/* GStreamer * Copyright (C) 2008 David Schleef * Copyright (C) 2011 Mark Nauwelaerts . * Copyright (C) 2011 Nokia Corporation. All rights reserved. * Contact: Stefan Kost * * 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. * * * Configuration * * Initially, GstBaseVideoDecoder calls @start when the decoder element * is activated, which allows subclass to perform any global setup. * * * 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. * * * GstBaseVideoDecoder calls @stop at end of all processing. * * * * * * Data processing * * Base class gathers input data, and optionally allows subclass * to parse this into subsequently manageable chunks, typically * corresponding to and referred to as 'frames'. * * * Input frame is provided to subclass' @handle_frame. * * * If codec processing results in decoded data, subclass should call * @gst_base_video_decoder_finish_frame to have decoded data pushed * downstream. * * * * * Shutdown phase * * GstBaseVideoDecoder class calls @stop to inform the subclass that data * parsing will be stopped. * * * * * * 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: * * Provide pad templates * * Set source pad caps when appropriate * * * Configure some baseclass behaviour parameters. * * * 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. * * * Accept data in @handle_frame and provide decoded results to * @gst_base_video_decoder_finish_frame. * * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif /* FIXME 0.11: suppress warnings for deprecated API such as GStaticRecMutex * with newer GLib versions (>= 2.31.0) */ #define GLIB_DISABLE_DEPRECATION_WARNINGS #include "gstbasevideodecoder.h" #include "gstbasevideoutils.h" #include 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_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); } 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_push_src_event (GstBaseVideoDecoder * decoder, GstEvent * event) { /* Forward non-serialized events and EOS/FLUSH_STOP immediately. * For EOS this is required because no buffer or serialized event * will come after EOS and nothing could trigger another * _finish_frame() call. * * If the subclass handles sending of EOS manually it can return * _DROPPED from ::finish() and all other subclasses should have * decoded/flushed all remaining data before this * * For FLUSH_STOP this is required because it is expected * to be forwarded immediately and no buffers are queued anyway. */ if (!GST_EVENT_IS_SERIALIZED (event) || GST_EVENT_TYPE (event) == GST_EVENT_EOS || GST_EVENT_TYPE (event) == GST_EVENT_FLUSH_STOP) return gst_pad_push_event (decoder->base_video_codec.srcpad, event); GST_BASE_VIDEO_CODEC_STREAM_LOCK (decoder); decoder->current_frame_events = g_list_prepend (decoder->current_frame_events, event); GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (decoder); return 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); GST_BASE_VIDEO_CODEC_STREAM_LOCK (base_video_decoder); memset (&state, 0, sizeof (state)); state.caps = gst_caps_ref (caps); 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_BUFFER (gst_value_dup_mini_object (codec_data)); } if (base_video_decoder_class->set_format) { ret = base_video_decoder_class->set_format (base_video_decoder, &state); } if (ret) { gst_buffer_replace (&GST_BASE_VIDEO_CODEC (base_video_decoder)-> state.codec_data, NULL); gst_caps_replace (&GST_BASE_VIDEO_CODEC (base_video_decoder)->state.caps, NULL); GST_BASE_VIDEO_CODEC (base_video_decoder)->state = state; } else { gst_buffer_replace (&state.codec_data, NULL); gst_caps_replace (&state.caps, NULL); } GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_decoder); 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); /* Inform subclass */ /* FIXME ? only if hard, or tell it if hard ? */ if (klass->reset) klass->reset (dec); /* 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; g_list_foreach (dec->current_frame_events, (GFunc) gst_event_unref, NULL); g_list_free (dec->current_frame_events); dec->current_frame_events = NULL; } /* and get (re)set for the sequel */ gst_base_video_decoder_reset (dec, FALSE); 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: { GstFlowReturn flow_ret; GST_BASE_VIDEO_CODEC_STREAM_LOCK (base_video_decoder); if (!base_video_decoder->packetized) { 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) { flow_ret = base_video_decoder_class->finish (base_video_decoder); } else { flow_ret = GST_FLOW_OK; } if (flow_ret == GST_FLOW_OK) ret = gst_base_video_decoder_push_src_event (base_video_decoder, event); GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_decoder); 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_BASE_VIDEO_CODEC_STREAM_LOCK (base_video_decoder); 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 { GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_decoder); 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_base_video_decoder_push_src_event (base_video_decoder, event); GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_decoder); break; } case GST_EVENT_FLUSH_STOP: { GST_BASE_VIDEO_CODEC_STREAM_LOCK (base_video_decoder); /* well, this is kind of worse