mirror of
https://code.videolan.org/videolan/vlc
synced 2024-09-04 09:11:33 +02:00
449fd28aaf
This improves readability a lot and prevent us from reinventing the wheel.
311 lines
10 KiB
C
311 lines
10 KiB
C
/*****************************************************************************
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* wav.c: wav muxer module for vlc
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*****************************************************************************
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* Copyright (C) 2004, 2006 the VideoLAN team
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* $Id$
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*
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* Authors: Gildas Bazin <gbazin@videolan.org>
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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/vlc.h>
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#include <vlc_aout.h>
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#include <vlc_sout.h>
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#include <vlc_block.h>
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#include <vlc_codecs.h>
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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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static void Close ( vlc_object_t * );
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vlc_module_begin();
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set_description( _("WAV muxer") );
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set_capability( "sout mux", 5 );
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set_category( CAT_SOUT );
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set_subcategory( SUBCAT_SOUT_MUX );
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set_callbacks( Open, Close );
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add_shortcut( "wav" );
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vlc_module_end();
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/*****************************************************************************
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* Exported prototypes
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*****************************************************************************/
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static int Control ( sout_mux_t *, int, va_list );
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static int AddStream( sout_mux_t *, sout_input_t * );
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static int DelStream( sout_mux_t *, sout_input_t * );
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static int Mux ( sout_mux_t * );
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#define MAX_CHANNELS 6
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struct sout_mux_sys_t
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{
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bool b_used;
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bool b_header;
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bool b_ext;
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uint32_t i_data;
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/* Wave header for the output data */
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uint32_t waveheader[5];
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WAVEFORMATEXTENSIBLE waveformat;
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uint32_t waveheader2[2];
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uint32_t i_channel_mask;
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bool b_chan_reorder; /* do we need channel reordering */
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int pi_chan_table[AOUT_CHAN_MAX];
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};
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static const uint32_t pi_channels_src[] =
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{ AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
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AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
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AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
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AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
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static const uint32_t pi_channels_in[] =
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{ WAVE_SPEAKER_FRONT_LEFT, WAVE_SPEAKER_FRONT_RIGHT,
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WAVE_SPEAKER_SIDE_LEFT, WAVE_SPEAKER_SIDE_RIGHT,
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WAVE_SPEAKER_BACK_LEFT, WAVE_SPEAKER_BACK_RIGHT,
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WAVE_SPEAKER_FRONT_CENTER, WAVE_SPEAKER_LOW_FREQUENCY, 0 };
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static const uint32_t pi_channels_out[] =
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{ WAVE_SPEAKER_FRONT_LEFT, WAVE_SPEAKER_FRONT_RIGHT,
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WAVE_SPEAKER_FRONT_CENTER, WAVE_SPEAKER_LOW_FREQUENCY,
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WAVE_SPEAKER_BACK_LEFT, WAVE_SPEAKER_BACK_RIGHT,
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WAVE_SPEAKER_SIDE_LEFT, WAVE_SPEAKER_SIDE_RIGHT, 0 };
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/*****************************************************************************
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* Open:
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*****************************************************************************/
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static int Open( vlc_object_t *p_this )
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{
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sout_mux_t *p_mux = (sout_mux_t*)p_this;
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sout_mux_sys_t *p_sys;
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p_mux->pf_control = Control;
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p_mux->pf_addstream = AddStream;
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p_mux->pf_delstream = DelStream;
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p_mux->pf_mux = Mux;
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p_mux->p_sys = p_sys = malloc( sizeof( sout_mux_sys_t ) );
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p_sys->b_used = false;
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p_sys->b_header = true;
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p_sys->i_data = 0;
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p_sys->b_chan_reorder = 0;
