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Commit e2dedee8 authored by Laurent Aimar's avatar Laurent Aimar
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* adpcm: added DUCK 4 variant support. (thx M. Melanson who provided me 

somes samples.)
parent 25c8c4c9
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Showing with 93 additions and 28 deletions
modules/codec/adpcm.c
View file @ e2dedee8
......@@ -2,15 +2,15 @@
* adpcm.c : adpcm variant audio decoder
*****************************************************************************
* Copyright (C) 2001, 2002 VideoLAN
* $Id: adpcm.c,v 1.6 2003/01/13 17:39:05 fenrir Exp $
* $Id: adpcm.c,v 1.7 2003/02/16 09:50:22 fenrir Exp $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
*
* 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
......@@ -41,6 +41,8 @@
#define ADPCM_IMA_QT 1
#define ADPCM_IMA_WAV 2
#define ADPCM_MS 3
#define ADPCM_DK3 4
#define ADPCM_DK4 4
typedef struct adec_thread_s
{
......@@ -78,6 +80,7 @@ static void EndThread ( adec_thread_t * );
static void DecodeAdpcmMs( adec_thread_t *, aout_buffer_t * );
static void DecodeAdpcmImaWav( adec_thread_t *, aout_buffer_t * );
static void DecodeAdpcmDk4( adec_thread_t *, aout_buffer_t * );
/*****************************************************************************
* Module descriptor
......@@ -98,7 +101,7 @@ static int pi_channels_maps[6] =
AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER,
AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARLEFT,
AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARLEFT
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARLEFT
};
/* Various table from http://www.pcisys.net/~melanson/codecs/adpcm.txt */
......@@ -147,18 +150,18 @@ static int i_adaptation_coeff2[7] =
static int OpenDecoder( vlc_object_t *p_this )
{
decoder_fifo_t *p_fifo = (decoder_fifo_t*) p_this;
switch( p_fifo->i_fourcc )
{
{
// case VLC_FOURCC('i','m','a', '4'): /* IMA ADPCM */
case VLC_FOURCC('m','s',0x00,0x02): /* MS ADPCM */
case VLC_FOURCC('m','s',0x00,0x11): /* IMA ADPCM */
// case VLC_FOURCC('m','s',0x00,0x61): /* Duck DK4 ADPCM */
case VLC_FOURCC('m','s',0x00,0x61): /* Duck DK4 ADPCM */
// case VLC_FOURCC('m','s',0x00,0x62): /* Duck DK3 ADPCM */
p_fifo->pf_run = RunDecoder;
return VLC_SUCCESS;
default:
return VLC_EGENERIC;
}
......@@ -180,7 +183,7 @@ static int RunDecoder( decoder_fifo_t *p_fifo )
return( -1 );
}
memset( p_adec, 0, sizeof( adec_thread_t ) );
p_adec->p_fifo = p_fifo;
if( InitThread( p_adec ) != 0 )
......@@ -242,12 +245,14 @@ static int InitThread( adec_thread_t * p_adec )
p_adec->i_codec = ADPCM_MS;
break;
case VLC_FOURCC('m','s',0x00,0x61): /* Duck DK4 ADPCM */
p_adec->i_codec = ADPCM_DK4;
break;
case VLC_FOURCC('m','s',0x00,0x62): /* Duck DK3 ADPCM */
p_adec->i_codec = 0;
p_adec->i_codec = ADPCM_DK3;
break;
}
if( p_adec->p_wf->nChannels < 1 ||
if( p_adec->p_wf->nChannels < 1 ||
p_adec->p_wf->nChannels > 2 )
{
msg_Err( p_adec->p_fifo, "bad channels count(1-2)" );
......@@ -276,19 +281,24 @@ static int InitThread( adec_thread_t * p_adec )
p_adec->i_samplesperblock = 64;
break;
case ADPCM_IMA_WAV:
p_adec->i_samplesperblock =
p_adec->i_samplesperblock =
2 * ( p_adec->i_block - 4 * p_adec->p_wf->nChannels )/
p_adec->p_wf->nChannels;
break;
case ADPCM_MS:
p_adec->i_samplesperblock =
2 * ( p_adec->i_block - 7 * p_adec->p_wf->nChannels ) /
p_adec->i_samplesperblock =
2 * ( p_adec->i_block - 7 * p_adec->p_wf->nChannels ) /
p_adec->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;
break;
default:
p_adec->i_samplesperblock = 0;
}
msg_Dbg( p_adec->p_fifo,
"format: samplerate:%dHz channels:%d bits/sample:%d blockalign:%d samplesperblock %d",
