/*

* Copyright (c) 2002-2007 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:  This class implements FramePositioningControl for video player

*

*/

//  INCLUDE FILES

#include <jdebug.h>

#include <e32base.h>

#include <e32math.h>

#include "cmmavideoframepositioningcontrol.h"

namespace

{

const TInt32 KMMAFramePosMicroSecMultiplier = 1000000;

}

CMMAVideoFramePositioningControl*

CMMAVideoFramePositioningControl::NewL(CMMAVideoPlayer* aPlayer)

{

    CMMAVideoFramePositioningControl* self =

        new(ELeave) CMMAVideoFramePositioningControl(aPlayer);

    return self;

}

CMMAVideoFramePositioningControl::

CMMAVideoFramePositioningControl(CMMAVideoPlayer* aPlayer)

        : CMMAFramePositioningControl(aPlayer), iPlayer(aPlayer)

{

    DEBUG("MMA:CMMAVideoFramePositioningControl::CMMAVideoFramePositioningControl");

}

CMMAVideoFramePositioningControl::~CMMAVideoFramePositioningControl()

{

    DEBUG("MMA:CMMAVideoFramePositioningControl::~CMMAVideoFramePositioningControl");

}

TInt CMMAVideoFramePositioningControl::SeekL(TInt aFrameNumber)

{

    DEBUG_INT("CMMAVideoFramePositioningControl::SeekL, aFrameNumber: %d", aFrameNumber);

    RMMFController& controller = iPlayer->Controller();

    // Controller is paused before changing position to increase

    // accuracy

    TBool playerStarted = EFalse;

    if (iPlayer->State() == CMMAPlayer::EStarted)

    {

        playerStarted = ETrue;

    }

    if (playerStarted)

    {

        User::LeaveIfError(controller.Pause());

    }

    // Frame number must be positive

    TInt frameNumber = aFrameNumber;

    if (frameNumber < 0)

    {

        frameNumber = 0;

    }

    // Find out framerate of video

    TReal32 frameRate = 0;

    GetAndCheckFrameRateL(frameRate);

    // Calculate new media time

    TReal tempReal = ((TReal32)frameNumber *

                      KMMAFramePosMicroSecMultiplier) / frameRate;

    User::LeaveIfError(Math::Round(tempReal, tempReal, 0));

    TInt64 newMediaTime = tempReal;

    // New media time is clamped to duration

    TInt err = ClampMediaTime(newMediaTime);

    // Clamp fails if duration of content is not known.

    // Two additional resorts are (in preferred order):

    // 1) Return current frame position if it can be calculated.

    // 2) Or seek to 0.

    // First resort

    if (err != KErrNone)

    {

        iPlayer->GetMediaTime(&newMediaTime);

        // Second resort

        if (newMediaTime < 0)

        {

            newMediaTime = 0;

        }

    }

    iPlayer->SetMediaTimeL(&newMediaTime);

    // Error condition

    if (newMediaTime < KErrNotFound)

    {

        User::Leave(KErrNotFound);

    }

    // Calculate actually set frame number

    tempReal = (((TReal32)newMediaTime / KMMAFramePosMicroSecMultiplier) *

                (TReal32) frameRate);

    User::LeaveIfError(Math::Round(tempReal, tempReal, 0));

    // Restart controller

    if (playerStarted)

    {

        User::LeaveIfError(controller.Play());

    }

    return tempReal;

}

TInt CMMAVideoFramePositioningControl::SkipL(TInt aFramesToSkip)

{

    DEBUG_INT("CMMAVideoFramePositioningControl::SkipL, aFramesToSkip: %d", aFramesToSkip);

    RMMFController& controller = iPlayer->Controller();

    // Controller is paused before changing position to increase

    // accuracy

    TBool playerStarted = EFalse;

    if (iPlayer->State() == CMMAPlayer::EStarted)

    {

        playerStarted = ETrue;

    }

    if (playerStarted)

    {

        User::LeaveIfError(controller.Pause());

    }

    // Find out framerate of video

    TReal32 frameRate = 0;

    GetAndCheckFrameRateL(frameRate);

    // Find out current media time

    TInt64 currentMediaTime = 0;

    iPlayer->GetMediaTime(&currentMediaTime);

    // Error condition

    if (currentMediaTime < KErrNone)

    {

        User::Leave(KErrNotFound);

    }

    // Find out current frame number

    TReal tempReal =

        ((TReal32) currentMediaTime / KMMAFramePosMicroSecMultiplier) *

        frameRate;

