mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-12 19:18:44 +02:00
134dba9544
xHE-AAC relies on the same postfilter mechanism that Opus uses to improve clarity (albeit with a steeper deemphasis filter). The code to apply it is identical, it's still just a simple IIR low-pass filter. This commit makes it possible to use alternative constants.
34 lines
1.2 KiB
C
34 lines
1.2 KiB
C
/*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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,
|
|
* 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
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef AVCODEC_OPUSDSP_H
|
|
#define AVCODEC_OPUSDSP_H
|
|
|
|
typedef struct OpusDSP {
|
|
void (*postfilter)(float *data, int period, float *gains, int len);
|
|
float (*deemphasis)(float *out, float *in, float coeff, const float *weights, int len);
|
|
} OpusDSP;
|
|
|
|
void ff_opus_dsp_init(OpusDSP *ctx);
|
|
|
|
void ff_opus_dsp_init_x86(OpusDSP *ctx);
|
|
void ff_opus_dsp_init_aarch64(OpusDSP *ctx);
|
|
void ff_opus_dsp_init_riscv(OpusDSP *ctx);
|
|
|
|
#endif /* AVCODEC_OPUSDSP_H */
|