1 /*****************************************************************************
2 * decoder.c: AAC decoder using libfaad2
3 *****************************************************************************
4 * Copyright (C) 2001, 2003 the VideoLAN team
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Gildas Bazin <gbazin@videolan.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
27 #include <vlc_codec.h>
28 #include <vlc_input.h>
32 /*****************************************************************************
34 *****************************************************************************/
35 static int Open( vlc_object_t * );
36 static void Close( vlc_object_t * );
39 set_description( _("AAC audio decoder (using libfaad2)") );
40 set_capability( "decoder", 100 );
41 set_category( CAT_INPUT );
42 set_subcategory( SUBCAT_INPUT_ACODEC );
43 set_callbacks( Open, Close );
46 /****************************************************************************
48 ****************************************************************************/
49 static aout_buffer_t *DecodeBlock( decoder_t *, block_t ** );
50 static void DoReordering( decoder_t *, uint32_t *, uint32_t *, int, int,
53 #define MAX_CHANNEL_POSITIONS 9
63 /* temporary buffer */
68 /* Channel positions of the current stream (for re-ordering) */
69 uint32_t pi_channel_positions[MAX_CHANNEL_POSITIONS];
71 vlc_bool_t b_sbr, b_ps;
76 static const uint32_t pi_channels_in[MAX_CHANNEL_POSITIONS] =
77 { FRONT_CHANNEL_CENTER, FRONT_CHANNEL_LEFT, FRONT_CHANNEL_RIGHT,
78 SIDE_CHANNEL_LEFT, SIDE_CHANNEL_RIGHT,
79 BACK_CHANNEL_LEFT, BACK_CHANNEL_RIGHT,
80 BACK_CHANNEL_CENTER, LFE_CHANNEL };
81 static const uint32_t pi_channels_out[MAX_CHANNEL_POSITIONS] =
82 { AOUT_CHAN_CENTER, AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
83 AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
84 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
85 AOUT_CHAN_REARCENTER, AOUT_CHAN_LFE };
86 static const uint32_t pi_channels_ordered[MAX_CHANNEL_POSITIONS] =
87 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
88 AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
89 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
90 AOUT_CHAN_CENTER, AOUT_CHAN_REARCENTER, AOUT_CHAN_LFE
93 /*****************************************************************************
94 * OpenDecoder: probe the decoder and return score
95 *****************************************************************************/
96 static int Open( vlc_object_t *p_this )
98 decoder_t *p_dec = (decoder_t*)p_this;
99 decoder_sys_t *p_sys = p_dec->p_sys;
100 faacDecConfiguration *cfg;
102 if( p_dec->fmt_in.i_codec != VLC_FOURCC('m','p','4','a') )
107 /* Allocate the memory needed to store the decoder's structure */
108 if( ( p_dec->p_sys = p_sys =
109 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
111 msg_Err( p_dec, "out of memory" );
115 /* Open a faad context */
116 if( ( p_sys->hfaad = faacDecOpen() ) == NULL )
118 msg_Err( p_dec, "cannot initialize faad" );
123 aout_DateSet( &p_sys->date, 0 );
124 p_dec->fmt_out.i_cat = AUDIO_ES;
126 if (vlc_CPU() & CPU_CAPABILITY_FPU)
127 p_dec->fmt_out.i_codec = VLC_FOURCC('f','l','3','2');
129 p_dec->fmt_out.i_codec = AOUT_FMT_S16_NE;
130 p_dec->pf_decode_audio = DecodeBlock;
132 p_dec->fmt_out.audio.i_physical_channels =
133 p_dec->fmt_out.audio.i_original_channels = 0;
135 if( p_dec->fmt_in.i_extra > 0 )
137 /* We have a decoder config so init the handle */
138 unsigned long i_rate;
139 unsigned char i_channels;
141 if( faacDecInit2( p_sys->hfaad, p_dec->fmt_in.p_extra,
142 p_dec->fmt_in.i_extra,
143 &i_rate, &i_channels ) < 0 )
148 p_dec->fmt_out.audio.i_rate = i_rate;
149 p_dec->fmt_out.audio.i_channels = i_channels;
150 aout_DateInit( &p_sys->date, i_rate );
154 /* Will be initalised from first frame */
155 p_dec->fmt_out.audio.i_rate = 0;
