WIP: more

[dcpomatic.git] / src / lib / image.cc

diff --git a/src/lib/image.cc b/src/lib/image.cc
index 03fe494736b92faff551a31860ff75924ecde1e6..c4312cb8e6529ddd197100882e52f9cbc1fef730 100644 (file)
--- a/src/lib/image.cc
+++ b/src/lib/image.cc
@@ -64,6 +64,15 @@ using dcp::Size;
 /** The memory alignment, in bytes, used for each row of an image if aligment is requested */
 #define ALIGNMENT 64
 
+/* U/V black value for 8-bit colour */
+static uint8_t const eight_bit_uv =    (1 << 7) - 1;
+/* U/V black value for 9-bit colour */
+static uint16_t const nine_bit_uv =    (1 << 8) - 1;
+/* U/V black value for 10-bit colour */
+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;
+
 
 int
 Image::vertical_factor (int n) const
@@ -381,8 +390,19 @@ Image::swap_16 (uint16_t v)
 }
 
 void
-Image::make_part_black (int x, int w)
+Image::make_part_black (int const start, int const width)
 {
+       auto y_part = [&]() {
+               int const bpp = bytes_per_pixel(0);
+               int const h = sample_size(0).height;
+               int const s = stride()[0];
+               auto p = data()[0];
+               for (int y = 0; y < h; ++y) {
+                       memset (p + start * bpp, 0, width * bpp);
+                       p += s;
+               }
+       };
+
        switch (_pixel_format) {
        case AV_PIX_FMT_RGB24:
        case AV_PIX_FMT_ARGB:
@@ -399,12 +419,41 @@ Image::make_part_black (int x, int w)
                int const s = stride()[0];
                uint8_t* p = data()[0];
                for (int y = 0; y < h; y++) {
-                       memset (p + x * bpp, 0, w * bpp);
+                       memset (p + start * bpp, 0, width * bpp);
                        p += s;
                }
                break;
        }
-
+       case AV_PIX_FMT_YUV420P:
+       {
+               y_part ();
+               for (int i = 1; i < 3; ++i) {
+                       auto p = data()[i];
+                       int const h = sample_size(i).height;
+                       for (int y = 0; y < h; ++y) {
+                               for (int x = start / 2; x < (start + width) / 2; ++x) {
+                                       p[x] = eight_bit_uv;
+                               }
+                               p += stride()[i];
+                       }
+               }
+               break;
+       }
+       case AV_PIX_FMT_YUV422P10LE:
+       {
+               y_part ();
+               for (int i = 1; i < 3; ++i) {
+                       auto p = reinterpret_cast<int16_t*>(data()[i]);
+                       int const h = sample_size(i).height;
+                       for (int y = 0; y < h; ++y) {
+                               for (int x = start / 2; x < (start + width) / 2; ++x) {
+                                       p[x] = ten_bit_uv;
+                               }
+                               p += stride()[i] / 2;
+                       }
+               }
+               break;
+       }
        default:
                throw PixelFormatError ("make_part_black()", _pixel_format);
        }
@@ -413,15 +462,6 @@ Image::make_part_black (int x, int w)
 void
 Image::make_black ()
 {
-       /* U/V black value for 8-bit colour */
-       static uint8_t const eight_bit_uv =     (1 << 7) - 1;
-       /* U/V black value for 9-bit colour */
-       static uint16_t const nine_bit_uv =     (1 << 8) - 1;
-       /* U/V black value for 10-bit colour */
-       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 AV_PIX_FMT_YUV420P:
        case AV_PIX_FMT_YUV422P: