Skip to content

V
vlc-gpu
Commit def5f9e2 authored by Laurent Aimar's avatar Laurent Aimar
Browse files
Options

* adpcm: converted to new API (need more testing).

parent 9498c61e
Hide whitespace changes
Inline Side-by-side
Showing with 169 additions and 339 deletions
modules/codec/adpcm.c
View file @ def5f9e2
......@@ -2,7 +2,7 @@
* adpcm.c : adpcm variant audio decoder
*****************************************************************************
* Copyright (C) 2001, 2002 VideoLAN
* $Id: adpcm.c,v 1.13 2003/09/02 20:19:25 gbazin Exp $
* $Id: adpcm.c,v 1.14 2003/11/04 14:51:51 fenrir Exp $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
......@@ -26,74 +26,66 @@
*
* Documentation: http://www.pcisys.net/~melanson/codecs/adpcm.txt
*****************************************************************************/
#include <stdlib.h> /* malloc(), free() */
#include <vlc/vlc.h>
#include <vlc/aout.h>
#include <vlc/decoder.h>
#include <vlc/input.h>
#include <stdlib.h> /* malloc(), free() */
#include <string.h> /* strdup() */
#include "codecs.h"
/*****************************************************************************
* Local prototypes
* Module descriptor
*****************************************************************************/
static int Open ( vlc_object_t * );
vlc_module_begin();
set_description( _("ADPCM audio decoder") );
set_capability( "decoder", 50 );
set_callbacks( Open, NULL );
vlc_module_end();
#define ADPCM_IMA_QT 1
#define ADPCM_IMA_WAV 2
#define ADPCM_MS 3
#define ADPCM_DK3 4
#define ADPCM_DK4 5
typedef struct adec_thread_s
/*****************************************************************************
* Local prototypes
*****************************************************************************/
enum adpcm_codec_e
{
int i_codec;
ADPCM_IMA_QT,
ADPCM_IMA_WAV,
ADPCM_MS,
ADPCM_DK3,
ADPCM_DK4
};
WAVEFORMATEX *p_wf;
struct decoder_sys_t
{
WAVEFORMATEX *p_wf;
enum adpcm_codec_e codec;
int i_block;
uint8_t *p_block;
int i_samplesperblock;
uint8_t *p_buffer; /* buffer for gather pes */ \
int i_buffer; /* bytes present in p_buffer */
/* Input properties */
decoder_fifo_t *p_fifo;
/* Output properties */
/* audio output */
aout_instance_t * p_aout; /* opaque */
aout_input_t * p_aout_input; /* opaque */
audio_sample_format_t output_format;
audio_date_t date;
mtime_t pts;
} adec_thread_t;
static int OpenDecoder ( vlc_object_t * );
static int RunDecoder ( decoder_fifo_t * );
static int InitThread ( adec_thread_t * );
static void DecodeThread ( adec_thread_t * );
static void EndThread ( adec_thread_t * );
};
static int Init ( decoder_t * );
static int Decode( decoder_t *, block_t * );
static int End ( decoder_t * );
static void DecodeAdpcmMs ( adec_thread_t *, aout_buffer_t * );
static void DecodeAdpcmImaWav ( adec_thread_t *, aout_buffer_t * );
static void DecodeAdpcmImaQT ( adec_thread_t *, aout_buffer_t * );
static void DecodeAdpcmDk4 ( adec_thread_t *, aout_buffer_t * );
static void DecodeAdpcmDk3 ( adec_thread_t *, aout_buffer_t * );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin();
set_description( _("ADPCM audio decoder") );
set_capability( "decoder", 50 );
set_callbacks( OpenDecoder, NULL );
vlc_module_end();
static void DecodeAdpcmMs ( decoder_sys_t *, int16_t *, uint8_t * );
static void DecodeAdpcmImaWav ( decoder_sys_t *, int16_t *, uint8_t * );
static void DecodeAdpcmImaQT ( decoder_sys_t *, int16_t *, uint8_t * );
static void DecodeAdpcmDk4 ( decoder_sys_t *, int16_t *, uint8_t * );
static void DecodeAdpcmDk3 ( decoder_sys_t *, int16_t *, uint8_t * );
static int pi_channels_maps[6] =
{
......@@ -149,7 +141,7 @@ static int i_adaptation_coeff2[7] =
* Tries to launch a decoder and return score so that the interface is able
* to choose.
