From: Kostya Shishkov Date: Mon, 25 May 2020 14:03:18 +0000 (+0200) Subject: add WAV demuxer X-Git-Url: https://git.nihav.org/?a=commitdiff_plain;h=283abfa6154b38880dc6378d9a618aec4fc2eefe;p=nihav.git add WAV demuxer --- diff --git a/nihav-commonfmt/Cargo.toml b/nihav-commonfmt/Cargo.toml index 5807da8..f50fa5a 100644 --- a/nihav-commonfmt/Cargo.toml +++ b/nihav-commonfmt/Cargo.toml @@ -22,9 +22,10 @@ default = ["all_decoders", "all_demuxers", "all_muxers"] decoders = [] demuxers = [] muxers = [] -all_demuxers = ["demuxer_avi", "demuxer_mov"] +all_demuxers = ["demuxer_avi", "demuxer_mov", "demuxer_wav"] demuxer_avi = ["demuxers"] demuxer_mov = ["demuxers"] +demuxer_wav = ["demuxers"] all_muxers = ["muxer_avi"] muxer_avi = ["muxers"] diff --git a/nihav-commonfmt/src/demuxers/mod.rs b/nihav-commonfmt/src/demuxers/mod.rs index 2796557..521cecf 100644 --- a/nihav-commonfmt/src/demuxers/mod.rs +++ b/nihav-commonfmt/src/demuxers/mod.rs @@ -11,12 +11,16 @@ macro_rules! validate { mod avi; #[cfg(feature="demuxer_mov")] mod mov; +#[cfg(feature="demuxer_wav")] +mod wav; const DEMUXERS: &[&DemuxerCreator] = &[ #[cfg(feature="demuxer_avi")] &avi::AVIDemuxerCreator {}, #[cfg(feature="demuxer_mov")] &mov::MOVDemuxerCreator {}, +#[cfg(feature="demuxer_wav")] + &wav::WAVDemuxerCreator {}, ]; /// Registers all available demuxers provided by this crate. diff --git a/nihav-commonfmt/src/demuxers/wav.rs b/nihav-commonfmt/src/demuxers/wav.rs new file mode 100644 index 0000000..8c41c2d --- /dev/null +++ b/nihav-commonfmt/src/demuxers/wav.rs @@ -0,0 +1,197 @@ +use nihav_core::demuxers::*; +use nihav_registry::register; +use nihav_core::demuxers::DemuxerError::*; + +macro_rules! mktag { + ($a:expr, $b:expr, $c:expr, $d:expr) => { + (($a as u32) << 24) | (($b as u32) << 16) | (($c as u32) << 8) | ($d as u32) + }; + ($arr:expr) => { + (($arr[0] as u32) << 24) | (($arr[1] as u32) << 16) | (($arr[2] as u32) << 8) | ($arr[3] as u32) + }; +} + +struct WAVDemuxer<'a> { + src: &'a mut ByteReader<'a>, + data_pos: u64, + data_end: u64, + srate: u32, + block_size: usize, + is_pcm: bool, + avg_bytes: u32, +} + +impl<'a> DemuxCore<'a> for WAVDemuxer<'a> { + fn open(&mut self, strmgr: &mut StreamManager, seek_index: &mut SeekIndex) -> DemuxerResult<()> { + let riff = self.src.read_u32be()?; + let riff_size = self.src.read_u32le()? as usize; + let riff_end = self.src.tell() + if riff_size > 0 { (riff_size as u64) } else { u64::from(std::u32::MAX) }; + let wave = self.src.read_u32be()?; + validate!(riff == mktag!(b"RIFF")); + validate!(wave == mktag!(b"WAVE")); + + seek_index.mode = SeekIndexMode::Automatic; + + let mut fmt_parsed = false; + let mut _duration = 0; + while self.src.tell() < riff_end { + let ctype = self.src.read_tag()?; + let csize = self.src.read_u32le()? as usize; + match &ctype { + b"fmt " => { + validate!(!fmt_parsed); + self.parse_fmt(strmgr, csize)?; + fmt_parsed = true; + }, + b"fact" => { + validate!(csize == 4); + _duration = self.src.read_u32le()? as usize; + }, + b"data" => { + validate!(fmt_parsed); + self.data_pos = self.src.tell(); + self.data_end = self.data_pos + (csize as u64); + return Ok(()); + }, + _ => { + self.src.read_skip(csize)?; + }, + }; + } + Err(DemuxerError::InvalidData) + } + + fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult { + if self.src.tell() >= self.data_end { + return Err(DemuxerError::EOF); + } + let str = strmgr.get_stream(0); + if str.is_none() { return Err(InvalidData); } + let stream = str.unwrap(); + let ts = NATimeInfo::new(None, None, None, 1, self.srate); + if self.is_pcm { + let mut bsize = self.block_size; + while bsize < 256 { + bsize <<= 1; + } + let mut buf = vec![0; bsize]; + let size = self.src.read_buf_some(buf.as_mut_slice())?; + buf.truncate(size); + Ok(NAPacket::new(stream, ts, true, buf)) + } else { + self.src.read_packet(stream, ts, true, self.block_size) + } + } + + fn seek(&mut self, time: u64, _seek_index: &SeekIndex) -> DemuxerResult<()> { + if self.block_size != 0 && self.avg_bytes != 0 { + let seek_dst = u64::from(self.avg_bytes) * time / 1000; + let seek_off = seek_dst / (self.block_size as u64) * (self.block_size as u64); + self.src.seek(SeekFrom::Start(self.data_pos + seek_off))?; + Ok(()) + } else { + Err(DemuxerError::NotImplemented) + } + } +} + +impl<'a> WAVDemuxer<'a> { + fn new(io: &'a mut ByteReader<'a>) -> Self { + WAVDemuxer { + src: io, + data_pos: 0, + data_end: 0, + srate: 0, + block_size: 0, + is_pcm: false, + avg_bytes: 0, + } + } + fn parse_fmt(&mut self, strmgr: &mut StreamManager, csize: usize) -> DemuxerResult<()> { + validate!(csize >= 14); + let format_tag = self.src.read_u16le()?; + let channels = self.src.read_u16le()?; + validate!(channels < 256); + let samples_per_sec = self.src.read_u32le()?; + let avg_bytes_per_sec = self.src.read_u32le()?; + let block_align = self.src.read_u16le()? as usize; + if block_align == 0 { + return Err(DemuxerError::NotImplemented); + } + let bits_per_sample = if csize >= 16 { self.src.read_u16le()? } else { 8 }; + validate!(channels < 256); + + let edata; + if csize > 16 { + validate!(csize >= 18); + let cb_size = self.src.read_u16le()? as usize; + let mut buf = vec![0; cb_size]; + self.src.read_buf(buf.as_mut_slice())?; + edata = Some(buf); + } else { + edata = None; + } + + let cname = register::find_codec_from_wav_twocc(format_tag).unwrap_or("unknown"); + let soniton = if cname == "pcm" { + if format_tag != 0x0003 { + if bits_per_sample == 8 { + NASoniton::new(8, 0) + } else { + NASoniton::new(bits_per_sample as u8, SONITON_FLAG_SIGNED) + } + } else { + NASoniton::new(bits_per_sample as u8, SONITON_FLAG_FLOAT) + } + } else { + NASoniton::new(bits_per_sample as u8, SONITON_FLAG_SIGNED) + }; + let ahdr = NAAudioInfo::new(samples_per_sec, channels as u8, soniton, block_align); + let ainfo = NACodecInfo::new(cname, NACodecTypeInfo::Audio(ahdr), edata); + let res = strmgr.add_stream(NAStream::new(StreamType::Audio, 0, ainfo, 1, samples_per_sec)); + if res.is_none() { return Err(MemoryError); } + + self.srate = samples_per_sec; + self.block_size = block_align; + self.avg_bytes = avg_bytes_per_sec; + self.is_pcm = cname == "pcm"; + + Ok(()) + } +} + +pub struct WAVDemuxerCreator { } + +impl DemuxerCreator for WAVDemuxerCreator { + fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box + 'a> { + Box::new(WAVDemuxer::new(br)) + } + fn get_name(&self) -> &'static str { "wav" } +} + +#[cfg(test)] +mod test { + use super::*; + use std::fs::File; + + #[test] + fn test_wav_demux() { + let mut file = File::open("assets/MS/scatter.wav").unwrap(); + let mut fr = FileReader::new_read(&mut file); + let mut br = ByteReader::new(&mut fr); + let mut dmx = WAVDemuxer::new(&mut br); + let mut sm = StreamManager::new(); + let mut si = SeekIndex::new(); + dmx.open(&mut sm, &mut si).unwrap(); + + loop { + let pktres = dmx.get_frame(&mut sm); + if let Err(e) = pktres { + if e == DemuxerError::EOF { break; } + panic!("error"); + } + let pkt = pktres.unwrap(); + println!("Got {}", pkt); + } + } +} diff --git a/nihav-registry/src/detect.rs b/nihav-registry/src/detect.rs index 7d0633a..2621000 100644 --- a/nihav-registry/src/detect.rs +++ b/nihav-registry/src/detect.rs @@ -198,6 +198,13 @@ const DETECTORS: &[DetectConditions] = &[ &CC::Str(b"ON2fLIST")) }, ] }, + DetectConditions { + demux_name: "wav", + extensions: ".wav", + conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"RIFF") }, + CheckItem{offs: 8, cond: &CC::Str(b"WAVEfmt ") } + ] + }, DetectConditions { demux_name: "mov", extensions: ".mov",