mirror of
https://github.com/libretro/RetroArch.git
synced 2024-06-02 19:57:24 -04:00
e7f182811a
* Split up audio code into new file audio/audio_driver.c * Fix build issues #1 * Small cleanup * Fix typo
337 lines
9 KiB
C
337 lines
9 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2014-2017 - Ali Bouhlel
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* Copyright (C) 2016-2017 - FIX94
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <string.h>
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#include <malloc.h>
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#include <stdint.h>
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#include <wiiu/os.h>
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#include <wiiu/ax.h>
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#include "../../wiiu/wiiu_dbg.h"
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#include "../../wiiu/system/memory.h"
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#include "../audio_driver.h"
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typedef struct
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{
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AXMVoice* mvoice;
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uint16_t* buffer_l;
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uint16_t* buffer_r;
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OSSpinLock spinlock;
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uint32_t pos;
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uint32_t written;
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bool nonblock;
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} ax_audio_t;
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/* 3072 samples main buffer, 64ms total */
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#define AX_AUDIO_COUNT 3072
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#define AX_AUDIO_SIZE (AX_AUDIO_COUNT << 1u)
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#define AX_AUDIO_SAMPLE_COUNT 144 /* 3ms */
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#define AX_AUDIO_SAMPLE_MIN (AX_AUDIO_SAMPLE_COUNT * 3) /* 9ms */
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#define AX_AUDIO_SAMPLE_LOAD (AX_AUDIO_SAMPLE_COUNT * 10)/* 30ms */
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#define AX_AUDIO_MAX_FREE (AX_AUDIO_COUNT - (AX_AUDIO_SAMPLE_COUNT * 2))
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#define AX_AUDIO_RATE 48000
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#if 0
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#define ax_audio_ticks_to_samples(ticks) (((ticks) * 64) / 82875)
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#define ax_audio_samples_to_ticks(samples) (((samples) * 82875) / 64)
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#endif
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static volatile ax_audio_t *wiiu_cb_ax = NULL;
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void wiiu_ax_callback(void)
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{
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ax_audio_t *ax = NULL;
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/*possibly called before unregister */
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if (!wiiu_cb_ax)
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return;
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ax = (ax_audio_t*)wiiu_cb_ax;
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if (AXIsMultiVoiceRunning(ax->mvoice))
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{
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if (OSUninterruptibleSpinLock_Acquire(&ax->spinlock))
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{
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/* Buffer underrun, stop playback to let it fill up */
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if (ax->written < AX_AUDIO_SAMPLE_MIN)
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AXSetMultiVoiceState(ax->mvoice, AX_VOICE_STATE_STOPPED);
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ax->written -= AX_AUDIO_SAMPLE_COUNT;
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OSUninterruptibleSpinLock_Release(&ax->spinlock);
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}
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}
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}
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extern void AXRegisterFrameCallback(void *cb);
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static void* ax_audio_init(const char* device, unsigned rate, unsigned latency,
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unsigned block_frames,
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unsigned *new_rate)
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{
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AXVoiceOffsets offsets[2];
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u16 setup_buf[0x30] = {0};
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setup_buf[0x25] = 2; /* we request 2 channels */
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AXInitParams init = {AX_INIT_RENDERER_48KHZ, 0, 0};
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AXVoiceVeData ve = {0x8000, 0};
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ax_audio_t* ax = (ax_audio_t*)calloc(1, sizeof(ax_audio_t));
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if (!ax)
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return NULL;
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AXInitWithParams(&init);
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AXAcquireMultiVoice(31, NULL, 0, setup_buf, &ax->mvoice);
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if (!ax->mvoice || ax->mvoice->channels != 2)
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{
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free(ax);
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return NULL;
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}
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ax->buffer_l = MEM1_alloc(AX_AUDIO_SIZE, 0x100);
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ax->buffer_r = MEM1_alloc(AX_AUDIO_SIZE, 0x100);
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memset(ax->buffer_l,0,AX_AUDIO_SIZE);
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memset(ax->buffer_r,0,AX_AUDIO_SIZE);
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DCFlushRange(ax->buffer_l,AX_AUDIO_SIZE);
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DCFlushRange(ax->buffer_r,AX_AUDIO_SIZE);
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/* shared by both voices */
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offsets[0].currentOffset = 0;
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offsets[0].loopOffset = 0;
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offsets[0].endOffset = AX_AUDIO_COUNT - 1;
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offsets[0].loopingEnabled = AX_VOICE_LOOP_ENABLED;
