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channel.c
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/*
Copyright (C) 2009 - 2010
Artem Makhutov <[email protected]>
http://www.makhutov.org
Dmitry Vagin <[email protected]>
bg <[email protected]>
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /* HAVE_CONFIG_H */
#include <asterisk.h>
#include <asterisk/dsp.h> /* ast_dsp_digitreset() */
#include <asterisk/pbx.h> /* pbx_builtin_setvar_helper() */
#include <asterisk/module.h> /* ast_module_ref() ast_module_info = shit */
#include <asterisk/causes.h> /* AST_CAUSE_INCOMPATIBLE_DESTINATION AST_CAUSE_FACILITY_NOT_IMPLEMENTED AST_CAUSE_REQUESTED_CHAN_UNAVAIL */
#include <asterisk/musiconhold.h> /* ast_moh_start() ast_moh_stop() */
#include <asterisk/lock.h> /* AST_MUTEX_DEFINE_STATIC */
#include <asterisk/timing.h> /* ast_timer_fd() ast_timer_set_rate() ast_timer_ack() */
#include <asterisk/version.h> /* ASTERISK_VERSION_NUM */
#include "channel.h"
#include "chan_dongle.h"
#include "at_command.h"
#include "helpers.h" /* get_at_clir_value() */
#include "at_queue.h" /* write_all() TODO: move out */
#include "manager.h" /* manager_event_call_state_change() */
static char silence_frame[FRAME_SIZE];
#/* */
static int parse_dial_string(char * dialstr, const char** number, int * opts)
{
char* options;
char* dest_num;
int lopts = 0;
options = strchr (dialstr, '/');
if (!options)
{
ast_log (LOG_WARNING, "Can't determine destination in chan_dongle\n");
return AST_CAUSE_INCOMPATIBLE_DESTINATION;
}
*options++ = '\0';
dest_num = strchr(options, ':');
if(!dest_num)
{
dest_num = options;
}
else
{
*dest_num++ = '\0';
if (!strcasecmp(options, "holdother"))
lopts = CALL_FLAG_HOLD_OTHER;
else if (!strcasecmp(options, "conference"))
lopts = CALL_FLAG_HOLD_OTHER | CALL_FLAG_CONFERENCE;
else
{
ast_log (LOG_WARNING, "Invalid options in chan_dongle\n");
return AST_CAUSE_INCOMPATIBLE_DESTINATION;
}
}
if (*dest_num == '\0')
{
ast_log (LOG_WARNING, "Empty destination in chan_dongle\n");
return AST_CAUSE_INCOMPATIBLE_DESTINATION;
}
if (!is_valid_phone_number(dest_num))
{
ast_log (LOG_WARNING, "Invalid destination '%s' in chan_dongle, only 0123456789*#+ABC allowed\n", dest_num);
return AST_CAUSE_INCOMPATIBLE_DESTINATION;
}
*number = dest_num;
*opts = lopts;
return 0;
}
#/* */
EXPORT_DEF int channels_loop(struct pvt * pvt, const struct ast_channel * requestor)
{
/* not allow hold requester channel :) */
/* FIXME: requestor may be just proxy/masquerade for real channel */
// use ast_bridged_channel(chan) ?
// use requestor->tech->get_base_channel() ?
if(requestor && requestor->tech == &channel_tech && requestor->tech_pvt && ((struct cpvt*)requestor->tech_pvt)->pvt == pvt)
return 1;
return 0;
}
#if ASTERISK_VERSION_NUM >= 10800
// TODO: simplify by move common code to functions
static struct ast_channel * channel_request (attribute_unused const char * type, format_t format, const struct ast_channel * requestor, void * data, int * cause)
#else /* #if ASTERISK_VERSION_NUM >= 10800 */
/* TODO: add check when request 'holdother' what requestor is not on same device for 1.6 */
static struct ast_channel * channel_request (attribute_unused const char * type, int format, void * data, int * cause)
#endif /* #if ASTERISK_VERSION_NUM >= 10800 */
{
#if ASTERISK_VERSION_NUM >= 10800
format_t oldformat;
#else
int oldformat;
const struct ast_channel * requestor = NULL;
#endif
char * dest_dev;
const char * dest_num;
struct ast_channel * channel = NULL;
struct pvt * pvt;
int opts = CALL_FLAG_NONE;
int exists;
if (!data)
{
ast_log (LOG_WARNING, "Channel requested with no data\n");
*cause = AST_CAUSE_INCOMPATIBLE_DESTINATION;
return NULL;
}
oldformat = format;
format &= AST_FORMAT_SLINEAR;
if (!format)
{
#if ASTERISK_VERSION_NUM >= 10800
ast_log (LOG_WARNING, "Asked to get a channel of unsupported format '%s'\n", ast_getformatname (oldformat));
#else
ast_log (LOG_WARNING, "Asked to get a channel of unsupported format '%d'\n", oldformat);
#endif
*cause = AST_CAUSE_FACILITY_NOT_IMPLEMENTED;
return NULL;
}
dest_dev = ast_strdupa (data);
*cause = parse_dial_string(dest_dev, &dest_num, &opts);
if(*cause)
return NULL;
#if ASTERISK_VERSION_NUM >= 10800
pvt = find_device_by_resource(dest_dev, opts, requestor, &exists);
#else
pvt = find_device_by_resource(dest_dev, opts, NULL, &exists);
#endif
if(pvt)
{
channel = new_channel (pvt, AST_STATE_DOWN, NULL, pvt_get_pseudo_call_idx(pvt), CALL_DIR_OUTGOING, CALL_STATE_INIT, NULL, requestor);
ast_mutex_unlock (&pvt->lock);
if(!channel)
{
ast_log (LOG_WARNING, "Unable to allocate channel structure\n");
*cause = AST_CAUSE_REQUESTED_CHAN_UNAVAIL;
}
}
else
{
ast_log (LOG_WARNING, "[%s] Request to call on device %s\n", dest_dev, exists ? "which can not make call at this moment" : "not exists");
*cause = AST_CAUSE_REQUESTED_CHAN_UNAVAIL;
}
return channel;
}
#/* */
static int channel_call (struct ast_channel* channel, char* dest, attribute_unused int timeout)
{
struct cpvt* cpvt = channel->tech_pvt;
struct pvt* pvt;
char* dest_dev;
const char* dest_num;
int clir = 0;
int opts;
if(!cpvt || cpvt->channel != channel || !cpvt->pvt)
{
ast_log (LOG_WARNING, "call on unreferenced %s\n", channel->name);
return -1;
}
pvt = cpvt->pvt;
dest_dev = ast_strdupa (dest);
if(parse_dial_string(dest_dev, &dest_num, &opts))
return -1;
if ((channel->_state != AST_STATE_DOWN) && (channel->_state != AST_STATE_RESERVED))
{
ast_log (LOG_WARNING, "channel_call called on %s, neither down nor reserved\n", channel->name);
return -1;
}
ast_mutex_lock (&pvt->lock);
// FIXME: check if bridged on same device with CALL_FLAG_HOLD_OTHER
if (!ready4voice_call(pvt, cpvt, opts))
