| /* |
| * demux.h |
| * |
| * The Kernel Digital TV Demux kABI defines a driver-internal interface for |
| * registering low-level, hardware specific driver to a hardware independent |
| * demux layer. |
| * |
| * Copyright (c) 2002 Convergence GmbH |
| * |
| * based on code: |
| * Copyright (c) 2000 Nokia Research Center |
| * Tampere, FINLAND |
| * |
| * 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 __DEMUX_H |
| #define __DEMUX_H |
| |
| #include <linux/types.h> |
| #include <linux/errno.h> |
| #include <linux/list.h> |
| #include <linux/time.h> |
| #include <linux/dvb/dmx.h> |
| |
| /* |
| * Common definitions |
| */ |
| |
| #define DMX_EVENT_QUEUE_SIZE 500 /* number of events */ |
| |
| /* |
| * DMX_MAX_FILTER_SIZE: Maximum length (in bytes) of a section/PES filter. |
| */ |
| |
| #ifndef DMX_MAX_FILTER_SIZE |
| #define DMX_MAX_FILTER_SIZE 18 |
| #endif |
| |
| /* |
| * DMX_MAX_SECFEED_SIZE: Maximum length (in bytes) of a private section feed |
| * filter. |
| */ |
| |
| #ifndef DMX_MAX_SECTION_SIZE |
| #define DMX_MAX_SECTION_SIZE 4096 |
| #endif |
| #ifndef DMX_MAX_SECFEED_SIZE |
| #define DMX_MAX_SECFEED_SIZE (DMX_MAX_SECTION_SIZE + 188) |
| #endif |
| |
| #define DMX_FAILURE 1 /* General failure */ |
| /* |
| * enum dmx_success: Success codes for the Demux Callback API. |
| */ |
| enum dmx_success { |
| DMX_OK = 0, /* Received Ok */ |
| DMX_OK_PES_END, /* Received OK, data reached end of PES packet */ |
| DMX_OK_PCR, /* Received OK, data with new PCR/STC pair */ |
| DMX_OK_EOS, /* Received OK, reached End-of-Stream (EOS) */ |
| DMX_OK_MARKER, /* Received OK, reached a data Marker */ |
| DMX_LENGTH_ERROR, /* Incorrect length */ |
| DMX_OVERRUN_ERROR, /* Receiver ring buffer overrun */ |
| DMX_CRC_ERROR, /* Incorrect CRC */ |
| DMX_FRAME_ERROR, /* Frame alignment error */ |
| DMX_FIFO_ERROR, /* Receiver FIFO overrun */ |
| DMX_MISSED_ERROR, /* Receiver missed packet */ |
| DMX_OK_DECODER_BUF, /* Received OK, new ES data in decoder buffer */ |
| DMX_OK_IDX, /* Received OK, new index event */ |
| DMX_OK_SCRAMBLING_STATUS, /* Received OK, new scrambling status */ |
| }; |
| |
| struct ion_dma_buff_info { |
| struct dma_buf *dmabuf; |
| struct sg_table *sgt; |
| struct dma_buf_attachment *attach; |
| phys_addr_t pa; |
| void *va; |
| size_t len; |
| }; |
| |
| /* |
| * struct dmx_data_ready: Parameters for event notification callback. |
| * Event notification notifies demux device that data is written |
| * and available in the device's output buffer or provides |
| * notification on errors and other events. In the latter case |
| * data_length is zero. |
| */ |
| struct dmx_data_ready { |
| enum dmx_success status; |
| |
| /* |
| * data_length may be 0 in case of DMX_OK_PES_END or DMX_OK_EOS |
| * and in non-DMX_OK_XXX events. In DMX_OK_PES_END, |
| * data_length is for data coming after the end of PES. |
| */ |
| int data_length; |
| |
| union { |
| struct { |
| int start_gap; |
| int actual_length; |
| int disc_indicator_set; |
| int pes_length_mismatch; |
| u64 stc; |
| u32 tei_counter; |
| u32 cont_err_counter; |
| u32 ts_packets_num; |
| } pes_end; |
| |
| struct { |
| u64 pcr; |
| u64 stc; |
| int disc_indicator_set; |
| } pcr; |
| |
| struct { |
| int handle; |
| int cookie; |
| u32 offset; |
| u32 len; |
| int pts_exists; |
| u64 pts; |
| int dts_exists; |
| u64 dts; |
| u32 tei_counter; |
| u32 cont_err_counter; |
| u32 ts_packets_num; |
| u32 ts_dropped_bytes; |
| u64 stc; |
| } buf; |
| |
| struct { |
| u64 id; |
| } marker; |
| |
| struct dmx_index_event_info idx_event; |
| struct dmx_scrambling_status_event_info scrambling_bits; |
| }; |
| }; |
| |
| /* |
| * struct data_buffer: Parameters of buffer allocated by |
| * demux device for input/output. Can be used to directly map the |
| * demux-device buffer to HW output if HW supports it. |
| */ |
| struct data_buffer { |
