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Initial version of simple pcm + mixer interfaces
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Jaroslav Kysela
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114
include/mixer_simple.h
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114
include/mixer_simple.h
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/**
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* \file <alsa/mixer_simple.h>
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* \brief Application interface library for the ALSA driver
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* \author Jaroslav Kysela <perex@suse.cz>
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* \date 2003
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*
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* Application interface library for the ALSA driver.
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* See the \ref mixer_simple page for more details.
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*
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*
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* This library 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
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef __ALSA_MIXER_SIMPLE_H
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#define __ALSA_MIXER_SIMPLE_H
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/** Simple Mixer latency type */
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enum snds_mixer_io_type {
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/** master volume - left (0-1000) */
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SNDS_MIO_MASTER_LVOL = 0,
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/** master volume - right (0-1000) */
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SNDS_MIO_MASTER_RVOL,
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/** master volume - left mute (0 = off, 1 = on) */
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SNDS_MIO_MASTER_LMUTE,
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/** master volume - right mute (0 = off, 1 = on) */
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SNDS_MIO_MASTER_RMUTE,
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/** pcm volume - left (0-1000) */
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SNDS_MIO_Mixer_LVOL,
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/** pcm volume - right (0-1000) */
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SNDS_MIO_Mixer_RVOL,
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/** pcm volume - left mute (0 = off, 1 = on) */
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SNDS_MIO_Mixer_LMUTE,
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/** pcm volume - right mute (0 = off, 1 = on) */
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SNDS_MIO_Mixer_RMUTE,
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/** CD volume - left (0-1000) */
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SNDS_MIO_CD_LVOL,
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/** CD volume - right (0-1000) */
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SNDS_MIO_CD_RVOL,
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/** CD volume - left mute (0 = off, 1 = on) */
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SNDS_MIO_CD_LMUTE,
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/** CD volume - right mute (0 = off, 1 = on) */
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SNDS_MIO_CD_RMUTE,
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/** AUX volume - left (0-1000) */
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SNDS_MIO_AUX_LVOL,
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/** CD volume - right (0-1000) */
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SNDS_MIO_AUX_RVOL,
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/** CD volume - left mute (0 = off, 1 = on) */
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SNDS_MIO_AUX_LMUTE,
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/** CD volume - right mute (0 = off, 1 = on) */
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SNDS_MIO_AUX_RMUTE,
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/** capture gain - left (0-1000) */
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SNDS_MIO_CGAIN_LVOL = 0x1000,
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/** capture gain - right (0-1000) */
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SNDS_MIO_CGAIN_RVOL,
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/** capture source - mic switch (0 = off, 1 = on) */
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SNDS_MIO_CSOURCE_MIC = 0x1100,
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/** capture source - line switch (0 = off, 1 = on)*/
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SNDS_MIO_CSOURCE_LINE,
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/** capture source - CD switch (0 = off, 1 = on) */
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SNDS_MIO_CSOURCE_CD,
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/** capture source - AUX switch (0 = off, 1 = on) */
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SNDS_MIO_CSOURCE_AUX,
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/** capture source - mix switch (0 = off, 1 = on) */
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SNDS_MIO_CSOURCE_MIX
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};
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \defgroup Mixer_simple Mixer Simple Interface
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* See the \ref mixer_simple page for more details.
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* \{
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*/
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int snds_mixer_open(snds_mixer_t **pcm, const char *playback_name, const char *capture_name);
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int snds_mixer_open_lconf(snds_mixer_t **pcm, const char *plaback_name, const char *capture_name, snd_config_t *lconf);
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int snds_mixer_close(snds_mixer_t *pcm);
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int snds_mixer_poll_descriptors_count(snds_mixer_t *pcm);
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int snds_mixer_poll_descriptors(snds_mixer_t *pcm, struct pollfd *pfds, unsigned int space);
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int snds_mixer_poll_descriptors_revents(snds_mixer_t *pcm, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
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int snds_mixer_io_get(snds_mixer_t *pcm, enum snds_mixer_io_type type, int *val);
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int snds_mixer_io_set(snds_mixer_t *pcm, enum snds_mixer_io_type type, int val);
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int snds_mixer_io_change(snds_mixer_t *mixer, enum snds_mixer_io_type *changed, int changed_array_size);
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/** \} */
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#ifdef __cplusplus
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}
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#endif
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#endif /* __ALSA_MIXER_SIMPLE_H */
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117
include/pcm_simple.h
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117
include/pcm_simple.h
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/**
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* \file <alsa/pcm_simple.h>
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* \brief Application interface library for the ALSA driver
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* \author Jaroslav Kysela <perex@suse.cz>
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* \date 2003
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*
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* Application interface library for the ALSA driver.
