/*
* 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 "fft.h"
#include "synth_filter.h"
-void ff_synth_filter_float(FFTContext *imdct,
- float *synth_buf_ptr, int *synth_buf_offset,
- float synth_buf2[32], const float window[512],
- float out[32], const float in[32], float scale, float bias)
+static void synth_filter_float(FFTContext *imdct,
+ float *synth_buf_ptr, int *synth_buf_offset,
+ float synth_buf2[32], const float window[512],
+ float out[32], const float in[32], float scale)
{
float *synth_buf= synth_buf_ptr + *synth_buf_offset;
int i, j;
- ff_imdct_half(imdct, synth_buf, in);
+ imdct->imdct_half(imdct, synth_buf, in);
for (i = 0; i < 16; i++){
- float a= synth_buf2[i ];
- float b= synth_buf2[i+16];
+ float a= synth_buf2[i ];
+ float b= synth_buf2[i + 16];
float c= 0;
float d= 0;
for (j = 0; j < 512 - *synth_buf_offset; j += 64){
- a += window[i+j ]*(-synth_buf[15-i+j]);
- b += window[i+j+16]*( synth_buf[ i+j]);
- c += window[i+j+32]*( synth_buf[16+i+j]);
- d += window[i+j+48]*( synth_buf[31-i+j]);
+ a += window[i + j ]*(-synth_buf[15 - i + j ]);
+ b += window[i + j + 16]*( synth_buf[ i + j ]);
+ c += window[i + j + 32]*( synth_buf[16 + i + j ]);
+ d += window[i + j + 48]*( synth_buf[31 - i + j ]);
}
for ( ; j < 512; j += 64){
- a += window[i+j ]*(-synth_buf[15-i+j-512]);
- b += window[i+j+16]*( synth_buf[ i+j-512]);
- c += window[i+j+32]*( synth_buf[16+i+j-512]);
- d += window[i+j+48]*( synth_buf[31-i+j-512]);
+ a += window[i + j ]*(-synth_buf[15 - i + j - 512]);
+ b += window[i + j + 16]*( synth_buf[ i + j - 512]);
+ c += window[i + j + 32]*( synth_buf[16 + i + j - 512]);
+ d += window[i + j + 48]*( synth_buf[31 - i + j - 512]);
}
- out[i ] = a * scale + bias;
- out[i+16] = b * scale + bias;
- synth_buf2[i ] = c;
- synth_buf2[i+16] = d;
+ out[i ] = a*scale;
+ out[i + 16] = b*scale;
+ synth_buf2[i ] = c;
+ synth_buf2[i + 16] = d;
}
- *synth_buf_offset= (*synth_buf_offset-32)&511;
+ *synth_buf_offset= (*synth_buf_offset - 32)&511;
+}
+
+av_cold void ff_synth_filter_init(SynthFilterContext *c)
+{
+ c->synth_filter_float = synth_filter_float;
+
+ if (ARCH_ARM) ff_synth_filter_init_arm(c);
}