mp4_parser.c

最新MTK手机软件源码

/*****************************************************************************
*  Copyright Statement:
*  --------------------
*  This software is protected by Copyright and the information contained
*  herein is confidential. The software may not be copied and the information
*  contained herein may not be used or disclosed except with the written
*  permission of MediaTek Inc. (C) 2005
*
*  BY OPENING THIS FILE, BUYER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
*  THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
*  RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO BUYER ON
*  AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
*  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
*  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
*  NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
*  SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
*  SUPPLIED WITH THE MEDIATEK SOFTWARE, AND BUYER AGREES TO LOOK ONLY TO SUCH
*  THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. MEDIATEK SHALL ALSO
*  NOT BE RESPONSIBLE FOR ANY MEDIATEK SOFTWARE RELEASES MADE TO BUYER'S
*  SPECIFICATION OR TO CONFORM TO A PARTICULAR STANDARD OR OPEN FORUM.
*
*  BUYER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND CUMULATIVE
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*  AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
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*  MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE. 
*
*  THE TRANSACTION CONTEMPLATED HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE
*  WITH THE LAWS OF THE STATE OF CALIFORNIA, USA, EXCLUDING ITS CONFLICT OF
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*  RELATED THERETO SHALL BE SETTLED BY ARBITRATION IN SAN FRANCISCO, CA, UNDER
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*****************************************************************************/

/*******************************************************************************
 *
 * Filename:
 * ---------
 * mp4_parser.c
 *
 * Project:
 * --------
 *   MAUI
 *
 * Description:
 * ------------
 *   MPEG-4 Parser
 *
 * Author:
 * -------
 * -------
 *
 *==============================================================================
 *             HISTORY
 * Below this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
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 *==============================================================================
 *******************************************************************************/

#include "mp4_parser.h"

#define SHOW_4_HEX(str, data)             \
   printf("%s:%x%x%x%x(hex)\n", str, (data[0]), (data[1]), (data[2]), (data[3]));

#define SHOW_4_CHAR(str, data)               \
   printf("%s:%c%c%c%c(char)\n", str, (data[0]), (data[1]), (data[2]), (data[3]));


        
/*
DESCRIPTION
   Parse the base class Box.
   The file pointer advances after the base class Box.
OUTPUT
   *size: The size of the box excluding Box
   *type: The type of the box
RETURN
   MP4_PARSER_OK: Successful
   MP4_PARSER_64BIT_NOT_SUPPORT: We do not support 64-bit integers
   MP4_PARSER_LARGER_31BIT_NOT_SUPPORT: We do not support numbers larger than 31 bits
*/
MP4_Parser_Status mp4_parse_box(STMp4Parser *pstMp4Parser, kal_uint32 *size, kal_uint32 *type)
{
   MP4_PARSER_CHECK_ARG(pstMp4Parser!=NULL);
   MP4_PARSER_CHECK_ARG(size!=NULL);
   MP4_PARSER_CHECK_ARG(type!=NULL);

   if((pstMp4Parser->eFSALErr=FSAL_Read_UINT(pstMp4Parser->pstFSAL, size))!=FSAL_OK)
      return MP4_PARSER_FILE_READ_ERROR;

   if((pstMp4Parser->eFSALErr=FSAL_Read_UINT(pstMp4Parser->pstFSAL, type))!=FSAL_OK)
      return MP4_PARSER_FILE_READ_ERROR;

   #if MP4_PARSER_VERBOSE
   printf("type=%c%c%c%c size=%u\n",
      (*type>>24) & 0xFF, (*type>>16) & 0xFF, (*type>>8) & 0xFF, *type & 0xFF, *size);
   #endif
   if(*size==1) { /* large size indication */
      /* do not support large size */
      /* res = fread(&largesize, 8, 1, fpMp4);
         if(res!=1) break; */
      return MP4_PARSER_64BIT_NOT_SUPPORT;
   } else if (*size==0) {
      kal_uint32 cur_pos;
      // box extends to end of file
      if ((pstMp4Parser->eFSALErr = FSAL_GetFileSize(pstMp4Parser->pstFSAL, size)) != FSAL_OK )
         return MP4_PARSER_FILE_ACCESS_ERROR;
      
      if ((pstMp4Parser->eFSALErr = FSAL_GetCurPos(pstMp4Parser->pstFSAL, &cur_pos)) != FSAL_OK )
         return MP4_PARSER_FILE_ACCESS_ERROR;
      
      if( *size <= cur_pos )
         return MP4_PARSER_PARSE_ERROR;
      *size -= cur_pos;
      *size += 8;             // add back the sizes of chunk ID and chunk size fields
   }
/*
   if (type == BOX_TYPE_UUID) {
      unsigned char usertype[16];
      res = fread(&usertype, 16, 1, fpMp4);
      if(res!=1) break;
   } */
   /* Do not support size larger than 31 bits */
   if((*size)&0x80000000)
      return MP4_PARSER_LARGER_31BIT_NOT_SUPPORT;
   *size -= 8;
   return MP4_PARSER_OK;
}



/*
DESCRIPTION
   Seek to the specified atom in the specified range.
   The file pointer advances after the base class Box.
INPUT
   uBoxType: The type of box to look for
   uRange: Search inside the following uRange bytes
OUTPUT
   *uSizeBox: The size of the box excluding Box
RETURN
   MP4_PARSER_OK: Successful
   other values: refer to mp4_parse_box
*/

