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https://github.com/mpv-player/mpv
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Add audio filter scaletempo
Patch by Robert Juliano, juliano.1 osu edu git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@24924 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
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@ -5148,6 +5148,79 @@ Beware that this filter will turn your signal into mono.
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Works well for 2 channel tracks; do not bother trying it
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on anything but 2 channel stereo.
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.
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.TP
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.B scaletempo[=option1:option2:...]
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Scales audio tempo without altering pitch, optionally synced to playback
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speed (default).
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.br
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This works by playing \'stride\' ms of audio at normal speed then
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consuming \'stride*scale\' ms of input audio.
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It pieces the strides together by blending 'overlap'% of stride with
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audio following the previous stride.
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It optionally performs a short statistical analysis on the next \'search\'
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ms of audio to determine the best overlap position.
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.PD 0
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.RSs
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.IPs scale=<amount>
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Nominal amount to scale tempo.
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Scales this amount in addition to speed.
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(default: 1.0)
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.IPs stride=<amount>
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Length in milliseconds to output each stride.
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Too high of value will cause noticable skips at high scale amounts and
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an echo at low scale amounts.
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Very low values will alter pitch.
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Increasing improves performance.
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(default: 60)
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.IPs overlap=<percent>
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Percentage of stride to overlap.
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Decreasing improves performance.
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(default: .20)
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.IPs search=<amount>
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Length in milliseconds to search for best overlap position.
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Decreasing improves performance greatly.
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On slow systems, you will probably want to set this very low.
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(default: 14)
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.IPs speed=<tempo|pitch|both|none>
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Set response to speed change.
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.RSss
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.IPs tempo
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Scale tempo in sync with speed (default)
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.IPs pitch
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Reverses effect of filter.
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Scales pitch without altering tempo.
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Add \'[ speed_mult 0.9438743126816935\' and \'] speed_mult 1.059463094352953\'
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to your input.conf to step by musical semi-tones.
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.I WARNING:
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Looses synch with video.
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.IPs both
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Scale both tempo and pitch
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.IPs none
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Ignore speed changes
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.RE
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.RE
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.sp 1
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.RS
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.I EXAMPLE:
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.RE
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.RSs
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.IPs "mplayer \-af scaletempo \-speed 1.2 media.ogg"
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Would playback media at 1.2x normal speed, with audio at normal pitch.
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Changing playback speed, would change audio tempo to match.
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.IPs "mplayer \-af scaletempo=scale=1.2:speed=none \-speed 1.2 media.ogg"
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Would playback media at 1.2x normal speed, with audio at normal pitch,
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but changing playback speed has no effect on audio tempo.
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.IPs "mplayer \-af scaletempo=stride=30:overlap=.50:search=10 media.ogg"
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Would tweak the quality and performace parameters.
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.IPs "mplayer \-af format=floatne,scaletempo media.ogg"
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Would make scaletempo use float code.
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Maybe faster on some platforms.
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.IPs "mplayer \-af scaletempo=scale=1.2:speed=pitch audio.ogg"
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Would playback audio file at 1.2x normal speed, with audio at normal pitch.
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Changing playback speed, would change pitch, leaving audio tempo at 1.2x.
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.RE
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.PD 1
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.
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.
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.
