/*****************************************************************************
* a52.c : raw A/52 stream input module for vlc
*****************************************************************************
- * Copyright (C) 2001 VideoLAN
- * $Id: a52.c,v 1.4 2004/02/13 22:37:35 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
*****************************************************************************/
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
#include <vlc/vlc.h>
-#include <vlc/input.h>
+#include <vlc_plugin.h>
+#include <vlc_demux.h>
#include <vlc_codec.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
-#define PCM_FRAME_SIZE (1536 * 4)
-#define A52_PACKET_SIZE (4 * PCM_FRAME_SIZE)
-#define A52_MAX_HEADER_SIZE 10
-
/*****************************************************************************
- * Local prototypes
+ * Module descriptor
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close ( vlc_object_t * );
-static int Demux ( input_thread_t * );
-static int Control( input_thread_t *, int, va_list );
+vlc_module_begin();
+ set_category( CAT_INPUT );
+ set_subcategory( SUBCAT_INPUT_DEMUX );
+ set_description( N_("Raw A/52 demuxer") );
+ set_capability( "demux", 145 );
+ set_callbacks( Open, Close );
+ add_shortcut( "a52" );
+vlc_module_end();
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int Demux ( demux_t * );
+static int Control( demux_t *, int, va_list );
struct demux_sys_t
{
- vlc_bool_t b_start;
+ bool b_start;
es_out_id_t *p_es;
/* Packetizer */
decoder_t *p_packetizer;
int i_mux_rate;
- vlc_bool_t b_big_endian;
+ bool b_big_endian;
};
-/*****************************************************************************
- * Module descriptor
- *****************************************************************************/
-vlc_module_begin();
- set_description( _("Raw A/52 demuxer") );
- set_capability( "demux", 145 );
- set_callbacks( Open, Close );
- add_shortcut( "a52" );
-vlc_module_end();
+static int CheckSync( const uint8_t *p_peek, bool *p_big_endian );
-/*****************************************************************************
- * CheckSync: Check if buffer starts with an A52 sync code
- *****************************************************************************/
-int CheckSync( uint8_t *p_peek, vlc_bool_t *p_big_endian )
-{
- /* Little endian version of the bitstream */
- if( p_peek[0] == 0x77 && p_peek[1] == 0x0b &&
- p_peek[4] < 0x60 /* bsid < 12 */ )
- {
- *p_big_endian = VLC_FALSE;
- return VLC_SUCCESS;
- }
- /* Big endian version of the bitstream */
- else if( p_peek[0] == 0x0b && p_peek[1] == 0x77 &&
- p_peek[5] < 0x60 /* bsid < 12 */ )
- {
- *p_big_endian = VLC_TRUE;
- return VLC_SUCCESS;
- }
+#define PCM_FRAME_SIZE (1536 * 4)
+#define A52_PACKET_SIZE (4 * PCM_FRAME_SIZE)
+#define A52_MAX_HEADER_SIZE 10
- return VLC_EGENERIC;
-}
/*****************************************************************************
* 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;
- vlc_bool_t b_big_endian;
-
- p_input->pf_demux = Demux;
- p_input->pf_demux_control = Control;
- p_input->pf_rewind = NULL;
+ demux_t *p_demux = (demux_t*)p_this;
+ demux_sys_t *p_sys;
+ const uint8_t *p_peek;
+ int i_peek = 0;
+ bool b_big_endian = 0; /* Arbitrary initialisation */
/* 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, 12 ) == 12 &&
+ !memcmp( p_peek, "RIFF", 4 ) && !memcmp( p_peek + 8, "WAVE", 4 ) )
{
int i_size;
/* 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 ) )
+ while( stream_Peek( p_demux->s, &p_peek, i_peek ) == i_peek &&
+ memcmp( p_peek + i_peek - 8, "data", 4 ) )
{
i_peek += GetDWLE( p_peek + i_peek - 4 ) + 8;
}
/* Some A52 wav files don't begin with a sync code so we do a more
* extensive search */
- i_size = input_Peek( p_input, &p_peek, i_peek + A52_PACKET_SIZE * 2);
+ i_size = stream_Peek( p_demux->s, &p_peek, i_peek + A52_PACKET_SIZE * 2);
i_size -= (PCM_FRAME_SIZE + A52_MAX_HEADER_SIZE);
while( i_peek < i_size )
}
/* Have a peep at the show. */
- if( input_Peek( p_input, &p_peek, i_peek + A52_MAX_HEADER_SIZE * 2 ) <
- i_peek + A52_MAX_HEADER_SIZE * 2 )
- {
- /* Stream too short */
- msg_Warn( p_input, "cannot peek()" );
- return VLC_EGENERIC;
- }
+ CHECK_PEEK( p_peek, i_peek + A52_MAX_HEADER_SIZE * 2 );
if( CheckSync( p_peek + i_peek, &b_big_endian ) != VLC_SUCCESS )
{
- if( p_input->psz_demux && !strncmp( p_input->psz_demux, "a52", 3 ) )
- {
- /* User forced */
- msg_Err( p_input, "this doesn't look like a A52 audio stream, "
- "continuing anyway" );
- }
- else
- {
+ if( !p_demux->b_force )
return VLC_EGENERIC;
- }
+
+ /* User forced */
+ msg_Err( p_demux, "this doesn't look like a A52 audio stream, "
