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https://github.com/libretro/RetroArch
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112 lines
5.0 KiB
C
112 lines
5.0 KiB
C
/*
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Copyright (c) 2012, Broadcom Europe Ltd
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the copyright holder nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _RTP_PRIV_H_
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#define _RTP_PRIV_H_
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#include "containers/containers.h"
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#include "containers/core/containers_private.h"
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#include "containers/core/containers_bits.h"
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#include "containers/core/containers_list.h"
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typedef VC_CONTAINER_STATUS_T (*PAYLOAD_HANDLER_T)(VC_CONTAINER_T *p_ctx,
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VC_CONTAINER_TRACK_T *track, VC_CONTAINER_PACKET_T *p_packet, uint32_t flags);
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/** Parameter list entry type. */
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typedef struct parameter_tag
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{
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const char *name;
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const char *value;
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} PARAMETER_T;
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/** Prototype for MIME parameter handling.
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* Each MIME type has a certain set of parameter names it uses, so a handler is
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* needed for each type. This is that handler's prototype.
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*/
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typedef VC_CONTAINER_STATUS_T (*PARAMETER_HANDLER_T)(VC_CONTAINER_T *p_ctx, VC_CONTAINER_TRACK_T *track, const VC_CONTAINERS_LIST_T *params);
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/** Track module flag bit numbers (up to seven) */
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typedef enum
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{
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TRACK_SSRC_SET = 0,
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TRACK_HAS_MARKER,
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TRACK_NEW_PACKET,
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} track_module_flag_bit_t;
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/** RTP track data */
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typedef struct VC_CONTAINER_TRACK_MODULE_T
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{
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PAYLOAD_HANDLER_T payload_handler; /**< Extracts the data from the payload */
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uint8_t *buffer; /**< Buffer into which the RTP packet is read */
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VC_CONTAINER_BITS_T payload; /**< Payload bit bit_stream */
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uint8_t flags; /**< Combination of track module flags */
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uint8_t payload_type; /**< The expected payload type */
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uint16_t max_seq_num; /**< Highest seq. number seen */
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uint32_t timestamp; /**< RTP timestamp of packet */
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uint32_t timestamp_base; /**< RTP timestamp value that equates to time zero */
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uint32_t last_timestamp_top; /**< Top two bits of RTP timestamp of previous packet */
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uint32_t timestamp_wraps; /**< Count of the times that the timestamp has wrapped */
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uint32_t timestamp_clock; /**< Clock frequency of RTP timestamp values */
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uint32_t expected_ssrc; /**< The expected SSRC, if set */
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uint32_t base_seq; /**< Base seq number */
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uint32_t bad_seq; /**< Last 'bad' seq number + 1 */
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uint32_t probation; /**< Sequential packets till source is valid */
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uint32_t received; /**< RTP packets received */
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void *extra; /**< Payload specific data */
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} VC_CONTAINER_TRACK_MODULE_T;
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/** Determine minimum number of bytes needed to hold a number of bits */
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#define BITS_TO_BYTES(X) (((X) + 7) >> 3)
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/** Collection of bit manipulation routines */
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/* @{ */
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#define SET_BIT(V, B) V |= (1 << (B))
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#define CLEAR_BIT(V, B) V &= ~(1 << (B))
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#define BIT_IS_SET(V, B) (!(!((V) & (1 << (B)))))
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#define BIT_IS_CLEAR(V, B) (!((V) & (1 << (B))))
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/* }@ */
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/** Get a parameter's value as a decimal number.
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*
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* \param param_list The list of parameter name/value pairs.
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* \param name The paramter's name.
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* \param value Where to put the converted value.
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* \return True if successful, false if the parameter was not found or didn't convert. */
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bool rtp_get_parameter_u32(const VC_CONTAINERS_LIST_T *param_list, const char *name, uint32_t *value);
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/** Get a parameter's value as a hexadecimal number.
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*
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* \param param_list The list of parameter name/value pairs.
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* \param name The paramter's name.
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* \param value Where to put the converted value.
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* \return True if successful, false if the parameter was not found or didn't convert. */
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bool rtp_get_parameter_x32(const VC_CONTAINERS_LIST_T *param_list, const char *name, uint32_t *value);
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#endif /* _RTP_PRIV_H_ */
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