diff --git a/modules/demux/Modules.am b/modules/demux/Modules.am index 9f52fc61a02970720ca31bf2b3bcef9cad7c7cb9..7506684160220a5f21ab753dd3e2802f08561abc 100644 --- a/modules/demux/Modules.am +++ b/modules/demux/Modules.am @@ -19,3 +19,4 @@ SOURCES_ps2 = ps.c ps.h SOURCES_dvdnav = dvdnav.c SOURCES_mod = mod.c SOURCES_pva = pva.c +SOURCES_aiff = aiff.c diff --git a/modules/demux/aiff.c b/modules/demux/aiff.c new file mode 100644 index 0000000000000000000000000000000000000000..ca540d4ecea74eb1a717a9c43e4b55f3a7e86878 --- /dev/null +++ b/modules/demux/aiff.c @@ -0,0 +1,347 @@ +/***************************************************************************** + * aiff.c: Audio Interchange File Format demuxer + ***************************************************************************** + * Copyright (C) 2004 VideoLAN + * $Id: aiff.c,v 1.1 2004/01/28 12:25:37 fenrir Exp $ + * + * Authors: Laurent Aimar + * + * 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 /* malloc(), free() */ + +#include +#include + +/* TODO: + * - ... + */ + +/***************************************************************************** + * Module descriptor + *****************************************************************************/ +static int Open ( vlc_object_t * ); +static void Close ( vlc_object_t * ); + +vlc_module_begin(); + set_description( _("AIFF demuxer" ) ); + set_capability( "demux2", 10 ); + set_callbacks( Open, Close ); + add_shortcut( "aiff" ); +vlc_module_end(); + +/***************************************************************************** + * Local prototypes + *****************************************************************************/ + +struct demux_sys_t +{ + es_format_t fmt; + es_out_id_t *es; + + int64_t i_ssnd_pos; + int64_t i_ssnd_size; + int i_ssnd_offset; + int i_ssnd_blocksize; + + /* real data start */ + int64_t i_ssnd_start; + int64_t i_ssnd_end; + + int i_ssnd_fsize; + + int64_t i_time; +}; + +static int Demux ( demux_t *p_demux ); +static int Control( demux_t *p_demux, int i_query, va_list args ); + +/* GetF80BE: read a 80 bits float in big endian */ +static unsigned int GetF80BE( uint8_t p[10] ) +{ + unsigned int i_mantissa = GetDWBE( &p[2] ); + int i_exp = 30 - p[1]; + unsigned int i_last = 0; + + while( i_exp-- ) + { + i_last = i_mantissa; + i_mantissa >>= 1; + } + if( i_last&0x01 ) + { + i_mantissa++; + } + return i_mantissa; +} + +/***************************************************************************** + * Open + *****************************************************************************/ +static int Open( vlc_object_t *p_this ) +{ + demux_t *p_demux = (demux_t*)p_this; + demux_sys_t *p_sys; + + uint8_t *p_peek; + + if( stream_Peek( p_demux->s, &p_peek, 12 ) < 12 ) + { + msg_Err( p_demux, "cannot peek" ); + return VLC_EGENERIC; + } + if( strncmp( &p_peek[0], "FORM", 4 ) || strncmp( &p_peek[8], "AIFF", 4 ) ) + { + msg_Warn( p_demux, "AIFF module discarded" ); + return VLC_EGENERIC; + } + + /* skip aiff header */ + stream_Read( p_demux->s, NULL, 12 ); + + /* 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 ) ); + + es_format_Init( &p_sys->fmt, UNKNOWN_ES, 0 ); + p_sys->i_time = 1; + p_sys->i_ssnd_pos = -1; + + for( ;; ) + { + uint32_t i_size; + + if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 ) + { + msg_Dbg( p_demux, "cannot peek()" ); + goto error; + } + i_size = GetDWBE( &p_peek[4] ); + + msg_Dbg( p_demux, "chunk fcc=%4.4s size=%d", p_peek, i_size ); + + if( !strncmp( &p_peek[0], "COMM", 4 ) ) + { + if( stream_Peek( p_demux->s, &p_peek, 18 + 8 ) < 18 + 8 ) + { + msg_Dbg( p_demux, "cannot peek()" ); + goto error; + } + es_format_Init( &p_sys->fmt, AUDIO_ES, VLC_FOURCC( 't', 'w', 'o', 's' ) ); + p_sys->fmt.audio.i_channels = GetWBE( &p_peek[8] ); + p_sys->fmt.audio.i_bitspersample = GetWBE( &p_peek[14] ); + p_sys->fmt.audio.i_rate = GetF80BE( &p_peek[16] ); + + msg_Dbg( p_demux, "COMM: channels=%d samples_frames=%d bits=%d rate=%d", + GetWBE( &p_peek[8] ), GetDWBE( &p_peek[10] ), GetWBE( &p_peek[14] ), GetF80BE( &p_peek[16] ) ); + } + else if( !strncmp( &p_peek[0], "SSND", 4 ) ) + { + if( stream_Peek( p_demux->s, &p_peek, 8 + 8 ) < 8 + 8 ) + { + msg_Dbg( p_demux, "cannot peek()" ); + goto error; + } + + p_sys->i_ssnd_pos = stream_Tell( p_demux->s ); + p_sys->i_ssnd_size= i_size; + p_sys->i_ssnd_offset = GetDWBE( &p_peek[8] ); + p_sys->i_ssnd_blocksize = GetDWBE( &p_peek[12] ); + + msg_Dbg( p_demux, "SSND: (offset=%d blocksize=%d)", + p_sys->i_ssnd_offset, p_sys->i_ssnd_blocksize ); + } + if( p_sys->i_ssnd_pos >= 12 && p_sys->fmt.i_cat == AUDIO_ES ) + { + /* We have found the 2 needed chunks */ + break; + } + + /* Skip this chunk */ + if( stream_Read( p_demux->s, NULL, i_size + 8 ) != i_size + 8 ) + { + msg_Warn( p_demux, "incomplete file" ); + goto error; + } + } + + p_sys->i_ssnd_start = p_sys->i_ssnd_pos + 16 + p_sys->i_ssnd_offset; + p_sys->i_ssnd_end = p_sys->i_ssnd_start + p_sys->i_ssnd_size; + + p_sys->i_ssnd_fsize = p_sys->fmt.audio.i_channels * + ( p_sys->fmt.audio.i_bitspersample + 7 ) / 8; + + if( p_sys->i_ssnd_fsize <= 0 ) + { + msg_Err( p_demux, "invalid audio parameters" ); + goto error; + } + + if( p_sys->i_ssnd_size <= 0 ) + { + /* unknown */ + p_sys->i_ssnd_end = 0; + } + + /* seek into SSND chunk */ + if( stream_Seek( p_demux->s, p_sys->i_ssnd_start ) ) + { + msg_Err( p_demux, "cannot seek to data chunk" ); + goto error; + } + + /* */ + p_sys->es = es_out_Add( p_demux->out, &p_sys->fmt ); + + return VLC_SUCCESS; + +error: + free( p_sys ); + return VLC_EGENERIC; +} + +/***************************************************************************** + * 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; + + free( p_sys ); +} + + +/***************************************************************************** + * Demux: + *****************************************************************************/ +static int Demux( demux_t *p_demux ) +{ + demux_sys_t *p_sys = p_demux->p_sys; + int64_t i_tell = stream_Tell( p_demux->s ); + + block_t *p_block; + int i_read; + + if( p_sys->i_ssnd_end > 0 && i_tell >= p_sys->i_ssnd_end ) + { + /* EOF */ + return 0; + } + + /* Set PCR */ + es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_time); + + /* we will read 100ms at once */ + i_read = p_sys->i_ssnd_fsize * ( p_sys->fmt.audio.i_rate / 10 ); + if( p_sys->i_ssnd_end > 0 && p_sys->i_ssnd_end - i_tell < i_read ) + { + i_read = p_sys->i_ssnd_end - i_tell; + } + if( ( p_block = stream_Block( p_demux->s, i_read ) ) == NULL ) + { + return 0; + } + + p_block->i_dts = + p_block->i_pts = p_sys->i_time; + + p_sys->i_time += (int64_t)1000000 * + p_block->i_buffer / + p_sys->i_ssnd_fsize / + p_sys->fmt.audio.i_rate; + + /* */ + es_out_Send( p_demux->out, p_sys->es, p_block ); + 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 *pi64; + + switch( i_query ) + { + case DEMUX_GET_POSITION: + { + int64_t i_start = p_sys->i_ssnd_start; + int64_t i_end = p_sys->i_ssnd_end > 0 ? p_sys->i_ssnd_end : stream_Size( p_demux->s ); + int64_t i_tell = stream_Tell( p_demux->s ); + + pf = (double*) va_arg( args, double* ); + + if( i_start < i_end ) + { + *pf = (double)(i_tell - i_start)/(double)(i_end - i_start); + return VLC_SUCCESS; + } + return VLC_EGENERIC; + } + + case DEMUX_SET_POSITION: + { + int64_t i_start = p_sys->i_ssnd_start; + int64_t i_end = p_sys->i_ssnd_end > 0 ? p_sys->i_ssnd_end : stream_Size( p_demux->s ); + + f = (double) va_arg( args, double ); + + if( i_start < i_end ) + { + int i_frame = (f * ( i_end - i_start )) / p_sys->i_ssnd_fsize; + int64_t i_new = i_start + i_frame * p_sys->i_ssnd_fsize; + + if( stream_Seek( p_demux->s, i_new ) ) + { + return VLC_EGENERIC; + } + p_sys->i_time = 1 + (int64_t)1000000 * i_frame / p_sys->fmt.audio.i_rate; + 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: + { + int64_t i_end = p_sys->i_ssnd_end > 0 ? p_sys->i_ssnd_end : stream_Size( p_demux->s ); + + pi64 = (int64_t*)va_arg( args, int64_t * ); + if( p_sys->i_ssnd_start < i_end ) + { + *pi64 = (int64_t)1000000 * ( i_end - p_sys->i_ssnd_start ) / p_sys->i_ssnd_fsize / p_sys->fmt.audio.i_rate; + return VLC_SUCCESS; + } + return VLC_EGENERIC; + } + case DEMUX_SET_TIME: + case DEMUX_GET_FPS: + default: + return VLC_EGENERIC; + } +}