//exact copy from vf_scale.c // will use sws_flags & src_filter (from cmd line) struct SwsContext *sws_getContextFromCmdLine(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat) { int flags, i; SwsFilter *dstFilterParam, *srcFilterParam; enum PixelFormat dfmt, sfmt; for(i=0; conversion_map[i].fmt && dstFormat != conversion_map[i].fmt; i++); dfmt= conversion_map[i].pix_fmt; for(i=0; conversion_map[i].fmt && srcFormat != conversion_map[i].fmt; i++); sfmt= conversion_map[i].pix_fmt; if (srcFormat == IMGFMT_RGB8 || srcFormat == IMGFMT_BGR8) sfmt = PIX_FMT_PAL8; sws_getFlagsAndFilterFromCmdLine(&flags, &srcFilterParam, &dstFilterParam); return sws_getContext(srcW, srcH, sfmt, dstW, dstH, dfmt, flags | get_sws_cpuflags(), srcFilterParam, dstFilterParam, NULL); }
static int config(struct vf_instance *vf, int width, int height, int d_width, int d_height, unsigned int flags, unsigned int outfmt){ unsigned int best=find_best_out(vf, outfmt); int vo_flags; int int_sws_flags=0; int round_w=0, round_h=0; int i; SwsFilter *srcFilter, *dstFilter; enum PixelFormat dfmt, sfmt; if(!best){ mp_msg(MSGT_VFILTER,MSGL_WARN,"SwScale: no supported outfmt found :(\n"); return 0; } sfmt = imgfmt2pixfmt(outfmt); if (outfmt == IMGFMT_RGB8 || outfmt == IMGFMT_BGR8) sfmt = PIX_FMT_PAL8; dfmt = imgfmt2pixfmt(best); vo_flags=vf->next->query_format(vf->next,best); // scaling to dwidth*d_height, if all these TRUE: // - option -zoom // - no other sw/hw up/down scaling avail. // - we're after postproc // - user didn't set w:h if(!(vo_flags&VFCAP_POSTPROC) && (flags&4) && vf->priv->w<0 && vf->priv->h<0){ // -zoom int x=(vo_flags&VFCAP_SWSCALE) ? 0 : 1; if(d_width<width || d_height<height){ // downscale! if(vo_flags&VFCAP_HWSCALE_DOWN) x=0; } else { // upscale: if(vo_flags&VFCAP_HWSCALE_UP) x=0; } if(x){ // user wants sw scaling! (-zoom) vf->priv->w=d_width; vf->priv->h=d_height; } } if(vf->priv->noup){ if((vf->priv->w > width) + (vf->priv->h > height) >= vf->priv->noup){ vf->priv->w= width; vf->priv->h= height; } } if (vf->priv->w <= -8) { vf->priv->w += 8; round_w = 1; } if (vf->priv->h <= -8) { vf->priv->h += 8; round_h = 1; } if (vf->priv->w < -3 || vf->priv->h < -3 || (vf->priv->w < -1 && vf->priv->h < -1)) { // TODO: establish a direct connection to the user's brain // and find out what the heck he thinks MPlayer should do // with this nonsense. mp_msg(MSGT_VFILTER, MSGL_ERR, "SwScale: EUSERBROKEN Check your parameters, they make no sense!\n"); return 0; } if (vf->priv->w == -1) vf->priv->w = width; if (vf->priv->w == 0) vf->priv->w = d_width; if (vf->priv->h == -1) vf->priv->h = height; if (vf->priv->h == 0) vf->priv->h = d_height; if (vf->priv->w == -3) vf->priv->w = vf->priv->h * width / height; if (vf->priv->w == -2) vf->priv->w = vf->priv->h * d_width / d_height; if (vf->priv->h == -3) vf->priv->h = vf->priv->w * height / width; if (vf->priv->h == -2) vf->priv->h = vf->priv->w * d_height / d_width; if (round_w) vf->priv->w = ((vf->priv->w + 8) / 16) * 16; if (round_h) vf->priv->h = ((vf->priv->h + 8) / 16) * 16; // calculate the missing parameters: switch(best) { case IMGFMT_YV12: /* YV12 needs w & h rounded to 2 */ case IMGFMT_I420: case IMGFMT_IYUV: case IMGFMT_NV12: case IMGFMT_NV21: vf->priv->h = (vf->priv->h + 1) & ~1; case IMGFMT_YUY2: /* YUY2 needs w rounded to 2 */ case IMGFMT_UYVY: vf->priv->w = (vf->priv->w + 1) & ~1; } mp_msg(MSGT_VFILTER,MSGL_DBG2,"SwScale: scaling %dx%d %s to %dx%d %s \n", width,height,vo_format_name(outfmt), vf->priv->w,vf->priv->h,vo_format_name(best)); // free old ctx: if(vf->priv->ctx) sws_freeContext(vf->priv->ctx); if(vf->priv->ctx2)sws_freeContext(vf->priv->ctx2); // new swscaler: sws_getFlagsAndFilterFromCmdLine(&int_sws_flags, &srcFilter, &dstFilter); int_sws_flags|= vf->priv->v_chr_drop << SWS_SRC_V_CHR_DROP_SHIFT; int_sws_flags|= vf->priv->accurate_rnd * SWS_ACCURATE_RND; vf->priv->ctx=sws_getContext(width, height >> vf->priv->interlaced, sfmt, vf->priv->w, vf->priv->h >> vf->priv->interlaced, dfmt, int_sws_flags | get_sws_cpuflags(), srcFilter, dstFilter, vf->priv->param); if(vf->priv->interlaced){ vf->priv->ctx2=sws_getContext(width, height >> 1, sfmt, vf->priv->w, vf->priv->h >> 1, dfmt, int_sws_flags | get_sws_cpuflags(), srcFilter, dstFilter, vf->priv->param); }