added mono2stereo dsp plugin

2 files changed, 199 insertions, 0 deletions

diff --git a/plugins/mono2stereo/Makefile b/plugins/mono2stereo/Makefile
new file mode 100644
index 00000000..067f074d
--- /dev/null
+++ b/plugins/mono2stereo/Makefile
@@ -0,0 +1,23 @@
+CC=gcc
+
+CFLAGS+=-Wall -fPIC -D_GNU_SOURCE -std=c99
+
+LDFLAGS+=-module -shared -lm
+
+SOURCES=mono2stereo.c
+
+OBJECTS=$(SOURCES:.c=.o)
+
+OUT=mono2stereo.so
+
+all: $(SOURCES) $(OUT)
+
+$(OUT): $(OBJECTS)
+	$(CC) $(LDFLAGS) $(OBJECTS) -o $@
+
+.c.o:
+	$(CC) $(CFLAGS) $< -c -o $@
+
+clean:
+	rm $(OBJECTS) $(OUT)
+
diff --git a/plugins/mono2stereo/mono2stereo.c b/plugins/mono2stereo/mono2stereo.c
new file mode 100644
index 00000000..f10a9375
--- /dev/null
+++ b/plugins/mono2stereo/mono2stereo.c
@@ -0,0 +1,176 @@
+/*
+    DeaDBeeF - ultimate music player for GNU/Linux systems with X11
+    Copyright (C) 2009-2011 Alexey Yakovenko <waker@users.sourceforge.net>
+
+    This program 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.
+    
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+*/
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <deadbeef/deadbeef.h>
+
+enum {
+    M2S_PARAM_LEFTMIX,
+    M2S_PARAM_RIGHTMIX,
+    M2S_PARAM_COUNT
+};
+
+static DB_functions_t *deadbeef;
+static DB_dsp_t plugin;
+
+typedef struct {
+    ddb_dsp_context_t ctx;
+    float leftmix;
+    float rightmix;
+} ddb_m2s_t;
+
+ddb_dsp_context_t*
+m2s_open (void) {
+    ddb_m2s_t *m2s = malloc (sizeof (ddb_m2s_t));
+    DDB_INIT_DSP_CONTEXT (m2s,ddb_m2s_t,&plugin);
+
+    // initialize
+    m2s->leftmix = 1;
+    m2s->rightmix = 1;
+
+    return (ddb_dsp_context_t *)m2s;
+}
+
+void
+m2s_close (ddb_dsp_context_t *ctx) {
+    ddb_m2s_t *m2s = (ddb_m2s_t *)ctx;
+
+    // free instance-specific allocations
+
+    free (m2s);
+}
+
+void
+m2s_reset (ddb_dsp_context_t *ctx) {
+    // use this method to flush dsp buffers, reset filters, etc
+}
+
+int
+m2s_process (ddb_dsp_context_t *ctx, float *samples, int nframes, int maxframes, ddb_waveformat_t *fmt, float *r) {
+    if (fmt->channels >= 2) {
+        return nframes;
+    }
+    ddb_m2s_t *m2s = (ddb_m2s_t *)ctx;
+
+    for (int i = nframes-1; i >= 0; i--) {
+        samples[i*2+1] = samples[i] * m2s->rightmix;
+        samples[i*2+0] = samples[i] * m2s->leftmix;
+    }
+    fmt->channels = 2;
+    fmt->channelmask = 3;
+    return nframes;
+}
+
+const char *
+m2s_get_param_name (int p) {
+    switch (p) {
+    case M2S_PARAM_LEFTMIX:
+        return "Left mix";
+    case M2S_PARAM_RIGHTMIX:
+        return "Right mix";
+    default:
+        fprintf (stderr, "m2s_param_name: invalid param index (%d)\n", p);
+    }
+    return NULL;
+}
+
+int
+m2s_num_params (void) {
+    return M2S_PARAM_COUNT;
+}
+
+void
+m2s_set_param (ddb_dsp_context_t *ctx, int p, const char *val) {
+    ddb_m2s_t *m2s = (ddb_m2s_t *)ctx;
+    switch (p) {
+    case M2S_PARAM_LEFTMIX:
+        m2s->leftmix = atof (val);
+        break;
+    case M2S_PARAM_RIGHTMIX:
+        m2s->rightmix = atof (val);
+        break;
+    default:
+        fprintf (stderr, "m2s_set_param: invalid param index (%d)\n", p);
+    }
+}
+
+void
+m2s_get_param (ddb_dsp_context_t *ctx, int p, char *val, int sz) {
+    ddb_m2s_t *m2s = (ddb_m2s_t *)ctx;
+    switch (p) {
+    case M2S_PARAM_LEFTMIX:
+        snprintf (val, sz, "%f", m2s->leftmix);
+        break;
+    case M2S_PARAM_RIGHTMIX:
+        snprintf (val, sz, "%f", m2s->rightmix);
+        break;
+    default:
+        fprintf (stderr, "m2s_get_param: invalid param index (%d)\n", p);
+    }
+}
+
+static const char settings_dlg[] =
+    "property \"Left mix:\" hscale[0,1,0.001] 0 1;\n"
+    "property \"Right mix:\" hscale[0,1,0.001] 1 1;\n"
+;
+
+static DB_dsp_t plugin = {
+    .plugin.api_vmajor = 1,
+    .plugin.api_vminor = 0,
+    .open = m2s_open,
+    .close = m2s_close,
+    .process = m2s_process,
+    .plugin.version_major = 1,
+    .plugin.version_minor = 0,
+    .plugin.type = DB_PLUGIN_DSP,
+    .plugin.id = "m2s",
+    .plugin.name = "Mono to stereo",
+    .plugin.descr = "DSP plugin to convert mono to stereo",
+    .plugin.copyright = 
+        "Copyright (C) 2009-2011 Alexey Yakovenko <waker@users.sourceforge.net>\n"
+        "\n"
+        "This program is free software; you can redistribute it and/or\n"
+        "modify it under the terms of the GNU General Public License\n"
+        "as published by the Free Software Foundation; either version 2\n"
+        "of the License, or (at your option) any later version.\n"
+        "\n"
+        "This program is distributed in the hope that it will be useful,\n"
+        "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
+        "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
+        "GNU General Public License for more details.\n"
+        "\n"
+        "You should have received a copy of the GNU General Public License\n"
+        "along with this program; if not, write to the Free Software\n"
+        "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.\n"
+    ,
+    .num_params = m2s_num_params,
+    .get_param_name = m2s_get_param_name,
+    .set_param = m2s_set_param,
+    .get_param = m2s_get_param,
+    .reset = m2s_reset,
+    .configdialog = settings_dlg,
+};
+
+DB_plugin_t *
+mono2stereo_load (DB_functions_t *f) {
+    deadbeef = f;
+    return &plugin.plugin;
+}
+