{
ast_mutex_unlock (&pvt->lock);
ast_log (LOG_ERROR, "[%s] Error device already in use or uninitialized\n", PVT_ID(pvt));
return -1;
}
CPVT_SET_FLAGS(cpvt, opts);
ast_debug (1, "[%s] Calling %s on %s\n", PVT_ID(pvt), dest, channel->name);
if (CONF_SHARED(pvt, usecallingpres))
{
if (CONF_SHARED(pvt, callingpres) < 0)
{
#if ASTERISK_VERSION_NUM >= 10800
clir = channel->connected.id.number.presentation;
#else
clir = channel->cid.cid_pres;
#endif
}
else
{
clir = CONF_SHARED(pvt, callingpres);
}
clir = get_at_clir_value (pvt, clir);
}
else
{
clir = -1;
}
PVT_STAT(pvt, out_calls) ++;
if (at_enque_dial (cpvt, dest_num, clir))
{
ast_mutex_unlock (&pvt->lock);
ast_log (LOG_ERROR, "[%s] Error sending ATD command\n", PVT_ID(pvt));
return -1;
}
ast_mutex_unlock (&pvt->lock);
return 0;
}
#/* ARCH: move to cpvt level */
static void disactivate_call(struct cpvt* cpvt)
{
if(cpvt->channel && CPVT_TEST_FLAG(cpvt, CALL_FLAG_ACTIVATED))
{
mixb_detach(&cpvt->pvt->a_write_mixb, &cpvt->mixstream);
ast_channel_set_fd (cpvt->channel, 1, -1);
ast_channel_set_fd (cpvt->channel, 0, -1);
CPVT_RESET_FLAGS(cpvt, CALL_FLAG_ACTIVATED | CALL_FLAG_MASTER);
ast_debug (6, "[%s] call idx %d disactivated\n", PVT_ID(cpvt->pvt), cpvt->call_idx);
}
}
#/* ARCH: move to cpvt level */
static void activate_call(struct cpvt* cpvt)
{
struct cpvt* cpvt2;
struct pvt* pvt;
/* nothing todo, already main */
if(CPVT_TEST_FLAG(cpvt, CALL_FLAG_MASTER))
return;
/* drop any other from MASTER, any set pipe for actives */
pvt = cpvt->pvt;
AST_LIST_TRAVERSE(&pvt->chans, cpvt2, entry)
{
if(cpvt2 != cpvt)
{
if(CPVT_TEST_FLAG(cpvt, CALL_FLAG_MASTER))
{
ast_debug (6, "[%s] call idx %d gave master\n", PVT_ID(pvt), cpvt2->call_idx);
}
CPVT_RESET_FLAGS(cpvt2, CALL_FLAG_MASTER);
if(cpvt2->channel)
{
ast_channel_set_fd (cpvt2->channel, 1, -1);
if(CPVT_TEST_FLAG(cpvt, CALL_FLAG_ACTIVATED))
{
ast_channel_set_fd (cpvt2->channel, 0, cpvt2->rd_pipe[PIPE_READ]);
ast_debug (6, "[%s] call idx %d still active fd %d\n", PVT_ID(pvt), cpvt2->call_idx, cpvt2->rd_pipe[PIPE_READ]);
}
}
}
}
/* setup call local write possition */
if(!CPVT_TEST_FLAG(cpvt, CALL_FLAG_ACTIVATED))
{
// FIXME: reset possition?
mixb_attach(&pvt->a_write_mixb, &cpvt->mixstream);
// rb_init (&cpvt->a_write_rb, cpvt->a_write_buf, sizeof (cpvt->a_write_buf));
// cpvt->write = pvt->a_write_rb.write;
// cpvt->used = pvt->a_write_rb.used;
}
if (pvt->audio_fd >= 0)
{
CPVT_SET_FLAGS(cpvt, CALL_FLAG_ACTIVATED | CALL_FLAG_MASTER);
if(cpvt->channel)
{
ast_channel_set_fd (cpvt->channel, 0, pvt->audio_fd);
if (pvt->a_timer)
{
ast_channel_set_fd (cpvt->channel, 1, ast_timer_fd (pvt->a_timer));
ast_timer_set_rate (pvt->a_timer, 50);
/* ast_debug (3, "[%s] Timer set\n", PVT_ID(pvt));
*/
}
}
if(pvt->dsp)
ast_dsp_digitreset(pvt->dsp);
pvt->dtmf_digit = 0;
ast_debug (6, "[%s] call idx %d was master\n", PVT_ID(pvt), cpvt->call_idx);
}
}
#/* we has 2 case of call this function, when local side want terminate call and when called for cleanup after remote side alreay terminate call, CEND received and cpvt destroyed */
