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amc: Add helper function for getting a direct buffer array

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This commit is contained in:
Sebastian Dröge 2015-03-28 15:08:15 +01:00
parent 0dbf5d322f
commit 448867f0aa
2 changed files with 73 additions and 0 deletions
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62
sys/androidmedia/gstjniutils.c
View file

@ -827,3 +827,65 @@ GET_STATIC_TYPE_FIELD (gint64, long, Long);
GET_STATIC_TYPE_FIELD (gfloat, float, Float);
GET_STATIC_TYPE_FIELD (gdouble, double, Double);
GET_STATIC_TYPE_FIELD (jobject, object, Object);
gboolean
gst_amc_jni_get_buffer_array (JNIEnv * env, GError ** err, jobject array,
GstAmcBuffer ** buffers, gsize * n_buffers)
{
jsize i;
*n_buffers = (*env)->GetArrayLength (env, array);
*buffers = g_new0 (GstAmcBuffer, *n_buffers);
for (i = 0; i < *n_buffers; i++) {
jobject buffer = NULL;
buffer = (*env)->GetObjectArrayElement (env, array, i);
if ((*env)->ExceptionCheck (env) || !buffer) {
gst_amc_jni_set_error (env, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_FAILED,
err, "Failed to get buffer %d", i);
goto error;
}
(*buffers)[i].object = gst_amc_jni_object_make_global (env, buffer);
if (!(*buffers)[i].object) {
gst_amc_jni_set_error (env, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_FAILED,
err, "Failed to create global buffer reference %d", i);
goto error;
}
(*buffers)[i].data =
(*env)->GetDirectBufferAddress (env, (*buffers)[i].object);
if (!(*buffers)[i].data) {
gst_amc_jni_set_error (env, GST_LIBRARY_ERROR, GST_LIBRARY_ERROR_FAILED,
err, "Failed to get buffer address %d", i);
goto error;
}
(*buffers)[i].size =
(*env)->GetDirectBufferCapacity (env, (*buffers)[i].object);
}
return TRUE;
error:
if (*buffers)
gst_amc_jni_free_buffer_array (env, *buffers, *n_buffers);
*buffers = NULL;
*n_buffers = 0;
return FALSE;
}
void
gst_amc_jni_free_buffer_array (JNIEnv * env, GstAmcBuffer * buffers,
gsize n_buffers)
{
jsize i;
g_return_if_fail (buffers != NULL);
for (i = 0; i < n_buffers; i++) {
if (buffers[i].object)
gst_amc_jni_object_unref (env, buffers[i].object);
}
g_free (buffers);
}

11
sys/androidmedia/gstjniutils.h
View file

@ -164,4 +164,15 @@ DEF_GET_STATIC_TYPE_FIELD (gfloat, float, Float);
DEF_GET_STATIC_TYPE_FIELD (gdouble, double, Double);
DEF_GET_STATIC_TYPE_FIELD (jobject, object, Object);
typedef struct _GstAmcBuffer GstAmcBuffer;
struct _GstAmcBuffer {
jobject object; /* global reference */
guint8 *data;
gsize size;
};
gboolean gst_amc_jni_get_buffer_array (JNIEnv * env, GError ** err, jobject array, GstAmcBuffer ** buffers, gsize * n_buffers);
void gst_amc_jni_free_buffer_array (JNIEnv * env, GstAmcBuffer * buffers, gsize n_buffers);
#endif