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Plugins (portaudio): Add new input plugin from 0.4.x
(based on 0.4.x commit 5a65ba3)
1 parent c321cec commit 3bc4db4

6 files changed

Lines changed: 193 additions & 1 deletion

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‎.github/workflows/linux.yml‎

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@@ -70,7 +70,8 @@ jobs:
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libasound2-dev \
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libsdl1.2-dev \
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libgl1-mesa-dev \
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pkg-config
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pkg-config \
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portaudio19-dev
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- name: Install build dependency Clang ${{ matrix.clang_major_version }}
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if: "${{ contains(matrix.cxx, 'clang') }}"

‎.github/workflows/windows.yml‎

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mingw-w64-x86_64-ninja `
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mingw-w64-x86_64-gstreamer `
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mingw-w64-x86_64-libpng `
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mingw-w64-x86_64-portaudio `
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mingw-w64-x86_64-SDL `
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mingw-w64-x86_64-gettext
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‎libvisual-plugins/CMakeLists.txt‎

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@@ -148,6 +148,7 @@ OPTION(ENABLE_NEBULUS "Build the Nebulus plugin" yes)
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OPTION(ENABLE_MPLAYER "Build the MPlayer input plugin" yes)
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OPTION(ENABLE_NASTYFFT "Build the NastyFFT plugin" yes)
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OPTION(ENABLE_PLAZMA "Build the Plazma plugin" yes)
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OPTION(ENABLE_PORTAUDIO "Build the PortAudio input plugin" yes)
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OPTION(ENABLE_PULSEAUDIO "Build the PulseAudio input plugin" yes)
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OPTION(ENABLE_OINKSIE "Build the Oinksie plugin" yes)
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OPTION(ENABLE_SLIDE "Build the Slide morph plugin" yes)
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ENDIF()
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ENDIF()
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IF(ENABLE_PORTAUDIO)
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PKG_CHECK_MODULES(PORTAUDIO portaudio-2.0 IMPORTED_TARGET)
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IF(NOT PORTAUDIO_FOUND)
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MESSAGE(WARNING "PortAudio not found. The PortAudio input plugin will not be built.")
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SET(ENABLE_PORTAUDIO no)
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ENDIF()
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ENDIF()
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IF(ENABLE_PULSEAUDIO)
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PKG_CHECK_MODULES(PULSE libpulse>=${PULSE_REQUIRED_VERSION} IMPORTED_TARGET)
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IF(NOT PULSE_FOUND)

‎libvisual-plugins/plugins/input/CMakeLists.txt‎

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@@ -14,6 +14,10 @@ IF(ENABLE_MPLAYER)
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ADD_SUBDIRECTORY(mplayer)
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ENDIF()
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IF(ENABLE_PORTAUDIO)
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ADD_SUBDIRECTORY(portaudio)
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ENDIF()
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IF(ENABLE_PULSEAUDIO)
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ADD_SUBDIRECTORY(pulseaudio)
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ENDIF()

‎libvisual-plugins/plugins/input/portaudio/CMakeLists.txt‎

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LV_BUILD_INPUT_PLUGIN(portaudio
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SOURCES input_portaudio.c
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LINK_LIBS PkgConfig::PORTAUDIO
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)

