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Add a generic write function to av_fifo.

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Patch by Björn Axelsson: bjorn axelsson intinor se
Original thread: [FFmpeg-devel] [RFC][PATCH] av_fifo_write_from_bytestream()
Date: 04/03/2008 12:14 PM

Originally committed as revision 12773 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Björn Axelsson 2008-04-09 11:35:16 +00:00 committed by Benoit Fouet
parent 96275520a3
commit 49cec1998a
2 changed files with 28 additions and 2 deletions
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14
libavutil/fifo.c
View File

@ -73,15 +73,27 @@ void av_fifo_realloc(AVFifoBuffer *f, unsigned int new_size) {
void av_fifo_write(AVFifoBuffer *f, const uint8_t *buf, int size)
{
av_fifo_generic_write(f, (void *)buf, size, NULL);
}
int av_fifo_generic_write(AVFifoBuffer *f, void *buf, int size, int (*func)(void*, void*, int))
{
int total = size;
do {
int len = FFMIN(f->end - f->wptr, size);
if(func) {
if(func(buf, f->wptr, len) <= 0)
break;
} else {
memcpy(f->wptr, buf, len);
buf = (uint8_t*)buf + len;
}
f->wptr += len;
if (f->wptr >= f->end)
f->wptr = f->buffer;
buf += len;
size -= len;
} while (size > 0);
return total - size;
}

16
libavutil/fifo.h
View File

@ -76,7 +76,21 @@ int av_fifo_generic_read(AVFifoBuffer *f, int buf_size, void (*func)(void*, void
* @param *buf data source
* @param size data size
*/
void av_fifo_write(AVFifoBuffer *f, const uint8_t *buf, int size);
attribute_deprecated void av_fifo_write(AVFifoBuffer *f, const uint8_t *buf, int size);
/**
* Feeds data from a user supplied callback to an AVFifoBuffer.
* @param *f AVFifoBuffer to write to
* @param *buf data source
* @param size number of bytes to write
* @param *func generic write function. First parameter is buf,
* second is dest_buf, third is dest_buf_size.
* func must return the number of bytes written to dest_buf, or <= 0 to
* indicate no more data available to write.
* If func is NULL, buf is interpreted as a simple byte array for source data.
* @return the number of bytes written to the fifo.
*/
int av_fifo_generic_write(AVFifoBuffer *f, void *buf, int size, int (*func)(void*, void*, int));
/**
* Resizes an AVFifoBuffer.