p_adec->p_wf->nSamplesPerSec,
......@@ -442,6 +452,8 @@ static void DecodeThread( adec_thread_t *p_adec )
case ADPCM_MS:
DecodeAdpcmMs( p_adec, p_aout_buffer );
break;
case ADPCM_DK4:
DecodeAdpcmDk4( p_adec, p_aout_buffer );
default:
break;
}
......@@ -480,9 +492,12 @@ static void EndThread (adec_thread_t *p_adec)
(v) |= ( *p_buffer ) << 8; p_buffer++; \
if( (v)&0x8000 ) (v) -= 0x010000;
/*
* MS
*/
typedef struct adpcm_ms_channel_s
{
int i_idelta;
int i_idelta;
int i_sample1, i_sample2;
int i_coeff1, i_coeff2;
......@@ -497,7 +512,7 @@ static int AdpcmMsExpandNibble(adpcm_ms_channel_t *p_channel,
/* expand sign */
i_snibble = i_nibble - ( i_nibble&0x08 ? 0x10 : 0 );
i_predictor = ( p_channel->i_sample1 * p_channel->i_coeff1 +
p_channel->i_sample2 * p_channel->i_coeff2 ) / 256 +
i_snibble * p_channel->i_idelta;
......@@ -515,7 +530,7 @@ 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)
{
......@@ -525,7 +540,7 @@ static void DecodeAdpcmMs( adec_thread_t *p_adec,
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;
......@@ -546,7 +561,7 @@ static void DecodeAdpcmMs( adec_thread_t *p_adec,
{
GetWord( channel[1].i_idelta );
}
GetWord( channel[0].i_sample1 );
if( b_stereo )
{
......@@ -579,15 +594,18 @@ static void DecodeAdpcmMs( adec_thread_t *p_adec,
{
*p_sample = AdpcmMsExpandNibble( &channel[0], (*p_buffer) >> 4);
p_sample++;
*p_sample = AdpcmMsExpandNibble( &channel[b_stereo ? 1 : 0],
(*p_buffer)&0x0f);
p_sample++;
}
}
/*
* IMA-WAV
*/
typedef struct adpcm_ima_wav_channel_s
{
int i_predictor;
......@@ -618,7 +636,7 @@ static int AdpcmImaWavExpandNibble(adpcm_ima_wav_channel_t *p_channel,
return( p_channel->i_predictor );
}
static void DecodeAdpcmImaWav( adec_thread_t *p_adec,
static void DecodeAdpcmImaWav( adec_thread_t *p_adec,
aout_buffer_t *p_aout_buffer)
{
uint8_t *p_buffer;
......@@ -626,7 +644,7 @@ static void DecodeAdpcmImaWav( adec_thread_t *p_adec,
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;
......@@ -642,7 +660,7 @@ static void DecodeAdpcmImaWav( adec_thread_t *p_adec,
CLAMP( channel[1].i_step_index, 0, 88 );
p_buffer++;
}
p_sample = (int16_t*)p_aout_buffer->p_buffer;
if( b_stereo )
{
......@@ -660,7 +678,7 @@ static void DecodeAdpcmImaWav( adec_thread_t *p_adec,
AdpcmImaWavExpandNibble(&channel[0],p_buffer[i] >> 4);
}
p_buffer += 4;
for( i = 0; i < 4; i++ )
{
p_sample[i * 4 + 1] =
......@@ -677,8 +695,8 @@ static void DecodeAdpcmImaWav( adec_thread_t *p_adec,
}
else
{
for( i_nibbles = 2 * (p_adec->i_block - 4);
i_nibbles > 0;
for( i_nibbles = 2 * (p_adec->i_block - 4);
i_nibbles > 0;
i_nibbles -= 2, p_buffer++ )
{
*p_sample =AdpcmImaWavExpandNibble( &channel[0], (*p_buffer)&0x0f );
......@@ -689,6 +707,53 @@ static void DecodeAdpcmImaWav( adec_thread_t *p_adec,
}
}
/*
* Dk4
*/
static void DecodeAdpcmDk4( adec_thread_t *p_adec,
aout_buffer_t *p_aout_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;
GetWord( channel[0].i_predictor );
GetByte( channel[0].i_step_index );
CLAMP( channel[0].i_step_index, 0, 88 );
p_buffer++;
if( b_stereo )
{
GetWord( channel[1].i_predictor );
GetByte( channel[1].i_step_index );
CLAMP( channel[1].i_step_index, 0, 88 );
p_buffer++;
}
p_sample = (int16_t*)p_aout_buffer->p_buffer;
/* first output predictor */
*p_sample++ = channel[0].i_predictor;
if( b_stereo )
{
*p_sample++ = channel[1].i_predictor;
}
for( i_nibbles = 0;
i_nibbles < p_adec->i_block - 4 * (b_stereo ? 2:1 );
i_nibbles++ )
{
*p_sample++ = AdpcmImaWavExpandNibble( &channel[0],
(*p_buffer) >> 4);
*p_sample++ = AdpcmImaWavExpandNibble( &channel[b_stereo ? 1 : 0],
(*p_buffer)&0x0f);
p_buffer++;
}
}
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