diff options
author | wm4 <wm4@nowhere> | 2012-11-05 17:02:04 +0100 |
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committer | wm4 <wm4@nowhere> | 2012-11-12 20:06:14 +0100 |
commit | d4bdd0473d6f43132257c9fb3848d829755167a3 (patch) | |
tree | 8021c2f7da1841393c8c832105e20cd527826d6c /audio/filter/af_karaoke.c | |
parent | bd48deba77bd5582c5829d6fe73a7d2571088aba (diff) | |
download | mpv-d4bdd0473d6f43132257c9fb3848d829755167a3.tar.bz2 mpv-d4bdd0473d6f43132257c9fb3848d829755167a3.tar.xz |
Rename directories, move files (step 1 of 2) (does not compile)
Tis drops the silly lib prefixes, and attempts to organize the tree in
a more logical way. Make the top-level directory less cluttered as
well.
Renames the following directories:
libaf -> audio/filter
libao2 -> audio/out
libvo -> video/out
libmpdemux -> demux
Split libmpcodecs:
vf* -> video/filter
vd*, dec_video.* -> video/decode
mp_image*, img_format*, ... -> video/
ad*, dec_audio.* -> audio/decode
libaf/format.* is moved to audio/ - this is similar to how mp_image.*
is located in video/.
Move most top-level .c/.h files to core. (talloc.c/.h is left on top-
level, because it's external.) Park some of the more annoying files
in compat/. Some of these are relicts from the time mplayer used
ffmpeg internals.
sub/ is not split, because it's too much of a mess (subtitle code is
mixed with OSD display and rendering).
Maybe the organization of core is not ideal: it mixes playback core
(like mplayer.c) and utility helpers (like bstr.c/h). Should the need
arise, the playback core will be moved somewhere else, while core
contains all helper and common code.
Diffstat (limited to 'audio/filter/af_karaoke.c')
-rw-r--r-- | audio/filter/af_karaoke.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/audio/filter/af_karaoke.c b/audio/filter/af_karaoke.c new file mode 100644 index 0000000000..965eb8f40d --- /dev/null +++ b/audio/filter/af_karaoke.c @@ -0,0 +1,98 @@ +/* + * simple voice removal filter + * + * copyright (c) 2006 Reynaldo H. Verdejo Pinochet + * Based on code by Alex Beregszaszi for his 'center' filter. + * + * This file is part of MPlayer. + * + * MPlayer 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. + * + * MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "af.h" + +// Data for specific instances of this filter + +// Initialization and runtime control +static int control(struct af_instance* af, int cmd, void* arg) +{ + switch(cmd){ + case AF_CONTROL_REINIT: + af->data->rate = ((struct mp_audio*)arg)->rate; + af->data->nch = ((struct mp_audio*)arg)->nch; + af->data->format= AF_FORMAT_FLOAT_NE; + af->data->bps = 4; + return af_test_output(af,(struct mp_audio*)arg); + } + return AF_UNKNOWN; +} + +// Deallocate memory +static void uninit(struct af_instance* af) +{ + free(af->data); +} + +// Filter data through filter +static struct mp_audio* play(struct af_instance* af, struct mp_audio* data) +{ + struct mp_audio* c = data; // Current working data + float* a = c->audio; // Audio data + int len = c->len/4; // Number of samples in current audio block + int nch = c->nch; // Number of channels + register int i; + + /* + FIXME1 add a low band pass filter to avoid suppressing + centered bass/drums + FIXME2 better calculated* attenuation factor + */ + + for(i=0;i<len;i+=nch) + { + a[i] = (a[i] - a[i+1]) * 0.7; + a[i+1]=a[i]; + } + + return c; +} + +// Allocate memory and set function pointers +static int af_open(struct af_instance* af){ + af->control = control; + af->uninit = uninit; + af->play = play; + af->mul = 1; + af->data = calloc(1,sizeof(struct mp_audio)); + + if(af->data == NULL) + return AF_ERROR; + + return AF_OK; +} + +// Description of this filter +struct af_info af_info_karaoke = { + "Simple karaoke/voice-removal audio filter", + "karaoke", + "Reynaldo H. Verdejo Pinochet", + "", + AF_FLAGS_NOT_REENTRANT, + af_open +}; |