static int channel_hangup (struct ast_channel* channel)
{
struct cpvt* cpvt = channel->tech_pvt;
struct pvt* pvt;
/* its possible call with channel w/o tech_pvt */
if(cpvt && cpvt->channel == channel && cpvt->pvt)
{
pvt = cpvt->pvt;
ast_mutex_lock (&pvt->lock);
ast_debug (1, "[%s] Hanging up call idx %d need hangup %d\n", PVT_ID(pvt), cpvt->call_idx, CPVT_TEST_FLAG(cpvt, CALL_FLAG_NEED_HANGUP) ? 1 : 0);
if (CPVT_TEST_FLAG(cpvt, CALL_FLAG_NEED_HANGUP))
{
if (at_enque_hangup (cpvt, cpvt->call_idx))
ast_log (LOG_ERROR, "[%s] Error adding AT+CHUP command to queue, call not terminated!\n", PVT_ID(pvt));
else
CPVT_RESET_FLAGS(cpvt, CALL_FLAG_NEED_HANGUP);
}
disactivate_call (cpvt);
/* drop cpvt->channel reference */
cpvt->channel = NULL;
ast_mutex_unlock (&pvt->lock);
}
/* drop channel -> cpvt reference */
channel->tech_pvt = NULL;
ast_module_unref (self_module());
ast_setstate (channel, AST_STATE_DOWN);
return 0;
}
#/* */
static int channel_answer (struct ast_channel* channel)
{
struct cpvt* cpvt = channel->tech_pvt;
struct pvt* pvt;
if(!cpvt || cpvt->channel != channel || !cpvt->pvt)
{
ast_log (LOG_WARNING, "call on unreferenced %s\n", channel->name);
return 0;
}
pvt = cpvt->pvt;
ast_mutex_lock (&pvt->lock);
if (cpvt->dir == CALL_DIR_INCOMING)
{
if (at_enque_answer (cpvt))
{
ast_log (LOG_ERROR, "[%s] Error sending answer commands\n", PVT_ID(pvt));
}
}
ast_mutex_unlock (&pvt->lock);
return 0;
}
#/* */
static int channel_digit_begin (struct ast_channel* channel, char digit)
{
struct cpvt* cpvt = channel->tech_pvt;
struct pvt* pvt;
int rv;
if(!cpvt || cpvt->channel != channel || !cpvt->pvt)
{
ast_log (LOG_WARNING, "call on unreferenced %s\n", channel->name);
return -1;
}
pvt = cpvt->pvt;
ast_mutex_lock (&pvt->lock);
rv = at_enque_dtmf (cpvt, digit);
if (rv)
{
ast_mutex_unlock (&pvt->lock);
if(rv == -1974)
ast_log (LOG_WARNING, "[%s] Sending DTMF %c not supported by dongle. Tell Asterisk to generate inband\n", PVT_ID(pvt), digit);
else
ast_log (LOG_ERROR, "[%s] Error adding DTMF %c command to queue\n", PVT_ID(pvt), digit);
return -1;
}
ast_mutex_unlock (&pvt->lock);
ast_debug (3, "[%s] Send DTMF %c\n", PVT_ID(pvt), digit);
return 0;
}
#/* */
static int channel_digit_end (attribute_unused struct ast_channel* channel, attribute_unused char digit, attribute_unused unsigned int duration)
{
return 0;
}
#/* ARCH: move to cpvt level */
static void iov_write(struct pvt* pvt, int fd, struct iovec * iov, int iovcnt)
{
ssize_t written;
ssize_t done = 0;
int count = 10;
while(iovcnt)
{
again:
written = writev (fd, iov, iovcnt);
if(written < 0)
{
if((errno == EINTR || errno == EAGAIN))
{
--count;
if(count != 0)
goto again;
ast_debug (1, "[%s] Deadlock avoided for write!\n", PVT_ID(pvt));
}
break;
}
else
{
done += written;
count = 10;
do
{
if((size_t)written >= iov->iov_len)
{
written -= iov->iov_len;
iovcnt--;
iov++;
}
else
{
iov->iov_len -= written;
goto again;
}
} while(written > 0);
}
}
PVT_STAT(pvt, a_write_bytes) += done;
if (done != FRAME_SIZE)
{
ast_debug (1, "[%s] Write error!\n", PVT_ID(pvt));
}
}
#/* */
