Imported Upstream version 1.1.1upstream/1.1.1

1 files changed, 392 insertions, 0 deletions

diff --git a/util/szap/azap.c b/util/szap/azap.c
new file mode 100644
index 0000000..14a1c6a
--- /dev/null
+++ b/util/szap/azap.c
@@ -0,0 +1,392 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <errno.h>
+
+#include <linux/dvb/frontend.h>
+#include <linux/dvb/dmx.h>
+
+static char FRONTEND_DEV [80];
+static char DEMUX_DEV [80];
+
+#define CHANNEL_FILE "/.azap/channels.conf"
+
+#define ERROR(x...)                                                     \
+        do {                                                            \
+                fprintf(stderr, "ERROR: ");                             \
+                fprintf(stderr, x);                                     \
+                fprintf (stderr, "\n");                                 \
+        } while (0)
+
+#define PERROR(x...)                                                    \
+        do {                                                            \
+                fprintf(stderr, "ERROR: ");                             \
+                fprintf(stderr, x);                                     \
+                fprintf (stderr, " (%s)\n", strerror(errno));		\
+        } while (0)
+
+
+typedef struct {
+	char *name;
+	int value;
+} Param;
+
+static const Param modulation_list [] = {
+	{ "8VSB", VSB_8 },
+	{ "16VSB", VSB_16 },
+	{ "QAM_64", QAM_64 },
+	{ "QAM_256", QAM_256 },
+};
+
+#define LIST_SIZE(x) sizeof(x)/sizeof(Param)
+
+
+static
+int parse_param (int fd, const Param * plist, int list_size, int *param)
+{
+	char c;
+	int character = 0;
+	int _index = 0;
+
+	while (1) {
+		if (read(fd, &c, 1) < 1)
+			return -1;	/*  EOF? */
+
+		if ((c == ':' || c == '\n')
+		    && plist->name[character] == '\0')
+			break;
+
+		while (toupper(c) != plist->name[character]) {
+			_index++;
+			plist++;
+			if (_index >= list_size)	 /*  parse error, no valid */
+				return -2;	 /*  parameter name found  */
+		}
+
+		character++;
+	}
+
+	*param = plist->value;
+
+	return 0;
+}
+
+
+static
+int parse_int(int fd, int *val)
+{
+	char number[11];	/* 2^32 needs 10 digits... */
+	int character = 0;
+
+	while (1) {
+		if (read(fd, &number[character], 1) < 1)
+			return -1;	/*  EOF? */
+
+		if (number[character] == ':' || number[character] == '\n') {
+			number[character] = '\0';
+			break;
+		}
+
+		if (!isdigit(number[character]))
+			return -2;	/*  parse error, not a digit... */
+
+		character++;
+
+		if (character > 10)	/*  overflow, number too big */
+			return -3;	/*  to fit in 32 bit */
+	};
+
+	*val = strtol(number, NULL, 10);
+
+	return 0;
+}
+
+
+static
+int find_channel(int fd, const char *channel)
+{
+	int character = 0;
+
+	while (1) {
+		char c;
+
+		if (read(fd, &c, 1) < 1)
+			return -1;	/*  EOF! */
+
+		if (c == ':' && channel[character] == '\0')
+			break;
+
+		if (toupper(c) == toupper(channel[character]))
+			character++;
+		else
+			character = 0;
+	};
+
