f716de1331
If the default device changes, set the reconnect interval to 200 milliseconds so it pretty much immediately tries to reinitialize the audio with the newly selected default device. Otherwise, use 2000 millisecond intervals, and assume disconnection. Also, reduced FFmpeg logging to just regular FFmpeg information rather than everything FFmpeg logs.
653 lines
16 KiB
C
653 lines
16 KiB
C
#include <AudioUnit/AudioUnit.h>
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#include <CoreFoundation/CFString.h>
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#include <CoreAudio/CoreAudio.h>
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#include <unistd.h>
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#include <errno.h>
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#include <obs.h>
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#include <util/threading.h>
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#include <util/c99defs.h>
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#include <util/dstr.h>
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#include "mac-helpers.h"
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#define PROPERTY_DEFAULT_DEVICE kAudioHardwarePropertyDefaultInputDevice
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#define PROPERTY_FORMATS kAudioStreamPropertyAvailablePhysicalFormats
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#define SCOPE_OUTPUT kAudioUnitScope_Output
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#define SCOPE_INPUT kAudioUnitScope_Input
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#define SCOPE_GLOBAL kAudioUnitScope_Global
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#define BUS_OUTPUT 0
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#define BUS_INPUT 1
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#define MAX_DEVICES 20
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#define set_property AudioUnitSetProperty
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#define get_property AudioUnitGetProperty
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struct coreaudio_data {
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char *device_name;
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char *device_uid;
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AudioUnit unit;
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AudioDeviceID device_id;
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AudioBufferList *buf_list;
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bool au_initialized;
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bool active;
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bool default_device;
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uint32_t sample_rate;
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enum audio_format format;
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enum speaker_layout speakers;
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pthread_t reconnect_thread;
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event_t exit_event;
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volatile bool reconnecting;
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unsigned long retry_time;
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obs_source_t source;
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};
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static bool find_device_id_by_uid(struct coreaudio_data *ca)
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{
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OSStatus stat;
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UInt32 size = sizeof(AudioDeviceID);
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CFStringRef cf_uid = CFStringCreateWithCString(NULL, ca->device_uid,
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kCFStringEncodingUTF8);
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CFStringRef qual = NULL;
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UInt32 qual_size = 0;
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bool success;
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AudioObjectPropertyAddress addr = {
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.mScope = kAudioObjectPropertyScopeGlobal,
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.mElement = kAudioObjectPropertyElementMaster
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};
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ca->default_device = (strcmp(ca->device_uid, "Default") == 0);
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if (ca->default_device) {
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addr.mSelector = PROPERTY_DEFAULT_DEVICE;
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} else {
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addr.mSelector = kAudioHardwarePropertyTranslateUIDToDevice;
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qual = cf_uid;
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qual_size = sizeof(CFStringRef);
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}
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stat = AudioObjectGetPropertyData(kAudioObjectSystemObject, &addr,
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qual_size, &qual, &size, &ca->device_id);
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success = (stat == noErr);
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CFRelease(cf_uid);
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return success;
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}
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static inline void ca_warn(struct coreaudio_data *ca, const char *func,
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const char *format, ...)
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{
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va_list args;
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struct dstr str = {0};
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va_start(args, format);
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dstr_printf(&str, "[%s]:[device '%s'] ", func, ca->device_name);
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dstr_vcatf(&str, format, args);
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blog(LOG_WARNING, "%s", str.array);
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dstr_free(&str);
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va_end(args);
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}
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static inline bool ca_success(OSStatus stat, struct coreaudio_data *ca,
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const char *func, const char *action)
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{
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if (stat != noErr) {
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blog(LOG_WARNING, "[%s]:[device '%s'] %s failed: %d",
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func, ca->device_name, action, (int)stat);
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return false;
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}
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return true;
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}
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enum coreaudio_io_type {
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IO_TYPE_INPUT,
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IO_TYPE_OUTPUT,
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};
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static inline bool enable_io(struct coreaudio_data *ca,
