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More fax modem tweaks

This commit is contained in:
Steve Underwood 2012-08-26 19:30:42 +08:00
parent 887c373c92
commit ac9656015a
7 changed files with 74 additions and 77 deletions
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5
libs/spandsp/src/spandsp/image_translate.h
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@ -34,6 +34,11 @@
/*! \page image_translate_page Image translation
\section image_translate_page_sec_1 What does it do?
The image translate functions allow an image to be translated and resized between
various colour an monochrome formats. It also allows a colour or gray-scale image
to be reduced to a bi-level monochrome image. This is useful for preparing images
to be sent as traditional bi-level FAX pages.
\section image_translate_page_sec_2 How does it work?
\section image_translate_page_sec_3 How do I use it?

6
libs/spandsp/src/spandsp/private/fax_modems.h
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@ -115,9 +115,15 @@ struct fax_modems_state_s
/*! \brief The current receive signal handler */
span_rx_handler_t rx_handler;
/*! \brief The current receive signal handler. Actual receiving hops between this
and a dummy receive routine. */
span_rx_handler_t base_rx_handler;
void *rx_user_data;
/*! \brief The current receive missing signal fill-in handler */
span_rx_fillin_handler_t rx_fillin_handler;
/*! \brief The current receive signal fillin handler. Actual receiving hops between this
and a dummy receive routine. */
span_rx_fillin_handler_t base_rx_fillin_handler;
void *rx_fillin_user_data;
/*! \brief The current transmit signal handler */

4
libs/spandsp/src/spandsp/private/t38_gateway.h
View File

@ -59,10 +59,6 @@ typedef struct
{
/*! \brief The FAX modem set for the audio side fo the gateway. */
fax_modems_state_t modems;
/*! \brief The current receive signal handler. Actual receiving hops between this
and a dummy receive routine. */
span_rx_handler_t base_rx_handler;
span_rx_fillin_handler_t base_rx_fillin_handler;
} t38_gateway_audio_state_t;
/*!

2
libs/spandsp/src/spandsp/private/t85.h
View File

@ -62,7 +62,7 @@ struct t85_encode_state_s
uint32_t xd;
/*! The height of the full image, in pixels */
uint32_t yd;
/*! Then number of rows per stripe */
/*! The number of rows per stripe */
uint32_t l0;
/*! Maximum ATMOVE window size (0 - 127) */
int mx;

12
libs/spandsp/src/spandsp/t85.h
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@ -87,6 +87,12 @@ SPAN_DECLARE(int) t85_encode_set_row_read_handler(t85_encode_state_t *s,
t4_row_read_handler_t handler,
void *user_data);
/*! Get the logging context associated with a T.85 encode context.
\brief Get the logging context associated with a T.85 encode context.
\param s The T.85 encode context.
\return A pointer to the logging context */
SPAN_DECLARE(logging_state_t *) t85_encode_get_logging_state(t85_encode_state_t *s);
/*! \brief Prepare to encode an image in T.85 format.
\param s The T.85 context.
\param image_width Image width, in pixels.
@ -164,6 +170,12 @@ SPAN_DECLARE(int) t85_encode_get_compressed_image_size(t85_encode_state_t *s);
\param s The T.85 context. */
SPAN_DECLARE(void) t85_encode_abort(t85_encode_state_t *s);
/*! Get the logging context associated with a T.85 decode context.
\brief Get the logging context associated with a T.85 decode context.
\param s The T.85 decode context.
\return A pointer to the logging context */
SPAN_DECLARE(logging_state_t *) t85_decode_get_logging_state(t85_decode_state_t *s);
/*! \brief Prepare to decode an image in T.85 format.
\param s The T.85 context.
\param handler A callback routine to handle decoded image rows.

