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 *****************************************************************************/
34 #include <vlc_common.h>
35 #include <vlc_plugin.h>
36 #include <vlc_codec.h>
39 /*****************************************************************************
41 *****************************************************************************/
42 static int DecoderOpen ( vlc_object_t * );
43 static void DecoderClose( vlc_object_t * );
46 static int EncoderOpen ( vlc_object_t * );
50 /* audio decoder module */
51 set_description( N_("Raw/Log Audio decoder") )
52 set_capability( "decoder", 100 )
53 set_category( CAT_INPUT )
54 set_subcategory( SUBCAT_INPUT_ACODEC )
55 set_callbacks( DecoderOpen, DecoderClose )
58 /* audio encoder submodule */
60 set_description( N_("Raw audio encoder") )
61 set_capability( "encoder", 150 )
62 set_callbacks( EncoderOpen, NULL )
66 /*****************************************************************************
68 *****************************************************************************/
69 static block_t *DecodeBlock( decoder_t *, block_t ** );
73 void (*decode) (void *, const uint8_t *, unsigned);
78 static const uint16_t pi_channels_maps[] =
81 AOUT_CHAN_CENTER, AOUT_CHANS_2_0, AOUT_CHANS_3_0,
82 AOUT_CHANS_4_0, AOUT_CHANS_5_0, AOUT_CHANS_5_1,
83 AOUT_CHANS_7_0, AOUT_CHANS_7_1, AOUT_CHANS_8_1,
86 static void S8Decode( void *, const uint8_t *, unsigned );
87 static void U16BDecode( void *, const uint8_t *, unsigned );
88 static void U16LDecode( void *, const uint8_t *, unsigned );
89 static void S16IDecode( void *, const uint8_t *, unsigned );
90 static void S20BDecode( void *, const uint8_t *, unsigned );
91 static void U24BDecode( void *, const uint8_t *, unsigned );
92 static void U24LDecode( void *, const uint8_t *, unsigned );
93 static void S24BDecode( void *, const uint8_t *, unsigned );
94 static void S24LDecode( void *, const uint8_t *, unsigned );
95 static void S24B32Decode( void *, const uint8_t *, unsigned );
96 static void S24L32Decode( void *, const uint8_t *, unsigned );
97 static void U32BDecode( void *, const uint8_t *, unsigned );
98 static void U32LDecode( void *, const uint8_t *, unsigned );
99 static void S32IDecode( void *, const uint8_t *, unsigned );
100 static void F32NDecode( void *, const uint8_t *, unsigned );
101 static void F32IDecode( void *, const uint8_t *, unsigned );
102 static void F64NDecode( void *, const uint8_t *, unsigned );
103 static void F64IDecode( void *, const uint8_t *, unsigned );
104 static void DAT12Decode( void *, const uint8_t *, unsigned );
106 /*****************************************************************************
107 * DecoderOpen: probe the decoder and return score
108 *****************************************************************************/
109 static int DecoderOpen( vlc_object_t *p_this )
111 decoder_t *p_dec = (decoder_t*)p_this;
112 vlc_fourcc_t format = p_dec->fmt_in.i_codec;
114 switch( p_dec->fmt_in.i_codec )
116 case VLC_FOURCC('a','r','a','w'):
