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matroskamux: Use the running time for container timestamps, not buffer timestamps

Browse source 
Buffer timestamps have no real meaning here, and for selecting the next
buffer we already use the running time anyway.
This commit is contained in:
Sebastian Dröge 2014-01-05 10:22:37 +01:00
parent f48bb20b4f
commit b3aa8755fe
1 changed files with 45 additions and 24 deletions
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69
gst/matroska/matroska-mux.c
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@ -3229,6 +3229,7 @@ gst_matroska_mux_write_data (GstMatroskaMux * mux, GstMatroskaPad * collect_pad,
GstBuffer *hdr;
guint64 blockgroup;
gboolean write_duration;
GstClockTime timestamp;
gint16 relative_timestamp;
gint64 relative_timestamp64;
guint64 block_duration;
@ -3268,13 +3269,22 @@ gst_matroska_mux_write_data (GstMatroskaMux * mux, GstMatroskaPad * collect_pad,
return GST_FLOW_OK;
}
timestamp = gst_segment_to_running_time (&collect_pad->collect.segment,
GST_FORMAT_TIME, GST_BUFFER_TIMESTAMP (buf))
if (!GST_CLOCK_TIME_IS_VALID (timestamp)) {
GST_WARNING_OBJECT (collect_pad->collect.pad,
"Invalid buffer running time; dropping buffer");
gst_buffer_unref (buf);
return GST_FLOW_OK;
}
/* set the timestamp for outgoing buffers */
ebml->timestamp = GST_BUFFER_TIMESTAMP (buf);
ebml->timestamp = timestamp;
if (collect_pad->track->type == GST_MATROSKA_TRACK_TYPE_VIDEO) {
if (!GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
GST_LOG_OBJECT (mux, "have video keyframe, ts=%" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
GST_TIME_ARGS (timestamp));
is_video_keyframe = TRUE;
} else if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DECODE_ONLY) &&
(!strcmp (collect_pad->track->codec_id, GST_MATROSKA_CODEC_ID_VIDEO_VP8)
@ -3282,7 +3292,7 @@ gst_matroska_mux_write_data (GstMatroskaMux * mux, GstMatroskaPad * collect_pad,
GST_MATROSKA_CODEC_ID_VIDEO_VP9))) {
GST_LOG_OBJECT (mux,
"have VP8 video invisible frame, " "ts=%" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
GST_TIME_ARGS (timestamp));
is_video_invisible = TRUE;
}
}
@ -3291,7 +3301,7 @@ gst_matroska_mux_write_data (GstMatroskaMux * mux, GstMatroskaPad * collect_pad,
/* start a new cluster at every keyframe, at every GstForceKeyUnit event,
* or when we may be reaching the limit of the relative timestamp */
if (mux->cluster_time +
mux->max_cluster_duration < GST_BUFFER_TIMESTAMP (buf)
mux->max_cluster_duration < timestamp
|| is_video_keyframe || mux->force_key_unit_event) {
if (!mux->streamable)
gst_ebml_write_master_finish (ebml, mux->cluster);
@ -3308,13 +3318,11 @@ gst_matroska_mux_write_data (GstMatroskaMux * mux, GstMatroskaPad * collect_pad,
mux->cluster =
gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_CLUSTER);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_CLUSTERTIMECODE,
gst_util_uint64_scale (GST_BUFFER_TIMESTAMP (buf), 1,
mux->time_scale));
gst_util_uint64_scale (timestamp, 1, mux->time_scale));
GST_LOG_OBJECT (mux, "cluster timestamp %" G_GUINT64_FORMAT,
gst_util_uint64_scale (GST_BUFFER_TIMESTAMP (buf), 1,
mux->time_scale));
gst_ebml_write_flush_cache (ebml, TRUE, GST_BUFFER_TIMESTAMP (buf));
mux->cluster_time = GST_BUFFER_TIMESTAMP (buf);
gst_util_uint64_scale (timestamp, 1, mux->time_scale));
gst_ebml_write_flush_cache (ebml, TRUE, timestamp);
mux->cluster_time = timestamp;
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_PREVSIZE,
mux->prev_cluster_size);
}
@ -3325,14 +3333,21 @@ gst_matroska_mux_write_data (GstMatroskaMux * mux, GstMatroskaPad * collect_pad,
gst_ebml_write_set_cache (ebml, 0x20);
mux->cluster = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_CLUSTER);
gst_ebml_write_uint (ebml, GST_MATROSKA_ID_CLUSTERTIMECODE,
gst_util_uint64_scale (GST_BUFFER_TIMESTAMP (buf), 1, mux->time_scale));