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enum coreaudio_io_type type, bool enable)
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{
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UInt32 enable_int = enable;
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return set_property(ca->unit, kAudioOutputUnitProperty_EnableIO,
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(type == IO_TYPE_INPUT) ? SCOPE_INPUT : SCOPE_OUTPUT,
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(type == IO_TYPE_INPUT) ? BUS_INPUT : BUS_OUTPUT,
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&enable_int, sizeof(enable_int));
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}
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static inline enum audio_format convert_ca_format(UInt32 format_flags,
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UInt32 bits)
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{
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bool planar = (format_flags & kAudioFormatFlagIsNonInterleaved) != 0;
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if (format_flags & kAudioFormatFlagIsFloat)
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return planar ? AUDIO_FORMAT_FLOAT_PLANAR : AUDIO_FORMAT_FLOAT;
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if (!(format_flags & kAudioFormatFlagIsSignedInteger) && bits == 8)
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return planar ? AUDIO_FORMAT_U8BIT_PLANAR : AUDIO_FORMAT_U8BIT;
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/* not float? not signed int? no clue, fail */
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if ((format_flags & kAudioFormatFlagIsSignedInteger) == 0)
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return AUDIO_FORMAT_UNKNOWN;
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if (bits == 16)
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return planar ? AUDIO_FORMAT_16BIT_PLANAR : AUDIO_FORMAT_16BIT;
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else if (bits == 32)
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return planar ? AUDIO_FORMAT_32BIT_PLANAR : AUDIO_FORMAT_32BIT;
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return AUDIO_FORMAT_UNKNOWN;
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}
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static inline enum speaker_layout convert_ca_speaker_layout(UInt32 channels)
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{
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/* directly map channel count to enum values */
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if (channels >= 1 && channels <= 8 && channels != 7)
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return (enum speaker_layout)channels;
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return SPEAKERS_UNKNOWN;
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}
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static bool coreaudio_init_format(struct coreaudio_data *ca)
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{
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AudioStreamBasicDescription desc;
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OSStatus stat;
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UInt32 size = sizeof(desc);
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stat = get_property(ca->unit, kAudioUnitProperty_StreamFormat,
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SCOPE_INPUT, BUS_INPUT, &desc, &size);
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if (!ca_success(stat, ca, "coreaudio_init_format", "get input format"))
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return false;
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stat = set_property(ca->unit, kAudioUnitProperty_StreamFormat,
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SCOPE_OUTPUT, BUS_INPUT, &desc, size);
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if (!ca_success(stat, ca, "coreaudio_init_format", "set output format"))
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return false;
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if (desc.mFormatID != kAudioFormatLinearPCM) {
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ca_warn(ca, "coreaudio_init_format", "format is not PCM");
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return false;
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}
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ca->format = convert_ca_format(desc.mFormatFlags, desc.mBitsPerChannel);
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if (ca->format == AUDIO_FORMAT_UNKNOWN) {
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ca_warn(ca, "coreaudio_init_format", "unknown format flags: "
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"%u, bits: %u",
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(unsigned int)desc.mFormatFlags,
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(unsigned int)desc.mBitsPerChannel);
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return false;
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}
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ca->sample_rate = (uint32_t)desc.mSampleRate;
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ca->speakers = convert_ca_speaker_layout(desc.mChannelsPerFrame);
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if (ca->speakers == SPEAKERS_UNKNOWN) {
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ca_warn(ca, "coreaudio_init_format", "unknown speaker layout: "
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"%u channels",
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(unsigned int)desc.mChannelsPerFrame);
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return false;
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}
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return true;
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}
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static bool coreaudio_init_buffer(struct coreaudio_data *ca)
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{
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UInt32 buf_size = 0;
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UInt32 size = 0;
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UInt32 frames = 0;
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OSStatus stat;
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AudioObjectPropertyAddress addr = {
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kAudioDevicePropertyStreamConfiguration,
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kAudioDevicePropertyScopeInput,
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kAudioObjectPropertyElementMaster
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};
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stat = AudioObjectGetPropertyDataSize(ca->device_id, &addr, 0, NULL,
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&buf_size);
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if (!ca_success(stat, ca, "coreaudio_init_buffer", "get list size"))
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return false;
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size = sizeof(frames);
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stat = get_property(ca->unit, kAudioDevicePropertyBufferFrameSize,
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SCOPE_GLOBAL, 0, &frames, &size);
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if (!ca_success(stat, ca, "coreaudio_init_buffer", "get frame size"))
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return false;
