SAMPLE *alogg_create_sample_from_ogg(ALOGG_OGG *ogg) {
SAMPLE *sample;
char *data;
int i, sample_len_bytes, sample_len, size_done, done;
/* first we need to calculate the len of the sample in bytes */
sample_len = ov_pcm_total(&(ogg->vf), -1);
sample_len_bytes = (sample_len * (ogg->stereo ? 2 : 1)) * 2; /* / 2 = 16 bits */
/* create the sample */
sample = create_sample(16, ogg->stereo, ogg->freq, sample_len);
/* return NULL if we were not able to allocate the memory for it */
if (sample == NULL)
return NULL;
/* we need to stop and rewind the ogg */
alogg_stop_ogg(ogg);
alogg_rewind_ogg(ogg);
/* set our pointer */
data = (char *)sample->data;
/* clear the sample buffer in unsigned format */
{
int i;
unsigned short *j = (unsigned short *)data;
for (i = 0; i < (sample_len_bytes / 2); i++, j++)
*j = 0x8000;
}
/* decode */
done = FALSE;
size_done = 0;
for (i = sample_len_bytes; !done && (i > 0); i -= size_done) {
/* decode */
size_done = ov_read(&(ogg->vf), data, i, 0, 2, 0, &(ogg->current_section));
/* check if the decoding was not successful */
if (size_done < 0) {
if (size_done == OV_HOLE)
size_done = 0;
else {
alogg_rewind_ogg(ogg);
destroy_sample(sample);
return NULL;
}
}
else if (size_done == 0)
done = TRUE;
data += size_done;
}
alogg_rewind_ogg(ogg);
return sample;
}
void restart()
{
if (tune != NULL) {
alogg_stop_ogg(tune);
alogg_rewind_ogg(tune);
alogg_play_ogg(tune, 16384, vol, panning);
last_ms_offs = 0;
last_but_one = 0;
last_but_one_but_one = 0;
done = 0;
poll();
}
}
void MYSTATICOGG::restart()
{
if (tune != NULL) {
alogg_stop_ogg(tune);
alogg_rewind_ogg(tune);
alogg_play_ogg(tune, 16384, vol, panning);
last_ms_offs = 0;
last_but_one = 0;
last_but_one_but_one = 0;
done = 0;
if (!psp_audio_multithreaded)
poll();
}
}
int alogg_poll_ogg(ALOGG_OGG *ogg) {
void *audiobuf;
char *audiobuf_p;
int i, size_done;
/* continue only if we are playing it */
if (!alogg_is_playing_ogg(ogg))
return ALOGG_POLL_NOTPLAYING;
/* get the audio stream buffer and only continue if we need to fill it */
audiobuf = get_audio_stream_buffer(ogg->audiostream);
if (audiobuf == NULL)
return ALOGG_OK;
/* clear the buffer with 16bit unsigned data */
{
int i;
unsigned short *j = (unsigned short *)audiobuf;
for (i = 0; i < (ogg->audiostream_buffer_len / 2); i++, j++)
*j = 0x8000;
}
/* if we need to fill it, but we were just waiting for it to finish */
if (!ogg->loop) {
if (ogg->wait_for_audio_stop > 0) {
free_audio_stream_buffer(ogg->audiostream);
if (--ogg->wait_for_audio_stop == 0) {
/* stop it */
//rest(500);
alogg_stop_ogg(ogg);
return ALOGG_POLL_PLAYJUSTFINISHED;
}
else
return ALOGG_OK;
}
}
audiobuf_p = (char *)audiobuf;
size_done = 0;
for (i = ogg->audiostream_buffer_len; i > 0; i -= size_done) {
/* decode */
size_done = ov_read(&(ogg->vf), audiobuf_p, i, 0, 2, 0, &(ogg->current_section));
/* check if the decoding was not successful */
if (size_done < 0) {
if (size_done == OV_HOLE)
size_done = 0;
else {
free_audio_stream_buffer(ogg->audiostream);
alogg_stop_ogg(ogg);
alogg_rewind_ogg(ogg);
return ALOGG_POLL_FRAMECORRUPT;
}
}
else if (size_done == 0) {
/* we have reached the end */
alogg_rewind_ogg(ogg);
if (!ogg->loop) {
free_audio_stream_buffer(ogg->audiostream);
ogg->wait_for_audio_stop = 2;
return ALOGG_OK;
}
}
audiobuf_p += size_done;
}
/* lock the buffer */
free_audio_stream_buffer(ogg->audiostream);
return ALOGG_OK;
}
int alogg_poll_ogg_ts(ALOGG_OGG *ogg) {
void *audiobuf;
char *audiobuf_p;
unsigned short *audiobuf_sp;
int i, size_done, finished = 0;
/* continue only if we are playing it */
if (!alogg_is_playing_ogg(ogg))
return ALOGG_POLL_NOTPLAYING;
