diff options
Diffstat (limited to 'modules/minimp3/audio_stream_mp3.cpp')
| -rw-r--r-- | modules/minimp3/audio_stream_mp3.cpp | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/modules/minimp3/audio_stream_mp3.cpp b/modules/minimp3/audio_stream_mp3.cpp new file mode 100644 index 0000000000..b20c043e0c --- /dev/null +++ b/modules/minimp3/audio_stream_mp3.cpp @@ -0,0 +1,228 @@ +/*************************************************************************/ +/* audio_stream_mp3.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2020 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(data == nullptr, mp3s); + + 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; + mp3dec_ex_open_buf(&mp3d, src_datar, src_data_len, MP3D_SEEK_TO_SAMPLE); + + 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(); +} |