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-rw-r--r--Game/Code/Classes/UAudio_FFMpeg.pas153
1 files changed, 102 insertions, 51 deletions
diff --git a/Game/Code/Classes/UAudio_FFMpeg.pas b/Game/Code/Classes/UAudio_FFMpeg.pas
index 548fb343..35822a3b 100644
--- a/Game/Code/Classes/UAudio_FFMpeg.pas
+++ b/Game/Code/Classes/UAudio_FFMpeg.pas
@@ -7,6 +7,8 @@ This unit is primarily based upon -
and tutorial03.c
+ http://www.inb.uni-luebeck.de/~boehme/using_libavcodec.html
+
*******************************************************************************)
interface
@@ -25,10 +27,10 @@ uses Classes,
{$IFNDEF FPC}
Forms,
{$ENDIF}
+ SDL, // Used for Audio output Interface
avcodec, // FFMpeg Audio file decoding
avformat,
avutil,
- SDL, // Used for Audio output Interface
ULog,
UMusic;
@@ -47,19 +49,28 @@ type
function packet_queue_get(var aPacketQueue : TPacketQueue; var AVPacket : TAVPacket; block : integer ): integer;
procedure packet_queue_init( var aPacketQueue : TPacketQueue );
procedure audio_callback( userdata: Pointer; stream: PUInt8; len: Integer ); cdecl;
- function audio_decode_frame(aCodecCtx : TAVCodecContext; audio_buf : PUInt8; buf_size: integer): integer;
+ function audio_decode_frame(aCodecCtx : TAVCodecContext; aAudio_buf : PUInt8; buf_size: integer): integer;
var
singleton_MusicFFMpeg : IAudioPlayback = nil;
+var
+ audioq : TPacketQueue;
+ quit : integer = 0;
+// faudio_buf : array[ 0 .. 0 ] of byte; //pUInt8{$ifndef fpc};{$else} = nil;{$endif}
+// audio_buf : array[ 0 .. AVCODEC_MAX_AUDIO_FRAME_SIZE ] of byte; //pUInt8{$ifndef fpc};{$else} = nil;{$endif}
+
+type
+ Taudiobuff = array[ 0 .. AVCODEC_MAX_AUDIO_FRAME_SIZE ] of byte;
+ PAudioBuff = ^Taudiobuff;
implementation
uses
{$IFDEF FPC}
lclintf,
- {$ENDIF}
libc,
+ {$ENDIF}
// URecord,
UIni,
UMain,
@@ -82,9 +93,6 @@ type
const
ModeStr: array[TMPModes] of string = ('Not ready', 'Stopped', 'Playing', 'Recording', 'Seeking', 'Paused', 'Open');
-var
- audioq : TPacketQueue;
- quit : integer = 0;
type
@@ -154,7 +162,7 @@ end;
constructor TAudio_ffMpeg.create();
begin
- writeln( 'UVideo_FFMpeg - av_register_all' );
+// writeln( 'UVideo_FFMpeg - av_register_all' );
av_register_all;
end;
@@ -170,20 +178,20 @@ begin
i := 0;
while ( i < aFormatCtx.nb_streams ) do
begin
- writeln( ' aFormatCtx.streams[i] : ' + inttostr( i ) );
+// writeln( ' aFormatCtx.streams[i] : ' + inttostr( i ) );
st := aFormatCtx.streams[i];
if(st.codec.codec_type = CODEC_TYPE_VIDEO ) AND
(aFirstVideoStream < 0) THEN
begin
- writeln( 'Found Video Stream' );
+// writeln( 'Found Video Stream' );
aFirstVideoStream := i;
end;
if ( st.codec.codec_type = CODEC_TYPE_AUDIO ) AND
( aFirstAudioStream < 0) THEN
begin
- writeln( 'Found Audio Stream' );
+// writeln( 'Found Audio Stream' );
aFirstAudioStream := i;
end;
@@ -206,8 +214,8 @@ var
S: integer;
begin
- LoadSoundFromFile(BassStart, SoundPath + 'foo fighters - best of you.mp3');
-
+// LoadSoundFromFile(BassStart, SoundPath + 'Green Day - American Idiot.mp3');
+
(*
LoadSoundFromFile(BassStart, SoundPath + 'Common start.mp3');
LoadSoundFromFile(BassBack, SoundPath + 'Common back.mp3');
@@ -438,12 +446,13 @@ end;
procedure TAudio_ffMpeg.StopCard(Card: byte);
begin
+
// TODO : jb_linux replace with something other than bass
// BASS_RecordSetDevice(Card);
// BASS_RecordFree;
end;
-function audio_decode_frame(aCodecCtx : TAVCodecContext; audio_buf : PUInt8; buf_size: integer): integer;
+function audio_decode_frame(aCodecCtx : TAVCodecContext; aAudio_buf : PUInt8; buf_size: integer): integer;
var
pkt : TAVPacket;
audio_pkt_data : pchar;//PUInt8 = nil;
@@ -451,26 +460,44 @@ var
len1 ,
data_size : integer;
begin
-// result := 1;
-// exit;
+ {$ifdef win32}
+ FillChar(pkt, sizeof(pkt), #0);
+ {$else}
+ memset(@pkt, 0, sizeof(pkt)); // todo : jb memset
+ {$endif}
+
+ audio_pkt_data := nil;
+ audio_pkt_size := 0;
while true do
begin
while ( audio_pkt_size > 0 ) do
begin
- writeln( 'got audio packet' );
+// writeln( 'got audio packet' );
data_size := buf_size;
-
-// len1 := avcodec_decode_audio2(aCodecCtx, (int16_t )audio_buf, &data_size, audio_pkt_data, audio_pkt_size);
- len1 := avcodec_decode_audio(@aCodecCtx, PWord( audio_buf ), data_size, audio_pkt_data, audio_pkt_size); // Todo.. should be avcodec_decode_audio2 but this wont link on my ubuntu box.
