version 1.14, 2020/12/10 17:20:39 |
version 1.15, 2021/01/11 14:45:51 |
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944, 912, 1008, 976, 816, 784, 880, 848 |
944, 912, 1008, 976, 816, 784, 880, 848 |
}; |
}; |
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int resamp_filt[RESAMP_LENGTH / RESAMP_STEP + 1] = { |
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0, 0, 3, 9, 22, 42, 73, 116, |
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174, 248, 341, 454, 589, 749, 934, 1148, |
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1392, 1666, 1974, 2316, 2693, 3107, 3560, 4051, |
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4582, 5154, 5766, 6420, 7116, 7853, 8632, 9451, |
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10311, 11210, 12148, 13123, 14133, 15178, 16253, 17359, |
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18491, 19647, 20824, 22018, 23226, 24443, 25665, 26888, |
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28106, 29315, 30509, 31681, 32826, 33938, 35009, 36033, |
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37001, 37908, 38744, 39502, 40174, 40750, 41223, 41582, |
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41819, 41925, 41890, 41704, 41358, 40842, 40147, 39261, |
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38176, 36881, 35366, 33623, 31641, 29411, 26923, 24169, |
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21140, 17827, 14222, 10317, 6105, 1580, -3267, -8440, |
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-13944, -19785, -25967, -32492, -39364, -46584, -54153, -62072, |
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-70339, -78953, -87911, -97209, -106843, -116806, -127092, -137692, |
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-148596, -159795, -171276, -183025, -195029, -207271, -219735, -232401, |
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-245249, -258259, -271407, -284670, -298021, -311434, -324880, -338329, |
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-351750, -365111, -378378, -391515, -404485, -417252, -429775, -442015, |
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-453930, -465477, -476613, -487294, -497472, -507102, -516137, -524527, |
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-532225, -539181, -545344, -550664, -555090, -558571, -561055, -562490, |
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-562826, -562010, -559990, -556717, -552139, -546205, -538866, -530074, |
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-519779, -507936, -494496, -479416, -462652, -444160, -423901, -401835, |
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-377923, -352132, -324425, -294772, -263143, -229509, -193847, -156134, |
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-116348, -74474, -30494, 15601, 63822, 114174, 166661, 221283, |
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278037, 336916, 397911, 461009, 526194, 593446, 662741, 734054, |
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807354, 882608, 959779, 1038826, 1119706, 1202370, 1286768, 1372846, |
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1460546, 1549808, 1640566, 1732753, 1826299, 1921130, 2017169, 2114336, |
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2212550, 2311723, 2411770, 2512598, 2614116, 2716228, 2818836, 2921841, |
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3025142, 3128636, 3232218, 3335782, 3439219, 3542423, 3645282, 3747687, |
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3849526, 3950687, 4051059, 4150530, 4248987, 4346320, 4442415, 4537163, |
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4630453, 4722177, 4812225, 4900493, 4986873, 5071263, 5153561, 5233668, |
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5311485, 5386917, 5459872, 5530259, 5597992, 5662986, 5725160, 5784436, |
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5840739, 5893999, 5944148, 5991122, 6034862, 6075313, 6112422, 6146142, |
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6176430, 6203247, 6226559, 6246335, 6262551, 6275185, 6284220, 6289647, |
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6291456, 6289647, 6284220, 6275185, 6262551, 6246335, 6226559, 6203247, |
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6176430, 6146142, 6112422, 6075313, 6034862, 5991122, 5944148, 5893999, |
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5840739, 5784436, 5725160, 5662986, 5597992, 5530259, 5459872, 5386917, |
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5311485, 5233668, 5153561, 5071263, 4986873, 4900493, 4812225, 4722177, |
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4630453, 4537163, 4442415, 4346320, 4248987, 4150530, 4051059, 3950687, |
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3849526, 3747687, 3645282, 3542423, 3439219, 3335782, 3232218, 3128636, |
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3025142, 2921841, 2818836, 2716228, 2614116, 2512598, 2411770, 2311723, |
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2212550, 2114336, 2017169, 1921130, 1826299, 1732753, 1640566, 1549808, |
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1460546, 1372846, 1286768, 1202370, 1119706, 1038826, 959779, 882608, |
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807354, 734054, 662741, 593446, 526194, 461009, 397911, 336916, |
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278037, 221283, 166661, 114174, 63822, 15601, -30494, -74474, |
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-116348, -156134, -193847, -229509, -263143, -294772, -324425, -352132, |
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-377923, -401835, -423901, -444160, -462652, -479416, -494496, -507936, |
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-519779, -530074, -538866, -546205, -552139, -556717, -559990, -562010, |
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-562826, -562490, -561055, -558571, -555090, -550664, -545344, -539181, |
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-532225, -524527, -516137, -507102, -497472, -487294, -476613, -465477, |
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-453930, -442015, -429775, -417252, -404485, -391515, -378378, -365111, |
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-351750, -338329, -324880, -311434, -298021, -284670, -271407, -258259, |
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-245249, -232401, -219735, -207271, -195029, -183025, -171276, -159795, |
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-148596, -137692, -127092, -116806, -106843, -97209, -87911, -78953, |