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.SH "VIDEO FILTERS"
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2
Makefile
2
Makefile
@ -30,6 +30,7 @@ SRCS_COMMON = asxparser.c \
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playtreeparser.c \
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spudec.c \
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sub_cc.c \
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subopt-helper.c \
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subreader.c \
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vobsub.c \
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@ -41,7 +42,6 @@ SRCS_MPLAYER = mplayer.c \
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mp_msg.c \
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mixer.c \
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parser-mpcmd.c \
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subopt-helper.c \
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command.c \
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SRCS_MENCODER = mencoder.c \
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@ -1254,6 +1254,7 @@ static char help_text[]=
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// ======================= AF Audio Filters ================================
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// libaf
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#define MSGTR_AF_ValueOutOfRange MSGTR_VO_ValueOutOfRange
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// af_ladspa.c
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@ -16,6 +16,7 @@ SRCS_COMMON = af.c \
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af_karaoke.c \
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af_pan.c \
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af_resample.c \
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af_scaletempo.c \
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af_sinesuppress.c \
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af_sub.c \
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af_surround.c \
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@ -31,6 +31,7 @@ extern af_info_t af_info_ladspa;
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extern af_info_t af_info_center;
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extern af_info_t af_info_sinesuppress;
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extern af_info_t af_info_karaoke;
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extern af_info_t af_info_scaletempo;
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static af_info_t* filter_list[]={
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&af_info_dummy,
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@ -61,6 +62,7 @@ static af_info_t* filter_list[]={
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&af_info_center,
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&af_info_sinesuppress,
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&af_info_karaoke,
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&af_info_scaletempo,
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NULL
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};
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547
libaf/af_scaletempo.c
Normal file
547
libaf/af_scaletempo.c
Normal file
@ -0,0 +1,547 @@
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/*
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* scaletempo audio filter
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* Copyright (c) 2007 Robert Juliano
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*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with MPlayer; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* scale tempo while maintaining pitch
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* (WSOLA technique with cross correlation)
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* inspired by SoundTouch library by Olli Parviainen
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*
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* basic algorithm
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* - produce 'stride' output samples per loop
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* - consume stride*scale input samples per loop
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*
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* to produce smoother transitions between strides, blend next overlap
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* samples from last stride with correlated samples of current input
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*
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include "af.h"
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#include "libavutil/common.h"
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#include "subopt-helper.h"
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#include "help_mp.h"
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// Data for specific instances of this filter
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typedef struct af_scaletempo_s
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{
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// stride
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float scale;
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float speed;
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float frames_stride_scaled;
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float frames_stride_error;
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int bytes_per_frame;
