code.delx.au - pulseaudio/blob - src/modules/echo-cancel/echo-cancel.h

   1 /***
   2     This file is part of PulseAudio.
   3
   4     Copyright 2010 Arun Raghavan <arun.raghavan@collabora.co.uk>
   5
   6     PulseAudio is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU Lesser General Public License as published
   8     by the Free Software Foundation; either version 2.1 of the License,
   9     or (at your option) any later version.
  10
  11     PulseAudio is distributed in the hope that it will be useful, but
  12     WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14     General Public License for more details.
  15
  16     You should have received a copy of the GNU Lesser General Public License
  17     along with PulseAudio; if not, write to the Free Software
  18     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19     USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <pulse/sample.h>
  27 #include <pulse/channelmap.h>
  28 #include <pulsecore/core.h>
  29 #include <pulsecore/macro.h>
  30
  31 #include <speex/speex_echo.h>
  32 #include <speex/speex_preprocess.h>
  33 #include "adrian.h"
  34
  35 /* Common data structures */
  36
  37 typedef struct pa_echo_canceller_params pa_echo_canceller_params;
  38
  39 struct pa_echo_canceller_params {
  40     union {
  41         struct {
  42             SpeexEchoState *state;
  43         } speex;
  44         struct {
  45             uint32_t blocksize;
  46             AEC *aec;
  47         } adrian;
  48         /* each canceller-specific structure goes here */
  49     } priv;
  50 };
  51
  52 typedef struct pa_echo_canceller pa_echo_canceller;
  53
  54 struct pa_echo_canceller {
  55     pa_bool_t   (*init)                 (pa_core *c,
  56                                          pa_echo_canceller *ec,
  57                                          pa_sample_spec *source_ss,
  58                                          pa_channel_map *source_map,
  59                                          pa_sample_spec *sink_ss,
  60                                          pa_channel_map *sink_map,
  61                                          uint32_t *blocksize,
  62                                          const char *args);
  63     void        (*run)                  (pa_echo_canceller *ec, const uint8_t *rec, const uint8_t *play, uint8_t *out);
  64     void        (*done)                 (pa_echo_canceller *ec);
  65
  66     pa_echo_canceller_params params;
  67
  68     pa_bool_t agc;
  69     pa_bool_t denoise;
  70     pa_bool_t echo_suppress;
  71     SpeexPreprocessState *pp_state;
  72 };
  73
  74 /* Speex canceller functions */
  75 pa_bool_t pa_speex_ec_init(pa_core *c, pa_echo_canceller *ec,
  76                            pa_sample_spec *source_ss, pa_channel_map *source_map,
  77                            pa_sample_spec *sink_ss, pa_channel_map *sink_map,
  78                            uint32_t *blocksize, const char *args);
  79 void pa_speex_ec_run(pa_echo_canceller *ec, const uint8_t *rec, const uint8_t *play, uint8_t *out);
  80 void pa_speex_ec_done(pa_echo_canceller *ec);
  81
  82 /* Adrian Andre's echo canceller */
  83 pa_bool_t pa_adrian_ec_init(pa_core *c, pa_echo_canceller *ec,
  84                            pa_sample_spec *source_ss, pa_channel_map *source_map,
  85                            pa_sample_spec *sink_ss, pa_channel_map *sink_map,
  86                            uint32_t *blocksize, const char *args);
  87 void pa_adrian_ec_run(pa_echo_canceller *ec, const uint8_t *rec, const uint8_t *play, uint8_t *out);
  88 void pa_adrian_ec_done(pa_echo_canceller *ec);