| 1 | use nihav_core::demuxers::*; |
| 2 | use nihav_registry::register; |
| 3 | use nihav_core::demuxers::DemuxerError::*; |
| 4 | |
| 5 | macro_rules! mktag { |
| 6 | ($a:expr, $b:expr, $c:expr, $d:expr) => { |
| 7 | (u32::from($a) << 24) | (u32::from($b) << 16) | (u32::from($c) << 8) | u32::from($d) |
| 8 | }; |
| 9 | ($arr:expr) => { |
| 10 | (u32::from($arr[0]) << 24) | (u32::from($arr[1]) << 16) | (u32::from($arr[2]) << 8) | u32::from($arr[3]) |
| 11 | }; |
| 12 | } |
| 13 | |
| 14 | struct WAVDemuxer<'a> { |
| 15 | src: &'a mut ByteReader<'a>, |
| 16 | data_pos: u64, |
| 17 | data_end: u64, |
| 18 | srate: u32, |
| 19 | block_size: usize, |
| 20 | is_pcm: bool, |
| 21 | avg_bytes: u32, |
| 22 | duration: u64, |
| 23 | } |
| 24 | |
| 25 | impl<'a> DemuxCore<'a> for WAVDemuxer<'a> { |
| 26 | fn open(&mut self, strmgr: &mut StreamManager, seek_index: &mut SeekIndex) -> DemuxerResult<()> { |
| 27 | let riff = self.src.read_u32be()?; |
| 28 | let riff_size = self.src.read_u32le()? as usize; |
| 29 | let riff_end = self.src.tell() + if riff_size > 0 { riff_size as u64 } else { u64::from(std::u32::MAX) }; |
| 30 | let wave = self.src.read_u32be()?; |
| 31 | validate!(riff == mktag!(b"RIFF")); |
| 32 | validate!(wave == mktag!(b"WAVE")); |
| 33 | |
| 34 | seek_index.mode = SeekIndexMode::Automatic; |
| 35 | |
| 36 | let mut fmt_parsed = false; |
| 37 | let mut duration = 0; |
| 38 | while self.src.tell() < riff_end { |
| 39 | let ctype = self.src.read_tag()?; |
| 40 | let csize = self.src.read_u32le()? as usize; |
| 41 | match &ctype { |
| 42 | b"fmt " => { |
| 43 | validate!(!fmt_parsed); |
| 44 | self.parse_fmt(strmgr, csize)?; |
| 45 | fmt_parsed = true; |
| 46 | }, |
| 47 | b"fact" => { |
| 48 | validate!(csize == 4); |
| 49 | duration = self.src.read_u32le()? as usize; |
| 50 | }, |
| 51 | b"data" => { |
| 52 | validate!(fmt_parsed); |
| 53 | self.data_pos = self.src.tell(); |
| 54 | self.data_end = self.data_pos + (csize as u64); |
| 55 | |
| 56 | if duration != 0 { |
| 57 | self.duration = (duration as u64) * 1000 / u64::from(self.srate); |
| 58 | } else if self.avg_bytes > 0 { |
| 59 | self.duration = (self.data_end - self.data_pos) * 1000 / u64::from(self.avg_bytes); |
| 60 | } else { |
| 61 | self.duration = 0; |
| 62 | } |
| 63 | |
| 64 | return Ok(()); |
| 65 | }, |
| 66 | _ => { |
| 67 | self.src.read_skip(csize)?; |
| 68 | }, |
| 69 | }; |
| 70 | } |
| 71 | Err(DemuxerError::InvalidData) |
| 72 | } |
| 73 | |
| 74 | fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> { |
| 75 | if self.src.tell() >= self.data_end { |
| 76 | return Err(DemuxerError::EOF); |
| 77 | } |
| 78 | let str = strmgr.get_stream(0); |
| 79 | if str.is_none() { return Err(InvalidData); } |
| 80 | let stream = str.unwrap(); |
| 81 | let pts = if self.avg_bytes != 0 { |
| 82 | let pos = self.src.tell() - self.data_pos; |
| 83 | Some(pos * u64::from(self.srate) / u64::from(self.avg_bytes)) |
| 84 | } else { |
| 85 | None |
| 86 | }; |
| 87 | let ts = NATimeInfo::new(pts, None, None, 1, self.srate); |
| 88 | if self.is_pcm { |
| 89 | let mut bsize = self.block_size; |
| 90 | while bsize < 256 { |
| 91 | bsize <<= 1; |
| 92 | } |
| 93 | let mut buf = vec![0; bsize]; |
| 94 | let size = self.src.read_buf_some(buf.as_mut_slice())?; |
| 95 | buf.truncate(size); |
| 96 | Ok(NAPacket::new(stream, ts, true, buf)) |
| 97 | } else { |
| 98 | self.src.read_packet(stream, ts, true, self.block_size) |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | fn seek(&mut self, time: NATimePoint, _seek_index: &SeekIndex) -> DemuxerResult<()> { |
| 103 | if self.block_size != 0 && self.avg_bytes != 0 { |
| 104 | let seek_off = match time { |
| 105 | NATimePoint::Milliseconds(ms) => { |
| 106 | let seek_dst = u64::from(self.avg_bytes) * ms / 1000; |
| 107 | seek_dst / (self.block_size as u64) * (self.block_size as u64) |
| 108 | }, |
| 109 | NATimePoint::PTS(pts) => (self.block_size as u64) * pts, |
| 110 | NATimePoint::None => return Ok(()), |
| 111 | }; |
| 112 | self.src.seek(SeekFrom::Start(self.data_pos + seek_off))?; |
| 113 | Ok(()) |
| 114 | } else { |