/* get the audio stream buffer and only continue if we need to fill it */
audiobuf = get_audio_stream_buffer(ogg->audiostream);
if (audiobuf == NULL)
return ALOGG_OK;
/* clear the buffer with 16bit unsigned data */
{
int i;
unsigned short *j = (unsigned short *)audiobuf;
for (i = 0; i < (ogg->audiostream_buffer_len / 2); i++, j++)
*j = 0x8000;
}
/* if we need to fill it, but we were just waiting for it to finish */
if (!ogg->loop) {
if (ogg->wait_for_audio_stop > 0) {
free_audio_stream_buffer(ogg->audiostream);
if (--ogg->wait_for_audio_stop == 0) {
/* stop it */
alogg_stop_ogg(ogg);
return ALOGG_POLL_PLAYJUSTFINISHED;
}
else
return ALOGG_OK;
}
}
audiobuf_sp = (unsigned short *)audiobuf;
while (!finished && rubberband_available(ogg->time_stretch_state) < ogg->time_stretch_buffer_samples) {
/* reset these each iteration so we don't overrun the buffer */
audiobuf_p = (char *)audiobuf;
size_done = 0;
/* read samples from Ogg Vorbis file */
for (i = ogg->audiostream_buffer_len; i > 0; i -= size_done) {
/* decode */
size_done = ov_read(&(ogg->vf), audiobuf_p, i, alogg_endianess, 2, 0, &(ogg->current_section));
/* check if the decoding was not successful */
if (size_done < 0) {
if (size_done == OV_HOLE)
size_done = 0;
else {
free_audio_stream_buffer(ogg->audiostream);
alogg_stop_ogg(ogg);
alogg_rewind_ogg(ogg);
return ALOGG_POLL_FRAMECORRUPT;
}
}
else if (size_done == 0) {
alogg_rewind_ogg(ogg);
ogg->wait_for_audio_stop = 2;
finished = 1;
break; // playback finished so get out of loop
}
audiobuf_p += size_done;
}
/* process samples with Rubber Band */
if (ogg->stereo) {
for (i = 0; i < ogg->time_stretch_buffer_samples; i++) {
ogg->time_stretch_buffer[0][i] = (float)((long)audiobuf_sp[i * 2] - 0x8000) / (float)0x8000; //Convert sample to signed floating point format
ogg->time_stretch_buffer[1][i] = (float)((long)audiobuf_sp[i * 2 + 1] - 0x8000) / (float)0x8000; //Repeat for the other channel's sample
}
}
else {
for (i = 0; i < ogg->time_stretch_buffer_samples; i++) {
ogg->time_stretch_buffer[0][i] = (float)((long)audiobuf_sp[i] - 0x8000) / (float)0x8000; //Convert sample to signed floating point format
}
}
rubberband_process(ogg->time_stretch_state, (const float **)ogg->time_stretch_buffer, ogg->time_stretch_buffer_samples, 0);
}
/* retrieve audio from rubberband and put it into stream buffer */
size_done = rubberband_retrieve(ogg->time_stretch_state, ogg->time_stretch_buffer, ogg->time_stretch_buffer_samples);
if (ogg->stereo) {
for (i = 0; i < size_done; i++) {
if(ogg->time_stretch_buffer[0][i] > 1.0)
{
audiobuf_sp[i * 2] = 0xFFFF;
}
else if(ogg->time_stretch_buffer[0][i] < -1.0)
{
audiobuf_sp[i * 2] = 0;
}
else
{
audiobuf_sp[i * 2] = (ogg->time_stretch_buffer[0][i] * (float)0x8000) + (float)0x8000; //Convert sample back to unsigned integer format
}
if(ogg->time_stretch_buffer[1][i] > 1.0)
{
audiobuf_sp[i * 2 + 1] = 0xFFFF;
}
else if(ogg->time_stretch_buffer[1][i] < -1.0)
{
audiobuf_sp[i * 2 + 1] = 0;
}
else
{
audiobuf_sp[i * 2 + 1] = (ogg->time_stretch_buffer[1][i] * (float)0x8000) + (float)0x8000; //Repeat for the other channel's sample
}
}
}
else {
for (i = 0; i < size_done; i++) {
if(ogg->time_stretch_buffer[0][i] > 1.0)
{
audiobuf_sp[i] = 0xFFFF;
}
else if(ogg->time_stretch_buffer[0][i] < -1.0)
{
audiobuf_sp[i] = 0;
}
else
{
audiobuf_sp[i] = (ogg->time_stretch_buffer[0][i] * (float)0x8000) + (float)0x8000; //Convert sample back to unsigned integer format
}
}
}
/* lock the buffer */
if(alogg_buffer_callback)
{
alogg_buffer_callback(audiobuf, ogg->audiostream_buffer_len);
}
free_audio_stream_buffer(ogg->audiostream);
return ALOGG_OK;
}
