/*****************************************************************************
- * dts.c: DTS basic parser
+ * dts.c: parse DTS audio sync info and packetize the stream
*****************************************************************************
- * Copyright (C) 2003 VideoLAN
- * $Id: dts.c,v 1.2 2003/03/10 08:23:45 jlj Exp $
+ * Copyright (C) 2003-2005 the VideoLAN team
+ * $Id$
*
* Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
+ * Gildas Bazin <gbazin@netcourrier.com>
*
* 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
*
* 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.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h> /* memcpy() */
-#include <fcntl.h>
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
-#include <vlc/vlc.h>
-#include <vlc/decoder.h>
-#include <vlc/aout.h>
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_codec.h>
+#include <vlc_aout.h>
+#include <vlc_block_helper.h>
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#define DTS_HEADER_SIZE 14
/*****************************************************************************
- * dec_thread_t : decoder thread descriptor
+ * decoder_sys_t : decoder descriptor
*****************************************************************************/
-typedef struct dec_thread_t
+struct decoder_sys_t
{
- /*
- * Thread properties
- */
- vlc_thread_t thread_id; /* id for thread functions */
+ /* Module mode */
+ bool b_packetizer;
/*
* Input properties
*/
- decoder_fifo_t * p_fifo; /* stores the PES stream data */
- bit_stream_t bit_stream;
+ int i_state;
+
+ block_bytestream_t bytestream;
/*
- * Output properties
+ * Common properties
*/
- aout_instance_t * p_aout; /* opaque */
- aout_input_t * p_aout_input; /* opaque */
- audio_sample_format_t output_format;
-} dec_thread_t;
+ audio_date_t end_date;
+
+ mtime_t i_pts;
+
+ unsigned int i_bit_rate;
+ unsigned int i_frame_size;
+ unsigned int i_frame_length;
+ unsigned int i_rate;
+ unsigned int i_channels;
+ unsigned int i_channels_conf;
+};
+
+enum {
+
+ STATE_NOSYNC,
+ STATE_SYNC,
+ STATE_HEADER,
+ STATE_NEXT_SYNC,
+ STATE_GET_DATA,
+ STATE_SEND_DATA
+};
/****************************************************************************
* Local prototypes
****************************************************************************/
-static int OpenDecoder ( vlc_object_t * );
-static int RunDecoder ( decoder_fifo_t * );
+static int OpenDecoder ( vlc_object_t * );
+static int OpenPacketizer( vlc_object_t * );
+static void CloseDecoder ( vlc_object_t * );
+static void *DecodeBlock ( decoder_t *, block_t ** );
-static void EndThread ( dec_thread_t * );
+static inline int SyncCode( const uint8_t * );
+static int SyncInfo ( const uint8_t *, unsigned int *, unsigned int *,
+ unsigned int *, unsigned int *, unsigned int * );
-static int SyncInfo ( const byte_t *, unsigned int *,
- unsigned int *, unsigned int *,
- unsigned int * );
+static uint8_t *GetOutBuffer ( decoder_t *, void ** );
+static aout_buffer_t *GetAoutBuffer( decoder_t * );
+static block_t *GetSoutBuffer( decoder_t * );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin();
- set_description( _("DTS parser") );
+ set_description( N_("DTS parser") );
set_capability( "decoder", 100 );
