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-rw-r--r--src/media/UAudioDecoder_FFmpeg.pas544
1 files changed, 272 insertions, 272 deletions
diff --git a/src/media/UAudioDecoder_FFmpeg.pas b/src/media/UAudioDecoder_FFmpeg.pas
index f7f9c661..2badb84d 100644
--- a/src/media/UAudioDecoder_FFmpeg.pas
+++ b/src/media/UAudioDecoder_FFmpeg.pas
@@ -86,60 +86,60 @@ const
type
TFFmpegDecodeStream = class(TAudioDecodeStream)
private
- StateLock: PSDL_Mutex;
+ fStateLock: PSDL_Mutex;
- EOFState: boolean; // end-of-stream flag (locked by StateLock)
- ErrorState: boolean; // error flag (locked by StateLock)
+ fEOFState: boolean; // end-of-stream flag (locked by StateLock)
+ fErrorState: boolean; // error flag (locked by StateLock)
- QuitRequest: boolean; // (locked by StateLock)
- ParserIdleCond: PSDL_Cond;
+ fQuitRequest: boolean; // (locked by StateLock)
+ fParserIdleCond: PSDL_Cond;
// parser pause/resume data
- ParserLocked: boolean;
- ParserPauseRequestCount: integer;
- ParserUnlockedCond: PSDL_Cond;
- ParserResumeCond: PSDL_Cond;
-
- SeekRequest: boolean; // (locked by StateLock)
- SeekFlags: integer; // (locked by StateLock)
- SeekPos: double; // stream position to seek for (in secs) (locked by StateLock)
- SeekFlush: boolean; // true if the buffers should be flushed after seeking (locked by StateLock)
+ fParserLocked: boolean;
+ fParserPauseRequestCount: integer;
+ fParserUnlockedCond: PSDL_Cond;
+ fParserResumeCond: PSDL_Cond;
+
+ fSeekRequest: boolean; // (locked by StateLock)
+ fSeekFlags: integer; // (locked by StateLock)
+ fSeekPos: double; // stream position to seek for (in secs) (locked by StateLock)
+ fSeekFlush: boolean; // true if the buffers should be flushed after seeking (locked by StateLock)
SeekFinishedCond: PSDL_Cond;
- Loop: boolean; // (locked by StateLock)
+ fLoop: boolean; // (locked by StateLock)
- ParseThread: PSDL_Thread;
- PacketQueue: TPacketQueue;
+ fParseThread: PSDL_Thread;
+ fPacketQueue: TPacketQueue;
- FormatInfo: TAudioFormatInfo;
+ fFormatInfo: TAudioFormatInfo;
// FFmpeg specific data
- FormatCtx: PAVFormatContext;
- CodecCtx: PAVCodecContext;
- Codec: PAVCodec;
+ fFormatCtx: PAVFormatContext;
+ fCodecCtx: PAVCodecContext;
+ fCodec: PAVCodec;
- AudioStreamIndex: integer;
- AudioStream: PAVStream;
- AudioStreamPos: double; // stream position in seconds (locked by DecoderLock)
+ fAudioStreamIndex: integer;
+ fAudioStream: PAVStream;
+ fAudioStreamPos: double; // stream position in seconds (locked by DecoderLock)
// decoder pause/resume data
- DecoderLocked: boolean;
- DecoderPauseRequestCount: integer;
- DecoderUnlockedCond: PSDL_Cond;
- DecoderResumeCond: PSDL_Cond;
+ fDecoderLocked: boolean;
+ fDecoderPauseRequestCount: integer;
+ fDecoderUnlockedCond: PSDL_Cond;
+ fDecoderResumeCond: PSDL_Cond;
// state-vars for DecodeFrame (locked by DecoderLock)
- AudioPaket: TAVPacket;
- AudioPaketData: PByteArray;
- AudioPaketSize: integer;
- AudioPaketSilence: integer; // number of bytes of silence to return
+ fAudioPaket: TAVPacket;
+ fAudioPaketData: PByteArray;
+ fAudioPaketSize: integer;
+ fAudioPaketSilence: integer; // number of bytes of silence to return
// state-vars for AudioCallback (locked by DecoderLock)
- AudioBufferPos: integer;
- AudioBufferSize: integer;
- AudioBuffer: PByteArray;
+ fAudioBufferPos: integer;
+ fAudioBufferSize: integer;
+ fAudioBuffer: PByteArray;
- Filename: IPath;
+ fFilename: IPath;
procedure SetPositionIntern(Time: real; Flush: boolean; Blocking: boolean);
procedure SetEOF(State: boolean); {$IFDEF HasInline}inline;{$ENDIF}
@@ -199,13 +199,13 @@ constructor TFFmpegDecodeStream.Create();
begin
inherited Create();
- StateLock := SDL_CreateMutex();
- ParserUnlockedCond := SDL_CreateCond();
- ParserResumeCond := SDL_CreateCond();
- ParserIdleCond := SDL_CreateCond();
+ fStateLock := SDL_CreateMutex();
+ fParserUnlockedCond := SDL_CreateCond();
+ fParserResumeCond := SDL_CreateCond();
+ fParserIdleCond := SDL_CreateCond();
SeekFinishedCond := SDL_CreateCond();
- DecoderUnlockedCond := SDL_CreateCond();
- DecoderResumeCond := SDL_CreateCond();
+ fDecoderUnlockedCond := SDL_CreateCond();
+ fDecoderResumeCond := SDL_CreateCond();
// according to the documentation of avcodec_decode_audio(2), sample-data
// should be aligned on a 16 byte boundary. Otherwise internal calls
@@ -222,33 +222,33 @@ begin
// AudioBuffer was not aligned to a 16 byte boundary. The {$ALIGN x} directive
// was not applicable as Delphi in contrast to FPC provides at most 8 byte
// alignment ({$ALIGN 16} is not supported) by this directive.
