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fe54a36b93
vgmstream/src/meta/sgxd.c
bnnm fe54a36b93 Rename ps3_sgh_sgb to sgxd (cleanup)
2017-03-18 17:55:35 +01:00

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#include "meta.h"
#include "../util.h"
/* utils to fix AT3 looping */
typedef struct {
int32_t fact_samples;
int32_t loop_start_sample;
int32_t loop_end_sample;
int32_t skip_samples;
} at3_riff_info;
static int get_at3_riff_info(at3_riff_info* info, STREAMFILE *streamFile, int32_t offset);
/* Sony's SGB+SGH / SGD / SGX (variations of the same format)
* PS3: Genji (SGX only), Folklore, Afrika, Tokyo Jungle
* PSP: Brave Story, Sarugetchu Sarusaru Daisakusen, Kurohyo 1/2
*
* Contains header + chunks, usually:
* WAVE: stream(s) header of ADPCM, AC3, ATRAC3plus, etc
* NAME: stream name(s)
* WSUR, WMRK, BUSS: unknown
* RGND, SEQD: unknown (related to SE)
* Then data, containing the original header if applicable (ex. AT3 RIFF).
* The SGXD header has priority over it (ex. some ATRAC3plus files have 48000 while the data RIFF 44100)
*/
VGMSTREAM * init_vgmstream_sgxd(STREAMFILE *streamFile) {
VGMSTREAM * vgmstream = NULL;
STREAMFILE * streamHeader = NULL;
off_t start_offset, data_offset, chunk_offset;
size_t data_size;
int is_sgx, is_sgb;
int loop_flag, channels, type;
int sample_rate, num_samples, loop_start_sample, loop_end_sample;
int target_stream = 0, total_streams;
/* check extension, case insensitive */
if (!check_extensions(streamFile,"sgx,sgd,sgb"))
goto fail;
is_sgx = check_extensions(streamFile,"sgx");
is_sgb = check_extensions(streamFile,"sgb");
//is_sgd = check_extensions(streamFile,"sgd");
/* SGB+SGH: use SGH as header; otherwise use the current file as header */
if (is_sgb) {
streamHeader = open_stream_ext(streamFile, "sgh");
if (!streamHeader) goto fail;
} else {
streamHeader = streamFile;
}
/* SGXD base (size 0x10) */
if (read_32bitBE(0x00,streamHeader) != 0x53475844) /* "SGXD" */
goto fail;
/* 0x04 SGX: full header_size; SGD/SGH: unknown header_size (counting from 0x0/0x8/0x10, varies) */
/* 0x08 SGX: first chunk offset? (0x10); SGD/SGH: full header_size */
/* 0x0c SGX/SGH: full data size with padding; SGD: full data size + 0x80000000 with padding */
if (is_sgb) {
data_offset = 0x00;
} else if ( is_sgx ) {
data_offset = read_32bitLE(0x04,streamHeader);
} else {
data_offset = read_32bitLE(0x08,streamHeader);
}
/* WAVE chunk (size 0x10 + files * 0x38 + optional padding) */
/* 0x04 SGX: unknown; SGD/SGH: chunk length, 0x08 null */
if (is_sgx) { /* position after chunk+size */
if (read_32bitBE(0x10,streamHeader) != 0x57415645) goto fail; /* "WAVE" */
chunk_offset = 0x18;
} else {
if (!find_chunk_le(streamHeader, 0x57415645,0x10,0, &chunk_offset,NULL)) goto fail; /* "WAVE" */
}
/* check multi-streams (usually only SE containers; Puppeteer) */
total_streams = read_32bitLE(chunk_offset+0x04,streamHeader);
if (target_stream == 0) target_stream = 1;
if (target_stream < 0 || target_stream > total_streams || total_streams < 1) goto fail;
/* read stream header */
{
off_t stream_offset;
chunk_offset += 0x08 + 0x38 * (target_stream-1); /* position in target header*/
/* 0x00 ? (00/01/02) */
/* 0x04 sometimes global offset to wave_name */
type = read_8bit(chunk_offset+0x08,streamHeader);
channels = read_8bit(chunk_offset+0x09,streamHeader);
/* 0x0a null */
sample_rate = read_32bitLE(chunk_offset+0x0c,streamHeader);
/* 0x10 info_type: meaning of the next value
* (00=null, 30/40=data size without padding (ADPCM, ATRAC3plus), 80/A0=block size (AC3) */
/* 0x14 info_value (see above) */
/* 0x18 unknown (ex. 0x0008/0010/3307/CC02/etc)x2 */
/* 0x1c null */
num_samples = read_32bitLE(chunk_offset+0x20,streamHeader);
loop_start_sample = read_32bitLE(chunk_offset+0x24,streamHeader);
loop_end_sample = read_32bitLE(chunk_offset+0x28,streamHeader);
data_size = read_32bitLE(chunk_offset+0x2c,streamHeader); /* stream size (without padding) / interleave (for type3) */
if (is_sgx) {
stream_offset = 0x0; /* TODO unknown (not seen multi SGX) */
