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// Copyright 2014 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.
#ifndef MEDIA_CAST_TEST_UTILITY_BARCODE_H_
#define MEDIA_CAST_TEST_UTILITY_BARCODE_H_
#include <vector>
#include "base/memory/ref_counted.h"
namespace media {
class VideoFrame;
namespace cast {
namespace test {
// Encode a resilient barcode into |frame| containing all the bits
// from |bits|.
bool EncodeBarcode(const std::vector<bool>& bits,
scoped_refptr<media::VideoFrame> output_frame);
// Decode a barcode (encoded by EncodeBarCode) into |output|.
// |output| should already be sized to contain the right number
// of bits.
bool DecodeBarcode(const scoped_refptr<media::VideoFrame>& frame,
std::vector<bool>* output);
// Convenience templates that allows you to encode/decode numeric
// types directly.
template<class T>
bool EncodeBarcode(T data, scoped_refptr<media::VideoFrame> output_frame) {
std::vector<bool> bits(sizeof(T) * 8);
for (size_t i = 0; i < bits.size(); i++) {
bits[i] = ((data >> i) & 1) == 1;
}
return EncodeBarcode(bits, output_frame);
}
template<class T>
bool DecodeBarcode(scoped_refptr<media::VideoFrame> output_frame, T* data) {
std::vector<bool> bits(sizeof(T) * 8);
bool ret = DecodeBarcode(output_frame, &bits);
if (!ret) return false;
*data = 0;
for (size_t i = 0; i < bits.size(); i++) {
if (bits[i]) {
*data |= 1UL << i;
}
}
return true;
}
} // namespace test
} // namespace cast
} // namespace media
#endif // MEDIA_CAST_TEST_UTILITY_BARCODE_H_