media: Reland "Simplify {Audio|Video}Decoder initialization callback."

media/filters/vpx_video_decoder.cc

 // Copyright (c) 2012 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/filters/vpx_video_decoder.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 191 matching lines @@
   DCHECK(task_runner_->BelongsToCurrentThread());
   CloseDecoder();
 }
 
 std::string VpxVideoDecoder::GetDisplayName() const {
   return "VpxVideoDecoder";
 }
 
 void VpxVideoDecoder::Initialize(const VideoDecoderConfig& config,
                                  bool low_delay,
-                                 const PipelineStatusCB& status_cb,
+                                 const InitCB& init_cb,
                                  const OutputCB& output_cb) {
   DCHECK(task_runner_->BelongsToCurrentThread());
   DCHECK(config.IsValidConfig());
   DCHECK(!config.is_encrypted());
   DCHECK(decode_cb_.is_null());
 
+  InitCB bound_init_cb = BindToCurrentLoop(init_cb);
+
   if (!ConfigureDecoder(config)) {
-    status_cb.Run(DECODER_ERROR_NOT_SUPPORTED);
+    bound_init_cb.Run(false);
     return;
   }
 
   // Success!
   config_ = config;
   state_ = kNormal;
   output_cb_ = BindToCurrentLoop(output_cb);
-  status_cb.Run(PIPELINE_OK);
+  bound_init_cb.Run(true);
 }
 
 static vpx_codec_ctx* InitializeVpxContext(vpx_codec_ctx* context,
                                            const VideoDecoderConfig& config) {
   context = new vpx_codec_ctx();
   vpx_codec_dec_cfg_t vpx_config = {0};
   vpx_config.w = config.coded_size().width();
   vpx_config.h = config.coded_size().height();
   vpx_config.threads = GetThreadCount(config);
 
@@ skipping 285 matching lines @@
         vpx_image->stride[VPX_PLANE_Y], vpx_image->d_h, video_frame->get());
     return;
   }
   CopyAPlane(vpx_image_alpha->planes[VPX_PLANE_Y],
              vpx_image_alpha->stride[VPX_PLANE_Y],
              vpx_image_alpha->d_h,
              video_frame->get());
 }
 
 }  // namespace media