dlls/mp3dmod/mp3dmod.c

   1 /*
   2  * MP3 decoder DMO
   3  *
   4  * Copyright 2018 Zebediah Figura
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <stdarg.h>
  22 #include <stdio.h>
  23 #include <mpg123.h>
  24 #include "windef.h"
  25 #include "winbase.h"
  26 #include "wingdi.h"
  27 #include "mmreg.h"
  28 #define COBJMACROS
  29 #include "objbase.h"
  30 #include "dmo.h"
  31 #include "rpcproxy.h"
  32 #include "wmcodecdsp.h"
  33 #include "wine/debug.h"
  34 #include "wine/heap.h"
  35
  36 #include "initguid.h"
  37 DEFINE_GUID(WMMEDIATYPE_Audio, 0x73647561,0x0000,0x0010,0x80,0x00,0x00,0xaa,0x00,0x38,0x9b,0x71);
  38 DEFINE_GUID(WMMEDIASUBTYPE_MP3,0x00000055,0x0000,0x0010,0x80,0x00,0x00,0xaa,0x00,0x38,0x9b,0x71);
  39 DEFINE_GUID(WMMEDIASUBTYPE_PCM,0x00000001,0x0000,0x0010,0x80,0x00,0x00,0xaa,0x00,0x38,0x9b,0x71);
  40 DEFINE_GUID(WMFORMAT_WaveFormatEx,  0x05589f81,0xc356,0x11ce,0xbf,0x01,0x00,0xaa,0x00,0x55,0x59,0x5a);
  41
  42 WINE_DEFAULT_DEBUG_CHANNEL(mp3dmod);
  43
  44 struct mp3_decoder
  45 {
  46     IUnknown IUnknown_inner;
  47     IMediaObject IMediaObject_iface;
  48     IUnknown *outer;
  49     LONG ref;
  50     mpg123_handle *mh;
  51
  52     DMO_MEDIA_TYPE intype, outtype;
  53     BOOL intype_set, outtype_set;
  54
  55     IMediaBuffer *buffer;
  56     REFERENCE_TIME timestamp;
  57 };
  58
  59 static inline struct mp3_decoder *impl_from_IUnknown(IUnknown *iface)
  60 {
  61     return CONTAINING_RECORD(iface, struct mp3_decoder, IUnknown_inner);
  62 }
  63
  64 static HRESULT WINAPI Unknown_QueryInterface(IUnknown *iface, REFIID iid, void **obj)
  65 {
  66     struct mp3_decoder *This = impl_from_IUnknown(iface);
  67
  68     TRACE("(%p)->(%s, %p)\n", This, debugstr_guid(iid), obj);
  69
  70     if (IsEqualGUID(iid, &IID_IUnknown))
  71         *obj = &This->IUnknown_inner;
  72     else if (IsEqualGUID(iid, &IID_IMediaObject))
  73         *obj = &This->IMediaObject_iface;
  74     else
  75     {
  76         FIXME("no interface for %s\n", debugstr_guid(iid));
  77         *obj = NULL;
  78         return E_NOINTERFACE;
  79     }
  80
  81     IUnknown_AddRef((IUnknown *)*obj);
  82     return S_OK;
  83 }
  84
  85 static ULONG WINAPI Unknown_AddRef(IUnknown *iface)
  86 {
  87     struct mp3_decoder *This = impl_from_IUnknown(iface);
  88     ULONG refcount = InterlockedIncrement(&This->ref);
  89
  90     TRACE("(%p) AddRef from %d\n", This, refcount - 1);
  91
  92     return refcount;
  93 }
  94
  95 static ULONG WINAPI Unknown_Release(IUnknown *iface)
  96 {
  97     struct mp3_decoder *This = impl_from_IUnknown(iface);
  98     ULONG refcount = InterlockedDecrement(&This->ref);
  99
 100     TRACE("(%p) Release from %d\n", This, refcount + 1);
 101
 102     if (!refcount)
 103     {
 104         if (This->buffer)
 105             IMediaBuffer_Release(This->buffer);
 106         if (This->intype_set)
 107             MoFreeMediaType(&This->intype);
 108         MoFreeMediaType(&This->outtype);
 109         mpg123_delete(This->mh);
 110         heap_free(This);
 111     }
 112     return refcount;
 113 }
 114
 115 static const IUnknownVtbl Unknown_vtbl = {
 116     Unknown_QueryInterface,
 117     Unknown_AddRef,