- set_callbacks( OpenDecoder, NULL );
+ set_callbacks( OpenDecoder, CloseDecoder );
+
+ add_submodule();
+ set_description( N_("DTS audio packetizer") );
+ set_capability( "packetizer", 10 );
+ set_callbacks( OpenPacketizer, CloseDecoder );
vlc_module_end();
/*****************************************************************************
*****************************************************************************/
static int OpenDecoder( vlc_object_t *p_this )
{
- decoder_fifo_t *p_fifo = (decoder_fifo_t*) p_this;
+ decoder_t *p_dec = (decoder_t*)p_this;
+ decoder_sys_t *p_sys;
- if( p_fifo->i_fourcc != VLC_FOURCC('d','t','s',' ')
- && p_fifo->i_fourcc != VLC_FOURCC('d','t','s','b') )
+ if( p_dec->fmt_in.i_codec != VLC_FOURCC('d','t','s',' ')
+ && p_dec->fmt_in.i_codec != VLC_FOURCC('d','t','s','b') )
{
return VLC_EGENERIC;
}
- p_fifo->pf_run = RunDecoder;
+ /* Allocate the memory needed to store the decoder's structure */
+ if( ( p_dec->p_sys = p_sys =
+ (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
+ return VLC_ENOMEM;
+
+ /* Misc init */
+ p_sys->b_packetizer = false;
+ p_sys->i_state = STATE_NOSYNC;
+ aout_DateSet( &p_sys->end_date, 0 );
+
+ p_sys->bytestream = block_BytestreamInit();
+
+ /* Set output properties */
+ p_dec->fmt_out.i_cat = AUDIO_ES;
+ p_dec->fmt_out.i_codec = VLC_FOURCC('d','t','s',' ');
+ p_dec->fmt_out.audio.i_rate = 0; /* So end_date gets initialized */
+
+ /* Set callback */
+ p_dec->pf_decode_audio = (aout_buffer_t *(*)(decoder_t *, block_t **))
+ DecodeBlock;
+ p_dec->pf_packetize = (block_t *(*)(decoder_t *, block_t **))
+ DecodeBlock;
+
return VLC_SUCCESS;
}
+static int OpenPacketizer( vlc_object_t *p_this )
+{
+ decoder_t *p_dec = (decoder_t*)p_this;
+
+ int i_ret = OpenDecoder( p_this );
+
+ if( i_ret == VLC_SUCCESS ) p_dec->p_sys->b_packetizer = true;
+
+ return i_ret;
+}
+
/****************************************************************************
- * RunDecoder: the whole thing
+ * DecodeBlock: the whole thing
****************************************************************************
* This function is called just after the thread is launched.
****************************************************************************/
-static int RunDecoder( decoder_fifo_t *p_fifo )
+static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
{
- 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',' ');
+ decoder_sys_t *p_sys = p_dec->p_sys;
+ uint8_t p_header[DTS_HEADER_SIZE];
+ uint8_t *p_buf;
+ void *p_out_buffer;
- aout_DateSet( &end_date, 0 );
+ if( !pp_block || !*pp_block ) return NULL;
- /* Init the bitstream */
- if( InitBitstream( &p_dec->bit_stream, p_dec->p_fifo,
- NULL, NULL ) != VLC_SUCCESS )
+ if( (*pp_block)->i_flags&(BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
{
- msg_Err( p_fifo, "cannot initialize bitstream" );
- DecoderError( p_fifo );
- free( p_dec );
- return -1;
+ if( (*pp_block)->i_flags&BLOCK_FLAG_CORRUPTED )
+ {
+ p_sys->i_state = STATE_NOSYNC;
+ block_BytestreamFlush( &p_sys->bytestream );
+ }
+// aout_DateSet( &p_sys->end_date, 0 );
+ block_Release( *pp_block );
+ return NULL;
}
- /* Decoder thread's main loop */
- while( !p_dec->p_fifo->b_die && !p_dec->p_fifo->b_error )
+ if( !aout_DateGet( &p_sys->end_date ) && !(*pp_block)->i_pts )
