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Added vorbis stream info extraction example
Original commit message from CVS: Added vorbis stream info extraction example
This commit is contained in:
Wim Taymans
parent
ea619028c7
commit
9c07101831
2 changed files with 314 additions and 2 deletions
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@ -1,7 +1,7 @@
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examples = seek spider_seek cdplayer cdparanoia
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examples = seek spider_seek cdplayer cdparanoia vorbisfile
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noinst_PROGRAMS = $(examples)
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# we have nothing but apps here, we can do this safely
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LIBS = $(GST_LIBS) $(GTK_LIBS) $(FT2_LIBS)
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AM_CFLAGS = $(GST_CFLAGS) $(GTK_CFLAGS) $(FT2_CFLAGS)
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AM_CFLAGS = $(GST_CFLAGS) $(GTK_CFLAGS)
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312
examples/seeking/vorbisfile.c
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312
examples/seeking/vorbisfile.c
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@ -0,0 +1,312 @@
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#include <stdlib.h>
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#include <gst/gst.h>
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#include <string.h>
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static gboolean ready = FALSE;
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struct probe_context {
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GstElement *pipeline;
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GstElement *element;
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GstPad *pad;
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GstFormat ls_format;
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gint total_ls;
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GstCaps *metadata;
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GstCaps *caps;
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};
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static void
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print_metadata (GstCaps *caps)
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{
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g_print (" metadata:\n");
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if (!caps || caps->properties == NULL) {
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g_print (" none\n");
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return;
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}
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if (!strcmp (gst_caps_get_mime (caps), "application/x-gst-metadata")) {
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GstProps *props = caps->properties;
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GList *walk = props->properties;
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while (walk) {
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GstPropsEntry *entry = (GstPropsEntry *) walk->data;
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const gchar *name;
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const gchar *str_val;
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gint int_val;
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GstPropsType type;
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name = gst_props_entry_get_name (entry);
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type = gst_props_entry_get_type (entry);
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switch (type) {
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case GST_PROPS_STRING_TYPE:
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gst_props_entry_get_string (entry, &str_val);
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g_print (" %s='%s'\n", name, str_val);
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break;
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case GST_PROPS_INT_TYPE:
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gst_props_entry_get_int (entry, &int_val);
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g_print (" %s=%d\n", name, int_val);
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break;
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default:
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break;
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}
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walk = g_list_next (walk);
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}
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}
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else {
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g_print (" unkown metadata type\n");
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}
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}
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static void
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print_format (GstCaps *caps)
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{
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g_print (" format:\n");
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if (!caps || caps->properties == NULL) {
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g_print (" unkown\n");
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return;
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}
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if (!strcmp (gst_caps_get_mime (caps), "audio/raw")) {
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gint channels;
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gint rate;
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gst_caps_get_int (caps, "channels", &channels);
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gst_caps_get_int (caps, "rate", &rate);
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g_print (" channels: %d\n", channels);
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g_print (" rate: %d\n", rate);
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}
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else {
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g_print (" unkown format\n");
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}
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}
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static void
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print_lbs_info (struct probe_context *context, gint stream)
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{
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const GstFormat *formats;
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g_print (" stream info:\n");
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/* report info in all supported formats */
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formats = gst_pad_get_formats (context->pad);
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while (*formats) {
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const GstFormatDefinition *definition;
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gint64 value_start, value_end;
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gboolean res;
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GstFormat format;
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if (*formats == context->ls_format) {
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formats++;
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continue;
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}
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definition = gst_format_get_details (*formats);
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/* get start and end position of this stream */
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format = *formats;
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res = gst_pad_convert (context->pad,
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context->ls_format, stream,
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&format, &value_start);
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res &= gst_pad_convert (context->pad,
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context->ls_format, stream + 1,
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&format, &value_end);
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if (res) {
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/* substract to get the length */
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value_end -= value_start;
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if (*formats == GST_FORMAT_TIME) {
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value_end /= (GST_SECOND/100);
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g_print (" %s: %lld:%02lld.%02lld\n", definition->nick,
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value_end/6000, (value_end/100)%60, (value_end%100));
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}
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else {
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g_print (" %s: %lld\n", definition->nick, value_end);
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}
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}
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else
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g_print (" could not get logical stream %s\n", definition->nick);
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formats++;
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}
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}
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static void
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deep_notify (GObject *object, GstObject *origin,
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GParamSpec *pspec, gpointer data)
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{
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struct probe_context *context = (struct probe_context *) data;
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GValue value = { 0, };
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if (!strcmp (pspec->name, "metadata")) {
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g_value_init (&value, pspec->value_type);