117 case VLC_FOURCC('a','f','l','t'):
118 /* _signed_ big endian samples (mov) */
119 case VLC_FOURCC('t','w','o','s'):
120 /* _signed_ little endian samples (mov) */
121 case VLC_FOURCC('s','o','w','t'):
123 vlc_fourcc_GetCodecAudio( p_dec->fmt_in.i_codec,
124 p_dec->fmt_in.audio.i_bitspersample );
127 msg_Err( p_dec, "bad parameters(bits/sample)" );
133 void (*decode) (void *, const uint8_t *, unsigned) = NULL;
138 #ifdef WORDS_BIGENDIAN
143 format = VLC_CODEC_FL64;
151 #ifdef WORDS_BIGENDIAN
156 format = VLC_CODEC_FL32;
165 format = VLC_CODEC_S32N;
170 format = VLC_CODEC_S32N;
175 format = VLC_CODEC_S32N;
180 case VLC_CODEC_S24B32:
181 format = VLC_CODEC_S32N;
182 decode = S24B32Decode;
185 case VLC_CODEC_S24L32:
186 format = VLC_CODEC_S32N;
187 decode = S24L32Decode;
191 format = VLC_CODEC_S32N;
196 format = VLC_CODEC_S32N;
201 format = VLC_CODEC_S32N;
206 format = VLC_CODEC_S32N;
211 format = VLC_CODEC_S32N;
216 format = VLC_CODEC_S16N;
221 format = VLC_CODEC_S16N;
226 format = VLC_CODEC_S16N;
231 case VLC_CODEC_DAT12:
232 format = VLC_CODEC_S16N;
233 decode = DAT12Decode;
238 format = VLC_CODEC_U8;
246 if( p_dec->fmt_in.audio.i_channels <= 0 ||
247 p_dec->fmt_in.audio.i_channels > AOUT_CHAN_MAX )
249 msg_Err( p_dec, "bad channels count (1-9): %i",
250 p_dec->fmt_in.audio.i_channels );
254 if( p_dec->fmt_in.audio.i_rate <= 0 )
256 msg_Err( p_dec, "bad samplerate: %d Hz", p_dec->fmt_in.audio.i_rate );
260 msg_Dbg( p_dec, "samplerate:%dHz channels:%d bits/sample:%d",
261 p_dec->fmt_in.audio.i_rate, p_dec->fmt_in.audio.i_channels,
262 p_dec->fmt_in.audio.i_bitspersample );
264 /* Allocate the memory needed to store the decoder's structure */
265 decoder_sys_t *p_sys = malloc(sizeof(*p_sys));
266 if( unlikely(p_sys == NULL) )
269 /* Set output properties */
270 p_dec->fmt_out.i_cat = AUDIO_ES;
271 p_dec->fmt_out.i_codec = format;
272 p_dec->fmt_out.audio.i_format = format;
273 p_dec->fmt_out.audio.i_rate = p_dec->fmt_in.audio.i_rate;
274 if( p_dec->fmt_in.audio.i_physical_channels )
275 p_dec->fmt_out.audio.i_physical_channels =
276 p_dec->fmt_in.audio.i_physical_channels;
278 p_dec->fmt_out.audio.i_physical_channels =
279 pi_channels_maps[p_dec->fmt_in.audio.i_channels];
280 if( p_dec->fmt_in.audio.i_original_channels )
281 p_dec->fmt_out.audio.i_original_channels =
282 p_dec->fmt_in.audio.i_original_channels;
284 p_dec->fmt_out.audio.i_original_channels =
285 p_dec->fmt_out.audio.i_physical_channels;
286 aout_FormatPrepare( &p_dec->fmt_out.audio );
288 p_sys->decode = decode;
289 p_sys->framebits = bits * p_dec->fmt_out.audio.i_channels;
290 assert( p_sys->framebits );
292 date_Init( &p_sys->end_date, p_dec->fmt_out.audio.i_rate, 1 );
293 date_Set( &p_sys->end_date, 0 );
295 p_dec->pf_decode_audio = DecodeBlock;
296 p_dec->p_sys = p_sys;
301 /****************************************************************************
302 * DecodeBlock: the whole thing
303 ****************************************************************************
304 * This function must be fed with whole samples (see nBlockAlign).
