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srsLTE
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Added read_block function to ringbuffer

This commit is contained in:
Ismael Gomez 2019-06-03 21:39:24 +02:00
parent 19cb5c172b
commit 594d62f229
2 changed files with 29 additions and 0 deletions
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2
lib/include/srslte/phy/utils/ringbuffer.h
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@ -60,6 +60,8 @@ SRSLTE_API int srslte_ringbuffer_read_timed(srslte_ringbuffer_t* q, void* p, int
SRSLTE_API int srslte_ringbuffer_read_convert_conj(srslte_ringbuffer_t* q, cf_t* dst_ptr, float norm, int nof_samples);
SRSLTE_API int srslte_ringbuffer_read_block(srslte_ringbuffer_t* q, void** p, int nof_bytes);
SRSLTE_API void srslte_ringbuffer_stop(srslte_ringbuffer_t *q);
#ifdef __cplusplus

27
lib/src/phy/utils/ringbuffer.c
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@ -221,3 +221,30 @@ int srslte_ringbuffer_read_convert_conj(srslte_ringbuffer_t* q, cf_t* dst_ptr, f
pthread_mutex_unlock(&q->mutex);
return nof_samples;
}
/* For this function, the ring buffer capacity must be multiple of block size */
int srslte_ringbuffer_read_block(srslte_ringbuffer_t* q, void** p, int nof_bytes)
{
int ret = nof_bytes;
pthread_mutex_lock(&q->mutex);
/* Wait until enough data is in the buffer */
while (q->count < nof_bytes && q->active) {
pthread_cond_wait(&q->cvar, &q->mutex);
}
if (!q->active) {
ret = 0;
} else {
*p = &q->buffer[q->rpm];
q->count -= nof_bytes;
q->rpm += nof_bytes;
if (q->rpm >= q->capacity) {
q->rpm -= q->capacity;
}
}
pthread_mutex_unlock(&q->mutex);
return ret;
}