fw_audio_render.cpp

这是在PCA下的基于IPP库示例代码例子,在网上下了IPP的库之后,设置相关参数就可以编译该代码.

/*//////////////////////////////////////////////////////////////////////////////
//
//                  INTEL CORPORATION PROPRIETARY INFORMATION
//     This software is supplied under the terms of a license agreement or
//     nondisclosure agreement with Intel Corporation and may not be copied
//     or disclosed except in accordance with the terms of that agreement.
//          Copyright(c) 2003-2005 Intel Corporation. All Rights Reserved.
//
*/
#include "umc_defs.h"

#ifdef UMC_ENABLE_FW_AUDIO_RENDER

#include "fw_audio_render.h"
#include "vm_time.h"

UMC::FWAudioRender::FWAudioRender():
    m_tickStartTime(0),
    m_tickPrePauseTime(0),
    m_dfStartPTS(-1.0)
{}

UMC::Status
UMC::FWAudioRender::Init(MediaReceiverParams* pInit)
{
    Status umcRes = UMC_OK;
    int err;

    AudioRenderParams* pParams =
        DynamicCast<AudioRenderParams, MediaReceiverParams>(pInit);
    if (NULL == pParams)
    {   umcRes = UMC_NULL_PTR;  }

    if (UMC_OK == umcRes)
    {   umcRes = BasicAudioRender::Init(pInit); }

    m_tickStartTime = 0;
    m_tickPrePauseTime = 0;
    m_dfStartPTS = -1.0;

    err = m_wav_file.Open(VM_STRING("output.wav"), AudioFile::AFM_CREATE);
    if (err < 0)
        return UMC_FAILED_TO_INITIALIZE;
    m_wav_info.format_tag          = 1;
    m_wav_info.sample_rate         = pParams->info.sample_frequency;
    m_wav_info.resolution          = pParams->info.bitPerSample;
    m_wav_info.channels_number     = pParams->info.channels;
    m_wav_info.channel_mask        = 0;

    m_wav_file.SetInfo(&m_wav_info);

    return umcRes;
}

UMC::Status
UMC::FWAudioRender::SendFrame(MediaData* in)
{
    Status umcRes = UMC_OK;

    if (UMC_OK == umcRes && (NULL == in->GetDataPointer()))
    {    umcRes = UMC_NULL_PTR;    }

    if (-1.0 == m_dfStartPTS)
    {   m_dfStartPTS = in->GetTime();   }

    if (UMC_OK == umcRes)
    {
        if (0 == m_tickStartTime)
        {   m_tickStartTime = vm_time_get_tick();   }
        int nbytes = in->GetDataSize();
        int err = m_wav_file.Write((unsigned char *)in->GetDataPointer(), nbytes);
        if (err < 0)
            return UMC_OPERATION_FAILED;
    }
     return umcRes;
}

UMC::Status
UMC::FWAudioRender::Pause(bool pause)
{
    Status umcRes = UMC_OK;

    m_tickPrePauseTime += vm_time_get_tick() - m_tickStartTime;
    m_tickStartTime = 0;

    return umcRes;
}

float
UMC::FWAudioRender::SetVolume(float volume)
{
    return -1;
}

float
UMC::FWAudioRender::GetVolume()
{
    return -1;
}

UMC::Status
UMC::FWAudioRender::Close()
{
    m_wav_file.Close();

    m_dfStartPTS = -1.0;
    return BasicAudioRender::Close();
}

UMC::Status
UMC::FWAudioRender::Reset()
{
    m_tickStartTime = 0;
    m_tickPrePauseTime = 0;
    m_dfStartPTS = -1.0;
    return BasicAudioRender::Reset();
}

double
UMC::FWAudioRender::GetTimeTick()
{
    double dfRes = -1;
    vm_var32 uiBytesPlayed = 0;

    if (0 != m_tickStartTime)
    {
        dfRes = m_dfStartPTS +
            ((double)(vm_var64s)(m_tickPrePauseTime +
            vm_time_get_tick() - m_tickStartTime)) / (double)(vm_var64s)vm_time_get_frequency();
    }
    else
    {
        dfRes = m_dfStartPTS +
                        ((double)(vm_var64s)m_tickPrePauseTime) / (double)(vm_var64s)vm_time_get_frequency();
    }

    return dfRes;
}

#endif //UMC_ENABLE_FW_AUDIO_RENDER