| // Copyright 2014 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 <linux/videodev2.h> |
| |
| #include "base/numerics/safe_conversions.h" |
| #include "content/common/gpu/media/exynos_v4l2_video_device.h" |
| #include "content/common/gpu/media/tegra_v4l2_video_device.h" |
| |
| namespace content { |
| |
| V4L2Device::~V4L2Device() {} |
| |
| // static |
| scoped_ptr<V4L2Device> V4L2Device::Create(Type type) { |
| DVLOG(3) << __PRETTY_FUNCTION__; |
| |
| scoped_ptr<ExynosV4L2Device> exynos_device(new ExynosV4L2Device(type)); |
| if (exynos_device->Initialize()) |
| return exynos_device.Pass(); |
| |
| scoped_ptr<TegraV4L2Device> tegra_device(new TegraV4L2Device(type)); |
| if (tegra_device->Initialize()) |
| return tegra_device.Pass(); |
| |
| LOG(ERROR) << "Failed to create V4L2Device"; |
| return scoped_ptr<V4L2Device>(); |
| } |
| |
| // static |
| media::VideoFrame::Format V4L2Device::V4L2PixFmtToVideoFrameFormat( |
| uint32 pix_fmt) { |
| switch (pix_fmt) { |
| case V4L2_PIX_FMT_NV12: |
| case V4L2_PIX_FMT_NV12M: |
| return media::VideoFrame::NV12; |
| |
| case V4L2_PIX_FMT_YUV420: |
| case V4L2_PIX_FMT_YUV420M: |
| return media::VideoFrame::I420; |
| |
| default: |
| LOG(FATAL) << "Add more cases as needed"; |
| return media::VideoFrame::UNKNOWN; |
| } |
| } |
| |
| // static |
| uint32 V4L2Device::VideoFrameFormatToV4L2PixFmt( |
| media::VideoFrame::Format format) { |
| switch (format) { |
| case media::VideoFrame::NV12: |
| return V4L2_PIX_FMT_NV12M; |
| |
| case media::VideoFrame::I420: |
| return V4L2_PIX_FMT_YUV420M; |
| |
| default: |
| LOG(FATAL) << "Add more cases as needed"; |
| return 0; |
| } |
| } |
| |
| // static |
| uint32 V4L2Device::VideoCodecProfileToV4L2PixFmt( |
| media::VideoCodecProfile profile) { |
| if (profile >= media::H264PROFILE_MIN && |
| profile <= media::H264PROFILE_MAX) { |
| return V4L2_PIX_FMT_H264; |
| } else if (profile >= media::VP8PROFILE_MIN && |
| profile <= media::VP8PROFILE_MAX) { |
| return V4L2_PIX_FMT_VP8; |
| } else { |
| LOG(FATAL) << "Add more cases as needed"; |
| return 0; |
| } |
| } |
| |
| // static |
| gfx::Size V4L2Device::CodedSizeFromV4L2Format(struct v4l2_format format) { |
| gfx::Size coded_size; |
| gfx::Size visible_size; |
| media::VideoFrame::Format frame_format = media::VideoFrame::UNKNOWN; |
| int bytesperline = 0; |
| int sizeimage = 0; |
| |
| if (V4L2_TYPE_IS_MULTIPLANAR(format.type) && |
| format.fmt.pix_mp.num_planes > 0) { |
| bytesperline = |
| base::checked_cast<int>(format.fmt.pix_mp.plane_fmt[0].bytesperline); |
| sizeimage = |
| base::checked_cast<int>(format.fmt.pix_mp.plane_fmt[0].sizeimage); |
| visible_size.SetSize(base::checked_cast<int>(format.fmt.pix_mp.width), |
| base::checked_cast<int>(format.fmt.pix_mp.height)); |
| frame_format = |
| V4L2Device::V4L2PixFmtToVideoFrameFormat(format.fmt.pix_mp.pixelformat); |
| } else { |
| bytesperline = base::checked_cast<int>(format.fmt.pix.bytesperline); |
| sizeimage = base::checked_cast<int>(format.fmt.pix.sizeimage); |
| visible_size.SetSize(base::checked_cast<int>(format.fmt.pix.width), |
| base::checked_cast<int>(format.fmt.pix.height)); |
| frame_format = |
| V4L2Device::V4L2PixFmtToVideoFrameFormat(format.fmt.pix.pixelformat); |
| } |
| |
| int horiz_bpp = |
| media::VideoFrame::PlaneHorizontalBitsPerPixel(frame_format, 0); |
| DVLOG(3) << __func__ << ": bytesperline=" << bytesperline |
| << ", sizeimage=" << sizeimage |
| << ", visible_size=" << visible_size.ToString() << ", frame_format=" |
| << media::VideoFrame::FormatToString(frame_format) |
| << ", horiz_bpp=" << horiz_bpp; |
| if (sizeimage == 0 || bytesperline == 0 || horiz_bpp == 0 || |
| (bytesperline * 8) % horiz_bpp != 0) { |
| LOG(ERROR) << "Invalid format provided"; |
| return coded_size; |
| } |
| |
| // Round up sizeimage to full bytesperlines. sizeimage does not have to be |
| // a multiple of bytesperline, as in V4L2 terms it's just a byte size of |
| // the buffer, unrelated to its payload. |
| sizeimage = ((sizeimage + bytesperline - 1) / bytesperline) * bytesperline; |
| |
| coded_size.SetSize(bytesperline * 8 / horiz_bpp, sizeimage / bytesperline); |
| DVLOG(3) << "coded_size=" << coded_size.ToString(); |
| |
| // Sanity checks. Calculated coded size has to contain given visible size |
| // and fulfill buffer byte size requirements for each plane. |
| DCHECK(gfx::Rect(coded_size).Contains(gfx::Rect(visible_size))); |
| |
| if (V4L2_TYPE_IS_MULTIPLANAR(format.type)) { |
| for (size_t i = 0; i < format.fmt.pix_mp.num_planes; ++i) { |
| DCHECK_EQ(format.fmt.pix_mp.plane_fmt[i].bytesperline, |
| base::checked_cast<__u32>(media::VideoFrame::RowBytes( |
| i, frame_format, coded_size.width()))); |
| } |
| } |
| |
| return coded_size; |
| } |
| |
| } // namespace content |