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Audio Frame (audioframe)

The basic unit for transferring audio data.

Structure​

struct audio_frame_t {
    int rate;         /* Sample rate (Hz) */
    int channel;      /* Number of channels */
    int frames;       /* Number of frames (~5ms audio data) */
    float * samples;  /* Interleaved sample data */
};

Helper Functions​

FunctionDescription
audio_frame_is_valid(af)Check if audio frame is valid
audio_frame_total_time(af)Get total duration of audio frame (ms)
volume_to_factor(volume)Convert volume [0,1000] to factor [-50db,0db]
factor_to_volume(factor)Convert factor to volume [0,1000]

Notes​

The audio frame is the basic unit for transferring data in the audio processing pipeline. samples is float-type interleaved data (e.g., stereo is L/R/L/R...). frames typically corresponds to approximately 5ms of audio data.