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feature: Add High-Resolution LC3 plus mode
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
226
src/sns.c
226
src/sns.c
@@ -146,108 +146,139 @@ LC3_HOT static void dct16_inverse(const float *x, float *y)
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/**
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* Scale factors
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* dt, sr Duration and samplerate of the frame
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* nbytes Size in bytes of the frame
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* eb Energy estimation per bands
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* att 1: Attack detected 0: Otherwise
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* scf Output 16 scale factors
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*/
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LC3_HOT static void compute_scale_factors(
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enum lc3_dt dt, enum lc3_srate sr,
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enum lc3_dt dt, enum lc3_srate sr, int nbytes,
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const float *eb, bool att, float *scf)
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{
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/* Pre-emphasis gain table :
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* Ge[b] = 10 ^ (b * g_tilt) / 630 , b = [0..63] */
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static const float ge_table[LC3_NUM_SRATE][LC3_MAX_BANDS] = {
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static const float ge_14[LC3_MAX_BANDS] = { /* g_tilt = 14 */
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1.00000000e+00, 1.05250029e+00, 1.10775685e+00, 1.16591440e+00,
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1.22712524e+00, 1.29154967e+00, 1.35935639e+00, 1.43072299e+00,
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1.50583635e+00, 1.58489319e+00, 1.66810054e+00, 1.75567629e+00,
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1.84784980e+00, 1.94486244e+00, 2.04696827e+00, 2.15443469e+00,
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2.26754313e+00, 2.38658979e+00, 2.51188643e+00, 2.64376119e+00,
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2.78255940e+00, 2.92864456e+00, 3.08239924e+00, 3.24422608e+00,
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3.41454887e+00, 3.59381366e+00, 3.78248991e+00, 3.98107171e+00,
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4.19007911e+00, 4.41005945e+00, 4.64158883e+00, 4.88527357e+00,
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5.14175183e+00, 5.41169527e+00, 5.69581081e+00, 5.99484250e+00,
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6.30957344e+00, 6.64082785e+00, 6.98947321e+00, 7.35642254e+00,
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7.74263683e+00, 8.14912747e+00, 8.57695899e+00, 9.02725178e+00,
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9.50118507e+00, 1.00000000e+01, 1.05250029e+01, 1.10775685e+01,
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1.16591440e+01, 1.22712524e+01, 1.29154967e+01, 1.35935639e+01,
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1.43072299e+01, 1.50583635e+01, 1.58489319e+01, 1.66810054e+01,
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1.75567629e+01, 1.84784980e+01, 1.94486244e+01, 2.04696827e+01,
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2.15443469e+01, 2.26754313e+01, 2.38658979e+01, 2.51188643e+01 };
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[LC3_SRATE_8K] = { /* g_tilt = 14 */
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1.00000000e+00, 1.05250029e+00, 1.10775685e+00, 1.16591440e+00,
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1.22712524e+00, 1.29154967e+00, 1.35935639e+00, 1.43072299e+00,
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1.50583635e+00, 1.58489319e+00, 1.66810054e+00, 1.75567629e+00,
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1.84784980e+00, 1.94486244e+00, 2.04696827e+00, 2.15443469e+00,
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2.26754313e+00, 2.38658979e+00, 2.51188643e+00, 2.64376119e+00,
