Make the whole stuff LGPL only

[pulseaudio] / polyp / sample.c

diff --git a/polyp/sample.c b/polyp/sample.c
index 65ae8ff387c3b134d1181612a24ac3384ccf79df..978a3d6aa27a54f1c9135d9ddf38c888a2bfcf1d 100644 (file)
--- a/polyp/sample.c
+++ b/polyp/sample.c
@@ -4,7 +4,7 @@
   This file is part of polypaudio.
  
   polypaudio is free software; you can redistribute it and/or modify
-  it under the terms of the GNU General Public License as published
+  it under the terms of the GNU Lesser General Public License as published
   by the Free Software Foundation; either version 2 of the License,
   or (at your option) any later version.
  
@@ -13,7 +13,7 @@
   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
+  You should have received a copy of the GNU Lesser General Public License
   along with polypaudio; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
   USA.
@@ -26,6 +26,7 @@
 #include <stdio.h>
 #include <assert.h>
 #include <math.h>
+#include <string.h>
 
 #include "sample.h"
 
@@ -68,10 +69,10 @@ pa_usec_t pa_bytes_to_usec(uint64_t length, const struct pa_sample_spec *spec) {
 int pa_sample_spec_valid(const struct pa_sample_spec *spec) {
     assert(spec);
 
-    if (!spec->rate || !spec->channels)
+    if (spec->rate <= 0 || spec->channels <= 0)
         return 0;
 
-    if (spec->format >= PA_SAMPLE_MAX)
+    if (spec->format >= PA_SAMPLE_MAX || spec->format < 0)
         return 0;
 
     return 1;
@@ -124,6 +125,22 @@ double pa_volume_to_dB(pa_volume_t v) {
     return 20*log10((double) v/PA_VOLUME_NORM);
 }
 
+#define USER_DECIBEL_RANGE 30
+
+double pa_volume_to_user(pa_volume_t v) {
+    double dB = pa_volume_to_dB(v);
+
+    return dB < -USER_DECIBEL_RANGE ? 0 : dB/USER_DECIBEL_RANGE+1;
+}
+
+pa_volume_t pa_volume_from_user(double v) {
+
+    if (v <= 0)
+        return PA_VOLUME_MUTED;
+    
+    return pa_volume_from_dB((v-1)*USER_DECIBEL_RANGE);
+}
+
 void pa_bytes_snprint(char *s, size_t l, unsigned v) {
     if (v >= ((unsigned) 1024)*1024*1024)
         snprintf(s, l, "%0.1f GB", ((double) v)/1024/1024/1024);
@@ -134,3 +151,27 @@ void pa_bytes_snprint(char *s, size_t l, unsigned v) {
     else
         snprintf(s, l, "%u B", (unsigned) v);
 }
+
+enum pa_sample_format pa_parse_sample_format(const char *format) {
+    
+    if (strcmp(format, "s16le") == 0)
+        return PA_SAMPLE_S16LE;
+    else if (strcmp(format, "s16be") == 0)
+        return PA_SAMPLE_S16BE;
+    else if (strcmp(format, "s16ne") == 0 || strcmp(format, "s16") == 0 || strcmp(format, "16") == 0)
+        return PA_SAMPLE_S16NE;
+    else if (strcmp(format, "u8") == 0 || strcmp(format, "8") == 0)
+        return PA_SAMPLE_U8;
+    else if (strcmp(format, "float32") == 0 || strcmp(format, "float32ne") == 0)
+        return PA_SAMPLE_FLOAT32;
+    else if (strcmp(format, "float32le") == 0)
+        return PA_SAMPLE_FLOAT32LE;
+    else if (strcmp(format, "float32be") == 0)
+        return PA_SAMPLE_FLOAT32BE;
+    else if (strcmp(format, "ulaw") == 0)
+        return PA_SAMPLE_ULAW;
+    else if (strcmp(format, "alaw") == 0)
+        return PA_SAMPLE_ALAW;
+
+    return -1;
+}