stream.h - blind - suckless command-line video editing utility
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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 *)0)->pixfmt) + 10)
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, WIDTH, HEIGHT, PIXFMT), LENP)
19
20 #define SPRINTF_HEAD(BUF, FRAMES, WIDTH, HEIGHT, PIXFMT)\
21 sprintf(BUF, XPRINTF_HEAD_FMT, XPRINTF_HEAD_ARGS(FRAMES, WIDTH, HEIGHT, PIXFMT))
22
23 #define FPRINTF_HEAD(FP, FRAMES, WIDTH, HEIGHT, PIXFMT)\
24 fprintf(FP, XPRINTF_HEAD_FMT, XPRINTF_HEAD_ARGS(FRAMES, WIDTH, HEIGHT, PIXFMT))
25
26 #define DPRINTF_HEAD(FD, FRAMES, WIDTH, HEIGHT, PIXFMT)\
27 dprintf(FD, XPRINTF_HEAD_FMT, XPRINTF_HEAD_ARGS(FRAMES, WIDTH, HEIGHT, PIXFMT))
28
29 #define SPRINTF_HEAD_FMT(BUF, FFRAMES, FRAMES, FWIDTH, WIDTH, FHEIGHT, HEIGHT, PIXFMT)\
30 sprintf(BUF, XPRINTF_HEAD_FMT_FMT(FFRAMES, FWIDTH, FHEIGHT), XPRINTF_HEAD_FMT_ARGS(FRAMES, WIDTH, HEIGHT, PIXFMT))
31
32 #define FPRINTF_HEAD_FMT(FP, FFRAMES, FRAMES, FWIDTH, WIDTH, FHEIGHT, HEIGHT, PIXFMT)\
33 fprintf(FP, XPRINTF_HEAD_FMT_FMT(FFRAMES, FWIDTH, FHEIGHT), XPRINTF_HEAD_FMT_ARGS(FRAMES, WIDTH, HEIGHT, PIXFMT))
34
35 #define DPRINTF_HEAD_FMT(FD, FFRAMES, FRAMES, FWIDTH, WIDTH, FHEIGHT, HEIGHT, PIXFMT)\
36 dprintf(FD, XPRINTF_HEAD_FMT_FMT(FFRAMES, FWIDTH, FHEIGHT), XPRINTF_HEAD_FMT_ARGS(FRAMES, WIDTH, HEIGHT, PIXFMT))
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_ARGS__)
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_segmented(1, __VA_ARGS__)
57 #define process_two_streams(...) nprocess_two_streams(1, __VA_ARGS__)
58 #define process_multiple_streams(...) nprocess_multiple_streams(1, __VA_ARGS__)
59 #define process_each_frame_two_streams(...) nprocess_each_frame_two_streams(1, __VA_ARGS__)
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 *pixfmt);
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 dimension dimensions, const char *prefix);
130 void encheck_compat(int status, const struct stream *a, const struct stream *b);
131 const char *get_pixel_format(const char *specified, const char *current);
132 const char *nselect_print_format(int status, const char *format, enum encoding encoding, const char *fmt);
133 int enread_segment(int status, struct stream *stream, void *buf, size_t n);
134 size_t ensend_frames(int status, struct stream *stream, int outfd, size_t frames, const char *outfname);
135 size_t ensend_rows(int status, struct stream *stream, int outfd, size_t rows, const char *outfname);
136 size_t ensend_pixels(int status, struct stream *stream, int outfd, size_t pixels, const char *outfname);
137 int ensend_stream(int status, struct stream *stream, int outfd, const char *outfname);
138
139 void nprocess_stream(int status, struct stream *stream, void (*process)(struct stream *stream, size_t n));
140
141 void nprocess_each_frame_segmented(int status, struct stream *stream, int output_fd, const char* output_fname,
142 void (*process)(struct stream *stream, size_t n, size_t frame));
143
144 void nprocess_two_streams(int status, struct stream *left, struct stream *right, int output_fd, const char* output_fname,
145 void (*process)(struct stream *left, struct stream *right, size_t n));
146
147 void nprocess_multiple_streams(int status, struct stream *streams, size_t n_streams, int output_fd, const char* output_fname,
148 int shortest, void (*process)(struct stream *streams, size_t n_streams, size_t n));
149
150 void nprocess_each_frame_two_streams(int status, struct stream *left, struct stream *right, int output_fd, const char* output_fname,
151 void (*process)(char *restrict output, char *restrict lbuf, char *restrict rbuf,
152 struct stream *left, struct stream *right));
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_t frames,
168 size_t pixel_size, const char *prefix, const char *fname)
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 }