Mercurial > hg > beaglert
changeset 179:f1012082f142
Added audioReadFrame() and audioWriteFrame(). Closes #1519
| author | Giulio Moro <giuliomoro@yahoo.it> |
|---|---|
| date | Sat, 02 Jan 2016 13:50:36 +0100 |
| parents | a156a694864d |
| children | 07cfd337ad18 |
| files | core/Utilities.cpp include/Utilities.h |
| diffstat | 2 files changed, 45 insertions(+), 1 deletions(-) [+] |
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--- a/core/Utilities.cpp Sat Jan 02 13:08:39 2016 +0100 +++ b/core/Utilities.cpp Sat Jan 02 13:50:36 2016 +0100 @@ -7,6 +7,20 @@ #include "../include/Utilities.h" +// audioReadFrame() +// +// Returns the value of the given audio input at the given frame number. +float audioReadFrame(BeagleRTContext *context, int frame, int channel) { + return context->audioIn[frame * context->audioChannels + channel]; +} + +// audioWriteFrame() +// +// Sets a given audio output channel to a value for the current frame +void audioWriteFrame(BeagleRTContext *context, int frame, int channel, float value) { + context->audioOut[frame * context->audioChannels + channel] = value; +} + // analogReadFrame() // // Returns the value of the given analog input at the given frame number. @@ -16,7 +30,7 @@ // analogWriteFrame() // -// Sets a given channel to a value for the current frame and, if persistent outputs are +// Sets a given analog output channel to a value for the current frame and, if persistent outputs are // enabled, for all subsequent frames void analogWriteFrame(BeagleRTContext *context, int frame, int channel, float value) { if(context->flags & BEAGLERT_FLAG_ANALOG_OUTPUTS_PERSIST) {
--- a/include/Utilities.h Sat Jan 02 13:08:39 2016 +0100 +++ b/include/Utilities.h Sat Jan 02 13:50:36 2016 +0100 @@ -71,6 +71,36 @@ // Also, make volume change functions callable from render() thread -- as an aux task? /** + * \brief Read an audio input, specifying the frame number (when to read) and the channel. + * + * This function returns the value of an audio input, at the time indicated by \c frame. + * The returned value ranges from -1 to 1. + * + * \param context The I/O data structure which is passed by BeagleRT to render(). + * \param frame Which frame (i.e. what time) to read the audio input. Valid values range + * from 0 to (context->audioFrames - 1). + * \param channel Which audio input to read. Valid values are between 0 and + * (context->audioChannels - 1), typically 0 to 1 by default. + * \return Value of the analog input, range to 1. + */ +float audioReadFrame(BeagleRTContext *context, int frame, int channel); + +/** + * \brief Write an audio output, specifying the frame number (when to write) and the channel. + * + * This function sets the value of an audio output, at the time indicated by \c frame. Valid + * values are between -1 and 1. + * + * \param context The I/O data structure which is passed by BeagleRT to render(). + * \param frame Which frame (i.e. what time) to write the audio output. Valid values range + * from 0 to (context->audioFrames - 1). + * \param channel Which analog output to write. Valid values are between 0 and + * (context->audioChannels - 1), typically 0 to 1 by default. + * \param value Value to write to the output, range -1 to 1. + */ +void audioWriteFrame(BeagleRTContext *context, int frame, int channel, float value); + +/** * \brief Read an analog input, specifying the frame number (when to read) and the channel. * * This function returns the value of an analog input, at the time indicated by \c frame.