Libav
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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 */