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rtmp: support connection parameters

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Allow using connection parameters in order to append arbitrary
AMF data like "B:1 S:authMe O:1 NN:code:1.23 NS:flag:ok O:0" to the
Connect message. You can pass these parameters through the -rtmp_conn
option.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Samuel Pitoiset 2012-06-08 13:16:34 +02:00 committed by Martin Storsjö
parent b4c92e94bb
commit 8ee3e1874e
2 changed files with 89 additions and 0 deletions
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12
doc/protocols.texi
View File

@ -198,6 +198,18 @@ Additionally, the following parameters can be set via command line options
Name of application to connect on the RTMP server. This option
overrides the parameter specified in the URI.
@item rtmp_conn
Extra arbitrary AMF connection parameters, parsed from a string,
e.g. like @code{B:1 S:authMe O:1 NN:code:1.23 NS:flag:ok O:0}.
Each value is prefixed by a single character denoting the type,
B for Boolean, N for number, S for string, O for object, or Z for null,
followed by a colon. For Booleans the data must be either 0 or 1 for
FALSE or TRUE, respectively. Likewise for Objects the data must be 0 or
1 to end or begin an object, respectively. Data items in subobjects may
be named, by prefixing the type with 'N' and specifying the name before
the value (i.e. @code{NB:myFlag:1}). This option may be used multiple
times to construct arbitrary AMF sequences.
@item rtmp_flashver
Version of the Flash plugin used to run the SWF player. The default
is LNX 9,0,124,2.

77
libavformat/rtmpproto.c
View File

@ -70,6 +70,7 @@ typedef struct RTMPContext {
char *playpath; ///< stream identifier to play (with possible "mp4:" prefix)
int live; ///< 0: recorded, -1: live, -2: both
char *app; ///< name of application
char *conn; ///< append arbitrary AMF data to the Connect message
ClientState state; ///< current state
int main_channel_id; ///< an additional channel ID which is used for some invocations
uint8_t* flv_data; ///< buffer with data for demuxer
@ -112,6 +113,65 @@ static const uint8_t rtmp_server_key[] = {
0xE6, 0x36, 0xCF, 0xEB, 0x31, 0xAE
};
static int rtmp_write_amf_data(URLContext *s, char *param, uint8_t **p)
{
char *field, *value, *saveptr;
char type;
/* The type must be B for Boolean, N for number, S for string, O for
* object, or Z for null. For Booleans the data must be either 0 or 1 for
* FALSE or TRUE, respectively. Likewise for Objects the data must be
* 0 or 1 to end or begin an object, respectively. Data items in subobjects
* may be named, by prefixing the type with 'N' and specifying the name
* before the value (ie. NB:myFlag:1). This option may be used multiple times
* to construct arbitrary AMF sequences. */
if (param[0] && param[1] == ':') {
type = param[0];
value = param + 2;
} else if (param[0] == 'N' && param[1] && param[2] == ':') {
type = param[1];
field = strtok_r(param + 3, ":", &saveptr);
value = strtok_r(NULL, ":", &saveptr);
if (!field || !value)
goto fail;
ff_amf_write_field_name(p, field);
} else {
goto fail;
}
switch (type) {
case 'B':
ff_amf_write_bool(p, value[0] != '0');
break;
case 'S':
ff_amf_write_string(p, value);
break;
case 'N':
ff_amf_write_number(p, strtod(value, NULL));
break;
case 'Z':
ff_amf_write_null(p);
break;
case 'O':
if (value[0] != '0')
ff_amf_write_object_start(p);
else
ff_amf_write_object_end(p);
break;
default:
goto fail;
break;
}
return 0;
fail:
av_log(s, AV_LOG_ERROR, "Invalid AMF parameter: %s\n", param);
return AVERROR(EINVAL);
}
/**
* Generate 'connect' call and send it to the server.
*/
@ -165,6 +225,22 @@ static int gen_connect(URLContext *s, RTMPContext *rt)
}
ff_amf_write_object_end(&p);
if (rt->conn) {
char *param, *saveptr;
// Write arbitrary AMF data to the Connect message.
param = strtok_r(rt->conn, " ", &saveptr);
while (param != NULL) {
if ((ret = rtmp_write_amf_data(s, param, &p)) < 0) {
// Invalid AMF parameter.
ff_rtmp_packet_destroy(&pkt);
return ret;
}
param = strtok_r(NULL, " ", &saveptr);
}
}
pkt.data_size = p - pkt.data;
ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->chunk_size,
@ -1248,6 +1324,7 @@ static int rtmp_write(URLContext *s, const uint8_t *buf, int size)
static const AVOption rtmp_options[] = {
{"rtmp_app", "Name of application to connect to on the RTMP server", OFFSET(app), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
{"rtmp_conn", "Append arbitrary AMF data to the Connect message", OFFSET(conn), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
{"rtmp_flashver", "Version of the Flash plugin used to run the SWF player.", OFFSET(flashver), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
{"rtmp_live", "Specify that the media is a live stream.", OFFSET(live), AV_OPT_TYPE_INT, {-2}, INT_MIN, INT_MAX, DEC, "rtmp_live"},
{"any", "both", 0, AV_OPT_TYPE_CONST, {-2}, 0, 0, DEC, "rtmp_live"},