mirror of https://code.videolan.org/videolan/vlc
325 lines
10 KiB
C
325 lines
10 KiB
C
/*****************************************************************************
|
|
* dca.c: DTS Coherent Acoustics decoder plugin for VLC.
|
|
* This plugin makes use of libdca to do the actual decoding
|
|
* (http://developers.videolan.org/libdca.html).
|
|
*****************************************************************************
|
|
* Copyright (C) 2001, 2016 libdca VLC authors and VideoLAN
|
|
*
|
|
* Author: Gildas Bazin <gbazin@videolan.org>
|
|
* Thomas Guillem <thomas@gllm.fr>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser 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.
|
|
*****************************************************************************/
|
|
|
|
/*****************************************************************************
|
|
* NOTA BENE: this module requires the linking against a library which is
|
|
* known to require licensing under the GNU General Public License version 2
|
|
* (or later). Therefore, the result of compiling this module will normally
|
|
* be subject to the terms of that later license.
|
|
*****************************************************************************/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <vlc_common.h>
|
|
#include <vlc_plugin.h>
|
|
|
|
#include <dca.h> /* libdca header file */
|
|
|
|
#include <vlc_aout.h>
|
|
#include <vlc_block.h>
|
|
#include <vlc_codec.h>
|
|
|
|
static int Open ( vlc_object_t * );
|
|
static void Close( vlc_object_t * );
|
|
|
|
typedef struct
|
|
{
|
|
dca_state_t *p_libdca; /* libdca internal structure */
|
|
bool b_dynrng; /* see below */
|
|
int i_flags; /* libdca flags, see dtsdec/doc/libdts.txt */
|
|
bool b_dontwarn;
|
|
int i_nb_channels; /* number of float32 per sample */
|
|
|
|
uint8_t pi_chan_table[AOUT_CHAN_MAX]; /* channel reordering */
|
|
bool b_synced;
|
|
} decoder_sys_t;
|
|
|
|
#define DYNRNG_TEXT N_("DTS dynamic range compression")
|
|
#define DYNRNG_LONGTEXT N_( \
|
|
"Dynamic range compression makes the loud sounds softer, and the soft " \
|
|
"sounds louder, so you can more easily listen to the stream in a noisy " \
|
|
"environment without disturbing anyone. If you disable the dynamic range "\
|
|
"compression the playback will be more adapted to a movie theater or a " \
|
|
"listening room.")
|
|
|
|
vlc_module_begin ()
|
|
set_subcategory( SUBCAT_INPUT_ACODEC )
|
|
set_shortname( "DCA" )
|
|
set_description( N_("DTS Coherent Acoustics audio decoder") )
|
|
add_bool( "dts-dynrng", true, DYNRNG_TEXT, DYNRNG_LONGTEXT )
|
|
set_capability( "audio decoder", 60 )
|
|
set_callbacks( Open, Close )
|
|
vlc_module_end ()
|
|
|
|
/*
|
|
* helper function to interleave channels
|
|
*/
|
|
static void Interleave( float * p_out, const float * p_in, int i_nb_channels,
|
|
uint8_t *pi_chan_table )
|
|
{
|
|
/* We do not only have to interleave, but also reorder the channels. */
|
|
|
|
int i, j;
|
|
for ( j = 0; j < i_nb_channels; j++ )
|
|
{
|
|
for ( i = 0; i < 256; i++ )
|
|
{
|
|
p_out[i * i_nb_channels + pi_chan_table[j]] = p_in[j * 256 + i];
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* helper function to duplicate a unique channel
|
|
*/
|
|
static void Duplicate( float * p_out, const float * p_in )
|
|
{
|
|
for ( int i = 256; i--; )
|
|
{
|
|
*p_out++ = *p_in;
|
|
*p_out++ = *p_in;
|
|
p_in++;
|
|
}
|
|
}
|
|
|
|
static int Decode( decoder_t *p_dec, block_t *p_in_buf )
|
|
{
|
|
decoder_sys_t *p_sys = p_dec->p_sys;
|
|
|
|
if (p_in_buf == NULL) /* No Drain */
|
|
return VLCDEC_SUCCESS;
|
|
|
|
sample_t i_sample_level = 1;
|
|
int i_flags = p_sys->i_flags;
|
|
size_t i_bytes_per_block = 256 * p_sys->i_nb_channels * sizeof(float);
|
|
|
|
block_t *p_out_buf = block_Alloc( 6 * i_bytes_per_block );
|
|
if( unlikely(p_out_buf == NULL) )
|
|
goto out;
|
|
|
|
/*
|
|
* Do the actual decoding now.
