/***************************************************************************** * au.c : au file input module for vlc ***************************************************************************** * Copyright (C) 2001-2007 VLC authors and VideoLAN * $Id$ * * Authors: Laurent Aimar * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/ /***************************************************************************** * Preamble *****************************************************************************/ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include /* TODO: * - all adpcm things (I _NEED_ samples) * - ... */ /***************************************************************************** * Module descriptor *****************************************************************************/ static int Open ( vlc_object_t * ); static void Close( vlc_object_t * ); vlc_module_begin () set_category( CAT_INPUT ) set_subcategory( SUBCAT_INPUT_DEMUX ) set_description( N_("AU demuxer") ) set_capability( "demux", 10 ) set_callbacks( Open, Close ) add_shortcut( "au" ) vlc_module_end () /***************************************************************************** * Local prototypes *****************************************************************************/ enum AuType_e { AU_UNKNOWN = 0, AU_MULAW_8 = 1, /* 8-bit ISDN u-law */ AU_LINEAR_8 = 2, /* 8-bit linear PCM */ AU_LINEAR_16 = 3, /* 16-bit linear PCM */ AU_LINEAR_24 = 4, /* 24-bit linear PCM */ AU_LINEAR_32 = 5, /* 32-bit linear PCM */ AU_FLOAT = 6, /* 32-bit IEEE floating point */ AU_DOUBLE = 7, /* 64-bit IEEE floating point */ AU_ADPCM_G721 = 23, /* 4-bit CCITT g.721 ADPCM */ AU_ADPCM_G722 = 24, /* CCITT g.722 ADPCM */ AU_ADPCM_G723_3 = 25, /* CCITT g.723 3-bit ADPCM */ AU_ADPCM_G723_5 = 26, /* CCITT g.723 5-bit ADPCM */ AU_ALAW_8 = 27 /* 8-bit ISDN A-law */ }; enum AuCat_e { AU_CAT_UNKNOWN = 0, AU_CAT_PCM = 1, AU_CAT_ADPCM = 2 }; struct demux_sys_t { es_format_t fmt; es_out_id_t *es; vlc_tick_t i_time; int i_frame_size; vlc_tick_t i_frame_length; uint32_t i_header_size; }; static int Demux( 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 ) { demux_t *p_demux = (demux_t*)p_this; demux_sys_t *p_sys; uint8_t hdr[20]; const uint8_t *p_peek; int i_cat; if( vlc_stream_Peek( p_demux->s , &p_peek, 4 ) < 4 ) return VLC_EGENERIC; if( memcmp( p_peek, ".snd", 4 ) ) return VLC_EGENERIC; /* skip signature */ if( vlc_stream_Read( p_demux->s, NULL, 4 ) < 4 ) return VLC_EGENERIC; /* read header */ if( vlc_stream_Read( p_demux->s, hdr, 20 ) < 20 ) { msg_Err( p_demux, "cannot read" ); return VLC_EGENERIC; } if( GetDWBE( &hdr[0] ) < 24 ) { msg_Err( p_demux, "invalid file" ); return VLC_EGENERIC; } p_sys = malloc( sizeof (*p_sys) ); if( unlikely(p_sys == NULL) ) return VLC_ENOMEM; p_sys->i_time = 0; p_sys->i_header_size = GetDWBE( &hdr[0] ); /* skip extra header data */ if( p_sys->i_header_size > 24 ) { #if (SSIZE_MAX <= INT32_MAX) if( p_sys->i_header_size > SSIZE_MAX ) goto error; #endif size_t skip = p_sys->i_header_size - 24; if( vlc_stream_Read( p_demux->s, NULL, skip ) < (ssize_t)skip ) goto error; } /* init fmt */ es_format_Init( &p_sys->fmt, AUDIO_ES, 0 ); 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_CODEC_ALAW; p_sys->fmt.audio.i_bitspersample = 8; p_sys->fmt.audio.i_blockalign = 1 * p_sys->fmt.audio.i_channels; i_cat = AU_CAT_PCM; break; case AU_MULAW_8: /* 8-bit ISDN u-law */ p_sys->fmt.i_codec = VLC_CODEC_MULAW; p_sys->fmt.audio.i_bitspersample = 8; p_sys->fmt.audio.i_blockalign = 1 * p_sys->fmt.audio.i_channels; i_cat = AU_CAT_PCM; break; case AU_LINEAR_8: /* 8-bit linear PCM */ p_sys->fmt.i_codec = VLC_CODEC_S8; p_sys->fmt.audio.i_bitspersample = 8; p_sys->fmt.audio.i_blockalign = 1 * p_sys->fmt.audio.i_channels; i_cat = AU_CAT_PCM; break; case AU_LINEAR_16: /* 16-bit linear PCM */ p_sys->fmt.i_codec = VLC_CODEC_S16B; p_sys->fmt.audio.i_bitspersample = 16; p_sys->fmt.audio.i_blockalign = 2 * p_sys->fmt.audio.i_channels; i_cat = AU_CAT_PCM; break; case AU_LINEAR_24: /* 24-bit linear PCM */ p_sys->fmt.i_codec = VLC_CODEC_S24B; p_sys->fmt.audio.i_bitspersample = 24; p_sys->fmt.audio.i_blockalign = 3 * p_sys->fmt.audio.i_channels; i_cat = AU_CAT_PCM; break; case AU_LINEAR_32: /* 32-bit linear PCM */ p_sys->fmt.i_codec = VLC_CODEC_S32B; p_sys->fmt.audio.i_bitspersample = 32; p_sys->fmt.audio.i_blockalign = 4 * p_sys->fmt.audio.i_channels; i_cat = AU_CAT_PCM; break; case AU_FLOAT: /* 32-bit IEEE floating point */ p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_FLOAT ); p_sys->fmt.audio.i_bitspersample = 32; p_sys->fmt.audio.i_blockalign = 4 * p_sys->fmt.audio.i_channels; i_cat = AU_CAT_PCM; break; case AU_DOUBLE: /* 64-bit IEEE floating point */ p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_DOUBLE ); p_sys->fmt.audio.i_bitspersample = 64; p_sys->fmt.audio.i_blockalign = 8 * p_sys->fmt.audio.i_channels; i_cat = AU_CAT_PCM; break; case AU_ADPCM_G721: /* 4-bit CCITT g.721 ADPCM */ p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G721 ); p_sys->fmt.audio.i_bitspersample = 0; p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels; i_cat = AU_CAT_ADPCM; break; case AU_ADPCM_G722: /* CCITT g.722 ADPCM */ p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G722 ); p_sys->fmt.audio.i_bitspersample = 0; p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels; i_cat = AU_CAT_ADPCM; break; case AU_ADPCM_G723_3: /* CCITT g.723 3-bit ADPCM */ p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G723_3 ); p_sys->fmt.audio.i_bitspersample = 0; p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels; i_cat = AU_CAT_ADPCM; break; case AU_ADPCM_G723_5: /* CCITT g.723 5-bit ADPCM */ p_sys->fmt.i_codec = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G723_5 ); p_sys->fmt.audio.i_bitspersample = 0; p_sys->fmt.audio.i_blockalign = 0 * p_sys->fmt.audio.i_channels; i_cat = AU_CAT_ADPCM; break; default: msg_Warn( p_demux, "unknown 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; break; } p_sys->fmt.i_bitrate = p_sys->fmt.audio.i_rate * p_sys->fmt.audio.i_channels * p_sys->fmt.audio.i_bitspersample; if( i_cat == AU_CAT_UNKNOWN || i_cat == AU_CAT_ADPCM ) { msg_Err( p_demux, "unsupported codec/type (Please report it)" ); goto error; } if( p_sys->fmt.audio.i_rate == 0 ) { msg_Err( p_demux, "invalid samplerate: 0" ); goto error; } /* add the es */ p_sys->es = es_out_Add( p_demux->out, &p_sys->fmt ); /* calculate 50ms frame size/time */ unsigned 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 ) { unsigned mod = p_sys->i_frame_size % p_sys->fmt.audio.i_blockalign; if( mod != 0 ) { p_sys->i_frame_size += p_sys->fmt.audio.i_blockalign - mod; } } p_sys->i_frame_length = (vlc_tick_t)1000000 * (vlc_tick_t)i_samples / (vlc_tick_t)p_sys->fmt.audio.i_rate; p_demux->p_sys = p_sys; p_demux->pf_demux = Demux; p_demux->pf_control = Control; return VLC_SUCCESS; error: free( p_sys ); return VLC_EGENERIC; } /***************************************************************************** * Demux: read packet and send them to decoders ***************************************************************************** * 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_block; /* set PCR */ es_out_SetPCR( p_demux->out, VLC_TICK_0 + p_sys->i_time ); p_block = vlc_stream_Block( p_demux->s, p_sys->i_frame_size ); if( p_block == NULL ) { msg_Warn( p_demux, "cannot read data" ); return 0; } p_block->i_dts = p_block->i_pts = VLC_TICK_0 + p_sys->i_time; es_out_Send( p_demux->out, p_sys->es, p_block ); p_sys->i_time += p_sys->i_frame_length; return 1; } /***************************************************************************** * 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 ); } /***************************************************************************** * Control: *****************************************************************************/ static int Control( demux_t *p_demux, int i_query, va_list args ) { demux_sys_t *p_sys = p_demux->p_sys; return demux_vaControlHelper( p_demux->s, p_sys->i_header_size, -1, p_sys->fmt.i_bitrate, p_sys->fmt.audio.i_blockalign, i_query, args ); }