mirror of
https://github.com/FFmpeg/FFmpeg.git
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Restore WIP g729 code that has been remvoed by diego biurrun.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
parent
1aad9cd9d2
commit
0b61af7382
@ -105,9 +105,20 @@ int16_t ff_acelp_decode_gain_code(
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for(i=0; i<ma_pred_order; i++)
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for(i=0; i<ma_pred_order; i++)
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mr_energy += quant_energy[i] * ma_prediction_coeff[i];
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mr_energy += quant_energy[i] * ma_prediction_coeff[i];
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#ifdef G729_BITEXACT
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mr_energy += (((-6165LL * ff_log2(dsp->scalarproduct_int16(fc_v, fc_v, subframe_size, 0))) >> 3) & ~0x3ff);
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mr_energy = (5439 * (mr_energy >> 15)) >> 8; // (0.15) = (0.15) * (7.23)
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return bidir_sal(
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((ff_exp2(mr_energy & 0x7fff) + 16) >> 5) * (gain_corr_factor >> 1),
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(mr_energy >> 15) - 25
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);
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#else
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mr_energy = gain_corr_factor * exp(M_LN10 / (20 << 23) * mr_energy) /
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mr_energy = gain_corr_factor * exp(M_LN10 / (20 << 23) * mr_energy) /
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sqrt(dsp->scalarproduct_int16(fc_v, fc_v, subframe_size, 0));
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sqrt(dsp->scalarproduct_int16(fc_v, fc_v, subframe_size, 0));
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return mr_energy >> 12;
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return mr_energy >> 12;
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#endif
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}
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}
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float ff_amr_set_fixed_gain(float fixed_gain_factor, float fixed_mean_energy,
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float ff_amr_set_fixed_gain(float fixed_gain_factor, float fixed_mean_energy,
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@ -48,6 +48,26 @@ const uint8_t ff_fc_2pulses_9bits_track1_gray[16] =
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28, 26,
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28, 26,
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};
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};
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const uint8_t ff_fc_2pulses_9bits_track2_gray[32] =
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{
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0, 2,
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5, 4,
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12, 10,
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7, 9,
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25, 24,
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20, 22,
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14, 15,
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19, 17,
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36, 31,
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21, 26,
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1, 6,
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16, 11,
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27, 29,
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32, 30,
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39, 37,
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34, 35,
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};
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const uint8_t ff_fc_4pulses_8bits_tracks_13[16] =
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const uint8_t ff_fc_4pulses_8bits_tracks_13[16] =
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{
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{
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0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75,
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0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75,
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@ -81,6 +81,37 @@ extern const uint8_t ff_fc_4pulses_8bits_track_4[32];
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extern const uint8_t ff_fc_2pulses_9bits_track1[16];
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extern const uint8_t ff_fc_2pulses_9bits_track1[16];
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extern const uint8_t ff_fc_2pulses_9bits_track1_gray[16];
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extern const uint8_t ff_fc_2pulses_9bits_track1_gray[16];
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/**
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* Track|Pulse| Positions
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* -----------------------------------------
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* 2 | 1 | 0, 7, 14, 20, 27, 34, 1, 21
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* | | 2, 9, 15, 22, 29, 35, 6, 26
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* | | 4,10, 17, 24, 30, 37, 11, 31
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* | | 5,12, 19, 25, 32, 39, 16, 36
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* -----------------------------------------
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*
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* @remark Track in the table should be read top-to-bottom, left-to-right.
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*
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* @note (EE.1) This table (from the reference code) does not comply with
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* the specification.
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* The specification contains the following table:
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*
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* Track|Pulse| Positions
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* -----------------------------------------
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* 2 | 1 | 0, 5, 10, 15, 20, 25, 30, 35
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* | | 1, 6, 11, 16, 21, 26, 31, 36
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* | | 2, 7, 12, 17, 22, 27, 32, 37
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* | | 4, 9, 14, 19, 24, 29, 34, 39
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*
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* -----------------------------------------
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*
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* @note (EE.2) Reference G.729D code also uses gray decoding for each
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* pulse index before looking up the value in the table.
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*
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* Used in G.729 @@6.4k (with gray coding)
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*/
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extern const uint8_t ff_fc_2pulses_9bits_track2_gray[32];
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/**
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/**
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* b60 hamming windowed sinc function coefficients
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* b60 hamming windowed sinc function coefficients
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*/
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*/
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@ -83,7 +83,7 @@
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/** Maximum sharpening factor
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/** Maximum sharpening factor
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*
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*
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* The specification says 0.8, which should be 13107, but the reference C code
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* The specification says 0.8, which should be 13107, but the reference C code
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* uses 13017 instead. (Amusingly the same applies to SHARP_MAX in bitexact G.729.)
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* uses 13017 instead. (Amusingly the same applies to SHARP_MAX in g729dec.c.)
