mirror of
https://github.com/tuxbox-neutrino/libstb-hal.git
synced 2025-08-26 15:02:58 +02:00
126 lines
3.3 KiB
C
126 lines
3.3 KiB
C
/*
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* LinuxDVB Output handling.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/* ***************************** */
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/* Includes */
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/* ***************************** */
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <linux/dvb/video.h>
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#include <linux/dvb/audio.h>
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#include <memory.h>
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#include <asm/types.h>
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#include <pthread.h>
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#include <errno.h>
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#include "common.h"
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#include "output.h"
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#include "debug.h"
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#include "stm_ioctls.h"
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#include "misc.h"
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/* ***************************** */
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/* Makros/Constants */
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/* ***************************** */
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/* ***************************** */
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/* Types */
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/* ***************************** */
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/* ***************************** */
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/* Varaibles */
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/* ***************************** */
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/* ***************************** */
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/* Prototypes */
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/* ***************************** */
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/* ***************************** */
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/* MISC Functions */
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/* ***************************** */
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void PutBits(BitPacker_t * ld, unsigned int code, unsigned int length)
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{
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unsigned int bit_buf;
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unsigned int bit_left;
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bit_buf = ld->BitBuffer;
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bit_left = ld->Remaining;
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#ifdef DEBUG_PUTBITS
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if (ld->debug)
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dprintf("code = %d, length = %d, bit_buf = 0x%x, bit_left = %d\n", code, length, bit_buf, bit_left);
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#endif /* DEBUG_PUTBITS */
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if (length < bit_left)
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{
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/* fits into current buffer */
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bit_buf = (bit_buf << length) | code;
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bit_left -= length;
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}
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else
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{
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/* doesn't fit */
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bit_buf <<= bit_left;
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bit_buf |= code >> (length - bit_left);
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ld->Ptr[0] = (char)(bit_buf >> 24);
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ld->Ptr[1] = (char)(bit_buf >> 16);
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ld->Ptr[2] = (char)(bit_buf >> 8);
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ld->Ptr[3] = (char)bit_buf;
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ld->Ptr += 4;
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length -= bit_left;
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bit_buf = code & ((1 << length) - 1);
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bit_left = 32 - length;
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bit_buf = code;
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}
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#ifdef DEBUG_PUTBITS
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if (ld->debug)
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dprintf("bit_left = %d, bit_buf = 0x%x\n", bit_left, bit_buf);
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#endif /* DEBUG_PUTBITS */
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/* writeback */
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ld->BitBuffer = bit_buf;
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ld->Remaining = bit_left;
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}
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void FlushBits(BitPacker_t * ld)
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{
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ld->BitBuffer <<= ld->Remaining;
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while (ld->Remaining < 32)
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{
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#ifdef DEBUG_PUTBITS
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if (ld->debug)
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dprintf("flushing 0x%2.2x\n", ld->BitBuffer >> 24);
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#endif /* DEBUG_PUTBITS */
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*ld->Ptr++ = ld->BitBuffer >> 24;
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ld->BitBuffer <<= 8;
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ld->Remaining += 8;
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}
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ld->Remaining = 32;
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ld->BitBuffer = 0;
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}
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