| 1 | use nihav_core::muxers::*; |
| 2 | |
| 3 | struct FLACMuxer<'a> { |
| 4 | bw: &'a mut ByteWriter<'a>, |
| 5 | maxpkt: usize, |
| 6 | minpkt: usize, |
| 7 | duration: u64, |
| 8 | maxblk: u16, |
| 9 | minblk: u16, |
| 10 | bits: u8, |
| 11 | } |
| 12 | |
| 13 | impl<'a> FLACMuxer<'a> { |
| 14 | fn new(bw: &'a mut ByteWriter<'a>) -> Self { |
| 15 | Self { |
| 16 | bw, |
| 17 | maxpkt: std::usize::MAX, minpkt: 0, |
| 18 | maxblk: std::u16::MAX, minblk: 0, |
| 19 | duration: 0, |
| 20 | bits: 0, |
| 21 | } |
| 22 | } |
| 23 | } |
| 24 | |
| 25 | impl<'a> MuxCore<'a> for FLACMuxer<'a> { |
| 26 | fn create(&mut self, strmgr: &StreamManager) -> MuxerResult<()> { |
| 27 | if strmgr.get_num_streams() == 0 { |
| 28 | return Err(MuxerError::InvalidArgument); |
| 29 | } |
| 30 | let stream = strmgr.get_stream(0).unwrap(); |
| 31 | if let NACodecTypeInfo::Audio(ref ainfo) = stream.get_info().get_properties() { |
| 32 | self.bw.write_buf(b"fLaC")?; |
| 33 | self.bw.write_byte(0x80)?; // last metadata block - streaminfo |
| 34 | self.bw.write_u24be(34)?; // streaminfo size |
| 35 | self.bw.write_u16be(2)?; // minimum block size |
| 36 | self.bw.write_u16be(ainfo.block_len as u16)?; |
| 37 | self.bw.write_u24be(0)?; // minimum frame size |
| 38 | self.bw.write_u24be(0)?; // maximum frame size |
| 39 | |
| 40 | let bits = ainfo.format.bits - 1; |
| 41 | self.bits = bits; |
| 42 | self.bw.write_u24be(ainfo.sample_rate * 16 + u32::from(ainfo.channels - 1) * 2 + u32::from(bits >> 4))?; |
| 43 | self.bw.write_byte(bits << 4)?; |
| 44 | self.bw.write_u32be(0)?;//total samples low 32 bits |
| 45 | self.bw.write_u64be(0)?;self.bw.write_u64be(0)?; //MD5 |
| 46 | |
| 47 | Ok(()) |
| 48 | } else { |
| 49 | Err(MuxerError::InvalidArgument) |
| 50 | } |
| 51 | } |
| 52 | fn mux_frame(&mut self, _strmgr: &StreamManager, pkt: NAPacket) -> MuxerResult<()> { |
| 53 | let pktlen = pkt.get_buffer().len(); |
| 54 | let slen = pkt.ts.duration.unwrap_or(0); |
| 55 | let samples = if slen != 1 { slen } else { u64::from(pkt.ts.tb_den) }; |
| 56 | |
| 57 | self.maxpkt = self.maxpkt.max(pktlen); |
| 58 | self.minpkt = self.minpkt.min(pktlen); |
| 59 | self.maxblk = self.maxblk.max(samples as u16); |
| 60 | self.minblk = self.minblk.min(samples as u16); |
| 61 | self.duration += samples; |
| 62 | |
| 63 | self.bw.write_buf(&pkt.get_buffer())?; |
| 64 | Ok(()) |
| 65 | } |
| 66 | fn flush(&mut self) -> MuxerResult<()> { |
| 67 | Ok(()) |
| 68 | } |
| 69 | fn end(&mut self) -> MuxerResult<()> { |
| 70 | //todo: write MD5 somehow? |
| 71 | self.bw.seek(SeekFrom::Start(8))?; |
| 72 | self.bw.write_u16be(self.minblk)?; |
| 73 | self.bw.write_u16be(self.maxblk)?; |
| 74 | self.bw.write_u24be(self.minpkt as u32)?; |
| 75 | self.bw.write_u24be(self.maxpkt as u32)?; |
| 76 | self.bw.seek(SeekFrom::Current(3))?; |
| 77 | self.bw.write_byte((self.bits << 4) | (((self.duration >> 32) as u8) & 0xF))?; |
| 78 | self.bw.write_u32be(self.duration as u32)?; |
| 79 | Ok(()) |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | impl<'a> NAOptionHandler for FLACMuxer<'a> { |
| 84 | fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] } |
| 85 | fn set_options(&mut self, _options: &[NAOption]) { } |
| 86 | fn query_option_value(&self, _name: &str) -> Option<NAValue> { None } |
| 87 | } |
| 88 | |
| 89 | pub struct FLACMuxerCreator {} |
| 90 | |
| 91 | impl MuxerCreator for FLACMuxerCreator { |
| 92 | fn new_muxer<'a>(&self, bw: &'a mut ByteWriter<'a>) -> Box<dyn MuxCore<'a> + 'a> { |
| 93 | Box::new(FLACMuxer::new(bw)) |
| 94 | } |
| 95 | fn get_name(&self) -> &'static str { "flac" } |
| 96 | fn get_capabilities(&self) -> MuxerCapabilities { MuxerCapabilities::SingleAudio("flac") } |
| 97 | } |
| 98 | |
| 99 | #[cfg(test)] |
| 100 | mod test { |
| 101 | use nihav_core::codecs::*; |
| 102 | use nihav_core::demuxers::*; |
| 103 | use nihav_core::muxers::*; |
| 104 | use nihav_codec_support::test::enc_video::*; |
| 105 | use crate::*; |
| 106 | |
| 107 | #[test] |
| 108 | fn test_flac_muxer() { |
| 109 | let mut dmx_reg = RegisteredDemuxers::new(); |
| 110 | llaudio_register_all_demuxers(&mut dmx_reg); |
| 111 | // sample: https://samples.mplayerhq.hu/A-codecs/lossless/luckynight.flac |
| 112 | let dec_config = DecoderTestParams { |
| 113 | demuxer: "flac", |
| 114 | in_name: "assets/LLaudio/luckynight.flac", |
| 115 | limit: None, |
| 116 | stream_type: StreamType::None, |
| 117 | dmx_reg, dec_reg: RegisteredDecoders::new(), |
| 118 | }; |
| 119 | let mut mux_reg = RegisteredMuxers::new(); |
| 120 | llaudio_register_all_muxers(&mut mux_reg); |
| 121 | /* let enc_config = EncoderTestParams { |
| 122 | muxer: "flac", |
| 123 | enc_name: "", |
| 124 | out_name: "muxed.flac", |
| 125 | mux_reg, enc_reg: RegisteredEncoders::new(), |
| 126 | }; |
| 127 | test_remuxing(&dec_config, &enc_config);*/ |
| 128 | test_remuxing_md5(&dec_config, "flac", &mux_reg, |
| 129 | [0x77afb7c0, 0x84d2bd87, 0x6e028092, 0x7db7c72e]); |
| 130 | } |
| 131 | } |
| 132 | |