I may be wrong but I'm currently playing with ex_record and ex_record_name to make myself a little recorder.
When just copy pasting the pasta and expanding the examples max_seconds, I ended with file that are the double of the file I currently save.
I digged up in the A5 sources and found that it isn't using the ALLEGRO_AUDIO_DEPTH (INT16 or whatever) in the sample size allocation.
My application or the example or the al_create_sample is wrong, but I had to divide samples by two to have the right amount of bytes saved.
Does anyone have a light for me ?
Code:
#SelectExpand
1/* Recorder is created like that: */
2
3 internals
-> recorder
= al_create_audio_recorder
(
4 internals
-> fragment
/ internals
-> latency ,
/* 10 seconds buffer space */
5 internals
-> frequency
* internals
-> latency ,
/* configure the fragment size to give us the given
6 latency in seconds */
7 internals
-> frequency,
/* samples per second (higher => better quality) */
8 ALLEGRO_AUDIO_DEPTH_INT16,
/* 2-byte sample size */
9 ALLEGRO_CHANNEL_CONF_2
/* stereo */
10 );
11
12/* running values:
13refresh_rate: 60.000000
14frequency: 44100
15max_seconds: 300
16fragment: 10
17latency: 0.100000
18*/
19
20/* I save the sample like in the examples */
21
22nstrprintf
( date_str ,
"./output/%d/%s/%s" , local_time
-> tm_year
+ 1900 , time_split
[ 4 ] , time_split
[ 3 ] );
23nstrprintf
( command ,
"mkdir -p %s" , date_str
-> data
);
24system( _nstr
( command
) );
25nstrcat_bytes
( date_str ,
"/" );
26nstrcat_bytes
( date_str , qvstudio
-> titles
[ selected_title
] );
27nstrcat_bytes
( date_str ,
"_" );
28nstrcat_bytes
( date_str , time_split
[ 2 ] );
29nstrcat_bytes
( date_str ,
"H" );
30nstrcat_bytes
( date_str , time_split
[ 1 ] );
31nstrcat_bytes
( date_str ,
"M" );
32nstrcat_bytes
( date_str , time_split
[ 0 ] );
33nstrcat_bytes
( date_str ,
"S" );
34nstrcat_bytes
( date_str ,
".wav" );
35/* finished recording, but haven't created the sample yet */
36ALLEGRO_SAMPLE *spl
= al_create_sample( qvstudio
-> record_buffer ,
37 ( qvstudio
-> record_buffer_pos
- qvstudio
-> record_buffer
) / 2 ,
/* HERE NOTICE THE /2. WITHOUT IT I GOT 2x LENGTH ! */
38 qvstudio
-> frequency ,
39 ALLEGRO_AUDIO_DEPTH_INT16 , ALLEGRO_CHANNEL_CONF_2 ,
false );
40al_save_sample( _nstr
( date_str
) , spl
);
41al_destroy_sample( spl
);
42qvstudio
-> record_buffer_pos
= qvstudio
-> record_buffer
;
43
44
45/* qvstudio variable struct for type reference */
46
47#define MIN_SAMPLE_VAL 0x8000
48#define MAX_SAMPLE_VAL 0x7fff
49
50/*! Quiniou Studio Config structure */
51typedef struct QS_INTERNALS
52{
53 /* DISPLAY */
54 /*! path to ttf font file */
55 const char *font_file_small ,
56 /*! path to ttf font file */
57 *font_file_regular ,
58 /*! path to ttf font file */
59 *font_file_huge ,
60 /*! path to background picture */
61 *background_file
;
62
63 /*! size for little text output */
64 int font_size_small ,
65 /*! size for normal text output */
66 font_size_regular ,
67 /*! size for huge text output */
68 font_size_huge ,
69 /*! Screen W size */
70 w ,
71 /*! Screen H size */
72 h
;
73 /*! Internal loop freq */
74 float refresh_rate
;
75
76 /*! The 3 loaded fonts with their respective sizes */
77 ALLEGRO_FONT *font[ 3 ];
78 /*! Acutal display */
79 ALLEGRO_DISPLAY *display
;
80 /*! Event queue */
81 ALLEGRO_EVENT_QUEUE *queue
;
82 /*! Timer */
83 ALLEGRO_TIMER *timer
;
84
85 /*! RECORDER */
86 ALLEGRO_AUDIO_RECORDER
*recorder
;
87 /*! fragment from recorder */
88 ALLEGRO_AUDIO_RECORDER_EVENT
*record_event
;
89 /*! recording buffer , stores up to max_seconds of audio */
90 int16_t *record_buffer,
91 /*! points to the current recorded position */
92 *record_buffer_pos,
93 /*! points to the end of the buffer */
94 *record_buffer_end
;
95 /*! recording flag */
96 int is_recording
;
97 /*! Recording frequancy (44100,48000,96000) */
98 int frequency
;
99 /*! Maximum size of sample */
100 int max_seconds
;
101 /*! recorder internal buffer */
102 int fragment
;
103 /*! Latency */
104 float latency ,
105 /*! Computed volume for current input */
106 gain
;
107
108 /*! Loaded title list */
109 char *titles
[ NB_MAX_TITLES
+ 1 ];
110 /*! number of loaded titles */
111 int nb_titles
;
112
113}
]]>