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Sweden-Number/dlls/dmusic/instrument.c

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/*
* IDirectMusicInstrument Implementation
*
* Copyright (C) 2003-2004 Rok Mandeljc
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "dmusic_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(dmusic);
static const GUID IID_IDirectMusicInstrumentPRIVATE = { 0xbcb20080, 0xa40c, 0x11d1, { 0x86, 0xbc, 0x00, 0xc0, 0x4f, 0xbf, 0x8f, 0xef } };
/* IDirectMusicInstrument IUnknown part: */
static HRESULT WINAPI IDirectMusicInstrumentImpl_QueryInterface(LPDIRECTMUSICINSTRUMENT iface, REFIID riid, LPVOID *ret_iface)
{
TRACE("(%p)->(%s, %p)\n", iface, debugstr_dmguid(riid), ret_iface);
if (IsEqualIID(riid, &IID_IUnknown) ||
IsEqualIID(riid, &IID_IDirectMusicInstrument))
{
*ret_iface = iface;
IDirectMusicInstrument_AddRef(iface);
return S_OK;
}
else if (IsEqualIID(riid, &IID_IDirectMusicInstrumentPRIVATE))
{
/* it seems to me that this interface is only basic IUnknown, without any
* other inherited functions... *sigh* this is the worst scenario, since it means
* that whoever calls it knows the layout of original implementation table and therefore
* tries to get data by direct access... expect crashes
*/
FIXME("*sigh*... requested private/unspecified interface\n");
*ret_iface = iface;
IDirectMusicInstrument_AddRef(iface);
return S_OK;
}
WARN("(%p)->(%s, %p): not found\n", iface, debugstr_dmguid(riid), ret_iface);
return E_NOINTERFACE;
}
static ULONG WINAPI IDirectMusicInstrumentImpl_AddRef(LPDIRECTMUSICINSTRUMENT iface)
{
IDirectMusicInstrumentImpl *This = impl_from_IDirectMusicInstrument(iface);
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p)->(): new ref = %u\n", iface, ref);
DMUSIC_LockModule();
return ref;
}
static ULONG WINAPI IDirectMusicInstrumentImpl_Release(LPDIRECTMUSICINSTRUMENT iface)
{
IDirectMusicInstrumentImpl *This = impl_from_IDirectMusicInstrument(iface);
ULONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p)->(): new ref = %u\n", iface, ref);
if (!ref)
HeapFree(GetProcessHeap(), 0, This);
DMUSIC_UnlockModule();
return ref;
}
/* IDirectMusicInstrumentImpl IDirectMusicInstrument part: */
static HRESULT WINAPI IDirectMusicInstrumentImpl_GetPatch(LPDIRECTMUSICINSTRUMENT iface, DWORD* pdwPatch)
{
IDirectMusicInstrumentImpl *This = impl_from_IDirectMusicInstrument(iface);
TRACE("(%p)->(%p)\n", This, pdwPatch);
*pdwPatch = MIDILOCALE2Patch(&This->pHeader->Locale);
return S_OK;
}
static HRESULT WINAPI IDirectMusicInstrumentImpl_SetPatch(LPDIRECTMUSICINSTRUMENT iface, DWORD dwPatch)
{
IDirectMusicInstrumentImpl *This = impl_from_IDirectMusicInstrument(iface);
TRACE("(%p)->(%d): stub\n", This, dwPatch);
Patch2MIDILOCALE(dwPatch, &This->pHeader->Locale);
return S_OK;
}
static const IDirectMusicInstrumentVtbl DirectMusicInstrument_Vtbl =
{
IDirectMusicInstrumentImpl_QueryInterface,
IDirectMusicInstrumentImpl_AddRef,
IDirectMusicInstrumentImpl_Release,
IDirectMusicInstrumentImpl_GetPatch,
IDirectMusicInstrumentImpl_SetPatch
};
/* for ClassFactory */
HRESULT DMUSIC_CreateDirectMusicInstrumentImpl (LPCGUID lpcGUID, LPVOID* ppobj, LPUNKNOWN pUnkOuter) {
IDirectMusicInstrumentImpl* dminst;
dminst = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDirectMusicInstrumentImpl));
if (NULL == dminst) {
*ppobj = NULL;
return E_OUTOFMEMORY;
}
dminst->IDirectMusicInstrument_iface.lpVtbl = &DirectMusicInstrument_Vtbl;
dminst->ref = 0; /* will be inited by QueryInterface */
return IDirectMusicInstrument_QueryInterface(&dminst->IDirectMusicInstrument_iface, lpcGUID, ppobj);
}
static HRESULT read_from_stream(IStream *stream, void *data, ULONG size)
{
