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avilib.c
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avilib.c
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/*
* avilib.c
*
* Copyright (C) Thomas streich - June 2001
* multiple audio track support Copyright (C) 2002 Thomas streich
*
* Original code:
* Copyright (C) 1999 Rainer Johanni <Rainer@Johanni.de>
*
* This file is part of transcode, a linux video stream processing tool
*
* transcode is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* transcode is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Make; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
//SLM
#ifdef WIN32
#include <io.h>
#define ftruncate _chsize
#define strncasecmp _strnicmp
typedef int ssize_t;
#endif
#ifdef __CYGWIN__
#include <unistd.h>
#endif
#include "avilib.h"
//#include <time.h>
#define INFO_LIST
/* The following variable indicates the kind of error */
long AVI_errno = 0;
#define MAX_INFO_STRLEN 64
static char id_str[MAX_INFO_STRLEN];
#define FRAME_RATE_SCALE 1000000
/*******************************************************************
* *
* Utilities for writing an AVI File *
* *
*******************************************************************/
static size_t avi_read(int fd, char *buf, size_t len)
{
size_t n = 0;
size_t r = 0;
while (r < len) {
n = read (fd, buf + r, len - r);
if ((ssize_t)n <= 0)
return r;
r += n;
}
return r;
}
static size_t avi_write (int fd, char *buf, size_t len)
{
size_t n = 0;
size_t r = 0;
while (r < len) {
n = write (fd, buf + r, len - r);
if ((ssize_t)n < 0)
return n;
r += n;
}
return r;
}
/* HEADERBYTES: The number of bytes to reserve for the header */
#define HEADERBYTES 2048
/* AVI_MAX_LEN: The maximum length of an AVI file, we stay a bit below
the 2GB limit (Remember: 2*10^9 is smaller than 2 GB) */
#define AVI_MAX_LEN (UINT_MAX-(1<<20)*16-HEADERBYTES)
#define PAD_EVEN(x) ( ((x)+1) & ~1 )
/* Copy n into dst as a 4 byte, little endian number.
Should also work on big endian machines */
static void long2str(unsigned char *dst, int n)
{
dst[0] = (n )&0xff;
dst[1] = (n>> 8)&0xff;
dst[2] = (n>>16)&0xff;
dst[3] = (n>>24)&0xff;
}
/* Convert a string of 4 or 2 bytes to a number,
also working on big endian machines */
static unsigned long str2ulong(unsigned char *str)
{
return ( str[0] | (str[1]<<8) | (str[2]<<16) | (str[3]<<24) );
}
static unsigned long str2ushort(unsigned char *str)
{
return ( str[0] | (str[1]<<8) );
}
/* Calculate audio sample size from number of bits and number of channels.
This may have to be adjusted for eg. 12 bits and stereo */
static int avi_sampsize(avi_t *AVI, int j)
{
int s;
s = ((AVI->track[j].a_bits+7)/8)*AVI->track[j].a_chans;
// if(s==0) s=1; /* avoid possible zero divisions */
if(s<4) s=4; /* avoid possible zero divisions */
return s;
}
/* Add a chunk (=tag and data) to the AVI file,
returns -1 on write error, 0 on success */
static int avi_add_chunk(avi_t *AVI, unsigned char *tag, unsigned char *data, int length)
{
unsigned char c[8];
/* Copy tag and length int c, so that we need only 1 write system call
for these two values */
memcpy(c,tag,4);
long2str(c+4,length);
/* Output tag, length and data, restore previous position
