SPAN_DECLARE(int) t4_rx_set_rx_encoding(t4_rx_state_t *s, int compression)
{
switch (compression)
{
case T4_COMPRESSION_T4_1D:
case T4_COMPRESSION_T4_2D:
case T4_COMPRESSION_T6:
switch (s->metadata.compression)
{
case T4_COMPRESSION_T4_1D:
case T4_COMPRESSION_T4_2D:
case T4_COMPRESSION_T6:
break;
default:
release_current_decoder(s);
t4_t6_decode_init(&s->decoder.t4_t6, compression, s->metadata.image_width, s->row_handler, s->row_handler_user_data);
s->current_decoder = T4_COMPRESSION_T4_1D | T4_COMPRESSION_T4_2D | T4_COMPRESSION_T6;
break;
}
s->metadata.compression = compression;
if (!select_tiff_compression(s, T4_IMAGE_TYPE_BILEVEL))
{
release_current_decoder(s);
s->current_decoder = 0;
pre_encoded_init(&s->decoder.no_decoder);
}
return t4_t6_decode_set_encoding(&s->decoder.t4_t6, compression);
case T4_COMPRESSION_T85:
case T4_COMPRESSION_T85_L0:
switch (s->metadata.compression)
{
case T4_COMPRESSION_T85:
case T4_COMPRESSION_T85_L0:
break;
default:
release_current_decoder(s);
t85_decode_init(&s->decoder.t85, s->row_handler, s->row_handler_user_data);
s->current_decoder = T4_COMPRESSION_T85 | T4_COMPRESSION_T85_L0;
/* Constrain received images to the maximum width of any FAX. This will
avoid one potential cause of trouble, where a bad received image has
a gigantic dimension that sucks our memory dry. */
t85_decode_set_image_size_constraints(&s->decoder.t85, T4_WIDTH_1200_A3, 0);
break;
}
s->metadata.compression = compression;
if (!select_tiff_compression(s, T4_IMAGE_TYPE_BILEVEL))
{
release_current_decoder(s);
s->current_decoder = 0;
pre_encoded_init(&s->decoder.no_decoder);
}
return 0;
#if defined(SPANDSP_SUPPORT_T88)
case T4_COMPRESSION_T88:
switch (s->metadata.compression)
{
case T4_COMPRESSION_T88:
break;
default:
release_current_decoder(s);
t88_decode_init(&s->decoder.t88, s->row_handler, s->row_handler_user_data);
s->current_decoder = T4_COMPRESSION_T88;
break;
}
s->metadata.compression = compression;
if (!select_tiff_compression(s, T4_IMAGE_TYPE_BILEVEL))
{
release_current_decoder(s);
s->current_decoder = 0;
pre_encoded_init(&s->decoder.no_decoder);
}
return 0;
#endif
case T4_COMPRESSION_T42_T81:
case T4_COMPRESSION_SYCC_T81:
switch (s->metadata.compression)
{
case T4_COMPRESSION_T42_T81:
case T4_COMPRESSION_SYCC_T81:
break;
default:
release_current_decoder(s);
t42_decode_init(&s->decoder.t42, s->row_handler, s->row_handler_user_data);
s->current_decoder = T4_COMPRESSION_T42_T81;
/* Constrain received images to the maximum width of any FAX. This will
avoid one potential cause of trouble, where a bad received image has
a gigantic dimension that sucks our memory dry. */
t42_decode_set_image_size_constraints(&s->decoder.t42, T4_WIDTH_1200_A3, 0);
break;
}
s->metadata.compression = compression;
if (!select_tiff_compression(s, T4_IMAGE_TYPE_COLOUR_8BIT))
{
release_current_decoder(s);
s->current_decoder = 0;
pre_encoded_init(&s->decoder.no_decoder);
}
return 0;
case T4_COMPRESSION_T43:
switch (s->metadata.compression)
{
case T4_COMPRESSION_T43:
break;
default:
release_current_decoder(s);
t43_decode_init(&s->decoder.t43, s->row_handler, s->row_handler_user_data);
s->current_decoder = T4_COMPRESSION_T43;
/* Constrain received images to the maximum width of any FAX. This will
avoid one potential cause of trouble, where a bad received image has
a gigantic dimension that sucks our memory dry. */
t43_decode_set_image_size_constraints(&s->decoder.t43, T4_WIDTH_1200_A3, 0);
break;
}
s->metadata.compression = compression;
if (!select_tiff_compression(s, T4_IMAGE_TYPE_COLOUR_8BIT))
{
release_current_decoder(s);
s->current_decoder = 0;
pre_encoded_init(&s->decoder.no_decoder);
}
return 0;
#if defined(SPANDSP_SUPPORT_T45)
case T4_COMPRESSION_T45:
switch (s->metadata.compression)
{
case T4_COMPRESSION_T45:
break;
default:
release_current_decoder(s);
t45_decode_init(&s->decoder.t45, s->row_handler, s->row_handler_user_data);
s->current_decoder = T4_COMPRESSION_T45;
break;
}
s->metadata.compression = compression;
if (!select_tiff_compression(s, T4_IMAGE_TYPE_COLOUR_8BIT))
{
release_current_decoder(s);
s->current_decoder = 0;
pre_encoded_init(&s->decoder.no_decoder);
}
return 0;
#endif
}
return -1;
}
SPAN_DECLARE(int) t4_rx_end_page(t4_rx_state_t *s)
{
int length;
length = 0;
switch (s->metadata.compression)
{
case T4_COMPRESSION_T4_1D:
case T4_COMPRESSION_T4_2D:
case T4_COMPRESSION_T6:
t4_t6_decode_put(&s->decoder.t4_t6, NULL, 0);
length = t4_t6_decode_get_image_length(&s->decoder.t4_t6);
break;
case T4_COMPRESSION_T85:
case T4_COMPRESSION_T85_L0:
t85_decode_put(&s->decoder.t85, NULL, 0);
length = t85_decode_get_image_length(&s->decoder.t85);
break;
#if defined(SPANDSP_SUPPORT_T88)
case T4_COMPRESSION_T88:
t88_decode_put(&s->decoder.t88, NULL, 0);
length = t88_decode_get_image_length(&s->decoder.t88);
break;
#endif
case T4_COMPRESSION_T42_T81:
t42_decode_put(&s->decoder.t42, NULL, 0);
length = t42_decode_get_image_length(&s->decoder.t42);
if (s->decoder.t42.samples_per_pixel == 3)
select_tiff_compression(s, T4_IMAGE_TYPE_COLOUR_8BIT);
else
select_tiff_compression(s, T4_IMAGE_TYPE_GRAY_8BIT);
break;
#if defined(SPANDSP_SUPPORT_T43)
case T4_COMPRESSION_T43:
t43_decode_put(&s->decoder.t43, NULL, 0);
length = t43_decode_get_image_length(&s->decoder.t43);
break;
#endif
#if defined(SPANDSP_SUPPORT_T45)
case T4_COMPRESSION_T45:
t45_decode_put(&s->decoder.t45, NULL, 0);
length = t45_decode_get_image_length(&s->decoder.t45);
break;
#endif
}
if (length == 0)
return -1;
if (s->tiff.tiff_file)
{
if (write_tiff_image(s) == 0)
s->current_page++;
s->tiff.image_size = 0;
}
else
{
s->current_page++;
}
return 0;
}