int osd_update_audio_stream(INT16 *buffer)
{
// if nothing to do, don't do it
if (stream_buffer)
{
int original_bytes = bytes_in_stream_buffer();
int input_bytes = samples_this_frame * stream_format.nBlockAlign;
int final_bytes;
// update the sample adjustment
update_sample_adjustment(original_bytes);
// copy data into the sound buffer
copy_sample_data(buffer, input_bytes);
// check for overflows
final_bytes = bytes_in_stream_buffer();
if (final_bytes < original_bytes)
buffer_overflows++;
}
if( wavptr != NULL )
wav_add_data_16( wavptr, buffer, samples_this_frame * 2 );
// reset underflow/overflow tracking
if (++total_frames == INGORE_UNDERFLOW_FRAMES)
buffer_overflows = buffer_underflows = 0;
// update underflow/overflow logging
#if (DISPLAY_UNDEROVERFLOW || LOG_SOUND)
{
static int prev_overflows, prev_underflows;
if (total_frames > INGORE_UNDERFLOW_FRAMES && (buffer_overflows != prev_overflows || buffer_underflows != prev_underflows))
{
prev_overflows = buffer_overflows;
prev_underflows = buffer_underflows;
#if DISPLAY_UNDEROVERFLOW
popmessage("overflows=%d underflows=%d", buffer_overflows, buffer_underflows);
#endif
#if LOG_SOUND
fprintf(sound_log, "************************ overflows=%d underflows=%d\n", buffer_overflows, buffer_underflows);
#endif
}
}
#endif
// determine the number of samples per frame
samples_per_frame = (double)Machine->sample_rate / (double)Machine->screen[0].refresh;
// compute how many samples to generate next frame
samples_left_over += samples_per_frame;
samples_this_frame = (UINT32)samples_left_over;
samples_left_over -= (double)samples_this_frame;
samples_this_frame += current_adjustment;
// return the samples to play this next frame
return samples_this_frame;
}
void windows_osd_interface::update_audio_stream(const INT16 *buffer, int samples_this_frame)
{
int bytes_this_frame = samples_this_frame * stream_format.nBlockAlign;
DWORD play_position, write_position;
HRESULT result;
// if no sound, there is no buffer
if (stream_buffer == NULL)
return;
#ifdef USE_AUDIO_SYNC
// if we are active, update the sampling frequency
if (audio_sync && machine().video().speed_percent() > 0.0f)
{
IDirectSoundBuffer_SetFrequency(stream_buffer, machine().sample_rate() * machine().video().speed_percent());
}
#endif /* USE_AUDIO_SYNC */
// determine the current play position
result = IDirectSoundBuffer_GetCurrentPosition(stream_buffer, &play_position, &write_position);
if (result == DS_OK)
{
DWORD stream_in;
//DWORD orig_write = write_position;
// normalize the write position so it is always after the play position
if (write_position < play_position)
write_position += stream_buffer_size;
// normalize the stream in position so it is always after the write position
stream_in = stream_buffer_in;
if (stream_in < write_position)
stream_in += stream_buffer_size;
// now we should have, in order:
// <------pp---wp---si--------------->
// if we're between play and write positions, then bump forward, but only in full chunks
while (stream_in < write_position)
{
//printf("Underflow: PP=%d WP=%d(%d) SI=%d(%d) BTF=%d\n", (int)play_position, (int)write_position, (int)orig_write, (int)stream_in, (int)stream_buffer_in, (int)bytes_this_frame);
buffer_underflows++;
stream_in += bytes_this_frame;
}
// if we're going to overlap the play position, just skip this chunk
if (stream_in + bytes_this_frame > play_position + stream_buffer_size)
{
//printf("Overflow: PP=%d WP=%d(%d) SI=%d(%d) BTF=%d\n", (int)play_position, (int)write_position, (int)orig_write, (int)stream_in, (int)stream_buffer_in, (int)bytes_this_frame);
buffer_overflows++;
return;
}
// now we know where to copy; let's do it
stream_buffer_in = stream_in % stream_buffer_size;
copy_sample_data(buffer, bytes_this_frame);
}
}
void osd_update_audio_stream(running_machine *machine, INT16 *buffer, int samples_this_frame)
