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diff --git a/kscd/cddaslave.c b/kscd/cddaslave.c
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+/*
+ * @(#)cddaslave.c 1.11 13 Sep 1995
+ *
+ * Digital audio manipulator for WorkMan.
+ *
+ * The CDDA architecture looks like this:
+ *
+ * WorkMan (or another UI!)
+ * ^^^
+ * ||| (separate processes connected by pipe)
+ * vvv
+ * +------------- cddaslave -------------+
+ * | | |
+ * command module CDDA reader audio output
+ * (portable) (per platform) (per platform)
+ *
+ * This source file has the command module and some of the scaffolding
+ * to hold cddaslave together, plus some non-system-dependent audio
+ * processing code. Look in plat_*_cdda.c for system-specific stuff.
+ */
+
+
+#include "libwm/include/wm_config.h"
+#include "libwm/include/wm_cdda.h"
+
+#ifdef BUILD_CDDA /* { */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/time.h>
+
+#ifndef timerclear
+#define timerclear(tvp) ((tvp)->tv_sec = (tvp)->tv_usec = 0)
+#endif
+
+int playing = 0; /* Should the CD be playing now? */
+
+/*
+ * Loudness setting, plus the floating volume multiplier and decaying-average
+ * volume level.
+ */
+int loudness = 0;
+unsigned int volume = 32768;
+unsigned int level;
+
+/*
+ * Playback speed (0 = slow)
+ */
+int speed = 128;
+
+/*
+ * This is non-null if we're saving audio to a file.
+ */
+FILE *output = NULL;
+
+/*
+ * Audio file header format.
+ */
+typedef unsigned long u_32;
+struct auheader {
+ u_32 magic;
+ u_32 hdr_size;
+ u_32 data_size;
+ u_32 encoding;
+ u_32 sample_rate;
+ u_32 channels;
+};
+
+#ifdef BIG_ENDIAN
+# ifndef htonl
+# define htonl(x) (x)
+# endif
+#else
+extern unsigned long htonl(x);
+#endif
+
+void *malloc();
+long cdda_transform();
+
+/*
+ * Send status information upstream.
+ */
+void
+send_status(struct cdda_block *blk)
+{
+ write(1, blk, sizeof(*blk));
+}
+
+/*
+ * Accept a command from our master.
+ *
+ * The protocol is byte-oriented:
+ * PmsfMSFxyz Play from msf to MSF (MSF can be 0,0,0 to play to end)
+ * xyz is the msf of the start of this chunk, i.e., the
+ * ending boundary for reverse play.
+ * S Stop.
+ * Q Quit.
+ * Vn Set volume level (0-255).
+ * Bn Set balance level (0-255).
+ * EnL Set an equalizer level (n = 0 for bass, 255 for treble)
+ * G Get current status.
+ * sn Set speed multiplier to n.
+ * dn Set direction to forward (n = 0) or reverse.
+ * Fllllx... Start saving to a file (length = l, followed by name)
+ * F0000 Stop saving.
+ * Ln Set loudness level (0-255).
+ */
+void
+command(int cd_fd, struct cdda_block *blk)
+{
+ unsigned char inbuf[10];
+ char *filename;
+ int namelen;
+ struct auheader hdr;
+
+ if (read(0, inbuf, 1) <= 0) /* Parent died. */
+ {
+ wmcdda_close();
+ wmaudio_close();
+ exit(0);
+ }
+
+ switch (inbuf[0]) {
+ case 'P':
+ read(0, inbuf, 9);
+ playing = 1;
+
+ wmaudio_stop();
+
+ wmcdda_setup(inbuf[0] * 60 * 75 + inbuf[1] * 75 + inbuf[2],
+ inbuf[3] * 60 * 75 + inbuf[4] * 75 + inbuf[5],
+ inbuf[6] * 60 * 75 + inbuf[7] * 75 + inbuf[8]);
+
+ wmaudio_ready();
+
+ level = 2500;
+ volume = 1 << 15;
+
+ blk->status = WMCDDA_ACK;
+ send_status(blk);
+ break;
+
+ case 'S':
+ playing = 0;
+ wmaudio_stop();
+ blk->status = WMCDDA_ACK;
+ send_status(blk);
+ blk->status = WMCDDA_STOPPED;
+ send_status(blk);
+ break;
+
+ case 'B':
+ read(0, inbuf, 1);
+ wmaudio_balance(inbuf[0]);
+ blk->status = WMCDDA_ACK;
+ send_status(blk);
+ break;
+
+ case 'V':
+ read(0, inbuf, 1);
+ wmaudio_volume(inbuf[0]);
+ blk->status = WMCDDA_ACK;
+ send_status(blk);
+ break;
+
+ case 'G':
+ blk->status = WMCDDA_ACK;
+ send_status(blk);
+
+ if (playing)
+ blk->status = WMCDDA_PLAYED;
+ else
+ blk->status = WMCDDA_STOPPED;
+ wmaudio_state(blk);
+ send_status(blk);
+ break;
+
+ case 'Q':
+ blk->status = WMCDDA_ACK;
+ send_status(blk);
+ wmcdda_close();
+ wmaudio_close();
+ exit(0);
+
+ case 's':
+ read(0, inbuf, 1);
