//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);
}
