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Potential fixes for Raspberry Pi.

pull/413/head
David Reid 7 年之前
父節點
a0d9913c7c
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82f88e5df9
共有 2 個文件被更改，包括 250 次插入 和 35 次删除
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  1. +4
    -4
      src/audio.c
  2. +246
    -31
      src/external/mini_al.h

+ 4
- 4
src/audio.c 查看文件

@ -401,10 +401,10 @@ void InitAudioDevice(void)
mal_device_config deviceConfig = mal_device_config_init(DEVICE_FORMAT, DEVICE_CHANNELS, DEVICE_SAMPLE_RATE, NULL, OnSendAudioDataToDevice);
// Special case for PLATFORM_RPI.
cp">#if defined(PLATFORM_RPI)
deviceConfig.alsa.noMMap = MAL_TRUE;
deviceConfig.bufferSizeInFrames = 2048;
cp">#endif
o">//#if defined(PLATFORM_RPI)
// deviceConfig.alsa.noMMap = MAL_TRUE;
// deviceConfig.bufferSizeInFrames = 2048;
o">//#endif
result = mal_device_init(&context, mal_device_type_playback, NULL, &deviceConfig, NULL, &device);
if (result != MAL_SUCCESS)

+ 246
- 31
src/external/mini_al.h 查看文件

@ -244,12 +244,13 @@ extern "C" {
#endif
#endif
#define MAL_SUPPORT_SDL // All platforms support SDL.
// Explicitly disable OpenAL and Null backends for Emscripten because they both use a background thread which is not properly supported right now.
#if !defined(MAL_EMSCRIPTEN)
#define MAL_SUPPORT_OPENAL
#define MAL_SUPPORT_NULL // All platforms support the null backend.
#endif
#define MAL_SUPPORT_SDL // All platforms support SDL.
#if !defined(MAL_NO_WASAPI) && defined(MAL_SUPPORT_WASAPI)
@ -758,6 +759,9 @@ struct mal_context
mal_proc snd_pcm_avail;
mal_proc snd_pcm_avail_update;
mal_proc snd_pcm_wait;
mal_proc snd_pcm_info;
mal_proc snd_pcm_info_sizeof;
mal_proc snd_pcm_info_get_name;
} alsa;
#endif
#ifdef MAL_SUPPORT_COREAUDIO
@ -862,8 +866,9 @@ struct mal_context
mal_proc alGetBuffer3i;
mal_proc alGetBufferiv;
mal_uint32 isFloat32Supported : 1;
mal_uint32 isMCFormatsSupported : 1;
mal_bool32 isEnumerationSupported : 1;
mal_bool32 isFloat32Supported : 1;
mal_bool32 isMCFormatsSupported : 1;
} openal;
#endif
#ifdef MAL_SUPPORT_SDL
@ -1457,6 +1462,8 @@ mal_uint32 mal_dsp_read_frames_ex(mal_dsp* pDSP, mal_uint32 frameCount, void* pF
// This function is useful for one-off bulk conversions, but if you're streaming data you should use the DSP APIs instead.
mal_uint32 mal_convert_frames(void* pOut, mal_format formatOut, mal_uint32 channelsOut, mal_uint32 sampleRateOut, const void* pIn, mal_format formatIn, mal_uint32 channelsIn, mal_uint32 sampleRateIn, mal_uint32 frameCountIn);
// Helper for initializing a mal_dsp_config object.
mal_dsp_config mal_dsp_config_init(mal_format formatIn, mal_uint32 channelsIn, mal_uint32 sampleRateIn, mal_format formatOut, mal_uint32 channelsOut, mal_uint32 sampleRateOut);
///////////////////////////////////////////////////////////////////////////////
//
@ -1583,7 +1590,7 @@ void mal_pcm_convert(void* pOut, mal_format formatOut, const void* pIn, mal_form
// Disable run-time linking on certain backends.