156 p_dec->fmt_out.audio.i_channels = 0;
159 /* Set the faad config */
160 cfg = faacDecGetCurrentConfiguration( p_sys->hfaad );
161 if (vlc_CPU() & CPU_CAPABILITY_FPU)
162 cfg->outputFormat = FAAD_FMT_FLOAT;
164 cfg->outputFormat = FAAD_FMT_16BIT;
165 faacDecSetConfiguration( p_sys->hfaad, cfg );
168 p_sys->i_buffer = p_sys->i_buffer_size = 0;
171 p_sys->i_input_rate = INPUT_RATE_DEFAULT;
173 /* Faad2 can't deal with truncated data (eg. from MPEG TS) */
174 p_dec->b_need_packetized = VLC_TRUE;
176 p_sys->b_sbr = p_sys->b_ps = VLC_FALSE;
180 /*****************************************************************************
182 *****************************************************************************/
183 static aout_buffer_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
185 decoder_sys_t *p_sys = p_dec->p_sys;
188 if( !pp_block || !*pp_block ) return NULL;
192 if( p_block->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
194 block_Release( p_block );
198 if( p_block->i_rate > 0 )
199 p_sys->i_input_rate = p_block->i_rate;
201 /* Append the block to the temporary buffer */
202 if( p_sys->i_buffer_size < p_sys->i_buffer + p_block->i_buffer )
204 p_sys->i_buffer_size = p_sys->i_buffer + p_block->i_buffer;
205 p_sys->p_buffer = realloc( p_sys->p_buffer, p_sys->i_buffer_size );
208 if( p_block->i_buffer )
210 memcpy( &p_sys->p_buffer[p_sys->i_buffer],
211 p_block->p_buffer, p_block->i_buffer );
212 p_sys->i_buffer += p_block->i_buffer;
213 p_block->i_buffer = 0;
216 if( p_dec->fmt_out.audio.i_rate == 0 && p_dec->fmt_in.i_extra > 0 )
218 /* We have a decoder config so init the handle */
219 unsigned long i_rate;
220 unsigned char i_channels;
222 if( faacDecInit2( p_sys->hfaad, p_dec->fmt_in.p_extra,
223 p_dec->fmt_in.i_extra,
224 &i_rate, &i_channels ) >= 0 )
226 p_dec->fmt_out.audio.i_rate = i_rate;
227 p_dec->fmt_out.audio.i_channels = i_channels;
228 aout_DateInit( &p_sys->date, i_rate );
232 if( p_dec->fmt_out.audio.i_rate == 0 && p_sys->i_buffer )
234 unsigned long i_rate;
235 unsigned char i_channels;
237 /* Init faad with the first frame */
238 if( faacDecInit( p_sys->hfaad,
239 p_sys->p_buffer, p_sys->i_buffer,
240 &i_rate, &i_channels ) < 0 )
242 block_Release( p_block );
246 p_dec->fmt_out.audio.i_rate = i_rate;
247 p_dec->fmt_out.audio.i_channels = i_channels;
248 aout_DateInit( &p_sys->date, i_rate );
251 if( p_block->i_pts != 0 && p_block->i_pts != aout_DateGet( &p_sys->date ) )
253 aout_DateSet( &p_sys->date, p_block->i_pts );
255 else if( !aout_DateGet( &p_sys->date ) )
257 /* We've just started the stream, wait for the first PTS. */
258 block_Release( p_block );
263 /* Decode all data */
264 if( p_sys->i_buffer )
267 faacDecFrameInfo frame;
268 aout_buffer_t *p_out;
271 samples = faacDecDecode( p_sys->hfaad, &frame,
272 p_sys->p_buffer, p_sys->i_buffer );
274 if( frame.error > 0 )
276 msg_Warn( p_dec, "%s", faacDecGetErrorMessage( frame.error ) );
278 /* Flush the buffer */
280 block_Release( p_block );
284 if( frame.channels <= 0 || frame.channels > 8 || frame.channels == 7 )
286 msg_Warn( p_dec, "invalid channels count: %i", frame.channels );
288 /* Flush the buffer */
289 p_sys->i_buffer -= frame.bytesconsumed;
290 if( p_sys->i_buffer > 0 )
292 memmove( p_sys->p_buffer,&p_sys->p_buffer[frame.bytesconsumed],
295 block_Release( p_block );
299 if( frame.samples <= 0 )
301 msg_Warn( p_dec, "decoded zero sample" );
303 /* Flush the buffer */
304 p_sys->i_buffer -= frame.bytesconsumed;
305 if( p_sys->i_buffer > 0 )
307 memmove( p_sys->p_buffer,&p_sys->p_buffer[frame.bytesconsumed],
310 block_Release( p_block );
314 /* We decoded a valid frame */
315 if( p_dec->fmt_out.audio.i_rate != frame.samplerate )
317 aout_DateInit( &p_sys->date, frame.samplerate );
318 aout_DateSet( &p_sys->date, p_block->i_pts );
320 p_block->i_pts = 0; /* PTS is valid only once */
