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// Copyright 2013 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 "content/renderer/media/rtc_video_decoder_bridge_tv.h"
#include <queue>
#include "base/bind.h"
#include "base/callback_helpers.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/memory/ref_counted.h"
#include "base/memory/singleton.h"
#include "base/message_loop/message_loop_proxy.h"
#include "base/time/time.h"
#include "content/renderer/media/rtc_video_decoder_factory_tv.h"
#include "media/base/bind_to_current_loop.h"
#include "media/base/decoder_buffer.h"
#include "third_party/libjingle/source/talk/base/ratetracker.h"
namespace content {
RTCVideoDecoderBridgeTv::RTCVideoDecoderBridgeTv(
RTCVideoDecoderFactoryTv* factory)
: factory_(factory),
is_initialized_(false),
first_frame_(true) {}
RTCVideoDecoderBridgeTv::~RTCVideoDecoderBridgeTv() {}
int32_t RTCVideoDecoderBridgeTv::InitDecode(
const webrtc::VideoCodec* codec_settings,
int32_t number_of_cores) {
// We don't support non-VP8 codec, feedback mode, nor double-initialization
if (codec_settings->codecType != webrtc::kVideoCodecVP8 ||
codec_settings->codecSpecific.VP8.feedbackModeOn || is_initialized_)
return WEBRTC_VIDEO_CODEC_ERROR;
size_ = gfx::Size(codec_settings->width, codec_settings->height);
is_initialized_ = true;
first_frame_ = true;
factory_->InitializeStream(size_);
return WEBRTC_VIDEO_CODEC_OK;
}
int32_t RTCVideoDecoderBridgeTv::Decode(
const webrtc::EncodedImage& input_image,
bool missing_frames,
const webrtc::RTPFragmentationHeader* fragmentation,
const webrtc::CodecSpecificInfo* codec_specific_info,
int64_t render_time_ms) {
// Unlike the SW decoder in libvpx, hw decoder can not handle broken frames.
// Here, we return an error in order to request a key frame.
if (missing_frames || !input_image._completeFrame)
return WEBRTC_VIDEO_CODEC_ERROR;
if (!is_initialized_)
return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
if (first_frame_) {
// If the first frame is not a key frame, return an error to request a key
// frame.
if (input_image._frameType != webrtc::kKeyFrame)
return WEBRTC_VIDEO_CODEC_ERROR;
// Google TV expects timestamp from 0, so we store the initial timestamp as
// an offset and subtract the value from every timestamps to meet the
// expectation.
timestamp_offset_millis_ = render_time_ms;
}
first_frame_ = false;
gfx::Size new_size;
if (input_image._frameType == webrtc::kKeyFrame &&
input_image._encodedWidth != 0 && input_image._encodedHeight != 0) {
// Only a key frame has a meaningful size.
new_size.SetSize(input_image._encodedWidth, input_image._encodedHeight);
if (size_ == new_size)
new_size = gfx::Size();
else
size_ = new_size;
}
// |input_image_| may be destroyed after this call, so we make a copy of the
// buffer so that we can queue the buffer asynchronously.
scoped_refptr<media::DecoderBuffer> buffer =
media::DecoderBuffer::CopyFrom(input_image._buffer, input_image._length);
if (render_time_ms != -1) {
buffer->set_timestamp(base::TimeDelta::FromMilliseconds(
render_time_ms - timestamp_offset_millis_));
}
factory_->QueueBuffer(buffer, new_size);
return WEBRTC_VIDEO_CODEC_OK;
}
int32_t RTCVideoDecoderBridgeTv::RegisterDecodeCompleteCallback(
webrtc::DecodedImageCallback* callback) {
return WEBRTC_VIDEO_CODEC_OK;
}
int32_t RTCVideoDecoderBridgeTv::Release() {
is_initialized_ = false;
return WEBRTC_VIDEO_CODEC_OK;
}
int32_t RTCVideoDecoderBridgeTv::Reset() {
first_frame_ = true;
return WEBRTC_VIDEO_CODEC_OK;
}
} // namespace content
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