#ifndef MAL_NO_RUNTIME_LINLING
#ifndef MAL_NO_RUNTIME_LINKING
#if defined(MAL_ANDROID) || defined(MAL_EMSCRIPTEN)
#define MAL_NO_RUNTIME_LINKING
#endif
@ -5472,6 +5479,33 @@ static mal_result mal_device__main_loop__winmm(mal_device* pDevice)
#ifdef MAL_HAS_ALSA
#include <alsa/asoundlib.h>
// This array allows mini_al to control device-specific default buffer sizes. This uses a scaling factor. Order is important. If
// any part of the string is present in the device's name, the associated scale will be used.
struct
{
const char* name;
float scale;
} g_malDefaultBufferSizeScalesALSA[] = {
{"bcm2835 IEC958/HDMI", 32},
{"bcm2835 ALSA", 32}
};
static float mal_find_default_buffer_size_scale__alsa(const char* deviceName)
{
if (deviceName == NULL) {
return 1;
}
for (size_t i = 0; i < mal_countof(g_malDefaultBufferSizeScalesALSA); ++i) {
if (strstr(g_malDefaultBufferSizeScalesALSA[i].name, deviceName) != NULL) {
return g_malDefaultBufferSizeScalesALSA[i].scale;
}
}
return 1;
}
typedef int (* mal_snd_pcm_open_proc) (snd_pcm_t **pcm, const char *name, snd_pcm_stream_t stream, int mode);
typedef int (* mal_snd_pcm_close_proc) (snd_pcm_t *pcm);
typedef size_t (* mal_snd_pcm_hw_params_sizeof_proc) (void);
@ -5515,6 +5549,9 @@ typedef snd_pcm_sframes_t (* mal_snd_pcm_writei_proc) (sn
typedef snd_pcm_sframes_t (* mal_snd_pcm_avail_proc) (snd_pcm_t *pcm);
typedef snd_pcm_sframes_t (* mal_snd_pcm_avail_update_proc) (snd_pcm_t *pcm);
typedef int (* mal_snd_pcm_wait_proc) (snd_pcm_t *pcm, int timeout);
typedef int (* mal_snd_pcm_info) (snd_pcm_t *pcm, snd_pcm_info_t* info);
typedef size_t (* mal_snd_pcm_info_sizeof) ();
typedef const char* (* mal_snd_pcm_info_get_name) (const snd_pcm_info_t* info);
static snd_pcm_format_t g_mal_ALSAFormats[] = {
SND_PCM_FORMAT_UNKNOWN, // mal_format_unknown
@ -5630,6 +5667,9 @@ mal_result mal_context_init__alsa(mal_context* pContext)
pContext->alsa.snd_pcm_avail = (mal_proc)mal_dlsym(pContext->alsa.asoundSO, "snd_pcm_avail");
pContext->alsa.snd_pcm_avail_update = (mal_proc)mal_dlsym(pContext->alsa.asoundSO, "snd_pcm_avail_update");
pContext->alsa.snd_pcm_wait = (mal_proc)mal_dlsym(pContext->alsa.asoundSO, "snd_pcm_wait");
pContext->alsa.snd_pcm_info = (mal_proc)mal_dlsym(pContext->alsa.asoundSO, "snd_pcm_info");
pContext->alsa.snd_pcm_info_sizeof = (mal_proc)mal_dlsym(pContext->alsa.asoundSO, "snd_pcm_info_sizeof");
pContext->alsa.snd_pcm_info_get_name = (mal_proc)mal_dlsym(pContext->alsa.asoundSO, "snd_pcm_info_get_name");
return MAL_SUCCESS;
}
@ -6300,6 +6340,57 @@ static mal_result mal_device_init__alsa(mal_context* pContext, mal_device_type t
}
}
// We may need to scale the size of the buffer depending on the device.
