From cd0e36773992e26985bdec1f7a5341f83fa3e521 Mon Sep 17 00:00:00 2001 From: deva Date: Fri, 15 Jul 2011 13:02:33 +0000 Subject: New input/output plugin architecture. New LV2 plugin. --- src/audiooutputenginealsa.cc | 194 ------------------------------------------- 1 file changed, 194 deletions(-) delete mode 100644 src/audiooutputenginealsa.cc (limited to 'src/audiooutputenginealsa.cc') diff --git a/src/audiooutputenginealsa.cc b/src/audiooutputenginealsa.cc deleted file mode 100644 index 635cf70..0000000 --- a/src/audiooutputenginealsa.cc +++ /dev/null @@ -1,194 +0,0 @@ -/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ -/*************************************************************************** - * audiooutputenginealsa.cc - * - * Thu Sep 16 11:22:52 CEST 2010 - * Copyright 2010 Bent Bisballe Nyeng - * deva@aasimon.org - ****************************************************************************/ - -/* - * This file is part of DrumGizmo. - * - * DrumGizmo 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 2 of the License, or - * (at your option) any later version. - * - * DrumGizmo 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 DrumGizmo; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. - */ -#include "audiooutputenginealsa.h" - -#include "drumgizmo.h" - -#include -#include -#include - -#define T(x, msg) if(x < 0) { printf("%s failed: %s\n", msg, snd_strerror(x)); fflush(stdout); return false; } -#define T_(x, msg) if(x < 0) { printf("%s failed: %s\n", msg, snd_strerror(x)); fflush(stdout); return; } - -AudioOutputEngineAlsa::AudioOutputEngineAlsa() -{ - printf("AudioOutputEngineAlsa\n"); - int rc; - - std::string pcmname = "default"; - - rc = snd_pcm_open(&handle, pcmname.c_str(), - SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK); - T_(rc, "snd_pcm_open"); -} - -AudioOutputEngineAlsa::~AudioOutputEngineAlsa() -{ - printf("~AudioOutputEngineAlsa\n"); - if(handle) snd_pcm_close(handle); -} - -bool AudioOutputEngineAlsa::init(Channels *channels) -{ - this->channels = channels; - - if(!handle) { - printf("No handle!\n"); - return false; - } - - int rc; - unsigned int srate = 44100; - snd_pcm_uframes_t frames = 32; - - // Allocate a hardware parameters object. - snd_pcm_hw_params_alloca(¶ms); - // if(rc < 0) return false; - - // Fill it in with default values. - rc = snd_pcm_hw_params_any(handle, params); - T(rc, "snd_pcm_hw_params_any"); - - rc = snd_pcm_hw_params_set_access(handle, params, - SND_PCM_ACCESS_MMAP_NONINTERLEAVED); - T(rc, "snd_pcm_hw_params_set_access"); - - rc = snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_FLOAT); - T(rc, "snd_pcm_hw_params_set_format"); - - rc = snd_pcm_hw_params_set_channels(handle, params, channels->size()); - T(rc, "snd_pcm_hw_params_set_channels"); - - rc = snd_pcm_hw_params_set_rate_near(handle, params, &srate, 0); - T(rc, "snd_pcm_hw_params_set_rate_near"); - - rc = snd_pcm_hw_params_set_period_size_near(handle, params, &frames, 0); - T(rc, "snd_pcm_hw_params_set_period_size_near"); - - rc = snd_pcm_hw_params(handle, params); - T(rc, "snd_pcm_hw_params"); - - // SW Params: - /* - rc = snd_pcm_sw_params_current(pcm, sw); - rc = snd_pcm_sw_params_set_start_threshold(pcm, sw, ~0U); - rc = snd_pcm_sw_params_set_stop_threshold(pcm, sw, ~0U); - rc = snd_pcm_sw_params(pcm, sw); - rc = snd_pcm_hw_params_get_buffer_size(hw, &buffer_size); - */ - - channels_t nchannels; - rc = snd_pcm_hw_params_get_channels(params, &nchannels); - printf("channels: %d rc: %d\n", nchannels, rc); - T(rc, "snd_pcm_hw_params_get_channels"); - if(nchannels != channels->size()) return false; - - channel_t c = 0; - Channels::iterator i = channels->begin(); - while(i != channels->end()) { - i->num = c; - - i++; - c++; - } - - return true; -} - -#define MICRO 1000000 -void AudioOutputEngineAlsa::run(DrumGizmo *drumgizmo) -{ - int rc; - - snd_pcm_uframes_t nframes; - - while(drumgizmo->isRunning()) { - timeval tim; - gettimeofday(&tim, NULL); - useconds_t t1 = tim.tv_sec * MICRO + tim.tv_usec; - - snd_pcm_uframes_t offset = 0; - - // unsigned int nchannels = 2; - // rc = snd_pcm_hw_params_get_channels(params, &nchannels); - // printf("channels: %d rc: %d\n", nchannels, rc); - // T_(rc, "snd_pcm_hw_params_get_channels"); - nframes = snd_pcm_avail_update(handle); - // printf("%d\n", rc); - // T_(rc, "snd_pcm_avail_update"); - - // rc = snd_pcm_hw_params_get_buffer_size(params, &nframes); - // T_(rc, "nd_pcm_hw_params_get_buffer_size"); - - // nframes = 960; - - const snd_pcm_channel_area_t *areas; - rc = snd_pcm_mmap_begin(handle, &areas, &offset, &nframes); - T_(rc, "snd_pcm_mmap_begin"); - - drumgizmo->pre((size_t)nframes); - - Channels::iterator i = channels->begin(); - while(i != channels->end()) { - const snd_pcm_channel_area_t *a = &areas[i->num]; - sample_t *p = (sample_t*)a->addr + offset; - memset(p, 0, nframes * sizeof(sample_t)); - drumgizmo->getSamples(&(*i), p, (size_t)nframes); - - i++; - } - drumgizmo->post((size_t)nframes); - - switch(snd_pcm_state(handle)) { - case SND_PCM_STATE_PREPARED: - rc = snd_pcm_mmap_commit(handle, offset, nframes); - T_(rc, "snd_pcm_mmap_commit"); - rc = snd_pcm_start(handle); - T_(rc, "snd_pcm_start"); - break; - case SND_PCM_STATE_RUNNING: - rc = snd_pcm_mmap_commit(handle, offset, nframes); - T_(rc, "snd_pcm_mmap_commit"); - break; - default: - break; - } - - useconds_t msec = ((useconds_t)nframes * MICRO)/44100; - - gettimeofday(&tim, NULL); - useconds_t t2 = tim.tv_sec * MICRO + tim.tv_usec; - - struct timespec slp; - slp.tv_sec = 0; - slp.tv_nsec = (msec - (t2 - t1)) * 1000; - - nanosleep(&slp, NULL); - - } -} -- cgit v1.2.3