From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- sound/core/seq/seq_midi_event.c | 459 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 459 insertions(+) create mode 100644 sound/core/seq/seq_midi_event.c (limited to 'sound/core/seq/seq_midi_event.c') diff --git a/sound/core/seq/seq_midi_event.c b/sound/core/seq/seq_midi_event.c new file mode 100644 index 000000000..7511462fe --- /dev/null +++ b/sound/core/seq/seq_midi_event.c @@ -0,0 +1,459 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * MIDI byte <-> sequencer event coder + * + * Copyright (C) 1998,99 Takashi Iwai , + * Jaroslav Kysela + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +MODULE_AUTHOR("Takashi Iwai , Jaroslav Kysela "); +MODULE_DESCRIPTION("MIDI byte <-> sequencer event coder"); +MODULE_LICENSE("GPL"); + +/* event type, index into status_event[] */ +/* from 0 to 6 are normal commands (note off, on, etc.) for 0x9?-0xe? */ +#define ST_INVALID 7 +#define ST_SPECIAL 8 +#define ST_SYSEX ST_SPECIAL +/* from 8 to 15 are events for 0xf0-0xf7 */ + + +/* + * prototypes + */ +static void note_event(struct snd_midi_event *dev, struct snd_seq_event *ev); +static void one_param_ctrl_event(struct snd_midi_event *dev, struct snd_seq_event *ev); +static void pitchbend_ctrl_event(struct snd_midi_event *dev, struct snd_seq_event *ev); +static void two_param_ctrl_event(struct snd_midi_event *dev, struct snd_seq_event *ev); +static void one_param_event(struct snd_midi_event *dev, struct snd_seq_event *ev); +static void songpos_event(struct snd_midi_event *dev, struct snd_seq_event *ev); +static void note_decode(struct snd_seq_event *ev, unsigned char *buf); +static void one_param_decode(struct snd_seq_event *ev, unsigned char *buf); +static void pitchbend_decode(struct snd_seq_event *ev, unsigned char *buf); +static void two_param_decode(struct snd_seq_event *ev, unsigned char *buf); +static void songpos_decode(struct snd_seq_event *ev, unsigned char *buf); + +/* + * event list + */ +static struct status_event_list { + int event; + int qlen; + void (*encode)(struct snd_midi_event *dev, struct snd_seq_event *ev); + void (*decode)(struct snd_seq_event *ev, unsigned char *buf); +} status_event[] = { + /* 0x80 - 0xef */ + {SNDRV_SEQ_EVENT_NOTEOFF, 2, note_event, note_decode}, + {SNDRV_SEQ_EVENT_NOTEON, 2, note_event, note_decode}, + {SNDRV_SEQ_EVENT_KEYPRESS, 2, note_event, note_decode}, + {SNDRV_SEQ_EVENT_CONTROLLER, 2, two_param_ctrl_event, two_param_decode}, + {SNDRV_SEQ_EVENT_PGMCHANGE, 1, one_param_ctrl_event, one_param_decode}, + {SNDRV_SEQ_EVENT_CHANPRESS, 1, one_param_ctrl_event, one_param_decode}, + {SNDRV_SEQ_EVENT_PITCHBEND, 2, pitchbend_ctrl_event, pitchbend_decode}, + /* invalid */ + {SNDRV_SEQ_EVENT_NONE, -1, NULL, NULL}, + /* 0xf0 - 0xff */ + {SNDRV_SEQ_EVENT_SYSEX, 1, NULL, NULL}, /* sysex: 0xf0 */ + {SNDRV_SEQ_EVENT_QFRAME, 1, one_param_event, one_param_decode}, /* 0xf1 */ + {SNDRV_SEQ_EVENT_SONGPOS, 2, songpos_event, songpos_decode}, /* 0xf2 */ + {SNDRV_SEQ_EVENT_SONGSEL, 1, one_param_event, one_param_decode}, /* 0xf3 */ + {SNDRV_SEQ_EVENT_NONE, -1, NULL, NULL}, /* 0xf4 */ + {SNDRV_SEQ_EVENT_NONE, -1, NULL, NULL}, /* 0xf5 */ + {SNDRV_SEQ_EVENT_TUNE_REQUEST, 0, NULL, NULL}, /* 0xf6 */ + {SNDRV_SEQ_EVENT_NONE, -1, NULL, NULL}, /* 0xf7 */ + {SNDRV_SEQ_EVENT_CLOCK, 0, NULL, NULL}, /* 0xf8 */ + {SNDRV_SEQ_EVENT_NONE, -1, NULL, NULL}, /* 0xf9 */ + {SNDRV_SEQ_EVENT_START, 0, NULL, NULL}, /* 0xfa */ + {SNDRV_SEQ_EVENT_CONTINUE, 0, NULL, NULL}, /* 0xfb */ + {SNDRV_SEQ_EVENT_STOP, 0, NULL, NULL}, /* 0xfc */ + {SNDRV_SEQ_EVENT_NONE, -1, NULL, NULL}, /* 0xfd */ + {SNDRV_SEQ_EVENT_SENSING, 0, NULL, NULL}, /* 0xfe */ + {SNDRV_SEQ_EVENT_RESET, 0, NULL, NULL}, /* 0xff */ +}; + +static int extra_decode_ctrl14(struct snd_midi_event *dev, unsigned char *buf, int len, + struct snd_seq_event *ev); +static int extra_decode_xrpn(struct snd_midi_event *dev, unsigned char *buf, int count, + struct snd_seq_event *ev); + +static struct extra_event_list { + int event; + int (*decode)(struct snd_midi_event *dev, unsigned char *buf, int len, + struct snd_seq_event *ev); +} extra_event[] = { + {SNDRV_SEQ_EVENT_CONTROL14, extra_decode_ctrl14}, + {SNDRV_SEQ_EVENT_NONREGPARAM, extra_decode_xrpn}, + {SNDRV_SEQ_EVENT_REGPARAM, extra_decode_xrpn}, +}; + +/* + * new/delete record + */ + +int snd_midi_event_new(int bufsize, struct snd_midi_event **rdev) +{ + struct snd_midi_event *dev; + + *rdev = NULL; + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (dev == NULL) + return -ENOMEM; + if (bufsize > 0) { + dev->buf = kmalloc(bufsize, GFP_KERNEL); + if (dev->buf == NULL) { + kfree(dev); + return -ENOMEM; + } + } + dev->bufsize = bufsize; + dev->lastcmd = 0xff; + dev->type = ST_INVALID; + spin_lock_init(&dev->lock); + *rdev = dev; + return 0; +} +EXPORT_SYMBOL(snd_midi_event_new); + +void snd_midi_event_free(struct snd_midi_event *dev) +{ + if (dev != NULL) { + kfree(dev->buf); + kfree(dev); + } +} +EXPORT_SYMBOL(snd_midi_event_free); + +/* + * initialize record + */ +static inline void reset_encode(struct snd_midi_event *dev) +{ + dev->read = 0; + dev->qlen = 0; + dev->type = ST_INVALID; +} + +void snd_midi_event_reset_encode(struct snd_midi_event *dev) +{ + unsigned long flags; + + spin_lock_irqsave(&dev->lock, flags); + reset_encode(dev); + spin_unlock_irqrestore(&dev->lock, flags); +} +EXPORT_SYMBOL(snd_midi_event_reset_encode); + +void snd_midi_event_reset_decode(struct snd_midi_event *dev) +{ + unsigned long flags; + + spin_lock_irqsave(&dev->lock, flags); + dev->lastcmd = 0xff; + spin_unlock_irqrestore(&dev->lock, flags); +} +EXPORT_SYMBOL(snd_midi_event_reset_decode); + +void snd_midi_event_no_status(struct snd_midi_event *dev, int on) +{ + dev->nostat = on ? 1 : 0; +} +EXPORT_SYMBOL(snd_midi_event_no_status); + +/* + * read one byte and encode to sequencer event: + * return true if MIDI bytes are encoded to an event + * false data is not finished + */ +bool snd_midi_event_encode_byte(struct snd_midi_event *dev, unsigned char c, + struct snd_seq_event *ev) +{ + bool rc = false; + unsigned long flags; + + if (c >= MIDI_CMD_COMMON_CLOCK) { + /* real-time event */ + ev->type = status_event[ST_SPECIAL + c - 0xf0].event; + ev->flags &= ~SNDRV_SEQ_EVENT_LENGTH_MASK; + ev->flags |= SNDRV_SEQ_EVENT_LENGTH_FIXED; + return ev->type != SNDRV_SEQ_EVENT_NONE; + } + + spin_lock_irqsave(&dev->lock, flags); + if ((c & 0x80) && + (c != MIDI_CMD_COMMON_SYSEX_END || dev->type != ST_SYSEX)) { + /* new command */ + dev->buf[0] = c; + if ((c & 0xf0) == 0xf0) /* system messages */ + dev->type = (c & 0x0f) + ST_SPECIAL; + else + dev->type = (c >> 4) & 0x07; + dev->read = 1; + dev->qlen = status_event[dev->type].qlen; + } else { + if (dev->qlen > 0) { + /* rest of command */ + dev->buf[dev->read++] = c; + if (dev->type != ST_SYSEX) + dev->qlen--; + } else { + /* running status */ + dev->buf[1] = c; + dev->qlen = status_event[dev->type].qlen - 1; + dev->read = 2; + } + } + if (dev->qlen == 0) { + ev->type = status_event[dev->type].event; + ev->flags &= ~SNDRV_SEQ_EVENT_LENGTH_MASK; + ev->flags |= SNDRV_SEQ_EVENT_LENGTH_FIXED; + if (status_event[dev->type].encode) /* set data values */ + status_event[dev->type].encode(dev, ev); + if (dev->type >= ST_SPECIAL) + dev->type = ST_INVALID; + rc = true; + } else if (dev->type == ST_SYSEX) { + if (c == MIDI_CMD_COMMON_SYSEX_END || + dev->read >= dev->bufsize) { + ev->flags &= ~SNDRV_SEQ_EVENT_LENGTH_MASK; + ev->flags |= SNDRV_SEQ_EVENT_LENGTH_VARIABLE; + ev->type = SNDRV_SEQ_EVENT_SYSEX; + ev->data.ext.len = dev->read; + ev->data.ext.ptr = dev->buf; + if (c != MIDI_CMD_COMMON_SYSEX_END) + dev->read = 0; /* continue to parse */ + else + reset_encode(dev); /* all parsed */ + rc = true; + } + } + + spin_unlock_irqrestore(&dev->lock, flags); + return rc; +} +EXPORT_SYMBOL(snd_midi_event_encode_byte); + +/* encode note event */ +static void note_event(struct snd_midi_event *dev, struct snd_seq_event *ev) +{ + ev->data.note.channel = dev->buf[0] & 0x0f; + ev->data.note.note = dev->buf[1]; + ev->data.note.velocity = dev->buf[2]; +} + +/* encode one parameter controls */ +static void one_param_ctrl_event(struct snd_midi_event *dev, struct snd_seq_event *ev) +{ + ev->data.control.channel = dev->buf[0] & 0x0f; + ev->data.control.value = dev->buf[1]; +} + +/* encode pitch wheel change */ +static void pitchbend_ctrl_event(struct snd_midi_event *dev, struct snd_seq_event *ev) +{ + ev->data.control.channel = dev->buf[0] & 0x0f; + ev->data.control.value = (int)dev->buf[2] * 128 + (int)dev->buf[1] - 8192; +} + +/* encode midi control change */ +static void two_param_ctrl_event(struct snd_midi_event *dev, struct snd_seq_event *ev) +{ + ev->data.control.channel = dev->buf[0] & 0x0f; + ev->data.control.param = dev->buf[1]; + ev->data.control.value = dev->buf[2]; +} + +/* encode one parameter value*/ +static void one_param_event(struct snd_midi_event *dev, struct snd_seq_event *ev) +{ + ev->data.control.value = dev->buf[1]; +} + +/* encode song position */ +static void songpos_event(struct snd_midi_event *dev, struct snd_seq_event *ev) +{ + ev->data.control.value = (int)dev->buf[2] * 128 + (int)dev->buf[1]; +} + +/* + * decode from a sequencer event to midi bytes + * return the size of decoded midi events + */ +long snd_midi_event_decode(struct snd_midi_event *dev, unsigned char *buf, long count, + struct snd_seq_event *ev) +{ + unsigned int cmd, type; + + if (ev->type == SNDRV_SEQ_EVENT_NONE) + return -ENOENT; + + for (type = 0; type < ARRAY_SIZE(status_event); type++) { + if (ev->type == status_event[type].event) + goto __found; + } + for (type = 0; type < ARRAY_SIZE(extra_event); type++) { + if (ev->type == extra_event[type].event) + return extra_event[type].decode(dev, buf, count, ev); + } + return -ENOENT; + + __found: + if (type >= ST_SPECIAL) + cmd = 0xf0 + (type - ST_SPECIAL); + else + /* data.note.channel and data.control.channel is identical */ + cmd = 0x80 | (type << 4) | (ev->data.note.channel & 0x0f); + + + if (cmd == MIDI_CMD_COMMON_SYSEX) { + snd_midi_event_reset_decode(dev); + return snd_seq_expand_var_event(ev, count, buf, 1, 0); + } else { + int qlen; + unsigned char xbuf[4]; + unsigned long flags; + + spin_lock_irqsave(&dev->lock, flags); + if ((cmd & 0xf0) == 0xf0 || dev->lastcmd != cmd || dev->nostat) { + dev->lastcmd = cmd; + spin_unlock_irqrestore(&dev->lock, flags); + xbuf[0] = cmd; + if (status_event[type].decode) + status_event[type].decode(ev, xbuf + 1); + qlen = status_event[type].qlen + 1; + } else { + spin_unlock_irqrestore(&dev->lock, flags); + if (status_event[type].decode) + status_event[type].decode(ev, xbuf + 0); + qlen = status_event[type].qlen; + } + if (count < qlen) + return -ENOMEM; + memcpy(buf, xbuf, qlen); + return qlen; + } +} +EXPORT_SYMBOL(snd_midi_event_decode); + + +/* decode note event */ +static void note_decode(struct snd_seq_event *ev, unsigned char *buf) +{ + buf[0] = ev->data.note.note & 0x7f; + buf[1] = ev->data.note.velocity & 0x7f; +} + +/* decode one parameter controls */ +static void one_param_decode(struct snd_seq_event *ev, unsigned char *buf) +{ + buf[0] = ev->data.control.value & 0x7f; +} + +/* decode pitch wheel change */ +static void pitchbend_decode(struct snd_seq_event *ev, unsigned char *buf) +{ + int value = ev->data.control.value + 8192; + buf[0] = value & 0x7f; + buf[1] = (value >> 7) & 0x7f; +} + +/* decode midi control change */ +static void two_param_decode(struct snd_seq_event *ev, unsigned char *buf) +{ + buf[0] = ev->data.control.param & 0x7f; + buf[1] = ev->data.control.value & 0x7f; +} + +/* decode song position */ +static void songpos_decode(struct snd_seq_event *ev, unsigned char *buf) +{ + buf[0] = ev->data.control.value & 0x7f; + buf[1] = (ev->data.control.value >> 7) & 0x7f; +} + +/* decode 14bit control */ +static int extra_decode_ctrl14(struct snd_midi_event *dev, unsigned char *buf, + int count, struct snd_seq_event *ev) +{ + unsigned char cmd; + int idx = 0; + + cmd = MIDI_CMD_CONTROL|(ev->data.control.channel & 0x0f); + if (ev->data.control.param < 0x20) { + if (count < 4) + return -ENOMEM; + if (dev->nostat && count < 6) + return -ENOMEM; + if (cmd != dev->lastcmd || dev->nostat) { + if (count < 5) + return -ENOMEM; + buf[idx++] = dev->lastcmd = cmd; + } + buf[idx++] = ev->data.control.param; + buf[idx++] = (ev->data.control.value >> 7) & 0x7f; + if (dev->nostat) + buf[idx++] = cmd; + buf[idx++] = ev->data.control.param + 0x20; + buf[idx++] = ev->data.control.value & 0x7f; + } else { + if (count < 2) + return -ENOMEM; + if (cmd != dev->lastcmd || dev->nostat) { + if (count < 3) + return -ENOMEM; + buf[idx++] = dev->lastcmd = cmd; + } + buf[idx++] = ev->data.control.param & 0x7f; + buf[idx++] = ev->data.control.value & 0x7f; + } + return idx; +} + +/* decode reg/nonreg param */ +static int extra_decode_xrpn(struct snd_midi_event *dev, unsigned char *buf, + int count, struct snd_seq_event *ev) +{ + unsigned char cmd; + const char *cbytes; + static const char cbytes_nrpn[4] = { MIDI_CTL_NONREG_PARM_NUM_MSB, + MIDI_CTL_NONREG_PARM_NUM_LSB, + MIDI_CTL_MSB_DATA_ENTRY, + MIDI_CTL_LSB_DATA_ENTRY }; + static const char cbytes_rpn[4] = { MIDI_CTL_REGIST_PARM_NUM_MSB, + MIDI_CTL_REGIST_PARM_NUM_LSB, + MIDI_CTL_MSB_DATA_ENTRY, + MIDI_CTL_LSB_DATA_ENTRY }; + unsigned char bytes[4]; + int idx = 0, i; + + if (count < 8) + return -ENOMEM; + if (dev->nostat && count < 12) + return -ENOMEM; + cmd = MIDI_CMD_CONTROL|(ev->data.control.channel & 0x0f); + bytes[0] = (ev->data.control.param & 0x3f80) >> 7; + bytes[1] = ev->data.control.param & 0x007f; + bytes[2] = (ev->data.control.value & 0x3f80) >> 7; + bytes[3] = ev->data.control.value & 0x007f; + if (cmd != dev->lastcmd && !dev->nostat) { + if (count < 9) + return -ENOMEM; + buf[idx++] = dev->lastcmd = cmd; + } + cbytes = ev->type == SNDRV_SEQ_EVENT_NONREGPARAM ? cbytes_nrpn : cbytes_rpn; + for (i = 0; i < 4; i++) { + if (dev->nostat) + buf[idx++] = dev->lastcmd = cmd; + buf[idx++] = cbytes[i]; + buf[idx++] = bytes[i]; + } + return idx; +} -- cgit v1.2.3