mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
dc7e07ac1f
This improves the audio quality significantly for stereo source with both the fixed-point and floating-point AC-3 encoders. Update acodec-ac3_fixed and seek-ac3_rm test references. Originally committed as revision 26271 to svn://svn.ffmpeg.org/ffmpeg/trunk
46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
/*
|
|
* The simplest AC-3 encoder
|
|
* Copyright (c) 2000 Fabrice Bellard
|
|
* Copyright (c) 2006-2010 Justin Ruggles <justin.ruggles@gmail.com>
|
|
* Copyright (c) 2006-2010 Prakash Punnoor <prakash@punnoor.de>
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* floating-point AC-3 encoder header.
|
|
*/
|
|
|
|
#ifndef AVCODEC_AC3ENC_FLOAT_H
|
|
#define AVCODEC_AC3ENC_FLOAT_H
|
|
|
|
#include "fft.h"
|
|
|
|
|
|
typedef float SampleType;
|
|
typedef float CoefType;
|
|
typedef float CoefSumType;
|
|
|
|
|
|
typedef struct AC3MDCTContext {
|
|
const float *window; ///< MDCT window function
|
|
FFTContext fft; ///< FFT context for MDCT calculation
|
|
} AC3MDCTContext;
|
|
|
|
#endif /* AVCODEC_AC3ENC_FLOAT_H */
|