- AudioBuffer := GetAlignedMem(AUDIO_BUFFER_SIZE, 16);
+ fAudioBuffer := GetAlignedMem(AUDIO_BUFFER_SIZE, 16);
Reset();
end;
procedure TFFmpegDecodeStream.Reset();
begin
- ParseThread := nil;
+ fParseThread := nil;
- EOFState := false;
- ErrorState := false;
- Loop := false;
- QuitRequest := false;
+ fEOFState := false;
+ fErrorState := false;
+ fLoop := false;
+ fQuitRequest := false;
- AudioPaketData := nil;
- AudioPaketSize := 0;
- AudioPaketSilence := 0;
+ fAudioPaketData := nil;
+ fAudioPaketSize := 0;
+ fAudioPaketSilence := 0;
- AudioBufferPos := 0;
- AudioBufferSize := 0;
+ fAudioBufferPos := 0;
+ fAudioBufferSize := 0;
- ParserLocked := false;
- ParserPauseRequestCount := 0;
- DecoderLocked := false;
- DecoderPauseRequestCount := 0;
+ fParserLocked := false;
+ fParserPauseRequestCount := 0;
+ fDecoderLocked := false;
+ fDecoderPauseRequestCount := 0;
- FillChar(AudioPaket, SizeOf(TAVPacket), 0);
+ FillChar(fAudioPaket, SizeOf(TAVPacket), 0);
end;
{*
@@ -258,15 +258,15 @@ destructor TFFmpegDecodeStream.Destroy();
begin
Close();
- SDL_DestroyMutex(StateLock);
- SDL_DestroyCond(ParserUnlockedCond);
- SDL_DestroyCond(ParserResumeCond);
- SDL_DestroyCond(ParserIdleCond);
+ SDL_DestroyMutex(fStateLock);
+ SDL_DestroyCond(fParserUnlockedCond);
+ SDL_DestroyCond(fParserResumeCond);
+ SDL_DestroyCond(fParserIdleCond);
SDL_DestroyCond(SeekFinishedCond);
- SDL_DestroyCond(DecoderUnlockedCond);
- SDL_DestroyCond(DecoderResumeCond);
+ SDL_DestroyCond(fDecoderUnlockedCond);
+ SDL_DestroyCond(fDecoderResumeCond);
- FreeAlignedMem(AudioBuffer);
+ FreeAlignedMem(fAudioBuffer);
inherited;
end;
@@ -287,20 +287,20 @@ begin
Exit;
end;
- Self.Filename := Filename;
+ Self.fFilename := Filename;
// use custom 'ufile' protocol for UTF-8 support
- if (av_open_input_file(FormatCtx, PAnsiChar('ufile:'+FileName.ToUTF8), nil, 0, nil) <> 0) then
+ if (av_open_input_file(fFormatCtx, PAnsiChar('ufile:'+FileName.ToUTF8), nil, 0, nil) <> 0) then
begin
Log.LogError('av_open_input_file failed: "' + Filename.ToNative + '"', 'UAudio_FFmpeg');
Exit;
end;
// generate PTS values if they do not exist
- FormatCtx^.flags := FormatCtx^.flags or AVFMT_FLAG_GENPTS;
+ fFormatCtx^.flags := fFormatCtx^.flags or AVFMT_FLAG_GENPTS;
// retrieve stream information
- if (av_find_stream_info(FormatCtx) < 0) then
+ if (av_find_stream_info(fFormatCtx) < 0) then
begin
Log.LogError('av_find_stream_info failed: "' + Filename.ToNative + '"', 'UAudio_FFmpeg');
Close();
@@ -308,14 +308,14 @@ begin
end;
// FIXME: hack used by ffplay. Maybe should not use url_feof() to test for the end
- FormatCtx^.pb.eof_reached := 0;
+ fFormatCtx^.pb.eof_reached := 0;
{$IFDEF DebugFFmpegDecode}
- dump_format(FormatCtx, 0, PAnsiChar(Filename.ToNative), 0);
+ dump_format(fFormatCtx, 0, PAnsiChar(Filename.ToNative), 0);
{$ENDIF}
- AudioStreamIndex := FFmpegCore.FindAudioStreamIndex(FormatCtx);
- if (AudioStreamIndex < 0) then
+ fAudioStreamIndex := FFmpegCore.FindAudioStreamIndex(fFormatCtx);
+ if (fAudioStreamIndex < 0) then
begin
Log.LogError('FindAudioStreamIndex: No Audio-stream found "' + Filename.ToNative + '"', 'UAudio_FFmpeg');
Close();
@@ -324,9 +324,9 @@ begin
//Log.LogStatus('AudioStreamIndex is: '+ inttostr(ffmpegStreamID), 'UAudio_FFmpeg');
- AudioStream := FormatCtx.streams[AudioStreamIndex];
- AudioStreamPos := 0;
- CodecCtx := AudioStream^.codec;
+ fAudioStream := fFormatCtx.streams[fAudioStreamIndex];
+ fAudioStreamPos := 0;
+ fCodecCtx := fAudioStream^.codec;
// TODO: should we use this or not? Should we allow 5.1 channel audio?
