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Member "ffmpeg-4.0.1/libavcodec/aacenc_quantization_misc.h" (13 Apr 2018, 2098 Bytes) of package /linux/misc/ffmpeg-4.0.1.tar.xz:


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    1 /*
    2  * AAC encoder quantization
    3  * Copyright (C) 2015 Claudio Freire
    4  *
    5  * This file is part of FFmpeg.
    6  *
    7  * FFmpeg is free software; you can redistribute it and/or
    8  * modify it under the terms of the GNU Lesser General Public
    9  * License as published by the Free Software Foundation; either
   10  * version 2.1 of the License, or (at your option) any later version.
   11  *
   12  * FFmpeg is distributed in the hope that it will be useful,
   13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   15  * Lesser General Public License for more details.
   16  *
   17  * You should have received a copy of the GNU Lesser General Public
   18  * License along with FFmpeg; if not, write to the Free Software
   19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
   20  */
   21 
   22 /**
   23  * @file
   24  * AAC encoder quantization misc reusable function templates
   25  * @author Claudio Freire ( klaussfreire gmail com )
   26  */
   27 
   28 #ifndef AVCODEC_AACENC_QUANTIZATION_MISC_H
   29 #define AVCODEC_AACENC_QUANTIZATION_MISC_H
   30 
   31 static inline float quantize_band_cost_cached(struct AACEncContext *s, int w, int g, const float *in,
   32                                 const float *scaled, int size, int scale_idx,
   33                                 int cb, const float lambda, const float uplim,
   34                                 int *bits, float *energy, int rtz)
   35 {
   36     AACQuantizeBandCostCacheEntry *entry;
   37     av_assert1(scale_idx >= 0 && scale_idx < 256);
   38     entry = &s->quantize_band_cost_cache[scale_idx][w*16+g];
   39     if (entry->generation != s->quantize_band_cost_cache_generation || entry->cb != cb || entry->rtz != rtz) {
   40         entry->rd = quantize_band_cost(s, in, scaled, size, scale_idx,
   41                                        cb, lambda, uplim, &entry->bits, &entry->energy, rtz);
   42         entry->cb = cb;
   43         entry->rtz = rtz;
   44         entry->generation = s->quantize_band_cost_cache_generation;
   45     }
   46     if (bits)
   47         *bits = entry->bits;
   48     if (energy)
   49         *energy = entry->energy;
   50     return entry->rd;
   51 }
   52 
   53 #endif /* AVCODEC_AACENC_QUANTIZATION_MISC_H */