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/* ---------------------- */
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ca->buf_list = bmalloc(buf_size);
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stat = AudioObjectGetPropertyData(ca->device_id, &addr, 0, NULL,
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&buf_size, ca->buf_list);
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if (!ca_success(stat, ca, "coreaudio_init_buffer", "allocate")) {
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bfree(ca->buf_list);
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ca->buf_list = NULL;
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return false;
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}
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for (UInt32 i = 0; i < ca->buf_list->mNumberBuffers; i++) {
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size = ca->buf_list->mBuffers[i].mDataByteSize;
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ca->buf_list->mBuffers[i].mData = bmalloc(size);
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}
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return true;
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}
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static void buf_list_free(AudioBufferList *buf_list)
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{
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if (buf_list) {
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for (UInt32 i = 0; i < buf_list->mNumberBuffers; i++)
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bfree(buf_list->mBuffers[i].mData);
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bfree(buf_list);
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}
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}
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static OSStatus input_callback(
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void *data,
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AudioUnitRenderActionFlags *action_flags,
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const AudioTimeStamp *ts_data,
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UInt32 bus_num,
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UInt32 frames,
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AudioBufferList *ignored_buffers)
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{
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struct coreaudio_data *ca = data;
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OSStatus stat;
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struct source_audio audio;
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stat = AudioUnitRender(ca->unit, action_flags, ts_data, bus_num, frames,
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ca->buf_list);
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if (!ca_success(stat, ca, "input_callback", "audio retrieval"))
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return noErr;
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for (UInt32 i = 0; i < ca->buf_list->mNumberBuffers; i++)
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audio.data[i] = ca->buf_list->mBuffers[i].mData;
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audio.frames = frames;
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audio.speakers = ca->speakers;
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audio.format = ca->format;
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audio.samples_per_sec = ca->sample_rate;
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audio.timestamp = ts_data->mHostTime;
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obs_source_output_audio(ca->source, &audio);
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UNUSED_PARAMETER(ignored_buffers);
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return noErr;
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}
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static void coreaudio_stop(struct coreaudio_data *ca);
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static bool coreaudio_init(struct coreaudio_data *ca);
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static void coreaudio_uninit(struct coreaudio_data *ca);
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static void *reconnect_thread(void *param)
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{
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struct coreaudio_data *ca = param;
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ca->reconnecting = true;
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while (event_timedwait(ca->exit_event, ca->retry_time) == ETIMEDOUT) {
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if (coreaudio_init(ca))
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break;
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}
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blog(LOG_DEBUG, "coreaudio: exit the reconnect thread");
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ca->reconnecting = false;
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return NULL;
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}
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static void coreaudio_begin_reconnect(struct coreaudio_data *ca)
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{
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int ret;
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if (ca->reconnecting)
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return;
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ret = pthread_create(&ca->reconnect_thread, NULL, reconnect_thread, ca);
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if (ret != 0)
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blog(LOG_WARNING, "[coreaudio_begin_reconnect] failed to "
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"create thread, error code: %d", ret);
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}
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static OSStatus notification_callback(
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AudioObjectID id,
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UInt32 num_addresses,
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const AudioObjectPropertyAddress addresses[],
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void *data)
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{
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struct coreaudio_data *ca = data;
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coreaudio_stop(ca);
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coreaudio_uninit(ca);
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if (addresses[0].mSelector == PROPERTY_DEFAULT_DEVICE)
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ca->retry_time = 300;
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else
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ca->retry_time = 2000;
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blog(LOG_INFO, "coreaudio: device '%s' disconnected or changed. "
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"attempting to reconnect", ca->device_name);
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coreaudio_begin_reconnect(ca);
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UNUSED_PARAMETER(id);
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UNUSED_PARAMETER(num_addresses);
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return noErr;
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}
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static OSStatus add_listener(struct coreaudio_data *ca, UInt32 property)
