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// Copyright 2014 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_FORMATS_WEBM_WEBM_AUDIO_CLIENT_H_
#define MEDIA_FORMATS_WEBM_WEBM_AUDIO_CLIENT_H_
#include <stdint.h>
#include <string>
#include <vector>
#include "base/macros.h"
#include "media/base/media_log.h"
#include "media/formats/webm/webm_parser.h"
namespace media {
class AudioDecoderConfig;
class EncryptionScheme;
// Helper class used to parse an Audio element inside a TrackEntry element.
class WebMAudioClient : public WebMParserClient {
public:
explicit WebMAudioClient(const scoped_refptr<MediaLog>& media_log);
~WebMAudioClient() override;
// Reset this object's state so it can process a new audio track element.
void Reset();
// Initialize |config| with the data in |codec_id|, |codec_private|,
// |encryption_scheme| and the fields parsed from the last audio track element
// this object was used to parse.
// Returns true if |config| was successfully initialized.
// Returns false if there was unexpected values in the provided parameters or
// audio track element fields.
bool InitializeConfig(const std::string& codec_id,
const std::vector<uint8_t>& codec_private,
const int64_t seek_preroll,
const int64_t codec_delay,
const EncryptionScheme& encryption_scheme,
AudioDecoderConfig* config);
private:
// WebMParserClient implementation.
bool OnUInt(int id, int64_t val) override;
bool OnFloat(int id, double val) override;
scoped_refptr<MediaLog> media_log_;
int channels_;
double samples_per_second_;
double output_samples_per_second_;
DISALLOW_COPY_AND_ASSIGN(WebMAudioClient);
};
} // namespace media
#endif // MEDIA_FORMATS_WEBM_WEBM_AUDIO_CLIENT_H_
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