* Floating point AAN IDCT
* Copyright (c) 2008 Michael Niedermayer <michaelni@gmx.at>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include "mpegvideo.h"
+#include "faanidct.h"
+#include "libavutil/common.h"
+/* To allow switching to double. */
#define FLOAT float
#define B0 1.0000000000000000000000
B7*B0/8, B7*B1/8, B7*B2/8, B7*B3/8, B7*B4/8, B7*B5/8, B7*B6/8, B7*B7/8,
};
-static inline void p8idct(DCTELEM data[64], FLOAT temp[64], uint8_t *dest, int stride, int x, int y, int type){
+static inline void p8idct(int16_t data[64], FLOAT temp[64], uint8_t *dest, int stride, int x, int y, int type){
int i;
- FLOAT tmp0, tmp1;
+ FLOAT av_unused tmp0;
FLOAT s04, d04, s17, d17, s26, d26, s53, d53;
FLOAT os07, os16, os25, os34;
FLOAT od07, od16, od25, od34;
s26 = temp[2*x + i] + temp[6*x + i];
d26 = temp[2*x + i] - temp[6*x + i];
- tmp1= d26*(2*A4) - s26;
+ d26*= 2*A4;
+ d26-= s26;
s04= temp[0*x + i] + temp[4*x + i];
d04= temp[0*x + i] - temp[4*x + i];
os07= s04 + s26;
os34= s04 - s26;
- os16= d04 + tmp1;
- os25= d04 - tmp1;
+ os16= d04 + d26;
+ os25= d04 - d26;
if(type==0){
temp[0*x + i]= os07 + od07;
}
}
-void ff_faanidct(DCTELEM block[64]){
+void ff_faanidct(int16_t block[64]){
FLOAT temp[64];
int i;
p8idct(block, temp, NULL, 0, 8, 1, 1);
}
-void ff_faanidct_add(uint8_t *dest, int line_size, DCTELEM block[64]){
+void ff_faanidct_add(uint8_t *dest, int line_size, int16_t block[64]){
FLOAT temp[64];
int i;
p8idct(NULL , temp, dest, line_size, 8, 1, 2);
}
-void ff_faanidct_put(uint8_t *dest, int line_size, DCTELEM block[64]){
+void ff_faanidct_put(uint8_t *dest, int line_size, int16_t block[64]){
FLOAT temp[64];
int i;