use nihav_core::formats::*;
use nihav_core::codecs::*;
+#[cfg(feature="encoder_pcm")]
use nihav_core::io::byteio::*;
-struct PCMDecoder { chmap: NAChannelMap }
+#[derive(Clone,Copy,Debug,PartialEq)]
+#[cfg(feature="decoder_pcm")]
+enum PCMMode {
+ Infinity,
+ ALaw,
+ MuLaw,
+}
+
+#[cfg(feature="decoder_pcm")]
+struct PCMDecoder {
+ chmap: NAChannelMap,
+ mode: PCMMode,
+}
+
+#[cfg(feature="decoder_pcm")]
+fn cvt_alaw(val: u8) -> i16 {
+ let val = val ^ 0x55;
+ let sign = (val & 0x80) != 0;
+ let exp = ((val >> 4) & 7) + 4;
+ let mant = (val & 0xF) + if exp != 0 { 16 } else { 0 };
+ let aval = i16::from(mant) << exp;
+ if sign { aval } else { -aval }
+}
+#[cfg(feature="decoder_pcm")]
+fn cvt_mulaw(val: u8) -> i16 {
+ let val = !val;
+ let sign = (val & 0x80) != 0;
+ let exp = ((val >> 4) & 7) + 3;
+ let mant = (val & 0xF) | 0x10;
+ let aval = (i16::from(mant) << exp) - 128 - 4;
+ if !sign { aval } else { -aval }
+}
+
+#[cfg(feature="decoder_pcm")]
impl PCMDecoder {
- fn new() -> Self {
- PCMDecoder { chmap: NAChannelMap::new() }
+ fn new(mode: PCMMode) -> Self {
+ PCMDecoder { chmap: NAChannelMap::new(), mode }
+ }
+ fn decode_xlaw(&self, pkt: &NAPacket, duration: u64, srate: u32) -> DecoderResult<NAFrameRef> {
+ let pktbuf = pkt.get_buffer();
+ let channels = self.chmap.num_channels();
+ let abuf = alloc_audio_buffer(NAAudioInfo::new(srate, channels as u8, SND_S16_FORMAT, 1), duration as usize, self.chmap.clone())?;
+ let mut buf = abuf.get_abuf_i16().unwrap();
+ let dst = buf.get_data_mut().unwrap();
+ for (src, dst) in pktbuf.chunks(channels).zip(dst.chunks_mut(channels)) {
+ for (isamp, dsamp) in src.iter().zip(dst.iter_mut()) {
+ *dsamp = if self.mode == PCMMode::ALaw { cvt_alaw(*isamp) } else { cvt_mulaw(*isamp) };
+ }
+ }
+ let info = pkt.get_stream().get_info();
+ let mut frm = NAFrame::new_from_pkt(pkt, info, abuf);
+ frm.set_duration(Some(duration));
+ frm.set_keyframe(true);
+ Ok(frm.into_ref())
}
}
+#[cfg(feature="decoder_pcm")]
const CHMAP_MONO: [NAChannelType; 1] = [NAChannelType::C];
+#[cfg(feature="decoder_pcm")]
const CHMAP_STEREO: [NAChannelType; 2] = [NAChannelType::L, NAChannelType::R];
+#[cfg(feature="decoder_pcm")]
fn get_default_chmap(nch: u8) -> NAChannelMap {
let mut chmap = NAChannelMap::new();
match nch {
chmap
}
+#[cfg(feature="decoder_pcm")]
fn get_duration(ainfo: &NAAudioInfo, duration: Option<u64>, data_size: usize) -> u64 {
if duration == None {
let size_bits = (data_size as u64) * 8;
}
}
+#[cfg(feature="decoder_pcm")]
impl NADecoder for PCMDecoder {
fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
if let NACodecTypeInfo::Audio(ainfo) = info.get_properties() {
let info = pkt.get_stream().get_info();
if let NACodecTypeInfo::Audio(ainfo) = info.get_properties() {
let duration = get_duration(&ainfo, pkt.get_duration(), pkt.get_buffer().len());
+ if self.mode != PCMMode::Infinity {
+ return self.decode_xlaw(pkt, duration, ainfo.sample_rate);