*****************************************************************************/
static int OpenDecoder( vlc_object_t *p_this )
static int Open( vlc_object_t *p_this )
{
decoder_t *p_dec = (decoder_t*)p_this;
......@@ -161,7 +153,11 @@ static int OpenDecoder( vlc_object_t *p_this )
case VLC_FOURCC('m','s',0x00,0x61): /* Duck DK4 ADPCM */
case VLC_FOURCC('m','s',0x00,0x62): /* Duck DK3 ADPCM */
p_dec->pf_run = RunDecoder;
p_dec->pf_init = Init;
p_dec->pf_decode = Decode;
p_dec->pf_end = End;
p_dec->p_sys = malloc( sizeof( decoder_sys_t ) );
return VLC_SUCCESS;
default:
......@@ -170,319 +166,187 @@ static int OpenDecoder( vlc_object_t *p_this )
}
/*****************************************************************************
* RunDecoder: this function is called just after the thread is created
* Init:
*****************************************************************************/
static int RunDecoder( decoder_fifo_t *p_fifo )
static int Init ( decoder_t *p_dec )
{
adec_thread_t *p_adec;
int b_error;
if( !( p_adec = malloc( sizeof( adec_thread_t ) ) ) )
{
msg_Err( p_fifo, "out of memory" );
DecoderError( p_fifo );
return( -1 );
}
memset( p_adec, 0, sizeof( adec_thread_t ) );
p_adec->p_fifo = p_fifo;
decoder_sys_t *p_sys = p_dec->p_sys;
if( InitThread( p_adec ) != 0 )
WAVEFORMATEX *p_wf;
if( ( p_wf = (WAVEFORMATEX*)p_dec->p_fifo->p_waveformatex ) == NULL )
{
DecoderError( p_fifo );
return( -1 );
msg_Err( p_dec, "unknown raw format" );
return VLC_EGENERIC;
}
while( ( !p_adec->p_fifo->b_die )&&( !p_adec->p_fifo->b_error ) )
if( p_wf->nChannels < 1 || p_wf->nChannels > 2 )
{
DecodeThread( p_adec );
msg_Err( p_dec, "bad channels count(1-2)" );
return VLC_EGENERIC;
}
if( ( b_error = p_adec->p_fifo->b_error ) )
if( p_wf->nSamplesPerSec <= 0 )
{
DecoderError( p_adec->p_fifo );
msg_Err( p_dec, "bad samplerate" );
return VLC_EGENERIC;
}
EndThread( p_adec );
if( b_error )
{
return( -1 );
}
return( 0 );
}
#define FREE( p ) if( p ) free( p ); p = NULL
/*****************************************************************************
* InitThread: initialize data before entering main loop
*****************************************************************************/
static int InitThread( adec_thread_t * p_adec )
{
if( ( p_adec->p_wf = (WAVEFORMATEX*)p_adec->p_fifo->p_waveformatex ) == NULL )
{
msg_Err( p_adec->p_fifo, "missing format" );
return( -1 );
}
/* fourcc to codec */
switch( p_adec->p_fifo->i_fourcc )
p_sys->p_wf = p_wf;
switch( p_dec->p_fifo->i_fourcc )
{
case VLC_FOURCC('i','m','a', '4'): /* IMA ADPCM */
p_adec->i_codec = ADPCM_IMA_QT;
p_sys->codec = ADPCM_IMA_QT;
break;
case VLC_FOURCC('m','s',0x00,0x11): /* IMA ADPCM */
p_adec->i_codec = ADPCM_IMA_WAV;
p_sys->codec = ADPCM_IMA_WAV;
break;
case VLC_FOURCC('m','s',0x00,0x02): /* MS ADPCM */
p_adec->i_codec = ADPCM_MS;
p_sys->codec = ADPCM_MS;
break;
case VLC_FOURCC('m','s',0x00,0x61): /* Duck DK4 ADPCM */
