1 /*****************************************************************************
2 * araw.c: Pseudo audio decoder; for raw pcm data
3 *****************************************************************************
4 * Copyright (C) 2001, 2003 VLC authors and VideoLAN
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU Lesser General Public License as published by
11 * the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
33 #include <vlc_common.h>
34 #include <vlc_plugin.h>
35 #include <vlc_codec.h>
38 /*****************************************************************************
40 *****************************************************************************/
41 static int DecoderOpen ( vlc_object_t * );
42 static void DecoderClose( vlc_object_t * );
45 static int EncoderOpen ( vlc_object_t * );
49 /* audio decoder module */
50 set_description( N_("Raw/Log Audio decoder") )
51 set_capability( "decoder", 100 )
52 set_category( CAT_INPUT )
53 set_subcategory( SUBCAT_INPUT_ACODEC )
54 set_callbacks( DecoderOpen, DecoderClose )
57 /* audio encoder submodule */
59 set_description( N_("Raw audio encoder") )
60 set_capability( "encoder", 150 )
61 set_callbacks( EncoderOpen, NULL )
65 /*****************************************************************************
67 *****************************************************************************/
68 static block_t *DecodeBlock( decoder_t *, block_t ** );
72 void (*decode) (void *, const uint8_t *, unsigned);
77 static const uint16_t pi_channels_maps[] =
80 AOUT_CHAN_CENTER, AOUT_CHANS_2_0, AOUT_CHANS_3_0,
81 AOUT_CHANS_4_0, AOUT_CHANS_5_0, AOUT_CHANS_5_1,
82 AOUT_CHANS_7_0, AOUT_CHANS_7_1, AOUT_CHANS_8_1,
85 static void S8Decode( void *, const uint8_t *, unsigned );
86 static void U16BDecode( void *, const uint8_t *, unsigned );
87 static void U16LDecode( void *, const uint8_t *, unsigned );
88 static void S16IDecode( void *, const uint8_t *, unsigned );
89 static void S20BDecode( void *, const uint8_t *, unsigned );
90 static void U24BDecode( void *, const uint8_t *, unsigned );
91 static void U24LDecode( void *, const uint8_t *, unsigned );
92 static void S24BDecode( void *, const uint8_t *, unsigned );
93 static void S24LDecode( void *, const uint8_t *, unsigned );
94 static void S24B32Decode( void *, const uint8_t *, unsigned );
95 static void S24L32Decode( void *, const uint8_t *, unsigned );
96 static void U32BDecode( void *, const uint8_t *, unsigned );
97 static void U32LDecode( void *, const uint8_t *, unsigned );
98 static void S32IDecode( void *, const uint8_t *, unsigned );
99 static void F32IDecode( void *, const uint8_t *, unsigned );
100 static void F64IDecode( void *, const uint8_t *, unsigned );
101 static void DAT12Decode( void *, const uint8_t *, unsigned );
103 /*****************************************************************************
104 * DecoderOpen: probe the decoder and return score
105 *****************************************************************************/
106 static int DecoderOpen( vlc_object_t *p_this )
108 decoder_t *p_dec = (decoder_t*)p_this;
109 vlc_fourcc_t format = p_dec->fmt_in.i_codec;