305 ****************************************************************************/
306 static block_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
308 decoder_sys_t *p_sys = p_dec->p_sys;
309 if( pp_block == NULL )
312 block_t *p_block = *pp_block;
313 if( p_block == NULL )
317 if( p_block->i_pts > VLC_TS_INVALID &&
318 p_block->i_pts != date_Get( &p_sys->end_date ) )
320 date_Set( &p_sys->end_date, p_block->i_pts );
322 else if( !date_Get( &p_sys->end_date ) )
323 /* We've just started the stream, wait for the first PTS. */
326 unsigned samples = (8 * p_block->i_buffer) / p_sys->framebits;
330 if( p_sys->decode != NULL )
332 block_t *p_out = decoder_NewAudioBuffer( p_dec, samples );
336 p_sys->decode( p_out->p_buffer, p_block->p_buffer,
337 samples * p_dec->fmt_in.audio.i_channels );
338 block_Release( p_block );
343 decoder_UpdateAudioFormat( p_dec );
344 p_block->i_nb_samples = samples;
345 p_block->i_buffer = samples * (p_sys->framebits / 8);
348 p_block->i_pts = date_Get( &p_sys->end_date );
349 p_block->i_length = date_Increment( &p_sys->end_date, samples )
353 block_Release( p_block );
357 static void S8Decode( void *outp, const uint8_t *in, unsigned samples )
361 for( size_t i = 0; i < samples; i++ )
362 out[i] = in[i] ^ 0x80;
365 static void U16BDecode( void *outp, const uint8_t *in, unsigned samples )
367 uint16_t *out = outp;
369 for( size_t i = 0; i < samples; i++ )
371 *(out++) = GetWBE( in ) - 0x8000;
376 static void U16LDecode( void *outp, const uint8_t *in, unsigned samples )
378 uint16_t *out = outp;
380 for( size_t i = 0; i < samples; i++ )
382 *(out++) = GetWLE( in ) - 0x8000;
387 static void S16IDecode( void *out, const uint8_t *in, unsigned samples )
389 swab( in, out, samples * 2 );
392 static void S20BDecode( void *outp, const uint8_t *in, unsigned samples )
396 while( samples >= 2 )
398 uint32_t dw = U32_AT(in);
400 *(out++) = dw & ~0xFFF;
401 *(out++) = (dw << 20) | (*in << 12);
406 /* No U32_AT() for the last odd sample: avoid off-by-one overflow! */
408 *(out++) = (U16_AT(in) << 16) | ((in[2] & 0xF0) << 8);
411 static void U24BDecode( void *outp, const uint8_t *in, unsigned samples )
413 uint32_t *out = outp;
415 for( size_t i = 0; i < samples; i++ )
417 uint32_t s = ((in[0] << 24) | (in[1] << 16) | (in[2] << 8)) - 0x80000000;
423 static void U24LDecode( void *outp, const uint8_t *in, unsigned samples )
425 uint32_t *out = outp;
427 for( size_t i = 0; i < samples; i++ )
429 uint32_t s = ((in[2] << 24) | (in[1] << 16) | (in[0] << 8)) - 0x80000000;
435 static void S24BDecode( void *outp, const uint8_t *in, unsigned samples )
437 uint32_t *out = outp;
439 for( size_t i = 0; i < samples; i++ )
441 uint32_t s = ((in[0] << 24) | (in[1] << 16) | (in[2] << 8));
447 static void S24LDecode( void *outp, const uint8_t *in, unsigned samples )
449 uint32_t *out = outp;
451 for( size_t i = 0; i < samples; i++ )
453 uint32_t s = ((in[2] << 24) | (in[1] << 16) | (in[0] << 8));
459 static void S24B32Decode( void *outp, const uint8_t *in, unsigned samples )
461 uint32_t *out = outp;
463 for( size_t i = 0; i < samples; i++ )
465 *(out++) = GetDWBE( in ) << 8;
470 static void S24L32Decode( void *outp, const uint8_t *in, unsigned samples )
472 uint32_t *out = outp;
474 for( size_t i = 0; i < samples; i++ )
476 *(out++) = GetDWLE( in ) << 8;
481 static void U32BDecode( void *outp, const uint8_t *in, unsigned samples )
483 uint32_t *out = outp;
485 for( size_t i = 0; i < samples; i++ )
487 *(out++) = GetDWBE( in ) - 0x80000000;
492 static void U32LDecode( void *outp, const uint8_t *in, unsigned samples )
494 uint32_t *out = outp;
496 for( size_t i = 0; i < samples; i++ )
498 *(out++) = GetDWLE( in ) - 0x80000000;
503 static void S32IDecode( void *outp, const uint8_t *in, unsigned samples )
