mirror of
https://github.com/godotengine/godot
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298 lines
9.3 KiB
C++
298 lines
9.3 KiB
C++
/*************************************************************************/
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/* audio_stream_mp3.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) 2007-2022 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2022 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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#define MINIMP3_ONLY_MP3
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#define MINIMP3_FLOAT_OUTPUT
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#define MINIMP3_IMPLEMENTATION
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#define MINIMP3_NO_STDIO
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#include "audio_stream_mp3.h"
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#include "core/io/file_access.h"
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int AudioStreamPlaybackMP3::_mix_internal(AudioFrame *p_buffer, int p_frames) {
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if (!active) {
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return 0;
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}
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int todo = p_frames;
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int frames_mixed_this_step = p_frames;
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int beat_length_frames = -1;
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bool beat_loop = mp3_stream->has_loop() && mp3_stream->get_bpm() > 0 && mp3_stream->get_beat_count() > 0;
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if (beat_loop) {
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beat_length_frames = mp3_stream->get_beat_count() * mp3_stream->sample_rate * 60 / mp3_stream->get_bpm();
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}
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while (todo && active) {
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mp3dec_frame_info_t frame_info;
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mp3d_sample_t *buf_frame = nullptr;
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int samples_mixed = mp3dec_ex_read_frame(mp3d, &buf_frame, &frame_info, mp3_stream->channels);
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if (samples_mixed) {
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p_buffer[p_frames - todo] = AudioFrame(buf_frame[0], buf_frame[samples_mixed - 1]);
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if (loop_fade_remaining < FADE_SIZE) {
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p_buffer[p_frames - todo] += loop_fade[loop_fade_remaining] * (float(FADE_SIZE - loop_fade_remaining) / float(FADE_SIZE));
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loop_fade_remaining++;
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}
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--todo;
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++frames_mixed;
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if (beat_loop && (int)frames_mixed >= beat_length_frames) {
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for (int i = 0; i < FADE_SIZE; i++) {
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samples_mixed = mp3dec_ex_read_frame(mp3d, &buf_frame, &frame_info, mp3_stream->channels);
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loop_fade[i] = AudioFrame(buf_frame[0], buf_frame[samples_mixed - 1]);
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if (!samples_mixed) {
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break;
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}
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}
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loop_fade_remaining = 0;
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seek(mp3_stream->loop_offset);
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loops++;
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}
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}
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else {
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//EOF
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if (mp3_stream->loop) {
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seek(mp3_stream->loop_offset);
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loops++;
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} else {
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frames_mixed_this_step = p_frames - todo;
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//fill remainder with silence
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for (int i = p_frames - todo; i < p_frames; i++) {
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p_buffer[i] = AudioFrame(0, 0);
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}
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active = false;
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todo = 0;
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}
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}
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}
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return frames_mixed_this_step;
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}
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float AudioStreamPlaybackMP3::get_stream_sampling_rate() {
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return mp3_stream->sample_rate;
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}
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void AudioStreamPlaybackMP3::start(double p_from_pos) {
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active = true;
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seek(p_from_pos);
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loops = 0;
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begin_resample();
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}
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void AudioStreamPlaybackMP3::stop() {
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active = false;
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}
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bool AudioStreamPlaybackMP3::is_playing() const {
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return active;
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}
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int AudioStreamPlaybackMP3::get_loop_count() const {
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return loops;
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}
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double AudioStreamPlaybackMP3::get_playback_position() const {
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return double(frames_mixed) / mp3_stream->sample_rate;
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}
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void AudioStreamPlaybackMP3::seek(double p_time) {
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if (!active) {
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return;
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}
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if (p_time >= mp3_stream->get_length()) {
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p_time = 0;
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}
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frames_mixed = uint32_t(mp3_stream->sample_rate * p_time);
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mp3dec_ex_seek(mp3d, (uint64_t)frames_mixed * mp3_stream->channels);
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}
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void AudioStreamPlaybackMP3::tag_used_streams() {
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mp3_stream->tag_used(get_playback_position());
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}
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AudioStreamPlaybackMP3::~AudioStreamPlaybackMP3() {
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if (mp3d) {
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mp3dec_ex_close(mp3d);
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memfree(mp3d);
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}
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}
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Ref<AudioStreamPlayback> AudioStreamMP3::instantiate_playback() {
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Ref<AudioStreamPlaybackMP3> mp3s;
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ERR_FAIL_COND_V_MSG(data.is_empty(), mp3s,
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"This AudioStreamMP3 does not have an audio file assigned "
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"to it. AudioStreamMP3 should not be created from the "
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"inspector or with `.new()`. Instead, load an audio file.");
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mp3s.instantiate();
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mp3s->mp3_stream = Ref<AudioStreamMP3>(this);