if (pDevice->usingDefaultBufferSize) {
float bufferSizeScale = 1;
snd_pcm_info_t* pInfo = (snd_pcm_info_t*)alloca(((mal_snd_pcm_info_sizeof)pContext->alsa.snd_pcm_info_sizeof)());
mal_zero_memory(pInfo, ((mal_snd_pcm_info_sizeof)pContext->alsa.snd_pcm_info_sizeof)());
if (((mal_snd_pcm_info)pContext->alsa.snd_pcm_info)((snd_pcm_t*)pDevice->alsa.pPCM, pInfo) == 0) {
const char* deviceName = ((mal_snd_pcm_info_get_name)pContext->alsa.snd_pcm_info_get_name)(pInfo);
if (deviceName != NULL) {
if (strcmp(deviceName, "default") == 0) {
// It's the default device. We need to use DESC from snd_device_name_hint().
char** ppDeviceHints;
if (((mal_snd_device_name_hint_proc)pContext->alsa.snd_device_name_hint)(-1, "pcm", (void***)&ppDeviceHints) < 0) {
return MAL_NO_BACKEND;
}
char** ppNextDeviceHint = ppDeviceHints;
while (*ppNextDeviceHint != NULL) {
char* NAME = ((mal_snd_device_name_get_hint_proc)pContext->alsa.snd_device_name_get_hint)(*ppNextDeviceHint, "NAME");
char* DESC = ((mal_snd_device_name_get_hint_proc)pContext->alsa.snd_device_name_get_hint)(*ppNextDeviceHint, "DESC");
char* IOID = ((mal_snd_device_name_get_hint_proc)pContext->alsa.snd_device_name_get_hint)(*ppNextDeviceHint, "IOID");
mal_bool32 foundDevice = MAL_FALSE;
if ((type == mal_device_type_playback && (IOID == NULL || strcmp(IOID, "Output") == 0)) ||
(type == mal_device_type_capture && (IOID != NULL && strcmp(IOID, "Input" ) == 0))) {
if (strcmp(NAME, deviceName) == 0) {
bufferSizeScale = mal_find_default_buffer_size_scale__alsa(DESC);
foundDevice = MAL_TRUE;
}
}
free(NAME);
free(DESC);
free(IOID);
if (foundDevice) {
break;
}
}
((mal_snd_device_name_free_hint_proc)pContext->alsa.snd_device_name_free_hint)((void**)ppDeviceHints);
} else {
bufferSizeScale = mal_find_default_buffer_size_scale__alsa(deviceName);
}
}
pDevice->bufferSizeInFrames = (mal_uint32)(pDevice->bufferSizeInFrames * bufferSizeScale);
}
}
// Hardware parameters.
snd_pcm_hw_params_t* pHWParams = (snd_pcm_hw_params_t*)alloca(((mal_snd_pcm_hw_params_sizeof_proc)pContext->alsa.snd_pcm_hw_params_sizeof)());
@ -7658,6 +7749,16 @@ static mal_result mal_device__stop_backend__opensl(mal_device* pDevice)
#define MAL_AL_APIENTRY
#endif
#ifdef MAL_NO_RUNTIME_LINKING
#if defined(MAL_APPLE)
#include <OpenAL/al.h>
#include <OpenAL/alc.h>
#else
#include <AL/al.h>
#include <AL/alc.h>
#endif
#endif
typedef struct mal_ALCdevice_struct mal_ALCdevice;
typedef struct mal_ALCcontext_struct mal_ALCcontext;
typedef char mal_ALCboolean;
@ -7804,6 +7905,7 @@ mal_result mal_context_init__openal(mal_context* pContext)
{
mal_assert(pContext != NULL);
#ifndef MAL_NO_RUNTIME_LINKING
const char* libName = NULL;
#ifdef MAL_WIN32
libName = "OpenAL32.dll";
@ -7910,13 +8012,89 @@ mal_result mal_context_init__openal(mal_context* pContext)
pContext->openal.alGetBufferi = (mal_proc)mal_dlsym(pContext->openal.hOpenAL, "alGetBufferi");
pContext->openal.alGetBuffer3i = (mal_proc)mal_dlsym(pContext->openal.hOpenAL, "alGetBuffer3i");
pContext->openal.alGetBufferiv = (mal_proc)mal_dlsym(pContext->openal.hOpenAL, "alGetBufferiv");
// We depend on the ALC_ENUMERATION_EXT extension.