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{
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AudioObjectPropertyAddress addr = {
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property,
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kAudioObjectPropertyScopeGlobal,
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kAudioObjectPropertyElementMaster
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};
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return AudioObjectAddPropertyListener(ca->device_id, &addr,
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notification_callback, ca);
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}
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static bool coreaudio_init_hooks(struct coreaudio_data *ca)
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{
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OSStatus stat;
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AURenderCallbackStruct callback_info = {
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.inputProc = input_callback,
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.inputProcRefCon = ca
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};
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stat = add_listener(ca, kAudioDevicePropertyDeviceIsAlive);
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if (!ca_success(stat, ca, "coreaudio_init_hooks",
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"set disconnect callback"))
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return false;
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stat = add_listener(ca, PROPERTY_FORMATS);
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if (!ca_success(stat, ca, "coreaudio_init_hooks",
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"set format change callback"))
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return false;
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if (ca->default_device) {
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AudioObjectPropertyAddress addr = {
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PROPERTY_DEFAULT_DEVICE,
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kAudioObjectPropertyScopeGlobal,
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kAudioObjectPropertyElementMaster
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};
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stat = AudioObjectAddPropertyListener(kAudioObjectSystemObject,
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&addr, notification_callback, ca);
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if (!ca_success(stat, ca, "coreaudio_init_hooks",
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"set device change callback"))
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return false;
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}
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stat = set_property(ca->unit, kAudioOutputUnitProperty_SetInputCallback,
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SCOPE_GLOBAL, 0, &callback_info, sizeof(callback_info));
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if (!ca_success(stat, ca, "coreaudio_init_hooks", "set input callback"))
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return false;
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return true;
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}
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static void coreaudio_remove_hooks(struct coreaudio_data *ca)
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{
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AURenderCallbackStruct callback_info = {
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.inputProc = NULL,
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.inputProcRefCon = NULL
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};
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AudioObjectPropertyAddress addr = {
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kAudioDevicePropertyDeviceIsAlive,
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kAudioObjectPropertyScopeGlobal,
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kAudioObjectPropertyElementMaster
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};
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AudioObjectRemovePropertyListener(ca->device_id, &addr,
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notification_callback, ca);
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addr.mSelector = PROPERTY_FORMATS;
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AudioObjectRemovePropertyListener(ca->device_id, &addr,
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notification_callback, ca);
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if (ca->default_device) {
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addr.mSelector = PROPERTY_DEFAULT_DEVICE;
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AudioObjectRemovePropertyListener(kAudioObjectSystemObject,
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&addr, notification_callback, ca);
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}
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set_property(ca->unit, kAudioOutputUnitProperty_SetInputCallback,
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SCOPE_GLOBAL, 0, &callback_info, sizeof(callback_info));
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}
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static bool coreaudio_get_device_name(struct coreaudio_data *ca)
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{
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CFStringRef cf_name = NULL;
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UInt32 size = sizeof(CFStringRef);
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char name[1024];
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const AudioObjectPropertyAddress addr = {
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kAudioDevicePropertyDeviceNameCFString,
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kAudioObjectPropertyScopeInput,
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kAudioObjectPropertyElementMaster
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};
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OSStatus stat = AudioObjectGetPropertyData(ca->device_id, &addr,
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0, NULL, &size, &cf_name);
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if (stat != noErr) {
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blog(LOG_WARNING, "[coreaudio_get_device_name] failed to "
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"get name: %d", (int)stat);
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return false;
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}
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if (!cf_to_cstr(cf_name, name, 1024)) {
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blog(LOG_WARNING, "[coreaudio_get_device_name] failed to "
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"convert name to cstr for some reason");
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return false;
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}
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bfree(ca->device_name);
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ca->device_name = bstrdup(name);
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CFRelease(cf_name);
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return true;
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}
