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// Copyright 2016 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef STARBOARD_SHARED_STARBOARD_PLAYER_FILTER_AUDIO_DECODER_INTERNAL_H_
#define STARBOARD_SHARED_STARBOARD_PLAYER_FILTER_AUDIO_DECODER_INTERNAL_H_
#include <vector>
#include "starboard/media.h"
#include "starboard/shared/internal_only.h"
#include "starboard/shared/starboard/player/input_buffer_internal.h"
#include "starboard/types.h"
namespace starboard {
namespace shared {
namespace starboard {
namespace player {
namespace filter {
// This class decodes encoded audio stream into playable audio data.
class AudioDecoder {
public:
virtual ~AudioDecoder() {}
// Decode the encoded audio data stored in |input_buffer| and store the
// result in |output|.
virtual void Decode(const InputBuffer& input_buffer,
std::vector<uint8_t>* output) = 0;
// Note that there won't be more input data unless Reset() is called.
virtual void WriteEndOfStream() = 0;
// Clear any cached buffer of the codec and reset the state of the codec.
// This function will be called during seek to ensure that the left over
// data from previous buffers are cleared.
virtual void Reset() = 0;
// Return the sample type of the decoded pcm data.
virtual SbMediaAudioSampleType GetSampleType() const = 0;
// Return the sample rate of the incoming audio. This should be used by the
// audio renderer as the sample rate of the underlying audio stream can be
// different than the sample rate stored in the meta data.
virtual int GetSamplesPerSecond() const = 0;
// Individual implementation has to implement this function to create an
// audio decoder.
static AudioDecoder* Create(SbMediaAudioCodec audio_codec,
const SbMediaAudioHeader& audio_header);
};
} // namespace filter
} // namespace player
} // namespace starboard
} // namespace shared
} // namespace starboard
#endif // STARBOARD_SHARED_STARBOARD_PLAYER_FILTER_AUDIO_DECODER_INTERNAL_H_