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// Copyright (c) 2012 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.
//
// demuxer_bench is a standalone benchmarking tool for FFmpegDemuxer. It
// simulates the reading requirements for playback by reading from the stream
// that has the earliest timestamp.
#include <iostream>
#include "base/at_exit.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "base/message_loop/message_loop.h"
#include "base/strings/string_number_conversions.h"
#include "media/base/media.h"
#include "media/base/media_log.h"
#include "media/filters/ffmpeg_demuxer.h"
#include "media/filters/file_data_source.h"
namespace switches {
const char kEnableBitstreamConverter[] = "enable-bitstream-converter";
} // namespace switches
class DemuxerHostImpl : public media::DemuxerHost {
public:
DemuxerHostImpl() {}
virtual ~DemuxerHostImpl() {}
// DataSourceHost implementation.
virtual void SetTotalBytes(int64 total_bytes) OVERRIDE {}
virtual void AddBufferedByteRange(int64 start, int64 end) OVERRIDE {}
virtual void AddBufferedTimeRange(base::TimeDelta start,
base::TimeDelta end) OVERRIDE {}
// DemuxerHost implementation.
virtual void SetDuration(base::TimeDelta duration) OVERRIDE {}
virtual void OnDemuxerError(media::PipelineStatus error) OVERRIDE {}
private:
DISALLOW_COPY_AND_ASSIGN(DemuxerHostImpl);
};
void QuitLoopWithStatus(base::MessageLoop* message_loop,
media::PipelineStatus status) {
CHECK_EQ(status, media::PIPELINE_OK);
message_loop->PostTask(FROM_HERE, base::MessageLoop::QuitWhenIdleClosure());
}
static void NeedKey(const std::string& type,
const std::vector<uint8>& init_data) {
LOG(INFO) << "File is encrypted.";
}
typedef std::vector<media::DemuxerStream* > Streams;
// Simulates playback reading requirements by reading from each stream
// present in |demuxer| in as-close-to-monotonically-increasing timestamp order.
class StreamReader {
public:
StreamReader(media::Demuxer* demuxer, bool enable_bitstream_converter);
~StreamReader();
// Performs a single step read.
void Read();
// Returns true when all streams have reached end of stream.
bool IsDone();
int number_of_streams() { return streams_.size(); }
const Streams& streams() { return streams_; }
const std::vector<int>& counts() { return counts_; }
private:
void OnReadDone(base::MessageLoop* message_loop,
bool* end_of_stream,
base::TimeDelta* timestamp,
media::DemuxerStream::Status status,
const scoped_refptr<media::DecoderBuffer>& buffer);
int GetNextStreamIndexToRead();
Streams streams_;
std::vector<bool> end_of_stream_;
std::vector<base::TimeDelta> last_read_timestamp_;
std::vector<int> counts_;
DISALLOW_COPY_AND_ASSIGN(StreamReader);
};
StreamReader::StreamReader(media::Demuxer* demuxer,
bool enable_bitstream_converter) {
media::DemuxerStream* stream =
demuxer->GetStream(media::DemuxerStream::AUDIO);
if (stream) {
streams_.push_back(stream);
end_of_stream_.push_back(false);
last_read_timestamp_.push_back(media::kNoTimestamp());
counts_.push_back(0);
}
stream = demuxer->GetStream(media::DemuxerStream::VIDEO);
if (stream) {
streams_.push_back(stream);
end_of_stream_.push_back(false);
last_read_timestamp_.push_back(media::kNoTimestamp());
counts_.push_back(0);
if (enable_bitstream_converter)
stream->EnableBitstreamConverter();
}
}
StreamReader::~StreamReader() {}
void StreamReader::Read() {
