We use host_pos_blks to store the latest read pointer, and report *host_pos to host side, here rename host_pos_blks to host_pos_read to make it understandable.
Signed-off-by: Keyon Jie yang.jie@linux.intel.com --- src/audio/host.c | 38 +++++++++++++++++++------------------- 1 file changed, 19 insertions(+), 19 deletions(-)
diff --git a/src/audio/host.c b/src/audio/host.c index 3aba934..ed4af37 100644 --- a/src/audio/host.c +++ b/src/audio/host.c @@ -69,8 +69,8 @@ struct host_data { struct hc_buf host; struct hc_buf local; uint32_t host_size; - volatile uint32_t *host_pos; /* points to mailbox */ - uint32_t host_pos_blks; /* position in bytes (nearest block) */ + volatile uint32_t *host_pos; /* read pos, update to mailbox for host side */ + uint32_t host_pos_read; /* host buffer read pos in bytes */ uint32_t host_period_bytes; /* host period size in bytes */ uint32_t host_period_pos; /* position in current host perid */ uint32_t host_app_pos; /* host buffer app write pos, points to mailbox */ @@ -89,24 +89,24 @@ struct host_data {
static inline void host_update_buffer_produce(struct host_data *hd) { - if (hd->host_pos_blks < hd->host_app_pos) - hd->host_avail = hd->host_app_pos - hd->host_pos_blks; - else if (hd->host_pos_blks == hd->host_app_pos) + if (hd->host_pos_read < hd->host_app_pos) + hd->host_avail = hd->host_app_pos - hd->host_pos_read; + else if (hd->host_pos_read == hd->host_app_pos) hd->host_avail = hd->host_size; /* full */ else - hd->host_avail = hd->host_size -hd->host_pos_blks + + hd->host_avail = hd->host_size -hd->host_pos_read + hd->host_app_pos; hd->host_free = hd->host_size - hd->host_avail; }
static inline void host_update_buffer_consume(struct host_data *hd) { - if (hd->host_pos_blks < hd->host_app_pos) - hd->host_avail = hd->host_app_pos - hd->host_pos_blks; - else if (hd->host_pos_blks == hd->host_app_pos) + if (hd->host_pos_read < hd->host_app_pos) + hd->host_avail = hd->host_app_pos - hd->host_pos_read; + else if (hd->host_pos_read == hd->host_app_pos) hd->host_avail = 0; /* empty */ else - hd->host_avail = hd->host_size -hd->host_pos_blks + + hd->host_avail = hd->host_size -hd->host_pos_read + hd->host_app_pos; hd->host_free = hd->host_size - hd->host_avail; } @@ -161,13 +161,13 @@ static void host_dma_cb_playback(struct comp_dev *dev, comp_update_buffer_consume(hd->dma_buffer);
/* new local period, update host buffer position blks */ - hd->host_pos_blks += local_elem->size; + hd->host_pos_read += local_elem->size;
/* buffer overlap ? */ - if (hd->host_pos_blks >= hd->host_size) - hd->host_pos_blks = 0; + if (hd->host_pos_read >= hd->host_size) + hd->host_pos_read = 0; if (hd->host_pos) - *hd->host_pos = hd->host_pos_blks; + *hd->host_pos = hd->host_pos_read; host_update_buffer_consume(hd);
/* send IPC message to driver if needed */ @@ -250,13 +250,13 @@ static void host_dma_cb_capture(struct comp_dev *dev, #endif
/* new local period, update host buffer position blks */ - hd->host_pos_blks += local_elem->size; + hd->host_pos_read += local_elem->size;
/* buffer overlap ? */ - if (hd->host_pos_blks >= hd->host_size) - hd->host_pos_blks = 0; + if (hd->host_pos_read >= hd->host_size) + hd->host_pos_read = 0; if (hd->host_pos) - *hd->host_pos = hd->host_pos_blks; + *hd->host_pos = hd->host_pos_read;
/* recalc available buffer space */ comp_update_buffer_produce(hd->dma_buffer); @@ -559,7 +559,7 @@ static int host_prepare(struct comp_dev *dev)
if (hd->host_pos) *hd->host_pos = 0; - hd->host_pos_blks = 0; + hd->host_pos_read = 0; hd->host_period_pos = 0; hd->host_period_bytes = hd->params.period_frames * hd->params.frame_size;