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-rw-r--r--src/devices/sound/wave.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/src/devices/sound/wave.c b/src/devices/sound/wave.c
new file mode 100644
index 00000000000..76f9bdda8d6
--- /dev/null
+++ b/src/devices/sound/wave.c
@@ -0,0 +1,110 @@
+// license:BSD-3-Clause
+// copyright-holders:Nathan Woods
+/***************************************************************************
+
+ wave.c
+
+ Code that interfaces
+ Functions to handle loading, creation, recording and playback
+ of wave samples for IO_CASSETTE
+
+ 2010-06-19 - Found that since 0.132, the right channel is badly out of
+ sync on a mono system, causing bad sound. Added code to disable
+ the second channel on a mono system.
+
+
+****************************************************************************/
+
+#include "emu.h"
+#include "wave.h"
+
+#define ALWAYS_PLAY_SOUND 0
+
+
+
+void wave_device::static_set_cassette_tag(device_t &device, const char *cassette_tag)
+{
+ wave_device &wave = downcast<wave_device &>(device);
+ wave.m_cassette_tag = cassette_tag;
+}
+
+const device_type WAVE = &device_creator<wave_device>;
+
+wave_device::wave_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, WAVE, "Wave", tag, owner, clock, "wave", __FILE__),
+ device_sound_interface(mconfig, *this)
+{
+ m_cassette_tag = 0;
+}
+
+//-------------------------------------------------
+// device_config_complete - perform any
+// operations now that the configuration is
+// complete
+//-------------------------------------------------
+
+void wave_device::device_config_complete()
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void wave_device::device_start()
+{
+ speaker_device_iterator spkiter(machine().root_device());
+ int speakers = spkiter.count();
+ if (speakers > 1)
+ machine().sound().stream_alloc(*this, 0, 2, machine().sample_rate());
+ else
+ machine().sound().stream_alloc(*this, 0, 1, machine().sample_rate());
+ m_cass = machine().device<cassette_image_device>(m_cassette_tag);
+}
+
+//-------------------------------------------------
+// sound_stream_update - handle a stream update
+//-------------------------------------------------
+
+void wave_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples)
+{
+ cassette_state state;
+ double time_index;
+ double duration;
+ stream_sample_t *left_buffer = outputs[0];
+ stream_sample_t *right_buffer = NULL;
+ int i;
+
+ speaker_device_iterator spkiter(m_cass->machine().root_device());
+ int speakers = spkiter.count();
+ if (speakers>1)
+ right_buffer = outputs[1];
+
+ state = m_cass->get_state();
+
+ state = (cassette_state)(state & (CASSETTE_MASK_UISTATE | CASSETTE_MASK_MOTOR | CASSETTE_MASK_SPEAKER));
+
+ if (m_cass->exists() && (ALWAYS_PLAY_SOUND || (state == (CASSETTE_PLAY | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED))))
+ {
+ cassette_image *cassette = m_cass->get_image();
+ time_index = m_cass->get_position();
+ duration = ((double) samples) / m_cass->machine().sample_rate();
+
+ cassette_get_samples(cassette, 0, time_index, duration, samples, 2, left_buffer, CASSETTE_WAVEFORM_16BIT);
+ if (speakers > 1)
+ cassette_get_samples(cassette, 1, time_index, duration, samples, 2, right_buffer, CASSETTE_WAVEFORM_16BIT);
+
+ for (i = samples - 1; i >= 0; i--)
+ {
+ left_buffer[i] = ((INT16 *) left_buffer)[i];
+ if (speakers > 1)
+ right_buffer[i] = ((INT16 *) right_buffer)[i];
+ }
+ }
+ else
+ {
+ memset(left_buffer, 0, sizeof(*left_buffer) * samples);
+ if (speakers > 1)
+ memset(right_buffer, 0, sizeof(*right_buffer) * samples);
+ }
+}