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2.78255940e+00, 2.92864456e+00, 3.08239924e+00, 3.24422608e+00,
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3.41454887e+00, 3.59381366e+00, 3.78248991e+00, 3.98107171e+00,
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4.19007911e+00, 4.41005945e+00, 4.64158883e+00, 4.88527357e+00,
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5.14175183e+00, 5.41169527e+00, 5.69581081e+00, 5.99484250e+00,
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6.30957344e+00, 6.64082785e+00, 6.98947321e+00, 7.35642254e+00,
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7.74263683e+00, 8.14912747e+00, 8.57695899e+00, 9.02725178e+00,
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9.50118507e+00, 1.00000000e+01, 1.05250029e+01, 1.10775685e+01,
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1.16591440e+01, 1.22712524e+01, 1.29154967e+01, 1.35935639e+01,
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1.43072299e+01, 1.50583635e+01, 1.58489319e+01, 1.66810054e+01,
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1.75567629e+01, 1.84784980e+01, 1.94486244e+01, 2.04696827e+01,
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2.15443469e+01, 2.26754313e+01, 2.38658979e+01, 2.51188643e+01 },
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static const float ge_18[LC3_MAX_BANDS] = { /* g_tilt = 18 */
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1.00000000e+00, 1.06800043e+00, 1.14062492e+00, 1.21818791e+00,
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1.30102522e+00, 1.38949549e+00, 1.48398179e+00, 1.58489319e+00,
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1.69266662e+00, 1.80776868e+00, 1.93069773e+00, 2.06198601e+00,
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2.20220195e+00, 2.35195264e+00, 2.51188643e+00, 2.68269580e+00,
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2.86512027e+00, 3.05994969e+00, 3.26802759e+00, 3.49025488e+00,
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3.72759372e+00, 3.98107171e+00, 4.25178630e+00, 4.54090961e+00,
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4.84969343e+00, 5.17947468e+00, 5.53168120e+00, 5.90783791e+00,
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6.30957344e+00, 6.73862717e+00, 7.19685673e+00, 7.68624610e+00,
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8.20891416e+00, 8.76712387e+00, 9.36329209e+00, 1.00000000e+01,
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1.06800043e+01, 1.14062492e+01, 1.21818791e+01, 1.30102522e+01,
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1.38949549e+01, 1.48398179e+01, 1.58489319e+01, 1.69266662e+01,
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1.80776868e+01, 1.93069773e+01, 2.06198601e+01, 2.20220195e+01,
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2.35195264e+01, 2.51188643e+01, 2.68269580e+01, 2.86512027e+01,
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3.05994969e+01, 3.26802759e+01, 3.49025488e+01, 3.72759372e+01,
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3.98107171e+01, 4.25178630e+01, 4.54090961e+01, 4.84969343e+01,
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5.17947468e+01, 5.53168120e+01, 5.90783791e+01, 6.30957344e+01 };
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[LC3_SRATE_16K] = { /* g_tilt = 18 */
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1.00000000e+00, 1.06800043e+00, 1.14062492e+00, 1.21818791e+00,
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1.30102522e+00, 1.38949549e+00, 1.48398179e+00, 1.58489319e+00,
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1.69266662e+00, 1.80776868e+00, 1.93069773e+00, 2.06198601e+00,
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2.20220195e+00, 2.35195264e+00, 2.51188643e+00, 2.68269580e+00,
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2.86512027e+00, 3.05994969e+00, 3.26802759e+00, 3.49025488e+00,
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3.72759372e+00, 3.98107171e+00, 4.25178630e+00, 4.54090961e+00,
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4.84969343e+00, 5.17947468e+00, 5.53168120e+00, 5.90783791e+00,
