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contrib/rtp: Use payload data files directly by gen_rtp_header

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This adds a --frame-size option to read payload binary files with a
fixed frame size directly. The file must not contain RTP headers.
In addition '--rate' and '--duration' can be used to configure the
timing.

Sponsored-by: On-Waves ehf
This commit is contained in:
Jacob Erlbeck
2014-03-14 18:06:23 +01:00
parent 10bad1031e
commit 543e11496e
1 changed files with 30 additions and 4 deletions
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34
openbsc/contrib/rtp/gen_rtp_header.erl
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@@ -28,6 +28,7 @@
main(Args) ->
DefaultOpts = [{format, state},
{ssrc, 16#11223344},
{rate, 8000},
{pt, 98}],
{PosArgs, Opts} = getopts_checked(Args, DefaultOpts),
log(debug, fun (Dev) ->
@@ -144,7 +145,8 @@ show_help() ->
"Options:~n" ++
" -h, --help this text~n" ++
" --version show version info~n" ++
" -i, --file=FILE reads payload from state file~n" ++
" -i, --file=FILE reads payload from file (state format by default)~n" ++
" -f, --frame-size=N read payload as binary frames of size N instead~n" ++
" -p, --payload=HEX set constant payload~n" ++
" --verbose=N set verbosity~n" ++
" -v increase verbosity~n" ++
@@ -153,6 +155,8 @@ show_help() ->
" --format=carray use a C array for output~n" ++
" -s, --ssrc=SSRC set the SSRC~n" ++
" -t, --type=N set the payload type~n" ++
" -r, --rate=N set the RTP rate [8000]~n" ++
" -D, --duration=N set the packet duration in RTP time units [160]~n" ++
" -d, --delay=FLOAT add offset to playout timestamp~n" ++
"~n" ++
"Arguments:~n" ++
@@ -165,6 +169,21 @@ getopts([ "--file=" ++ File | R], Opts) ->
getopts(R, [{file, File} | Opts]);
getopts([ "-i" ++ T | R], Opts) ->
getopts_alias_arg("--file", T, R, Opts);
getopts([ "--frame-size=" ++ N | R], Opts) ->
Size = list_to_integer(N),
getopts(R, [{frame_size, Size}, {in_format, bin} | Opts]);
getopts([ "-f" ++ T | R], Opts) ->
getopts_alias_arg("--frame-size", T, R, Opts);
getopts([ "--duration=" ++ N | R], Opts) ->
Duration = list_to_integer(N),
getopts(R, [{duration, Duration} | Opts]);
getopts([ "-D" ++ T | R], Opts) ->
getopts_alias_arg("--duration", T, R, Opts);
getopts([ "--rate=" ++ N | R], Opts) ->
Rate = list_to_integer(N),
getopts(R, [{rate, Rate} | Opts]);
getopts([ "-r" ++ T | R], Opts) ->
getopts_alias_arg("--rate", T, R, Opts);
getopts([ "--version" | _], _Opts) ->
show_version(),
halt(0);
@@ -328,9 +347,10 @@ write_packets(Dev, DataSource, P = #rtp_packet{}, F, L, O, Opts) ->
Format = proplists:get_value(format, Opts, state),
Ptime = proplists:get_value(duration, Opts, 160),
Delay = proplists:get_value(delay, Opts, 0),
Rate = proplists:get_value(rate, Opts, 8000),
case next_payload(DataSource) of
{Payload, DataSource2} ->
write_packet(Dev, 0.020 * F + Delay,
write_packet(Dev, Ptime * F / Rate + Delay,
P#rtp_packet{seqno = F, timestamp = F*Ptime+O,
payload = Payload},
Format),
@@ -376,12 +396,18 @@ read_packets(Dev, Opts) ->
read_packets(Dev, Opts, Format).
read_packets(Dev, Opts, Format) ->
case read_packet(Dev, Format) of
case read_packet(Dev, Opts, Format) of
eof -> [];
Tuple -> [Tuple | read_packets(Dev, Opts, Format)]
end.
read_packet(Dev, Format) ->
read_packet(Dev, Opts, bin) ->
Size = proplists:get_value(frame_size, Opts),
case file:read(Dev, Size) of
{ok, Data} -> {0, #rtp_packet{payload = iolist_to_binary(Data)}};
eof -> eof
end;
read_packet(Dev, _Opts, Format) ->
case read_packet_line(Dev, Format) of
{Time, Bin} -> {Time, parse_rtp_packet(Bin)};
eof -> eof