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f993fe37de
vgmstream/src/meta/genh.c
bnnm a7982bc743 Remove MPEG internals
2017-02-17 16:48:29 +01:00

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#include "../vgmstream.h"
#include "meta.h"
#include "../coding/coding.h"
#include "../layout/layout.h"
#include "../util.h"
/* GENH is an artificial "generic" header for headerless streams */
VGMSTREAM * init_vgmstream_genh(STREAMFILE *streamFile) {
VGMSTREAM * vgmstream = NULL;
int32_t channel_count;
int32_t interleave;
int32_t sample_rate;
int32_t loop_start;
int32_t loop_end;
int32_t start_offset;
int32_t header_size;
int32_t coef[2];
int32_t coef_splitted[2];
int32_t dsp_interleave_type;
int32_t coef_type;
char filename[PATH_LIMIT];
int coding;
/* check extension, case insensitive */
streamFile->get_name(streamFile,filename,sizeof(filename));
if (strcasecmp("genh",filename_extension(filename))) goto fail;
/* check header magic */
if (read_32bitBE(0x0,streamFile) != 0x47454e48) goto fail;
/* check channel count (needed for ADP/DTK check) */
channel_count = read_32bitLE(0x4,streamFile);
if (channel_count < 1) goto fail;
/* check format */
/* 0 = PSX ADPCM */
/* 1 = XBOX IMA ADPCM */
/* 2 = NGC ADP/DTK ADPCM */
/* 3 = 16bit big endian PCM */
/* 4 = 16bit little endian PCM */
/* 5 = 8bit PCM */
/* 6 = SDX2 */
/* 7 = DVI IMA */
/* 8 = MPEG-1 Layer III, possibly also the MPEG-2 and 2.5 extensions */
/* 9 = IMA */
/* 10 = AICA ADPCM */
/* 11 = MS ADPCM */
/* 12 = NGC DSP */
/* 13 = 8bit unsingned PCM */
/* 14 = PSX ADPCM (bad flagged) */
/* 15 = Microsoft IMA (MS ADPCM) */
/* 16 = 8-bit PCM (unsigned) */
/* 17 = Apple Quicktime 4-bit IMA ADPCM */
switch (read_32bitLE(0x18,streamFile)) {
case 0:
coding = coding_PSX;
break;
case 1:
coding = coding_XBOX;
break;
case 2:
coding = coding_NGC_DTK;
if (channel_count != 2) goto fail;
break;
case 3:
coding = coding_PCM16BE;
break;
case 4:
coding = coding_PCM16LE;
break;
case 5:
coding = coding_PCM8;
break;
case 6:
coding = coding_SDX2;
break;
case 7:
coding = coding_DVI_IMA;
break;
#ifdef VGM_USE_MPEG
case 8:
/* we say MPEG-1 L3 here, but later find out exactly which */
coding = coding_MPEG1_L3;
break;
#endif
case 9:
coding = coding_IMA;
break;
case 10:
coding = coding_AICA;
break;
case 11:
coding = coding_MSADPCM;
break;
case 12:
coding = coding_NGC_DSP;
break;
case 13:
coding = coding_PCM8_U_int;
break;
case 14:
coding = coding_PSX_badflags;
break;
case 15:
coding = coding_MS_IMA;
break;
case 16:
coding = coding_PCM8_U;
break;
case 17:
coding = coding_APPLE_IMA4;
break;
default:
goto fail;
}
start_offset = read_32bitLE(0x1C,streamFile);
header_size = read_32bitLE(0x20,streamFile);
/* HACK to support old genh */
if (header_size == 0) {
start_offset = 0x800;
header_size = 0x800;
}
/* check for audio data start past header end */
if (header_size > start_offset) goto fail;
interleave = read_32bitLE(0x8,streamFile);
sample_rate = read_32bitLE(0xc,streamFile);
loop_start = read_32bitLE(0x10,streamFile);
loop_end = read_32bitLE(0x14,streamFile);
coef[0] = read_32bitLE(0x24,streamFile);
coef[1] = read_32bitLE(0x28,streamFile);
dsp_interleave_type = read_32bitLE(0x2C,streamFile);
/* DSP coefficient variants */
/* bit 0 - split coefs (2 arrays) */
/* bit 1 - little endian coefs */
coef_type = read_32bitLE(0x30,streamFile);
/* when using split coefficients, 2nd array is at: */
coef_splitted[0] = read_32bitLE(0x34,streamFile);
coef_splitted[1] = read_32bitLE(0x38,streamFile);
//if (coding == coding_XBOX && channel_count != 2) goto fail;
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channel_count,(loop_start!=-1));
if (!vgmstream) goto fail;
/* fill in the vital information */
vgmstream->channels = channel_count;
vgmstream->sample_rate = sample_rate;
vgmstream->num_samples = loop_end;
vgmstream->loop_start_sample = loop_start;
vgmstream->loop_end_sample = loop_end;
vgmstream->loop_flag = (loop_start != -1);
switch (coding) {
case coding_PCM8_U_int:
vgmstream->layout_type=layout_none;
break;
case coding_PCM16LE:
case coding_PCM16BE:
case coding_PCM8:
case coding_PCM8_U:
case coding_SDX2:
case coding_PSX:
case coding_PSX_badflags:
case coding_DVI_IMA:
