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#include <stdlib.h> /* malloc */
#include <string.h> /* memset */
static int init(priv_t *priv);
static int uninit(priv_t *priv);
static int control(priv_t *priv, int cmd, void *arg);
static int start(priv_t *priv);
static double grab_video_frame(priv_t *priv, char *buffer, int len);
static int get_video_framesize(priv_t *priv);
static double grab_audio_frame(priv_t *priv, char *buffer, int len);
static int get_audio_framesize(priv_t *priv);
int teletext_control(void* p, int cmd, void *arg);
static tvi_functions_t functions =
{
init,
uninit,
control,
start,
grab_video_frame,
get_video_framesize,
grab_audio_frame,
get_audio_framesize
};
static tvi_handle_t *new_handle(void)
{
tvi_handle_t *h = (tvi_handle_t *)malloc(sizeof(tvi_handle_t));
if (!h)
return(NULL);
h->priv = (priv_t *)malloc(sizeof(priv_t));
if (!h->priv)
{
free(h);
return(NULL);
}
memset(h->priv, 0, sizeof(priv_t));
h->functions = &functions;
h->seq = 0;
h->chanlist = -1;
h->chanlist_s = NULL;
h->norm = -1;
h->channel = -1;
h->scan = NULL;
return(h);
}
static void free_handle(tvi_handle_t *h)
{
if (h) {
if (h->priv)
free(h->priv);
if (h->scan)
free(h->scan);
free(h);
}
}
/**
Fills video frame in given buffer with blue color for yv12,i420,uyvy,yuy2.
Other formats will be filled with 0xC0
*/
static inline void fill_blank_frame(char* buffer,int len,int fmt){
int i;
// RGB(0,0,255) <-> YVU(41,110,240)
switch(fmt){
case IMGFMT_YV12:
memset(buffer, 41,4*len/6); //Y
memset(buffer+4*len/6, 110,len/6);//V
memset(buffer+5*len/6, 240,len/6);//U
break;
case IMGFMT_I420:
memset(buffer, 41,4*len/6); //Y
memset(buffer+4*len/6, 240,len/6);//U
memset(buffer+5*len/6, 110,len/6);//V
break;
case IMGFMT_UYVY:
for(i=0;i<len;i+=4){
buffer[i]=0xFF;
buffer[i+1]=0;
buffer[i+2]=0;
buffer[i+3]=0;
}
break;
case IMGFMT_YUY2:
for(i=0;i<len;i+=4){
buffer[i]=0;
buffer[i+1]=0xFF;
buffer[i+2]=0;
buffer[i+3]=0;
}
break;
case IMGFMT_MJPEG:
/*
This is compressed format. I don't know yet how to fill such frame with blue color.
Keeping frame unchanged.
*/
break;
default:
memset(buffer,0xC0,len);
}
}
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