* dts.c: parse DTS audio sync info and packetize the stream
*****************************************************************************
* Copyright (C) 2003 VideoLAN
- * $Id: dts.c,v 1.9 2003/12/22 14:32:55 sam Exp $
+ * $Id: dts.c,v 1.10 2004/01/21 17:56:05 gbazin Exp $
*
* Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
* Gildas Bazin <gbazin@netcourrier.com>
#include "vlc_block_helper.h"
-#define DTS_HEADER_SIZE 10
+#define DTS_HEADER_SIZE 12
/*****************************************************************************
* decoder_sys_t : decoder descriptor
static void CloseDecoder ( vlc_object_t * );
static void *DecodeBlock ( decoder_t *, block_t ** );
-static int SyncInfo ( const byte_t *, unsigned int *, unsigned int *,
+static inline int SyncCode( const uint8_t * );
+static int SyncInfo ( const uint8_t *, unsigned int *, unsigned int *,
unsigned int *, unsigned int *, unsigned int * );
static uint8_t *GetOutBuffer ( decoder_t *, void ** );
switch( p_sys->i_state )
{
case STATE_NOSYNC:
- /* Look for sync dword - should be 0x7ffe8001 */
- while( block_PeekBytes( &p_sys->bytestream, p_header, 4 )
+ /* Look for sync code - should be 0x7ffe8001 */
+ while( block_PeekBytes( &p_sys->bytestream, p_header, 6 )
== VLC_SUCCESS )
{
- if( p_header[0] == 0x7f && p_header[1] == 0xfe &&
- p_header[2] == 0x80 && p_header[3] == 0x01 )
+ if( SyncCode( p_header ) == VLC_SUCCESS )
{
p_sys->i_state = STATE_SYNC;
break;
/* Check if next expected frame contains the sync word */
if( block_PeekOffsetBytes( &p_sys->bytestream,
- p_sys->i_frame_size, p_header, 4 )
+ p_sys->i_frame_size, p_header, 6 )
!= VLC_SUCCESS )
{
/* Need more data */
return NULL;
}
- if( p_header[0] != 0x7f || p_header[1] != 0xfe ||
- p_header[2] != 0x80 || p_header[3] != 0x01 )
+ if( SyncCode( p_header ) != VLC_SUCCESS )
{
msg_Dbg( p_dec, "emulated sync word "
"(no sync on following frame) %2.2x%2.2x%2.2x%2.2x",
- p_header[0], p_header[1], p_header[2], p_header[3] );
+ (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;
/*****************************************************************************
* SyncInfo: parse DTS sync info
*****************************************************************************/
-static int SyncInfo( const byte_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 )
+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
+};
+
+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;
- static const unsigned int ppi_dts_samplerate[] =
+ *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);
+
+ return i_frame_size + 1;
+}
+
+static int Buf14leTO16be( uint8_t *p_out, const uint8_t *p_in, int i_in )
+{
+ unsigned char tmp, cur = 0;
+ int bits_in, bits_out = 0;
+ int i, i_out = 0;
+
+ for( i = 0; i < i_in; i++ )
{
- 0, 8000, 16000, 32000, 64000, 128000,
- 11025, 22050, 44010, 88020, 176400,
- 12000, 24000, 48000, 96000, 192000
- };
+ if( i%2 )
+ {
+ tmp = p_in[i-1];
+ bits_in = 8;
+ }
+ else
+ {
+ tmp = p_in[i+1] & 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;
+ }
+
+ 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 const unsigned int ppi_dts_bitrate[] =
+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( (p_buf[0] != 0x7f) || (p_buf[1] != 0xfe) ||