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*/
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*/
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#define SHARP_MAX 0.79449462890625
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#define SHARP_MAX 0.79449462890625
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@ -27,6 +27,82 @@
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#include "avcodec.h"
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#include "avcodec.h"
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#include "celp_math.h"
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#include "celp_math.h"
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#ifdef G729_BITEXACT
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/**
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* Cosine table: base_cos[i] = (1<<15) * cos(i*PI/64)
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*/
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static const int16_t base_cos[64] =
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{
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32767, 32729, 32610, 32413, 32138, 31786, 31357, 30853,
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30274, 29622, 28899, 28106, 27246, 26320, 25330, 24279,
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23170, 22006, 20788, 19520, 18205, 16846, 15447, 14010,
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12540, 11039, 9512, 7962, 6393, 4808, 3212, 1608,
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0, -1608, -3212, -4808, -6393, -7962, -9512, -11039,
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-12540, -14010, -15447, -16846, -18205, -19520, -20788, -22006,
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-23170, -24279, -25330, -26320, -27246, -28106, -28899, -29622,
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-30274, -30853, -31357, -31786, -32138, -32413, -32610, -32729
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};
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/**
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* Slope used to compute cos(x)
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*
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* cos(ind*64+offset) = base_cos[ind]+offset*slope_cos[ind]
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* values multiplied by 1<<19
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*/
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static const int16_t slope_cos[64] =
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{
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-632, -1893, -3150, -4399, -5638, -6863, -8072, -9261,
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-10428, -11570, -12684, -13767, -14817, -15832, -16808, -17744,
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-18637, -19486, -20287, -21039, -21741, -22390, -22986, -23526,
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-24009, -24435, -24801, -25108, -25354, -25540, -25664, -25726,
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-25726, -25664, -25540, -25354, -25108, -24801, -24435, -24009,
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-23526, -22986, -22390, -21741, -21039, -20287, -19486, -18637,
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-17744, -16808, -15832, -14817, -13767, -12684, -11570, -10428,
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-9261, -8072, -6863, -5638, -4399, -3150, -1893, -632
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};
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/**
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* Table used to compute exp2(x)
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*
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* tab_exp2[i] = (1<<14) * exp2(i/32) = 2^(i/32) i=0..32
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*/
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static const uint16_t tab_exp2[33] =
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{
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16384, 16743, 17109, 17484, 17867, 18258, 18658, 19066, 19484, 19911,
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20347, 20792, 21247, 21713, 22188, 22674, 23170, 23678, 24196, 24726,
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25268, 25821, 26386, 26964, 27554, 28158, 28774, 29405, 30048, 30706,
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31379, 32066, 32767
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};
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int16_t ff_cos(uint16_t arg)
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{
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uint8_t offset= arg;
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uint8_t ind = arg >> 8;
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assert(arg < 0x4000);
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return FFMAX(base_cos[ind] + ((slope_cos[ind] * offset) >> 12), -0x8000);
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}
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int ff_exp2(uint16_t power)
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{
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uint16_t frac_x0;
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uint16_t frac_dx;
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int result;
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assert(power <= 0x7fff);
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frac_x0 = power >> 10;
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frac_dx = (power & 0x03ff) << 5;
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result = tab_exp2[frac_x0] << 15;
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result += frac_dx * (tab_exp2[frac_x0+1] - tab_exp2[frac_x0]);
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return result >> 10;
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}
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#else // G729_BITEXACT
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/**
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/**
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* Cosine table: base_cos[i] = (1<<15) * cos(i*PI/64)
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* Cosine table: base_cos[i] = (1<<15) * cos(i*PI/64)
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*/
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*/
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@ -78,6 +154,8 @@ int ff_exp2(uint16_t power)
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return result + ((result*(power&31)*89)>>22);
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return result + ((result*(power&31)*89)>>22);
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}
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}
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#endif // else G729_BITEXACT
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/**
