mp4_sample_data_audio.c

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/*******************************************************************************
 *
 * Filename:
 * ---------
 * mp4_sample_data_audio.c
 *
 * Project:
 * --------
 *   MAUI
 *
 * Description:
 * ------------
 *   Audio sample data file accessing utilities for MPEG-4 recording
 *
 * Author:
 * -------
 * -------
 *
 *==============================================================================
 *             HISTORY
 * Below this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
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 *==============================================================================
 *******************************************************************************/

#include "mp4_sample_data_audio.h"


extern const kal_uint16 lenSpeechBitsAMR[9];
extern const kal_uint16 lenSpeechBitsAMR_WB[10];

#define MP4_SAMPLE_DATA_GET_AUDIO_SAMPLE_SIZE(uSampleNo, uSampleSize) \
   if (MP4_AudioSampleData_GetSampleSize(pstMp4SampleData, (uSampleNo), &(uSampleSize))!=MP4_SAMPLE_DATA_OK) \
      return MP4_SAMPLE_DATA_FILE_READ_ERROR;

MP4_SampleData_Status MP4_AudioSampleData_Init(STMp4SampleDataAudio *pstMp4SampleData, STFSAL *pstFSAL)
{

   MP4_SAMPLE_DATA_CHECK_ARG(pstMp4SampleData!=NULL);
   MP4_SAMPLE_DATA_CHECK_ARG(pstFSAL!=NULL);

   pstMp4SampleData->pstFSAL = pstFSAL;

   /* get audio type */
   pstMp4SampleData->eAudioType = MP4_AUDIO_NONE;
	if ((pstMp4SampleData->eFSALErr=FSAL_Seek(pstFSAL, 0))!=FSAL_OK)
		return MP4_SAMPLE_DATA_FILE_SEEK_ERROR;
	if ((pstMp4SampleData->eFSALErr=FSAL_Read_Bytes(pstFSAL, (kal_uint8 *)&(pstMp4SampleData->eAudioType), 1))!=FSAL_OK)
		return MP4_SAMPLE_DATA_FILE_READ_ERROR;

   return MP4_SAMPLE_DATA_OK;
}



 MP4_SampleData_Status MP4_AudioSampleData_GetSampleCount(STMp4SampleDataAudio *pstMp4SampleData, kal_uint32 *puSampleCount)
{
   MP4_SAMPLE_DATA_CHECK_ARG(pstMp4SampleData!=NULL);
   MP4_SAMPLE_DATA_CHECK_ARG(pstMp4SampleData->pstFSAL!=NULL);
   MP4_SAMPLE_DATA_CHECK_ARG(puSampleCount!=NULL);

	if ((pstMp4SampleData->eFSALErr=FSAL_Seek(pstMp4SampleData->pstFSAL, 1))!=FSAL_OK)
		return MP4_SAMPLE_DATA_FILE_SEEK_ERROR;

	if ((pstMp4SampleData->eFSALErr=FSAL_Read_UINT(pstMp4SampleData->pstFSAL, puSampleCount))!=FSAL_OK)
		return MP4_SAMPLE_DATA_FILE_READ_ERROR;

   return MP4_SAMPLE_DATA_OK;
}



kal_bool MP4_AudioSampleData_EqualSampleSize(STMp4SampleDataAudio *pstMp4SampleData)
{
   return KAL_FALSE;
}



MP4_SampleData_Status MP4_AudioSampleData_GetSampleSize(STMp4SampleDataAudio *pstMp4SampleData, kal_uint32 uSampleNo, kal_uint32 *puSampleSize)
{
   kal_uint8 bFrameType;

   MP4_SAMPLE_DATA_CHECK_ARG(pstMp4SampleData!=NULL);
   MP4_SAMPLE_DATA_CHECK_ARG(pstMp4SampleData->pstFSAL!=NULL);
   MP4_SAMPLE_DATA_CHECK_ARG(puSampleSize!=NULL);

	if ((pstMp4SampleData->eFSALErr=FSAL_Seek(pstMp4SampleData->pstFSAL, 5 + uSampleNo*1))!=FSAL_OK)
		return MP4_SAMPLE_DATA_FILE_SEEK_ERROR;

	if ((pstMp4SampleData->eFSALErr=FSAL_Read_Bytes(pstMp4SampleData->pstFSAL, &bFrameType, 1))!=FSAL_OK)
		return MP4_SAMPLE_DATA_FILE_READ_ERROR;

   if (MP4_AUDIO_AMR==pstMp4SampleData->eAudioType) {
      if (bFrameType<=8)
         *puSampleSize = (lenSpeechBitsAMR[bFrameType] + 7) / 8;
      else if (bFrameType==15)
         *puSampleSize = 0;
      else
         return MP4_SAMPLE_DATA_FILE_FORMAT_ERROR;
   } else if (MP4_AUDIO_AMR_WB==pstMp4SampleData->eAudioType) {
      if (bFrameType<=9)
         *puSampleSize = (lenSpeechBitsAMR_WB[bFrameType] + 7) / 8;
      else if (bFrameType==15)
         *puSampleSize = 0;
      else
         return MP4_SAMPLE_DATA_FILE_FORMAT_ERROR;
   } else {
      return MP4_SAMPLE_DATA_FILE_FORMAT_ERROR;
   }

   *puSampleSize += 1; /* include frame header */

   return MP4_SAMPLE_DATA_OK;
}



MP4_Audio_Type MP4_AudioSampleData_GetAudioType(STMp4SampleDataAudio *pstMp4SampleData)
{
   ASSERT(pstMp4SampleData!=NULL);

   return pstMp4SampleData->eAudioType;
}

MP4_SampleData_Status MP4_AudioSampleData_GetSampleOffset(STMp4SampleDataAudio *pstMp4SampleData, kal_uint32 uSampleNo, kal_uint32 *puSampleOffset, kal_uint32 uSampleNo_Ref, kal_uint32 uSampleOffset_Ref)
{
   kal_uint32 uEachSample;

   MP4_SAMPLE_DATA_CHECK_ARG(pstMp4SampleData!=NULL);
   MP4_SAMPLE_DATA_CHECK_ARG(puSampleOffset!=NULL);

   *puSampleOffset = uSampleOffset_Ref;

   for(uEachSample=uSampleNo_Ref; uEachSample<uSampleNo; uEachSample++) {
      kal_uint32 uSampleSize;
      MP4_SAMPLE_DATA_GET_AUDIO_SAMPLE_SIZE(uEachSample, uSampleSize);
      *puSampleOffset += uSampleSize;
   }
   // printf("get sample %d offset=%d\n", uSampleNo, uSampleOffset);
   // *puSampleOffset += 8; /* XXX: "8" WILL BE AN INPUT WHEN INTEGRATION */

   return MP4_SAMPLE_DATA_OK;
}