/***************************************************************************** * wav.c: wav muxer module for vlc ***************************************************************************** * Copyright (C) 2004, 2006 the VideoLAN team * $Id$ * * Authors: Gildas Bazin * * 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 *****************************************************************************/ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include #include /***************************************************************************** * Module descriptor *****************************************************************************/ static int Open ( vlc_object_t * ); static void Close ( vlc_object_t * ); vlc_module_begin(); set_description( N_("WAV muxer") ); set_capability( "sout mux", 5 ); set_category( CAT_SOUT ); set_subcategory( SUBCAT_SOUT_MUX ); set_callbacks( Open, Close ); add_shortcut( "wav" ); vlc_module_end(); /***************************************************************************** * Exported prototypes *****************************************************************************/ static int Control ( sout_mux_t *, int, va_list ); static int AddStream( sout_mux_t *, sout_input_t * ); static int DelStream( sout_mux_t *, sout_input_t * ); static int Mux ( sout_mux_t * ); #define MAX_CHANNELS 6 struct sout_mux_sys_t { bool b_used; bool b_header; bool b_ext; uint32_t i_data; /* Wave header for the output data */ uint32_t waveheader[5]; WAVEFORMATEXTENSIBLE waveformat; uint32_t waveheader2[2]; uint32_t i_channel_mask; bool b_chan_reorder; /* do we need channel reordering */ int pi_chan_table[AOUT_CHAN_MAX]; }; static const uint32_t pi_channels_src[] = { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT, AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, AOUT_CHAN_REARCENTER, AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 }; static const uint32_t pi_channels_in[] = { WAVE_SPEAKER_FRONT_LEFT, WAVE_SPEAKER_FRONT_RIGHT, WAVE_SPEAKER_SIDE_LEFT, WAVE_SPEAKER_SIDE_RIGHT, WAVE_SPEAKER_BACK_LEFT, WAVE_SPEAKER_BACK_RIGHT, WAVE_SPEAKER_BACK_CENTER, WAVE_SPEAKER_FRONT_CENTER, WAVE_SPEAKER_LOW_FREQUENCY, 0 }; static const uint32_t pi_channels_out[] = { 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_BACK_CENTER, WAVE_SPEAKER_SIDE_LEFT, WAVE_SPEAKER_SIDE_RIGHT, 0 }; /***************************************************************************** * Open: *****************************************************************************/ static int Open( vlc_object_t *p_this ) { sout_mux_t *p_mux = (sout_mux_t*)p_this; sout_mux_sys_t *p_sys; p_mux->pf_control = Control; p_mux->pf_addstream = AddStream; p_mux->pf_delstream = DelStream; p_mux->pf_mux = Mux; p_mux->p_sys = p_sys = malloc( sizeof( sout_mux_sys_t ) ); if( !p_sys ) return VLC_ENOMEM; p_sys->b_used = false; p_sys->b_header = true; p_sys->i_data = 0; p_sys->b_chan_reorder = 0; return VLC_SUCCESS; } /***************************************************************************** * Close: *****************************************************************************/ static void Close( vlc_object_t * p_this ) { sout_mux_t *p_mux = (sout_mux_t*)p_this; sout_mux_sys_t *p_sys = p_mux->p_sys; free( p_sys ); } static int Control( sout_mux_t *p_mux, int i_query, va_list args ) { VLC_UNUSED(p_mux); bool *pb_bool; char **ppsz; switch( i_query ) { case MUX_CAN_ADD_STREAM_WHILE_MUXING: pb_bool = (bool*)va_arg( args, bool * ); *pb_bool = false; return VLC_SUCCESS; case MUX_GET_ADD_STREAM_WAIT: pb_bool = (bool*)va_arg( args, bool * ); *pb_bool = true; return VLC_SUCCESS; case MUX_GET_MIME: ppsz = (char**)va_arg( args, char ** ); *ppsz = strdup( "audio/wav" ); return VLC_SUCCESS; default: return VLC_EGENERIC; } } static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input ) { GUID subformat_guid = {0, 0, 0x10,{0x80, 0, 0, 0xaa, 0, 0x38, 0x9b, 0x71}}; sout_mux_sys_t *p_sys = p_mux->p_sys; WAVEFORMATEX *p_waveformat = &p_sys->waveformat.Format; int i_bytes_per_sample, i_format; bool b_ext; if( p_input->p_fmt->i_cat != AUDIO_ES ) { msg_Dbg( p_mux, "not an audio stream" ); return VLC_EGENERIC; } if( p_sys->b_used ) { msg_Dbg( p_mux, "can't add more than 1 stream" ); return VLC_EGENERIC; } msg_Dbg( p_mux, "adding %i input channels, %iHz", p_input->p_fmt->audio.i_channels, p_input->p_fmt->audio.i_rate ); p_sys->i_channel_mask = 0; if( p_input->p_fmt->audio.i_physical_channels ) { unsigned int i; for( i = 0; i < sizeof(pi_channels_in)/sizeof(uint32_t); i++ ) { if( p_input->p_fmt->audio.i_physical_channels & pi_channels_src[i]) p_sys->i_channel_mask |= pi_channels_in[i]; } p_sys->b_chan_reorder = aout_CheckChannelReorder( pi_channels_in, pi_channels_out, p_sys->i_channel_mask, p_input->p_fmt->audio.i_channels, p_sys->pi_chan_table ); msg_Dbg( p_mux, "channel mask: %x, reordering: %i", p_sys->i_channel_mask, (int)p_sys->b_chan_reorder ); } i_format = p_input->p_fmt->i_codec == VLC_FOURCC('f', 'l', '3', '2') ? WAVE_FORMAT_IEEE_FLOAT : WAVE_FORMAT_PCM; b_ext = p_sys->b_ext = p_input->p_fmt->audio.i_channels > 2; /* Build a WAV header for the output data */ p_sys->waveheader[0] = VLC_FOURCC('R', 'I', 'F', 'F'); /* MainChunkID */ SetDWLE( &p_sys->waveheader[1], 0 ); /* Length */ p_sys->waveheader[2] = VLC_FOURCC('W', 'A', 'V', 'E'); /* ChunkTypeID */ p_sys->waveheader[3] = VLC_FOURCC('f', 'm', 't', ' '); /* SubChunkID */ SetDWLE( &p_sys->waveheader[4], b_ext ? 40 : 16 ); /* SubChunkLength */ p_sys->waveheader2[0] = VLC_FOURCC('d', 'a', 't', 'a'); /* DataChunkID */ SetDWLE( &p_sys->waveheader2[1], 0 ); /* DataLength */ /* Build a WAVEVFORMAT header for the output data */ memset( &p_sys->waveformat, 0, sizeof(WAVEFORMATEXTENSIBLE) ); SetWLE( &p_waveformat->wFormatTag, b_ext ? WAVE_FORMAT_EXTENSIBLE : i_format ); SetWLE( &p_waveformat->nChannels, p_input->p_fmt->audio.i_channels ); SetDWLE( &p_waveformat->nSamplesPerSec, p_input->p_fmt->audio.i_rate ); i_bytes_per_sample = p_input->p_fmt->audio.i_channels * p_input->p_fmt->audio.i_bitspersample / 8; SetDWLE( &p_waveformat->nAvgBytesPerSec, i_bytes_per_sample * p_input->p_fmt->audio.i_rate ); SetWLE( &p_waveformat->nBlockAlign, i_bytes_per_sample ); SetWLE( &p_waveformat->wBitsPerSample, p_input->p_fmt->audio.i_bitspersample ); SetWLE( &p_waveformat->cbSize, 22 ); SetWLE( &p_sys->waveformat.Samples.wValidBitsPerSample, p_input->p_fmt->audio.i_bitspersample ); SetDWLE( &p_sys->waveformat.dwChannelMask, p_sys->i_channel_mask ); p_sys->waveformat.SubFormat = subformat_guid; p_sys->waveformat.SubFormat.Data1 = i_format; p_sys->b_used = true; return VLC_SUCCESS; } static block_t *GetHeader( sout_mux_t *p_mux ) { sout_mux_sys_t *p_sys = p_mux->p_sys; block_t *p_block = block_New( p_mux, sizeof( WAVEFORMATEXTENSIBLE ) + 7 * 4 ); SetDWLE( &p_sys->waveheader[1], 20 + (p_sys->b_ext ? 40 : 16) + p_sys->i_data ); /* Length */ SetDWLE( &p_sys->waveheader2[1], p_sys->i_data ); /* DataLength */ memcpy( p_block->p_buffer, &p_sys->waveheader, 5 * 4 ); memcpy( p_block->p_buffer + 5 * 4, &p_sys->waveformat, sizeof( WAVEFORMATEXTENSIBLE ) ); memcpy( p_block->p_buffer + 5 * 4 + (p_sys->b_ext ? sizeof( WAVEFORMATEXTENSIBLE ) : 16), &p_sys->waveheader2, 2 * 4 ); if( !p_sys->b_ext ) p_block->i_buffer -= 24; return p_block; } static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input ) { VLC_UNUSED(p_input); msg_Dbg( p_mux, "removing input" ); msg_Dbg( p_mux, "writing header data" ); if( sout_AccessOutSeek( p_mux->p_access, 0 ) == VLC_SUCCESS ) { sout_AccessOutWrite( p_mux->p_access, GetHeader( p_mux ) ); } return VLC_SUCCESS; } static int Mux( sout_mux_t *p_mux ) { sout_mux_sys_t *p_sys = p_mux->p_sys; sout_input_t *p_input; if( !p_mux->i_nb_inputs ) return VLC_SUCCESS; if( p_sys->b_header ) { msg_Dbg( p_mux, "writing header data" ); sout_AccessOutWrite( p_mux->p_access, GetHeader( p_mux ) ); } p_sys->b_header = false; p_input = p_mux->pp_inputs[0]; while( block_FifoCount( p_input->p_fifo ) > 0 ) { block_t *p_block = block_FifoGet( p_input->p_fifo ); p_sys->i_data += p_block->i_buffer; /* Do the channel reordering */ if( p_sys->b_chan_reorder ) aout_ChannelReorder( p_block->p_buffer, p_block->i_buffer, p_input->p_fmt->audio.i_channels, p_sys->pi_chan_table, p_input->p_fmt->audio.i_bitspersample ); sout_AccessOutWrite( p_mux->p_access, p_block ); } return VLC_SUCCESS; }