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/**
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* Table used to compute log2(x)
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* Table used to compute log2(x)
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*
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*
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@ -85,10 +163,17 @@ int ff_exp2(uint16_t power)
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*/
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*/
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static const uint16_t tab_log2[33] =
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static const uint16_t tab_log2[33] =
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{
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{
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#ifdef G729_BITEXACT
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0, 1455, 2866, 4236, 5568, 6863, 8124, 9352,
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10549, 11716, 12855, 13967, 15054, 16117, 17156, 18172,
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19167, 20142, 21097, 22033, 22951, 23852, 24735, 25603,
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26455, 27291, 28113, 28922, 29716, 30497, 31266, 32023, 32767,
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#else
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4, 1459, 2870, 4240, 5572, 6867, 8127, 9355,
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4, 1459, 2870, 4240, 5572, 6867, 8127, 9355,
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10552, 11719, 12858, 13971, 15057, 16120, 17158, 18175,
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10552, 11719, 12858, 13971, 15057, 16120, 17158, 18175,
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19170, 20145, 21100, 22036, 22954, 23854, 24738, 25605,
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19170, 20145, 21100, 22036, 22954, 23854, 24738, 25605,
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26457, 27294, 28116, 28924, 29719, 30500, 31269, 32025, 32769,
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26457, 27294, 28116, 28924, 29719, 30500, 31269, 32025, 32769,
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#endif
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};
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};
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int ff_log2(uint32_t value)
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int ff_log2(uint32_t value)
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278
libavcodec/g729data.h
Normal file
278
libavcodec/g729data.h
Normal file
@ -0,0 +1,278 @@
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/*
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* data for G.729 decoder
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* Copyright (c) 2007 Vladimir Voroshilov
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_G729DATA_H
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#define AVCODEC_G729DATA_H
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#include <stdint.h>
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#define MA_NP 4 ///< Moving Average (MA) prediction order
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#define VQ_1ST_BITS 7 ///< first stage vector of quantizer (size in bits)
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#define VQ_2ND_BITS 5 ///< second stage vector of quantizer (size in bits)
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#define GC_1ST_IDX_BITS_8K 3 ///< gain codebook (first stage) index, 8k mode (size in bits)
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#define GC_2ND_IDX_BITS_8K 4 ///< gain codebook (second stage) index, 8k mode (size in bits)
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#define GC_1ST_IDX_BITS_6K4 3 ///< gain codebook (first stage) index, 6.4k mode (size in bits)
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#define GC_2ND_IDX_BITS_6K4 3 ///< gain codebook (second stage) index, 6.4k mode (size in bits)
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/**
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* first stage LSP codebook
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* (10-dimensional, with 128 entries (3.24 of G.729)
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*/
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static const int16_t cb_lsp_1st[1<<VQ_1ST_BITS][10] = { /* (2.13) */
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{ 1486, 2168, 3751, 9074, 12134, 13944, 17983, 19173, 21190, 21820},
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{ 1730, 2640, 3450, 4870, 6126, 7876, 15644, 17817, 20294, 21902},
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{ 1568, 2256, 3088, 4874, 11063, 13393, 18307, 19293, 21109, 21741},
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{ 1733, 2512, 3357, 4708, 6977, 10296, 17024, 17956, 19145, 20350},
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{ 1744, 2436, 3308, 8731, 10432, 12007, 15614, 16639, 21359, 21913},
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{ 1786, 2369, 3372, 4521, 6795, 12963, 17674, 18988, 20855, 21640},
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{ 1631, 2433, 3361, 6328, 10709, 12013, 13277, 13904, 19441, 21088},
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{ 1489, 2364, 3291, 6250, 9227, 10403, 13843, 15278, 17721, 21451},
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{ 1869, 2533, 3475, 4365, 9152, 14513, 15908, 17022, 20611, 21411},
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{ 2070, 3025, 4333, 5854, 7805, 9231, 10597, 16047, 20109, 21834},
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{ 1910, 2673, 3419, 4261, 11168, 15111, 16577, 17591, 19310, 20265},
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{ 1141, 1815, 2624, 4623, 6495, 9588, 13968, 16428, 19351, 21286},
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{ 2192, 3171, 4707, 5808, 10904, 12500, 14162, 15664, 21124, 21789},
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{ 1286, 1907, 2548, 3453, 9574, 11964, 15978, 17344, 19691, 22495},
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{ 1921, 2720, 4604, 6684, 11503, 12992, 14350, 15262, 16997, 20791},
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{ 2052, 2759, 3897, 5246, 6638, 10267, 15834, 16814, 18149, 21675},
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{ 1798, 2497, 5617, 11449, 13189, 14711, 17050, 18195, 20307, 21182},
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{ 1009, 1647, 2889, 5709, 9541, 12354, 15231, 18494, 20966, 22033},
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{ 3016, 3794, 5406, 7469, 12488, 13984, 15328, 16334, 19952, 20791},
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{ 2203, 3040, 3796, 5442, 11987, 13512, 14931, 16370, 17856, 18803},
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{ 2912, 4292, 7988, 9572, 11562, 13244, 14556, 16529, 20004, 21073},
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{ 2861, 3607, 5923, 7034, 9234, 12054, 13729, 18056, 20262, 20974},
