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Phil Burk5ed503c2017-02-01 09:38:15 -08001/*
2 * Copyright 2016 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 UTILITY_AAUDIO_UTILITIES_H
18#define UTILITY_AAUDIO_UTILITIES_H
19
Andy Hung47c5e532017-06-26 18:28:00 -070020#include <algorithm>
21#include <functional>
jiabin4a341862022-09-20 17:58:37 +000022#include <vector>
Phil Burk5ed503c2017-02-01 09:38:15 -080023#include <stdint.h>
24#include <sys/types.h>
Tom Cherry7ae78252020-04-13 15:20:50 -070025#include <unistd.h>
Phil Burk5ed503c2017-02-01 09:38:15 -080026
jiabin4a341862022-09-20 17:58:37 +000027#include <android/media/audio/common/AudioMMapPolicyInfo.h>
Phil Burk5ed503c2017-02-01 09:38:15 -080028#include <utils/Errors.h>
Kevin Rocard6d7582e2018-01-11 19:28:14 -080029#include <system/audio.h>
Phil Burk5ed503c2017-02-01 09:38:15 -080030
Phil Burka4eb0d82017-04-12 15:44:06 -070031#include "aaudio/AAudio.h"
jiabin4a341862022-09-20 17:58:37 +000032#include "aaudio/AAudioTesting.h"
Phil Burk5ed503c2017-02-01 09:38:15 -080033
34/**
35 * Convert an AAudio result into the closest matching Android status.
36 */
37android::status_t AAudioConvert_aaudioToAndroidStatus(aaudio_result_t result);
38
39/**
40 * Convert an Android status into the closest matching AAudio result.
41 */
42aaudio_result_t AAudioConvert_androidToAAudioResult(android::status_t status);
43
Phil Burke572f462017-04-20 13:03:19 -070044/**
Phil Burk4e1af9f2018-01-03 15:54:35 -080045 * Convert an aaudio_session_id_t to a value that is safe to pass to AudioFlinger.
46 * @param sessionId
47 * @return safe value
48 */
49audio_session_t AAudioConvert_aaudioToAndroidSessionId(aaudio_session_id_t sessionId);
50
51/**
Phil Burk5ed503c2017-02-01 09:38:15 -080052 * Calculate the number of bytes and prevent numeric overflow.
Phil Burk7f680132018-03-12 14:48:06 -070053 * The *sizeInBytes will be set to zero if there is an error.
54 *
Phil Burk5ed503c2017-02-01 09:38:15 -080055 * @param numFrames frame count
56 * @param bytesPerFrame size of a frame in bytes
Phil Burk7f680132018-03-12 14:48:06 -070057 * @param sizeInBytes pointer to a variable to receive total size in bytes
Phil Burk5ed503c2017-02-01 09:38:15 -080058 * @return AAUDIO_OK or negative error, eg. AAUDIO_ERROR_OUT_OF_RANGE
59 */
Phil Burk3316d5e2017-02-15 11:23:01 -080060int32_t AAudioConvert_framesToBytes(int32_t numFrames,
Phil Burk7f680132018-03-12 14:48:06 -070061 int32_t bytesPerFrame,
62 int32_t *sizeInBytes);
Phil Burk5ed503c2017-02-01 09:38:15 -080063
Phil Burk9dca9822017-05-26 14:27:43 -070064audio_format_t AAudioConvert_aaudioToAndroidDataFormat(aaudio_format_t aaudio_format);
Phil Burk5ed503c2017-02-01 09:38:15 -080065
Phil Burk9dca9822017-05-26 14:27:43 -070066aaudio_format_t AAudioConvert_androidToAAudioDataFormat(audio_format_t format);
Phil Burk5ed503c2017-02-01 09:38:15 -080067
Robert Wu310037a2022-09-06 21:48:18 +000068aaudio_format_t AAudioConvert_androidToNearestAAudioDataFormat(audio_format_t format);
Phil Burkd4ccc622017-12-20 15:32:44 -080069
70/**
71 * Note that this function does not validate the passed in value.
