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hdhomerun_video.h
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/*
* hdhomerun_video.h
*
* Copyright © 2006 Silicondust USA Inc. <www.silicondust.com>.
*
* This library 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 3 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception to the GNU Lesser General Public License,
* you may link, statically or dynamically, an application with a
* publicly distributed version of the Library to produce an
* executable file containing portions of the Library, and
* distribute that executable file under terms of your choice,
* without any of the additional requirements listed in clause 4 of
* the GNU Lesser General Public License.
*
* By "a publicly distributed version of the Library", we mean
* either the unmodified Library as distributed by Silicondust, or a
* modified version of the Library that is distributed under the
* conditions defined in the GNU Lesser General Public License.
*/
#ifdef __cplusplus
extern "C" {
#endif
struct hdhomerun_video_sock_t;
struct hdhomerun_video_stats_t {
uint32_t packet_count;
uint32_t network_error_count;
uint32_t transport_error_count;
uint32_t sequence_error_count;
uint32_t overflow_error_count;
};
#define TS_PACKET_SIZE 188
#define VIDEO_DATA_PACKET_SIZE (188 * 7)
#define VIDEO_DATA_BUFFER_SIZE_1S (20000000 / 8)
#define VIDEO_RTP_DATA_PACKET_SIZE ((188 * 7) + 12)
/*
* Create a video/data socket.
*
* uint16_t listen_port: Port number to listen on. Set to 0 to auto-select.
* size_t buffer_size: Size of receive buffer. For 1 second of buffer use VIDEO_DATA_BUFFER_SIZE_1S.
* struct hdhomerun_debug_t *dbg: Pointer to debug logging object. May be NULL.
*
* Returns a pointer to the newly created control socket.
*
* When no longer needed, the socket should be destroyed by calling hdhomerun_control_destroy.
*/
extern LIBTYPE struct hdhomerun_video_sock_t *hdhomerun_video_create(uint16_t listen_port, bool_t allow_port_reuse, size_t buffer_size, struct hdhomerun_debug_t *dbg);
extern LIBTYPE void hdhomerun_video_destroy(struct hdhomerun_video_sock_t *vs);
/*
* Get the port the socket is listening on.
*
* Returns 16-bit port with native endianness, or 0 on error.
*/
extern LIBTYPE uint16_t hdhomerun_video_get_local_port(struct hdhomerun_video_sock_t *vs);
/*
* Join/leave multicast group.
*/
extern LIBTYPE int hdhomerun_video_join_multicast_group(struct hdhomerun_video_sock_t *vs, uint32_t multicast_ip, uint32_t local_ip);
extern LIBTYPE void hdhomerun_video_leave_multicast_group(struct hdhomerun_video_sock_t *vs, uint32_t multicast_ip, uint32_t local_ip);
/*
* Read data from buffer.
*
* size_t max_size: The maximum amount of data to be returned.
* size_t *pactual_size: The caller-supplied pactual_size value will be updated to contain the amount
* of data available to the caller.
*
* Returns a pointer to the data, or NULL if no data is available.
* The data will remain valid until another call to hdhomerun_video_recv.
*
* The amount of data returned will always be a multiple of VIDEO_DATA_PACKET_SIZE (1316).
* Attempting to read a single TS frame (188 bytes) will not return data as it is less than
* the minimum size.
*
* The buffer is implemented as a ring buffer. It is possible for this function to return a small
* amount of data when more is available due to the wrap-around case.
*/
extern LIBTYPE uint8_t *hdhomerun_video_recv(struct hdhomerun_video_sock_t *vs, size_t max_size, size_t *pactual_size);
/*
* Flush the buffer.
*/
extern LIBTYPE void hdhomerun_video_flush(struct hdhomerun_video_sock_t *vs);
/*
* Debug print internal stats.
*/
extern LIBTYPE void hdhomerun_video_debug_print_stats(struct hdhomerun_video_sock_t *vs);
extern LIBTYPE void hdhomerun_video_get_stats(struct hdhomerun_video_sock_t *vs, struct hdhomerun_video_stats_t *stats);
/*
* Internal use only.
*/
extern LIBTYPE hdhomerun_sock_t hdhomerun_video_get_sock(struct hdhomerun_video_sock_t *vs);
#ifdef __cplusplus
}
#endif