mirror of
https://github.com/Ryujinx/SDL.git
synced 2025-11-04 13:44:50 +00:00
alsa: Implemented hotplug support, cleaned up device names.
This commit is contained in:
Ryan C. Gordon
parent
35e564a694
commit
850da32f30
|
|
@ -29,6 +29,7 @@
|
|||
#include <errno.h>
|
||||
#include <string.h>
|
||||
|
||||
#include "SDL_assert.h"
|
||||
#include "SDL_timer.h"
|
||||
#include "SDL_audio.h"
|
||||
#include "../SDL_audiomem.h"
|
||||
|
|
@ -660,92 +661,195 @@ ALSA_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
ALSA_Deinitialize(void)
|
||||
typedef struct ALSA_Device
|
||||
{
|
||||
UnloadALSALibrary();
|
||||
}
|
||||
char *name;
|
||||
SDL_bool iscapture;
|
||||
struct ALSA_Device *next;
|
||||
} ALSA_Device;
|
||||
|
||||
static void
|
||||
add_device(const int iscapture, const char *name, const char *_desc)
|
||||
add_device(const int iscapture, const char *name, void *hint, ALSA_Device **pSeen)
|
||||
{
|
||||
char *desc = NULL;
|
||||
ALSA_Device *dev = SDL_malloc(sizeof (ALSA_Device));
|
||||
char *desc = ALSA_snd_device_name_get_hint(hint, "DESC");
|
||||
char *handle = NULL;
|
||||
char *ptr = NULL;
|
||||
char *ptr;
|
||||
|
||||
if (!name || !_desc) {
|
||||
return; /* nothing we can do with this...? */
|
||||
}
|
||||
|
||||
desc = SDL_strdup(_desc);
|
||||
if (!desc) {
|
||||
return; /* oh well, out of memory. Skip it. */
|
||||
SDL_free(dev);
|
||||
return;
|
||||
} else if (!dev) {
|
||||
free(desc);
|
||||
return;
|
||||
}
|
||||
|
||||
/* some strings have newlines, like "HDA NVidia, HDMI 0\nHDMI Audio Output" */
|
||||
for (ptr = strchr(desc, '\n'); ptr; ptr = strchr(ptr + 1, '\n')) {
|
||||
*ptr = ' ';
|
||||
SDL_assert(name != NULL);
|
||||
|
||||
/* some strings have newlines, like "HDA NVidia, HDMI 0\nHDMI Audio Output".
|
||||
just chop the extra lines off, this seems to get a reasonable device
|
||||
name without extra details. */
|
||||
if ((ptr = strchr(desc, '\n')) != NULL) {
|
||||
*ptr = '\0';
|
||||
}
|
||||
|
||||
/*printf("ALSA: adding %s device '%s' (%s)\n", iscapture ? "capture" : "output", name, desc);*/
|
||||
|
||||
handle = SDL_strdup(name);
|
||||
if (handle != NULL) {
|
||||
SDL_AddAudioDevice(iscapture, desc, handle);
|
||||
if (!handle) {
|
||||
free(desc);
|
||||
SDL_free(dev);
|
||||
return;
|
||||
}
|
||||
|
||||
SDL_free(desc);
|
||||
SDL_AddAudioDevice(iscapture, desc, handle);
|
||||
free(desc);
|
||||
|
||||
dev->name = handle;
|
||||
dev->iscapture = iscapture;
|
||||
dev->next = *pSeen;
|
||||
*pSeen = dev;
|
||||
}
|
||||
|
||||
|
||||
static SDL_atomic_t ALSA_hotplug_shutdown;
|
||||
static SDL_Thread *ALSA_hotplug_thread;
|
||||
|
||||
static int SDLCALL
|
||||
ALSA_HotplugThread(void *arg)
|
||||
{
|
||||
SDL_sem *first_run_semaphore = (SDL_sem *) arg;
|
||||
ALSA_Device *devices = NULL;
|
||||
ALSA_Device *next;
|
||||
ALSA_Device *dev;
|
||||
Uint32 ticks;
|
||||
|
||||
while (!SDL_AtomicGet(&ALSA_hotplug_shutdown)) {
|
||||
void **hints = NULL;
|
||||
if (ALSA_snd_device_name_hint(-1, "pcm", &hints) != -1) {
|
||||
ALSA_Device *unseen = devices;
|
||||
ALSA_Device *seen = NULL;
|
||||
ALSA_Device *prev;
|
||||
int i;
|
||||
|
||||
for (i = 0; hints[i]; i++) {
|
||||
char *name = ALSA_snd_device_name_get_hint(hints[i], "NAME");
|
||||
if (!name) {
|
||||
continue;
|
||||
}
|
||||
|
||||
/* only want physical hardware interfaces */
|
||||
if (SDL_strncmp(name, "hw:", 3) == 0) {
|
||||
char *ioid = ALSA_snd_device_name_get_hint(hints[i], "IOID");
|
||||
const SDL_bool isoutput = (ioid == NULL) || (SDL_strcmp(ioid, "Output") == 0);
|
||||
const SDL_bool isinput = (ioid == NULL) || (SDL_strcmp(ioid, "Input") == 0);
|
||||
SDL_bool have_output = SDL_FALSE;
|
||||
SDL_bool have_input = SDL_FALSE;
|
||||
|
||||
free(ioid);
|
||||
|
||||
if (!isoutput && !isinput) {
|
||||
free(name);
|
||||
continue;
|
||||
}
|
||||
|
||||
prev = NULL;
|
||||
for (dev = unseen; dev; dev = next) {
|
||||
next = dev->next;
|
||||
if ( (SDL_strcmp(dev->name, name) == 0) && (((isinput) && dev->iscapture) || ((isoutput) && !dev->iscapture)) ) {
|
||||
if (prev) {
|
||||
prev->next = next;
|
||||
} else {
|
||||
unseen = next;
|
||||
}
|
||||
dev->next = seen;
|
||||
seen = dev;
|
||||
if (isinput) have_input = SDL_TRUE;
|
||||
if (isoutput) have_output = SDL_TRUE;
|
||||
} else {
|
||||
prev = dev;
|
||||
}
|
||||
}
|
||||
|
||||
if (isinput && !have_input) {
|
||||
add_device(SDL_TRUE, name, hints[i], &seen);
|
||||
}
|
||||
if (isoutput && !have_output) {
|
||||
add_device(SDL_FALSE, name, hints[i], &seen);
|
||||
}
|
||||
}
|
||||
|
||||
free(name);
|
||||
}
|
||||
|
||||
ALSA_snd_device_name_free_hint(hints);
|
||||
|
||||
devices = seen; /* now we have a known-good list of attached devices. */
|
||||
|
||||
/* report anything still in unseen as removed. */
|
||||
for (dev = unseen; dev; dev = next) {
|
||||
/*printf("ALSA: removing %s device '%s'\n", dev->iscapture ? "capture" : "output", dev->name);*/
|
||||
next = dev->next;
|
||||
SDL_RemoveAudioDevice(dev->iscapture, dev->name);
|
||||
SDL_free(dev->name);
|
||||
SDL_free(dev);
|
||||
}
|
||||
}
|
||||
|
||||
/* On first run, tell ALSA_DetectDevices() that we have a complete device list so it can return. */
|
||||
if (first_run_semaphore) {
|
||||
SDL_SemPost(first_run_semaphore);
|
||||
first_run_semaphore = NULL; /* let other thread clean it up. */
|
||||
}
|
||||
|
||||
/* Block awhile before checking again, unless we're told to stop. */
|
||||
ticks = SDL_GetTicks() + 5000;
|
||||
while (!SDL_AtomicGet(&ALSA_hotplug_shutdown) && !SDL_TICKS_PASSED(SDL_GetTicks(), ticks))
|
||||
SDL_Delay(100);
|
||||
}
|
||||
}
|
||||
|
||||
/* Shutting down! Clean up any data we've gathered. */
|
||||
for (dev = devices; dev; dev = next) {
