CSND Shared Memory - Revision history

Fincs at 20:35, 15 April 2015

2015-04-15T18:35:19Z

← Older revision		Revision as of 22:35, 15 April 2015
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	\| 0xC		\| 0xC
	\| 2		\| 2
	\| Left volume		\| Left channel volume
	\|-		\|-
	\| 0xE		\| 0xE
	\| 2		\| 2
	\| Right volume		\| Right channel volume
	\|-		\|-
	\| 0x10		\| 0x10
	\| ~~0x10~~		\| 2
	\| ~~Usually zero?~~		\| Left capture volume
			\|-
			\| 0x12
			\| 2
			\| Right capture volume
	\|}		\|}

	This sets the playback volumes for the specified channel. This command ~~must be~~ used after command 0x8(user processes use cmd8 a second time before using this command). ~~The parameter values seem to have no affect when not using IMA-ADPCM encoding?~~		This sets the playback and capture volumes for the specified channel. This command is usually used after command 0x8(user processes use cmd8 a second time before using this command).

	==Command 0xA==		==Command 0xA==
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	\| 0x8		\| 0x8
	\| 4		\| 4
	\| See below.		\| See below. (Flags + Timer)
	\|-		\|-
	\| 0xC		\| 0xC
	\| 4		\| 4
	\| See below.		\| See below. (Channel volume)
	\|-		\|-
	\| 0x10		\| 0x10
	\| 4		\| 4
	\| See below. ~~Usually zero?~~		\| See below. (Capture volume)
	\|-		\|-
	\| 0x14		\| 0x14
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	\|-		\|-
	\| 9-7		\| 9-7
	\| ?		\| Ignored
	\|-		\|-
	\| 11-10		\| 11-10
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	\|-		\|-
	\| 15		\| 15
	\| ?		\| Ignored
	\|-		\|-
	\| 31-16		\| 31-16
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	\|-		\|-
	\| 15-0		\| 15-0
	\| Left volume, this value is clamped to the following range(by the user process): 0x0-0x8000.		\| Left channel volume, this value is clamped to the following range(by the user process): 0x0-0x8000.
	\|-		\|-
	\| 31-16		\| 31-16
	\| Right volume, this value is clamped to the following range(by the user process): 0x0-0x8000.		\| Right channel volume, this value is clamped to the following range(by the user process): 0x0-0x8000.
	\|}		\|}

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	\|-		\|-
	\| 15-0		\| 15-0
	\| ~~Unknown~~, this value is clamped to the following range(by the user process): 0x0-0x8000.		\| Left capture volume, this value is clamped to the following range(by the user process): 0x0-0x8000.
	\|-		\|-
	\| 31-16		\| 31-16
	\| ~~Unknown~~, this value is clamped to the following range(by the user process): 0x0-0x8000.		\| Right capture volume, this value is clamped to the following range(by the user process): 0x0-0x8000.
	\|}		\|}

	==Command 0xF==		==Command 0xF==
	~~Unknown~~.		{\| class="wikitable" border="1"
			\|-
			! Index Byte
			! Size
			! Description
			\|-
			\| 0x2
			\| 2
			\| CmdID 0xF
			\|-
			\| 0x8
			\| 4
			\| Flags, as in command 0xE. Only the timer and the start/stop (bit14) bits are used.
			\|-
			\| 0xC
			\| 4
			\| Channel volume, same as in command 0xE.
			\|-
			\| 0x10
			\| 4
			\| Capture volume, same as in command 0xE.
			\|-
			\| 0x14
			\| 4
			\| Duty (see command 0x7).
			\|}

			This channel is similar to command 0xE, but it is tailored for configuring PSG Tone channels (8, 9, 10, 11, 12, 13) as it contains a duty parameter. Channel format is set to PSG.

			==Command 0x10==
			{\| class="wikitable" border="1"
			\|-
			! Index Byte
			! Size
			! Description
			\|-
			\| 0x2
			\| 2
			\| CmdID 0xF
			\|-
			\| 0x8
			\| 4
			\| Flags, as in command 0xE. Only the timer and the start/stop (bit14) bits are used. Channel format is set to PSG.
			\|-
			\| 0xC
			\| 4
			\| Channel volume, same as in command 0xE.
			\|-
			\| 0x10
			\| 4
			\| Capture volume, same as in command 0xE.
			\|}

			This channel is identical to command 0xF except for not having a duty parameter. Presumably used to configure PSG Noise channels (14, 15).