 118     Unknown_Release,
 119 };
 120
 121 static inline struct mp3_decoder *impl_from_IMediaObject(IMediaObject *iface)
 122 {
 123     return CONTAINING_RECORD(iface, struct mp3_decoder, IMediaObject_iface);
 124 }
 125
 126 static HRESULT WINAPI MediaObject_QueryInterface(IMediaObject *iface, REFIID iid, void **obj)
 127 {
 128     struct mp3_decoder *This = impl_from_IMediaObject(iface);
 129     return IUnknown_QueryInterface(This->outer, iid, obj);
 130 }
 131
 132 static ULONG WINAPI MediaObject_AddRef(IMediaObject *iface)
 133 {
 134     struct mp3_decoder *This = impl_from_IMediaObject(iface);
 135     return IUnknown_AddRef(This->outer);
 136 }
 137
 138 static ULONG WINAPI MediaObject_Release(IMediaObject *iface)
 139 {
 140     struct mp3_decoder *This = impl_from_IMediaObject(iface);
 141     return IUnknown_Release(This->outer);
 142 }
 143
 144 static HRESULT WINAPI MediaObject_GetStreamCount(IMediaObject *iface, DWORD *input, DWORD *output)
 145 {
 146     TRACE("iface %p, input %p, output %p.\n", iface, input, output);
 147
 148     *input = *output = 1;
 149
 150     return S_OK;
 151 }
 152
 153 static HRESULT WINAPI MediaObject_GetInputStreamInfo(IMediaObject *iface, DWORD index, DWORD *flags)
 154 {
 155     TRACE("iface %p, index %u, flags %p.\n", iface, index, flags);
 156
 157     *flags = 0;
 158
 159     return S_OK;
 160 }
 161
 162 static HRESULT WINAPI MediaObject_GetOutputStreamInfo(IMediaObject *iface, DWORD index, DWORD *flags)
 163 {
 164     TRACE("iface %p, index %u, flags %p.\n", iface, index, flags);
 165
 166     *flags = 0;
 167
 168     return S_OK;
 169 }
 170
 171 static HRESULT WINAPI MediaObject_GetInputType(IMediaObject *iface, DWORD index, DWORD type_index, DMO_MEDIA_TYPE *type)
 172 {
 173     TRACE("iface %p, index %u, type_index %u, type %p.\n", iface, index, type_index, type);
 174
 175     if (type_index)
 176         return DMO_E_NO_MORE_ITEMS;
 177
 178     type->majortype = WMMEDIATYPE_Audio;
 179     type->subtype = WMMEDIASUBTYPE_MP3;
 180     type->formattype = GUID_NULL;
 181     type->pUnk = NULL;
 182     type->cbFormat = 0;
 183     type->pbFormat = NULL;
 184
 185     return S_OK;
 186 }
 187
 188 static HRESULT WINAPI MediaObject_GetOutputType(IMediaObject *iface, DWORD index, DWORD type_index, DMO_MEDIA_TYPE *type)
 189 {
 190     struct mp3_decoder *dmo = impl_from_IMediaObject(iface);
 191     const WAVEFORMATEX *input_format;
 192     WAVEFORMATEX *format;
 193
 194     TRACE("iface %p, index %u, type_index %u, type %p.\n", iface, index, type_index, type);
 195
 196     if (!dmo->intype_set)
 197         return DMO_E_TYPE_NOT_SET;
 198
 199     input_format = (WAVEFORMATEX *)dmo->intype.pbFormat;
 200
 201     if (type_index >= (2 * input_format->nChannels))
 202         return DMO_E_NO_MORE_ITEMS;
 203
 204     type->majortype = WMMEDIATYPE_Audio;
 205     type->subtype = WMMEDIASUBTYPE_PCM;
 206     type->formattype = WMFORMAT_WaveFormatEx;
 207     type->pUnk = NULL;
 208     type->cbFormat = sizeof(WAVEFORMATEX);
 209     if (!(type->pbFormat = CoTaskMemAlloc(sizeof(WAVEFORMATEX))))
 210         return E_OUTOFMEMORY;
 211     format = (WAVEFORMATEX *)type->pbFormat;
 212     format->wFormatTag = WAVE_FORMAT_PCM;
 213     format->nSamplesPerSec = input_format->nSamplesPerSec;
 214     format->nChannels = (type_index / 2) ? 1 : input_format->nChannels;
 215     format->wBitsPerSample = (type_index % 2) ? 8 : 16;
 216     format->nBlockAlign = format->nChannels * format->wBitsPerSample / 8;
 217     format->nAvgBytesPerSec = format->nSamplesPerSec * format->nBlockAlign;
 218     format->cbSize = 0;
 219
 220     return S_OK;
 221 }
 222
 223 static HRESULT WINAPI MediaObject_SetInputType(IMediaObject *iface, DWORD index, const DMO_MEDIA_TYPE *type, DWORD flags)
 224 {
 225     struct mp3_decoder *dmo = impl_from_IMediaObject(iface);
 226
 227     TRACE("iface %p, index %u, type %p, flags %#x.\n", iface, index, type, flags);
 228
 229     if (flags & DMO_SET_TYPEF_CLEAR)
 230     {
 231         if (dmo->intype_set)
 232             MoFreeMediaType(&dmo->intype);
 233         dmo->intype_set = FALSE;
 234         return S_OK;
 235     }
 236
 237     if (!IsEqualGUID(&type->majortype, &WMMEDIATYPE_Audio)
 238             || !IsEqualGUID(&type->subtype, &WMMEDIASUBTYPE_MP3)
 239             || !IsEqualGUID(&type->formattype, &WMFORMAT_WaveFormatEx))
 240         return DMO_E_TYPE_NOT_ACCEPTED;
 241
 242     if (!(flags & DMO_SET_TYPEF_TEST_ONLY))
 243     {
 244         if (dmo->intype_set)
 245             MoFreeMediaType(&dmo->intype);
 246         MoCopyMediaType(&dmo->intype, type);
 247         dmo->intype_set = TRUE;
 248     }
 249
 250     return S_OK;
 251 }
 252
 253 static HRESULT WINAPI MediaObject_SetOutputType(IMediaObject *iface, DWORD index, const DMO_MEDIA_TYPE *type, DWORD flags)
 254 {
 255     struct mp3_decoder *This = impl_from_IMediaObject(iface);
 256     WAVEFORMATEX *format;
 257     long enc;
 258     int err;
 259
 260     TRACE("(%p)->(%d, %p, %#x)\n", iface, index, type, flags);
 261
 262     if (flags & DMO_SET_TYPEF_CLEAR)
 263     {
 264         MoFreeMediaType(&This->outtype);
 265         This->outtype_set = FALSE;
 266         return S_OK;
 267     }
 268
 269     if (!IsEqualGUID(&type->formattype, &WMFORMAT_WaveFormatEx))
 270         return DMO_E_TYPE_NOT_ACCEPTED;
 271
 272     format = (WAVEFORMATEX *)type->pbFormat;
 273
 274     if (format->wBitsPerSample == 8)
 275         enc = MPG123_ENC_UNSIGNED_8;
 276     else if (format->wBitsPerSample == 16)
 277         enc = MPG123_ENC_SIGNED_16;
 278     else
 279     {
 280         ERR("Cannot decode to bit depth %u.\n", format->wBitsPerSample);
 281         return DMO_E_TYPE_NOT_ACCEPTED;
 282     }
 283
 284     if (!(flags & DMO_SET_TYPEF_TEST_ONLY))
 285     {
 286         err = mpg123_format(This->mh, format->nSamplesPerSec, format->nChannels, enc);
 287         if (err != MPG123_OK)
 288         {
 289             ERR("Failed to set format: %u channels, %u samples/sec, %u bits/sample.\n",
 290                 format->nChannels, format->nSamplesPerSec, format->wBitsPerSample);
 291             return DMO_E_TYPE_NOT_ACCEPTED;
 292         }
 293         MoCopyMediaType(&This->outtype, type);
 294         This->outtype_set = TRUE;
 295     }
 296
 297     return S_OK;
 298 }
 299
 300 static HRESULT WINAPI MediaObject_GetInputCurrentType(IMediaObject *iface, DWORD index, DMO_MEDIA_TYPE *type)
 301 {
