diff options
Diffstat (limited to 'gst/mxf/mxfdemux.c')
-rw-r--r-- | gst/mxf/mxfdemux.c | 259 |
1 files changed, 242 insertions, 17 deletions
diff --git a/gst/mxf/mxfdemux.c b/gst/mxf/mxfdemux.c index 11e8c093..08bdfce0 100644 --- a/gst/mxf/mxfdemux.c +++ b/gst/mxf/mxfdemux.c @@ -262,10 +262,7 @@ gst_mxf_demux_reset (GstMXFDemux * demux) memset (&demux->current_package_uid, 0, sizeof (MXFUMID)); - if (demux->new_seg_event) { - gst_event_unref (demux->new_seg_event); - demux->new_seg_event = NULL; - } + gst_segment_init (&demux->segment, GST_FORMAT_TIME); if (demux->close_seg_event) { gst_event_unref (demux->close_seg_event); @@ -1286,14 +1283,15 @@ gst_mxf_demux_handle_generic_container_system_item (GstMXFDemux * demux, } static GstFlowReturn -gst_mxf_demux_pad_next_component (GstMXFDemux * demux, GstMXFDemuxPad * pad) +gst_mxf_demux_pad_set_component (GstMXFDemux * demux, GstMXFDemuxPad * pad, + guint i) { MXFMetadataSequence *sequence; guint k; MXFMetadataSourcePackage *source_package = NULL; MXFMetadataTimelineTrack *source_track = NULL; - pad->current_component_index++; + pad->current_component_index = i; sequence = pad->material_track->parent.sequence; @@ -1592,8 +1590,12 @@ gst_mxf_demux_handle_generic_container_essence_element (GstMXFDemux * demux, } if (pad->need_segment) { + if (demux->close_seg_event) + gst_pad_push_event (GST_PAD_CAST (pad), + gst_event_ref (demux->close_seg_event)); gst_pad_push_event (GST_PAD_CAST (pad), - gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME, 0, -1, + gst_event_new_new_segment (FALSE, demux->segment.rate, + GST_FORMAT_TIME, demux->segment.start, demux->segment.stop, GST_BUFFER_TIMESTAMP (outbuf))); pad->need_segment = FALSE; } @@ -1637,7 +1639,9 @@ gst_mxf_demux_handle_generic_container_essence_element (GstMXFDemux * demux, >= pad->current_component->parent.duration) { GST_DEBUG_OBJECT (demux, "Switching to next component"); - ret = gst_mxf_demux_pad_next_component (demux, pad); + ret = + gst_mxf_demux_pad_set_component (demux, pad, + pad->current_component_index + 1); if (ret != GST_FLOW_OK && ret != GST_FLOW_UNEXPECTED) { GST_ERROR_OBJECT (demux, "Switching component failed"); } @@ -2733,6 +2737,230 @@ gst_mxf_demux_chain (GstPad * pad, GstBuffer * inbuf) return ret; } +static void +gst_mxf_demux_pad_set_position (GstMXFDemux * demux, GstMXFDemuxPad * p, + GstClockTime start) +{ + guint i; + GstClockTime sum = 0; + MXFMetadataSourceClip *clip = NULL; + + if (!MXF_IS_METADATA_MATERIAL_PACKAGE (demux->current_package)) { + p->current_essence_track_position = + gst_util_uint64_scale (start, p->material_track->edit_rate.n, + p->material_track->edit_rate.d * GST_SECOND); + + if (p->current_essence_track_position >= p->current_essence_track->duration + && p->current_essence_track->duration > 0) { + p->eos = TRUE; + p->last_stop = + gst_util_uint64_scale (p->current_essence_track->duration, + p->material_track->edit_rate.d * GST_SECOND, + p->material_track->edit_rate.n); + } else { + p->last_stop = start; + } + p->last_stop_accumulated_error = 0.0; + + return; + } + + for (i = 0; i < p->material_track->parent.sequence->n_structural_components; + i++) { + clip = + MXF_METADATA_SOURCE_CLIP (p->material_track->parent. + sequence->structural_components[i]); + + sum += + gst_util_uint64_scale (clip->parent.duration, + p->material_track->edit_rate.d * GST_SECOND, + p->material_track->edit_rate.n); + if (sum > start) + break; + } + + if (i == p->material_track->parent.sequence->n_structural_components) { + p->eos = TRUE; + p->last_stop = sum; + p->last_stop_accumulated_error = 0.0; + return; + } + + sum -= + gst_util_uint64_scale (clip->parent.duration, + p->material_track->edit_rate.d * GST_SECOND, + p->material_track->edit_rate.n); + + p->last_stop = start; + p->last_stop_accumulated_error = 0.0; + start -= sum; + + if (gst_mxf_demux_pad_set_component (demux, p, i) != GST_FLOW_OK) { + p->eos = TRUE; + } + + p->current_essence_track_position = + gst_util_uint64_scale (start, p->material_track->edit_rate.n, + p->material_track->edit_rate.d * GST_SECOND); +} + +static gboolean +gst_mxf_demux_seek_pull (GstMXFDemux * demux, GstEvent * event) +{ + GstFormat format; + GstSeekFlags flags; + GstSeekType start_type, stop_type; + gint64 start, stop; + gdouble rate; + gboolean update, flush, keyframe; + GstSegment seeksegment; + guint i; + + gst_event_parse_seek (event, &rate, &format, &flags, + &start_type, &start, &stop_type, &stop); + + if (format != GST_FORMAT_TIME) + goto wrong_format; + + if (rate <= 0.0) + goto wrong_rate; + + flush = !!(flags & GST_SEEK_FLAG_FLUSH); + keyframe = !!(flags & GST_SEEK_FLAG_KEY_UNIT); + + if (flush) { + /* Flush start up and downstream to make sure data flow and loops are + idle */ + gst_mxf_demux_push_src_event (demux, gst_event_new_flush_start ()); + gst_pad_push_event (demux->sinkpad, gst_event_new_flush_start ()); + } else { + /* Pause the pulling task */ + gst_pad_pause_task (demux->sinkpad); + } + + /* Take the stream lock */ + GST_PAD_STREAM_LOCK (demux->sinkpad); + + if (flush) { + /* Stop flushing upstream we need to pull */ + gst_pad_push_event (demux->sinkpad, gst_event_new_flush_stop ()); + } + + /* Work on a copy until we are sure the seek succeeded. */ + memcpy (&seeksegment, &demux->segment, sizeof (GstSegment)); + + GST_DEBUG_OBJECT (demux, "segment before configure %" GST_SEGMENT_FORMAT, + &demux->segment); + + /* Apply the seek to our segment */ + gst_segment_set_seek (&seeksegment, rate, format, flags, + start_type, start, stop_type, stop, &update); + + GST_DEBUG_OBJECT (demux, "segment configured %" GST_SEGMENT_FORMAT, + &seeksegment); + + if (flush || seeksegment.last_stop != demux->segment.last_stop) { + guint64 new_offset = -1; + + if (!demux->metadata_resolved) { + if (gst_mxf_demux_resolve_references (demux) != GST_FLOW_OK) + goto unresolved_metadata; + } + + /* Do the actual seeking */ + for (i = 0; i < demux->src->len; i++) { + GstMXFDemuxPad *p = g_ptr_array_index (demux->src, i); + gint64 position; + guint64 off; + + /* Reset EOS flag on all pads */ + p->eos = FALSE; + p->last_flow = GST_FLOW_OK; + gst_mxf_demux_pad_set_position (demux, p, start); + + position = p->current_essence_track_position; + off = + gst_mxf_demux_find_essence_element (demux, p->current_essence_track, + &position, keyframe); + if (off == -1) { + GST_DEBUG_OBJECT (demux, "Unable to find