// TODO: If these prove to be a bottleneck, they can be SSSE3-optimized
// (usually including multiple channels at a time).
+void convert_fixed16_to_fp32(float *dst, size_t out_channel, size_t out_num_channels,
+ const uint8_t *src, size_t in_channel, size_t in_num_channels,
+ size_t num_samples)
+{
+ assert(in_channel < in_num_channels);
+ assert(out_channel < out_num_channels);
+ src += in_channel * 2;
+ dst += out_channel;
+
+ for (size_t i = 0; i < num_samples; ++i) {
+ int16_t s = le16toh(*(int16_t *)src);
+ *dst = s * (1.0f / 32768.0f);
+
+ src += 2 * in_num_channels;
+ dst += out_num_channels;
+ }
+}
+
void convert_fixed24_to_fp32(float *dst, size_t out_channel, size_t out_num_channels,
const uint8_t *src, size_t in_channel, size_t in_num_channels,
size_t num_samples)
// Generate a very simple, default input mapping.
InputMapping::Bus input;
input.name = "Main";
- input.input_source_type = InputSourceType::CAPTURE_CARD;
- input.input_source_index = 0;
+ input.device.type = InputSourceType::CAPTURE_CARD;
+ input.device.index = 0;
input.source_channel[0] = 0;
input.source_channel[1] = 1;
set_input_mapping(new_input_mapping);
}
-void AudioMixer::reset_card(unsigned card_index)
+void AudioMixer::reset_device(DeviceSpec device_spec)
{
lock_guard<mutex> lock(audio_mutex);
- reset_card_mutex_held(card_index);
+ reset_device_mutex_held(device_spec);
}
-void AudioMixer::reset_card_mutex_held(unsigned card_index)
+void AudioMixer::reset_device_mutex_held(DeviceSpec device_spec)
{
- CaptureCard *card = &cards[card_index];
- if (card->interesting_channels.empty()) {
- card->resampling_queue.reset();
+ AudioDevice *device = find_audio_device(device_spec);
+ if (device->interesting_channels.empty()) {
+ device->resampling_queue.reset();
} else {
- card->resampling_queue.reset(new ResamplingQueue(card_index, OUTPUT_FREQUENCY, OUTPUT_FREQUENCY, card->interesting_channels.size()));
+ // TODO: ResamplingQueue should probably take the full device spec.
+ // (It's only used for console output, though.)
+ device->resampling_queue.reset(new ResamplingQueue(device_spec.index, device->capture_frequency, OUTPUT_FREQUENCY, device->interesting_channels.size()));
}
- card->next_local_pts = 0;
+ device->next_local_pts = 0;
}
-void AudioMixer::add_audio(unsigned card_index, const uint8_t *data, unsigned num_samples, AudioFormat audio_format, int64_t frame_length)
+void AudioMixer::add_audio(DeviceSpec device_spec, const uint8_t *data, unsigned num_samples, AudioFormat audio_format, int64_t frame_length)
{
- lock_guard<mutex> lock(audio_mutex);
- CaptureCard *card = &cards[card_index];
+ AudioDevice *device = find_audio_device(device_spec);
- if (card->resampling_queue == nullptr) {
- // No buses use this card; throw it away.
+ lock_guard<mutex> lock(audio_mutex);
+ if (device->resampling_queue == nullptr) {
+ // No buses use this device; throw it away.
return;
}
- unsigned num_channels = card->interesting_channels.size();
+ unsigned num_channels = device->interesting_channels.size();
assert(num_channels > 0);
- // Convert the audio to stereo fp32.
+ // Convert the audio to fp32.
vector<float> audio;
audio.resize(num_samples * num_channels);
unsigned channel_index = 0;
- for (auto channel_it = card->interesting_channels.cbegin(); channel_it != card->interesting_channels.end(); ++channel_it, ++channel_index) {
+ for (auto channel_it = device->interesting_channels.cbegin(); channel_it != device->interesting_channels.end(); ++channel_it, ++channel_index) {
switch (audio_format.bits_per_sample) {
case 0:
assert(num_samples == 0);
break;
+ case 16:
+ convert_fixed16_to_fp32(&audio[0], channel_index, num_channels, data, *channel_it, audio_format.num_channels, num_samples);
+ break;
case 24:
convert_fixed24_to_fp32(&audio[0], channel_index, num_channels, data, *channel_it, audio_format.num_channels, num_samples);
break;
}
// Now add it.
