435 lines
13 KiB
C++
435 lines
13 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) 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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#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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ERR_FAIL_COND_V(!active, 0);
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int todo = p_frames;
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int start_buffer = 0;
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int frames_mixed_this_step = p_frames;
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while (todo && active) {
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AudioFrame *buffer = p_buffer;
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if (start_buffer > 0) {
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buffer = buffer + start_buffer;
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}
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int mixed = _mix_frames_vorbis(buffer, todo);
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if (mixed < 0) {
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return 0;
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}
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todo -= mixed;
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frames_mixed += mixed;
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start_buffer += mixed;
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if (!have_packets_left && !have_samples_left) {
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//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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start_buffer = p_frames - todo;
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} else {
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frames_mixed_this_step = p_frames - todo;
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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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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_FAIL_COND_V_MSG((err = vorbis_synthesis(&block, packet)), 0, "Error during vorbis synthesis " + itos(err));
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ERR_FAIL_COND_V_MSG((err = vorbis_synthesis_blockin(&dsp_state, &block)), 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->instance_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(float p_from_pos) {
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ERR_FAIL_COND(!ready);
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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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float AudioStreamPlaybackOGGVorbis::get_playback_position() const {
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return float(frames_mixed) / vorbis_data->get_sampling_rate();
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}
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void AudioStreamPlaybackOGGVorbis::seek(float 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_FAIL_COND_MSG((err = vorbis_synthesis(&block, packet)), "Error during vorbis synthesis " + itos(err));
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ERR_FAIL_COND_MSG((err = vorbis_synthesis_blockin(&dsp_state, &block)), "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_FAIL_COND_MSG((err = vorbis_synthesis_read(&dsp_state, samples_out)), "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_FAIL_COND_MSG((err = vorbis_synthesis(&block, packet)), "Error during vorbis synthesis " + itos(err));
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ERR_FAIL_COND_MSG((err = vorbis_synthesis_blockin(&dsp_state, &block)), "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_FAIL_COND_MSG((err = vorbis_synthesis_read(&dsp_state, samples_out)), "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::instance_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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int packet_count = 0;
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Ref<OGGPacketSequencePlayback> packet_sequence_playback = packet_sequence->instance_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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}
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if (i == 0) {
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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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packet_count++;
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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(float p_seconds) {
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loop_offset = p_seconds;
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}
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float AudioStreamOGGVorbis::get_loop_offset() const {
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return loop_offset;
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}
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float 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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bool AudioStreamOGGVorbis::is_monophonic() const {
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return false;
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}
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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);
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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);
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ClassDB::bind_method(D_METHOD("has_loop"), &AudioStreamOGGVorbis::has_loop);
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ClassDB::bind_method(D_METHOD("set_loop_offset", "seconds"), &AudioStreamOGGVorbis::set_loop_offset);
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ClassDB::bind_method(D_METHOD("get_loop_offset"), &AudioStreamOGGVorbis::get_loop_offset);
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ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "packet_sequence", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NO_EDITOR), "set_packet_sequence", "get_packet_sequence");
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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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AudioStreamOGGVorbis::AudioStreamOGGVorbis() {}
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AudioStreamOGGVorbis::~AudioStreamOGGVorbis() {}
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