H264POC: Allow gaps in frame_num.

media/gpu/vt_video_decode_accelerator_mac.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 "media/gpu/vt_video_decode_accelerator_mac.h"
 
 #include <CoreVideo/CoreVideo.h>
 #include <OpenGL/CGLIOSurface.h>
 #include <OpenGL/gl.h>
 #include <stddef.h>
@@ skipping 732 matching lines @@
                                 &data_size,  // &sample_size_array
                                 sample.InitializeInto());
   if (status) {
     NOTIFY_STATUS("CMSampleBufferCreate()", status, SFT_PLATFORM_ERROR);
     return;
   }
 
   // Send the frame for decoding.
   // Asynchronous Decompression allows for parallel submission of frames
   // (without it, DecodeFrame() does not return until the frame has been
-  // decoded). We don't enable Temporal Processing so that frames are always
-  // returned in decode order; this makes it easier to avoid deadlock.
+  // decoded). We don't enable Temporal Processing because we are not passing
+  // timestamps anyway.
   VTDecodeFrameFlags decode_flags =
       kVTDecodeFrame_EnableAsynchronousDecompression;
   status = VTDecompressionSessionDecodeFrame(
       session_,
       sample,                          // sample_buffer
       decode_flags,                    // decode_flags
       reinterpret_cast<void*>(frame),  // source_frame_refcon
       nullptr);                        // &info_flags_out
   if (status) {
     NOTIFY_STATUS("VTDecompressionSessionDecodeFrame()", status,
@@ skipping 376 matching lines @@
     SupportedProfile profile;
     profile.profile = supported_profile;
     profile.min_resolution.SetSize(16, 16);
     profile.max_resolution.SetSize(4096, 2160);
     profiles.push_back(profile);
   }
   return profiles;
 }
 
 }  // namespace media