dlls/dmusic/buffer.c

   1 /* IDirectMusicBuffer Implementation
   2  *
   3  * Copyright (C) 2003-2004 Rok Mandeljc
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  18  */
  19
  20 #include "dmusic_private.h"
  21 #include "initguid.h"
  22 #include "dmksctrl.h"
  23
  24 WINE_DEFAULT_DEBUG_CHANNEL(dmusic);
  25
  26 static inline IDirectMusicBufferImpl *impl_from_IDirectMusicBuffer(IDirectMusicBuffer *iface)
  27 {
  28     return CONTAINING_RECORD(iface, IDirectMusicBufferImpl, IDirectMusicBuffer_iface);
  29 }
  30
  31 /* IDirectMusicBufferImpl IUnknown part: */
  32 static HRESULT WINAPI IDirectMusicBufferImpl_QueryInterface(LPDIRECTMUSICBUFFER iface, REFIID riid, LPVOID *ret_iface)
  33 {
  34     TRACE("(%p)->(%s, %p)\n", iface, debugstr_dmguid(riid), ret_iface);
  35
  36     if (IsEqualIID(riid, &IID_IUnknown) ||
  37         IsEqualIID(riid, &IID_IDirectMusicBuffer))
  38     {
  39         IDirectMusicBuffer_AddRef(iface);
  40         *ret_iface = iface;
  41         return S_OK;
  42     }
  43
  44     *ret_iface = NULL;
  45
  46     WARN("(%p)->(%s, %p): not found\n", iface, debugstr_dmguid(riid), ret_iface);
  47
  48     return E_NOINTERFACE;
  49 }
  50
  51 static ULONG WINAPI IDirectMusicBufferImpl_AddRef(LPDIRECTMUSICBUFFER iface)
  52 {
  53     IDirectMusicBufferImpl *This = impl_from_IDirectMusicBuffer(iface);
  54     ULONG ref = InterlockedIncrement(&This->ref);
  55
  56     TRACE("(%p)->(): new ref = %u\n", iface, ref);
  57
  58     DMUSIC_LockModule();
  59
  60     return ref;
  61 }
  62
  63 static ULONG WINAPI IDirectMusicBufferImpl_Release(LPDIRECTMUSICBUFFER iface)
  64 {
  65     IDirectMusicBufferImpl *This = impl_from_IDirectMusicBuffer(iface);
  66     ULONG ref = InterlockedDecrement(&This->ref);
  67
  68     TRACE("(%p)->(): new ref = %u\n", iface, ref);
  69
  70     if (!ref) {
  71         HeapFree(GetProcessHeap(), 0, This->data);
  72         HeapFree(GetProcessHeap(), 0, This);
  73     }
  74
  75     DMUSIC_UnlockModule();
  76
  77     return ref;
  78 }
  79
  80 /* IDirectMusicBufferImpl IDirectMusicBuffer part: */
  81 static HRESULT WINAPI IDirectMusicBufferImpl_Flush(LPDIRECTMUSICBUFFER iface)
  82 {
  83     IDirectMusicBufferImpl *This = impl_from_IDirectMusicBuffer(iface);
  84
  85     TRACE("(%p)->()\n", iface);
  86
  87     This->write_pos = 0;
  88
  89     return S_OK;
  90 }
  91
  92 static HRESULT WINAPI IDirectMusicBufferImpl_TotalTime(LPDIRECTMUSICBUFFER iface, LPREFERENCE_TIME prtTime)
  93 {
  94     IDirectMusicBufferImpl *This = impl_from_IDirectMusicBuffer(iface);
  95
  96     FIXME("(%p, %p): stub\n", This, prtTime);
  97
  98     return S_OK;
  99 }
 100
 101 static HRESULT WINAPI IDirectMusicBufferImpl_PackStructured(LPDIRECTMUSICBUFFER iface, REFERENCE_TIME ref_time, DWORD channel_group, DWORD channel_message)
 102 {
 103     IDirectMusicBufferImpl *This = impl_from_IDirectMusicBuffer(iface);
 104     DWORD new_write_pos = This->write_pos + sizeof(DMUS_EVENTHEADER) + sizeof(DWORD);
 105     DMUS_EVENTHEADER header;
 106
 107     TRACE("(%p)->(0x%s, %u, 0x%x)\n", iface, wine_dbgstr_longlong(ref_time), channel_group, channel_message);
 108
 109     if (new_write_pos > This->size)
 110         return DMUS_E_BUFFER_FULL;
 111
 112     /* Channel_message 0xZZYYXX (3 bytes) is a midi message where XX = status byte, YY = byte 1 and ZZ = byte 2 */
