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Added support for single channel inputs for PulseAudio

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This commit is contained in:
Marcelo Fernandez 2018-07-27 17:28:41 -03:00
parent 597301db34
commit 913eec5b04
2 changed files with 64 additions and 20 deletions
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80
drivers/pulseaudio/audio_driver_pulseaudio.cpp
View file

@ -64,18 +64,32 @@ void AudioDriverPulseAudio::pa_sink_info_cb(pa_context *c, const pa_sink_info *l
ad->pa_status++;
}
void AudioDriverPulseAudio::pa_source_info_cb(pa_context *c, const pa_source_info *l, int eol, void *userdata) {
AudioDriverPulseAudio *ad = (AudioDriverPulseAudio *)userdata;
// If eol is set to a positive number, you're at the end of the list
if (eol > 0) {
return;
}
ad->pa_rec_map = l->channel_map;
ad->pa_status++;
}
void AudioDriverPulseAudio::pa_server_info_cb(pa_context *c, const pa_server_info *i, void *userdata) {
AudioDriverPulseAudio *ad = (AudioDriverPulseAudio *)userdata;
ad->capture_default_device = i->default_source_name;
ad->default_device = i->default_sink_name;
ad->pa_status++;
}
void AudioDriverPulseAudio::detect_channels() {
void AudioDriverPulseAudio::detect_channels(bool capture) {
pa_channel_map_init_stereo(&pa_map);
pa_channel_map_init_stereo(capture ? &pa_rec_map : &pa_map);
if (device_name == "Default") {
String device = capture ? capture_device_name : device_name;
if (device == "Default") {
// Get the default output device name
pa_status = 0;
pa_operation *pa_op = pa_context_get_server_info(pa_ctx, &AudioDriverPulseAudio::pa_server_info_cb, (void *)this);
@ -93,16 +107,22 @@ void AudioDriverPulseAudio::detect_channels() {
}
}
char device[1024];
if (device_name == "Default") {
strcpy(device, default_device.utf8().get_data());
char dev[1024];
if (device == "Default") {
strcpy(dev, capture ? capture_default_device.utf8().get_data() : default_device.utf8().get_data());
} else {
strcpy(device, device_name.utf8().get_data());
strcpy(dev, device.utf8().get_data());
}
// Now using the device name get the amount of channels
pa_status = 0;
pa_operation *pa_op = pa_context_get_sink_info_by_name(pa_ctx, device, &AudioDriverPulseAudio::pa_sink_info_cb, (void *)this);
pa_operation *pa_op;
if (capture) {
pa_op = pa_context_get_source_info_by_name(pa_ctx, dev, &AudioDriverPulseAudio::pa_source_info_cb, (void *)this);
} else {
pa_op = pa_context_get_sink_info_by_name(pa_ctx, dev, &AudioDriverPulseAudio::pa_sink_info_cb, (void *)this);
}
if (pa_op) {
while (pa_status == 0) {
int ret = pa_mainloop_iterate(pa_ml, 1, NULL);
@ -113,7 +133,11 @@ void AudioDriverPulseAudio::detect_channels() {
pa_operation_unref(pa_op);
} else {
ERR_PRINT("pa_context_get_sink_info_by_name error");
if (capture) {
ERR_PRINT("pa_context_get_source_info_by_name error");
} else {
ERR_PRINT("pa_context_get_sink_info_by_name error");
}
}
}
@ -195,6 +219,10 @@ Error AudioDriverPulseAudio::init_device() {
samples_in.resize(buffer_frames * channels);
samples_out.resize(pa_buffer_size);
// Reset audio input to keep synchronisation.
input_position = 0;
input_size = 0;
return OK;
}
@ -389,9 +417,12 @@ void AudioDriverPulseAudio::thread_func(void *p_udata) {
} else {
int16_t *srcptr = (int16_t *)ptr;
for (size_t i = bytes >> 1; i > 0; i--) {
ad->input_buffer.write[ad->input_position++] = int32_t(*srcptr++) << 16;
if (ad->input_position >= ad->input_buffer.size()) {
ad->input_position = 0;
int32_t sample = int32_t(*srcptr++) << 16;
ad->input_buffer_write(sample);
if (ad->pa_rec_map.channels == 1) {
// In case input device is single channel convert it to Stereo
ad->input_buffer_write(sample);
}
}
@ -571,10 +602,26 @@ Error AudioDriverPulseAudio::capture_init_device() {
}
}
detect_channels(true);
switch (pa_rec_map.channels) {
case 1: // Mono
case 2: // Stereo
break;
default:
WARN_PRINTS("PulseAudio: Unsupported number of input channels: " + itos(pa_rec_map.channels));
pa_channel_map_init_stereo(&pa_rec_map);
break;
}
if (OS::get_singleton()->is_stdout_verbose()) {
print_line("PulseAudio: detected " + itos(pa_rec_map.channels) + " input channels");
}
pa_sample_spec spec;
spec.format = PA_SAMPLE_S16LE;
spec.channels = 2;
spec.channels = pa_rec_map.channels;
spec.rate = mix_rate;
int latency = 30;
@ -584,9 +631,6 @@ Error AudioDriverPulseAudio::capture_init_device() {
pa_buffer_attr attr;
attr.fragsize = buffer_size * sizeof(int16_t);
pa_channel_map pa_rec_map;
pa_channel_map_init_stereo(&pa_rec_map);
pa_rec_str = pa_stream_new(pa_ctx, "Record", &spec, &pa_rec_map);
if (pa_rec_str == NULL) {
ERR_PRINTS("PulseAudio: pa_stream_new error: " + String(pa_strerror(pa_context_errno(pa_ctx))));
@ -602,10 +646,8 @@ Error AudioDriverPulseAudio::capture_init_device() {
}
input_buffer.resize(input_buffer_frames * 8);
for (int i = 0; i < input_buffer.size(); i++) {
input_buffer.write[i] = 0;
}
input_position = 0;
input_size = 0;
return OK;
}

4
drivers/pulseaudio/audio_driver_pulseaudio.h
View file

@ -49,6 +49,7 @@ class AudioDriverPulseAudio : public AudioDriver {
pa_stream *pa_str;
pa_stream *pa_rec_str;
pa_channel_map pa_map;
pa_channel_map pa_rec_map;
String device_name;
String new_device;
@ -79,6 +80,7 @@ class AudioDriverPulseAudio : public AudioDriver {
static void pa_state_cb(pa_context *c, void *userdata);
static void pa_sink_info_cb(pa_context *c, const pa_sink_info *l, int eol, void *userdata);
static void pa_source_info_cb(pa_context *c, const pa_source_info *l, int eol, void *userdata);
static void pa_server_info_cb(pa_context *c, const pa_server_info *i, void *userdata);
static void pa_sinklist_cb(pa_context *c, const pa_sink_info *l, int eol, void *userdata);
static void pa_sourcelist_cb(pa_context *c, const pa_source_info *l, int eol, void *userdata);
@ -89,7 +91,7 @@ class AudioDriverPulseAudio : public AudioDriver {
Error capture_init_device();
void capture_finish_device();
void detect_channels();
void detect_channels(bool capture = false);
static void thread_func(void *p_udata);