| /* dvb_ringbuffer managed by demux-device */ |
| const struct dvb_ringbuffer *ringbuff; |
| |
| /* ion_dma_buff_info managed by demux-device */ |
| struct ion_dma_buff_info buff_dma_info; |
| |
| }; |
| /* |
| * TS packet reception |
| */ |
| |
| /** |
| * enum ts_filter_type - filter type bitmap for dmx_ts_feed.set\(\) |
| * |
| * @TS_PACKET: Send TS packets (188 bytes) to callback (default). |
| * @TS_PAYLOAD_ONLY: In case TS_PACKET is set, only send the TS payload |
| * (<=184 bytes per packet) to callback |
| * @TS_DECODER: Send stream to built-in decoder (if present). |
| * @TS_DEMUX: In case TS_PACKET is set, send the TS to the demux |
| * device, not to the dvr device |
| */ |
| enum ts_filter_type { |
| TS_PACKET = 1, |
| TS_PAYLOAD_ONLY = 2, |
| TS_DECODER = 4, |
| TS_DEMUX = 8, |
| }; |
| |
| /** |
| * struct dmx_ts_feed - Structure that contains a TS feed filter |
| * |
| * @is_filtering: Set to non-zero when filtering in progress |
| * @parent: pointer to struct dmx_demux |
| * @priv: pointer to private data of the API client |
| * @set: sets the TS filter |
| * @start_filtering: starts TS filtering |
| * @stop_filtering: stops TS filtering |
| * |
| * A TS feed is typically mapped to a hardware PID filter on the demux chip. |
| * Using this API, the client can set the filtering properties to start/stop |
| * filtering TS packets on a particular TS feed. |
| */ |
| struct dmx_ts_feed; |
| |
| typedef int (*dmx_ts_data_ready_cb)( |
| struct dmx_ts_feed *source, |
| struct dmx_data_ready *dmx_data_ready); |
| |
| struct dmx_ts_feed { |
| int is_filtering; |
| struct dmx_demux *parent; |
| struct data_buffer buffer; |
| void *priv; |
| struct dmx_decoder_buffers *decoder_buffers; |
| int (*set)(struct dmx_ts_feed *feed, |
| u16 pid, |
| int type, |
| enum dmx_ts_pes pes_type, |
| size_t circular_buffer_size, |
| ktime_t timeout); |
| int (*start_filtering)(struct dmx_ts_feed *feed); |
| int (*stop_filtering)(struct dmx_ts_feed *feed); |
| int (*set_video_codec)(struct dmx_ts_feed *feed, |
| enum dmx_video_codec video_codec); |
| int (*set_idx_params)(struct dmx_ts_feed *feed, |
| struct dmx_indexing_params *idx_params); |
| int (*get_decoder_buff_status)( |
| struct dmx_ts_feed *feed, |
| struct dmx_buffer_status *dmx_buffer_status); |
| int (*reuse_decoder_buffer)( |
| struct dmx_ts_feed *feed, |
| int cookie); |
| int (*data_ready_cb)(struct dmx_ts_feed *feed, |
| dmx_ts_data_ready_cb callback); |
| int (*notify_data_read)(struct dmx_ts_feed *feed, |
| u32 bytes_num); |
| int (*set_tsp_out_format)(struct dmx_ts_feed *feed, |
| enum dmx_tsp_format_t tsp_format); |
| int (*set_secure_mode)(struct dmx_ts_feed *feed, |
| struct dmx_secure_mode *sec_mode); |
| int (*set_cipher_ops)(struct dmx_ts_feed *feed, |
| struct dmx_cipher_operations *cipher_ops); |
| int (*oob_command)(struct dmx_ts_feed *feed, |
| struct dmx_oob_command *cmd); |
| int (*ts_insertion_init)(struct dmx_ts_feed *feed); |
| int (*ts_insertion_terminate)(struct dmx_ts_feed *feed); |
| int (*ts_insertion_insert_buffer)(struct dmx_ts_feed *feed, |
| char *data, size_t size); |
| int (*get_scrambling_bits)(struct dmx_ts_feed *feed, u8 *value); |
| int (*flush_buffer)(struct dmx_ts_feed *feed, size_t length); |
| }; |
| |
| /* |
| * Section reception |
| */ |
| |
| /** |
| * struct dmx_section_filter - Structure that describes a section filter |
| * |
| * @filter_value: Contains up to 16 bytes (128 bits) of the TS section header |
| * that will be matched by the section filter |
| * @filter_mask: Contains a 16 bytes (128 bits) filter mask with the bits |
| * specified by @filter_value that will be used on the filter |
| * match logic. |
| * @filter_mode: Contains a 16 bytes (128 bits) filter mode. |
| * @parent: Back-pointer to struct dmx_section_feed. |
| * @priv: Pointer to private data of the API client. |
| * |
| * |
| * The @filter_mask controls which bits of @filter_value are compared with |
