From 536333a0fe2e20bd7314a589635f08a451d1e12e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Axelsson?= <gecko@acc.umu.se>
Date: Sat, 24 Nov 2007 07:09:32 +0000
Subject: [PATCH] Extend URLProtocol with new function pointers and api
functions for av_url_read_play(), av_url_read_pause() and av_url_read_seek().
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patch by: Björn Axelsson, bjorn d axelsson a intinor d se
Originally committed as revision 11086 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavformat/avio.c | 22 ++++++++++++++++++++++
libavformat/avio.h | 30 ++++++++++++++++++++++++++++++
2 files changed, 52 insertions(+)
diff --git a/libavformat/avio.c b/libavformat/avio.c
index 793f8ab1f40..234a99a15d8 100644
--- a/libavformat/avio.c
+++ b/libavformat/avio.c
@@ -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);
+}
diff --git a/libavformat/avio.h b/libavformat/avio.h
index 89a347b78fd..138508ed1cf 100644
--- a/libavformat/avio.h
+++ b/libavformat/avio.h
@@ -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;
--
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