(*
@@ -338,21 +338,21 @@ begin
{$IFEND}
*)
- Codec := avcodec_find_decoder(CodecCtx^.codec_id);
- if (Codec = nil) then
+ fCodec := avcodec_find_decoder(fCodecCtx^.codec_id);
+ if (fCodec = nil) then
begin
Log.LogError('Unsupported codec!', 'UAudio_FFmpeg');
- CodecCtx := nil;
+ fCodecCtx := nil;
Close();
Exit;
end;
// set debug options
- CodecCtx^.debug_mv := 0;
- CodecCtx^.debug := 0;
+ fCodecCtx^.debug_mv := 0;
+ fCodecCtx^.debug := 0;
// detect bug-workarounds automatically
- CodecCtx^.workaround_bugs := FF_BUG_AUTODETECT;
+ fCodecCtx^.workaround_bugs := FF_BUG_AUTODETECT;
// error resilience strategy (careful/compliant/agressive/very_aggressive)
//CodecCtx^.error_resilience := FF_ER_CAREFUL; //FF_ER_COMPLIANT;
// allow non spec compliant speedup tricks.
@@ -362,7 +362,7 @@ begin
// fail if called concurrently by different threads.
FFmpegCore.LockAVCodec();
try
- AVResult := avcodec_open(CodecCtx, Codec);
+ AVResult := avcodec_open(fCodecCtx, fCodec);
finally
FFmpegCore.UnlockAVCodec();
end;
@@ -375,23 +375,23 @@ begin
// now initialize the audio-format
- if (not FFmpegCore.ConvertFFmpegToAudioFormat(CodecCtx^.sample_fmt, SampleFormat)) then
+ if (not FFmpegCore.ConvertFFmpegToAudioFormat(fCodecCtx^.sample_fmt, SampleFormat)) then
begin
// try standard format
SampleFormat := asfS16;
end;
- if CodecCtx^.channels > 255 then
+ if fCodecCtx^.channels > 255 then
Log.LogStatus('Error: CodecCtx^.channels > 255', 'TFFmpegDecodeStream.Open');
- FormatInfo := TAudioFormatInfo.Create(
- byte(CodecCtx^.channels),
- CodecCtx^.sample_rate,
+ fFormatInfo := TAudioFormatInfo.Create(
+ byte(fCodecCtx^.channels),
+ fCodecCtx^.sample_rate,
SampleFormat
);
- PacketQueue := TPacketQueue.Create();
+ fPacketQueue := TPacketQueue.Create();
// finally start the decode thread
- ParseThread := SDL_CreateThread(@ParseThreadMain, Self);
+ fParseThread := SDL_CreateThread(@ParseThreadMain, Self);
Result := true;
end;
@@ -403,47 +403,47 @@ begin
// wake threads waiting for packet-queue data
// Note: normally, there are no waiting threads. If there were waiting
// ones, they would block the audio-callback thread.
- if (assigned(PacketQueue)) then
- PacketQueue.Abort();
+ if (assigned(fPacketQueue)) then
+ fPacketQueue.Abort();
// send quit request (to parse-thread etc)
- SDL_mutexP(StateLock);
- QuitRequest := true;
- SDL_CondBroadcast(ParserIdleCond);
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ fQuitRequest := true;
+ SDL_CondBroadcast(fParserIdleCond);
+ SDL_mutexV(fStateLock);
// abort parse-thread
- if (ParseThread <> nil) then
+ if (fParseThread <> nil) then
begin
// and wait until it terminates
- SDL_WaitThread(ParseThread, ThreadResult);
- ParseThread := nil;
+ SDL_WaitThread(fParseThread, ThreadResult);
+ fParseThread := nil;
end;
// Close the codec
- if (CodecCtx <> nil) then
+ if (fCodecCtx <> nil) then
begin
// avcodec_close() is not thread-safe
FFmpegCore.LockAVCodec();
try
- avcodec_close(CodecCtx);
+ avcodec_close(fCodecCtx);
finally
FFmpegCore.UnlockAVCodec();
end;
- CodecCtx := nil;
+ fCodecCtx := nil;
end;
// Close the video file
- if (FormatCtx <> nil) then
+ if (fFormatCtx <> nil) then
begin
- av_close_input_file(FormatCtx);
- FormatCtx := nil;
+ av_close_input_file(fFormatCtx);
+ fFormatCtx := nil;
end;
PerformOnClose();
- FreeAndNil(PacketQueue);
- FreeAndNil(FormatInfo);
+ FreeAndNil(fPacketQueue);
+ FreeAndNil(fFormatInfo);
end;
function TFFmpegDecodeStream.GetLength(): real;
@@ -451,54 +451,54 @@ begin
// do not forget to consider the start_time value here
// there is a type size mismatch warnign because start_time and duration are cint64.
