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![Rémi Verschelde](/assets/img/avatar_default.png)
As many open source projects have started doing it, we're removing the current year from the copyright notice, so that we don't need to bump it every year. It seems like only the first year of publication is technically relevant for copyright notices, and even that seems to be something that many companies stopped listing altogether (in a version controlled codebase, the commits are a much better source of date of publication than a hardcoded copyright statement). We also now list Godot Engine contributors first as we're collectively the current maintainers of the project, and we clarify that the "exclusive" copyright of the co-founders covers the timespan before opensourcing (their further contributions are included as part of Godot Engine contributors). Also fixed "cf." Frenchism - it's meant as "refer to / see".
551 lines
17 KiB
C++
551 lines
17 KiB
C++
/**************************************************************************/
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/* audio_stream_ogg_vorbis.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) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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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_stream_ogg_vorbis.h"
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#include "core/io/file_access.h"
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#include "core/variant/typed_array.h"
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#include "thirdparty/libogg/ogg/ogg.h"
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int AudioStreamPlaybackOggVorbis::_mix_internal(AudioFrame *p_buffer, int p_frames) {
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ERR_FAIL_COND_V(!ready, 0);
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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 beat_length_frames = -1;
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bool beat_loop = vorbis_stream->has_loop();
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if (beat_loop && vorbis_stream->get_bpm() > 0 && vorbis_stream->get_beat_count() > 0) {
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beat_length_frames = vorbis_stream->get_beat_count() * vorbis_data->get_sampling_rate() * 60 / vorbis_stream->get_bpm();
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}
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while (todo > 0 && active) {
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AudioFrame *buffer = p_buffer;
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buffer += p_frames - todo;
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int to_mix = todo;
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if (beat_length_frames >= 0 && (beat_length_frames - (int)frames_mixed) < to_mix) {
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to_mix = MAX(0, beat_length_frames - (int)frames_mixed);
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}
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int mixed = _mix_frames_vorbis(buffer, to_mix);
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ERR_FAIL_COND_V(mixed < 0, 0);
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todo -= mixed;
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frames_mixed += mixed;
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if (loop_fade_remaining < FADE_SIZE) {
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int to_fade = loop_fade_remaining + MIN(FADE_SIZE - loop_fade_remaining, mixed);
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for (int i = loop_fade_remaining; i < to_fade; i++) {
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buffer[i - loop_fade_remaining] += loop_fade[i] * (float(FADE_SIZE - i) / float(FADE_SIZE));
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}
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loop_fade_remaining = to_fade;
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}
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if (beat_length_frames >= 0) {
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/**
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* Length determined by beat length
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* This code is commented out because, in practice, it is preferred that the fade
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* is done by the transitioner and this stream just goes on until it ends while fading out.
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*
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* End fade implementation is left here for reference in case at some point this feature
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* is desired.
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if (!beat_loop && (int)frames_mixed > beat_length_frames - FADE_SIZE) {
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print_line("beat length fade/after mix?");
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//No loop, just fade and finish
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for (int i = 0; i < mixed; i++) {
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int idx = frames_mixed + i - mixed;
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buffer[i] *= 1.0 - float(MAX(0, (idx - (beat_length_frames - FADE_SIZE)))) / float(FADE_SIZE);
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}
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if ((int)frames_mixed == beat_length_frames) {
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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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break;
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}
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} else
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**/
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if (beat_loop && beat_length_frames <= (int)frames_mixed) {
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// End of file when doing beat-based looping. <= used instead of == because importer editing
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if (!have_packets_left && !have_samples_left) {
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//Nothing remaining, so do nothing.
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loop_fade_remaining = FADE_SIZE;
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} else {
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// Add some loop fade;
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int faded_mix = _mix_frames_vorbis(loop_fade, FADE_SIZE);
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for (int i = faded_mix; i < FADE_SIZE; i++) {
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// In case lesss was mixed, pad with zeros
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loop_fade[i] = AudioFrame(0, 0);
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}
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loop_fade_remaining = 0;
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}
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seek(vorbis_stream->loop_offset);
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loops++;
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// We still have buffer to fill, start from this element in the next iteration.