if (!((MAL_LPALCISEXTENSIONPRESENT)pContext->openal.alcIsExtensionPresent)(NULL, "ALC_ENUMERATION_EXT")) {
mal_dlclose(pContext->openal.hOpenAL);
return MAL_FAILED_TO_INIT_BACKEND;
}
#else
pContext->openal.alcCreateContext = (mal_proc)alcCreateContext;
pContext->openal.alcMakeContextCurrent = (mal_proc)alcMakeContextCurrent;
pContext->openal.alcProcessContext = (mal_proc)alcProcessContext;
pContext->openal.alcSuspendContext = (mal_proc)alcSuspendContext;
pContext->openal.alcDestroyContext = (mal_proc)alcDestroyContext;
pContext->openal.alcGetCurrentContext = (mal_proc)alcGetCurrentContext;
pContext->openal.alcGetContextsDevice = (mal_proc)alcGetContextsDevice;
pContext->openal.alcOpenDevice = (mal_proc)alcOpenDevice;
pContext->openal.alcCloseDevice = (mal_proc)alcCloseDevice;
pContext->openal.alcGetError = (mal_proc)alcGetError;
pContext->openal.alcIsExtensionPresent = (mal_proc)alcIsExtensionPresent;
pContext->openal.alcGetProcAddress = (mal_proc)alcGetProcAddress;
pContext->openal.alcGetEnumValue = (mal_proc)alcGetEnumValue;
pContext->openal.alcGetString = (mal_proc)alcGetString;
pContext->openal.alcGetIntegerv = (mal_proc)alcGetIntegerv;
pContext->openal.alcCaptureOpenDevice = (mal_proc)alcCaptureOpenDevice;
pContext->openal.alcCaptureCloseDevice = (mal_proc)alcCaptureCloseDevice;
pContext->openal.alcCaptureStart = (mal_proc)alcCaptureStart;
pContext->openal.alcCaptureStop = (mal_proc)alcCaptureStop;
pContext->openal.alcCaptureSamples = (mal_proc)alcCaptureSamples;
pContext->openal.alEnable = (mal_proc)alEnable;
pContext->openal.alDisable = (mal_proc)alDisable;
pContext->openal.alIsEnabled = (mal_proc)alIsEnabled;
pContext->openal.alGetString = (mal_proc)alGetString;
pContext->openal.alGetBooleanv = (mal_proc)alGetBooleanv;
pContext->openal.alGetIntegerv = (mal_proc)alGetIntegerv;
pContext->openal.alGetFloatv = (mal_proc)alGetFloatv;
pContext->openal.alGetDoublev = (mal_proc)alGetDoublev;
pContext->openal.alGetBoolean = (mal_proc)alGetBoolean;
pContext->openal.alGetInteger = (mal_proc)alGetInteger;
pContext->openal.alGetFloat = (mal_proc)alGetFloat;
pContext->openal.alGetDouble = (mal_proc)alGetDouble;
pContext->openal.alGetError = (mal_proc)alGetError;
pContext->openal.alIsExtensionPresent = (mal_proc)alIsExtensionPresent;
pContext->openal.alGetProcAddress = (mal_proc)alGetProcAddress;
pContext->openal.alGetEnumValue = (mal_proc)alGetEnumValue;
pContext->openal.alGenSources = (mal_proc)alGenSources;
pContext->openal.alDeleteSources = (mal_proc)alDeleteSources;
pContext->openal.alIsSource = (mal_proc)alIsSource;
pContext->openal.alSourcef = (mal_proc)alSourcef;
pContext->openal.alSource3f = (mal_proc)alSource3f;
pContext->openal.alSourcefv = (mal_proc)alSourcefv;
pContext->openal.alSourcei = (mal_proc)alSourcei;
pContext->openal.alSource3i = (mal_proc)alSource3i;
pContext->openal.alSourceiv = (mal_proc)alSourceiv;
pContext->openal.alGetSourcef = (mal_proc)alGetSourcef;
pContext->openal.alGetSource3f = (mal_proc)alGetSource3f;
pContext->openal.alGetSourcefv = (mal_proc)alGetSourcefv;
pContext->openal.alGetSourcei = (mal_proc)alGetSourcei;
pContext->openal.alGetSource3i = (mal_proc)alGetSource3i;