113
libs/spandsp/src/t38_gateway.c
View File

@ -196,43 +196,31 @@ static void non_ecm_remove_fill_and_put_bit(void *user_data, int bit);
static void non_ecm_push_residue(t38_gateway_state_t *s);
static void tone_detected(void *user_data, int tone, int level, int delay);
static void set_rx_handler(t38_gateway_state_t *s,
static void set_rx_handler(fax_modems_state_t *s,
span_rx_handler_t handler,
void *user_data,
span_rx_fillin_handler_t fillin_handler,
void *rx_fillin_user_data)
void *fillin_user_data)
{
if (s->audio.modems.rx_handler != span_dummy_rx)
{
s->audio.modems.rx_handler = handler;
s->audio.modems.rx_fillin_handler = fillin_handler;
}
/* Only update the actual handlers if they are not currently sidelined to dummy targets */
if (s->rx_handler != span_dummy_rx)
s->rx_handler = handler;
/*endif*/
s->audio.base_rx_handler = handler;
s->audio.base_rx_fillin_handler = fillin_handler;
s->audio.modems.rx_user_data = user_data;
s->audio.modems.rx_fillin_user_data = rx_fillin_user_data;
}
/*- End of function --------------------------------------------------------*/
s->base_rx_handler = handler;
s->rx_user_data = user_data;
static void set_tx_handler(t38_gateway_state_t *s, span_tx_handler_t handler, void *user_data)
{
s->audio.modems.tx_handler = handler;
s->audio.modems.tx_user_data = user_data;
}
/*- End of function --------------------------------------------------------*/
static void set_next_tx_handler(t38_gateway_state_t *s, span_tx_handler_t handler, void *user_data)
{
s->audio.modems.next_tx_handler = handler;
s->audio.modems.next_tx_user_data = user_data;
if (s->rx_fillin_handler != span_dummy_rx_fillin)
s->rx_fillin_handler = fillin_handler;
/*endif*/
s->base_rx_fillin_handler = fillin_handler;
s->rx_fillin_user_data = fillin_user_data;
}
/*- End of function --------------------------------------------------------*/
static void set_rx_active(t38_gateway_state_t *s, int active)
{
s->audio.modems.rx_handler = (active) ? s->audio.base_rx_handler : span_dummy_rx;
s->audio.modems.rx_fillin_handler = (active) ? s->audio.base_rx_fillin_handler : span_dummy_rx_fillin;
s->audio.modems.rx_handler = (active) ? s->audio.modems.base_rx_handler : span_dummy_rx;
s->audio.modems.rx_fillin_handler = (active) ? s->audio.modems.base_rx_fillin_handler : span_dummy_rx_fillin;
}
/*- End of function --------------------------------------------------------*/
@ -259,18 +247,17 @@ static int v17_v21_rx(void *user_data, const int16_t amp[], int len)
v17_rx(&s->fast_modems.v17_rx, amp, len);
if (s->rx_trained)
{
/* The fast modem has trained, so we no longer need to run the slow
one in parallel. */
span_log(&t->logging, SPAN_LOG_FLOW, "Switching from V.17 + V.21 to V.17 (%.2fdBm0)\n", v17_rx_signal_power(&s->fast_modems.v17_rx));
set_rx_handler(t, (span_rx_handler_t) &v17_rx, &s->fast_modems.v17_rx, (span_rx_fillin_handler_t) &v17_rx_fillin, &s->fast_modems.v17_rx);
/* The fast modem has trained, so we no longer need to run the slow one in parallel. */
span_log(&s->logging, SPAN_LOG_FLOW, "Switching from V.17 + V.21 to V.17 (%.2fdBm0)\n", v17_rx_signal_power(&s->fast_modems.v17_rx));
set_rx_handler(s, (span_rx_handler_t) &v17_rx, &s->fast_modems.v17_rx, (span_rx_fillin_handler_t) &v17_rx_fillin, &s->fast_modems.v17_rx);
}
else
{
fsk_rx(&s->v21_rx, amp, len);
if (s->rx_signal_present)
{
