gstvideoencoder.c 67 KB
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/* GStreamer
 * Copyright (C) 2008 David Schleef <ds@schleef.org>
 * Copyright (C) 2011 Mark Nauwelaerts <mark.nauwelaerts@collabora.co.uk>.
 * Copyright (C) 2011 Nokia Corporation. All rights reserved.
 *   Contact: Stefan Kost <stefan.kost@nokia.com>
 * Copyright (C) 2012 Collabora Ltd.
 *	Author : Edward Hervey <edward@collabora.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
Tim-Philipp Müller's avatar
Tim-Philipp Müller committed
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 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA 02110-1301, USA.
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 */

/**
 * SECTION:gstvideoencoder
 * @short_description: Base class for video encoders
 * @see_also:
 *
 * This base class is for video encoders turning raw video into
 * encoded video data.
 *
 * GstVideoEncoder and subclass should cooperate as follows.
 * <orderedlist>
 * <listitem>
 *   <itemizedlist><title>Configuration</title>
 *   <listitem><para>
 *     Initially, GstVideoEncoder calls @start when the encoder element
 *     is activated, which allows subclass to perform any global setup.
 *   </para></listitem>
 *   <listitem><para>
 *     GstVideoEncoder calls @set_format to inform subclass of the format
 *     of input video data that it is about to receive.  Subclass should
 *     setup for encoding and configure base class as appropriate
 *     (e.g. latency). While unlikely, it might be called more than once,
 *     if changing input parameters require reconfiguration.  Baseclass
 *     will ensure that processing of current configuration is finished.
 *   </para></listitem>
 *   <listitem><para>
 *     GstVideoEncoder calls @stop at end of all processing.
 *   </para></listitem>
 *   </itemizedlist>
 * </listitem>
 * <listitem>
 *   <itemizedlist>
 *   <title>Data processing</title>
 *     <listitem><para>
 *       Base class collects input data and metadata into a frame and hands
 *       this to subclass' @handle_frame.
 *     </para></listitem>
 *     <listitem><para>
 *       If codec processing results in encoded data, subclass should call
 *       @gst_video_encoder_finish_frame to have encoded data pushed
 *       downstream.
 *     </para></listitem>
 *     <listitem><para>
 *       If implemented, baseclass calls subclass @pre_push just prior to
 *       pushing to allow subclasses to modify some metadata on the buffer.
 *       If it returns GST_FLOW_OK, the buffer is pushed downstream.
 *     </para></listitem>
 *     <listitem><para>
 *       GstVideoEncoderClass will handle both srcpad and sinkpad events.
 *       Sink events will be passed to subclass if @event callback has been
 *       provided.
 *     </para></listitem>
 *   </itemizedlist>
 * </listitem>
 * <listitem>
 *   <itemizedlist><title>Shutdown phase</title>
 *   <listitem><para>
 *     GstVideoEncoder class calls @stop to inform the subclass that data
 *     parsing will be stopped.
 *   </para></listitem>
 *   </itemizedlist>
 * </listitem>
 * </orderedlist>
 *
 * Subclass is responsible for providing pad template caps for
 * source and sink pads. The pads need to be named "sink" and "src". It should
 * also be able to provide fixed src pad caps in @getcaps by the time it calls
 * @gst_video_encoder_finish_frame.
 *
 * Things that subclass need to take care of:
 * <itemizedlist>
 *   <listitem><para>Provide pad templates</para></listitem>
 *   <listitem><para>
 *      Provide source pad caps before pushing the first buffer
 *   </para></listitem>
 *   <listitem><para>
 *      Accept data in @handle_frame and provide encoded results to
 *      @gst_video_encoder_finish_frame.
 *   </para></listitem>
 * </itemizedlist>
 *
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

/* TODO
 *
 * * Calculate actual latency based on input/output timestamp/frame_number
 *   and if it exceeds the recorded one, save it and emit a GST_MESSAGE_LATENCY
 */

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#include <gst/video/video.h>
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#include "gstvideoencoder.h"
#include "gstvideoutils.h"

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#include <gst/video/gstvideometa.h>
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#include <gst/video/gstvideopool.h>
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#include <string.h>

GST_DEBUG_CATEGORY (videoencoder_debug);
#define GST_CAT_DEFAULT videoencoder_debug

#define GST_VIDEO_ENCODER_GET_PRIVATE(obj)  \
    (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_VIDEO_ENCODER, \
        GstVideoEncoderPrivate))

struct _GstVideoEncoderPrivate
{
  guint64 presentation_frame_number;
  int distance_from_sync;

  /* FIXME : (and introduce a context ?) */
  gboolean drained;
  gboolean at_eos;
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  gboolean do_caps;
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  gint64 min_latency;
  gint64 max_latency;

  GList *current_frame_events;

  GList *headers;
  gboolean new_headers;         /* Whether new headers were just set */

  GList *force_key_unit;        /* List of pending forced keyunits */

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  guint32 system_frame_number;
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  GList *frames;                /* Protected with OBJECT_LOCK */
  GstVideoCodecState *input_state;
  GstVideoCodecState *output_state;
  gboolean output_state_changed;

  gint64 bytes;
  gint64 time;
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  GstAllocator *allocator;
  GstAllocationParams params;
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  GstTagList *tags;
  gboolean tags_changed;
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};

typedef struct _ForcedKeyUnitEvent ForcedKeyUnitEvent;
struct _ForcedKeyUnitEvent
{
  GstClockTime running_time;
  gboolean pending;             /* TRUE if this was requested already */
  gboolean all_headers;
  guint count;
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  guint32 frame_id;
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};

static void
forced_key_unit_event_free (ForcedKeyUnitEvent * evt)
{
  g_slice_free (ForcedKeyUnitEvent, evt);
}

static ForcedKeyUnitEvent *
forced_key_unit_event_new (GstClockTime running_time, gboolean all_headers,
    guint count)
{
  ForcedKeyUnitEvent *evt = g_slice_new0 (ForcedKeyUnitEvent);

  evt->running_time = running_time;
  evt->all_headers = all_headers;
  evt->count = count;

  return evt;
}

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static GstElementClass *parent_class = NULL;
static void gst_video_encoder_class_init (GstVideoEncoderClass * klass);
static void gst_video_encoder_init (GstVideoEncoder * enc,
    GstVideoEncoderClass * klass);