507 for( size_t i = 0; i < samples; i++ )
509 #ifdef WORDS_BIGENDIAN
510 *(out++) = GetDWLE( in );
512 *(out++) = GetDWBE( in );
518 static void F32NDecode( void *outp, const uint8_t *in, unsigned samples )
522 for( size_t i = 0; i < samples; i++ )
524 memcpy( out, in, sizeof(float) );
525 if( unlikely(!isfinite(*out)) )
532 static void F32IDecode( void *outp, const uint8_t *in, unsigned samples )
536 for( size_t i = 0; i < samples; i++ )
538 union { float f; uint32_t u; } s;
540 #ifdef WORDS_BIGENDIAN
545 if( unlikely(!isfinite(s.f)) )
552 static void F64NDecode( void *outp, const uint8_t *in, unsigned samples )
556 for( size_t i = 0; i < samples; i++ )
558 memcpy( out, in, sizeof(double) );
559 if( unlikely(!isfinite( *out )) )
562 in += sizeof(double);
566 static void F64IDecode( void *outp, const uint8_t *in, unsigned samples )
570 for( size_t i = 0; i < samples; i++ )
572 union { double d; uint64_t u; } s;
574 #ifdef WORDS_BIGENDIAN
579 if( unlikely(!isfinite( s.d )) )
586 static int16_t dat12tos16( uint_fast16_t y )
588 static const uint16_t diff[16] = {
589 0x0000, 0x0000, 0x0100, 0x0200, 0x0300, 0x0400, 0x0500, 0x0600,
590 0x0A00, 0x0B00, 0x0C00, 0x0D00, 0x0E00, 0x0F00, 0x1000, 0x1000 };
591 static const uint8_t shift[16] = {
592 0, 0, 1, 2, 3, 4, 5, 6, 6, 5, 4, 3, 2, 1, 0, 0 };
597 return (y - diff[d]) << shift[d];
600 static void DAT12Decode( void *outp, const uint8_t *in, unsigned samples )
604 while( samples >= 2 )
606 *(out++) = dat12tos16(U16_AT(in) >> 4);
607 *(out++) = dat12tos16(U16_AT(in + 1) & ~0xF000);
613 *(out++) = dat12tos16(U16_AT(in) >> 4);
616 /*****************************************************************************
617 * DecoderClose: decoder destruction
618 *****************************************************************************/
619 static void DecoderClose( vlc_object_t *p_this )
621 decoder_t *p_dec = (decoder_t *)p_this;
623 free( p_dec->p_sys );
627 /* NOTE: Output buffers are always aligned since they are allocated by the araw plugin.
628 * Contrary to the decoder, the encoder can also assume that input buffers are aligned,
629 * since decoded audio blocks must always be aligned. */
631 static void U16IEncode( void *outp, const uint8_t *inp, unsigned samples )
633 const uint16_t *in = (const uint16_t *)inp;
634 uint16_t *out = outp;
636 for( size_t i = 0; i < samples; i++ )
637 *(out++) = bswap16( *(in++) + 0x8000 );
640 static void U16NEncode( void *outp, const uint8_t *inp, unsigned samples )
642 const uint16_t *in = (const uint16_t *)inp;
643 uint16_t *out = outp;
645 for( size_t i = 0; i < samples; i++ )
646 *(out++) = *(in++) + 0x8000;
649 static void U24BEncode( void *outp, const uint8_t *inp, unsigned samples )
651 const uint32_t *in = (const uint32_t *)inp;
654 for( size_t i = 0; i < samples; i++ )
656 uint32_t s = *(in++);
657 *(out++) = (s >> 24) + 0x80;
658 *(out++) = (s >> 16);
663 static void U24LEncode( void *outp, const uint8_t *inp, unsigned samples )
665 const uint32_t *in = (const uint32_t *)inp;
668 for( size_t i = 0; i < samples; i++ )
670 uint32_t s = *(in++);
672 *(out++) = (s >> 16);
673 *(out++) = (s >> 24) + 0x80;
677 static void S24BEncode( void *outp, const uint8_t *inp, unsigned samples )
679 const uint32_t *in = (const uint32_t *)inp;
682 for( size_t i = 0; i < samples; i++ )
684 uint32_t s = *(in++);
685 *(out++) = (s >> 24);
686 *(out++) = (s >> 16);
691 static void S24LEncode( void *outp, const uint8_t *inp, unsigned samples )
693 const uint32_t *in = (const uint32_t *)inp;
696 for( size_t i = 0; i < samples; i++ )
698 uint32_t s = *(in++);
700 *(out++) = (s >> 16);
701 *(out++) = (s >> 24);
705 static void U32IEncode( void *outp, const uint8_t *inp, unsigned samples )
707 const uint32_t *in = (const uint32_t *)inp;
708 uint32_t *out = outp;
