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audio: Added SDL_EVENT_AUDIO_DEVICE_FORMAT_CHANGED

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This fires if an opened device changes formats (which it can on Windows,
if the user changes this in the system control panel, and WASAPI can
report), or if a default device migrates to new hardware and the format
doesn't match.

This will fire for all logical devices on a physical device (and if it's
a format change and not a default device change, it'll fire for the
physical device too, but that's honestly not that useful and might change).

Fixes #8267.
This commit is contained in:
Ryan C. Gordon
2023-09-19 17:54:44 -04:00
parent c7e6d7a1f7
commit 23206b9e3f
5 changed files with 48 additions and 13 deletions
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9
include/SDL3/SDL_events.h
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@@ -185,8 +185,9 @@ typedef enum
SDL_EVENT_DROP_POSITION, /**< Position while moving over the window */
/* Audio hotplug events */
SDL_EVENT_AUDIO_DEVICE_ADDED = 0x1100, /**< A new audio device is available */
SDL_EVENT_AUDIO_DEVICE_REMOVED, /**< An audio device has been removed. */
SDL_EVENT_AUDIO_DEVICE_ADDED = 0x1100, /**< A new audio device is available */
SDL_EVENT_AUDIO_DEVICE_REMOVED, /**< An audio device has been removed. */
SDL_EVENT_AUDIO_DEVICE_FORMAT_CHANGED, /**< An audio device's format has been changed by the system. */
/* Sensor events */
SDL_EVENT_SENSOR_UPDATE = 0x1200, /**< A sensor was updated */
@@ -491,9 +492,9 @@ typedef struct SDL_GamepadSensorEvent
*/
typedef struct SDL_AudioDeviceEvent
{
Uint32 type; /**< ::SDL_EVENT_AUDIO_DEVICE_ADDED, or ::SDL_EVENT_AUDIO_DEVICE_REMOVED */
Uint32 type; /**< ::SDL_EVENT_AUDIO_DEVICE_ADDED, or ::SDL_EVENT_AUDIO_DEVICE_REMOVED, or ::SDL_EVENT_AUDIO_DEVICE_FORMAT_CHANGED */
Uint64 timestamp; /**< In nanoseconds, populated using SDL_GetTicksNS() */
SDL_AudioDeviceID which; /**< SDL_AudioDeviceID for the device being added or removed */
SDL_AudioDeviceID which; /**< SDL_AudioDeviceID for the device being added or removed or changing */
Uint8 iscapture; /**< zero if an output device, non-zero if a capture device. */
Uint8 padding1;
Uint8 padding2;

