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matroskamux: don't output empty tags/tag elements

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Such files will not play on Android, because of bug in libwebm matroska parsing, which is still present in 6.0.1

https://bugzilla.gnome.org/show_bug.cgi?id=762349
This commit is contained in:
Matej Knopp 2016-02-19 23:44:42 +01:00 committed by Sebastian Dröge
parent 6861d11c49
commit 8657987f8f
1 changed files with 68 additions and 32 deletions
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100
gst/matroska/matroska-mux.c
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@ -251,6 +251,7 @@ static gboolean flac_streamheader_to_codecdata (const GValue * streamheader,
static void
gst_matroska_mux_write_simple_tag (const GstTagList * list, const gchar * tag,
gpointer data);
static gboolean gst_matroska_mux_tag_list_is_empty (const GstTagList * list);
static void gst_matroska_mux_write_streams_tags (GstMatroskaMux * mux);
static gboolean gst_matroska_mux_streams_have_tags (GstMatroskaMux * mux);
@ -2790,7 +2791,7 @@ gst_matroska_mux_start (GstMatroskaMux * mux)
/* tags */
tags = gst_tag_setter_get_tag_list (GST_TAG_SETTER (mux));
has_main_tags = tags != NULL && !gst_tag_list_is_empty (tags);
has_main_tags = tags != NULL && !gst_matroska_mux_tag_list_is_empty (tags);
if (has_main_tags || gst_matroska_mux_streams_have_tags (mux)) {
guint64 master_tags, master_tag;
@ -2957,41 +2958,74 @@ gst_matroska_mux_start (GstMatroskaMux * mux)
#endif
}
/* TODO: more sensible tag mappings */
static const struct
{
const gchar *matroska_tagname;
const gchar *gstreamer_tagname;
}
gst_matroska_tag_conv[] = {
{
GST_MATROSKA_TAG_ID_TITLE, GST_TAG_TITLE}, {
GST_MATROSKA_TAG_ID_ARTIST, GST_TAG_ARTIST}, {
GST_MATROSKA_TAG_ID_ALBUM, GST_TAG_ALBUM}, {
GST_MATROSKA_TAG_ID_COMMENTS, GST_TAG_COMMENT}, {
GST_MATROSKA_TAG_ID_BITSPS, GST_TAG_BITRATE}, {
GST_MATROSKA_TAG_ID_BPS, GST_TAG_BITRATE}, {
GST_MATROSKA_TAG_ID_ENCODER, GST_TAG_ENCODER}, {
GST_MATROSKA_TAG_ID_DATE, GST_TAG_DATE}, {
GST_MATROSKA_TAG_ID_ISRC, GST_TAG_ISRC}, {
GST_MATROSKA_TAG_ID_COPYRIGHT, GST_TAG_COPYRIGHT}, {
GST_MATROSKA_TAG_ID_BPM, GST_TAG_BEATS_PER_MINUTE}, {
GST_MATROSKA_TAG_ID_TERMS_OF_USE, GST_TAG_LICENSE}, {
GST_MATROSKA_TAG_ID_COMPOSER, GST_TAG_COMPOSER}, {
GST_MATROSKA_TAG_ID_LEAD_PERFORMER, GST_TAG_PERFORMER}, {
GST_MATROSKA_TAG_ID_GENRE, GST_TAG_GENRE}
};
/* Every stagefright implementation on android up to and including 6.0.1 is using
libwebm with bug in matroska parsing, where it will choke on empty tag elements;
so before outputting tags and tag elements we better make sure that there are
actually tags we are going to write */
static gboolean
gst_matroska_mux_tag_list_is_empty (const GstTagList * list)
{
int i;
for (i = 0; i < gst_tag_list_n_tags (list); i++) {
const gchar *tag = gst_tag_list_nth_tag_name (list, i);
int i;
for (i = 0; i < G_N_ELEMENTS (gst_matroska_tag_conv); i++) {
const gchar *tagname_gst = gst_matroska_tag_conv[i].gstreamer_tagname;
if (strcmp (tagname_gst, tag) == 0) {
GValue src = { 0, };
gchar *dest;
