From e2dedee8cc0901fc9c5ca8dfd1513ee75eb09379 Mon Sep 17 00:00:00 2001 From: Laurent Aimar Date: Sun, 16 Feb 2003 09:50:22 +0000 Subject: [PATCH] * adpcm: added DUCK 4 variant support. (thx M. Melanson who provided me somes samples.) --- modules/codec/adpcm.c | 121 ++++++++++++++++++++++++++++++++---------- 1 file changed, 93 insertions(+), 28 deletions(-) diff --git a/modules/codec/adpcm.c b/modules/codec/adpcm.c index 50e51f3ad5..41944a07ef 100644 --- a/modules/codec/adpcm.c +++ b/modules/codec/adpcm.c @@ -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 - * + * * 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++; + } +} -- 2.39.2