72 * That is done somewhere else.
73 * @return internal value
74 */
75
76audio_usage_t AAudioConvert_usageToInternal(aaudio_usage_t usage);
77
78/**
79 * Note that this function does not validate the passed in value.
80 * That is done somewhere else.
81 * @return internal value
82 */
83audio_content_type_t AAudioConvert_contentTypeToInternal(aaudio_content_type_t contentType);
84
85/**
86 * Note that this function does not validate the passed in value.
87 * That is done somewhere else.
88 * @return internal audio source
89 */
90audio_source_t AAudioConvert_inputPresetToAudioSource(aaudio_input_preset_t preset);
91
Kevin Rocard68646ba2019-03-20 13:26:49 -070092/**
93 * Note that this function does not validate the passed in value.
94 * That is done somewhere else.
95 * @return internal audio flags mask
96 */
Eric Laurentfa7fe4d2023-04-21 15:58:59 +020097audio_flags_mask_t AAudio_computeAudioFlagsMask(
Jean-Michel Trivi656bfdc2021-09-20 18:42:37 -070098 aaudio_allowed_capture_policy_t policy,
99 aaudio_spatialization_behavior_t spatializationBehavior,
Eric Laurentfa7fe4d2023-04-21 15:58:59 +0200100 bool isContentSpatialized,
101 audio_output_flags_t outputFlags);
Kevin Rocard68646ba2019-03-20 13:26:49 -0700102
Eric Laurentd17c8502019-10-24 15:58:35 -0700103audio_flags_mask_t AAudioConvert_privacySensitiveToAudioFlagsMask(
104 bool privacySensitive);
105
jiabina9094092021-06-28 20:36:45 +0000106audio_channel_mask_t AAudioConvert_aaudioToAndroidChannelLayoutMask(
107 aaudio_channel_mask_t channelMask, bool isInput);
108
109aaudio_channel_mask_t AAudioConvert_androidToAAudioChannelLayoutMask(
110 audio_channel_mask_t channelMask, bool isInput);
111
112aaudio_channel_mask_t AAudioConvert_androidToAAudioChannelIndexMask(
113 audio_channel_mask_t channelMask);
114
115audio_channel_mask_t AAudioConvert_aaudioToAndroidChannelIndexMask(
116 aaudio_channel_mask_t channelMask);
117
118aaudio_channel_mask_t AAudioConvert_androidToAAudioChannelMask(
119 audio_channel_mask_t channelMask, bool isInput, bool indexMaskRequired);
120
121audio_channel_mask_t AAudioConvert_aaudioToAndroidChannelMask(
122 aaudio_channel_mask_t channelMask, bool isInput);
123
124bool AAudio_isChannelIndexMask(aaudio_channel_mask_t channelMask);
125
126int32_t AAudioConvert_channelMaskToCount(aaudio_channel_mask_t channelMask);
127
128aaudio_channel_mask_t AAudioConvert_channelCountToMask(int32_t channelCount);
129
130audio_channel_mask_t AAudio_getChannelMaskForOpen(
131 aaudio_channel_mask_t channelMask, int32_t samplesPerFrame, bool isInput);
132
Phil Burkc8f69a02017-05-11 15:53:06 -0700133// Note that this code may be replaced by Settings or by some other system configuration tool.
134
Phil Burkb31b66f2019-09-30 09:33:41 -0700135/**
Phil Burkfd34a932017-07-19 07:03:52 -0700136 * Read a system property that specifies the number of extra microseconds that a thread
137 * should sleep when waiting for another thread to service a FIFO. This is used
138 * to avoid the waking thread from being overly optimistic about the other threads
139 * wakeup timing. This value should be set high enough to cover typical scheduling jitter
140 * for a real-time thread.
141 *
142 * @return number of microseconds to delay the wakeup.
