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Diffstat (limited to 'drumgizmo/output/alsa/alsa.cc')
| -rw-r--r-- | drumgizmo/output/alsa/alsa.cc | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/drumgizmo/output/alsa/alsa.cc b/drumgizmo/output/alsa/alsa.cc deleted file mode 100644 index 71e0c3d..0000000 --- a/drumgizmo/output/alsa/alsa.cc +++ /dev/null @@ -1,225 +0,0 @@ -/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ -/*************************************************************************** - * audiooutputenginedummy.cc - * - * Sat Apr 30 21:12:02 CEST 2011 - * Copyright 2011 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 <stdlib.h> - -#include <audiotypes.h> -#include <string> - -// Use the newer ALSA API -#define ALSA_PCM_NEW_HW_PARAMS_API - -#include <asoundlib.h> - -#define T(x, msg) if(x < 0) { printf("%s failed: %s\n", msg, snd_strerror(x)); fflush(stdout); return false; } - -#define BUFSZ 40960 - -class Alsa { -public: - Alsa(); - ~Alsa(); - bool init(int channels, char *cnames[]); - void setParm(std::string parm, std::string value); - bool start(); - void stop(); - void pre(size_t size); - void run(int channel, sample_t* data, size_t size); - void post(size_t size); - size_t samplerate(); - -private: - snd_pcm_t *handle{nullptr}; - snd_pcm_hw_params_t *params{nullptr}; - sample_t *data{nullptr}; - size_t channels{0}; - - // Parameters - std::string device; - unsigned int srate{0}; - snd_pcm_uframes_t frames{0}; -}; - -Alsa::Alsa() -{ - handle = NULL; - data = NULL; - - device = "default"; - srate = 44100; - frames = 32; -} - -Alsa::~Alsa() -{ - if(handle) snd_pcm_close(handle); - if(data) free(data); -} - -bool Alsa::init(int channels, char *cnames[]) -{ - int rc; - - rc = snd_pcm_open(&handle, device.c_str(), SND_PCM_STREAM_PLAYBACK, 0); - T(rc, "snd_pcm_open"); - - this->channels = channels; - if(!handle) { - printf("No handle!\n"); - return false; - } - - // 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_RW_INTERLEAVED); - 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); - 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"); - - data = (sample_t*)malloc(sizeof(sample_t) * BUFSZ * channels); - - return true; -} - -void Alsa::setParm(std::string parm, std::string value) -{ - if(parm == "dev") device = value; - if(parm == "frames") frames = atoi(value.c_str()); - if(parm == "srate") srate = atoi(value.c_str()); -} - -bool Alsa::start() -{ - return true; -} - -void Alsa::stop() -{ -} - -void Alsa::pre(size_t size) -{ -} - -void Alsa::run(int channel, sample_t* cdata, size_t csize) -{ - // Write channel data in interleaved buffer. - for(size_t i = 0; i < csize; i++) { - data[i * channels + channel] = cdata[i]; - } -} - -void Alsa::post(size_t size) -{ - // Write the interleaved buffer to the soundcard - snd_pcm_writei(handle, data, size); -} - -size_t Alsa::samplerate() -{ - return srate; -} - -extern "C" { - void *create() - { - return new Alsa(); - } - - void destroy(void *h) - { - Alsa *alsa = (Alsa*)h; - delete alsa; - } - - bool init(void *h, int cs, char *cnames[]) - { - Alsa *alsa = (Alsa*)h; - return alsa->init(cs, cnames); - } - - void setparm(void *h, const char *parm, const char *value) - { - Alsa *alsa = (Alsa*)h; - alsa->setParm(parm, value); - } - - bool start(void *h) - { - Alsa *alsa = (Alsa*)h; - return alsa->start(); - } - - void stop(void *h) - { - Alsa *alsa = (Alsa*)h; - alsa->stop(); - } - - void pre(void *h, size_t s) - { - Alsa *alsa = (Alsa*)h; - alsa->pre(s); - } - - void run(void *h, int ch, sample_t *data, size_t size) - { - Alsa *alsa = (Alsa*)h; - alsa->run(ch, data, size); - } - - void post(void *h, size_t s) - { - Alsa *alsa = (Alsa*)h; - alsa->post(s); - } - - size_t samplerate(void *h) - { - Alsa *alsa = (Alsa*)h; - return alsa->samplerate(); - } -} |