347 lines
8.9 KiB
C++
347 lines
8.9 KiB
C++
/*************************************************************************/
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/* audio_driver_pulseaudio.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md) */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "audio_driver_pulseaudio.h"
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#ifdef PULSEAUDIO_ENABLED
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#include <pulse/pulseaudio.h>
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#include "os/os.h"
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#include "project_settings.h"
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void pa_state_cb(pa_context *c, void *userdata) {
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pa_context_state_t state;
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int *pa_ready = (int *)userdata;
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state = pa_context_get_state(c);
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switch (state) {
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case PA_CONTEXT_FAILED:
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case PA_CONTEXT_TERMINATED:
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*pa_ready = 2;
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break;
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case PA_CONTEXT_READY:
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*pa_ready = 1;
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break;
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}
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}
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void sink_info_cb(pa_context *c, const pa_sink_info *l, int eol, void *userdata) {
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unsigned int *channels = (unsigned int *)userdata;
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// If eol is set to a positive number, you're at the end of the list
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if (eol > 0) {
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return;
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}
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*channels = l->channel_map.channels;
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}
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void server_info_cb(pa_context *c, const pa_server_info *i, void *userdata) {
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char *default_output = (char *)userdata;
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strncpy(default_output, i->default_sink_name, 1024);
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}
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static unsigned int detect_channels() {
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pa_mainloop *pa_ml;
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pa_mainloop_api *pa_mlapi;
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pa_operation *pa_op;
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pa_context *pa_ctx;
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int state = 0;
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int pa_ready = 0;
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char default_output[1024];
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unsigned int channels = 2;
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pa_ml = pa_mainloop_new();
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pa_mlapi = pa_mainloop_get_api(pa_ml);
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pa_ctx = pa_context_new(pa_mlapi, "Godot");
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int ret = pa_context_connect(pa_ctx, NULL, PA_CONTEXT_NOFLAGS, NULL);
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if (ret < 0) {
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pa_context_unref(pa_ctx);
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pa_mainloop_free(pa_ml);
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return 2;
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}
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pa_context_set_state_callback(pa_ctx, pa_state_cb, &pa_ready);
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// Wait until the pa server is ready
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while (pa_ready == 0) {
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pa_mainloop_iterate(pa_ml, 1, NULL);
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}
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// Check if there was an error connecting to the pa server
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if (pa_ready == 2) {
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pa_context_disconnect(pa_ctx);
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pa_context_unref(pa_ctx);
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pa_mainloop_free(pa_ml);
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return 2;
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}
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// Get the default output device name
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pa_op = pa_context_get_server_info(pa_ctx, &server_info_cb, (void *)default_output);
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if (pa_op) {
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while (pa_operation_get_state(pa_op) == PA_OPERATION_RUNNING) {
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ret = pa_mainloop_iterate(pa_ml, 1, NULL);
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if (ret < 0) {
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ERR_PRINT("pa_mainloop_iterate error");
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}
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}
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pa_operation_unref(pa_op);
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// Now using the device name get the amount of channels
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pa_op = pa_context_get_sink_info_by_name(pa_ctx, default_output, &sink_info_cb, (void *)&channels);
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if (pa_op) {
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while (pa_operation_get_state(pa_op) == PA_OPERATION_RUNNING) {
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ret = pa_mainloop_iterate(pa_ml, 1, NULL);
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if (ret < 0) {
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ERR_PRINT("pa_mainloop_iterate error");
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}
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}
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pa_operation_unref(pa_op);
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} else {
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ERR_PRINT("pa_context_get_sink_info_by_name error");
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}
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} else {
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ERR_PRINT("pa_context_get_server_info error");
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}
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pa_context_disconnect(pa_ctx);
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pa_context_unref(pa_ctx);
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pa_mainloop_free(pa_ml);
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return channels;
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}
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Error AudioDriverPulseAudio::init() {
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active = false;
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thread_exited = false;
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exit_thread = false;
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mix_rate = GLOBAL_DEF("audio/mix_rate", DEFAULT_MIX_RATE);
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channels = detect_channels();
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switch (channels) {
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case 2: // Stereo
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case 4: // Surround 3.1
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case 6: // Surround 5.1
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case 8: // Surround 7.1
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break;
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default:
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ERR_PRINTS("PulseAudio: Unsupported number of channels: " + itos(channels));
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ERR_FAIL_V(ERR_CANT_OPEN);
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break;
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}
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pa_sample_spec spec;
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spec.format = PA_SAMPLE_S16LE;
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spec.channels = channels;
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spec.rate = mix_rate;
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int latency = GLOBAL_DEF("audio/output_latency", DEFAULT_OUTPUT_LATENCY);
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buffer_frames = closest_power_of_2(latency * mix_rate / 1000);
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buffer_size = buffer_frames * channels;