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static void gst_video_encoder_finalize (GObject * object);

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static gboolean gst_video_encoder_setcaps (GstVideoEncoder * enc,
    GstCaps * caps);
static GstCaps *gst_video_encoder_sink_getcaps (GstVideoEncoder * encoder,
    GstCaps * filter);
static gboolean gst_video_encoder_src_event (GstPad * pad, GstObject * parent,
    GstEvent * event);
static gboolean gst_video_encoder_sink_event (GstPad * pad, GstObject * parent,
    GstEvent * event);
static GstFlowReturn gst_video_encoder_chain (GstPad * pad, GstObject * parent,
    GstBuffer * buf);
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static GstStateChangeReturn gst_video_encoder_change_state (GstElement *
    element, GstStateChange transition);
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static gboolean gst_video_encoder_sink_query (GstPad * pad, GstObject * parent,
    GstQuery * query);
static gboolean gst_video_encoder_src_query (GstPad * pad, GstObject * parent,
    GstQuery * query);
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static GstVideoCodecFrame *gst_video_encoder_new_frame (GstVideoEncoder *
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    encoder, GstBuffer * buf, GstClockTime pts, GstClockTime dts,
    GstClockTime duration);
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static gboolean gst_video_encoder_sink_event_default (GstVideoEncoder * encoder,
    GstEvent * event);
static gboolean gst_video_encoder_src_event_default (GstVideoEncoder * encoder,
    GstEvent * event);
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static gboolean gst_video_encoder_decide_allocation_default (GstVideoEncoder *
    encoder, GstQuery * query);
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static gboolean gst_video_encoder_propose_allocation_default (GstVideoEncoder *
    encoder, GstQuery * query);
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static gboolean gst_video_encoder_negotiate_default (GstVideoEncoder * encoder);
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static gboolean gst_video_encoder_negotiate_unlocked (GstVideoEncoder *
    encoder);
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static gboolean gst_video_encoder_sink_query_default (GstVideoEncoder * encoder,
    GstQuery * query);
static gboolean gst_video_encoder_src_query_default (GstVideoEncoder * encoder,
    GstQuery * query);

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/* we can't use G_DEFINE_ABSTRACT_TYPE because we need the klass in the _init
 * method to get to the padtemplates */
GType
gst_video_encoder_get_type (void)
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{
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  static volatile gsize type = 0;

  if (g_once_init_enter (&type)) {
    GType _type;
    static const GTypeInfo info = {
      sizeof (GstVideoEncoderClass),
      NULL,
      NULL,
      (GClassInitFunc) gst_video_encoder_class_init,
      NULL,
      NULL,
      sizeof (GstVideoEncoder),
      0,
      (GInstanceInitFunc) gst_video_encoder_init,
    };
    const GInterfaceInfo preset_interface_info = {
      NULL,                     /* interface_init */
      NULL,                     /* interface_finalize */
      NULL                      /* interface_data */
    };

    _type = g_type_register_static (GST_TYPE_ELEMENT,
        "GstVideoEncoder", &info, G_TYPE_FLAG_ABSTRACT);
    g_type_add_interface_static (_type, GST_TYPE_PRESET,
        &preset_interface_info);
    g_once_init_leave (&type, _type);
  }
  return type;
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}

static void
gst_video_encoder_class_init (GstVideoEncoderClass * klass)
{
  GObjectClass *gobject_class;
  GstElementClass *gstelement_class;

  gobject_class = G_OBJECT_CLASS (klass);
  gstelement_class = GST_ELEMENT_CLASS (klass);

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  GST_DEBUG_CATEGORY_INIT (videoencoder_debug, "videoencoder", 0,
      "Base Video Encoder");

  parent_class = g_type_class_peek_parent (klass);

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  g_type_class_add_private (klass, sizeof (GstVideoEncoderPrivate));

  gobject_class->finalize = gst_video_encoder_finalize;

  gstelement_class->change_state =
      GST_DEBUG_FUNCPTR (gst_video_encoder_change_state);
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  klass->sink_event = gst_video_encoder_sink_event_default;
  klass->src_event = gst_video_encoder_src_event_default;
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  klass->propose_allocation = gst_video_encoder_propose_allocation_default;
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  klass->decide_allocation = gst_video_encoder_decide_allocation_default;
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  klass->negotiate = gst_video_encoder_negotiate_default;
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  klass->sink_query = gst_video_encoder_sink_query_default;
  klass->src_query = gst_video_encoder_src_query_default;
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}

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static GList *
_flush_events (GstPad * pad, GList * events)
{
  GList *tmp;

  for (tmp = events; tmp; tmp = tmp->next) {
    if (GST_EVENT_TYPE (tmp->data) == GST_EVENT_EOS ||
        GST_EVENT_TYPE (tmp->data) == GST_EVENT_SEGMENT ||
        !GST_EVENT_IS_STICKY (tmp->data)) {
      gst_event_unref (tmp->data);
    } else {
      gst_pad_store_sticky_event (pad, GST_EVENT_CAST (tmp->data));
    }
  }
  g_list_free (events);

  return NULL;
}

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static gboolean
gst_video_encoder_reset (GstVideoEncoder * encoder, gboolean hard)
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{
  GstVideoEncoderPrivate *priv = encoder->priv;
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  gboolean ret = TRUE;
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  GST_VIDEO_ENCODER_STREAM_LOCK (encoder);

  priv->presentation_frame_number = 0;
  priv->distance_from_sync = 0;

  g_list_foreach (priv->force_key_unit, (GFunc) forced_key_unit_event_free,
      NULL);
  g_list_free (priv->force_key_unit);
  priv->force_key_unit = NULL;

  priv->drained = TRUE;

