2 * Copyright (C) 2008 David Schleef <ds@schleef.org>
3 * Copyright (C) 2011 Mark Nauwelaerts <mark.nauwelaerts@collabora.co.uk>.
4 * Copyright (C) 2011 Nokia Corporation. All rights reserved.
5 * Contact: Stefan Kost <stefan.kost@nokia.com>
6 * Copyright (C) 2012 Collabora Ltd.
7 * Author : Edward Hervey <edward@collabora.com>
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Library General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Library General Public License for more details.
19 * You should have received a copy of the GNU Library General Public
20 * License along with this library; if not, write to the
21 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 * Boston, MA 02111-1307, USA.
26 * SECTION:gstvideoencoder
27 * @short_description: Base class for video encoders
30 * This base class is for video encoders turning raw video into
33 * GstVideoEncoder and subclass should cooperate as follows.
36 * <itemizedlist><title>Configuration</title>
38 * Initially, GstVideoEncoder calls @start when the encoder element
39 * is activated, which allows subclass to perform any global setup.
42 * GstVideoEncoder calls @set_format to inform subclass of the format
43 * of input video data that it is about to receive. Subclass should
44 * setup for encoding and configure base class as appropriate
45 * (e.g. latency). While unlikely, it might be called more than once,
46 * if changing input parameters require reconfiguration. Baseclass
47 * will ensure that processing of current configuration is finished.
50 * GstVideoEncoder calls @stop at end of all processing.
56 * <title>Data processing</title>
58 * Base class collects input data and metadata into a frame and hands
59 * this to subclass' @handle_frame.
62 * If codec processing results in encoded data, subclass should call
63 * @gst_video_encoder_finish_frame to have encoded data pushed
67 * If implemented, baseclass calls subclass @pre_push just prior to
68 * pushing to allow subclasses to modify some metadata on the buffer.
69 * If it returns GST_FLOW_OK, the buffer is pushed downstream.
72 * GstVideoEncoderClass will handle both srcpad and sinkpad events.
73 * Sink events will be passed to subclass if @event callback has been
79 * <itemizedlist><title>Shutdown phase</title>
81 * GstVideoEncoder class calls @stop to inform the subclass that data
82 * parsing will be stopped.
88 * Subclass is responsible for providing pad template caps for
89 * source and sink pads. The pads need to be named "sink" and "src". It should
90 * also be able to provide fixed src pad caps in @getcaps by the time it calls
91 * @gst_video_encoder_finish_frame.
93 * Things that subclass need to take care of:
95 * <listitem><para>Provide pad templates</para></listitem>
97 * Provide source pad caps before pushing the first buffer
100 * Accept data in @handle_frame and provide encoded results to
101 * @gst_video_encoder_finish_frame.
113 * * Change _set_output_format() to steal the reference of the provided caps
114 * * Calculate actual latency based on input/output timestamp/frame_number
115 * and if it exceeds the recorded one, save it and emit a GST_MESSAGE_LATENCY
118 /* FIXME 0.11: suppress warnings for deprecated API such as GStaticRecMutex
119 * with newer GLib versions (>= 2.31.0) */
120 #define GLIB_DISABLE_DEPRECATION_WARNINGS
122 #include "gstvideoencoder.h"
123 #include "gstvideoutils.h"
125 #include <gst/video/gstvideometa.h>
129 GST_DEBUG_CATEGORY (videoencoder_debug);
130 #define GST_CAT_DEFAULT videoencoder_debug
132 #define GST_VIDEO_ENCODER_GET_PRIVATE(obj) \
133 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_VIDEO_ENCODER, \
134 GstVideoEncoderPrivate))
136 struct _GstVideoEncoderPrivate
138 guint64 presentation_frame_number;
139 int distance_from_sync;
141 /* FIXME : (and introduce a context ?) */
148 GList *current_frame_events;
151 gboolean new_headers; /* Whether new headers were just set */
153 GList *force_key_unit; /* List of pending forced keyunits */
155 guint64 system_frame_number;
157 GList *frames; /* Protected with OBJECT_LOCK */
158 GstVideoCodecState *input_state;
159 GstVideoCodecState *output_state;
160 gboolean output_state_changed;
165 GstAllocator *allocator;
166 GstAllocationParams params;
169 typedef struct _ForcedKeyUnitEvent ForcedKeyUnitEvent;
170 struct _ForcedKeyUnitEvent
172 GstClockTime running_time;
173 gboolean pending; /* TRUE if this was requested already */
174 gboolean all_headers;
179 forced_key_unit_event_free (ForcedKeyUnitEvent * evt)
181 g_slice_free (ForcedKeyUnitEvent, evt);
184 static ForcedKeyUnitEvent *
185 forced_key_unit_event_new (GstClockTime running_time, gboolean all_headers,
188 ForcedKeyUnitEvent *evt = g_slice_new0 (ForcedKeyUnitEvent);
190 evt->running_time = running_time;
191 evt->all_headers = all_headers;
197 static GstElementClass *parent_class = NULL;
198 static void gst_video_encoder_class_init (GstVideoEncoderClass * klass);
199 static void gst_video_encoder_init (GstVideoEncoder * enc,
200 GstVideoEncoderClass * klass);
202 static void gst_video_encoder_finalize (GObject * object);
204 static gboolean gst_video_encoder_setcaps (GstVideoEncoder * enc,
206 static GstCaps *gst_video_encoder_sink_getcaps (GstVideoEncoder * encoder,
208 static gboolean gst_video_encoder_src_event (GstPad * pad, GstObject * parent,
210 static gboolean gst_video_encoder_sink_event (GstPad * pad, GstObject * parent,
212 static GstFlowReturn gst_video_encoder_chain (GstPad * pad, GstObject * parent,
214 static GstStateChangeReturn gst_video_encoder_change_state (GstElement *
215 element, GstStateChange transition);
216 static gboolean gst_video_encoder_sink_query (GstPad * pad, GstObject * parent,
218 static gboolean gst_video_encoder_src_query (GstPad * pad, GstObject * parent,
220 static GstVideoCodecFrame *gst_video_encoder_new_frame (GstVideoEncoder *
221 encoder, GstBuffer * buf, GstClockTime pts, GstClockTime dts,
222 GstClockTime duration);