MP4_Parser_Status mp4_seek_atom(STMp4Parser *pstMp4Parser, kal_uint32 uBoxType, kal_uint32 uRange, kal_uint32 *uSizeBox)
{
   MP4_Parser_Status ret;

   MP4_PARSER_CHECK_ARG(pstMp4Parser!=NULL);
   MP4_PARSER_CHECK_ARG(uSizeBox!=NULL);

   while(uRange > 0) {
      kal_uint32 size;
      kal_uint32 type;

      if((ret=mp4_parse_box(pstMp4Parser, &size, &type))!=MP4_PARSER_OK)
         return ret;
      uRange -= 8;

      if(type==uBoxType) {
         *uSizeBox = size;
         return MP4_PARSER_OK;
      }
      else { /* unrecognized type, skip the box */
         if((pstMp4Parser->eFSALErr=FSAL_Skip_Bytes(pstMp4Parser->pstFSAL, size))!=FSAL_OK)
            return MP4_PARSER_FILE_SEEK_ERROR;
      }
      uRange -= size;
   }
   if (uRange!=0)
      return MP4_PARSER_PARSE_ERROR;
   return MP4_PARSER_ATOM_NOT_FOUND;
}

/*
DESCRIPTION
   Parse the base descriptor. (Refer to ISO 14496-1)
OUTPUT
   *type: The type of the box
   *size: The size of the box excluding Box
RETURN
   MP4_PARSER_OK: Successful
   Other values: Parse error
*/
static MP4_Parser_Status mp4_parse_base_descriptor(STMp4Parser *pstMp4Parser, kal_uint8 *tag, kal_uint32 *size)
{
   kal_uint8 tmp;

   MP4_PARSER_CHECK_ARG(pstMp4Parser!=NULL);
   MP4_PARSER_CHECK_ARG(tag!=NULL);
   MP4_PARSER_CHECK_ARG(size!=NULL);

   if((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, tag, 1))!=FSAL_OK)
      return MP4_PARSER_FILE_READ_ERROR;

   if((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, &tmp, 1))!=FSAL_OK)
      return MP4_PARSER_FILE_READ_ERROR;

   *size = (tmp & 0x7F);
   while(tmp&0x80) {
      if((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, &tmp, 1))!=FSAL_OK)
         return MP4_PARSER_FILE_READ_ERROR;
      *size = ((*size) << 7) + (tmp & 0x7F);
   }
   return MP4_PARSER_OK;
}



/*
DESCRIPTION
   Parse the File Type Box.
INPUT
   size: The size of File Type Box excluding Box
RETURN
   MP4_PARSER_OK: Successful
   Other values: Parse error
*/

static MP4_Parser_Status mp4_parse_ftyp(STMp4Parser *pstMp4Parser, kal_int32 ftyp_size)
{
   /* File Type Box is a leaf node. */
   kal_uint8 major_brand[4];
   kal_uint8 minor_version[4];
   /// kal_uint8 compatible_brand[4];

   MP4_PARSER_CHECK_ARG(pstMp4Parser!=NULL);

   if (ftyp_size<8)
      return MP4_PARSER_PARSE_ERROR;

   if ((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, major_brand, 4))!=FSAL_OK)
      return MP4_PARSER_FILE_READ_ERROR;
   
   if ((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, minor_version, 4))!=FSAL_OK)
      return MP4_PARSER_FILE_READ_ERROR;

   ftyp_size -= 8;
#if MP4_PARSER_VERBOSE
   SHOW_4_CHAR("major_brand", major_brand);
   SHOW_4_HEX("minor_version", minor_version);
#endif

/// Rey: Directly skip the compatible brand to avoid long response time if the size of ftyp is corrupted.
/*
   for (i=0; i<ftyp_size/4; i++) {
      if ((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, compatible_brand, 4))!=FSAL_OK)
         return MP4_PARSER_FILE_READ_ERROR;     
#if MP4_PARSER_VERBOSE
      SHOW_4_CHAR("compatible_brand", compatible_brand);
#endif
      ftyp_size -= 4;
   }
*/

   if ((pstMp4Parser->eFSALErr=FSAL_Skip_Bytes(pstMp4Parser->pstFSAL, ftyp_size))!=FSAL_OK)
      return MP4_PARSER_FILE_SEEK_ERROR;

   return MP4_PARSER_OK;
}



/*
DESCRIPTION
   Parse the Movie Header Box.
INPUT
   size: The size of Movie Header Box excluding Box
RETURN
   MP4_PARSER_OK: Successful
   MP4_PARSER_PARSE_ERROR: Parse error
*/

static MP4_Parser_Status mp4_parse_mvhd(STMp4Parser *pstMp4Parser, kal_int32 mvhd_size)
{
   /* Move Header Box is a leaf node. */
   kal_uint8 version;
   kal_uint8 flags[3];

   MP4_PARSER_CHECK_ARG(pstMp4Parser!=NULL);

   if(mvhd_size<100)
      return MP4_PARSER_PARSE_ERROR;
 
   if((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, &version, 1))!=FSAL_OK)
      return MP4_PARSER_FILE_READ_ERROR;

   if((pstMp4Parser->eFSALErr=FSAL_Read_Bytes(pstMp4Parser->pstFSAL, flags, 3))!=FSAL_OK)
      return MP4_PARSER_FILE_READ_ERROR;

   if(version==1) /* We do not support 64 bit values. */
      return MP4_PARSER_64BIT_NOT_SUPPORT;