typedef enum {
DMX_OK = 0, /⋆ Received Ok ⋆/
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_success_t;
/⋆--------------------------------------------------------------------------⋆/ /⋆ TS packet reception ⋆/ /⋆--------------------------------------------------------------------------⋆/ /⋆ TS filter type for set_type() ⋆/ #define TS_PACKET 1 /⋆ send TS packets (188 bytes) to callback (default) ⋆/ #define TS_PAYLOAD_ONLY 2 /⋆ in case TS_PACKET is set, only send the TS payload (<=184 bytes per packet) to callback ⋆/ #define TS_DECODER 4 /⋆ send stream to built-in decoder (if present) ⋆/
The structure
typedef enum
{
DMX_TS_PES_AUDIO, /⋆ also send packets to audio decoder (if it exists) ⋆/
DMX_TS_PES_VIDEO, /⋆ ... ⋆/
DMX_TS_PES_TELETEXT,
DMX_TS_PES_SUBTITLE,
DMX_TS_PES_PCR,
DMX_TS_PES_OTHER,
} dmx_ts_pes_t;
describes the PES type for filters which write to a built-in decoder. The correspond (and should be kept identical) to the types in the demux device.
struct dmx_ts_feed_s {
int is_filtering; /⋆ Set to non-zero when filtering in progress ⋆/
struct dmx_demux_s⋆ parent; /⋆ Back-pointer ⋆/
void⋆ priv; /⋆ Pointer to private data of the API client ⋆/
int (⋆set) (struct dmx_ts_feed_s⋆ feed,
__u16 pid,
size_t callback_length,
size_t circular_buffer_size,
int descramble,
struct timespec timeout);
int (⋆start_filtering) (struct dmx_ts_feed_s⋆ feed);
int (⋆stop_filtering) (struct dmx_ts_feed_s⋆ feed);
int (⋆set_type) (struct dmx_ts_feed_s⋆ feed,
int type,
dmx_ts_pes_t pes_type);
};
typedef struct dmx_ts_feed_s dmx_ts_feed_t;
/⋆--------------------------------------------------------------------------⋆/
/⋆ PES packet reception (not supported yet) ⋆/
/⋆--------------------------------------------------------------------------⋆/
typedef struct dmx_pes_filter_s {
struct dmx_pes_s⋆ parent; /⋆ Back-pointer ⋆/
void⋆ priv; /⋆ Pointer to private data of the API client ⋆/
} dmx_pes_filter_t;
typedef struct dmx_pes_feed_s {
int is_filtering; /⋆ Set to non-zero when filtering in progress ⋆/
struct dmx_demux_s⋆ parent; /⋆ Back-pointer ⋆/
void⋆ priv; /⋆ Pointer to private data of the API client ⋆/
int (⋆set) (struct dmx_pes_feed_s⋆ feed,
__u16 pid,
size_t circular_buffer_size,
int descramble,
struct timespec timeout);
int (⋆start_filtering) (struct dmx_pes_feed_s⋆ feed);
int (⋆stop_filtering) (struct dmx_pes_feed_s⋆ feed);
int (⋆allocate_filter) (struct dmx_pes_feed_s⋆ feed,
dmx_pes_filter_t⋆⋆ filter);
int (⋆release_filter) (struct dmx_pes_feed_s⋆ feed,
dmx_pes_filter_t⋆ filter);
} dmx_pes_feed_t;
typedef struct {
__u8 filter_value [DMX_MAX_FILTER_SIZE];
__u8 filter_mask [DMX_MAX_FILTER_SIZE];
struct dmx_section_feed_s⋆ parent; /⋆ Back-pointer ⋆/
void⋆ priv; /⋆ Pointer to private data of the API client ⋆/
} dmx_section_filter_t;
struct dmx_section_feed_s {
int is_filtering; /⋆ Set to non-zero when filtering in progress ⋆/
struct dmx_demux_s⋆ parent; /⋆ Back-pointer ⋆/
void⋆ priv; /⋆ Pointer to private data of the API client ⋆/
int (⋆set) (struct dmx_section_feed_s⋆ feed,
__u16 pid,
size_t circular_buffer_size,
int descramble,
int check_crc);
int (⋆allocate_filter) (struct dmx_section_feed_s⋆ feed,
dmx_section_filter_t⋆⋆ filter);
int (⋆release_filter) (struct dmx_section_feed_s⋆ feed,
dmx_section_filter_t⋆ filter);
int (⋆start_filtering) (struct dmx_section_feed_s⋆ feed);
int (⋆stop_filtering) (struct dmx_section_feed_s⋆ feed);
};
typedef struct dmx_section_feed_s dmx_section_feed_t;
/⋆--------------------------------------------------------------------------⋆/
/⋆ Callback functions ⋆/
/⋆--------------------------------------------------------------------------⋆/
typedef int (⋆dmx_ts_cb) ( __u8 ⋆ buffer1,
size_t buffer1_length,
__u8 ⋆ buffer2,
size_t buffer2_length,
dmx_ts_feed_t⋆ source,
dmx_success_t success);
typedef int (⋆dmx_section_cb) ( __u8 ⋆ buffer1,
size_t buffer1_len,
__u8 ⋆ buffer2,
size_t buffer2_len,
dmx_section_filter_t ⋆ source,
dmx_success_t success);
typedef int (⋆dmx_pes_cb) ( __u8 ⋆ buffer1,
size_t buffer1_len,
__u8 ⋆ buffer2,
size_t buffer2_len,
dmx_pes_filter_t⋆ source,
dmx_success_t success);
/⋆--------------------------------------------------------------------------⋆/
/⋆ DVB Front-End ⋆/
/⋆--------------------------------------------------------------------------⋆/
typedef enum {
DMX_OTHER_FE = 0,
DMX_SATELLITE_FE,
DMX_CABLE_FE,
DMX_TERRESTRIAL_FE,
DMX_LVDS_FE,
DMX_ASI_FE, /⋆ DVB-ASI interface ⋆/
DMX_MEMORY_FE
} dmx_frontend_source_t;
typedef struct {
/⋆ The following char⋆ fields point to NULL terminated strings ⋆/
char⋆ id; /⋆ Unique front-end identifier ⋆/
char⋆ vendor; /⋆ Name of the front-end vendor ⋆/
char⋆ model; /⋆ Name of the front-end model ⋆/
struct list_head connectivity_list; /⋆ List of front-ends that can
be connected to a particular
demux ⋆/
void⋆ priv; /⋆ Pointer to private data of the API client ⋆/
dmx_frontend_source_t source;
} dmx_frontend_t;
/⋆--------------------------------------------------------------------------⋆/
/⋆ MPEG-2 TS Demux ⋆/
/⋆--------------------------------------------------------------------------⋆/
/⋆
⋆ Flags OR'ed in the capabilites field of struct dmx_demux_s.
