git.oblomov.eu Git - wine/blob - dlls/dmusic/instrument.c

   1 /*
   2  * IDirectMusicInstrument Implementation
   3  *
   4  * Copyright (C) 2003-2004 Rok Mandeljc
   5  *
   6  * This program 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 program 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 program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "dmusic_private.h"
  22
  23 WINE_DEFAULT_DEBUG_CHANNEL(dmusic);
  24
  25 static const GUID IID_IDirectMusicInstrumentPRIVATE = { 0xbcb20080, 0xa40c, 0x11d1, { 0x86, 0xbc, 0x00, 0xc0, 0x4f, 0xbf, 0x8f, 0xef } };
  26
  27 /* IDirectMusicInstrument IUnknown part: */
  28 static HRESULT WINAPI IDirectMusicInstrumentImpl_QueryInterface(LPDIRECTMUSICINSTRUMENT iface, REFIID riid, LPVOID *ret_iface)
  29 {
  30     TRACE("(%p)->(%s, %p)\n", iface, debugstr_dmguid(riid), ret_iface);
  31
  32     if (IsEqualIID(riid, &IID_IUnknown) ||
  33         IsEqualIID(riid, &IID_IDirectMusicInstrument))
  34     {
  35         *ret_iface = iface;
  36         IDirectMusicInstrument_AddRef(iface);
  37         return S_OK;
  38     }
  39     else if (IsEqualIID(riid, &IID_IDirectMusicInstrumentPRIVATE))
  40     {
  41         /* it seems to me that this interface is only basic IUnknown, without any
  42          * other inherited functions... *sigh* this is the worst scenario, since it means
  43          * that whoever calls it knows the layout of original implementation table and therefore
  44          * tries to get data by direct access... expect crashes
  45          */
  46         FIXME("*sigh*... requested private/unspecified interface\n");
  47
  48         *ret_iface = iface;
  49         IDirectMusicInstrument_AddRef(iface);
  50         return S_OK;
  51     }
  52
  53     WARN("(%p)->(%s, %p): not found\n", iface, debugstr_dmguid(riid), ret_iface);
  54
  55     return E_NOINTERFACE;
  56 }
  57
  58 static ULONG WINAPI IDirectMusicInstrumentImpl_AddRef(LPDIRECTMUSICINSTRUMENT iface)
  59 {
  60     IDirectMusicInstrumentImpl *This = impl_from_IDirectMusicInstrument(iface);
  61     ULONG ref = InterlockedIncrement(&This->ref);
  62
  63     TRACE("(%p)->(): new ref = %u\n", iface, ref);
  64
  65     DMUSIC_LockModule();
  66
  67     return ref;
  68 }
  69
  70 static ULONG WINAPI IDirectMusicInstrumentImpl_Release(LPDIRECTMUSICINSTRUMENT iface)
  71 {
  72     IDirectMusicInstrumentImpl *This = impl_from_IDirectMusicInstrument(iface);
  73     ULONG ref = InterlockedDecrement(&This->ref);
  74
  75     TRACE("(%p)->(): new ref = %u\n", iface, ref);
  76
  77     if (!ref)
  78         HeapFree(GetProcessHeap(), 0, This);
  79
  80     DMUSIC_UnlockModule();
  81
  82     return ref;
  83 }
  84
  85 /* IDirectMusicInstrumentImpl IDirectMusicInstrument part: */
  86 static HRESULT WINAPI IDirectMusicInstrumentImpl_GetPatch(LPDIRECTMUSICINSTRUMENT iface, DWORD* pdwPatch)
  87 {
  88     IDirectMusicInstrumentImpl *This = impl_from_IDirectMusicInstrument(iface);
  89
  90     TRACE("(%p)->(%p)\n", This, pdwPatch);
  91
  92     *pdwPatch = MIDILOCALE2Patch(&This->pHeader->Locale);
  93
  94     return S_OK;
  95 }
  96
  97 static HRESULT WINAPI IDirectMusicInstrumentImpl_SetPatch(LPDIRECTMUSICINSTRUMENT iface, DWORD dwPatch)
  98 {
  99     IDirectMusicInstrumentImpl *This = impl_from_IDirectMusicInstrument(iface);
 100
 101     TRACE("(%p)->(%d): stub\n", This, dwPatch);
 102
 103     Patch2MIDILOCALE(dwPatch, &This->pHeader->Locale);
 104
 105     return S_OK;
 106 }
 107
 108 static const IDirectMusicInstrumentVtbl DirectMusicInstrument_Vtbl =
 109 {
 110     IDirectMusicInstrumentImpl_QueryInterface,
 111     IDirectMusicInstrumentImpl_AddRef,
 112     IDirectMusicInstrumentImpl_Release,
 113     IDirectMusicInstrumentImpl_GetPatch,
 114     IDirectMusicInstrumentImpl_SetPatch
