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lsamp.c
259 lines (236 loc) · 7.1 KB
/
lsamp.c
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#include "lsamp.h"
int lsamp_open(lsamp_data **ls, const char *filename, int mode) {
if(mode == LSAMP_READ && access(filename, F_OK)) {
fprintf(stderr, "Error: Could not open file %s\n", filename);
return 0;
}
*ls = (lsamp_data *)malloc(sizeof(lsamp_data));
lsamp_data *lp = *ls;
sqlite3_open(filename, &lp->db);
return 1;
}
void lsamp_close(lsamp_data **ls) {
lsamp_data *lp = *ls;
sqlite3_close(lp->db);
free(*ls);
}
void lsamp_create_table(lsamp_data *ls) {
sqlite3_stmt *ppStmt;
int rc;
rc = sqlite3_prepare_v2(ls->db,
"CREATE TABLE lsamp (keyword STRING UNIQUE, data BLOB);",
-1,
&ppStmt,
NULL);
/* TODO: Error checking */
rc = sqlite3_step(ppStmt);
rc = sqlite3_finalize(ppStmt);
}
int lsamp_open_sfile(lsamp_data *ls, const char *filename) {
ls->sfile = sf_open(filename, SFM_READ , &ls->sfinfo);
if(ls->sfile == NULL) {
fprintf(stderr, "Error: File %s not found.\n", filename);
return LSAMP_NOT_OK;
}else if(ls->sfinfo.channels > 1) {
fprintf(stderr, "Error: Monophonic files only. sound file %s has %d channels.\n",
filename, ls->sfinfo.channels);
return LSAMP_NOT_OK;
}
return LSAMP_OK;
}
int lsamp_close_sfile(lsamp_data *ls){
sf_close(ls->sfile);
return 0;
}
void lsamp_add_file(lsamp_data *ls, const char *filename, const char *keyword) {
sqlite3_stmt *pStmt;
int rc;
int rowid;
int count;
int bufsize = LSBUFSIZE;
int blob_offset = 0;
if(!lsamp_open_sfile(ls, filename)) {
return;
}
rc = sqlite3_prepare_v2(ls->db,
"INSERT INTO lsamp(keyword, data) VALUES(?,ZEROBLOB(?));",
-1,
&pStmt,
NULL);
if(rc) {
fprintf(stderr, "SQL Error: %s\n", sqlite3_errmsg(ls->db));
return;
}
sqlite3_bind_text(pStmt, 1, keyword, -1, SQLITE_STATIC);
sqlite3_bind_int(pStmt, 2, ls->sfinfo.frames * sizeof(LSFLOAT));
rc = sqlite3_step(pStmt);
rc = sqlite3_finalize(pStmt);
sqlite3_blob *pBlob;
rc = sqlite3_blob_open(ls->db, "main", "lsamp", "data",
sqlite3_last_insert_rowid(ls->db), 1, &pBlob);
if(rc) {
fprintf(stderr, "Error opening blob: %s\n", sqlite3_errmsg(ls->db));
return;
}
count = ls->sfinfo.frames;
while(count != 0) {
#ifdef LS_DEBUG
fprintf(stderr, "Reading buffersize %d.\n", bufsize);
fflush(stderr);
#endif
bufsize = sf_read_float(ls->sfile, ls->buf, bufsize);
rc = sqlite3_blob_write(pBlob, ls->buf,
bufsize * sizeof(LSFLOAT), blob_offset * sizeof(LSFLOAT));
#ifdef LS_DEBUG
fprintf(stderr, "%d bytes Written. Writing %d bytes.\n",
blob_offset, bufsize);
fflush(stderr);
#endif
if(rc) {
fprintf(stderr, "SQL Error: %s\n", sqlite3_errmsg(ls->db));
return;
}
blob_offset += bufsize;
count -= bufsize;
}
lsamp_close_sfile(ls);
sqlite3_blob_close(pBlob);
}
void lsamp_remove_entry(lsamp_data *ls, const char *keyword) {
//fprintf(stderr, "This feature has not been implemented yet. Sorry about that\n");
sqlite3_stmt *stmt;
int rc = sqlite3_prepare_v2(ls->db,
"delete from lsamp where keyword=?;",
-1,
&stmt,
NULL);
if(rc) {
fprintf(stderr, "Remove entry error: %s\n", sqlite3_errmsg(ls->db));
sqlite3_finalize(stmt);
return;
}
sqlite3_bind_text(stmt, 1, keyword, -1, SQLITE_STATIC);