| 115 | Err(DemuxerError::NotImplemented) |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | fn get_duration(&self) -> u64 { self.duration } |
| 120 | } |
| 121 | |
| 122 | impl<'a> NAOptionHandler for WAVDemuxer<'a> { |
| 123 | fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] } |
| 124 | fn set_options(&mut self, _options: &[NAOption]) { } |
| 125 | fn query_option_value(&self, _name: &str) -> Option<NAValue> { None } |
| 126 | } |
| 127 | |
| 128 | impl<'a> WAVDemuxer<'a> { |
| 129 | fn new(io: &'a mut ByteReader<'a>) -> Self { |
| 130 | WAVDemuxer { |
| 131 | src: io, |
| 132 | data_pos: 0, |
| 133 | data_end: 0, |
| 134 | srate: 0, |
| 135 | block_size: 0, |
| 136 | is_pcm: false, |
| 137 | avg_bytes: 0, |
| 138 | duration: 0, |
| 139 | } |
| 140 | } |
| 141 | fn parse_fmt(&mut self, strmgr: &mut StreamManager, csize: usize) -> DemuxerResult<()> { |
| 142 | validate!(csize >= 14); |
| 143 | let format_tag = self.src.read_u16le()?; |
| 144 | let channels = self.src.read_u16le()?; |
| 145 | validate!(channels < 256); |
| 146 | let samples_per_sec = self.src.read_u32le()?; |
| 147 | let avg_bytes_per_sec = self.src.read_u32le()?; |
| 148 | let block_align = self.src.read_u16le()? as usize; |
| 149 | if block_align == 0 { |
| 150 | return Err(DemuxerError::NotImplemented); |
| 151 | } |
| 152 | let bits_per_sample = if csize >= 16 { self.src.read_u16le()? } else { 8 }; |
| 153 | validate!(channels < 256); |
| 154 | |
| 155 | let edata = if csize > 16 { |
| 156 | validate!(csize >= 18); |
| 157 | let cb_size = self.src.read_u16le()? as usize; |
| 158 | let mut buf = vec![0; cb_size]; |
| 159 | self.src.read_buf(buf.as_mut_slice())?; |
| 160 | Some(buf) |
| 161 | } else { |
| 162 | None |
| 163 | }; |
| 164 | |
| 165 | let cname = register::find_codec_from_wav_twocc(format_tag).unwrap_or("unknown"); |
| 166 | let soniton = if cname == "pcm" { |
| 167 | if format_tag != 0x0003 { |
| 168 | if bits_per_sample == 8 { |
| 169 | NASoniton::new(8, 0) |
| 170 | } else { |
| 171 | NASoniton::new(bits_per_sample as u8, SONITON_FLAG_SIGNED) |
| 172 | } |
| 173 | } else { |
| 174 | NASoniton::new(bits_per_sample as u8, SONITON_FLAG_FLOAT) |
| 175 | } |
| 176 | } else { |
| 177 | NASoniton::new(bits_per_sample as u8, SONITON_FLAG_SIGNED) |
| 178 | }; |
| 179 | let ahdr = NAAudioInfo::new(samples_per_sec, channels as u8, soniton, block_align); |
| 180 | let ainfo = NACodecInfo::new(cname, NACodecTypeInfo::Audio(ahdr), edata); |
| 181 | let res = strmgr.add_stream(NAStream::new(StreamType::Audio, 0, ainfo, 1, samples_per_sec, 0)); |
| 182 | if res.is_none() { return Err(MemoryError); } |
| 183 | |
| 184 | self.srate = samples_per_sec; |
| 185 | self.block_size = block_align; |
| 186 | self.avg_bytes = avg_bytes_per_sec; |
| 187 | self.is_pcm = cname == "pcm"; |
| 188 | if self.is_pcm && self.avg_bytes == 0 { |
| 189 | self.avg_bytes = self.block_size as u32 * self.srate; |
| 190 | } |
| 191 | |
| 192 | Ok(()) |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | pub struct WAVDemuxerCreator { } |
| 197 | |
| 198 | impl DemuxerCreator for WAVDemuxerCreator { |
| 199 | fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> { |
| 200 | Box::new(WAVDemuxer::new(br)) |
| 201 | } |
| 202 | fn get_name(&self) -> &'static str { "wav" } |
| 203 | } |
| 204 | |
| 205 | #[cfg(test)] |
| 206 | mod test { |
| 207 | use super::*; |
| 208 | use std::fs::File; |
| 209 | |
| 210 | #[test] |
| 211 | fn test_wav_demux() { |
| 212 | let mut file = File::open("assets/MS/scatter.wav").unwrap(); |
| 213 | let mut fr = FileReader::new_read(&mut file); |
| 214 | let mut br = ByteReader::new(&mut fr); |
| 215 | let mut dmx = WAVDemuxer::new(&mut br); |
| 216 | let mut sm = StreamManager::new(); |
| 217 | let mut si = SeekIndex::new(); |
| 218 | dmx.open(&mut sm, &mut si).unwrap(); |
| 219 | |
| 220 | loop { |
| 221 | let pktres = dmx.get_frame(&mut sm); |
| 222 | if let Err(e) = pktres { |
| 223 | if e == DemuxerError::EOF { break; } |
| 224 | panic!("error"); |
| 225 | } |
| 226 | let pkt = pktres.unwrap(); |
| 227 | println!("Got {}", pkt); |
| 228 | } |
| 229 | } |
| 230 | } |