*/
#include "rgb_xyz.h"
-#include "argb_image.h"
#include "xyz_image.h"
-#include "image.h"
#include "colour_matrix.h"
#include "colour_conversion.h"
#include "transfer_function.h"
#define DCI_COEFFICIENT (48.0 / 52.37)
-/** Convert an openjpeg XYZ image to RGBA.
+/** Convert an XYZ image to RGBA.
* @param xyz_image Image in XYZ.
- * @return RGB image.
+ * @param conversion Colour conversion to use.
+ * @param argb Buffer to fill with RGBA data. The format of the data is:
+ *
+ * <pre>
+ * Byte /- 0 -------|- 1 --------|- 2 --------|- 3 --------|- 4 --------|- 5 --------| ...
+ * |(0, 0) Blue|(0, 0)Green |(0, 0) Red |(0, 0) Alpha|(0, 1) Blue |(0, 1) Green| ...
+ * </pre>
+ *
+ * So that the first byte is the blue component of the pixel at x=0, y=0, the second
+ * is the green component, and so on.
+ *
+ * Lines are packed so that the second row directly follows the first.
*/
-shared_ptr<ARGBImage>
+void
dcp::xyz_to_rgba (
boost::shared_ptr<const XYZImage> xyz_image,
- ColourConversion const & conversion
+ ColourConversion const & conversion,
+ uint8_t* argb
)
{
int const max_colour = pow (2, 12) - 1;
int* xyz_y = xyz_image->data (1);
int* xyz_z = xyz_image->data (2);
- shared_ptr<ARGBImage> argb_image (new ARGBImage (xyz_image->size ()));
- uint8_t* argb = argb_image->data ();
-
- double const * lut_in = conversion.in()->lut (16);
- double const * lut_out = conversion.out()->lut (12);
- boost::numeric::ublas::matrix<double> matrix = conversion.matrix ();
+ double const * lut_in = conversion.in()->lut (16, true);
+ double const * lut_out = conversion.out()->lut (12, false);
+ boost::numeric::ublas::matrix<double> const matrix = conversion.xyz_to_rgb ();
- for (int y = 0; y < xyz_image->size().height; ++y) {
+ int const height = xyz_image->size().height;
+ int const width = xyz_image->size().width;
+
+ for (int y = 0; y < height; ++y) {
uint8_t* argb_line = argb;
- for (int x = 0; x < xyz_image->size().width; ++x) {
+ for (int x = 0; x < width; ++x) {
DCP_ASSERT (*xyz_x >= 0 && *xyz_y >= 0 && *xyz_z >= 0 && *xyz_x < 4096 && *xyz_y < 4096 && *xyz_z < 4096);
*argb_line++ = lut_out[int(rint(d.r * max_colour))] * 0xff;
*argb_line++ = 0xff;
}
-
- argb += argb_image->stride ();
- }
- return argb_image;
+ /* 4 bytes per pixel */
+ argb += width * 4;
+ }
}
-/** Convert an openjpeg XYZ image to RGB.
+/** Convert an XYZ image to 48bpp RGB.
* @param xyz_image Frame in XYZ.
* @param conversion Colour conversion to use.
- * @param rgb Image to write RGB data to; must have space to be
- * filled with packed RGB 16:16:16, 48bpp, 16R, 16G, 16B,
- * with the 2-byte value for each R/G/B component stored as
- * little-endian; i.e. AV_PIX_FMT_RGB48LE.
+ * @param rgb Buffer to fill with RGB data. Format is packed RGB
+ * 16:16:16, 48bpp, 16R, 16G, 16B, with the 2-byte value for each
+ * R/G/B component stored as little-endian; i.e. AV_PIX_FMT_RGB48LE.
+ * @param stride Stride for RGB data in bytes.
+ * @param note Optional handler for any notes that may be made during the conversion (e.g. when clamping occurs).
