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Improve CD-XA detection and RIFF-less support; minor XA code cleanup

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This commit is contained in:
bnnm 2017-11-16 19:47:42 +01:00
parent 6d7d6dcd54
commit 4dfbc3cf6a
5 changed files with 171 additions and 158 deletions
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3
src/coding/coding.h
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@ -80,7 +80,8 @@ size_t ps_bytes_to_samples(size_t bytes, int channels);
/* xa_decoder */
void decode_xa(VGMSTREAM * stream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do, int channel);
void init_get_high_nibble(VGMSTREAM * vgmstream);
void xa_init_get_high_nibble(VGMSTREAM * vgmstream);
size_t xa_bytes_to_samples(size_t bytes, int channels, int is_blocked);
/* ea_xa_decoder */
void decode_ea_xa(VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do, int channel);

24
src/coding/xa_decoder.c
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@ -20,8 +20,8 @@ static int CLAMP(int value, int Minim, int Maxim)
return value;
}
void init_get_high_nibble(VGMSTREAM *vgmstream) {
vgmstream->get_high_nibble=1;
void xa_init_get_high_nibble(VGMSTREAM *vgmstream) {
vgmstream->xa_get_high_nibble=1;
}
void decode_xa(VGMSTREAM * vgmstream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do, int channel) {
@ -41,18 +41,18 @@ void decode_xa(VGMSTREAM * vgmstream, sample * outbuf, int channelspacing, int32
first_sample = first_sample % 28;
vgmstream->get_high_nibble=!vgmstream->get_high_nibble;
vgmstream->xa_get_high_nibble=!vgmstream->xa_get_high_nibble;
if((first_sample) && (channelspacing==1))
vgmstream->get_high_nibble=!vgmstream->get_high_nibble;
vgmstream->xa_get_high_nibble=!vgmstream->xa_get_high_nibble;
predict_nr = read_8bit(stream->offset+HeadTable[framesin]+vgmstream->get_high_nibble,stream->streamfile) >> 4;
shift_factor = read_8bit(stream->offset+HeadTable[framesin]+vgmstream->get_high_nibble,stream->streamfile) & 0xf;
predict_nr = read_8bit(stream->offset+HeadTable[framesin]+vgmstream->xa_get_high_nibble,stream->streamfile) >> 4;
shift_factor = read_8bit(stream->offset+HeadTable[framesin]+vgmstream->xa_get_high_nibble,stream->streamfile) & 0xf;
for (i=first_sample,sample_count=0; i<first_sample+samples_to_do; i++,sample_count+=channelspacing) {
short sample_byte = (short)read_8bit(stream->offset+16+framesin+(i*4),stream->streamfile);
scale = ((vgmstream->get_high_nibble ?
scale = ((vgmstream->xa_get_high_nibble ?
sample_byte >> 4 :
sample_byte & 0x0f)<<12);
@ -70,3 +70,13 @@ void decode_xa(VGMSTREAM * vgmstream, sample * outbuf, int channelspacing, int32
stream->adpcm_history1_32=hist1;
stream->adpcm_history2_32=hist2;
}
size_t xa_bytes_to_samples(size_t bytes, int channels, int is_blocked) {
if (is_blocked) {
//todo with -0x10 misses the last sector, not sure if bug or feature
return ((bytes - 0x10) / 0x930) * (0x900 - 18*0x10) * 2 / channels;
}
else {
return ((bytes / 0x80)*0xE0) / 2;
}
}