	==Command 0x100==		==Command 0x100==

Plutooo: /* Command 0x104 */

2015-01-05T17:29:08Z

Command 0x104

← Older revision		Revision as of 20:29, 5 January 2015
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	==Command 0x104==		==Command 0x104==
	Sets (u16)(0x1EC03800+16X+4) = Y.		Sets (u16)(0x1EC03800+16X+4) = -Y.

	==Command 0x105==		==Command 0x105==

Fincs: Le copypaste error

2015-01-03T17:47:42Z

Le copypaste error

← Older revision		Revision as of 20:47, 3 January 2015
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	\| 0x2		\| 0x2
	\| 2		\| 2
	\| CmdID ~~0x4~~		\| CmdID 0x5
	\|-		\|-
	\| 0xC		\| 0xC
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	\| 0x2		\| 0x2
	\| 2		\| 2
	\| CmdID ~~0x4~~		\| CmdID 0x6
	\|-		\|-
	\| 0xC		\| 0xC
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	\| 0x2		\| 0x2
	\| 2		\| 2
	\| CmdID ~~0x4~~		\| CmdID 0x7
	\|-		\|-
	\| 0xC		\| 0xC
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	\| 0x2		\| 0x2
	\| 2		\| 2
	\| CmdID ~~0xB~~		\| CmdID 0xC
	\|-		\|-
	\| 0xC		\| 0xC
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	\| 0x2		\| 0x2
	\| 2		\| 2
	\| CmdID ~~0xB~~		\| CmdID 0xD
	\|-		\|-
	\| 0xC		\| 0xC
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	\| 0xC		\| 0xC
	\| 4		\| 4
	\| See below. ~~Usually zero?~~		\| See below.
	\|-		\|-
	\| 0x10		\| 0x10
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	\|-		\|-
	\| 15-0		\| 15-0
	\| ~~Unknown~~, this value is clamped to the following range(by the user process): 0x0-0x8000.		\| Left volume, this value is clamped to the following range(by the user process): 0x0-0x8000.
	\|-		\|-
	\| 31-16		\| 31-16
	\| ~~Unknown~~, this value is clamped to the following range(by the user process): 0x0-0x8000.		\| Right volume, this value is clamped to the following range(by the user process): 0x0-0x8000.
	\|}		\|}

Fincs at 18:12, 3 January 2015

2015-01-03T17:12:39Z

← Older revision		Revision as of 20:12, 3 January 2015
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	\|}		\|}

	This command is used for ~~initializing~~ IMA-ADPCM state(when IMA-ADPCM encoding is used), prior to using command 0xE. [[CSND]] <nowiki>channelslotregister+0x18 = (u16)cmdword[3] \| ((cmdword[4] & 0xFF)<<16)</nowiki>. [[CSND]] channelslotregister+0x1C = 0.		This command is used for setting the IMA-ADPCM state used to play the first block (when IMA-ADPCM encoding is used), prior to using command 0xE. [[CSND]] <nowiki>channelslotregister+0x18 = (u16)cmdword[3] \| ((cmdword[4] & 0xFF)<<16)</nowiki>. [[CSND]] channelslotregister+0x1C = 0.

	==Command 0xC==		==Command 0xC==
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	\|}		\|}

	This is used for ~~initializing looping~~ state ~~for~~ IMA-ADPCM encoding. <nowiki>channelslotregister+~~0x18~~ = (1<<31) \| (u16)cmdword[3] \| ((cmdword[4] & 0xFF)<<16)</nowiki>.		This is used for setting the IMA-ADPCM state used to play the second block (when IMA-ADPCM encoding is used). <nowiki>channelslotregister+0x1C = (1<<31) \| (u16)cmdword[3] \| ((cmdword[4] & 0xFF)<<16)</nowiki>.

