Re: [FFmpeg-devel] [PATCH 1/2] lavc/mpegvideo: use H263DSP dequant function

[Andreas Rheinhardt <andreas.rheinhardt@outlook.com>]

Rémi Denis-Courmont:
> ---
>  libavcodec/mpegvideo.c | 29 ++++-------------------------
>  1 file changed, 4 insertions(+), 25 deletions(-)
> 
> diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
> index 7af823b8bd..0eb4a1a865 100644
> --- a/libavcodec/mpegvideo.c
> +++ b/libavcodec/mpegvideo.c
> @@ -201,7 +201,7 @@ static void dct_unquantize_mpeg2_inter_c(MpegEncContext *s,
>  static void dct_unquantize_h263_intra_c(MpegEncContext *s,
>                                    int16_t *block, int n, int qscale)
>  {
> -    int i, level, qmul, qadd;
> +    int qmul, qadd;
>      int nCoeffs;
>  
>      av_assert2(s->block_last_index[n]>=0 || s->h263_aic);
> @@ -219,23 +219,13 @@ static void dct_unquantize_h263_intra_c(MpegEncContext *s,
>      else
>          nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ];
>  
> -    for(i=1; i<=nCoeffs; i++) {
> -        level = block[i];
> -        if (level) {
> -            if (level < 0) {
> -                level = level * qmul - qadd;
> -            } else {
> -                level = level * qmul + qadd;
> -            }
> -            block[i] = level;
> -        }
> -    }
> +    s->h263dsp.h263_dct_unquantize(block, 1, nCoeffs, qmul, qadd);
>  }
>  
>  static void dct_unquantize_h263_inter_c(MpegEncContext *s,
>                                    int16_t *block, int n, int qscale)
>  {
> -    int i, level, qmul, qadd;
> +    int qmul, qadd;
>      int nCoeffs;
>  
>      av_assert2(s->block_last_index[n]>=0);
> @@ -244,18 +234,7 @@ static void dct_unquantize_h263_inter_c(MpegEncContext *s,
>      qmul = qscale << 1;
>  
>      nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
> -
> -    for(i=0; i<=nCoeffs; i++) {
> -        level = block[i];
> -        if (level) {
> -            if (level < 0) {
> -                level = level * qmul - qadd;
> -            } else {
> -                level = level * qmul + qadd;
> -            }
> -            block[i] = level;
> -        }
> -    }
> +    s->h263dsp.h263_dct_unquantize(block, 0, nCoeffs, qmul, qadd);
>  }
>  
>  

There is no h263_dct_unquantize in H263DSPContext in master.

- Andreas

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