| * the section headers/payload. On a binary value of 1 in filter_mask, the |
| * corresponding bits are compared. The filter only accepts sections that are |
| * equal to filter_value in all the tested bit positions. |
| */ |
| |
| struct dmx_section_feed; |
| struct dmx_section_filter { |
| u8 filter_value[DMX_MAX_FILTER_SIZE]; |
| u8 filter_mask[DMX_MAX_FILTER_SIZE]; |
| u8 filter_mode[DMX_MAX_FILTER_SIZE]; |
| struct dmx_section_feed *parent; /* Back-pointer */ |
| struct data_buffer buffer; |
| void *priv; /* Pointer to private data of the API client */ |
| }; |
| |
| typedef int (*dmx_section_data_ready_cb)( |
| struct dmx_section_filter *source, |
| struct dmx_data_ready *dmx_data_ready); |
| |
| /** |
| * struct dmx_section_feed - Structure that contains a section feed filter |
| * |
| * @is_filtering: Set to non-zero when filtering in progress |
| * @parent: pointer to struct dmx_demux |
| * @priv: pointer to private data of the API client |
| * @check_crc: If non-zero, check the CRC values of filtered sections. |
| * @set: sets the section filter |
| * @allocate_filter: This function is used to allocate a section filter on |
| * the demux. It should only be called when no filtering |
| * is in progress on this section feed. If a filter cannot |
| * be allocated, the function fails with -ENOSPC. |
| * @release_filter: This function releases all the resources of a |
| * previously allocated section filter. The function |
| * should not be called while filtering is in progress |
| * on this section feed. After calling this function, |
| * the caller should not try to dereference the filter |
| * pointer. |
| * @start_filtering: starts section filtering |
| * @stop_filtering: stops section filtering |
| * |
| * A TS feed is typically mapped to a hardware PID filter on the demux chip. |
| * Using this API, the client can set the filtering properties to start/stop |
| * filtering TS packets on a particular TS feed. |
| */ |
| struct dmx_section_feed { |
| int is_filtering; |
| struct dmx_demux *parent; |
| void *priv; |
| |
| int check_crc; |
| |
| /* private: Used internally at dvb_demux.c */ |
| u32 crc_val; |
| |
| u8 *secbuf; |
| u8 secbuf_base[DMX_MAX_SECFEED_SIZE]; |
| u16 secbufp, seclen, tsfeedp; |
| |
| /* public: */ |
| int (*set)(struct dmx_section_feed *feed, |
| u16 pid, |
| size_t circular_buffer_size, |
| int check_crc); |
| int (*allocate_filter)(struct dmx_section_feed *feed, |
| struct dmx_section_filter **filter); |
| int (*release_filter)(struct dmx_section_feed *feed, |
| struct dmx_section_filter *filter); |
| int (*start_filtering)(struct dmx_section_feed *feed); |
| int (*stop_filtering)(struct dmx_section_feed *feed); |
| int (*data_ready_cb)(struct dmx_section_feed *feed, |
| dmx_section_data_ready_cb callback); |
| int (*notify_data_read)(struct dmx_section_filter *filter, |
| u32 bytes_num); |
| int (*set_secure_mode)(struct dmx_section_feed *feed, |
| struct dmx_secure_mode *sec_mode); |
| int (*set_cipher_ops)(struct dmx_section_feed *feed, |
| struct dmx_cipher_operations *cipher_ops); |
| int (*oob_command)(struct dmx_section_feed *feed, |
| struct dmx_oob_command *cmd); |
| int (*get_scrambling_bits)(struct dmx_section_feed *feed, u8 *value); |
| int (*flush_buffer)(struct dmx_section_feed *feed, size_t length); |
| }; |
| |
| /** |
| * typedef dmx_ts_cb - DVB demux TS filter callback function prototype |
| * |
| * @buffer1: Pointer to the start of the filtered TS packets. |
| * @buffer1_length: Length of the TS data in buffer1. |
| * @buffer2: Pointer to the tail of the filtered TS packets, or NULL. |
| * @buffer2_length: Length of the TS data in buffer2. |
| * @source: Indicates which TS feed is the source of the callback. |
| * @buffer_flags: Address where buffer flags are stored. Those are |
| * used to report discontinuity users via DVB |
