widget/src/qt/nsSound.cpp

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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  38
  39 #include <string.h>
  40
  41 #include "nscore.h"
  42 #include "plstr.h"
  43 #include "prlink.h"
  44
  45 #include "nsSound.h"
  46 #include "nsString.h"
  47
  48 #include "nsIURL.h"
  49 #include "nsIFileURL.h"
  50 #include "nsNetUtil.h"
  51 #include "nsCOMPtr.h"
  52 #include "nsNativeCharsetUtils.h"
  53 #include "nsAutoPtr.h"
  54
  55 #include <QApplication>
  56 #include <QSound>
  57
  58 /* used with esd_open_sound */
  59 static int esdref = -1;
  60 static PRLibrary *elib = nsnull;
  61
  62 // the following from esd.h
  63
  64 #define ESD_BITS8  (0x0000)
  65 #define ESD_BITS16 (0x0001)
  66 #define ESD_MONO (0x0010)
  67 #define ESD_STEREO (0x0020)
  68 #define ESD_STREAM (0x0000)
  69 #define ESD_PLAY (0x1000)
  70
  71 #define WAV_MIN_LENGTH 44
  72
  73 typedef int (*EsdOpenSoundType)(const char *host);
  74 typedef int (*EsdCloseType)(int);
  75
  76 /* used to play the sounds from the find symbol call */
  77 typedef int  (*EsdPlayStreamType) (int, int, const char *, const char *);
  78 typedef int  (*EsdAudioOpenType)  (void);
  79 typedef int  (*EsdAudioWriteType) (const void *, int);
  80 typedef void (*EsdAudioCloseType) (void);
  81
  82 NS_IMPL_ISUPPORTS2(nsSound, nsISound, nsIStreamLoaderObserver)
  83
  84 nsSound::nsSound()
  85  : mInited( PR_FALSE )
  86 {
  87 }
  88
  89 nsSound::~nsSound()
  90 {
  91     /* see above comment */
  92     if (esdref != -1) {
  93         EsdCloseType EsdClose = (EsdCloseType) PR_FindFunctionSymbol(elib, "esd_close");
  94         if (EsdClose)
  95             (*EsdClose)(esdref);
  96         esdref = -1;
  97     }
  98 }
  99
 100
 101 /**
 102 * unload esd library
 103 */
 104 void
 105 nsSound::Shutdown()
 106 {
 107     if (elib) {
 108         PR_UnloadLibrary(elib);
 109         elib = nsnull;
 110     }
 111 }
 112
 113 NS_IMETHODIMP
 114 nsSound::Init()
 115 {
 116     /* we don't need to do esd_open_sound if we are only going to play files
 117        but we will if we want to do things like streams, etc
 118     */
 119     if (mInited)
 120         return NS_OK;
 121     if (elib)
 122         return NS_OK;
 123
 124     EsdOpenSoundType EsdOpenSound;
 125
 126     elib = PR_LoadLibrary("libesd.so.0");
 127     if (!elib) return NS_ERROR_FAILURE;
 128
 129     EsdOpenSound = (EsdOpenSoundType) PR_FindFunctionSymbol(elib, "esd_open_sound");
 130
 131     if (!EsdOpenSound)
 132         return NS_ERROR_FAILURE;
 133
 134     esdref = (*EsdOpenSound)("localhost");
 135
 136     if (!esdref)
 137         return NS_ERROR_FAILURE;
 138
 139     mInited = PR_TRUE;
 140
 141     return NS_OK;
 142 }
 143
 144 NS_METHOD nsSound::Beep()
 145 {
 146     QApplication::beep();
 147     return NS_OK;
 148 }
 149
 150
 151 /**
 152 * This can't be implemented directly with QT.
 153 * (We can use QSound to play local files but that was not enough.
 154 * Also support of media formats is limited)
 155 *
 156 * Current implementation is copied from GTK side and implementation uses ESD interface.
