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-rw-r--r--src/pulse/sample.c285
1 files changed, 285 insertions, 0 deletions
diff --git a/src/pulse/sample.c b/src/pulse/sample.c
new file mode 100644
index 0000000..ff77985
--- /dev/null
+++ b/src/pulse/sample.c
@@ -0,0 +1,285 @@
+/***
+ This file is part of PulseAudio.
+
+ Copyright 2004-2006 Lennart Poettering
+ Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+ 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 2.1 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, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <string.h>
+
+#include <pulse/timeval.h>
+
+#include <pulsecore/core-util.h>
+#include <pulsecore/i18n.h>
+#include <pulsecore/macro.h>
+
+#include "sample.h"
+
+static const size_t size_table[] = {
+ [PA_SAMPLE_U8] = 1,
+ [PA_SAMPLE_ULAW] = 1,
+ [PA_SAMPLE_ALAW] = 1,
+ [PA_SAMPLE_S16LE] = 2,
+ [PA_SAMPLE_S16BE] = 2,
+ [PA_SAMPLE_FLOAT32LE] = 4,
+ [PA_SAMPLE_FLOAT32BE] = 4,
+ [PA_SAMPLE_S32LE] = 4,
+ [PA_SAMPLE_S32BE] = 4,
+ [PA_SAMPLE_S24LE] = 3,
+ [PA_SAMPLE_S24BE] = 3,
+ [PA_SAMPLE_S24_32LE] = 4,
+ [PA_SAMPLE_S24_32BE] = 4
+};
+
+size_t pa_sample_size_of_format(pa_sample_format_t f) {
+ pa_assert(pa_sample_format_valid(f));
+
+ return size_table[f];
+}
+
+size_t pa_sample_size(const pa_sample_spec *spec) {
+ pa_assert(spec);
+ pa_assert(pa_sample_spec_valid(spec));
+
+ return size_table[spec->format];
+}
+
+size_t pa_frame_size(const pa_sample_spec *spec) {
+ pa_assert(spec);
+ pa_assert(pa_sample_spec_valid(spec));
+
+ return size_table[spec->format] * spec->channels;
+}
+
+size_t pa_bytes_per_second(const pa_sample_spec *spec) {
+ pa_assert(spec);
+ pa_assert(pa_sample_spec_valid(spec));
+
+ return spec->rate * size_table[spec->format] * spec->channels;
+}
+
+pa_usec_t pa_bytes_to_usec(uint64_t length, const pa_sample_spec *spec) {
+ pa_assert(spec);
+ pa_assert(pa_sample_spec_valid(spec));
+
+ return (((pa_usec_t) (length / (size_table[spec->format] * spec->channels)) * PA_USEC_PER_SEC) / spec->rate);
+}
+
+size_t pa_usec_to_bytes(pa_usec_t t, const pa_sample_spec *spec) {
+ pa_assert(spec);
+ pa_assert(pa_sample_spec_valid(spec));
+
+ return (size_t) (((t * spec->rate) / PA_USEC_PER_SEC)) * (size_table[spec->format] * spec->channels);
+}
+
+pa_sample_spec* pa_sample_spec_init(pa_sample_spec *spec) {
+ pa_assert(spec);
+
+ spec->format = PA_SAMPLE_INVALID;
+ spec->rate = 0;
+ spec->channels = 0;
+
+ return spec;
+}
+
+int pa_sample_format_valid(unsigned format) {
+ return format < PA_SAMPLE_MAX;
+}
+
+int pa_sample_rate_valid(uint32_t rate) {
+ /* The extra 1% is due to module-loopback: it temporarily sets
+ * a higher-than-nominal rate to get rid of excessive buffer
+ * latency */
+ return rate > 0 && rate <= PA_RATE_MAX * 101 / 100;
+}
+
+int pa_channels_valid(uint8_t channels) {
+ return channels > 0 && channels <= PA_CHANNELS_MAX;
+}
+
+int pa_sample_spec_valid(const pa_sample_spec *spec) {
+ pa_assert(spec);
+
+ if (PA_UNLIKELY(!pa_sample_rate_valid(spec->rate) ||
+ !pa_channels_valid(spec->channels) ||
+ !pa_sample_format_valid(spec->format)))
+ return 0;
+
+ return 1;
+}
+
+int pa_sample_spec_equal(const pa_sample_spec*a, const pa_sample_spec*b) {
+ pa_assert(a);
+ pa_assert(b);
+
+ pa_return_val_if_fail(pa_sample_spec_valid(a), 0);
+
+ if (PA_UNLIKELY(a == b))
+ return 1;
+
+ pa_return_val_if_fail(pa_sample_spec_valid(b), 0);
+
+ 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",
+ [PA_SAMPLE_S32LE] = "s32le",
