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#include "meta.h"
#include "../coding/coding.h"
#include "../util.h"
/* .dsp w/ Cstr header, seen in Star Fox Assault and Donkey Konga */
VGMSTREAM * init_vgmstream_Cstr(STREAMFILE *streamFile) {
VGMSTREAM * vgmstream = NULL;
char filename[260];
int loop_flag;
off_t start_offset;
off_t first_data;
off_t loop_offset;
size_t interleave;
int loop_adjust;
int double_loop_end = 0;
/* check extension, case insensitive */
streamFile->get_name(streamFile,filename,sizeof(filename));
if (strcasecmp("dsp",filename_extension(filename))) goto fail;
/* check header */
if ((uint32_t)read_32bitBE(0,streamFile)!=0x43737472) /* "Cstr" */
goto fail;
#ifdef DEBUG
fprintf(stderr,"header ok\n");
#endif
if (read_8bit(0x1b,streamFile)==1) {
/* mono version, much simpler to handle */
/* Only seen in R Racing Evolution radio sfx */
start_offset = 0x80;
loop_flag = read_16bitBE(0x2c,streamFile);
/* check initial predictor/scale */
if (read_16bitBE(0x5e,streamFile) != (uint8_t)read_8bit(start_offset,streamFile))
goto fail;
/* check type==0 and gain==0 */
if (read_16bitBE(0x2e,streamFile) || read_16bitBE(0x5c,streamFile))
goto fail;
loop_offset = start_offset+read_32bitBE(0x10,streamFile);
if (loop_flag) {
if (read_16bitBE(0x64,streamFile) != (uint8_t)read_8bit(loop_offset,streamFile)) goto fail;
}
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(1,loop_flag);
if (!vgmstream) goto fail;
/* fill in the vital statistics */
vgmstream->sample_rate = read_32bitBE(0x28,streamFile);
vgmstream->num_samples = read_32bitBE(0x20,streamFile);
if (loop_flag) {
vgmstream->loop_start_sample = dsp_nibbles_to_samples(
read_32bitBE(0x30,streamFile));
vgmstream->loop_end_sample = dsp_nibbles_to_samples(
read_32bitBE(0x34,streamFile))+1;
}
vgmstream->coding_type = coding_NGC_DSP;
vgmstream->layout_type = layout_none;
vgmstream->meta_type = meta_DSP_CSTR;
{
int i;
for (i=0;i<16;i++)
vgmstream->ch[0].adpcm_coef[i]=read_16bitBE(0x3c+i*2,streamFile);
}
/* open the file for reading by each channel */
vgmstream->ch[0].streamfile = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
if (!vgmstream->ch[0].streamfile) goto fail;
vgmstream->ch[0].channel_start_offset=
vgmstream->ch[0].offset=
start_offset;
return vgmstream;
} /* end mono */
interleave = read_16bitBE(0x06,streamFile);
start_offset = 0xe0;
first_data = start_offset+read_32bitBE(0x0c,streamFile);
loop_flag = read_16bitBE(0x2c,streamFile);
if (!loop_flag) {
/* Nonlooped tracks seem to follow no discernable pattern
* with where they actually start.
* But! with the magic of initial p/s redundancy, we can guess.
