medfall

Unnamed repository; edit this file 'description' to name the repository.
Log | Files | Refs

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; +}