1 files changed, 212 insertions, 0 deletions

diff --git a/include/media/dmxdev.h b/include/media/dmxdev.h
new file mode 100644
index 000000000000..2f5cb2c7b6a7
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+++ b/include/media/dmxdev.h
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+/*
+ * dmxdev.h
+ *
+ * Copyright (C) 2000 Ralph Metzler & Marcus Metzler
+ *                    for convergence integrated media GmbH
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1
+ * 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.
+ *
+ */
+
+#ifndef _DMXDEV_H_
+#define _DMXDEV_H_
+
+#include <linux/types.h>
+#include <linux/spinlock.h>
+#include <linux/kernel.h>
+#include <linux/time.h>
+#include <linux/timer.h>
+#include <linux/wait.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+
+#include <linux/dvb/dmx.h>
+
+#include <media/dvbdev.h>
+#include <media/demux.h>
+#include <media/dvb_ringbuffer.h>
+#include <media/dvb_vb2.h>
+
+/**
+ * enum dmxdev_type - type of demux filter type.
+ *
+ * @DMXDEV_TYPE_NONE:   no filter set.
+ * @DMXDEV_TYPE_SEC:    section filter.
+ * @DMXDEV_TYPE_PES:    Program Elementary Stream (PES) filter.
+ */
+enum dmxdev_type {
+        DMXDEV_TYPE_NONE,
+        DMXDEV_TYPE_SEC,
+        DMXDEV_TYPE_PES,
+};
+
+/**
+ * enum dmxdev_state - state machine for the dmxdev.
+ *
+ * @DMXDEV_STATE_FREE:          indicates that the filter is freed.
+ * @DMXDEV_STATE_ALLOCATED:     indicates that the filter was allocated
+ *                              to be used.
+ * @DMXDEV_STATE_SET:           indicates that the filter parameters are set.
+ * @DMXDEV_STATE_GO:            indicates that the filter is running.
+ * @DMXDEV_STATE_DONE:          indicates that a packet was already filtered
+ *                              and the filter is now disabled.
+ *                              Set only if %DMX_ONESHOT. See
+ *                              &dmx_sct_filter_params.
+ * @DMXDEV_STATE_TIMEDOUT:      Indicates a timeout condition.
+ */
+enum dmxdev_state {
+        DMXDEV_STATE_FREE,
+        DMXDEV_STATE_ALLOCATED,
+        DMXDEV_STATE_SET,
+        DMXDEV_STATE_GO,
+        DMXDEV_STATE_DONE,
+        DMXDEV_STATE_TIMEDOUT
+};
+
+/**
+ * struct dmxdev_feed - digital TV dmxdev feed
+ *
+ * @pid:        Program ID to be filtered
+ * @ts:         pointer to &struct dmx_ts_feed
+ * @next:       &struct list_head pointing to the next feed.
+ */
+
+struct dmxdev_feed {
+        u16 pid;
+        struct dmx_ts_feed *ts;
+        struct list_head next;
+};
+
+/**
+ * struct dmxdev_filter - digital TV dmxdev filter
+ *
+ * @filter:     a union describing a dmxdev filter.
+ *              Currently used only for section filters.
+ * @filter.sec: a &struct dmx_section_filter pointer.
+ *              For section filter only.
+ * @feed:       a union describing a dmxdev feed.
+ *              Depending on the filter type, it can be either
+ *              @feed.ts or @feed.sec.
+ * @feed.ts:    a &struct list_head list.
+ *              For TS and PES feeds.
+ * @feed.sec:   a &struct dmx_section_feed pointer.
+ *              For section feed only.
+ * @params:     a union describing dmxdev filter parameters.
+ *              Depending on the filter type, it can be either
+ *              @params.sec or @params.pes.
+ * @params.sec: a &struct dmx_sct_filter_params embedded struct.
+ *              For section filter only.
+ * @params.pes: a &struct dmx_pes_filter_params embedded struct.
+ *              For PES filter only.
+ * @type:       type of the dmxdev filter, as defined by &enum dmxdev_type.
+ * @state:      state of the dmxdev filter, as defined by &enum dmxdev_state.
+ * @dev:        pointer to &struct dmxdev.
+ * @buffer:     an embedded &struct dvb_ringbuffer buffer.
+ * @vb2_ctx:    control struct for VB2 handler
+ * @mutex:      protects the access to &struct dmxdev_filter.
+ * @timer:      &struct timer_list embedded timer, used to check for
+ *              feed timeouts.
+ *              Only for section filter.
+ * @todo:       index for the @secheader.
+ *              Only for section filter.
+ * @secheader:  buffer cache to parse the section header.
+ *              Only for section filter.
+ */
+struct dmxdev_filter {
+        union {
+                struct dmx_section_filter *sec;
+        } filter;
+
+        union {
+                /* list of TS and PES feeds (struct dmxdev_feed) */
+                struct list_head ts;
+                struct dmx_section_feed *sec;
+        } feed;
+
+        union {
+                struct dmx_sct_filter_params sec;
+                struct dmx_pes_filter_params pes;
+        } params;
+
+        enum dmxdev_type type;
+        enum dmxdev_state state;
+        struct dmxdev *dev;
+        struct dvb_ringbuffer buffer;
+        struct dvb_vb2_ctx vb2_ctx;
+
+        struct mutex mutex;
+
+        /* only for sections */
+        struct timer_list timer;
+        int todo;
+        u8 secheader[3];
+};
+
+/**
+ * struct dmxdev - Describes a digital TV demux device.
+ *
+ * @dvbdev:             pointer to &struct dvb_device associated with
+ *                      the demux device node.
+ * @dvr_dvbdev:         pointer to &struct dvb_device associated with
+ *                      the dvr device node.
+ * @filter:             pointer to &struct dmxdev_filter.
+ * @demux:              pointer to &struct dmx_demux.
+ * @filternum:          number of filters.
+ * @capabilities:       demux capabilities as defined by &enum dmx_demux_caps.
+ * @exit:               flag to indicate that the demux is being released.
+ * @dvr_orig_fe:        pointer to &struct dmx_frontend.
+ * @dvr_buffer:         embedded &struct dvb_ringbuffer for DVB output.
+ * @dvr_vb2_ctx:        control struct for VB2 handler
+ * @mutex:              protects the usage of this structure.
+ * @lock:               protects access to &dmxdev->filter->data.
+ */
+struct dmxdev {
+        struct dvb_device *dvbdev;
+        struct dvb_device *dvr_dvbdev;
+
+        struct dmxdev_filter *filter;
+        struct dmx_demux *demux;
+
+        int filternum;
+        int capabilities;
+
+        unsigned int exit:1;
+#define DMXDEV_CAP_DUPLEX 1
+        struct dmx_frontend *dvr_orig_fe;
+
+        struct dvb_ringbuffer dvr_buffer;
+#define DVR_BUFFER_SIZE (10*188*1024)
+
+        struct dvb_vb2_ctx dvr_vb2_ctx;
+
+        struct mutex mutex;
+        spinlock_t lock;
+};
+
+/**
+ * dvb_dmxdev_init - initializes a digital TV demux and registers both demux
+ *      and DVR devices.
+ *
+ * @dmxdev: pointer to &struct dmxdev.
+ * @adap: pointer to &struct dvb_adapter.
+ */
+int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *adap);
+
+/**
+ * dvb_dmxdev_release - releases a digital TV demux and unregisters it.
+ *
+ * @dmxdev: pointer to &struct dmxdev.
+ */
+void dvb_dmxdev_release(struct dmxdev *dmxdev);
+
+#endif /* _DMXDEV_H_ */