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  • Committer: Package Import Robot
  • Author(s): Sebastian Dröge
  • Date: 2013-09-24 17:07:00 UTC
  • mfrom: (1.1.17) (7.1.9 experimental)
  • Revision ID: package-import@ubuntu.com-20130924170700-4dg62s3pwl0pdakz
Tags: 1.2.0-1
* New upstream stable release:
  + debian/control:
    - Build depend on GStreamer and gst-plugins-base >= 1.2.0.

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gst-libs/ext/libav/libavcodec/acelp_pitch_delay.c
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include "libavutil/common.h"
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#include "libavutil/mathematics.h"
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#include "avcodec.h"
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#include "dsputil.h"
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    if(erasure)
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        quant_energy[0] = FFMAX(avg_gain >> log2_ma_pred_order, -10240) - 4096; // -10 and -4 in (5.10)
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    else
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        quant_energy[0] = (6165 * ((ff_log2(gain_corr_factor) >> 2) - (13 << 13))) >> 13;
 
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        quant_energy[0] = (6165 * ((ff_log2_q15(gain_corr_factor) >> 2) - (13 << 13))) >> 13;
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}
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int16_t ff_acelp_decode_gain_code(
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        mr_energy += quant_energy[i] * ma_prediction_coeff[i];
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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));
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    return mr_energy >> 12;
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}
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    // Note 10^(0.05 * -10log(average x2)) = 1/sqrt((average x2)).
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    float val = fixed_gain_factor *
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        exp2f(M_LOG2_10 * 0.05 *
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              (ff_dot_productf(pred_table, prediction_error, 4) +
 
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              (ff_scalarproduct_float_c(pred_table, prediction_error, 4) +
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               energy_mean)) /
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        sqrtf(fixed_mean_energy);
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