p_adec->i_codec = ADPCM_DK4;
p_sys->codec = ADPCM_DK4;
break;
case VLC_FOURCC('m','s',0x00,0x62): /* Duck DK3 ADPCM */
p_adec->i_codec = ADPCM_DK3;
p_sys->codec = ADPCM_DK3;
break;
}
if( p_adec->p_wf->nChannels < 1 ||
p_adec->p_wf->nChannels > 2 )
{
msg_Err( p_adec->p_fifo, "bad channels count(1-2)" );
return( -1 );
}
if( !( p_adec->i_block = p_adec->p_wf->nBlockAlign ) )
if( ( p_sys->i_block = p_wf->nBlockAlign ) <= 0 )
{
if( p_adec->i_codec == ADPCM_IMA_QT )
{
p_adec->i_block = 34 * p_adec->p_wf->nChannels;
}
else
{
p_adec->i_block = 1024; // XXX FIXME
}
msg_Warn( p_adec->p_fifo,
"block size undefined, using %d default",
p_adec->i_block );
p_sys->i_block = p_sys->codec==ADPCM_IMA_QT ? 34*p_wf->nChannels:1024;
msg_Warn( p_dec, "block size undefined, -> using %d", p_sys->i_block );
}
p_adec->p_block = NULL;
/* calculate samples per block */
switch( p_adec->i_codec )
switch( p_sys->codec )
{
case ADPCM_IMA_QT:
p_adec->i_samplesperblock = 64;
p_sys->i_samplesperblock = 64;
break;
case ADPCM_IMA_WAV:
p_adec->i_samplesperblock =
2 * ( p_adec->i_block - 4 * p_adec->p_wf->nChannels )/
p_adec->p_wf->nChannels;
p_sys->i_samplesperblock =
2 * ( p_sys->i_block - 4 * p_wf->nChannels )/ p_wf->nChannels;
break;
case ADPCM_MS:
p_adec->i_samplesperblock =
2 * ( p_adec->i_block - 7 * p_adec->p_wf->nChannels ) /
p_adec->p_wf->nChannels + 2;
p_sys->i_samplesperblock =
2 * (p_sys->i_block - 7 * p_wf->nChannels)/p_wf->nChannels + 2;
break;
case ADPCM_DK4:
p_adec->i_samplesperblock =
2 * ( p_adec->i_block - 4 * p_adec->p_wf->nChannels ) /
p_adec->p_wf->nChannels + 1;
p_sys->i_samplesperblock =
2 * (p_sys->i_block - 4 * p_wf->nChannels)/p_wf->nChannels + 1;
break;
case ADPCM_DK3:
p_adec->p_wf->nChannels = 2;
p_adec->i_samplesperblock = ( 4 * ( p_adec->i_block - 16 ) + 2 )/ 3;
p_wf->nChannels = 2;
p_sys->i_samplesperblock = ( 4 * ( p_sys->i_block - 16 ) + 2 )/ 3;
break;
default:
msg_Err( p_adec->p_fifo, "unknown adpcm variant" );
return( -1 );
}
msg_Dbg( p_adec->p_fifo,
msg_Dbg( p_dec,
"format: samplerate:%dHz channels:%d bits/sample:%d blockalign:%d samplesperblock %d",
p_adec->p_wf->nSamplesPerSec,
p_adec->p_wf->nChannels,
p_adec->p_wf->wBitsPerSample,
p_adec->p_wf->nBlockAlign,
p_adec->i_samplesperblock );
//p_adec->output_format.i_format = VLC_FOURCC('s','1','6','l');
/* FIXME good way ? */
p_adec->output_format.i_format = AOUT_FMT_S16_NE;
p_adec->output_format.i_rate = p_adec->p_wf->nSamplesPerSec;
p_adec->output_format.i_physical_channels =
p_adec->output_format.i_original_channels =
pi_channels_maps[p_adec->p_wf->nChannels];
p_adec->p_aout = NULL;
p_adec->p_aout_input = NULL;
/* **** Create a new audio output **** */
aout_DateInit( &p_adec->date, p_adec->output_format.i_rate );
p_adec->p_aout_input = aout_DecNew( p_adec->p_fifo,
&p_adec->p_aout,
&p_adec->output_format );
if( !p_adec->p_aout_input )
{
msg_Err( p_adec->p_fifo, "cannot create aout" );
return( -1 );