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  g_list_foreach (priv->frames, (GFunc) gst_video_codec_frame_unref, NULL);
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  g_list_free (priv->frames);
  priv->frames = NULL;

  priv->bytes = 0;
  priv->time = 0;

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  if (hard) {
    gst_segment_init (&encoder->input_segment, GST_FORMAT_TIME);
    gst_segment_init (&encoder->output_segment, GST_FORMAT_TIME);

    if (priv->input_state)
      gst_video_codec_state_unref (priv->input_state);
    priv->input_state = NULL;
    if (priv->output_state)
      gst_video_codec_state_unref (priv->output_state);
    priv->output_state = NULL;

    if (priv->tags)
      gst_tag_list_unref (priv->tags);
    priv->tags = NULL;
    priv->tags_changed = FALSE;

    priv->min_latency = 0;
    priv->max_latency = 0;

    g_list_foreach (priv->headers, (GFunc) gst_event_unref, NULL);
    g_list_free (priv->headers);
    priv->headers = NULL;
    priv->new_headers = FALSE;
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    if (priv->allocator) {
      gst_object_unref (priv->allocator);
      priv->allocator = NULL;
    }
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    g_list_foreach (priv->current_frame_events, (GFunc) gst_event_unref, NULL);
    g_list_free (priv->current_frame_events);
    priv->current_frame_events = NULL;

  } else {
    GList *l;

    for (l = priv->frames; l; l = l->next) {
      GstVideoCodecFrame *frame = l->data;

      frame->events = _flush_events (encoder->srcpad, frame->events);
    }
    priv->current_frame_events = _flush_events (encoder->srcpad,
        encoder->priv->current_frame_events);
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  }
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  GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
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  return ret;
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}

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/* Always call reset() in one way or another after this */
static gboolean
gst_video_encoder_flush (GstVideoEncoder * encoder)
{
  GstVideoEncoderClass *klass = GST_VIDEO_ENCODER_GET_CLASS (encoder);
  gboolean ret = TRUE;

  GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
  if (klass->flush)
    ret = klass->flush (encoder);

  GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
  return ret;
}

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static void
gst_video_encoder_init (GstVideoEncoder * encoder, GstVideoEncoderClass * klass)
{
  GstVideoEncoderPrivate *priv;
  GstPadTemplate *pad_template;
  GstPad *pad;

  GST_DEBUG_OBJECT (encoder, "gst_video_encoder_init");

  priv = encoder->priv = GST_VIDEO_ENCODER_GET_PRIVATE (encoder);

  pad_template =
      gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "sink");
  g_return_if_fail (pad_template != NULL);

  encoder->sinkpad = pad = gst_pad_new_from_template (pad_template, "sink");

  gst_pad_set_chain_function (pad, GST_DEBUG_FUNCPTR (gst_video_encoder_chain));
  gst_pad_set_event_function (pad,
      GST_DEBUG_FUNCPTR (gst_video_encoder_sink_event));
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  gst_pad_set_query_function (pad,
      GST_DEBUG_FUNCPTR (gst_video_encoder_sink_query));
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  gst_element_add_pad (GST_ELEMENT (encoder), encoder->sinkpad);

  pad_template =
      gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "src");
  g_return_if_fail (pad_template != NULL);

  encoder->srcpad = pad = gst_pad_new_from_template (pad_template, "src");

  gst_pad_set_query_function (pad,
      GST_DEBUG_FUNCPTR (gst_video_encoder_src_query));
  gst_pad_set_event_function (pad,
      GST_DEBUG_FUNCPTR (gst_video_encoder_src_event));
  gst_element_add_pad (GST_ELEMENT (encoder), encoder->srcpad);

  gst_segment_init (&encoder->input_segment, GST_FORMAT_TIME);
  gst_segment_init (&encoder->output_segment, GST_FORMAT_TIME);

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  g_rec_mutex_init (&encoder->stream_lock);
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  priv->at_eos = FALSE;
  priv->headers = NULL;
  priv->new_headers = FALSE;

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  gst_video_encoder_reset (encoder, TRUE);
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}

static gboolean
gst_video_encoded_video_convert (gint64 bytes, gint64 time,
    GstFormat src_format, gint64 src_value, GstFormat * dest_format,
    gint64 * dest_value)
{
  gboolean res = FALSE;

  g_return_val_if_fail (dest_format != NULL, FALSE);
  g_return_val_if_fail (dest_value != NULL, FALSE);

  if (G_UNLIKELY (src_format == *dest_format || src_value == 0 ||
          src_value == -1)) {
    if (dest_value)
      *dest_value = src_value;
    return TRUE;
  }

  if (bytes <= 0 || time <= 0) {
    GST_DEBUG ("not enough metadata yet to convert");
    goto exit;
  }

  switch (src_format) {
    case GST_FORMAT_BYTES:
      switch (*dest_format) {
        case GST_FORMAT_TIME:
          *dest_value = gst_util_uint64_scale (src_value, time, bytes);
          res = TRUE;
          break;
        default:
          res = FALSE;
      }
      break;
    case GST_FORMAT_TIME:
      switch (*dest_format) {
        case GST_FORMAT_BYTES:
          *dest_value = gst_util_uint64_scale (src_value, bytes, time);
          res = TRUE;
          break;
        default:
          res = FALSE;
      }
      break;
    default:
      GST_DEBUG ("unhandled conversion from %d to %d", src_format,
          *dest_format);
      res = FALSE;
  }

exit:
  return res;
}

/**
 * gst_video_encoder_set_headers:
 * @encoder: a #GstVideoEncoder
 * @headers: (transfer full) (element-type GstBuffer): a list of #GstBuffer containing the codec header
 *
 * Set the codec headers to be sent downstream whenever requested.
 */
void
gst_video_encoder_set_headers (GstVideoEncoder * video_encoder, GList * headers)
{
  GST_VIDEO_ENCODER_STREAM_LOCK (video_encoder);