| * memory mapped API, as defined by |
| * &enum dmx_buffer_flags. |
| * |
| * This function callback prototype, provided by the client of the demux API, |
| * is called from the demux code. The function is only called when filtering |
| * on a TS feed has been enabled using the start_filtering\(\) function at |
| * the &dmx_demux. |
| * Any TS packets that match the filter settings are copied to a circular |
| * buffer. The filtered TS packets are delivered to the client using this |
| * callback function. |
| * It is expected that the @buffer1 and @buffer2 callback parameters point to |
| * addresses within the circular buffer, but other implementations are also |
| * possible. Note that the called party should not try to free the memory |
| * the @buffer1 and @buffer2 parameters point to. |
| * |
| * When this function is called, the @buffer1 parameter typically points to |
| * the start of the first undelivered TS packet within a circular buffer. |
| * The @buffer2 buffer parameter is normally NULL, except when the received |
| * TS packets have crossed the last address of the circular buffer and |
| * "wrapped" to the beginning of the buffer. In the latter case the @buffer1 |
| * parameter would contain an address within the circular buffer, while the |
| * @buffer2 parameter would contain the first address of the circular buffer. |
| * The number of bytes delivered with this function (i.e. @buffer1_length + |
| * @buffer2_length) is usually equal to the value of callback_length parameter |
| * given in the set() function, with one exception: if a timeout occurs before |
| * receiving callback_length bytes of TS data, any undelivered packets are |
| * immediately delivered to the client by calling this function. The timeout |
| * duration is controlled by the set() function in the TS Feed API. |
| * |
| * If a TS packet is received with errors that could not be fixed by the |
| * TS-level forward error correction (FEC), the Transport_error_indicator |
| * flag of the TS packet header should be set. The TS packet should not be |
| * discarded, as the error can possibly be corrected by a higher layer |
| * protocol. If the called party is slow in processing the callback, it |
| * is possible that the circular buffer eventually fills up. If this happens, |
| * the demux driver should discard any TS packets received while the buffer |
| * is full and return -EOVERFLOW. |
| * |
| * The type of data returned to the callback can be selected by the |
| * &dmx_ts_feed.@set function. The type parameter decides if the raw |
| * TS packet (TS_PACKET) or just the payload (TS_PACKET|TS_PAYLOAD_ONLY) |
| * should be returned. If additionally the TS_DECODER bit is set the stream |
| * will also be sent to the hardware MPEG decoder. |
| * |
| * Return: |
| * |
| * - 0, on success; |
| * |
| * - -EOVERFLOW, on buffer overflow. |
| */ |
| typedef int (*dmx_ts_cb)(const u8 *buffer1, |
| size_t buffer1_length, |
| const u8 *buffer2, |
| size_t buffer2_length, |
| struct dmx_ts_feed *source, |
| u32 *buffer_flags); |
| |
| /** |
| * typedef dmx_section_cb - DVB demux TS filter callback function prototype |
| * |
| * @buffer1: Pointer to the start of the filtered section, e.g. |
| * within the circular buffer of the demux driver. |
| * @buffer1_len: Length of the filtered section data in @buffer1, |
| * including headers and CRC. |
| * @buffer2: Pointer to the tail of the filtered section data, |
| * or NULL. Useful to handle the wrapping of a |
| * circular buffer. |
| * @buffer2_len: Length of the filtered section data in @buffer2, |
| * including headers and CRC. |
| * @source: Indicates which section feed is the source of the |
| * callback. |
| * @buffer_flags: Address where buffer flags are stored. Those are |
| * used to report discontinuity users via DVB |
| * memory mapped API, as defined by |
| * &enum dmx_buffer_flags. |
