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Extend URLProtocol with new function pointers and api functions for

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av_url_read_play(), av_url_read_pause() and av_url_read_seek().

patch by: Björn Axelsson, bjorn d axelsson a intinor d se

Originally committed as revision 11086 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Björn Axelsson 2007-11-24 07:09:32 +00:00 committed by Andreas Öman
parent 23c0634c78
commit 536333a0fe
2 changed files with 52 additions and 0 deletions
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22
libavformat/avio.c
View File

@ -187,3 +187,25 @@ void url_set_interrupt_cb(URLInterruptCB *interrupt_cb)
interrupt_cb = default_interrupt_cb;
url_interrupt_cb = interrupt_cb;
}
int av_url_read_play(URLContext *h)
{
if (!h->prot->url_read_play)
return AVERROR(ENOSYS);
return h->prot->url_read_play(h);
}
int av_url_read_pause(URLContext *h)
{
if (!h->prot->url_read_pause)
return AVERROR(ENOSYS);
return h->prot->url_read_pause(h);
}
int av_url_read_seek(URLContext *h,
int stream_index, int64_t timestamp, int flags)
{
if (!h->prot->url_read_seek)
return AVERROR(ENOSYS);
return h->prot->url_read_seek(h, stream_index, timestamp, flags);
}

30
libavformat/avio.h
View File

@ -86,6 +86,32 @@ void url_set_interrupt_cb(URLInterruptCB *interrupt_cb);
/* not implemented */
int url_poll(URLPollEntry *poll_table, int n, int timeout);
/** Start playing or resume paused playout. Only meaningful if using a network
* streaming protocol (e.g. MMS). */
int av_url_read_play(URLContext *h);
/** Pause playing - only meaningful if using a network streaming protocol
* (e.g. MMS). */
int av_url_read_pause(URLContext *h);
/**
* Seek to a given timestamp relative to some component stream.
* Only meaningful if using a network streaming protocol (e.g. MMS.)
* @param stream_index The stream index that the timestamp is relative to.
* If stream_index is (-1) the timestamp should be in AV_TIME_BASE
* units from the beginning of the presentation.
* If a stream_index >= 0 is used and the protocol does not support
* seeking based on component streams, the call will fail with ENOTSUP.
* @param time_stamp timestamp timestamp in AVStream.time_base units
* or if there is no stream specified then in AV_TIME_BASE units.
* @param flags Optional combination of AVSEEK_FLAG_BACKWARD, AVSEEK_FLAG_BYTE
* and AVSEEK_FLAG_ANY. The protocol may silently ignore
* AVSEEK_FLAG_BACKWARD and AVSEEK_FLAG_ANY, but AVSEEK_FLAG_BYTE will
* fail with ENOTSUP if used and not supported.
* @return >= 0 on success
* @see AVInputFormat::read_seek
*/
int av_url_read_seek(URLContext *h,
int stream_index, int64_t timestamp, int flags);
/**
* Passing this as the "whence" parameter to a seek function causes it to
* return the filesize without seeking anywhere. Supporting this is optional.
@ -101,6 +127,10 @@ typedef struct URLProtocol {
offset_t (*url_seek)(URLContext *h, offset_t pos, int whence);
int (*url_close)(URLContext *h);
struct URLProtocol *next;
int (*url_read_play)(URLContext *h);
int (*url_read_pause)(URLContext *h);
int (*url_read_seek)(URLContext *h,
int stream_index, int64_t timestamp, int flags);
} URLProtocol;
extern URLProtocol *first_protocol;