--- /dev/null
+/* GStreamer
+ * Copyright (C) 2008 David Schleef <ds@schleef.org>
+ * Copyright (C) 2011 Mark Nauwelaerts <mark.nauwelaerts@collabora.co.uk>.
+ * Copyright (C) 2011 Nokia Corporation. All rights reserved.
+ * Contact: Stefan Kost <stefan.kost@nokia.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * SECTION:gstbasevideodecoder
+ * @short_description: Base class for video decoders
+ * @see_also: #GstBaseTransform
+ *
+ * This base class is for video decoders turning encoded data into raw video
+ * frames.
+ *
+ * GstBaseVideoDecoder and subclass should cooperate as follows.
+ * <orderedlist>
+ * <listitem>
+ * <itemizedlist><title>Configuration</title>
+ * <listitem><para>
+ * Initially, GstBaseVideoDecoder calls @start when the decoder element
+ * is activated, which allows subclass to perform any global setup.
+ * </para></listitem>
+ * <listitem><para>
+ * GstBaseVideoDecoder calls @set_format to inform subclass of caps
+ * describing input video data that it is about to receive, including
+ * possibly configuration data.
+ * While unlikely, it might be called more than once, if changing input
+ * parameters require reconfiguration.
+ * </para></listitem>
+ * <listitem><para>
+ * GstBaseVideoDecoder calls @stop at end of all processing.
+ * </para></listitem>
+ * </itemizedlist>
+ * </listitem>
+ * <listitem>
+ * <itemizedlist>
+ * <title>Data processing</title>
+ * <listitem><para>
+ * Base class gathers input data, and optionally allows subclass
+ * to parse this into subsequently manageable chunks, typically
+ * corresponding to and referred to as 'frames'.
+ * </para></listitem>
+ * <listitem><para>
+ * Input frame is provided to subclass' @handle_frame.
+ * </para></listitem>
+ * <listitem><para>
+ * If codec processing results in decoded data, subclass should call
+ * @gst_base_video_decoder_finish_frame to have decoded data pushed
+ * downstream.
+ * </para></listitem>
+ * </itemizedlist>
+ * </listitem>
+ * <listitem>
+ * <itemizedlist><title>Shutdown phase</title>
+ * <listitem><para>
+ * GstBaseVideoDecoder class calls @stop to inform the subclass that data
+ * parsing will be stopped.
+ * </para></listitem>
+ * </itemizedlist>
+ * </listitem>
+ * </orderedlist>
+ *
+ * Subclass is responsible for providing pad template caps for
+ * source and sink pads. The pads need to be named "sink" and "src". It also
+ * needs to set the fixed caps on srcpad, when the format is ensured. This
+ * is typically when base class calls subclass' @set_format function, though
+ * it might be delayed until calling @gst_base_video_decoder_finish_frame.
+ *
+ * Subclass is also responsible for providing (presentation) timestamps
+ * (likely based on corresponding input ones). If that is not applicable
+ * or possible, baseclass provides limited framerate based interpolation.
+ *
+ * Similarly, the baseclass provides some limited (legacy) seeking support
+ * (upon explicit subclass request), as full-fledged support
+ * should rather be left to upstream demuxer, parser or alike. This simple
+ * approach caters for seeking and duration reporting using estimated input
+ * bitrates.
+ *
+ * Baseclass provides some support for reverse playback, in particular
+ * in case incoming data is not packetized or upstream does not provide
+ * fragments on keyframe boundaries. However, subclass should then be prepared
+ * for the parsing and frame processing stage to occur separately (rather
+ * than otherwise the latter immediately following the former),
+ * and should ensure the parsing stage properly marks keyframes or rely on
+ * upstream to do so properly for incoming data.
+ *
+ * Things that subclass need to take care of:
+ * <itemizedlist>
+ * <listitem><para>Provide pad templates</para></listitem>
+ * <listitem><para>
+ * Set source pad caps when appropriate
+ * </para></listitem>
+ * <listitem><para>
+ * Configure some baseclass behaviour parameters.
+ * </para></listitem>
+ * <listitem><para>
+ * Optionally parse input data, if it is not considered packetized.
+ * Parse sync is obtained either by providing baseclass with a
+ * mask and pattern or a custom @scan_for_sync. When sync is established,
+ * @parse_data should invoke @gst_base_video_decoder_add_to_frame and
+ * @gst_base_video_decoder_have_frame as appropriate.
+ * </para></listitem>
+ * <listitem><para>
+ * Accept data in @handle_frame and provide decoded results to
+ * @gst_base_video_decoder_finish_frame.
+ * </para></listitem>
+ * </itemizedlist>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstbasevideodecoder.h"
+
+#include <string.h>
+
+GST_DEBUG_CATEGORY (basevideodecoder_debug);
+#define GST_CAT_DEFAULT basevideodecoder_debug
+
+static void gst_base_video_decoder_finalize (GObject * object);
+
+static gboolean gst_base_video_decoder_sink_setcaps (GstPad * pad,
+ GstCaps * caps);
+static gboolean gst_base_video_decoder_sink_event (GstPad * pad,
+ GstEvent * event);
+static gboolean gst_base_video_decoder_src_event (GstPad * pad,
+ GstEvent * event);
+static GstFlowReturn gst_base_video_decoder_chain (GstPad * pad,
+ GstBuffer * buf);
+static gboolean gst_base_video_decoder_sink_query (GstPad * pad,
+ GstQuery * query);
+static GstStateChangeReturn gst_base_video_decoder_change_state (GstElement *
+ element, GstStateChange transition);
+static const GstQueryType *gst_base_video_decoder_get_query_types (GstPad *
+ pad);
+static gboolean gst_base_video_decoder_src_query (GstPad * pad,
+ GstQuery * query);
+static void gst_base_video_decoder_reset (GstBaseVideoDecoder *
+ base_video_decoder, gboolean full);
+
+static GstFlowReturn
+gst_base_video_decoder_have_frame_2 (GstBaseVideoDecoder * base_video_decoder);
+
+static guint64
+gst_base_video_decoder_get_timestamp (GstBaseVideoDecoder * base_video_decoder,
+ int picture_number);
+static guint64
+gst_base_video_decoder_get_field_timestamp (GstBaseVideoDecoder *
+ base_video_decoder, int field_offset);
+static guint64 gst_base_video_decoder_get_field_duration (GstBaseVideoDecoder *
+ base_video_decoder, int n_fields);
+static GstVideoFrame *gst_base_video_decoder_new_frame (GstBaseVideoDecoder *
+ base_video_decoder);
+static void gst_base_video_decoder_free_frame (GstVideoFrame * frame);
+
+static void gst_base_video_decoder_clear_queues (GstBaseVideoDecoder * dec);
+
+GST_BOILERPLATE (GstBaseVideoDecoder, gst_base_video_decoder,
+ GstBaseVideoCodec, GST_TYPE_BASE_VIDEO_CODEC);
+
+static void
+gst_base_video_decoder_base_init (gpointer g_class)
+{
+ GST_DEBUG_CATEGORY_INIT (basevideodecoder_debug, "basevideodecoder", 0,
+ "Base Video Decoder");
+
+}
+
+static void
+gst_base_video_decoder_class_init (GstBaseVideoDecoderClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = G_OBJECT_CLASS (klass);
+ gstelement_class = GST_ELEMENT_CLASS (klass);
+
+ gobject_class->finalize = gst_base_video_decoder_finalize;
+
+ gstelement_class->change_state =
+ GST_DEBUG_FUNCPTR (gst_base_video_decoder_change_state);
+
+ parent_class = g_type_class_peek_parent (klass);
+}
+
+static void
+gst_base_video_decoder_init (GstBaseVideoDecoder * base_video_decoder,
+ GstBaseVideoDecoderClass * klass)
+{
+ GstPad *pad;
+
+ GST_DEBUG_OBJECT (base_video_decoder, "gst_base_video_decoder_init");
+
+ pad = GST_BASE_VIDEO_CODEC_SINK_PAD (base_video_decoder);
+
+ gst_pad_set_chain_function (pad,
+ GST_DEBUG_FUNCPTR (gst_base_video_decoder_chain));
+ gst_pad_set_event_function (pad,
+ GST_DEBUG_FUNCPTR (gst_base_video_decoder_sink_event));
+ gst_pad_set_setcaps_function (pad,
+ GST_DEBUG_FUNCPTR (gst_base_video_decoder_sink_setcaps));
+ gst_pad_set_query_function (pad,
+ GST_DEBUG_FUNCPTR (gst_base_video_decoder_sink_query));
+
+ pad = GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder);
+
+ gst_pad_set_event_function (pad,
+ GST_DEBUG_FUNCPTR (gst_base_video_decoder_src_event));
+ gst_pad_set_query_type_function (pad,
+ GST_DEBUG_FUNCPTR (gst_base_video_decoder_get_query_types));
+ gst_pad_set_query_function (pad,
+ GST_DEBUG_FUNCPTR (gst_base_video_decoder_src_query));
+ gst_pad_use_fixed_caps (pad);
+
+ base_video_decoder->input_adapter = gst_adapter_new ();
+ base_video_decoder->output_adapter = gst_adapter_new ();
+
+ gst_base_video_decoder_reset (base_video_decoder, TRUE);
+
+ base_video_decoder->sink_clipping = TRUE;
+}
+
+static gboolean
+gst_base_video_decoder_sink_setcaps (GstPad * pad, GstCaps * caps)
+{
+ GstBaseVideoDecoder *base_video_decoder;
+ GstBaseVideoDecoderClass *base_video_decoder_class;
+ GstStructure *structure;
+ const GValue *codec_data;
+ GstVideoState *state;
+ gboolean ret = TRUE;
+
+ base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
+ base_video_decoder_class =
+ GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
+
+ GST_DEBUG_OBJECT (base_video_decoder, "setcaps %" GST_PTR_FORMAT, caps);
+
+ state = &GST_BASE_VIDEO_CODEC (base_video_decoder)->state;
+
+ memset (state, 0, sizeof (GstVideoState));
+
+ structure = gst_caps_get_structure (caps, 0);
+
+ gst_video_format_parse_caps (caps, NULL, &state->width, &state->height);
+ /* this one fails if no framerate in caps */
+ if (!gst_video_parse_caps_framerate (caps, &state->fps_n, &state->fps_d)) {
+ state->fps_n = 0;
+ state->fps_d = 1;
+ }
+ /* but the p-a-r sets 1/1 instead, which is not quite informative ... */
+ if (!gst_structure_has_field (structure, "pixel-aspect-ratio") ||
+ !gst_video_parse_caps_pixel_aspect_ratio (caps,
+ &state->par_n, &state->par_d)) {
+ state->par_n = 0;
+ state->par_d = 1;
+ }
+
+ state->have_interlaced =
+ gst_video_format_parse_caps_interlaced (caps, &state->interlaced);
+
+ codec_data = gst_structure_get_value (structure, "codec_data");
+ if (codec_data && G_VALUE_TYPE (codec_data) == GST_TYPE_BUFFER) {
+ state->codec_data = gst_value_get_buffer (codec_data);
+ }
+
+ if (base_video_decoder_class->set_format) {
+ ret = base_video_decoder_class->set_format (base_video_decoder,
+ &GST_BASE_VIDEO_CODEC (base_video_decoder)->state);
+ }
+
+ g_object_unref (base_video_decoder);
+
+ return ret;
+}
+
+static void
+gst_base_video_decoder_finalize (GObject * object)
+{
+ GstBaseVideoDecoder *base_video_decoder;
+
+ base_video_decoder = GST_BASE_VIDEO_DECODER (object);
+
+ GST_DEBUG_OBJECT (object, "finalize");
+
+ if (base_video_decoder->input_adapter) {
+ g_object_unref (base_video_decoder->input_adapter);
+ base_video_decoder->input_adapter = NULL;
+ }
+ if (base_video_decoder->output_adapter) {
+ g_object_unref (base_video_decoder->output_adapter);
+ base_video_decoder->output_adapter = NULL;
+ }
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+/* hard == FLUSH, otherwise discont */
+static GstFlowReturn
+gst_base_video_decoder_flush (GstBaseVideoDecoder * dec, gboolean hard)
+{
+ GstBaseVideoDecoderClass *klass;
+ GstFlowReturn ret = GST_FLOW_OK;
+
+ klass = GST_BASE_VIDEO_DECODER_GET_CLASS (dec);
+
+ GST_LOG_OBJECT (dec, "flush hard %d", hard);
+
+ /* FIXME make some more distinction between hard and soft,
+ * but subclass may not be prepared for that */
+ /* FIXME perhaps also clear pending frames ?,
+ * but again, subclass may still come up with one of those */
+ if (!hard) {
+ /* TODO ? finish/drain some stuff */
+ } else {
+ gst_segment_init (&GST_BASE_VIDEO_CODEC (dec)->segment,
+ GST_FORMAT_UNDEFINED);
+ gst_base_video_decoder_clear_queues (dec);
+ dec->error_count = 0;
+ }
+ /* and get (re)set for the sequel */
+ gst_base_video_decoder_reset (dec, FALSE);
+
+ /* also inform subclass */
+ /* FIXME ? only if hard, or tell it if hard ? */
+ if (klass->reset)
+ klass->reset (dec);
+
+ return ret;
+}
+
+static gboolean
+gst_base_video_decoder_sink_event (GstPad * pad, GstEvent * event)
+{
+ GstBaseVideoDecoder *base_video_decoder;
+ GstBaseVideoDecoderClass *base_video_decoder_class;
+ gboolean ret = FALSE;
+
+ base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
+ base_video_decoder_class =
+ GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
+
+ GST_DEBUG_OBJECT (base_video_decoder,
+ "received event %d, %s", GST_EVENT_TYPE (event),
+ GST_EVENT_TYPE_NAME (event));
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_EOS:
+ {
+ if (!base_video_decoder->packetized) {
+ GstFlowReturn flow_ret;
+
+ do {
+ flow_ret =
+ base_video_decoder_class->parse_data (base_video_decoder, TRUE);
+ } while (flow_ret == GST_FLOW_OK);