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-70339, -62072, -54153, -46584, -39364, -32492, -25967, -19785, |
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-13944, -8440, -3267, 1580, 6105, 10317, 14222, 17827, |
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21140, 24169, 26923, 29411, 31641, 33623, 35366, 36881, |
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38176, 39261, 40147, 40842, 41358, 41704, 41890, 41925, |
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41819, 41582, 41223, 40750, 40174, 39502, 38744, 37908, |
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37001, 36033, 35009, 33938, 32826, 31681, 30509, 29315, |
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28106, 26888, 25665, 24443, 23226, 22018, 20824, 19647, |
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18491, 17359, 16253, 15178, 14133, 13123, 12148, 11210, |
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10311, 9451, 8632, 7853, 7116, 6420, 5766, 5154, |
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4582, 4051, 3560, 3107, 2693, 2316, 1974, 1666, |
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1392, 1148, 934, 749, 589, 454, 341, 248, |
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174, 116, 73, 42, 22, 9, 3, 0, |
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0 |
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}; |
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/* |
/* |
* Generate a string corresponding to the encoding in par, |
* Generate a string corresponding to the encoding in par, |
* return the length of the resulting string. |
* return the length of the resulting string. |
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unsigned int iblksz; |
unsigned int iblksz; |
unsigned int ofr; |
unsigned int ofr; |
unsigned int c; |
unsigned int c; |
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int64_t f[NCHAN_MAX]; |
adata_t *ctxbuf, *ctx; |
adata_t *ctxbuf, *ctx; |
unsigned int ctx_start; |
unsigned int ctx_start; |
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int q, qi, qf, n; |
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/* |
/* |
* Partially copy structures into local variables, to avoid |
* Partially copy structures into local variables, to avoid |
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if (diff >= oblksz) { |
if (diff >= oblksz) { |
if (ifr == 0) |
if (ifr == 0) |
break; |
break; |
ctx_start ^= 1; |
ctx_start = (ctx_start - 1) & (RESAMP_NCTX - 1); |
ctx = ctxbuf + ctx_start; |
ctx = ctxbuf + ctx_start; |
for (c = nch; c > 0; c--) { |
for (c = nch; c > 0; c--) { |
*ctx = *idata++; |
*ctx = *idata++; |
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} else { |
} else { |
if (ofr == 0) |
if (ofr == 0) |
break; |
break; |
ctx = ctxbuf; |
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for (c = nch; c > 0; c--) |
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f[c] = 0; |
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q = diff * p->filt_step; |
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n = ctx_start; |
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while (q < RESAMP_LENGTH) { |
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qi = q >> RESAMP_STEP_BITS; |
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qf = q & (RESAMP_STEP - 1); |
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s = resamp_filt[qi]; |
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ds = resamp_filt[qi + 1] - s; |
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s += (int64_t)qf * ds >> RESAMP_STEP_BITS; |
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ctx = ctxbuf; |
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for (c = nch; c > 0; c--) { |
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f[c] += (int64_t)ctx[n] * s; |
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ctx += RESAMP_NCTX; |
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} |
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q += p->filt_cutoff; |
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n = (n + 1) & (RESAMP_NCTX - 1); |
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} |
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for (c = nch; c > 0; c--) { |
for (c = nch; c > 0; c--) { |
s = ctx[ctx_start ^ 1]; |
s = f[c] >> RESAMP_BITS; |
ds = ctx[ctx_start] - s; |
s = (int64_t)s * p->filt_cutoff >> RESAMP_BITS; |
ctx += RESAMP_NCTX; |
#if ADATA_BITS == 16 |
*odata++ = s + ADATA_MULDIV(ds, diff, oblksz); |
/* |
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* In 16-bit mode, we've no room for filter |
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* overshoots, so we need to clip the signal |
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* to avoid 16-bit integers to wrap around. |
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* In 24-bit mode, samples may exceed the |
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* [-1:1] range. Later, cmap_add() will clip |
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* them, so no need to clip them here as well. |
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*/ |
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if (s >= ADATA_UNIT) |
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s = ADATA_UNIT - 1; |
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else if (s < -ADATA_UNIT) |
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s = -ADATA_UNIT; |
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#endif |
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*odata++ = s; |
} |
} |
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diff += iblksz; |
diff += iblksz; |
ofr--; |
ofr--; |
} |
} |
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p->nch = nch; |
p->nch = nch; |
p->ctx_start = 0; |
p->ctx_start = 0; |
memset(p->ctx, 0, sizeof(p->ctx)); |
memset(p->ctx, 0, sizeof(p->ctx)); |
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if (p->iblksz < p->oblksz) { |
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p->filt_cutoff = RESAMP_UNIT; |
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p->filt_step = RESAMP_UNIT / p->oblksz; |
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} else { |
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p->filt_cutoff = (int64_t)RESAMP_UNIT * p->oblksz / p->iblksz; |
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p->filt_step = RESAMP_UNIT / p->iblksz; |
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} |
#ifdef DEBUG |
#ifdef DEBUG |
if (log_level >= 3) { |
if (log_level >= 3) { |
log_puts("resamp: "); |
log_puts("resamp: "); |