mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-03 09:01:50 -05:00
dd10c98241
* implement inner loops using liboil * drop "typeid" stuff * add support for channel maps * add support for seperate volumes per channel * add support for hardware mixer settings (only module-oss implements this for now) * fix a lot of types for _t suffix git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@463 fefdeb5f-60dc-0310-8127-8f9354f1896f
120 lines
4.4 KiB
C
120 lines
4.4 KiB
C
#ifndef foosamplehfoo
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#define foosamplehfoo
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/* $Id$ */
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/***
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This file is part of polypaudio.
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polypaudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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polypaudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with polypaudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#include <inttypes.h>
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#include <sys/types.h>
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#include <math.h>
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#include <polyp/cdecl.h>
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/** \file
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* Constants and routines for sample type handling */
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PA_C_DECL_BEGIN
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/* Maximum allowed channels */
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#define PA_CHANNELS_MAX 16
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/** Sample format */
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typedef enum pa_sample_format {
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PA_SAMPLE_U8, /**< Unsigned 8 Bit PCM */
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PA_SAMPLE_ALAW, /**< 8 Bit a-Law */
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PA_SAMPLE_ULAW, /**< 8 Bit mu-Law */
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PA_SAMPLE_S16LE, /**< Signed 16 Bit PCM, little endian (PC) */
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PA_SAMPLE_S16BE, /**< Signed 16 Bit PCM, big endian */
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PA_SAMPLE_FLOAT32LE, /**< 32 Bit IEEE floating point, little endian, range -1..1 */
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PA_SAMPLE_FLOAT32BE, /**< 32 Bit IEEE floating point, big endian, range -1..1 */
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PA_SAMPLE_MAX, /**< Upper limit of valid sample types */
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PA_SAMPLE_INVALID = -1 /**< An invalid value */
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} pa_sample_format_t;
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#ifdef WORDS_BIGENDIAN
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/** Signed 16 Bit PCM, native endian */
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#define PA_SAMPLE_S16NE PA_SAMPLE_S16BE
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/** 32 Bit IEEE floating point, native endian */
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#define PA_SAMPLE_FLOAT32NE PA_SAMPLE_FLOAT32BE
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/** Signed 16 Bit PCM reverse endian */
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#define PA_SAMPLE_S16RE PA_SAMPLE_S16LE
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/** 32 Bit IEEE floating point, reverse endian */
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#define PA_SAMPLE_FLOAT32RE PA_SAMPLE_FLOAT32LE
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#else
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/** Signed 16 Bit PCM, native endian */
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#define PA_SAMPLE_S16NE PA_SAMPLE_S16LE
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/** 32 Bit IEEE floating point, native endian */
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#define PA_SAMPLE_FLOAT32NE PA_SAMPLE_FLOAT32LE
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/** Signed 16 Bit PCM reverse endian */
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#define PA_SAMPLE_S16RE PA_SAMPLE_S16BE
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/** 32 Bit IEEE floating point, reverse endian */
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#define PA_SAMPLE_FLOAT32RE PA_SAMPLE_FLOAT32BE
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#endif
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/** A Shortcut for PA_SAMPLE_FLOAT32NE */
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#define PA_SAMPLE_FLOAT32 PA_SAMPLE_FLOAT32NE
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/** A sample format and attribute specification */
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typedef struct pa_sample_spec {
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pa_sample_format_t format; /**< The sample format */
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uint32_t rate; /**< The sample rate. (e.g. 44100) */
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uint8_t channels; /**< Audio channels. (1 for mono, 2 for stereo, ...) */
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} pa_sample_spec;
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/** Type for usec specifications (unsigned). May be either 32 or 64 bit, depending on the architecture */
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typedef uint64_t pa_usec_t;
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/** Return the amount of bytes playback of a second of audio with the specified sample type takes */
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size_t pa_bytes_per_second(const pa_sample_spec *spec);
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/** Return the size of a frame with the specific sample type */
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size_t pa_frame_size(const pa_sample_spec *spec);
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/** Return the size of a sample with the specific sample type */
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size_t pa_sample_size(const pa_sample_spec *spec);
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/** Calculate the time the specified bytes take to play with the specified sample type */
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pa_usec_t pa_bytes_to_usec(uint64_t length, const pa_sample_spec *spec);
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/** Return non-zero when the sample type specification is valid */
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int pa_sample_spec_valid(const pa_sample_spec *spec);
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/** Return non-zero when the two sample type specifications match */
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int pa_sample_spec_equal(const pa_sample_spec*a, const pa_sample_spec*b);
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/* Return a descriptive string for the specified sample format. \since 0.8 */
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const char *pa_sample_format_to_string(pa_sample_format_t f);
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/** Parse a sample format text. Inverse of pa_sample_format_to_string() */
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pa_sample_format_t pa_parse_sample_format(const char *format);
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/** Maximum required string length for pa_sample_spec_snprint() */
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#define PA_SAMPLE_SPEC_SNPRINT_MAX 32
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/** Pretty print a sample type specification to a string */
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char* pa_sample_spec_snprint(char *s, size_t l, const pa_sample_spec *spec);
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/** Pretty print a byte size value. (i.e. "2.5 MB") */
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void pa_bytes_snprint(char *s, size_t l, unsigned v);
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PA_C_DECL_END
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#endif
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