FreeCalypso > hg > gsm-codec-lib
view amrefr/encode-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 | 0c4e1bc06740 |
children |
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/* * amrefr-encode-r is a counterpart to gsmefr-encode-r, implementing * "alternative EFR" by way of libtwamr. Unlike standard gsmefr-encode-r, * there is no -d option and no DTX support in this version. */ #include <stdio.h> #include <stdint.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include "../libgsmefr/gsm_efr.h" #include "../libtwamr/tw_amr.h" #include "../libtest/roberead.h" main(argc, argv) char **argv; { FILE *inf, *binf; struct amr_encoder_state *state; int16_t pcm[160]; struct amr_param_frame amr_frame; uint8_t efr_frame[EFR_RTP_FRAME_LEN]; int rc; if (argc != 3) { fprintf(stderr, "usage: %s input.robe output.gsmx\n", argv[0]); exit(1); } inf = fopen(argv[1], "r"); if (!inf) { perror(argv[1]); exit(1); } binf = fopen(argv[2], "w"); if (!binf) { perror(argv[2]); exit(1); } state = amr_encoder_create(0, 0); if (!state) { perror("amr_encoder_create()"); exit(1); } for (;;) { rc = robe_get_pcm_block(inf, pcm); if (!rc) break; amr_encode_frame(state, MR122, pcm, &amr_frame); amr_dhf_subst_efr2(&amr_frame, pcm); EFR_params2frame(amr_frame.param, efr_frame); fwrite(efr_frame, 1, sizeof efr_frame, binf); } fclose(binf); exit(0); }