[FFmpeg-devel] [PATCH] avcodec/mpegvideo_enc: Initialize dct_unquantize_int(ra|er) only once
Andreas Rheinhardt
andreas.rheinhardt at outlook.com
Sat Oct 29 19:47:00 EEST 2022
Andreas Rheinhardt:
> For encoders, mpeg_quant is an option of the MPEG-4 encoder
> and therefore constant. This implies that one can set
> the dct_unquantize_(intra|inter) function pointers during init.
>
> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>
> ---
> libavcodec/mpegvideo_enc.c | 22 +++++++++++-----------
> 1 file changed, 11 insertions(+), 11 deletions(-)
>
> diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
> index ce363a585d..0b709974a1 100644
> --- a/libavcodec/mpegvideo_enc.c
> +++ b/libavcodec/mpegvideo_enc.c
> @@ -880,6 +880,17 @@ av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
>
> ff_dct_encode_init(s);
>
> + if (s->mpeg_quant || s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
> + s->dct_unquantize_intra = s->dct_unquantize_mpeg2_intra;
> + s->dct_unquantize_inter = s->dct_unquantize_mpeg2_inter;
> + } else if (s->out_format == FMT_H263 || s->out_format == FMT_H261) {
> + s->dct_unquantize_intra = s->dct_unquantize_h263_intra;
> + s->dct_unquantize_inter = s->dct_unquantize_h263_inter;
> + } else {
> + s->dct_unquantize_intra = s->dct_unquantize_mpeg1_intra;
> + s->dct_unquantize_inter = s->dct_unquantize_mpeg1_inter;
> + }
> +
> if ((CONFIG_H263P_ENCODER || CONFIG_RV20_ENCODER) && s->modified_quant)
> s->chroma_qscale_table = ff_h263_chroma_qscale_table;
>
> @@ -1723,17 +1734,6 @@ static int frame_start(MpegEncContext *s)
> }
> }
>
> - if (s->mpeg_quant || s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
> - s->dct_unquantize_intra = s->dct_unquantize_mpeg2_intra;
> - s->dct_unquantize_inter = s->dct_unquantize_mpeg2_inter;
> - } else if (s->out_format == FMT_H263 || s->out_format == FMT_H261) {
> - s->dct_unquantize_intra = s->dct_unquantize_h263_intra;
> - s->dct_unquantize_inter = s->dct_unquantize_h263_inter;
> - } else {
> - s->dct_unquantize_intra = s->dct_unquantize_mpeg1_intra;
> - s->dct_unquantize_inter = s->dct_unquantize_mpeg1_inter;
> - }
> -
> if (s->dct_error_sum) {
> av_assert2(s->noise_reduction && s->encoding);
> update_noise_reduction(s);
Will apply this patch tomorrow unless there are objections.
- Andreas
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