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-rw-r--r--src/volume.c416
1 files changed, 416 insertions, 0 deletions
diff --git a/src/volume.c b/src/volume.c
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+++ b/src/volume.c
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+/* the Music Player Daemon (MPD)
+ * (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu)
+ * This project's homepage is: http://www.musicpd.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 "volume.h"
+
+#include "command.h"
+#include "conf.h"
+#include "log.h"
+#include "player.h"
+
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <errno.h>
+#ifndef NO_OSS_MIXER
+#include <sys/soundcard.h>
+#endif
+#ifdef HAVE_ALSA
+#include <alsa/asoundlib.h>
+#endif
+
+#define VOLUME_MIXER_TYPE_SOFTWARE 0
+#define VOLUME_MIXER_TYPE_OSS 1
+#define VOLUME_MIXER_TYPE_ALSA 2
+
+#define VOLUME_MIXER_SOFTWARE_DEFAULT ""
+#define VOLUME_MIXER_OSS_DEFAULT "/dev/mixer"
+#define VOLUME_MIXER_ALSA_DEFAULT "default"
+
+int volume_mixerType = VOLUME_MIXER_TYPE_SOFTWARE;
+char * volume_mixerDevice;
+
+#ifndef NO_OSS_MIXER
+int volume_ossFd;
+int volume_ossControl = SOUND_MIXER_VOLUME;
+#endif
+
+#ifdef HAVE_ALSA
+snd_mixer_t * volume_alsaMixerHandle = NULL;
+snd_mixer_elem_t * volume_alsaElem;
+long volume_alsaMin;
+long volume_alsaMax;
+#endif
+
+#ifndef NO_OSS_MIXER
+int prepOssMixer(char * device) {
+ int devmask = 0;
+
+ if((volume_ossFd = open(device,O_RDONLY))<0) {
+ ERROR("unable to open oss mixer \"%s\"\n",device);
+ return -1;
+ }
+
+ if(getConf()[CONF_MIXER_CONTROL]) {
+ char * labels[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_LABELS;
+ char * dup;
+ int i,j;
+
+ if(ioctl(volume_ossFd,SOUND_MIXER_READ_DEVMASK,&devmask)<0) {
+ ERROR("errors getting read_devmask for oss mixer\n");
+ close(volume_ossFd);
+ return -1;
+ }
+
+ for(i=0;i<SOUND_MIXER_NRDEVICES;i++) {
+ dup = strdup(labels[i]);
+ /* eliminate spaces at the end */
+ j = strlen(dup)-1;
+ while(j>=0 && dup[j]==' ') dup[j--] = '\0';
+ if(strcmp(dup,getConf()[CONF_MIXER_CONTROL])==0) {
+ free(dup);
+ break;
+ }
+ free(dup);
+ }
+
+ if(i>=SOUND_MIXER_NRDEVICES) {
+ ERROR("mixer control \"%s\" not found\n",
+ getConf()[CONF_MIXER_CONTROL]);
+ close(volume_ossFd);
+ return -1;
+ }
+ else if(!( ( 1 << i ) & devmask )) {
+ ERROR("mixer control \"%s\" not usable\n",
+ getConf()[CONF_MIXER_CONTROL]);
+ close(volume_ossFd);
+ return -1;
+ }
+
+ volume_ossControl = i;
+ }
+
+ return 0;
+}
+
+void closeOssMixer() {
+ close(volume_ossFd);
+}
+
+int getOssVolumeLevel() {
+ int left, right, level;
+
+ if(ioctl(volume_ossFd,MIXER_READ(volume_ossControl),&level) < 0) {
+ while(close(volume_ossFd)<0 && errno==EINTR);
+ ERROR("unable to read volume\n");
+ return -1;
+ }
+
+ left = level & 0xff;
+ right = (level & 0xff00) >> 8;
+
+ if(left!=right) {
+ ERROR("volume for left and right is not the same, \"%i\" and "
+ "\"%i\"\n",left,right);
+ }
+
+ return left;
+}
+
+int changeOssVolumeLevel(FILE * fp, int change, int rel) {
+ int current;
+ int new;
+ int level;
+
+ if (rel) {
+ if((current = getOssVolumeLevel()) < 0) {
