pbm_getc (int infile)
/* Read next char, skipping over any comments */
/* A comment/newline sequence is returned as a newline */
{
register int ch;
ch = _getc(infile);
if (ch == '#') {
do {
ch = _getc(infile);
} while (ch != '\n' && ch != EOF);
}
return ch;
}
void filecopy(_FILE *ifp, _FILE *ofp)
{
int c;
while ((c = _getc(ifp)) != EOF)
_putc(c, ofp);
}
ssize_t Stream::read(void* buffer, size_t length) {
char* ptr = (char*)buffer;
char* end = ptr + length;
while (ptr != end) {
int c = _getc();
if (c==EOF) break;
*ptr++ = c;
}
return ptr - (const char*)buffer;
}
void USBSerial::on_main_loop(void *argument)
{
// apparently some OSes don't assert DTR when a program opens the port
if (available() && !attach)
attach = true;
if (attach != attached)
{
if (attach)
{
attached = true;
THEKERNEL->streams->append_stream(this);
writeBlock((const uint8_t *) "Smoothie\nok\n", 12);
}
else
{
attached = false;
THEKERNEL->streams->remove_stream(this);
txbuf.flush();
rxbuf.flush();
nl_in_rx = 0;
}
}
if (nl_in_rx)
{
string received;
while (available())
{
char c = _getc();
if( c == '\n' || c == '\r')
{
struct SerialMessage message;
message.message = received;
message.stream = this;
iprintf("USBSerial Received: %s\n", message.message.c_str());
THEKERNEL->call_event(ON_CONSOLE_LINE_RECEIVED, &message );
return;
}
else
{
received += c;
}
}
}
}
start_input_ppm (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
{
ppm_source_ptr source = (ppm_source_ptr) sinfo;
int c;
unsigned int w, h, maxval;
boolean need_iobuffer, use_raw_buffer, need_rescale;
if (_getc(source->pub.input_file) != 'P')
ERREXIT(cinfo, JERR_PPM_NOT);
c = _getc(source->pub.input_file); /* subformat discriminator character */
/* detect unsupported variants (ie, PBM) before trying to read header */
switch (c) {
case '2': /* it's a text-format PGM file */
case '3': /* it's a text-format PPM file */
case '5': /* it's a raw-format PGM file */
case '6': /* it's a raw-format PPM file */
break;
default:
ERREXIT(cinfo, JERR_PPM_NOT);
break;
}
/* fetch the remaining header info */
w = read_pbm_integer(cinfo, source->pub.input_file);
h = read_pbm_integer(cinfo, source->pub.input_file);
maxval = read_pbm_integer(cinfo, source->pub.input_file);
if (w <= 0 || h <= 0 || maxval <= 0) /* error check */
ERREXIT(cinfo, JERR_PPM_NOT);
cinfo->data_precision = BITS_IN_JSAMPLE; /* we always rescale data to this */
cinfo->image_width = (JDIMENSION) w;
cinfo->image_height = (JDIMENSION) h;
/* initialize flags to most common settings */
need_iobuffer = TRUE; /* do we need an I/O buffer? */
use_raw_buffer = FALSE; /* do we map input buffer onto I/O buffer? */
need_rescale = TRUE; /* do we need a rescale array? */
switch (c) {
case '2': /* it's a text-format PGM file */
cinfo->input_components = 1;
cinfo->in_color_space = JCS_GRAYSCALE;
TRACEMS2(cinfo, 1, JTRC_PGM_TEXT, w, h);
source->pub.get_pixel_rows = get_text_gray_row;
need_iobuffer = FALSE;
break;
case '3': /* it's a text-format PPM file */
cinfo->input_components = 3;
cinfo->in_color_space = JCS_RGB;
TRACEMS2(cinfo, 1, JTRC_PPM_TEXT, w, h);
source->pub.get_pixel_rows = get_text_rgb_row;
need_iobuffer = FALSE;
break;
case '5': /* it's a raw-format PGM file */
cinfo->input_components = 1;
cinfo->in_color_space = JCS_GRAYSCALE;
TRACEMS2(cinfo, 1, JTRC_PGM, w, h);
if (maxval > 255) {
source->pub.get_pixel_rows = get_word_gray_row;
} else if (maxval == MAXJSAMPLE && SIZEOF(JSAMPLE) == SIZEOF(U_CHAR)) {
source->pub.get_pixel_rows = get_raw_row;
use_raw_buffer = TRUE;
need_rescale = FALSE;
} else {
source->pub.get_pixel_rows = get_scaled_gray_row;
}
break;
case '6': /* it's a raw-format PPM file */
cinfo->input_components = 3;
cinfo->in_color_space = JCS_RGB;
TRACEMS2(cinfo, 1, JTRC_PPM, w, h);
if (maxval > 255) {
source->pub.get_pixel_rows = get_word_rgb_row;
} else if (maxval == MAXJSAMPLE && SIZEOF(JSAMPLE) == SIZEOF(U_CHAR)) {
source->pub.get_pixel_rows = get_raw_row;
use_raw_buffer = TRUE;
need_rescale = FALSE;
} else {
source->pub.get_pixel_rows = get_scaled_rgb_row;
}
break;
}
/* Allocate space for I/O buffer: 1 or 3 bytes or words/pixel. */
if (need_iobuffer) {
source->buffer_width = (size_t) w * cinfo->input_components *
((maxval<=255) ? SIZEOF(U_CHAR) : (2*SIZEOF(U_CHAR)));
source->iobuffer = (U_CHAR *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
source->buffer_width);
}
/* Create compressor input buffer. */
if (use_raw_buffer) {
/* For unscaled raw-input case, we can just map it onto the I/O buffer. */
/* Synthesize a JSAMPARRAY pointer structure */
/* Cast here implies near->far pointer conversion on PCs */
source->pixrow = (JSAMPROW) source->iobuffer;
source->pub.buffer = & source->pixrow;
source->pub.buffer_height = 1;
} else {
/* Need to translate anyway, so make a separate sample buffer. */
source->pub.buffer = (*cinfo->mem->alloc_sarray)
((j_common_ptr) cinfo, JPOOL_IMAGE,
(JDIMENSION) w * cinfo->input_components, (JDIMENSION) 1);
source->pub.buffer_height = 1;
}
/* Compute the rescaling array if required. */
if (need_rescale) {
INT32 val, half_maxval;
/* On 16-bit-int machines we have to be careful of maxval = 65535 */
source->rescale = (JSAMPLE *)
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
(size_t) (((long) maxval + 1L) * SIZEOF(JSAMPLE)));
half_maxval = maxval / 2;
for (val = 0; val <= (INT32) maxval; val++) {
/* The multiplication here must be done in 32 bits to avoid overflow */
source->rescale[val] = (JSAMPLE) ((val*MAXJSAMPLE + half_maxval)/maxval);
}
}
}
