[gnome-photos/wip/rishi/buffer-decoder: 1/4] Add a convenient C API over the lower-level C++ Rawspeed API
- From: Debarshi Ray <debarshir src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gnome-photos/wip/rishi/buffer-decoder: 1/4] Add a convenient C API over the lower-level C++ Rawspeed API
- Date: Tue, 2 Jul 2019 18:24:10 +0000 (UTC)
commit 623ba18255a9785dbf92dff933c6803b9dadad5e
Author: Debarshi Ray <debarshir gnome org>
Date: Sun Jun 2 10:26:48 2019 +0000
Add a convenient C API over the lower-level C++ Rawspeed API
Subsequent commits will use this to add a codec for RAW files.
https://gitlab.gnome.org/GNOME/gnome-photos/issues/63
meson.build | 2 +-
src/meson.build | 6 +
src/photos-rawspeed.cpp | 999 ++++++++++++++++++++++++++++++++++++++++++++++++
src/photos-rawspeed.h | 31 ++
4 files changed, 1037 insertions(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index d3b60622..a1e19af9 100644
--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,6 @@
project(
'gnome-photos',
- 'c',
+ ['c', 'cpp'],
version: '3.33.1',
license: 'GPL3+',
default_options: 'buildtype=debugoptimized',
diff --git a/src/meson.build b/src/meson.build
index fed2f2ea..5752133d 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -22,6 +22,7 @@ sources = files(
'photos-pipeline.c',
'photos-png-count.c',
'photos-quarks.c',
+ 'photos-rawspeed.cpp',
)
thumbnailer_dbus = 'photos-thumbnailer-dbus'
@@ -82,6 +83,10 @@ libgnome_photos_built_sources_resources = gnome.compile_resources(
libgnome_photos_built_headers += libgnome_photos_built_sources_resources[1]
sources += libgnome_photos_built_sources_resources
+cppflags = [
+ '-DPACKAGE_DATA_DIR="@0@"'.format(photos_pkg_datadir),
+]
+
deps = [
babl_dep,
gegl_dep,
@@ -100,6 +105,7 @@ deps = [
libgnome_photos = shared_library(
meson.project_name(),
sources,
+ cpp_args: cppflags,
dependencies: deps,
include_directories: top_inc,
install: true,
diff --git a/src/photos-rawspeed.cpp b/src/photos-rawspeed.cpp
new file mode 100644
index 00000000..b55fcfaf
--- /dev/null
+++ b/src/photos-rawspeed.cpp
@@ -0,0 +1,999 @@
+/*
+ * Photos - access, organize and share your photos on GNOME
+ * Copyright © 2019 Red Hat, Inc.
+ *
+ * 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
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Based on code from:
+ * + Darktable
+ */
+
+
+#include "config.h"
+
+#include <cmath>
+#include <memory>
+#include <string>
+
+#include <babl/babl.h>
+#include <glib/gi18n.h>
+#include <RawSpeed-API.h>
+
+#include "photos-debug.h"
+#include "photos-error.h"
+#include "photos-rawspeed.h"
+
+
+enum
+{
+ N_BAYER_INDICES = 4,
+ N_COEFFICIENTS = 4,
+ N_PROCESSED_MAXIMUMS = 4,
+ N_XTRANS = 6
+};
+
+static std::shared_ptr<rawspeed::CameraMetaData> metadata;
+
+
+static void
+photos_rawspeed_destroy_image (rawspeed::RawImage *image)
+{
+ delete image;
+}
+
+
+static gint
+photos_rawspeed_get_2x2_bayer_index (gint crop_x, gint crop_y, gint x, gint y)
+{
+ const gint index = ((crop_x + x) & 1) + (((crop_y + y) & 1) << 1);
+
+ g_return_val_if_fail (0 <= index && index < N_BAYER_INDICES, 0);
+ return index;
+}
+
+
+static const Babl *
+photos_rawspeed_get_format (rawspeed::RawImageType image_type, gsize components)
+{
+ g_return_val_if_fail ((components == 1
+ && (image_type == rawspeed::TYPE_FLOAT32 || image_type == rawspeed::TYPE_USHORT16))
+ || (components == 3 && image_type == rawspeed::TYPE_FLOAT32),
+ NULL);
+
+ std::string format_name;
+
+ switch (components)
+ {
+ case 1:
+ format_name = "Y";
+ break;
+
+ case 3:
+ format_name = "RGB";
+ break;
+
+ default:
+ g_assert_not_reached ();
+ break;
+ }
+
+ format_name += " ";
+
+ switch (image_type)
+ {
+ case rawspeed::TYPE_FLOAT32:
+ format_name += "float";
+ break;
