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 *****************************************************************************/
34 #include <vlc_plugin.h>
37 #include <dca.h> /* libdca header file */
40 #include <vlc_block.h>
41 #include "vlc_filter.h"
43 /*****************************************************************************
45 *****************************************************************************/
46 static int Create ( vlc_object_t * );
47 static void Destroy ( vlc_object_t * );
48 static void DoWork ( aout_instance_t *, aout_filter_t *, aout_buffer_t *,
51 static int Open ( vlc_object_t *, filter_sys_t *,
52 audio_format_t, audio_format_t );
54 static int OpenFilter ( vlc_object_t * );
55 static void CloseFilter( vlc_object_t * );
56 static block_t *Convert( filter_t *, block_t * );
58 /* libdca channel order */
59 static const uint32_t pi_channels_in[] =
60 { AOUT_CHAN_CENTER, AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
61 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, AOUT_CHAN_LFE, 0 };
62 /* our internal channel order (WG-4 order) */
63 static const uint32_t pi_channels_out[] =
64 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
65 AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
67 /*****************************************************************************
69 *****************************************************************************/
72 dca_state_t * p_libdca; /* libdca internal structure */
73 bool b_dynrng; /* see below */
74 int i_flags; /* libdca flags, see dtsdec/doc/libdts.txt */
76 int i_nb_channels; /* number of float32 per sample */
78 int pi_chan_table[AOUT_CHAN_MAX]; /* channel reordering */
81 /*****************************************************************************
83 *****************************************************************************/
84 #define DYNRNG_TEXT N_("DTS dynamic range compression")
85 #define DYNRNG_LONGTEXT N_( \
86 "Dynamic range compression makes the loud sounds softer, and the soft " \
87 "sounds louder, so you can more easily listen to the stream in a noisy " \
88 "environment without disturbing anyone. If you disable the dynamic range "\
89 "compression the playback will be more adapted to a movie theater or a " \
93 set_category( CAT_INPUT );
94 set_subcategory( SUBCAT_INPUT_ACODEC );
95 set_shortname( "DCA" );
96 set_description( N_("DTS Coherent Acoustics audio decoder") );
97 add_bool( "dts-dynrng", 1, NULL, DYNRNG_TEXT, DYNRNG_LONGTEXT, false );
98 set_capability( "audio filter", 100 );
99 set_callbacks( Create, Destroy );
102 set_description( N_("DTS Coherent Acoustics audio decoder") );
103 set_capability( "audio filter2", 100 );
104 set_callbacks( OpenFilter, CloseFilter );
107 /*****************************************************************************
109 *****************************************************************************/
110 static int Create( vlc_object_t *p_this )
112 aout_filter_t *p_filter = (aout_filter_t *)p_this;
116 if ( p_filter->input.i_format != VLC_FOURCC('d','t','s',' ')
117 || p_filter->output.i_format != VLC_FOURCC('f','l','3','2') )
122 if ( p_filter->input.i_rate != p_filter->output.i_rate )
127 /* Allocate the memory needed to store the module's structure */
128 p_sys = malloc( sizeof(filter_sys_t) );
129 p_filter->p_sys = (struct aout_filter_sys_t *)p_sys;
132 msg_Err( p_filter, "out of memory" );
136 i_ret = Open( VLC_OBJECT(p_filter), p_sys,
137 p_filter->input, p_filter->output );
139 p_filter->pf_do_work = DoWork;
140 p_filter->b_in_place = 0;
145 /*****************************************************************************
147 *****************************************************************************/
148 static int Open( vlc_object_t *p_this, filter_sys_t *p_sys,
149 audio_format_t input, audio_format_t output )
151 p_sys->b_dynrng = config_GetInt( p_this, "dts-dynrng" );
152 p_sys->b_dontwarn = 0;
154 /* We'll do our own downmixing, thanks. */
155 p_sys->i_nb_channels = aout_FormatNbChannels( &output );
156 switch ( (output.i_physical_channels & AOUT_CHAN_PHYSMASK)
159 case AOUT_CHAN_CENTER:
160 if ( (output.i_original_channels & AOUT_CHAN_CENTER)
