Libav
rtmppkt.h
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1 /*
2  * RTMP packet utilities
3  * Copyright (c) 2009 Konstantin Shishkov
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #ifndef AVFORMAT_RTMPPKT_H
23 #define AVFORMAT_RTMPPKT_H
24 
25 #include "libavcodec/bytestream.h"
26 #include "avformat.h"
27 #include "url.h"
28 
30 #define RTMP_CHANNELS 65599
31 
42 };
43 
47 typedef enum RTMPPacketType {
63 
72 };
73 
77 typedef struct RTMPPacket {
78  int channel_id;
80  uint32_t timestamp;
81  uint32_t ts_field;
82  uint32_t extra;
84  int size;
85  int offset;
86  int read;
87 } RTMPPacket;
88 
100  int timestamp, int size);
101 
108 
121  int chunk_size, RTMPPacket **prev_pkt,
122  int *nb_prev_pkt);
135 int ff_rtmp_packet_read_internal(URLContext *h, RTMPPacket *p, int chunk_size,
136  RTMPPacket **prev_pkt, int *nb_prev_pkt,
137  uint8_t c);
138 
151  int chunk_size, RTMPPacket **prev_pkt,
152  int *nb_prev_pkt);
153 
160 void ff_rtmp_packet_dump(void *ctx, RTMPPacket *p);
161 
169 int ff_rtmp_check_alloc_array(RTMPPacket **prev_pkt, int *nb_prev_pkt,
170  int channel);
171 
185 int ff_amf_tag_size(const uint8_t *data, const uint8_t *data_end);
186 
197 int ff_amf_get_field_value(const uint8_t *data, const uint8_t *data_end,
198  const uint8_t *name, uint8_t *dst, int dst_size);
199 
206 void ff_amf_write_bool(uint8_t **dst, int val);
207 
214 void ff_amf_write_number(uint8_t **dst, double num);
215 
222 void ff_amf_write_string(uint8_t **dst, const char *str);
223 
231 void ff_amf_write_string2(uint8_t **dst, const char *str1, const char *str2);
232 
238 void ff_amf_write_null(uint8_t **dst);
239 
246 
253 void ff_amf_write_field_name(uint8_t **dst, const char *str);
254 
260 void ff_amf_write_object_end(uint8_t **dst);
261 
269 int ff_amf_read_bool(GetByteContext *gbc, int *val);
270 
278 int ff_amf_read_number(GetByteContext *gbc, double *val);
279 
295  int strsize, int *length);
296 
310  int strsize, int *length);
311 
319 
326 int ff_amf_match_string(const uint8_t *data, int size, const char *str);
327  // AMF funcs
329 
330 #endif /* AVFORMAT_RTMPPKT_H */
void ff_rtmp_packet_destroy(RTMPPacket *pkt)
Free RTMP packet.
Definition: rtmppkt.c:412
video packet
Definition: rtmppkt.h:54
int ff_rtmp_packet_create(RTMPPacket *pkt, int channel_id, RTMPPacketType type, int timestamp, int size)
Create new RTMP packet with given attributes.
Definition: rtmppkt.c:394
client bandwidth
Definition: rtmppkt.h:52
RTMPChannel
channels used to for RTMP packets with different purposes (i.e.
Definition: rtmppkt.h:36
int ff_amf_read_number(GetByteContext *gbc, double *val)
Read AMF number value.
Definition: rtmppkt.c:95
int ff_amf_read_string(GetByteContext *gbc, uint8_t *str, int strsize, int *length)
Read AMF string value.
Definition: rtmppkt.c:123
void ff_amf_write_number(uint8_t **dst, double num)
Write number in AMF format to buffer.
Definition: rtmppkt.c:37
RTMPPacketType type
packet payload type
Definition: rtmppkt.h:79
channel for a/v invokes
Definition: rtmppkt.h:41
ping
Definition: rtmppkt.h:50
void ff_amf_write_bool(uint8_t **dst, int val)
Write boolean value in AMF format to buffer.
Definition: rtmppkt.c:31
uint8_t
int read
amount read, including headers
Definition: rtmppkt.h:86
uint32_t extra
probably an additional channel ID used during streaming data
Definition: rtmppkt.h:82
void ff_amf_write_null(uint8_t **dst)
Write AMF NULL value to buffer.
Definition: rtmppkt.c:63
const char * name
int ff_amf_get_string(GetByteContext *bc, uint8_t *str, int strsize, int *length)
Get AMF string value.
Definition: rtmppkt.c:105
int ff_rtmp_packet_read(URLContext *h, RTMPPacket *p, int chunk_size, RTMPPacket **prev_pkt, int *nb_prev_pkt)
Read RTMP packet sent by the server.
