sfdec: add taglist support

Map the metadata strings and a bunch of info-fields to GStreamer tags.

1 files changed, 111 insertions, 1 deletions

diff --git a/ext/sndfile/gstsfdec.c b/ext/sndfile/gstsfdec.c
index ba8b49683..31a84a983 100644
--- a/ext/sndfile/gstsfdec.c
+++ b/ext/sndfile/gstsfdec.c
@@ -21,10 +21,11 @@
 #  include "config.h"
 #endif
 
+#include <stdlib.h>
 #include <gst/gst-i18n-plugin.h>
+#include <gst/audio/audio.h>
 
 #include "gstsfdec.h"
-#include <gst/audio/audio.h>
 
 enum
 {
@@ -355,11 +356,15 @@ static gboolean
 gst_sf_dec_open_file (GstSFDec * self)
 {
   SF_INFO info = { 0, };
+  SF_LOOP_INFO loop_info = { 0, };
   GstCaps *caps;
   GstStructure *s;
   GstSegment seg;
+  GstTagList *tags;
   gint width;
   const gchar *format;
+  const gchar *tag;
+  const gchar *codec_name;
   gchar *stream_id;
 
   GST_DEBUG_OBJECT (self, "opening the stream");
@@ -413,10 +418,115 @@ gst_sf_dec_open_file (GstSFDec * self)
   gst_pad_set_caps (self->srcpad, caps);
   gst_caps_unref (caps);
 
+  /* push initial segment */
   gst_segment_init (&seg, GST_FORMAT_TIME);
   seg.stop = gst_util_uint64_scale_int (self->duration, GST_SECOND, self->rate);
   gst_pad_push_event (self->srcpad, gst_event_new_segment (&seg));
 
+  /* get extra details */
+  if (sf_command (self->file, SFC_GET_LOOP_INFO, &loop_info,
+          sizeof (loop_info))) {
+    GST_DEBUG_OBJECT (self, "have loop info");
+  }
+
+  /* send tags */
+  tags = gst_tag_list_new_empty ();
+  if ((tag = sf_get_string (self->file, SF_STR_TITLE))) {
+    gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_TITLE, tag, NULL);
+  }
+  if ((tag = sf_get_string (self->file, SF_STR_COMMENT))) {
+    gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_COMMENT, tag, NULL);
+  }
+  if ((tag = sf_get_string (self->file, SF_STR_ARTIST))) {
+    gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_ARTIST, tag, NULL);
+  }
+  if ((tag = sf_get_string (self->file, SF_STR_ALBUM))) {
+    gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_ALBUM, tag, NULL);
+  }
+  if ((tag = sf_get_string (self->file, SF_STR_GENRE))) {
+    gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_GENRE, tag, NULL);
+  }
+  if ((tag = sf_get_string (self->file, SF_STR_COPYRIGHT))) {
+    gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_COPYRIGHT, tag, NULL);
+  }
+  if ((tag = sf_get_string (self->file, SF_STR_LICENSE))) {
+    gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_LICENSE, tag, NULL);
+  }
+  if ((tag = sf_get_string (self->file, SF_STR_SOFTWARE))) {
+    gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_APPLICATION_NAME, tag,
+        NULL);
+  }
+  if ((tag = sf_get_string (self->file, SF_STR_TRACKNUMBER))) {
+    guint track = atoi (tag);
+    gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_TRACK_NUMBER, track,
+        NULL);
+  }
+  if (loop_info.bpm != 0.0) {
+    gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_BEATS_PER_MINUTE,
+        (gdouble) loop_info.bpm, NULL);
+  }
+  /* TODO: SF_STR_DATE: GST_TAG_DATE / GST_TAG_DATE_TIME */
+  /* TODO: calculate bitrate: GST_TAG_BITRATE */
+  switch (info.format & SF_FORMAT_SUBMASK) {
+    case SF_FORMAT_PCM_S8:
+    case SF_FORMAT_PCM_16:
+    case SF_FORMAT_PCM_24:
+    case SF_FORMAT_PCM_32:
+    case SF_FORMAT_PCM_U8:
+      codec_name = "Uncompressed PCM audio";
+      break;
+    case SF_FORMAT_FLOAT:
+    case SF_FORMAT_DOUBLE:
+      codec_name = "Uncompressed IEEE float audio";
+      break;
+    case SF_FORMAT_ULAW:
+      codec_name = "µ-law audio";
+      break;
+    case SF_FORMAT_ALAW:
+      codec_name = "A-law audio";
+      break;
+    case SF_FORMAT_IMA_ADPCM:
+    case SF_FORMAT_MS_ADPCM:
+    case SF_FORMAT_VOX_ADPCM:
+    case SF_FORMAT_G721_32:
+    case SF_FORMAT_G723_24:
+    case SF_FORMAT_G723_40:
+      codec_name = "ADPCM audio";
+      break;
+    case SF_FORMAT_GSM610:
+      codec_name = "MS GSM audio";
+      break;
+    case SF_FORMAT_DWVW_12:
+    case SF_FORMAT_DWVW_16:
+    case SF_FORMAT_DWVW_24:
+    case SF_FORMAT_DWVW_N:
+      codec_name = "Delta Width Variable Word encoded audio";
+      break;
+    case SF_FORMAT_DPCM_8:
+    case SF_FORMAT_DPCM_16:
+      codec_name = "differential PCM audio";
+      break;
+    case SF_FORMAT_VORBIS:
+      codec_name = "Vorbis";
+      break;
+    default:
+      codec_name = NULL;
+      GST_WARNING_OBJECT (self, "unmapped codec_type: %d",
+          info.format & SF_FORMAT_SUBMASK);
+      break;
+  }
+  if (codec_name) {
+    gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_AUDIO_CODEC,
+        codec_name, NULL);
+  }
+
+  if (!gst_tag_list_is_empty (tags)) {
+    GST_DEBUG_OBJECT (self, "have tags");
+    gst_pad_push_event (self->srcpad, gst_event_new_tag (tags));
+  } else {
+    gst_tag_list_unref (tags);
+  }
+
   return TRUE;
 
 open_failed: