* @param p Pixel format.
* @param s Size in pixels.
+ * @param aligned true to make each row of this image aligned to a 32-byte boundary.
*/
Image::Image (AVPixelFormat p, dcp::Size s, bool aligned)
- : dcp::Image (s)
+ : _size (s)
, _pixel_format (p)
, _aligned (aligned)
{
{
_data = (uint8_t **) wrapped_av_malloc (4 * sizeof (uint8_t *));
_data[0] = _data[1] = _data[2] = _data[3] = 0;
-
+
_line_size = (int *) wrapped_av_malloc (4 * sizeof (int));
_line_size[0] = _line_size[1] = _line_size[2] = _line_size[3] = 0;
-
+
_stride = (int *) wrapped_av_malloc (4 * sizeof (int));
_stride[0] = _stride[1] = _stride[2] = _stride[3] = 0;
- for (int i = 0; i < components(); ++i) {
+ for (int i = 0; i < planes(); ++i) {
_line_size[i] = ceil (_size.width * bytes_per_pixel(i));
_stride[i] = stride_round_up (i, _line_size, _aligned ? 32 : 1);
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.
+
+ In addition to these concerns, we may read/write as much as a whole extra line
+ at the end of each plane in cases where we are messing with offsets in order to
+ do pad or crop. To solve this we over-allocate by an extra _stride[i] bytes.
+
+ As an example: we may write to images starting at an offset so we get some padding.
+ Hence we want to write in the following pattern:
+
+ block start write start line end
+ |..(padding)..|<------line-size------------->|..(padding)..|
+ |..(padding)..|<------line-size------------->|..(padding)..|
+ |..(padding)..|<------line-size------------->|..(padding)..|
+
+ where line-size is of the smaller (inter_size) image and the full padded line length is that of
+ out_size. To get things to work we have to tell FFmpeg that the stride is that of out_size.
+ However some parts of FFmpeg (notably rgb48Toxyz12 in swscale.c) process data for the full
+ specified *stride*. This does not matter until we get to the last line:
+
+ block start write start line end
+ |..(padding)..|<------line-size------------->|XXXwrittenXXX|
+ |XXXwrittenXXX|<------line-size------------->|XXXwrittenXXX|
+ |XXXwrittenXXX|<------line-size------------->|XXXwrittenXXXXXXwrittenXXX
+ ^^^^ out of bounds
+ */
+ _data[i] = (uint8_t *) wrapped_av_malloc (_stride[i] * (sample_size(i).height + 1) + 32);
+#if HAVE_VALGRIND_MEMCHECK_H
+ /* The data between the end of the line size and the stride is undefined but processed by
+ libswscale, causing lots of valgrind errors. Mark it all defined to quell these errors.
*/
- _data[i] = (uint8_t *) wrapped_av_malloc (_stride[i] * lines (i) + 32);
+ VALGRIND_MAKE_MEM_DEFINED (_data[i], _stride[i] * (sample_size(i).height + 1) + 32);
+#endif
}
}
Image::Image (Image const & other)
- : dcp::Image (other)
- , _pixel_format (other._pixel_format)
+ : boost::enable_shared_from_this<Image>(other)
+ , _size (other._size)
+ , _pixel_format (other._pixel_format)
, _aligned (other._aligned)
{
allocate ();
- for (int i = 0; i < components(); ++i) {
+ for (int i = 0; i < planes(); ++i) {
uint8_t* p = _data[i];
uint8_t* q = other._data[i];
- for (int j = 0; j < lines(i); ++j) {
+ int const lines = sample_size(i).height;
+ for (int j = 0; j < lines; ++j) {
memcpy (p, q, _line_size[i]);
p += stride()[i];
q += other.stride()[i];
}
Image::Image (AVFrame* frame)
- : dcp::Image (dcp::Size (frame->width, frame->height))
+ : _size (frame->width, frame->height)
, _pixel_format (static_cast<AVPixelFormat> (frame->format))
, _aligned (true)
{
allocate ();
- for (int i = 0; i < components(); ++i) {
+ for (int i = 0; i < planes(); ++i) {
uint8_t* p = _data[i];
uint8_t* q = frame->data[i];
- for (int j = 0; j < lines(i); ++j) {
+ int const lines = sample_size(i).height;
+ for (int j = 0; j < lines; ++j) {
memcpy (p, q, _line_size[i]);
p += stride()[i];
/* AVFrame's linesize is what we call `stride' */
}
Image::Image (shared_ptr<const Image> other, bool aligned)
- : dcp::Image (other)
+ : _size (other->_size)
, _pixel_format (other->_pixel_format)
, _aligned (aligned)
{
allocate ();
- for (int i = 0; i < components(); ++i) {
- assert(line_size()[i] == other->line_size()[i]);
+ for (int i = 0; i < planes(); ++i) {
+ DCPOMATIC_ASSERT (line_size()[i] == other->line_size()[i]);
uint8_t* p = _data[i];
uint8_t* q = other->data()[i];
- for (int j = 0; j < lines(i); ++j) {
+ int const lines = sample_size(i).height;
+ for (int j = 0; j < lines; ++j) {
memcpy (p, q, line_size()[i]);
p += stride()[i];
q += other->stride()[i];
void
Image::swap (Image & other)
{
- dcp::Image::swap (other);
-
+ std::swap (_size, other._size);
std::swap (_pixel_format, other._pixel_format);
for (int i = 0; i < 4; ++i) {
/** Destroy a Image */
Image::~Image ()
{
- for (int i = 0; i < components(); ++i) {
+ for (int i = 0; i < planes(); ++i) {
av_free (_data[i]);
}
av_free (_stride);
}
-uint8_t **
+uint8_t * const *
Image::data () const
{
return _data;
}
-int *
+int const *
Image::line_size () const
{
return _line_size;
}
-int *
+int const *
Image::stride () const
{
return _stride;
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 ();
-}
-
bool
operator== (Image const & a, Image const & b)
{
- if (a.components() != b.components() || a.pixel_format() != b.pixel_format() || a.aligned() != b.aligned()) {
+ if (a.planes() != b.planes() || a.pixel_format() != b.pixel_format() || a.aligned() != b.aligned()) {
return false;
}
- for (int c = 0; c < a.components(); ++c) {
- if (a.lines(c) != b.lines(c) || a.line_size()[c] != b.line_size()[c] || a.stride()[c] != b.stride()[c]) {
+ for (int c = 0; c < a.planes(); ++c) {
+ 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]) {
return false;
}
uint8_t* p = a.data()[c];
uint8_t* q = b.data()[c];
- for (int y = 0; y < a.lines(c); ++y) {
+ int const lines = a.sample_size(c).height;
+ for (int y = 0; y < lines; ++y) {
if (memcmp (p, q, a.line_size()[c]) != 0) {
return false;
}
return true;
}
+
+/** Fade the image.
+ * @param f Amount to fade by; 0 is black, 1 is no fade.
+ */
+void
+Image::fade (float f)
+{
+ /* U/V black value for 8-bit colour */
+ static int const eight_bit_uv = (1 << 7) - 1;
+ /* U/V black value for 10-bit colour */
+ static uint16_t const ten_bit_uv = (1 << 9) - 1;
+
+ switch (_pixel_format) {
+ case AV_PIX_FMT_YUV420P:
+ {
+ /* Y */
+ uint8_t* p = data()[0];
+ int const lines = sample_size(0).height;
+ for (int y = 0; y < lines; ++y) {
+ uint8_t* q = p;
+ for (int x = 0; x < line_size()[0]; ++x) {
+ *q = int(float(*q) * f);
+ ++q;
+ }
+ p += stride()[0];
+ }
+
+ /* U, V */
+ for (int c = 1; c < 3; ++c) {
+ uint8_t* p = data()[c];
+ int const lines = sample_size(c).height;
+ for (int y = 0; y < lines; ++y) {
+ uint8_t* q = p;
+ for (int x = 0; x < line_size()[c]; ++x) {
+ *q = eight_bit_uv + int((int(*q) - eight_bit_uv) * f);
+ ++q;
+ }
+ p += stride()[c];
+ }
+ }
+
+ break;
+ }
+
+ case AV_PIX_FMT_RGB24:
+ {
+ /* 8-bit */
+ uint8_t* p = data()[0];
+ int const lines = sample_size(0).height;
+ for (int y = 0; y < lines; ++y) {
+ uint8_t* q = p;
+ for (int x = 0; x < line_size()[0]; ++x) {
+ *q = int (float (*q) * f);
+ ++q;
+ }
+ p += stride()[0];
+ }
+ break;
+ }
+
+ case AV_PIX_FMT_XYZ12LE:
+ case AV_PIX_FMT_RGB48LE:
+ /* 16-bit little-endian */
+ for (int c = 0; c < 3; ++c) {
+ int const stride_pixels = stride()[c] / 2;
+ int const line_size_pixels = line_size()[c] / 2;
+ uint16_t* p = reinterpret_cast<uint16_t*> (data()[c]);
+ int const lines = sample_size(c).height;
+ for (int y = 0; y < lines; ++y) {
+ uint16_t* q = p;
+ for (int x = 0; x < line_size_pixels; ++x) {
+ *q = int (float (*q) * f);
+ ++q;
+ }
+ p += stride_pixels;
+ }
+ }
