int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter) { int i; if (dmxdev->demux->open(dmxdev->demux) < 0) return -EUSERS; dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter)); if (!dmxdev->filter) return -ENOMEM; mutex_init(&dmxdev->mutex); spin_lock_init(&dmxdev->lock); for (i = 0; i < dmxdev->filternum; i++) { dmxdev->filter[i].dev = dmxdev; dmxdev->filter[i].buffer.data = NULL; dvb_dmxdev_filter_state_set(&dmxdev->filter[i], DMXDEV_STATE_FREE); } dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev, DVB_DEVICE_DEMUX); dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr, dmxdev, DVB_DEVICE_DVR); dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192); return 0; }
static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev, struct dmxdev_filter *dmxdevfilter) { if (mutex_lock_interruptible(&dmxdev->mutex)) return -ERESTARTSYS; if (mutex_lock_interruptible(&dmxdevfilter->mutex)) { mutex_unlock(&dmxdev->mutex); return -ERESTARTSYS; } dvb_dmxdev_filter_stop(dmxdevfilter); dvb_dmxdev_filter_reset(dmxdevfilter); if (dmxdevfilter->buffer.data) { void *mem = dmxdevfilter->buffer.data; spin_lock_irq(&dmxdev->lock); dmxdevfilter->buffer.data = NULL; spin_unlock_irq(&dmxdev->lock); vfree(mem); } dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE); wake_up(&dmxdevfilter->buffer.queue); mutex_unlock(&dmxdevfilter->mutex); mutex_unlock(&dmxdev->mutex); return 0; }
static int dvb_demux_open(struct inode *inode, struct file *file) { struct dvb_device *dvbdev = file->private_data; struct dmxdev *dmxdev = dvbdev->priv; int i; struct dmxdev_filter *dmxdevfilter; if (!dmxdev->filter) return -EINVAL; if (mutex_lock_interruptible(&dmxdev->mutex)) return -ERESTARTSYS; for (i = 0; i < dmxdev->filternum; i++) if (dmxdev->filter[i].state == DMXDEV_STATE_FREE) break; if (i == dmxdev->filternum) { mutex_unlock(&dmxdev->mutex); return -EMFILE; } dmxdevfilter = &dmxdev->filter[i]; mutex_init(&dmxdevfilter->mutex); file->private_data = dmxdevfilter; dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192); dmxdevfilter->type = DMXDEV_TYPE_NONE; dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED); dmxdevfilter->feed.ts = NULL; init_timer(&dmxdevfilter->timer); mutex_unlock(&dmxdev->mutex); return 0; }
static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter) { if (dmxdevfilter->state < DMXDEV_STATE_SET) return 0; dmxdevfilter->type = DMXDEV_TYPE_NONE; dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED); return 0; }
/* start feed associated with the specified filter */ static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter) { dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO); switch (filter->type) { case DMXDEV_TYPE_SEC: return filter->feed.sec->start_filtering(filter->feed.sec); case DMXDEV_TYPE_PES: return filter->feed.ts->start_filtering(filter->feed.ts); default: return -EINVAL; } return 0; }
/* stop feed but only mark the specified filter as stopped (state set) */ static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter) { dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET); switch (dmxdevfilter->type) { case DMXDEV_TYPE_SEC: del_timer(&dmxdevfilter->timer); dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec); break; case DMXDEV_TYPE_PES: dmxdevfilter->feed.ts->stop_filtering(dmxdevfilter->feed.ts); break; default: return -EINVAL; } return 0; }
static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev, struct dmxdev_filter *dmxdevfilter, struct dmx_sct_filter_params *params) { dprintk("function : %s\n", __func__); dvb_dmxdev_filter_stop(dmxdevfilter); dmxdevfilter->type = DMXDEV_TYPE_SEC; memcpy(&dmxdevfilter->params.sec, params, sizeof(struct dmx_sct_filter_params)); invert_mode(&dmxdevfilter->params.sec.filter); dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET); if (params->flags & DMX_IMMEDIATE_START) return dvb_dmxdev_filter_start(dmxdevfilter); return 0; }
static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev, struct dmxdev_filter *dmxdevfilter, struct dmx_pes_filter_params *params) { dvb_dmxdev_filter_stop(dmxdevfilter); if (params->pes_type > DMX_PES_OTHER || params->pes_type < 0) return -EINVAL; dmxdevfilter->type = DMXDEV_TYPE_PES; memcpy(&dmxdevfilter->params, params, sizeof(struct dmx_pes_filter_params)); dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET); if (params->flags & DMX_IMMEDIATE_START) return dvb_dmxdev_filter_start(dmxdevfilter); return 0; }
