1 /*****************************************************************************
2 * dtstofloat32.c: DTS Coherent Acoustics decoder plugin for VLC.
3 * This plugin makes use of libdca to do the actual decoding
4 * (http://developers.videolan.org/libdca.html).
5 *****************************************************************************
6 * Copyright (C) 2001, 2002libdca the VideoLAN team
9 * Author: Gildas Bazin <gbazin@videolan.org>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
24 *****************************************************************************/
26 /*****************************************************************************
28 *****************************************************************************/
36 #include <dca.h> /* libdca header file */
39 #include <vlc_block.h>
40 #include "vlc_filter.h"
42 /*****************************************************************************
44 *****************************************************************************/
45 static int Create ( vlc_object_t * );
46 static void Destroy ( vlc_object_t * );
47 static void DoWork ( aout_instance_t *, aout_filter_t *, aout_buffer_t *,
50 static int Open ( vlc_object_t *, filter_sys_t *,
51 audio_format_t, audio_format_t );
53 static int OpenFilter ( vlc_object_t * );
54 static void CloseFilter( vlc_object_t * );
55 static block_t *Convert( filter_t *, block_t * );
57 /* libdca channel order */
58 static const uint32_t pi_channels_in[] =
59 { AOUT_CHAN_CENTER, AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
60 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, AOUT_CHAN_LFE, 0 };
61 /* our internal channel order (WG-4 order) */
62 static const uint32_t pi_channels_out[] =
63 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
64 AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
66 /*****************************************************************************
68 *****************************************************************************/
71 dca_state_t * p_libdca; /* libdca internal structure */
72 bool b_dynrng; /* see below */
73 int i_flags; /* libdca flags, see dtsdec/doc/libdts.txt */
75 int i_nb_channels; /* number of float32 per sample */
77 int pi_chan_table[AOUT_CHAN_MAX]; /* channel reordering */
80 /*****************************************************************************
82 *****************************************************************************/
83 #define DYNRNG_TEXT N_("DTS dynamic range compression")
84 #define DYNRNG_LONGTEXT N_( \
85 "Dynamic range compression makes the loud sounds softer, and the soft " \
86 "sounds louder, so you can more easily listen to the stream in a noisy " \
87 "environment without disturbing anyone. If you disable the dynamic range "\
88 "compression the playback will be more adapted to a movie theater or a " \
92 set_category( CAT_INPUT );
93 set_subcategory( SUBCAT_INPUT_ACODEC );
94 set_shortname( "DCA" );
95 set_description( _("DTS Coherent Acoustics audio decoder") );
96 add_bool( "dts-dynrng", 1, NULL, DYNRNG_TEXT, DYNRNG_LONGTEXT, false );
97 set_capability( "audio filter", 100 );
98 set_callbacks( Create, Destroy );
101 set_description( _("DTS Coherent Acoustics audio decoder") );
102 set_capability( "audio filter2", 100 );
103 set_callbacks( OpenFilter, CloseFilter );
106 /*****************************************************************************
108 *****************************************************************************/
109 static int Create( vlc_object_t *p_this )
111 aout_filter_t *p_filter = (aout_filter_t *)p_this;
115 if ( p_filter->input.i_format != VLC_FOURCC('d','t','s',' ')
116 || p_filter->output.i_format != VLC_FOURCC('f','l','3','2') )
121 if ( p_filter->input.i_rate != p_filter->output.i_rate )
126 /* Allocate the memory needed to store the module's structure */
127 p_sys = malloc( sizeof(filter_sys_t) );
128 p_filter->p_sys = (struct aout_filter_sys_t *)p_sys;
131 msg_Err( p_filter, "out of memory" );
135 i_ret = Open( VLC_OBJECT(p_filter), p_sys,
136 p_filter->input, p_filter->output );
138 p_filter->pf_do_work = DoWork;
