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split alsa from mididrv
svn-id: r5890
This commit is contained in:
Oliver Kiehl
parent
0ac3214fd5
commit
a112545d7e
246
backends/midi/alsa.cpp
Normal file
246
backends/midi/alsa.cpp
Normal file
@ -0,0 +1,246 @@
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/* ScummVM - Scumm Interpreter
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* Copyright (C) 2001 Ludvig Strigeus
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* Copyright (C) 2001/2002 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*/
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#if defined(UNIX) && defined(USE_ALSA)
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#include "sound/mpu401.h"
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#include "stdafx.h"
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#include "common/engine.h" // for warning/error/debug
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#include <alsa/asoundlib.h>
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/*
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* ALSA sequencer driver
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* Mostly cut'n'pasted from Virtual Tiny Keyboard (vkeybd) by Takashi Iwai
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* (you really rox, you know?)
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*/
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#if SND_LIB_MINOR >= 6
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#define snd_seq_flush_output(x) snd_seq_drain_output(x)
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#define snd_seq_set_client_group(x,name) /*nop */
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#define my_snd_seq_open(seqp) snd_seq_open(seqp, "hw", SND_SEQ_OPEN_OUTPUT, 0)
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#else
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/* SND_SEQ_OPEN_OUT causes oops on early version of ALSA */
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#define my_snd_seq_open(seqp) snd_seq_open(seqp, SND_SEQ_OPEN)
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#endif
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/*
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* parse address string
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*/
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#define ADDR_DELIM ".:"
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class MidiDriver_ALSA:public MidiDriver_MPU401 {
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public:
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MidiDriver_ALSA();
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int open(int mode);
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void close();
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void send(uint32 b);
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void pause(bool p);
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void set_stream_callback(void *param, StreamCallback *sc);
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// void setPitchBendRange (byte channel, uint range);
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private:
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void send_event(int do_flush);
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snd_seq_event_t ev;
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StreamCallback *_stream_proc;
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void *_stream_param;
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int _mode;
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snd_seq_t *seq_handle;
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int seq_client, seq_port;
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int my_client, my_port;
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static int parse_addr(char *arg, int *client, int *port);
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};
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MidiDriver_ALSA::MidiDriver_ALSA():_mode(0), seq_handle(0), seq_client(0), seq_port(0), my_client(0),
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my_port(0)
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{
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}
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int MidiDriver_ALSA::parse_addr(char *arg, int *client, int *port)
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{
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char *p;
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if (isdigit(*arg)) {
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if ((p = strpbrk(arg, ADDR_DELIM)) == NULL)
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return -1;
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*client = atoi(arg);
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*port = atoi(p + 1);
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} else {
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if (*arg == 's' || *arg == 'S') {
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*client = SND_SEQ_ADDRESS_SUBSCRIBERS;
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*port = 0;
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} else
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return -1;
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}
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return 0;
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}
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void MidiDriver_ALSA::send_event(int do_flush)
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{
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snd_seq_ev_set_direct(&ev);
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snd_seq_ev_set_source(&ev, my_port);
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snd_seq_ev_set_dest(&ev, seq_client, seq_port);
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snd_seq_event_output(seq_handle, &ev);
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if (do_flush)
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snd_seq_flush_output(seq_handle);
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}
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int MidiDriver_ALSA::open(int mode)
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{
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char *var;
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unsigned int caps;
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if (_mode != 0)
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return MERR_ALREADY_OPEN;
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if (mode != MO_SIMPLE)
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return MERR_STREAMING_NOT_AVAILABLE;
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_mode = mode;
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if (!(var = getenv("SCUMMVM_PORT"))) {
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// default alsa port if none specified
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if (parse_addr("65:0", &seq_client, &seq_port) < 0) {
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error("Invalid port %s", var);
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return -1;
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}
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}
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else {
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if (parse_addr(var, &seq_client, &seq_port) < 0) {
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error("Invalid port %s", var);
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return -1;
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}
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}
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if (my_snd_seq_open(&seq_handle)) {
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error("Can't open sequencer");
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return -1;
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}
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my_client = snd_seq_client_id(seq_handle);
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snd_seq_set_client_name(seq_handle, "SCUMMVM");
