Function rsmpeg::ffi::av_rescale_delta

pub unsafe extern "C" fn av_rescale_delta(
    in_tb: AVRational, 
    in_ts: i64, 
    fs_tb: AVRational, 
    duration: i32, 
    last: *mut i64, 
    out_tb: AVRational
) -> i64

Rescale a timestamp while preserving known durations.

This function is designed to be called per audio packet to scale the input timestamp to a different time base. Compared to a simple av_rescale_q() call, this function is robust against possible inconsistent frame durations.

The last parameter is a state variable that must be preserved for all subsequent calls for the same stream. For the first call, *last should be initialized to #AV_NOPTS_VALUE.

@param[in] in_tb Input time base @param[in] in_ts Input timestamp @param[in] fs_tb Duration time base; typically this is finer-grained (greater) than in_tb and out_tb @param[in] duration Duration till the next call to this function (i.e. duration of the current packet/frame) @param[in,out] last Pointer to a timestamp expressed in terms of fs_tb, acting as a state variable @param[in] out_tb Output timebase @return Timestamp expressed in terms of out_tb

@note In the context of this function, “duration” is in term of samples, not seconds.