| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| // Record input using AAudio and display the peak amplitudes. |
| |
| #include <assert.h> |
| #include <unistd.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <math.h> |
| #include <time.h> |
| #include <aaudio/AAudio.h> |
| #include "AAudioExampleUtils.h" |
| #include "AAudioSimpleRecorder.h" |
| |
| #define NUM_SECONDS 5 |
| |
| int main(int argc, char **argv) |
| { |
| (void)argc; // unused |
| AAudioSimpleRecorder recorder; |
| PeakTrackerData_t myData = {0.0}; |
| aaudio_result_t result; |
| aaudio_stream_state_t state; |
| const int displayRateHz = 20; // arbitrary |
| const int loopsNeeded = NUM_SECONDS * displayRateHz; |
| |
| // Make printf print immediately so that debug info is not stuck |
| // in a buffer if we hang or crash. |
| setvbuf(stdout, nullptr, _IONBF, (size_t) 0); |
| printf("%s - Display audio input using an AAudio callback\n", argv[0]); |
| |
| result = recorder.open(2, 48000, AAUDIO_FORMAT_PCM_I16, |
| SimpleRecorderDataCallbackProc, SimpleRecorderErrorCallbackProc, &myData); |
| if (result != AAUDIO_OK) { |
| fprintf(stderr, "ERROR - recorder.open() returned %d\n", result); |
| goto error; |
| } |
| printf("recorder.getFramesPerSecond() = %d\n", recorder.getFramesPerSecond()); |
| printf("recorder.getSamplesPerFrame() = %d\n", recorder.getSamplesPerFrame()); |
| |
| result = recorder.start(); |
| if (result != AAUDIO_OK) { |
| fprintf(stderr, "ERROR - recorder.start() returned %d\n", result); |
| goto error; |
| } |
| |
| printf("Sleep for %d seconds while audio record in a callback thread.\n", NUM_SECONDS); |
| for (int i = 0; i < loopsNeeded; i++) |
| { |
| const struct timespec request = { .tv_sec = 0, |
| .tv_nsec = NANOS_PER_SECOND / displayRateHz }; |
| (void) clock_nanosleep(CLOCK_MONOTONIC, 0 /*flags*/, &request, NULL /*remain*/); |
| printf("%08d: ", (int)recorder.getFramesRead()); |
| displayPeakLevel(myData.peakLevel); |
| |
| result = AAudioStream_waitForStateChange(recorder.getStream(), |
| AAUDIO_STREAM_STATE_CLOSED, |
| &state, |
| 0); |
| if (result != AAUDIO_OK) { |
| fprintf(stderr, "ERROR - AAudioStream_waitForStateChange() returned %d\n", result); |
| goto error; |
| } |
| if (state != AAUDIO_STREAM_STATE_STARTING && state != AAUDIO_STREAM_STATE_STARTED) { |
| printf("Stream state is %d %s!\n", state, AAudio_convertStreamStateToText(state)); |
| break; |
| } |
| } |
| printf("Woke up. Stop for a moment.\n"); |
| |
| result = recorder.stop(); |
| if (result != AAUDIO_OK) { |
| goto error; |
| } |
| usleep(2000 * 1000); |
| result = recorder.start(); |
| if (result != AAUDIO_OK) { |
| fprintf(stderr, "ERROR - recorder.start() returned %d\n", result); |
| goto error; |
| } |
| |
| printf("Sleep for %d seconds while audio records in a callback thread.\n", NUM_SECONDS); |
| for (int i = 0; i < loopsNeeded; i++) |
| { |
| const struct timespec request = { .tv_sec = 0, |
| .tv_nsec = NANOS_PER_SECOND / displayRateHz }; |
| (void) clock_nanosleep(CLOCK_MONOTONIC, 0 /*flags*/, &request, NULL /*remain*/); |
| printf("%08d: ", (int)recorder.getFramesRead()); |
| displayPeakLevel(myData.peakLevel); |
| |
| state = AAudioStream_getState(recorder.getStream()); |
| if (state != AAUDIO_STREAM_STATE_STARTING && state != AAUDIO_STREAM_STATE_STARTED) { |
| printf("Stream state is %d %s!\n", state, AAudio_convertStreamStateToText(state)); |
| break; |
| } |
| } |
| printf("Woke up now.\n"); |
| |
| result = recorder.stop(); |
| if (result != AAUDIO_OK) { |
| goto error; |
| } |
| result = recorder.close(); |
| if (result != AAUDIO_OK) { |
| goto error; |
| } |
| |
| printf("SUCCESS\n"); |
| return EXIT_SUCCESS; |
| error: |
| recorder.close(); |
| printf("exiting - AAudio result = %d = %s\n", result, AAudio_convertResultToText(result)); |
| return EXIT_FAILURE; |
| } |
| |