Generic RWAC Wave Content: Difference between revisions

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Revision as of 08:29, 20 July 2022 (view source) Burninrubber0 (talk \| contribs) m (Table headers on bit field example) ← Older edit		Latest revision as of 04:07, 4 October 2023 (view source) Burninrubber0 (talk \| contribs) m (Fix infobox)
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Line 1: {{ParadiseResourceTypeInfobox Sometimes referred to as RWAC Wave or simply Wave, the Generic RWAC Wave Content resource type is a container for the EA SndPlayer Plug-In Asset. This is the primary sound asset type used throughout the game.▼ \| name = GenericRwacWaveContent \| othernames = Generic Wave Content \| id = 0xA020 \| category = Sound \| memdist = SNR in Main Memory<br />Audio data in [[Bundle 2/Burnout Paradise#Memory types\|secondary]] \| editor = Yes<br /><sup><small>EALayer3 codecs only</small></sup><br />Use [[Modding/Burnout Paradise\|EALayer3]] }} ▲Sometimes referred to as ~~RWAC~~simply ~~Wave~~as ~~or simply Wave~~waves, the '''Generic RWAC Wave Content''' resource type is a container for the EA SndPlayer Plug-In Asset. This is the primary sound asset type used throughout the game. For reference, RWAC ('''R'''ender'''W'''are '''A'''udio '''C'''ore) is the audio library used by Burnout Paradise and other EA games. = Generating assets = Line 5 ⟶ 16: === Codec === As noted in the [[#EA::Audio::Core::SndPlayerCodec \| enumeration]], there are several codecs to choose from when encoding. ''Burnout'' primarily uses EALayer3, a proprietary offshoot of MPEG Layer 3, or its Spike variant. It also uses XAS certain engine sounds, namely ignition, for reasons unknown. The Xbox 360 version uses EA-XMA for all audio except acceleration/deceleration, which is done with [[Ginsu Wave Content \| Ginsu]] resources. === Play location === Three play locations are supported: RAM, stream, and gigasample. RAM-targeted assets are self-contained and generally found in engines, [[Splicer \| splicers]], and [[AEMS Bank \| AEMS banks]], while streams have data separate from the header and stored in persistent memory instead of RAM. Gigasamples are like streams, but with a portion in RAM so slow access times on the stream portion do not slow ~~playing~~initial playback of the asset. === Loops === Line 14 ⟶ 25: === Data === In these assets, sound data is stored in [[#Chunk \| chunks]] to be loaded, played, and unloaded in sequence. This is done to minimize RAM usage and increase streaming efficiency. All other data is that of the sound itself. = ~~Layout~~Structures = '''Note: Waves begin with a [[Binary File]] resource.''' ~~(Not~~ which are not subject to the following note.) <br/> '''Note: Data is stored in big endian byte order regardless of platform.''' === Header === ~~Unlike most structures, the header for these assets is not in bytes, but bits. As such, an example is given to aid in understanding the format.~~ ~~The offset is replaced with the number of bits, from left to right.~~ {\| class="wikitable" ! ~~Bit~~Offset (bits) !! Length (bits) !! Constant Name !! Description !! Comments \|- \| 0 \|\| 4 \|\| SNDPLAYER_VERSION_BITS \|\| Version number \|\| 0 in Burnout \|- \| 4 \|\| 4 \|\| SNDPLAYER_CODEC_BITS \|\| Codec \|\| See [[#EA::Audio::Core::SndPlayerCodec \| SndPlayerCodec]] \|- \| 8 \|\| 6 \|\| SNDPLAYER_NUMCHANNELS_BITS \|\| Number of channels \|\| Offset by 1 such that 0 = 1, 1 = 2, etc. Line 37 ⟶ 44: \| 14 \|\| 18 \|\| SNDPLAYER_SAMPLERATE_BITS \|\| Sample rate \|\| Expected maximum of 192 kHz but can hold up to 262 kHz \|- \| 32 \|\| 2 \|\| SNDPLAYER_PLAYTYPE_BITS \|\| Play type \|\| See [[#EA::Audio::Core::SndPlayerPlayType \| SndPlayerPlayType]] \|- \| 34 \|\| 1 \|\| SNDPLAYER_LOOPFLAG_BITS \|\| Sets whether the asset is looped \|\| Line 53 ⟶ 60: This represents a typical stream with no additional fields used. <code>05 04 BB 80 40 07 80 AA</code>▼ {\| class="wikitable" ▲~~<code>~~\|+ Hex: 05 04 BB 80 40 07 80 AA~~</code>~~ \|- ! Bit value !! 0 !! 0 !! 0 !! 0 !! 0 !! 1 !! 0 !! 1 !! 0 !! 0 !! 0 !! 0 !! 0 !! 1 !! 0 !! 0 !! 1 !! 0 !! 1 !! 1 !! 1 !! 0 !! 1 !! 1 !! 1 !! 0 !! 0 !! 0 !! 0 !! 0 !! 0 !! 0 \|- \| '''Parsed value''' \|\| colspan=4 \| 0 \|\| colspan=4 \| 5 \|\| colspan=6 \| 1 \|\| colspan=18 \| 48000 \|- \| '''Description''' \|\| colspan=4 \| Version 0 \|\| colspan=4 \| EALayer3 codec \|\| colspan=6 \| 2 channels (stereo) \|\| colspan=18 \| 48 KHz sample rate \|} {\| class="wikitable" ! rowspan=3\|(cont.) !! 0 !! 1 !! 0 !! 0 !! 0 !! 0 !! 0 !! 0 !! 0 !! 0 !! 0 !! 0 !! 0 !! 1 !! 1 !! 1 !! 1 !! 0 !! 0 !! 0 !! 0 !! 0 !! 0 !! 0 !! 1 !! 0 !! 1 !! 0 !! 1 !! 0 !! 1 !! 0▼ \|- \| colspan=2 \| 1 \|\| 0 \|\| colspan=29 \| 491690▼ ▲! (cont.) 0 !! 1 !! 0 !! 0 !! 0 !! 0 !! 0 !! 0 !! 0 !! 0 !! 0 !! 0 !! 0 !! 1 !! 1 !! 1 !! 1 !! 0 !! 0 !! 0 !! 0 !! 0 !! 0 !! 0 !! 1 !! 0 !! 1 !! 0 !! 1 !! 0 !! 1 !! 0 \|- ▲\| colspan=2 \| 1 \|\| 0 \|\| colspan=29 \| 491690 \|- \| colspan=2 \| Stream play type \|\| Not looped \|\| colspan=29 \| 491690 total samples \|} Line 84 ⟶ 89: === EA::Audio::Core::SndPlayerCodec === {\| class="wikitable" \|- ! Name !! Value !! Comments \|- Line 124 ⟶ 128: === EA::Audio::Core::SndPlayerPlayType === {\| class="wikitable" \|- ! Name !! Value !! Comments \|-