{
- 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;
+ /* We've just started the stream, wait for the first PTS. */
+ block_Release( *pp_block );
+ return NULL;
+ }
- aout_buffer_t * p_buffer = NULL;
+ block_BytestreamPush( &p_sys->bytestream, *pp_block );
- for( i = 0; i < 3; i++ )
+ while( 1 )
+ {
+ switch( p_sys->i_state )
{
- 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) )
+ case STATE_NOSYNC:
+ /* Look for sync code - should be 0x7ffe8001 */
+ while( block_PeekBytes( &p_sys->bytestream, p_header, 6 )
+ == VLC_SUCCESS )
{
- 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 ) )
+ if( SyncCode( p_header ) == VLC_SUCCESS )
{
- aout_DateSet( &end_date, pts );
+ p_sys->i_state = STATE_SYNC;
+ break;
}
+ block_SkipByte( &p_sys->bytestream );
}
+ if( p_sys->i_state != STATE_SYNC )
+ {
+ block_BytestreamFlush( &p_sys->bytestream );
- /* 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;
+ /* Need more data */
+ return NULL;
+ }
- i_frame_size = SyncInfo( p_header, &i_original_channels, &i_rate,
- &i_bit_rate, &i_frame_length );
- if( !i_frame_size )
+ case STATE_SYNC:
+ /* New frame, set the Presentation Time Stamp */
+ p_sys->i_pts = p_sys->bytestream.p_block->i_pts;
+ if( p_sys->i_pts != 0 &&
+ p_sys->i_pts != aout_DateGet( &p_sys->end_date ) )
{
- msg_Warn( p_dec->p_fifo, "dts_syncinfo failed" );
- i--; continue;
+ aout_DateSet( &p_sys->end_date, p_sys->i_pts );
}
+ p_sys->i_state = STATE_HEADER;
- if( i == 0 )
+ case STATE_HEADER:
+ /* Get DTS frame header (DTS_HEADER_SIZE bytes) */
+ if( block_PeekBytes( &p_sys->bytestream, p_header,
+ DTS_HEADER_SIZE ) != VLC_SUCCESS )
{
- 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;
- }
- }
+ /* Need more data */
+ return NULL;
}
- if( !aout_DateGet( &end_date ) )
+ /* Check if frame is valid and get frame info */
+ p_sys->i_frame_size = SyncInfo( p_header,
+ &p_sys->i_channels,
+ &p_sys->i_channels_conf,
+ &p_sys->i_rate,
+ &p_sys->i_bit_rate,
+ &p_sys->i_frame_length );
+ if( !p_sys->i_frame_size )
{
- byte_t p_junk[ i_frame_size ];
+ msg_Dbg( p_dec, "emulated sync word" );
+ block_SkipByte( &p_sys->bytestream );
+ p_sys->i_state = STATE_NOSYNC;
+ break;
+ }
+ p_sys->i_state = STATE_NEXT_SYNC;
+
+ case STATE_NEXT_SYNC:
+ /* TODO: If pp_block == NULL, flush the buffer without checking the
+ * next sync word */
- /* We've just started the stream, wait for the first PTS. */
- GetChunk( &p_dec->bit_stream, p_junk, i_frame_size - 10 );
- i--; continue;
+ /* Check if next expected frame contains the sync word */
+ if( block_PeekOffsetBytes( &p_sys->bytestream,
+ p_sys->i_frame_size, p_header, 6 )
+ != VLC_SUCCESS )
+ {
+ /* Need more data */
+ return NULL;
}
- if( i == 0 )
+ if( SyncCode( p_header ) != VLC_SUCCESS )
{
- 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 );
+ msg_Dbg( p_dec, "emulated sync word "
+ "(no sync on following frame): %2.2x%2.2x%2.2x%2.2x",
+ (int)p_header[0], (int)p_header[1],
+ (int)p_header[2], (int)p_header[3] );
+ p_sys->i_state = STATE_NOSYNC;
+ block_SkipByte( &p_sys->bytestream );
+ break;
}
+ p_sys->i_state = STATE_SEND_DATA;
+ break;
- /* 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;
- }
+ case STATE_GET_DATA:
+ /* Make sure we have enough data.
