2 use std::ops::{Add, AddAssign, Sub, SubAssign};
6 use std::cell::RefCell;
8 use crate::io::byteio::ByteIOError;
9 use crate::io::bitreader::BitReaderError;
10 use crate::io::codebook::CodebookError;
12 #[derive(Debug,Clone,Copy,PartialEq)]
14 pub enum DecoderError {
25 pub type DecoderResult<T> = Result<T, DecoderError>;
27 impl From<ByteIOError> for DecoderError {
28 fn from(_: ByteIOError) -> Self { DecoderError::ShortData }
31 impl From<BitReaderError> for DecoderError {
32 fn from(e: BitReaderError) -> Self {
34 BitReaderError::BitstreamEnd => DecoderError::ShortData,
35 _ => DecoderError::InvalidData,
40 impl From<CodebookError> for DecoderError {
41 fn from(_: CodebookError) -> Self { DecoderError::InvalidData }
44 impl From<AllocatorError> for DecoderError {
45 fn from(_: AllocatorError) -> Self { DecoderError::AllocError }
48 macro_rules! validate {
49 ($a:expr) => { if !$a { println!("check failed at {}:{}", file!(), line!()); return Err(DecoderError::InvalidData); } };
53 pub struct HAMShuffler {
54 lastframe: Option<NAVideoBuffer<u8>>,
59 pub fn new() -> Self { HAMShuffler { lastframe: None } }
61 pub fn clear(&mut self) { self.lastframe = None; }
63 pub fn add_frame(&mut self, buf: NAVideoBuffer<u8>) {
64 self.lastframe = Some(buf);
67 pub fn clone_ref(&mut self) -> Option<NAVideoBuffer<u8>> {
68 if let Some(ref mut frm) = self.lastframe {
69 let newfrm = frm.copy_buffer();
70 *frm = newfrm.clone();
77 pub fn get_output_frame(&mut self) -> Option<NAVideoBuffer<u8>> {
78 match self.lastframe {
79 Some(ref frm) => Some(frm.clone()),
86 pub struct IPShuffler {
87 lastframe: Option<NAVideoBuffer<u8>>,
92 pub fn new() -> Self { IPShuffler { lastframe: None } }
94 pub fn clear(&mut self) { self.lastframe = None; }
96 pub fn add_frame(&mut self, buf: NAVideoBuffer<u8>) {
97 self.lastframe = Some(buf);
100 pub fn get_ref(&mut self) -> Option<NAVideoBuffer<u8>> {
101 if let Some(ref frm) = self.lastframe {
110 pub struct IPBShuffler {
111 lastframe: Option<NAVideoBuffer<u8>>,
112 nextframe: Option<NAVideoBuffer<u8>>,
117 pub fn new() -> Self { IPBShuffler { lastframe: None, nextframe: None } }
119 pub fn clear(&mut self) { self.lastframe = None; self.nextframe = None; }
121 pub fn add_frame(&mut self, buf: NAVideoBuffer<u8>) {
122 mem::swap(&mut self.lastframe, &mut self.nextframe);
123 self.lastframe = Some(buf);
126 pub fn get_lastref(&mut self) -> Option<NAVideoBuffer<u8>> {
127 if let Some(ref frm) = self.lastframe {
134 pub fn get_nextref(&mut self) -> Option<NAVideoBuffer<u8>> {
135 if let Some(ref frm) = self.nextframe {
142 pub fn get_b_fwdref(&mut self) -> Option<NAVideoBuffer<u8>> {
143 if let Some(ref frm) = self.nextframe {
150 pub fn get_b_bwdref(&mut self) -> Option<NAVideoBuffer<u8>> {
151 if let Some(ref frm) = self.lastframe {
159 #[derive(Debug,Clone,Copy,PartialEq)]
166 pub fn new(x: i16, y: i16) -> Self { MV{ x: x, y: y } }
167 pub fn pred(a: MV, b: MV, c: MV) -> Self {
173 if a.x < c.x { x = c.x; } else { x = a.x; }
177 if a.x < c.x { x = a.x; } else { x = c.x; }
187 if a.y < c.y { y = c.y; } else { y = a.y; }
191 if a.y < c.y { y = a.y; } else { y = c.y; }
200 pub const ZERO_MV: MV = MV { x: 0, y: 0 };
204 fn add(self, other: MV) -> MV { MV { x: self.x + other.x, y: self.y + other.y } }
207 impl AddAssign for MV {
208 fn add_assign(&mut self, other: MV) { self.x += other.x; self.y += other.y; }
213 fn sub(self, other: MV) -> MV { MV { x: self.x - other.x, y: self.y - other.y } }
216 impl SubAssign for MV {
217 fn sub_assign(&mut self, other: MV) { self.x -= other.x; self.y -= other.y; }
220 impl fmt::Display for MV {
221 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
222 write!(f, "{},{}", self.x, self.y)
227 pub trait NADecoder {
228 fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()>;
229 fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef>;
232 #[derive(Clone,Copy)]
233 pub struct DecoderInfo {
234 pub name: &'static str,
235 pub get_decoder: fn () -> Box<NADecoder>,
238 #[cfg(any(feature="h263"))]
241 #[cfg(feature="h263")]
244 pub struct RegisteredDecoders {
245 decs: Vec<DecoderInfo>,
248 impl RegisteredDecoders {
249 pub fn new() -> Self {
250 Self { decs: Vec::new() }
252 pub fn add_decoder(&mut self, dec: DecoderInfo) {
255 pub fn find_decoder(&self, name: &str) -> Option<fn () -> Box<NADecoder>> {
256 for &dec in self.decs.iter() {
257 if dec.name == name {
258 return Some(dec.get_decoder);