diff options
| -rw-r--r-- | src/apps/common/dng_writer.cpp | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/src/apps/common/dng_writer.cpp b/src/apps/common/dng_writer.cpp index 3b17dadc..96bbd26b 100644 --- a/src/apps/common/dng_writer.cpp +++ b/src/apps/common/dng_writer.cpp @@ -144,6 +144,29 @@ void packScanlineRaw16(void *output, const void *input, unsigned int width) std::copy(in, in + width, out); } +/* Thumbnail function for raw data with each pixel aligned to 16bit. */ +void thumbScanlineRaw(const FormatInfo &info, void *output, const void *input, + unsigned int width, unsigned int stride) +{ + const uint16_t *in = static_cast<const uint16_t *>(input); + const uint16_t *in2 = static_cast<const uint16_t *>(input) + stride / 2; + uint8_t *out = static_cast<uint8_t *>(output); + + /* Shift down to 8. */ + unsigned int shift = info.bitsPerSample - 8; + + /* Simple averaging that produces greyscale RGB values. */ + for (unsigned int x = 0; x < width; x++) { + uint16_t value = (in[0] + in[1] + in2[0] + in2[1]) >> 2; + value = value >> shift; + *out++ = value; + *out++ = value; + *out++ = value; + in += 16; + in2 += 16; + } +} + void packScanlineRaw10_CSI2P(void *output, const void *input, unsigned int width) { const uint8_t *in = static_cast<const uint8_t *>(input); @@ -321,25 +344,25 @@ const std::map<PixelFormat, FormatInfo> formatInfo = { .bitsPerSample = 16, .pattern = { CFAPatternBlue, CFAPatternGreen, CFAPatternGreen, CFAPatternRed }, .packScanline = packScanlineRaw16, - .thumbScanline = thumbScanlineRaw_CSI2P, + .thumbScanline = thumbScanlineRaw, } }, { formats::SGBRG16, { .bitsPerSample = 16, .pattern = { CFAPatternGreen, CFAPatternBlue, CFAPatternRed, CFAPatternGreen }, .packScanline = packScanlineRaw16, - .thumbScanline = thumbScanlineRaw_CSI2P, + .thumbScanline = thumbScanlineRaw, } }, { formats::SGRBG16, { .bitsPerSample = 16, .pattern = { CFAPatternGreen, CFAPatternRed, CFAPatternBlue, CFAPatternGreen }, .packScanline = packScanlineRaw16, - .thumbScanline = thumbScanlineRaw_CSI2P, + .thumbScanline = thumbScanlineRaw, } }, { formats::SRGGB16, { .bitsPerSample = 16, .pattern = { CFAPatternRed, CFAPatternGreen, CFAPatternGreen, CFAPatternBlue }, .packScanline = packScanlineRaw16, - .thumbScanline = thumbScanlineRaw_CSI2P, + .thumbScanline = thumbScanlineRaw, } }, { formats::SBGGR10_CSI2P, { .bitsPerSample = 10, |