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continue;
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}
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}
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if (!have_packets_left && !have_samples_left) {
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// Actual end of file!
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bool is_not_empty = mixed > 0 || vorbis_stream->get_length() > 0;
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if (vorbis_stream->loop && is_not_empty) {
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//loop
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seek(vorbis_stream->loop_offset);
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loops++;
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// We still have buffer to fill, start from this element in the next iteration.
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} else {
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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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}
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}
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}
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return p_frames - todo;
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}
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int AudioStreamPlaybackOggVorbis::_mix_frames_vorbis(AudioFrame *p_buffer, int p_frames) {
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ERR_FAIL_COND_V(!ready, 0);
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if (!have_samples_left) {
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ogg_packet *packet = nullptr;
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int err;
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if (!vorbis_data_playback->next_ogg_packet(&packet)) {
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have_packets_left = false;
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WARN_PRINT("ran out of packets in stream");
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return -1;
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}
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err = vorbis_synthesis(&block, packet);
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ERR_FAIL_COND_V_MSG(err != 0, 0, "Error during vorbis synthesis " + itos(err));
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err = vorbis_synthesis_blockin(&dsp_state, &block);
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ERR_FAIL_COND_V_MSG(err != 0, 0, "Error during vorbis block processing " + itos(err));
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have_packets_left = !packet->e_o_s;
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}
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float **pcm; // Accessed with pcm[channel_idx][sample_idx].
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int frames = vorbis_synthesis_pcmout(&dsp_state, &pcm);
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if (frames > p_frames) {
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frames = p_frames;
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have_samples_left = true;
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} else {
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have_samples_left = false;
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}
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if (info.channels > 1) {
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for (int frame = 0; frame < frames; frame++) {
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p_buffer[frame].l = pcm[0][frame];
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p_buffer[frame].r = pcm[1][frame];
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}
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} else {
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for (int frame = 0; frame < frames; frame++) {
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p_buffer[frame].l = pcm[0][frame];
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p_buffer[frame].r = pcm[0][frame];
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}
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}
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vorbis_synthesis_read(&dsp_state, frames);
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return frames;
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}
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float AudioStreamPlaybackOggVorbis::get_stream_sampling_rate() {
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return vorbis_data->get_sampling_rate();
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}
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bool AudioStreamPlaybackOggVorbis::_alloc_vorbis() {
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vorbis_info_init(&info);
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info_is_allocated = true;
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vorbis_comment_init(&comment);
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comment_is_allocated = true;
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ERR_FAIL_COND_V(vorbis_data.is_null(), false);
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vorbis_data_playback = vorbis_data->instantiate_playback();
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ogg_packet *packet;
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int err;
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for (int i = 0; i < 3; i++) {
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if (!vorbis_data_playback->next_ogg_packet(&packet)) {
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WARN_PRINT("Not enough packets to parse header");
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return false;
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}
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err = vorbis_synthesis_headerin(&info, &comment, packet);
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ERR_FAIL_COND_V_MSG(err != 0, false, "Error parsing header");
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}
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err = vorbis_synthesis_init(&dsp_state, &info);
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ERR_FAIL_COND_V_MSG(err != 0, false, "Error initializing dsp state");
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dsp_state_is_allocated = true;
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err = vorbis_block_init(&dsp_state, &block);
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ERR_FAIL_COND_V_MSG(err != 0, false, "Error initializing block");
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block_is_allocated = true;
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ready = true;
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return true;
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}
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void AudioStreamPlaybackOggVorbis::start(double p_from_pos) {
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ERR_FAIL_COND(!ready);
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loop_fade_remaining = FADE_SIZE;
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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 AudioStreamPlaybackOggVorbis::stop() {
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active = false;
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}
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bool AudioStreamPlaybackOggVorbis::is_playing() const {
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return active;
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}
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int AudioStreamPlaybackOggVorbis::get_loop_count() const {
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return loops;
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}
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double AudioStreamPlaybackOggVorbis::get_playback_position() const {
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return double(frames_mixed) / (double)vorbis_data->get_sampling_rate();
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}
