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// Copyright (c) 2011 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 "remoting/base/decoder_vp8.h"
#include "media/base/media.h"
#include "media/base/yuv_convert.h"
#include "remoting/base/util.h"
extern "C" {
#define VPX_CODEC_DISABLE_COMPAT 1
#include "third_party/libvpx/libvpx.h"
}
namespace remoting {
DecoderVp8::DecoderVp8()
: state_(kUninitialized),
codec_(NULL),
last_image_(NULL),
horizontal_scale_ratio_(1.0),
vertical_scale_ratio_(1.0) {
}
DecoderVp8::~DecoderVp8() {
if (codec_) {
vpx_codec_err_t ret = vpx_codec_destroy(codec_);
CHECK(ret == VPX_CODEC_OK) << "Failed to destroy codec";
}
delete codec_;
}
void DecoderVp8::Initialize(scoped_refptr<media::VideoFrame> frame) {
DCHECK_EQ(kUninitialized, state_);
if (frame->format() != media::VideoFrame::RGB32) {
LOG(INFO) << "DecoderVp8 only supports RGB32 as output";
state_ = kError;
return;
}
frame_ = frame;
state_ = kReady;
}
Decoder::DecodeResult DecoderVp8::DecodePacket(const VideoPacket* packet) {
DCHECK_EQ(kReady, state_);
// Initialize the codec as needed.
if (!codec_) {
codec_ = new vpx_codec_ctx_t();
// TODO(hclam): Scale the number of threads with number of cores of the
// machine.
vpx_codec_dec_cfg config;
config.w = 0;
config.h = 0;
config.threads = 2;
vpx_codec_err_t ret =
vpx_codec_dec_init(
codec_, vpx_codec_vp8_dx(), &config, 0);
if (ret != VPX_CODEC_OK) {
LOG(INFO) << "Cannot initialize codec.";
delete codec_;
codec_ = NULL;
state_ = kError;
return DECODE_ERROR;
}
}
// Do the actual decoding.
vpx_codec_err_t ret = vpx_codec_decode(
codec_, reinterpret_cast<const uint8*>(packet->data().data()),
packet->data().size(), NULL, 0);
if (ret != VPX_CODEC_OK) {
LOG(INFO) << "Decoding failed:" << vpx_codec_err_to_string(ret) << "\n"
<< "Details: " << vpx_codec_error(codec_) << "\n"
<< vpx_codec_error_detail(codec_);
return DECODE_ERROR;
}
// Gets the decoded data.
vpx_codec_iter_t iter = NULL;
vpx_image_t* image = vpx_codec_get_frame(codec_, &iter);
if (!image) {
LOG(INFO) << "No video frame decoded";
return DECODE_ERROR;
}
last_image_ = image;
std::vector<gfx::Rect> rects;
for (int i = 0; i < packet->dirty_rects_size(); ++i) {
gfx::Rect r = gfx::Rect(packet->dirty_rects(i).x(),
packet->dirty_rects(i).y(),
packet->dirty_rects(i).width(),
packet->dirty_rects(i).height());
rects.push_back(r);
}
if (!DoScaling())
ConvertRects(rects, &updated_rects_);
else
ScaleAndConvertRects(rects, &updated_rects_);
return DECODE_DONE;
}
void DecoderVp8::GetUpdatedRects(UpdatedRects* rects) {
rects->swap(updated_rects_);
}
void DecoderVp8::Reset() {
frame_ = NULL;
state_ = kUninitialized;
}
bool DecoderVp8::IsReadyForData() {
return state_ == kReady;
}
VideoPacketFormat::Encoding DecoderVp8::Encoding() {
return VideoPacketFormat::ENCODING_VP8;
}
void DecoderVp8::SetScaleRatios(double horizontal_ratio,
double vertical_ratio) {
// TODO(hclam): Ratio greater than 1.0 is not supported. This is
// because we need to reallocate the backing video frame and this
// is not implemented yet.
if (horizontal_ratio > 1.0 || horizontal_ratio <= 0.0 ||
vertical_ratio > 1.0 || vertical_ratio <= 0.0) {
return;
}
horizontal_scale_ratio_ = horizontal_ratio;
vertical_scale_ratio_ = vertical_ratio;
}
void DecoderVp8::SetClipRect(const gfx::Rect& clip_rect) {
clip_rect_ = clip_rect;
}
void DecoderVp8::RefreshRects(const std::vector<gfx::Rect>& rects) {
if (!DoScaling())
ConvertRects(rects, &updated_rects_);
else
ScaleAndConvertRects(rects, &updated_rects_);
}
bool DecoderVp8::DoScaling() const {
return horizontal_scale_ratio_ != 1.0 || vertical_scale_ratio_ != 1.0;
}
void DecoderVp8::ConvertRects(const UpdatedRects& rects,
UpdatedRects* output_rects) {
if (!last_image_)
return;
uint8* data_start = frame_->data(media::VideoFrame::kRGBPlane);
const int stride = frame_->stride(media::VideoFrame::kRGBPlane);
output_rects->clear();
for (size_t i = 0; i < rects.size(); ++i) {
// Round down the image width and height.
int image_width = RoundToTwosMultiple(last_image_->d_w);
int image_height = RoundToTwosMultiple(last_image_->d_h);
// Clip by the clipping rectangle first.
gfx::Rect dest_rect = rects[i].Intersect(clip_rect_);
// Then clip by the rounded down dimension of the image for safety.
dest_rect = dest_rect.Intersect(
gfx::Rect(0, 0, image_width, image_height));
// Align the rectangle to avoid artifacts in color space conversion.
dest_rect = AlignRect(dest_rect);
if (dest_rect.IsEmpty())
continue;
ConvertYUVToRGB32WithRect(last_image_->planes[0],
last_image_->planes[1],
last_image_->planes[2],
data_start,
dest_rect,
last_image_->stride[0],
last_image_->stride[1],
stride);
output_rects->push_back(dest_rect);
}
}
void DecoderVp8::ScaleAndConvertRects(const UpdatedRects& rects,
UpdatedRects* output_rects) {
if (!last_image_)
return;
uint8* data_start = frame_->data(media::VideoFrame::kRGBPlane);
const int stride = frame_->stride(media::VideoFrame::kRGBPlane);
output_rects->clear();
for (size_t i = 0; i < rects.size(); ++i) {
// Round down the image width and height.
int image_width = RoundToTwosMultiple(last_image_->d_w);
int image_height = RoundToTwosMultiple(last_image_->d_h);
// Clip by the rounded down dimension of the image for safety.
gfx::Rect dest_rect =
rects[i].Intersect(gfx::Rect(0, 0, image_width, image_height));
// Align the rectangle to avoid artifacts in color space conversion.
dest_rect = AlignRect(dest_rect);
if (dest_rect.IsEmpty())
continue;
gfx::Rect scaled_rect = ScaleRect(dest_rect,
horizontal_scale_ratio_,
vertical_scale_ratio_);
ScaleYUVToRGB32WithRect(last_image_->planes[0],
last_image_->planes[1],
last_image_->planes[2],
data_start,
dest_rect,
scaled_rect,
last_image_->stride[0],
last_image_->stride[1],
stride);
output_rects->push_back(scaled_rect);
}
}
} // namespace remoting
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