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Diffstat (limited to 'modules/ogg/ogg_packet_sequence.h')
| -rw-r--r-- | modules/ogg/ogg_packet_sequence.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/modules/ogg/ogg_packet_sequence.h b/modules/ogg/ogg_packet_sequence.h new file mode 100644 index 0000000000..b00ada06c1 --- /dev/null +++ b/modules/ogg/ogg_packet_sequence.h @@ -0,0 +1,128 @@ +/*************************************************************************/ +/* ogg_packet_sequence.h */ +/*************************************************************************/ +/* 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. */ +/*************************************************************************/ + +#ifndef OGG_PACKET_SEQUENCE_H +#define OGG_PACKET_SEQUENCE_H + +#include "core/io/resource.h" +#include "core/object/gdvirtual.gen.inc" +#include "core/variant/native_ptr.h" +#include "core/variant/typed_array.h" +#include "core/variant/variant.h" +#include "thirdparty/libogg/ogg/ogg.h" + +class OGGPacketSequencePlayback; + +class OGGPacketSequence : public Resource { + GDCLASS(OGGPacketSequence, Resource); + + friend class OGGPacketSequencePlayback; + + // List of pages, each of which is a list of packets on that page. The innermost PackedByteArrays contain complete ogg packets. + Vector<Vector<PackedByteArray>> page_data; + + // List of the granule position for each page. + Vector<uint64_t> page_granule_positions; + + // The page after the current last page. Similar semantics to an end() iterator. + int64_t end_page = 0; + + uint64_t data_version = 0; + + float sampling_rate = 0; + float length = 0; + +protected: + static void _bind_methods(); + +public: + // Pushes information about all the pages that ended on this page. + // This should be called for each page, even for pages that no packets ended on. + void push_page(int64_t p_granule_pos, const Vector<PackedByteArray> &p_data); + + void set_packet_data(const Array &p_data); + Array get_packet_data() const; + + void set_packet_granule_positions(const Array &p_granule_positions); + Array get_packet_granule_positions() const; + + // Sets a sampling rate associated with this object. OGGPacketSequence doesn't understand codecs, + // so this value is naively stored as a convenience. + void set_sampling_rate(float p_sampling_rate); + + // Returns a sampling rate previously set by set_sampling_rate(). + float get_sampling_rate() const; + + // Returns a length previously set by set_length(). + float get_length() const; + + // Returns the granule position of the last page in this sequence. + int64_t get_final_granule_pos() const; + + Ref<OGGPacketSequencePlayback> instance_playback(); + + OGGPacketSequence() {} + virtual ~OGGPacketSequence() {} +}; + +class OGGPacketSequencePlayback : public RefCounted { + GDCLASS(OGGPacketSequencePlayback, RefCounted); + + friend class OGGPacketSequence; + + Ref<OGGPacketSequence> ogg_packet_sequence; + + mutable int64_t page_cursor = 0; + mutable int32_t packet_cursor = 0; + + mutable ogg_packet *packet; + + uint64_t data_version; + + mutable int64_t packetno = 0; + + // Recursive bisection search for the correct page. + uint32_t seek_page_internal(int64_t granule, uint32_t after_page_inclusive, uint32_t before_page_inclusive); + +public: + // Calling functions must not modify this packet. + // Returns true on success, false on error or if there is no next packet. + bool next_ogg_packet(ogg_packet **p_packet) const; + + // Seeks to the page such that the previous page has a granule position less than or equal to this value, + // and the current page has a granule position greater than this value. + // Returns true on success, false on failure. + bool seek_page(int64_t p_granule_pos); + + OGGPacketSequencePlayback(); + virtual ~OGGPacketSequencePlayback(); +}; + +#endif // OGG_PACKET_SEQUENCE_H |