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Commit | Line | Data |
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1 | use frame::*; | |
2 | use std::rc::Rc; | |
3 | use std::cell::RefCell; | |
4 | use io::byteio::ByteIOError; | |
5 | use io::bitreader::BitReaderError; | |
6 | use io::codebook::CodebookError; | |
7 | ||
8 | #[derive(Debug,Clone,Copy,PartialEq)] | |
9 | #[allow(dead_code)] | |
10 | pub enum DecoderError { | |
11 | NoFrame, | |
12 | AllocError, | |
13 | TryAgain, | |
14 | InvalidData, | |
15 | ShortData, | |
16 | MissingReference, | |
17 | NotImplemented, | |
18 | Bug, | |
19 | } | |
20 | ||
21 | pub type DecoderResult<T> = Result<T, DecoderError>; | |
22 | ||
23 | impl From<ByteIOError> for DecoderError { | |
24 | fn from(_: ByteIOError) -> Self { DecoderError::ShortData } | |
25 | } | |
26 | ||
27 | impl From<BitReaderError> for DecoderError { | |
28 | fn from(e: BitReaderError) -> Self { | |
29 | match e { | |
30 | BitReaderError::BitstreamEnd => DecoderError::ShortData, | |
31 | _ => DecoderError::InvalidData, | |
32 | } | |
33 | } | |
34 | } | |
35 | ||
36 | impl From<CodebookError> for DecoderError { | |
37 | fn from(_: CodebookError) -> Self { DecoderError::InvalidData } | |
38 | } | |
39 | ||
40 | impl From<AllocatorError> for DecoderError { | |
41 | fn from(_: AllocatorError) -> Self { DecoderError::AllocError } | |
42 | } | |
43 | ||
44 | macro_rules! validate { | |
45 | ($a:expr) => { if !$a { return Err(DecoderError::InvalidData); } }; | |
46 | } | |
47 | ||
48 | #[allow(dead_code)] | |
49 | struct HAMShuffler { | |
50 | lastframe: Option<NAVideoBuffer<u8>>, | |
51 | } | |
52 | ||
53 | impl HAMShuffler { | |
54 | #[allow(dead_code)] | |
55 | fn new() -> Self { HAMShuffler { lastframe: None } } | |
56 | #[allow(dead_code)] | |
57 | fn clear(&mut self) { self.lastframe = None; } | |
58 | #[allow(dead_code)] | |
59 | fn add_frame(&mut self, buf: NAVideoBuffer<u8>) { | |
60 | self.lastframe = Some(buf); | |
61 | } | |
62 | #[allow(dead_code)] | |
63 | fn clone_ref(&mut self) -> Option<NAVideoBuffer<u8>> { | |
64 | if let Some(ref mut frm) = self.lastframe { | |
65 | let newfrm = frm.copy_buffer(); | |
66 | *frm = newfrm.clone(); | |
67 | Some(newfrm) | |
68 | } else { | |
69 | None | |
70 | } | |
71 | } | |
72 | #[allow(dead_code)] | |
73 | fn get_output_frame(&mut self) -> Option<NAVideoBuffer<u8>> { | |
74 | match self.lastframe { | |
75 | Some(ref frm) => Some(frm.clone()), | |
76 | None => None, | |
77 | } | |
78 | } | |
79 | } | |
80 | ||
81 | #[allow(dead_code)] | |
82 | struct IPShuffler { | |
83 | lastframe: Option<NAVideoBuffer<u8>>, | |
84 | } | |
85 | ||
86 | impl IPShuffler { | |
87 | #[allow(dead_code)] | |
88 | fn new() -> Self { IPShuffler { lastframe: None } } | |
89 | #[allow(dead_code)] | |
90 | fn clear(&mut self) { self.lastframe = None; } | |
91 | #[allow(dead_code)] | |
92 | fn add_frame(&mut self, buf: NAVideoBuffer<u8>) { | |
93 | self.lastframe = Some(buf); | |
94 | } | |
95 | #[allow(dead_code)] | |
96 | fn get_ref(&mut self) -> Option<NAVideoBuffer<u8>> { | |
97 | if let Some(ref frm) = self.lastframe { | |
98 | Some(frm.clone()) | |
99 | } else { | |
100 | None | |
101 | } | |
102 | } | |
103 | } | |
104 | ||
105 | pub trait NADecoder { | |
106 | fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()>; | |
107 | fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef>; | |
108 | } | |
109 | ||
110 | #[derive(Clone,Copy)] | |
111 | pub struct DecoderInfo { | |
112 | name: &'static str, | |
113 | get_decoder: fn () -> Box<NADecoder>, | |
114 | } | |
115 | ||
116 | #[cfg(feature="h263")] | |
117 | mod blockdsp; | |
118 | ||
119 | #[cfg(feature="decoder_gdvvid")] | |
120 | mod gremlinvideo; | |
121 | #[cfg(any(feature="decoder_indeo2", feature="decoder_indeo3", feature="decoder_imc"))] | |
122 | mod indeo; | |
123 | #[cfg(feature="h263")] | |
124 | mod h263; | |
125 | ||
126 | #[cfg(feature="decoder_pcm")] | |
127 | mod pcm; | |
128 | ||
129 | const DECODERS: &[DecoderInfo] = &[ | |
130 | #[cfg(feature="decoder_gdvvid")] | |
131 | DecoderInfo { name: "gdv-video", get_decoder: gremlinvideo::get_decoder }, | |
132 | #[cfg(feature="decoder_indeo2")] | |
133 | DecoderInfo { name: "indeo2", get_decoder: indeo::indeo2::get_decoder }, | |
134 | #[cfg(feature="decoder_indeo3")] | |
135 | DecoderInfo { name: "indeo3", get_decoder: indeo::indeo3::get_decoder }, | |
136 | #[cfg(feature="decoder_intel263")] | |
137 | DecoderInfo { name: "intel263", get_decoder: h263::intel263::get_decoder }, | |
138 | ||
139 | #[cfg(feature="decoder_pcm")] | |
140 | DecoderInfo { name: "pcm", get_decoder: pcm::get_decoder }, | |
141 | #[cfg(feature="decoder_imc")] | |
142 | DecoderInfo { name: "imc", get_decoder: indeo::imc::get_decoder_imc }, | |
143 | #[cfg(feature="decoder_imc")] | |
144 | DecoderInfo { name: "iac", get_decoder: indeo::imc::get_decoder_iac }, | |
145 | ]; | |
146 | ||
147 | pub fn find_decoder(name: &str) -> Option<fn () -> Box<NADecoder>> { | |
148 | for &dec in DECODERS { | |
149 | if dec.name == name { | |
150 | return Some(dec.get_decoder); | |
151 | } | |
152 | } | |
153 | None | |
154 | } |