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;
300 if( pp_block == NULL )
303 block_t *p_block = *pp_block;
304 if( p_block == NULL )
308 if( p_block->i_pts > VLC_TS_INVALID &&
309 p_block->i_pts != date_Get( &p_sys->end_date ) )
311 date_Set( &p_sys->end_date, p_block->i_pts );
313 else if( !date_Get( &p_sys->end_date ) )
314 /* We've just started the stream, wait for the first PTS. */
317 unsigned samples = (8 * p_block->i_buffer) / p_sys->framebits;
321 if( p_sys->decode != NULL )
323 block_t *p_out = decoder_NewAudioBuffer( p_dec, samples );
327 p_sys->decode( p_out->p_buffer, p_block->p_buffer,
328 samples * p_dec->fmt_in.audio.i_channels );
329 block_Release( p_block );
334 decoder_UpdateAudioFormat( p_dec );
335 p_block->i_nb_samples = samples;
336 p_block->i_buffer = samples * (p_sys->framebits / 8);
339 p_block->i_pts = date_Get( &p_sys->end_date );
340 p_block->i_length = date_Increment( &p_sys->end_date, samples )
344 block_Release( p_block );
348 static void S8Decode( void *outp, const uint8_t *in, unsigned samples )
352 for( size_t i = 0; i < samples; i++ )
353 out[i] = in[i] ^ 0x80;
356 static void U16BDecode( void *outp, const uint8_t *in, unsigned samples )
358 uint16_t *out = outp;
360 for( size_t i = 0; i < samples; i++ )
362 *(out++) = GetWBE( in ) - 0x8000;
367 static void U16LDecode( void *outp, const uint8_t *in, unsigned samples )
369 uint16_t *out = outp;
371 for( size_t i = 0; i < samples; i++ )
373 *(out++) = GetWLE( in ) - 0x8000;
378 static void S16IDecode( void *out, const uint8_t *in, unsigned samples )
380 swab( in, out, samples * 2 );
383 static void S20BDecode( void *outp, const uint8_t *in, unsigned samples )
387 while( samples >= 2 )
389 uint32_t dw = U32_AT(in);
391 *(out++) = dw & ~0xFFF;
392 *(out++) = (dw << 20) | (*in << 12);
397 /* No U32_AT() for the last odd sample: avoid off-by-one overflow! */
399 *(out++) = (U16_AT(in) << 16) | ((in[2] & 0xF0) << 8);
402 static void U24BDecode( void *outp, const uint8_t *in, unsigned samples )
404 uint32_t *out = outp;
406 for( size_t i = 0; i < samples; i++ )
408 uint32_t s = ((in[0] << 24) | (in[1] << 16) | (in[2] << 8)) - 0x80000000;
414 static void U24LDecode( void *outp, const uint8_t *in, unsigned samples )
416 uint32_t *out = outp;
418 for( size_t i = 0; i < samples; i++ )
420 uint32_t s = ((in[2] << 24) | (in[1] << 16) | (in[0] << 8)) - 0x80000000;
426 static void S24BDecode( void *outp, const uint8_t *in, unsigned samples )
428 uint32_t *out = outp;
430 for( size_t i = 0; i < samples; i++ )
432 uint32_t s = ((in[0] << 24) | (in[1] << 16) | (in[2] << 8));
438 static void S24LDecode( void *outp, const uint8_t *in, unsigned samples )
440 uint32_t *out = outp;
442 for( size_t i = 0; i < samples; i++ )
444 uint32_t s = ((in[2] << 24) | (in[1] << 16) | (in[0] << 8));
450 static void S24B32Decode( void *outp, const uint8_t *in, unsigned samples )
452 uint32_t *out = outp;
454 for( size_t i = 0; i < samples; i++ )
456 *(out++) = GetDWBE( in ) << 8;
461 static void S24L32Decode( void *outp, const uint8_t *in, unsigned samples )
463 uint32_t *out = outp;
465 for( size_t i = 0; i < samples; i++ )
467 *(out++) = GetDWLE( in ) << 8;
472 static void U32BDecode( void *outp, const uint8_t *in, unsigned samples )
474 uint32_t *out = outp;
476 for( size_t i = 0; i < samples; i++ )
478 *(out++) = GetDWBE( in ) - 0x80000000;
483 static void U32LDecode( void *outp, const uint8_t *in, unsigned samples )
485 uint32_t *out = outp;
487 for( size_t i = 0; i < samples; i++ )
