Remove avifPrepareReformatState() from public API
Remove the avifReformatMode enum, the avifReformatState struct, and the
avifPrepareReformatState() function from the public API. They are only
used in src/reformat.c.
Define avifReformatMode and avifReformatState in include/avif/internal.h
so that these two types can be used by src/reformat_libyuv.c in the
future. Mark the avifPrepareReformatState() function as static in
src/reformat.c.
Fix https://github.com/AOMediaCodec/libavif/issues/514.
diff --git a/include/avif/internal.h b/include/avif/internal.h
index a45a2dd..380081a 100644
--- a/include/avif/internal.h
+++ b/include/avif/internal.h
@@ -92,6 +92,48 @@
avifBool avifFillAlpha(const avifAlphaParams * const params);
avifBool avifReformatAlpha(const avifAlphaParams * const params);
+typedef enum avifReformatMode
+{
+ AVIF_REFORMAT_MODE_YUV_COEFFICIENTS = 0, // Normal YUV conversion using coefficients
+ AVIF_REFORMAT_MODE_IDENTITY, // Pack GBR directly into YUV planes (AVIF_MATRIX_COEFFICIENTS_IDENTITY)
+ AVIF_REFORMAT_MODE_YCGCO // YUV conversion using AVIF_MATRIX_COEFFICIENTS_YCGCO
+} avifReformatMode;
+
+typedef struct avifReformatState
+{
+ // YUV coefficients
+ float kr;
+ float kg;
+ float kb;
+
+ uint32_t yuvChannelBytes;
+ uint32_t rgbChannelBytes;
+ uint32_t rgbChannelCount;
+ uint32_t rgbPixelBytes;
+ uint32_t rgbOffsetBytesR;
+ uint32_t rgbOffsetBytesG;
+ uint32_t rgbOffsetBytesB;
+ uint32_t rgbOffsetBytesA;
+
+ uint32_t yuvDepth;
+ avifRange yuvRange;
+ int yuvMaxChannel;
+ int rgbMaxChannel;
+ float rgbMaxChannelF;
+ float biasY; // minimum Y value
+ float biasUV; // the value of 0.5 for the appropriate bit depth [128, 512, 2048]
+ float rangeY; // difference between max and min Y
+ float rangeUV; // difference between max and min UV
+
+ avifPixelFormatInfo formatInfo;
+
+ // LUTs for going from YUV limited/full unorm -> full range RGB FP32
+ float unormFloatTableY[1 << 12];
+ float unormFloatTableUV[1 << 12];
+
+ avifReformatMode mode;
+} avifReformatState;
+
// Returns:
// * AVIF_RESULT_OK - Converted successfully with libyuv
// * AVIF_RESULT_NOT_IMPLEMENTED - The fast path for this combination is not implemented with libyuv, use built-in YUV conversion
