#include "db.h"
#include "flags.h"
+#include "mixer.h"
#include "timebase.h"
using namespace bmusb;
new_input_mapping.buses.push_back(input);
set_input_mapping(new_input_mapping);
- // Look for ALSA cards.
- available_alsa_cards = ALSAInput::enumerate_devices();
+ alsa_pool.init();
r128.init(2, OUTPUT_FREQUENCY);
r128.integr_start();
peak_resampler.setup(OUTPUT_FREQUENCY, OUTPUT_FREQUENCY * 4, /*num_channels=*/2, /*hlen=*/16, /*frel=*/1.0);
}
-AudioMixer::~AudioMixer()
-{
- for (unsigned card_index = 0; card_index < available_alsa_cards.size(); ++card_index) {
- const AudioDevice &device = alsa_inputs[card_index];
- if (device.alsa_device != nullptr) {
- device.alsa_device->stop_capture_thread();
- }
- }
-}
-
-
void AudioMixer::reset_resampler(DeviceSpec device_spec)
{
lock_guard<timed_mutex> lock(audio_mutex);
device->next_local_pts = 0;
}
-void AudioMixer::reset_alsa_mutex_held(DeviceSpec device_spec)
-{
- assert(device_spec.type == InputSourceType::ALSA_INPUT);
- unsigned card_index = device_spec.index;
- AudioDevice *device = find_audio_device(device_spec);
-
- if (device->alsa_device != nullptr) {
- device->alsa_device->stop_capture_thread();
- }
- if (device->interesting_channels.empty()) {
- device->alsa_device.reset();
- } else {
- const ALSAInput::Device &alsa_dev = available_alsa_cards[card_index];
- device->alsa_device.reset(new ALSAInput(alsa_dev.address.c_str(), OUTPUT_FREQUENCY, alsa_dev.num_channels, bind(&AudioMixer::add_audio, this, device_spec, _1, _2, _3, _4)));
- device->capture_frequency = device->alsa_device->get_sample_rate();
- device->alsa_device->start_capture_thread();
- }
-}
-
bool AudioMixer::add_audio(DeviceSpec device_spec, const uint8_t *data, unsigned num_samples, AudioFormat audio_format, int64_t frame_length)
{
AudioDevice *device = find_audio_device(device_spec);
return true;
}
+bool AudioMixer::silence_card(DeviceSpec device_spec, bool silence)
+{
+ AudioDevice *device = find_audio_device(device_spec);
+
+ unique_lock<timed_mutex> lock(audio_mutex, defer_lock);
+ if (!lock.try_lock_for(chrono::milliseconds(10))) {
+ return false;
+ }
+
+ if (device->silenced && !silence) {
+ reset_resampler_mutex_held(device_spec);
+ }
+ device->silenced = silence;
+ return true;
+}
+
AudioMixer::AudioDevice *AudioMixer::find_audio_device(DeviceSpec device)
{
switch (device.type) {
}
}
+vector<DeviceSpec> AudioMixer::get_active_devices() const
+{
+ vector<DeviceSpec> ret;
+ for (unsigned card_index = 0; card_index < MAX_VIDEO_CARDS; ++card_index) {
+ const DeviceSpec device_spec{InputSourceType::CAPTURE_CARD, card_index};
+ if (!find_audio_device(device_spec)->interesting_channels.empty()) {
+ ret.push_back(device_spec);
+ }
+ }
+ for (unsigned card_index = 0; card_index < MAX_ALSA_CARDS; ++card_index) {
+ const DeviceSpec device_spec{InputSourceType::ALSA_INPUT, card_index};
+ if (!find_audio_device(device_spec)->interesting_channels.empty()) {
+ ret.push_back(device_spec);
+ }
+ }
+ return ret;
+}
+
vector<float> AudioMixer::get_output(double pts, unsigned num_samples, ResamplingQueue::RateAdjustmentPolicy rate_adjustment_policy)
{
map<DeviceSpec, vector<float>> samples_card;
lock_guard<timed_mutex> lock(audio_mutex);
// Pick out all the interesting channels from all the cards.
