1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_SYSTEM_MEDIA_ALSA_UTILS_ALSA_DEVICE_PROXY_H
#define ANDROID_SYSTEM_MEDIA_ALSA_UTILS_ALSA_DEVICE_PROXY_H
#include <tinyalsa/asoundlib.h>
#include "alsa_device_profile.h"
typedef struct {
alsa_device_profile* profile;
struct pcm_config alsa_config;
struct pcm * pcm;
size_t frame_size; /* valid after proxy_prepare(), the frame size in bytes */
uint64_t transferred; /* the total frames transferred, not cleared on standby */
} alsa_device_proxy;
void proxy_prepare(alsa_device_proxy * proxy, alsa_device_profile * profile,
struct pcm_config * config);
unsigned proxy_get_sample_rate(const alsa_device_proxy * proxy);
enum pcm_format proxy_get_format(const alsa_device_proxy * proxy);
unsigned proxy_get_channel_count(const alsa_device_proxy * proxy);
unsigned int proxy_get_period_size(const alsa_device_proxy * proxy);
unsigned proxy_get_latency(const alsa_device_proxy * proxy);
int proxy_get_presentation_position(const alsa_device_proxy * proxy,
uint64_t *frames, struct timespec *timestamp);
int proxy_open(alsa_device_proxy * proxy);
void proxy_close(alsa_device_proxy * proxy);
int proxy_write(alsa_device_proxy * proxy, const void *data, unsigned int count);
int proxy_read(const alsa_device_proxy * proxy, void *data, unsigned int count);
#endif /* ANDROID_SYSTEM_MEDIA_ALSA_UTILS_ALSA_DEVICE_PROXY_H */
|