+ speed = inbuf[0];
+ wmcdda_speed(speed);
+ blk->status = WMCDDA_ACK;
+ send_status(blk);
+ break;
+
+ case 'd':
+ read(0, inbuf, 1);
+ wmcdda_direction(inbuf[0]);
+ blk->status = WMCDDA_ACK;
+ send_status(blk);
+ break;
+
+ case 'L':
+ read(0, inbuf, 1);
+ loudness = inbuf[0];
+ blk->status = WMCDDA_ACK;
+ send_status(blk);
+ break;
+
+ case 'F':
+ read(0, &namelen, sizeof(namelen));
+ if (output != NULL)
+ {
+ fclose(output);
+ output = NULL;
+ }
+ if (namelen)
+ {
+ filename = malloc(namelen + 1);
+ if (filename == NULL)
+ {
+ perror("cddaslave");
+ wmcdda_close();
+ wmaudio_close();
+ exit(1);
+ }
+
+ read(0, filename, namelen);
+ filename[namelen] = '\0';
+ output = fopen(filename, "w");
+ if (output == NULL)
+ perror(filename);
+ else
+ {
+ /* Write an .au file header. */
+ hdr.magic = htonl(0x2e736e64);
+ hdr.hdr_size = htonl(sizeof(hdr) + 28);
+ hdr.data_size = htonl(~0);
+ hdr.encoding = htonl(3); /* linear-16 */
+ hdr.sample_rate = htonl(44100);
+ hdr.channels = htonl(2);
+
+ fwrite(&hdr, sizeof(hdr), 1, output);
+ fwrite("Recorded from CD by WorkMan", 28, 1,
+ output);
+ }
+
+ free(filename);
+ }
+
+ blk->status = WMCDDA_ACK;
+ send_status(blk);
+ }
+}
+
+/*
+ * Transform some CDDA data.
+ */
+long
+wmcdda_transform(unsigned char *rawbuf, long buflen, struct cdda_block *block)
+{
+ long i;
+ long *buf32 = (long *)rawbuf;
+ register short *buf16 = (short *)rawbuf;
+ register int aval;
+
+ /*
+ * Loudness transformation. Basically this is a self-adjusting
+ * volume control; our goal is to keep the average output level
+ * around a certain value (2500 seems to be pleasing.) We do this
+ * by maintaining a decaying average of the recent output levels
+ * (where "recent" is some fraction of a second.) All output levels
+ * are multiplied by the inverse of the decaying average; this has
+ * the volume-leveling effect we desire, and isn't too CPU-intensive.
+ *
+ * This is done by modifying the digital data, rather than adjusting
+ * the system volume control, because (at least on some systems)
+ * tweaking the system volume can generate little pops and clicks.
+ *
+ * There's probably a more elegant way to achieve this effect, but
+ * what the heck, I never took a DSP class and am making this up as
+ * I go along, with a little help from some friends.
+ *
+ * This is all done with fixed-point math, oriented around powers
+ * of two, which with luck will keep the CPU usage to a minimum.
+ * More could probably be done, for example using lookup tables to
+ * replace multiplies and divides; whether the memory hit (128K
+ * for each table) is worthwhile is unclear.
+ */
+ if (loudness)
+ {
+ /* We aren't really going backwards, but i > 0 is fast */
+ for (i = buflen / 2; i > 0; i--)
+ {
+ /*
+ * Adjust this sample to the current level.
+ */
+ aval = (*buf16 = (((long)*buf16) * volume) >> 15);
+ buf16++;
+
+ /*
+ * Don't adjust the decaying average for each sample;
+ * that just spends CPU time for very little benefit.
+ */
+ if (i & 127)
+ continue;
+
+ /*
+ * We want to use absolute values to compute the
+ * decaying average; otherwise it'd sit around 0.
+ */
+ if (aval < 0)
+ aval = -aval;
+
+ /*
+ * Adjust more quickly when we start hitting peaks,
+ * or we'll get clipping when there's a sudden loud
+ * section after lots of quiet.
+ */
+ if (aval & ~8191)
+ aval <<= 3;
+
+ /*
+ * Adjust the decaying average.
+ */
+ level = ((level << 11) - level + aval) >> 11;
+
+ /*
+ * Let *really* quiet sounds play softly, or we'll
+ * amplify background hiss to full volume and blast
+ * the user's speakers when real sound starts up.
+ */
+ if (! (level & ~511))
+ level = 512;
+
+ /*
+ * And adjust the volume setting using the inverse
+ * of the decaying average.
+ */
+ volume = (2500 << 15) / level;
+ }
+ }
+
+ if (speed == 128)
+ return (buflen);
+
+ /*
+ * Half-speed play. Stretch things out.
