FFmpeg
mss34dsp.h
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1 /*
2  * Common stuff for some Microsoft Screen codecs
3  * Copyright (C) 2012 Konstantin Shishkov
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 #ifndef AVCODEC_MSS34DSP_H
23 #define AVCODEC_MSS34DSP_H
24 
25 #include <stddef.h>
26 #include <stdint.h>
27 
28 /**
29  * Generate quantisation matrix for given quality.
30  *
31  * @param qmat destination matrix
32  * @param quality quality setting (1-100)
33  * @param luma generate quantisation matrix for luma or chroma
34  */
35 void ff_mss34_gen_quant_mat(uint16_t *qmat, int quality, int luma);
36 
37 /**
38  * Transform and output DCT block.
39  *
40  * @param dst output plane
41  * @param stride output plane stride
42  * @param block block to transform and output
43  */
44 void ff_mss34_dct_put(uint8_t *dst, ptrdiff_t stride, int *block);
45 
46 #endif /* AVCODEC_MSS34DSP_H */
quality
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about quality
Definition: rate_distortion.txt:12
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition: dsp.h:83
stride
#define stride
Definition: h264pred_template.c:537
ff_mss34_gen_quant_mat
void ff_mss34_gen_quant_mat(uint16_t *qmat, int quality, int luma)
Generate quantisation matrix for given quality.
Definition: mss34dsp.c:27
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
ff_mss34_dct_put
void ff_mss34_dct_put(uint8_t *dst, ptrdiff_t stride, int *block)
Transform and output DCT block.
Definition: mss34dsp.c:69
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