+
+ case rawspeed::TYPE_USHORT16:
+ format_name += "u16";
+ break;
+
+ default:
+ g_assert_not_reached ();
+ break;
+ }
+
+ const Babl *format = babl_format (format_name.c_str ());
+ return format;
+}
+
+
+static GeglBuffer *
+photos_rawspeed_buffer_new_from_image (rawspeed::RawImage image, gsize components)
+{
+ GeglBuffer *ret_val = NULL;
+ rawspeed::RawImageData *image_data = image.get ();
+
+ const guchar *data_uncropped = image_data->getDataUncropped (0, 0);
+
+ const rawspeed::RawImageType image_type = image_data->getDataType ();
+ const Babl *format = photos_rawspeed_get_format (image_type, components);
+
+ const rawspeed::iPoint2D dimensions_uncropped = image_data->getUncroppedDim();
+
+ GeglRectangle bbox_uncropped;
+ gegl_rectangle_set (&bbox_uncropped,
+ 0,
+ 0,
+ static_cast<guint> (dimensions_uncropped.x),
+ static_cast<guint> (dimensions_uncropped.y));
+
+ const gint stride = static_cast<gint> (image_data->pitch);
+ rawspeed::RawImage *image_copy = new rawspeed::RawImage (image);
+
+ g_autoptr (GeglBuffer) buffer_uncropped
+ = gegl_buffer_linear_new_from_data ((const gpointer) data_uncropped,
+ format,
+ &bbox_uncropped,
+ stride,
+ reinterpret_cast<GDestroyNotify> (photos_rawspeed_destroy_image),
+ image_copy);
+
+ const rawspeed::iPoint2D dimensions_cropped = image_data->dim;
+ const rawspeed::iPoint2D crop_offset = image_data->getCropOffset ();
+
+ GeglRectangle bbox_cropped;
+ gegl_rectangle_set (&bbox_cropped,
+ crop_offset.x,
+ crop_offset.y,
+ static_cast<guint> (dimensions_cropped.x),
+ static_cast<guint> (dimensions_cropped.y));
+
+ g_autoptr (GeglBuffer) buffer_cropped = gegl_buffer_create_sub_buffer (buffer_uncropped, &bbox_cropped);
+
+ g_autoptr (GeglBuffer) buffer_shifted = static_cast<GeglBuffer *> (g_object_new (GEGL_TYPE_BUFFER,
+ "abyss-width", -1,
+ "shift-x", crop_offset.x,
+ "shift-y", crop_offset.y,
+ "source", buffer_cropped,
+ NULL));
+
+ ret_val = static_cast<GeglBuffer *> (g_object_ref (buffer_shifted));
+ return ret_val;
+}
+
+
+static gint
+photos_rawspeed_calculate_pattern_color_bayer (const gsize row, const gsize column, const guint32 filters)
+{
+ const gint ret_val = filters >> (((row << 1 & 14) + (column & 1)) << 1) & 3;
+ g_return_val_if_fail (0 <= ret_val && ret_val < N_COEFFICIENTS, 0);
+
+ return ret_val;
+}
+
+
+static gint
+photos_rawspeed_calculate_pattern_color_xtrans (gsize column,
+ gsize row,
+ const GeglRectangle *bbox,
+ const guint8 (*const xtrans)[6])
+{
+ gint ret_val = 0;
+
+ g_return_val_if_fail (xtrans != 0, 0);
+
+ column += 600;
+ row += 600;
+ g_return_val_if_fail (column >=0 && row >= 0, 0);
+
+ if (bbox != NULL)
+ {
+ column += bbox->x;
+ row += bbox->y;
+ }
+
+ ret_val = xtrans[row % N_XTRANS][column % N_XTRANS];
+ g_return_val_if_fail (0 <= ret_val && ret_val < N_COEFFICIENTS, 0);
+
+ return ret_val;
+}
+
+
+static gboolean
+photos_rawspeed_ensure_metadata (GError **error)
+{
+ static GError *local_error = NULL;
+ static gsize once_init_value = 0;
+ gboolean ret_val = FALSE;
+
+ if (g_once_init_enter (&once_init_value))
+ {
+ const std::string path = PACKAGE_DATA_DIR G_DIR_SEPARATOR_S "cameras.xml";
+
+ try
+ {
+ metadata.reset (new rawspeed::CameraMetaData (path.c_str()));
+ }
+ catch (rawspeed::RawspeedException &e)
+ {
+ g_set_error (&local_error, PHOTOS_ERROR, 0, e.what());
+ }
+
+ g_once_init_leave (&once_init_value, 1);
+ }
+
+ if (local_error != NULL)
+ {
+ g_propagate_error (error, g_error_copy (local_error));
+ return ret_val;
+ }
+
+ ret_val = TRUE;
+ return ret_val;
+}
+
+
+static bool
+photos_rawspeed_is_4bayer (guint32 filters)
+{
+ bool is_4bayer = false;
+
+ /* cyan, yellow, green, magenta */
+ if (filters == 0xb4b4b4b4 || filters == 0x4b4b4b4b || filters == 0x1e1e1e1e || filters == 0xe1e1e1e1)
