1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ANDROID_SYSTEM_MEDIA_ALSA_UTILS_ALSA_DEVICE_PROXY_H
18#define ANDROID_SYSTEM_MEDIA_ALSA_UTILS_ALSA_DEVICE_PROXY_H
19
20#include <tinyalsa/asoundlib.h>
21
22#include "alsa_device_profile.h"
23
24typedef struct {
25    alsa_device_profile* profile;
26
27    struct pcm_config alsa_config;
28
29    struct pcm * pcm;
30
31    size_t frame_size;    /* valid after proxy_prepare(), the frame size in bytes */
32    uint64_t transferred; /* the total frames transferred, not cleared on standby */
33} alsa_device_proxy;
34
35void proxy_prepare(alsa_device_proxy * proxy, alsa_device_profile * profile,
36                   struct pcm_config * config);
37
38unsigned proxy_get_sample_rate(const alsa_device_proxy * proxy);
39enum pcm_format proxy_get_format(const alsa_device_proxy * proxy);
40unsigned proxy_get_channel_count(const alsa_device_proxy * proxy);
41
42unsigned int proxy_get_period_size(const alsa_device_proxy * proxy);
43
44unsigned proxy_get_latency(const alsa_device_proxy * proxy);
45
46int proxy_get_presentation_position(const alsa_device_proxy * proxy,
47        uint64_t *frames, struct timespec *timestamp);
48
49int proxy_open(alsa_device_proxy * proxy);
50void proxy_close(alsa_device_proxy * proxy);
51
52int proxy_write(alsa_device_proxy * proxy, const void *data, unsigned int count);
53int proxy_read(const alsa_device_proxy * proxy, void *data, unsigned int count);
54
55#endif /* ANDROID_SYSTEM_MEDIA_ALSA_UTILS_ALSA_DEVICE_PROXY_H */
56