void v4lconvert_destroy(struct v4lconvert_data *data)
{
v4lprocessing_destroy(data->processing);
v4lcontrol_destroy(data->control);
if (data->jdec) {
unsigned char *comps[3] = { NULL, NULL, NULL };
tinyjpeg_set_components(data->jdec, comps, 3);
tinyjpeg_free(data->jdec);
}
v4lconvert_helper_cleanup(data);
free(data->convert1_buf);
free(data->convert2_buf);
free(data->rotate90_buf);
free(data->flip_buf);
free(data->convert_pixfmt_buf);
free(data);
}
void v4lconvert_destroy(struct v4lconvert_data *data)
{
v4lprocessing_destroy(data->processing);
v4lcontrol_destroy(data->control);
if (data->tinyjpeg) {
unsigned char *comps[3] = { NULL, NULL, NULL };
tinyjpeg_set_components(data->tinyjpeg, comps, 3);
tinyjpeg_free(data->tinyjpeg);
}
if (data->cinfo_initialized)
jpeg_destroy_decompress(&data->cinfo);
v4lconvert_helper_cleanup(data);
free(data->convert1_buf);
free(data->convert2_buf);
free(data->rotate90_buf);
free(data->flip_buf);
free(data->convert_pixfmt_buf);
free(data->previous_frame);
free(data);
}
struct v4lconvert_data *v4lconvert_create(int fd)
{
int i, j;
struct v4lconvert_data *data = calloc(1, sizeof(struct v4lconvert_data));
struct v4l2_capability cap;
/* This keeps tracks of devices which have only formats for which apps
most likely will need conversion and we can thus safely add software
processing controls without a performance impact. */
int always_needs_conversion = 1;
if (!data) {
fprintf(stderr, "libv4lconvert: error: out of memory!\n");
return NULL;
}
data->fd = fd;
data->decompress_pid = -1;
data->fps = 30;
/* Check supported formats */
for (i = 0; ; i++) {
struct v4l2_fmtdesc fmt = { .type = V4L2_BUF_TYPE_VIDEO_CAPTURE };
fmt.index = i;
if (SYS_IOCTL(data->fd, VIDIOC_ENUM_FMT, &fmt))
break;
for (j = 0; j < ARRAY_SIZE(supported_src_pixfmts); j++)
if (fmt.pixelformat == supported_src_pixfmts[j].fmt)
break;
if (j < ARRAY_SIZE(supported_src_pixfmts)) {
data->supported_src_formats |= 1 << j;
v4lconvert_get_framesizes(data, fmt.pixelformat, j);
if (!supported_src_pixfmts[j].needs_conversion)
always_needs_conversion = 0;
} else
always_needs_conversion = 0;
}
data->no_formats = i;
/* Check if this cam has any special flags */
if (SYS_IOCTL(data->fd, VIDIOC_QUERYCAP, &cap) == 0) {
if (!strcmp((char *)cap.driver, "uvcvideo"))
data->flags |= V4LCONVERT_IS_UVC;
if ((cap.capabilities & 0xff) & ~V4L2_CAP_VIDEO_CAPTURE)
always_needs_conversion = 0;
}
data->control = v4lcontrol_create(fd, always_needs_conversion);
if (!data->control) {
free(data);
return NULL;
}
data->bandwidth = v4lcontrol_get_bandwidth(data->control);
data->control_flags = v4lcontrol_get_flags(data->control);
if (data->control_flags & V4LCONTROL_FORCE_TINYJPEG)
data->flags |= V4LCONVERT_USE_TINYJPEG;
data->processing = v4lprocessing_create(fd, data->control);
if (!data->processing) {
v4lcontrol_destroy(data->control);
free(data);
return NULL;
}
return data;
}
