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 *****************************************************************************/
32 #include <dca.h> /* libdca header file */
35 #include <vlc_block.h>
36 #include "vlc_filter.h"
38 /*****************************************************************************
40 *****************************************************************************/
41 static int Create ( vlc_object_t * );
42 static void Destroy ( vlc_object_t * );
43 static void DoWork ( aout_instance_t *, aout_filter_t *, aout_buffer_t *,
46 static int Open ( vlc_object_t *, filter_sys_t *,
47 audio_format_t, audio_format_t );
49 static int OpenFilter ( vlc_object_t * );
50 static void CloseFilter( vlc_object_t * );
51 static block_t *Convert( filter_t *, block_t * );
53 /* libdca channel order */
54 static const uint32_t pi_channels_in[] =
55 { AOUT_CHAN_CENTER, AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
56 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, AOUT_CHAN_LFE, 0 };
57 /* our internal channel order (WG-4 order) */
58 static const uint32_t pi_channels_out[] =
59 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
60 AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
62 /*****************************************************************************
64 *****************************************************************************/
67 dca_state_t * p_libdca; /* libdca internal structure */
68 vlc_bool_t b_dynrng; /* see below */
69 int i_flags; /* libdca flags, see dtsdec/doc/libdts.txt */
70 vlc_bool_t b_dontwarn;
71 int i_nb_channels; /* number of float32 per sample */
73 int pi_chan_table[AOUT_CHAN_MAX]; /* channel reordering */
76 /*****************************************************************************
78 *****************************************************************************/
79 #define DYNRNG_TEXT N_("DTS dynamic range compression")
80 #define DYNRNG_LONGTEXT N_( \
81 "Dynamic range compression makes the loud sounds softer, and the soft " \
82 "sounds louder, so you can more easily listen to the stream in a noisy " \
83 "environment without disturbing anyone. If you disable the dynamic range "\
84 "compression the playback will be more adapted to a movie theater or a " \
88 set_category( CAT_INPUT );
89 set_subcategory( SUBCAT_INPUT_ACODEC );
90 set_shortname( "DCA" );
91 set_description( _("DTS Coherent Acoustics audio decoder") );
92 add_bool( "dts-dynrng", 1, NULL, DYNRNG_TEXT, DYNRNG_LONGTEXT, VLC_FALSE );
93 set_capability( "audio filter", 100 );
94 set_callbacks( Create, Destroy );
97 set_description( _("DTS Coherent Acoustics audio decoder") );
98 set_capability( "audio filter2", 100 );
99 set_callbacks( OpenFilter, CloseFilter );
102 /*****************************************************************************
104 *****************************************************************************/
105 static int Create( vlc_object_t *p_this )
107 aout_filter_t *p_filter = (aout_filter_t *)p_this;
111 if ( p_filter->input.i_format != VLC_FOURCC('d','t','s',' ')
112 || p_filter->output.i_format != VLC_FOURCC('f','l','3','2') )
117 if ( p_filter->input.i_rate != p_filter->output.i_rate )
122 /* Allocate the memory needed to store the module's structure */
123 p_sys = malloc( sizeof(filter_sys_t) );
124 p_filter->p_sys = (struct aout_filter_sys_t *)p_sys;
127 msg_Err( p_filter, "out of memory" );
131 i_ret = Open( VLC_OBJECT(p_filter), p_sys,
132 p_filter->input, p_filter->output );
134 p_filter->pf_do_work = DoWork;
135 p_filter->b_in_place = 0;
140 /*****************************************************************************
142 *****************************************************************************/
143 static int Open( vlc_object_t *p_this, filter_sys_t *p_sys,
144 audio_format_t input, audio_format_t output )
146 p_sys->b_dynrng = config_GetInt( p_this, "dts-dynrng" );
147 p_sys->b_dontwarn = 0;
149 /* We'll do our own downmixing, thanks. */
150 p_sys->i_nb_channels = aout_FormatNbChannels( &output );
151 switch ( (output.i_physical_channels & AOUT_CHAN_PHYSMASK)
154 case AOUT_CHAN_CENTER:
155 if ( (output.i_original_channels & AOUT_CHAN_CENTER)
