/*
* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description: 
*
*/

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>

#include "xaseekitf.h"

#ifdef _GSTREAMER_BACKEND_
#include "XASeekItfAdaptation.h"
#include "XAPlayItfAdaptation.h"
#endif
#include "xathreadsafety.h"


/**
 * XASeekItfImpl* GetImpl(XASeekItf self)
 * Description: Validate interface pointer and cast it to implementation pointer.
 */
static XASeekItfImpl* GetImpl(XASeekItf self)
{
    if(self)
    {
        XASeekItfImpl* impl = (XASeekItfImpl*)(*self);
        if(impl && impl == impl->self)
        {
            return impl;
        }
    }
    return NULL;
}

/**
 * Base interface XASeekItf implementation
 */

/**
 * XAresult XASeekItfImpl_SetPosition(XASeekItf self, XAmillisecond pos,
 *                                    XAuint32 seekMode)
 * Description: Sets the position of the playback head.
 **/
XAresult XASeekItfImpl_SetPosition(XASeekItf self, XAmillisecond pos,
                                   XAuint32 seekMode)
{
    XAresult ret = XA_RESULT_SUCCESS;
    XAmillisecond duration = 0;
    XASeekItfImpl* impl = GetImpl(self);
    DEBUG_API("->XASeekItfImpl_SetPosition");
    XA_IMPL_THREAD_SAFETY_ENTRY( XATSMediaPlayer );

    if(!impl)
    {
        /* invalid parameter */
        XA_IMPL_THREAD_SAFETY_EXIT( XATSMediaPlayer );
        DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
        DEBUG_API("<-XASeekItfImpl_SetPosition");
        return XA_RESULT_PARAMETER_INVALID;
    }

#ifdef _GSTREAMER_BACKEND_
    /* Get duration of the content */
    if(XAPlayItfAdapt_GetDuration(impl->adapCtx, &duration) != XA_RESULT_SUCCESS)
    {
        /* invalid parameter */
        XA_IMPL_THREAD_SAFETY_EXIT( XATSMediaPlayer );
        DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
        DEBUG_API("<-XASeekItfImpl_SetPosition");
        return XA_RESULT_PARAMETER_INVALID;
    }
#endif
    
    if(pos > duration)
    {
        /* invalid parameter */
        XA_IMPL_THREAD_SAFETY_EXIT( XATSMediaPlayer );
        DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
        DEBUG_API("<-XASeekItfImpl_SetPosition");
        return XA_RESULT_PARAMETER_INVALID;
    }

    if(seekMode != XA_SEEKMODE_FAST && seekMode != XA_SEEKMODE_ACCURATE)
    {
        /* seek mode unsupported */
        XA_IMPL_THREAD_SAFETY_EXIT( XATSMediaPlayer );
        DEBUG_ERR("XA_RESULT_FEATURE_UNSUPPORTED");
        DEBUG_API("<-XASeekItfImpl_SetPosition");
        return XA_RESULT_FEATURE_UNSUPPORTED;
    }

#ifdef _GSTREAMER_BACKEND_
    ret = XASeekItfAdapt_SetPosition(impl->adapCtx, pos, seekMode);
#endif
    if(ret == XA_RESULT_SUCCESS)
    {
        impl->playbackPosition = pos;
        impl->seekMode = seekMode;
    }

    XA_IMPL_THREAD_SAFETY_EXIT( XATSMediaPlayer );
    DEBUG_API("<-XASeekItfImpl_SetPosition");
    return ret;
}

/**
 * XAresult XASeekItfImpl_SetLoop(XASeekItf self, XAboolean loopEnable,
 *                                XAmillisecond startPos, XAmillisecond endPos)
 * Description: Enables or disables looping and sets the start and end points of looping.
 **/
XAresult XASeekItfImpl_SetLoop(XASeekItf self, XAboolean loopEnable,
                               XAmillisecond startPos, XAmillisecond endPos)
{
    XAresult ret = XA_RESULT_SUCCESS;
    XAmillisecond duration = 0;
    XASeekItfImpl* impl = GetImpl(self);
    DEBUG_API_A2("->XASeekItfImpl_SetLoop, startPos:%lu, endPos:%lu", startPos, endPos);
    XA_IMPL_THREAD_SAFETY_ENTRY( XATSMediaPlayer );

    if(!impl || (startPos > endPos))
    {
        /* invalid parameter */
        XA_IMPL_THREAD_SAFETY_EXIT( XATSMediaPlayer );
        DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
        DEBUG_API("<-XASeekItfImpl_SetLoop");
        return XA_RESULT_PARAMETER_INVALID;
    }