+ myfprintf(fp,"%s problem getting current volume\n",
+ COMMAND_RESPOND_ERROR);
+ return -1;
+ }
+
+ new = current+change;
+ }
+ else new = change;
+
+ if(new<0) new = 0;
+ else if(new>100) new = 100;
+
+ level = (new << 8) + new;
+
+ if(ioctl(volume_ossFd,MIXER_WRITE(volume_ossControl),&level) < 0) {
+ myfprintf(fp,"%s problems setting volume\n",COMMAND_RESPOND_ERROR);
+ return -1;
+ }
+
+ return 0;
+}
+#endif
+
+#ifdef HAVE_ALSA
+int prepAlsaMixer(char * card) {
+ int err;
+ snd_mixer_elem_t * elem;
+
+ if((err = snd_mixer_open(&volume_alsaMixerHandle,0))<0) {
+ ERROR("problems opening alsa mixer: %s\n",snd_strerror(err));
+ return -1;
+ }
+
+ if((err = snd_mixer_attach(volume_alsaMixerHandle,card))<0) {
+ snd_mixer_close(volume_alsaMixerHandle);
+ ERROR("problems problems attaching alsa mixer: %s\n",
+ snd_strerror(err));
+ return -1;
+ }
+
+ if((err = snd_mixer_selem_register(volume_alsaMixerHandle,NULL,NULL))<0) {
+ snd_mixer_close(volume_alsaMixerHandle);
+ ERROR("problems snd_mixer_selem_register'ing: %s\n",
+ snd_strerror(err));
+ return -1;
+ }
+
+ if((err = snd_mixer_load(volume_alsaMixerHandle))<0) {
+ snd_mixer_close(volume_alsaMixerHandle);
+ ERROR("problems snd_mixer_selem_register'ing: %s\n",
+ snd_strerror(err));
+ return -1;
+ }
+
+ elem = snd_mixer_first_elem(volume_alsaMixerHandle);
+ if(getConf()[CONF_MIXER_CONTROL]) {
+ while(elem) {
+ if(snd_mixer_elem_get_type(elem)
+ ==SND_MIXER_ELEM_SIMPLE)
+ {
+ if(strcmp(getConf()[CONF_MIXER_CONTROL],
+ snd_mixer_selem_get_name(elem))
+ ==0)
+ {
+ break;
+ }
+ }
+ elem = snd_mixer_elem_next(elem);
+ }
+
+ if(elem) {
+ volume_alsaElem = elem;
+ snd_mixer_selem_get_playback_volume_range(
+ volume_alsaElem,
+ &volume_alsaMin,&volume_alsaMax);
+ return 0;
+ }
+ }
+ else {
+ volume_alsaElem = elem;
+ if(snd_mixer_elem_get_type(volume_alsaElem)
+ ==SND_MIXER_ELEM_SIMPLE)
+ {
+ snd_mixer_selem_get_playback_volume_range(
+ volume_alsaElem,
+ &volume_alsaMin,&volume_alsaMax);
+ return 0;
+ }
+ }
+
+ snd_mixer_close(volume_alsaMixerHandle);
+ return -1;
+}
+
+void closeAlsaMixer() {
+ snd_mixer_close(volume_alsaMixerHandle);
+}
+
+int getAlsaVolumeLevel() {
+ int ret;
+ long level;
+ long max = volume_alsaMax;
+ long min = volume_alsaMin;
+ int err;
+
+ if((err = snd_mixer_selem_get_playback_volume(volume_alsaElem,
+ SND_MIXER_SCHN_FRONT_LEFT,&level))<0) {
+ ERROR("problems getting alsa volume: %s\n",snd_strerror(err));
+ return -1;
+ }
+
+ snd_mixer_selem_get_playback_volume(volume_alsaElem,
+ SND_MIXER_SCHN_FRONT_LEFT,&level);
+ ret = (int)(100*(((float)(level-min))/(max-min))+0.5);
+
+ return ret;
+}
+
+int changeAlsaVolumeLevel(FILE * fp, int change, int rel) {
+ float vol;
+ long level;
+ long max = volume_alsaMax;
+ long min = volume_alsaMin;
+ int err;
+
+ if((err = snd_mixer_selem_get_playback_volume(volume_alsaElem,
+ SND_MIXER_SCHN_FRONT_LEFT,&level))<0) {
+ myfprintf(fp,"%s problems getting volume\n",
+ COMMAND_RESPOND_ERROR);
+ ERROR("problems getting alsa volume: %s\n",snd_strerror(err));
+ return -1;
+ }
+
+ if (rel) {
+ vol = 100.0*(((float)(level-min))/(max-min));
