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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 
00029 typedef struct AVFifoBuffer {
00030     uint8_t *buffer;
00031     uint8_t *rptr, *wptr, *end;
00032     uint32_t rndx, wndx;
00033 } AVFifoBuffer;
00034 
00040 AVFifoBuffer *av_fifo_alloc(unsigned int size);
00041 
00046 void av_fifo_free(AVFifoBuffer *f);
00047 
00052 void av_fifo_reset(AVFifoBuffer *f);
00053 
00060 int av_fifo_size(AVFifoBuffer *f);
00061 
00068 int av_fifo_space(AVFifoBuffer *f);
00069 
00077 int av_fifo_generic_read(AVFifoBuffer *f, void *dest, int buf_size, void (*func)(void*, void*, int));
00078 
00092 int av_fifo_generic_write(AVFifoBuffer *f, void *src, int size, int (*func)(void*, void*, int));
00093 
00100 int av_fifo_realloc2(AVFifoBuffer *f, unsigned int size);
00101 
00107 void av_fifo_drain(AVFifoBuffer *f, int size);
00108 
00109 static inline uint8_t av_fifo_peek(AVFifoBuffer *f, int offs)
00110 {
00111     uint8_t *ptr = f->rptr + offs;
00112     if (ptr >= f->end)
00113         ptr -= f->end - f->buffer;
00114     return *ptr;
00115 }
00116 #endif /* AVUTIL_FIFO_H */

Generated on Fri Sep 16 2011 17:17:51 for FFmpeg by  doxygen 1.7.1