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VLC Source 0.5.3.dmg
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input_ext-intf.c
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2003-04-07
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/*****************************************************************************
* input_ext-intf.c: services to the interface
*****************************************************************************
* Copyright (C) 1998-2001 VideoLAN
* $Id: input_ext-intf.c,v 1.48 2003/03/11 23:56:54 gbazin Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <string.h> /* memcpy(), memset() */
#include <vlc/vlc.h>
#include "stream_control.h"
#include "input_ext-dec.h"
#include "input_ext-intf.h"
#include "input_ext-plugins.h"
/*****************************************************************************
* input_SetStatus: change the reading status
*****************************************************************************/
void __input_SetStatus( vlc_object_t * p_this, int i_mode )
{
input_thread_t *p_input;
p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
if( p_input == NULL )
{
msg_Err( p_this, "no input found" );
return;
}
vlc_mutex_lock( &p_input->stream.stream_lock );
switch( i_mode )
{
case INPUT_STATUS_END:
p_input->stream.i_new_status = PLAYING_S;
p_input->b_eof = 1;
msg_Dbg( p_input, "end of stream" );
break;
case INPUT_STATUS_PLAY:
p_input->stream.i_new_status = PLAYING_S;
msg_Dbg( p_input, "playing at normal rate" );
break;
case INPUT_STATUS_PAUSE:
/* XXX: we don't need to check i_status, because input_clock.c
* does it for us */
p_input->stream.i_new_status = PAUSE_S;
msg_Dbg( p_input, "toggling pause" );
break;
case INPUT_STATUS_FASTER:
/* If we are already going too fast, go back to default rate */
if( p_input->stream.control.i_rate * 8 <= DEFAULT_RATE )
{
msg_Dbg( p_input, "can not play any faster" );
}
else
{
p_input->stream.i_new_status = FORWARD_S;
p_input->stream.i_new_rate =
p_input->stream.control.i_rate / 2;
if ( p_input->stream.i_new_rate < DEFAULT_RATE )
{
msg_Dbg( p_input, "playing at %i:1 fast forward",
DEFAULT_RATE / p_input->stream.i_new_rate );
}
else if ( p_input->stream.i_new_rate > DEFAULT_RATE )
{
msg_Dbg( p_input, "playing at 1:%i slow motion",
p_input->stream.i_new_rate / DEFAULT_RATE );
}
else if ( p_input->stream.i_new_rate == DEFAULT_RATE )
{
p_input->stream.i_new_status = PLAYING_S;
msg_Dbg( p_input, "playing at normal rate" );
}
}
break;
case INPUT_STATUS_SLOWER:
/* If we are already going too slow, go back to default rate */
if( p_input->stream.control.i_rate >= 8 * DEFAULT_RATE )
{
msg_Dbg( p_input, "can not play any slower" );
}
else
{
p_input->stream.i_new_status = FORWARD_S;
p_input->stream.i_new_rate =
p_input->stream.control.i_rate * 2;
if ( p_input->stream.i_new_rate < DEFAULT_RATE )
{
msg_Dbg( p_input, "playing at %i:1 fast forward",
DEFAULT_RATE / p_input->stream.i_new_rate );
}
else if ( p_input->stream.i_new_rate > DEFAULT_RATE )
{
msg_Dbg( p_input, "playing at 1:%i slow motion",
p_input->stream.i_new_rate / DEFAULT_RATE );
}
else if ( p_input->stream.i_new_rate == DEFAULT_RATE )
{
p_input->stream.i_new_status = PLAYING_S;
msg_Dbg( p_input, "playing at normal rate" );
}
}
break;
default:
break;
}
vlc_cond_signal( &p_input->stream.stream_wait );
vlc_mutex_unlock( &p_input->stream.stream_lock );
vlc_object_release( p_input );
}
/*****************************************************************************
* input_Seek: changes the stream postion
*****************************************************************************/
void __input_Seek( vlc_object_t * p_this, off_t i_position, int i_whence )
{
input_thread_t *p_input;
char psz_time1[OFFSETTOTIME_MAX_SIZE];
char psz_time2[OFFSETTOTIME_MAX_SIZE];
p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
if( p_input == NULL )
{
msg_Err( p_this, "no input found" );
return;
}
vlc_mutex_lock( &p_input->stream.stream_lock );
#define A p_input->stream.p_selected_area
switch( i_whence & 0x30 )
{
case INPUT_SEEK_SECONDS:
i_position *= (off_t)50 * p_input->stream.i_mux_rate;
break;
case INPUT_SEEK_PERCENT:
i_position = A->i_size * i_position / (off_t)100;
break;
case INPUT_SEEK_BYTES:
default:
break;
}
switch( i_whence & 0x03 )
{
