big s/polyp/pulse/g

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1033 fefdeb5f-60dc-0310-8127-8f9354f1896f

1 files changed, 156 insertions, 0 deletions

diff --git a/src/pulse/sample.c b/src/pulse/sample.c
new file mode 100644
index 000000000..2e055bf1b
--- /dev/null
+++ b/src/pulse/sample.c
@@ -0,0 +1,156 @@
+/* $Id$ */
+
+/***
+  This file is part of PulseAudio.
+ 
+  PulseAudio is free software; you can redistribute it and/or modify
+  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.
+ 
+  PulseAudio 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 Lesser General Public License
+  along with PulseAudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <assert.h>
+#include <math.h>
+#include <string.h>
+
+#include "sample.h"
+
+size_t pa_sample_size(const pa_sample_spec *spec) {
+    assert(spec);
+
+    switch (spec->format) {
+        case PA_SAMPLE_U8:
+        case PA_SAMPLE_ULAW:
+        case PA_SAMPLE_ALAW:
+            return 1;
+        case PA_SAMPLE_S16LE:
+        case PA_SAMPLE_S16BE:
+            return 2;
+        case PA_SAMPLE_FLOAT32LE:
+        case PA_SAMPLE_FLOAT32BE:
+            return 4;
+        default:
+            assert(0);
+            return 0;
+    }
+}
+
+size_t pa_frame_size(const pa_sample_spec *spec) {
+    assert(spec);
+
+    return pa_sample_size(spec) * spec->channels;
+}
+
+size_t pa_bytes_per_second(const pa_sample_spec *spec) {
+    assert(spec);
+    return spec->rate*pa_frame_size(spec);
+}
+
+pa_usec_t pa_bytes_to_usec(uint64_t length, const pa_sample_spec *spec) {
+    assert(spec);
+
+    return (pa_usec_t) (((double) length/pa_frame_size(spec)*1000000)/spec->rate);
+}
+
+size_t pa_usec_to_bytes(pa_usec_t t, const pa_sample_spec *spec) {
+    assert(spec);
+
+    return ((double) t * spec->rate / 1000000)*pa_frame_size(spec); 
+}
+
+int pa_sample_spec_valid(const pa_sample_spec *spec) {
+    assert(spec);
+
+    if (spec->rate <= 0 ||
+        spec->channels <= 0 ||
+        spec->channels > PA_CHANNELS_MAX ||
+        spec->format >= PA_SAMPLE_MAX ||
+        spec->format < 0)
+        return 0;
+
+    return 1;
+}
+
+int pa_sample_spec_equal(const pa_sample_spec*a, const pa_sample_spec*b) {
+    assert(a && b);
+
+    return (a->format == b->format) && (a->rate == b->rate) && (a->channels == b->channels);
+}
+
+const char *pa_sample_format_to_string(pa_sample_format_t f) {
+    static const char* const table[]= {
+        [PA_SAMPLE_U8] = "u8",
+        [PA_SAMPLE_ALAW] = "aLaw",
+        [PA_SAMPLE_ULAW] = "uLaw",
+        [PA_SAMPLE_S16LE] = "s16le",
+        [PA_SAMPLE_S16BE] = "s16be",
+        [PA_SAMPLE_FLOAT32LE] = "float32le",
+        [PA_SAMPLE_FLOAT32BE] = "float32be",
+    };
+
+    if (f >= PA_SAMPLE_MAX)
+        return NULL;
+
+    return table[f];
+}
+
+char *pa_sample_spec_snprint(char *s, size_t l, const pa_sample_spec *spec) {
+    assert(s && l && spec);
+    
+    if (!pa_sample_spec_valid(spec))
+        snprintf(s, l, "Invalid");
+    else
+        snprintf(s, l, "%s %uch %uHz", pa_sample_format_to_string(spec->format), spec->channels, spec->rate);
+
+    return s;
+}
+
+void pa_bytes_snprint(char *s, size_t l, unsigned v) {
+    if (v >= ((unsigned) 1024)*1024*1024)
+        snprintf(s, l, "%0.1f GiB", ((double) v)/1024/1024/1024);
+    else if (v >= ((unsigned) 1024)*1024)
+        snprintf(s, l, "%0.1f MiB", ((double) v)/1024/1024);
+    else if (v >= (unsigned) 1024)
+        snprintf(s, l, "%0.1f KiB", ((double) v)/1024);
+    else
+        snprintf(s, l, "%u B", (unsigned) v);
+}
+
+pa_sample_format_t pa_parse_sample_format(const char *format) {
+    
+    if (strcasecmp(format, "s16le") == 0)
+        return PA_SAMPLE_S16LE;
+    else if (strcasecmp(format, "s16be") == 0)
+        return PA_SAMPLE_S16BE;
+    else if (strcasecmp(format, "s16ne") == 0 || strcasecmp(format, "s16") == 0 || strcasecmp(format, "16") == 0)
+        return PA_SAMPLE_S16NE;
+    else if (strcasecmp(format, "u8") == 0 || strcasecmp(format, "8") == 0)
+        return PA_SAMPLE_U8;
+    else if (strcasecmp(format, "float32") == 0 || strcasecmp(format, "float32ne") == 0)
+        return PA_SAMPLE_FLOAT32;
+    else if (strcasecmp(format, "float32le") == 0)
+        return PA_SAMPLE_FLOAT32LE;
+    else if (strcasecmp(format, "float32be") == 0)
+        return PA_SAMPLE_FLOAT32BE;
+    else if (strcasecmp(format, "ulaw") == 0)
+        return PA_SAMPLE_ULAW;
+    else if (strcasecmp(format, "alaw") == 0)
+        return PA_SAMPLE_ALAW;
+
+    return -1;
+}