| * |
| * This function callback prototype, provided by the client of the demux API, |
| * is called from the demux code. The function is only called when |
| * filtering of sections has been enabled using the function |
| * &dmx_ts_feed.@start_filtering. When the demux driver has received a |
| * complete section that matches at least one section filter, the client |
| * is notified via this callback function. Normally this function is called |
| * for each received section; however, it is also possible to deliver |
| * multiple sections with one callback, for example when the system load |
| * is high. If an error occurs while receiving a section, this |
| * function should be called with the corresponding error type set in the |
| * success field, whether or not there is data to deliver. The Section Feed |
| * implementation should maintain a circular buffer for received sections. |
| * However, this is not necessary if the Section Feed API is implemented as |
| * a client of the TS Feed API, because the TS Feed implementation then |
| * buffers the received data. The size of the circular buffer can be |
| * configured using the &dmx_ts_feed.@set function in the Section Feed API. |
| * If there is no room in the circular buffer when a new section is received, |
| * the section must be discarded. If this happens, the value of the success |
| * parameter should be DMX_OVERRUN_ERROR on the next callback. |
| */ |
| typedef int (*dmx_section_cb)(const u8 *buffer1, |
| size_t buffer1_len, |
| const u8 *buffer2, |
| size_t buffer2_len, |
| struct dmx_section_filter *source, |
| u32 *buffer_flags); |
| |
| typedef int (*dmx_ts_fullness) ( |
| struct dmx_ts_feed *source, |
| int required_space, |
| int wait); |
| |
| typedef int (*dmx_section_fullness) ( |
| struct dmx_section_filter *source, |
| int required_space, |
| int wait); |
| |
| /* |
| * DVB Front-End |
| */ |
| |
| /** |
| * enum dmx_frontend_source - Used to identify the type of frontend |
| * |
| * @DMX_MEMORY_FE: The source of the demux is memory. It means that |
| * the MPEG-TS to be filtered comes from userspace, |
| * via write() syscall. |
| * |
| * @DMX_FRONTEND_0: The source of the demux is a frontend connected |
| * to the demux. |
| */ |
| enum dmx_frontend_source { |
| DMX_MEMORY_FE, |
| DMX_FRONTEND_0, |
| DMX_FRONTEND_1, |
| DMX_FRONTEND_2, |
| DMX_FRONTEND_3, |
| DMX_STREAM_0, /* external stream input, e.g. LVDS */ |
| DMX_STREAM_1, |
| DMX_STREAM_2, |
| DMX_STREAM_3 |
| }; |
| |
| /** |
| * struct dmx_frontend - Structure that lists the frontends associated with |
| * a demux |
| * |
| * @connectivity_list: List of front-ends that can be connected to a |
| * particular demux; |
| * @source: Type of the frontend. |
| * |
| * FIXME: this structure should likely be replaced soon by some |
| * media-controller based logic. |
| */ |
| struct dmx_frontend { |
| struct list_head connectivity_list; |
| enum dmx_frontend_source source; |
| }; |
| |
| /* |
| * MPEG-2 TS Demux |
| */ |
| |
| /** |
| * enum dmx_demux_caps - MPEG-2 TS Demux capabilities bitmap |
| * |
| * @DMX_TS_FILTERING: set if TS filtering is supported; |
| * @DMX_SECTION_FILTERING: set if section filtering is supported; |
| * @DMX_MEMORY_BASED_FILTERING: set if write() available. |
| * |
| * Those flags are OR'ed in the &dmx_demux.capabilities field |
| */ |
| enum dmx_demux_caps { |
| DMX_TS_FILTERING = 1, |
| DMX_PES_FILTERING = 2, |
| DMX_SECTION_FILTERING = 4, |
| DMX_MEMORY_BASED_FILTERING = 8, |
| DMX_CRC_CHECKING = 16, |
| DMX_TS_DESCRAMBLING = 32 |
| }; |
| |
| /* |
| * Demux resource type identifier. |
| */ |
| |
| /** |
| * DMX_FE_ENTRY - Casts elements in the list of registered |
| * front-ends from the generic type struct list_head |
| * to the type * struct dmx_frontend |
| * |
| * @list: list of struct dmx_frontend |
| */ |
| #define DMX_FE_ENTRY(list) \ |