224 static gboolean gst_video_encoder_sink_event_default (GstVideoEncoder * encoder,
226 static gboolean gst_video_encoder_src_event_default (GstVideoEncoder * encoder,
228 static gboolean gst_video_encoder_decide_allocation_default (GstVideoEncoder *
229 encoder, GstQuery * query);
230 static gboolean gst_video_encoder_propose_allocation_default (GstVideoEncoder *
231 encoder, GstQuery * query);
233 /* we can't use G_DEFINE_ABSTRACT_TYPE because we need the klass in the _init
234 * method to get to the padtemplates */
236 gst_video_encoder_get_type (void)
238 static volatile gsize type = 0;
240 if (g_once_init_enter (&type)) {
242 static const GTypeInfo info = {
243 sizeof (GstVideoEncoderClass),
246 (GClassInitFunc) gst_video_encoder_class_init,
249 sizeof (GstVideoEncoder),
251 (GInstanceInitFunc) gst_video_encoder_init,
253 const GInterfaceInfo preset_interface_info = {
254 NULL, /* interface_init */
255 NULL, /* interface_finalize */
256 NULL /* interface_data */
259 _type = g_type_register_static (GST_TYPE_ELEMENT,
260 "GstVideoEncoder", &info, G_TYPE_FLAG_ABSTRACT);
261 g_type_add_interface_static (_type, GST_TYPE_PRESET,
262 &preset_interface_info);
263 g_once_init_leave (&type, _type);
269 gst_video_encoder_class_init (GstVideoEncoderClass * klass)
271 GObjectClass *gobject_class;
272 GstElementClass *gstelement_class;
274 gobject_class = G_OBJECT_CLASS (klass);
275 gstelement_class = GST_ELEMENT_CLASS (klass);
277 GST_DEBUG_CATEGORY_INIT (videoencoder_debug, "videoencoder", 0,
278 "Base Video Encoder");
280 parent_class = g_type_class_peek_parent (klass);
282 g_type_class_add_private (klass, sizeof (GstVideoEncoderPrivate));
284 gobject_class->finalize = gst_video_encoder_finalize;
286 gstelement_class->change_state =
287 GST_DEBUG_FUNCPTR (gst_video_encoder_change_state);
289 klass->sink_event = gst_video_encoder_sink_event_default;
290 klass->src_event = gst_video_encoder_src_event_default;
291 klass->propose_allocation = gst_video_encoder_propose_allocation_default;
292 klass->decide_allocation = gst_video_encoder_decide_allocation_default;
296 gst_video_encoder_reset (GstVideoEncoder * encoder)
298 GstVideoEncoderPrivate *priv = encoder->priv;
301 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
303 priv->presentation_frame_number = 0;
304 priv->distance_from_sync = 0;
306 g_list_foreach (priv->force_key_unit, (GFunc) forced_key_unit_event_free,
308 g_list_free (priv->force_key_unit);
309 priv->force_key_unit = NULL;
311 priv->drained = TRUE;
312 priv->min_latency = 0;
313 priv->max_latency = 0;
315 g_list_foreach (priv->headers, (GFunc) gst_event_unref, NULL);
316 g_list_free (priv->headers);
317 priv->headers = NULL;
318 priv->new_headers = FALSE;
320 g_list_foreach (priv->current_frame_events, (GFunc) gst_event_unref, NULL);
321 g_list_free (priv->current_frame_events);
322 priv->current_frame_events = NULL;
324 for (g = priv->frames; g; g = g->next) {
325 gst_video_codec_frame_unref ((GstVideoCodecFrame *) g->data);
327 g_list_free (priv->frames);
333 if (priv->input_state)
334 gst_video_codec_state_unref (priv->input_state);
335 priv->input_state = NULL;
336 if (priv->output_state)
337 gst_video_codec_state_unref (priv->output_state);
338 priv->output_state = NULL;
340 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
344 gst_video_encoder_init (GstVideoEncoder * encoder, GstVideoEncoderClass * klass)
346 GstVideoEncoderPrivate *priv;
347 GstPadTemplate *pad_template;
350 GST_DEBUG_OBJECT (encoder, "gst_video_encoder_init");
352 priv = encoder->priv = GST_VIDEO_ENCODER_GET_PRIVATE (encoder);
355 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "sink");
356 g_return_if_fail (pad_template != NULL);
358 encoder->sinkpad = pad = gst_pad_new_from_template (pad_template, "sink");
360 gst_pad_set_chain_function (pad, GST_DEBUG_FUNCPTR (gst_video_encoder_chain));
361 gst_pad_set_event_function (pad,
362 GST_DEBUG_FUNCPTR (gst_video_encoder_sink_event));
363 gst_pad_set_query_function (pad,
364 GST_DEBUG_FUNCPTR (gst_video_encoder_sink_query));
365 gst_element_add_pad (GST_ELEMENT (encoder), encoder->sinkpad);
368 gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "src");
369 g_return_if_fail (pad_template != NULL);
371 encoder->srcpad = pad = gst_pad_new_from_template (pad_template, "src");
373 gst_pad_set_query_function (pad,
374 GST_DEBUG_FUNCPTR (gst_video_encoder_src_query));
375 gst_pad_set_event_function (pad,
376 GST_DEBUG_FUNCPTR (gst_video_encoder_src_event));
377 gst_element_add_pad (GST_ELEMENT (encoder), encoder->srcpad);
379 gst_segment_init (&encoder->input_segment, GST_FORMAT_TIME);
380 gst_segment_init (&encoder->output_segment, GST_FORMAT_TIME);
382 g_rec_mutex_init (&encoder->stream_lock);
384 priv->at_eos = FALSE;
385 priv->headers = NULL;
386 priv->new_headers = FALSE;
388 gst_video_encoder_reset (encoder);
392 gst_video_encoded_video_convert (gint64 bytes, gint64 time,
393 GstFormat src_format, gint64 src_value, GstFormat * dest_format,
396 gboolean res = FALSE;
398 g_return_val_if_fail (dest_format != NULL, FALSE);
399 g_return_val_if_fail (dest_value != NULL, FALSE);
401 if (G_UNLIKELY (src_format == *dest_format || src_value == 0 ||
404 *dest_value = src_value;
408 if (bytes <= 0 || time <= 0) {
409 GST_DEBUG ("not enough metadata yet to convert");
413 switch (src_format) {
414 case GST_FORMAT_BYTES:
415 switch (*dest_format) {
416 case GST_FORMAT_TIME:
417 *dest_value = gst_util_uint64_scale (src_value, time, bytes);
424 case GST_FORMAT_TIME:
425 switch (*dest_format) {
426 case GST_FORMAT_BYTES:
427 *dest_value = gst_util_uint64_scale (src_value, bytes, time);
435 GST_DEBUG ("unhandled conversion from %d to %d", src_format,
445 * gst_video_encoder_set_headers:
446 * @encoder: a #GstVideoEncoder
447 * @headers: (transfer full) (element-type GstBuffer): a list of #GstBuffer containing the codec header
449 * Set the codec headers to be sent downstream whenever requested.
452 gst_video_encoder_set_headers (GstVideoEncoder * video_encoder, GList * headers)
454 GST_VIDEO_ENCODER_STREAM_LOCK (video_encoder);
456 GST_DEBUG_OBJECT (video_encoder, "new headers %p", headers);
457 if (video_encoder->priv->headers) {
458 g_list_foreach (video_encoder->priv->headers, (GFunc) gst_buffer_unref,
460 g_list_free (video_encoder->priv->headers);
462 video_encoder->priv->headers = headers;
463 video_encoder->priv->new_headers = TRUE;
465 GST_VIDEO_ENCODER_STREAM_UNLOCK (video_encoder);
469 gst_video_encoder_drain (GstVideoEncoder * enc)
471 GstVideoEncoderPrivate *priv;
472 GstVideoEncoderClass *enc_class;
475 enc_class = GST_VIDEO_ENCODER_GET_CLASS (enc);
478 GST_DEBUG_OBJECT (enc, "draining");
481 GST_DEBUG_OBJECT (enc, "already drained");
485 if (enc_class->reset) {
486 GST_DEBUG_OBJECT (enc, "requesting subclass to finish");
487 ret = enc_class->reset (enc, TRUE);
489 /* everything should be away now */
491 /* not fatal/impossible though if subclass/enc eats stuff */
492 g_list_foreach (priv->frames, (GFunc) gst_video_codec_frame_unref, NULL);
493 g_list_free (priv->frames);
500 static GstVideoCodecState *
501 _new_output_state (GstCaps * caps, GstVideoCodecState * reference)
503 GstVideoCodecState *state;
505 state = g_slice_new0 (GstVideoCodecState);
506 state->ref_count = 1;
507 gst_video_info_init (&state->info);
508 gst_video_info_set_format (&state->info, GST_VIDEO_FORMAT_ENCODED, 0, 0);
513 GstVideoInfo *tgt, *ref;
516 ref = &reference->info;
518 /* Copy over extra fields from reference state */
519 tgt->interlace_mode = ref->interlace_mode;
520 tgt->flags = ref->flags;
521 tgt->width = ref->width;
522 tgt->height = ref->height;
523 tgt->chroma_site = ref->chroma_site;
524 tgt->colorimetry = ref->colorimetry;
525 tgt->par_n = ref->par_n;
526 tgt->par_d = ref->par_d;
527 tgt->fps_n = ref->fps_n;
528 tgt->fps_d = ref->fps_d;
534 static GstVideoCodecState *
535 _new_input_state (GstCaps * caps)
537 GstVideoCodecState *state;
539 state = g_slice_new0 (GstVideoCodecState);
540 state->ref_count = 1;
541 gst_video_info_init (&state->info);
542 if (G_UNLIKELY (!gst_video_info_from_caps (&state->info, caps)))
544 state->caps = gst_caps_ref (caps);
550 g_slice_free (GstVideoCodecState, state);
556 gst_video_encoder_setcaps (GstVideoEncoder * encoder, GstCaps * caps)
558 GstVideoEncoderClass *encoder_class;
559 GstVideoCodecState *state;
561 gboolean samecaps = FALSE;
563 encoder_class = GST_VIDEO_ENCODER_GET_CLASS (encoder);
565 /* subclass should do something here ... */
566 g_return_val_if_fail (encoder_class->set_format != NULL, FALSE);
568 GST_DEBUG_OBJECT (encoder, "setcaps %" GST_PTR_FORMAT, caps);
570 state = _new_input_state (caps);
571 if (G_UNLIKELY (!state))
574 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
576 if (encoder->priv->input_state)
578 gst_video_info_is_equal (&state->info,
579 &encoder->priv->input_state->info);
582 /* arrange draining pending frames */
583 gst_video_encoder_drain (encoder);
585 /* and subclass should be ready to configure format at any time around */
586 ret = encoder_class->set_format (encoder, state);
588 if (encoder->priv->input_state)
589 gst_video_codec_state_unref (encoder->priv->input_state);
590 encoder->priv->input_state = state;
592 gst_video_codec_state_unref (state);
594 /* no need to stir things up */
595 GST_DEBUG_OBJECT (encoder,
596 "new video format identical to configured format");
597 gst_video_codec_state_unref (state);
601 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
604 GST_WARNING_OBJECT (encoder, "rejected caps %" GST_PTR_FORMAT, caps);
610 GST_WARNING_OBJECT (encoder, "Failed to parse caps");
616 * gst_video_encoder_proxy_getcaps:
617 * @enc: a #GstVideoEncoder
618 * @caps: initial caps
620 * Returns caps that express @caps (or sink template caps if @caps == NULL)
621 * restricted to resolution/format/... combinations supported by downstream
622 * elements (e.g. muxers).
624 * Returns: a #GstCaps owned by caller
627 gst_video_encoder_proxy_getcaps (GstVideoEncoder * encoder, GstCaps * caps,
632 GstCaps *fcaps, *filter_caps;
635 /* Allow downstream to specify width/height/framerate/PAR constraints
636 * and forward them upstream for video converters to handle
639 caps ? gst_caps_ref (caps) :
640 gst_pad_get_pad_template_caps (encoder->sinkpad);
641 allowed = gst_pad_get_allowed_caps (encoder->srcpad);
643 if (!allowed || gst_caps_is_empty (allowed) || gst_caps_is_any (allowed)) {
648 GST_LOG_OBJECT (encoder, "template caps %" GST_PTR_FORMAT, templ_caps);
649 GST_LOG_OBJECT (encoder, "allowed caps %" GST_PTR_FORMAT, allowed);
651 filter_caps = gst_caps_new_empty ();
653 for (i = 0; i < gst_caps_get_size (templ_caps); i++) {
655 gst_structure_get_name_id (gst_caps_get_structure (templ_caps, i));
657 for (j = 0; j < gst_caps_get_size (allowed); j++) {
658 const GstStructure *allowed_s = gst_caps_get_structure (allowed, j);
662 s = gst_structure_new_id_empty (q_name);
663 if ((val = gst_structure_get_value (allowed_s, "width")))
664 gst_structure_set_value (s, "width", val);
665 if ((val = gst_structure_get_value (allowed_s, "height")))
666 gst_structure_set_value (s, "height", val);
667 if ((val = gst_structure_get_value (allowed_s, "framerate")))
668 gst_structure_set_value (s, "framerate", val);
669 if ((val = gst_structure_get_value (allowed_s, "pixel-aspect-ratio")))
670 gst_structure_set_value (s, "pixel-aspect-ratio", val);
672 filter_caps = gst_caps_merge_structure (filter_caps, s);
676 fcaps = gst_caps_intersect (filter_caps, templ_caps);
677 gst_caps_unref (filter_caps);
678 gst_caps_unref (templ_caps);
