1 use nihav_core::formats::*;
2 use nihav_core::codecs::*;
3 #[cfg(feature="encoder_pcm")]
4 use nihav_core::io::byteio::*;
6 #[derive(Clone,Copy,Debug,PartialEq)]
7 #[cfg(feature="decoder_pcm")]
14 #[cfg(feature="decoder_pcm")]
20 #[cfg(feature="decoder_pcm")]
21 fn cvt_alaw(val: u8) -> i16 {
23 let sign = (val & 0x80) != 0;
24 let exp = ((val >> 4) & 7) + 4;
25 let mant = (val & 0xF) + if exp != 0 { 16 } else { 0 };
26 let aval = i16::from(mant) << exp;
27 if sign { aval } else { -aval }
30 #[cfg(feature="decoder_pcm")]
31 fn cvt_mulaw(val: u8) -> i16 {
33 let sign = (val & 0x80) != 0;
34 let exp = ((val >> 4) & 7) + 3;
35 let mant = (val & 0xF) | 0x10;
36 let aval = (i16::from(mant) << exp) - 128 - 4;
37 if !sign { aval } else { -aval }
40 #[cfg(feature="decoder_pcm")]
42 fn new(mode: PCMMode) -> Self {
43 PCMDecoder { chmap: NAChannelMap::new(), mode }
45 fn decode_xlaw(&self, pkt: &NAPacket, duration: u64, srate: u32) -> DecoderResult<NAFrameRef> {
46 let pktbuf = pkt.get_buffer();
47 let channels = self.chmap.num_channels();
48 let abuf = alloc_audio_buffer(NAAudioInfo::new(srate, channels as u8, SND_S16_FORMAT, 1), duration as usize, self.chmap.clone())?;
49 let mut buf = abuf.get_abuf_i16().unwrap();
50 let dst = buf.get_data_mut().unwrap();
51 for (src, dst) in pktbuf.chunks(channels).zip(dst.chunks_mut(channels)) {
52 for (isamp, dsamp) in src.iter().zip(dst.iter_mut()) {
53 *dsamp = if self.mode == PCMMode::ALaw { cvt_alaw(*isamp) } else { cvt_mulaw(*isamp) };
56 let info = pkt.get_stream().get_info();
57 let mut frm = NAFrame::new_from_pkt(pkt, info, abuf);
58 frm.set_duration(Some(duration));
59 frm.set_keyframe(true);
64 #[cfg(feature="decoder_pcm")]
65 const CHMAP_MONO: [NAChannelType; 1] = [NAChannelType::C];
66 #[cfg(feature="decoder_pcm")]
67 const CHMAP_STEREO: [NAChannelType; 2] = [NAChannelType::L, NAChannelType::R];
69 #[cfg(feature="decoder_pcm")]
70 fn get_default_chmap(nch: u8) -> NAChannelMap {
71 let mut chmap = NAChannelMap::new();
73 1 => chmap.add_channels(&CHMAP_MONO),
74 2 => chmap.add_channels(&CHMAP_STEREO),
80 #[cfg(feature="decoder_pcm")]
81 fn get_duration(ainfo: &NAAudioInfo, duration: Option<u64>, data_size: usize) -> u64 {
83 let size_bits = (data_size as u64) * 8;
84 let blk_size = u64::from(ainfo.get_channels()) * u64::from(ainfo.get_format().get_bits());
91 #[cfg(feature="decoder_pcm")]
92 impl NADecoder for PCMDecoder {
93 fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
94 if let NACodecTypeInfo::Audio(ainfo) = info.get_properties() {
95 self.chmap = get_default_chmap(ainfo.get_channels());
96 if self.chmap.num_channels() == 0 { return Err(DecoderError::InvalidData); }
99 Err(DecoderError::InvalidData)
102 fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
103 let info = pkt.get_stream().get_info();
104 if let NACodecTypeInfo::Audio(ainfo) = info.get_properties() {
105 let duration = get_duration(&ainfo, pkt.get_duration(), pkt.get_buffer().len());
106 if self.mode != PCMMode::Infinity {
107 return self.decode_xlaw(pkt, duration, ainfo.sample_rate);
109 let pktbuf = pkt.get_buffer();
110 let abuf = NAAudioBuffer::new_from_buf(ainfo, pktbuf, self.chmap.clone());
111 let mut frm = NAFrame::new_from_pkt(pkt, info, NABufferType::AudioPacked(abuf));
112 frm.set_duration(Some(duration));
113 frm.set_keyframe(true);
116 Err(DecoderError::InvalidData)
119 fn flush(&mut self) {
123 #[cfg(feature="decoder_pcm")]
124 impl NAOptionHandler for PCMDecoder {
125 fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
126 fn set_options(&mut self, _options: &[NAOption]) { }
127 fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
130 #[cfg(feature="decoder_pcm")]
131 pub fn get_decoder() -> Box<dyn NADecoder + Send> {
132 Box::new(PCMDecoder::new(PCMMode::Infinity))
135 #[cfg(feature="decoder_pcm")]
