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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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89 lines
2.7 KiB
C
89 lines
2.7 KiB
C
#include <stdlib.h>
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#include <gst/gst.h>
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gboolean playing;
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/* eos will be called when the src element has an end of stream */
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void eos(GstElement *element)
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{
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g_print("have eos, quitting\n");
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playing = FALSE;
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}
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int main(int argc,char *argv[])
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{
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GstElement *bin, *disksrc, *parse, *decoder, *downmix, *mulaw, *mulawdec, *osssink;
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gst_init(&argc,&argv);
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if (argc != 2) {
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g_print("usage: %s <filename>\n", argv[0]);
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exit(-1);
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}
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/* create a new bin to hold the elements */
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bin = gst_pipeline_new("pipeline");
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/* create a disk reader */
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disksrc = gst_elementfactory_make("disksrc", "disk_source");
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g_object_set(G_OBJECT(disksrc),"location", argv[1],NULL);
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g_signal_connect(G_OBJECT(disksrc),"eos",
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G_CALLBACK(eos),NULL);
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/* now it's time to get the parser */
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parse = gst_elementfactory_make("mp3parse","parse");
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decoder = gst_elementfactory_make("mpg123","decoder");
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downmix = gst_elementfactory_make("stereo2mono","stereo2mono");
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mulaw = gst_elementfactory_make("mulawencode","mulaw");
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mulawdec = gst_elementfactory_make("mulawdecode","mulawdec");
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/* and an audio sink */
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osssink = gst_elementfactory_make("osssink", "play_audio");
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/* add objects to the main pipeline */
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gst_bin_add(GST_BIN(bin), disksrc);
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gst_bin_add(GST_BIN(bin), parse);
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gst_bin_add(GST_BIN(bin), decoder);
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gst_bin_add(GST_BIN(bin), downmix);
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gst_bin_add(GST_BIN(bin), mulaw);
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gst_bin_add(GST_BIN(bin), mulawdec);
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gst_bin_add(GST_BIN(bin), osssink);
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/* connect src to sink */
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gst_pad_connect(gst_element_get_pad(disksrc,"src"),
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gst_element_get_pad(parse,"sink"));
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gst_pad_connect(gst_element_get_pad(parse,"src"),
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gst_element_get_pad(decoder,"sink"));
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gst_pad_connect(gst_element_get_pad(decoder,"src"),
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gst_element_get_pad(downmix,"sink"));
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gst_pad_connect(gst_element_get_pad(downmix,"src"),
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gst_element_get_pad(mulaw,"sink"));
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gst_pad_connect(gst_element_get_pad(mulaw,"src"),
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gst_element_get_pad(mulawdec,"sink"));
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gst_pad_connect(gst_element_get_pad(mulawdec,"src"),
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gst_element_get_pad(osssink,"sink"));
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/* start playing */
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gst_element_set_state(bin, GST_STATE_PLAYING);
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playing = TRUE;
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while (playing) {
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gst_bin_iterate(GST_BIN(bin));
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}
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/* stop the bin */
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gst_element_set_state(bin, GST_STATE_NULL);
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gst_object_destroy(GST_OBJECT(osssink));
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gst_object_destroy(GST_OBJECT(parse));
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gst_object_destroy(GST_OBJECT(decoder));
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gst_object_destroy(GST_OBJECT(downmix));
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gst_object_destroy(GST_OBJECT(mulaw));
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gst_object_destroy(GST_OBJECT(mulawdec));
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gst_object_destroy(GST_OBJECT(disksrc));
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gst_object_destroy(GST_OBJECT(bin));
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exit(0);
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}
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