2008-07-06 20:05:04 +02:00
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#include "meta.h"
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#include "../layout/layout.h"
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#include "../util.h"
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/* Resource Interchange File Format */
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/* only the bare minimum needed to read PCM wavs */
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2008-07-21 07:03:16 +02:00
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/* return milliseconds */
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long parse_marker(unsigned char * marker) {
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long hh,mm,ss,ms;
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if (memcmp("Marker ",marker,7)) return -1;
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if (4 != sscanf((char*)marker+7,"%ld:%ld:%ld.%ld",&hh,&mm,&ss,&ms))
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return -1;
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return ((hh*60+mm)*60+ss)*1000+ms;
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}
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/* loop points have been found hiding here */
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void parse_adtl(off_t adtl_offset, off_t adtl_length, STREAMFILE *streamFile,
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long *loop_start, long *loop_end, int *loop_flag) {
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int loop_start_found = 0;
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int loop_end_found = 0;
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off_t current_chunk = adtl_offset+4;
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while (current_chunk < adtl_offset+adtl_length) {
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uint32_t chunk_type = read_32bitBE(current_chunk,streamFile);
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off_t chunk_size = read_32bitLE(current_chunk+4,streamFile);
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if (current_chunk+8+chunk_size > adtl_offset+adtl_length) return;
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switch(chunk_type) {
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case 0x6c61626c: /* labl */
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{
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unsigned char *labelcontent;
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labelcontent = malloc(chunk_size-4);
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if (!labelcontent) return;
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if (read_streamfile(labelcontent,current_chunk+0xc,
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chunk_size-4,streamFile)!=chunk_size-4) {
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free(labelcontent);
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return;
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}
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switch (read_32bitLE(current_chunk+8,streamFile)) {
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case 1:
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if (!loop_start_found &&
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(*loop_start = parse_marker(labelcontent))>=0)
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{
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loop_start_found = 1;
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}
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break;
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case 2:
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if (!loop_end_found &&
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(*loop_end = parse_marker(labelcontent))>=0)
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{
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loop_end_found = 1;
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}
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break;
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default:
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break;
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}
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free(labelcontent);
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}
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break;
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default:
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break;
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}
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current_chunk += 8 + chunk_size;
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}
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if (loop_start_found && loop_end_found) *loop_flag = 1;
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/* labels don't seem to be consistently ordered */
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if (*loop_start > *loop_end) {
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long temp = *loop_start;
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*loop_start = *loop_end;
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*loop_end = temp;
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}
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}
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2008-07-06 20:05:04 +02:00
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VGMSTREAM * init_vgmstream_riff(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[260];
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off_t file_size = -1;
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int channel_count = 0;
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int sample_count = 0;
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int sample_rate = 0;
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int coding_type = -1;
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off_t start_offset = -1;
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int interleave = -1;
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int loop_flag = 0;
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2008-07-21 07:03:16 +02:00
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long loop_start_ms = -1;
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long loop_end_ms = -1;
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2008-10-08 02:09:11 +02:00
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off_t loop_start_offset = -1;
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off_t loop_end_offset = -1;
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2008-07-06 20:05:04 +02:00
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uint32_t riff_size;
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uint32_t data_size = 0;
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int FormatChunkFound = 0;
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int DataChunkFound = 0;
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/* check extension, case insensitive */
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streamFile->get_name(streamFile,filename,sizeof(filename));
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2008-07-21 23:41:11 +02:00
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if (strcasecmp("wav",filename_extension(filename)) &&
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strcasecmp("lwav",filename_extension(filename))) goto fail;
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2008-07-06 20:05:04 +02:00
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/* check header */
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if ((uint32_t)read_32bitBE(0,streamFile)!=0x52494646) /* "RIFF" */
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goto fail;
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/* check for WAVE form */
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if ((uint32_t)read_32bitBE(8,streamFile)!=0x57415645) /* "WAVE" */
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goto fail;
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riff_size = read_32bitLE(4,streamFile);
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file_size = get_streamfile_size(streamFile);
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/* check for tructated RIFF */
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if (file_size < riff_size+8) goto fail;
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/* read through chunks to verify format and find metadata */
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{
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off_t current_chunk = 0xc; /* start with first chunk */
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while (current_chunk < file_size) {
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uint32_t chunk_type = read_32bitBE(current_chunk,streamFile);
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off_t chunk_size = read_32bitLE(current_chunk+4,streamFile);
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if (current_chunk+8+chunk_size > file_size) goto fail;
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switch(chunk_type) {