}
/* Init the BitStream */
// InitBitstream( &p_adec->bit_stream, p_adec->p_fifo,
// NULL, NULL );
return( 0 );
}
static void GetPESData( uint8_t *p_buf, int i_max, pes_packet_t *p_pes )
{
int i_copy;
int i_count;
p_wf->nSamplesPerSec, p_wf->nChannels,
p_wf->wBitsPerSample, p_wf->nBlockAlign,
p_sys->i_samplesperblock );
data_packet_t *p_data;
p_sys->output_format.i_format = AOUT_FMT_S16_NE;
p_sys->output_format.i_rate = p_wf->nSamplesPerSec;
p_sys->output_format.i_physical_channels =
p_sys->output_format.i_original_channels =
pi_channels_maps[p_wf->nChannels];
i_count = 0;
p_data = p_pes->p_first;
while( p_data != NULL && i_count < i_max )
p_sys->p_aout = NULL;
p_sys->p_aout_input = aout_DecNew( p_dec,
&p_sys->p_aout, &p_sys->output_format);
if( p_sys->p_aout_input == NULL )
{
i_copy = __MIN( p_data->p_payload_end - p_data->p_payload_start,
i_max - i_count );
if( i_copy > 0 )
{
memcpy( p_buf,
p_data->p_payload_start,
i_copy );
}
p_data = p_data->p_next;
i_count += i_copy;
p_buf += i_copy;
msg_Err( p_dec, "cannot create aout" );
return VLC_EGENERIC;
}
if( i_count < i_max )
{
memset( p_buf, 0, i_max - i_count );
}
aout_DateInit( &p_sys->date, p_sys->output_format.i_rate );
aout_DateSet( &p_sys->date, 0 );
return VLC_SUCCESS;
}
/*****************************************************************************
* DecodeThread: decodes a frame
* Decode:
*****************************************************************************/
static void DecodeThread( adec_thread_t *p_adec )
static int Decode( decoder_t *p_dec, block_t *p_block )
{
aout_buffer_t *p_aout_buffer;
pes_packet_t *p_pes;
int i_frame_size;
decoder_sys_t *p_sys = p_dec->p_sys;
mtime_t i_pts = p_block->i_pts;
uint8_t *p_data = p_block->p_buffer;
int i_data = p_block->i_buffer;
/* **** Get a new frames from streams **** */
do
while( i_data >= p_sys->i_block )
{
input_ExtractPES( p_adec->p_fifo, &p_pes );
if( !p_pes )
{
p_adec->p_fifo->b_error = 1;
return;
}
if( p_pes->i_pts != 0 )
{
p_adec->pts = p_pes->i_pts;
}
i_frame_size = p_pes->i_pes_size;
if( i_frame_size > 0 )
{
if( p_adec->i_buffer < i_frame_size + 16 )
{
FREE( p_adec->p_buffer );
p_adec->p_buffer = malloc( i_frame_size + 16 );
p_adec->i_buffer = i_frame_size + 16;
}
aout_buffer_t *out;
GetPESData( p_adec->p_buffer, p_adec->i_buffer, p_pes );
}
input_DeletePES( p_adec->p_fifo->p_packets_mgt, p_pes );
} while( i_frame_size <= 0 );
for( p_adec->p_block = p_adec->p_buffer;
i_frame_size >= p_adec->i_block;
p_adec->p_block += p_adec->i_block, i_frame_size -= p_adec->i_block )
{
/* get output buffer */
if( p_adec->pts != 0 && p_adec->pts != aout_DateGet( &p_adec->date ) )
if( i_pts != 0 && i_pts != aout_DateGet( &p_sys->date ) )
{
aout_DateSet( &p_adec->date, p_adec->pts );
aout_DateSet( &p_sys->date, i_pts );
}
else if( !aout_DateGet( &p_adec->date ) )
else if( !aout_DateGet( &p_sys->date ) )
{
return;
return VLC_SUCCESS;
}
p_adec->pts = 0;
