| // 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_ |