debian/tmp/usr/include/libavutil/fifo.h
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00001 /*
00002  * This file is part of FFmpeg.
00003  *
00004  * FFmpeg is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU Lesser General Public
00006  * License as published by the Free Software Foundation; either
00007  * version 2.1 of the License, or (at your option) any later version.
00008  *
00009  * FFmpeg is distributed in the hope that it will be useful,
00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012  * Lesser General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU Lesser General Public
00015  * License along with FFmpeg; if not, write to the Free Software
00016  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00017  */
00018 
00024 #ifndef AVUTIL_FIFO_H
00025 #define AVUTIL_FIFO_H
00026 
00027 #include <stdint.h>
00028 #include "avutil.h"
00029 
00030 typedef struct AVFifoBuffer {
00031     uint8_t *buffer;
00032     uint8_t *rptr, *wptr, *end;
00033     uint32_t rndx, wndx;
00034 } AVFifoBuffer;
00035 
00041 AVFifoBuffer *av_fifo_alloc(unsigned int size);
00042 
00047 void av_fifo_free(AVFifoBuffer *f);
00048 
00053 void av_fifo_reset(AVFifoBuffer *f);
00054 
00061 int av_fifo_size(AVFifoBuffer *f);
00062 
00069 int av_fifo_space(AVFifoBuffer *f);
00070 
00078 int av_fifo_generic_read(AVFifoBuffer *f, void *dest, int buf_size, void (*func)(void*, void*, int));
00079 
00093 int av_fifo_generic_write(AVFifoBuffer *f, void *src, int size, int (*func)(void*, void*, int));
00094 
00103 int av_fifo_realloc2(AVFifoBuffer *f, unsigned int size);
00104 
00110 void av_fifo_drain(AVFifoBuffer *f, int size);
00111 
00122 static inline uint8_t *av_fifo_peek2(const AVFifoBuffer *f, int offs)
00123 {
00124     uint8_t *ptr = f->rptr + offs;
00125     if (ptr >= f->end)
00126         ptr = f->buffer + (ptr - f->end);
00127     else if (ptr < f->buffer)
00128         ptr = f->end - (f->buffer - ptr);
00129     return ptr;
00130 }
00131 
00132 #if FF_API_AV_FIFO_PEEK
00133 
00136 attribute_deprecated
00137 static inline uint8_t av_fifo_peek(AVFifoBuffer *f, int offs)
00138 {
00139     return *av_fifo_peek2(f, offs);
00140 }
00141 #endif
00142 
00143 #endif /* AVUTIL_FIFO_H */