681 GST_LOG_OBJECT (encoder, "intersecting with %" GST_PTR_FORMAT, filter);
682 filter_caps = gst_caps_intersect (fcaps, filter);
683 gst_caps_unref (fcaps);
688 gst_caps_replace (&allowed, NULL);
690 GST_LOG_OBJECT (encoder, "proxy caps %" GST_PTR_FORMAT, fcaps);
696 gst_video_encoder_sink_getcaps (GstVideoEncoder * encoder, GstCaps * filter)
698 GstVideoEncoderClass *klass;
701 klass = GST_VIDEO_ENCODER_GET_CLASS (encoder);
704 caps = klass->getcaps (encoder, filter);
706 caps = gst_video_encoder_proxy_getcaps (encoder, NULL, filter);
708 GST_LOG_OBJECT (encoder, "Returning caps %" GST_PTR_FORMAT, caps);
714 gst_video_encoder_decide_allocation_default (GstVideoEncoder * encoder,
717 GstAllocator *allocator = NULL;
718 GstAllocationParams params;
719 gboolean update_allocator;
721 /* we got configuration from our peer or the decide_allocation method,
723 if (gst_query_get_n_allocation_params (query) > 0) {
724 /* try the allocator */
725 gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
726 update_allocator = TRUE;
729 gst_allocation_params_init (¶ms);
730 update_allocator = FALSE;
733 if (update_allocator)
734 gst_query_set_nth_allocation_param (query, 0, allocator, ¶ms);
736 gst_query_add_allocation_param (query, allocator, ¶ms);
738 gst_object_unref (allocator);
744 gst_video_encoder_propose_allocation_default (GstVideoEncoder * encoder,
751 gst_video_encoder_sink_query (GstPad * pad, GstObject * parent,
754 GstVideoEncoder *encoder;
755 gboolean res = FALSE;
757 encoder = GST_VIDEO_ENCODER (parent);
759 switch (GST_QUERY_TYPE (query)) {
762 GstCaps *filter, *caps;
764 gst_query_parse_caps (query, &filter);
765 caps = gst_video_encoder_sink_getcaps (encoder, filter);
766 gst_query_set_caps_result (query, caps);
767 gst_caps_unref (caps);
771 case GST_QUERY_ALLOCATION:
773 GstVideoEncoderClass *klass = GST_VIDEO_ENCODER_GET_CLASS (encoder);
775 if (klass->propose_allocation)
776 res = klass->propose_allocation (encoder, query);
780 res = gst_pad_query_default (pad, parent, query);
787 gst_video_encoder_finalize (GObject * object)
789 GstVideoEncoder *encoder;
791 GST_DEBUG_OBJECT (object, "finalize");
793 encoder = GST_VIDEO_ENCODER (object);
794 if (encoder->priv->headers) {
795 g_list_foreach (encoder->priv->headers, (GFunc) gst_buffer_unref, NULL);
796 g_list_free (encoder->priv->headers);
798 g_rec_mutex_clear (&encoder->stream_lock);
800 if (encoder->priv->allocator) {
801 gst_object_unref (encoder->priv->allocator);
802 encoder->priv->allocator = NULL;
805 G_OBJECT_CLASS (parent_class)->finalize (object);
809 gst_video_encoder_push_event (GstVideoEncoder * encoder, GstEvent * event)
811 switch (GST_EVENT_TYPE (event)) {
812 case GST_EVENT_SEGMENT:
816 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
818 gst_event_copy_segment (event, &segment);
820 GST_DEBUG_OBJECT (encoder, "segment %" GST_SEGMENT_FORMAT, &segment);
822 if (segment.format != GST_FORMAT_TIME) {
823 GST_DEBUG_OBJECT (encoder, "received non TIME segment");
824 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
828 encoder->output_segment = segment;
829 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
836 return gst_pad_push_event (encoder->srcpad, event);
840 gst_video_encoder_sink_event_default (GstVideoEncoder * encoder,
843 GstVideoEncoderClass *encoder_class;
844 gboolean ret = FALSE;
846 encoder_class = GST_VIDEO_ENCODER_GET_CLASS (encoder);
848 switch (GST_EVENT_TYPE (event)) {
853 gst_event_parse_caps (event, &caps);
854 ret = gst_video_encoder_setcaps (encoder, caps);
855 gst_event_unref (event);
861 GstFlowReturn flow_ret;
863 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
864 encoder->priv->at_eos = TRUE;
866 if (encoder_class->finish) {
867 flow_ret = encoder_class->finish (encoder);
869 flow_ret = GST_FLOW_OK;
872 ret = (flow_ret == GST_FLOW_OK);
873 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
876 case GST_EVENT_SEGMENT:
880 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
882 gst_event_copy_segment (event, &segment);
884 GST_DEBUG_OBJECT (encoder, "segment %" GST_SEGMENT_FORMAT, &segment);
886 if (segment.format != GST_FORMAT_TIME) {
887 GST_DEBUG_OBJECT (encoder, "received non TIME newsegment");
888 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
892 encoder->priv->at_eos = FALSE;
894 encoder->input_segment = segment;
896 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
899 case GST_EVENT_CUSTOM_DOWNSTREAM:
901 if (gst_video_event_is_force_key_unit (event)) {
902 GstClockTime running_time;
903 gboolean all_headers;
906 if (gst_video_event_parse_downstream_force_key_unit (event,
907 NULL, NULL, &running_time, &all_headers, &count)) {
908 ForcedKeyUnitEvent *fevt;
910 GST_OBJECT_LOCK (encoder);
911 fevt = forced_key_unit_event_new (running_time, all_headers, count);
912 encoder->priv->force_key_unit =
913 g_list_append (encoder->priv->force_key_unit, fevt);
914 GST_OBJECT_UNLOCK (encoder);
916 GST_DEBUG_OBJECT (encoder,
917 "force-key-unit event: running-time %" GST_TIME_FORMAT
918 ", all_headers %d, count %u",
919 GST_TIME_ARGS (running_time), all_headers, count);
921 gst_event_unref (event);
931 /* Forward non-serialized events and EOS/FLUSH_STOP immediately.
932 * For EOS this is required because no buffer or serialized event
933 * will come after EOS and nothing could trigger another
934 * _finish_frame() call. *
935 * If the subclass handles sending of EOS manually it can simply
936 * not chain up to the parent class' event handler
938 * For FLUSH_STOP this is required because it is expected
939 * to be forwarded immediately and no buffers are queued anyway.
