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AudioTest.pas
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AudioTest.pas
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program AudioTest;
{$mode delphi}{$H+}
{$hints off}
{$notes off}
{ OMX Audio Test Program }
{ pjde 2018 }
uses
RaspberryPi3,
GlobalConfig,
GlobalConst,
GlobalTypes,
Platform,
Threads, VC4,
SysUtils, Winsock2, uIL_Client, uOMX, SysCalls,
Classes, Console, uTFTP, uLog,
Ultibo
{ Add additional units here };
const
ny : array [boolean] of string = ('NO', 'YES');
var
Console1, Console2, Console3 : TWindowHandle;
IPAddress : string;
AudioStream : TMemoryStream;
ch : char;
client : PILCLIENT_T;
Channels : Word;
SampleRate : LongWord;
BitsPerSample : Word;
comps : array of PCOMPONENT_T;
eos : boolean;
// General routines
procedure Log1 (s : string);
begin
ConsoleWindowWriteLn (Console1, s);
end;
procedure Log2 (s : string);
begin
ConsoleWindowWriteLn (Console2, s);
end;
procedure Log3 (s : string);
begin
ConsoleWindowWriteLn (Console3, s);
end;
procedure Msg2 (Sender : TObject; s : string);
begin
Log2 ('TFTP - ' + s);
end;
function WaitForIPComplete : string;
var
TCP : TWinsock2TCPClient;
begin
TCP := TWinsock2TCPClient.Create;
Result := TCP.LocalAddress;
if (Result = '') or (Result = '0.0.0.0') or (Result = '255.255.255.255') then
begin
while (Result = '') or (Result = '0.0.0.0') or (Result = '255.255.255.255') do
begin
sleep (1000);
Result := TCP.LocalAddress;
end;
end;
TCP.Free;
end;
procedure WaitForSDDrive;
begin
while not DirectoryExists ('C:\') do sleep (500);
end;
// Audio specific routines
function ComponentName (comp : PCOMPONENT_T) : string;
var
n : array [0..127] of char;
cv, sv : OMX_VERSIONTYPE;
cu : OMX_UUIDTYPE;
begin
Result := '';
n[0] := #0;
FillChar (n, 128, 0);
if OMX_GetComponentVersion (ilclient_get_handle (comp), n, @cv, @sv, @cu) = OMX_ErrorNone then
begin
Result := string (n);
Result := Copy (Result, 14, length (Result) - 13); // remove OMX.Broadcom.
end;
end;
procedure PrintState (handle : OMX_HANDLETYPE);
var
state : OMX_STATETYPE;
err : OMX_ERRORTYPE;
begin
err := OMX_GetState (handle, @state);
if (err <> OMX_ErrorNone) then
Log ('Error getting state.')
else
case state of
OMX_StateLoaded : Log ('State Loaded.');
OMX_StateIdle : Log ('State Idle.');
OMX_StateExecuting : Log ('State Executing.');
OMX_StatePause : Log ('State Pause.');
OMX_StateWaitForResources : Log ('State Wait.');
OMX_StateInvalid : Log ('State Invalid.');
else Log ('State Unknown');
end;
end;
procedure OpenFile (fn : string);
var
f : TFileStream;
id : string;
w : Word;
l, s : LongWord;
begin
AudioStream.Clear;
try
Log ('Opening file ' + fn);
f := TFileStream.Create (fn, fmOpenRead);
f.Seek (0, soFromBeginning);
while f.Position + 8 <= f.Size do
begin
SetLength (id, 4);
f.Read (id[1], 4);
f.Read (s, 4);
if id = 'RIFF' then // main chunk
f.Read (id[1], 4) // read id
else // sub chunk
begin
if id = 'fmt ' then
begin
f.read (w, 2); // Audio Format
f.read (Channels, 2);
Log ('Num Channels : ' + Channels.ToString);
f.Read (SampleRate, 4);
Log ('Sample Rate : ' + SampleRate.ToString);
f.Read (l, 4); // Byte Rate
f.read (w, 2); // Block Align
