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// Copyright 2019 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// #define LOG_NDEBUG 0
#define LOG_TAG "VideoFrame"
#include <string.h>
#include "video_frame.h"
#include <log/log.h>
namespace android {
namespace {
void CopyWindow(const uint8_t* src, uint8_t* dst, size_t stride, size_t width, size_t height,
size_t inc) {
if (inc == 1 && stride == width) {
// Could copy by plane.
memcpy(dst, src, width * height);
return;
}
if (inc == 1) {
// Could copy by row.
for (size_t row = 0; row < height; ++row) {
memcpy(dst, src, width);
dst += width;
src += stride;
}
return;
}
// inc != 1, copy by pixel.
for (size_t row = 0; row < height; ++row) {
for (size_t col = 0; col < width; ++col) {
memcpy(dst, src, 1);
dst++;
src += inc;
}
src += (stride - width) * inc;
}
}
} // namespace
// static
std::unique_ptr<VideoFrame> VideoFrame::Create(const uint8_t* data, size_t data_size,
const Size& coded_size, const Size& visible_size,
int32_t color_format) {
if (coded_size.IsEmpty() || visible_size.IsEmpty() || (visible_size.width > coded_size.width) ||
(visible_size.height > coded_size.height) || (coded_size.width % 2 != 0) ||
(coded_size.height % 2 != 0) || (visible_size.width % 2 != 0) ||
(visible_size.height % 2 != 0)) {
ALOGE("Size are not valid: coded: %dx%d, visible: %dx%d", coded_size.width,
coded_size.height, visible_size.width, visible_size.height);
return nullptr;
}
if (color_format != YUV_420_PLANAR && color_format != YUV_420_FLEXIBLE &&
color_format != HAL_PIXEL_FORMAT_YV12 && color_format != HAL_PIXEL_FORMAT_NV12) {
ALOGE("color_format is unknown: 0x%x", color_format);
return nullptr;
}
if (data_size < coded_size.width * coded_size.height * 3 / 2) {
ALOGE("data_size(=%zu) is not enough for coded_size(=%dx%d)", data_size, coded_size.width,
coded_size.height);
return nullptr;
}
// We've found in ARC++P H264 decoding, |data_size| of some output buffers are
// bigger than the area which |coded_size| needs (not observed on other codec
// and ARC++N).
// TODO(johnylin): find the root cause (b/130398258)
if (data_size > coded_size.width * coded_size.height * 3 / 2) {
ALOGV("data_size(=%zu) is bigger than the area coded_size(=%dx%d) needs.", data_size,
coded_size.width, coded_size.height);
}
return std::unique_ptr<VideoFrame>(
new VideoFrame(data, coded_size, visible_size, color_format));
}
VideoFrame::VideoFrame(const uint8_t* data, const Size& coded_size, const Size& visible_size,
int32_t color_format)
: data_(data),
coded_size_(coded_size),
visible_size_(visible_size),
color_format_(color_format) {
frame_data_[0] =
std::unique_ptr<uint8_t[]>(new uint8_t[visible_size_.width * visible_size_.height]());
frame_data_[1] = std::unique_ptr<uint8_t[]>(
new uint8_t[visible_size_.width * visible_size_.height / 4]());
frame_data_[2] = std::unique_ptr<uint8_t[]>(
new uint8_t[visible_size_.width * visible_size_.height / 4]());
if (IsFlexibleFormat()) {
ALOGV("Cannot convert video frame now, should be done later by matching HAL "
"format.");
return;
}
CopyAndConvertToI420Frame(color_format_);
}
bool VideoFrame::IsFlexibleFormat() const {
return color_format_ == YUV_420_FLEXIBLE;
}
void VideoFrame::CopyAndConvertToI420Frame(int32_t curr_format) {
size_t stride = coded_size_.width;
size_t slice_height = coded_size_.height;
size_t width = visible_size_.width;
size_t height = visible_size_.height;
const uint8_t* src = data_;
CopyWindow(src, frame_data_[0].get(), stride, width, height, 1); // copy Y
src += stride * slice_height;
switch (curr_format) {
case YUV_420_PLANAR:
CopyWindow(src, frame_data_[1].get(), stride / 2, width / 2, height / 2,
1); // copy U
src += stride * slice_height / 4;
CopyWindow(src, frame_data_[2].get(), stride / 2, width / 2, height / 2,
1); // copy V
return;
case HAL_PIXEL_FORMAT_NV12:
// NV12: semiplanar = true, crcb_swap = false.
