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feature: Add High-Resolution LC3 plus mode

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Duplicate interfaces for HR mode

spec: Remove intermediate quantized table

fix: legacy lc3_frame_bytes() and lc3_resolve_bitrate()

Cosmetic: rename fast_xxx math function to lc3_xxx
This commit is contained in:
Antoine Soulier
2023-12-21 15:42:08 -08:00
parent 149cb6537e
commit daa580235e
46 changed files with 4518 additions and 1149 deletions
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include/lc3_private.h
+28 -24
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@@ -24,30 +24,32 @@
/**
* Return number of samples, delayed samples and
* encoded spectrum coefficients within a frame.
* Characteristics
*
* - The number of MDCT delayed samples is the sum of half a frame and
* - The number of samples within a frame
*
* - The number of MDCT delayed samples, 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 decoding, keep 18 ms of history, aligned on a frame
*
* - 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) \
#define LC3_NS(dt_us, sr_hz) \
( (dt_us) * (sr_hz) / 1000 / 1000 )
#define __LC3_ND(dt_us, sr_hz) \
( __LC3_NS(dt_us, sr_hz) / 2 + \
__LC3_NS((dt_us) == 7500 ? 2000 : 1250, sr_hz) )
#define LC3_ND(dt_us, sr_hz) \
( LC3_NS(dt_us, sr_hz) / 2 + \
LC3_NS((dt_us) == 7500 ? 2000 : 1250, sr_hz) )
#define __LC3_NT(sr_hz) \
( __LC3_NS(1250, sr_hz) )
#define LC3_NH(dt_us, sr_hz) \
( (sr_hz) > 48000 ? 0 : ( LC3_NS(18000, sr_hz) + \
LC3_NS(dt_us, sr_hz) - (LC3_NS(18000, sr_hz) % LC3_NS(dt_us, sr_hz)) ) )
#define __LC3_NH(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)) )
#define LC3_NT(sr_hz) \
( LC3_NS(1250, sr_hz) )
/**
@@ -65,17 +67,19 @@ enum lc3_dt {
/**
* Sampling frequency
* Sampling frequency and high-resolution mode
*/
enum lc3_srate {
LC3_SRATE_8K = 0,
LC3_SRATE_16K = 1,
LC3_SRATE_24K = 2,
LC3_SRATE_32K = 3,
LC3_SRATE_48K = 4,
LC3_SRATE_8K,
LC3_SRATE_16K,
LC3_SRATE_24K,
LC3_SRATE_32K,
LC3_SRATE_48K,
LC3_SRATE_48K_HR,
LC3_SRATE_96K_HR,
LC3_NUM_SRATE,
LC3_NUM_SRATE
};
@@ -121,8 +125,8 @@ struct lc3_encoder {
};
#define LC3_ENCODER_BUFFER_COUNT(dt_us, sr_hz) \
( ( __LC3_NS(dt_us, sr_hz) + __LC3_NT(sr_hz) ) / 2 + \
__LC3_NS(dt_us, sr_hz) + __LC3_ND(dt_us, sr_hz) )
( ( LC3_NS(dt_us, sr_hz) + LC3_NT(sr_hz) ) / 2 + \
LC3_NS(dt_us, sr_hz) + LC3_ND(dt_us, sr_hz) )
#define LC3_ENCODER_MEM_T(dt_us, sr_hz) \
struct { \
@@ -159,8 +163,8 @@ struct lc3_decoder {
};
#define LC3_DECODER_BUFFER_COUNT(dt_us, sr_hz) \
( __LC3_NH(dt_us, sr_hz) + __LC3_ND(dt_us, sr_hz) + \
__LC3_NS(dt_us, sr_hz) )
( LC3_NH(dt_us, sr_hz) + LC3_NS(dt_us, sr_hz) + \
LC3_ND(dt_us, sr_hz) + LC3_NS(dt_us, sr_hz) )
#define LC3_DECODER_MEM_T(dt_us, sr_hz) \
struct { \