From 0e40828c19096e7c8e8267396c42b5902097c67e Mon Sep 17 00:00:00 2001 From: Mike H Date: Sat, 17 Feb 2018 16:40:59 +0000 Subject: [PATCH] Initial audio support (#43) Initial audio support --- nx/include/switch.h | 1 + nx/include/switch/services/audout.h | 61 ++++ nx/source/services/audout.c | 445 ++++++++++++++++++++++++++++ 3 files changed, 507 insertions(+) create mode 100644 nx/include/switch/services/audout.h create mode 100644 nx/source/services/audout.c diff --git a/nx/include/switch.h b/nx/include/switch.h index 706160a3..006fa1f0 100644 --- a/nx/include/switch.h +++ b/nx/include/switch.h @@ -32,6 +32,7 @@ extern "C" { #include "switch/services/acc.h" #include "switch/services/apm.h" #include "switch/services/applet.h" +#include "switch/services/audout.h" #include "switch/services/bsd.h" #include "switch/services/fatal.h" #include "switch/services/usb.h" diff --git a/nx/include/switch/services/audout.h b/nx/include/switch/services/audout.h new file mode 100644 index 00000000..1f8a20a5 --- /dev/null +++ b/nx/include/switch/services/audout.h @@ -0,0 +1,61 @@ +/** + * @file audout.h + * @brief Audio output service. + * @author hexkyz + * @copyright libnx Authors + */ +#pragma once + +#include "../types.h" + +typedef enum { + PcmFormat_Invalid = 0, + PcmFormat_INT8 = 1, + PcmFormat_INT16 = 2, + PcmFormat_INT24 = 3, + PcmFormat_INT32 = 4, + PcmFormat_FLOAT = 5, + PcmFormat_ADPCM = 6, +} PcmFormat; + +typedef enum { + AudioOutState_Started = 0, + AudioOutState_Stopped = 1, +} AudioOutState; + +/// Audio output buffer format +typedef struct AudioOutBuffer AudioOutBuffer; + +struct AudioOutBuffer +{ + AudioOutBuffer* next; ///< Next buffer. + void* buffer; ///< Sample buffer. + u64 buffer_size; ///< Sample buffer size. + u64 data_size; ///< Size of data inside the buffer. + u64 data_offset; ///< Offset of data inside the buffer. +}; + +Result audoutInitialize(void); +void audoutExit(void); + +Result audoutListAudioOuts(char *DeviceNames, u32 *DeviceNamesCount); +Result audoutOpenAudioOut(const char *DeviceNameIn, char *DeviceNameOut, u32 SampleRateIn, u32 ChannelCountIn, u32 *SampleRateOut, u32 *ChannelCountOut, PcmFormat *Format, AudioOutState *State); +Result audoutGetAudioOutState(AudioOutState *State); +Result audoutStartAudioOut(void); +Result audoutStopAudioOut(void); +Result audoutAppendAudioOutBuffer(AudioOutBuffer *Buffer); +Result audoutGetReleasedAudioOutBuffer(AudioOutBuffer *Buffer, u32 *ReleasedBuffersCount); +Result audoutContainsAudioOutBuffer(AudioOutBuffer *Buffer, bool *ContainsBuffer); + +/** + * @brief Submits an audio sample data buffer for playing. + * @param source AudioOutBuffer containing the source sample data to be played. + * @param released AudioOutBuffer to receive the last played buffer. + */ +void audoutPlayBuffer(AudioOutBuffer *source, AudioOutBuffer *released); + +/// These return the state associated with the currently active audio output device. +u32 audoutGetSampleRate(void); ///< Supported sample rate (48000Hz). +u32 