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AEPackIEC958.cpp    144 lines (121 with data), 4.4 kB

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/*
* Copyright (C) 2005-2010 Team XBMC
* http://www.xbmc.org
*
* This Program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This Program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with XBMC; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
* http://www.gnu.org/copyleft/gpl.html
*
*/
/* DTS spec shows it suppors both BE and LE, we should not need to convert */
#include "system.h"
#include "AEPackIEC958.h"
#define IEC958_PREAMBLE1 0xF872
#define IEC958_PREAMBLE2 0x4E1F
inline void SwapEndian(uint16_t *dst, uint16_t *src, unsigned int size)
{
for(unsigned int i = 0; i < size; ++i, ++dst, ++src)
*dst = ((*src & 0xFF00) >> 8) | ((*src & 0x00FF) << 8);
}
int CAEPackIEC958::PackAC3(uint8_t *data, unsigned int size, uint8_t *dest)
{
struct IEC958Packet *packet = (struct IEC958Packet*)dest;
packet->m_preamble1 = IEC958_PREAMBLE1;
packet->m_preamble2 = IEC958_PREAMBLE2;
if (data == NULL)
data = packet->m_data;
int bitstream_mode = data[5] & 0x7;
packet->m_type = IEC958_TYPE_AC3 | (bitstream_mode << 8);
packet->m_length = size << 3;
#ifdef __BIG_ENDIAN__
else
memcpy(packet->m_data, data, size);
#else
SwapEndian((uint16_t*)packet->m_data, (uint16_t*)data, size >> 1);
#endif
memset(packet->m_data + size, 0, OUT_FRAMESTOBYTES(AC3_FRAME_SIZE) - size);
return OUT_FRAMESTOBYTES(AC3_FRAME_SIZE);
}
int CAEPackIEC958::PackEAC3(uint8_t *data, unsigned int size, uint8_t *dest)
{
struct IEC958Packet *packet = (struct IEC958Packet*)dest;
packet->m_preamble1 = IEC958_PREAMBLE1;
packet->m_preamble2 = IEC958_PREAMBLE2;
packet->m_type = IEC958_TYPE_EAC3;
packet->m_length = size;
if (data == NULL)
data = packet->m_data;
#ifdef __BIG_ENDIAN__
else
memcpy(packet->m_data, data, size);
#else
SwapEndian((uint16_t*)packet->m_data, (uint16_t*)data, size >> 1);
#endif
memset(packet->m_data + size, 0, OUT_FRAMESTOBYTES(EAC3_FRAME_SIZE) - size);
return OUT_FRAMESTOBYTES(EAC3_FRAME_SIZE);
}
int CAEPackIEC958::PackDTS_512(uint8_t *data, unsigned int size, uint8_t *dest)
{
struct IEC958Packet *packet = (struct IEC958Packet*)dest;
packet->m_preamble1 = IEC958_PREAMBLE1;
packet->m_preamble2 = IEC958_PREAMBLE2;
packet->m_type = IEC958_TYPE_DTS1;
packet->m_length = size << 3;
if (data == NULL)
data = packet->m_data;
#ifdef __BIG_ENDIAN__
else
memcpy(packet->m_data, data, size);
#else
SwapEndian((uint16_t*)packet->m_data, (uint16_t*)data, size >> 1);
#endif
memset(packet->m_data + size, 0, OUT_FRAMESTOBYTES(DTS1_FRAME_SIZE) - size);
return OUT_FRAMESTOBYTES(DTS1_FRAME_SIZE);
}
int CAEPackIEC958::PackDTS_1024(uint8_t *data, unsigned int size, uint8_t *dest)
{
struct IEC958Packet *packet = (struct IEC958Packet*)dest;
packet->m_preamble1 = IEC958_PREAMBLE1;
packet->m_preamble2 = IEC958_PREAMBLE2;
packet->m_type = IEC958_TYPE_DTS2;
packet->m_length = size << 3;
if (data == NULL)
data = packet->m_data;
#ifdef __BIG_ENDIAN__
else
memcpy(packet->m_data, data, size);
#else
SwapEndian((uint16_t*)packet->m_data, (uint16_t*)data, size >> 1);
#endif
memset(packet->m_data + size, 0, OUT_FRAMESTOBYTES(DTS2_FRAME_SIZE) - size);
return OUT_FRAMESTOBYTES(DTS2_FRAME_SIZE);
}
int CAEPackIEC958::PackDTS_2048(uint8_t *data, unsigned int size, uint8_t *dest)
{
struct IEC958Packet *packet = (struct IEC958Packet*)dest;
packet->m_preamble1 = IEC958_PREAMBLE1;
packet->m_preamble2 = IEC958_PREAMBLE2;
packet->m_type = IEC958_TYPE_DTS3;
packet->m_length = size << 3;
if (data == NULL)
data = packet->m_data;
#ifdef __BIG_ENDIAN__
else
memcpy(packet->m_data, data, size);
#else
SwapEndian((uint16_t*)packet->m_data, (uint16_t*)data, size >> 1);
#endif
memset(packet->m_data + size, 0, OUT_FRAMESTOBYTES(DTS3_FRAME_SIZE) - size);
return OUT_FRAMESTOBYTES(DTS3_FRAME_SIZE);
}