- int64_t local_pts = card->next_local_pts;
- card->resampling_queue->add_input_samples(local_pts / double(TIMEBASE), audio.data(), num_samples);
- card->next_local_pts = local_pts + frame_length;
+ int64_t local_pts = device->next_local_pts;
+ device->resampling_queue->add_input_samples(local_pts / double(TIMEBASE), audio.data(), num_samples);
+ device->next_local_pts = local_pts + frame_length;
}
-void AudioMixer::add_silence(unsigned card_index, unsigned samples_per_frame, unsigned num_frames, int64_t frame_length)
+void AudioMixer::add_silence(DeviceSpec device_spec, unsigned samples_per_frame, unsigned num_frames, int64_t frame_length)
{
- CaptureCard *card = &cards[card_index];
- lock_guard<mutex> lock(audio_mutex);
+ AudioDevice *device = find_audio_device(device_spec);
- if (card->resampling_queue == nullptr) {
- // No buses use this card; throw it away.
+ lock_guard<mutex> lock(audio_mutex);
+ if (device->resampling_queue == nullptr) {
+ // No buses use this device; throw it away.
return;
}
- unsigned num_channels = card->interesting_channels.size();
+ unsigned num_channels = device->interesting_channels.size();
assert(num_channels > 0);
vector<float> silence(samples_per_frame * num_channels, 0.0f);
for (unsigned i = 0; i < num_frames; ++i) {
- card->resampling_queue->add_input_samples(card->next_local_pts / double(TIMEBASE), silence.data(), samples_per_frame);
+ device->resampling_queue->add_input_samples(device->next_local_pts / double(TIMEBASE), silence.data(), samples_per_frame);
// Note that if the format changed in the meantime, we have
// no way of detecting that; we just have to assume the frame length
// is always the same.
- card->next_local_pts += frame_length;
+ device->next_local_pts += frame_length;
+ }
+}
+
+AudioMixer::AudioDevice *AudioMixer::find_audio_device(DeviceSpec device)
+{
+ switch (device.type) {
+ case InputSourceType::CAPTURE_CARD:
+ return &cards[device.index];
+ break;
+ case InputSourceType::SILENCE:
+ default:
+ assert(false);
}
+ return nullptr;
}
-void AudioMixer::find_sample_src_from_capture_card(const vector<float> *samples_card, unsigned card_index, int source_channel, const float **srcptr, unsigned *stride)
+void AudioMixer::find_sample_src_from_device(const vector<float> *samples_card, DeviceSpec device_spec, int source_channel, const float **srcptr, unsigned *stride)
{
static float zero = 0.0f;
- if (source_channel == -1) {
+ if (source_channel == -1 || device_spec.type == InputSourceType::SILENCE) {
*srcptr = &zero;
*stride = 0;
return;
}
- CaptureCard *card = &cards[card_index];
+ AudioDevice *device = find_audio_device(device_spec);
unsigned channel_index = 0;
- for (int channel : card->interesting_channels) {
+ for (int channel : device->interesting_channels) {
if (channel == source_channel) break;
++channel_index;
}
- assert(channel_index < card->interesting_channels.size());
- *srcptr = &samples_card[card_index][channel_index];
- *stride = card->interesting_channels.size();
+ assert(channel_index < device->interesting_channels.size());
+ *srcptr = &samples_card[device_spec.index][channel_index];
+ *stride = device->interesting_channels.size();
+}
+
+// TODO: Can be SSSE3-optimized if need be.
+void AudioMixer::fill_audio_bus(const vector<float> *samples_card, const InputMapping::Bus &bus, unsigned num_samples, float *output)
+{
+ if (bus.device.type == InputSourceType::SILENCE) {
+ memset(output, 0, num_samples * sizeof(*output));
+ } else {
+ assert(bus.device.type == InputSourceType::CAPTURE_CARD);
+ const float *lsrc, *rsrc;
+ unsigned lstride, rstride;
+ float *dptr = output;
+ find_sample_src_from_device(samples_card, bus.device, bus.source_channel[0], &lsrc, &lstride);
+ find_sample_src_from_device(samples_card, bus.device, bus.source_channel[1], &rsrc, &rstride);
+ for (unsigned i = 0; i < num_samples; ++i) {
+ *dptr++ = *lsrc;
+ *dptr++ = *rsrc;
+ lsrc += lstride;
+ rsrc += rstride;
+ }
+ }
}
vector<float> AudioMixer::get_output(double pts, unsigned num_samples, ResamplingQueue::RateAdjustmentPolicy rate_adjustment_policy)
{
- vector<float> samples_card[MAX_CARDS];
+ vector<float> samples_card[MAX_CARDS]; // TODO: Needs room for other kinds of capture cards.
