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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 <math.h>
#include "base/logging.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),
clip_rect_(SkIRect::MakeEmpty()),
output_size_(SkISize::Make(0, 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;
RectVector rects;
rects.reserve(packet->dirty_rects_size());
for (int i = 0; i < packet->dirty_rects_size(); ++i) {
Rect remoting_rect = packet->dirty_rects(i);
rects.push_back(SkIRect::MakeXYWH(remoting_rect.x(),
remoting_rect.y(),
remoting_rect.width(),
remoting_rect.height()));
}
// TODO(wez): Fix the rest of the decode pipeline not to assume the frame
// size is the host dimensions, since it's not when scaling. If the host
// gets smaller, then the output size will be too big and we'll overrun the
// frame, so currently we render 1:1 in that case; the app will see the
// host size change and resize us if need be.
if ((output_size_.width() > static_cast<int>(frame_->width())) ||
(output_size_.height() > static_cast<int>(frame_->height()))) {
output_size_.set(frame_->width(), frame_->height());
}
RefreshRects(rects);
return DECODE_DONE;
}
void DecoderVp8::GetUpdatedRects(RectVector* 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::SetOutputSize(const SkISize& size) {
output_size_ = size;
}
void DecoderVp8::SetClipRect(const SkIRect& clip_rect) {
clip_rect_ = clip_rect;
}
void DecoderVp8::RefreshRects(const RectVector& rects) {
if (!DoScaling())
ConvertRects(rects, &updated_rects_);
else
ScaleAndConvertRects(rects, &updated_rects_);
}
bool DecoderVp8::DoScaling() const {
DCHECK(last_image_);
return !output_size_.equals(last_image_->d_w, last_image_->d_h);
}
void DecoderVp8::ConvertRects(const RectVector& input_rects,
RectVector* output_rects) {
if (!last_image_)
return;
// The conversion routine we use is optimized for even widths & heights.
int image_width = RoundToTwosMultiple(last_image_->d_w);
int image_height = RoundToTwosMultiple(last_image_->d_h);
uint8* output_rgb_buf = frame_->data(media::VideoFrame::kRGBPlane);
const int output_stride = frame_->stride(media::VideoFrame::kRGBPlane);
output_rects->clear();
// Clip based on both the output dimensions and Pepper clip rect.
SkIRect clip_rect = clip_rect_;
if (!clip_rect.intersect(SkIRect::MakeWH(image_width, image_height)))
return;
output_rects->reserve(input_rects.size());
for (size_t i = 0; i < input_rects.size(); ++i) {
// Align the rectangle to avoid artifacts in color space conversion.
SkIRect dest_rect = AlignRect(input_rects[i]);
// Clip to the image and Pepper clip region.
if (!dest_rect.intersect(clip_rect))
continue;
ConvertYUVToRGB32WithRect(last_image_->planes[0],
last_image_->planes[1],
last_image_->planes[2],
output_rgb_buf,
dest_rect,
last_image_->stride[0],
last_image_->stride[1],
output_stride);
output_rects->push_back(dest_rect);
}
}
void DecoderVp8::ScaleAndConvertRects(const RectVector& input_rects,
RectVector* output_rects) {
if (!last_image_)
return;
DCHECK(output_size_.width() <= static_cast<int>(frame_->width()));
DCHECK(output_size_.height() <= static_cast<int>(frame_->height()));
output_rects->clear();
// Clip based on both the output dimensions and Pepper clip rect.
SkIRect clip_rect = clip_rect_;
if (!clip_rect.intersect(SkIRect::MakeSize(output_size_)))
return;
SkISize image_size = SkISize::Make(last_image_->d_w, last_image_->d_h);
uint8* output_rgb_buf = frame_->data(media::VideoFrame::kRGBPlane);
const int output_stride = frame_->stride(media::VideoFrame::kRGBPlane);
output_rects->reserve(input_rects.size());
for (size_t i = 0; i < input_rects.size(); ++i) {
// Determine the scaled area affected by this rectangle changing.
SkIRect output_rect = ScaleRect(input_rects[i], image_size, output_size_);
if (!output_rect.intersect(clip_rect))
continue;
// The scaler will not read outside the input dimensions.
ScaleYUVToRGB32WithRect(last_image_->planes[0],
last_image_->planes[1],
last_image_->planes[2],
output_rgb_buf,
input_rects[i],
output_rect,
last_image_->stride[0],
last_image_->stride[1],
output_stride);
output_rects->push_back(output_rect);
}
}
} // namespace remoting
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