  GST_DEBUG_OBJECT (video_encoder, "new headers %p", headers);
  if (video_encoder->priv->headers) {
    g_list_foreach (video_encoder->priv->headers, (GFunc) gst_buffer_unref,
        NULL);
    g_list_free (video_encoder->priv->headers);
  }
  video_encoder->priv->headers = headers;
  video_encoder->priv->new_headers = TRUE;

  GST_VIDEO_ENCODER_STREAM_UNLOCK (video_encoder);
}

static GstVideoCodecState *
_new_output_state (GstCaps * caps, GstVideoCodecState * reference)
{
  GstVideoCodecState *state;

  state = g_slice_new0 (GstVideoCodecState);
  state->ref_count = 1;
  gst_video_info_init (&state->info);
  gst_video_info_set_format (&state->info, GST_VIDEO_FORMAT_ENCODED, 0, 0);

  state->caps = caps;

  if (reference) {
    GstVideoInfo *tgt, *ref;

    tgt = &state->info;
    ref = &reference->info;

    /* Copy over extra fields from reference state */
    tgt->interlace_mode = ref->interlace_mode;
    tgt->flags = ref->flags;
    tgt->width = ref->width;
    tgt->height = ref->height;
    tgt->chroma_site = ref->chroma_site;
    tgt->colorimetry = ref->colorimetry;
    tgt->par_n = ref->par_n;
    tgt->par_d = ref->par_d;
    tgt->fps_n = ref->fps_n;
    tgt->fps_d = ref->fps_d;
  }

  return state;
}

static GstVideoCodecState *
_new_input_state (GstCaps * caps)
{
  GstVideoCodecState *state;

  state = g_slice_new0 (GstVideoCodecState);
  state->ref_count = 1;
  gst_video_info_init (&state->info);
  if (G_UNLIKELY (!gst_video_info_from_caps (&state->info, caps)))
    goto parse_fail;
  state->caps = gst_caps_ref (caps);

  return state;

parse_fail:
  {
    g_slice_free (GstVideoCodecState, state);
    return NULL;
  }
}

static gboolean
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gst_video_encoder_setcaps (GstVideoEncoder * encoder, GstCaps * caps)
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{
  GstVideoEncoderClass *encoder_class;
  GstVideoCodecState *state;
  gboolean ret;

  encoder_class = GST_VIDEO_ENCODER_GET_CLASS (encoder);

  /* subclass should do something here ... */
  g_return_val_if_fail (encoder_class->set_format != NULL, FALSE);

  GST_DEBUG_OBJECT (encoder, "setcaps %" GST_PTR_FORMAT, caps);

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  GST_VIDEO_ENCODER_STREAM_LOCK (encoder);

  if (encoder->priv->input_state) {
    GST_DEBUG_OBJECT (encoder,
        "Checking if caps changed old %" GST_PTR_FORMAT " new %" GST_PTR_FORMAT,
        encoder->priv->input_state->caps, caps);
    if (gst_caps_is_equal (encoder->priv->input_state->caps, caps))
      goto caps_not_changed;
  }

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  state = _new_input_state (caps);
  if (G_UNLIKELY (!state))
    goto parse_fail;

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  if (encoder->priv->input_state
      && gst_video_info_is_equal (&state->info,
          &encoder->priv->input_state->info)) {
    gst_video_codec_state_unref (state);
    goto caps_not_changed;
  }

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  if (encoder_class->reset) {
    GST_FIXME_OBJECT (encoder, "GstVideoEncoder::reset() is deprecated");
    ret = encoder_class->reset (encoder, TRUE);
  }

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  /* and subclass should be ready to configure format at any time around */
  ret = encoder_class->set_format (encoder, state);
  if (ret) {
    if (encoder->priv->input_state)
      gst_video_codec_state_unref (encoder->priv->input_state);
    encoder->priv->input_state = state;
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  } else {
    gst_video_codec_state_unref (state);
  }

  GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);

  if (!ret)
    GST_WARNING_OBJECT (encoder, "rejected caps %" GST_PTR_FORMAT, caps);

  return ret;

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caps_not_changed:
  {
    GST_DEBUG_OBJECT (encoder, "Caps did not change - ignore");
    GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
    return TRUE;
  }

  /* ERRORS */
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parse_fail:
  {
    GST_WARNING_OBJECT (encoder, "Failed to parse caps");
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    GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
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    return FALSE;
  }
}

/**
 * gst_video_encoder_proxy_getcaps:
 * @enc: a #GstVideoEncoder
 * @caps: initial caps
Mark Nauwelaerts's avatar
Mark Nauwelaerts committed
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 * @filter: filter caps
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 *
 * Returns caps that express @caps (or sink template caps if @caps == NULL)
 * restricted to resolution/format/... combinations supported by downstream
 * elements (e.g. muxers).
 *
 * Returns: a #GstCaps owned by caller
 */
GstCaps *
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gst_video_encoder_proxy_getcaps (GstVideoEncoder * encoder, GstCaps * caps,
    GstCaps * filter)
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{
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  GstCaps *templ_caps;
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  GstCaps *allowed;
  GstCaps *fcaps, *filter_caps;
  gint i, j;

  /* Allow downstream to specify width/height/framerate/PAR constraints
   * and forward them upstream for video converters to handle
   */
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  templ_caps =
      caps ? gst_caps_ref (caps) :
      gst_pad_get_pad_template_caps (encoder->sinkpad);
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  allowed = gst_pad_get_allowed_caps (encoder->srcpad);

  if (!allowed || gst_caps_is_empty (allowed) || gst_caps_is_any (allowed)) {
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    fcaps = templ_caps;
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    goto done;
  }