{
int bytes_this_frame = samples_this_frame * stream_format.nBlockAlign;
DWORD play_position, write_position;
HRESULT result;
// if no sound, there is no buffer
if (stream_buffer == NULL)
return;
// determine the current play position
result = IDirectSoundBuffer_GetCurrentPosition(stream_buffer, &play_position, &write_position);
if (result == DS_OK)
{
DWORD stream_in;
//DWORD orig_write = write_position;
// normalize the write position so it is always after the play position
if (write_position < play_position)
write_position += stream_buffer_size;
// normalize the stream in position so it is always after the write position
stream_in = stream_buffer_in;
if (stream_in < write_position)
stream_in += stream_buffer_size;
// now we should have, in order:
// <------pp---wp---si--------------->
// if we're between play and write positions, then bump forward, but only in full chunks
while (stream_in < write_position)
{
//printf("Underflow: PP=%d WP=%d(%d) SI=%d(%d) BTF=%d\n", (int)play_position, (int)write_position, (int)orig_write, (int)stream_in, (int)stream_buffer_in, (int)bytes_this_frame);
buffer_underflows++;
stream_in += bytes_this_frame;
}
// if we're going to overlap the play position, just skip this chunk
if (stream_in + bytes_this_frame > play_position + stream_buffer_size)
{
//printf("Overflow: PP=%d WP=%d(%d) SI=%d(%d) BTF=%d\n", (int)play_position, (int)write_position, (int)orig_write, (int)stream_in, (int)stream_buffer_in, (int)bytes_this_frame);
buffer_overflows++;
return;
}
// now we know where to copy; let's do it
stream_buffer_in = stream_in % stream_buffer_size;
copy_sample_data(buffer, bytes_this_frame);
}
}
void sdl_osd_interface::update_audio_stream(const INT16 *buffer, int samples_this_frame)
{
// if nothing to do, don't do it
if (machine().sample_rate() != 0 && stream_buffer)
{
int bytes_this_frame = samples_this_frame * sizeof(INT16) * 2;
int play_position, write_position, stream_in;
int orig_write; // used in LOG
play_position = stream_playpos;
write_position = stream_playpos + ((machine().sample_rate() / 50) * sizeof(INT16) * 2);
orig_write = write_position;
if (!stream_in_initialized)
{
stream_in = stream_buffer_in = (write_position + stream_buffer_size) / 2;
if (LOG_SOUND)
{
fprintf(sound_log, "stream_in = %d\n", (int)stream_in);
fprintf(sound_log, "stream_playpos = %d\n", (int)stream_playpos);
fprintf(sound_log, "write_position = %d\n", (int)write_position);
}
// start playing
SDL_PauseAudio(0);
stream_in_initialized = 1;
}
else
{
// normalize the stream in position
stream_in = stream_buffer_in;
if (stream_in < write_position && stream_loop == 1)
stream_in += stream_buffer_size;
// now we should have, in order:
// <------pp---wp---si--------------->
// if we're between play and write positions, then bump forward, but only in full chunks
while (stream_in < write_position)
{
if (LOG_SOUND)
fprintf(sound_log, "Underflow: PP=%d WP=%d(%d) SI=%d(%d) BTF=%d\n", (int)play_position, (int)write_position, (int)orig_write, (int)stream_in, (int)stream_buffer_in, (int)bytes_this_frame);
buffer_underflows++;
stream_in += bytes_this_frame;
}
// if we're going to overlap the play position, just skip this chunk
if (stream_in + bytes_this_frame > play_position + stream_buffer_size)
{
if (LOG_SOUND)
fprintf(sound_log, "Overflow: PP=%d WP=%d(%d) SI=%d(%d) BTF=%d\n", (int)play_position, (int)write_position, (int)orig_write, (int)stream_in, (int)stream_buffer_in, (int)bytes_this_frame);
buffer_overflows++;
return;
}
}
if (stream_in >= stream_buffer_size)
{
stream_in -= stream_buffer_size;
stream_loop = 1;
if (LOG_SOUND)
fprintf(sound_log, "stream_loop set to 1 (stream_in looped)\n");
}
// now we know where to copy; let's do it
stream_buffer_in = stream_in;
copy_sample_data(machine(), buffer, bytes_this_frame);
}
}