942 if (!GST_EVENT_IS_SERIALIZED (event)
943 || GST_EVENT_TYPE (event) == GST_EVENT_EOS
944 || GST_EVENT_TYPE (event) == GST_EVENT_FLUSH_STOP) {
945 ret = gst_video_encoder_push_event (encoder, event);
947 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
948 encoder->priv->current_frame_events =
949 g_list_prepend (encoder->priv->current_frame_events, event);
950 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
959 gst_video_encoder_sink_event (GstPad * pad, GstObject * parent,
962 GstVideoEncoder *enc;
963 GstVideoEncoderClass *klass;
966 enc = GST_VIDEO_ENCODER (parent);
967 klass = GST_VIDEO_ENCODER_GET_CLASS (enc);
969 GST_DEBUG_OBJECT (enc, "received event %d, %s", GST_EVENT_TYPE (event),
970 GST_EVENT_TYPE_NAME (event));
972 if (klass->sink_event)
973 ret = klass->sink_event (enc, event);
979 gst_video_encoder_src_event_default (GstVideoEncoder * encoder,
982 gboolean ret = FALSE;
984 switch (GST_EVENT_TYPE (event)) {
985 case GST_EVENT_CUSTOM_UPSTREAM:
987 if (gst_video_event_is_force_key_unit (event)) {
988 GstClockTime running_time;
989 gboolean all_headers;
992 if (gst_video_event_parse_upstream_force_key_unit (event,
993 &running_time, &all_headers, &count)) {
994 ForcedKeyUnitEvent *fevt;
996 GST_OBJECT_LOCK (encoder);
997 fevt = forced_key_unit_event_new (running_time, all_headers, count);
998 encoder->priv->force_key_unit =
999 g_list_append (encoder->priv->force_key_unit, fevt);
1000 GST_OBJECT_UNLOCK (encoder);
1002 GST_DEBUG_OBJECT (encoder,
1003 "force-key-unit event: running-time %" GST_TIME_FORMAT
1004 ", all_headers %d, count %u",
1005 GST_TIME_ARGS (running_time), all_headers, count);
1007 gst_event_unref (event);
1019 gst_pad_event_default (encoder->srcpad, GST_OBJECT_CAST (encoder),
1026 gst_video_encoder_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1028 GstVideoEncoder *encoder;
1029 GstVideoEncoderClass *klass;
1030 gboolean ret = FALSE;
1032 encoder = GST_VIDEO_ENCODER (parent);
1033 klass = GST_VIDEO_ENCODER_GET_CLASS (encoder);
1035 GST_LOG_OBJECT (encoder, "handling event: %" GST_PTR_FORMAT, event);
1037 if (klass->src_event)
1038 ret = klass->src_event (encoder, event);
1044 gst_video_encoder_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
1046 GstVideoEncoderPrivate *priv;
1047 GstVideoEncoder *enc;
1050 enc = GST_VIDEO_ENCODER (parent);
1053 GST_LOG_OBJECT (enc, "handling query: %" GST_PTR_FORMAT, query);
1055 switch (GST_QUERY_TYPE (query)) {
1056 case GST_QUERY_CONVERT:
1058 GstFormat src_fmt, dest_fmt;
1059 gint64 src_val, dest_val;
1061 gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
1063 gst_video_encoded_video_convert (priv->bytes, priv->time, src_fmt,
1064 src_val, &dest_fmt, &dest_val);
1067 gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
1070 case GST_QUERY_LATENCY:
1073 GstClockTime min_latency, max_latency;
1075 res = gst_pad_peer_query (enc->sinkpad, query);
1077 gst_query_parse_latency (query, &live, &min_latency, &max_latency);
1078 GST_DEBUG_OBJECT (enc, "Peer latency: live %d, min %"
1079 GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
1080 GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
1082 GST_OBJECT_LOCK (enc);
1083 min_latency += priv->min_latency;
1084 if (enc->priv->max_latency == GST_CLOCK_TIME_NONE) {
1085 max_latency = GST_CLOCK_TIME_NONE;
1086 } else if (max_latency != GST_CLOCK_TIME_NONE) {
1087 max_latency += enc->priv->max_latency;
1089 GST_OBJECT_UNLOCK (enc);
1091 gst_query_set_latency (query, live, min_latency, max_latency);
1096 res = gst_pad_query_default (pad, parent, query);
1101 GST_DEBUG_OBJECT (enc, "query failed");
1105 static GstVideoCodecFrame *
1106 gst_video_encoder_new_frame (GstVideoEncoder * encoder, GstBuffer * buf,
1107 GstClockTime pts, GstClockTime dts, GstClockTime duration)
1109 GstVideoEncoderPrivate *priv = encoder->priv;
1110 GstVideoCodecFrame *frame;
1112 frame = g_slice_new0 (GstVideoCodecFrame);
1114 frame->ref_count = 1;
1116 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
1117 frame->system_frame_number = priv->system_frame_number;
1118 priv->system_frame_number++;
1120 frame->presentation_frame_number = priv->presentation_frame_number;
1121 priv->presentation_frame_number++;
1122 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
1124 frame->events = priv->current_frame_events;
1125 priv->current_frame_events = NULL;
1126 frame->input_buffer = buf;
1129 frame->duration = duration;
1135 static GstFlowReturn
1136 gst_video_encoder_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
1138 GstVideoEncoder *encoder;
1139 GstVideoEncoderPrivate *priv;
1140 GstVideoEncoderClass *klass;
1141 GstVideoCodecFrame *frame;
1142 GstClockTime pts, dts, duration;
1143 GstFlowReturn ret = GST_FLOW_OK;
1144 guint64 start, stop, cstart, cstop;
1146 encoder = GST_VIDEO_ENCODER (parent);
1147 priv = encoder->priv;
1148 klass = GST_VIDEO_ENCODER_GET_CLASS (encoder);
1150 g_return_val_if_fail (klass->handle_frame != NULL, GST_FLOW_ERROR);
1152 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
1154 pts = GST_BUFFER_PTS (buf);
1155 dts = GST_BUFFER_DTS (buf);
1156 duration = GST_BUFFER_DURATION (buf);
1158 GST_LOG_OBJECT (encoder,
1159 "received buffer of size %" G_GSIZE_FORMAT " with PTS %" GST_TIME_FORMAT
1160 ", PTS %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
1161 gst_buffer_get_size (buf), GST_TIME_ARGS (pts), GST_TIME_ARGS (dts),
1162 GST_TIME_ARGS (duration));
1170 if (GST_CLOCK_TIME_IS_VALID (duration))
1171 stop = start + duration;
1173 stop = GST_CLOCK_TIME_NONE;
1175 /* Drop buffers outside of segment */
1176 if (!gst_segment_clip (&encoder->output_segment,
1177 GST_FORMAT_TIME, start, stop, &cstart, &cstop)) {
1178 GST_DEBUG_OBJECT (encoder, "clipping to segment dropped frame");
1179 gst_buffer_unref (buf);
1184 gst_video_encoder_new_frame (encoder, buf, cstart, dts, cstop - cstart);
1186 GST_OBJECT_LOCK (encoder);
1187 if (priv->force_key_unit) {
1188 ForcedKeyUnitEvent *fevt = NULL;
1189 GstClockTime running_time;
1193 gst_segment_to_running_time (&encoder->output_segment, GST_FORMAT_TIME,
1196 for (l = priv->force_key_unit; l; l = l->next) {
1197 ForcedKeyUnitEvent *tmp = l->data;
