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82 lines
3.0 KiB
C
82 lines
3.0 KiB
C
/*
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* Copyright (C) 2011 Michael Niedermayer (michaelni@gmx.at)
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*
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* This file is part of libswresample
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*
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* libswresample is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* libswresample is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with libswresample; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef SWR_INTERNAL_H
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#define SWR_INTERNAL_H
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#include "swresample.h"
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typedef struct AudioData{
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uint8_t *ch[SWR_CH_MAX];
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uint8_t *data;
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int ch_count;
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int bps;
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int count;
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int planar;
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} AudioData;
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typedef struct SwrContext { //FIXME find unused fields
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const AVClass *av_class;
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int log_level_offset;
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void *log_ctx;
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enum AVSampleFormat in_sample_fmt;
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enum AVSampleFormat int_sample_fmt; ///<AV_SAMPLE_FMT_FLT OR AV_SAMPLE_FMT_S16
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enum AVSampleFormat out_sample_fmt;
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int64_t in_ch_layout;
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int64_t out_ch_layout;
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int in_sample_rate;
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int out_sample_rate;
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int flags;
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float slev, clev, rematrix_volume;
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const int *channel_map; ///< channel index (or -1 if muted channel) map
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int used_ch_count; ///< number of used channels (mapped channel count if channel_map, otherwise in.ch_count)
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//below are private
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int int_bps;
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int resample_first;
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int rematrix; ///< flag to indicate if rematrixing is used
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AudioData in, postin, midbuf, preout, out, in_buffer;
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int in_buffer_index;
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int in_buffer_count;
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int resample_in_constraint;
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struct AVAudioConvert *in_convert;
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struct AVAudioConvert *out_convert;
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struct AVAudioConvert *full_convert;
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struct AVResampleContext *resample;
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float matrix[SWR_CH_MAX][SWR_CH_MAX];
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int32_t matrix32[SWR_CH_MAX][SWR_CH_MAX];
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uint8_t matrix_ch[SWR_CH_MAX][SWR_CH_MAX+1];
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//TODO callbacks for asm optims
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}SwrContext;
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struct AVResampleContext *swr_resample_init(struct AVResampleContext *, int out_rate, int in_rate, int filter_size, int phase_shift, int linear, double cutoff);
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void swr_resample_free(struct AVResampleContext **c);
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int swr_multiple_resample(struct AVResampleContext *c, AudioData *dst, int dst_size, AudioData *src, int src_size, int *consumed);
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void swr_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
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int swr_resample(struct AVResampleContext *c, short *dst, const short *src, int *consumed, int src_size, int dst_size, int update_ctx);
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int swr_rematrix_init(SwrContext *s);
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int swr_rematrix(SwrContext *s, AudioData *out, AudioData *in, int len, int mustcopy);
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#endif
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