mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-07 13:30:03 -05:00
5effc83479
FSF addresses used in PA sources are no longer valid and rpmlint generates numerous warnings during packaging because of this. This patch changes all FSF addresses to FSF web page according to the GPL how-to: https://www.gnu.org/licenses/gpl-howto.en.html Done automatically by sed-ing through sources.
118 lines
3.8 KiB
C
118 lines
3.8 KiB
C
/***
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This file is part of PulseAudio.
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Copyright 2010 Arun Raghavan <arun.raghavan@collabora.co.uk>
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Contributor: Wim Taymans <wim.taymans@gmail.com>
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The actual implementation is taken from the sources at
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http://andreadrian.de/intercom/ - for the license, look for
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adrian-license.txt in the same directory as this file.
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <pulse/xmalloc.h>
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#include <pulsecore/modargs.h>
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#include "echo-cancel.h"
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/* should be between 10-20 ms */
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#define DEFAULT_FRAME_SIZE_MS 20
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static const char* const valid_modargs[] = {
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"frame_size_ms",
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NULL
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};
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static void pa_adrian_ec_fixate_spec(pa_sample_spec *rec_ss, pa_channel_map *rec_map,
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pa_sample_spec *play_ss, pa_channel_map *play_map,
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pa_sample_spec *out_ss, pa_channel_map *out_map) {
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out_ss->format = PA_SAMPLE_S16NE;
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out_ss->channels = 1;
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pa_channel_map_init_mono(out_map);
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*play_ss = *out_ss;
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*play_map = *out_map;
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*rec_ss = *out_ss;
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*rec_map = *out_map;
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}
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bool pa_adrian_ec_init(pa_core *c, pa_echo_canceller *ec,
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pa_sample_spec *rec_ss, pa_channel_map *rec_map,
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pa_sample_spec *play_ss, pa_channel_map *play_map,
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pa_sample_spec *out_ss, pa_channel_map *out_map,
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uint32_t *nframes, const char *args) {
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int rate, have_vector = 0;
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uint32_t frame_size_ms;
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pa_modargs *ma;
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if (!(ma = pa_modargs_new(args, valid_modargs))) {
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pa_log("Failed to parse submodule arguments.");
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goto fail;
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}
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frame_size_ms = DEFAULT_FRAME_SIZE_MS;
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if (pa_modargs_get_value_u32(ma, "frame_size_ms", &frame_size_ms) < 0 || frame_size_ms < 1 || frame_size_ms > 200) {
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pa_log("Invalid frame_size_ms specification");
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goto fail;
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}
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pa_adrian_ec_fixate_spec(rec_ss, rec_map, play_ss, play_map, out_ss, out_map);
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rate = out_ss->rate;
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*nframes = (rate * frame_size_ms) / 1000;
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ec->params.priv.adrian.blocksize = (*nframes) * pa_frame_size(out_ss);
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pa_log_debug ("Using nframes %d, blocksize %u, channels %d, rate %d", *nframes, ec->params.priv.adrian.blocksize, out_ss->channels, out_ss->rate);
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/* For now we only support SSE */
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if (c->cpu_info.cpu_type == PA_CPU_X86 && (c->cpu_info.flags.x86 & PA_CPU_X86_SSE))
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have_vector = 1;
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ec->params.priv.adrian.aec = AEC_init(rate, have_vector);
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if (!ec->params.priv.adrian.aec)
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goto fail;
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pa_modargs_free(ma);
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return true;
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fail:
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if (ma)
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pa_modargs_free(ma);
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return false;
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}
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void pa_adrian_ec_run(pa_echo_canceller *ec, const uint8_t *rec, const uint8_t *play, uint8_t *out) {
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unsigned int i;
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for (i = 0; i < ec->params.priv.adrian.blocksize; i += 2) {
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/* We know it's S16NE mono data */
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int r = *(int16_t *)(rec + i);
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int p = *(int16_t *)(play + i);
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*(int16_t *)(out + i) = (int16_t) AEC_doAEC(ec->params.priv.adrian.aec, r, p);
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}
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}
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void pa_adrian_ec_done(pa_echo_canceller *ec) {
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if (ec->params.priv.adrian.aec) {
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AEC_done(ec->params.priv.adrian.aec);
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ec->params.priv.adrian.aec = NULL;
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}
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}
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