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ugwavi.pas
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(******************************************************************************)
(* ugwavi.pas ??.??.???? *)
(* *)
(* Version : 0.01 *)
(* *)
(* Author : Uwe Schächterle (Corpsman) *)
(* *)
(* Support : www.Corpsman.de *)
(* *)
(* Description : Class to create .avi files. Ported from C *)
(* *)
(* License : See the file license.md, located under: *)
(* https://github.com/PascalCorpsman/Software_Licenses/blob/main/license.md *)
(* for details about the license. *)
(* *)
(* It is not allowed to change or remove this text from any *)
(* source file of the project. *)
(* *)
(* Warranty : There is no warranty, neither in correctness of the *)
(* implementation, nor anything other that could happen *)
(* or go wrong, use at your own risk. *)
(* *)
(* Known Issues: none *)
(* *)
(* History : 0.01 - Initial version *)
(* *)
(******************************************************************************)
(*
* Orig Source: https://github.com/rolinh/libgwavi
*
* Orig Authors: 2008-2011, Michael Kohn
* 2013, Robin Hahling
*
* C-Types: https://learn.microsoft.com/en-us/cpp/cpp/data-type-ranges?view=msvc-170
*
* Port to FPC by Corpsman
*)
Unit ugwavi;
{$MODE ObjFPC}{$H+}
Interface
Uses
Classes, SysUtils;
Type
TUintArray = Array Of UInt32;
gwavi_audio_t = Record
Channels: UInt32;
bits: UInt32;
samples_per_second: UInt32;
End;
p_gwavi_audio_t = ^gwavi_audio_t;
gwavi_header_t = Record
time_delay: UInt32; //* dwMicroSecPerFrame */
data_rate: UInt32; //* dwMaxBytesPerSec */
reserved: UInt32;
flags: UInt32; //* dwFlags */
number_of_frames: UInt32; //* dwTotalFrames */
initial_frames: UInt32; //* dwInitialFrames */
data_streams: UInt32; //* dwStreams */
buffer_size: UInt32; //* dwSuggestedBufferSize */
width: UInt32; //* dwWidth */
height: UInt32; //* dwHeight */
time_scale: UInt32;
playback_data_rate: UInt32;
starting_time: UInt32;
data_length: UInt32;
End;
gwavi_stream_header_t = Record
data_type: Array[0..4] Of Char; //* fccType */
codec: Array[0..4] Of Char; //* fccHandler */
flags: UInt32; //* dwFlags */
priority: UInt32;
initial_frames: UInt32; //* dwInitialFrames */
time_scale: UInt32; //* dwScale */
data_rate: UInt32; //* dwRate */
start_time: UInt32; //* dwStart */
data_length: UInt32; //* dwLength */
buffer_size: UInt32; //* dwSuggestedBufferSize */
video_quality: UInt32; //* dwQuality */
(**
* Value between 0-10000. If set to -1, drivers use default quality
* value.
*)
audio_quality: int32;
sample_size: UInt32; //* dwSampleSize */
End;
gwavi_stream_format_v_t = Record
header_size: UInt32;
width: UInt32;
height: UInt32;
num_planes: uint16;
bits_per_pixel: uint16;
compression_type: UInt32;
image_size: UInt32;
x_pels_per_meter: UInt32;
y_pels_per_meter: UInt32;
colors_used: UInt32;
colors_important: UInt32;
palette: Array Of UInt32;
palette_count: UInt32;
End;
gwavi_stream_format_a_t = Record
format_type: uint16;
channels: UInt32;
sample_rate: UInt32;
bytes_per_second: UInt32;
block_align: UInt32;
bits_per_sample: UInt32;
size: uint16;
End;
{ tgwavi }
tgwavi = Class
private
fFile: TFileStream;
favi_header: gwavi_header_t;
fstream_header_v: gwavi_stream_header_t;
fstream_format_v: gwavi_stream_format_v_t;
fstream_header_a: gwavi_stream_header_t;
fstream_format_a: gwavi_stream_format_a_t;
fmarker: int64;
foffsets_ptr: int32;
foffsets_len: int32;
foffsets: TUintArray;
foffset_count: int32;
fLastError: String;
Function write_avi_header_chunk(): integer;
Function write_avi_header(Const avi_header: gwavi_header_t): integer;
Function write_stream_header(Const stream_header: gwavi_stream_header_t): integer;
Function write_stream_format_v(Const stream_format_v: gwavi_stream_format_v_t): integer;
Function write_stream_format_a(Const stream_format_a: gwavi_stream_format_a_t): integer;
public
Property LastError: String read fLastError;
Constructor Create(); virtual;
Destructor Destroy(); override;
(*
* 1. Datei Öffnen
* fourcc = 'MJPG'
*)
Function Open(Const Filename: String; Width, Height: Integer; fourcc: String; fps: integer; audio: p_gwavi_audio_t): Boolean;
(*
* 2. [Optional] Einzelbilder anfügen, Achtung, dass scheint nur mit .jpg Dateien zu gehen ..