vector<float> samples_bus;
lock_guard<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 (unsigned card_index = 0; card_index < num_cards; ++card_index) {
- CaptureCard *card = &cards[card_index];
- if (!card->interesting_channels.empty()) {
- samples_card[card_index].resize(num_samples * card->interesting_channels.size());
- card->resampling_queue->get_output_samples(
+ AudioDevice *device = &cards[card_index];
+ if (!device->interesting_channels.empty()) {
+ samples_card[card_index].resize(num_samples * device->interesting_channels.size());
+ device->resampling_queue->get_output_samples(
pts,
&samples_card[card_index][0],
num_samples,
samples_out.resize(num_samples * 2);
samples_bus.resize(num_samples * 2);
for (unsigned bus_index = 0; bus_index < input_mapping.buses.size(); ++bus_index) {
- const InputMapping::Bus &input = input_mapping.buses[bus_index];
- if (input.input_source_type == InputSourceType::SILENCE) {
- memset(&samples_bus[0], 0, samples_bus.size() * sizeof(samples_bus[0]));
- } else {
- // TODO: Move this into its own function. Can be SSSE3-optimized if need be.
- assert(input.input_source_type == InputSourceType::CAPTURE_CARD);
- const float *lsrc, *rsrc;
- unsigned lstride, rstride;
- float *dptr = &samples_bus[0];
- find_sample_src_from_capture_card(samples_card, input.input_source_index, input.source_channel[0], &lsrc, &lstride);
- find_sample_src_from_capture_card(samples_card, input.input_source_index, input.source_channel[1], &rsrc, &rstride);
- for (unsigned i = 0; i < num_samples; ++i) {
- *dptr++ = *lsrc;
- *dptr++ = *rsrc;
- lsrc += lstride;
- rsrc += rstride;
- }
- }
+ fill_audio_bus(samples_card, input_mapping.buses[bus_index], num_samples, &samples_bus[0]);
float volume = from_db(fader_volume_db[bus_index]);
if (bus_index == 0) {
return samples_out;
}
-vector<string> AudioMixer::get_names() const
+map<DeviceSpec, DeviceInfo> AudioMixer::get_devices() const
{
lock_guard<mutex> lock(audio_mutex);
- vector<string> names;
+ map<DeviceSpec, DeviceInfo> devices;
for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
- const CaptureCard *card = &cards[card_index];
- names.push_back(card->name);
+ const DeviceSpec spec{ InputSourceType::CAPTURE_CARD, card_index };
+ const AudioDevice *device = &cards[card_index];
+ DeviceInfo info;
+ info.name = device->name;
+ info.num_channels = 8; // FIXME: This is wrong for fake cards.
+ devices.insert(make_pair(spec, info));
}
- return names;
+ return devices;
}
-void AudioMixer::set_name(unsigned card_index, const string &name)
+void AudioMixer::set_name(DeviceSpec device_spec, const string &name)
{
+ AudioDevice *device = find_audio_device(device_spec);
+
lock_guard<mutex> lock(audio_mutex);
- CaptureCard *card = &cards[card_index];
- card->name = name;
+ device->name = name;
}
void AudioMixer::set_input_mapping(const InputMapping &new_input_mapping)
{
lock_guard<mutex> lock(audio_mutex);
- map<unsigned, set<unsigned>> interesting_channels;
+ map<DeviceSpec, set<unsigned>> interesting_channels;
for (const InputMapping::Bus &bus : new_input_mapping.buses) {
- if (bus.input_source_type == InputSourceType::CAPTURE_CARD) {
+ if (bus.device.type == InputSourceType::CAPTURE_CARD) {
for (unsigned channel = 0; channel < 2; ++channel) {
if (bus.source_channel[channel] != -1) {
- interesting_channels[bus.input_source_index].insert(bus.source_channel[channel]);
+ interesting_channels[bus.device].insert(bus.source_channel[channel]);
}
}
}
// Reset resamplers for all cards that don't have the exact same state as before.
for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
- CaptureCard *card = &cards[card_index];
- if (card->interesting_channels != interesting_channels[card_index]) {
- card->interesting_channels = interesting_channels[card_index];
- reset_card_mutex_held(card_index);
+ DeviceSpec device_spec{InputSourceType::CAPTURE_CARD, card_index};
+ AudioDevice *device = &cards[card_index];
+ if (device->interesting_channels != interesting_channels[device_spec]) {
+ device->interesting_channels = interesting_channels[device_spec];
+ reset_device_mutex_held(DeviceSpec{InputSourceType::CAPTURE_CARD, card_index});
}
}
projects / nageru / blobdiff