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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->regions);
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->header.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->header.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 inline HRESULT advance_stream(IStream *stream, ULONG bytes)
{
LARGE_INTEGER move;
HRESULT ret;
move.QuadPart = bytes;
ret = IStream_Seek(stream, move, STREAM_SEEK_CUR, NULL);
if (FAILED(ret))
WARN("IStream_Seek failed: %08x\n", ret);
return ret;
}
static HRESULT load_region(IDirectMusicInstrumentImpl *This, IStream *stream, instrument_region *region, ULONG length)
{
HRESULT ret;
DMUS_PRIVATE_CHUNK chunk;
TRACE("(%p, %p, %p, %u)\n", This, stream, region, length);
while (length)
{
ret = read_from_stream(stream, &chunk, sizeof(chunk));
if (FAILED(ret))
return ret;
length = subtract_bytes(length, sizeof(chunk));
switch (chunk.fccID)
{
case FOURCC_RGNH:
TRACE("RGNH chunk (region header): %u bytes\n", chunk.dwSize);
ret = read_from_stream(stream, &region->header, sizeof(region->header));
if (FAILED(ret))
return ret;
length = subtract_bytes(length, sizeof(region->header));
break;
case FOURCC_WSMP:
TRACE("WSMP chunk (wave sample): %u bytes\n", chunk.dwSize);
ret = read_from_stream(stream, &region->wave_sample, sizeof(region->wave_sample));
if (FAILED(ret))
return ret;
length = subtract_bytes(length, sizeof(region->wave_sample));
if (!(region->loop_present = (chunk.dwSize != sizeof(region->wave_sample))))
break;
ret = read_from_stream(stream, &region->wave_loop, sizeof(region->wave_loop));
if (FAILED(ret))
return ret;
length = subtract_bytes(length, sizeof(region->wave_loop));
break;
case FOURCC_WLNK:
TRACE("WLNK chunk (wave link): %u bytes\n", chunk.dwSize);
ret = read_from_stream(stream, &region->wave_link, sizeof(region->wave_link));
if (FAILED(ret))
return ret;
length = subtract_bytes(length, sizeof(region->wave_link));
break;
default:
TRACE("Unknown chunk %s (skipping): %u bytes\n", debugstr_fourcc(chunk.fccID), chunk.dwSize);
ret = advance_stream(stream, chunk.dwSize);
if (FAILED(ret))
return ret;
length = subtract_bytes(length, chunk.dwSize);
break;
}
}
return S_OK;
}
/* Function that loads all instrument data and which is called from IDirectMusicCollection_GetInstrument as in native */
HRESULT IDirectMusicInstrumentImpl_CustomLoad(IDirectMusicInstrument *iface, IStream *stream)
{
IDirectMusicInstrumentImpl *This = impl_from_IDirectMusicInstrument(iface);
HRESULT hr;
DMUS_PRIVATE_CHUNK chunk;
ULONG i = 0;
ULONG length = This->length;
TRACE("(%p, %p): offset = 0x%s, length = %u)\n", This, stream, wine_dbgstr_longlong(This->liInstrumentPosition.QuadPart), This->length);
if (This->loaded)
return S_OK;
hr = IStream_Seek(stream, This->liInstrumentPosition, STREAM_SEEK_SET, NULL);
if (FAILED(hr))
{
WARN("IStream_Seek failed: %08x\n", hr);
return DMUS_E_UNSUPPORTED_STREAM;
}
This->regions = HeapAlloc(GetProcessHeap(), 0, sizeof(*This->regions) * This->header.cRegions);
if (!This->regions)
return E_OUTOFMEMORY;
while (length)
{
hr = read_from_stream(stream, &chunk, sizeof(chunk));
if (FAILED(hr))
goto error;
length = subtract_bytes(length, sizeof(chunk) + chunk.dwSize);
switch (chunk.fccID)
{
case FOURCC_INSH:
case FOURCC_DLID:
TRACE("Chunk %s: %u bytes\n", debugstr_fourcc(chunk.fccID), chunk.dwSize);
/* Instrument header and id are already set so just skip */
hr = advance_stream(stream, chunk.dwSize);
if (FAILED(hr))
goto error;
break;
case FOURCC_LIST: {
DWORD size = chunk.dwSize;
TRACE("LIST chunk: %u bytes\n", chunk.dwSize);
hr = read_from_stream(stream, &chunk.fccID, sizeof(chunk.fccID));
if (FAILED(hr))
goto error;
size = subtract_bytes(size, sizeof(chunk.fccID));
switch (chunk.fccID)
{
case FOURCC_LRGN:
TRACE("LRGN chunk (regions list): %u bytes\n", size);
while (size)
{
hr = read_from_stream(stream, &chunk, sizeof(chunk));
if (FAILED(hr))
goto error;
if (chunk.fccID != FOURCC_LIST)
{
TRACE("Unknown chunk %s: %u bytes\n", debugstr_fourcc(chunk.fccID), chunk.dwSize);
goto error;
}
hr = read_from_stream(stream, &chunk.fccID, sizeof(chunk.fccID));
if (FAILED(hr))
goto error;
if (chunk.fccID == FOURCC_RGN)
{
TRACE("RGN chunk (region list): %u bytes\n", chunk.dwSize);
hr = load_region(This, stream, &This->regions[i++], chunk.dwSize - sizeof(chunk.fccID));
}
else
{
TRACE("Unknown chunk %s: %u bytes\n", debugstr_fourcc(chunk.fccID), chunk.dwSize);
hr = advance_stream(stream, chunk.dwSize - sizeof(chunk.fccID));
}
if (FAILED(hr))
goto error;
size = subtract_bytes(size, chunk.dwSize + sizeof(chunk));
}
break;
default:
TRACE("Unknown chunk %s: %u bytes\n", debugstr_fourcc(chunk.fccID), chunk.dwSize);
hr = advance_stream(stream, chunk.dwSize - sizeof(chunk.fccID));
if (FAILED(hr))
goto error;
size = subtract_bytes(size, chunk.dwSize - sizeof(chunk.fccID));
break;
}
break;
}
default:
TRACE("Unknown chunk %s: %u bytes\n", debugstr_fourcc(chunk.fccID), chunk.dwSize);
hr = advance_stream(stream, chunk.dwSize);
if (FAILED(hr))
goto error;
break;
}
}
This->loaded = TRUE;
return S_OK;
error:
HeapFree(GetProcessHeap(), 0, This->regions);
This->regions = NULL;
return DMUS_E_UNSUPPORTED_STREAM;
}
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