ecore_audio: Add support for adding a custom callback

Very hackish implementation and probably not needed as libsndfile
virtual IO can be used instead, though it's a little more complicated

Signed-off-by: Daniel Willmann <d.willmann@samsung.com>

SVN revision: 80998

src/lib/ecore_audio/Ecore_Audio.h

@@ -445,6 +445,8 @@ EAPI void ecore_audio_output_sndfile_vio_set(Ecore_Audio_Object *output, Ecore_A
 EAPI void ecore_audio_input_tone_frequency_set(Ecore_Audio_Object *input, int frequency);
 EAPI void ecore_audio_input_tone_duration_set(Ecore_Audio_Object *input, double duration);
 
+EAPI void                ecore_audio_input_callback_setup(Ecore_Audio_Object *input, Ecore_Audio_Read_Callback read_cb, void *data);
+
 /**
  * @}
  */

src/lib/ecore_audio/ecore_audio.c

@@ -91,6 +91,10 @@ ecore_audio_init(void)
    if (mod)
      ecore_audio_modules = eina_list_append(ecore_audio_modules, mod);
 
+   mod = ecore_audio_custom_init();
+   if (mod)
+     ecore_audio_modules = eina_list_append(ecore_audio_modules, mod);
+
    return _ecore_audio_init_count;
 }
 
@@ -110,6 +114,7 @@ ecore_audio_shutdown(void)
    ecore_audio_sndfile_shutdown();
 #endif
    ecore_audio_tone_shutdown();
+   ecore_audio_custom_shutdown();
 
    eina_list_free(ecore_audio_modules);
 
@@ -575,6 +580,17 @@ ecore_audio_input_remaining_get(Ecore_Audio_Object *input)
   return in->length - inmod->in_ops->input_seek(input, 0, SEEK_CUR);
 }
 
+/* XXX: Error checking!!! */
+EAPI void
+ecore_audio_input_callback_setup(Ecore_Audio_Object *input, Ecore_Audio_Read_Callback read_cb, void *data)
+{
+  EINA_SAFETY_ON_NULL_RETURN(input);
+  struct _Ecore_Audio_Callback *cb = input->module_data;
+
+  cb->read_cb = read_cb;
+  cb->data = data;
+}
+
 /**
  * @}
  */

src/lib/ecore_audio/ecore_audio_custom.c

@@ -0,0 +1,98 @@
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "Ecore.h"
+#include "ecore_private.h"
+#include "Ecore_Audio.h"
+#include "ecore_audio_private.h"
+
+static Ecore_Audio_Module *module = NULL;
+
+static Ecore_Audio_Object *
+_custom_input_new(Ecore_Audio_Object *input)
+{
+   Ecore_Audio_Input *in = (Ecore_Audio_Input *)input;
+   struct _Ecore_Audio_Callback *cb = calloc(1, sizeof(struct _Ecore_Audio_Callback));
+
+   in->samplerate = 44100;
+   in->channels = 2;
+
+   in->module_data = cb;
+
+   return (Ecore_Audio_Object *)in;
+}
+
+static void
+_custom_input_del(Ecore_Audio_Object *input)
+{
+   Ecore_Audio_Input *in = (Ecore_Audio_Input *)input;
+   free(in->module_data);
+}
+
+static int
+_custom_input_read(Ecore_Audio_Object *input, void *data, int len)
+{
+   Ecore_Audio_Input *in = (Ecore_Audio_Input *)input;
+   struct _Ecore_Audio_Callback *cb = in->module_data;
+
+   if (in->paused)
+     {
+        memset(data, 0, len);
+        return len;
+     }
+
+   return cb->read_cb(cb->data, data, len);
+}
+
+static double
+_custom_input_seek(Ecore_Audio_Object *input EINA_UNUSED, double offs EINA_UNUSED, int mode EINA_UNUSED)
+{
+   return 0;
+}
+
+static struct input_api inops = {
+   .input_new = _custom_input_new,
+   .input_del = _custom_input_del,
+   .input_read = _custom_input_read,
+   .input_seek = _custom_input_seek,
+};
+
+/**
+ * @brief Initialize the Ecore_Audio sndfile module
+ *
+ * @return the initialized module on success, NULL on error
+ */
+Ecore_Audio_Module *
+ecore_audio_custom_init(void)
+{
+   module = calloc(1, sizeof(Ecore_Audio_Module));
+   if (!module)
+     {
+        ERR("Could not allocate memory for module.");
+        return NULL;
+     }
+
+   ECORE_MAGIC_SET(module, ECORE_MAGIC_AUDIO_MODULE);
+   module->type = ECORE_AUDIO_TYPE_CUSTOM;
+   module->name = "custom";
+   module->inputs = NULL;
+   module->outputs = NULL;
+   module->in_ops = &inops;
+   module->out_ops = NULL;
+
+   DBG("Initialized");
+   return module;
+}
+
+/**
+ * @brief Shut down the Ecore_Audio custom module
+ */
+void
+ecore_audio_custom_shutdown(void)
+{
+   free(module);
+   module = NULL;
+
+   DBG("Shutting down");
+}

src/lib/ecore_audio/ecore_audio_private.h

@@ -348,6 +348,9 @@ struct _Ecore_Audio_Tone
 Ecore_Audio_Module *ecore_audio_tone_init(void);
 void                ecore_audio_tone_shutdown(void);
 
+Ecore_Audio_Module *ecore_audio_custom_init(void);
+void                ecore_audio_custom_shutdown(void);
+
 /**
  * @}
  */