static int dvb_demux_open(struct inode *inode, struct file *file) { struct dvb_device *dvbdev=(struct dvb_device *) file->private_data; struct dmxdev *dmxdev=(struct dmxdev *) dvbdev->priv; int i; struct dmxdev_filter *dmxdevfilter; if (!dmxdev->filter) return -EINVAL; if (down_interruptible(&dmxdev->mutex)) return -ERESTARTSYS; for (i=0; i<dmxdev->filternum; i++) if (dmxdev->filter[i].state==DMXDEV_STATE_FREE) break; if (i==dmxdev->filternum) { up(&dmxdev->mutex); return -EMFILE; } dmxdevfilter=&dmxdev->filter[i]; sema_init(&dmxdevfilter->mutex, 1); dmxdevfilter->dvbdev=dmxdev->dvbdev; file->private_data=dmxdevfilter; dvb_dmxdev_buffer_init(&dmxdevfilter->buffer); dmxdevfilter->type=DMXDEV_TYPE_NONE; dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED); dmxdevfilter->feed.ts=0; init_timer(&dmxdevfilter->timer); up(&dmxdev->mutex); return 0; }
static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter) { struct dmxdev *dmxdev = filter->dev; void *mem; int ret, i; if (filter->state < DMXDEV_STATE_SET) return -EINVAL; if (filter->state >= DMXDEV_STATE_GO) dvb_dmxdev_filter_stop(filter); if (!filter->buffer.data) { mem = vmalloc(filter->buffer.size); if (!mem) return -ENOMEM; spin_lock_irq(&filter->dev->lock); filter->buffer.data = mem; spin_unlock_irq(&filter->dev->lock); } dvb_ringbuffer_flush(&filter->buffer); switch (filter->type) { case DMXDEV_TYPE_SEC: { struct dmx_sct_filter_params *para = &filter->params.sec; struct dmx_section_filter **secfilter = &filter->filter.sec; struct dmx_section_feed **secfeed = &filter->feed.sec; *secfilter = NULL; *secfeed = NULL; /* find active filter/feed with same PID */ for (i = 0; i < dmxdev->filternum; i++) { if (dmxdev->filter[i].state >= DMXDEV_STATE_GO && dmxdev->filter[i].type == DMXDEV_TYPE_SEC && dmxdev->filter[i].params.sec.pid == para->pid) { *secfeed = dmxdev->filter[i].feed.sec; break; } } /* if no feed found, try to allocate new one */ if (!*secfeed) { ret = dmxdev->demux->allocate_section_feed(dmxdev->demux, secfeed, dvb_dmxdev_section_callback); if (ret < 0) { printk("DVB (%s): could not alloc feed\n", __func__); return ret; } ret = (*secfeed)->set(*secfeed, para->pid, 32768, (para->flags & DMX_CHECK_CRC) ? 1 : 0); if (ret < 0) { printk("DVB (%s): could not set feed\n", __func__); dvb_dmxdev_feed_restart(filter); return ret; } } else { dvb_dmxdev_feed_stop(filter); } ret = (*secfeed)->allocate_filter(*secfeed, secfilter); if (ret < 0) { dvb_dmxdev_feed_restart(filter); filter->feed.sec->start_filtering(*secfeed); dprintk("could not get filter\n"); return ret; } (*secfilter)->priv = filter; memcpy(&((*secfilter)->filter_value[3]), &(para->filter.filter[1]), DMX_FILTER_SIZE - 1); memcpy(&(*secfilter)->filter_mask[3], ¶->filter.mask[1], DMX_FILTER_SIZE - 1); memcpy(&(*secfilter)->filter_mode[3], ¶->filter.mode[1], DMX_FILTER_SIZE - 1); (*secfilter)->filter_value[0] = para->filter.filter[0]; (*secfilter)->filter_mask[0] = para->filter.mask[0]; (*secfilter)->filter_mode[0] = para->filter.mode[0]; (*secfilter)->filter_mask[1] = 0; (*secfilter)->filter_mask[2] = 0; filter->todo = 0; ret = filter->feed.sec->start_filtering(filter->feed.sec); if (ret < 0) return ret; dvb_dmxdev_filter_timer(filter); break; } case DMXDEV_TYPE_PES: { struct timespec timeout = { 0 }; struct dmx_pes_filter_params *para = &filter->params.pes; dmx_output_t otype; int ret; int ts_type; enum dmx_ts_pes ts_pes; struct dmx_ts_feed **tsfeed = &filter->feed.ts; filter->feed.ts = NULL; otype = para->output; ts_pes = (enum dmx_ts_pes)para->pes_type; if (ts_pes < DMX_PES_OTHER) ts_type = TS_DECODER; else ts_type = 0; if (otype == DMX_OUT_TS_TAP) ts_type |= TS_PACKET; else if (otype == DMX_OUT_TSDEMUX_TAP) ts_type |= TS_PACKET | TS_DEMUX; else if (otype == DMX_OUT_TAP) ts_type |= TS_PACKET | TS_DEMUX | TS_PAYLOAD_ONLY; ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux, tsfeed, dvb_dmxdev_ts_callback); if (ret < 0) return ret; (*tsfeed)->priv = filter; ret = (*tsfeed)->set(*tsfeed, para->pid, ts_type, ts_pes, 32768, timeout); if (ret < 0) { dmxdev->demux->release_ts_feed(dmxdev->demux, *tsfeed); return ret; } ret = filter->feed.ts->start_filtering(filter->feed.ts); if (ret < 0) { dmxdev->demux->release_ts_feed(dmxdev->demux, *tsfeed); return ret; } break; } default: return -EINVAL; } dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO); return 0; }