 302     FIXME("(%p)->(%d, %p) stub!\n", iface, index, type);
 303
 304     return E_NOTIMPL;
 305 }
 306
 307 static HRESULT WINAPI MediaObject_GetOutputCurrentType(IMediaObject *iface, DWORD index, DMO_MEDIA_TYPE *type)
 308 {
 309     FIXME("(%p)->(%d, %p) stub!\n", iface, index, type);
 310
 311     return E_NOTIMPL;
 312 }
 313
 314 static HRESULT WINAPI MediaObject_GetInputSizeInfo(IMediaObject *iface,
 315         DWORD index, DWORD *size, DWORD *lookahead, DWORD *alignment)
 316 {
 317     struct mp3_decoder *dmo = impl_from_IMediaObject(iface);
 318
 319     TRACE("iface %p, index %u, size %p, lookahead %p, alignment %p.\n", iface, index, size, lookahead, alignment);
 320
 321     if (!dmo->intype_set || !dmo->outtype_set)
 322         return DMO_E_TYPE_NOT_SET;
 323
 324     *size = 0;
 325     *alignment = 1;
 326     return S_OK;
 327 }
 328
 329 static HRESULT WINAPI MediaObject_GetOutputSizeInfo(IMediaObject *iface, DWORD index, DWORD *size, DWORD *alignment)
 330 {
 331     struct mp3_decoder *dmo = impl_from_IMediaObject(iface);
 332
 333     TRACE("iface %p, index %u, size %p, alignment %p.\n", iface, index, size, alignment);
 334
 335     if (!dmo->intype_set || !dmo->outtype_set)
 336         return DMO_E_TYPE_NOT_SET;
 337
 338     *size = 2 * 1152 * ((WAVEFORMATEX *)dmo->outtype.pbFormat)->wBitsPerSample / 8;
 339     *alignment = 1;
 340     return S_OK;
 341 }
 342
 343 static HRESULT WINAPI MediaObject_GetInputMaxLatency(IMediaObject *iface, DWORD index, REFERENCE_TIME *latency)
 344 {
 345     FIXME("(%p)->(%d, %p) stub!\n", iface, index, latency);
 346
 347     return E_NOTIMPL;
 348 }
 349
 350 static HRESULT WINAPI MediaObject_SetInputMaxLatency(IMediaObject *iface, DWORD index, REFERENCE_TIME latency)
 351 {
 352     FIXME("(%p)->(%d, %s) stub!\n", iface, index, wine_dbgstr_longlong(latency));
 353
 354     return E_NOTIMPL;
 355 }
 356
 357 static HRESULT WINAPI MediaObject_Flush(IMediaObject *iface)
 358 {
 359     struct mp3_decoder *dmo = impl_from_IMediaObject(iface);
 360
 361     TRACE("iface %p.\n", iface);
 362
 363     if (dmo->buffer)
 364         IMediaBuffer_Release(dmo->buffer);
 365     dmo->buffer = NULL;
 366     dmo->timestamp = 0;
 367
 368     /* mpg123 doesn't give us a way to flush, so just close and reopen the feed. */
 369     mpg123_close(dmo->mh);
 370     mpg123_open_feed(dmo->mh);
 371
 372     return S_OK;
 373 }
 374
 375 static HRESULT WINAPI MediaObject_Discontinuity(IMediaObject *iface, DWORD index)
 376 {
 377     TRACE("iface %p.\n", iface);
 378
 379     return S_OK;
 380 }
 381
 382 static HRESULT WINAPI MediaObject_AllocateStreamingResources(IMediaObject *iface)
 383 {
 384     FIXME("(%p)->() stub!\n", iface);
 385
 386     return E_NOTIMPL;
 387 }
 388
 389 static HRESULT WINAPI MediaObject_FreeStreamingResources(IMediaObject *iface)
 390 {
 391     FIXME("(%p)->() stub!\n", iface);
 392
 393     return E_NOTIMPL;
 394 }
 395
 396 static HRESULT WINAPI MediaObject_GetInputStatus(IMediaObject *iface, DWORD index, DWORD *flags)
 397 {
 398     FIXME("(%p)->(%d, %p) stub!\n", iface, index, flags);
 399
 400     return E_NOTIMPL;
 401 }
 402
 403 static HRESULT WINAPI MediaObject_ProcessInput(IMediaObject *iface, DWORD index,