139 p_filter->b_in_place = 0;
144 /*****************************************************************************
146 *****************************************************************************/
147 static int Open( vlc_object_t *p_this, filter_sys_t *p_sys,
148 audio_format_t input, audio_format_t output )
150 p_sys->b_dynrng = config_GetInt( p_this, "dts-dynrng" );
151 p_sys->b_dontwarn = 0;
153 /* We'll do our own downmixing, thanks. */
154 p_sys->i_nb_channels = aout_FormatNbChannels( &output );
155 switch ( (output.i_physical_channels & AOUT_CHAN_PHYSMASK)
158 case AOUT_CHAN_CENTER:
159 if ( (output.i_original_channels & AOUT_CHAN_CENTER)
160 || (output.i_original_channels
161 & (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT)) )
163 p_sys->i_flags = DCA_MONO;
167 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT:
168 if ( output.i_original_channels & AOUT_CHAN_DOLBYSTEREO )
170 p_sys->i_flags = DCA_DOLBY;
172 else if ( input.i_original_channels == AOUT_CHAN_CENTER )
174 p_sys->i_flags = DCA_MONO;
176 else if ( input.i_original_channels & AOUT_CHAN_DUALMONO )
178 p_sys->i_flags = DCA_CHANNEL;
182 p_sys->i_flags = DCA_STEREO;
186 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER:
187 p_sys->i_flags = DCA_3F;
190 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARCENTER:
191 p_sys->i_flags = DCA_2F1R;
194 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
195 | AOUT_CHAN_REARCENTER:
196 p_sys->i_flags = DCA_3F1R;
199 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
200 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT:
201 p_sys->i_flags = DCA_2F2R;
204 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
205 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT:
206 p_sys->i_flags = DCA_3F2R;
210 msg_Warn( p_this, "unknown sample format!" );
214 if ( output.i_physical_channels & AOUT_CHAN_LFE )
216 p_sys->i_flags |= DCA_LFE;
218 //p_sys->i_flags |= DCA_ADJUST_LEVEL;
220 /* Initialize libdca */
221 p_sys->p_libdca = dca_init( 0 );
222 if( p_sys->p_libdca == NULL )
224 msg_Err( p_this, "unable to initialize libdca" );
228 aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
229 output.i_physical_channels & AOUT_CHAN_PHYSMASK,
230 p_sys->i_nb_channels,
231 p_sys->pi_chan_table );
236 /*****************************************************************************
237 * Interleave: helper function to interleave channels
238 *****************************************************************************/
239 static void Interleave( float * p_out, const float * p_in, int i_nb_channels,
242 /* We do not only have to interleave, but also reorder the channels. */
245 for ( j = 0; j < i_nb_channels; j++ )
247 for ( i = 0; i < 256; i++ )
249 p_out[i * i_nb_channels + pi_chan_table[j]] = p_in[j * 256 + i];
254 /*****************************************************************************
255 * Duplicate: helper function to duplicate a unique channel
256 *****************************************************************************/
257 static void Duplicate( float * p_out, const float * p_in )
261 for ( i = 256; i--; )
269 /*****************************************************************************
270 * Exchange: helper function to exchange left & right channels
271 *****************************************************************************/
272 static void Exchange( float * p_out, const float * p_in )
275 const float * p_first = p_in + 256;
276 const float * p_second = p_in;
278 for ( i = 0; i < 256; i++ )
280 *p_out++ = *p_first++;
281 *p_out++ = *p_second++;
285 /*****************************************************************************
286 * DoWork: decode a DTS frame.
287 *****************************************************************************/
288 static void DoWork( aout_instance_t * p_aout, aout_filter_t * p_filter,
289 aout_buffer_t * p_in_buf, aout_buffer_t * p_out_buf )
291 filter_sys_t *p_sys = (filter_sys_t *)p_filter->p_sys;
292 sample_t i_sample_level = 1;
293 int i_flags = p_sys->i_flags;
294 int i_bytes_per_block = 256 * p_sys->i_nb_channels
299 * Do the actual decoding now.
