2 Simple DirectMedia Layer
3 Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
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.
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:
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.
21 #include "../../SDL_internal.h"
23 #if SDL_AUDIO_DRIVER_PSP
30 #include "SDL_audio.h"
31 #include "SDL_error.h"
32 #include "SDL_timer.h"
33 #include "../SDL_audiomem.h"
34 #include "../SDL_audio_c.h"
35 #include "../SDL_audiodev_c.h"
36 #include "../SDL_sysaudio.h"
37 #include "SDL_pspaudio.h"
40 #include <pspthreadman.h>
42 /* The tag name used by PSP audio */
43 #define PSPAUD_DRIVER_NAME "psp"
46 PSPAUD_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
48 int format, mixlen, i;
49 this->hidden = (struct SDL_PrivateAudioData *)
50 SDL_malloc(sizeof(*this->hidden));
51 if (this->hidden == NULL) {
52 return SDL_OutOfMemory();
54 SDL_memset(this->hidden, 0, sizeof(*this->hidden));
55 switch (this->spec.format & 0xff) {
58 this->spec.format = AUDIO_S16LSB;
61 return SDL_SetError("Unsupported audio format");
64 /* The sample count must be a multiple of 64. */
65 this->spec.samples = PSP_AUDIO_SAMPLE_ALIGN(this->spec.samples);
66 this->spec.freq = 44100;
68 /* Update the fragment size as size in bytes. */
69 /* SDL_CalculateAudioSpec(this->spec); MOD */
70 switch (this->spec.format) {
72 this->spec.silence = 0x80;
75 this->spec.silence = 0x00;
78 this->spec.size = SDL_AUDIO_BITSIZE(this->spec.format) / 8;
79 this->spec.size *= this->spec.channels;
80 this->spec.size *= this->spec.samples;
82 /* ========================================== */
84 /* Allocate the mixing buffer. Its size and starting address must
85 be a multiple of 64 bytes. Our sample count is already a multiple of
86 64, so spec->size should be a multiple of 64 as well. */
87 mixlen = this->spec.size * NUM_BUFFERS;
88 this->hidden->rawbuf = (Uint8 *) memalign(64, mixlen);
89 if (this->hidden->rawbuf == NULL) {
90 return SDL_SetError("Couldn't allocate mixing buffer");
93 /* Setup the hardware channel. */
94 if (this->spec.channels == 1) {
95 format = PSP_AUDIO_FORMAT_MONO;
97 format = PSP_AUDIO_FORMAT_STEREO;
99 this->hidden->channel = sceAudioChReserve(PSP_AUDIO_NEXT_CHANNEL, this->spec.samples, format);
100 if (this->hidden->channel < 0) {
101 free(this->hidden->rawbuf);
102 this->hidden->rawbuf = NULL;
103 return SDL_SetError("Couldn't reserve hardware channel");
106 memset(this->hidden->rawbuf, 0, mixlen);
107 for (i = 0; i < NUM_BUFFERS; i++) {
108 this->hidden->mixbufs[i] = &this->hidden->rawbuf[i * this->spec.size];
111 this->hidden->next_buffer = 0;
115 static void PSPAUD_PlayDevice(_THIS)
117 Uint8 *mixbuf = this->hidden->mixbufs[this->hidden->next_buffer];
119 if (this->spec.channels == 1) {
120 sceAudioOutputBlocking(this->hidden->channel, PSP_AUDIO_VOLUME_MAX, mixbuf);
122 sceAudioOutputPannedBlocking(this->hidden->channel, PSP_AUDIO_VOLUME_MAX, PSP_AUDIO_VOLUME_MAX, mixbuf);
125 this->hidden->next_buffer = (this->hidden->next_buffer + 1) % NUM_BUFFERS;
128 /* This function waits until it is possible to write a full sound buffer */
129 static void PSPAUD_WaitDevice(_THIS)
131 /* Because we block when sending audio, there's no need for this function to do anything. */
133 static Uint8 *PSPAUD_GetDeviceBuf(_THIS)
135 return this->hidden->mixbufs[this->hidden->next_buffer];
138 static void PSPAUD_CloseDevice(_THIS)
140 if (this->hidden->channel >= 0) {
141 sceAudioChRelease(this->hidden->channel);
142 this->hidden->channel = -1;
145 if (this->hidden->rawbuf != NULL) {
146 free(this->hidden->rawbuf);
147 this->hidden->rawbuf = NULL;
150 static void PSPAUD_ThreadInit(_THIS)
152 /* Increase the priority of this audio thread by 1 to put it
153 ahead of other SDL threads. */
155 SceKernelThreadInfo status;
156 thid = sceKernelGetThreadId();
157 status.size = sizeof(SceKernelThreadInfo);
158 if (sceKernelReferThreadStatus(thid, &status) == 0) {
159 sceKernelChangeThreadPriority(thid, status.currentPriority - 1);
165 PSPAUD_Init(SDL_AudioDriverImpl * impl)
168 /* Set the function pointers */
169 impl->OpenDevice = PSPAUD_OpenDevice;
170 impl->PlayDevice = PSPAUD_PlayDevice;
171 impl->WaitDevice = PSPAUD_WaitDevice;
172 impl->GetDeviceBuf = PSPAUD_GetDeviceBuf;
173 impl->WaitDone = PSPAUD_WaitDevice;
174 impl->CloseDevice = PSPAUD_CloseDevice;
175 impl->ThreadInit = PSPAUD_ThreadInit;
177 /* PSP audio device */
178 impl->OnlyHasDefaultOutputDevice = 1;
180 impl->HasCaptureSupport = 1;
182 impl->OnlyHasDefaultInputDevice = 1;
185 impl->DetectDevices = DSOUND_DetectDevices;
186 impl->Deinitialize = DSOUND_Deinitialize;
188 return 1; /* this audio target is available. */
191 AudioBootStrap PSPAUD_bootstrap = {
192 "psp", "PSP audio driver", PSPAUD_Init, 0
197 #endif /* SDL_AUDIO_DRIVER_PSP */
199 /* vi: set ts=4 sw=4 expandtab: */