1199 /* Skip pending keyunits */
1203 /* Simple case, keyunit ASAP */
1204 if (tmp->running_time == GST_CLOCK_TIME_NONE) {
1209 /* Event for before this frame */
1210 if (tmp->running_time <= running_time) {
1217 GST_DEBUG_OBJECT (encoder,
1218 "Forcing a key unit at running time %" GST_TIME_FORMAT,
1219 GST_TIME_ARGS (running_time));
1220 GST_VIDEO_CODEC_FRAME_SET_FORCE_KEYFRAME (frame);
1221 if (fevt->all_headers)
1222 GST_VIDEO_CODEC_FRAME_SET_FORCE_KEYFRAME_HEADERS (frame);
1223 fevt->pending = TRUE;
1226 GST_OBJECT_UNLOCK (encoder);
1228 gst_video_codec_frame_ref (frame);
1229 priv->frames = g_list_append (priv->frames, frame);
1231 /* new data, more finish needed */
1232 priv->drained = FALSE;
1234 GST_LOG_OBJECT (encoder, "passing frame pfn %d to subclass",
1235 frame->presentation_frame_number);
1237 ret = klass->handle_frame (encoder, frame);
1240 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
1245 static GstStateChangeReturn
1246 gst_video_encoder_change_state (GstElement * element, GstStateChange transition)
1248 GstVideoEncoder *encoder;
1249 GstVideoEncoderClass *encoder_class;
1250 GstStateChangeReturn ret;
1252 encoder = GST_VIDEO_ENCODER (element);
1253 encoder_class = GST_VIDEO_ENCODER_GET_CLASS (element);
1255 switch (transition) {
1256 case GST_STATE_CHANGE_NULL_TO_READY:
1257 /* open device/library if needed */
1258 if (encoder_class->open && !encoder_class->open (encoder))
1261 case GST_STATE_CHANGE_READY_TO_PAUSED:
1262 /* Initialize device/library if needed */
1263 if (encoder_class->start && !encoder_class->start (encoder))
1270 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1272 switch (transition) {
1273 case GST_STATE_CHANGE_PAUSED_TO_READY:
1274 gst_video_encoder_reset (encoder);
1275 if (encoder_class->stop && !encoder_class->stop (encoder))
1278 case GST_STATE_CHANGE_READY_TO_NULL:
1279 /* close device/library if needed */
1280 if (encoder_class->close && !encoder_class->close (encoder))
1293 GST_ELEMENT_ERROR (encoder, LIBRARY, INIT, (NULL),
1294 ("Failed to open encoder"));
1295 return GST_STATE_CHANGE_FAILURE;
1300 GST_ELEMENT_ERROR (encoder, LIBRARY, INIT, (NULL),
1301 ("Failed to start encoder"));
1302 return GST_STATE_CHANGE_FAILURE;
1307 GST_ELEMENT_ERROR (encoder, LIBRARY, INIT, (NULL),
1308 ("Failed to stop encoder"));
1309 return GST_STATE_CHANGE_FAILURE;
1314 GST_ELEMENT_ERROR (encoder, LIBRARY, INIT, (NULL),
1315 ("Failed to close encoder"));
1316 return GST_STATE_CHANGE_FAILURE;
1321 gst_video_encoder_set_src_caps (GstVideoEncoder * encoder)
1323 GstVideoEncoderClass *klass = GST_VIDEO_ENCODER_GET_CLASS (encoder);
1324 GstAllocator *allocator;
1325 GstAllocationParams params;
1327 GstVideoCodecState *state = encoder->priv->output_state;
1328 GstVideoInfo *info = &state->info;
1329 GstQuery *query = NULL;
1331 g_return_val_if_fail (state->caps != NULL, FALSE);
1333 if (encoder->priv->output_state_changed) {
1334 state->caps = gst_caps_make_writable (state->caps);
1337 gst_caps_set_simple (state->caps, "width", G_TYPE_INT, info->width,
1338 "height", G_TYPE_INT, info->height,
1339 "pixel-aspect-ratio", GST_TYPE_FRACTION,
1340 info->par_n, info->par_d, NULL);
1341 if (info->flags & GST_VIDEO_FLAG_VARIABLE_FPS && info->fps_n != 0) {
1342 /* variable fps with a max-framerate */
1343 gst_caps_set_simple (state->caps, "framerate", GST_TYPE_FRACTION, 0, 1,
1344 "max-framerate", GST_TYPE_FRACTION, info->fps_n, info->fps_d, NULL);
1346 /* no variable fps or no max-framerate */
1347 gst_caps_set_simple (state->caps, "framerate", GST_TYPE_FRACTION,
1348 info->fps_n, info->fps_d, NULL);
1350 if (state->codec_data)
1351 gst_caps_set_simple (state->caps, "codec_data", GST_TYPE_BUFFER,
1352 state->codec_data, NULL);
1353 encoder->priv->output_state_changed = FALSE;
1356 ret = gst_pad_set_caps (encoder->srcpad, state->caps);
1360 query = gst_query_new_allocation (state->caps, TRUE);
1361 if (!gst_pad_peer_query (encoder->srcpad, query)) {
1362 GST_DEBUG_OBJECT (encoder, "didn't get downstream ALLOCATION hints");
1365 g_assert (klass->decide_allocation != NULL);
1366 ret = klass->decide_allocation (encoder, query);
1368 GST_DEBUG_OBJECT (encoder, "ALLOCATION (%d) params: %" GST_PTR_FORMAT, ret,
1372 goto no_decide_allocation;
1374 /* we got configuration from our peer or the decide_allocation method,
1376 if (gst_query_get_n_allocation_params (query) > 0) {
1377 gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
1380 gst_allocation_params_init (¶ms);
1383 if (encoder->priv->allocator)
1384 gst_object_unref (encoder->priv->allocator);
1385 encoder->priv->allocator = allocator;
1386 encoder->priv->params = params;
1390 gst_query_unref (query);
1395 no_decide_allocation:
1397 GST_WARNING_OBJECT (encoder, "Subclass failed to decide allocation");
1403 * gst_video_encoder_allocate_output_buffer:
1404 * @encoder: a #GstVideoEncoder
1405 * @size: size of the buffer
1407 * Helper function that allocates a buffer to hold an encoded video frame
1408 * for @encoder's current #GstVideoCodecState.
1410 * Returns: (transfer full): allocated buffer
1413 gst_video_encoder_allocate_output_buffer (GstVideoEncoder * encoder, gsize size)
1417 g_return_val_if_fail (size > 0, NULL);
1419 GST_DEBUG ("alloc src buffer");
1421 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
1422 if (G_UNLIKELY (encoder->priv->output_state_changed
1423 || (encoder->priv->output_state
1424 && gst_pad_check_reconfigure (encoder->srcpad))))
1425 gst_video_encoder_set_src_caps (encoder);
1428 gst_buffer_new_allocate (encoder->priv->allocator, size,
1429 &encoder->priv->params);
1431 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
1437 * gst_video_encoder_allocate_output_frame:
1438 * @encoder: a #GstVideoEncoder
1439 * @frame: a #GstVideoCodecFrame
1440 * @size: size of the buffer
1442 * Helper function that allocates a buffer to hold an encoded video frame for @encoder's
1443 * current #GstVideoCodecState. Subclass should already have configured video
1444 * state and set src pad caps.
1446 * The buffer allocated here is owned by the frame and you should only
1447 * keep references to the frame, not the buffer.