+ }
+
+ if (base_video_decoder_class->finish) {
+ base_video_decoder_class->finish (base_video_decoder);
+ }
+
+ ret =
+ gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder),
+ event);
+ }
+ break;
+ case GST_EVENT_NEWSEGMENT:
+ {
+ gboolean update;
+ double rate, arate;
+ GstFormat format;
+ gint64 start;
+ gint64 stop;
+ gint64 pos;
+ GstSegment *segment = &GST_BASE_VIDEO_CODEC (base_video_decoder)->segment;
+
+ gst_event_parse_new_segment_full (event, &update, &rate,
+ &arate, &format, &start, &stop, &pos);
+
+ if (format == GST_FORMAT_TIME) {
+ GST_DEBUG_OBJECT (base_video_decoder,
+ "received TIME NEW_SEGMENT %" GST_TIME_FORMAT
+ " -- %" GST_TIME_FORMAT ", pos %" GST_TIME_FORMAT
+ ", rate %g, applied_rate %g",
+ GST_TIME_ARGS (start), GST_TIME_ARGS (stop), GST_TIME_ARGS (pos),
+ rate, arate);
+ } else {
+ GstFormat dformat = GST_FORMAT_TIME;
+
+ GST_DEBUG_OBJECT (base_video_decoder,
+ "received NEW_SEGMENT %" G_GINT64_FORMAT
+ " -- %" G_GINT64_FORMAT ", time %" G_GINT64_FORMAT
+ ", rate %g, applied_rate %g", start, stop, pos, rate, arate);
+ /* handle newsegment as a result from our legacy simple seeking */
+ /* note that initial 0 should convert to 0 in any case */
+ if (base_video_decoder->do_byte_time &&
+ gst_pad_query_convert (GST_BASE_VIDEO_CODEC_SINK_PAD
+ (base_video_decoder), GST_FORMAT_BYTES, start, &dformat,
+ &start)) {
+ /* best attempt convert */
+ /* as these are only estimates, stop is kept open-ended to avoid
+ * premature cutting */
+ GST_DEBUG_OBJECT (base_video_decoder,
+ "converted to TIME start %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (start));
+ pos = start;
+ stop = GST_CLOCK_TIME_NONE;
+ /* replace event */
+ gst_event_unref (event);
+ event = gst_event_new_new_segment_full (update, rate, arate,
+ GST_FORMAT_TIME, start, stop, pos);
+ } else {
+ goto newseg_wrong_format;
+ }
+ }
+
+ if (!update) {
+ gst_base_video_decoder_flush (base_video_decoder, FALSE);
+ }
+
+ base_video_decoder->timestamp_offset = start;
+
+ gst_segment_set_newsegment_full (segment,
+ update, rate, arate, format, start, stop, pos);
+
+ ret =
+ gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder),
+ event);
+ break;
+ }
+ case GST_EVENT_FLUSH_STOP:
+ {
+ /* well, this is kind of worse than a DISCONT */
+ gst_base_video_decoder_flush (base_video_decoder, TRUE);
+ }
+ default:
+ /* FIXME this changes the order of events */
+ ret =
+ gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder),
+ event);
+ break;
+ }
+
+done:
+ gst_object_unref (base_video_decoder);
+ return ret;
+
+newseg_wrong_format:
+ {
+ GST_DEBUG_OBJECT (base_video_decoder, "received non TIME newsegment");
+ gst_event_unref (event);
+ goto done;
+ }
+}
+
+/* perform upstream byte <-> time conversion (duration, seeking)
+ * if subclass allows and if enough data for moderately decent conversion */
+static inline gboolean
+gst_base_video_decoder_do_byte (GstBaseVideoDecoder * dec)
+{
+ GstBaseVideoCodec *codec = GST_BASE_VIDEO_CODEC (dec);
+
+ return dec->do_byte_time && (codec->bytes > 0) && (codec->time > GST_SECOND);
+}
+
+static gboolean
+gst_base_video_decoder_do_seek (GstBaseVideoDecoder * dec, GstEvent * event)
+{
+ GstBaseVideoCodec *codec = GST_BASE_VIDEO_CODEC (dec);
+ GstSeekFlags flags;
+ GstSeekType start_type, end_type;
+ GstFormat format;
+ gdouble rate;
+ gint64 start, start_time, end_time;
+ GstSegment seek_segment;
+ guint32 seqnum;
+
+ gst_event_parse_seek (event, &rate, &format, &flags, &start_type,
+ &start_time, &end_type, &end_time);
+
+ /* we'll handle plain open-ended flushing seeks with the simple approach */
+ if (rate != 1.0) {
+ GST_DEBUG_OBJECT (dec, "unsupported seek: rate");
+ return FALSE;
+ }
+
+ if (start_type != GST_SEEK_TYPE_SET) {
+ GST_DEBUG_OBJECT (dec, "unsupported seek: start time");
+ return FALSE;
+ }
+
+ if (end_type != GST_SEEK_TYPE_NONE ||
+ (end_type == GST_SEEK_TYPE_SET && end_time != GST_CLOCK_TIME_NONE)) {
+ GST_DEBUG_OBJECT (dec, "unsupported seek: end time");
+ return FALSE;
+ }
+
+ if (!(flags & GST_SEEK_FLAG_FLUSH)) {
+ GST_DEBUG_OBJECT (dec, "unsupported seek: not flushing");
+ return FALSE;
+ }
+
+ memcpy (&seek_segment, &codec->segment, sizeof (seek_segment));
+ gst_segment_set_seek (&seek_segment, rate, format, flags, start_type,
+ start_time, end_type, end_time, NULL);
+ start_time = seek_segment.last_stop;
+
+ format = GST_FORMAT_BYTES;
+ if (!gst_pad_query_convert (codec->sinkpad, GST_FORMAT_TIME, start_time,
+ &format, &start)) {
+ GST_DEBUG_OBJECT (dec, "conversion failed");
+ return FALSE;
+ }
+
+ seqnum = gst_event_get_seqnum (event);
+ event = gst_event_new_seek (1.0, GST_FORMAT_BYTES, flags,
+ GST_SEEK_TYPE_SET, start, GST_SEEK_TYPE_NONE, -1);
+ gst_event_set_seqnum (event, seqnum);
+
+ GST_DEBUG_OBJECT (dec, "seeking to %" GST_TIME_FORMAT " at byte offset %"
+ G_GINT64_FORMAT, GST_TIME_ARGS (start_time), start);
+
+ return gst_pad_push_event (codec->sinkpad, event);
+}
+
+static gboolean
+gst_base_video_decoder_src_event (GstPad * pad, GstEvent * event)
+{
+ GstBaseVideoDecoder *base_video_decoder;
+ gboolean res = FALSE;
+
+ base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
+
+ GST_DEBUG_OBJECT (base_video_decoder,
+ "received event %d, %s", GST_EVENT_TYPE (event),
+ GST_EVENT_TYPE_NAME (event));
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_SEEK:
+ {
+ GstFormat format, tformat;
+ gdouble rate;
+ GstSeekFlags flags;
+ GstSeekType cur_type, stop_type;
+ gint64 cur, stop;
+ gint64 tcur, tstop;
+ guint32 seqnum;
+
+ gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur,
+ &stop_type, &stop);
+ seqnum = gst_event_get_seqnum (event);
+
+ /* upstream gets a chance first */
+ if ((res =
+ gst_pad_push_event (GST_BASE_VIDEO_CODEC_SINK_PAD
+ (base_video_decoder), event)))
+ break;
+
+ /* if upstream fails for a time seek, maybe we can help if allowed */
+ if (format == GST_FORMAT_TIME) {
+ if (gst_base_video_decoder_do_byte (base_video_decoder))
+ res = gst_base_video_decoder_do_seek (base_video_decoder, event);
+ break;
+ }
+
+ /* ... though a non-time seek can be aided as well */
+ /* First bring the requested format to time */
+ tformat = GST_FORMAT_TIME;
+ if (!(res = gst_pad_query_convert (pad, format, cur, &tformat, &tcur)))
+ goto convert_error;
+ if (!(res = gst_pad_query_convert (pad, format, stop, &tformat, &tstop)))
+ goto convert_error;
+
+ /* then seek with time on the peer */
+ event = gst_event_new_seek (rate, GST_FORMAT_TIME,
+ flags, cur_type, tcur, stop_type, tstop);
+ gst_event_set_seqnum (event, seqnum);
+
+ res =
+ gst_pad_push_event (GST_BASE_VIDEO_CODEC_SINK_PAD
+ (base_video_decoder), event);
+ break;
+ }
+ case GST_EVENT_QOS:
+ {
+ gdouble proportion;
+ GstClockTimeDiff diff;
+ GstClockTime timestamp;
+ GstClockTime duration;
+
+ gst_event_parse_qos (event, &proportion, &diff, ×tamp);
+
+ GST_OBJECT_LOCK (base_video_decoder);
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->proportion = proportion;
+ if (G_LIKELY (GST_CLOCK_TIME_IS_VALID (timestamp))) {
+ if (G_UNLIKELY (diff > 0)) {
+ if (GST_BASE_VIDEO_CODEC (base_video_decoder)->state.fps_n > 0)
+ duration =
+ gst_util_uint64_scale (GST_SECOND,
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->state.fps_d,
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->state.fps_n);
+ else
+ duration = 0;
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->earliest_time =
+ timestamp + 2 * diff + duration;
+ } else {
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->earliest_time =
+ timestamp + diff;
+ }
+ } else {
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->earliest_time =
+ GST_CLOCK_TIME_NONE;
+ }
+ GST_OBJECT_UNLOCK (base_video_decoder);
+
+ GST_DEBUG_OBJECT (base_video_decoder,
+ "got QoS %" GST_TIME_FORMAT ", %" G_GINT64_FORMAT ", %g",
+ GST_TIME_ARGS (timestamp), diff, proportion);
+
+ res =
+ gst_pad_push_event (GST_BASE_VIDEO_CODEC_SINK_PAD
+ (base_video_decoder), event);
+ break;
+ }
+ default:
+ res =
+ gst_pad_push_event (GST_BASE_VIDEO_CODEC_SINK_PAD
+ (base_video_decoder), event);
+ break;
+ }
+done:
+ gst_object_unref (base_video_decoder);
+ return res;
+
+convert_error:
+ GST_DEBUG_OBJECT (base_video_decoder, "could not convert format");
+ goto done;
+}
+
+static const GstQueryType *
+gst_base_video_decoder_get_query_types (GstPad * pad)
+{
+ static const GstQueryType query_types[] = {
+ GST_QUERY_POSITION,
+ GST_QUERY_DURATION,
+ GST_QUERY_CONVERT,
+ 0
+ };
+
+ return query_types;
+}
+
+static gboolean
+gst_base_video_decoder_src_query (GstPad * pad, GstQuery * query)
+{
+ GstBaseVideoDecoder *dec;
+ gboolean res = TRUE;
+
+ dec = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
+
+ GST_LOG_OBJECT (dec, "handling query: %" GST_PTR_FORMAT, query);
+
+ switch (GST_QUERY_TYPE (query)) {
+ case GST_QUERY_POSITION:
+ {
+ GstFormat format;
+ gint64 time, value;
+
+ /* upstream gets a chance first */
+ if ((res =
+ gst_pad_peer_query (GST_BASE_VIDEO_CODEC_SINK_PAD (dec),
+ query))) {
+ GST_LOG_OBJECT (dec, "returning peer response");
+ break;
+ }
+
+ /* we start from the last seen time */
+ time = dec->last_timestamp;
+ /* correct for the segment values */
+ time = gst_segment_to_stream_time (&GST_BASE_VIDEO_CODEC (dec)->segment,
+ GST_FORMAT_TIME, time);
+
+ GST_LOG_OBJECT (dec,
+ "query %p: our time: %" GST_TIME_FORMAT, query, GST_TIME_ARGS (time));
+
+ /* and convert to the final format */
+ gst_query_parse_position (query, &format, NULL);
+ if (!(res = gst_pad_query_convert (pad, GST_FORMAT_TIME, time,
+ &format, &value)))
+ break;
+
+ gst_query_set_position (query, format, value);
+
+ GST_LOG_OBJECT (dec,
+ "query %p: we return %" G_GINT64_FORMAT " (format %u)", query, value,
+ format);
+ break;
+ }
+ case GST_QUERY_DURATION:
+ {
+ GstFormat format;
+
+ /* upstream in any case */
+ if ((res = gst_pad_query_default (pad, query)))
+ break;
+
+ gst_query_parse_duration (query, &format, NULL);
+ /* try answering TIME by converting from BYTE if subclass allows */
+ if (format == GST_FORMAT_TIME && gst_base_video_decoder_do_byte (dec)) {
+ gint64 value;
+
+ format = GST_FORMAT_BYTES;
+ if (gst_pad_query_peer_duration (GST_BASE_VIDEO_CODEC_SINK_PAD (dec),
+ &format, &value)) {
+ GST_LOG_OBJECT (dec, "upstream size %" G_GINT64_FORMAT, value);
+ format = GST_FORMAT_TIME;
+ if (gst_pad_query_convert (GST_BASE_VIDEO_CODEC_SINK_PAD (dec),
+ GST_FORMAT_BYTES, value, &format, &value)) {
+ gst_query_set_duration (query, GST_FORMAT_TIME, value);
+ res = TRUE;
+ }
+ }
+ }
+ break;
+ }
+ case GST_QUERY_CONVERT:
+ {
+ GstFormat src_fmt, dest_fmt;
+ gint64 src_val, dest_val;
+
+ GST_DEBUG_OBJECT (dec, "convert query");
+
+ gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
+ res = gst_base_video_rawvideo_convert (&GST_BASE_VIDEO_CODEC (dec)->state,
+ src_fmt, src_val, &dest_fmt, &dest_val);
+ if (!res)
+ goto error;
+ gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
+ break;
+ }
+ default:
+ res = gst_pad_query_default (pad, query);
+ }
+ gst_object_unref (dec);
+ return res;
+
+error:
+ GST_ERROR_OBJECT (dec, "query failed");
+ gst_object_unref (dec);
+ return res;
+}
+
+static gboolean
+gst_base_video_decoder_sink_query (GstPad * pad, GstQuery * query)
+{
+ GstBaseVideoDecoder *base_video_decoder;
+ gboolean res = FALSE;
+
+ base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
+
+ GST_LOG_OBJECT (base_video_decoder, "handling query: %" GST_PTR_FORMAT,
+ query);
+
+ switch (GST_QUERY_TYPE (query)) {
+ case GST_QUERY_CONVERT:
+ {
+ GstBaseVideoCodec *codec = GST_BASE_VIDEO_CODEC (base_video_decoder);
+ GstFormat src_fmt, dest_fmt;
+ gint64 src_val, dest_val;
+
+ gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
+ res = gst_base_video_encoded_video_convert (&codec->state, codec->bytes,
+ codec->time, src_fmt, src_val, &dest_fmt, &dest_val);
+ if (!res)
+ goto error;
+ gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
+ break;
+ }
+ default:
+ res = gst_pad_query_default (pad, query);
+ break;
+ }
+done:
+ gst_object_unref (base_video_decoder);
+
+ return res;
+error:
+ GST_DEBUG_OBJECT (base_video_decoder, "query failed");
+ goto done;
+}
+
+typedef struct _Timestamp Timestamp;
+struct _Timestamp
+{
+ guint64 offset;
+ GstClockTime timestamp;
+ GstClockTime duration;
+};
+
+static void
+gst_base_video_decoder_add_timestamp (GstBaseVideoDecoder * base_video_decoder,
