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| author | Paul B Mahol <onemda@gmail.com> | 2023-09-17 12:51:16 +0200 |
|---|---|---|
| committer | Paul B Mahol <onemda@gmail.com> | 2023-09-17 12:55:56 +0200 |
| commit | 5acc3c4cff88de1ced1c4d9c6070b708613b43c1 (patch) | |
| tree | ef2f3cf9b234e64bd5a613a0218708605dadd35c /libavcodec/vmixdec.c | |
| parent | 9e1ea3caba5effaf9c7596dc178bd457439d638f (diff) | |
| download | ffmpeg-5acc3c4cff88de1ced1c4d9c6070b708613b43c1.tar.gz | |
avcodec/vmixdec: improve quality factors
Diffstat (limited to 'libavcodec/vmixdec.c')
| -rw-r--r-- | libavcodec/vmixdec.c | 29 |
1 files changed, 12 insertions, 17 deletions
diff --git a/libavcodec/vmixdec.c b/libavcodec/vmixdec.c index 61f97c1bb4..962ab8339b 100644 --- a/libavcodec/vmixdec.c +++ b/libavcodec/vmixdec.c @@ -55,22 +55,17 @@ typedef struct VMIXContext { IDCTDSPContext idsp; } VMIXContext; -static const uint8_t quality[256] = { - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 64, 56, 52, 48, 44, - 12, 36, 32, 28, 24, 22, 20, 18, 16, 14, 12, 10, 8, 7, 6, 5, - 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, - 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, +static const uint8_t quality[] = { + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1,64,63,62,61, + 60,59,58,57,56,55,54,53,52,51, + 50,49,48,47,46,45,44,43,42,41, + 40,39,38,37,36,35,34,33,32,31, + 30,29,28,27,26,25,24,23,22,21, + 20,19,18,17,16,15,14,13,12,11, + 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, }; static const uint8_t quant[64] = { @@ -240,7 +235,7 @@ static int decode_frame(AVCodecContext *avctx, else if (offset != 3) return AVERROR_INVALIDDATA; - q = quality[avpkt->data[offset - 2]]; + q = quality[FFMIN(avpkt->data[offset - 2], FF_ARRAY_ELEMS(quality)-1)]; for (int n = 0; n < 64; n++) s->factors[n] = quant[n] * q; |