710 for( size_t i = 0; i < samples; i++ )
711 *(out++) = bswap32( *(in++) + 0x80000000 );
714 static void U32NEncode( void *outp, const uint8_t *inp, unsigned samples )
716 const uint32_t *in = (const uint32_t *)inp;
717 uint32_t *out = outp;
719 for( size_t i = 0; i < samples; i++ )
720 *(out++) = *(in++) + 0x80000000;
723 static void S32IEncode( void *outp, const uint8_t *inp, unsigned samples )
725 const int32_t *in = (const int32_t *)inp;
728 for( size_t i = 0; i < samples; i++ )
729 *(out++) = bswap32( *(in++) );
732 static void F32IEncode( void *outp, const uint8_t *inp, unsigned samples )
734 const float *in = (const float *)inp;
737 for( size_t i = 0; i < samples; i++ )
739 union { float f; uint32_t u; char b[4]; } s;
742 s.u = bswap32( s.u );
743 memcpy( out, s.b, 4 );
748 static void F64IEncode( void *outp, const uint8_t *inp, unsigned samples )
750 const double *in = (const double *)inp;
753 for( size_t i = 0; i < samples; i++ )
755 union { double d; uint64_t u; char b[8]; } s;
758 s.u = bswap64( s.u );
759 memcpy( out, s.b, 8 );
764 static block_t *Encode( encoder_t *enc, block_t *in )
769 block_t *out = block_Alloc( in->i_nb_samples
770 * enc->fmt_out.audio.i_bytes_per_frame );
771 if( unlikely(out == NULL) )
774 out->i_flags = in->i_flags;
775 out->i_nb_samples = in->i_nb_samples;
776 out->i_dts = in->i_dts;
777 out->i_pts = in->i_pts;
778 out->i_length = in->i_length;
780 void (*encode)(void *, const uint8_t *, unsigned) = (void *)enc->p_sys;
782 encode( out->p_buffer, in->p_buffer, in->i_nb_samples
783 * enc->fmt_out.audio.i_channels );
785 assert( out->i_buffer >= in->i_buffer );
786 memcpy( out->p_buffer, in->p_buffer, in->i_buffer );
792 * Probes the PCM audio encoder.
794 static int EncoderOpen( vlc_object_t *p_this )
796 encoder_t *p_enc = (encoder_t *)p_this;
797 void (*encode)(void *, const uint8_t *, unsigned) = NULL;
799 switch( p_enc->fmt_out.i_codec )
804 p_enc->fmt_in.i_codec = VLC_CODEC_U8;
805 p_enc->fmt_out.audio.i_bitspersample = 8;
809 p_enc->fmt_in.i_codec = VLC_CODEC_S16N;
810 p_enc->fmt_out.audio.i_bitspersample = 16;
814 p_enc->fmt_in.i_codec = VLC_CODEC_S16N;
815 p_enc->fmt_out.audio.i_bitspersample = 16;
820 p_enc->fmt_in.i_codec = VLC_CODEC_S16N;
821 p_enc->fmt_out.audio.i_bitspersample = 16;
825 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
826 p_enc->fmt_out.audio.i_bitspersample = 24;
830 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
831 p_enc->fmt_out.audio.i_bitspersample = 24;
835 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
836 p_enc->fmt_out.audio.i_bitspersample = 24;
840 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
841 p_enc->fmt_out.audio.i_bitspersample = 24;
845 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
846 p_enc->fmt_out.audio.i_bitspersample = 32;
850 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
851 p_enc->fmt_out.audio.i_bitspersample = 32;
856 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
857 p_enc->fmt_out.audio.i_bitspersample = 32;
859 #ifdef WORDS_BIGENDIAN
866 p_enc->fmt_in.i_codec = VLC_CODEC_FL32;
867 p_enc->fmt_out.audio.i_bitspersample = 32;
869 #ifdef WORDS_BIGENDIAN
876 p_enc->fmt_in.i_codec = VLC_CODEC_FL64;
877 p_enc->fmt_out.audio.i_bitspersample = 64;
883 p_enc->p_sys = (void *)encode;
884 p_enc->pf_encode_audio = Encode;
885 p_enc->fmt_out.audio.i_bytes_per_frame =
886 (p_enc->fmt_out.audio.i_bitspersample / 8) *
887 p_enc->fmt_in.audio.i_channels;
888 p_enc->fmt_out.i_bitrate =
889 p_enc->fmt_in.audio.i_channels *
890 p_enc->fmt_in.audio.i_rate *
891 p_enc->fmt_out.audio.i_bitspersample;
893 msg_Dbg( p_enc, "samplerate:%dHz channels:%d bits/sample:%d",
894 p_enc->fmt_out.audio.i_rate, p_enc->fmt_out.audio.i_channels,
895 p_enc->fmt_out.audio.i_bitspersample );
899 #endif /* ENABLE_SOUT */