static void timing_write (struct pvt* pvt)
{
size_t used;
int iovcnt;
struct iovec iov[3];
const char* msg = NULL;
// char buffer[FRAME_SIZE];
// struct cpvt* cpvt;
// ast_debug (6, "[%s] tm write |\n", PVT_ID(pvt));
// memset(buffer, 0, sizeof(buffer));
// AST_LIST_TRAVERSE(&pvt->chans, cpvt, entry) {
// if(!CPVT_IS_ACTIVE(cpvt))
// continue;
used = mixb_used (&pvt->a_write_mixb);
// used = rb_used (&cpvt->a_write_rb);
if (used >= FRAME_SIZE)
{
iovcnt = mixb_read_n_iov (&pvt->a_write_mixb, iov, FRAME_SIZE);
mixb_read_n_iov (&pvt->a_write_mixb, iov, FRAME_SIZE);
mixb_read_upd (&pvt->a_write_mixb, FRAME_SIZE);
}
else if (used > 0)
{
PVT_STAT(pvt, write_tframes) ++;
msg = "[%s] write truncated frame\n";
iovcnt = mixb_read_all_iov (&pvt->a_write_mixb, iov);
mixb_read_all_iov (&pvt->a_write_mixb, iov);
mixb_read_upd (&pvt->a_write_mixb, used);
iov[iovcnt].iov_base = silence_frame;
iov[iovcnt].iov_len = FRAME_SIZE - used;
iovcnt++;
}
else
{
PVT_STAT(pvt, write_sframes) ++;
msg = "[%s] write silence\n";
iov[0].iov_base = silence_frame;
iov[0].iov_len = FRAME_SIZE;
iovcnt = 1;
// continue;
}
// iov_add(buffer, sizeof(buffer), iov);
if(msg)
ast_debug (7, msg, PVT_ID(pvt));
// }
PVT_STAT(pvt, write_frames) ++;
iov_write(pvt, pvt->audio_fd, iov, iovcnt);
// if(write_all(pvt->audio_fd, buffer, sizeof(buffer)) != sizeof(buffer))
// ast_debug (1, "[%s] Write error!\n", PVT_ID(pvt));
}
#/* copy voice data from device to each channel in conference */
static void write_conference(struct pvt * pvt, const char * buffer, size_t length)
{
struct cpvt* cpvt;
size_t wr;
AST_LIST_TRAVERSE(&pvt->chans, cpvt, entry) {
if(CPVT_IS_ACTIVE(cpvt) && !CPVT_IS_MASTER(cpvt) && CPVT_TEST_FLAG(cpvt, CALL_FLAG_MULTIPARTY) && cpvt->rd_pipe[PIPE_WRITE] >= 0)
{
wr = write_all(cpvt->rd_pipe[PIPE_WRITE], buffer, length);
// ast_debug (6, "[%s] write2 | call idx %d pipe fd %d wrote %d bytes\n", PVT_ID(pvt), cpvt->call_idx, cpvt->rd_pipe[PIPE_WRITE], wr);
if(wr != length)
{
ast_debug (1, "[%s] Pipe write error %d\n", PVT_ID(pvt), errno);
}
}
}
}
#if ASTERISK_VERSION_NUM >= 10800
#define subclass_codec subclass.codec
#define subclass_integer subclass.integer
#else
#define subclass_codec subclass
#define subclass_integer subclass
#endif
#/* */
static struct ast_frame* channel_read (struct ast_channel* channel)
{
struct cpvt* cpvt = channel->tech_pvt;
struct pvt* pvt;
struct ast_frame* f = &ast_null_frame;
ssize_t res;
if(!cpvt || cpvt->channel != channel || !cpvt->pvt)
{
return f;
}
pvt = cpvt->pvt;
while (ast_mutex_trylock (&pvt->lock))
{
CHANNEL_DEADLOCK_AVOIDANCE (channel);
}
ast_debug (7, "[%s] read call idx %d state %d audio_fd %d\n", PVT_ID(pvt), cpvt->call_idx, cpvt->state, pvt->audio_fd);
/* FIXME: move down for enable timing_write() to device ? */
if (!CPVT_IS_SOUND_SOURCE(cpvt) || pvt->audio_fd < 0)
{
goto e_return;
}
if (pvt->a_timer && channel->fdno == 1)
{
ast_timer_ack (pvt->a_timer, 1);
timing_write (pvt);
ast_debug (7, "[%s] *** timing ***\n", PVT_ID(pvt));
}
else
{
memset (&cpvt->a_read_frame, 0, sizeof (cpvt->a_read_frame));
