/***************************************************************************** * wav.c : wav file input module for vlc ***************************************************************************** * Copyright (C) 2001-2003 the VideoLAN team * $Id: wav.c 16439 2006-08-30 19:33:55Z hartman $ * * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/ /***************************************************************************** * Preamble *****************************************************************************/ #include /* malloc(), free() */ #include #include #include #include /***************************************************************************** * Module descriptor *****************************************************************************/ static int Open ( vlc_object_t * ); static void Close( vlc_object_t * ); vlc_module_begin(); set_description( _("WAV demuxer") ); set_category( CAT_INPUT ); set_subcategory( SUBCAT_INPUT_DEMUX ); set_capability( "demux2", 142 ); set_callbacks( Open, Close ); vlc_module_end(); /***************************************************************************** * Local prototypes *****************************************************************************/ static int Demux ( demux_t * ); static int Control( demux_t *, int i_query, va_list args ); struct demux_sys_t { es_format_t fmt; es_out_id_t *p_es; int64_t i_data_pos; unsigned int i_data_size; unsigned int i_frame_size; int i_frame_samples; date_t pts; uint32_t i_channel_mask; vlc_bool_t b_chan_reorder; /* do we need channel reordering */ int pi_chan_table[AOUT_CHAN_MAX]; }; #define __EVEN( x ) ( ( (x)%2 != 0 ) ? ((x)+1) : (x) ) static int ChunkFind( demux_t *, char *, unsigned int * ); static void FrameInfo_IMA_ADPCM( demux_t *, unsigned int *, int * ); static void FrameInfo_MS_ADPCM ( demux_t *, unsigned int *, int * ); static void FrameInfo_PCM ( demux_t *, unsigned int *, int * ); static const uint32_t pi_channels_src[] = { WAVE_SPEAKER_FRONT_LEFT, WAVE_SPEAKER_FRONT_RIGHT, WAVE_SPEAKER_FRONT_CENTER, WAVE_SPEAKER_LOW_FREQUENCY, WAVE_SPEAKER_BACK_LEFT, WAVE_SPEAKER_BACK_RIGHT, WAVE_SPEAKER_SIDE_LEFT, WAVE_SPEAKER_SIDE_RIGHT, 0 }; static const uint32_t pi_channels_in[] = { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT, AOUT_CHAN_CENTER, AOUT_CHAN_LFE, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT, 0 }; static const uint32_t pi_channels_out[] = { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT, AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 }; /***************************************************************************** * 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 *p_peek; unsigned int i_size, i_extended; char *psz_name; WAVEFORMATEXTENSIBLE *p_wf_ext; WAVEFORMATEX *p_wf; /* Is it a wav file ? */ if( stream_Peek( p_demux->s, &p_peek, 12 ) < 12 ) return VLC_EGENERIC; if( memcmp( p_peek, "RIFF", 4 ) || memcmp( &p_peek[8], "WAVE", 4 ) ) { return VLC_EGENERIC; } p_demux->pf_demux = Demux; p_demux->pf_control = Control; p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) ); p_sys->p_es = NULL; p_sys->b_chan_reorder = 0; p_sys->i_channel_mask = 0; /* skip riff header */ stream_Read( p_demux->s, NULL, 12 ); /* cannot fail as peek succeed */ /* search fmt chunk */ if( ChunkFind( p_demux, "fmt ", &i_size ) ) { msg_Err( p_demux, "cannot find 'fmt ' chunk" ); goto error; } if( i_size < sizeof( WAVEFORMATEX ) - 2 ) /* XXX -2 isn't a typo */ { msg_Err( p_demux, "invalid 'fmt ' chunk" ); goto error; } stream_Read( p_demux->s, NULL, 8 ); /* Cannot fail */ /* load waveformatex */ p_wf_ext = malloc( __EVEN( i_size ) + 2 ); p_wf = (WAVEFORMATEX *)p_wf_ext; p_wf->cbSize = 0; if( stream_Read( p_demux->s, p_wf, __EVEN( i_size ) ) < (int)__EVEN( i_size ) ) { msg_Err( p_demux, "cannot load 'fmt ' chunk" ); goto error; } es_format_Init( &p_sys->fmt, AUDIO_ES, 0 ); wf_tag_to_fourcc( GetWLE( &p_wf->wFormatTag ), &p_sys->fmt.i_codec, &psz_name ); p_sys->fmt.audio.i_channels = GetWLE ( &p_wf->nChannels ); p_sys->fmt.audio.i_rate = GetDWLE( &p_wf->nSamplesPerSec ); p_sys->fmt.audio.i_blockalign = GetWLE( &p_wf->nBlockAlign ); p_sys->fmt.i_bitrate = GetDWLE( &p_wf->nAvgBytesPerSec ) * 8; p_sys->fmt.audio.i_bitspersample = GetWLE( &p_wf->wBitsPerSample ); p_sys->fmt.i_extra = GetWLE( &p_wf->cbSize ); i_extended = 0; /* Handle new WAVE_FORMAT_EXTENSIBLE wav files */ /* see the following link for more information: * http://www.microsoft.com/whdc/device/audio/multichaud.mspx#EFAA */ if( GetWLE( &p_wf->wFormatTag ) == WAVE_FORMAT_EXTENSIBLE && i_size >= sizeof( WAVEFORMATEXTENSIBLE ) ) { unsigned i, i_channel_mask; GUID guid_subformat; guid_subformat = p_wf_ext->SubFormat; guid_subformat.Data1 = GetDWLE( &p_wf_ext->SubFormat.Data1 ); guid_subformat.Data2 = GetWLE( &p_wf_ext->SubFormat.Data2 ); guid_subformat.Data3 = GetWLE( &p_wf_ext->SubFormat.Data3 ); sf_tag_to_fourcc( &guid_subformat, &p_sys->fmt.i_codec, &psz_name ); i_extended = sizeof( WAVEFORMATEXTENSIBLE ) - sizeof( WAVEFORMATEX ); p_sys->fmt.i_extra -= i_extended; i_channel_mask = GetDWLE( &p_wf_ext->dwChannelMask ); if( i_channel_mask ) { for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ ) { if( i_channel_mask & pi_channels_src[i] ) p_sys->i_channel_mask |= pi_channels_in[i]; } if( p_sys->fmt.i_codec == VLC_FOURCC('a','r','a','w') || p_sys->fmt.i_codec == VLC_FOURCC('p','c','m',' ') || p_sys->fmt.i_codec == VLC_FOURCC('a','f','l','t') ) p_sys->b_chan_reorder = aout_CheckChannelReorder( pi_channels_in, pi_channels_out, p_sys->i_channel_mask, p_sys->fmt.audio.i_channels, p_sys->pi_chan_table ); msg_Dbg( p_demux, "channel mask: %x, reordering: %i", p_sys->i_channel_mask, (int)p_sys->b_chan_reorder ); } p_sys->fmt.audio.i_physical_channels = p_sys->fmt.audio.i_original_channels = p_sys->i_channel_mask; } if( p_sys->fmt.i_extra > 0 ) { p_sys->fmt.p_extra = malloc( p_sys->fmt.i_extra ); memcpy( p_sys->fmt.p_extra, ((uint8_t *)p_wf) + i_extended, p_sys->fmt.i_extra ); } msg_Dbg( p_demux, "format: 0x%4.4x, fourcc: %4.4s, channels: %d, " "freq: %d Hz, bitrate: %dKo/s, blockalign: %d, bits/samples: %d, " "extra size: %d", GetWLE( &p_wf->wFormatTag ), (char *)&p_sys->fmt.i_codec, p_sys->fmt.audio.i_channels, p_sys->fmt.audio.i_rate, p_sys->fmt.i_bitrate / 8 / 1024, p_sys->fmt.audio.i_blockalign, p_sys->fmt.audio.i_bitspersample, p_sys->fmt.i_extra ); free( p_wf ); switch( p_sys->fmt.i_codec ) { case VLC_FOURCC( 'a', 'r', 'a', 'w' ): case VLC_FOURCC( 'a', 'f', 'l', 't' ): case VLC_FOURCC( 'u', 'l', 'a', 'w' ): case VLC_FOURCC( 'a', 'l', 'a', 'w' ): case VLC_FOURCC( 'm', 'l', 'a', 'w' ): case VLC_FOURCC( 'p', 'c', 'm', ' ' ): FrameInfo_PCM( p_demux, &p_sys->i_frame_size, &p_sys->i_frame_samples ); break; case VLC_FOURCC( 'm', 's', 0x00, 0x02 ): FrameInfo_MS_ADPCM( p_demux, &p_sys->i_frame_size, &p_sys->i_frame_samples ); break; case VLC_FOURCC( 'm', 's', 0x00, 0x11 ): FrameInfo_IMA_ADPCM( p_demux, &p_sys->i_frame_size, &p_sys->i_frame_samples ); break; case VLC_FOURCC( 'm', 's', 0x00, 0x61 ): case VLC_FOURCC( 'm', 's', 0x00, 0x62 ): /* FIXME not sure at all FIXME */ FrameInfo_MS_ADPCM( p_demux, &p_sys->i_frame_size, &p_sys->i_frame_samples ); break; case VLC_FOURCC( 'm', 'p', 'g', 'a' ): case VLC_FOURCC( 'a', '5', '2', ' ' ): /* FIXME set end