f.read (BitsPerSample, 2);
Log ('Bits per sample : ' + BitsPerSample.ToString);
if s > 16 then f.Seek (s - 16, soFromCurrent); // ignore extras for moment
end
else if id = 'data' then
begin
AudioStream.CopyFrom (f, s); // copy data to audio stream
Log ('Audio Stream is ' + AudioStream.Size.ToString + ' bytes long.');
end
else
f.Seek (s, soFromCurrent)
end;
end;
f.Free;
except
on e : exception do
Log ('Error opening "' + fn + '". ' + e.Message);
end;
end;
procedure port_settings_callback (userdata : pointer; comp : PCOMPONENT_T; data : LongWord); cdecl;
begin
//
end;
procedure empty_buffer_callback (userdata : pointer; comp : PCOMPONENT_T; data : LongWord); cdecl;
begin
//
end;
procedure fill_buffer_callback (userdata : pointer; comp : PCOMPONENT_T; data : LongWord); cdecl;
begin
//
end;
procedure eos_callback (userdata : pointer; comp : PCOMPONENT_T; data : LongWord); cdecl;
begin
Log (ComponentName (comp) + ' End Of Stream Detected.');
eos := true;
end;
procedure error_callback (userdata : pointer; comp : PCOMPONENT_T; data : LongWord); cdecl;
begin
Log (ComponentName (comp) + ' Error : ' + OMX_ErrToStr (data));
end;
function read_into_buffer_and_empty (comp : PCOMPONENT_T;
buff : POMX_BUFFERHEADERTYPE) : OMX_ERRORTYPE;
var
buff_size : integer;
read : integer;
begin
buff_size := buff.nAllocLen;
read := AudioStream.Size - AudioStream.Position;
if read > buff_size then read := buff_size;
AudioStream.Read (buff.pBuffer^, read);
buff.nFilledLen := read;
if AudioStream.Position = AudioStream.Size then
buff.nFlags := buff.nFlags or OMX_BUFFERFLAG_EOS;
Result := OMX_EmptyThisBuffer (ilclient_get_handle (comps[0]), buff);
end;
procedure OMXCheck (n : string; r : OMX_ERRORTYPE);
begin
if r <> OMX_ErrorNone then raise Exception.Create (n + ' ' + OMX_ErrToStr (r));
end;
procedure ILCheck (n : string; e : integer);
begin
if e <> 0 then raise Exception.Create (n + ' Failed');
end;
procedure PlayFile (dn : string);
var
res : integer;
param : OMX_PARAM_PORTDEFINITIONTYPE;
pcm : OMX_AUDIO_PARAM_PCMMODETYPE;
dest : OMX_CONFIG_BRCMAUDIODESTINATIONTYPE;
hdr : POMX_BUFFERHEADERTYPE;
begin
if not (Channels in [1 .. 2]) then exit;
if AudioStream = nil then exit;
if AudioStream.Size = 0 then exit;
AudioStream.Seek (0, soFromBeginning);
SetLength (comps, 2);
client := nil;
eos := false;
for res := low (comps) to high (comps) do comps[res] := nil;
// initialise OMX and IL client
try
OMXCheck ('OMX Init', OMX_Init);
client := ilclient_init;
// set callbacks
ilclient_set_port_settings_callback (client, @port_settings_callback, nil);
ilclient_set_empty_buffer_done_callback (client, @empty_buffer_callback, nil);
ilclient_set_fill_buffer_done_callback (client, @fill_buffer_callback, nil);
ilclient_set_eos_callback (client, @eos_callback, nil);
ilclient_set_error_callback (client, @error_callback, nil);
// create render
ILCheck ('Create Render', ilclient_create_component (client, @comps[0], 'audio_render', ILCLIENT_ENABLE_INPUT_BUFFERS or ILCLIENT_DISABLE_ALL_PORTS));
// confirm port is set to pcm
FillChar (param, sizeof (OMX_PARAM_PORTDEFINITIONTYPE), 0);
param.nSize := sizeof (OMX_PARAM_PORTDEFINITIONTYPE);
param.nVersion.nVersion := OMX_VERSION;
