aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/isdn/mISDN/dsp_cmx.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/isdn/mISDN/dsp_cmx.c')
-rw-r--r--drivers/isdn/mISDN/dsp_cmx.c146
1 files changed, 91 insertions, 55 deletions
diff --git a/drivers/isdn/mISDN/dsp_cmx.c b/drivers/isdn/mISDN/dsp_cmx.c
index c884511e2d49..0ac67bff303a 100644
--- a/drivers/isdn/mISDN/dsp_cmx.c
+++ b/drivers/isdn/mISDN/dsp_cmx.c
@@ -137,6 +137,7 @@
/* #define CMX_CONF_DEBUG */
/*#define CMX_DEBUG * massive read/write pointer output */
+/*#define CMX_DELAY_DEBUG * gives rx-buffer delay overview */
/*#define CMX_TX_DEBUG * massive read/write on tx-buffer with content */
static inline int
@@ -744,11 +745,11 @@ conf_software:
if (dsp->pcm_slot_rx >= 0 &&
dsp->pcm_slot_rx <
sizeof(freeslots))
- freeslots[dsp->pcm_slot_tx] = 0;
+ freeslots[dsp->pcm_slot_rx] = 0;
if (dsp->pcm_slot_tx >= 0 &&
dsp->pcm_slot_tx <
sizeof(freeslots))
- freeslots[dsp->pcm_slot_rx] = 0;
+ freeslots[dsp->pcm_slot_tx] = 0;
}
}
i = 0;
@@ -836,11 +837,11 @@ conf_software:
if (dsp->pcm_slot_rx >= 0 &&
dsp->pcm_slot_rx <
sizeof(freeslots))
- freeslots[dsp->pcm_slot_tx] = 0;
+ freeslots[dsp->pcm_slot_rx] = 0;
if (dsp->pcm_slot_tx >= 0 &&
dsp->pcm_slot_tx <
sizeof(freeslots))
- freeslots[dsp->pcm_slot_rx] = 0;
+ freeslots[dsp->pcm_slot_tx] = 0;
}
}
i1 = 0;
@@ -926,10 +927,6 @@ conf_software:
/* for more than two members.. */
- /* in case of hdlc, we change to software */
- if (dsp->hdlc)
- goto conf_software;
-
/* if all members already have the same conference */
if (all_conf)
return;
@@ -940,6 +937,9 @@ conf_software:
if (current_conf >= 0) {
join_members:
list_for_each_entry(member, &conf->mlist, list) {
+ /* in case of hdlc, change to software */
+ if (member->dsp->hdlc)
+ goto conf_software;
/* join to current conference */
if (member->dsp->hfc_conf == current_conf)
continue;
@@ -1135,6 +1135,25 @@ dsp_cmx_conf(struct dsp *dsp, u32 conf_id)
return 0;
}
+#ifdef CMX_DELAY_DEBUG
+int delaycount;
+static void
+showdelay(struct dsp *dsp, int samples, int delay)
+{
+ char bar[] = "--------------------------------------------------|";
+ int sdelay;
+
+ delaycount += samples;
+ if (delaycount < 8000)
+ return;
+ delaycount = 0;
+
+ sdelay = delay * 50 / (dsp_poll << 2);
+
+ printk(KERN_DEBUG "DELAY (%s) %3d >%s\n", dsp->name, delay,
+ sdelay > 50 ? "..." : bar + 50 - sdelay);
+}
+#endif
/*
* audio data is received from card
@@ -1168,11 +1187,18 @@ dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb)
dsp->rx_init = 0;
if (dsp->features.unordered) {
dsp->rx_R = (hh->id & CMX_BUFF_MASK);
- dsp->rx_W = (dsp->rx_R + dsp->cmx_delay)
- & CMX_BUFF_MASK;
+ if (dsp->cmx_delay)
+ dsp->rx_W = (dsp->rx_R + dsp->cmx_delay)
+ & CMX_BUFF_MASK;
+ else
+ dsp->rx_W = (dsp->rx_R + (dsp_poll >> 1))
+ & CMX_BUFF_MASK;
} else {
dsp->rx_R = 0;
- dsp->rx_W = dsp->cmx_delay;
+ if (dsp->cmx_delay)
+ dsp->rx_W = dsp->cmx_delay;
+ else
+ dsp->rx_W = dsp_poll >> 1;
}
}