*)
Function Add_Frame(Stream: TStream): Boolean;
(*
* 3. [Optional] eine .wav Datei Anfügen, Achtung ungetestet
*)
Function Add_Audio(Stream: TStream): Boolean;
(*
* 4. Datei Schließen und damit gültig "abspeichern"
*)
Function Close(): Boolean;
End;
Implementation
// ----------------------------------------- Helper functions ------------------
Const
(*
* list of fourccs from http://fourcc.org/codecs.php -> Link is dead
*
* here is a other link that holds lots of fourccs
* https://www.libe.net/themen/FourCC-Codec-Codes.php#fourcc-codes
*)
valid_fourcc: Array Of String = (
'3IV1', '3IV2', '8BPS',
'AASC', 'ABYR', 'ADV1', 'ADVJ', 'AEMI', 'AFLC', 'AFLI', 'AJPG', 'AMPG', 'ANIM', 'AP41', 'ASLC',
'ASV1', 'ASV2', 'ASVX', 'AUR2', 'AURA', 'AVC1', 'AVRN',
'BA81', 'BINK', 'BLZ0', 'BT20', 'BTCV', 'BW10', 'BYR1', 'BYR2',
'CC12', 'CDVC', 'CFCC', 'CGDI', 'CHAM', 'CJPG', 'CMYK', 'CPLA', 'CRAM', 'CSCD', 'CTRX', 'CVID',
'CWLT', 'CXY1', 'CXY2', 'CYUV', 'CYUY',
'D261', 'D263', 'DAVC', 'DCL1', 'DCL2', 'DCL3', 'DCL4', 'DCL5', 'DIV3', 'DIV4', 'DIV5', 'DIVX',
'DM4V', 'DMB1', 'DMB2', 'DMK2', 'DSVD', 'DUCK', 'DV25', 'DV50', 'DVAN', 'DVCS', 'DVE2', 'DVH1',
'DVHD', 'DVSD', 'DVSL', 'DVX1', 'DVX2', 'DVX3', 'DX50', 'DXGM', 'DXTC', 'DXTN',
'EKQ0', 'ELK0', 'EM2V', 'ES07', 'ESCP', 'ETV1', 'ETV2', 'ETVC',
'FFV1', 'FLJP', 'FMP4', 'FMVC', 'FPS1', 'FRWA', 'FRWD', 'FVF1',
'GEOX', 'GJPG', 'GLZW', 'GPEG', 'GWLT',
'H260', 'H261', 'H262', 'H263', 'H264', 'H265', 'H266', 'H267', 'H268', 'H269',
'HDYC', 'HFYU', 'HMCR', 'HMRR',
'I263', 'ICLB', 'IGOR', 'IJPG', 'ILVC', 'ILVR', 'IPDV', 'IR21', 'IRAW', 'ISME',
'IV30', 'IV31', 'IV32', 'IV33', 'IV34', 'IV35', 'IV36', 'IV37', 'IV38', 'IV39', 'IV40', 'IV41',
'IV41', 'IV43', 'IV44', 'IV45', 'IV46', 'IV47', 'IV48', 'IV49', 'IV50',
'JBYR', 'JPEG', 'JPGL',
'KMVC',
'L261', 'L263', 'LBYR', 'LCMW', 'LCW2', 'LEAD', 'LGRY', 'LJ11', 'LJ22', 'LJ2K', 'LJ44', 'LJPG',
'LMP2', 'LMP4', 'LSVC', 'LSVM', 'LSVX', 'LZO1',
'M261', 'M263', 'M4CC', 'M4S2', 'MC12', 'MCAM', 'MJ2C', 'MJPG', 'MMES', 'MP2A', 'MP2T', 'MP2V',
'MP42', 'MP43', 'MP4A', 'MP4S', 'MP4T', 'MP4V', 'MPEG', 'MPG4', 'MPGI', 'MR16', 'MRCA', 'MRLE',
'MSVC', 'MSZH',
'MTX1', 'MTX2', 'MTX3', 'MTX4', 'MTX5', 'MTX6', 'MTX7', 'MTX8', 'MTX9',
'MVI1', 'MVI2', 'MWV1',
'NAVI', 'NDSC', 'NDSM', 'NDSP', 'NDSS', 'NDXC', 'NDXH', 'NDXP', 'NDXS', 'NHVU', 'NTN1', 'NTN2',
'NVDS', 'NVHS',
'NVS0', 'NVS1', 'NVS2', 'NVS3', 'NVS4', 'NVS5',
'NVT0', 'NVT1', 'NVT2', 'NVT3', 'NVT4', 'NVT5',
'PDVC', 'PGVV', 'PHMO', 'PIM1', 'PIM2', 'PIMJ', 'PIXL', 'PJPG', 'PVEZ', 'PVMM', 'PVW2',
'QPEG', 'QPEQ',
'RGBT', 'RLE', 'RLE4', 'RLE8', 'RMP4', 'RPZA', 'RT21', 'RV20', 'RV30', 'RV40', 'S422', 'SAN3',
'SDCC', 'SEDG', 'SFMC', 'SMP4', 'SMSC', 'SMSD', 'SMSV', 'SP40', 'SP44', 'SP54', 'SPIG', 'SQZ2',
