sndplay/src/main.rs

   1 extern crate libc;
   2 extern crate sdl2_sys;
   3 extern crate nihav_core;
   4 extern crate nihav_registry;
   5 extern crate nihav_allstuff;
   6
   7 use std::fs::File;
   8 use std::io::prelude::*;
   9 use std::io::{BufReader, SeekFrom};
  10 use std::sync::mpsc;
  11 use std::time::Duration;
  12 use std::thread;
  13 use sdl2_sys::{SDL_AudioSpec, Uint32};
  14 use nihav_core::io::byteio::{FileReader, ByteReader};
  15 use nihav_core::frame::*;
  16 use nihav_core::codecs::*;
  17 use nihav_core::demuxers::*;
  18 use nihav_core::soundcvt::*;
  19 use nihav_registry::detect;
  20 use nihav_allstuff::*;
  21
  22 mod command;
  23 use command::*;
  24
  25 struct Player {
  26     ended:      bool,
  27     dmx_reg:    RegisteredDemuxers,
  28     dec_reg:    RegisteredDecoders,
  29     paused:     bool,
  30     mute:       bool,
  31     volume:     u8,
  32     debug:      bool,
  33     buf:        Vec<i16>,
  34 }
  35
  36 struct AudioDevice {
  37     device_id:  sdl2_sys::SDL_AudioDeviceID
  38 }
  39
  40 impl AudioDevice {
  41     fn open(arate: u32, channels: u8) -> Option<(Self, SDL_AudioSpec)> {
  42         let desired_spec = SDL_AudioSpec {
  43             freq:       arate as i32,
  44             format:     sdl2_sys::AUDIO_S16 as u16,
  45             channels,
  46             silence:    0,
  47             samples:    0,
  48             padding:    0,
  49             size:       0,
  50             callback:   None,
  51             userdata:   std::ptr::null_mut(),
  52         };
  53         let mut dspec = desired_spec;
  54         let device_id = unsafe { sdl2_sys::SDL_OpenAudioDevice(std::ptr::null(), 0, &desired_spec, &mut dspec, 0) };
  55         if device_id != 0 {
  56             Some((AudioDevice { device_id }, dspec))
  57         } else {
  58             None
  59         }
  60     }
  61     fn pause(&self) {
  62         unsafe { sdl2_sys::SDL_PauseAudioDevice(self.device_id, 1); }
  63     }
  64     fn resume(&self) {
  65         unsafe { sdl2_sys::SDL_PauseAudioDevice(self.device_id, 0); }
  66     }
  67     fn clear(&self) {
  68         unsafe { sdl2_sys::SDL_ClearQueuedAudio(self.device_id); }
  69     }
  70     fn queue(&self, buf: &[i16]) {
  71         unsafe {
  72             let len = buf.len() * 2;
  73             let buf_ptr = buf.as_ptr();
  74             sdl2_sys::SDL_QueueAudio(self.device_id, buf_ptr as *const core::ffi::c_void, len as Uint32);
  75         }
  76     }
  77     fn queue_bytes(&self, buf: &[u8]) {
  78         unsafe {
  79             let len = buf.len();
  80             let buf_ptr = buf.as_ptr();
  81             sdl2_sys::SDL_QueueAudio(self.device_id, buf_ptr as *const core::ffi::c_void, len as Uint32);
  82         }
  83     }
  84     fn size(&self) -> u32 {
  85         unsafe { sdl2_sys::SDL_GetQueuedAudioSize(self.device_id) }
  86     }
  87 }
  88
  89 struct Decoder<'a> {
  90     demuxer:    Demuxer<'a>,
  91     decoder:    Box<dyn NADecoder>,
  92     dsupp:      Box<NADecoderSupport>,
  93     buf:        &'a mut Vec<i16>,
  94     stream_no:  usize,
  95     dst_info:   NAAudioInfo,
  96     dst_chmap:  NAChannelMap,
  97     samplepos:  u64,
  98     arate:      u32,
  99     volume:     u8,
 100     mute:       bool,
 101 }
 102
 103 fn output_vol_i16(device: &AudioDevice, tmp: &mut Vec<i16>, src: &[i16], mute: bool, volume: u8) {
 104     if !mute {
 105         tmp.truncate(0);
 106         tmp.reserve(src.len());
 107         let vol = i32::from(volume);
 108         for &sample in src.iter() {
 109             let nsamp = vol * i32::from(sample) / 100;
 110             tmp.push(nsamp.min(32767).max(-32768) as i16);
 111         }
 112     } else {
 113         tmp.truncate(0);
 114         tmp.resize(src.len(), 0);
 115     }
 116     device.queue(&tmp);
 117 }
 118
 119 fn output_vol_u8(device: &AudioDevice, tmp: &mut Vec<i16>, src: &[u8], mute: bool, volume: u8) {
 120     if !mute {
 121         tmp.truncate(0);
 122         tmp.reserve(src.len());
 123         let vol = i32::from(volume);
 124         for sample in src.chunks_exact(2) {
