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buffer: don't use ringbuffer in chunk

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We can't use a ringbuffer on the chunk because it implies the
consumer would write to it to update the read position, which we
can't do because the chunk is read-only and might even be shared.
Go back to offset/size pairs, which can sortof do the same thing
if we want later when we keep a non-shared read pointer in the
consumer.
Keep alsa timestamp around and filled state for future.
mmap the input port meta/data/chunk as read-only.
Only do clock update requests when asked.
This commit is contained in:
Wim Taymans 2017-11-21 12:30:15 +01:00
parent 2ad722b579
commit 4288a634f4
25 changed files with 165 additions and 126 deletions
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5
spa/plugins/alsa/alsa-utils.h
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@ -32,7 +32,6 @@ extern "C" {
#include <spa/support/loop.h>
#include <spa/support/log.h>
#include <spa/utils/list.h>
#include <spa/utils/ringbuffer.h>
#include <spa/clock/clock.h>
#include <spa/node/node.h>
@ -150,13 +149,17 @@ struct state {
struct spa_list free;
struct spa_list ready;
size_t ready_offset;
bool started;
struct spa_source source;
int timerfd;
bool alsa_started;
int threshold;
snd_htimestamp_t now;
int64_t sample_count;
int64_t filled;
int64_t last_ticks;
int64_t last_monotonic;