1 /*
2 * Copyright (C) 2015 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 #define LOG_TAG "audio_hw_dsm_feedback"
18 /*#define LOG_NDEBUG 0*/
19 #define LOG_NDDEBUG 0
20
21 #include <errno.h>
22 #include <math.h>
23 #include <log/log.h>
24
25 #include "audio_hw.h"
26 #include "platform.h"
27 #include "platform_api.h"
28 #include <stdlib.h>
29
30
31 static struct pcm_config pcm_config_dsm = {
32 .channels = 2,
33 .rate = 48000,
34 .period_size = 256,
35 .period_count = 4,
36 .format = PCM_FORMAT_S16_LE,
37 .start_threshold = 0,
38 .stop_threshold = INT_MAX,
39 .avail_min = 0,
40 };
41
start_dsm_feedback_processing(struct audio_device * adev,int enable)42 int start_dsm_feedback_processing(struct audio_device *adev, int enable)
43 {
44 int ret = 0;
45 int32_t pcm_dev_tx_id = -1;
46 static struct pcm *dsm_pcm_handle = NULL;
47
48 if (enable) {
49 /*do nothing if already enabled*/
50 if (dsm_pcm_handle)
51 return ret;
52
53 pcm_dev_tx_id = platform_get_pcm_device_id(USECASE_AUDIO_DSM_FEEDBACK, PCM_CAPTURE);
54 if (pcm_dev_tx_id < 0) {
55 ALOGE("%s: Invalid pcm device for usecase (%d)",
56 __func__, USECASE_AUDIO_DSM_FEEDBACK);
57 ret = -ENODEV;
58 goto close;
59 }
60
61 dsm_pcm_handle = pcm_open(adev->snd_card,
62 pcm_dev_tx_id,
63 PCM_IN, &pcm_config_dsm);
64 if (dsm_pcm_handle && !pcm_is_ready(dsm_pcm_handle)) {
65 ALOGE("%s: %s", __func__, pcm_get_error(dsm_pcm_handle));
66 ret = -EIO;
67 goto close;
68 }
69
70 if (pcm_start(dsm_pcm_handle) < 0) {
71 ALOGE("%s: pcm start for RX failed", __func__);
72 ret = -EINVAL;
73 goto close;
74 }
75
76 return ret;
77 }
78
79 close:
80 /*close pcm if disable or error happend in opening*/
81 if (dsm_pcm_handle) {
82 pcm_close(dsm_pcm_handle);
83 dsm_pcm_handle = NULL;
84 }
85
86 return ret;
87 }
88
audio_extn_dsm_feedback_enable(struct audio_device * adev,snd_device_t snd_device,int benable)89 void audio_extn_dsm_feedback_enable(struct audio_device *adev,
90 snd_device_t snd_device,
91 int benable)
92 {
93 if ( NULL == adev )
94 return;
95
96 if( snd_device == SND_DEVICE_OUT_SPEAKER ||
97 snd_device == SND_DEVICE_OUT_SPEAKER_REVERSE ||
98 snd_device == SND_DEVICE_OUT_VOICE_SPEAKER ||
99 snd_device == SND_DEVICE_OUT_SPEAKER_SAFE ||
100 snd_device == SND_DEVICE_OUT_SPEAKER_AND_HEADPHONES ||
101 snd_device == SND_DEVICE_OUT_SPEAKER_AND_LINE ||
102 snd_device == SND_DEVICE_OUT_SPEAKER_SAFE_AND_HEADPHONES ||
103 snd_device == SND_DEVICE_OUT_SPEAKER_SAFE_AND_LINE )
104 start_dsm_feedback_processing(adev, benable);
105 }
106