case coding_IMA:
case coding_AICA:
case coding_APPLE_IMA4:
vgmstream->interleave_block_size = interleave;
if (channel_count > 1)
{
if (coding == coding_SDX2) {
coding = coding_SDX2_int;
vgmstream->coding_type = coding_SDX2_int;
}
if(vgmstream->interleave_block_size==0xffffffff)
vgmstream->layout_type=layout_none;
else {
vgmstream->layout_type = layout_interleave;
if(coding==coding_DVI_IMA)
coding=coding_INT_DVI_IMA;
if(coding==coding_IMA)
coding=coding_INT_IMA;
}
} else {
vgmstream->layout_type = layout_none;
}
break;
case coding_MS_IMA:
vgmstream->interleave_block_size = interleave;
vgmstream->layout_type = layout_none;
break;
case coding_MSADPCM:
if (channel_count != 2) goto fail;
vgmstream->interleave_block_size = interleave;
vgmstream->layout_type = layout_none;
break;
case coding_XBOX:
vgmstream->layout_type = layout_none;
break;
case coding_NGC_DTK:
vgmstream->layout_type = layout_none;
break;
case coding_NGC_DSP:
if (dsp_interleave_type == 0) {
vgmstream->layout_type = layout_interleave;
vgmstream->interleave_block_size = interleave;
} else if (dsp_interleave_type == 1) {
vgmstream->layout_type = layout_interleave_byte;
vgmstream->interleave_block_size = interleave;
} else if (dsp_interleave_type == 2) {
vgmstream->layout_type = layout_none;
}
break;
#ifdef VGM_USE_MPEG
case coding_MPEG1_L3:
vgmstream->layout_type = layout_mpeg;
break;
#endif
}
vgmstream->coding_type = coding;
vgmstream->meta_type = meta_GENH;
/* open the file for reading by each channel */
{
int i;
int j;
STREAMFILE * chstreamfile = NULL;
for (i=0;i<channel_count;i++) {
off_t chstart_offset = start_offset;
switch (coding) {
case coding_PSX:
case coding_PSX_badflags:
case coding_PCM16BE:
case coding_PCM16LE:
case coding_SDX2:
case coding_SDX2_int:
case coding_DVI_IMA:
case coding_IMA:
case coding_PCM8:
case coding_PCM8_U:
case coding_PCM8_U_int:
case coding_AICA:
case coding_INT_DVI_IMA:
case coding_INT_IMA:
case coding_APPLE_IMA4:
if (coding == coding_AICA) {
vgmstream->ch[i].adpcm_step_index = 0x7f;
}
if (vgmstream->layout_type == layout_interleave) {
if (interleave >= 512) {
chstreamfile =
streamFile->open(streamFile,filename,interleave);
} else {
if (!chstreamfile)
chstreamfile =
streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
}
chstart_offset =
start_offset+vgmstream->interleave_block_size*i;
} else {
chstreamfile =
streamFile->open(streamFile,filename,
STREAMFILE_DEFAULT_BUFFER_SIZE);
}
break;
case coding_XBOX:
case coding_MSADPCM:
case coding_MS_IMA:
/* xbox's "interleave" is a lie, all channels start at same
* offset */
chstreamfile =
streamFile->open(streamFile,filename,
STREAMFILE_DEFAULT_BUFFER_SIZE);
break;
case coding_NGC_DTK:
if (!chstreamfile)
chstreamfile =
streamFile->open(streamFile,filename,32*0x400);
break;
case coding_NGC_DSP:
if (!chstreamfile)
chstreamfile =
streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
{
int16_t (*read_16bit)(off_t , STREAMFILE*);
if ((coef_type & 2) == 0) {
read_16bit = read_16bitBE;
} else {
read_16bit = read_16bitLE;
}
if ((coef_type & 1) == 0) {
for (j=0;j<16;j++) {
vgmstream->ch[i].adpcm_coef[j] = read_16bit(coef[i]+j*2,streamFile);
}
} else {
for (j=0;j<8;j++) {
vgmstream->ch[i].adpcm_coef[j*2]=read_16bit(coef[i]+j*2,streamFile);
vgmstream->ch[i].adpcm_coef[j*2+1]=read_16bit(coef_splitted[i]+j*2,streamFile);
}
}
}
chstart_offset =start_offset+vgmstream->interleave_block_size*i;
break;
#ifdef VGM_USE_MPEG
case coding_MPEG1_L3:
if (!chstreamfile)
chstreamfile =
streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
break;
#endif
}
if (!chstreamfile) goto fail;
vgmstream->ch[i].streamfile = chstreamfile;
vgmstream->ch[i].channel_start_offset=
vgmstream->ch[i].offset=chstart_offset;
}
}
#ifdef VGM_USE_MPEG
if (coding == coding_MPEG1_L3) {
vgmstream->codec_data = init_mpeg_codec_data(vgmstream->ch[0].streamfile, start_offset, vgmstream->sample_rate, vgmstream->channels, &(vgmstream->coding_type), NULL, NULL);
if (!vgmstream->codec_data) goto fail;
}
#endif
return vgmstream;
/* clean up anything we may have opened */
fail:
if (vgmstream) close_vgmstream(vgmstream);
return NULL;
}
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