span_log(&t->logging, SPAN_LOG_FLOW, "Switching from V.17 + V.21 to V.21 (%.2fdBm0)\n", fsk_rx_signal_power(&s->v21_rx));
set_rx_handler(t, (span_rx_handler_t) &fsk_rx, &s->v21_rx, (span_rx_fillin_handler_t) &fsk_rx_fillin, &s->v21_rx);
span_log(&s->logging, SPAN_LOG_FLOW, "Switching from V.17 + V.21 to V.21 (%.2fdBm0)\n", fsk_rx_signal_power(&s->v21_rx));
set_rx_handler(s, (span_rx_handler_t) &fsk_rx, &s->v21_rx, (span_rx_fillin_handler_t) &fsk_rx_fillin, &s->v21_rx);
}
/*endif*/
}
@ -302,18 +289,17 @@ static int v27ter_v21_rx(void *user_data, const int16_t amp[], int len)
v27ter_rx(&s->fast_modems.v27ter_rx, amp, len);
if (s->rx_trained)
{
/* The fast modem has trained, so we no longer need to run the slow
one in parallel. */
span_log(&t->logging, SPAN_LOG_FLOW, "Switching from V.27ter + V.21 to V.27ter (%.2fdBm0)\n", v27ter_rx_signal_power(&s->fast_modems.v27ter_rx));
set_rx_handler(t, (span_rx_handler_t) &v27ter_rx, &s->fast_modems.v27ter_rx, (span_rx_fillin_handler_t) &v27ter_v21_rx_fillin, &s->fast_modems.v27ter_rx);
/* The fast modem has trained, so we no longer need to run the slow one in parallel. */
span_log(&s->logging, SPAN_LOG_FLOW, "Switching from V.27ter + V.21 to V.27ter (%.2fdBm0)\n", v27ter_rx_signal_power(&s->fast_modems.v27ter_rx));
set_rx_handler(s, (span_rx_handler_t) &v27ter_rx, &s->fast_modems.v27ter_rx, (span_rx_fillin_handler_t) &v27ter_v21_rx_fillin, &s->fast_modems.v27ter_rx);
}
else
{
fsk_rx(&s->v21_rx, amp, len);
if (s->rx_signal_present)
{
span_log(&t->logging, SPAN_LOG_FLOW, "Switching from V.27ter + V.21 to V.21 (%.2fdBm0)\n", fsk_rx_signal_power(&s->v21_rx));
set_rx_handler(t, (span_rx_handler_t) &fsk_rx, &s->v21_rx, (span_rx_fillin_handler_t) &fsk_rx_fillin, &s->v21_rx);
span_log(&s->logging, SPAN_LOG_FLOW, "Switching from V.27ter + V.21 to V.21 (%.2fdBm0)\n", fsk_rx_signal_power(&s->v21_rx));
set_rx_handler(s, (span_rx_handler_t) &fsk_rx, &s->v21_rx, (span_rx_fillin_handler_t) &fsk_rx_fillin, &s->v21_rx);
}
/*endif*/
}
@ -345,18 +331,17 @@ static int v29_v21_rx(void *user_data, const int16_t amp[], int len)
v29_rx(&s->fast_modems.v29_rx, amp, len);
if (s->rx_trained)
{
/* The fast modem has trained, so we no longer need to run the slow
one in parallel. */
span_log(&t->logging, SPAN_LOG_FLOW, "Switching from V.29 + V.21 to V.29 (%.2fdBm0)\n", v29_rx_signal_power(&s->fast_modems.v29_rx));
set_rx_handler(t, (span_rx_handler_t) &v29_rx, &s->fast_modems.v29_rx, (span_rx_fillin_handler_t) &v29_rx_fillin, &s->fast_modems.v29_rx);
/* The fast modem has trained, so we no longer need to run the slow one in parallel. */
span_log(&s->logging, SPAN_LOG_FLOW, "Switching from V.29 + V.21 to V.29 (%.2fdBm0)\n", v29_rx_signal_power(&s->fast_modems.v29_rx));
set_rx_handler(s, (span_rx_handler_t) &v29_rx, &s->fast_modems.v29_rx, (span_rx_fillin_handler_t) &v29_rx_fillin, &s->fast_modems.v29_rx);
}
else
{
fsk_rx(&s->v21_rx, amp, len);
if (s->rx_signal_present)
{
span_log(&t->logging, SPAN_LOG_FLOW, "Switching from V.29 + V.21 to V.21 (%.2fdBm0)\n", fsk_rx_signal_power(&s->v21_rx));
set_rx_handler(t, (span_rx_handler_t) &fsk_rx, &s->v21_rx, (span_rx_fillin_handler_t) &fsk_rx_fillin, &s->v21_rx);
span_log(&s->logging, SPAN_LOG_FLOW, "Switching from V.29 + V.21 to V.21 (%.2fdBm0)\n", fsk_rx_signal_power(&s->v21_rx));