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g_object_get_property (G_OBJECT (origin), pspec->name, &value);
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context->metadata = g_value_peek_pointer (&value);
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}
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else if (!strcmp (pspec->name, "caps")) {
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if (GST_IS_PAD (origin) && GST_PAD (origin) == context->pad) {
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g_value_init (&value, pspec->value_type);
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g_object_get_property (G_OBJECT (origin), pspec->name, &value);
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context->caps = g_value_peek_pointer (&value);
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ready = TRUE;
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}
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}
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}
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static gboolean
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collect_logical_stream_properties (struct probe_context *context, gint stream)
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{
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GstEvent *event;
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gboolean res;
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gint count;
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g_print ("info for logical stream %d:\n", stream);
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/* seek to stream */
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event = gst_event_new_seek (context->ls_format |
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GST_SEEK_METHOD_SET |
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GST_SEEK_FLAG_FLUSH,
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stream);
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res = gst_pad_send_event (context->pad, event);
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if (!res) {
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g_warning ("seek to logical track failed");
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return FALSE;
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}
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/* run the pipeline to get the info */
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count = 0;
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ready = FALSE;
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while (gst_bin_iterate (GST_BIN (context->pipeline)) && !ready) {
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count++;
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if (count > 10) break;
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}
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print_metadata (context->metadata);
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print_format (context->caps);
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print_lbs_info (context, stream);
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g_print ("\n");
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return TRUE;
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}
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static void
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collect_stream_properties (struct probe_context *context)
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{
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const GstFormat *formats;
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ready = FALSE;
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while (gst_bin_iterate (GST_BIN (context->pipeline)) && !ready);
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g_print ("stream info:\n");
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context->total_ls = -1;
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/* report info in all supported formats */
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formats = gst_pad_get_formats (context->pad);
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while (*formats) {
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const GstFormatDefinition *definition;
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gint64 value;
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gboolean res;
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GstFormat format;
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format = *formats;
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res = gst_pad_query (context->pad, GST_PAD_QUERY_TOTAL,
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&format, &value);
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definition = gst_format_get_details (*formats);
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if (res) {
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if (format == GST_FORMAT_TIME) {
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value /= (GST_SECOND/100);
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g_print (" total %s: %lld:%02lld.%02lld\n", definition->nick,
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value/6000, (value/100)%60, (value%100));
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}
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else {
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if (format == context->ls_format)
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context->total_ls = value;
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g_print (" total %s: %lld\n", definition->nick, value);
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}
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}
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formats++;
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}
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if (context->total_ls == -1) {
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g_warning (" could not get number of logical streams");
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}
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g_print ("\n");
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}
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int
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main (int argc, char **argv)
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{
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GstElement *pipeline;
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GstElement *filesrc;
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GstElement *vorbisfile;
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GstPad *pad;
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GstFormat logical_stream_format;
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struct probe_context *context;
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gint stream;
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gst_init (&argc, &argv);
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if (argc < 2) {
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g_print ("usage: %s <oggfile>\n", argv[0]);
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return (-1);
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}
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pipeline = gst_pipeline_new ("pipeline");
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filesrc = gst_element_factory_make ("filesrc", "filesrc");
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g_assert (filesrc);
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g_object_set (G_OBJECT (filesrc), "location", argv[1], NULL);
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vorbisfile = gst_element_factory_make ("vorbisfile", "vorbisfile");
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g_assert (vorbisfile);
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gst_bin_add (GST_BIN (pipeline), filesrc);
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gst_bin_add (GST_BIN (pipeline), vorbisfile);
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gst_element_connect_pads (filesrc, "src", vorbisfile, "sink");
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pad = gst_element_get_pad (vorbisfile, "src");
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g_assert (pad);
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logical_stream_format = gst_format_get_by_nick ("logical_stream");
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g_assert (logical_stream_format != 0);
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context = g_new0 (struct probe_context, 1);
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context->pipeline = pipeline;
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context->element = vorbisfile;
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context->pad = pad;
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context->ls_format = logical_stream_format;
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g_signal_connect (G_OBJECT (pipeline), "deep_notify",
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G_CALLBACK (deep_notify), context);
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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/* at this point we can inspect the stream */
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collect_stream_properties (context);
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/* loop over all logical streams to get info */
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stream = 0;
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while (stream < context->total_ls) {
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collect_logical_stream_properties (context, stream);
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stream++;
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}
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/* stop probe */
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gst_element_set_state (pipeline, GST_STATE_NULL);
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gst_buffer_print_stats();
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gst_event_print_stats();
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return 0;
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}
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