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avformat/avio: move short seek threshold to the context 

This allows us to adjust it internally.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-06-02 18:40:53 +02:00
parent 70af8a5efb
commit 4e640f0560
2 changed files with 8 additions and 1 deletions
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6
libavformat/avio.h
View File

@ -196,6 +196,12 @@ typedef struct AVIOContext {
* This field is internal to libavformat and access from outside is not allowed.
*/
int orig_buffer_size;
/**
* Threshold to favor readahead over seek.
* This is current internal only, do not use from outside.
*/
int short_seek_threshold;
} AVIOContext;
/* unbuffered I/O */

3
libavformat/aviobuf.c
View File

@ -97,6 +97,7 @@ int ffio_init_context(AVIOContext *s,
s->seekable = seek ? AVIO_SEEKABLE_NORMAL : 0;
s->max_packet_size = 0;
s->update_checksum = NULL;
s->short_seek_threshold = SHORT_SEEK_THRESHOLD;
if (!read_packet && !write_flag) {
s->pos = buffer_size;
@ -232,7 +233,7 @@ int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
/* can do the seek inside the buffer */
s->buf_ptr = s->buffer + offset1;
} else if ((!s->seekable ||
offset1 <= s->buf_end + SHORT_SEEK_THRESHOLD - s->buffer) &&
offset1 <= s->buf_end + s->short_seek_threshold - s->buffer) &&
!s->write_flag && offset1 >= 0 &&
(!s->direct || !s->seek) &&
(whence != SEEK_END || force)) {