set_rx_handler(s, (span_rx_handler_t) &fsk_rx, &s->v21_rx, (span_rx_fillin_handler_t) &fsk_rx_fillin, &s->v21_rx);
}
/*endif*/
}
@ -434,8 +419,8 @@ static int set_next_tx_type(t38_gateway_state_t *s)
if (t->next_tx_handler)
{
/* There is a handler queued, so that is the next one. */
set_tx_handler(s, t->next_tx_handler, t->next_tx_user_data);
set_next_tx_handler(s, NULL, NULL);
fax_modems_set_tx_handler(t, t->next_tx_handler, t->next_tx_user_data);
fax_modems_set_next_tx_handler(t, NULL, NULL);
if (t->tx_handler == (span_tx_handler_t) &silence_gen
||
t->tx_handler == (span_tx_handler_t) &tone_gen)
@ -485,23 +470,23 @@ static int set_next_tx_type(t38_gateway_state_t *s)
t->tx_bit_rate = 0;
/* Impose 75ms minimum on transmitted silence */
//silence_gen_set(&t->silence_gen, ms_to_samples(75));
set_tx_handler(s, (span_tx_handler_t) &silence_gen, &t->silence_gen);
set_next_tx_handler(s, (span_tx_handler_t) NULL, NULL);
fax_modems_set_tx_handler(t, (span_tx_handler_t) &silence_gen, &t->silence_gen);
fax_modems_set_next_tx_handler(t, (span_tx_handler_t) NULL, NULL);
set_rx_active(s, TRUE);
break;
case T38_IND_CNG:
t->tx_bit_rate = 0;
modem_connect_tones_tx_init(&t->connect_tx, MODEM_CONNECT_TONES_FAX_CNG);
set_tx_handler(s, (span_tx_handler_t) &modem_connect_tones_tx, &t->connect_tx);
fax_modems_set_tx_handler(t, (span_tx_handler_t) &modem_connect_tones_tx, &t->connect_tx);
silence_gen_set(&t->silence_gen, 0);
set_next_tx_handler(s, (span_tx_handler_t) &silence_gen, &t->silence_gen);
fax_modems_set_next_tx_handler(t, (span_tx_handler_t) &silence_gen, &t->silence_gen);
set_rx_active(s, TRUE);
break;
case T38_IND_CED:
t->tx_bit_rate = 0;
modem_connect_tones_tx_init(&t->connect_tx, MODEM_CONNECT_TONES_FAX_CED);
set_tx_handler(s, (span_tx_handler_t) &modem_connect_tones_tx, &t->connect_tx);
set_next_tx_handler(s, (span_tx_handler_t) NULL, NULL);
fax_modems_set_tx_handler(t, (span_tx_handler_t) &modem_connect_tones_tx, &t->connect_tx);
fax_modems_set_next_tx_handler(t, (span_tx_handler_t) NULL, NULL);
set_rx_active(s, TRUE);
break;
case T38_IND_V21_PREAMBLE:
@ -511,8 +496,8 @@ static int set_next_tx_type(t38_gateway_state_t *s)
silence_gen_alter(&t->silence_gen, ms_to_samples(75));
u->buf[u->in].len = 0;
fsk_tx_init(&t->v21_tx, &preset_fsk_specs[FSK_V21CH2], (get_bit_func_t) hdlc_tx_get_bit, &t->hdlc_tx);
set_tx_handler(s, (span_tx_handler_t) &silence_gen, &t->silence_gen);
set_next_tx_handler(s, (span_tx_handler_t) &fsk_tx, &t->v21_tx);
fax_modems_set_tx_handler(t, (span_tx_handler_t) &silence_gen, &t->silence_gen);
fax_modems_set_next_tx_handler(t, (span_tx_handler_t) &fsk_tx, &t->v21_tx);
set_rx_active(s, TRUE);
break;
case T38_IND_V27TER_2400_TRAINING:
@ -522,8 +507,8 @@ static int set_next_tx_type(t38_gateway_state_t *s)
silence_gen_alter(&t->silence_gen, ms_to_samples(75));
v27ter_tx_restart(&t->fast_modems.v27ter_tx, t->tx_bit_rate, t->use_tep);
v27ter_tx_set_get_bit(&t->fast_modems.v27ter_tx, get_bit_func, get_bit_user_data);
set_tx_handler(s, (span_tx_handler_t) &silence_gen, &t->silence_gen);
set_next_tx_handler(s, (span_tx_handler_t) &v27ter_tx, &t->fast_modems.v27ter_tx);
fax_modems_set_tx_handler(t, (span_tx_handler_t) &silence_gen, &t->silence_gen);
fax_modems_set_next_tx_handler(t, (span_tx_handler_t) &v27ter_tx, &t->fast_modems.v27ter_tx);
set_rx_active(s, TRUE);
break;
case T38_IND_V29_7200_TRAINING:
