Christophe Massiot
24 years ago
12 changed files with 451 additions and 239 deletions
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build |
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@ -1 +1,2 @@ |
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float32tos16_SOURCES = float32tos16.c |
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a52tospdif_SOURCES = a52tospdif.c |
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/*****************************************************************************
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* a52tospdif.c : encapsulates A/52 frames into S/PDIF packets |
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***************************************************************************** |
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* Copyright (C) 2002 VideoLAN |
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* $Id: a52tospdif.c,v 1.1 2002/08/11 22:36:35 massiot Exp $ |
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* |
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* Authors: Christophe Massiot <massiot@via.ecp.fr> |
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* Stéphane Borel <stef@via.ecp.fr> |
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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., 59 Temple Place - Suite 330, Boston, MA 02111, USA. |
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*****************************************************************************/ |
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/*****************************************************************************
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* Preamble |
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*****************************************************************************/ |
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#include <errno.h> |
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#include <stdlib.h> /* malloc(), free() */ |
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#include <string.h> |
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|
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#include <vlc/vlc.h> |
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#include "audio_output.h" |
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#include "aout_internal.h" |
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|
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/*****************************************************************************
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* Local prototypes |
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*****************************************************************************/ |
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static int Create ( vlc_object_t * ); |
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static void DoWork ( aout_instance_t *, aout_filter_t *, aout_buffer_t *, |
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aout_buffer_t * ); |
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/*****************************************************************************
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* Module descriptor |
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*****************************************************************************/ |
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vlc_module_begin(); |
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set_description( _("aout filter for A/52->S/PDIF encapsulation") ); |
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set_capability( "audio filter", 10 ); |
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set_callbacks( Create, NULL ); |
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vlc_module_end(); |
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|
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/*****************************************************************************
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* Create: allocate trivial mixer |
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***************************************************************************** |
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* This function allocates and initializes a Crop vout method. |
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*****************************************************************************/ |
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static int Create( vlc_object_t *p_this ) |
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{ |
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aout_filter_t * p_filter = (aout_filter_t *)p_this; |
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if ( p_filter->input.i_format != AOUT_FMT_A52 |
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&& p_filter->output.i_format != AOUT_FMT_SPDIF ) |
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{ |
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return -1; |
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} |
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p_filter->pf_do_work = DoWork; |
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p_filter->b_in_place = 0; |
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return 0; |
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} |
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|
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/*****************************************************************************
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* DoWork: convert a buffer |
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*****************************************************************************/ |
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static void DoWork( aout_instance_t * p_aout, aout_filter_t * p_filter, |
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aout_buffer_t * p_in_buf, aout_buffer_t * p_out_buf ) |
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{ |
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static const u8 p_sync[6] = { 0x72, 0xF8, 0x1F, 0x4E, 0x01, 0x00 }; |
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u16 i_length = *(u16 *)p_in_buf->p_buffer; |
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u16 * pi_length; |
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byte_t * p_in = p_in_buf->p_buffer; |
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byte_t * p_out = p_out_buf->p_buffer; |
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/* Copy the S/PDIF headers. */ |
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memcpy( p_out, p_sync, 6 ); |
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pi_length = (u16 *)(p_out + 6); |
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*pi_length = i_length; |
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/* FIXME : if i_length is odd, the following code sucks. What should
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* we do ? --Meuuh */ |
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#ifndef WORDS_BIGENDIAN |
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# ifdef HAVE_SWAB |
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swab( p_out + 8, p_in + sizeof(u16), i_length ); |
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# else |
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p_out += 8; |
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p_in += sizeof(u16); |
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for ( i = 0; i < i_length / 2; i++ ) |
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{ |
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p_out[0] = p_in[1]; |
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p_out[1] = p_in[0]; |
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p_out += 2; p_in += 2; |
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} |
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# endif |
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#else |
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p_filter->p_vlc->pf_memcpy( p_out + 8, p_in + sizeof(u16), i_length ); |
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#endif |
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p_out_buf->i_nb_samples = p_in_buf->i_nb_samples; /* == 1 */ |
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} |
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@ -1 +1,2 @@ |
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trivial_SOURCES = trivial.c |
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spdif_SOURCES = spdif.c |
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@ -0,0 +1,78 @@ |
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/*****************************************************************************
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* spdif.c : dummy mixer for S/PDIF output (1 input only) |
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***************************************************************************** |
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* Copyright (C) 2002 VideoLAN |
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* $Id: spdif.c,v 1.1 2002/08/11 22:36:35 massiot Exp $ |
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* |
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* Authors: Christophe Massiot <massiot@via.ecp.fr> |
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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., 59 Temple Place - Suite 330, Boston, MA 02111, USA. |
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*****************************************************************************/ |
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|
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/*****************************************************************************
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* Preamble |
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*****************************************************************************/ |
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#include <errno.h> |
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#include <stdlib.h> /* malloc(), free() */ |
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#include <string.h> |
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|
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#include <vlc/vlc.h> |
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#include "audio_output.h" |
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#include "aout_internal.h" |
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|
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/*****************************************************************************
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* Local prototypes |
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*****************************************************************************/ |
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static int Create ( vlc_object_t * ); |
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|
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static void DoWork ( aout_instance_t *, aout_buffer_t * ); |
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/*****************************************************************************
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* Module descriptor |
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*****************************************************************************/ |
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vlc_module_begin(); |
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set_description( _("dummy spdif audio mixer module") ); |
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set_capability( "audio mixer", 1 ); |
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add_shortcut( "spdif" ); |
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set_callbacks( Create, NULL ); |
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vlc_module_end(); |
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|
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/*****************************************************************************
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* Create: allocate spdif mixer |
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*****************************************************************************/ |
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static int Create( vlc_object_t *p_this ) |
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{ |
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aout_instance_t * p_aout = (aout_instance_t *)p_this; |
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if ( p_aout->mixer.output.i_format != AOUT_FMT_SPDIF ) |
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{ |
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return -1; |
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} |
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p_aout->mixer.pf_do_work = DoWork; |
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/* This is a bit kludgy - do not ask for a new buffer, since the one
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* provided by the first input will be good enough. */ |
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p_aout->mixer.output_alloc.i_alloc = AOUT_ALLOC_NONE; |
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return 0; |
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} |
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|
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/*****************************************************************************
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* DoWork: mix a new output buffer - this does nothing, indeed |
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*****************************************************************************/ |
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static void DoWork( aout_instance_t * p_aout, aout_buffer_t * p_buffer ) |
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{ |
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} |
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|
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