Reland of Split iOS sdk in to separate targets

webrtc/sdk/objc/Framework/Classes/Video/corevideo_frame_buffer.cc

Index: webrtc/sdk/objc/Framework/Classes/Video/corevideo_frame_buffer.cc
diff --git a/webrtc/sdk/objc/Framework/Classes/Video/corevideo_frame_buffer.cc b/webrtc/sdk/objc/Framework/Classes/Video/corevideo_frame_buffer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9593d13b341223a3f1ca6de95a54cc495fc48a43
--- /dev/null
+++ b/webrtc/sdk/objc/Framework/Classes/Video/corevideo_frame_buffer.cc
@@ -0,0 +1,149 @@
+/*
+ *  Copyright 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/sdk/objc/Framework/Classes/Video/corevideo_frame_buffer.h"
+
+#include "libyuv/convert.h"
+#include "webrtc/api/video/i420_buffer.h"
+#include "webrtc/base/checks.h"
+#include "webrtc/base/logging.h"
+#include "webrtc/common_video/libyuv/include/webrtc_libyuv.h"
+
+namespace webrtc {
+
+CoreVideoFrameBuffer::CoreVideoFrameBuffer(CVPixelBufferRef pixel_buffer,
+                                           int adapted_width,
+                                           int adapted_height,
+                                           int crop_width,
+                                           int crop_height,
+                                           int crop_x,
+                                           int crop_y)
+    : NativeHandleBuffer(pixel_buffer, adapted_width, adapted_height),
+      pixel_buffer_(pixel_buffer),
+      buffer_width_(CVPixelBufferGetWidth(pixel_buffer)),
+      buffer_height_(CVPixelBufferGetHeight(pixel_buffer)),
+      crop_width_(crop_width), crop_height_(crop_height),
+      // Can only crop at even pixels.
+      crop_x_(crop_x & ~1), crop_y_(crop_y & ~1) {
+  CVBufferRetain(pixel_buffer_);
+}
+
+CoreVideoFrameBuffer::CoreVideoFrameBuffer(CVPixelBufferRef pixel_buffer)
+    : NativeHandleBuffer(pixel_buffer,
+                         CVPixelBufferGetWidth(pixel_buffer),
+                         CVPixelBufferGetHeight(pixel_buffer)),
+      pixel_buffer_(pixel_buffer),
+      buffer_width_(width_), buffer_height_(height_),
+      crop_width_(width_), crop_height_(height_),
+      crop_x_(0), crop_y_(0) {
+  CVBufferRetain(pixel_buffer_);
+}
+
+CoreVideoFrameBuffer::~CoreVideoFrameBuffer() {
+  CVBufferRelease(pixel_buffer_);
+}
+
+rtc::scoped_refptr<VideoFrameBuffer>
+CoreVideoFrameBuffer::NativeToI420Buffer() {
+  const OSType pixel_format = CVPixelBufferGetPixelFormatType(pixel_buffer_);
+  RTC_DCHECK(pixel_format == kCVPixelFormatType_420YpCbCr8BiPlanarFullRange ||
+             pixel_format == kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange);
+
+  CVPixelBufferLockBaseAddress(pixel_buffer_, kCVPixelBufferLock_ReadOnly);
+  const uint8_t* src_y = static_cast<const uint8_t*>(
+      CVPixelBufferGetBaseAddressOfPlane(pixel_buffer_, 0));
+  const int src_y_stride = CVPixelBufferGetBytesPerRowOfPlane(pixel_buffer_, 0);
+  const uint8_t* src_uv = static_cast<const uint8_t*>(
+      CVPixelBufferGetBaseAddressOfPlane(pixel_buffer_, 1));
+  const int src_uv_stride =
+      CVPixelBufferGetBytesPerRowOfPlane(pixel_buffer_, 1);
+
+  // Crop just by modifying pointers.
+  src_y += src_y_stride * crop_y_ + crop_x_;
+  src_uv += src_uv_stride * (crop_y_ / 2) + crop_x_;
+
+  // TODO(magjed): Use a frame buffer pool.