i_pts = 0;
p_aout_buffer = aout_DecNewBuffer( p_adec->p_aout,
p_adec->p_aout_input,
p_adec->i_samplesperblock );
if( !p_aout_buffer )
out = aout_DecNewBuffer( p_sys->p_aout,
p_sys->p_aout_input,
p_sys->i_samplesperblock );
if( out == NULL )
{
msg_Err( p_adec->p_fifo, "cannot get aout buffer" );
p_adec->p_fifo->b_error = 1;
return;
msg_Err( p_dec, "cannot get aout buffer" );
return VLC_EGENERIC;
}
out->start_date = aout_DateGet( &p_sys->date );
out->end_date = aout_DateIncrement( &p_sys->date,
p_sys->i_samplesperblock );
p_aout_buffer->start_date = aout_DateGet( &p_adec->date );
p_aout_buffer->end_date = aout_DateIncrement( &p_adec->date,
p_adec->i_samplesperblock );
/* decode */
switch( p_adec->i_codec )
switch( p_sys->codec )
{
case ADPCM_IMA_QT:
DecodeAdpcmImaQT( p_adec, p_aout_buffer );
DecodeAdpcmImaQT( p_sys, (int16_t*)out->p_buffer, p_data );
break;
case ADPCM_IMA_WAV:
DecodeAdpcmImaWav( p_adec, p_aout_buffer );
DecodeAdpcmImaWav( p_sys, (int16_t*)out->p_buffer, p_data );
break;
case ADPCM_MS:
DecodeAdpcmMs( p_adec, p_aout_buffer );
DecodeAdpcmMs( p_sys, (int16_t*)out->p_buffer, p_data );
break;
case ADPCM_DK4:
DecodeAdpcmDk4( p_adec, p_aout_buffer );
DecodeAdpcmDk4( p_sys, (int16_t*)out->p_buffer, p_data );
break;
case ADPCM_DK3:
DecodeAdpcmDk3( p_adec, p_aout_buffer );
DecodeAdpcmDk3( p_sys, (int16_t*)out->p_buffer, p_data );
break;
default:
break;
}
aout_DecPlay( p_sys->p_aout, p_sys->p_aout_input, out );
/* **** Now we can output these samples **** */
aout_DecPlay( p_adec->p_aout, p_adec->p_aout_input, p_aout_buffer );
p_data += p_sys->i_block;
i_data -= p_sys->i_block;
}
}
return VLC_SUCCESS;
}
/*****************************************************************************
* EndThread : faad decoder thread destruction
* End:
*****************************************************************************/
static void EndThread (adec_thread_t *p_adec)
static int End ( decoder_t *p_dec )
{
if( p_adec->p_aout_input )
decoder_sys_t *p_sys = p_dec->p_sys;
if( p_sys->p_aout_input )
{
aout_DecDelete( p_adec->p_aout, p_adec->p_aout_input );
aout_DecDelete( p_sys->p_aout, p_sys->p_aout_input );
}
free( p_sys );
msg_Dbg( p_adec->p_fifo, "adpcm audio decoder closed" );
FREE( p_adec->p_buffer );
free( p_adec );
return VLC_SUCCESS;
}
#define CLAMP( v, min, max ) \
if( (v) < (min) ) (v) = (min); \
if( (v) > (max) ) (v) = (max)
......@@ -534,18 +398,14 @@ static int AdpcmMsExpandNibble(adpcm_ms_channel_t *p_channel,
return( i_predictor );
}
static void DecodeAdpcmMs( adec_thread_t *p_adec,
aout_buffer_t *p_aout_buffer)
static void DecodeAdpcmMs( decoder_sys_t *p_sys, int16_t *p_sample, uint8_t *p_buffer )
{
uint8_t *p_buffer;
adpcm_ms_channel_t channel[2];
int i_nibbles;
uint16_t *p_sample;
int b_stereo;
int i_block_predictor;
p_buffer = p_adec->p_block;
b_stereo = p_adec->p_wf->nChannels == 2 ? 1 : 0;
b_stereo = p_sys->p_wf->nChannels == 2 ? 1 : 0;