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int bytes_stride;
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float bytes_stride_scaled;
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int bytes_queue;
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int bytes_queued;
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int bytes_to_slide;
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int8_t* buf_queue;
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// overlap
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int samples_overlap;
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int samples_standing;
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int bytes_overlap;
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int bytes_standing;
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int8_t* buf_overlap;
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int8_t* table_blend;
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void (*output_overlap)(struct af_scaletempo_s* s, int8_t* out_buf, int bytes_off);
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// best overlap
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int frames_search;
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int num_channels;
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int8_t* buf_pre_corr;
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int8_t* table_window;
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int (*best_overlap_offset)(struct af_scaletempo_s* s);
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short shift_corr;
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// command line
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float scale_nominal;
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float ms_stride;
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float percent_overlap;
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float ms_search;
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short speed_tempo;
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short speed_pitch;
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} af_scaletempo_t;
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int fill_queue(struct af_instance_s* af, af_data_t* data, int offset) {
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af_scaletempo_t* s = af->setup;
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int bytes_in = data->len - offset;
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int offset_unchanged = offset;
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if (s->bytes_to_slide > 0) {
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if (s->bytes_to_slide < s->bytes_queued) {
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int bytes_move = s->bytes_queued - s->bytes_to_slide;
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memmove(s->buf_queue,
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s->buf_queue + s->bytes_to_slide,
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bytes_move);
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s->bytes_to_slide = 0;
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s->bytes_queued = bytes_move;
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} else {
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int bytes_skip;
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s->bytes_to_slide -= s->bytes_queued;
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bytes_skip = FFMIN(s->bytes_to_slide, bytes_in);
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s->bytes_queued = 0;
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s->bytes_to_slide -= bytes_skip;
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offset += bytes_skip;
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bytes_in -= bytes_skip;
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}
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}
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if (bytes_in > 0) {
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int bytes_copy = FFMIN(s->bytes_queue - s->bytes_queued, bytes_in);
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memcpy(s->buf_queue + s->bytes_queued,
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(int8_t*)data->audio + offset,
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bytes_copy);
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s->bytes_queued += bytes_copy;
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offset += bytes_copy;
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}
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return offset - offset_unchanged;
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}
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int _best_overlap_offset_float(af_scaletempo_t* s) {
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float *pw, *po, *ppc, *search_start;
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float best_corr = INT_MIN;
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int best_off = 0;
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int i, off;
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pw = (float*)s->table_window;
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po = (float*)s->buf_overlap + s->num_channels;
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ppc = (float*)s->buf_pre_corr;
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for (i=s->num_channels; i<s->samples_overlap; i++) {
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*ppc++ = *pw++ * *po++;
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}