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6.30957344e+00, 6.73862717e+00, 7.19685673e+00, 7.68624610e+00,
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8.20891416e+00, 8.76712387e+00, 9.36329209e+00, 1.00000000e+01,
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1.06800043e+01, 1.14062492e+01, 1.21818791e+01, 1.30102522e+01,
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1.38949549e+01, 1.48398179e+01, 1.58489319e+01, 1.69266662e+01,
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1.80776868e+01, 1.93069773e+01, 2.06198601e+01, 2.20220195e+01,
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2.35195264e+01, 2.51188643e+01, 2.68269580e+01, 2.86512027e+01,
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3.05994969e+01, 3.26802759e+01, 3.49025488e+01, 3.72759372e+01,
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3.98107171e+01, 4.25178630e+01, 4.54090961e+01, 4.84969343e+01,
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5.17947468e+01, 5.53168120e+01, 5.90783791e+01, 6.30957344e+01 },
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static const float ge_22[LC3_MAX_BANDS] = { /* g_tilt = 22 */
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1.00000000e+00, 1.08372885e+00, 1.17446822e+00, 1.27280509e+00,
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1.37937560e+00, 1.49486913e+00, 1.62003281e+00, 1.75567629e+00,
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1.90267705e+00, 2.06198601e+00, 2.23463373e+00, 2.42173704e+00,
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2.62450630e+00, 2.84425319e+00, 3.08239924e+00, 3.34048498e+00,
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3.62017995e+00, 3.92329345e+00, 4.25178630e+00, 4.60778348e+00,
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4.99358789e+00, 5.41169527e+00, 5.86481029e+00, 6.35586411e+00,
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6.88803330e+00, 7.46476041e+00, 8.08977621e+00, 8.76712387e+00,
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9.50118507e+00, 1.02967084e+01, 1.11588399e+01, 1.20931568e+01,
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1.31057029e+01, 1.42030283e+01, 1.53922315e+01, 1.66810054e+01,
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1.80776868e+01, 1.95913107e+01, 2.12316686e+01, 2.30093718e+01,
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2.49359200e+01, 2.70237760e+01, 2.92864456e+01, 3.17385661e+01,
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3.43959997e+01, 3.72759372e+01, 4.03970086e+01, 4.37794036e+01,
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4.74450028e+01, 5.14175183e+01, 5.57226480e+01, 6.03882412e+01,
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6.54444792e+01, 7.09240702e+01, 7.68624610e+01, 8.32980665e+01,
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9.02725178e+01, 9.78309319e+01, 1.06022203e+02, 1.14899320e+02,
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1.24519708e+02, 1.34945600e+02, 1.46244440e+02, 1.58489319e+02 };
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[LC3_SRATE_24K] = { /* g_tilt = 22 */
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1.00000000e+00, 1.08372885e+00, 1.17446822e+00, 1.27280509e+00,
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1.37937560e+00, 1.49486913e+00, 1.62003281e+00, 1.75567629e+00,
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1.90267705e+00, 2.06198601e+00, 2.23463373e+00, 2.42173704e+00,
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2.62450630e+00, 2.84425319e+00, 3.08239924e+00, 3.34048498e+00,
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3.62017995e+00, 3.92329345e+00, 4.25178630e+00, 4.60778348e+00,
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4.99358789e+00, 5.41169527e+00, 5.86481029e+00, 6.35586411e+00,
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6.88803330e+00, 7.46476041e+00, 8.08977621e+00, 8.76712387e+00,
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9.50118507e+00, 1.02967084e+01, 1.11588399e+01, 1.20931568e+01,
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1.31057029e+01, 1.42030283e+01, 1.53922315e+01, 1.66810054e+01,
