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78 lines
2.6 KiB
78 lines
2.6 KiB
/* |
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* audio conversion |
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* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> |
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* Copyright (c) 2008 Peter Ross |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 SWRESAMPLE_AUDIOCONVERT_H |
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#define SWRESAMPLE_AUDIOCONVERT_H |
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/** |
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* @file |
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* Audio format conversion routines |
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*/ |
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#include "swresample_internal.h" |
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#include "libavutil/cpu.h" |
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typedef void (conv_func_type)(uint8_t *po, const uint8_t *pi, int is, int os, uint8_t *end); |
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typedef void (simd_func_type)(uint8_t **dst, const uint8_t **src, int len); |
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typedef struct AudioConvert { |
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int channels; |
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int in_simd_align_mask; |
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int out_simd_align_mask; |
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conv_func_type *conv_f; |
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simd_func_type *simd_f; |
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const int *ch_map; |
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uint8_t silence[8]; ///< silence input sample |
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}AudioConvert; |
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/** |
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* Create an audio sample format converter context |
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* @param out_fmt Output sample format |
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* @param in_fmt Input sample format |
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* @param channels Number of channels |
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* @param flags See AV_CPU_FLAG_xx |
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* @param ch_map list of the channels id to pick from the source stream, NULL |
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* if all channels must be selected |
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* @return NULL on error |
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*/ |
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AudioConvert *swri_audio_convert_alloc(enum AVSampleFormat out_fmt, |
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enum AVSampleFormat in_fmt, |
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int channels, const int *ch_map, |
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int flags); |
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/** |
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* Free audio sample format converter context. |
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* and set the pointer to NULL |
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*/ |
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void swri_audio_convert_free(AudioConvert **ctx); |
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/** |
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* Convert between audio sample formats |
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* @param[in] out array of output buffers for each channel. set to NULL to ignore processing of the given channel. |
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* @param[in] in array of input buffers for each channel |
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* @param len length of audio frame size (measured in samples) |
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*/ |
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int swri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, int len); |
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#endif /* SWRESAMPLE_AUDIOCONVERT_H */
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