	==Command 0xD==		==Command 0xD==
	~~Unknown~~.		{\| class="wikitable" border="1"
			\|-
			! Index Byte
			! Size
			! Description
			\|-
			\| 0x2
			\| 2
			\| CmdID 0xB
			\|-
			\| 0xC
			\| 1
			\| 0 = disable ADPCM state reload for the second block, 1 = enable.
			\|}

			This command configures bit31 of <nowiki>channelslotregister+0x1C</nowiki>. This bit indicates whether the hardware will load ADPCM state from said register everytime the second block is to be played; or if it will continue using the same state used for the previously emitted sample.

	==Command 0xE==		==Command 0xE==
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	\|}		\|}

	This initializes the [[CSND]] channel registers located at: 0x1EC03400 + (channel_index*0x20). It is unknown if stereo samples are supported. ~~When looping is disabled~~, the hardware plays the first block and then stops. When looping is enabled, the hardware plays the first block once and then repeats the second forever. Before playing a block, the hardware reads the corresponding address register in order to know where it is located. The block size is either read only once at the beginning or before each block (~~this is controlled by bit11 of word 0x8~~).		This initializes the [[CSND]] channel registers located at: 0x1EC03400 + (channel_index*0x20). It is unknown if stereo samples are supported. In manual mode, the hardware plays the audio data of the first block endlessly ignoring the size field. In one-shot mode, the hardware plays the first block with the specified size and then stops. When looping is enabled, the hardware plays the first block once and then repeats the second forever. Before playing a block, the hardware reads the corresponding address register in order to know where it is located. The block size is either read only once at the beginning (mode 3) or before each block (mode 1, normal looping).

	===Parameter word 0x8===		===Parameter word 0x8===
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	\| ?		\| ?
	\|-		\|-
	\| 10		\| 11-10
	\| 0 = ~~disable~~ looping (one-shot ~~sample)~~, 1 = ~~enable~~ looping.		\| Repeat mode: 0 = manual, 1 = normal looping, 2 = one-shot, 3 = looping with constant block size.
	\|-
	~~\| 11~~
	~~\| 0 = read the block size before each block, 1 = read the~~ block size ~~only once~~.
	\|-		\|-
	\| 13-12		\| 13-12
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	Bits 0 through 5 are written as zero to the CNT register.		Bits 0 through 5 are written as zero to the CNT register.

	PSG: Channels 8 through 13 play a square tone that is 16 samples long. Channels 14 and 15 play noise. ~~It is currently unknown how to set the~~ duty of the square tones.		PSG: Channels 8 through 13 play a square tone that is 32 samples long. Channels 14 and 15 play noise. The duty of the square tones is set using command 0x7.

	===Parameter word 0xC===		===Parameter word 0xC===

Fincs at 13:25, 3 January 2015

2015-01-03T12:25:50Z

← Older revision		Revision as of 15:25, 3 January 2015
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	\| 0xC		\| 0xC
	\| 1		\| 1
	\| ~~Value~~		\| Duty value (3 bits), see below
	\|-		\|-
	\| 0x10		\| 0x10
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	\|}		\|}

	This ~~is similar to cmd2, except this~~ updates channel CNT ~~bit1~~-~~bit0~~.		This command updates bit0 through (at least) bit2 of the channel's CNT register. These bits control the duty of a PSG square wave:

			0 12.5% "_______-_______-_______-"
			1 25.0% "______--______--______--"
			2 37.5% "_____---_____---_____---"
			3 50.0% "____----____----____----"
			4 62.5% "___-----___-----___-----"
			5 75.0% "__------__------__------"
			6 87.5% "_-------_-------_-------"
			7 0.0% "________________________"

	==Command 0x8==		==Command 0x8==
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	\| Sample rate clamped to the following range(by the user process): 0x42-0xFFFF. This is the same value used with Cmd 0x8, except clamped.		\| Sample rate clamped to the following range(by the user process): 0x42-0xFFFF. This is the same value used with Cmd 0x8, except clamped.
	\|}		\|}

			Bits 0 through 5 are written as zero to the CNT register.

