diff options
Diffstat (limited to 'libjava/classpath/native/jni/gstreamer-peer/GStreamerIOPeer.c')
| -rw-r--r-- | libjava/classpath/native/jni/gstreamer-peer/GStreamerIOPeer.c | 772 |
1 files changed, 772 insertions, 0 deletions
diff --git a/libjava/classpath/native/jni/gstreamer-peer/GStreamerIOPeer.c b/libjava/classpath/native/jni/gstreamer-peer/GStreamerIOPeer.c new file mode 100644 index 00000000000..f5d52e8a4b4 --- /dev/null +++ b/libjava/classpath/native/jni/gstreamer-peer/GStreamerIOPeer.c @@ -0,0 +1,772 @@ +/* GStreamerIOPeer.c -- Implements native methods for class GStreamerNativePeer + Copyright (C) 2007 Free Software Foundation, Inc. + + This file is part of GNU Classpath. + + GNU Classpath 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, or (at your option) + any later version. + + GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the + Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + 02110-1301 USA. + + Linking this library statically or dynamically with other modules is + making a combined work based on this library. Thus, the terms and + conditions of the GNU General Public License cover the whole + combination. + + As a special exception, the copyright holders of this library give you + permission to link this library with independent modules to produce an + executable, regardless of the license terms of these independent + modules, and to copy and distribute the resulting executable under + terms of your choice, provided that you also meet, for each linked + independent module, the terms and conditions of the license of that + module. An independent module is a module which is not derived from + or based on this library. If you modify this library, you may extend + this exception to your version of the library, but you are not + obligated to do so. If you do not wish to do so, delete this + exception statement from your version. */ + +#include <stdio.h> +#include <string.h> + +#include <jni.h> + +#include <glib.h> +#include <glib/gprintf.h> + +#include <gdk/gdk.h> + +#include <gst/gst.h> + +#include "jcl.h" + +#include "gnu_javax_sound_sampled_gstreamer_io_GstAudioFileReaderNativePeer.h" + +#include "gstclasspathsrc.h" +#include "gstinputstream.h" + +#define _GST_MALLOC_SIZE_ 256 + +typedef struct _AudioProperties AudioProperties; +struct _AudioProperties +{ + /* + * NOTE: descriptions of the properties are taken from: + * http://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/section-types-definitions.html#table-audio-types + */ + + /* decoder name */ + const char *name; + + /* audio endiannes */ + const char *endianness; + + /* header size */ + const char *header_size; + + /* mime */ + const char *mimetype; + + /* The sample rate of the data, in samples (per channel) per second */ + const char *samplerate; + + /* The number of channels of audio data */ + const char *channels; + + const char *layer; + + const char *bitrate; + + const char *framed; + + /* + * Defines if the values of the integer samples are signed or not. + * Signed samples use one bit to indicate sign (negative or positive) + * of the value. Unsigned samples are always positive. + */ + const char *signess; + + /* */ + const char *rate; + + /* Number of bits allocated per sample. */ + const char *width; + + /* + * The number of bits used per sample. + * If the depth is less than the width, the low bits are assumed to be the + * ones used. For example, a width of 32 and a depth of 24 means that + * each sample is stored in a 32 bit word, but only the low + * 24 bits are actually used. + */ + const char *depth; + + /* + * This is set in the case of the mpeg files. + */ + const char *type; + + gboolean done; + +}; + +/* ***** PRIVATE FUNCTIONS DECLARATION ***** */ + +static gboolean +set_strings (JNIEnv *env, const jclass GstHeader, + const AudioProperties *properties, jobject header); + +static gboolean +typefind_callback(GstElement *typefind, guint probability, const GstCaps *caps, + gpointer data); + +static void +element_added (GstBin *bin, GstElement *element, gpointer data); + +static void +new_decoded_pad (GstElement *decoder, GstPad *pad, + gboolean last, GstElement *pipeline); + +static gboolean +fill_info (GstElement *decoder, AudioProperties *properties); + +static gchar * +get_string_property (const GstStructure *structure, const gchar *property); + +static gchar * +get_boolean_property (const GstStructure *structure, const gchar *property); + +static gboolean +set_string (JNIEnv *env, const jclass GstHeader, jobject header, + const char *field, const gchar *property); + +static void +free_properties (AudioProperties *properties); + +static void +reset_properties (AudioProperties *properties); + +/* ***** END: PRIVATE FUNCTIONS DECLARATION ***** */ + +/* ***** NATIVE FUNCTIONS ***** */ + +JNIEXPORT jboolean JNICALL +Java_gnu_javax_sound_sampled_gstreamer_io_GstAudioFileReaderNativePeer_gstreamer_1get_1audio_1format_1stream + (JNIEnv *env, jclass clazz __attribute__ ((unused)), jobject header __attribute__ ((unused)), + jobject jstream __attribute__ ((unused))) +{ + GstInputStream *istream = NULL; + JavaVM *vm = NULL; + jclass GstHeader = NULL; + + GstElement *pipeline = NULL; + + GstElement *typefind = NULL; + GstElement *decodebin = NULL; + GstElement *source = NULL; + + AudioProperties *properties = NULL; + + jboolean result = JNI_FALSE; + + GstHeader = (*env)->GetObjectClass(env, header); + + gst_init (NULL, NULL); + + properties = (AudioProperties *) g_malloc0 (sizeof (AudioProperties)); + if (properties == NULL) + { + g_warning ("unable to allocate memory for properties"); + return JNI_FALSE; + } + + /* create the GstInputStream object */ + istream = g_object_new (GST_TYPE_INPUT_STREAM, NULL); + if (istream == NULL) + { + free_properties (properties); + + g_warning ("unable to create an istream"); + return JNI_FALSE; + } + + source = gst_element_factory_make ("classpathsrc", "source"); + if (source == NULL) + { + free_properties (properties); + g_free ((gpointer) istream); + + g_warning ("unable to create a source"); + return JNI_FALSE; + } + + /* store the vm and the input stream in the gstinputstream class */ + (*env)->GetJavaVM(env, &vm); + g_object_set (G_OBJECT (istream), GST_ISTREAM_JVM, vm, + GST_ISTREAM_READER, jstream, + NULL); + g_object_set (G_OBJECT (source), GST_CLASSPATH_SRC_ISTREAM, istream, NULL); + + pipeline = gst_pipeline_new ("pipe"); + if (pipeline == NULL) + { + gst_object_unref (GST_OBJECT (source)); + g_free ((gpointer) istream); + free_properties (properties); + + g_warning ("unable to create the pipeline"); + return JNI_FALSE; + } + + decodebin = gst_element_factory_make ("decodebin", "decodebin"); + if (decodebin == NULL) + { + gst_object_unref (GST_OBJECT (source)); + + g_free ((gpointer) istream); + free_properties(properties); + + gst_object_unref(GST_OBJECT(pipeline)); + + g_warning ("unable to create decodebin"); + return JNI_FALSE; + } + + g_signal_connect (decodebin, "new-decoded-pad", G_CALLBACK (new_decoded_pad), + pipeline); + + gst_bin_add_many (GST_BIN (pipeline), source, decodebin, NULL); + gst_element_link (source, decodebin); + + typefind = gst_bin_get_by_name (GST_BIN (decodebin), "typefind"); + if (typefind == NULL) + { + g_free ((gpointer) istream); + free_properties(properties); + + gst_object_unref(GST_OBJECT(pipeline)); + + g_warning ("unable to create decodebin"); + return JNI_FALSE; + } + + g_signal_connect (G_OBJECT (typefind), "have-type", + G_CALLBACK (typefind_callback), properties); + + gst_element_set_state (GST_ELEMENT(pipeline), GST_STATE_PLAYING); + if (gst_element_get_state (pipeline, NULL, NULL, 100000) == + GST_STATE_CHANGE_FAILURE) + { + g_free ((gpointer) istream); + free_properties(properties); + gst_object_unref(GST_OBJECT(pipeline)); + + g_warning ("Failed to go into PLAYING state"); + return JNI_FALSE; + } + + result = JNI_FALSE; + if (fill_info (decodebin, properties)) + { + result = set_strings (env, GstHeader, properties, header); + } + + gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_NULL); + + gst_object_unref (GST_OBJECT(pipeline)); + free_properties (properties); + + return result; +} + +JNIEXPORT jboolean JNICALL +Java_gnu_javax_sound_sampled_gstreamer_io_GstAudioFileReaderNativePeer_gstreamer_1get_1audio_1format_1file + (JNIEnv *env, jclass clazz __attribute__ ((unused)), jobject header) +{ + /* will contain the properties we need to put into the given GstHeader */ + AudioProperties *properties = NULL; + + /* source file */ + const char *file = NULL; + + /* GStreamer elements */ + GstElement *pipeline = NULL; + GstElement *source = NULL; + GstElement *decoder = NULL; + + GstElement *typefind = NULL; + + GstStateChangeReturn res; + + jboolean result = JNI_FALSE; + + /* java fields */ + jfieldID _fid = NULL; + jclass GstHeader = NULL; + jstring _file = NULL; + + GstHeader = (*env)->GetObjectClass(env, header); + _fid = (*env)->GetFieldID(env, GstHeader, "file", "Ljava/lang/String;"); + if (_fid == NULL) + { + return JNI_FALSE; /* failed to find the field */ + } + + _file = (*env)->GetObjectField(env, header, _fid); + file = JCL_jstring_to_cstring (env, _file); + if (file == NULL) + { + return JNI_FALSE; + } + + gst_init (NULL, NULL); + + properties = (AudioProperties *) g_malloc0 (sizeof (AudioProperties)); + if (properties == NULL) + { + free_properties (properties); + JCL_free_cstring (env, _file, file); + return JNI_FALSE; + } + + /* this is not really needed */ + reset_properties(properties); + + /* create the source element, will be used to read the file */ + source = gst_element_factory_make ("filesrc", "source"); + if (source == NULL) + { + free_properties (properties); + JCL_free_cstring (env, _file, file); + return JNI_FALSE; + } + + /* set the file name */ + g_object_set (G_OBJECT (source), "location", file, NULL); + + /* + * create the decoder element, this will decode the stream and retrieve + * its properties. + * We connect a signal to this element, to be informed when it is done + * in decoding the stream and to get the needed informations about the + * audio file. + */ + decoder = gst_element_factory_make ("decodebin", "decoder"); + if (decoder == NULL) + { + gst_object_unref (GST_OBJECT (source)); + free_properties(properties); + + JCL_free_cstring (env, _file, file); + return JNI_FALSE; + } + + g_signal_connect (decoder, "new-decoded-pad", G_CALLBACK (new_decoded_pad), + pipeline); + g_signal_connect (G_OBJECT (decoder), "element-added", + G_CALLBACK (element_added), properties); + + /* now, we create a pipeline and fill it with the other elements */ + pipeline = gst_pipeline_new ("pipeline"); + if (pipeline == NULL) + { + gst_object_unref (GST_OBJECT (source)); + gst_object_unref (GST_OBJECT (decoder)); + + free_properties(properties); + + JCL_free_cstring (env, _file, file); + return JNI_FALSE; + } + + /* + * we get the typefind from the decodebin to catch the additional properties + * that the decodebin does not expose to us + */ + typefind = gst_bin_get_by_name (GST_BIN (decoder), "typefind"); + if (typefind != NULL) + { + /* + * NOTE: the above is not a typo, we can live without the typefind, + * just, our stream detection will not be as accurate as we would. + * Anyway, if this fails, there is some problem, probabily a memory + * error. + */ + g_signal_connect (G_OBJECT (typefind), "have-type", + G_CALLBACK (typefind_callback), properties); + } + + gst_bin_add_many (GST_BIN (pipeline), source, decoder, NULL); + gst_element_link (source, decoder); + + /* + * now, we set the pipeline playing state to pause and traverse it + * to get the info we need. + */ + + res = gst_element_set_state (pipeline, GST_STATE_PAUSED); + if (res == GST_STATE_CHANGE_FAILURE) + { + JCL_free_cstring (env, _file, file); + gst_element_set_state (pipeline, GST_STATE_NULL); + gst_object_unref (GST_OBJECT (pipeline)); + + free_properties(properties); + + return JNI_FALSE; + } + + /* (GstClockTime) 300000000 ? */ + res = gst_element_get_state (pipeline, NULL, NULL, GST_CLOCK_TIME_NONE); + if (res != GST_STATE_CHANGE_SUCCESS) + { + JCL_free_cstring (env, _file, file); + gst_element_set_state (pipeline, GST_STATE_NULL); + gst_object_unref (GST_OBJECT (pipeline)); + + free_properties(properties); + + return JNI_FALSE; + } + + result = JNI_FALSE; + if (fill_info (decoder, properties)) + { + result = set_strings (env, GstHeader, properties, header); + } + + /* free stuff */ + JCL_free_cstring (env, _file, file); + gst_element_set_state (pipeline, GST_STATE_NULL); + + gst_object_unref (GST_OBJECT (pipeline)); + + free_properties (properties); + + return result; +} + +/* ***** END: NATIVE FUNCTIONS ***** */ + +/* ***** PRIVATE FUNCTIONS IMPLEMENTATION ***** */ +static gboolean typefind_callback(GstElement *typefind __attribute__ ((unused)), + guint probability __attribute__ ((unused)), + const GstCaps *caps, + gpointer data) +{ + GstStructure *structure = NULL; + AudioProperties *properties = NULL; + + const char *mpeg = NULL; + + properties = (AudioProperties *) data; + + structure = gst_caps_get_structure (caps, 0); + + /* MIMETYPE */ + properties->mimetype = gst_structure_get_name (structure); + mpeg = get_string_property(structure, "mpegversion"); + + if (mpeg != NULL) + { + properties->layer = get_string_property(structure, "layer"); + properties->type = (gchar *) g_malloc0 (_GST_MALLOC_SIZE_); + g_snprintf ((gpointer) properties->type, _GST_MALLOC_SIZE_, + "MPEG%sV%s", mpeg, + properties->layer); + + g_free ((gpointer) mpeg); + } + + return TRUE; +} + +static void +new_decoded_pad (GstElement *decoder __attribute__ ((unused)), + GstPad *pad, + gboolean last __attribute__ ((unused)), + GstElement *pipeline) +{ + GstElement *fakesink = NULL; + GstPad *sinkpad = NULL; + + fakesink = gst_element_factory_make ("fakesink", NULL); + gst_bin_add (GST_BIN (pipeline), fakesink); + + sinkpad = gst_element_get_pad (fakesink, "sink"); + if (GST_PAD_LINK_FAILED (gst_pad_link (pad, sinkpad))) + { + gst_bin_remove (GST_BIN (pipeline), fakesink); + } + else + { + gst_element_set_state (fakesink, GST_STATE_PAUSED); + } +} + +static gboolean +set_strings (JNIEnv *env, const jclass GstHeader, + const AudioProperties *properties, jobject header) +{ + gboolean result = FALSE; + + /* + * we only need at least one of them to be sure we can handle this + * kind of audio data. + */ + + /* now, map our properties to the java class */ + set_string (env, GstHeader, header, "mimetype", properties->mimetype); + + if (set_string (env, GstHeader, header, "endianness", + properties->endianness)) result = JNI_TRUE; + + if (set_string (env, GstHeader, header, "channels", + properties->channels)) result = JNI_TRUE; + + if (set_string (env, GstHeader, header, "rate", + properties->rate)) result = JNI_TRUE; + + if (set_string (env, GstHeader, header, "width", + properties->width)) result = JNI_TRUE; + + if (set_string (env, GstHeader, header, "depth", + properties->depth)) result = JNI_TRUE; + + if (set_string (env, GstHeader, header, "isSigned", + properties->signess)) result = JNI_TRUE; + + if (set_string (env, GstHeader, header, "name", + properties->name)) result = JNI_TRUE; + + /* non primary properties */ + set_string (env, GstHeader, header, "layer", properties->layer); + set_string (env, GstHeader, header, "bitrate", properties->bitrate); + set_string (env, GstHeader, header, "framed", properties->framed); + set_string (env, GstHeader, header, "type", properties->type); + + return result; +} + +static gboolean fill_info (GstElement *decoder, AudioProperties *properties) +{ + GstIterator *it = NULL; + gpointer data = NULL; + gboolean result = FALSE; + + it = gst_element_iterate_src_pads (decoder); + while (gst_iterator_next (it, &data) == GST_ITERATOR_OK) + { + GstPad *pad = GST_PAD (data); + GstCaps *caps; + + GstStructure *structure; + + const gchar *caps_string = NULL; + + caps = gst_pad_get_caps (pad); + caps_string = gst_caps_to_string (caps); + + if (g_str_has_prefix (caps_string, "video")) + { + /* no video support, this is an audio library */ + + g_free ((gpointer) caps_string); + gst_caps_unref (caps); + gst_object_unref (pad); + + continue; + } + + g_free ((gpointer) caps_string); + + structure = gst_caps_get_structure (GST_CAPS (caps), 0); + + /* fill the properties we need */ + + /* SIGNESS */ + properties->signess = get_boolean_property(structure, "signed"); + if (properties->signess != NULL) + { + result = TRUE; + } + + /* ENDIANNESS */ + properties->endianness = get_string_property(structure, "endianness"); + if (properties->endianness != NULL) + { + result = TRUE; + } + + /* CHANNELS */ + properties->channels = get_string_property(structure, "channels"); + if (properties->channels != NULL) + { + result = TRUE; + } + + /* RATE */ + properties->rate = get_string_property(structure, "rate"); + if (properties->rate != NULL) + { + result = TRUE; + } + + /* WIDTH */ + properties->width = get_string_property(structure, "width"); + if (properties->width != NULL) + { + result = TRUE; + } + + /* DEPTH */ + properties->depth = get_string_property(structure, "depth"); + if (properties->depth != NULL) + { + result = TRUE; + } + + gst_caps_unref (caps); + gst_object_unref (pad); + } + + return result; +} + +static void free_properties (AudioProperties *properties) +{ + if (properties->name != NULL) g_free((gpointer) properties->name); + if (properties->endianness != NULL) g_free((gpointer) properties->endianness); + if (properties->channels != NULL) g_free((gpointer) properties->channels); + if (properties->rate != NULL) g_free((gpointer) properties->rate); + if (properties->width != NULL) g_free((gpointer) properties->width); + if (properties->depth != NULL) g_free((gpointer) properties->depth); + if (properties->layer != NULL) g_free((gpointer) properties->layer); + if (properties->bitrate != NULL) g_free((gpointer) properties->bitrate); + if (properties->framed != NULL) g_free((gpointer) properties->framed); + + if (properties != NULL) g_free ((gpointer) properties); +} + +static void reset_properties (AudioProperties *properties) +{ + properties->done = FALSE; + properties->signess = FALSE; + properties->name = NULL; + properties->endianness = NULL; + properties->channels = NULL; + properties->rate = NULL; + properties->width = NULL; + properties->depth = NULL; + properties->layer = NULL; + properties->bitrate = NULL; + properties->framed = NULL; +} + +static gchar *get_string_property (const GstStructure *structure, + const gchar *property) +{ + int props = 0; + gchar *result = NULL; + + if (property == NULL) + { + return NULL; + } + + /* we don't need more */ + result = (gchar *) g_malloc0 (_GST_MALLOC_SIZE_); + if (result == NULL) + { + /* huston, we have a problem here... */ + return NULL; + } + + if (gst_structure_get_int (structure, property, &props)) + { + g_snprintf (result, _GST_MALLOC_SIZE_, "%d", props); + } + else + { + g_free ((gpointer) result); + return NULL; + } + + return result; +} + +static gchar *get_boolean_property (const GstStructure *structure, + const gchar *property) +{ + gchar *result = NULL; + gboolean props = FALSE; + + result = (gchar *) g_malloc0 (_GST_MALLOC_SIZE_); + if (result == NULL) + { + /* huston, we have a problem here... */ + return NULL; + } + + if (gst_structure_get_boolean (structure, property, &props)) + { + g_snprintf (result, _GST_MALLOC_SIZE_, "%s", (props ? "true" : "false" )); + } + else + { + g_free ((gpointer) result); + return NULL; + } + + return result; +} + +static gboolean set_string (JNIEnv *env, const jclass GstHeader, + jobject header, + const char *field, + const gchar *property) +{ + jfieldID _fid = NULL; + jstring property_string_field = NULL; + + if (property == NULL || field == NULL || header == NULL || GstHeader == NULL) + { + return JNI_FALSE; + } + + _fid = (*env)->GetFieldID(env, GstHeader, field, "Ljava/lang/String;"); + if (_fid == NULL) + { + return JNI_FALSE; /* failed to find the field */ + } + + property_string_field = (*env)->NewStringUTF(env, property); + if (property_string_field == NULL) + { + return JNI_FALSE; + } + + (*env)->SetObjectField(env, header, _fid, property_string_field); + + return JNI_TRUE; +} + +static void +element_added (GstBin *bin, GstElement *element, gpointer data) +{ + GstElementFactory *factory; + + factory = gst_element_get_factory (element); + ((AudioProperties *) data)->name = gst_element_factory_get_longname (factory); +} + +/* ***** END: PRIVATE FUNCTIONS IMPLEMENTATION ***** */ |