audoutGetChannelCount(void); ///< Supported channel count (2 channels). +PcmFormat audoutGetPcmFormat(void); ///< Supported PCM format (INT16). +AudioOutState audoutGetDeviceState(void); ///< Initial device state (stopped). diff --git a/nx/source/services/audout.c b/nx/source/services/audout.c new file mode 100644 index 00000000..9ca8d613 --- /dev/null +++ b/nx/source/services/audout.c @@ -0,0 +1,445 @@ +#include +#include "types.h" +#include "result.h" +#include "ipc.h" +#include "services/audout.h" +#include "services/sm.h" + +#define DEVICE_NAME_LENGTH 0x100 +#define DEFAULT_SAMPLE_RATE 0xBB80 +#define DEFAULT_CHANNEL_COUNT 0x00020000 + +static Service g_audoutSrv; +static Service g_audoutIAudioOut; + +static Handle g_audoutBufferEventHandle = INVALID_HANDLE; + +static u32 g_sampleRate = 0; +static u32 g_channelCount = 0; +static PcmFormat g_pcmFormat = PcmFormat_Invalid; +static AudioOutState g_deviceState = AudioOutState_Stopped; + +static Result _audoutRegisterBufferEvent(Handle *BufferEvent); + +Result audoutInitialize(void) +{ + if (serviceIsActive(&g_audoutSrv)) + return MAKERESULT(Module_Libnx, LibnxError_AlreadyInitialized); + + Result rc = 0; + rc = smGetService(&g_audoutSrv, "audout:u"); + + // Setup the default device + if (R_SUCCEEDED(rc)) + { + // Passing an empty device name will open the default "DeviceOut" + char DeviceNameIn[DEVICE_NAME_LENGTH] = {0}; + char DeviceNameOut[DEVICE_NAME_LENGTH] = {0}; + + // Open audio output device + rc = audoutOpenAudioOut(DeviceNameIn, DeviceNameOut, DEFAULT_SAMPLE_RATE, DEFAULT_CHANNEL_COUNT, &g_sampleRate, &g_channelCount, &g_pcmFormat, &g_deviceState); + } + + // Register global handle for buffer events + if (R_SUCCEEDED(rc)) + rc = _audoutRegisterBufferEvent(&g_audoutBufferEventHandle); + + if (R_FAILED(rc)) + audoutExit(); + + return rc; +} + +void audoutExit(void) +{ + if (g_audoutBufferEventHandle != INVALID_HANDLE) { + svcCloseHandle(g_audoutBufferEventHandle); + g_audoutBufferEventHandle = INVALID_HANDLE; + } + + g_sampleRate = 0; + g_channelCount = 0; + g_pcmFormat = PcmFormat_Invalid; + g_deviceState = AudioOutState_Stopped; + + serviceClose(&g_audoutIAudioOut); + serviceClose(&g_audoutSrv); +} + +u32 audoutGetSampleRate(void) { + return g_sampleRate; +} + +u32 audoutGetChannelCount(void) { + return g_channelCount; +} + +PcmFormat audoutGetPcmFormat(void) { + return g_pcmFormat; +} + +AudioOutState audoutGetDeviceState(void) { + return g_deviceState; +} + +void audoutPlayBuffer(AudioOutBuffer *source, AudioOutBuffer *released) { + // Try to push the supplied buffer to the audio output device + Result do_append = audoutAppendAudioOutBuffer(source); + + if (R_SUCCEEDED(do_append)) + { + // Wait on the buffer event handle + Result do_wait = svcWaitSynchronizationSingle(g_audoutBufferEventHandle, U64_MAX); + + if (R_SUCCEEDED(do_wait)) + { + svcResetSignal(g_audoutBufferEventHandle); + + u32 released_count = 0; + Result do_release = audoutGetReleasedAudioOutBuffer(released, &released_count); + + // Ensure that