]> git.nihav.org Git - nihav.git/blame - nihav-ms/src/codecs/imaadpcm.rs
h264: make debug and release versions of MC functions for better performance
[nihav.git] / nihav-ms / src / codecs / imaadpcm.rs
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1use nihav_core::codecs::*;
2use nihav_core::io::byteio::*;
3use nihav_codec_support::codecs::imaadpcm::*;
4use std::str::FromStr;
5
6struct IMAADPCMDecoder {
7 ainfo: NAAudioInfo,
8 chmap: NAChannelMap,
9 ch_state: [IMAState; 2],
10 block_len: usize,
11}
12
13impl IMAADPCMDecoder {
14 fn new() -> Self {
15 Self {
16 ainfo: NAAudioInfo::new(0, 1, SND_S16P_FORMAT, 0),
17 chmap: NAChannelMap::new(),
18 ch_state: [IMAState::new(), IMAState::new()],
19 block_len: 0,
20 }
21 }
22}
23
24impl NADecoder for IMAADPCMDecoder {
25 fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
26 if let NACodecTypeInfo::Audio(ainfo) = info.get_properties() {
27 self.block_len = ainfo.get_block_len();
28 let channels = ainfo.get_channels() as usize;
29 validate!(channels == 2 || channels == 1);
30 validate!(self.block_len >= 8 * channels);
31 validate!((self.block_len & 3) == 0);
32 let len = (self.block_len / channels - 4) * 2 + 1;
33 self.ainfo = NAAudioInfo::new(ainfo.get_sample_rate(), channels as u8, SND_S16P_FORMAT, len);
34 self.chmap = NAChannelMap::from_str(if channels == 1 { "C" } else { "L,R" }).unwrap();
35 Ok(())
36 } else {
37 Err(DecoderError::InvalidData)
38 }
39 }
40 fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
41 let info = pkt.get_stream().get_info();
42 if let NACodecTypeInfo::Audio(_) = info.get_properties() {
43 let pktbuf = pkt.get_buffer();
44 let channels = self.chmap.num_channels();
45 validate!(pktbuf.len() >= 8 * channels);
46 let nsamples = (pktbuf.len() / channels - 4) * 2 + 1;
47 let abuf = alloc_audio_buffer(self.ainfo, nsamples, self.chmap.clone())?;
48 let mut adata = abuf.get_abuf_i16().unwrap();
49 let mut off = [adata.get_offset(0), adata.get_offset(1)];
50 let dst = adata.get_data_mut().unwrap();
51
52 let mut mr = MemoryReader::new_read(pktbuf.as_slice());
53 let mut br = ByteReader::new(&mut mr);
54 for ch in 0..channels {
55 let pred = br.read_u16le()? as i16;
56 let step = br.read_byte()?;
57 br.read_skip(1)?;
58 validate!(step <= IMA_MAX_STEP);
59 self.ch_state[ch].reset(pred, step);
60 dst[off[ch]] = pred;
61 off[ch] += 1;
62 }
63 while br.left() > 0 {
64 for ch in 0..channels {
65 let mut cw = br.read_u32le()?;
66 for _ in 0..8 {
67 dst[off[ch]] = self.ch_state[ch].expand_sample((cw & 0xF) as u8);
68 off[ch] += 1;
69 cw >>= 4;
70 }
71 }
72 }
73 let mut frm = NAFrame::new_from_pkt(pkt, info.replace_info(NACodecTypeInfo::Audio(self.ainfo)), abuf);
74 frm.set_duration(Some(nsamples as u64));
75 frm.set_keyframe(false);
76 Ok(frm.into_ref())
77 } else {
78 Err(DecoderError::InvalidData)
79 }
80 }
81 fn flush(&mut self) {
82 }
83}
84
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85impl NAOptionHandler for IMAADPCMDecoder {
86 fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
87 fn set_options(&mut self, _options: &[NAOption]) { }
88 fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
89}
90
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91pub fn get_decoder() -> Box<dyn NADecoder + Send> {
92 Box::new(IMAADPCMDecoder::new())
93}
94
95#[cfg(test)]
96mod test {
97 use nihav_core::codecs::RegisteredDecoders;
98 use nihav_core::demuxers::RegisteredDemuxers;
99 use nihav_codec_support::test::dec_video::*;
78fb6560 100 use crate::ms_register_all_decoders;
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101 use nihav_commonfmt::generic_register_all_demuxers;
102 #[test]
103 fn test_ima_adpcm_ms() {
104 let mut dmx_reg = RegisteredDemuxers::new();
105 generic_register_all_demuxers(&mut dmx_reg);
106 let mut dec_reg = RegisteredDecoders::new();
78fb6560 107 ms_register_all_decoders(&mut dec_reg);
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108
109 test_decoding("avi", "ima-adpcm-ms", "assets/MS/IMAG0006.AVI", None, &dmx_reg, &dec_reg,
110 ExpectedTestResult::MD5([0x0cdc640f, 0xb00df235, 0x1ec4a280, 0x065b5e9e]));
111 }
112}