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 "APM::AudioGain"
18 //#define LOG_NDEBUG 0
19
20 //#define VERY_VERBOSE_LOGGING
21 #ifdef VERY_VERBOSE_LOGGING
22 #define ALOGVV ALOGV
23 #else
24 #define ALOGVV(a...) do { } while(0)
25 #endif
26
27 #include "AudioGain.h"
28 #include <utils/Log.h>
29 #include <utils/String8.h>
30
31 #include <math.h>
32
33 namespace android {
34
AudioGain(int index,bool useInChannelMask)35 AudioGain::AudioGain(int index, bool useInChannelMask)
36 {
37 mIndex = index;
38 mUseInChannelMask = useInChannelMask;
39 memset(&mGain, 0, sizeof(struct audio_gain));
40 }
41
getDefaultConfig(struct audio_gain_config * config)42 void AudioGain::getDefaultConfig(struct audio_gain_config *config)
43 {
44 config->index = mIndex;
45 config->mode = mGain.mode;
46 config->channel_mask = mGain.channel_mask;
47 if ((mGain.mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
48 config->values[0] = mGain.default_value;
49 } else {
50 uint32_t numValues;
51 if (mUseInChannelMask) {
52 numValues = audio_channel_count_from_in_mask(mGain.channel_mask);
53 } else {
54 numValues = audio_channel_count_from_out_mask(mGain.channel_mask);
55 }
56 for (size_t i = 0; i < numValues; i++) {
57 config->values[i] = mGain.default_value;
58 }
59 }
60 if ((mGain.mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
61 config->ramp_duration_ms = mGain.min_ramp_ms;
62 }
63 }
64
checkConfig(const struct audio_gain_config * config)65 status_t AudioGain::checkConfig(const struct audio_gain_config *config)
66 {
67 if ((config->mode & ~mGain.mode) != 0) {
68 return BAD_VALUE;
69 }
70 if ((config->mode & AUDIO_GAIN_MODE_JOINT) == AUDIO_GAIN_MODE_JOINT) {
71 if ((config->values[0] < mGain.min_value) ||
72 (config->values[0] > mGain.max_value)) {
73 return BAD_VALUE;
74 }
75 } else {
76 if ((config->channel_mask & ~mGain.channel_mask) != 0) {
77 return BAD_VALUE;
78 }
79 uint32_t numValues;
80 if (mUseInChannelMask) {
81 numValues = audio_channel_count_from_in_mask(config->channel_mask);
82 } else {
83 numValues = audio_channel_count_from_out_mask(config->channel_mask);
84 }
85 for (size_t i = 0; i < numValues; i++) {
86 if ((config->values[i] < mGain.min_value) ||
87 (config->values[i] > mGain.max_value)) {
88 return BAD_VALUE;
89 }
90 }
91 }
92 if ((config->mode & AUDIO_GAIN_MODE_RAMP) == AUDIO_GAIN_MODE_RAMP) {
93 if ((config->ramp_duration_ms < mGain.min_ramp_ms) ||
94 (config->ramp_duration_ms > mGain.max_ramp_ms)) {
95 return BAD_VALUE;
96 }
97 }
98 return NO_ERROR;
99 }
100
dump(int fd,int spaces,int index) const101 void AudioGain::dump(int fd, int spaces, int index) const
102 {
103 const size_t SIZE = 256;
104 char buffer[SIZE];
105 String8 result;
106
107 snprintf(buffer, SIZE, "%*sGain %d:\n", spaces, "", index+1);
108 result.append(buffer);
109 snprintf(buffer, SIZE, "%*s- mode: %08x\n", spaces, "", mGain.mode);
110 result.append(buffer);
111 snprintf(buffer, SIZE, "%*s- channel_mask: %08x\n", spaces, "", mGain.channel_mask);
112 result.append(buffer);
113 snprintf(buffer, SIZE, "%*s- min_value: %d mB\n", spaces, "", mGain.min_value);
114 result.append(buffer);
115 snprintf(buffer, SIZE, "%*s- max_value: %d mB\n", spaces, "", mGain.max_value);
116 result.append(buffer);
117 snprintf(buffer, SIZE, "%*s- default_value: %d mB\n", spaces, "", mGain.default_value);
118 result.append(buffer);
119 snprintf(buffer, SIZE, "%*s- step_value: %d mB\n", spaces, "", mGain.step_value);
120 result.append(buffer);
121 snprintf(buffer, SIZE, "%*s- min_ramp_ms: %d ms\n", spaces, "", mGain.min_ramp_ms);
122 result.append(buffer);
123 snprintf(buffer, SIZE, "%*s- max_ramp_ms: %d ms\n", spaces, "", mGain.max_ramp_ms);
124 result.append(buffer);
125
126 write(fd, result.string(), result.size());
127 }
128
129 }; // namespace android
130