diff options
author | Benny Prijono <bennylp@teluu.com> | 2006-02-19 18:38:37 +0000 |
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committer | Benny Prijono <bennylp@teluu.com> | 2006-02-19 18:38:37 +0000 |
commit | ca9c14f791178caba306b47766b26bbbed8a34a8 (patch) | |
tree | 6999905c809e96e2ae44a04f1bb1476439c8985a | |
parent | 51f0bc5a46378786d98caf84df2cf31bb169e45b (diff) |
Putting vad template
git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@202 74dad513-b988-da41-8d7b-12977e46ad98
-rw-r--r-- | pjmedia/build/pjmedia.dsp | 8 | ||||
-rw-r--r-- | pjmedia/include/pjmedia/vad.h | 83 | ||||
-rw-r--r-- | pjmedia/src/pjmedia/vad.c | 42 |
3 files changed, 133 insertions, 0 deletions
diff --git a/pjmedia/build/pjmedia.dsp b/pjmedia/build/pjmedia.dsp index f8434599..0f87dc57 100644 --- a/pjmedia/build/pjmedia.dsp +++ b/pjmedia/build/pjmedia.dsp @@ -147,6 +147,10 @@ SOURCE=..\src\pjmedia\session.c SOURCE=..\src\pjmedia\stream.c
# End Source File
+# Begin Source File
+
+SOURCE=..\src\pjmedia\vad.c
+# End Source File
# End Group
# Begin Group "Header Files"
@@ -211,6 +215,10 @@ SOURCE=..\include\pjmedia\stream.h SOURCE=..\include\pjmedia\types.h
# End Source File
+# Begin Source File
+
+SOURCE=..\include\pjmedia\vad.h
+# End Source File
# End Group
# Begin Group "PortAudio"
diff --git a/pjmedia/include/pjmedia/vad.h b/pjmedia/include/pjmedia/vad.h new file mode 100644 index 00000000..4788799b --- /dev/null +++ b/pjmedia/include/pjmedia/vad.h @@ -0,0 +1,83 @@ +/* $Id$ */ +/* + * Copyright (C) 2003-2006 Benny Prijono <benny@prijono.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#ifndef __PJMEDIA_VAD_H__ +#define __PJMEDIA_VAD_H__ + + +/** + * @file vad.h + * @brief Voice Activity Detector. + */ +#include <pjmedia/types.h> + + +/** + * Opaque data type for pjmedia vad. + */ +typedef struct pjmedia_vad pjmedia_vad; + + +/** + * Create voice activity detector with default settings. The default settings + * are to perform adaptive silence detection, which adjusts the noise level + * dynamically based on current input level. + * + * @param pool Pool for allocating the structure. + * @param p_vad Pointer to receive the VAD instance. + * + * @return PJ_SUCCESS on success. + */ +PJ_DECL(pj_status_t) pjmedia_vad_create( pj_pool_t *pool, + pjmedia_vad **p_vad ); + + +/** + * Calculate average signal level for the given samples. + * + * @param samples Pointer to 16-bit PCM samples. + * @param count Number of samples in the input. + * + * @return The average signal level, which simply is total level + * divided by number of samples. + */ +PJ_DECL(pj_uint32_t) pjmedia_vad_calc_avg_signal_level( pj_int16_t samples[], + pj_size_t count ); + + +/** + * Perform voice activity detection on the given input samples. + * + * @param vad The VAD instance. + * @param samples Pointer to 16-bit PCM input samples. + * @param count Number of samples in the input. + * @param p_silence Pointer to receive the silence detection result. + * Non-zero value indicates that that input is considered + * as silence. + * + * @return PJ_SUCCESS on success. + */ +PJ_DECL(pj_status_t) pjmedia_vad_detect_silence( pjmedia_vad *vad, + pj_int16_t samples[], + pj_size_t count, + pj_bool_t *p_silence); + + + +#endif /* __PJMEDIA_VAD_H__ */ + diff --git a/pjmedia/src/pjmedia/vad.c b/pjmedia/src/pjmedia/vad.c new file mode 100644 index 00000000..399879a7 --- /dev/null +++ b/pjmedia/src/pjmedia/vad.c @@ -0,0 +1,42 @@ +/* $Id$ */ +/* + * Copyright (C) 2003-2006 Benny Prijono <benny@prijono.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include <pjmedia/vad.h> +#include <pjmedia/errno.h> + + +PJ_DEF(pj_status_t) pjmedia_vad_create( pj_pool_t *pool, + pjmedia_vad **p_vad) +{ + return PJ_EINVALIDOP; +} + +PJ_DEF(pj_uint32_t) pjmedia_vad_calc_avg_signal_level(pj_int16_t samples[], + pj_size_t count) +{ + return PJ_EINVALIDOP; +} + +PJ_DEF(pj_status_t) pjmedia_vad_detect_silence( pjmedia_vad *vad, + pj_int16_t samples[], + pj_size_t count, + pj_bool_t *p_silence) +{ + return PJ_EINVALIDOP; +} + |