+ is_4bayer = true;
+ /* red, green, blue, emerald */
+ else if (filters == 0x63636363 || filters == 0x36363636 || filters == 0x9c9c9c9c || filters == 0xc9c9c9c9)
+ is_4bayer = true;
+
+ return is_4bayer;
+}
+
+
+static bool
+photos_rawspeed_is_normalized (rawspeed::RawImageType image_type, guint32 filters, guint32 white_point)
+{
+ bool is_normalized;
+
+ if (filters != 0 && image_type == rawspeed::TYPE_FLOAT32)
+ {
+ union
+ {
+ gfloat f;
+ guint32 u;
+ } normalized;
+
+ normalized.f = 1.0f;
+ is_normalized = white_point == normalized.u;
+ }
+ else
+ {
+ is_normalized = image_type == rawspeed::TYPE_FLOAT32;
+ }
+
+ return is_normalized;
+}
+
+
+static rawspeed::RawImage
+photos_rawspeed_decode_bytes_to_image (GBytes *bytes, GError **error)
+{
+ rawspeed::RawImage ret_val = rawspeed::RawImage::create (rawspeed::TYPE_USHORT16);
+
+ gsize count;
+ const guchar *data = (const guchar *) g_bytes_get_data (bytes, &count);
+
+ rawspeed::Buffer rs_buffer (data, count);
+ rawspeed::RawParser parser (&rs_buffer);
+
+ std::unique_ptr<rawspeed::RawDecoder> decoder;
+
+ try
+ {
+ decoder = parser.getDecoder(metadata.get());
+ }
+ catch (rawspeed::RawspeedException &e)
+ {
+ g_set_error (error, PHOTOS_ERROR, 0, e.what());
+ return ret_val;
+ }
+
+ decoder->failOnUnknown = true;
+
+ try
+ {
+ decoder->checkSupport (metadata.get());
+ }
+ catch (rawspeed::RawspeedException &e)
+ {
+ g_set_error (error, PHOTOS_ERROR, 0, e.what());
+ return ret_val;
+ }
+
+ try
+ {
+ decoder->decodeRaw ();
+ decoder->decodeMetaData (metadata.get());
+ }
+ catch (rawspeed::RawspeedException &e)
+ {
+ g_set_error (error, PHOTOS_ERROR, 0, e.what());
+ return ret_val;
+ }
+
+ ret_val = decoder->mRaw;
+ return ret_val;
+}
+
+
+static GeglBuffer *
+photos_rawspeed_op_apply_white_balance (GeglBuffer *buffer_input,
+ rawspeed::RawImageData *image_data,
+ gfloat processed_maximums[4],
+ gsize components,
+ guint32 filters)
+{
+ GeglBuffer *ret_val = NULL;
+
+ g_return_val_if_fail (filters == 0 || (filters != 0 && components == 1), NULL);
+
+ bool are_coefficients_valid = true;
+ gfloat coefficients[N_COEFFICIENTS];
+
+ const bool is_4bayer = photos_rawspeed_is_4bayer (filters);
+ photos_debug (PHOTOS_DEBUG_GEGL, "Rawspeed: Is 4bayer: %s", is_4bayer ? "true" : "false");
+
+ /* The fourth value is usually NAN for non-4Bayer images. */
+ const guint n_coefficients_to_check = is_4bayer ? 4 : 3;
+ for (guint i = 0; i < G_N_ELEMENTS (coefficients); i++)
+ {
+ if (i < n_coefficients_to_check
+ && (!std::isnormal (image_data->metadata.wbCoeffs[i])
+ || G_APPROX_VALUE (image_data->metadata.wbCoeffs[i], 0.0f, PHOTOS_EPSILON)))
+ {
+ are_coefficients_valid = false;
+ break;
+ }
+
+ coefficients[i] = image_data->metadata.wbCoeffs[i];
+ }
+
+ photos_debug (PHOTOS_DEBUG_GEGL,
+ "Rawspeed: Camera white balance coefficients valid: %s",
+ are_coefficients_valid ? "true" : "false");
+
+ if (!are_coefficients_valid)
+ {
+ static_assert(G_N_ELEMENTS (coefficients) == 4, "Value of N_COEFFICIENTS has changed");
+ coefficients[0] = 2.0f;
+ coefficients[1] = 1.0f;
+ coefficients[2] = 1.5f;
+ coefficients[3] = 1.0f;
+ }
+
+ static_assert(G_N_ELEMENTS (coefficients) == 4, "Value of N_COEFFICIENTS has changed");
+ coefficients[0] = 1.0f / coefficients[1];
+ coefficients[2] = 1.0f / coefficients[1];
+ coefficients[3] = 1.0f / coefficients[1];
+ coefficients[1] = 1.0f;
+
+ const Babl *format = gegl_buffer_get_format (buffer_input);
+ const GeglAbyssPolicy abyss_policy = static_cast<GeglAbyssPolicy> (GEGL_ABYSS_NONE |
GEGL_BUFFER_FILTER_AUTO);
+ const GeglRectangle bbox = *gegl_buffer_get_extent (buffer_input);
+ GeglBufferIterator *it = gegl_buffer_iterator_new (buffer_input,