*/
while (first_data<start_offset+0x800 &&
(read_16bitBE(0x5e,streamFile) != (uint8_t)read_8bit(first_data,streamFile) ||
read_16bitBE(0xbe,streamFile) != (uint8_t)read_8bit(first_data+interleave,streamFile)))
first_data+=8;
#ifdef DEBUG
fprintf(stderr,"guessed first_data at %#x\n",first_data);
#endif
}
/* check initial predictor/scale */
if (read_16bitBE(0x5e,streamFile) != (uint8_t)read_8bit(first_data,streamFile))
goto fail;
if (read_16bitBE(0xbe,streamFile) != (uint8_t)read_8bit(first_data+interleave,streamFile))
goto fail;
#ifdef DEBUG
fprintf(stderr,"p/s ok\n");
#endif
/* check type==0 and gain==0 */
if (read_16bitBE(0x2e,streamFile) || read_16bitBE(0x5c,streamFile))
goto fail;
if (read_16bitBE(0x8e,streamFile) || read_16bitBE(0xbc,streamFile))
goto fail;
#ifdef DEBUG
fprintf(stderr,"type & gain ok\n");
#endif
/* check for loop flag agreement */
if (read_16bitBE(0x2c,streamFile) != read_16bitBE(0x8c,streamFile))
goto fail;
#ifdef DEBUG
fprintf(stderr,"loop flags agree\n");
#endif
loop_offset = start_offset+read_32bitBE(0x10,streamFile)*2;
if (loop_flag) {
int loops_ok=0;
/* check loop predictor/scale */
/* some fuzz allowed */
for (loop_adjust=0;loop_adjust>=-0x10;loop_adjust-=8) {
#ifdef DEBUG
fprintf(stderr,"looking for loop p/s at %#x,%#x\n",loop_offset-interleave+loop_adjust,loop_offset+loop_adjust);
#endif
if (read_16bitBE(0x64,streamFile) == (uint8_t)read_8bit(loop_offset-interleave+loop_adjust,streamFile) &&
read_16bitBE(0xc4,streamFile) == (uint8_t)read_8bit(loop_offset+loop_adjust,streamFile)) {
loops_ok=1;
break;
}
}
if (!loops_ok)
for (loop_adjust=interleave;loop_adjust<=interleave+0x10;loop_adjust+=8) {
#ifdef DEBUG
fprintf(stderr,"looking for loop p/s at %#x,%#x\n",loop_offset-interleave+loop_adjust,loop_offset+loop_adjust);
#endif
if (read_16bitBE(0x64,streamFile) == (uint8_t)read_8bit(loop_offset-interleave+loop_adjust,streamFile) &&
read_16bitBE(0xc4,streamFile) == (uint8_t)read_8bit(loop_offset+loop_adjust,streamFile)) {
loops_ok=1;
break;
}
}
if (!loops_ok) goto fail;
#ifdef DEBUG
fprintf(stderr,"loop p/s ok (with %#4x adjust)\n",loop_adjust);
#endif
/* check for agreement */
/* loop end (channel 1 & 2 headers) */
if (read_32bitBE(0x34,streamFile) != read_32bitBE(0x94,streamFile))
goto fail;
/* Mr. Driller oddity */
if (dsp_nibbles_to_samples(read_32bitBE(0x34,streamFile)*2)+1 <= read_32bitBE(0x20,streamFile)) {
#ifdef DEBUG
fprintf(stderr,"loop end <= half total samples, should be doubled\n");
#endif
double_loop_end = 1;
}
/* loop start (Cstr header and channel 1 header) */
if (read_32bitBE(0x30,streamFile) != read_32bitBE(0x10,streamFile)
#if 0
/* this particular glitch only true for SFA, though it
* seems like something similar happens in Donkey Konga */
/* loop start (Cstr, channel 1 & 2 headers) */
|| (read_32bitBE(0x0c,streamFile)+read_32bitLE(0x30,streamFile)) !=
read_32bitBE(0x90,streamFile)
#endif
)
/* alternatively (Donkey Konga) the header loop is 0x0c+0x10 */
if (
/* loop start (Cstr header and channel 1 header) */
read_32bitBE(0x30,streamFile) != read_32bitBE(0x10,streamFile)+
read_32bitBE(0x0c,streamFile))
/* further alternatively (Donkey Konga), if we loop back to
* the very first frame 0x30 might be 0x00000002 (which
* is a *valid* std dsp loop start, imagine that) while 0x10
* is 0x00000000 */
if (!(read_32bitBE(0x30,streamFile) == 2 &&
read_32bitBE(0x10,streamFile) == 0))
/* lest there be too few alternatives, in Mr. Driller we
* find that [0x30] + [0x0c] + 8 = [0x10]*2 */
if (!(double_loop_end &&
read_32bitBE(0x30,streamFile) +
read_32bitBE(0x0c,streamFile) + 8 ==
read_32bitBE(0x10,streamFile)*2))
goto fail;
#ifdef DEBUG
fprintf(stderr,"loop points agree\n");
#endif
}
/* assure that sample counts, sample rates agree */
if (
/* sample count (channel 1 & 2 headers) */
read_32bitBE(0x20,streamFile) != read_32bitBE(0x80,streamFile) ||
/* sample rate (channel 1 & 2 headers) */
read_32bitBE(0x28,streamFile) != read_32bitBE(0x88,streamFile) ||
/* sample count (Cstr header and channel 1 header) */
read_32bitLE(0x14,streamFile) != read_32bitBE(0x20,streamFile) ||
/* sample rate (Cstr header and channel 1 header) */
(uint16_t)read_16bitLE(0x18,streamFile) != read_32bitBE(0x28,streamFile))
goto fail;
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(2,loop_flag);
if (!vgmstream) goto fail;
/* fill in the vital statistics */
vgmstream->sample_rate = read_32bitBE(0x28,streamFile);
/* This is a slight hack to counteract their hack.