+  NV12ToI420Scaler nv12_to_i420_scaler;
+  rtc::scoped_refptr<I420Buffer> buffer =
+      new rtc::RefCountedObject<I420Buffer>(width_, height_);
+  nv12_to_i420_scaler.NV12ToI420Scale(
+      src_y, src_y_stride,
+      src_uv, src_uv_stride,
+      crop_width_, crop_height_,
+      buffer->MutableDataY(), buffer->StrideY(),
+      buffer->MutableDataU(), buffer->StrideU(),
+      buffer->MutableDataV(), buffer->StrideV(),
+      buffer->width(), buffer->height());
+
+  CVPixelBufferUnlockBaseAddress(pixel_buffer_, kCVPixelBufferLock_ReadOnly);
+
+  return buffer;
+}
+
+bool CoreVideoFrameBuffer::RequiresCropping() const {
+  return crop_width_ != buffer_width_ || crop_height_ != buffer_height_;
+}
+
+bool CoreVideoFrameBuffer::CropAndScaleTo(
+    std::vector<uint8_t>* tmp_buffer,
+    CVPixelBufferRef output_pixel_buffer) const {
+  // Prepare output pointers.
+  RTC_DCHECK_EQ(CVPixelBufferGetPixelFormatType(output_pixel_buffer),
+                kCVPixelFormatType_420YpCbCr8BiPlanarFullRange);
+  CVReturn cv_ret = CVPixelBufferLockBaseAddress(output_pixel_buffer, 0);
+  if (cv_ret != kCVReturnSuccess) {
+    LOG(LS_ERROR) << "Failed to lock base address: " << cv_ret;
+    return false;
+  }
+  const int dst_width = CVPixelBufferGetWidth(output_pixel_buffer);
+  const int dst_height = CVPixelBufferGetHeight(output_pixel_buffer);
+  uint8_t* dst_y = reinterpret_cast<uint8_t*>(
+      CVPixelBufferGetBaseAddressOfPlane(output_pixel_buffer, 0));
+  const int dst_y_stride =
+      CVPixelBufferGetBytesPerRowOfPlane(output_pixel_buffer, 0);
+  uint8_t* dst_uv = reinterpret_cast<uint8_t*>(
+      CVPixelBufferGetBaseAddressOfPlane(output_pixel_buffer, 1));
+  const int dst_uv_stride =
+      CVPixelBufferGetBytesPerRowOfPlane(output_pixel_buffer, 1);
+
+  // Prepare source pointers.
+  const OSType src_pixel_format =
+      CVPixelBufferGetPixelFormatType(pixel_buffer_);
+  RTC_DCHECK(
+      src_pixel_format == kCVPixelFormatType_420YpCbCr8BiPlanarFullRange ||
+      src_pixel_format == kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange);
+  CVPixelBufferLockBaseAddress(pixel_buffer_, kCVPixelBufferLock_ReadOnly);
+  const uint8_t* src_y = static_cast<const uint8_t*>(
+      CVPixelBufferGetBaseAddressOfPlane(pixel_buffer_, 0));
+  const int src_y_stride = CVPixelBufferGetBytesPerRowOfPlane(pixel_buffer_, 0);
+  const uint8_t* src_uv = static_cast<const uint8_t*>(
+      CVPixelBufferGetBaseAddressOfPlane(pixel_buffer_, 1));
+  const int src_uv_stride =
+      CVPixelBufferGetBytesPerRowOfPlane(pixel_buffer_, 1);
+
+  // Crop just by modifying pointers.
+  src_y += src_y_stride * crop_y_ + crop_x_;
+  src_uv += src_uv_stride * (crop_y_ / 2) + crop_x_;
+
+  NV12Scale(tmp_buffer,
+            src_y, src_y_stride,
+            src_uv, src_uv_stride,
+            crop_width_, crop_height_,
+            dst_y, dst_y_stride,
+            dst_uv, dst_uv_stride,
+            dst_width, dst_height);
+
+  CVPixelBufferUnlockBaseAddress(pixel_buffer_, kCVPixelBufferLock_ReadOnly);
+  CVPixelBufferUnlockBaseAddress(output_pixel_buffer, 0);
+
+  return true;
+}
+
+}  // namespace webrtc