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{ 3069, 4311, 5967, 7367, 11482, 12699, 14309, 16233, 18333, 19172},
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{ 2434, 3661, 4866, 5798, 10383, 11722, 13049, 15668, 18862, 19831},
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{ 2020, 2605, 3860, 9241, 13275, 14644, 16010, 17099, 19268, 20251},
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{ 1877, 2809, 3590, 4707, 11056, 12441, 15622, 17168, 18761, 19907},
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{ 2107, 2873, 3673, 5799, 13579, 14687, 15938, 17077, 18890, 19831},
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{ 1612, 2284, 2944, 3572, 8219, 13959, 15924, 17239, 18592, 20117},
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{ 2420, 3156, 6542, 10215, 12061, 13534, 15305, 16452, 18717, 19880},
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{ 1667, 2612, 3534, 5237, 10513, 11696, 12940, 16798, 18058, 19378},
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{ 2388, 3017, 4839, 9333, 11413, 12730, 15024, 16248, 17449, 18677},
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{ 1875, 2786, 4231, 6320, 8694, 10149, 11785, 17013, 18608, 19960},
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{ 679, 1411, 4654, 8006, 11446, 13249, 15763, 18127, 20361, 21567},
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|
{ 1838, 2596, 3578, 4608, 5650, 11274, 14355, 15886, 20579, 21754},
|
||||||
|
{ 1303, 1955, 2395, 3322, 12023, 13764, 15883, 18077, 20180, 21232},
|
||||||
|
{ 1438, 2102, 2663, 3462, 8328, 10362, 13763, 17248, 19732, 22344},
|
||||||
|
{ 860, 1904, 6098, 7775, 9815, 12007, 14821, 16709, 19787, 21132},
|
||||||
|
{ 1673, 2723, 3704, 6125, 7668, 9447, 13683, 14443, 20538, 21731},
|
||||||
|
{ 1246, 1849, 2902, 4508, 7221, 12710, 14835, 16314, 19335, 22720},
|
||||||
|
{ 1525, 2260, 3862, 5659, 7342, 11748, 13370, 14442, 18044, 21334},
|
||||||
|
{ 1196, 1846, 3104, 7063, 10972, 12905, 14814, 17037, 19922, 22636},
|
||||||
|
{ 2147, 3106, 4475, 6511, 8227, 9765, 10984, 12161, 18971, 21300},
|
||||||
|
{ 1585, 2405, 2994, 4036, 11481, 13177, 14519, 15431, 19967, 21275},
|
||||||
|
{ 1778, 2688, 3614, 4680, 9465, 11064, 12473, 16320, 19742, 20800},
|
||||||
|
{ 1862, 2586, 3492, 6719, 11708, 13012, 14364, 16128, 19610, 20425},
|
||||||
|
{ 1395, 2156, 2669, 3386, 10607, 12125, 13614, 16705, 18976, 21367},
|
||||||
|
{ 1444, 2117, 3286, 6233, 9423, 12981, 14998, 15853, 17188, 21857},
|
||||||
|
{ 2004, 2895, 3783, 4897, 6168, 7297, 12609, 16445, 19297, 21465},
|
||||||
|
{ 1495, 2863, 6360, 8100, 11399, 14271, 15902, 17711, 20479, 22061},
|
||||||
|
{ 2484, 3114, 5718, 7097, 8400, 12616, 14073, 14847, 20535, 21396},
|
||||||
|
{ 2424, 3277, 5296, 6284, 11290, 12903, 16022, 17508, 19333, 20283},
|
||||||
|
{ 2565, 3778, 5360, 6989, 8782, 10428, 14390, 15742, 17770, 21734},
|
||||||
|
{ 2727, 3384, 6613, 9254, 10542, 12236, 14651, 15687, 20074, 21102},
|
||||||
|
{ 1916, 2953, 6274, 8088, 9710, 10925, 12392, 16434, 20010, 21183},
|
||||||
|
{ 3384, 4366, 5349, 7667, 11180, 12605, 13921, 15324, 19901, 20754},
|
||||||
|
{ 3075, 4283, 5951, 7619, 9604, 11010, 12384, 14006, 20658, 21497},
|
||||||
|
{ 1751, 2455, 5147, 9966, 11621, 13176, 14739, 16470, 20788, 21756},
|
||||||
|
{ 1442, 2188, 3330, 6813, 8929, 12135, 14476, 15306, 19635, 20544},
|
||||||
|
{ 2294, 2895, 4070, 8035, 12233, 13416, 14762, 17367, 18952, 19688},
|
||||||
|
{ 1937, 2659, 4602, 6697, 9071, 12863, 14197, 15230, 16047, 18877},
|
||||||
|
{ 2071, 2663, 4216, 9445, 10887, 12292, 13949, 14909, 19236, 20341},
|
||||||
|
{ 1740, 2491, 3488, 8138, 9656, 11153, 13206, 14688, 20896, 21907},
|
||||||
|
{ 2199, 2881, 4675, 8527, 10051, 11408, 14435, 15463, 17190, 20597},
|
||||||
|
{ 1943, 2988, 4177, 6039, 7478, 8536, 14181, 15551, 17622, 21579},
|
||||||
|
{ 1825, 3175, 7062, 9818, 12824, 15450, 18330, 19856, 21830, 22412},
|
||||||
|
{ 2464, 3046, 4822, 5977, 7696, 15398, 16730, 17646, 20588, 21320},
|
||||||
|
{ 2550, 3393, 5305, 6920, 10235, 14083, 18143, 19195, 20681, 21336},
|
||||||
|
{ 3003, 3799, 5321, 6437, 7919, 11643, 15810, 16846, 18119, 18980},
|
||||||
|
{ 3455, 4157, 6838, 8199, 9877, 12314, 15905, 16826, 19949, 20892},
|
||||||
|
{ 3052, 3769, 4891, 5810, 6977, 10126, 14788, 15990, 19773, 20904},
|
||||||
|
{ 3671, 4356, 5827, 6997, 8460, 12084, 14154, 14939, 19247, 20423},
|
||||||
|
{ 2716, 3684, 5246, 6686, 8463, 10001, 12394, 14131, 16150, 19776},
|
||||||
|
{ 1945, 2638, 4130, 7995, 14338, 15576, 17057, 18206, 20225, 20997},
|
||||||
|
{ 2304, 2928, 4122, 4824, 5640, 13139, 15825, 16938, 20108, 21054},
|
||||||
|
{ 1800, 2516, 3350, 5219, 13406, 15948, 17618, 18540, 20531, 21252},
|
||||||
|
{ 1436, 2224, 2753, 4546, 9657, 11245, 15177, 16317, 17489, 19135},
|
||||||
|
{ 2319, 2899, 4980, 6936, 8404, 13489, 15554, 16281, 20270, 20911},
|
||||||
|
{ 2187, 2919, 4610, 5875, 7390, 12556, 14033, 16794, 20998, 21769},
|
||||||
|
{ 2235, 2923, 5121, 6259, 8099, 13589, 15340, 16340, 17927, 20159},
|
||||||
|
{ 1765, 2638, 3751, 5730, 7883, 10108, 13633, 15419, 16808, 18574},
|
||||||
|
{ 3460, 5741, 9596, 11742, 14413, 16080, 18173, 19090, 20845, 21601},
|
||||||
|
{ 3735, 4426, 6199, 7363, 9250, 14489, 16035, 17026, 19873, 20876},
|
||||||
|
{ 3521, 4778, 6887, 8680, 12717, 14322, 15950, 18050, 20166, 21145},
|
||||||
|
{ 2141, 2968, 6865, 8051, 10010, 13159, 14813, 15861, 17528, 18655},
|
||||||
|
{ 4148, 6128, 9028, 10871, 12686, 14005, 15976, 17208, 19587, 20595},
|
||||||
|
{ 4403, 5367, 6634, 8371, 10163, 11599, 14963, 16331, 17982, 18768},
|
||||||
|
{ 4091, 5386, 6852, 8770, 11563, 13290, 15728, 16930, 19056, 20102},
|
||||||
|
{ 2746, 3625, 5299, 7504, 10262, 11432, 13172, 15490, 16875, 17514},
|
||||||
|
{ 2248, 3556, 8539, 10590, 12665, 14696, 16515, 17824, 20268, 21247},
|
||||||
|
{ 1279, 1960, 3920, 7793, 10153, 14753, 16646, 18139, 20679, 21466},
|
||||||
|
{ 2440, 3475, 6737, 8654, 12190, 14588, 17119, 17925, 19110, 19979},
|
||||||
|
{ 1879, 2514, 4497, 7572, 10017, 14948, 16141, 16897, 18397, 19376},
|
||||||
|
{ 2804, 3688, 7490, 10086, 11218, 12711, 16307, 17470, 20077, 21126},
|
||||||
|
{ 2023, 2682, 3873, 8268, 10255, 11645, 15187, 17102, 18965, 19788},
|
||||||
|
{ 2823, 3605, 5815, 8595, 10085, 11469, 16568, 17462, 18754, 19876},
|
||||||
|
{ 2851, 3681, 5280, 7648, 9173, 10338, 14961, 16148, 17559, 18474},
|
||||||
|
{ 1348, 2645, 5826, 8785, 10620, 12831, 16255, 18319, 21133, 22586},
|
||||||
|
{ 2141, 3036, 4293, 6082, 7593, 10629, 17158, 18033, 21466, 22084},
|
||||||
|
{ 1608, 2375, 3384, 6878, 9970, 11227, 16928, 17650, 20185, 21120},
|
||||||
|
{ 2774, 3616, 5014, 6557, 7788, 8959, 17068, 18302, 19537, 20542},
|
||||||
|
{ 1934, 4813, 6204, 7212, 8979, 11665, 15989, 17811, 20426, 21703},
|
||||||
|
{ 2288, 3507, 5037, 6841, 8278, 9638, 15066, 16481, 21653, 22214},
|
||||||
|
{ 2951, 3771, 4878, 7578, 9016, 10298, 14490, 15242, 20223, 20990},
|
||||||
|
{ 3256, 4791, 6601, 7521, 8644, 9707, 13398, 16078, 19102, 20249},
|
||||||
|
{ 1827, 2614, 3486, 6039, 12149, 13823, 16191, 17282, 21423, 22041},
