diff options
Diffstat (limited to 'libav/common.c')
| -rw-r--r-- | libav/common.c | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/libav/common.c b/libav/common.c deleted file mode 100644 index e60b0dd85b..0000000000 --- a/libav/common.c +++ /dev/null @@ -1,174 +0,0 @@ -/* - * Common bit/dsp utils - * Copyright (c) 2000 Gerard Lantau. - * - * 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 of the License, 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 this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <netinet/in.h> -#include <math.h> -#include "common.h" - -#define NDEBUG -#include <assert.h> - -void init_put_bits(PutBitContext *s, - UINT8 *buffer, int buffer_size, - void *opaque, - void (*write_data)(void *, UINT8 *, int)) -{ - s->buf = buffer; - s->buf_ptr = s->buf; - s->buf_end = s->buf + buffer_size; - s->bit_cnt=0; - s->bit_buf=0; - s->data_out_size = 0; - s->write_data = write_data; - s->opaque = opaque; -} - -static void flush_buffer(PutBitContext *s) -{ - int size; - if (s->write_data) { - size = s->buf_ptr - s->buf; - if (size > 0) - s->write_data(s->opaque, s->buf, size); - s->buf_ptr = s->buf; - s->data_out_size += size; - } -} - -void put_bits(PutBitContext *s, int n, unsigned int value) -{ - unsigned int bit_buf; - int bit_cnt; - - assert(n == 32 || value < (1U << n)); - - bit_buf = s->bit_buf; - bit_cnt = s->bit_cnt; - - // printf("n=%d value=%x cnt=%d buf=%x\n", n, value, bit_cnt, bit_buf); - /* XXX: optimize */ - if (n < (32-bit_cnt)) { - bit_buf |= value << (32 - n - bit_cnt); - bit_cnt+=n; - } else { - bit_buf |= value >> (n + bit_cnt - 32); - *(UINT32 *)s->buf_ptr = htonl(bit_buf); - //printf("bitbuf = %08x\n", bit_buf); - s->buf_ptr+=4; - if (s->buf_ptr >= s->buf_end) - flush_buffer(s); - bit_cnt=bit_cnt + n - 32; - if (bit_cnt == 0) { - bit_buf = 0; - } else { - bit_buf = value << (32 - bit_cnt); - } - } - - s->bit_buf = bit_buf; - s->bit_cnt = bit_cnt; -} - -/* return the number of bits output */ -long long get_bit_count(PutBitContext *s) -{ - return (s->buf_ptr - s->buf + s->data_out_size) * 8 + (long long)s->bit_cnt; -} - -void align_put_bits(PutBitContext *s) -{ - put_bits(s,(8 - s->bit_cnt) & 7,0); -} - -/* pad the end of the output stream with zeros */ -void flush_put_bits(PutBitContext *s) -{ - while (s->bit_cnt > 0) { - /* XXX: should test end of buffer */ - *s->buf_ptr++=s->bit_buf >> 24; - s->bit_buf<<=8; - s->bit_cnt-=8; - } - flush_buffer(s); - s->bit_cnt=0; - s->bit_buf=0; -} - -/* for jpeg : espace 0xff with 0x00 after it */ -void jput_bits(PutBitContext *s, int n, unsigned int value) -{ - unsigned int bit_buf, b; - int bit_cnt, i; - - assert(n == 32 || value < (1U << n)); - - bit_buf = s->bit_buf; - bit_cnt = s->bit_cnt; - - //printf("n=%d value=%x cnt=%d buf=%x\n", n, value, bit_cnt, bit_buf); - /* XXX: optimize */ - if (n < (32-bit_cnt)) { - bit_buf |= value << (32 - n - bit_cnt); - bit_cnt+=n; - } else { - bit_buf |= value >> (n + bit_cnt - 32); - /* handle escape */ - for(i=0;i<4;i++) { - b = (bit_buf >> 24); - *(s->buf_ptr++) = b; - if (b == 0xff) - *(s->buf_ptr++) = 0; - bit_buf <<= 8; - } - /* we flush the buffer sooner to handle worst case */ - if (s->buf_ptr >= (s->buf_end - 8)) - flush_buffer(s); - - bit_cnt=bit_cnt + n - 32; - if (bit_cnt == 0) { - bit_buf = 0; - } else { - bit_buf = value << (32 - bit_cnt); - } - } - - s->bit_buf = bit_buf; - s->bit_cnt = bit_cnt; -} - -/* pad the end of the output stream with zeros */ -void jflush_put_bits(PutBitContext *s) -{ - unsigned int b; - - while (s->bit_cnt > 0) { - b = s->bit_buf >> 24; - *s->buf_ptr++ = b; - if (b == 0xff) - *s->buf_ptr++ = 0; - s->bit_buf<<=8; - s->bit_cnt-=8; - } - flush_buffer(s); - s->bit_cnt=0; - s->bit_buf=0; -} - |