/src/libjxl/lib/jxl/headers.cc

Source (jump to first uncovered line)
// Copyright (c) the JPEG XL 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.

#include "lib/jxl/headers.h"

#include "lib/jxl/fields.h"
#include "lib/jxl/frame_dimensions.h"

namespace jxl {
namespace {

struct Rational {
  constexpr explicit Rational(uint32_t num, uint32_t den)
      : num(num), den(den) {}

  // Returns floor(multiplicand * rational).
  constexpr uint32_t MulTruncate(uint32_t multiplicand) const {
    return static_cast<uint64_t>(multiplicand) * num / den;
  }

  uint32_t num;
  uint32_t den;
};

Rational FixedAspectRatios(uint32_t ratio) {
  JXL_ASSERT(0 != ratio && ratio < 8);
  // Other candidates: 5/4, 7/5, 14/9, 16/10, 5/3, 21/9, 12/5
  constexpr Rational kRatios[7] = {Rational(1, 1),    // square
                                   Rational(12, 10),  //
                                   Rational(4, 3),    // camera
                                   Rational(3, 2),    // mobile camera
                                   Rational(16, 9),   // camera/display
                                   Rational(5, 4),    //
                                   Rational(2, 1)};   //
  return kRatios[ratio - 1];
}

uint32_t FindAspectRatio(uint32_t xsize, uint32_t ysize) {
  for (uint32_t r = 1; r < 8; ++r) {
    if (xsize == FixedAspectRatios(r).MulTruncate(ysize)) {
      return r;
    }
  }
  return 0;  // Must send xsize instead
}

}  // namespace

size_t SizeHeader::xsize() const {
  if (ratio_ != 0) {
    return FixedAspectRatios(ratio_).MulTruncate(
        static_cast<uint32_t>(ysize()));
  }
  return small_ ? ((xsize_div8_minus_1_ + 1) * 8) : xsize_;
}

Status SizeHeader::Set(size_t xsize64, size_t ysize64) {
  if (xsize64 > 0xFFFFFFFFull || ysize64 > 0xFFFFFFFFull) {
    return JXL_FAILURE("Image too large");
  }
  const uint32_t xsize32 = static_cast<uint32_t>(xsize64);
  const uint32_t ysize32 = static_cast<uint32_t>(ysize64);
  if (xsize64 == 0 || ysize64 == 0) return JXL_FAILURE("Empty image");
  ratio_ = FindAspectRatio(xsize32, ysize32);
  small_ = ysize64 <= 256 && (ysize64 % kBlockDim) == 0 &&
           (ratio_ != 0 || (xsize64 <= 256 && (xsize64 % kBlockDim) == 0));
  if (small_) {
    ysize_div8_minus_1_ = ysize32 / 8 - 1;
  } else {
    ysize_ = ysize32;
  }

  if (ratio_ == 0) {
    if (small_) {
      xsize_div8_minus_1_ = xsize32 / 8 - 1;
    } else {
      xsize_ = xsize32;
    }
  }
  JXL_ASSERT(xsize() == xsize64);
  JXL_ASSERT(ysize() == ysize64);
  return true;
}

Status PreviewHeader::Set(size_t xsize64, size_t ysize64) {
  const uint32_t xsize32 = static_cast<uint32_t>(xsize64);
  const uint32_t ysize32 = static_cast<uint32_t>(ysize64);
  if (xsize64 == 0 || ysize64 == 0) return JXL_FAILURE("Empty preview");
  div8_ = (xsize64 % kBlockDim) == 0 && (ysize64 % kBlockDim) == 0;
  if (div8_) {
    ysize_div8_ = ysize32 / 8;
  } else {
    ysize_ = ysize32;
  }

  ratio_ = FindAspectRatio(xsize32, ysize32);
  if (ratio_ == 0) {
    if (div8_) {
      xsize_div8_ = xsize32 / 8;
    } else {
      xsize_ = xsize32;
    }
  }
  JXL_ASSERT(xsize() == xsize64);
  JXL_ASSERT(ysize() == ysize64);
  return true;
}

size_t PreviewHeader::xsize() const {
  if (ratio_ != 0) {
    return FixedAspectRatios(ratio_).MulTruncate(
        static_cast<uint32_t>(ysize()));
  }
  return div8_ ? (xsize_div8_ * 8) : xsize_;
}

