asfaudiocontrol.c

瑞星微公司RK27XX系列芯片的SDK开发包

/******************************************************************/
/*  Copyright (C) 2007 ROCK-CHIPS FUZHOU . All Rights Reserved.  */
/*******************************************************************
File :  AsfAudioControl.c
Desc :  主界面窗口
Author :
Date :  2007-08-24
Notes :
$Log :
*********************************************************************/
#include "include.h"
#include "system.h"
#include "../browser/BrowserStruct.h"
#ifdef BOARD
#include "../video/ASF/AsfFile.h"
#include "AudioControl.h"
#include "../audio/include/audio_globals.h"
#include "BrowserGlobal.h"
#include "AsfMacro.h"
#include "../VideoCodecs/VideoCodecs.h"
#include "AsfVideoControl.h"
#endif

/*********************************declare********************************/
#ifdef BOARD
extern SYS_FILE_INFO VideoFileInfo;
extern MY_FILE * pRawFileCache;
extern BACKGRND                    gScreen;
/*************************************************************/
extern MY_FILE * pRawFileCache;
extern short VideoPlaying;
extern INT16U AudioPlayState;

extern REG_AUDIOCONFIG* pAudioRegKey;
extern unsigned long ulEndOfRAM;

extern video_interface_t video_interface_wmv;
/*************************************************************/
extern void AudioStart(void);
extern BOOLEAN AudioDecInit(MY_FILE* pHandle);
extern void FileFuncInit(void);
extern int WMAFileSeekFast(void *hstate, unsigned long  cbOffset);
/*************************************************************/
#endif

unsigned long nSamplesPlayed; // 用于统计当前DMA送了多少个样点的音频数据，最大存放46ms左右的误差

int AsfAudioSeek(int msTime)
{
    int offset;
    int ret;
    int SampleRate = pAudioRegKey->Samplerate;

    if (video_interface_wmv.audio_flag)
    {
        AudioPlayState = Audio_State_FFD;
        //CodecSeek(msTime,0);
        offset = AsfSeekAudioPkt(&asf, &msTime);
        VideoAudioStop(0);
        if (AudioDecInit(pRawFileCache) != TRUE)
            return;

        if (offset)
        {
            if (!WMAFileSeekFast((void*)ulEndOfRAM, offset))
                nSamplesPlayed = ((msTime / 1000) * SampleRate) + (((msTime % 1000) * SampleRate) / 1000);
        }

        RockOSSendMsg(MBAUDIO, AS_GUAU_Resume, NULL);
    }
    return 0;
}

int AsfAudioGetCurTime(void)
{
    unsigned long msTime;
    if (video_interface_wmv.audio_flag)
    {
#if 0
        CodecGetTime(&msTime);
        return (int)((msTime > 150) ? (msTime - 150) : 0);
#else
        unsigned long SampleRate = pAudioRegKey->Samplerate;

        msTime = ((nSamplesPlayed / SampleRate) * 1000) +
                 (((nSamplesPlayed % SampleRate) * 1000) / SampleRate);
        return msTime;
#endif
    }
    else
    {
        return 0;
    }

}

int AsfAudioStart(void)
{
#ifdef BOARD
    char path[FS_MAX_PATH_LEN];

    RKmemcpy(path, VideoFileInfo.Path, FS_MAX_PATH_LEN);
    RKstrcat(path, VideoFileInfo.Name);

    pRawFileCache = AsfFopen(path, "rb");
    if (pRawFileCache == NULL)
        return FALSE;

    VideoPlaying = 1;
    nSamplesPlayed = 0;
    CurrentCodec = CODEC_WMA;
    FileFuncInit();

    if (AudioDecInit(pRawFileCache) != TRUE)
        return FALSE;
    return TRUE;
#endif
}

int AsfAudioCtrl(int cmd)
{
    switch (cmd)
    {
        case ASF_AUDIO_CTRL_START:
            return AsfAudioStart();
            break;
        case ASF_AUDIO_CTRL_PAUSE:
            RockOSSendMsg(MBAUDIO, AS_GUAU_Pause, NULL);
            break;
        case ASF_AUDIO_CTRL_FFD:
            AudioPlayState = Audio_State_FFD;
            break;
        case ASF_AUDIO_CTRL_FFW:
            AudioPlayState = Audio_State_FFW;
            break;
        case ASF_AUDIO_CTRL_RESUME:
            RockOSSendMsg(MBAUDIO, AS_GUAU_Resume, NULL);
            break;
        case ASF_AUDIO_CTRL_STOP:
            if (pRawFileCache != NULL)
            {
                AsfFClose(pRawFileCache);
                pRawFileCache = NULL;
            }
            RockOSSendMsg(MBAUDIO, AS_GUAU_VideoAudioStop, NULL);
            break;
        default:
            break;
    }
}