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offsets[0].dataType = AX_VOICE_FORMAT_LPCM16;
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memcpy(&offsets[1], &offsets[0], sizeof(AXVoiceOffsets));
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/* different buffers per voice */
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offsets[0].data = ax->buffer_l;
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offsets[1].data = ax->buffer_r;
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AXSetMultiVoiceOffsets(ax->mvoice, offsets);
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AXSetMultiVoiceSrcType(ax->mvoice, AX_VOICE_SRC_TYPE_NONE);
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AXSetMultiVoiceSrcRatio(ax->mvoice, 1.0f);
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AXSetMultiVoiceVe(ax->mvoice, &ve);
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AXSetMultiVoiceDeviceMix(ax->mvoice, AX_DEVICE_TYPE_DRC, 0, 0, 0x8000, 0);
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AXSetMultiVoiceDeviceMix(ax->mvoice, AX_DEVICE_TYPE_TV, 0, 0, 0x8000, 0);
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AXSetMultiVoiceState(ax->mvoice, AX_VOICE_STATE_STOPPED);
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ax->pos = 0;
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ax->written = 0;
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*new_rate = AX_AUDIO_RATE;
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OSInitSpinLock(&ax->spinlock);
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wiiu_cb_ax = ax;
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AXRegisterFrameCallback(wiiu_ax_callback);
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return ax;
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}
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static void ax_audio_free(void* data)
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{
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ax_audio_t* ax = (ax_audio_t*)data;
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wiiu_cb_ax = NULL;
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AXRegisterFrameCallback(NULL);
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AXFreeMultiVoice(ax->mvoice);
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AXQuit();
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MEM1_free(ax->buffer_l);
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MEM1_free(ax->buffer_r);
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free(ax);
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}
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static bool ax_audio_stop(void* data)
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{
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ax_audio_t* ax = (ax_audio_t*)data;
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AXSetMultiVoiceState(ax->mvoice, AX_VOICE_STATE_STOPPED);
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return true;
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}
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static int ax_audio_limit(int in)
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{
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if (in < 0)
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in += AX_AUDIO_COUNT;
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else if (in >= AX_AUDIO_COUNT)
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in -= AX_AUDIO_COUNT;
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return in;
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}
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static bool ax_audio_start(void* data, bool is_shutdown)
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{
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ax_audio_t* ax = (ax_audio_t*)data;
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/* Prevents restarting audio when the menu
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* is toggled off on shutdown */
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if (is_shutdown)
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return true;
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/* Set back to playing on enough buffered data */
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if (ax->written > AX_AUDIO_SAMPLE_LOAD)
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{
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AXSetMultiVoiceCurrentOffset(ax->mvoice,
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ax_audio_limit(ax->pos - ax->written));
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AXSetMultiVoiceState(ax->mvoice, AX_VOICE_STATE_PLAYING);
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}
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return true;
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}
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static ssize_t ax_audio_write(void* data, const void* buf, size_t size)
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{
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uint32_t i;
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size_t count_avail = 0;
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ax_audio_t* ax = (ax_audio_t*)data;
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const uint16_t* src = buf;
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size_t count = size >> 2;
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if (!size || (size & 0x3))
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return 0;
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if (count > AX_AUDIO_MAX_FREE)
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count = AX_AUDIO_MAX_FREE;
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count_avail = (
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(ax->written > AX_AUDIO_MAX_FREE)
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? 0
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: (AX_AUDIO_MAX_FREE - ax->written));
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if (ax->nonblock)
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{
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/* Not enough available for 3ms of data */
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if (count_avail < AX_AUDIO_SAMPLE_COUNT)
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count = 0;
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}
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else if (count_avail < count)
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{
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/* Sync, wait for free memory */
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while (AXIsMultiVoiceRunning(ax->mvoice) && (count_avail < count))
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{
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OSYieldThread(); /* Gives threads with same priority time to run */
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count_avail = (ax->written > AX_AUDIO_MAX_FREE ? 0 : (AX_AUDIO_MAX_FREE - ax->written));
