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authorgameblabla2019-10-05 03:04:57 +0200
committergameblabla2019-10-05 03:04:57 +0200
commitd4753076e89d42cdad4a4f1ca4688fad3c56d873 (patch)
treec8641cf282f427d9329db00325e16609acca8663 /shell/audio/oss
parent943821f94b9b2e22315fce876c2e369da7a79bcf (diff)
downloadsnesemu-d4753076e89d42cdad4a4f1ca4688fad3c56d873.tar.gz
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Port the libretro core and make it standalone.
TODO : - Input should use our config file instead. - Missing audio in some games. (Star Ocean, doesn't happen with stock retroarch code. Odd...)
Diffstat (limited to 'shell/audio/oss')
-rw-r--r--shell/audio/oss/sound_output.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/shell/audio/oss/sound_output.c b/shell/audio/oss/sound_output.c
new file mode 100644
index 0000000..2d32b1f
--- /dev/null
+++ b/shell/audio/oss/sound_output.c
@@ -0,0 +1,59 @@
+#include <stdio.h>
+#include <sys/ioctl.h>
+#include <stdint.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/soundcard.h>
+
+#include "sound_output.h"
+
+static int32_t oss_audio_fd = -1;
+
+uint32_t Audio_Init()
+{
+ uint32_t channels = 2;
+ uint32_t format = AFMT_S16_LE;
+ uint32_t tmp = SOUND_OUTPUT_FREQUENCY;
+ int32_t err_ret;
+
+ oss_audio_fd = open("/dev/dsp", O_WRONLY | O_NONBLOCK);
+ if (oss_audio_fd < 0)
+ {
+ printf("Couldn't open /dev/dsp.\n");
+ return 1;
+ }
+
+ err_ret = ioctl(oss_audio_fd, SNDCTL_DSP_SPEED,&tmp);
+ if (err_ret == -1)
+ {
+ printf("Could not set sound frequency\n");
+ return 1;
+ }
+ err_ret = ioctl(oss_audio_fd, SNDCTL_DSP_CHANNELS, &channels);
+ if (err_ret == -1)
+ {
+ printf("Could not set channels\n");
+ return 1;
+ }
+ err_ret = ioctl(oss_audio_fd, SNDCTL_DSP_SETFMT, &format);
+ if (err_ret == -1)
+ {
+ printf("Could not set sound format\n");
+ return 1;
+ }
+ return 0;
+}
+
+void Audio_Write(int16_t* restrict buffer, uint32_t buffer_size)
+{
+ write(oss_audio_fd, buffer, buffer_size * 4 );
+}
+
+void Audio_Close()
+{
+ if (oss_audio_fd >= 0)
+ {
+ close(oss_audio_fd);
+ oss_audio_fd = -1;
+ }
+}