 404     IMediaBuffer *buffer, DWORD flags, REFERENCE_TIME timestamp, REFERENCE_TIME timelength)
 405 {
 406     struct mp3_decoder *This = impl_from_IMediaObject(iface);
 407     HRESULT hr;
 408     BYTE *data;
 409     DWORD len;
 410     int err;
 411
 412     TRACE("(%p)->(%d, %p, %#x, %s, %s)\n", iface, index, buffer, flags,
 413           wine_dbgstr_longlong(timestamp), wine_dbgstr_longlong(timelength));
 414
 415     if (This->buffer)
 416     {
 417         ERR("Already have a buffer.\n");
 418         return DMO_E_NOTACCEPTING;
 419     }
 420
 421     IMediaBuffer_AddRef(buffer);
 422     This->buffer = buffer;
 423
 424     hr = IMediaBuffer_GetBufferAndLength(buffer, &data, &len);
 425     if (FAILED(hr))
 426         return hr;
 427
 428     err = mpg123_feed(This->mh, data, len);
 429     if (err != MPG123_OK)
 430     {
 431         ERR("mpg123_feed() failed: %s\n", mpg123_strerror(This->mh));
 432         return E_FAIL;
 433     }
 434
 435     return S_OK;
 436 }
 437
 438 static DWORD get_framesize(DMO_MEDIA_TYPE *type)
 439 {
 440     WAVEFORMATEX *format = (WAVEFORMATEX *)type->pbFormat;
 441     return 1152 * format->nBlockAlign;
 442 }
 443
 444 static REFERENCE_TIME get_frametime(DMO_MEDIA_TYPE *type)
 445 {
 446     WAVEFORMATEX *format = (WAVEFORMATEX *)type->pbFormat;
 447     return (REFERENCE_TIME) 10000000 * 1152 / format->nSamplesPerSec;
 448 }
 449
 450 static HRESULT WINAPI MediaObject_ProcessOutput(IMediaObject *iface, DWORD flags, DWORD count, DMO_OUTPUT_DATA_BUFFER *buffers, DWORD *status)
 451 {
 452     struct mp3_decoder *This = impl_from_IMediaObject(iface);
 453     REFERENCE_TIME time = 0, frametime;
 454     DWORD len, maxlen, framesize;
 455     int got_data = 0;
 456     size_t written;
 457     HRESULT hr;
 458     BYTE *data;
 459     int err;
 460
 461     TRACE("(%p)->(%#x, %d, %p, %p)\n", iface, flags, count, buffers, status);
 462
 463     if (count > 1)
 464         FIXME("Multiple buffers not handled.\n");
 465
 466     buffers[0].dwStatus = 0;
 467
 468     if (!buffers[0].pBuffer)
 469     {
 470         while ((err = mpg123_read(This->mh, NULL, 0, &written)) == MPG123_NEW_FORMAT);
 471         if (err == MPG123_NEED_MORE)
 472             return S_OK;
 473         else if (err == MPG123_ERR)
 474             ERR("mpg123_read() failed: %s\n", mpg123_strerror(This->mh));
 475         else if (err != MPG123_OK)
 476             ERR("mpg123_read() returned %d\n", err);
 477
 478         buffers[0].dwStatus = DMO_OUTPUT_DATA_BUFFERF_INCOMPLETE;
 479         return S_OK;
 480     }
 481
 482     if (!This->buffer)
 483         return S_FALSE;
 484
 485     buffers[0].dwStatus |= DMO_OUTPUT_DATA_BUFFERF_SYNCPOINT;
 486
 487     hr = IMediaBuffer_GetBufferAndLength(buffers[0].pBuffer, &data, &len);
 488     if (FAILED(hr)) return hr;
 489
 490     hr = IMediaBuffer_GetMaxLength(buffers[0].pBuffer, &maxlen);
 491     if (FAILED(hr)) return hr;
 492
 493     framesize = get_framesize(&This->outtype);
 494     frametime = get_frametime(&This->outtype);
 495
 496     while (1)
 497     {
 498         if (maxlen - len < framesize)
 499         {
 500             buffers[0].dwStatus |= DMO_OUTPUT_DATA_BUFFERF_INCOMPLETE;
