Mercurial > hg > svcore
view plugin/api/dssi_alsa_compat.c @ 1608:0e0947896fd3
Fix compiler warnings
author | Chris Cannam |
---|---|
date | Wed, 27 Feb 2019 12:31:12 +0000 |
parents | d7f3dfe6f9a4 |
children |
line wrap: on
line source
/* DSSI ALSA compatibility library * * This library provides for non-ALSA systems the ALSA snd_seq_event_t handling * necessary to compile and run DSSI. It was extracted from alsa-lib 1.0.8. * * See ./alsa/README for more information. */ #include <stdlib.h> #include <errno.h> #include "alsa/asoundef.h" #include "alsa/sound/asequencer.h" #include "alsa/seq.h" #include "alsa/seq_event.h" #include "alsa/seq_midi_event.h" /** * \file seq/seq_event.c * \brief Sequencer Event Types * \author Takashi Iwai <tiwai@suse.de> * \date 2001 */ #define FIXED_EV(x) (_SND_SEQ_TYPE(SND_SEQ_EVFLG_FIXED) | _SND_SEQ_TYPE(x)) /** Event types conversion array */ /* const unsigned int snd_seq_event_types[256] = { [SND_SEQ_EVENT_SYSTEM ... SND_SEQ_EVENT_RESULT] = FIXED_EV(SND_SEQ_EVFLG_RESULT), [SND_SEQ_EVENT_NOTE] = FIXED_EV(SND_SEQ_EVFLG_NOTE) | _SND_SEQ_TYPE_OPT(SND_SEQ_EVFLG_NOTE_TWOARG), [SND_SEQ_EVENT_NOTEON ... SND_SEQ_EVENT_KEYPRESS] = FIXED_EV(SND_SEQ_EVFLG_NOTE), [SND_SEQ_EVENT_CONTROLLER ... SND_SEQ_EVENT_REGPARAM] = FIXED_EV(SND_SEQ_EVFLG_CONTROL), [SND_SEQ_EVENT_START ... SND_SEQ_EVENT_STOP] = FIXED_EV(SND_SEQ_EVFLG_QUEUE), [SND_SEQ_EVENT_SETPOS_TICK] = FIXED_EV(SND_SEQ_EVFLG_QUEUE) | _SND_SEQ_TYPE_OPT(SND_SEQ_EVFLG_QUEUE_TICK), [SND_SEQ_EVENT_SETPOS_TIME] = FIXED_EV(SND_SEQ_EVFLG_QUEUE) | _SND_SEQ_TYPE_OPT(SND_SEQ_EVFLG_QUEUE_TIME), [SND_SEQ_EVENT_TEMPO ... SND_SEQ_EVENT_SYNC_POS] = FIXED_EV(SND_SEQ_EVFLG_QUEUE) | _SND_SEQ_TYPE_OPT(SND_SEQ_EVFLG_QUEUE_VALUE), [SND_SEQ_EVENT_TUNE_REQUEST ... SND_SEQ_EVENT_SENSING] = FIXED_EV(SND_SEQ_EVFLG_NONE), [SND_SEQ_EVENT_ECHO ... SND_SEQ_EVENT_OSS] = FIXED_EV(SND_SEQ_EVFLG_RAW) | FIXED_EV(SND_SEQ_EVFLG_SYSTEM), [SND_SEQ_EVENT_CLIENT_START ... SND_SEQ_EVENT_PORT_CHANGE] = FIXED_EV(SND_SEQ_EVFLG_MESSAGE), [SND_SEQ_EVENT_PORT_SUBSCRIBED ... SND_SEQ_EVENT_PORT_UNSUBSCRIBED] = FIXED_EV(SND_SEQ_EVFLG_CONNECTION), [SND_SEQ_EVENT_SAMPLE ... SND_SEQ_EVENT_SAMPLE_PRIVATE1] = FIXED_EV(SND_SEQ_EVFLG_SAMPLE), [SND_SEQ_EVENT_USR0 ... SND_SEQ_EVENT_USR9] = FIXED_EV(SND_SEQ_EVFLG_RAW) | FIXED_EV(SND_SEQ_EVFLG_USERS), [SND_SEQ_EVENT_INSTR_BEGIN ... SND_SEQ_EVENT_INSTR_CHANGE] = _SND_SEQ_TYPE(SND_SEQ_EVFLG_INSTR) | _SND_SEQ_TYPE(SND_SEQ_EVFLG_VARUSR), [SND_SEQ_EVENT_SYSEX ... SND_SEQ_EVENT_BOUNCE] = _SND_SEQ_TYPE(SND_SEQ_EVFLG_VARIABLE), [SND_SEQ_EVENT_USR_VAR0 ... SND_SEQ_EVENT_USR_VAR4] = _SND_SEQ_TYPE(SND_SEQ_EVFLG_VARIABLE) | _SND_SEQ_TYPE(SND_SEQ_EVFLG_USERS), [SND_SEQ_EVENT_NONE] = FIXED_EV(SND_SEQ_EVFLG_NONE), }; */ /** * \file seq/seq_midi_event.c * \brief MIDI byte <-> sequencer event coder * \author Takashi Iwai <tiwai@suse.de> * \author Jaroslav Kysela <perex@suse.cz> * \date 2000-2001 */ /* * MIDI byte <-> sequencer event coder * * Copyright (C) 1998,99,2000 Takashi Iwai <tiwai@suse.de>, * Jaroslav Kysela <perex@suse.cz> * * * This library is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation; either version 2.1 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* midi status */ struct snd_midi_event { size_t qlen; /* queue length */ size_t read; /* chars read */ int type; /* current event type */ unsigned char lastcmd; unsigned char nostat; size_t bufsize; unsigned char *buf; /* input buffer */ }; /* queue type */ /* from 0 to 7 are normal commands (note off, on, etc.) */ #define ST_NOTEOFF 0 #define ST_NOTEON 1 #define ST_SPECIAL 8 #define ST_SYSEX ST_SPECIAL /* from 8 to 15 are events for 0xf0-0xf7 */ /* status event types */ typedef void (*event_encode_t)(snd_midi_event_t *dev, snd_seq_event_t *ev); typedef void (*event_decode_t)(const snd_seq_event_t *ev, unsigned char *buf); /* * prototypes */ static void note_event(snd_midi_event_t *dev, snd_seq_event_t *ev); static void one_param_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev); static void pitchbend_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev); static void two_param_ctrl_event(snd_midi_event_t *dev, snd_seq_event_t *ev); static void one_param_event(snd_midi_event_t *dev, snd_seq_event_t *ev); static void songpos_event(snd_midi_event_t *dev, snd_seq_event_t *ev); static void note_decode(const snd_seq_event_t *ev, unsigned char *buf); static void one_param_decode(const snd_seq_event_t *ev, unsigned char *buf); static void pitchbend_decode(const snd_seq_event_t *ev, unsigned char *buf); static void two_param_decode(const snd_seq_event_t *ev, unsigned char *buf); static void songpos_decode(const snd_seq_event_t *ev, unsigned char *buf); /* * event list */ static struct status_event_list_t { int event; int qlen; event_encode_t encode; event_decode_t decode; } status_event[] = { /* 0x80 - 0xf0 */ {SND_SEQ_EVENT_NOTEOFF, 2, note_event, note_decode}, {SND_SEQ_EVENT_NOTEON, 2, note_event, note_decode}, {SND_SEQ_EVENT_KEYPRESS, 2, note_event, note_decode}, {SND_SEQ_EVENT_CONTROLLER, 2, two_param_ctrl_event, two_param_decode}, {SND_SEQ_EVENT_PGMCHANGE, 1, one_param_ctrl_event, one_param_decode}, {SND_SEQ_EVENT_CHANPRESS, 1, one_param_ctrl_event, one_param_decode}, {SND_SEQ_EVENT_PITCHBEND, 2, pitchbend_ctrl_event, pitchbend_decode}, {SND_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf0 */ /* 0xf0 - 0xff */ {SND_SEQ_EVENT_SYSEX, 1, NULL, NULL}, /* sysex: 0xf0 */ {SND_SEQ_EVENT_QFRAME, 1, one_param_event, one_param_decode}, /* 0xf1 */ {SND_SEQ_EVENT_SONGPOS, 2, songpos_event, songpos_decode}, /* 0xf2 */ {SND_SEQ_EVENT_SONGSEL, 1, one_param_event, one_param_decode}, /* 0xf3 */ {SND_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf4 */ {SND_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf5 */ {SND_SEQ_EVENT_TUNE_REQUEST, 0, NULL, NULL}, /* 0xf6 */ {SND_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf7 */ {SND_SEQ_EVENT_CLOCK, 0, NULL, NULL}, /* 0xf8 */ {SND_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xf9 */ {SND_SEQ_EVENT_START, 0, NULL, NULL}, /* 0xfa */ {SND_SEQ_EVENT_CONTINUE, 0, NULL, NULL}, /* 0xfb */ {SND_SEQ_EVENT_STOP, 0, NULL, NULL}, /* 0xfc */ {SND_SEQ_EVENT_NONE, 0, NULL, NULL}, /* 0xfd */ {SND_SEQ_EVENT_SENSING, 0, NULL, NULL}, /* 0xfe */ {SND_SEQ_EVENT_RESET, 0, NULL, NULL}, /* 0xff */ }; #ifdef UNNEEDED_BY_DSSI static int extra_decode_ctrl14(snd_midi_event_t *dev, unsigned char *buf, int len, const snd_seq_event_t *ev); static int extra_decode_xrpn(snd_midi_event_t *dev, unsigned char *buf, int count, const snd_seq_event_t *ev); static struct extra_event_list_t { int event; int (*decode)(snd_midi_event_t *dev, unsigned char *buf, int len, const snd_seq_event_t *ev); } extra_event[] = { {SND_SEQ_EVENT_CONTROL14, extra_decode_ctrl14}, {SND_SEQ_EVENT_NONREGPARAM, extra_decode_xrpn}, {SND_SEQ_EVENT_REGPARAM, extra_decode_xrpn}, }; #define numberof(ary) (sizeof(ary)/sizeof(ary[0])) #endif /* UNNEEDED_BY_DSSI */ /** * \brief Initialize MIDI event parser * \param bufsize buffer size for MIDI message * \param rdev allocated MIDI event parser * \return 0 on success otherwise a negative error code * * Allocates and initializes MIDI event parser. */ int snd_midi_event_new(size_t bufsize, snd_midi_event_t **rdev) { snd_midi_event_t *dev; *rdev = NULL; dev = (snd_midi_event_t *)calloc(1, sizeof(snd_midi_event_t)); if (dev == NULL) return -ENOMEM; if (bufsize > 0) { dev->buf = malloc(bufsize); if (dev->buf == NULL) { free(dev); return -ENOMEM; } } dev->bufsize = bufsize; dev->lastcmd = 0xff; *rdev = dev; return 0; } /** * \brief Free MIDI event parser * \param rdev MIDI event parser * \return 0 on success otherwise a negative error code * * Frees MIDI event parser. */ void snd_midi_event_free(snd_midi_event_t *dev) { if (dev != NULL) { if (dev->buf) free(dev->buf); free(dev); } } #ifdef UNNEEDED_BY_DSSI /** * \brief Enable/disable MIDI command merging * \param dev MIDI event parser * \param on 0 - enable MIDI command merging, 1 - always pass the command * * Enable/disable MIDI command merging */ void snd_midi_event_no_status(snd_midi_event_t *dev, int on) { dev->nostat = on ? 