gst_ebml_write_flush_cache (ebml, TRUE, GST_BUFFER_TIMESTAMP (buf));
mux->cluster_time = GST_BUFFER_TIMESTAMP (buf);
gst_util_uint64_scale (timestamp, 1, mux->time_scale));
gst_ebml_write_flush_cache (ebml, TRUE, timestamp);
mux->cluster_time = timestamp;
}
/* update duration of this track */
if (GST_BUFFER_DURATION_IS_VALID (buf))
collect_pad->duration += GST_BUFFER_DURATION (buf);
if (GST_BUFFER_DURATION_IS_VALID (buf)) {
GstClockTime end_time;
end_time = gst_segment_to_running_time (&collect_pad->collect.segment,
GST_FORMAT_TIME,
GST_BUFFER_TIMESTAMP (buf) + GST_BUFFER_DURATION (buf));
if (GST_CLOCK_TIME_IS_VALID (end_time))
collect_pad->duration += end_time - timestamp;
}
/* We currently write index entries for all video tracks or for the audio
* track in a single-track audio file. This could be improved by keeping the
@ -3356,7 +3371,7 @@ gst_matroska_mux_write_data (GstMatroskaMux * mux, GstMatroskaPad * collect_pad,
}
if (last_idx < 0 || mux->min_index_interval == 0 ||
(GST_CLOCK_DIFF (mux->index[last_idx].time, GST_BUFFER_TIMESTAMP (buf))
(GST_CLOCK_DIFF (mux->index[last_idx].time, timestamp)
>= mux->min_index_interval)) {
GstMatroskaIndex *idx;
@ -3367,7 +3382,7 @@ gst_matroska_mux_write_data (GstMatroskaMux * mux, GstMatroskaPad * collect_pad,
idx = &mux->index[mux->num_indexes++];
idx->pos = mux->cluster_pos;
idx->time = GST_BUFFER_TIMESTAMP (buf);
idx->time = timestamp;
idx->track = collect_pad->track->num;
}
}
@ -3389,7 +3404,7 @@ gst_matroska_mux_write_data (GstMatroskaMux * mux, GstMatroskaPad * collect_pad,
/* write the block, for doctype v2 use SimpleBlock if possible
* one slice (*breath*).
* FIXME: Need to do correct lacing! */
relative_timestamp64 = GST_BUFFER_TIMESTAMP (buf) - mux->cluster_time;
relative_timestamp64 = timestamp - mux->cluster_time;
if (relative_timestamp64 >= 0) {
/* round the timestamp */
relative_timestamp64 += gst_util_uint64_scale (mux->time_scale, 1, 2);
@ -3417,7 +3432,7 @@ gst_matroska_mux_write_data (GstMatroskaMux * mux, GstMatroskaPad * collect_pad,
gst_ebml_write_buffer_header (ebml, GST_MATROSKA_ID_SIMPLEBLOCK,
gst_buffer_get_size (buf) + gst_buffer_get_size (hdr));
gst_ebml_write_buffer (ebml, hdr);
gst_ebml_write_flush_cache (ebml, FALSE, GST_BUFFER_TIMESTAMP (buf));
gst_ebml_write_flush_cache (ebml, FALSE, timestamp);
gst_ebml_write_buffer (ebml, buf);
return gst_ebml_last_write_result (ebml);
@ -3436,7 +3451,7 @@ gst_matroska_mux_write_data (GstMatroskaMux * mux, GstMatroskaPad * collect_pad,
gst_ebml_write_buffer (ebml, hdr);
gst_ebml_write_master_finish_full (ebml, blockgroup,
gst_buffer_get_size (buf));
gst_ebml_write_flush_cache (ebml, FALSE, GST_BUFFER_TIMESTAMP (buf));
gst_ebml_write_flush_cache (ebml, FALSE, timestamp);
gst_ebml_write_buffer (ebml, buf);
return gst_ebml_last_write_result (ebml);
@ -3504,13 +3519,19 @@ gst_matroska_mux_handle_buffer (GstCollectPads * pads, GstCollectData * data,
/* make note of first and last encountered timestamps, so we can calculate
* the actual duration later when we send an updated header on eos */
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
GstClockTime start_ts = GST_BUFFER_TIMESTAMP (buf);
GstClockTime end_ts = start_ts;
GstClockTime start_ts =
gst_segment_to_running_time (&best->collect.segment, GST_FORMAT_TIME,
GST_BUFFER_TIMESTAMP (buf));
GstClockTime end_ts;
if (GST_BUFFER_DURATION_IS_VALID (buf))
end_ts += GST_BUFFER_DURATION (buf);
end_ts =
gst_segment_to_running_time (&best->collect.segment, GST_FORMAT_TIME,
GST_BUFFER_TIMESTAMP (buf) + GST_BUFFER_DURATION (buf));
else if (best->track->default_duration)
end_ts += best->track->default_duration;
end_ts = start_ts + best->track->default_duration;
else
end_ts = start_ts;
if (!GST_CLOCK_TIME_IS_VALID (best->end_ts) || end_ts > best->end_ts)
best->end_ts = end_ts;