if the write fails */
length = PAD_EVEN(length);
if( avi_write(AVI->fdes,(char *)c,8) != 8 ||
avi_write(AVI->fdes,(char *)data,length) != length )
{
lseek(AVI->fdes,AVI->pos,SEEK_SET);
AVI_errno = AVI_ERR_WRITE;
return -1;
}
/* Update file position */
AVI->pos += 8 + length;
//fprintf(stderr, "pos=%lu %s\n", AVI->pos, tag);
return 0;
}
static int avi_add_index_entry(avi_t *AVI, unsigned char *tag, long flags, unsigned long pos, unsigned long len)
{
void *ptr;
if(AVI->n_idx>=AVI->max_idx) {
ptr = realloc((void *)AVI->idx,(AVI->max_idx+4096)*16);
if(ptr == 0) {
AVI_errno = AVI_ERR_NO_MEM;
return -1;
}
AVI->max_idx += 4096;
AVI->idx = (unsigned char((*)[16]) ) ptr;
}
/* Add index entry */
// fprintf(stderr, "INDEX %s %ld %lu %lu\n", tag, flags, pos, len);
memcpy(AVI->idx[AVI->n_idx],tag,4);
long2str(AVI->idx[AVI->n_idx]+ 4,flags);
long2str(AVI->idx[AVI->n_idx]+ 8, pos);
long2str(AVI->idx[AVI->n_idx]+12, len);
/* Update counter */
AVI->n_idx++;
if(len>AVI->max_len) AVI->max_len=len;
return 0;
}
//SLM
#ifndef S_IRUSR
#define S_IRWXU 00700 /* read, write, execute: owner */
#define S_IRUSR 00400 /* read permission: owner */
#define S_IWUSR 00200 /* write permission: owner */
#define S_IXUSR 00100 /* execute permission: owner */
#define S_IRWXG 00070 /* read, write, execute: group */
#define S_IRGRP 00040 /* read permission: group */
#define S_IWGRP 00020 /* write permission: group */
#define S_IXGRP 00010 /* execute permission: group */
#define S_IRWXO 00007 /* read, write, execute: other */
#define S_IROTH 00004 /* read permission: other */
#define S_IWOTH 00002 /* write permission: other */
#define S_IXOTH 00001 /* execute permission: other */
#endif
/*
AVI_open_output_file: Open an AVI File and write a bunch
of zero bytes as space for the header.
returns a pointer to avi_t on success, a zero pointer on error
*/
avi_t* AVI_open_output_file(char * filename)
{
avi_t *AVI;
int i;
int mask;
unsigned char AVI_header[HEADERBYTES];
/* Allocate the avi_t struct and zero it */
AVI = (avi_t *) malloc(sizeof(avi_t));
if(AVI==0)
{
AVI_errno = AVI_ERR_NO_MEM;
return 0;
}
memset((void *)AVI,0,sizeof(avi_t));
/* Since Linux needs a long time when deleting big files,
we do not truncate the file when we open it.
Instead it is truncated when the AVI file is closed */
mask = umask (0);
umask (mask);
#ifdef WIN32
AVI->fdes = open(filename, O_RDWR|O_CREAT|O_BINARY, (S_IRUSR | S_IWUSR) &~ mask);
#else
AVI->fdes = open(filename, O_RDWR|O_CREAT, (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) &~ mask);
#endif
if (AVI->fdes < 0)
{
AVI_errno = AVI_ERR_OPEN;
free(AVI);
return 0;
}
/* Write out HEADERBYTES bytes, the header will go here
when we are finished with writing */
for (i=0;i<HEADERBYTES;i++) AVI_header[i] = 0;
i = avi_write(AVI->fdes,(char *)AVI_header,HEADERBYTES);
if (i != HEADERBYTES)
{
close(AVI->fdes);
AVI_errno = AVI_ERR_WRITE;
free(AVI);
return 0;
}
AVI->pos = HEADERBYTES;
AVI->mode = AVI_MODE_WRITE; /* open for writing */
//init
AVI->anum = 0;
AVI->aptr = 0;
return AVI;
}
void AVI_set_video(avi_t *AVI, int width, int height, double fps, char *compressor)
{
/* may only be called if file is open for writing */
