1 /*****************************************************************************
2 * dtstofloat32.c: DTS Coherent Acoustics decoder plugin for VLC.
3 * This plugin makes use of libdts to do the actual decoding
4 * (http://www.videolan.org/dtsdec/).
5 *****************************************************************************
6 * Copyright (C) 2001, 2002 VideoLAN
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
24 *****************************************************************************/
26 /*****************************************************************************
28 *****************************************************************************/
31 #include <stdlib.h> /* malloc(), free() */
32 #include <string.h> /* strdup() */
34 #include <dts.h> /* libdts 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 /* libdts 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; /* libdts internal structure */
70 vlc_bool_t b_dynrng; /* see below */
71 int i_flags; /* libdts 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_description( _("DTS Coherent Acoustics audio decoder") );
91 add_bool( "dts-dynrng", 1, NULL, DYNRNG_TEXT, DYNRNG_LONGTEXT, VLC_FALSE );
92 set_capability( "audio filter", 100 );
93 set_callbacks( Create, Destroy );
96 set_description( _("DTS Coherent Acoustics audio decoder") );
97 set_capability( "audio filter2", 100 );
98 set_callbacks( OpenFilter, CloseFilter );
101 /*****************************************************************************
103 *****************************************************************************/
104 static int Create( vlc_object_t *p_this )
106 aout_filter_t *p_filter = (aout_filter_t *)p_this;
110 if ( p_filter->input.i_format != VLC_FOURCC('d','t','s',' ')
111 || p_filter->output.i_format != VLC_FOURCC('f','l','3','2') )
116 if ( p_filter->input.i_rate != p_filter->output.i_rate )
121 /* Allocate the memory needed to store the module's structure */
122 p_sys = malloc( sizeof(filter_sys_t) );
123 p_filter->p_sys = (struct aout_filter_sys_t *)p_sys;
126 msg_Err( p_filter, "out of memory" );
130 i_ret = Open( VLC_OBJECT(p_filter), p_sys,
131 p_filter->input, p_filter->output );
133 p_filter->pf_do_work = DoWork;
134 p_filter->b_in_place = 0;
139 /*****************************************************************************
141 *****************************************************************************/
142 static int Open( vlc_object_t *p_this, filter_sys_t *p_sys,
143 audio_format_t input, audio_format_t output )
145 p_sys->b_dynrng = config_GetInt( p_this, "dts-dynrng" );
146 p_sys->b_dontwarn = 0;
148 /* We'll do our own downmixing, thanks. */
149 p_sys->i_nb_channels = aout_FormatNbChannels( &output );
150 switch ( (output.i_physical_channels & AOUT_CHAN_PHYSMASK)
153 case AOUT_CHAN_CENTER:
154 if ( (output.i_original_channels & AOUT_CHAN_CENTER)
155 || (output.i_original_channels
156 & (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT)) )
158 p_sys->i_flags = DTS_MONO;
162 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT:
163 if ( output.i_original_channels & AOUT_CHAN_DOLBYSTEREO )
165 p_sys->i_flags = DTS_DOLBY;
167 else if ( input.i_original_channels == AOUT_CHAN_CENTER )
169 p_sys->i_flags = DTS_MONO;
171 else if ( input.i_original_channels & AOUT_CHAN_DUALMONO )
173 p_sys->i_flags = DTS_CHANNEL;
177 p_sys->i_flags = DTS_STEREO;
181 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER:
182 p_sys->i_flags = DTS_3F;
185 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARCENTER:
186 p_sys->i_flags = DTS_2F1R;
189 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
190 | AOUT_CHAN_REARCENTER:
191 p_sys->i_flags = DTS_3F1R;
194 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
