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axfer: print help for libffado backend

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This commit adds help texts for libffado backend.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2018-12-17 15:51:20 +09:00 committed by Takashi Iwai
parent 5a30b4d009
commit 7de9ddce44
1 changed files with 10 additions and 1 deletions
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11
axfer/xfer-libffado.c
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@ -539,7 +539,16 @@ static void xfer_libffado_destroy(struct xfer_context *xfer)
static void xfer_libffado_help(struct xfer_context *xfer)
{
printf(" (placeholder)\n");
printf(
" -p, --port decimal ID of port to decide 1394 OHCI controller for communication on IEEE 1394 bus\n"
" -n, --node decimal ID of node to decide unit on IEEE 1394 bus for transmission of audio data frame\n"
" -g, --guid hexadecimal ID for node on IEEE 1394 bus for transmission of audio data frame\n"
" --frames-per-period the number of audio data frame to handle one operation (frame unit)\n"
" --periods-per-bufer the number of periods in intermediate buffer between libffado (frame unit)\n"
" --slave receive frames from the other Linux system on IEEE 1394 bus running with libffado.\n"
" --snoop receive frames on packets of all isochronous channels.\n"
" --sched-priority set SCHED_FIFO with given priority. see RLIMIT_RTPRIO in getrlimit(2).\n"
);
}
const struct xfer_data xfer_libffado = {