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use std::ffi::{CStr, CString, NulError};
use std::sync::atomic::{AtomicPtr, Ordering};
use std::{mem, panic, process, ptr};
use std::os::raw::{c_char, c_int, c_void};
use vapoursynth_sys as ffi;
#[derive(Debug, Clone, Copy)]
pub struct API {
handle: *const ffi::VSAPI,
}
unsafe impl Send for API {}
unsafe impl Sync for API {}
static RAW_API: AtomicPtr<ffi::VSAPI> = AtomicPtr::new(ptr::null_mut());
#[derive(Debug, Clone, Copy, Eq, PartialEq, Ord, PartialOrd, Hash)]
pub enum MessageType {
Debug,
Warning,
Critical,
Fatal,
}
macro_rules! prop_get_something {
($name:ident, $func:ident, $rv:ty) => (
#[inline]
pub(crate) unsafe fn $name(
self,
map: &ffi::VSMap,
key: *const c_char,
index: i32,
error: &mut i32,
) -> $rv {
((*self.handle).$func)(map, key, index, error)
}
)
}
macro_rules! prop_set_something {
($name:ident, $func:ident, $type:ty) => (
#[inline]
pub(crate) unsafe fn $name(
self,
map: &mut ffi::VSMap,
key: *const c_char,
value: $type,
append: ffi::VSPropAppendMode,
) -> i32 {
((*self.handle).$func)(map, key, value, append as i32)
}
)
}
impl API {
#[cfg(all(feature = "vsscript-functions", feature = "gte-vsscript-api-32"))]
#[inline]
pub fn get() -> Option<Self> {
use vsscript;
let handle = RAW_API.load(Ordering::Relaxed);
let handle = if handle.is_null() {
vsscript::maybe_initialize();
let handle = unsafe { ffi::vsscript_getVSApi2(ffi::VAPOURSYNTH_API_VERSION) };
if !handle.is_null() {
RAW_API.store(handle as *mut _, Ordering::Relaxed);
}
handle
} else {
handle
};
if handle.is_null() {
None
} else {
Some(Self { handle })
}
}
#[cfg(all(feature = "vapoursynth-functions",
not(all(feature = "vsscript-functions", feature = "gte-vsscript-api-32"))))]
#[inline]
pub fn get() -> Option<Self> {
let handle = RAW_API.load(Ordering::Relaxed);
let handle = if handle.is_null() {
let handle = unsafe { ffi::getVapourSynthAPI(ffi::VAPOURSYNTH_API_VERSION) };
if !handle.is_null() {
RAW_API.store(handle as *mut _, Ordering::Relaxed);
}
handle
} else {
handle
};
if handle.is_null() {
None
} else {
Some(Self { handle })
}
}
pub(crate) unsafe fn get_cached() -> Self {
Self {
handle: RAW_API.load(Ordering::Relaxed),
}
}
#[cfg(feature = "gte-vapoursynth-api-34")]
pub fn log(self, message_type: MessageType, message: &str) -> Result<(), NulError> {
let message = CString::new(message)?;
unsafe {
((*self.handle).logMessage)(message_type.ffi_type(), message.as_ptr());
}
Ok(())
}
pub fn set_message_handler<F>(self, callback: F)
where
F: FnMut(MessageType, &CStr) + Send + 'static,
{
struct CallbackData {
callback: Box<FnMut(MessageType, &CStr) + Send + 'static>,
}
unsafe extern "system" fn c_callback(
msg_type: c_int,
msg: *const c_char,
user_data: *mut c_void,
) {
let mut user_data = Box::from_raw(user_data as *mut CallbackData);
{
let closure = panic::AssertUnwindSafe(|| {
let message_type = MessageType::from_ffi_type(msg_type).unwrap();
let message = CStr::from_ptr(msg);
(user_data.callback)(message_type, message);
});
if panic::catch_unwind(closure).is_err() {
eprintln!("panic in the set_message_handler() callback, aborting");
process::abort();
}
}
mem::forget(user_data);
}
let user_data = Box::new(CallbackData {
callback: Box::new(callback),
});
unsafe {
((*self.handle).setMessageHandler)(
Some(c_callback),
Box::into_raw(user_data) as *mut c_void,
);
}
}
pub fn set_message_handler_trivial(self, callback: fn(MessageType, &CStr)) {
unsafe extern "system" fn c_callback(
msg_type: c_int,
msg: *const c_char,
user_data: *mut c_void,
) {
let closure = panic::AssertUnwindSafe(|| {
let message_type = MessageType::from_ffi_type(msg_type).unwrap();
let message = CStr::from_ptr(msg);
let callback = *(&user_data as *const _ as *const fn(MessageType, &CStr));
(callback)(message_type, message);
});
if panic::catch_unwind(closure).is_err() {
