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dc494d9edb
vtenc has an async output queue, which we only iterate over after another frame is enqueued. At the very least it means we're always a frame behind the fastest possible output. In edge cases it's also bug-prone - for example if we only have 1 frame, the downstream caps negotiation will never happen. This commit adds a separate task running on the source pad, which only iterates over the output queue and pushes frames out as soon as they're put there. The queue length is limited to ensure we don't encode too far ahead compared to what downstream can consume. Any failures that occur when pushing data downstream will be signalled in self->downstream_ret so that other parts of code can act accordingly. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4967>
101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/*
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* Copyright (C) 2010 Ole André Vadla Ravnås <oleavr@soundrop.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_VTENC_H__
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#define __GST_VTENC_H__
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#include <gst/gst.h>
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#include <gst/base/gstqueuearray.h>
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#include <gst/codecparsers/gsth264parser.h>
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#include <gst/video/video.h>
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#include <VideoToolbox/VideoToolbox.h>
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G_BEGIN_DECLS
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#define GST_VTENC_CAST(obj) \
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((GstVTEnc *) (obj))
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#define GST_VTENC_CLASS_GET_CODEC_DETAILS(klass) \
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((const GstVTEncoderDetails *) g_type_get_qdata (G_OBJECT_CLASS_TYPE (klass), \
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GST_VTENC_CODEC_DETAILS_QDATA))
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typedef struct _GstVTEncoderDetails GstVTEncoderDetails;
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typedef struct _GstVTEncClassParams GstVTEncClassParams;
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typedef struct _GstVTEncClass GstVTEncClass;
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typedef struct _GstVTEnc GstVTEnc;
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struct _GstVTEncoderDetails
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{
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const gchar * name;
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const gchar * element_name;
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const gchar * mimetype;
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CMVideoCodecType format_id;
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gboolean require_hardware;
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};
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struct _GstVTEncClass
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{
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GstVideoEncoderClass parent_class;
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};
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struct _GstVTEnc
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{
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GstVideoEncoder parent;
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const GstVTEncoderDetails * details;
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CMVideoCodecType specific_format_id;
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CFStringRef profile_level;
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GstH264Profile h264_profile;
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guint bitrate;
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gboolean allow_frame_reordering;
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gboolean realtime;
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gdouble quality;
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gint max_keyframe_interval;
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GstClockTime max_keyframe_interval_duration;
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gint latency_frames;
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gboolean preserve_alpha;
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gboolean dump_properties;
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gboolean dump_attributes;
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gboolean have_field_order;
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GstVideoCodecState *input_state;
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GstVideoInfo video_info;
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VTCompressionSessionRef session;
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CFDictionaryRef keyframe_props;
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GstClockTime dts_offset;
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GstQueueArray * output_queue;
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/* Protects output_queue, is_flushing and pause_task */
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GMutex queue_mutex;
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GCond queue_cond;
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/* downstream_ret is protected by the STREAM_LOCK */
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GstFlowReturn downstream_ret;
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gboolean negotiate_downstream;
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gboolean is_flushing;
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gboolean pause_task;
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};
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void gst_vtenc_register_elements (GstPlugin * plugin);
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G_END_DECLS
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#endif /* __GST_VTENC_H__ */
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