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[src/trunk]: src/sys/dev For the virtual stream it is required to insert sile...
details: https://anonhg.NetBSD.org/src/rev/db862559c040
branches: trunk
changeset: 827855:db862559c040
user: nat <nat%NetBSD.org@localhost>
date: Wed Nov 15 04:28:45 2017 +0000
description:
For the virtual stream it is required to insert silence. As these streams
are not harware streams audio_pint_silence is ineffective.
As audio_mix() was the only consumer of audio_pint_silence it has been
removed along with sc_sil_count - which was only used by this function.
diffstat:
sys/dev/audio.c | 75 +++--------------------------------------------------
sys/dev/audiovar.h | 3 +-
2 files changed, 6 insertions(+), 72 deletions(-)
diffs (154 lines):
diff -r 4638834c740a -r db862559c040 sys/dev/audio.c
--- a/sys/dev/audio.c Wed Nov 15 04:08:02 2017 +0000
+++ b/sys/dev/audio.c Wed Nov 15 04:28:45 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: audio.c,v 1.437 2017/11/15 02:13:33 nat Exp $ */
+/* $NetBSD: audio.c,v 1.438 2017/11/15 04:28:45 nat Exp $ */
/*-
* Copyright (c) 2016 Nathanial Sloss <nathanialsloss%yahoo.com.au@localhost>
@@ -148,7 +148,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.437 2017/11/15 02:13:33 nat Exp $");
+__KERNEL_RCSID(0, "$NetBSD: audio.c,v 1.438 2017/11/15 04:28:45 nat Exp $");
#ifdef _KERNEL_OPT
#include "audio.h"
@@ -294,9 +294,6 @@
void audio_clear(struct audio_softc *, struct virtual_channel *);
void audio_clear_intr_unlocked(struct audio_softc *sc,
struct virtual_channel *);
-static inline void
- audio_pint_silence(struct audio_softc *, struct audio_ringbuffer *,
- uint8_t *, int, struct virtual_channel *);
int audio_alloc_ring(struct audio_softc *, struct audio_ringbuffer *, int,
size_t);
void audio_free_ring(struct audio_softc *, struct audio_ringbuffer *);
@@ -2086,7 +2083,6 @@
((vc->sc_open & AUOPEN_WRITE) || vc == sc->sc_hwvc)) {
audio_init_ringbuffer(sc, &vc->sc_mpr,
AUMODE_PLAY);
- vc->sc_sil_count = 0;
if (sc->sc_opens == 0 && (vc->sc_open & AUOPEN_WRITE)) {
if (hw->init_output) {
error = hw->init_output(sc->hw_hdl,
@@ -2181,7 +2177,6 @@
if (sc->sc_usemixer) {
vc->sc_open = 0;
vc->sc_mode = 0;
- vc->sc_sil_count = 0;
vc->sc_nrfilters = 0;
memset(vc->sc_rfilters, 0,
sizeof(vc->sc_rfilters));
@@ -3020,12 +3015,6 @@
einp = cb->s.inp;
/*
- * This is a very suboptimal way of keeping track of
- * silence in the buffer, but it is simple.
- */
- vc->sc_sil_count = 0;
-
- /*
* If the interrupt routine wants the last block filled AND
* the copy did not fill the last block completely it needs to
* be padded.
@@ -3623,60 +3612,6 @@
return error;
}
-/*
- * When the play interrupt routine finds that the write isn't keeping
- * the buffer filled it will insert silence in the buffer to make up
- * for this. The part of the buffer that is filled with silence
- * is kept track of in a very approximate way: it starts at sc_sil_start
- * and extends sc_sil_count bytes. If there is already silence in
- * the requested area nothing is done; so when the whole buffer is
- * silent nothing happens. When the writer starts again sc_sil_count
- * is set to 0.
- *
- * XXX
- * Putting silence into the output buffer should not really be done
- * from the device interrupt handler. Consider deferring to the soft
- * interrupt.
- */
-static inline void
-audio_pint_silence(struct audio_softc *sc, struct audio_ringbuffer *cb,
- uint8_t *inp, int cc, struct virtual_channel *vc)
-{
- uint8_t *s, *e, *p, *q;
-
- KASSERT(mutex_owned(sc->sc_lock));
-
- if (vc->sc_sil_count > 0) {
- s = vc->sc_sil_start; /* start of silence */
- e = s + vc->sc_sil_count; /* end of sil., may be beyond end */
- p = inp; /* adjusted pointer to area to fill */
- if (p < s)
- p += cb->s.end - cb->s.start;
- q = p + cc;
- /* Check if there is already silence. */
- if (!(s <= p && p < e &&
- s <= q && q <= e)) {
- if (s <= p)
- vc->sc_sil_count = max(vc->sc_sil_count, q-s);
- DPRINTFN(5,("audio_pint_silence: fill cc=%d inp=%p, "
- "count=%d size=%d\n",
- cc, inp, vc->sc_sil_count,
- (int)(cb->s.end - cb->s.start)));
- audio_fill_silence(&cb->s.param, inp, cc);
- } else {
- DPRINTFN(5,("audio_pint_silence: already silent "
- "cc=%d inp=%p\n", cc, inp));
-
- }
- } else {
- vc->sc_sil_start = inp;
- vc->sc_sil_count = cc;
- DPRINTFN(5, ("audio_pint_silence: start fill %p %d\n",
- inp, cc));
- audio_fill_silence(&cb->s.param, inp, cc);
- }
-}
-
static void
audio_softintr_rd(void *cookie)
{
@@ -3899,15 +3834,15 @@
vc->sc_playdrop += cc;
}
- audio_pint_silence(sc, cb, inp, cc, vc);
+ audio_fill_silence(&cb->s.param, inp, cc);
cb->s.inp = audio_stream_add_inp(&cb->s, inp,
cc);
/* Clear next block to keep ahead of the DMA. */
used = audio_stream_get_used(&cb->s);
if (used + blksize < cb->s.end - cb->s.start) {
- audio_pint_silence(sc, cb, cb->s.inp,
- blksize, vc);
+ audio_fill_silence(&cb->s.param, cb->s.inp,
+ blksize);
}
}
}
diff -r 4638834c740a -r db862559c040 sys/dev/audiovar.h
--- a/sys/dev/audiovar.h Wed Nov 15 04:08:02 2017 +0000
+++ b/sys/dev/audiovar.h Wed Nov 15 04:28:45 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: audiovar.h,v 1.67 2017/11/07 01:13:19 nat Exp $ */
+/* $NetBSD: audiovar.h,v 1.68 2017/11/15 04:28:45 nat Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
@@ -126,7 +126,6 @@
u_char sc_mode; /* bitmask for RECORD/PLAY */
uint8_t *sc_sil_start; /* start of silence in buffer */
- int sc_sil_count; /* # of silence bytes */
bool sc_pbus; /* output DMA in progress */
audio_params_t sc_pparams; /* play encoding parameters */
audio_stream_t *sc_pustream; /* the first buffer */
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