2 * Copyright (c) 2004 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of Libav.
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.
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.
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
21 #ifndef AVRESAMPLE_RESAMPLE_H
22 #define AVRESAMPLE_RESAMPLE_H
24 #include "avresample.h"
25 #include "audio_data.h"
27 typedef struct ResampleContext ResampleContext;
30 * Allocate and initialize a ResampleContext.
32 * The parameters in the AVAudioResampleContext are used to initialize the
35 * @param avr AVAudioResampleContext
36 * @return newly-allocated ResampleContext
38 ResampleContext *ff_audio_resample_init(AVAudioResampleContext *avr);
41 * Free a ResampleContext.
43 * @param c ResampleContext
45 void ff_audio_resample_free(ResampleContext **c);
48 * Resample audio data.
50 * Changes the sample rate.
53 * All samples in the source data may not be consumed depending on the
54 * resampling parameters and the size of the output buffer. The unconsumed
55 * samples are automatically added to the start of the source in the next call.
56 * If the destination data can be reallocated, that may be done in this function
57 * in order to fit all available output. If it cannot be reallocated, fewer
58 * input samples will be consumed in order to have the output fit in the
59 * destination data buffers.
61 * @param c ResampleContext
62 * @param dst destination audio data
63 * @param src source audio data
64 * @param consumed number of samples consumed from the source
65 * @return number of samples written to the destination
67 int ff_audio_resample(ResampleContext *c, AudioData *dst, AudioData *src,
70 #endif /* AVRESAMPLE_RESAMPLE_H */