93
src/layout/xa_blocked.c
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@ -4,48 +4,69 @@
/* set up for the block at the given offset */
void xa_block_update(off_t block_offset, VGMSTREAM * vgmstream) {
int i;
int8_t currentChannel=0;
int8_t subAudio=0;
int i;
int8_t currentChannel=0;
int8_t subAudio=0;
init_get_high_nibble(vgmstream);
xa_init_get_high_nibble(vgmstream);
if(vgmstream->samples_into_block!=0)
// don't change this variable in the init process
vgmstream->xa_sector_length+=128;
/* don't change this variable in the init process */
if (vgmstream->samples_into_block != 0)
vgmstream->xa_sector_length += 0x80;
// We get to the end of a sector ?
if(vgmstream->xa_sector_length==(18*128)) {
vgmstream->xa_sector_length=0;
/* XA mode2/form2 sector
* 0x00: sync word
* 0x0c: header = minute, second, sector, mode (always 0x02)
* 0x10: subheader = file, channel (marker), submode flags, xa header
* 0x14: subheader again
* 0x18: data
* 0x918: unused
* 0x92c: EDC/checksum or null
* 0x930: end
*/
// 0x30 of unused bytes/sector :(
if (!vgmstream->xa_headerless) {
block_offset+=0x30;
/* submode flags (typical audio value = 0x64)
* - 7: end of file
* - 6: real time mode
* - 5: sector form (0=form1, 1=form2)
* - 4: trigger (for application)
* - 3: data sector
* - 2: audio sector
* - 1: video sector
* - 0: end of audio
*/
// We get to the end of a sector ?
if (vgmstream->xa_sector_length == (18*0x80)) {
vgmstream->xa_sector_length = 0;
// 0x30 of unused bytes/sector :(
if (!vgmstream->xa_headerless) {
block_offset += 0x30;
begin:
// Search for selected channel & valid audio
currentChannel=read_8bit(block_offset-7,vgmstream->ch[0].streamfile);
subAudio=read_8bit(block_offset-6,vgmstream->ch[0].streamfile);
// Search for selected channel & valid audio
currentChannel = read_8bit(block_offset-0x07,vgmstream->ch[0].streamfile);
subAudio = read_8bit(block_offset-0x06,vgmstream->ch[0].streamfile);
// audio is coded as 0x64
if(!((subAudio==0x64) && (currentChannel==vgmstream->xa_channel))) {
// go to next sector
block_offset+=2352;
if(currentChannel!=-1) goto begin;
}
}
}
// audio is coded as 0x64
if (!((subAudio==0x64) && (currentChannel==vgmstream->xa_channel))) {
// go to next sector
block_offset += 0x930;
if (currentChannel!=-1) goto begin;
}
}
}
vgmstream->current_block_offset = block_offset;
vgmstream->current_block_offset = block_offset;
// Quid : how to stop the current channel ???
// i set up 0 to current_block_size to make vgmstream not playing bad samples
// another way to do it ???
// (as the number of samples can be false in cd-xa due to multi-channels)
vgmstream->current_block_size = (currentChannel==-1?0:112);
vgmstream->next_block_offset = vgmstream->current_block_offset+128;
for (i=0;i<vgmstream->channels;i++) {
vgmstream->ch[i].offset = vgmstream->current_block_offset;
}
// Quid : how to stop the current channel ???
// i set up 0 to current_block_size to make vgmstream not playing bad samples
// another way to do it ???
// (as the number of samples can be false in cd-xa due to multi-channels)
vgmstream->current_block_size = (currentChannel==-1 ? 0 : 0x70);
vgmstream->next_block_offset = vgmstream->current_block_offset + 0x80;
for (i=0;i<vgmstream->channels;i++) {
vgmstream->ch[i].offset = vgmstream->current_block_offset;
}
}