| list_entry(list, struct dmx_frontend, connectivity_list) |
| |
| /** |
| * struct dmx_demux - Structure that contains the demux capabilities and |
| * callbacks. |
| * |
| * @capabilities: Bitfield of capability flags. |
| * |
| * @frontend: Front-end connected to the demux |
| * |
| * @priv: Pointer to private data of the API client |
| * |
| * @open: This function reserves the demux for use by the caller and, if |
| * necessary, initializes the demux. When the demux is no longer needed, |
| * the function @close should be called. It should be possible for |
| * multiple clients to access the demux at the same time. Thus, the |
| * function implementation should increment the demux usage count when |
| * @open is called and decrement it when @close is called. |
| * The @demux function parameter contains a pointer to the demux API and |
| * instance data. |
| * It returns: |
| * 0 on success; |
| * -EUSERS, if maximum usage count was reached; |
| * -EINVAL, on bad parameter. |
| * |
| * @close: This function reserves the demux for use by the caller and, if |
| * necessary, initializes the demux. When the demux is no longer needed, |
| * the function @close should be called. It should be possible for |
| * multiple clients to access the demux at the same time. Thus, the |
| * function implementation should increment the demux usage count when |
| * @open is called and decrement it when @close is called. |
| * The @demux function parameter contains a pointer to the demux API and |
| * instance data. |
| * It returns: |
| * 0 on success; |
| * -ENODEV, if demux was not in use (e. g. no users); |
| * -EINVAL, on bad parameter. |
| * |
| * @write: This function provides the demux driver with a memory buffer |
| * containing TS packets. Instead of receiving TS packets from the DVB |
| * front-end, the demux driver software will read packets from memory. |
| * Any clients of this demux with active TS, PES or Section filters will |
| * receive filtered data via the Demux callback API (see 0). The function |
| * returns when all the data in the buffer has been consumed by the demux. |
| * Demux hardware typically cannot read TS from memory. If this is the |
| * case, memory-based filtering has to be implemented entirely in software. |
| * The @demux function parameter contains a pointer to the demux API and |
| * instance data. |
| * The @buf function parameter contains a pointer to the TS data in |
| * kernel-space memory. |
| * The @count function parameter contains the length of the TS data. |
| * It returns: |
| * 0 on success; |
| * -ERESTARTSYS, if mutex lock was interrupted; |
| * -EINTR, if a signal handling is pending; |
| * -ENODEV, if demux was removed; |
| * -EINVAL, on bad parameter. |
| * |
| * @allocate_ts_feed: Allocates a new TS feed, which is used to filter the TS |
| * packets carrying a certain PID. The TS feed normally corresponds to a |
| * hardware PID filter on the demux chip. |
| * The @demux function parameter contains a pointer to the demux API and |
| * instance data. |
| * The @feed function parameter contains a pointer to the TS feed API and |
| * instance data. |
| * The @callback function parameter contains a pointer to the callback |
| * function for passing received TS packet. |
| * It returns: |
| * 0 on success; |
| * -ERESTARTSYS, if mutex lock was interrupted; |
| * -EBUSY, if no more TS feeds is available; |
| * -EINVAL, on bad parameter. |
| * |
| * @release_ts_feed: Releases the resources allocated with @allocate_ts_feed. |
| * Any filtering in progress on the TS feed should be stopped before |
| * calling this function. |
| * The @demux function parameter contains a pointer to the demux API and |
| * instance data. |
| * The @feed function parameter contains a pointer to the TS feed API and |
| * instance data. |
| * It returns: |
| * 0 on success; |
| * -EINVAL on bad parameter. |
| * |
