media/base/media_util.h

// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MEDIA_BASE_MEDIA_UTIL_H_
#define MEDIA_BASE_MEDIA_UTIL_H_

#include <stdint.h>
#include <vector>

#include "media/base/audio_codecs.h"
#include "media/base/audio_parameters.h"
#include "media/base/media_export.h"
#include "media/base/media_log.h"

namespace media {

// Simply returns an empty vector. {Audio|Video}DecoderConfig are often
// constructed with empty extra data.
MEDIA_EXPORT std::vector<uint8_t> EmptyExtraData();

class MEDIA_EXPORT NullMediaLog : public media::MediaLog {
 public:
  NullMediaLog() = default;

  NullMediaLog(const NullMediaLog&) = delete;
  NullMediaLog& operator=(const NullMediaLog&) = delete;

  ~NullMediaLog() override = default;

  void AddLogRecordLocked(
      std::unique_ptr<media::MediaLogRecord> event) override {}
};

// Converts Audio Codec Type to Bitstream Format.
MEDIA_EXPORT AudioParameters::Format ConvertAudioCodecToBitstreamFormat(
    media::AudioCodec codec);

// Returns true if tracing is enabled for the media category.
MEDIA_EXPORT bool MediaTraceIsEnabled();
}  // namespace media

#endif  // MEDIA_BASE_MEDIA_UTIL_H_