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| author | Stefan Klug <stefan.klug@ideasonboard.com> | 2024-06-28 12:01:44 +0200 |
|---|---|---|
| committer | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2024-06-29 00:18:30 +0300 |
| commit | 4513db58c0f5a4e94b61bebf633277d1a3efc4eb (patch) | |
| tree | 13de0a91289e1f3c3b3ae3969399d862ae245e6f /src/apps/common/dng_writer.cpp | |
| parent | a47ab2711d75fad11502deacdfd293a3407e9ca6 (diff) | |
apps: common: dng_writer: Add thumbnail scanline function for Raw
Add a thumbnail function for raw formats that are 16bit aligned.
This is needed for the upcoming RAW10 and RAW12 implemntation.
Use the new function for RAW16 as the thumbScanlineRaw_CSI2P produces
incorrect results for that format (it averages over adjacent bytes,
which works for the CSI formats).
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'src/apps/common/dng_writer.cpp')
| -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, |