143 */
144int32_t AAudioProperty_getWakeupDelayMicros();
Phil Burkfd34a932017-07-19 07:03:52 -0700145#define AAUDIO_PROP_WAKEUP_DELAY_USEC "aaudio.wakeup_delay_usec"
146
147/**
148 * Read a system property that specifies the minimum sleep time when polling the FIFO.
149 *
150 * @return minimum number of microseconds to sleep.
151 */
152int32_t AAudioProperty_getMinimumSleepMicros();
Phil Burkfd34a932017-07-19 07:03:52 -0700153#define AAUDIO_PROP_MINIMUM_SLEEP_USEC "aaudio.minimum_sleep_usec"
154
155/**
Phil Burkb31b66f2019-09-30 09:33:41 -0700156 * Read a system property that specifies an offset that will be added to MMAP timestamps.
157 * This can be used to correct bias in the timestamp.
158 * It can also be used to analyze the time distribution of the timestamp
159 * by progressively modifying the offset and listening for glitches.
160 *
161 * @return number of microseconds to offset the time part of an MMAP timestamp
162 */
163int32_t AAudioProperty_getInputMMapOffsetMicros();
164#define AAUDIO_PROP_INPUT_MMAP_OFFSET_USEC "aaudio.in_mmap_offset_usec"
165
166int32_t AAudioProperty_getOutputMMapOffsetMicros();
167#define AAUDIO_PROP_OUTPUT_MMAP_OFFSET_USEC "aaudio.out_mmap_offset_usec"
Phil Burk5cc83c32017-11-28 15:43:18 -0800168
Phil Burkef34be52019-09-26 13:45:25 -0700169// These are powers of two that can be combined as a bit mask.
170// AAUDIO_LOG_CLOCK_MODEL_HISTOGRAM must be enabled before the stream is opened.
171#define AAUDIO_LOG_CLOCK_MODEL_HISTOGRAM 1
172#define AAUDIO_LOG_RESERVED_2 2
173#define AAUDIO_LOG_RESERVED_4 4
174#define AAUDIO_LOG_RESERVED_8 8
175
176/**
177 * Use a mask to enable various logs in AAudio.
178 * @return mask that enables various AAudio logs, such as AAUDIO_LOG_CLOCK_MODEL_HISTOGRAM
179 */
180int32_t AAudioProperty_getLogMask();
181#define AAUDIO_PROP_LOG_MASK "aaudio.log_mask"
182
Phil Burk5cc83c32017-11-28 15:43:18 -0800183/**
184 * Is flush allowed for the given state?
185 * @param state
186 * @return AAUDIO_OK if allowed or an error
187 */
188aaudio_result_t AAudio_isFlushAllowed(aaudio_stream_state_t state);
189
Andy Hung47c5e532017-06-26 18:28:00 -0700190/**
191 * Try a function f until it returns true.
192 *
193 * The function is always called at least once.
194 *
195 * @param f the function to evaluate, which returns a bool.
196 * @param times the number of times to evaluate f.
197 * @param sleepMs the sleep time per check of f, if greater than 0.
198 * @return true if f() eventually returns true.
199 */
200static inline bool AAudio_tryUntilTrue(
jiabind5bd06a2021-04-27 22:04:08 +0000201 const std::function<bool()>& f, int times, int sleepMs) {
Andy Hung47c5e532017-06-26 18:28:00 -0700202 static const useconds_t US_PER_MS = 1000;
203
204 sleepMs = std::max(sleepMs, 0);
205 for (;;) {
206 if (f()) return true;
207 if (times <= 1) return false;
208 --times;
209 usleep(sleepMs * US_PER_MS);
210 }
211}
212
Phil Burk97350f92017-07-21 15:59:44 -0700213
214/**
215 * Simple double buffer for a structure that can be written occasionally and read occasionally.
216 * This allows a SINGLE writer with multiple readers.
