FreeCalypso > hg > gsm-codec-lib
changeset 542:f2d0f2f15d5f
libgsmefr: add wrapper for TW-TS-001 RTP input
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sat, 28 Sep 2024 06:38:08 +0000 |
parents | 23656d874524 |
children | 53d3f48af107 |
files | libgsmefr/Makefile libgsmefr/dec_rtp_in.c libgsmefr/gsm_efr.h |
diffstat | 3 files changed, 57 insertions(+), 8 deletions(-) [+] |
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--- a/libgsmefr/Makefile Sat Sep 28 06:00:34 2024 +0000 +++ b/libgsmefr/Makefile Sat Sep 28 06:38:08 2024 +0000 @@ -1,13 +1,13 @@ OBJS= agc.o autocorr.o az_lsp.o basicops.o bfi_nodata.o c1035pf.o cod_12k2.o \ convolve.o d1035pf.o d_gains.o d_homing.o d_plsf_5.o dec_12k2.o \ - dec_create.o dec_lag6.o dec_main.o dec_wrap.o dhf.o dtx_common.o \ - dtx_dec.o dtx_enc.o e_homing.o enc_create.o enc_lag6.o enc_main.o \ - enc_wrap.o frame2params.o g_code.o g_pitch.o int_lpc.o inter_6.o \ - inv_sqrt.o lag_wind.o levinson.o log2.o lsp_az.o lsp_lsf.o oper_32b.o \ - params2frame.o pitch_f6.o pitch_ol.o pow2.o pre_proc.o pred_lt6.o \ - preemph.o pstfilt2.o q_gains.o q_plsf5_tab.o q_plsf_5.o reorder.o \ - residu.o sid_class.o sid_insert.o syn_filt.o tls_flags.o vad.o \ - weight_a.o + dec_create.o dec_lag6.o dec_main.o dec_rtp_in.o dec_wrap.o dhf.o \ + dtx_common.o dtx_dec.o dtx_enc.o e_homing.o enc_create.o enc_lag6.o \ + enc_main.o enc_wrap.o frame2params.o g_code.o g_pitch.o int_lpc.o \ + inter_6.o inv_sqrt.o lag_wind.o levinson.o log2.o lsp_az.o lsp_lsf.o \ + oper_32b.o params2frame.o pitch_f6.o pitch_ol.o pow2.o pre_proc.o \ + pred_lt6.o preemph.o pstfilt2.o q_gains.o q_plsf5_tab.o q_plsf_5.o \ + reorder.o residu.o sid_class.o sid_insert.o syn_filt.o tls_flags.o \ + vad.o weight_a.o HDRS= basic_op.h cnst.h codec.h d_homing.h dec_state.h dtx.h dtx_defs.h \ e_homing.h enc_state.h gains_tb.h gsm_efr.h memops.h namespace.h \ no_count.h oper_32b.h q_plsf5_tab.h sig_proc.h typedef.h vad.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libgsmefr/dec_rtp_in.c Sat Sep 28 06:38:08 2024 +0000 @@ -0,0 +1,47 @@ +/* + * This module implements a wrapper around the main processing functions + * of our full decoder, handling RTP input per TW-TS-001. + */ + +#include <stdint.h> +#include "gsm_efr.h" + +int EFR_decode_rtp(struct EFR_decoder_state *st, const uint8_t *rtp_pl, + unsigned rtp_pl_len, int16_t *pcm) +{ + switch (rtp_pl_len) { + case 0: + /* BFI-no-data, but not an invalid RTP input per se */ + EFR_decode_bfi_nodata(st, 0, pcm); + return 0; + case 1: + if ((rtp_pl[0] & 0xF6) != 0xE6) + goto bad_rtp_input; + /* TW-TS-001 No_Data frame */ + EFR_decode_bfi_nodata(st, rtp_pl[0] & 1, pcm); + return 0; + case EFR_RTP_FRAME_LEN: + if ((rtp_pl[0] & 0xF0) != 0xC0) + goto bad_rtp_input; + /* basic RTP format */ + EFR_decode_frame(st, rtp_pl, 0, 0, pcm); + return 0; + case EFR_RTP_FRAME_LEN+1: + if ((rtp_pl[0] & 0xF4) != 0xE0) + goto bad_rtp_input; + if ((rtp_pl[1] & 0xF0) != 0xC0) + goto bad_rtp_input; + /* extended RTP format (TW-TS-001) */ + EFR_decode_frame(st, rtp_pl + 1, (rtp_pl[0] & 2) >> 1, + rtp_pl[0] & 1, pcm); + return 0; + default: + bad_rtp_input: + /* + * Treat it like BFI-no-data, and tell the caller + * that we received an invalid RTP payload. + */ + EFR_decode_bfi_nodata(st, 0, pcm); + return -1; + } +}
--- a/libgsmefr/gsm_efr.h Sat Sep 28 06:00:34 2024 +0000 +++ b/libgsmefr/gsm_efr.h Sat Sep 28 06:38:08 2024 +0000 @@ -43,6 +43,8 @@ int bfi, int taf, int16_t *pcm); extern void EFR_decode_bfi_nodata(struct EFR_decoder_state *st, int taf, int16_t *pcm); +extern int EFR_decode_rtp(struct EFR_decoder_state *st, const uint8_t *rtp_pl, + unsigned rtp_pl_len, int16_t *pcm); /* stateless utility functions */