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snd_seq_set_client_group(seq_handle, "input");
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caps = SND_SEQ_PORT_CAP_READ;
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if (seq_client == SND_SEQ_ADDRESS_SUBSCRIBERS)
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caps = ~SND_SEQ_PORT_CAP_SUBS_READ;
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my_port =
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snd_seq_create_simple_port(seq_handle, "SCUMMVM", caps,
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SND_SEQ_PORT_TYPE_MIDI_GENERIC | SND_SEQ_PORT_TYPE_APPLICATION);
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if (my_port < 0) {
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snd_seq_close(seq_handle);
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error("Can't create port");
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return -1;
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}
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if (seq_client != SND_SEQ_ADDRESS_SUBSCRIBERS) {
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/* subscribe to MIDI port */
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if (snd_seq_connect_to(seq_handle, my_port, seq_client, seq_port) < 0) {
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snd_seq_close(seq_handle);
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error("Can't subscribe to MIDI port (%d:%d)", seq_client, seq_port);
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return -1;
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}
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}
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printf("ALSA client initialised [%d:%d]\n", my_client, my_port);
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return 0;
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}
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void MidiDriver_ALSA::close()
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{
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_mode = 0;
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if (seq_handle)
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snd_seq_close(seq_handle);
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}
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void MidiDriver_ALSA::send(uint32 b)
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{
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unsigned int midiCmd[4];
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ev.type = SND_SEQ_EVENT_OSS;
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midiCmd[3] = (b & 0xFF000000) >> 24;
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midiCmd[2] = (b & 0x00FF0000) >> 16;
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midiCmd[1] = (b & 0x0000FF00) >> 8;
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midiCmd[0] = (b & 0x000000FF);
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ev.data.raw32.d[0] = midiCmd[0];
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ev.data.raw32.d[1] = midiCmd[1];
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ev.data.raw32.d[2] = midiCmd[2];
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unsigned char chanID = midiCmd[0] & 0x0F;
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switch (midiCmd[0] & 0xF0) {
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case 0x80:
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snd_seq_ev_set_noteoff(&ev, chanID, midiCmd[1], midiCmd[2]);
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send_event(1);
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break;
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case 0x90:
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snd_seq_ev_set_noteon(&ev, chanID, midiCmd[1], midiCmd[2]);
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send_event(1);
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break;
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case 0xB0:
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/* is it this simple ? Wow... */
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snd_seq_ev_set_controller(&ev, chanID, midiCmd[1], midiCmd[2]);
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send_event(1);
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break;
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case 0xC0:
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snd_seq_ev_set_pgmchange(&ev, chanID, midiCmd[1]);
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send_event(0);
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break;
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case 0xE0:{
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// long theBend = ((((long)midiCmd[1] + (long)(midiCmd[2] << 7))) - 0x2000) / 4;
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// snd_seq_ev_set_pitchbend(&ev, chanID, theBend);
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long theBend = ((long)midiCmd[1] + (long)(midiCmd[2] << 7)) - 0x2000;
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snd_seq_ev_set_pitchbend(&ev, chanID, theBend);
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send_event(1);
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}
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break;
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default:
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error("Unknown Command: %08x\n", (int)b);
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/* I don't know if this works but, well... */
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send_event(1);
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break;
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}
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}
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void MidiDriver_ALSA::pause(bool p)
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{
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if (_mode == MO_STREAMING) {
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/* Err... and what? */
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}
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}
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void MidiDriver_ALSA::set_stream_callback(void *param, StreamCallback *sc)
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{
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_stream_param = param;
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_stream_proc = sc;
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}
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MidiDriver *MidiDriver_ALSA_create()
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{
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return new MidiDriver_ALSA();
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}
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#endif
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@ -7,7 +7,8 @@ MODULE_OBJS = \
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backends/midi/adlib.o \
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backends/midi/coreaudio.o \
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backends/midi/null.o \
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backends/midi/quicktime.o
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backends/midi/quicktime.o \
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backends/midi/alsa.o
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# Include common rules
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include common.rules
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@ -655,225 +655,3 @@ MidiDriver *MidiDriver_SEQ_create()
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#endif
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#if defined(UNIX) && defined(USE_ALSA)
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#include <alsa/asoundlib.h>
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/*
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* ALSA sequencer driver
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* Mostly cut'n'pasted from Virtual Tiny Keyboard (vkeybd) by Takashi Iwai
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* (you really rox, you know?)
