projects / libav.git / blame
| Commit | Line | Data |
|---|---|---|
| c8af852b JR |
1 | /* |
| 2 | * Copyright (c) 2004 Michael Niedermayer <michaelni@gmx.at> | |
| 3 | * | |
| 4 | * This file is part of Libav. | |
| 5 | * | |
| 6 | * Libav is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU Lesser General Public | |
| 8 | * License as published by the Free Software Foundation; either | |
| 9 | * version 2.1 of the License, or (at your option) any later version. | |
| 10 | * | |
| 11 | * Libav is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | * Lesser General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU Lesser General Public | |
| 17 | * License along with Libav; if not, write to the Free Software | |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 19 | */ | |
| 20 | ||
| 21 | #ifndef AVRESAMPLE_RESAMPLE_H | |
| 22 | #define AVRESAMPLE_RESAMPLE_H | |
| 23 | ||
| 24 | #include "avresample.h" | |
| 4d68269d | 25 | #include "internal.h" |
| c8af852b JR |
26 | #include "audio_data.h" |
| 27 | ||
| c8af852b JR |
28 | /** |
| 29 | * Allocate and initialize a ResampleContext. | |
| 30 | * | |
| 31 | * The parameters in the AVAudioResampleContext are used to initialize the | |
| 32 | * ResampleContext. | |
| 33 | * | |
| 34 | * @param avr AVAudioResampleContext | |
| 35 | * @return newly-allocated ResampleContext | |
| 36 | */ | |
| 37 | ResampleContext *ff_audio_resample_init(AVAudioResampleContext *avr); | |
| 38 | ||
| 39 | /** | |
| 40 | * Free a ResampleContext. | |
| 41 | * | |
| 42 | * @param c ResampleContext | |
| 43 | */ | |
| 44 | void ff_audio_resample_free(ResampleContext **c); | |
| 45 | ||
| 46 | /** | |
| 47 | * Resample audio data. | |
| 48 | * | |
| 49 | * Changes the sample rate. | |
| 50 | * | |
| 51 | * @par | |
| 52 | * All samples in the source data may not be consumed depending on the | |
| 53 | * resampling parameters and the size of the output buffer. The unconsumed | |
| 54 | * samples are automatically added to the start of the source in the next call. | |
| 55 | * If the destination data can be reallocated, that may be done in this function | |
| 56 | * in order to fit all available output. If it cannot be reallocated, fewer | |
| 57 | * input samples will be consumed in order to have the output fit in the | |
| 58 | * destination data buffers. | |
| 59 | * | |
| 60 | * @param c ResampleContext | |
| 61 | * @param dst destination audio data | |
| 62 | * @param src source audio data | |
| d2f9f8e0 | 63 | * @return 0 on success, negative AVERROR code on failure |
| c8af852b | 64 | */ |
| 1d86aa8b | 65 | int ff_audio_resample(ResampleContext *c, AudioData *dst, AudioData *src); |
| c8af852b JR |
66 | |
| 67 | #endif /* AVRESAMPLE_RESAMPLE_H */ |