'STVA', 'STVB', 'STVC', 'STVX', 'STVY', 'SV10', 'SVQ1', 'SVQ3',
'TLMS', 'TLST', 'TM20', 'TM2X', 'TMIC', 'TMOT', 'TR20', 'TSCC', 'TV10', 'TVJP', 'TVMJ', 'TY0N',
'TY2C', 'TY2N',
'UCOD', 'ULTI',
'V210', 'V261', 'V655', 'VCR1', 'VCR2', 'VCR3', 'VCR4', 'VCR5', 'VCR6', 'VCR7', 'VCR8', 'VCR9',
'VDCT', 'VDOM', 'VDTZ', 'VGPX', 'VIDS', 'VIFP', 'VIVO', 'VIXL', 'VLV1', 'VP30', 'VP31', 'VP40',
'VP50', 'VP60', 'VP61', 'VP62', 'VP70', 'VP80', 'VQC1', 'VQC2', 'VQJC', 'VSSV', 'VUUU', 'VX1K',
'VX2K', 'VXSP', 'VYU9', 'VYUY',
'WBVC', 'WHAM', 'WINX', 'WJPG', 'WMV1', 'WMV2', 'WMV3', 'WMVA', 'WNV1', 'WVC1',
'X263', 'X264', 'XLV0', 'XMPG', 'XVID',
'XWV0', 'XWV1', 'XWV2', 'XWV3', 'XWV4', 'XWV5', 'XWV6', 'XWV7', 'XWV8', 'XWV9',
'XXAN',
'Y16', 'Y411', 'Y41P', 'Y444', 'Y8', 'YC12', 'YUV8', 'YUV9', 'YUVP', 'YUY2', 'YUYV', 'YV12', 'YV16',
'YV92',
'ZLIB ZMBV ZPEG ZYGO ZYYY'
);
EOF = -1;
Function write_chars_bin(Const Stream: TStream; Data: String; Len: integer
): Integer;
Var
i: Integer;
c: Char;
Begin
result := -1; // Fehler
For i := 1 To len Do Begin
c := Data[i];
stream.Write(c, sizeof(c));
End;
result := 0;
End;
Function fputc(Value: Integer; Const Stream: TStream): Integer;
Var
b: UInt8;
Begin
result := -1;
b := value And 255;
stream.Write(b, sizeof(b));
result := 0;
End;
Function write_int(Const Stream: TStream; n: uint32): integer;
Var
b: UInt8;
Begin
result := -1;
b := n And $FF;
stream.Write(b, sizeof(b));
b := (n Shr 8) And $FF;
stream.Write(b, sizeof(b));
b := (n Shr 16) And $FF;
stream.Write(b, sizeof(b));
b := (n Shr 24) And $FF;
stream.Write(b, sizeof(b));
result := 0;
End;
Function write_short(Const Stream: TStream; n: uint16): integer;
Var
b: UInt8;
Begin
result := -1;
b := n And $FF;
stream.Write(b, sizeof(b));
b := (n Shr 8) And $FF;
stream.Write(b, sizeof(b));
result := 0;
End;
Function check_fourcc(Const fourcc: String): Boolean;
Var
i: Integer;
Begin
result := false;
For i := 0 To high(valid_fourcc) Do Begin
If fourcc = valid_fourcc[i] Then Begin
result := true;
exit;
End;
End;
End;
Function write_index(Const Stream: TStream; Count: integer; Offsets: TUintArray
): integer;
Var
marker, t: int64;
offset: UInt32;
i: integer;
Begin
result := -1;
offset := 4;
If Not assigned(offsets) Then exit;
// return -1;
If (write_chars_bin(Stream, 'idx1', 4) = -1) Then exit;
// (void)fprintf(stderr, "write_index: write_chars_bin) failed\n");
// return -1;
// }
marker := Stream.Position;
// if ((marker = ftell(Stream)) == -1) {
// perror("write_index (ftell)");
// return -1;
// }
If (write_int(Stream, 0) = -1) Then exit;
// goto write_int_failed;
// for (i = 0; i < count; i++) {
For i := 0 To Count - 1 Do Begin
If ((offsets[i] And $80000000) = 0) Then Begin
write_chars_bin(Stream, '00dc', 4); // TODO: Passt das so ?
