mod.c
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上传日期:2009-03-27
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文件大小:12k
- /*****************************************************************************
- * mod.c: MOD file demuxer (using libmodplug)
- *****************************************************************************
- * Copyright (C) 2004 VideoLAN
- * $Id: mod.c 6963 2004-03-05 19:24:14Z murray $
- *
- * Authors: Laurent Aimar <fenrir@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 <stdlib.h> /* malloc(), free() */
- #include <vlc/vlc.h>
- #include <vlc/input.h>
- #include <libmodplug/modplug.h>
- /* TODO:
- * - extend demux control to query meta data (demuxer should NEVER touch
- * playlist itself)
- * - FIXME test endian of samples
- * - ...
- */
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- static int Open ( vlc_object_t * );
- static void Close ( vlc_object_t * );
- vlc_module_begin();
- set_description( _("MOD demuxer (libmodplug)" ) );
- set_capability( "demux2", 10 );
- add_bool( "mod-noisereduction", VLC_TRUE, NULL, N_("Noise reduction"), N_("Noise reduction"), VLC_FALSE );
- add_bool( "mod-reverb", VLC_FALSE, NULL, N_("Reverb"), N_("Reverb"), VLC_FALSE );
- add_integer_with_range( "mod-reverb-level", 0, 0, 100, NULL, N_("Reverb level (0-100)"), N_("Reverb level (0-100 defaults to 0)"), VLC_FALSE );
- add_integer_with_range( "mod-reverb-delay", 40, 0, 1000, NULL, N_("Reverb delay (ms)"), N_("Reverb delay in ms (usually 40-200ms)"), VLC_FALSE );
- add_bool( "mod-megabass", VLC_FALSE, NULL, N_("Mega bass"), N_("Mega bass"), VLC_FALSE );
- add_integer_with_range( "mod-megabass-level", 0, 0, 100, NULL, N_("Mega bass level (0-100)"), N_("Mega bass level (0-100 defaults to 0)"), VLC_FALSE );
- add_integer_with_range( "mod-megabass-range", 10, 10, 100, NULL, N_("Mega bass cut off (Hz)"), N_("Mega bass cut off (10-100Hz)"), VLC_FALSE );
- add_bool( "mod-surround", VLC_FALSE, NULL, N_("Surround"), N_("Surround"), VLC_FALSE );
- add_integer_with_range( "mod-surround-level", 0, 0, 100, NULL, N_("Surround level (0-100)"), N_("Surround level (0-100 defaults to 0)"), VLC_FALSE );
- add_integer_with_range( "mod-surround-delay", 5, 0, 1000, NULL, N_("Surround delay (ms)"), N_("Surround delay in ms (usually 5-40ms)"), VLC_FALSE );
- set_callbacks( Open, Close );
- add_shortcut( "mod" );
- vlc_module_end();
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- struct demux_sys_t
- {
- es_format_t fmt;
- es_out_id_t *es;
- int64_t i_time;
- int64_t i_length;
- int i_data;
- uint8_t *p_data;
- ModPlugFile *f;
- };
- static int Demux ( demux_t *p_demux );
- static int Control( demux_t *p_demux, int i_query, va_list args );
- static const char* mod_ext[] =
- {
- "mod", "s3m", "xm", "it", "669", "amf", "ams", "dbm", "dmf", "dsm",
- "far", "mdl", "med", "mtm", "okt", "ptm", "stm", "ult", "umx", "mt2",
- "psm", NULL
- };
- /*****************************************************************************
- * Open
- *****************************************************************************/
- static int Open( vlc_object_t *p_this )
- {
- demux_t *p_demux = (demux_t*)p_this;
- demux_sys_t *p_sys;
- char *ext;
- int i;
- ModPlug_Settings settings;
- vlc_value_t val;
- /* We accept file based on extention match */
