128 lines
3.7 KiB
C
128 lines
3.7 KiB
C
#include "meta.h"
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#include "../util.h"
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/* 28.01.2009 - bxaimc :
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SWAV - found in Asphalt Urban GT & Asphalt Urban GT 2 */
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VGMSTREAM * init_vgmstream_nds_swav(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[PATH_LIMIT];
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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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coding_t coding_type;
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off_t start_offset;
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int bits_per_sample;
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/* check extension, case insensitive */
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streamFile->get_name(streamFile,filename,sizeof(filename));
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if (strcasecmp("swav",filename_extension(filename))) goto fail;
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/* check header */
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if ((uint32_t)read_32bitBE(0x00,streamFile)!=0x53574156) /* SWAV */
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goto fail;
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/* check for DATA section */
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if ((uint32_t)read_32bitBE(0x10,streamFile)!=0x44415441) /* "DATA" */
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goto fail;
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/* check type details */
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codec_number = read_8bit(0x18,streamFile);
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loop_flag = read_8bit(0x19,streamFile);
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channel_count = 1;
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if (get_streamfile_size(streamFile) != read_32bitLE(0x8,streamFile))
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{
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if (get_streamfile_size(streamFile) !=
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(read_32bitLE(0x8,streamFile) - 0x24) * 2 + 0x24)
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goto fail;
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channel_count = 2;
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}
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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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bits_per_sample = 8;
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break;
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case 1:
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coding_type = coding_PCM16LE;
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bits_per_sample = 16;
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break;
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case 2:
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coding_type = coding_IMA_int;
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bits_per_sample = 4;
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break;
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default:
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goto fail;
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}
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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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start_offset = 0x24;
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vgmstream->num_samples =
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(read_32bitLE(0x14,streamFile) - 0x14) * 8 / bits_per_sample;
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vgmstream->sample_rate = (uint16_t)read_16bitLE(0x1A,streamFile);
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if (loop_flag) {
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vgmstream->loop_start_sample =
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(uint16_t)read_16bitLE(0x1E,streamFile) * 32 / bits_per_sample;
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vgmstream->loop_end_sample =
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read_32bitLE(0x20,streamFile) * 32 / bits_per_sample +
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vgmstream->loop_start_sample;
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}
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if (coding_type == coding_IMA_int) {
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/* handle IMA frame header */
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vgmstream->loop_start_sample -= 32 / bits_per_sample;
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vgmstream->loop_end_sample -= 32 / bits_per_sample;
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vgmstream->num_samples -= 32 / bits_per_sample;
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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].adpcm_history1_32 =
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read_16bitLE(start_offset + 0 + 4*i, streamFile);
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vgmstream->ch[i].adpcm_step_index =
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read_16bitLE(start_offset + 2 + 4*i, streamFile);
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}
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}
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start_offset += 4 * channel_count;
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}
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vgmstream->coding_type = coding_type;
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vgmstream->meta_type = meta_NDS_SWAV;
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if (channel_count == 2) {
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 1;
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} else {
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vgmstream->layout_type = layout_none;
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}
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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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STREAMFILE * file;
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file = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
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if (!file) goto fail;
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for (i=0;i<channel_count;i++) {
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vgmstream->ch[i].streamfile = file;
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vgmstream->ch[i].channel_start_offset=
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vgmstream->ch[i].offset=start_offset+
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vgmstream->interleave_block_size*i;
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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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