if(AVI->mode==AVI_MODE_READ) return;
AVI->width = width;
AVI->height = height;
AVI->fps = fps;
if(strncmp(compressor, "RGB", 3)==0) {
memset(AVI->compressor, 0, 4);
} else {
memcpy(AVI->compressor,compressor,4);
}
AVI->compressor[4] = 0;
avi_update_header(AVI);
}
void AVI_set_audio(avi_t *AVI, int channels, long rate, int bits, int format, long mp3rate)
{
/* may only be called if file is open for writing */
if(AVI->mode==AVI_MODE_READ) return;
//inc audio tracks
AVI->aptr=AVI->anum;
++AVI->anum;
if(AVI->anum > AVI_MAX_TRACKS) {
fprintf(stderr, "error - only %d audio tracks supported\n", AVI_MAX_TRACKS);
exit(1);
}
AVI->track[AVI->aptr].a_chans = channels;
AVI->track[AVI->aptr].a_rate = rate;
AVI->track[AVI->aptr].a_bits = bits;
AVI->track[AVI->aptr].a_fmt = format;
AVI->track[AVI->aptr].mp3rate = mp3rate;
avi_update_header(AVI);
}
#define OUT4CC(s) \
if(nhb<=HEADERBYTES-4) memcpy(AVI_header+nhb,s,4); nhb += 4
#define OUTLONG(n) \
if(nhb<=HEADERBYTES-4) long2str(AVI_header+nhb,n); nhb += 4
#define OUTSHRT(n) \
if(nhb<=HEADERBYTES-2) { \
AVI_header[nhb ] = (n )&0xff; \
AVI_header[nhb+1] = (n>>8)&0xff; \
} \
nhb += 2
//ThOe write preliminary AVI file header: 0 frames, max vid/aud size
int avi_update_header(avi_t *AVI)
{
int njunk, sampsize, hasIndex, ms_per_frame, frate, flag;
int movi_len, hdrl_start, strl_start, j;
unsigned char AVI_header[HEADERBYTES];
long nhb;
//assume max size
movi_len = AVI_MAX_LEN - HEADERBYTES + 4;
//assume index will be written
hasIndex=1;
if(AVI->fps < 0.001) {
frate=0;
ms_per_frame=0;
} else {
frate = (int) (FRAME_RATE_SCALE*AVI->fps + 0.5);
ms_per_frame=(int) (1000000/AVI->fps + 0.5);
}
/* Prepare the file header */
nhb = 0;
/* The RIFF header */
OUT4CC ("RIFF");
OUTLONG(movi_len); // assume max size
OUT4CC ("AVI ");
/* Start the header list */
OUT4CC ("LIST");
OUTLONG(0); /* Length of list in bytes, don't know yet */
hdrl_start = nhb; /* Store start position */
OUT4CC ("hdrl");
/* The main AVI header */
/* The Flags in AVI File header */
#define AVIF_HASINDEX 0x00000010 /* Index at end of file */
#define AVIF_MUSTUSEINDEX 0x00000020
#define AVIF_ISINTERLEAVED 0x00000100
#define AVIF_TRUSTCKTYPE 0x00000800 /* Use CKType to find key frames */
#define AVIF_WASCAPTUREFILE 0x00010000
#define AVIF_COPYRIGHTED 0x00020000
OUT4CC ("avih");
OUTLONG(56); /* # of bytes to follow */
OUTLONG(ms_per_frame); /* Microseconds per frame */
//ThOe ->0
// OUTLONG(10000000); /* MaxBytesPerSec, I hope this will never be used */
OUTLONG(0);
OUTLONG(0); /* PaddingGranularity (whatever that might be) */
/* Other sources call it 'reserved' */
flag = AVIF_ISINTERLEAVED;
if(hasIndex) flag |= AVIF_HASINDEX;
if(hasIndex && AVI->must_use_index) flag |= AVIF_MUSTUSEINDEX;
OUTLONG(flag); /* Flags */
OUTLONG(0); // no frames yet
OUTLONG(0); /* InitialFrames */
OUTLONG(AVI->anum+1);
OUTLONG(0); /* SuggestedBufferSize */
OUTLONG(AVI->width); /* Width */
OUTLONG(AVI->height); /* Height */
/* MS calls the following 'reserved': */
OUTLONG(0); /* TimeScale: Unit used to measure time */
OUTLONG(0); /* DataRate: Data rate of playback */
OUTLONG(0); /* StartTime: Starting time of AVI data */
OUTLONG(0); /* DataLength: Size of AVI data chunk */