302 /* Needs to be called so the decoder knows which type of bitstream it is
304 int i_sample_rate, i_bit_rate, i_frame_length;
305 if( !dca_syncinfo( p_sys->p_libdca, p_in_buf->p_buffer, &i_flags,
306 &i_sample_rate, &i_bit_rate, &i_frame_length ) )
308 msg_Warn( p_aout, "libdca couldn't sync on frame" );
309 p_out_buf->i_nb_samples = p_out_buf->i_nb_bytes = 0;
313 i_flags = p_sys->i_flags;
314 dca_frame( p_sys->p_libdca, p_in_buf->p_buffer,
315 &i_flags, &i_sample_level, 0 );
317 if ( (i_flags & DCA_CHANNEL_MASK) != (p_sys->i_flags & DCA_CHANNEL_MASK)
318 && !p_sys->b_dontwarn )
321 "libdca couldn't do the requested downmix 0x%x->0x%x",
322 p_sys->i_flags & DCA_CHANNEL_MASK,
323 i_flags & DCA_CHANNEL_MASK );
325 p_sys->b_dontwarn = 1;
328 if( 0)//!p_sys->b_dynrng )
330 dca_dynrng( p_sys->p_libdca, NULL, NULL );
333 for ( i = 0; i < dca_blocks_num(p_sys->p_libdca); i++ )
335 sample_t * p_samples;
337 if( dca_block( p_sys->p_libdca ) )
339 msg_Warn( p_aout, "dca_block failed for block %d", i );
343 p_samples = dca_samples( p_sys->p_libdca );
345 if ( (p_sys->i_flags & DCA_CHANNEL_MASK) == DCA_MONO
346 && (p_filter->output.i_physical_channels
347 & (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT)) )
349 Duplicate( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
352 else if ( p_filter->output.i_original_channels
353 & AOUT_CHAN_REVERSESTEREO )
355 Exchange( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
360 /* Interleave the *$£%ù samples. */
361 Interleave( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
362 p_samples, p_sys->i_nb_channels, p_sys->pi_chan_table);
366 p_out_buf->i_nb_samples = p_in_buf->i_nb_samples;
367 p_out_buf->i_nb_bytes = i_bytes_per_block * i;
370 /*****************************************************************************
371 * Destroy : deallocate data structures
372 *****************************************************************************/
373 static void Destroy( vlc_object_t *p_this )
375 aout_filter_t *p_filter = (aout_filter_t *)p_this;
376 filter_sys_t *p_sys = (filter_sys_t *)p_filter->p_sys;
378 dca_free( p_sys->p_libdca );
382 /*****************************************************************************
384 *****************************************************************************/
385 static int OpenFilter( vlc_object_t *p_this )
387 filter_t *p_filter = (filter_t *)p_this;
391 if( p_filter->fmt_in.i_codec != VLC_FOURCC('d','t','s',' ') )
396 p_filter->fmt_out.audio.i_format =
397 p_filter->fmt_out.i_codec = VLC_FOURCC('f','l','3','2');
399 /* Allocate the memory needed to store the module's structure */
400 p_sys = p_filter->p_sys = malloc( sizeof(filter_sys_t) );
403 msg_Err( p_filter, "out of memory" );
407 /* Allocate the memory needed to store the module's structure */
408 p_filter->p_sys = p_sys = malloc( sizeof(filter_sys_t) );
411 msg_Err( p_filter, "out of memory" );
415 i_ret = Open( VLC_OBJECT(p_filter), p_sys,
416 p_filter->fmt_in.audio, p_filter->fmt_out.audio );
418 p_filter->pf_audio_filter = Convert;
419 p_filter->fmt_out.audio.i_rate = p_filter->fmt_in.audio.i_rate;
424 /*****************************************************************************
425 * CloseFilter : deallocate data structures
426 *****************************************************************************/
427 static void CloseFilter( vlc_object_t *p_this )
429 filter_t *p_filter = (filter_t *)p_this;
430 filter_sys_t *p_sys = p_filter->p_sys;
432 dca_free( p_sys->p_libdca );
436 static block_t *Convert( filter_t *p_filter, block_t *p_block )
438 aout_filter_t aout_filter;
439 aout_buffer_t in_buf, out_buf;
443 if( !p_block || !p_block->i_samples )
445 if( p_block ) p_block->pf_release( p_block );
449 i_out_size = p_block->i_samples *
450 p_filter->fmt_out.audio.i_bitspersample *
451 p_filter->fmt_out.audio.i_channels / 8;
453 p_out = p_filter->pf_audio_buffer_new( p_filter, i_out_size );
456 msg_Warn( p_filter, "can't get output buffer" );
457 p_block->pf_release( p_block );
461 p_out->i_samples = p_block->i_samples;
462 p_out->i_dts = p_block->i_dts;
463 p_out->i_pts = p_block->i_pts;
464 p_out->i_length = p_block->i_length;
466 aout_filter.p_sys = (struct aout_filter_sys_t *)p_filter->p_sys;
467 aout_filter.input = p_filter->fmt_in.audio;
468 aout_filter.input.i_format = p_filter->fmt_in.i_codec;
469 aout_filter.output = p_filter->fmt_out.audio;
470 aout_filter.output.i_format = p_filter->fmt_out.i_codec;
472 in_buf.p_buffer = p_block->p_buffer;
473 in_buf.i_nb_bytes = p_block->i_buffer;
474 in_buf.i_nb_samples = p_block->i_samples;
475 out_buf.p_buffer = p_out->p_buffer;
476 out_buf.i_nb_bytes = p_out->i_buffer;
477 out_buf.i_nb_samples = p_out->i_samples;
479 DoWork( (aout_instance_t *)p_filter, &aout_filter, &in_buf, &out_buf );
481 p_out->i_buffer = out_buf.i_nb_bytes;
482 p_out->i_samples = out_buf.i_nb_samples;
484 p_block->pf_release( p_block );