111 switch( p_dec->fmt_in.i_codec )
113 case VLC_FOURCC('a','r','a','w'):
114 case VLC_FOURCC('a','f','l','t'):
115 /* _signed_ big endian samples (mov) */
116 case VLC_FOURCC('t','w','o','s'):
117 /* _signed_ little endian samples (mov) */
118 case VLC_FOURCC('s','o','w','t'):
120 vlc_fourcc_GetCodecAudio( p_dec->fmt_in.i_codec,
121 p_dec->fmt_in.audio.i_bitspersample );
124 msg_Err( p_dec, "bad parameters(bits/sample)" );
130 void (*decode) (void *, const uint8_t *, unsigned) = NULL;
135 #ifdef WORDS_BIGENDIAN
140 format = VLC_CODEC_FL64;
145 #ifdef WORDS_BIGENDIAN
150 format = VLC_CODEC_FL32;
156 format = VLC_CODEC_S32N;
161 format = VLC_CODEC_S32N;
166 format = VLC_CODEC_S32N;
171 case VLC_CODEC_S24B32:
172 format = VLC_CODEC_S32N;
173 decode = S24B32Decode;
176 case VLC_CODEC_S24L32:
177 format = VLC_CODEC_S32N;
178 decode = S24L32Decode;
182 format = VLC_CODEC_S32N;
187 format = VLC_CODEC_S32N;
192 format = VLC_CODEC_S32N;
197 format = VLC_CODEC_S32N;
202 format = VLC_CODEC_S32N;
207 format = VLC_CODEC_S16N;
212 format = VLC_CODEC_S16N;
217 format = VLC_CODEC_S16N;
222 case VLC_CODEC_DAT12:
223 format = VLC_CODEC_S16N;
224 decode = DAT12Decode;
229 format = VLC_CODEC_U8;
237 if( p_dec->fmt_in.audio.i_channels <= 0 ||
238 p_dec->fmt_in.audio.i_channels > AOUT_CHAN_MAX )
240 msg_Err( p_dec, "bad channels count (1-9): %i",
241 p_dec->fmt_in.audio.i_channels );
245 if( p_dec->fmt_in.audio.i_rate <= 0 )
247 msg_Err( p_dec, "bad samplerate: %d Hz", p_dec->fmt_in.audio.i_rate );
251 msg_Dbg( p_dec, "samplerate:%dHz channels:%d bits/sample:%d",
252 p_dec->fmt_in.audio.i_rate, p_dec->fmt_in.audio.i_channels,
253 p_dec->fmt_in.audio.i_bitspersample );
255 /* Allocate the memory needed to store the decoder's structure */
256 decoder_sys_t *p_sys = malloc(sizeof(*p_sys));
257 if( unlikely(p_sys == NULL) )
260 /* Set output properties */
261 p_dec->fmt_out.i_cat = AUDIO_ES;
262 p_dec->fmt_out.i_codec = format;
263 p_dec->fmt_out.audio.i_format = format;
264 p_dec->fmt_out.audio.i_rate = p_dec->fmt_in.audio.i_rate;
265 if( p_dec->fmt_in.audio.i_physical_channels )
266 p_dec->fmt_out.audio.i_physical_channels =
267 p_dec->fmt_in.audio.i_physical_channels;
269 p_dec->fmt_out.audio.i_physical_channels =
270 pi_channels_maps[p_dec->fmt_in.audio.i_channels];
271 if( p_dec->fmt_in.audio.i_original_channels )
272 p_dec->fmt_out.audio.i_original_channels =
273 p_dec->fmt_in.audio.i_original_channels;
275 p_dec->fmt_out.audio.i_original_channels =
276 p_dec->fmt_out.audio.i_physical_channels;
277 aout_FormatPrepare( &p_dec->fmt_out.audio );
279 p_sys->decode = decode;
280 p_sys->framebits = bits * p_dec->fmt_out.audio.i_channels;
281 assert( p_sys->framebits );
283 date_Init( &p_sys->end_date, p_dec->fmt_out.audio.i_rate, 1 );
284 date_Set( &p_sys->end_date, 0 );
286 p_dec->pf_decode_audio = DecodeBlock;
287 p_dec->p_sys = p_sys;
292 /****************************************************************************
293 * DecodeBlock: the whole thing
294 ****************************************************************************
295 * This function must be fed with whole samples (see nBlockAlign).