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1.80776868e+01, 1.95913107e+01, 2.12316686e+01, 2.30093718e+01,
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2.49359200e+01, 2.70237760e+01, 2.92864456e+01, 3.17385661e+01,
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3.43959997e+01, 3.72759372e+01, 4.03970086e+01, 4.37794036e+01,
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4.74450028e+01, 5.14175183e+01, 5.57226480e+01, 6.03882412e+01,
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6.54444792e+01, 7.09240702e+01, 7.68624610e+01, 8.32980665e+01,
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9.02725178e+01, 9.78309319e+01, 1.06022203e+02, 1.14899320e+02,
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1.24519708e+02, 1.34945600e+02, 1.46244440e+02, 1.58489319e+02 },
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static const float ge_26[LC3_MAX_BANDS] = { /* g_tilt = 26 */
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1.00000000e+00, 1.09968890e+00, 1.20931568e+00, 1.32987103e+00,
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1.46244440e+00, 1.60823388e+00, 1.76855694e+00, 1.94486244e+00,
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2.13874364e+00, 2.35195264e+00, 2.58641621e+00, 2.84425319e+00,
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3.12779366e+00, 3.43959997e+00, 3.78248991e+00, 4.15956216e+00,
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4.57422434e+00, 5.03022373e+00, 5.53168120e+00, 6.08312841e+00,
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6.68954879e+00, 7.35642254e+00, 8.08977621e+00, 8.89623710e+00,
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9.78309319e+00, 1.07583590e+01, 1.18308480e+01, 1.30102522e+01,
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1.43072299e+01, 1.57335019e+01, 1.73019574e+01, 1.90267705e+01,
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2.09235283e+01, 2.30093718e+01, 2.53031508e+01, 2.78255940e+01,
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3.05994969e+01, 3.36499270e+01, 3.70044512e+01, 4.06933843e+01,
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4.47500630e+01, 4.92111475e+01, 5.41169527e+01, 5.95118121e+01,
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6.54444792e+01, 7.19685673e+01, 7.91430346e+01, 8.70327166e+01,
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9.57089124e+01, 1.05250029e+02, 1.15742288e+02, 1.27280509e+02,
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1.39968963e+02, 1.53922315e+02, 1.69266662e+02, 1.86140669e+02,
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2.04696827e+02, 2.25102829e+02, 2.47543082e+02, 2.72220379e+02,
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2.99357729e+02, 3.29200372e+02, 3.62017995e+02, 3.98107171e+02 };
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[LC3_SRATE_32K] = { /* g_tilt = 26 */
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1.00000000e+00, 1.09968890e+00, 1.20931568e+00, 1.32987103e+00,
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1.46244440e+00, 1.60823388e+00, 1.76855694e+00, 1.94486244e+00,
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2.13874364e+00, 2.35195264e+00, 2.58641621e+00, 2.84425319e+00,
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3.12779366e+00, 3.43959997e+00, 3.78248991e+00, 4.15956216e+00,
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4.57422434e+00, 5.03022373e+00, 5.53168120e+00, 6.08312841e+00,
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6.68954879e+00, 7.35642254e+00, 8.08977621e+00, 8.89623710e+00,
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9.78309319e+00, 1.07583590e+01, 1.18308480e+01, 1.30102522e+01,
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1.43072299e+01, 1.57335019e+01, 1.73019574e+01, 1.90267705e+01,
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2.09235283e+01, 2.30093718e+01, 2.53031508e+01, 2.78255940e+01,
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3.05994969e+01, 3.36499270e+01, 3.70044512e+01, 4.06933843e+01,
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4.47500630e+01, 4.92111475e+01, 5.41169527e+01, 5.95118121e+01,
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6.54444792e+01, 7.19685673e+01, 7.91430346e+01, 8.70327166e+01,