+ * (Not useful if we went through NEXT_SYNC) */
+ if( block_WaitBytes( &p_sys->bytestream,
+ p_sys->i_frame_size ) != VLC_SUCCESS )
+ {
+ /* Need more data */
+ return NULL;
+ }
+ p_sys->i_state = STATE_SEND_DATA;
- if( p_dec->p_fifo->b_die || p_dec->p_fifo->b_error )
- {
- if( p_buffer != NULL )
+ case STATE_SEND_DATA:
+ if( !(p_buf = GetOutBuffer( p_dec, &p_out_buffer )) )
{
- aout_DecDeleteBuffer( p_dec->p_aout, p_dec->p_aout_input,
- p_buffer );
+ //p_dec->b_error = true;
+ return NULL;
}
- break;
+ /* Copy the whole frame into the buffer. When we reach this point
+ * we already know we have enough data available. */
+ block_GetBytes( &p_sys->bytestream, p_buf, p_sys->i_frame_size );
+
+ /* Make sure we don't reuse the same pts twice */
+ if( p_sys->i_pts == p_sys->bytestream.p_block->i_pts )
+ p_sys->i_pts = p_sys->bytestream.p_block->i_pts = 0;
+
+ p_sys->i_state = STATE_NOSYNC;
+
+ /* So p_block doesn't get re-added several times */
+ *pp_block = block_BytestreamPop( &p_sys->bytestream );
+
+ return p_out_buffer;
}
+ }
+
+ return NULL;
+}
+
+/*****************************************************************************
+ * CloseDecoder: clean up the decoder
+ *****************************************************************************/
+static void CloseDecoder( vlc_object_t *p_this )
+{
+ decoder_t *p_dec = (decoder_t*)p_this;
+ decoder_sys_t *p_sys = p_dec->p_sys;
+
+ block_BytestreamRelease( &p_sys->bytestream );
- /* Send the buffer to the aout core. */
- aout_DecPlay( p_dec->p_aout, p_dec->p_aout_input, p_buffer );
+ free( p_sys );
+}
+
+/*****************************************************************************
+ * GetOutBuffer:
+ *****************************************************************************/
+static uint8_t *GetOutBuffer( decoder_t *p_dec, void **pp_out_buffer )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
+ uint8_t *p_buf;
+
+ if( p_dec->fmt_out.audio.i_rate != p_sys->i_rate )
+ {
+ msg_Info( p_dec, "DTS channels:%d samplerate:%d bitrate:%d",
+ p_sys->i_channels, p_sys->i_rate, p_sys->i_bit_rate );
+
+ aout_DateInit( &p_sys->end_date, p_sys->i_rate );
+ aout_DateSet( &p_sys->end_date, p_sys->i_pts );
}
- if( p_dec->p_fifo->b_error )
+ p_dec->fmt_out.audio.i_rate = p_sys->i_rate;
+ p_dec->fmt_out.audio.i_channels = p_sys->i_channels;
+ /* Hack for DTS S/PDIF filter which needs to pad the DTS frames */
+ p_dec->fmt_out.audio.i_bytes_per_frame =
+ __MAX( p_sys->i_frame_size, p_sys->i_frame_length * 4 );
+ p_dec->fmt_out.audio.i_frame_length = p_sys->i_frame_length;
+
+ p_dec->fmt_out.audio.i_original_channels = p_sys->i_channels_conf;
+ p_dec->fmt_out.audio.i_physical_channels =
+ p_sys->i_channels_conf & AOUT_CHAN_PHYSMASK;
+
+ p_dec->fmt_out.i_bitrate = p_sys->i_bit_rate;
+
+ if( p_sys->b_packetizer )
{
- DecoderError( p_dec->p_fifo );
+ block_t *p_sout_buffer = GetSoutBuffer( p_dec );
+ p_buf = p_sout_buffer ? p_sout_buffer->p_buffer : NULL;
+ *pp_out_buffer = p_sout_buffer;
}
+ else
+ {
+ aout_buffer_t *p_aout_buffer = GetAoutBuffer( p_dec );
+ p_buf = p_aout_buffer ? p_aout_buffer->p_buffer : NULL;
