DSP (File Format) - Revision history

Encounter: Fix syntaxhighlight

2023-10-11T16:28:53Z

Fix syntaxhighlight

← Older revision		Revision as of 16:28, 11 October 2023
Line 110:		Line 110:
	[https://github.com/kode54/vgmstream/blob/master/src/coding/ngc_dsp_decoder.c vgmstream] used as reference:		[https://github.com/kode54/vgmstream/blob/master/src/coding/ngc_dsp_decoder.c vgmstream] used as reference:

	<syntaxhighlight lang="c">		<syntaxhighlight lang="c">static const s8 nibble_to_s8[16] = {0,1,2,3,4,5,6,7,-8,-7,-6,-5,-4,-3,-2,-1};
	static const s8 nibble_to_s8[16] = {0,1,2,3,4,5,6,7,-8,-7,-6,-5,-4,-3,-2,-1};

	s8 get_low_nibble(u8 byte) {		s8 get_low_nibble(u8 byte) {
Line 163:		Line 162:
	}		}
	}		}
	}		}</syntaxhighlight>
	</syntaxhighlight>

	[[Category:Audio]]		[[Category:Audio]]
	[[Category:Metroid Prime]]		[[Category:Metroid Prime]]
	[[Category:Metroid Prime 2: Echoes]]		[[Category:Metroid Prime 2: Echoes]]

Encounter: Fix syntaxhighlight

2023-10-11T16:27:42Z

Fix syntaxhighlight

← Older revision		Revision as of 16:27, 11 October 2023
Line 110:		Line 110:
	[https://github.com/kode54/vgmstream/blob/master/src/coding/ngc_dsp_decoder.c vgmstream] used as reference:		[https://github.com/kode54/vgmstream/blob/master/src/coding/ngc_dsp_decoder.c vgmstream] used as reference:

	<syntaxhighlight lang="c">static const s8 nibble_to_s8[16] = {0,1,2,3,4,5,6,7,-8,-7,-6,-5,-4,-3,-2,-1};		<syntaxhighlight lang="c">
			static const s8 nibble_to_s8[16] = {0,1,2,3,4,5,6,7,-8,-7,-6,-5,-4,-3,-2,-1};

	s8 get_low_nibble(u8 byte) {		s8 get_low_nibble(u8 byte) {
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	}		}
	}		}
	}</syntaxhighlight>		}
			</syntaxhighlight>

	[[Category:Audio]]		[[Category:Audio]]
	[[Category:Metroid Prime]]		[[Category:Metroid Prime]]
	[[Category:Metroid Prime 2: Echoes]]		[[Category:Metroid Prime 2: Echoes]]

>Aruki: /* Header */

2015-02-09T04:42:58Z

Header

← Older revision		Revision as of 04:42, 9 February 2015
Line 99:		Line 99:
	\|-		\|-
	\| 0x60		\| 0x60
	\| colspan=2 {{unknown\|End of DSP header}}		\| colspan=3 {{unknown\|End of DSP header}}
	\|}		\|}

