/*** Copyright 2012 Peter Meerwald PulseAudio is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. PulseAudio is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. ***/ #ifdef HAVE_CONFIG_H #include #endif #include PA_C_DECL_BEGIN #include #include #include "echo-cancel.h" PA_C_DECL_END bool pa_null_ec_init(pa_core *c, pa_echo_canceller *ec, pa_sample_spec *rec_ss, pa_channel_map *rec_map, pa_sample_spec *play_ss, pa_channel_map *play_map, pa_sample_spec *out_ss, pa_channel_map *out_map, uint32_t *nframes, const char *args) { char strss_source[PA_SAMPLE_SPEC_SNPRINT_MAX]; char strss_sink[PA_SAMPLE_SPEC_SNPRINT_MAX]; *nframes = 256; ec->params.null.out_ss = *out_ss; *rec_ss = *out_ss; *rec_map = *out_map; pa_log_debug("null AEC: nframes=%u, sample spec source=%s, sample spec sink=%s", *nframes, pa_sample_spec_snprint(strss_source, sizeof(strss_source), out_ss), pa_sample_spec_snprint(strss_sink, sizeof(strss_sink), play_ss)); return true; } void pa_null_ec_run(pa_echo_canceller *ec, const uint8_t *rec, const uint8_t *play, uint8_t *out) { /* The null implementation simply copies the recorded buffer to the output buffer and ignores the play buffer. */ memcpy(out, rec, 256 * pa_frame_size(&ec->params.null.out_ss)); } void pa_null_ec_done(pa_echo_canceller *ec) { }