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/*
* camdevice.c - GStreamer hardware CAM support
* Copyright (C) 2007 Alessandro Decina
*
* Authors:
* Alessandro Decina <alessandro@nnva.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library 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.
*/
#include <glib.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <linux/dvb/ca.h>
#include "camdevice.h"
#define GST_CAT_DEFAULT cam_debug_cat
CamDevice *
cam_device_new (void)
{
CamDevice *device = g_new0 (CamDevice, 1);
device->state = CAM_DEVICE_STATE_CLOSED;
return device;
}
static void
reset_state (CamDevice * device)
{
if (device->filename) {
g_free (device->filename);
device->filename = NULL;
}
if (device->fd) {
close (device->fd);
device->fd = -1;
}
if (device->cas) {
cam_conditional_access_destroy (device->cas);
device->cas = NULL;
}
if (device->mgr) {
cam_resource_manager_destroy (device->mgr);
device->mgr = NULL;
}
if (device->info) {
cam_application_info_destroy (device->info);
device->info = NULL;
}
if (device->al) {
cam_al_destroy (device->al);
device->al = NULL;
}
if (device->sl) {
cam_sl_destroy (device->sl);
device->sl = NULL;
}
if (device->tl) {
cam_tl_destroy (device->tl);
device->tl = NULL;
}
device->state = CAM_DEVICE_STATE_CLOSED;
}
void
cam_device_free (CamDevice * device)
{
if (device->state != CAM_DEVICE_STATE_CLOSED)
GST_WARNING ("device not in CLOSED state when free'd");
reset_state (device);
g_free (device);
}
gboolean
cam_device_open (CamDevice * device, const char *filename)
{
ca_caps_t ca_caps;
int ret;
int i;
g_return_val_if_fail (device != NULL, FALSE);
g_return_val_if_fail (device->state == CAM_DEVICE_STATE_CLOSED, FALSE);
g_return_val_if_fail (filename != NULL, FALSE);
GST_INFO ("opening ca device %s", filename);
ret = open (filename, O_RDWR);
if (ret == -1) {
GST_ERROR ("can't open ca device: %s", strerror (errno));
return FALSE;
}
device->fd = ret;
ret = ioctl (device->fd, CA_RESET);
sleep (1);
/* get the capabilities of the CA */
ret = ioctl (device->fd, CA_GET_CAP, &ca_caps);
if (ret == -1) {
GST_ERROR ("CA_GET_CAP ioctl failed: %s", strerror (errno));
reset_state (device);
return FALSE;
}
device->tl = cam_tl_new (device->fd);
device->sl = cam_sl_new (device->tl);
device->al = cam_al_new (device->sl);
device->mgr = cam_resource_manager_new ();
cam_al_install (device->al, CAM_AL_APPLICATION (device->mgr));
device->info = cam_application_info_new ();
cam_al_install (device->al, CAM_AL_APPLICATION (device->info));
device->cas = cam_conditional_access_new ();
cam_al_install (device->al, CAM_AL_APPLICATION (device->cas));
/* open a connection to each slot */
for (i = 0; i < ca_caps.slot_num; ++i) {
CamTLConnection *connection;
ret = cam_tl_create_connection (device->tl, i, &connection);
if (CAM_FAILED (ret)) {
/* just ignore the slot, error out later only if no connection has been
* established */
GST_WARNING ("connection to slot %d failed, error: %d", i, ret);
continue;
}
}
if (g_hash_table_size (device->tl->connections) == 0) {
GST_ERROR ("couldn't connect to any slot");
reset_state (device);
return FALSE;
}
device->state = CAM_DEVICE_STATE_OPEN;
device->filename = g_strdup (filename);
/* poll each connection to initiate the protocol */
cam_tl_read_all (device->tl, TRUE);
return TRUE;
}
void
cam_device_close (CamDevice * device)
{
g_return_if_fail (device != NULL);
g_return_if_fail (device->state == CAM_DEVICE_STATE_OPEN);
GST_INFO ("closing ca device %s", device->filename);
reset_state (device);
}
void
cam_device_poll (CamDevice * device)
{
g_return_if_fail (device != NULL);
g_return_if_fail (device->state == CAM_DEVICE_STATE_OPEN);
cam_tl_read_all (device->tl, TRUE);
}
gboolean
cam_device_ready (CamDevice * device)
{
g_return_val_if_fail (device != NULL, FALSE);
g_return_val_if_fail (device->state == CAM_DEVICE_STATE_OPEN, FALSE);
return device->cas->ready;
}
void
cam_device_set_pmt (CamDevice * device,
GstStructure * pmt, CamConditionalAccessPmtFlag flag)
{
g_return_if_fail (device != NULL);
g_return_if_fail (device->state == CAM_DEVICE_STATE_OPEN);
g_return_if_fail (pmt != NULL);
cam_conditional_access_set_pmt (device->cas, pmt, flag);
cam_tl_read_all (device->tl, FALSE);
}
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