FreeCalypso > hg > gsm-codec-lib
view frtest/decode-rb.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 | e0d42e87da96 |
children |
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line source
/* * gsmfr-decode-rb is a "raw basic" decoder: only the basic GSM 06.10 decoder * is applied (no Rx DTX preprocessor), and the output format is raw BE. */ #include <stdio.h> #include <stdint.h> #include <stdlib.h> #include "../libgsmfr2/tw_gsmfr.h" #include "../libtest/binreader.h" #include "../libtest/robewrite.h" main(argc, argv) char **argv; { FILE *binf, *outf; struct gsmfr_0610_state *dec_state; uint8_t frame[BINFILE_MAX_FRAME]; int16_t pcm[160]; int rc; if (argc != 3) { fprintf(stderr, "usage: %s input.gsm output.robe\n", argv[0]); exit(1); } binf = fopen(argv[1], "r"); if (!binf) { perror(argv[1]); exit(1); } outf = fopen(argv[2], "w"); if (!outf) { perror(argv[2]); exit(1); } dec_state = gsmfr_0610_create(); if (!dec_state) { fprintf(stderr, "gsmfr_0610_create() failed!\n"); exit(1); } for (;;) { rc = binfile_read_frame(binf, frame); if (rc < 0) { fprintf(stderr, "error: garbage in %s\n", argv[1]); exit(1); } if (!rc) break; if (frame[0] == 0xBF) { fprintf(stderr, "error: %s contains disallowed BFI\n", argv[1]); exit(1); } if ((frame[0] & 0xF0) != 0xD0) { fprintf(stderr, "error: %s is not in FR codec format\n", argv[1]); exit(1); } gsmfr_0610_decode_frame(dec_state, frame, pcm); write_pcm_to_robe(outf, pcm); } fclose(outf); exit(0); }