- (p_buf[2] != 0x80) || (p_buf[3] != 0x01) )
+ 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( 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[12];
+ Buf14leTO16be( conv_buf, p_buf, 12 );
+ 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 );
+ }
+ else return 0;
switch( i_audio_mode )
{
*pi_channels = 0;
*pi_channels_conf = 0;
}
- else
- {
- return( 0 );
- }
+ else return 0;
break;
}
- if( i_sample_rate >= sizeof( ppi_dts_samplerate ) /
- sizeof( ppi_dts_samplerate[0] ) )
+ if( *pi_sample_rate >= sizeof( ppi_dts_samplerate ) /
+ sizeof( ppi_dts_samplerate[0] ) )
{
- return( 0 );
+ return 0;
}
- *pi_sample_rate = ppi_dts_samplerate[ i_sample_rate ];
+ *pi_sample_rate = ppi_dts_samplerate[ *pi_sample_rate ];
- if( i_bit_rate >= sizeof( ppi_dts_bitrate ) /
- sizeof( ppi_dts_bitrate[0] ) )
+ if( *pi_bit_rate >= sizeof( ppi_dts_bitrate ) /
+ sizeof( ppi_dts_bitrate[0] ) )
{
- return( 0 );
+ return 0;
}
- *pi_bit_rate = ppi_dts_bitrate[ i_bit_rate ];
+ *pi_bit_rate = ppi_dts_bitrate[ *pi_bit_rate ];
- *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;
}
* dts.c : raw DTS stream input module for vlc
*****************************************************************************
* Copyright (C) 2001 VideoLAN
- * $Id: dts.c,v 1.1 2003/12/01 23:39:11 gbazin Exp $
+ * $Id: dts.c,v 1.2 2004/01/21 17:56:05 gbazin Exp $
*
* Authors: Gildas Bazin <gbazin@netcourrier.com>
*
#include <vlc_codec.h>
#define DTS_PACKET_SIZE 16384
+#define DTS_MAX_HEADER_SIZE 11
/*****************************************************************************
* Local prototypes
input_thread_t *p_input = (input_thread_t *)p_this;
demux_sys_t *p_sys;
byte_t * p_peek;
+ int i_peek = 0;
p_input->pf_demux = Demux;
p_input->pf_demux_control = demux_vaControlDefault;
p_input->pf_rewind = NULL;
+ /* Check if we are dealing with a WAV file */
+ if( input_Peek( p_input, &p_peek, 12 ) == 12 &&
+ !strncmp( p_peek, "RIFF", 4 ) && !strncmp( &p_peek[8], "WAVE", 4 ) )
+ {
+ /* Skip the wave header */
+ i_peek = 12 + 8;
+ while( input_Peek( p_input, &p_peek, i_peek ) == i_peek &&
+ strncmp( p_peek + i_peek - 8, "data", 4 ) )
+ {
+ i_peek += GetDWLE( p_peek + i_peek - 4 ) + 8;
+ }
+ }
+
/* Have a peep at the show. */
- if( input_Peek( p_input, &p_peek, 4 ) < 4 )
+ if( input_Peek( p_input, &p_peek, i_peek + DTS_MAX_HEADER_SIZE ) <
+ i_peek + DTS_MAX_HEADER_SIZE )
{
- /* Stream shorter than 4 bytes... */
+ /* Stream too short */
msg_Err( p_input, "cannot peek()" );
return VLC_EGENERIC;
}
- if( p_peek[0] != 0x7f || p_peek[1] != 0xfe ||
- p_peek[2] != 0x80 || p_peek[3] != 0x01 )
+ /* 14 bits, little endian version of the bitstream */
+ if( p_peek[i_peek + 0] == 0xff && p_peek[i_peek + 1] == 0x1f &&
+ p_peek[i_peek + 2] == 0x00 && p_peek[i_peek + 3] == 0xe8 &&
+ (p_peek[i_peek + 4] & 0xf0) == 0xf0 && p_peek[i_peek + 5] == 0x07 )
+ {
+ }
+ /* 16 bits, big endian version of the bitstream */
+ else if( p_peek[i_peek + 0] == 0x7f && p_peek[i_peek + 1] == 0xfe &&
+ p_peek[i_peek + 2] == 0x80 && p_peek[i_peek + 3] == 0x01 )
+ {
+ }
+ else
{
if( p_input->psz_demux && !strncmp( p_input->psz_demux, "dts", 3 ) )
{
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