+ "continuing anyway" );
}
- p_input->p_demux_data = p_sys = malloc( sizeof( demux_sys_t ) );
- p_sys->b_start = VLC_TRUE;
+ /* Fill p_demux fields */
+ DEMUX_INIT_COMMON(); p_sys = p_demux->p_sys;
+ p_sys->b_start = true;
p_sys->i_mux_rate = 0;
p_sys->b_big_endian = b_big_endian;
- /*
- * Load the A52 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( 'a', '5', '2', ' ' ) );
-
- 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 A52 packetizer" );
- return VLC_EGENERIC;
- }
+ /* Load the A52 packetizer */
+ INIT_APACKETIZER( p_sys->p_packetizer, 'a', '5', '2', ' ' );
+ LOAD_PACKETIZER_OR_FAIL( p_sys->p_packetizer, "A52" );
/* Create one program */
- vlc_mutex_lock( &p_input->stream.stream_lock );
- if( input_InitStream( p_input, 0 ) == -1 )
- {
- vlc_mutex_unlock( &p_input->stream.stream_lock );
- msg_Err( p_input, "cannot init stream" );
- return VLC_EGENERIC;
- }
- 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 );
+ p_sys->p_es = es_out_Add( p_demux->out, &p_sys->p_packetizer->fmt_in );
return VLC_SUCCESS;
}
*****************************************************************************/
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;
-
- /* Unneed module */
- module_Unneed( p_sys->p_packetizer, p_sys->p_packetizer->p_module );
-
- /* Delete the decoder */
- vlc_object_destroy( p_sys->p_packetizer );
+ demux_t *p_demux = (demux_t*)p_this;
+ demux_sys_t *p_sys = p_demux->p_sys;
+ 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;
- block_t *p_block_in, *p_block_out;
+ demux_sys_t *p_sys = p_demux->p_sys;
+ block_t *p_block_in, *p_block_out;
/* Align stream */
- int64_t i_pos = stream_Tell( p_input->s );
- if( i_pos % 2 ) stream_Read( p_input->s, NULL, 1 );
+ int64_t i_pos = stream_Tell( p_demux->s );
+ if( i_pos % 2 ) stream_Read( p_demux->s, NULL, 1 );
- if( !( p_block_in = stream_Block( p_input->s, A52_PACKET_SIZE ) ) )
+ if( !( p_block_in = stream_Block( p_demux->s, A52_PACKET_SIZE ) ) )
{
return 0;
}
#else
int i;
- byte_t *p_tmp, tmp;
+ uint8_t *p_tmp, tmp;
p_tmp = p_block_in->p_buffer;
for( i = p_block_in->i_buffer / 2 ; i-- ; )
{
while( (p_block_out = p_sys->p_packetizer->pf_packetize(
p_sys->p_packetizer, &p_block_in )) )
{
- p_sys->b_start = VLC_FALSE;
+ p_sys->b_start = false;
while( p_block_out )
{
/* 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_input->stream.i_mux_rate = p_sys->i_mux_rate / 50;
-
- input_ClockManageRef( p_input,
- p_input->stream.p_selected_program,
- p_block_out->i_pts * 9 / 100 );
+ {
+ p_sys->i_mux_rate =
+ p_block_out->i_buffer * INT64_C(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;
}
/*****************************************************************************
* Control:
*****************************************************************************/
-static int Control( input_thread_t *p_input, int i_query, va_list args )
+static int Control( demux_t *p_demux, int i_query, va_list args )
{
- demux_sys_t *p_sys = (demux_sys_t *)p_input->p_demux_data;
- int64_t *pi64;
-
- switch( i_query )
+ demux_sys_t *p_sys = p_demux->p_sys;
+ if( i_query == DEMUX_SET_TIME )
{
- case DEMUX_GET_TIME:
- pi64 = (int64_t*)va_arg( args, int64_t * );
- if( p_sys->i_mux_rate > 0 )
- {
- *pi64 = I64C(1000000) * stream_Tell( p_input->s ) /
- p_sys->i_mux_rate;
- return VLC_SUCCESS;
- }
- *pi64 = 0;
- return VLC_EGENERIC;
-
- case DEMUX_GET_LENGTH:
- pi64 = (int64_t*)va_arg( args, int64_t * );
- if( p_sys->i_mux_rate > 0 )
- {
- *pi64 = I64C(1000000) * stream_Size( p_input->s ) /
- p_sys->i_mux_rate;
- return VLC_SUCCESS;
- }
- *pi64 = 0;
- return VLC_EGENERIC;
+ return VLC_EGENERIC;
+ }
+ else if( i_query == DEMUX_HAS_UNSUPPORTED_META )
+ {
+ bool *pb_bool = (bool*)va_arg( args, bool* );
+ *pb_bool = true;
+ return VLC_SUCCESS;
+ }
+ else
+ {
+ return demux_vaControlHelper( p_demux->s,
+ 0, -1,
+ 8*p_sys->i_mux_rate, 1, i_query, args );
+ }
+}
- default:
- return demux_vaControlDefault( p_input, i_query, args );
+/*****************************************************************************
+ * CheckSync: Check if buffer starts with an A52 sync code
+ *****************************************************************************/
+static int CheckSync( const uint8_t *p_peek, bool *p_big_endian )
+{
+ /* Little endian version of the bitstream */
+ if( p_peek[0] == 0x77 && p_peek[1] == 0x0b &&
+ p_peek[4] < 0x60 /* bsid < 12 */ )
+ {
+ *p_big_endian = false;
+ return VLC_SUCCESS;
+ }
+ /* Big endian version of the bitstream */
+ else if( p_peek[0] == 0x0b && p_peek[1] == 0x77 &&
+ p_peek[5] < 0x60 /* bsid < 12 */ )
+ {
+ *p_big_endian = true;
+ return VLC_SUCCESS;
}
+
+ return VLC_EGENERIC;
}
+
+
projects / vlc / blobdiff