aboutsummaryrefslogtreecommitdiffstats
path: root/src/audio.c
blob: d5619e9636a55907e513ac6d76ecf28ff2f99ec6 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
/* the Music Player Daemon (MPD)
 * (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu)
 * This project's homepage is: http://www.musicpd.org
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "audio.h"
#include "audioOutput.h"
#include "conf.h"
#include "log.h"
#include "sig_handlers.h"

#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <signal.h>

static AudioFormat audio_format;

static AudioFormat * audio_configFormat = NULL;

static AudioOutput * aoOutput = NULL;
static AudioOutput * shoutOutput = NULL;

static void copyAudioFormat(AudioFormat * dest, AudioFormat * src) {
	if(!src) return;

        dest->sampleRate = src->sampleRate;
        dest->bits = src->bits;
        dest->channels = src->channels;
}

extern AudioOutputPlugin aoPlugin;
extern AudioOutputPlugin shoutPlugin;

void initAudioDriver() {
	initAudioOutputPlugins();
	loadAudioOutputPlugin(&aoPlugin);
	loadAudioOutputPlugin(&shoutPlugin);

	aoOutput = newAudioOutput("ao");
	assert(aoOutput);
	shoutOutput = newAudioOutput("shout");
}

void getOutputAudioFormat(AudioFormat * inAudioFormat, 
                AudioFormat * outAudioFormat)
{
        if(audio_configFormat) {
                copyAudioFormat(outAudioFormat,audio_configFormat);
        }
        else copyAudioFormat(outAudioFormat,inAudioFormat);
}

void initAudioConfig() {
        char * conf = getConf()[CONF_AUDIO_OUTPUT_FORMAT];
        char * test;

        if(NULL == conf) return;

        audio_configFormat = malloc(sizeof(AudioFormat));

        memset(audio_configFormat,0,sizeof(AudioFormat));

        audio_configFormat->sampleRate = strtol(conf,&test,10);
       
        if(*test!=':') {
                ERROR("error parsing audio output format: %s\n",conf);
                exit(EXIT_FAILURE);
        }
 
        /*switch(audio_configFormat->sampleRate) {
        case 48000:
        case 44100:
        case 32000:
        case 16000:
                break;
        default:
                ERROR("sample rate %i can not be used for audio output\n",
                        (int)audio_configFormat->sampleRate);
                exit(EXIT_FAILURE);
        }*/

        if(audio_configFormat->sampleRate <= 0) {
                ERROR("sample rate %i is not >= 0\n",
                                (int)audio_configFormat->sampleRate);
                exit(EXIT_FAILURE);
        }

        audio_configFormat->bits = strtol(test+1,&test,10);
        
        if(*test!=':') {
                ERROR("error parsing audio output format: %s\n",conf);
                exit(EXIT_FAILURE);
        }

        switch(audio_configFormat->bits) {
        case 16:
                break;
        default:
                ERROR("bits %i can not be used for audio output\n",
                        (int)audio_configFormat->bits);
                exit(EXIT_FAILURE);
        }

        audio_configFormat->channels = strtol(test+1,&test,10);
        
        if(*test!='\0') {
                ERROR("error parsing audio output format: %s\n",conf);
                exit(EXIT_FAILURE);
        }

        switch(audio_configFormat->channels) {
        case 2:
                break;
        default:
                ERROR("channels %i can not be used for audio output\n",
                        (int)audio_configFormat->channels);
                exit(EXIT_FAILURE);
        }
}

void finishAudioConfig() {
        if(audio_configFormat) free(audio_configFormat);
}

void finishAudioDriver() {
	finishAudioOutput(aoOutput);
	if(shoutOutput) finishAudioOutput(shoutOutput);
	aoOutput = NULL;
}

int isCurrentAudioFormat(AudioFormat * audioFormat) {
	if(!audioFormat) return 0;

	if(memcmp(audioFormat,&audio_format,sizeof(AudioFormat)) != 0) return 0;

	return 1;
}

int openAudioDevice(AudioFormat * audioFormat) {
	if(!aoOutput->open || !isCurrentAudioFormat(audioFormat)) {
		if(audioFormat) copyAudioFormat(&audio_format, audioFormat);
		if(shoutOutput) openAudioOutput(shoutOutput, &audio_format);
		return openAudioOutput(aoOutput, &audio_format);
	}

	return 0;
}

int playAudio(char * playChunk, int size) {
	if(shoutOutput) playAudioOutput(shoutOutput, playChunk, size);
	return playAudioOutput(aoOutput, playChunk, size);
}

int isAudioDeviceOpen() {
	return aoOutput->open;
}

void closeAudioDevice() {
	if(shoutOutput) closeAudioOutput(shoutOutput);
	closeAudioOutput(aoOutput);
}