sndplay/src/main.rs

   1 extern crate libc;
   2 extern crate sdl2_sys;
   3 extern crate nihav_core;
   4 extern crate nihav_registry;
   5
   6 use std::fs::File;
   7 use std::io::prelude::*;
   8 use std::io::BufReader;
   9 use std::sync::mpsc;
  10 use std::time::Duration;
  11 use std::thread;
  12 use sdl2_sys::{SDL_AudioSpec, Uint32};
  13 use nihav_core::io::byteio::{FileReader, ByteReader};
  14 use nihav_core::frame::*;
  15 use nihav_core::codecs::*;
  16 use nihav_core::demuxers::*;
  17 use nihav_core::soundcvt::*;
  18
  19 mod allreg;
  20 mod command;
  21 use command::*;
  22 mod demux;
  23 use demux::*;
  24
  25 struct Player {
  26     ended:      bool,
  27     full_reg:   allreg::FullRegister,
  28     paused:     bool,
  29     mute:       bool,
  30     volume:     u8,
  31     debug:      bool,
  32     buf:        Vec<i16>,
  33 }
  34
  35 struct AudioDevice {
  36     device_id:  sdl2_sys::SDL_AudioDeviceID
  37 }
  38
  39 impl AudioDevice {
  40     fn open(arate: u32, channels: u8) -> Option<(Self, SDL_AudioSpec)> {
  41         let desired_spec = SDL_AudioSpec {
  42             freq:       arate as i32,
  43             format:     sdl2_sys::AUDIO_S16 as u16,
  44             channels,
  45             silence:    0,
  46             samples:    0,
  47             padding:    0,
  48             size:       0,
  49             callback:   None,
  50             userdata:   std::ptr::null_mut(),
  51         };
  52         let mut dspec = desired_spec;
  53         let device_id = unsafe { sdl2_sys::SDL_OpenAudioDevice(std::ptr::null(), 0, &desired_spec, &mut dspec, 0) };
  54         if device_id != 0 {
  55             Some((AudioDevice { device_id }, dspec))
  56         } else {
  57             None
  58         }
  59     }
  60     fn pause(&self) {
  61         unsafe { sdl2_sys::SDL_PauseAudioDevice(self.device_id, 1); }
  62     }
  63     fn resume(&self) {
  64         unsafe { sdl2_sys::SDL_PauseAudioDevice(self.device_id, 0); }
  65     }
  66     fn clear(&self) {
  67         unsafe { sdl2_sys::SDL_ClearQueuedAudio(self.device_id); }
  68     }
  69     fn queue(&self, buf: &[i16]) {
  70         unsafe {
  71             let len = buf.len() * 2;
  72             let buf_ptr = buf.as_ptr();
  73             sdl2_sys::SDL_QueueAudio(self.device_id, buf_ptr as *const core::ffi::c_void, len as Uint32);
  74         }
  75     }
  76     fn queue_bytes(&self, buf: &[u8]) {
  77         unsafe {
  78             let len = buf.len();
  79             let buf_ptr = buf.as_ptr();
  80             sdl2_sys::SDL_QueueAudio(self.device_id, buf_ptr as *const core::ffi::c_void, len as Uint32);
  81         }
  82     }
  83     fn size(&self) -> u32 {
  84         unsafe { sdl2_sys::SDL_GetQueuedAudioSize(self.device_id) }
  85     }
  86 }
  87
  88 impl Drop for AudioDevice {
  89     fn drop(&mut self) {
  90         unsafe { sdl2_sys::SDL_CloseAudioDevice(self.device_id); }
  91     }
  92 }
  93
  94 struct Decoder<'a> {
  95     demuxer:    DemuxerObject<'a>,
  96     decoder:    Box<dyn NADecoder>,
  97     dsupp:      Box<NADecoderSupport>,
  98     buf:        &'a mut Vec<i16>,
  99     stream_no:  usize,
 100     dst_info:   NAAudioInfo,
 101     dst_chmap:  NAChannelMap,
 102     samplepos:  u64,
 103     arate:      u32,
 104     volume:     u8,
 105     mute:       bool,
 106 }
 107
 108 fn output_vol_i16(device: &AudioDevice, tmp: &mut Vec<i16>, src: &[i16], mute: bool, volume: u8) {
 109     if !mute {
 110         tmp.clear();
 111         tmp.reserve(src.len());
 112         let vol = i32::from(volume);
 113         for &sample in src.iter() {
 114             let nsamp = vol * i32::from(sample) / 100;
 115             tmp.push(nsamp.min(32767).max(-32768) as i16);
 116         }
 117     } else {
 118         tmp.clear();
 119         tmp.resize(src.len(), 0);
 120     }
 121     device.queue(&tmp);
 122 }
 123
 124 fn output_vol_u8(device: &AudioDevice, tmp: &mut Vec<i16>, src: &[u8], mute: bool, volume: u8) {
 125     if !mute {
 126         tmp.clear();
 127         tmp.reserve(src.len());
 128         let vol = i32::from(volume);
 129         for sample in src.chunks_exact(2) {
 130             let sample = (u16::from(sample[0]) + u16::from(sample[1]) * 256) as i16;
 131             let nsamp = vol * i32::from(sample) / 100;
 132             tmp.push(nsamp.min(32767).max(-32768) as i16);
 133         }
 134     } else {
 135         tmp.clear();
 136         tmp.resize(src.len() / 2, 0);
 137     }
 138     device.queue(&tmp);
 139 }
 140
 141 impl<'a> Decoder<'a> {