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*/
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#if SND_LIB_MINOR >= 6
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#define snd_seq_flush_output(x) snd_seq_drain_output(x)
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#define snd_seq_set_client_group(x,name) /*nop */
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#define my_snd_seq_open(seqp) snd_seq_open(seqp, "hw", SND_SEQ_OPEN_OUTPUT, 0)
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#else
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/* SND_SEQ_OPEN_OUT causes oops on early version of ALSA */
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#define my_snd_seq_open(seqp) snd_seq_open(seqp, SND_SEQ_OPEN)
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#endif
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/*
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* parse address string
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*/
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#define ADDR_DELIM ".:"
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class MidiDriver_ALSA:public MidiDriver_MPU401 {
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public:
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MidiDriver_ALSA();
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int open(int mode);
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void close();
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void send(uint32 b);
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void pause(bool p);
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void set_stream_callback(void *param, StreamCallback *sc);
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// void setPitchBendRange (byte channel, uint range);
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private:
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void send_event(int do_flush);
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snd_seq_event_t ev;
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StreamCallback *_stream_proc;
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void *_stream_param;
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int _mode;
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snd_seq_t *seq_handle;
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int seq_client, seq_port;
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int my_client, my_port;
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static int parse_addr(char *arg, int *client, int *port);
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};
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MidiDriver_ALSA::MidiDriver_ALSA():_mode(0), seq_handle(0), seq_client(0), seq_port(0), my_client(0),
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my_port(0)
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{
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}
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int MidiDriver_ALSA::parse_addr(char *arg, int *client, int *port)
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{
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char *p;
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if (isdigit(*arg)) {
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if ((p = strpbrk(arg, ADDR_DELIM)) == NULL)
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return -1;
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*client = atoi(arg);
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*port = atoi(p + 1);
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} else {
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if (*arg == 's' || *arg == 'S') {
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*client = SND_SEQ_ADDRESS_SUBSCRIBERS;
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*port = 0;
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} else
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return -1;
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}
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return 0;
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}
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void MidiDriver_ALSA::send_event(int do_flush)
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{
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snd_seq_ev_set_direct(&ev);
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snd_seq_ev_set_source(&ev, my_port);
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snd_seq_ev_set_dest(&ev, seq_client, seq_port);
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snd_seq_event_output(seq_handle, &ev);
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if (do_flush)
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snd_seq_flush_output(seq_handle);
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}
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int MidiDriver_ALSA::open(int mode)
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{
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char *var;
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unsigned int caps;
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if (_mode != 0)
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return MERR_ALREADY_OPEN;
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if (mode != MO_SIMPLE)
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return MERR_STREAMING_NOT_AVAILABLE;
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_mode = mode;
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if (!(var = getenv("SCUMMVM_PORT"))) {
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// default alsa port if none specified
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if (parse_addr("65:0", &seq_client, &seq_port) < 0) {
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error("Invalid port %s", var);
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return -1;
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}
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}
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else {
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if (parse_addr(var, &seq_client, &seq_port) < 0) {
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error("Invalid port %s", var);
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return -1;
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}
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}
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if (my_snd_seq_open(&seq_handle)) {
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error("Can't open sequencer");
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return -1;
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}
