From 1c2315010ca3bd702c8b5c77cccd42c1a2fe3023 Mon Sep 17 00:00:00 2001 From: Takashi Sakamoto Date: Fri, 21 Dec 2018 20:48:44 +0900 Subject: [PATCH] axfer: add text for compatibility loss of sw parameter in libasound backend At present, some options for software parameters have actual effects in cases neither mmap operation nor timer-based scheduling model is used. For mmap operation, backward compatibility to aplay(1) is lost. This commit adds descriptions about it. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- axfer/axfer-transfer.1 | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/axfer/axfer-transfer.1 b/axfer/axfer-transfer.1 index 4c8e426..272e601 100644 --- a/axfer/axfer-transfer.1 +++ b/axfer/axfer-transfer.1 @@ -684,6 +684,42 @@ effect to use PCM buffer aligned to non\-interleaved order if a target device supports. As of 2018, PCM buffer of non\-interleaved order is hardly used by sound devices. +.TP +.I \-A, \-\-avail\-min +This option indicates threshold to wake up blocked process in a unit of +audio data frame. Against aplay(1) implementation, this option has no effect +with +.I \-\-mmap +option as well as +.I timer +of +.I \-\-sched\-model +option. + +.TP +.I \-R, \-\-start\-delay +This option indicates threshold to start prepared PCM substream in a unit of +audio data frame. Against aplay(1) implementation, this option has no effect +with +.I \-\-mmap +option as well as +.I timer +of +.I \-\-sched\-model +option. + +.TP +.I \-T, \-\-stop\-delay +This option indicates threshold to stop running PCM substream in a unit of +audio data frame. Against aplay(1) implementation, this option has no effect +with +.I \-\-mmap +option as well as +.I timer +of +.I \-\-sched\-model +option. + .TP .I \-\-max\-file\-time=# This option is unsupported. In aplay(1) implementation, the option has an