autopm/ramdisk/usr/local/aplay/include/alsa/output.h

   1 /**
   2  * \file include/output.h
   3  * \brief Application interface library for the ALSA driver
   4  * \author Jaroslav Kysela <perex@perex.cz>
   5  * \author Abramo Bagnara <abramo@alsa-project.org>
   6  * \author Takashi Iwai <tiwai@suse.de>
   7  * \date 1998-2001
   8  *
   9  * Application interface library for the ALSA driver
  10  */
  11 /*
  12  *   This library is free software; you can redistribute it and/or modify
  13  *   it under the terms of the GNU Lesser General Public License as
  14  *   published by the Free Software Foundation; either version 2.1 of
  15  *   the License, or (at your option) any later version.
  16  *
  17  *   This program is distributed in the hope that it will be useful,
  18  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *   GNU Lesser General Public License for more details.
  21  *
  22  *   You should have received a copy of the GNU Lesser General Public
  23  *   License along with this library; if not, write to the Free Software
  24  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  25  *
  26  */
  27
  28 #ifndef __ALSA_OUTPUT_H
  29 #define __ALSA_OUTPUT_H
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 /**
  36  *  \defgroup Output Output Interface
  37  *
  38  *  The output functions present an interface similar to the stdio functions
  39  *  on top of different underlying output destinations.
  40  *
  41  *  Many PCM debugging functions (\c snd_pcm_xxx_dump_xxx) use such an output
  42  *  handle to be able to write not only to the screen but also to other
  43  *  destinations, e.g. to files or to memory buffers.
  44  *
  45  *  \{
  46  */
  47
  48 /**
  49  * \brief Internal structure for an output object.
  50  *
  51  * The ALSA library uses a pointer to this structure as a handle to an
  52  * output object. Applications don't access its contents directly.
  53  */
  54 typedef struct _snd_output snd_output_t;
  55
  56 /** Output type. */
  57 typedef enum _snd_output_type {
  58         /** Output to a stdio stream. */
  59         SND_OUTPUT_STDIO,
  60         /** Output to a memory buffer. */
  61         SND_OUTPUT_BUFFER
  62 } snd_output_type_t;
  63
  64 int snd_output_stdio_open(snd_output_t **outputp, const char *file, const char *mode);
  65 int snd_output_stdio_attach(snd_output_t **outputp, FILE *fp, int _close);
  66 int snd_output_buffer_open(snd_output_t **outputp);
  67 size_t snd_output_buffer_string(snd_output_t *output, char **buf);
  68 int snd_output_close(snd_output_t *output);
  69 int snd_output_printf(snd_output_t *output, const char *format, ...)
  70 #ifndef DOC_HIDDEN
  71         __attribute__ ((format (printf, 2, 3)))
  72 #endif
  73         ;
  74 int snd_output_vprintf(snd_output_t *output, const char *format, va_list args);
  75 int snd_output_puts(snd_output_t *output, const char *str);
  76 int snd_output_putc(snd_output_t *output, int c);
  77 int snd_output_flush(snd_output_t *output);
  78
  79 /** \} */
  80
  81 #ifdef __cplusplus
  82 }
  83 #endif
  84
  85 #endif /* __ALSA_OUTPUT_H */
  86