+ GstBuffer * buffer)
+{
+ Timestamp *ts;
+
+ ts = g_malloc (sizeof (Timestamp));
+
+ GST_LOG_OBJECT (base_video_decoder,
+ "adding timestamp %" GST_TIME_FORMAT " %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (base_video_decoder->input_offset),
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)));
+
+ ts->offset = base_video_decoder->input_offset;
+ ts->timestamp = GST_BUFFER_TIMESTAMP (buffer);
+ ts->duration = GST_BUFFER_DURATION (buffer);
+
+ base_video_decoder->timestamps =
+ g_list_append (base_video_decoder->timestamps, ts);
+}
+
+static void
+gst_base_video_decoder_get_timestamp_at_offset (GstBaseVideoDecoder *
+ base_video_decoder, guint64 offset, GstClockTime * timestamp,
+ GstClockTime * duration)
+{
+ Timestamp *ts;
+ GList *g;
+
+ *timestamp = GST_CLOCK_TIME_NONE;
+ *duration = GST_CLOCK_TIME_NONE;
+
+ g = base_video_decoder->timestamps;
+ while (g) {
+ ts = g->data;
+ if (ts->offset <= offset) {
+ *timestamp = ts->timestamp;
+ *duration = ts->duration;
+ g_free (ts);
+ g = g_list_next (g);
+ base_video_decoder->timestamps =
+ g_list_remove (base_video_decoder->timestamps, ts);
+ } else {
+ break;
+ }
+ }
+
+ GST_LOG_OBJECT (base_video_decoder,
+ "got timestamp %" GST_TIME_FORMAT " %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (offset), GST_TIME_ARGS (*timestamp));
+}
+
+static void
+gst_base_video_decoder_clear_queues (GstBaseVideoDecoder * dec)
+{
+ g_list_foreach (dec->queued, (GFunc) gst_mini_object_unref, NULL);
+ g_list_free (dec->queued);
+ dec->queued = NULL;
+ g_list_foreach (dec->gather, (GFunc) gst_mini_object_unref, NULL);
+ g_list_free (dec->gather);
+ dec->gather = NULL;
+ g_list_foreach (dec->decode, (GFunc) gst_base_video_decoder_free_frame, NULL);
+ g_list_free (dec->decode);
+ dec->decode = NULL;
+ g_list_foreach (dec->parse, (GFunc) gst_mini_object_unref, NULL);
+ g_list_free (dec->parse);
+ dec->decode = NULL;
+ g_list_foreach (dec->parse_gather, (GFunc) gst_base_video_decoder_free_frame,
+ NULL);
+ g_list_free (dec->parse_gather);
+ dec->decode = NULL;
+}
+
+static void
+gst_base_video_decoder_reset (GstBaseVideoDecoder * base_video_decoder,
+ gboolean full)
+{
+ GST_DEBUG_OBJECT (base_video_decoder, "reset full %d", full);
+
+ if (full) {
+ gst_segment_init (&GST_BASE_VIDEO_CODEC (base_video_decoder)->segment,
+ GST_FORMAT_UNDEFINED);
+ gst_base_video_decoder_clear_queues (base_video_decoder);
+ base_video_decoder->error_count = 0;
+ }
+
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->discont = TRUE;
+ base_video_decoder->have_sync = FALSE;
+
+ base_video_decoder->timestamp_offset = GST_CLOCK_TIME_NONE;
+ base_video_decoder->field_index = 0;
+ base_video_decoder->last_timestamp = GST_CLOCK_TIME_NONE;
+
+ base_video_decoder->input_offset = 0;
+ base_video_decoder->frame_offset = 0;
+ gst_adapter_clear (base_video_decoder->input_adapter);
+ gst_adapter_clear (base_video_decoder->output_adapter);
+ g_list_foreach (base_video_decoder->timestamps, (GFunc) g_free, NULL);
+ g_list_free (base_video_decoder->timestamps);
+ base_video_decoder->timestamps = NULL;
+
+ if (base_video_decoder->current_frame) {
+ gst_base_video_decoder_free_frame (base_video_decoder->current_frame);
+ base_video_decoder->current_frame = NULL;
+ }
+
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->system_frame_number = 0;
+ base_video_decoder->base_picture_number = 0;
+
+ GST_OBJECT_LOCK (base_video_decoder);
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->earliest_time =
+ GST_CLOCK_TIME_NONE;
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->proportion = 0.5;
+ GST_OBJECT_UNLOCK (base_video_decoder);
+}
+
+static GstFlowReturn
+gst_base_video_decoder_chain_forward (GstBaseVideoDecoder * base_video_decoder,
+ GstBuffer * buf)
+{
+ GstBaseVideoDecoderClass *klass;
+ GstFlowReturn ret;
+
+ klass = GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
+
+ g_return_val_if_fail (base_video_decoder->packetized || klass->parse_data,
+ GST_FLOW_ERROR);
+
+ if (base_video_decoder->current_frame == NULL) {
+ base_video_decoder->current_frame =
+ gst_base_video_decoder_new_frame (base_video_decoder);
+ }
+
+ if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
+ gst_base_video_decoder_add_timestamp (base_video_decoder, buf);
+ }
+ base_video_decoder->input_offset += GST_BUFFER_SIZE (buf);
+
+ if (base_video_decoder->packetized) {
+ base_video_decoder->current_frame->sink_buffer = buf;
+
+ if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT))
+ base_video_decoder->current_frame->is_sync_point = TRUE;
+
+ ret = gst_base_video_decoder_have_frame_2 (base_video_decoder);
+ } else {
+
+ gst_adapter_push (base_video_decoder->input_adapter, buf);
+
+ if (!base_video_decoder->have_sync) {
+ int n, m;
+
+ GST_DEBUG_OBJECT (base_video_decoder, "no sync, scanning");
+
+ n = gst_adapter_available (base_video_decoder->input_adapter);
+ if (klass->capture_mask != 0) {
+ m = gst_adapter_masked_scan_uint32 (base_video_decoder->input_adapter,
+ klass->capture_mask, klass->capture_pattern, 0, n - 3);
+ } else if (klass->scan_for_sync) {
+ m = klass->scan_for_sync (base_video_decoder, FALSE, 0, n);
+ } else {
+ m = 0;
+ }
+ if (m == -1) {
+ GST_ERROR_OBJECT (base_video_decoder, "scan returned no sync");
+ gst_adapter_flush (base_video_decoder->input_adapter, n - 3);
+
+ return GST_FLOW_OK;
+ } else {
+ if (m > 0) {
+ if (m >= n) {
+ GST_ERROR_OBJECT (base_video_decoder,
+ "subclass scanned past end %d >= %d", m, n);
+ }
+
+ gst_adapter_flush (base_video_decoder->input_adapter, m);
+
+ if (m < n) {
+ GST_DEBUG_OBJECT (base_video_decoder,
+ "found possible sync after %d bytes (of %d)", m, n);
+
+ /* this is only "maybe" sync */
+ base_video_decoder->have_sync = TRUE;
+ }
+ }
+
+ }
+ }
+
+ do {
+ ret = klass->parse_data (base_video_decoder, FALSE);
+ } while (ret == GST_FLOW_OK);
+
+ if (ret == GST_BASE_VIDEO_DECODER_FLOW_NEED_DATA) {
+ return GST_FLOW_OK;
+ }
+ }
+
+ return ret;
+}
+
+static GstFlowReturn
+gst_base_video_decoder_flush_decode (GstBaseVideoDecoder * dec)
+{
+ GstFlowReturn res = GST_FLOW_OK;
+ GList *walk;
+
+ walk = dec->decode;
+
+ GST_DEBUG_OBJECT (dec, "flushing buffers to decode");
+
+ /* clear buffer and decoder state */
+ gst_base_video_decoder_flush (dec, FALSE);
+
+ /* signal have_frame it should not capture frames */
+ dec->process = TRUE;
+
+ while (walk) {
+ GList *next;
+ GstVideoFrame *frame = (GstVideoFrame *) (walk->data);
+ GstBuffer *buf = frame->sink_buffer;
+
+ GST_DEBUG_OBJECT (dec, "decoding frame %p, ts %" GST_TIME_FORMAT,
+ buf, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
+
+ next = g_list_next (walk);
+ if (dec->current_frame)
+ gst_base_video_decoder_free_frame (dec->current_frame);
+ dec->current_frame = frame;
+ /* decode buffer, resulting data prepended to queue */
+ res = gst_base_video_decoder_have_frame_2 (dec);
+
+ walk = next;
+ }
+
+ dec->process = FALSE;
+
+ return res;
+}
+
+static GstFlowReturn
+gst_base_video_decoder_flush_parse (GstBaseVideoDecoder * dec)
+{
+ GstFlowReturn res = GST_FLOW_OK;
+ GList *walk;
+
+ walk = dec->parse;
+
+ GST_DEBUG_OBJECT (dec, "flushing buffers to parsing");
+
+ /* clear buffer and decoder state */
+ gst_base_video_decoder_flush (dec, FALSE);
+
+ while (walk) {
+ GList *next;
+ GstBuffer *buf = GST_BUFFER_CAST (walk->data);
+
+ GST_DEBUG_OBJECT (dec, "parsing buffer %p, ts %" GST_TIME_FORMAT,
+ buf, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
+
+ next = g_list_next (walk);
+ /* parse buffer, resulting frames prepended to parse_gather queue */
+ gst_buffer_ref (buf);
+ res = gst_base_video_decoder_chain_forward (dec, buf);
+
+ /* if we generated output, we can discard the buffer, else we
+ * keep it in the queue */
+ if (dec->parse_gather) {
+ GST_DEBUG_OBJECT (dec, "parsed buffer to %p", dec->parse_gather->data);
+ dec->parse = g_list_delete_link (dec->parse, walk);
+ gst_buffer_unref (buf);
+ } else {
+ GST_DEBUG_OBJECT (dec, "buffer did not decode, keeping");
+ }
+ walk = next;
+ }
+
+ /* now we can process frames */
+ GST_DEBUG_OBJECT (dec, "checking frames");
+ while (dec->parse_gather) {
+ GstVideoFrame *frame;
+
+ frame = (GstVideoFrame *) (dec->parse_gather->data);
+ /* remove from the gather list */
+ dec->parse_gather =
+ g_list_delete_link (dec->parse_gather, dec->parse_gather);
+ /* copy to decode queue */
+ dec->decode = g_list_prepend (dec->decode, frame);
+
+ /* if we copied a keyframe, flush and decode the decode queue */
+ if (frame->is_sync_point) {
+ GST_DEBUG_OBJECT (dec, "copied keyframe");
+ res = gst_base_video_decoder_flush_decode (dec);
+ }
+ }
+
+ /* now send queued data downstream */
+ while (dec->queued) {
+ GstBuffer *buf = GST_BUFFER_CAST (dec->queued->data);
+
+ if (G_LIKELY (res == GST_FLOW_OK)) {
+ GST_DEBUG_OBJECT (dec, "pushing buffer %p of size %u, "
+ "time %" GST_TIME_FORMAT ", dur %" GST_TIME_FORMAT, buf,
+ GST_BUFFER_SIZE (buf), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
+ GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
+ /* should be already, but let's be sure */
+ buf = gst_buffer_make_metadata_writable (buf);
+ /* avoid stray DISCONT from forward processing,
+ * which have no meaning in reverse pushing */
+ GST_BUFFER_FLAG_UNSET (buf, GST_BUFFER_FLAG_DISCONT);
+ res = gst_pad_push (GST_BASE_VIDEO_CODEC_SRC_PAD (dec), buf);
+ } else {
+ gst_buffer_unref (buf);
+ }
+
+ dec->queued = g_list_delete_link (dec->queued, dec->queued);
+ }
+
+ return res;
+}
+
+static GstFlowReturn
+gst_base_video_decoder_chain_reverse (GstBaseVideoDecoder * dec,
+ GstBuffer * buf)
+{
+ GstFlowReturn result = GST_FLOW_OK;
+
+ /* if we have a discont, move buffers to the decode list */
+ if (!buf || GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DISCONT)) {
+ GST_DEBUG_OBJECT (dec, "received discont");
+ while (dec->gather) {
+ GstBuffer *gbuf;
+
+ gbuf = GST_BUFFER_CAST (dec->gather->data);
+ /* remove from the gather list */
+ dec->gather = g_list_delete_link (dec->gather, dec->gather);
+ /* copy to parse queue */
+ dec->parse = g_list_prepend (dec->parse, gbuf);
+ }
+ /* parse and decode stuff in the parse queue */
+ gst_base_video_decoder_flush_parse (dec);
+ }
+
+ if (G_LIKELY (buf)) {
+ GST_DEBUG_OBJECT (dec, "gathering buffer %p of size %u, "
+ "time %" GST_TIME_FORMAT ", dur %" GST_TIME_FORMAT, buf,
+ GST_BUFFER_SIZE (buf), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
+ GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
+
+ /* add buffer to gather queue */
+ dec->gather = g_list_prepend (dec->gather, buf);
+ }
+
+ return result;
+}
+
+static GstFlowReturn
+gst_base_video_decoder_chain (GstPad * pad, GstBuffer * buf)
+{
+ GstBaseVideoDecoder *base_video_decoder;
+
+ base_video_decoder = GST_BASE_VIDEO_DECODER (GST_PAD_PARENT (pad));
+
+ GST_LOG_OBJECT (base_video_decoder,
+ "chain %" GST_TIME_FORMAT " duration %" GST_TIME_FORMAT " size %d",
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
+ GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_SIZE (buf));
+
+ /* NOTE:
+ * requiring the pad to be negotiated makes it impossible to use
+ * oggdemux or filesrc ! decoder */
+
+ if (GST_BASE_VIDEO_CODEC (base_video_decoder)->segment.format ==
+ GST_FORMAT_UNDEFINED) {
+ GstEvent *event;
+ GstFlowReturn ret;
+
+ GST_WARNING_OBJECT (base_video_decoder,
+ "Received buffer without a new-segment. "
+ "Assuming timestamps start from 0.");
+
+ gst_segment_set_newsegment_full (&GST_BASE_VIDEO_CODEC
+ (base_video_decoder)->segment, FALSE, 1.0, 1.0, GST_FORMAT_TIME, 0,
+ GST_CLOCK_TIME_NONE, 0);
+
+ event = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME, 0,
+ GST_CLOCK_TIME_NONE, 0);
+
+ ret =
+ gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder),
+ event);
+ if (!ret) {
+ GST_ERROR_OBJECT (base_video_decoder, "new segment event ret=%d", ret);
+ return GST_FLOW_ERROR;
+ }
+ }
+
+ if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DISCONT))) {
+ gint64 ts, index;
+
+ GST_DEBUG_OBJECT (base_video_decoder, "received DISCONT buffer");
+ gst_base_video_decoder_flush (base_video_decoder, FALSE);
+
+ /* track present position */
+ ts = base_video_decoder->timestamp_offset;
+ index = base_video_decoder->field_index;
+
+ /* buffer may claim DISCONT loudly, if it can't tell us where we are now,
+ * we'll stick to where we were ...