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if (OS::get_singleton()->is_stdout_verbose()) {
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print_line("PulseAudio: detected " + itos(channels) + " channels");
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print_line("PulseAudio: audio buffer frames: " + itos(buffer_frames) + " calculated latency: " + itos(buffer_frames * 1000 / mix_rate) + "ms");
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}
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pa_buffer_attr attr;
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// set to appropriate buffer length (in bytes) from global settings
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attr.tlength = buffer_size * sizeof(int16_t);
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// set them to be automatically chosen
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attr.prebuf = (uint32_t)-1;
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attr.maxlength = (uint32_t)-1;
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attr.minreq = (uint32_t)-1;
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int error_code;
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pulse = pa_simple_new(NULL, // default server
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"Godot", // application name
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PA_STREAM_PLAYBACK,
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NULL, // default device
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"Sound", // stream description
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&spec,
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NULL, // use default channel map
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&attr, // use buffering attributes from above
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&error_code);
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if (pulse == NULL) {
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fprintf(stderr, "PulseAudio ERR: %s\n", pa_strerror(error_code));
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ERR_FAIL_COND_V(pulse == NULL, ERR_CANT_OPEN);
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}
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samples_in.resize(buffer_size);
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samples_out.resize(buffer_size);
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mutex = Mutex::create();
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thread = Thread::create(AudioDriverPulseAudio::thread_func, this);
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return OK;
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}
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float AudioDriverPulseAudio::get_latency() {
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if (latency == 0) { //only do this once since it's approximate anyway
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int error_code;
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pa_usec_t palat = pa_simple_get_latency(pulse, &error_code);
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latency = double(palat) / 1000000.0;
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}
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return latency;
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}
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void AudioDriverPulseAudio::thread_func(void *p_udata) {
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AudioDriverPulseAudio *ad = (AudioDriverPulseAudio *)p_udata;
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while (!ad->exit_thread) {
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if (!ad->active) {
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for (unsigned int i = 0; i < ad->buffer_size; i++) {
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ad->samples_out[i] = 0;
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}
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} else {
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ad->lock();
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ad->audio_server_process(ad->buffer_frames, ad->samples_in.ptrw());
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ad->unlock();
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for (unsigned int i = 0; i < ad->buffer_size; i++) {
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ad->samples_out[i] = ad->samples_in[i] >> 16;
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}
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}
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// pa_simple_write always consumes the entire buffer
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int error_code;
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int byte_size = ad->buffer_size * sizeof(int16_t);
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if (pa_simple_write(ad->pulse, ad->samples_out.ptr(), byte_size, &error_code) < 0) {
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// can't recover here
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fprintf(stderr, "PulseAudio failed and can't recover: %s\n", pa_strerror(error_code));
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ad->active = false;
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ad->exit_thread = true;
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break;
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}
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}
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ad->thread_exited = true;
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}
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void AudioDriverPulseAudio::start() {
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active = true;
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}
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int AudioDriverPulseAudio::get_mix_rate() const {
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return mix_rate;
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}
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AudioDriver::SpeakerMode AudioDriverPulseAudio::get_speaker_mode() const {
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return get_speaker_mode_by_total_channels(channels);
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}
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void AudioDriverPulseAudio::lock() {
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if (!thread || !mutex)
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return;
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mutex->lock();
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}
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void AudioDriverPulseAudio::unlock() {
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if (!thread || !mutex)
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return;
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mutex->unlock();
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}
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void AudioDriverPulseAudio::finish() {
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if (!thread)
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return;
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exit_thread = true;
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Thread::wait_to_finish(thread);
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if (pulse) {
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pa_simple_free(pulse);
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pulse = NULL;
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}
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memdelete(thread);
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if (mutex) {
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memdelete(mutex);
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mutex = NULL;
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}
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thread = NULL;
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}
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AudioDriverPulseAudio::AudioDriverPulseAudio() {
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mutex = NULL;
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thread = NULL;
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pulse = NULL;
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samples_in.clear();
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samples_out.clear();
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mix_rate = 0;
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buffer_size = 0;
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channels = 0;
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active = false;
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thread_exited = false;
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exit_thread = false;
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latency = 0;
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buffer_frames = 0;
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buffer_size = 0;
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channels = 0;
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}
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AudioDriverPulseAudio::~AudioDriverPulseAudio() {
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}
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#endif
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