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search_start = (float*)s->buf_queue + s->num_channels;
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for (off=0; off<s->frames_search; off++) {
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float corr = 0;
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float* ps = search_start;
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ppc = (float*)s->buf_pre_corr;
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for (i=s->num_channels; i<s->samples_overlap; i++) {
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corr += *ppc++ * *ps++;
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}
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if (corr > best_corr) {
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best_corr = corr;
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best_off = off;
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}
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search_start += s->num_channels;
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}
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return best_off * 4;
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}
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int _best_overlap_offset_s16(af_scaletempo_t* s) {
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int32_t *pw, *ppc;
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int16_t *po, *search_start;
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int32_t best_corr = INT_MIN;
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int best_off = 0;
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int i, off;
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pw = (int32_t*)s->table_window;
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po = (int16_t*)s->buf_overlap + s->num_channels;
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ppc = (int32_t*)s->buf_pre_corr;
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for (i=s->num_channels; i<s->samples_overlap; i++) {
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*ppc++ = ( *pw++ * *po++ ) >> 15;
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}
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search_start = (int16_t*)s->buf_queue + s->num_channels;
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for (off=0; off<s->frames_search; off++) {
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int32_t corr = 0;
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int16_t* ps = search_start;
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ppc = (int32_t*)s->buf_pre_corr;
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for (i=s->num_channels; i<s->samples_overlap; i++) {
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corr += ( *ppc++ * *ps++ ) >> s->shift_corr;
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}
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if (corr > best_corr) {
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best_corr = corr;
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best_off = off;
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}
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search_start += s->num_channels;
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}
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return best_off * 2;
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}
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void _output_overlap_float(af_scaletempo_t* s, int8_t* buf_out, int bytes_off) {
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float* pout = (float*)buf_out;
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float* pb = (float*)s->table_blend;
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float* po = (float*)s->buf_overlap;
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float* pin = (float*)(s->buf_queue + bytes_off);
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int i;
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for (i=0; i<s->samples_overlap; i++) {
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*pout++ = *po - *pb++ * ( *po - *pin++ ); po++;
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}
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}
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void _output_overlap_s16(af_scaletempo_t* s, int8_t* buf_out, int bytes_off) {
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int16_t* pout = (int16_t*)buf_out;
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int32_t* pb = (int32_t*)s->table_blend;
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int16_t* po = (int16_t*)s->buf_overlap;
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int16_t* pin = (int16_t*)(s->buf_queue + bytes_off);
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int i;
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for (i=0; i<s->samples_overlap; i++) {
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*pout++ = *po - ( ( *pb++ * ( *po - *pin++ ) ) >> 16 ); po++;
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}
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}
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// Filter data through filter
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static af_data_t* play(struct af_instance_s* af, af_data_t* data)
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{
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af_scaletempo_t* s = af->setup;
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int offset_in;
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int max_bytes_out;
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int8_t* pout;
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if (s->scale == 1.0) {
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return data;
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}
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// RESIZE_LOCAL_BUFFER - can't use macro
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max_bytes_out = ((int)(data->len / s->bytes_stride_scaled) + 1) * s->bytes_stride;
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if (max_bytes_out > af->data->len) {
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af_msg(AF_MSG_VERBOSE, "[libaf] Reallocating memory in module %s, "
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"old len = %i, new len = %i\n",af->info->name,af->data->len,max_bytes_out);
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af->data->audio = realloc(af->data->audio, max_bytes_out);
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if (!af->data->audio) {
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af_msg(AF_MSG_FATAL, "[libaf] Could not allocate memory\n");
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return NULL;
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}
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af->data->len = max_bytes_out;
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}
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offset_in = fill_queue(af, data, 0);
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pout = af->data->audio;
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while (s->bytes_queued >= s->bytes_queue) {
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int ti;
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float tf;
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int bytes_off = 0;
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// output stride
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if (s->output_overlap) {
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if (s->best_overlap_offset)
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bytes_off = s->best_overlap_offset(s);
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s->output_overlap(s, pout, bytes_off);
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}
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memcpy(pout + s->bytes_overlap,
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s->buf_queue + bytes_off + s->bytes_overlap,
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s->bytes_standing);
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pout += s->bytes_stride;
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// input stride
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memcpy(s->buf_overlap,
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s->buf_queue + bytes_off + s->bytes_stride,
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s->bytes_overlap);
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tf = s->frames_stride_scaled + s->frames_stride_error;
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ti = (int)tf;
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s->frames_stride_error = tf - ti;
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s->bytes_to_slide = ti * s->bytes_per_frame;
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offset_in += fill_queue(af, data, offset_in);
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}
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data->audio = af->data->audio;
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data->len = (int)pout - (int)af->data->audio;
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return data;
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}
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// Initialization and runtime control
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static int control(struct af_instance_s* af, int cmd, void* arg)
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{
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af_scaletempo_t* s = af->setup;
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switch(cmd){
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case AF_CONTROL_REINIT:{
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af_data_t* data = (af_data_t*)arg;
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float srate = data->rate / 1000;
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int nch = data->nch;
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int bps;
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int use_int = 0;
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int frames_stride, frames_overlap;
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int i, j;
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af_msg(AF_MSG_VERBOSE,
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"[scaletempo] %.3f speed * %.3f scale_nominal = %.3f\n",
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s->speed, s->scale_nominal, s->scale);
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if (s->scale == 1.0) {
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if (s->speed_tempo && s->speed_pitch)
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return AF_DETACH;
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memcpy(af->data, data, sizeof(af_data_t));
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return af_test_output(af, data);
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}
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af->data->rate = data->rate;
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af->data->nch = data->nch;