 125             let sample = (u16::from(sample[0]) + u16::from(sample[1]) * 256) as i16;
 126             let nsamp = vol * i32::from(sample) / 100;
 127             tmp.push(nsamp.min(32767).max(-32768) as i16);
 128         }
 129     } else {
 130         tmp.truncate(0);
 131         tmp.resize(src.len() / 2, 0);
 132     }
 133     device.queue(&tmp);
 134 }
 135
 136 impl<'a> Decoder<'a> {
 137     fn refill(&mut self, device: &AudioDevice) -> bool {
 138         loop {
 139             match self.demuxer.get_frame() {
 140                 Ok(pkt) => {
 141                     if pkt.get_stream().get_num() == self.stream_no {
 142                         match self.decoder.decode(&mut self.dsupp, &pkt) {
 143                             Ok(frm) => {
 144                                 let buf = frm.get_buffer();
 145                                 if let Some(pts) = frm.ts.get_pts() {
 146                                     self.samplepos = NATimeInfo::ts_to_time(pts, u64::from(self.arate), frm.ts.tb_num, frm.ts.tb_den);
 147                                 }
 148                                 let out_buf = convert_audio_frame(&buf, &self.dst_info, &self.dst_chmap).unwrap();
 149                                 match out_buf {
 150                                     NABufferType::AudioI16(abuf) => {
 151                                         if !self.mute && self.volume == 100 {
 152                                             device.queue(&abuf.get_data());
 153                                         } else {
 154                                             output_vol_i16(device, self.buf, &abuf.get_data(), self.mute, self.volume);
 155                                         }
 156                                         self.samplepos += abuf.get_length() as u64;
 157                                     },
 158                                     NABufferType::AudioPacked(abuf) => {
 159                                         if !self.mute && self.volume == 100 {
 160                                             device.queue_bytes(&abuf.get_data());
 161                                         } else {
 162                                             output_vol_u8(device, self.buf, &abuf.get_data(), self.mute, self.volume);
 163                                         }
 164                                         self.samplepos += abuf.get_length() as u64;
 165                                     },
 166                                     _ => println!("unknown buffer type"),
 167                                 };
 168                                 return false;
 169                             },
 170                             Err(err) => {
 171                                 println!(" error decoding {:?}", err);
 172                                 return true;
 173                             },
 174                         };
 175                     }
 176                 },
 177                 Err(DemuxerError::EOF) => return true,
 178                 Err(err) => {
 179                     println!("demuxing error {:?}", err);
 180                     return true;
 181                 },
 182             };
 183         }
 184     }
 185     fn seek(&mut self, time: u64) -> bool {
 186         let ret = self.demuxer.seek(NATimePoint::Milliseconds(time));
 187 if ret.is_err() { println!(" seek error\n"); }
 188         ret.is_ok()
 189     }
 190 }
 191
 192 fn format_time(ms: u64) -> String {
 193     let s = ms / 1000;
 194     let ds = (ms % 1000) / 100;
 195     let (min, s) = (s / 60, s % 60);
 196     if min == 0 {
 197         format!("{}.{}", s, ds)
 198     } else {
 199         format!("{}:{:02}.{}", min, s, ds)
 200     }
 201 }
 202
 203 impl Player {
 204     fn new() -> Self {
 205         let mut dmx_reg = RegisteredDemuxers::new();
 206         nihav_register_all_demuxers(&mut dmx_reg);
 207         let mut dec_reg = RegisteredDecoders::new();
 208         nihav_register_all_decoders(&mut dec_reg);
 209
 210         unsafe {
 211             if sdl2_sys::SDL_Init(sdl2_sys::SDL_INIT_AUDIO) != 0 {