|
|
*/
|
|
|
|
/* Needs to be called so the decoder knows which type of bitstream it is
|
|
* dealing with. */
|
|
int i_sample_rate, i_bit_rate, i_frame_length;
|
|
if( !dca_syncinfo( p_sys->p_libdca, p_in_buf->p_buffer, &i_flags,
|
|
&i_sample_rate, &i_bit_rate, &i_frame_length ) )
|
|
{
|
|
msg_Warn( p_dec, "libdca couldn't sync on frame" );
|
|
p_out_buf->i_nb_samples = p_out_buf->i_buffer = 0;
|
|
goto out;
|
|
}
|
|
|
|
i_flags = p_sys->i_flags;
|
|
dca_frame( p_sys->p_libdca, p_in_buf->p_buffer,
|
|
&i_flags, &i_sample_level, 0 );
|
|
|
|
if ( (i_flags & DCA_CHANNEL_MASK) != (p_sys->i_flags & DCA_CHANNEL_MASK)
|
|
&& !p_sys->b_dontwarn )
|
|
{
|
|
msg_Warn( p_dec,
|
|
"libdca couldn't do the requested downmix 0x%x->0x%x",
|
|
p_sys->i_flags & DCA_CHANNEL_MASK,
|
|
i_flags & DCA_CHANNEL_MASK );
|
|
|
|
p_sys->b_dontwarn = 1;
|
|
}
|
|
|
|
for( int i = 0; i < dca_blocks_num(p_sys->p_libdca); i++ )
|
|
{
|
|
sample_t * p_samples;
|
|
|
|
if( dca_block( p_sys->p_libdca ) )
|
|
{
|
|
msg_Warn( p_dec, "dca_block failed for block %d", i );
|
|
break;
|
|
}
|
|
|
|
p_samples = dca_samples( p_sys->p_libdca );
|
|
|
|
if ( (p_sys->i_flags & DCA_CHANNEL_MASK) == DCA_MONO
|
|
&& (p_dec->fmt_out.audio.i_physical_channels
|
|
& (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT)) )
|
|
{
|
|
Duplicate( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
|
|
p_samples );
|
|
}
|
|
else
|
|
{
|
|
/* Interleave the *$£%ù samples. */
|
|
Interleave( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
|
|
p_samples, p_sys->i_nb_channels, p_sys->pi_chan_table);
|
|
}
|
|
}
|
|
|
|
p_out_buf->i_nb_samples = dca_blocks_num(p_sys->p_libdca) * 256;
|
|
p_out_buf->i_buffer = p_in_buf->i_nb_samples * sizeof(float) * p_sys->i_nb_channels;
|
|
p_out_buf->i_dts = p_in_buf->i_dts;
|
|
p_out_buf->i_pts = p_in_buf->i_pts;
|
|
p_out_buf->i_length = p_in_buf->i_length;
|
|
out:
|
|
if (p_out_buf != NULL)
|
|
decoder_QueueAudio(p_dec, p_out_buf);
|
|
block_Release( p_in_buf );
|
|
return VLCDEC_SUCCESS;
|
|
}
|
|
|
|
static int channels_vlc2dca( const audio_format_t *p_audio, int *p_flags )
|
|
{
|
|
int i_flags = 0;
|
|
|
|
switch ( p_audio->i_physical_channels & ~AOUT_CHAN_LFE )
|
|
{
|
|
case AOUT_CHAN_CENTER:
|
|
if ( (p_audio->i_physical_channels & AOUT_CHAN_CENTER)
|
|
|| (p_audio->i_physical_channels
|
|
& (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT)) )
|
|
i_flags = DCA_MONO;
|
|
break;
|
|
|
|
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT:
|
|
if ( p_audio->i_chan_mode & AOUT_CHANMODE_DOLBYSTEREO )
|
|
i_flags = DCA_DOLBY;
|
|
else if ( p_audio->i_chan_mode & AOUT_CHANMODE_DUALMONO )
|
|
i_flags = DCA_CHANNEL;
|
|
else
|
|
i_flags = DCA_STEREO;
|
|
break;
|
|
|
|
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER:
|
|
i_flags = DCA_3F;
|
|
break;
|
|
|
|
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARCENTER:
|
|
i_flags = DCA_2F1R;
|
|
break;
|
|
|
|
