static void parse_cc_service_stream(CC708Reader* cc, uint service_num)
{
const int blk_size = cc->buf_size[service_num];
int blk_start = 0, dlc_loc = 0, rst_loc = 0, i = 0;
// find last reset or delay cancel in buffer
for (i = 0; i < blk_size; i++)
{
if (RST == cc->buf[service_num][i])
rst_loc = dlc_loc = i;
else if (DLC == cc->buf[service_num][i])
dlc_loc = i;
}
// reset, process only data after reset
if (rst_loc)
{
cc->Reset(service_num);
cc->delayed[service_num] = 0; // Reset implicitly cancels delay
blk_start = rst_loc + 1;
}
// if we have a delay cancel, cancel any delay
if (dlc_loc && cc->delayed[service_num])
{
cc->DelayCancel(service_num);
cc->delayed[service_num] = 0;
}
// cancel delay if the buffer is full
if (cc->delayed[service_num] && blk_size >= 126)
{
cc->DelayCancel(service_num);
cc->delayed[service_num] = 0;
dlc_loc = blk_size - 1;
}
/*
av_log(NULL, AV_LOG_ERROR,
"cc_ss delayed(%i) blk_start(%i) blk_size(%i)\n",
cc->delayed, blk_start, blk_size);
*/
for (int i = (cc->delayed[service_num]) ? blk_size : blk_start;
i < blk_size; )
{
const int old_i = i;
const int code = cc->buf[service_num][i];
if (0x0 == code)
{
i++;
}
else if (code <= 0x1f)
{
// C0 code -- ASCII commands + ext1: C2,C3,G2,G3 + p16: 16 chars
i = handle_cc_c0_ext1_p16(cc, service_num, i);
}
else if (code <= 0x7f)
{
// G0 code -- mostly ASCII printables
short character = CCtableG0[code-0x20];
append_character(cc, service_num, character);
i++;
SEND_STR;
}
else if (code <= 0x9f)
{
// C1 code -- caption control codes
i = handle_cc_c1(cc, service_num, i);
}
else if (code <= 0xff)
{
// G1 code -- ISO 8859-1 Latin 1 characters
short character = CCtableG1[code-0xA0];
append_character(cc, service_num, character);
i++;
}
#if DEBUG_CC_SERVICE
fprintf(stderr, "i %i, blk_size %i\n", i, blk_size);
#endif
// loop continuation check
if (old_i == i)
{
#if DEBUG_CC_SERVICE
fprintf(stderr, "old_i == i == %i\n", i);
for (int j = 0; j < blk_size; j++)
fprintf(stderr, "0x%x ", cc->buf[service_num][j]);
fprintf(stderr, "\n");
#endif
if (blk_size - i > 10)
{
fprintf(stderr, "eia-708 decoding error...");
cc->Reset(service_num);
cc->delayed[service_num] = 0;
i = cc->buf_size[service_num];
}
// There must be an incomplete code in buffer...
break;
}
else if (cc->delayed[service_num] && dlc_loc < i)
{
// delay in effect
break;
}
else if (cc->delayed[service_num])
{
// this delay has already been canceled..
cc->DelayCancel(service_num);
cc->delayed[service_num] = 0;
}
}
// get rid of remaining bytes...
