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* \file include/output.h
* \brief Application interface library for the ALSA driver
* \author Jaroslav Kysela <>
* \author Abramo Bagnara <>
* \author Takashi Iwai <>
* \date 1998-2001
* Application interface library for the ALSA driver
* This library 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 2.1 of
* the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#ifndef __ALSA_OUTPUT_H
#define __ALSA_OUTPUT_H
#ifdef __cplusplus
extern "C" {
* \defgroup Output Output Interface
* The output functions present an interface similar to the stdio functions
* on top of different underlying output destinations.
* Many PCM debugging functions (\c snd_pcm_xxx_dump_xxx) use such an output
* handle to be able to write not only to the screen but also to other
* destinations, e.g. to files or to memory buffers.
* \{
* \brief Internal structure for an output object.
* The ALSA library uses a pointer to this structure as a handle to an
* output object. Applications don't access its contents directly.
typedef struct _snd_output snd_output_t;
/** Output type. */
typedef enum _snd_output_type {
/** Output to a stdio stream. */
/** Output to a memory buffer. */
} snd_output_type_t;
int snd_output_stdio_open(snd_output_t **outputp, const char *file, const char *mode);
int snd_output_stdio_attach(snd_output_t **outputp, FILE *fp, int _close);
int snd_output_buffer_open(snd_output_t **outputp);
size_t snd_output_buffer_string(snd_output_t *output, char **buf);
int snd_output_close(snd_output_t *output);
int snd_output_printf(snd_output_t *output, const char *format, ...)
#ifndef DOC_HIDDEN
__attribute__ ((format (printf, 2, 3)))
int snd_output_vprintf(snd_output_t *output, const char *format, va_list args);
int snd_output_puts(snd_output_t *output, const char *str);
int snd_output_putc(snd_output_t *output, int c);
int snd_output_flush(snd_output_t *output);
/** \} */
#ifdef __cplusplus
#endif /* __ALSA_OUTPUT_H */