161 || (output.i_original_channels
162 & (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT)) )
164 p_sys->i_flags = DCA_MONO;
168 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT:
169 if ( output.i_original_channels & AOUT_CHAN_DOLBYSTEREO )
171 p_sys->i_flags = DCA_DOLBY;
173 else if ( input.i_original_channels == AOUT_CHAN_CENTER )
175 p_sys->i_flags = DCA_MONO;
177 else if ( input.i_original_channels & AOUT_CHAN_DUALMONO )
179 p_sys->i_flags = DCA_CHANNEL;
183 p_sys->i_flags = DCA_STEREO;
187 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER:
188 p_sys->i_flags = DCA_3F;
191 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARCENTER:
192 p_sys->i_flags = DCA_2F1R;
195 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
196 | AOUT_CHAN_REARCENTER:
197 p_sys->i_flags = DCA_3F1R;
200 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
201 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT:
202 p_sys->i_flags = DCA_2F2R;
205 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
206 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT:
207 p_sys->i_flags = DCA_3F2R;
211 msg_Warn( p_this, "unknown sample format!" );
215 if ( output.i_physical_channels & AOUT_CHAN_LFE )
217 p_sys->i_flags |= DCA_LFE;
219 //p_sys->i_flags |= DCA_ADJUST_LEVEL;
221 /* Initialize libdca */
222 p_sys->p_libdca = dca_init( 0 );
223 if( p_sys->p_libdca == NULL )
225 msg_Err( p_this, "unable to initialize libdca" );
229 aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
230 output.i_physical_channels & AOUT_CHAN_PHYSMASK,
231 p_sys->i_nb_channels,
232 p_sys->pi_chan_table );
237 /*****************************************************************************
238 * Interleave: helper function to interleave channels
239 *****************************************************************************/
240 static void Interleave( float * p_out, const float * p_in, int i_nb_channels,
243 /* We do not only have to interleave, but also reorder the channels. */
246 for ( j = 0; j < i_nb_channels; j++ )
248 for ( i = 0; i < 256; i++ )
250 p_out[i * i_nb_channels + pi_chan_table[j]] = p_in[j * 256 + i];
255 /*****************************************************************************
256 * Duplicate: helper function to duplicate a unique channel
257 *****************************************************************************/
258 static void Duplicate( float * p_out, const float * p_in )
262 for ( i = 256; i--; )
270 /*****************************************************************************
271 * Exchange: helper function to exchange left & right channels
272 *****************************************************************************/
273 static void Exchange( float * p_out, const float * p_in )
276 const float * p_first = p_in + 256;
277 const float * p_second = p_in;
279 for ( i = 0; i < 256; i++ )
281 *p_out++ = *p_first++;
282 *p_out++ = *p_second++;
286 /*****************************************************************************
287 * DoWork: decode a DTS frame.
288 *****************************************************************************/
289 static void DoWork( aout_instance_t * p_aout, aout_filter_t * p_filter,
290 aout_buffer_t * p_in_buf, aout_buffer_t * p_out_buf )
292 filter_sys_t *p_sys = (filter_sys_t *)p_filter->p_sys;
293 sample_t i_sample_level = 1;
294 int i_flags = p_sys->i_flags;
295 int i_bytes_per_block = 256 * p_sys->i_nb_channels
300 * Do the actual decoding now.
303 /* Needs to be called so the decoder knows which type of bitstream it is
305 int i_sample_rate, i_bit_rate, i_frame_length;
306 if( !dca_syncinfo( p_sys->p_libdca, p_in_buf->p_buffer, &i_flags,
307 &i_sample_rate, &i_bit_rate, &i_frame_length ) )
309 msg_Warn( p_aout, "libdca couldn't sync on frame" );
310 p_out_buf->i_nb_samples = p_out_buf->i_nb_bytes = 0;
314 i_flags = p_sys->i_flags;
315 dca_frame( p_sys->p_libdca, p_in_buf->p_buffer,
316 &i_flags, &i_sample_level, 0 );
318 if ( (i_flags & DCA_CHANNEL_MASK) != (p_sys->i_flags & DCA_CHANNEL_MASK)
319 && !p_sys->b_dontwarn )
322 "libdca couldn't do the requested downmix 0x%x->0x%x",
323 p_sys->i_flags & DCA_CHANNEL_MASK,
324 i_flags & DCA_CHANNEL_MASK );