 142     fn refill(&mut self, device: &AudioDevice) -> bool {
 143         loop {
 144             match self.demuxer.get_frame() {
 145                 Ok(pkt) => {
 146                     if pkt.get_stream().get_num() == self.stream_no {
 147                         match self.decoder.decode(&mut self.dsupp, &pkt) {
 148                             Ok(frm) => {
 149                                 let buf = frm.get_buffer();
 150                                 if let NABufferType::None = buf {
 151                                     return false;
 152                                 }
 153                                 if let Some(pts) = frm.ts.get_pts() {
 154                                     self.samplepos = NATimeInfo::ts_to_time(pts, u64::from(self.arate), frm.ts.tb_num, frm.ts.tb_den);
 155                                 }
 156                                 let out_buf = convert_audio_frame(&buf, &self.dst_info, &self.dst_chmap).unwrap();
 157                                 match out_buf {
 158                                     NABufferType::AudioI16(abuf) => {
 159                                         if !self.mute && self.volume == 100 {
 160                                             device.queue(&abuf.get_data());
 161                                         } else {
 162                                             output_vol_i16(device, self.buf, &abuf.get_data(), self.mute, self.volume);
 163                                         }
 164                                         self.samplepos += abuf.get_length() as u64;
 165                                     },
 166                                     NABufferType::AudioPacked(abuf) => {
 167                                         if !self.mute && self.volume == 100 {
 168                                             device.queue_bytes(&abuf.get_data());
 169                                         } else {
 170                                             output_vol_u8(device, self.buf, &abuf.get_data(), self.mute, self.volume);
 171                                         }
 172                                         self.samplepos += abuf.get_length() as u64;
 173                                     },
 174                                     _ => println!("unknown buffer type"),
 175                                 };
 176                                 return false;
 177                             },
 178                             Err(err) => {
 179                                 println!(" error decoding {:?}", err);
 180                                 return true;
 181                             },
 182                         };
 183                     }
 184                 },
 185                 Err(DemuxerError::EOF) => return true,
 186                 Err(err) => {
 187                     println!("demuxing error {:?}", err);
 188                     return true;
 189                 },
 190             };
 191         }
 192     }
 193     fn seek(&mut self, time: u64) -> bool {
 194         let ret = self.demuxer.seek(NATimePoint::Milliseconds(time));
 195 if ret.is_err() { println!(" seek error\n"); }
 196         ret.is_ok()
 197     }
 198 }
 199
 200 fn format_time(ms: u64) -> String {
 201     let s = ms / 1000;
 202     let ds = (ms % 1000) / 100;
 203     let (min, s) = (s / 60, s % 60);
 204     let (h, min) = (min / 60, min % 60);
 205     if h == 0 {
 206         if min == 0 {
 207             format!("{}.{}", s, ds)
 208         } else {
 209             format!("{}:{:02}.{}", min, s, ds)
 210         }
 211     } else {
 212         format!("{}:{:02}:{:02}.{}", h, min, s, ds)
 213     }
 214 }
 215
 216 impl Player {
 217     fn new() -> Self {
 218         let full_reg = allreg::FullRegister::new();
 219
 220         unsafe {
 221             if sdl2_sys::SDL_Init(sdl2_sys::SDL_INIT_AUDIO) != 0 {
 222                 panic!("cannot init SDL");
 223             }
 224         }
 225
 226         Self {
 227             ended:  false,
 228             paused: false,
 229             full_reg,
 230             volume: 100,
 231             mute:   false,
 232             debug:  false,
 233             buf:    Vec::new(),
 234         }
 235     }
 236     fn play_file(&mut self, name: &str, cmd_receiver: &mpsc::Receiver<Command>, start_time: NATimePoint) {
 237         let ret = File::open(name);
 238         if ret.is_err() {
 239             println!("error opening {}", name);
 240             return;
 241         }
 242         let file = ret.unwrap();
 243         let file = BufReader::new(file);
 244