SizeHeader::SizeHeader() { Bundle::Init(this); }
Status SizeHeader::VisitFields(Visitor* JXL_RESTRICT visitor) {
  JXL_QUIET_RETURN_IF_ERROR(visitor->Bool(false, &small_));

  if (visitor->Conditional(small_)) {
    JXL_QUIET_RETURN_IF_ERROR(visitor->Bits(5, 0, &ysize_div8_minus_1_));
  }
  if (visitor->Conditional(!small_)) {
    // (Could still be small, but non-multiple of 8.)
    JXL_QUIET_RETURN_IF_ERROR(visitor->U32(BitsOffset(9, 1), BitsOffset(13, 1),
                                           BitsOffset(18, 1), BitsOffset(30, 1),
                                           1, &ysize_));
  }

  JXL_QUIET_RETURN_IF_ERROR(visitor->Bits(3, 0, &ratio_));
  if (visitor->Conditional(ratio_ == 0 && small_)) {
    JXL_QUIET_RETURN_IF_ERROR(visitor->Bits(5, 0, &xsize_div8_minus_1_));
  }
  if (visitor->Conditional(ratio_ == 0 && !small_)) {
    JXL_QUIET_RETURN_IF_ERROR(visitor->U32(BitsOffset(9, 1), BitsOffset(13, 1),
                                           BitsOffset(18, 1), BitsOffset(30, 1),
                                           1, &xsize_));
  }

  return true;
}

PreviewHeader::PreviewHeader() { Bundle::Init(this); }
Status PreviewHeader::VisitFields(Visitor* JXL_RESTRICT visitor) {
  JXL_QUIET_RETURN_IF_ERROR(visitor->Bool(false, &div8_));

  if (visitor->Conditional(div8_)) {
    JXL_QUIET_RETURN_IF_ERROR(visitor->U32(Val(16), Val(32), BitsOffset(5, 1),
                                           BitsOffset(9, 33), 1, &ysize_div8_));
  }
  if (visitor->Conditional(!div8_)) {
    JXL_QUIET_RETURN_IF_ERROR(visitor->U32(BitsOffset(6, 1), BitsOffset(8, 65),
                                           BitsOffset(10, 321),
                                           BitsOffset(12, 1345), 1, &ysize_));
  }

  JXL_QUIET_RETURN_IF_ERROR(visitor->Bits(3, 0, &ratio_));
  if (visitor->Conditional(ratio_ == 0 && div8_)) {
    JXL_QUIET_RETURN_IF_ERROR(visitor->U32(Val(16), Val(32), BitsOffset(5, 1),
                                           BitsOffset(9, 33), 1, &xsize_div8_));
  }
  if (visitor->Conditional(ratio_ == 0 && !div8_)) {
    JXL_QUIET_RETURN_IF_ERROR(visitor->U32(BitsOffset(6, 1), BitsOffset(8, 65),
                                           BitsOffset(10, 321),
                                           BitsOffset(12, 1345), 1, &xsize_));
  }

  return true;
}

AnimationHeader::AnimationHeader() { Bundle::Init(this); }
Status AnimationHeader::VisitFields(Visitor* JXL_RESTRICT visitor) {
  JXL_QUIET_RETURN_IF_ERROR(visitor->U32(Val(100), Val(1000), BitsOffset(10, 1),
                                         BitsOffset(30, 1), 1, &tps_numerator));
  JXL_QUIET_RETURN_IF_ERROR(visitor->U32(Val(1), Val(1001), BitsOffset(8, 1),
                                         BitsOffset(10, 1), 1,
                                         &tps_denominator));

  JXL_QUIET_RETURN_IF_ERROR(
      visitor->U32(Val(0), Bits(3), Bits(16), Bits(32), 0, &num_loops));

  JXL_QUIET_RETURN_IF_ERROR(visitor->Bool(false, &have_timecodes));
  return true;
}

Status ReadSizeHeader(BitReader* JXL_RESTRICT reader,
                      SizeHeader* JXL_RESTRICT size) {
  return Bundle::Read(reader, size);
}