+ * Particularly useful/needed for upstream BYTE based */
+ if (GST_BASE_VIDEO_CODEC (base_video_decoder)->segment.rate > 0.0 &&
+ !GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
+ GST_DEBUG_OBJECT (base_video_decoder,
+ "... but restoring previous ts tracking");
+ base_video_decoder->timestamp_offset = ts;
+ base_video_decoder->field_index = index & ~1;
+ }
+ }
+
+ if (GST_BASE_VIDEO_CODEC (base_video_decoder)->segment.rate > 0.0)
+ return gst_base_video_decoder_chain_forward (base_video_decoder, buf);
+ else
+ return gst_base_video_decoder_chain_reverse (base_video_decoder, buf);
+}
+
+static GstStateChangeReturn
+gst_base_video_decoder_change_state (GstElement * element,
+ GstStateChange transition)
+{
+ GstBaseVideoDecoder *base_video_decoder;
+ GstBaseVideoDecoderClass *base_video_decoder_class;
+ GstStateChangeReturn ret;
+
+ base_video_decoder = GST_BASE_VIDEO_DECODER (element);
+ base_video_decoder_class = GST_BASE_VIDEO_DECODER_GET_CLASS (element);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_READY_TO_PAUSED:
+ if (base_video_decoder_class->start) {
+ base_video_decoder_class->start (base_video_decoder);
+ }
+ default:
+ break;
+ }
+
+ ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ if (base_video_decoder_class->stop) {
+ base_video_decoder_class->stop (base_video_decoder);
+ }
+ gst_base_video_decoder_reset (base_video_decoder, TRUE);
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static void
+gst_base_video_decoder_free_frame (GstVideoFrame * frame)
+{
+ g_return_if_fail (frame != NULL);
+
+ if (frame->sink_buffer) {
+ gst_buffer_unref (frame->sink_buffer);
+ }
+ if (frame->src_buffer) {
+ gst_buffer_unref (frame->src_buffer);
+ }
+
+ g_free (frame);
+}
+
+static GstVideoFrame *
+gst_base_video_decoder_new_frame (GstBaseVideoDecoder * base_video_decoder)
+{
+ GstVideoFrame *frame;
+
+ frame = g_malloc0 (sizeof (GstVideoFrame));
+
+ frame->system_frame_number =
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->system_frame_number;
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->system_frame_number++;
+
+ frame->decode_frame_number = frame->system_frame_number -
+ base_video_decoder->reorder_depth;
+
+ frame->decode_timestamp = GST_CLOCK_TIME_NONE;
+ frame->presentation_timestamp = GST_CLOCK_TIME_NONE;
+ frame->presentation_duration = GST_CLOCK_TIME_NONE;
+ frame->n_fields = 2;
+
+ return frame;
+}
+
+/**
+ * gst_base_video_decoder_finish_frame:
+ * @base_video_decoder: a #GstBaseVideoDecoder
+ * @frame: a decoded #GstVideoFrame
+ *
+ * @frame should have a valid decoded data buffer, whose metadata fields
+ * are then appropriately set according to frame data and pushed downstream.
+ * If no output data is provided, @frame is considered skipped.
+ * In any case, the frame is considered finished and released.
+ *
+ * Returns: a #GstFlowReturn resulting from sending data downstream
+ */
+GstFlowReturn
+gst_base_video_decoder_finish_frame (GstBaseVideoDecoder * base_video_decoder,
+ GstVideoFrame * frame)
+{
+ GstVideoState *state = &GST_BASE_VIDEO_CODEC (base_video_decoder)->state;
+ GstBuffer *src_buffer;
+ GstFlowReturn ret = GST_FLOW_OK;
+
+ GST_LOG_OBJECT (base_video_decoder, "finish frame");
+ GST_LOG_OBJECT (base_video_decoder, "n %d in %d out %d",
+ g_list_length (GST_BASE_VIDEO_CODEC (base_video_decoder)->frames),
+ gst_adapter_available (base_video_decoder->input_adapter),
+ gst_adapter_available (base_video_decoder->output_adapter));
+
+ GST_LOG_OBJECT (base_video_decoder,
+ "finish frame sync=%d pts=%" GST_TIME_FORMAT, frame->is_sync_point,
+ GST_TIME_ARGS (frame->presentation_timestamp));
+
+ if (GST_CLOCK_TIME_IS_VALID (frame->presentation_timestamp)) {
+ if (frame->presentation_timestamp != base_video_decoder->timestamp_offset) {
+ GST_DEBUG_OBJECT (base_video_decoder,
+ "sync timestamp %" GST_TIME_FORMAT " diff %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (frame->presentation_timestamp),
+ GST_TIME_ARGS (frame->presentation_timestamp -
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->segment.start));
+ base_video_decoder->timestamp_offset = frame->presentation_timestamp;
+ base_video_decoder->field_index &= 1;
+ } else {
+ /* This case is for one initial timestamp and no others, e.g.,
+ * filesrc ! decoder ! xvimagesink */
+ GST_WARNING_OBJECT (base_video_decoder,
+ "sync timestamp didn't change, ignoring");
+ frame->presentation_timestamp = GST_CLOCK_TIME_NONE;
+ }
+ } else {
+ if (frame->is_sync_point) {
+ GST_WARNING_OBJECT (base_video_decoder,
+ "sync point doesn't have timestamp");
+ if (!GST_CLOCK_TIME_IS_VALID (base_video_decoder->timestamp_offset)) {
+ GST_WARNING_OBJECT (base_video_decoder,
+ "No base timestamp. Assuming frames start at segment start");
+ base_video_decoder->timestamp_offset =
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->segment.start;
+ base_video_decoder->field_index &= 1;
+ }
+ }
+ }
+ frame->field_index = base_video_decoder->field_index;
+ base_video_decoder->field_index += frame->n_fields;
+
+ if (frame->presentation_timestamp == GST_CLOCK_TIME_NONE) {
+ frame->presentation_timestamp =
+ gst_base_video_decoder_get_field_timestamp (base_video_decoder,
+ frame->field_index);
+ frame->presentation_duration = GST_CLOCK_TIME_NONE;
+ frame->decode_timestamp =
+ gst_base_video_decoder_get_timestamp (base_video_decoder,
+ frame->decode_frame_number);
+ }
+ if (frame->presentation_duration == GST_CLOCK_TIME_NONE) {
+ frame->presentation_duration =
+ gst_base_video_decoder_get_field_duration (base_video_decoder,
+ frame->n_fields);
+ }
+
+ if (GST_CLOCK_TIME_IS_VALID (base_video_decoder->last_timestamp)) {
+ if (frame->presentation_timestamp < base_video_decoder->last_timestamp) {
+ GST_WARNING_OBJECT (base_video_decoder,
+ "decreasing timestamp (%" GST_TIME_FORMAT " < %"
+ GST_TIME_FORMAT ")", GST_TIME_ARGS (frame->presentation_timestamp),
+ GST_TIME_ARGS (base_video_decoder->last_timestamp));
+ }
+ }
+ base_video_decoder->last_timestamp = frame->presentation_timestamp;
+
+ /* no buffer data means this frame is skipped/dropped */
+ if (!frame->src_buffer) {
+ GST_DEBUG_OBJECT (base_video_decoder, "skipping frame %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (frame->presentation_timestamp));
+ goto done;
+ }
+
+ src_buffer = gst_buffer_make_metadata_writable (frame->src_buffer);
+ frame->src_buffer = NULL;
+
+ GST_BUFFER_FLAG_UNSET (src_buffer, GST_BUFFER_FLAG_DELTA_UNIT);
+ if (state->interlaced) {
+ int tff = state->top_field_first;
+
+ if (frame->field_index & 1) {
+ tff ^= 1;
+ }
+ if (tff) {
+ GST_BUFFER_FLAG_SET (src_buffer, GST_VIDEO_BUFFER_TFF);
+ } else {
+ GST_BUFFER_FLAG_UNSET (src_buffer, GST_VIDEO_BUFFER_TFF);
+ }
+ GST_BUFFER_FLAG_UNSET (src_buffer, GST_VIDEO_BUFFER_RFF);
+ GST_BUFFER_FLAG_UNSET (src_buffer, GST_VIDEO_BUFFER_ONEFIELD);
+ if (frame->n_fields == 3) {
+ GST_BUFFER_FLAG_SET (src_buffer, GST_VIDEO_BUFFER_RFF);
+ } else if (frame->n_fields == 1) {
+ GST_BUFFER_FLAG_SET (src_buffer, GST_VIDEO_BUFFER_ONEFIELD);
+ }
+ }
+ if (GST_BASE_VIDEO_CODEC (base_video_decoder)->discont) {
+ GST_BUFFER_FLAG_SET (src_buffer, GST_BUFFER_FLAG_DISCONT);
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->discont = FALSE;
+ }
+
+ GST_BUFFER_TIMESTAMP (src_buffer) = frame->presentation_timestamp;
+ GST_BUFFER_DURATION (src_buffer) = frame->presentation_duration;
+ GST_BUFFER_OFFSET (src_buffer) = GST_BUFFER_OFFSET_NONE;
+ GST_BUFFER_OFFSET_END (src_buffer) = GST_BUFFER_OFFSET_NONE;
+
+ /* update rate estimate */
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->bytes +=
+ GST_BUFFER_SIZE (src_buffer);
+ if (GST_CLOCK_TIME_IS_VALID (frame->presentation_duration)) {
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->time +=
+ frame->presentation_duration;
+ } else {
+ /* better none than nothing valid */
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->time = GST_CLOCK_TIME_NONE;
+ }
+
+ gst_buffer_set_caps (src_buffer,
+ GST_PAD_CAPS (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder)));
+
+ GST_LOG_OBJECT (base_video_decoder, "pushing frame ts %" GST_TIME_FORMAT
+ ", duration %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer)),
+ GST_TIME_ARGS (GST_BUFFER_DURATION (src_buffer)));
+
+ if (base_video_decoder->sink_clipping) {
+ gint64 start = GST_BUFFER_TIMESTAMP (src_buffer);
+ gint64 stop = GST_BUFFER_TIMESTAMP (src_buffer) +
+ GST_BUFFER_DURATION (src_buffer);
+ GstSegment *segment = &GST_BASE_VIDEO_CODEC (base_video_decoder)->segment;
+
+ if (gst_segment_clip (segment, GST_FORMAT_TIME, start, stop, &start, &stop)) {
+ GST_BUFFER_TIMESTAMP (src_buffer) = start;
+ GST_BUFFER_DURATION (src_buffer) = stop - start;
+ GST_LOG_OBJECT (base_video_decoder,
+ "accepting buffer inside segment: %" GST_TIME_FORMAT
+ " %" GST_TIME_FORMAT
+ " seg %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT
+ " time %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer)),
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer) +
+ GST_BUFFER_DURATION (src_buffer)),
+ GST_TIME_ARGS (segment->start),
+ GST_TIME_ARGS (segment->stop), GST_TIME_ARGS (segment->time));
+ } else {
+ GST_LOG_OBJECT (base_video_decoder,
+ "dropping buffer outside segment: %" GST_TIME_FORMAT
+ " %" GST_TIME_FORMAT
+ " seg %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT
+ " time %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer)),
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (src_buffer) +
+ GST_BUFFER_DURATION (src_buffer)),
+ GST_TIME_ARGS (segment->start),
+ GST_TIME_ARGS (segment->stop), GST_TIME_ARGS (segment->time));
+ gst_buffer_unref (src_buffer);
+ return GST_FLOW_OK;
+ }
+ }
+
+ /* we got data, so note things are looking up again */
+ if (G_UNLIKELY (base_video_decoder->error_count))
+ base_video_decoder->error_count--;
+
+ if (GST_BASE_VIDEO_CODEC (base_video_decoder)->segment.rate < 0.0) {
+ GST_LOG_OBJECT (base_video_decoder, "queued buffer");
+ base_video_decoder->queued =
+ g_list_prepend (base_video_decoder->queued, src_buffer);
+ } else {
+ ret = gst_pad_push (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder),
+ src_buffer);
+ }
+
+done:
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->frames =
+ g_list_remove (GST_BASE_VIDEO_CODEC (base_video_decoder)->frames, frame);
+ gst_base_video_decoder_free_frame (frame);
+
+ return ret;
+}
+
+/**
+ * gst_base_video_decoder_finish_frame:
+ * @base_video_decoder: a #GstBaseVideoDecoder
+ * @n_bytes: an encoded #GstVideoFrame
+ *
+ * Removes next @n_bytes of input data and adds it to currently parsed frame.
