godot/modules/vorbis/audio_stream_ogg_vorbis.cpp
2021-09-09 19:39:04 -07:00

436 lines
13 KiB
C++

/*************************************************************************/
/* audio_stream_ogg_vorbis.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "audio_stream_ogg_vorbis.h"
#include "core/io/file_access.h"
#include "core/variant/typed_array.h"
#include "thirdparty/libogg/ogg/ogg.h"
int AudioStreamPlaybackOGGVorbis::_mix_internal(AudioFrame *p_buffer, int p_frames) {
ERR_FAIL_COND_V(!ready, 0);
ERR_FAIL_COND_V(!active, 0);
int todo = p_frames;
int start_buffer = 0;
int frames_mixed_this_step = p_frames;
while (todo && active) {
AudioFrame *buffer = p_buffer;
if (start_buffer > 0) {
buffer = buffer + start_buffer;
}
int mixed = _mix_frames_vorbis(buffer, todo);
if (mixed < 0) {
return 0;
}
todo -= mixed;
frames_mixed += mixed;
start_buffer += mixed;
if (!have_packets_left) {
//end of file!
bool is_not_empty = mixed > 0 || vorbis_stream->get_length() > 0;
if (vorbis_stream->loop && is_not_empty) {
//loop
seek(vorbis_stream->loop_offset);
loops++;
// we still have buffer to fill, start from this element in the next iteration.
start_buffer = p_frames - todo;
} else {
frames_mixed_this_step = p_frames - todo;
for (int i = p_frames - todo; i < p_frames; i++) {
p_buffer[i] = AudioFrame(0, 0);
}
active = false;
todo = 0;
}
}
}
return frames_mixed_this_step;
}
int AudioStreamPlaybackOGGVorbis::_mix_frames_vorbis(AudioFrame *p_buffer, int p_frames) {
ERR_FAIL_COND_V(!ready, 0);
if (!have_samples_left) {
ogg_packet *packet = nullptr;
int err;
if (!vorbis_data_playback->next_ogg_packet(&packet)) {
have_packets_left = false;
WARN_PRINT("ran out of packets in stream");
return -1;
}
ERR_FAIL_COND_V_MSG((err = vorbis_synthesis(&block, packet)), 0, "Error during vorbis synthesis " + itos(err));
ERR_FAIL_COND_V_MSG((err = vorbis_synthesis_blockin(&dsp_state, &block)), 0, "Error during vorbis block processing " + itos(err));
have_packets_left = !packet->e_o_s;
}
float **pcm; // Accessed with pcm[channel_idx][sample_idx].
int frames = vorbis_synthesis_pcmout(&dsp_state, &pcm);
if (frames > p_frames) {
frames = p_frames;
have_samples_left = true;
} else {
have_samples_left = false;
}
if (info.channels > 1) {
for (int frame = 0; frame < frames; frame++) {
p_buffer[frame].l = pcm[0][frame];
p_buffer[frame].r = pcm[0][frame];
}
} else {
for (int frame = 0; frame < frames; frame++) {
p_buffer[frame].l = pcm[0][frame];
p_buffer[frame].r = pcm[0][frame];
}
}
vorbis_synthesis_read(&dsp_state, frames);
return frames;
}
float AudioStreamPlaybackOGGVorbis::get_stream_sampling_rate() {
return vorbis_data->get_sampling_rate();
}
bool AudioStreamPlaybackOGGVorbis::_alloc_vorbis() {
vorbis_info_init(&info);
info_is_allocated = true;
vorbis_comment_init(&comment);
comment_is_allocated = true;
ERR_FAIL_COND_V(vorbis_data.is_null(), false);
vorbis_data_playback = vorbis_data->instance_playback();
ogg_packet *packet;
int err;
for (int i = 0; i < 3; i++) {
if (!vorbis_data_playback->next_ogg_packet(&packet)) {
WARN_PRINT("Not enough packets to parse header");
return false;
}
err = vorbis_synthesis_headerin(&info, &comment, packet);
ERR_FAIL_COND_V_MSG(err != 0, false, "Error parsing header");
}
err = vorbis_synthesis_init(&dsp_state, &info);
ERR_FAIL_COND_V_MSG(err != 0, false, "Error initializing dsp state");
dsp_state_is_allocated = true;
err = vorbis_block_init(&dsp_state, &block);
ERR_FAIL_COND_V_MSG(err != 0, false, "Error initializing block");
block_is_allocated = true;
ready = true;
return true;
}
void AudioStreamPlaybackOGGVorbis::start(float p_from_pos) {
