diff options
Diffstat (limited to 'examples')
-rw-r--r-- | examples/app/.gitignore | 1 | ||||
-rw-r--r-- | examples/app/Makefile.am | 9 | ||||
-rw-r--r-- | examples/app/appsink-src.c | 190 |
3 files changed, 199 insertions, 1 deletions
diff --git a/examples/app/.gitignore b/examples/app/.gitignore index eeae0e65e..8a2c76152 100644 --- a/examples/app/.gitignore +++ b/examples/app/.gitignore @@ -3,3 +3,4 @@ appsrc-ra appsrc-seekable appsrc-stream appsrc-stream2 +appsink-src diff --git a/examples/app/Makefile.am b/examples/app/Makefile.am index fc4b9419d..4f3df7779 100644 --- a/examples/app/Makefile.am +++ b/examples/app/Makefile.am @@ -1,6 +1,6 @@ noinst_PROGRAMS = appsrc_ex appsrc-stream appsrc-stream2 appsrc-ra \ - appsrc-seekable + appsrc-seekable appsink-src appsrc_ex_SOURCES = appsrc_ex.c appsrc_ex_CFLAGS = $(GST_CFLAGS) $(GCONF_CFLAGS) @@ -23,3 +23,10 @@ appsrc_ra_LDFLAGS = $(GST_LIBS) appsrc_seekable_SOURCES = appsrc-seekable.c appsrc_seekable_CFLAGS = $(GST_CFLAGS) $(GCONF_CFLAGS) appsrc_seekable_LDFLAGS = $(GST_LIBS) + +appsink_src_SOURCES = appsink-src.c +appsink_src_CFLAGS = $(GST_CFLAGS) $(GCONF_CFLAGS) +appsink_src_LDFLAGS = \ + $(GST_LIBS) \ + $(top_builddir)/gst-libs/gst/app/libgstapp-@GST_MAJORMINOR@.la + diff --git a/examples/app/appsink-src.c b/examples/app/appsink-src.c new file mode 100644 index 000000000..6472af30a --- /dev/null +++ b/examples/app/appsink-src.c @@ -0,0 +1,190 @@ +#include <gst/gst.h> + +#include <string.h> + +#include <gst/app/gstappsrc.h> +#include <gst/app/gstappsink.h> +#include <gst/app/gstappbuffer.h> + +/* these are the caps we are going to pass through the appsink and appsrc */ +const gchar *audio_caps = + "audio/x-raw-int,channels=1,rate=8000,signed=(boolean)true,width=16,depth=16,endianness=1234"; + +typedef struct +{ + GMainLoop *loop; + GstElement *source; + GstElement *sink; +} ProgramData; + +/* called when the appsink notifies us that there is a new buffer ready for + * processing */ +static void +on_new_buffer_from_source (GstElement * elt, ProgramData * data) +{ + guint size; + gpointer raw_buffer; + GstBuffer *app_buffer, *buffer; + GstElement *source; + + /* get the buffer from appsink */ + buffer = gst_app_sink_pull_buffer (GST_APP_SINK (elt)); + + /* turn it into an app buffer, it's not really needed, we could simply push + * the retrieved buffer from appsink into appsrc just fine. */ + size = GST_BUFFER_SIZE (buffer); + g_print ("Pushing a buffer of size %d\n", size); + raw_buffer = g_malloc0 (size); + memcpy (raw_buffer, GST_BUFFER_DATA (buffer), size); + app_buffer = gst_app_buffer_new (raw_buffer, size, g_free, raw_buffer); + + /* we don't need the appsink buffer anymore */ + gst_buffer_unref (buffer); + + /* newer basesrc will set caps for use automatically but it does not really + * hurt to set it on the buffer again */ + gst_buffer_set_caps (app_buffer, GST_BUFFER_CAPS (buffer)); + source = gst_bin_get_by_name (GST_BIN (data->sink), "testsource"); + gst_app_src_push_buffer (GST_APP_SRC (source), app_buffer); +} + +/* called when we get a GstMessage from the source pipeline when we get EOS, we + * notify the appsrc of it. */ +static gboolean +on_source_message (GstBus * bus, GstMessage * message, ProgramData * data) +{ + GstElement *source; + + switch (GST_MESSAGE_TYPE (message)) { + case GST_MESSAGE_EOS: + g_print ("The source got dry\n"); + source = gst_bin_get_by_name (GST_BIN (data->sink), "testsource"); + gst_app_src_end_of_stream (GST_APP_SRC (source)); + break; + case GST_MESSAGE_ERROR: + g_print ("Received error\n"); + g_main_loop_quit (data->loop); + break; + default: + break; + } + return