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RetroArch/audio/drivers/ctr_csnd_audio.c

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2014-2016 - Ali Bouhlel
*
* RetroArch 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 Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch 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 RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <3ds.h>
#include <string.h>
#include <malloc.h>
#include "../audio_driver.h"
#include "../../configuration.h"
#include "../../performance_counters.h"
#include "../../runloop.h"
typedef struct
{
bool nonblocking;
bool playing;
int16_t* l;
int16_t* r;
uint32_t l_paddr;
uint32_t r_paddr;
uint32_t pos;
uint32_t playpos;
uint64_t cpu_ticks_last;
} ctr_csnd_audio_t;
#define CTR_CSND_AUDIO_COUNT (1u << 11u)
#define CTR_CSND_AUDIO_COUNT_MASK (CTR_CSND_AUDIO_COUNT - 1u)
#define CTR_CSND_AUDIO_SIZE (CTR_CSND_AUDIO_COUNT * sizeof(int16_t))
#define CTR_CSND_AUDIO_SIZE_MASK (CTR_CSND_AUDIO_SIZE - 1u)
#define CTR_CSND_AUDIO_RATE 32730
#define CTR_CSND_TICKS_PER_SAMPLE 2048
#define CTR_CSND_CPU_TICKS_PER_SAMPLE (CTR_CSND_TICKS_PER_SAMPLE * 4)
static void ctr_csnd_audio_update_playpos(ctr_csnd_audio_t* ctr)
{
uint64_t current_tick = svcGetSystemTick();
uint32_t samples_played = (current_tick - ctr->cpu_ticks_last)
/ CTR_CSND_CPU_TICKS_PER_SAMPLE;
ctr->playpos = (ctr->playpos + samples_played) & CTR_CSND_AUDIO_COUNT_MASK;
ctr->cpu_ticks_last += samples_played * CTR_CSND_CPU_TICKS_PER_SAMPLE;
}
Result csndPlaySound_custom(int chn, u32 flags, float vol, float pan,
void* data0, void* data1, u32 size)
{
u32 paddr0 = 0;
u32 paddr1 = 0;
int encoding = (flags >> 12) & 3;
int loopMode = (flags >> 10) & 3;
if (!(csndChannels & BIT(chn)))
return 1;
if (!loopMode)
flags |= SOUND_ONE_SHOT;
if (encoding != CSND_ENCODING_PSG)
{
if (data0)
paddr0 = osConvertVirtToPhys(data0);
if (data1)
paddr1 = osConvertVirtToPhys(data1);
if (data0 && encoding == CSND_ENCODING_ADPCM)
{
int adpcmSample = ((s16*)data0)[-2];
int adpcmIndex = ((u8*)data0)[-2];
CSND_SetAdpcmState(chn, 0, adpcmSample, adpcmIndex);
}
}
flags &= ~0xFFFF001F;
flags |= SOUND_ENABLE | SOUND_CHANNEL(chn) | (CTR_CSND_TICKS_PER_SAMPLE << 16);
u32 volumes = CSND_VOL(vol, pan);
CSND_SetChnRegs(flags, paddr0, paddr1, size, volumes, volumes);
if (loopMode == CSND_LOOPMODE_NORMAL && paddr1 > paddr0)
{
// Now that the first block is playing, configure the size of the subsequent blocks
size -= paddr1 - paddr0;
CSND_SetBlock(chn, 1, paddr1, size);
}
return 0;
}
static void *ctr_csnd_audio_init(const char *device, unsigned rate, unsigned latency)
{
ctr_csnd_audio_t *ctr = (ctr_csnd_audio_t*)calloc(1, sizeof(ctr_csnd_audio_t));
settings_t *settings = config_get_ptr();
if (!ctr)
return NULL;
(void)device;
(void)rate;
(void)latency;
settings->audio.out_rate = CTR_CSND_AUDIO_RATE;
ctr->l = linearAlloc(CTR_CSND_AUDIO_SIZE);
ctr->r = linearAlloc(CTR_CSND_AUDIO_SIZE);
memset(ctr->l, 0, CTR_CSND_AUDIO_SIZE);
memset(ctr->r, 0, CTR_CSND_AUDIO_SIZE);
ctr->l_paddr = osConvertVirtToPhys(ctr->l);
ctr->r_paddr = osConvertVirtToPhys(ctr->r);
ctr->pos = 0;
GSPGPU_FlushDataCache((void*)ctr->l_paddr, CTR_CSND_AUDIO_SIZE);
GSPGPU_FlushDataCache((void*)ctr->r_paddr, CTR_CSND_AUDIO_SIZE);
csndPlaySound_custom(0x8, SOUND_LOOPMODE(CSND_LOOPMODE_NORMAL)| SOUND_FORMAT(CSND_ENCODING_PCM16),
1.0, -1.0, ctr->l, ctr->l, CTR_CSND_AUDIO_SIZE);
csndPlaySound_custom(0x9, SOUND_LOOPMODE(CSND_LOOPMODE_NORMAL)| SOUND_FORMAT(CSND_ENCODING_PCM16),
1.0, 1.0, ctr->r, ctr->r, CTR_CSND_AUDIO_SIZE);
csndExecCmds(true);
ctr->playpos = 0;
ctr->cpu_ticks_last = svcGetSystemTick();