cpvt->a_read_frame.frametype = AST_FRAME_VOICE;
cpvt->a_read_frame.subclass_codec= AST_FORMAT_SLINEAR;
cpvt->a_read_frame.data.ptr = cpvt->a_read_buf + AST_FRIENDLY_OFFSET;
cpvt->a_read_frame.offset = AST_FRIENDLY_OFFSET;
cpvt->a_read_frame.src = AST_MODULE;
res = read (CPVT_IS_MASTER(cpvt) ? pvt->audio_fd : cpvt->rd_pipe[PIPE_READ], cpvt->a_read_frame.data.ptr, FRAME_SIZE);
if (res <= 0)
{
if (errno != EAGAIN && errno != EINTR)
{
ast_debug (1, "[%s] Read error %d, going to wait for new connection\n", PVT_ID(pvt), errno);
}
goto e_return;
}
/* ast_debug (7, "[%s] call idx %d read %u\n", PVT_ID(pvt), cpvt->call_idx, (unsigned)res);
ast_debug (6, "[%s] read | call idx %d fd %d readed %d bytes\n", PVT_ID(pvt), cpvt->call_idx, pvt->audio_fd, res);
*/
if(CPVT_IS_MASTER(cpvt))
{
if(CPVT_TEST_FLAG(cpvt, CALL_FLAG_MULTIPARTY))
write_conference(pvt, cpvt->a_read_frame.data.ptr, res);
PVT_STAT(pvt, a_read_bytes) += res;
PVT_STAT(pvt, read_frames) ++;
if(res < FRAME_SIZE)
PVT_STAT(pvt, read_sframes) ++;
}
cpvt->a_read_frame.samples = res / 2;
cpvt->a_read_frame.datalen = res;
ast_frame_byteswap_le (&cpvt->a_read_frame);
/*
cpvt->a_read_frame.ts;
cpvt->a_read_frame.len;
cpvt->a_read_frame.seqno;
*/
f = &cpvt->a_read_frame;
if (pvt->dsp)
{
f = ast_dsp_process (channel, pvt->dsp, f);
if ((f->frametype == AST_FRAME_DTMF_END) || (f->frametype == AST_FRAME_DTMF_BEGIN))
{
if ((f->subclass_integer == 'm') || (f->subclass_integer == 'u'))
{
f->frametype = AST_FRAME_NULL;
f->subclass_integer = 0;
goto e_return;
}
if(f->frametype == AST_FRAME_DTMF_BEGIN)
{
pvt->dtmf_begin_time = ast_tvnow();
}
else if (f->frametype == AST_FRAME_DTMF_END)
{
if(!ast_tvzero(pvt->dtmf_begin_time) && ast_tvdiff_ms(ast_tvnow(), pvt->dtmf_begin_time) < CONF_SHARED(pvt, mindtmfgap))
{
ast_debug(1, "[%s] DTMF char %c ignored min gap %d > %ld\n", PVT_ID(pvt), f->subclass_integer, CONF_SHARED(pvt, mindtmfgap), (long)ast_tvdiff_ms(ast_tvnow(), pvt->dtmf_begin_time));
f->frametype = AST_FRAME_NULL;
f->subclass_integer = 0;
}
else if(f->len < CONF_SHARED(pvt, mindtmfduration))
{
ast_debug(1, "[%s] DTMF char %c ignored min duration %d > %ld\n", PVT_ID(pvt), f->subclass_integer, CONF_SHARED(pvt, mindtmfduration), f->len);
f->frametype = AST_FRAME_NULL;
f->subclass_integer = 0;
}
else if(f->subclass_integer == pvt->dtmf_digit
&&
!ast_tvzero(pvt->dtmf_end_time)
&&
ast_tvdiff_ms(ast_tvnow(), pvt->dtmf_end_time) < CONF_SHARED(pvt, mindtmfinterval))
{
ast_debug(1, "[%s] DTMF char %c ignored min interval %d > %ld\n", PVT_ID(pvt), f->subclass_integer, CONF_SHARED(pvt, mindtmfinterval), (long)ast_tvdiff_ms(ast_tvnow(), pvt->dtmf_end_time));
f->frametype = AST_FRAME_NULL;
f->subclass_integer = 0;
}
else
{
ast_debug(1, "[%s] Got DTMF char %c\n",PVT_ID(pvt), f->subclass_integer);
pvt->dtmf_digit = f->subclass_integer;
pvt->dtmf_end_time = ast_tvnow();
}
}
goto e_return;
}
}
if (CONF_SHARED(pvt, rxgain) && f->frametype == AST_FRAME_VOICE)
{
if (ast_frame_adjust_volume (f, CONF_SHARED(pvt, rxgain)) == -1)
{
ast_debug (1, "[%s] Volume could not be adjusted!\n", PVT_ID(pvt));