|
||||
/*printf("ALSA: at shutdown, removing %s device '%s'\n", dev->iscapture ? "capture" : "output", dev->name);*/
|
||||
next = dev->next;
|
||||
SDL_free(dev->name);
|
||||
SDL_free(dev);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
ALSA_DetectDevices(void)
|
||||
{
|
||||
void **hints = NULL;
|
||||
int i;
|
||||
|
||||
/* !!! FIXME: use udev instead. */
|
||||
/* We won't deal with disconnects and hotplugs without udev, but at least
|
||||
you'll get a reasonable device list at startup. */
|
||||
#if 1 /*!SDL_USE_LIBUDEV */
|
||||
if (ALSA_snd_device_name_hint(-1, "pcm", &hints) == -1) {
|
||||
/* Start the device detection thread here, wait for an initial iteration to complete. */
|
||||
SDL_sem *semaphore = SDL_CreateSemaphore(0);
|
||||
if (!semaphore) {
|
||||
return; /* oh well. */
|
||||
}
|
||||
|
||||
for (i = 0; hints[i]; i++) {
|
||||
char *name = ALSA_snd_device_name_get_hint(hints[i], "NAME");
|
||||
char *desc = ALSA_snd_device_name_get_hint(hints[i], "DESC");
|
||||
char *ioid = ALSA_snd_device_name_get_hint(hints[i], "IOID");
|
||||
SDL_AtomicSet(&ALSA_hotplug_shutdown, 0);
|
||||
|
||||
/* only want physical hardware interfaces */
|
||||
if (SDL_strncmp(name, "hw:", 3) == 0) {
|
||||
if ((ioid == NULL) || (SDL_strcmp(ioid, "Output") == 0)) {
|
||||
add_device(SDL_FALSE, name, desc);
|
||||
}
|
||||
|
||||
if ((ioid == NULL) || (SDL_strcmp(ioid, "Input") == 0)) {
|
||||
add_device(SDL_TRUE, name, desc);
|
||||
}
|
||||
}
|
||||
|
||||
free(name);
|
||||
free(desc);
|
||||
free(ioid);
|
||||
ALSA_hotplug_thread = SDL_CreateThread(ALSA_HotplugThread, "SDLHotplugALSA", semaphore);
|
||||
if (ALSA_hotplug_thread) {
|
||||
SDL_SemWait(semaphore); /* wait for the first iteration to finish. */
|
||||
}
|
||||
|
||||
ALSA_snd_device_name_free_hint(hints);
|
||||
#else
|
||||
#error Fill in udev support here.
|
||||
#endif
|
||||
SDL_DestroySemaphore(semaphore);
|
||||
}
|
||||
|
||||
static void
|
||||
ALSA_FreeDeviceHandle(void *handle)
|
||||
ALSA_Deinitialize(void)
|
||||
{
|
||||
#if 1 /*!SDL_USE_LIBUDEV*/
|
||||
SDL_free(handle);
|
||||
#else
|
||||
#error Fill in udev support here.
|
||||
#endif
|
||||
}
|
||||
if (ALSA_hotplug_thread != NULL) {
|
||||
SDL_AtomicSet(&ALSA_hotplug_shutdown, 1);
|
||||
SDL_WaitThread(ALSA_hotplug_thread, NULL);
|
||||
ALSA_hotplug_thread = NULL;
|
||||
}
|
||||
|
||||
UnloadALSALibrary();
|
||||
}
|
||||
|
||||
static int
|
||||
ALSA_Init(SDL_AudioDriverImpl * impl)
|
||||
|
|
@ -762,7 +866,6 @@ ALSA_Init(SDL_AudioDriverImpl * impl)
|
|||
impl->PlayDevice = ALSA_PlayDevice;
|
||||
impl->CloseDevice = ALSA_CloseDevice;
|
||||
impl->Deinitialize = ALSA_Deinitialize;
|
||||
impl->FreeDeviceHandle = ALSA_FreeDeviceHandle;
|
||||
|
||||
return 1; /* this audio target is available. */
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue