diff options
Diffstat (limited to 'polyp/sample.c')
| -rw-r--r-- | polyp/sample.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/polyp/sample.c b/polyp/sample.c deleted file mode 100644 index f9d0c458..00000000 --- a/polyp/sample.c +++ /dev/null @@ -1,186 +0,0 @@ -/* $Id$ */ - -/*** - This file is part of polypaudio. - - polypaudio 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. - - polypaudio 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 polypaudio; 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_frame_size(const struct pa_sample_spec *spec) { - size_t b = 1; - assert(spec); - - switch (spec->format) { - case PA_SAMPLE_U8: - case PA_SAMPLE_ULAW: - case PA_SAMPLE_ALAW: - b = 1; - break; - case PA_SAMPLE_S16LE: - case PA_SAMPLE_S16BE: - b = 2; - break; - case PA_SAMPLE_FLOAT32LE: - case PA_SAMPLE_FLOAT32BE: - b = 4; - break; - default: - assert(0); - } - - return b * spec->channels; -} - -size_t pa_bytes_per_second(const struct pa_sample_spec *spec) { - assert(spec); - return spec->rate*pa_frame_size(spec); -} - -pa_usec_t pa_bytes_to_usec(uint64_t length, const struct pa_sample_spec *spec) { - assert(spec); - - return (pa_usec_t) (((double) length/pa_frame_size(spec)*1000000)/spec->rate); -} - -int pa_sample_spec_valid(const struct pa_sample_spec *spec) { - assert(spec); - - if (spec->rate <= 0 || spec->channels <= 0) - return 0; - - if (spec->format >= PA_SAMPLE_MAX || spec->format < 0) - return 0; - - return 1; -} - -int pa_sample_spec_equal(const struct pa_sample_spec*a, const struct 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(enum pa_sample_format 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 struct 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; -} - -pa_volume_t pa_volume_multiply(pa_volume_t a, pa_volume_t b) { - uint64_t p = a; - p *= b; - p /= PA_VOLUME_NORM; - - return (pa_volume_t) p; -} - -pa_volume_t pa_volume_from_dB(double f) { - if (f <= PA_DECIBEL_MININFTY) - return PA_VOLUME_MUTED; - - return (pa_volume_t) (pow(10, f/20)*PA_VOLUME_NORM); -} - -double pa_volume_to_dB(pa_volume_t v) { - if (v == PA_VOLUME_MUTED) - return PA_DECIBEL_MININFTY; - - 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); - else if (v >= ((unsigned) 1024)*1024) - snprintf(s, l, "%0.1f MB", ((double) v)/1024/1024); - else if (v >= (unsigned) 1024) - snprintf(s, l, "%0.1f KB", ((double) v)/1024); - else - snprintf(s, l, "%u B", (unsigned) v); -} - -enum pa_sample_format 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; -} |