--- /dev/null
+/*****************************************************************************
+ * dtstospdif.c : encapsulates DTS frames into S/PDIF packets
+ *****************************************************************************
+ * Copyright (C) 2003 VideoLAN
+ * $Id: dtstospdif.c,v 1.1 2003/03/09 20:07:47 jlj Exp $
+ *
+ * Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include <stdlib.h> /* malloc(), free() */
+#include <string.h>
+
+#include <vlc/vlc.h>
+
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#include "audio_output.h"
+#include "aout_internal.h"
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int Create ( vlc_object_t * );
+static void DoWork ( aout_instance_t *, aout_filter_t *, aout_buffer_t *,
+ aout_buffer_t * );
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+vlc_module_begin();
+ set_description( _("audio filter for DTS->S/PDIF encapsulation") );
+ set_capability( "audio filter", 10 );
+ set_callbacks( Create, NULL );
+vlc_module_end();
+
+/*****************************************************************************
+ * Create:
+ *****************************************************************************/
+static int Create( vlc_object_t *p_this )
+{
+ aout_filter_t * p_filter = (aout_filter_t *)p_this;
+
+ if ( p_filter->input.i_format != VLC_FOURCC('d','t','s',' ')
+ || p_filter->output.i_format != VLC_FOURCC('s','p','d','i') )
+ {
+ return -1;
+ }
+
+ p_filter->pf_do_work = DoWork;
+ p_filter->b_in_place = 0;
+
+ return 0;
+}
+
+/*****************************************************************************
+ * DoWork: convert a buffer
+ *****************************************************************************/
+static void DoWork( aout_instance_t * p_aout, aout_filter_t * p_filter,
+ aout_buffer_t * p_in_buf, aout_buffer_t * p_out_buf )
+{
+ uint16_t i_fz = (p_in_buf->i_nb_samples / 3) * 4;
+ uint16_t i_frame, i_length = p_in_buf->i_nb_bytes / 3;
+ static const uint8_t p_sync[6] = { 0x72, 0xF8, 0x1F, 0x4E, 0x00, 0x00 };
+
+ for( i_frame = 0; i_frame < 3; i_frame++ )
+ {
+#ifndef HAVE_SWAB
+ uint16_t i;
+ byte_t * p_tmp;
+#endif
+ byte_t * p_out = p_out_buf->p_buffer + (i_frame * i_fz);
+ byte_t * p_in = p_in_buf->p_buffer + (i_frame * i_length);
+
+ /* Copy the S/PDIF headers. */
+ memcpy( p_out, p_sync, 6 );
+
+ switch( p_in_buf->i_nb_samples / 3 )
+ {
+ case 512: *(p_out + 4) = 0x0B; break;
+ case 1024: *(p_out + 4) = 0x0C; break;
+ case 2048: *(p_out + 4) = 0x0D; break;
+ }
+
+ *(p_out + 6) = (i_length * 8) & 0xff;
+ *(p_out + 7) = (i_length * 8) >> 8;
+
+#ifdef HAVE_SWAB
+ swab( p_in, p_out + 8, i_length );
+#else
+ p_tmp = p_out + 8;
+ for( i = i_length / 2 ; i-- ; )
+ {
+ p_tmp[0] = p_in[1];
+ p_tmp[1] = p_in[0];
+ p_tmp += 2; p_in += 2;
+ }
+#endif
+
+ p_filter->p_vlc->pf_memset( p_out + 8 + i_length, 0,
+ i_fz - i_length - 8 );
+ }
+
+ p_out_buf->i_nb_samples = p_in_buf->i_nb_samples;
+ p_out_buf->i_nb_bytes = p_out_buf->i_nb_samples * 4;
+}
--- /dev/null
+/*****************************************************************************
+ * dts.c: DTS basic parser
+ *****************************************************************************
+ * Copyright (C) 2003 VideoLAN
+ * $Id: dts.c,v 1.1 2003/03/09 20:07:47 jlj Exp $
+ *
+ * Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h> /* memcpy() */
+#include <fcntl.h>
+
+#include <vlc/vlc.h>
+#include <vlc/decoder.h>
+#include <vlc/aout.h>
+