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void AudioStreamPlaybackOggVorbis::tag_used_streams() {
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vorbis_stream->tag_used(get_playback_position());
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}
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void AudioStreamPlaybackOggVorbis::seek(double p_time) {
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ERR_FAIL_COND(!ready);
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ERR_FAIL_COND(vorbis_stream.is_null());
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if (!active) {
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return;
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}
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vorbis_synthesis_restart(&dsp_state);
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if (p_time >= vorbis_stream->get_length()) {
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p_time = 0;
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}
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frames_mixed = uint32_t(vorbis_data->get_sampling_rate() * p_time);
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const int64_t desired_sample = p_time * get_stream_sampling_rate();
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if (!vorbis_data_playback->seek_page(desired_sample)) {
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WARN_PRINT("seek failed");
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return;
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}
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ogg_packet *packet;
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if (!vorbis_data_playback->next_ogg_packet(&packet)) {
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WARN_PRINT_ONCE("seeking beyond limits");
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return;
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}
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// The granule position of the page we're seeking through.
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int64_t granule_pos = 0;
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int headers_remaining = 0;
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int samples_in_page = 0;
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int err;
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while (true) {
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if (vorbis_synthesis_idheader(packet)) {
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headers_remaining = 3;
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}
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if (!headers_remaining) {
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err = vorbis_synthesis(&block, packet);
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ERR_FAIL_COND_MSG(err != 0, "Error during vorbis synthesis " + itos(err));
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err = vorbis_synthesis_blockin(&dsp_state, &block);
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ERR_FAIL_COND_MSG(err != 0, "Error during vorbis block processing " + itos(err));
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int samples_out = vorbis_synthesis_pcmout(&dsp_state, nullptr);
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err = vorbis_synthesis_read(&dsp_state, samples_out);
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ERR_FAIL_COND_MSG(err != 0, "Error during vorbis read updating " + itos(err));
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samples_in_page += samples_out;
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} else {
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headers_remaining--;
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}
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if (packet->granulepos != -1 && headers_remaining == 0) {
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// This indicates the end of the page.
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granule_pos = packet->granulepos;
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break;
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}
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if (packet->e_o_s) {
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break;
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}
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if (!vorbis_data_playback->next_ogg_packet(&packet)) {
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// We should get an e_o_s flag before this happens.
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WARN_PRINT("Vorbis file ended without warning.");
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break;
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}
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}
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int64_t samples_to_burn = samples_in_page - (granule_pos - desired_sample);
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if (samples_to_burn > samples_in_page) {
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WARN_PRINT("Burning more samples than we have in this page. Check seek algorithm.");
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} else if (samples_to_burn < 0) {
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WARN_PRINT("Burning negative samples doesn't make sense. Check seek algorithm.");
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}
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// Seek again, this time we'll burn a specific number of samples instead of all of them.
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if (!vorbis_data_playback->seek_page(desired_sample)) {
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WARN_PRINT("seek failed");
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return;
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}
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if (!vorbis_data_playback->next_ogg_packet(&packet)) {
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WARN_PRINT_ONCE("seeking beyond limits");
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return;
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}
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vorbis_synthesis_restart(&dsp_state);
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while (true) {
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if (vorbis_synthesis_idheader(packet)) {
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headers_remaining = 3;
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}
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if (!headers_remaining) {
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err = vorbis_synthesis(&block, packet);
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ERR_FAIL_COND_MSG(err != 0, "Error during vorbis synthesis " + itos(err));
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err = vorbis_synthesis_blockin(&dsp_state, &block);
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ERR_FAIL_COND_MSG(err != 0, "Error during vorbis block processing " + itos(err));
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int samples_out = vorbis_synthesis_pcmout(&dsp_state, nullptr);
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int read_samples = samples_to_burn > samples_out ? samples_out : samples_to_burn;
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err = vorbis_synthesis_read(&dsp_state, samples_out);
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ERR_FAIL_COND_MSG(err != 0, "Error during vorbis read updating " + itos(err));
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samples_to_burn -= read_samples;
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if (samples_to_burn <= 0) {
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break;
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}
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} else {
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headers_remaining--;
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}
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if (packet->granulepos != -1 && headers_remaining == 0) {
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// This indicates the end of the page.
