如何讀一個H264檔案，將資料轉換到DM8127或DM8168的Bitstream_BufList

 問題如下：

Receiving encoded stream from network via RTSPClient and decode those stream. I just know copy the encoded stream from the network intoBitstream_Buf->addr and I don't know how to initialize (fill up) all fields of Bitstream_Buf before put them to the decoder by calling the function IpcBitsOutLink_putFullVideoBitStreamBufs. 

 

 

Bitstream_BufList定義如下：

 

/*******************************************************************************
 *                                                                             *
 *  Copyright (c) 2011 Texas Instruments Incorporated - http://www.ti.com/     *
 *                        ALL RIGHTS RESERVED                                  *
 *                                                                             *
 ******************************************************************************/

/**
    \ingroup LINK_API
    \defgroup VIDBITSTREAM Video Bitstream data structure definition

    This file defines the data structure representing an encoded video frame's
    bitstream object

    @{
*/

/**
    \file vidbitstream.h
    \brief Definition of encoded video bitstream data structures
*/

#ifndef _VIDBITSTREAM_H_
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define _VIDBITSTREAM_H_

/**
 * @brief  Buffer alignment needed for IVA-HD codecs
 */

#ifdef TI_8107_BUILD
#define  IVACODEC_VDMA_BUFFER_ALIGNMENT                                    (128)
#else
#define  IVACODEC_VDMA_BUFFER_ALIGNMENT                                    (32)
#endif
/**
 * @def    VIDBITSTREAM_MAX_BITSTREAM_BUFS
 * @brief  Maximum number of bitstream buf in a Bitstream_BufList @sa Bitstream_BufList
 */
#define VIDBITSTREAM_MAX_BITSTREAM_BUFS  (64)

/**
    \brief Bit stream buffer
*/
typedef struct Bitstream_Buf {
    UInt32 reserved[2];
    /**< First two 32 bit entries are reserved to allow use as Que element */
    void *addr;
    /**< Buffer Pointer */
    UInt32 bufSize;
    /**< Size of the buffer */
    UInt32 fillLength;
    /**< Filled lengh from start offset */
    UInt32 startOffset;
    /**< Start offset */
    UInt32 mvDataOffset;
    /**< Actual offset to mv data bistream in buffer, in bytes */
    UInt32 mvDataFilledSize;
    /**< Actual size of mv data bistream in buffer, in bytes */
    UInt32 channelNum;
    /**< Channel number */
    UInt32 codingType;
    /**< Coding type */
    void *appData;
    /**< Additional application parameter per buffer */

    UInt32 timeStamp;
    /**< Original Capture time stamp */

    UInt32 temporalId;
    /**< SVC TemporalId */

    UInt32 upperTimeStamp;
    /**< Original Capture time stamp:Upper 32 bit value*/
    UInt32 lowerTimeStamp;
    /**< Original Capture time stamp: Lower 32 bit value*/
    UInt32 encodeTimeStamp;
    /**< Encode complete time stamp */

    UInt32 isKeyFrame;
    /**< Flag indicating whether is currentFrame is key frame */
    UInt32 allocPoolID;
    /**< Pool frame from which buf was originally alloced */
    UInt32 phyAddr;
    /**< Physical address of the buffer */
    UInt32 frameWidth;
    /**< Width of the encoded frame */
    UInt32 frameHeight;
    /**< Height of the encoded frame */
    UInt32 doNotDisplay;
    /**< Flag indicating frame should not be displayed
     *   This is useful when display should start from a
     *   particular frame.
     *   This is temporary until Avsync suuports seek functionality*/
     UInt32 bottomFieldBitBufSize;
     /**< Size of the bottom field Bitstream. Filled by field Merged
          interlaced encoders     */
} Bitstream_Buf;

/**
 *  \brief Bit stream Buffer List used to exchange multiple Bitstream Buffers
 *         between links
 */
typedef struct
{
    Bitstream_Buf       *bufs[VIDBITSTREAM_MAX_BITSTREAM_BUFS];
    /**< Array of Bitstream_Buf pointers that are to given or received from the
         codec. */

    UInt32              numBufs;
    /**< Number of frames that are given or received from the codec
       i.e number of valid pointers in the array containing Bitstream_Buf
       pointers. */

    void                *appData;
    /**< Additional application parameter per buffer list */

} Bitstream_BufList;



#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _VIDBITSTREAM_H_*/

/** @}*/

 

dm8127下有個例子：

 