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9.57089124e+01, 1.05250029e+02, 1.15742288e+02, 1.27280509e+02,
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1.39968963e+02, 1.53922315e+02, 1.69266662e+02, 1.86140669e+02,
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2.04696827e+02, 2.25102829e+02, 2.47543082e+02, 2.72220379e+02,
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2.99357729e+02, 3.29200372e+02, 3.62017995e+02, 3.98107171e+02 },
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static const float ge_30[LC3_MAX_BANDS] = { /* g_tilt = 30 */
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1.00000000e+00, 1.11588399e+00, 1.24519708e+00, 1.38949549e+00,
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1.55051578e+00, 1.73019574e+00, 1.93069773e+00, 2.15443469e+00,
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2.40409918e+00, 2.68269580e+00, 2.99357729e+00, 3.34048498e+00,
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3.72759372e+00, 4.15956216e+00, 4.64158883e+00, 5.17947468e+00,
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5.77969288e+00, 6.44946677e+00, 7.19685673e+00, 8.03085722e+00,
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8.96150502e+00, 1.00000000e+01, 1.11588399e+01, 1.24519708e+01,
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1.38949549e+01, 1.55051578e+01, 1.73019574e+01, 1.93069773e+01,
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2.15443469e+01, 2.40409918e+01, 2.68269580e+01, 2.99357729e+01,
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3.34048498e+01, 3.72759372e+01, 4.15956216e+01, 4.64158883e+01,
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5.17947468e+01, 5.77969288e+01, 6.44946677e+01, 7.19685673e+01,
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8.03085722e+01, 8.96150502e+01, 1.00000000e+02, 1.11588399e+02,
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1.24519708e+02, 1.38949549e+02, 1.55051578e+02, 1.73019574e+02,
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1.93069773e+02, 2.15443469e+02, 2.40409918e+02, 2.68269580e+02,
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2.99357729e+02, 3.34048498e+02, 3.72759372e+02, 4.15956216e+02,
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4.64158883e+02, 5.17947468e+02, 5.77969288e+02, 6.44946677e+02,
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7.19685673e+02, 8.03085722e+02, 8.96150502e+02, 1.00000000e+03 };
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#if LC3_PLUS_HR
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static const float ge_34[LC3_MAX_BANDS] = { /* g_tilt = 34 */
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1.00000000e+00, 1.13231759e+00, 1.28214312e+00, 1.45179321e+00,
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1.64389099e+00, 1.86140669e+00, 2.10770353e+00, 2.38658979e+00,
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2.70237760e+00, 3.05994969e+00, 3.46483486e+00, 3.92329345e+00,
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4.44241419e+00, 5.03022373e+00, 5.69581081e+00, 6.44946677e+00,
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7.30284467e+00, 8.26913948e+00, 9.36329209e+00, 1.06022203e+01,
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1.20050806e+01, 1.35935639e+01, 1.53922315e+01, 1.74288945e+01,
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1.97350438e+01, 2.23463373e+01, 2.53031508e+01, 2.86512027e+01,
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3.24422608e+01, 3.67349426e+01, 4.15956216e+01, 4.70994540e+01,
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5.33315403e+01, 6.03882412e+01, 6.83786677e+01, 7.74263683e+01,
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8.76712387e+01, 9.92716858e+01, 1.12407076e+02, 1.27280509e+02,
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1.44121960e+02, 1.63191830e+02, 1.84784980e+02, 2.09235283e+02,
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||||
2.36920791e+02, 2.68269580e+02, 3.03766364e+02, 3.43959997e+02,
|
||||
3.89471955e+02, 4.41005945e+02, 4.99358789e+02, 5.65432741e+02,
|
||||
6.40249439e+02, 7.24965701e+02, 8.20891416e+02, 9.29509790e+02,
|
