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// Copyright (c) 2011 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_AUDIO_DECODER_CONFIG_H_
#define MEDIA_BASE_AUDIO_DECODER_CONFIG_H_
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "media/base/channel_layout.h"
#include "media/base/media_export.h"
namespace media {
enum AudioCodec {
// These values are histogrammed over time; do not change their ordinal
// values. When deleting a codec replace it with a dummy value; when adding a
// codec, do so at the bottom (and update kAudioCodecMax).
kUnknownAudioCodec = 0,
kCodecAAC,
kCodecMP3,
kCodecPCM,
kCodecVorbis,
// ChromiumOS and ChromeOS specific codecs.
kCodecFLAC,
// ChromeOS specific codecs.
kCodecAMR_NB,
kCodecAMR_WB,
kCodecPCM_MULAW,
// DO NOT ADD RANDOM AUDIO CODECS!
//
// The only acceptable time to add a new codec is if there is production code
// that uses said codec in the same CL.
kAudioCodecMax = kCodecPCM_MULAW // Must equal the last "real" codec above.
};
class MEDIA_EXPORT AudioDecoderConfig {
public:
// Constructs an uninitialized object. Clients should call Initialize() with
// appropriate values before using.
AudioDecoderConfig();
// Constructs an initialized object. It is acceptable to pass in NULL for
// |extra_data|, otherwise the memory is copied.
AudioDecoderConfig(AudioCodec codec, int bits_per_channel,
ChannelLayout channel_layout, int samples_per_second,
const uint8* extra_data, size_t extra_data_size);
~AudioDecoderConfig();
// Resets the internal state of this object.
void Initialize(AudioCodec codec, int bits_per_channel,
ChannelLayout channel_layout, int samples_per_second,
const uint8* extra_data, size_t extra_data_size);
// Returns true if this object has appropriate configuration values, false
// otherwise.
bool IsValidConfig() const;
AudioCodec codec() const;
int bits_per_channel() const;
ChannelLayout channel_layout() const;
int samples_per_second() const;
// Optional byte data required to initialize audio decoders such as Vorbis
// codebooks.
uint8* extra_data() const;
size_t extra_data_size() const;
private:
AudioCodec codec_;
int bits_per_channel_;
ChannelLayout channel_layout_;
int samples_per_second_;
scoped_array<uint8> extra_data_;
size_t extra_data_size_;
DISALLOW_COPY_AND_ASSIGN(AudioDecoderConfig);
};
} // namespace media
#endif // MEDIA_BASE_AUDIO_DECODER_CONFIG_H_
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