FreeCalypso > hg > gsm-codec-lib
view frtest/preproc.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 | 18229558c8bf |
children |
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/* * This utility reads an extended-libgsm file that may contain SID frames * and BFI markers, passes it through our preprocessor and writes out * pure libgsm frames. */ #include <stdio.h> #include <stdint.h> #include <stdlib.h> #include "../libgsmfr2/tw_gsmfr.h" #include "../libtest/binreader.h" main(argc, argv) char **argv; { FILE *bini, *bino; struct gsmfr_preproc_state *pp_state; uint8_t frame[BINFILE_MAX_FRAME]; int rc, bfi, taf; if (argc != 3) { fprintf(stderr, "usage: %s input.gsmx output.gsm\n", argv[0]); exit(1); } bini = fopen(argv[1], "r"); if (!bini) { perror(argv[1]); exit(1); } bino = fopen(argv[2], "w"); if (!bino) { perror(argv[2]); exit(1); } pp_state = gsmfr_preproc_create(); if (!pp_state) { fprintf(stderr, "gsmfr_preproc_create() failed!\n"); exit(1); } for (;;) { rc = binfile_read_frame(bini, frame); if (rc < 0) { fprintf(stderr, "error: garbage in %s\n", argv[1]); exit(1); } if (!rc) break; if (frame[0] == 0xBF) { bfi = 1; taf = frame[1] & 1; } else if ((frame[0] & 0xF0) == 0xD0) bfi = 0; else { fprintf(stderr, "error: %s is not in FR codec format\n", argv[1]); exit(1); } if (bfi) gsmfr_preproc_bfi(pp_state, taf, frame); else gsmfr_preproc_good_frame(pp_state, frame); fwrite(frame, 1, 33, bino); } fclose(bino); exit(0); }