Add native tests for libav/ffmpeg and gst

8 files changed, 1097 insertions, 0 deletions

diff --git a/src/test-native/ffmpeg/api-example.c b/src/test-native/ffmpeg/api-example.c
new file mode 100644
index 000000000..970a90eab
--- /dev/null
+++ b/src/test-native/ffmpeg/api-example.c
@@ -0,0 +1,479 @@
+/*
+ * copyright (c) 2001 Fabrice Bellard
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * libavcodec API use example.
+ *
+ * @example libavcodec/api-example.c
+ * Note that this library only handles codecs (mpeg, mpeg4, etc...),
+ * not file formats (avi, vob, etc...). See library 'libavformat' for the
+ * format handling
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#ifdef HAVE_AV_CONFIG_H
+#undef HAVE_AV_CONFIG_H
+#endif
+
+#include "libavcodec/avcodec.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/samplefmt.h"
+
+#define INBUF_SIZE 4096
+#define AUDIO_INBUF_SIZE 20480
+#define AUDIO_REFILL_THRESH 4096
+
+/*
+ * Audio encoding example
+ */
+static void audio_encode_example(const char *filename)
+{
+    AVCodec *codec;
+    AVCodecContext *c= NULL;
+    int frame_size, i, j, out_size, outbuf_size;
+    FILE *f;
+    short *samples;
+    float t, tincr;
+    uint8_t *outbuf;
+
+    printf("Audio encoding\n");
+
+    /* find the MP2 encoder */
+    codec = avcodec_find_encoder(CODEC_ID_MP2);
+    if (!codec) {
+        fprintf(stderr, "codec not found\n");
+        exit(1);
+    }
+
+    c = avcodec_alloc_context3(codec);
+
+    /* put sample parameters */
+    c->bit_rate = 64000;
+    c->sample_rate = 44100;
+    c->channels = 2;
+
+    /* open it */
+    if (avcodec_open(c, codec) < 0) {
+        fprintf(stderr, "could not open codec\n");
+        exit(1);
+    }
+
+    /* the codec gives us the frame size, in samples */
+    frame_size = c->frame_size;
+    samples = malloc(frame_size * 2 * c->channels);
+    outbuf_size = 10000;
+    outbuf = malloc(outbuf_size);
+
+    f = fopen(filename, "wb");
+    if (!f) {
+        fprintf(stderr, "could not open %s\n", filename);
+        exit(1);
+    }
+
+    /* encode a single tone sound */
+    t = 0;
+    tincr = 2 * M_PI * 440.0 / c->sample_rate;
+    for(i=0;i<200;i++) {
+        for(j=0;j<frame_size;j++) {
+            samples[2*j] = (int)(sin(t) * 10000);
+            samples[2*j+1] = samples[2*j];
+            t += tincr;
+        }
+        /* encode the samples */
+        out_size = avcodec_encode_audio(c, outbuf, outbuf_size, samples);
+        fwrite(outbuf, 1, out_size, f);
+    }
+    fclose(f);
+    free(outbuf);
+    free(samples);
+
+    avcodec_close(c);
+    av_free(c);
+}
+
+/*
+ * Audio decoding.
+ */
+static void audio_decode_example(const char *outfilename, const char *filename)
+{
+    AVCodec *codec;
+    AVCodecContext *c= NULL;
+    int len;
+    FILE *f, *outfile;
+    uint8_t inbuf[AUDIO_INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
+    AVPacket avpkt;
+    AVFrame *decoded_frame = NULL;
+
+    av_init_packet(&avpkt);
+
+    printf("Audio decoding\n");
+
+    /* find the mpeg audio decoder */
+    codec = avcodec_find_decoder(CODEC_ID_MP2);
+    if (!codec) {
+        fprintf(stderr, "codec not found\n");
+        exit(1);
+    }
+
+    c = avcodec_alloc_context3(codec);
+
+    /* open it */
+    if (avcodec_open(c, codec) < 0) {
+        fprintf(stderr, "could not open codec\n");
+        exit(1);
+    }
+
+    f = fopen(filename, "rb");
+    if (!f) {
+        fprintf(stderr, "could not open %s\n", filename);
+        exit(1);
+    }
+    outfile = fopen(outfilename, "wb");
+    if (!outfile) {
+        av_free(c);
+        exit(1);
+    }
+
+    /* decode until eof */
+    avpkt.data = inbuf;
+    avpkt.size = fread(inbuf, 1, AUDIO_INBUF_SIZE, f);
+
+    while (avpkt.size > 0) {
+        int got_frame = 0;
+
+        if (!decoded_frame) {
+            if (!(decoded_frame = avcodec_alloc_frame())) {
+                fprintf(stderr, "out of memory\n");
+                exit(1);
+            }
+        } else
+            avcodec_get_frame_defaults(decoded_frame);
+
+        len = avcodec_decode_audio4(c, decoded_frame, &got_frame, &avpkt);
+        if (len < 0) {
+            fprintf(stderr, "Error while decoding\n");
+            exit(1);
+        }
+        if (got_frame) {
+            /* if a frame has been decoded, output it */
+            int data_size = av_samples_get_buffer_size(NULL, c->channels,
+                                                       decoded_frame->nb_samples,
+                                                       c->sample_fmt, 1);
+            fwrite(decoded_frame->data[0], 1, data_size, outfile);
+        }
+        avpkt.size -= len;
+        avpkt.data += len;
+        if (avpkt.size < AUDIO_REFILL_THRESH) {
+            /* Refill the input buffer, to avoid trying to decode
+             * incomplete frames. Instead of this, one could also use
+             * a parser, or use a proper container format through
+             * libavformat. */
+            memmove(inbuf, avpkt.data, avpkt.size);
+            avpkt.data = inbuf;
+            len = fread(avpkt.data + avpkt.size, 1,
+                        AUDIO_INBUF_SIZE - avpkt.size, f);
+            if (len > 0)
+                avpkt.size += len;
+        }
+    }
+
+    fclose(outfile);
+    fclose(f);
+
+    avcodec_close(c);
+    av_free(c);
+    av_free(decoded_frame);
+}
+
+/*
+ * Video encoding example
+ */
+static void video_encode_example(const char *filename)
+{
+    AVCodec *codec;
+    AVCodecContext *c= NULL;
+    int i, out_size, size, x, y, outbuf_size;
+    FILE *f;
+    AVFrame *picture;
+    uint8_t *outbuf, *picture_buf;
+
+    printf("Video encoding\n");
+
+    /* find the mpeg1 video encoder */
+    codec = avcodec_find_encoder(CODEC_ID_MPEG1VIDEO);
+    if (!codec) {
+        fprintf(stderr, "codec not found\n");
+        exit(1);
+    }
+
+    c = avcodec_alloc_context3(codec);
+    picture= avcodec_alloc_frame();
+
+    /* put sample parameters */
+    c->bit_rate = 400000;
+    /* resolution must be a multiple of two */
+    c->width = 352;
+    c->height = 288;
+    /* frames per second */
+    c->time_base= (AVRational){1,25};
+    c->gop_size = 10; /* emit one intra frame every ten frames */
+    c->max_b_frames=1;
+    c->pix_fmt = PIX_FMT_YUV420P;
+
+    /* open it */
+    if (avcodec_open(c, codec) < 0) {
+        fprintf(stderr, "could not open codec\n");
+        exit(1);
+    }
+
+    f = fopen(filename, "wb");
+    if (!f) {
+        fprintf(stderr, "could not open %s\n", filename);
+        exit(1);
+    }
+
+    /* alloc image and output buffer */
+    outbuf_size = 100000;
+    outbuf = malloc(outbuf_size);
+    size = c->width * c->height;
+    picture_buf = malloc((size * 3) / 2); /* size for YUV 420 */
+
+    picture->data[0] = picture_buf;
+    picture->data[1] = picture->data[0] + size;
+    picture->data[2] = picture->data[1] + size / 4;
+    picture->linesize[0] = c->width;
+    picture->linesize[1] = c->width / 2;
+    picture->linesize[2] = c->width / 2;
+
+    /* encode 1 second of video */
+    for(i=0;i<25;i++) {
