mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-25 12:54:51 +01:00
391 lines
11 KiB
C
391 lines
11 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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#include "../util.h"
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/* Wii RWAV, 3DS CWAV */
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struct rwav_data {
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// in
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off_t offset;
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STREAMFILE *streamFile;
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int big_endian;
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int32_t (*read_32bit)(off_t,STREAMFILE*);
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// out
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int version;
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off_t start_offset;
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off_t info_chunk;
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off_t wave_offset;
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};
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static void read_rwav(struct rwav_data * rd)
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{
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off_t chunk_table_offset;
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off_t chunk_table_step;
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off_t info_chunk;
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off_t data_chunk;
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if (rd->big_endian)
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{
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/* "RWAV" */
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if ((uint32_t)read_32bitBE(rd->offset,rd->streamFile)!=0x52574156)
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return;
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/* big endian, version 2 */
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if ((uint32_t)read_32bitBE(rd->offset+4,rd->streamFile)!=0xFEFF0102)
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return;
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chunk_table_offset = rd->offset+0x10;
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chunk_table_step = 8;
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}
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else
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{
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/* "CWAV" */
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if ((uint32_t)read_32bitBE(rd->offset,rd->streamFile)!=0x43574156)
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return;
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/* little endian, version 2 */
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if ((uint32_t)read_32bitBE(rd->offset+4,rd->streamFile)!=0xFFFE4000 ||
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(
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(uint32_t)read_32bitBE(rd->offset+8,rd->streamFile)!=0x00000102 &&
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(uint32_t)read_32bitBE(rd->offset+8,rd->streamFile)!=0x00010102
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)
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)
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return;
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chunk_table_offset = rd->offset+0x18;
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chunk_table_step = 0xc;
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}
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info_chunk = rd->offset+rd->read_32bit(chunk_table_offset,rd->streamFile);
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/* "INFO" */
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if ((uint32_t)read_32bitBE(info_chunk,rd->streamFile)!=0x494e464f)
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return;
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data_chunk = rd->offset+rd->read_32bit(chunk_table_offset+chunk_table_step,rd->streamFile);
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/* "DATA" */
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if ((uint32_t)read_32bitBE(data_chunk,rd->streamFile)!=0x44415441)
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return;
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rd->start_offset = data_chunk + 8;
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rd->info_chunk = info_chunk + 8;
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rd->version = 2;
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rd->wave_offset = info_chunk - 8; // pretend to have a WAVE
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return;
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}
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static void read_rwar(struct rwav_data * rd)
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{
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if ((uint32_t)read_32bitBE(rd->offset,rd->streamFile)!=0x52574152) /* "RWAR" */
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return;
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if ((uint32_t)read_32bitBE(rd->offset+4,rd->streamFile)!=0xFEFF0100) /* version 0 */
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return;
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rd->offset += 0x60;
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read_rwav(rd);
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rd->version = 0;
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return;
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}
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/* RWSD is quite similar to BRSTM, but can contain several streams.