// So, in principle there could be an overflow when doing the sum.
- Result := (FormatCtx^.start_time + FormatCtx^.duration) / AV_TIME_BASE;
+ Result := (fFormatCtx^.start_time + fFormatCtx^.duration) / AV_TIME_BASE;
end;
function TFFmpegDecodeStream.GetAudioFormatInfo(): TAudioFormatInfo;
begin
- Result := FormatInfo;
+ Result := fFormatInfo;
end;
function TFFmpegDecodeStream.IsEOF(): boolean;
begin
- SDL_mutexP(StateLock);
- Result := EOFState;
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ Result := fEOFState;
+ SDL_mutexV(fStateLock);
end;
procedure TFFmpegDecodeStream.SetEOF(State: boolean);
begin
- SDL_mutexP(StateLock);
- EOFState := State;
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ fEOFState := State;
+ SDL_mutexV(fStateLock);
end;
function TFFmpegDecodeStream.IsError(): boolean;
begin
- SDL_mutexP(StateLock);
- Result := ErrorState;
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ Result := fErrorState;
+ SDL_mutexV(fStateLock);
end;
procedure TFFmpegDecodeStream.SetError(State: boolean);
begin
- SDL_mutexP(StateLock);
- ErrorState := State;
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ fErrorState := State;
+ SDL_mutexV(fStateLock);
end;
function TFFmpegDecodeStream.IsSeeking(): boolean;
begin
- SDL_mutexP(StateLock);
- Result := SeekRequest;
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ Result := fSeekRequest;
+ SDL_mutexV(fStateLock);
end;
function TFFmpegDecodeStream.IsQuit(): boolean;
begin
- SDL_mutexP(StateLock);
- Result := QuitRequest;
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ Result := fQuitRequest;
+ SDL_mutexV(fStateLock);
end;
function TFFmpegDecodeStream.GetPosition(): real;
@@ -509,11 +509,11 @@ begin
// ReadData() does not return all of the buffer retrieved by DecodeFrame().
// Determine the size of the unused part of the decode-buffer.
- BufferSizeSec := (AudioBufferSize - AudioBufferPos) /
- FormatInfo.BytesPerSec;
+ BufferSizeSec := (fAudioBufferSize - fAudioBufferPos) /
+ fFormatInfo.BytesPerSec;
// subtract the size of unused buffer-data from the audio clock.
- Result := AudioStreamPos - BufferSizeSec;
+ Result := fAudioStreamPos - BufferSizeSec;
ResumeDecoder();
end;
@@ -525,16 +525,16 @@ end;
function TFFmpegDecodeStream.GetLoop(): boolean;
begin
- SDL_mutexP(StateLock);
- Result := Loop;
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ Result := fLoop;
+ SDL_mutexV(fStateLock);
end;
procedure TFFmpegDecodeStream.SetLoop(Enabled: boolean);
begin
- SDL_mutexP(StateLock);
- Loop := Enabled;
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ fLoop := Enabled;
+ SDL_mutexV(fStateLock);
end;
@@ -544,25 +544,25 @@ end;
procedure TFFmpegDecodeStream.PauseParser();
begin
- if (SDL_ThreadID() = ParseThread.threadid) then
+ if (SDL_ThreadID() = fParseThread.threadid) then
Exit;
- SDL_mutexP(StateLock);
- Inc(ParserPauseRequestCount);
- while (ParserLocked) do
- SDL_CondWait(ParserUnlockedCond, StateLock);
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ Inc(fParserPauseRequestCount);
+ while (fParserLocked) do
+ SDL_CondWait(fParserUnlockedCond, fStateLock);
+ SDL_mutexV(fStateLock);
end;
procedure TFFmpegDecodeStream.ResumeParser();
begin
- if (SDL_ThreadID() = ParseThread.threadid) then
+ if (SDL_ThreadID() = fParseThread.threadid) then
Exit;
- SDL_mutexP(StateLock);
- Dec(ParserPauseRequestCount);
- SDL_CondSignal(ParserResumeCond);
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ Dec(fParserPauseRequestCount);
+ SDL_CondSignal(fParserResumeCond);
+ SDL_mutexV(fStateLock);
end;
procedure TFFmpegDecodeStream.SetPositionIntern(Time: real; Flush: boolean; Blocking: boolean);
@@ -575,36 +575,36 @@ begin
// - Last lock the state lock because we are manipulating some shared state-vars.
PauseParser();
PauseDecoder();
- SDL_mutexP(StateLock);
+ SDL_mutexP(fStateLock);
try
- EOFState := false;
- ErrorState := false;
+ fEOFState := false;
+ fErrorState := false;
// do not seek if we are already at the correct position.
// This is important especially for seeking to position 0 if we already are
// at the beginning. Although seeking with AVSEEK_FLAG_BACKWARD for pos 0 works,
// it is still a bit choppy (although much better than w/o AVSEEK_FLAG_BACKWARD).