/* Start the video stream list ---------------------------------- */
OUT4CC ("LIST");
OUTLONG(0); /* Length of list in bytes, don't know yet */
strl_start = nhb; /* Store start position */
OUT4CC ("strl");
/* The video stream header */
OUT4CC ("strh");
OUTLONG(56); /* # of bytes to follow */
OUT4CC ("vids"); /* Type */
OUT4CC (AVI->compressor); /* Handler */
OUTLONG(0); /* Flags */
OUTLONG(0); /* Reserved, MS says: wPriority, wLanguage */
OUTLONG(0); /* InitialFrames */
OUTLONG(FRAME_RATE_SCALE); /* Scale */
OUTLONG(frate); /* Rate: Rate/Scale == samples/second */
OUTLONG(0); /* Start */
OUTLONG(0); // no frames yet
OUTLONG(0); /* SuggestedBufferSize */
OUTLONG(-1); /* Quality */
OUTLONG(0); /* SampleSize */
OUTLONG(0); /* Frame */
OUTLONG(0); /* Frame */
// OUTLONG(0); /* Frame */
//OUTLONG(0); /* Frame */
/* The video stream format */
OUT4CC ("strf");
OUTLONG(40); /* # of bytes to follow */
OUTLONG(40); /* Size */
OUTLONG(AVI->width); /* Width */
OUTLONG(AVI->height); /* Height */
OUTSHRT(1); OUTSHRT(24); /* Planes, Count */
OUT4CC (AVI->compressor); /* Compression */
// ThOe (*3)
OUTLONG(AVI->width*AVI->height*3); /* SizeImage (in bytes?) */
OUTLONG(0); /* XPelsPerMeter */
OUTLONG(0); /* YPelsPerMeter */
OUTLONG(0); /* ClrUsed: Number of colors used */
OUTLONG(0); /* ClrImportant: Number of colors important */
/* Finish stream list, i.e. put number of bytes in the list to proper pos */
long2str(AVI_header+strl_start-4,nhb-strl_start);
/* Start the audio stream list ---------------------------------- */
for(j=0; j<AVI->anum; ++j) {
sampsize = avi_sampsize(AVI, j);
OUT4CC ("LIST");
OUTLONG(0); /* Length of list in bytes, don't know yet */
strl_start = nhb; /* Store start position */
OUT4CC ("strl");
/* The audio stream header */
OUT4CC ("strh");
OUTLONG(56); /* # of bytes to follow */
OUT4CC ("auds");
// -----------
// ThOe
OUTLONG(0); /* Format (Optionally) */
// -----------
OUTLONG(0); /* Flags */
OUTLONG(0); /* Reserved, MS says: wPriority, wLanguage */
OUTLONG(0); /* InitialFrames */
// ThOe /4
OUTLONG(sampsize/4); /* Scale */
OUTLONG(1000*AVI->track[j].mp3rate/8);
OUTLONG(0); /* Start */
OUTLONG(4*AVI->track[j].audio_bytes/sampsize); /* Length */
OUTLONG(0); /* SuggestedBufferSize */
OUTLONG(-1); /* Quality */
// ThOe /4
OUTLONG(sampsize/4); /* SampleSize */
OUTLONG(0); /* Frame */
OUTLONG(0); /* Frame */
// OUTLONG(0); /* Frame */
//OUTLONG(0); /* Frame */
/* The audio stream format */
OUT4CC ("strf");
OUTLONG(16); /* # of bytes to follow */
OUTSHRT(AVI->track[j].a_fmt); /* Format */
OUTSHRT(AVI->track[j].a_chans); /* Number of channels */
OUTLONG(AVI->track[j].a_rate); /* SamplesPerSec */
// ThOe
OUTLONG(1000*AVI->track[j].mp3rate/8);
//ThOe (/4)
OUTSHRT(sampsize/4); /* BlockAlign */
OUTSHRT(AVI->track[j].a_bits); /* BitsPerSample */
/* Finish stream list, i.e. put number of bytes in the list to proper pos */
long2str(AVI_header+strl_start-4,nhb-strl_start);
}
/* Finish header list */
long2str(AVI_header+hdrl_start-4,nhb-hdrl_start);
/* Calculate the needed amount of junk bytes, output junk */
njunk = HEADERBYTES - nhb - 8 - 12;
/* Safety first: if njunk <= 0, somebody has played with
HEADERBYTES without knowing what (s)he did.