+ */
+void
+gst_base_video_decoder_add_to_frame (GstBaseVideoDecoder * base_video_decoder,
+ int n_bytes)
+{
+ GstBuffer *buf;
+
+ GST_LOG_OBJECT (base_video_decoder, "add %d bytes to frame", n_bytes);
+
+ if (n_bytes == 0)
+ return;
+
+ if (gst_adapter_available (base_video_decoder->output_adapter) == 0) {
+ base_video_decoder->frame_offset = base_video_decoder->input_offset -
+ gst_adapter_available (base_video_decoder->input_adapter);
+ }
+ buf = gst_adapter_take_buffer (base_video_decoder->input_adapter, n_bytes);
+
+ gst_adapter_push (base_video_decoder->output_adapter, buf);
+}
+
+static guint64
+gst_base_video_decoder_get_timestamp (GstBaseVideoDecoder * base_video_decoder,
+ int picture_number)
+{
+ GstVideoState *state = &GST_BASE_VIDEO_CODEC (base_video_decoder)->state;
+
+ if (state->fps_d == 0 || state->fps_n == 0) {
+ return -1;
+ }
+ if (picture_number < base_video_decoder->base_picture_number) {
+ return base_video_decoder->timestamp_offset -
+ (gint64) gst_util_uint64_scale (base_video_decoder->base_picture_number
+ - picture_number, state->fps_d * GST_SECOND, state->fps_n);
+ } else {
+ return base_video_decoder->timestamp_offset +
+ gst_util_uint64_scale (picture_number -
+ base_video_decoder->base_picture_number,
+ state->fps_d * GST_SECOND, state->fps_n);
+ }
+}
+
+static guint64
+gst_base_video_decoder_get_field_timestamp (GstBaseVideoDecoder *
+ base_video_decoder, int field_offset)
+{
+ GstVideoState *state = &GST_BASE_VIDEO_CODEC (base_video_decoder)->state;
+
+ if (state->fps_d == 0 || state->fps_n == 0) {
+ return GST_CLOCK_TIME_NONE;
+ }
+ if (field_offset < 0) {
+ GST_WARNING_OBJECT (base_video_decoder, "field offset < 0");
+ return GST_CLOCK_TIME_NONE;
+ }
+ return base_video_decoder->timestamp_offset +
+ gst_util_uint64_scale (field_offset, state->fps_d * GST_SECOND,
+ state->fps_n * 2);
+}
+
+static guint64
+gst_base_video_decoder_get_field_duration (GstBaseVideoDecoder *
+ base_video_decoder, int n_fields)
+{
+ GstVideoState *state = &GST_BASE_VIDEO_CODEC (base_video_decoder)->state;
+
+ if (state->fps_d == 0 || state->fps_n == 0) {
+ return GST_CLOCK_TIME_NONE;
+ }
+ if (n_fields < 0) {
+ GST_WARNING_OBJECT (base_video_decoder, "n_fields < 0");
+ return GST_CLOCK_TIME_NONE;
+ }
+ return gst_util_uint64_scale (n_fields, state->fps_d * GST_SECOND,
+ state->fps_n * 2);
+}
+
+/**
+ * gst_base_video_decoder_have_frame:
+ * @base_video_decoder: a #GstBaseVideoDecoder
+ *
+ * Gathers all data collected for currently parsed frame, gathers corresponding
+ * metadata and passes it along for further processing, i.e. @handle_frame.
+ *
+ * Returns: a #GstFlowReturn
+ */
+GstFlowReturn
+gst_base_video_decoder_have_frame (GstBaseVideoDecoder * base_video_decoder)
+{
+ GstBuffer *buffer;
+ int n_available;
+ GstClockTime timestamp;
+ GstClockTime duration;
+
+ GST_LOG_OBJECT (base_video_decoder, "have_frame");
+
+ n_available = gst_adapter_available (base_video_decoder->output_adapter);
+ if (n_available) {
+ buffer = gst_adapter_take_buffer (base_video_decoder->output_adapter,
+ n_available);
+ } else {
+ buffer = gst_buffer_new_and_alloc (0);
+ }
+
+ base_video_decoder->current_frame->sink_buffer = buffer;
+
+ gst_base_video_decoder_get_timestamp_at_offset (base_video_decoder,
+ base_video_decoder->frame_offset, ×tamp, &duration);
+
+ GST_BUFFER_TIMESTAMP (buffer) = timestamp;
+ GST_BUFFER_DURATION (buffer) = duration;
+
+ GST_LOG_OBJECT (base_video_decoder, "collected frame size %d, "
+ "ts %" GST_TIME_FORMAT ", dur %" GST_TIME_FORMAT,
+ n_available, GST_TIME_ARGS (timestamp), GST_TIME_ARGS (duration));
+
+ return gst_base_video_decoder_have_frame_2 (base_video_decoder);
+}
+
+static GstFlowReturn
+gst_base_video_decoder_have_frame_2 (GstBaseVideoDecoder * base_video_decoder)
+{
+ GstVideoFrame *frame = base_video_decoder->current_frame;
+ GstBaseVideoDecoderClass *base_video_decoder_class;
+ GstFlowReturn ret = GST_FLOW_OK;
+
+ base_video_decoder_class =
+ GST_BASE_VIDEO_DECODER_GET_CLASS (base_video_decoder);
+
+ g_return_val_if_fail (base_video_decoder_class->handle_frame != NULL,
+ GST_FLOW_ERROR);
+
+ /* capture frames and queue for later processing */
+ if (GST_BASE_VIDEO_CODEC (base_video_decoder)->segment.rate < 0.0 &&
+ !base_video_decoder->process) {
+ base_video_decoder->parse_gather =
+ g_list_prepend (base_video_decoder->parse_gather, frame);
+ goto exit;
+ }
+
+ frame->distance_from_sync = base_video_decoder->distance_from_sync;
+ base_video_decoder->distance_from_sync++;
+
+ frame->presentation_timestamp = GST_BUFFER_TIMESTAMP (frame->sink_buffer);
+ frame->presentation_duration = GST_BUFFER_DURATION (frame->sink_buffer);
+
+ GST_LOG_OBJECT (base_video_decoder, "pts %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (frame->presentation_timestamp));
+ GST_LOG_OBJECT (base_video_decoder, "dts %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (frame->decode_timestamp));
+ GST_LOG_OBJECT (base_video_decoder, "dist %d", frame->distance_from_sync);
+
+ GST_BASE_VIDEO_CODEC (base_video_decoder)->frames =
+ g_list_append (GST_BASE_VIDEO_CODEC (base_video_decoder)->frames, frame);
+
+ frame->deadline =
+ gst_segment_to_running_time (&GST_BASE_VIDEO_CODEC
+ (base_video_decoder)->segment, GST_FORMAT_TIME,
+ frame->presentation_timestamp);
+
+ /* do something with frame */
+ ret = base_video_decoder_class->handle_frame (base_video_decoder, frame);
+ if (ret != GST_FLOW_OK) {
+ GST_DEBUG_OBJECT (base_video_decoder, "flow error %s",
+ gst_flow_get_name (ret));
+ }
+
+exit:
+ /* create new frame */
+ base_video_decoder->current_frame =
+ gst_base_video_decoder_new_frame (base_video_decoder);
+
+ return ret;
+}
+
+/**
+ * gst_base_video_decoder_get_state:
+ * @base_video_decoder: a #GstBaseVideoDecoder
+ *
+ * Returns: #GstVideoState describing format of video data.
+ */
+GstVideoState *
+gst_base_video_decoder_get_state (GstBaseVideoDecoder * base_video_decoder)
+{
+ return &GST_BASE_VIDEO_CODEC (base_video_decoder)->state;
+}
+
+/**
+ * gst_base_video_decoder_lost_sync:
+ * @base_video_decoder: a #GstBaseVideoDecoder
+ *
+ * Advances out-of-sync input data by 1 byte and marks it accordingly.
+ */
+void
+gst_base_video_decoder_lost_sync (GstBaseVideoDecoder * base_video_decoder)
+{
+ g_return_if_fail (GST_IS_BASE_VIDEO_DECODER (base_video_decoder));
+
+ GST_DEBUG_OBJECT (base_video_decoder, "lost_sync");
+
+ if (gst_adapter_available (base_video_decoder->input_adapter) >= 1) {
+ gst_adapter_flush (base_video_decoder->input_adapter, 1);
+ }
+
+ base_video_decoder->have_sync = FALSE;
+}
+
+/* FIXME not quite exciting; get rid of this ? */
+/**
+ * gst_base_video_decoder_set_sync_point:
+ * @base_video_decoder: a #GstBaseVideoDecoder
+ *
+ * Marks current frame as a sync point, i.e. keyframe.
+ */
+void
+gst_base_video_decoder_set_sync_point (GstBaseVideoDecoder * base_video_decoder)
+{
+ GST_DEBUG_OBJECT (base_video_decoder, "set_sync_point");
+
+ base_video_decoder->current_frame->is_sync_point = TRUE;
+ base_video_decoder->distance_from_sync = 0;
+}
+
+/**
+ * gst_base_video_decoder_get_oldest_frame:
+ * @base_video_decoder: a #GstBaseVideoDecoder
+ *
+ * Returns: oldest pending unfinished #GstVideoFrame.
+ */
+GstVideoFrame *
+gst_base_video_decoder_get_oldest_frame (GstBaseVideoDecoder *
+ base_video_decoder)
+{
+ GList *g;
+
+ g = g_list_first (GST_BASE_VIDEO_CODEC (base_video_decoder)->frames);
+
+ if (g == NULL)
+ return NULL;
+ return (GstVideoFrame *) (g->data);
+}
+
+/**
+ * gst_base_video_decoder_get_frame:
+ * @base_video_decoder: a #GstBaseVideoDecoder
+ * @frame_number: system_frame_number of a frame
+ *
+ * Returns: pending unfinished #GstVideoFrame identified by @frame_number.
+ */
+GstVideoFrame *
+gst_base_video_decoder_get_frame (GstBaseVideoDecoder * base_video_decoder,
+ int frame_number)
+{
+ GList *g;
+
+ for (g = g_list_first (GST_BASE_VIDEO_CODEC (base_video_decoder)->frames);
+ g; g = g_list_next (g)) {
+ GstVideoFrame *frame = g->data;
+
+ if (frame->system_frame_number == frame_number) {
+ return frame;
+ }
+ }
+
+ return NULL;
+}
+
+/**
+ * gst_base_video_decoder_set_src_caps:
+ * @base_video_decoder: a #GstBaseVideoDecoder
+ *
+ * Sets src pad caps according to currently configured #GstVideoState.
