/* GStreamer * Copyright (C) 2008 David Schleef * Copyright (C) 2011 Mark Nauwelaerts . * Copyright (C) 2011 Nokia Corporation. All rights reserved. * Contact: Stefan Kost * Copyright (C) 2012 Collabora Ltd. * Author : Edward Hervey * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ /** * 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. * * * Configuration * * Initially, GstVideoEncoder calls @start when the encoder element * is activated, which allows subclass to perform any global setup. * * * 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. * * * GstVideoEncoder calls @stop at end of all processing. * * * * * * Data processing * * Base class collects input data and metadata into a frame and hands * this to subclass' @handle_frame. * * * If codec processing results in encoded data, subclass should call * @gst_video_encoder_finish_frame to have encoded data pushed * downstream. * * * 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. * * * GstVideoEncoderClass will handle both srcpad and sinkpad events. * Sink events will be passed to subclass if @event callback has been * provided. * * * * * Shutdown phase * * GstVideoEncoder class calls @stop to inform the subclass that data * parsing will be stopped. * * * * * * Subclass is responsible for providing pad template caps for * source and sink pads. The pads need to be named "sink" and "src". It 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: * * Provide pad templates * * Provide source pad caps before pushing the first buffer * * * Accept data in @handle_frame and provide encoded results to * @gst_video_encoder_finish_frame. * * * */ #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 */ #include #include "gstvideoencoder.h" #include "gstvideoutils.h" #include #include #include 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; gboolean do_caps; 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 */ guint32 system_frame_number; GList *frames; /* Protected with OBJECT_LOCK */ GstVideoCodecState *input_state; GstVideoCodecState *output_state; gboolean output_state_changed; gint64 bytes; gint64 time; GstAllocator *allocator; GstAllocationParams params; GstTagList *tags; gboolean tags_changed; }; typedef struct _ForcedKeyUnitEvent ForcedKeyUnitEvent; struct _ForcedKeyUnitEvent { GstClockTime running_time; gboolean pending; /* TRUE if this was requested already */ gboolean all_headers; guint count; guint32 frame_id; }; 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; } static GstElementClass *parent_class = NULL; static void gst_video_encoder_class_init (GstVideoEncoderClass * klass); static void gst_video_encoder_init (GstVideoEncoder * enc, GstVideoEncoderClass * klass); static void gst_video_encoder_finalize (GObject * object); 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); static GstStateChangeReturn gst_video_encoder_change_state (GstElement * element, GstStateChange transition); 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); static GstVideoCodecFrame *gst_video_encoder_new_frame (GstVideoEncoder * encoder, GstBuffer * buf, GstClockTime pts, GstClockTime dts, GstClockTime duration); static gboolean gst_video_encoder_sink_event_default (GstVideoEncoder * encoder, GstEvent * event); static gboolean gst_video_encoder_src_event_default (GstVideoEncoder * encoder, GstEvent * event); static gboolean gst_video_encoder_decide_allocation_default (GstVideoEncoder * encoder, GstQuery * query); static gboolean gst_video_encoder_propose_allocation_default (GstVideoEncoder * encoder, GstQuery * query); static gboolean gst_video_encoder_negotiate_default (GstVideoEncoder * encoder); static gboolean gst_video_encoder_negotiate_unlocked (GstVideoEncoder * encoder); static gboolean gst_video_encoder_sink_query_default (GstVideoEncoder * encoder, GstQuery * query); static gboolean gst_video_encoder_src_query_default (GstVideoEncoder * encoder, GstQuery * query); /* 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) { 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; } 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); GST_DEBUG_CATEGORY_INIT (videoencoder_debug, "videoencoder", 0, "Base Video Encoder"); parent_class = g_type_class_peek_parent (klass); 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); klass->sink_event = gst_video_encoder_sink_event_default; klass->src_event = gst_video_encoder_src_event_default; klass->propose_allocation = gst_video_encoder_propose_allocation_default; klass->decide_allocation = gst_video_encoder_decide_allocation_default; klass->negotiate = gst_video_encoder_negotiate_default; klass->sink_query = gst_video_encoder_sink_query_default; klass->src_query = gst_video_encoder_src_query_default; } static gboolean gst_video_encoder_reset (GstVideoEncoder * encoder, gboolean hard) { GstVideoEncoderPrivate *priv = encoder->priv; gboolean ret = TRUE; 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; g_list_foreach (priv->current_frame_events, (GFunc) gst_event_unref, NULL); g_list_free (priv->current_frame_events); priv->current_frame_events = NULL; g_list_foreach (priv->frames, (GFunc) gst_video_codec_frame_unref, NULL); g_list_free (priv->frames); priv->frames = NULL; priv->bytes = 0; priv->time = 0; 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; if (priv->allocator) { gst_object_unref (priv->allocator); priv->allocator = NULL; } } GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); return ret; } /* 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; } 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)); gst_pad_set_query_function (pad, GST_DEBUG_FUNCPTR (gst_video_encoder_sink_query)); 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); g_rec_mutex_init (&encoder->stream_lock); priv->at_eos = FALSE; priv->headers = NULL; priv->new_headers = FALSE; gst_video_encoder_reset (encoder, TRUE); } 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 gst_video_encoder_setcaps (GstVideoEncoder * encoder, GstCaps * caps) { 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); 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; } state = _new_input_state (caps); if (G_UNLIKELY (!state)) goto parse_fail; 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; } if (encoder_class->reset) { GST_FIXME_OBJECT (encoder, "GstVideoEncoder::reset() is deprecated"); ret = encoder_class->reset (encoder, TRUE); } /* 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; } 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; caps_not_changed: { GST_DEBUG_OBJECT (encoder, "Caps did not change - ignore"); GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); return TRUE; } /* ERRORS */ parse_fail: { GST_WARNING_OBJECT (encoder, "Failed to parse caps"); GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); return FALSE; } } /** * gst_video_encoder_proxy_getcaps: * @enc: a #GstVideoEncoder * @caps: initial caps * @filter: filter caps * * 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 * gst_video_encoder_proxy_getcaps (GstVideoEncoder * encoder, GstCaps * caps, GstCaps * filter) { GstCaps *templ_caps; 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 */ templ_caps = caps ? gst_caps_ref (caps) : gst_pad_get_pad_template_caps (encoder->sinkpad); allowed = gst_pad_get_allowed_caps (encoder->srcpad); if (!allowed || gst_caps_is_empty (allowed) || gst_caps_is_any (allowed)) { fcaps = templ_caps; 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; s = gst_structure_new_id_empty (q_name); 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); filter_caps = gst_caps_merge_structure (filter_caps, s); } } fcaps = gst_caps_intersect (filter_caps, templ_caps); gst_caps_unref (filter_caps); 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; } done: gst_caps_replace (&allowed, NULL); GST_LOG_OBJECT (encoder, "proxy caps %" GST_PTR_FORMAT, fcaps); return fcaps; } static GstCaps * gst_video_encoder_sink_getcaps (GstVideoEncoder * encoder, GstCaps * filter) { GstVideoEncoderClass *klass; GstCaps *caps; klass = GST_VIDEO_ENCODER_GET_CLASS (encoder); if (klass->getcaps) caps = klass->getcaps (encoder, filter); else caps = gst_video_encoder_proxy_getcaps (encoder, NULL, filter); GST_LOG_OBJECT (encoder, "Returning caps %" GST_PTR_FORMAT, caps); return caps; } 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, ¶ms); update_allocator = TRUE; } else { allocator = NULL; gst_allocation_params_init (¶ms); update_allocator = FALSE; } if (update_allocator) gst_query_set_nth_allocation_param (query, 0, allocator, ¶ms); else gst_query_add_allocation_param (query, allocator, ¶ms); if (allocator) gst_object_unref (allocator); return TRUE; } static gboolean gst_video_encoder_propose_allocation_default (GstVideoEncoder * encoder, GstQuery * query) { 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; GstAllocationParams params = { 0, 15, 0, 0 }; if (gst_query_get_n_allocation_params (query) > 0) gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms); else gst_query_add_allocation_param (query, allocator, ¶ms); 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, ¶ms); 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); } return TRUE; /* ERRORS */ config_failed: { GST_ERROR_OBJECT (encoder, "failed to set config"); gst_object_unref (pool); return FALSE; } } static gboolean gst_video_encoder_sink_query_default (GstVideoEncoder * encoder, GstQuery * query) { GstPad *pad = GST_VIDEO_ENCODER_SINK_PAD (encoder); 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; } case GST_QUERY_ALLOCATION: { GstVideoEncoderClass *klass = GST_VIDEO_ENCODER_GET_CLASS (encoder); if (klass->propose_allocation) res = klass->propose_allocation (encoder, query); break; } default: res = gst_pad_query_default (pad, GST_OBJECT (encoder), query); break; } return res; } 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; } static void gst_video_encoder_finalize (GObject * object) { GstVideoEncoder *encoder; GST_DEBUG_OBJECT (object, "finalize"); encoder = GST_VIDEO_ENCODER (object); g_rec_mutex_clear (&encoder->stream_lock); if (encoder->priv->allocator) { gst_object_unref (encoder->priv->allocator); encoder->priv->allocator = NULL; } G_OBJECT_CLASS (parent_class)->finalize (object); } static gboolean gst_video_encoder_push_event (GstVideoEncoder * encoder, GstEvent * event) { switch (GST_EVENT_TYPE (event)) { case GST_EVENT_SEGMENT: { GstSegment segment; GST_VIDEO_ENCODER_STREAM_LOCK (encoder); gst_event_copy_segment (event, &segment); GST_DEBUG_OBJECT (encoder, "segment %" GST_SEGMENT_FORMAT, &segment); if (segment.format != GST_FORMAT_TIME) { GST_DEBUG_OBJECT (encoder, "received non TIME segment"); GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); break; } encoder->output_segment = segment; GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); break; } default: break; } return gst_pad_push_event (encoder->srcpad, event); } 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; } } static gboolean gst_video_encoder_sink_event_default (GstVideoEncoder * encoder, GstEvent * event) { GstVideoEncoderClass *encoder_class; gboolean ret = FALSE; encoder_class = GST_VIDEO_ENCODER_GET_CLASS (encoder); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_CAPS: { GstCaps *caps; gst_event_parse_caps (event, &caps); ret = TRUE; encoder->priv->do_caps = TRUE; gst_event_unref (event); event = NULL; break; } 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; } 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); ret = (flow_ret == GST_FLOW_OK); GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); break; } case GST_EVENT_SEGMENT: { GstSegment segment; GST_VIDEO_ENCODER_STREAM_LOCK (encoder); gst_event_copy_segment (event, &segment); GST_DEBUG_OBJECT (encoder, "segment %" GST_SEGMENT_FORMAT, &segment); if (segment.format != GST_FORMAT_TIME) { GST_DEBUG_OBJECT (encoder, "received non TIME newsegment"); GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); break; } encoder->priv->at_eos = FALSE; encoder->input_segment = segment; ret = TRUE; 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); event = NULL; ret = TRUE; } break; } 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); gst_tag_list_unref (tags); gst_event_unref (event); event = NULL; ret = TRUE; } break; } case GST_EVENT_FLUSH_STOP:{ GST_VIDEO_ENCODER_STREAM_LOCK (encoder); gst_video_encoder_flush (encoder); 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; } default: break; } /* 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); ret = TRUE; } } return ret; } static gboolean gst_video_encoder_sink_event (GstPad * pad, GstObject * parent, GstEvent * event) { GstVideoEncoder *enc; GstVideoEncoderClass *klass; gboolean ret = TRUE; enc = GST_VIDEO_ENCODER (parent); 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) ret = klass->sink_event (enc, event); return ret; } static gboolean gst_video_encoder_src_event_default (GstVideoEncoder * encoder, GstEvent * event) { gboolean ret = FALSE; 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); event = NULL; ret = TRUE; } break; } default: break; } if (event) ret = gst_pad_event_default (encoder->srcpad, GST_OBJECT_CAST (encoder), event); return ret; } static gboolean gst_video_encoder_src_event (GstPad * pad, GstObject * parent, GstEvent * event) { GstVideoEncoder *encoder; GstVideoEncoderClass *klass; gboolean ret = FALSE; encoder = GST_VIDEO_ENCODER (parent); klass = GST_VIDEO_ENCODER_GET_CLASS (encoder); GST_LOG_OBJECT (encoder, "handling event: %" GST_PTR_FORMAT, event); if (klass->src_event) ret = klass->src_event (encoder, event); return ret; } static gboolean gst_video_encoder_src_query_default (GstVideoEncoder * enc, GstQuery * query) { GstPad *pad = GST_VIDEO_ENCODER_SRC_PAD (enc); 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; res = gst_pad_peer_query (enc->sinkpad, query); if (res) { gst_query_parse_latency (query, &live, &min_latency, &max_latency); GST_DEBUG_OBJECT (enc, "Peer latency: live %d, min %" GST_TIME_FORMAT " max %" GST_TIME_FORMAT, live, GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency)); GST_OBJECT_LOCK (enc); min_latency += priv->min_latency; 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; } GST_OBJECT_UNLOCK (enc); gst_query_set_latency (query, live, min_latency, max_latency); } } break; default: res = gst_pad_query_default (pad, GST_OBJECT (enc), query); } return res; error: GST_DEBUG_OBJECT (enc, "query failed"); return res; } 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; } static GstVideoCodecFrame * gst_video_encoder_new_frame (GstVideoEncoder * encoder, GstBuffer * buf, GstClockTime pts, GstClockTime dts, GstClockTime duration) { 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; frame->pts = pts; frame->dts = dts; frame->duration = duration; frame->abidata.ABI.ts = pts; return frame; } static GstFlowReturn gst_video_encoder_chain (GstPad * pad, GstObject * parent, GstBuffer * buf) { GstVideoEncoder *encoder; GstVideoEncoderPrivate *priv; GstVideoEncoderClass *klass; GstVideoCodecFrame *frame; GstClockTime pts, duration; GstFlowReturn ret = GST_FLOW_OK; guint64 start, stop, cstart, cstop; encoder = GST_VIDEO_ENCODER (parent); priv = encoder->priv; klass = GST_VIDEO_ENCODER_GET_CLASS (encoder); g_return_val_if_fail (klass->handle_frame != NULL, GST_FLOW_ERROR); 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; } gst_caps_unref (caps); encoder->priv->do_caps = FALSE; } if (!encoder->priv->input_state) goto not_negotiated; GST_VIDEO_ENCODER_STREAM_LOCK (encoder); pts = GST_BUFFER_PTS (buf); duration = GST_BUFFER_DURATION (buf); GST_LOG_OBJECT (encoder, "received buffer of size %" G_GSIZE_FORMAT " with PTS %" GST_TIME_FORMAT ", DTS %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT, gst_buffer_get_size (buf), GST_TIME_ARGS (pts), GST_TIME_ARGS (GST_BUFFER_DTS (buf)), GST_TIME_ARGS (duration)); if (priv->at_eos) { ret = GST_FLOW_EOS; goto done; } start = pts; if (GST_CLOCK_TIME_IS_VALID (duration)) stop = start + duration; else stop = GST_CLOCK_TIME_NONE; /* Drop buffers outside of segment */ if (!gst_segment_clip (&encoder->input_segment, GST_FORMAT_TIME, start, stop, &cstart, &cstop)) { GST_DEBUG_OBJECT (encoder, "clipping to segment dropped frame"); gst_buffer_unref (buf); goto done; } if (GST_CLOCK_TIME_IS_VALID (cstop)) duration = cstop - cstart; else duration = GST_CLOCK_TIME_NONE; /* incoming DTS is not really relevant and does not make sense anyway, * so pass along _NONE and maybe come up with something better later on */ frame = gst_video_encoder_new_frame (encoder, buf, cstart, GST_CLOCK_TIME_NONE, duration); GST_OBJECT_LOCK (encoder); if (priv->force_key_unit) { ForcedKeyUnitEvent *fevt = NULL; GstClockTime running_time; GList *l; running_time = gst_segment_to_running_time (&encoder->output_segment, GST_FORMAT_TIME, cstart); for (l = priv->force_key_unit; l; l = l->next) { ForcedKeyUnitEvent *tmp = l->data; /* Skip pending keyunits */ if (tmp->pending) continue; /* Simple case, keyunit ASAP */ if (tmp->running_time == GST_CLOCK_TIME_NONE) { fevt = tmp; break; } /* Event for before this frame */ if (tmp->running_time <= running_time) { fevt = tmp; break; } } if (fevt) { fevt->frame_id = frame->system_frame_number; GST_DEBUG_OBJECT (encoder, "Forcing a key unit at running time %" GST_TIME_FORMAT, GST_TIME_ARGS (running_time)); GST_VIDEO_CODEC_FRAME_SET_FORCE_KEYFRAME (frame); if (fevt->all_headers) GST_VIDEO_CODEC_FRAME_SET_FORCE_KEYFRAME_HEADERS (frame); fevt->pending = TRUE; } } GST_OBJECT_UNLOCK (encoder); gst_video_codec_frame_ref (frame); priv->frames = g_list_append (priv->frames, frame); /* new data, more finish needed */ priv->drained = FALSE; GST_LOG_OBJECT (encoder, "passing frame pfn %d to subclass", frame->presentation_frame_number); ret = klass->handle_frame (encoder, frame); done: GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); return ret; /* ERRORS */ not_negotiated: { GST_ELEMENT_ERROR (encoder, CORE, NEGOTIATION, (NULL), ("encoder not initialized")); gst_buffer_unref (buf); return GST_FLOW_NOT_NEGOTIATED; } } static GstStateChangeReturn gst_video_encoder_change_state (GstElement * element, GstStateChange transition) { GstVideoEncoder *encoder; GstVideoEncoderClass *encoder_class; GstStateChangeReturn ret; encoder = GST_VIDEO_ENCODER (element); encoder_class = GST_VIDEO_ENCODER_GET_CLASS (element); switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: /* open device/library if needed */ if (encoder_class->open && !encoder_class->open (encoder)) goto open_failed; break; case GST_STATE_CHANGE_READY_TO_PAUSED: /* Initialize device/library if needed */ if (encoder_class->start && !encoder_class->start (encoder)) goto start_failed; GST_VIDEO_ENCODER_STREAM_LOCK (encoder); gst_video_encoder_reset (encoder, TRUE); GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: GST_VIDEO_ENCODER_STREAM_LOCK (encoder); gst_video_encoder_reset (encoder, TRUE); GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); if (encoder_class->stop && !encoder_class->stop (encoder)) goto stop_failed; break; case GST_STATE_CHANGE_READY_TO_NULL: /* close device/library if needed */ if (encoder_class->close && !encoder_class->close (encoder)) goto close_failed; break; default: break; } return ret; /* Errors */ open_failed: { GST_ELEMENT_ERROR (encoder, LIBRARY, INIT, (NULL), ("Failed to open encoder")); return GST_STATE_CHANGE_FAILURE; } start_failed: { GST_ELEMENT_ERROR (encoder, LIBRARY, INIT, (NULL), ("Failed to start encoder")); return GST_STATE_CHANGE_FAILURE; } stop_failed: { GST_ELEMENT_ERROR (encoder, LIBRARY, INIT, (NULL), ("Failed to stop encoder")); return GST_STATE_CHANGE_FAILURE; } close_failed: { GST_ELEMENT_ERROR (encoder, LIBRARY, INIT, (NULL), ("Failed to close encoder")); return GST_STATE_CHANGE_FAILURE; } } static gboolean gst_video_encoder_negotiate_default (GstVideoEncoder * encoder) { GstVideoEncoderClass *klass = GST_VIDEO_ENCODER_GET_CLASS (encoder); GstAllocator *allocator; GstAllocationParams params; gboolean ret = TRUE; GstVideoCodecState *state = encoder->priv->output_state; GstVideoInfo *info = &state->info; GstQuery *query = NULL; GstVideoCodecFrame *frame; GstCaps *prevcaps; g_return_val_if_fail (state->caps != NULL, FALSE); if (encoder->priv->output_state_changed) { state->caps = gst_caps_make_writable (state->caps); /* Fill caps */ gst_caps_set_simple (state->caps, "width", G_TYPE_INT, info->width, "height", G_TYPE_INT, info->height, "pixel-aspect-ratio", GST_TYPE_FRACTION, info->par_n, info->par_d, NULL); if (info->flags & GST_VIDEO_FLAG_VARIABLE_FPS && info->fps_n != 0) { /* variable fps with a max-framerate */ gst_caps_set_simple (state->caps, "framerate", GST_TYPE_FRACTION, 0, 1, "max-framerate", GST_TYPE_FRACTION, info->fps_n, info->fps_d, NULL); } else { /* no variable fps or no max-framerate */ gst_caps_set_simple (state->caps, "framerate", GST_TYPE_FRACTION, info->fps_n, info->fps_d, NULL); } if (state->codec_data) gst_caps_set_simple (state->caps, "codec_data", GST_TYPE_BUFFER, state->codec_data, NULL); encoder->priv->output_state_changed = FALSE; } /* Push all pending pre-caps events of the oldest frame before * setting caps */ frame = encoder->priv->frames ? encoder->priv->frames->data : NULL; if (frame || encoder->priv->current_frame_events) { GList **events, *l; if (frame) { events = &frame->events; } else { events = &encoder->priv->current_frame_events; } for (l = g_list_last (*events); l;) { GstEvent *event = GST_EVENT (l->data); GList *tmp; if (GST_EVENT_TYPE (event) < GST_EVENT_CAPS) { gst_video_encoder_push_event (encoder, event); tmp = l; l = l->prev; *events = g_list_delete_link (*events, tmp); } else { l = l->prev; } } } prevcaps = gst_pad_get_current_caps (encoder->srcpad); if (!prevcaps || !gst_caps_is_equal (prevcaps, state->caps)) ret = gst_pad_set_caps (encoder->srcpad, state->caps); else ret = TRUE; if (prevcaps) gst_caps_unref (prevcaps); if (!ret) goto done; query = gst_query_new_allocation (state->caps, TRUE); if (!gst_pad_peer_query (encoder->srcpad, query)) { GST_DEBUG_OBJECT (encoder, "didn't get downstream ALLOCATION hints"); } g_assert (klass->decide_allocation != NULL); ret = klass->decide_allocation (encoder, query); GST_DEBUG_OBJECT (encoder, "ALLOCATION (%d) params: %" GST_PTR_FORMAT, ret, query); if (!ret) goto no_decide_allocation; /* we got configuration from our peer or the decide_allocation method, * parse them */ if (gst_query_get_n_allocation_params (query) > 0) { gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms); } else { allocator = NULL; gst_allocation_params_init (¶ms); } if (encoder->priv->allocator) gst_object_unref (encoder->priv->allocator); encoder->priv->allocator = allocator; encoder->priv->params = params; done: if (query) gst_query_unref (query); return ret; /* Errors */ no_decide_allocation: { GST_WARNING_OBJECT (encoder, "Subclass failed to decide allocation"); goto done; } } static gboolean gst_video_encoder_negotiate_unlocked (GstVideoEncoder * encoder) { GstVideoEncoderClass *klass = GST_VIDEO_ENCODER_GET_CLASS (encoder); gboolean ret = TRUE; if (G_LIKELY (klass->negotiate)) ret = klass->negotiate (encoder); return ret; } /** * gst_video_encoder_negotiate: * @encoder: a #GstVideoEncoder * * Negotiate with downstream elements to currently configured #GstVideoCodecState. * Unmark GST_PAD_FLAG_NEED_RECONFIGURE in any case. But mark it again if * negotiate fails. * * Returns: #TRUE if the negotiation succeeded, else #FALSE. */ gboolean gst_video_encoder_negotiate (GstVideoEncoder * encoder) { GstVideoEncoderClass *klass; gboolean ret = TRUE; g_return_val_if_fail (GST_IS_VIDEO_ENCODER (encoder), FALSE); g_return_val_if_fail (encoder->priv->output_state, FALSE); klass = GST_VIDEO_ENCODER_GET_CLASS (encoder); GST_VIDEO_ENCODER_STREAM_LOCK (encoder); gst_pad_check_reconfigure (encoder->srcpad); if (klass->negotiate) { ret = klass->negotiate (encoder); if (!ret) gst_pad_mark_reconfigure (encoder->srcpad); } GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); return ret; } /** * gst_video_encoder_allocate_output_buffer: * @encoder: a #GstVideoEncoder * @size: size of the buffer * * Helper function that allocates a buffer to hold an encoded video frame * for @encoder's current #GstVideoCodecState. * * Returns: (transfer full): allocated buffer */ GstBuffer * gst_video_encoder_allocate_output_buffer (GstVideoEncoder * encoder, gsize size) { GstBuffer *buffer; gboolean needs_reconfigure = FALSE; g_return_val_if_fail (size > 0, NULL); GST_DEBUG ("alloc src buffer"); GST_VIDEO_ENCODER_STREAM_LOCK (encoder); needs_reconfigure = gst_pad_check_reconfigure (encoder->srcpad); if (G_UNLIKELY (encoder->priv->output_state_changed || (encoder->priv->output_state && needs_reconfigure))) { if (!gst_video_encoder_negotiate_unlocked (encoder)) { GST_DEBUG_OBJECT (encoder, "Failed to negotiate, fallback allocation"); gst_pad_mark_reconfigure (encoder->srcpad); goto fallback; } } buffer = gst_buffer_new_allocate (encoder->priv->allocator, size, &encoder->priv->params); if (!buffer) { GST_INFO_OBJECT (encoder, "couldn't allocate output buffer"); goto fallback; } GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); return buffer; fallback: buffer = gst_buffer_new_allocate (NULL, size, NULL); GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); return buffer; } /** * gst_video_encoder_allocate_output_frame: * @encoder: a #GstVideoEncoder * @frame: a #GstVideoCodecFrame * @size: size of the buffer * * Helper function that allocates a buffer to hold an encoded video frame for @encoder's * current #GstVideoCodecState. Subclass should already have configured video * state and set src pad caps. * * The buffer allocated here is owned by the frame and you should only * keep references to the frame, not the buffer. * * Returns: %GST_FLOW_OK if an output buffer could be allocated */ GstFlowReturn gst_video_encoder_allocate_output_frame (GstVideoEncoder * encoder, GstVideoCodecFrame * frame, gsize size) { gboolean needs_reconfigure = FALSE; g_return_val_if_fail (frame->output_buffer == NULL, GST_FLOW_ERROR); GST_VIDEO_ENCODER_STREAM_LOCK (encoder); needs_reconfigure = gst_pad_check_reconfigure (encoder->srcpad); if (G_UNLIKELY (encoder->priv->output_state_changed || (encoder->priv->output_state && needs_reconfigure))) { if (!gst_video_encoder_negotiate_unlocked (encoder)) { GST_DEBUG_OBJECT (encoder, "Failed to negotiate, fallback allocation"); gst_pad_mark_reconfigure (encoder->srcpad); } } GST_LOG_OBJECT (encoder, "alloc buffer size %" G_GSIZE_FORMAT, size); frame->output_buffer = gst_buffer_new_allocate (encoder->priv->allocator, size, &encoder->priv->params); GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); return frame->output_buffer ? GST_FLOW_OK : GST_FLOW_ERROR; } static void gst_video_encoder_release_frame (GstVideoEncoder * enc, GstVideoCodecFrame * frame) { GList *link; /* unref once from the list */ link = g_list_find (enc->priv->frames, frame); if (link) { gst_video_codec_frame_unref (frame); enc->priv->frames = g_list_delete_link (enc->priv->frames, link); } /* unref because this function takes ownership */ gst_video_codec_frame_unref (frame); } /** * gst_video_encoder_finish_frame: * @encoder: a #GstVideoEncoder * @frame: (transfer full): an encoded #GstVideoCodecFrame * * @frame must have a valid encoded data buffer, whose metadata fields * are then appropriately set according to frame data or no buffer at * all if the frame should be dropped. * It is subsequently pushed downstream or provided to @pre_push. * In any case, the frame is considered finished and released. * * After calling this function the output buffer of the frame is to be * considered read-only. This function will also change the metadata * of the buffer. * * Returns: a #GstFlowReturn resulting from sending data downstream */ GstFlowReturn gst_video_encoder_finish_frame (GstVideoEncoder * encoder, GstVideoCodecFrame * frame) { GstVideoEncoderPrivate *priv = encoder->priv; GstFlowReturn ret = GST_FLOW_OK; GstVideoEncoderClass *encoder_class; GList *l; gboolean send_headers = FALSE; gboolean