This is a fatal error */
if(njunk<=0)
{
fprintf(stderr,"AVI_close_output_file: # of header bytes too small\n");
exit(1);
}
OUT4CC ("JUNK");
OUTLONG(njunk);
memset(AVI_header+nhb,0,njunk);
//2001-11-14 added id string
if(njunk > strlen(id_str)+8) {
//sprintf(id_str, "%s-%s", PACKAGE, VERSION);
//memcpy(AVI_header+nhb, id_str, strlen(id_str));
}
nhb += njunk;
/* Start the movi list */
OUT4CC ("LIST");
OUTLONG(movi_len); /* Length of list in bytes */
OUT4CC ("movi");
/* Output the header, truncate the file to the number of bytes
actually written, report an error if someting goes wrong */
if ( lseek(AVI->fdes,0,SEEK_SET)<0 ||
avi_write(AVI->fdes,(char *)AVI_header,HEADERBYTES)!=HEADERBYTES ||
lseek(AVI->fdes,AVI->pos,SEEK_SET)<0)
{
AVI_errno = AVI_ERR_CLOSE;
return -1;
}
return 0;
}
/*
Write the header of an AVI file and close it.
returns 0 on success, -1 on write error.
*/
static int avi_close_output_file(avi_t *AVI)
{
int ret, njunk, sampsize, hasIndex, ms_per_frame, frate, idxerror, flag;
unsigned long movi_len;
int hdrl_start, strl_start, j;
unsigned char AVI_header[HEADERBYTES];
long nhb;
#ifdef INFO_LIST
long info_len;
// time_t calptr;
#endif
/* Calculate length of movi list */
movi_len = AVI->pos - HEADERBYTES + 4;
/* Try to ouput the index entries. This may fail e.g. if no space
is left on device. We will report this as an error, but we still
try to write the header correctly (so that the file still may be
readable in the most cases */
idxerror = 0;
// fprintf(stderr, "pos=%lu, index_len=%ld \n", AVI->pos, AVI->n_idx*16);
ret = avi_add_chunk(AVI, (unsigned char *)"idx1", (unsigned char *)AVI->idx, AVI->n_idx*16);
hasIndex = (ret==0);
//fprintf(stderr, "pos=%lu, index_len=%d\n", AVI->pos, hasIndex);
if(ret) {
idxerror = 1;
AVI_errno = AVI_ERR_WRITE_INDEX;
}
/* Calculate Microseconds per frame */
if(AVI->fps < 0.001) {
frate=0;
ms_per_frame=0;
} else {
frate = (int) (FRAME_RATE_SCALE*AVI->fps + 0.5);
ms_per_frame=(int) (1000000/AVI->fps + 0.5);
}
/* Prepare the file header */
nhb = 0;
/* The RIFF header */
OUT4CC ("RIFF");
OUTLONG(AVI->pos - 8); /* # of bytes to follow */
OUT4CC ("AVI ");
/* Start the header list */
OUT4CC ("LIST");
OUTLONG(0); /* Length of list in bytes, don't know yet */
hdrl_start = nhb; /* Store start position */
OUT4CC ("hdrl");
/* The main AVI header */
/* The Flags in AVI File header */
#define AVIF_HASINDEX 0x00000010 /* Index at end of file */
#define AVIF_MUSTUSEINDEX 0x00000020
#define AVIF_ISINTERLEAVED 0x00000100
#define AVIF_TRUSTCKTYPE 0x00000800 /* Use CKType to find key frames */
#define AVIF_WASCAPTUREFILE 0x00010000
