/*************************************************************************/ /* audio_stream_mp3.cpp */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2021 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. */ /*************************************************************************/ #define MINIMP3_ONLY_MP3 #define MINIMP3_FLOAT_OUTPUT #define MINIMP3_IMPLEMENTATION #define MINIMP3_NO_STDIO #include "audio_stream_mp3.h" #include "core/os/file_access.h" void AudioStreamPlaybackMP3::_mix_internal(AudioFrame *p_buffer, int p_frames) { ERR_FAIL_COND(!active); int todo = p_frames; while (todo && active) { mp3dec_frame_info_t frame_info; mp3d_sample_t *buf_frame = nullptr; int samples_mixed = mp3dec_ex_read_frame(mp3d, &buf_frame, &frame_info, mp3_stream->channels); if (samples_mixed) { p_buffer[p_frames - todo] = AudioFrame(buf_frame[0], buf_frame[samples_mixed - 1]); --todo; ++frames_mixed; } else { //EOF if (mp3_stream->loop) { seek(mp3_stream->loop_offset); loops++; } else { //fill remainder with silence for (int i = p_frames - todo; i < p_frames; i++) { p_buffer[i] = AudioFrame(0, 0); } active = false; todo = 0; } } } } float AudioStreamPlaybackMP3::get_stream_sampling_rate() { return mp3_stream->sample_rate; } void AudioStreamPlaybackMP3::start(float p_from_pos) { active = true; seek(p_from_pos); loops = 0; _begin_resample(); } void AudioStreamPlaybackMP3::stop() { active = false; } bool AudioStreamPlaybackMP3::is_playing() const { return active; } int AudioStreamPlaybackMP3::get_loop_count() const { return loops; } float AudioStreamPlaybackMP3::get_playback_position() const { return float(frames_mixed) / mp3_stream->sample_rate; } void AudioStreamPlaybackMP3::seek(float p_time) { if (!active) return; if (p_time >= mp3_stream->get_length()) { p_time = 0; } frames_mixed = uint32_t(mp3_stream->sample_rate * p_time); mp3dec_ex_seek(mp3d, frames_mixed * mp3_stream->channels); } AudioStreamPlaybackMP3::~AudioStreamPlaybackMP3() { if (mp3d) { mp3dec_ex_close(mp3d); memfree(mp3d); } } Ref<AudioStreamPlayback> AudioStreamMP3::instance_playback() { Ref<AudioStreamPlaybackMP3> mp3s; ERR_FAIL_COND_V_MSG(data == nullptr, mp3s, "This AudioStreamMP3 does not have an audio file assigned " "to it. AudioStreamMP3 should not be created from the " "inspector or with `.new()`. Instead, load an audio file."); mp3s.instance(); mp3s->mp3_stream = Ref<AudioStreamMP3>(this); mp3s->mp3d = (mp3dec_ex_t *)memalloc(sizeof(mp3dec_ex_t)); int errorcode = mp3dec_ex_open_buf(mp3s->mp3d, (const uint8_t *)data, data_len, MP3D_SEEK_TO_SAMPLE); mp3s->frames_mixed = 0; mp3s->active = false; mp3s->loops = 0; if (errorcode) { ERR_FAIL_COND_V(errorcode, Ref<AudioStreamPlaybackMP3>()); } return mp3s; } String AudioStreamMP3::get_stream_name() const { return ""; //return stream_name; } void AudioStreamMP3::clear_data() { if (data) { memfree(data); data = nullptr; data_len = 0; } } void AudioStreamMP3::set_data(const Vector<uint8_t> &p_data) { int src_data_len = p_data.size(); const uint8_t *src_datar = p_data.ptr(); mp3dec_ex_t mp3d; int err = mp3dec_ex_open_buf(&mp3d, src_datar, src_data_len, MP3D_SEEK_TO_SAMPLE); ERR_FAIL_COND(err != 0); channels = mp3d.info.channels; sample_rate = mp3d.info.hz; length = float(mp3d.samples) / (sample_rate * float(channels)); mp3dec_ex_close(&mp3d); clear_data(); data = memalloc(src_data_len); copymem(data, src_datar, src_data_len); data_len = src_data_len; } Vector<uint8_t> AudioStreamMP3::get_data() const { Vector<uint8_t> vdata; if (data_len && data) { vdata.resize(data_len); { uint8_t *w = vdata.ptrw(); copymem(w, data, data_len); } } return vdata; } void AudioStreamMP3::set_loop(bool p_enable) { loop = p_enable; } bool AudioStreamMP3::has_loop() const { return loop; } void AudioStreamMP3::set_loop_offset(float p_seconds) { loop_offset = p_seconds; } float AudioStreamMP3::get_loop_offset() const { return loop_offset; } float AudioStreamMP3::get_length() const { return length; } void AudioStreamMP3::_bind_methods() { ClassDB::bind_method(D_METHOD("set_data", "data"), &AudioStreamMP3::set_data); ClassDB::bind_method(D_METHOD("get_data"), &AudioStreamMP3::get_data); ClassDB::bind_method(D_METHOD("set_loop", "enable"), &AudioStreamMP3::set_loop); ClassDB::bind_method(D_METHOD("has_loop"), &AudioStreamMP3::has_loop); ClassDB::bind_method(D_METHOD("set_loop_offset", "seconds"), &AudioStreamMP3::set_loop_offset); ClassDB::bind_method(D_METHOD("get_loop_offset"), &AudioStreamMP3::get_loop_offset); ADD_PROPERTY(PropertyInfo(Variant::PACKED_BYTE_ARRAY, "data", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), "set_data", "get_data"); ADD_PROPERTY(PropertyInfo(Variant::BOOL, "loop", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), "set_loop", "has_loop"); ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "loop_offset", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), "set_loop_offset", "get_loop_offset"); } AudioStreamMP3::AudioStreamMP3() { } AudioStreamMP3::~AudioStreamMP3() { clear_data(); }