 157 *
 158 * If we have Qtopia then we can drop ESD implementation and use Qtopia "Multimedia API"
 159 */
 160 NS_IMETHODIMP nsSound::OnStreamComplete(nsIStreamLoader *aLoader,
 161                                         nsISupports *context,
 162                                         nsresult aStatus,
 163                                         PRUint32 dataLen,
 164                                         const PRUint8 *data)
 165 {
 166
 167 #define GET_WORD(s, i) (s[i+1] << 8) | s[i]
 168 #define GET_DWORD(s, i) (s[i+3] << 24) | (s[i+2] << 16) | (s[i+1] << 8) | s[i]
 169
 170     // print a load error on bad status, and return
 171     if (NS_FAILED(aStatus)) {
 172 #ifdef DEBUG
 173         if (aLoader) {
 174             nsCOMPtr<nsIRequest> request;
 175             aLoader->GetRequest(getter_AddRefs(request));
 176             if (request) {
 177                 nsCOMPtr<nsIURI> uri;
 178                 nsCOMPtr<nsIChannel> channel = do_QueryInterface(request);
 179                 if (channel) {
 180                       channel->GetURI(getter_AddRefs(uri));
 181                       if (uri) {
 182                             nsCAutoString uriSpec;
 183                             uri->GetSpec(uriSpec);
 184                             printf("Failed to load %s\n", uriSpec.get());
 185                       }
 186                 }
 187             }
 188         }
 189 #endif
 190         return aStatus;
 191     }
 192
 193     int fd, mask = 0;
 194     PRUint32 samples_per_sec = 0, avg_bytes_per_sec = 0, chunk_len = 0;
 195     PRUint16 format, channels = 1, bits_per_sample = 0;
 196     const PRUint8 *audio = nsnull;
 197     size_t audio_len = 0;
 198
 199     if (dataLen < 4) {
 200         NS_WARNING("Sound stream too short to determine its type");
 201         return NS_ERROR_FAILURE;
 202     }
 203
 204     if (memcmp(data, "RIFF", 4)) {
 205 #ifdef DEBUG
 206         printf("We only support WAV files currently.\n");
 207 #endif
 208         return NS_ERROR_FAILURE;
 209     }
 210
 211     if (dataLen <= WAV_MIN_LENGTH) {
 212         NS_WARNING("WAV files should be longer than 44 bytes.");
 213         return NS_ERROR_FAILURE;
 214     }
 215
 216     PRUint32 i = 12;
 217     while (i + 7 < dataLen) {
 218         if (!memcmp(data + i, "fmt ", 4) && !chunk_len) {
 219             i += 4;
 220
 221             /* length of the rest of this subblock (should be 16 for PCM data */
 222             chunk_len = GET_DWORD(data, i);
 223             i += 4;
 224
 225             if (chunk_len < 16 || i + chunk_len >= dataLen) {
 226                 NS_WARNING("Invalid WAV file: bad fmt chunk.");
 227                 return NS_ERROR_FAILURE;
 228             }
 229
 230             format = GET_WORD(data, i);
 231             i += 2;
 232
 233             channels = GET_WORD(data, i);
 234             i += 2;
 235
 236             samples_per_sec = GET_DWORD(data, i);
 237             i += 4;
 238
 239             avg_bytes_per_sec = GET_DWORD(data, i);
 240             i += 4;
 241
 242             // block align
 243             i += 2;
 244
 245             bits_per_sample = GET_WORD(data, i);
 246             i += 2;
 247
 248             /* we don't support WAVs with odd compression codes */
 249             if (chunk_len != 16)
 250                 NS_WARNING("Extra format bits found in WAV. Ignoring");
 251
 252             i += chunk_len - 16;
 253         } else if (!memcmp(data + i, "data", 4)) {
 254             i += 4;
 255             if (!chunk_len) {
 256                 NS_WARNING("Invalid WAV file: no fmt chunk found");
 257                 return NS_ERROR_FAILURE;
 258             }
 259
 260             audio_len = GET_DWORD(data, i);
 261             i += 4;
 262
 263             /* try to play truncated WAVs */
 264             if (i + audio_len > dataLen)
 265                 audio_len = dataLen - i;
 266
 267             audio = data + i;
 268             break;
 269         } else {
 270             i += 4;
 271             i += GET_DWORD(data, i);
 272             i += 4;
 273         }
 274     }
 275
 276     if (!audio) {
 277         NS_WARNING("Invalid WAV file: no data chunk found");
 278         return NS_ERROR_FAILURE;
 279     }
 280
 281     /* No audio data? well, at least the WAV was valid. */
 282     if (!audio_len)
 283         return NS_OK;
 284
 285 #if 0
 286     printf("f: %d | c: %d | sps: %li | abps: %li | ba: %d | bps: %d | rate: %li\n",
 287          format, channels, samples_per_sec, avg_bytes_per_sec, block_align, bits_per_sample, rate);
 288 #endif
 289
 290     /* open up connection to esd */
 291     EsdPlayStreamType EsdPlayStream =
 292         (EsdPlayStreamType) PR_FindFunctionSymbol(elib,
 293                                                   "esd_play_stream");
 294     if (!EsdPlayStream)
 295         return NS_ERROR_FAILURE;
 296
 297     mask = ESD_PLAY | ESD_STREAM;
 298
 299     if (bits_per_sample == 8)
 300         mask |= ESD_BITS8;
 301     else
 302         mask |= ESD_BITS16;
 303
 304     if (channels == 1)
 305         mask |= ESD_MONO;
 306     else
 307         mask |= ESD_STEREO;
 308
 309     nsAutoArrayPtr<PRUint8> buf;
 310
 311     // ESD only handle little-endian data.