296 ****************************************************************************/
297 static block_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
299 decoder_sys_t *p_sys = p_dec->p_sys;
301 if( !pp_block || !*pp_block ) return NULL;
303 block_t *p_block = *pp_block;
305 if( p_block->i_pts > VLC_TS_INVALID &&
306 p_block->i_pts != date_Get( &p_sys->end_date ) )
308 date_Set( &p_sys->end_date, p_block->i_pts );
310 else if( !date_Get( &p_sys->end_date ) )
312 /* We've just started the stream, wait for the first PTS. */
313 block_Release( p_block );
317 /* Don't re-use the same pts twice */
318 p_block->i_pts = VLC_TS_INVALID;
320 unsigned samples = (8 * p_block->i_buffer) / p_sys->framebits;
323 block_Release( p_block );
327 /* Create chunks of max 1024 samples */
328 if( samples > 1024 ) samples = 1024;
330 block_t *p_out = decoder_NewAudioBuffer( p_dec, samples );
333 block_Release( p_block );
337 p_out->i_pts = date_Get( &p_sys->end_date );
338 p_out->i_length = date_Increment( &p_sys->end_date, samples )
341 if( p_sys->decode != NULL )
342 p_sys->decode( p_out->p_buffer, p_block->p_buffer,
343 samples * p_dec->fmt_in.audio.i_channels );
345 memcpy( p_out->p_buffer, p_block->p_buffer, p_out->i_buffer );
347 samples = (samples * p_sys->framebits) / 8;
348 p_block->p_buffer += samples;
349 p_block->i_buffer -= samples;
354 static void S8Decode( void *outp, const uint8_t *in, unsigned samples )
358 for( size_t i = 0; i < samples; i++ )
359 out[i] = in[i] ^ 0x80;
362 static void U16BDecode( void *outp, const uint8_t *in, unsigned samples )
364 uint16_t *out = outp;
366 for( size_t i = 0; i < samples; i++ )
368 *(out++) = GetWBE( in ) - 0x8000;
373 static void U16LDecode( void *outp, const uint8_t *in, unsigned samples )
375 uint16_t *out = outp;
377 for( size_t i = 0; i < samples; i++ )
379 *(out++) = GetWLE( in ) - 0x8000;
384 static void S16IDecode( void *out, const uint8_t *in, unsigned samples )
386 swab( in, out, samples * 2 );
389 static void S20BDecode( void *outp, const uint8_t *in, unsigned samples )
393 while( samples >= 2 )
395 uint32_t dw = U32_AT(in);
397 *(out++) = dw & ~0xFFF;
398 *(out++) = (dw << 20) | (*in << 12);
403 /* No U32_AT() for the last odd sample: avoid off-by-one overflow! */
405 *(out++) = (U16_AT(in) << 16) | ((in[2] & 0xF0) << 8);
408 static void U24BDecode( void *outp, const uint8_t *in, unsigned samples )
410 uint32_t *out = outp;
412 for( size_t i = 0; i < samples; i++ )
414 uint32_t s = ((in[0] << 24) | (in[1] << 16) | (in[2] << 8)) - 0x80000000;
420 static void U24LDecode( void *outp, const uint8_t *in, unsigned samples )
422 uint32_t *out = outp;
424 for( size_t i = 0; i < samples; i++ )
426 uint32_t s = ((in[2] << 24) | (in[1] << 16) | (in[0] << 8)) - 0x80000000;
432 static void S24BDecode( void *outp, const uint8_t *in, unsigned samples )
434 uint32_t *out = outp;
436 for( size_t i = 0; i < samples; i++ )
438 uint32_t s = ((in[0] << 24) | (in[1] << 16) | (in[2] << 8));
444 static void S24LDecode( void *outp, const uint8_t *in, unsigned samples )
446 uint32_t *out = outp;
448 for( size_t i = 0; i < samples; i++ )
450 uint32_t s = ((in[2] << 24) | (in[1] << 16) | (in[0] << 8));
456 static void S24B32Decode( void *outp, const uint8_t *in, unsigned samples )
458 uint32_t *out = outp;
460 for( size_t i = 0; i < samples; i++ )
462 *(out++) = GetDWBE( in ) << 8;
467 static void S24L32Decode( void *outp, const uint8_t *in, unsigned samples )
469 uint32_t *out = outp;
471 for( size_t i = 0; i < samples; i++ )
473 *(out++) = GetDWLE( in ) << 8;
478 static void U32BDecode( void *outp, const uint8_t *in, unsigned samples )
480 uint32_t *out = outp;
482 for( size_t i = 0; i < samples; i++ )