*/
void
dcp::xyz_to_rgb (
shared_ptr<const XYZImage> xyz_image,
ColourConversion const & conversion,
- shared_ptr<Image> rgb,
+ uint8_t* rgb,
+ int stride,
optional<NoteHandler> note
)
{
int* xyz_y = xyz_image->data (1);
int* xyz_z = xyz_image->data (2);
- double const * lut_in = conversion.in()->lut (12);
- double const * lut_out = conversion.out()->lut (16);
- boost::numeric::ublas::matrix<double> matrix = conversion.matrix ();
+ double const * lut_in = conversion.in()->lut (12, true);
+ double const * lut_out = conversion.out()->lut (16, false);
+ boost::numeric::ublas::matrix<double> const matrix = conversion.xyz_to_rgb ();
for (int y = 0; y < xyz_image->size().height; ++y) {
- uint16_t* rgb_line = reinterpret_cast<uint16_t*> (rgb->data()[0] + y * rgb->stride()[0]);
+ uint16_t* rgb_line = reinterpret_cast<uint16_t*> (rgb + y * stride);
for (int x = 0; x < xyz_image->size().width; ++x) {
int cx = *xyz_x++;
}
}
-/** rgb must be packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, with the 2-byte value for each R/G/B component stored as little-endian;
- * i.e. AV_PIX_FMT_RGB48LE.
+/** @param rgb RGB data; packed RGB 16:16:16, 48bpp, 16R, 16G, 16B,
+ * with the 2-byte value for each R/G/B component stored as
+ * little-endian; i.e. AV_PIX_FMT_RGB48LE.
+ * @param size of RGB image in pixels.
+ * @param stride of RGB data in bytes.
*/
shared_ptr<dcp::XYZImage>
dcp::rgb_to_xyz (
- boost::shared_ptr<const Image> rgb,
+ uint8_t const * rgb,
+ dcp::Size size,
+ int stride,
ColourConversion const & conversion
)
{
- shared_ptr<XYZImage> xyz (new XYZImage (rgb->size ()));
+ shared_ptr<XYZImage> xyz (new XYZImage (size));
struct {
double r, g, b;
double x, y, z;
} d;
- double const * lut_in = conversion.in()->lut (12);
- double const * lut_out = conversion.out()->lut (16);
- boost::numeric::ublas::matrix<double> matrix = conversion.matrix ();
+ struct {
+ double x, y, z;
+ } e;
+
+ double const * lut_in = conversion.in()->lut (12, false);
+ double const * lut_out = conversion.out()->lut (16, true);
+ boost::numeric::ublas::matrix<double> const rgb_to_xyz = conversion.rgb_to_xyz ();
+ boost::numeric::ublas::matrix<double> const bradford = conversion.bradford ();
int jn = 0;
- for (int y = 0; y < rgb->size().height; ++y) {
- uint16_t* p = reinterpret_cast<uint16_t*> (rgb->data()[0] + y * rgb->stride()[0]);
- for (int x = 0; x < rgb->size().width; ++x) {
+ for (int y = 0; y < size.height; ++y) {
+ uint16_t const * p = reinterpret_cast<uint16_t const *> (rgb + y * stride);
+ for (int x = 0; x < size.width; ++x) {
/* In gamma LUT (converting 16-bit to 12-bit) */
s.r = lut_in[*p++ >> 4];
s.b = lut_in[*p++ >> 4];
/* RGB to XYZ Matrix */