- // TODO: If the card has been hotswapped, the number of channels
- // might have changed; if so, we need to do some sort of remapping
- // to silence.
- for (const auto &spec_and_info : get_devices_mutex_held()) {
- const DeviceSpec &device_spec = spec_and_info.first;
+ for (const DeviceSpec &device_spec : get_active_devices()) {
AudioDevice *device = find_audio_device(device_spec);
- if (!device->interesting_channels.empty()) {
- samples_card[device_spec].resize(num_samples * device->interesting_channels.size());
+ samples_card[device_spec].resize(num_samples * device->interesting_channels.size());
+ if (device->silenced) {
+ memset(&samples_card[device_spec][0], 0, samples_card[device_spec].size() * sizeof(float));
+ } else {
device->resampling_queue->get_output_samples(
pts,
&samples_card[device_spec][0],
correlation.get_correlation());
}
-map<DeviceSpec, DeviceInfo> AudioMixer::get_devices() const
+map<DeviceSpec, DeviceInfo> AudioMixer::get_devices()
{
lock_guard<timed_mutex> lock(audio_mutex);
- return get_devices_mutex_held();
-}
-map<DeviceSpec, DeviceInfo> AudioMixer::get_devices_mutex_held() const
-{
map<DeviceSpec, DeviceInfo> devices;
for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
const DeviceSpec spec{ InputSourceType::CAPTURE_CARD, card_index };
const AudioDevice *device = &video_cards[card_index];
DeviceInfo info;
info.name = device->name;
- info.num_channels = 8; // FIXME: This is wrong for fake cards.
+ info.num_channels = 8;
devices.insert(make_pair(spec, info));
}
- for (unsigned card_index = 0; card_index < available_alsa_cards.size(); ++card_index) {
+ vector<ALSAPool::Device> available_alsa_devices = alsa_pool.get_devices();
+ for (unsigned card_index = 0; card_index < available_alsa_devices.size(); ++card_index) {
const DeviceSpec spec{ InputSourceType::ALSA_INPUT, card_index };
- const ALSAInput::Device &device = available_alsa_cards[card_index];
+ const ALSAPool::Device &device = available_alsa_devices[card_index];
DeviceInfo info;
info.name = device.name + " (" + device.info + ")";
info.num_channels = device.num_channels;
}
// Reset resamplers for all cards that don't have the exact same state as before.
- for (const auto &spec_and_info : get_devices_mutex_held()) {
- const DeviceSpec &device_spec = spec_and_info.first;
+ for (unsigned card_index = 0; card_index < MAX_VIDEO_CARDS; ++card_index) {
+ const DeviceSpec device_spec{InputSourceType::CAPTURE_CARD, card_index};
AudioDevice *device = find_audio_device(device_spec);
if (device->interesting_channels != interesting_channels[device_spec]) {
device->interesting_channels = interesting_channels[device_spec];
- if (device_spec.type == InputSourceType::ALSA_INPUT) {
- reset_alsa_mutex_held(device_spec);
- }
+ reset_resampler_mutex_held(device_spec);
+ }
+ }
+ for (unsigned card_index = 0; card_index < MAX_ALSA_CARDS; ++card_index) {
+ const DeviceSpec device_spec{InputSourceType::ALSA_INPUT, card_index};
+ AudioDevice *device = find_audio_device(device_spec);
+ if (interesting_channels[device_spec].empty()) {
+ alsa_pool.release_device(card_index);
+ } else {
+ alsa_pool.hold_device(card_index);
+ }
+ if (device->interesting_channels != interesting_channels[device_spec]) {
+ device->interesting_channels = interesting_channels[device_spec];
+ alsa_pool.reset_device(device_spec.index);
reset_resampler_mutex_held(device_spec);
}
}
projects / nageru / blobdiff