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feature: Add 2.5 ms and 5 ms LC3 plus frame durations

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fix: Check TNS bitstream data

fix: LTPF Activation with 2.5 ms frame sizes
This commit is contained in:
anonymix007
2023-12-13 10:56:20 -08:00
committed by Antoine Soulier
parent a75f187e00
commit 149cb6537e
43 changed files with 3095 additions and 1628 deletions
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39
include/lc3_private.h
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@@ -25,46 +25,55 @@
/**
* Return number of samples, delayed samples and
* encoded spectrum coefficients within a frame
* - For encoding, keep 1.25 ms of temporal winodw
* encoded spectrum coefficients within a frame.
*
* - The number of MDCT delayed samples is the sum of half a frame and
* an ovelap of future by 1.25 ms (2.5ms, 5ms and 10ms frame durations)
* or 2 ms (7.5ms frame duration).
*
* - For encoding, keep 1.25 ms of temporal previous samples
* - For decoding, keep 18 ms of history, aligned on frames, and a frame
*/
#define __LC3_NS(dt_us, sr_hz) \
( (dt_us * sr_hz) / 1000 / 1000 )
( (dt_us) * (sr_hz) / 1000 / 1000 )
#define __LC3_ND(dt_us, sr_hz) \
( (dt_us) == 7500 ? 23 * __LC3_NS(dt_us, sr_hz) / 30 \
: 5 * __LC3_NS(dt_us, sr_hz) / 8 )
( __LC3_NS(dt_us, sr_hz) / 2 + \
__LC3_NS((dt_us) == 7500 ? 2000 : 1250, sr_hz) )
#define __LC3_NT(sr_hz) \
( (5 * sr_hz) / 4000 )
( __LC3_NS(1250, sr_hz) )
#define __LC3_NH(dt_us, sr_hz) \
( ((3 - ((dt_us) >= 10000)) + 1) * __LC3_NS(dt_us, sr_hz) )
( __LC3_NS(18000, sr_hz) + 2*__LC3_NS(dt_us, sr_hz) - \
(__LC3_NS(18000, sr_hz) % __LC3_NS(dt_us, sr_hz)) )
/**
* Frame duration 7.5ms or 10ms
* Frame duration
*/
enum lc3_dt {
LC3_DT_7M5,
LC3_DT_10M,
LC3_DT_2M5 = 0,
LC3_DT_5M = 1,
LC3_DT_7M5 = 2,
LC3_DT_10M = 3,
LC3_NUM_DT
};
/**
* Sampling frequency
*/
enum lc3_srate {
LC3_SRATE_8K,
LC3_SRATE_16K,
LC3_SRATE_24K,
LC3_SRATE_32K,
LC3_SRATE_48K,
LC3_SRATE_8K = 0,
LC3_SRATE_16K = 1,
LC3_SRATE_24K = 2,
LC3_SRATE_32K = 3,
LC3_SRATE_48K = 4,
LC3_NUM_SRATE,
};