End
Else Begin
write_chars_bin(Stream, '01wb', 4);
offsets[i] := offsets[i] And $7FFFFFFF;
End;
If (write_int(Stream, $10) = -1) Then exit;
// goto write_int_failed;
If (write_int(Stream, offset) = -1) Then exit;
// goto write_int_failed;
If (write_int(Stream, offsets[i]) = -1) Then exit;
// goto write_int_failed;
offset := offset + offsets[i] + 8;
End;
t := Stream.Position;
// if ((t = ftell(Stream)) = -1) {
// perror("write_index (ftell)");
// return -1;
// }
Stream.Position := marker;
// if (fseek(Stream, marker, SEEK_SET) = -1) {
// perror("write_index (fseek)");
// return -1;
// }
If (write_int(Stream, (t - marker - 4)) = -1) Then exit;
// goto write_int_failed;
Stream.Position := t;
// if (fseek(Stream, t, SEEK_SET) = -1) {
// perror("write_index (fseek)");
// return -1;
// }
result := 0;
//write_int_failed:
// (void)fprintf(stderr, "write_index: write_int() failed\n");
// return -1;
End;
{ tgwavi }
Constructor tgwavi.Create;
Begin
Inherited create;
fFile := Nil;
End;
Destructor tgwavi.Destroy;
Begin
If Assigned(fFile) Then Close();
End;
(**
* This is the first function you should call when using gwavi library.
* It allocates memory for a gwavi_t structure and returns it and takes care of
* initializing the AVI header with the provided information.
*
* When you're done creating your AVI file, you should call gwavi_close()
* function to free memory allocated for the gwavi_t structure and properly
* close the output file.
*
* @param filename This is the name of the AVI file which will be generated by
* this library.
* @param width Width of a frame.
* @param height Height of a frame.
* @param fourcc FourCC representing the codec of the video encoded stream. a
* FourCC is a sequence of four chars used to uniquely identify data formats.
* For more information, you can visit www.fourcc.org.
* @param fps Number of frames per second of your video. It needs to be > 0.
* @param audio This parameter is optionnal. It is used for the audio track. If
* you do not want to add an audio track to your AVI file, simply pass NULL for
* this argument.
*
* @return Structure containing required information in order to create the AVI
* file. If an error occured, NULL is returned.
*)
Function tgwavi.Open(Const Filename: String; Width, Height: Integer;
fourcc: String; fps: integer; audio: p_gwavi_audio_t): Boolean;
Begin
result := false;
fLastError := '';
// Reset all internal Buffers in case the user calls multiple time open, ADD_*, close without freeing the instance
foffset_count := 0;
If assigned(fFile) Then ffile.free;
ffile := Nil;
If (Not check_fourcc(fourcc)) Then
fLastError := fLastError + format('WARNING: given fourcc does not seem to be valid: %s' + LineEnding, [fourcc]);
If (fps < 1) Then exit;
fFile := TFileStream.Create(Filename, fmOpenWrite Or fmCreate);
// if ((out = fopen(filename, "wb+")) == NULL) {
// perror("gwavi_open: failed to open file for writing");
// return NULL;
// }
// if ((gwavi = (struct gwavi_t *)malloc(sizeof(struct gwavi_t))) == NULL) {
// (void)fprintf(stderr, "gwavi_open: could not allocate memoryi "
// "for gwavi structure\n");
// return NULL;
// }
// memset(gwavi, 0, sizeof(struct gwavi_t));
//
// gwavi->out = out;
//
// /* set avi header */
favi_header.time_delay := 1000000 Div fps;
favi_header.data_rate := width * height * 3;
favi_header.flags := $10;
If assigned(audio) Then Begin
favi_header.data_streams := 2;
End
Else Begin
favi_header.data_streams := 1;
End;
// /* this field gets updated when calling gwavi_close() */
favi_header.number_of_frames := 0;
favi_header.width := width;
favi_header.height := height;
favi_header.buffer_size := (width * height * 3);
