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/*
* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "webrtc/modules/remote_bitrate_estimator/test/bwe_test_baselinefile.h"
#include <stdio.h>
#include <algorithm>
#include <vector>
#include "webrtc/base/constructormagic.h"
#include "webrtc/base/scoped_ptr.h"
#include "webrtc/modules/remote_bitrate_estimator/test/bwe_test_fileutils.h"
#include "webrtc/modules/remote_bitrate_estimator/test/bwe_test_logging.h"
#include "webrtc/test/testsupport/fileutils.h"
namespace webrtc {
namespace testing {
namespace bwe {
// The format of BWE test baseline files is extremely simple:
// 1. All read/written entities are 32-bit unsigned integers in network byte
// order (Big Endian).
// 2. Files beging with a 2 word header containing a magic marker and file
// format version indicator. The Magic marker reads "BWE!" in a hex dump.
// 3. Each estimate is logged as a pair of words: time in milliseconds and
// estimated bit rate, in bits per second.
const uint32_t kMagicMarker = 0x42574521;
const uint32_t kFileVersion1 = 0x00000001;
const char kResourceSubDir[] = "remote_bitrate_estimator";
class BaseLineFileVerify : public BaseLineFileInterface {
public:
// If |allow_missing_file| is set, VerifyOrWrite() will return true even if
// the baseline file is missing. This is the default when verifying files, but
// not when updating (i.e. we always write it out if missing).
BaseLineFileVerify(const std::string& filepath, bool allow_missing_file)
: reader_(),
fail_to_read_response_(false) {
rtc::scoped_ptr<ResourceFileReader> reader;
reader.reset(ResourceFileReader::Create(filepath, "bin"));
if (!reader.get()) {
printf("WARNING: Missing baseline file for BWE test: %s.bin\n",
filepath.c_str());
fail_to_read_response_ = allow_missing_file;
} else {
uint32_t magic_marker = 0;
uint32_t file_version = 0;
if (reader->Read(&magic_marker) && magic_marker == kMagicMarker &&
reader->Read(&file_version) && file_version == kFileVersion1) {
reader_.swap(reader);
} else {
printf("WARNING: Bad baseline file header for BWE test: %s.bin\n",
filepath.c_str());
}
}
}
virtual ~BaseLineFileVerify() {}
virtual void Estimate(int64_t time_ms, uint32_t estimate_bps) {
if (reader_.get()) {
uint32_t read_ms = 0;
uint32_t read_bps = 0;
if (reader_->Read(&read_ms) && read_ms == time_ms &&
reader_->Read(&read_bps) && read_bps == estimate_bps) {
} else {
printf("ERROR: Baseline differs starting at: %d ms (%d vs %d)!\n",
static_cast<uint32_t>(time_ms), estimate_bps, read_bps);
reader_.reset(NULL);
}
}
}
virtual bool VerifyOrWrite() {
if (reader_.get()) {
if (reader_->IsAtEnd()) {
return true;
} else {
printf("ERROR: Baseline file contains more data!\n");
return false;
}
}
return fail_to_read_response_;
}
private:
rtc::scoped_ptr<ResourceFileReader> reader_;
bool fail_to_read_response_;
RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(BaseLineFileVerify);
};
class BaseLineFileUpdate : public BaseLineFileInterface {
public:
BaseLineFileUpdate(const std::string& filepath,
BaseLineFileInterface* verifier)
: verifier_(verifier),
output_content_(),
filepath_(filepath) {
output_content_.push_back(kMagicMarker);
output_content_.push_back(kFileVersion1);
}
virtual ~BaseLineFileUpdate() {}
virtual void Estimate(int64_t time_ms, uint32_t estimate_bps) {
verifier_->Estimate(time_ms, estimate_bps);
output_content_.push_back(static_cast<uint32_t>(time_ms));
output_content_.push_back(estimate_bps);
}
virtual bool VerifyOrWrite() {
if (!verifier_->VerifyOrWrite()) {
std::string dir_path = webrtc::test::OutputPath() + kResourceSubDir;
if (!webrtc::test::CreateDir(dir_path)) {
printf("WARNING: Cannot create output dir: %s\n", dir_path.c_str());
return false;
}
rtc::scoped_ptr<OutputFileWriter> writer;
writer.reset(OutputFileWriter::Create(filepath_, "bin"));
if (!writer.get()) {
printf("WARNING: Cannot create output file: %s.bin\n",
filepath_.c_str());
return false;
}
printf("NOTE: Writing baseline file for BWE test: %s.bin\n",
filepath_.c_str());
for (std::vector<uint32_t>::iterator it = output_content_.begin();
it != output_content_.end(); ++it) {
writer->Write(*it);
}
return true;
}
printf("NOTE: No change, not writing: %s\n", filepath_.c_str());
return true;
}
private:
rtc::scoped_ptr<BaseLineFileInterface> verifier_;
std::vector<uint32_t> output_content_;
std::string filepath_;
RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(BaseLineFileUpdate);
};
BaseLineFileInterface* BaseLineFileInterface::Create(
const std::string& filename, bool write_output_file) {
std::string filepath = filename;
std::replace(filepath.begin(), filepath.end(), '/', '_');
filepath = std::string(kResourceSubDir) + "/" + filepath;
rtc::scoped_ptr<BaseLineFileInterface> result;
result.reset(new BaseLineFileVerify(filepath, !write_output_file));
if (write_output_file) {
// Takes ownership of the |verifier| instance.
result.reset(new BaseLineFileUpdate(filepath, result.release()));
}
return result.release();
}
} // namespace bwe
} // namespace testing
} // namespace webrtc
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