cea708_t* _mpeg_bitstream_cea708_emplace_back(mpeg_bitstream_t* packet, double timestamp)
{
++packet->latent;
cea708_t* cea708 = _mpeg_bitstream_cea708_back(packet);
cea708_init(cea708, timestamp);
return cea708;
}
void sei_append_708(sei_t* sei, cea708_t* cea708)
{
sei_message_t* msg = sei_message_new(sei_type_user_data_registered_itu_t_t35, 0, CEA608_MAX_SIZE);
msg->size = cea708_render(cea708, sei_message_data(msg), sei_message_size(msg));
sei_message_append(sei, msg);
cea708_init(cea708, sei->timestamp); // will confgure using HLS compatiable defaults
}
void sei_dump_messages(sei_message_t* head, double timestamp)
{
cea708_t cea708;
sei_message_t* msg;
cea708_init(&cea708, timestamp);
for (msg = head; msg; msg = sei_message_next(msg)) {
uint8_t* data = sei_message_data(msg);
size_t size = sei_message_size(msg);
fprintf(stderr, "-- Message %p\n-- Message Type: %d\n-- Message Size: %d\n", data, sei_message_type(msg), (int)size);
while (size) {
fprintf(stderr, "%02X ", *data);
++data;
--size;
}
fprintf(stderr, "\n");
if (sei_type_user_data_registered_itu_t_t35 == sei_message_type(msg)) {
if (LIBCAPTION_OK != cea708_parse_h262(sei_message_data(msg), sei_message_size(msg), &cea708)) {
fprintf(stderr, "cea708_parse error\n");
} else {
cea708_dump(&cea708);
}
}
}
}
void sei_dump_messages (sei_message_t* head)
{
cea708_t cea708;
sei_message_t* msg;
cea708_init (&cea708);
for (msg = head ; msg ; msg = sei_message_next (msg)) {
uint8_t* data = sei_message_data (msg);
size_t size = sei_message_size (msg);
fprintf (stderr,"-- Message %p\n-- Message Type: %d\n-- Message Size: %d\n", data, sei_message_type (msg), (int) size);
while (size) {
fprintf (stderr,"%02X ", *data);
++data; --size;
}
fprintf (stderr,"\n");
if (sei_type_user_data_registered_itu_t_t35 == sei_message_type (msg)) {
cea708_parse (sei_message_data (msg), sei_message_size (msg), &cea708);
cea708_dump (&cea708);
}
}
}
libcaption_stauts_t sei_from_caption_clear(sei_t* sei)
{
cea708_t cea708;
cea708_init(&cea708, sei->timestamp); // set up a new popon frame
cea708_add_cc_data(&cea708, 1, cc_type_ntsc_cc_field_1, eia608_control_command(eia608_control_end_of_caption, DEFAULT_CHANNEL));
cea708_add_cc_data(&cea708, 1, cc_type_ntsc_cc_field_1, eia608_control_command(eia608_control_end_of_caption, DEFAULT_CHANNEL));
cea708_add_cc_data(&cea708, 1, cc_type_ntsc_cc_field_1, eia608_control_command(eia608_control_erase_non_displayed_memory, DEFAULT_CHANNEL));
cea708_add_cc_data(&cea708, 1, cc_type_ntsc_cc_field_1, eia608_control_command(eia608_control_erase_non_displayed_memory, DEFAULT_CHANNEL));
cea708_add_cc_data(&cea708, 1, cc_type_ntsc_cc_field_1, eia608_control_command(eia608_control_erase_display_memory, DEFAULT_CHANNEL));
cea708_add_cc_data(&cea708, 1, cc_type_ntsc_cc_field_1, eia608_control_command(eia608_control_erase_display_memory, DEFAULT_CHANNEL));
sei_append_708(sei, &cea708);
return LIBCAPTION_OK;
}
libcaption_stauts_t sei_from_scc(sei_t* sei, const scc_t* scc)
{
unsigned int i;
cea708_t cea708;
cea708_init(&cea708, sei->timestamp); // set up a new popon frame
for (i = 0; i < scc->cc_size; ++i) {
if (31 == cea708.user_data.cc_count) {
sei_append_708(sei, &cea708);
}
cea708_add_cc_data(&cea708, 1, cc_type_ntsc_cc_field_1, scc->cc_data[i]);
}
if (0 != cea708.user_data.cc_count) {
sei_append_708(sei, &cea708);
}
return LIBCAPTION_OK;
}
libcaption_stauts_t sei_to_caption_frame(sei_t* sei, caption_frame_t* frame)
{
cea708_t cea708;
sei_message_t* msg;
libcaption_stauts_t status = LIBCAPTION_OK;
cea708_init(&cea708, frame->timestamp);
for (msg = sei_message_head(sei); msg; msg = sei_message_next(msg)) {
if (sei_type_user_data_registered_itu_t_t35 == sei_message_type(msg)) {
cea708_parse_h264(sei_message_data(msg), sei_message_size(msg), &cea708);