 501             break;
 502         }
 503
 504         while ((err = mpg123_read(This->mh, data + len, framesize, &written)) == MPG123_NEW_FORMAT);
 505         if (err == MPG123_NEED_MORE)
 506         {
 507             IMediaBuffer_Release(This->buffer);
 508             This->buffer = NULL;
 509             break;
 510         }
 511         else if (err == MPG123_ERR)
 512             ERR("mpg123_read() failed: %s\n", mpg123_strerror(This->mh));
 513         else if (err != MPG123_OK)
 514             ERR("mpg123_read() returned %d\n", err);
 515         if (written < framesize)
 516             ERR("short write: %zd/%u\n", written, framesize);
 517
 518         got_data = 1;
 519
 520         len += framesize;
 521         hr = IMediaBuffer_SetLength(buffers[0].pBuffer, len);
 522         if (FAILED(hr)) return hr;
 523
 524         time += frametime;
 525     }
 526
 527     if (got_data)
 528     {
 529         buffers[0].dwStatus |= (DMO_OUTPUT_DATA_BUFFERF_TIME | DMO_OUTPUT_DATA_BUFFERF_TIMELENGTH);
 530         buffers[0].rtTimelength = time;
 531         buffers[0].rtTimestamp = This->timestamp;
 532         This->timestamp += time;
 533         return S_OK;
 534     }
 535     return S_FALSE;
 536 }
 537
 538 static HRESULT WINAPI MediaObject_Lock(IMediaObject *iface, LONG lock)
 539 {
 540     FIXME("(%p)->(%d) stub!\n", iface, lock);
 541
 542     return E_NOTIMPL;
 543 }
 544
 545 static const IMediaObjectVtbl MediaObject_vtbl = {
 546     MediaObject_QueryInterface,
 547     MediaObject_AddRef,
 548     MediaObject_Release,
 549     MediaObject_GetStreamCount,
 550     MediaObject_GetInputStreamInfo,
 551     MediaObject_GetOutputStreamInfo,
 552     MediaObject_GetInputType,
 553     MediaObject_GetOutputType,
 554     MediaObject_SetInputType,
 555     MediaObject_SetOutputType,
 556     MediaObject_GetInputCurrentType,
 557     MediaObject_GetOutputCurrentType,
 558     MediaObject_GetInputSizeInfo,
 559     MediaObject_GetOutputSizeInfo,
 560     MediaObject_GetInputMaxLatency,
 561     MediaObject_SetInputMaxLatency,
 562     MediaObject_Flush,
 563     MediaObject_Discontinuity,
 564     MediaObject_AllocateStreamingResources,
 565     MediaObject_FreeStreamingResources,
 566     MediaObject_GetInputStatus,
 567     MediaObject_ProcessInput,
 568     MediaObject_ProcessOutput,
 569     MediaObject_Lock,
 570 };
 571
 572 static HRESULT create_mp3_decoder(IUnknown *outer, REFIID iid, void **obj)
 573 {
 574     struct mp3_decoder *This;
 575     HRESULT hr;
 576     int err;
 577
 578     if (!(This = heap_alloc_zero(sizeof(*This))))
 579         return E_OUTOFMEMORY;
 580
 581     This->IUnknown_inner.lpVtbl = &Unknown_vtbl;
 582     This->IMediaObject_iface.lpVtbl = &MediaObject_vtbl;
 583     This->ref = 1;
 584     This->outer = outer ? outer : &This->IUnknown_inner;
 585
 586     mpg123_init();
 587     This->mh = mpg123_new(NULL, &err);
 588     mpg123_open_feed(This->mh);
 589     mpg123_format_none(This->mh);
 590
 591     hr = IUnknown_QueryInterface(&This->IUnknown_inner, iid, obj);
 592     IUnknown_Release(&This->IUnknown_inner);
 593     return hr;
 594 }
 595
 596 static HRESULT WINAPI ClassFactory_QueryInterface(IClassFactory *iface, REFIID iid, void **obj)