if (!gst_tag_list_copy_value (&src, list, tag))
break;
dest = gst_value_serialize (&src);
g_value_unset (&src);
if (dest) {
g_free (dest);
return FALSE;
}
}
}
}
return TRUE;
}
static void
gst_matroska_mux_write_simple_tag (const GstTagList * list, const gchar * tag,
gpointer data)
{
/* TODO: more sensible tag mappings */
static const struct
{
const gchar *matroska_tagname;
const gchar *gstreamer_tagname;
}
tag_conv[] = {
{
GST_MATROSKA_TAG_ID_TITLE, GST_TAG_TITLE}, {
GST_MATROSKA_TAG_ID_ARTIST, GST_TAG_ARTIST}, {
GST_MATROSKA_TAG_ID_ALBUM, GST_TAG_ALBUM}, {
GST_MATROSKA_TAG_ID_COMMENTS, GST_TAG_COMMENT}, {
GST_MATROSKA_TAG_ID_BITSPS, GST_TAG_BITRATE}, {
GST_MATROSKA_TAG_ID_BPS, GST_TAG_BITRATE}, {
GST_MATROSKA_TAG_ID_ENCODER, GST_TAG_ENCODER}, {
GST_MATROSKA_TAG_ID_DATE, GST_TAG_DATE}, {
GST_MATROSKA_TAG_ID_ISRC, GST_TAG_ISRC}, {
GST_MATROSKA_TAG_ID_COPYRIGHT, GST_TAG_COPYRIGHT}, {
GST_MATROSKA_TAG_ID_BPM, GST_TAG_BEATS_PER_MINUTE}, {
GST_MATROSKA_TAG_ID_TERMS_OF_USE, GST_TAG_LICENSE}, {
GST_MATROSKA_TAG_ID_COMPOSER, GST_TAG_COMPOSER}, {
GST_MATROSKA_TAG_ID_LEAD_PERFORMER, GST_TAG_PERFORMER}, {
GST_MATROSKA_TAG_ID_GENRE, GST_TAG_GENRE}
};
GstEbmlWrite *ebml = (GstEbmlWrite *) data;
guint i;
guint64 simpletag_master;
for (i = 0; i < G_N_ELEMENTS (tag_conv); i++) {
const gchar *tagname_gst = tag_conv[i].gstreamer_tagname;
const gchar *tagname_mkv = tag_conv[i].matroska_tagname;
for (i = 0; i < G_N_ELEMENTS (gst_matroska_tag_conv); i++) {
const gchar *tagname_gst = gst_matroska_tag_conv[i].gstreamer_tagname;
const gchar *tagname_mkv = gst_matroska_tag_conv[i].matroska_tagname;
if (strcmp (tagname_gst, tag) == 0) {
GValue src = { 0, };
@ -3024,7 +3058,8 @@ gst_matroska_mux_write_stream_tags (GstMatroskaMux * mux, GstMatroskaPad * mpad)
ebml = mux->ebml_write;
if (G_UNLIKELY (mpad->tags == NULL || gst_tag_list_is_empty (mpad->tags)))
if (G_UNLIKELY (mpad->tags == NULL
|| gst_matroska_mux_tag_list_is_empty (mpad->tags)))
return;
master_tag = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_TAG);
@ -3060,7 +3095,7 @@ gst_matroska_mux_streams_have_tags (GstMatroskaMux * mux)
GstMatroskaPad *collect_pad;
collect_pad = (GstMatroskaPad *) walk->data;
if (!gst_tag_list_is_empty (collect_pad->tags))
if (!gst_matroska_mux_tag_list_is_empty (collect_pad->tags))
return TRUE;
}
return FALSE;
@ -3077,7 +3112,8 @@ gst_matroska_mux_write_toc_entry_tags (GstMatroskaMux * mux,
ebml = mux->ebml_write;
if (G_UNLIKELY (entry->tags != NULL && !gst_tag_list_is_empty (entry->tags))) {
if (G_UNLIKELY (entry->tags != NULL
&& !gst_matroska_mux_tag_list_is_empty (entry->tags))) {
if (*master_tags == 0) {
mux->tags_pos = ebml->pos;
*master_tags = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_TAGS);
@ -3159,7 +3195,7 @@ gst_matroska_mux_finish (GstMatroskaMux * mux)
/* tags */
tags = gst_tag_setter_get_tag_list (GST_TAG_SETTER (mux));
has_main_tags = tags != NULL && !gst_tag_list_is_empty (tags);
has_main_tags = tags != NULL && !gst_matroska_mux_tag_list_is_empty (tags);
if (has_main_tags || gst_matroska_mux_streams_have_tags (mux)
|| gst_toc_setter_get_toc (GST_TOC_SETTER (mux)) != NULL) {