[nihav.git] / nihav-commonfmt / src / demuxers / wav.rs

use nihav_core::demuxers::*;
use nihav_registry::register;
use nihav_core::demuxers::DemuxerError::*;

macro_rules! mktag {
    ($a:expr, $b:expr, $c:expr, $d:expr) => {
        (u32::from($a) << 24) | (u32::from($b) << 16) | (u32::from($c) << 8) | u32::from($d)
    };
    ($arr:expr) => {
        (u32::from($arr[0]) << 24) | (u32::from($arr[1]) << 16) | (u32::from($arr[2]) << 8) | u32::from($arr[3])
    };
}

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,
    duration:       u64,

    force_tb_num:   u32,
    force_tb_den:   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);

                    if duration != 0 {
                        self.duration = (duration as u64) * 1000 / u64::from(self.srate);
                    } else if self.avg_bytes > 0 {
                        self.duration = (self.data_end - self.data_pos) * 1000 / u64::from(self.avg_bytes);
                    } else {
                        self.duration = 0;
                    }

                    return Ok(());
                },
                _ => {
                                          self.src.read_skip(csize)?;
                },
            };
        }
        Err(DemuxerError::InvalidData)
    }

    fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
        if self.src.tell() >= self.data_end {
            return Err(DemuxerError::EOF);
        }
        let strm = strmgr.get_stream(0);
        if strm.is_none() { return Err(InvalidData); }
        let stream = strm.unwrap();
        let pts = if self.avg_bytes != 0 {
                let pos = self.src.tell() - self.data_pos;
                Some(pos * u64::from(self.srate) / u64::from(self.avg_bytes))
            } else {
                None
            };
        let ts = NATimeInfo::new(pts, None, None, 1, self.srate);
        if self.is_pcm {
            let bsize = if self.force_tb_num != 0 && self.force_tb_den != 0 {
                    let nbsize = u64::from(self.avg_bytes) * u64::from(self.force_tb_num) / u64::from(self.force_tb_den);
                    let mut nbsize = nbsize as usize + self.block_size - 1;
                    nbsize /= self.block_size;
                    nbsize *= self.block_size;
                    nbsize
                } else {
                    let mut bsize = self.block_size;
                    while bsize < 256 {
                        bsize <<= 1;
                    }
                    bsize
                };
            let mut buf = vec![0; bsize];
            let mut tot_size = 0;
            while let Ok(psize)         = self.src.read_buf_some(&mut buf[tot_size..]) {
                tot_size += psize;
                if tot_size == buf.len() {
                    break;
                }
            }
            buf.truncate(tot_size);
            Ok(NAPacket::new(stream, ts, true, buf))
        } else {
            self.src.read_packet(stream, ts, true, self.block_size)
        }
    }

    fn seek(&mut self, time: NATimePoint, _seek_index: &SeekIndex) -> DemuxerResult<()> {
        if self.block_size != 0 && self.avg_bytes != 0 {
            let seek_off = match time {
                    NATimePoint::Milliseconds(ms) => {
                        let seek_dst = u64::from(self.avg_bytes) * ms / 1000;
                        seek_dst / (self.block_size as u64) * (self.block_size as u64)
                    },
                    NATimePoint::PTS(pts) => (self.block_size as u64) * pts,
                    NATimePoint::None => return Ok(()),
                };
            self.src.seek(SeekFrom::Start(self.data_pos + seek_off))?;
            Ok(())
        } else {
            Err(DemuxerError::NotImplemented)
        }
    }

    fn get_duration(&self) -> u64 { self.duration }
}

const WAV_OPTIONS: &[NAOptionDefinition] = &[
    NAOptionDefinition {
        name: "force_tb_num", description: "force timebase numerator for PCM blocks",
        opt_type: NAOptionDefinitionType::Int(Some(1), None) },
    NAOptionDefinition {
        name: "force_tb_den", description: "force timebase denominator for PCM blocks",
        opt_type: NAOptionDefinitionType::Int(Some(1), None) },
];

