Revert 152406 - Introduce shared_memory_support media target for PPAPI.

media/audio/audio_util.h

 // 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.
 
 #ifndef MEDIA_AUDIO_AUDIO_UTIL_H_
 #define MEDIA_AUDIO_AUDIO_UTIL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 93 matching lines @@
 MEDIA_EXPORT size_t GetAudioHardwareBufferSize();
 
 // Returns the channel layout for the specified audio input device.
 MEDIA_EXPORT ChannelLayout GetAudioInputHardwareChannelLayout(
     const std::string& device_id);
 
 // Computes a buffer size based on the given |sample_rate|. Must be used in
 // conjunction with AUDIO_PCM_LINEAR.
 MEDIA_EXPORT size_t GetHighLatencyOutputBufferSize(int sample_rate);
 
+// Functions that handle data buffer passed between processes in the shared
+// memory. Called on both IPC sides.
+
+MEDIA_EXPORT uint32 TotalSharedMemorySizeInBytes(uint32 packet_size);
+MEDIA_EXPORT uint32 PacketSizeSizeInBytes(uint32 shared_memory_created_size);
+MEDIA_EXPORT uint32 GetActualDataSizeInBytes(base::SharedMemory* shared_memory,
+                                             uint32 shared_memory_size);
+MEDIA_EXPORT void SetActualDataSizeInBytes(base::SharedMemory* shared_memory,
+                                           uint32 shared_memory_size,
+                                           uint32 actual_data_size);
+MEDIA_EXPORT void SetUnknownDataSize(base::SharedMemory* shared_memory,
+                                     uint32 shared_memory_size);
+MEDIA_EXPORT bool IsUnknownDataSize(base::SharedMemory* shared_memory,
+                                    uint32 shared_memory_size);
+
 #if defined(OS_WIN)
 
 // Does Windows support WASAPI? We are checking in lot of places, and
 // sometimes check was written incorrectly, so move into separate function.
 MEDIA_EXPORT bool IsWASAPISupported();
 
 // Returns number of buffers to be used by wave out.
 MEDIA_EXPORT int NumberOfWaveOutBuffers();
 
 #endif  // defined(OS_WIN)
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_UTIL_H_