diff options
Diffstat (limited to 'libao2/pl_extrastereo.c')
-rw-r--r-- | libao2/pl_extrastereo.c | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/libao2/pl_extrastereo.c b/libao2/pl_extrastereo.c deleted file mode 100644 index 9f3404d5fe..0000000000 --- a/libao2/pl_extrastereo.c +++ /dev/null @@ -1,127 +0,0 @@ -/* Extrastereo effect plugin - * (linearly increases difference between L&R channels) - * - * Current limitations: - * - only AFMT_S16_HE is supported currently - * - * License: GPLv2 (as a mix of pl_volume.c and - * xmms:stereo_plugin/stereo.c) - * - * Author: pl <p_l@gmx.fr> (c) 2002 and beyond... - * */ - -#define PLUGIN - -#include <stdio.h> -#include <stdlib.h> -#include <inttypes.h> - -#include "audio_out.h" -#include "audio_plugin.h" -#include "audio_plugin_internal.h" -#include "libaf/af_format.h" - -static ao_info_t info = { - "Extra stereo plugin", - "extrastereo", - "pl <p_l@gmx.fr>", - "" -}; - -LIBAO_PLUGIN_EXTERN(extrastereo) - -// local data -static struct { - float mul; // intensity - int inuse; // This plugin is in use TRUE, FALSE - int format; // sample format -} pl_extrastereo = {2.5, 0, 0}; - - -// to set/get/query special features/parameters -static int control(int cmd,void *arg){ - switch(cmd){ - case AOCONTROL_PLUGIN_SET_LEN: - return CONTROL_OK; - case AOCONTROL_PLUGIN_ES_SET: - pl_extrastereo.mul=*((float*)arg); - return CONTROL_OK; - case AOCONTROL_PLUGIN_ES_GET: - *((float*)arg)=pl_extrastereo.mul; - return CONTROL_OK; - } - return CONTROL_UNKNOWN; -} - -// open & setup audio device -// return: 1=success 0=fail -static int init(){ - switch(ao_plugin_data.format){ - case(AF_FORMAT_S16_NE): - break; - default: - fprintf(stderr,"[pl_extrastereo] Audio format not yet suported \n"); - return 0; - } - - pl_extrastereo.mul=ao_plugin_cfg.pl_extrastereo_mul; - pl_extrastereo.format=ao_plugin_data.format; - pl_extrastereo.inuse=1; - - printf("[pl_extrastereo] Extra stereo plugin in use (multiplier=%2.2f).\n", - pl_extrastereo.mul); - return 1; -} - -// close plugin -static void uninit(){ - pl_extrastereo.inuse=0; -} - -// empty buffers -static void reset(){ -} - -// processes 'ao_plugin_data.len' bytes of 'data' -// called for every block of data -static int play(){ - - switch(pl_extrastereo.format){ - case(AF_FORMAT_S16_NE): { - - int16_t* data=(int16_t*)ao_plugin_data.data; - int len=ao_plugin_data.len / 2; // 16 bits samples - - float mul = pl_extrastereo.mul; - int32_t i, avg, ltmp, rtmp; - - for (i=0; i < len ; i += 2) { - - avg = (data[i] + data[i + 1]) / 2; - - ltmp = avg + (int) (mul * (data[i] - avg)); - rtmp = avg + (int) (mul * (data[i + 1] - avg)); - - if (ltmp < -32768) { - ltmp = -32768; - } else if (ltmp > 32767) { - ltmp = 32767; - } - - if (rtmp < -32768) { - rtmp = -32768; - } else if (rtmp > 32767) { - rtmp = 32767; - } - - data[i] = ltmp; - data[i + 1] = rtmp; - } - break; - } - default: - return 0; - } - return 1; -} - |