}  // namespace jxl

Line	Count	Source (jump to first uncovered line)
1		// Copyright (c) the JPEG XL Project Authors. All rights reserved.
2		//
3		// Use of this source code is governed by a BSD-style
4		// license that can be found in the LICENSE file.
5
6		#include "lib/jxl/headers.h"
7
8		#include "lib/jxl/fields.h"
9		#include "lib/jxl/frame_dimensions.h"
10
11		namespace jxl {
12		namespace {
13
14		struct Rational {
15		constexpr explicit Rational(uint32_t num, uint32_t den)
16	0	: num(num), den(den) {}
17
18		// Returns floor(multiplicand * rational).
19	0	constexpr uint32_t MulTruncate(uint32_t multiplicand) const {
20	0	return static_cast<uint64_t>(multiplicand) * num / den;
21	0	}
22
23		uint32_t num;
24		uint32_t den;
25		};
26
27	0	Rational FixedAspectRatios(uint32_t ratio) {
28	0	JXL_ASSERT(0 != ratio && ratio < 8);
29		// Other candidates: 5/4, 7/5, 14/9, 16/10, 5/3, 21/9, 12/5
30	0	constexpr Rational kRatios[7] = {Rational(1, 1), // square
31	0	Rational(12, 10), //
32	0	Rational(4, 3), // camera
33	0	Rational(3, 2), // mobile camera
34	0	Rational(16, 9), // camera/display
35	0	Rational(5, 4), //
36	0	Rational(2, 1)}; //
37	0	return kRatios[ratio - 1];
38	0	}
39
40	0	uint32_t FindAspectRatio(uint32_t xsize, uint32_t ysize) {
41	0	for (uint32_t r = 1; r < 8; ++r) {
42	0	if (xsize == FixedAspectRatios(r).MulTruncate(ysize)) {
43	0	return r;
44	0	}
45	0	}
46	0	return 0; // Must send xsize instead
47	0	}
48
49		} // namespace
50
51	0	size_t SizeHeader::xsize() const {
52	0	if (ratio_ != 0) {
53	0	return FixedAspectRatios(ratio_).MulTruncate(
54	0	static_cast<uint32_t>(ysize()));
55	0	}
56	0	return small_ ? ((xsize_div8_minus_1_ + 1) * 8) : xsize_;
57	0	}
58
59	0	Status SizeHeader::Set(size_t xsize64, size_t ysize64) {
60	0	if (xsize64 > 0xFFFFFFFFull \|\| ysize64 > 0xFFFFFFFFull) {
61	0	return JXL_FAILURE("Image too large");
62	0	}
63	0	const uint32_t xsize32 = static_cast<uint32_t>(xsize64);
64	0	const uint32_t ysize32 = static_cast<uint32_t>(ysize64);
65	0	if (xsize64 == 0 \|\| ysize64 == 0) return JXL_FAILURE("Empty image");
66	0	ratio_ = FindAspectRatio(xsize32, ysize32);
67	0	small_ = ysize64 <= 256 && (ysize64 % kBlockDim) == 0 &&
68	0	(ratio_ != 0 \|\| (xsize64 <= 256 && (xsize64 % kBlockDim) == 0));
69	0	if (small_) {
70	0	ysize_div8_minus_1_ = ysize32 / 8 - 1;
71	0	} else {
72	0	ysize_ = ysize32;
73	0	}
74
75	0	if (ratio_ == 0) {
76	0	if (small_) {
77	0	xsize_div8_minus_1_ = xsize32 / 8 - 1;
78	0	} else {
79	0	xsize_ = xsize32;
80	0	}
81	0	}
82	0	JXL_ASSERT(xsize() == xsize64);
83	0	JXL_ASSERT(ysize() == ysize64);
84	0	return true;
85	0	}
86
87	0	Status PreviewHeader::Set(size_t xsize64, size_t ysize64) {
88	0	const uint32_t xsize32 = static_cast<uint32_t>(xsize64);
89	0	const uint32_t ysize32 = static_cast<uint32_t>(ysize64);
90	0	if (xsize64 == 0 \|\| ysize64 == 0) return JXL_FAILURE("Empty preview");
91	0	div8_ = (xsize64 % kBlockDim) == 0 && (ysize64 % kBlockDim) == 0;
92	0	if (div8_) {
93	0	ysize_div8_ = ysize32 / 8;
94	0	} else {
95	0	ysize_ = ysize32;
96	0	}
97
98	0	ratio_ = FindAspectRatio(xsize32, ysize32);
99	0	if (ratio_ == 0) {
100	0	if (div8_) {
101	0	xsize_div8_ = xsize32 / 8;
102	0	} else {
103	0	xsize_ = xsize32;
104	0	}
105	0	}
106	0	JXL_ASSERT(xsize() == xsize64);
