1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
19 #ifndef AVFILTER_QP_TABLE_H
20 #define AVFILTER_QP_TABLE_H
21
22 #include <stdint.h>
23
24 #include "libavutil/frame.h"
25 #include "libavutil/video_enc_params.h"
26
27 /**
28 * Extract a libpostproc-compatible QP table - an 8-bit QP value per 16x16
29 * macroblock, stored in raster order - from AVVideoEncParams side data.
30 */
31 int ff_qp_table_extract(AVFrame *frame, int8_t **table, int *table_w, int *table_h,
32 enum AVVideoEncParamsType *qscale_type);
33
34 /**
35 * Normalize the qscale factor
36 * FIXME Add support for other values of enum AVVideoEncParamsType
37 * besides AV_VIDEO_ENC_PARAMS_MPEG2.
38 */
ff_norm_qscale(int qscale,enum AVVideoEncParamsType type)39 static inline int ff_norm_qscale(int qscale, enum AVVideoEncParamsType type)
40 {
41 switch (type) {
42 case AV_VIDEO_ENC_PARAMS_MPEG2: return qscale >> 1;
43 }
44 return qscale;
45 }
46
47 #endif // AVFILTER_QP_TABLE_H
48