impl<'a> NAOptionHandler for WAVDemuxer<'a> {
    fn get_supported_options(&self) -> &[NAOptionDefinition] { WAV_OPTIONS }
    fn set_options(&mut self, options: &[NAOption]) {
        for option in options.iter() {
            match (option.name, &option.value) {
                ("force_tb_num", NAValue::Int(ref ival)) => {
                    self.force_tb_num = *ival as u32;
                },
                ("force_tb_den", NAValue::Int(ref ival)) => {
                    self.force_tb_den = *ival as u32;
                },
                _ => {},
            };
        }
    }
    fn query_option_value(&self, name: &str) -> Option<NAValue> {
        match name {
            "force_tb_num" => Some(NAValue::Int(i64::from(self.force_tb_num))),
            "force_tb_den" => Some(NAValue::Int(i64::from(self.force_tb_den))),
            _ => None,
        }
    }
}

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,
            duration:   0,
            force_tb_num:   0,
            force_tb_den:   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())?;
                Some(buf)
            } else {
                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, 0));
        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";
        if self.is_pcm && self.avg_bytes == 0 {
            self.avg_bytes = self.block_size as u32 * self.srate;
        }

        Ok(())
    }
}

pub struct WAVDemuxerCreator { }

impl DemuxerCreator for WAVDemuxerCreator {
    fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + '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() {
        // sample: https://samples.mplayerhq.hu/A-codecs/msadpcm-stereo/scatter.wav
        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);
        }
    }
}
Commit	Line	Data
	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	force_tb_num: u32,
	25	force_tb_den: u32,
	26	}
	27
	28	impl<'a> DemuxCore<'a> for WAVDemuxer<'a> {
	29	fn open(&mut self, strmgr: &mut StreamManager, seek_index: &mut SeekIndex) -> DemuxerResult<()> {
	30	let riff = self.src.read_u32be()?;
	31	let riff_size = self.src.read_u32le()? as usize;
	32	let riff_end = self.src.tell() + if riff_size > 0 { riff_size as u64 } else { u64::from(std::u32::MAX) };
	33	let wave = self.src.read_u32be()?;
	34	validate!(riff == mktag!(b"RIFF"));
	35	validate!(wave == mktag!(b"WAVE"));
	36
	37	seek_index.mode = SeekIndexMode::Automatic;
	38
	39	let mut fmt_parsed = false;
	40	let mut duration = 0;
	41	while self.src.tell() < riff_end {
	42	let ctype = self.src.read_tag()?;
	43	let csize = self.src.read_u32le()? as usize;
	44	match &ctype {
	45	b"fmt " => {
	46	validate!(!fmt_parsed);
	47	self.parse_fmt(strmgr, csize)?;
	48	fmt_parsed = true;
	49	},
	50	b"fact" => {
	51	validate!(csize == 4);
	52	duration = self.src.read_u32le()? as usize;
	53	},
	54	b"data" => {
	55	validate!(fmt_parsed);
	56	self.data_pos = self.src.tell();
	57	self.data_end = self.data_pos + (csize as u64);
	58
	59	if duration != 0 {
	60	self.duration = (duration as u64) * 1000 / u64::from(self.srate);
	61	} else if self.avg_bytes > 0 {
	62	self.duration = (self.data_end - self.data_pos) * 1000 / u64::from(self.avg_bytes);
	63	} else {
	64	self.duration = 0;
	65	}
	66
	67	return Ok(());
	68	},
	69	_ => {
