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Write meta-seek information (seek heads).

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Original commit message from CVS:
Write meta-seek information (seek heads).
This commit is contained in:
Arwed v. Merkatz 2004-09-09 17:54:26 +00:00
parent 56a8d7c680
commit 814b3d25be
3 changed files with 73 additions and 2 deletions
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4
ChangeLog
View file

@ -1,8 +1,10 @@
2004-09-09 Arwed v. Merkatz <v.merkatz@gmx.net>
* gst/matroska/matroska-mux.h:
* gst/matroska/matroska-mux.c: (gst_matroska_mux_reset),
(gst_matroska_mux_finish), (gst_matroska_mux_write_data):
(gst_matroska_mux_start), (gst_matroska_mux_finish),
(gst_matroska_mux_write_data):
Write multiple blocks/frames per cluster.
Write meta-seek information (seek heads).
2004-09-09 Scott Wheeler <wheeler@kde.org>

59
gst/matroska/matroska-mux.c
View file

@ -328,6 +328,11 @@ gst_matroska_mux_reset (GstElement * element)
mux->cluster = 0;
mux->cluster_time = 0;
mux->cluster_pos = 0;
/* reset meta-seek index */
mux->num_meta_indexes = 0;
g_free (mux->meta_index);
mux->meta_index = NULL;
}
static GstPadLinkReturn
@ -734,6 +739,7 @@ gst_matroska_mux_start (GstMatroskaMux * mux)
guint32 seekhead_id[] = { GST_MATROSKA_ID_INFO,
GST_MATROSKA_ID_TRACKS,
GST_MATROSKA_ID_CUES,
GST_MATROSKA_ID_SEEKHEAD,
#if 0
GST_MATROSKA_ID_TAGS,
#endif
@ -870,6 +876,28 @@ gst_matroska_mux_finish (GstMatroskaMux * mux)
gst_ebml_write_flush_cache (ebml);
}
if (mux->meta_index != NULL) {
guint n;
guint64 master, seekentry_master;
mux->meta_pos = ebml->pos;
gst_ebml_write_set_cache (ebml, 12 + 28 * mux->num_meta_indexes);
master = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_SEEKHEAD);
for (n = 0; n < mux->num_meta_indexes; n++) {
GstMatroskaMetaSeekIndex *idx = &mux->meta_index[n];
seekentry_master = gst_ebml_write_master_start (ebml,
GST_MATROSKA_ID_SEEKENTRY);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_SEEKID, idx->id);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_SEEKPOSITION,
idx->pos - mux->segment_master);
gst_ebml_write_master_finish (ebml, seekentry_master);
}
gst_ebml_write_master_finish (ebml, master);
}
gst_ebml_write_flush_cache (ebml);
/* FIXME: tags */
/* update seekhead. We know that:
@ -897,6 +925,17 @@ gst_matroska_mux_finish (GstMatroskaMux * mux)
gst_ebml_write_buffer_header (ebml, GST_EBML_ID_VOID, 26);
gst_ebml_write_seek (ebml, my_pos);
}
if (mux->meta_index != NULL) {
gst_ebml_replace_uint (ebml, mux->seekhead_pos + 116,
mux->meta_pos - mux->segment_master);
} else {
/* void'ify */
guint64 my_pos = ebml->pos;
gst_ebml_write_seek (ebml, mux->seekhead_pos + 96);
gst_ebml_write_buffer_header (ebml, GST_EBML_ID_VOID, 26);
gst_ebml_write_seek (ebml, my_pos);
}
#if 0
gst_ebml_replace_uint (ebml, mux->seekhead_pos + 116,
mux->tags_pos - mux->segment_master);
@ -977,6 +1016,8 @@ gst_matroska_mux_write_data (GstMatroskaMux * mux)
if (mux->cluster) {
/* start a new cluster every two seconds */
if (mux->cluster_time + GST_SECOND * 2 < GST_BUFFER_TIMESTAMP (buf)) {
GstMatroskaMetaSeekIndex *idx;
gst_ebml_write_master_finish (ebml, mux->cluster);
mux->cluster_pos = ebml->pos;
mux->cluster =
@ -984,14 +1025,32 @@ gst_matroska_mux_write_data (GstMatroskaMux * mux)
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_CLUSTERTIMECODE,
GST_BUFFER_TIMESTAMP (buf) / mux->time_scale);
mux->cluster_time = GST_BUFFER_TIMESTAMP (buf);
if (mux->num_meta_indexes % 32 == 0) {
mux->meta_index = g_renew (GstMatroskaMetaSeekIndex, mux->meta_index,
mux->num_meta_indexes + 32);
}
idx = &mux->meta_index[mux->num_meta_indexes++];
idx->id = GST_MATROSKA_ID_CLUSTER;
idx->pos = mux->cluster_pos;
}
} else {
/* first cluster */
GstMatroskaMetaSeekIndex *idx;
mux->cluster_pos = ebml->pos;
mux->cluster = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_CLUSTER);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_CLUSTERTIMECODE,
GST_BUFFER_TIMESTAMP (buf) / mux->time_scale);
mux->cluster_time = GST_BUFFER_TIMESTAMP (buf);
if (mux->num_meta_indexes % 32 == 0) {
mux->meta_index = g_renew (GstMatroskaMetaSeekIndex, mux->meta_index,
mux->num_meta_indexes + 32);
}
idx = &mux->meta_index[mux->num_meta_indexes++];
idx->id = GST_MATROSKA_ID_CLUSTER;
idx->pos = mux->cluster_pos;
}
cluster = mux->cluster;

12
gst/matroska/matroska-mux.h
View file

@ -62,6 +62,11 @@ typedef enum {
GST_MATROSKA_MUX_STATE_DATA,
} GstMatroskaMuxState;
typedef struct _GstMatroskaMetaSeekIndex {
guint32 id;
guint64 pos;
} GstMatroskaMetaSeekIndex;
typedef struct _GstMatroskaMux {
GstEbmlWrite parent;
@ -101,13 +106,18 @@ typedef struct _GstMatroskaMux {
#endif
info_pos,
tracks_pos,
duration_pos;
duration_pos,
meta_pos;
guint64 segment_master;
/* current cluster */
guint64 cluster,
cluster_time,
cluster_pos;
/* meta-seek info */
GstMatroskaMetaSeekIndex *meta_index;
guint num_meta_indexes;
} GstMatroskaMux;
typedef struct _GstMatroskaMuxClass {