  GST_LOG_OBJECT (encoder, "template caps %" GST_PTR_FORMAT, templ_caps);
  GST_LOG_OBJECT (encoder, "allowed caps %" GST_PTR_FORMAT, allowed);

  filter_caps = gst_caps_new_empty ();

  for (i = 0; i < gst_caps_get_size (templ_caps); i++) {
    GQuark q_name =
        gst_structure_get_name_id (gst_caps_get_structure (templ_caps, i));

    for (j = 0; j < gst_caps_get_size (allowed); j++) {
      const GstStructure *allowed_s = gst_caps_get_structure (allowed, j);
      const GValue *val;
      GstStructure *s;

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      s = gst_structure_new_id_empty (q_name);
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      if ((val = gst_structure_get_value (allowed_s, "width")))
        gst_structure_set_value (s, "width", val);
      if ((val = gst_structure_get_value (allowed_s, "height")))
        gst_structure_set_value (s, "height", val);
      if ((val = gst_structure_get_value (allowed_s, "framerate")))
        gst_structure_set_value (s, "framerate", val);
      if ((val = gst_structure_get_value (allowed_s, "pixel-aspect-ratio")))
        gst_structure_set_value (s, "pixel-aspect-ratio", val);

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      filter_caps = gst_caps_merge_structure (filter_caps, s);
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    }
  }

  fcaps = gst_caps_intersect (filter_caps, templ_caps);
  gst_caps_unref (filter_caps);
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  gst_caps_unref (templ_caps);

  if (filter) {
    GST_LOG_OBJECT (encoder, "intersecting with %" GST_PTR_FORMAT, filter);
    filter_caps = gst_caps_intersect (fcaps, filter);
    gst_caps_unref (fcaps);
    fcaps = filter_caps;
  }
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done:
  gst_caps_replace (&allowed, NULL);

  GST_LOG_OBJECT (encoder, "proxy caps %" GST_PTR_FORMAT, fcaps);

  return fcaps;
}

static GstCaps *
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gst_video_encoder_sink_getcaps (GstVideoEncoder * encoder, GstCaps * filter)
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{
  GstVideoEncoderClass *klass;
  GstCaps *caps;

  klass = GST_VIDEO_ENCODER_GET_CLASS (encoder);

  if (klass->getcaps)
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    caps = klass->getcaps (encoder, filter);
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  else
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    caps = gst_video_encoder_proxy_getcaps (encoder, NULL, filter);
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  GST_LOG_OBJECT (encoder, "Returning caps %" GST_PTR_FORMAT, caps);

  return caps;
}

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static gboolean
gst_video_encoder_decide_allocation_default (GstVideoEncoder * encoder,
    GstQuery * query)
{
  GstAllocator *allocator = NULL;
  GstAllocationParams params;
  gboolean update_allocator;

  /* we got configuration from our peer or the decide_allocation method,
   * parse them */
  if (gst_query_get_n_allocation_params (query) > 0) {
    /* try the allocator */
    gst_query_parse_nth_allocation_param (query, 0, &allocator, &params);
    update_allocator = TRUE;
  } else {
    allocator = NULL;
    gst_allocation_params_init (&params);
    update_allocator = FALSE;
  }

  if (update_allocator)
    gst_query_set_nth_allocation_param (query, 0, allocator, &params);
  else
    gst_query_add_allocation_param (query, allocator, &params);
  if (allocator)
    gst_object_unref (allocator);

  return TRUE;
}

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static gboolean
gst_video_encoder_propose_allocation_default (GstVideoEncoder * encoder,
    GstQuery * query)
{
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  GstCaps *caps;
  GstVideoInfo info;
  GstBufferPool *pool;
  guint size;

  gst_query_parse_allocation (query, &caps, NULL);

  if (caps == NULL)
    return FALSE;

  if (!gst_video_info_from_caps (&info, caps))
    return FALSE;

  size = GST_VIDEO_INFO_SIZE (&info);

  if (gst_query_get_n_allocation_pools (query) == 0) {
    GstStructure *structure;
    GstAllocator *allocator = NULL;
821
    GstAllocationParams params = { 0, 15, 0, 0 };
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    if (gst_query_get_n_allocation_params (query) > 0)
      gst_query_parse_nth_allocation_param (query, 0, &allocator, &params);
    else
      gst_query_add_allocation_param (query, allocator, &params);

    pool = gst_video_buffer_pool_new ();

    structure = gst_buffer_pool_get_config (pool);
    gst_buffer_pool_config_set_params (structure, caps, size, 0, 0);
    gst_buffer_pool_config_set_allocator (structure, allocator, &params);

    if (allocator)
      gst_object_unref (allocator);

    if (!gst_buffer_pool_set_config (pool, structure))
      goto config_failed;

    gst_query_add_allocation_pool (query, pool, size, 0, 0);
    gst_object_unref (pool);
    gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
  }

845
  return TRUE;
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  /* ERRORS */
config_failed:
  {
    GST_ERROR_OBJECT (encoder, "failed to set config");
    gst_object_unref (pool);
    return FALSE;
  }
854
}
855 856

static gboolean
857
gst_video_encoder_sink_query_default (GstVideoEncoder * encoder,
858 859
    GstQuery * query)
{
860
  GstPad *pad = GST_VIDEO_ENCODER_SINK_PAD (encoder);
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  gboolean res = FALSE;

  switch (GST_QUERY_TYPE (query)) {
    case GST_QUERY_CAPS:
    {
      GstCaps *filter, *caps;

      gst_query_parse_caps (query, &filter);
      caps = gst_video_encoder_sink_getcaps (encoder, filter);
      gst_query_set_caps_result (query, caps);
      gst_caps_unref (caps);
      res = TRUE;
      break;
    }
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    case GST_QUERY_ALLOCATION:
    {
      GstVideoEncoderClass *klass = GST_VIDEO_ENCODER_GET_CLASS (encoder);

      if (klass->propose_allocation)
        res = klass->propose_allocation (encoder, query);
      break;
    }
883
    default:
884
      res = gst_pad_query_default (pad, GST_OBJECT (encoder), query);
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      break;
  }
  return res;
}