+ *
+ */
+gboolean
+gst_base_video_decoder_set_src_caps (GstBaseVideoDecoder * base_video_decoder)
+{
+ GstCaps *caps;
+ GstVideoState *state = &GST_BASE_VIDEO_CODEC (base_video_decoder)->state;
+ gboolean ret;
+
+ /* minimum sense */
+ g_return_val_if_fail (state->format != GST_VIDEO_FORMAT_UNKNOWN, FALSE);
+ g_return_val_if_fail (state->width != 0, FALSE);
+ g_return_val_if_fail (state->height != 0, FALSE);
+
+ /* sanitize */
+ if (state->fps_n == 0 || state->fps_d == 0) {
+ state->fps_n = 0;
+ state->fps_d = 1;
+ }
+ if (state->par_n == 0 || state->par_d == 0) {
+ state->par_n = 1;
+ state->par_d = 1;
+ }
+
+ caps = gst_video_format_new_caps (state->format,
+ state->width, state->height,
+ state->fps_n, state->fps_d, state->par_n, state->par_d);
+ gst_caps_set_simple (caps, "interlaced",
+ G_TYPE_BOOLEAN, state->interlaced, NULL);
+
+ GST_DEBUG_OBJECT (base_video_decoder, "setting caps %" GST_PTR_FORMAT, caps);
+
+ ret =
+ gst_pad_set_caps (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder),
+ caps);
+ gst_caps_unref (caps);
+
+ /* arrange for derived info */
+ state->bytes_per_picture =
+ gst_video_format_get_size (state->format, state->width, state->height);
+
+ return ret;
+}
+
+/**
+ * gst_base_video_decoder_alloc_src_buffer:
+ * @base_video_decoder: a #GstBaseVideoDecoder
+ *
+ * Helper function that uses gst_pad_alloc_buffer_and_set_caps
+ * to allocate a buffer to hold a video frame for @base_video_decoder's
+ * current #GstVideoState.
+ *
+ * Returns: allocated buffer
+ */
+GstBuffer *
+gst_base_video_decoder_alloc_src_buffer (GstBaseVideoDecoder *
+ base_video_decoder)
+{
+ GstBuffer *buffer;
+ GstFlowReturn flow_ret;
+ int num_bytes;
+ GstVideoState *state = &GST_BASE_VIDEO_CODEC (base_video_decoder)->state;
+
+ num_bytes = gst_video_format_get_size (state->format, state->width,
+ state->height);
+ GST_DEBUG ("alloc src buffer caps=%" GST_PTR_FORMAT,
+ GST_PAD_CAPS (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder)));
+ flow_ret =
+ gst_pad_alloc_buffer_and_set_caps (GST_BASE_VIDEO_CODEC_SRC_PAD
+ (base_video_decoder), GST_BUFFER_OFFSET_NONE, num_bytes,
+ GST_PAD_CAPS (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder)),
+ &buffer);
+
+ if (flow_ret != GST_FLOW_OK) {
+ buffer = gst_buffer_new_and_alloc (num_bytes);
+ gst_buffer_set_caps (buffer,
+ GST_PAD_CAPS (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder)));
+ }
+
+ return buffer;
+}
+
+/**
+ * gst_base_video_decoder_alloc_src_frame:
+ * @base_video_decoder: a #GstBaseVideoDecoder
+ * @frame: a #GstVideoFrame
+ *
+ * Helper function that uses gst_pad_alloc_buffer_and_set_caps
+ * to allocate a buffer to hold a video frame for @base_video_decoder's
+ * current #GstVideoState. Subclass should already have configured video state
+ * and set src pad caps.
+ *
+ * Returns: result from pad alloc call
+ */
+GstFlowReturn
+gst_base_video_decoder_alloc_src_frame (GstBaseVideoDecoder *
+ base_video_decoder, GstVideoFrame * frame)
+{
+ GstFlowReturn flow_ret;
+ GstVideoState *state = &GST_BASE_VIDEO_CODEC (base_video_decoder)->state;
+ int num_bytes = state->bytes_per_picture;
+
+ g_return_val_if_fail (state->bytes_per_picture != 0, GST_FLOW_ERROR);
+ g_return_val_if_fail (GST_PAD_CAPS (GST_BASE_VIDEO_CODEC_SRC_PAD
+ (base_video_decoder)) != NULL, GST_FLOW_ERROR);
+
+ GST_LOG_OBJECT (base_video_decoder, "alloc buffer size %d", num_bytes);
+ flow_ret =
+ gst_pad_alloc_buffer_and_set_caps (GST_BASE_VIDEO_CODEC_SRC_PAD
+ (base_video_decoder), GST_BUFFER_OFFSET_NONE, num_bytes,
+ GST_PAD_CAPS (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder)),
+ &frame->src_buffer);
+
+ if (flow_ret != GST_FLOW_OK) {
+ GST_WARNING_OBJECT (base_video_decoder, "failed to get buffer %s",
+ gst_flow_get_name (flow_ret));
+ }
+
+ return flow_ret;
+}
+
+/**
+ * gst_base_video_decoder_get_max_decode_time:
+ * @base_video_decoder: a #GstBaseVideoDecoder
+ * @frame: a #GstVideoFrame
+ *
+ * Determines maximum possible decoding time for @frame that will
+ * allow it to decode and arrive in time (as determined by QoS messages).
+ * In particular, a negative result means decoding in time is no longer possible
+ * and should therefore occur as soon/skippy as possible.
+ *
+ * Returns: max decoding time.
+ */
+GstClockTimeDiff
+gst_base_video_decoder_get_max_decode_time (GstBaseVideoDecoder *
+ base_video_decoder, GstVideoFrame * frame)
+{
+ GstClockTimeDiff deadline;
+ GstClockTime earliest_time;
+
+ earliest_time = GST_BASE_VIDEO_CODEC (base_video_decoder)->earliest_time;
+ if (GST_CLOCK_TIME_IS_VALID (earliest_time))
+ deadline = GST_CLOCK_DIFF (earliest_time, frame->deadline);
+ else
+ deadline = G_MAXINT64;
+
+ GST_LOG_OBJECT (base_video_decoder, "earliest %" GST_TIME_FORMAT
+ ", frame deadline %" GST_TIME_FORMAT ", deadline %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (earliest_time), GST_TIME_ARGS (frame->deadline),
+ GST_TIME_ARGS (deadline));
+
+ return deadline;
+}
+
+/**
+ * gst_base_video_decoder_get_oldest_frame:
+ * @base_video_decoder_class: a #GstBaseVideoDecoderClass
+ *
+ * Sets the mask and pattern that will be scanned for to obtain parse sync.
+ * Note that a non-zero @mask implies that @scan_for_sync will be ignored.
+ *
+ */
+void
+gst_base_video_decoder_class_set_capture_pattern (GstBaseVideoDecoderClass *
+ base_video_decoder_class, guint32 mask, guint32 pattern)
+{
+ g_return_if_fail (((~mask) & pattern) == 0);
+
+ GST_DEBUG ("capture mask %08x, pattern %08x", mask, pattern);
+
+ base_video_decoder_class->capture_mask = mask;
+ base_video_decoder_class->capture_pattern = pattern;
+}
+
+GstFlowReturn
+_gst_base_video_decoder_error (GstBaseVideoDecoder * dec, gint weight,
+ GQuark domain, gint code, gchar * txt, gchar * dbg, const gchar * file,
+ const gchar * function, gint line)
+{
+ if (txt)
+ GST_WARNING_OBJECT (dec, "error: %s", txt);
+ if (dbg)
+ GST_WARNING_OBJECT (dec, "error: %s", dbg);
+ dec->error_count += weight;
+ GST_BASE_VIDEO_CODEC (dec)->discont = TRUE;
+ if (dec->max_errors < dec->error_count) {
+ gst_element_message_full (GST_ELEMENT (dec), GST_MESSAGE_ERROR,
+ domain, code, txt, dbg, file, function, line);
+ return GST_FLOW_ERROR;
+ } else {
+ return GST_FLOW_OK;
+ }
+}
--- /dev/null
+/* GStreamer
+ * Copyright (C) 2008 David Schleef <ds@schleef.org>
+ * Copyright (C) 2011 Mark Nauwelaerts <mark.nauwelaerts@collabora.co.uk>.
+ * Copyright (C) 2011 Nokia Corporation. All rights reserved.
+ * Contact: Stefan Kost <stefan.kost@nokia.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * SECTION:gstbasevideoencoder
+ * @short_description: Base class for video encoders
+ * @see_also: #GstBaseTransform
+ *
+ * This base class is for video encoders turning raw video into
+ * encoded video data.
+ *
+ * GstBaseVideoEncoder and subclass should cooperate as follows.
+ * <orderedlist>
+ * <listitem>
+ * <itemizedlist><title>Configuration</title>
+ * <listitem><para>
+ * Initially, GstBaseVideoEncoder calls @start when the encoder element
+ * is activated, which allows subclass to perform any global setup.
+ * </para></listitem>
+ * <listitem><para>
+ * GstBaseVideoEncoder calls @set_format to inform subclass of the format
+ * of input video data that it is about to receive. Subclass should
+ * setup for encoding and configure base class as appropriate
+ * (e.g. latency). While unlikely, it might be called more than once,
+ * if changing input parameters require reconfiguration. Baseclass
+ * will ensure that processing of current configuration is finished.
+ * </para></listitem>
+ * <listitem><para>
+ * GstBaseVideoEncoder calls @stop at end of all processing.
+ * </para></listitem>
+ * </itemizedlist>
+ * </listitem>
+ * <listitem>
+ * <itemizedlist>
+ * <title>Data processing</title>
+ * <listitem><para>
+ * Base class collects input data and metadata into a frame and hands
+ * this to subclass' @handle_frame.
+ * </para></listitem>
+ * <listitem><para>
+ * If codec processing results in encoded data, subclass should call
+ * @gst_base_video_encoder_finish_frame to have encoded data pushed
+ * downstream.
+ * </para></listitem>
+ * <listitem><para>
+ * If implemented, baseclass calls subclass @shape_output which then sends
+ * data downstream in desired form. Otherwise, it is sent as-is.
+ * </para></listitem>
+ * <listitem><para>
+ * GstBaseVideoEncoderClass will handle both srcpad and sinkpad events.
+ * Sink events will be passed to subclass if @event callback has been
+ * provided.
+ * </para></listitem>
+ * </itemizedlist>
+ * </listitem>
+ * <listitem>
+ * <itemizedlist><title>Shutdown phase</title>
+ * <listitem><para>
+ * GstBaseVideoEncoder class calls @stop to inform the subclass that data
+ * parsing will be stopped.
+ * </para></listitem>
+ * </itemizedlist>
+ * </listitem>
+ * </orderedlist>
+ *
+ * Subclass is responsible for providing pad template caps for
+ * source and sink pads. The pads need to be named "sink" and "src". It should
+ * also be able to provide fixed src pad caps in @getcaps by the time it calls
+ * @gst_base_video_encoder_finish_frame.
+ *
+ * Things that subclass need to take care of:
+ * <itemizedlist>
+ * <listitem><para>Provide pad templates</para></listitem>
+ * <listitem><para>
+ * Provide source pad caps in @get_caps.
+ * </para></listitem>
+ * <listitem><para>
+ * Accept data in @handle_frame and provide encoded results to
+ * @gst_base_video_encoder_finish_frame.
