/* * Common bit i/o utils * Copyright (c) 2000, 2001 Fabrice Bellard * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> * Copyright (c) 2010 Loren Merritt * * alternative bitstream reader & writer by Michael Niedermayer <michaelni@gmx.at> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * bitstream api. */ #include <stdint.h>#include <string.h> #include "config.h"#include "libavutil/avassert.h"#include "libavutil/intreadwrite.h"#include "put_bits.h" void ff_put_string(PutBitContext *pb, const char *string, int terminate_string){    while (*string) {        put_bits(pb, 8, *string);        string++;    }    if (terminate_string)        put_bits(pb, 8, 0);} void ff_copy_bits(PutBitContext *pb, const uint8_t *src, int length){    int words = length >> 4;    int bits  = length & 15;    int i;     if (length == 0)        return;     av_assert0(length <= put_bits_left(pb));     if (CONFIG_SMALL || words < 16 || put_bits_count(pb) & 7) {        for (i = 0; i < words; i++)            put_bits(pb, 16, AV_RB16(src + 2 * i));    } else {        for (i = 0; put_bits_count(pb) & 31; i++)            put_bits(pb, 8, src[i]);        flush_put_bits(pb);        memcpy(put_bits_ptr(pb), src + i, 2 * words - i);        skip_put_bytes(pb, 2 * words - i);    }     put_bits(pb, bits, AV_RB16(src + 2 * words) >> (16 - bits));}