Initial commit

arm9/source/bgm/AudioStreamPlayer.h

@@ -0,0 +1,106 @@
+#pragma once
+#include "common.h"
+#include <memory>
+#include <libtwl/rtos/rtosMutex.h>
+#include <libtwl/rtos/rtosThread.h>
+#include <libtwl/rtos/rtosEvent.h>
+#include <../../libtwl7/include/libtwl/sound/soundChannel.h>
+#include "fat/File.h"
+#include "soundIpcCommand.h"
+#include "IAudioStreamPlayer.h"
+
+#define AUDIO_STREAM_PLAYER_RING_BLOCKS     32
+#define AUDIO_STREAM_PLAYER_BLOCK_SAMPLES   256
+
+/// @brief Class implementing an audio stream player.
+class alignas(32) AudioStreamPlayer : public IAudioStreamPlayer
+{
+public:
+    AudioStreamPlayer();
+
+    ~AudioStreamPlayer()
+    {
+        StopPlayback();
+    }
+
+    bool StartPlayback(std::unique_ptr<IAudioStream> audioStream) override
+    {
+        bool result;
+        rtos_lockMutex(&_mutex);
+        {
+            result = StartPlaybackIntern(std::move(audioStream));
+        }
+        rtos_unlockMutex(&_mutex);
+        return result;
+    }
+
+    void StopPlayback() override
+    {
+        rtos_lockMutex(&_mutex);
+        {
+            StopPlaybackIntern();
+        }
+        rtos_unlockMutex(&_mutex);
+    }
+
+private:
+    struct alignas(32) SoundStartCmdList
+    {
+        u32 cmdCount;
+        snd_ipc_cmd_setup_channel_t leftSetup;
+        snd_ipc_cmd_setup_channel_t rightSetup;
+        u32 startChannels;
+    };
+
+    struct alignas(32) SoundStopCmdList
+    {
+        u32 cmdCount;
+        u32 stopChannels;
+    };
+
+    s16 _audioRingL[AUDIO_STREAM_PLAYER_RING_BLOCKS][AUDIO_STREAM_PLAYER_BLOCK_SAMPLES] alignas(32);
+    s16 _audioRingR[AUDIO_STREAM_PLAYER_RING_BLOCKS][AUDIO_STREAM_PLAYER_BLOCK_SAMPLES] alignas(32);
+    SoundStartCmdList _soundStartCmdList alignas(32)
+    {
+        3,
+        {
+            SND_IPC_CMD_SETUP_CHANNEL,
+            0,
+            _audioRingL,
+            0,
+            0,
+            sizeof(_audioRingL) >> 2,
+            SOUNDCNT_VOLUME(127) | SOUNDCNT_MODE_LOOP | SOUNDCNT_FORMAT_PCM16
+        },
+        {
+            SND_IPC_CMD_SETUP_CHANNEL,
+            1,
+            _audioRingR,
+            0,
+            0,
+            sizeof(_audioRingR) >> 2,
+            SOUNDCNT_VOLUME(127) | SOUNDCNT_PAN(127) | SOUNDCNT_MODE_LOOP | SOUNDCNT_FORMAT_PCM16
+        },
+        (0b11 << 8) | SND_IPC_CMD_START_CHANNELS
+    };
+    SoundStopCmdList _soundStopCmdList alignas(32)
+    {
+        1,
+        (0b11 << 8) | SND_IPC_CMD_STOP_CHANNELS
+    };
+    u32 _threadStack[2048 / sizeof(u32)] alignas(32);
+    rtos_mutex_t _mutex;
+    rtos_thread_t _thread;
+    rtos_event_t _event;
+    volatile bool _isPlaying = false;
+    volatile u8 _readBlock;
+    volatile u8 _writeBlock;
+    std::unique_ptr<IAudioStream> _audioStream;
+
+    static AudioStreamPlayer* sCurrentPlayer;
+
+    bool StartPlaybackIntern(std::unique_ptr<IAudioStream> audioStream);
+    void StopPlaybackIntern();
+    void ThreadMain();
+    void FillRingBlock(u32 block);
+};