	PSG: Channels 8 through 13 play a square tone that is 16 samples long. Channels 14 and 15 play noise. It is currently unknown how to set the duty of the square tones.		PSG: Channels 8 through 13 play a square tone that is 16 samples long. Channels 14 and 15 play noise. It is currently unknown how to set the duty of the square tones.

Fincs at 22:03, 2 January 2015

2015-01-02T21:03:50Z

← Older revision		Revision as of 00:03, 3 January 2015
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	\|-		\|-
	\| 11		\| 11
	\| 0 = read the block size ~~only once~~, 1 = read the block size ~~before each block~~.		\| 0 = read the block size before each block, 1 = read the block size only once.
	\|-		\|-
	\| 13-12		\| 13-12

Fincs at 22:01, 2 January 2015

2015-01-02T21:01:00Z

← Older revision		Revision as of 00:01, 3 January 2015
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	\|}		\|}

	This sets the address and size of the second block of an audio channel. The CSND module writes these fields to the channel [[CSND\|register]] for the physical address of the second block and the register for the block size~~. The CSND module also sets to zero the address of the first block (working hypothesis)~~.		This sets the address and size of the second block of an audio channel. The CSND module writes these fields to the channel [[CSND\|register]] for the physical address of the second block and the register for the block size.

	==Command 0x4==		==Command 0x4==
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	\| 0xC		\| 0xC
	\| 4		\| 4
	\| Physical address of the ~~second~~ block of audio data		\| Physical address of the first block of audio data
	\|-		\|-
	\| 0x10		\| 0x10
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	\|}		\|}

	This sets the address and size of the first block of an audio channel. The CSND module writes these fields to the channel [[CSND\|register]] for the physical address of the first block and the register for the block size~~. The CSND module also sets to zero the address of the second block (working hypothesis)~~.		This sets the address and size of the first block of an audio channel. The CSND module writes these fields to the channel [[CSND\|register]] for the physical address of the first block and the register for the block size.

	==Command 0xB==		==Command 0xB==
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	\| 0x1C		\| 0x1C
	\| 4		\| 4
	\| Total byte-size ~~for the audio data to play~~.		\| Total byte-size of one block.
	\|}		\|}

	This initializes the [[CSND]] channel registers located at: 0x1EC03400 + (channel_index*0x20). It is unknown if stereo samples are supported. When looping is disabled, the hardware plays the first block and then stops. When looping is enabled, the hardware plays ~~blocks continuously, either alternating between them (first, second, first, etc) or playing~~ the first once and then ~~repeating~~ the second forever ~~(this is controlled by bit11 of word 0x8)~~. Before playing ~~any~~ block, the hardware reads the corresponding address ~~register and the byte-size~~ register in order to know ~~how many samples must be played and~~ where ~~are they~~ located.		This initializes the [[CSND]] channel registers located at: 0x1EC03400 + (channel_index*0x20). It is unknown if stereo samples are supported. When looping is disabled, the hardware plays the first block and then stops. When looping is enabled, the hardware plays the first block once and then repeats the second forever. Before playing a block, the hardware reads the corresponding address register in order to know where it is located. The block size is either read only once at the beginning or before each block (this is controlled by bit11 of word 0x8).

	===Parameter word 0x8===		===Parameter word 0x8===
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	\|-		\|-
	\| 11		\| 11
	\| 0 = ~~do not alternate between blocks~~, 1 = ~~alternate between blocks~~		\| 0 = read the block size only once, 1 = read the block size before each block.
	\|-		\|-
	\| 13-12		\| 13-12

Fincs at 21:26, 2 January 2015

2015-01-02T20:26:36Z

← Older revision		Revision as of 23:26, 2 January 2015
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	\| 0xC		\| 0xC
	\| 4		\| 4
	\| Physical address of the ~~first~~ audio ~~sample in the loop.~~		\| Physical address of the second block of audio data
	\|-		\|-
	\| 0x10		\| 0x10
	\| 4		\| 4
	\| Total byte-size of the ~~loop sample-data.~~		\| Total byte-size of the block
	\|}		\|}

	This ~~initializes state for looping, when looping is used. This command is used immediately after command 0x8~~. CSND module writes these fields to the channel [[CSND\|register]] for the ~~second~~ physical-address, and the ~~channel~~ register for the ~~byte-~~size.		This sets the address and size of the second block of an audio channel. The CSND module writes these fields to the channel [[CSND\|register]] for the physical address of the second block and the register for the block size. The CSND module also sets to zero the address of the first block (working hypothesis).