484 *(out++) = GetDWBE( in ) - 0x80000000;
489 static void U32LDecode( void *outp, const uint8_t *in, unsigned samples )
491 uint32_t *out = outp;
493 for( size_t i = 0; i < samples; i++ )
495 *(out++) = GetDWLE( in ) - 0x80000000;
500 static void S32IDecode( void *outp, const uint8_t *in, unsigned samples )
504 for( size_t i = 0; i < samples; i++ )
506 #ifdef WORDS_BIGENDIAN
507 *(out++) = GetDWLE( in );
509 *(out++) = GetDWBE( in );
515 static void F32IDecode( void *outp, const uint8_t *in, unsigned samples )
519 for( size_t i = 0; i < samples; i++ )
521 union { float f; uint32_t u; } s;
523 #ifdef WORDS_BIGENDIAN
533 static void F64IDecode( void *outp, const uint8_t *in, unsigned samples )
537 for( size_t i = 0; i < samples; i++ )
539 union { double d; uint64_t u; } s;
541 #ifdef WORDS_BIGENDIAN
551 static int16_t dat12tos16( uint16_t y )
553 static const uint16_t diff[16] = {
554 0x0000, 0x0000, 0x0100, 0x0200, 0x0300, 0x0400, 0x0500, 0x0600,
555 0x0A00, 0x0B00, 0x0C00, 0x0D00, 0x0E00, 0x0F00, 0x1000, 0x1000 };
556 static const uint8_t shift[16] = {
557 0, 0, 1, 2, 3, 4, 5, 6, 6, 5, 4, 3, 2, 1, 0, 0 };
560 return (y - diff[d]) << shift[d];
563 static void DAT12Decode( void *outp, const uint8_t *in, unsigned samples )
567 while( samples >= 2 )
569 *(out++) = dat12tos16(U16_AT(in) >> 4);
570 *(out++) = dat12tos16(U16_AT(in + 1) & ~0xF000);
576 *(out++) = dat12tos16(U16_AT(in) >> 4);
579 /*****************************************************************************
580 * DecoderClose: decoder destruction
581 *****************************************************************************/
582 static void DecoderClose( vlc_object_t *p_this )
584 decoder_t *p_dec = (decoder_t *)p_this;
586 free( p_dec->p_sys );
590 /* NOTE: Output buffers are always aligned since they are allocated by the araw plugin.
591 * Contrary to the decoder, the encoder can also assume that input buffers are aligned,
592 * since decoded audio blocks must always be aligned. */
594 static void U16IEncode( void *outp, const uint8_t *inp, unsigned samples )
596 const uint16_t *in = (const uint16_t *)inp;
597 uint16_t *out = outp;
599 for( size_t i = 0; i < samples; i++ )
600 *(out++) = bswap16( *(in++) + 0x8000 );
603 static void U16NEncode( void *outp, const uint8_t *inp, unsigned samples )
605 const uint16_t *in = (const uint16_t *)inp;
606 uint16_t *out = outp;
608 for( size_t i = 0; i < samples; i++ )
609 *(out++) = *(in++) + 0x8000;
612 static void U24BEncode( void *outp, const uint8_t *inp, unsigned samples )
614 const uint32_t *in = (const uint32_t *)inp;
617 for( size_t i = 0; i < samples; i++ )
619 uint32_t s = *(in++);
620 *(out++) = (s >> 24) + 0x80;
621 *(out++) = (s >> 16);
626 static void U24LEncode( void *outp, const uint8_t *inp, unsigned samples )
628 const uint32_t *in = (const uint32_t *)inp;
631 for( size_t i = 0; i < samples; i++ )
633 uint32_t s = *(in++);
635 *(out++) = (s >> 16);
636 *(out++) = (s >> 24) + 0x80;
640 static void S24BEncode( void *outp, const uint8_t *inp, unsigned samples )
642 const uint32_t *in = (const uint32_t *)inp;
645 for( size_t i = 0; i < samples; i++ )
647 uint32_t s = *(in++);
648 *(out++) = (s >> 24);
649 *(out++) = (s >> 16);
654 static void S24LEncode( void *outp, const uint8_t *inp, unsigned samples )
656 const uint32_t *in = (const uint32_t *)inp;
659 for( size_t i = 0; i < samples; i++ )
661 uint32_t s = *(in++);
663 *(out++) = (s >> 16);
664 *(out++) = (s >> 24);
668 static void U32IEncode( void *outp, const uint8_t *inp, unsigned samples )
670 const uint32_t *in = (const uint32_t *)inp;
671 uint32_t *out = outp;
673 for( size_t i = 0; i < samples; i++ )
674 *(out++) = bswap32( *(in++) + 0x80000000 );