>Aruki: /* Header */ adding types

2015-02-09T04:41:37Z

Header: adding types

← Older revision		Revision as of 04:41, 9 February 2015
Line 9:		Line 9:
	{\| class="wikitable"		{\| class="wikitable"
	! Offset		! Offset
			! Type
	! Size		! Size
	! Description		! Description
	\|-		\|-
	\| 0x0		\| 0x0
			\| u32
	\| 4		\| 4
	\| '''Sample count'''		\| '''Sample count'''
	\|-		\|-
	\| 0x4		\| 0x4
			\| u32
	\| 4		\| 4
	\| '''ADPCM nibble count'''; includes frame headers		\| '''ADPCM nibble count'''; includes frame headers
	\|-		\|-
	\| 0x8		\| 0x8
			\| u32
	\| 4		\| 4
	\| '''Sample rate'''		\| '''Sample rate'''
	\|-		\|-
	\| 0xC		\| 0xC
			\| u16
	\| 2		\| 2
	\| '''Loop flag'''; 1 means looped, 0 means not looped		\| '''Loop flag'''; 1 means looped, 0 means not looped
	\|-		\|-
	\| 0xE		\| 0xE
			\| u16
	\| 2		\| 2
	\| '''Format'''; always 0		\| '''Format'''; always 0
	\|-		\|-
	\| 0x10		\| 0x10
			\| u32
	\| 4		\| 4
	\| '''Loop start offset'''		\| '''Loop start offset'''
	\|-		\|-
	\| 0x14		\| 0x14
			\| u32
	\| 4		\| 4
	\| '''Loop end offset'''		\| '''Loop end offset'''
	\|-		\|-
	\| 0x18		\| 0x18
			\| u32
	\| 4		\| 4
	\| '''Current address'''; always 0		\| '''Current address'''; always 0
	\|-		\|-
	\| 0x1C		\| 0x1C
			\| s16[16]
	\| 2 × 16		\| 2 × 16
	\| '''Decode coefficients'''; this is 8 pairs of signed 16-bit values		\| '''Decode coefficients'''; this is 8 pairs of signed 16-bit values
	\|-		\|-
	\| 0x3C		\| 0x3C
			\| u16
	\| 2		\| 2
	\| '''Gain'''; always 0		\| '''Gain'''; always 0
	\|-		\|-
	\| 0x3E		\| 0x3E
			\| u16
	\| 2		\| 2
	\| '''Initial predictor/scale'''; always matches first frame header		\| '''Initial predictor/scale'''; always matches first frame header
	\|-		\|-
	\| 0x40		\| 0x40
			\| s16
	\| 2		\| 2
	\| '''Initial sample history 1'''		\| '''Initial sample history 1'''
	\|-		\|-
	\| 0x42		\| 0x42
			\| s16
	\| 2		\| 2
	\| '''Initial sample history 2'''		\| '''Initial sample history 2'''
	\|-		\|-
	\| 0x44		\| 0x44
			\| u16
	\| 2		\| 2
	\| '''Loop context predictor/scale'''		\| '''Loop context predictor/scale'''
	\|-		\|-
	\| 0x46		\| 0x46
			\| s16
	\| 2		\| 2
	\| '''Loop context sample history 1'''		\| '''Loop context sample history 1'''
	\|-		\|-
	\| 0x48		\| 0x48
			\| s16
	\| 2		\| 2
	\| '''Loop context sample history 2'''		\| '''Loop context sample history 2'''
	\|-		\|-
	\| 0x4A		\| 0x4A
			\| u16[11]
	\| 2 × 11		\| 2 × 11
	\| '''Reserved'''		\| '''Reserved'''

>Aruki: Removing filedone template. Should we keep that template around so we can have a category for fully documented formats?

2015-01-28T17:01:19Z

Removing filedone template. Should we keep that template around so we can have a category for fully documented formats?

← Older revision		Revision as of 17:01, 28 January 2015
Line 1:		Line 1:
	The '''.dsp format''' is a common GameCube/Wii format for audio that comes with the SDK. It encodes sound using Nintendo's ADPCM codec. The same ADPCM codec is also embedded into several Retro Studios format, like [[AGSC (File Format)\|AGSC]]; the [[CSMP (File Format)\|CSMP]] format actually embeds the entire DSP format within it.		The '''.dsp format''' is a common GameCube/Wii format for audio that comes with the SDK. It encodes sound using Nintendo's ADPCM codec. The same ADPCM codec is also embedded into several Retro Studios format, like [[AGSC (File Format)\|AGSC]]; the [[CSMP (File Format)\|CSMP]] format actually embeds the entire DSP format within it.

	~~{{Filedone}}~~

	{{todo\|An explanation of how ADPCM works would be nice to have somewhere on this page. Also, a better text explanation for the decoding process to go along with the example code.}}		{{todo\|An explanation of how ADPCM works would be nice to have somewhere on this page. Also, a better text explanation for the decoding process to go along with the example code.}}

>Aruki: /* Header */

2015-01-26T03:34:21Z

Header

← Older revision		Revision as of 03:34, 26 January 2015
Line 83:		Line 83:
	\|-		\|-
	\| 0x60		\| 0x60
	\| colspan=2 \| End of DSP header		\| colspan=2 {{unknown\|End of DSP header}}
	\|}		\|}

