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comparison amrefr/tseq-dec.c @ 437:3eadaef8b28f

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implement amrefr-tseq-dec test program
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 08 May 2024 23:03:28 +0000
parents efrtest/etsi-dec.c@9f354d2aea13
children
comparison
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436:e80632ccb745 437:3eadaef8b28f
1 /*
2 * amrefr-tseq-dec is a test program for our libtwamr-based "alternative EFR"
3 * decoder: it functions just like gsmefr-etsi-dec, but uses libtwamr as
4 * the decoder engine instead of libgsmefr. Libgsmefr functions are still
5 * used for frame unpacking, but not for actual decoding. Note that there is
6 * no DTX support in this version, and the *.dec test sequence being decoded
7 * must have SID=0 in every frame. As a simplification, we also require BFI=0:
8 * while it is possible to feed BFI=1 frames to libtwamr decoder (convert to
9 * RX_SPEECH_BAD), such support is not needed for decoding the test sequences
10 * in amr122_efr.zip, hence we've omitted it for simplicity.
11 *
12 * The byte order is LE by default or BE with -b option.
13 */
14
15 #include <stdio.h>
16 #include <stdint.h>
17 #include <stdlib.h>
18 #include <string.h>
19 #include <strings.h>
20 #include "../libgsmefr/gsm_efr.h"
21 #include "../libtwamr/tw_amr.h"
22 #include "../efrtest/etsi.h"
23
24 main(argc, argv)
25 char **argv;
26 {
27 int big_endian;
28 char *infname, *outfname;
29 FILE *inf, *outf;
30 struct amr_decoder_state *state;
31 unsigned frame_no;
32 uint8_t input_bits[ETSI_DEC_NWORDS], efr_frame[EFR_RTP_FRAME_LEN];
33 struct amr_param_frame amr_frame;
34 int16_t pcm[160];
35 int rc;
36
37 if (argc == 3 && argv[1][0] != '-') {
38 big_endian = 0;
39 infname = argv[1];
40 outfname = argv[2];
41 } else if (argc == 4 && !strcmp(argv[1], "-b")) {
42 big_endian = 1;
43 infname = argv[2];
44 outfname = argv[3];
45 } else {
46 fprintf(stderr, "usage: %s [-b] input.dec output.out\n",
47 argv[0]);
48 exit(1);
49 }
50 inf = fopen(infname, "r");
51 if (!inf) {
52 perror(infname);
53 exit(1);
54 }
55 outf = fopen(outfname, "w");
56 if (!outf) {
57 perror(outfname);
58 exit(1);
59 }
60 state = amr_decoder_create();
61 if (!state) {
62 perror("amr_decoder_create()");
63 exit(1);
64 }
65 amr_frame.type = RX_SPEECH_GOOD;
66 amr_frame.mode = 0x87;
67 for (frame_no = 0; ; frame_no++) {
68 rc = read_etsi_bits(inf, big_endian, input_bits,
69 ETSI_DEC_NWORDS, infname);
70 if (!rc)
71 break;
72 if (input_bits[0]) {
73 fprintf(stderr,
74 "error in %s frame #%u: BFI != 0 not supported\n",
75 infname, frame_no);
76 exit(1);
77 }
78 bits2frame(input_bits + 1, efr_frame, infname, frame_no);
79 if (input_bits[245]) {
80 fprintf(stderr,
81 "error in %s frame #%u: SID != 0 not supported\n",
82 infname, frame_no);
83 exit(1);
84 }
85 EFR_frame2params(efr_frame, amr_frame.param);
86 amr_decode_frame(state, &amr_frame, pcm);
87 if (big_endian)
88 write_pcm_be(outf, pcm);
89 else
90 write_pcm_le(outf, pcm);
91 }
92 fclose(outf);
93 exit(0);
94 }