136 pub fn get_a_law_decoder() -> Box<dyn NADecoder + Send> {
137 Box::new(PCMDecoder::new(PCMMode::ALaw))
140 #[cfg(feature="decoder_pcm")]
141 pub fn get_mu_law_decoder() -> Box<dyn NADecoder + Send> {
142 Box::new(PCMDecoder::new(PCMMode::MuLaw))
145 #[cfg(feature="encoder_pcm")]
147 stream: Option<NAStreamRef>,
148 pkt: Option<NAPacket>,
151 #[cfg(feature="encoder_pcm")]
161 #[allow(unused_macros)]
162 macro_rules! write_buffer {
163 ($abuf: expr, $dvec: expr, $write_be: ident, $write_le: ident, $dtype: tt) => {
164 let info = $abuf.get_info();
165 let len = $abuf.get_length();
166 let data = $abuf.get_data();
167 let channels = $abuf.get_chmap().num_channels();
168 let stride = $abuf.get_stride();
169 let step = $abuf.get_step();
170 let is_be = info.format.be;
172 $dvec = vec![0u8; len * channels * std::mem::size_of::<$dtype>()];
173 let mut mw = MemoryWriter::new_write($dvec.as_mut_slice());
174 let mut bw = ByteWriter::new(&mut mw);
176 for j in 0..channels {
178 bw.$write_be(data[off * step + j * stride] as $dtype).unwrap();
180 bw.$write_le(data[off * step + j * stride] as $dtype).unwrap();
187 #[cfg(feature="encoder_pcm")]
188 impl NAEncoder for PCMEncoder {
189 fn negotiate_format(&self, encinfo: &EncodeParameters) -> EncoderResult<EncodeParameters> {
190 match encinfo.format {
191 NACodecTypeInfo::None => {
192 let mut ofmt = EncodeParameters::default();
193 ofmt.format = NACodecTypeInfo::Audio(NAAudioInfo::new(0, 0, SND_S16P_FORMAT, 0));
196 NACodecTypeInfo::Video(_) => Err(EncoderError::FormatError),
197 NACodecTypeInfo::Audio(_) => {
202 fn init(&mut self, stream_id: u32, encinfo: EncodeParameters) -> EncoderResult<NAStreamRef> {
203 match encinfo.format {
204 NACodecTypeInfo::None => Err(EncoderError::FormatError),
205 NACodecTypeInfo::Video(_) => Err(EncoderError::FormatError),
206 NACodecTypeInfo::Audio(_) => {
207 let info = NACodecInfo::new("pcm", encinfo.format, None);
208 let mut stream = NAStream::new(StreamType::Audio, stream_id, info, encinfo.tb_num, encinfo.tb_den, 0);
209 stream.set_num(stream_id as usize);
210 let stream = stream.into_ref();
211 self.stream = Some(stream.clone());
216 fn encode(&mut self, frm: &NAFrame) -> EncoderResult<()> {
217 let buf = frm.get_buffer();
220 NABufferType::AudioU8(ref abuf) => {
221 let stride = abuf.get_stride();
222 if stride == 1 { // packed already
223 self.pkt = Some(NAPacket::new_from_refbuf(self.stream.clone().unwrap(), frm.ts, true, abuf.get_data_ref()));
226 let len = abuf.get_length();
227 let data = abuf.get_data();
228 let channels = abuf.get_chmap().num_channels();
229 dbuf = Vec::with_capacity(len * channels);
231 for j in 0..channels {
232 dbuf.push(data[off + j * stride]);
236 NABufferType::AudioI16(ref abuf) => {
237 write_buffer!(abuf, dbuf, write_u16be, write_u16le, u16);
239 NABufferType::AudioI32(ref abuf) => {
240 write_buffer!(abuf, dbuf, write_u32be, write_u32le, u32);
242 NABufferType::AudioF32(ref abuf) => {
243 write_buffer!(abuf, dbuf, write_f32be, write_f32le, f32);
245 NABufferType::AudioPacked(ref abuf) => {
246 self.pkt = Some(NAPacket::new_from_refbuf(self.stream.clone().unwrap(), frm.ts, true, abuf.get_data_ref()));
249 NABufferType::None => {
253 _ => return Err(EncoderError::FormatError),
255 self.pkt = Some(NAPacket::new(self.stream.clone().unwrap(), frm.ts, true, dbuf));
258 fn get_packet(&mut self) -> EncoderResult<Option<NAPacket>> {
260 std::mem::swap(&mut self.pkt, &mut npkt);
263 fn flush(&mut self) -> EncoderResult<()> {
268 #[cfg(feature="encoder_pcm")]
269 impl NAOptionHandler for PCMEncoder {
270 fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
271 fn set_options(&mut self, _options: &[NAOption]) { }
272 fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
275 #[cfg(feature="encoder_pcm")]
276 pub fn get_encoder() -> Box<dyn NAEncoder + Send> {
277 Box::new(PCMEncoder::new())