>MrSinistar: Added completed file format notice

2015-01-25T21:42:15Z

Added completed file format notice

← Older revision		Revision as of 21:42, 25 January 2015
Line 1:		Line 1:
	The '''.dsp format''' is a common GameCube/Wii format for audio that comes with the SDK. It encodes sound using Nintendo's ADPCM codec. The same ADPCM codec is also embedded into several Retro Studios format, like [[AGSC (File Format)\|AGSC]]; the [[CSMP (File Format)\|CSMP]] format actually embeds the entire DSP format within it.		The '''.dsp format''' is a common GameCube/Wii format for audio that comes with the SDK. It encodes sound using Nintendo's ADPCM codec. The same ADPCM codec is also embedded into several Retro Studios format, like [[AGSC (File Format)\|AGSC]]; the [[CSMP (File Format)\|CSMP]] format actually embeds the entire DSP format within it.

			{{Filedone}}

	{{todo\|An explanation of how ADPCM works would be nice to have somewhere on this page. Also, a better text explanation for the decoding process to go along with the example code.}}		{{todo\|An explanation of how ADPCM works would be nice to have somewhere on this page. Also, a better text explanation for the decoding process to go along with the example code.}}

>Aruki at 13:39, 25 January 2015

2015-01-25T13:39:19Z

← Older revision		Revision as of 13:39, 25 January 2015
Line 18:		Line 18:
	\| 0x4		\| 0x4
	\| 4		\| 4
	\| '''ADPCM nibble count'''		\| '''ADPCM nibble count'''; includes frame headers
	\|-		\|-
	\| 0x8		\| 0x8
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	== ADPCM Data ==		== ADPCM Data ==

	The ADPCM audio data is split up into multiple ''frames''. Each frame is 8 bytes; it starts with a one-byte header, then has 7 bytes (or 14 samples) of audio data. For each frame, the bottom 4 bits are the scale value, and the top 4 bits are the coefficient index to use for the current frame.		The ADPCM audio data is split up into multiple ''frames''. Each frame is 8 bytes; it starts with a one-byte header, then has 7 bytes (or 14 samples) of audio data. For each frame header, the bottom 4 bits are the scale value, and the top 4 bits are the coefficient index to use for the current frame.

	=== Example C Decoding Function ===		=== Example C Decoding Function ===
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	u16 scale = 1 << (header & 0xF);		u16 scale = 1 << (header & 0xF);
	u8 coef_index = (header >> 4);		u8 coef_index = (header >> 4);
	s16 coef1 = d.coefs[coef_index * 2];		s16 coef1 = d.coefs[coef_index][0];
	s16 coef2 = d.coefs[coef_index * 2 + 1];		s16 coef2 = d.coefs[coef_index][1];

	// 7 bytes per frame		// 7 bytes per frame

>Aruki at 12:41, 25 January 2015

2015-01-25T12:41:36Z

← Older revision		Revision as of 12:41, 25 January 2015
Line 1:		Line 1:
	The '''.dsp format''' is a common GameCube/Wii format for audio that comes with the SDK. It encodes sound using Nintendo's ADPCM codec. The same ADPCM codec is also embedded into several Retro Studios format, like [[AGSC (File Format)\|AGSC]]; the [[CSMP (File Format)\|CSMP]] format actually embeds the entire DSP format within it.		The '''.dsp format''' is a common GameCube/Wii format for audio that comes with the SDK. It encodes sound using Nintendo's ADPCM codec. The same ADPCM codec is also embedded into several Retro Studios format, like [[AGSC (File Format)\|AGSC]]; the [[CSMP (File Format)\|CSMP]] format actually embeds the entire DSP format within it.

			{{todo\|An explanation of how ADPCM works would be nice to have somewhere on this page. Also, a better text explanation for the decoding process to go along with the example code.}}

	__TOC__		__TOC__

>Aruki: /* Header */

2015-01-24T18:20:35Z

Header

← Older revision		Revision as of 18:20, 24 January 2015
Line 76:		Line 76:
	\| 0x4A		\| 0x4A
	\| 2 × 11		\| 2 × 11
	\| '''~~Padding~~'''		\| '''Reserved'''
	\|-		\|-
	\| 0x60		\| 0x60