[mISDN PATCH v2 08/19] Hardware acceleration is now possible in conjunction with audio recording
From: Karsten Keil
Date: Fri May 22 2009 - 17:06:56 EST
From: Andreas Eversberg <andreas@xxxxxxxxxxxx>
Audio recording requires software audio processing.
Both hardware and software processing is simultaniously possible now.
Signed-off-by: Andreas Eversberg <andreas@xxxxxxxxxxxx>
Signed-off-by: Karsten Keil <keil@xxxxxxxxxxxxx>
---
drivers/isdn/mISDN/dsp.h | 11 ++++-
drivers/isdn/mISDN/dsp_cmx.c | 101 ++++++++++++++++++++++++++---------------
drivers/isdn/mISDN/dsp_core.c | 17 ++++---
3 files changed, 84 insertions(+), 45 deletions(-)
diff --git a/drivers/isdn/mISDN/dsp.h b/drivers/isdn/mISDN/dsp.h
index 41c6cfd..564ea3e 100644
--- a/drivers/isdn/mISDN/dsp.h
+++ b/drivers/isdn/mISDN/dsp.h
@@ -151,6 +151,15 @@ struct dsp_tone {
struct timer_list tl;
};
+/***************
+ * echo stuff *
+ ***************/
+
+struct dsp_echo {
+ int software; /* echo is generated by software */
+ int hardware; /* echo is generated by hardware */
+};
+
/*****************
* general stuff *
*****************/
@@ -161,7 +170,7 @@ struct dsp {
struct mISDNchannel *up;
unsigned char name[64];
int b_active;
- int echo; /* echo is enabled */
+ struct dsp_echo echo;
int rx_disabled; /* what the user wants */
int rx_is_off; /* what the card is */
int tx_mix;
diff --git a/drivers/isdn/mISDN/dsp_cmx.c b/drivers/isdn/mISDN/dsp_cmx.c
index ac84146..d19b4f6 100644
--- a/drivers/isdn/mISDN/dsp_cmx.c
+++ b/drivers/isdn/mISDN/dsp_cmx.c
@@ -163,8 +163,9 @@ dsp_cmx_debug(struct dsp *dsp)
printk(KERN_DEBUG "-----Current DSP\n");
list_for_each_entry(odsp, &dsp_ilist, list) {
- printk(KERN_DEBUG "* %s echo=%d txmix=%d",
- odsp->name, odsp->echo, odsp->tx_mix);
+ printk(KERN_DEBUG "* %s hardecho=%d softecho=%d txmix=%d",
+ odsp->name, odsp->echo.hardware, odsp->echo.software,
+ odsp->tx_mix);
if (odsp->conf)
printk(" (Conf %d)", odsp->conf->id);
if (dsp == odsp)
@@ -177,10 +178,12 @@ dsp_cmx_debug(struct dsp *dsp)
list_for_each_entry(member, &conf->mlist, list) {
printk(KERN_DEBUG
" - member = %s (slot_tx %d, bank_tx %d, "
- "slot_rx %d, bank_rx %d hfc_conf %d)%s\n",
+ "slot_rx %d, bank_rx %d hfc_conf %d "
+ "tx_data %d rx_is_off %d)%s\n",
member->dsp->name, member->dsp->pcm_slot_tx,
member->dsp->pcm_bank_tx, member->dsp->pcm_slot_rx,
member->dsp->pcm_bank_rx, member->dsp->hfc_conf,
+ member->dsp->tx_data, member->dsp->rx_is_off,
(member->dsp == dsp) ? " *this*" : "");
}
}
@@ -385,7 +388,7 @@ dsp_cmx_hardware(struct dsp_conf *conf, struct dsp *dsp)
int freeunits[8];
u_char freeslots[256];
int same_hfc = -1, same_pcm = -1, current_conf = -1,
- all_conf = 1;
+ all_conf = 1, tx_data = 0;
/* dsp gets updated (no conf) */
