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 *****************************************************************************/
31 #include <stdlib.h> /* malloc(), free() */
32 #include <string.h> /* strdup() */
34 #include <dts.h> /* libdca header file */
36 #include <vlc/decoder.h>
37 #include "aout_internal.h"
38 #include "vlc_filter.h"
40 /*****************************************************************************
42 *****************************************************************************/
43 static int Create ( vlc_object_t * );
44 static void Destroy ( vlc_object_t * );
45 static void DoWork ( aout_instance_t *, aout_filter_t *, aout_buffer_t *,
48 static int Open ( vlc_object_t *, filter_sys_t *,
49 audio_format_t, audio_format_t );
51 static int OpenFilter ( vlc_object_t * );
52 static void CloseFilter( vlc_object_t * );
53 static block_t *Convert( filter_t *, block_t * );
55 /* libdca channel order */
56 static const uint32_t pi_channels_in[] =
57 { AOUT_CHAN_CENTER, AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
58 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, AOUT_CHAN_LFE, 0 };
59 /* our internal channel order (WG-4 order) */
60 static const uint32_t pi_channels_out[] =
61 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
62 AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
64 /*****************************************************************************
66 *****************************************************************************/
69 dts_state_t * p_libdts; /* libdca internal structure */
70 vlc_bool_t b_dynrng; /* see below */
71 int i_flags; /* libdca flags, see dtsdec/doc/libdts.txt */
72 vlc_bool_t b_dontwarn;
73 int i_nb_channels; /* number of float32 per sample */
75 int pi_chan_table[AOUT_CHAN_MAX]; /* channel reordering */
78 /*****************************************************************************
80 *****************************************************************************/
81 #define DYNRNG_TEXT N_("DTS dynamic range compression")
82 #define DYNRNG_LONGTEXT N_( \
83 "Dynamic range compression makes the loud sounds softer, and the soft " \
84 "sounds louder, so you can more easily listen to the stream in a noisy " \
85 "environment without disturbing anyone. If you disable the dynamic range "\
86 "compression the playback will be more adapted to a movie theater or a " \
90 set_category( CAT_INPUT );
91 set_subcategory( SUBCAT_INPUT_ACODEC );
92 set_shortname( "DCA" );
93 set_description( _("DTS Coherent Acoustics audio decoder") );
94 add_bool( "dts-dynrng", 1, NULL, DYNRNG_TEXT, DYNRNG_LONGTEXT, VLC_FALSE );
95 set_capability( "audio filter", 100 );
96 set_callbacks( Create, Destroy );
99 set_description( _("DTS Coherent Acoustics audio decoder") );
100 set_capability( "audio filter2", 100 );
101 set_callbacks( OpenFilter, CloseFilter );
104 /*****************************************************************************
106 *****************************************************************************/
107 static int Create( vlc_object_t *p_this )
109 aout_filter_t *p_filter = (aout_filter_t *)p_this;
113 if ( p_filter->input.i_format != VLC_FOURCC('d','t','s',' ')
114 || p_filter->output.i_format != VLC_FOURCC('f','l','3','2') )
119 if ( p_filter->input.i_rate != p_filter->output.i_rate )
124 /* Allocate the memory needed to store the module's structure */
125 p_sys = malloc( sizeof(filter_sys_t) );
126 p_filter->p_sys = (struct aout_filter_sys_t *)p_sys;
129 msg_Err( p_filter, "out of memory" );
133 i_ret = Open( VLC_OBJECT(p_filter), p_sys,
134 p_filter->input, p_filter->output );
136 p_filter->pf_do_work = DoWork;
137 p_filter->b_in_place = 0;
142 /*****************************************************************************
144 *****************************************************************************/
145 static int Open( vlc_object_t *p_this, filter_sys_t *p_sys,
146 audio_format_t input, audio_format_t output )
148 p_sys->b_dynrng = config_GetInt( p_this, "dts-dynrng" );
149 p_sys->b_dontwarn = 0;
151 /* We'll do our own downmixing, thanks. */
152 p_sys->i_nb_channels = aout_FormatNbChannels( &output );
153 switch ( (output.i_physical_channels & AOUT_CHAN_PHYSMASK)