 212                 panic!("cannot init SDL");
 213             }
 214         }
 215
 216         Self {
 217             ended:  false,
 218             paused: false,
 219             dmx_reg, dec_reg,
 220             volume: 100,
 221             mute:   false,
 222             debug:  false,
 223             buf:    Vec::new(),
 224         }
 225     }
 226     fn play_file(&mut self, name: &str, cmd_receiver: &mpsc::Receiver<Command>) {
 227         let ret = File::open(name);
 228         if ret.is_err() {
 229             println!("error opening {}", name);
 230             return;
 231         }
 232         let mut file = ret.unwrap();
 233
 234         let mut fr = FileReader::new_read(&mut file);
 235         let mut br = ByteReader::new(&mut fr);
 236         let res = detect::detect_format(name, &mut br);
 237         if res.is_none() {
 238             println!("cannot detect format for {}", name);
 239             return;
 240         }
 241         let (dmx_name, _) = res.unwrap();
 242         drop(br);
 243         drop(fr);
 244         let dmx_fact = self.dmx_reg.find_demuxer(dmx_name);
 245         if dmx_fact.is_none() {
 246             println!("no demuxer for format {}", dmx_name);
 247             return;
 248         }
 249         let dmx_fact = dmx_fact.unwrap();
 250
 251         file.seek(SeekFrom::Start(0)).unwrap();
 252         let mut file = BufReader::new(file);
 253         let mut fr = FileReader::new_read(&mut file);
 254         let mut br = ByteReader::new(&mut fr);
 255         let res = create_demuxer(dmx_fact, &mut br);
 256         if res.is_err() {
 257             println!("cannot create demuxer");
 258             return;
 259         }
 260         let dmx = res.unwrap();
 261
 262         let mut ainfo = None;
 263         let mut dec: Option<(Box<NADecoderSupport>, Box<dyn NADecoder>)> = None;
 264         let mut stream_no = 0;
 265         let mut duration = dmx.get_duration();
 266         for i in 0..dmx.get_num_streams() {
 267             let s = dmx.get_stream(i).unwrap();
 268             let info = s.get_info();
 269             if info.is_audio() {
 270                 let decfunc = self.dec_reg.find_decoder(info.get_name());
 271                 if decfunc.is_none() {
 272                     println!("no decoder for {}", info.get_name());
 273                     continue;
 274                 }
 275                 let mut decoder = (decfunc.unwrap())();
 276                 let mut dsupp = Box::new(NADecoderSupport::new());
 277                 if decoder.init(&mut dsupp, info.clone()).is_err() {
 278                     println!("cannot init decoder for stream {}", i);
 279                     continue;
 280                 }
 281                 dec = Some((dsupp, decoder));
 282                 ainfo = Some(info);
 283                 stream_no = i;
 284                 if s.duration > 0 {
 285                     duration = NATimeInfo::ts_to_time(s.duration, 1000, s.tb_num, s.tb_den);
 286                 }
 287                 break;
 288             }
 289         }
 290         if dec.is_none() {
 291             println!("no audio decoder found");
 292             return;
 293         }
 294         let (dsupp, decoder) = dec.unwrap();
 295
 296         let ainfo = ainfo.unwrap().get_properties().get_audio_info().unwrap();
 297         let arate = if ainfo.sample_rate > 0 { ainfo.sample_rate } else { 44100 };
 298         let ch    = ainfo.channels;
 299
 300         println!("Playing {} [{}Hz {}ch]", name, arate, ch);
 301         let ret = AudioDevice::open(arate, ch.max(2));
 302         if ret.is_none() {
 303             println!("cannot open output");
 304             return;
 305         }
 306         let (device, dspec) = ret.unwrap();
 307         let block_limit = dmx.get_stream(stream_no).unwrap().tb_num * arate / dmx.get_stream(stream_no).unwrap().tb_den * u32::from(dspec.channels);
 308
 309         let dst_info = NAAudioInfo { sample_rate: dspec.freq as u32, channels: dspec.channels, format: SND_S16_FORMAT, block_len: 1 };
 310         let dst_chmap = if dst_info.channels == 2 {