217 *
218 * It is OK if the FIFO overflows and we lose old values.
219 * It is also OK if we read an old value.
220 * Thread may return a non-atomic result if the other thread is rapidly writing
221 * new values on another core.
222 */
223template <class T>
224class SimpleDoubleBuffer {
225public:
226 SimpleDoubleBuffer()
Phil Burkbcc36742017-08-31 17:24:51 -0700227 : mValues() {}
Phil Burk97350f92017-07-21 15:59:44 -0700228
229 __attribute__((no_sanitize("integer")))
230 void write(T value) {
231 int index = mCounter.load() & 1;
232 mValues[index] = value;
233 mCounter++; // Increment AFTER updating storage, OK if it wraps.
234 }
235
Phil Burkbcc36742017-08-31 17:24:51 -0700236 /**
237 * This should only be called by the same thread that calls write() or when
238 * no other thread is calling write.
239 */
240 void clear() {
241 mCounter.store(0);
242 }
243
Phil Burk97350f92017-07-21 15:59:44 -0700244 T read() const {
245 T result;
246 int before;
247 int after;
248 int timeout = 3;
249 do {
250 // Check to see if a write occurred while were reading.
251 before = mCounter.load();
252 int index = (before & 1) ^ 1;
253 result = mValues[index];
254 after = mCounter.load();
Phil Burkbcc36742017-08-31 17:24:51 -0700255 } while ((after != before) && (after > 0) && (--timeout > 0));
Phil Burk97350f92017-07-21 15:59:44 -0700256 return result;
257 }
258
259 /**
260 * @return true if at least one value has been written
261 */
262 bool isValid() const {
263 return mCounter.load() > 0;
264 }
265
266private:
267 T mValues[2];
Phil Burkbcc36742017-08-31 17:24:51 -0700268 std::atomic<int> mCounter{0};
Phil Burk97350f92017-07-21 15:59:44 -0700269};
270
271class Timestamp {
272public:
jiabind5bd06a2021-04-27 22:04:08 +0000273 Timestamp() = default;
Phil Burk97350f92017-07-21 15:59:44 -0700274 Timestamp(int64_t position, int64_t nanoseconds)
275 : mPosition(position)
276 , mNanoseconds(nanoseconds) {}
277
278 int64_t getPosition() const { return mPosition; }
279
280 int64_t getNanoseconds() const { return mNanoseconds; }
281
282private:
283 // These cannot be const because we need to implement the copy assignment operator.
jiabind5bd06a2021-04-27 22:04:08 +0000284 int64_t mPosition{0};
285 int64_t mNanoseconds{0};
Phil Burk97350f92017-07-21 15:59:44 -0700286};
287
Phil Burkbcc36742017-08-31 17:24:51 -0700288
289/**
290 * Pass a request to another thread.
291 * This is used when one thread, A, wants another thread, B, to do something.
292 * A naive approach would be for A to set a flag and for B to clear it when done.
293 * But that creates a race condition. This technique avoids the race condition.
294 *
295 * Assumes only one requester and one acknowledger.
296 */
297class AtomicRequestor {
298public:
Phil Burk2d5ba532017-09-06 14:36:11 -0700299
300 __attribute__((no_sanitize("integer")))
Phil Burkbcc36742017-08-31 17:24:51 -0700301 void request() {
Phil Burkbcc36742017-08-31 17:24:51 -0700302 mRequested++;
303 }
304
Phil Burk2d5ba532017-09-06 14:36:11 -0700305 __attribute__((no_sanitize("integer")))
Phil Burkbcc36742017-08-31 17:24:51 -0700306 bool isRequested() {
Phil Burk2d5ba532017-09-06 14:36:11 -0700307 return (mRequested.load() - mAcknowledged.load()) > 0;
Phil Burkbcc36742017-08-31 17:24:51 -0700308 }
309
Phil Burk2d5ba532017-09-06 14:36:11 -0700310 __attribute__((no_sanitize("integer")))
Phil Burkbcc36742017-08-31 17:24:51 -0700311 void acknowledge() {
312 mAcknowledged++;
313 }
314
315private:
316 std::atomic<int> mRequested{0};
317 std::atomic<int> mAcknowledged{0};
318};
jiabina9094092021-06-28 20:36:45 +0000319
320enum {
321 /**
322 * Audio channel index mask, only used internally.
