/*****************************************************************************
* dts.c : raw DTS stream input module for vlc
*****************************************************************************
- * Copyright (C) 2001 VideoLAN
- * $Id: dts.c,v 1.3 2004/02/03 08:16:16 gbazin Exp $
+ * Copyright (C) 2001-2007 the VideoLAN team
+ * $Id$
*
* Authors: Gildas Bazin <gbazin@netcourrier.com>
*
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <vlc/vlc.h>
-#include <vlc/input.h>
+#include <vlc_demux.h>
#include <vlc_codec.h>
-#define DTS_PACKET_SIZE 16384
-#define DTS_MAX_HEADER_SIZE 11
-
/*****************************************************************************
- * Local prototypes
+ * Module descriptor
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close ( vlc_object_t * );
-static int Demux ( input_thread_t * );
+
+vlc_module_begin();
+ set_category( CAT_INPUT );
+ set_subcategory( SUBCAT_INPUT_DEMUX );
+ set_description( _("Raw DTS demuxer") );
+ set_capability( "demux2", 155 );
+ set_callbacks( Open, Close );
+ add_shortcut( "dts" );
+vlc_module_end();
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int Demux ( demux_t * );
+static int Control( demux_t *, int, va_list );
struct demux_sys_t
{
/* Packetizer */
decoder_t *p_packetizer;
+
+ int i_mux_rate;
};
-/*****************************************************************************
- * Module descriptor
- *****************************************************************************/
-vlc_module_begin();
- set_description( _("Raw DTS demuxer") );
- set_capability( "demux", 155 );
- set_callbacks( Open, Close );
- add_shortcut( "dts" );
-vlc_module_end();
+static int CheckSync( const uint8_t *p_peek );
+
+#define DTS_PACKET_SIZE 16384
+#define DTS_PROBE_SIZE (DTS_PACKET_SIZE * 4)
+#define DTS_MAX_HEADER_SIZE 11
/*****************************************************************************
* Open: initializes ES structures
*****************************************************************************/
static int Open( vlc_object_t * p_this )
{
- input_thread_t *p_input = (input_thread_t *)p_this;
- demux_sys_t *p_sys;
- byte_t * p_peek;
- int i_peek = 0;
-
- p_input->pf_demux = Demux;
- p_input->pf_demux_control = demux_vaControlDefault;
- p_input->pf_rewind = NULL;
+ demux_t *p_demux = (demux_t*)p_this;
+ demux_sys_t *p_sys;
+ const byte_t *p_peek;
+ int i_peek = 0;
/* Check if we are dealing with a WAV file */
- if( input_Peek( p_input, &p_peek, 12 ) == 12 &&
- !strncmp( p_peek, "RIFF", 4 ) && !strncmp( &p_peek[8], "WAVE", 4 ) )
+ if( stream_Peek( p_demux->s, &p_peek, 20 ) == 20 &&
+ !memcmp( p_peek, "RIFF", 4 ) && !memcmp( &p_peek[8], "WAVE", 4 ) )
{
- /* Skip the wave header */
- i_peek = 12 + 8;
- while( input_Peek( p_input, &p_peek, i_peek ) == i_peek &&
- strncmp( p_peek + i_peek - 8, "data", 4 ) )
+ int i_size;
+
+ /* Find the wave format header */
+ i_peek = 20;
+ while( memcmp( p_peek + i_peek - 8, "fmt ", 4 ) )
{
- i_peek += GetDWLE( p_peek + i_peek - 4 ) + 8;
+ i_size = GetDWLE( p_peek + i_peek - 4 );
+ if( i_size + i_peek > DTS_PROBE_SIZE ) return VLC_EGENERIC;
+ i_peek += i_size + 8;
+
+ if( stream_Peek( p_demux->s, &p_peek, i_peek ) != i_peek )
+ return VLC_EGENERIC;
}
- }
- /* Have a peep at the show. */
- if( input_Peek( p_input, &p_peek, i_peek + DTS_MAX_HEADER_SIZE ) <
- i_peek + DTS_MAX_HEADER_SIZE )
- {
- /* Stream too short */
- msg_Err( p_input, "cannot peek()" );
- return VLC_EGENERIC;
- }
+ /* Sanity check the wave format header */
+ i_size = GetDWLE( p_peek + i_peek - 4 );
+ if( i_size + i_peek > DTS_PROBE_SIZE ) return VLC_EGENERIC;
+ i_peek += i_size + 8;
+ if( stream_Peek( p_demux->s, &p_peek, i_peek ) != i_peek )
+ return VLC_EGENERIC;
+ if( GetWLE( p_peek + i_peek - i_size - 8 /* wFormatTag */ ) !=
+ 1 /* WAVE_FORMAT_PCM */ )
+ return VLC_EGENERIC;