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* Still, some games use it for single streams. We only support the
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* single stream form here */
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VGMSTREAM * init_vgmstream_rwsd(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[PATH_LIMIT];
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coding_t coding_type;
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size_t wave_length;
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int codec_number;
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int channel_count;
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int loop_flag;
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int rwar = 0;
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int rwav = 0;
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struct rwav_data rwav_data;
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size_t stream_size;
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int big_endian = 1;
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int32_t (*read_32bit)(off_t,STREAMFILE*) = NULL;
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int16_t (*read_16bit)(off_t,STREAMFILE*) = NULL;
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const char *ext;
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rwav_data.version = -1;
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rwav_data.start_offset = 0;
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rwav_data.info_chunk = -1;
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rwav_data.wave_offset = -1;
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/* check extension, case insensitive */
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streamFile->get_name(streamFile,filename,sizeof(filename));
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ext = filename_extension(filename);
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if (strcasecmp("rwsd",ext))
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{
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if (strcasecmp("rwar",ext))
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{
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if (strcasecmp("rwav",ext))
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{
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if (strcasecmp("bcwav",ext) && strcasecmp("bms",ext))
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{
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goto fail;
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}
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else
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{
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// cwav, similar to little endian rwav
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rwav = 1;
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big_endian = 0;
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}
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}
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else
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{
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// matched rwav
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rwav = 1;
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}
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}
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else
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{
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// matched rwar
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rwar = 1;
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}
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}
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else
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{
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// match rwsd
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}
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if (big_endian)
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{
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read_16bit = read_16bitBE;
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read_32bit = read_32bitBE;
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}
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else
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{
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read_16bit = read_16bitLE;
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read_32bit = read_32bitLE;
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}
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/* check header */
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if (rwar || rwav)
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{
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rwav_data.offset = 0;
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rwav_data.streamFile = streamFile;
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rwav_data.big_endian = big_endian;
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rwav_data.read_32bit = read_32bit;
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if (rwar) read_rwar(&rwav_data);
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if (rwav) read_rwav(&rwav_data);
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if (rwav_data.wave_offset < 0) goto fail;
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}
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else
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{
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if ((uint32_t)read_32bitBE(0,streamFile)!=0x52575344) /* "RWSD" */
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goto fail;
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switch (read_32bitBE(4,streamFile))
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{
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case 0xFEFF0102:
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/* ideally we would look through the chunk list for a WAVE chunk,
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* but it's always in the same order */
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/* get WAVE offset, check */
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rwav_data.wave_offset = read_32bit(0x18,streamFile);
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if ((uint32_t)read_32bitBE(rwav_data.wave_offset,streamFile)!=0x57415645) /* "WAVE" */
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goto fail;
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/* get WAVE size, check */
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wave_length = read_32bit(0x1c,streamFile);
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if (read_32bit(rwav_data.wave_offset+4,streamFile)!=wave_length)
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goto fail;
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/* check wave count */
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if (read_32bit(rwav_data.wave_offset+8,streamFile) != 1)
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goto fail; /* only support 1 */
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rwav_data.version = 2;
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break;
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case 0xFEFF0103:
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rwav_data.offset = 0xe0;
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rwav_data.streamFile = streamFile;
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rwav_data.big_endian = big_endian;
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rwav_data.read_32bit = read_32bit;
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read_rwar(&rwav_data);
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if (rwav_data.wave_offset < 0) goto fail;
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rwar = 1;
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break;
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default:
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goto fail;
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}
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}
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/* get type details */
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codec_number = read_8bit(rwav_data.wave_offset+0x10,streamFile);
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loop_flag = read_8bit(rwav_data.wave_offset+0x11,streamFile);
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if (big_endian)
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channel_count = read_8bit(rwav_data.wave_offset+0x12,streamFile);
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else
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channel_count = read_32bit(rwav_data.wave_offset+0x24,streamFile);
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switch (codec_number) {
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case 0:
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coding_type = coding_PCM8;
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break;
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case 1:
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if (big_endian)
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coding_type = coding_PCM16BE;
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else
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coding_type = coding_PCM16LE;
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break;
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case 2:
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coding_type = coding_NGC_DSP;
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break;
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case 3:
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coding_type = coding_3DS_IMA;
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break;
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default:
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goto fail;
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}
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if (channel_count < 1) goto fail;
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channel_count,loop_flag);
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if (!vgmstream) goto fail;
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/* fill in the vital statistics */
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if (big_endian)
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{
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vgmstream->num_samples = dsp_nibbles_to_samples(read_32bit(rwav_data.wave_offset+0x1c,streamFile));
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vgmstream->loop_start_sample = dsp_nibbles_to_samples(read_32bit(rwav_data.wave_offset+0x18,streamFile));
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}
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else
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{
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vgmstream->num_samples = read_32bit(rwav_data.wave_offset+0x1c,streamFile);
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vgmstream->loop_start_sample = read_32bit(rwav_data.wave_offset+0x18,streamFile);
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}
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vgmstream->sample_rate = (uint16_t)read_16bit(rwav_data.wave_offset+0x14,streamFile);
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vgmstream->loop_end_sample = vgmstream->num_samples;
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vgmstream->coding_type = coding_type;
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vgmstream->layout_type = layout_none;
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if (rwar)
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vgmstream->meta_type = meta_RWAR;
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else if (rwav)
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{
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if (big_endian) {
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vgmstream->meta_type = meta_RWAV;
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}
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else {
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vgmstream->meta_type = meta_CWAV;
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vgmstream->allow_dual_stereo = 1; /* LEGO 3DS games */
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}
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}
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else
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vgmstream->meta_type = meta_RWSD;
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{
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off_t data_start_offset;
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off_t codec_info_offset;
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int i,j;
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for (j=0;j<vgmstream->channels;j++) {
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if (rwar || rwav)
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{
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if (big_endian)
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{
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/* This is pretty nasty, so an explaination is in order.
