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      1 /*
      2  * Copyright (C) 2017 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 _Included_org_drrickorang_loopback_loopback
     18 #define _Included_org_drrickorang_loopback_loopback
     19 
     20 #include <stdbool.h>
     21 #include <time.h>
     22 
     23 #ifdef __cplusplus
     24 extern "C" {
     25 #endif
     26 
     27 typedef struct {
     28     int* timeStampsMs;          // Array of milliseconds since first callback
     29     short* callbackDurations;   // Array of milliseconds between callback and previous callback
     30     short index;                // Current write position
     31     struct timespec startTime;  // Time of first callback {seconds,nanoseconds}
     32     int capacity;               // Total number of callback times/lengths that can be recorded
     33     bool exceededCapacity;      // Set only if late callbacks come after array is full
     34 } callbackTimeStamps;
     35 
     36 #define NANOS_PER_SECOND 1000000000
     37 #define NANOS_PER_MILLI 1000000
     38 #define MILLIS_PER_SECOND 1000
     39 
     40 enum STATUS_ENUM {
     41     STATUS_SUCCESS = 0,
     42     STATUS_FAIL = 1
     43 };
     44 
     45 enum JAVA_CONSTANTS_ENUM {
     46     // Must match constant 'range' in BufferPeriod.java
     47     RANGE = 1002,
     48     // Must match constants in Constant.java
     49     TEST_TYPE_LATENCY = 222,
     50     TEST_TYPE_BUFFER_PERIOD = 223,
     51     AUDIO_THREAD_TYPE_JAVA = 0,
     52     AUDIO_THREAD_TYPE_NATIVE_SLES = 1,
     53     AUDIO_THREAD_TYPE_NATIVE_AAUDIO = 2,
     54 };
     55 
     56 typedef struct {
     57     int (*computeDefaultSettings)(int performanceMode, int *samplingRate,
     58             int *playerBufferFrameCount, int *recorderBufferFrameCount);
     59     int (*init)(void **ppCtx, int samplingRate, int frameCount, int micSource,
     60             int performanceMode,
     61             int testType, double frequency1, char* byteBufferPtr, int byteBufferLength,
     62             short* loopbackTone, int maxRecordedLateCallbacks, int ignoreFirstFrames);
     63     int (*destroy)(void **ppCtx);
     64     int (*processNext)(void *pCtx, double *pSamples, long maxSamples);
     65     int* (*getRecorderBufferPeriod)(void *pCtx);
     66     int (*getRecorderMaxBufferPeriod)(void *pCtx);
     67     int64_t (*getRecorderVarianceBufferPeriod)(void *pCtx);
     68     int* (*getPlayerBufferPeriod)(void *pCtx);
     69     int (*getPlayerMaxBufferPeriod)(void *pCtx);
     70     int64_t (*getPlayerVarianceBufferPeriod)(void *pCtx);
     71     int (*getCaptureRank)(void *pCtx);
     72     int (*getPlayerTimeStampsAndExpectedBufferPeriod)(void *pCtx, callbackTimeStamps **ppTSs);
     73     int (*getRecorderTimeStampsAndExpectedBufferPeriod)(void *pCtx, callbackTimeStamps **ppTSs);
     74 } native_engine_t;
     75 
     76 typedef struct {
     77     void *context;
     78     native_engine_t *methods;
     79 } native_engine_instance_t;
     80 
     81 enum NATIVE_ENGINE_ENUM {
     82     NATIVE_ENGINE_SLES = 0,
     83     NATIVE_ENGINE_AAUDIO = 1,
     84     NATIVE_ENGINE_COUNT = NATIVE_ENGINE_AAUDIO + 1
     85 };
     86 
     87 extern native_engine_t sEngines[NATIVE_ENGINE_COUNT];
     88 
     89 #ifdef __cplusplus
     90 }
     91 #endif
     92 
     93 #endif  // _Included_org_drrickorang_loopback_loopback
     94