libao2/audio_out.h

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #ifndef MPLAYER_AUDIO_OUT_H
  20 #define MPLAYER_AUDIO_OUT_H
  21
  22 #include <stdbool.h>
  23
  24 typedef struct ao_info_s
  25 {
  26         /* driver name ("Matrox Millennium G200/G400" */
  27         const char *name;
  28         /* short name (for config strings) ("mga") */
  29         const char *short_name;
  30         /* author ("Aaron Holtzman <aholtzma@ess.engr.uvic.ca>") */
  31         const char *author;
  32         /* any additional comments */
  33         const char *comment;
  34 } ao_info_t;
  35
  36 /* interface towards mplayer and */
  37 typedef struct ao_functions
  38 {
  39         const ao_info_t *info;
  40         int (*control)(int cmd,void *arg);
  41         int (*init)(int rate,int channels,int format,int flags);
  42         void (*uninit)(int immed);
  43         void (*reset)(void);
  44         int (*get_space)(void);
  45         int (*play)(void* data,int len,int flags);
  46         float (*get_delay)(void);
  47         void (*pause)(void);
  48         void (*resume)(void);
  49 } ao_functions_t;
  50
  51 /* global data used by mplayer and plugins */
  52 struct ao {
  53   int samplerate;
  54   int channels;
  55   int format;
  56   int bps;
  57   int outburst;
  58   int buffersize;
  59   int pts;
  60     bool initialized;
  61     const struct ao_functions *driver;
  62 };
  63
  64 extern char *ao_subdevice;
  65
  66 void list_audio_out(void);
  67
  68 // NULL terminated array of all drivers
  69 extern const ao_functions_t* const audio_out_drivers[];
  70
  71 #define CONTROL_OK 1
  72 #define CONTROL_TRUE 1
  73 #define CONTROL_FALSE 0
  74 #define CONTROL_UNKNOWN -1
  75 #define CONTROL_ERROR -2
  76 #define CONTROL_NA -3
  77
  78 #define AOCONTROL_SET_DEVICE 1
  79 #define AOCONTROL_GET_DEVICE 2
  80 #define AOCONTROL_QUERY_FORMAT 3 /* test for availabilty of a format */
  81 #define AOCONTROL_GET_VOLUME 4
  82 #define AOCONTROL_SET_VOLUME 5
  83 #define AOCONTROL_SET_PLUGIN_DRIVER 6
  84 #define AOCONTROL_SET_PLUGIN_LIST 7
  85
  86 #define AOPLAY_FINAL_CHUNK 1
  87
  88 typedef struct ao_control_vol_s {
  89         float left;
  90         float right;
  91 } ao_control_vol_t;
  92
  93 struct ao *ao_create(void);
  94 void ao_init(struct ao *ao, char **ao_list);
  95 void ao_uninit(struct ao *ao, bool drain_audio);
  96 int ao_play(struct ao *ao, void *data, int len, int flags);
  97 int ao_control(struct ao *ao, int cmd, void *arg);
  98 double ao_get_delay(struct ao *ao);
  99 int ao_get_space(struct ao *ao);
 100 void ao_reset(struct ao *ao);
 101 void ao_pause(struct ao *ao);
 102 void ao_resume(struct ao *ao);
 103
 104 #endif /* MPLAYER_AUDIO_OUT_H */