 113
 114     if (!(channel_message & 0x80))
 115     {
 116         /* Status byte MSB is always set */
 117         return DMUS_E_INVALID_EVENT;
 118     }
 119
 120     if (!This->write_pos)
 121         This->start_time = ref_time;
 122
 123     header.cbEvent = 3; /* Midi message takes 4 bytes space but only 3 are relevant */
 124     header.dwChannelGroup = channel_group;
 125     header.rtDelta = ref_time - This->start_time;
 126     header.dwFlags = DMUS_EVENT_STRUCTURED;
 127
 128     memcpy(This->data + This->write_pos, &header, sizeof(header));
 129     *(DWORD*)(This->data + This->write_pos + sizeof(header)) = channel_message;
 130     This->write_pos = new_write_pos;
 131
 132     return S_OK;
 133 }
 134
 135 static HRESULT WINAPI IDirectMusicBufferImpl_PackUnstructured(LPDIRECTMUSICBUFFER iface, REFERENCE_TIME rt, DWORD dwChannelGroup, DWORD cb, LPBYTE lpb)
 136 {
 137     IDirectMusicBufferImpl *This = impl_from_IDirectMusicBuffer(iface);
 138
 139     FIXME("(%p, 0x%s, %d, %d, %p): stub\n", This, wine_dbgstr_longlong(rt), dwChannelGroup, cb, lpb);
 140
 141     return S_OK;
 142 }
 143
 144 static HRESULT WINAPI IDirectMusicBufferImpl_ResetReadPtr(LPDIRECTMUSICBUFFER iface)
 145 {
 146     IDirectMusicBufferImpl *This = impl_from_IDirectMusicBuffer(iface);
 147
 148     FIXME("(%p): stub\n", This);
 149
 150     return S_OK;
 151 }
 152
 153 static HRESULT WINAPI IDirectMusicBufferImpl_GetNextEvent(LPDIRECTMUSICBUFFER iface, LPREFERENCE_TIME prt, LPDWORD pdwChannelGroup, LPDWORD pdwLength, LPBYTE* ppData)
 154 {
 155     IDirectMusicBufferImpl *This = impl_from_IDirectMusicBuffer(iface);
 156
 157     FIXME("(%p, %p, %p, %p, %p): stub\n", This, prt, pdwChannelGroup, pdwLength, ppData);
 158
 159     return S_OK;
 160 }
 161
 162 static HRESULT WINAPI IDirectMusicBufferImpl_GetRawBufferPtr(LPDIRECTMUSICBUFFER iface, LPBYTE* data)
 163 {
 164     IDirectMusicBufferImpl *This = impl_from_IDirectMusicBuffer(iface);
 165
 166     TRACE("(%p)->(%p)\n", iface, data);
 167
 168     if (!data)
 169         return E_POINTER;
 170
 171     *data = This->data;
 172
 173     return S_OK;
 174 }
 175
 176 static HRESULT WINAPI IDirectMusicBufferImpl_GetStartTime(LPDIRECTMUSICBUFFER iface, LPREFERENCE_TIME ref_time)
 177 {
 178     IDirectMusicBufferImpl *This = impl_from_IDirectMusicBuffer(iface);
 179
 180     TRACE("(%p)->(%p)\n", iface, ref_time);
 181
 182     if (!ref_time)
 183         return E_POINTER;
 184     if (!This->write_pos)
 185         return DMUS_E_BUFFER_EMPTY;
 186
 187     *ref_time = This->start_time;
 188
 189     return S_OK;
 190 }
 191
 192 static HRESULT WINAPI IDirectMusicBufferImpl_GetUsedBytes(LPDIRECTMUSICBUFFER iface, LPDWORD used_bytes)
 193 {
 194     IDirectMusicBufferImpl *This = impl_from_IDirectMusicBuffer(iface);
 195
 196     TRACE("(%p)->(%p)\n", iface, used_bytes);
 197
 198     if (!used_bytes)
 199         return E_POINTER;
 200
 201     *used_bytes = This->write_pos;
 202
 203     return S_OK;
 204 }
 205
 206 static HRESULT WINAPI IDirectMusicBufferImpl_GetMaxBytes(LPDIRECTMUSICBUFFER iface, LPDWORD max_bytes)
 207 {
 208     IDirectMusicBufferImpl *This = impl_from_IDirectMusicBuffer(iface);
 209
 210     TRACE("(%p)->(%p)\n", iface, max_bytes);
 211
 212     if (!max_bytes)
 213         return E_POINTER;