ERR_FAIL_COND(!ready);
active = true;
seek(p_from_pos);
loops = 0;
_begin_resample();
}
void AudioStreamPlaybackOGGVorbis::stop() {
active = false;
}
bool AudioStreamPlaybackOGGVorbis::is_playing() const {
return active;
}
int AudioStreamPlaybackOGGVorbis::get_loop_count() const {
return loops;
}
float AudioStreamPlaybackOGGVorbis::get_playback_position() const {
return float(frames_mixed) / vorbis_data->get_sampling_rate();
}
void AudioStreamPlaybackOGGVorbis::seek(float p_time) {
ERR_FAIL_COND(!ready);
ERR_FAIL_COND(vorbis_stream.is_null());
if (!active) {
return;
}
vorbis_synthesis_restart(&dsp_state);
if (p_time >= vorbis_stream->get_length()) {
p_time = 0;
}
frames_mixed = uint32_t(vorbis_data->get_sampling_rate() * p_time);
const int64_t desired_sample = p_time * get_stream_sampling_rate();
if (!vorbis_data_playback->seek_page(desired_sample)) {
WARN_PRINT("seek failed");
return;
}
ogg_packet *packet;
if (!vorbis_data_playback->next_ogg_packet(&packet)) {
WARN_PRINT_ONCE("seeking beyond limits");
return;
}
// The granule position of the page we're seeking through.
int64_t granule_pos = 0;
int headers_remaining = 0;
int samples_in_page = 0;
int err;
while (true) {
if (vorbis_synthesis_idheader(packet)) {
headers_remaining = 3;
}
if (!headers_remaining) {
ERR_FAIL_COND_MSG((err = vorbis_synthesis(&block, packet)), "Error during vorbis synthesis " + itos(err));
ERR_FAIL_COND_MSG((err = vorbis_synthesis_blockin(&dsp_state, &block)), "Error during vorbis block processing " + itos(err));
int samples_out = vorbis_synthesis_pcmout(&dsp_state, nullptr);
ERR_FAIL_COND_MSG((err = vorbis_synthesis_read(&dsp_state, samples_out)), "Error during vorbis read updating " + itos(err));
samples_in_page += samples_out;
} else {
headers_remaining--;
}
if (packet->granulepos != -1 && headers_remaining == 0) {
// This indicates the end of the page.
granule_pos = packet->granulepos;
break;
}
if (packet->e_o_s) {
break;
}
if (!vorbis_data_playback->next_ogg_packet(&packet)) {
// We should get an e_o_s flag before this happens.
WARN_PRINT("Vorbis file ended without warning.");
break;
}
}
int64_t samples_to_burn = samples_in_page - (granule_pos - desired_sample);
if (samples_to_burn > samples_in_page) {
WARN_PRINT("Burning more samples than we have in this page. Check seek algorithm.");
} else if (samples_to_burn < 0) {
WARN_PRINT("Burning negative samples doesn't make sense. Check seek algorithm.");
}
// Seek again, this time we'll burn a specific number of samples instead of all of them.
if (!vorbis_data_playback->seek_page(desired_sample)) {
WARN_PRINT("seek failed");
return;
}
if (!vorbis_data_playback->next_ogg_packet(&packet)) {
WARN_PRINT_ONCE("seeking beyond limits");
return;
}
vorbis_synthesis_restart(&dsp_state);
while (true) {
if (vorbis_synthesis_idheader(packet)) {
headers_remaining = 3;
}
if (!headers_remaining) {
ERR_FAIL_COND_MSG((err = vorbis_synthesis(&block, packet)), "Error during vorbis synthesis " + itos(err));
ERR_FAIL_COND_MSG((err = vorbis_synthesis_blockin(&dsp_state, &block)), "Error during vorbis block processing " + itos(err));
int samples_out = vorbis_synthesis_pcmout(&dsp_state, nullptr);
int read_samples = samples_to_burn > samples_out ? samples_out : samples_to_burn;
ERR_FAIL_COND_MSG((err = vorbis_synthesis_read(&dsp_state, samples_out)), "Error during vorbis read updating " + itos(err));
samples_to_burn -= read_samples;
if (samples_to_burn <= 0) {
break;
}
} else {
headers_remaining--;
}
if (packet->granulepos != -1 && headers_remaining == 0) {
// This indicates the end of the page.