890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909
static gboolean
gst_video_encoder_sink_query (GstPad * pad, GstObject * parent,
    GstQuery * query)
{
  GstVideoEncoder *encoder;
  GstVideoEncoderClass *encoder_class;
  gboolean ret = FALSE;

  encoder = GST_VIDEO_ENCODER (parent);
  encoder_class = GST_VIDEO_ENCODER_GET_CLASS (encoder);

  GST_DEBUG_OBJECT (encoder, "received query %d, %s", GST_QUERY_TYPE (query),
      GST_QUERY_TYPE_NAME (query));

  if (encoder_class->sink_query)
    ret = encoder_class->sink_query (encoder, query);

  return ret;
}

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static void
gst_video_encoder_finalize (GObject * object)
{
  GstVideoEncoder *encoder;

  GST_DEBUG_OBJECT (object, "finalize");

  encoder = GST_VIDEO_ENCODER (object);
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  g_rec_mutex_clear (&encoder->stream_lock);
919

920 921 922 923 924
  if (encoder->priv->allocator) {
    gst_object_unref (encoder->priv->allocator);
    encoder->priv->allocator = NULL;
  }

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  G_OBJECT_CLASS (parent_class)->finalize (object);
}

static gboolean
gst_video_encoder_push_event (GstVideoEncoder * encoder, GstEvent * event)
{
  switch (GST_EVENT_TYPE (event)) {
932
    case GST_EVENT_SEGMENT:
933
    {
934
      GstSegment segment;
935 936 937

      GST_VIDEO_ENCODER_STREAM_LOCK (encoder);

938
      gst_event_copy_segment (event, &segment);
939

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      GST_DEBUG_OBJECT (encoder, "segment %" GST_SEGMENT_FORMAT, &segment);

      if (segment.format != GST_FORMAT_TIME) {
        GST_DEBUG_OBJECT (encoder, "received non TIME segment");
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        GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
        break;
      }

948
      encoder->output_segment = segment;
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      GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
      break;
    }
    default:
      break;
  }

  return gst_pad_push_event (encoder->srcpad, event);
}

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static inline void
gst_video_encoder_check_and_push_tags (GstVideoEncoder * encoder)
{
  if (encoder->priv->tags && encoder->priv->tags_changed) {
    gst_video_encoder_push_event (encoder,
        gst_event_new_tag (gst_tag_list_ref (encoder->priv->tags)));
    encoder->priv->tags_changed = FALSE;
  }
}

969
static gboolean
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gst_video_encoder_sink_event_default (GstVideoEncoder * encoder,
    GstEvent * event)
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{
  GstVideoEncoderClass *encoder_class;
  gboolean ret = FALSE;

  encoder_class = GST_VIDEO_ENCODER_GET_CLASS (encoder);

  switch (GST_EVENT_TYPE (event)) {
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    case GST_EVENT_CAPS:
    {
      GstCaps *caps;

      gst_event_parse_caps (event, &caps);
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      ret = TRUE;
      encoder->priv->do_caps = TRUE;
986
      gst_event_unref (event);
987
      event = NULL;
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      break;
    }
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    case GST_EVENT_EOS:
    {
      GstFlowReturn flow_ret;

      GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
      encoder->priv->at_eos = TRUE;

      if (encoder_class->finish) {
        flow_ret = encoder_class->finish (encoder);
      } else {
        flow_ret = GST_FLOW_OK;
      }

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      if (encoder->priv->current_frame_events) {
        GList *l;

        for (l = g_list_last (encoder->priv->current_frame_events); l;
            l = g_list_previous (l)) {
          GstEvent *event = GST_EVENT (l->data);

          gst_video_encoder_push_event (encoder, event);
        }
      }
      g_list_free (encoder->priv->current_frame_events);
      encoder->priv->current_frame_events = NULL;

      gst_video_encoder_check_and_push_tags (encoder);

1018
      ret = (flow_ret == GST_FLOW_OK);
1019 1020 1021
      GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
      break;
    }
1022
    case GST_EVENT_SEGMENT:
1023
    {
1024
      GstSegment segment;
1025 1026 1027

      GST_VIDEO_ENCODER_STREAM_LOCK (encoder);

1028 1029 1030
      gst_event_copy_segment (event, &segment);

      GST_DEBUG_OBJECT (encoder, "segment %" GST_SEGMENT_FORMAT, &segment);
1031

1032
      if (segment.format != GST_FORMAT_TIME) {
1033 1034 1035 1036 1037 1038 1039
        GST_DEBUG_OBJECT (encoder, "received non TIME newsegment");
        GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
        break;
      }

      encoder->priv->at_eos = FALSE;

1040
      encoder->input_segment = segment;
1041
      ret = TRUE;
1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067
      GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
      break;
    }
    case GST_EVENT_CUSTOM_DOWNSTREAM:
    {
      if (gst_video_event_is_force_key_unit (event)) {
        GstClockTime running_time;
        gboolean all_headers;
        guint count;

        if (gst_video_event_parse_downstream_force_key_unit (event,
                NULL, NULL, &running_time, &all_headers, &count)) {
          ForcedKeyUnitEvent *fevt;

          GST_OBJECT_LOCK (encoder);
          fevt = forced_key_unit_event_new (running_time, all_headers, count);
          encoder->priv->force_key_unit =
              g_list_append (encoder->priv->force_key_unit, fevt);
          GST_OBJECT_UNLOCK (encoder);

