medfall

commit ee3c5e65b80b8c641193d23968ed6b607b95d214
parent 8724d6d2f2b8e32fc9b9baf767c1e231cda91994
Author: Michael Savage <mikejsavage@gmail.com>
Date:   Sat Oct 31 23:25:04 +0000

Add test Linux audio stub/test

Diffstat:
linux_audio.cc
 | 
74
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 74 insertions(+), 0 deletions(-)
diff --git a/linux_audio.cc b/linux_audio.cc
@@ -0,0 +1,74 @@
+#include <assert.h>
+#include <alsa/asoundlib.h>
+#include <math.h>
+
+#include "intrinsics.h"
+#include "wave.h"
+
+#define FRAMES 1024
+
+short buffer[ FRAMES ][ 2 ]; // stereo
+
+int milliseconds( int ms ) {
+	return ms * 1000;
+}
+
+u8 memory[ megabytes( 64 ) ];
+int main( int argc, char ** argv ) {
+	MemoryArena arena;
+	memarena_init( &arena, memory, sizeof( memory ) );
+
+	u8 * wave = file_get_contents( "01 - Abandon.wav" );
+	Sound sound;
+	bool ok = wave_decode( &arena, wave, &sound );
+	assert( ok );
+
+	const char * pcmname = argc == 2 ? argv[ 1 ] : "default";
+
+	snd_pcm_t * pcm;
+	const int ok_open = snd_pcm_open( &pcm, pcmname, SND_PCM_STREAM_PLAYBACK, 0 );
+
+	if( ok_open != 0 ) {
+		printf( "nope: %s\n", snd_strerror( ok_open ) );
+		return 1;
+	}
+
+	const int channels = sound.num_channels;
+	const int sample_rate = sound.sample_rate;
+	const int latency = milliseconds( 10 );
+
+	const int ok_set_params = snd_pcm_set_params( pcm,
+		SND_PCM_FORMAT_S16_LE, SND_PCM_ACCESS_RW_NONINTERLEAVED,
+		channels, sample_rate, 1, latency );
+
+	if( ok_set_params != 0 ) {
+		printf( "nope: %s\n", snd_strerror( ok_open ) );
+		return 1;
+	}
+
+	// snd_output_t *log;
+	// if (snd_output_stdio_attach(&log, stderr, 0) >= 0) {
+	// 	snd_pcm_dump(pcm, log); snd_output_close(log); }
+
+	// for( int i = 0; i < FRAMES; i++ ) {
+	// 	buffer[i][0] = 16384*sin(2*M_PI*i/128) + 6553*sin(4*M_PI*i/128);
+	// 	buffer[i][1] = 0;
+	// }
+
+	for( u32 i = 0; i < sound.num_samples; ) {
+		s16 * channels[ 2 ] = { sound.samples + i, sound.samples + sound.num_samples + i };
+
+		snd_pcm_sframes_t written = snd_pcm_writen( pcm, ( void ** ) channels, sound.num_samples - i );
+		if( written <= 0 ) {
+			snd_pcm_recover( pcm, written, 1 );
+			printf( "recovering: %s\n", snd_strerror( written ) );
+		}
+		else {
+			i += written;
+		}
+	}
+
+	assert( snd_pcm_close( pcm ) == 0 );
+
+	return 0;
+}