Definition: rtmppkt.c:159
int size
packet payload size
Definition: rtmppkt.h:84
number of bytes read
Definition: rtmppkt.h:49
int ff_amf_read_null(GetByteContext *gbc)
Read AMF NULL value.
Definition: rtmppkt.c:131
packet has 4-byte header
Definition: rtmppkt.h:70
int ff_amf_read_bool(GetByteContext *gbc, int *val)
Read AMF boolean value.
Definition: rtmppkt.c:87
void ff_amf_write_string(uint8_t **dst, const char *str)
Write string in AMF format to buffer.
Definition: rtmppkt.c:43
audio packet
Definition: rtmppkt.h:53
void ff_amf_write_field_name(uint8_t **dst, const char *str)
Write string used as field name in AMF object to buffer.
Definition: rtmppkt.c:73
packet has 12-byte header
Definition: rtmppkt.h:68
int ff_amf_tag_size(const uint8_t *data, const uint8_t *data_end)
Calculate number of bytes taken by first AMF entry in data.
Definition: rtmppkt.c:420
RTMPPacketSize
possible RTMP packet header sizes
Definition: rtmppkt.h:67
server bandwidth
Definition: rtmppkt.h:51
RTMPPacketType
known RTMP packet types
Definition: rtmppkt.h:47
shared object
Definition: rtmppkt.h:59
void ff_amf_write_string2(uint8_t **dst, const char *str1, const char *str2)
Write a string consisting of two parts in AMF format to a buffer.
Definition: rtmppkt.c:50
int ff_rtmp_packet_write(URLContext *h, RTMPPacket *p, int chunk_size, RTMPPacket **prev_pkt, int *nb_prev_pkt)
Send RTMP packet to the server.
Definition: rtmppkt.c:304
Flex shared message.
Definition: rtmppkt.h:57
int ff_amf_match_string(const uint8_t *data, int size, const char *str)
Match AMF string with a NULL-terminated string.
Definition: rtmppkt.c:627
chunk size change
Definition: rtmppkt.h:48
Definition: url.h:41
channel for sending server control messages
Definition: rtmppkt.h:38
uint32_t ts_field
24-bit timestamp or increment to the previous one, in milliseconds (latter only for media packets)...
Definition: rtmppkt.h:81
void ff_rtmp_packet_dump(void *ctx, RTMPPacket *p)
Print information and contents of RTMP packet.
Definition: rtmppkt.c:601
int channel_id
RTMP channel ID (nothing to do with audio/video channels though)
Definition: rtmppkt.h:78
packet has 8-byte header
Definition: rtmppkt.h:69
void ff_amf_write_object_start(uint8_t **dst)
Write marker for AMF object to buffer.
Definition: rtmppkt.c:68
channel for audio data
Definition: rtmppkt.h:39
int ff_amf_get_field_value(const uint8_t *data, const uint8_t *data_end, const uint8_t *name, uint8_t *dst, int dst_size)
Retrieve value of given AMF object field in string form.
Definition: rtmppkt.c:463
some notification
Definition: rtmppkt.h:58
int ff_rtmp_packet_read_internal(URLContext *h, RTMPPacket *p, int chunk_size, RTMPPacket **prev_pkt, int *nb_prev_pkt, uint8_t c)
Read internal RTMP packet sent by the server.
Definition: rtmppkt.c:289
channel for network-related messages (bandwidth report, ping, etc)
Definition: rtmppkt.h:37
uint32_t timestamp
packet full timestamp
Definition: rtmppkt.h:80
uint8_t * data
packet payload
Definition: rtmppkt.h:83
int offset
amount of data read so far
Definition: rtmppkt.h:85
Main libavformat public API header.
Flex shared stream.
Definition: rtmppkt.h:55
channel for video data
Definition: rtmppkt.h:40
packet is really a next chunk of a packet
Definition: rtmppkt.h:71
Flex shared object.
Definition: rtmppkt.h:56
structure for holding RTMP packets
Definition: rtmppkt.h:77
unbuffered private I/O API
invoke some stream action
Definition: rtmppkt.h:60
void ff_amf_write_object_end(uint8_t **dst)
Write marker for end of AMF object to buffer.
Definition: rtmppkt.c:79
FLV metadata.
Definition: rtmppkt.h:61
int ff_rtmp_check_alloc_array(RTMPPacket **prev_pkt, int *nb_prev_pkt, int channel)
Enlarge the prev_pkt array to fit the given channel.
Definition: rtmppkt.c:138