pContext->openal.alGetSourceiv = (mal_proc)alGetSourceiv;
pContext->openal.alSourcePlayv = (mal_proc)alSourcePlayv;
pContext->openal.alSourceStopv = (mal_proc)alSourceStopv;
pContext->openal.alSourceRewindv = (mal_proc)alSourceRewindv;
pContext->openal.alSourcePausev = (mal_proc)alSourcePausev;
pContext->openal.alSourcePlay = (mal_proc)alSourcePlay;
pContext->openal.alSourceStop = (mal_proc)alSourceStop;
pContext->openal.alSourceRewind = (mal_proc)alSourceRewind;
pContext->openal.alSourcePause = (mal_proc)alSourcePause;
pContext->openal.alSourceQueueBuffers = (mal_proc)alSourceQueueBuffers;
pContext->openal.alSourceUnqueueBuffers = (mal_proc)alSourceUnqueueBuffers;
pContext->openal.alGenBuffers = (mal_proc)alGenBuffers;
pContext->openal.alDeleteBuffers = (mal_proc)alDeleteBuffers;
pContext->openal.alIsBuffer = (mal_proc)alIsBuffer;
pContext->openal.alBufferData = (mal_proc)alBufferData;
pContext->openal.alBufferf = (mal_proc)alBufferf;
pContext->openal.alBuffer3f = (mal_proc)alBuffer3f;
pContext->openal.alBufferfv = (mal_proc)alBufferfv;
pContext->openal.alBufferi = (mal_proc)alBufferi;
pContext->openal.alBuffer3i = (mal_proc)alBuffer3i;
pContext->openal.alBufferiv = (mal_proc)alBufferiv;
pContext->openal.alGetBufferf = (mal_proc)alGetBufferf;
pContext->openal.alGetBuffer3f = (mal_proc)alGetBuffer3f;
pContext->openal.alGetBufferfv = (mal_proc)alGetBufferfv;
pContext->openal.alGetBufferi = (mal_proc)alGetBufferi;
pContext->openal.alGetBuffer3i = (mal_proc)alGetBuffer3i;
pContext->openal.alGetBufferiv = (mal_proc)alGetBufferiv;
#endif
// We depend on the ALC_ENUMERATION_EXT extension for enumeration. If this is not supported we fall back to default devices.
pContext->openal.isEnumerationSupported = ((MAL_LPALCISEXTENSIONPRESENT)pContext->openal.alcIsExtensionPresent)(NULL, "ALC_ENUMERATION_EXT");
pContext->openal.isFloat32Supported = ((MAL_LPALISEXTENSIONPRESENT)pContext->openal.alIsExtensionPresent)("AL_EXT_float32");
pContext->openal.isMCFormatsSupported = ((MAL_LPALISEXTENSIONPRESENT)pContext->openal.alIsExtensionPresent)("AL_EXT_MCFORMATS");
@ -7928,7 +8106,10 @@ mal_result mal_context_uninit__openal(mal_context* pContext)
mal_assert(pContext != NULL);
mal_assert(pContext->backend == mal_backend_openal);
#ifndef MAL_NO_RUNTIME_LINKING
mal_dlclose(pContext->openal.hOpenAL);
#endif
return MAL_SUCCESS;
}
@ -7937,35 +8118,55 @@ mal_result mal_enumerate_devices__openal(mal_context* pContext, mal_device_type
mal_uint32 infoSize = *pCount;
*pCount = 0;
const mal_ALCchar* pDeviceNames = ((MAL_LPALCGETSTRING)pContext->openal.alcGetString)(NULL, (type == mal_device_type_playback) ? MAL_ALC_DEVICE_SPECIFIER : MAL_ALC_CAPTURE_DEVICE_SPECIFIER);
if (pDeviceNames == NULL) {
return MAL_NO_DEVICE;
}
if (pContext->openal.isEnumerationSupported) {
const mal_ALCchar* pDeviceNames = ((MAL_LPALCGETSTRING)pContext->openal.alcGetString)(NULL, (type == mal_device_type_playback) ? MAL_ALC_DEVICE_SPECIFIER : MAL_ALC_CAPTURE_DEVICE_SPECIFIER);
if (pDeviceNames == NULL) {
return MAL_NO_DEVICE;
}
// Each device is stored in pDeviceNames, separated by a null-terminator. The string itself is double-null-terminated.
