H264 HW encode using VideoToolbox

media/base/mac/videotoolbox_helpers.h

 // Copyright 2016 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.
 
-#ifndef IOS_CHROME_BROWSER_UI_WEBUI_HISTORY_METRICS_HANDLER_H_
-#define IOS_CHROME_BROWSER_UI_WEBUI_HISTORY_METRICS_HANDLER_H_
+#ifndef MEDIA_BASE_MAC_VIDEOTOOLBOX_HELPERS_H_
+#define MEDIA_BASE_MAC_VIDEOTOOLBOX_HELPERS_H_
 
-#include "base/compiler_specific.h"
-#include "base/macros.h"
-#include "ios/public/provider/web/web_ui_ios_message_handler.h"
+#include "base/mac/scoped_cftyperef.h"
+#include "media/base/mac/videotoolbox_glue.h"
+#include "media/base/media_export.h"
 
-///////////////////////////////////////////////////////////////////////////////
-// MetricsHandler
+namespace media {
 
-// Let the page contents record UMA actions. Only use when you can't do it from
-// C++. For example, we currently use it to let the NTP log the position of the
-// Most Visited or Bookmark the user clicked on, as we don't get that
-// information through RequestOpenURL. You will need to update the metrics
-// dashboard with the action names you use, as our processor won't catch that
-// information (treat it as RecordComputedMetrics)
+MEDIA_EXPORT base::ScopedCFTypeRef<CFDictionaryRef>
+DictionaryWithKeysAndValues(CFTypeRef* keys, CFTypeRef* values, size_t size);

[miu, 2016/02/04 22:23:20]

All of these functions are VT-specific, but have rather generalized-sounding
names.  Could you put everything in this file in, say, a video_toolbox
namespace?

  namespace media {
  namespace video_toolbox {
  ...functions...
  }  // namespace video_toolbox
  }  // namespace media

[miu, 2016/02/04 22:23:20]

Also, throughout this file, can you please add a comment to explain what each
function does?

[emircan, 2016/02/07 04:24:06]

Done.

[emircan, 2016/02/07 04:24:06]

Done.

 
-namespace base {
-class ListValue;
-}
+MEDIA_EXPORT base::ScopedCFTypeRef<CFDictionaryRef> DictionaryWithKeyValue(
+    CFTypeRef key,
+    CFTypeRef value);
 
-class MetricsHandler : public web::WebUIIOSMessageHandler {
- public:
-  MetricsHandler();
-  ~MetricsHandler() override;
+MEDIA_EXPORT base::ScopedCFTypeRef<CFArrayRef> ArrayWithIntegers(const int* v,
+                                                                 size_t size);
 
-  // WebUIIOSMessageHandler implementation.
-  void RegisterMessages() override;
+template <typename NalSizeType>
+MEDIA_EXPORT void CopyNalsToAnnexB(char* avcc_buffer,
+                                   const size_t avcc_size,
+                                   std::string* annexb_buffer);
 
-  // Callback for the "metricsHandler:recordAction" message. This records a
-  // user action.
-  void HandleRecordAction(const base::ListValue* args);
+MEDIA_EXPORT void CopySampleBufferToAnnexBBuffer(
+    CoreMediaGlue::CMSampleBufferRef sbuf,
+    std::string* annexb_buffer,
+    bool keyframe);
 
-  // TODO(dbeam): http://crbug.com/104338
+using VTCompressionSessionRef = VideoToolboxGlue::VTCompressionSessionRef;

[miu, 2016/02/04 22:23:20]

style guide violation: Please remove this.  Better to be more specific and use
the fully-qualified name in header files, anyways.  ;)

[emircan, 2016/02/07 04:24:06]

Done.

 
-  // Callback for the "metricsHandler:recordInHistogram" message. This records
-  // into a histogram. |args| contains the histogram name, the value to record,
-  // and the maximum allowed value, which can be at most 4000. The histogram
-  // will use at most 100 buckets, one for each 1, 10, or 100 different values,
-  // depending on the maximum value.
-  void HandleRecordInHistogram(const base::ListValue* args);
+MEDIA_EXPORT bool SetSessionProperty(
+    base::ScopedCFTypeRef<VTCompressionSessionRef> session,
+    const VideoToolboxGlue* const glue,
+    CFStringRef key,
+    int32_t value);
 
- private:
-  DISALLOW_COPY_AND_ASSIGN(MetricsHandler);
-};
+MEDIA_EXPORT bool SetSessionProperty(
+    base::ScopedCFTypeRef<VTCompressionSessionRef> session,
+    const VideoToolboxGlue* const glue,
+    CFStringRef key,
+    bool value);
 
-#endif  // IOS_CHROME_BROWSER_UI_WEBUI_HISTORY_METRICS_HANDLER_H_
+MEDIA_EXPORT bool SetSessionProperty(
+    base::ScopedCFTypeRef<VTCompressionSessionRef> session,
+    const VideoToolboxGlue* const glue,
+    CFStringRef key,
+    CFStringRef value);
+
+}  // namespace media
+
+#endif  // MEDIA_BASE_MAC_VIDEOTOOLBOX_HELPERS_H_