+ break;
+
+ case AV_PIX_FMT_YUV422P10LE:
+ {
+ /* Y */
+ {
+ int const stride_pixels = stride()[0] / 2;
+ int const line_size_pixels = line_size()[0] / 2;
+ uint16_t* p = reinterpret_cast<uint16_t*> (data()[0]);
+ int const lines = sample_size(0).height;
+ for (int y = 0; y < lines; ++y) {
+ uint16_t* q = p;
+ for (int x = 0; x < line_size_pixels; ++x) {
+ *q = int(float(*q) * f);
+ ++q;
+ }
+ p += stride_pixels;
+ }
+ }
+
+ /* U, V */
+ for (int c = 1; c < 3; ++c) {
+ int const stride_pixels = stride()[c] / 2;
+ int const line_size_pixels = line_size()[c] / 2;
+ uint16_t* p = reinterpret_cast<uint16_t*> (data()[c]);
+ int const lines = sample_size(c).height;
+ for (int y = 0; y < lines; ++y) {
+ uint16_t* q = p;
+ for (int x = 0; x < line_size_pixels; ++x) {
+ *q = ten_bit_uv + int((int(*q) - ten_bit_uv) * f);
+ ++q;
+ }
+ p += stride_pixels;
+ }
+ }
+ break;
+
+ }
+
+ default:
+ throw PixelFormatError ("fade()", _pixel_format);
+ }
+}
+
+shared_ptr<const Image>
+Image::ensure_aligned (shared_ptr<const Image> image)
+{
+ if (image->aligned()) {
+ return image;
+ }
+
+ return shared_ptr<Image> (new Image (image, true));
+}
+
+size_t
+Image::memory_used () const
+{
+ size_t m = 0;
+ for (int i = 0; i < planes(); ++i) {
+ m += _stride[i] * sample_size(i).height;
+ }
+ return m;
+}
+
+class Memory
+{
+public:
+ Memory ()
+ : data(0)
+ , size(0)
+ {}
+
+ ~Memory ()
+ {
+ free (data);
+ }
+
+ uint8_t* data;
+ size_t size;
+};
+
+static void
+png_write_data (png_structp png_ptr, png_bytep data, png_size_t length)
+{
+ Memory* mem = reinterpret_cast<Memory*>(png_get_io_ptr(png_ptr));
+ size_t size = mem->size + length;
+
+ if (mem->data) {
+ mem->data = reinterpret_cast<uint8_t*>(realloc(mem->data, size));
+ } else {
+ mem->data = reinterpret_cast<uint8_t*>(malloc(size));
+ }
+
+ if (!mem->data) {
+ throw EncodeError (N_("could not allocate memory for PNG"));
+ }
+
+ memcpy (mem->data + mem->size, data, length);
+ mem->size += length;
+}
+
+static void
+png_flush (png_structp)
+{
+
+}
+
+static void
+png_error_fn (png_structp png_ptr, char const * message)
+{
+ reinterpret_cast<Image*>(png_get_error_ptr(png_ptr))->png_error (message);
+}
+
+void
+Image::png_error (char const * message)
+{
+ throw EncodeError (String::compose ("Error during PNG write: %1", message));
+}
+
+dcp::Data
+Image::as_png () const
+{
+ DCPOMATIC_ASSERT (bytes_per_pixel(0) == 4);
+ DCPOMATIC_ASSERT (planes() == 1);
+ if (pixel_format() != AV_PIX_FMT_RGBA) {
+ return convert_pixel_format(dcp::YUV_TO_RGB_REC709, AV_PIX_FMT_RGBA, true, false)->as_png();
+ }
+
+ /* error handling? */
+ png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, reinterpret_cast<void*>(const_cast<Image*>(this)), png_error_fn, 0);
+ if (!png_ptr) {
+ throw EncodeError (N_("could not create PNG write struct"));
+ }
+
+ Memory state;
+
+ png_set_write_fn (png_ptr, &state, png_write_data, png_flush);
+
+ png_infop info_ptr = png_create_info_struct(png_ptr);
+ if (!info_ptr) {
+ png_destroy_write_struct (&png_ptr, &info_ptr);
+ throw EncodeError (N_("could not create PNG info struct"));
+ }
+
+ png_set_IHDR (png_ptr, info_ptr, size().width, size().height, 8, PNG_COLOR_TYPE_RGBA, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
+
+ png_byte ** row_pointers = reinterpret_cast<png_byte **>(png_malloc(png_ptr, size().height * sizeof(png_byte *)));
+ for (int i = 0; i < size().height; ++i) {
+ row_pointers[i] = (png_byte *) (data()[0] + i * stride()[0]);
+ }
+
+ png_write_info (png_ptr, info_ptr);
+ png_write_image (png_ptr, row_pointers);
+ png_write_end (png_ptr, info_ptr);
+
+ png_destroy_write_struct (&png_ptr, &info_ptr);
+ png_free (png_ptr, row_pointers);
+
+ return dcp::Data (state.data, state.size);
+}
projects / dcpomatic.git / blobdiff