--- /dev/null
+/*****************************************************************************
+ * mpc.c : MPC stream input module for vlc
+ *****************************************************************************
+ * Copyright (C) 2001 the VideoLAN team
+ * $Id: a52.c 11699 2005-07-11 08:52:14Z sam $
+ *
+ * Authors: Laurent Aimar <fenrir@via.ecp.fr.com>
+ *
+ * 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 <vlc/vlc.h>
+#include <vlc/input.h>
+#include <vlc_codec.h>
+#include <math.h>
+
+#include <mpcdec/mpcdec.h>
+
+/* TODO:
+ * - test stream version 4..6
+ * - test fixed float version
+ * - ...
+ *
+ * XXX:
+ * It is done the ugly way (the demux does the decode stage... but it works
+ */
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+#define REPLAYGAIN_TYPE_TEXT N_("Replay Gain type" )
+#define REPLAYGAIN_TYPE_LONGTEXT N_( "Replay Gain type" )
+
+static int Open ( vlc_object_t * );
+static void Close ( vlc_object_t * );
+
+static int pi_replaygain_type[] = { 0, 1, 2 };
+static char *ppsz_replaygain_type[] = { N_("None"), N_("Title"), N_("Album") };
+
+vlc_module_begin();
+ set_shortname( "MPC" );
+ set_description( _("MPC demuxer") );
+ set_category( CAT_INPUT );
+ set_subcategory( SUBCAT_INPUT_DEMUX );
+ set_capability( "demux2", 145 );
+
+ add_integer( "mpc-replaygain-type", 2, NULL,
+ REPLAYGAIN_TYPE_TEXT, REPLAYGAIN_TYPE_LONGTEXT, VLC_FALSE );
+ change_integer_list( pi_replaygain_type, ppsz_replaygain_type, 0 );
+
+ set_callbacks( Open, Close );
+ add_shortcut( "mpc" );
+vlc_module_end();
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int Demux ( demux_t * );
+static int Control( demux_t *, int, va_list );
+
+struct demux_sys_t
+{
+ /* */
+ es_out_id_t *p_es;
+
+ /* */
+ mpc_decoder decoder;
+ mpc_reader reader;
+ mpc_streaminfo info;
+
+ /* */
+ vlc_meta_t *p_meta;
+ int64_t i_position;
+};
+
+mpc_int32_t ReaderRead( void *p_private, void *dst, mpc_int32_t i_size );
+mpc_bool_t ReaderSeek( void *p_private, mpc_int32_t i_offset );
+mpc_int32_t ReaderTell( void *p_private);
+mpc_int32_t ReaderGetSize( void *p_private );
+mpc_bool_t ReaderCanSeek( void *p_private );
+
+/*****************************************************************************
+ * Open: initializes ES structures
+ *****************************************************************************/
+static int Open( vlc_object_t * p_this )
+{
+ demux_t *p_demux = (demux_t*)p_this;
+ demux_sys_t *p_sys;
+ char psz_info[4096];
+ es_format_t fmt;
+ uint8_t *p_peek;
+ module_t *p_id3;
+
+ if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 )
+ return VLC_EGENERIC;
+
+ if( memcmp( p_peek, "MP+", 3 ) )
+ {
+ /* for v4..6 we check extention file */
+ const int i_version = (GetDWLE( p_peek ) >> 11)&0x3ff;
+
+ if( i_version < 4 || i_version > 6 )
+ return VLC_EGENERIC;
+
+ if( !p_demux->psz_demux || strcmp( p_demux->psz_demux, "mpc" ) )
+ {
+ /* Check file name extension */
+ int i_len;
+ if( !p_demux->psz_path )
+ return VLC_EGENERIC;
+
+ i_len = strlen( p_demux->psz_path );
+ if( i_len < 4 ||
+ ( strcasecmp( &p_demux->psz_path[i_len-4], ".mpc" ) &&
+ strcasecmp( &p_demux->psz_path[i_len-4], ".mp+" ) &&