156 || (output.i_original_channels
157 & (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT)) )
159 p_sys->i_flags = DCA_MONO;
163 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT:
164 if ( output.i_original_channels & AOUT_CHAN_DOLBYSTEREO )
166 p_sys->i_flags = DCA_DOLBY;
168 else if ( input.i_original_channels == AOUT_CHAN_CENTER )
170 p_sys->i_flags = DCA_MONO;
172 else if ( input.i_original_channels & AOUT_CHAN_DUALMONO )
174 p_sys->i_flags = DCA_CHANNEL;
178 p_sys->i_flags = DCA_STEREO;
182 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER:
183 p_sys->i_flags = DCA_3F;
186 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARCENTER:
187 p_sys->i_flags = DCA_2F1R;
190 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
191 | AOUT_CHAN_REARCENTER:
192 p_sys->i_flags = DCA_3F1R;
195 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
196 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT:
197 p_sys->i_flags = DCA_2F2R;
200 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
201 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT:
202 p_sys->i_flags = DCA_3F2R;
206 msg_Warn( p_this, "unknown sample format!" );
210 if ( output.i_physical_channels & AOUT_CHAN_LFE )
212 p_sys->i_flags |= DCA_LFE;
214 //p_sys->i_flags |= DCA_ADJUST_LEVEL;
216 /* Initialize libdca */
217 p_sys->p_libdca = dca_init( 0 );
218 if( p_sys->p_libdca == NULL )
220 msg_Err( p_this, "unable to initialize libdca" );
224 aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
225 output.i_physical_channels & AOUT_CHAN_PHYSMASK,
226 p_sys->i_nb_channels,
227 p_sys->pi_chan_table );
232 /*****************************************************************************
233 * Interleave: helper function to interleave channels
234 *****************************************************************************/
235 static void Interleave( float * p_out, const float * p_in, int i_nb_channels,
238 /* We do not only have to interleave, but also reorder the channels. */
241 for ( j = 0; j < i_nb_channels; j++ )
243 for ( i = 0; i < 256; i++ )
245 p_out[i * i_nb_channels + pi_chan_table[j]] = p_in[j * 256 + i];
250 /*****************************************************************************
251 * Duplicate: helper function to duplicate a unique channel
252 *****************************************************************************/
253 static void Duplicate( float * p_out, const float * p_in )
257 for ( i = 256; i--; )
265 /*****************************************************************************
266 * Exchange: helper function to exchange left & right channels
267 *****************************************************************************/
268 static void Exchange( float * p_out, const float * p_in )
271 const float * p_first = p_in + 256;
272 const float * p_second = p_in;
274 for ( i = 0; i < 256; i++ )
276 *p_out++ = *p_first++;
277 *p_out++ = *p_second++;
281 /*****************************************************************************
282 * DoWork: decode a DTS frame.
283 *****************************************************************************/
284 static void DoWork( aout_instance_t * p_aout, aout_filter_t * p_filter,
285 aout_buffer_t * p_in_buf, aout_buffer_t * p_out_buf )
287 filter_sys_t *p_sys = (filter_sys_t *)p_filter->p_sys;
288 sample_t i_sample_level = 1;
289 int i_flags = p_sys->i_flags;
290 int i_bytes_per_block = 256 * p_sys->i_nb_channels
295 * Do the actual decoding now.
298 /* Needs to be called so the decoder knows which type of bitstream it is
300 int i_sample_rate, i_bit_rate, i_frame_length;
301 if( !dca_syncinfo( p_sys->p_libdca, p_in_buf->p_buffer, &i_flags,
302 &i_sample_rate, &i_bit_rate, &i_frame_length ) )
304 msg_Warn( p_aout, "libdca couldn't sync on frame" );
305 p_out_buf->i_nb_samples = p_out_buf->i_nb_bytes = 0;
309 i_flags = p_sys->i_flags;
310 dca_frame( p_sys->p_libdca, p_in_buf->p_buffer,
311 &i_flags, &i_sample_level, 0 );
313 if ( (i_flags & DCA_CHANNEL_MASK) != (p_sys->i_flags & DCA_CHANNEL_MASK)
314 && !p_sys->b_dontwarn )
317 "libdca couldn't do the requested downmix 0x%x->0x%x",
318 p_sys->i_flags & DCA_CHANNEL_MASK,
319 i_flags & DCA_CHANNEL_MASK );
