mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
86 lines
4.6 KiB
86 lines
4.6 KiB
/* |
|
* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com> |
|
* |
|
* This file is part of Libav. |
|
* |
|
* 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. |
|
* |
|
* 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 Libav; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
#ifndef AVRESAMPLE_INTERNAL_H |
|
#define AVRESAMPLE_INTERNAL_H |
|
|
|
#include "libavutil/audio_fifo.h" |
|
#include "libavutil/log.h" |
|
#include "libavutil/opt.h" |
|
#include "libavutil/samplefmt.h" |
|
#include "avresample.h" |
|
#include "audio_convert.h" |
|
#include "audio_data.h" |
|
#include "audio_mix.h" |
|
#include "resample.h" |
|
|
|
struct AVAudioResampleContext { |
|
const AVClass *av_class; /**< AVClass for logging and AVOptions */ |
|
|
|
uint64_t in_channel_layout; /**< input channel layout */ |
|
enum AVSampleFormat in_sample_fmt; /**< input sample format */ |
|
int in_sample_rate; /**< input sample rate */ |
|
uint64_t out_channel_layout; /**< output channel layout */ |
|
enum AVSampleFormat out_sample_fmt; /**< output sample format */ |
|
int out_sample_rate; /**< output sample rate */ |
|
enum AVSampleFormat internal_sample_fmt; /**< internal sample format */ |
|
enum AVMixCoeffType mix_coeff_type; /**< mixing coefficient type */ |
|
double center_mix_level; /**< center mix level */ |
|
double surround_mix_level; /**< surround mix level */ |
|
double lfe_mix_level; /**< lfe mix level */ |
|
int normalize_mix_level; /**< enable mix level normalization */ |
|
int force_resampling; /**< force resampling */ |
|
int filter_size; /**< length of each FIR filter in the resampling filterbank relative to the cutoff frequency */ |
|
int phase_shift; /**< log2 of the number of entries in the resampling polyphase filterbank */ |
|
int linear_interp; /**< if 1 then the resampling FIR filter will be linearly interpolated */ |
|
double cutoff; /**< resampling cutoff frequency. 1.0 corresponds to half the output sample rate */ |
|
enum AVResampleFilterType filter_type; /**< resampling filter type */ |
|
int kaiser_beta; /**< beta value for Kaiser window (only applicable if filter_type == AV_FILTER_TYPE_KAISER) */ |
|
enum AVResampleDitherMethod dither_method; /**< dither method */ |
|
|
|
int in_channels; /**< number of input channels */ |
|
int out_channels; /**< number of output channels */ |
|
int resample_channels; /**< number of channels used for resampling */ |
|
int downmix_needed; /**< downmixing is needed */ |
|
int upmix_needed; /**< upmixing is needed */ |
|
int mixing_needed; /**< either upmixing or downmixing is needed */ |
|
int resample_needed; /**< resampling is needed */ |
|
int in_convert_needed; /**< input sample format conversion is needed */ |
|
int out_convert_needed; /**< output sample format conversion is needed */ |
|
|
|
AudioData *in_buffer; /**< buffer for converted input */ |
|
AudioData *resample_out_buffer; /**< buffer for output from resampler */ |
|
AudioData *out_buffer; /**< buffer for converted output */ |
|
AVAudioFifo *out_fifo; /**< FIFO for output samples */ |
|
|
|
AudioConvert *ac_in; /**< input sample format conversion context */ |
|
AudioConvert *ac_out; /**< output sample format conversion context */ |
|
ResampleContext *resample; /**< resampling context */ |
|
AudioMix *am; /**< channel mixing context */ |
|
enum AVMatrixEncoding matrix_encoding; /**< matrixed stereo encoding */ |
|
|
|
/** |
|
* mix matrix |
|
* only used if avresample_set_matrix() is called before avresample_open() |
|
*/ |
|
double *mix_matrix; |
|
}; |
|
|
|
#endif /* AVRESAMPLE_INTERNAL_H */
|
|
|