//- LISP API - // playback-set-file (string)fileName -> t/nil base::cell_t set_file(base::lisp &gl, base::cell_t c, base::cells_t &) { if (base::lisp::validate(c, base::cell::list(1), base::cell::typeString)) { const auto &fname = c + 1; // stop current playback ts.stop(); ts.setSource(nullptr); frs = nullptr; AudioFormatReader *r; // ectract CUE information (if any) std::regex cue("^(.*):(\\d+):(\\d+)$"); std::smatch result; std::regex_search(fname->s, result, cue); if (result.size() == 4) { // is cue int32 start = base::fromStr<int32>(result[2].str()); int32 end = base::fromStr<int32>(result[3].str()); int32 duration = end - start; AudioFormatReader *tr = fm.createReaderFor(File(result[1].str())); // start, end are in frames (1 frame = 1/75 second) - convert to sample float samplesInOneSecond = tr->sampleRate; // AudioSubsectionReader will handle channels count float startSecond = (float)start / 75.0f; float durationSecond = (float)duration / 75.0f; float startSample = startSecond * samplesInOneSecond; float durationSamples = durationSecond * samplesInOneSecond; // some CUE may have 0 length (play to end) if (end <= start) durationSamples = tr->lengthInSamples; r = new AudioSubsectionReader(tr, (int)startSample, (int)durationSamples, true); } else { // regular file r = fm.createReaderFor(File(fname->s)); } if (r) { frs = new AudioFormatReaderSource(r, true); ts.setSource(frs, 32768, &thread, r->sampleRate); return gl.t(); } gl.signalError(base::strs("file not found or file format not supported: ", fname->s)); return gl.nil(); } gl.signalError("playback-set-file: invalid arguments, expected (string)"); return gl.nil(); }
void buttonClicked (Button* buttonThatWasClicked) override { if (buttonThatWasClicked == &startStopButton) { if (transportSource.isPlaying()) { transportSource.stop(); } else { transportSource.setPosition (0); transportSource.start(); } } else if (buttonThatWasClicked == &followTransportButton) { thumbnail->setFollowsTransport (followTransportButton.getToggleState()); } }
void loadFileIntoTransport (const File& audioFile) { // unload the previous file source and delete it.. transportSource.stop(); transportSource.setSource (nullptr); currentAudioFileSource = nullptr; AudioFormatReader* reader = formatManager.createReaderFor (audioFile); if (reader != nullptr) { currentAudioFileSource = new AudioFormatReaderSource (reader, true); // ..and plug it into our transport source transportSource.setSource (currentAudioFileSource, 32768, // tells it to buffer this many samples ahead &thread, // this is the background thread to use for reading-ahead reader->sampleRate); // allows for sample rate correction } }
//- LISP API - // playback-set-file (string)fileName -> t/nil base::cell_t set_file(base::lisp &gl, base::cell_t c, base::cells_t &) { if (base::lisp::validate(c, base::cell::list(1), base::cell::typeString)) { const auto &fname = c + 1; // stop current playback ts.stop(); ts.setSource(nullptr); frs = nullptr; AudioFormatReader *r; // ectract CUE information (if any) std::regex cue("^(.*):(\\d+):(\\d+)$"); std::smatch result; std::regex_search(fname->s, result, cue); if (result.size() == 4) { // is cue int32 start = base::fromStr<int32>(result[2].str()); int32 end = base::fromStr<int32>(result[3].str()); AudioFormatReader *tr = fm.createReaderFor(File(result[1].str())); r = new AudioSubsectionReader(tr, start, end - start, true); } else { // regular file r = fm.createReaderFor(File(fname->s)); } if (r) { frs = new AudioFormatReaderSource(r, true); ts.setSource(frs, 32768, &thread, r->sampleRate); return gl.t(); } gl.signalError(base::strs("file not found or file format not supported: ", fname->s)); return gl.nil(); } gl.signalError("playback-set-file: invalid arguments, expected (string)"); return gl.nil(); }
// playback-stop base::cell_t stop(base::lisp &gl, base::cell_t, base::cells_t &) { ts.stop(); return gl.nil(); }
// playback-unload-file base::cell_t unload_file(base::lisp &gl, base::cell_t, base::cells_t &) { ts.stop(); ts.setSource(nullptr); frs = nullptr; return gl.nil(); }