Rémi Denis-Courmont:
> ---
> libavcodec/mpegvideo.c | 40 +++++++++-------------------------------
> 1 file changed, 9 insertions(+), 31 deletions(-)
>
> diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
> index 7af823b8bd..810888fc47 100644
> --- a/libavcodec/mpegvideo.c
> +++ b/libavcodec/mpegvideo.c
> @@ -201,13 +201,11 @@ 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 nCoeffs;
> + int qmul = qscale << 1;
> + int qadd, nCoeffs;
>
> av_assert2(s->block_last_index[n]>=0 || s->h263_aic);
>
> - qmul = qscale << 1;
> -
> if (!s->h263_aic) {
> block[0] *= n < 4 ? s->y_dc_scale : s->c_dc_scale;
> qadd = (qscale - 1) | 1;
> @@ -219,43 +217,20 @@ 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_intra(block, 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 = qscale << 1;
> + int qadd = (qscale - 1) | 1;
> int nCoeffs;
>
> av_assert2(s->block_last_index[n]>=0);
>
> - qadd = (qscale - 1) | 1;
> - 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_inter(block, nCoeffs, qmul, qadd);
What is the cost of these function calls?
> }
>
>
> @@ -275,6 +250,9 @@ static void gray8(uint8_t *dst, const uint8_t *src,
> ptrdiff_t linesize, int h)
> static av_cold int dct_init(MpegEncContext *s)
> {
> ff_blockdsp_init(&s->bdsp);
> +#if CONFIG_H263DSP
> + ff_h263dsp_init(&s->h263dsp);
> +#endif
This ensures that no linking errors happen, but the H.261 codecs will
nevertheless be broken when the H.263 codecs are disabled. In this case
they will try to call a NULL function pointer.
> ff_hpeldsp_init(&s->hdsp, s->avctx->flags);
> ff_videodsp_init(&s->vdsp, s->avctx->bits_per_raw_sample);
>
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