1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef MEDIA_WEBM_WEBM_VIDEO_CLIENT_H_ 6 #define MEDIA_WEBM_WEBM_VIDEO_CLIENT_H_ 7 8 #include <string> 9 #include <vector> 10 11 #include "media/base/media_log.h" 12 #include "media/webm/webm_parser.h" 13 14 namespace media { 15 class VideoDecoderConfig; 16 17 // Helper class used to parse a Video element inside a TrackEntry element. 18 class WebMVideoClient : public WebMParserClient { 19 public: 20 explicit WebMVideoClient(const LogCB& log_cb); 21 virtual ~WebMVideoClient(); 22 23 // Reset this object's state so it can process a new video track element. 24 void Reset(); 25 26 // Initialize |config| with the data in |codec_id|, |codec_private|, 27 // |is_encrypted| and the fields parsed from the last video track element this 28 // object was used to parse. 29 // Returns true if |config| was successfully initialized. 30 // Returns false if there was unexpected values in the provided parameters or 31 // video track element fields. The contents of |config| are undefined in this 32 // case and should not be relied upon. 33 bool InitializeConfig(const std::string& codec_id, 34 const std::vector<uint8>& codec_private, 35 bool is_encrypted, 36 VideoDecoderConfig* config); 37 38 private: 39 // WebMParserClient implementation. 40 virtual bool OnUInt(int id, int64 val) OVERRIDE; 41 virtual bool OnBinary(int id, const uint8* data, int size) OVERRIDE; 42 virtual bool OnFloat(int id, double val) OVERRIDE; 43 44 LogCB log_cb_; 45 int64 pixel_width_; 46 int64 pixel_height_; 47 int64 crop_bottom_; 48 int64 crop_top_; 49 int64 crop_left_; 50 int64 crop_right_; 51 int64 display_width_; 52 int64 display_height_; 53 int64 display_unit_; 54 int64 alpha_mode_; 55 56 DISALLOW_COPY_AND_ASSIGN(WebMVideoClient); 57 }; 58 59 } // namespace media 60 61 #endif // MEDIA_WEBM_WEBM_VIDEO_CLIENT_H_ 62