- if (Time = AudioStreamPos) then
+ if (Time = fAudioStreamPos) then
Exit;
// configure seek parameters
- SeekPos := Time;
- SeekFlush := Flush;
- SeekFlags := AVSEEK_FLAG_ANY;
- SeekRequest := true;
+ fSeekPos := Time;
+ fSeekFlush := Flush;
+ fSeekFlags := AVSEEK_FLAG_ANY;
+ fSeekRequest := true;
// Note: the BACKWARD-flag seeks to the first position <= the position
// searched for. Otherwise e.g. position 0 might not be seeked correct.
// For some reason ffmpeg sometimes doesn't use position 0 but the key-frame
// following. In streams with few key-frames (like many flv-files) the next
// key-frame after 0 might be 5secs ahead.
- if (Time <= AudioStreamPos) then
- SeekFlags := SeekFlags or AVSEEK_FLAG_BACKWARD;
+ if (Time <= fAudioStreamPos) then
+ fSeekFlags := fSeekFlags or AVSEEK_FLAG_BACKWARD;
// send a reuse signal in case the parser was stopped (e.g. because of an EOF)
- SDL_CondSignal(ParserIdleCond);
+ SDL_CondSignal(fParserIdleCond);
finally
- SDL_mutexV(StateLock);
+ SDL_mutexV(fStateLock);
ResumeDecoder();
ResumeParser();
end;
@@ -612,10 +612,10 @@ begin
// in blocking mode, wait until seeking is done
if (Blocking) then
begin
- SDL_mutexP(StateLock);
- while (SeekRequest) do
- SDL_CondWait(SeekFinishedCond, StateLock);
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ while (fSeekRequest) do
+ SDL_CondWait(SeekFinishedCond, fStateLock);
+ SDL_mutexV(fStateLock);
end;
end;
@@ -635,10 +635,10 @@ begin
while (ParseLoop()) do
begin
// wait for reuse or destruction of stream
- SDL_mutexP(StateLock);
- while (not (SeekRequest or QuitRequest)) do
- SDL_CondWait(ParserIdleCond, StateLock);
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ while (not (fSeekRequest or fQuitRequest)) do
+ SDL_CondWait(fParserIdleCond, fStateLock);
+ SDL_mutexV(fStateLock);
end;
end;
@@ -669,19 +669,19 @@ var
// instead and give priority to the threads requesting the parser to pause.
procedure LockParser();
begin
- SDL_mutexP(StateLock);
- while (ParserPauseRequestCount > 0) do
- SDL_CondWait(ParserResumeCond, StateLock);
- ParserLocked := true;
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ while (fParserPauseRequestCount > 0) do
+ SDL_CondWait(fParserResumeCond, fStateLock);
+ fParserLocked := true;
+ SDL_mutexV(fStateLock);
end;
procedure UnlockParser();
begin
- SDL_mutexP(StateLock);
- ParserLocked := false;
- SDL_CondBroadcast(ParserUnlockedCond);
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ fParserLocked := false;
+ SDL_CondBroadcast(fParserUnlockedCond);
+ SDL_mutexV(fStateLock);
end;
begin
@@ -699,92 +699,92 @@ begin
end;
// handle seek-request (Note: no need to lock SeekRequest here)
- if (SeekRequest) then
+ if (fSeekRequest) then
begin
// first try: seek on the audio stream
- SeekTarget := Round(SeekPos / av_q2d(AudioStream^.time_base));
+ SeekTarget := Round(fSeekPos / av_q2d(fAudioStream^.time_base));
StartSilence := 0;
- if (SeekTarget < AudioStream^.start_time) then
- StartSilence := (AudioStream^.start_time - SeekTarget) * av_q2d(AudioStream^.time_base);
- ErrorCode := av_seek_frame(FormatCtx, AudioStreamIndex, SeekTarget, SeekFlags);
+ if (SeekTarget < fAudioStream^.start_time) then
+ StartSilence := (fAudioStream^.start_time - SeekTarget) * av_q2d(fAudioStream^.time_base);
+ ErrorCode := av_seek_frame(fFormatCtx, fAudioStreamIndex, SeekTarget, fSeekFlags);
if (ErrorCode < 0) then
begin
// second try: seek on the default stream (necessary for flv-videos and some ogg-files)
- SeekTarget := Round(SeekPos * AV_TIME_BASE);
+ SeekTarget := Round(fSeekPos * AV_TIME_BASE);
StartSilence := 0;
- if (SeekTarget < FormatCtx^.start_time) then
- StartSilence := (FormatCtx^.start_time - SeekTarget) / AV_TIME_BASE;
- ErrorCode := av_seek_frame(FormatCtx, -1, SeekTarget, SeekFlags);
+ if (SeekTarget < fFormatCtx^.start_time) then
+ StartSilence := (fFormatCtx^.start_time - SeekTarget) / AV_TIME_BASE;
+ ErrorCode := av_seek_frame(fFormatCtx, -1, SeekTarget, fSeekFlags);
end;
// pause decoder and lock state (keep the lock-order to avoid deadlocks).
// Note that the decoder does not block in the packet-queue in seeking state,
// so locking the decoder here does not cause a dead-lock.