than a DISCONT */ gst_base_video_decoder_flush (base_video_decoder, TRUE); GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_decoder); } default: /* FIXME this changes the order of events */ ret = gst_base_video_decoder_push_src_event (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_video_frame_unref, 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->parse = NULL; g_list_foreach (dec->parse_gather, (GFunc) gst_video_frame_unref, NULL); g_list_free (dec->parse_gather); dec->parse_gather = NULL; g_list_foreach (GST_BASE_VIDEO_CODEC (dec)->frames, (GFunc) gst_video_frame_unref, NULL); g_list_free (GST_BASE_VIDEO_CODEC (dec)->frames); GST_BASE_VIDEO_CODEC (dec)->frames = NULL; } static void gst_base_video_decoder_reset (GstBaseVideoDecoder * base_video_decoder, gboolean full) { GST_DEBUG_OBJECT (base_video_decoder, "reset full %d", full); GST_BASE_VIDEO_CODEC_STREAM_LOCK (base_video_decoder); 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_video_frame_unref (base_video_decoder->current_frame); base_video_decoder->current_frame = NULL; } base_video_decoder->dropped = 0; base_video_decoder->processed = 0; 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); GST_BASE_VIDEO_CODEC_STREAM_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_video_frame_unref (dec->current_frame); dec->current_frame = frame; gst_video_frame_ref (dec->current_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; GstFlowReturn ret = GST_FLOW_OK; 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)); GST_BASE_VIDEO_CODEC_STREAM_LOCK (base_video_decoder); /* 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_base_video_decoder_push_src_event (base_video_decoder, event); if (!ret) { GST_ERROR_OBJECT (base_video_decoder, "new segment event ret=%d", ret); ret = GST_FLOW_ERROR; goto done; } } 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"); /* track present position */ ts = base_video_decoder->timestamp_offset; index = base_video_decoder->field_index; gst_base_video_decoder_flush (base_video_decoder, FALSE); /* 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) ret = gst_base_video_decoder_chain_forward (base_video_decoder, buf); else ret = gst_base_video_decoder_chain_reverse (base_video_decoder, buf); done: GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_decoder); return ret; } 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_CODEC_STREAM_LOCK (base_video_decoder); gst_base_video_decoder_reset (base_video_decoder, TRUE); g_list_foreach (base_video_decoder->current_frame_events, (GFunc) gst_event_unref, NULL); g_list_free (base_video_decoder->current_frame_events); base_video_decoder->current_frame_events = NULL; GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_decoder); break; default: break; } return ret; } static GstVideoFrame * gst_base_video_decoder_new_frame (GstBaseVideoDecoder * base_video_decoder) { GstVideoFrame *frame; GST_BASE_VIDEO_CODEC_STREAM_LOCK (base_video_decoder); frame = gst_base_video_codec_new_frame (GST_BASE_VIDEO_CODEC (base_video_decoder)); 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; frame->events = base_video_decoder->current_frame_events; base_video_decoder->current_frame_events = NULL; GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_decoder); return frame; } static void gst_base_video_decoder_prepare_finish_frame (GstBaseVideoDecoder * base_video_decoder, GstVideoFrame * frame) { GList *l, *events = NULL; #ifndef GST_DISABLE_GST_DEBUG 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)); #endif GST_LOG_OBJECT (base_video_decoder, "finish frame sync=%d pts=%" GST_TIME_FORMAT, frame->is_sync_point, GST_TIME_ARGS (frame->presentation_timestamp)); /* Push all pending events that arrived before this frame */ for (l = base_video_decoder->base_video_codec.frames; l; l = l->next) { GstVideoFrame *tmp = l->data; if (tmp->events) { events = tmp->events; tmp->events = NULL; } if (tmp == frame) break; } for (l = g_list_last (events); l; l = l->prev) { GST_LOG_OBJECT (base_video_decoder, "pushing %s event", GST_EVENT_TYPE_NAME (l->data)); gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder), l->data); } g_list_free (events); /* Check if the data should not be displayed. For example altref/invisible * frame in vp8. In this case we should not update the timestamps. */ if (frame->decode_only) return; 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; } static void gst_base_video_decoder_do_finish_frame (GstBaseVideoDecoder * dec, GstVideoFrame * frame) { GST_BASE_VIDEO_CODEC (dec)->frames = g_list_remove (GST_BASE_VIDEO_CODEC (dec)->frames, frame); gst_video_frame_unref (frame); } /** * gst_base_video_decoder_drop_frame: * @dec: a #GstBaseVideoDecoder * @frame: the #GstVideoFrame to drop * * Similar to gst_base_video_decoder_finish_frame(), but drops @frame in any * case and posts a QoS message with the frame's details on the bus. * In any case, the frame is considered finished and released. * * Returns: a #GstFlowReturn, usually GST_FLOW_OK. * * Since: 0.10.23 */ GstFlowReturn gst_base_video_decoder_drop_frame (GstBaseVideoDecoder * dec, GstVideoFrame * frame) { GstClockTime