321 p_sys->b_dontwarn = 1;
324 if( 0)//!p_sys->b_dynrng )
326 dca_dynrng( p_sys->p_libdca, NULL, NULL );
329 for ( i = 0; i < dca_blocks_num(p_sys->p_libdca); i++ )
331 sample_t * p_samples;
333 if( dca_block( p_sys->p_libdca ) )
335 msg_Warn( p_aout, "dca_block failed for block %d", i );
339 p_samples = dca_samples( p_sys->p_libdca );
341 if ( (p_sys->i_flags & DCA_CHANNEL_MASK) == DCA_MONO
342 && (p_filter->output.i_physical_channels
343 & (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT)) )
345 Duplicate( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
348 else if ( p_filter->output.i_original_channels
349 & AOUT_CHAN_REVERSESTEREO )
351 Exchange( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
356 /* Interleave the *$£%ù samples. */
357 Interleave( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
358 p_samples, p_sys->i_nb_channels, p_sys->pi_chan_table);
362 p_out_buf->i_nb_samples = p_in_buf->i_nb_samples;
363 p_out_buf->i_nb_bytes = i_bytes_per_block * i;
366 /*****************************************************************************
367 * Destroy : deallocate data structures
368 *****************************************************************************/
369 static void Destroy( vlc_object_t *p_this )
371 aout_filter_t *p_filter = (aout_filter_t *)p_this;
372 filter_sys_t *p_sys = (filter_sys_t *)p_filter->p_sys;
374 dca_free( p_sys->p_libdca );
378 /*****************************************************************************
380 *****************************************************************************/
381 static int OpenFilter( vlc_object_t *p_this )
383 filter_t *p_filter = (filter_t *)p_this;
387 if( p_filter->fmt_in.i_codec != VLC_FOURCC('d','t','s',' ') )
392 p_filter->fmt_out.audio.i_format =
393 p_filter->fmt_out.i_codec = VLC_FOURCC('f','l','3','2');
395 /* Allocate the memory needed to store the module's structure */
396 p_sys = p_filter->p_sys = malloc( sizeof(filter_sys_t) );
399 msg_Err( p_filter, "out of memory" );
403 /* Allocate the memory needed to store the module's structure */
404 p_filter->p_sys = p_sys = malloc( sizeof(filter_sys_t) );
407 msg_Err( p_filter, "out of memory" );
411 i_ret = Open( VLC_OBJECT(p_filter), p_sys,
412 p_filter->fmt_in.audio, p_filter->fmt_out.audio );
414 p_filter->pf_audio_filter = Convert;
415 p_filter->fmt_out.audio.i_rate = p_filter->fmt_in.audio.i_rate;
420 /*****************************************************************************
421 * CloseFilter : deallocate data structures
422 *****************************************************************************/
423 static void CloseFilter( vlc_object_t *p_this )
425 filter_t *p_filter = (filter_t *)p_this;
426 filter_sys_t *p_sys = p_filter->p_sys;
428 dca_free( p_sys->p_libdca );
432 static block_t *Convert( filter_t *p_filter, block_t *p_block )
434 aout_filter_t aout_filter;
435 aout_buffer_t in_buf, out_buf;
439 if( !p_block || !p_block->i_samples )
441 if( p_block ) p_block->pf_release( p_block );
445 i_out_size = p_block->i_samples *
446 p_filter->fmt_out.audio.i_bitspersample *
447 p_filter->fmt_out.audio.i_channels / 8;
449 p_out = p_filter->pf_audio_buffer_new( p_filter, i_out_size );
452 msg_Warn( p_filter, "can't get output buffer" );
453 p_block->pf_release( p_block );
457 p_out->i_samples = p_block->i_samples;
458 p_out->i_dts = p_block->i_dts;
459 p_out->i_pts = p_block->i_pts;
460 p_out->i_length = p_block->i_length;
462 aout_filter.p_sys = (struct aout_filter_sys_t *)p_filter->p_sys;
463 aout_filter.input = p_filter->fmt_in.audio;
464 aout_filter.input.i_format = p_filter->fmt_in.i_codec;
465 aout_filter.output = p_filter->fmt_out.audio;
466 aout_filter.output.i_format = p_filter->fmt_out.i_codec;
468 in_buf.p_buffer = p_block->p_buffer;
469 in_buf.i_nb_bytes = p_block->i_buffer;
470 in_buf.i_nb_samples = p_block->i_samples;
471 out_buf.p_buffer = p_out->p_buffer;
472 out_buf.i_nb_bytes = p_out->i_buffer;
473 out_buf.i_nb_samples = p_out->i_samples;
475 DoWork( (aout_instance_t *)p_filter, &aout_filter, &in_buf, &out_buf );
477 p_out->i_buffer = out_buf.i_nb_bytes;
478 p_out->i_samples = out_buf.i_nb_samples;
480 p_block->pf_release( p_block );