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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 "media/filters/fake_video_decoder.h"
#include "base/bind.h"
#include "base/callback_helpers.h"
#include "base/location.h"
#include "base/message_loop/message_loop_proxy.h"
#include "media/base/bind_to_current_loop.h"
#include "media/base/test_helpers.h"
namespace media {
FakeVideoDecoder::FakeVideoDecoder(int decoding_delay,
bool supports_get_decode_output)
: task_runner_(base::MessageLoopProxy::current()),
weak_factory_(this),
decoding_delay_(decoding_delay),
supports_get_decode_output_(supports_get_decode_output),
state_(UNINITIALIZED),
total_bytes_decoded_(0) {
DCHECK_GE(decoding_delay, 0);
}
FakeVideoDecoder::~FakeVideoDecoder() {
DCHECK_EQ(state_, UNINITIALIZED);
}
void FakeVideoDecoder::Initialize(const VideoDecoderConfig& config,
const PipelineStatusCB& status_cb) {
DCHECK(task_runner_->BelongsToCurrentThread());
DCHECK(config.IsValidConfig());
DCHECK(decode_cb_.IsNull()) << "No reinitialization during pending decode.";
DCHECK(reset_cb_.IsNull()) << "No reinitialization during pending reset.";
weak_this_ = weak_factory_.GetWeakPtr();
current_config_ = config;
init_cb_.SetCallback(BindToCurrentLoop(status_cb));
if (!decoded_frames_.empty()) {
DVLOG(1) << "Decoded frames dropped during reinitialization.";
decoded_frames_.clear();
}
state_ = NORMAL;
init_cb_.RunOrHold(PIPELINE_OK);
}
void FakeVideoDecoder::Decode(const scoped_refptr<DecoderBuffer>& buffer,
const DecodeCB& decode_cb) {
DCHECK(task_runner_->BelongsToCurrentThread());
DCHECK(decode_cb_.IsNull()) << "Overlapping decodes are not supported.";
DCHECK(reset_cb_.IsNull());
DCHECK_LE(decoded_frames_.size(), static_cast<size_t>(decoding_delay_));
int buffer_size = buffer->end_of_stream() ? 0 : buffer->data_size();
decode_cb_.SetCallback(BindToCurrentLoop(base::Bind(
&FakeVideoDecoder::OnFrameDecoded, weak_this_, buffer_size, decode_cb)));
if (buffer->end_of_stream() && decoded_frames_.empty()) {
decode_cb_.RunOrHold(kOk, VideoFrame::CreateEOSFrame());
return;
}
if (!buffer->end_of_stream()) {
DCHECK(VerifyFakeVideoBufferForTest(buffer, current_config_));
scoped_refptr<VideoFrame> video_frame = VideoFrame::CreateColorFrame(
current_config_.coded_size(), 0, 0, 0, buffer->timestamp());
decoded_frames_.push_back(video_frame);
if (decoded_frames_.size() <= static_cast<size_t>(decoding_delay_)) {
decode_cb_.RunOrHold(kNotEnoughData, scoped_refptr<VideoFrame>());
return;
}
}
scoped_refptr<VideoFrame> frame = decoded_frames_.front();
decoded_frames_.pop_front();
decode_cb_.RunOrHold(kOk, frame);
}
void FakeVideoDecoder::Reset(const base::Closure& closure) {
DCHECK(task_runner_->BelongsToCurrentThread());
DCHECK(reset_cb_.IsNull());
reset_cb_.SetCallback(BindToCurrentLoop(closure));
// Defer the reset if a decode is pending.
if (!decode_cb_.IsNull())
return;
DoReset();
}
void FakeVideoDecoder::Stop(const base::Closure& closure) {
DCHECK(task_runner_->BelongsToCurrentThread());
stop_cb_.SetCallback(BindToCurrentLoop(closure));
// Defer the stop if an init, a decode or a reset is pending.
if (!init_cb_.IsNull() || !decode_cb_.IsNull() || !reset_cb_.IsNull())
return;
DoStop();
}
scoped_refptr<VideoFrame> FakeVideoDecoder::GetDecodeOutput() {
DCHECK(task_runner_->BelongsToCurrentThread());
if (!supports_get_decode_output_ || decoded_frames_.empty())
return NULL;
scoped_refptr<VideoFrame> out = decoded_frames_.front();
decoded_frames_.pop_front();
return out;
}
void FakeVideoDecoder::HoldNextInit() {
DCHECK(task_runner_->BelongsToCurrentThread());
init_cb_.HoldCallback();
}
void FakeVideoDecoder::HoldNextRead() {
DCHECK(task_runner_->BelongsToCurrentThread());
decode_cb_.HoldCallback();
}
void FakeVideoDecoder::HoldNextReset() {
DCHECK(task_runner_->BelongsToCurrentThread());
reset_cb_.HoldCallback();
}
void FakeVideoDecoder::HoldNextStop() {
DCHECK(task_runner_->BelongsToCurrentThread());
stop_cb_.HoldCallback();
}
void FakeVideoDecoder::SatisfyInit() {
DCHECK(task_runner_->BelongsToCurrentThread());
DCHECK(decode_cb_.IsNull());
DCHECK(reset_cb_.IsNull());
init_cb_.RunHeldCallback();
if (!stop_cb_.IsNull())
DoStop();
}
void FakeVideoDecoder::SatisfyRead() {
DCHECK(task_runner_->BelongsToCurrentThread());
decode_cb_.RunHeldCallback();
if (!reset_cb_.IsNull())
DoReset();
if (reset_cb_.IsNull() && !stop_cb_.IsNull())
DoStop();
}
void FakeVideoDecoder::SatisfyReset() {
DCHECK(task_runner_->BelongsToCurrentThread());
DCHECK(decode_cb_.IsNull());
reset_cb_.RunHeldCallback();
if (!stop_cb_.IsNull())
DoStop();
}
void FakeVideoDecoder::SatisfyStop() {
DCHECK(task_runner_->BelongsToCurrentThread());
DCHECK(decode_cb_.IsNull());
DCHECK(reset_cb_.IsNull());
stop_cb_.RunHeldCallback();
}
void FakeVideoDecoder::DoReset() {
DCHECK(task_runner_->BelongsToCurrentThread());
DCHECK(decode_cb_.IsNull());
DCHECK(!reset_cb_.IsNull());
decoded_frames_.clear();
reset_cb_.RunOrHold();
}
void FakeVideoDecoder::DoStop() {
DCHECK(task_runner_->BelongsToCurrentThread());
DCHECK(decode_cb_.IsNull());
DCHECK(reset_cb_.IsNull());
DCHECK(!stop_cb_.IsNull());
state_ = UNINITIALIZED;
decoded_frames_.clear();
stop_cb_.RunOrHold();
}
void FakeVideoDecoder::OnFrameDecoded(
int buffer_size,
const DecodeCB& decode_cb,
Status status,
const scoped_refptr<VideoFrame>& video_frame) {
if (status == kOk || status == kNotEnoughData)
total_bytes_decoded_ += buffer_size;
decode_cb.Run(status, video_frame);
}
} // namespace media
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