* au.c : au file input module for vlc
*****************************************************************************
* Copyright (C) 2001-2003 VideoLAN
- * $Id: au.c,v 1.12 2004/01/25 20:05:28 hartman Exp $
+ * $Id: au.c,v 1.13 2004/01/29 15:11:17 fenrir Exp $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
#include <vlc/vlc.h>
#include <vlc/input.h>
-#include <codecs.h>
+/* TODO:
+ * - all adpcm things (I _NEED_ samples)
+ * - ...
+ */
/*****************************************************************************
* Module descriptor
*****************************************************************************/
-static int Open ( vlc_object_t * );
-static void Close ( vlc_object_t * );
+static int Open ( vlc_object_t * );
+static void Close( vlc_object_t * );
vlc_module_begin();
set_description( _("AU demuxer") );
- set_capability( "demux", 142 );
+ set_capability( "demux2", 10 );
set_callbacks( Open, Close );
+ add_shortcut( "au" );
vlc_module_end();
-/*
- * TODO:
- * - all adpcm things (I _NEED_ samples)
- */
-
/*****************************************************************************
* Local prototypes
*****************************************************************************/
-static int DemuxPCM ( input_thread_t * );
-/* TODO static int DemuxADPCM ( input_thread_t * ); */
-
enum AuType_e
{
AU_UNKNOWN = 0,
AU_CAT_ADPCM = 2
};
-typedef struct
-#ifdef HAVE_ATTRIBUTE_PACKED
- __attribute__((__packed__))
-#endif
-{
- uint32_t i_header_size;
- uint32_t i_data_size;
- uint32_t i_encoding;
- uint32_t i_sample_rate;
- uint32_t i_channels;
-} au_t;
-
struct demux_sys_t
{
- au_t au;
+ es_format_t fmt;
+ es_out_id_t *es;
mtime_t i_time;
- es_format_t fmt;
- es_out_id_t *p_es;
-
int i_frame_size;
mtime_t i_frame_length;
+
+ int i_header_size;
};
+static int DemuxPCM( demux_t * );
+static int Control ( demux_t *, int i_query, va_list args );
/*****************************************************************************
* Open: check file and initializes structures
*****************************************************************************/
-static int Open( vlc_object_t * p_this )
+static int Open( vlc_object_t *p_this )
{
- input_thread_t *p_input = (input_thread_t *)p_this;
- demux_sys_t *p_sys;
-
- uint8_t *p_peek;
+ demux_t *p_demux = (demux_t*)p_this;
+ demux_sys_t *p_sys;
- int i_cat;
+ uint8_t hdr[20];
+ uint8_t *p_peek;
+ int i_cat;
+ int i_samples, i_modulo;
- /* a little test to see if it's a au file */
- if( input_Peek( p_input, &p_peek, 4 ) < 4 )
+ if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 )
{
- msg_Warn( p_input, "AU module discarded (cannot peek)" );
+ msg_Warn( p_demux, "cannot peek" );
return VLC_EGENERIC;
}
if( strncmp( p_peek, ".snd", 4 ) )
{
- msg_Warn( p_input, "AU module discarded (not a valid file)" );
+ msg_Warn( p_demux, "AU module discarded" );
return VLC_EGENERIC;
}
- p_input->p_demux_data = p_sys = malloc( sizeof( demux_sys_t ) );
- p_sys->i_time = 0;
-
/* skip signature */
- stream_Read( p_input->s, NULL, 4 ); /* cannot fail */
+ stream_Read( p_demux->s, NULL, 4 ); /* cannot fail */
/* read header */
- if( stream_Read( p_input->s, &p_sys->au, sizeof(au_t) )<(int)sizeof(au_t) )
+ if( stream_Read( p_demux->s, hdr, 20 ) < 20 )
{
- msg_Err( p_input, "cannot load header" );
- goto error;
+ msg_Err( p_demux, "cannot read" );
+ return VLC_EGENERIC;
}
- p_sys->au.i_header_size = GetDWBE( &p_sys->au.i_header_size );
- p_sys->au.i_data_size = GetDWBE( &p_sys->au.i_data_size );
- p_sys->au.i_encoding = GetDWBE( &p_sys->au.i_encoding );
- p_sys->au.i_sample_rate = GetDWBE( &p_sys->au.i_sample_rate );
- p_sys->au.i_channels = GetDWBE( &p_sys->au.i_channels );
-
- msg_Dbg( p_input,
- "au file: header_size=%d data_size=%d encoding=0x%x sample_rate=%d channels=%d",