// /* set stream header */
fstream_header_v.data_type := 'vids';
fstream_header_v.codec := copy(fourcc, 1, 4); // Sicherstellen, dass Codec max 4 byte hat ;)
fstream_header_v.time_scale := 1;
fstream_header_v.data_rate := fps;
fstream_header_v.buffer_size := (width * height * 3);
fstream_header_v.data_length := 0;
// /* set stream format */
fstream_format_v.header_size := 40;
fstream_format_v.width := width;
fstream_format_v.height := height;
fstream_format_v.num_planes := 1;
fstream_format_v.bits_per_pixel := 24;
fstream_format_v.compression_type :=
(ord(fourcc[4]) Shl 24) +
(ord(fourcc[3]) Shl 16) +
(ord(fourcc[2]) Shl 8) +
(ord(fourcc[1]));
fstream_format_v.image_size := width * height * 3;
fstream_format_v.colors_used := 0;
fstream_format_v.colors_important := 0;
fstream_format_v.palette := Nil;
fstream_format_v.palette_count := 0;
If assigned(audio) Then Begin
// /* set stream header */
fstream_header_a.data_type := 'auds';
fstream_header_a.codec[0] := chr(1);
fstream_header_a.codec[1] := chr(0);
fstream_header_a.codec[2] := chr(0);
fstream_header_a.codec[3] := chr(0);
fstream_header_a.time_scale := 1;
fstream_header_a.data_rate := audio^.samples_per_second;
fstream_header_a.buffer_size := audio^.channels * (audio^.bits Div 8) * audio^.samples_per_second;
// /* when set to -1, drivers use default quality value */
fstream_header_a.audio_quality := -1;
fstream_header_a.sample_size := (audio^.bits Div 8) * audio^.channels;
// /* set stream format */
fstream_format_a.format_type := 1;
fstream_format_a.channels := audio^.channels;
fstream_format_a.sample_rate := audio^.samples_per_second;
fstream_format_a.bytes_per_second := audio^.channels * (audio^.bits Div 8) * audio^.samples_per_second;
fstream_format_a.block_align := audio^.channels * (audio^.bits Div 8);
fstream_format_a.bits_per_sample := audio^.bits;
fstream_format_a.size := 0;
End;
If (write_chars_bin(fFile, 'RIFF', 4) = -1) Then exit;
// goto write_chars_bin_failed;
If (write_int(fFile, 0) = -1) Then exit;
// (void)fprintf(stderr, "gwavi_info: write_int() failed\n");
// return NULL;
If (write_chars_bin(fFile, 'AVI ', 4) = -1) Then exit;
// goto write_chars_bin_failed;
If (write_avi_header_chunk() = -1) Then exit;
// (void)fprintf(stderr, "gwavi_info: write_avi_header_chunk "
// "failed\n");
// return NULL;
// }
If (write_chars_bin(ffile, 'LIST', 4) = -1) Then exit;
// goto write_chars_bin_failed;
fmarker := fFile.Position;
// if ((gwavi->marker = ftell(ffile)) = -1) {
// perror("gwavi_info (ftell)");
// return NULL;
// }
If (write_int(ffile, 0) = -1) Then exit;
// (void)fprintf(stderr, "gwavi_info: write_int() failed\n");
// return NULL;
// }
If (write_chars_bin(ffile, 'movi', 4) = -1) Then exit;
// goto write_chars_bin_failed;
//
Foffsets_len := 1024;
foffsets := Nil;
setlength(foffsets, foffsets_len);
//If ((foffsets = (unsigned int * )malloc((size_t)gwavi - > offsets_len *
// sizeof(unsigned int)))
// = NULL) {
// (void)fprintf(stderr, "gwavi_info: could not allocate memory "
// "for gwavi offsets table\n");
// return NULL;
// }
foffsets_ptr := 0;
result := true;
// return gwavi;
//write_chars_bin_failed:
// (void)fprintf(stderr, "gwavi_open: write_chars_bin() failed\n");
// return NULL;
End;
(**
* This function allows you to add an encoded video frame to the AVI file.
*
* @param gwavi Main gwavi structure initialized with gwavi_open()-
* @param buffer Video buffer size.
* @param len Video buffer length.
*
* @return 0 on success, -1 on error.
*)
Function tgwavi.Add_Frame(Stream: TStream): Boolean;
Var
maxi_pad, len: int64;
t: Integer;
Begin
result := false;
If Not assigned(fFile) Then exit; // Fehler keine Zieldatei geöffnet !
