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Improve T.38 negotiation by exchanging session parameters between application and channel.

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@203699 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Joshua Colp
2009-06-26 19:27:24 +00:00
parent 5ebf0f3c50
commit 59c1998d67
7 changed files with 286 additions and 113 deletions
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46
apps/app_fax.c
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@@ -161,7 +161,7 @@ typedef struct {
int direction; /* Fax direction: 0 - receiving, 1 - sending */
int caller_mode;
char *file_name;
struct ast_control_t38_parameters t38parameters;
volatile int finished;
} fax_session;
@@ -372,7 +372,6 @@ static int transmit_audio(fax_session *s)
struct ast_frame *fr;
int last_state = 0;
struct timeval now, start, state_change;
enum ast_control_t38 t38control;
#if SPANDSP_RELEASE_DATE >= 20080725
/* for spandsp shaphots 0.0.6 and higher */
@@ -456,9 +455,16 @@ static int transmit_audio(fax_session *s)
/* Do not pass channel to ast_dsp_process otherwise it may queue modified audio frame back */
fr = ast_dsp_process(NULL, dsp, fr);
if (fr && fr->frametype == AST_FRAME_DTMF && fr->subclass == 'f') {
struct ast_control_t38_parameters parameters = { .request_response = AST_T38_REQUEST_NEGOTIATE,
.version = 0,
.max_datagram = 400,
.rate = AST_T38_RATE_9600,
.rate_management = AST_T38_RATE_MANAGEMENT_TRANSFERED_TCF,
.fill_bit_removal = 1,
.transcoding_mmr = 1,
};
ast_debug(1, "Fax tone detected. Requesting T38\n");
t38control = AST_T38_REQUEST_NEGOTIATE;
ast_indicate_data(s->chan, AST_CONTROL_T38, &t38control, sizeof(t38control));
ast_indicate_data(s->chan, AST_CONTROL_T38_PARAMETERS, &parameters, sizeof(parameters));
detect_tone = 0;
}
@@ -483,11 +489,11 @@ static int transmit_audio(fax_session *s)
state_change = ast_tvnow();
last_state = t30state->state;
}
} else if (inf->frametype == AST_FRAME_CONTROL && inf->subclass == AST_CONTROL_T38 &&
inf->datalen == sizeof(enum ast_control_t38)) {
t38control =*((enum ast_control_t38 *) inf->data.ptr);
if (t38control == AST_T38_NEGOTIATED) {
} else if (inf->frametype == AST_FRAME_CONTROL && inf->subclass == AST_CONTROL_T38_PARAMETERS) {
struct ast_control_t38_parameters *parameters = inf->data.ptr;
if (parameters->request_response == AST_T38_NEGOTIATED) {
/* T38 switchover completed */
s->t38parameters = *parameters;
ast_debug(1, "T38 negotiated, finishing audio loop\n");
res = 1;
break;
@@ -548,8 +554,6 @@ static int transmit_t38(fax_session *s)
struct ast_frame *inf = NULL;
int last_state = 0;
struct timeval now, start, state_change, last_frame;
enum ast_control_t38 t38control;
t30_state_t *t30state;
t38_core_state_t *t38state;
@@ -570,6 +574,17 @@ static int transmit_t38(fax_session *s)
return -1;
}
t38_set_max_datagram_size(t38state, s->t38parameters.max_datagram);
if (s->t38parameters.fill_bit_removal) {
t38_set_fill_bit_removal(t38state, TRUE);
}
if (s->t38parameters.transcoding_mmr) {
t38_set_mmr_transcoding(t38state, TRUE);
} else if (s->t38parameters.transcoding_jbig) {
t38_set_jbig_transcoding(t38state, TRUE);
}
/* Setup logging */
set_logging(&t38.logging);
set_logging(&t30state->logging);
@@ -613,12 +628,9 @@ static int transmit_t38(fax_session *s)
state_change = ast_tvnow();
last_state = t30state->state;
}
} else if (inf->frametype == AST_FRAME_CONTROL && inf->subclass == AST_CONTROL_T38 &&
inf->datalen == sizeof(enum ast_control_t38)) {
t38control = *((enum ast_control_t38 *) inf->data.ptr);
if (t38control == AST_T38_TERMINATED || t38control == AST_T38_REFUSED) {
} else if (inf->frametype == AST_FRAME_CONTROL && inf->subclass == AST_CONTROL_T38_PARAMETERS) {
struct ast_control_t38_parameters *parameters = inf->data.ptr;
if (parameters->request_response == AST_T38_TERMINATED || parameters->request_response == AST_T38_REFUSED) {
ast_debug(1, "T38 down, terminating\n");
res = -1;
break;
@@ -709,7 +721,7 @@ static int sndfax_exec(struct ast_channel *chan, const char *data)
{
int res = 0;
char *parse;
fax_session session;
fax_session session = { 0, };
char restore_digit_detect = 0;
AST_DECLARE_APP_ARGS(args,