107	0	JXL_ASSERT(ysize() == ysize64);
108	0	return true;
109	0	}
110
111	0	size_t PreviewHeader::xsize() const {
112	0	if (ratio_ != 0) {
113	0	return FixedAspectRatios(ratio_).MulTruncate(
114	0	static_cast<uint32_t>(ysize()));
115	0	}
116	0	return div8_ ? (xsize_div8_ * 8) : xsize_;
117	0	}
118
119	0	SizeHeader::SizeHeader() { Bundle::Init(this); }
120	0	Status SizeHeader::VisitFields(Visitor* JXL_RESTRICT visitor) {
121	0	JXL_QUIET_RETURN_IF_ERROR(visitor->Bool(false, &small_));
122
123	0	if (visitor->Conditional(small_)) {
124	0	JXL_QUIET_RETURN_IF_ERROR(visitor->Bits(5, 0, &ysize_div8_minus_1_));
125	0	}
126	0	if (visitor->Conditional(!small_)) {
127		// (Could still be small, but non-multiple of 8.)
128	0	JXL_QUIET_RETURN_IF_ERROR(visitor->U32(BitsOffset(9, 1), BitsOffset(13, 1),
129	0	BitsOffset(18, 1), BitsOffset(30, 1),
130	0	1, &ysize_));
131	0	}
132
133	0	JXL_QUIET_RETURN_IF_ERROR(visitor->Bits(3, 0, &ratio_));
134	0	if (visitor->Conditional(ratio_ == 0 && small_)) {
135	0	JXL_QUIET_RETURN_IF_ERROR(visitor->Bits(5, 0, &xsize_div8_minus_1_));
136	0	}
137	0	if (visitor->Conditional(ratio_ == 0 && !small_)) {
138	0	JXL_QUIET_RETURN_IF_ERROR(visitor->U32(BitsOffset(9, 1), BitsOffset(13, 1),
139	0	BitsOffset(18, 1), BitsOffset(30, 1),
140	0	1, &xsize_));
141	0	}
142
143	0	return true;
144	0	}
145
146	0	PreviewHeader::PreviewHeader() { Bundle::Init(this); }
147	0	Status PreviewHeader::VisitFields(Visitor* JXL_RESTRICT visitor) {
148	0	JXL_QUIET_RETURN_IF_ERROR(visitor->Bool(false, &div8_));
149
150	0	if (visitor->Conditional(div8_)) {
151	0	JXL_QUIET_RETURN_IF_ERROR(visitor->U32(Val(16), Val(32), BitsOffset(5, 1),
152	0	BitsOffset(9, 33), 1, &ysize_div8_));
153	0	}
154	0	if (visitor->Conditional(!div8_)) {
155	0	JXL_QUIET_RETURN_IF_ERROR(visitor->U32(BitsOffset(6, 1), BitsOffset(8, 65),
156	0	BitsOffset(10, 321),
157	0	BitsOffset(12, 1345), 1, &ysize_));
158	0	}
159
160	0	JXL_QUIET_RETURN_IF_ERROR(visitor->Bits(3, 0, &ratio_));
161	0	if (visitor->Conditional(ratio_ == 0 && div8_)) {
162	0	JXL_QUIET_RETURN_IF_ERROR(visitor->U32(Val(16), Val(32), BitsOffset(5, 1),
163	0	BitsOffset(9, 33), 1, &xsize_div8_));
164	0	}
165	0	if (visitor->Conditional(ratio_ == 0 && !div8_)) {
166	0	JXL_QUIET_RETURN_IF_ERROR(visitor->U32(BitsOffset(6, 1), BitsOffset(8, 65),
167	0	BitsOffset(10, 321),
168	0	BitsOffset(12, 1345), 1, &xsize_));
169	0	}
170
171	0	return true;
172	0	}
173
174	0	AnimationHeader::AnimationHeader() { Bundle::Init(this); }
175	0	Status AnimationHeader::VisitFields(Visitor* JXL_RESTRICT visitor) {
176	0	JXL_QUIET_RETURN_IF_ERROR(visitor->U32(Val(100), Val(1000), BitsOffset(10, 1),
177	0	BitsOffset(30, 1), 1, &tps_numerator));
178	0	JXL_QUIET_RETURN_IF_ERROR(visitor->U32(Val(1), Val(1001), BitsOffset(8, 1),
179	0	BitsOffset(10, 1), 1,
180	0	&tps_denominator));
181
182	0	JXL_QUIET_RETURN_IF_ERROR(
183	0	visitor->U32(Val(0), Bits(3), Bits(16), Bits(32), 0, &num_loops));
184
185	0	JXL_QUIET_RETURN_IF_ERROR(visitor->Bool(false, &have_timecodes));
186	0	return true;
187	0	}
188
189		Status ReadSizeHeader(BitReader* JXL_RESTRICT reader,
190	0	SizeHeader* JXL_RESTRICT size) {
191	0	return Bundle::Read(reader, size);
192	0	}
193
194		} // namespace jxl

Coverage Report

Created: 2024-05-21 06:24