 311                 NAChannelMap::from_str("L,R").unwrap()
 312             } else {
 313                 NAChannelMap::from_str("C").unwrap()
 314             };
 315         let mut decoder = Decoder {
 316                 demuxer:    dmx,
 317                 decoder, dsupp,
 318                 stream_no,
 319                 dst_info, dst_chmap,
 320                 samplepos: 0,
 321                 arate,
 322                 volume: self.volume,
 323                 mute:   self.mute,
 324                 buf:    &mut self.buf,
 325             };
 326         let mut refill_limit = arate * u32::from(dspec.channels);
 327         let underfill_limit = (arate * u32::from(dspec.channels) / 4).max(block_limit);
 328
 329         let mut eof = decoder.refill(&device);
 330         while !eof && device.size() < refill_limit {
 331             eof = decoder.refill(&device);
 332         }
 333
 334         let duration_str = if duration != 0 { format_time(duration) } else { "???".to_owned() };
 335         if !self.paused {
 336             device.resume();
 337         }
 338         'main: loop {
 339             let cur_time = decoder.samplepos.saturating_sub(u64::from(device.size() / 2 / u32::from(dst_info.channels)));
 340             let full_ms = cur_time * 1000 / u64::from(arate);
 341             let timestr = format_time(full_ms);
 342             let disp_vol = if self.mute { 0 } else { self.volume };
 343             if !self.debug {
 344                 print!("> {} / {}   {}%       \r", timestr, duration_str, disp_vol);
 345             } else {
 346                 print!("> {} / {}   |{}| {}%       \r", timestr, duration_str, device.size(), disp_vol);
 347             }
 348             std::io::stdout().flush().unwrap();
 349             if device.size() < underfill_limit && !self.paused && refill_limit < (1 << 20) {
 350                 if full_ms > 5000 {
 351                     println!("underrun!");
 352                 }
 353                 refill_limit += refill_limit >> 1;
 354             }
 355             if device.size() < refill_limit / 2 {
 356                 while !eof && device.size() < refill_limit {
 357                     eof = decoder.refill(&device);
 358                 }
 359             }
 360             if eof && device.size() == 0 {
 361                 break 'main;
 362             }
 363             while let Ok(cmd) = cmd_receiver.try_recv() {
 364                 let cur_time = decoder.samplepos.saturating_sub(u64::from(device.size() / 2 / u32::from(dst_info.channels)));
 365                 match cmd {
 366                     Command::Forward(val) => {
 367                         device.pause();
 368                         device.clear();
 369                         let seekoff = match val {
 370                                 1 => 10,
 371                                 2 => 60,
 372                                 _ => 10 * 60,
 373                             };
 374                         let seek_time = cur_time * 1000 / u64::from(arate) + seekoff * 1000;
 375                         let _ret = decoder.seek(seek_time);
 376                         while !eof && device.size() < refill_limit {
 377                             eof = decoder.refill(&device);
 378                         }
 379                         if eof {
 380                             break 'main;
 381                         }
 382                         if !self.paused {
 383                             device.resume();
 384                         }
 385                     },
 386                     Command::Back(val) => {
 387                         device.pause();
 388                         device.clear();
 389                         let seekoff = match val {
 390                                 1 => 10,
 391                                 2 => 60,
 392                                 _ => 10 * 60,
 393                             };
 394                         let seek_time = (cur_time * 1000 / u64::from(arate)).saturating_sub(seekoff * 1000);
 395                         let _ret = decoder.seek(seek_time);
 396                         while !eof && device.size() < refill_limit {