CopyWindow(src, frame_data_[1].get(), stride / 2, width / 2, height / 2,
2); // copy U
src++;
CopyWindow(src, frame_data_[2].get(), stride / 2, width / 2, height / 2,
2); // copy V
return;
case HAL_PIXEL_FORMAT_YV12:
// YV12: semiplanar = false, crcb_swap = true.
CopyWindow(src, frame_data_[2].get(), stride / 2, width / 2, height / 2,
1); // copy V
src += stride * slice_height / 4;
CopyWindow(src, frame_data_[1].get(), stride / 2, width / 2, height / 2,
1); // copy U
return;
default:
ALOGE("Unknown format: 0x%x", curr_format);
return;
}
}
bool VideoFrame::MatchHalFormatByGoldenMD5(const std::string& golden) {
if (!IsFlexibleFormat()) return true;
// Try to match with HAL_PIXEL_FORMAT_NV12 first.
int32_t format_candidates[2] = {HAL_PIXEL_FORMAT_NV12, HAL_PIXEL_FORMAT_YV12};
for (int32_t format : format_candidates) {
CopyAndConvertToI420Frame(format);
color_format_ = format;
std::string frame_md5 = ComputeMD5FromFrame();
if (!strcmp(frame_md5.c_str(), golden.c_str())) {
ALOGV("Matched YUV Flexible to HAL pixel format: 0x%x", format);
return true;
} else {
ALOGV("Tried HAL pixel format: 0x%x un-matched (%s vs %s)", format, frame_md5.c_str(),
golden.c_str());
}
}
// Change back to flexible format.
color_format_ = YUV_420_FLEXIBLE;
return false;
}
std::string VideoFrame::ComputeMD5FromFrame() const {
if (IsFlexibleFormat()) {
ALOGE("Cannot compute MD5 with format YUV_420_FLEXIBLE");
return std::string();
}
MD5Context context;
MD5Init(&context);
MD5Update(&context, std::string(reinterpret_cast<const char*>(frame_data_[0].get()),
visible_size_.width * visible_size_.height));
MD5Update(&context, std::string(reinterpret_cast<const char*>(frame_data_[1].get()),
visible_size_.width * visible_size_.height / 4));
MD5Update(&context, std::string(reinterpret_cast<const char*>(frame_data_[2].get()),
visible_size_.width * visible_size_.height / 4));
MD5Digest digest;
MD5Final(&digest, &context);
return MD5DigestToBase16(digest);
}
bool VideoFrame::VerifyMD5(const std::string& golden) {
if (IsFlexibleFormat()) {
// Color format is YUV_420_FLEXIBLE and we haven't match its HAL pixel
// format yet. Try to match now.
if (!MatchHalFormatByGoldenMD5(golden)) {
ALOGE("Failed to match any HAL format");
return false;
}
} else {
std::string md5 = ComputeMD5FromFrame();
if (strcmp(md5.c_str(), golden.c_str())) {
ALOGE("MD5 mismatched. expect: %s, got: %s", golden.c_str(), md5.c_str());
return false;
}
}
return true;
}
bool VideoFrame::WriteFrame(std::ofstream* output_file) const {
if (IsFlexibleFormat()) {
ALOGE("Cannot write frame with format YUV_420_FLEXIBLE");
return false;
}
output_file->write(reinterpret_cast<const char*>(frame_data_[0].get()),
visible_size_.width * visible_size_.height);
output_file->write(reinterpret_cast<const char*>(frame_data_[1].get()),
visible_size_.width * visible_size_.height / 4);
output_file->write(reinterpret_cast<const char*>(frame_data_[2].get()),
visible_size_.width * visible_size_.height / 4);
return output_file->good();
}
} // namespace android
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