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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-07-10 08:35:58 +00:00
qtdemux: refactor buffer processing and sending
... so it can be used in both pull and push based mode.
This commit is contained in:
Mark Nauwelaerts
parent
674b0c4289
commit
5ed2c3e562
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@ -399,8 +399,6 @@ gst_qtdemux_init (GstQTDemux * qtdemux)
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gst_element_add_pad (GST_ELEMENT_CAST (qtdemux), qtdemux->sinkpad);
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qtdemux->state = QTDEMUX_STATE_INITIAL;
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/* FIXME, use segment last_stop for this */
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qtdemux->last_ts = GST_CLOCK_TIME_NONE;
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qtdemux->pullbased = FALSE;
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qtdemux->neededbytes = 16;
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qtdemux->todrop = 0;
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@ -1396,7 +1394,6 @@ gst_qtdemux_change_state (GstElement * element, GstStateChange transition)
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gint n;
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qtdemux->state = QTDEMUX_STATE_INITIAL;
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qtdemux->last_ts = GST_CLOCK_TIME_NONE;
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qtdemux->neededbytes = 16;
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qtdemux->todrop = 0;
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qtdemux->pullbased = FALSE;
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@ -1938,22 +1935,6 @@ gst_qtdemux_prepare_current_sample (GstQTDemux * qtdemux,
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GST_LOG_OBJECT (qtdemux, "segment active, index = %u of %u",
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stream->sample_index, stream->n_samples);
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/* send out pending buffers */
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while (stream->buffers) {
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GstBuffer *buffer = (GstBuffer *) stream->buffers->data;
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if (G_UNLIKELY (stream->discont)) {
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GST_LOG_OBJECT (qtdemux, "marking discont buffer");
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GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
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stream->discont = FALSE;
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}
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gst_buffer_set_caps (buffer, stream->caps);
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gst_pad_push (stream->pad, buffer);
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stream->buffers = g_slist_delete_link (stream->buffers, stream->buffers);
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}
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if (G_UNLIKELY (stream->sample_index >= stream->n_samples))
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goto eos;
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@ -1966,12 +1947,6 @@ gst_qtdemux_prepare_current_sample (GstQTDemux * qtdemux,
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*duration = sample->duration;
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*keyframe = stream->all_keyframe || sample->keyframe;
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/* add padding */
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if (stream->padding) {
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*offset += stream->padding;
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*size -= stream->padding;
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}
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return TRUE;
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/* special cases */
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@ -2304,6 +2279,105 @@ gst_qtdemux_process_buffer (GstQTDemux * qtdemux, QtDemuxStream * stream,
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return buf;
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}
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/* Sets a buffer's attributes properly and pushes it downstream.
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* Also checks for additional actions and custom processing that may
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* need to be done first.
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*/
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static gboolean
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gst_qtdemux_decorate_and_push_buffer (GstQTDemux * qtdemux,
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QtDemuxStream * stream, GstBuffer * buf,
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guint64 timestamp, guint64 duration, gboolean keyframe, guint64 position)
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{
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GstFlowReturn ret = GST_FLOW_OK;
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if (G_UNLIKELY (stream->fourcc == FOURCC_rtsp)) {
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GstMessage *m;
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gchar *url;
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url = g_strndup ((gchar *) GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
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/* we have RTSP redirect now */
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m = gst_message_new_element (GST_OBJECT_CAST (qtdemux),
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gst_structure_new ("redirect",
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"new-location", G_TYPE_STRING, url, NULL));
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g_free (url);
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gst_element_post_message (GST_ELEMENT_CAST (qtdemux), m);
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}
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/* position reporting */
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if (qtdemux->segment.rate >= 0) {
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gst_segment_set_last_stop (&qtdemux->segment, GST_FORMAT_TIME, position);
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gst_qtdemux_sync_streams (qtdemux);
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}
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if (G_UNLIKELY (!stream->pad)) {
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GST_DEBUG_OBJECT (qtdemux, "No output pad for stream, ignoring");
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gst_buffer_unref (buf);
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goto exit;
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}
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/* send out pending buffers */
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while (stream->buffers) {
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GstBuffer *buffer = (GstBuffer *) stream->buffers->data;
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if (G_UNLIKELY (stream->discont)) {
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GST_LOG_OBJECT (qtdemux, "marking discont buffer");
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GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
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stream->discont = FALSE;
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}
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gst_buffer_set_caps (buffer, stream->caps);