| * @allocate_section_feed: Allocates a new section feed, i.e. a demux resource |
| * for filtering and receiving sections. On platforms with hardware |
| * support for section filtering, a section feed is directly mapped to |
| * the demux HW. On other platforms, TS packets are first PID filtered in |
| * hardware and a hardware section filter then emulated in software. The |
| * caller obtains an API pointer of type dmx_section_feed_t as an out |
| * parameter. Using this API the caller can set filtering parameters and |
| * start receiving sections. |
| * The @demux function parameter contains a pointer to the demux API and |
| * instance data. |
| * The @feed function parameter contains a pointer to the TS feed API and |
| * instance data. |
| * The @callback function parameter contains a pointer to the callback |
| * function for passing received TS packet. |
| * It returns: |
| * 0 on success; |
| * -EBUSY, if no more TS feeds is available; |
| * -EINVAL, on bad parameter. |
| * |
| * @release_section_feed: Releases the resources allocated with |
| * @allocate_section_feed, including allocated filters. Any filtering in |
| * progress on the section feed should be stopped before calling this |
| * function. |
| * The @demux function parameter contains a pointer to the demux API and |
| * instance data. |
| * The @feed function parameter contains a pointer to the TS feed API and |
| * instance data. |
| * It returns: |
| * 0 on success; |
| * -EINVAL, on bad parameter. |
| * |
| * @add_frontend: Registers a connectivity between a demux and a front-end, |
| * i.e., indicates that the demux can be connected via a call to |
| * @connect_frontend to use the given front-end as a TS source. The |
| * client of this function has to allocate dynamic or static memory for |
| * the frontend structure and initialize its fields before calling this |
| * function. This function is normally called during the driver |
| * initialization. The caller must not free the memory of the frontend |
| * struct before successfully calling @remove_frontend. |
| * The @demux function parameter contains a pointer to the demux API and |
| * instance data. |
| * The @frontend function parameter contains a pointer to the front-end |
| * instance data. |
| * It returns: |
| * 0 on success; |
| * -EINVAL, on bad parameter. |
| * |
| * @remove_frontend: Indicates that the given front-end, registered by a call |
| * to @add_frontend, can no longer be connected as a TS source by this |
| * demux. The function should be called when a front-end driver or a demux |
| * driver is removed from the system. If the front-end is in use, the |
| * function fails with the return value of -EBUSY. After successfully |
| * calling this function, the caller can free the memory of the frontend |
| * struct if it was dynamically allocated before the @add_frontend |
| * operation. |
| * The @demux function parameter contains a pointer to the demux API and |
| * instance data. |
| * The @frontend function parameter contains a pointer to the front-end |
| * instance data. |
| * It returns: |
| * 0 on success; |
| * -ENODEV, if the front-end was not found, |
| * -EINVAL, on bad parameter. |
| * |
| * @get_frontends: Provides the APIs of the front-ends that have been |
| * registered for this demux. Any of the front-ends obtained with this |
| * call can be used as a parameter for @connect_frontend. The include |
| * file demux.h contains the macro DMX_FE_ENTRY() for converting an |
| * element of the generic type struct &list_head * to the type |
| * struct &dmx_frontend *. The caller must not free the memory of any of |
| * the elements obtained via this function call. |
| * The @demux function parameter contains a pointer to the demux API and |
| * instance data. |
| * It returns a struct list_head pointer to the list of front-end |
| * interfaces, or NULL in the case of an empty list. |
