FreeCalypso > hg > gsm-codec-lib
view amrtest/decode.c @ 494:aaf4dec8bee0
libgsmhr1: implement perfect SID detection
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 17 Jun 2024 23:14:19 +0000 |
parents | fe4983b05230 |
children |
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/* * twamr-decode is a speech decoder utility going from *.amr input * to WAV output. It logically replaces amrnb-dec from opencore-amr * package. */ #include <stdio.h> #include <stdint.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include "../libtwamr/tw_amr.h" #include "../libtest/wavwriter.h" #include "../libtest/pcmwrite.h" main(argc, argv) char **argv; { FILE *inf; void *wav; uint8_t frm_in[AMR_IETF_MAX_PL]; struct amr_decoder_state *state; struct amr_param_frame frame; int16_t pcm[160]; int rc; if (argc != 3) { fprintf(stderr, "usage: %s input.amr output.wav\n", argv[0]); exit(1); } inf = fopen(argv[1], "r"); if (!inf) { perror(argv[1]); exit(1); } if (fread(frm_in, 1, AMR_IETF_HDR_LEN, inf) != AMR_IETF_HDR_LEN || bcmp(frm_in, amr_file_header_magic, AMR_IETF_HDR_LEN)) { fprintf(stderr, "error: %s is not in IETF AMR format\n", argv[1]); exit(1); } wav = wav_write_open(argv[2], 8000, 16, 1); if (!wav) { perror(argv[2]); exit(1); } state = amr_decoder_create(); if (!state) { perror("amr_decoder_create()"); exit(1); } for (;;) { rc = getc(inf); if (rc < 0) break; frm_in[0] = rc; rc = amr_ietf_grok_first_octet(frm_in[0]); if (rc < 0) { inv: fprintf(stderr, "error: %s contains invalid AMR data\n", argv[1]); exit(1); } if (rc && fread(frm_in+1, 1, rc, inf) != rc) goto inv; amr_frame_from_ietf(frm_in, &frame); amr_decode_frame(state, &frame, pcm); write_pcm_to_wav(wav, pcm); } wav_write_close(wav); exit(0); }