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annotate libtwamr/enc_main.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 4c9222d95647
children
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2a094af3d384 libtwamr: implement encoder top level
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1 /*
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2 * This C module is the top level entity for our stateful encoder engine.
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3 */
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4
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5 #include <stdint.h>
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6 #include <stdlib.h>
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7 #include "tw_amr.h"
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8 #include "namespace.h"
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9 #include "typedef.h"
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10 #include "cnst.h"
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11 #include "cod_amr.h"
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12 #include "pre_proc.h"
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13 #include "sid_sync.h"
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14 #include "e_homing.h"
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15
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16 struct amr_encoder_state {
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17 cod_amrState cod;
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18 Pre_ProcessState pre;
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19 sid_syncState sid;
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20 };
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21
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22 struct amr_encoder_state *amr_encoder_create(int dtx, int use_vad2)
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23 {
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24 struct amr_encoder_state *st;
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25
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26 st = malloc(sizeof(struct amr_encoder_state));
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27 if (st)
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28 amr_encoder_reset(st, dtx, use_vad2);
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29 return st;
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30 }
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31
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32 void amr_encoder_reset(struct amr_encoder_state *st, int dtx, int use_vad2)
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33 {
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34 cod_amr_reset(&st->cod, dtx, use_vad2);
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35 Pre_Process_reset(&st->pre);
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36 sid_sync_reset(&st->sid);
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37 }
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38
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39 void amr_encode_frame(struct amr_encoder_state *st, enum Mode mode,
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40 const int16_t *pcm, struct amr_param_frame *frame)
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41 {
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42 Word16 new_speech[L_FRAME], syn[L_FRAME];
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43 enum Mode used_mode;
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44 enum TXFrameType tx_type;
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45 Word16 i;
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46
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47 /* input */
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48 for (i = 0; i < L_FRAME; i++)
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49 new_speech[i] = pcm[i] & 0xFFF8;
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50 Pre_Process(&st->pre, new_speech, L_FRAME);
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51
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52 /* main process */
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53 cod_amr(&st->cod, mode, new_speech, frame->param, &used_mode, syn);
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54 sid_sync(&st->sid, used_mode, &tx_type);
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55 frame->type = tx_type;
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56 frame->mode = mode;
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57
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58 /* encoder homing */
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59 if (encoder_homing_frame_test(pcm))
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60 amr_encoder_reset(st, st->cod.dtx, st->cod.vadSt.use_vad2);
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61 }