+ &bbox,
+ 0,
+ format,
+ GEGL_ACCESS_READWRITE,
+ abyss_policy,
+ 1);
+
+ if (filters == 9)
+ {
+ guint8 xtrans[N_XTRANS][N_XTRANS];
+
+ for (gint i = 0; i < N_XTRANS; i++)
+ {
+ for (gint j = 0; j < N_XTRANS; j++)
+ xtrans[j][i] = image_data->cfa.getColorAt (i, j);
+ }
+
+ while (gegl_buffer_iterator_next (it))
+ {
+ GeglBufferIteratorItem *item = &it->items[0];
+ const GeglRectangle &roi = item->roi;
+
+ const gfloat *const in = static_cast<gfloat *> (item->data);
+ gfloat *const out = static_cast<gfloat *> (item->data);
+
+ for (gint j = 0, y = roi.y; j < roi.height; j++, y++)
+ {
+ for (gint i = 0, x = roi.x; i < roi.width; i++, x++)
+ {
+ const gint fc = photos_rawspeed_calculate_pattern_color_xtrans (x, y, &bbox, xtrans);
+
+ const gsize offset = static_cast<gsize> (j) * static_cast<gsize> (roi.width)
+ + static_cast<gsize> (i);
+
+ out[offset] = in[offset] * coefficients[fc];
+ }
+ }
+ }
+ }
+ else if (filters != 0)
+ {
+ while (gegl_buffer_iterator_next (it))
+ {
+ GeglBufferIteratorItem *item = &it->items[0];
+ const GeglRectangle &roi = item->roi;
+
+ const gfloat *const in = static_cast<gfloat *> (item->data);
+ gfloat *const out = static_cast<gfloat *> (item->data);
+
+ for (gint j = 0, y = roi.y; j < roi.height; j++, y++)
+ {
+ for (gint i = 0, x = roi.x; i < roi.width; i++, x++)
+ {
+ const gint fc = photos_rawspeed_calculate_pattern_color_bayer (x, y, filters);
+
+ const gsize offset = static_cast<gsize> (j) * static_cast<gsize> (roi.width)
+ + static_cast<gsize> (i);
+
+ out[offset] = in[offset] * coefficients[fc];
+ }
+ }
+ }
+ }
+ else
+ {
+ while (gegl_buffer_iterator_next (it))
+ {
+ GeglBufferIteratorItem *item = &it->items[0];
+ const GeglRectangle &roi = item->roi;
+
+ const gfloat *const in = static_cast<gfloat *> (item->data);
+ gfloat *const out = static_cast<gfloat *> (item->data);
+
+ for (gint j = 0, y = roi.y; j < roi.height; j++, y++)
+ {
+ for (gint i = 0, x = roi.x; i < roi.width; i++, x++)
+ {
+ for (gsize c = 0; c < components; c++)
+ {
+ const gsize offset = components
+ * (static_cast<gsize> (j) * static_cast<gsize> (roi.width)
+ + static_cast<gsize> (i))
+ + c;
+
+ out[offset] = in[offset] * coefficients[c];
+ }
+ }
+ }
+ }
+ }
+
+ static_assert(G_N_ELEMENTS (coefficients) == N_PROCESSED_MAXIMUMS, "Size of the arrays have changed");
+ for (guint i = 0; i < G_N_ELEMENTS (coefficients); i++)
+ processed_maximums[i] *= coefficients[i];
+
+ ret_val = static_cast<GeglBuffer *> (g_object_ref (buffer_input));
+ return ret_val;
+}
+
+
+static GeglBuffer *
+photos_rawspeed_op_correct_black_white_point (GeglBuffer *buffer_input,
+ rawspeed::RawImageData *image_data,
+ gfloat processed_maximums[4],
+ gsize components,
+ guint32 filters)
+{
+ GeglBuffer *ret_val = NULL;
+
+ const rawspeed::RawImageType image_type = image_data->getDataType ();
+ if (photos_rawspeed_is_normalized (image_type, filters, static_cast<guint32> (image_data->whitePoint)))
+ {
+ ret_val = static_cast<GeglBuffer *> (g_object_ref (buffer_input));
+ return ret_val;
+ }
+
+ gfloat div[N_BAYER_INDICES];
+ gfloat sub[N_BAYER_INDICES];
+ const std::size_t black_level_separate_size = image_data->blackLevelSeparate.size ();
+
+ if (filters == 0)
+ {
+ const gfloat white = static_cast<gfloat> (image_data->whitePoint) / static_cast<gfloat> (G_MAXUINT16);
+ gfloat black = 0.0f;
+
+ for (std::size_t i = 0; i < black_level_separate_size; i++)
+ black += static_cast<gfloat> (image_data->blackLevelSeparate[i]) / static_cast<gfloat> (G_MAXUINT16);
+
+ black /= static_cast<gfloat> (black_level_separate_size);
+
+ for (guint i = 0; i < G_N_ELEMENTS (div); i++)
+ {
+ sub[i] = black;
+ div[i] = white - sub[i];
+ }
+ }
+ else
+ {
+ const gfloat white = static_cast<gfloat> (image_data->whitePoint);
