EVEA H.264: Disable periodic key frames by default.

content/common/gpu/media/exynos_video_encode_accelerator.cc

 // Copyright 2013 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 "content/common/gpu/media/exynos_video_encode_accelerator.h"
 
 #include <fcntl.h>
 #include <linux/videodev2.h>
 #include <poll.h>
 #include <sys/eventfd.h>
@@ skipping 1346 matching lines @@
   format.fmt.pix_mp.height      = output_visible_size_.height();
   format.fmt.pix_mp.pixelformat = output_format_fourcc_;
   format.fmt.pix_mp.plane_fmt[0].sizeimage = output_buffer_byte_size_;
   format.fmt.pix_mp.num_planes  = 1;
   IOCTL_OR_ERROR_RETURN_FALSE(mfc_fd_, VIDIOC_S_FMT, &format);
 
   return true;
 }
 
 bool ExynosVideoEncodeAccelerator::InitMfcControls() {
-  struct v4l2_ext_control ctrls[8];
+  struct v4l2_ext_control ctrls[9];
   struct v4l2_ext_controls control;
   memset(&ctrls, 0, sizeof(ctrls));
   memset(&control, 0, sizeof(control));
   // No B-frames, for lowest decoding latency.
   ctrls[0].id    = V4L2_CID_MPEG_VIDEO_B_FRAMES;
   ctrls[0].value = 0;
   // Enable frame-level bitrate control.
   ctrls[1].id    = V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE;
   ctrls[1].value = 1;
   // Enable "tight" bitrate mode. For this to work properly, frame- and mb-level
   // bitrate controls have to be enabled as well.
   ctrls[2].id    = V4L2_CID_MPEG_MFC51_VIDEO_RC_REACTION_COEFF;
   ctrls[2].value = 1;
   // Force bitrate control to average over a GOP (for tight bitrate
   // tolerance).
   ctrls[3].id    = V4L2_CID_MPEG_MFC51_VIDEO_RC_FIXED_TARGET_BIT;
   ctrls[3].value = 1;
   // Quantization parameter maximum value (for variable bitrate control).
   ctrls[4].id    = V4L2_CID_MPEG_VIDEO_H264_MAX_QP;
   ctrls[4].value = 51;
   // Separate stream header so we can cache it and insert into the stream.
   ctrls[5].id    = V4L2_CID_MPEG_VIDEO_HEADER_MODE;
   ctrls[5].value = V4L2_MPEG_VIDEO_HEADER_MODE_SEPARATE;
   // Enable macroblock-level bitrate control.
   ctrls[6].id    = V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE;
   ctrls[6].value = 1;
   // Use H.264 level 4.0 to match the supported max resolution.
   ctrls[7].id    = V4L2_CID_MPEG_VIDEO_H264_LEVEL;
   ctrls[7].value = V4L2_MPEG_VIDEO_H264_LEVEL_4_0;
+  // Disable periodic key frames.
+  ctrls[8].id    = V4L2_CID_MPEG_VIDEO_GOP_SIZE;
+  ctrls[8].value = 0;
   control.ctrl_class = V4L2_CTRL_CLASS_MPEG;
   control.count = arraysize(ctrls);
   control.controls = ctrls;
   IOCTL_OR_ERROR_RETURN_FALSE(mfc_fd_, VIDIOC_S_EXT_CTRLS, &control);
 
   return true;
 }
 
 bool ExynosVideoEncodeAccelerator::CreateMfcInputBuffers() {
   DVLOG(3) << "CreateMfcInputBuffers()";
@@ skipping 146 matching lines @@
   reqbufs.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
   reqbufs.memory = V4L2_MEMORY_MMAP;
   if (HANDLE_EINTR(ioctl(mfc_fd_, VIDIOC_REQBUFS, &reqbufs)) != 0)
     DPLOG(ERROR) << "DestroyMfcOutputBuffers(): ioctl() failed: VIDIOC_REQBUFS";
 
   mfc_output_buffer_map_.clear();
   mfc_free_output_buffers_.clear();
 }
 
 }  // namespace content