| // Copyright 2019 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_PARSERS_WEBP_PARSER_H_ |
| #define MEDIA_PARSERS_WEBP_PARSER_H_ |
| |
| #include <stdint.h> |
| #include <memory> |
| |
| #include "base/containers/span.h" |
| #include "media/parsers/media_parsers_export.h" |
| |
| namespace media { |
| |
| struct Vp8FrameHeader; |
| |
| // A lightweight WebP file header parser to extract feature and size |
| // information. It validates that a given data stream encodes a simple lossy |
| // WebP image and populates a Vp8FrameHeader upon successful parsing. |
| // For more information, see the WebP Container Specification: |
| // https://developers.google.com/speed/webp/docs/riff_container |
| |
| // Returns true if |encoded_data| claims to encode a simple (non-extended) lossy |
| // WebP image. Returns false otherwise. |
| MEDIA_PARSERS_EXPORT |
| bool IsLossyWebPImage(base::span<const uint8_t> encoded_data); |
| |
| // Parses a simple (non-extended) lossy WebP image and returns a Vp8FrameHeader |
| // containing the parsed VP8 frame contained by the image. Returns nullptr on |
| // failure. |
| MEDIA_PARSERS_EXPORT |
| std::unique_ptr<Vp8FrameHeader> ParseWebPImage( |
| base::span<const uint8_t> encoded_data); |
| |
| } // namespace media |
| |
| #endif // MEDIA_PARSERS_WEBP_PARSER_H_ |