if (!conf) {
@@ -409,7 +412,7 @@ one_member:
/* process hw echo */
if (dsp->features.pcm_banks < 1)
return;
- if (!dsp->echo) {
+ if (!dsp->echo.software && !dsp->echo.hardware) {
/* NO ECHO: remove PCM slot if assigned */
if (dsp->pcm_slot_tx >= 0 || dsp->pcm_slot_rx >= 0) {
if (dsp_debug & DEBUG_DSP_CMX)
@@ -427,10 +430,15 @@ one_member:
}
return;
}
+ /* echo is enabled, find out if we use soft or hardware */
+ dsp->echo.software = dsp->tx_data;
+ dsp->echo.hardware = 0;
/* ECHO: already echo */
if (dsp->pcm_slot_tx >= 0 && dsp->pcm_slot_rx < 0 &&
- dsp->pcm_bank_tx == 2 && dsp->pcm_bank_rx == 2)
+ dsp->pcm_bank_tx == 2 && dsp->pcm_bank_rx == 2) {
+ dsp->echo.hardware = 1;
return;
+ }
/* ECHO: if slot already assigned */
if (dsp->pcm_slot_tx >= 0) {
dsp->pcm_slot_rx = dsp->pcm_slot_tx;
@@ -443,6 +451,7 @@ one_member:
dsp->pcm_slot_tx);
dsp_cmx_hw_message(dsp, MISDN_CTRL_HFC_PCM_CONN,
dsp->pcm_slot_tx, 2, dsp->pcm_slot_rx, 2);
+ dsp->echo.hardware = 1;
return;
}
/* ECHO: find slot */
@@ -472,6 +481,7 @@ one_member:
"%s no slot available for echo\n",
__func__);
/* no more slots available */
+ dsp->echo.software = 1;
return;
}
/* assign free slot */
@@ -485,6 +495,7 @@ one_member:
__func__, dsp->name, dsp->pcm_slot_tx);
dsp_cmx_hw_message(dsp, MISDN_CTRL_HFC_PCM_CONN,
dsp->pcm_slot_tx, 2, dsp->pcm_slot_rx, 2);
+ dsp->echo.hardware = 1;
return;
}
@@ -554,7 +565,7 @@ conf_software:
return;
}
/* check if member has echo turned on */
- if (member->dsp->echo) {
+ if (member->dsp->echo.hardware || member->dsp->echo.software) {
if (dsp_debug & DEBUG_DSP_CMX)
printk(KERN_DEBUG
"%s dsp %s cannot form a conf, because "
@@ -592,10 +603,9 @@ conf_software:
if (member->dsp->tx_data) {
if (dsp_debug & DEBUG_DSP_CMX)
printk(KERN_DEBUG
- "%s dsp %s cannot form a conf, because "
- "tx_data is turned on\n",
+ "%s dsp %s tx_data is turned on\n",
__func__, member->dsp->name);
- goto conf_software;
+ tx_data = 1;
}
/* check if pipeline exists */
if (member->dsp->pipeline.inuse) {
@@ -794,7 +804,7 @@ conf_software:
nextm->dsp->pcm_slot_tx, nextm->dsp->pcm_bank_tx,
nextm->dsp->pcm_slot_rx, nextm->dsp->pcm_bank_rx);
conf->hardware = 1;
- conf->software = 0;
+ conf->software = tx_data;
return;
/* if members have one bank (or on the same chip) */
} else {
@@ -904,7 +914,7 @@ conf_software:
nextm->dsp->pcm_slot_tx, nextm->dsp->pcm_bank_tx,
nextm->dsp->pcm_slot_rx, nextm->dsp->pcm_bank_rx);
conf->hardware = 1;
- conf->software = 0;
+ conf->software = tx_data;
return;
}
}
@@ -1295,17 +1305,25 @@ dsp_cmx_send_member(struct dsp *dsp, int len, s32 *c, int members)
int r, rr, t, tt, o_r, o_rr;
int preload = 0;
struct mISDNhead *hh, *thh;
+ int tx_data_only = 0;