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* See the \ref pcm_simple page for more details.
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*
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*
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* This library 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
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef __ALSA_PCM_SIMPLE_H
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#define __ALSA_PCM_SIMPLE_H
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#include <alsa/pcm.h>
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/** Simple PCM latency type */
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enum snds_pcm_latency_type {
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/** normal latency - for standard playback or capture
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(estimated latency in one direction 350ms) */
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SNDS_PCM_LATENCY_NORMAL = 0,
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/** medium latency - software phones etc.
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(estimated latency in one direction 50ms) */
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SNDS_PCM_LATENCY_MEDIUM,
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/** realtime latency - realtime applications (effect processors etc.)
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(estimated latency in one direction 5ms) */
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SNDS_PCM_LATENCY_REALTIME
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};
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/** Simple PCM access type */
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enum snds_pcm_access_type {
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/** interleaved access - channels are interleaved without any gaps among samples */
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SNDS_PCM_ACCESS_INTERLEAVED = 0,
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/** noninterleaved access - channels are separate without any gaps among samples */
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SNDS_PCM_ACCESS_NONINTERLEAVED
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};
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \defgroup PCM_simple PCM Simple Interface
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* See the \ref pcm_simple page for more details.
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* \{
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*/
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int snds_pcm_open(snds_pcm_t **pcm, const char *playback_name, const char *capture_name);
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int snds_pcm_open_lconf(snds_pcm_t **pcm, const char *plaback_name, const char *capture_name, snd_config_t *lconf);
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int snds_pcm_close(snds_pcm_t *pcm);
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int snds_pcm_poll_descriptors_count(snds_pcm_t *pcm);
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int snds_pcm_poll_descriptors(snds_pcm_t *pcm, struct pollfd *pfds, unsigned int space);
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int snds_pcm_poll_descriptors_revents(snds_pcm_t *pcm, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
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int snds_pcm_start(snds_pcm_t *pcm);
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int snds_pcm_drop(snds_pcm_t *pcm);
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int snds_pcm_drain(snds_pcm_t *pcm);
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int snds_pcm_delay(snds_pcm_t *pcm, snd_pcm_sframes_t *delayp);
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int snds_pcm_resume(snd_pcm_t *pcm);
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int snds_pcm_wait(snds_pcm_t *pcm, int timeout);
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snd_pcm_t *snds_pcm_raw_playback(snds_pcm_t *pcm);
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snd_pcm_t *snds_pcm_raw_capture(snds_pcm_t *pcm);
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/**
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* \defgroup PCM_simple_params Parameters Functions
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* \ingroup PCM_simple
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* See the \ref pcm_simple page for more details.
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* \{
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*/
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int snds_pcm_param_rate(snds_pcm_t *pcm, unsigned int rate, unsigned int *used_rate);
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int snds_pcm_param_channels(snds_pcm_t *pcm, unsigned int channels, unsigned int *used_channels);
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int snds_pcm_param_format(snds_pcm_t *pcm, snd_pcm_format_t format, snd_pcm_subformat_t subformat);
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int snds_pcm_param_latency(snds_pcm_t *pcm, enum snds_pcm_latency_type latency);
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int snds_pcm_param_access(snds_pcm_t *pcm, enum snds_pcm_access_type access);
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/** \} */
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/**
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* \defgroup PCM_simple_access Ring Buffer I/O Functions
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* \ingroup PCM_simple
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* See the \ref pcm_simple page for more details.
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* \{
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*/
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/* playback */
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int snds_pcm_pio_ibegin(snds_pcm_t *pcm, void *ring_buffer, snd_pcm_uframes_t *frames);
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int snds_pcm_pio_iend(snds_pcm_t *pcm, snd_pcm_uframes_t frames);
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int snds_pcm_pio_nbegin(snds_pcm_t *pcm, void **ring_buffer, snd_pcm_uframes_t *frames);
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int snds_pcm_pio_nend(snds_pcm_t *pcm, snd_pcm_uframes_t frames);
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/* capture */
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int snds_pcm_cio_ibegin(snds_pcm_t *pcm, void *ring_buffer, snd_pcm_uframes_t *frames);
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int snds_pcm_cio_iend(snds_pcm_t *pcm, snd_pcm_uframes_t frames);
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int snds_pcm_cio_nbegin(snds_pcm_t *pcm, void **ring_buffer, snd_pcm_uframes_t *frames);
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int snds_pcm_cio_nend(snds_pcm_t *pcm, snd_pcm_uframes_t frames);
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/** \} */
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#ifdef __cplusplus
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}
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#endif
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#endif /* __ALSA_PCM_SIMPLE_H */
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