diff options
Diffstat (limited to '3rdparty/portaudio/bindings/cpp/example/sine.cxx')
-rw-r--r-- | 3rdparty/portaudio/bindings/cpp/example/sine.cxx | 206 |
1 files changed, 102 insertions, 104 deletions
diff --git a/3rdparty/portaudio/bindings/cpp/example/sine.cxx b/3rdparty/portaudio/bindings/cpp/example/sine.cxx index 0676e3e76ca..acd01e613b1 100644 --- a/3rdparty/portaudio/bindings/cpp/example/sine.cxx +++ b/3rdparty/portaudio/bindings/cpp/example/sine.cxx @@ -20,50 +20,50 @@ const int TABLE_SIZE = 200; 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; - } + 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_; + float *table_; + int tableSize_; + int leftPhase_; + int rightPhase_; }; // --------------------------------------------------------------------------------------- @@ -72,66 +72,64 @@ private: 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 occured: " << e.paErrorText() << std::endl; - } - catch (const portaudio::PaCppException &e) - { - std::cout << "A PortAudioCpp error occured: " << e.what() << std::endl; - } - catch (const std::exception &e) - { - std::cout << "A generic exception occured: " << e.what() << std::endl; - } - catch (...) - { - std::cout << "An unknown exception occured." << std::endl; - } - - return 0; + 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; } - - |