⋆/
#define DMX_TS_FILTERING 1
#define DMX_PES_FILTERING 2
#define DMX_SECTION_FILTERING 4
#define DMX_MEMORY_BASED_FILTERING 8 /⋆ write() available ⋆/
#define DMX_CRC_CHECKING 16
#define DMX_TS_DESCRAMBLING 32
#define DMX_SECTION_PAYLOAD_DESCRAMBLING 64
#define DMX_MAC_ADDRESS_DESCRAMBLING 128
/⋆
⋆ DMX_FE_ENTRY(): Casts elements in the list of registered
⋆ front-ends from the generic type struct list_head
⋆ to the type ⋆ dmx_frontend_t
⋆.
⋆/
#define DMX_FE_ENTRY(list) list_entry(list, dmx_frontend_t, connectivity_list)
struct dmx_demux_s {
/⋆ The following char⋆ fields point to NULL terminated strings ⋆/
char⋆ id; /⋆ Unique demux identifier ⋆/
char⋆ vendor; /⋆ Name of the demux vendor ⋆/
char⋆ model; /⋆ Name of the demux model ⋆/
__u32 capabilities; /⋆ Bitfield of capability flags ⋆/
dmx_frontend_t⋆ frontend; /⋆ Front-end connected to the demux ⋆/
struct list_head reg_list; /⋆ List of registered demuxes ⋆/
void⋆ priv; /⋆ Pointer to private data of the API client ⋆/
int users; /⋆ Number of users ⋆/
int (⋆open) (struct dmx_demux_s⋆ demux);
int (⋆close) (struct dmx_demux_s⋆ demux);
int (⋆write) (struct dmx_demux_s⋆ demux, const char⋆ buf, size_t count);
int (⋆allocate_ts_feed) (struct dmx_demux_s⋆ demux,
dmx_ts_feed_t⋆⋆ feed,
dmx_ts_cb callback);
int (⋆release_ts_feed) (struct dmx_demux_s⋆ demux,
dmx_ts_feed_t⋆ feed);
int (⋆allocate_pes_feed) (struct dmx_demux_s⋆ demux,
dmx_pes_feed_t⋆⋆ feed,
dmx_pes_cb callback);
int (⋆release_pes_feed) (struct dmx_demux_s⋆ demux,
dmx_pes_feed_t⋆ feed);
int (⋆allocate_section_feed) (struct dmx_demux_s⋆ demux,
dmx_section_feed_t⋆⋆ feed,
dmx_section_cb callback);
int (⋆release_section_feed) (struct dmx_demux_s⋆ demux,
dmx_section_feed_t⋆ feed);
int (⋆descramble_mac_address) (struct dmx_demux_s⋆ demux,
__u8⋆ buffer1,
size_t buffer1_length,
__u8⋆ buffer2,
size_t buffer2_length,
__u16 pid);
int (⋆descramble_section_payload) (struct dmx_demux_s⋆ demux,
__u8⋆ buffer1,
size_t buffer1_length,
__u8⋆ buffer2, size_t buffer2_length,
__u16 pid);
int (⋆add_frontend) (struct dmx_demux_s⋆ demux,
dmx_frontend_t⋆ frontend);
int (⋆remove_frontend) (struct dmx_demux_s⋆ demux,
dmx_frontend_t⋆ frontend);
struct list_head⋆ (⋆get_frontends) (struct dmx_demux_s⋆ demux);
int (⋆connect_frontend) (struct dmx_demux_s⋆ demux,
dmx_frontend_t⋆ frontend);
int (⋆disconnect_frontend) (struct dmx_demux_s⋆ demux);
/⋆ added because js cannot keep track of these himself ⋆/
int (⋆get_pes_pids) (struct dmx_demux_s⋆ demux, __u16 ⋆pids);
};
typedef struct dmx_demux_s dmx_demux_t;
/⋆ ⋆ DMX_DIR_ENTRY(): Casts elements in the list of registered ⋆ demuxes from the generic type struct list_head⋆ to the type dmx_demux_t ⋆. ⋆/ #define DMX_DIR_ENTRY(list) list_entry(list, dmx_demux_t, reg_list) int dmx_register_demux (dmx_demux_t⋆ demux); int dmx_unregister_demux (dmx_demux_t⋆ demux); struct list_head⋆ dmx_get_demuxes (void);