FreeCalypso > hg > gsm-codec-lib
annotate amrtest/decode.c @ 485:751f06541fbb
doc/Codec-utils: clarify lack of DHF in gsmfr-decode-rb
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 20 May 2024 01:47:22 +0000 |
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1 /* |
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2 * twamr-decode is a speech decoder utility going from *.amr input |
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3 * to WAV output. It logically replaces amrnb-dec from opencore-amr |
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4 * package. |
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5 */ |
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6 |
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7 #include <stdio.h> |
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8 #include <stdint.h> |
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9 #include <stdlib.h> |
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10 #include <string.h> |
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11 #include <strings.h> |
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12 #include "../libtwamr/tw_amr.h" |
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13 #include "../libtest/wavwriter.h" |
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14 #include "../libtest/pcmwrite.h" |
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15 |
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16 main(argc, argv) |
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17 char **argv; |
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18 { |
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19 FILE *inf; |
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20 void *wav; |
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21 uint8_t frm_in[AMR_IETF_MAX_PL]; |
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22 struct amr_decoder_state *state; |
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23 struct amr_param_frame frame; |
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24 int16_t pcm[160]; |
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25 int rc; |
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26 |
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27 if (argc != 3) { |
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28 fprintf(stderr, "usage: %s input.amr output.wav\n", argv[0]); |
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29 exit(1); |
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30 } |
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31 inf = fopen(argv[1], "r"); |
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32 if (!inf) { |
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33 perror(argv[1]); |
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34 exit(1); |
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35 } |
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36 if (fread(frm_in, 1, AMR_IETF_HDR_LEN, inf) != AMR_IETF_HDR_LEN || |
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37 bcmp(frm_in, amr_file_header_magic, AMR_IETF_HDR_LEN)) { |
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38 fprintf(stderr, "error: %s is not in IETF AMR format\n", |
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39 argv[1]); |
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40 exit(1); |
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41 } |
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42 wav = wav_write_open(argv[2], 8000, 16, 1); |
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43 if (!wav) { |
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44 perror(argv[2]); |
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45 exit(1); |
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46 } |
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47 state = amr_decoder_create(); |
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48 if (!state) { |
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49 perror("amr_decoder_create()"); |
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50 exit(1); |
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51 } |
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52 for (;;) { |
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53 rc = getc(inf); |
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54 if (rc < 0) |
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55 break; |
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56 frm_in[0] = rc; |
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57 rc = amr_ietf_grok_first_octet(frm_in[0]); |
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58 if (rc < 0) { |
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59 inv: fprintf(stderr, "error: %s contains invalid AMR data\n", |
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60 argv[1]); |
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61 exit(1); |
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62 } |
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63 if (rc && fread(frm_in+1, 1, rc, inf) != rc) |
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64 goto inv; |
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65 amr_frame_from_ietf(frm_in, &frame); |
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66 amr_decode_frame(state, &frame, pcm); |
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67 write_pcm_to_wav(wav, pcm); |
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68 } |
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69 wav_write_close(wav); |
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70 exit(0); |
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71 } |