diff options
Diffstat (limited to 'src/mot-encoder.cpp')
| -rw-r--r-- | src/mot-encoder.cpp | 54 |
1 files changed, 23 insertions, 31 deletions
diff --git a/src/mot-encoder.cpp b/src/mot-encoder.cpp index 91362e1..a8efbaf 100644 --- a/src/mot-encoder.cpp +++ b/src/mot-encoder.cpp @@ -235,7 +235,7 @@ void writeMotPAD(int output_fd, DATA_GROUP &mscdg, unsigned short int padlen); -void create_dls_pads(const std::string& text, const int padlen, const uint8_t charset); +void create_dls_pads(const std::string& text, int padlen, uint8_t charset); void writeDLS(int output_fd, const std::string& dls_file, int padlen, uint8_t charset, bool raw_dls); // PAD related @@ -260,6 +260,9 @@ struct DATA_GROUP { for (size_t i = 0; i < data.size(); i++) crc = update_crc_ccitt(crc, data[i]); crc = ~crc; +#if DEBUG + fprintf(stderr, "crc=%04x ~crc=%04x\n", crc, ~crc); +#endif data.push_back((crc & 0xFF00) >> 8); data.push_back((crc & 0x00FF)); @@ -296,7 +299,6 @@ static int cindex_body = 0; #define FPAD_LEN 2 #define DLS_SEG_LEN_PREFIX 2 #define DLS_SEG_LEN_CHAR_MAX 16 -#define DLS_SEG_LEN_MAX (DLS_SEG_LEN_PREFIX + DLS_SEG_LEN_CHAR_MAX + CRC_LEN) CharsetConverter charset_converter; @@ -1064,19 +1066,16 @@ int dls_count(const std::string& text) { } -size_t dls_get(const std::string& text, const uint8_t charset, const unsigned int seg_index, uint8_t *seg_data) { - int seg_count = dls_count(text); - if (seg_index >= seg_count) - return 0; - +DATA_GROUP dls_get(const std::string& text, uint8_t charset, unsigned int seg_index) { bool first_seg = seg_index == 0; - bool last_seg = seg_index == seg_count - 1; + bool last_seg = seg_index == dls_count(text) - 1; int seg_text_offset = seg_index * DLS_SEG_LEN_CHAR_MAX; const char *seg_text_start = text.c_str() + seg_text_offset; size_t seg_text_len = MIN(text.size() - seg_text_offset, DLS_SEG_LEN_CHAR_MAX); - size_t seg_len = DLS_SEG_LEN_PREFIX + seg_text_len + CRC_LEN; + DATA_GROUP dg(DLS_SEG_LEN_PREFIX + seg_text_len, 2, 3); + uint8_vector_t &seg_data = dg.data; // prefix: toggle? + first seg? + last seg? + (seg len - 1) seg_data[0] = @@ -1089,31 +1088,22 @@ size_t dls_get(const std::string& text, const uint8_t charset, const unsigned in seg_data[1] = (first_seg ? charset : seg_index) << 4; // character field - memcpy(seg_data + DLS_SEG_LEN_PREFIX, seg_text_start, seg_text_len); + memcpy(&seg_data[DLS_SEG_LEN_PREFIX], seg_text_start, seg_text_len); // CRC - uint16_t crc = 0xFFFF; - for (int i = 0; i < seg_len - CRC_LEN; i++) - crc = update_crc_ccitt(crc, seg_data[i]); - crc = ~crc; -#if DEBUG - fprintf(stderr, "crc=%04x ~crc=%04x\n", ~crc, crc); -#endif - seg_data[seg_len - 2] = (crc & 0xFF00) >> 8; // HI CRC - seg_data[seg_len - 1] = crc & 0x00FF; // LO CRC + dg.AppendCRC(); #if DEBUG fprintf(stderr, "DL segment:"); - for (int i = 0; i < seg_len; i++) + for (int i = 0; i < seg_data.size(); i++) fprintf(stderr, " %02x", seg_data[i]); fprintf(stderr, "\n"); #endif - return seg_len; + return dg; } -void create_dls_pads(const std::string& text, const int padlen, const uint8_t charset) { - uint8_t seg_data[DLS_SEG_LEN_MAX]; +void create_dls_pads(const std::string& text, int padlen, uint8_t charset) { int xpadlengthmask = get_xpadlengthmask(padlen); dls_pads.clear(); @@ -1125,18 +1115,18 @@ void create_dls_pads(const std::string& text, const int padlen, const uint8_t ch #if DEBUG fprintf(stderr, "Segment number %d\n", seg_index + 1); #endif - int seg_len = dls_get(text, charset, seg_index, seg_data); + DATA_GROUP seg = dls_get(text, charset, seg_index); + bool ci_needed = true; // CI needed only at first data group int dg_len; int used_xpad_len; // distribute the segment over one or more PADs - for (int seg_off = 0; seg_off < seg_len;) { + while (seg.Available()) { dls_pads.push_back(pad_t(padlen + 1)); pad_t &pad = dls_pads.back(); int pad_off = padlen - 1; bool var_size_pad = padlen != SHORT_PAD; - bool ci_needed = seg_off == 0; // CI needed only at first data group if (ci_needed) { dg_len = get_xpadlength(xpadlengthmask); @@ -1146,7 +1136,7 @@ void create_dls_pads(const std::string& text, const int padlen, const uint8_t ch } else { dg_len = used_xpad_len; } - int dg_used = MIN(dg_len, seg_len - seg_off); + int dg_used = MIN(dg_len, seg.Available()); // F-PAD Byte L (CI if needed) @@ -1157,15 +1147,15 @@ void create_dls_pads(const std::string& text, const int padlen, const uint8_t ch // CI (app type 2 = DLS, start of X-PAD data group) if (ci_needed) - pad[pad_off--] = ((var_size_pad ? xpadlengthmask : 0) << 5) | 0x02; + pad[pad_off--] = ((var_size_pad ? xpadlengthmask : 0) << 5) | seg.apptype_start; // CI end marker if (ci_needed && var_size_pad) pad[pad_off--] = 0x00; // segment (part) - for (int i = 0; i < dg_used; i++) - pad[pad_off--] = seg_data[seg_off + i]; + seg.WriteReversed(&pad[pad_off], dg_used); + pad_off -= dg_used; // NULL PADDING std::fill_n(pad.begin(), pad_off + 1, 0x00); @@ -1179,7 +1169,9 @@ void create_dls_pads(const std::string& text, const int padlen, const uint8_t ch fprintf(stderr, " %02x", pad[i]); fprintf(stderr, "\n"); #endif - seg_off += dg_used; + + if (ci_needed) + ci_needed = false; } } #if DEBUG |