Void *MultiCh_ipcBitsMain(Void *prm)
{
    UInt32 i;
 OSA_DmaCopy1D copy1D;
 Bitstream_BufList fullBitsBufList;
 Bitstream_BufList emptyBitsBufList;
 IpcBitsOutLinkHLOS_BitstreamBufReqInfo ipcReqInfo;

 OSA_printf("Entered IPC Bits Handler function\n");
 gIpcBitsThObj.exitTh   = FALSE;
 gIpcBitsThObj.exitDone = FALSE;

 while(gIpcBitsThObj.exitTh == FALSE)
 {
  OSA_semWait(&gIpcBitsNotifySem,OSA_TIMEOUT_FOREVER);

  IpcBitsInLink_getFullVideoBitStreamBufs(gIpcBitsInHLOSId,&fullBitsBufList);

  ipcReqInfo.numBufs = fullBitsBufList.numBufs;
  for(i = 0;i < ipcReqInfo.numBufs;i++)
  {
   ipcReqInfo.minBufSize[i] = DEC_MIN_BUF_SIZE;
  }

  if(IpcBitsOutLink_getEmptyVideoBitStreamBufs(gIpcBitsOutHLOSId,&emptyBitsBufList,&ipcReqInfo) == IPC_BITSOUT_LINK_S_SUCCESS)
  {
   emptyBitsBufList.numBufs = fullBitsBufList.numBufs;

   for(i = 0;i < fullBitsBufList.numBufs;i++)
   {
    if((Int32)emptyBitsBufList.bufs[i]->addr & 0x80000000)
    {
     goto skip;
    }

    emptyBitsBufList.bufs[i]->channelNum = fullBitsBufList.bufs[i]->channelNum;
    emptyBitsBufList.bufs[i]->fillLength = fullBitsBufList.bufs[i]->fillLength;
    emptyBitsBufList.bufs[i]->timeStamp  = fullBitsBufList.bufs[i]->timeStamp;

    if(gDmaHndl.chId == 0xFF)
    {
     memcpy(emptyBitsBufList.bufs[i]->addr,
         (fullBitsBufList.bufs[i]->addr + fullBitsBufList.bufs[i]->startOffset),
         fullBitsBufList.bufs[i]->fillLength);
    }
    else
    {
     copy1D.srcPhysAddr = (unsigned long)CMEM_getPhys(fullBitsBufList.bufs[i]->addr + fullBitsBufList.bufs[i]->startOffset);
     copy1D.dstPhysAddr = (unsigned long)CMEM_getPhys(emptyBitsBufList.bufs[i]->addr);
     copy1D.size        = fullBitsBufList.bufs[i]->fillLength;
     OSA_dmaCopy1D(&gDmaHndl,&copy1D,1);
    }
   }

   IpcBitsOutLink_putFullVideoBitStreamBufs(gIpcBitsOutHLOSId,&emptyBitsBufList);
  }
skip:
  IpcBitsInLink_putEmptyVideoBitStreamBufs(gIpcBitsInHLOSId,&fullBitsBufList);
 }

 gIpcBitsThObj.exitDone = TRUE;

 OSA_printf("Exiting IPC Bits Handler function\n");

    return NULL;
}

 

參考這個例子：將h264資料送到videoM3解碼時，出現錯誤；

1）在videoM3解碼有問題，錯誤碼為0x2000a00, 通過查詢TI的文件，該錯誤碼是一個32位，表示32個錯誤，此錯誤碼錶示第9,11,25位對應為1；
錯誤如下：
XDM_APPLIEDCONCEALMENT :Applied concealment;
XDM_CORRUPTEDDATA :    Data problem/corruption;
IH264VDEC_ERR_MISSINGSLICE: one or more slices are completely missing in this picture;

 

因為使用的視訊是用海康相機錄的，使用海康工具將視訊檔案轉換為標準h264檔案，然後ultraEdit裁剪到0x00 00 00 01 67 前的資料，解決；

 

2）dm8148，我將h264資料送入videoM3 解碼時，出錯； if(IpcBitsOutLink_getEmptyVideoBitStreamBufs(IPCBITOUTHOSTTOVIDM3ID,&emptyBitsBufList,&ipcReqInfo) == IPC_BITSOUT_LINK_S_SUCCESS) dm8127 這個地方獲取的地址emptyBitsBufList有時有問題，獲取的是實體地址了，本來是虛擬地址的； 有人知道原因嗎？