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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "webrtc/modules/video_coding/codecs/i420/include/i420.h"
#include <limits>
#include <string>
#include "webrtc/common_video/libyuv/include/webrtc_libyuv.h"
namespace {
const size_t kI420HeaderSize = 4;
}
namespace webrtc {
I420Encoder::I420Encoder()
: _inited(false), _encodedImage(), _encodedCompleteCallback(NULL) {}
I420Encoder::~I420Encoder() {
_inited = false;
delete[] _encodedImage._buffer;
}
int I420Encoder::Release() {
// Should allocate an encoded frame and then release it here, for that we
// actually need an init flag.
if (_encodedImage._buffer != NULL) {
delete[] _encodedImage._buffer;
_encodedImage._buffer = NULL;
}
_inited = false;
return WEBRTC_VIDEO_CODEC_OK;
}
int I420Encoder::InitEncode(const VideoCodec* codecSettings,
int /*numberOfCores*/,
size_t /*maxPayloadSize */) {
if (codecSettings == NULL) {
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
}
if (codecSettings->width < 1 || codecSettings->height < 1) {
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
}
// Allocating encoded memory.
if (_encodedImage._buffer != NULL) {
delete[] _encodedImage._buffer;
_encodedImage._buffer = NULL;
_encodedImage._size = 0;
}
const size_t newSize =
CalcBufferSize(kI420, codecSettings->width, codecSettings->height) +
kI420HeaderSize;
uint8_t* newBuffer = new uint8_t[newSize];
if (newBuffer == NULL) {
return WEBRTC_VIDEO_CODEC_MEMORY;
}
_encodedImage._size = newSize;
_encodedImage._buffer = newBuffer;
// If no memory allocation, no point to init.
_inited = true;
return WEBRTC_VIDEO_CODEC_OK;
}
int I420Encoder::Encode(const VideoFrame& inputImage,
const CodecSpecificInfo* /*codecSpecificInfo*/,
const std::vector<FrameType>* /*frame_types*/) {
if (!_inited) {
return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
}
if (_encodedCompleteCallback == NULL) {
return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
}
_encodedImage._frameType = kVideoFrameKey;
_encodedImage._timeStamp = inputImage.timestamp();
_encodedImage._encodedHeight = inputImage.height();
_encodedImage._encodedWidth = inputImage.width();
int width = inputImage.width();
if (width > std::numeric_limits<uint16_t>::max()) {
return WEBRTC_VIDEO_CODEC_ERR_SIZE;
}
int height = inputImage.height();
if (height > std::numeric_limits<uint16_t>::max()) {
return WEBRTC_VIDEO_CODEC_ERR_SIZE;
}
size_t req_length =
CalcBufferSize(kI420, inputImage.width(), inputImage.height()) +
kI420HeaderSize;
if (_encodedImage._size > req_length) {
// Reallocate buffer.
delete[] _encodedImage._buffer;
_encodedImage._buffer = new uint8_t[req_length];
_encodedImage._size = req_length;
}
uint8_t* buffer = _encodedImage._buffer;
buffer = InsertHeader(buffer, width, height);
int ret_length =
ExtractBuffer(inputImage, req_length - kI420HeaderSize, buffer);
if (ret_length < 0)
return WEBRTC_VIDEO_CODEC_MEMORY;
_encodedImage._length = ret_length + kI420HeaderSize;
_encodedCompleteCallback->Encoded(_encodedImage, NULL, NULL);
return WEBRTC_VIDEO_CODEC_OK;
}
uint8_t* I420Encoder::InsertHeader(uint8_t* buffer,
uint16_t width,
uint16_t height) {
*buffer++ = static_cast<uint8_t>(width >> 8);
*buffer++ = static_cast<uint8_t>(width & 0xFF);
*buffer++ = static_cast<uint8_t>(height >> 8);
*buffer++ = static_cast<uint8_t>(height & 0xFF);
return buffer;
}
int I420Encoder::RegisterEncodeCompleteCallback(
EncodedImageCallback* callback) {
_encodedCompleteCallback = callback;
return WEBRTC_VIDEO_CODEC_OK;
}
I420Decoder::I420Decoder()
: _decodedImage(),
_width(0),
_height(0),
_inited(false),
_decodeCompleteCallback(NULL) {}
I420Decoder::~I420Decoder() {
Release();
}
int I420Decoder::Reset() {
return WEBRTC_VIDEO_CODEC_OK;
}
int I420Decoder::InitDecode(const VideoCodec* codecSettings,
int /*numberOfCores */) {
if (codecSettings == NULL) {
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
} else if (codecSettings->width < 1 || codecSettings->height < 1) {
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
}
_width = codecSettings->width;
_height = codecSettings->height;
_inited = true;
return WEBRTC_VIDEO_CODEC_OK;
}
int I420Decoder::Decode(const EncodedImage& inputImage,
bool /*missingFrames*/,
const RTPFragmentationHeader* /*fragmentation*/,
const CodecSpecificInfo* /*codecSpecificInfo*/,
int64_t /*renderTimeMs*/) {
if (inputImage._buffer == NULL) {
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
}
if (_decodeCompleteCallback == NULL) {
return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
}
if (inputImage._length <= 0) {
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
}
if (inputImage._completeFrame == false) {
return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;
}
if (!_inited) {
return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
}
if (inputImage._length < kI420HeaderSize) {
return WEBRTC_VIDEO_CODEC_ERROR;
}
const uint8_t* buffer = inputImage._buffer;
uint16_t width, height;
buffer = ExtractHeader(buffer, &width, &height);
_width = width;
_height = height;
// Verify that the available length is sufficient:
size_t req_length = CalcBufferSize(kI420, _width, _height) + kI420HeaderSize;
if (req_length > inputImage._length) {
return WEBRTC_VIDEO_CODEC_ERROR;
}
// Set decoded image parameters.
int half_width = (_width + 1) / 2;
_decodedImage.CreateEmptyFrame(_width, _height, _width, half_width,
half_width);
// Converting from buffer to plane representation.
int ret = ConvertToI420(kI420, buffer, 0, 0, _width, _height, 0,
kVideoRotation_0, &_decodedImage);
if (ret < 0) {
return WEBRTC_VIDEO_CODEC_MEMORY;
}
_decodedImage.set_timestamp(inputImage._timeStamp);
_decodeCompleteCallback->Decoded(_decodedImage);
return WEBRTC_VIDEO_CODEC_OK;
}
const uint8_t* I420Decoder::ExtractHeader(const uint8_t* buffer,
uint16_t* width,
uint16_t* height) {
*width = static_cast<uint16_t>(*buffer++) << 8;
*width |= *buffer++;
*height = static_cast<uint16_t>(*buffer++) << 8;
*height |= *buffer++;
return buffer;
}
int I420Decoder::RegisterDecodeCompleteCallback(
DecodedImageCallback* callback) {
_decodeCompleteCallback = callback;
return WEBRTC_VIDEO_CODEC_OK;
}
int I420Decoder::Release() {
_inited = false;
return WEBRTC_VIDEO_CODEC_OK;
}
} // namespace webrtc
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