          GST_DEBUG_OBJECT (encoder,
              "force-key-unit event: running-time %" GST_TIME_FORMAT
              ", all_headers %d, count %u",
              GST_TIME_ARGS (running_time), all_headers, count);
        }
        gst_event_unref (event);
1068
        event = NULL;
1069 1070 1071 1072
        ret = TRUE;
      }
      break;
    }
1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095
    case GST_EVENT_TAG:
    {
      GstTagList *tags;

      gst_event_parse_tag (event, &tags);

      if (gst_tag_list_get_scope (tags) == GST_TAG_SCOPE_STREAM) {
        tags = gst_tag_list_copy (tags);

        /* FIXME: make generic based on GST_TAG_FLAG_ENCODED */
        gst_tag_list_remove_tag (tags, GST_TAG_CODEC);
        gst_tag_list_remove_tag (tags, GST_TAG_AUDIO_CODEC);
        gst_tag_list_remove_tag (tags, GST_TAG_VIDEO_CODEC);
        gst_tag_list_remove_tag (tags, GST_TAG_SUBTITLE_CODEC);
        gst_tag_list_remove_tag (tags, GST_TAG_CONTAINER_FORMAT);
        gst_tag_list_remove_tag (tags, GST_TAG_BITRATE);
        gst_tag_list_remove_tag (tags, GST_TAG_NOMINAL_BITRATE);
        gst_tag_list_remove_tag (tags, GST_TAG_MAXIMUM_BITRATE);
        gst_tag_list_remove_tag (tags, GST_TAG_MINIMUM_BITRATE);
        gst_tag_list_remove_tag (tags, GST_TAG_ENCODER);
        gst_tag_list_remove_tag (tags, GST_TAG_ENCODER_VERSION);

        gst_video_encoder_merge_tags (encoder, tags, GST_TAG_MERGE_REPLACE);
1096
        gst_tag_list_unref (tags);
1097 1098 1099 1100 1101 1102
        gst_event_unref (event);
        event = NULL;
        ret = TRUE;
      }
      break;
    }
1103 1104
    case GST_EVENT_FLUSH_STOP:{
      GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
1105
      gst_video_encoder_flush (encoder);
1106 1107 1108 1109 1110 1111
      gst_segment_init (&encoder->input_segment, GST_FORMAT_TIME);
      gst_segment_init (&encoder->output_segment, GST_FORMAT_TIME);
      gst_video_encoder_reset (encoder, FALSE);
      GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
      break;
    }
1112 1113 1114 1115
    default:
      break;
  }

1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135
  /* 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 simply
   * not chain up to the parent class' event handler
   *
   * For FLUSH_STOP this is required because it is expected
   * to be forwarded immediately and no buffers are queued anyway.
   */
  if (event) {
    if (!GST_EVENT_IS_SERIALIZED (event)
        || GST_EVENT_TYPE (event) == GST_EVENT_EOS
        || GST_EVENT_TYPE (event) == GST_EVENT_FLUSH_STOP) {
      ret = gst_video_encoder_push_event (encoder, event);
    } else {
      GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
      encoder->priv->current_frame_events =
          g_list_prepend (encoder->priv->current_frame_events, event);
      GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
1136
      ret = TRUE;
1137 1138 1139
    }
  }

1140 1141 1142 1143
  return ret;
}

static gboolean
1144 1145
gst_video_encoder_sink_event (GstPad * pad, GstObject * parent,
    GstEvent * event)
1146 1147 1148 1149 1150
{
  GstVideoEncoder *enc;
  GstVideoEncoderClass *klass;
  gboolean ret = TRUE;

1151
  enc = GST_VIDEO_ENCODER (parent);
1152 1153 1154 1155 1156 1157
  klass = GST_VIDEO_ENCODER_GET_CLASS (enc);

  GST_DEBUG_OBJECT (enc, "received event %d, %s", GST_EVENT_TYPE (event),
      GST_EVENT_TYPE_NAME (event));

  if (klass->sink_event)
1158
    ret = klass->sink_event (enc, event);
1159 1160 1161 1162 1163

  return ret;
}

static gboolean
1164 1165
gst_video_encoder_src_event_default (GstVideoEncoder * encoder,
    GstEvent * event)
1166
{
1167
  gboolean ret = FALSE;
1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192

  switch (GST_EVENT_TYPE (event)) {
    case GST_EVENT_CUSTOM_UPSTREAM:
    {
      if (gst_video_event_is_force_key_unit (event)) {
        GstClockTime running_time;
        gboolean all_headers;
        guint count;

        if (gst_video_event_parse_upstream_force_key_unit (event,
                &running_time, &all_headers, &count)) {
          ForcedKeyUnitEvent *fevt;

          GST_OBJECT_LOCK (encoder);
          fevt = forced_key_unit_event_new (running_time, all_headers, count);
          encoder->priv->force_key_unit =
              g_list_append (encoder->priv->force_key_unit, fevt);
          GST_OBJECT_UNLOCK (encoder);

          GST_DEBUG_OBJECT (encoder,
              "force-key-unit event: running-time %" GST_TIME_FORMAT
              ", all_headers %d, count %u",
              GST_TIME_ARGS (running_time), all_headers, count);
        }
        gst_event_unref (event);
1193 1194
        event = NULL;
        ret = TRUE;
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      }
      break;
    }
    default:
      break;
  }

1202 1203 1204 1205 1206 1207
  if (event)
    ret =
        gst_pad_event_default (encoder->srcpad, GST_OBJECT_CAST (encoder),
        event);

  return ret;
1208 1209 1210
}

static gboolean
1211
gst_video_encoder_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
1212 1213 1214 1215 1216
{
  GstVideoEncoder *encoder;
  GstVideoEncoderClass *klass;
  gboolean ret = FALSE;

1217
  encoder = GST_VIDEO_ENCODER (parent);
1218 1219 1220 1221 1222
  klass = GST_VIDEO_ENCODER_GET_CLASS (encoder);