PauseDecoder();
- SDL_mutexP(StateLock);
+ SDL_mutexP(fStateLock);
try
if (ErrorCode < 0) then
begin
// seeking failed
- ErrorState := true;
- Log.LogStatus('Seek Error in "'+FormatCtx^.filename+'"', 'UAudioDecoder_FFmpeg');
+ fErrorState := true;
+ Log.LogStatus('Seek Error in "'+fFormatCtx^.filename+'"', 'UAudioDecoder_FFmpeg');
end
else
begin
- if (SeekFlush) then
+ if (fSeekFlush) then
begin
// flush queue (we will send a Flush-Packet when seeking is finished)
- PacketQueue.Flush();
+ fPacketQueue.Flush();
// flush the decode buffers
- AudioBufferSize := 0;
- AudioBufferPos := 0;
- AudioPaketSize := 0;
- AudioPaketSilence := 0;
+ fAudioBufferSize := 0;
+ fAudioBufferPos := 0;
+ fAudioPaketSize := 0;
+ fAudioPaketSilence := 0;
FlushCodecBuffers();
// Set preliminary stream position. The position will be set to
// the correct value as soon as the first packet is decoded.
- AudioStreamPos := SeekPos;
+ fAudioStreamPos := fSeekPos;
end
else
begin
// request avcodec buffer flush
- PacketQueue.PutStatus(PKT_STATUS_FLAG_FLUSH, nil);
+ fPacketQueue.PutStatus(PKT_STATUS_FLAG_FLUSH, nil);
end;
// fill the gap between position 0 and start_time with silence
// but not if we are in loop mode
- if ((StartSilence > 0) and (not Loop)) then
+ if ((StartSilence > 0) and (not fLoop)) then
begin
GetMem(StartSilencePtr, SizeOf(StartSilence));
StartSilencePtr^ := StartSilence;
- PacketQueue.PutStatus(PKT_STATUS_FLAG_EMPTY, StartSilencePtr);
+ fPacketQueue.PutStatus(PKT_STATUS_FLAG_EMPTY, StartSilencePtr);
end;
end;
- SeekRequest := false;
+ fSeekRequest := false;
SDL_CondBroadcast(SeekFinishedCond);
finally
- SDL_mutexV(StateLock);
+ SDL_mutexV(fStateLock);
ResumeDecoder();
end;
end;
- if (PacketQueue.GetSize() > MAX_AUDIOQ_SIZE) then
+ if (fPacketQueue.GetSize() > MAX_AUDIOQ_SIZE) then
begin
SDL_Delay(10);
Continue;
end;
- if (av_read_frame(FormatCtx, Packet) < 0) then
+ if (av_read_frame(fFormatCtx, Packet) < 0) then
begin
// failed to read a frame, check reason
{$IF (LIBAVFORMAT_VERSION_MAJOR >= 52)}
- ByteIOCtx := FormatCtx^.pb;
+ ByteIOCtx := fFormatCtx^.pb;
{$ELSE}
- ByteIOCtx := @FormatCtx^.pb;
+ ByteIOCtx := @fFormatCtx^.pb;
{$IFEND}
// check for end-of-file (eof is not an error)
@@ -799,7 +799,7 @@ begin
else
begin
// signal end-of-file
- PacketQueue.PutStatus(PKT_STATUS_FLAG_EOF, nil);
+ fPacketQueue.PutStatus(PKT_STATUS_FLAG_EOF, nil);
Exit;
end;
end;
@@ -808,26 +808,26 @@ begin
if (url_ferror(ByteIOCtx) <> 0) then
begin
// an error occured -> abort and wait for repositioning or termination
- PacketQueue.PutStatus(PKT_STATUS_FLAG_ERROR, nil);
+ fPacketQueue.PutStatus(PKT_STATUS_FLAG_ERROR, nil);
Exit;
end;
// url_feof() does not detect an EOF for some files
// so we have to do it this way.
- if ((FormatCtx^.file_size <> 0) and
- (ByteIOCtx^.pos >= FormatCtx^.file_size)) then
+ if ((fFormatCtx^.file_size <> 0) and
+ (ByteIOCtx^.pos >= fFormatCtx^.file_size)) then
begin
- PacketQueue.PutStatus(PKT_STATUS_FLAG_EOF, nil);
+ fPacketQueue.PutStatus(PKT_STATUS_FLAG_EOF, nil);
Exit;
end;
// unknown error occured, exit
- PacketQueue.PutStatus(PKT_STATUS_FLAG_ERROR, nil);
+ fPacketQueue.PutStatus(PKT_STATUS_FLAG_ERROR, nil);
Exit;
end;
- if (Packet.stream_index = AudioStreamIndex) then
- PacketQueue.Put(@Packet)
+ if (Packet.stream_index = fAudioStreamIndex) then
+ fPacketQueue.Put(@Packet)
else
av_free_packet(@Packet);
@@ -844,28 +844,28 @@ end;
procedure TFFmpegDecodeStream.PauseDecoder();
begin
- SDL_mutexP(StateLock);
- Inc(DecoderPauseRequestCount);
- while (DecoderLocked) do
- SDL_CondWait(DecoderUnlockedCond, StateLock);
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ Inc(fDecoderPauseRequestCount);
+ while (fDecoderLocked) do
+ SDL_CondWait(fDecoderUnlockedCond, fStateLock);
+ SDL_mutexV(fStateLock);
end;
procedure TFFmpegDecodeStream.ResumeDecoder();
begin
- SDL_mutexP(StateLock);
- Dec(DecoderPauseRequestCount);
- SDL_CondSignal(DecoderResumeCond);
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ Dec(fDecoderPauseRequestCount);
+ SDL_CondSignal(fDecoderResumeCond);
+ SDL_mutexV(fStateLock);
end;
procedure TFFmpegDecodeStream.FlushCodecBuffers();
begin
// if no flush operation is specified, avcodec_flush_buffers will not do anything.