}
}
}
e_return:
ast_mutex_unlock (&pvt->lock);
return f;
}
#/* */
static int channel_write (struct ast_channel* channel, struct ast_frame* f)
{
struct cpvt* cpvt = channel->tech_pvt;
struct pvt* pvt;
size_t count;
int gains[2];
if (f->frametype != AST_FRAME_VOICE || f->subclass_codec != AST_FORMAT_SLINEAR)
{
return 0;
}
if(!cpvt || cpvt->channel != channel || !cpvt->pvt)
{
ast_log (LOG_WARNING, "call on unreferenced %s\n", channel->name);
return 0;
}
/* TODO: write silence better ? */
/* TODO: check end of bridge loop condition */
/* never write to same device from other channel its possible for call hold or conference */
if(CPVT_TEST_FLAG(cpvt, CALL_FLAG_BRIDGE_LOOP))
return 0;
pvt = cpvt->pvt;
ast_debug (7, "[%s] write call idx %d state %d\n", PVT_ID(pvt), cpvt->call_idx, cpvt->state);
while (ast_mutex_trylock (&pvt->lock))
{
CHANNEL_DEADLOCK_AVOIDANCE (channel);
}
if(!CPVT_IS_ACTIVE(cpvt))
goto e_return;
if(CPVT_TEST_FLAG(cpvt, CALL_FLAG_MULTIPARTY) && !CPVT_TEST_FLAG(cpvt, CALL_FLAG_BRIDGE_CHECK))
{
struct ast_channel* bridged = ast_bridged_channel(channel);
CPVT_SET_FLAGS(cpvt, CALL_FLAG_BRIDGE_CHECK);
if(bridged && bridged->tech == &channel_tech && bridged->tech_pvt && ((struct cpvt*)bridged->tech_pvt)->pvt == pvt)
{
CPVT_SET_FLAGS(cpvt, CALL_FLAG_BRIDGE_LOOP);
CPVT_SET_FLAGS((struct cpvt*)bridged->tech_pvt, CALL_FLAG_BRIDGE_LOOP);
ast_log (LOG_WARNING, "[%s] Bridged channels %s and %s working on same device, discard writes to avoid voice loop\n", PVT_ID(pvt), channel->name, bridged->name);
goto e_return;
}
}
if (pvt->audio_fd < 0)
{
ast_debug (1, "[%s] audio_fd not ready\n", PVT_ID(pvt));
}
else
{
if(f->datalen)
{
/** try to minimize of ast_frame_adjust_volume() calls:
* one hand we must obey txgain but with other divide gain to
* number of mixed channels. In some cases one call of ast_frame_adjust_volume() enough
*/
gains[1] = mixb_streams(&pvt->a_write_mixb);
if(gains[1] < 1 || pvt->a_timer == NULL)
gains[1] = 1;
gains[0] = CONF_SHARED(pvt, txgain);
if(gains[0] <= -2)
{
gains[0] *= gains[1];
gains[1] = 0;
}
else if(gains[0] <= 1)
{
gains[0] = - gains[1];
gains[1] = 0;
}
else if(gains[0] % gains[1] == 0)
{
gains[0] /= gains[1];
gains[1] = 0;
}
for(count = 0; count < ITEMS_OF(gains); ++count)
{
if(gains[count] > 1 || gains[count] < -1)
if(ast_frame_adjust_volume (f, gains[count]) == -1)
{
ast_debug (1, "[%s] Volume could not be adjusted!\n", PVT_ID(pvt));
}
}
}
if (pvt->a_timer)
{
count = mixb_free (&pvt->a_write_mixb, &cpvt->mixstream);
if (count < (size_t) f->datalen)
{
mixb_read_upd (&pvt->a_write_mixb, f->datalen - count);
PVT_STAT(pvt, write_rb_overflow_bytes) += f->datalen - count;
PVT_STAT(pvt, write_rb_overflow) ++;
}
mixb_write (&pvt->a_write_mixb, &cpvt->mixstream, f->data.ptr, f->datalen);
/*
ast_debug (6, "[%s] write | call idx %d, %d bytes lwrite %d lused %d write %d used %d\n", PVT_ID(pvt), cpvt->call_idx, f->datalen, cpvt->write, cpvt->used, pvt->a_write_rb.write, pvt->a_write_rb.used);
rb_tetris(&pvt->a_write_rb, f->data.ptr, f->datalen, &cpvt->write, &cpvt->used);