stream_time, jitter, earliest_time, qostime, timestamp; GstSegment *segment; GstMessage *qos_msg; gdouble proportion; GST_LOG_OBJECT (dec, "drop frame"); GST_BASE_VIDEO_CODEC_STREAM_LOCK (dec); gst_base_video_decoder_prepare_finish_frame (dec, frame); GST_DEBUG_OBJECT (dec, "dropping frame %" GST_TIME_FORMAT, GST_TIME_ARGS (frame->presentation_timestamp)); dec->dropped++; /* post QoS message */ timestamp = frame->presentation_timestamp; proportion = GST_BASE_VIDEO_CODEC (dec)->proportion; segment = &GST_BASE_VIDEO_CODEC (dec)->segment; stream_time = gst_segment_to_stream_time (segment, GST_FORMAT_TIME, timestamp); qostime = gst_segment_to_running_time (segment, GST_FORMAT_TIME, timestamp); earliest_time = GST_BASE_VIDEO_CODEC (dec)->earliest_time; jitter = GST_CLOCK_DIFF (qostime, earliest_time); qos_msg = gst_message_new_qos (GST_OBJECT_CAST (dec), FALSE, qostime, stream_time, timestamp, GST_CLOCK_TIME_NONE); gst_message_set_qos_values (qos_msg, jitter, proportion, 1000000); gst_message_set_qos_stats (qos_msg, GST_FORMAT_BUFFERS, dec->processed, dec->dropped); gst_element_post_message (GST_ELEMENT_CAST (dec), qos_msg); /* now free the frame */ gst_base_video_decoder_do_finish_frame (dec, frame); GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (dec); return GST_FLOW_OK; } /** * 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_BASE_VIDEO_CODEC_STREAM_LOCK (base_video_decoder); gst_base_video_decoder_prepare_finish_frame (base_video_decoder, frame); base_video_decoder->processed++; /* no buffer data means this frame is skipped */ if (!frame->src_buffer || frame->decode_only) { 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); ret = GST_FLOW_OK; goto done; } } /* 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_decoder_do_finish_frame (base_video_decoder, frame); GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_decoder); 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; GST_BASE_VIDEO_CODEC_STREAM_LOCK (base_video_decoder); 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); GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_decoder); } 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; GstFlowReturn ret = GST_FLOW_OK; GST_LOG_OBJECT (base_video_decoder, "have_frame"); GST_BASE_VIDEO_CODEC_STREAM_LOCK (base_video_decoder); 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)); ret = gst_base_video_decoder_have_frame_2 (base_video_decoder); GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_decoder); return ret; } 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: /* current frame has either been added to parse_gather or sent to handle frame so there is no need to unref it */ /* 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"); GST_BASE_VIDEO_CODEC_STREAM_LOCK (base_video_decoder); 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; GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_decoder); } /* 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"); GST_BASE_VIDEO_CODEC_STREAM_LOCK (base_video_decoder); base_video_decoder->current_frame->is_sync_point = TRUE; base_video_decoder->distance_from_sync = 0; GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_decoder); } /** * 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; GST_BASE_VIDEO_CODEC_STREAM_LOCK (base_video_decoder); g = g_list_first (GST_BASE_VIDEO_CODEC (base_video_decoder)->frames); GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_decoder); 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; GstVideoFrame *frame = NULL; GST_BASE_VIDEO_CODEC_STREAM_LOCK (base_video_decoder); for (g = g_list_first (GST_BASE_VIDEO_CODEC (base_video_decoder)->frames); g; g = g_list_next (g)) { GstVideoFrame *tmp = g->data; if (frame->system_frame_number == frame_number) { frame = tmp; break; } } GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_decoder); return frame; } /** * 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); GST_BASE_VIDEO_CODEC_STREAM_LOCK (base_video_decoder); /* 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); GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_decoder); 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; GstVideoState *state = &GST_BASE_VIDEO_CODEC (base_video_decoder)->state; int num_bytes = state->bytes_per_picture; GST_DEBUG ("alloc src buffer caps=%" GST_PTR_FORMAT, GST_PAD_CAPS (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_decoder))); GST_BASE_VIDEO_CODEC_STREAM_LOCK (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))); } GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (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); GST_BASE_VIDEO_CODEC_STREAM_LOCK (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)), &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)); } GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_decoder); 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 events). * 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; GST_OBJECT_LOCK (base_video_decoder); 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)); GST_OBJECT_UNLOCK (base_video_decoder); 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; } }