static struct ast_frame *mp3_read(struct ast_filestream *s, int *whennext)
{
struct mp3_private *p = s->_private;
int delay =0;
int save=0;
/* Pre-populate the buffer that holds audio to be returned (dbuf) */
if (mp3_queue(s)) {
return NULL;
}
if (p->dbuflen) {
/* Read out what's waiting in dbuf */
for (p->buflen = 0; p->buflen < MP3_BUFLEN && p->buflen < p->dbuflen; p->buflen++) {
s->buf[p->buflen + AST_FRIENDLY_OFFSET] = p->dbuf[p->buflen + p->dbufoffset];
}
p->dbufoffset += p->buflen;
p->dbuflen -= p->buflen;
}
if (p->buflen < MP3_BUFLEN) {
/* dbuf didn't have enough, so reset dbuf, fill it back up and continue */
p->dbuflen = p->dbufoffset = 0;
if (mp3_queue(s)) {
return NULL;
}
/* Make sure dbuf has enough to complete this read attempt */
if (p->dbuflen >= (MP3_BUFLEN - p->buflen)) {
for (save = p->buflen; p->buflen < MP3_BUFLEN; p->buflen++) {
s->buf[p->buflen + AST_FRIENDLY_OFFSET] = p->dbuf[(p->buflen - save) + p->dbufoffset];
}
p->dbufoffset += (MP3_BUFLEN - save);
p->dbuflen -= (MP3_BUFLEN - save);
}
}
p->offset += p->buflen;
delay = p->buflen / 2;
AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, p->buflen);
s->fr.samples = delay;
*whennext = delay;
return &s->fr;
}
static struct ast_frame *mp3_read(struct ast_filestream *s, int *whennext)
{
struct mp3_private *p = s->_private;
int delay =0;
int save=0;
/* Send a frame from the file to the appropriate channel */
if(mp3_queue(s))
return NULL;
if(p->dbuflen) {
for(p->buflen=0; p->buflen < MP3_BUFLEN && p->buflen < p->dbuflen; p->buflen++) {
s->buf[p->buflen + AST_FRIENDLY_OFFSET] = p->dbuf[p->buflen+p->dbufoffset];
p->sbufoffset++;
}
p->dbufoffset += p->buflen;
p->dbuflen -= p->buflen;
if(p->buflen < MP3_BUFLEN) {
if(mp3_queue(s))
return NULL;
for(save = p->buflen; p->buflen < MP3_BUFLEN; p->buflen++) {
s->buf[p->buflen + AST_FRIENDLY_OFFSET] = p->dbuf[(p->buflen-save)+p->dbufoffset];
p->sbufoffset++;
}
p->dbufoffset += (MP3_BUFLEN - save);
p->dbuflen -= (MP3_BUFLEN - save);
}
}
p->offset += p->buflen;
delay = p->buflen/2;
s->fr.frametype = AST_FRAME_VOICE;
s->fr.subclass = AST_FORMAT_SLINEAR;
AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, p->buflen);
s->fr.mallocd = 0;
s->fr.samples = delay;
*whennext = delay;
return &s->fr;
}
