diff options
Diffstat (limited to 'src/libffmpeg/libavcodec/simple_idct.c')
| -rw-r--r-- | src/libffmpeg/libavcodec/simple_idct.c | 34 |
1 files changed, 20 insertions, 14 deletions
diff --git a/src/libffmpeg/libavcodec/simple_idct.c b/src/libffmpeg/libavcodec/simple_idct.c index 703e94f21..4b488197a 100644 --- a/src/libffmpeg/libavcodec/simple_idct.c +++ b/src/libffmpeg/libavcodec/simple_idct.c @@ -17,6 +17,12 @@ * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ + +/** + * @file simple_idct.c + * simpleidct in C. + */ + /* based upon some outcommented c code from mpeg2dec (idct_mmx.c written by Aaron Holtzman <aholtzma@ess.engr.uvic.ca>) @@ -172,11 +178,11 @@ static inline void idctRowCondDC (DCTELEM * row) row[4] = (a3 - b3) >> ROW_SHIFT; } -static inline void idctSparseColPut (UINT8 *dest, int line_size, +static inline void idctSparseColPut (uint8_t *dest, int line_size, DCTELEM * col) { int a0, a1, a2, a3, b0, b1, b2, b3; - UINT8 *cm = cropTbl + MAX_NEG_CROP; + uint8_t *cm = cropTbl + MAX_NEG_CROP; /* XXX: I did that only to give same values as previous code */ a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4)); @@ -244,11 +250,11 @@ static inline void idctSparseColPut (UINT8 *dest, int line_size, dest[0] = cm[(a0 - b0) >> COL_SHIFT]; } -static inline void idctSparseColAdd (UINT8 *dest, int line_size, +static inline void idctSparseColAdd (uint8_t *dest, int line_size, DCTELEM * col) { int a0, a1, a2, a3, b0, b1, b2, b3; - UINT8 *cm = cropTbl + MAX_NEG_CROP; + uint8_t *cm = cropTbl + MAX_NEG_CROP; /* XXX: I did that only to give same values as previous code */ a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4)); @@ -379,7 +385,7 @@ static inline void idctSparseCol (DCTELEM * col) col[56] = ((a0 - b0) >> COL_SHIFT); } -void simple_idct_put(UINT8 *dest, int line_size, DCTELEM *block) +void simple_idct_put(uint8_t *dest, int line_size, DCTELEM *block) { int i; for(i=0; i<8; i++) @@ -389,7 +395,7 @@ void simple_idct_put(UINT8 *dest, int line_size, DCTELEM *block) idctSparseColPut(dest + i, line_size, block + i); } -void simple_idct_add(UINT8 *dest, int line_size, DCTELEM *block) +void simple_idct_add(uint8_t *dest, int line_size, DCTELEM *block) { int i; for(i=0; i<8; i++) @@ -420,10 +426,10 @@ void simple_idct(DCTELEM *block) and the butterfly must be multiplied by 0.5 * sqrt(2.0) */ #define C_SHIFT (4+1+12) -static inline void idct4col(UINT8 *dest, int line_size, const DCTELEM *col) +static inline void idct4col(uint8_t *dest, int line_size, const DCTELEM *col) { int c0, c1, c2, c3, a0, a1, a2, a3; - const UINT8 *cm = cropTbl + MAX_NEG_CROP; + const uint8_t *cm = cropTbl + MAX_NEG_CROP; a0 = col[8*0]; a1 = col[8*2]; @@ -457,7 +463,7 @@ static inline void idct4col(UINT8 *dest, int line_size, const DCTELEM *col) /* XXX: I think a 1.0/sqrt(2) normalization should be needed to compensate the extra butterfly stage - I don't have the full DV specification */ -void simple_idct248_put(UINT8 *dest, int line_size, DCTELEM *block) +void simple_idct248_put(uint8_t *dest, int line_size, DCTELEM *block) { int i; DCTELEM *ptr; @@ -500,10 +506,10 @@ void simple_idct248_put(UINT8 *dest, int line_size, DCTELEM *block) #define C2 C_FIX(0.2705980501) #define C3 C_FIX(0.5) #define C_SHIFT (4+1+12) -static inline void idct4col_add(UINT8 *dest, int line_size, const DCTELEM *col) +static inline void idct4col_add(uint8_t *dest, int line_size, const DCTELEM *col) { int c0, c1, c2, c3, a0, a1, a2, a3; - const UINT8 *cm = cropTbl + MAX_NEG_CROP; + const uint8_t *cm = cropTbl + MAX_NEG_CROP; a0 = col[8*0]; a1 = col[8*1]; @@ -531,7 +537,7 @@ static inline void idct4col_add(UINT8 *dest, int line_size, const DCTELEM *col) static inline void idct4row(DCTELEM *row) { int c0, c1, c2, c3, a0, a1, a2, a3; - const UINT8 *cm = cropTbl + MAX_NEG_CROP; + //const uint8_t *cm = cropTbl + MAX_NEG_CROP; a0 = row[0]; a1 = row[1]; @@ -547,7 +553,7 @@ static inline void idct4row(DCTELEM *row) row[3]= (c0 - c1) >> R_SHIFT; } -void simple_idct84_add(UINT8 *dest, int line_size, DCTELEM *block) +void simple_idct84_add(uint8_t *dest, int line_size, DCTELEM *block) { int i; @@ -562,7 +568,7 @@ void simple_idct84_add(UINT8 *dest, int line_size, DCTELEM *block) } } -void simple_idct48_add(UINT8 *dest, int line_size, DCTELEM *block) +void simple_idct48_add(uint8_t *dest, int line_size, DCTELEM *block) { int i; |