sl@0: // Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0:
sl@0: #include "mp4atom.h"
sl@0: #include <3gplibrary/mp4config.h>
sl@0: #include "mp4buffer.h"
sl@0: #include "mp4memwrap.h"
sl@0: #include "mp4file.h"
sl@0: #include "mp4list.h"
sl@0:
sl@0:
sl@0:
sl@0: /*
sl@0: * Function:
sl@0: *
sl@0: * mp4_i32 addData(MP4HandleImp handle,
sl@0: * mp4_u8 *buffer,
sl@0: * mp4_u32 bytestowrite)
sl@0: *
sl@0: * Description:
sl@0: *
sl@0: * This function allocates memory for the data and copies it from
sl@0: * buffer to the new allocated buffer.
sl@0: *
sl@0: * Parameters:
sl@0: *
sl@0: * handle MP4 library handle
sl@0: * buffer Buffer containing data
sl@0: * bytestowrite Size of buffer in bytes
sl@0: *
sl@0: * Return value:
sl@0: *
sl@0: * Negative Error
sl@0: * 0 Success
sl@0: *
sl@0: */
sl@0: mp4_i32 addData(MP4HandleImp handle, mp4_u8 *buffer, mp4_u32 bytestowrite)
sl@0: {
sl@0: void *newBuffer;
sl@0:
sl@0: newBuffer = mp4malloc(bytestowrite);
sl@0: if (newBuffer == NULL)
sl@0: return -1;
sl@0:
sl@0: mp4memcpy(newBuffer, buffer, bytestowrite);
sl@0:
sl@0: if (listAppend(handle->mem, newBuffer, bytestowrite)) /* Success */
sl@0: return 0;
sl@0: else
sl@0: {
sl@0: if (newBuffer)
sl@0: {
sl@0: delete newBuffer;
sl@0: newBuffer = NULL;
sl@0: }
sl@0: return -1;
sl@0: }
sl@0: }
sl@0:
sl@0:
sl@0: /*
sl@0: * Function:
sl@0: *
sl@0: * mp4_u32 getBufferedBytes(MP4HandleImp handle)
sl@0: *
sl@0: * Description:
sl@0: *
sl@0: * This function returns the number of bytes in the library internal
sl@0: * buffers.
sl@0: *
sl@0: * Parameters:
sl@0: *
sl@0: * handle MP4 library handle
sl@0: *
sl@0: * Return value:
sl@0: *
sl@0: * 0 The input is in a file and therefore no memory is used to store MP4
sl@0: * data or no memory in buffers.
sl@0: * >0 Number of bytes stored in the library internal buffers
sl@0: *
sl@0: */
sl@0: mp4_u32 getBufferedBytes(MP4HandleImp handle)
sl@0: {
sl@0: if (handle->file)
sl@0: return 0;
sl@0:
sl@0: return listBytesInList(handle->mem);
sl@0: }
sl@0:
sl@0:
sl@0: /*
sl@0: * Function:
sl@0: *
sl@0: * mp4_u32 getCumulativeBufferedBytes(MP4HandleImp handle)
sl@0: *
sl@0: * Description:
sl@0: *
sl@0: * This function returns the number of bytes passed through the library
sl@0: * internal buffers.
sl@0: *
sl@0: * Parameters:
sl@0: *
sl@0: * handle MP4 library handle
sl@0: *
sl@0: * Return value:
sl@0: *
sl@0: * 0 The input is in a file and therefore no memory is used to store MP4
sl@0: * data or no memory in buffers.
sl@0: * >0 Number of bytes stored in the library internal buffers
sl@0: *
sl@0: */
sl@0: mp4_u32 getCumulativeBufferedBytes(MP4HandleImp handle)
sl@0: {
sl@0: if (handle->file)
sl@0: return 0;
sl@0:
sl@0: return listCumulativeBytesInList(handle->mem);
sl@0: }
sl@0:
sl@0:
sl@0: /*
sl@0: * Function:
sl@0: *
sl@0: * mp4_i32 readData(MP4HandleImp handle,
sl@0: * mp4_u8 *buffer,
sl@0: * mp4_u32 bytestoread)
sl@0: *
sl@0: * Description:
sl@0: *
sl@0: * This function reads bytestoread bytes from memory buffers or file
sl@0: * to buffer.
sl@0: *
sl@0: * Parameters:
sl@0: *
sl@0: * handle MP4 library handle
sl@0: * buffer Caller allocated buffer for the data
sl@0: * bytestoread Number of bytes to read
sl@0: *
sl@0: * Return value:
sl@0: *
sl@0: * >= 0 Success. Value tells the number of bytes read.