 214
 215     *max_bytes = This->size;
 216
 217     return S_OK;
 218 }
 219
 220 static HRESULT WINAPI IDirectMusicBufferImpl_GetBufferFormat(LPDIRECTMUSICBUFFER iface, LPGUID format)
 221 {
 222     IDirectMusicBufferImpl *This = impl_from_IDirectMusicBuffer(iface);
 223
 224     TRACE("(%p)->(%p)\n", iface, format);
 225
 226     if (!format)
 227         return E_POINTER;
 228
 229     *format = This->format;
 230     return S_OK;
 231 }
 232
 233 static HRESULT WINAPI IDirectMusicBufferImpl_SetStartTime(LPDIRECTMUSICBUFFER iface, REFERENCE_TIME ref_time)
 234 {
 235     IDirectMusicBufferImpl *This = impl_from_IDirectMusicBuffer(iface);
 236
 237     TRACE("(%p)->(0x%s)\n", This, wine_dbgstr_longlong(ref_time));
 238
 239     This->start_time = ref_time;
 240
 241     return S_OK;
 242 }
 243
 244 static HRESULT WINAPI IDirectMusicBufferImpl_SetUsedBytes (LPDIRECTMUSICBUFFER iface, DWORD cb)
 245 {
 246     IDirectMusicBufferImpl *This = impl_from_IDirectMusicBuffer(iface);
 247
 248     FIXME("(%p, %d): stub\n", This, cb);
 249
 250     return S_OK;
 251 }
 252
 253 static const IDirectMusicBufferVtbl DirectMusicBuffer_Vtbl = {
 254         IDirectMusicBufferImpl_QueryInterface,
 255         IDirectMusicBufferImpl_AddRef,
 256         IDirectMusicBufferImpl_Release,
 257         IDirectMusicBufferImpl_Flush,
 258         IDirectMusicBufferImpl_TotalTime,
 259         IDirectMusicBufferImpl_PackStructured,
 260         IDirectMusicBufferImpl_PackUnstructured,
 261         IDirectMusicBufferImpl_ResetReadPtr,
 262         IDirectMusicBufferImpl_GetNextEvent,
 263         IDirectMusicBufferImpl_GetRawBufferPtr,
 264         IDirectMusicBufferImpl_GetStartTime,
 265         IDirectMusicBufferImpl_GetUsedBytes,
 266         IDirectMusicBufferImpl_GetMaxBytes,
 267         IDirectMusicBufferImpl_GetBufferFormat,
 268         IDirectMusicBufferImpl_SetStartTime,
 269         IDirectMusicBufferImpl_SetUsedBytes
 270 };
 271
 272 HRESULT DMUSIC_CreateDirectMusicBufferImpl(LPDMUS_BUFFERDESC desc, LPVOID* ret_iface)
 273 {
 274     IDirectMusicBufferImpl* dmbuffer;
 275     HRESULT hr;
 276
 277     TRACE("(%p, %p)\n", desc, ret_iface);
 278
 279     *ret_iface = NULL;
 280
 281     dmbuffer = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDirectMusicBufferImpl));
 282     if (!dmbuffer)
 283         return E_OUTOFMEMORY;
 284
 285     dmbuffer->IDirectMusicBuffer_iface.lpVtbl = &DirectMusicBuffer_Vtbl;
 286     dmbuffer->ref = 0; /* Will be inited by QueryInterface */
 287
 288     if (IsEqualGUID(&desc->guidBufferFormat, &GUID_NULL))
 289         dmbuffer->format = KSDATAFORMAT_SUBTYPE_MIDI;
 290     else
 291         dmbuffer->format = desc->guidBufferFormat;
 292     dmbuffer->size = (desc->cbBuffer + 3) & ~3; /* Buffer size must be multiple of 4 bytes */
 293
 294     dmbuffer->data = HeapAlloc(GetProcessHeap(), 0, dmbuffer->size);
 295     if (!dmbuffer->data) {
 296         HeapFree(GetProcessHeap(), 0, dmbuffer);
 297         return E_OUTOFMEMORY;
 298     }
 299
 300     hr = IDirectMusicBufferImpl_QueryInterface((LPDIRECTMUSICBUFFER)dmbuffer, &IID_IDirectMusicBuffer, ret_iface);
 301     if (FAILED(hr))
 302     {
 303         HeapFree(GetProcessHeap(), 0, dmbuffer->data);
 304         HeapFree(GetProcessHeap(), 0, dmbuffer);
 305     }
 306
 307     return hr;
 308 }