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Diffstat (limited to 'src/pulse/sample.c')
| -rw-r--r-- | src/pulse/sample.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/src/pulse/sample.c b/src/pulse/sample.c new file mode 100644 index 00000000..27c0df03 --- /dev/null +++ b/src/pulse/sample.c @@ -0,0 +1,185 @@ +/* $Id$ */ + +/*** + 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 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 <math.h> +#include <string.h> + +#include <pulsecore/core-util.h> +#include <pulsecore/macro.h> + +#include "sample.h" + +size_t pa_sample_size(const pa_sample_spec *spec) { + + static const size_t 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_assert(spec); + pa_assert(spec->format >= 0); + pa_assert(spec->format < PA_SAMPLE_MAX); + + return table[spec->format]; +} + +size_t pa_frame_size(const pa_sample_spec *spec) { + pa_assert(spec); + + return pa_sample_size(spec) * spec->channels; +} + +size_t pa_bytes_per_second(const pa_sample_spec *spec) { + pa_assert(spec); + return spec->rate*pa_frame_size(spec); +} + +pa_usec_t pa_bytes_to_usec(uint64_t length, const pa_sample_spec *spec) { + pa_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) { + pa_assert(spec); + + return (size_t) (((double) t * spec->rate / 1000000))*pa_frame_size(spec); +} + +int pa_sample_spec_valid(const pa_sample_spec *spec) { + pa_assert(spec); + + if (spec->rate <= 0 || + spec->rate > PA_RATE_MAX || + 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) { + pa_assert(a); + pa_assert(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", + [PA_SAMPLE_S32LE] = "s32le", + [PA_SAMPLE_S32BE] = "s32be", + }; + + if (f < 0 || f >= PA_SAMPLE_MAX) + 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); + pa_assert(spec); + + 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); + + 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_S32RE; + + return -1; +} |