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+/*****************************************************************************
+ * dec_thread_t : decoder thread descriptor
+ *****************************************************************************/
+typedef struct dec_thread_t
+{
+ /*
+ * Thread properties
+ */
+ vlc_thread_t thread_id; /* id for thread functions */
+
+ /*
+ * Input properties
+ */
+ decoder_fifo_t * p_fifo; /* stores the PES stream data */
+ bit_stream_t bit_stream;
+
+ /*
+ * Output properties
+ */
+ aout_instance_t * p_aout; /* opaque */
+ aout_input_t * p_aout_input; /* opaque */
+ audio_sample_format_t output_format;
+} dec_thread_t;
+
+/****************************************************************************
+ * Local prototypes
+ ****************************************************************************/
+static int OpenDecoder ( vlc_object_t * );
+static int RunDecoder ( decoder_fifo_t * );
+
+static void EndThread ( dec_thread_t * );
+
+static int SyncInfo ( const byte_t *, unsigned int *,
+ unsigned int *, unsigned int *,
+ unsigned int * );
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+vlc_module_begin();
+ set_description( _("DTS parser") );
+ set_capability( "decoder", 100 );
+ set_callbacks( OpenDecoder, NULL );
+vlc_module_end();
+
+/*****************************************************************************
+ * OpenDecoder: probe the decoder and return score
+ *****************************************************************************/
+static int OpenDecoder( vlc_object_t *p_this )
+{
+ decoder_fifo_t *p_fifo = (decoder_fifo_t*) p_this;
+
+ if( p_fifo->i_fourcc != VLC_FOURCC('d','t','s',' ')
+ && p_fifo->i_fourcc != VLC_FOURCC('d','t','s','b') )
+ {
+ return VLC_EGENERIC;
+ }
+
+ p_fifo->pf_run = RunDecoder;
+ return VLC_SUCCESS;
+}
+
+/****************************************************************************
+ * RunDecoder: the whole thing
+ ****************************************************************************
+ * This function is called just after the thread is launched.
+ ****************************************************************************/
+static int RunDecoder( decoder_fifo_t *p_fifo )
+{
+ dec_thread_t * p_dec;
+ audio_date_t end_date;
+
+ /* Allocate the memory needed to store the thread's structure */
+ p_dec = malloc( sizeof(dec_thread_t) );
+ if( p_dec == NULL )
+ {
+ msg_Err( p_fifo, "out of memory" );
+ DecoderError( p_fifo );
+ return -1;
+ }
+
+ /* Initialize the thread properties */
+ p_dec->p_aout = NULL;
+ p_dec->p_aout_input = NULL;
+ p_dec->p_fifo = p_fifo;
+ p_dec->output_format.i_format = VLC_FOURCC('d','t','s',' ');
+
+ aout_DateSet( &end_date, 0 );
+
+ /* Init the bitstream */
+ if( InitBitstream( &p_dec->bit_stream, p_dec->p_fifo,
+ NULL, NULL ) != VLC_SUCCESS )
+ {
+ msg_Err( p_fifo, "cannot initialize bitstream" );
+ DecoderError( p_fifo );
+ free( p_dec );
+ return -1;
+ }
+
+ /* Decoder thread's main loop */
+ while( !p_dec->p_fifo->b_die && !p_dec->p_fifo->b_error )
+ {
+ int i;
+ mtime_t pts;
+ byte_t p_header[10];
+
+ unsigned int i_rate;
+ unsigned int i_bit_rate;
+ unsigned int i_frame_size;
+ unsigned int i_frame_length;
+ unsigned int i_original_channels;
+
+ aout_buffer_t * p_buffer = NULL;
+
+ for( i = 0; i < 3; i++ )
+ {
+ RealignBits( &p_dec->bit_stream );
+ while( (ShowBits( &p_dec->bit_stream, 32 ) ) != 0x7ffe8001 &&
+ (!p_dec->p_fifo->b_die) && (!p_dec->p_fifo->b_error) )
+ {