GetByte( i_block_predictor );
CLAMP( i_block_predictor, 0, 6 );
......@@ -577,33 +437,26 @@ static void DecodeAdpcmMs( adec_thread_t *p_adec,
GetWord( channel[1].i_sample2 );
}
p_sample = (int16_t*)p_aout_buffer->p_buffer;
if( b_stereo )
{
*p_sample = channel[0].i_sample2; p_sample++;
*p_sample = channel[1].i_sample2; p_sample++;
*p_sample = channel[0].i_sample1; p_sample++;
*p_sample = channel[1].i_sample1; p_sample++;
*p_sample++ = channel[0].i_sample2;
*p_sample++ = channel[1].i_sample2;
*p_sample++ = channel[0].i_sample1;
*p_sample++ = channel[1].i_sample1;
}
else
{
*p_sample = channel[0].i_sample2; p_sample++;
*p_sample = channel[0].i_sample1; p_sample++;
*p_sample++ = channel[0].i_sample2;
*p_sample++ = channel[0].i_sample1;
}
for( i_nibbles = 2 *( p_adec->i_block - 7 * p_adec->p_wf->nChannels );
for( i_nibbles = 2 *( p_sys->i_block - 7 * p_sys->p_wf->nChannels );
i_nibbles > 0; i_nibbles -= 2,p_buffer++ )
{
*p_sample = AdpcmMsExpandNibble( &channel[0], (*p_buffer) >> 4);
p_sample++;
*p_sample = AdpcmMsExpandNibble( &channel[b_stereo ? 1 : 0],
(*p_buffer)&0x0f);
p_sample++;
*p_sample++ = AdpcmMsExpandNibble( &channel[0], (*p_buffer) >> 4);
*p_sample++ = AdpcmMsExpandNibble( &channel[b_stereo ? 1 : 0],
(*p_buffer)&0x0f);
}
}
/*
......@@ -639,17 +492,13 @@ static int AdpcmImaWavExpandNibble(adpcm_ima_wav_channel_t *p_channel,
return( p_channel->i_predictor );
}
static void DecodeAdpcmImaWav( adec_thread_t *p_adec,
aout_buffer_t *p_aout_buffer)
static void DecodeAdpcmImaWav( decoder_sys_t *p_sys, int16_t *p_sample, uint8_t *p_buffer )
{
uint8_t *p_buffer;
adpcm_ima_wav_channel_t channel[2];
int i_nibbles;
uint16_t *p_sample;
int b_stereo;
p_buffer = p_adec->p_block;
b_stereo = p_adec->p_wf->nChannels == 2 ? 1 : 0;
b_stereo = p_sys->p_wf->nChannels == 2 ? 1 : 0;
GetWord( channel[0].i_predictor );
GetByte( channel[0].i_step_index );
......@@ -664,10 +513,9 @@ static void DecodeAdpcmImaWav( adec_thread_t *p_adec,
p_buffer++;
}
p_sample = (int16_t*)p_aout_buffer->p_buffer;
if( b_stereo )
{
for( i_nibbles = 2 * (p_adec->i_block - 8);
for( i_nibbles = 2 * (p_sys->i_block - 8);
i_nibbles > 0;
i_nibbles -= 16 )
{
......@@ -698,14 +546,12 @@ static void DecodeAdpcmImaWav( adec_thread_t *p_adec,
}
else
{
for( i_nibbles = 2 * (p_adec->i_block - 4);
for( i_nibbles = 2 * (p_sys->i_block - 4);
i_nibbles > 0;
i_nibbles -= 2, p_buffer++ )
{
*p_sample =AdpcmImaWavExpandNibble( &channel[0], (*p_buffer)&0x0f );
p_sample++;
*p_sample =AdpcmImaWavExpandNibble( &channel[0], (*p_buffer) >> 4 );
p_sample++;
*p_sample++ =AdpcmImaWavExpandNibble( &channel[0], (*p_buffer)&0x0f );
*p_sample++ =AdpcmImaWavExpandNibble( &channel[0], (*p_buffer) >> 4 );
}
}
}
......@@ -713,22 +559,17 @@ static void DecodeAdpcmImaWav( adec_thread_t *p_adec,
/*
* Ima4 in QT file
*/
static void DecodeAdpcmImaQT( adec_thread_t *p_adec,
aout_buffer_t *p_aout_buffer )