 115 };
 116
 117 /* for ClassFactory */
 118 HRESULT DMUSIC_CreateDirectMusicInstrumentImpl (LPCGUID lpcGUID, LPVOID* ppobj, LPUNKNOWN pUnkOuter) {
 119         IDirectMusicInstrumentImpl* dminst;
 120
 121         dminst = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDirectMusicInstrumentImpl));
 122         if (NULL == dminst) {
 123                 *ppobj = NULL;
 124                 return E_OUTOFMEMORY;
 125         }
 126         dminst->IDirectMusicInstrument_iface.lpVtbl = &DirectMusicInstrument_Vtbl;
 127         dminst->ref = 0; /* will be inited by QueryInterface */
 128
 129         return IDirectMusicInstrument_QueryInterface(&dminst->IDirectMusicInstrument_iface, lpcGUID, ppobj);
 130 }
 131
 132 static HRESULT read_from_stream(IStream *stream, void *data, ULONG size)
 133 {
 134     ULONG bytes_read;
 135     HRESULT hr;
 136
 137     hr = IStream_Read(stream, data, size, &bytes_read);
 138     if(FAILED(hr)){
 139         TRACE("IStream_Read failed: %08x\n", hr);
 140         return hr;
 141     }
 142     if (bytes_read < size) {
 143         TRACE("Didn't read full chunk: %u < %u\n", bytes_read, size);
 144         return E_FAIL;
 145     }
 146
 147     return S_OK;
 148 }
 149
 150 static inline DWORD subtract_bytes(DWORD len, DWORD bytes)
 151 {
 152     if(bytes > len){
 153         TRACE("Apparent mismatch in chunk lengths? %u bytes remaining, %u bytes read\n", len, bytes);
 154         return 0;
 155     }
 156     return len - bytes;
 157 }
 158
 159 static inline HRESULT advance_stream(IStream *stream, ULONG bytes)
 160 {
 161     LARGE_INTEGER move;
 162     HRESULT ret;
 163
 164     move.QuadPart = bytes;
 165
 166     ret = IStream_Seek(stream, move, STREAM_SEEK_CUR, NULL);
 167     if (FAILED(ret))
 168         WARN("IStream_Seek failed: %08x\n", ret);
 169
 170     return ret;
 171 }
 172
 173 /* Function that loads all instrument data and which is called from IDirectMusicCollection_GetInstrument as in native */
 174 HRESULT IDirectMusicInstrumentImpl_CustomLoad(IDirectMusicInstrument *iface, IStream *stream)
 175 {
 176     IDirectMusicInstrumentImpl *This = impl_from_IDirectMusicInstrument(iface);
 177     HRESULT hr;
 178     DMUS_PRIVATE_CHUNK chunk;
 179     ULONG length = This->length;
 180
 181     TRACE("(%p, %p): offset = 0x%s, length = %u)\n", This, stream, wine_dbgstr_longlong(This->liInstrumentPosition.QuadPart), This->length);
 182
 183     hr = IStream_Seek(stream, This->liInstrumentPosition, STREAM_SEEK_SET, NULL);
 184     if (FAILED(hr))
 185     {
 186         WARN("IStream_Seek failed: %08x\n", hr);
 187         return DMUS_E_UNSUPPORTED_STREAM;
 188     }
 189
 190     while (length)
 191     {
 192         hr = read_from_stream(stream, &chunk, sizeof(chunk));
 193         if (FAILED(hr))
 194             return DMUS_E_UNSUPPORTED_STREAM;
 195
 196         length = subtract_bytes(length, sizeof(chunk) + chunk.dwSize);
 197
 198         switch (chunk.fccID)
 199         {
 200             case FOURCC_INSH:
 201             case FOURCC_DLID:
 202                 TRACE("Chunk %s: %u bytes\n", debugstr_fourcc(chunk.fccID), chunk.dwSize);
 203
 204                 /* Instrument header and id are already set so just skip */
 205                 hr = advance_stream(stream, chunk.dwSize);
 206                 if (FAILED(hr))
 207                     return DMUS_E_UNSUPPORTED_STREAM;
 208
 209                 break;
 210
 211             default:
 212                 TRACE("Unknown chunk %s: %u bytes\n", debugstr_fourcc(chunk.fccID), chunk.dwSize);
 213
 214                 hr = advance_stream(stream, chunk.dwSize);
 215                 if (FAILED(hr))
 216                     return DMUS_E_UNSUPPORTED_STREAM;
 217
 218                 break;
 219         }
 220     }
 221
 222     return S_OK;
 223 }