Handle EINTR and remove offset_t in ffmpeg code.

media/filters/ffmpeg_glue.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/string_util.h"
 #include "media/base/filters.h"
 #include "media/ffmpeg/ffmpeg_common.h"
 #include "media/filters/ffmpeg_glue.h"
 
 namespace {
@@ skipping 21 matching lines @@
   if (result < 0)
     result = AVERROR_IO;
   return result;
 }
 
 int WriteContext(URLContext* h, unsigned char* buf, int size) {
   // We don't support writing.
   return AVERROR_IO;
 }
 
-offset_t SeekContext(URLContext* h, offset_t offset, int whence) {
+int64 SeekContext(URLContext* h, int64 offset, int whence) {
   media::FFmpegURLProtocol* protocol = ToProtocol(h->priv_data);
-  offset_t new_offset = AVERROR_IO;
+  int64 new_offset = AVERROR_IO;
   switch (whence) {
     case SEEK_SET:
       if (protocol->SetPosition(offset))
         protocol->GetPosition(&new_offset);
       break;
 
     case SEEK_CUR:
       int64 pos;
       if (!protocol->GetPosition(&pos))
         break;
@@ skipping 119 matching lines @@
 }
 
 std::string FFmpegGlue::GetProtocolKey(FFmpegURLProtocol* protocol) {
   // Use the FFmpegURLProtocol's memory address to generate the unique string.
   // This also has the nice property that adding the same FFmpegURLProtocol
   // reference will not generate duplicate entries.
   return StringPrintf("%s://%p", kProtocol, static_cast<void*>(protocol));
 }
 
 }  // namespace media