cmediasample.c

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/*
 * Modified for use with MPlayer, detailed changelog at
 * http://svn.mplayerhq.hu/mplayer/trunk/
 * $Id: cmediasample.c,v 1.2 2008/03/03 08:11:38 dsqiu Exp $
 */

#include "cmediasample.h"
#include "mediatype.h"
#include "wine/winerror.h"
#include <mplaylib.h>
#include <mplaylib.h>
#include <mplaylib.h>

/*
 * currently hack to make some extra room for DS Acel codec which
 * seems to overwrite allocated memory - FIXME better later
 * check the buffer allocation
 */
static const int SAFETY_ACEL = 1024;

/**
 * \brief IPin::QueryInternalConnections (retries pin's internal connections)
 *
 * \param[in]     This  pointer to IPin interface
 * \param[out]    apPin Array that receives pins, internally connected to this
 * \param[in,out] nPint Size of an array
 *
 * \return S_OK - success
 * \return S_FALSE - pin rejects media type
 * \return E_NOTIMPL - not implemented
 *
 */
static long STDCALL CMediaSample_QueryInterface(IUnknown* This,
						/* [in] */ const GUID* iid,
						/* [iid_is][out] */ void **ppv)
{
    Debug printf("CMediaSample_QueryInterface(%p) called\n", This);
    if (!ppv)
	return E_INVALIDARG;
    if (memcmp(iid, &IID_IUnknown, sizeof(*iid)) == 0)
    {
	*ppv = (void*)This;
	((IMediaSample*) This)->vt->AddRef(This);
	return 0;
    }
    if (memcmp(iid, &IID_IMediaSample, sizeof(*iid)) == 0)
    {
	*ppv = (void*)This;
	((IMediaSample*) This)->vt->AddRef(This);
	return 0;
    }
    return E_NOINTERFACE;
}

/**
 * \brief IUnknown::AddRef (increases reference counter for interface)
 *
 * \param[in]  This pointer to IUnknown class
 *
 * \return new value of reference counter
 *
 * \remarks
 * Return value should be used only for debug purposes
 *
 */
static long STDCALL CMediaSample_AddRef(IUnknown* This)
{
    Debug printf("CMediaSample_AddRef(%p) called\n", This);
    ((CMediaSample*)This)->refcount++;
    return 0;
}

/**
 * \brief CMediaSample destructor
 *
 * \param[in] This pointer to CMediaSample object
 *
 */
void CMediaSample_Destroy(CMediaSample* This)
{

    Debug printf("CMediaSample_Destroy(%p) called (ref:%d)\n", This, This->refcount);
    free(This->vt);
    free(This->own_block);
    if(((CMediaSample*)This)->type_valid)
	FreeMediaType(&(This->media_type));
    free(This);
}

/**
 * \brief IUnknown::Release (desreases reference counter for interface)
 *
 * \param[in]  This pointer to IUnknown class
 *
 * \return new value of reference counter
 *
 * \remarks
 * When reference counter reaches zero calls destructor
 * Return value should be used only for debug purposes
 *
 */
static long STDCALL CMediaSample_Release(IUnknown* This)
{
    CMediaSample* parent = (CMediaSample*)This;
    Debug printf("CMediaSample_Release(%p) called  (new ref:%d)\n",
		 This, ((CMediaSample*)This)->refcount-1);

    if (--((CMediaSample*) This)->refcount == 0)
    {
	parent->all->vt->ReleaseBuffer((IMemAllocator*)(parent->all),
				       (IMediaSample*)This);
    }
    return 0;
}

/**
 * \brief IMediaSample::GetPointer (retrieves a read/write pointer to the media sample's buffer)
 *
 * \param[in] This pointer to CMediaSample object
 * \param[out] address of variable that receives pointer to sample's buffer
 *
 * \return S_OK success
 * \return apropriate error otherwise 
 *
 * \note The calles should not free or reallocate buffer
 *
 */
static HRESULT STDCALL CMediaSample_GetPointer(IMediaSample* This,
					       /* [out] */ BYTE** ppBuffer)
{
    Debug printf("CMediaSample_GetPointer(%p) called -> %p, size: %d  %d\n", This, ((CMediaSample*) This)->block, ((CMediaSample*)This)->actual_size, ((CMediaSample*)This)->size);
    if (!ppBuffer)
	return E_INVALIDARG;
    *ppBuffer = (BYTE*) ((CMediaSample*) This)->block;
    return 0;
}

/**
 * \brief IMediaSample::GetSize (retrieves a size of buffer in bytes)
 *
 * \param[in] This pointer to CMediaSample object
 *
 * \return size of buffer in bytes
 *
 */
static long STDCALL CMediaSample_GetSize(IMediaSample * This)
{
    Debug printf("CMediaSample_GetSize(%p) called -> %d\n", This, ((CMediaSample*) This)->size);
    return ((CMediaSample*) This)->size;
}

