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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * audio conversion |
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| 3 | * Copyright (c) 2006 Michael Niedermayer |
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| 4 | * Copyright (c) 2008 Peter Ross |
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| 5 | * |
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| 6 | * This file is part of FFmpeg. |
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| 7 | * |
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| 8 | * FFmpeg is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU Lesser General Public |
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| 10 | * License as published by the Free Software Foundation; either |
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| 11 | * version 2.1 of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * FFmpeg is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | * Lesser General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU Lesser General Public |
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| 19 | * License along with FFmpeg; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 21 | */ |
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| 22 | |||
| 23 | #ifndef SWR_AUDIOCONVERT_H |
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| 24 | #define SWR_AUDIOCONVERT_H |
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| 25 | |||
| 26 | /** |
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| 27 | * @file |
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| 28 | * Audio format conversion routines |
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| 29 | */ |
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| 30 | |||
| 31 | |||
| 32 | #include "swresample_internal.h" |
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| 33 | #include "libavutil/cpu.h" |
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| 34 | |||
| 35 | |||
| 36 | typedef void (conv_func_type)(uint8_t *po, const uint8_t *pi, int is, int os, uint8_t *end); |
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| 37 | typedef void (simd_func_type)(uint8_t **dst, const uint8_t **src, int len); |
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| 38 | |||
| 39 | typedef struct AudioConvert { |
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| 40 | int channels; |
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| 41 | int in_simd_align_mask; |
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| 42 | int out_simd_align_mask; |
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| 43 | conv_func_type *conv_f; |
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| 44 | simd_func_type *simd_f; |
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| 45 | const int *ch_map; |
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| 46 | uint8_t silence[8]; ///< silence input sample |
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| 47 | }AudioConvert; |
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| 48 | |||
| 49 | /** |
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| 50 | * Create an audio sample format converter context |
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| 51 | * @param out_fmt Output sample format |
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| 52 | * @param in_fmt Input sample format |
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| 53 | * @param channels Number of channels |
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| 54 | * @param flags See AV_CPU_FLAG_xx |
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| 55 | * @param ch_map list of the channels id to pick from the source stream, NULL |
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| 56 | * if all channels must be selected |
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| 57 | * @return NULL on error |
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| 58 | */ |
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| 59 | AudioConvert *swri_audio_convert_alloc(enum AVSampleFormat out_fmt, |
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| 60 | enum AVSampleFormat in_fmt, |
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| 61 | int channels, const int *ch_map, |
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| 62 | int flags); |
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| 63 | |||
| 64 | /** |
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| 65 | * Free audio sample format converter context. |
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| 66 | * and set the pointer to NULL |
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| 67 | */ |
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| 68 | void swri_audio_convert_free(AudioConvert **ctx); |
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| 69 | |||
| 70 | /** |
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| 71 | * Convert between audio sample formats |
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| 72 | * @param[in] out array of output buffers for each channel. set to NULL to ignore processing of the given channel. |
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| 73 | * @param[in] in array of input buffers for each channel |
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| 74 | * @param len length of audio frame size (measured in samples) |
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| 75 | */ |
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| 76 | int swri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, int len); |
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| 77 | |||
| 78 | #endif /* AUDIOCONVERT_H */ |