assert(((int)blk_size - i) >= 0);
if ((blk_size - i) > 0)
{
memmove(cc->buf[service_num], cc->buf[service_num] + i,
blk_size - i);
cc->buf_size[service_num] -= i;
}
else
{
if (0 != (blk_size - i))
{
fprintf(stderr, "parse_cc_service_stream buffer error "
"i(%i) buf_size(%i)\n", i, blk_size);
for (i=0; i < blk_size; i++)
fprintf(stderr, "0x%x ", cc->buf[service_num][i]);
fprintf(stderr, "\n");
}
cc->buf_size[service_num] = 0;
}
}
static void parse_cc_service_stream(CC708Reader* cc, uint service_num)
{
const int blk_size = cc->buf_size[service_num];
int blk_start = 0, dlc_loc = 0, rst_loc = 0, i = 0;
// find last reset or delay cancel in buffer
for (i = 0; i < blk_size; i++)
{
switch (cc->buf[service_num][i]) {
// Skip over parameters, since their bytes may coincide
// with RST or DLC
case CLW:
case DLW:
case DSW:
case HDW:
case TGW:
case DLY:
i += 1;
break;
case SPA:
case SPL:
i += 2;
break;
case SPC:
i += 3;
break;
case SWA:
i += 4;
break;
case DF0:
case DF1:
case DF2:
case DF3:
case DF4:
case DF5:
case DF6:
case DF7:
i += 6;
break;
// Detect RST or DLC bytes
case RST:
rst_loc = dlc_loc = i;
break;
case DLC:
dlc_loc = i;
break;
}
}
// reset, process only data after reset
if (rst_loc)
{
cc->Reset(service_num);
cc->delayed[service_num] = 0; // Reset implicitly cancels delay
blk_start = rst_loc + 1;
}
// if we have a delay cancel, cancel any delay
if (dlc_loc && cc->delayed[service_num])
{
cc->DelayCancel(service_num);
cc->delayed[service_num] = 0;
}
// cancel delay if the buffer is full
if (cc->delayed[service_num] && blk_size >= 126)
{
cc->DelayCancel(service_num);
cc->delayed[service_num] = 0;
dlc_loc = blk_size - 1;
}
#if 0
LOG(VB_GENERAL, LOG_ERR,
QString("cc_ss delayed(%1) blk_start(%2) blk_size(%3)")
.arg(cc->delayed) .arg(blk_start) .arg(blk_size));
#endif
for (i = (cc->delayed[service_num]) ? blk_size : blk_start;
i < blk_size; )
{
const int old_i = i;
const int code = cc->buf[service_num][i];
if (0x0 == code)
{
i++;
}
else if (code <= 0x1f)
{
// C0 code -- ASCII commands + ext1: C2,C3,G2,G3 + p16: 16 chars
i = handle_cc_c0_ext1_p16(cc, service_num, i);
}
else if (code <= 0x7f)
{
// G0 code -- mostly ASCII printables
short character = CCtableG0[code-0x20];
append_character(cc, service_num, character);
i++;
SEND_STR;
}
else if (code <= 0x9f)
{
// C1 code -- caption control codes
i = handle_cc_c1(cc, service_num, i);
}
else if (code <= 0xff)
{
// G1 code -- ISO 8859-1 Latin 1 characters
short character = CCtableG1[code-0xA0];
append_character(cc, service_num, character);
i++;
}
#if DEBUG_CC_SERVICE
LOG(VB_GENERAL, LOG_DEBUG, QString("i %1, blk_size %2").arg(i)
.arg(blk_size));
#endif
// loop continuation check
if (old_i == i)
{
#if DEBUG_CC_SERVICE
LOG(VB_GENERAL, LOG_DEBUG, QString("old_i == i == %1").arg(i));
QString msg;
for (int j = 0; j < blk_size; j++)
msg += QString("0x%1 ").arg(cc->buf[service_num][j], 0, 16);
LOG(VB_GENERAL, LOG_DEBUG, msg);
#endif
if (blk_size - i > 10)
{
LOG(VB_GENERAL, LOG_INFO, "eia-708 decoding error...");
cc->Reset(service_num);
cc->delayed[service_num] = 0;
i = cc->buf_size[service_num];
}
// There must be an incomplete code in buffer...
break;
}
else if (cc->delayed[service_num] && dlc_loc < i)
{
// delay in effect
break;
}
else if (cc->delayed[service_num])
{
// this delay has already been canceled..
cc->DelayCancel(service_num);
cc->delayed[service_num] = 0;
}
}
// get rid of remaining bytes...
assert(((int)blk_size - i) >= 0);
if ((blk_size - i) > 0)
{
memmove(cc->buf[service_num], cc->buf[service_num] + i,
blk_size - i);
cc->buf_size[service_num] -= i;
}
else
{
if (0 != (blk_size - i))
{
LOG(VB_GENERAL, LOG_ERR, QString("buffer error i(%1) buf_size(%2)")
.arg(i).arg(blk_size));
QString msg;
for (i=0; i < blk_size; i++)
msg += QString("0x%1 ").arg(cc->buf[service_num][i], 0, 16);
LOG(VB_GENERAL, LOG_ERR, msg);
}
cc->buf_size[service_num] = 0;
}
}
