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https://gitee.com/openharmony/third_party_alsa-lib
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87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
/**
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* \file include/output.h
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* \brief Application interface library for the ALSA driver
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* \author Jaroslav Kysela <perex@perex.cz>
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* \author Abramo Bagnara <abramo@alsa-project.org>
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* \author Takashi Iwai <tiwai@suse.de>
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* \date 1998-2001
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*
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* Application interface library for the ALSA driver
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifndef __ALSA_OUTPUT_H
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#define __ALSA_OUTPUT_H
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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 Output Output Interface
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*
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* The output functions present an interface similar to the stdio functions
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* on top of different underlying output destinations.
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*
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* Many PCM debugging functions (\c snd_pcm_xxx_dump_xxx) use such an output
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* handle to be able to write not only to the screen but also to other
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* destinations, e.g. to files or to memory buffers.
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*
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* \{
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*/
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/**
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* \brief Internal structure for an output object.
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*
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* The ALSA library uses a pointer to this structure as a handle to an
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* output object. Applications don't access its contents directly.
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*/
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typedef struct _snd_output snd_output_t;
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/** Output type. */
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typedef enum _snd_output_type {
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/** Output to a stdio stream. */
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SND_OUTPUT_STDIO,
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/** Output to a memory buffer. */
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SND_OUTPUT_BUFFER
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} snd_output_type_t;
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int snd_output_stdio_open(snd_output_t **outputp, const char *file, const char *mode);
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int snd_output_stdio_attach(snd_output_t **outputp, FILE *fp, int _close);
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int snd_output_buffer_open(snd_output_t **outputp);
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size_t snd_output_buffer_string(snd_output_t *output, char **buf);
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int snd_output_close(snd_output_t *output);
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int snd_output_printf(snd_output_t *output, const char *format, ...)
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#ifndef DOC_HIDDEN
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__attribute__ ((format (printf, 2, 3)))
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#endif
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;
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int snd_output_vprintf(snd_output_t *output, const char *format, va_list args);
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int snd_output_puts(snd_output_t *output, const char *str);
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int snd_output_putc(snd_output_t *output, int c);
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int snd_output_flush(snd_output_t *output);
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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_OUTPUT_H */
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