aboutsummaryrefslogtreecommitdiff
path: root/backends/epoc/SymbianOS.cpp
blob: 55f52260a03aea09f9a5a454c3dcde11939ba22e (plain)
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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
/* ScummVM - Scumm Interpreter
 * Copyright (C) 2003-2005 Andreas 'Sprawl' Karlsson - Original EPOC port, ESDL
 * Copyright (C) 2003-2005 Lars 'AnotherGuest' Persson - Original EPOC port, Audio System
 * Copyright (C) 2005 Jurgen 'SumthinWicked' Braam - EPOC/CVS maintainer
 * Copyright (C) 2005 The ScummVM project
 *
 * 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.
 *
 * $Header$
 */

#include "SymbianOS.h"

static const OSystem::GraphicsMode s_supportedGraphicsModes[] = {
	{"1x", "Fullscreen", GFX_NORMAL},
	{0, 0, 0}
};

OSystem *OSystem_SymbianOS_create() {
	return new OSystem_SDL_Symbian();
}


#include "config-manager.h"

extern Common::ConfigManager *g_config;

OSystem_SDL_Symbian::OSystem_SDL_Symbian() :_channels(0),_stereo_mix_buffer(0){
	ConfMan.set("FM_high_quality", false);
	ConfMan.set("FM_medium_quality", true);
//	ConfMan.set("joystick_num",0); // S60 should have joystick_num set to 0 in the ini file
	ConfMan.flushToDisk();
}

OSystem_SDL_Symbian::~OSystem_SDL_Symbian() {
	delete []_stereo_mix_buffer;
}

int OSystem_SDL_Symbian::getDefaultGraphicsMode() const {
	return GFX_NORMAL;
}

const OSystem::GraphicsMode *OSystem_SDL_Symbian::getSupportedGraphicsModes() const {
	return s_supportedGraphicsModes;
}

// make sure we always go to normal, even if the string might be set wrong!
bool OSystem_SDL_Symbian::setGraphicsMode(const char *name) {
	// let parent OSystem_SDL handle it
	return OSystem_SDL::setGraphicsMode(getDefaultGraphicsMode());
}

/*
 * SumthinWicked says: the stuff below is copied from common/scaler.cpp, 
 * so we can skip compiling the scalers. ESDL still needs 1x and the scaler
 * architecture because we inherit from OSystem_SDL.
 */
int gBitFormat = 565;
void InitScalers(uint32 BitFormat) {} // called by OSystem_SDL functions, not relevant for ESDL
	
/** 
 * Trivial 'scaler' - in fact it doesn't do any scaling but just copies the
 * source to the destination.
 */
void Normal1x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
							int width, int height) {
	while (height--) {
		memcpy(dstPtr, srcPtr, 2 * width);
		srcPtr += srcPitch;
		dstPtr += dstPitch;
	}
}

bool OSystem_SDL_Symbian::setSoundCallback(SoundProc proc, void *param) {

	// First save the proc and param
	_sound_proc_param = param; 
	_sound_proc = proc;
	SDL_AudioSpec desired;
	SDL_AudioSpec obtained;

	memset(&desired, 0, sizeof(desired));

	_samplesPerSec = 0;

	if (ConfMan.hasKey("output_rate"))
		_samplesPerSec = ConfMan.getInt("output_rate");

	if (_samplesPerSec <= 0)
		_samplesPerSec = SAMPLES_PER_SEC;

	// Originally, we always used 2048 samples. This loop will produce the
	// same result at 22050 Hz, and should hopefully produce something
	// sensible for other frequencies. Note that it must be a power of two.

	uint32 samples = 0x8000;

	for (;;) {
		if ((1000 * samples) / _samplesPerSec < 100)
			break;
		samples >>= 1;
	}

	desired.freq = _samplesPerSec;
	desired.format = AUDIO_S16SYS;
	desired.channels = 2;
	desired.samples = (uint16)samples;
#ifdef S60
	desired.callback = symbianMixCallback;
	desired.userdata = this;
#else
	desired.callback = proc;
	desired.userdata = param;
#endif
	if (SDL_OpenAudio(&desired, &obtained) != 0) {
		warning("Could not open audio device: %s", SDL_GetError());
		return false;
	}
	// Note: This should be the obtained output rate, but it seems that at
	// least on some platforms SDL will lie and claim it did get the rate
	// even if it didn't. Probably only happens for "weird" rates, though.
	_samplesPerSec = obtained.freq;
	_channels = obtained.channels;

	// Need to create mixbuffer for stereo mix to downmix
	if(_channels != 2)
	{
		_stereo_mix_buffer = new byte [obtained.size*2];//*2 for stereo values
	}

	SDL_PauseAudio(0);
	return true;
}

/**
 * The mixer callback function, passed on to OSystem::setSoundCallback().
 * This simply calls the mix() method.
 */
void OSystem_SDL_Symbian::symbianMixCallback(void *s, byte *samples, int len){
	static_cast <OSystem_SDL_Symbian*>(s)->symbianMix(samples,len);
}


/**
 * Actual mixing implementation
 */
void OSystem_SDL_Symbian::symbianMix(byte *samples, int len){


	// If not stereo then we need to downmix
	if(_channels != 2){
	  	_sound_proc(_sound_proc_param,_stereo_mix_buffer,len*2);
		int16* bitmixDst=(int16*)samples;
		int16* bitmixSrc=(int16*)_stereo_mix_buffer;

		for(int loop=len/2;loop>=0;loop--)
		{
			*bitmixDst=(*bitmixSrc+*(bitmixSrc+1))>>1;
			bitmixDst++;
			bitmixSrc+=2;
		}
	}
	else
		_sound_proc(_sound_proc_param,samples,len);

}

/*
// probably don't need this anymore: will remove later
#define EMPTY_SCALER_IMPLEMENTATION(x)	\
	void x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, \
					uint32 dstPitch, int width, int height) {}

//EMPTY_SCALER_IMPLEMENTATION(_2xSaI);
//EMPTY_SCALER_IMPLEMENTATION(Super2xSaI);
//EMPTY_SCALER_IMPLEMENTATION(SuperEagle);
EMPTY_SCALER_IMPLEMENTATION(AdvMame2x);
EMPTY_SCALER_IMPLEMENTATION(AdvMame3x);
//EMPTY_SCALER_IMPLEMENTATION(Normal1x);
//EMPTY_SCALER_IMPLEMENTATION(Normal2x);
//EMPTY_SCALER_IMPLEMENTATION(Normal3x);
EMPTY_SCALER_IMPLEMENTATION(Normal1o5x);
//EMPTY_SCALER_IMPLEMENTATION(TV2x);
//EMPTY_SCALER_IMPLEMENTATION(DotMatrix);
//EMPTY_SCALER_IMPLEMENTATION(HQ2x);
//EMPTY_SCALER_IMPLEMENTATION(HQ3x);
*/