+ *pp_out_buffer = p_aout_buffer;
+ }
+
+ return p_buf;
+}
+
+/*****************************************************************************
+ * GetAoutBuffer:
+ *****************************************************************************/
+static aout_buffer_t *GetAoutBuffer( decoder_t *p_dec )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
+ aout_buffer_t *p_buf;
- EndThread( p_dec );
+ /* Hack for DTS S/PDIF filter which needs to send 3 frames at a time
+ * (plus a few header bytes) */
+ p_buf = p_dec->pf_aout_buffer_new( p_dec, p_sys->i_frame_length * 4 );
+ if( p_buf == NULL ) return NULL;
+ p_buf->i_nb_samples = p_sys->i_frame_length;
+ p_buf->i_nb_bytes = p_sys->i_frame_size;
- return 0;
+ p_buf->start_date = aout_DateGet( &p_sys->end_date );
+ p_buf->end_date =
+ aout_DateIncrement( &p_sys->end_date, p_sys->i_frame_length );
+
+ return p_buf;
}
/*****************************************************************************
- * EndThread : thread destruction
+ * GetSoutBuffer:
*****************************************************************************/
-static void EndThread( dec_thread_t * p_dec )
+static block_t *GetSoutBuffer( decoder_t *p_dec )
{
- if ( p_dec->p_aout_input != NULL )
- {
- aout_DecDelete( p_dec->p_aout, p_dec->p_aout_input );
- }
+ decoder_sys_t *p_sys = p_dec->p_sys;
+ block_t *p_block;
+
+ p_block = block_New( p_dec, p_sys->i_frame_size );
+ if( p_block == NULL ) return NULL;
+
+ p_block->i_pts = p_block->i_dts = aout_DateGet( &p_sys->end_date );
- CloseBitstream( &p_dec->bit_stream );
- free( p_dec );
+ p_block->i_length = aout_DateIncrement( &p_sys->end_date,
+ p_sys->i_frame_length ) - p_block->i_pts;
+
+ return p_block;
}
/*****************************************************************************
* 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 )
+static const unsigned int ppi_dts_samplerate[] =
+{
+ 0, 8000, 16000, 32000, 0, 0, 11025, 22050, 44100, 0, 0,
+ 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, 1/*open*/, 2/*variable*/, 3/*lossless*/
+};
+
+static int SyncInfo16be( const uint8_t *p_buf,
+ unsigned int *pi_audio_mode,
+ 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;
+ unsigned int i_lfe;
+
+ *pi_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);
+
+ *pi_audio_mode = (p_buf[7] & 0x0f) << 2 | (p_buf[8] >> 6);
+ *pi_sample_rate = (p_buf[8] >> 2) & 0x0f;
+ *pi_bit_rate = (p_buf[8] & 0x03) << 3 | ((p_buf[9] >> 5) & 0x07);
+
+ i_lfe = (p_buf[10] >> 1) & 0x03;
+ if( i_lfe ) *pi_audio_mode |= 0x10000;
+
+ return i_frame_size + 1;
+}
- static const unsigned int ppi_dts_samplerate[] =
+static void BufLeToBe( uint8_t *p_out, const uint8_t *p_in, int i_in )
+{
+ int i;
+
+ for( i = 0; i < i_in/2; i++ )
{
- 0, 8000, 16000, 32000, 64000, 128000,
- 11025, 22050, 44010, 88020, 176400,
- 12000, 24000, 48000, 96000, 192000
- };
+ p_out[i*2] = p_in[i*2+1];
+ p_out[i*2+1] = p_in[i*2];
+ }
+}
+
+static int Buf14To16( uint8_t *p_out, const uint8_t *p_in, int i_in, int i_le )
+{
+ unsigned char tmp, cur = 0;
+ int bits_in, bits_out = 0;
+ int i, i_out = 0;
+