sqlite3_step(stmt);
sqlite3_finalize(stmt);
}
void lsamp_extract_entry(lsamp_data *ls, const char *keyword, const char *outfile) {
fprintf(stderr, "This feature has not been implemented yet. Sorry about that\n");
}
void lsamp_len(lsamp_data *ls, int row_id) {
}
int lsamp_rowid(lsamp_data *ls, const char *keyword) {
uint32_t rowid;
int rc;
sqlite3_stmt *stmt;
rc = sqlite3_prepare_v2(ls->db,
"SELECT rowid FROM lsamp WHERE keyword = ?;",
-1,
&stmt,
NULL);
if(rc) {
fprintf(stderr, "SQL Error: %s\n", sqlite3_errmsg(ls->db));
return;
}
sqlite3_bind_text(stmt, 1, keyword, -1, SQLITE_STATIC);
rc = sqlite3_step(stmt);
rowid = sqlite3_column_int(stmt, 0);
#ifdef LS_DEBUG
fprintf(stderr, "The rowid is %d.\n", rowid);
fflush(stderr);
#endif
sqlite3_finalize(stmt);
return rowid;
}
void lsamp_zero_handle(lsamp_handle *lh) {
int i;
for(i = 0; i < lh->bufsize; i++) {
lh->buffer[i] = 0;
}
}
int lsamp_extract_info(lsamp_data *ls, lsamp_handle *lh, uint32_t rowid) {
/* is this function needed, or are we okay with memset?
lsamp_zero_handle(lp);
*/
lh->rowid = rowid;
lh->total_frames = 0;
lh->frmpos = 0;
int rc = sqlite3_blob_open(ls->db, "main", "lsamp", "data",
rowid, 0, &lh->blob);
if(rc) {
fprintf(stderr, "lsamp_open_handle() Error: %s\n", sqlite3_errmsg(ls->db));
return 0;
}
lh->total_frames = sqlite3_blob_bytes(lh->blob) / sizeof(LSFLOAT);
#ifdef LS_DEBUG
fprintf(stderr, "lsamp_open_handle: lh->total_frames is %d.\n", lh->total_frames);
fflush(stderr);
#endif
return 1;
}
int lsamp_open_handle(lsamp_data *ls, lsamp_handle **lh,
uint32_t rowid, uint32_t bufsize) {
int rc;
*lh = (lsamp_handle *)malloc(sizeof(lsamp_handle));
lsamp_handle *lp = *lh;
lp->bufsize = bufsize;
lp->buffer = (LSFLOAT *)malloc(bufsize * sizeof(LSFLOAT));
if(lsamp_extract_info(ls, *lh, rowid)){
return LSAMP_OK;
}else{
return LSAMP_NOT_OK;
}
}
int lsamp_close_handle(lsamp_handle **lh){
lsamp_handle *lp = *lh;
sqlite3_blob_close(lp->blob);
free(lp->buffer);
free(lp);
}
int lsamp_change_sample(lsamp_data *ls, lsamp_handle *lh, uint32_t rowid){
if(lsamp_extract_info(ls, lh, rowid)){
return LSAMP_OK;
}else{
return LSAMP_NOT_OK;
}
}
int lsamp_load_to_buf(lsamp_handle *lh, uint32_t offset){
int bufsize = 0;
int rc;
memset(lh->buffer, 0, lh->bufsize);
if(lh->total_frames - lh->frmpos >= lh->bufsize) {
bufsize = lh->bufsize;
}else{
#ifdef LS_DEBUG
printf("lsamp_load_to_buf: using smaller buffer size.\n");
//fflush(stderr);
#endif
bufsize = lh->total_frames - lh->frmpos;
}
rc = sqlite3_blob_read(lh->blob, lh->buffer, bufsize * sizeof(LSFLOAT), offset * sizeof(LSFLOAT));
if(rc) {
//fprintf(stderr, "lsamp_load_to_buf() Error\n");
printf("lsamp_load_to_buf() Error\n");
return 0;
}
lh->frmpos += bufsize;
return 1;
}
int lsamp_get_bufsize(lsamp_handle *lh) {
return lh->bufsize;
}
LSFLOAT lsamp_get_frame(lsamp_handle *lh, int bufpos) {
if(bufpos > lh->bufsize) {
return 0;
}else{
return lh->buffer[bufpos];
}
}
uint32_t lsamp_get_frmpos(lsamp_handle *lh) {
return lh->frmpos;
}
void lsamp_set_frmpos(lsamp_handle *lh, uint32_t pos) {
lh->frmpos = pos;
}
uint32_t lsamp_get_total_frames(lsamp_handle *lh) {
return lh->total_frames;
}