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if ( data->format == AF_FORMAT_S16_LE
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|| data->format == AF_FORMAT_S16_BE ) {
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use_int = 1;
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af->data->format = AF_FORMAT_S16_NE;
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af->data->bps = bps = 2;
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} else {
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af->data->format = AF_FORMAT_FLOAT_NE;
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af->data->bps = bps = 4;
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}
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frames_stride = srate * s->ms_stride;
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s->bytes_stride = frames_stride * bps * nch;
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s->bytes_stride_scaled = s->scale * s->bytes_stride;
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s->frames_stride_scaled = s->scale * frames_stride;
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s->frames_stride_error = 0;
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af->mul = (double)s->bytes_stride / s->bytes_stride_scaled;
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frames_overlap = frames_stride * s->percent_overlap;
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if (frames_overlap <= 0) {
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s->bytes_standing = s->bytes_stride;
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s->samples_standing = s->bytes_standing / bps;
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s->output_overlap = NULL;
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} else {
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s->samples_overlap = frames_overlap * nch;
|
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s->bytes_overlap = frames_overlap * nch * bps;
|
||||
s->bytes_standing = s->bytes_stride - s->bytes_overlap;
|
||||
s->samples_standing = s->bytes_standing / bps;
|
||||
s->buf_overlap = realloc(s->buf_overlap, s->bytes_overlap);
|
||||
s->table_blend = realloc(s->table_blend, s->bytes_overlap * 4);
|
||||
if(!s->buf_overlap || !s->table_blend) {
|
||||
af_msg(AF_MSG_FATAL, "[scaletempo] Out of memory\n");
|
||||
return AF_ERROR;
|
||||
}
|
||||
bzero(s->buf_overlap, s->bytes_overlap);
|
||||
if (use_int) {
|
||||
int32_t* pb = (int32_t*)s->table_blend;
|
||||
int64_t blend = 0;
|
||||
for (i=0; i<frames_overlap; i++) {
|
||||
int32_t v = blend / frames_overlap;
|
||||
for (j=0; j<nch; j++) {
|
||||
*pb++ = v;
|
||||
}
|
||||
blend += 65536; // 2^16
|
||||
}
|
||||
s->output_overlap = _output_overlap_s16;
|
||||
} else {
|
||||
float* pb = (float*)s->table_blend;
|
||||
for (i=0; i<frames_overlap; i++) {
|
||||
float v = i / (float)frames_overlap;
|
||||
for (j=0; j<nch; j++) {
|
||||
*pb++ = v;
|
||||
}
|
||||
}
|
||||
s->output_overlap = _output_overlap_float;
|
||||
}
|
||||
}
|
||||
|
||||
s->frames_search = (frames_overlap > 1) ? srate * s->ms_search : 0;
|
||||
if (s->frames_search <= 0) {
|
||||
s->best_overlap_offset = NULL;
|
||||
} else {
|
||||
if (use_int) {
|
||||
int64_t t = frames_overlap;
|
||||
int32_t n = 8589934588LL / (t * t); // 4 * (2^31 - 1) / t^2
|
||||
int32_t* pw;
|
||||
s->buf_pre_corr = realloc(s->buf_pre_corr, s->bytes_overlap * 2);
|
||||
s->table_window = realloc(s->table_window, s->bytes_overlap * 2 - nch * bps * 2);
|
||||
if(!s->buf_pre_corr && !s->table_window) {
|
||||
af_msg(AF_MSG_FATAL, "[scaletempo] Out of memory\n");
|
||||
return AF_ERROR;
|
||||
}
|
||||
pw = (int32_t*)s->table_window;
|
||||
for (i=1; i<frames_overlap; i++) {
|
||||
int32_t v = ( i * (t - i) * n ) >> 15;
|
||||
for (j=0; j<nch; j++) {
|
||||
*pw++ = v;
|
||||
}
|
||||
}
|
||||
s->shift_corr = av_log2( 2*(s->samples_overlap - nch) - 1 );
|
||||
s->best_overlap_offset = _best_overlap_offset_s16;
|
||||
} else {
|
||||
float* pw;
|
||||
s->buf_pre_corr = realloc(s->buf_pre_corr, s->bytes_overlap);
|
||||
s->table_window = realloc(s->table_window, s->bytes_overlap - nch * bps);
|
||||
if(!s->buf_pre_corr || !s->table_window) {
|
||||
af_msg(AF_MSG_FATAL, "[scaletempo] Out of memory\n");
|
||||
return AF_ERROR;
|
||||
}
|
||||
pw = (float*)s->table_window;
|
||||
for (i=1; i<frames_overlap; i++) {
|
||||
float v = i * (frames_overlap - i);
|
||||
for (j=0; j<nch; j++) {
|
||||
*pw++ = v;
|
||||
}
|
||||
}
|
||||
s->best_overlap_offset = _best_overlap_offset_float;
|
||||
}
|
||||
}
|
||||
|
||||
s->bytes_per_frame = bps * nch;
|
||||
s->num_channels = nch;
|
||||
|
||||
s->bytes_queue
|
||||
= (s->frames_search + frames_stride + frames_overlap) * bps * nch;
|
||||
s->buf_queue = realloc(s->buf_queue, s->bytes_queue);
|
||||
if(!s->buf_queue) {
|
||||
af_msg(AF_MSG_FATAL, "[scaletempo] Out of memory\n");
|
||||
return AF_ERROR;
|
||||
}
|
||||
|
||||
af_msg (AF_MSG_DEBUG0, "[scaletempo] "
|
||||
"%.2f stride_in, %i stride_out, %i standing, "
|
||||
"%i overlap, %i search, %i queue, %s mode\n",
|
||||
s->frames_stride_scaled,
|
||||
(int)(s->bytes_stride / nch / bps),
|
||||
(int)(s->bytes_standing / nch / bps),
|
||||
(int)(s->bytes_overlap / nch / bps),
|
||||
s->frames_search,
|
||||
(int)(s->bytes_queue / nch / bps),
|
||||
(use_int?"s16":"float"));
|
||||
|
||||
return af_test_output(af, (af_data_t*)arg);
|
||||
}
|
||||
case AF_CONTROL_PLAYBACK_SPEED | AF_CONTROL_SET:{
|
||||
if (s->speed_tempo) {
|
||||
if (s->speed_pitch) {
|
||||
break;
|
||||
}
|
||||
s->speed = *(float*)arg;
|
||||
s->scale = s->speed * s->scale_nominal;
|
||||
} else {
|
||||
if (s->speed_pitch) {
|
||||
s->speed = 1 / *(float*)arg;
|