- if (@CodecCtx.codec.flush <> nil) then
+ if (@fCodecCtx.codec.flush <> nil) then
begin
// flush buffers used by avcodec_decode_audio, etc.
- avcodec_flush_buffers(CodecCtx);
+ avcodec_flush_buffers(fCodecCtx);
end
else
begin
@@ -874,8 +874,8 @@ begin
// We will just reopen the codec.
FFmpegCore.LockAVCodec();
try
- avcodec_close(CodecCtx);
- avcodec_open(CodecCtx, Codec);
+ avcodec_close(fCodecCtx);
+ avcodec_open(fCodecCtx, fCodec);
finally
FFmpegCore.UnlockAVCodec();
end;
@@ -901,27 +901,27 @@ begin
begin
// for titles with start_time > 0 we have to generate silence
// until we reach the pts of the first data packet.
- if (AudioPaketSilence > 0) then
+ if (fAudioPaketSilence > 0) then
begin
- DataSize := Min(AudioPaketSilence, BufferSize);
+ DataSize := Min(fAudioPaketSilence, BufferSize);
FillChar(Buffer[0], DataSize, 0);
- Dec(AudioPaketSilence, DataSize);
- AudioStreamPos := AudioStreamPos + DataSize / FormatInfo.BytesPerSec;
+ Dec(fAudioPaketSilence, DataSize);
+ fAudioStreamPos := fAudioStreamPos + DataSize / fFormatInfo.BytesPerSec;
Result := DataSize;
Exit;
end;
// read packet data
- while (AudioPaketSize > 0) do
+ while (fAudioPaketSize > 0) do
begin
DataSize := BufferSize;
{$IF LIBAVCODEC_VERSION >= 51030000} // 51.30.0
- PaketDecodedSize := avcodec_decode_audio2(CodecCtx, PSmallint(Buffer),
- DataSize, AudioPaketData, AudioPaketSize);
+ PaketDecodedSize := avcodec_decode_audio2(fCodecCtx, PSmallint(Buffer),
+ DataSize, fAudioPaketData, fAudioPaketSize);
{$ELSE}
- PaketDecodedSize := avcodec_decode_audio(CodecCtx, PSmallint(Buffer),
- DataSize, AudioPaketData, AudioPaketSize);
+ PaketDecodedSize := avcodec_decode_audio(fCodecCtx, PSmallint(Buffer),
+ DataSize, fAudioPaketData, fAudioPaketSize);
{$IFEND}
if(PaketDecodedSize < 0) then
@@ -930,19 +930,19 @@ begin
{$IFDEF DebugFFmpegDecode}
DebugWriteln('Skip audio frame');
{$ENDIF}
- AudioPaketSize := 0;
+ fAudioPaketSize := 0;
Break;
end;
- Inc(AudioPaketData, PaketDecodedSize);
- Dec(AudioPaketSize, PaketDecodedSize);
+ Inc(fAudioPaketData, PaketDecodedSize);
+ Dec(fAudioPaketSize, PaketDecodedSize);
// check if avcodec_decode_audio returned data, otherwise fetch more frames
if (DataSize <= 0) then
Continue;
// update stream position by the amount of fetched data
- AudioStreamPos := AudioStreamPos + DataSize / FormatInfo.BytesPerSec;
+ fAudioStreamPos := fAudioStreamPos + DataSize / fFormatInfo.BytesPerSec;
// we have data, return it and come back for more later
Result := DataSize;
@@ -950,8 +950,8 @@ begin
end;
// free old packet data
- if (AudioPaket.data <> nil) then
- av_free_packet(@AudioPaket);
+ if (fAudioPaket.data <> nil) then
+ av_free_packet(@fAudioPaket);
// do not block queue on seeking (to avoid deadlocks on the DecoderLock)
if (IsSeeking()) then
@@ -961,17 +961,17 @@ begin
// request a new packet and block if none available.
// If this fails, the queue was aborted.
- if (PacketQueue.Get(AudioPaket, BlockQueue) <= 0) then
+ if (fPacketQueue.Get(fAudioPaket, BlockQueue) <= 0) then
Exit;
// handle Status-packet
- if (PAnsiChar(AudioPaket.data) = STATUS_PACKET) then
+ if (PAnsiChar(fAudioPaket.data) = STATUS_PACKET) then
begin
- AudioPaket.data := nil;
- AudioPaketData := nil;
- AudioPaketSize := 0;
+ fAudioPaket.data := nil;
+ fAudioPaketData := nil;
+ fAudioPaketSize := 0;
- case (AudioPaket.flags) of
+ case (fAudioPaket.flags) of
PKT_STATUS_FLAG_FLUSH:
begin
// just used if SetPositionIntern was called without the flush flag.
