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use frame::*;
use std::rc::Rc;
use std::cell::RefCell;
use io::byteio::ByteIOError;
use io::bitreader::BitReaderError;
use io::codebook::CodebookError;
#[derive(Debug,Clone,Copy,PartialEq)]
#[allow(dead_code)]
pub enum DecoderError {
NoFrame,
AllocError,
TryAgain,
InvalidData,
ShortData,
MissingReference,
NotImplemented,
Bug,
}
pub type DecoderResult<T> = Result<T, DecoderError>;
impl From<ByteIOError> for DecoderError {
fn from(_: ByteIOError) -> Self { DecoderError::ShortData }
}
impl From<BitReaderError> for DecoderError {
fn from(e: BitReaderError) -> Self {
match e {
BitReaderError::BitstreamEnd => DecoderError::ShortData,
_ => DecoderError::InvalidData,
}
}
}
impl From<CodebookError> for DecoderError {
fn from(_: CodebookError) -> Self { DecoderError::InvalidData }
}
impl From<AllocatorError> for DecoderError {
fn from(_: AllocatorError) -> Self { DecoderError::AllocError }
}
macro_rules! validate {
($a:expr) => { if !$a { println!("check failed at {}:{}", file!(), line!()); return Err(DecoderError::InvalidData); } };
}
#[allow(dead_code)]
struct HAMShuffler {
lastframe: Option<NAVideoBuffer<u8>>,
}
impl HAMShuffler {
#[allow(dead_code)]
fn new() -> Self { HAMShuffler { lastframe: None } }
#[allow(dead_code)]
fn clear(&mut self) { self.lastframe = None; }
#[allow(dead_code)]
fn add_frame(&mut self, buf: NAVideoBuffer<u8>) {
self.lastframe = Some(buf);
}
#[allow(dead_code)]
fn clone_ref(&mut self) -> Option<NAVideoBuffer<u8>> {
if let Some(ref mut frm) = self.lastframe {
let newfrm = frm.copy_buffer();
*frm = newfrm.clone();
Some(newfrm)
} else {
None
}
}
#[allow(dead_code)]
fn get_output_frame(&mut self) -> Option<NAVideoBuffer<u8>> {
match self.lastframe {
Some(ref frm) => Some(frm.clone()),
None => None,
}
}
}
#[allow(dead_code)]
struct IPShuffler {
lastframe: Option<NAVideoBuffer<u8>>,
}
impl IPShuffler {
#[allow(dead_code)]
fn new() -> Self { IPShuffler { lastframe: None } }
#[allow(dead_code)]
fn clear(&mut self) { self.lastframe = None; }
#[allow(dead_code)]
fn add_frame(&mut self, buf: NAVideoBuffer<u8>) {
self.lastframe = Some(buf);
}
#[allow(dead_code)]
fn get_ref(&mut self) -> Option<NAVideoBuffer<u8>> {
if let Some(ref frm) = self.lastframe {
Some(frm.clone())
} else {
None
}
}
}
pub trait NADecoder {
fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()>;
fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef>;
}
#[derive(Clone,Copy)]
pub struct DecoderInfo {
name: &'static str,
get_decoder: fn () -> Box<NADecoder>,
}
#[cfg(feature="h263")]
mod blockdsp;
#[cfg(feature="decoder_gdvvid")]
mod gremlinvideo;
#[cfg(any(feature="decoder_indeo2", feature="decoder_indeo3", feature="decoder_indeo4", feature="decoder_indeo5", feature="decoder_imc"))]
mod indeo;
#[cfg(feature="h263")]
mod h263;
#[cfg(feature="decoder_pcm")]
mod pcm;
const DECODERS: &[DecoderInfo] = &[
#[cfg(feature="decoder_gdvvid")]
DecoderInfo { name: "gdv-video", get_decoder: gremlinvideo::get_decoder },
#[cfg(feature="decoder_indeo2")]
DecoderInfo { name: "indeo2", get_decoder: indeo::indeo2::get_decoder },
#[cfg(feature="decoder_indeo3")]
DecoderInfo { name: "indeo3", get_decoder: indeo::indeo3::get_decoder },
#[cfg(feature="decoder_indeo4")]
DecoderInfo { name: "indeo4", get_decoder: indeo::indeo4::get_decoder },
#[cfg(feature="decoder_indeo5")]
DecoderInfo { name: "indeo5", get_decoder: indeo::indeo5::get_decoder },
#[cfg(feature="decoder_intel263")]
DecoderInfo { name: "intel263", get_decoder: h263::intel263::get_decoder },
#[cfg(feature="decoder_realvideo1")]
DecoderInfo { name: "realvideo1", get_decoder: h263::rv10::get_decoder },
#[cfg(feature="decoder_realvideo2")]
DecoderInfo { name: "realvideo2", get_decoder: h263::rv20::get_decoder },
#[cfg(feature="decoder_pcm")]
DecoderInfo { name: "pcm", get_decoder: pcm::get_decoder },
#[cfg(feature="decoder_imc")]
DecoderInfo { name: "imc", get_decoder: indeo::imc::get_decoder_imc },
#[cfg(feature="decoder_imc")]
DecoderInfo { name: "iac", get_decoder: indeo::imc::get_decoder_iac },
];
pub fn find_decoder(name: &str) -> Option<fn () -> Box<NADecoder>> {
for &dec in DECODERS {
if dec.name == name {
return Some(dec.get_decoder);
}
}
None
}
|
