[FFmpeg-cvslog] yuv4mpeg: return proper error codes.

[Anton Khirnov]

ffmpeg | branch: release/0.7 | Anton Khirnov <anton at khirnov.net> | Fri Oct  5 15:53:32 2012 +0200| [5754176b5bfb4a298c376b4bdcce218848d15936] | committer: Reinhard Tartler

yuv4mpeg: return proper error codes.

Fixes Bug 373.

CC:libav-stable at libav.org
(cherry picked from commit d3a72becc6371563185a509b94f5daf32ddbb485)

Signed-off-by: Reinhard Tartler <siretart at tauware.de>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5754176b5bfb4a298c376b4bdcce218848d15936
---

 libavformat/yuv4mpeg.c |   22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/libavformat/yuv4mpeg.c b/libavformat/yuv4mpeg.c
index 9a6a0c8..dd785c6 100644
--- a/libavformat/yuv4mpeg.c
+++ b/libavformat/yuv4mpeg.c
@@ -347,7 +347,7 @@ static int yuv4_read_packet(AVFormatContext *s, AVPacket *pkt)
 {
     int i;
     char header[MAX_FRAME_HEADER+1];
-    int packet_size, width, height;
+    int packet_size, width, height, ret;
     AVStream *st = s->streams[0];
     struct frame_attributes *s1 = s->priv_data;
 
@@ -358,18 +358,28 @@ static int yuv4_read_packet(AVFormatContext *s, AVPacket *pkt)
             break;
         }
     }
-    if (i == MAX_FRAME_HEADER) return -1;
-    if (strncmp(header, Y4M_FRAME_MAGIC, strlen(Y4M_FRAME_MAGIC))) return -1;
+    if (s->pb->error)
+        return s->pb->error;
+    else if (s->pb->eof_reached)
+        return AVERROR_EOF;
+    else if (i == MAX_FRAME_HEADER)
+        return AVERROR_INVALIDDATA;
+
+    if (strncmp(header, Y4M_FRAME_MAGIC, strlen(Y4M_FRAME_MAGIC)))
+        return AVERROR_INVALIDDATA;
 
     width = st->codec->width;
     height = st->codec->height;
 
     packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
     if (packet_size < 0)
-        return -1;
+        return packet_size;
 
-    if (av_get_packet(s->pb, pkt, packet_size) != packet_size)
-        return AVERROR(EIO);
+    ret = av_get_packet(s->pb, pkt, packet_size);
+    if (ret < 0)
+        return ret;
+    else if (ret != packet_size)
+        return s->pb->eof_reached ? AVERROR_EOF : AVERROR(EIO);
 
     if (s->streams[0]->codec->coded_frame) {
         s->streams[0]->codec->coded_frame->interlaced_frame = s1->interlaced_frame;