resample.h
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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"
25 #include "internal.h"
26 #include "audio_data.h"
27 
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  */
38 
39 /**
40  * Free a ResampleContext.
41  *
42  * @param c ResampleContext
43  */
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
63  * @return 0 on success, negative AVERROR code on failure
64  */
66 
67 #endif /* AVRESAMPLE_RESAMPLE_H */
void ff_audio_resample_free(ResampleContext **c)
Free a ResampleContext.
Audio buffer used for intermediate storage between conversion phases.
Definition: oss_audio.c:46
external API header
ResampleContext * ff_audio_resample_init(AVAudioResampleContext *avr)
Allocate and initialize a ResampleContext.
AVS_Value src
Definition: avisynth_c.h:523
static double c[64]
int ff_audio_resample(ResampleContext *c, AudioData *dst, AudioData *src)
Resample audio data.
else dst[i][x+y *dst_stride[i]]
Definition: vf_mcdeint.c:160