repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * audio conversion | |
| 3 | * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> | |
| 4 | * Copyright (c) 2008 Peter Ross | |
| 5 | * | |
| 6 | * This file is part of FFmpeg. | |
| 7 | * | |
| 8 | * FFmpeg is free software; you can redistribute it and/or | |
| 9 | * modify it under the terms of the GNU Lesser General Public | |
| 10 | * License as published by the Free Software Foundation; either | |
| 11 | * version 2.1 of the License, or (at your option) any later version. | |
| 12 | * | |
| 13 | * FFmpeg is distributed in the hope that it will be useful, | |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 16 | * Lesser General Public License for more details. | |
| 17 | * | |
| 18 | * You should have received a copy of the GNU Lesser General Public | |
| 19 | * License along with FFmpeg; if not, write to the Free Software | |
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 21 | */ | |
| 22 | ||
| 23 | #ifndef SWR_AUDIOCONVERT_H | |
| 24 | #define SWR_AUDIOCONVERT_H | |
| 25 | ||
| 26 | /** | |
| 27 | * @file | |
| 28 | * Audio format conversion routines | |
| 29 | */ | |
| 30 | ||
| 31 | ||
| 32 | #include "swresample_internal.h" | |
| 33 | #include "libavutil/cpu.h" | |
| 34 | ||
| 35 | ||
| 36 | typedef void (conv_func_type)(uint8_t *po, const uint8_t *pi, int is, int os, uint8_t *end); | |
| 37 | typedef void (simd_func_type)(uint8_t **dst, const uint8_t **src, int len); | |
| 38 | ||
| 39 | typedef struct AudioConvert { | |
| 40 | int channels; | |
| 41 | int in_simd_align_mask; | |
| 42 | int out_simd_align_mask; | |
| 43 | conv_func_type *conv_f; | |
| 44 | simd_func_type *simd_f; | |
| 45 | const int *ch_map; | |
| 46 | uint8_t silence[8]; ///< silence input sample | |
| 47 | }AudioConvert; | |
| 48 | ||
| 49 | /** | |
| 50 | * Create an audio sample format converter context | |
| 51 | * @param out_fmt Output sample format | |
| 52 | * @param in_fmt Input sample format | |
| 53 | * @param channels Number of channels | |
| 54 | * @param flags See AV_CPU_FLAG_xx | |
| 55 | * @param ch_map list of the channels id to pick from the source stream, NULL | |
| 56 | * if all channels must be selected | |
| 57 | * @return NULL on error | |
| 58 | */ | |
| 59 | AudioConvert *swri_audio_convert_alloc(enum AVSampleFormat out_fmt, | |
| 60 | enum AVSampleFormat in_fmt, | |
| 61 | int channels, const int *ch_map, | |
| 62 | int flags); | |
| 63 | ||
| 64 | /** | |
| 65 | * Free audio sample format converter context. | |
| 66 | * and set the pointer to NULL | |
| 67 | */ | |
| 68 | void swri_audio_convert_free(AudioConvert **ctx); | |
| 69 | ||
| 70 | /** | |
| 71 | * Convert between audio sample formats | |
| 72 | * @param[in] out array of output buffers for each channel. set to NULL to ignore processing of the given channel. | |
| 73 | * @param[in] in array of input buffers for each channel | |
| 74 | * @param len length of audio frame size (measured in samples) | |
| 75 | */ | |
| 76 | int swri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, int len); | |
| 77 | ||
| 78 | #endif /* AUDIOCONVERT_H */ |