|
||||||
|
{ 1000, 1704, 3002, 6335, 8471, 10500, 14878, 16979, 20026, 22427},
|
||||||
|
{ 1646, 2286, 3109, 7245, 11493, 12791, 16824, 17667, 18981, 20222},
|
||||||
|
{ 1708, 2501, 3315, 6737, 8729, 9924, 16089, 17097, 18374, 19917},
|
||||||
|
{ 2623, 3510, 4478, 5645, 9862, 11115, 15219, 18067, 19583, 20382},
|
||||||
|
{ 2518, 3434, 4728, 6388, 8082, 9285, 13162, 18383, 19819, 20552},
|
||||||
|
{ 1726, 2383, 4090, 6303, 7805, 12845, 14612, 17608, 19269, 20181},
|
||||||
|
{ 2860, 3735, 4838, 6044, 7254, 8402, 14031, 16381, 18037, 19410},
|
||||||
|
{ 4247, 5993, 7952, 9792, 12342, 14653, 17527, 18774, 20831, 21699},
|
||||||
|
{ 3502, 4051, 5680, 6805, 8146, 11945, 16649, 17444, 20390, 21564},
|
||||||
|
{ 3151, 4893, 5899, 7198, 11418, 13073, 15124, 17673, 20520, 21861},
|
||||||
|
{ 3960, 4848, 5926, 7259, 8811, 10529, 15661, 16560, 18196, 20183},
|
||||||
|
{ 4499, 6604, 8036, 9251, 10804, 12627, 15880, 17512, 20020, 21046},
|
||||||
|
{ 4251, 5541, 6654, 8318, 9900, 11686, 15100, 17093, 20572, 21687},
|
||||||
|
{ 3769, 5327, 7865, 9360, 10684, 11818, 13660, 15366, 18733, 19882},
|
||||||
|
{ 3083, 3969, 6248, 8121, 9798, 10994, 12393, 13686, 17888, 19105},
|
||||||
|
{ 2731, 4670, 7063, 9201, 11346, 13735, 16875, 18797, 20787, 22360},
|
||||||
|
{ 1187, 2227, 4737, 7214, 9622, 12633, 15404, 17968, 20262, 23533},
|
||||||
|
{ 1911, 2477, 3915, 10098, 11616, 12955, 16223, 17138, 19270, 20729},
|
||||||
|
{ 1764, 2519, 3887, 6944, 9150, 12590, 16258, 16984, 17924, 18435},
|
||||||
|
{ 1400, 3674, 7131, 8718, 10688, 12508, 15708, 17711, 19720, 21068},
|
||||||
|
{ 2322, 3073, 4287, 8108, 9407, 10628, 15862, 16693, 19714, 21474},
|
||||||
|
{ 2630, 3339, 4758, 8360, 10274, 11333, 12880, 17374, 19221, 19936},
|
||||||
|
{ 1721, 2577, 5553, 7195, 8651, 10686, 15069, 16953, 18703, 19929}
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* second stage LSP codebook, high and low parts
|
||||||
|
(both 5-dimensional, with 32 entries (3.2.4 of G.729)
|
||||||
|
*/
|
||||||
|
static const int16_t cb_lsp_2nd[1<<VQ_2ND_BITS][10] = { /* (2.13) */
|
||||||
|
{ -435, -815, -742, 1033, -518, 582, -1201, 829, 86, 385},
|
||||||
|
{ -833, -891, 463, -8, -1251, 1450, 72, -231, 864, 661},
|
||||||
|
{-1021, 231, -306, 321, -220, -163, -526, -754, -1633, 267},
|
||||||
|
{ 57, -198, -339, -33, -1468, 573, 796, -169, -631, 816},
|
||||||
|
{ 171, -350, 294, 1660, 453, 519, 291, 159, -640, -1296},
|
||||||
|
{ -701, -842, -58, 950, 892, 1549, 715, 527, -714, -193},
|
||||||
|
{ 584, 31, -289, 356, -333, -457, 612, -283, -1381, -741},
|
||||||
|
{ -109, -808, 231, 77, -87, -344, 1341, 1087, -654, -569},
|
||||||
|
{ -859, 1236, 550, 854, 714, -543, -1752, -195, -98, -276},
|
||||||
|
{ -877, -954, -1248, -299, 212, -235, -728, 949, 1517, 895},
|
||||||
|
{ -77, 344, -620, 763, 413, 502, -362, -960, -483, 1386},
|
||||||
|
{ -314, -307, -256, -1260, -429, 450, -466, -108, 1010, 2223},
|
||||||
|
{ 711, 693, 521, 650, 1305, -28, -378, 744, -1005, 240},
|
||||||
|
{ -112, -271, -500, 946, 1733, 271, -15, 909, -259, 1688},
|
||||||
|
{ 575, -10, -468, -199, 1101, -1011, 581, -53, -747, 878},
|
||||||
|
{ 145, -285, -1280, -398, 36, -498, -1377, 18, -444, 1483},
|
||||||
|
{-1133, -835, 1350, 1284, -95, 1015, -222, 443, 372, -354},
|
||||||
|
{-1459, -1237, 416, -213, 466, 669, 659, 1640, 932, 534},
|
||||||
|
{ -15, 66, 468, 1019, -748, 1385, -182, -907, -721, -262},
|
||||||
|
{ -338, 148, 1445, 75, -760, 569, 1247, 337, 416, -121},
|
||||||
|
{ 389, 239, 1568, 981, 113, 369, -1003, -507, -587, -904},
|
||||||
|
{ -312, -98, 949, 31, 1104, 72, -141, 1465, 63, -785},
|
||||||
|
{ 1127, 584, 835, 277, -1159, 208, 301, -882, 117, -404},
|
||||||
|
{ 539, -114, 856, -493, 223, -912, 623, -76, 276, -440},
|
||||||
|
{ 2197, 2337, 1268, 670, 304, -267, -525, 140, 882, -139},
|
||||||
|
{-1596, 550, 801, -456, -56, -697, 865, 1060, 413, 446},
|
||||||
|
{ 1154, 593, -77, 1237, -31, 581, -1037, -895, 669, 297},
|
||||||
|
{ 397, 558, 203, -797, -919, 3, 692, -292, 1050, 782},
|
||||||
|
{ 334, 1475, 632, -80, 48, -1061, -484, 362, -597, -852},
|
||||||
|
{ -545, -330, -429, -680, 1133, -1182, -744, 1340, 262, 63},
|
||||||
|
{ 1320, 827, -398, -576, 341, -774, -483, -1247, -70, 98},
|
||||||
|
{ -163, 674, -11, -886, 531, -1125, -265, -242, 724, 934}
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* gain codebook (first stage), 8k mode (3.9.2 of G.729)
|
||||||
|
*/
|
||||||
|
static const int16_t cb_gain_1st_8k[1<<GC_1ST_IDX_BITS_8K][2] = { /*(0.14) (2.13) */
|
||||||
|
{ 3242 , 9949 },
|
||||||
|
{ 1551 , 2425 },
|
||||||
|
{ 2678 , 27162 },
|
||||||
|
{ 1921 , 9291 },
|
||||||
|
{ 1831 , 5022 },
|
||||||
|
{ 1 , 1516 },
|
||||||
|
{ 356 , 14756 },
|
||||||
|
{ 57 , 5404 },
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* gain codebook (second stage), 8k mode (3.9.2 of G.729)
|
||||||
|
*/
|
||||||
|
static const int16_t cb_gain_2nd_8k[1<<GC_2ND_IDX_BITS_8K][2] = { /*(1.14) (1.13) */
|
||||||
|
{ 5142 , 592 },
|
||||||
|
{ 17299 , 1861 },
|
||||||
|
{ 6160 , 2395 },
|
||||||
|
{ 16112 , 3392 },
|
||||||
|
{ 826 , 2005 },
|
||||||
|
{ 18973 , 5935 },
|
||||||
|
{ 1994 , 0 },
|
||||||
|
{ 15434 , 237 },
|
||||||
|
{ 10573 , 2966 },
|
||||||
|
{ 15132 , 4914 },
|
||||||
|
{ 11569 , 1196 },
|
||||||
|
{ 14194 , 1630 },
|
||||||
|
{ 8091 , 4861 },
|
||||||
|
{ 15161 , 14276 },
|
||||||
|
{ 9120 , 525 },
|
||||||
|
{ 13260 , 3256 },
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* 4th order Moving Average (MA) Predictor codebook (3.2.4 of G.729)
|
||||||
|
*/
|
||||||
|
static const int16_t cb_ma_predictor[2][MA_NP][10] = { /* (0.15) */
|
||||||
|
{
|
||||||
|
{ 8421, 9109, 9175, 8965, 9034, 9057, 8765, 8775, 9106, 8673},
|
||||||
|
{ 7018, 7189, 7638, 7307, 7444, 7379, 7038, 6956, 6930, 6868},
|
||||||
|
{ 5472, 4990, 5134, 5177, 5246, 5141, 5206, 5095, 4830, 5147},
|
||||||
|
{ 4056, 3031, 2614, 3024, 2916, 2713, 3309, 3237, 2857, 3473}
|
||||||
|
},
|
||||||
|
{
|
||||||
|
{ 7733, 7880, 8188, 8175, 8247, 8490, 8637, 8601, 8359, 7569},
|
||||||
|
{ 4210, 3031, 2552, 3473, 3876, 3853, 4184, 4154, 3909, 3968},
|
||||||
|
{ 3214, 1930, 1313, 2143, 2493, 2385, 2755, 2706, 2542, 2919},
|
||||||
|
{ 3024, 1592, 940, 1631, 1723, 1579, 2034, 2084, 1913, 2601}
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
static const int16_t cb_ma_predictor_sum[2][10] = { /* (0.15) */
|
||||||
|
{ 7798, 8447, 8205, 8293, 8126, 8477, 8447, 8703, 9043, 8604},
|
||||||
|
{14585, 18333, 19772, 17344, 16426, 16459, 15155, 15220, 16043, 15708}
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* initial LSP coefficients belongs to virtual frame preceding the
|
||||||
|
* first frame of the stream
|
||||||
|
*/
|
||||||
|
static const int16_t lsp_init[10]= { /* (0.15) */
|
||||||
|
30000, 26000, 21000, 15000, 8000, 0, -8000,-15000,-21000,-26000
|
||||||
|
};
|
||||||
|
#endif /* AVCODEC_G729DATA_H */
|
||||||
331
libavcodec/g729dec.c
Normal file
331
libavcodec/g729dec.c
Normal file
@ -0,0 +1,331 @@
|
|||||||
|
/*
|
||||||
|
* G.729 decoder
|
||||||
|
* Copyright (c) 2008 Vladimir Voroshilov
|
||||||
|
*
|
||||||
|
* This file is part of FFmpeg.
