double ff_eval2(const char *s, double *const_value, const char **const_name,
double (**func1)(void *, double), const char **func1_name,
double (**func2)(void *, double, double), char **func2_name,
void *opaque, const char **error){
AVEvalExpr * e = ff_parse(s, const_name, func1, func1_name, func2, func2_name, error);
double d;
if (!e) return 0;//NAN;
d = ff_parse_eval(e, const_value, opaque);
ff_eval_free(e);
return d;
}
static int put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts){
mp_image_t *dmpi;
int x,y, plane;
if(!(mpi->flags&MP_IMGFLAG_DIRECT)){
// no DR, so get a new image! hope we'll get DR buffer:
vf->dmpi=vf_get_image(vf->next,mpi->imgfmt, MP_IMGTYPE_TEMP,
MP_IMGFLAG_ACCEPT_STRIDE|MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
mpi->w,mpi->h);
}
dmpi= vf->dmpi;
vf->priv->mpi= mpi;
vf_clone_mpi_attributes(dmpi, mpi);
for(plane=0; plane<3; plane++){
int w= mpi->w >> (plane ? mpi->chroma_x_shift : 0);
int h= mpi->h >> (plane ? mpi->chroma_y_shift : 0);
uint8_t *dst = dmpi->planes[plane];
int dst_stride= dmpi->stride[plane];
double const_values[]={
M_PI,
M_E,
0,
0,
w,
h,
vf->priv->framenum,
w/(double)mpi->w,
h/(double)mpi->h,
0
};
if (!vf->priv->e[plane]) continue;
for(y=0; y<h; y++){
const_values[3]=y;
for(x=0; x<w; x++){
const_values[2]=x;
dst[x+y* dst_stride]= ff_parse_eval(vf->priv->e[plane], const_values, vf);
}
}
}
vf->priv->framenum++;
return vf_next_put_image(vf,dmpi, pts);
}
/**
* modifies the bitrate curve from pass1 for one frame
*/
static double get_qscale(MpegEncContext *s, RateControlEntry *rce, double rate_factor, int frame_num){
RateControlContext *rcc= &s->rc_context;
AVCodecContext *a= s->avctx;
double q, bits;
const int pict_type= rce->new_pict_type;
const double mb_num= s->mb_num;
int i;
double const_values[]={
M_PI,
M_E,
rce->i_tex_bits*rce->qscale,
rce->p_tex_bits*rce->qscale,
(rce->i_tex_bits + rce->p_tex_bits)*(double)rce->qscale,
rce->mv_bits/mb_num,
rce->pict_type == FF_B_TYPE ? (rce->f_code + rce->b_code)*0.5 : rce->f_code,
rce->i_count/mb_num,
rce->mc_mb_var_sum/mb_num,
rce->mb_var_sum/mb_num,
rce->pict_type == FF_I_TYPE,
rce->pict_type == FF_P_TYPE,
rce->pict_type == FF_B_TYPE,
rcc->qscale_sum[pict_type] / (double)rcc->frame_count[pict_type],
a->qcompress,
/* rcc->last_qscale_for[FF_I_TYPE],
rcc->last_qscale_for[FF_P_TYPE],
rcc->last_qscale_for[FF_B_TYPE],
rcc->next_non_b_qscale,*/
rcc->i_cplx_sum[FF_I_TYPE] / (double)rcc->frame_count[FF_I_TYPE],
rcc->i_cplx_sum[FF_P_TYPE] / (double)rcc->frame_count[FF_P_TYPE],
rcc->p_cplx_sum[FF_P_TYPE] / (double)rcc->frame_count[FF_P_TYPE],
rcc->p_cplx_sum[FF_B_TYPE] / (double)rcc->frame_count[FF_B_TYPE],
(rcc->i_cplx_sum[pict_type] + rcc->p_cplx_sum[pict_type]) / (double)rcc->frame_count[pict_type],
0
};
bits= ff_parse_eval(rcc->rc_eq_eval, const_values, rce);
#ifdef __GNUC__
if (isnan(bits)) {
av_log(s->avctx, AV_LOG_ERROR, "Error evaluating rc_eq \"%s\"\n", s->avctx->rc_eq);
return -1;
}
#endif
rcc->pass1_rc_eq_output_sum+= bits;
bits*=rate_factor;
if(bits<0.0) bits=0.0;
bits+= 1.0; //avoid 1/0 issues
/* user override */
for(i=0; i<s->avctx->rc_override_count; i++){
RcOverride *rco= s->avctx->rc_override;
if(rco[i].start_frame > frame_num) continue;
if(rco[i].end_frame < frame_num) continue;
if(rco[i].qscale)
bits= qp2bits(rce, rco[i].qscale); //FIXME move at end to really force it?
else
bits*= rco[i].quality_factor;
}
q= bits2qp(rce, bits);
/* I/B difference */
if (pict_type==FF_I_TYPE && s->avctx->i_quant_factor<0.0)
q= -q*s->avctx->i_quant_factor + s->avctx->i_quant_offset;
else if(pict_type==FF_B_TYPE && s->avctx->b_quant_factor<0.0)
q= -q*s->avctx->b_quant_factor + s->avctx->b_quant_offset;
if(q<1) q=1;
return q;
}