/**
 * \brief IMediaSample::GetTime (retrieves a stream time at wich sample sould start and finish)
 *
 * \param[in] This pointer to CMediaSample object
 * \param[out] pTimeStart pointer to variable that receives start time
 * \param[out] pTimeEnd pointer to variable that receives end time
 *
 * \return S_OK success
 * \return VFW_E_NO_STOP_TIME The sample has valid start time, but no stop time
 * \return VFW_E_SAMPLE_TIME_NOT_SET The sample is not time-stamped 
 *
 * \remarks
 * Both values are relative to stream time
 *
 */
static HRESULT STDCALL CMediaSample_GetTime(IMediaSample * This,
					    /* [out] */ REFERENCE_TIME *pTimeStart,
					    /* [out] */ REFERENCE_TIME *pTimeEnd)
{
    Debug printf("CMediaSample_GetTime(%p) called (UNIMPLEMENTED)\n", This);
    return E_NOTIMPL;
}

/**
 * \brief IMediaSample::SetTime (sets a stream time at wich sample sould start and finish)
 *
 * \param[in] This pointer to CMediaSample object
 * \param[out] pTimeStart pointer to variable that contains start time
 * \param[out] pTimeEnd pointer to variable that contains end time
 *
 * \return S_OK success
 * \return apropriate error otherwise
 *
 * \remarks
 * Both values are relative to stream time
 * To invalidate the stream times set pTimeStart and pTimeEnd to NULL. this will cause
 * IMEdiaSample::GetTime to return VFW_E_SAMPLE_TIME_NOT_SET
 *
 */
static HRESULT STDCALL CMediaSample_SetTime(IMediaSample * This,
					    /* [in] */ REFERENCE_TIME *pTimeStart,
					    /* [in] */ REFERENCE_TIME *pTimeEnd)
{
    Debug printf("CMediaSample_SetTime(%p) called (UNIMPLEMENTED)\n", This);
    return E_NOTIMPL;
}

/**
 * \brief IMediaSample::IsSyncPoint (determines if start of this sample is sync point)
 *
 * \param[in] This pointer to CMediaSample object
 *
 * \return S_OK start of this sample is sync point
 * \return S_FALSE start of this sample is not sync point
 *
 * \remarks
 * If bTemporalCompression of AM_MEDIA_TYPE is FALSE, all samples are sync points.
 *
 */
static HRESULT STDCALL CMediaSample_IsSyncPoint(IMediaSample * This)
{
    Debug printf("CMediaSample_IsSyncPoint(%p) called\n", This);
    if (((CMediaSample*)This)->isSyncPoint)
	return 0;
    return 1;
}

/**
 * \brief IMediaSample::SetSyncPoint (specifies if start of this sample is sync point)
 *
 * \param[in] This pointer to CMediaSample object
 * \param[in] bIsSyncPoint specifies whether this is sync point or not
 *
 * \return S_OK success
 * \return apropriate error code otherwise
 *
 */
static HRESULT STDCALL CMediaSample_SetSyncPoint(IMediaSample * This,
						 long bIsSyncPoint)
{
    Debug printf("CMediaSample_SetSyncPoint(%p) called\n", This);
    ((CMediaSample*)This)->isSyncPoint = bIsSyncPoint;
    return 0;
}

/**
 * \brief IMediaSample::IsPreroll (determines if this sample is preroll sample)
 *
 * \param[in] This pointer to CMediaSample object
 *
 * \return S_OK if this sample is preroll sample
 * \return S_FALSE if this sample is not preroll sample
 *
 * \remarks
 * Preroll samples are processed but  not displayed. They are lokated in media stream
 * before displayable samples.
 *
 */
static HRESULT STDCALL CMediaSample_IsPreroll(IMediaSample * This)
{
    Debug printf("CMediaSample_IsPreroll(%p) called\n", This);

    if (((CMediaSample*)This)->isPreroll)
	return 0;//S_OK

    return 1;//S_FALSE
}

/**
 * \brief IMediaSample::SetPreroll (specifies if this sample is preroll sample)
 *
 * \param[in] This pointer to CMediaSample object
 * \param[in] bIsPreroll specifies whether this sample is preroll sample or not
 *
 * \return S_OK success
 * \return apropriate error code otherwise
 *
 * \remarks
 * Preroll samples are processed but  not displayed. They are lokated in media stream
 * before displayable samples.
 *
 */
static HRESULT STDCALL CMediaSample_SetPreroll(IMediaSample * This,
					       long bIsPreroll)
{
    Debug printf("CMediaSample_SetPreroll(%p) called\n", This);
    ((CMediaSample*)This)->isPreroll=bIsPreroll;
    return 0;
}

/**
 * \brief IMediaSample::GetActualDataLength (retrieves the length of valid data in the buffer)
 *
 * \param[in] This pointer to CMediaSample object
 *
 * \return length of valid data in buffer in bytes
 *
 */