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333 lines
10 KiB
333 lines
10 KiB
/*****************************************************************************
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* mpc.c : MPC stream input module for vlc
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*****************************************************************************
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* Copyright (C) 2001 the VideoLAN team
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*
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* Authors: Laurent Aimar <fenrir@via.ecp.fr.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <vlc_common.h>
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#include <vlc_plugin.h>
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#include <vlc_demux.h>
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#include <vlc_codec.h>
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#include <math.h>
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#include <mpc/mpcdec.h>
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/* TODO:
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* - test stream version 4..6
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* - test fixed float version
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* - ...
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*
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* XXX:
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* It is done the ugly way (the demux does the decode stage... but it works
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*/
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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static int Open ( vlc_object_t * );
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vlc_module_begin ()
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set_subcategory( SUBCAT_INPUT_DEMUX )
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set_description( N_("MusePack demuxer") )
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set_capability( "demux", 145 )
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set_callback( Open )
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add_shortcut( "mpc" )
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add_file_extension("mpc")
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add_file_extension("mp+")
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add_file_extension("mpp")
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vlc_module_end ()
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/*****************************************************************************
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* Local prototypes
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*****************************************************************************/
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static int Demux ( demux_t * );
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static int Control( demux_t *, int, va_list );
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typedef struct
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{
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/* */
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es_out_id_t *p_es;
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/* */
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mpc_demux *decoder;
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mpc_reader reader;
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mpc_streaminfo info;
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/* */
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mpc_uint64_t i_position;
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} demux_sys_t;
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static mpc_int32_t ReaderRead(mpc_reader *, void *dst, mpc_int32_t i_size);
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static mpc_bool_t ReaderSeek(mpc_reader *, mpc_int32_t i_offset);
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static mpc_int32_t ReaderTell(mpc_reader *);
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static mpc_int32_t ReaderGetSize(mpc_reader *);
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static mpc_bool_t ReaderCanSeek(mpc_reader *);
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/*****************************************************************************
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* Open: initializes ES structures
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*****************************************************************************/
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static int Open( vlc_object_t * p_this )
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{
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demux_t *p_demux = (demux_t*)p_this;
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demux_sys_t *p_sys;
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es_format_t fmt;
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const uint8_t *p_peek;
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if( vlc_stream_Peek( p_demux->s, &p_peek, 4 ) < 4 )
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return VLC_EGENERIC;
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if( memcmp( p_peek, "MP+", 3 ) )
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{
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/* for v4..6 we check extension file */
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const int i_version = (GetDWLE( p_peek ) >> 11)&0x3ff;
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if( i_version < 4 || i_version > 6 )
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return VLC_EGENERIC;
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if( !p_demux->obj.force )
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return VLC_EGENERIC;
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}
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/* */
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p_sys = vlc_obj_calloc( p_this, 1, sizeof( *p_sys ) );
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if( !p_sys )
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return VLC_ENOMEM;
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p_sys->i_position = 0;
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p_sys->reader.read = ReaderRead;
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p_sys->reader.seek = ReaderSeek;
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p_sys->reader.tell = ReaderTell;
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p_sys->reader.get_size = ReaderGetSize;
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p_sys->reader.canseek = ReaderCanSeek;
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p_sys->reader.data = p_demux->s;
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/* */
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p_sys->decoder = mpc_demux_init( &p_sys->reader );
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if( !p_sys->decoder )
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return VLC_EGENERIC;
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/* Load info */
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mpc_demux_get_info( p_sys->decoder, &p_sys->info );
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/* Fill p_demux fields */
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p_demux->pf_demux = Demux;
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p_demux->pf_control = Control;
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p_demux->p_sys = p_sys;
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/* */
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#ifndef MPC_FIXED_POINT
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es_format_Init( &fmt, AUDIO_ES, VLC_CODEC_FL32 );
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#else
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# ifdef WORDS_BIGENDIAN
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es_format_Init( &fmt, AUDIO_ES, VLC_CODEC_S32B );
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# else
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es_format_Init( &fmt, AUDIO_ES, VLC_CODEC_S32L );
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# endif
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#endif
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fmt.audio.i_channels = p_sys->info.channels;
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fmt.audio.i_rate = p_sys->info.sample_freq;
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fmt.audio.i_blockalign = 4*fmt.audio.i_channels;
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fmt.audio.i_bitspersample = 32;
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fmt.i_bitrate = fmt.i_bitrate * fmt.audio.i_channels *
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fmt.audio.i_bitspersample;
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#ifdef HAVE_MPC_MPCDEC_H
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# define CONVERT_PEAK( mpc_peak ) (pow( 10, (mpc_peak) / 256.0 / 20.0 ) / 32767.0)
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# define CONVERT_GAIN( mpc_gain ) (MPC_OLD_GAIN_REF - (mpc_gain) / 256.0)
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#else
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# define CONVERT_PEAK( mpc_peak ) ((mpc_peak) / 32767.0)
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# define CONVERT_GAIN( mpc_gain ) ((mpc_gain) / 100.0)
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#endif
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if( p_sys->info.peak_title > 0 )
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{
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fmt.audio_replay_gain.pb_peak[AUDIO_REPLAY_GAIN_TRACK] = true;
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fmt.audio_replay_gain.pf_peak[AUDIO_REPLAY_GAIN_TRACK] = (float) CONVERT_PEAK( p_sys->info.peak_title );
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fmt.audio_replay_gain.pb_gain[AUDIO_REPLAY_GAIN_TRACK] = true;
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fmt.audio_replay_gain.pf_gain[AUDIO_REPLAY_GAIN_TRACK] = (float) CONVERT_GAIN( p_sys->info.gain_title );
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}
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if( p_sys->info.peak_album > 0 )
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{
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fmt.audio_replay_gain.pb_peak[AUDIO_REPLAY_GAIN_ALBUM] = true;
