static ssize_t Read( stream_t *p_stream, void *p_buf, size_t i_toread )
{
stream_sys_t *p_sys = p_stream->p_sys;
uint8_t *p_dst = p_buf;
int i_total_read = 0;
int i_ret;
if ( !i_toread )
return -1;
/* Use data from previous reads */
size_t i_fromremain = RemainRead( p_stream, p_dst, i_toread );
i_total_read += i_fromremain;
p_dst += i_fromremain;
i_toread -= i_fromremain;
while ( i_toread )
{
/* make use of the existing buffer, overwritten by decoder data later */
int i_srcread = vlc_stream_Read( p_stream->s, p_dst, i_toread );
if ( i_srcread > 0 )
{
ARIB_STD_B25_BUFFER putbuf = { p_dst, i_srcread };
i_ret = p_sys->p_b25->put( p_sys->p_b25, &putbuf );
if ( i_ret < 0 )
{
msg_Err( p_stream, "decoder put failed: %s",
GetErrorMessage( i_ret, b25_errors ) );
return 0;
}
}
else
{
if ( i_srcread < 0 )
msg_Err( p_stream, "Can't read %lu bytes from source stream: %d", i_toread, i_srcread );
return 0;
}
ARIB_STD_B25_BUFFER getbuf;
i_ret = p_sys->p_b25->get( p_sys->p_b25, &getbuf );
if ( i_ret < 0 )
{
msg_Err( p_stream, "decoder get failed: %s",
GetErrorMessage( i_ret, b25_errors ) );
return 0;
}
if ( (size_t)getbuf.size > i_toread )
{
/* Hold remaining data for next call */
RemainAdd( p_stream, getbuf.data + i_toread, getbuf.size - i_toread );
}
int consume = __MIN( (size_t)getbuf.size, i_toread );
memcpy( p_dst, getbuf.data, consume );
i_total_read += consume;
p_dst += consume;
i_toread -= consume;
}
return i_total_read;
}
static int DecoderRead( stream_t *p_stream, uint8_t *p_dst, int i_toread )
{
stream_sys_t *p_sys = p_stream->p_sys;
ARIB_STD_B25_BUFFER getbuf = { NULL, 0 };
int i_total_read = 0;
int i_ret;
if ( !p_dst || ! i_toread )
return -1;
/* Use data from previous reads */
size_t i_fromremain = RemainRead( p_stream, p_dst, i_toread );
i_toread -= i_fromremain;
i_total_read += i_fromremain;
while( i_toread )
{
do
{
getbuf.size = 0;
i_ret = p_sys->p_b25->get( p_sys->p_b25, &getbuf );
if ( i_ret < 0 )
msg_Err( p_stream, "decoder get failed: %s",
GetErrorMessage( i_ret, b25_errors ) );
/* If the decoders needs buffering or data is not ready, push some */
if ( i_ret == 0 && getbuf.size == 0 )
{
/* make use of the existing buffer,
overwritten by decoder data later */
int i_srcread = stream_Read( p_stream->p_source, p_dst, i_toread );
if ( i_srcread > 0 )
{
ARIB_STD_B25_BUFFER putbuf = { p_dst, i_srcread };
i_ret = p_sys->p_b25->put( p_sys->p_b25, &putbuf );
if ( i_ret < 0 )
msg_Err( p_stream, "decoder put failed: %s",
GetErrorMessage( i_ret, b25_errors ) );
}
else
{
if ( i_srcread < 0 )
msg_Err( p_stream, "Can't read %d bytes from source stream: %d", i_toread, i_srcread );
i_ret = -1;
}
}
}
while ( i_ret == 0 && getbuf.size == 0 );
if ( i_ret < 0 )
return -1;
memcpy( p_dst, getbuf.data, __MIN(getbuf.size, i_toread) );
if ( getbuf.size > i_toread )
{
/* Hold remaining data for next call */
RemainAdd( p_stream, getbuf.data + i_toread, getbuf.size - i_toread );
}
i_total_read += __MIN(getbuf.size, i_toread);
p_dst += __MIN(getbuf.size, i_toread);
i_toread -= __MIN(getbuf.size, i_toread);
}
return i_total_read;
}
