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125 lines
4.8 KiB
125 lines
4.8 KiB
// Copyright 2020 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//#define LOG_NDEBUG 0
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#define LOG_TAG "EncodeHelpers"
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#include <v4l2_codec2/common/EncodeHelpers.h>
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#include <linux/v4l2-controls.h>
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#include <C2AllocatorGralloc.h>
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#include <cutils/native_handle.h>
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#include <ui/GraphicBuffer.h>
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#include <utils/Log.h>
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#include <v4l2_codec2/common/NalParser.h>
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namespace android {
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uint8_t c2LevelToV4L2Level(C2Config::level_t level) {
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switch (level) {
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case C2Config::LEVEL_AVC_1:
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return V4L2_MPEG_VIDEO_H264_LEVEL_1_0;
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case C2Config::LEVEL_AVC_1B:
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return V4L2_MPEG_VIDEO_H264_LEVEL_1B;
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case C2Config::LEVEL_AVC_1_1:
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return V4L2_MPEG_VIDEO_H264_LEVEL_1_1;
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case C2Config::LEVEL_AVC_1_2:
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return V4L2_MPEG_VIDEO_H264_LEVEL_1_2;
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case C2Config::LEVEL_AVC_1_3:
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return V4L2_MPEG_VIDEO_H264_LEVEL_1_3;
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case C2Config::LEVEL_AVC_2:
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return V4L2_MPEG_VIDEO_H264_LEVEL_2_0;
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case C2Config::LEVEL_AVC_2_1:
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return V4L2_MPEG_VIDEO_H264_LEVEL_2_1;
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case C2Config::LEVEL_AVC_2_2:
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return V4L2_MPEG_VIDEO_H264_LEVEL_2_2;
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case C2Config::LEVEL_AVC_3:
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return V4L2_MPEG_VIDEO_H264_LEVEL_3_0;
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case C2Config::LEVEL_AVC_3_1:
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return V4L2_MPEG_VIDEO_H264_LEVEL_3_1;
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case C2Config::LEVEL_AVC_3_2:
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return V4L2_MPEG_VIDEO_H264_LEVEL_3_2;
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case C2Config::LEVEL_AVC_4:
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return V4L2_MPEG_VIDEO_H264_LEVEL_4_0;
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case C2Config::LEVEL_AVC_4_1:
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return V4L2_MPEG_VIDEO_H264_LEVEL_4_1;
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case C2Config::LEVEL_AVC_4_2:
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return V4L2_MPEG_VIDEO_H264_LEVEL_4_2;
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case C2Config::LEVEL_AVC_5:
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return V4L2_MPEG_VIDEO_H264_LEVEL_5_0;
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case C2Config::LEVEL_AVC_5_1:
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return V4L2_MPEG_VIDEO_H264_LEVEL_5_1;
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default:
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ALOGE("Unrecognizable C2 level (value = 0x%x)...", level);
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return 0;
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}
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}
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android_ycbcr getGraphicBlockInfo(const C2ConstGraphicBlock& block) {
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uint32_t width, height, format, stride, igbp_slot, generation;
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uint64_t usage, igbp_id;
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android::_UnwrapNativeCodec2GrallocMetadata(block.handle(), &width, &height, &format, &usage,
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&stride, &generation, &igbp_id, &igbp_slot);
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native_handle_t* grallocHandle = android::UnwrapNativeCodec2GrallocHandle(block.handle());
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sp<GraphicBuffer> buf = new GraphicBuffer(grallocHandle, GraphicBuffer::CLONE_HANDLE, width,
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height, format, 1, usage, stride);
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native_handle_delete(grallocHandle);
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// Pass SW flag so that ARCVM returns the guest buffer dimensions instead
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// of the host buffer dimensions. This means we will have to convert the
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// return value from ptrs to buffer offsets ourselves.
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android_ycbcr ycbcr = {};
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int32_t status = buf->lockYCbCr(GRALLOC_USAGE_SW_READ_OFTEN, &ycbcr);
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if (status != OK) ALOGE("lockYCbCr is failed: %d", (int)status);
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buf->unlock();
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uintptr_t y = reinterpret_cast<uintptr_t>(ycbcr.y);
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ycbcr.y = nullptr;
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ycbcr.cb = reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(ycbcr.cb) - y);
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ycbcr.cr = reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(ycbcr.cr) - y);
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return ycbcr;
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}
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void extractCSDInfo(std::unique_ptr<C2StreamInitDataInfo::output>* const csd, const uint8_t* data,
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size_t length) {
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// Android frameworks needs 4 bytes start code.
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constexpr uint8_t kStartCode[] = {0x00, 0x00, 0x00, 0x01};
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constexpr int kStartCodeLength = 4;
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csd->reset();
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// Temporarily allocate a byte array to copy codec config data. This should be freed after
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// codec config data extraction is done.
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auto tmpConfigData = std::make_unique<uint8_t[]>(length);
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uint8_t* tmpOutput = tmpConfigData.get();
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uint8_t* tmpConfigDataEnd = tmpOutput + length;
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NalParser parser(data, length);
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while (parser.locateNextNal()) {
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if (parser.length() == 0) continue;
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uint8_t nalType = parser.type();
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ALOGV("find next NAL: type=%d, length=%zu", nalType, parser.length());
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if (nalType != NalParser::kSPSType && nalType != NalParser::kPPSType) continue;
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if (tmpOutput + kStartCodeLength + parser.length() > tmpConfigDataEnd) {
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ALOGE("Buffer overflow on extracting codec config data (length=%zu)", length);
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return;
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}
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std::memcpy(tmpOutput, kStartCode, kStartCodeLength);
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tmpOutput += kStartCodeLength;
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std::memcpy(tmpOutput, parser.data(), parser.length());
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tmpOutput += parser.length();
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}
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size_t configDataLength = tmpOutput - tmpConfigData.get();
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ALOGV("Extracted codec config data: length=%zu", configDataLength);
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*csd = C2StreamInitDataInfo::output::AllocUnique(configDataLength, 0u);
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std::memcpy((*csd)->m.value, tmpConfigData.get(), configDataLength);
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}
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} // namespace android
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