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return VLC_SUCCESS;
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}
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/*****************************************************************************
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* Close:
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*****************************************************************************/
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static void Close( vlc_object_t * p_this )
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{
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sout_mux_t *p_mux = (sout_mux_t*)p_this;
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sout_mux_sys_t *p_sys = p_mux->p_sys;
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free( p_sys );
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}
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static int Control( sout_mux_t *p_mux, int i_query, va_list args )
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{
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VLC_UNUSED(p_mux);
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bool *pb_bool;
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char **ppsz;
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switch( i_query )
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{
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case MUX_CAN_ADD_STREAM_WHILE_MUXING:
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pb_bool = (bool*)va_arg( args, bool * );
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*pb_bool = false;
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return VLC_SUCCESS;
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case MUX_GET_ADD_STREAM_WAIT:
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pb_bool = (bool*)va_arg( args, bool * );
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*pb_bool = true;
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return VLC_SUCCESS;
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case MUX_GET_MIME:
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ppsz = (char**)va_arg( args, char ** );
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*ppsz = strdup( "audio/wav" );
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return VLC_SUCCESS;
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default:
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return VLC_EGENERIC;
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}
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}
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static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
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{
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GUID subformat_guid = {0, 0, 0x10,{0x80, 0, 0, 0xaa, 0, 0x38, 0x9b, 0x71}};
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sout_mux_sys_t *p_sys = p_mux->p_sys;
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WAVEFORMATEX *p_waveformat = &p_sys->waveformat.Format;
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int i_bytes_per_sample, i_format;
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bool b_ext;
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if( p_input->p_fmt->i_cat != AUDIO_ES )
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{
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msg_Dbg( p_mux, "not an audio stream" );
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return VLC_EGENERIC;
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}
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if( p_sys->b_used )
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{
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msg_Dbg( p_mux, "can't add more than 1 stream" );
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return VLC_EGENERIC;
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}
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msg_Dbg( p_mux, "adding %i input channels, %iHz",
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p_input->p_fmt->audio.i_channels,
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p_input->p_fmt->audio.i_rate );
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p_sys->i_channel_mask = 0;
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if( p_input->p_fmt->audio.i_physical_channels )
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{
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unsigned int i;
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for( i = 0; i < sizeof(pi_channels_in)/sizeof(uint32_t); i++ )
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{
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if( p_input->p_fmt->audio.i_physical_channels & pi_channels_src[i])
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p_sys->i_channel_mask |= pi_channels_in[i];
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}
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p_sys->b_chan_reorder =
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aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
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p_sys->i_channel_mask,
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p_input->p_fmt->audio.i_channels,
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p_sys->pi_chan_table );
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msg_Dbg( p_mux, "channel mask: %x, reordering: %i",
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p_sys->i_channel_mask, (int)p_sys->b_chan_reorder );
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}
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i_format = p_input->p_fmt->i_codec == VLC_FOURCC('f', 'l', '3', '2') ?
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WAVE_FORMAT_IEEE_FLOAT : WAVE_FORMAT_PCM;
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b_ext = p_sys->b_ext = p_input->p_fmt->audio.i_channels > 2;
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/* Build a WAV header for the output data */
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p_sys->waveheader[0] = VLC_FOURCC('R', 'I', 'F', 'F'); /* MainChunkID */
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SetDWLE( &p_sys->waveheader[1], 0 ); /* Length */
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p_sys->waveheader[2] = VLC_FOURCC('W', 'A', 'V', 'E'); /* ChunkTypeID */
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p_sys->waveheader[3] = VLC_FOURCC('f', 'm', 't', ' '); /* SubChunkID */
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SetDWLE( &p_sys->waveheader[4], b_ext ? 40 : 16 ); /* SubChunkLength */
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p_sys->waveheader2[0] = VLC_FOURCC('d', 'a', 't', 'a'); /* DataChunkID */
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SetDWLE( &p_sys->waveheader2[1], 0 ); /* DataLength */
