* mpeg_audio.c: parse MPEG audio sync info and packetize the stream
*****************************************************************************
* Copyright (C) 2001-2003 VideoLAN
- * $Id: mpeg_audio.c,v 1.19 2003/10/05 00:50:05 gbazin Exp $
+ * $Id: mpeg_audio.c,v 1.20 2003/10/23 20:51:20 gbazin Exp $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Eric Petit <titer@videolan.org>
* Input properties
*/
int i_state;
- vlc_bool_t b_synchro;
block_t *p_chain;
block_bytestream_t bytestream;
static int InitDecoder( decoder_t *p_dec )
{
p_dec->p_sys->i_state = STATE_NOSYNC;
- p_dec->p_sys->b_synchro = VLC_FALSE;
p_dec->p_sys->p_out_buffer = NULL;
aout_DateSet( &p_dec->p_sys->end_date, 0 );
uint8_t p_header[MAD_BUFFER_GUARD];
uint32_t i_header;
- if( (!aout_DateGet( &p_sys->end_date ) && !p_block->i_pts)
- || p_block->b_discontinuity )
+ if( !aout_DateGet( &p_sys->end_date ) && !p_block->i_pts )
{
/* We've just started the stream, wait for the first PTS. */
block_Release( p_block );
- p_sys->b_synchro = VLC_FALSE;
return VLC_SUCCESS;
}
+ if( p_block->b_discontinuity )
+ {
+ p_sys->i_state = STATE_SYNC;
+ }
+
if( p_sys->p_chain )
{
block_ChainAppend( &p_sys->p_chain, p_block );
break;
}
block_SkipByte( &p_sys->bytestream );
- p_sys->b_synchro = VLC_FALSE;
}
if( p_sys->i_state != STATE_SYNC )
{
+ if( block_PeekByte( &p_sys->bytestream, p_header )
+ == VLC_SUCCESS && p_header[0] == 0xff )
+ {
+ /* Start of a sync word, need more data */
+ return VLC_SUCCESS;
+ }
+
block_ChainRelease( p_sys->p_chain );
p_sys->p_chain = NULL;
if( p_sys->pts != 0 &&
p_sys->pts != aout_DateGet( &p_sys->end_date ) )
{
+ msg_Err( p_dec, "set PTS: %lli old: %lli", p_sys->pts,
+ aout_DateGet( &p_sys->end_date ) );
aout_DateSet( &p_sys->end_date, p_sys->pts );
}
p_sys->i_state = STATE_HEADER;
msg_Dbg( p_dec, "emulated start code" );
block_SkipByte( &p_sys->bytestream );
p_sys->i_state = STATE_NOSYNC;
- p_sys->b_synchro = VLC_FALSE;
break;
}
"(emulated startcode ?)" );
block_SkipByte( &p_sys->bytestream );
p_sys->i_state = STATE_NOSYNC;
- p_sys->b_synchro = VLC_FALSE;
break;
}
}
break;
}
- if( !p_sys->b_synchro )
- {
- msg_Dbg( p_dec, "emulated startcode "
- "(no startcode on following frame)" );
- p_sys->i_state = STATE_NOSYNC;
- block_SkipByte( &p_sys->bytestream );
- break;
- }
+ msg_Dbg( p_dec, "emulated startcode "
+ "(no startcode on following frame)" );
+ p_sys->i_state = STATE_NOSYNC;
+ block_SkipByte( &p_sys->bytestream );
+ break;
}
if( GetOutBuffer( p_dec, &p_sys->p_out_buffer ) != VLC_SUCCESS )
SendOutBuffer( p_dec );
p_sys->i_state = STATE_NOSYNC;
- p_sys->b_synchro = VLC_TRUE;
/* Make sure we don't reuse the same pts twice */
if( p_sys->pts == p_sys->bytestream.p_block->i_pts )
};
int i_version, i_mode, i_emphasis;
- vlc_bool_t b_padding, b_mpeg_2_5;
+ vlc_bool_t b_padding, b_mpeg_2_5, b_crc;
int i_frame_size = 0;
int i_bitrate_index, i_samplerate_index;
int i_max_bit_rate;
b_mpeg_2_5 = 1 - ((i_header & 0x100000) >> 20);
i_version = 1 - ((i_header & 0x80000) >> 19);
*pi_layer = 4 - ((i_header & 0x60000) >> 17);
- /* CRC */
+ b_crc = !((i_header >> 16) & 0x01);
i_bitrate_index = (i_header & 0xf000) >> 12;
i_samplerate_index = (i_header & 0xc00) >> 10;
b_padding = (i_header & 0x200) >> 9;