/*****************************************************************************
* dts.c: parse DTS audio sync info and packetize the stream
*****************************************************************************
- * Copyright (C) 2003-2009 the VideoLAN team
+ * Copyright (C) 2003-2009 VLC authors and VideoLAN
* $Id$
*
* Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_codec.h>
-#include <vlc_aout.h>
#include <vlc_block_helper.h>
#include <vlc_bits.h>
#include <vlc_modules.h>
#include <vlc_cpu.h>
#include "../packetizer/packetizer_helper.h"
+#include "dts_header.h"
/*****************************************************************************
* Module descriptor
unsigned int i_channels_conf;
};
-#define DTS_HEADER_SIZE 14
-
/****************************************************************************
* Local prototypes
****************************************************************************/
static int OpenCommon( vlc_object_t *, bool b_packetizer );
static block_t *DecodeBlock( decoder_t *, block_t ** );
-static inline int SyncCode( const uint8_t * );
static int SyncInfo( const uint8_t *, bool *, unsigned int *, unsigned int *,
unsigned int *, unsigned int *, unsigned int * );
-static uint8_t *GetOutBuffer ( decoder_t *, block_t ** );
-static aout_buffer_t *GetAoutBuffer( decoder_t * );
-static block_t *GetSoutBuffer( decoder_t * );
+static uint8_t *GetOutBuffer ( decoder_t *, block_t ** );
+static block_t *GetAoutBuffer( decoder_t * );
+static block_t *GetSoutBuffer( decoder_t * );
/*****************************************************************************
* OpenDecoder: probe the decoder
static int OpenDecoder( vlc_object_t *p_this )
{
/* HACK: Don't use this codec if we don't have an dts audio filter */
- if( !HAVE_FPU || !module_exists( "dtstofloat32" ) )
+ if( !module_exists( "dtstofloat32" ) )
return VLC_EGENERIC;
return OpenCommon( p_this, false );
}
else
{
- aout_buffer_t *p_aout_buffer = GetAoutBuffer( p_dec );
+ block_t *p_aout_buffer = GetAoutBuffer( p_dec );
p_buf = p_aout_buffer ? p_aout_buffer->p_buffer : NULL;
*pp_out_buffer = p_aout_buffer;
}
/*****************************************************************************
* GetAoutBuffer:
*****************************************************************************/
-static aout_buffer_t *GetAoutBuffer( decoder_t *p_dec )
+static block_t *GetAoutBuffer( decoder_t *p_dec )
{
decoder_sys_t *p_sys = p_dec->p_sys;
- aout_buffer_t *p_buf;
+ block_t *p_buf;
/* Hack for DTS S/PDIF filter which needs to send 3 frames at a time
* (plus a few header bytes) */
p_buf = decoder_NewAudioBuffer( 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_buffer = p_sys->i_frame_size;
decoder_sys_t *p_sys = p_dec->p_sys;
block_t *p_block;
- p_block = block_New( p_dec, p_sys->i_frame_size );
+ p_block = block_Alloc( p_sys->i_frame_size );
if( p_block == NULL ) return NULL;
p_block->i_pts = p_block->i_dts = date_Get( &p_sys->end_date );
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_frame_size;
- 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 void BufLeToBe( uint8_t *p_out, const uint8_t *p_in, int i_in )
-{
- int i;
-
- for( i = 0; i < i_in/2; i++ )
- {
- 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;
- }
-
- 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 )
- {
- 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 VLC_SUCCESS;
- }
- /* DTS-HD */
- else if( p_buf[0] == 0x64 && p_buf[1] == 0x58 &&
- p_buf[2] == 0x20 && p_buf[3] == 0x25 )
- {
- return VLC_SUCCESS;
- }
-
- return VLC_EGENERIC;
-}
-
static int SyncInfo( const uint8_t *p_buf,
bool *pb_dts_hd,
unsigned int *pi_channels,
unsigned int *pi_frame_length )
{
unsigned int i_audio_mode;
- unsigned int i_frame_size;
- /* 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 );
- }
- /* DTS-HD */
- else
- {
- assert( p_buf[0] == 0x64 && p_buf[1] == 0x58 &&
- p_buf[2] == 0x20 && p_buf[3] == 0x25 );
-
- int i_dts_hd_size;
- bs_t s;
- bs_init( &s, &p_buf[4], DTS_HEADER_SIZE - 4 );
-
- bs_skip( &s, 8 + 2 );
-
- if( bs_read1( &s ) )
- {
- bs_skip( &s, 12 );
- i_dts_hd_size = bs_read( &s, 20 ) + 1;
- }
- else
- {
- bs_skip( &s, 8 );
- i_dts_hd_size = bs_read( &s, 16 ) + 1;
- }
- //uint16_t s0 = bs_read( &s, 16 );
- //uint16_t s1 = bs_read( &s, 16 );
- //fprintf( stderr, "DTS HD=%d : %x %x\n", i_dts_hd_size, s0, s1 );
-
- *pb_dts_hd = true;
- /* As we ignore the stream, do not modify those variables:
- *pi_channels = ;
- *pi_channels_conf = ;
- *pi_sample_rate = ;
- *pi_bit_rate = ;
- *pi_frame_length = ;
- */
- return i_dts_hd_size;
- }
+ unsigned int i_frame_size = GetSyncInfo( p_buf, pb_dts_hd,
+ pi_sample_rate, pi_bit_rate, pi_frame_length, &i_audio_mode);
- *pb_dts_hd = false;
+ if( *pb_dts_hd == true )
+ return i_frame_size;
switch( i_audio_mode & 0xFFFF )
{
projects / vlc / blobdiff