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gst_pad_push (stream->pad, buffer);
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stream->buffers = g_slist_delete_link (stream->buffers, stream->buffers);
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}
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/* we're going to modify the metadata */
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buf = gst_buffer_make_metadata_writable (buf);
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if (G_UNLIKELY (stream->need_process))
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buf = gst_qtdemux_process_buffer (qtdemux, stream, buf);
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GST_BUFFER_TIMESTAMP (buf) = timestamp;
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GST_BUFFER_DURATION (buf) = duration;
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GST_BUFFER_OFFSET (buf) = -1;
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GST_BUFFER_OFFSET_END (buf) = -1;
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if (G_UNLIKELY (stream->padding)) {
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GST_BUFFER_DATA (buf) += stream->padding;
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GST_BUFFER_SIZE (buf) -= stream->padding;
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}
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if (stream->need_clip)
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buf = gst_qtdemux_clip_buffer (qtdemux, stream, buf);
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if (G_UNLIKELY (buf == NULL))
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goto exit;
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if (G_UNLIKELY (stream->discont)) {
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GST_LOG_OBJECT (qtdemux, "marking discont buffer");
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GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
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stream->discont = FALSE;
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}
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if (!keyframe)
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GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
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gst_buffer_set_caps (buf, stream->caps);
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GST_LOG_OBJECT (qtdemux,
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"Pushing buffer with time %" GST_TIME_FORMAT ", duration %"
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GST_TIME_FORMAT " on pad %s",
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GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
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GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_PAD_NAME (stream->pad));
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ret = gst_pad_push (stream->pad, buf);
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exit:
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return ret;
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}
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static GstFlowReturn
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gst_qtdemux_loop_state_movie (GstQTDemux * qtdemux)
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{
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@ -2377,67 +2451,8 @@ gst_qtdemux_loop_state_movie (GstQTDemux * qtdemux)
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if (G_UNLIKELY (ret != GST_FLOW_OK))
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goto beach;
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if (G_UNLIKELY (stream->fourcc == FOURCC_rtsp)) {
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GstMessage *m;
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gchar *url;
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url = g_strndup ((gchar *) GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
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/* we have RTSP redirect now */
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m = gst_message_new_element (GST_OBJECT_CAST (qtdemux),
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gst_structure_new ("redirect",
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"new-location", G_TYPE_STRING, url, NULL));
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g_free (url);
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gst_element_post_message (GST_ELEMENT_CAST (qtdemux), m);
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}
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qtdemux->last_ts = min_time;
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if (qtdemux->segment.rate >= 0) {
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gst_segment_set_last_stop (&qtdemux->segment, GST_FORMAT_TIME, min_time);
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gst_qtdemux_sync_streams (qtdemux);
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}
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if (G_LIKELY (stream->pad)) {
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/* we're going to modify the metadata */
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buf = gst_buffer_make_metadata_writable (buf);
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if (G_UNLIKELY (stream->need_process))
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buf = gst_qtdemux_process_buffer (qtdemux, stream, buf);
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GST_BUFFER_TIMESTAMP (buf) = timestamp;
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GST_BUFFER_DURATION (buf) = duration;
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GST_BUFFER_OFFSET (buf) = -1;
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GST_BUFFER_OFFSET_END (buf) = -1;
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if (stream->need_clip)
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buf = gst_qtdemux_clip_buffer (qtdemux, stream, buf);
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if (buf == NULL)
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goto next;
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if (stream->discont) {
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GST_LOG_OBJECT (qtdemux, "marking discont buffer");
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GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
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stream->discont = FALSE;
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}
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if (!keyframe)
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GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
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gst_buffer_set_caps (buf, stream->caps);
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GST_LOG_OBJECT (qtdemux,
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"Pushing buffer with time %" GST_TIME_FORMAT ", duration %"
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GST_TIME_FORMAT " on pad %s",
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GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
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GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_PAD_NAME (stream->pad));
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ret = gst_pad_push (stream->pad, buf);
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} else {
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GST_DEBUG_OBJECT (qtdemux, "No output pad for stream, ignoring");
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gst_buffer_unref (buf);
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ret = GST_FLOW_OK;