* All the data is ofset by first_data so that the loop
* point occurs at a block boundary. However, I always begin decoding
* right after the header, as that is the start of the first block and
* my interleave code relies on starting at the beginning of a block.
* So we decode a few silent samples at the beginning, and here we make up
* for it by lengthening the track by that much.
*/
vgmstream->num_samples = read_32bitBE(0x20,streamFile) +
(first_data-start_offset)/8*14;
if (loop_flag) {
off_t loop_start_bytes = loop_offset-start_offset-interleave;
vgmstream->loop_start_sample = dsp_nibbles_to_samples((loop_start_bytes/(2*interleave)*interleave+loop_start_bytes%(interleave*2))*2);
/*dsp_nibbles_to_samples(loop_start_bytes);*/
/*dsp_nibbles_to_samples(read_32bitBE(0x30,streamFile)*2-inter);*/
vgmstream->loop_end_sample = dsp_nibbles_to_samples(
read_32bitBE(0x34,streamFile))+1;
if (double_loop_end)
vgmstream->loop_end_sample =
dsp_nibbles_to_samples(read_32bitBE(0x34,streamFile)*2)+1;
if (vgmstream->loop_end_sample > vgmstream->num_samples) {
#ifdef DEBUG
fprintf(stderr,"loop_end_sample > num_samples, adjusting\n");
#endif
vgmstream->loop_end_sample = vgmstream->num_samples;
}
}
vgmstream->coding_type = coding_NGC_DSP;
vgmstream->layout_type = layout_interleave;
vgmstream->interleave_block_size = interleave;
vgmstream->meta_type = meta_DSP_CSTR;
{
int i;
for (i=0;i<16;i++)
vgmstream->ch[0].adpcm_coef[i]=read_16bitBE(0x3c+i*2,streamFile);
for (i=0;i<16;i++)
vgmstream->ch[1].adpcm_coef[i]=read_16bitBE(0x9c+i*2,streamFile);
}
#ifdef DEBUG
vgmstream->ch[0].loop_history1 = read_16bitBE(0x66,streamFile);
vgmstream->ch[0].loop_history2 = read_16bitBE(0x68,streamFile);
vgmstream->ch[1].loop_history1 = read_16bitBE(0xc6,streamFile);
vgmstream->ch[1].loop_history2 = read_16bitBE(0xc8,streamFile);
#endif
/* open the file for reading by each channel */
{
int i;
for (i=0;i<2;i++) {
vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,interleave);
if (!vgmstream->ch[i].streamfile) goto fail;
vgmstream->ch[i].channel_start_offset=
vgmstream->ch[i].offset=
start_offset+interleave*i;
}
}
return vgmstream;
/* clean up anything we may have opened */
fail:
if (vgmstream) close_vgmstream(vgmstream);
return NULL;
}
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