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mpv/libmpcodecs/vf_scale.c

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "../config.h"
#include "../mp_msg.h"
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#include "../libvo/fastmemcpy.h"
#include "../postproc/swscale.h"
struct vf_priv_s {
int w,h;
int v_chr_drop;
int param;
unsigned int fmt;
SwsContext *ctx;
unsigned char* palette;
};
extern int opt_screen_size_x;
extern int opt_screen_size_y;
//===========================================================================//
static unsigned int outfmt_list[]={
// RGB:
IMGFMT_BGR32,
IMGFMT_RGB32,
IMGFMT_BGR24,
IMGFMT_RGB24,
IMGFMT_BGR16,
IMGFMT_RGB16,
IMGFMT_BGR15,
IMGFMT_RGB15,
IMGFMT_BGR8,
IMGFMT_RGB8,
IMGFMT_BGR4,
IMGFMT_RGB4,
IMGFMT_BGR1,
IMGFMT_RGB1,
// YUV:
IMGFMT_444P,
IMGFMT_422P,
IMGFMT_YV12,
IMGFMT_I420,
IMGFMT_IYUV,
IMGFMT_YVU9,
IMGFMT_IF09,
IMGFMT_411P,
IMGFMT_Y800,
IMGFMT_Y8,
IMGFMT_YUY2,
0
};
static unsigned int find_best_out(vf_instance_t *vf){
unsigned int best=0;
unsigned int* p=outfmt_list;
// find the best outfmt:
while(*p){
int ret=vf_next_query_format(vf,*p);
mp_msg(MSGT_VFILTER,MSGL_V,"scale: query(%s) -> %d\n",vo_format_name(*p),ret&3);
if(ret&VFCAP_CSP_SUPPORTED_BY_HW){ best=*p; break;} // no conversion -> bingo!
if(ret&VFCAP_CSP_SUPPORTED && !best) best=*p; // best with conversion
++p;
}
return best;
}
static int config(struct vf_instance_s* vf,
int width, int height, int d_width, int d_height,
unsigned int flags, unsigned int outfmt){
unsigned int best=find_best_out(vf);
int vo_flags;
int int_sws_flags=0;
SwsFilter *srcFilter, *dstFilter;
if(!best){
mp_msg(MSGT_VFILTER,MSGL_WARN,"SwScale: no supported outfmt found :(\n");
return 0;
}
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;
}
}
// calculate the missing parameters:
switch(best) {
case IMGFMT_YUY2: /* YUY2 needs w rounded to 2 */
if(vf->priv->w==-3) vf->priv->w=(vf->priv->h*width/height+1)&~1; else
if(vf->priv->w==-2) vf->priv->w=(vf->priv->h*d_width/d_height+1)&~1;
if(vf->priv->w<0) vf->priv->w=width; else
if(vf->priv->w==0) vf->priv->w=d_width;
if(vf->priv->h==-3) vf->priv->h=vf->priv->w*height/width; else
if(vf->priv->h==-2) vf->priv->h=vf->priv->w*d_height/d_width;
break;
case IMGFMT_YV12: /* YV12 needs w & h rounded to 2 */
if(vf->priv->w==-3) vf->priv->w=(vf->priv->h*width/height+1)&~1; else
if(vf->priv->w==-2) vf->priv->w=(vf->priv->h*d_width/d_height+1)&~1;
if(vf->priv->w<0) vf->priv->w=width; else
if(vf->priv->w==0) vf->priv->w=d_width;
if(vf->priv->h==-3) vf->priv->h=(vf->priv->w*height/width+1)&~1; else
if(vf->priv->h==-2) vf->priv->h=(vf->priv->w*d_height/d_width+1)&~1;
break;
default:
if(vf->priv->w==-3) vf->priv->w=vf->priv->h*width/height; else
if(vf->priv->w==-2) vf->priv->w=vf->priv->h*d_width/d_height;
if(vf->priv->w<0) vf->priv->w=width; else
if(vf->priv->w==0) vf->priv->w=d_width;
if(vf->priv->h==-3) vf->priv->h=vf->priv->w*height/width; else
if(vf->priv->h==-2) vf->priv->h=vf->priv->w*d_height/d_width;
break;
}
if(vf->priv->h<0) vf->priv->h=height; else
if(vf->priv->h==0) vf->priv->h=d_height;
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) freeSwsContext(vf->priv->ctx);
// new swscaler:
swsGetFlagsAndFilterFromCmdLine(&int_sws_flags, &srcFilter, &dstFilter);
int_sws_flags|= vf->priv->v_chr_drop << SWS_SRC_V_CHR_DROP_SHIFT;
int_sws_flags|= vf->priv->param << SWS_PARAM_SHIFT;
vf->priv->ctx=getSwsContext(width,height,
(outfmt==IMGFMT_I420 || outfmt==IMGFMT_IYUV)?IMGFMT_YV12:outfmt,
vf->priv->w,vf->priv->h,
(best==IMGFMT_I420 || best==IMGFMT_IYUV)?IMGFMT_YV12:best,
int_sws_flags, srcFilter, dstFilter);
if(!vf->priv->ctx){
// error...