+	return 0;
+}
+
+
+static
+int try_parse_int(int fd, int *val, const char *pname)
+{
+	int err;
+
+	err = parse_int(fd, val);
+
+	if (err)
+		ERROR("error while parsing %s (%s)", pname,
+		      err == -1 ? "end of file" :
+		      err == -2 ? "not a number" : "number too big");
+
+	return err;
+}
+
+
+static
+int try_parse_param(int fd, const Param * plist, int list_size, int *param,
+		    const char *pname)
+{
+	int err;
+
+	err = parse_param(fd, plist, list_size, param);
+
+	if (err)
+		ERROR("error while parsing %s (%s)", pname,
+		      err == -1 ? "end of file" : "syntax error");
+
+	return err;
+}
+
+
+int parse(const char *fname, const char *channel,
+	  struct dvb_frontend_parameters *frontend, int *vpid, int *apid)
+{
+	int fd;
+	int err;
+	int tmp;
+
+	if ((fd = open(fname, O_RDONLY | O_NONBLOCK)) < 0) {
+		PERROR ("could not open file '%s'", fname);
+		perror ("");
+		return -1;
+	}
+
+	if (find_channel(fd, channel) < 0) {
+		ERROR("could not find channel '%s' in channel list", channel);
+		return -2;
+	}
+
+	if ((err = try_parse_int(fd, &tmp, "frequency")))
+		return -3;
+	frontend->frequency = tmp;
+
+	if ((err = try_parse_param(fd,
+				   modulation_list, LIST_SIZE(modulation_list),
+				   (int *) &frontend->u.vsb.modulation,
+				   "modulation")))
+		return -4;
+
+	if ((err = try_parse_int(fd, vpid, "Video PID")))
+		return -5;
+
+	if ((err = try_parse_int(fd, apid, "Audio PID")))
+		return -6;
+
+	close(fd);
+
+	return 0;
+}
+
+
+static
+int set_pesfilter (int fd, int pid, dmx_pes_type_t type, int dvr)
+{
+        struct dmx_pes_filter_params pesfilter;
+
+        if (pid <= 0 || pid >= 0x1fff)
+                return 0;
+
+        pesfilter.pid = pid;
+        pesfilter.input = DMX_IN_FRONTEND;
+        pesfilter.output = dvr ? DMX_OUT_TS_TAP : DMX_OUT_DECODER;
+        pesfilter.pes_type = type;
+        pesfilter.flags = DMX_IMMEDIATE_START;
+
+        if (ioctl(fd, DMX_SET_PES_FILTER, &pesfilter) < 0) {
+                PERROR ("ioctl(DMX_SET_PES_FILTER) for %s PID failed",
+                        type == DMX_PES_AUDIO ? "Audio" :
+                        type == DMX_PES_VIDEO ? "Video" : "??");
+                return -1;
+        }
+
+        return 0;
+}
+
+
+static
+int setup_frontend (int fe_fd, struct dvb_frontend_parameters *frontend)
+{
+	struct dvb_frontend_info fe_info;
+
+	if (ioctl(fe_fd, FE_GET_INFO, &fe_info) < 0) {
+		PERROR("ioctl FE_GET_INFO failed");
+		return -1;
+	}
+
+	if (fe_info.type != FE_ATSC) {
+		ERROR ("frontend device is not an ATSC (VSB/QAM) device");
+		return -1;
+	}
+
+	printf ("tuning to %i Hz\n", frontend->frequency);
+
+	if (ioctl(fe_fd, FE_SET_FRONTEND, frontend) < 0) {
+		PERROR("ioctl FE_SET_FRONTEND failed");
+		return -1;
+	}
+
+	return 0;
+}
+
+
+static
+int check_frontend (int fe_fd)
+{
+	fe_status_t status;
+	uint16_t snr, signal;
+	uint32_t ber, uncorrected_blocks;
+
+	do {
+		ioctl(fe_fd, FE_READ_STATUS, &status);
+		ioctl(fe_fd, FE_READ_SIGNAL_STRENGTH, &signal);