case INPUT_SEEK_CUR:
A->i_seek = A->i_tell + i_position;
break;
case INPUT_SEEK_END:
A->i_seek = A->i_size + i_position;
break;
case INPUT_SEEK_SET:
default:
A->i_seek = i_position;
break;
}
if( A->i_seek < 0 )
{
A->i_seek = 0;
}
else if( A->i_seek > A->i_size )
{
A->i_seek = A->i_size;
}
msg_Dbg( p_input, "seeking position "I64Fd"/"I64Fd" (%s/%s)",
A->i_seek, A->i_size,
input_OffsetToTime( p_input, psz_time1, i_position ),
input_OffsetToTime( p_input, psz_time2, A->i_size ) );
#undef A
vlc_cond_signal( &p_input->stream.stream_wait );
vlc_mutex_unlock( &p_input->stream.stream_lock );
vlc_object_release( p_input );
}
/*****************************************************************************
* input_Tell: requests the stream postion
*****************************************************************************/
void __input_Tell( vlc_object_t * p_this, stream_position_t * p_position )
{
input_thread_t *p_input;
p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
if( p_input == NULL )
{
p_position->i_tell = 0;
p_position->i_size = 0;
p_position->i_mux_rate = 0;
msg_Err( p_this, "no input found" );
return;
}
vlc_mutex_lock( &p_input->stream.stream_lock );
#define A p_input->stream.p_selected_area
p_position->i_tell = A->i_tell;
p_position->i_size = A->i_size;
p_position->i_mux_rate = p_input->stream.i_mux_rate;
#undef A
vlc_mutex_unlock( &p_input->stream.stream_lock );
vlc_object_release( p_input );
}
/*****************************************************************************
* input_OffsetToTime : converts an off_t value to a time indicator, using
* mux_rate
*****************************************************************************
* BEWARE : this function assumes that you already own the lock on
* p_input->stream.stream_lock
*****************************************************************************/
char * input_OffsetToTime( input_thread_t * p_input, char * psz_buffer,
off_t i_offset )
{
mtime_t i_seconds;
if( p_input->stream.i_mux_rate )
{
i_seconds = i_offset / 50 / p_input->stream.i_mux_rate;
snprintf( psz_buffer, OFFSETTOTIME_MAX_SIZE, "%d:%02d:%02d",
(int) (i_seconds / (60 * 60)),
(int) (i_seconds / 60 % 60),
(int) (i_seconds % 60) );
return( psz_buffer );
}
else
{
/* Divide by zero is not my friend. */
sprintf( psz_buffer, "-:--:--" );
return( psz_buffer );
}
}
/*****************************************************************************
* input_DumpStream: dumps the contents of a stream descriptor
*****************************************************************************
* BEWARE : this function assumes that you already own the lock on
* p_input->stream.stream_lock
*****************************************************************************/
void input_DumpStream( input_thread_t * p_input )
{
char psz_time1[OFFSETTOTIME_MAX_SIZE];
char psz_time2[OFFSETTOTIME_MAX_SIZE];
unsigned int i, j;
#define S p_input->stream
msg_Dbg( p_input, "dumping stream ID 0x%x [OK:%ld/D:%ld]", S.i_stream_id,
S.c_packets_read, S.c_packets_trashed );
if( S.b_seekable )
msg_Dbg( p_input, "seekable stream, position: "I64Fd"/"I64Fd" (%s/%s)",
S.p_selected_area->i_tell, S.p_selected_area->i_size,
input_OffsetToTime( p_input, psz_time1,
S.p_selected_area->i_tell ),
input_OffsetToTime( p_input, psz_time2,
S.p_selected_area->i_size ) );
else
msg_Dbg( p_input, "pace %scontrolled", S.b_pace_control ? "" : "un-" );
#undef S
for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
{
#define P p_input->stream.pp_programs[i]
msg_Dbg( p_input, "dumping program 0x%x, version %d (%s)",
P->i_number, P->i_version,
P->b_is_ok ? "complete" : "partial" );
#undef P
for( j = 0; j < p_input->stream.pp_programs[i]->i_es_number; j++ )
{
#define ES p_input->stream.pp_programs[i]->pp_es[j]
msg_Dbg( p_input, "ES 0x%x, "
"stream 0x%x, fourcc `%4.4s', %s [OK:%ld/ERR:%ld]",
ES->i_id, ES->i_stream_id, (char*)&ES->i_fourcc,
ES->p_decoder_fifo != NULL ? "selected" : "not selected",
ES->c_packets, ES->c_invalid_packets );
#undef ES
}
}
}
/*****************************************************************************
* input_ToggleES: answers to a user request with calls to (Un)SelectES
*****************************************************************************
* Useful since the interface plugins know p_es.
