87 lines
2.4 KiB
C++
87 lines
2.4 KiB
C++
// Copyright 2014 Google Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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#ifndef MEDIA_BASE_AUDIO_STREAM_INFO_H_
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#define MEDIA_BASE_AUDIO_STREAM_INFO_H_
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#include <vector>
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#include "media/base/stream_info.h"
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namespace media {
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enum AudioCodec {
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kUnknownAudioCodec = 0,
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kCodecAAC,
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kCodecMP3,
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kCodecPCM,
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kCodecVorbis,
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kCodecFLAC,
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kCodecAMR_NB,
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kCodecAMR_WB,
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kCodecPCM_MULAW,
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kCodecGSM_MS,
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kCodecPCM_S16BE,
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kCodecPCM_S24BE,
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kCodecOpus,
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kCodecEAC3,
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kNumAudioCodec
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};
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/// Holds audio stream information.
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class AudioStreamInfo : public StreamInfo {
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public:
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/// Construct an initialized audio stream info object.
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AudioStreamInfo(int track_id,
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uint32 time_scale,
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uint64 duration,
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AudioCodec codec,
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const std::string& codec_string,
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const std::string& language,
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uint8 sample_bits,
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uint8 num_channels,
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uint32 sampling_frequency,
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const uint8* extra_data,
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size_t extra_data_size,
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bool is_encrypted);
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/// @name StreamInfo implementation overrides.
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/// @{
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virtual bool IsValidConfig() const OVERRIDE;
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virtual std::string ToString() const OVERRIDE;
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/// @}
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AudioCodec codec() const { return codec_; }
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uint8 sample_bits() const { return sample_bits_; }
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uint8 sample_bytes() const { return sample_bits_ / 8; }
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uint8 num_channels() const { return num_channels_; }
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uint32 sampling_frequency() const { return sampling_frequency_; }
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uint32 bytes_per_frame() const {
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return static_cast<uint32>(num_channels_) * sample_bits_ / 8;
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}
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/// @param audio_object_type is only used by AAC Codec, ignored otherwise.
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/// @return The codec string.
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static std::string GetCodecString(AudioCodec codec, uint8 audio_object_type);
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private:
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virtual ~AudioStreamInfo();
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AudioCodec codec_;
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uint8 sample_bits_;
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uint8 num_channels_;
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uint32 sampling_frequency_;
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// Not using DISALLOW_COPY_AND_ASSIGN here intentionally to allow the compiler
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// generated copy constructor and assignment operator. Since the extra data is
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// typically small, the performance impact is minimal.
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};
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} // namespace media
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#endif // MEDIA_BASE_AUDIO_STREAM_INFO_H_
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