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	common.h - blind - suckless command-line video editing utility
	git clone git://git.suckless.org/blind
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	---
	common.h (4899B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #if defined(__clang__)
	3 # pragma clang diagnostic ignored "-Wdisabled-macro-expansion"
	4 # pragma clang diagnostic ignored "-Wcomma"
	5 # pragma clang diagnostic ignored "-Wcast-align"
	6 # pragma clang diagnostic ignored "-Wassign-enum"
	7 # pragma clang diagnostic ignored "-Wfloat-equal"
	8 # pragma clang diagnostic ignored "-Wformat-nonliteral"
	9 # pragma clang diagnostic ignored "-Wcovered-switch-default"
	10 # pragma clang diagnostic ignored "-Wfloat-conversion"
	11 # pragma clang diagnostic ignored "-Wabsolute-value"
	12 # pragma clang diagnostic ignored "-Wconditional-uninitialized"
	13 # pragma clang diagnostic ignored "-Wunreachable-code-return"
	14 #elif defined(__GNUC__)
	15 # pragma GCC diagnostic ignored "-Wfloat-equal"
	16 # pragma GCC diagnostic ignored "-Wunsafe-loop-optimizations"
	17 # pragma GCC diagnostic ignored "-Wfloat-conversion"
	18 #endif
	19
	20 #include "../build/platform.h"
	21 #include "stream.h"
	22 #include "util.h"
	23 #include "video-math.h"
	24
	25 #include <arpa/inet.h>
	26 #if defined(HAVE_EPOLL)
	27 # include <sys/epoll.h>
	28 #endif
	29 #include <sys/mman.h>
	30 #if defined(HAVE_SENDFILE)
	31 # include <sys/sendfile.h>
	32 #endif
	33 #include <sys/stat.h>
	34 #include <sys/socket.h>
	35 #include <sys/uio.h>
	36 #include <sys/un.h>
	37 #include <sys/wait.h>
	38 #include <alloca.h>
	39 #include <ctype.h>
	40 #include <errno.h>
	41 #include <fcntl.h>
	42 #include <inttypes.h>
	43 #include <limits.h>
	44 #include <signal.h>
	45 #include <stdarg.h>
	46 #include <stdio.h>
	47 #include <stdlib.h>
	48 #include <string.h>
	49 #include <strings.h>
	50 #include <unistd.h>
	51
	52 #ifndef CMSG_ALIGN
	53 # ifdef __sun__
	54 # define CMSG_ALIGN _CMSG_DATA_ALIGN
	55 # else
	56 # define CMSG_ALIGN(len) (((len) + sizeof(long) - 1) & ~(sizeof(long) -…
	57 # endif
	58 #endif
	59
	60 #ifndef CMSG_SPACE
	61 # define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIG…
	62 #endif
	63
	64 #ifndef CMSG_LEN
	65 # define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
	66 #endif
	67
	68 #if !defined(PIPE_BUF)
	69 # define PIPE_BUF 512
	70 #endif
	71
	72 #ifndef DONT_INCLUDE_FLOAT
	73 # define SELECT_PROCESS_FUNCTION_FLOAT(stream) else if ((stream)->encodi…
	74 #else
	75 # define SELECT_PROCESS_FUNCTION_FLOAT(stream) else if (0)
	76 #endif
	77
	78 #ifndef DONT_INCLUDE_DOUBLE
	79 # define SELECT_PROCESS_FUNCTION_DOUBLE(stream) else if ((stream)->encod…
	80 #else
	81 # define SELECT_PROCESS_FUNCTION_DOUBLE(stream) else if (0)
	82 #endif
	83
	84 #ifdef INCLUDE_LONG_DOUBLE
	85 # define SELECT_PROCESS_FUNCTION_LONG_DOUBLE(stream) else if ((stream)->…
	86 #else
	87 # define SELECT_PROCESS_FUNCTION_LONG_DOUBLE(stream) else if (0)
	88 #endif
	89
	90 #ifdef INCLUDE_UINT8
	91 # define SELECT_PROCESS_FUNCTION_UINT8(stream) else if ((stream)->encodi…
	92 #else
	93 # define SELECT_PROCESS_FUNCTION_UINT8(stream) else if (0)
	94 #endif
	95
	96 #ifdef INCLUDE_UINT16
	97 # define SELECT_PROCESS_FUNCTION_UINT16(stream) else if ((stream)->encod…
	98 #else
	99 # define SELECT_PROCESS_FUNCTION_UINT16(stream) else if (0)
	100 #endif
	101
	102 #ifdef INCLUDE_UINT32
	103 # define SELECT_PROCESS_FUNCTION_UINT32(stream) else if ((stream)->encod…
	104 #else
	105 # define SELECT_PROCESS_FUNCTION_UINT32(stream) else if (0)
	106 #endif
	107
	108 #ifdef INCLUDE_UINT64
	109 # define SELECT_PROCESS_FUNCTION_UINT64(stream) else if ((stream)->encod…
	110 #else
	111 # define SELECT_PROCESS_FUNCTION_UINT64(stream) else if (0)
	112 #endif
	113
	114 #define SELECT_PROCESS_FUNCTION(stream)\
	115 do {\
	116 if ((stream)->endian != HOST)\
	117 eprintf("pixel format %s is not supported, try x…
	118 SELECT_PROCESS_FUNCTION_FLOAT(stream);\
	119 SELECT_PROCESS_FUNCTION_DOUBLE(stream);\
	120 SELECT_PROCESS_FUNCTION_LONG_DOUBLE(stream);\
	121 SELECT_PROCESS_FUNCTION_UINT8(stream);\
	122 SELECT_PROCESS_FUNCTION_UINT16(stream);\
	123 SELECT_PROCESS_FUNCTION_UINT32(stream);\
	124 SELECT_PROCESS_FUNCTION_UINT64(stream);\
	125 else\
	126 eprintf("pixel format %s is not supported, try x…
	127 } while (0)
	128
	129 #define CHECK_ALPHA_CHAN(stream)\
	130 do {\
	131 if ((stream)->alpha_chan != 3)\
	132 eprintf("pixel format %s is not supported, try x…
	133 } while (0)
	134
	135 #define CHECK_CHANS(stream, ALPHA, LUMA)\
	136 do {\
	137 if (!(((stream)->alpha_chan ALPHA) && ((stream)->luma_ch…
	138 eprintf("pixel format %s is not supported, try x…
	139 } while (0)
	140
	141 #define CHECK_ALPHA(stream)\
	142 do {\
	143 if ((stream)->alpha != UNPREMULTIPLIED)\
	144 eprintf("pixel format %s is not supported, try x…
	145 } while (0)
	146
	147 #define CHECK_COLOUR_SPACE(stream, colour_space)\
	148 do {\
	149 if ((stream)->space != (colour_space))\
	150 eprintf("pixel format %s is not supported, try x…
	151 } while (0)
	152
	153 #define CHECK_N_CHAN(stream, low, high)\
	154 do {\
	155 if ((stream)->n_chan < (low) \|\| (stream)->n_chan > (high…
	156 eprintf("pixel format %s is not supported, try x…
	157 } while (0)