  GST_LOG_OBJECT (encoder, "handling event: %" GST_PTR_FORMAT, event);

  if (klass->src_event)
1223
    ret = klass->src_event (encoder, event);
1224 1225 1226 1227 1228

  return ret;
}

static gboolean
1229
gst_video_encoder_src_query_default (GstVideoEncoder * enc, GstQuery * query)
1230
{
1231
  GstPad *pad = GST_VIDEO_ENCODER_SRC_PAD (enc);
1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258
  GstVideoEncoderPrivate *priv;
  gboolean res;

  priv = enc->priv;

  GST_LOG_OBJECT (enc, "handling query: %" GST_PTR_FORMAT, query);

  switch (GST_QUERY_TYPE (query)) {
    case GST_QUERY_CONVERT:
    {
      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_video_encoded_video_convert (priv->bytes, priv->time, src_fmt,
          src_val, &dest_fmt, &dest_val);
      if (!res)
        goto error;
      gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
      break;
    }
    case GST_QUERY_LATENCY:
    {
      gboolean live;
      GstClockTime min_latency, max_latency;

1259
      res = gst_pad_peer_query (enc->sinkpad, query);
1260 1261 1262 1263 1264 1265 1266 1267
      if (res) {
        gst_query_parse_latency (query, &live, &min_latency, &max_latency);
        GST_DEBUG_OBJECT (enc, "Peer latency: live %d, min %"
            GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live,
            GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));

        GST_OBJECT_LOCK (enc);
        min_latency += priv->min_latency;
1268 1269 1270 1271
        if (enc->priv->max_latency == GST_CLOCK_TIME_NONE) {
          max_latency = GST_CLOCK_TIME_NONE;
        } else if (max_latency != GST_CLOCK_TIME_NONE) {
          max_latency += enc->priv->max_latency;
1272 1273 1274 1275 1276 1277 1278 1279
        }
        GST_OBJECT_UNLOCK (enc);

        gst_query_set_latency (query, live, min_latency, max_latency);
      }
    }
      break;
    default:
1280
      res = gst_pad_query_default (pad, GST_OBJECT (enc), query);
1281 1282 1283 1284 1285 1286 1287 1288
  }
  return res;

error:
  GST_DEBUG_OBJECT (enc, "query failed");
  return res;
}

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static gboolean
gst_video_encoder_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
  GstVideoEncoder *encoder;
  GstVideoEncoderClass *encoder_class;
  gboolean ret = FALSE;

  encoder = GST_VIDEO_ENCODER (parent);
  encoder_class = GST_VIDEO_ENCODER_GET_CLASS (encoder);

  GST_DEBUG_OBJECT (encoder, "received query %d, %s", GST_QUERY_TYPE (query),
      GST_QUERY_TYPE_NAME (query));

  if (encoder_class->src_query)
    ret = encoder_class->src_query (encoder, query);

  return ret;
}

1308 1309
static GstVideoCodecFrame *
gst_video_encoder_new_frame (GstVideoEncoder * encoder, GstBuffer * buf,
1310
    GstClockTime pts, GstClockTime dts, GstClockTime duration)
1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329
{
  GstVideoEncoderPrivate *priv = encoder->priv;
  GstVideoCodecFrame *frame;

  frame = g_slice_new0 (GstVideoCodecFrame);

  frame->ref_count = 1;

  GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
  frame->system_frame_number = priv->system_frame_number;
  priv->system_frame_number++;

  frame->presentation_frame_number = priv->presentation_frame_number;
  priv->presentation_frame_number++;
  GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);

  frame->events = priv->current_frame_events;
  priv->current_frame_events = NULL;
  frame->input_buffer = buf;
1330 1331
  frame->pts = pts;
  frame->dts = dts;
1332
  frame->duration = duration;
1333
  frame->abidata.ABI.ts = pts;
1334 1335 1336 1337 1338 1339

  return frame;
}


static GstFlowReturn
1340
gst_video_encoder_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
1341 1342 1343 1344 1345
{
  GstVideoEncoder *encoder;
  GstVideoEncoderPrivate *priv;
  GstVideoEncoderClass *klass;
  GstVideoCodecFrame *frame;
1346
  GstClockTime pts, duration;
1347
  GstFlowReturn ret = GST_FLOW_OK;
1348
  guint64 start, stop, cstart, cstop;
1349

1350
  encoder = GST_VIDEO_ENCODER (parent);
1351 1352 1353 1354 1355
  priv = encoder->priv;
  klass = GST_VIDEO_ENCODER_GET_CLASS (encoder);

  g_return_val_if_fail (klass->handle_frame != NULL, GST_FLOW_ERROR);

1356 1357 1358 1359 1360 1361 1362 1363
  if (G_UNLIKELY (encoder->priv->do_caps)) {
    GstCaps *caps = gst_pad_get_current_caps (encoder->sinkpad);
    if (!caps)
      goto not_negotiated;
    if (!gst_video_encoder_setcaps (encoder, caps)) {
      gst_caps_unref (caps);
      goto not_negotiated;
    }
1364
    gst_caps_unref (caps);
1365 1366 1367
    encoder->priv->do_caps = FALSE;
  }

1368 1369 1370
  if (!encoder->priv->input_state)
    goto not_negotiated;

1371 1372
  GST_VIDEO_ENCODER_STREAM_LOCK (encoder);

1373 1374
  pts = GST_BUFFER_PTS (buf);
  duration = GST_BUFFER_DURATION (buf);
1375 1376

  GST_LOG_OBJECT (encoder,
1377
      "received buffer of size %" G_GSIZE_FORMAT " with PTS %" GST_TIME_FORMAT
1378
      ", DTS %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
1379 1380
      gst_buffer_get_size (buf), GST_TIME_ARGS (pts),
      GST_TIME_ARGS (GST_BUFFER_DTS (buf)), GST_TIME_ARGS (duration));
1381 1382

  if (priv->at_eos) {
1383
    ret = GST_FLOW_EOS;
1384 1385 1386
    goto done;
  }