eprintln!("panic in the set_message_handler_trivial() callback, aborting");
process::abort();
}
}
unsafe {
((*self.handle).setMessageHandler)(Some(c_callback), callback as *mut c_void);
}
}
#[inline]
pub fn clear_message_handler(self) {
unsafe {
((*self.handle).setMessageHandler)(None, ptr::null_mut());
}
}
#[inline]
pub(crate) unsafe fn free_node(self, node: *mut ffi::VSNodeRef) {
((*self.handle).freeNode)(node);
}
#[inline]
pub(crate) unsafe fn clone_node(self, node: *mut ffi::VSNodeRef) -> *mut ffi::VSNodeRef {
((*self.handle).cloneNodeRef)(node)
}
#[inline]
pub(crate) unsafe fn get_video_info(
self,
node: *mut ffi::VSNodeRef,
) -> *const ffi::VSVideoInfo {
((*self.handle).getVideoInfo)(node)
}
#[inline]
pub(crate) unsafe fn get_frame(
self,
n: i32,
node: *mut ffi::VSNodeRef,
err_msg: &mut [c_char],
) -> *const ffi::VSFrameRef {
let len = err_msg.len();
assert!(len <= i32::max_value() as usize);
let len = len as i32;
((*self.handle).getFrame)(n, node, err_msg.as_mut_ptr(), len)
}
#[inline]
pub(crate) unsafe fn get_frame_async(
self,
n: i32,
node: *mut ffi::VSNodeRef,
callback: ffi::VSFrameDoneCallback,
user_data: *mut c_void,
) {
((*self.handle).getFrameAsync)(n, node, callback, user_data);
}
#[inline]
pub(crate) unsafe fn free_frame(self, frame: *const ffi::VSFrameRef) {
((*self.handle).freeFrame)(frame);
}
#[inline]
pub(crate) unsafe fn clone_frame(
self,
frame: *const ffi::VSFrameRef,
) -> *const ffi::VSFrameRef {
((*self.handle).cloneFrameRef)(frame)
}
#[inline]
pub(crate) unsafe fn get_frame_format(
self,
frame: *const ffi::VSFrameRef,
) -> *const ffi::VSFormat {
((*self.handle).getFrameFormat)(frame)
}
#[inline]
pub(crate) unsafe fn get_frame_width(self, frame: *const ffi::VSFrameRef, plane: i32) -> i32 {
((*self.handle).getFrameWidth)(frame, plane)
}
#[inline]
pub(crate) unsafe fn get_frame_height(self, frame: *const ffi::VSFrameRef, plane: i32) -> i32 {
((*self.handle).getFrameHeight)(frame, plane)
}
#[inline]
pub(crate) unsafe fn get_frame_stride(self, frame: *const ffi::VSFrameRef, plane: i32) -> i32 {
((*self.handle).getStride)(frame, plane)
}
#[inline]
pub(crate) unsafe fn get_frame_read_ptr(
self,
frame: *const ffi::VSFrameRef,
plane: i32,
) -> *const u8 {
((*self.handle).getReadPtr)(frame, plane)
}
#[inline]
pub(crate) unsafe fn get_frame_props_ro(
self,
frame: *const ffi::VSFrameRef,
) -> *const ffi::VSMap {
((*self.handle).getFramePropsRO)(frame)
}
#[inline]
pub(crate) fn create_map(self) -> *mut ffi::VSMap {
unsafe { ((*self.handle).createMap)() }
}
#[inline]
pub(crate) unsafe fn clear_map(self, map: &mut ffi::VSMap) {
((*self.handle).clearMap)(map);
}
#[inline]
pub(crate) unsafe fn free_map(self, map: &mut ffi::VSMap) {
((*self.handle).freeMap)(map);
}
#[inline]
pub(crate) unsafe fn get_error(self, map: &ffi::VSMap) -> *const c_char {
((*self.handle).getError)(map)
}
#[inline]
pub(crate) unsafe fn set_error(self, map: &mut ffi::VSMap, error_message: *const c_char) {
((*self.handle).setError)(map, error_message)
}
#[inline]
pub(crate) unsafe fn prop_num_keys(self, map: &ffi::VSMap) -> i32 {
((*self.handle).propNumKeys)(map)
}
#[inline]
pub(crate) unsafe fn prop_get_key(self, map: &ffi::VSMap, index: i32) -> *const c_char {
((*self.handle).propGetKey)(map, index)
}
#[inline]
pub(crate) unsafe fn prop_delete_key(self, map: &mut ffi::VSMap, key: *const c_char) -> i32 {
((*self.handle).propDeleteKey)(map, key)
}
#[inline]
pub(crate) unsafe fn prop_num_elements(self, map: &ffi::VSMap, key: *const c_char) -> i32 {
((*self.handle).propNumElements)(map, key)
}
#[inline]
pub(crate) unsafe fn prop_get_type(self, map: &ffi::VSMap, key: *const c_char) -> c_char {
((*self.handle).propGetType)(map, key)
}
#[inline]
pub(crate) unsafe fn prop_get_data_size(
self,
map: &ffi::VSMap,
key: *const c_char,
index: i32,
error: &mut i32,
) -> i32 {
((*self.handle).propGetDataSize)(map, key, index, error)