#define AVIF_COPYRIGHTED 0x00020000
OUT4CC ("avih");
OUTLONG(56); /* # of bytes to follow */
OUTLONG(ms_per_frame); /* Microseconds per frame */
//ThOe ->0
// OUTLONG(10000000); /* MaxBytesPerSec, I hope this will never be used */
OUTLONG(0);
OUTLONG(0); /* PaddingGranularity (whatever that might be) */
/* Other sources call it 'reserved' */
flag = AVIF_ISINTERLEAVED;
if(hasIndex) flag |= AVIF_HASINDEX;
if(hasIndex && AVI->must_use_index) flag |= AVIF_MUSTUSEINDEX;
OUTLONG(flag); /* Flags */
OUTLONG(AVI->video_frames); /* TotalFrames */
OUTLONG(0); /* InitialFrames */
OUTLONG(AVI->anum+1);
// if (AVI->track[0].audio_bytes)
// { OUTLONG(2); } /* Streams */
// else
// { OUTLONG(1); } /* Streams */
OUTLONG(0); /* SuggestedBufferSize */
OUTLONG(AVI->width); /* Width */
OUTLONG(AVI->height); /* Height */
/* MS calls the following 'reserved': */
OUTLONG(0); /* TimeScale: Unit used to measure time */
OUTLONG(0); /* DataRate: Data rate of playback */
OUTLONG(0); /* StartTime: Starting time of AVI data */
OUTLONG(0); /* DataLength: Size of AVI data chunk */
/* Start the video stream list ---------------------------------- */
OUT4CC ("LIST");
OUTLONG(0); /* Length of list in bytes, don't know yet */
strl_start = nhb; /* Store start position */
OUT4CC ("strl");
/* The video stream header */
OUT4CC ("strh");
OUTLONG(56); /* # of bytes to follow */
OUT4CC ("vids"); /* Type */
OUT4CC (AVI->compressor); /* Handler */
OUTLONG(0); /* Flags */
OUTLONG(0); /* Reserved, MS says: wPriority, wLanguage */
OUTLONG(0); /* InitialFrames */
OUTLONG(FRAME_RATE_SCALE); /* Scale */
OUTLONG(frate); /* Rate: Rate/Scale == samples/second */
OUTLONG(0); /* Start */
OUTLONG(AVI->video_frames); /* Length */
OUTLONG(0); /* SuggestedBufferSize */
OUTLONG(-1); /* Quality */
OUTLONG(0); /* SampleSize */
OUTLONG(0); /* Frame */
OUTLONG(0); /* Frame */
// OUTLONG(0); /* Frame */
//OUTLONG(0); /* Frame */
/* The video stream format */
OUT4CC ("strf");
OUTLONG(40); /* # of bytes to follow */
OUTLONG(40); /* Size */
OUTLONG(AVI->width); /* Width */
OUTLONG(AVI->height); /* Height */
OUTSHRT(1); OUTSHRT(24); /* Planes, Count */
OUT4CC (AVI->compressor); /* Compression */
// ThOe (*3)
OUTLONG(AVI->width*AVI->height*3); /* SizeImage (in bytes?) */
OUTLONG(0); /* XPelsPerMeter */
OUTLONG(0); /* YPelsPerMeter */
OUTLONG(0); /* ClrUsed: Number of colors used */
OUTLONG(0); /* ClrImportant: Number of colors important */
/* Finish stream list, i.e. put number of bytes in the list to proper pos */
long2str(AVI_header+strl_start-4,nhb-strl_start);
