1 | //sample.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010 |
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5 | * The code (may) include prototypes and comments (and maybe |
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6 | * other code fragements) from libpulse*. They are mostly copyrighted by: |
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7 | * Lennart Poettering <poettering@users.sourceforge.net> and |
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8 | * Pierre Ossman <drzeus@drzeus.cx> |
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9 | * |
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10 | * This file is part of libroarpulse a part of RoarAudio, |
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11 | * a cross-platform sound system for both, home and professional use. |
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12 | * See README for details. |
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13 | * |
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14 | * This file is free software; you can redistribute it and/or modify |
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15 | * it under the terms of the GNU General Public License version 3 |
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16 | * as published by the Free Software Foundation. |
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17 | * |
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18 | * RoarAudio is distributed in the hope that it will be useful, |
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19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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21 | * GNU General Public License for more details. |
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22 | * |
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23 | * You should have received a copy of the GNU General Public License |
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24 | * along with this software; see the file COPYING. If not, write to |
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25 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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26 | * |
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27 | * NOTE for everyone want's to change something and send patches: |
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28 | * read README and HACKING! There a addition information on |
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29 | * the license of this document you need to read before you send |
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30 | * any patches. |
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31 | * |
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32 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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33 | * or libpulse*: |
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34 | * The libs libroaresd, libroararts and libroarpulse link this libroar |
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35 | * and are therefore GPL. Because of this it may be illigal to use |
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36 | * them with any software that uses libesd, libartsc or libpulse*. |
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37 | */ |
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38 | |
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39 | #include <libroarpulse/libroarpulse.h> |
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40 | |
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41 | /** Return the amount of bytes playback of a second of audio with the specified sample type takes */ |
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42 | size_t pa_bytes_per_second(const pa_sample_spec *spec); |
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43 | |
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44 | /** Return the size of a frame with the specific sample type */ |
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45 | size_t pa_frame_size(const pa_sample_spec *spec); |
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46 | |
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47 | /** Return the size of a sample with the specific sample type */ |
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48 | size_t pa_sample_size(const pa_sample_spec *spec); |
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49 | |
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50 | /** Calculate the time the specified bytes take to play with the specified sample type */ |
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51 | pa_usec_t pa_bytes_to_usec(uint64_t length, const pa_sample_spec *spec); |
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52 | |
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53 | /** Calculates the number of bytes that are required for the specified time. \since 0.9 */ |
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54 | size_t pa_usec_to_bytes(pa_usec_t t, const pa_sample_spec *spec); |
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55 | |
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56 | /** Return non-zero when the sample type specification is valid */ |
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57 | int pa_sample_spec_valid(const pa_sample_spec *spec); |
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58 | |
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59 | /** Return non-zero when the two sample type specifications match */ |
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60 | int pa_sample_spec_equal(const pa_sample_spec*a, const pa_sample_spec*b); |
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61 | |
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62 | /** Return a descriptive string for the specified sample format. \since 0.8 */ |
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63 | const char *pa_sample_format_to_string(pa_sample_format_t f); |
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64 | |
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65 | /** Parse a sample format text. Inverse of pa_sample_format_to_string() */ |
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66 | pa_sample_format_t pa_parse_sample_format(const char *format); |
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67 | |
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68 | /** Maximum required string length for pa_sample_spec_snprint() */ |
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69 | #define PA_SAMPLE_SPEC_SNPRINT_MAX 32 |
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70 | |
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71 | /** Pretty print a sample type specification to a string */ |
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72 | char* pa_sample_spec_snprint(char *s, size_t l, const pa_sample_spec *spec); |
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73 | |
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74 | /** Pretty print a byte size value. (i.e. "2.5 MiB") */ |
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75 | char* pa_bytes_snprint(char *s, size_t l, unsigned v); |
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76 | |
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77 | //ll |
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