ctr->playing = true;
return ctr;
}
static void ctr_csnd_audio_free(void *data)
{
ctr_csnd_audio_t* ctr = (ctr_csnd_audio_t*)data;
// csndExit();
CSND_SetPlayState(0x8, 0);
CSND_SetPlayState(0x9, 0);
csndExecCmds(false);
linearFree(ctr->l);
linearFree(ctr->r);
free(ctr);
}
static ssize_t ctr_csnd_audio_write(void *data, const void *buf, size_t size)
{
int i;
uint32_t samples_played = 0;
uint64_t current_tick = 0;
static struct retro_perf_counter ctraudio_f = {0};
const uint16_t *src = buf;
ctr_csnd_audio_t *ctr = (ctr_csnd_audio_t*)data;
(void)data;
(void)buf;
(void)samples_played;
(void)current_tick;
performance_counter_init(&ctraudio_f, "ctraudio_f");
performance_counter_start(&ctraudio_f);
ctr_csnd_audio_update_playpos(ctr);
if((((ctr->playpos - ctr->pos) & CTR_CSND_AUDIO_COUNT_MASK) < (CTR_CSND_AUDIO_COUNT >> 2)) ||
(((ctr->pos - ctr->playpos ) & CTR_CSND_AUDIO_COUNT_MASK) < (CTR_CSND_AUDIO_COUNT >> 4)) ||
(((ctr->playpos - ctr->pos) & CTR_CSND_AUDIO_COUNT_MASK) < (size >> 2)))
{
if (ctr->nonblocking)
ctr->pos = (ctr->playpos + (CTR_CSND_AUDIO_COUNT >> 1)) & CTR_CSND_AUDIO_COUNT_MASK;
else
{
do{
/* todo: compute the correct sleep period */
retro_sleep(1);
ctr_csnd_audio_update_playpos(ctr);
}while (((ctr->playpos - ctr->pos) & CTR_CSND_AUDIO_COUNT_MASK) < (CTR_CSND_AUDIO_COUNT >> 1)
|| (((ctr->pos - ctr->playpos) & CTR_CSND_AUDIO_COUNT_MASK) < (CTR_CSND_AUDIO_COUNT >> 4)));
}
}
for (i = 0; i < (size >> 1); i += 2)
{
ctr->l[ctr->pos] = src[i];
ctr->r[ctr->pos] = src[i + 1];
ctr->pos++;
ctr->pos &= CTR_CSND_AUDIO_COUNT_MASK;
}
GSPGPU_FlushDataCache(ctr->l, CTR_CSND_AUDIO_SIZE);
GSPGPU_FlushDataCache(ctr->r, CTR_CSND_AUDIO_SIZE);
performance_counter_stop(&ctraudio_f);
return size;
}
static bool ctr_csnd_audio_stop(void *data)
{
ctr_csnd_audio_t* ctr = (ctr_csnd_audio_t*)data;
/* using SetPlayState would make tracking the playback
* position more difficult */
#if 0
CSND_SetPlayState(0x8, 0);
CSND_SetPlayState(0x9, 0);
#endif
/* setting the channel volume to 0 seems to make it
* impossible to set it back to full volume later */
CSND_SetVol(0x8, 0x00000001, 0);
CSND_SetVol(0x9, 0x00010000, 0);
csndExecCmds(false);
ctr->playing = false;
return true;
}
static bool ctr_csnd_audio_alive(void *data)
{
ctr_csnd_audio_t* ctr = (ctr_csnd_audio_t*)data;
return ctr->playing;
}
static bool ctr_csnd_audio_start(void *data)
{
ctr_csnd_audio_t* ctr = (ctr_csnd_audio_t*)data;
/* Prevents restarting audio when the menu
* is toggled off on shutdown */
if (runloop_ctl(RUNLOOP_CTL_IS_SHUTDOWN, NULL))
return true;
#if 0
CSND_SetPlayState(0x8, 1);
CSND_SetPlayState(0x9, 1);
#endif
CSND_SetVol(0x8, 0x00008000, 0);
CSND_SetVol(0x9, 0x80000000, 0);
csndExecCmds(false);
ctr->playing = true;
return true;
}
static void ctr_csnd_audio_set_nonblock_state(void *data, bool state)
{
ctr_csnd_audio_t* ctr = (ctr_csnd_audio_t*)data;
if (ctr)
ctr->nonblocking = state;
}
static bool ctr_csnd_audio_use_float(void *data)
{
(void)data;
return false;
}
static size_t ctr_csnd_audio_write_avail(void *data)
{
ctr_csnd_audio_t* ctr = (ctr_csnd_audio_t*)data;
ctr_csnd_audio_update_playpos(ctr);
return (ctr->playpos - ctr->pos) & CTR_CSND_AUDIO_COUNT_MASK;
}
static size_t ctr_csnd_audio_buffer_size(void *data)
{
(void)data;
return CTR_CSND_AUDIO_COUNT;
}
audio_driver_t audio_ctr_csnd = {
ctr_csnd_audio_init,
ctr_csnd_audio_write,
ctr_csnd_audio_stop,
ctr_csnd_audio_start,
ctr_csnd_audio_alive,
ctr_csnd_audio_set_nonblock_state,
ctr_csnd_audio_free,
ctr_csnd_audio_use_float,
"csnd",
NULL,
NULL,
ctr_csnd_audio_write_avail,
ctr_csnd_audio_buffer_size
};
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