/* Start the audio stream list ---------------------------------- */
for(j=0; j<AVI->anum; ++j) {
//if (AVI->track[j].a_chans && AVI->track[j].audio_bytes)
{
sampsize = avi_sampsize(AVI, j);
OUT4CC ("LIST");
OUTLONG(0); /* Length of list in bytes, don't know yet */
strl_start = nhb; /* Store start position */
OUT4CC ("strl");
/* The audio stream header */
OUT4CC ("strh");
OUTLONG(56); /* # of bytes to follow */
OUT4CC ("auds");
// -----------
// ThOe
OUTLONG(0); /* Format (Optionally) */
// -----------
OUTLONG(0); /* Flags */
OUTLONG(0); /* Reserved, MS says: wPriority, wLanguage */
OUTLONG(0); /* InitialFrames */
// ThOe /4
OUTLONG(sampsize/4); /* Scale */
OUTLONG(1000*AVI->track[j].mp3rate/8);
OUTLONG(0); /* Start */
OUTLONG(4*AVI->track[j].audio_bytes/sampsize); /* Length */
OUTLONG(0); /* SuggestedBufferSize */
OUTLONG(-1); /* Quality */
// ThOe /4
OUTLONG(sampsize/4); /* SampleSize */
OUTLONG(0); /* Frame */
OUTLONG(0); /* Frame */
// OUTLONG(0); /* Frame */
//OUTLONG(0); /* Frame */
/* The audio stream format */
OUT4CC ("strf");
OUTLONG(16); /* # of bytes to follow */
OUTSHRT(AVI->track[j].a_fmt); /* Format */
OUTSHRT(AVI->track[j].a_chans); /* Number of channels */
OUTLONG(AVI->track[j].a_rate); /* SamplesPerSec */
// ThOe
OUTLONG(1000*AVI->track[j].mp3rate/8);
//ThOe (/4)
OUTSHRT(sampsize/4); /* BlockAlign */
OUTSHRT(AVI->track[j].a_bits); /* BitsPerSample */
/* Finish stream list, i.e. put number of bytes in the list to proper pos */
}
long2str(AVI_header+strl_start-4,nhb-strl_start);
}
/* Finish header list */
long2str(AVI_header+hdrl_start-4,nhb-hdrl_start);
// add INFO list --- (0.6.0pre4)
#ifdef INFO_LIST
OUT4CC ("LIST");
//FIXME
info_len = MAX_INFO_STRLEN + 12;
OUTLONG(info_len);
OUT4CC ("INFO");
// OUT4CC ("INAM");
// OUTLONG(MAX_INFO_STRLEN);
// sprintf(id_str, "\t");
// memset(AVI_header+nhb, 0, MAX_INFO_STRLEN);
// memcpy(AVI_header+nhb, id_str, strlen(id_str));
// nhb += MAX_INFO_STRLEN;
OUT4CC ("ISFT");
OUTLONG(MAX_INFO_STRLEN);
//sprintf(id_str, "%s-%s", PACKAGE, VERSION);
memset(AVI_header+nhb, 0, MAX_INFO_STRLEN);
//memcpy(AVI_header+nhb, id_str, strlen(id_str));
nhb += MAX_INFO_STRLEN;
// OUT4CC ("ICMT");
// OUTLONG(MAX_INFO_STRLEN);
// calptr=time(NULL);
// sprintf(id_str, "\t%s %s", ctime(&calptr), "");
// memset(AVI_header+nhb, 0, MAX_INFO_STRLEN);
// memcpy(AVI_header+nhb, id_str, 25);
// nhb += MAX_INFO_STRLEN;
#endif
// ----------------------------
/* Calculate the needed amount of junk bytes, output junk */
njunk = HEADERBYTES - nhb - 8 - 12;
/* Safety first: if njunk <= 0, somebody has played with
HEADERBYTES without knowing what (s)he did.