+ [PA_SAMPLE_S32BE] = "s32be",
+ [PA_SAMPLE_S24LE] = "s24le",
+ [PA_SAMPLE_S24BE] = "s24be",
+ [PA_SAMPLE_S24_32LE] = "s24-32le",
+ [PA_SAMPLE_S24_32BE] = "s24-32be",
+ };
+
+ if (!pa_sample_format_valid(f))
+ return NULL;
+
+ return table[f];
+}
+
+char *pa_sample_spec_snprint(char *s, size_t l, const pa_sample_spec *spec) {
+ pa_assert(s);
+ pa_assert(l > 0);
+ pa_assert(spec);
+
+ pa_init_i18n();
+
+ if (!pa_sample_spec_valid(spec))
+ pa_snprintf(s, l, _("(invalid)"));
+ else
+ pa_snprintf(s, l, _("%s %uch %uHz"), pa_sample_format_to_string(spec->format), spec->channels, spec->rate);
+
+ return s;
+}
+
+char* pa_bytes_snprint(char *s, size_t l, unsigned v) {
+ pa_assert(s);
+ pa_assert(l > 0);
+
+ pa_init_i18n();
+
+ if (v >= ((unsigned) 1024)*1024*1024)
+ pa_snprintf(s, l, _("%0.1f GiB"), ((double) v)/1024/1024/1024);
+ else if (v >= ((unsigned) 1024)*1024)
+ pa_snprintf(s, l, _("%0.1f MiB"), ((double) v)/1024/1024);
+ else if (v >= (unsigned) 1024)
+ pa_snprintf(s, l, _("%0.1f KiB"), ((double) v)/1024);
+ else
+ pa_snprintf(s, l, _("%u B"), (unsigned) v);
+
+ return s;
+}
+
+pa_sample_format_t pa_parse_sample_format(const char *format) {
+ pa_assert(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, "s16re") == 0)
+ return PA_SAMPLE_S16RE;
+ else if (strcasecmp(format, "u8") == 0 || strcasecmp(format, "8") == 0)
+ return PA_SAMPLE_U8;
+ else if (strcasecmp(format, "float32") == 0 || strcasecmp(format, "float32ne") == 0 || strcasecmp(format, "float") == 0)
+ return PA_SAMPLE_FLOAT32NE;
+ else if (strcasecmp(format, "float32re") == 0)
+ return PA_SAMPLE_FLOAT32RE;
+ 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 || strcasecmp(format, "mulaw") == 0)
+ return PA_SAMPLE_ULAW;
+ else if (strcasecmp(format, "alaw") == 0)
+ return PA_SAMPLE_ALAW;
+ else if (strcasecmp(format, "s32le") == 0)
+ return PA_SAMPLE_S32LE;
+ else if (strcasecmp(format, "s32be") == 0)
+ return PA_SAMPLE_S32BE;
+ else if (strcasecmp(format, "s32ne") == 0 || strcasecmp(format, "s32") == 0 || strcasecmp(format, "32") == 0)
+ return PA_SAMPLE_S32NE;
+ else if (strcasecmp(format, "s32re") == 0)
+ return PA_SAMPLE_S24RE;
+ else if (strcasecmp(format, "s24le") == 0)
+ return PA_SAMPLE_S24LE;
+ else if (strcasecmp(format, "s24be") == 0)
+ return PA_SAMPLE_S24BE;
+ else if (strcasecmp(format, "s24ne") == 0 || strcasecmp(format, "s24") == 0 || strcasecmp(format, "24") == 0)
+ return PA_SAMPLE_S24NE;
+ else if (strcasecmp(format, "s24re") == 0)
+ return PA_SAMPLE_S24RE;
+ else if (strcasecmp(format, "s24-32le") == 0)
+ return PA_SAMPLE_S24_32LE;
+ else if (strcasecmp(format, "s24-32be") == 0)
+ return PA_SAMPLE_S24_32BE;
+ else if (strcasecmp(format, "s24-32ne") == 0 || strcasecmp(format, "s24-32") == 0)
+ return PA_SAMPLE_S24_32NE;
+ else if (strcasecmp(format, "s24-32re") == 0)
+ return PA_SAMPLE_S24_32RE;
+
+ return PA_SAMPLE_INVALID;
+}
+
+int pa_sample_format_is_le(pa_sample_format_t f) {
+ pa_assert(pa_sample_format_valid(f));
+
+ switch (f) {
+ case PA_SAMPLE_S16LE:
+ case PA_SAMPLE_S24LE:
+ case PA_SAMPLE_S32LE:
+ case PA_SAMPLE_S24_32LE:
+ case PA_SAMPLE_FLOAT32LE:
+ return 1;
+
+ case PA_SAMPLE_S16BE:
+ case PA_SAMPLE_S24BE:
+ case PA_SAMPLE_S32BE:
+ case PA_SAMPLE_S24_32BE:
+ case PA_SAMPLE_FLOAT32BE:
+ return 0;
+
+ default:
+ return -1;
+ }
+}
+
+int pa_sample_format_is_be(pa_sample_format_t f) {
+ int r;
+
+ if ((r = pa_sample_format_is_le(f)) < 0)
+ return r;
+
+ return !r;
+}
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