- p_sys->au.i_header_size,
- p_sys->au.i_data_size,
- p_sys->au.i_encoding,
- p_sys->au.i_sample_rate,
- p_sys->au.i_channels );
- if( p_sys->au.i_header_size < 24 )
+ if( GetDWBE( &hdr[0] ) < 24 )
{
- msg_Warn( p_input, "AU module discarded (not a valid file)" );
- goto error;
+ msg_Err( p_demux, "invalid file" );
+ return VLC_EGENERIC;
}
+ p_sys = p_demux->p_sys = malloc( sizeof( demux_sys_t ) );
+ p_sys->i_time = 0;
+ p_sys->i_header_size = GetDWBE( &hdr[0] );
+
/* skip extra header data */
- if( p_sys->au.i_header_size > 4 + sizeof( au_t ) )
+ if( p_sys->i_header_size > 24 )
{
- stream_Read( p_input->s,
- NULL, p_sys->au.i_header_size - 4 - sizeof( au_t ) );
+ stream_Read( p_demux->s, NULL, p_sys->i_header_size - 24 );
}
- /* Create WAVEFORMATEX structure */
+ /* init fmt */
es_format_Init( &p_sys->fmt, AUDIO_ES, 0 );
- p_sys->fmt.audio.i_channels = p_sys->au.i_channels;
- p_sys->fmt.audio.i_rate = p_sys->au.i_sample_rate;
- switch( p_sys->au.i_encoding )
+ p_sys->fmt.audio.i_rate = GetDWBE( &hdr[12] );
+ p_sys->fmt.audio.i_channels = GetDWBE( &hdr[16] );
+
+#if 0
+ p_sys->au.i_header_size = GetDWBE( &p_sys->au.i_header_size );
+ p_sys->au.i_data_size = GetDWBE( &p_sys->au.i_data_size );
+ p_sys->au.i_encoding = GetDWBE( &p_sys->au.i_encoding );
+ p_sys->au.i_sample_rate = GetDWBE( &p_sys->au.i_sample_rate );
+ p_sys->au.i_channels = GetDWBE( &p_sys->au.i_channels );
+#endif
+ switch( GetDWBE( &hdr[8] ) )
{
case AU_ALAW_8: /* 8-bit ISDN A-law */
p_sys->fmt.i_codec = VLC_FOURCC( 'a','l','a','w' );
break;
default:
- msg_Warn( p_input, "unknow encoding=0x%x", p_sys->au.i_encoding );
+ msg_Warn( p_demux, "unknow encoding=0x%x", GetDWBE( &hdr[8] ) );
+ p_sys->fmt.audio.i_bitspersample = 0;
+ p_sys->fmt.audio.i_blockalign = 0;
i_cat = AU_CAT_UNKNOWN;
- goto error;
+ break;
}
+
p_sys->fmt.i_bitrate = p_sys->fmt.audio.i_rate *
p_sys->fmt.audio.i_channels *
p_sys->fmt.audio.i_bitspersample;
p_sys->i_frame_size = 0;
p_sys->i_frame_length = 0;
- msg_Err( p_input, "unsupported codec/type (Please report it)" );
- goto error;
+ msg_Err( p_demux, "unsupported codec/type (Please report it)" );
+ free( p_sys );
+ return VLC_EGENERIC;
}
- else
- {
- int i_samples, i_modulo;
- /* read samples for 50ms of */
- i_samples = __MAX( p_sys->fmt.audio.i_rate / 20, 1 );
+ /* add the es */
+ p_sys->es = es_out_Add( p_demux->out, &p_sys->fmt );
- p_sys->i_frame_size = i_samples * p_sys->fmt.audio.i_channels * ( (p_sys->fmt.audio.i_bitspersample + 7) / 8 );
-
- if( p_sys->fmt.audio.i_blockalign > 0 )
+ /* calculate 50ms frame size/time */
+ i_samples = __MAX( p_sys->fmt.audio.i_rate / 20, 1 );
+ p_sys->i_frame_size = i_samples * p_sys->fmt.audio.i_channels *
+ ( (p_sys->fmt.audio.i_bitspersample + 7) / 8 );
+ if( p_sys->fmt.audio.i_blockalign > 0 )
+ {
+ if( ( i_modulo = p_sys->i_frame_size % p_sys->fmt.audio.i_blockalign ) != 0 )
{
- if( ( i_modulo = p_sys->i_frame_size % p_sys->fmt.audio.i_blockalign ) != 0 )
- {
- p_sys->i_frame_size += p_sys->fmt.audio.i_blockalign - i_modulo;
- }
+ p_sys->i_frame_size += p_sys->fmt.audio.i_blockalign - i_modulo;
}
-
- p_sys->i_frame_length = (mtime_t)1000000 *
- (mtime_t)i_samples /
- (mtime_t)p_sys->fmt.audio.i_rate;
-
- p_input->pf_demux = DemuxPCM;
- p_input->pf_demux_control = demux_vaControlDefault;
}
+ p_sys->i_frame_length = (mtime_t)1000000 *
+ (mtime_t)i_samples /
+ (mtime_t)p_sys->fmt.audio.i_rate;
- 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" );
- goto error;
- }
- p_input->stream.i_mux_rate = p_sys->fmt.i_bitrate / 50 / 8;
- vlc_mutex_unlock( &p_input->stream.stream_lock );
+ /* finish to set up p_demux */
+ p_demux->pf_demux = DemuxPCM;
+ p_demux->pf_control = Control;
- p_sys->p_es = es_out_Add( p_input->p_es_out, &p_sys->fmt );
return VLC_SUCCESS;