 245         let mut fr = FileReader::new_read(file);
 246         let mut br = ByteReader::new(&mut fr);
 247         if br.peek_byte().is_err() {
 248             println!("Cannot read {}", name);
 249             return;
 250         }
 251         let (is_raw, start, end) = detect_tags(&mut br);
 252
 253         let mut nfr: Box<dyn ByteIO>;
 254         if start != 0 || end.is_some() {
 255             //println!(" limiting range to {:X}-{:X}", start, end.unwrap_or(0));
 256             let file = fr.finish();
 257             nfr = Box::new(BoundedFileReader::new_read(file, start, end).unwrap());
 258         } else {
 259             nfr = Box::new(fr);
 260         }
 261         let mut br = ByteReader::new(nfr.as_mut());
 262         let dmx = DemuxerObject::create(&mut br, &self.full_reg, name, is_raw);
 263         if dmx.is_none() {
 264             println!("No demuxer found!");
 265             return;
 266         }
 267
 268         let mut ainfo = None;
 269         let mut dec: Option<(Box<NADecoderSupport>, Box<dyn NADecoder>)> = None;
 270         let mut stream_no = 0;
 271         let mut duration = dmx.get_duration();
 272         for i in 0..dmx.get_num_streams() {
 273             let s = dmx.get_stream(i).unwrap();
 274             let info = s.get_info();
 275             if info.is_audio() {
 276                 let decfunc = self.full_reg.dec_reg.find_decoder(info.get_name());
 277                 if decfunc.is_none() {
 278                     println!("no decoder for {}", info.get_name());
 279                     continue;
 280                 }
 281                 let mut decoder = (decfunc.unwrap())();
 282                 let mut dsupp = Box::new(NADecoderSupport::new());
 283                 if decoder.init(&mut dsupp, info.clone()).is_err() {
 284                     println!("cannot init decoder for stream {}", i);
 285                     continue;
 286                 }
 287                 dec = Some((dsupp, decoder));
 288                 ainfo = Some(info);
 289                 stream_no = i;
 290                 if s.duration > 0 {
 291                     duration = NATimeInfo::ts_to_time(s.duration, 1000, s.tb_num, s.tb_den);
 292                 }
 293                 break;
 294             }
 295         }
 296         if dec.is_none() {
 297             println!("no audio decoder found");
 298             return;
 299         }
 300         let (dsupp, decoder) = dec.unwrap();
 301
 302         let ainfo = ainfo.unwrap().get_properties().get_audio_info().unwrap();
 303         let arate = if ainfo.sample_rate > 0 { ainfo.sample_rate } else { 44100 };
 304         let ch    = ainfo.channels;
 305
 306         println!("Playing {} [{}Hz {}ch]", name, arate, ch);
 307         let ret = AudioDevice::open(arate, ch.min(2));
 308         if ret.is_none() {
 309             println!("cannot open output");
 310             return;
 311         }
 312         let (device, dspec) = ret.unwrap();
 313         let block_limit = dmx.get_stream(stream_no).unwrap().tb_num * arate / dmx.get_stream(stream_no).unwrap().tb_den * u32::from(dspec.channels);
 314
 315         let dst_info = NAAudioInfo { sample_rate: dspec.freq as u32, channels: dspec.channels, format: SND_S16_FORMAT, block_len: 1 };
 316         let dst_chmap = if dst_info.channels == 2 {
 317                 NAChannelMap::from_str("L,R").unwrap()
 318             } else {
 319                 NAChannelMap::from_str("C").unwrap()
 320             };
 321         let mut decoder = Decoder {
 322                 demuxer:    dmx,
 323                 decoder, dsupp,
 324                 stream_no,
 325                 dst_info, dst_chmap,
 326                 samplepos: 0,
 327                 arate,
 328                 volume: self.volume,
 329                 mute:   self.mute,
 330                 buf:    &mut self.buf,
 331             };
 332         let mut refill_limit = arate * u32::from(dspec.channels);
 333         let underfill_limit = (arate * u32::from(dspec.channels) / 4).max(block_limit);
 334
 335         if start_time != NATimePoint::None {
 336             let _ret = decoder.demuxer.seek(start_time);
 337         }
 338
 339         let mut eof = decoder.refill(&device);
 340         while !eof && device.size() < refill_limit {
 341             eof = decoder.refill(&device);
 342         }
 343
 344         let duration_str = if duration != 0 { format_time(duration) } else { "???".to_owned() };
 345         if !self.paused {
 346             device.resume();
 347         }
 348         let mut no_display = false;
 349         'main: loop {
