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got mmap oss output working

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@20 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2004-06-16 00:05:30 +00:00
parent a8f788111c
commit 4b86ff0e6c
17 changed files with 607 additions and 112 deletions
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48
src/memblockq.c
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@ -1,3 +1,5 @@
#include <sys/time.h>
#include <time.h>
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
@ -7,18 +9,17 @@
struct memblock_list {
struct memblock_list *next;
struct memchunk chunk;
struct timeval stamp;
};
struct memblockq {
struct memblock_list *blocks, *blocks_tail;
unsigned n_blocks;
size_t total_length;
size_t maxlength;
size_t base;
size_t prebuf;
size_t total_length, maxlength, base, prebuf;
int measure_latency;
uint32_t latency;
};
struct memblockq* memblockq_new(size_t maxlength, size_t base, size_t prebuf) {
struct memblockq* bq;
assert(maxlength && base);
@ -37,6 +38,9 @@ struct memblockq* memblockq_new(size_t maxlength, size_t base, size_t prebuf) {
assert(bq->maxlength >= base);
bq->measure_latency = 1;
bq->latency = 0;
return bq;
}
@ -60,6 +64,11 @@ void memblockq_push(struct memblockq* bq, struct memchunk *chunk, size_t delta)
q = malloc(sizeof(struct memblock_list));
assert(q);
if (bq->measure_latency)
gettimeofday(&q->stamp, NULL);
else
timerclear(&q->stamp);
q->chunk = *chunk;
memblock_ref(q->chunk.memblock);
assert(q->chunk.index+q->chunk.length <= q->chunk.memblock->length);
@ -113,6 +122,26 @@ int memblockq_pop(struct memblockq* bq, struct memchunk *chunk) {
return 0;
}
static uint32_t age(struct timeval *tv) {
assert(tv);
struct timeval now;
uint32_t r;
if (tv->tv_sec == 0)
return 0;
gettimeofday(&now, NULL);
r = (now.tv_sec-tv->tv_sec) * 1000000;
if (now.tv_usec >= tv->tv_usec)
r += now.tv_usec - tv->tv_usec;
else
r -= tv->tv_usec - now.tv_usec;
return r;
}
void memblockq_drop(struct memblockq *bq, size_t length) {
assert(bq);
@ -122,7 +151,10 @@ void memblockq_drop(struct memblockq *bq, size_t length) {
if (l > bq->blocks->chunk.length)
l = bq->blocks->chunk.length;
if (bq->measure_latency)
bq->latency = age(&bq->blocks->stamp);
bq->blocks->chunk.index += l;
bq->blocks->chunk.length -= l;
bq->total_length -= l;
@ -178,3 +210,7 @@ int memblockq_is_writable(struct memblockq *bq, size_t length) {
assert(length <= bq->maxlength);
return bq->total_length + length <= bq->maxlength;
}
uint32_t memblockq_get_latency(struct memblockq *bq) {
return bq->latency;
}