-
-error:
- free( p_sys );
- return VLC_EGENERIC;
}
/*****************************************************************************
*****************************************************************************
* Returns -1 in case of error, 0 in case of EOF, 1 otherwise
*****************************************************************************/
-static int DemuxPCM( input_thread_t *p_input )
+static int DemuxPCM( demux_t *p_demux )
{
- demux_sys_t *p_sys = p_input->p_demux_data;
- block_t *p_block;
-
- if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
- {
- int64_t i_pos = stream_Tell( p_input->s );
-
- if( p_sys->fmt.audio.i_blockalign != 0 )
- {
- i_pos += p_sys->fmt.audio.i_blockalign - i_pos % p_sys->fmt.audio.i_blockalign;
- if( stream_Seek( p_input->s, i_pos ) )
- {
- msg_Err( p_input, "seek failed (cannot resync)" );
- }
- }
- }
+ demux_sys_t *p_sys = p_demux->p_sys;
+ block_t *p_block;
- input_ClockManageRef( p_input,
- p_input->stream.p_selected_program,
- p_sys->i_time * 9 / 100 );
+ /* set PCR */
+ es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_time );
- if( ( p_block = stream_Block( p_input->s, p_sys->i_frame_size ) ) == NULL )
+ if( ( p_block = stream_Block( p_demux->s, p_sys->i_frame_size ) ) == NULL )
{
- msg_Warn( p_input, "cannot read data" );
+ msg_Warn( p_demux, "cannot read data" );
return 0;
}
+
p_block->i_dts =
- p_block->i_pts = input_ClockGetTS( p_input,
- p_input->stream.p_selected_program,
- p_sys->i_time * 9 / 100 );
+ p_block->i_pts = p_sys->i_time;
- es_out_Send( p_input->p_es_out, p_sys->p_es, p_block );
+ es_out_Send( p_demux->out, p_sys->es, p_block );
p_sys->i_time += p_sys->i_frame_length;
- return( 1 );
+ return 1;
}
/*****************************************************************************
*****************************************************************************/
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;
free( p_sys );
}
+/*****************************************************************************
+ * Control:
+ *****************************************************************************/
+static int Control( demux_t *p_demux, int i_query, va_list args )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+ double f, *pf;
+ int64_t *pi64;
+
+ switch( i_query )
+ {
+ case DEMUX_GET_POSITION:
+ {
+ int64_t i_tell = stream_Tell( p_demux->s );
+ int64_t i_end = stream_Size( p_demux->s );
+
+ pf = (double*) va_arg( args, double* );
+
+ if( p_sys->i_header_size < i_end )
+ {
+ *pf = (double)( i_tell - p_sys->i_header_size ) /
+ (double)(i_end - p_sys->i_header_size);
+ return VLC_SUCCESS;
+ }
+ return VLC_EGENERIC;
+ }
+ case DEMUX_SET_POSITION:
+ {
+ int64_t i_end = stream_Size( p_demux->s );
+
+ f = (double) va_arg( args, double );
+
+ if( p_sys->i_header_size < i_end )
+ {
+ int64_t i_frame = (f * ( i_end - p_sys->i_header_size )) /
+ p_sys->fmt.audio.i_blockalign;
+
+ if( stream_Seek( p_demux->s, p_sys->i_header_size +
+ i_frame * p_sys->fmt.audio.i_blockalign ) )
+ {
+ return VLC_EGENERIC;
+ }
+ p_sys->i_time = 1 + ( i_frame * p_sys->fmt.audio.i_blockalign / p_sys->i_frame_size ) * p_sys->i_frame_length;
+ return VLC_SUCCESS;
+ }
+ return VLC_EGENERIC;
+ }
+
+ case DEMUX_GET_TIME:
+ pi64 = (int64_t*)va_arg( args, int64_t * );
+ *pi64 = p_sys->i_time;
+ return VLC_SUCCESS;
+
+ case DEMUX_GET_LENGTH:
+ {
+ int64_t i_size = stream_Size( p_demux->s ) - p_sys->i_header_size;
+ if( i_size > 0 )
+ {
+ pi64 = (int64_t*)va_arg( args, int64_t * );
+ *pi64 = i_size / p_sys->i_frame_size * p_sys->i_frame_length;
+ return VLC_SUCCESS;
+ }
+ return VLC_EGENERIC;
+ }
+ case DEMUX_SET_TIME:
+ case DEMUX_GET_FPS:
+ default:
+ return VLC_EGENERIC;
+ }
+}
+
+
+
+
+
+
+
+
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