1 : 0; } #endif /* UNNEEDED_BY_DSSI */ /* * initialize record */ inline static void reset_encode(snd_midi_event_t *dev) { dev->read = 0; dev->qlen = 0; dev->type = 0; } /** * \brief Reset MIDI encode parser * \param dev MIDI event parser * \return 0 on success otherwise a negative error code * * Resets MIDI encode parser */ void snd_midi_event_reset_encode(snd_midi_event_t *dev) { reset_encode(dev); } #ifdef UNNEEDED_BY_DSSI /** * \brief Reset MIDI decode parser * \param dev MIDI event parser * \return 0 on success otherwise a negative error code * * Resets MIDI decode parser */ void snd_midi_event_reset_decode(snd_midi_event_t *dev) { dev->lastcmd = 0xff; } /** * \brief Initializes MIDI parsers * \param dev MIDI event parser * \return 0 on success otherwise a negative error code * * Initializes MIDI parsers (both encode and decode) */ void snd_midi_event_init(snd_midi_event_t *dev) { snd_midi_event_reset_encode(dev); snd_midi_event_reset_decode(dev); } /** * \brief Resize MIDI message (event) buffer * \param dev MIDI event parser * \param bufsize new requested buffer size * \return 0 on success otherwise a negative error code * * Resizes MIDI message (event) buffer. */ int snd_midi_event_resize_buffer(snd_midi_event_t *dev, size_t bufsize) { unsigned char *new_buf, *old_buf; if (bufsize == dev->bufsize) return 0; new_buf = malloc(bufsize); if (new_buf == NULL) return -ENOMEM; old_buf = dev->buf; dev->buf = new_buf; dev->bufsize = bufsize; reset_encode(dev); if (old_buf) free(old_buf); return 0; } #endif /* UNNEEDED_BY_DSSI */ /** * \brief Read bytes and encode to sequencer event if finished * \param dev MIDI event parser * \param buf MIDI byte stream * \param count count of bytes of MIDI byte stream to encode * \param ev Result - sequencer event * \return count of encoded bytes otherwise a negative error code * * Read bytes and encode to sequencer event if finished. * If complete sequencer event is available, ev->type is not * equal to #SND_SEQ_EVENT_NONE. */ long snd_midi_event_encode(snd_midi_event_t *dev, const unsigned char *buf, long count, snd_seq_event_t *ev) { long result = 0; int rc; ev->type = SND_SEQ_EVENT_NONE; while (count-- > 0) { rc = snd_midi_event_encode_byte(dev, *buf++, ev); result++; if (rc < 0) return rc; else if (rc > 0) return result; } return result; } /** * \brief Read one byte and encode to sequencer event if finished * \param dev MIDI event parser * \param c a byte of MIDI stream * \param ev Result - sequencer event * \return 1 - sequencer event is completed, 0 - next byte is required for completion, otherwise a negative error code * * Read byte and encode to sequencer event if finished. */ int snd_midi_event_encode_byte(snd_midi_event_t *dev, int c, snd_seq_event_t *ev) { int rc = 0; c &= 0xff; 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 1; } if (dev->qlen > 0) { /* rest of command */ dev->buf[dev->read++] = c; if (dev->type != ST_SYSEX) dev->qlen--; } else { /* new command */ dev->read = 1; if (c & 0x80) { dev->buf[0] = c; if ((c & 0xf0) == 0xf0) /* special events */ dev->type = (c & 0x0f) + ST_SPECIAL; else dev->type = (c >> 4) & 0x07; dev->qlen = status_event[dev->type].qlen; } else { /* process this byte as argument */ dev->buf[dev->read++] = c; dev->qlen = status_event[dev->type].qlen - 1; } } 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); rc = 1; } 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 = 1; } } return rc; } /* encode note event */ static void note_event(snd_midi_event_t *dev, snd_seq_event_t *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(snd_midi_event_t *dev, snd_seq_event_t *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(snd_midi_event_t *dev, snd_seq_event_t *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(snd_midi_event_t *dev, snd_seq_event_t *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(snd_midi_event_t *dev, snd_seq_event_t *ev) { ev->data.control.value = dev->buf[1]; } /* encode song position */ static void songpos_event(snd_midi_event_t *dev, snd_seq_event_t *ev) { ev->data.control.value = (int)dev->buf[2] * 128 + (int)dev->buf[1]; } #ifdef UNNEEDED_BY_DSSI /** * \brief Decode sequencer event to MIDI byte stream * \param dev MIDI event parser * \param buf Result - MIDI byte stream * \param count Available bytes in MIDI byte stream * \param ev Event to decode * \return count of decoded bytes otherwise a negative error code * * Decode sequencer event to MIDI byte stream. */ long snd_midi_event_decode(snd_midi_event_t *dev, unsigned char *buf, long count, const snd_seq_event_t *ev) { int cmd; long qlen; unsigned int type; if (ev->type == SNDRV_SEQ_EVENT_NONE) return -ENOENT; for (type = 0; type < numberof(status_event); type++) { if (ev->type == status_event[type].event) goto __found; } for (type = 0; type < numberof(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) { qlen = ev->data.ext.len; if (count < qlen) return -ENOMEM; switch (ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) { case SNDRV_SEQ_EVENT_LENGTH_FIXED: return -EINVAL; /* invalid event */ } memcpy(buf, ev->data.ext.ptr, qlen); return qlen; } else { unsigned char xbuf[4]; if ((cmd & 0xf0) == 0xf0 || dev->lastcmd != cmd || dev->nostat) { dev->lastcmd = cmd; xbuf[0] = cmd; if (status_event[type].decode) status_event[type].decode(ev, xbuf + 1); qlen = status_event[type].qlen + 1; } else { 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; } } #endif /* UNNEEDED_BY_DSSI */ /* decode note event */ static void note_decode(const snd_seq_event_t *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(const snd_seq_event_t *ev, unsigned char *buf) { buf[0] = ev->data.control.value & 0x7f; } /* decode pitch wheel change */ static void pitchbend_decode(const snd_seq_event_t *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(const snd_seq_event_t *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(const snd_seq_event_t *ev, unsigned char *buf) { buf[0] = ev->data.control.value & 0x7f; buf[1] = (ev->data.control.value >> 7) & 0x7f; } #ifdef UNNEEDED_BY_DSSI /* decode 14bit control */ static int extra_decode_ctrl14(snd_midi_event_t *dev, unsigned char *buf, int count, const snd_seq_event_t *ev) { unsigned char cmd; int idx = 0; cmd = MIDI_CMD_CONTROL|(ev->data.control.channel & 0x0f); if (ev->data.control.param < 32) { 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 + 32; 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(snd_midi_event_t *dev, unsigned char *buf, int count, const snd_seq_event_t *ev) { unsigned char cmd; char *cbytes; static 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 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 & 0x007f; bytes[1] = (ev->data.control.param & 0x3f80) >> 7; bytes[2] = ev->data.control.value & 0x007f; bytes[3] = (ev->data.control.value & 0x3f80) >> 7; if (cmd != dev->lastcmd && !dev->nostat) { if (count < 9) return -ENOMEM; buf[idx++] = dev->lastcmd = cmd; } cbytes = ev->type == SND_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; } #endif /* UNNEEDED_BY_DSSI */