+		ioctl(fe_fd, FE_READ_SNR, &snr);
+		ioctl(fe_fd, FE_READ_BER, &ber);
+		ioctl(fe_fd, FE_READ_UNCORRECTED_BLOCKS, &uncorrected_blocks);
+
+		printf ("status %02x | signal %04x | snr %04x | "
+			"ber %08x | unc %08x | ",
+			status, signal, snr, ber, uncorrected_blocks);
+
+		if (status & FE_HAS_LOCK)
+			printf("FE_HAS_LOCK");
+
+		usleep(1000000);
+
+		printf("\n");
+	} while (1);
+
+	return 0;
+}
+
+
+static const char *usage = "\nusage: %s [-a adapter_num] [-f frontend_id] [-d demux_id] [-c conf_file] [-r] <channel name>\n\n";
+
+
+int main(int argc, char **argv)
+{
+	struct dvb_frontend_parameters frontend_param;
+	char *homedir = getenv ("HOME");
+	char *confname = NULL;
+	char *channel = NULL;
+	int adapter = 0, frontend = 0, demux = 0, dvr = 0;
+	int vpid, apid;
+	int frontend_fd, audio_fd, video_fd;
+	int opt;
+
+	while ((opt = getopt(argc, argv, "hrn:a:f:d:c:")) != -1) {
+		switch (opt) {
+		case 'a':
+			adapter = strtoul(optarg, NULL, 0);
+			break;
+		case 'f':
+			frontend = strtoul(optarg, NULL, 0);
+			break;
+		case 'd':
+			demux = strtoul(optarg, NULL, 0);
+			break;
+		case 'r':
+			dvr = 1;
+			break;
+		case 'c':
+			confname = optarg;
+			break;
+		case '?':
+		case 'h':
+		default:
+			fprintf (stderr, usage, argv[0]);
+			return -1;
+		};
+	}
+
+	if (optind < argc)
+		channel = argv[optind];
+
+	if (!channel) {
+		fprintf (stderr, usage, argv[0]);
+		return -1;
+	}
+
+	snprintf (FRONTEND_DEV, sizeof(FRONTEND_DEV),
+		  "/dev/dvb/adapter%i/frontend%i", adapter, frontend);
+
+	snprintf (DEMUX_DEV, sizeof(DEMUX_DEV),
+		  "/dev/dvb/adapter%i/demux%i", adapter, demux);
+
+	printf ("using '%s' and '%s'\n", FRONTEND_DEV, DEMUX_DEV);
+
+	if (!confname)
+	{
+		if (!homedir)
+			ERROR ("$HOME not set");
+		confname = malloc (strlen(homedir) + strlen(CHANNEL_FILE) + 1);
+		memcpy (confname, homedir, strlen(homedir));
+		memcpy (confname + strlen(homedir), CHANNEL_FILE,
+	        	strlen(CHANNEL_FILE) + 1);
+	}
+
+	memset(&frontend_param, 0, sizeof(struct dvb_frontend_parameters));
+
+	if (parse (confname, channel, &frontend_param, &vpid, &apid))
+		return -1;
+
+	if ((frontend_fd = open(FRONTEND_DEV, O_RDWR)) < 0) {
+		PERROR ("failed opening '%s'", FRONTEND_DEV);
+		return -1;
+	}
+
+	if (setup_frontend (frontend_fd, &frontend_param) < 0)
+		return -1;
+
+        if ((video_fd = open(DEMUX_DEV, O_RDWR)) < 0) {
+                PERROR("failed opening '%s'", DEMUX_DEV);
+                return -1;
+        }
+
+	printf ("video pid 0x%04x, audio pid 0x%04x\n", vpid, apid);
+	if (set_pesfilter (video_fd, vpid, DMX_PES_VIDEO, dvr) < 0)
+		return -1;
+
+	if ((audio_fd = open(DEMUX_DEV, O_RDWR)) < 0) {
+                PERROR("failed opening '%s'", DEMUX_DEV);
+                return -1;
+        }
+
+	if (set_pesfilter (audio_fd, apid, DMX_PES_AUDIO, dvr) < 0)
+		return -1;
+
+	check_frontend (frontend_fd);
+
+	close (audio_fd);
+	close (video_fd);
+	close (frontend_fd);
+
+	return 0;
+}
+