}
prop_get_something!(prop_get_int, propGetInt, i64);
prop_get_something!(prop_get_float, propGetFloat, f64);
prop_get_something!(prop_get_data, propGetData, *const c_char);
prop_get_something!(prop_get_node, propGetNode, *mut ffi::VSNodeRef);
prop_get_something!(prop_get_frame, propGetFrame, *const ffi::VSFrameRef);
prop_get_something!(prop_get_func, propGetFunc, *mut ffi::VSFuncRef);
prop_set_something!(prop_set_int, propSetInt, i64);
prop_set_something!(prop_set_float, propSetFloat, f64);
prop_set_something!(prop_set_node, propSetNode, *mut ffi::VSNodeRef);
prop_set_something!(prop_set_frame, propSetFrame, *const ffi::VSFrameRef);
prop_set_something!(prop_set_func, propSetFunc, *mut ffi::VSFuncRef);
#[cfg(feature = "gte-vapoursynth-api-31")]
#[inline]
pub(crate) unsafe fn prop_get_int_array(
self,
map: &ffi::VSMap,
key: *const c_char,
error: &mut i32,
) -> *const i64 {
((*self.handle).propGetIntArray)(map, key, error)
}
#[cfg(feature = "gte-vapoursynth-api-31")]
#[inline]
pub(crate) unsafe fn prop_get_float_array(
self,
map: &ffi::VSMap,
key: *const c_char,
error: &mut i32,
) -> *const f64 {
((*self.handle).propGetFloatArray)(map, key, error)
}
#[inline]
pub(crate) unsafe fn prop_set_data(
self,
map: &mut ffi::VSMap,
key: *const c_char,
value: &[u8],
append: ffi::VSPropAppendMode,
) -> i32 {
let length = value.len();
assert!(length <= i32::max_value() as usize);
let length = length as i32;
((*self.handle).propSetData)(map, key, value.as_ptr() as _, length, append as i32)
}
#[cfg(feature = "gte-vapoursynth-api-31")]
#[inline]
pub(crate) unsafe fn prop_set_int_array(
self,
map: &mut ffi::VSMap,
key: *const c_char,
value: &[i64],
) -> i32 {
let length = value.len();
assert!(length <= i32::max_value() as usize);
let length = length as i32;
((*self.handle).propSetIntArray)(map, key, value.as_ptr(), length)
}
#[cfg(feature = "gte-vapoursynth-api-31")]
#[inline]
pub(crate) unsafe fn prop_set_float_array(
self,
map: &mut ffi::VSMap,
key: *const c_char,
value: &[f64],
) -> i32 {
let length = value.len();
assert!(length <= i32::max_value() as usize);
let length = length as i32;
((*self.handle).propSetFloatArray)(map, key, value.as_ptr(), length)
}
#[inline]
pub(crate) unsafe fn free_func(self, function: *mut ffi::VSFuncRef) {
((*self.handle).freeFunc)(function);
}
#[inline]
pub(crate) unsafe fn clone_func(self, function: *mut ffi::VSFuncRef) -> *mut ffi::VSFuncRef {
((*self.handle).cloneFuncRef)(function)
}
#[inline]
pub(crate) unsafe fn get_core_info(self, core: *mut ffi::VSCore) -> *const ffi::VSCoreInfo {
((*self.handle).getCoreInfo)(core)
}
#[inline]
pub(crate) unsafe fn get_format_preset(
self,
id: i32,
core: *mut ffi::VSCore,
) -> *const ffi::VSFormat {
((*self.handle).getFormatPreset)(id, core)
}
#[inline]
pub(crate) unsafe fn register_format(
self,
color_family: ffi::VSColorFamily,
sample_type: ffi::VSSampleType,
bits_per_sample: i32,
sub_sampling_w: i32,
sub_sampling_h: i32,
core: *mut ffi::VSCore,
) -> *const ffi::VSFormat {
((*self.handle).registerFormat)(
color_family as i32,
sample_type as i32,
bits_per_sample,
sub_sampling_w,
sub_sampling_h,
core,
)
}
}
impl MessageType {
#[inline]
fn ffi_type(self) -> c_int {
let rv = match self {
MessageType::Debug => ffi::VSMessageType::mtDebug,
MessageType::Warning => ffi::VSMessageType::mtWarning,
MessageType::Critical => ffi::VSMessageType::mtCritical,
MessageType::Fatal => ffi::VSMessageType::mtFatal,
};
rv as c_int
}
#[inline]
fn from_ffi_type(x: c_int) -> Option<Self> {
match x {
x if x == ffi::VSMessageType::mtDebug as c_int => Some(MessageType::Debug),
x if x == ffi::VSMessageType::mtWarning as c_int => Some(MessageType::Warning),
x if x == ffi::VSMessageType::mtCritical as c_int => Some(MessageType::Critical),
x if x == ffi::VSMessageType::mtFatal as c_int => Some(MessageType::Fatal),
_ => None,
}
}
}