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	stream.h - blind - suckless command-line video editing utility
	git clone git://git.suckless.org/blind
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	stream.h (7298B)
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	1 /* See LICENSE file for copyright and license details. */
	2 #include <limits.h>
	3 #include <stddef.h>
	4 #include <stdio.h>
	5
	6 #define STREAM_HEAD_MAX (3 * INTSTRLEN(size_t) + sizeof(((struct stream …
	7
	8 #define XPRINTF_HEAD_FMT "%zu %zu %zu %s\n%cuivf"
	9 #define XPRINTF_HEAD_ARGS(FRAMES, WIDTH, HEIGHT, PIXFMT)\
	10 (size_t)(FRAMES), (size_t)(WIDTH), (size_t)(HEIGHT), (PIXFMT), 0
	11
	12 #define XPRINTF_HEAD_FMT_FMT(FFRAMES, FWIDTH, FHEIGHT)\
	13 FFRAMES" "FWIDTH" "FHEIGHT" %s\n%cuivf"
	14 #define XPRINTF_HEAD_FMT_ARGS(FRAMES, WIDTH, HEIGHT, PIXFMT)\
	15 (FRAMES), (WIDTH), (HEIGHT), (PIXFMT), 0
	16
	17 #define SPRINTF_HEAD_ZN(BUF, FRAMES, WIDTH, HEIGHT, PIXFMT, LENP)\
	18 sprintf(BUF, XPRINTF_HEAD_FMT"%zn", XPRINTF_HEAD_ARGS(FRAMES, WI…
	19
	20 #define SPRINTF_HEAD(BUF, FRAMES, WIDTH, HEIGHT, PIXFMT)\
	21 sprintf(BUF, XPRINTF_HEAD_FMT, XPRINTF_HEAD_ARGS(FRAMES, WIDTH, …
	22
	23 #define FPRINTF_HEAD(FP, FRAMES, WIDTH, HEIGHT, PIXFMT)\
	24 fprintf(FP, XPRINTF_HEAD_FMT, XPRINTF_HEAD_ARGS(FRAMES, WIDTH, H…
	25
	26 #define DPRINTF_HEAD(FD, FRAMES, WIDTH, HEIGHT, PIXFMT)\
	27 dprintf(FD, XPRINTF_HEAD_FMT, XPRINTF_HEAD_ARGS(FRAMES, WIDTH, H…
	28
	29 #define SPRINTF_HEAD_FMT(BUF, FFRAMES, FRAMES, FWIDTH, WIDTH, FHEIGHT, H…
	30 sprintf(BUF, XPRINTF_HEAD_FMT_FMT(FFRAMES, FWIDTH, FHEIGHT), XPR…
	31
	32 #define FPRINTF_HEAD_FMT(FP, FFRAMES, FRAMES, FWIDTH, WIDTH, FHEIGHT, HE…
	33 fprintf(FP, XPRINTF_HEAD_FMT_FMT(FFRAMES, FWIDTH, FHEIGHT), XPRI…
	34
	35 #define DPRINTF_HEAD_FMT(FD, FFRAMES, FRAMES, FWIDTH, WIDTH, FHEIGHT, HE…
	36 dprintf(FD, XPRINTF_HEAD_FMT_FMT(FFRAMES, FWIDTH, FHEIGHT), XPRI…
	37
	38 #define einit_stream(...) eninit_stream(1, __VA_ARGS__)
	39 #define eopen_stream(...) enopen_stream(1, __VA_ARGS__)
	40 #define eset_pixel_format(...) enset_pixel_format(1, __VA_ARGS__)
	41 #define eread_stream(...) enread_stream(1, __VA_ARGS__)
	42 #define einf_check_fd(...) eninf_check_fd(1, __VA_ARGS__)
	43 #define echeck_dimensions(...) encheck_dimensions(1, __VA_ARGS__)
	44 #define echeck_dimensions_custom(...) encheck_dimensions_custom(1, __VA_…
	45 #define echeck_compat(...) encheck_compat(1, __VA_ARGS__)
	46 #define select_print_format(...) nselect_print_format(1, __VA_ARGS_…
	47 #define eread_segment(...) enread_segment(1, __VA_ARGS__)
	48 #define eread_frame(...) enread_frame(1, __VA_ARGS__)
	49 #define eread_row(...) enread_row(1, __VA_ARGS__)
	50 #define esend_frames(...) ensend_frames(1, __VA_ARGS__)
	51 #define esend_rows(...) ensend_rows(1, __VA_ARGS__)
	52 #define esend_pixels(...) ensend_pixels(1, __VA_ARGS__)
	53 #define esend_stream(...) ensend_stream(1, __VA_ARGS__)
	54
	55 #define process_stream(...) nprocess_stream(1, __VA_ARGS…
	56 #define process_each_frame_segmented(...) nprocess_each_frame_segmente…
	57 #define process_two_streams(...) nprocess_two_streams(1, __VA…
	58 #define process_multiple_streams(...) nprocess_multiple_streams(1,…
	59 #define process_each_frame_two_streams(...) nprocess_each_frame_two_stre…
	60
	61 enum dimension {
	62 WIDTH = 1,
	63 HEIGHT = 2,
	64 LENGTH = 4
	65 };
	66
	67 enum colour_space {
	68 CIEXYZ,
	69 YUV_NONLINEAR,
	70 SRGB_NONLINEAR,
	71 SRGB
	72 };
	73
	74 enum alpha {
	75 NO_ALPHA,
	76 UNPREMULTIPLIED,
	77 PREMULTIPLIED /* not used */