| * |
| * @connect_frontend: Connects the TS output of the front-end to the input of |
| * the demux. A demux can only be connected to a front-end registered to |
| * the demux with the function @add_frontend. It may or may not be |
| * possible to connect multiple demuxes to the same front-end, depending |
| * on the capabilities of the HW platform. When not used, the front-end |
| * should be released by calling @disconnect_frontend. |
| * The @demux function parameter contains a pointer to the demux API and |
| * instance data. |
| * The @frontend function parameter contains a pointer to the front-end |
| * instance data. |
| * It returns: |
| * 0 on success; |
| * -EINVAL, on bad parameter. |
| * |
| * @disconnect_frontend: Disconnects the demux and a front-end previously |
| * connected by a @connect_frontend call. |
| * The @demux function parameter contains a pointer to the demux API and |
| * instance data. |
| * It returns: |
| * 0 on success; |
| * -EINVAL on bad parameter. |
| * |
| * @get_pes_pids: Get the PIDs for DMX_PES_AUDIO0, DMX_PES_VIDEO0, |
| * DMX_PES_TELETEXT0, DMX_PES_SUBTITLE0 and DMX_PES_PCR0. |
| * The @demux function parameter contains a pointer to the demux API and |
| * instance data. |
| * The @pids function parameter contains an array with five u16 elements |
| * where the PIDs will be stored. |
| * It returns: |
| * 0 on success; |
| * -EINVAL on bad parameter. |
| */ |
| struct dmx_demux { |
| enum dmx_demux_caps capabilities; |
| struct dmx_frontend *frontend; |
| void *priv; |
| struct data_buffer dvr_input; /* DVR input buffer */ |
| int dvr_input_protected; |
| struct dentry *debugfs_demux_dir; /* debugfs dir */ |
| |
| int (*open)(struct dmx_demux *demux); |
| int (*close)(struct dmx_demux *demux); |
| int (*write)(struct dmx_demux *demux, const char __user *buf, |
| size_t count); |
| int (*allocate_ts_feed)(struct dmx_demux *demux, |
| struct dmx_ts_feed **feed, |
| dmx_ts_cb callback); |
| int (*release_ts_feed)(struct dmx_demux *demux, |
| struct dmx_ts_feed *feed); |
| int (*allocate_section_feed)(struct dmx_demux *demux, |
| struct dmx_section_feed **feed, |
| dmx_section_cb callback); |
| int (*release_section_feed)(struct dmx_demux *demux, |
| struct dmx_section_feed *feed); |
| int (*add_frontend)(struct dmx_demux *demux, |
| struct dmx_frontend *frontend); |
| int (*remove_frontend)(struct dmx_demux *demux, |
| struct dmx_frontend *frontend); |
| struct list_head *(*get_frontends)(struct dmx_demux *demux); |
| int (*connect_frontend)(struct dmx_demux *demux, |
| struct dmx_frontend *frontend); |
| int (*disconnect_frontend)(struct dmx_demux *demux); |
| |
| int (*get_pes_pids)(struct dmx_demux *demux, u16 *pids); |
| |
| int (*get_caps)(struct dmx_demux *demux, struct dmx_caps *caps); |
| |
| int (*set_source)(struct dmx_demux *demux, |
| const enum dmx_source_t *src); |
| |
| int (*set_tsp_format)(struct dmx_demux *demux, |
| enum dmx_tsp_format_t tsp_format); |
| |
| int (*set_playback_mode)(struct dmx_demux *demux, |
| enum dmx_playback_mode_t mode, |
| dmx_ts_fullness ts_fullness_callback, |
| dmx_section_fullness sec_fullness_callback); |
| |
| int (*write_cancel)(struct dmx_demux *demux); |
| |
| /* private: */ |
| |
| /* |
| * Only used at av7110, to read some data from firmware. |
| * As this was never documented, we have no clue about what's |
| * there, and its usage on other drivers aren't encouraged. |
| */ |
| int (*get_stc)(struct dmx_demux *demux, unsigned int num, |
| u64 *stc, unsigned int *base); |
| |
| int (*map_buffer)(struct dmx_demux *demux, |
| struct dmx_buffer *dmx_buffer, |
| struct ion_dma_buff_info *dma_buffer, void **mem); |
| |
| int (*unmap_buffer)(struct dmx_demux *demux, |
| struct ion_dma_buff_info *dma_buffer); |
| |
| int (*get_tsp_size)(struct dmx_demux *demux); |
| }; |
| |
| #endif /* #ifndef __DEMUX_H */ |