‎libvisual-plugins/plugins/input/portaudio/input_portaudio.c‎

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/* Libvisual-plugins - Standard plugins for libvisual
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*
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* Copyright (C) 2023 Sebastian Pipping <sebastian@pipping.org>
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*
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* Authors: Sebastian Pipping <sebastian@pipping.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdlib.h> // malloc
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#include <libvisual/libvisual.h>
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#include "gettext.h"
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#include <portaudio.h>
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VISUAL_PLUGIN_API_VERSION_VALIDATOR
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#define SAMPLE_RATE 44100
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#define SAMPLE_RATE_TYPE_LV VISUAL_AUDIO_SAMPLE_RATE_44100
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#define CHANNELS 2
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#define CHANNELS_TYPE VISUAL_AUDIO_SAMPLE_CHANNEL_STEREO
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#define SAMPLE_FORMAT_BITS 16
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#define SAMPLE_FORMAT_PA paInt16
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#define SAMPLE_FORMAT_LV VISUAL_AUDIO_SAMPLE_FORMAT_S16
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#define FRAMES 1024
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typedef struct {
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PaStream *stream;
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void * buffer;
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} PortAudioPrivate;
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static int inp_portaudio_init (VisPluginData *plugin);
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static int inp_portaudio_cleanup (VisPluginData *plugin);
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static int inp_portaudio_upload (VisPluginData *plugin, VisAudio *audio);
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const VisPluginInfo *get_plugin_info (int *count)
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{
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static VisInputPlugin input[] = {{
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.upload = inp_portaudio_upload
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}};
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static VisPluginInfo info[] = {{
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.type = VISUAL_PLUGIN_TYPE_INPUT,
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.plugname = "portaudio",
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.name = "portaudio",
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.author = "Sebastian Pipping <sebastian@pipping.org>",
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.version = "1.0",
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.about = N_("PortAudio capture plugin"),
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.help = N_("Use this plugin to capture PCM data from the PortAudio record device"),
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.license = VISUAL_PLUGIN_LICENSE_LGPL,
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.init = inp_portaudio_init,
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.cleanup = inp_portaudio_cleanup,
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.plugin = VISUAL_OBJECT (&input[0])
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}};
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*count = sizeof (info) / sizeof (*info);
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return info;
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}
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int inp_portaudio_init (VisPluginData *plugin)
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{
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#if ENABLE_NLS
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bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
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#endif
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PortAudioPrivate * const priv = visual_mem_new0 (PortAudioPrivate, 1);
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visual_log_return_val_if_fail(priv != NULL, -1);
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visual_object_set_private (VISUAL_OBJECT (plugin), priv);
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// Init PortAudio
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const PaError init_error = Pa_Initialize();
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visual_log_return_val_if_fail (init_error == paNoError, -2);
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// Select input device
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const PaDeviceIndex input_device = Pa_GetDefaultInputDevice ();
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visual_log_return_val_if_fail (input_device != paNoDevice, -3);
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// Open stream
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const double latency_seconds = 1.0 / SAMPLE_RATE * FRAMES;
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const PaStreamParameters input_parameters = {
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.device = input_device,
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.channelCount = CHANNELS,
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.sampleFormat = SAMPLE_FORMAT_PA,
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.suggestedLatency = latency_seconds,
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.hostApiSpecificStreamInfo = NULL};
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const PaError open_error =
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Pa_OpenStream (&priv->stream, &input_parameters, NULL,
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SAMPLE_RATE, FRAMES, paClipOff, NULL, NULL);
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// Allocate buffer
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const visual_size_t buffer_size_bytes = FRAMES * CHANNELS * (SAMPLE_FORMAT_BITS / 8);
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priv->buffer = malloc (buffer_size_bytes);
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visual_log_return_val_if_fail (priv->buffer != NULL, -4);
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// Start stream
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const PaError input_start_error = Pa_StartStream (priv->stream);
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visual_log_return_val_if_fail (input_start_error == paNoError, -4);
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return 0;
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}
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int inp_portaudio_cleanup (VisPluginData *plugin)
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{
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visual_log_return_val_if_fail (plugin != NULL, -1);
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PortAudioPrivate * const priv = visual_object_get_private (VISUAL_OBJECT (plugin));
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visual_log_return_val_if_fail (priv != NULL, -2);
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free (priv->buffer);
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priv->buffer = NULL;
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Pa_StopStream (priv->stream);
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Pa_CloseStream (priv->stream);
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priv->stream = NULL;
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Pa_Terminate ();
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visual_mem_free (priv);
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return 0;
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}
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int inp_portaudio_upload (VisPluginData *plugin, VisAudio *audio)
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{
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visual_log_return_val_if_fail (plugin != NULL, -1);
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visual_log_return_val_if_fail (audio != NULL, -2);
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PortAudioPrivate * const priv = visual_object_get_private (VISUAL_OBJECT (plugin));
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visual_log_return_val_if_fail (priv != NULL, -3);
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visual_log_return_val_if_fail (priv->stream != NULL, -4);
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for (;;) {
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long frames_to_read = Pa_GetStreamReadAvailable (priv->stream);
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if (frames_to_read < 1) {
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return 0;
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}
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if (frames_to_read > FRAMES) {
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frames_to_read = FRAMES; // because that's all that priv->buffer has space for
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}
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const PaError read_error = Pa_ReadStream(priv->stream, priv->buffer, frames_to_read);
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if (read_error != paNoError) {
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return 0;
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}
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const visual_size_t bytes_to_write = frames_to_read * CHANNELS * (SAMPLE_FORMAT_BITS / 8);
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VisBuffer buffer;
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visual_buffer_init(&buffer, priv->buffer, bytes_to_write, NULL);
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visual_audio_samplepool_input(audio->samplepool, &buffer, SAMPLE_RATE_TYPE_LV,
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SAMPLE_FORMAT_LV, CHANNELS_TYPE);
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}
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// we never get here
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}

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