	70	self.src.read_skip(csize)?;
	71	},
	72	};
	73	}
	74	Err(DemuxerError::InvalidData)
	75	}
	76
	77	fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
	78	if self.src.tell() >= self.data_end {
	79	return Err(DemuxerError::EOF);
	80	}
	81	let strm = strmgr.get_stream(0);
	82	if strm.is_none() { return Err(InvalidData); }
	83	let stream = strm.unwrap();
	84	let pts = if self.avg_bytes != 0 {
	85	let pos = self.src.tell() - self.data_pos;
	86	Some(pos * u64::from(self.srate) / u64::from(self.avg_bytes))
	87	} else {
	88	None
	89	};
	90	let ts = NATimeInfo::new(pts, None, None, 1, self.srate);
	91	if self.is_pcm {
	92	let bsize = if self.force_tb_num != 0 && self.force_tb_den != 0 {
	93	let nbsize = u64::from(self.avg_bytes) * u64::from(self.force_tb_num) / u64::from(self.force_tb_den);
	94	let mut nbsize = nbsize as usize + self.block_size - 1;
	95	nbsize /= self.block_size;
	96	nbsize *= self.block_size;
	97	nbsize
	98	} else {
	99	let mut bsize = self.block_size;
	100	while bsize < 256 {
	101	bsize <<= 1;
	102	}
	103	bsize
	104	};
	105	let mut buf = vec![0; bsize];
	106	let mut tot_size = 0;
	107	while let Ok(psize) = self.src.read_buf_some(&mut buf[tot_size..]) {
	108	tot_size += psize;
	109	if tot_size == buf.len() {
	110	break;
	111	}
	112	}
	113	buf.truncate(tot_size);
	114	Ok(NAPacket::new(stream, ts, true, buf))
	115	} else {
	116	self.src.read_packet(stream, ts, true, self.block_size)
	117	}
	118	}
	119
	120	fn seek(&mut self, time: NATimePoint, _seek_index: &SeekIndex) -> DemuxerResult<()> {
	121	if self.block_size != 0 && self.avg_bytes != 0 {
	122	let seek_off = match time {
	123	NATimePoint::Milliseconds(ms) => {
	124	let seek_dst = u64::from(self.avg_bytes) * ms / 1000;
	125	seek_dst / (self.block_size as u64) * (self.block_size as u64)
	126	},
	127	NATimePoint::PTS(pts) => (self.block_size as u64) * pts,
	128	NATimePoint::None => return Ok(()),
	129	};
	130	self.src.seek(SeekFrom::Start(self.data_pos + seek_off))?;
	131	Ok(())
	132	} else {
	133	Err(DemuxerError::NotImplemented)
	134	}
	135	}
	136
	137	fn get_duration(&self) -> u64 { self.duration }
	138	}
	139
	140	const WAV_OPTIONS: &[NAOptionDefinition] = &[
	141	NAOptionDefinition {
	142	name: "force_tb_num", description: "force timebase numerator for PCM blocks",
	143	opt_type: NAOptionDefinitionType::Int(Some(1), None) },
	144	NAOptionDefinition {
	145	name: "force_tb_den", description: "force timebase denominator for PCM blocks",
	146	opt_type: NAOptionDefinitionType::Int(Some(1), None) },
	147	];
	148
	149	impl<'a> NAOptionHandler for WAVDemuxer<'a> {
	150	fn get_supported_options(&self) -> &[NAOptionDefinition] { WAV_OPTIONS }
	151	fn set_options(&mut self, options: &[NAOption]) {
	152	for option in options.iter() {
	153	match (option.name, &option.value) {
	154	("force_tb_num", NAValue::Int(ref ival)) => {
	155	self.force_tb_num = *ival as u32;
	156	},
	157	("force_tb_den", NAValue::Int(ref ival)) => {
	158	self.force_tb_den = *ival as u32;
	159	},
	160	_ => {},
	161	};
	162	}
	163	}
	164	fn query_option_value(&self, name: &str) -> Option<NAValue> {
	165	match name {
	166	"force_tb_num" => Some(NAValue::Int(i64::from(self.force_tb_num))),
	167	"force_tb_den" => Some(NAValue::Int(i64::from(self.force_tb_den))),
	168	_ => None,
	169	}
	170	}
