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228 lines
5.4 KiB
C
228 lines
5.4 KiB
C
/*
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* camdevice.c - GStreamer hardware CAM support
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* Copyright (C) 2007 Alessandro Decina
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*
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* Authors:
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* Alessandro Decina <alessandro@nnva.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include <glib.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <linux/dvb/ca.h>
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#include "camdevice.h"
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#define GST_CAT_DEFAULT cam_debug_cat
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CamDevice *
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cam_device_new (void)
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{
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CamDevice *device = g_new0 (CamDevice, 1);
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device->state = CAM_DEVICE_STATE_CLOSED;
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return device;
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}
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static void
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reset_state (CamDevice * device)
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{
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if (device->filename) {
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g_free (device->filename);
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device->filename = NULL;
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}
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if (device->fd) {
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close (device->fd);
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device->fd = -1;
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}
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if (device->cas) {
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cam_conditional_access_destroy (device->cas);
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device->cas = NULL;
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}
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if (device->mgr) {
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cam_resource_manager_destroy (device->mgr);
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device->mgr = NULL;
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}
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if (device->info) {
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cam_application_info_destroy (device->info);
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device->info = NULL;
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}
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if (device->al) {
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cam_al_destroy (device->al);
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device->al = NULL;
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}
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if (device->sl) {
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cam_sl_destroy (device->sl);
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device->sl = NULL;
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}
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if (device->tl) {
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cam_tl_destroy (device->tl);
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device->tl = NULL;
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}
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device->state = CAM_DEVICE_STATE_CLOSED;
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}
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void
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cam_device_free (CamDevice * device)
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{
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if (device->state != CAM_DEVICE_STATE_CLOSED)
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GST_WARNING ("device not in CLOSED state when free'd");
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reset_state (device);
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g_free (device);
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}
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gboolean
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cam_device_open (CamDevice * device, const char *filename)
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{
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ca_caps_t ca_caps;
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int ret;
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int i;
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int count = 10;
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g_return_val_if_fail (device != NULL, FALSE);
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g_return_val_if_fail (device->state == CAM_DEVICE_STATE_CLOSED, FALSE);
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g_return_val_if_fail (filename != NULL, FALSE);
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GST_INFO ("opening CA device %s", filename);
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ret = open (filename, O_RDWR);
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if (ret == -1) {
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GST_ERROR ("can't open CA device: %s", g_strerror (errno));
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return FALSE;
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}
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GST_DEBUG ("Successfully opened device %s", filename);
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device->fd = ret;
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ret = ioctl (device->fd, CA_RESET);
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g_usleep (G_USEC_PER_SEC / 10);
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while (TRUE) {
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/* get the capabilities of the CA */
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ret = ioctl (device->fd, CA_GET_CAP, &ca_caps);
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if (ret == -1) {
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GST_ERROR ("CA_GET_CAP ioctl failed: %s", g_strerror (errno));
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reset_state (device);
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return FALSE;
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}
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if (ca_caps.slot_num > 0)
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break;
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if (!count) {
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GST_ERROR ("CA_GET_CAP succeeded but not slots");
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reset_state (device);
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return FALSE;
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}
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count--;
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g_usleep (G_USEC_PER_SEC / 5);
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}
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device->tl = cam_tl_new (device->fd);
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device->sl = cam_sl_new (device->tl);
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device->al = cam_al_new (device->sl);
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device->mgr = cam_resource_manager_new ();
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cam_al_install (device->al, CAM_AL_APPLICATION (device->mgr));
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device->info = cam_application_info_new ();
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cam_al_install (device->al, CAM_AL_APPLICATION (device->info));
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device->cas = cam_conditional_access_new ();
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cam_al_install (device->al, CAM_AL_APPLICATION (device->cas));
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/* open a connection to each slot */
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for (i = 0; i < ca_caps.slot_num; ++i) {
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CamTLConnection *connection;
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ret = cam_tl_create_connection (device->tl, i, &connection);
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if (CAM_FAILED (ret)) {
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/* just ignore the slot, error out later only if no connection has been
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* established */
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GST_WARNING ("connection to slot %d failed, error: %d", i, ret);
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continue;
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}
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}
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if (g_hash_table_size (device->tl->connections) == 0) {
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GST_ERROR ("couldn't connect to any slot");
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reset_state (device);
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return FALSE;
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}
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device->state = CAM_DEVICE_STATE_OPEN;
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device->filename = g_strdup (filename);
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/* poll each connection to initiate the protocol */
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cam_tl_read_all (device->tl, TRUE);
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return TRUE;
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}
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void
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cam_device_close (CamDevice * device)
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{
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g_return_if_fail (device != NULL);
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g_return_if_fail (device->state == CAM_DEVICE_STATE_OPEN);
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GST_INFO ("closing CA device %s", device->filename);
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reset_state (device);
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}
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void
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cam_device_poll (CamDevice * device)
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{
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g_return_if_fail (device != NULL);
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g_return_if_fail (device->state == CAM_DEVICE_STATE_OPEN);
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cam_tl_read_all (device->tl, TRUE);
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}
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gboolean
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cam_device_ready (CamDevice * device)
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{
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g_return_val_if_fail (device != NULL, FALSE);
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g_return_val_if_fail (device->state == CAM_DEVICE_STATE_OPEN, FALSE);
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return device->cas->ready;
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}
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void
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cam_device_set_pmt (CamDevice * device,
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GstMpegTsPMT * pmt, CamConditionalAccessPmtFlag flag)
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{
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g_return_if_fail (device != NULL);
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g_return_if_fail (device->state == CAM_DEVICE_STATE_OPEN);
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g_return_if_fail (pmt != NULL);
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cam_conditional_access_set_pmt (device->cas, pmt, flag);
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cam_tl_read_all (device->tl, FALSE);
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}
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