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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 | #region License/* FNA - XNA4 Reimplementation for Desktop Platforms * Copyright 2009-2016 Ethan Lee and the MonoGame Team * * Released under the Microsoft Public License. * See LICENSE for details. */#endregion#region Using Statementsusing System;using System.IO;using System.Collections.Generic;#endregionnamespace Microsoft.Xna.Framework.Audio{ public sealed class SoundEffect : IDisposable { #region Public Properties public TimeSpan Duration { get { return INTERNAL_buffer.Duration; } } public bool IsDisposed { get; private set; } public string Name { get; set; } #endregion #region Public Static Properties // FIXME: This should affect all sounds! alListener? -flibit private static float INTERNAL_masterVolume = 1.0f; public static float MasterVolume { get { return INTERNAL_masterVolume; } set { INTERNAL_masterVolume = value; } } // FIXME: How does this affect OpenAL? -flibit private static float INTERNAL_distanceScale = 1.0f; public static float DistanceScale { get { return INTERNAL_distanceScale; } set { if (value <= 0.0f) { throw new ArgumentOutOfRangeException("value of DistanceScale"); } INTERNAL_distanceScale = value; } } // FIXME: How does this affect OpenAL? -flibit private static float INTERNAL_dopplerScale = 1.0f; public static float DopplerScale { get { return INTERNAL_dopplerScale; } set { if (value <= 0.0f) { throw new ArgumentOutOfRangeException("value of DopplerScale"); } INTERNAL_dopplerScale = value; } } // FIXME: How does this affect OpenAL? -flibit private static float INTERNAL_speedOfSound = 343.5f; public static float SpeedOfSound { get { return INTERNAL_speedOfSound; } set { INTERNAL_speedOfSound = value; } } #endregion #region Internal Variables internal List<WeakReference> Instances = new List<WeakReference>(); internal IALBuffer INTERNAL_buffer; #endregion #region Public Constructors public SoundEffect( byte[] buffer, int sampleRate, AudioChannels channels ) { INTERNAL_buffer = AudioDevice.GenBuffer( buffer, (uint) sampleRate, (uint) channels, 0, 0, false, 1 ); } public SoundEffect( byte[] buffer, int offset, int count, int sampleRate, AudioChannels channels, int loopStart, int loopLength ) { byte[] sendBuf; if (offset != 0 || count != buffer.Length) { // I kind of hate this. -flibit sendBuf = new byte[count]; Array.Copy(buffer, offset, sendBuf, 0, count); } else { sendBuf = buffer; } INTERNAL_buffer = AudioDevice.GenBuffer( sendBuf, (uint) sampleRate, (uint) channels, (uint) loopStart, (uint) (loopStart + loopLength), false, 1 ); } #endregion #region Internal Constructors internal SoundEffect(Stream s) { INTERNAL_loadAudioStream(s); } internal SoundEffect( string name, byte[] buffer, uint sampleRate, uint channels, uint loopStart, uint loopLength, bool isADPCM, uint formatParameter ) { Name = name; INTERNAL_buffer = AudioDevice.GenBuffer( buffer, sampleRate, channels, loopStart, loopStart + loopLength, isADPCM, formatParameter ); } #endregion #region Destructor ~SoundEffect() { Dispose(); } #endregion #region Public Dispose Method public void Dispose() { if (!IsDisposed) { /* FIXME: Is it ironic that we're generating * garbage with ToArray while cleaning up after * the program's leaks? * -flibit */ foreach (WeakReference instance in Instances.ToArray()) { object target = instance.Target; if (target != null) { (target as IDisposable).Dispose(); } } Instances.Clear(); if (INTERNAL_buffer != null) { AudioDevice.ALDevice.DeleteBuffer(INTERNAL_buffer); } IsDisposed = true; } } #endregion #region Additional SoundEffect/SoundEffectInstance Creation Methods public SoundEffectInstance CreateInstance() { return new SoundEffectInstance(this); } public static SoundEffect FromStream(Stream stream) { return new SoundEffect(stream); } #endregion #region Public Play Methods public bool Play() { // FIXME: Perhaps MasterVolume should be applied to alListener? -flibit return Play(MasterVolume, 0.0f, 0.0f); } public bool Play(float volume, float pitch, float pan) { SoundEffectInstance instance = CreateInstance(); instance.Volume = volume; instance.Pitch = pitch; instance.Pan = pan; instance.Play(); if (instance.State != SoundState.Playing) { // Ran out of AL sources, probably. instance.Dispose(); return false; } AudioDevice.InstancePool.Add(instance); return true; } #endregion #region Private WAV Loading Method private void INTERNAL_loadAudioStream(Stream s) { byte[] data; uint sampleRate = 0; uint numChannels = 0; bool isADPCM = false; uint formatParameter = 0; using (BinaryReader reader = new BinaryReader(s)) { // RIFF Signature string signature = new string(reader.ReadChars(4)); if (signature != "RIFF") { throw new NotSupportedException("Specified stream is not a wave file."); } reader.ReadUInt32(); // Riff Chunk Size string wformat = new string(reader.ReadChars(4)); if (wformat != "WAVE") { throw new NotSupportedException("Specified stream is not a wave file."); } // WAVE Header string format_signature = new string(reader.ReadChars(4)); while (format_signature != "fmt ") { reader.ReadBytes(reader.ReadInt32()); format_signature = new string(reader.ReadChars(4)); } int format_chunk_size = reader.ReadInt32(); // Header Information uint audio_format = reader.ReadUInt16(); // 2 numChannels = reader.ReadUInt16(); // 4 sampleRate = reader.ReadUInt32(); // 8 reader.ReadUInt32(); // 12, Byte Rate ushort blockAlign = reader.ReadUInt16(); // 14, Block Align ushort bitDepth = reader.ReadUInt16(); // 16, Bits Per Sample if (audio_format == 1) { System.Diagnostics.Debug.Assert(bitDepth == 8 || bitDepth == 16); formatParameter = (uint) (bitDepth / 16); // 1 for 16, 0 for 8 } else if (audio_format != 2) { isADPCM = true; formatParameter = (((blockAlign / numChannels) - 6) * 2); } else { throw new NotSupportedException("Wave format is not supported."); } // Reads residual bytes if (format_chunk_size > 16) { reader.ReadBytes(format_chunk_size - 16); } // data Signature string data_signature = new string(reader.ReadChars(4)); while (data_signature.ToLowerInvariant() != "data") { reader.ReadBytes(reader.ReadInt32()); data_signature = new string(reader.ReadChars(4)); } if (data_signature != "data") { throw new NotSupportedException("Specified wave file is not supported."); } int waveDataLength = reader.ReadInt32(); data = reader.ReadBytes(waveDataLength); } INTERNAL_buffer = AudioDevice.GenBuffer( data, sampleRate, numChannels, 0, 0, isADPCM, formatParameter ); } #endregion #region Public Static Methods public static TimeSpan GetSampleDuration( int sizeInBytes, int sampleRate, AudioChannels channels ) { sizeInBytes /= 2; // 16-bit PCM! int ms = (int) ( (sizeInBytes / (int) channels) / (sampleRate / 1000.0f) ); return new TimeSpan(0, 0, 0, 0, ms); } public static int GetSampleSizeInBytes( TimeSpan duration, int sampleRate, AudioChannels channels ) { return (int) ( duration.TotalSeconds * sampleRate * (int) channels * 2 // 16-bit PCM! ); } #endregion }} |