+ for( i = 0; i < i_in; i++ )
+ {
+ if( i%2 )
+ {
+ tmp = p_in[i-i_le];
+ bits_in = 8;
+ }
+ else
+ {
+ tmp = p_in[i+i_le] & 0x3F;
+ bits_in = 8 - 2;
+ }
+
+ if( bits_out < 8 )
+ {
+ int need = __MIN( 8 - bits_out, bits_in );
+ cur <<= need;
+ cur |= ( tmp >> (bits_in - need) );
+ tmp <<= (8 - bits_in + need);
+ tmp >>= (8 - bits_in + need);
+ bits_in -= need;
+ bits_out += need;
+ }
- static const unsigned int ppi_dts_bitrate[] =
+ if( bits_out == 8 )
+ {
+ p_out[i_out] = cur;
+ cur = 0;
+ bits_out = 0;
+ i_out++;
+ }
+
+ bits_out += bits_in;
+ cur <<= bits_in;
+ cur |= tmp;
+ }
+
+ return i_out;
+}
+
+static inline int SyncCode( const uint8_t *p_buf )
+{
+ /* 14 bits, little endian version of the bitstream */
+ if( p_buf[0] == 0xff && p_buf[1] == 0x1f &&
+ p_buf[2] == 0x00 && p_buf[3] == 0xe8 &&
+ (p_buf[4] & 0xf0) == 0xf0 && p_buf[5] == 0x07 )
{
- 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 VLC_SUCCESS;
+ }
+ /* 14 bits, big endian version of the bitstream */
+ else if( p_buf[0] == 0x1f && p_buf[1] == 0xff &&
+ p_buf[2] == 0xe8 && p_buf[3] == 0x00 &&
+ p_buf[4] == 0x07 && (p_buf[5] & 0xf0) == 0xf0 )
+ {
+ return VLC_SUCCESS;
+ }
+ /* 16 bits, big endian version of the bitstream */
+ else if( p_buf[0] == 0x7f && p_buf[1] == 0xfe &&
+ p_buf[2] == 0x80 && p_buf[3] == 0x01 )
+ {
+ return VLC_SUCCESS;
+ }
+ /* 16 bits, little endian version of the bitstream */
+ else if( p_buf[0] == 0xfe && p_buf[1] == 0x7f &&
+ p_buf[2] == 0x01 && p_buf[3] == 0x80 )
{
- return( 0 );
+ return VLC_SUCCESS;
}
+ else return VLC_EGENERIC;
+}
- 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);
+static int SyncInfo( const uint8_t *p_buf,
+ unsigned int *pi_channels,
+ unsigned int *pi_channels_conf,
+ unsigned int *pi_sample_rate,
+ unsigned int *pi_bit_rate,
+ unsigned int *pi_frame_length )
+{
+ unsigned int i_audio_mode;
+ unsigned int i_frame_size;
- 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);
+ /* 14 bits, little endian version of the bitstream */
+ if( p_buf[0] == 0xff && p_buf[1] == 0x1f &&
+ p_buf[2] == 0x00 && p_buf[3] == 0xe8 &&
+ (p_buf[4] & 0xf0) == 0xf0 && p_buf[5] == 0x07 )
+ {
+ uint8_t conv_buf[DTS_HEADER_SIZE];
+ Buf14To16( conv_buf, p_buf, DTS_HEADER_SIZE, 1 );
+ i_frame_size = SyncInfo16be( conv_buf, &i_audio_mode, pi_sample_rate,
+ pi_bit_rate, pi_frame_length );
+ i_frame_size = i_frame_size * 8 / 14 * 2;
+ }
+ /* 14 bits, big endian version of the bitstream */
+ else if( p_buf[0] == 0x1f && p_buf[1] == 0xff &&
+ p_buf[2] == 0xe8 && p_buf[3] == 0x00 &&
+ p_buf[4] == 0x07 && (p_buf[5] & 0xf0) == 0xf0 )
+ {
+ uint8_t conv_buf[DTS_HEADER_SIZE];
+ Buf14To16( conv_buf, p_buf, DTS_HEADER_SIZE, 0 );
+ i_frame_size = SyncInfo16be( conv_buf, &i_audio_mode, pi_sample_rate,
+ pi_bit_rate, pi_frame_length );
+ i_frame_size = i_frame_size * 8 / 14 * 2;
+ }
+ /* 16 bits, big endian version of the bitstream */
+ else if( p_buf[0] == 0x7f && p_buf[1] == 0xfe &&
+ p_buf[2] == 0x80 && p_buf[3] == 0x01 )
+ {
+ i_frame_size = SyncInfo16be( p_buf, &i_audio_mode, pi_sample_rate,
+ pi_bit_rate, pi_frame_length );
+ }
