81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
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/*
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* Copyright (c) 2010 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/media/base/videocommon.h"
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#include <limits.h> // For INT_MAX
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#include <math.h>
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#include <sstream>
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#include "webrtc/base/arraysize.h"
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#include "webrtc/base/common.h"
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namespace cricket {
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struct FourCCAliasEntry {
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uint32_t alias;
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uint32_t canonical;
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};
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static const FourCCAliasEntry kFourCCAliases[] = {
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{FOURCC_IYUV, FOURCC_I420},
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{FOURCC_YU16, FOURCC_I422},
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{FOURCC_YU24, FOURCC_I444},
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{FOURCC_YUYV, FOURCC_YUY2},
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{FOURCC_YUVS, FOURCC_YUY2},
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{FOURCC_HDYC, FOURCC_UYVY},
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{FOURCC_2VUY, FOURCC_UYVY},
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{FOURCC_JPEG, FOURCC_MJPG}, // Note: JPEG has DHT while MJPG does not.
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{FOURCC_DMB1, FOURCC_MJPG},
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{FOURCC_BA81, FOURCC_BGGR},
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{FOURCC_RGB3, FOURCC_RAW},
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{FOURCC_BGR3, FOURCC_24BG},
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{FOURCC_CM32, FOURCC_BGRA},
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{FOURCC_CM24, FOURCC_RAW},
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};
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uint32_t CanonicalFourCC(uint32_t fourcc) {
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for (uint32_t i = 0; i < arraysize(kFourCCAliases); ++i) {
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if (kFourCCAliases[i].alias == fourcc) {
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return kFourCCAliases[i].canonical;
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}
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}
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// Not an alias, so return it as-is.
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return fourcc;
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}
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// The C++ standard requires a namespace-scope definition of static const
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// integral types even when they are initialized in the declaration (see
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// [class.static.data]/4), but MSVC with /Ze is non-conforming and treats that
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// as a multiply defined symbol error. See Also:
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// http://msdn.microsoft.com/en-us/library/34h23df8.aspx
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#ifndef _MSC_EXTENSIONS
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const int64_t VideoFormat::kMinimumInterval; // Initialized in header.
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#endif
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std::string VideoFormat::ToString() const {
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std::string fourcc_name = GetFourccName(fourcc) + " ";
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for (std::string::const_iterator i = fourcc_name.begin();
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i < fourcc_name.end(); ++i) {
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// Test character is printable; Avoid isprint() which asserts on negatives.
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if (*i < 32 || *i >= 127) {
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fourcc_name = "";
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break;
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}
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}
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std::ostringstream ss;
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ss << fourcc_name << width << "x" << height << "x"
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<< IntervalToFpsFloat(interval);
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return ss.str();
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}
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} // namespace cricket
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