libmpcodecs/vd_raw.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3
   4 #include "config.h"
   5 #include "mp_msg.h"
   6
   7 #include "vd_internal.h"
   8
   9 static vd_info_t info = {
  10         "RAW Uncompressed Video",
  11         "raw",
  12         "A'rpi",
  13         "A'rpi & Alex",
  14         "uncompressed"
  15 };
  16
  17 LIBVD_EXTERN(raw)
  18
  19 // to set/get/query special features/parameters
  20 static int control(sh_video_t *sh,int cmd,void* arg,...){
  21     int format = sh->bih ? sh->bih->biCompression : sh->format;
  22     switch(cmd){
  23     case VDCTRL_QUERY_FORMAT:
  24         if (*(int *)arg == format) return CONTROL_TRUE;
  25         if (*(int *)arg == IMGFMT_YUY2 && format == MKTAG('y', 'u', 'v', '2')) return CONTROL_TRUE;
  26         return CONTROL_FALSE;
  27     }
  28     return CONTROL_UNKNOWN;
  29 }
  30
  31 // init driver
  32 static int init(sh_video_t *sh){
  33     // set format fourcc for raw RGB:
  34     if(sh->bih && sh->bih->biCompression==0){   // set based on bit depth
  35         switch(sh->bih->biBitCount){
  36         case 1:  sh->bih->biCompression=IMGFMT_BGR1; break;
  37         case 4:  sh->bih->biCompression=IMGFMT_BGR4; break;
  38         case 8:  sh->bih->biCompression=IMGFMT_BGR8; break;
  39         case 15: sh->bih->biCompression=IMGFMT_BGR15; break;
  40         // workaround bitcount==16 => bgr15 case for avi files:
  41         case 16: sh->bih->biCompression=(sh->format)?IMGFMT_BGR16:IMGFMT_BGR15; break;
  42         case 24: sh->bih->biCompression=IMGFMT_BGR24; break;
  43         case 32: sh->bih->biCompression=IMGFMT_BGR32; break;
  44         default:
  45             mp_msg(MSGT_DECVIDEO,MSGL_WARN,"RAW: depth %d not supported\n",sh->bih->biBitCount);
  46         }
  47     }
  48     return mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,sh->bih ? sh->bih->biCompression : sh->format);
  49 }
  50
  51 // uninit driver
  52 static void uninit(sh_video_t *sh){
  53 }
  54
  55 //mp_image_t* mpcodecs_get_image(sh_video_t *sh, int mp_imgtype, int mp_imgflag, int w, int h);
  56
  57 // decode a frame
  58 static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags){
  59     mp_image_t* mpi;
  60     int frame_size;
  61     int format = sh->bih ? sh->bih->biCompression : sh->format;
  62
  63     if(len<=0) return NULL; // skipped frame
  64
  65     mpi=mpcodecs_get_image(sh, MP_IMGTYPE_EXPORT, 0,
  66         sh->disp_w, sh->disp_h);
  67     if(!mpi) return NULL;
  68
  69     if(mpi->flags&MP_IMGFLAG_PLANAR){
  70         // TODO !!!
  71         mpi->planes[0]=data;
  72         mpi->stride[0]=mpi->width;
  73         frame_size=mpi->stride[0]*mpi->h;
  74         if((mpi->imgfmt == IMGFMT_NV12) || (mpi->imgfmt == IMGFMT_NV21))
  75         {
  76             mpi->planes[1]=mpi->planes[0]+mpi->width*mpi->height;
  77             mpi->stride[1]=mpi->chroma_width;
  78             frame_size+=mpi->chroma_width*mpi->chroma_height;
  79         } else if(mpi->flags&MP_IMGFLAG_YUV) {
  80             int cb=2, cr=1;
  81             if(mpi->flags&MP_IMGFLAG_SWAPPED) {
  82                 cb=1; cr=2;
  83             }
  84             // Support for some common Planar YUV formats
  85             /* YV12,I420,IYUV */
  86             mpi->planes[cb]=mpi->planes[0]+mpi->width*mpi->height;
  87             mpi->stride[cb]=mpi->chroma_width;
  88             mpi->planes[cr]=mpi->planes[cb]+mpi->chroma_width*mpi->chroma_height;
  89             mpi->stride[cr]=mpi->chroma_width;
  90             frame_size+=2*mpi->chroma_width*mpi->chroma_height;
  91         }
  92     } else {
  93         mpi->planes[0]=data;
  94         mpi->stride[0]=mpi->width*(mpi->bpp/8);
  95         // .AVI files has uncompressed lines 4-byte aligned:
  96         if(sh->format==0 || sh->format==3) mpi->stride[0]=(mpi->stride[0]+3)&(~3);
  97         if(mpi->imgfmt==IMGFMT_RGB8 || mpi->imgfmt==IMGFMT_BGR8){
  98             // export palette:
  99             mpi->planes[1]=sh->bih ? (unsigned char*)(sh->bih+1) : NULL;
 100 #if 0
 101             printf("Exporting palette: %p !!\n",mpi->planes[1]);
 102             {   unsigned char* p=mpi->planes[1];
 103                 int i;
 104                 for(i=0;i<64;i++) printf("%3d: %02X %02X %02X (%02X)\n",i,p[4*i],p[4*i+1],p[4*i+2],p[4*i+3]);
 105             }
 106 #endif
 107         }
 108         frame_size=mpi->stride[0]*mpi->h;
 109         if (format == MKTAG('y', 'u', 'v', '2')) {
 110           int i;
 111           for (i = 1; i < frame_size; i += 2)
 112             mpi->planes[0][i] ^= 128;
 113         }
 114         if(mpi->bpp<8) frame_size=frame_size*mpi->bpp/8;
 115     }
 116
 117     if(len<frame_size){
 118         mp_msg(MSGT_DECVIDEO,MSGL_WARN,"Frame too small! (%d<%d) Wrong format?\n",
 119             len,frame_size);
 120         return NULL;
 121     }
 122
 123     return mpi;
 124 }