* It only works for audio & spu ( to be sure nothing nasty is being done ).
* b_select is a boolean to know if we have to select or unselect ES
*****************************************************************************/
int input_ToggleES( input_thread_t * p_input, es_descriptor_t * p_es,
vlc_bool_t b_select )
{
vlc_mutex_lock( &p_input->stream.stream_lock );
if( p_es != NULL )
{
if( b_select )
{
p_input->stream.p_newly_selected_es = p_es;
}
else
{
p_input->stream.p_removed_es = p_es;
}
}
vlc_mutex_unlock( &p_input->stream.stream_lock );
return 0;
}
/****************************************************************************
* input_ChangeArea: interface request an area change
****************************************************************************/
int input_ChangeArea( input_thread_t * p_input, input_area_t * p_area )
{
vlc_mutex_lock( &p_input->stream.stream_lock );
p_input->stream.p_new_area = p_area;
vlc_mutex_unlock( &p_input->stream.stream_lock );
return 0;
}
/****************************************************************************
* input_ChangeProgram: interface request a program change
****************************************************************************/
int input_ChangeProgram( input_thread_t * p_input, uint16_t i_program_number )
{
pgrm_descriptor_t * p_program;
vlc_value_t val;
vlc_mutex_lock( &p_input->stream.stream_lock );
p_program = input_FindProgram( p_input, i_program_number );
if ( p_program == NULL )
{
msg_Err( p_input, "could not find selected program" );
return -1;
}
p_input->stream.p_new_program = p_program;
vlc_mutex_unlock( &p_input->stream.stream_lock );
/* Update the navigation variables without triggering a callback */
val.i_int = i_program_number;
var_Change( p_input, "program", VLC_VAR_SETVALUE, &val );
return 0;
}
/****************************************************************************
* input_ToggleGrayscale: change to grayscale or color output
****************************************************************************/
int input_ToggleGrayscale( input_thread_t * p_input )
{
/* No need to warn the input thread since only the decoders and outputs
* worry about it. */
vlc_mutex_lock( &p_input->stream.control.control_lock );
p_input->stream.control.b_grayscale =
!p_input->stream.control.b_grayscale;
msg_Dbg( p_input, "changing to %s output",
p_input->stream.control.b_grayscale ? "grayscale" : "color" );
vlc_mutex_unlock( &p_input->stream.control.control_lock );
return 0;
}
/****************************************************************************
* input_ToggleMute: activate/deactivate mute mode
****************************************************************************/
int input_ToggleMute( input_thread_t * p_input )
{
/* We need to feed the decoders with 0, and only input can do that, so
* pass the message to the input thread. */
vlc_mutex_lock( &p_input->stream.stream_lock );
p_input->stream.b_new_mute = !p_input->stream.control.b_mute;
msg_Dbg( p_input, "%s mute mode",
p_input->stream.control.b_mute ? "activating" : "deactivating" );
vlc_mutex_unlock( &p_input->stream.stream_lock );
return 0;
}