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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_tools.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_tools.c')
-rw-r--r-- | audio/filter/af_tools.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/audio/filter/af_tools.c b/audio/filter/af_tools.c new file mode 100644 index 0000000000..0d5dc6c573 --- /dev/null +++ b/audio/filter/af_tools.c @@ -0,0 +1,110 @@ +/* + * 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 <math.h> +#include <string.h> +#include "af.h" + +/* Convert to gain value from dB. Returns AF_OK if of and AF_ERROR if + fail */ +int af_from_dB(int n, float* in, float* out, float k, float mi, float ma) +{ + int i = 0; + // Sanity check + if(!in || !out) + return AF_ERROR; + + for(i=0;i<n;i++){ + if(in[i]<=-200) + out[i]=0.0; + else + out[i]=pow(10.0,clamp(in[i],mi,ma)/k); + } + return AF_OK; +} + +/* Convert from gain value to dB. Returns AF_OK if of and AF_ERROR if + fail */ +int af_to_dB(int n, float* in, float* out, float k) +{ + int i = 0; + // Sanity check + if(!in || !out) + return AF_ERROR; + + for(i=0;i<n;i++){ + if(in[i] == 0.0) + out[i]=-200.0; + else + out[i]=k*log10(in[i]); + } + return AF_OK; +} + +/* Convert from ms to sample time */ +int af_from_ms(int n, float* in, int* out, int rate, float mi, float ma) +{ + int i = 0; + // Sanity check + if(!in || !out) + return AF_ERROR; + + for(i=0;i<n;i++) + out[i]=(int)((float)rate * clamp(in[i],mi,ma)/1000.0); + + return AF_OK; +} + +/* Convert from sample time to ms */ +int af_to_ms(int n, int* in, float* out, int rate) +{ + int i = 0; + // Sanity check + if(!in || !out || !rate) + return AF_ERROR; + + for(i=0;i<n;i++) + out[i]=1000.0 * (float)in[i]/((float)rate); + + return AF_OK; +} + +/* Helper function for testing the output format */ +int af_test_output(struct af_instance* af, struct mp_audio* out) +{ + if((af->data->format != out->format) || + (af->data->bps != out->bps) || + (af->data->rate != out->rate) || + (af->data->nch != out->nch)){ + memcpy(out,af->data,sizeof(struct mp_audio)); + return AF_FALSE; + } + return AF_OK; +} + +/* Soft clipping, the sound of a dream, thanks to Jon Wattes + post to Musicdsp.org */ +float af_softclip(float a) +{ + if (a >= M_PI/2) + return 1.0; + else if (a <= -M_PI/2) + return -1.0; + else + return sin(a); +} |