MJPEG acceleration for V4L2

content/browser/renderer_host/gpu_jpeg_decoder.cc

 // Copyright 2015 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 "content/browser/renderer_host/gpu_jpeg_decoder.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
 #include "base/trace_event/trace_event.h"
 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
 #include "content/common/gpu/client/gpu_jpeg_decode_accelerator_host.h"
 #include "content/public/browser/browser_thread.h"
 #include "media/base/video_frame.h"
 
 namespace content {
 
 // static
 bool GpuJpegDecoder::Supported() {
 // A lightweight check for caller to avoid IPC latency for known unsupported
 // platform. Initialize() can do the real platform supporting check but it
 // requires an IPC even for platforms that do not support HW decoder.
 // TODO(kcwu): move this information to GpuInfo.
 #if defined(OS_CHROMEOS) && defined(ARCH_CPU_X86_FAMILY)
   return true;
+#elif defined(OS_CHROMEOS) && defined(USE_V4L2_CODEC)

[wuchengli, 2015/05/25 10:29:23]

Can we do this?
#if defined(OS_CHROMEOS)
#if defined(ARCH_CPU_X86_FAMILY) || defined(USE_V4L2_CODEC)
return true;
#endif
#endif

[henryhsu, 2015/06/05 03:28:55]

Because veyron and nyan series don't support JPEG HW decode yet, I prefer to
keep original method.
ARM platform will be false in this CL.

+  return true;
 #endif
   return false;
 }
 
 GpuJpegDecoder::GpuJpegDecoder(const DecodeDoneCB& decode_done_cb,
                                const ErrorCB& error_cb)
     : jpeg_thread_("GpuJpegDecoderThread"),
       create_event_(false, false),
       decode_event_(false, false),
       decode_done_cb_(decode_done_cb),
@@ skipping 169 matching lines @@
   DCHECK(out_frame.get());
   out_frame->metadata()->SetDouble(media::VideoFrameMetadata::FRAME_RATE,
                                    frame_format.frame_rate);
 
   decode_done_closure_ = base::Bind(decode_done_cb_, base::Passed(&out_buffer),
                                     out_frame, timestamp);
   decoder_->Decode(in_buffer_, out_frame);
 }
 
 }  // namespace content