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
|
|
| AOUT_CHAN_REARCENTER:
|
|
i_flags = DCA_3F1R;
|
|
break;
|
|
|
|
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
|
|
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT:
|
|
i_flags = DCA_2F2R;
|
|
break;
|
|
|
|
case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
|
|
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT:
|
|
i_flags = DCA_3F2R;
|
|
break;
|
|
|
|
default:
|
|
return VLC_EGENERIC;
|
|
}
|
|
|
|
if ( p_audio->i_physical_channels & AOUT_CHAN_LFE )
|
|
i_flags |= DCA_LFE;
|
|
*p_flags = i_flags;
|
|
return VLC_SUCCESS;
|
|
}
|
|
|
|
static int Open( vlc_object_t *p_this )
|
|
{
|
|
decoder_t *p_dec = (decoder_t *)p_this;
|
|
decoder_sys_t *p_sys;
|
|
|
|
if( p_dec->fmt_in->i_codec != VLC_CODEC_DTS
|
|
|| p_dec->fmt_in->audio.i_rate == 0
|
|
|| p_dec->fmt_in->audio.i_physical_channels == 0
|
|
|| p_dec->fmt_in->audio.i_bytes_per_frame == 0
|
|
|| p_dec->fmt_in->audio.i_frame_length == 0 )
|
|
return VLC_EGENERIC;
|
|
|
|
/* Allocate the memory needed to store the module's structure */
|
|
p_sys = p_dec->p_sys = malloc( sizeof(decoder_sys_t) );
|
|
if( p_sys == NULL )
|
|
return VLC_ENOMEM;
|
|
|
|
p_sys->b_dynrng = var_InheritBool( p_this, "dts-dynrng" );
|
|
p_sys->b_dontwarn = 0;
|
|
|
|
/* We'll do our own downmixing, thanks. */
|
|
p_sys->i_nb_channels = aout_FormatNbChannels( &p_dec->fmt_in->audio );
|
|
if( channels_vlc2dca( &p_dec->fmt_in->audio, &p_sys->i_flags )
|
|
!= VLC_SUCCESS )
|
|
{
|
|
msg_Warn( p_this, "unknown sample format!" );
|
|
free( p_sys );
|
|
return VLC_EGENERIC;
|
|
}
|
|
//p_sys->i_flags |= DCA_ADJUST_LEVEL;
|
|
|
|
/* Initialize libdca */
|
|
p_sys->p_libdca = dca_init( 0 );
|
|
if( p_sys->p_libdca == NULL )
|
|
{
|
|
msg_Err( p_this, "unable to initialize libdca" );
|
|
free( p_sys );
|
|
return VLC_EGENERIC;
|
|
}
|
|
|
|
/* libdca channel order
|
|
* libdca currently only decodes 5.1, even if you have a DTS-ES source. */
|
|
static const uint32_t pi_channels_in[] = {
|
|
AOUT_CHAN_CENTER, AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
|
|
AOUT_CHAN_REARCENTER, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
|
|
AOUT_CHAN_LFE, 0
|
|
};
|
|
|
|
aout_CheckChannelReorder( pi_channels_in, NULL,
|
|
p_dec->fmt_in->audio.i_physical_channels,
|
|
p_sys->pi_chan_table );
|
|
|
|
p_dec->fmt_out.audio = p_dec->fmt_in->audio;
|
|
p_dec->fmt_out.audio.i_format = VLC_CODEC_FL32;
|
|
p_dec->fmt_out.i_codec = p_dec->fmt_out.audio.i_format;
|
|
|
|
aout_FormatPrepare( &p_dec->fmt_out.audio );
|
|
|
|
if( decoder_UpdateAudioFormat( p_dec ) )
|
|
{
|
|
Close( p_this );
|
|
return VLC_EGENERIC;
|
|
}
|
|
|
|
p_dec->pf_decode = Decode;
|
|
p_dec->pf_flush = NULL;
|
|
return VLC_SUCCESS;
|
|
}
|
|
|
|
static void Close( vlc_object_t *p_this )
|
|
{
|
|
decoder_t *p_dec = (decoder_t *)p_this;
|
|
decoder_sys_t *p_sys = p_dec->p_sys;
|
|
|
|
dca_free( p_sys->p_libdca );
|
|
free( p_sys );
|
|
}
|