+
+ len1 := -1;
+
+ if aAudio_buf <> nil then
+ begin
+// writeln( 'pre avcodec_decode_audio' );
+ {$ifdef fpc}
+ len1 := avcodec_decode_audio(@aCodecCtx, PWord( aAudio_buf ), data_size, audio_pkt_data, audio_pkt_size); // Todo.. should be avcodec_decode_audio2 but this wont link on my ubuntu box.
+ {$else}
+ len1 := avcodec_decode_audio(@aCodecCtx, Pointer( aAudio_buf ), data_size, audio_pkt_data, audio_pkt_size); // Todo.. should be avcodec_decode_audio2 but this wont link on my ubuntu box.
+ {$endif}
+// writeln( 'post avcodec_decode_audio' );
+
+ end;
// writeln('avcodec_decode_audio');
if(len1 < 0) then
begin
//* if error, skip frame */
- audio_pkt_size := 0;
+// writeln( 'Skip audio frame' );
+ audio_pkt_size := 0;
break;
end;
@@ -506,7 +533,7 @@ begin
audio_pkt_data := pchar( pkt.data );
audio_pkt_size := pkt.size;
- writeln( 'Audio Packet Size - ' + inttostr(audio_pkt_size) );
+// writeln( 'Audio Packet Size - ' + inttostr(audio_pkt_size) );
end;
end;
@@ -517,52 +544,69 @@ var
audio_size ,
len1 : integer;
aCodecCtx : TAVCodecContext;
- audio_buf : pUInt8 = nil;
+
+ lSrc : pointer;
+
+ // this is used to emulate ...... static uint8_t audio_buf[(AVCODEC_MAX_AUDIO_FRAME_SIZE * 3) / 2];
+ lAudio_buf_data : Taudiobuff; // This created the memory we need
+ laudio_buf : PAudioBuff; // this makes it easy to work with.. since its the pointer to that memeory everywhere
begin
- aCodecCtx := pAVCodecContext(userdata)^;
- audio_buf := UInt8( (AVCODEC_MAX_AUDIO_FRAME_SIZE * 3) div 2); // todo : JB
- audio_size := -1;
+ laudio_buf := @lAudio_buf_data ;
-// writeln('----------- audio callback' );
+ aCodecCtx := pAVCodecContext(userdata)^;
+ audio_size := -1;
+ audio_buf_index := 0;
+ audio_buf_size := 0;
while (len > 0) do
begin
if(audio_buf_index >= audio_buf_size) then
begin
// We have already sent all our data; get more */
- audio_size := audio_decode_frame(aCodecCtx, audio_buf, sizeof(audio_buf));
+ audio_size := audio_decode_frame(aCodecCtx, pUInt8( laudio_buf ), sizeof(laudio_buf));
if(audio_size < 0) then
begin
// If error, output silence */
audio_buf_size := 1024; // arbitrary?
- memset(audio_buf, 0, audio_buf_size); // todo : jb memset
+
+ {$ifdef win32}
+ FillChar(laudio_buf, audio_buf_size, #0);
+ {$else}
+ memset(laudio_buf, 0, audio_buf_size); // todo : jb memset
+ {$endif}
end
else
begin
audio_buf_size := audio_size;
end;
-// audio_buf_index := 0; // Todo : jb - SegFault ?
