1 /*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
4
5 This software is provided 'as-is', without any express or implied
6 warranty. In no event will the authors be held liable for any damages
7 arising from the use of this software.
8
9 Permission is granted to anyone to use this software for any purpose,
10 including commercial applications, and to alter it and redistribute it
11 freely, subject to the following restrictions:
12
13 1. The origin of this software must not be misrepresented; you must not
14 claim that you wrote the original software. If you use this software
15 in a product, an acknowledgment in the product documentation would be
16 appreciated but is not required.
17 2. Altered source versions must be plainly marked as such, and must not be
18 misrepresented as being the original software.
19 3. This notice may not be removed or altered from any source distribution.
20 */
21 #include "../../SDL_internal.h"
22
23 #if SDL_AUDIO_DRIVER_PSP
24
25 #include <stdio.h>
26 #include <string.h>
27 #include <stdlib.h>
28 #include <malloc.h>
29
30 #include "SDL_audio.h"
31 #include "SDL_error.h"
32 #include "SDL_timer.h"
33 #include "../SDL_audio_c.h"
34 #include "../SDL_audiodev_c.h"
35 #include "../SDL_sysaudio.h"
36 #include "SDL_pspaudio.h"
37
38 #include <pspaudio.h>
39 #include <pspthreadman.h>
40
41 /* The tag name used by PSP audio */
42 #define PSPAUDIO_DRIVER_NAME "psp"
43
44 static int
PSPAUDIO_OpenDevice(_THIS,void * handle,const char * devname,int iscapture)45 PSPAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
46 {
47 int format, mixlen, i;
48 this->hidden = (struct SDL_PrivateAudioData *)
49 SDL_malloc(sizeof(*this->hidden));
50 if (this->hidden == NULL) {
51 return SDL_OutOfMemory();
52 }
53 SDL_zerop(this->hidden);
54 switch (this->spec.format & 0xff) {
55 case 8:
56 case 16:
57 this->spec.format = AUDIO_S16LSB;
58 break;
59 default:
60 return SDL_SetError("Unsupported audio format");
61 }
62
63 /* The sample count must be a multiple of 64. */
64 this->spec.samples = PSP_AUDIO_SAMPLE_ALIGN(this->spec.samples);
65 this->spec.freq = 44100;
66
67 /* Update the fragment size as size in bytes. */
68 SDL_CalculateAudioSpec(&this->spec);
69
70 /* Allocate the mixing buffer. Its size and starting address must
71 be a multiple of 64 bytes. Our sample count is already a multiple of
72 64, so spec->size should be a multiple of 64 as well. */
73 mixlen = this->spec.size * NUM_BUFFERS;
74 this->hidden->rawbuf = (Uint8 *) memalign(64, mixlen);
75 if (this->hidden->rawbuf == NULL) {
76 return SDL_SetError("Couldn't allocate mixing buffer");
77 }
78
79 /* Setup the hardware channel. */
80 if (this->spec.channels == 1) {
81 format = PSP_AUDIO_FORMAT_MONO;
82 } else {
83 this->spec.channels = 2;
84 format = PSP_AUDIO_FORMAT_STEREO;
85 }
86 this->hidden->channel = sceAudioChReserve(PSP_AUDIO_NEXT_CHANNEL, this->spec.samples, format);
87 if (this->hidden->channel < 0) {
88 free(this->hidden->rawbuf);
89 this->hidden->rawbuf = NULL;
90 return SDL_SetError("Couldn't reserve hardware channel");
91 }
92
93 memset(this->hidden->rawbuf, 0, mixlen);
94 for (i = 0; i < NUM_BUFFERS; i++) {
95 this->hidden->mixbufs[i] = &this->hidden->rawbuf[i * this->spec.size];
96 }
97
98 this->hidden->next_buffer = 0;
99 return 0;
100 }
101
PSPAUDIO_PlayDevice(_THIS)102 static void PSPAUDIO_PlayDevice(_THIS)
103 {
104 Uint8 *mixbuf = this->hidden->mixbufs[this->hidden->next_buffer];
105
106 if (this->spec.channels == 1) {
107 sceAudioOutputBlocking(this->hidden->channel, PSP_AUDIO_VOLUME_MAX, mixbuf);
108 } else {
109 sceAudioOutputPannedBlocking(this->hidden->channel, PSP_AUDIO_VOLUME_MAX, PSP_AUDIO_VOLUME_MAX, mixbuf);
110 }
111
112 this->hidden->next_buffer = (this->hidden->next_buffer + 1) % NUM_BUFFERS;
113 }
114
115 /* This function waits until it is possible to write a full sound buffer */
PSPAUDIO_WaitDevice(_THIS)116 static void PSPAUDIO_WaitDevice(_THIS)
117 {
118 /* Because we block when sending audio, there's no need for this function to do anything. */
119 }
PSPAUDIO_GetDeviceBuf(_THIS)120 static Uint8 *PSPAUDIO_GetDeviceBuf(_THIS)
121 {
122 return this->hidden->mixbufs[this->hidden->next_buffer];
123 }
124
PSPAUDIO_CloseDevice(_THIS)125 static void PSPAUDIO_CloseDevice(_THIS)
126 {
127 if (this->hidden->channel >= 0) {
128 sceAudioChRelease(this->hidden->channel);
129 }
130 free(this->hidden->rawbuf); /* this uses memalign(), not SDL_malloc(). */
131 SDL_free(this->hidden);
132 }
133
PSPAUDIO_ThreadInit(_THIS)134 static void PSPAUDIO_ThreadInit(_THIS)
135 {
136 /* Increase the priority of this audio thread by 1 to put it
137 ahead of other SDL threads. */
138 SceUID thid;
139 SceKernelThreadInfo status;
140 thid = sceKernelGetThreadId();
141 status.size = sizeof(SceKernelThreadInfo);
142 if (sceKernelReferThreadStatus(thid, &status) == 0) {
143 sceKernelChangeThreadPriority(thid, status.currentPriority - 1);
144 }
145 }
146
147
148 static int
PSPAUDIO_Init(SDL_AudioDriverImpl * impl)149 PSPAUDIO_Init(SDL_AudioDriverImpl * impl)
150 {
151 /* Set the function pointers */
152 impl->OpenDevice = PSPAUDIO_OpenDevice;
153 impl->PlayDevice = PSPAUDIO_PlayDevice;
154 impl->WaitDevice = PSPAUDIO_WaitDevice;
155 impl->GetDeviceBuf = PSPAUDIO_GetDeviceBuf;
156 impl->CloseDevice = PSPAUDIO_CloseDevice;
157 impl->ThreadInit = PSPAUDIO_ThreadInit;
158
159 /* PSP audio device */
160 impl->OnlyHasDefaultOutputDevice = 1;
161 /*
162 impl->HasCaptureSupport = 1;
163
164 impl->OnlyHasDefaultCaptureDevice = 1;
165 */
166 /*
167 impl->DetectDevices = DSOUND_DetectDevices;
168 impl->Deinitialize = DSOUND_Deinitialize;
169 */
170 return 1; /* this audio target is available. */
171 }
172
173 AudioBootStrap PSPAUDIO_bootstrap = {
174 "psp", "PSP audio driver", PSPAUDIO_Init, 0
175 };
176
177 /* SDL_AUDI */
178
179 #endif /* SDL_AUDIO_DRIVER_PSP */
180
181 /* vi: set ts=4 sw=4 expandtab: */
182