16 bit capture and GPU&CPU memory buffer support.

media/capture/video/blob_utils.cc

-// Copyright 2016 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.
-
-#include "media/capture/video/blob_utils.h"
-
-#include "media/base/video_capture_types.h"
-#include "media/base/video_frame.h"
-#include "third_party/libyuv/include/libyuv.h"
-#include "third_party/skia/include/core/SkImage.h"
-#include "ui/gfx/codec/png_codec.h"
-
-namespace media {
-
-mojom::BlobPtr Blobify(const uint8_t* buffer,
-                       const uint32_t bytesused,
-                       const VideoCaptureFormat& capture_format) {
-  DCHECK(buffer);
-  DCHECK(bytesused);
-  DCHECK(capture_format.IsValid());
-
-  const VideoPixelFormat pixel_format = capture_format.pixel_format;
-  if (pixel_format == VideoPixelFormat::PIXEL_FORMAT_MJPEG) {
-    mojom::BlobPtr blob = mojom::Blob::New();
-    blob->data.resize(bytesused);
-    memcpy(blob->data.data(), buffer, bytesused);
-    blob->mime_type = "image/jpeg";
-    return blob;
-  }
-
-  uint32_t src_format;
-  if (pixel_format == VideoPixelFormat::PIXEL_FORMAT_UYVY)
-    src_format = libyuv::FOURCC_UYVY;
-  else if (pixel_format == VideoPixelFormat::PIXEL_FORMAT_YUY2)
-    src_format = libyuv::FOURCC_YUY2;
-  else if (pixel_format == VideoPixelFormat::PIXEL_FORMAT_I420)
-    src_format = libyuv::FOURCC_I420;
-  else if (pixel_format == VideoPixelFormat::PIXEL_FORMAT_RGB24)
-    src_format = libyuv::FOURCC_24BG;
-  else
-    return nullptr;
-
-  const gfx::Size frame_size = capture_format.frame_size;
-  // PNGCodec does not support YUV formats, convert to a temporary ARGB buffer.
-  std::unique_ptr<uint8_t[]> tmp_argb(
-      new uint8_t[VideoFrame::AllocationSize(PIXEL_FORMAT_ARGB, frame_size)]);
-  if (ConvertToARGB(buffer, bytesused, tmp_argb.get(), frame_size.width() * 4,
-                    0 /* crop_x_pos */, 0 /* crop_y_pos */, frame_size.width(),
-                    frame_size.height(), frame_size.width(),
-                    frame_size.height(), libyuv::RotationMode::kRotate0,
-                    src_format) != 0) {
-    return nullptr;
-  }
-
-  mojom::BlobPtr blob = mojom::Blob::New();
-  const gfx::PNGCodec::ColorFormat codec_color_format =
-      (kN32_SkColorType == kRGBA_8888_SkColorType) ? gfx::PNGCodec::FORMAT_RGBA
-                                                   : gfx::PNGCodec::FORMAT_BGRA;
-  const bool result = gfx::PNGCodec::Encode(
-      tmp_argb.get(), codec_color_format, frame_size, frame_size.width() * 4,
-      true /* discard_transparency */, std::vector<gfx::PNGCodec::Comment>(),
-      &blob->data);
-  DCHECK(result);
-
-  blob->mime_type = "image/png";
-  return blob;
-}
-
-}  // namespace media