1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2010-2017 L-SMASH project
6 * Authors: Yusuke Nakamura <muken.the.vfrmaniac@gmail.com>
8 * Permission to use, copy, modify, and/or distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 *****************************************************************************/
21 /* This file is available under an ISC license. */
26 #define debug_if(x) if(x)
28 #define LSMASH_MAX( a, b ) ((a) > (b) ? (a) : (b))
29 #define LSMASH_MIN( a, b ) ((a) < (b) ? (a) : (b))
31 #define EXPAND_VA_ARGS( ... ) __VA_ARGS__
34 * Use only CALL_FUNC_DEFAULT_ARGS().
35 * The defined macros can't be passed a macro argument requiring the empty parameter list.
37 * The following is an example.
38 * #define TEMPLATE_A( ... ) CALL_FUNC_DEFAULT_ARGS( TEMPLATE_A, __VA_ARGS__ )
39 * #define TEMPLATE_A_1( _1 ) _1( 1 )
40 * #define TEMPLATE_B( ... ) CALL_FUNC_DEFAULT_ARGS( TEMPLATE_B, __VA_ARGS__ )
41 * #define TEMPLATE_B_2( _1, _2 ) ((_1) + (_2))
42 * #define TEMPLATE_B_1( _1 ) TEMPLATE_B_2( _1, 0 )
43 * #define TEMPLATE_B_0()
46 * TEMPLATE_A( TEMPLATE_B_1 ); // OK
47 * TEMPLATE_A( TEMPLATE_B ); // NG
48 * TEMPLATE_B( 1, 2 ); // OK
53 #define NUM_ARGS( _0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, ... ) _12
55 #define COUNT_NUM_ARGS( ... ) EXPAND_VA_ARGS( NUM_ARGS( __VA_ARGS__, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 0 ) )
57 #define COUNT_NUM_ARGS( ... ) NUM_ARGS( __VA_ARGS__, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 0 )
59 #define GET_FUNC_BY_NUM_ARGS_EXN( func_name, N ) func_name ## _ ## N
60 #define GET_FUNC_BY_NUM_ARGS_EX0( func_name, N ) GET_FUNC_BY_NUM_ARGS_EXN( func_name, N )
61 #define GET_FUNC_BY_NUM_ARGS_EX1( func_name, ... ) GET_FUNC_BY_NUM_ARGS_EX0( func_name, COUNT_NUM_ARGS( __VA_ARGS__ ) )
62 #define CALL_FUNC_DEFAULT_ARGS( func_name, ... ) GET_FUNC_BY_NUM_ARGS_EX1( func_name, __VA_ARGS__ ) ( __VA_ARGS__ )
68 size_t log_level_offset
; /* offset in the struct where 'log_level' is placed
69 * If set to 0, 'log_level' is unavailable and implicitly set to LSMASH_LOG_INFO. */
73 double lsmash_fixed2double( uint64_t value
, int frac_width
);
74 float lsmash_int2float32( uint32_t value
);
75 double lsmash_int2float64( uint64_t value
);
90 } lsmash_rational_u64_t
;
96 } lsmash_rational_s64_t
;
101 lsmash_log_level level
,
106 void lsmash_log_refresh_line
111 uint32_t lsmash_count_bits
120 const char *format
, ...
128 int lsmash_compare_dts
130 const lsmash_media_ts_t
*a
,
131 const lsmash_media_ts_t
*b
134 int lsmash_compare_cts
136 const lsmash_media_ts_t
*a
,
137 const lsmash_media_ts_t
*b
140 static inline uint64_t lsmash_get_gcd
158 static inline uint64_t lsmash_get_lcm
166 return (a
/ lsmash_get_gcd( a
, b
)) * b
;
169 static inline void lsmash_reduce_fraction
177 uint64_t gcd
= lsmash_get_gcd( *a
, *b
);
185 static inline void lsmash_reduce_fraction_su
193 uint64_t c
= *a
> 0 ? *a
: -(*a
);
194 uint64_t gcd
= lsmash_get_gcd( c
, *b
);
199 *a
= *a
> 0 ? (signed)c
: -(signed)c
;