1449 * Returns: %GST_FLOW_OK if an output buffer could be allocated
1452 gst_video_encoder_allocate_output_frame (GstVideoEncoder *
1453 encoder, GstVideoCodecFrame * frame, gsize size)
1455 g_return_val_if_fail (frame->output_buffer == NULL, GST_FLOW_ERROR);
1456 g_return_val_if_fail (size > 0, GST_FLOW_ERROR);
1458 if (G_UNLIKELY (encoder->priv->output_state_changed
1459 || (encoder->priv->output_state
1460 && gst_pad_check_reconfigure (encoder->srcpad))))
1461 gst_video_encoder_set_src_caps (encoder);
1463 GST_LOG_OBJECT (encoder, "alloc buffer size %d", size);
1464 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
1466 frame->output_buffer =
1467 gst_buffer_new_allocate (encoder->priv->allocator, size,
1468 &encoder->priv->params);
1470 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
1472 return frame->output_buffer ? GST_FLOW_OK : GST_FLOW_ERROR;
1476 * gst_video_encoder_finish_frame:
1477 * @encoder: a #GstVideoEncoder
1478 * @frame: (transfer full): an encoded #GstVideoCodecFrame
1480 * @frame must have a valid encoded data buffer, whose metadata fields
1481 * are then appropriately set according to frame data or no buffer at
1482 * all if the frame should be dropped.
1483 * It is subsequently pushed downstream or provided to @pre_push.
1484 * In any case, the frame is considered finished and released.
1486 * After calling this function the output buffer of the frame is to be
1487 * considered read-only. This function will also change the metadata
1490 * Returns: a #GstFlowReturn resulting from sending data downstream
1493 gst_video_encoder_finish_frame (GstVideoEncoder * encoder,
1494 GstVideoCodecFrame * frame)
1496 GstVideoEncoderPrivate *priv = encoder->priv;
1497 GstFlowReturn ret = GST_FLOW_OK;
1498 GstVideoEncoderClass *encoder_class;
1500 gboolean send_headers = FALSE;
1501 gboolean discont = (frame->presentation_frame_number == 0);
1503 encoder_class = GST_VIDEO_ENCODER_GET_CLASS (encoder);
1505 GST_LOG_OBJECT (encoder,
1506 "finish frame fpn %d", frame->presentation_frame_number);
1508 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
1510 if (G_UNLIKELY (priv->output_state_changed || (priv->output_state
1511 && gst_pad_check_reconfigure (encoder->srcpad))))
1512 gst_video_encoder_set_src_caps (encoder);
1515 if (G_UNLIKELY (priv->output_state == NULL))
1516 goto no_output_state;
1518 /* Push all pending events that arrived before this frame */
1519 for (l = priv->frames; l; l = l->next) {
1520 GstVideoCodecFrame *tmp = l->data;
1525 for (k = g_list_last (tmp->events); k; k = k->prev)
1526 gst_video_encoder_push_event (encoder, k->data);
1527 g_list_free (tmp->events);
1535 /* no buffer data means this frame is skipped/dropped */
1536 if (!frame->output_buffer) {
1537 GST_DEBUG_OBJECT (encoder, "skipping frame %" GST_TIME_FORMAT,
1538 GST_TIME_ARGS (frame->pts));
1542 if (GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT (frame) && priv->force_key_unit) {
1543 GstClockTime stream_time, running_time;
1545 ForcedKeyUnitEvent *fevt = NULL;
1549 gst_segment_to_running_time (&encoder->output_segment, GST_FORMAT_TIME,
1552 GST_OBJECT_LOCK (encoder);
1553 for (l = priv->force_key_unit; l; l = l->next) {
1554 ForcedKeyUnitEvent *tmp = l->data;
1556 /* Skip non-pending keyunits */
1560 /* Simple case, keyunit ASAP */
1561 if (tmp->running_time == GST_CLOCK_TIME_NONE) {
1566 /* Event for before this frame */
1567 if (tmp->running_time <= running_time) {
1574 priv->force_key_unit = g_list_remove (priv->force_key_unit, fevt);
1576 GST_OBJECT_UNLOCK (encoder);
1580 gst_segment_to_stream_time (&encoder->output_segment, GST_FORMAT_TIME,
1583 ev = gst_video_event_new_downstream_force_key_unit
1584 (frame->pts, stream_time, running_time,
1585 fevt->all_headers, fevt->count);
1587 gst_video_encoder_push_event (encoder, ev);
1589 if (fevt->all_headers)
1590 send_headers = TRUE;
1592 GST_DEBUG_OBJECT (encoder,
1593 "Forced key unit: running-time %" GST_TIME_FORMAT
1594 ", all_headers %d, count %u",
1595 GST_TIME_ARGS (running_time), fevt->all_headers, fevt->count);
1596 forced_key_unit_event_free (fevt);
1600 if (GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT (frame)) {
1601 priv->distance_from_sync = 0;
1602 GST_BUFFER_FLAG_UNSET (frame->output_buffer, GST_BUFFER_FLAG_DELTA_UNIT);
1603 /* For keyframes, DTS = PTS */
1604 frame->dts = frame->pts;
1606 GST_BUFFER_FLAG_SET (frame->output_buffer, GST_BUFFER_FLAG_DELTA_UNIT);
1609 frame->distance_from_sync = priv->distance_from_sync;
1610 priv->distance_from_sync++;
1612 GST_BUFFER_PTS (frame->output_buffer) = frame->pts;
1613 GST_BUFFER_DTS (frame->output_buffer) = frame->dts;
1614 GST_BUFFER_DURATION (frame->output_buffer) = frame->duration;
1616 /* update rate estimate */
1617 priv->bytes += gst_buffer_get_size (frame->output_buffer);
1618 if (GST_CLOCK_TIME_IS_VALID (frame->duration)) {
1619 priv->time += frame->duration;
1621 /* better none than nothing valid */
1622 priv->time = GST_CLOCK_TIME_NONE;
1625 if (G_UNLIKELY (send_headers || priv->new_headers)) {
1626 GList *tmp, *copy = NULL;
1628 GST_DEBUG_OBJECT (encoder, "Sending headers");
1630 /* First make all buffers metadata-writable */
1631 for (tmp = priv->headers; tmp; tmp = tmp->next) {
1632 GstBuffer *tmpbuf = GST_BUFFER (tmp->data);
1634 copy = g_list_append (copy, gst_buffer_make_writable (tmpbuf));
1636 g_list_free (priv->headers);
1637 priv->headers = copy;
1639 for (tmp = priv->headers; tmp; tmp = tmp->next) {
1640 GstBuffer *tmpbuf = GST_BUFFER (tmp->data);
1642 gst_buffer_ref (tmpbuf);
1643 priv->bytes += gst_buffer_get_size (tmpbuf);
1644 if (G_UNLIKELY (discont)) {
1645 GST_LOG_OBJECT (encoder, "marking discont");
1646 GST_BUFFER_FLAG_SET (tmpbuf, GST_BUFFER_FLAG_DISCONT);
1650 gst_pad_push (encoder->srcpad, tmpbuf);
1652 priv->new_headers = FALSE;
1655 if (G_UNLIKELY (discont)) {
1656 GST_LOG_OBJECT (encoder, "marking discont");
1657 GST_BUFFER_FLAG_SET (frame->output_buffer, GST_BUFFER_FLAG_DISCONT);
1660 if (encoder_class->pre_push)
1661 ret = encoder_class->pre_push (encoder, frame);
1663 /* A reference always needs to be owned by the frame on the buffer.