int index = GetNextStreamIndexToRead();
bool end_of_stream = false;
base::TimeDelta timestamp;
streams_[index]->Read(base::Bind(
&StreamReader::OnReadDone, base::Unretained(this),
base::MessageLoop::current(), &end_of_stream, ×tamp));
base::MessageLoop::current()->Run();
CHECK(end_of_stream || timestamp != media::kNoTimestamp());
end_of_stream_[index] = end_of_stream;
last_read_timestamp_[index] = timestamp;
counts_[index]++;
}
bool StreamReader::IsDone() {
for (size_t i = 0; i < end_of_stream_.size(); ++i) {
if (!end_of_stream_[i])
return false;
}
return true;
}
void StreamReader::OnReadDone(
base::MessageLoop* message_loop,
bool* end_of_stream,
base::TimeDelta* timestamp,
media::DemuxerStream::Status status,
const scoped_refptr<media::DecoderBuffer>& buffer) {
CHECK_EQ(status, media::DemuxerStream::kOk);
CHECK(buffer.get());
*end_of_stream = buffer->end_of_stream();
*timestamp = *end_of_stream ? media::kNoTimestamp() : buffer->timestamp();
message_loop->PostTask(FROM_HERE, base::MessageLoop::QuitWhenIdleClosure());
}
int StreamReader::GetNextStreamIndexToRead() {
int index = -1;
for (int i = 0; i < number_of_streams(); ++i) {
// Ignore streams at EOS.
if (end_of_stream_[i])
continue;
// Use a stream if it hasn't been read from yet.
if (last_read_timestamp_[i] == media::kNoTimestamp())
return i;
if (index < 0 ||
last_read_timestamp_[i] < last_read_timestamp_[index]) {
index = i;
}
}
CHECK_GE(index, 0) << "Couldn't find a stream to read";
return index;
}
int main(int argc, char** argv) {
base::AtExitManager at_exit;
media::InitializeMediaLibraryForTesting();
CommandLine::Init(argc, argv);
CommandLine* cmd_line = CommandLine::ForCurrentProcess();
if (cmd_line->GetArgs().empty()) {
std::cerr << "Usage: " << argv[0] << " [file]\n\n"
<< "Options:\n"
<< " --" << switches::kEnableBitstreamConverter
<< " Enables H.264 Annex B bitstream conversion"
<< std::endl;
return 1;
}
base::MessageLoop message_loop;
DemuxerHostImpl demuxer_host;
base::FilePath file_path(cmd_line->GetArgs()[0]);
// Setup.
media::FileDataSource data_source;
CHECK(data_source.Initialize(file_path));
media::Demuxer::NeedKeyCB need_key_cb = base::Bind(&NeedKey);
media::FFmpegDemuxer demuxer(message_loop.message_loop_proxy(),
&data_source,
need_key_cb,
new media::MediaLog());
demuxer.Initialize(&demuxer_host, base::Bind(
&QuitLoopWithStatus, &message_loop));
message_loop.Run();
StreamReader stream_reader(
&demuxer, cmd_line->HasSwitch(switches::kEnableBitstreamConverter));
// Benchmark.
base::TimeTicks start = base::TimeTicks::HighResNow();
while (!stream_reader.IsDone()) {
stream_reader.Read();
}
base::TimeTicks end = base::TimeTicks::HighResNow();
// Results.
std::cout << "Time: " << (end - start).InMillisecondsF() << " ms\n";
for (int i = 0; i < stream_reader.number_of_streams(); ++i) {
media::DemuxerStream* stream = stream_reader.streams()[i];
std::cout << "Stream #" << i << ": ";
if (stream->type() == media::DemuxerStream::AUDIO) {
std::cout << "audio";
} else if (stream->type() == media::DemuxerStream::VIDEO) {
std::cout << "video";
} else {
std::cout << "unknown";
}
std::cout << ", " << stream_reader.counts()[i] << " packets" << std::endl;
}
// Teardown.
demuxer.Stop(base::Bind(
&QuitLoopWithStatus, &message_loop, media::PIPELINE_OK));
message_loop.Run();
return 0;
}
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