489 *(out++) = GetDWLE( in ) - 0x80000000;
494 static void S32IDecode( void *outp, const uint8_t *in, unsigned samples )
498 for( size_t i = 0; i < samples; i++ )
500 #ifdef WORDS_BIGENDIAN
501 *(out++) = GetDWLE( in );
503 *(out++) = GetDWBE( in );
509 static void F32IDecode( void *outp, const uint8_t *in, unsigned samples )
513 for( size_t i = 0; i < samples; i++ )
515 union { float f; uint32_t u; } s;
517 #ifdef WORDS_BIGENDIAN
527 static void F64IDecode( void *outp, const uint8_t *in, unsigned samples )
531 for( size_t i = 0; i < samples; i++ )
533 union { double d; uint64_t u; } s;
535 #ifdef WORDS_BIGENDIAN
545 static int16_t dat12tos16( uint16_t y )
547 static const uint16_t diff[16] = {
548 0x0000, 0x0000, 0x0100, 0x0200, 0x0300, 0x0400, 0x0500, 0x0600,
549 0x0A00, 0x0B00, 0x0C00, 0x0D00, 0x0E00, 0x0F00, 0x1000, 0x1000 };
550 static const uint8_t shift[16] = {
551 0, 0, 1, 2, 3, 4, 5, 6, 6, 5, 4, 3, 2, 1, 0, 0 };
554 return (y - diff[d]) << shift[d];
557 static void DAT12Decode( void *outp, const uint8_t *in, unsigned samples )
561 while( samples >= 2 )
563 *(out++) = dat12tos16(U16_AT(in) >> 4);
564 *(out++) = dat12tos16(U16_AT(in + 1) & ~0xF000);
570 *(out++) = dat12tos16(U16_AT(in) >> 4);
573 /*****************************************************************************
574 * DecoderClose: decoder destruction
575 *****************************************************************************/
576 static void DecoderClose( vlc_object_t *p_this )
578 decoder_t *p_dec = (decoder_t *)p_this;
580 free( p_dec->p_sys );
584 /* NOTE: Output buffers are always aligned since they are allocated by the araw plugin.
585 * Contrary to the decoder, the encoder can also assume that input buffers are aligned,
586 * since decoded audio blocks must always be aligned. */
588 static void U16IEncode( void *outp, const uint8_t *inp, unsigned samples )
590 const uint16_t *in = (const uint16_t *)inp;
591 uint16_t *out = outp;
593 for( size_t i = 0; i < samples; i++ )
594 *(out++) = bswap16( *(in++) + 0x8000 );
597 static void U16NEncode( void *outp, const uint8_t *inp, unsigned samples )
599 const uint16_t *in = (const uint16_t *)inp;
600 uint16_t *out = outp;
602 for( size_t i = 0; i < samples; i++ )
603 *(out++) = *(in++) + 0x8000;
606 static void U24BEncode( void *outp, const uint8_t *inp, unsigned samples )
608 const uint32_t *in = (const uint32_t *)inp;
611 for( size_t i = 0; i < samples; i++ )
613 uint32_t s = *(in++);
614 *(out++) = (s >> 24) + 0x80;
615 *(out++) = (s >> 16);
620 static void U24LEncode( void *outp, const uint8_t *inp, unsigned samples )
622 const uint32_t *in = (const uint32_t *)inp;
625 for( size_t i = 0; i < samples; i++ )
627 uint32_t s = *(in++);
629 *(out++) = (s >> 16);
630 *(out++) = (s >> 24) + 0x80;
634 static void S24BEncode( void *outp, const uint8_t *inp, unsigned samples )
636 const uint32_t *in = (const uint32_t *)inp;
639 for( size_t i = 0; i < samples; i++ )
641 uint32_t s = *(in++);
642 *(out++) = (s >> 24);
643 *(out++) = (s >> 16);
648 static void S24LEncode( void *outp, const uint8_t *inp, unsigned samples )
650 const uint32_t *in = (const uint32_t *)inp;
653 for( size_t i = 0; i < samples; i++ )
655 uint32_t s = *(in++);
657 *(out++) = (s >> 16);
658 *(out++) = (s >> 24);
662 static void U32IEncode( void *outp, const uint8_t *inp, unsigned samples )
664 const uint32_t *in = (const uint32_t *)inp;
665 uint32_t *out = outp;
667 for( size_t i = 0; i < samples; i++ )
668 *(out++) = bswap32( *(in++) + 0x80000000 );