+
+ for (guint i = 0; i < G_N_ELEMENTS (div); i++)
+ {
+ sub[i] = static_cast<gfloat> (image_data->blackLevelSeparate[i]);
+ div[i] = white - sub[i];
+ }
+ }
+
+ const GeglAbyssPolicy abyss_policy = static_cast<GeglAbyssPolicy> (GEGL_ABYSS_NONE |
GEGL_BUFFER_FILTER_AUTO);
+ const GeglRectangle bbox = *gegl_buffer_get_extent (buffer_input);
+
+ const Babl *format_input = gegl_buffer_get_format (buffer_input);
+ GeglBufferIterator *it = gegl_buffer_iterator_new (buffer_input,
+ &bbox,
+ 0,
+ format_input,
+ GEGL_ACCESS_READ,
+ abyss_policy,
+ 2);
+ const gint it_input_handle = 0;
+
+ const Babl *format_output = photos_rawspeed_get_format (rawspeed::TYPE_FLOAT32, components);
+ g_autoptr (GeglBuffer) buffer_output = gegl_buffer_new (&bbox, format_output);
+
+ const gint it_output_handle = gegl_buffer_iterator_add (it,
+ buffer_output,
+ &bbox,
+ 0,
+ format_output,
+ GEGL_ACCESS_WRITE,
+ abyss_policy);
+
+ const rawspeed::iPoint2D crop_offset_top_left = image_data->getCropOffset ();
+
+ if (filters != 0 && components == 1 && image_type == rawspeed::TYPE_USHORT16)
+ {
+ while (gegl_buffer_iterator_next (it))
+ {
+ GeglBufferIteratorItem *item_input = &it->items[it_input_handle];
+ GeglBufferIteratorItem *item_output = &it->items[it_output_handle];
+ g_assert_cmpint (item_input->roi.height, ==, item_output->roi.height);
+ g_assert_cmpint (item_input->roi.width, ==, item_output->roi.width);
+ g_assert_cmpint (item_input->roi.x, ==, item_output->roi.x);
+ g_assert_cmpint (item_input->roi.y, ==, item_output->roi.y);
+
+ const GeglRectangle roi = item_input->roi;
+
+ const guint16 *const in = static_cast<guint16 *> (item_input->data);
+ gfloat *const out = static_cast<gfloat *> (item_output->data);
+
+ for (gint j = 0, y = roi.y; j < roi.height; j++, y++)
+ {
+ for (gint i = 0, x = roi.x; i < roi.width; i++, x++)
+ {
+ const gint bayer_index = photos_rawspeed_get_2x2_bayer_index (crop_offset_top_left.x,
+ crop_offset_top_left.y,
+ x,
+ y);
+
+ const gsize offset = static_cast<gsize> (j) * static_cast<gsize> (roi.width)
+ + static_cast<gsize> (i);
+
+ out[offset] = (static_cast<gfloat> (in[offset]) - sub[bayer_index]) / div[bayer_index];
+ }
+ }
+ }
+ }
+ else if (filters != 0 && components == 1 && image_type == rawspeed::TYPE_FLOAT32)
+ {
+ while (gegl_buffer_iterator_next (it))
+ {
+ GeglBufferIteratorItem *item_input = &it->items[it_input_handle];
+ GeglBufferIteratorItem *item_output = &it->items[it_output_handle];
+ g_assert_cmpint (item_input->roi.height, ==, item_output->roi.height);
+ g_assert_cmpint (item_input->roi.width, ==, item_output->roi.width);
+ g_assert_cmpint (item_input->roi.x, ==, item_output->roi.x);
+ g_assert_cmpint (item_input->roi.y, ==, item_output->roi.y);
+
+ const GeglRectangle roi = item_input->roi;
+
+ const gfloat *const in = static_cast<gfloat *> (item_input->data);
+ gfloat *const out = static_cast<gfloat *> (item_output->data);
+
+ for (gint j = 0, y = roi.y; j < roi.height; j++, y++)
+ {
+ for (gint i = 0, x = roi.x; i < roi.width; i++, x++)
+ {
+ const gint bayer_index = photos_rawspeed_get_2x2_bayer_index (crop_offset_top_left.x,
+ crop_offset_top_left.y,
+ x,
+ y);
+
+ const gsize offset = static_cast<gsize> (j) * static_cast<gsize> (roi.width)
+ + static_cast<gsize> (i);
+
+ out[offset] = (in[offset] - sub[bayer_index]) / div[bayer_index];
+ }
+ }
+ }
+ }
+ else
+ {
+ while (gegl_buffer_iterator_next (it))
+ {
+ GeglBufferIteratorItem *item_input = &it->items[it_input_handle];
+ GeglBufferIteratorItem *item_output = &it->items[it_output_handle];
+ g_assert_cmpint (item_input->roi.height, ==, item_output->roi.height);
+ g_assert_cmpint (item_input->roi.width, ==, item_output->roi.width);