+ * </para></listitem>
+ * </itemizedlist>
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstbasevideoencoder.h"
+
+GST_DEBUG_CATEGORY (basevideoencoder_debug);
+#define GST_CAT_DEFAULT basevideoencoder_debug
+
+static void gst_base_video_encoder_finalize (GObject * object);
+
+static gboolean gst_base_video_encoder_sink_setcaps (GstPad * pad,
+ GstCaps * caps);
+static gboolean gst_base_video_encoder_src_event (GstPad * pad,
+ GstEvent * event);
+static gboolean gst_base_video_encoder_sink_event (GstPad * pad,
+ GstEvent * event);
+static GstFlowReturn gst_base_video_encoder_chain (GstPad * pad,
+ GstBuffer * buf);
+static GstStateChangeReturn gst_base_video_encoder_change_state (GstElement *
+ element, GstStateChange transition);
+static const GstQueryType *gst_base_video_encoder_get_query_types (GstPad *
+ pad);
+static gboolean gst_base_video_encoder_src_query (GstPad * pad,
+ GstQuery * query);
+
+
+static void
+_do_init (GType object_type)
+{
+ const GInterfaceInfo preset_interface_info = {
+ NULL, /* interface_init */
+ NULL, /* interface_finalize */
+ NULL /* interface_data */
+ };
+
+ g_type_add_interface_static (object_type, GST_TYPE_PRESET,
+ &preset_interface_info);
+}
+
+GST_BOILERPLATE_FULL (GstBaseVideoEncoder, gst_base_video_encoder,
+ GstBaseVideoCodec, GST_TYPE_BASE_VIDEO_CODEC, _do_init);
+
+static void
+gst_base_video_encoder_base_init (gpointer g_class)
+{
+ GST_DEBUG_CATEGORY_INIT (basevideoencoder_debug, "basevideoencoder", 0,
+ "Base Video Encoder");
+
+}
+
+static void
+gst_base_video_encoder_class_init (GstBaseVideoEncoderClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = G_OBJECT_CLASS (klass);
+ gstelement_class = GST_ELEMENT_CLASS (klass);
+
+ gobject_class->finalize = gst_base_video_encoder_finalize;
+
+ gstelement_class->change_state =
+ GST_DEBUG_FUNCPTR (gst_base_video_encoder_change_state);
+
+ parent_class = g_type_class_peek_parent (klass);
+}
+
+static void
+gst_base_video_encoder_reset (GstBaseVideoEncoder * base_video_encoder)
+{
+ base_video_encoder->presentation_frame_number = 0;
+ base_video_encoder->distance_from_sync = 0;
+ base_video_encoder->force_keyframe = FALSE;
+
+ base_video_encoder->set_output_caps = FALSE;
+ base_video_encoder->drained = TRUE;
+ base_video_encoder->min_latency = 0;
+ base_video_encoder->max_latency = 0;
+
+ if (base_video_encoder->force_keyunit_event) {
+ gst_event_unref (base_video_encoder->force_keyunit_event);
+ base_video_encoder->force_keyunit_event = NULL;
+ }
+}
+
+static void
+gst_base_video_encoder_init (GstBaseVideoEncoder * base_video_encoder,
+ GstBaseVideoEncoderClass * klass)
+{
+ GstPad *pad;
+
+ GST_DEBUG_OBJECT (base_video_encoder, "gst_base_video_encoder_init");
+
+ pad = GST_BASE_VIDEO_CODEC_SINK_PAD (base_video_encoder);
+
+ gst_pad_set_chain_function (pad,
+ GST_DEBUG_FUNCPTR (gst_base_video_encoder_chain));
+ gst_pad_set_event_function (pad,
+ GST_DEBUG_FUNCPTR (gst_base_video_encoder_sink_event));
+ gst_pad_set_setcaps_function (pad,
+ GST_DEBUG_FUNCPTR (gst_base_video_encoder_sink_setcaps));
+
+ pad = GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_encoder);
+
+ gst_pad_set_query_type_function (pad,
+ GST_DEBUG_FUNCPTR (gst_base_video_encoder_get_query_types));
+ gst_pad_set_query_function (pad,
+ GST_DEBUG_FUNCPTR (gst_base_video_encoder_src_query));
+ gst_pad_set_event_function (pad,
+ GST_DEBUG_FUNCPTR (gst_base_video_encoder_src_event));
+
+ base_video_encoder->a.at_eos = FALSE;
+
+ /* encoder is expected to do so */
+ base_video_encoder->sink_clipping = TRUE;
+}
+
+static gboolean
+gst_base_video_encoder_drain (GstBaseVideoEncoder * enc)
+{
+ GstBaseVideoCodec *codec;
+ GstBaseVideoEncoderClass *enc_class;
+ gboolean ret = TRUE;
+
+ codec = GST_BASE_VIDEO_CODEC (enc);
+ enc_class = GST_BASE_VIDEO_ENCODER_GET_CLASS (enc);
+
+ GST_DEBUG_OBJECT (enc, "draining");
+
+ if (enc->drained) {
+ GST_DEBUG_OBJECT (enc, "already drained");
+ return TRUE;
+ }
+
+ if (enc_class->finish) {
+ GST_DEBUG_OBJECT (enc, "requesting subclass to finish");
+ ret = enc_class->finish (enc);
+ }
+ /* everything should be away now */
+ if (codec->frames) {
+ /* not fatal/impossible though if subclass/codec eats stuff */
+ GST_WARNING_OBJECT (enc, "still %d frames left after draining",
+ g_list_length (codec->frames));
+#if 0
+ /* FIXME should do this, but subclass may come up with it later on ?
+ * and would then need refcounting or so on frames */
+ g_list_foreach (codec->frames,
+ (GFunc) gst_base_video_codec_free_frame, NULL);
+#endif
+ }
+
+ return ret;
+}
+
+static gboolean
+gst_base_video_encoder_sink_setcaps (GstPad * pad, GstCaps * caps)
+{
+ GstBaseVideoEncoder *base_video_encoder;
+ GstBaseVideoEncoderClass *base_video_encoder_class;
+ GstStructure *structure;
+ GstVideoState *state;
+ gboolean ret;
+ gboolean changed = FALSE, u, v;
+ GstVideoFormat fmt;
+ gint w, h, num, den;
+
+ base_video_encoder = GST_BASE_VIDEO_ENCODER (gst_pad_get_parent (pad));
+ base_video_encoder_class =
+ GST_BASE_VIDEO_ENCODER_GET_CLASS (base_video_encoder);
+
+ /* subclass should do something here ... */
+ g_return_val_if_fail (base_video_encoder_class->set_format != NULL, FALSE);
+
+ GST_DEBUG_OBJECT (base_video_encoder, "setcaps %" GST_PTR_FORMAT, caps);
+
+ state = &GST_BASE_VIDEO_CODEC (base_video_encoder)->state;
+ structure = gst_caps_get_structure (caps, 0);
+
+ ret = gst_video_format_parse_caps (caps, &fmt, &w, &h);
+ if (!ret)
+ goto exit;
+
+ if (fmt != state->format || w != state->width || h != state->height) {
+ changed = TRUE;
+ state->format = fmt;
+ state->width = w;
+ state->height = h;
+ }
+
+ num = 0;
+ den = 1;
+ gst_video_parse_caps_framerate (caps, &num, &den);
+ if (den == 0) {
+ num = 0;
+ den = 1;
+ }
+ if (num != state->fps_n || den != state->fps_d) {
+ changed = TRUE;
+ state->fps_n = num;
+ state->fps_d = den;
+ }
+
+ num = 0;
+ den = 1;
+ gst_video_parse_caps_pixel_aspect_ratio (caps, &num, &den);
+ if (den == 0) {
+ num = 0;
+ den = 1;
+ }
+ if (num != state->par_n || den != state->par_d) {
+ changed = TRUE;
+ state->par_n = num;
+ state->par_d = den;
+ }
+
+ u = gst_structure_get_boolean (structure, "interlaced", &v);
+ if (u != state->have_interlaced || v != state->interlaced) {
+ changed = TRUE;
+ state->have_interlaced = u;
+ state->interlaced = v;
+ }
+
+ state->bytes_per_picture =
+ gst_video_format_get_size (state->format, state->width, state->height);
+ state->clean_width = state->width;
+ state->clean_height = state->height;
+ state->clean_offset_left = 0;
+ state->clean_offset_top = 0;
+
+ if (changed) {
+ /* arrange draining pending frames */
+ gst_base_video_encoder_drain (base_video_encoder);
+
+ /* and subclass should be ready to configure format at any time around */
+ if (base_video_encoder_class->set_format)
+ ret = base_video_encoder_class->set_format (base_video_encoder, state);
+ } else {
+ /* no need to stir things up */
+ GST_DEBUG_OBJECT (base_video_encoder,
+ "new video format identical to configured format");
+ ret = TRUE;
+ }
+
+exit:
+ g_object_unref (base_video_encoder);
+
+ if (!ret) {
+ GST_WARNING_OBJECT (base_video_encoder, "rejected caps %" GST_PTR_FORMAT,
+ caps);
+ }
+
+ return ret;
+}
+
+static void
+gst_base_video_encoder_finalize (GObject * object)
+{
+ GST_DEBUG_OBJECT (object, "finalize");
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static gboolean
+gst_base_video_encoder_sink_eventfunc (GstBaseVideoEncoder * base_video_encoder,
+ GstEvent * event)
+{
+ gboolean ret = FALSE;
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_EOS:
+ {
+ base_video_encoder->a.at_eos = TRUE;
+ gst_base_video_encoder_drain (base_video_encoder);
+ break;
+ }
+ case GST_EVENT_NEWSEGMENT:
+ {
+ gboolean update;
+ double rate;
+ double applied_rate;
+ GstFormat format;
+ gint64 start;
+ gint64 stop;
+ gint64 position;
+
+ gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate,
+ &format, &start, &stop, &position);
+
+ GST_DEBUG_OBJECT (base_video_encoder, "newseg rate %g, applied rate %g, "
+ "format %d, start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
+ ", pos = %" GST_TIME_FORMAT, rate, applied_rate, format,
+ GST_TIME_ARGS (start), GST_TIME_ARGS (stop),
+ GST_TIME_ARGS (position));
+
+ if (format != GST_FORMAT_TIME) {
+ GST_DEBUG_OBJECT (base_video_encoder, "received non TIME newsegment");
+ break;
+ }
+
+ base_video_encoder->a.at_eos = FALSE;
+
+ gst_segment_set_newsegment_full (&GST_BASE_VIDEO_CODEC
+ (base_video_encoder)->segment, update, rate, applied_rate, format,
+ start, stop, position);
+ break;
+ }
+ case GST_EVENT_CUSTOM_DOWNSTREAM:
+ {
+ const GstStructure *s;
+
+ s = gst_event_get_structure (event);
+
+ if (gst_structure_has_name (s, "GstForceKeyUnit")) {
+ GST_OBJECT_LOCK (base_video_encoder);
+ base_video_encoder->force_keyframe = TRUE;
+ if (base_video_encoder->force_keyunit_event)
+ gst_event_unref (base_video_encoder->force_keyunit_event);
+ base_video_encoder->force_keyunit_event = gst_event_copy (event);
+ GST_OBJECT_UNLOCK (base_video_encoder);
+ gst_event_unref (event);
+ ret = TRUE;
+ }
+ break;
+ }
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static gboolean
+gst_base_video_encoder_sink_event (GstPad * pad, GstEvent * event)
+{
+ GstBaseVideoEncoder *enc;
+ GstBaseVideoEncoderClass *klass;
+ gboolean handled = FALSE;
+ gboolean ret = TRUE;
+
+ enc = GST_BASE_VIDEO_ENCODER (gst_pad_get_parent (pad));
+ klass = GST_BASE_VIDEO_ENCODER_GET_CLASS (enc);
+
+ GST_DEBUG_OBJECT (enc, "received event %d, %s", GST_EVENT_TYPE (event),
+ GST_EVENT_TYPE_NAME (event));
+
+ if (klass->event)
+ handled = klass->event (enc, event);
+
+ if (!handled)
+ handled = gst_base_video_encoder_sink_eventfunc (enc, event);
+
+ if (!handled)
+ ret = gst_pad_event_default (pad, event);
+
+ GST_DEBUG_OBJECT (enc, "event handled");
+
+ gst_object_unref (enc);
+ return ret;
+}
+
+static gboolean
+gst_base_video_encoder_src_event (GstPad * pad, GstEvent * event)
+{
+ GstBaseVideoEncoder *base_video_encoder;
+ gboolean ret = FALSE;
+
+ base_video_encoder = GST_BASE_VIDEO_ENCODER (gst_pad_get_parent (pad));
+
+ GST_LOG_OBJECT (base_video_encoder, "handling event: %" GST_PTR_FORMAT,
+ event);
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_CUSTOM_UPSTREAM:
+ {
+ const GstStructure *s;
+
+ s = gst_event_get_structure (event);
+
+ if (gst_structure_has_name (s, "GstForceKeyUnit")) {
+ GST_OBJECT_LOCK (base_video_encoder);
+ base_video_encoder->force_keyframe = TRUE;
+ GST_OBJECT_UNLOCK (base_video_encoder);
+
+ gst_event_unref (event);
+ ret = TRUE;
+ } else {
+ ret =
+ gst_pad_push_event (GST_BASE_VIDEO_CODEC_SINK_PAD
+ (base_video_encoder), event);
+ }
+ break;
+ }
+ default:
+ ret =
+ gst_pad_push_event (GST_BASE_VIDEO_CODEC_SINK_PAD
+ (base_video_encoder), event);
+ break;
+ }
+
+ gst_object_unref (base_video_encoder);
+ return ret;
+}
+
+static const GstQueryType *
+gst_base_video_encoder_get_query_types (GstPad * pad)
+{
+ static const GstQueryType query_types[] = {
+ GST_QUERY_CONVERT,
+ GST_QUERY_LATENCY,
+ 0
+ };
+
+ return query_types;
+}
+
+static gboolean
+gst_base_video_encoder_src_query (GstPad * pad, GstQuery * query)
+{
+ GstBaseVideoEncoder *enc;
+ gboolean res;
+ GstPad *peerpad;
+
+ enc = GST_BASE_VIDEO_ENCODER (gst_pad_get_parent (pad));
+ peerpad = gst_pad_get_peer (GST_BASE_VIDEO_CODEC_SINK_PAD (enc));
+
+ GST_LOG_OBJECT (enc, "handling query: %" GST_PTR_FORMAT, query);
+
+ switch (GST_QUERY_TYPE (query)) {
+ case GST_QUERY_CONVERT:
+ {
+ GstBaseVideoCodec *codec = GST_BASE_VIDEO_CODEC (enc);
+ GstFormat src_fmt, dest_fmt;
+ gint64 src_val, dest_val;
+
+ gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
+ res = gst_base_video_encoded_video_convert (&codec->state,
+ codec->bytes, codec->time, src_fmt, src_val, &dest_fmt, &dest_val);
+ if (!res)
