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mdct: work on 2 input buffers, and remove 1 encoding buffer

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Antoine SOULIER
2022-05-05 13:54:50 +02:00
parent 0cec73a6fb
commit 3568ee1cbf
8 changed files with 63 additions and 63 deletions
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10
src/mdct.h
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@@ -33,15 +33,13 @@
* Forward MDCT transformation
* dt, sr Duration and samplerate (size of the transform)
* sr_dst Samplerate destination, scale transforam accordingly
* x [-nd..-1] Previous, [0..ns-1] Current samples
* y Output `ns` frequency coefficients
* x, d Temporal samples and delayed buffer
* y, d Output `ns` coefficients and `nd` delayed samples
*
* The number of previous samples `nd` accessed on `x` is :
* nd: `ns` * 23/30 for 7.5ms frame duration
* nd: `ns` * 5/ 8 for 10ms frame duration
* `x` and `y` can be the same buffer
*/
void lc3_mdct_forward(enum lc3_dt dt, enum lc3_srate sr,
enum lc3_srate sr_dst, const float *x, float *y);
enum lc3_srate sr_dst, const float *x, float *d, float *y);
/**
* Inverse MDCT transformation