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/*
* This file is part of libplacebo.
*
* libplacebo is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* libplacebo is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with libplacebo. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#define __STDC_FORMAT_MACROS
#ifdef __cplusplus
#include <version>
#endif
#if !defined(__cplusplus) || defined(__cpp_lib_stdatomic_h)
#define PL_HAVE_STDATOMIC
#endif
#ifdef PL_HAVE_STDATOMIC
#include <stdatomic.h>
#endif
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <inttypes.h>
#if defined(__MINGW32__) && !defined(__clang__)
#define PL_PRINTF(fmt, va) __attribute__ ((format(gnu_printf, fmt, va))) \
__attribute__ ((nonnull(fmt)))
#elif defined(__GNUC__)
#define PL_PRINTF(fmt, va) __attribute__ ((format(printf, fmt, va))) \
__attribute__ ((nonnull(fmt)))
#else
#define PL_PRINTF(fmt, va)
#endif
#define PL_NOINLINE __attribute__((noinline))
#include "os.h"
#include "config_internal.h"
#define PL_DEPRECATED
#include <libplacebo/config.h>
#include "pl_assert.h"
#include "pl_alloc.h"
#include "pl_clock.h"
#include "pl_string.h"
#if PL_API_VER != BUILD_API_VER
#error Header mismatch? <libplacebo/config.h> pulled from elsewhere!
#endif
// Divide a number while rounding up (careful: double-eval)
#define PL_DIV_UP(x, y) (((x) + (y) - 1) / (y))
// Align up to the nearest multiple of an arbitrary alignment, which may also
// be 0 to signal no alignment requirements.
#define PL_ALIGN(x, align) ((align) ? PL_DIV_UP(x, align) * (align) : (x))
// This is faster but must only be called on positive powers of two.
#define PL_ALIGN2(x, align) (((x) + (align) - 1) & ~((align) - 1))
// Returns the log base 2 of an unsigned long long
#define PL_LOG2(x) ((unsigned) (8*sizeof (unsigned long long) - __builtin_clzll((x)) - 1))
// Rounds a number up to the nearest power of two
#define PL_ALIGN_POT(x) (0x1LLU << (PL_LOG2((x) - 1) + 1))
// Right shift a number while rounding up
#define PL_RSHIFT_UP(x, s) -((-(x)) >> (s))
// Returns whether or not a number is a power of two (or zero)
#define PL_ISPOT(x) (((x) & ((x) - 1)) == 0)
// Returns the size of a static array with known size.
#define PL_ARRAY_SIZE(s) (sizeof(s) / sizeof((s)[0]))
// Swaps two variables
#define PL_SWAP(a, b) \
do { \
__typeof__ (a) _tmp = (a); \
(a) = (b); \
(b) = _tmp; \
} while (0)
// Helper functions for transposing a matrix in-place.
#define PL_TRANSPOSE_DIM(d, m) \
pl_transpose((d), (float[(d)*(d)]){0}, (const float *)(m))
#define PL_TRANSPOSE_2X2(m) PL_TRANSPOSE_DIM(2, m)
#define PL_TRANSPOSE_3X3(m) PL_TRANSPOSE_DIM(3, m)
#define PL_TRANSPOSE_4X4(m) PL_TRANSPOSE_DIM(4, m)
static inline float *pl_transpose(int dim, float *out, const float *in)
{
for (int i = 0; i < dim; i++) {
for (int j = 0; j < dim; j++)
out[i * dim + j] = in[j * dim + i];
}
return out;
}
// Helper functions for some common numeric operations (careful: double-eval)
#define PL_MAX(x, y) ((x) > (y) ? (x) : (y))
#define PL_MAX3(x, y, z) PL_MAX(PL_MAX(x, y), z)
#define PL_MIN(x, y) ((x) < (y) ? (x) : (y))
#define PL_CLAMP(x, l, h) ((x) < (l) ? (l) : (x) > (h) ? (h) : (x))
#define PL_CMP(a, b) (((a) > (b)) - ((a) < (b)))
#define PL_DEF(x, d) ((x) ? (x) : (d))
#define PL_SQUARE(x) ((x) * (x))
#define PL_CUBE(x) ((x) * (x) * (x))
#define PL_MIX(a, b, x) ((x) * (b) + (1 - (x)) * (a))
static inline float pl_smoothstep(float edge0, float edge1, float x)
{
if (edge0 == edge1)
return x >= edge0;
x = (x - edge0) / (edge1 - edge0);
x = PL_CLAMP(x, 0.0f, 1.0f);
return x * x * (3.0f - 2.0f * x);
}
// Helpers for doing alignment calculations
static inline size_t pl_gcd(size_t x, size_t y)
{
assert(x && y);
while (y) {
size_t tmp = y;
y = x % y;
x = tmp;
}
return x;
}
static inline size_t pl_lcm(size_t x, size_t y)
{
assert(x && y);
return x * (y / pl_gcd(x, y));
}
// Conditional abort() macro that depends on the configuration option
#ifdef PL_DEBUG_ABORT
# define pl_debug_abort() do { \
fprintf(stderr, "pl_debug_abort() triggered!\n"); \
abort(); \
} while (0)
#else
# define pl_debug_abort() do {} while (0)
#endif
#ifdef PL_HAVE_STDATOMIC
// Refcounting helpers
typedef atomic_uint_fast32_t pl_rc_t;
#define pl_rc_init(rc) atomic_init(rc, 1)
#define pl_rc_ref(rc) ((void) atomic_fetch_add_explicit(rc, 1, memory_order_acquire))
#define pl_rc_deref(rc) (atomic_fetch_sub_explicit(rc, 1, memory_order_release) == 1)
#define pl_rc_count(rc) atomic_load(rc)
#endif
#define pl_unreachable() (assert(!"unreachable"), __builtin_unreachable())
// Helper for parameter validation
#define pl_require(ctx, expr) \
do { \
if (!(expr)) { \
PL_ERR(ctx, "Validation failed: %s (%s:%d)", \
#expr, __FILE__, __LINE__); \
pl_log_stack_trace(ctx->log, PL_LOG_ERR); \
pl_debug_abort(); \
goto error; \
} \
} while (0)
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