If Not assigned(Stream) Then exit;
len := Stream.Size - Stream.Position;
//size_t maxi_pad; /* if your frame is raggin, give it some paddin' */
// size_t t;
//
// if (!gwavi || !buffer) {
// (void)fputs("gwavi and/or buffer argument cannot be NULL",
// stderr);
// return -1;
// }
// if (len < 256)
// (void)fprintf(stderr, "WARNING: specified buffer len seems "
// "rather small: %d. Are you sure about this?\n",
// (int)len);
Foffset_count := Foffset_count + 1;
fstream_header_v.data_length := fstream_header_v.data_length + 1;
maxi_pad := len Mod 4;
If (maxi_pad > 0) Then maxi_pad := 4 - maxi_pad;
If (foffset_count >= foffsets_len) Then Begin
foffsets_len := foffsets_len + 1024;
SetLength(foffsets, foffsets_len);
// gwavi->offsets = (unsigned int *)realloc(gwavi->offsets,
// (size_t)gwavi->offsets_len *
// sizeof(unsigned int));
End;
foffsets[foffsets_ptr] := (len + maxi_pad);
foffsets_ptr := foffsets_ptr + 1;
If (write_chars_bin(ffile, '00dc', 4) = -1) Then exit;
// (void)fprintf(stderr, "gwavi_add_frame: write_chars_bin() "
// "failed\n");
// return -1;
// }
If (write_int(ffile, (len + maxi_pad)) = -1) Then exit;
// (void)fprintf(stderr, "gwavi_add_frame: write_int() failed\n");
// return -1;
// }
If fFile.CopyFrom(stream, len) <> len Then exit;
// if ((t = fwrite(buffer, 1, len, gwavi->out)) != len) {
// (void)fprintf(stderr, "gwavi_add_frame: fwrite() failed\n");
// return -1;
// }
//
//for (t = 0; t < maxi_pad; t++)
For t := 0 To maxi_pad - 1 Do Begin
If (fputc(0, fFile) = EOF) Then exit;
// (void)fprintf(stderr, "gwavi_add_frame: fputc() failed\n");
// return -1;
// }
End;
result := true;
End;
(**
* This function allows you to add the audio track to your AVI file.
*
* @param gwavi Main gwavi structure initialized with gwavi_open()-
* @param buffer Audio buffer size.
* @param len Audio buffer length.
*
* @return 0 on success, -1 on error.
*)
Function tgwavi.Add_Audio(Stream: TStream): Boolean;
Var
maxi_pad, len: int64;
t: Integer;
Begin
result := false;
If Not assigned(fFile) Then exit; // Fehler keine Zieldatei geöffnet !
If Not assigned(Stream) Then exit;
len := Stream.Size - Stream.Position;
// size_t maxi_pad; /* in case audio bleeds over the 4 byte boundary */
//size_t t;
//
//if (!gwavi || !buffer) {
// (void)fputs("gwavi and/or buffer argument cannot be NULL",
// stderr);
// return -1;
//}
//
foffset_count := foffset_count + 1;
maxi_pad := len Mod 4;
If (maxi_pad > 0) Then maxi_pad := 4 - maxi_pad;
If (foffset_count >= foffsets_len) Then Begin
foffsets_len := foffsets_len + 1024;
SetLength(foffsets, foffsets_len);
// gwavi->offsets = (unsigned int *)realloc(gwavi->offsets,
// (size_t)gwavi->offsets_len *
// sizeof(unsigned int));
End;
foffsets[foffsets_ptr] := ((len + maxi_pad) Or $80000000);
foffsets_ptr := foffsets_ptr + 1;
If (write_chars_bin(ffile, '01wb', 4) = -1) Then exit;
// (void)fprintf(stderr, "gwavi_add_audio: write_chars_bin() "
// "failed\n");
// return -1;
//}
If (write_int(ffile, (len + maxi_pad)) = -1) Then exit;
// (void)fprintf(stderr, "gwavi_add_audio: write_int() failed\n");
// return -1;
//}
If fFile.CopyFrom(stream, len) <> len Then exit;
//if ((t = fwrite(buffer, 1, len, ffile)) != len ) {
// (void)fprintf(stderr, "gwavi_add_audio: fwrite() failed\n");
// return -1;
//}
//for (t = 0; t < maxi_pad; t++)
// if (fputc(0,ffile) = EOF) {
// (void)fprintf(stderr, "gwavi_add_audio: fputc() failed\n");
// return -1;
// }
For t := 0 To maxi_pad - 1 Do Begin
If (fputc(0, fFile) = EOF) Then exit;
// (void)fprintf(stderr, "gwavi_add_frame: fputc() failed\n");
// return -1;
// }
End;
fstream_header_a.data_length := fstream_header_a.data_length + (len + maxi_pad);
result := true;
End;
(**
* This function should be called when the program is done adding video and/or
* audio frames to the AVI file. It frees memory allocated for gwavi_open() for
* the main gwavi_t structure. It also properly closes the output file.
*
* @param gwavi Main gwavi structure initialized with gwavi_open()-
*
* @return 0 on success, -1 on error.