This is a fatal error */
if(njunk<=0)
{
fprintf(stderr,"AVI_close_output_file: # of header bytes too small\n");
exit(1);
}
OUT4CC ("JUNK");
OUTLONG(njunk);
memset(AVI_header+nhb,0,njunk);
nhb += njunk;
/* Start the movi list */
OUT4CC ("LIST");
OUTLONG(movi_len); /* Length of list in bytes */
OUT4CC ("movi");
/* Output the header, truncate the file to the number of bytes
actually written, report an error if someting goes wrong */
if ( lseek(AVI->fdes,0,SEEK_SET)<0 ||
avi_write(AVI->fdes,(char *)AVI_header,HEADERBYTES)!=HEADERBYTES ||
ftruncate(AVI->fdes,AVI->pos)<0 )
{
AVI_errno = AVI_ERR_CLOSE;
return -1;
}
if(idxerror) return -1;
return 0;
}
/*
AVI_write_data:
Add video or audio data to the file;
Return values:
0 No error;
-1 Error, AVI_errno is set appropriatly;
*/
static int avi_write_data(avi_t *AVI, char *data, unsigned long length, int audio, int keyframe)
{
int n;
unsigned char astr[5];
/* Check for maximum file length */
if ( (AVI->pos + 8 + length + 8 + (AVI->n_idx+1)*16) > AVI_MAX_LEN ) {
AVI_errno = AVI_ERR_SIZELIM;
return -1;
}
/* Add index entry */
//set tag for current audio track
sprintf((char *)astr, "0%1dwb", (int)(AVI->aptr+1));
if(audio)
n = avi_add_index_entry(AVI,astr,0x00,AVI->pos,length);
else
n = avi_add_index_entry(AVI,(unsigned char *)"00db",((keyframe)?0x10:0x0),AVI->pos,length);
if(n) return -1;
/* Output tag and data */
if(audio)
n = avi_add_chunk(AVI,astr,(unsigned char *)data,length);
else
n = avi_add_chunk(AVI,(unsigned char *)"00db",(unsigned char *)data,length);
if (n) return -1;
return 0;
}
int AVI_write_frame(avi_t *AVI, char *data, long bytes, int keyframe)
{
unsigned long pos;
if(AVI->mode==AVI_MODE_READ) { AVI_errno = AVI_ERR_NOT_PERM; return -1; }
pos = AVI->pos;
if(avi_write_data(AVI,data,bytes,0,keyframe)) return -1;
AVI->last_pos = pos;
AVI->last_len = bytes;
AVI->video_frames++;
return 0;
}
int AVI_dup_frame(avi_t *AVI)
{
if(AVI->mode==AVI_MODE_READ) { AVI_errno = AVI_ERR_NOT_PERM; return -1; }
if(AVI->last_pos==0) return 0; /* No previous real frame */
if(avi_add_index_entry(AVI,(unsigned char *)"00db",0x10,AVI->last_pos,AVI->last_len)) return -1;
AVI->video_frames++;
AVI->must_use_index = 1;
return 0;
}
int AVI_write_audio(avi_t *AVI, char *data, long bytes)
{
if(AVI->mode==AVI_MODE_READ) { AVI_errno = AVI_ERR_NOT_PERM; return -1; }
if( avi_write_data(AVI,data,bytes,1,0) ) return -1;
AVI->track[AVI->aptr].audio_bytes += bytes;
return 0;
}
int AVI_append_audio(avi_t *AVI, char *data, long bytes)
{
long i, length, pos;
unsigned char c[4];
if(AVI->mode==AVI_MODE_READ) { AVI_errno = AVI_ERR_NOT_PERM; return -1; }
// update last index entry:
--AVI->n_idx;
length = str2ulong(AVI->idx[AVI->n_idx]+12);
pos = str2ulong(AVI->idx[AVI->n_idx]+8);
//update;
long2str(AVI->idx[AVI->n_idx]+12,length+bytes);
++AVI->n_idx;
AVI->track[AVI->aptr].audio_bytes += bytes;