dingusppc/devices/sound/soundserver_cubeb.cpp
2023-11-15 19:01:54 +01:00

195 lines
4.8 KiB
C++

/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-23 divingkatae and maximum
(theweirdo) spatium
(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <devices/common/dmacore.h>
#include <devices/sound/soundserver.h>
#include <endianswap.h>
#include <loguru.hpp>
#include <cubeb/cubeb.h>
#ifdef _WIN32
#include <objbase.h>
#endif
enum {
SND_SERVER_DOWN = 0,
SND_API_READY,
SND_SERVER_UP,
SND_STREAM_OPENED,
SND_STREAM_CLOSED
};
class SoundServer::Impl {
public:
int status; /* server status */
cubeb *cubeb_ctx;
cubeb_stream *out_stream;
};
SoundServer::SoundServer(): impl(std::make_unique<Impl>())
{
supports_types(HWCompType::SND_SERVER);
this->start();
}
SoundServer::~SoundServer()
{
this->shutdown();
}
int SoundServer::start()
{
int res;
#ifdef _WIN32
CoInitialize(nullptr);
#endif
impl->status = SND_SERVER_DOWN;
res = cubeb_init(&impl->cubeb_ctx, "Dingus sound server", NULL);
if (res != CUBEB_OK) {
LOG_F(ERROR, "Could not initialize Cubeb library");
return -1;
}
LOG_F(INFO, "Connected to backend: %s", cubeb_get_backend_id(impl->cubeb_ctx));
impl->status = SND_API_READY;
return 0;
}
void SoundServer::shutdown()
{
switch (impl->status) {
case SND_STREAM_OPENED:
close_out_stream();
/* fall through */
case SND_STREAM_CLOSED:
/* fall through */
case SND_SERVER_UP:
/* fall through */
case SND_API_READY:
cubeb_destroy(impl->cubeb_ctx);
}
impl->status = SND_SERVER_DOWN;
LOG_F(INFO, "Sound Server shut down.");
}
long sound_out_callback(cubeb_stream *stream, void *user_data,
void const *input_buffer, void *output_buffer,
long req_frames)
{
uint8_t *p_in;
int16_t* in_buf, * out_buf;
uint32_t got_len;
long frames, out_frames;
DmaOutChannel *dma_ch = static_cast<DmaOutChannel*>(user_data); /* C API baby! */
if (!dma_ch->is_active()) {
return 0;
}
out_buf = (int16_t*)output_buffer;
out_frames = 0;
while (req_frames > 0) {
if (!dma_ch->pull_data((uint32_t)req_frames << 2, &got_len, &p_in)) {
frames = got_len >> 2;
in_buf = (int16_t*)p_in;
for (int i = (int)frames; i > 0; i--) {
out_buf[0] = BYTESWAP_16(in_buf[0]);
out_buf[1] = BYTESWAP_16(in_buf[1]);
in_buf += 2;
out_buf += 2;
}
req_frames -= frames;
out_frames += frames;
}
else {
break;
}
}
return out_frames;
}
static void status_callback(cubeb_stream *stream, void *user_data, cubeb_state state)
{
LOG_F(9, "Cubeb status callback fired, status = %d", state);
}
int SoundServer::open_out_stream(uint32_t sample_rate, void *user_data)
{
int res;
uint32_t latency_frames;
cubeb_stream_params params;
params.format = CUBEB_SAMPLE_S16NE;
params.rate = sample_rate;
params.channels = 2;
params.layout = CUBEB_LAYOUT_STEREO;
params.prefs = CUBEB_STREAM_PREF_NONE;
res = cubeb_get_min_latency(impl->cubeb_ctx, &params, &latency_frames);
if (res != CUBEB_OK) {
LOG_F(ERROR, "Could not get minimum latency, error: %d", res);
return -1;
} else {
LOG_F(9, "Minimum sound latency: %d frames", latency_frames);
}
res = cubeb_stream_init(impl->cubeb_ctx, &impl->out_stream, "SndOut stream",
NULL, NULL, NULL, &params, latency_frames,
sound_out_callback, status_callback, user_data);
if (res != CUBEB_OK) {
LOG_F(ERROR, "Could not open sound output stream, error: %d", res);
return -1;
}
LOG_F(9, "Sound output stream opened.");
impl->status = SND_STREAM_OPENED;
return 0;
}
int SoundServer::start_out_stream()
{
return cubeb_stream_start(impl->out_stream);
}
void SoundServer::close_out_stream()
{
cubeb_stream_stop(impl->out_stream);
cubeb_stream_destroy(impl->out_stream);
impl->status = SND_STREAM_CLOSED;
LOG_F(9, "Sound output stream closed.");
}