/* don't process if: */
if (!dsp->b_active) { /* if not active */
dsp->last_tx = 0;
return;
}
- if (dsp->pcm_slot_tx >= 0 && /* connected to pcm slot */
+ if (((dsp->conf && dsp->conf->hardware) || /* hardware conf */
+ dsp->echo.hardware) && /* OR hardware echo */
dsp->tx_R == dsp->tx_W && /* AND no tx-data */
!(dsp->tone.tone && dsp->tone.software)) { /* AND not soft tones */
- dsp->last_tx = 0;
- return;
+ if (!dsp->tx_data) { /* no tx_data for user space required */
+ dsp->last_tx = 0;
+ return;
+ }
+ if (dsp->conf && dsp->conf->software && dsp->conf->hardware)
+ tx_data_only = 1;
+ if (dsp->conf->software && dsp->echo.hardware)
+ tx_data_only = 1;
}
#ifdef CMX_DEBUG
@@ -1388,7 +1406,7 @@ dsp_cmx_send_member(struct dsp *dsp, int len, s32 *c, int members)
/* PROCESS DATA (one member / no conf) */
if (!conf || members <= 1) {
/* -> if echo is NOT enabled */
- if (!dsp->echo) {
+ if (!dsp->echo.software) {
/* -> send tx-data if available or use 0-volume */
while (r != rr && t != tt) {
*d++ = p[t]; /* write tx_buff */
@@ -1438,7 +1456,7 @@ dsp_cmx_send_member(struct dsp *dsp, int len, s32 *c, int members)
o_r = (o_rr - rr + r) & CMX_BUFF_MASK;
/* start rx-pointer at current read position*/
/* -> if echo is NOT enabled */
- if (!dsp->echo) {
+ if (!dsp->echo.software) {
/*
* -> copy other member's rx-data,
* if tx-data is available, mix
@@ -1486,7 +1504,7 @@ dsp_cmx_send_member(struct dsp *dsp, int len, s32 *c, int members)
#endif
/* PROCESS DATA (three or more members) */
/* -> if echo is NOT enabled */
- if (!dsp->echo) {
+ if (!dsp->echo.software) {
/*
* -> substract rx-data from conf-data,
* if tx-data is available, mix
@@ -1550,27 +1568,40 @@ send_packet:
* becuase we want what we send, not what we filtered
*/
if (dsp->tx_data) {
- /* PREPARE RESULT */
- txskb = mI_alloc_skb(len, GFP_ATOMIC);
- if (!txskb) {
- printk(KERN_ERR
- "FATAL ERROR in mISDN_dsp.o: "
- "cannot alloc %d bytes\n", len);
+ if (tx_data_only) {
+ hh->prim = DL_DATA_REQ;
+ hh->id = 0;
+ /* queue and trigger */
+ skb_queue_tail(&dsp->sendq, nskb);
+ schedule_work(&dsp->workq);
+ /* exit because only tx_data is used */
+ return;
} else {
- thh = mISDN_HEAD_P(txskb);
- thh->prim = DL_DATA_REQ;
- thh->id = 0;
- memcpy(skb_put(txskb, len), nskb->data+preload, len);
- /* queue (trigger later) */
- skb_queue_tail(&dsp->sendq, txskb);
+ txskb = mI_alloc_skb(len, GFP_ATOMIC);
+ if (!txskb) {
+ printk(KERN_ERR
+ "FATAL ERROR in mISDN_dsp.o: "
+ "cannot alloc %d bytes\n", len);
+ } else {
+ thh = mISDN_HEAD_P(txskb);
+ thh->prim = DL_DATA_REQ;
+ thh->id = 0;
+ memcpy(skb_put(txskb, len), nskb->data+preload,
+ len);
+ /* queue (trigger later) */
+ skb_queue_tail(&dsp->sendq, txskb);
+ }
}
}
+