+ RemoveBits( &p_dec->bit_stream, 8 );
+ }
+ if( p_dec->p_fifo->b_die || p_dec->p_fifo->b_error ) break;
+
+ if( i == 0 )
+ {
+ /* Set the Presentation Time Stamp */
+ NextPTS( &p_dec->bit_stream, &pts, NULL );
+ if( pts != 0 && pts != aout_DateGet( &end_date ) )
+ {
+ aout_DateSet( &end_date, pts );
+ }
+ }
+
+ /* Get DTS frame header */
+ GetChunk( &p_dec->bit_stream, p_header, 10 );
+ if( p_dec->p_fifo->b_die || p_dec->p_fifo->b_error ) break;
+
+ i_frame_size = SyncInfo( p_header, &i_original_channels, &i_rate,
+ &i_bit_rate, &i_frame_length );
+ if( !i_frame_size )
+ {
+ msg_Warn( p_dec->p_fifo, "dts_syncinfo failed" );
+ i--; continue;
+ }
+
+ if( i == 0 )
+ {
+ if( (p_dec->p_aout_input != NULL) &&
+ ( (p_dec->output_format.i_rate != i_rate)
+ || (p_dec->output_format.i_original_channels
+ != i_original_channels)
+ || (p_dec->output_format.i_bytes_per_frame
+ != i_frame_size * 3) ) )
+ {
+ /* Parameters changed - this should not happen. */
+ aout_DecDelete( p_dec->p_aout, p_dec->p_aout_input );
+ p_dec->p_aout_input = NULL;
+ }
+
+ /* Creating the audio input if not created yet. */
+ if( p_dec->p_aout_input == NULL )
+ {
+ p_dec->output_format.i_rate = i_rate;
+ p_dec->output_format.i_original_channels
+ = i_original_channels;
+ p_dec->output_format.i_physical_channels
+ = i_original_channels & AOUT_CHAN_PHYSMASK;
+ p_dec->output_format.i_bytes_per_frame = i_frame_size * 3;
+ p_dec->output_format.i_frame_length = i_frame_length * 3;
+ aout_DateInit( &end_date, i_rate );
+ p_dec->p_aout_input = aout_DecNew( p_dec->p_fifo,
+ &p_dec->p_aout,
+ &p_dec->output_format );
+
+ if( p_dec->p_aout_input == NULL )
+ {
+ p_dec->p_fifo->b_error = 1;
+ break;
+ }
+ }
+ }
+
+ if( !aout_DateGet( &end_date ) )
+ {
+ byte_t p_junk[ i_frame_size ];
+
+ /* We've just started the stream, wait for the first PTS. */
+ GetChunk( &p_dec->bit_stream, p_junk, i_frame_size - 10 );
+ i--; continue;
+ }
+
+ if( i == 0 )
+ {
+ p_buffer = aout_DecNewBuffer( p_dec->p_aout,
+ p_dec->p_aout_input,
+ i_frame_length * 3 );
+ if( p_buffer == NULL )
+ {
+ p_dec->p_fifo->b_error = 1;
+ break;
+ }
+ p_buffer->start_date = aout_DateGet( &end_date );
+ p_buffer->end_date = aout_DateIncrement( &end_date,
+ i_frame_length * 3 );
+ }
+
+ /* Get the whole frame. */
+ memcpy( p_buffer->p_buffer + (i * i_frame_size), p_header, 10 );
+ GetChunk( &p_dec->bit_stream,
+ p_buffer->p_buffer + (i * i_frame_size) + 10,
+ i_frame_size - 10 );
+ if( p_dec->p_fifo->b_die ) break;
+ }
+
+ if( p_dec->p_fifo->b_die || p_dec->p_fifo->b_error )
+ {
+ if( p_buffer != NULL )
+ {
+ aout_DecDeleteBuffer( p_dec->p_aout, p_dec->p_aout_input,
+ p_buffer );
+ }
+
+ break;
+ }
+
+ /* Send the buffer to the aout core. */
+ aout_DecPlay( p_dec->p_aout, p_dec->p_aout_input, p_buffer );
+ }
+
+ if( p_dec->p_fifo->b_error )
+ {
+ DecoderError( p_dec->p_fifo );
+ }
+
+ EndThread( p_dec );
+
+ return 0;
+}
+
+/*****************************************************************************
+ * EndThread : thread destruction
+ *****************************************************************************/
+static void EndThread( dec_thread_t * p_dec )
+{
+ if ( p_dec->p_aout_input != NULL )
+ {
+ aout_DecDelete( p_dec->p_aout, p_dec->p_aout_input );
+ }
+
+ CloseBitstream( &p_dec->bit_stream );
+ free( p_dec );
+}
+
+/*****************************************************************************
+ * SyncInfo: parse DTS sync info
+ *****************************************************************************/
