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annotate libtwamr/ietf_out.c @ 585:3c6bf0d26ee7 default tip

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TW-TS-005 reader: fix maximum line length bug TW-TS-005 section 4.1 states: The maximum allowed length of each line is 80 characters, not including the OS-specific newline encoding. The implementation of this line length limit in the TW-TS-005 hex file reader function in the present suite was wrong, such that lines of the full maximum length could not be read. Fix it. Note that this bug affects comment lines too, not just actual RTP payloads. Neither Annex A nor Annex B features an RTP payload format that goes to the maximum of 40 bytes, but if a comment line goes to the maximum allowed length of 80 characters not including the terminating newline, the bug will be triggered, necessitating the present fix.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 25 Feb 2025 07:49:28 +0000
parents ebe499058c63
children
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441
ebe499058c63 libtwamr: implement API functions for RFC 4867 I/O
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1 /*
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2 * The function implemented in this module is responsible for turning
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3 * struct amr_param_frame (encoder output) into an RFC 4867 payload.
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4 */
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5
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6 #include <stdint.h>
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7 #include "tw_amr.h"
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8 #include "typedef.h"
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9 #include "namespace.h"
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10 #include "cnst.h"
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11 #include "int_defs.h"
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12 #include "if1_func.h"
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13
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14 static const uint8_t total_bytes_per_ft[9] =
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15 {13, 14, 16, 18, 20, 21, 27, 32, 6};
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16
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17 static const uint8_t first_octet_per_ft[9] =
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18 {0x04, 0x0C, 0x14, 0x1C, 0x24, 0x2C, 0x34, 0x3C, 0x44};
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19
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20 unsigned amr_frame_to_ietf(const struct amr_param_frame *frame, uint8_t *bytes)
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21 {
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22 Word16 serial[MAX_SERIAL_SIZE];
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23 Word16 sti;
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24 enum Mode ft;
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25
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26 switch (frame->type) {
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27 case TX_SPEECH_GOOD:
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28 ft = frame->mode;
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29 break;
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30 case TX_SID_FIRST:
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31 ft = MRDTX;
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32 sti = 0;
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33 break;
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34 case TX_SID_UPDATE:
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35 ft = MRDTX;
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36 sti = 1;
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37 break;
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38 case TX_NO_DATA:
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39 default:
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40 bytes[0] = 0x7C;
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41 return 1;
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42 }
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43 Prm2bits(ft, frame->param, serial);
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44 bytes[0] = first_octet_per_ft[ft];
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45 if1_pack_bytes(ft, serial, bytes + 1);
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46 if (ft == MRDTX) {
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47 if (sti)
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48 bytes[5] |= 0x10;
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49 if (frame->mode & 1)
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50 bytes[5] |= 0x08;
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51 if (frame->mode & 2)
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52 bytes[5] |= 0x04;
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53 if (frame->mode & 4)
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54 bytes[5] |= 0x02;
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55 }
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56 return total_bytes_per_ft[ft];
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57 }