 597 {
 598     TRACE("(%p, %s, %p)\n", iface, debugstr_guid(iid), obj);
 599
 600     if (IsEqualGUID(&IID_IUnknown, iid) ||
 601         IsEqualGUID(&IID_IClassFactory, iid))
 602     {
 603         IClassFactory_AddRef(iface);
 604         *obj = iface;
 605         return S_OK;
 606     }
 607
 608     *obj = NULL;
 609     WARN("no interface for %s\n", debugstr_guid(iid));
 610     return E_NOINTERFACE;
 611 }
 612
 613 static ULONG WINAPI ClassFactory_AddRef(IClassFactory *iface)
 614 {
 615     return 2;
 616 }
 617
 618 static ULONG WINAPI ClassFactory_Release(IClassFactory *iface)
 619 {
 620     return 1;
 621 }
 622
 623 static HRESULT WINAPI ClassFactory_CreateInstance(IClassFactory *iface, IUnknown *outer, REFIID iid, void **obj)
 624 {
 625     TRACE("(%p, %s, %p)\n", outer, debugstr_guid(iid), obj);
 626
 627     if (outer && !IsEqualGUID(iid, &IID_IUnknown))
 628     {
 629         *obj = NULL;
 630         return E_NOINTERFACE;
 631     }
 632
 633     return create_mp3_decoder(outer, iid, obj);
 634 }
 635
 636 static HRESULT WINAPI ClassFactory_LockServer(IClassFactory *iface, BOOL lock)
 637 {
 638     FIXME("(%d) stub\n", lock);
 639     return S_OK;
 640 }
 641
 642 static const IClassFactoryVtbl classfactory_vtbl = {
 643     ClassFactory_QueryInterface,
 644     ClassFactory_AddRef,
 645     ClassFactory_Release,
 646     ClassFactory_CreateInstance,
 647     ClassFactory_LockServer
 648 };
 649
 650 static IClassFactory mp3_decoder_cf = { &classfactory_vtbl };
 651
 652 /*************************************************************************
 653  *              DllGetClassObject (DSDMO.@)
 654  */
 655 HRESULT WINAPI DllGetClassObject(REFCLSID clsid, REFIID iid, void **obj)
 656 {
 657     TRACE("%s, %s, %p\n", debugstr_guid(clsid), debugstr_guid(iid), obj);
 658
 659     if (IsEqualGUID(clsid, &CLSID_CMP3DecMediaObject))
 660         return IClassFactory_QueryInterface(&mp3_decoder_cf, iid, obj);
 661
 662     FIXME("class %s not available\n", debugstr_guid(clsid));
 663     return CLASS_E_CLASSNOTAVAILABLE;
 664 }
 665
 666 /***********************************************************************
 667  *              DllRegisterServer (DSDMO.@)
 668  */
 669 HRESULT WINAPI DllRegisterServer(void)
 670 {
 671     static const WCHAR nameW[] = {'M','P','3',' ','D','e','c','o','d','e','r',' ','D','M','O',0};
 672     DMO_PARTIAL_MEDIATYPE in, out;
 673     HRESULT hr;
 674
 675     in.type = WMMEDIATYPE_Audio;
 676     in.subtype = WMMEDIASUBTYPE_MP3;
 677     out.type = WMMEDIATYPE_Audio;
 678     out.subtype = WMMEDIASUBTYPE_PCM;
 679     hr = DMORegister(nameW, &CLSID_CMP3DecMediaObject, &DMOCATEGORY_AUDIO_DECODER,
 680         0, 1, &in, 1, &out);
 681     if (FAILED(hr)) return hr;
 682
 683     return __wine_register_resources();
 684 }
 685
 686 /***********************************************************************
 687  *              DllUnregisterServer (DSDMO.@)
 688  */
 689 HRESULT WINAPI DllUnregisterServer(void)
 690 {
 691     HRESULT hr;
 692
 693     hr = DMOUnregister(&CLSID_CMP3DecMediaObject, &DMOCATEGORY_AUDIO_DECODER);
 694     if (FAILED(hr)) return hr;
 695
 696     return __wine_unregister_resources();
 697 }