@ -533,8 +518,8 @@ static int set_next_tx_type(t38_gateway_state_t *s)
silence_gen_alter(&t->silence_gen, ms_to_samples(75));
v29_tx_restart(&t->fast_modems.v29_tx, t->tx_bit_rate, t->use_tep);
v29_tx_set_get_bit(&t->fast_modems.v29_tx, get_bit_func, get_bit_user_data);
set_tx_handler(s, (span_tx_handler_t) &silence_gen, &t->silence_gen);
set_next_tx_handler(s, (span_tx_handler_t) &v29_tx, &t->fast_modems.v29_tx);
fax_modems_set_tx_handler(t, (span_tx_handler_t) &silence_gen, &t->silence_gen);
fax_modems_set_next_tx_handler(t, (span_tx_handler_t) &v29_tx, &t->fast_modems.v29_tx);
set_rx_active(s, TRUE);
break;
case T38_IND_V17_7200_SHORT_TRAINING:
@ -582,8 +567,8 @@ static int set_next_tx_type(t38_gateway_state_t *s)
silence_gen_alter(&t->silence_gen, ms_to_samples(75));
v17_tx_restart(&t->fast_modems.v17_tx, t->tx_bit_rate, t->use_tep, short_train);
v17_tx_set_get_bit(&t->fast_modems.v17_tx, get_bit_func, get_bit_user_data);
set_tx_handler(s, (span_tx_handler_t) &silence_gen, &t->silence_gen);
set_next_tx_handler(s, (span_tx_handler_t) &v17_tx, &t->fast_modems.v17_tx);
fax_modems_set_tx_handler(t, (span_tx_handler_t) &silence_gen, &t->silence_gen);
fax_modems_set_next_tx_handler(t, (span_tx_handler_t) &v17_tx, &t->fast_modems.v17_tx);
set_rx_active(s, TRUE);
break;
case T38_IND_V8_ANSAM:
@ -2150,23 +2135,23 @@ static int restart_rx_modem(t38_gateway_state_t *s)
case FAX_MODEM_V27TER_RX:
v27ter_rx_restart(&t->fast_modems.v27ter_rx, s->core.fast_bit_rate, FALSE);
v27ter_rx_set_put_bit(&t->fast_modems.v27ter_rx, put_bit_func, put_bit_user_data);
set_rx_handler(s, &v27ter_v21_rx, s, &v27ter_v21_rx_fillin, s);
set_rx_handler(t, &v27ter_v21_rx, s, &v27ter_v21_rx_fillin, s);
s->core.fast_rx_active = FAX_MODEM_V27TER_RX;
break;
case FAX_MODEM_V29_RX:
v29_rx_restart(&t->fast_modems.v29_rx, s->core.fast_bit_rate, FALSE);
v29_rx_set_put_bit(&t->fast_modems.v29_rx, put_bit_func, put_bit_user_data);
set_rx_handler(s, &v29_v21_rx, s, &v29_v21_rx_fillin, s);
set_rx_handler(t, &v29_v21_rx, s, &v29_v21_rx_fillin, s);
s->core.fast_rx_active = FAX_MODEM_V29_RX;
break;
case FAX_MODEM_V17_RX:
v17_rx_restart(&t->fast_modems.v17_rx, s->core.fast_bit_rate, s->core.short_train);
v17_rx_set_put_bit(&t->fast_modems.v17_rx, put_bit_func, put_bit_user_data);
set_rx_handler(s, &v17_v21_rx, s, &v17_v21_rx_fillin, s);
set_rx_handler(t, &v17_v21_rx, s, &v17_v21_rx_fillin, s);
s->core.fast_rx_active = FAX_MODEM_V17_RX;
break;
default:
set_rx_handler(s, (span_rx_handler_t) &fsk_rx, &t->v21_rx, (span_rx_fillin_handler_t) &fsk_rx_fillin, &t->v21_rx);
set_rx_handler(t, (span_rx_handler_t) &fsk_rx, &t->v21_rx, (span_rx_fillin_handler_t) &fsk_rx_fillin, &t->v21_rx);
s->core.fast_rx_active = FAX_MODEM_NONE;
break;
}

9
libs/spandsp/src/t4_tx.c
View File

@ -260,14 +260,7 @@ static int get_tiff_directory_info(t4_tx_state_t *s)
}
t4_tx_set_image_width(s, s->image_width);
t4_tx_set_image_length(s, s->image_length);
switch (s->line_encoding)
{
case T4_COMPRESSION_ITU_T4_1D:
case T4_COMPRESSION_ITU_T4_2D:
case T4_COMPRESSION_ITU_T6:
t4_t6_encode_set_max_2d_rows_per_1d_row(&s->encoder.t4_t6, -s->metadata.y_resolution);
break;
}
t4_tx_set_max_2d_rows_per_1d_row(s, -s->metadata.y_resolution);
#if defined(SPANDSP_SUPPORT_TIFF_FX)
if (TIFFGetField(t->tiff_file, TIFFTAG_PROFILETYPE, &parm32))
span_log(&s->logging, SPAN_LOG_FLOW, "Profile type %u\n", parm32);