/*************************************************************************/ /* ogg_packet_sequence.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 "ogg_packet_sequence.h" #include "core/variant/typed_array.h" void OGGPacketSequence::push_page(int64_t p_granule_pos, const Vector<PackedByteArray> &p_data) { Vector<PackedByteArray> data_stored; for (int i = 0; i < p_data.size(); i++) { data_stored.push_back(p_data[i]); } page_granule_positions.push_back(p_granule_pos); page_data.push_back(data_stored); data_version++; } void OGGPacketSequence::set_packet_data(const Array &p_data) { data_version++; // Update the data version so old playbacks know that they can't rely on us anymore. page_data.clear(); for (int page_idx = 0; page_idx < p_data.size(); page_idx++) { // Push a new page. We cleared the vector so this will be at index `page_idx`. page_data.push_back(Vector<PackedByteArray>()); TypedArray<PackedByteArray> this_page_data = p_data[page_idx]; for (int packet = 0; packet < this_page_data.size(); packet++) { page_data.write[page_idx].push_back(this_page_data[packet]); } } } Array OGGPacketSequence::get_packet_data() const { Array ret; for (const Vector<PackedByteArray> &page : page_data) { Array page_variant; for (const PackedByteArray &packet : page) { page_variant.push_back(packet); } ret.push_back(page_variant); } return ret; } void OGGPacketSequence::set_packet_granule_positions(const Array &p_granule_positions) { data_version++; // Update the data version so old playbacks know that they can't rely on us anymore. page_granule_positions.clear(); for (int page_idx = 0; page_idx < p_granule_positions.size(); page_idx++) { int64_t granule_pos = p_granule_positions[page_idx]; page_granule_positions.push_back(granule_pos); } } Array OGGPacketSequence::get_packet_granule_positions() const { Array ret; for (int64_t granule_pos : page_granule_positions) { ret.push_back(granule_pos); } return ret; } void OGGPacketSequence::set_sampling_rate(float p_sampling_rate) { sampling_rate = p_sampling_rate; } float OGGPacketSequence::get_sampling_rate() const { return sampling_rate; } int64_t OGGPacketSequence::get_final_granule_pos() const { if (!page_granule_positions.is_empty()) { return page_granule_positions[page_granule_positions.size() - 1]; } return -1; } float OGGPacketSequence::get_length() const { int64_t granule_pos = get_final_granule_pos(); if (granule_pos < 0) { return 0; } return granule_pos / sampling_rate; } Ref<OGGPacketSequencePlayback> OGGPacketSequence::instance_playback() { Ref<OGGPacketSequencePlayback> playback; playback.instantiate(); playback->ogg_packet_sequence = Ref<OGGPacketSequence>(this); playback->data_version = data_version; return playback; } void OGGPacketSequence::_bind_methods() { ClassDB::bind_method(D_METHOD("set_packet_data", "packet_data"), &OGGPacketSequence::set_packet_data); ClassDB::bind_method(D_METHOD("get_packet_data"), &OGGPacketSequence::get_packet_data); ClassDB::bind_method(D_METHOD("set_packet_granule_positions", "granule_positions"), &OGGPacketSequence::set_packet_granule_positions); ClassDB::bind_method(D_METHOD("get_packet_granule_positions"), &OGGPacketSequence::get_packet_granule_positions); ClassDB::bind_method(D_METHOD("set_sampling_rate", "sampling_rate"), &OGGPacketSequence::set_sampling_rate); ClassDB::bind_method(D_METHOD("get_sampling_rate"), &OGGPacketSequence::get_sampling_rate); ClassDB::bind_method(D_METHOD("get_length"), &OGGPacketSequence::get_length); ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "packet_data", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), "set_packet_data", "get_packet_data"); ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "granule_positions", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), "set_packet_granule_positions", "get_packet_granule_positions"); ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "sampling_rate", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), "set_sampling_rate", "get_sampling_rate"); } bool OGGPacketSequencePlayback::next_ogg_packet(ogg_packet **p_packet) const { ERR_FAIL_COND_V(data_version != ogg_packet_sequence->data_version, false); ERR_FAIL_COND_V(ogg_packet_sequence->page_data.is_empty(), false); ERR_FAIL_COND_V(ogg_packet_sequence->page_granule_positions.is_empty(), false); // Move on to the next page if need be. This happens first to help simplify seek logic. while (packet_cursor >= ogg_packet_sequence->page_data[page_cursor].size()) { packet_cursor = 0; page_cursor++; if (page_cursor >= ogg_packet_sequence->page_data.size()) { return false; } } ERR_FAIL_COND_V(page_cursor >= ogg_packet_sequence->page_data.size(), false); packet->b_o_s = page_cursor == 0 && packet_cursor == 0; packet->e_o_s = page_cursor == ogg_packet_sequence->page_data.size() - 1 && packet_cursor == ogg_packet_sequence->page_data[page_cursor].size() - 1; packet->granulepos = packet_cursor == ogg_packet_sequence->page_data[page_cursor].size() - 1 ? ogg_packet_sequence->page_granule_positions[page_cursor] : -1; packet->packetno = packetno++; packet->bytes = ogg_packet_sequence->page_data[page_cursor][packet_cursor].size(); packet->packet = (unsigned char *)(ogg_packet_sequence->page_data[page_cursor][packet_cursor].ptr()); *p_packet = packet; packet_cursor++; return true; } uint32_t OGGPacketSequencePlayback::seek_page_internal(int64_t granule, uint32_t after_page_inclusive, uint32_t before_page_inclusive) { if (before_page_inclusive == after_page_inclusive) { return before_page_inclusive; } uint32_t actual_middle_page = after_page_inclusive + (before_page_inclusive - after_page_inclusive) / 2; // Complicating the bisection search algorithm, the middle page might not have a packet that ends on it, // which means it might not have a correct granule position. Find a nearby page that does have a packet ending on it. uint32_t bisection_page = -1; for (uint32_t test_page = actual_middle_page; test_page <= before_page_inclusive; test_page++) { if (ogg_packet_sequence->page_data[test_page].size() > 0) { bisection_page = test_page; break; } } // Check if we have to go backwards. if (bisection_page == (unsigned int)-1) { for (uint32_t test_page = actual_middle_page; test_page >= after_page_inclusive; test_page--) { if (ogg_packet_sequence->page_data[test_page].size() > 0) { bisection_page = test_page; break; } } } if (bisection_page == (unsigned int)-1) { return -1; } int64_t bisection_granule_pos = ogg_packet_sequence->page_granule_positions[bisection_page]; if (granule > bisection_granule_pos) { return seek_page_internal(granule, bisection_page + 1, before_page_inclusive); } else { return seek_page_internal(granule, after_page_inclusive, bisection_page); } } bool OGGPacketSequencePlayback::seek_page(int64_t p_granule_pos) { int correct_page = seek_page_internal(p_granule_pos, 0, ogg_packet_sequence->page_data.size() - 1); if (correct_page == -1) { return false; } packet_cursor = 0; page_cursor = correct_page; // Don't pretend subsequent packets are contiguous with previous ones. packetno = 0; return true; } OGGPacketSequencePlayback::OGGPacketSequencePlayback() { packet = new ogg_packet(); } OGGPacketSequencePlayback::~OGGPacketSequencePlayback() { delete packet; }