156 case AOUT_CHAN_CENTER:
157 if ( (output.i_original_channels & AOUT_CHAN_CENTER)
158 || (output.i_original_channels
159 & (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT)) )
161 p_sys->i_flags = DTS_MONO;
165 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT:
166 if ( output.i_original_channels & AOUT_CHAN_DOLBYSTEREO )
168 p_sys->i_flags = DTS_DOLBY;
170 else if ( input.i_original_channels == AOUT_CHAN_CENTER )
172 p_sys->i_flags = DTS_MONO;
174 else if ( input.i_original_channels & AOUT_CHAN_DUALMONO )
176 p_sys->i_flags = DTS_CHANNEL;
180 p_sys->i_flags = DTS_STEREO;
184 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER:
185 p_sys->i_flags = DTS_3F;
188 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARCENTER:
189 p_sys->i_flags = DTS_2F1R;
192 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
193 | AOUT_CHAN_REARCENTER:
194 p_sys->i_flags = DTS_3F1R;
197 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
198 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT:
199 p_sys->i_flags = DTS_2F2R;
202 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
203 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT:
204 p_sys->i_flags = DTS_3F2R;
208 msg_Warn( p_this, "unknown sample format!" );
212 if ( output.i_physical_channels & AOUT_CHAN_LFE )
214 p_sys->i_flags |= DTS_LFE;
216 //p_sys->i_flags |= DTS_ADJUST_LEVEL;
218 /* Initialize libdca */
219 p_sys->p_libdts = dts_init( 0 );
220 if( p_sys->p_libdts == NULL )
222 msg_Err( p_this, "unable to initialize libdca" );
226 aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
227 output.i_physical_channels & AOUT_CHAN_PHYSMASK,
228 p_sys->i_nb_channels,
229 p_sys->pi_chan_table );
234 /*****************************************************************************
235 * Interleave: helper function to interleave channels
236 *****************************************************************************/
237 static void Interleave( float * p_out, const float * p_in, int i_nb_channels,
240 /* We do not only have to interleave, but also reorder the channels. */
243 for ( j = 0; j < i_nb_channels; j++ )
245 for ( i = 0; i < 256; i++ )
247 p_out[i * i_nb_channels + pi_chan_table[j]] = p_in[j * 256 + i];
252 /*****************************************************************************
253 * Duplicate: helper function to duplicate a unique channel
254 *****************************************************************************/
255 static void Duplicate( float * p_out, const float * p_in )
259 for ( i = 256; i--; )
267 /*****************************************************************************
268 * Exchange: helper function to exchange left & right channels
269 *****************************************************************************/
270 static void Exchange( float * p_out, const float * p_in )
273 const float * p_first = p_in + 256;
274 const float * p_second = p_in;
276 for ( i = 0; i < 256; i++ )
278 *p_out++ = *p_first++;
279 *p_out++ = *p_second++;
283 /*****************************************************************************
284 * DoWork: decode a DTS frame.
285 *****************************************************************************/
286 static void DoWork( aout_instance_t * p_aout, aout_filter_t * p_filter,
287 aout_buffer_t * p_in_buf, aout_buffer_t * p_out_buf )
289 filter_sys_t *p_sys = (filter_sys_t *)p_filter->p_sys;
290 sample_t i_sample_level = 1;
291 int i_flags = p_sys->i_flags;
292 int i_bytes_per_block = 256 * p_sys->i_nb_channels
297 * Do the actual decoding now.
300 /* Needs to be called so the decoder knows which type of bitstream it is
302 int i_sample_rate, i_bit_rate, i_frame_length;
303 if( !dts_syncinfo( p_sys->p_libdts, p_in_buf->p_buffer, &i_flags,
304 &i_sample_rate, &i_bit_rate, &i_frame_length ) )
306 msg_Warn( p_aout, "libdca couldn't sync on frame" );
307 p_out_buf->i_nb_samples = p_out_buf->i_nb_bytes = 0;
311 i_flags = p_sys->i_flags;
312 dts_frame( p_sys->p_libdts, p_in_buf->p_buffer,
313 &i_flags, &i_sample_level, 0 );
315 if ( (i_flags & DTS_CHANNEL_MASK) != (p_sys->i_flags & DTS_CHANNEL_MASK)
316 && !p_sys->b_dontwarn )
319 "libdca couldn't do the requested downmix 0x%x->0x%x",
320 p_sys->i_flags & DTS_CHANNEL_MASK,