status = libcaption_status_update(status, cea708_to_caption_frame(frame, &cea708));
}
}
if (LIBCAPTION_READY == status) {
frame->timestamp = sei->timestamp;
}
return status;
}
////////////////////////////////////////////////////////////////////////////////
// TODO move this out of sei
libcaption_stauts_t sei_from_caption_frame(sei_t* sei, caption_frame_t* frame)
{
int r, c;
int unl, prev_unl;
cea708_t cea708;
const char* data;
uint16_t prev_cc_data;
eia608_style_t styl, prev_styl;
sei_init(sei, frame->timestamp);
cea708_init(&cea708, frame->timestamp); // set up a new popon frame
cea708_add_cc_data(&cea708, 1, cc_type_ntsc_cc_field_1, eia608_control_command(eia608_control_erase_non_displayed_memory, DEFAULT_CHANNEL));
cea708_add_cc_data(&cea708, 1, cc_type_ntsc_cc_field_1, eia608_control_command(eia608_control_resume_caption_loading, DEFAULT_CHANNEL));
for (r = 0; r < SCREEN_ROWS; ++r) {
prev_unl = 0, prev_styl = eia608_style_white;
// Calculate preamble
for (c = 0; c < SCREEN_COLS && 0 == *caption_frame_read_char(frame, r, c, &styl, &unl); ++c) {
}
// This row is blank
if (SCREEN_COLS == c) {
continue;
}
// Write preamble
if (0 < c || (0 == unl && eia608_style_white == styl)) {
int tab = c % 4;
sei_encode_eia608(sei, &cea708, eia608_row_column_pramble(r, c, DEFAULT_CHANNEL, 0));
if (tab) {
sei_encode_eia608(sei, &cea708, eia608_tab(tab, DEFAULT_CHANNEL));
}
} else {
sei_encode_eia608(sei, &cea708, eia608_row_style_pramble(r, DEFAULT_CHANNEL, styl, unl));
prev_unl = unl, prev_styl = styl;
}
// Write the row
for (prev_cc_data = 0, data = caption_frame_read_char(frame, r, c, 0, 0);
(*data) && c < SCREEN_COLS; ++c, data = caption_frame_read_char(frame, r, c, &styl, &unl)) {
uint16_t cc_data = eia608_from_utf8_1(data, DEFAULT_CHANNEL);
if (unl != prev_unl || styl != prev_styl) {
sei_encode_eia608(sei, &cea708, eia608_midrow_change(DEFAULT_CHANNEL, styl, unl));
prev_unl = unl, prev_styl = styl;
}
if (!cc_data) {
// We do't want to write bad data, so just ignore it.
} else if (eia608_is_basicna(prev_cc_data)) {
if (eia608_is_basicna(cc_data)) {
// previous and current chars are both basicna, combine them into current
sei_encode_eia608(sei, &cea708, eia608_from_basicna(prev_cc_data, cc_data));
} else if (eia608_is_westeu(cc_data)) {
// extended charcters overwrite the previous charcter, so insert a dummy char thren write the extended char
sei_encode_eia608(sei, &cea708, eia608_from_basicna(prev_cc_data, eia608_from_utf8_1(EIA608_CHAR_SPACE, DEFAULT_CHANNEL)));
sei_encode_eia608(sei, &cea708, cc_data);
} else {
// previous was basic na, but current isnt; write previous and current
sei_encode_eia608(sei, &cea708, prev_cc_data);
sei_encode_eia608(sei, &cea708, cc_data);
}
prev_cc_data = 0; // previous is handled, we can forget it now
} else if (eia608_is_westeu(cc_data)) {
// extended chars overwrite the previous chars, so insert a dummy char
// TODO create a map of alternamt chars for eia608_is_westeu instead of using space
sei_encode_eia608(sei, &cea708, eia608_from_utf8_1(EIA608_CHAR_SPACE, DEFAULT_CHANNEL));
sei_encode_eia608(sei, &cea708, cc_data);
} else if (eia608_is_basicna(cc_data)) {
prev_cc_data = cc_data;
} else {
sei_encode_eia608(sei, &cea708, cc_data);
}
if (eia608_is_specialna(cc_data)) {
// specialna are treated as control charcters. Duplicated control charcters are discarded
// So we write a resume after a specialna as a noop to break repetition detection
// TODO only do this if the same charcter is repeated
sei_encode_eia608(sei, &cea708, eia608_control_command(eia608_control_resume_caption_loading, DEFAULT_CHANNEL));
}
}
if (0 != prev_cc_data) {
sei_encode_eia608(sei, &cea708, prev_cc_data);
}
}
sei_encode_eia608(sei, &cea708, 0); // flush
sei->timestamp = frame->timestamp; // assumes in order frames
// sei_dump (sei);
return LIBCAPTION_OK;
}