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}
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}
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/* Over available space, do as much as possible */
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if (count > count_avail)
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count = count_avail;
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/* make sure we have input size */
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if (count > 0)
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{
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/* write in new data */
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size_t start_pos = ax->pos;
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int flush_p2_needed = 0;
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int flush_p2 = 0;
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for (i = 0; i < (count << 1); i += 2)
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{
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ax->buffer_l[ax->pos] = src[i];
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ax->buffer_r[ax->pos] = src[i + 1];
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ax->pos = ax_audio_limit(ax->pos + 1);
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/* wrapped around, make sure to store cache */
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if (ax->pos == 0)
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{
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flush_p2_needed = 1;
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flush_p2 = ((count << 1) - i);
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DCStoreRangeNoSync(ax->buffer_l + start_pos,
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(AX_AUDIO_COUNT - start_pos) << 1);
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DCStoreRangeNoSync(ax->buffer_r + start_pos, (AX_AUDIO_COUNT - start_pos) << 1);
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}
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}
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/* standard cache store case */
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if (!flush_p2_needed)
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{
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DCStoreRangeNoSync(ax->buffer_l + start_pos, count << 1);
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DCStoreRange(ax->buffer_r + start_pos, count << 1);
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}
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/* store the rest after wrap */
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else if (flush_p2 > 0)
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{
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DCStoreRangeNoSync(ax->buffer_l, flush_p2);
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DCStoreRange(ax->buffer_r, flush_p2);
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}
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/* add in new audio data */
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if (OSUninterruptibleSpinLock_Acquire(&ax->spinlock))
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{
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ax->written += count;
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OSUninterruptibleSpinLock_Release(&ax->spinlock);
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}
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}
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/* Possibly buffer underrun
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*
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* checks if it can be started
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*/
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if (!AXIsMultiVoiceRunning(ax->mvoice))
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ax_audio_start(ax, false);
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/* return what was actually copied */
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return (count << 2);
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}
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static bool ax_audio_alive(void* data)
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{
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ax_audio_t* ax = (ax_audio_t*)data;
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return AXIsMultiVoiceRunning(ax->mvoice);
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}
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static void ax_audio_set_nonblock_state(void* data, bool state)
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{
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ax_audio_t* ax = (ax_audio_t*)data;
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if (ax)
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ax->nonblock = state;
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}
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static bool ax_audio_use_float(void* data) { return false; }
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static size_t ax_audio_write_avail(void* data)
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{
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ax_audio_t* ax = (ax_audio_t*)data;
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size_t ret = AX_AUDIO_COUNT - ax->written;
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return (ret < AX_AUDIO_SAMPLE_COUNT ? 0 : ret);
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}
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static size_t ax_audio_buffer_size(void* data)
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{
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return AX_AUDIO_COUNT;
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}
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audio_driver_t audio_ax =
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{
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ax_audio_init,
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ax_audio_write,
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ax_audio_stop,
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ax_audio_start,
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ax_audio_alive,
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ax_audio_set_nonblock_state,
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ax_audio_free,
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ax_audio_use_float,
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"AX",
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NULL, /* device_list_new */
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NULL, /* device_list_free */
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ax_audio_write_avail,
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ax_audio_buffer_size,
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};
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