int readframe(void)
{
struct v4l2_buffer buf;
unsigned int i;
CLEAR (buf);
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
if (-1 == xioctl (fd, VIDIOC_DQBUF, &buf)) {
switch (errno) {
case EAGAIN:
return 0;
case EIO:
default:
return errnoexit ("VIDIOC_DQBUF");
}
}
assert (buf.index < n_buffers);
processimage (buffers[buf.index].start);
if (-1 == xioctl (fd, VIDIOC_QBUF, &buf))
return errnoexit ("VIDIOC_QBUF");
return 1;
}
int readframe(int i)
{
struct v4l2_buffer buf;
CLEAR (buf);
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
if (-1 == xioctl (fd[i], VIDIOC_DQBUF, &buf)) {
switch (errno) {
case EAGAIN:
return 0;
case EIO:
default:
return errnoexit ("VIDIOC_DQBUF");
}
}
assert (buf.index < n_buffers[i]);
processimage (i, buffers[i][buf.index].start, buffers[i][buf.index].length);
if (-1 == xioctl (fd[i], VIDIOC_QBUF, &buf)){
LOGE("in readframe");
return errnoexit ("VIDIOC_QBUF");
}
return 1;
}
int Java_com_example_android_wearable_mjpegviewwear_MjpegInputStream_pixeltobmp( JNIEnv* env,jobject thiz,
jbyteArray jp, jint l, jobject bmp) {
jboolean b;
jbyte *p=(*env)->GetByteArrayElements(env,jp,&b);
processimage ((const void *)p, l);
AndroidBitmapInfo info;
void* pixels;
int ret;
int i;
int *colors;
int width = IMG_WIDTH;
int height = IMG_HEIGHT;
if(bmp==NULL) return;
if ((ret = AndroidBitmap_getInfo(env, bmp, &info)) < 0) {
LOGE("AndroidBitmap_getInfo() failed ! error=%d", ret);
(*env)->ReleaseByteArrayElements(env, jp, p, 0);
return -1;
}
if (info.format != ANDROID_BITMAP_FORMAT_RGBA_8888) {
LOGE("Bitmap format is not RGBA_8888 !");
(*env)->ReleaseByteArrayElements(env, jp, p, 0);
return -1;
}
if (info.width != IMG_WIDTH || info.height != IMG_HEIGHT) {
LOGE("Bitmap size differs !");
(*env)->ReleaseByteArrayElements(env, jp, p, 0);
return -1;
}
if ((ret = AndroidBitmap_lockPixels(env, bmp, &pixels)) < 0) {
LOGE("AndroidBitmap_lockPixels() failed ! error=%d", ret);
}
colors = (int*)pixels;
int *lrgb = &rgb[0];
for(i=0 ; i<width*height ; i++) {
*colors++ = *lrgb++;
}
AndroidBitmap_unlockPixels(env, bmp);
(*env)->ReleaseByteArrayElements(env, jp, p, 0);
return 0;
}