||||
s->scale = s->speed * s->scale_nominal;
|
||||
break;
|
||||
}
|
||||
}
|
||||
return AF_OK;
|
||||
}
|
||||
case AF_CONTROL_SCALETEMPO_AMOUNT | AF_CONTROL_SET:{
|
||||
s->scale = *(float*)arg;
|
||||
s->scale = s->speed * s->scale_nominal;
|
||||
return AF_OK;
|
||||
}
|
||||
case AF_CONTROL_SCALETEMPO_AMOUNT | AF_CONTROL_GET:
|
||||
*(float*)arg = s->scale;
|
||||
return AF_OK;
|
||||
case AF_CONTROL_COMMAND_LINE:{
|
||||
strarg_t speed;
|
||||
opt_t subopts[] = {
|
||||
{"scale", OPT_ARG_FLOAT, &s->scale_nominal, NULL},
|
||||
{"stride", OPT_ARG_FLOAT, &s->ms_stride, NULL},
|
||||
{"overlap", OPT_ARG_FLOAT, &s->percent_overlap, NULL},
|
||||
{"search", OPT_ARG_FLOAT, &s->ms_search, NULL},
|
||||
{"speed", OPT_ARG_STR, &speed, NULL},
|
||||
{NULL},
|
||||
};
|
||||
if (subopt_parse(arg, subopts) != 0) {
|
||||
return AF_ERROR;
|
||||
}
|
||||
if (s->scale_nominal <= 0) {
|
||||
af_msg(AF_MSG_ERROR, "[scaletempo] "
|
||||
MSGTR_ErrorParsingCommandLine ": " MSGTR_AF_ValueOutOfRange
|
||||
": scale > 0\n");
|
||||
return AF_ERROR;
|
||||
}
|
||||
if (s->ms_stride <= 0) {
|
||||
af_msg(AF_MSG_ERROR, "[scaletempo] "
|
||||
MSGTR_ErrorParsingCommandLine ": " MSGTR_AF_ValueOutOfRange
|
||||
": stride > 0\n");
|
||||
return AF_ERROR;
|
||||
}
|
||||
if (s->percent_overlap < 0 || s->percent_overlap > 1) {
|
||||
af_msg(AF_MSG_ERROR, "[scaletempo] "
|
||||
MSGTR_ErrorParsingCommandLine ": " MSGTR_AF_ValueOutOfRange
|
||||
": 0 <= overlap <= 1\n");
|
||||
return AF_ERROR;
|
||||
}
|
||||
if (s->ms_search < 0) {
|
||||
af_msg(AF_MSG_ERROR, "[scaletempo] "
|
||||
MSGTR_ErrorParsingCommandLine ": " MSGTR_AF_ValueOutOfRange
|
||||
": search >= 0\n");
|
||||
return AF_ERROR;
|
||||
}
|
||||
if (speed.len > 0) {
|
||||
if (strcmp(speed.str, "pitch") == 0) {
|
||||
s->speed_tempo = 0;
|
||||
s->speed_pitch = 1;
|
||||
} else if (strcmp(speed.str, "tempo") == 0) {
|
||||
s->speed_tempo = 1;
|
||||
s->speed_pitch = 0;
|
||||
} else if (strcmp(speed.str, "none") == 0) {
|
||||
s->speed_tempo = 0;
|
||||
s->speed_pitch = 0;
|
||||
} else if (strcmp(speed.str, "both") == 0) {
|
||||
s->speed_tempo = 1;
|
||||
s->speed_pitch = 1;
|
||||
} else {
|
||||
af_msg(AF_MSG_ERROR, "[scaletempo] "
|
||||
MSGTR_ErrorParsingCommandLine ": " MSGTR_AF_ValueOutOfRange
|
||||
": speed=[pitch|tempo|none|both]\n");
|
||||
return AF_ERROR;
|
||||
}
|
||||
}
|
||||
s->scale = s->speed * s->scale_nominal;
|
||||
af_msg(AF_MSG_DEBUG0, "[scaletempo] %6.3f scale, %6.2f stride, %6.2f overlap, %6.2f search, speed = %s\n", s->scale_nominal, s->ms_stride, s->percent_overlap, s->ms_search, (s->speed_tempo?(s->speed_pitch?"tempo and speed":"tempo"):(s->speed_pitch?"pitch":"none")));
|
||||
return AF_OK;
|
||||
}
|
||||
}
|
||||
return AF_UNKNOWN;
|
||||
}
|
||||
|
||||
// Deallocate memory
|
||||
static void uninit(struct af_instance_s* af)
|
||||
{
|
||||
af_scaletempo_t* s = af->setup;
|
||||
free(af->data->audio);
|
||||
free(af->data);
|
||||
free(s->buf_queue);
|
||||
free(s->buf_overlap);
|
||||
free(s->buf_pre_corr);
|
||||
free(s->table_blend);
|
||||
free(s->table_window);
|
||||
free(af->setup);
|
||||
}
|
||||
|
||||
// Allocate memory and set function pointers
|
||||
static int af_open(af_instance_t* af){
|
||||
af_scaletempo_t* s;
|
||||
|
||||
af->control = control;
|
||||
af->uninit = uninit;
|
||||
af->play = play;
|
||||
af->mul = 1;
|
||||
af->data = calloc(1,sizeof(af_data_t));
|
||||
af->setup = calloc(1,sizeof(af_scaletempo_t));
|
||||
if(af->data == NULL || af->setup == NULL)
|
||||
return AF_ERROR;
|
||||
|
||||
s = af->setup;
|
||||
s->scale = s->speed = s->scale_nominal = 1.0;
|
||||
s->speed_tempo = 1;
|
||||
s->speed_pitch = 0;
|
||||
s->ms_stride = 60;
|
||||
s->percent_overlap = .20;
|
||||
s->ms_search = 14;
|
||||
|
||||
return AF_OK;
|
||||
}
|
||||
|
||||
// Description of this filter
|
||||
af_info_t af_info_scaletempo = {
|
||||
"Scale audio tempo while maintaining pitch",
|
||||
"scaletempo",
|
||||
"Robert Juliano",
|
||||
"",
|
||||
AF_FLAGS_REENTRANT,
|
||||
af_open
|
||||
};
|
||||
@ -231,4 +231,7 @@ typedef struct af_control_ext_s{
|
||||
#define AF_CONTROL_SS_FREQ 0x00002300 | AF_CONTROL_FILTER_SPECIFIC
|
||||
#define AF_CONTROL_SS_DECAY 0x00002400 | AF_CONTROL_FILTER_SPECIFIC
|
||||
|
||||
#define AF_CONTROL_PLAYBACK_SPEED 0x00002500 | AF_CONTROL_FILTER_SPECIFIC
|
||||
#define AF_CONTROL_SCALETEMPO_AMOUNT 0x00002600 | AF_CONTROL_FILTER_SPECIFIC
|
||||
|
||||
#endif /*__af_control_h */
|
||||
|
||||
22
mplayer.c
22
mplayer.c
@ -1203,14 +1203,20 @@ int build_afilter_chain(sh_audio_t *sh_audio, ao_data_t *ao_data)
|
||||
mpctx->mixer.afilter = NULL;
|
||||
return 0;
|
||||
}
|
||||
new_srate = sh_audio->samplerate * playback_speed;
|
||||
if (new_srate != ao_data->samplerate) {
|
||||
// limits are taken from libaf/af_resample.c
|
||||
if (new_srate < 8000)
|
||||
new_srate = 8000;
|
||||
if (new_srate > 192000)
|
||||
new_srate = 192000;
|
||||
playback_speed = (float)new_srate / (float)sh_audio->samplerate;
|
||||
if(af_control_any_rev(sh_audio->afilter,
|
||||
AF_CONTROL_PLAYBACK_SPEED | AF_CONTROL_SET,
|
||||
&playback_speed)) {
|
||||
new_srate = sh_audio->samplerate;
|
||||
} else {
|
||||
new_srate = sh_audio->samplerate * playback_speed;
|
||||
if (new_srate != ao_data->samplerate) {
|
||||
// limits are taken from libaf/af_resample.c
|
||||
if (new_srate < 8000)
|
||||
new_srate = 8000;
|
||||
if (new_srate > 192000)
|
||||
new_srate = 192000;
|
||||
playback_speed = (float)new_srate / (float)sh_audio->samplerate;
|
||||
}
|
||||
}
|
||||
result = init_audio_filters(sh_audio, new_srate,
|
||||
&ao_data->samplerate, &ao_data->channels, &ao_data->format);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user