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adaptivedemux: Send the bitrate of the stream as a tag

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If we know or can measure the nominal bitrate of a stream,
send that info as a tag downstream
This commit is contained in:
Jan Schmidt 2015-11-11 03:54:51 +11:00
parent 952275ad99
commit 08544a459b
2 changed files with 56 additions and 3 deletions
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52
gst-libs/gst/adaptivedemux/gstadaptivedemux.c
View file

@ -1722,11 +1722,24 @@ gst_adaptive_demux_stream_push_buffer (GstAdaptiveDemuxStream * stream,
gst_pad_push_event (stream->pad, stream->pending_segment);
stream->pending_segment = NULL;
}
if (G_UNLIKELY (stream->pending_tags)) {
if (G_UNLIKELY (stream->pending_tags || stream->bitrate_changed)) {
GstTagList *tags = stream->pending_tags;
stream->pending_tags = NULL;
stream->bitrate_changed = 0;
if (stream->fragment.bitrate != 0) {
if (tags)
tags = gst_tag_list_make_writable (tags);
else
tags = gst_tag_list_new_empty ();
gst_tag_list_add (tags, GST_TAG_MERGE_KEEP,
GST_TAG_NOMINAL_BITRATE, stream->fragment.bitrate, NULL);
}
GST_DEBUG_OBJECT (stream->pad, "Sending pending tags: %" GST_PTR_FORMAT,
stream->pending_tags);
gst_pad_push_event (stream->pad, gst_event_new_tag (stream->pending_tags));
stream->pending_tags = NULL;
gst_pad_push_event (stream->pad, gst_event_new_tag (tags));
}
while (stream->pending_events != NULL) {
GstEvent *event = stream->pending_events->data;
@ -1842,6 +1855,34 @@ _src_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
} else {
GST_BUFFER_PTS (buffer) = GST_CLOCK_TIME_NONE;
}
if (stream->downloading_first_buffer) {
gint64 chunk_size = 0;
stream->downloading_first_buffer = FALSE;
if (!stream->downloading_header && !stream->downloading_index) {
/* If this is the first buffer of a fragment (not the headers or index)
* and we don't have a birate from the sub-class, then see if we
* can work it out from the fragment size and duration */
if (stream->fragment.bitrate == 0 &&
stream->fragment.duration != 0 &&
gst_element_query_duration (stream->uri_handler, GST_FORMAT_BYTES,
&chunk_size)) {
guint bitrate = MIN (G_MAXUINT, gst_util_uint64_scale (chunk_size,
8 * GST_SECOND, stream->fragment.duration));
GST_LOG_OBJECT (demux,
"Fragment has size %" G_GUINT64_FORMAT " duration %" GST_TIME_FORMAT
" = bitrate %u", chunk_size,
GST_TIME_ARGS (stream->fragment.duration), bitrate);
stream->fragment.bitrate = bitrate;
}
if (stream->fragment.bitrate) {
stream->bitrate_changed = TRUE;
} else {
GST_WARNING_OBJECT (demux, "Bitrate for fragment not available");
}
}
}
stream->download_total_time +=
g_get_monotonic_time () - stream->download_chunk_start_time;
@ -2276,6 +2317,7 @@ gst_adaptive_demux_stream_download_uri (GstAdaptiveDemux * demux,
*/
g_mutex_lock (&stream->fragment_download_lock);
stream->download_finished = FALSE;
stream->downloading_first_buffer = TRUE;
g_mutex_unlock (&stream->fragment_download_lock);
GST_MANIFEST_UNLOCK (demux);
@ -3096,6 +3138,10 @@ gst_adaptive_demux_stream_update_fragment_info (GstAdaptiveDemux * demux,
g_return_val_if_fail (klass->stream_update_fragment_info != NULL,
GST_FLOW_ERROR);
/* Make sure the sub-class will update bitrate, or else
* we will later */
stream->fragment.bitrate = 0;
return klass->stream_update_fragment_info (stream);
}

7
gst-libs/gst/adaptivedemux/gstadaptivedemux.h
View file

@ -105,6 +105,10 @@ struct _GstAdaptiveDemuxStreamFragment
gchar *index_uri;
gint64 index_range_start;
gint64 index_range_end;
/* Nominal bitrate as provided by
* sub-class or calculated by base-class */
guint bitrate;
};
struct _GstAdaptiveDemuxStream
@ -132,9 +136,12 @@ struct _GstAdaptiveDemuxStream
gboolean restart_download;
gboolean discont;
gboolean downloading_first_buffer;
gboolean downloading_header;
gboolean downloading_index;
gboolean bitrate_changed;
/* download tooling */
GstElement *src;
GstPad *src_srcpad;