static void uninit(void) {
int j;
mp_msg(MSGT_VO, MSGL_V, "zr: uninit called\n");
for (j = 0; j < zr_count; j++) {
jpeg_enc_uninit(zr_info[j].j);
uninit_zoran(&zr_info[j]);
}
}
/**
* \param vf pointer to the vf instance structure
*/
static void uninit(vf_instance_t *vf) {
struct vf_priv_s *priv = vf->priv;
VERBOSE("uninit() called\n");
if (priv->j) jpeg_enc_uninit(priv->j);
free(priv);
}
/**
* \param vf video filter instance pointer
* \param width image source width in pixels
* \param height image source height in pixels
* \param d_width width of requested window, just a hint
* \param d_height height of requested window, just a hint
* \param flags vf filter flags
* \param outfmt
*
* \returns returns 0 on error
*
* This routine will make the necessary hardware-related decisions for
* the ZRMJPEG filter, do the initialization of the MJPEG encoder, and
* then select one of the ZRJMJPEGIT or ZRMJPEGNI filters and then
* arrange to dispatch to the config() entry pointer for the one
* selected.
*/
static int config(struct vf_instance *vf, int width, int height, int d_width,
int d_height, unsigned int flags, unsigned int outfmt){
struct vf_priv_s *priv = vf->priv;
float aspect_decision;
int stretchx, stretchy, err = 0, maxstretchx = 4;
priv->fields = 1;
VERBOSE("config() called\n");
if (priv->j) {
VERBOSE("re-configuring, resetting JPEG encoder\n");
jpeg_enc_uninit(priv->j);
priv->j = NULL;
}
aspect_decision = ((float)d_width/(float)d_height)/
((float)width/(float)height);
if (aspect_decision > 1.8 && aspect_decision < 2.2) {
VERBOSE("should correct aspect by stretching x times 2, %d %d\n", 2*width, priv->maxwidth);
if (2*width <= priv->maxwidth) {
d_width = 2*width;
d_height = height;
maxstretchx = 2;
} else {
WARNING("unable to correct aspect by stretching, because resulting X will be too large, aspect correction by decimating y not yet implemented\n");
d_width = width;
d_height = height;
}
/* prestretch movie */
} else {
/* uncorrecting output for now */
d_width = width;
d_height = height;
}
/* make the scaling decision
* we are capable of stretching the image in the horizontal
* direction by factors 1, 2 and 4
* we can stretch the image in the vertical direction by a
* factor of 1 and 2 AND we must decide about interlacing */
if (d_width > priv->maxwidth/2 || height > priv->maxheight/2
|| maxstretchx == 1) {
stretchx = 1;
stretchy = 1;
priv->fields = 2;
if (priv->vdec == 2) {
priv->fields = 1;
} else if (priv->vdec == 4) {
priv->fields = 1;
stretchy = 2;
}
if (priv->hdec > maxstretchx) {
if (priv->fd) {
WARNING("horizontal decimation too high, "
"changing to %d (use fd to keep"
" hdec=%d)\n",
maxstretchx, priv->hdec);
priv->hdec = maxstretchx;
}
}
stretchx = priv->hdec;
} else if (d_width > priv->maxwidth/4 ||
height > priv->maxheight/4 ||
maxstretchx == 2) {
stretchx = 2;
stretchy = 1;
priv->fields = 1;
if (priv->vdec == 2) {
stretchy = 2;
} else if (priv->vdec == 4) {
if (!priv->fd) {
WARNING("vertical decimation too high, "
"changing to 2 (use fd to keep "
"vdec=4)\n");
priv->vdec = 2;
}
stretchy = 2;
}
if (priv->hdec == 2) {
stretchx = 4;
} else if (priv->hdec == 4) {
if (priv->fd) {
WARNING("horizontal decimation too high, "
"changing to 2 (use fd to keep "
"hdec=4)\n");
priv->hdec = 2;
}
stretchx = 4;
}
} else {
/* output image is maximally stretched */
stretchx = 4;
stretchy = 2;
priv->fields = 1;
if (priv->vdec != 1 && !priv->fd) {
WARNING("vertical decimation too high, changing to 1 "
"(use fd to keep vdec=%d)\n",
priv->vdec);
priv->vdec = 1;
}
if (priv->hdec != 1 && !priv->fd) {
WARNING("horizontal decimation too high, changing to 1 (use fd to keep hdec=%d)\n", priv->hdec);
priv->hdec = 1;
}
}
VERBOSE("generated JPEG's %dx%s%d%s, stretched to %dx%d\n",
width/priv->hdec, (priv->fields == 2) ? "(" : "",
height/(priv->vdec*priv->fields),
(priv->fields == 2) ? "x2)" : "",
(width/priv->hdec)*stretchx,
(height/(priv->vdec*priv->fields))*
stretchy*priv->fields);
if ((width/priv->hdec)*stretchx > priv->maxwidth ||
(height/(priv->vdec*priv->fields))*
stretchy*priv->fields > priv->maxheight) {
ERROR("output dimensions too large (%dx%d), max (%dx%d) "
"insert crop to fix\n",
(width/priv->hdec)*stretchx,
(height/(priv->vdec*priv->fields))*
stretchy*priv->fields,
priv->maxwidth, priv->maxheight);
err = 1;
}
if (width%(16*priv->hdec) != 0) {
ERROR("width must be a multiple of 16*hdec (%d), use expand\n",
priv->hdec*16);
err = 1;
}
if (height%(8*priv->fields*priv->vdec) != 0) {
ERROR("height must be a multiple of 8*fields*vdec (%d),"
" use expand\n", priv->vdec*priv->fields*8);
err = 1;
}
if (err) return 0;
priv->y_stride = width;
priv->c_stride = width/2;
priv->j = jpeg_enc_init(width, height/priv->fields,
priv->fields*priv->y_stride,
priv->fields*priv->c_stride,
priv->fields*priv->c_stride,
1, priv->quality, priv->bw);
if (!priv->j) return 0;
return vf_next_config(vf, width, height, d_width, d_height, flags,
(priv->fields == 2) ? IMGFMT_ZRMJPEGIT : IMGFMT_ZRMJPEGNI);
}