/* if frame contains time code, write directly */
@@ -1185,19 +1211,25 @@ dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb)
* we set our new read pointer, and write silence to buffer
*/
if (((dsp->rx_W-dsp->rx_R) & CMX_BUFF_MASK) >= CMX_BUFF_HALF) {
- if (dsp_debug & DEBUG_DSP_CMX)
+ if (dsp_debug & DEBUG_DSP_CLOCK)
printk(KERN_DEBUG
"cmx_receive(dsp=%lx): UNDERRUN (or overrun the "
"maximum delay), adjusting read pointer! "
"(inst %s)\n", (u_long)dsp, dsp->name);
- /* flush buffer */
+ /* flush rx buffer and set delay to dsp_poll / 2 */
if (dsp->features.unordered) {
dsp->rx_R = (hh->id & CMX_BUFF_MASK);
- dsp->rx_W = (dsp->rx_R + dsp->cmx_delay)
- & CMX_BUFF_MASK;
+ if (dsp->cmx_delay)
+ dsp->rx_W = (dsp->rx_R + dsp->cmx_delay)
+ & CMX_BUFF_MASK;
+ dsp->rx_W = (dsp->rx_R + (dsp_poll >> 1))
+ & CMX_BUFF_MASK;
} else {
dsp->rx_R = 0;
- dsp->rx_W = dsp->cmx_delay;
+ if (dsp->cmx_delay)
+ dsp->rx_W = dsp->cmx_delay;
+ else
+ dsp->rx_W = dsp_poll >> 1;
}
memset(dsp->rx_buff, dsp_silence, sizeof(dsp->rx_buff));
}
@@ -1205,7 +1237,7 @@ dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb)
if (dsp->cmx_delay)
if (((dsp->rx_W - dsp->rx_R) & CMX_BUFF_MASK) >=
(dsp->cmx_delay << 1)) {
- if (dsp_debug & DEBUG_DSP_CMX)
+ if (dsp_debug & DEBUG_DSP_CLOCK)
printk(KERN_DEBUG
"cmx_receive(dsp=%lx): OVERRUN (because "
"twice the delay is reached), adjusting "
@@ -1243,6 +1275,9 @@ dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb)
/* increase write-pointer */
dsp->rx_W = ((dsp->rx_W+len) & CMX_BUFF_MASK);
+#ifdef CMX_DELAY_DEBUG
+ showdelay(dsp, len, (dsp->rx_W-dsp->rx_R) & CMX_BUFF_MASK);
+#endif
}
@@ -1360,8 +1395,12 @@ dsp_cmx_send_member(struct dsp *dsp, int len, s32 *c, int members)
t = (t+1) & CMX_BUFF_MASK;
r = (r+1) & CMX_BUFF_MASK;
}
- if (r != rr)
+ if (r != rr) {
+ if (dsp_debug & DEBUG_DSP_CLOCK)
+ printk(KERN_DEBUG "%s: RX empty\n",
+ __func__);
memset(d, dsp_silence, (rr-r)&CMX_BUFF_MASK);
+ }
/* -> if echo is enabled */
} else {
/*
@@ -1540,13 +1579,11 @@ send_packet:
schedule_work(&dsp->workq);
}
-static u32 samplecount;
+static u32 jittercount; /* counter for jitter check */;
struct timer_list dsp_spl_tl;
u32 dsp_spl_jiffies; /* calculate the next time to fire */
-#ifdef UNUSED
-static u32 dsp_start_jiffies; /* jiffies at the time, the calculation begins */
-#endif /* UNUSED */
-static struct timeval dsp_start_tv; /* time at start of calculation */
+static u16 dsp_count; /* last sample count */
+static int dsp_count_valid ; /* if we have last sample count */
void
dsp_cmx_send(void *arg)
@@ -1560,38 +1597,32 @@ dsp_cmx_send(void *arg)
int r, rr;
int jittercheck = 0, delay, i;
u_long flags;
- struct timeval tv;
- u32 elapsed;
- s16 length;
+ u16 length, count;
/* lock */
spin_lock_irqsave(&dsp_lock, flags);
- if (!dsp_start_tv.tv_sec) {
- do_gettimeofday(&dsp_start_tv);
+ if (!dsp_count_valid) {
+ dsp_count = mISDN_clock_get();
length = dsp_poll;
+ dsp_count_valid = 1;
} else {
- do_gettimeofday(&tv);
