swscale: GBRP output support

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

1 files changed, 37 insertions, 1 deletions

diff --git a/libswscale/swscale_internal.h b/libswscale/swscale_internal.h
index 8752672536..f9f023f1cf 100644
--- a/libswscale/swscale_internal.h
+++ b/libswscale/swscale_internal.h
@@ -218,6 +218,40 @@ typedef void (*yuv2packedX_fn)(struct SwsContext *c, const int16_t *lumFilter,
                                const int16_t **alpSrc, uint8_t *dest,
                                int dstW, int y);
 
+/**
+ * Write one line of horizontally scaled Y/U/V/A to YUV/RGB
+ * output by doing multi-point vertical scaling between input pixels.
+ *
+ * @param c             SWS scaling context
+ * @param lumFilter     vertical luma/alpha scaling coefficients, 12bit [0,4096]
+ * @param lumSrc        scaled luma (Y) source data, 15bit for 8-10bit output,
+ *                      19-bit for 16bit output (in int32_t)
+ * @param lumFilterSize number of vertical luma/alpha input lines to scale
+ * @param chrFilter     vertical chroma scaling coefficients, 12bit [0,4096]
+ * @param chrUSrc       scaled chroma (U) source data, 15bit for 8-10bit output,
+ *                      19-bit for 16bit output (in int32_t)
+ * @param chrVSrc       scaled chroma (V) source data, 15bit for 8-10bit output,
+ *                      19-bit for 16bit output (in int32_t)
+ * @param chrFilterSize number of vertical chroma input lines to scale
+ * @param alpSrc        scaled alpha (A) source data, 15bit for 8-10bit output,
+ *                      19-bit for 16bit output (in int32_t)
+ * @param dest          pointer to the output planes. For 16bit output, this is
+ *                      uint16_t
+ * @param dstW          width of lumSrc and alpSrc in pixels, number of pixels
+ *                      to write into dest[]
+ * @param y             vertical line number for this output. This does not need
+ *                      to be used to calculate the offset in the destination,
+ *                      but can be used to generate comfort noise using dithering
+ *                      or some output formats.
+ */
+typedef void (*yuv2anyX_fn)(struct SwsContext *c, const int16_t *lumFilter,
+                            const int16_t **lumSrc, int lumFilterSize,
+                            const int16_t *chrFilter,
+                            const int16_t **chrUSrc,
+                            const int16_t **chrVSrc, int chrFilterSize,
+                            const int16_t **alpSrc, uint8_t **dest,
+                            int dstW, int y);
+
 /* This struct should be aligned on at least a 32-byte boundary. */
 typedef struct SwsContext {
     /**
@@ -427,6 +461,7 @@ typedef struct SwsContext {
     yuv2packed1_fn yuv2packed1;
     yuv2packed2_fn yuv2packed2;
     yuv2packedX_fn yuv2packedX;
+    yuv2anyX_fn yuv2anyX;
 
     /// Unscaled conversion of luma plane to YV12 for horizontal scaler.
     void (*lumToYV12)(uint8_t *dst, const uint8_t *src,
@@ -708,7 +743,8 @@ void ff_sws_init_output_funcs(SwsContext *c,
                               yuv2interleavedX_fn *yuv2nv12cX,
                               yuv2packed1_fn *yuv2packed1,
                               yuv2packed2_fn *yuv2packed2,
-                              yuv2packedX_fn *yuv2packedX);
+                              yuv2packedX_fn *yuv2packedX,
+                              yuv2anyX_fn *yuv2anyX);
 void ff_sws_init_swScale_altivec(SwsContext *c);
 void ff_sws_init_swScale_mmx(SwsContext *c);