	78 };
	79
	80 enum encoding {
	81 FLOAT,
	82 DOUBLE,
	83 LONG_DOUBLE, /* not used */
	84 UINT8, /* not used */
	85 UINT16,
	86 UINT32, /* not used */
	87 UINT64 /* not used */
	88 };
	89
	90 enum endian {
	91 HOST,
	92 LITTLE,
	93 BIG /* not used */
	94 };
	95
	96 struct stream {
	97 size_t frames;
	98 size_t width;
	99 size_t height;
	100 size_t n_chan;
	101 size_t chan_size;
	102 size_t pixel_size;
	103 char pixfmt[32];
	104 enum colour_space space;
	105 enum alpha alpha;
	106 enum encoding encoding;
	107 enum endian endian;
	108 short int alpha_chan;
	109 short int luma_chan;
	110 int fd;
	111 size_t ptr;
	112 size_t xptr;
	113 char buf[BUFSIZ];
	114 const char *file;
	115 size_t headlen;
	116 size_t row_size;
	117 size_t col_size;
	118 size_t frame_size;
	119 };
	120
	121 void eninit_stream(int status, struct stream *stream);
	122 void enopen_stream(int status, struct stream stream, const char file);
	123 int set_pixel_format(struct stream stream, const char pixfmt);
	124 void enset_pixel_format(int status, struct stream stream, const char p…
	125 void fprint_stream_head(FILE fp, struct stream stream);
	126 int dprint_stream_head(int fd, struct stream *stream);
	127 size_t enread_stream(int status, struct stream *stream, size_t n);
	128 void eninf_check_fd(int status, int fd, const char *file);
	129 void encheck_dimensions(int status, const struct stream *stream, enum di…
	130 void encheck_compat(int status, const struct stream *a, const struct str…
	131 const char get_pixel_format(const char specified, const char *current);
	132 const char nselect_print_format(int status, const char format, enum en…
	133 int enread_segment(int status, struct stream stream, void buf, size_t …
	134 size_t ensend_frames(int status, struct stream *stream, int outfd, size_…
	135 size_t ensend_rows(int status, struct stream *stream, int outfd, size_t …
	136 size_t ensend_pixels(int status, struct stream *stream, int outfd, size_…
	137 int ensend_stream(int status, struct stream *stream, int outfd, const ch…
	138
	139 void nprocess_stream(int status, struct stream stream, void (process)(…
	140
	141 void nprocess_each_frame_segmented(int status, struct stream *stream, in…
	142 void (process)(struct stream stream…
	143
	144 void nprocess_two_streams(int status, struct stream *left, struct stream…
	145 void (process)(struct stream left, struct st…
	146
	147 void nprocess_multiple_streams(int status, struct stream *streams, size_…
	148 int shortest, void (*process)(struct stre…
	149
	150 void nprocess_each_frame_two_streams(int status, struct stream *left, st…
	151 void (process)(char restrict outp…
	152 struct stream *left…
	153
	154 static inline int
	155 enread_frame(int status, struct stream stream, void buf)
	156 {
	157 return enread_segment(status, stream, buf, stream->frame_size);
	158 }
	159
	160 static inline int
	161 enread_row(int status, struct stream stream, void buf)
	162 {
	163 return enread_segment(status, stream, buf, stream->row_size);
	164 }
	165
	166 static inline void
	167 encheck_dimensions_custom(int status, size_t width, size_t height, size_…
	168 size_t pixel_size, const char *prefix, const c…
	169 {
	170 enum dimension dims = 0;
	171 struct stream stream;
	172 dims \|= width ? WIDTH : 0;
	173 dims \|= height ? HEIGHT : 0;
	174 dims \|= frames ? LENGTH : 0;
	175 stream.width = width;
	176 stream.height = height;
	177 stream.frames = frames;
	178 stream.pixel_size = pixel_size;
	179 stream.file = fname;
	180 encheck_dimensions(status, &stream, dims, prefix);
	181 }