static void *y4frame_thread(void *arg) {
y4data *thread_data=(y4data *)arg;
lives_yuv4m_t *yuv4mpeg=thread_data->yuv4mpeg;
char buff[5],bchar;
thread_data->i=Y4M_OK;
// read 5 bytes FRAME
fill_read(yuv4mpeg->fd,buff,5);
if (strncmp(buff,"FRAME",5)) {
thread_data->i=Y4M_ERR_MAGIC;
pthread_exit(NULL);
}
do {
fill_read(yuv4mpeg->fd,&bchar,1);
} while (strncmp(&bchar,"\n",1));
// read YUV420
fill_read(yuv4mpeg->fd,(char *)yuv4mpeg->pixel_data[0],yuv4mpeg->hsize*yuv4mpeg->vsize);
fill_read(yuv4mpeg->fd,(char *)yuv4mpeg->pixel_data[1],yuv4mpeg->hsize*yuv4mpeg->vsize/4);
fill_read(yuv4mpeg->fd,(char *)yuv4mpeg->pixel_data[2],yuv4mpeg->hsize*yuv4mpeg->vsize/4);
pthread_exit(NULL);
}
static ssize_t
read(struct file * file, char __user * userbuf, size_t count, loff_t * off)
{
char *buffer = file->private_data;
struct dentry *dentry = file->f_dentry;
int size = dentry->d_inode->i_size;
loff_t offs = *off;
int ret;
if (count > PAGE_SIZE)
count = PAGE_SIZE;
if (size) {
if (offs > size)
return 0;
if (offs + count > size)
count = size - offs;
}
ret = fill_read(dentry, buffer, offs, count);
if (ret < 0)
return ret;
count = ret;
if (copy_to_user(userbuf, buffer, count))
return -EFAULT;
pr_debug("offs = %lld, *off = %lld, count = %zd\n", offs, *off, count);
*off = offs + count;
return count;
}
static ssize_t
read(struct file *file, char __user *userbuf, size_t bytes, loff_t *off)
{
struct bin_buffer *bb = file->private_data;
struct dentry *dentry = file->f_path.dentry;
int size = dentry->d_inode->i_size;
loff_t offs = *off;
int count = min_t(size_t, bytes, PAGE_SIZE);
if (size) {
if (offs > size)
return 0;
if (offs + count > size)
count = size - offs;
}
mutex_lock(&bb->mutex);
count = fill_read(dentry, bb->buffer, offs, count);
if (count < 0)
goto out_unlock;
if (copy_to_user(userbuf, bb->buffer, count)) {
count = -EFAULT;
goto out_unlock;
}
pr_debug("offs = %lld, *off = %lld, count = %d\n", offs, *off, count);
*off = offs + count;
out_unlock:
mutex_unlock(&bb->mutex);
return count;
}
static ssize_t
read(struct file *file, char __user *userbuf, size_t bytes, loff_t *off)
{
struct bin_buffer *bb = file->private_data;
struct dentry *dentry = file->f_path.dentry;
int size = dentry->d_inode->i_size;
loff_t offs = *off;
int count = min_t(size_t, bytes, PAGE_SIZE);
char *temp;
if (!bytes)
return 0;
if (size) {
if (offs > size)
return 0;
if (offs + count > size)
count = size - offs;
}
temp = kmalloc(count, GFP_KERNEL);
if (!temp)
return -ENOMEM;
mutex_lock(&bb->mutex);
count = fill_read(dentry, bb->buffer, offs, count);
if (count < 0) {
mutex_unlock(&bb->mutex);
goto out_free;
}
memcpy(temp, bb->buffer, count);
mutex_unlock(&bb->mutex);
if (copy_to_user(userbuf, temp, count)) {
count = -EFAULT;
goto out_free;
}
pr_debug("offs = %lld, *off = %lld, count = %d\n", offs, *off, count);
*off = offs + count;
out_free:
kfree(temp);
return count;
}