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// Copyright (c) 2010 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/include/vpx/vpx_codec.h"
#include "third_party/libvpx/include/vpx/vpx_decoder.h"
#include "third_party/libvpx/include/vpx/vp8dx.h"
}
namespace remoting {
DecoderVp8::DecoderVp8()
: state_(kWaitingForBeginRect),
rect_x_(0),
rect_y_(0),
rect_width_(0),
rect_height_(0),
updated_rects_(NULL),
codec_(NULL) {
}
DecoderVp8::~DecoderVp8() {
if (codec_) {
vpx_codec_err_t ret = vpx_codec_destroy(codec_);
CHECK(ret == VPX_CODEC_OK) << "Failed to destroy codec";
}
delete codec_;
}
bool DecoderVp8::BeginDecode(scoped_refptr<media::VideoFrame> frame,
UpdatedRects* updated_rects,
Task* partial_decode_done,
Task* decode_done) {
DCHECK(!partial_decode_done_.get());
DCHECK(!decode_done_.get());
DCHECK(!updated_rects_);
DCHECK_EQ(kWaitingForBeginRect, state_);
partial_decode_done_.reset(partial_decode_done);
decode_done_.reset(decode_done);
updated_rects_ = updated_rects;
if (frame->format() != media::VideoFrame::RGB32) {
LOG(INFO) << "DecoderVp8 only supports RGB32 as output";
return false;
}
frame_ = frame;
return true;
}
bool DecoderVp8::PartialDecode(ChromotingHostMessage* message) {
scoped_ptr<ChromotingHostMessage> msg_deleter(message);
DCHECK(message->has_update_stream_packet());
bool ret = true;
if (message->update_stream_packet().has_begin_rect())
ret = HandleBeginRect(message);
if (ret && message->update_stream_packet().has_rect_data())
ret = HandleRectData(message);
if (ret && message->update_stream_packet().has_end_rect())
ret = HandleEndRect(message);
return ret;
}
void DecoderVp8::EndDecode() {
DCHECK_EQ(kWaitingForBeginRect, state_);
decode_done_->Run();
partial_decode_done_.reset();
decode_done_.reset();
frame_ = NULL;
updated_rects_ = NULL;
}
bool DecoderVp8::HandleBeginRect(ChromotingHostMessage* message) {
DCHECK_EQ(kWaitingForBeginRect, state_);
state_ = kWaitingForRectData;
rect_width_ = message->update_stream_packet().begin_rect().width();
rect_height_ = message->update_stream_packet().begin_rect().height();
rect_x_ = message->update_stream_packet().begin_rect().x();
rect_y_ = message->update_stream_packet().begin_rect().y();
PixelFormat pixel_format =
message->update_stream_packet().begin_rect().pixel_format();
if (pixel_format != PixelFormatYv12)
return false;
return true;
}
bool DecoderVp8::HandleRectData(ChromotingHostMessage* message) {
DCHECK_EQ(kWaitingForRectData, state_);
DCHECK_EQ(0,
message->update_stream_packet().rect_data().sequence_number());
// Initialize the codec as needed.
if (!codec_) {
codec_ = new vpx_codec_ctx_t();
vpx_codec_err_t ret =
vpx_codec_dec_init(
codec_,
(const vpx_codec_iface_t*)media::GetVp8DxAlgoAddress(), NULL, 0);
if (ret != VPX_CODEC_OK) {
LOG(INFO) << "Cannot initialize codec.";
delete codec_;
codec_ = NULL;
return false;
}
}
// Do the actual decoding.
vpx_codec_err_t ret = vpx_codec_decode(
codec_,
(uint8_t*)message->update_stream_packet().rect_data().data().c_str(),
message->update_stream_packet().rect_data().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 false;
}
// 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 false;
}
// Perform YUV conversion.
media::ConvertYUVToRGB32(image->planes[0], image->planes[1], image->planes[2],
frame_->data(media::VideoFrame::kRGBPlane),
rect_width_, rect_height_,
image->stride[0], image->stride[1],
frame_->stride(media::VideoFrame::kRGBPlane),
media::YV12);
updated_rects_->clear();
updated_rects_->push_back(gfx::Rect(rect_x_, rect_y_,
rect_width_, rect_height_));
partial_decode_done_->Run();
return true;
}
bool DecoderVp8::HandleEndRect(ChromotingHostMessage* message) {
DCHECK_EQ(kWaitingForRectData, state_);
state_ = kWaitingForBeginRect;
return true;
}
} // namespace remoting
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