From fa13095a5db7c1eb9b04e3adaf95423819fa62b0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Axelsson?= <gecko@acc.umu.se>
Date: Mon, 17 Dec 2007 09:28:46 +0000
Subject: [PATCH] =?UTF-8?q?Enable=20av=5Fread=5Fpause(),=20av=5Fread=5Fpla?=
 =?UTF-8?q?y()=20and=20the=20ASF=20demuxer's=20av=5Fread=5Fseek()=20to=20u?=
 =?UTF-8?q?se=20the=20protocol-native=20functionality=20if=20available.=20?=
 =?UTF-8?q?Patch=20by=20Bj=C3=B6rn=20Axelsson:=20bjorn=20point=20axelsson?=
 =?UTF-8?q?=20at=20intinor=20dot=20se=20Original=20thread:=20[FFmpeg-devel?=
 =?UTF-8?q?]=20[PATCH][4/4]=20Enable=20use=20of=20the=20extended=20API=20D?=
 =?UTF-8?q?ate:=20Thu=20Nov=2022=2016:01:06=20CET=202007?=
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Originally committed as revision 11248 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavformat/asf.c   |  8 ++++++++
 libavformat/utils.c | 16 ++++++++++------
 2 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/libavformat/asf.c b/libavformat/asf.c
index b2f54d9639..2316ed570f 100644
--- a/libavformat/asf.c
+++ b/libavformat/asf.c
@@ -1049,6 +1049,14 @@ static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int
     if (asf->packet_size <= 0)
         return -1;
 
+    /* Try using the protocol's read_seek if available */
+    if(s->pb && s->pb->read_seek) {
+        int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
+        if(ret >= 0)
+            asf_reset_header(s);
+        return ret;
+    }
+
     if (!asf->index_read)
         asf_build_simple_index(s, stream_index);
 
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 3cd07552c5..7ab8d7e1e6 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -2030,16 +2030,20 @@ int av_find_stream_info(AVFormatContext *ic)
 
 int av_read_play(AVFormatContext *s)
 {
-    if (!s->iformat->read_play)
-        return AVERROR(ENOSYS);
-    return s->iformat->read_play(s);
+    if (s->iformat->read_play)
+        return s->iformat->read_play(s);
+    if (s->pb && s->pb->read_play)
+        return av_url_read_fplay(s->pb);
+    return AVERROR(ENOSYS);
 }
 
 int av_read_pause(AVFormatContext *s)
 {
-    if (!s->iformat->read_pause)
-        return AVERROR(ENOSYS);
-    return s->iformat->read_pause(s);
+    if (s->iformat->read_pause)
+        return s->iformat->read_pause(s);
+    if (s->pb && s->pb->read_pause)
+        return av_url_read_fpause(s->pb);
+    return AVERROR(ENOSYS);
 }
 
 void av_close_input_file(AVFormatContext *s)