+ g_assert_cmpint (item_input->roi.x, ==, item_output->roi.x);
+ g_assert_cmpint (item_input->roi.y, ==, item_output->roi.y);
+
+ const GeglRectangle roi = item_input->roi;
+
+ const gfloat *const in = static_cast<gfloat *> (item_input->data);
+ gfloat *const out = static_cast<gfloat *> (item_output->data);
+
+ for (gint j = 0, y = roi.y; j < roi.height; j++, y++)
+ {
+ for (gint i = 0, x = roi.x; i < roi.width; i++, x++)
+ {
+ for (gsize c = 0; c < components; c++)
+ {
+ const gsize offset = components
+ * (static_cast<gsize> (j) * static_cast<gsize> (roi.width)
+ + static_cast<gsize> (i))
+ + c;
+
+ out[offset] = (in[offset] - sub[0]) / div[0];
+ }
+ }
+ }
+ }
+ }
+
+ ret_val = static_cast<GeglBuffer *> (g_object_ref (buffer_output));
+ return ret_val;
+}
+
+
+static GeglBuffer *
+photos_rawspeed_op_demosaic (GeglBuffer *buffer_input,
+ rawspeed::RawImageData *image_data,
+ gfloat processed_maximums[4],
+ gsize components,
+ guint32 filters)
+{
+ GeglBuffer *ret_val = NULL;
+
+ if (filters == 0)
+ {
+ ret_val = static_cast<GeglBuffer *> (g_object_ref (buffer_input));
+ return ret_val;
+ }
+
+ const GeglAbyssPolicy abyss_policy = static_cast<GeglAbyssPolicy> (GEGL_ABYSS_NONE |
GEGL_BUFFER_FILTER_AUTO);
+ const GeglRectangle bbox = *gegl_buffer_get_extent (buffer_input);
+
+ const Babl *format_input = gegl_buffer_get_format (buffer_input);
+ GeglBufferIterator *it = gegl_buffer_iterator_new (buffer_input,
+ &bbox,
+ 0,
+ format_input,
+ GEGL_ACCESS_READ,
+ abyss_policy,
+ 2);
+ const gint it_input_handle = 0;
+
+ const Babl *format_output = photos_rawspeed_get_format (rawspeed::TYPE_FLOAT32, 3);
+ g_autoptr (GeglBuffer) buffer_output = gegl_buffer_new (&bbox, format_output);
+
+ const gint it_output_handle = gegl_buffer_iterator_add (it,
+ buffer_output,
+ &bbox,
+ 0,
+ format_output,
+ GEGL_ACCESS_WRITE,
+ abyss_policy);
+
+ if (filters == 9)
+ {
+ }
+ else
+ {
+ const gint offset_bottom_right_x = 3;
+ const gint offset_bottom_right_y = 3;
+ const gint offset_top_left_x = 3;
+ const gint offset_top_left_y = 3;
+
+ while (gegl_buffer_iterator_next (it))
+ {
+ GeglBufferIteratorItem *item_input = &it->items[it_input_handle];
+ GeglBufferIteratorItem *item_output = &it->items[it_output_handle];
+ g_assert_cmpint (item_input->roi.height, ==, item_output->roi.height);
+ g_assert_cmpint (item_input->roi.width, ==, item_output->roi.width);
+ g_assert_cmpint (item_input->roi.x, ==, item_output->roi.x);
+ g_assert_cmpint (item_input->roi.y, ==, item_output->roi.y);
+
+ const GeglRectangle roi = item_input->roi;
+
+ gfloat sum[8];
+
+ for (gint j = 0; j < roi.height; j++)
+ {
+ for (gint i = 0; i < roi.width; i++)
+ {
+ if (i == offset_top_left_x && j >= offset_top_left_y && j < roi.height -
offset_bottom_right_y)
+ i = roi.width - offset_bottom_right_x;
+ }
+ }
+ }
+ }
+
+ ret_val = static_cast<GeglBuffer *> (g_object_ref (buffer_input));
+ return ret_val;
+}
+
+
+static GeglBuffer *
+photos_rawspeed_op_reconstruct_highlights (GeglBuffer *buffer_input,
+ rawspeed::RawImageData *image_data,
+ gfloat processed_maximums[4],
+ gsize components,
+ guint32 filters)
+{
+ GeglBuffer *ret_val = NULL;
+
+ g_return_val_if_fail (filters == 0 || (filters != 0 && components == 1), NULL);
+
+ static_assert(N_PROCESSED_MAXIMUMS == 4, "Value of N_PROCESSED_MAXIMUMS has changed");
+ const gfloat clip = std::fminf (processed_maximums[0],
+ std::fminf (processed_maximums[1], processed_maximums[2]));
+
+ const GeglAbyssPolicy abyss_policy = static_cast<GeglAbyssPolicy> (GEGL_ABYSS_NONE |
GEGL_BUFFER_FILTER_AUTO);
+ const GeglRectangle bbox = *gegl_buffer_get_extent (buffer_input);
+
+ const Babl *format_input = gegl_buffer_get_format (buffer_input);
