audio_data.h
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1 /*
2  * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
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_AUDIO_DATA_H
22 #define AVRESAMPLE_AUDIO_DATA_H
23 
24 #include <stdint.h>
25 
26 #include "libavutil/audio_fifo.h"
27 #include "libavutil/log.h"
28 #include "libavutil/samplefmt.h"
29 #include "avresample.h"
30 
34 typedef struct AudioData {
35  const AVClass *class;
38  unsigned int buffer_size;
40  int nb_samples;
42  int channels;
44  int is_planar;
45  int planes;
47  int stride;
48  int read_only;
50  int ptr_align;
52  const char *name;
53 } AudioData;
54 
55 int ff_audio_data_set_channels(AudioData *a, int channels);
56 
76 int ff_audio_data_init(AudioData *a, uint8_t **src, int plane_size, int channels,
78  int read_only, const char *name);
79 
91 AudioData *ff_audio_data_alloc(int channels, int nb_samples,
93  const char *name);
94 
105 
114 
122 int ff_audio_data_copy(AudioData *out, AudioData *in);
123 
136 int ff_audio_data_combine(AudioData *dst, int dst_offset, AudioData *src,
137  int src_offset, int nb_samples);
138 
148 
159 int ff_audio_data_add_to_fifo(AVAudioFifo *af, AudioData *a, int offset,
160  int nb_samples);
161 
172 
173 #endif /* AVRESAMPLE_AUDIO_DATA_H */
unsigned int buffer_size
allocated buffer size
Definition: audio_data.h:38
const char * name
name for debug logging
Definition: audio_data.h:52
void ff_audio_data_free(AudioData **a)
Free AudioData.
Definition: audio_data.c:208
Audio buffer used for intermediate storage between conversion phases.
Definition: oss_audio.c:46
int allow_realloc
realloc is allowed
Definition: audio_data.h:49
int ff_audio_data_combine(AudioData *dst, int dst_offset, AudioData *src, int src_offset, int nb_samples)
Append data from one AudioData to the end of another.
Definition: audio_data.c:243
int nb_samples
current number of samples
Definition: audio_data.h:40
int ff_audio_data_set_channels(AudioData *a, int channels)
Definition: audio_data.c:51
int sample_size
bytes per sample
Definition: audio_data.h:46
int allocated_channels
allocated channel count
Definition: audio_data.h:43
uint8_t
int ff_audio_data_realloc(AudioData *a, int nb_samples)
Reallocate AudioData.
Definition: audio_data.c:153
const char * name
int read_only
data is read-only
Definition: audio_data.h:48
struct AudioData AudioData
Audio buffer used for intermediate storage between conversion phases.
void ff_audio_data_drain(AudioData *a, int nb_samples)
Drain samples from the start of the AudioData.
Definition: audio_data.c:299
int stride
sample byte offset within a plane
Definition: audio_data.h:47
int channels
channel count
Definition: oss_audio.c:50
int is_planar
sample format is planar
Definition: audio_data.h:44
int ff_audio_data_copy(AudioData *out, AudioData *in)
Copy data from one AudioData to another.
Definition: audio_data.c:216
uint8_t * buffer
data buffer
Definition: audio_data.h:37
AudioData * ff_audio_data_alloc(int channels, int nb_samples, enum AVSampleFormat sample_fmt, const char *name)
Allocate AudioData.
Definition: audio_data.c:110
external API header
int ff_audio_data_read_from_fifo(AVAudioFifo *af, AudioData *a, int nb_samples)
Read samples from an AVAudioFifo to AudioData.
Definition: audio_data.c:331
sample_fmt
Definition: avconv_filter.c:63
#define AVRESAMPLE_MAX_CHANNELS
Definition: avresample.h:103
out nb_samples
int ff_audio_data_add_to_fifo(AVAudioFifo *af, AudioData *a, int offset, int nb_samples)
Add samples in AudioData to an AVAudioFifo.
Definition: audio_data.c:316
Describe the class of an AVClass context structure.
Definition: log.h:33
int samples_align
allocated samples alignment
Definition: audio_data.h:51
AVSampleFormat
Audio Sample Formats.
Definition: samplefmt.h:49
Audio FIFO Buffer.
int allocated_samples
number of samples the buffer can hold
Definition: audio_data.h:39
enum AVSampleFormat sample_fmt
sample format
Definition: audio_data.h:41
int ptr_align
minimum data pointer alignment
Definition: audio_data.h:50
int planes
number of data planes
Definition: audio_data.h:45
int ff_audio_data_init(AudioData *a, uint8_t **src, int plane_size, int channels, int nb_samples, enum AVSampleFormat sample_fmt, int read_only, const char *name)
Initialize AudioData using a given source.
Definition: audio_data.c:65
uint8_t * data[AVRESAMPLE_MAX_CHANNELS]
data plane pointers
Definition: audio_data.h:36