||||
1.05250029e+03, 1.19176459e+03, 1.34945600e+03, 1.52801277e+03,
|
||||
1.73019574e+03, 1.95913107e+03, 2.21835857e+03, 2.51188643e+03 };
|
||||
|
||||
#endif /* LC3_PLUS_HR */
|
||||
|
||||
static const float *ge_table[LC3_NUM_SRATE] = {
|
||||
[LC3_SRATE_8K ] = ge_14, [LC3_SRATE_16K ] = ge_18,
|
||||
[LC3_SRATE_24K ] = ge_22, [LC3_SRATE_32K ] = ge_26,
|
||||
[LC3_SRATE_48K ] = ge_30,
|
||||
|
||||
#if LC3_PLUS_HR
|
||||
[LC3_SRATE_48K_HR] = ge_30, [LC3_SRATE_96K_HR] = ge_34,
|
||||
#endif /* LC3_PLUS_HR */
|
||||
|
||||
[LC3_SRATE_48K] = { /* g_tilt = 30 */
|
||||
1.00000000e+00, 1.11588399e+00, 1.24519708e+00, 1.38949549e+00,
|
||||
1.55051578e+00, 1.73019574e+00, 1.93069773e+00, 2.15443469e+00,
|
||||
2.40409918e+00, 2.68269580e+00, 2.99357729e+00, 3.34048498e+00,
|
||||
3.72759372e+00, 4.15956216e+00, 4.64158883e+00, 5.17947468e+00,
|
||||
5.77969288e+00, 6.44946677e+00, 7.19685673e+00, 8.03085722e+00,
|
||||
8.96150502e+00, 1.00000000e+01, 1.11588399e+01, 1.24519708e+01,
|
||||
1.38949549e+01, 1.55051578e+01, 1.73019574e+01, 1.93069773e+01,
|
||||
2.15443469e+01, 2.40409918e+01, 2.68269580e+01, 2.99357729e+01,
|
||||
3.34048498e+01, 3.72759372e+01, 4.15956216e+01, 4.64158883e+01,
|
||||
5.17947468e+01, 5.77969288e+01, 6.44946677e+01, 7.19685673e+01,
|
||||
8.03085722e+01, 8.96150502e+01, 1.00000000e+02, 1.11588399e+02,
|
||||
1.24519708e+02, 1.38949549e+02, 1.55051578e+02, 1.73019574e+02,
|
||||
1.93069773e+02, 2.15443469e+02, 2.40409918e+02, 2.68269580e+02,
|
||||
2.99357729e+02, 3.34048498e+02, 3.72759372e+02, 4.15956216e+02,
|
||||
4.64158883e+02, 5.17947468e+02, 5.77969288e+02, 6.44946677e+02,
|
||||
7.19685673e+02, 8.03085722e+02, 8.96150502e+02, 1.00000000e+03 },
|
||||
};
|
||||
|
||||
float e[LC3_MAX_BANDS];
|
||||
@@ -291,7 +322,7 @@ LC3_HOT static void compute_scale_factors(
|
||||
float noise_floor = fmaxf(e_sum * (1e-4f / 64), 0x1p-32f);
|
||||
|
||||
for (int i = 0; i < LC3_MAX_BANDS; i++)
|
||||
e[i] = fast_log2f(fmaxf(e[i], noise_floor)) * 0.5f;
|
||||
e[i] = lc3_log2f(fmaxf(e[i], noise_floor)) * 0.5f;
|
||||
|
||||
/* --- Grouping & scaling --- */
|
||||
|
||||
@@ -314,8 +345,13 @@ LC3_HOT static void compute_scale_factors(
|
||||
(e[61] + e[62]) * 3.f/12 ;
|
||||
scf_sum += scf[15];
|
||||
|
||||
float cf = lc3_hr(sr) ? 0.6f : 0.85f;
|
||||
if (lc3_hr(sr) && 8 * nbytes >
|
||||
(dt < LC3_DT_10M ? 1150 * (int)(1 + dt) : 4400))
|
||||
cf *= dt < LC3_DT_10M ? 0.25f : 0.35f;
|
||||
|
||||
for (int i = 0; i < 16; i++)
|
||||
scf[i] = 0.85f * (scf[i] - scf_sum * 1.f/16);
|
||||
scf[i] = cf * (scf[i] - scf_sum * 1.f/16);
|
||||
|
||||
/* --- Attack handling --- */
|
||||
|
||||
@@ -714,10 +750,10 @@ LC3_HOT static void spectral_shaping(enum lc3_dt dt, enum lc3_srate sr,
|
||||
|
||||
/* --- Spectral shaping --- */
|
||||
|
||||
const uint16_t *lim = lc3_band_lim[dt][sr];
|
||||
const int *lim = lc3_band_lim[dt][sr];
|
||||
|
||||
for (int i = 0, ib = 0; ib < nb; ib++) {
|
||||
float g_sns = fast_exp2f(-scf[ib]);
|
||||
float g_sns = lc3_exp2f(-scf[ib]);
|
||||
|
||||
for ( ; i < lim[ib+1]; i++)
|
||||
y[i] = x[i] * g_sns;
|
||||
@@ -732,7 +768,8 @@ LC3_HOT static void spectral_shaping(enum lc3_dt dt, enum lc3_srate sr,
|
||||
/**
|
||||
* SNS analysis
|
||||
*/
|
||||
void lc3_sns_analyze(enum lc3_dt dt, enum lc3_srate sr,
|
||||
void lc3_sns_analyze(
|
||||
enum lc3_dt dt, enum lc3_srate sr, int nbytes,
|
||||
const float *eb, bool att, struct lc3_sns_data *data,
|
||||
const float *x, float *y)
|
||||
{
|
||||
@@ -746,7 +783,7 @@ void lc3_sns_analyze(enum lc3_dt dt, enum lc3_srate sr,
|
||||
float scf[16], cn[4][16];
|
||||
int c[4][16];
|
||||
|
||||
compute_scale_factors(dt, sr, eb, att, scf);
|
||||
compute_scale_factors(dt, sr, nbytes, eb, att, scf);
|
||||
|
||||
resolve_codebooks(scf, &data->lfcb, &data->hfcb);
|
||||
|
||||
@@ -765,7 +802,8 @@ void lc3_sns_analyze(enum lc3_dt dt, enum lc3_srate sr,
|
||||
/**
|
||||
* SNS synthesis
|
||||
*/
|
||||
void lc3_sns_synthesize(enum lc3_dt dt, enum lc3_srate sr,
|
||||
void lc3_sns_synthesize(
|
||||
enum lc3_dt dt, enum lc3_srate sr,
|
||||
const lc3_sns_data_t *data, const float *x, float *y)
|
||||
{
|
||||
float scf[16], cn[16];
|
||||
|
||||
Reference in New Issue
Block a user