Expand description
Audio buffers.
Some audio concepts
A sample is a single number representing the air pressure at a given time.
It is usually represented by an f32, f64, i16 or i32 number, but other
types are possible as well.
A channel usually corresponds with a speaker or a number of speakers. E.g. in a stereo setup, there is a “left” channel and a “right” channel.
A frame consists of the samples for all the channels at a given time.
A buffer consists of subsequent samples for a given channel and corresponds to a certain time period. (Non-standard terminology.)
A chunk consists of the buffers for all channels for a given time period. (Non-standard terminology.)
┌ chunk ┌ frame
┌ sample ↓ ↓
│ ┌─────────┐ ┌─┐
┌──↓──────┼─────────┼─────┼─┼───────────────────┐
channel →│• • • • •│• • • • •│• • •│•│• • • • • • • • • •│
└─────────┼─────────┼─────┼─┼───────────────────┘
• • • • •│• • • • •│• • •│•│• • • • • • • • • •
│ │ │ │ ┌───────┐
• • • • •│• • • • •│• • •│•│• •│• • • •│• • • •
└─────────┘ └─┘ └───────┘
↑
└ buffer
Structs
- Audio input buffer
- A buffer holding both input and output audio.
- An audio output buffer.