+ /* send data only to card, if we don't just calculated tx_data */
/* adjust volume */
if (dsp->tx_volume)
dsp_change_volume(nskb, dsp->tx_volume);
/* pipeline */
if (dsp->pipeline.inuse)
- dsp_pipeline_process_tx(&dsp->pipeline, nskb->data, nskb->len);
+ dsp_pipeline_process_tx(&dsp->pipeline, nskb->data,
+ nskb->len);
/* crypt */
if (dsp->bf_enable)
dsp_bf_encrypt(dsp, nskb->data, nskb->len);
@@ -1891,10 +1922,8 @@ dsp_cmx_hdlc(struct dsp *dsp, struct sk_buff *skb)
/* no conf */
if (!dsp->conf) {
- /* in case of hardware (echo) */
- if (dsp->pcm_slot_tx >= 0)
- return;
- if (dsp->echo) {
+ /* in case of software echo */
+ if (dsp->echo.software) {
nskb = skb_clone(skb, GFP_ATOMIC);
if (nskb) {
hh = mISDN_HEAD_P(nskb);
@@ -1910,7 +1939,7 @@ dsp_cmx_hdlc(struct dsp *dsp, struct sk_buff *skb)
if (dsp->conf->hardware)
return;
list_for_each_entry(member, &dsp->conf->mlist, list) {
- if (dsp->echo || member->dsp != dsp) {
+ if (dsp->echo.software || member->dsp != dsp) {
nskb = skb_clone(skb, GFP_ATOMIC);
if (nskb) {
hh = mISDN_HEAD_P(nskb);
diff --git a/drivers/isdn/mISDN/dsp_core.c b/drivers/isdn/mISDN/dsp_core.c
index 6b49398..a0e0af8 100644
--- a/drivers/isdn/mISDN/dsp_core.c
+++ b/drivers/isdn/mISDN/dsp_core.c
@@ -203,13 +203,13 @@ dsp_rx_off_member(struct dsp *dsp)
else if (dsp->dtmf.software)
rx_off = 0;
/* echo in software */
- else if (dsp->echo && dsp->pcm_slot_tx < 0)
+ else if (dsp->echo.software)
rx_off = 0;
/* bridge in software */
- else if (dsp->conf) {
- if (dsp->conf->software)
- rx_off = 0;
- }
+ else if (dsp->conf && dsp->conf->software)
+ rx_off = 0;
+ /* data is not required by user space and not required
+ * for echo dtmf detection, soft-echo, soft-bridging */
if (rx_off == dsp->rx_is_off)
return;
@@ -415,7 +415,7 @@ tone_off:
dsp_rx_off(dsp);
break;
case DSP_ECHO_ON: /* enable echo */
- dsp->echo = 1; /* soft echo */
+ dsp->echo.software = 1; /* soft echo */
if (dsp_debug & DEBUG_DSP_CORE)
printk(KERN_DEBUG "%s: enable cmx-echo\n", __func__);
dsp_cmx_hardware(dsp->conf, dsp);
@@ -424,7 +424,8 @@ tone_off:
dsp_cmx_debug(dsp);
break;
case DSP_ECHO_OFF: /* disable echo */
- dsp->echo = 0;
+ dsp->echo.software = 0;
+ dsp->echo.hardware = 0;
if (dsp_debug & DEBUG_DSP_CORE)
printk(KERN_DEBUG "%s: disable cmx-echo\n", __func__);
dsp_cmx_hardware(dsp->conf, dsp);
@@ -722,7 +723,7 @@ dsp_function(struct mISDNchannel *ch, struct sk_buff *skb)
skb->len, (dsp_options&DSP_OPT_ULAW)?1:0);
}
/* we need to process receive data if software */
- if (dsp->pcm_slot_tx < 0 && dsp->pcm_slot_rx < 0) {
+ if (dsp->conf && dsp->conf->software) {
/* process data from card at cmx */
dsp_cmx_receive(dsp, skb);
}
--
1.6.0.2
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