 350             let cur_time = decoder.samplepos.saturating_sub(u64::from(device.size() / 2 / u32::from(dst_info.channels)));
 351             let full_ms = cur_time * 1000 / u64::from(arate);
 352             let timestr = format_time(full_ms);
 353             let disp_vol = if self.mute { 0 } else { self.volume };
 354             if !no_display {
 355                 if !self.debug {
 356                     print!("> {} / {}   {}%       \r", timestr, duration_str, disp_vol);
 357                 } else {
 358                     print!("> {} / {}   |{}| {}%       \r", timestr, duration_str, device.size(), disp_vol);
 359                 }
 360             }
 361             std::io::stdout().flush().unwrap();
 362             if device.size() < underfill_limit && !self.paused && refill_limit < (1 << 20) {
 363                 if full_ms > 5000 {
 364                     println!("underrun!");
 365                 }
 366                 refill_limit += refill_limit >> 1;
 367             }
 368             if device.size() < refill_limit / 2 {
 369                 while !eof && device.size() < refill_limit {
 370                     eof = decoder.refill(&device);
 371                 }
 372             }
 373             if eof && device.size() == 0 {
 374                 break 'main;
 375             }
 376             while let Ok(cmd) = cmd_receiver.try_recv() {
 377                 let cur_time = decoder.samplepos.saturating_sub(u64::from(device.size() / 2 / u32::from(dst_info.channels)));
 378                 match cmd {
 379                     Command::Forward(val) => {
 380                         device.pause();
 381                         device.clear();
 382                         let seekoff = match val {
 383                                 1 => 10,
 384                                 2 => 60,
 385                                 _ => 10 * 60,
 386                             };
 387                         let seek_time = cur_time * 1000 / u64::from(arate) + seekoff * 1000;
 388                         let _ret = decoder.seek(seek_time);
 389                         while !eof && device.size() < refill_limit {
 390                             eof = decoder.refill(&device);
 391                         }
 392                         if eof {
 393                             break 'main;
 394                         }
 395                         if !self.paused {
 396                             device.resume();
 397                         }
 398                     },
 399                     Command::Back(val) => {
 400                         device.pause();
 401                         device.clear();
 402                         let seekoff = match val {
 403                                 1 => 10,
 404                                 2 => 60,
 405                                 _ => 10 * 60,
 406                             };
 407                         let seek_time = (cur_time * 1000 / u64::from(arate)).saturating_sub(seekoff * 1000);
 408                         let _ret = decoder.seek(seek_time);
 409                         while !eof && device.size() < refill_limit {
 410                             eof = decoder.refill(&device);
 411                         }
 412                         if eof {
 413                             break 'main;
 414                         }
 415                         if !self.paused {
 416                             device.resume();
 417                         }
 418                     },
 419                     Command::Seek(seek_time) => {
 420                         device.pause();
 421                         device.clear();
 422                         let _ret = decoder.seek(seek_time);
 423                         while !eof && device.size() < refill_limit {
 424                             eof = decoder.refill(&device);
 425                         }
 426                         if eof {
 427                             break 'main;
 428                         }
 429                         if !self.paused {
 430                             device.resume();
 431                         }
 432                     },
 433                     Command::Quit => {
 434                         device.pause();
 435                         self.ended = true;
 436                         break 'main;
 437                     },
 438                     Command::Next => {
 439                         device.pause();
 440                         break 'main;
 441                     },
 442                     Command::Repeat => {
