1 /** 2 * \file include/output.h 3 * \brief Application interface library for the ALSA driver 4 * \author Jaroslav Kysela <perex (at) perex.cz> 5 * \author Abramo Bagnara <abramo (at) alsa-project.org> 6 * \author Takashi Iwai <tiwai (at) 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 87