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static bool coreaudio_start(struct coreaudio_data *ca)
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{
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OSStatus stat;
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if (ca->active)
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return true;
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stat = AudioOutputUnitStart(ca->unit);
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return ca_success(stat, ca, "coreaudio_start", "start audio");
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}
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static void coreaudio_stop(struct coreaudio_data *ca)
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{
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OSStatus stat;
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if (!ca->active)
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return;
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ca->active = false;
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stat = AudioOutputUnitStop(ca->unit);
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ca_success(stat, ca, "coreaudio_stop", "stop audio");
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}
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static bool coreaudio_init_unit(struct coreaudio_data *ca)
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{
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AudioComponentDescription desc = {
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.componentType = kAudioUnitType_Output,
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.componentSubType = kAudioUnitSubType_HALOutput
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};
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AudioComponent component = AudioComponentFindNext(NULL, &desc);
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if (!component) {
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ca_warn(ca, "coreaudio_init_unit", "find component failed");
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return false;
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}
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OSStatus stat = AudioComponentInstanceNew(component, &ca->unit);
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if (!ca_success(stat, ca, "coreaudio_init_unit", "instance unit"))
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return false;
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ca->au_initialized = true;
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return true;
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}
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static bool coreaudio_init(struct coreaudio_data *ca)
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{
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OSStatus stat;
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if (ca->au_initialized)
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return true;
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if (!find_device_id_by_uid(ca))
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return false;
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if (!coreaudio_get_device_name(ca))
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return false;
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if (!coreaudio_init_unit(ca))
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return false;
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stat = enable_io(ca, IO_TYPE_INPUT, true);
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if (!ca_success(stat, ca, "coreaudio_init", "enable input io"))
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goto fail;
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stat = enable_io(ca, IO_TYPE_OUTPUT, false);
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if (!ca_success(stat, ca, "coreaudio_init", "disable output io"))
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goto fail;
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stat = set_property(ca->unit, kAudioOutputUnitProperty_CurrentDevice,
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SCOPE_GLOBAL, 0, &ca->device_id, sizeof(ca->device_id));
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if (!ca_success(stat, ca, "coreaudio_init", "set current device"))
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goto fail;
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if (!coreaudio_init_format(ca))
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goto fail;
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if (!coreaudio_init_buffer(ca))
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goto fail;
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if (!coreaudio_init_hooks(ca))
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goto fail;
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stat = AudioUnitInitialize(ca->unit);
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if (!ca_success(stat, ca, "coreaudio_initialize", "initialize"))
|
|
goto fail;
|
|
|
|
if (!coreaudio_start(ca))
|
|
goto fail;
|
|
|
|
blog(LOG_INFO, "coreaudio: device '%s' initialized", ca->device_name);
|
|
return ca->au_initialized;
|
|
|
|
fail:
|
|
coreaudio_uninit(ca);
|
|
return false;
|
|
}
|
|
|
|
static void coreaudio_try_init(struct coreaudio_data *ca)
|
|
{
|
|
if (!coreaudio_init(ca)) {
|
|
blog(LOG_INFO, "coreaudio: failed to find device "
|
|
"uid: %s, waiting for connection",
|
|
ca->device_uid);
|
|
|
|
ca->retry_time = 2000;
|
|
coreaudio_begin_reconnect(ca);
|
|
}
|
|
}
|
|
|
|
static void coreaudio_uninit(struct coreaudio_data *ca)
|
|
{
|
|
if (!ca->au_initialized)
|
|
return;
|
|
|
|
if (ca->unit) {
|
|
coreaudio_stop(ca);
|
|
|
|
OSStatus stat = AudioUnitUninitialize(ca->unit);
|
|
ca_success(stat, ca, "coreaudio_uninit", "uninitialize");
|
|
|
|
coreaudio_remove_hooks(ca);
|
|
|
|
stat = AudioComponentInstanceDispose(ca->unit);
|
|
ca_success(stat, ca, "coreaudio_uninit", "dispose");
|
|
|
|
ca->unit = NULL;
|
|
}
|
|
|
|
ca->au_initialized = false;
|
|
|
|
buf_list_free(ca->buf_list);
|
|
ca->buf_list = NULL;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
static const char *coreaudio_getname(const char *locale)
|
|
{
|
|
/* TODO: Locale */
|
|
UNUSED_PARAMETER(locale);
|
|
return "CoreAudio Input";
|
|
}
|
|
|
|
static void coreaudio_destroy(void *data)
|
|
{
|
|
struct coreaudio_data *ca = data;
|
|
|
|
if (ca) {
|
|
if (ca->reconnecting) {
|
|
event_signal(ca->exit_event);
|
|
pthread_join(ca->reconnect_thread, NULL);
|
|
}
|
|
|
|
coreaudio_uninit(ca);
|
|
|
|
if (ca->unit)
|
|
AudioComponentInstanceDispose(ca->unit);
|
|
|
|
event_destroy(ca->exit_event);
|
|
bfree(ca->device_name);
|
|
bfree(ca->device_uid);
|
|
bfree(ca);
|
|
}
|
|
}
|
|
|
|
static void *coreaudio_create(obs_data_t settings, obs_source_t source)
|
|
{
|
|
struct coreaudio_data *ca = bzalloc(sizeof(struct coreaudio_data));
|
|
|
|
obs_data_set_default_string(settings, "device_id", "Default");
|
|
|
|
if (event_init(&ca->exit_event, EVENT_TYPE_MANUAL) != 0) {
|
|
blog(LOG_WARNING, "[coreaudio_create] failed to create "
|
|
"semephore: %d", errno);
|
|
bfree(ca);
|
|
return NULL;
|
|
}
|
|
|
|
ca->device_uid = bstrdup(obs_data_getstring(settings, "device_id"));
|
|
ca->source = source;
|
|
|
|
coreaudio_try_init(ca);
|
|
return ca;
|
|
}
|
|
|
|
struct obs_source_info coreaudio_info = {
|
|
.id = "coreaudio_capture",
|
|
.type = OBS_SOURCE_TYPE_INPUT,
|
|
.output_flags = OBS_SOURCE_AUDIO,
|
|
.getname = coreaudio_getname,
|
|
.create = coreaudio_create,
|
|
.destroy = coreaudio_destroy,
|
|
};
|