blind

suckless command-line video editing utility
git clone git://git.suckless.org/blind
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commit f70ffc7f6e6331a56be4a52882c432133e40bd01
parent 509cd22048a070317e43a53c5c733f61d01e20a4
Author: Mattias Andrée <maandree@kth.se>
Date:   Fri, 21 Jul 2017 17:15:09 +0200

blind-split-chan: add -c

Signed-off-by: Mattias Andrée <maandree@kth.se>

Diffstat:
man/blind-split-chans.1 | 10++++++++++
src/blind-split-chans.c | 52+++++++++++++++++++++++++++++++++++++++-------------
2 files changed, 49 insertions(+), 13 deletions(-)

diff --git a/man/blind-split-chans.1 b/man/blind-split-chans.1 @@ -3,6 +3,7 @@ blind-split-chans - Split colour channels into separate videos .SH SYNOPSIS .B blind-split-chans +[-c] .I X-file .I Y-file .I Z-file @@ -37,6 +38,15 @@ in .IR Y-file , and .IR Z-file . +.SH OPTIONS +.TP +.B -c +Set the values to zero in all channels +except for channels matching their file. If +.I alpha-file +is omitted, the alpha values are still +stored in the alpha channel of the other +files. .SH SEE ALSO .BR blind (7), .BR blind-arithm (1), diff --git a/src/blind-split-chans.c b/src/blind-split-chans.c @@ -1,17 +1,27 @@ /* See LICENSE file for copyright and license details. */ #include "common.h" -USAGE("X-file Y-file Z-file [alpha-file]") +USAGE("[-c] X-file Y-file Z-file [alpha-file]") int main(int argc, char *argv[]) { struct stream stream; - char xbuf[BUFSIZ], ybuf[BUFSIZ], zbuf[BUFSIZ], abuf[BUFSIZ]; + char xbuf[sizeof(stream.buf)], ybuf[sizeof(xbuf)], zbuf[sizeof(xbuf)], abuf[sizeof(xbuf)]; int xfd, yfd, zfd, afd = -1; - size_t i, n, ptr; + size_t i, n, ptr, cs; + int all_channels = 1; - UNOFLAGS(argc != 3 && argc != 4); + ARGBEGIN { + case 'c': + all_channels = 0; + break; + default: + usage(); + } ARGEND; + + if (argc != 3 && argc != 4) + usage(); eopen_stream(&stream, NULL); @@ -30,20 +40,36 @@ main(int argc, char *argv[]) if (afd >= 0 && DPRINTF_HEAD(afd, stream.frames, stream.width, stream.height, stream.pixfmt) < 0) eprintf("dprintf %s:", argv[3]); - n = (stream.n_chan - (afd < 0)) * stream.chan_size; + if (!all_channels) { + memset(xbuf, 0, sizeof(xbuf)); + memset(ybuf, 0, sizeof(ybuf)); + memset(zbuf, 0, sizeof(zbuf)); + memset(abuf, 0, sizeof(abuf)); + } + + cs = stream.chan_size; + n = (stream.n_chan - (afd < 0)) * cs; do { for (ptr = 0; ptr + stream.pixel_size <= stream.ptr; ptr += stream.pixel_size) { - for (i = 0; i < n; i += stream.chan_size) { - memcpy(xbuf + ptr + i, stream.buf + ptr + 0 * stream.chan_size, stream.chan_size); - memcpy(ybuf + ptr + i, stream.buf + ptr + 1 * stream.chan_size, stream.chan_size); - memcpy(zbuf + ptr + i, stream.buf + ptr + 2 * stream.chan_size, stream.chan_size); + if (all_channels) { + for (i = 0; i < n; i += cs) { + memcpy(xbuf + ptr + i, stream.buf + ptr + 0 * cs, cs); + memcpy(ybuf + ptr + i, stream.buf + ptr + 1 * cs, cs); + memcpy(zbuf + ptr + i, stream.buf + ptr + 2 * cs, cs); + if (afd >= 0) + memcpy(abuf + ptr + i, stream.buf + ptr + 3 * cs, cs); + } + } else { + memcpy(xbuf + ptr + 0 * cs, stream.buf + ptr + 0 * cs, cs); + memcpy(ybuf + ptr + 1 * cs, stream.buf + ptr + 1 * cs, cs); + memcpy(zbuf + ptr + 2 * cs, stream.buf + ptr + 2 * cs, cs); if (afd >= 0) - memcpy(abuf + ptr + i, stream.buf + ptr + 3 * stream.chan_size, stream.chan_size); + memcpy(abuf + ptr + 3 * cs, stream.buf + ptr + 3 * cs, cs); } if (afd < 0) { - memcpy(xbuf + ptr + n, stream.buf + ptr + 3 * stream.chan_size, stream.chan_size); - memcpy(ybuf + ptr + n, stream.buf + ptr + 3 * stream.chan_size, stream.chan_size); - memcpy(zbuf + ptr + n, stream.buf + ptr + 3 * stream.chan_size, stream.chan_size); + memcpy(xbuf + ptr + n, stream.buf + ptr + 3 * cs, cs); + memcpy(ybuf + ptr + n, stream.buf + ptr + 3 * cs, cs); + memcpy(zbuf + ptr + n, stream.buf + ptr + 3 * cs, cs); } } ewriteall(xfd, xbuf, ptr, argv[0]);