 312     // Swap the byte order if we're on a big-endian architecture.
 313 #ifdef IS_BIG_ENDIAN
 314     if (bits_per_sample != 8) {
 315         buf = new PRUint8[audio_len];
 316         if (!buf)
 317             return NS_ERROR_OUT_OF_MEMORY;
 318         for (PRUint32 j = 0; j + 2 < audio_len; j += 2) {
 319             buf[j]     = audio[j + 1];
 320             buf[j + 1] = audio[j];
 321         }
 322
 323     audio = buf;
 324     }
 325 #endif
 326
 327     fd = (*EsdPlayStream)(mask, samples_per_sec, NULL, "mozillaSound");
 328
 329     if (fd < 0) {
 330       int *esd_audio_format = (int *) PR_FindSymbol(elib, "esd_audio_format");
 331       int *esd_audio_rate = (int *) PR_FindSymbol(elib, "esd_audio_rate");
 332       EsdAudioOpenType EsdAudioOpen = (EsdAudioOpenType) PR_FindFunctionSymbol(elib, "esd_audio_open");
 333       EsdAudioWriteType EsdAudioWrite = (EsdAudioWriteType) PR_FindFunctionSymbol(elib, "esd_audio_write");
 334       EsdAudioCloseType EsdAudioClose = (EsdAudioCloseType) PR_FindFunctionSymbol(elib, "esd_audio_close");
 335
 336       if (!esd_audio_format || !esd_audio_rate ||
 337           !EsdAudioOpen || !EsdAudioWrite || !EsdAudioClose)
 338           return NS_ERROR_FAILURE;
 339
 340       *esd_audio_format = mask;
 341       *esd_audio_rate = samples_per_sec;
 342       fd = (*EsdAudioOpen)();
 343
 344       if (fd < 0)
 345         return NS_ERROR_FAILURE;
 346
 347       (*EsdAudioWrite)(audio, audio_len);
 348       (*EsdAudioClose)();
 349     } else {
 350       while (audio_len > 0) {
 351         size_t written = write(fd, audio, audio_len);
 352         if (written <= 0)
 353           break;
 354         audio += written;
 355         audio_len -= written;
 356       }
 357       close(fd);
 358     }
 359
 360     return NS_OK;
 361 }
 362
 363 NS_METHOD nsSound::Play(nsIURL *aURL)
 364 {
 365     nsresult rv;
 366
 367     if (!mInited)
 368         Init();
 369
 370     if (!elib)
 371         return NS_ERROR_FAILURE;
 372
 373     nsCOMPtr<nsIStreamLoader> loader;
 374     rv = NS_NewStreamLoader(getter_AddRefs(loader), aURL, this);
 375
 376     return rv;
 377 }
 378
 379 NS_IMETHODIMP nsSound::PlaySystemSound(const nsAString &aSoundAlias)
 380 {
 381     if (NS_IsMozAliasSound(aSoundAlias)) {
 382       if (aSoundAlias.Equals(NS_SYSSOUND_MAIL_BEEP))
 383         return Beep();
 384       return NS_OK;
 385     }
 386
 387     nsresult rv;
 388     nsCOMPtr <nsIURI> fileURI;
 389
 390     // create a nsILocalFile and then a nsIFileURL from that
 391     nsCOMPtr <nsILocalFile> soundFile;
 392     rv = NS_NewLocalFile(aSoundAlias, PR_TRUE,
 393                          getter_AddRefs(soundFile));
 394     NS_ENSURE_SUCCESS(rv,rv);
 395
 396     rv = NS_NewFileURI(getter_AddRefs(fileURI), soundFile);
 397     NS_ENSURE_SUCCESS(rv,rv);
 398
 399     nsCOMPtr<nsIFileURL> fileURL = do_QueryInterface(fileURI,&rv);
 400     NS_ENSURE_SUCCESS(rv,rv);
 401
 402     rv = Play(fileURL);
 403     return rv;
 404
 405 }