323 */
324 AAUDIO_CHANNEL_BIT_INDEX = 0x80000000,
325 AAUDIO_CHANNEL_INDEX_MASK_1 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 1) - 1,
326 AAUDIO_CHANNEL_INDEX_MASK_2 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 2) - 1,
327 AAUDIO_CHANNEL_INDEX_MASK_3 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 3) - 1,
328 AAUDIO_CHANNEL_INDEX_MASK_4 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 4) - 1,
329 AAUDIO_CHANNEL_INDEX_MASK_5 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 5) - 1,
330 AAUDIO_CHANNEL_INDEX_MASK_6 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 6) - 1,
331 AAUDIO_CHANNEL_INDEX_MASK_7 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 7) - 1,
332 AAUDIO_CHANNEL_INDEX_MASK_8 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 8) - 1,
333 AAUDIO_CHANNEL_INDEX_MASK_9 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 9) - 1,
334 AAUDIO_CHANNEL_INDEX_MASK_10 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 10) - 1,
335 AAUDIO_CHANNEL_INDEX_MASK_11 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 11) - 1,
336 AAUDIO_CHANNEL_INDEX_MASK_12 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 12) - 1,
337 AAUDIO_CHANNEL_INDEX_MASK_13 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 13) - 1,
338 AAUDIO_CHANNEL_INDEX_MASK_14 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 14) - 1,
339 AAUDIO_CHANNEL_INDEX_MASK_15 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 15) - 1,
340 AAUDIO_CHANNEL_INDEX_MASK_16 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 16) - 1,
341 AAUDIO_CHANNEL_INDEX_MASK_17 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 17) - 1,
342 AAUDIO_CHANNEL_INDEX_MASK_18 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 18) - 1,
343 AAUDIO_CHANNEL_INDEX_MASK_19 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 19) - 1,
344 AAUDIO_CHANNEL_INDEX_MASK_20 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 20) - 1,
345 AAUDIO_CHANNEL_INDEX_MASK_21 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 21) - 1,
346 AAUDIO_CHANNEL_INDEX_MASK_22 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 22) - 1,
347 AAUDIO_CHANNEL_INDEX_MASK_23 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 23) - 1,
348 AAUDIO_CHANNEL_INDEX_MASK_24 = AAUDIO_CHANNEL_BIT_INDEX | (1 << 24) - 1,
349};
350
jiabine4a458a2024-05-31 17:52:26 +0000351/**
352 * Returns the aaudio mmap policy based on the vector of mmap policy info. The rule as
353 * 1. Returns AUTO if any of the policy is AUTO or ALWAYS
354 * 2. Returns NEVER if all of the policies are NEVER or UNSPECIFIED
355 * 3. Returns default policy if all of the policies are UNSPECIFIED
356 *
357 * @param policyInfos
358 * @param defaultPolicy
359 * @return
360 */
jiabin4a341862022-09-20 17:58:37 +0000361aaudio_policy_t AAudio_getAAudioPolicy(
jiabine4a458a2024-05-31 17:52:26 +0000362 const std::vector<android::media::audio::common::AudioMMapPolicyInfo>& policyInfos,
363 android::media::audio::common::AudioMMapPolicy defaultPolicy =
364 android::media::audio::common::AudioMMapPolicy::NEVER);
jiabin4a341862022-09-20 17:58:37 +0000365
Phil Burk5ed503c2017-02-01 09:38:15 -0800366#endif //UTILITY_AAUDIO_UTILITIES_H