321 i_flags & DTS_CHANNEL_MASK );
323 p_sys->b_dontwarn = 1;
326 if( 0)//!p_sys->b_dynrng )
328 dts_dynrng( p_sys->p_libdts, NULL, NULL );
331 for ( i = 0; i < dts_blocks_num(p_sys->p_libdts); i++ )
333 sample_t * p_samples;
335 if( dts_block( p_sys->p_libdts ) )
337 msg_Warn( p_aout, "dts_block failed for block %d", i );
341 p_samples = dts_samples( p_sys->p_libdts );
343 if ( (p_sys->i_flags & DTS_CHANNEL_MASK) == DTS_MONO
344 && (p_filter->output.i_physical_channels
345 & (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT)) )
347 Duplicate( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
350 else if ( p_filter->output.i_original_channels
351 & AOUT_CHAN_REVERSESTEREO )
353 Exchange( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
358 /* Interleave the *$£%ù samples. */
359 Interleave( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
360 p_samples, p_sys->i_nb_channels, p_sys->pi_chan_table);
364 p_out_buf->i_nb_samples = p_in_buf->i_nb_samples;
365 p_out_buf->i_nb_bytes = i_bytes_per_block * i;
368 /*****************************************************************************
369 * Destroy : deallocate data structures
370 *****************************************************************************/
371 static void Destroy( vlc_object_t *p_this )
373 aout_filter_t *p_filter = (aout_filter_t *)p_this;
374 filter_sys_t *p_sys = (filter_sys_t *)p_filter->p_sys;
376 dts_free( p_sys->p_libdts );
380 /*****************************************************************************
382 *****************************************************************************/
383 static int OpenFilter( vlc_object_t *p_this )
385 filter_t *p_filter = (filter_t *)p_this;
389 if( p_filter->fmt_in.i_codec != VLC_FOURCC('d','t','s',' ') )
394 p_filter->fmt_out.audio.i_format =
395 p_filter->fmt_out.i_codec = VLC_FOURCC('f','l','3','2');
397 /* Allocate the memory needed to store the module's structure */
398 p_sys = p_filter->p_sys = malloc( sizeof(filter_sys_t) );
401 msg_Err( p_filter, "out of memory" );
405 /* Allocate the memory needed to store the module's structure */
406 p_filter->p_sys = p_sys = malloc( sizeof(filter_sys_t) );
409 msg_Err( p_filter, "out of memory" );
413 i_ret = Open( VLC_OBJECT(p_filter), p_sys,
414 p_filter->fmt_in.audio, p_filter->fmt_out.audio );
416 p_filter->pf_audio_filter = Convert;
417 p_filter->fmt_out.audio.i_rate = p_filter->fmt_in.audio.i_rate;
422 /*****************************************************************************
423 * CloseFilter : deallocate data structures
424 *****************************************************************************/
425 static void CloseFilter( vlc_object_t *p_this )
427 filter_t *p_filter = (filter_t *)p_this;
428 filter_sys_t *p_sys = p_filter->p_sys;
430 dts_free( p_sys->p_libdts );
434 static block_t *Convert( filter_t *p_filter, block_t *p_block )
436 aout_filter_t aout_filter;
437 aout_buffer_t in_buf, out_buf;
441 if( !p_block || !p_block->i_samples )
443 if( p_block ) p_block->pf_release( p_block );
447 i_out_size = p_block->i_samples *
448 p_filter->fmt_out.audio.i_bitspersample *
449 p_filter->fmt_out.audio.i_channels / 8;
451 p_out = p_filter->pf_audio_buffer_new( p_filter, i_out_size );
454 msg_Warn( p_filter, "can't get output buffer" );
455 p_block->pf_release( p_block );
459 p_out->i_samples = p_block->i_samples;
460 p_out->i_dts = p_block->i_dts;
461 p_out->i_pts = p_block->i_pts;
462 p_out->i_length = p_block->i_length;
464 aout_filter.p_sys = (struct aout_filter_sys_t *)p_filter->p_sys;
465 aout_filter.input = p_filter->fmt_in.audio;
466 aout_filter.input.i_format = p_filter->fmt_in.i_codec;
467 aout_filter.output = p_filter->fmt_out.audio;
468 aout_filter.output.i_format = p_filter->fmt_out.i_codec;
470 in_buf.p_buffer = p_block->p_buffer;
471 in_buf.i_nb_bytes = p_block->i_buffer;
472 in_buf.i_nb_samples = p_block->i_samples;
473 out_buf.p_buffer = p_out->p_buffer;
474 out_buf.i_nb_bytes = p_out->i_buffer;
475 out_buf.i_nb_samples = p_out->i_samples;
477 DoWork( (aout_instance_t *)p_filter, &aout_filter, &in_buf, &out_buf );
479 p_out->i_buffer = out_buf.i_nb_bytes;
480 p_out->i_samples = out_buf.i_nb_samples;
482 p_block->pf_release( p_block );