*)
Function tgwavi.Close: Boolean;
Var
t: int64;
Begin
result := false;
// long t;
//
// if (!gwavi) {
// (void)fputs("gwavi argument cannot be NULL", stderr);
// return -1;
// }
t := fFile.Position;
// if ((t = ftell(gwavi->out)) == -1)
// goto ftell_failed;
fFile.Position := fmarker;
// if (fseek(gwavi->out, gwavi->marker, SEEK_SET) == -1)
// goto fseek_failed;
If (write_int(ffile, (t - fmarker - 4)) = -1) Then exit;
// (void)fprintf(stderr, "gwavi_close: write_int() failed\n");
// return -1;
// }
fFile.Position := t;
// if (fseek(ffile,t,SEEK_SET) = -1)
// goto fseek_failed;
If (write_index(ffile, foffset_count, foffsets) = -1) Then exit;
// (void)fprintf(stderr, "gwavi_close: write_index() failed\n");
// return -1;
// }
setlength(foffsets, 0);
// TODO: Reset der ganzen Zähler
// free(gwavi->offsets);
// /* reset some avi header fields */
favi_header.number_of_frames := fstream_header_v.data_length;
t := fFile.Position;
// if ((t = ftell(ffile)) = -1)
// goto ftell_failed;
fFile.Position := 12;
// if (fseek(ffile, 12, SEEK_SET) = -1)
// goto fseek_failed;
If (write_avi_header_chunk() = -1) Then exit;
// (void)fprintf(stderr, "gwavi_close: write_avi_header_chunk() "
// "failed\n");
// return -1;
// }
//fFile.Position := t;
//if (fseek(ffile, t, SEEK_SET) = -1)
// goto fseek_failed;
// if ((t = ftell(ffile)) = -1)
// goto ftell_failed;
fFile.Position := 4;
// if (fseek(ffile, 4, SEEK_SET) = -1)
// goto fseek_failed;
If (write_int(ffile, (t - 8)) = -1) Then exit;
// (void)fprintf(stderr, "gwavi_close: write_int() failed\n");
// return -1;
// }
fFile.Position := t;
// if (fseek(ffile, t, SEEK_SET) = -1)
// goto fseek_failed;
If assigned(fstream_format_v.palette) Then Begin
// free(gwavi->stream_format_v.palette);
SetLength(fstream_format_v.palette, 0);
End;
fFile.Free;
fFile := Nil;
// if (fclose(ffile) = EOF) {
// perror("gwavi_close (fclose)");
// return -1;
// }
// free(gwavi);
//
result := true;
//
//ftell_failed:
// perror("gwavi_close: (ftell)");
// return -1;
//
//fseek_failed:
// perror("gwavi_close (fseek)");
// return -1;
End;
Function tgwavi.write_avi_header_chunk: integer;
Var
sub_marker, marker, t: int64;
Begin
result := -1;
// long , t;
// long sub_marker;
// FILE *out = gwavi->out;
//
If (write_chars_bin(fFile, 'LIST', 4) = -1) Then exit;
// goto write_chars_bin_failed;
marker := fFile.Position;
//if ((marker = ftell(fFile)) == -1)
// goto ftell_failed;
If (write_int(fFile, 0) = -1) Then exit;
// goto write_int_failed;
If (write_chars_bin(fFile, 'hdrl', 4) = -1) Then exit;
// goto write_chars_bin_failed;
If (write_avi_header(favi_header) = -1) Then exit;
// (void)fprintf(stderr, "write_avi_header_chunk: "
// "write_avi_header() failed\n");
// return -1;
// }
If (write_chars_bin(fFile, 'LIST', 4) = -1) Then exit;
// goto write_chars_bin_failed;
sub_marker := fFile.Position;
// if ((sub_marker = ftell(fFile)) == -1)
// goto ftell_failed;
If (write_int(fFile, 0) = -1) Then exit;
// goto write_int_failed;
If (write_chars_bin(fFile, 'strl', 4) = -1) Then exit;
// goto write_chars_bin_failed;
If (write_stream_header(fstream_header_v) = -1) Then exit;
// (void)fprintf(stderr, "write_avi_header_chunk: "
// "write_stream_header failed\n");
// return -1;
// }
If (write_stream_format_v(fstream_format_v) = -1) Then exit;
// (void)fprintf(stderr, "write_avi_header_chunk: "
// "write_stream_format_v failed\n");
// return -1;
// }
t := fFile.Position;
// if ((t = ftell(fFile)) == -1)
// goto ftell_failed;
fFile.Position := sub_marker;
// if (fseek(fFile, sub_marker, SEEK_SET) == -1)
// goto fseek_failed;
If (write_int(fFile, (t - sub_marker - 4)) = -1) Then exit;
// goto write_int_failed;
fFile.Position := t;
// if (fseek(fFile, t, SEEK_SET) == -1)
// goto fseek_failed;
If (favi_header.data_streams = 2) Then Begin
If (write_chars_bin(fFile, 'LIST', 4) = -1) Then exit;
// goto write_chars_bin_failed;
sub_marker := fFile.Position;
