| // 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 COBALT_MEDIA_FORMATS_WEBM_WEBM_AUDIO_CLIENT_H_ |
| #define COBALT_MEDIA_FORMATS_WEBM_WEBM_AUDIO_CLIENT_H_ |
| |
| #include <stdint.h> |
| |
| #include <string> |
| #include <vector> |
| |
| #include "base/basictypes.h" |
| #include "cobalt/media/base/media_log.h" |
| #include "cobalt/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 // COBALT_MEDIA_FORMATS_WEBM_WEBM_AUDIO_CLIENT_H_ |