- d.x = ((s.r * matrix(0, 0)) + (s.g * matrix(0, 1)) + (s.b * matrix(0, 2)));
- d.y = ((s.r * matrix(1, 0)) + (s.g * matrix(1, 1)) + (s.b * matrix(1, 2)));
- d.z = ((s.r * matrix(2, 0)) + (s.g * matrix(2, 1)) + (s.b * matrix(2, 2)));
+ d.x = ((s.r * rgb_to_xyz(0, 0)) + (s.g * rgb_to_xyz(0, 1)) + (s.b * rgb_to_xyz(0, 2)));
+ d.y = ((s.r * rgb_to_xyz(1, 0)) + (s.g * rgb_to_xyz(1, 1)) + (s.b * rgb_to_xyz(1, 2)));
+ d.z = ((s.r * rgb_to_xyz(2, 0)) + (s.g * rgb_to_xyz(2, 1)) + (s.b * rgb_to_xyz(2, 2)));
+
+ e.x = ((d.x * bradford(0, 0)) + (d.y * bradford(0, 1)) + (d.z * bradford(0, 2)));
+ e.y = ((d.x * bradford(1, 0)) + (d.y * bradford(1, 1)) + (d.z * bradford(1, 2)));
+ e.z = ((d.x * bradford(2, 0)) + (d.y * bradford(2, 1)) + (d.z * bradford(2, 2)));
/* DCI companding */
- d.x = d.x * DCI_COEFFICIENT * 65535;
- d.y = d.y * DCI_COEFFICIENT * 65535;
- d.z = d.z * DCI_COEFFICIENT * 65535;
+ e.x = e.x * DCI_COEFFICIENT * 65535;
+ e.y = e.y * DCI_COEFFICIENT * 65535;
+ e.z = e.z * DCI_COEFFICIENT * 65535;
- DCP_ASSERT (d.x >= 0 && d.x < 65536);
- DCP_ASSERT (d.y >= 0 && d.y < 65536);
- DCP_ASSERT (d.z >= 0 && d.z < 65536);
+ DCP_ASSERT (e.x >= 0 && e.x < 65536);
+ DCP_ASSERT (e.y >= 0 && e.y < 65536);
+ DCP_ASSERT (e.z >= 0 && e.z < 65536);
/* Out gamma LUT */
- xyz->data(0)[jn] = lut_out[int(rint(d.x))] * 4095;
- xyz->data(1)[jn] = lut_out[int(rint(d.y))] * 4095;
- xyz->data(2)[jn] = lut_out[int(rint(d.z))] * 4095;
+ xyz->data(0)[jn] = lut_out[int(rint(e.x))] * 4095;
+ xyz->data(1)[jn] = lut_out[int(rint(e.y))] * 4095;
+ xyz->data(2)[jn] = lut_out[int(rint(e.z))] * 4095;
++jn;
}
}
-/** Image must be packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, with the 2-byte value for each R/G/B component stored as little-endian;
- * i.e. AV_PIX_FMT_RGB48LE.
+/** @param xyz_16 XYZ image data in packed 16:16:16, 48bpp, 16X, 16Y,
+ * 16Z, with the 2-byte value for each X/Y/Z component stored as
+ * little-endian.
*/
shared_ptr<dcp::XYZImage>
-dcp::xyz_to_xyz (shared_ptr<const Image> xyz_16)
+dcp::xyz_to_xyz (uint8_t const * xyz_16, dcp::Size size, int stride)
{
- shared_ptr<XYZImage> xyz_12 (new XYZImage (xyz_16->size ()));
+ shared_ptr<XYZImage> xyz_12 (new XYZImage (size));
int jn = 0;
- for (int y = 0; y < xyz_16->size().height; ++y) {
- uint16_t* p = reinterpret_cast<uint16_t*> (xyz_16->data()[0] + y * xyz_16->stride()[0]);
- for (int x = 0; x < xyz_16->size().width; ++x) {
+ for (int y = 0; y < size.height; ++y) {
+ uint16_t const * p = reinterpret_cast<uint16_t const *> (xyz_16 + y * stride);
+ for (int x = 0; x < size.width; ++x) {
/* Truncate 16-bit to 12-bit */
xyz_12->data(0)[jn] = *p++ >> 4;
xyz_12->data(1)[jn] = *p++ >> 4;
projects / libdcp.git / blobdiff