diff options
Diffstat (limited to 'commands/beep.c')
-rw-r--r-- | commands/beep.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/commands/beep.c b/commands/beep.c new file mode 100644 index 0000000000..29569fb51a --- /dev/null +++ b/commands/beep.c @@ -0,0 +1,99 @@ +// SPDX-License-Identifier: GPL-2.0-only +// SPDX-FileCopyrightText: © 2021 Ahmad Fatoum + +#include <common.h> +#include <command.h> +#include <sound.h> +#include <getopt.h> + +static int do_beep(int argc, char *argv[]) +{ + int ret, i, opt; + u32 tempo, total_us = 0; + bool wait = false; + + while((opt = getopt(argc, argv, "wc")) > 0) { + switch(opt) { + case 'w': + wait = true; + break; + case 'c': + return beep_cancel(); + default: + return COMMAND_ERROR_USAGE; + } + } + + argc -= optind; + argv += optind; + + if (argc == 0 || argc % 2 != 1) + return COMMAND_ERROR_USAGE; + + ret = kstrtou32(argv[0], 0, &tempo); + if (ret || tempo == 0) + return COMMAND_ERROR_USAGE; + + tempo = 60 * USEC_PER_SEC / tempo; + + if (argc == 1) { + ret = beep(BELL_DEFAULT_FREQUENCY, tempo); + if (ret) + return ret; + + total_us += tempo; + goto out; + } + + for (i = 1; i < argc; i += 2) { + u32 pitch = 0, duration; + u16 val; + + ret = kstrtou16(argv[i], 0, &val); + if (ret) + return COMMAND_ERROR_USAGE; + + if (val) + pitch = clamp_t(unsigned, val, 20, 20000); + + ret = kstrtou16(argv[i+1], 0, &val); + if (ret) + return COMMAND_ERROR_USAGE; + + duration = val * tempo; + + ret = beep(pitch, duration); + if (ret) + return ret; + + total_us += duration; + } + +out: + if (wait) + beep_wait(total_us); + + return 0; +} + +/* https://www.gnu.org/software/grub/manual/grub/html_node/play.html */ +BAREBOX_CMD_HELP_START(beep) +BAREBOX_CMD_HELP_TEXT("Tempo is an unsigned 32bit number. It's followed by pairs of unsigned") +BAREBOX_CMD_HELP_TEXT("16bit numbers for pitch and duration.") +BAREBOX_CMD_HELP_TEXT("The tempo is the base for all note durations. 60 gives a 1-second base,") +BAREBOX_CMD_HELP_TEXT("120 gives a half-second base, etc. Pitches are Hz.") +BAREBOX_CMD_HELP_TEXT("Set pitch to 0 to produce a rest.") +BAREBOX_CMD_HELP_TEXT("When only tempo is given, a beep of duration 1 at bell frequency results.") +BAREBOX_CMD_HELP_TEXT("") +BAREBOX_CMD_HELP_TEXT("Options:") +BAREBOX_CMD_HELP_OPT ("-c", "cancel pending beeps") +BAREBOX_CMD_HELP_OPT ("-w", "wait until beep is over") +BAREBOX_CMD_HELP_END + +BAREBOX_CMD_START(beep) + .cmd = do_beep, + BAREBOX_CMD_DESC("play a GRUB beep tune") + BAREBOX_CMD_OPTS("tempo [pitch1 duration1 [pitch2 duration2] ...]") + BAREBOX_CMD_HELP(cmd_beep_help) + BAREBOX_CMD_GROUP(CMD_GRP_CONSOLE) +BAREBOX_CMD_END |