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case 0x666d7420: /* "fmt " */
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/* only one per file */
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if (FormatChunkFound) goto fail;
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FormatChunkFound = 1;
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sample_rate = read_32bitLE(current_chunk+0x0c,streamFile);
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channel_count = read_16bitLE(current_chunk+0x0a,streamFile);
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switch (read_16bitLE(current_chunk+0x8,streamFile)) {
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case 1: /* PCM */
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switch (read_16bitLE(current_chunk+0x16,streamFile)) {
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case 16:
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coding_type = coding_PCM16LE;
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interleave = 2;
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break;
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case 8:
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coding_type = coding_PCM8;
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interleave = 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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break;
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default:
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goto fail;
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}
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break;
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case 0x64617461: /* data */
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/* at most one per file */
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if (DataChunkFound) goto fail;
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DataChunkFound = 1;
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start_offset = current_chunk + 8;
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data_size = chunk_size;
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break;
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2008-07-21 07:03:16 +02:00
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case 0x4C495354: /* LIST */
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/* what lurks within?? */
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switch (read_32bitBE(current_chunk + 8, streamFile)) {
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case 0x6164746C: /* adtl */
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/* yay, atdl is its own little world */
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parse_adtl(current_chunk + 8, chunk_size,
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streamFile,
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&loop_start_ms,&loop_end_ms,&loop_flag);
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break;
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default:
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break;
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}
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break;
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2008-10-08 02:09:11 +02:00
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case 0x736D706C: /* smpl */
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/* check loop count */
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if (read_32bitLE(current_chunk+0x24, streamFile)==1)
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{
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/* check loop info */
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if (read_32bitLE(current_chunk+0x2c+4, streamFile)==0)
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{
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loop_flag = 1;
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loop_start_offset =
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read_32bitLE(current_chunk+0x2c+8, streamFile);
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loop_end_offset =
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read_32bitLE(current_chunk+0x2c+0xc,streamFile);
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}
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}
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break;
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2008-07-06 20:05:04 +02:00
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default:
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/* ignorance is bliss */
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break;
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}
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current_chunk += 8+chunk_size;
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}
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}
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if (!FormatChunkFound || !DataChunkFound) goto fail;
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switch (coding_type) {
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case coding_PCM16LE:
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sample_count = data_size/2/channel_count;
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break;
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case coding_PCM8:
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sample_count = data_size/channel_count;
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break;
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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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vgmstream->num_samples = sample_count;
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vgmstream->sample_rate = sample_rate;
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vgmstream->coding_type = coding_type;
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if (channel_count > 1)
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vgmstream->layout_type = layout_interleave;
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else
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vgmstream->layout_type = layout_none;
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vgmstream->interleave_block_size = interleave;
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2008-07-21 07:03:16 +02:00
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if (loop_flag) {
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2008-10-08 02:09:11 +02:00
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if (loop_start_ms >= 0)
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{
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vgmstream->loop_start_sample =
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(long long)loop_start_ms*sample_rate/1000;
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vgmstream->loop_end_sample =
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(long long)loop_end_ms*sample_rate/1000;
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vgmstream->meta_type = meta_RIFF_WAVE_labl_Marker;
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}
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else if (loop_start_offset >= 0)
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{
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vgmstream->loop_start_sample = loop_start_offset;
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vgmstream->loop_end_sample = loop_end_offset;
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vgmstream->meta_type = meta_RIFF_WAVE_smpl;
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}
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2008-07-21 07:03:16 +02:00
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}
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else
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{
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vgmstream->meta_type = meta_RIFF_WAVE;
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}
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2008-07-06 20:05:04 +02:00
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/* open the file, set up each channel */
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{
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int i;
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vgmstream->ch[0].streamfile = streamFile->open(streamFile,filename,
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STREAMFILE_DEFAULT_BUFFER_SIZE);
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if (!vgmstream->ch[0].streamfile) goto fail;
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for (i=0;i<channel_count;i++) {
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vgmstream->ch[i].streamfile = vgmstream->ch[0].streamfile;
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vgmstream->ch[i].offset = vgmstream->ch[i].channel_start_offset =
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start_offset+i*interleave;
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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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