+ GeglBufferIterator *it = gegl_buffer_iterator_new (buffer_input,
+ &bbox,
+ 0,
+ format_input,
+ GEGL_ACCESS_READ,
+ abyss_policy,
+ 2);
+ const gint it_input_handle = 0;
+
+ const Babl *format_output = photos_rawspeed_get_format (rawspeed::TYPE_FLOAT32, components);
+ g_autoptr (GeglBuffer) buffer_output = gegl_buffer_new (&bbox, format_output);
+
+ const gint it_output_handle = gegl_buffer_iterator_add (it,
+ buffer_output,
+ &bbox,
+ 0,
+ format_output,
+ GEGL_ACCESS_WRITE,
+ abyss_policy);
+
+ if (filters == 0)
+ {
+ while (gegl_buffer_iterator_next (it))
+ {
+ GeglBufferIteratorItem *item_input = &it->items[it_input_handle];
+ GeglBufferIteratorItem *item_output = &it->items[it_output_handle];
+ g_assert_cmpint (item_input->roi.height, ==, item_output->roi.height);
+ g_assert_cmpint (item_input->roi.width, ==, item_output->roi.width);
+ g_assert_cmpint (item_input->roi.x, ==, item_output->roi.x);
+ g_assert_cmpint (item_input->roi.y, ==, item_output->roi.y);
+
+ const GeglRectangle roi = item_input->roi;
+
+ const gfloat *const in = static_cast<gfloat *> (item_input->data);
+ gfloat *const out = static_cast<gfloat *> (item_output->data);
+
+ for (gint j = 0; j < roi.height; j++)
+ {
+ for (gint i = 0; i < roi.width; i++)
+ {
+ for (gsize c = 0; c < components; c++)
+ {
+ const gsize offset = components
+ * (static_cast<gsize> (j) * static_cast<gsize> (roi.width)
+ + static_cast<gsize> (i))
+ + c;
+
+ out[offset] = fminf (clip, in[offset]);
+ }
+ }
+ }
+ }
+
+ for (guint i = 0; i < N_PROCESSED_MAXIMUMS - 1; i++)
+ processed_maximums[i] = clip;
+ }
+ else
+ {
+ while (gegl_buffer_iterator_next (it))
+ {
+ GeglBufferIteratorItem *item_input = &it->items[it_input_handle];
+ GeglBufferIteratorItem *item_output = &it->items[it_output_handle];
+ g_assert_cmpint (item_input->roi.height, ==, item_output->roi.height);
+ g_assert_cmpint (item_input->roi.width, ==, item_output->roi.width);
+ g_assert_cmpint (item_input->roi.x, ==, item_output->roi.x);
+ g_assert_cmpint (item_input->roi.y, ==, item_output->roi.y);
+
+ const GeglRectangle roi = item_input->roi;
+
+ const gfloat *const in = static_cast<gfloat *> (item_input->data);
+ gfloat *const out = static_cast<gfloat *> (item_output->data);
+
+ for (gint j = 0; j < roi.height; j++)
+ {
+ for (gint i = 0; i < roi.width; i++)
+ {
+ const gsize offset = static_cast<gsize> (j) * static_cast<gsize> (roi.width)
+ + static_cast<gsize> (i);
+
+ out[offset] = fminf (clip, in[offset]);
+ }
+ }
+ }
+
+ const gfloat max = std::fmaxf (processed_maximums[0],
+ std::fmaxf (processed_maximums[1], processed_maximums[2]));
+
+ for (guint i = 0; i < N_PROCESSED_MAXIMUMS - 1; i++)
+ processed_maximums[i] = max;
+ }
+
+ ret_val = static_cast<GeglBuffer *> (g_object_ref (buffer_output));
+ return ret_val;
+}
+
+
+GeglBuffer *
+photos_rawspeed_decode_bytes (GBytes *bytes, GError **error)
+{
+ GeglBuffer *ret_val = NULL;
+
+ if (!photos_rawspeed_ensure_metadata (error))
+ return ret_val;
+
+ rawspeed::RawImage image = photos_rawspeed_decode_bytes_to_image (bytes, error);
+ rawspeed::RawImageData *image_data = image.get ();
+ if (!image_data->isAllocated ())
+ return ret_val;
+
+ if (image_data->blackLevelSeparate[0] == -1
+ || image_data->blackLevelSeparate[1] == -1
+ || image_data->blackLevelSeparate[2] == -1
+ || image_data->blackLevelSeparate[3] == -1)
+ {
+ image_data->calculateBlackAreas ();
+ }
+
+ const rawspeed::RawImageType image_type = image_data->getDataType ();
+
+ std::string image_type_str;
+ switch (image_type)
+ {
+ case rawspeed::TYPE_FLOAT32:
+ image_type_str = "float32";
+ break;
+
+ case rawspeed::TYPE_USHORT16:
+ image_type_str = "ushort16";
+ break;
+
+ default:
+ image_type_str = "unknown";
+ break;
+ }
+