+        fflush(stdout);
+        /* prepare a dummy image */
+        /* Y */
+        for(y=0;y<c->height;y++) {
+            for(x=0;x<c->width;x++) {
+                picture->data[0][y * picture->linesize[0] + x] = x + y + i * 3;
+            }
+        }
+
+        /* Cb and Cr */
+        for(y=0;y<c->height/2;y++) {
+            for(x=0;x<c->width/2;x++) {
+                picture->data[1][y * picture->linesize[1] + x] = 128 + y + i * 2;
+                picture->data[2][y * picture->linesize[2] + x] = 64 + x + i * 5;
+            }
+        }
+
+        /* encode the image */
+        out_size = avcodec_encode_video(c, outbuf, outbuf_size, picture);
+        printf("encoding frame %3d (size=%5d)\n", i, out_size);
+        fwrite(outbuf, 1, out_size, f);
+    }
+
+    /* get the delayed frames */
+    for(; out_size; i++) {
+        fflush(stdout);
+
+        out_size = avcodec_encode_video(c, outbuf, outbuf_size, NULL);
+        printf("write frame %3d (size=%5d)\n", i, out_size);
+        fwrite(outbuf, 1, out_size, f);
+    }
+
+    /* add sequence end code to have a real mpeg file */
+    outbuf[0] = 0x00;
+    outbuf[1] = 0x00;
+    outbuf[2] = 0x01;
+    outbuf[3] = 0xb7;
+    fwrite(outbuf, 1, 4, f);
+    fclose(f);
+    free(picture_buf);
+    free(outbuf);
+
+    avcodec_close(c);
+    av_free(c);
+    av_free(picture);
+    printf("\n");
+}
+
+/*
+ * Video decoding example
+ */
+
+static void pgm_save(unsigned char *buf, int wrap, int xsize, int ysize,
+                     char *filename)
+{
+    FILE *f;
+    int i;
+
+    f=fopen(filename,"w");
+    fprintf(f,"P5\n%d %d\n%d\n",xsize,ysize,255);
+    for(i=0;i<ysize;i++)
+        fwrite(buf + i * wrap,1,xsize,f);
+    fclose(f);
+}
+
+static void video_decode_example(const char *outfilename, const char *filename)
+{
+    AVCodec *codec;
+    AVCodecContext *c= NULL;
+    int frame, got_picture, len;
+    FILE *f;
+    AVFrame *picture;
+    uint8_t inbuf[INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
+    char buf[1024];
+    AVPacket avpkt;
+
+    av_init_packet(&avpkt);
+
+    /* set end of buffer to 0 (this ensures that no overreading happens for damaged mpeg streams) */
+    memset(inbuf + INBUF_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
+
+    printf("Video decoding\n");
+
+    /* find the mpeg1 video decoder */
+    codec = avcodec_find_decoder(CODEC_ID_MPEG1VIDEO);
+    if (!codec) {
+        fprintf(stderr, "codec not found\n");
+        exit(1);
+    }
+
+    c = avcodec_alloc_context3(codec);
+    picture= avcodec_alloc_frame();
+
+    if(codec->capabilities&CODEC_CAP_TRUNCATED)
+        c->flags|= CODEC_FLAG_TRUNCATED; /* we do not send complete frames */
+
+    /* For some codecs, such as msmpeg4 and mpeg4, width and height
+       MUST be initialized there because this information is not
+       available in the bitstream. */
+
+    /* open it */
+    if (avcodec_open(c, codec) < 0) {
+        fprintf(stderr, "could not open codec\n");
+        exit(1);
+    }
+
+    /* the codec gives us the frame size, in samples */
+
+    f = fopen(filename, "rb");
+    if (!f) {
+        fprintf(stderr, "could not open %s\n", filename);
+        exit(1);
+    }
+
+    frame = 0;
+    for(;;) {
+        avpkt.size = fread(inbuf, 1, INBUF_SIZE, f);
+        if (avpkt.size == 0)
+            break;
+
+        /* NOTE1: some codecs are stream based (mpegvideo, mpegaudio)
+           and this is the only method to use them because you cannot
+           know the compressed data size before analysing it.
+
+           BUT some other codecs (msmpeg4, mpeg4) are inherently frame
+           based, so you must call them with all the data for one
+           frame exactly. You must also initialize 'width' and
+           'height' before initializing them. */
+
+        /* NOTE2: some codecs allow the raw parameters (frame size,
+           sample rate) to be changed at any frame. We handle this, so
+           you should also take care of it */
+
+        /* here, we use a stream based decoder (mpeg1video), so we
+           feed decoder and see if it could decode a frame */
+        avpkt.data = inbuf;
+        while (avpkt.size > 0) {
+            len = avcodec_decode_video2(c, picture, &got_picture, &avpkt);
+            if (len < 0) {
+                fprintf(stderr, "Error while decoding frame %d\n", frame);
+                exit(1);
+            }
+            if (got_picture) {
+                printf("saving frame %3d\n", frame);
+                fflush(stdout);
+
+                /* the picture is allocated by the decoder. no need to
+                   free it */
+                snprintf(buf, sizeof(buf), outfilename, frame);
+                pgm_save(picture->data[0], picture->linesize[0],
+                         c->width, c->height, buf);
+                frame++;
+            }
+            avpkt.size -= len;
+            avpkt.data += len;
+        }
+    }
+
+    /* some codecs, such as MPEG, transmit the I and P frame with a
+       latency of one frame. You must do the following to have a
+       chance to get the last frame of the video */
+    avpkt.data = NULL;
+    avpkt.size = 0;
+    len = avcodec_decode_video2(c, picture, &got_picture, &avpkt);
+    if (got_picture) {
+        printf("saving last frame %3d\n", frame);
+        fflush(stdout);
+
+        /* the picture is allocated by the decoder. no need to
+           free it */
+        snprintf(buf, sizeof(buf), outfilename, frame);
+        pgm_save(picture->data[0], picture->linesize[0],
+                 c->width, c->height, buf);
+        frame++;
+    }
+
+    fclose(f);
+
+    avcodec_close(c);
+    av_free(c);
+    av_free(picture);
+    printf("\n");
+}
+
+int main(int argc, char **argv)
+{
+    const char *filename;
+
+    /* must be called before using avcodec lib */
+    avcodec_init();
+
+    /* register all the codecs */
+    avcodec_register_all();
+
+    if (argc <= 1) {
+        audio_encode_example("/tmp/test.mp2");
+        audio_decode_example("/tmp/test.sw", "/tmp/test.mp2");
+
+        video_encode_example("/tmp/test.mpg");
+        filename = "/tmp/test.mpg";
+    } else {
+        filename = argv[1];
+    }
+
+    //    audio_decode_example("/tmp/test.sw", filename);
+    video_decode_example("/tmp/test%d.pgm", filename);
+
+    return 0;
+}
diff --git a/src/test-native/ffmpeg/avcodec_sample.c b/src/test-native/ffmpeg/avcodec_sample.c
new file mode 100644
index 000000000..f4001b4e6
--- /dev/null
+++ b/src/test-native/ffmpeg/avcodec_sample.c
@@ -0,0 +1,203 @@
+// avcodec_sample.0.5.0.c
+
+// A small sample program that shows how to use libavformat and libavcodec to
+// read video from a file.
+//
+// This version is for the 0.4.9+ release of ffmpeg. This release adds the
+// av_read_frame() API call, which simplifies the reading of video frames 
+// considerably. 
+//
+// Use
+//
+// gcc -o avcodec_sample.0.5.0 avcodec_sample.0.5.0.c -lavformat -lavcodec -lavutil -lswscale -lz -lbz2
+//
+// to build (assuming libavformat, libavcodec, libavutil, and swscale are correctly installed on
+// your system).
+//
+// Run using
+//
+// avcodec_sample.0.5.0 myvideofile.mpg
+//
+// to write the first five frames from "myvideofile.mpg" to disk in PPM
+// format.
+
+#include <libavcodec/avcodec.h>
+#include <libavformat/avformat.h>
+#include <libswscale/swscale.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+static void SaveFrame(AVFrame *pFrame, int width, int height, int iFrame);
+
+int main (int argc, const char * argv[])
+{
+    AVFormatContext *pFormatCtx;
+    int             i, videoStream;
+    AVCodecContext  *pCodecCtx;
+    AVCodec         *pCodec;
+    AVFrame         *pFrame; 
+    AVFrame         *pFrameRGB;
+    AVPacket        packet;
+    int             frameFinished;
+    int             numBytes;
+    uint8_t         *buffer;
+
+    // Register all formats and codecs
+    av_register_all();
+
+    avformat_network_init();
+
+    // Open video file
+    if(avformat_open_input(&pFormatCtx, argv[1], NULL, NULL)!=0)
+        return -1; // Couldn't open file
+
+    // Retrieve stream information
+    if(avformat_find_stream_info(pFormatCtx, NULL)<0)
+        return -1; // Couldn't find stream information
+
+    // Dump information about file onto standard error
+    av_dump_format(pFormatCtx, 0, argv[1], false);
+
+    // Find the first video stream
+    videoStream=-1;
+    for(i=0; i<pFormatCtx->nb_streams; i++)
+        if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO)
+        {
+            videoStream=i;
+            break;
+        }
+    if(videoStream==-1)
+        return -1; // Didn't find a video stream
+
+    // Get a pointer to the codec context for the video stream
+    pCodecCtx=pFormatCtx->streams[videoStream]->codec;
+
+    // Find the decoder for the video stream
+    pCodec=avcodec_find_decoder(pCodecCtx->codec_id);
+    if(pCodec==NULL)
+        return -1; // Codec not found
+
+    // Open codec
+    if(avcodec_open2(pCodecCtx, pCodec, NULL)<0)
+        return -1; // Could not open codec
+
+    // Hack to correct wrong frame rates that seem to be generated by some codecs
+    if(pCodecCtx->time_base.num>1000 && pCodecCtx->time_base.den==1)
+		pCodecCtx->time_base.den=1000;
+		
+    // Allocate video frame
+    pFrame=avcodec_alloc_frame();
+
+    // Allocate an AVFrame structure
+    pFrameRGB=avcodec_alloc_frame();
+    if(pFrameRGB==NULL)
+        return -1;
+
+    // Determine required buffer size and allocate buffer
+    numBytes=avpicture_get_size(PIX_FMT_RGB24, pCodecCtx->width,
+        pCodecCtx->height);
+
+    buffer=malloc(numBytes);
+
+    // Assign appropriate parts of buffer to image planes in pFrameRGB
+    avpicture_fill((AVPicture *)pFrameRGB, buffer, PIX_FMT_RGB24,
+        pCodecCtx->width, pCodecCtx->height);
+
+    // Read frames and save first five frames to disk
+    i=0;
+    while(av_read_frame(pFormatCtx, &packet)>=0)
+    {
+        // Is this a packet from the video stream?
+        if(packet.stream_index==videoStream)
+        {
+            // Decode video frame
+            avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
+
+            // Did we get a video frame?
+            if(frameFinished)
+            {
+				static struct SwsContext *img_convert_ctx;
+
+#if 0
+				// Older removed code
+                // Convert the image from its native format to RGB swscale
+                img_convert((AVPicture *)pFrameRGB, PIX_FMT_RGB24, 
+                    (AVPicture*)pFrame, pCodecCtx->pix_fmt, pCodecCtx->width, 
+                    pCodecCtx->height);
+				
+				// function template, for reference
+				int sws_scale(struct SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,
+							  int srcSliceH, uint8_t* dst[], int dstStride[]);
+#endif
+				// Convert the image into YUV format that SDL uses
+				if(img_convert_ctx == NULL) {
+					int w = pCodecCtx->width;
+					int h = pCodecCtx->height;
+					
+					img_convert_ctx = sws_getContext(w, h, 
+									pCodecCtx->pix_fmt, 
+									w, h, PIX_FMT_RGB24, SWS_BICUBIC,
+									NULL, NULL, NULL);
+					if(img_convert_ctx == NULL) {
+						fprintf(stderr, "Cannot initialize the conversion context!\n");
+						exit(1);
+					}
+				}
+				int ret = sws_scale(img_convert_ctx, pFrame->data, pFrame->linesize, 0, 
+						            pCodecCtx->height, pFrameRGB->data, pFrameRGB->linesize);
+#if 0 // this use to be true, as of 1/2009, but apparently it is no longer true in 3/2009
+				if(ret) {
+					fprintf(stderr, "SWS_Scale failed [%d]!\n", ret);
+					exit(-1);
+				}
+#endif
+                // Save the frame to disk
+                if(i++<=5)
+                    SaveFrame(pFrameRGB, pCodecCtx->width, pCodecCtx->height, i);
+            }
+        }
+
+        // Free the packet that was allocated by av_read_frame
+        av_free_packet(&packet);
+    }
+
+    // Free the RGB image
+    free(buffer);
+    av_free(pFrameRGB);
+
+    // Free the YUV frame
+    av_free(pFrame);
+
+    // Close the codec
+    avcodec_close(pCodecCtx);
+
+    // Close the video file
+    avformat_close_input(&pFormatCtx);
+
+    return 0;
+}
+
+static void SaveFrame(AVFrame *pFrame, int width, int height, int iFrame)
+{
+    FILE *pFile;
+    char szFilename[32];
+    int  y;
+
+    // Open file
+    sprintf(szFilename, "frame%d.ppm", iFrame);
+    pFile=fopen(szFilename, "wb");
+    if(pFile==NULL)
+        return;
+
+    // Write header
+    fprintf(pFile, "P6\n%d %d\n255\n", width, height);
+
+    // Write pixel data
+    for(y=0; y<height; y++)
+        fwrite(pFrame->data[0]+y*pFrame->linesize[0], 1, width*3, pFile);
+
+    // Close file
+    fclose(pFile);
+}
diff --git a/src/test-native/ffmpeg/avcodec_sample.sh b/src/test-native/ffmpeg/avcodec_sample.sh
new file mode 100644
index 000000000..c5ccd6caf
--- /dev/null
+++ b/src/test-native/ffmpeg/avcodec_sample.sh
@@ -0,0 +1,6 @@
+#  -I/usr/include/libavcodec -I/usr/include/libavformat \
+
+gcc \
+  -o avcodec_sample avcodec_sample.c \
+  -lavformat -lavcodec -lavutil -lswscale
+
diff --git a/src/test-native/gst/helloworld-auto.c b/src/test-native/gst/helloworld-auto.c
new file mode 100644
index 000000000..6381c9c93
--- /dev/null
+++ b/src/test-native/gst/helloworld-auto.c
@@ -0,0 +1,112 @@
+#include <gst/gst.h>
+#include <glib.h>
+
+
+static gboolean
+my_bus_callback (GstBus     *bus,
+          GstMessage *msg,
+          gpointer    data)
+{
+  GMainLoop *loop = (GMainLoop *) data;
+
+  switch (GST_MESSAGE_TYPE (msg)) {
+
+    case GST_MESSAGE_EOS:
+      g_print ("End of stream\n");
+      g_main_loop_quit (loop);
+      break;
+
+    case GST_MESSAGE_ERROR: {
+      gchar  *debug;
+      GError *error;
+
+      gst_message_parse_error (msg, &error, &debug);
+      g_free (debug);
+
+      g_printerr ("Error: %s\n", error->message);
+      g_error_free (error);
+
+      g_main_loop_quit (loop);
+      break;
+    }
+    default:
+      break;
+  }
+
+  return TRUE;
+}
+
+
+static gboolean
+idle_exit_loop (gpointer data)
+{
+  g_main_loop_quit ((GMainLoop *) data);
+
+  /* once */
+  return FALSE;
+}
+
+static void
+cb_typefound (GstElement *typefind,
+          guint       probability,
+          GstCaps    *caps,
+          gpointer    data)
+{
+  GMainLoop *loop = data;
+  gchar *type;
+
+  type = gst_caps_to_string (caps);
+  g_print ("Media type %s found, probability %d%%\n", type, probability);
+  g_free (type);
+
+  /* since we connect to a signal in the pipeline thread context, we need
+   * to set an idle handler to exit the main loop in the mainloop context.
+   * Normally, your app should not need to worry about such things. */
+  g_idle_add (idle_exit_loop, loop);
+}
+
+gint 
+main (gint   argc,
+      gchar *argv[])
+{
+  GMainLoop *loop;
+  GstElement *pipeline, *filesrc, *typefind, *fakesink;
+  GstBus *bus;
+
+  /* init GStreamer */
+  gst_init (&argc, &argv);
+  loop = g_main_loop_new (NULL, FALSE);
+
+  /* check args */
+  if (argc != 2) {
+    g_print ("Usage: %s <filename>\n", argv[0]);
+    return -1;
+  }
+
+  /* create a new pipeline to hold the elements */
+  pipeline = gst_pipeline_new ("pipe");
+
+  bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
+  gst_bus_add_watch (bus, my_bus_callback, NULL);
+  gst_object_unref (bus);
+
+  /* create file source and typefind element */
+  filesrc = gst_element_factory_make ("filesrc", "source");
+  g_object_set (G_OBJECT (filesrc), "location", argv[1], NULL);
+  typefind = gst_element_factory_make ("typefind", "typefinder");
+  g_signal_connect (typefind, "have-type", G_CALLBACK (cb_typefound), loop);
+  fakesink = gst_element_factory_make ("fakesink", "sink");
+
+  /* setup */
+  gst_bin_add_many (GST_BIN (pipeline), filesrc, typefind, fakesink, NULL);
+  gst_element_link_many (filesrc, typefind, fakesink, NULL);
+  gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING);
+  g_main_loop_run (loop);
+
+  /* unset */
+  gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_NULL);
+  gst_object_unref (GST_OBJECT (pipeline));
+
+  return 0;
+}
+    
diff --git a/src/test-native/gst/helloworld-playbin.c b/src/test-native/gst/helloworld-playbin.c
new file mode 100644
index 000000000..c5a42fe6c
--- /dev/null
+++ b/src/test-native/gst/helloworld-playbin.c
@@ -0,0 +1,75 @@
+#include <gst/gst.h>
+#include <glib.h>
+
+
+static gboolean
+my_bus_callback (GstBus     *bus,
+          GstMessage *msg,
+          gpointer    data)
+{
+  GMainLoop *loop = (GMainLoop *) data;
+
+  switch (GST_MESSAGE_TYPE (msg)) {
+
+    case GST_MESSAGE_EOS:
+      g_print ("End of stream\n");
+      g_main_loop_quit (loop);
+      break;
+
+    case GST_MESSAGE_ERROR: {
+      gchar  *debug;
+      GError *error;
+
+      gst_message_parse_error (msg, &error, &debug);
+      g_free (debug);
+
+      g_printerr ("Error: %s\n", error->message);
+      g_error_free (error);
+
+      g_main_loop_quit (loop);
+      break;
+    }
+    default:
+      break;
+  }
+
+  return TRUE;
+}
+
+gint
+main (gint   argc,
+      gchar *argv[])
+{
+  GMainLoop *loop;
+  GstElement *play;
+  GstBus *bus;
+
+  /* init GStreamer */
+  gst_init (&argc, &argv);
+  loop = g_main_loop_new (NULL, FALSE);
+
+  /* make sure we have a URI */
+  if (argc != 2) {
+    g_print ("Usage: %s <URI>\n", argv[0]);
+    return -1;
+  }
+
+  /* set up */
+  play = gst_element_factory_make ("playbin", "play");
+  g_object_set (G_OBJECT (play), "uri", argv[1], NULL);
+
+  bus = gst_pipeline_get_bus (GST_PIPELINE (play));
+  gst_bus_add_watch (bus, my_bus_callback, loop);
+  gst_object_unref (bus);
+
+  gst_element_set_state (play, GST_STATE_PLAYING);
+
+  /* now run */
+  g_main_loop_run (loop);
+
+  /* also clean up */
+  gst_element_set_state (play, GST_STATE_NULL);
+  gst_object_unref (GST_OBJECT (play));
+
+  return 0;
+}
diff --git a/src/test-native/gst/helloworld-playbin2.c b/src/test-native/gst/helloworld-playbin2.c
new file mode 100644
index 000000000..b31e3e5c6
--- /dev/null
+++ b/src/test-native/gst/helloworld-playbin2.c
@@ -0,0 +1,75 @@
+#include <gst/gst.h>
+#include <glib.h>
+
+
+static gboolean
+my_bus_callback (GstBus     *bus,
+          GstMessage *msg,
+          gpointer    data)
+{
+  GMainLoop *loop = (GMainLoop *) data;
+
+  switch (GST_MESSAGE_TYPE (msg)) {
+
+    case GST_MESSAGE_EOS:
+      g_print ("End of stream\n");
+      g_main_loop_quit (loop);
+      break;
+
+    case GST_MESSAGE_ERROR: {
+      gchar  *debug;
+      GError *error;
+
+      gst_message_parse_error (msg, &error, &debug);
+      g_free (debug);
+
+      g_printerr ("Error: %s\n", error->message);
+      g_error_free (error);
+
+      g_main_loop_quit (loop);
+      break;
+    }
+    default:
+      break;
+  }
+
+  return TRUE;
+}
+
+gint
+main (gint   argc,
+      gchar *argv[])
+{
+  GMainLoop *loop;
+  GstElement *play;
+  GstBus *bus;
+
+  /* init GStreamer */
+  gst_init (&argc, &argv);
+  loop = g_main_loop_new (NULL, FALSE);
+
+  /* make sure we have a URI */
+  if (argc != 2) {
+    g_print ("Usage: %s <URI>\n", argv[0]);
+    return -1;
+  }
+
+  /* set up */
+  play = gst_element_factory_make ("playbin2", "play");
+  g_object_set (G_OBJECT (play), "uri", argv[1], NULL);
+
+  bus = gst_pipeline_get_bus (GST_PIPELINE (play));
+  gst_bus_add_watch (bus, my_bus_callback, loop);
+  gst_object_unref (bus);
+
+  gst_element_set_state (play, GST_STATE_PLAYING);
+
+  /* now run */
+  g_main_loop_run (loop);
+
+  /* also clean up */
+  gst_element_set_state (play, GST_STATE_NULL);
+  gst_object_unref (GST_OBJECT (play));
+
+  return 0;
+}
diff --git a/src/test-native/gst/helloworld.c b/src/test-native/gst/helloworld.c
new file mode 100644
index 000000000..6d991898d
--- /dev/null
+++ b/src/test-native/gst/helloworld.c
@@ -0,0 +1,142 @@
+#include <gst/gst.h>
+#include <glib.h>
+
+
+static gboolean
+bus_call (GstBus     *bus,
+          GstMessage *msg,
+          gpointer    data)
+{
+  GMainLoop *loop = (GMainLoop *) data;
+
+  switch (GST_MESSAGE_TYPE (msg)) {
+
+    case GST_MESSAGE_EOS:
+      g_print ("End of stream\n");
+      g_main_loop_quit (loop);
+      break;
+
+    case GST_MESSAGE_ERROR: {
+      gchar  *debug;
+      GError *error;
+
+      gst_message_parse_error (msg, &error, &debug);
+      g_free (debug);
+
+      g_printerr ("Error: %s\n", error->message);
+      g_error_free (error);
+
+      g_main_loop_quit (loop);
+      break;
+    }
+    default:
+      break;
+  }
+
+  return TRUE;
+}
+
+
+static void
+on_pad_added (GstElement *element,
+              GstPad     *pad,
+              gpointer    data)
+{
+  GstPad *sinkpad;
+  GstElement *decoder = (GstElement *) data;
+
+  /* We can now link this pad with the vorbis-decoder sink pad */
+  g_print ("Dynamic pad created, linking demuxer/decoder\n");
+
+  sinkpad = gst_element_get_static_pad (decoder, "sink");
+
+  gst_pad_link (pad, sinkpad);
+
+  gst_object_unref (sinkpad);
+}
+
+
+
+int
+main (int   argc,
+      char *argv[])
+{
+  GMainLoop *loop;
+
+  GstElement *pipeline, *source, *demuxer, *decoder, *conv, *sink;
+  GstBus *bus;
+
+  /* Initialisation */
+  gst_init (&argc, &argv);
+
+  loop = g_main_loop_new (NULL, FALSE);
+
+
+  /* Check input arguments */
+  if (argc != 2) {
+    g_printerr ("Usage: %s <Ogg/Vorbis filename>\n", argv[0]);
+    return -1;
+  }
+
+
+  /* Create gstreamer elements */
+  pipeline = gst_pipeline_new ("audio-player");
+  source   = gst_element_factory_make ("filesrc",       "file-source");
+  demuxer  = gst_element_factory_make ("oggdemux",      "ogg-demuxer");
+  decoder  = gst_element_factory_make ("vorbisdec",     "vorbis-decoder");
+  conv     = gst_element_factory_make ("audioconvert",  "converter");
+  sink     = gst_element_factory_make ("autoaudiosink", "audio-output");
+
+  if (!pipeline || !source || !demuxer || !decoder || !conv || !sink) {
+    g_printerr ("One element could not be created. Exiting.\n");
+    return -1;
+  }
+
+  /* Set up the pipeline */
+
+  /* we set the input filename to the source element */
+  g_object_set (G_OBJECT (source), "location", argv[1], NULL);
+
+  /* we add a message handler */
+  bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
+  gst_bus_add_watch (bus, bus_call, loop);
+  gst_object_unref (bus);
+
+  /* we add all elements into the pipeline */
+  /* file-source | ogg-demuxer | vorbis-decoder | converter | alsa-output */
+  gst_bin_add_many (GST_BIN (pipeline),
+                    source, demuxer, decoder, conv, sink, NULL);
+
+  /* we link the elements together */
+  /* file-source -> ogg-demuxer ~> vorbis-decoder -> converter -> alsa-output */
+  gst_element_link (source, demuxer);
+  gst_element_link_many (decoder, conv, sink, NULL);
+  g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added), decoder);
+
+  /* note that the demuxer will be linked to the decoder dynamically.
+     The reason is that Ogg may contain various streams (for example
+     audio and video). The source pad(s) will be created at run time,
+     by the demuxer when it detects the amount and nature of streams.
+     Therefore we connect a callback function which will be executed
+     when the "pad-added" is emitted.*/
+
+
+  /* Set the pipeline to "playing" state*/
+  g_print ("Now playing: %s\n", argv[1]);
+  gst_element_set_state (pipeline, GST_STATE_PLAYING);
+
+
+  /* Iterate */
+  g_print ("Running...\n");
+  g_main_loop_run (loop);
+
+
+  /* Out of the main loop, clean up nicely */
+  g_print ("Returned, stopping playback\n");
+  gst_element_set_state (pipeline, GST_STATE_NULL);
+
+  g_print ("Deleting pipeline\n");
+  gst_object_unref (GST_OBJECT (pipeline));
+
+  return 0;
+}
diff --git a/src/test-native/gst/make.sh b/src/test-native/gst/make.sh
new file mode 100644
index 000000000..23e54a272
--- /dev/null
+++ b/src/test-native/gst/make.sh
@@ -0,0 +1,5 @@
+gcc -Wall helloworld.c -o helloworld $(pkg-config --cflags --libs gstreamer-0.10)
+gcc -Wall helloworld-auto.c -o helloworld-auto $(pkg-config --cflags --libs gstreamer-0.10)
+gcc -Wall helloworld-playbin.c -o helloworld-playbin $(pkg-config --cflags --libs gstreamer-0.10)
+gcc -Wall helloworld-playbin2.c -o helloworld-playbin2 $(pkg-config --cflags --libs gstreamer-0.10)
+