Support multiple video decoders and encoders

content/common/gpu/media/v4l2_video_decode_accelerator.cc

 // Copyright 2014 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 <dlfcn.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/videodev2.h>
 #include <poll.h>
 #include <sys/eventfd.h>
@@ skipping 580 matching lines @@
         return;
     }
   }
   if (decoder_state_ == kError) {
     // Failed during decode.
     return;
   }
 
   if (schedule_task) {
     decoder_current_bitstream_buffer_->bytes_used += decoded_size;
-    if (decoder_current_bitstream_buffer_->bytes_used ==
+    if ((size_t)decoder_current_bitstream_buffer_->bytes_used ==

[Pawel Osciak, 2014/12/26 01:11:36]

Please not c-style casts.
Instead, please change bytes_used to size_t.

[henryhsu, 2014/12/26 08:40:41]

Done.

         decoder_current_bitstream_buffer_->size) {
       // Our current bitstream buffer is done; return it.
       int32 input_id = decoder_current_bitstream_buffer_->input_id;
       DVLOG(3) << "DecodeBufferTask(): finished input_id=" << input_id;
       // BitstreamBufferRef destructor calls NotifyEndOfBitstreamBuffer().
       decoder_current_bitstream_buffer_.reset();
     }
     ScheduleDecodeBufferTaskIfNeeded();
   }
 }
@@ skipping 1322 matching lines @@
   gfx::Size new_size(base::checked_cast<int>(format.fmt.pix_mp.width),
                      base::checked_cast<int>(format.fmt.pix_mp.height));
   if (frame_buffer_size_ != new_size) {
     DVLOG(3) << "IsResolutionChangeNecessary(): Resolution change detected";
     return true;
   }
   return false;
 }
 
 }  // namespace content