diff options
Diffstat (limited to 'platform/web/audio_driver_web.cpp')
| -rw-r--r-- | platform/web/audio_driver_web.cpp | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/platform/web/audio_driver_web.cpp b/platform/web/audio_driver_web.cpp new file mode 100644 index 0000000000..0e37afc2cc --- /dev/null +++ b/platform/web/audio_driver_web.cpp @@ -0,0 +1,293 @@ +/*************************************************************************/ +/* audio_driver_web.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */ +/* */ +/* Permission is hereby granted, free of charge, to any person obtaining */ +/* a copy of this software and associated documentation files (the */ +/* "Software"), to deal in the Software without restriction, including */ +/* without limitation the rights to use, copy, modify, merge, publish, */ +/* distribute, sublicense, and/or sell copies of the Software, and to */ +/* permit persons to whom the Software is furnished to do so, subject to */ +/* the following conditions: */ +/* */ +/* The above copyright notice and this permission notice shall be */ +/* included in all copies or substantial portions of the Software. */ +/* */ +/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ +/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ +/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ +/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ +/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ +/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ +/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ +/*************************************************************************/ + +#include "audio_driver_web.h" + +#include "core/config/project_settings.h" + +#include <emscripten.h> + +AudioDriverWeb::AudioContext AudioDriverWeb::audio_context; + +bool AudioDriverWeb::is_available() { + return godot_audio_is_available() != 0; +} + +void AudioDriverWeb::_state_change_callback(int p_state) { + AudioDriverWeb::audio_context.state = p_state; +} + +void AudioDriverWeb::_latency_update_callback(float p_latency) { + AudioDriverWeb::audio_context.output_latency = p_latency; +} + +void AudioDriverWeb::_audio_driver_process(int p_from, int p_samples) { + int32_t *stream_buffer = reinterpret_cast<int32_t *>(output_rb); + const int max_samples = memarr_len(output_rb); + + int write_pos = p_from; + int to_write = p_samples; + if (to_write == 0) { + to_write = max_samples; + } + // High part + if (write_pos + to_write > max_samples) { + const int samples_high = max_samples - write_pos; + audio_server_process(samples_high / channel_count, &stream_buffer[write_pos]); + for (int i = write_pos; i < max_samples; i++) { + output_rb[i] = float(stream_buffer[i] >> 16) / 32768.f; + } + to_write -= samples_high; + write_pos = 0; + } + // Leftover + audio_server_process(to_write / channel_count, &stream_buffer[write_pos]); + for (int i = write_pos; i < write_pos + to_write; i++) { + output_rb[i] = float(stream_buffer[i] >> 16) / 32768.f; + } +} + +void AudioDriverWeb::_audio_driver_capture(int p_from, int p_samples) { + if (get_input_buffer().size() == 0) { + return; // Input capture stopped. + } + const int max_samples = memarr_len(input_rb); + + int read_pos = p_from; + int to_read = p_samples; + if (to_read == 0) { + to_read = max_samples; + } + // High part + if (read_pos + to_read > max_samples) { + const int samples_high = max_samples - read_pos; + for (int i = read_pos; i < max_samples; i++) { + input_buffer_write(int32_t(input_rb[i] * 32768.f) * (1U << 16)); + } + to_read -= samples_high; + read_pos = 0; + } + // Leftover + for (int i = read_pos; i < read_pos + to_read; i++) { + input_buffer_write(int32_t(input_rb[i] * 32768.f) * (1U << 16)); + } +} + +Error AudioDriverWeb::init() { + int latency = GLOBAL_GET("audio/driver/output_latency"); + if (!audio_context.inited) { + audio_context.mix_rate = GLOBAL_GET("audio/driver/mix_rate"); + audio_context.channel_count = godot_audio_init(&audio_context.mix_rate, latency, &_state_change_callback, &_latency_update_callback); + audio_context.inited = true; + } + mix_rate = audio_context.mix_rate; + channel_count = audio_context.channel_count; + buffer_length = closest_power_of_2((latency * mix_rate / 1000)); + Error err = create(buffer_length, channel_count); + if (err != OK) { + return err; + } + if (output_rb) { + memdelete_arr(output_rb); + } + const size_t array_size = buffer_length * (size_t)channel_count; + output_rb = memnew_arr(float, array_size); + if (!output_rb) { + return ERR_OUT_OF_MEMORY; + } + if (input_rb) { + memdelete_arr(input_rb); + } + input_rb = memnew_arr(float, array_size); + if (!input_rb) { + return ERR_OUT_OF_MEMORY; + } + return OK; +} + +void