+ strcasecmp( &p_demux->psz_path[i_len-4], ".mpp" ) ) )
+ return VLC_EGENERIC;
+ }
+ }
+
+ /* */
+ p_sys = malloc( sizeof( demux_sys_t ) );
+ memset( p_sys, 0, sizeof(demux_sys_t) );
+
+ p_sys->i_position = 0;
+
+ p_sys->reader.read = ReaderRead;
+ p_sys->reader.seek = ReaderSeek;
+ p_sys->reader.tell = ReaderTell;
+ p_sys->reader.get_size = ReaderGetSize;
+ p_sys->reader.canseek = ReaderCanSeek;
+ p_sys->reader.data = p_demux;
+
+ /* Load info */
+ mpc_streaminfo_init( &p_sys->info );
+ if( mpc_streaminfo_read( &p_sys->info, &p_sys->reader ) != ERROR_CODE_OK )
+ {
+ /* invalid file */
+ free( p_sys );
+ return VLC_EGENERIC;
+ }
+
+ /* */
+ mpc_decoder_setup( &p_sys->decoder, &p_sys->reader );
+ if( !mpc_decoder_initialize( &p_sys->decoder, &p_sys->info ) )
+ {
+ /* */
+ free( p_sys );
+ return VLC_EGENERIC;
+ }
+
+ /* Handle reaply gain */
+ if( p_sys->info.peak_title != 32767 )
+ {
+ int i_type = var_CreateGetInteger( p_demux, "mpc-replaygain-type" );
+ int gain;
+ int peak;
+
+ if( i_type == 2 ) // album
+ {
+ gain = p_sys->info.gain_album;
+ peak = p_sys->info.peak_album;
+ }
+ else if( i_type == 1 ) // title
+ {
+ gain = p_sys->info.gain_title;
+ peak = p_sys->info.peak_title;
+ }
+ else
+ {
+ gain = 0;
+ peak = 0;
+ }
+
+ if( gain )
+ {
+ double g = pow( 10, (double)gain / 2000.0 );
+ double gmax = (double)32767.0 / (peak+1);
+ if( g > gmax )
+ g = gmax;
+
+ msg_Dbg( p_demux, "Using reaply gain factor %f", g );
+ mpc_decoder_scale_output( &p_sys->decoder, g );
+ }
+ }
+
+ /* Fill p_demux fields */
+ p_demux->pf_demux = Demux;
+ p_demux->pf_control = Control;
+ p_demux->p_sys = p_sys;
+
+ /* */
+#ifndef MPC_FIXED_POINT
+ es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC( 'f', 'l', '3', '2' ) );
+#else
+# ifdef WORDS_BIGENDIAN
+ es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC( 's', '3', '2', 'b' ) );
+# else
+ es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC( 's', '3', '2', 'l' ) );
+# endif
+#endif
+ fmt.audio.i_channels = p_sys->info.channels;
+ fmt.audio.i_rate = p_sys->info.sample_freq;
+ fmt.audio.i_blockalign = 4*fmt.audio.i_channels;
+ fmt.audio.i_bitspersample = 32;
+ fmt.i_bitrate = fmt.i_bitrate * fmt.audio.i_channels *
+ fmt.audio.i_bitspersample;
+ p_sys->p_es = es_out_Add( p_demux->out, &fmt );
+
+
+ /* Parse possible id3 header */
+ if( ( p_id3 = module_Need( p_demux, "id3", NULL, 0 ) ) )
+ {
+ p_sys->p_meta = (vlc_meta_t *)p_demux->p_private;
+ p_demux->p_private = NULL;
+ module_Unneed( p_demux, p_id3 );
+ }
+
+ if( !p_sys->p_meta )
+ p_sys->p_meta = vlc_meta_New();
+
+ sprintf( psz_info, "Musepack v%d", p_sys->info.stream_version );
+ vlc_meta_Add( p_sys->p_meta, VLC_META_CODEC_NAME, psz_info );
+
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * Close: frees unused data
+ *****************************************************************************/
+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;
+
+ free( p_sys );
+}
+
+/*****************************************************************************
+ * Demux:
+ *****************************************************************************
+ * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
+ *****************************************************************************/
+static int Demux( demux_t *p_demux )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+ block_t *p_data;
+ int i_ret;
+
+ p_data = block_New( p_demux,
+ MPC_DECODER_BUFFER_LENGTH*sizeof(MPC_SAMPLE_FORMAT) );
+ i_ret = mpc_decoder_decode( &p_sys->decoder,
+ (MPC_SAMPLE_FORMAT*)p_data->p_buffer,
+ NULL, NULL );
+ if( i_ret <= 0 )
+ {
+ block_Release( p_data );
+ return i_ret < 0 ? -1 : 0;
+ }
+
+ /* */
+ p_data->i_buffer = i_ret * sizeof(MPC_SAMPLE_FORMAT) * p_sys->info.channels;
+ p_data->i_dts = p_data->i_pts =
+ 1 + I64C(1000000) * p_sys->i_position / p_sys->info.sample_freq;
+
+ es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_data->i_dts );
+
+ es_out_Send( p_demux->out, p_sys->p_es, p_data );
+
+ /* */
+ p_sys->i_position += i_ret;
+
+ 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;
+ int i;
+ double f, *pf;
+ int64_t i64, *pi64;
+ vlc_meta_t **pp_meta;
+
+ switch( i_query )
+ {
+ case DEMUX_GET_META:
+ pp_meta = (vlc_meta_t **)va_arg( args, vlc_meta_t** );
+ if( p_sys->p_meta )
+ *pp_meta = vlc_meta_Duplicate( p_sys->p_meta );
+ else
+ *pp_meta = NULL;
+ return VLC_SUCCESS;
+
+ case DEMUX_GET_LENGTH:
+ pi64 = (int64_t*)va_arg( args, int64_t * );
+ *pi64 = I64C(1000000) * p_sys->info.pcm_samples /
+ p_sys->info.sample_freq;
+ return VLC_SUCCESS;
+
+ case DEMUX_GET_POSITION:
+ pf = (double*)va_arg( args, double * );
+ if( p_sys->info.pcm_samples > 0 )
+ *pf = (double) p_sys->i_position /
+ (double)p_sys->info.pcm_samples;
+ else
+ *pf = 0.0;
+ return VLC_SUCCESS;
+
+ case DEMUX_GET_TIME:
+ pi64 = (int64_t*)va_arg( args, int64_t * );
+ *pi64 = I64C(1000000) * p_sys->i_position /
+ p_sys->info.sample_freq;
+ return VLC_SUCCESS;
+
+ case DEMUX_SET_POSITION:
+ f = (double)va_arg( args, double );
+ i64 = (int64_t)(f * p_sys->info.pcm_samples);
+ if( mpc_decoder_seek_sample( &p_sys->decoder, i64 ) )
+ {
+ p_sys->i_position = i64;
+ return VLC_SUCCESS;
+ }
+ return VLC_EGENERIC;
+
+ case DEMUX_SET_TIME:
+ i64 = (int64_t)va_arg( args, int64_t );
+ if( mpc_decoder_seek_sample( &p_sys->decoder, i64 ) )
+ {
+ p_sys->i_position = i64;
+ return VLC_SUCCESS;
+ }
+ return VLC_EGENERIC;
+
+ default:
+ return VLC_EGENERIC;
+ }
+}
+
+mpc_int32_t ReaderRead( void *p_private, void *dst, mpc_int32_t i_size )
+{
+ demux_t *p_demux = (demux_t*)p_private;
+ return stream_Read( p_demux->s, dst, i_size );
+}
+
+mpc_bool_t ReaderSeek( void *p_private, mpc_int32_t i_offset )
+{
+ demux_t *p_demux = (demux_t*)p_private;
+ return !stream_Seek( p_demux->s, i_offset );
+}
+
+mpc_int32_t ReaderTell( void *p_private)
+{
+ demux_t *p_demux = (demux_t*)p_private;
+ return stream_Tell( p_demux->s );
+}
+
+mpc_int32_t ReaderGetSize( void *p_private )
+{
+ demux_t *p_demux = (demux_t*)p_private;
+ return stream_Size( p_demux->s );
+}
+
+mpc_bool_t ReaderCanSeek( void *p_private )
+{
+ demux_t *p_demux = (demux_t*)p_private;
+ vlc_bool_t b_canseek;
+
+ stream_Control( p_demux->s, STREAM_CAN_SEEK, &b_canseek );
+ return b_canseek;
+}
+
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