+ photos_debug (PHOTOS_DEBUG_GEGL, "Rawspeed: Image data type: %s", image_type_str.c_str());
+
+ if (image_type != rawspeed::TYPE_USHORT16 && image_type != rawspeed::TYPE_FLOAT32)
+ {
+ g_set_error (error, PHOTOS_ERROR, 0, _("Unsupported image type: %d"), image_type);
+ return ret_val;
+ }
+
+ const guint32 bpp = image_data->getBpp ();
+ photos_debug (PHOTOS_DEBUG_GEGL, "Rawspeed: Bytes per pixel: %" G_GUINT32_FORMAT, bpp);
+
+ if (bpp != sizeof (guint16) && bpp != sizeof (gfloat))
+ {
+ g_set_error (error, PHOTOS_ERROR, 0, _("Unsupported number of bytes per pixel: %" G_GUINT16_FORMAT),
bpp);
+ return ret_val;
+ }
+
+ if (image_type == rawspeed::TYPE_USHORT16 && bpp != sizeof (guint16))
+ {
+ g_set_error (error,
+ PHOTOS_ERROR,
+ 0,
+ _("Unexpected number of bytes per pixel (%" G_GUINT16_FORMAT ") for a 16-bit image"),
+ bpp);
+ return ret_val;
+ }
+
+ if (image_type == rawspeed::TYPE_FLOAT32 && bpp != sizeof (gfloat))
+ {
+ g_set_error (error,
+ PHOTOS_ERROR,
+ 0,
+ _("Unexpected number of bytes per pixel (%" G_GUINT16_FORMAT ") for a floating point
image"),
+ bpp);
+ return ret_val;
+ }
+
+ const guint32 cpp = image_data->getCpp ();
+ photos_debug (PHOTOS_DEBUG_GEGL, "Rawspeed: Components per pixel: %" G_GUINT32_FORMAT, cpp);
+
+ if (cpp != 1)
+ {
+ g_set_error (error,
+ PHOTOS_ERROR,
+ 0,
+ _("Unsupported number of components per pixel: %" G_GUINT16_FORMAT),
+ bpp);
+ return ret_val;
+ }
+
+ const rawspeed::iPoint2D dimensions_uncropped = image_data->getUncroppedDim();
+ photos_debug (PHOTOS_DEBUG_GEGL,
+ "Rawspeed: Uncropped size: %d×%d",
+ dimensions_uncropped.x,
+ dimensions_uncropped.y);
+
+ const rawspeed::iPoint2D crop_offset_top_left = image_data->getCropOffset ();
+ photos_debug (PHOTOS_DEBUG_GEGL,
+ "Rawspeed: Crop offset top-left: %d×%d",
+ crop_offset_top_left.x,
+ crop_offset_top_left.y);
+
+ guint32 filters = image_data->cfa.getDcrawFilter ();
+ if (filters != 0 && filters != 9)
+ {
+ filters = rawspeed::ColorFilterArray::shiftDcrawFilter (filters,
+ crop_offset_top_left.x,
+ crop_offset_top_left.y);
+ }
+
+ photos_debug (PHOTOS_DEBUG_GEGL, "Rawspeed: Filters: %" G_GUINT32_FORMAT, filters);
+
+ gfloat processed_maximums[N_PROCESSED_MAXIMUMS] = { 1.0f, 1.0f, 1.0f, 1.0f };
+
+ g_autoptr (GeglBuffer) buffer_original = photos_rawspeed_buffer_new_from_image (image, 1);
+
+ g_autoptr (GeglBuffer) buffer_corrected = photos_rawspeed_op_correct_black_white_point (buffer_original,
+ image_data,
+ processed_maximums,
+ 1,
+ filters);
+
+ g_autoptr (GeglBuffer) buffer_white_balanced = photos_rawspeed_op_apply_white_balance (buffer_corrected,
+ image_data,
+ processed_maximums,
+ 1,
+ filters);
+
+ g_autoptr (GeglBuffer) buffer_reconstructed = photos_rawspeed_op_reconstruct_highlights
(buffer_white_balanced,
+ image_data,
+
processed_maximums,
+ 1,
+ filters);
+
+ g_autoptr (GeglBuffer) buffer_demosaiced = photos_rawspeed_op_demosaic (buffer_reconstructed,
+ image_data,
+ processed_maximums,
+ 1,
+ filters);
+
+ ret_val = static_cast<GeglBuffer *> (g_object_ref (buffer_corrected));
+ return ret_val;
+}
diff --git a/src/photos-rawspeed.h b/src/photos-rawspeed.h
new file mode 100644
index 00000000..7b2bb185
--- /dev/null
+++ b/src/photos-rawspeed.h
@@ -0,0 +1,31 @@
+/*
+ * Photos - access, organize and share your photos on GNOME
+ * Copyright © 2019 Red Hat, Inc.
+ *
+ * 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
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef PHOTOS_RAWSPEED_H
+#define PHOTOS_RAWSPEED_H
+
+#include <gegl.h>
+#include <glib.h>
+
+G_BEGIN_DECLS
+
+GeglBuffer *photos_rawspeed_decode_bytes (GBytes *bytes, GError **error);
+
+G_END_DECLS
+
+#endif /* PHOTOS_RAWSPEED_H */
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