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matroskamux: make index size configurable.
Added the 'min-index-interval' property to matroskamux, which determines how much time (nanoseconds) is left between keyframes stored in the index. Fixes #583985.
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1f6b06ce66
commit
ca41ddda75
2 changed files with 43 additions and 28 deletions
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@ -61,11 +61,13 @@ enum
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{
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ARG_0,
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ARG_WRITING_APP,
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ARG_MATROSKA_VERSION
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ARG_MATROSKA_VERSION,
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ARG_MIN_INDEX_INTERVAL
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};
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#define DEFAULT_MATROSKA_VERSION 1
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#define DEFAULT_WRITING_APP "GStreamer Matroska muxer"
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#define DEFAULT_MIN_INDEX_INTERVAL 0
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static GstStaticPadTemplate src_templ = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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@ -293,6 +295,10 @@ gst_matroska_mux_class_init (GstMatroskaMuxClass * klass)
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g_param_spec_int ("version", "Matroska version",
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"This parameter determines what matroska features can be used.",
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1, 2, DEFAULT_MATROSKA_VERSION, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, ARG_MIN_INDEX_INTERVAL,
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g_param_spec_int64 ("min-index-interval", "Minimum time between index "
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"entries", "An index entry is created every so many nanoseconds.",
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0, G_MAXINT64, DEFAULT_MIN_INDEX_INTERVAL, G_PARAM_READWRITE));
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_matroska_mux_change_state);
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@ -327,6 +333,7 @@ gst_matroska_mux_init (GstMatroskaMux * mux, GstMatroskaMuxClass * g_class)
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/* property defaults */
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mux->matroska_version = DEFAULT_MATROSKA_VERSION;
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mux->writing_app = g_strdup (DEFAULT_WRITING_APP);
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mux->min_index_interval = DEFAULT_MIN_INDEX_INTERVAL;
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/* initialize internal variables */
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mux->index = NULL;
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@ -2514,40 +2521,41 @@ gst_matroska_mux_write_data (GstMatroskaMux * mux, GstMatroskaPad * collect_pad)
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if (GST_BUFFER_DURATION_IS_VALID (buf))
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collect_pad->duration += GST_BUFFER_DURATION (buf);
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/* We currently write an index entry for each keyframe in a
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* video track or one entry for each cluster in an audio track
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* for audio only files. This can be largely improved, such as doing
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* one for each keyframe or each second (for all-keyframe
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* streams), only the *first* video track. But that'll come later... */
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/* We currently write index entries for all video tracks or for the audio
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* track in a single-track audio file. This could be improved by keeping the
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* index only for the *first* video track. */
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/* TODO: index is useful for every track, should contain the number of
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* the block in the cluster which contains the timestamp
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* the block in the cluster which contains the timestamp, should also work
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* for files with multiple audio tracks.
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*/
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if (is_video_keyframe) {
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GstMatroskaIndex *idx;
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if (is_video_keyframe ||
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((collect_pad->track->type == GST_MATROSKA_TRACK_TYPE_AUDIO) &&
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(mux->num_streams == 1))) {
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gint last_idx = -1;
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if (mux->num_indexes % 32 == 0) {
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mux->index = g_renew (GstMatroskaIndex, mux->index,
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mux->num_indexes + 32);
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if (mux->min_index_interval != 0) {
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for (last_idx = mux->num_indexes - 1; last_idx >= 0; last_idx--) {
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if (mux->index[last_idx].track == collect_pad->track->num)
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break;
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}
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}
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idx = &mux->index[mux->num_indexes++];
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idx->pos = mux->cluster_pos;
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idx->time = GST_BUFFER_TIMESTAMP (buf);
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idx->track = collect_pad->track->num;
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} else if ((collect_pad->track->type == GST_MATROSKA_TRACK_TYPE_AUDIO) &&
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(mux->num_streams == 1)) {
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GstMatroskaIndex *idx;
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if (last_idx < 0 || mux->min_index_interval == 0 ||
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(GST_CLOCK_DIFF (mux->index[last_idx].time, GST_BUFFER_TIMESTAMP (buf))
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>= mux->min_index_interval)) {
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GstMatroskaIndex *idx;
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if (mux->num_indexes % 32 == 0) {
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mux->index = g_renew (GstMatroskaIndex, mux->index,
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mux->num_indexes + 32);
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if (mux->num_indexes % 32 == 0) {
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mux->index = g_renew (GstMatroskaIndex, mux->index,
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mux->num_indexes + 32);
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}
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idx = &mux->index[mux->num_indexes++];
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idx->pos = mux->cluster_pos;
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idx->time = GST_BUFFER_TIMESTAMP (buf);
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idx->track = collect_pad->track->num;
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}
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idx = &mux->index[mux->num_indexes++];
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idx->pos = mux->cluster_pos;
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idx->time = GST_BUFFER_TIMESTAMP (buf);
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idx->track = collect_pad->track->num;
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}
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/* Check if the duration differs from the default duration. */
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@ -2746,6 +2754,9 @@ gst_matroska_mux_set_property (GObject * object,
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case ARG_MATROSKA_VERSION:
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mux->matroska_version = g_value_get_int (value);
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break;
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case ARG_MIN_INDEX_INTERVAL:
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mux->min_index_interval = g_value_get_int64 (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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@ -2768,6 +2779,9 @@ gst_matroska_mux_get_property (GObject * object,
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case ARG_MATROSKA_VERSION:
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g_value_set_int (value, mux->matroska_version);
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break;
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case ARG_MIN_INDEX_INTERVAL:
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g_value_set_int64 (value, mux->min_index_interval);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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@ -110,6 +110,7 @@ typedef struct _GstMatroskaMux {
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/* a cue (index) table */
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GstMatroskaIndex *index;
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guint num_indexes;
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GstClockTimeDiff min_index_interval;
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/* timescale in the file */
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guint64 time_scale;
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