326 p_sys->b_dontwarn = 1;
329 if( 0)//!p_sys->b_dynrng )
331 dca_dynrng( p_sys->p_libdca, NULL, NULL );
334 for ( i = 0; i < dca_blocks_num(p_sys->p_libdca); i++ )
336 sample_t * p_samples;
338 if( dca_block( p_sys->p_libdca ) )
340 msg_Warn( p_aout, "dca_block failed for block %d", i );
344 p_samples = dca_samples( p_sys->p_libdca );
346 if ( (p_sys->i_flags & DCA_CHANNEL_MASK) == DCA_MONO
347 && (p_filter->output.i_physical_channels
348 & (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT)) )
350 Duplicate( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
353 else if ( p_filter->output.i_original_channels
354 & AOUT_CHAN_REVERSESTEREO )
356 Exchange( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
361 /* Interleave the *$£%ù samples. */
362 Interleave( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
363 p_samples, p_sys->i_nb_channels, p_sys->pi_chan_table);
367 p_out_buf->i_nb_samples = p_in_buf->i_nb_samples;
368 p_out_buf->i_nb_bytes = i_bytes_per_block * i;
371 /*****************************************************************************
372 * Destroy : deallocate data structures
373 *****************************************************************************/
374 static void Destroy( vlc_object_t *p_this )
376 aout_filter_t *p_filter = (aout_filter_t *)p_this;
377 filter_sys_t *p_sys = (filter_sys_t *)p_filter->p_sys;
379 dca_free( p_sys->p_libdca );
383 /*****************************************************************************
385 *****************************************************************************/
386 static int OpenFilter( vlc_object_t *p_this )
388 filter_t *p_filter = (filter_t *)p_this;
392 if( p_filter->fmt_in.i_codec != VLC_FOURCC('d','t','s',' ') )
397 p_filter->fmt_out.audio.i_format =
398 p_filter->fmt_out.i_codec = VLC_FOURCC('f','l','3','2');
400 /* Allocate the memory needed to store the module's structure */
401 p_sys = p_filter->p_sys = malloc( sizeof(filter_sys_t) );
404 msg_Err( p_filter, "out of memory" );
408 /* Allocate the memory needed to store the module's structure */
409 p_filter->p_sys = p_sys = malloc( sizeof(filter_sys_t) );
412 msg_Err( p_filter, "out of memory" );
416 i_ret = Open( VLC_OBJECT(p_filter), p_sys,
417 p_filter->fmt_in.audio, p_filter->fmt_out.audio );
419 p_filter->pf_audio_filter = Convert;
420 p_filter->fmt_out.audio.i_rate = p_filter->fmt_in.audio.i_rate;
425 /*****************************************************************************
426 * CloseFilter : deallocate data structures
427 *****************************************************************************/
428 static void CloseFilter( vlc_object_t *p_this )
430 filter_t *p_filter = (filter_t *)p_this;
431 filter_sys_t *p_sys = p_filter->p_sys;
433 dca_free( p_sys->p_libdca );
437 static block_t *Convert( filter_t *p_filter, block_t *p_block )
439 aout_filter_t aout_filter;
440 aout_buffer_t in_buf, out_buf;
444 if( !p_block || !p_block->i_samples )
446 if( p_block ) p_block->pf_release( p_block );
450 i_out_size = p_block->i_samples *
451 p_filter->fmt_out.audio.i_bitspersample *
452 p_filter->fmt_out.audio.i_channels / 8;
454 p_out = p_filter->pf_audio_buffer_new( p_filter, i_out_size );
457 msg_Warn( p_filter, "can't get output buffer" );
458 p_block->pf_release( p_block );
462 p_out->i_samples = p_block->i_samples;
463 p_out->i_dts = p_block->i_dts;
464 p_out->i_pts = p_block->i_pts;
465 p_out->i_length = p_block->i_length;
467 aout_filter.p_sys = (struct aout_filter_sys_t *)p_filter->p_sys;
468 aout_filter.input = p_filter->fmt_in.audio;
469 aout_filter.input.i_format = p_filter->fmt_in.i_codec;
470 aout_filter.output = p_filter->fmt_out.audio;
471 aout_filter.output.i_format = p_filter->fmt_out.i_codec;
473 in_buf.p_buffer = p_block->p_buffer;
474 in_buf.i_nb_bytes = p_block->i_buffer;
475 in_buf.i_nb_samples = p_block->i_samples;
476 out_buf.p_buffer = p_out->p_buffer;
477 out_buf.i_nb_bytes = p_out->i_buffer;
478 out_buf.i_nb_samples = p_out->i_samples;
480 DoWork( (aout_instance_t *)p_filter, &aout_filter, &in_buf, &out_buf );
482 p_out->i_buffer = out_buf.i_nb_bytes;
483 p_out->i_samples = out_buf.i_nb_samples;
485 p_block->pf_release( p_block );