#ifdef _GSTREAMER_BACKEND_
    /* Get duration of the content */
    if(XAPlayItfAdapt_GetDuration(impl->adapCtx, &duration) != XA_RESULT_SUCCESS)
    {
        /* invalid parameter */
        XA_IMPL_THREAD_SAFETY_EXIT( XATSMediaPlayer );
        DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
        DEBUG_API("<-XASeekItfImpl_SetLoop");
        return XA_RESULT_PARAMETER_INVALID;
    }
#endif
    if(endPos > duration && endPos != XA_TIME_UNKNOWN)
    {
        /* invalid parameter */
        XA_IMPL_THREAD_SAFETY_EXIT( XATSMediaPlayer );
        DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
        DEBUG_API("<-XASeekItfImpl_SetLoop");
        return XA_RESULT_PARAMETER_INVALID;
    }

#ifdef _GSTREAMER_BACKEND_
    ret = XASeekItfAdapt_SetLoop(impl->adapCtx, loopEnable, startPos, endPos);
#endif
    if(ret == XA_RESULT_SUCCESS)
    {
        impl->loopEnable = loopEnable;
        impl->startPos = startPos;
        impl->endPos = endPos;
    }

    XA_IMPL_THREAD_SAFETY_EXIT( XATSMediaPlayer );
    DEBUG_API("<-XASeekItfImpl_SetLoop");
    return ret;
}

/**
 * XAresult XASeekItfImpl_GetLoop(XASeekItf self, XAboolean *pLoopEnabled,
 *                                XAmillisecond *pStartPos,
 *                                XAmillisecond *pEndPos)
 * Description: Queries whether looping is enabled or disabled, and retrieves loop points.
 **/
XAresult XASeekItfImpl_GetLoop(XASeekItf self, XAboolean *pLoopEnabled,
                               XAmillisecond *pStartPos,
                               XAmillisecond *pEndPos)
{
    XAresult ret = XA_RESULT_SUCCESS;

    XASeekItfImpl* impl = GetImpl(self);
    DEBUG_API("->XASeekItfImpl_GetLoop");

    if(!impl || !pLoopEnabled || !pStartPos || !pEndPos)
    {
        DEBUG_ERR("XA_RESULT_PARAMETER_INVALID");
        DEBUG_API("<-XASeekItfImpl_GetLoop");
        /* invalid parameter */
        return XA_RESULT_PARAMETER_INVALID;
    }

    *pLoopEnabled = impl->loopEnable;
    *pStartPos = impl->startPos;
    *pEndPos = impl->endPos;

    DEBUG_API("<-XASeekItfImpl_GetLoop");
    return ret;
}

/**
 * XASeekItfImpl -specific methods
 **/
#ifdef _GSTREAMER_BACKEND_

/**
 * XASeekItfImpl* XASeekItfImpl_Create()
 * Description: Allocate and initialize SeekItfImpl.
 **/
XASeekItfImpl* XASeekItfImpl_Create( XAAdaptationBaseCtx *adapCtx )
{
    XASeekItfImpl *self = (XASeekItfImpl*)
        calloc(1,sizeof(XASeekItfImpl));
    DEBUG_API("->XASeekItfImpl_Create");
    if(self)
    {
        /* init itf default implementation */
        self->itf.GetLoop = XASeekItfImpl_GetLoop;
        self->itf.SetLoop = XASeekItfImpl_SetLoop;
        self->itf.SetPosition = XASeekItfImpl_SetPosition;

        /* init variables */
        self->playbackPosition = 0;
        self->seekMode = 0;
        self->loopEnable = XA_BOOLEAN_FALSE;
        self->startPos = 0;
        self->endPos = 0;

        self->adapCtx = adapCtx;

        self->self = self;
    }
    DEBUG_API("<-XASeekItfImpl_Create");
    return self;
}
#endif
/**
 * void XASeekItfImpl_Free(XASeekItfImpl* self)
 * Description: Free all resources reserved at XASeekItfImpl_Create.
 **/
void XASeekItfImpl_Free(XASeekItfImpl* self)
{
    DEBUG_API("->XASeekItfImpl_Free");
    assert(self==self->self);
    free(self);
    DEBUG_API("<-XASeekItfImpl_Free");
}