FreeCalypso > hg > gsm-codec-lib
view frtest/encode.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 | f00925b533b7 |
children |
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/* * This file is the main module for gsmfr-encode utility. */ #include <stdio.h> #include <stdint.h> #include <stdlib.h> #include "../libgsmfr2/tw_gsmfr.h" #include "../libtest/wavreader.h" #include "../libtest/wavrdhelp.h" main(argc, argv) char **argv; { void *wav; FILE *binf; struct gsmfr_0610_state *enc_state; int16_t pcm[160]; uint8_t frame[33]; int rc; if (argc != 3) { fprintf(stderr, "usage: %s input.wav output.gsm\n", argv[0]); exit(1); } 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 */ binf = fopen(argv[2], "w"); if (!binf) { perror(argv[2]); exit(1); } enc_state = gsmfr_0610_create(); if (!enc_state) { fprintf(stderr, "gsmfr_0610_create() failed!\n"); exit(1); } for (;;) { rc = wavrd_get_pcm_block(wav, pcm); if (!rc) break; gsmfr_0610_encode_frame(enc_state, pcm, frame); fwrite(frame, 1, sizeof frame, binf); } fclose(binf); exit(0); }