+static int SyncInfo( const byte_t * p_buf, unsigned int * pi_channels,
+ unsigned int * pi_sample_rate,
+ unsigned int * pi_bit_rate,
+ unsigned int * pi_frame_length )
+{
+ unsigned int i_bit_rate;
+ unsigned int i_audio_mode;
+ unsigned int i_sample_rate;
+ unsigned int i_frame_size;
+ unsigned int i_frame_length;
+
+ static const unsigned int ppi_dts_samplerate[] =
+ {
+ 0, 8000, 16000, 32000, 64000, 128000,
+ 11025, 22050, 44010, 88020, 176400,
+ 12000, 24000, 48000, 96000, 192000
+ };
+
+ static const unsigned int ppi_dts_bitrate[] =
+ {
+ 32000, 56000, 64000, 96000, 112000, 128000,
+ 192000, 224000, 256000, 320000, 384000,
+ 448000, 512000, 576000, 640000, 768000,
+ 896000, 1024000, 1152000, 1280000, 1344000,
+ 1408000, 1411200, 1472000, 1536000, 1920000,
+ 2048000, 3072000, 3840000, 4096000, 0, 0
+ };
+
+ if( ((uint32_t*)p_buf)[0] != 0x7ffe8001 )
+ {
+ return( 0 );
+ }
+
+ i_frame_length = (p_buf[4] & 0x01) << 6 | (p_buf[5] >> 2);
+ i_frame_size = (p_buf[5] & 0x03) << 12 | (p_buf[6] << 4) |
+ (p_buf[7] >> 4);
+
+ i_audio_mode = (p_buf[7] & 0x0f) << 2 | (p_buf[8] >> 6);
+ i_sample_rate = (p_buf[8] >> 2) & 0x0f;
+ i_bit_rate = (p_buf[8] & 0x03) << 3 | ((p_buf[9] >> 5) & 0x07);
+
+ switch( i_audio_mode )
+ {
+ case 0x0:
+ /* Mono */
+ *pi_channels = AOUT_CHAN_CENTER;
+ break;
+ case 0x1:
+ /* Dual-mono = stereo + dual-mono */
+ *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
+ AOUT_CHAN_DUALMONO;
+ break;
+ case 0x2:
+ case 0x3:
+ case 0x4:
+ /* Stereo */
+ *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
+ break;
+ case 0x5:
+ /* 3F */
+ *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER;
+ break;
+ case 0x6:
+ /* 2F/LFE */
+ *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_LFE;
+ break;
+ case 0x7:
+ /* 3F/LFE */
+ *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
+ AOUT_CHAN_CENTER | AOUT_CHAN_LFE;
+ break;
+ case 0x8:
+ /* 2F2R */
+ *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
+ AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
+ break;
+ case 0x9:
+ /* 3F2R */
+ *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
+ AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
+ AOUT_CHAN_REARRIGHT;
+ break;
+ case 0xA:
+ case 0xB:
+ /* 2F2M2R */
+ *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
+ AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT |
+ AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
+ break;
+ case 0xC:
+ /* 3F2M2R */
+ *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
+ AOUT_CHAN_CENTER | AOUT_CHAN_MIDDLELEFT |
+ AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_REARLEFT |
+ AOUT_CHAN_REARRIGHT;
+ break;
+ case 0xD:
+ case 0xE:
+ /* 3F2M2R/LFE */
+ *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
+ AOUT_CHAN_CENTER | AOUT_CHAN_MIDDLELEFT |
+ AOUT_CHAN_MIDDLERIGHT | AOUT_CHAN_REARLEFT |
+ AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
+ break;
+
+ default:
+ return( 0 );
+ }
+
+ if( i_sample_rate >= sizeof( ppi_dts_samplerate ) /
+ sizeof( ppi_dts_samplerate[0] ) )
+ {
+ return( 0 );
+ }
+
+ *pi_sample_rate = ppi_dts_samplerate[ i_sample_rate ];
+
+ if( i_bit_rate >= sizeof( ppi_dts_bitrate ) /
+ sizeof( ppi_dts_bitrate[0] ) )
+ {
+ return( 0 );
+ }
+
+ *pi_bit_rate = ppi_dts_bitrate[ i_bit_rate ];
+
+ *pi_frame_length = (i_frame_length + 1) * 32;
+
+ return( i_frame_size + 1 );
+}
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