/*
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* Copyright (c) 2021 by Allwinnertech Co., Ltd.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "stream_format.h"
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#include <linux/videodev2.h>
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#include <system/graphics.h>
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#include "v4l2_log.h"
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namespace v4l2_camera_hal {
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StreamFormat::StreamFormat(int format, uint32_t width, uint32_t height)
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// TODO(b/30000211): multiplanar support.
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: type_(V4L2_CAPTURE_TYPE),
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memory_(V4L2_MEMORY_MMAP),
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v4l2_pixel_format_(StreamFormat::HalToV4L2PixelFormat(format)),
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width_(width),
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height_(height),
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// Be compatibility with GPU, DE, VE, CSI, ISP.
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// Now we set the bytes_per_line_ as width
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// because the drivers return this one.
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bytes_per_line_(width) {}
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StreamFormat::StreamFormat(const v4l2_format& format, bool mergeStreamFlag)
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// be compatibility with multiplanar and single planar.
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: type_(format.type),
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memory_(V4L2_MEMORY_MMAP),
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nplanes_(format.fmt.pix_mp.num_planes),
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// TODO(b/30000211): multiplanar support.
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v4l2_pixel_format_(format.fmt.pix_mp.pixelformat),
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width_(format.fmt.pix_mp.width),
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height_(format.fmt.pix_mp.height),
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bytes_per_line_(format.fmt.pix_mp.width),
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merge_stream_flag_(mergeStreamFlag){}
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void StreamFormat::FillFormatRequest(v4l2_format* format) const {
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memset(format, 0, sizeof(*format));
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format->type = type_;
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format->fmt.pix_mp.pixelformat = v4l2_pixel_format_;
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format->fmt.pix_mp.width = width_;
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format->fmt.pix_mp.height = height_;
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// Bytes per line and min buffer size are outputs set by the driver,
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// not part of the request.
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}
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FormatCategory StreamFormat::Category() const {
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switch (v4l2_pixel_format_) {
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case V4L2_PIX_FMT_JPEG:
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return kFormatCategoryStalling;
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case V4L2_PIX_FMT_YUV420: // Fall through.
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case V4L2_PIX_FMT_BGR32:
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return kFormatCategoryNonStalling;
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default:
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// Note: currently no supported RAW formats.
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return kFormatCategoryUnknown;
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}
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}
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bool StreamFormat::operator==(const StreamFormat& other) const {
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// Used to check that a requested format was actually set, so
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// don't compare bytes per line or min buffer size.
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return (type_ == other.type_ &&
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v4l2_pixel_format_ == other.v4l2_pixel_format_ &&
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width_ == other.width_ && height_ == other.height_);
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}
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bool StreamFormat::operator!=(const StreamFormat& other) const {
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return !(*this == other);
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}
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int StreamFormat::V4L2ToHalPixelFormat(uint32_t v4l2_pixel_format) {
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HAL_LOGD("Get v4l2_pixel_format %s",
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getV4l2PixelFormatString(v4l2_pixel_format).c_str());
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// Translate V4L2 format to HAL format.
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int hal_pixel_format = -1;
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switch (v4l2_pixel_format) {
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case V4L2_PIX_FMT_JPEG:
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hal_pixel_format = HAL_PIXEL_FORMAT_BLOB;
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break;
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case V4L2_PIX_FMT_NV21:
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hal_pixel_format = HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED;
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HAL_LOGD("Set format as %s for GPU",
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getHalPixelFormatString(hal_pixel_format).c_str());
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break;
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case V4L2_PIX_FMT_NV12:
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hal_pixel_format = HAL_PIXEL_FORMAT_YCbCr_420_888;
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HAL_LOGD("Set format as %s",
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getHalPixelFormatString(hal_pixel_format).c_str());
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break;
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case V4L2_PIX_FMT_YUV420:
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hal_pixel_format = HAL_PIXEL_FORMAT_YCbCr_420_888;
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HAL_LOGD("Set format as %s",
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getHalPixelFormatString(hal_pixel_format).c_str());
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break;
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case V4L2_PIX_FMT_BGR32:
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hal_pixel_format = HAL_PIXEL_FORMAT_RGBA_8888;
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HAL_LOGD("Set format as %s",
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getHalPixelFormatString(hal_pixel_format).c_str());
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break;
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default:
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// Unrecognized format.
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if (getV4l2PixelFormatString(v4l2_pixel_format) != "") {
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HAL_LOGV("Unrecognized v4l2 pixel format %s",
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getV4l2PixelFormatString(v4l2_pixel_format).c_str());
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} else {
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HAL_LOGV("Unrecognized v4l2 pixel format %u", v4l2_pixel_format);
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}
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break;
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}
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return hal_pixel_format;
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}
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uint32_t StreamFormat::HalToV4L2PixelFormat(int hal_pixel_format) {
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// Translate HAL format to V4L2 format.
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uint32_t v4l2_pixel_format = 0;
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switch (hal_pixel_format) {
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case HAL_PIXEL_FORMAT_RGBA_8888:
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// Should be RGB32, but RPi doesn't support that.
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// For now we accept that the colors will be off.
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v4l2_pixel_format = V4L2_PIX_FMT_BGR32;
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break;
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// Set the default format between CSI and GPU-gralloc
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// with HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED.
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// In CSI we see the HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED
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// as V4L2_PIX_FMT_NV21.
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// In GPU they see the HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED
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// as HAL_PIXEL_FORMAT_YCrCb_420_SP.
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// PS: In CSI V4L2_PIX_FMT_YVU420 equals YV12.
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// In CSI V4L2_PIX_FMT_YUV420 equals YV21.
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// keep the HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED for MPLANE.
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case HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED: // fall-through.
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v4l2_pixel_format = V4L2_PIX_FMT_NV21;
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break;
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case HAL_PIXEL_FORMAT_YCrCb_420_SP:
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v4l2_pixel_format = V4L2_PIX_FMT_NV21;
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break;
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case HAL_PIXEL_FORMAT_YCbCr_420_888:
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v4l2_pixel_format = V4L2_PIX_FMT_NV21;
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break;
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case HAL_PIXEL_FORMAT_BLOB:
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v4l2_pixel_format = V4L2_PIX_FMT_JPEG;
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break;
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default:
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// Unrecognized format.
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HAL_LOGV("Unrecognized HAL pixel format %d", hal_pixel_format);
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break;
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}
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HAL_LOGD("HAL pixel format is %s. set v4l2_pixel_format to %s",
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getHalPixelFormatString(hal_pixel_format).c_str(),
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getV4l2PixelFormatString(v4l2_pixel_format).c_str());
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return v4l2_pixel_format;
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}
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bool StreamFormat::GetMergeStreamFlag() {
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return merge_stream_flag_;
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}
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} // namespace v4l2_camera_hal
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