- if( strcasecmp( p_demux->psz_demux, "mod" ) )
- {
- if( ( ext = strchr( p_demux->psz_path, '.' ) ) == NULL || stream_Size( p_demux->s ) == 0 )
- {
- msg_Warn( p_demux, "MOD module discarded (path=%s)", p_demux->psz_path );
- return VLC_EGENERIC;
- }
- ext++; /* skip . */
- for( i = 0; mod_ext[i] != NULL; i++ )
- {
- if( !strcasecmp( ext, mod_ext[i] ) )
- {
- break;
- }
- }
- if( mod_ext[i] == NULL )
- {
- msg_Warn( p_demux, "MOD module discarded (extention '%s' unknown)", ext );
- return VLC_EGENERIC;
- }
- msg_Dbg( p_demux, "running MOD demuxer (ext=%s)", mod_ext[i] );
- }
- /* Fill p_demux field */
- p_demux->pf_demux = Demux;
- p_demux->pf_control = Control;
- p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
- msg_Dbg( p_demux, "loading complete file (could be long)" );
- p_sys->i_data = stream_Size( p_demux->s );
- p_sys->p_data = malloc( p_sys->i_data );
- p_sys->i_data = stream_Read( p_demux->s, p_sys->p_data, p_sys->i_data );
- if( p_sys->i_data <= 0 )
- {
- msg_Err( p_demux, "failed to read the complete file" );
- free( p_sys->p_data );
- free( p_sys );
- return VLC_EGENERIC;
- }
- /* Create our config variable */
- var_Create( p_demux, "mod-noisereduction", VLC_VAR_BOOL|VLC_VAR_DOINHERIT );
- var_Create( p_demux, "mod-reverb", VLC_VAR_BOOL|VLC_VAR_DOINHERIT );
- var_Create( p_demux, "mod-reverb-level", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
- var_Create( p_demux, "mod-reverb-delay", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
- var_Create( p_demux, "mod-megabass", VLC_VAR_BOOL|VLC_VAR_DOINHERIT );
- var_Create( p_demux, "mod-megabass-level", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
- var_Create( p_demux, "mod-megabass-range", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
- var_Create( p_demux, "mod-surround", VLC_VAR_BOOL|VLC_VAR_DOINHERIT );
- var_Create( p_demux, "mod-surround-level", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
- var_Create( p_demux, "mod-surround-delay", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
- /* Configure modplug before loading the file */
- ModPlug_GetSettings( &settings );
- settings.mFlags = MODPLUG_ENABLE_OVERSAMPLING;
- settings.mChannels = 2;
- settings.mBits = 16;
- settings.mFrequency = 44100;
- settings.mResamplingMode = MODPLUG_RESAMPLE_FIR;
- var_Get( p_demux, "mod-noisereduction", &val );
- if( val.b_bool) settings.mFlags |= MODPLUG_ENABLE_NOISE_REDUCTION;
- var_Get( p_demux, "mod-reverb", &val );
- if( val.b_bool) settings.mFlags |= MODPLUG_ENABLE_REVERB;
- var_Get( p_demux, "mod-reverb-level", &val );
- settings.mReverbDepth = val.i_int;
- var_Get( p_demux, "mod-reverb-delay", &val );
- settings.mReverbDelay = val.i_int;
- var_Get( p_demux, "mod-megabass", &val );
- if( val.b_bool) settings.mFlags |= MODPLUG_ENABLE_MEGABASS;
- var_Get( p_demux, "mod-megabass-level", &val );
- settings.mBassAmount = val.i_int;
- var_Get( p_demux, "mod-megabass-range", &val );
- settings.mBassRange = val.i_int;
- var_Get( p_demux, "mod-surround", &val );
- if( val.b_bool) settings.mFlags |= MODPLUG_ENABLE_SURROUND;
- var_Get( p_demux, "mod-surround-level", &val );
- settings.mSurroundDepth = val.i_int;
- var_Get( p_demux, "mod-surround-delay", &val );
- settings.mSurroundDelay = val.i_int;
- ModPlug_SetSettings( &settings );