322 p_dec->fmt_out.audio.i_rate = frame.samplerate;
323 p_dec->fmt_out.audio.i_channels = frame.channels;
325 /* Adjust stream info when dealing with SBR/PS */
326 if( (p_sys->b_sbr != frame.sbr || p_sys->b_ps != frame.ps) &&
327 p_dec->p_parent->i_object_type == VLC_OBJECT_INPUT )
329 input_thread_t *p_input = (input_thread_t *)p_dec->p_parent;
331 const char *psz_ext = (frame.sbr && frame.ps) ? "SBR+PS" :
332 frame.sbr ? "SBR" : "PS";
334 msg_Dbg( p_dec, "AAC %s (channels: %u, samplerate: %lu)",
335 psz_ext, frame.channels, frame.samplerate );
337 asprintf( &psz_cat, _("Stream %d"), p_dec->fmt_in.i_id );
338 input_Control( p_input, INPUT_ADD_INFO, psz_cat,
339 _("AAC extension"), "%s", psz_ext );
340 input_Control( p_input, INPUT_ADD_INFO, psz_cat,
341 _("Channels"), "%d", frame.channels );
342 input_Control( p_input, INPUT_ADD_INFO, psz_cat,
343 _("Sample rate"), _("%d Hz"), frame.samplerate );
345 p_sys->b_sbr = frame.sbr; p_sys->b_ps = frame.ps;
348 /* Convert frame.channel_position to our own channel values */
349 p_dec->fmt_out.audio.i_physical_channels = 0;
350 for( i = 0; i < frame.channels; i++ )
352 /* Find the channel code */
353 for( j = 0; j < MAX_CHANNEL_POSITIONS; j++ )
355 if( frame.channel_position[i] == pi_channels_in[j] )
358 if( j >= MAX_CHANNEL_POSITIONS )
360 msg_Warn( p_dec, "unknown channel ordering" );
361 /* Invent something */
365 p_sys->pi_channel_positions[i] = pi_channels_out[j];
366 if( p_dec->fmt_out.audio.i_physical_channels & pi_channels_out[j] )
367 frame.channels--; /* We loose a duplicated channel */
369 p_dec->fmt_out.audio.i_physical_channels |= pi_channels_out[j];
371 p_dec->fmt_out.audio.i_original_channels =
372 p_dec->fmt_out.audio.i_physical_channels;
374 p_out = p_dec->pf_aout_buffer_new(p_dec, frame.samples/frame.channels);
378 block_Release( p_block );
382 p_out->start_date = aout_DateGet( &p_sys->date );
383 p_out->end_date = aout_DateIncrement( &p_sys->date,
384 (frame.samples / frame.channels) * p_sys->i_input_rate / INPUT_RATE_DEFAULT );
386 DoReordering( p_dec, (uint32_t *)p_out->p_buffer, samples,
387 frame.samples / frame.channels, frame.channels,
388 p_sys->pi_channel_positions );
390 p_sys->i_buffer -= frame.bytesconsumed;
391 if( p_sys->i_buffer > 0 )
393 memmove( p_sys->p_buffer, &p_sys->p_buffer[frame.bytesconsumed],
400 block_Release( p_block );
404 /*****************************************************************************
406 *****************************************************************************/
407 static void Close( vlc_object_t *p_this )
409 decoder_t *p_dec = (decoder_t *)p_this;
410 decoder_sys_t *p_sys = p_dec->p_sys;
412 faacDecClose( p_sys->hfaad );
413 if( p_sys->p_buffer ) free( p_sys->p_buffer );
417 /*****************************************************************************
418 * DoReordering: do some channel re-ordering (the ac3 channel order is
419 * different from the aac one).
420 *****************************************************************************/
421 static void DoReordering( decoder_t *p_dec,
422 uint32_t *p_out, uint32_t *p_in, int i_samples,
423 int i_nb_channels, uint32_t *pi_chan_positions )
425 int pi_chan_table[MAX_CHANNEL_POSITIONS];
428 /* Find the channels mapping */
429 for( k = 0, j = 0; k < i_nb_channels; k++ )
431 for( i = 0; i < MAX_CHANNEL_POSITIONS; i++ )
433 if( pi_channels_ordered[i] == pi_chan_positions[k] )
435 pi_chan_table[k] = j++;
441 /* Do the actual reordering */
442 if( vlc_CPU() & CPU_CAPABILITY_FPU )
443 for( i = 0; i < i_samples; i++ )
444 for( j = 0; j < i_nb_channels; j++ )
445 p_out[i * i_nb_channels + pi_chan_table[j]] =
446 p_in[i * i_nb_channels + j];
448 for( i = 0; i < i_samples; i++ )
449 for( j = 0; j < i_nb_channels; j++ )
450 ((uint16_t *)p_out)[i * i_nb_channels + pi_chan_table[j]] =
451 ((uint16_t *)p_in)[i * i_nb_channels + j];