content/common/gpu/media/vaapi_jpeg_decoder.h

   1 // Copyright 2015 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 CONTENT_COMMON_GPU_MEDIA_VAAPI_JPEG_DECODER_H_
   6 #define CONTENT_COMMON_GPU_MEDIA_VAAPI_JPEG_DECODER_H_
   7
   8 #include "base/macros.h"
   9 #include "content/common/content_export.h"
  10 #include "content/common/gpu/media/vaapi_wrapper.h"
  11
  12 namespace media {
  13 struct JpegParseResult;
  14 }  // namespace media
  15
  16 namespace content {
  17
  18 // A JPEG decoder that utilizes VA-API hardware video decode acceleration on
  19 // Intel systems. Provides functionality to allow plugging VAAPI HW
  20 // acceleration into the JpegDecodeAccelerator framework.
  21 //
  22 // Clients of this class are expected to manage VA surfaces created via
  23 // VaapiWrapper, parse JPEG picture via media::ParseJpegPicture, and then pass
  24 // them to this class.
  25 class CONTENT_EXPORT VaapiJpegDecoder {
  26  public:
  27   // Decode a JPEG picture. It will fill VA-API parameters and call
  28   // corresponding VA-API methods according to parsed JPEG result
  29   // |parse_result|. Decoded data will be outputted to the given |va_surface|.
  30   // Return false on failure.
  31   // |vaapi_wrapper| should be initialized in kDecode mode with
  32   // VAProfileJPEGBaseline profile.
  33   // |va_surface| should be created with size at least as large as the picture
  34   // size.
  35   static bool Decode(VaapiWrapper* vaapi_wrapper,
  36                      const media::JpegParseResult& parse_result,
  37                      VASurfaceID va_surface);
  38
  39  private:
  40   DISALLOW_IMPLICIT_CONSTRUCTORS(VaapiJpegDecoder);
  41 };
  42
  43 }  // namespace content
  44
  45 #endif  // CONTENT_COMMON_GPU_MEDIA_VAAPI_JPEG_DECODER_H_