@@ -993,9 +993,9 @@ begin
end;
PKT_STATUS_FLAG_EMPTY:
begin
- SilenceDuration := PDouble(PacketQueue.GetStatusInfo(AudioPaket))^;
- AudioPaketSilence := Round(SilenceDuration * FormatInfo.SampleRate) * FormatInfo.FrameSize;
- PacketQueue.FreeStatusInfo(AudioPaket);
+ SilenceDuration := PDouble(fPacketQueue.GetStatusInfo(fAudioPaket))^;
+ fAudioPaketSilence := Round(SilenceDuration * fFormatInfo.SampleRate) * fFormatInfo.FrameSize;
+ fPacketQueue.FreeStatusInfo(fAudioPaket);
end
else
begin
@@ -1006,20 +1006,20 @@ begin
Continue;
end;
- AudioPaketData := AudioPaket.data;
- AudioPaketSize := AudioPaket.size;
+ fAudioPaketData := fAudioPaket.data;
+ fAudioPaketSize := fAudioPaket.size;
// if available, update the stream position to the presentation time of this package
- if(AudioPaket.pts <> AV_NOPTS_VALUE) then
+ if(fAudioPaket.pts <> AV_NOPTS_VALUE) then
begin
{$IFDEF DebugFFmpegDecode}
- TmpPos := AudioStreamPos;
+ TmpPos := fAudioStreamPos;
{$ENDIF}
- AudioStreamPos := av_q2d(AudioStream^.time_base) * AudioPaket.pts;
+ fAudioStreamPos := av_q2d(fAudioStream^.time_base) * fAudioPaket.pts;
{$IFDEF DebugFFmpegDecode}
- DebugWriteln('Timestamp: ' + floattostrf(AudioStreamPos, ffFixed, 15, 3) + ' ' +
+ DebugWriteln('Timestamp: ' + floattostrf(fAudioStreamPos, ffFixed, 15, 3) + ' ' +
'(Calc: ' + floattostrf(TmpPos, ffFixed, 15, 3) + '), ' +
- 'Diff: ' + floattostrf(AudioStreamPos-TmpPos, ffFixed, 15, 3));
+ 'Diff: ' + floattostrf(fAudioStreamPos-TmpPos, ffFixed, 15, 3));
{$ENDIF}
end;
end;
@@ -1034,19 +1034,19 @@ var
// prioritize pause requests
procedure LockDecoder();
begin
- SDL_mutexP(StateLock);
- while (DecoderPauseRequestCount > 0) do
- SDL_CondWait(DecoderResumeCond, StateLock);
- DecoderLocked := true;
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ while (fDecoderPauseRequestCount > 0) do
+ SDL_CondWait(fDecoderResumeCond, fStateLock);
+ fDecoderLocked := true;
+ SDL_mutexV(fStateLock);
end;
procedure UnlockDecoder();
begin
- SDL_mutexP(StateLock);
- DecoderLocked := false;
- SDL_CondBroadcast(DecoderUnlockedCond);
- SDL_mutexV(StateLock);
+ SDL_mutexP(fStateLock);
+ fDecoderLocked := false;
+ SDL_CondBroadcast(fDecoderUnlockedCond);
+ SDL_mutexV(fStateLock);
end;
begin
@@ -1065,15 +1065,15 @@ begin
while (BufferPos < BufferSize) do
begin
// check if we need more data
- if (AudioBufferPos >= AudioBufferSize) then
+ if (fAudioBufferPos >= fAudioBufferSize) then
begin
- AudioBufferPos := 0;
+ fAudioBufferPos := 0;
// we have already sent all our data; get more
- AudioBufferSize := DecodeFrame(AudioBuffer, AUDIO_BUFFER_SIZE);
+ fAudioBufferSize := DecodeFrame(fAudioBuffer, AUDIO_BUFFER_SIZE);
// check for errors or EOF
- if(AudioBufferSize < 0) then
+ if(fAudioBufferSize < 0) then
begin
Result := BufferPos;
Exit;
@@ -1081,16 +1081,16 @@ begin
end;
// calc number of new bytes in the decode-buffer
- CopyByteCount := AudioBufferSize - AudioBufferPos;
+ CopyByteCount := fAudioBufferSize - fAudioBufferPos;
// resize copy-count if more bytes available than needed (remaining bytes are used the next time)
RemainByteCount := BufferSize - BufferPos;
if (CopyByteCount > RemainByteCount) then
CopyByteCount := RemainByteCount;
- Move(AudioBuffer[AudioBufferPos], Buffer[BufferPos], CopyByteCount);
+ Move(fAudioBuffer[fAudioBufferPos], Buffer[BufferPos], CopyByteCount);
Inc(BufferPos, CopyByteCount);
- Inc(AudioBufferPos, CopyByteCount);
+ Inc(fAudioBufferPos, CopyByteCount);
end;
finally
UnlockDecoder();