const mal_ALCchar* pNextDeviceName = pDeviceNames;
while (pNextDeviceName[0] != '\0') {
// Each device is stored in pDeviceNames, separated by a null-terminator. The string itself is double-null-terminated.
const mal_ALCchar* pNextDeviceName = pDeviceNames;
while (pNextDeviceName[0] != '\0') {
if (pInfo != NULL) {
if (infoSize > 0) {
mal_strncpy_s(pInfo->id.openal, sizeof(pInfo->id.openal), (const char*)pNextDeviceName, (size_t)-1);
mal_strncpy_s(pInfo->name, sizeof(pInfo->name), (const char*)pNextDeviceName, (size_t)-1);
pInfo += 1;
infoSize -= 1;
*pCount += 1;
}
} else {
*pCount += 1;
}
// Move to the next device name.
while (*pNextDeviceName != '\0') {
pNextDeviceName += 1;
}
// Skip past the null terminator.
pNextDeviceName += 1;
};
} else {
// Enumeration is not supported. Use default devices.
if (pInfo != NULL) {
if (infoSize > 0) {
mal_strncpy_s(pInfo->id.openal, sizeof(pInfo->id.openal), (const char*)pNextDeviceName, (size_t)-1);
mal_strncpy_s(pInfo->name, sizeof(pInfo->name), (const char*)pNextDeviceName, (size_t)-1);
if (type == mal_device_type_playback) {
pInfo->id.sdl = 0;
mal_strncpy_s(pInfo->name, sizeof(pInfo->name), "Default Playback Device", (size_t)-1);
} else {
pInfo->id.sdl = 0;
mal_strncpy_s(pInfo->name, sizeof(pInfo->name), "Default Capture Device", (size_t)-1);
}
pInfo += 1;
infoSize -= 1;
*pCount += 1;
}
} else {
*pCount += 1;
}
// Move to the next device name.
while (*pNextDeviceName != '\0') {
pNextDeviceName += 1;
}
// Skip past the null terminator.
pNextDeviceName += 1;
};
}
return MAL_SUCCESS;
}
@ -8043,7 +8244,7 @@ mal_result mal_device_init__openal(mal_context* pContext, mal_device_type type,
}
if (formatAL == 0) {
return MAL_FORMAT_NOT_SUPPORTED;
return f">mal_context_post_error(pContext, NULL, "[OpenAL] Format not supported.", MAL_FORMAT_NOT_SUPPORTED);
}
bufferSizeInSamplesAL *= channelsAL;
@ -10954,6 +11155,20 @@ mal_uint32 mal_convert_frames(void* pOut, mal_format formatOut, mal_uint32 chann
return mal_dsp_read_frames_ex(&dsp, frameCountOut, pOut, MAL_TRUE);
}
mal_dsp_config mal_dsp_config_init(mal_format formatIn, mal_uint32 channelsIn, mal_uint32 sampleRateIn, mal_format formatOut, mal_uint32 channelsOut, mal_uint32 sampleRateOut)
{
mal_dsp_config config;
mal_zero_object(&config);
config.formatIn = formatIn;
config.channelsIn = channelsIn;
config.sampleRateIn = sampleRateIn;
config.formatOut = formatOut;
config.channelsOut = channelsOut;
config.sampleRateOut = sampleRateOut;
return config;
}

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