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input_stream: add method _cheap_seeking()

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Move code from the Vorbis decoder plugin.
This commit is contained in:
Max Kellermann 2013-01-07 23:23:58 +01:00
parent acb45caa42
commit 960b9a9664
4 changed files with 17 additions and 3 deletions
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2
Makefile.am
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@ -1063,6 +1063,7 @@ test_run_input_SOURCES = test/run_input.c \
src/io_thread.c src/io_thread.h \
src/conf.c src/tokenizer.c src/utils.c src/string_util.c\
src/Tag.cxx src/TagNames.c src/TagPool.cxx src/TagSave.cxx \
src/uri.c \
src/fd_util.c
test_dump_text_file_LDADD = \
@ -1075,6 +1076,7 @@ test_dump_text_file_SOURCES = test/dump_text_file.c \
src/conf.c src/tokenizer.c src/utils.c src/string_util.c\
src/Tag.cxx src/TagNames.c src/TagPool.cxx \
src/text_input_stream.c src/fifo_buffer.c \
src/uri.c \
src/fd_util.c
test_dump_playlist_LDADD = \

4
src/decoder/VorbisDecoderPlugin.cxx
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@ -139,9 +139,7 @@ vorbis_is_open(struct vorbis_input_stream *vis, OggVorbis_File *vf,
{
vis->decoder = decoder;
vis->input_stream = input_stream;
vis->seekable = input_stream->seekable &&
(input_stream->uri == NULL ||
!uri_has_scheme(input_stream->uri));
vis->seekable = input_stream_cheap_seeking(input_stream);
int ret = ov_open_callbacks(vis, vf, NULL, 0, vorbis_is_callbacks);
if (ret < 0) {

7
src/input_stream.c
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@ -22,6 +22,7 @@
#include "input_registry.h"
#include "input_plugin.h"
#include "input/rewind_input_plugin.h"
#include "uri.h"
#include <glib.h>
#include <assert.h>
@ -114,6 +115,12 @@ input_stream_lock_wait_ready(struct input_stream *is)
g_mutex_unlock(is->mutex);
}
bool
input_stream_cheap_seeking(const struct input_stream *is)
{
return is->seekable && (is->uri == NULL || !uri_has_scheme(is->uri));
}
bool
input_stream_seek(struct input_stream *is, goffset offset, int whence,
GError **error_r)

7
src/input_stream.h
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@ -167,6 +167,13 @@ gcc_nonnull(1)
void
input_stream_lock_wait_ready(struct input_stream *is);
/**
* Determines whether seeking is cheap. This is true for local files.
*/
gcc_pure gcc_nonnull(1)
bool
input_stream_cheap_seeking(const struct input_stream *is);
/**
* Seeks to the specified position in the stream. This will most
* likely fail if the "seekable" flag is false.