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| author | Andreas Rheinhardt <andreas.rheinhardt@outlook.com> | 2021-08-02 00:24:54 +0200 |
|---|---|---|
| committer | Andreas Rheinhardt <andreas.rheinhardt@outlook.com> | 2021-08-05 19:59:00 +0200 |
| commit | 2b6e008577fa444fc8d1b3a7b985c600633f4ee4 (patch) | |
| tree | 3a30556ed3a67dfee908eee1a3d2e4210fccf895 /libavfilter/qp_table.h | |
| parent | b75dc8bd70ae479452da36e2dcaad6ef007a553f (diff) | |
| download | ffmpeg-2b6e008577fa444fc8d1b3a7b985c600633f4ee4.tar.gz | |
avfilter/internal: Move ff_norm_qscale() to qp_table.h
It is the natural header for it.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Diffstat (limited to 'libavfilter/qp_table.h')
| -rw-r--r-- | libavfilter/qp_table.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/libavfilter/qp_table.h b/libavfilter/qp_table.h index a552fe2e64..4758ee8538 100644 --- a/libavfilter/qp_table.h +++ b/libavfilter/qp_table.h @@ -22,6 +22,7 @@ #include <stdint.h> #include "libavutil/frame.h" +#include "libavcodec/internal.h" /** * Extract a libpostproc-compatible QP table - an 8-bit QP value per 16x16 @@ -30,4 +31,20 @@ int ff_qp_table_extract(AVFrame *frame, int8_t **table, int *table_w, int *table_h, int *qscale_type); +/** + * Normalize the qscale factor + * FIXME the H264 qscale is a log based scale, mpeg1/2 is not, the code below + * cannot be optimal + */ +static inline int ff_norm_qscale(int qscale, int type) +{ + switch (type) { + case FF_QSCALE_TYPE_MPEG1: return qscale; + case FF_QSCALE_TYPE_MPEG2: return qscale >> 1; + case FF_QSCALE_TYPE_H264: return qscale >> 2; + case FF_QSCALE_TYPE_VP56: return (63 - qscale + 2) >> 2; + } + return qscale; +} + #endif // AVFILTER_QP_TABLE_H |