195 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT:
196 p_sys->i_flags = DTS_2F2R;
199 case AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
200 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT:
201 p_sys->i_flags = DTS_3F2R;
205 msg_Warn( p_this, "unknown sample format!" );
209 if ( output.i_physical_channels & AOUT_CHAN_LFE )
211 p_sys->i_flags |= DTS_LFE;
213 //p_sys->i_flags |= DTS_ADJUST_LEVEL;
215 /* Initialize libdts */
216 p_sys->p_libdts = dts_init( 0 );
217 if( p_sys->p_libdts == NULL )
219 msg_Err( p_this, "unable to initialize libdts" );
223 aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
224 output.i_physical_channels & AOUT_CHAN_PHYSMASK,
225 p_sys->i_nb_channels,
226 p_sys->pi_chan_table );
231 /*****************************************************************************
232 * Interleave: helper function to interleave channels
233 *****************************************************************************/
234 static void Interleave( float * p_out, const float * p_in, int i_nb_channels,
237 /* We do not only have to interleave, but also reorder the channels. */
240 for ( j = 0; j < i_nb_channels; j++ )
242 for ( i = 0; i < 256; i++ )
244 p_out[i * i_nb_channels + pi_chan_table[j]] = p_in[j * 256 + i];
249 /*****************************************************************************
250 * Duplicate: helper function to duplicate a unique channel
251 *****************************************************************************/
252 static void Duplicate( float * p_out, const float * p_in )
256 for ( i = 256; i--; )
264 /*****************************************************************************
265 * Exchange: helper function to exchange left & right channels
266 *****************************************************************************/
267 static void Exchange( float * p_out, const float * p_in )
270 const float * p_first = p_in + 256;
271 const float * p_second = p_in;
273 for ( i = 0; i < 256; i++ )
275 *p_out++ = *p_first++;
276 *p_out++ = *p_second++;
280 /*****************************************************************************
281 * DoWork: decode a DTS frame.
282 *****************************************************************************/
283 static void DoWork( aout_instance_t * p_aout, aout_filter_t * p_filter,
284 aout_buffer_t * p_in_buf, aout_buffer_t * p_out_buf )
286 filter_sys_t *p_sys = (filter_sys_t *)p_filter->p_sys;
287 sample_t i_sample_level = 1;
288 int i_flags = p_sys->i_flags;
289 int i_bytes_per_block = 256 * p_sys->i_nb_channels
294 * Do the actual decoding now.
297 /* Needs to be called so the decoder knows which type of bitstream it is
299 int i_sample_rate, i_bit_rate, i_frame_length;
300 if( !dts_syncinfo( p_sys->p_libdts, p_in_buf->p_buffer, &i_flags,
301 &i_sample_rate, &i_bit_rate, &i_frame_length ) )
303 msg_Warn( p_filter, "libdts couldn't sync on frame" );
304 p_out_buf->i_nb_samples = p_out_buf->i_nb_bytes = 0;
308 i_flags = p_sys->i_flags;
309 dts_frame( p_sys->p_libdts, p_in_buf->p_buffer,
310 &i_flags, &i_sample_level, 0 );
312 if ( (i_flags & DTS_CHANNEL_MASK) != (p_sys->i_flags & DTS_CHANNEL_MASK)
313 && !p_sys->b_dontwarn )
316 "libdts couldn't do the requested downmix 0x%x->0x%x",
317 p_sys->i_flags & DTS_CHANNEL_MASK,
318 i_flags & DTS_CHANNEL_MASK );
320 p_sys->b_dontwarn = 1;
323 if( 0)//!p_sys->b_dynrng )
325 dts_dynrng( p_sys->p_libdts, NULL, NULL );
328 for ( i = 0; i < dts_blocks_num(p_sys->p_libdts); i++ )
330 sample_t * p_samples;
332 if( dts_block( p_sys->p_libdts ) )
334 msg_Warn( p_filter, "dts_block failed for block %d", i );
338 p_samples = dts_samples( p_sys->p_libdts );
340 if ( (p_sys->i_flags & DTS_CHANNEL_MASK) == DTS_MONO
