loader/dmo/buffer.c

   1 #include "DMO_Filter.h"
   2
   3 #include "loader/wine/winerror.h"
   4 #include "loader/wine/windef.h"
   5
   6 #include <stdio.h>
   7 #include <string.h>
   8 #include <stdlib.h>
   9
  10 struct CMediaBuffer
  11 {
  12     IMediaBuffer_vt* vt;
  13     DECLARE_IUNKNOWN();
  14     GUID interfaces[2];
  15     void* mem;
  16     unsigned long len;
  17     unsigned long maxlen;
  18     int freemem;
  19 };
  20
  21 static HRESULT STDCALL CMediaBuffer_SetLength(IMediaBuffer* This,
  22                                               unsigned long cbLength)
  23 {
  24     CMediaBuffer* cmb = (CMediaBuffer*) This;
  25     Debug printf("CMediaBuffer_SetLength(%p) called (%ld, %ld)\n", This, cbLength, cmb->maxlen);
  26     if (cbLength > cmb->maxlen)
  27         return E_INVALIDARG;
  28     cmb->len = cbLength;
  29     return S_OK;
  30 }
  31
  32 static HRESULT STDCALL CMediaBuffer_GetMaxLength(IMediaBuffer* This,
  33                                                  /* [out] */ unsigned long *pcbMaxLength)
  34 {
  35     CMediaBuffer* cmb = (CMediaBuffer*) This;
  36     Debug printf("CMediaBuffer_GetMaxLength(%p) called -> %ld\n", This, cmb->maxlen);
  37     if (!pcbMaxLength)
  38         return E_POINTER;
  39     *pcbMaxLength = cmb->maxlen;
  40     return S_OK;
  41 }
  42
  43 static HRESULT STDCALL CMediaBuffer_GetBufferAndLength(IMediaBuffer* This,
  44                                                        /* [out] */ char** ppBuffer,
  45                                                        /* [out] */ unsigned long* pcbLength)
  46 {
  47     CMediaBuffer* cmb = (CMediaBuffer*) This;
  48     Debug printf("CMediaBuffer_GetBufferAndLength(%p) called -> %p %ld\n", This, cmb->mem, cmb->len);
  49     if (!ppBuffer && !pcbLength)
  50         return E_POINTER;
  51     if (ppBuffer)
  52         *ppBuffer = cmb->mem;
  53     if (pcbLength)
  54         *pcbLength = cmb->len;
  55     return S_OK;
  56 }
  57
  58 static void CMediaBuffer_Destroy(CMediaBuffer* This)
  59 {
  60     Debug printf("CMediaBuffer_Destroy(%p) called\n", This);
  61     if (This->freemem)
  62         free(This->mem);
  63     free(This->vt);
  64     free(This);
  65 }
  66
  67 IMPLEMENT_IUNKNOWN(CMediaBuffer)
  68
  69 CMediaBuffer* CMediaBufferCreate(unsigned long maxlen, void* mem,
  70                                  unsigned long len, int copy)
  71 {
  72     CMediaBuffer* This = malloc(sizeof(CMediaBuffer));
  73
  74     if (!This)
  75         return NULL;
  76
  77     This->vt = malloc(sizeof(IMediaBuffer_vt));
  78     if (!This->vt)
  79     {
  80         CMediaBuffer_Destroy(This);
  81         return NULL;
  82     }
  83
  84     This->refcount = 1;
  85     This->len = len;
  86     This->maxlen = maxlen;
  87     This->freemem = 0;
  88     This->mem = mem;
  89     if (copy)
  90         /* make a private copy of data */
  91         This->mem = 0;
  92     if (This->mem == NULL)
  93     {
  94         if (This->maxlen)
  95         {
  96             This->mem = malloc(This->maxlen);
  97             if (!This->mem)
  98             {
  99                 CMediaBuffer_Destroy(This);
 100                 return NULL;
 101             }
 102             This->freemem = 1;
 103             if (copy)
 104                 memcpy(This->mem, mem, This->len);
 105         }
 106     }
 107     This->vt->QueryInterface = CMediaBuffer_QueryInterface;
 108     This->vt->AddRef = CMediaBuffer_AddRef;
 109     This->vt->Release = CMediaBuffer_Release;
 110
 111     This->vt->SetLength = CMediaBuffer_SetLength;
 112     This->vt->GetMaxLength = CMediaBuffer_GetMaxLength;
 113     This->vt->GetBufferAndLength = CMediaBuffer_GetBufferAndLength;
 114
 115     This->interfaces[0] = IID_IUnknown;
 116     This->interfaces[1] = IID_IMediaBuffer;
 117
 118     return This;
 119 }