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fmt.audio_replay_gain.pf_peak[AUDIO_REPLAY_GAIN_ALBUM] = (float) CONVERT_PEAK( p_sys->info.peak_album );
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fmt.audio_replay_gain.pb_gain[AUDIO_REPLAY_GAIN_ALBUM] = true;
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fmt.audio_replay_gain.pf_gain[AUDIO_REPLAY_GAIN_ALBUM] = (float) CONVERT_GAIN( p_sys->info.gain_album );
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}
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#undef CONVERT_GAIN
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#undef CONVERT_PEAK
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fmt.i_id = 0;
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p_sys->p_es = es_out_Add( p_demux->out, &fmt );
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if( !p_sys->p_es )
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return VLC_EGENERIC;
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return VLC_SUCCESS;
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}
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/*****************************************************************************
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* Demux:
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*****************************************************************************
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* Returns -1 in case of error, 0 in case of EOF, 1 otherwise
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*****************************************************************************/
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static int Demux( demux_t *p_demux )
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{
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demux_sys_t *p_sys = p_demux->p_sys;
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block_t *p_data;
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mpc_frame_info frame;
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mpc_status err;
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p_data = block_Alloc( MPC_DECODER_BUFFER_LENGTH*sizeof(MPC_SAMPLE_FORMAT) );
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if( unlikely(!p_data) )
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return VLC_DEMUXER_EGENERIC;
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frame.buffer = (MPC_SAMPLE_FORMAT*)p_data->p_buffer;
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err = mpc_demux_decode( p_sys->decoder, &frame );
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if( err != MPC_STATUS_OK )
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{
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block_Release( p_data );
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return VLC_DEMUXER_EGENERIC;
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}
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else if( frame.bits == -1 || frame.samples == 0 )
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{
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block_Release( p_data );
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return VLC_DEMUXER_EOF;
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}
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/* */
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p_data->i_buffer = frame.samples * sizeof(MPC_SAMPLE_FORMAT) * p_sys->info.channels;
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p_data->i_dts = p_data->i_pts =
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VLC_TICK_0 + vlc_tick_from_samples(p_sys->i_position, p_sys->info.sample_freq);
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es_out_SetPCR( p_demux->out, p_data->i_dts );
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es_out_Send( p_demux->out, p_sys->p_es, p_data );
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/* */
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p_sys->i_position += frame.samples;
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return VLC_DEMUXER_SUCCESS;
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}
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/*****************************************************************************
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* Control:
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*****************************************************************************/
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static int Control( demux_t *p_demux, int i_query, va_list args )
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{
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demux_sys_t *p_sys = p_demux->p_sys;
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switch( i_query )
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{
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case DEMUX_CAN_SEEK:
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return vlc_stream_vaControl( p_demux->s, i_query, args );
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case DEMUX_HAS_UNSUPPORTED_META:
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*va_arg( args, bool* ) = true;
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return VLC_SUCCESS;
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case DEMUX_GET_LENGTH:
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*va_arg( args, vlc_tick_t * ) =
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vlc_tick_from_samples(p_sys->info.samples, p_sys->info.sample_freq);
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return VLC_SUCCESS;
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case DEMUX_GET_POSITION:
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*va_arg( args, double * ) = (double)p_sys->i_position /
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p_sys->info.samples;
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return VLC_SUCCESS;
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case DEMUX_GET_TIME:
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*va_arg( args, vlc_tick_t * ) =
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vlc_tick_from_samples(p_sys->i_position, p_sys->info.sample_freq);
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return VLC_SUCCESS;
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case DEMUX_SET_POSITION:
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{
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mpc_uint64_t i64 = va_arg( args, double ) * p_sys->info.samples;
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if( mpc_demux_seek_sample( p_sys->decoder, i64 ) )
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{
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p_sys->i_position = i64;
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return VLC_SUCCESS;
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}
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return VLC_EGENERIC;
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}
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case DEMUX_SET_TIME:
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{
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vlc_tick_t i64 = va_arg( args, vlc_tick_t );
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if( mpc_demux_seek_sample( p_sys->decoder, i64 ) )
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{
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p_sys->i_position = i64;
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return VLC_SUCCESS;
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}
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return VLC_EGENERIC;
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}
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case DEMUX_CAN_PAUSE:
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case DEMUX_SET_PAUSE_STATE:
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case DEMUX_CAN_CONTROL_PACE:
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case DEMUX_GET_PTS_DELAY:
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return demux_vaControlHelper( p_demux->s, 0, -1, 0, 1, i_query, args );
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default:
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return VLC_EGENERIC;
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}
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}
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mpc_int32_t ReaderRead(mpc_reader *p_private, void *dst, mpc_int32_t i_size)
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{
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stream_t *stream = p_private->data;
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return vlc_stream_Read( stream, dst, i_size );
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}
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mpc_bool_t ReaderSeek(mpc_reader *p_private, mpc_int32_t i_offset)
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{
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stream_t *stream = p_private->data;
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return !vlc_stream_Seek( stream, i_offset );
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}
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mpc_int32_t ReaderTell(mpc_reader *p_private)
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{
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stream_t *stream = p_private->data;
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return vlc_stream_Tell( stream );
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}
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mpc_int32_t ReaderGetSize(mpc_reader *p_private)
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{
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stream_t *stream = p_private->data;
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return stream_Size( stream );
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}
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mpc_bool_t ReaderCanSeek(mpc_reader *p_private)
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{
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stream_t *stream = p_private->data;
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bool b_canseek;
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vlc_stream_Control( stream, STREAM_CAN_SEEK, &b_canseek );
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return b_canseek;
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}
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