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#include <stdio.h>
#include <stdlib.h>
#include "config.h"
#include "mp_msg.h"
#include "vd_internal.h"
#define TEMP_BUF_SIZE (720*576)
static vd_info_t info = {
"Hauppauge Macroblock/NV12/NV21 Decoder",
"hmblck",
"Alex <d18c7db@hotmail.com>, A'rpi, Alex Beregszaszi",
"Alex <d18c7db@hotmail.com>",
"uncompressed"
};
LIBVD_EXTERN(hmblck)
static void de_macro_y(unsigned char* dst,unsigned char* src,int dstride,int w,int h){
unsigned int y;
// descramble Y plane
for (y=0; y<h; y+=16) {
unsigned int x;
for (x=0; x<w; x+=16) {
unsigned int i;
for (i=0; i<16; i++) {
memcpy(dst + x + (y+i)*dstride, src, 16);
src+=16;
}
}
}
}
static void de_macro_uv(unsigned char* dstu,unsigned char* dstv,unsigned char* src,int dstride,int w,int h){
unsigned int y;
// descramble U/V plane
for (y=0; y<h; y+=16) {
unsigned int x;
for (x=0; x<w; x+=8) {
unsigned int i;
for (i=0; i<16; i++) {
int idx=x + (y+i)*dstride;
dstu[idx+0]=src[0]; dstv[idx+0]=src[1];
dstu[idx+1]=src[2]; dstv[idx+1]=src[3];
dstu[idx+2]=src[4]; dstv[idx+2]=src[5];
dstu[idx+3]=src[6]; dstv[idx+3]=src[7];
dstu[idx+4]=src[8]; dstv[idx+4]=src[9];
dstu[idx+5]=src[10]; dstv[idx+5]=src[11];
dstu[idx+6]=src[12]; dstv[idx+6]=src[13];
dstu[idx+7]=src[14]; dstv[idx+7]=src[15];
src+=16;
}
}
}
}
/*************************************************************************
* convert a nv12 buffer to yv12
*/
static int nv12_to_yv12(unsigned char *data, int len, mp_image_t* mpi, int swapped) {
unsigned int Y_size = mpi->width * mpi->height;
unsigned int UV_size = mpi->chroma_width * mpi->chroma_height;
unsigned int idx;
unsigned char *dst_Y = mpi->planes[0];
unsigned char *dst_U = mpi->planes[1];
unsigned char *dst_V = mpi->planes[2];
unsigned char *src = data + Y_size;
// sanity check raw stream
if ( (len != (Y_size + (UV_size<<1))) ) {
mp_msg(MSGT_DECVIDEO, MSGL_ERR,
"hmblck: Image size inconsistent with data size.\n");
return 0;
}
if ( (mpi->width > 720) || (mpi->height > 576) ) {
mp_msg(MSGT_DECVIDEO,MSGL_ERR,
"hmblck: Image size is too big.\n");
return 0;
}
if (mpi->num_planes != 3) {
mp_msg(MSGT_DECVIDEO,MSGL_ERR,
"hmblck: Incorrect number of image planes.\n");
return 0;
}
// luma data is easy, just copy it
memcpy(dst_Y, data, Y_size);
// chroma data is interlaced UVUV... so deinterlace it
for(idx=0; idx<UV_size; idx++ ) {
*(dst_U + idx) = *(src + (idx<<1) + (swapped ? 1 : 0));
*(dst_V + idx) = *(src + (idx<<1) + (swapped ? 0 : 1));
}
return 1;
}
/*************************************************************************
* set/get/query special features/parameters
*/
static int control(sh_video_t *sh,int cmd, void *arg,...){
return CONTROL_UNKNOWN;
}
/*************************************************************************
* init driver
*/
static int init(sh_video_t *sh){
return mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,sh->format);
}
/*************************************************************************
* uninit driver
*/
static void uninit(sh_video_t *sh){
}
/*************************************************************************
* decode a frame
*/
static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags){
mp_image_t* mpi;
if(len<=0) return NULL; // skipped frame
mpi=mpcodecs_get_image(sh, MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
sh->disp_w, sh->disp_h);
if(!mpi) return NULL;
if(sh->format == IMGFMT_HM12) {
//if(!de_macro(sh, data, len, flags, mpi)) return NULL;
de_macro_y(mpi->planes[0],data,mpi->stride[0],mpi->w,mpi->h);
de_macro_uv(mpi->planes[1],mpi->planes[2],
(unsigned char *)data+mpi->w*mpi->h,mpi->stride[1],
mpi->w/2,mpi->h/2);
} else {
if(!nv12_to_yv12(data, len, mpi,(sh->format == IMGFMT_NV21))) return NULL;
}
return mpi;
}
/*************************************************************************/
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