mirror of
https://github.com/mpv-player/mpv
synced 2024-12-11 17:37:23 +00:00
e7db4ccf1a
patch replaces '()' for the correct '(void)' in function declarations/prototypes which have no parameters. The '()' syntax tell thats there is a variable list of arguments, so that the compiler cannot check this. The extra CFLAG '-Wstrict-declarations' shows those cases. Comments about a similar patch applied to ffmpeg: That in C++ these mean the same, but in ANSI C the semantics are different; function() is an (obsolete) K&R C style forward declaration, it basically means that the function can have any number and any types of parameters, effectively completely preventing the compiler from doing any sort of type checking. -- Erik Slagter Defining functions with unspecified arguments is allowed but bad. With arguments unspecified the compiler can't report an error/warning if the function is called with incorrect arguments. -- Måns Rullgård git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@17567 b3059339-0415-0410-9bf9-f77b7e298cf2
74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
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#ifndef __AUDIO_OUT_H
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#define __AUDIO_OUT_H
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typedef struct ao_info_s
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{
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/* driver name ("Matrox Millennium G200/G400" */
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const char *name;
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/* short name (for config strings) ("mga") */
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const char *short_name;
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/* author ("Aaron Holtzman <aholtzma@ess.engr.uvic.ca>") */
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const char *author;
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/* any additional comments */
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const char *comment;
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} ao_info_t;
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/* interface towards mplayer and */
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typedef struct ao_functions_s
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{
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ao_info_t *info;
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int (*control)(int cmd,void *arg);
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int (*init)(int rate,int channels,int format,int flags);
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void (*uninit)(int immed);
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void (*reset)(void);
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int (*get_space)(void);
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int (*play)(void* data,int len,int flags);
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float (*get_delay)(void);
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void (*pause)(void);
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void (*resume)(void);
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} ao_functions_t;
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/* global data used by mplayer and plugins */
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typedef struct ao_data_s
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{
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int samplerate;
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int channels;
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int format;
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int bps;
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int outburst;
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int buffersize;
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int pts;
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} ao_data_t;
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extern char *ao_subdevice;
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extern ao_data_t ao_data;
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void list_audio_out(void);
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ao_functions_t* init_best_audio_out(char** ao_list,int use_plugin,int rate,int channels,int format,int flags);
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// NULL terminated array of all drivers
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extern ao_functions_t* audio_out_drivers[];
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#define CONTROL_OK 1
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#define CONTROL_TRUE 1
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#define CONTROL_FALSE 0
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#define CONTROL_UNKNOWN -1
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#define CONTROL_ERROR -2
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#define CONTROL_NA -3
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#define AOCONTROL_SET_DEVICE 1
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#define AOCONTROL_GET_DEVICE 2
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#define AOCONTROL_QUERY_FORMAT 3 /* test for availabilty of a format */
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#define AOCONTROL_GET_VOLUME 4
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#define AOCONTROL_SET_VOLUME 5
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#define AOCONTROL_SET_PLUGIN_DRIVER 6
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#define AOCONTROL_SET_PLUGIN_LIST 7
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typedef struct ao_control_vol_s {
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float left;
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float right;
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} ao_control_vol_t;
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#endif
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