From 0c7637393f25e059cdcd448c5a9baf9666ec2e1c Mon Sep 17 00:00:00 2001
From: Abramo Bagnara <abramo@alsa-project.org>
Date: Sun, 18 Feb 2001 17:56:37 +0000
Subject: [PATCH] Added range specification to simple mixer. Fixes to
 alsamixer. Added mixer support to alsa-oss

---
 include/mixer.h     |  7 +++++-
 include/pcm.h       |  1 +
 src/mixer/simple.c  | 57 +++++++++++++++++++++++++++++++++++++++++----
 src/pcm/pcm_share.c |  4 ++--
 4 files changed, 62 insertions(+), 7 deletions(-)

diff --git a/include/mixer.h b/include/mixer.h
index 305491c7..5b223ed1 100644
--- a/include/mixer.h
+++ b/include/mixer.h
@@ -105,6 +105,8 @@ int snd_mixer_selem_register(snd_mixer_t *mixer, void *arg,
 			     snd_mixer_class_t **classp);
 void snd_mixer_selem_get_id(snd_mixer_elem_t *element,
 			    snd_mixer_selem_id_t *id);
+const char *snd_mixer_selem_get_name(snd_mixer_elem_t *elem);
+unsigned int snd_mixer_selem_get_index(snd_mixer_elem_t *elem);
 snd_mixer_elem_t *snd_mixer_find_selem(snd_mixer_t *mixer,
 				       const snd_mixer_selem_id_t *id);
 
@@ -141,7 +143,10 @@ int snd_mixer_selem_set_playback_switch(snd_mixer_elem_t *elem, snd_mixer_selem_
 int snd_mixer_selem_set_capture_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int value);
 int snd_mixer_selem_set_playback_switch_all(snd_mixer_elem_t *elem, int value);
 int snd_mixer_selem_set_capture_switch_all(snd_mixer_elem_t *elem, int value);
-
+void snd_mixer_selem_set_playback_volume_range(snd_mixer_elem_t *elem, 
+					       long min, long max);
+void snd_mixer_selem_set_capture_volume_range(snd_mixer_elem_t *elem, 
+					      long min, long max);
 #ifdef __cplusplus
 }
 #endif
diff --git a/include/pcm.h b/include/pcm.h
index 920ce49e..4eb6ef0b 100644
--- a/include/pcm.h
+++ b/include/pcm.h
@@ -216,6 +216,7 @@ int snd_pcm_open(snd_pcm_t **pcm, const char *name,
 
 snd_pcm_type_t snd_pcm_type(snd_pcm_t *pcm);
 int snd_pcm_close(snd_pcm_t *pcm);
+int snd_pcm_poll_descriptors_count(snd_pcm_t *pcm, unsigned int *count);
 int snd_pcm_poll_descriptors(snd_pcm_t *pcm, struct pollfd *pfds, unsigned int space);
 int snd_pcm_nonblock(snd_pcm_t *pcm, int nonblock);
 int snd_pcm_async(snd_pcm_t *pcm, int sig, pid_t pid);
diff --git a/src/mixer/simple.c b/src/mixer/simple.c
index 62352833..6acf9473 100644
--- a/src/mixer/simple.c
+++ b/src/mixer/simple.c
@@ -75,6 +75,7 @@ typedef struct _selem {
 	unsigned int capture_group;
 	unsigned int caps;
 	struct {
+		unsigned int range: 1;	/* Forced range */
 		long min, max;
 		unsigned int channels;
 		long vol[32];
@@ -593,11 +594,15 @@ static int simple_update(snd_mixer_elem_t *melem)
 	}
 	simple->caps = caps;
 	simple->str[PLAY].channels = pchannels;
-	simple->str[PLAY].min = pmin;
-	simple->str[PLAY].max = pmax;
+	if (!simple->str[PLAY].range) {
+		simple->str[PLAY].min = pmin;
+		simple->str[PLAY].max = pmax;
+	}
 	simple->str[CAPT].channels = cchannels;
-	simple->str[CAPT].min = cmin;
-	simple->str[CAPT].max = cmax;
+	if (!simple->str[CAPT].range) {
+		simple->str[CAPT].min = cmin;
+		simple->str[CAPT].max = cmax;
+	}
 	return 0;
 }	   
 
@@ -900,6 +905,24 @@ void snd_mixer_selem_get_id(snd_mixer_elem_t *elem,
 	*id = s->id;
 }
 
+const char *snd_mixer_selem_get_name(snd_mixer_elem_t *elem)
+{
+	selem_t *s;
+	assert(elem);
+	assert(elem->type == SND_MIXER_ELEM_SIMPLE);
+	s = elem->private_data;
+	return s->id.name;
+}
+
+unsigned int snd_mixer_selem_get_index(snd_mixer_elem_t *elem)
+{
+	selem_t *s;
+	assert(elem);
+	assert(elem->type == SND_MIXER_ELEM_SIMPLE);
+	s = elem->private_data;
+	return s->id.index;
+}
+
 int snd_mixer_selem_is_playback_mono(snd_mixer_elem_t *elem)
 {
 	selem_t *s;
@@ -1367,3 +1390,29 @@ const char *snd_mixer_selem_channel_name(snd_mixer_selem_channel_id_t channel)
 	return p;
 }
 
+void snd_mixer_selem_set_playback_volume_range(snd_mixer_elem_t *elem, 
+					       long min, long max)
+{
+	selem_t *s;
+	assert(elem);
+	assert(elem->type == SND_MIXER_ELEM_SIMPLE);
+	s = elem->private_data;
+	assert(min != max);
+	s->str[PLAY].range = 1;
+	s->str[PLAY].min = min;
+	s->str[PLAY].max = max;
+}
+
+void snd_mixer_selem_set_capture_volume_range(snd_mixer_elem_t *elem, 
+					      long min, long max)
+{
+	selem_t *s;
+	assert(elem);
+	assert(elem->type == SND_MIXER_ELEM_SIMPLE);
+	s = elem->private_data;
+	assert(min != max);
+	s->str[CAPT].range = 1;
+	s->str[CAPT].min = min;
+	s->str[CAPT].max = max;
+}
+
diff --git a/src/pcm/pcm_share.c b/src/pcm/pcm_share.c
index 11b2c232..2e57eb7c 100644
--- a/src/pcm/pcm_share.c
+++ b/src/pcm/pcm_share.c
@@ -338,7 +338,7 @@ static snd_pcm_uframes_t _snd_pcm_share_slave_missing(snd_pcm_share_slave_t *sla
 	return missing;
 }
 
-void *snd_pcm_share_slave_thread(void *data)
+void *snd_pcm_share_thread(void *data)
 {
 	snd_pcm_share_slave_t *slave = data;
 	snd_pcm_t *spcm = slave->pcm;
@@ -1303,7 +1303,7 @@ int snd_pcm_share_open(snd_pcm_t **pcmp, const char *name, const char *sname,
 		pthread_cond_init(&slave->poll_cond, NULL);
 		list_add_tail(&slave->list, &slaves);
 		Pthread_mutex_lock(&slave->mutex);
-		err = pthread_create(&slave->thread, NULL, snd_pcm_share_slave_thread, slave);
+		err = pthread_create(&slave->thread, NULL, snd_pcm_share_thread, slave);
 		assert(err == 0);
 		Pthread_mutex_unlock(&slaves_mutex);
 	} else {
-- 
2.47.1