- elapsed = ((tv.tv_sec - dsp_start_tv.tv_sec) * 8000)
- + ((s32)(tv.tv_usec / 125) - (dsp_start_tv.tv_usec / 125));
- dsp_start_tv.tv_sec = tv.tv_sec;
- dsp_start_tv.tv_usec = tv.tv_usec;
- length = elapsed;
+ count = mISDN_clock_get();
+ length = count - dsp_count;
+ dsp_count = count;
}
if (length > MAX_POLL + 100)
length = MAX_POLL + 100;
-/* printk(KERN_DEBUG "len=%d dsp_count=0x%x.%04x dsp_poll_diff=0x%x.%04x\n",
- length, dsp_count >> 16, dsp_count & 0xffff, dsp_poll_diff >> 16,
- dsp_poll_diff & 0xffff);
- */
+ /* printk(KERN_DEBUG "len=%d dsp_count=0x%x\n", length, dsp_count); */
/*
- * check if jitter needs to be checked
- * (this is about every second = 8192 samples)
+ * check if jitter needs to be checked (this is every second)
*/
- samplecount += length;
- if ((samplecount & 8191) < length)
+ jittercount += length;
+ if (jittercount >= 8000) {
+ jittercount -= 8000;
jittercheck = 1;
+ }
/* loop all members that do not require conference mixing */
list_for_each_entry(dsp, &dsp_ilist, list) {
@@ -1704,17 +1735,19 @@ dsp_cmx_send(void *arg)
}
/*
* remove rx_delay only if we have delay AND we
- * have not preset cmx_delay
+ * have not preset cmx_delay AND
+ * the delay is greater dsp_poll
*/
- if (delay && !dsp->cmx_delay) {
- if (dsp_debug & DEBUG_DSP_CMX)
+ if (delay > dsp_poll && !dsp->cmx_delay) {
+ if (dsp_debug & DEBUG_DSP_CLOCK)
printk(KERN_DEBUG
"%s lowest rx_delay of %d bytes for"
" dsp %s are now removed.\n",
__func__, delay,
dsp->name);
r = dsp->rx_R;
- rr = (r + delay) & CMX_BUFF_MASK;
+ rr = (r + delay - (dsp_poll >> 1))
+ & CMX_BUFF_MASK;
/* delete rx-data */
while (r != rr) {
p[r] = dsp_silence;
@@ -1736,15 +1769,16 @@ dsp_cmx_send(void *arg)
* remove delay only if we have delay AND we
* have enabled tx_dejitter
*/
- if (delay && dsp->tx_dejitter) {
- if (dsp_debug & DEBUG_DSP_CMX)
+ if (delay > dsp_poll && dsp->tx_dejitter) {
+ if (dsp_debug & DEBUG_DSP_CLOCK)
printk(KERN_DEBUG
"%s lowest tx_delay of %d bytes for"
" dsp %s are now removed.\n",
__func__, delay,
dsp->name);
r = dsp->tx_R;
- rr = (r + delay) & CMX_BUFF_MASK;
+ rr = (r + delay - (dsp_poll >> 1))
+ & CMX_BUFF_MASK;
/* delete tx-data */
while (r != rr) {
q[r] = dsp_silence;
@@ -1797,14 +1831,16 @@ dsp_cmx_transmit(struct dsp *dsp, struct sk_buff *skb)
ww = dsp->tx_R;
p = dsp->tx_buff;
d = skb->data;
- space = ww-w;
- if (space <= 0)
- space += CMX_BUFF_SIZE;
+ space = (ww - w - 1) & CMX_BUFF_MASK;
/* write-pointer should not overrun nor reach read pointer */
- if (space-1 < skb->len)
+ if (space < skb->len) {
/* write to the space we have left */
- ww = (ww - 1) & CMX_BUFF_MASK;
- else
+ ww = (ww - 1) & CMX_BUFF_MASK; /* end one byte prior tx_R */
+ if (dsp_debug & DEBUG_DSP_CLOCK)
+ printk(KERN_DEBUG "%s: TX overflow space=%d skb->len="
+ "%d, w=0x%04x, ww=0x%04x\n", __func__, space,
+ skb->len, w, ww);
+ } else
/* write until all byte are copied */
ww = (w + skb->len) & CMX_BUFF_MASK;
dsp->tx_W = ww;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.