diff options
author | sanine <sanine.not@pm.me> | 2022-08-27 23:52:56 -0500 |
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committer | sanine <sanine.not@pm.me> | 2022-08-27 23:52:56 -0500 |
commit | a4dd0ad63c00f4dee3b86dfd3075d1d61b2b3180 (patch) | |
tree | 13bd5bfa15e6fea2a12f176bae79adf9c6fd0933 /portaudio/bindings/cpp/example/sine.cxx | |
parent | bde3e4f1bb7b8f8abca0884a7d994ee1c17a66b1 (diff) |
add plibsys
Diffstat (limited to 'portaudio/bindings/cpp/example/sine.cxx')
-rw-r--r-- | portaudio/bindings/cpp/example/sine.cxx | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/portaudio/bindings/cpp/example/sine.cxx b/portaudio/bindings/cpp/example/sine.cxx deleted file mode 100644 index 0c772e6..0000000 --- a/portaudio/bindings/cpp/example/sine.cxx +++ /dev/null @@ -1,137 +0,0 @@ -// --------------------------------------------------------------------------------------- - -#include <iostream> -#include <cmath> -#include <cassert> -#include <cstddef> -#include "portaudiocpp/PortAudioCpp.hxx" - -// --------------------------------------------------------------------------------------- - -// Some constants: -const int NUM_SECONDS = 5; -const double SAMPLE_RATE = 44100.0; -const int FRAMES_PER_BUFFER = 64; -const int TABLE_SIZE = 200; - -// --------------------------------------------------------------------------------------- - -// SineGenerator class: -class SineGenerator -{ -public: - SineGenerator(int tableSize) : tableSize_(tableSize), leftPhase_(0), rightPhase_(0) - { - const double PI = 3.14159265; - table_ = new float[tableSize]; - for (int i = 0; i < tableSize; ++i) - { - table_[i] = 0.125f * (float)sin(((double)i/(double)tableSize)*PI*2.); - } - } - - ~SineGenerator() - { - delete[] table_; - } - - int generate(const void *inputBuffer, void *outputBuffer, unsigned long framesPerBuffer, - const PaStreamCallbackTimeInfo *timeInfo, PaStreamCallbackFlags statusFlags) - { - assert(outputBuffer != NULL); - - float **out = static_cast<float **>(outputBuffer); - - for (unsigned int i = 0; i < framesPerBuffer; ++i) - { - out[0][i] = table_[leftPhase_]; - out[1][i] = table_[rightPhase_]; - - leftPhase_ += 1; - if (leftPhase_ >= tableSize_) - leftPhase_ -= tableSize_; - - rightPhase_ += 3; - if (rightPhase_ >= tableSize_) - rightPhase_ -= tableSize_; - } - - return paContinue; - } - -private: - float *table_; - int tableSize_; - int leftPhase_; - int rightPhase_; -}; - -// --------------------------------------------------------------------------------------- - -// main: -int main(int, char *[]); -int main(int, char *[]) -{ - try - { - // Create a SineGenerator object: - SineGenerator sineGenerator(TABLE_SIZE); - - std::cout << "Setting up PortAudio..." << std::endl; - - // Set up the System: - portaudio::AutoSystem autoSys; - portaudio::System &sys = portaudio::System::instance(); - - // Set up the parameters required to open a (Callback)Stream: - portaudio::DirectionSpecificStreamParameters outParams(sys.defaultOutputDevice(), 2, portaudio::FLOAT32, false, sys.defaultOutputDevice().defaultLowOutputLatency(), NULL); - portaudio::StreamParameters params(portaudio::DirectionSpecificStreamParameters::null(), outParams, SAMPLE_RATE, FRAMES_PER_BUFFER, paClipOff); - - std::cout << "Opening stereo output stream..." << std::endl; - - // Create (and open) a new Stream, using the SineGenerator::generate function as a callback: - portaudio::MemFunCallbackStream<SineGenerator> stream(params, sineGenerator, &SineGenerator::generate); - - std::cout << "Starting playback for " << NUM_SECONDS << " seconds." << std::endl; - - // Start the Stream (audio playback starts): - stream.start(); - - // Wait for 5 seconds: - sys.sleep(NUM_SECONDS * 1000); - - std::cout << "Closing stream..." <<std::endl; - - // Stop the Stream (not strictly needed as termintating the System will also stop all open Streams): - stream.stop(); - - // Close the Stream (not strictly needed as terminating the System will also close all open Streams): - stream.close(); - - // Terminate the System (not strictly needed as the AutoSystem will also take care of this when it - // goes out of scope): - sys.terminate(); - - std::cout << "Test finished." << std::endl; - } - catch (const portaudio::PaException &e) - { - std::cout << "A PortAudio error occurred: " << e.paErrorText() << std::endl; - } - catch (const portaudio::PaCppException &e) - { - std::cout << "A PortAudioCpp error occurred: " << e.what() << std::endl; - } - catch (const std::exception &e) - { - std::cout << "A generic exception occurred: " << e.what() << std::endl; - } - catch (...) - { - std::cout << "An unknown exception occurred." << std::endl; - } - - return 0; -} - - |