| /* |
| * 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. |
| */ |
| |
| // Play sine waves using an AAudio callback. |
| |
| #include <assert.h> |
| #include <unistd.h> |
| #include <stdlib.h> |
| #include <sched.h> |
| #include <stdio.h> |
| #include <math.h> |
| #include <time.h> |
| #include <aaudio/AAudio.h> |
| #include "AAudioExampleUtils.h" |
| #include "AAudioSimplePlayer.h" |
| |
| #define NUM_SECONDS 5 |
| |
| // Application data that gets passed to the callback. |
| #define MAX_FRAME_COUNT_RECORDS 256 |
| |
| int main(int argc, char **argv) |
| { |
| (void)argc; // unused |
| AAudioSimplePlayer player; |
| SineThreadedData_t myData; |
| aaudio_result_t result; |
| |
| // 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 - Play a sine sweep using an AAudio callback\n", argv[0]); |
| |
| myData.schedulerChecked = false; |
| |
| result = player.open(2, 44100, AAUDIO_FORMAT_PCM_FLOAT, |
| SimplePlayerDataCallbackProc, SimplePlayerErrorCallbackProc, &myData); |
| if (result != AAUDIO_OK) { |
| fprintf(stderr, "ERROR - player.open() returned %d\n", result); |
| goto error; |
| } |
| printf("player.getFramesPerSecond() = %d\n", player.getFramesPerSecond()); |
| printf("player.getChannelCount() = %d\n", player.getChannelCount()); |
| myData.sineOsc1.setup(440.0, 48000); |
| myData.sineOsc1.setSweep(300.0, 600.0, 5.0); |
| myData.sineOsc2.setup(660.0, 48000); |
| myData.sineOsc2.setSweep(350.0, 900.0, 7.0); |
| |
| #if 0 |
| result = player.prime(); // FIXME crashes AudioTrack.cpp |
| if (result != AAUDIO_OK) { |
| fprintf(stderr, "ERROR - player.prime() returned %d\n", result); |
| goto error; |
| } |
| #endif |
| |
| result = player.start(); |
| if (result != AAUDIO_OK) { |
| fprintf(stderr, "ERROR - player.start() returned %d\n", result); |
| goto error; |
| } |
| |
| printf("Sleep for %d seconds while audio plays in a callback thread.\n", NUM_SECONDS); |
| for (int second = 0; second < NUM_SECONDS; second++) |
| { |
| const struct timespec request = { .tv_sec = 1, .tv_nsec = 0 }; |
| (void) clock_nanosleep(CLOCK_MONOTONIC, 0 /*flags*/, &request, NULL /*remain*/); |
| |
| aaudio_stream_state_t state; |
| result = AAudioStream_waitForStateChange(player.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("framesWritten = %d\n", (int) AAudioStream_getFramesWritten(player.getStream())); |
| } |
| printf("Woke up now.\n"); |
| |
| printf("call stop()\n"); |
| result = player.stop(); |
| if (result != AAUDIO_OK) { |
| goto error; |
| } |
| printf("call close()\n"); |
| result = player.close(); |
| if (result != AAUDIO_OK) { |
| goto error; |
| } |
| |
| if (myData.schedulerChecked) { |
| printf("scheduler = 0x%08x, SCHED_FIFO = 0x%08X\n", |
| myData.scheduler, |
| SCHED_FIFO); |
| } |
| |
| printf("SUCCESS\n"); |
| return EXIT_SUCCESS; |
| error: |
| player.close(); |
| printf("exiting - AAudio result = %d = %s\n", result, AAudio_convertResultToText(result)); |
| return EXIT_FAILURE; |
| } |
| |