	==Command 0x4==		==Command 0x4==
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	\| 0xC		\| 0xC
	\| 4		\| 4
	\| ~~Main physical~~ address		\| Physical address of the second block of audio data
	\|-		\|-
	\| 0x10		\| 0x10
	\| 0x4		\| 0x4
	\| ~~Audio data~~ byte-size		\| Total byte-size of the block
	\|-		\|-
	\| 0x14		\| 0x14
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	\|}		\|}

	~~Like command 0xE, this~~ writes ~~the specified parameters~~ to the [[CSND]] ~~channel slot registers~~ for the ~~main audio-data~~ physical address, and the register for the ~~data byte-~~size.		This sets the address and size of the first block of an audio channel. The CSND module writes these fields to the channel [[CSND\|register]] for the physical address of the first block and the register for the block size. The CSND module also sets to zero the address of the second block (working hypothesis).

	==Command 0xB==		==Command 0xB==
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	\| 0x14		\| 0x14
	\| 4		\| 4
	\| Physical address for the ~~beginning~~ of ~~the~~ audio data.		\| Physical address for the first block of audio data.
	\|-		\|-
	\| 0x18		\| 0x18
	\| 4		\| 4
	\| Physical address for the ~~loop point~~ of ~~the sample~~.		\| Physical address for the second block of audio data.
	\|-		\|-
	\| 0x1C		\| 0x1C
	\| 4		\| 4
	\| Total byte-size for the audio data ~~(one-shot), for the looped section (looped)~~		\| Total byte-size for the audio data to play.
	\|}		\|}

	This initializes the [[CSND]] channel registers located at: 0x1EC03400 + (channel_index*0x20). It is unknown ~~how to use~~ stereo samples. When looping is enabled, ~~audio playback initially begins with~~ playing ~~from~~ the first ~~physical address~~ (~~its length depends on bit14~~ of ~~parameter~~ 0x8~~, see below~~). ~~Once the initial audio playback finishes~~, the ~~looped section begins at~~ the ~~second physical~~ address~~. The length of the loop is~~ the byte-size ~~specified at 0x1C~~.		This initializes the [[CSND]] channel registers located at: 0x1EC03400 + (channel_index*0x20). It is unknown if stereo samples are supported. When looping is disabled, the hardware plays the first block and then stops. When looping is enabled, the hardware plays blocks continuously, either alternating between them (first, second, first, etc) or playing the first once and then repeating the second forever (this is controlled by bit11 of word 0x8). Before playing any block, the hardware reads the corresponding address register and the byte-size register in order to know how many samples must be played and where are they located.

	===Parameter word 0x8===		===Parameter word 0x8===
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	\|-		\|-
	\| 11		\| 11
	\| ?		\| 0 = do not alternate between blocks, 1 = alternate between blocks
	\|-		\|-
	\| 13-12		\| 13-12
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	\|-		\|-
	\| 14		\| 14
	\| 0 = ~~the non-looped section has the same length as the looped section~~, 1 = ~~the non-looped section has length address2 - address1~~		\| 0 = disable playback, 1 = enable playback
	\|-		\|-
	\| 15		\| 15

Fincs at 19:08, 2 January 2015

2015-01-02T18:08:37Z

← Older revision		Revision as of 21:08, 2 January 2015
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	\| 0x14		\| 0x14
	\| 4		\| 4
	\| Physical address for the audio data~~, for the main channel~~.		\| Physical address for the beginning of the audio data.
	\|-		\|-
	\| 0x18		\| 0x18
	\| 4		\| 4
	\| Physical address for the ~~audio data, for~~ the ~~second channel(only needs set if a flag is set which enables using this address)~~.		\| Physical address for the loop point of the sample.
	\|-		\|-
	\| 0x1C		\| 0x1C
	\| 4		\| 4
	\| Total byte-size for the audio data.		\| Total byte-size for the audio data (one-shot), for the looped section (looped)
	\|}		\|}