	171	}
	172
	173	impl<'a> WAVDemuxer<'a> {
	174	fn new(io: &'a mut ByteReader<'a>) -> Self {
	175	WAVDemuxer {
	176	src: io,
	177	data_pos: 0,
	178	data_end: 0,
	179	srate: 0,
	180	block_size: 0,
	181	is_pcm: false,
	182	avg_bytes: 0,
	183	duration: 0,
	184	force_tb_num: 0,
	185	force_tb_den: 0,
	186	}
	187	}
	188	fn parse_fmt(&mut self, strmgr: &mut StreamManager, csize: usize) -> DemuxerResult<()> {
	189	validate!(csize >= 14);
	190	let format_tag = self.src.read_u16le()?;
	191	let channels = self.src.read_u16le()?;
	192	validate!(channels < 256);
	193	let samples_per_sec = self.src.read_u32le()?;
	194	let avg_bytes_per_sec = self.src.read_u32le()?;
	195	let block_align = self.src.read_u16le()? as usize;
	196	if block_align == 0 {
	197	return Err(DemuxerError::NotImplemented);
	198	}
	199	let bits_per_sample = if csize >= 16 { self.src.read_u16le()? } else { 8 };
	200	validate!(channels < 256);
	201
	202	let edata = if csize > 16 {
	203	validate!(csize >= 18);
	204	let cb_size = self.src.read_u16le()? as usize;
	205	let mut buf = vec![0; cb_size];
	206	self.src.read_buf(buf.as_mut_slice())?;
	207	Some(buf)
	208	} else {
	209	None
	210	};
	211
	212	let cname = register::find_codec_from_wav_twocc(format_tag).unwrap_or("unknown");
	213	let soniton = if cname == "pcm" {
	214	if format_tag != 0x0003 {
	215	if bits_per_sample == 8 {
	216	NASoniton::new(8, 0)
	217	} else {
	218	NASoniton::new(bits_per_sample as u8, SONITON_FLAG_SIGNED)
	219	}
	220	} else {
	221	NASoniton::new(bits_per_sample as u8, SONITON_FLAG_FLOAT)
	222	}
	223	} else {
	224	NASoniton::new(bits_per_sample as u8, SONITON_FLAG_SIGNED)
	225	};
	226	let ahdr = NAAudioInfo::new(samples_per_sec, channels as u8, soniton, block_align);
	227	let ainfo = NACodecInfo::new(cname, NACodecTypeInfo::Audio(ahdr), edata);
	228	let res = strmgr.add_stream(NAStream::new(StreamType::Audio, 0, ainfo, 1, samples_per_sec, 0));
	229	if res.is_none() { return Err(MemoryError); }
	230
	231	self.srate = samples_per_sec;
	232	self.block_size = block_align;
	233	self.avg_bytes = avg_bytes_per_sec;
	234	self.is_pcm = cname == "pcm";
	235	if self.is_pcm && self.avg_bytes == 0 {
	236	self.avg_bytes = self.block_size as u32 * self.srate;
	237	}
	238
	239	Ok(())
	240	}
	241	}
	242
	243	pub struct WAVDemuxerCreator { }
	244
	245	impl DemuxerCreator for WAVDemuxerCreator {
	246	fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> {
	247	Box::new(WAVDemuxer::new(br))
	248	}
	249	fn get_name(&self) -> &'static str { "wav" }
	250	}
	251
	252	#[cfg(test)]
	253	mod test {
	254	use super::*;
	255	use std::fs::File;
	256
	257	#[test]
	258	fn test_wav_demux() {
	259	// sample: https://samples.mplayerhq.hu/A-codecs/msadpcm-stereo/scatter.wav
	260	let mut file = File::open("assets/MS/scatter.wav").unwrap();
	261	let mut fr = FileReader::new_read(&mut file);
	262	let mut br = ByteReader::new(&mut fr);
	263	let mut dmx = WAVDemuxer::new(&mut br);
	264	let mut sm = StreamManager::new();
	265	let mut si = SeekIndex::new();
	266	dmx.open(&mut sm, &mut si).unwrap();
	267
	268	loop {
	269	let pktres = dmx.get_frame(&mut sm);
	270	if let Err(e) = pktres {
	271	if e == DemuxerError::EOF { break; }
	272	panic!("error");
	273	}
	274	let pkt = pktres.unwrap();
	275	println!("Got {}", pkt);
	276	}
	277	}
	278	}