all buffers are released and return the last one only + while (R_SUCCEEDED(do_release) && (released_count > 0)) + do_release = audoutGetReleasedAudioOutBuffer(released, &released_count); + } + } +} + +Result audoutListAudioOuts(char *DeviceNames, u32 *DeviceNamesCount) { + IpcCommand c; + ipcInitialize(&c); + + struct { + u64 magic; + u64 cmd_id; + } *raw; + + ipcAddRecvBuffer(&c, DeviceNames, DEVICE_NAME_LENGTH, 0); + + raw = ipcPrepareHeader(&c, sizeof(*raw)); + + raw->magic = SFCI_MAGIC; + raw->cmd_id = 0; + + Result rc = serviceIpcDispatch(&g_audoutSrv); + + if (R_SUCCEEDED(rc)) { + IpcParsedCommand r; + ipcParse(&r); + + struct { + u64 magic; + u64 result; + u32 DeviceNamesCount; + } *resp = r.Raw; + + rc = resp->result; + + if (R_SUCCEEDED(rc) && DeviceNamesCount) + *DeviceNamesCount = resp->DeviceNamesCount; + } + + return rc; +} + +Result audoutOpenAudioOut(const char *DeviceNameIn, char *DeviceNameOut, u32 SampleRateIn, u32 ChannelCountIn, u32 *SampleRateOut, u32 *ChannelCountOut, PcmFormat *Format, AudioOutState *State) { + IpcCommand c; + ipcInitialize(&c); + + struct { + u64 magic; + u64 cmd_id; + u32 sample_rate; + u32 channel_count; + u64 client_pid; + } *raw; + + ipcSendPid(&c); + ipcSendHandleCopy(&c, CUR_PROCESS_HANDLE); + ipcAddSendBuffer(&c, DeviceNameIn, DEVICE_NAME_LENGTH, 0); + ipcAddRecvBuffer(&c, DeviceNameOut, DEVICE_NAME_LENGTH, 0); + + raw = ipcPrepareHeader(&c, sizeof(*raw)); + + raw->magic = SFCI_MAGIC; + raw->cmd_id = 1; + raw->sample_rate = SampleRateIn; + raw->channel_count = ChannelCountIn; + raw->client_pid = 0; + + Result rc = serviceIpcDispatch(&g_audoutSrv); + + if (R_SUCCEEDED(rc)) { + IpcParsedCommand r; + ipcParse(&r); + + struct { + u64 magic; + u64 result; + u32 sample_rate; + u32 channel_count; + u32 pcm_format; + u32 state; + } *resp = r.Raw; + + rc = resp->result; + + if (R_SUCCEEDED(rc)) { + serviceCreate(&g_audoutIAudioOut, r.Handles[0]); + + if (SampleRateOut) + *SampleRateOut = resp->sample_rate; + + if (ChannelCountOut) + *ChannelCountOut = resp->channel_count; + + if (Format) + *Format = resp->pcm_format; + + if (State) + *State = resp->state; + } + } + + return rc; +} + +Result audoutGetAudioOutState(AudioOutState *State) { + IpcCommand c; + ipcInitialize(&c); + + struct { + u64 magic; + u64 cmd_id; + } *raw; + + raw = ipcPrepareHeader(&c, sizeof(*raw)); + + raw->magic = SFCI_MAGIC; + raw->cmd_id = 0; + + Result rc = serviceIpcDispatch(&g_audoutIAudioOut); + + if (R_SUCCEEDED(rc)) { + IpcParsedCommand r; + ipcParse(&r); + + struct { + u64 magic; + u64 result; + u32 state; + } *resp = r.Raw; + + rc = resp->result; + + if (R_SUCCEEDED(rc) && State) + *State = resp->state; + } + + return rc; +} + +Result audoutStartAudioOut(void) { + IpcCommand c; + ipcInitialize(&c); + + struct { + u64 magic; + u64 cmd_id; + } *raw; + + raw = ipcPrepareHeader(&c, sizeof(*raw)); + + raw->magic = SFCI_MAGIC; + raw->cmd_id = 1; + + Result rc = serviceIpcDispatch(&g_audoutIAudioOut); + + if (R_SUCCEEDED(rc)) { + IpcParsedCommand