ast_debug (6, "[%s] write | lwrite %d lused %d write %d used %d\n", PVT_ID(pvt), cpvt->write, cpvt->used, pvt->a_write_rb.write, pvt->a_write_rb.used);
*/
}
else
{
if(mixb_streams(&pvt->a_write_mixb) != 1)
{
ast_log (LOG_ERROR, "[%s] write conference without timer\n", PVT_ID(pvt));
goto e_return;
}
{
int iovcnt;
struct iovec iov[2];
ast_frame_byteswap_le (f);
iov[0].iov_base = f->data.ptr;
iov[0].iov_len = FRAME_SIZE;
if (f->datalen < FRAME_SIZE)
{
iov[0].iov_len = f->datalen;
iov[1].iov_base = silence_frame;
iov[1].iov_len = FRAME_SIZE - f->datalen;
iovcnt = 2;
PVT_STAT(pvt, write_tframes) ++;
}
else
{
iovcnt = 1;
}
iov_write(pvt, pvt->audio_fd, iov, iovcnt);
PVT_STAT(pvt, write_frames) ++;
}
}
/* if (f->datalen != 320)
*/
{
ast_debug (7, "[%s] Write frame: samples = %d, data lenght = %d byte\n", PVT_ID(pvt), f->samples, f->datalen);
}
}
e_return:
ast_mutex_unlock (&pvt->lock);
return 0;
}
#undef subclass_integer
#undef subclass_codec
#/* */
static int channel_fixup (struct ast_channel* oldchannel, struct ast_channel* newchannel)
{
struct cpvt * cpvt = newchannel->tech_pvt;
struct pvt* pvt;
if (!cpvt || !cpvt->pvt)
{
ast_log (LOG_WARNING, "call on unreferenced %s\n", newchannel->name);
return -1;
}
pvt = cpvt->pvt;
ast_mutex_lock (&pvt->lock);
if (cpvt->channel == oldchannel)
{
cpvt->channel = newchannel;
}
ast_mutex_unlock (&pvt->lock);
return 0;
}
#/* FIXME: must modify in conjuction with state on call not whole device? */
static int channel_devicestate (void* data)
{
char* device;
struct pvt* pvt;
int res = AST_DEVICE_INVALID;
device = ast_strdupa (data ? data : "");
ast_debug (1, "Checking device state for device %s\n", device);
pvt = find_device_ext (device, NULL);
if (pvt)
{
if (pvt->connected)
{
if (is_dial_possible(pvt, CALL_FLAG_NONE))
{
res = AST_DEVICE_NOT_INUSE;
}
else
{
res = AST_DEVICE_INUSE;
}
}
ast_mutex_unlock (&pvt->lock);
}
return res;
}
#/* */
static int channel_indicate (struct ast_channel* channel, int condition, const void* data, attribute_unused size_t datalen)
{
int res = 0;
ast_debug (1, "[%s] Requested indication %d\n", channel->name, condition);
switch (condition)
{
case AST_CONTROL_BUSY:
case AST_CONTROL_CONGESTION:
case AST_CONTROL_RINGING:
case -1:
res = -1;
break;
/* appears in r295843 */
#ifdef HAVE_AST_CONTROL_SRCCHANGE
case AST_CONTROL_SRCCHANGE:
#endif
case AST_CONTROL_PROGRESS:
case AST_CONTROL_PROCEEDING:
case AST_CONTROL_VIDUPDATE:
case AST_CONTROL_SRCUPDATE:
break;
case AST_CONTROL_HOLD:
ast_moh_start (channel, data, NULL);
break;
case AST_CONTROL_UNHOLD:
ast_moh_stop (channel);
break;
default:
ast_log (LOG_WARNING, "[%s] Don't know how to indicate condition %d\n", channel->name, condition);
res = -1;
break;
}
return res;
}
/* ARCH: move to cpvt */
/* FIXME: protection for cpvt->channel if exists */
#/* NOTE: called from device level with locked pvt */
EXPORT_DEF void change_channel_state(struct cpvt * cpvt, unsigned newstate, int cause)
{
struct ast_channel * channel;
struct pvt* pvt;
call_state_t oldstate = cpvt->state;
short call_idx;