3 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
4 * Copyright (c) 2008 Peter Ross
6 * This file is part of FFmpeg.
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.
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.
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
23 #ifndef SWR_AUDIOCONVERT_H
24 #define SWR_AUDIOCONVERT_H
28 * Audio format conversion routines
32 #include "swresample_internal.h"
33 #include "libavutil/cpu.h"
34 #include "libavutil/audioconvert.h"
37 typedef void (conv_func_type)(uint8_t *po, const uint8_t *pi, int is, int os, uint8_t *end);
39 typedef struct AudioConvert {
41 conv_func_type *conv_f;
43 uint8_t silence[8]; ///< silence input sample
47 * Create an audio sample format converter context
48 * @param out_fmt Output sample format
49 * @param in_fmt Input sample format
50 * @param channels Number of channels
51 * @param flags See AV_CPU_FLAG_xx
52 * @param ch_map list of the channels id to pick from the source stream, NULL
53 * if all channels must be selected
54 * @return NULL on error
56 AudioConvert *swri_audio_convert_alloc(enum AVSampleFormat out_fmt,
57 enum AVSampleFormat in_fmt,
58 int channels, const int *ch_map,
62 * Free audio sample format converter context.
63 * and set the pointer to NULL
65 void swri_audio_convert_free(AudioConvert **ctx);
68 * Convert between audio sample formats
69 * @param[in] out array of output buffers for each channel. set to NULL to ignore processing of the given channel.
70 * @param[in] in array of input buffers for each channel
71 * @param len length of audio frame size (measured in samples)
73 int swri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, int len);
75 #endif /* AUDIOCONVERT_H */