int bgsubtract_prepare(VJFrame *frame)
{
if(!static_bg__ )
{
return 0;
}
if( auto_hist )
vje_histogram_auto_eq( frame );
//@ copy the iamge
veejay_memcpy( bg_frame__[0], frame->data[0], frame->len );
if( frame->ssm ) {
veejay_memcpy( bg_frame__[1], frame->data[1], frame->len );
veejay_memcpy( bg_frame__[2], frame->data[2], frame->len );
bg_ssm = 1;
}
else {
// if data is not subsampled, upsample chroma planes now
veejay_memcpy( bg_frame__[1], frame->data[1], frame->uv_len );
veejay_memcpy( bg_frame__[2], frame->data[2], frame->uv_len );
chroma_supersample( SSM_422_444, frame, bg_frame__ );
bg_ssm = 1;
}
bg_n = 0;
veejay_msg(2, "Subtract background: Snapped background frame (4:4:4 = %d)", bg_ssm);
return 1;
}
int y4m_js_decode_frame(y4m_cb_reader_t *r, y4m_stream_info_t *si, y4m_frame_info_t *fi, uint8_t *rgba)
{
int i, j;
uint8_t *ycbcr[3];
int32_t plane_length[3];
int32_t width;
int32_t height;
int32_t ret_value;
if(NULL == r || NULL == si || NULL == fi || NULL == rgba) {
return Y4M_UNKNOWN;
}
if(3 != y4m_si_get_plane_count(si)) {
return Y4M_UNKNOWN;
}
width = y4m_si_get_plane_width(si, 0);
height = y4m_si_get_plane_height(si, 0);
for(i = 0; i < 3; ++i) {
plane_length[i] = y4m_si_get_plane_length(si, i);
if(NULL == (ycbcr[i] = malloc(width * height))) {
return Y4M_UNKNOWN;
}
}
ret_value = y4m_read_frame_cb(r, si, fi, ycbcr);
if(Y4M_OK != ret_value) {
return ret_value;
}
chroma_supersample(Y4M_CHROMA_420JPEG, ycbcr, width, height);
convert_YCbCr_to_RGB(ycbcr, width * height);
for(i = 0; i < width * height; ++i) {
for(j = 0; j < 3; ++j) {
rgba[i * 4 + j] = ycbcr[j][i];
}
}
return Y4M_OK;
}
int vj_perform_take_bg(veejay_t *info, VJFrame *frame, int pass)
{
int n = 0;
if( pass == 0 ) {
if(frame->ssm == 1 ) {
n += vj_effect_prepare( frame, VJ_VIDEO_EFFECT_CHAMBLEND );
n += vj_effect_prepare( frame, VJ_IMAGE_EFFECT_CHAMELEON );
if(n > 0 )
return 1;
}
if(frame->ssm == 0) {
n += vj_effect_prepare( frame, VJ_IMAGE_EFFECT_BGSUBTRACT );
n += vj_effect_prepare( frame, VJ_VIDEO_EFFECT_DIFF );
n += vj_effect_prepare( frame, VJ_IMAGE_EFFECT_MOTIONMAP );
n += vj_effect_prepare( frame, VJ_IMAGE_EFFECT_CONTOUR );
if( n > 0 )
return 1;
}
if( frame->ssm == 0 )
{
chroma_supersample( info->settings->sample_mode,frame,frame->data );
n += vj_effect_prepare( frame, VJ_VIDEO_EFFECT_CHAMBLEND );
n += vj_effect_prepare( frame, VJ_IMAGE_EFFECT_CHAMELEON );
frame->ssm = 1;
return 0;
}
return (n > 0 ? 0: 1 );
} else {
if(frame->ssm == 0) {
n += vj_effect_prepare( frame, VJ_IMAGE_EFFECT_BGSUBTRACT );
n += vj_effect_prepare( frame, VJ_VIDEO_EFFECT_DIFF );
n += vj_effect_prepare( frame, VJ_IMAGE_EFFECT_MOTIONMAP );
n += vj_effect_prepare( frame, VJ_IMAGE_EFFECT_CONTOUR );
return 0;
}
}
return 0;
}