193
src/meta/psx_cdxa.c
View File

@ -1,135 +1,118 @@
#include "meta.h"
#include "../layout/layout.h"
#include "../util.h"
/* Sony PSX CD-XA */
/* No looped file ! */
static off_t init_xa_channel(int *channel,STREAMFILE *streamFile);
static uint8_t AUDIO_CODING_GET_STEREO(uint8_t value) {
return (uint8_t)(value & 3);
}
static uint8_t AUDIO_CODING_GET_FREQ(uint8_t value) {
return (uint8_t)((value >> 2) & 3);
}
#include "../coding/coding.h"
/* CD-XA - from Sony PS1 CDs */
VGMSTREAM * init_vgmstream_cdxa(STREAMFILE *streamFile) {
VGMSTREAM * vgmstream = NULL;
char filename[PATH_LIMIT];
off_t start_offset;
int loop_flag = 0, channel_count, sample_rate;
int xa_channel=0;
int is_blocked;
size_t file_size = get_streamfile_size(streamFile);
int channel_count;
int headerless=0;
int xa_channel=0;
uint8_t bCoding;
off_t start_offset;
/* check extension (.xa: common, .str: sometimes used) */
if ( !check_extensions(streamFile,"xa,str") )
goto fail;
int i;
/* Proper XA comes in raw (BIN 2352 mode2/form2) CD sectors, that contain XA subheaders.
* This also has minimal support for headerless (ISO 2048 mode1/data) mode. */
/* check extension, case insensitive */
streamFile->get_name(streamFile,filename,sizeof(filename));
if (strcasecmp("xa",filename_extension(filename))) goto fail;
/* check RIFF header = raw (optional, added when ripping and not part of the CD data) */
if (read_32bitBE(0x00,streamFile) == 0x52494646 && /* "RIFF" */
read_32bitBE(0x08,streamFile) == 0x43445841 && /* "CDXA" */
read_32bitBE(0x0C,streamFile) == 0x666D7420) { /* "fmt " */
is_blocked = 1;
start_offset = 0x2c; /* after "data" (chunk size tends to be a bit off) */
}
else {
/* sector sync word = raw */
if (read_32bitBE(0x00,streamFile) == 0x00FFFFFF &&
read_32bitBE(0x04,streamFile) == 0xFFFFFFFF &&
read_32bitBE(0x08,streamFile) == 0xFFFFFF00) {
is_blocked = 1;
start_offset = 0x00;
}
else { /* headerless */
is_blocked = 0;
start_offset = 0x00;
}
}
/* check RIFF Header */
if (!((read_32bitBE(0x00,streamFile) == 0x52494646) &&
(read_32bitBE(0x08,streamFile) == 0x43445841) &&
(read_32bitBE(0x0C,streamFile) == 0x666D7420)))
headerless=1;
/* test first block (except when RIFF) */
if (start_offset == 0) {
int i, j;
/* don't misdetect Reflections' XA ("XA30" / "04SW") */
if (read_32bitBE(0x00,streamFile) == 0x58413330 || read_32bitBE(0x00,streamFile) == 0x30345357) goto fail;
/* don't misdetect Maxis XA ("XAI\0" / "XAJ\0") */
if (read_32bitBE(0x00,streamFile) == 0x58414900 || read_32bitBE(0x00,streamFile) == 0x58414A00) goto fail;
/* 0x80 frames for 1 sector (max ~0x800 for ISO mode) */
for (i = 0; i < (0x800/0x80); i++) {
off_t test_offset = start_offset + (is_blocked ? 0x18 : 0x00) + 0x80*i;
/* First init to have the correct info of the channel */
if (!headerless) {
start_offset=init_xa_channel(&xa_channel,streamFile);
/* ADPCM predictors should be 0..3 index */
for (j = 0; j < 16; j++) {
uint8_t header = read_8bit(test_offset + i, streamFile);
if (((header >> 4) & 0xF) > 3)
goto fail;
}
}
}
/* No sound ? */
if(start_offset==0)
goto fail;
bCoding = read_8bit(start_offset-5,streamFile);
/* data is ok: parse header */
if (is_blocked) {
uint8_t xa_header;
switch (AUDIO_CODING_GET_STEREO(bCoding)) {
case 0: channel_count = 1; break;
case 1: channel_count = 2; break;
default: channel_count = 0; break;
}
/* parse 0x18 sector header (also see xa_blocked.c) */
xa_channel = read_8bit(start_offset + 0x11,streamFile);
xa_header = read_8bit(start_offset + 0x13,streamFile);
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channel_count,0);
if (!vgmstream) goto fail;
switch((xa_header >> 0) & 3) { /* 0..1: stereo */
case 0: channel_count = 1; break;
case 1: channel_count = 2; break;
default: goto fail;
}
switch((xa_header >> 2) & 3) { /* 2..3: sample rate */
case 0: sample_rate = 37800; break;
case 1: sample_rate = 18900; break;
default: goto fail;
}
VGM_ASSERT(((xa_header >> 4) & 3) == 1, /* 4..5: bits per sample (0=4, 1=8) */
"XA: 8 bits per sample mode found\n"); /* spec only? */
/* 6: emphasis (applies a filter but apparently not used by games)
* XA is also filtered when resampled to 44100 during output, differently from PS-ADPCM */
/* 7: reserved */
}
else {
/* headerless, probably will go wrong */
channel_count = 2;
sample_rate = 44100; /* not 37800? */
}
/* fill in the vital statistics */
vgmstream->channels = channel_count;
vgmstream->xa_channel = xa_channel;
switch (AUDIO_CODING_GET_FREQ(bCoding)) {
case 0: vgmstream->sample_rate = 37800; break;
case 1: vgmstream->sample_rate = 18900; break;
default: vgmstream->sample_rate = 0; break;
}
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channel_count,loop_flag);
if (!vgmstream) goto fail;
/* Check for Compression Scheme */
vgmstream->num_samples = (int32_t)((((get_streamfile_size(streamFile) - 0x3C)/2352)*0x1F80)/(2*channel_count));
} else
{
channel_count=2;
vgmstream = allocate_vgmstream(2,0);
if (!vgmstream) goto fail;
vgmstream->sample_rate = sample_rate;
vgmstream->num_samples = xa_bytes_to_samples(file_size - start_offset, channel_count, is_blocked);
vgmstream->xa_headerless = !is_blocked;
vgmstream->xa_channel = xa_channel;
vgmstream->xa_headerless=1;
vgmstream->sample_rate=44100;
vgmstream->channels=2;
vgmstream->num_samples = (int32_t)(((get_streamfile_size(streamFile)/ 0x80)*0xE0)/2);
start_offset=0;
}
vgmstream->coding_type = coding_XA;
vgmstream->coding_type = coding_XA;
vgmstream->layout_type = layout_xa_blocked;
vgmstream->meta_type = meta_PSX_XA;
/* open the file for reading by each channel */
{
STREAMFILE *chstreamfile;
chstreamfile = streamFile->open(streamFile,filename,2352);
if (is_blocked)
start_offset += 0x18; /* move to first frame (hack for xa_blocked.c) */
if (!chstreamfile) goto fail;
/* open the file for reading */
if ( !vgmstream_open_stream(vgmstream, streamFile, start_offset) )
goto fail;
for (i=0;i<channel_count;i++) {
vgmstream->ch[i].streamfile = chstreamfile;
}
}
xa_block_update(start_offset,vgmstream);
xa_block_update(start_offset,vgmstream);
return vgmstream;
return vgmstream;
/* clean up anything we may have opened */
fail:
if (vgmstream) close_vgmstream(vgmstream);
return NULL;
}
off_t init_xa_channel(int* channel,STREAMFILE* streamFile) {
off_t block_offset=0x44;
size_t filelength=get_streamfile_size(streamFile);
int8_t currentChannel;
// 0 can't be a correct value
if(block_offset>=(off_t)filelength)
return 0;
currentChannel=read_8bit(block_offset-7,streamFile);
//subAudio=read_8bit(block_offset-6,streamFile);
*channel=currentChannel;
//if (!((currentChannel==channel) && (subAudio==0x64))) {
// block_offset+=2352;
// goto begin;
//}
return block_offset;
}