|
||||||
|
*
|
||||||
|
* FFmpeg is free software; you can redistribute it and/or
|
||||||
|
* modify it under the terms of the GNU Lesser General Public
|
||||||
|
* License as published by the Free Software Foundation; either
|
||||||
|
* version 2.1 of the License, or (at your option) any later version.
|
||||||
|
*
|
||||||
|
* FFmpeg is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||||
|
* Lesser General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU Lesser General Public
|
||||||
|
* License along with FFmpeg; if not, write to the Free Software
|
||||||
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||||||
|
*/
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <inttypes.h>
|
||||||
|
#include <limits.h>
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <string.h>
|
||||||
|
#include <math.h>
|
||||||
|
#include <assert.h>
|
||||||
|
|
||||||
|
#include "avcodec.h"
|
||||||
|
#include "libavutil/avutil.h"
|
||||||
|
#include "get_bits.h"
|
||||||
|
|
||||||
|
#include "lsp.h"
|
||||||
|
#include "celp_math.h"
|
||||||
|
#include "acelp_filters.h"
|
||||||
|
#include "acelp_pitch_delay.h"
|
||||||
|
#include "acelp_vectors.h"
|
||||||
|
#include "g729data.h"
|
||||||
|
|
||||||
|
/**
|
||||||
|
* minimum quantized LSF value (3.2.4)
|
||||||
|
* 0.005 in Q13
|
||||||
|
*/
|
||||||
|
#define LSFQ_MIN 40
|
||||||
|
|
||||||
|
/**
|
||||||
|
* maximum quantized LSF value (3.2.4)
|
||||||
|
* 3.135 in Q13
|
||||||
|
*/
|
||||||
|
#define LSFQ_MAX 25681
|
||||||
|
|
||||||
|
/**
|
||||||
|
* minimum LSF distance (3.2.4)
|
||||||
|
* 0.0391 in Q13
|
||||||
|
*/
|
||||||
|
#define LSFQ_DIFF_MIN 321
|
||||||
|
|
||||||
|
/**
|
||||||
|
* minimum gain pitch value (3.8, Equation 47)
|
||||||
|
* 0.2 in (1.14)
|
||||||
|
*/
|
||||||
|
#define SHARP_MIN 3277
|
||||||
|
|
||||||
|
/**
|
||||||
|
* maximum gain pitch value (3.8, Equation 47)
|
||||||
|
* (EE) This does not comply with the specification.
|
||||||
|
* Specification says about 0.8, which should be
|
||||||
|
* 13107 in (1.14), but reference C code uses
|
||||||
|
* 13017 (equals to 0.7945) instead of it.
|
||||||
|
*/
|
||||||
|
#define SHARP_MAX 13017
|
||||||
|
|
||||||
|
/**
|
||||||
|
* subframe size
|
||||||
|
*/
|
||||||
|
#define SUBFRAME_SIZE 40
|
||||||
|
|
||||||
|
|
||||||
|
typedef struct {
|
||||||
|
uint8_t ac_index_bits[2]; ///< adaptive codebook index for second subframe (size in bits)
|
||||||
|
uint8_t parity_bit; ///< parity bit for pitch delay
|
||||||
|
uint8_t gc_1st_index_bits; ///< gain codebook (first stage) index (size in bits)
|
||||||
|
uint8_t gc_2nd_index_bits; ///< gain codebook (second stage) index (size in bits)
|
||||||
|
uint8_t fc_signs_bits; ///< number of pulses in fixed-codebook vector
|
||||||
|
uint8_t fc_indexes_bits; ///< size (in bits) of fixed-codebook index entry
|
||||||
|
} G729FormatDescription;
|
||||||
|
|
||||||
|
typedef struct {
|
||||||
|
int pitch_delay_int_prev; ///< integer part of previous subframe's pitch delay (4.1.3)
|
||||||
|
|
||||||
|
/// (2.13) LSP quantizer outputs
|
||||||
|
int16_t past_quantizer_output_buf[MA_NP + 1][10];
|
||||||
|
int16_t* past_quantizer_outputs[MA_NP + 1];
|
||||||
|
|
||||||
|
int16_t lsfq[10]; ///< (2.13) quantized LSF coefficients from previous frame
|
||||||
|
int16_t lsp_buf[2][10]; ///< (0.15) LSP coefficients (previous and current frames) (3.2.5)
|
||||||
|
int16_t *lsp[2]; ///< pointers to lsp_buf
|
||||||
|
} G729Context;
|
||||||
|
|
||||||
|
static const G729FormatDescription format_g729_8k = {
|
||||||
|
.ac_index_bits = {8,5},
|
||||||
|
.parity_bit = 1,
|
||||||
|
.gc_1st_index_bits = GC_1ST_IDX_BITS_8K,
|
||||||
|
.gc_2nd_index_bits = GC_2ND_IDX_BITS_8K,
|
||||||
|
.fc_signs_bits = 4,
|
||||||
|
.fc_indexes_bits = 13,
|
||||||
|
};
|
||||||
|
|
||||||
|
static const G729FormatDescription format_g729d_6k4 = {
|
||||||
|
.ac_index_bits = {8,4},
|
||||||
|
.parity_bit = 0,
|
||||||
|
.gc_1st_index_bits = GC_1ST_IDX_BITS_6K4,
|
||||||
|
.gc_2nd_index_bits = GC_2ND_IDX_BITS_6K4,
|
||||||
|
.fc_signs_bits = 2,
|
||||||
|
.fc_indexes_bits = 9,
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief pseudo random number generator
|
||||||
|
*/
|
||||||
|
static inline uint16_t g729_prng(uint16_t value)
|
||||||
|
{
|
||||||
|
return 31821 * value + 13849;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Get parity bit of bit 2..7
|
||||||
|
*/
|
||||||
|
static inline int get_parity(uint8_t value)
|
||||||
|
{
|
||||||