break;
}
if (packet->e_o_s) {
break;
}
if (!vorbis_data_playback->next_ogg_packet(&packet)) {
// We should get an e_o_s flag before this happens.
WARN_PRINT("Vorbis file ended without warning.");
break;
}
}
}
AudioStreamPlaybackOGGVorbis::~AudioStreamPlaybackOGGVorbis() {
if (block_is_allocated) {
vorbis_block_clear(&block);
}
if (dsp_state_is_allocated) {
vorbis_dsp_clear(&dsp_state);
}
if (comment_is_allocated) {
vorbis_comment_clear(&comment);
}
if (info_is_allocated) {
vorbis_info_clear(&info);
}
}
Ref<AudioStreamPlayback> AudioStreamOGGVorbis::instance_playback() {
Ref<AudioStreamPlaybackOGGVorbis> ovs;
ERR_FAIL_COND_V(packet_sequence.is_null(), nullptr);
ovs.instantiate();
ovs->vorbis_stream = Ref<AudioStreamOGGVorbis>(this);
ovs->vorbis_data = packet_sequence;
ovs->frames_mixed = 0;
ovs->active = false;
ovs->loops = 0;
if (ovs->_alloc_vorbis()) {
return ovs;
}
// Failed to allocate data structures.
return nullptr;
}
String AudioStreamOGGVorbis::get_stream_name() const {
return ""; //return stream_name;
}
void AudioStreamOGGVorbis::maybe_update_info() {
ERR_FAIL_COND(packet_sequence.is_null());
vorbis_info info;
vorbis_comment comment;
int err;
vorbis_info_init(&info);
vorbis_comment_init(&comment);
int packet_count = 0;
Ref<OGGPacketSequencePlayback> packet_sequence_playback = packet_sequence->instance_playback();
for (int i = 0; i < 3; i++) {
ogg_packet *packet;
if (!packet_sequence_playback->next_ogg_packet(&packet)) {
WARN_PRINT("Failed to get header packet");
break;
}
if (i == 0) {
packet->b_o_s = 1;
}
if (i == 0) {
ERR_FAIL_COND(!vorbis_synthesis_idheader(packet));
}
err = vorbis_synthesis_headerin(&info, &comment, packet);
ERR_FAIL_COND_MSG(err != 0, "Error parsing header packet " + itos(i) + ": " + itos(err));
packet_count++;
}
packet_sequence->set_sampling_rate(info.rate);
vorbis_comment_clear(&comment);
vorbis_info_clear(&info);
}
void AudioStreamOGGVorbis::set_packet_sequence(Ref<OGGPacketSequence> p_packet_sequence) {
packet_sequence = p_packet_sequence;
if (packet_sequence.is_valid()) {
maybe_update_info();
}
}
Ref<OGGPacketSequence> AudioStreamOGGVorbis::get_packet_sequence() const {
return packet_sequence;
}
void AudioStreamOGGVorbis::set_loop(bool p_enable) {
loop = p_enable;
}
bool AudioStreamOGGVorbis::has_loop() const {
return loop;
}
void AudioStreamOGGVorbis::set_loop_offset(float p_seconds) {
loop_offset = p_seconds;
}
float AudioStreamOGGVorbis::get_loop_offset() const {
return loop_offset;
}
float AudioStreamOGGVorbis::get_length() const {
ERR_FAIL_COND_V(packet_sequence.is_null(), 0);
return packet_sequence->get_length();
}
bool AudioStreamOGGVorbis::is_monophonic() const {
return false;
}
void AudioStreamOGGVorbis::_bind_methods() {
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);
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);
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "packet_sequence", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), "set_packet_sequence", "get_packet_sequence");
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() {}