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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_VIDEO_CLIENT_H_
#define MEDIA_FORMATS_WEBM_WEBM_VIDEO_CLIENT_H_
#include <stdint.h>
#include <string>
#include <vector>
#include "base/macros.h"
#include "media/base/media_log.h"
#include "media/formats/webm/webm_colour_parser.h"
#include "media/formats/webm/webm_parser.h"
namespace media {
class EncryptionScheme;
class VideoDecoderConfig;
// Helper class used to parse a Video element inside a TrackEntry element.
class WebMVideoClient : public WebMParserClient {
public:
explicit WebMVideoClient(MediaLog* media_log);
~WebMVideoClient() override;
// Reset this object's state so it can process a new video track element.
void Reset();
// Initialize |config| with the data in |codec_id|, |codec_private|,
// |encryption_scheme| and the fields parsed from the last video 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
// video track element fields. The contents of |config| are undefined in this
// case and should not be relied upon.
bool InitializeConfig(const std::string& codec_id,
const std::vector<uint8_t>& codec_private,
const EncryptionScheme& encryption_scheme,
VideoDecoderConfig* config);
private:
// WebMParserClient implementation.
WebMParserClient* OnListStart(int id) override;
bool OnListEnd(int id) override;
bool OnUInt(int id, int64_t val) override;
bool OnBinary(int id, const uint8_t* data, int size) override;
bool OnFloat(int id, double val) override;
MediaLog* media_log_;
int64_t pixel_width_;
int64_t pixel_height_;
int64_t crop_bottom_;
int64_t crop_top_;
int64_t crop_left_;
int64_t crop_right_;
int64_t display_width_;
int64_t display_height_;
int64_t display_unit_;
int64_t alpha_mode_;
WebMColourParser colour_parser_;
bool colour_parsed_ = false;
DISALLOW_COPY_AND_ASSIGN(WebMVideoClient);
};
} // namespace media
#endif // MEDIA_FORMATS_WEBM_WEBM_VIDEO_CLIENT_H_