+ */
+ if (speed == 0)
+ {
+ buflen /= 2; /* Since we're moving 32 bits at a time */
+
+ for (i = buflen - 1; i > 0; i--)
+ {
+ buf32[i] = buf32[i / 2];
+ }
+
+ buflen *= 4; /* 2 for doubling the buffer, 2 from above */
+ }
+
+ /*
+ * Slow play; can't optimize it as well as half-speed.
+ */
+ if (speed && speed < 128)
+ {
+ int multiplier = ((speed + 128) * 128) / 256;
+ int newlen;
+ int tally = 0, pos;
+
+ buflen /= 4; /* Get the number of 32-bit values */
+
+ /*
+ * Buffer length doubles when speed is 0, stays the same
+ * when speed is 128.
+ */
+ newlen = (buflen * 128) / multiplier;
+
+ pos = buflen - 1;
+ for (i = newlen - 1; i > 0; i--)
+ {
+ buf32[i] = buf32[pos];
+ tally += multiplier;
+ if (tally & 128)
+ {
+ pos--;
+ tally ^= 128;
+ }
+ }
+
+ buflen = newlen * 4;
+ }
+
+ return (buflen);
+}
+
+
+main(argc, argv)
+ char **argv;
+{
+ int cd_fd = 3;
+ fd_set readfd, dummyfd;
+ struct timeval timeout;
+ char *cddabuf;
+ long cddabuflen;
+ struct cdda_block blockinfo;
+ long result;
+ int nfds;
+ char *devname;
+
+ /*
+ * Device name should be the command-line argument.
+ */
+ if (argc < 2)
+ devname = "";
+ else
+ devname = argv[1];
+
+ /*
+ * If we're running setuid root, bump up our priority then lose
+ * superuser access.
+ */
+ nice(-14);
+ setgid(getgid());
+ setuid(getuid());
+ if (getuid() != geteuid())
+ return 255;
+
+ FD_ZERO(&dummyfd);
+ FD_ZERO(&readfd);
+
+ timerclear(&timeout);
+
+ cd_fd = wmcdda_init(&cddabuf, &cddabuflen, cd_fd, devname);
+ if (cd_fd < 0)
+ exit(1);
+ wmaudio_init();
+
+ blockinfo.status = WMCDDA_ACK;
+ send_status(&blockinfo);
+ blockinfo.status = WMCDDA_STOPPED;
+
+fprintf(stderr,"cddaslave: done init.");
+ /*
+ * Accept commands as they come in, and play some sound if we're
+ * supposed to be doing that.
+ */
+ while (1)
+ {
+ FD_SET(0, &readfd);
+
+ /*
+ * If we're playing, we don't want select to block. Otherwise,
+ * wait a little while for the next command.
+ */
+ if (playing)
+ timeout.tv_usec = 0;
+ else
+ timeout.tv_usec = 500000;
+
+ nfds = select(1, &readfd, &dummyfd, &dummyfd, &timeout);
+
+ if (nfds < 0) /* Broken pipe; our GUI exited. */
+ {
+ wmcdda_close(cd_fd);
+ wmaudio_close();
+ fprintf(stderr,"cddaslave: Borken pipe; GUI must have exited.");
+ exit(0);
+ }
+
+ if (FD_ISSET(0, &readfd))
+ {
+ command(cd_fd, &blockinfo);
+ /*
+ * Process all commands in rapid succession, rather
+ * than possibly waiting for a CDDA read.
+ */
+ continue;
+ }
+
+ if (playing)
+ {
+ result = wmcdda_read(cd_fd, cddabuf, cddabuflen,
+ &blockinfo);
+ if (result <= 0)
+ {
+ /* Let the output queue drain. */
+ if (blockinfo.status == WMCDDA_DONE)
+ {
+ wmaudio_mark_last();
+ if (wmaudio_send_status())
+ {
+ /* queue drained, stop polling*/
+ playing = 0;
+ }
+ }
+ else
+ {
+ playing = 0;
+ send_status(&blockinfo);
+ }
+ }
+ else
+ {
+ result = wmcdda_normalize(cddabuf, result,
+ &blockinfo);
+ result = wmcdda_transform(cddabuf, result,
+ &blockinfo);
+ if (output)
+ fwrite(cddabuf, result, 1, output);
+ result = wmaudio_convert(cddabuf, result,
+ &blockinfo);
+ if (wmaudio_play(cddabuf, result, &blockinfo))
+ {
+ playing = 0;
+ wmaudio_stop();
+ send_status(&blockinfo);
+ }
+ }
+ }
+ else
+ send_status(&blockinfo);
+ }
+}
+
+#else /* BUILD_CDDA } { */
+
+#include <stdio.h>
+int main()
+{
+ printf("cddaslave: will work only on Solaris 2.4 or newer.");
+ exit(0);
+}
+
+#endif /* } */
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