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 MEDIA_BASE_MAC_VIDEOTOOLBOX_HELPERS_H_
+#define MEDIA_BASE_MAC_VIDEOTOOLBOX_HELPERS_H_
+
+#include "base/mac/scoped_cftyperef.h"
+#include "media/base/mac/videotoolbox_glue.h"
+#include "media/base/media_export.h"
+
+namespace media {
+
+MEDIA_EXPORT void CopySampleBufferToAnnexBBuffer(
+    CoreMediaGlue::CMSampleBufferRef sbuf,
+    std::string* annexb_buffer,
+    bool keyframe);
+
+template <typename NalSizeType>
+MEDIA_EXPORT void CopyNalsToAnnexB(char* avcc_buffer,
+                                   const size_t avcc_size,
+                                   std::string* annexb_buffer);
+
+MEDIA_EXPORT base::ScopedCFTypeRef<CFDictionaryRef>
+DictionaryWithKeysAndValues(CFTypeRef* keys, CFTypeRef* values, size_t size);
+
+MEDIA_EXPORT base::ScopedCFTypeRef<CFDictionaryRef> DictionaryWithKeyValue(
+    CFTypeRef key,
+    CFTypeRef value);
+
+MEDIA_EXPORT base::ScopedCFTypeRef<CFArrayRef> ArrayWithIntegers(const int* v,
+                                                                 size_t size);
+
+typedef VideoToolboxGlue::VTCompressionSessionRef VTCompressionSessionRef;
+
+MEDIA_EXPORT bool SetSessionProperty(
+    base::ScopedCFTypeRef<VTCompressionSessionRef> session,
+    const VideoToolboxGlue* const glue,
+    CFStringRef key,
+    int32_t value);
+
+MEDIA_EXPORT bool SetSessionProperty(
+    base::ScopedCFTypeRef<VTCompressionSessionRef> session,
+    const VideoToolboxGlue* const glue,
+    CFStringRef key,
+    bool value);
+
+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_