static void DecodeAdpcmImaQT( decoder_sys_t *p_sys, int16_t *p_sample, uint8_t *p_buffer )
{
uint8_t *p_buffer;
adpcm_ima_wav_channel_t channel[2];
int i_nibbles;
uint16_t *p_sample;
int i_ch;
int i_step;
p_buffer = p_adec->p_block;
i_step = p_adec->p_wf->nChannels;
i_step = p_sys->p_wf->nChannels;
for( i_ch = 0; i_ch < p_adec->p_wf->nChannels; i_ch++ )
for( i_ch = 0; i_ch < p_sys->p_wf->nChannels; i_ch++ )
{
p_sample = ((int16_t*)p_aout_buffer->p_buffer) + i_ch;
/* load preambule */
channel[i_ch].i_predictor = (int16_t)((( ( p_buffer[0] << 1 )|( p_buffer[1] >> 7 ) ))<<7);
channel[i_ch].i_step_index = p_buffer[1]&0x7f;
......@@ -746,6 +587,9 @@ static void DecodeAdpcmImaQT( adec_thread_t *p_adec,
p_buffer++;
}
/* Next channel */
p_sample += 1 - 64 * i_step;
}
}
......@@ -753,17 +597,13 @@ static void DecodeAdpcmImaQT( adec_thread_t *p_adec,
* Dk4
*/
static void DecodeAdpcmDk4( adec_thread_t *p_adec,
aout_buffer_t *p_aout_buffer)
static void DecodeAdpcmDk4( decoder_sys_t *p_sys, int16_t *p_sample, uint8_t *p_buffer )
{
uint8_t *p_buffer;
adpcm_ima_wav_channel_t channel[2];
int i_nibbles;
uint16_t *p_sample;
int b_stereo;
p_buffer = p_adec->p_block;
b_stereo = p_adec->p_wf->nChannels == 2 ? 1 : 0;
b_stereo = p_sys->p_wf->nChannels == 2 ? 1 : 0;
GetWord( channel[0].i_predictor );
GetByte( channel[0].i_step_index );
......@@ -778,8 +618,6 @@ static void DecodeAdpcmDk4( adec_thread_t *p_adec,
p_buffer++;
}
p_sample = (int16_t*)p_aout_buffer->p_buffer;
/* first output predictor */
*p_sample++ = channel[0].i_predictor;
if( b_stereo )
......@@ -788,7 +626,7 @@ static void DecodeAdpcmDk4( adec_thread_t *p_adec,
}
for( i_nibbles = 0;
i_nibbles < p_adec->i_block - 4 * (b_stereo ? 2:1 );
i_nibbles < p_sys->i_block - 4 * (b_stereo ? 2:1 );
i_nibbles++ )
{
*p_sample++ = AdpcmImaWavExpandNibble( &channel[0],
......@@ -803,29 +641,22 @@ static void DecodeAdpcmDk4( adec_thread_t *p_adec,
/*
* Dk3
*/
static void DecodeAdpcmDk3( adec_thread_t *p_adec,
aout_buffer_t *p_aout_buffer)
static void DecodeAdpcmDk3( decoder_sys_t *p_sys, int16_t *p_sample, uint8_t *p_buffer )
{
uint8_t *p_buffer, *p_end;
uint8_t *p_end = &p_buffer[p_sys->i_block];
adpcm_ima_wav_channel_t sum;
adpcm_ima_wav_channel_t diff;
uint16_t *p_sample;
int i_diff_value;
p_buffer = p_adec->p_block;
p_end = p_buffer + p_adec->i_block;
p_buffer += 10;
GetWord( sum.i_predictor );
GetWord( diff.i_predictor );
GetByte( sum.i_step_index );
GetByte( diff.i_step_index );
p_sample = (int16_t*)p_aout_buffer->p_buffer;
i_diff_value = diff.i_predictor;
/* we process 6 nibbles at once */
//for( i_group = 0; i_group < ( p_adec->i_block -16 ) / 3; i_group++ )
while( p_buffer + 1 <= p_end )
{
/* first 3 nibbles */
......@@ -869,7 +700,6 @@ static void DecodeAdpcmDk3( adec_thread_t *p_adec,
*p_sample++ = sum.i_predictor + i_diff_value;
*p_sample++ = sum.i_predictor - i_diff_value;
}
}
}
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment