FreeCalypso > hg > gsm-codec-lib
view miscutil/wav2raw.c @ 477:4c9222d95647
libtwamr encoder: always emit frame->mode = mode;
In the original implementation of amr_encode_frame(), the 'mode' member
of the output struct was set to 0xFF if the output frame type is TX_NO_DATA.
This design was made to mimic the mode field (16-bit word) being set to
0xFFFF (or -1) in 3GPP test sequence format - but nothing actually depends
on this struct member being set in any way, and amr_frame_to_tseq()
generates the needed 0xFFFF on its own, based on frame->type being equal
to TX_NO_DATA.
It is simpler and more efficient to always set frame->mode to the actual
encoding mode in amr_encode_frame(), and this new behavior has already
been documented in doc/AMR-library-API description in anticipation of
the present change.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sat, 18 May 2024 22:30:42 +0000 |
parents | 578fdedf4327 |
children |
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/* * This program reads a 16-bit linear PCM speech recording in WAV format * and converts it to raw format, either BE or LE. */ #include <stdio.h> #include <stdint.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include "../libtest/wavreader.h" #include "../libtest/wavrdhelp.h" main(argc, argv) char **argv; { int big_endian; void *wav; FILE *outf; int16_t pcm[160], samp; uint8_t bytes[320], *dp; int cc, rc, i; if (argc != 4) { usage: fprintf(stderr, "usage: %s input.wav output.raw be|le\n", argv[0]); exit(1); } if (!strcmp(argv[3], "be")) big_endian = 1; else if (!strcmp(argv[3], "le")) big_endian = 0; else goto usage; wav = wav_read_open(argv[1]); if (!wav) { perror(argv[1]); exit(1); } rc = wavrd_check_header(wav, argv[1]); if (rc < 0) exit(1); /* error msg already printed */ outf = fopen(argv[2], "w"); if (!outf) { perror(argv[2]); exit(1); } for (;;) { cc = wavrd_get_pcm_block(wav, pcm); if (!cc) break; dp = bytes; for (i = 0; i < cc; i++) { samp = pcm[i]; if (big_endian) { *dp++ = (samp >> 8) & 0xFF; *dp++ = samp & 0xFF; } else { *dp++ = samp & 0xFF; *dp++ = (samp >> 8) & 0xFF; } } fwrite(bytes, 2, cc, outf); } fclose(outf); exit(0); }