+ goto error;
+ gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
+ break;
+ }
+ case GST_QUERY_LATENCY:
+ {
+ gboolean live;
+ GstClockTime min_latency, max_latency;
+
+ res = gst_pad_query (peerpad, query);
+ if (res) {
+ gst_query_parse_latency (query, &live, &min_latency, &max_latency);
+ GST_DEBUG_OBJECT (enc, "Peer latency: live %d, min %"
+ GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
+ GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
+
+ GST_OBJECT_LOCK (enc);
+ min_latency += enc->min_latency;
+ if (max_latency != GST_CLOCK_TIME_NONE) {
+ max_latency += enc->max_latency;
+ }
+ GST_OBJECT_UNLOCK (enc);
+
+ gst_query_set_latency (query, live, min_latency, max_latency);
+ }
+ }
+ break;
+ default:
+ res = gst_pad_query_default (pad, query);
+ }
+ gst_object_unref (peerpad);
+ gst_object_unref (enc);
+ return res;
+
+error:
+ GST_DEBUG_OBJECT (enc, "query failed");
+ gst_object_unref (peerpad);
+ gst_object_unref (enc);
+ return res;
+}
+
+static GstFlowReturn
+gst_base_video_encoder_chain (GstPad * pad, GstBuffer * buf)
+{
+ GstBaseVideoEncoder *base_video_encoder;
+ GstBaseVideoEncoderClass *klass;
+ GstVideoFrame *frame;
+ GstFlowReturn ret = GST_FLOW_OK;
+
+ base_video_encoder = GST_BASE_VIDEO_ENCODER (gst_pad_get_parent (pad));
+ klass = GST_BASE_VIDEO_ENCODER_GET_CLASS (base_video_encoder);
+
+ g_return_val_if_fail (klass->handle_frame != NULL, GST_FLOW_ERROR);
+
+ if (!GST_PAD_CAPS (pad)) {
+ return GST_FLOW_NOT_NEGOTIATED;
+ }
+
+ GST_LOG_OBJECT (base_video_encoder,
+ "received buffer of size %d with ts %" GST_TIME_FORMAT
+ ", duration %" GST_TIME_FORMAT, GST_BUFFER_SIZE (buf),
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
+ GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
+
+ if (base_video_encoder->a.at_eos) {
+ return GST_FLOW_UNEXPECTED;
+ }
+
+ if (base_video_encoder->sink_clipping) {
+ gint64 start = GST_BUFFER_TIMESTAMP (buf);
+ gint64 stop = start + GST_BUFFER_DURATION (buf);
+ gint64 clip_start;
+ gint64 clip_stop;
+
+ if (!gst_segment_clip (&GST_BASE_VIDEO_CODEC (base_video_encoder)->segment,
+ GST_FORMAT_TIME, start, stop, &clip_start, &clip_stop)) {
+ GST_DEBUG_OBJECT (base_video_encoder,
+ "clipping to segment dropped frame");
+ goto done;
+ }
+ }
+
+ if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DISCONT))) {
+ GST_LOG_OBJECT (base_video_encoder, "marked discont");
+ GST_BASE_VIDEO_CODEC (base_video_encoder)->discont = TRUE;
+ }
+
+ frame =
+ gst_base_video_codec_new_frame (GST_BASE_VIDEO_CODEC
+ (base_video_encoder));
+ frame->sink_buffer = buf;
+ frame->presentation_timestamp = GST_BUFFER_TIMESTAMP (buf);
+ frame->presentation_duration = GST_BUFFER_DURATION (buf);
+ frame->presentation_frame_number =
+ base_video_encoder->presentation_frame_number;
+ base_video_encoder->presentation_frame_number++;
+ frame->force_keyframe = base_video_encoder->force_keyframe;
+ base_video_encoder->force_keyframe = FALSE;
+
+ GST_BASE_VIDEO_CODEC (base_video_encoder)->frames =
+ g_list_append (GST_BASE_VIDEO_CODEC (base_video_encoder)->frames, frame);
+
+ /* new data, more finish needed */
+ base_video_encoder->drained = FALSE;
+
+ GST_LOG_OBJECT (base_video_encoder, "passing frame pfn %d to subclass",
+ frame->presentation_frame_number);
+
+ ret = klass->handle_frame (base_video_encoder, frame);
+
+done:
+ g_object_unref (base_video_encoder);
+
+ return ret;
+}
+
+static GstStateChangeReturn
+gst_base_video_encoder_change_state (GstElement * element,
+ GstStateChange transition)
+{
+ GstBaseVideoEncoder *base_video_encoder;
+ GstBaseVideoEncoderClass *base_video_encoder_class;
+ GstStateChangeReturn ret;
+
+ base_video_encoder = GST_BASE_VIDEO_ENCODER (element);
+ base_video_encoder_class = GST_BASE_VIDEO_ENCODER_GET_CLASS (element);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_READY_TO_PAUSED:
+ gst_base_video_encoder_reset (base_video_encoder);
+ gst_base_video_encoder_reset (base_video_encoder);
+ if (base_video_encoder_class->start) {
+ base_video_encoder_class->start (base_video_encoder);
+ }
+ break;
+ default:
+ break;
+ }
+
+ ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ gst_base_video_encoder_reset (base_video_encoder);
+ if (base_video_encoder_class->stop) {
+ base_video_encoder_class->stop (base_video_encoder);
+ }
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+/**
+ * gst_base_video_encoder_finish_frame:
+ * @base_video_encoder: a #GstBaseVideoEncoder
+ * @frame: an encoded #GstVideoFrame
+ *
+ * @frame must have a valid encoded data buffer, whose metadata fields
+ * are then appropriately set according to frame data.
+ * It is subsequently pushed downstream or provided to @shape_output.
+ * In any case, the frame is considered finished and released.
+ *
+ * Returns: a #GstFlowReturn resulting from sending data downstream
+ */
+GstFlowReturn
+gst_base_video_encoder_finish_frame (GstBaseVideoEncoder * base_video_encoder,
+ GstVideoFrame * frame)
+{
+ GstFlowReturn ret;
+ GstBaseVideoEncoderClass *base_video_encoder_class;
+
+ g_return_val_if_fail (frame->src_buffer != NULL, GST_FLOW_ERROR);
+
+ base_video_encoder_class =
+ GST_BASE_VIDEO_ENCODER_GET_CLASS (base_video_encoder);
+
+ GST_LOG_OBJECT (base_video_encoder,
+ "finish frame fpn %d", frame->presentation_frame_number);
+
+ if (frame->is_sync_point) {
+ GST_LOG_OBJECT (base_video_encoder, "key frame");
+ base_video_encoder->distance_from_sync = 0;
+ GST_BUFFER_FLAG_UNSET (frame->src_buffer, GST_BUFFER_FLAG_DELTA_UNIT);
+ } else {
+ GST_BUFFER_FLAG_SET (frame->src_buffer, GST_BUFFER_FLAG_DELTA_UNIT);
+ }
+
+ frame->distance_from_sync = base_video_encoder->distance_from_sync;
+ base_video_encoder->distance_from_sync++;
+
+ frame->decode_frame_number = frame->system_frame_number - 1;
+ if (frame->decode_frame_number < 0) {
+ frame->decode_timestamp = 0;
+ } else {
+ frame->decode_timestamp = gst_util_uint64_scale (frame->decode_frame_number,
+ GST_SECOND * GST_BASE_VIDEO_CODEC (base_video_encoder)->state.fps_d,
+ GST_BASE_VIDEO_CODEC (base_video_encoder)->state.fps_n);
+ }
+
+ GST_BUFFER_TIMESTAMP (frame->src_buffer) = frame->presentation_timestamp;
+ GST_BUFFER_DURATION (frame->src_buffer) = frame->presentation_duration;
+ GST_BUFFER_OFFSET (frame->src_buffer) = frame->decode_timestamp;
+
+ /* update rate estimate */
+ GST_BASE_VIDEO_CODEC (base_video_encoder)->bytes +=
+ GST_BUFFER_SIZE (frame->src_buffer);
+ if (GST_CLOCK_TIME_IS_VALID (frame->presentation_duration)) {
+ GST_BASE_VIDEO_CODEC (base_video_encoder)->time +=
+ frame->presentation_duration;
+ } else {
+ /* better none than nothing valid */
+ GST_BASE_VIDEO_CODEC (base_video_encoder)->time = GST_CLOCK_TIME_NONE;
+ }
+
+ if (G_UNLIKELY (GST_BASE_VIDEO_CODEC (base_video_encoder)->discont)) {
+ GST_LOG_OBJECT (base_video_encoder, "marking discont");
+ GST_BUFFER_FLAG_SET (frame->src_buffer, GST_BUFFER_FLAG_DISCONT);
+ GST_BASE_VIDEO_CODEC (base_video_encoder)->discont = FALSE;
+ }
+
+ GST_BASE_VIDEO_CODEC (base_video_encoder)->frames =
+ g_list_remove (GST_BASE_VIDEO_CODEC (base_video_encoder)->frames, frame);
+
+ /* FIXME get rid of this ?
+ * seems a roundabout way that adds little benefit to simply get
+ * and subsequently set. subclass is adult enough to set_caps itself ...
+ * so simply check/ensure/assert that src pad caps are set by now */
+ if (!base_video_encoder->set_output_caps) {
+ GstCaps *caps;
+
+ if (base_video_encoder_class->get_caps) {
+ caps = base_video_encoder_class->get_caps (base_video_encoder);
+ } else {
+ caps = gst_caps_new_simple ("video/unknown", NULL);
+ }
+ GST_DEBUG_OBJECT (base_video_encoder, "src caps %" GST_PTR_FORMAT, caps);
+ gst_pad_set_caps (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_encoder), caps);
+ gst_caps_unref (caps);
+ base_video_encoder->set_output_caps = TRUE;
+ }
+
+ gst_buffer_set_caps (GST_BUFFER (frame->src_buffer),
+ GST_PAD_CAPS (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_encoder)));
+
+ if (frame->force_keyframe) {
+ GstClockTime stream_time;
+ GstClockTime running_time;
+ GstEvent *ev;
+
+ running_time =
+ gst_segment_to_running_time (&GST_BASE_VIDEO_CODEC
+ (base_video_encoder)->segment, GST_FORMAT_TIME,
+ frame->presentation_timestamp);
+ stream_time =
+ gst_segment_to_stream_time (&GST_BASE_VIDEO_CODEC
+ (base_video_encoder)->segment, GST_FORMAT_TIME,
+ frame->presentation_timestamp);
+
+ /* re-use upstream event if any so it also conveys any additional
+ * info upstream arranged in there */
+ GST_OBJECT_LOCK (base_video_encoder);
+ if (base_video_encoder->force_keyunit_event) {
+ ev = base_video_encoder->force_keyunit_event;
+ base_video_encoder->force_keyunit_event = NULL;
+ } else {
+ ev = gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM,
+ gst_structure_new ("GstForceKeyUnit", NULL));
+ }
+ GST_OBJECT_UNLOCK (base_video_encoder);
+
+ gst_structure_set (ev->structure,
+ "timestamp", G_TYPE_UINT64, frame->presentation_timestamp,
+ "stream-time", G_TYPE_UINT64, stream_time,
+ "running-time", G_TYPE_UINT64, running_time, NULL);
+
+ gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_encoder), ev);
+ }
+
+ if (base_video_encoder_class->shape_output) {
+ ret = base_video_encoder_class->shape_output (base_video_encoder, frame);
+ } else {
+ ret =
+ gst_pad_push (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_encoder),
+ frame->src_buffer);
+ }
+
+ /* handed out */
+ frame->src_buffer = NULL;
+ gst_base_video_codec_free_frame (frame);
+
+ return ret;
+}
+
+/**
+ * gst_base_video_encoder_get_state:
+ * @base_video_encoder: a #GstBaseVideoEncoder
+ *
+ * Returns: #GstVideoState describing format of video data.
+ */
+const GstVideoState *
+gst_base_video_encoder_get_state (GstBaseVideoEncoder * base_video_encoder)
+{
+ return &GST_BASE_VIDEO_CODEC (base_video_encoder)->state;
+}
+
+/**
+ * gst_base_video_encoder_set_latency:
+ * @base_video_encoder: a #GstBaseVideoEncoder
+ * @min_latency: minimum latency
+ * @max_latency: maximum latency
+ *
+ * Informs baseclass of encoding latency.
+ */
+void
+gst_base_video_encoder_set_latency (GstBaseVideoEncoder * base_video_encoder,
+ GstClockTime min_latency, GstClockTime max_latency)
+{
+ g_return_if_fail (min_latency >= 0);
+ g_return_if_fail (max_latency >= min_latency);
+
+ GST_OBJECT_LOCK (base_video_encoder);
+ base_video_encoder->min_latency = min_latency;
+ base_video_encoder->max_latency = max_latency;
+ GST_OBJECT_UNLOCK (base_video_encoder);
+
+ gst_element_post_message (GST_ELEMENT_CAST (base_video_encoder),
+ gst_message_new_latency (GST_OBJECT_CAST (base_video_encoder)));
+}
+
+/**
+ * gst_base_video_encoder_set_latency_fields:
+ * @base_video_encoder: a #GstBaseVideoEncoder
+ * @fields: latency in fields
+ *
+ * Informs baseclass of encoding latency in terms of fields (both min
+ * and max latency).
+ */
+void
+gst_base_video_encoder_set_latency_fields (GstBaseVideoEncoder *
+ base_video_encoder, int n_fields)
+{
+ gint64 latency;
+
+ latency = gst_util_uint64_scale (n_fields,
+ GST_BASE_VIDEO_CODEC (base_video_encoder)->state.fps_d * GST_SECOND,
+ 2 * GST_BASE_VIDEO_CODEC (base_video_encoder)->state.fps_n);
+
+ gst_base_video_encoder_set_latency (base_video_encoder, latency, latency);
+
+}
+
+/**
+ * gst_base_video_encoder_get_oldest_frame:
+ * @base_video_encoder: a #GstBaseVideoEncoder
+ *
+ * Returns: oldest unfinished pending #GstVideoFrame
+ */
+GstVideoFrame *
+gst_base_video_encoder_get_oldest_frame (GstBaseVideoEncoder *
+ base_video_encoder)
+{
+ GList *g;
+
+ g = g_list_first (GST_BASE_VIDEO_CODEC (base_video_encoder)->frames);
+
+ if (g == NULL)
+ return NULL;
+ return (GstVideoFrame *) (g->data);
+}
+
+/* FIXME there could probably be more of these;
+ * get by presentation_number, by presentation_time ? */
projects / platform / upstream / gst-omx.git / commitdiff