 443                         device.pause();
 444                         device.clear();
 445                         let _ret = decoder.seek(0);
 446                         while !eof && device.size() < refill_limit {
 447                             eof = decoder.refill(&device);
 448                         }
 449                         if eof {
 450                             break 'main;
 451                         }
 452                         if !self.paused {
 453                             device.resume();
 454                         }
 455                     },
 456                     Command::Pause => {
 457                         self.paused = !self.paused;
 458                         if self.paused {
 459                             device.pause();
 460                         } else {
 461                             device.resume();
 462                         }
 463                     },
 464                     Command::VolumeUp => {
 465                         self.volume = (self.volume + 10).min(200);
 466                         decoder.volume = self.volume;
 467                     },
 468                     Command::VolumeDown => {
 469                         self.volume = self.volume.saturating_sub(10);
 470                         decoder.volume = self.volume;
 471                     },
 472                     Command::Mute => {
 473                         self.mute = !self.mute;
 474                         decoder.mute = self.mute;
 475                     },
 476                     Command::Debug => {
 477                         self.debug = !self.debug;
 478                     },
 479                     Command::PauseDisplay  => {
 480                         no_display = true;
 481                         if !self.paused {
 482                             device.pause();
 483                         }
 484                     },
 485                     Command::ResumeDisplay => {
 486                         no_display = false;
 487                         if !self.paused {
 488                             device.resume();
 489                         }
 490                     },
 491                 };
 492                 if !no_display {
 493                     print!("\r{:60}\r", ' ');
 494                 }
 495             }
 496             thread::sleep(Duration::from_millis(200));
 497         }
 498
 499         println!();
 500     }
 501 }
 502
 503 fn main() {
 504     let args: Vec<String> = std::env::args().collect();
 505
 506     let cmd_state = CmdLineState::new();
 507
 508     let (cmd_reader_thread, cmd_receiver) = start_reader();
 509     let mut player = Player::new();
 510
 511     if args.len() == 1 {
 512         println!("usage: nihav-sndplay file1 file2 ...");
 513         return;
 514     }
 515
 516     if args[1] == "--help" {
 517         println!("usage: nihav-sndplay file1 file2 ...");
 518         println!("commands:");
 519         println!("  escape / q      - quit");
 520         println!("  space           - pause / resume playback");
 521         println!("  enter / end     - play next file");
 522         println!("  home            - play current track from the beginning");
 523         println!("  left / right    - seek 10 seconds forward / back");
 524         println!("  up / down       - seek 1 minute forward / back");
 525         println!("  pgup / pgdn     - seek 10 minutes forward / back");
 526         println!("  + / -           - increase / decrease volume");
 527         println!("  m               - mute output");
 528         return;
 529     }
 530
 531     let mut aiter = args[1..].iter();
 532     let mut start_time = NATimePoint::None;
 533     while let Some(arg) = aiter.next() {
 534         match arg.as_str() {
 535             "-start" => {
 536                 if let Some(arg) = aiter.next() {
 537                     if let Ok(val) = arg.parse() {
 538                         start_time = val;
 539                     } else {
 540                         println!("invalid time");
 541                     }
 542                 } else {
 543                     println!("argument is required");
 544                 }
 545             },
 546             _ => {
 547                 player.play_file(arg, &cmd_receiver, start_time);
 548                 if player.ended {
 549                     break;
 550                 }
 551                 start_time = NATimePoint::None;
 552             },
 553         };
 554     }
 555     cmd_state.restore();
 556
 557     drop(cmd_reader_thread);
 558     unsafe { sdl2_sys::SDL_Quit(); }
 559 }