+ if( GetWLE( p_peek + i_peek - i_size - 6 /* nChannels */ ) != 2 )
+ return VLC_EGENERIC;
+ if( GetDWLE( p_peek + i_peek - i_size - 4 /* nSamplesPerSec */ ) !=
+ 44100 )
+ return VLC_EGENERIC;
- /* 14 bits, little endian version of the bitstream */
- if( p_peek[i_peek + 0] == 0xff && p_peek[i_peek + 1] == 0x1f &&
- p_peek[i_peek + 2] == 0x00 && p_peek[i_peek + 3] == 0xe8 &&
- (p_peek[i_peek + 4] & 0xf0) == 0xf0 && p_peek[i_peek + 5] == 0x07 )
- {
- }
- /* 14 bits, big endian version of the bitstream */
- else if( p_peek[i_peek + 0] == 0x1f && p_peek[i_peek + 1] == 0xff &&
- p_peek[i_peek + 2] == 0xe8 && p_peek[i_peek + 3] == 0x00 &&
- p_peek[i_peek + 4] == 0x07 && (p_peek[i_peek + 5] & 0xf0) == 0xf0)
- {
- }
- /* 16 bits, big endian version of the bitstream */
- else if( p_peek[i_peek + 0] == 0x7f && p_peek[i_peek + 1] == 0xfe &&
- p_peek[i_peek + 2] == 0x80 && p_peek[i_peek + 3] == 0x01 )
- {
- }
- /* 16 bits, little endian version of the bitstream */
- else if( p_peek[i_peek + 0] == 0xfe && p_peek[i_peek + 1] == 0x7f &&
- p_peek[i_peek + 2] == 0x01 && p_peek[i_peek + 3] == 0x80 )
- {
- }
- else
- {
- if( p_input->psz_demux && !strncmp( p_input->psz_demux, "dts", 3 ) )
+ /* Skip the wave header */
+ while( memcmp( p_peek + i_peek - 8, "data", 4 ) )
{
- /* User forced */
- msg_Err( p_input, "this doesn't look like a DTS audio stream, "
- "continuing anyway" );
+ i_size = GetDWLE( p_peek + i_peek - 4 );
+ if( i_size + i_peek > DTS_PROBE_SIZE ) return VLC_EGENERIC;
+ i_peek += i_size + 8;
+
+ if( stream_Peek( p_demux->s, &p_peek, i_peek ) != i_peek )
+ return VLC_EGENERIC;
}
- else
+
+ /* Some DTS wav files don't begin with a sync code so we do a more
+ * extensive search */
+ i_size = stream_Peek( p_demux->s, &p_peek, DTS_PROBE_SIZE );
+ i_size -= DTS_MAX_HEADER_SIZE;
+
+ while( i_peek < i_size )
{
- return VLC_EGENERIC;
+ if( CheckSync( p_peek + i_peek ) != VLC_SUCCESS )
+ /* The data is stored in 16 bits words */
+ i_peek += 2;
+ else
+ break;
}
}
- p_input->p_demux_data = p_sys = malloc( sizeof( demux_sys_t ) );
- p_sys->b_start = VLC_TRUE;
-
- /*
- * Load the DTS packetizer
- */
- p_sys->p_packetizer = vlc_object_create( p_input, VLC_OBJECT_DECODER );
- p_sys->p_packetizer->pf_decode_audio = 0;
- p_sys->p_packetizer->pf_decode_video = 0;
- p_sys->p_packetizer->pf_decode_sub = 0;
- p_sys->p_packetizer->pf_packetize = 0;
-
- /* Initialization of decoder structure */
- es_format_Init( &p_sys->p_packetizer->fmt_in, AUDIO_ES,
- VLC_FOURCC( 'd', 't', 's', ' ' ) );
-
- p_sys->p_packetizer->p_module =
- module_Need( p_sys->p_packetizer, "packetizer", NULL );
- if( !p_sys->p_packetizer->p_module )
- {
- msg_Err( p_input, "cannot find DTS packetizer" );
- return VLC_EGENERIC;
- }
+ /* Have a peep at the show. */
+ CHECK_PEEK( p_peek, i_peek + DTS_MAX_HEADER_SIZE * 2 );
- /* Create one program */
- vlc_mutex_lock( &p_input->stream.stream_lock );
- if( input_InitStream( p_input, 0 ) == -1 )
+ if( CheckSync( p_peek + i_peek ) != VLC_SUCCESS )
{
- vlc_mutex_unlock( &p_input->stream.stream_lock );
- msg_Err( p_input, "cannot init stream" );
- return VLC_EGENERIC;
+ if( strncmp( p_demux->psz_demux, "dts", 3 ) )
+ {
+ return VLC_EGENERIC;
+ }
+ /* User forced */
+ msg_Err( p_demux, "this doesn't look like a DTS audio stream, "
+ "continuing anyway" );
}
- p_input->stream.i_mux_rate = 0;
- vlc_mutex_unlock( &p_input->stream.stream_lock );
- p_sys->p_es =
- es_out_Add( p_input->p_es_out, &p_sys->p_packetizer->fmt_in );
+ STANDARD_DEMUX_INIT; p_sys = p_demux->p_sys;
+
+ INIT_APACKETIZER( p_sys->p_packetizer, 'd','t','s',' ' );
+ LOAD_PACKETIZER_OR_FAIL( p_sys->p_packetizer, "DTS" );
+
+ p_sys->p_es = es_out_Add( p_demux->out, &p_sys->p_packetizer->fmt_in );
return VLC_SUCCESS;
}
/*****************************************************************************
