From 66e9e302394553fca0ebb6d25bb211cbdb4887f0 Mon Sep 17 00:00:00 2001
From: Ivo van Poorten <ivop@euronet.nl>
Date: Mon, 7 Jan 2008 23:32:57 +0000
Subject: [PATCH] Move parsing of MPEG-PES timestamp to mpeg.h (as an inline
 function) so it can easily be reused by other demuxers for formats that
 encapsulate MPEG-PES.

Originally committed as revision 11451 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavformat/mpeg.c | 17 ++++++-----------
 libavformat/mpeg.h |  9 +++++++++
 2 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/libavformat/mpeg.c b/libavformat/mpeg.c
index 3101c2a30f..d044d07f41 100644
--- a/libavformat/mpeg.c
+++ b/libavformat/mpeg.c
@@ -120,17 +120,12 @@ static int mpegps_read_header(AVFormatContext *s,
 
 static int64_t get_pts(ByteIOContext *pb, int c)
 {
-    int64_t pts;
-    int val;
-
-    if (c < 0)
-        c = get_byte(pb);
-    pts = (int64_t)(c & 0x0e) << 29;
-    val = get_be16(pb);
-    pts |= (int64_t)(val >> 1) << 15;
-    val = get_be16(pb);
-    pts |= (int64_t)(val >> 1);
-    return pts;
+    uint8_t buf[5];
+
+    buf[0] = c<0 ? get_byte(pb) : c;
+    get_buffer(pb, buf+1, 4);
+
+    return ff_parse_pes_pts(buf);
 }
 
 static int find_next_start_code(ByteIOContext *pb, int *size_ptr,
diff --git a/libavformat/mpeg.h b/libavformat/mpeg.h
index 053b1590ea..9283101d10 100644
--- a/libavformat/mpeg.h
+++ b/libavformat/mpeg.h
@@ -57,4 +57,13 @@
 
 static const int lpcm_freq_tab[4] = { 48000, 96000, 44100, 32000 };
 
+/**
+ * Parse MPEG-PES five-byte timestamp
+ */
+static inline int64_t ff_parse_pes_pts(uint8_t *buf) {
+    return (int64_t)(*buf & 0x0e) << 29 |
+            (AV_RB16(buf+1) >> 1) << 15 |
+             AV_RB16(buf+3) >> 1;
+}
+
 #endif /* FFMPEG_MPEG_H */
-- 
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