+ vol+=change;
+ }
+ else
+ vol = change;
+
+ level = (long)(((vol/100.0)*(max-min)+min)+0.5);
+ level = level>max?max:level;
+ level = level<min?min:level;
+
+ if((err = snd_mixer_selem_set_playback_volume_all(
+ volume_alsaElem,level))<0) {
+ myfprintf(fp,"%s problems setting volume\n",
+ COMMAND_RESPOND_ERROR);
+ ERROR("problems setting alsa volume: %s\n",snd_strerror(err));
+ return -1;
+ }
+
+ return 0;
+}
+#endif
+
+int prepMixer(char * device) {
+ switch(volume_mixerType) {
+#ifdef HAVE_ALSA
+ case VOLUME_MIXER_TYPE_ALSA:
+ return prepAlsaMixer(device);
+#endif
+#ifndef NO_OSS_MIXER
+ case VOLUME_MIXER_TYPE_OSS:
+ return prepOssMixer(device);
+#endif
+ }
+
+ return 0;
+}
+
+void finishVolume() {
+ switch(volume_mixerType) {
+#ifdef HAVE_ALSA
+ case VOLUME_MIXER_TYPE_ALSA:
+ closeAlsaMixer();
+ break;
+#endif
+#ifndef NO_OSS_MIXER
+ case VOLUME_MIXER_TYPE_OSS:
+ closeOssMixer();
+ break;
+#endif
+ }
+}
+
+void initVolume() {
+ if(0);
+#ifdef HAVE_ALSA
+ else if(strcmp((getConf())[CONF_MIXER_TYPE],VOLUME_MIXER_ALSA)==0) {
+ volume_mixerType = VOLUME_MIXER_TYPE_ALSA;
+ volume_mixerDevice = VOLUME_MIXER_ALSA_DEFAULT;
+ }
+#endif
+#ifndef NO_OSS_MIXER
+ else if(strcmp((getConf())[CONF_MIXER_TYPE],VOLUME_MIXER_OSS)==0) {
+ volume_mixerType = VOLUME_MIXER_TYPE_OSS;
+ volume_mixerDevice = VOLUME_MIXER_OSS_DEFAULT;
+ }
+#endif
+ else if(strcmp((getConf())[CONF_MIXER_TYPE],VOLUME_MIXER_SOFTWARE)==0) {
+ volume_mixerType = VOLUME_MIXER_TYPE_SOFTWARE;
+ volume_mixerDevice = VOLUME_MIXER_SOFTWARE_DEFAULT;
+ }
+ else {
+ ERROR("unknown mixer type: %s\n",(getConf())[CONF_MIXER_TYPE]);
+ exit(-1);
+ }
+ if(strlen((getConf())[CONF_MIXER_DEVICE])) {
+ volume_mixerDevice = (getConf())[CONF_MIXER_DEVICE];
+ }
+}
+
+void openVolumeDevice() {
+ if(prepMixer(volume_mixerDevice)<0) {
+ ERROR("using software volume\n");
+ volume_mixerType = VOLUME_MIXER_TYPE_SOFTWARE;
+ }
+}
+
+int getSoftwareVolume() {
+ return 50*log((getPlayerSoftwareVolume()*(M_E*M_E-1)/100.0)+1)+0.5;
+}
+
+int getVolumeLevel() {
+ switch(volume_mixerType) {
+#ifdef HAVE_ALSA
+ case VOLUME_MIXER_TYPE_ALSA:
+ return getAlsaVolumeLevel();
+#endif
+#ifndef NO_OSS_MIXER
+ case VOLUME_MIXER_TYPE_OSS:
+ return getOssVolumeLevel();
+#endif
+ case VOLUME_MIXER_TYPE_SOFTWARE:
+ return getSoftwareVolume();
+ default:
+ return -1;
+ }
+}
+
+int changeSoftwareVolume(FILE * fp, int change, int rel) {
+ int new = change;
+
+ if(rel) new+=getSoftwareVolume();
+
+ if(new>100) new = 100;
+ else if(new<0) new = 0;
+
+ new = 100.0*(exp(new/50.0)-1)/(M_E*M_E-1)+0.5;
+
+ setPlayerSoftwareVolume(new);
+
+ return 0;
+}
+
+int changeVolumeLevel(FILE * fp, int change, int rel) {
+ switch(volume_mixerType) {
+#ifdef HAVE_ALSA
+ case VOLUME_MIXER_TYPE_ALSA:
+ return changeAlsaVolumeLevel(fp,change,rel);
+#endif
+#ifndef NO_OSS_MIXER
+ case VOLUME_MIXER_TYPE_OSS:
+ return changeOssVolumeLevel(fp,change,rel);
+#endif
+ case VOLUME_MIXER_TYPE_SOFTWARE:
+ return changeSoftwareVolume(fp,change,rel);
+ default:
+ myfprintf(fp,"%s no volume support!\n",COMMAND_RESPOND_ERROR);
+ return -1;
+ }
+}