* Close: frees unused data
*****************************************************************************/
-static void Close( vlc_object_t * p_this )
+static void Close( vlc_object_t *p_this )
{
- input_thread_t *p_input = (input_thread_t*)p_this;
- demux_sys_t *p_sys = p_input->p_demux_data;
+ demux_t *p_demux = (demux_t*)p_this;
+ demux_sys_t *p_sys = p_demux->p_sys;
- /* Unneed module */
- module_Unneed( p_sys->p_packetizer, p_sys->p_packetizer->p_module );
-
- /* Delete the decoder */
- vlc_object_destroy( p_sys->p_packetizer );
+ DESTROY_PACKETIZER( p_sys->p_packetizer );
free( p_sys );
}
*****************************************************************************
* Returns -1 in case of error, 0 in case of EOF, 1 otherwise
*****************************************************************************/
-static int Demux( input_thread_t * p_input )
+static int Demux( demux_t *p_demux )
{
- demux_sys_t *p_sys = p_input->p_demux_data;
+ demux_sys_t *p_sys = p_demux->p_sys;
block_t *p_block_in, *p_block_out;
- if( !( p_block_in = stream_Block( p_input->s, DTS_PACKET_SIZE ) ) )
+ if( !( p_block_in = stream_Block( p_demux->s, DTS_PACKET_SIZE ) ) )
{
return 0;
}
if( p_sys->b_start )
- {
p_block_in->i_pts = p_block_in->i_dts = 1;
- p_sys->b_start = VLC_FALSE;
- }
else
- {
p_block_in->i_pts = p_block_in->i_dts = 0;
- }
while( (p_block_out = p_sys->p_packetizer->pf_packetize(
p_sys->p_packetizer, &p_block_in )) )
{
+ p_sys->b_start = VLC_FALSE;
+
while( p_block_out )
{
block_t *p_next = p_block_out->p_next;
- input_ClockManageRef( p_input,
- p_input->stream.p_selected_program,
- p_block_out->i_pts * 9 / 100 );
+ /* We assume a constant bitrate */
+ if( p_block_out->i_length )
+ {
+ p_sys->i_mux_rate =
+ p_block_out->i_buffer * I64C(1000000) / p_block_out->i_length;
+ }
- p_block_in->b_discontinuity = 0;
- p_block_out->i_dts = p_block_out->i_pts =
- input_ClockGetTS( p_input, p_input->stream.p_selected_program,
- p_block_out->i_pts * 9 / 100 );
+ /* set PCR */
+ es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block_out->i_dts );
- es_out_Send( p_input->p_es_out, p_sys->p_es, p_block_out );
+ es_out_Send( p_demux->out, p_sys->p_es, p_block_out );
p_block_out = p_next;
}
return 1;
}
+
+/*****************************************************************************
+ * Control:
+ *****************************************************************************/
+static int Control( demux_t *p_demux, int i_query, va_list args )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+ if( i_query == DEMUX_SET_TIME )
+ return VLC_EGENERIC;
+ else
+ return demux2_vaControlHelper( p_demux->s,
+ 0, -1,
+ 8*p_sys->i_mux_rate, 1, i_query, args );
+}
+
+/*****************************************************************************
+ * CheckSync: Check if buffer starts with a DTS sync code
+ *****************************************************************************/
+static int CheckSync( const uint8_t *p_peek )
+{
+ /* 14 bits, little endian version of the bitstream */
+ if( p_peek[0] == 0xff && p_peek[1] == 0x1f &&
+ p_peek[2] == 0x00 && p_peek[3] == 0xe8 &&
+ (p_peek[4] & 0xf0) == 0xf0 && p_peek[5] == 0x07 )
+ {
+ return VLC_SUCCESS;
+ }
+ /* 14 bits, big endian version of the bitstream */
+ else if( p_peek[0] == 0x1f && p_peek[1] == 0xff &&
+ p_peek[2] == 0xe8 && p_peek[3] == 0x00 &&
+ p_peek[4] == 0x07 && (p_peek[5] & 0xf0) == 0xf0)
+ {
+ return VLC_SUCCESS;
+ }
+ /* 16 bits, big endian version of the bitstream */
+ else if( p_peek[0] == 0x7f && p_peek[1] == 0xfe &&
+ p_peek[2] == 0x80 && p_peek[3] == 0x01 )
+ {
+ return VLC_SUCCESS;
+ }
+ /* 16 bits, little endian version of the bitstream */
+ else if( p_peek[0] == 0xfe && p_peek[1] == 0x7f &&
+ p_peek[2] == 0x01 && p_peek[3] == 0x80 )
+ {
+ return VLC_SUCCESS;
+ }
+
+ return VLC_EGENERIC;
+}
+
projects / vlc / blobdiff