diff options
Diffstat (limited to 'src/libmpeg2new/libmpeg2/idct.c')
| -rw-r--r-- | src/libmpeg2new/libmpeg2/idct.c | 53 |
1 files changed, 23 insertions, 30 deletions
diff --git a/src/libmpeg2new/libmpeg2/idct.c b/src/libmpeg2new/libmpeg2/idct.c index 57aba175b..8b982bb33 100644 --- a/src/libmpeg2new/libmpeg2/idct.c +++ b/src/libmpeg2new/libmpeg2/idct.c @@ -27,8 +27,8 @@ #include <inttypes.h> #include "../include/mpeg2.h" -#include "mpeg2_internal.h" #include "../include/attributes.h" +#include "mpeg2_internal.h" #define W1 2841 /* 2048 * sqrt (2) * cos (1 * pi / 16) */ #define W2 2676 /* 2048 * sqrt (2) * cos (2 * pi / 16) */ @@ -75,7 +75,7 @@ static void inline idct_row (int16_t * const block) /* shortcut */ if (likely (!(block[1] | ((int32_t *)block)[1] | ((int32_t *)block)[2] | ((int32_t *)block)[3]))) { - uint32_t tmp = (uint16_t) (block[0] << 3); + uint32_t tmp = (uint16_t) (block[0] >> 1); tmp |= tmp << 16; ((int32_t *)block)[0] = tmp; ((int32_t *)block)[1] = tmp; @@ -84,7 +84,7 @@ static void inline idct_row (int16_t * const block) return; } - d0 = (block[0] << 11) + 128; + d0 = (block[0] << 11) + 2048; d1 = block[1]; d2 = block[2] << 11; d3 = block[3]; @@ -106,17 +106,17 @@ static void inline idct_row (int16_t * const block) b3 = t1 + t3; t0 -= t2; t1 -= t3; - b1 = ((t0 + t1) * 181) >> 8; - b2 = ((t0 - t1) * 181) >> 8; + b1 = ((t0 + t1) >> 8) * 181; + b2 = ((t0 - t1) >> 8) * 181; - block[0] = (a0 + b0) >> 8; - block[1] = (a1 + b1) >> 8; - block[2] = (a2 + b2) >> 8; - block[3] = (a3 + b3) >> 8; - block[4] = (a3 - b3) >> 8; - block[5] = (a2 - b2) >> 8; - block[6] = (a1 - b1) >> 8; - block[7] = (a0 - b0) >> 8; + block[0] = (a0 + b0) >> 12; + block[1] = (a1 + b1) >> 12; + block[2] = (a2 + b2) >> 12; + block[3] = (a3 + b3) >> 12; + block[4] = (a3 - b3) >> 12; + block[5] = (a2 - b2) >> 12; + block[6] = (a1 - b1) >> 12; + block[7] = (a0 - b0) >> 12; } static void inline idct_col (int16_t * const block) @@ -145,10 +145,10 @@ static void inline idct_col (int16_t * const block) BUTTERFLY (t2, t3, W3, W5, d1, d2); b0 = t0 + t2; b3 = t1 + t3; - t0 = (t0 - t2) >> 8; - t1 = (t1 - t3) >> 8; - b1 = (t0 + t1) * 181; - b2 = (t0 - t1) * 181; + t0 -= t2; + t1 -= t3; + b1 = ((t0 + t1) >> 8) * 181; + b2 = ((t0 - t1) >> 8) * 181; block[8*0] = (a0 + b0) >> 17; block[8*1] = (a1 + b1) >> 17; @@ -179,8 +179,8 @@ static void mpeg2_idct_copy_c (int16_t * block, uint8_t * dest, dest[6] = CLIP (block[6]); dest[7] = CLIP (block[7]); - block[0] = 0; block[1] = 0; block[2] = 0; block[3] = 0; - block[4] = 0; block[5] = 0; block[6] = 0; block[7] = 0; + ((int32_t *)block)[0] = 0; ((int32_t *)block)[1] = 0; + ((int32_t *)block)[2] = 0; ((int32_t *)block)[3] = 0; dest += stride; block += 8; @@ -192,7 +192,7 @@ static void mpeg2_idct_add_c (const int last, int16_t * block, { int i; - if (last != 129 || (block[0] & 7) == 4) { + if (last != 129 || (block[0] & (7 << 4)) == (4 << 4)) { for (i = 0; i < 8; i++) idct_row (block + 8 * i); for (i = 0; i < 8; i++) @@ -207,8 +207,8 @@ static void mpeg2_idct_add_c (const int last, int16_t * block, dest[6] = CLIP (block[6] + dest[6]); dest[7] = CLIP (block[7] + dest[7]); - block[0] = 0; block[1] = 0; block[2] = 0; block[3] = 0; - block[4] = 0; block[5] = 0; block[6] = 0; block[7] = 0; + ((int32_t *)block)[0] = 0; ((int32_t *)block)[1] = 0; + ((int32_t *)block)[2] = 0; ((int32_t *)block)[3] = 0; dest += stride; block += 8; @@ -216,7 +216,7 @@ static void mpeg2_idct_add_c (const int last, int16_t * block, } else { int DC; - DC = (block[0] + 4) >> 3; + DC = (block[0] + 64) >> 7; block[0] = block[63] = 0; i = 8; do { @@ -268,13 +268,6 @@ void mpeg2_idct_init (uint32_t accel) CLIP(i) = (i < 0) ? 0 : ((i > 255) ? 255 : i); } else #endif -#ifdef LIBMPEG2_MLIB - if (accel & MPEG2_ACCEL_MLIB) { - mpeg2_idct_copy = mpeg2_idct_copy_mlib_non_ieee; - mpeg2_idct_add = (getenv ("MLIB_NON_IEEE") ? - mpeg2_idct_add_mlib_non_ieee : mpeg2_idct_add_mlib); - } else -#endif { extern uint8_t mpeg2_scan_norm[64]; extern uint8_t mpeg2_scan_alt[64]; |