|
return (0x6996966996696996ULL >> (value >> 2)) & 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void lsf_decode(int16_t* lsfq, int16_t* past_quantizer_outputs[MA_NP + 1],
|
||||||
|
int16_t ma_predictor,
|
||||||
|
int16_t vq_1st, int16_t vq_2nd_low, int16_t vq_2nd_high)
|
||||||
|
{
|
||||||
|
int i,j;
|
||||||
|
static const uint8_t min_distance[2]={10, 5}; //(2.13)
|
||||||
|
int16_t* quantizer_output = past_quantizer_outputs[MA_NP];
|
||||||
|
|
||||||
|
for (i = 0; i < 5; i++) {
|
||||||
|
quantizer_output[i] = cb_lsp_1st[vq_1st][i ] + cb_lsp_2nd[vq_2nd_low ][i ];
|
||||||
|
quantizer_output[i + 5] = cb_lsp_1st[vq_1st][i + 5] + cb_lsp_2nd[vq_2nd_high][i + 5];
|
||||||
|
}
|
||||||
|
|
||||||
|
for (j = 0; j < 2; j++) {
|
||||||
|
for (i = 1; i < 10; i++) {
|
||||||
|
int diff = (quantizer_output[i - 1] - quantizer_output[i] + min_distance[j]) >> 1;
|
||||||
|
if (diff > 0) {
|
||||||
|
quantizer_output[i - 1] -= diff;
|
||||||
|
quantizer_output[i ] += diff;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
for (i = 0; i < 10; i++) {
|
||||||
|
int sum = quantizer_output[i] * cb_ma_predictor_sum[ma_predictor][i];
|
||||||
|
for (j = 0; j < MA_NP; j++)
|
||||||
|
sum += past_quantizer_outputs[j][i] * cb_ma_predictor[ma_predictor][j][i];
|
||||||
|
|
||||||
|
lsfq[i] = sum >> 15;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Rotate past_quantizer_outputs. */
|
||||||
|
memmove(past_quantizer_outputs + 1, past_quantizer_outputs, MA_NP * sizeof(int16_t*));
|
||||||
|
past_quantizer_outputs[0] = quantizer_output;
|
||||||
|
|
||||||
|
ff_acelp_reorder_lsf(lsfq, LSFQ_DIFF_MIN, LSFQ_MIN, LSFQ_MAX, 10);
|
||||||
|
}
|
||||||
|
|
||||||
|
static av_cold int decoder_init(AVCodecContext * avctx)
|
||||||
|
{
|
||||||
|
G729Context* ctx = avctx->priv_data;
|
||||||
|
int i,k;
|
||||||
|
|
||||||
|
if (avctx->channels != 1) {
|
||||||
|
av_log(avctx, AV_LOG_ERROR, "Only mono sound is supported (requested channels: %d).\n", avctx->channels);
|
||||||
|
return AVERROR(EINVAL);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Both 8kbit/s and 6.4kbit/s modes uses two subframes per frame. */
|
||||||
|
avctx->frame_size = SUBFRAME_SIZE << 1;
|
||||||
|
|
||||||
|
for (k = 0; k < MA_NP + 1; k++) {
|
||||||
|
ctx->past_quantizer_outputs[k] = ctx->past_quantizer_output_buf[k];
|
||||||
|
for (i = 1; i < 11; i++)
|
||||||
|
ctx->past_quantizer_outputs[k][i - 1] = (18717 * i) >> 3;
|
||||||
|
}
|
||||||
|
|
||||||
|
ctx->lsp[0] = ctx->lsp_buf[0];
|
||||||
|
ctx->lsp[1] = ctx->lsp_buf[1];
|
||||||
|
memcpy(ctx->lsp[0], lsp_init, 10 * sizeof(int16_t));
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
|
||||||
|
AVPacket *avpkt)
|
||||||
|
{
|
||||||
|
const uint8_t *buf = avpkt->data;
|
||||||
|
int buf_size = avpkt->size;
|
||||||
|
int16_t *out_frame = data;
|
||||||
|
GetBitContext gb;
|
||||||
|
G729FormatDescription format;
|
||||||
|
int frame_erasure = 0; ///< frame erasure detected during decoding
|
||||||
|
int bad_pitch = 0; ///< parity check failed
|
||||||
|
int i;
|
||||||
|
G729Context *ctx = avctx->priv_data;
|
||||||
|
int16_t lp[2][11]; // (3.12)
|
||||||
|
uint8_t ma_predictor; ///< switched MA predictor of LSP quantizer
|
||||||
|
uint8_t quantizer_1st; ///< first stage vector of quantizer
|
||||||
|
uint8_t quantizer_2nd_lo; ///< second stage lower vector of quantizer (size in bits)
|
||||||
|
uint8_t quantizer_2nd_hi; ///< second stage higher vector of quantizer (size in bits)
|
||||||
|
|
||||||
|
int pitch_delay_int; // pitch delay, integer part
|
||||||
|
int pitch_delay_3x; // pitch delay, multiplied by 3
|
||||||
|
|
||||||
|
if (*data_size < SUBFRAME_SIZE << 2) {
|
||||||
|
av_log(avctx, AV_LOG_ERROR, "Error processing packet: output buffer too small\n");
|
||||||
|
return AVERROR(EIO);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (buf_size == 10) {
|
||||||
|
format = format_g729_8k;
|
||||||
|
av_log(avctx, AV_LOG_DEBUG, "Packet type: %s\n", "G.729 @ 8kbit/s");
|
||||||
|
} else if (buf_size == 8) {
|
||||||
|
format = format_g729d_6k4;
|
||||||
|
av_log(avctx, AV_LOG_DEBUG, "Packet type: %s\n", "G.729D @ 6.4kbit/s");
|
||||||
|
} else {
|
||||||
|
av_log(avctx, AV_LOG_ERROR, "Packet size %d is unknown.\n", buf_size);
|
||||||
|
return AVERROR_INVALIDDATA;
|
||||||
|
}
|
||||||
|
|
||||||
|
for (i=0; i < buf_size; i++)
|
||||||
|
frame_erasure |= buf[i];
|
||||||
|
frame_erasure = !frame_erasure;
|
||||||
|
|
||||||
|
init_get_bits(&gb, buf, buf_size);
|