mp_msg(MSGT_VFILTER,MSGL_WARN,"Couldn't init SwScaler for this setup\n");
return 0;
}
vf->priv->fmt=best;
if(vf->priv->palette){
free(vf->priv->palette);
vf->priv->palette=NULL;
}
switch(best){
case IMGFMT_BGR8: {
/* set 332 palette for 8 bpp */
int i;
vf->priv->palette=malloc(4*256);
for(i=0; i<256; i++){
vf->priv->palette[4*i+0]=4*(i&3)*21;
vf->priv->palette[4*i+1]=4*((i>>2)&7)*9;
vf->priv->palette[4*i+2]=4*((i>>5)&7)*9;
}
break; }
case IMGFMT_BGR4: {
int i;
vf->priv->palette=malloc(4*16);
for(i=0; i<16; i++){
vf->priv->palette[4*i+0]=4*(i&1)*63;
vf->priv->palette[4*i+1]=4*((i>>1)&3)*21;
vf->priv->palette[4*i+2]=4*((i>>3)&1)*63;
}
break; }
}
if(!opt_screen_size_x && !opt_screen_size_y){
d_width=d_width*vf->priv->w/width;
d_height=d_height*vf->priv->h/height;
}
return vf_next_config(vf,vf->priv->w,vf->priv->h,d_width,d_height,flags,best);
}
static int put_image(struct vf_instance_s* vf, mp_image_t *mpi){
mp_image_t *dmpi;
// hope we'll get DR buffer:
dmpi=vf_get_image(vf->next,vf->priv->fmt,
MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
vf->priv->w, vf->priv->h);
vf->priv->ctx->swScale(vf->priv->ctx,mpi->planes,mpi->stride,0,mpi->h,dmpi->planes,dmpi->stride);
if(vf->priv->w==mpi->w && vf->priv->h==mpi->h){
// just conversion, no scaling -> keep postprocessing data
// this way we can apply pp filter to non-yv12 source using scaler
dmpi->qscale=mpi->qscale;
dmpi->qstride=mpi->qstride;
}
if(vf->priv->palette) dmpi->planes[1]=vf->priv->palette; // export palette!
return vf_next_put_image(vf,dmpi);
}
//===========================================================================//
// supported Input formats: YV12, I420, IYUV, YUY2, BGR32, BGR24, BGR16, BGR15, RGB32, RGB24, Y8, Y800
static int query_format(struct vf_instance_s* vf, unsigned int fmt){
switch(fmt){
case IMGFMT_YV12:
case IMGFMT_I420:
case IMGFMT_IYUV:
case IMGFMT_YUY2:
case IMGFMT_BGR32:
case IMGFMT_BGR24:
case IMGFMT_BGR16:
case IMGFMT_BGR15:
case IMGFMT_RGB32:
case IMGFMT_RGB24:
case IMGFMT_Y800:
case IMGFMT_Y8:
case IMGFMT_YVU9:
case IMGFMT_IF09:
case IMGFMT_444P:
case IMGFMT_422P:
case IMGFMT_411P:
{
unsigned int best=find_best_out(vf);
int flags;
if(!best) return 0; // no matching out-fmt
flags=vf_next_query_format(vf,best);
if(!(flags&3)) return 0; // huh?
if(fmt!=best) flags&=~VFCAP_CSP_SUPPORTED_BY_HW;
// do not allow scaling, if we are before the PP fliter!
if(!(flags&VFCAP_POSTPROC)) flags|=VFCAP_SWSCALE;
return flags;
}
}
return 0; // nomatching in-fmt
}
static int open(vf_instance_t *vf, char* args){
vf->config=config;
vf->put_image=put_image;
vf->query_format=query_format;
vf->priv=malloc(sizeof(struct vf_priv_s));
// TODO: parse args ->
vf->priv->ctx=NULL;
vf->priv->w=
vf->priv->h=-1;
vf->priv->v_chr_drop=0;
vf->priv->param=0;
vf->priv->palette=NULL;
if(args) sscanf(args, "%d:%d:%d:%d",
&vf->priv->w,
&vf->priv->h,
&vf->priv->v_chr_drop,
&vf->priv->param);
mp_msg(MSGT_VFILTER,MSGL_V,"SwScale params: %d x %d (-1=no scaling)\n",
vf->priv->w,
vf->priv->h);
return 1;
}
vf_info_t vf_info_scale = {
"software scaling",
"scale",
"A'rpi",
"",
open
};
//===========================================================================//
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