1664 * For that reason, we use a complete sub-buffer (zero-cost) to push
1666 * The original buffer will be free-ed only when downstream AND the
1667 * current implementation are done with the frame. */
1668 if (ret == GST_FLOW_OK)
1669 ret = gst_pad_push (encoder->srcpad, gst_buffer_ref (frame->output_buffer));
1674 /* unref once from the list */
1675 l = g_list_find (priv->frames, frame);
1677 gst_video_codec_frame_unref (frame);
1678 priv->frames = g_list_delete_link (priv->frames, l);
1680 /* unref because this function takes ownership */
1681 gst_video_codec_frame_unref (frame);
1683 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
1690 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
1691 GST_ERROR_OBJECT (encoder, "Output state was not configured");
1692 return GST_FLOW_ERROR;
1697 * gst_video_encoder_get_output_state:
1698 * @encoder: a #GstVideoEncoder
1700 * Get the current #GstVideoCodecState
1702 * Returns: (transfer full): #GstVideoCodecState describing format of video data.
1704 GstVideoCodecState *
1705 gst_video_encoder_get_output_state (GstVideoEncoder * encoder)
1707 GstVideoCodecState *state;
1709 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
1710 state = gst_video_codec_state_ref (encoder->priv->output_state);
1711 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
1717 * gst_video_encoder_set_output_state:
1718 * @encoder: a #GstVideoEncoder
1719 * @caps: (transfer full): the #GstCaps to use for the output
1720 * @reference: (allow-none) (transfer none): An optional reference @GstVideoCodecState
1722 * Creates a new #GstVideoCodecState with the specified caps as the output state
1724 * Any previously set output state on @decoder will be replaced by the newly
1727 * The specified @caps should not contain any resolution, pixel-aspect-ratio,
1728 * framerate, codec-data, .... Those should be specified instead in the returned
1729 * #GstVideoCodecState.
1731 * If the subclass wishes to copy over existing fields (like pixel aspect ratio,
1732 * or framerate) from an existing #GstVideoCodecState, it can be provided as a
1735 * If the subclass wishes to override some fields from the output state (like
1736 * pixel-aspect-ratio or framerate) it can do so on the returned #GstVideoCodecState.
1738 * The new output state will only take effect (set on pads and buffers) starting
1739 * from the next call to #gst_video_encoder_finish_frame().
1741 * Returns: (transfer full): the newly configured output state.
1743 GstVideoCodecState *
1744 gst_video_encoder_set_output_state (GstVideoEncoder * encoder, GstCaps * caps,
1745 GstVideoCodecState * reference)
1747 GstVideoEncoderPrivate *priv = encoder->priv;
1748 GstVideoCodecState *state;
1750 g_return_val_if_fail (caps != NULL, NULL);
1752 state = _new_output_state (caps, reference);
1754 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
1755 if (priv->output_state)
1756 gst_video_codec_state_unref (priv->output_state);
1757 priv->output_state = gst_video_codec_state_ref (state);
1759 priv->output_state_changed = TRUE;
1760 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
1766 * gst_video_encoder_set_latency:
1767 * @encoder: a #GstVideoEncoder
1768 * @min_latency: minimum latency
1769 * @max_latency: maximum latency
1771 * Informs baseclass of encoding latency.
1774 gst_video_encoder_set_latency (GstVideoEncoder * encoder,
1775 GstClockTime min_latency, GstClockTime max_latency)
1777 g_return_if_fail (GST_CLOCK_TIME_IS_VALID (min_latency));
1778 g_return_if_fail (max_latency >= min_latency);
1780 GST_OBJECT_LOCK (encoder);
1781 encoder->priv->min_latency = min_latency;
1782 encoder->priv->max_latency = max_latency;
1783 GST_OBJECT_UNLOCK (encoder);
1785 gst_element_post_message (GST_ELEMENT_CAST (encoder),
1786 gst_message_new_latency (GST_OBJECT_CAST (encoder)));
1790 * gst_video_encoder_get_latency:
1791 * @encoder: a #GstVideoEncoder
1792 * @min_latency: (out) (allow-none): address of variable in which to store the
1793 * configured minimum latency, or %NULL
1794 * @max_latency: (out) (allow-none): address of variable in which to store the
1795 * configured maximum latency, or %NULL
1797 * Query the configured encoding latency. Results will be returned via
1798 * @min_latency and @max_latency.
1801 gst_video_encoder_get_latency (GstVideoEncoder * encoder,
1802 GstClockTime * min_latency, GstClockTime * max_latency)
1804 GST_OBJECT_LOCK (encoder);
1806 *min_latency = encoder->priv->min_latency;
1808 *max_latency = encoder->priv->max_latency;
1809 GST_OBJECT_UNLOCK (encoder);
1813 * gst_video_encoder_get_oldest_frame:
1814 * @encoder: a #GstVideoEncoder
1816 * Get the oldest unfinished pending #GstVideoCodecFrame
1818 * Returns: (transfer full): oldest unfinished pending #GstVideoCodecFrame
1820 GstVideoCodecFrame *
1821 gst_video_encoder_get_oldest_frame (GstVideoEncoder * encoder)
1823 GstVideoCodecFrame *frame = NULL;
1825 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
1826 if (encoder->priv->frames)
1827 frame = gst_video_codec_frame_ref (encoder->priv->frames->data);
1828 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
1830 return (GstVideoCodecFrame *) frame;
1834 * gst_video_encoder_get_frame:
1835 * @encoder: a #GstVideoEnccoder
1836 * @frame_number: system_frame_number of a frame
1838 * Get a pending unfinished #GstVideoCodecFrame
1840 * Returns: (transfer full): pending unfinished #GstVideoCodecFrame identified by @frame_number.
1842 GstVideoCodecFrame *
1843 gst_video_encoder_get_frame (GstVideoEncoder * encoder, int frame_number)
1846 GstVideoCodecFrame *frame = NULL;
1848 GST_DEBUG_OBJECT (encoder, "frame_number : %d", frame_number);
1850 GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
1851 for (g = encoder->priv->frames; g; g = g->next) {
1852 GstVideoCodecFrame *tmp = g->data;
1854 if (tmp->system_frame_number == frame_number) {
1855 frame = gst_video_codec_frame_ref (tmp);
1859 GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);