||||||
|
|
||||||
|
ma_predictor = get_bits(&gb, 1);
|
||||||
|
quantizer_1st = get_bits(&gb, VQ_1ST_BITS);
|
||||||
|
quantizer_2nd_lo = get_bits(&gb, VQ_2ND_BITS);
|
||||||
|
quantizer_2nd_hi = get_bits(&gb, VQ_2ND_BITS);
|
||||||
|
|
||||||
|
lsf_decode(ctx->lsfq, ctx->past_quantizer_outputs,
|
||||||
|
ma_predictor,
|
||||||
|
quantizer_1st, quantizer_2nd_lo, quantizer_2nd_hi);
|
||||||
|
|
||||||
|
ff_acelp_lsf2lsp(ctx->lsp[1], ctx->lsfq, 10);
|
||||||
|
|
||||||
|
ff_acelp_lp_decode(&lp[0][0], &lp[1][0], ctx->lsp[1], ctx->lsp[0], 10);
|
||||||
|
|
||||||
|
FFSWAP(int16_t*, ctx->lsp[1], ctx->lsp[0]);
|
||||||
|
|
||||||
|
for (i = 0; i < 2; i++) {
|
||||||
|
uint8_t ac_index; ///< adaptive codebook index
|
||||||
|
uint8_t pulses_signs; ///< fixed-codebook vector pulse signs
|
||||||
|
int fc_indexes; ///< fixed-codebook indexes
|
||||||
|
uint8_t gc_1st_index; ///< gain codebook (first stage) index
|
||||||
|
uint8_t gc_2nd_index; ///< gain codebook (second stage) index
|
||||||
|
|
||||||
|
ac_index = get_bits(&gb, format.ac_index_bits[i]);
|
||||||
|
if(!i && format.parity_bit)
|
||||||
|
bad_pitch = get_parity(ac_index) == get_bits1(&gb);
|
||||||
|
fc_indexes = get_bits(&gb, format.fc_indexes_bits);
|
||||||
|
pulses_signs = get_bits(&gb, format.fc_signs_bits);
|
||||||
|
gc_1st_index = get_bits(&gb, format.gc_1st_index_bits);
|
||||||
|
gc_2nd_index = get_bits(&gb, format.gc_2nd_index_bits);
|
||||||
|
|
||||||
|
if(!i) {
|
||||||
|
if (bad_pitch)
|
||||||
|
pitch_delay_3x = 3 * ctx->pitch_delay_int_prev;
|
||||||
|
else
|
||||||
|
pitch_delay_3x = ff_acelp_decode_8bit_to_1st_delay3(ac_index);
|
||||||
|
} else {
|
||||||
|
int pitch_delay_min = av_clip(ctx->pitch_delay_int_prev - 5,
|
||||||
|
PITCH_DELAY_MIN, PITCH_DELAY_MAX - 9);
|
||||||
|
|
||||||
|
if(packet_type == FORMAT_G729D_6K4)
|
||||||
|
pitch_delay_3x = ff_acelp_decode_4bit_to_2nd_delay3(ac_index, pitch_delay_min);
|
||||||
|
else
|
||||||
|
pitch_delay_3x = ff_acelp_decode_5_6_bit_to_2nd_delay3(ac_index, pitch_delay_min);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Round pitch delay to nearest (used everywhere except ff_acelp_interpolate). */
|
||||||
|
pitch_delay_int = (pitch_delay_3x + 1) / 3;
|
||||||
|
|
||||||
|
ff_acelp_weighted_vector_sum(fc + pitch_delay_int,
|
||||||
|
fc + pitch_delay_int,
|
||||||
|
fc, 1 << 14,
|
||||||
|
av_clip(ctx->gain_pitch, SHARP_MIN, SHARP_MAX),
|
||||||
|
0, 14,
|
||||||
|
SUBFRAME_SIZE - pitch_delay_int);
|
||||||
|
|
||||||
|
if (frame_erasure) {
|
||||||
|
ctx->gain_pitch = (29491 * ctx->gain_pitch) >> 15; // 0.90 (0.15)
|
||||||
|
ctx->gain_code = ( 2007 * ctx->gain_code ) >> 11; // 0.98 (0.11)
|
||||||
|
|
||||||
|
gain_corr_factor = 0;
|
||||||
|
} else {
|
||||||
|
ctx->gain_pitch = cb_gain_1st_8k[gc_1st_index][0] +
|
||||||
|
cb_gain_2nd_8k[gc_2nd_index][0];
|
||||||
|
gain_corr_factor = cb_gain_1st_8k[gc_1st_index][1] +
|
||||||
|
cb_gain_2nd_8k[gc_2nd_index][1];
|
||||||
|
|
||||||
|
ff_acelp_weighted_vector_sum(ctx->exc + i * SUBFRAME_SIZE,
|
||||||
|
ctx->exc + i * SUBFRAME_SIZE, fc,
|
||||||
|
(!voicing && frame_erasure) ? 0 : ctx->gain_pitch,
|
||||||
|
( voicing && frame_erasure) ? 0 : ctx->gain_code,
|
||||||
|
1 << 13, 14, SUBFRAME_SIZE);
|
||||||
|
|
||||||
|
ctx->pitch_delay_int_prev = pitch_delay_int;
|
||||||
|
}
|
||||||
|
|
||||||
|
*data_size = SUBFRAME_SIZE << 2;
|
||||||
|
return buf_size;
|
||||||
|
}
|
||||||
|
|
||||||
|
AVCodec ff_g729_decoder =
|
||||||
|
{
|
||||||
|
"g729",
|
||||||
|
AVMEDIA_TYPE_AUDIO,
|
||||||
|
CODEC_ID_G729,
|
||||||
|
sizeof(G729Context),
|
||||||
|
decoder_init,
|
||||||
|
NULL,
|
||||||
|
NULL,
|
||||||
|
decode_frame,
|
||||||
|
.long_name = NULL_IF_CONFIG_SMALL("G.729"),
|
||||||
|
};
|
||||||
@ -150,7 +150,11 @@ void ff_acelp_lp_decode(int16_t* lp_1st, int16_t* lp_2nd, const int16_t* lsp_2nd
|
|||||||
|
|
||||||
/* LSP values for first subframe (3.2.5 of G.729, Equation 24)*/
|
/* LSP values for first subframe (3.2.5 of G.729, Equation 24)*/
|
||||||
for(i=0; i<lp_order; i++)
|
for(i=0; i<lp_order; i++)
|
||||||
|
#ifdef G729_BITEXACT
|
||||||
|
lsp_1st[i] = (lsp_2nd[i] >> 1) + (lsp_prev[i] >> 1);
|
||||||
|
#else
|
||||||
lsp_1st[i] = (lsp_2nd[i] + lsp_prev[i]) >> 1;
|
lsp_1st[i] = (lsp_2nd[i] + lsp_prev[i]) >> 1;
|
||||||
|
#endif
|
||||||
|
|
||||||
ff_acelp_lsp2lpc(lp_1st, lsp_1st, lp_order >> 1);
|
ff_acelp_lsp2lpc(lp_1st, lsp_1st, lp_order >> 1);
|
||||||
|
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user