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break;
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}
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if (packet->e_o_s) {
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break;
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}
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if (!vorbis_data_playback->next_ogg_packet(&packet)) {
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// We should get an e_o_s flag before this happens.
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WARN_PRINT("Vorbis file ended without warning.");
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break;
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}
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}
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}
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AudioStreamPlaybackOggVorbis::~AudioStreamPlaybackOggVorbis() {
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if (block_is_allocated) {
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vorbis_block_clear(&block);
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}
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if (dsp_state_is_allocated) {
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vorbis_dsp_clear(&dsp_state);
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}
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if (comment_is_allocated) {
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vorbis_comment_clear(&comment);
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}
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if (info_is_allocated) {
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vorbis_info_clear(&info);
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}
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}
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Ref<AudioStreamPlayback> AudioStreamOggVorbis::instantiate_playback() {
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Ref<AudioStreamPlaybackOggVorbis> ovs;
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ERR_FAIL_COND_V(packet_sequence.is_null(), nullptr);
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ovs.instantiate();
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ovs->vorbis_stream = Ref<AudioStreamOggVorbis>(this);
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ovs->vorbis_data = packet_sequence;
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ovs->frames_mixed = 0;
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ovs->active = false;
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ovs->loops = 0;
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if (ovs->_alloc_vorbis()) {
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return ovs;
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}
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// Failed to allocate data structures.
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return nullptr;
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}
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String AudioStreamOggVorbis::get_stream_name() const {
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return ""; //return stream_name;
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}
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void AudioStreamOggVorbis::maybe_update_info() {
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ERR_FAIL_COND(packet_sequence.is_null());
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vorbis_info info;
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vorbis_comment comment;
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int err;
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vorbis_info_init(&info);
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vorbis_comment_init(&comment);
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Ref<OggPacketSequencePlayback> packet_sequence_playback = packet_sequence->instantiate_playback();
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for (int i = 0; i < 3; i++) {
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ogg_packet *packet;
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if (!packet_sequence_playback->next_ogg_packet(&packet)) {
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WARN_PRINT("Failed to get header packet");
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break;
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}
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if (i == 0) {
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packet->b_o_s = 1;
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ERR_FAIL_COND(!vorbis_synthesis_idheader(packet));
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}
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err = vorbis_synthesis_headerin(&info, &comment, packet);
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ERR_FAIL_COND_MSG(err != 0, "Error parsing header packet " + itos(i) + ": " + itos(err));
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}
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packet_sequence->set_sampling_rate(info.rate);
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vorbis_comment_clear(&comment);
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vorbis_info_clear(&info);
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}
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void AudioStreamOggVorbis::set_packet_sequence(Ref<OggPacketSequence> p_packet_sequence) {
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packet_sequence = p_packet_sequence;
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if (packet_sequence.is_valid()) {
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maybe_update_info();
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}
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}
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Ref<OggPacketSequence> AudioStreamOggVorbis::get_packet_sequence() const {
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return packet_sequence;
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}
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void AudioStreamOggVorbis::set_loop(bool p_enable) {
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loop = p_enable;
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}
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bool AudioStreamOggVorbis::has_loop() const {
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return loop;
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}
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void AudioStreamOggVorbis::set_loop_offset(double p_seconds) {
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loop_offset = p_seconds;
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}
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double AudioStreamOggVorbis::get_loop_offset() const {
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return loop_offset;
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}
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double AudioStreamOggVorbis::get_length() const {
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ERR_FAIL_COND_V(packet_sequence.is_null(), 0);
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return packet_sequence->get_length();
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|
}
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|
|
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void AudioStreamOggVorbis::set_bpm(double p_bpm) {
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ERR_FAIL_COND(p_bpm < 0);
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bpm = p_bpm;
|
|
emit_changed();
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|
}
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|
|
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double AudioStreamOggVorbis::get_bpm() const {
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return bpm;
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|
}
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|
|
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void AudioStreamOggVorbis::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;
|
|
emit_changed();
|
|
}
|
|
|
|
int AudioStreamOggVorbis::get_beat_count() const {
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|
return beat_count;
|
|
}
|
|
|
|
void AudioStreamOggVorbis::set_bar_beats(int p_bar_beats) {
|
|
ERR_FAIL_COND(p_bar_beats < 2);
|
|
bar_beats = p_bar_beats;
|
|
emit_changed();
|
|
}
|
|
|
|
int AudioStreamOggVorbis::get_bar_beats() const {
|
|
return bar_beats;
|
|
}
|
|
|
|
bool AudioStreamOggVorbis::is_monophonic() const {
|
|
return false;
|
|
}
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|
|
|
void AudioStreamOggVorbis::_bind_methods() {
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|
ClassDB::bind_method(D_METHOD("set_packet_sequence", "packet_sequence"), &AudioStreamOggVorbis::set_packet_sequence);
|
|
ClassDB::bind_method(D_METHOD("get_packet_sequence"), &AudioStreamOggVorbis::get_packet_sequence);
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|
|
|
ClassDB::bind_method(D_METHOD("set_loop", "enable"), &AudioStreamOggVorbis::set_loop);
|
|
ClassDB::bind_method(D_METHOD("has_loop"), &AudioStreamOggVorbis::has_loop);
|
|
|
|
ClassDB::bind_method(D_METHOD("set_loop_offset", "seconds"), &AudioStreamOggVorbis::set_loop_offset);
|
|
ClassDB::bind_method(D_METHOD("get_loop_offset"), &AudioStreamOggVorbis::get_loop_offset);
|
|
|
|
ClassDB::bind_method(D_METHOD("set_bpm", "bpm"), &AudioStreamOggVorbis::set_bpm);
|
|
ClassDB::bind_method(D_METHOD("get_bpm"), &AudioStreamOggVorbis::get_bpm);
|
|
|
|
ClassDB::bind_method(D_METHOD("set_beat_count", "count"), &AudioStreamOggVorbis::set_beat_count);
|
|
ClassDB::bind_method(D_METHOD("get_beat_count"), &AudioStreamOggVorbis::get_beat_count);
|
|
|
|
ClassDB::bind_method(D_METHOD("set_bar_beats", "count"), &AudioStreamOggVorbis::set_bar_beats);
|
|
ClassDB::bind_method(D_METHOD("get_bar_beats"), &AudioStreamOggVorbis::get_bar_beats);
|
|
|
|
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "packet_sequence", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NO_EDITOR), "set_packet_sequence", "get_packet_sequence");
|
|
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "bpm", PROPERTY_HINT_RANGE, "0,400,0.01,or_greater"), "set_bpm", "get_bpm");
|
|
ADD_PROPERTY(PropertyInfo(Variant::INT, "beat_count", PROPERTY_HINT_RANGE, "0,512,1,or_greater"), "set_beat_count", "get_beat_count");
|
|
ADD_PROPERTY(PropertyInfo(Variant::INT, "bar_beats", PROPERTY_HINT_RANGE, "2,32,1,or_greater"), "set_bar_beats", "get_bar_beats");
|
|
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "loop"), "set_loop", "has_loop");
|
|
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "loop_offset"), "set_loop_offset", "get_loop_offset");
|
|
}
|
|
|
|
AudioStreamOggVorbis::AudioStreamOggVorbis() {}
|
|
|
|
AudioStreamOggVorbis::~AudioStreamOggVorbis() {}
|