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mp3s->mp3d = (mp3dec_ex_t *)memalloc(sizeof(mp3dec_ex_t));
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int errorcode = mp3dec_ex_open_buf(mp3s->mp3d, data.ptr(), data_len, MP3D_SEEK_TO_SAMPLE);
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mp3s->frames_mixed = 0;
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mp3s->active = false;
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mp3s->loops = 0;
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if (errorcode) {
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ERR_FAIL_COND_V(errorcode, Ref<AudioStreamPlaybackMP3>());
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}
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return mp3s;
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}
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String AudioStreamMP3::get_stream_name() const {
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return ""; //return stream_name;
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}
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void AudioStreamMP3::clear_data() {
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data.clear();
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}
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void AudioStreamMP3::set_data(const Vector<uint8_t> &p_data) {
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int src_data_len = p_data.size();
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const uint8_t *src_datar = p_data.ptr();
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mp3dec_ex_t mp3d;
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int err = mp3dec_ex_open_buf(&mp3d, src_datar, src_data_len, MP3D_SEEK_TO_SAMPLE);
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ERR_FAIL_COND_MSG(err || mp3d.info.hz == 0, "Failed to decode mp3 file. Make sure it is a valid mp3 audio file.");
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channels = mp3d.info.channels;
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sample_rate = mp3d.info.hz;
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length = float(mp3d.samples) / (sample_rate * float(channels));
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mp3dec_ex_close(&mp3d);
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clear_data();
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data.resize(src_data_len);
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memcpy(data.ptrw(), src_datar, src_data_len);
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data_len = src_data_len;
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}
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Vector<uint8_t> AudioStreamMP3::get_data() const {
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return data;
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}
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void AudioStreamMP3::set_loop(bool p_enable) {
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loop = p_enable;
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}
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bool AudioStreamMP3::has_loop() const {
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return loop;
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}
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void AudioStreamMP3::set_loop_offset(double p_seconds) {
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loop_offset = p_seconds;
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}
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double AudioStreamMP3::get_loop_offset() const {
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return loop_offset;
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}
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double AudioStreamMP3::get_length() const {
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return length;
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}
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bool AudioStreamMP3::is_monophonic() const {
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return false;
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}
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void AudioStreamMP3::set_bpm(double p_bpm) {
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ERR_FAIL_COND(p_bpm < 0);
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bpm = p_bpm;
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emit_changed();
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}
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double AudioStreamMP3::get_bpm() const {
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return bpm;
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}
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void AudioStreamMP3::set_beat_count(int p_beat_count) {
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ERR_FAIL_COND(p_beat_count < 0);
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beat_count = p_beat_count;
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emit_changed();
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}
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int AudioStreamMP3::get_beat_count() const {
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return beat_count;
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}
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void AudioStreamMP3::set_bar_beats(int p_bar_beats) {
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ERR_FAIL_COND(p_bar_beats < 0);
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bar_beats = p_bar_beats;
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emit_changed();
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}
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int AudioStreamMP3::get_bar_beats() const {
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return bar_beats;
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}
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void AudioStreamMP3::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_data", "data"), &AudioStreamMP3::set_data);
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ClassDB::bind_method(D_METHOD("get_data"), &AudioStreamMP3::get_data);
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ClassDB::bind_method(D_METHOD("set_loop", "enable"), &AudioStreamMP3::set_loop);
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ClassDB::bind_method(D_METHOD("has_loop"), &AudioStreamMP3::has_loop);
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ClassDB::bind_method(D_METHOD("set_loop_offset", "seconds"), &AudioStreamMP3::set_loop_offset);
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ClassDB::bind_method(D_METHOD("get_loop_offset"), &AudioStreamMP3::get_loop_offset);
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ClassDB::bind_method(D_METHOD("set_bpm", "bpm"), &AudioStreamMP3::set_bpm);
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ClassDB::bind_method(D_METHOD("get_bpm"), &AudioStreamMP3::get_bpm);
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ClassDB::bind_method(D_METHOD("set_beat_count", "count"), &AudioStreamMP3::set_beat_count);
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ClassDB::bind_method(D_METHOD("get_beat_count"), &AudioStreamMP3::get_beat_count);
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ClassDB::bind_method(D_METHOD("set_bar_beats", "count"), &AudioStreamMP3::set_bar_beats);
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ClassDB::bind_method(D_METHOD("get_bar_beats"), &AudioStreamMP3::get_bar_beats);
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ADD_PROPERTY(PropertyInfo(Variant::PACKED_BYTE_ARRAY, "data", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NO_EDITOR), "set_data", "get_data");
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ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "bpm", PROPERTY_HINT_RANGE, "0,400,0.01,or_greater"), "set_bpm", "get_bpm");
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ADD_PROPERTY(PropertyInfo(Variant::INT, "beat_count", PROPERTY_HINT_RANGE, "0,512,1,or_greater"), "set_beat_count", "get_beat_count");
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ADD_PROPERTY(PropertyInfo(Variant::INT, "bar_beats", PROPERTY_HINT_RANGE, "2,32,1,or_greater"), "set_bar_beats", "get_bar_beats");
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ADD_PROPERTY(PropertyInfo(Variant::BOOL, "loop"), "set_loop", "has_loop");
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ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "loop_offset"), "set_loop_offset", "get_loop_offset");
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}
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AudioStreamMP3::AudioStreamMP3() {
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}
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AudioStreamMP3::~AudioStreamMP3() {
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clear_data();
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}
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