/* * TV Input - Linux analogue (v4lv2) interface * Copyright (C) 2007 Andreas Öman * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ #include #include #include #include #include #include #include #include #include #include #include #define __user #include #include #include "tvhead.h" #include "v4l.h" #include "channels.h" #include "dispatch.h" #include "transports.h" struct th_v4l_adapter_list v4l_adapters; static void v4l_fd_callback(int events, void *opaque, int fd); static int v4l_setfreq(th_v4l_adapter_t *tva, int frequency); static void v4l_add_adapter(const char *path); static void v4l_stop_feed(th_transport_t *t); static int v4l_start_feed(th_transport_t *t, unsigned int weight, int status); /* * */ void v4l_init(void) { v4l_add_adapter("/dev/video0"); } /* * */ int v4l_configure_transport(th_transport_t *t, const char *muxname, const char *channel_name) { config_entry_t *ce; char buf[100]; if((ce = find_mux_config("v4lmux", muxname)) == NULL) return -1; t->tht_type = TRANSPORT_V4L; t->tht_start_feed = v4l_start_feed; t->tht_stop_feed = v4l_stop_feed; t->tht_v4l_frequency = atoi(config_get_str_sub(&ce->ce_sub, "frequency", "0")); t->tht_video = transport_add_stream(t, -1, HTSTV_MPEG2VIDEO); t->tht_audio = transport_add_stream(t, -1, HTSTV_MPEG2AUDIO); snprintf(buf, sizeof(buf), "Analog: %s (%.2f MHz)", muxname, (float)t->tht_v4l_frequency / 1000000.0f); t->tht_name = strdup(buf); t->tht_network = strdup("Analog TV"); t->tht_provider = strdup("Analog TV"); snprintf(buf, sizeof(buf), "ANALOG:%u", t->tht_v4l_frequency); t->tht_uniquename = strdup(buf); transport_link(t, channel_find(channel_name, 1, NULL), THT_OTHER); return 0; } /* * */ static void v4l_add_adapter(const char *path) { int fd, r; th_v4l_adapter_t *tva; struct v4l2_capability caps; fd = open(path, O_RDWR); if(fd == -1) return; r = ioctl(fd, VIDIOC_QUERYCAP, &caps); close(fd); if(r < 0) return; tva = calloc(1, sizeof(th_v4l_adapter_t)); pthread_cond_init(&tva->tva_run_cond, NULL); tva->tva_path = strdup(path); LIST_INSERT_HEAD(&v4l_adapters, tva, tva_link); tva->tva_name = strdup((char *)caps.card); } /* * */ static int v4l_setfreq(th_v4l_adapter_t *tva, int frequency) { struct v4l2_frequency vf; struct v4l2_tuner vt; int result; memset(&vf, 0, sizeof(vf)); memset(&vt, 0, sizeof(vt)); vf.tuner = 0; vf.type = V4L2_TUNER_ANALOG_TV; vf.frequency = (frequency * 16) / 1000000; result = ioctl(tva->tva_fd, VIDIOC_S_FREQUENCY, &vf); if(result < 0) { syslog(LOG_ERR, "%s: Unable to tune to %dHz\n", tva->tva_path, frequency); return 1; } vt.index = 0; result = ioctl(tva->tva_fd, VIDIOC_G_TUNER, &vt); if(result < 0) { syslog(LOG_ERR, "%s: Unable read tuner status\n", tva->tva_path); return 1; } syslog(LOG_DEBUG, "%s: Tuned to %.3f MHz%s", tva->tva_path, (float)frequency/1000000.0, vt.signal ? " (Signal Detected)" : ""); return 0; } /* * */ static void v4l_stop(th_v4l_adapter_t *tva) { if(tva->tva_dispatch_handle != NULL) { close(dispatch_delfd(tva->tva_dispatch_handle)); tva->tva_dispatch_handle = NULL; } tva->tva_startcode = 0; } /* * */ static void v4l_stop_feed(th_transport_t *t) { th_v4l_adapter_t *tva = t->tht_v4l_adapter; t->tht_v4l_adapter = NULL; LIST_REMOVE(t, tht_adapter_link); t->tht_status = TRANSPORT_IDLE; if(LIST_FIRST(&tva->tva_transports) == NULL) v4l_stop(tva); } /* * */ static void v4l_adapter_clean(th_v4l_adapter_t *tva) { th_transport_t *t; while((t = LIST_FIRST(&tva->tva_transports)) != NULL) v4l_stop_feed(t); v4l_stop(tva); } /* * */ static int v4l_start_feed(th_transport_t *t, unsigned int weight, int status) { th_v4l_adapter_t *tva, *cand = NULL; int w, fd; LIST_FOREACH(tva, &v4l_adapters, tva_link) { w = transport_compute_weight(&tva->tva_transports); if(w < weight) cand = tva; if(tva->tva_frequency == t->tht_v4l_frequency) break; } if(tva == NULL) { if(cand == NULL) return 1; v4l_adapter_clean(cand); tva = cand; } if(tva->tva_dispatch_handle == NULL) { fd = open(tva->tva_path, O_RDWR); if(fd == -1) return 1; tva->tva_dispatch_handle = dispatch_addfd(fd, v4l_fd_callback, tva, DISPATCH_READ); tva->tva_fd = fd; } tva->tva_frequency = t->tht_v4l_frequency; if(v4l_setfreq(tva, tva->tva_frequency)) return 1; LIST_INSERT_HEAD(&tva->tva_transports, t, tht_adapter_link); t->tht_v4l_adapter = tva; t->tht_status = TRANSPORT_RUNNING; return 0; } static void v4l_fd_callback(int events, void *opaque, int fd) { th_v4l_adapter_t *tva = opaque; th_transport_t *t; th_stream_t *st; uint8_t buf[4000]; uint8_t *ptr, *pkt; int len, l, r; if(!(events & DISPATCH_READ)) return; len = read(fd, buf, 4000); if(len < 1) return; t = LIST_FIRST(&tva->tva_transports); if(t == NULL) return; ptr = buf; while(len > 0) { switch(tva->tva_startcode) { default: tva->tva_startcode = tva->tva_startcode << 8 | *ptr; tva->tva_lenlock = 0; ptr++; len--; continue; case 0x000001e0: st = t->tht_video; break; case 0x000001c0: st = t->tht_audio; break; } if(tva->tva_lenlock == 2) { l = st->st_buffer_size; st->st_buffer = pkt = realloc(st->st_buffer, l); r = l - st->st_buffer_ptr; if(r > len) r = len; memcpy(pkt + st->st_buffer_ptr, ptr, r); ptr += r; len -= r; st->st_buffer_ptr += r; if(st->st_buffer_ptr == l) { // pes_packet_input(t, st, pkt, l); st->st_buffer_size = 0; tva->tva_startcode = 0; } } else { st->st_buffer_size = st->st_buffer_size << 8 | *ptr; tva->tva_lenlock++; if(tva->tva_lenlock == 2) { st->st_buffer_ptr = 0; } ptr++; len--; } } }