	This initializes the [[CSND]] channel registers located at: 0x1EC03400 + (channel_index*0x20). ~~Whether mono/stereo audio is used~~ is ~~determined via an~~ unknown ~~flag~~. When looping is ~~used~~, audio playback initially begins with playing from the first physical address(~~using the byte-size from the channel register when audio playback was triggered~~). Once ~~looping begins after~~ the initial audio playback finishes, the second physical address ~~is used for the beginning~~ of the ~~audio data instead(using~~ the ~~same~~ byte-size ~~used with the initial audio playback)~~.		This initializes the [[CSND]] channel registers located at: 0x1EC03400 + (channel_index*0x20). It is unknown how to use stereo samples. When looping is enabled, audio playback initially begins with playing from the first physical address (its length depends on bit14 of parameter 0x8, see below). Once the initial audio playback finishes, the looped section begins at the second physical address. The length of the loop is the byte-size specified at 0x1C.

	===Parameter word 0x8===		===Parameter word 0x8===
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	\|-		\|-
	\| 6		\| 6
	\| 0 = disable linear interpolation, 1 = enable linear interpolation		\| 0 = disable linear interpolation, 1 = enable linear interpolation.
	\|-		\|-
	\| 9-7		\| 9-7
	\| ?		\| ?
	\|-		\|-
	\| ~~11-~~10		\| 10
	\| 1 = ~~enable~~ looping, 2 = ~~disable~~ looping.		\| 0 = disable looping (one-shot sample), 1 = enable looping.
			\|-
			\| 11
			\| ?
	\|-		\|-
	\| 13-12		\| 13-12
	\| This sets the encoding, some of the names for the following encodings are from [https://github.com/3dshax/ctr/blob/master/ctrtool/cwav.h here]. 0 = PCM8, 1 = PCM16, 2 = IMA-ADPCM. 3 = PSG, similar to DS.		\| This sets the encoding, some of the names for the following encodings are from [https://github.com/3dshax/ctr/blob/master/ctrtool/cwav.h here]. 0 = PCM8, 1 = PCM16, 2 = IMA-ADPCM. 3 = PSG, similar to DS.
	\|-		\|-
	\| 15~~-14~~		\| 14
	\| ? ~~(set this to 1 for proper looping)~~		\| 0 = the non-looped section has the same length as the looped section, 1 = the non-looped section has length address2 - address1
			\|-
			\| 15
			\| ?
	\|-		\|-
	\| 31-16		\| 31-16

Fincs at 18:31, 2 January 2015

2015-01-02T17:31:10Z

← Older revision		Revision as of 20:31, 2 January 2015
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	\| Channel index		\| Channel index
	\|-		\|-
	\| 9-6		\| 6
			\| 0 = disable linear interpolation, 1 = enable linear interpolation
			\|-
			\| 9-7
	\| ?		\| ?
	\|-		\|-
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	\|-		\|-
	\| 13-12		\| 13-12
	\| This sets the encoding, some of the names for the following encodings are from [https://github.com/3dshax/ctr/blob/master/ctrtool/cwav.h here]. 0 = PCM8, 1 = PCM16, 2 = IMA-ADPCM. 3 = PSG, similar to DS?		\| This sets the encoding, some of the names for the following encodings are from [https://github.com/3dshax/ctr/blob/master/ctrtool/cwav.h here]. 0 = PCM8, 1 = PCM16, 2 = IMA-ADPCM. 3 = PSG, similar to DS.
	\|-		\|-
	\| 15-14		\| 15-14
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	\| Sample rate clamped to the following range(by the user process): 0x42-0xFFFF. This is the same value used with Cmd 0x8, except clamped.		\| Sample rate clamped to the following range(by the user process): 0x42-0xFFFF. This is the same value used with Cmd 0x8, except clamped.
	\|}		\|}

			PSG: Channels 8 through 13 play a square tone that is 16 samples long. Channels 14 and 15 play noise. It is currently unknown how to set the duty of the square tones.

	===Parameter word 0xC===		===Parameter word 0xC===