16
src/vgmstream.h
View File

@ -715,10 +715,10 @@ typedef struct {
layout_t layout_type; /* type of layout for data */
meta_t meta_type; /* how we know the metadata */
/* streams (info only) */
int num_streams; /* for multi-stream formats (0=not set/one, 1=one stream) */
int stream_index; /* current stream */
char stream_name[STREAM_NAME_SIZE]; /* name of the current stream, if the file stores it and it's filled */
/* subsongs */
int num_streams; /* for multi-stream formats (0=not set/one stream, 1=one stream) */
int stream_index; /* selected stream (also 1-based) */
char stream_name[STREAM_NAME_SIZE]; /* name of the current stream (info), if the file stores it and it's filled */
/* looping */
int loop_flag; /* is this stream looped? */
@ -766,12 +766,10 @@ typedef struct {
uint8_t xa_channel; /* XA ADPCM: selected channel */
int32_t xa_sector_length; /* XA ADPCM: XA block */
uint8_t xa_headerless; /* XA ADPCM: headerless XA block */
uint8_t xa_headerless; /* XA ADPCM: headerless XA */
int8_t xa_get_high_nibble; /* XA ADPCM: mono/stereo nibble selection (XA state could be simplified) */
int8_t get_high_nibble; /* ADPCM: which nibble (XA, IMA, EA) */
uint8_t ea_big_endian; /* EA ADPCM stuff */
uint8_t ea_platform;
uint8_t ea_platform; /* EA block */
int32_t ws_output_size; /* WS ADPCM: output bytes for this block */