45
src/audio/SDL_audio.c
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@@ -1797,6 +1797,7 @@ void SDL_DefaultAudioDeviceChanged(SDL_AudioDevice *new_default_device)
SDL_AudioSpec spec;
SDL_bool needs_migration = SDL_FALSE;
SDL_zero(spec);
for (SDL_LogicalAudioDevice *logdev = current_default_device->logical_devices; logdev != NULL; logdev = logdev->next) {
if (logdev->opened_as_default) {
needs_migration = SDL_TRUE;
@@ -1824,6 +1825,8 @@ void SDL_DefaultAudioDeviceChanged(SDL_AudioDevice *new_default_device)
}
if (needs_migration) {
const SDL_bool spec_changed = !AUDIO_SPECS_EQUAL(current_default_device->spec, new_default_device->spec);
const SDL_bool post_fmt_event = (spec_changed && SDL_EventEnabled(SDL_EVENT_AUDIO_DEVICE_FORMAT_CHANGED)) ? SDL_TRUE : SDL_FALSE;
SDL_LogicalAudioDevice *next = NULL;
for (SDL_LogicalAudioDevice *logdev = current_default_device->logical_devices; logdev != NULL; logdev = next) {
next = logdev->next;
@@ -1852,6 +1855,17 @@ void SDL_DefaultAudioDeviceChanged(SDL_AudioDevice *new_default_device)
logdev->prev = NULL;
logdev->next = new_default_device->logical_devices;
new_default_device->logical_devices = logdev;
// Post an event for each logical device we moved.
if (post_fmt_event) {
SDL_Event event;
SDL_zero(event);
event.type = SDL_EVENT_AUDIO_DEVICE_FORMAT_CHANGED;
event.common.timestamp = 0;
event.adevice.iscapture = iscapture ? 1 : 0;
event.adevice.which = logdev->instance_id;
SDL_PushEvent(&event);
}
}
current_default_device->simple_copy = AudioDeviceCanUseSimpleCopy(current_default_device);
@@ -1883,13 +1897,15 @@ int SDL_AudioDeviceFormatChangedAlreadyLocked(SDL_AudioDevice *device, const SDL
const int orig_work_buffer_size = device->work_buffer_size;
const SDL_bool iscapture = device->iscapture;
if ((device->spec.format != newspec->format) || (device->spec.channels != newspec->channels) || (device->spec.freq != newspec->freq)) {
SDL_memcpy(&device->spec, newspec, sizeof (*newspec));
for (SDL_LogicalAudioDevice *logdev = device->logical_devices; !kill_device && (logdev != NULL); logdev = logdev->next) {
for (SDL_AudioStream *stream = logdev->bound_streams; !kill_device && (stream != NULL); stream = stream->next_binding) {
if (SDL_SetAudioStreamFormat(stream, iscapture ? &device->spec : NULL, iscapture ? NULL : &device->spec) == -1) {
kill_device = SDL_TRUE;
}
if (AUDIO_SPECS_EQUAL(device->spec, *newspec)) {
return 0; // we're already in that format.
}
SDL_memcpy(&device->spec, newspec, sizeof (*newspec));
for (SDL_LogicalAudioDevice *logdev = device->logical_devices; !kill_device && (logdev != NULL); logdev = logdev->next) {
for (SDL_AudioStream *stream = logdev->bound_streams; !kill_device && (stream != NULL); stream = stream->next_binding) {
if (SDL_SetAudioStreamFormat(stream, iscapture ? &device->spec : NULL, iscapture ? NULL : &device->spec) == -1) {
kill_device = SDL_TRUE;
}
}
}
@@ -1923,6 +1939,21 @@ int SDL_AudioDeviceFormatChangedAlreadyLocked(SDL_AudioDevice *device, const SDL
}
}
// Post an event for the physical device, and each logical device on this physical device.
if (!kill_device && SDL_EventEnabled(SDL_EVENT_AUDIO_DEVICE_FORMAT_CHANGED)) {
SDL_Event event;
SDL_zero(event);
event.type = SDL_EVENT_AUDIO_DEVICE_FORMAT_CHANGED;
event.common.timestamp = 0;
event.adevice.iscapture = device->iscapture ? 1 : 0;
event.adevice.which = device->instance_id;
SDL_PushEvent(&event);
for (SDL_LogicalAudioDevice *logdev = device->logical_devices; logdev != NULL; logdev = logdev->next) {
event.adevice.which = logdev->instance_id;
SDL_PushEvent(&event);
}
}
return kill_device ? -1 : 0;
}

2
src/audio/SDL_audiocvt.c
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@@ -29,8 +29,6 @@
#define SDL_INT_MAX ((int)(~0u>>1))
#endif
#define AUDIO_SPECS_EQUAL(x, y) (((x).format == (y).format) && ((x).channels == (y).channels) && ((x).freq == (y).freq))
/*
* CHANNEL LAYOUTS AS SDL EXPECTS THEM:
*

2
src/audio/SDL_sysaudio.h
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@@ -56,6 +56,8 @@ extern void (*SDL_Convert_F32_to_S32)(Sint32 *dst, const float *src, int num_sam
#define DEFAULT_AUDIO_CAPTURE_CHANNELS 1
#define DEFAULT_AUDIO_CAPTURE_FREQUENCY 44100
#define AUDIO_SPECS_EQUAL(x, y) (((x).format == (y).format) && ((x).channels == (y).channels) && ((x).freq == (y).freq))
typedef struct SDL_AudioDevice SDL_AudioDevice;
typedef struct SDL_LogicalAudioDevice SDL_LogicalAudioDevice;

3
src/events/SDL_events.c
View File

@@ -440,6 +440,9 @@ static void SDL_LogEvent(const SDL_Event *event)
SDL_EVENT_CASE(SDL_EVENT_AUDIO_DEVICE_REMOVED)
PRINT_AUDIODEV_EVENT(event);
break;
SDL_EVENT_CASE(SDL_EVENT_AUDIO_DEVICE_FORMAT_CHANGED)
PRINT_AUDIODEV_EVENT(event);
break;
#undef PRINT_AUDIODEV_EVENT
SDL_EVENT_CASE(SDL_EVENT_SENSOR_UPDATE)