TRUE; +} + +/* called when we get a GstMessage from the sink pipeline when we get EOS, we + * exit the mainloop and this testapp. */ +static gboolean +on_sink_message (GstBus * bus, GstMessage * message, ProgramData * data) +{ + /* nil */ + switch (GST_MESSAGE_TYPE (message)) { + case GST_MESSAGE_EOS: + g_print ("Finished playback\n"); + g_main_loop_quit (data->loop); + break; + case GST_MESSAGE_ERROR: + g_print ("Received error\n"); + g_main_loop_quit (data->loop); + break; + default: + break; + } + return TRUE; +} + +int +main (int argc, char *argv[]) +{ + gchar *filename = NULL; + ProgramData *data = NULL; + gchar *string = NULL; + GstBus *bus = NULL; + GstElement *testsink = NULL; + GstElement *testsource = NULL; + + gst_init (&argc, &argv); + + if (argc == 2) + filename = g_strdup (argv[1]); + else + filename = g_strdup ("/usr/share/sounds/ekiga/ring.wav"); + + data = g_new0 (ProgramData, 1); + + data->loop = g_main_loop_new (NULL, FALSE); + + /* setting up source pipeline, we read from a file and convert to our desired + * caps. */ + string = + g_strdup_printf + ("filesrc location=\"%s\" ! wavparse ! audioconvert ! audioresample ! appsink caps=\"%s\" name=testsink", + filename, audio_caps); + g_free (filename); + data->source = gst_parse_launch (string, NULL); + g_free (string); + + if (data->source == NULL) { + g_print ("Bad source\n"); + return -1; + } + + /* to be notified of messages from this pipeline, mostly EOS */ + bus = gst_element_get_bus (data->source); + gst_bus_add_watch (bus, (GstBusFunc) on_source_message, data); + gst_object_unref (bus); + + /* we use appsink in push mode, it sends us a signal when data is available + * and we pull out the data in the signal callback. We want the appsink to + * push as fast as it can, hence the sync=false */ + testsink = gst_bin_get_by_name (GST_BIN (data->source), "testsink"); + g_object_set (G_OBJECT (testsink), "emit-signals", TRUE, "sync", FALSE, NULL); + g_signal_connect (testsink, "new-buffer", + G_CALLBACK (on_new_buffer_from_source), data); + gst_object_unref (testsink); + + /* setting up sink pipeline, we push audio data into this pipeline that will + * then play it back using the default audio sink. We have no blocking + * behaviour on the src which means that we will push the entire file into + * memory. */ + string = + g_strdup_printf ("appsrc name=testsource caps=\"%s\" ! autoaudiosink", + audio_caps); + data->sink = gst_parse_launch (string, NULL); + g_free (string); + + if (data->sink == NULL) { + g_print ("Bad sink\n"); + return -1; + } + + testsource = gst_bin_get_by_name (GST_BIN (data->sink), "testsource"); + /* configure for time-based format */ + g_object_set (testsource, "format", GST_FORMAT_TIME, NULL); + /* uncomment the next line to block when appsrc has buffered enough */ + /* g_object_set (testsource, "block", TRUE, NULL); */ + gst_object_unref (testsource); + + bus = gst_element_get_bus (data->sink); + gst_bus_add_watch (bus, (GstBusFunc) on_sink_message, data); + gst_object_unref (bus); + + /* launching things */ + gst_element_set_state (data->sink, GST_STATE_PLAYING); + gst_element_set_state (data->source, GST_STATE_PLAYING); + + /* let's run !, this loop will quit when the sink pipeline goes EOS or when an + * error occurs in the source or sink pipelines. */ + g_print ("Let's run!\n"); + g_main_loop_run (data->loop); + g_print ("Going out\n"); + + gst_element_set_state (data->source, GST_STATE_NULL); + gst_element_set_state (data->sink, GST_STATE_NULL); + + gst_object_unref (data->source); + gst_object_unref (data->sink); + g_main_loop_unref (data->loop); + g_free (data); + + return 0; +} |