1 /*
2  * Copyright (c) 2022 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef ALSA_SND_CAPTURE_H
17 #define ALSA_SND_CAPTURE_H
18 
19 #include "alsa_soundcard.h"
20 
21 #ifdef __cplusplus
22 extern "C" {
23 #endif
24 
25 typedef void* CapturePriData;
26 
27 struct AlsaCapture {
28     struct AlsaSoundCard soundCard;
29     enum AudioPortPin descPins;
30     bool muteState;
31     bool periodEvent; /* produce poll event after each period */
32     snd_pcm_sframes_t bufferSize;
33     snd_pcm_sframes_t periodSize;
34     unsigned int bufferTime;    /* (0.5s): ring buffer length in us */
35     unsigned int periodTime;    /* (0.1s): period time in us */
36     int resample;    /* enable alsa-lib resampling */
37     CapturePriData priData;
38 
39     /* Capture scene */
40     int32_t (*Init)(struct AlsaCapture*);
41     int32_t (*Open)(struct AlsaCapture *);
42     int32_t (*SelectScene)(struct AlsaCapture *, enum AudioPortPin, const struct PathDeviceInfo *);
43     int32_t (*Start)(struct AlsaCapture *);
44     int32_t (*Stop)(struct AlsaCapture *);
45     int32_t (*Close)(struct AlsaCapture *);
46     int32_t (*Read)(struct AlsaCapture *, struct AudioHwCaptureParam *);
47     int32_t (*GetMmapPosition)(struct AlsaCapture *);
48     int32_t (*MmapRead)(struct AlsaCapture *, const struct AudioHwCaptureParam *);
49 
50     /* volume operation */
51     int32_t (*GetVolThreshold)(struct AlsaCapture *, long *, long *);
52     int32_t (*GetVolume)(struct AlsaCapture *, long *);
53     int32_t (*SetVolume)(struct AlsaCapture *, long);
54 
55     /* gain operation */
56     int32_t (*GetGainThreshold)(struct AlsaCapture *, float *, float *);
57     int32_t (*GetGain)(struct AlsaCapture *, float *);
58     int32_t (*SetGain)(struct AlsaCapture *, float);
59 
60     /* mute operation */
61     bool  (*GetMute)(struct AlsaCapture *);
62     int32_t (*SetMute)(struct AlsaCapture *, bool);
63 
64     /* set pause or resume state */
65     int32_t (*SetPauseState)(struct AlsaCapture *, bool);
66 };
67 
68 struct AlsaCapture *CaptureCreateInstance(const char* adapterName);
69 struct AlsaCapture *CaptureGetInstance(const char *adapterName);
70 int32_t CaptureSetParams(struct AlsaCapture *captureIns, const struct AudioHwCaptureParam *handleData);
71 void  CaptureSetPriData(struct AlsaCapture *captureIns, CapturePriData data);
72 CapturePriData CaptureGetPriData(struct AlsaCapture *captureIns);
73 
74 /*
75     Different platforms implement this function rewriting capture implementation
76  */
77 int32_t CaptureOverrideFunc(struct AlsaCapture *captureIns);
78 
79 #ifdef __cplusplus
80 }
81 #endif
82 
83 #endif /* ALSA_SND_CAPTURE_H */