+ }
let pktbuf = pkt.get_buffer();
let abuf = NAAudioBuffer::new_from_buf(ainfo, pktbuf, self.chmap.clone());
let mut frm = NAFrame::new_from_pkt(pkt, info, NABufferType::AudioPacked(abuf));
}
}
+#[cfg(feature="decoder_pcm")]
impl NAOptionHandler for PCMDecoder {
fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
fn set_options(&mut self, _options: &[NAOption]) { }
fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
}
+#[cfg(feature="decoder_pcm")]
pub fn get_decoder() -> Box<dyn NADecoder + Send> {
- Box::new(PCMDecoder::new())
+ Box::new(PCMDecoder::new(PCMMode::Infinity))
}
+#[cfg(feature="decoder_pcm")]
+pub fn get_a_law_decoder() -> Box<dyn NADecoder + Send> {
+ Box::new(PCMDecoder::new(PCMMode::ALaw))
+}
+
+#[cfg(feature="decoder_pcm")]
+pub fn get_mu_law_decoder() -> Box<dyn NADecoder + Send> {
+ Box::new(PCMDecoder::new(PCMMode::MuLaw))
+}
+
+#[cfg(feature="encoder_pcm")]
struct PCMEncoder {
stream: Option<NAStreamRef>,
pkt: Option<NAPacket>,
}
+#[cfg(feature="encoder_pcm")]
impl PCMEncoder {
fn new() -> Self {
PCMEncoder {
}
}
+#[allow(unused_macros)]
macro_rules! write_buffer {
($abuf: expr, $dvec: expr, $write_be: ident, $write_le: ident, $dtype: tt) => {
let info = $abuf.get_info();
}
}
+#[cfg(feature="encoder_pcm")]
impl NAEncoder for PCMEncoder {
fn negotiate_format(&self, encinfo: &EncodeParameters) -> EncoderResult<EncodeParameters> {
match encinfo.format {
NACodecTypeInfo::None => {
- let mut ofmt = EncodeParameters::default();
- ofmt.format = NACodecTypeInfo::Audio(NAAudioInfo::new(0, 0, SND_S16P_FORMAT, 0));
- Ok(ofmt)
+ Ok(EncodeParameters {
+ format: NACodecTypeInfo::Audio(NAAudioInfo::new(0, 0, SND_S16P_FORMAT, 0)),
+ ..Default::default()
+ })
},
- NACodecTypeInfo::Video(_) => return Err(EncoderError::FormatError),
+ NACodecTypeInfo::Video(_) => Err(EncoderError::FormatError),
NACodecTypeInfo::Audio(_) => {
Ok(*encinfo)
}
}
}
+ fn get_capabilities(&self) -> u64 { ENC_CAPS_CBR }
fn init(&mut self, stream_id: u32, encinfo: EncodeParameters) -> EncoderResult<NAStreamRef> {
match encinfo.format {
NACodecTypeInfo::None => Err(EncoderError::FormatError),
NACodecTypeInfo::Video(_) => Err(EncoderError::FormatError),
NACodecTypeInfo::Audio(_) => {
let info = NACodecInfo::new("pcm", encinfo.format, None);
- let mut stream = NAStream::new(StreamType::Audio, stream_id, info, encinfo.tb_num, encinfo.tb_den);
+ let mut stream = NAStream::new(StreamType::Audio, stream_id, info, encinfo.tb_num, encinfo.tb_den, 0);
stream.set_num(stream_id as usize);
let stream = stream.into_ref();
self.stream = Some(stream.clone());
}
}
+#[cfg(feature="encoder_pcm")]
impl NAOptionHandler for PCMEncoder {
fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
fn set_options(&mut self, _options: &[NAOption]) { }
fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
}
+#[cfg(feature="encoder_pcm")]
pub fn get_encoder() -> Box<dyn NAEncoder + Send> {
Box::new(PCMEncoder::new())
}