ULONG bytes_read;
HRESULT hr;
hr = IStream_Read(stream, data, size, &bytes_read);
if(FAILED(hr)){
TRACE("IStream_Read failed: %08x\n", hr);
return hr;
}
if (bytes_read < size) {
TRACE("Didn't read full chunk: %u < %u\n", bytes_read, size);
return E_FAIL;
}
return S_OK;
}
static inline DWORD subtract_bytes(DWORD len, DWORD bytes)
{
if(bytes > len){
TRACE("Apparent mismatch in chunk lengths? %u bytes remaining, %u bytes read\n", len, bytes);
return 0;
}
return len - bytes;
}
static HRESULT load_instrument(IDirectMusicInstrumentImpl *This, IStream *stream, DWORD length)
{
HRESULT hr;
FOURCC fourcc;
DWORD bytes;
LARGE_INTEGER move;
while(length){
hr = read_from_stream(stream, &fourcc, sizeof(fourcc));
if(FAILED(hr))
return hr;
hr = read_from_stream(stream, &bytes, sizeof(bytes));
if(FAILED(hr))
return hr;
length = subtract_bytes(length, sizeof(fourcc) + sizeof(bytes));
switch(fourcc){
case FOURCC_INSH:
TRACE("INSH chunk: %u bytes\n", bytes);
hr = read_from_stream(stream, This->pHeader, sizeof(*This->pHeader));
if(FAILED(hr))
return hr;
move.QuadPart = bytes - sizeof(*This->pHeader);
hr = IStream_Seek(stream, move, STREAM_SEEK_CUR, NULL);
if(FAILED(hr)){
WARN("IStream_Seek failed: %08x\n", hr);
return hr;
}
length = subtract_bytes(length, bytes);
break;
case FOURCC_DLID:
TRACE("DLID chunk: %u bytes\n", bytes);
hr = read_from_stream(stream, This->pInstrumentID, sizeof(*This->pInstrumentID));
if(FAILED(hr))
return hr;
move.QuadPart = bytes - sizeof(*This->pInstrumentID);
hr = IStream_Seek(stream, move, STREAM_SEEK_CUR, NULL);
if(FAILED(hr)){
WARN("IStream_Seek failed: %08x\n", hr);
return hr;
}
length = subtract_bytes(length, bytes);
break;
default:
TRACE("Unknown chunk %s: %u bytes\n", debugstr_fourcc(fourcc), bytes);
move.QuadPart = bytes;
hr = IStream_Seek(stream, move, STREAM_SEEK_CUR, NULL);
if(FAILED(hr)){
WARN("IStream_Seek failed: %08x\n", hr);
return hr;
}
length = subtract_bytes(length, bytes);
break;
}
}
return S_OK;
}
/* aux. function that completely loads instrument; my tests indicate that it's
called somewhere around IDirectMusicCollection_GetInstrument */
HRESULT IDirectMusicInstrumentImpl_Custom_Load(LPDIRECTMUSICINSTRUMENT iface, LPSTREAM stream)
{
IDirectMusicInstrumentImpl *This = impl_from_IDirectMusicInstrument(iface);
LARGE_INTEGER move;
FOURCC fourcc;
DWORD bytes;
HRESULT hr;
TRACE("(%p, %p, offset = %s)\n", This, stream, wine_dbgstr_longlong(This->liInstrumentPosition.QuadPart));
hr = IStream_Seek(stream, This->liInstrumentPosition, STREAM_SEEK_SET, NULL);
if(FAILED(hr)){
WARN("IStream_Seek failed: %08x\n", hr);
goto load_failure;
}
hr = read_from_stream(stream, &fourcc, sizeof(fourcc));
if(FAILED(hr))
goto load_failure;
if(fourcc != FOURCC_LIST){
WARN("Loading failed: Expected LIST chunk, got: %s\n", debugstr_fourcc(fourcc));
goto load_failure;
}
hr = read_from_stream(stream, &bytes, sizeof(bytes));
if(FAILED(hr))
goto load_failure;
TRACE("LIST chunk: %u bytes\n", bytes);
while(1){
hr = read_from_stream(stream, &fourcc, sizeof(fourcc));
if(FAILED(hr))
goto load_failure;
switch(fourcc){
case FOURCC_INS:
TRACE("INS chunk: (no byte count)\n");
hr = load_instrument(This, stream, bytes - sizeof(FOURCC));
if(FAILED(hr))
goto load_failure;
break;
default:
hr = read_from_stream(stream, &bytes, sizeof(bytes));
if(FAILED(hr))
goto load_failure;
TRACE("Unknown chunk %s: %u bytes\n", debugstr_fourcc(fourcc), bytes);
move.QuadPart = bytes;
hr = IStream_Seek(stream, move, STREAM_SEEK_CUR, NULL);
if(FAILED(hr)){
WARN("IStream_Seek failed: %08x\n", hr);
return hr;
}
break;
}
}
return S_OK;
load_failure:
return DMUS_E_UNSUPPORTED_STREAM;
}
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