Mercurial > hg > svcore
view base/AudioPlaySource.h @ 40:b2d1a61ab916
* A bit more work on main window / document / commands stuff. This is still
pretty unstable.
* Enable CSV file reader also to read files with other separators (e.g. .lab
files with space separators)
* Show "(R)" on waveform display when resampling during playback
* Add ability to import additional audio files (can't process them yet)
* Fixes to spectrogram cache for multiple views
* Fix to avoid floating-point exception in sparse model when resolution not
set yet
author | Chris Cannam |
---|---|
date | Mon, 06 Mar 2006 17:20:25 +0000 |
parents | 070e9e1e40ea |
children | 39ae3dee27b9 |
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/* -*- c-basic-offset: 4 -*- vi:set ts=8 sts=4 sw=4: */ /* A waveform viewer and audio annotation editor. Chris Cannam, Queen Mary University of London, 2005-2006 This is experimental software. Not for distribution. */ #ifndef _AUDIO_PLAY_SOURCE_H_ #define _AUDIO_PLAY_SOURCE_H_ /** * Simple interface for audio playback. This should be all that the * ViewManager needs to know about to synchronise with playback by * sample frame, but it doesn't provide enough to determine what is * actually being played or how. See the audioio directory for a * concrete subclass. */ class AudioPlaySource { public: virtual ~AudioPlaySource() { } /** * Start playing from the given frame. If playback is already * under way, reseek to the given frame and continue. */ virtual void play(size_t startFrame) = 0; /** * Stop playback. */ virtual void stop() = 0; /** * Return whether playback is currently supposed to be happening. */ virtual bool isPlaying() const = 0; /** * Return the frame number that is currently expected to be coming * out of the speakers. (i.e. compensating for playback latency.) */ virtual size_t getCurrentPlayingFrame() = 0; /** * Return the current (or thereabouts) output levels in the range * 0.0 -> 1.0, for metering purposes. */ virtual bool getOutputLevels(float &left, float &right) = 0; /** * Return the sample rate set by the target audio device (or the * source sample rate if the target hasn't set one). */ virtual size_t getTargetSampleRate() const = 0; }; #endif