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* At 0x10 in the info_chunk is the offset of a table with
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* one entry per channel. Each entry in this table is itself
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* an offset to a set of information for the channel. The
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* first element in the set is the offset into DATA of the
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* channel.
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* The second element is the
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* offset of the codec-specific setup for the channel. */
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off_t channel_info_offset;
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channel_info_offset = rwav_data.info_chunk +
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read_32bit(rwav_data.info_chunk+
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read_32bit(rwav_data.info_chunk+0x10,streamFile)+j*4,
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streamFile);
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data_start_offset = rwav_data.start_offset +
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read_32bit(channel_info_offset+0, streamFile);
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codec_info_offset = rwav_data.info_chunk +
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read_32bit(channel_info_offset+4, streamFile);
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}
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else
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{
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// CWAV uses some relative offsets
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off_t cur_pos = rwav_data.info_chunk + 0x14; // channel count
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cur_pos = cur_pos + read_32bit(cur_pos + 4 + j*8 + 4,streamFile);
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// size is at cur_pos + 4
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data_start_offset = rwav_data.start_offset + read_32bit(cur_pos + 4, streamFile);
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// codec-specific info is at cur_pos + 0xC
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codec_info_offset = cur_pos + read_32bit(cur_pos + 0xC,streamFile);
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}
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vgmstream->ch[j].channel_start_offset=
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vgmstream->ch[j].offset=data_start_offset;
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} else {
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// dummy for RWSD, must be a proper way to work this out
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codec_info_offset=rwav_data.wave_offset+0x6c+j*0x30;
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}
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if (vgmstream->coding_type == coding_NGC_DSP) {
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for (i=0;i<16;i++) {
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vgmstream->ch[j].adpcm_coef[i]=read_16bit(codec_info_offset+i*2,streamFile);
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}
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}
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if (vgmstream->coding_type == coding_3DS_IMA) {
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vgmstream->ch[j].adpcm_history1_16 = read_16bit(codec_info_offset,streamFile);
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vgmstream->ch[j].adpcm_step_index = read_16bit(codec_info_offset+2,streamFile);
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}
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}
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}
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if (rwar || rwav)
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{
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/* */
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}
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else
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{
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if (rwav_data.version == 2)
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rwav_data.start_offset = read_32bit(8,streamFile);
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}
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stream_size = read_32bit(rwav_data.wave_offset+0x50,streamFile);
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/* open the file for reading by each channel */
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{
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int i;
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for (i=0;i<channel_count;i++) {
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vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
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if (!vgmstream->ch[i].streamfile) goto fail;
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if (!(rwar || rwav))
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{
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vgmstream->ch[i].channel_start_offset=
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vgmstream->ch[i].offset=
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rwav_data.start_offset + i*stream_size;
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}
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}
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}
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return vgmstream;
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/* clean up anything we may have opened */
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fail:
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if (vgmstream) close_vgmstream(vgmstream);
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return NULL;
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}
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