- if( ( p_sys->f = ModPlug_Load( p_sys->p_data, p_sys->i_data ) ) == NULL )
- {
- msg_Err( p_demux, "failed to understand the file" );
- /* we try to seek to recover for other plugin */
- stream_Seek( p_demux->s, 0 );
- free( p_sys->p_data );
- free( p_sys );
- return VLC_EGENERIC;
- }
- /* init time */
- p_sys->i_time = 1;
- p_sys->i_length = ModPlug_GetLength( p_sys->f ) * (int64_t)1000;
- msg_Dbg( p_demux, "MOD loaded name=%s lenght="I64Fd"ms",
- ModPlug_GetName( p_sys->f ),
- p_sys->i_length );
- #ifdef WORDS_BIGENDIAN
- es_format_Init( &p_sys->fmt, AUDIO_ES, VLC_FOURCC( 't', 'w', 'o', 's' ) );
- #else
- es_format_Init( &p_sys->fmt, AUDIO_ES, VLC_FOURCC( 'a', 'r', 'a', 'w' ) );
- #endif
- p_sys->fmt.audio.i_rate = settings.mFrequency;
- p_sys->fmt.audio.i_channels = settings.mChannels;
- p_sys->fmt.audio.i_bitspersample = settings.mBits;
- p_sys->es = es_out_Add( p_demux->out, &p_sys->fmt );
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Close
- *****************************************************************************/
- static void Close( vlc_object_t *p_this )
- {
- demux_t *p_demux = (demux_t*)p_this;
- demux_sys_t *p_sys = p_demux->p_sys;
- ModPlug_Unload( p_sys->f );
- free( p_sys->p_data );
- free( p_sys );
- }
- /*****************************************************************************
- * Demux:
- *****************************************************************************/
- static int Demux( demux_t *p_demux )
- {
- demux_sys_t *p_sys = p_demux->p_sys;
- block_t *p_frame;
- int i_bk = ( p_sys->fmt.audio.i_bitspersample / 8 ) *
- p_sys->fmt.audio.i_channels;
- p_frame = block_New( p_demux, p_sys->fmt.audio.i_rate / 10 * i_bk );
- p_frame->i_buffer = ModPlug_Read( p_sys->f, p_frame->p_buffer, p_frame->i_buffer );
- if( p_frame->i_buffer <= 0 )
- {
- /* EOF */
- block_Release( p_frame );
- return 0;
- }
- /* Set PCR */
- es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_time );
- /* We should use p_frame->i_buffer */
- p_sys->i_time += (int64_t)1000000 * p_frame->i_buffer / i_bk / p_sys->fmt.audio.i_rate;
- /* Send data */
- p_frame->i_dts = p_frame->i_pts = p_sys->i_time;
- es_out_Send( p_demux->out, p_sys->es, p_frame );
- 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;
- double f, *pf;
- int64_t i64, *pi64;
- switch( i_query )
- {
- case DEMUX_GET_POSITION:
- pf = (double*) va_arg( args, double* );
- if( p_sys->i_length > 0 )
- {
- *pf = (double)p_sys->i_time / (double)p_sys->i_length;
- return VLC_SUCCESS;
- }
- return VLC_EGENERIC;
- case DEMUX_SET_POSITION:
- f = (double) va_arg( args, double );
- i64 = f * p_sys->i_length;
- if( i64 >= 0 && i64 <= p_sys->i_length )
- {
- ModPlug_Seek( p_sys->f, i64 / 1000 );
- p_sys->i_time = i64 + 1;
- es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
- 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:
- pi64 = (int64_t*)va_arg( args, int64_t * );
- *pi64 = p_sys->i_length;
- return VLC_SUCCESS;
- case DEMUX_SET_TIME:
- i64 = (int64_t)va_arg( args, int64_t );
- if( i64 >= 0 && i64 <= p_sys->i_length )
- {
- ModPlug_Seek( p_sys->f, i64 / 1000 );
- p_sys->i_time = i64 + 1;
- es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
- return VLC_SUCCESS;
- }
- return VLC_EGENERIC;
- case DEMUX_GET_FPS: /* meaningless */
- default:
- return VLC_EGENERIC;
- }
- }