sl@0: * -1 File has not been opened
sl@0: * -2 End of file or file error
sl@0: * -10 Not enough data in memory
sl@0: *
sl@0: */
sl@0: mp4_i32 readData(MP4HandleImp handle, mp4_u8 *buffer, mp4_u32 bytestoread)
sl@0: {
sl@0: if (handle->file) /* Input is in a file */
sl@0: {
sl@0: switch (readFile(handle, buffer, bytestoread))
sl@0: {
sl@0: case -2: /* EOF or error */
sl@0: return -2;
sl@0: case -1: /* File not open */
sl@0: return -1;
sl@0: case 0: /* Ok */
sl@0: return bytestoread;
sl@0: default:
sl@0: break;
sl@0: }
sl@0: }
sl@0: else /* Input is in memory list */
sl@0: {
sl@0: mp4_u32 i, j;
sl@0: node_s *node;
sl@0:
sl@0: if (handle->mem->bytesInList - handle->absPosition < bytestoread)
sl@0: return -10;
sl@0:
sl@0: i = 0;
sl@0: j = handle->absPosition;
sl@0:
sl@0: node = handle->mem->first;
sl@0:
sl@0: while (i < bytestoread)
sl@0: {
sl@0: if ((mp4_i32)(node->dataSize - j) <= 0)
sl@0: {
sl@0: j -= node->dataSize;
sl@0: node = node->next;
sl@0: continue;
sl@0: }
sl@0:
sl@0: {
sl@0: mp4_u32 k;
sl@0:
sl@0: k = node->dataSize - j >= bytestoread - i ? bytestoread - i : node->dataSize - j;
sl@0:
sl@0: mp4memcpy(buffer + i, ((mp4_u8 *)node->data) + j, k);
sl@0: i += k;
sl@0: j += k;
sl@0: }
sl@0: }
sl@0:
sl@0: handle->position = j;
sl@0: handle->absPosition += bytestoread;
sl@0:
sl@0: node = handle->mem->first;
sl@0: }
sl@0:
sl@0: return bytestoread;
sl@0: }
sl@0:
sl@0: /*
sl@0: * Function:
sl@0: *
sl@0: * mp4_i32 peekData(MP4HandleImp handle,
sl@0: * mp4_u8 *buffer,
sl@0: * mp4_u32 bytestoread)
sl@0: *
sl@0: * Description:
sl@0: *
sl@0: * This function reads bytestoread bytes from memory buffers or file
sl@0: * to buffer but doesn't change the internal position in the file/stream.
sl@0: *
sl@0: * Parameters:
sl@0: *
sl@0: * handle MP4 library handle
sl@0: * buffer Caller allocated buffer for the data
sl@0: * bytestoread Number of bytes to read
sl@0: *
sl@0: * Return value:
sl@0: *
sl@0: * >= 0 Success. Value tells the number of bytes read.
sl@0: * -1 File has not been opened
sl@0: * -2 End of file or file error
sl@0: * -3 fseek failed
sl@0: * -10 Not enough data in memory
sl@0: *
sl@0: */
sl@0: mp4_i32 peekData(MP4HandleImp handle, mp4_u8 *buffer, mp4_u32 bytestoread)
sl@0: {
sl@0: if (handle->file) /* Input is in a file */
sl@0: {
sl@0: switch (peekFile(handle, buffer, bytestoread))
sl@0: {
sl@0: case -3: /* fseek failed */
sl@0: return -3;
sl@0: case -2: /* EOF or error */
sl@0: return -2;
sl@0: case -1: /* File not open */
sl@0: return -1;
sl@0: case 0: /* Ok */
sl@0: return bytestoread;
sl@0: default:
sl@0: break;
sl@0: }
sl@0: }
sl@0: else /* Input is in memory list */
sl@0: {
sl@0: mp4_u32 i, j;
sl@0: node_s *node;
sl@0:
sl@0: if ((mp4_i32)(handle->mem->bytesInList - handle->absPosition) < (mp4_i32)bytestoread)
sl@0: return -10;
sl@0:
sl@0: i = 0;
sl@0: j = handle->absPosition;
sl@0:
sl@0: node = handle->mem->first;
sl@0:
sl@0: while (i < bytestoread)
sl@0: {
sl@0: if ((mp4_i32)(node->dataSize - j) <= 0)
sl@0: {
sl@0: j -= node->dataSize;
sl@0: node = node->next;
sl@0: continue;
sl@0: }
sl@0:
sl@0: {
sl@0: mp4_u32 k;
sl@0:
sl@0: k = node->dataSize - j >= bytestoread - i ? bytestoread - i : node->dataSize - j;
sl@0:
sl@0: mp4memcpy(buffer + i, ((mp4_u8 *)node->data) + j, k);
sl@0: i += k;
sl@0: j += k;
sl@0: }
sl@0: }
sl@0: }
sl@0:
sl@0: return bytestoread;
sl@0: }
sl@0:
sl@0:
sl@0: /*
sl@0: * Function:
sl@0: *
sl@0: * mp4_i32 discardData(MP4HandleImp handle,
sl@0: * mp4_i32 bytesToDiscard)
sl@0: *
sl@0: * Description:
sl@0: *
sl@0: * This function reads and discards bytesToDiscard bytes from file/stream.
sl@0: *
sl@0: * Parameters:
sl@0: *
sl@0: * handle MP4 library handle
sl@0: * bytesToDiscard This many bytes are discarded
sl@0: *
sl@0: * Return value:
sl@0: *
sl@0: * Negative integer Error
sl@0: * >= 0 Success. Value tells how many bytes were read.
sl@0: *
sl@0: */
sl@0: mp4_i32 discardData(MP4HandleImp handle, mp4_i32 bytesToDiscard)
sl@0: {
sl@0: mp4_i32 bytesread;
sl@0: mp4_i32 bytestoread;
sl@0: mp4_i32 totalbytesread = 0;
sl@0:
sl@0: while (totalbytesread < bytesToDiscard)
sl@0: {
sl@0: bytestoread = bytesToDiscard - totalbytesread;
sl@0: if (bytestoread > TMPBUFSIZE)
sl@0: bytestoread = TMPBUFSIZE;
sl@0:
sl@0: bytesread = readData(handle, handle->buf, bytestoread);
sl@0: if (bytesread < 0)
sl@0: return -1;
sl@0: totalbytesread += bytesread;
sl@0: }
sl@0:
sl@0: return totalbytesread;
sl@0: }
sl@0: // End of File