671 static void U32NEncode( void *outp, const uint8_t *inp, unsigned samples )
673 const uint32_t *in = (const uint32_t *)inp;
674 uint32_t *out = outp;
676 for( size_t i = 0; i < samples; i++ )
677 *(out++) = *(in++) + 0x80000000;
680 static void S32IEncode( void *outp, const uint8_t *inp, unsigned samples )
682 const int32_t *in = (const int32_t *)inp;
685 for( size_t i = 0; i < samples; i++ )
686 *(out++) = bswap32( *(in++) );
689 static void F32IEncode( void *outp, const uint8_t *inp, unsigned samples )
691 const float *in = (const float *)inp;
694 for( size_t i = 0; i < samples; i++ )
696 union { float f; uint32_t u; char b[4]; } s;
699 s.u = bswap32( s.u );
700 memcpy( out, s.b, 4 );
705 static void F64IEncode( void *outp, const uint8_t *inp, unsigned samples )
707 const double *in = (const double *)inp;
710 for( size_t i = 0; i < samples; i++ )
712 union { double d; uint64_t u; char b[8]; } s;
715 s.u = bswap64( s.u );
716 memcpy( out, s.b, 8 );
721 static block_t *Encode( encoder_t *enc, block_t *in )
726 block_t *out = block_Alloc( in->i_nb_samples
727 * enc->fmt_out.audio.i_bytes_per_frame );
728 if( unlikely(out == NULL) )
731 out->i_flags = in->i_flags;
732 out->i_nb_samples = in->i_nb_samples;
733 out->i_dts = in->i_dts;
734 out->i_pts = in->i_pts;
735 out->i_length = in->i_length;
736 out->i_nb_samples = in->i_nb_samples;
738 void (*encode)(void *, const uint8_t *, unsigned) = (void *)enc->p_sys;
740 encode( out->p_buffer, in->p_buffer, in->i_nb_samples
741 * enc->fmt_out.audio.i_channels );
743 memcpy( out->p_buffer, in->p_buffer, in->i_buffer );
748 * Probes the PCM audio encoder.
750 static int EncoderOpen( vlc_object_t *p_this )
752 encoder_t *p_enc = (encoder_t *)p_this;
753 void (*encode)(void *, const uint8_t *, unsigned) = NULL;
755 switch( p_enc->fmt_out.i_codec )
760 p_enc->fmt_in.i_codec = VLC_CODEC_U8;
761 p_enc->fmt_out.audio.i_bitspersample = 8;
765 p_enc->fmt_in.i_codec = VLC_CODEC_S16N;
766 p_enc->fmt_out.audio.i_bitspersample = 16;
770 p_enc->fmt_in.i_codec = VLC_CODEC_S16N;
771 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;
781 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
782 p_enc->fmt_out.audio.i_bitspersample = 24;
786 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
787 p_enc->fmt_out.audio.i_bitspersample = 24;
791 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
792 p_enc->fmt_out.audio.i_bitspersample = 24;
796 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
797 p_enc->fmt_out.audio.i_bitspersample = 24;
801 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
802 p_enc->fmt_out.audio.i_bitspersample = 32;
806 p_enc->fmt_in.i_codec = VLC_CODEC_S32N;
807 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;
815 #ifdef WORDS_BIGENDIAN
822 p_enc->fmt_in.i_codec = VLC_CODEC_FL32;
823 p_enc->fmt_out.audio.i_bitspersample = 32;
825 #ifdef WORDS_BIGENDIAN
832 p_enc->fmt_in.i_codec = VLC_CODEC_FL64;
833 p_enc->fmt_out.audio.i_bitspersample = 64;
839 p_enc->p_sys = (void *)encode;
840 p_enc->pf_encode_audio = Encode;
841 p_enc->fmt_out.audio.i_bytes_per_frame =
842 (p_enc->fmt_out.audio.i_bitspersample / 8) *
843 p_enc->fmt_in.audio.i_channels;
844 p_enc->fmt_out.i_bitrate =
845 p_enc->fmt_in.audio.i_channels *
846 p_enc->fmt_in.audio.i_rate *
847 p_enc->fmt_out.audio.i_bitspersample;
849 msg_Dbg( p_enc, "samplerate:%dHz channels:%d bits/sample:%d",
850 p_enc->fmt_out.audio.i_rate, p_enc->fmt_out.audio.i_channels,
851 p_enc->fmt_out.audio.i_bitspersample );
855 #endif /* ENABLE_SOUT */