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my_client = snd_seq_client_id(seq_handle);
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snd_seq_set_client_name(seq_handle, "SCUMMVM");
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snd_seq_set_client_group(seq_handle, "input");
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caps = SND_SEQ_PORT_CAP_READ;
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if (seq_client == SND_SEQ_ADDRESS_SUBSCRIBERS)
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caps = ~SND_SEQ_PORT_CAP_SUBS_READ;
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my_port =
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snd_seq_create_simple_port(seq_handle, "SCUMMVM", caps,
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SND_SEQ_PORT_TYPE_MIDI_GENERIC | SND_SEQ_PORT_TYPE_APPLICATION);
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if (my_port < 0) {
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snd_seq_close(seq_handle);
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error("Can't create port");
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return -1;
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}
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if (seq_client != SND_SEQ_ADDRESS_SUBSCRIBERS) {
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/* subscribe to MIDI port */
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if (snd_seq_connect_to(seq_handle, my_port, seq_client, seq_port) < 0) {
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snd_seq_close(seq_handle);
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error("Can't subscribe to MIDI port (%d:%d)", seq_client, seq_port);
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return -1;
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}
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}
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printf("ALSA client initialised [%d:%d]\n", my_client, my_port);
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return 0;
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}
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void MidiDriver_ALSA::close()
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{
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_mode = 0;
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if (seq_handle)
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snd_seq_close(seq_handle);
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}
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void MidiDriver_ALSA::send(uint32 b)
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{
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unsigned int midiCmd[4];
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ev.type = SND_SEQ_EVENT_OSS;
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midiCmd[3] = (b & 0xFF000000) >> 24;
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midiCmd[2] = (b & 0x00FF0000) >> 16;
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midiCmd[1] = (b & 0x0000FF00) >> 8;
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midiCmd[0] = (b & 0x000000FF);
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ev.data.raw32.d[0] = midiCmd[0];
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ev.data.raw32.d[1] = midiCmd[1];
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ev.data.raw32.d[2] = midiCmd[2];
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unsigned char chanID = midiCmd[0] & 0x0F;
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switch (midiCmd[0] & 0xF0) {
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case 0x80:
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snd_seq_ev_set_noteoff(&ev, chanID, midiCmd[1], midiCmd[2]);
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send_event(1);
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break;
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case 0x90:
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snd_seq_ev_set_noteon(&ev, chanID, midiCmd[1], midiCmd[2]);
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send_event(1);
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break;
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case 0xB0:
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/* is it this simple ? Wow... */
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snd_seq_ev_set_controller(&ev, chanID, midiCmd[1], midiCmd[2]);
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send_event(1);
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break;
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case 0xC0:
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snd_seq_ev_set_pgmchange(&ev, chanID, midiCmd[1]);
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send_event(0);
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break;
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case 0xE0:{
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// long theBend = ((((long)midiCmd[1] + (long)(midiCmd[2] << 7))) - 0x2000) / 4;
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// snd_seq_ev_set_pitchbend(&ev, chanID, theBend);
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long theBend = ((long)midiCmd[1] + (long)(midiCmd[2] << 7)) - 0x2000;
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snd_seq_ev_set_pitchbend(&ev, chanID, theBend);
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send_event(1);
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}
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break;
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default:
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error("Unknown Command: %08x\n", (int)b);
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/* I don't know if this works but, well... */
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send_event(1);
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break;
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}
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}
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void MidiDriver_ALSA::pause(bool p)
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{
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if (_mode == MO_STREAMING) {
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/* Err... and what? */
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}
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}
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|
||||
void MidiDriver_ALSA::set_stream_callback(void *param, StreamCallback *sc)
|
||||
{
|
||||
_stream_param = param;
|
||||
_stream_proc = sc;
|
||||
}
|
||||
|
||||
MidiDriver *MidiDriver_ALSA_create()
|
||||
{
|
||||
return new MidiDriver_ALSA();
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user