offset for pad %s", + GST_PAD_NAME (p)); + p->eos = TRUE; + } else { + new_offset = MIN (off, new_offset); + p->current_essence_track_position = position; + } + p->discont = TRUE; + } + demux->offset = new_offset; + } + + if (G_UNLIKELY (demux->close_seg_event)) { + gst_event_unref (demux->close_seg_event); + demux->close_seg_event = NULL; + } + + if (flush) { + /* Stop flushing, the sinks are at time 0 now */ + gst_mxf_demux_push_src_event (demux, gst_event_new_flush_stop ()); + } else { + GST_DEBUG_OBJECT (demux, "closing running segment %" GST_SEGMENT_FORMAT, + &demux->segment); + + /* Close the current segment for a linear playback */ + demux->close_seg_event = gst_event_new_new_segment (TRUE, + demux->segment.rate, demux->segment.format, + demux->segment.start, demux->segment.last_stop, demux->segment.time); + } + + /* Ok seek succeeded, take the newly configured segment */ + memcpy (&demux->segment, &seeksegment, sizeof (GstSegment)); + + /* Notify about the start of a new segment */ + if (demux->segment.flags & GST_SEEK_FLAG_SEGMENT) { + gst_element_post_message (GST_ELEMENT (demux), + gst_message_new_segment_start (GST_OBJECT (demux), + demux->segment.format, demux->segment.last_stop)); + } + + /* Tell all the stream a new segment is needed */ + for (i = 0; i < demux->src->len; i++) { + GstMXFDemuxPad *p = g_ptr_array_index (demux->src, i); + p->need_segment = TRUE; + } + + for (i = 0; i < demux->essence_tracks->len; i++) { + GstMXFDemuxEssenceTrack *t = + &g_array_index (demux->essence_tracks, GstMXFDemuxEssenceTrack, i); + t->position = -1; + } + + gst_pad_start_task (demux->sinkpad, + (GstTaskFunction) gst_mxf_demux_loop, demux->sinkpad); + + GST_PAD_STREAM_UNLOCK (demux->sinkpad); + + return TRUE; + + /* ERRORS */ +wrong_format: + { + GST_WARNING_OBJECT (demux, "seeking only supported in TIME format"); + return FALSE; + } +wrong_rate: + { + GST_WARNING_OBJECT (demux, "only rates > 0.0 are allowed"); + return FALSE; + } +unresolved_metadata: + { + GST_WARNING_OBJECT (demux, "metadata can't be resolved"); + return FALSE; + } + +} + static gboolean gst_mxf_demux_src_event (GstPad * pad, GstEvent * event) { @@ -2743,9 +2971,11 @@ gst_mxf_demux_src_event (GstPad * pad, GstEvent * event) switch (GST_EVENT_TYPE (event)) { case GST_EVENT_SEEK: - /* TODO: handle this */ + if (demux->random_access) + ret = gst_mxf_demux_seek_pull (demux, event); + else + ret = FALSE; gst_event_unref (event); - ret = FALSE; break; default: ret = gst_pad_push_event (demux->sinkpad, event); @@ -3110,16 +3340,13 @@ gst_mxf_demux_finalize (GObject * object) { GstMXFDemux *demux = GST_MXF_DEMUX (object); + gst_mxf_demux_reset (demux); + if (demux->adapter) { g_object_unref (demux->adapter); demux->adapter = NULL; } - if (demux->new_seg_event) { - gst_event_unref (demux->new_seg_event); - demux->new_seg_event = NULL; - } - if (demux->close_seg_event) { gst_event_unref (demux->close_seg_event); demux->close_seg_event = NULL; @@ -3130,8 +3357,6 @@ gst_mxf_demux_finalize (GObject * object) g_free (demux->requested_package_string); demux->requested_package_string = NULL; - gst_mxf_demux_reset (demux); - G_OBJECT_CLASS (parent_class)->finalize (object); } |