+ /* 16 bits, little endian version of the bitstream */
+ else if( p_buf[0] == 0xfe && p_buf[1] == 0x7f &&
+ p_buf[2] == 0x01 && p_buf[3] == 0x80 )
+ {
+ uint8_t conv_buf[DTS_HEADER_SIZE];
+ BufLeToBe( conv_buf, p_buf, DTS_HEADER_SIZE );
+ i_frame_size = SyncInfo16be( p_buf, &i_audio_mode, pi_sample_rate,
+ pi_bit_rate, pi_frame_length );
+ }
+ else return 0;
- switch( i_audio_mode )
+ switch( i_audio_mode & 0xFFFF )
{
case 0x0:
/* Mono */
- *pi_channels = AOUT_CHAN_CENTER;
+ *pi_channels_conf = AOUT_CHAN_CENTER;
break;
case 0x1:
/* Dual-mono = stereo + dual-mono */
- *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
+ *pi_channels_conf = 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;
+ *pi_channels = 2;
+ *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
break;
case 0x5:
/* 3F */
- *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER;
+ *pi_channels = 3;
+ *pi_channels_conf = 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;
+ /* 2F/1R */
+ *pi_channels = 3;
+ *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
+ AOUT_CHAN_REARCENTER;
break;
case 0x7:
- /* 3F/LFE */
- *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
- AOUT_CHAN_CENTER | AOUT_CHAN_LFE;
+ /* 3F/1R */
+ *pi_channels = 4;
+ *pi_channels_conf = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
+ AOUT_CHAN_CENTER | AOUT_CHAN_REARCENTER;
break;
case 0x8:
/* 2F2R */
- *pi_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
- AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
+ *pi_channels = 4;
+ *pi_channels_conf = 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;
+ *pi_channels = 5;
+ *pi_channels_conf = 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;
+ *pi_channels = 6;
+ *pi_channels_conf = 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;
+ *pi_channels = 7;
+ *pi_channels_conf = 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;
+ *pi_channels = 8;
+ *pi_channels_conf = 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:
if( i_audio_mode <= 63 )
{
/* User defined */
- *pi_channels = 0;
- }
- else
- {
- return( 0 );
+ *pi_channels = 0;
+ *pi_channels_conf = 0;
}
+ else return 0;
break;
}
- if( i_sample_rate >= sizeof( ppi_dts_samplerate ) /
- sizeof( ppi_dts_samplerate[0] ) )
+ if( i_audio_mode & 0x10000 )
{
- return( 0 );
+ (*pi_channels)++;
+ *pi_channels_conf |= AOUT_CHAN_LFE;
}
- *pi_sample_rate = ppi_dts_samplerate[ i_sample_rate ];
-
- if( i_bit_rate >= sizeof( ppi_dts_bitrate ) /
- sizeof( ppi_dts_bitrate[0] ) )
+ if( *pi_sample_rate >= sizeof( ppi_dts_samplerate ) /
+ sizeof( ppi_dts_samplerate[0] ) )
{
- return( 0 );
+ return 0;
}
+ *pi_sample_rate = ppi_dts_samplerate[ *pi_sample_rate ];
+ if( !*pi_sample_rate ) return 0;
- *pi_bit_rate = ppi_dts_bitrate[ i_bit_rate ];
+ if( *pi_bit_rate >= sizeof( ppi_dts_bitrate ) /
+ sizeof( ppi_dts_bitrate[0] ) )
+ {
+ return 0;
+ }
+ *pi_bit_rate = ppi_dts_bitrate[ *pi_bit_rate ];
+ if( !*pi_bit_rate ) return 0;
- *pi_frame_length = (i_frame_length + 1) * 32;
+ *pi_frame_length = (*pi_frame_length + 1) * 32;
- return( i_frame_size + 1 );
+ return i_frame_size;
}