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e6ce8a28c7
The UMP 1.1 spec says that an RPN/NRPN should be sent when one of the following occurs: * a CC 38 is received * a subsequent CC 6 is received * a CC 98, 99, 100, and 101 is received, indicating the last RPN/NRPN message has ended and a new one has started That said, we should send a partial data even if it's not fully filled. Let's change the UMP conversion helper code to follow that rule. Link: https://patch.msgid.link/20240731130528.12600-2-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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#ifndef __SOUND_UMP_CONVERT_H
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#define __SOUND_UMP_CONVERT_H
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#include <sound/ump_msg.h>
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/* context for converting from legacy control messages to UMP packet */
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struct ump_cvt_to_ump_bank {
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bool rpn_set;
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bool nrpn_set;
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bool bank_set;
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unsigned char cc_rpn_msb, cc_rpn_lsb;
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unsigned char cc_nrpn_msb, cc_nrpn_lsb;
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unsigned char cc_data_msb, cc_data_lsb;
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unsigned char cc_bank_msb, cc_bank_lsb;
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bool cc_data_msb_set, cc_data_lsb_set;
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};
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/* context for converting from MIDI1 byte stream to UMP packet */
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struct ump_cvt_to_ump {
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/* MIDI1 intermediate buffer */
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unsigned char buf[4];
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int len;
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int cmd_bytes;
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/* UMP output packet */
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u32 ump[4];
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int ump_bytes;
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/* various status */
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unsigned int in_sysex;
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struct ump_cvt_to_ump_bank bank[16]; /* per channel */
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};
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int snd_ump_convert_from_ump(const u32 *data, unsigned char *dst,
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unsigned char *group_ret);
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void snd_ump_convert_to_ump(struct ump_cvt_to_ump *cvt, unsigned char group,
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unsigned int protocol, unsigned char c);
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/* reset the converter context, called at each open to ump */
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static inline void snd_ump_convert_reset(struct ump_cvt_to_ump *ctx)
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{
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memset(ctx, 0, sizeof(*ctx));
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}
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#endif /* __SOUND_UMP_CONVERT_H */
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