 397                             eof = decoder.refill(&device);
 398                         }
 399                         if eof {
 400                             break 'main;
 401                         }
 402                         if !self.paused {
 403                             device.resume();
 404                         }
 405                     },
 406                     Command::Quit => {
 407                         device.pause();
 408                         self.ended = true;
 409                         break 'main;
 410                     },
 411                     Command::Next => {
 412                         device.pause();
 413                         break 'main;
 414                     },
 415                     Command::Repeat => {
 416                         device.pause();
 417                         device.clear();
 418                         let _ret = decoder.seek(0);
 419                         while !eof && device.size() < refill_limit {
 420                             eof = decoder.refill(&device);
 421                         }
 422                         if eof {
 423                             break 'main;
 424                         }
 425                         if !self.paused {
 426                             device.resume();
 427                         }
 428                     },
 429                     Command::Pause => {
 430                         self.paused = !self.paused;
 431                         if self.paused {
 432                             device.pause();
 433                         } else {
 434                             device.resume();
 435                         }
 436                     },
 437                     Command::VolumeUp => {
 438                         self.volume = (self.volume + 10).min(200);
 439                         decoder.volume = self.volume;
 440                     },
 441                     Command::VolumeDown => {
 442                         self.volume = self.volume.saturating_sub(10);
 443                         decoder.volume = self.volume;
 444                     },
 445                     Command::Mute => {
 446                         self.mute = !self.mute;
 447                         decoder.mute = self.mute;
 448                     },
 449                     Command::Debug => {
 450                         self.debug = !self.debug;
 451                     },
 452                 };
 453                 print!("\r{:60}\r", ' ');
 454             }
 455             thread::sleep(Duration::from_millis(200));
 456         }
 457
 458         println!();
 459     }
 460 }
 461
 462 fn main() {
 463     let args: Vec<String> = std::env::args().collect();
 464
 465     let cmd_state = CmdLineState::new();
 466
 467     let (cmd_reader_thread, cmd_receiver) = start_reader();
 468     let mut player = Player::new();
 469
 470     if args.len() == 1 {
 471         println!("usage: nihav-sndplay file1 file2 ...");
 472         return;
 473     }
 474
 475     if args[1] == "--help" {
 476         println!("usage: nihav-sndplay file1 file2 ...");
 477         println!("commands:");
 478         println!("  escape / q      - quit");
 479         println!("  space           - pause / resume playback");
 480         println!("  enter / end     - play next file");
 481         println!("  home            - play current track from the beginning");
 482         println!("  left / right    - seek 10 seconds forward / back");
 483         println!("  up / down       - seek 1 minute forward / back");
 484         println!("  pgup / pgdn     - seek 10 minutes forward / back");
 485         println!("  + / -           - increase / decrease volume");
 486         println!("  m               - mute output");
 487         return;
 488     }
 489
 490     for arg in args[1..].iter() {
 491         player.play_file(arg, &cmd_receiver);
 492         if player.ended {
 493             break;
 494         }
 495     }
 496     cmd_state.restore();
 497
 498     drop(cmd_reader_thread);
 499     unsafe { sdl2_sys::SDL_Quit(); }
 500 }