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Diffstat (limited to 'contrib/ffmpeg/libavutil/fifo.c')
-rw-r--r-- | contrib/ffmpeg/libavutil/fifo.c | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/contrib/ffmpeg/libavutil/fifo.c b/contrib/ffmpeg/libavutil/fifo.c deleted file mode 100644 index 8ac3a0cb5..000000000 --- a/contrib/ffmpeg/libavutil/fifo.c +++ /dev/null @@ -1,114 +0,0 @@ -/* - * A very simple circular buffer FIFO implementation - * Copyright (c) 2000, 2001, 2002 Fabrice Bellard - * Copyright (c) 2006 Roman Shaposhnik - * - * 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 - */ -#include "common.h" -#include "fifo.h" - -int av_fifo_init(AVFifoBuffer *f, int size) -{ - f->wptr = f->rptr = - f->buffer = av_malloc(size); - f->end = f->buffer + size; - if (!f->buffer) - return -1; - return 0; -} - -void av_fifo_free(AVFifoBuffer *f) -{ - av_free(f->buffer); -} - -int av_fifo_size(AVFifoBuffer *f) -{ - int size = f->wptr - f->rptr; - if (size < 0) - size += f->end - f->buffer; - return size; -} - -/** - * Get data from the fifo (returns -1 if not enough data). - */ -int av_fifo_read(AVFifoBuffer *f, uint8_t *buf, int buf_size) -{ - return av_fifo_generic_read(f, buf_size, NULL, buf); -} - -/** - * Resizes a FIFO. - */ -void av_fifo_realloc(AVFifoBuffer *f, unsigned int new_size) { - unsigned int old_size= f->end - f->buffer; - - if(old_size < new_size){ - int len= av_fifo_size(f); - AVFifoBuffer f2; - - av_fifo_init(&f2, new_size); - av_fifo_read(f, f2.buffer, len); - f2.wptr += len; - av_free(f->buffer); - *f= f2; - } -} - -void av_fifo_write(AVFifoBuffer *f, const uint8_t *buf, int size) -{ - do { - int len = FFMIN(f->end - f->wptr, size); - memcpy(f->wptr, buf, len); - f->wptr += len; - if (f->wptr >= f->end) - f->wptr = f->buffer; - buf += len; - size -= len; - } while (size > 0); -} - - -/** get data from the fifo (return -1 if not enough data) */ -int av_fifo_generic_read(AVFifoBuffer *f, int buf_size, void (*func)(void*, void*, int), void* dest) -{ - int size = av_fifo_size(f); - - if (size < buf_size) - return -1; - do { - int len = FFMIN(f->end - f->rptr, buf_size); - if(func) func(dest, f->rptr, len); - else{ - memcpy(dest, f->rptr, len); - dest = (uint8_t*)dest + len; - } - av_fifo_drain(f, len); - buf_size -= len; - } while (buf_size > 0); - return 0; -} - -/** discard data from the fifo */ -void av_fifo_drain(AVFifoBuffer *f, int size) -{ - f->rptr += size; - if (f->rptr >= f->end) - f->rptr -= f->end - f->buffer; -} |