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vf_mirror: rewrite

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Properly handle odd image sizes. Probably makes it work with more image
formats.
This commit is contained in:
wm4 2012-12-26 21:27:53 +01:00
parent e0d028e89b
commit 92a1b6fa21
1 changed files with 52 additions and 65 deletions
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117
video/filter/vf_mirror.c
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@ -28,90 +28,77 @@
#include "video/mp_image.h"
#include "vf.h"
static int config(struct vf_instance *vf, int width, int height,
int d_width, int d_height,
unsigned int flags, unsigned int fmt)
{
struct mp_imgfmt_desc desc = mp_imgfmt_get_desc(fmt);
int a_w = MP_ALIGN_DOWN(width, desc.align_x);
vf_rescale_dsize(vf, &d_width, &d_height, width, height, a_w, height);
return vf_next_config(vf, a_w, height, d_width, d_height, flags, fmt);
}
static void mirror(unsigned char* dst,unsigned char* src,int dststride,int srcstride,int w,int h,int bpp,unsigned int fmt){
int y;
for(y=0;y<h;y++){
int x;
switch(bpp){
case 1:
for(x=0;x<w;x++) dst[x]=src[w-x-1];
break;
case 2:
switch(fmt){
case IMGFMT_UYVY: {
// packed YUV is tricky. U,V are 32bpp while Y is 16bpp:
int w2=w>>1;
for(x=0;x<w2;x++){
// TODO: optimize this...
dst[x*4+0]=src[0+(w2-x-1)*4];
dst[x*4+1]=src[3+(w2-x-1)*4];
dst[x*4+2]=src[2+(w2-x-1)*4];
dst[x*4+3]=src[1+(w2-x-1)*4];
}
break; }
case IMGFMT_YUYV: {
// packed YUV is tricky. U,V are 32bpp while Y is 16bpp:
int w2=w>>1;
for(x=0;x<w2;x++){
// TODO: optimize this...
dst[x*4+0]=src[2+(w2-x-1)*4];
dst[x*4+1]=src[1+(w2-x-1)*4];
dst[x*4+2]=src[0+(w2-x-1)*4];
dst[x*4+3]=src[3+(w2-x-1)*4];
}
break; }
default:
for(x=0;x<w;x++) *((short*)(dst+x*2))=*((short*)(src+(w-x-1)*2));
}
break;
case 3:
for(x=0;x<w;x++){
dst[x*3+0]=src[0+(w-x-1)*3];
dst[x*3+1]=src[1+(w-x-1)*3];
dst[x*3+2]=src[2+(w-x-1)*3];
}
break;
case 4:
for(x=0;x<w;x++) *((int*)(dst+x*4))=*((int*)(src+(w-x-1)*4));
}
src+=srcstride;
dst+=dststride;
static inline void mirror_4_m(uint8_t *dst, uint8_t *src, int p,
int c0, int c1, int c2, int c3)
{
for (int x = 0; x < p; x++) {
dst[x * 4 + 0] = src[(p - x - 1) * 4 + c0];
dst[x * 4 + 1] = src[(p - x - 1) * 4 + c1];
dst[x * 4 + 2] = src[(p - x - 1) * 4 + c2];
dst[x * 4 + 3] = src[(p - x - 1) * 4 + c3];
}
}
//===========================================================================//
static inline void mirror(uint8_t *dst, uint8_t *src, int bp, int w)
{
for (int x = 0; x < w; x++)
memcpy(dst + x * bp, src + (w - x - 1) * bp, bp);
}
static struct mp_image *filter(struct vf_instance *vf, struct mp_image *mpi)
{
mp_image_t *dmpi = vf_alloc_out_image(vf);
mp_image_copy_attributes(dmpi, mpi);
if(mpi->flags&MP_IMGFLAG_PLANAR){
mirror(dmpi->planes[0],mpi->planes[0],
dmpi->stride[0],mpi->stride[0],
dmpi->w,dmpi->h,1,mpi->imgfmt);
mirror(dmpi->planes[1],mpi->planes[1],
dmpi->stride[1],mpi->stride[1],
dmpi->w>>mpi->chroma_x_shift,dmpi->h>>mpi->chroma_y_shift,1,mpi->imgfmt);
mirror(dmpi->planes[2],mpi->planes[2],
dmpi->stride[2],mpi->stride[2],
dmpi->w>>mpi->chroma_x_shift,dmpi->h>>mpi->chroma_y_shift,1,mpi->imgfmt);
} else {
mirror(dmpi->planes[0],mpi->planes[0],
dmpi->stride[0],mpi->stride[0],
dmpi->w,dmpi->h,dmpi->bpp>>3,mpi->imgfmt);
for (int p = 0; p < mpi->num_planes; p++) {
for (int y = 0; y < mpi->plane_h[p]; y++) {
void *p_src = mpi->planes[p] + mpi->stride[p] * y;
void *p_dst = dmpi->planes[p] + dmpi->stride[p] * y;
int w = dmpi->plane_w[p];
if (mpi->imgfmt == IMGFMT_YUYV) {
mirror_4_m(p_dst, p_src, w / 2, 2, 1, 0, 3);
} else if (mpi->imgfmt == IMGFMT_UYVY) {
mirror_4_m(p_dst, p_src, w / 2, 0, 3, 2, 1);
} else {
// make the compiler unroll the memcpy in mirror()
switch (mpi->fmt.bytes[p]) {
case 1: mirror(p_dst, p_src, 1, w); break;
case 2: mirror(p_dst, p_src, 2, w); break;
case 3: mirror(p_dst, p_src, 3, w); break;
case 4: mirror(p_dst, p_src, 4, w); break;
default:
mirror(p_dst, p_src, mpi->fmt.bytes[p], w);
}
}
}
}
talloc_free(mpi);
return dmpi;
}
//===========================================================================//
static int query_format(struct vf_instance *vf, unsigned int fmt)
{
struct mp_imgfmt_desc desc = mp_imgfmt_get_desc(fmt);
if (!(desc.flags & MP_IMGFLAG_BYTE_ALIGNED))
return 0;
return vf_next_query_format(vf, fmt);
}
static int vf_open(vf_instance_t *vf, char *args){
//vf->config=config;
vf->config=config;
vf->filter=filter;
vf->query_format=query_format;
return 1;
}