    User::LeaveIfError(Math::Round(tempReal, tempReal, 0));

    TInt currentFrameNumber = tempReal;

    // Calculate new media time

    TInt64 newMediaTime = currentMediaTime +

                          (((TReal32) aFramesToSkip / frameRate) * KMMAFramePosMicroSecMultiplier);

    // New media time is clamped to duration

    TInt err = ClampMediaTime(newMediaTime);

    // If clamping fails, no frames are skipped

    TInt framesSkipped = 0;

    if (err == KErrNone)

    {

        iPlayer->SetMediaTimeL(&newMediaTime);

        // Error condition

        if (newMediaTime < KErrNone)

        {

            User::Leave(KErrNotFound);

        }

        // Calculate actual amount of frames skipped

        tempReal = ((((TReal32) newMediaTime / KMMAFramePosMicroSecMultiplier) *

                     (TReal32) frameRate) - currentFrameNumber);

        User::LeaveIfError(Math::Round(tempReal, tempReal, 0));

        framesSkipped = tempReal;

    }

    // Restart controller

    if (playerStarted)

    {

        User::LeaveIfError(controller.Play());

    }

    return framesSkipped;

}

void CMMAVideoFramePositioningControl::MapFrameToTimeL(TInt aFrameNumber, TInt64* aMediaTime)

{

    DEBUG_INT("CMMAVideoFramePositioningControl::MapFrameToTimeL, aFrameNumber: %d", aFrameNumber);

    // Find out framerate of video

    TReal32 frameRate = 0;

    GetAndCheckFrameRateL(frameRate);

    // Find out frame mediatime

    TInt64 frameMediaTime =

        ((TReal32)aFrameNumber / (TReal32)frameRate) *

        KMMAFramePosMicroSecMultiplier;

    TInt64 duration;

    iPlayer->GetDuration(&duration);

    if (frameMediaTime < 0)

    {

        frameMediaTime = KErrNotFound;

    }

    else if (frameMediaTime > duration)

    {

        frameMediaTime = KErrNotFound;

        // With some medias last frame media time is few hundred microsec's

        // over duration. This is because framerate is not accurate.

        // If given frame number is last frame and frameMediaTime > duration,

        // return duration

        // Find out last frame

        TReal lastFrame = (frameRate * (TReal32)duration) /

                          KMMAFramePosMicroSecMultiplier;

        User::LeaveIfError(Math::Round(lastFrame, lastFrame, 0));

        if (aFrameNumber == lastFrame)

        {

            frameMediaTime = duration;

        }

    }

    *aMediaTime = frameMediaTime;

}

TInt CMMAVideoFramePositioningControl::MapTimeToFrameL(TInt64* aMediaTime)

{

    DEBUG_INT("CMMAVideoFramePositioningControl::MapTimeToFrameL, aMediaTime: %d", *aMediaTime);

    TInt64 mediaTime = *aMediaTime;

    // If given media time is < 0 or > duration, cannot map time to frame

    // conversion fails, -1 is returned

    TInt64 duration;

    iPlayer->GetDuration(&duration);

    if (mediaTime > duration || mediaTime < 0)

    {

        return KErrNotFound;

    }

    // Find out framerate of video

    TReal32 frameRate = 0;

    GetAndCheckFrameRateL(frameRate);

    // Calculate frame number from media time

    TReal tempReal = (TInt)((TReal64)(mediaTime * frameRate) /

                            KMMAFramePosMicroSecMultiplier);

    User::LeaveIfError(Math::Round(tempReal, tempReal, 0));

    return tempReal;

}

void CMMAVideoFramePositioningControl::GetAndCheckFrameRateL(

    TReal32& aFrameRate)

{

    DEBUG("CMMAVideoFramePositioningControl::GetAndCheckFrameRateL");

    RMMFVideoControllerCustomCommands customCommands =

        RMMFVideoControllerCustomCommands(iPlayer->Controller());

    User::LeaveIfError(customCommands.GetFrameRate(aFrameRate));

    DEBUG_INT("CMMAVideoFramePositioningControl::GetAndCheckFrameRateL, aFrameRate: %d", aFrameRate);

    if (aFrameRate <= 0)

    {

        // zero framerate is not accepted because cannot

        // divide by zero. Negative framerate is not

        // acceptable aswell.

        DEBUG("CMMAVideoFramePositioningControl::GetAndCheckFrameRateL: invalid framerate");

        User::Leave(KErrNotFound);

    }

}

//  END OF FILE