param.nPortIndex := 100; // audio input
OMXCheck ('Get Port', OMX_GetParameter (ilclient_get_handle (comps[0]), OMX_IndexParamPortDefinition, @param));
param.format.audio.eEncoding := OMX_AUDIO_CodingPCM;
OMXCheck ('Set Port ', OMX_SetParameter (ilclient_get_handle (comps[0]), OMX_IndexParamPortDefinition, @param));
// set sampling rate, channels and bits per sample
FillChar (pcm, sizeof (OMX_AUDIO_PARAM_PCMMODETYPE), 0);
pcm.nSize := sizeof (OMX_AUDIO_PARAM_PCMMODETYPE);
pcm.nVersion.nVersion := OMX_VERSION;
pcm.nPortIndex := 100;
OMXCheck ('Get PCM',OMX_GetParameter (ilclient_get_handle (comps[0]), OMX_IndexParamAudioPcm, @pcm));
pcm.nChannels := Channels;
pcm.nBitPerSample := BitsPerSample;
pcm.nSamplingRate := SampleRate;
FillChar (pcm.eChannelMapping, sizeof (pcm.eChannelMapping), 0);
case Channels of
1 :
begin
pcm.eChannelMapping[0] := OMX_AUDIO_ChannelCF;
end;
2 :
begin
pcm.eChannelMapping[1] := OMX_AUDIO_ChannelRF;
pcm.eChannelMapping[0] := OMX_AUDIO_ChannelLF;
end;
end;
OMXCheck ('Set PCM', OMX_SetParameter (ilclient_get_handle (comps[0]), OMX_IndexParamAudioPcm, @pcm));
// set to idle and enable buffers
ilclient_change_component_state (comps[0], OMX_StateIdle);
ILCheck ('Enable Buffers', ilclient_enable_port_buffers (comps[0], 100, nil, nil, nil));
ilclient_enable_port (comps[0], 100);
// set to executing
ilclient_change_component_state (comps[0], OMX_StateExecuting);
// set destination
dest.nSize:= sizeof (OMX_CONFIG_BRCMAUDIODESTINATIONTYPE);
dest.nVersion.nVersion := OMX_VERSION;
FillChar (dest.sName, sizeof (dest.sName), 0);
dest.sName := dn;
OMXCheck ('Set Dest', OMX_SetConfig (ilclient_get_handle (comps[0]), OMX_IndexConfigBrcmAudioDestination, @dest));
while AudioStream.Position < AudioStream.Size do
begin
hdr := ilclient_get_input_buffer (comps[0], 100, 1);
if hdr <> nil then read_into_buffer_and_empty (comps[0], hdr);
end;
while not eos do sleep (100);
finally
ilclient_change_component_state (comps[0], OMX_StateLoaded);
ilclient_cleanup_components (@comps[0]);
ilclient_destroy (client);
client := nil;
OMX_DeInit;
end;
Log ('End of Playback ...');
end;
begin
Console1 := ConsoleWindowCreate (ConsoleDeviceGetDefault, CONSOLE_POSITION_LEFT, true);
Console2 := ConsoleWindowCreate (ConsoleDeviceGetDefault, CONSOLE_POSITION_TOPRIGHT, false);
Console3 := ConsoleWindowCreate (ConsoleDeviceGetDefault, CONSOLE_POSITION_BOTTOMRIGHT, false);
SetLogProc (@Log1);
Log3 ('Audio Test using OpenMax (OMX).');
WaitForSDDrive;
Log2 ('SD Drive ready.');
Log2 ('');
Log3 ('C - Clear.');
Log3 ('1 - Load File.');
Log3 ('2 - Play File to 3.5mm plug.');
Log3 ('3 - Play File to hdmi.');
Log3 ('');
IPAddress := WaitForIPComplete;
Log3 ('Network ready. Local Address : ' + IPAddress + '.');
Log3 ('');
Log2 ('TFTP - Syntax "tftp -i ' + IPAddress + ' put kernel7.img"');
SetOnMsg (@Msg2);
BCMHostInit;
AudioStream := TMemoryStream.Create;
ch := #0;
while true do
begin
if ConsoleGetKey (ch, nil) then
case ch of
'C' : ConsoleWindowClear (Console1);
'1' : OpenFile ('tada.wav');
'2' : PlayFile ('local');
'3' : PlayFile ('hdmi');
'Q', 'q' : break;
end;
end;
Log ('Halted.');
AudioStream.Free;
ThreadHalt (0);
end.