of area FIXME */ goto relay; default: msg_Err( p_demux, "unsupported codec (%4.4s)", (char*)&p_sys->fmt.i_codec ); goto error; } msg_Dbg( p_demux, "found %s audio format", psz_name ); if( ChunkFind( p_demux, "data", &p_sys->i_data_size ) ) { msg_Err( p_demux, "cannot find 'data' chunk" ); goto error; } stream_Read( p_demux->s, NULL, 8 ); /* Cannot fail */ p_sys->i_data_pos = stream_Tell( p_demux->s ); if( p_sys->fmt.i_bitrate { p_sys->fmt.i_bitrate = (mtime_t)p_sys->i_frame_size * p_sys->fmt.audio.i_rate * 8 / p_sys->i_frame_samples; } p_sys->p_es = es_out_Add( p_demux->out, &p_sys->fmt ); date_Init( &p_sys->pts, p_sys->fmt.audio.i_rate, 1 ); date_Set( &p_sys->pts, 1 ); return VLC_SUCCESS; error: relay: 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; int64_t i_pos; block_t *p_block; i_pos = stream_Tell( p_demux->s ); if( p_sys->i_data_size > 0 && i_pos >= p_sys->i_data_pos + p_sys->i_data_size ) { /* EOF */ return 0; } if( ( p_block = stream_Block( p_demux->s, p_sys->i_frame_size ) ) == NULL ) { msg_Warn( p_demux, "cannot read data" ); return 0; } p_block->i_dts = p_block->i_pts = date_Increment( &p_sys->pts, p_sys->i_frame_samples ); /* set PCR */ es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts ); /* Do the channel reordering */ if( p_sys->b_chan_reorder ) aout_ChannelReorder( p_block->p_buffer, p_block->i_buffer, p_sys->fmt.audio.i_channels, p_sys->pi_chan_table, p_sys->fmt.audio.i_bitspersample ); es_out_Send( p_demux->out, p_sys->p_es, p_block ); 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; int64_t i_end = -1; if( p_sys->i_data_size > 0 ) { i_end = p_sys->i_data_pos + p_sys->i_data_size; } return demux2_vaControlHelper( p_demux->s, p_sys->i_data_pos, i_end, p_sys->fmt.i_bitrate, p_sys->fmt.audio.i_blockalign, i_query, args ); } /***************************************************************************** * Local functions *****************************************************************************/ static int ChunkFind( demux_t *p_demux, char *fcc, unsigned int *pi_size ) { uint8_t *p_peek; for( ;; ) { int i_size; if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 ) { msg_Err( p_demux, "cannot peek()" ); return VLC_EGENERIC; } i_size = GetDWLE( p_peek + 4 ); msg_Dbg( p_demux, "chunk: fcc=`%4.4s` size=%d", p_peek, i_size ); if( !memcmp( p_peek, fcc, 4 ) ) { if( pi_size ) { *pi_size = i_size; } return VLC_SUCCESS; } i_size = __EVEN( i_size ) + 8; if( stream_Read( p_demux->s, NULL, i_size ) != i_size ) { return VLC_EGENERIC; } } } static void FrameInfo_PCM( demux_t *p_demux, unsigned int *pi_size, int *pi_samples ) { demux_sys_t *p_sys = p_demux->p_sys; int i_bytes, i_modulo; /* read samples for 50ms of */ *pi_samples = __MAX( p_sys->fmt.audio.i_rate / 20, 1 ); i_bytes = *pi_samples * p_sys->fmt.audio.i_channels * ( (p_sys->fmt.audio.i_bitspersample + 7) / 8 ); if( p_sys->fmt.audio.i_blockalign > 0 ) { if( ( i_modulo = i_bytes % p_sys->fmt.audio.i_blockalign ) != 0 ) { i_bytes += p_sys->fmt.audio.i_blockalign - i_modulo; } } *pi_size = i_bytes; } static void FrameInfo_MS_ADPCM( demux_t *p_demux, unsigned int *pi_size, int *pi_samples ) { demux_sys_t *p_sys = p_demux->p_sys; *pi_samples = 2 + 2 * ( p_sys->fmt.audio.i_blockalign - 7 * p_sys->fmt.audio.i_channels ) / p_sys->fmt.audio.i_channels; *pi_size = p_sys->fmt.audio.i_blockalign; } static void FrameInfo_IMA_ADPCM( demux_t *p_demux, unsigned int *pi_size, int *pi_samples ) { demux_sys_t *p_sys = p_demux->p_sys; *pi_samples = 2 * ( p_sys->fmt.audio.i_blockalign - 4 * p_sys->fmt.audio.i_channels ) / p_sys->fmt.audio.i_channels; *pi_size = p_sys->fmt.audio.i_blockalign; }