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}
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ret = gst_qtdemux_decorate_and_push_buffer (qtdemux, stream, buf,
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timestamp, duration, keyframe, min_time);
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/* combine flows */
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ret = gst_qtdemux_combine_flows (qtdemux, stream, ret);
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@ -2676,6 +2691,13 @@ gst_qtdemux_chain (GstPad * sinkpad, GstBuffer * inbuf)
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guint32 fourcc;
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guint64 size;
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/* prepare newsegment to send when streaming actually starts */
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if (!demux->pending_newsegment) {
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demux->pending_newsegment =
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gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME,
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0, GST_CLOCK_TIME_NONE, 0);
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}
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data = gst_adapter_peek (demux->adapter, demux->neededbytes);
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/* get fourcc/length, set neededbytes */
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@ -2809,6 +2831,8 @@ gst_qtdemux_chain (GstPad * sinkpad, GstBuffer * inbuf)
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GstBuffer *outbuf;
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QtDemuxStream *stream = NULL;
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int i = -1;
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guint64 timestamp, duration, position;
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gboolean keyframe;
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GST_DEBUG_OBJECT (demux,
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"BEGIN // in MOVIE for offset %" G_GUINT64_FORMAT, demux->offset);
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@ -2823,10 +2847,9 @@ gst_qtdemux_chain (GstPad * sinkpad, GstBuffer * inbuf)
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/* first buffer? */
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/* initial newsegment sent here after having added pads,
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* possible others in sink_event */
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if (G_UNLIKELY (demux->last_ts == GST_CLOCK_TIME_NONE)) {
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gst_qtdemux_push_event (demux,
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gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME,
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0, GST_CLOCK_TIME_NONE, 0));
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if (G_UNLIKELY (demux->pending_newsegment)) {
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gst_qtdemux_push_event (demux, demux->pending_newsegment);
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demux->pending_newsegment = NULL;
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/* clear to send tags on all streams */
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for (i = 0; i < demux->n_streams; i++) {
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gst_qtdemux_push_tags (demux, demux->streams[i]);
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@ -2858,37 +2881,14 @@ gst_qtdemux_chain (GstPad * sinkpad, GstBuffer * inbuf)
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g_return_val_if_fail (outbuf != NULL, GST_FLOW_ERROR);
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if (stream->samples[stream->sample_index].pts_offset) {
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demux->last_ts = stream->samples[stream->sample_index].timestamp;
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GST_BUFFER_TIMESTAMP (outbuf) = demux->last_ts +
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stream->samples[stream->sample_index].pts_offset;
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} else {
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GST_BUFFER_TIMESTAMP (outbuf) =
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stream->samples[stream->sample_index].timestamp;
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demux->last_ts = GST_BUFFER_TIMESTAMP (outbuf);
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}
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GST_BUFFER_DURATION (outbuf) =
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stream->samples[stream->sample_index].duration;
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if (!stream->all_keyframe &&
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!stream->samples[stream->sample_index].keyframe)
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GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
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position = stream->samples[stream->sample_index].timestamp;
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timestamp = position + stream->samples[stream->sample_index].pts_offset;
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duration = stream->samples[stream->sample_index].duration;
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keyframe = stream->all_keyframe ||
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stream->samples[stream->sample_index].keyframe;
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/* position reporting */
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gst_segment_set_last_stop (&demux->segment, GST_FORMAT_TIME,
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demux->last_ts);
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gst_qtdemux_sync_streams (demux);
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/* send buffer */
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if (stream->pad) {
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GST_LOG_OBJECT (demux,
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"Pushing buffer with time %" GST_TIME_FORMAT " on pad %p",
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GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)), stream->pad);
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gst_buffer_set_caps (outbuf, stream->caps);
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ret = gst_pad_push (stream->pad, outbuf);
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} else {
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gst_buffer_unref (outbuf);
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ret = GST_FLOW_OK;
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}
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ret = gst_qtdemux_decorate_and_push_buffer (demux, stream, outbuf,
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timestamp, duration, keyframe, position);
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/* combine flows */
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ret = gst_qtdemux_combine_flows (demux, stream, ret);
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@ -89,9 +89,6 @@ struct _GstQTDemux {
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GstTagList *tag_list;
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/* track stuff */
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guint64 last_ts;
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/* configured playback region */
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GstSegment segment;
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gboolean segment_running;
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