swscale: split chroma buffers into separate U/V planes.

Preparatory step to implement support for sizes > VOFW.

1 files changed, 18 insertions, 9 deletions

diff --git a/libswscale/swscale_internal.h b/libswscale/swscale_internal.h
index 1e52ea2a95..964f710179 100644
--- a/libswscale/swscale_internal.h
+++ b/libswscale/swscale_internal.h
@@ -112,7 +112,8 @@ typedef struct SwsContext {
      */
     //@{
     int16_t **lumPixBuf;          ///< Ring buffer for scaled horizontal luma   plane lines to be fed to the vertical scaler.
-    int16_t **chrPixBuf;          ///< Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
+    int16_t **chrUPixBuf;         ///< Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
+    int16_t **chrVPixBuf;         ///< Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
     int16_t **alpPixBuf;          ///< Ring buffer for scaled horizontal alpha  plane lines to be fed to the vertical scaler.
     int       vLumBufSize;        ///< Number of vertical luma/alpha lines allocated in the ring buffer.
     int       vChrBufSize;        ///< Number of vertical chroma     lines allocated in the ring buffer.
@@ -200,6 +201,7 @@ typedef struct SwsContext {
 #define V_TEMP                "11*8+4*4*256*2+32"
 #define Y_TEMP                "11*8+4*4*256*2+40"
 #define ALP_MMX_FILTER_OFFSET "11*8+4*4*256*2+48"
+#define UV_OFF                "11*8+4*4*256*3+48"
 
     DECLARE_ALIGNED(8, uint64_t, redDither);
     DECLARE_ALIGNED(8, uint64_t, greenDither);
@@ -222,6 +224,7 @@ typedef struct SwsContext {
     DECLARE_ALIGNED(8, uint64_t, v_temp);
     DECLARE_ALIGNED(8, uint64_t, y_temp);
     int32_t  alpMmxFilter[4*MAX_FILTER_SIZE];
+    DECLARE_ALIGNED(8, ptrdiff_t, uv_off); ///< offset (in pixels) between u and v planes
 
 #if HAVE_ALTIVEC
     vector signed short   CY;
@@ -255,36 +258,42 @@ typedef struct SwsContext {
     /* function pointers for swScale() */
     void (*yuv2nv12X  )(struct SwsContext *c,
                         const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
-                        const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,
+                        const int16_t *chrFilter, const int16_t **chrUSrc,
+                        const int16_t **chrVSrc, int chrFilterSize,
                         uint8_t *dest, uint8_t *uDest,
                         int dstW, int chrDstW, int dstFormat);
     void (*yuv2yuv1   )(struct SwsContext *c,
-                        const int16_t *lumSrc, const int16_t *chrSrc, const int16_t *alpSrc,
+                        const int16_t *lumSrc, const int16_t *chrUSrc,
+                        const int16_t *chrVSrc, const int16_t *alpSrc,
                         uint8_t *dest,
                         uint8_t *uDest, uint8_t *vDest, uint8_t *aDest,
                         long dstW, long chrDstW);
     void (*yuv2yuvX   )(struct SwsContext *c,
                         const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
-                        const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,
+                        const int16_t *chrFilter, const int16_t **chrUSrc,
+                        const int16_t **chrVSrc, int chrFilterSize,
                         const int16_t **alpSrc,
                         uint8_t *dest,
                         uint8_t *uDest, uint8_t *vDest, uint8_t *aDest,
                         long dstW, long chrDstW);
     void (*yuv2packed1)(struct SwsContext *c,
                         const uint16_t *buf0,
-                        const uint16_t *uvbuf0, const uint16_t *uvbuf1,
+                        const uint16_t *ubuf0, const uint16_t *ubuf1,
+                        const uint16_t *vbuf0, const uint16_t *vbuf1,
                         const uint16_t *abuf0,
                         uint8_t *dest,
                         int dstW, int uvalpha, int dstFormat, int flags, int y);
     void (*yuv2packed2)(struct SwsContext *c,
                         const uint16_t *buf0, const uint16_t *buf1,
-                        const uint16_t *uvbuf0, const uint16_t *uvbuf1,
+                        const uint16_t *ubuf0, const uint16_t *ubuf1,
+                        const uint16_t *vbuf0, const uint16_t *vbuf1,
                         const uint16_t *abuf0, const uint16_t *abuf1,
                         uint8_t *dest,
                         int dstW, int yalpha, int uvalpha, int y);
     void (*yuv2packedX)(struct SwsContext *c,
                         const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
-                        const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,
+                        const int16_t *chrFilter, const int16_t **chrUSrc,
+                        const int16_t **chrVSrc, int chrFilterSize,
                         const int16_t **alpSrc, uint8_t *dest,
                         long dstW, long dstY);
 
@@ -299,7 +308,7 @@ typedef struct SwsContext {
                          int16_t *dst, long dstWidth,
                          const uint8_t *src, int srcW, int xInc);
     void (*hcscale_fast)(struct SwsContext *c,
-                         int16_t *dst, long dstWidth,
+                         int16_t *dst1, int16_t *dst2, long dstWidth,
                          const uint8_t *src1, const uint8_t *src2,
                          int srcW, int xInc);
 
@@ -308,7 +317,7 @@ typedef struct SwsContext {
                    long filterSize);
 
     void (*lumConvertRange)(uint16_t *dst, int width); ///< Color range conversion function for luma plane if needed.
-    void (*chrConvertRange)(uint16_t *dst, int width); ///< Color range conversion function for chroma planes if needed.
+    void (*chrConvertRange)(uint16_t *dst1, uint16_t *dst2, int width); ///< Color range conversion function for chroma planes if needed.
 
     int lumSrcOffset; ///< Offset given to luma src pointers passed to horizontal input functions.
     int chrSrcOffset; ///< Offset given to chroma src pointers passed to horizontal input functions.