r; + ipcParse(&r); + + struct { + u64 magic; + u64 result; + } *resp = r.Raw; + + rc = resp->result; + } + + return rc; +} + +Result audoutStopAudioOut(void) { + IpcCommand c; + ipcInitialize(&c); + + struct { + u64 magic; + u64 cmd_id; + } *raw; + + raw = ipcPrepareHeader(&c, sizeof(*raw)); + + raw->magic = SFCI_MAGIC; + raw->cmd_id = 2; + + Result rc = serviceIpcDispatch(&g_audoutIAudioOut); + + if (R_SUCCEEDED(rc)) { + IpcParsedCommand r; + ipcParse(&r); + + struct { + u64 magic; + u64 result; + } *resp = r.Raw; + + rc = resp->result; + } + + return rc; +} + +Result audoutAppendAudioOutBuffer(AudioOutBuffer *Buffer) { + IpcCommand c; + ipcInitialize(&c); + + struct { + u64 magic; + u64 cmd_id; + u64 tag; + } *raw; + + ipcAddSendBuffer(&c, Buffer, sizeof(AudioOutBuffer), 0); + + raw = ipcPrepareHeader(&c, sizeof(*raw)); + + raw->magic = SFCI_MAGIC; + raw->cmd_id = 3; + raw->tag = (u64)&Buffer; + + Result rc = serviceIpcDispatch(&g_audoutIAudioOut); + + if (R_SUCCEEDED(rc)) { + IpcParsedCommand r; + ipcParse(&r); + + struct { + u64 magic; + u64 result; + } *resp = r.Raw; + + rc = resp->result; + } + + return rc; +} + +static Result _audoutRegisterBufferEvent(Handle *BufferEvent) { + IpcCommand c; + ipcInitialize(&c); + + struct { + u64 magic; + u64 cmd_id; + } *raw; + + raw = ipcPrepareHeader(&c, sizeof(*raw)); + + raw->magic = SFCI_MAGIC; + raw->cmd_id = 4; + + Result rc = serviceIpcDispatch(&g_audoutIAudioOut); + + if (R_SUCCEEDED(rc)) { + IpcParsedCommand r; + ipcParse(&r); + + struct { + u64 magic; + u64 result; + } *resp = r.Raw; + + rc = resp->result; + + if (R_SUCCEEDED(rc) && BufferEvent) + *BufferEvent = r.Handles[0]; + } + + return rc; +} + +Result audoutGetReleasedAudioOutBuffer(AudioOutBuffer *Buffer, u32 *ReleasedBuffersCount) { + IpcCommand c; + ipcInitialize(&c); + + struct { + u64 magic; + u64 cmd_id; + } *raw; + + ipcAddRecvBuffer(&c, Buffer, sizeof(AudioOutBuffer), 0); + + raw = ipcPrepareHeader(&c, sizeof(*raw)); + + raw->magic = SFCI_MAGIC; + raw->cmd_id = 5; + + Result rc = serviceIpcDispatch(&g_audoutIAudioOut); + + if (R_SUCCEEDED(rc)) { + IpcParsedCommand r; + ipcParse(&r); + + struct { + u64 magic; + u64 result; + u32 released_buffers_count; + } *resp = r.Raw; + + rc = resp->result; + + if (R_SUCCEEDED(rc) && ReleasedBuffersCount) + *ReleasedBuffersCount = resp->released_buffers_count; + } + + return rc; +} + +Result audoutContainsAudioOutBuffer(AudioOutBuffer *Buffer, bool *ContainsBuffer) { + IpcCommand c; + ipcInitialize(&c); + + struct { + u64 magic; + u64 cmd_id; + u64 tag; + } *raw; + + raw = ipcPrepareHeader(&c, sizeof(*raw)); + + raw->magic = SFCI_MAGIC; + raw->cmd_id = 6; + raw->tag = (u64)&Buffer; + + Result rc = serviceIpcDispatch(&g_audoutIAudioOut); + + if (R_SUCCEEDED(rc)) { + IpcParsedCommand r; + ipcParse(&r); + + struct { + u64 magic; + u64 result; + u32 contains_buffer; + } *resp = r.Raw; + + rc = resp->result; + + if (R_SUCCEEDED(rc) && ContainsBuffer) + *ContainsBuffer = (resp->contains_buffer & 0x01); + } + + return rc; +}