// if ((sub_marker = ftell(fFile)) == -1)
// goto ftell_failed;
If (write_int(fFile, 0) = -1) Then exit;
// goto write_int_failed;
If (write_chars_bin(fFile, 'strl', 4) = -1) Then exit;
// goto write_chars_bin_failed;
If (write_stream_header(fstream_header_a) = -1) Then exit;
// (void)fprintf(stderr, "write_avi_header_chunk: "
// "write_stream_header failed\n");
// return -1;
// }
If (write_stream_format_a(fstream_format_a) = -1) Then exit;
// (void)fprintf(stderr, "write_avi_header_chunk: "
// "write_stream_format_a failed\n");
// return -1;
// }
t := fFile.Position;
// if ((t = ftell(fFile)) == -1)
// goto ftell_failed;
fFile.Position := sub_marker;
// if (fseek(fFile, sub_marker, SEEK_SET) == -1)
// goto fseek_failed;
If (write_int(fFile, (t - sub_marker - 4)) = -1) Then exit;
// goto write_int_failed;
fFile.Position := t;
// if (fseek(fFile, t, SEEK_SET) == -1)
// goto fseek_failed;
End;
t := fFile.Position;
// if ((t = ftell(fFile)) == -1)
// goto ftell_failed;
fFile.Position := marker;
// if (fseek(fFile, marker, SEEK_SET) == -1)
// goto fseek_failed;
If (write_int(fFile, (t - marker - 4)) = -1) Then exit;
// goto write_int_failed;
fFile.Position := t;
// if (fseek(fFile, t, SEEK_SET) == -1)
// goto fseek_failed;
//ftell_failed:
// perror("write_avi_header_chunk (ftell)");
// return -1;
//
//fseek_failed:
// perror("write_avi_header_chunk (fseek)");
// return -1;
//
//write_int_failed:
// (void)fprintf(stderr, "write_avi_header_chunk: write_int() failed\n");
// return -1;
//
//write_chars_bin_failed:
// (void)fprintf(stderr, "write_avi_header_chunk: write_chars_bin() failed\n");
// return -1;
result := 0;
End;
Function tgwavi.write_avi_header(Const avi_header: gwavi_header_t): integer;
Var
Marker, t: Int64;
Begin
result := -1;
If (write_chars_bin(fFile, 'avih', 4) = -1) Then exit;
// (void)fprintf(stderr, "write_avi_header: write_chars_bin() "
// "failed\n");
// return -1;
// }
marker := fFile.Position;
// if ((marker = ftell(fFile)) == -1) {
// perror("write_avi_header (ftell)");
// return -1;
//}
If (write_int(fFile, 0) = -1) Then exit;
// goto write_int_failed;
If (write_int(fFile, avi_header.time_delay) = -1) Then exit;
// goto write_int_failed;
If (write_int(fFile, avi_header.data_rate) = -1) Then exit;
// goto write_int_failed;
If (write_int(fFile, avi_header.reserved) = -1) Then exit;
// goto write_int_failed;
// /* dwFlags */
If (write_int(fFile, avi_header.flags) = -1) Then exit;
// goto write_int_failed;
// /* dwTotalFrames */
If (write_int(fFile, avi_header.number_of_frames) = -1) Then exit;
// goto write_int_failed;
If (write_int(fFile, avi_header.initial_frames) = -1) Then exit;
// goto write_int_failed;
If (write_int(fFile, avi_header.data_streams) = -1) Then exit;
// goto write_int_failed;
If (write_int(fFile, avi_header.buffer_size) = -1) Then exit;
// goto write_int_failed;
If (write_int(fFile, avi_header.width) = -1) Then exit;
// goto write_int_failed;
If (write_int(fFile, avi_header.height) = -1) Then exit;
// goto write_int_failed;
If (write_int(fFile, avi_header.time_scale) = -1) Then exit;
// goto write_int_failed;
If (write_int(fFile, avi_header.playback_data_rate) = -1) Then exit;
// goto write_int_failed;
If (write_int(fFile, avi_header.starting_time) = -1) Then exit;
// goto write_int_failed;
If (write_int(fFile, avi_header.data_length) = -1) Then exit;
// goto write_int_failed;
t := fFile.Position;
// if ((t = ftell(fFile)) == -1) {
// perror("write_avi_header (ftell)");
// return -1;
// }
fFile.Position := Marker;
// if (fseek(fFile, marker, SEEK_SET) == -1) {
// perror("write_avi_header (fseek)");
// return -1;
// }
If (write_int(fFile, (t - marker - 4)) = -1) Then exit;
// goto write_int_failed;
fFile.Position := t;
// if (fseek(fFile, t, SEEK_SET) == -1) {
// perror("write_avi_header (fseek)");
// return -1;
// }
result := 0;
//write_int_failed:
// (void)fprintf(stderr, "write_avi_header: write_int() failed\n");
// return -1;
End;