} else{
stream_offset = read_32bitLE(chunk_offset+0x30,streamHeader);
}
/* 0x34 SGX: unknown; SGD/SGH: stream size (with padding) / interleave */
loop_flag = loop_start_sample!=0xffffffff && loop_end_sample!=0xffffffff;
start_offset = data_offset + stream_offset;
}
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channels,loop_flag);
if (!vgmstream) goto fail;
vgmstream->sample_rate = sample_rate;
vgmstream->num_samples = num_samples;
vgmstream->loop_start_sample = loop_start_sample;
vgmstream->loop_end_sample = loop_end_sample;
vgmstream->num_streams = total_streams;
vgmstream->meta_type = meta_SGXD;
switch (type) {
case 0x03: /* PSX ADPCM */
vgmstream->coding_type = coding_PSX;
vgmstream->layout_type = layout_interleave;
if (is_sgx || is_sgb) {
vgmstream->interleave_block_size = 0x10;
} else { //todo this only seems to happen with SFX
vgmstream->interleave_block_size = data_size;
}
break;
#ifdef VGM_USE_FFMPEG
case 0x04: { /* ATRAC3plus */
at3_riff_info info;
ffmpeg_codec_data *ffmpeg_data = init_ffmpeg_offset(streamFile, start_offset, data_size);
if ( !ffmpeg_data ) goto fail;
vgmstream->codec_data = ffmpeg_data;
vgmstream->coding_type = coding_FFmpeg;
vgmstream->layout_type = layout_none;
/* manually fix looping due to FFmpeg bugs */
if (loop_flag && get_at3_riff_info(&info, streamFile, start_offset)) {
if (vgmstream->num_samples == info.fact_samples) { /* use if looks normal */
/* todo use "skip samples"; for now we just use absolute loop values */
vgmstream->loop_start_sample = info.loop_start_sample;
vgmstream->loop_end_sample = info.loop_end_sample;
vgmstream->num_samples += info.skip_samples; /* to ensure it always reaches loop_end */
}
}
break;
}
#endif
case 0x05: /* Short VAG ADPCM */
vgmstream->coding_type = coding_PSX_cfg;
vgmstream->layout_type = layout_interleave;
vgmstream->interleave_block_size = 0x4;
break;
#ifdef VGM_USE_FFMPEG
case 0x06: { /* AC3 */
ffmpeg_codec_data *ffmpeg_data = init_ffmpeg_offset(streamFile, start_offset, data_size);
if ( !ffmpeg_data ) goto fail;
vgmstream->codec_data = ffmpeg_data;
vgmstream->coding_type = coding_FFmpeg;
vgmstream->layout_type = layout_none;
break;
}
#endif
default:
goto fail;
}
/* open the file for reading */
if (!vgmstream_open_stream(vgmstream,streamFile,start_offset))
goto fail;
if (is_sgb && streamHeader) close_streamfile(streamHeader);
return vgmstream;
fail:
if (is_sgb && streamHeader) close_streamfile(streamHeader);
close_vgmstream(vgmstream);
return NULL;
}
/**
* AT3 RIFF headers have a "skip samples at the beginning" value that the decoder should use,
* and absolute loop values. However the SGXD header loop values assume those samples are skipped.
*
* FFmpeg doesn't support/export this, so we have to manually get the absolute values to fix looping.
*/
static int get_at3_riff_info(at3_riff_info* info, STREAMFILE *streamFile, int32_t offset) {
off_t chunk_offset;
size_t chunk_size;
memset(info, 0, sizeof(at3_riff_info));
if (read_32bitBE(offset+0x0,streamFile)!=0x52494646 /* "RIFF" */
&& read_32bitBE(offset+0x8,streamFile)!=0x57415645 ) /* "WAVE" */
goto fail;
/*"smpl"*/
if (!find_chunk_le(streamFile, 0x736D706C,offset+0xc,0, &chunk_offset,&chunk_size)) goto fail;
if (read_32bitLE(chunk_offset+0x1C, streamFile)==0
|| read_32bitLE(chunk_offset+0x24+0x4, streamFile)!=0 )
goto fail;
info->loop_start_sample = read_32bitLE(chunk_offset+0x1C+0x8+0x8, streamFile);
info->loop_end_sample = read_32bitLE(chunk_offset+0x1C+0x8+0xc,streamFile);
/*"fact"*/
if (!find_chunk_le(streamFile, 0x66616374,offset+0xc,0, &chunk_offset,&chunk_size)) goto fail;
if (chunk_size == 0x8) {
info->fact_samples = read_32bitLE(chunk_offset+0x0, streamFile);
info->skip_samples = read_32bitLE(chunk_offset+0x4, streamFile);
} else if (chunk_size == 0xc) {
info->fact_samples = read_32bitLE(chunk_offset+0x0, streamFile);
info->skip_samples = read_32bitLE(chunk_offset+0x8, streamFile);
} else {
goto fail;
}
/* found */
return 1;
fail:
/* not found */
return 0;
}
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