godot/modules/stb_vorbis/audio_stream_ogg_vorbis.cpp

280 lines
8.7 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/os/file_access.h"
void AudioStreamPlaybackOGGVorbis::_mix_internal(AudioFrame *p_buffer, int p_frames) {
ERR_FAIL_COND(!active);
int todo = p_frames;
int start_buffer = 0;
while (todo && active) {
float *buffer = (float *)p_buffer;
if (start_buffer > 0) {
buffer = (buffer + start_buffer * 2);
}
int mixed = stb_vorbis_get_samples_float_interleaved(ogg_stream, 2, buffer, todo * 2);
if (vorbis_stream->channels == 1 && mixed > 0) {
//mix mono to stereo
for (int i = start_buffer; i < mixed; i++) {
p_buffer[i].r = p_buffer[i].l;
}
}
todo -= mixed;
frames_mixed += mixed;
if (todo) {
//end of file!
bool is_not_empty = mixed > 0 || stb_vorbis_stream_length_in_samples(ogg_stream) > 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 {
for (int i = p_frames - todo; i < p_frames; i++) {
p_buffer[i] = AudioFrame(0, 0);
}
active = false;
todo = 0;
}
}
}
}
float AudioStreamPlaybackOGGVorbis::get_stream_sampling_rate() {
return vorbis_stream->sample_rate;
}
void AudioStreamPlaybackOGGVorbis::start(float p_from_pos) {
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_stream->sample_rate;
}
void AudioStreamPlaybackOGGVorbis::seek(float p_time) {
if (!active) {
return;
}
if (p_time >= vorbis_stream->get_length()) {
p_time = 0;
}
frames_mixed = uint32_t(vorbis_stream->sample_rate * p_time);
stb_vorbis_seek(ogg_stream, frames_mixed);
}
AudioStreamPlaybackOGGVorbis::~AudioStreamPlaybackOGGVorbis() {
if (ogg_alloc.alloc_buffer) {
stb_vorbis_close(ogg_stream);
memfree(ogg_alloc.alloc_buffer);
}
}
Ref<AudioStreamPlayback> AudioStreamOGGVorbis::instance_playback() {
Ref<AudioStreamPlaybackOGGVorbis> ovs;
ERR_FAIL_COND_V_MSG(data == nullptr, ovs,
"This AudioStreamOGGVorbis does not have an audio file assigned "
"to it. AudioStreamOGGVorbis should not be created from the "
"inspector or with `.new()`. Instead, load an audio file.");
ovs.instance();
ovs->vorbis_stream = Ref<AudioStreamOGGVorbis>(this);
ovs->ogg_alloc.alloc_buffer = (char *)memalloc(decode_mem_size);
ovs->ogg_alloc.alloc_buffer_length_in_bytes = decode_mem_size;
ovs->frames_mixed = 0;
ovs->active = false;
ovs->loops = 0;
int error;
ovs->ogg_stream = stb_vorbis_open_memory((const unsigned char *)data, data_len, &error, &ovs->ogg_alloc);
if (!ovs->ogg_stream) {
memfree(ovs->ogg_alloc.alloc_buffer);
ovs->ogg_alloc.alloc_buffer = nullptr;
ERR_FAIL_COND_V(!ovs->ogg_stream, Ref<AudioStreamPlaybackOGGVorbis>());
}
return ovs;
}
String AudioStreamOGGVorbis::get_stream_name() const {
return ""; //return stream_name;
}
void AudioStreamOGGVorbis::clear_data() {
if (data) {
memfree(data);
data = nullptr;
data_len = 0;
}
}
void AudioStreamOGGVorbis::set_data(const Vector<uint8_t> &p_data) {
int src_data_len = p_data.size();
uint32_t alloc_try = 1024;
Vector<char> alloc_mem;
char *w;
stb_vorbis *ogg_stream = nullptr;
stb_vorbis_alloc ogg_alloc;
// Vorbis comments may be up to UINT32_MAX, but that's arguably pretty rare.
// Let's go with 2^30 so we don't risk going out of bounds.
const uint32_t MAX_TEST_MEM = 1 << 30;
while (alloc_try < MAX_TEST_MEM) {
alloc_mem.resize(alloc_try);
w = alloc_mem.ptrw();
ogg_alloc.alloc_buffer = w;
ogg_alloc.alloc_buffer_length_in_bytes = alloc_try;
const uint8_t *src_datar = p_data.ptr();
int error;
ogg_stream = stb_vorbis_open_memory((const unsigned char *)src_datar, src_data_len, &error, &ogg_alloc);
if (!ogg_stream && error == VORBIS_outofmem) {
alloc_try *= 2;
} else {
ERR_FAIL_COND(alloc_try == MAX_TEST_MEM);
ERR_FAIL_COND(ogg_stream == nullptr);
stb_vorbis_info info = stb_vorbis_get_info(ogg_stream);
channels = info.channels;
sample_rate = info.sample_rate;
decode_mem_size = alloc_try;
//does this work? (it's less mem..)
//decode_mem_size = ogg_alloc.alloc_buffer_length_in_bytes + info.setup_memory_required + info.temp_memory_required + info.max_frame_size;
length = stb_vorbis_stream_length_in_seconds(ogg_stream);
stb_vorbis_close(ogg_stream);
// free any existing data
clear_data();
data = memalloc(src_data_len);
copymem(data, src_datar, src_data_len);
data_len = src_data_len;
break;
}
}
ERR_FAIL_COND_MSG(alloc_try == MAX_TEST_MEM, vformat("Couldn't set vorbis data even with an alloc buffer of %d bytes, report bug.", MAX_TEST_MEM));
}
Vector<uint8_t> AudioStreamOGGVorbis::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 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 {
return length;
}
void AudioStreamOGGVorbis::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_data", "data"), &AudioStreamOGGVorbis::set_data);
ClassDB::bind_method(D_METHOD("get_data"), &AudioStreamOGGVorbis::get_data);
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::PACKED_BYTE_ARRAY, "data", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), "set_data", "get_data");
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() {
data = nullptr;
data_len = 0;
length = 0;
sample_rate = 1;
channels = 1;
loop_offset = 0;
decode_mem_size = 0;
loop = false;
}
AudioStreamOGGVorbis::~AudioStreamOGGVorbis() {
clear_data();
}