+ audio_buf_index := 0; // Todo : jb - SegFault ?
end;
len1 := audio_buf_size - audio_buf_index;
if (len1 > len) then
len1 := len;
-
- memcpy(stream, PUInt8( audio_buf ) + audio_buf_index , len1);
- len := len - len1;
- stream := stream + len1;
+
+ {$ifdef win32}
+ lSrc := PUInt8( integer( laudio_buf ) + audio_buf_index );
+ CopyMemory(stream, lSrc , len1);
+ {$else}
+ memcpy(stream, PUInt8( laudio_buf ) + audio_buf_index , len1);
+ {$endif}
+
+ len := len - len1;
+ stream^ := stream^ + len1;
audio_buf_index := audio_buf_index + len1;
end;
end;
function TAudio_ffMpeg.LoadSoundFromFile(var hStream: hStream; Name: string): boolean;
var
- L: Integer;
- pFormatCtx: PAVFormatContext;
+ L : Integer;
+ pFormatCtx : PAVFormatContext;
lVidStreamID ,
lAudStreamID : Integer;
aCodecCtx : pAVCodecContext;
@@ -578,7 +622,7 @@ begin
if FileExists(Name) then
begin
- writeln('Loading Sound: "' + Name + '"', 'LoadSoundFromFile');
+// writeln('Loading Sound: "' + Name + '"', 'LoadSoundFromFile');
// Open video file
if (av_open_input_file(pFormatCtx, pchar(Name), nil, 0, nil) > 0) then
@@ -593,11 +637,11 @@ begin
if not find_stream_ids( pFormatCtx, lVidStreamID, lAudStreamID ) then
exit;
- writeln( 'done searching for stream ids' );
+// writeln( 'done searching for stream ids' );
if lAudStreamID > -1 then
begin
- writeln( 'Audio Stream ID is : '+ inttostr( lAudStreamID ) );
+// writeln( 'Audio Stream ID is : '+ inttostr( lAudStreamID ) );
lAudioStream := pFormatCtx.streams[lAudStreamID];
aCodecCtx := lAudioStream.codec;
@@ -617,9 +661,9 @@ begin
writeln('SDL_OpenAudio: '+SDL_GetError());
exit
end;
-
- writeln( 'SDL opened audio device' );
-
+
+// writeln( 'SDL opened audio device' );
+
aCodec := avcodec_find_decoder(aCodecCtx.codec_id);
if (aCodec = nil) then
begin
@@ -629,27 +673,28 @@ begin
avcodec_open(aCodecCtx, aCodec);
- writeln( 'Opened the codec' );
+// writeln( 'Opened the codec' );
packet_queue_init( audioq );
SDL_PauseAudio(0);
- writeln( 'SDL_PauseAudio' );
+// writeln( 'SDL_PauseAudio' );
i := 0;
- while (av_read_frame(pFormatCtx, packet)>=0) do
+ while (av_read_frame(pFormatCtx, packet) >= 0) do
begin
- writeln( 'ffmpeg - av_read_frame' );
+// writeln( 'ffmpeg - av_read_frame' );
if (packet.stream_index = lAudStreamID ) then
begin
+// writeln( 'packet_queue_put' );
packet_queue_put(audioq, packet);
end
else
begin
av_free_packet(packet);
end;
-
+
// Free the packet that was allocated by av_read_frame
SDL_PollEvent(@event);
@@ -665,12 +710,14 @@ begin
*)
end;
-
+
+// halt(0);
+
// Close the codec
- avcodec_close(aCodecCtx);
+// avcodec_close(aCodecCtx);
// Close the video file
- av_close_input_file(pFormatCtx);
+// av_close_input_file(pFormatCtx);
(*
try
@@ -698,7 +745,11 @@ end;
procedure packet_queue_init(var aPacketQueue : TPacketQueue );
begin
- memset(@aPacketQueue, 0, sizeof(TPacketQueue));
+ {$ifdef win32}
+ FillChar(aPacketQueue, sizeof(TPacketQueue), #0);
+ {$else}
+ memset(@aPacketQueue, 0, sizeof(TPacketQueue));
+ {$endif}
aPacketQueue.mutex := SDL_CreateMutex();
aPacketQueue.cond := SDL_CreateCond();
@@ -710,7 +761,7 @@ var
begin
result := -1;
- writeln( 'TAudio_ffMpeg.packet_queue_put' );
+// writeln( 'TAudio_ffMpeg.packet_queue_put' );
if av_dup_packet(@AVPacket) < 0 then
exit;
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-08 12:10:38 +0000