AudioDriverWeb::start() { + start(output_rb, memarr_len(output_rb), input_rb, memarr_len(input_rb)); +} + +void AudioDriverWeb::resume() { + if (audio_context.state == 0) { // 'suspended' + godot_audio_resume(); + } +} + +float AudioDriverWeb::get_latency() { + return audio_context.output_latency + (float(buffer_length) / mix_rate); +} + +int AudioDriverWeb::get_mix_rate() const { + return mix_rate; +} + +AudioDriver::SpeakerMode AudioDriverWeb::get_speaker_mode() const { + return get_speaker_mode_by_total_channels(channel_count); +} + +void AudioDriverWeb::finish() { + finish_driver(); + if (output_rb) { + memdelete_arr(output_rb); + output_rb = nullptr; + } + if (input_rb) { + memdelete_arr(input_rb); + input_rb = nullptr; + } +} + +Error AudioDriverWeb::capture_start() { + lock(); + input_buffer_init(buffer_length); + unlock(); + if (godot_audio_capture_start()) { + return FAILED; + } + return OK; +} + +Error AudioDriverWeb::capture_stop() { + godot_audio_capture_stop(); + lock(); + input_buffer.clear(); + unlock(); + return OK; +} + +#ifdef NO_THREADS +/// ScriptProcessorNode implementation +AudioDriverScriptProcessor *AudioDriverScriptProcessor::singleton = nullptr; + +void AudioDriverScriptProcessor::_process_callback() { + AudioDriverScriptProcessor::singleton->_audio_driver_capture(); + AudioDriverScriptProcessor::singleton->_audio_driver_process(); +} + +Error AudioDriverScriptProcessor::create(int &p_buffer_samples, int p_channels) { + if (!godot_audio_has_script_processor()) { + return ERR_UNAVAILABLE; + } + return (Error)godot_audio_script_create(&p_buffer_samples, p_channels); +} + +void AudioDriverScriptProcessor::start(float *p_out_buf, int p_out_buf_size, float *p_in_buf, int p_in_buf_size) { + godot_audio_script_start(p_in_buf, p_in_buf_size, p_out_buf, p_out_buf_size, &_process_callback); +} + +/// AudioWorkletNode implementation (no threads) +AudioDriverWorklet *AudioDriverWorklet::singleton = nullptr; + +Error AudioDriverWorklet::create(int &p_buffer_size, int p_channels) { + if (!godot_audio_has_worklet()) { + return ERR_UNAVAILABLE; + } + return (Error)godot_audio_worklet_create(p_channels); +} + +void AudioDriverWorklet::start(float *p_out_buf, int p_out_buf_size, float *p_in_buf, int p_in_buf_size) { + _audio_driver_process(); + godot_audio_worklet_start_no_threads(p_out_buf, p_out_buf_size, &_process_callback, p_in_buf, p_in_buf_size, &_capture_callback); +} + +void AudioDriverWorklet::_process_callback(int p_pos, int p_samples) { + AudioDriverWorklet *driver = AudioDriverWorklet::singleton; + driver->_audio_driver_process(p_pos, p_samples); +} + +void AudioDriverWorklet::_capture_callback(int p_pos, int p_samples) { + AudioDriverWorklet *driver = AudioDriverWorklet::singleton; + driver->_audio_driver_capture(p_pos, p_samples); +} +#else +/// AudioWorkletNode implementation (threads) +void AudioDriverWorklet::_audio_thread_func(void *p_data) { + AudioDriverWorklet *driver = static_cast<AudioDriverWorklet *>(p_data); + const int out_samples = memarr_len(driver->get_output_rb()); + const int in_samples = memarr_len(driver->get_input_rb()); + int wpos = 0; + int to_write = out_samples; + int rpos = 0; + int to_read = 0; + int32_t step = 0; + while (!driver->quit) { + if (to_read) { + driver->lock(); + driver->_audio_driver_capture(rpos, to_read); + godot_audio_worklet_state_add(driver->state, STATE_SAMPLES_IN, -to_read); + driver->unlock(); + rpos += to_read; + if (rpos >= in_samples) { + rpos -= in_samples; + } + } + if (to_write) { + driver->lock(); + driver->_audio_driver_process(wpos, to_write); + godot_audio_worklet_state_add(driver->state, STATE_SAMPLES_OUT, to_write); + driver->unlock(); + wpos += to_write; + if (wpos >= out_samples) { + wpos -= out_samples; + } + } + step = godot_audio_worklet_state_wait(driver->state, STATE_PROCESS, step, 1); + to_write = out_samples - godot_audio_worklet_state_get(driver->state, STATE_SAMPLES_OUT); + to_read = godot_audio_worklet_state_get(driver->state, STATE_SAMPLES_IN); + } +} + +Error AudioDriverWorklet::create(int &p_buffer_size, int p_channels) { + if (!godot_audio_has_worklet()) { + return ERR_UNAVAILABLE; + } + return (Error)godot_audio_worklet_create(p_channels); +} + +void AudioDriverWorklet::start(float *p_out_buf, int p_out_buf_size, float *p_in_buf, int p_in_buf_size) { + godot_audio_worklet_start(p_in_buf, p_in_buf_size, p_out_buf, p_out_buf_size, state); + thread.start(_audio_thread_func, this); +} + +void AudioDriverWorklet::lock() { + mutex.lock(); +} + +void AudioDriverWorklet::unlock() { + mutex.unlock(); +} + +void AudioDriverWorklet::finish_driver() { + quit = true; // Ask thread to quit. + thread.wait_to_finish(); +} +#endif |