341 && (p_filter->output.i_physical_channels
342 & (AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT)) )
344 Duplicate( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
347 else if ( p_filter->output.i_original_channels
348 & AOUT_CHAN_REVERSESTEREO )
350 Exchange( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
355 /* Interleave the *$£%ù samples. */
356 Interleave( (float *)(p_out_buf->p_buffer + i * i_bytes_per_block),
357 p_samples, p_sys->i_nb_channels, p_sys->pi_chan_table);
361 p_out_buf->i_nb_samples = p_in_buf->i_nb_samples;
362 p_out_buf->i_nb_bytes = i_bytes_per_block * i;
365 /*****************************************************************************
366 * Destroy : deallocate data structures
367 *****************************************************************************/
368 static void Destroy( vlc_object_t *p_this )
370 aout_filter_t *p_filter = (aout_filter_t *)p_this;
371 filter_sys_t *p_sys = (filter_sys_t *)p_filter->p_sys;
373 dts_free( p_sys->p_libdts );
377 /*****************************************************************************
379 *****************************************************************************/
380 static int OpenFilter( vlc_object_t *p_this )
382 filter_t *p_filter = (filter_t *)p_this;
386 if( p_filter->fmt_in.i_codec != VLC_FOURCC('d','t','s',' ') )
391 p_filter->fmt_out.audio.i_format =
392 p_filter->fmt_out.i_codec = VLC_FOURCC('f','l','3','2');
394 /* Allocate the memory needed to store the module's structure */
395 p_sys = p_filter->p_sys = malloc( sizeof(filter_sys_t) );
398 msg_Err( p_filter, "out of memory" );
402 /* Allocate the memory needed to store the module's structure */
403 p_filter->p_sys = p_sys = malloc( sizeof(filter_sys_t) );
406 msg_Err( p_filter, "out of memory" );
410 i_ret = Open( VLC_OBJECT(p_filter), p_sys,
411 p_filter->fmt_in.audio, p_filter->fmt_out.audio );
413 p_filter->pf_audio_filter = Convert;
418 /*****************************************************************************
419 * CloseFilter : deallocate data structures
420 *****************************************************************************/
421 static void CloseFilter( vlc_object_t *p_this )
423 filter_t *p_filter = (filter_t *)p_this;
424 filter_sys_t *p_sys = p_filter->p_sys;
426 dts_free( p_sys->p_libdts );
430 static block_t *Convert( filter_t *p_filter, block_t *p_block )
432 aout_filter_t aout_filter;
433 aout_buffer_t in_buf, out_buf;
437 if( !p_block || !p_block->i_samples )
439 if( p_block ) p_block->pf_release( p_block );
443 i_out_size = p_block->i_samples *
444 p_filter->fmt_out.audio.i_bitspersample *
445 p_filter->fmt_out.audio.i_channels / 8;
447 p_out = p_filter->pf_audio_buffer_new( p_filter, i_out_size );
450 msg_Warn( p_filter, "can't get output buffer" );
451 p_block->pf_release( p_block );
455 p_out->i_samples = p_block->i_samples;
456 p_out->i_dts = p_block->i_dts;
457 p_out->i_pts = p_block->i_pts;
458 p_out->i_length = p_block->i_length;
460 aout_filter.p_sys = (struct aout_filter_sys_t *)p_filter->p_sys;
461 aout_filter.input = p_filter->fmt_in.audio;
462 aout_filter.input.i_format = p_filter->fmt_in.i_codec;
463 aout_filter.output = p_filter->fmt_out.audio;
464 aout_filter.output.i_format = p_filter->fmt_out.i_codec;
466 in_buf.p_buffer = p_block->p_buffer;
467 in_buf.i_nb_bytes = p_block->i_buffer;
468 in_buf.i_nb_samples = p_block->i_samples;
469 out_buf.p_buffer = p_out->p_buffer;
470 out_buf.i_nb_bytes = p_out->i_buffer;
471 out_buf.i_nb_samples = p_out->i_samples;
473 DoWork( (aout_instance_t *)p_filter, &aout_filter, &in_buf, &out_buf );
475 p_out->i_buffer = out_buf.i_nb_bytes;
476 p_out->i_samples = out_buf.i_nb_samples;
478 p_block->pf_release( p_block );