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simplify

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Originally committed as revision 5374 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2006-05-13 18:45:29 +00:00
parent 039627cf48
commit 08db8f1846
1 changed files with 9 additions and 45 deletions
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54
libavformat/movenc.c
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@ -226,54 +226,18 @@ static int mov_write_damr_tag(ByteIOContext *pb)
static unsigned int descrLength(unsigned int len)
{
if (len < 0x00000080)
return 2 + len;
else if (len < 0x00004000)
return 3 + len;
else if(len < 0x00200000)
return 4 + len;
else
return 5 + len;
int i;
for(i=1; len>>(7*i); i++);
return len + 1 + i;
}
static void putDescr(ByteIOContext *pb, int tag, int size)
static void putDescr(ByteIOContext *pb, int tag, unsigned int size)
{
uint32_t len;
uint8_t vals[4];
len = size;
vals[3] = (uint8_t)(len & 0x7f);
len >>= 7;
vals[2] = (uint8_t)((len & 0x7f) | 0x80);
len >>= 7;
vals[1] = (uint8_t)((len & 0x7f) | 0x80);
len >>= 7;
vals[0] = (uint8_t)((len & 0x7f) | 0x80);
put_byte(pb, tag); // DescriptorTag
if (size < 0x00000080)
{
put_byte(pb, vals[3]);
}
else if (size < 0x00004000)
{
put_byte(pb, vals[2]);
put_byte(pb, vals[3]);
}
else if (size < 0x00200000)
{
put_byte(pb, vals[1]);
put_byte(pb, vals[2]);
put_byte(pb, vals[3]);
}
else if (size < 0x10000000)
{
put_byte(pb, vals[0]);
put_byte(pb, vals[1]);
put_byte(pb, vals[2]);
put_byte(pb, vals[3]);
}
int i= descrLength(size) - size - 2;
put_byte(pb, tag);
for(; i>0; i--)
put_byte(pb, (size>>(7*i)) | 0x80);
put_byte(pb, size & 0x7F);
}
static int mov_write_esds_tag(ByteIOContext *pb, MOVTrack* track) // Basic