677 static void U32NEncode( void *outp, const uint8_t *inp, unsigned samples )
679 const uint32_t *in = (const uint32_t *)inp;
680 uint32_t *out = outp;
682 for( size_t i = 0; i < samples; i++ )
683 *(out++) = *(in++) + 0x80000000;
686 static void S32IEncode( void *outp, const uint8_t *inp, unsigned samples )
688 const int32_t *in = (const int32_t *)inp;
691 for( size_t i = 0; i < samples; i++ )
692 *(out++) = bswap32( *(in++) );
695 static void F32IEncode( void *outp, const uint8_t *inp, unsigned samples )
697 const float *in = (const float *)inp;
700 for( size_t i = 0; i < samples; i++ )
702 union { float f; uint32_t u; char b[4]; } s;
705 s.u = bswap32( s.u );
706 memcpy( out, s.b, 4 );
711 static void F64IEncode( void *outp, const uint8_t *inp, unsigned samples )
713 const double *in = (const double *)inp;
716 for( size_t i = 0; i < samples; i++ )
718 union { double d; uint64_t u; char b[8]; } s;
721 s.u = bswap64( s.u );
722 memcpy( out, s.b, 8 );
727 static block_t *Encode( encoder_t *enc, block_t *in )
732 block_t *out = block_Alloc( in->i_nb_samples
733 * enc->fmt_out.audio.i_bytes_per_frame );
734 if( unlikely(out == NULL) )
737 out->i_flags = in->i_flags;
738 out->i_nb_samples = in->i_nb_samples;
739 out->i_dts = in->i_dts;
740 out->i_pts = in->i_pts;
741 out->i_length = in->i_length;
742 out->i_nb_samples = in->i_nb_samples;
744 void (*encode)(void *, const uint8_t *, unsigned) = (void *)enc->p_sys;
746 encode( out->p_buffer, in->p_buffer, in->i_nb_samples
747 * enc->fmt_out.audio.i_channels );
749 memcpy( out->p_buffer, in->p_buffer, in->i_buffer );
754 * Probes the PCM audio encoder.
756 static int EncoderOpen( vlc_object_t *p_this )
758 encoder_t *p_enc = (encoder_t *)p_this;
759 void (*encode)(void *, const uint8_t *, unsigned) = NULL;
761 switch( p_enc->fmt_out.i_codec )
766 p_enc->fmt_in.i_codec = VLC_CODEC_U8;
767 p_enc->fmt_out.audio.i_bitspersample = 8;
771 p_enc->fmt_in.i_codec = VLC_CODEC_S16N;
772 p_enc->fmt_out.audio.i_bitspersample = 16;
776 p_enc->fmt_in.i_codec = VLC_CODEC_S16N;
777 p_enc->fmt_out.audio.i_bitspersample = 16;
782 p_enc->fmt_in.i_codec = VLC_CODEC_S16N;
783 p_enc->fmt_out.audio.i_bitspersample = 16;
787 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
788 p_enc->fmt_out.audio.i_bitspersample = 24;
792 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
793 p_enc->fmt_out.audio.i_bitspersample = 24;
797 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
798 p_enc->fmt_out.audio.i_bitspersample = 24;
802 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
803 p_enc->fmt_out.audio.i_bitspersample = 24;
807 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
808 p_enc->fmt_out.audio.i_bitspersample = 32;
812 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
813 p_enc->fmt_out.audio.i_bitspersample = 32;
818 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
819 p_enc->fmt_out.audio.i_bitspersample = 32;
821 #ifdef WORDS_BIGENDIAN
828 p_enc->fmt_in.i_codec = VLC_CODEC_FL32;
829 p_enc->fmt_out.audio.i_bitspersample = 32;
831 #ifdef WORDS_BIGENDIAN
838 p_enc->fmt_in.i_codec = VLC_CODEC_FL64;
839 p_enc->fmt_out.audio.i_bitspersample = 64;
845 p_enc->p_sys = (void *)encode;
846 p_enc->pf_encode_audio = Encode;
847 p_enc->fmt_out.audio.i_bytes_per_frame =
848 (p_enc->fmt_out.audio.i_bitspersample / 8) *
849 p_enc->fmt_in.audio.i_channels;
850 p_enc->fmt_out.i_bitrate =
851 p_enc->fmt_in.audio.i_channels *
852 p_enc->fmt_in.audio.i_rate *
853 p_enc->fmt_out.audio.i_bitspersample;
855 msg_Dbg( p_enc, "samplerate:%dHz channels:%d bits/sample:%d",
856 p_enc->fmt_out.audio.i_rate, p_enc->fmt_out.audio.i_channels,
857 p_enc->fmt_out.audio.i_bitspersample );
861 #endif /* ENABLE_SOUT */