FreeCalypso > hg > gsm-codec-lib
view efrtest/decode-r.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 | 01ce75ea1c8e |
children |
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/* * gsmefr-decode-r is like gsmefr-decode, but writes the decoded PCM * output in our "robe" format instead of WAV. */ #include <stdio.h> #include <stdint.h> #include <stdlib.h> #include "../libgsmefr/gsm_efr.h" #include "../libtest/binreader.h" #include "../libtest/robewrite.h" main(argc, argv) char **argv; { FILE *binf, *outf; struct EFR_decoder_state *state; uint8_t frame[BINFILE_MAX_FRAME]; int16_t pcm[160]; int rc, bfi, taf; if (argc != 3) { fprintf(stderr, "usage: %s input.gsmx 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); } state = EFR_decoder_create(); if (!state) { perror("EFR_decoder_create()"); 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) { bfi = 1; taf = frame[1] & 1; } else if ((frame[0] & 0xF0) == 0xC0) bfi = 0; else { fprintf(stderr, "error: %s is not in EFR codec format\n", argv[1]); exit(1); } if (bfi) EFR_decode_bfi_nodata(state, taf, pcm); else EFR_decode_frame(state, frame, 0, 0, pcm); write_pcm_to_robe(outf, pcm); } fclose(outf); exit(0); }