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/* Build a WAVEVFORMAT header for the output data */
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memset( &p_sys->waveformat, 0, sizeof(WAVEFORMATEXTENSIBLE) );
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SetWLE( &p_waveformat->wFormatTag,
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b_ext ? WAVE_FORMAT_EXTENSIBLE : i_format );
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SetWLE( &p_waveformat->nChannels,
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p_input->p_fmt->audio.i_channels );
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SetDWLE( &p_waveformat->nSamplesPerSec, p_input->p_fmt->audio.i_rate );
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i_bytes_per_sample = p_input->p_fmt->audio.i_channels *
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p_input->p_fmt->audio.i_bitspersample / 8;
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SetDWLE( &p_waveformat->nAvgBytesPerSec,
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i_bytes_per_sample * p_input->p_fmt->audio.i_rate );
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SetWLE( &p_waveformat->nBlockAlign, i_bytes_per_sample );
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SetWLE( &p_waveformat->wBitsPerSample,
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p_input->p_fmt->audio.i_bitspersample );
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SetWLE( &p_waveformat->cbSize, 22 );
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SetWLE( &p_sys->waveformat.Samples.wValidBitsPerSample,
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p_input->p_fmt->audio.i_bitspersample );
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SetDWLE( &p_sys->waveformat.dwChannelMask,
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p_sys->i_channel_mask );
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p_sys->waveformat.SubFormat = subformat_guid;
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p_sys->waveformat.SubFormat.Data1 = i_format;
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p_sys->b_used = true;
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return VLC_SUCCESS;
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}
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static block_t *GetHeader( sout_mux_t *p_mux )
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{
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sout_mux_sys_t *p_sys = p_mux->p_sys;
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block_t *p_block =
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block_New( p_mux, sizeof( WAVEFORMATEXTENSIBLE ) + 7 * 4 );
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SetDWLE( &p_sys->waveheader[1],
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20 + (p_sys->b_ext ? 40 : 16) + p_sys->i_data ); /* Length */
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SetDWLE( &p_sys->waveheader2[1], p_sys->i_data ); /* DataLength */
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memcpy( p_block->p_buffer, &p_sys->waveheader, 5 * 4 );
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memcpy( p_block->p_buffer + 5 * 4, &p_sys->waveformat,
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sizeof( WAVEFORMATEXTENSIBLE ) );
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memcpy( p_block->p_buffer + 5 * 4 +
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(p_sys->b_ext ? sizeof( WAVEFORMATEXTENSIBLE ) : 16),
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&p_sys->waveheader2, 2 * 4 );
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if( !p_sys->b_ext ) p_block->i_buffer -= 24;
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return p_block;
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}
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static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
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{
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VLC_UNUSED(p_input);
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msg_Dbg( p_mux, "removing input" );
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msg_Dbg( p_mux, "writing header data" );
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if( sout_AccessOutSeek( p_mux->p_access, 0 ) == VLC_SUCCESS )
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{
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sout_AccessOutWrite( p_mux->p_access, GetHeader( p_mux ) );
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}
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return VLC_SUCCESS;
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}
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static int Mux( sout_mux_t *p_mux )
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{
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sout_mux_sys_t *p_sys = p_mux->p_sys;
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sout_input_t *p_input;
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if( !p_mux->i_nb_inputs ) return VLC_SUCCESS;
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if( p_sys->b_header )
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{
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msg_Dbg( p_mux, "writing header data" );
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sout_AccessOutWrite( p_mux->p_access, GetHeader( p_mux ) );
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}
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p_sys->b_header = false;
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p_input = p_mux->pp_inputs[0];
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while( block_FifoCount( p_input->p_fifo ) > 0 )
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{
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block_t *p_block = block_FifoGet( p_input->p_fifo );
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p_sys->i_data += p_block->i_buffer;
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/* Do the channel reordering */
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if( p_sys->b_chan_reorder )
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aout_ChannelReorder( p_block->p_buffer, p_block->i_buffer,
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p_input->p_fmt->audio.i_channels,
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p_sys->pi_chan_table,
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p_input->p_fmt->audio.i_bitspersample );
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sout_AccessOutWrite( p_mux->p_access, p_block );
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}
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return VLC_SUCCESS;
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}
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