discont = (frame->presentation_frame_number == 0); GstBuffer *buffer; gboolean needs_reconfigure = FALSE; encoder_class = GST_VIDEO_ENCODER_GET_CLASS (encoder); GST_LOG_OBJECT (encoder, "finish frame fpn %d", frame->presentation_frame_number); GST_LOG_OBJECT (encoder, "frame PTS %" GST_TIME_FORMAT ", DTS %" GST_TIME_FORMAT, GST_TIME_ARGS (frame->pts), GST_TIME_ARGS (frame->dts)); GST_VIDEO_ENCODER_STREAM_LOCK (encoder); needs_reconfigure = gst_pad_check_reconfigure (encoder->srcpad); if (G_UNLIKELY (priv->output_state_changed || (priv->output_state && needs_reconfigure))) { if (!gst_video_encoder_negotiate_unlocked (encoder)) { gst_pad_mark_reconfigure (encoder->srcpad); if (GST_PAD_IS_FLUSHING (encoder->srcpad)) ret = GST_FLOW_FLUSHING; else ret = GST_FLOW_NOT_NEGOTIATED; goto done; } } if (G_UNLIKELY (priv->output_state == NULL)) goto no_output_state; /* Push all pending events that arrived before this frame */ for (l = priv->frames; l; l = l->next) { GstVideoCodecFrame *tmp = l->data; if (tmp->events) { GList *k; for (k = g_list_last (tmp->events); k; k = k->prev) gst_video_encoder_push_event (encoder, k->data); g_list_free (tmp->events); tmp->events = NULL; } if (tmp == frame) break; } gst_video_encoder_check_and_push_tags (encoder); /* no buffer data means this frame is skipped/dropped */ if (!frame->output_buffer) { GST_DEBUG_OBJECT (encoder, "skipping frame %" GST_TIME_FORMAT, GST_TIME_ARGS (frame->pts)); goto done; } if (GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT (frame) && priv->force_key_unit) { GstClockTime stream_time, running_time; GstEvent *ev; ForcedKeyUnitEvent *fevt = NULL; GList *l; running_time = gst_segment_to_running_time (&encoder->output_segment, GST_FORMAT_TIME, frame->pts); GST_OBJECT_LOCK (encoder); for (l = priv->force_key_unit; l; l = l->next) { ForcedKeyUnitEvent *tmp = l->data; /* Skip non-pending keyunits */ if (!tmp->pending) continue; /* Exact match using the frame id */ if (frame->system_frame_number == tmp->frame_id) { fevt = tmp; break; } /* Simple case, keyunit ASAP */ if (tmp->running_time == GST_CLOCK_TIME_NONE) { fevt = tmp; break; } /* Event for before this frame */ if (tmp->running_time <= running_time) { fevt = tmp; break; } } if (fevt) { priv->force_key_unit = g_list_remove (priv->force_key_unit, fevt); } GST_OBJECT_UNLOCK (encoder); if (fevt) { stream_time = gst_segment_to_stream_time (&encoder->output_segment, GST_FORMAT_TIME, frame->pts); ev = gst_video_event_new_downstream_force_key_unit (frame->pts, stream_time, running_time, fevt->all_headers, fevt->count); gst_video_encoder_push_event (encoder, ev); if (fevt->all_headers) send_headers = TRUE; GST_DEBUG_OBJECT (encoder, "Forced key unit: running-time %" GST_TIME_FORMAT ", all_headers %d, count %u", GST_TIME_ARGS (running_time), fevt->all_headers, fevt->count); forced_key_unit_event_free (fevt); } } if (GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT (frame)) { priv->distance_from_sync = 0; GST_BUFFER_FLAG_UNSET (frame->output_buffer, GST_BUFFER_FLAG_DELTA_UNIT); /* For keyframes, DTS = PTS */ if (!GST_CLOCK_TIME_IS_VALID (frame->dts)) { frame->dts = frame->pts; } else if (GST_CLOCK_TIME_IS_VALID (frame->pts) && frame->pts != frame->dts) { GST_WARNING_OBJECT (encoder, "keyframe PTS != DTS"); } } else { GST_BUFFER_FLAG_SET (frame->output_buffer, GST_BUFFER_FLAG_DELTA_UNIT); } /* DTS is expected monotone ascending, * so a good guess is the lowest unsent PTS (all being OK) */ { GstClockTime min_ts = GST_CLOCK_TIME_NONE; GstVideoCodecFrame *oframe = NULL; gboolean seen_none = FALSE; /* some maintenance regardless */ for (l = priv->frames; l; l = l->next) { GstVideoCodecFrame *tmp = l->data; if (!GST_CLOCK_TIME_IS_VALID (tmp->abidata.ABI.ts)) { seen_none = TRUE; continue; } if (!GST_CLOCK_TIME_IS_VALID (min_ts) || tmp->abidata.ABI.ts < min_ts) { min_ts = tmp->abidata.ABI.ts; oframe = tmp; } } /* save a ts if needed */ if (oframe && oframe != frame) { oframe->abidata.ABI.ts = frame->abidata.ABI.ts; } /* and set if needed */ if (!GST_CLOCK_TIME_IS_VALID (frame->dts) && !seen_none) { frame->dts = min_ts; GST_DEBUG_OBJECT (encoder, "no valid DTS, using oldest PTS %" GST_TIME_FORMAT, GST_TIME_ARGS (frame->pts)); } } frame->distance_from_sync = priv->distance_from_sync; priv->distance_from_sync++; GST_BUFFER_PTS (frame->output_buffer) = frame->pts; GST_BUFFER_DTS (frame->output_buffer) = frame->dts; GST_BUFFER_DURATION (frame->output_buffer) = frame->duration; /* update rate estimate */ priv->bytes += gst_buffer_get_size (frame->output_buffer); if (GST_CLOCK_TIME_IS_VALID (frame->duration)) { priv->time += frame->duration; } else { /* better none than nothing valid */ priv->time = GST_CLOCK_TIME_NONE; } if (G_UNLIKELY (send_headers || priv->new_headers)) { GList *tmp, *copy = NULL; GST_DEBUG_OBJECT (encoder, "Sending headers"); /* First make all buffers metadata-writable */ for (tmp = priv->headers; tmp; tmp = tmp->next) { GstBuffer *tmpbuf = GST_BUFFER (tmp->data); copy = g_list_append (copy, gst_buffer_make_writable (tmpbuf)); } g_list_free (priv->headers); priv->headers = copy; for (tmp = priv->headers; tmp; tmp = tmp->next) { GstBuffer *tmpbuf = GST_BUFFER (tmp->data); priv->bytes += gst_buffer_get_size (tmpbuf); if (G_UNLIKELY (discont)) { GST_LOG_OBJECT (encoder, "marking discont"); GST_BUFFER_FLAG_SET (tmpbuf, GST_BUFFER_FLAG_DISCONT); discont = FALSE; } gst_pad_push (encoder->srcpad, gst_buffer_ref (tmpbuf)); } priv->new_headers = FALSE; } if (G_UNLIKELY (discont)) { GST_LOG_OBJECT (encoder, "marking discont"); GST_BUFFER_FLAG_SET (frame->output_buffer, GST_BUFFER_FLAG_DISCONT); } if (encoder_class->pre_push) ret = encoder_class->pre_push (encoder, frame); /* Get an additional ref to the buffer, which is going to be pushed * downstream, the original ref is owned by the frame */ buffer = gst_buffer_ref (frame->output_buffer); /* Release frame so the buffer is writable when we push it downstream * if possible, i.e. if the subclass does not hold additional references * to the frame */ gst_video_encoder_release_frame (encoder, frame); frame = NULL; if (ret == GST_FLOW_OK) ret = gst_pad_push (encoder->srcpad, buffer); done: /* handed out */ if (frame) gst_video_encoder_release_frame (encoder, frame); GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); return ret; /* ERRORS */ no_output_state: { GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); GST_ERROR_OBJECT (encoder, "Output state was not configured"); return GST_FLOW_ERROR; } } /** * gst_video_encoder_get_output_state: * @encoder: a #GstVideoEncoder * * Get the current #GstVideoCodecState * * Returns: (transfer full): #GstVideoCodecState describing format of video data. */ GstVideoCodecState * gst_video_encoder_get_output_state (GstVideoEncoder * encoder) { GstVideoCodecState *state; GST_VIDEO_ENCODER_STREAM_LOCK (encoder); state = gst_video_codec_state_ref (encoder->priv->output_state); GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); return state; } /** * gst_video_encoder_set_output_state: * @encoder: a #GstVideoEncoder * @caps: (transfer full): the #GstCaps to use for the output * @reference: (allow-none) (transfer none): An optional reference @GstVideoCodecState * * Creates a new #GstVideoCodecState with the specified caps as the output state * for the encoder. * Any previously set output state on @encoder will be replaced by the newly * created one. * * The specified @caps should not contain any resolution, pixel-aspect-ratio, * framerate, codec-data, .... Those should be specified instead in the returned * #GstVideoCodecState. * * If the subclass wishes to copy over existing fields (like pixel aspect ratio, * or framerate) from an existing #GstVideoCodecState, it can be provided as a * @reference. * * If the subclass wishes to override some fields from the output state (like * pixel-aspect-ratio or framerate) it can do so on the returned #GstVideoCodecState. * * The new output state will only take effect (set on pads and buffers) starting * from the next call to #gst_video_encoder_finish_frame(). * * Returns: (transfer full): the newly configured output state. */ GstVideoCodecState * gst_video_encoder_set_output_state (GstVideoEncoder * encoder, GstCaps * caps, GstVideoCodecState * reference) { GstVideoEncoderPrivate *priv = encoder->priv; GstVideoCodecState *state; g_return_val_if_fail (caps != NULL, NULL); state = _new_output_state (caps, reference); GST_VIDEO_ENCODER_STREAM_LOCK (encoder); if (priv->output_state) gst_video_codec_state_unref (priv->output_state); priv->output_state = gst_video_codec_state_ref (state); priv->output_state_changed = TRUE; GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); return state; } /** * gst_video_encoder_set_latency: * @encoder: a #GstVideoEncoder * @min_latency: minimum latency * @max_latency: maximum latency * * Informs baseclass of encoding latency. */ void gst_video_encoder_set_latency (GstVideoEncoder * encoder, GstClockTime min_latency, GstClockTime max_latency) { g_return_if_fail (GST_CLOCK_TIME_IS_VALID (min_latency)); g_return_if_fail (max_latency >= min_latency); GST_OBJECT_LOCK (encoder); encoder->priv->min_latency = min_latency; encoder->priv->max_latency = max_latency; GST_OBJECT_UNLOCK (encoder); gst_element_post_message (GST_ELEMENT_CAST (encoder), gst_message_new_latency (GST_OBJECT_CAST (encoder))); } /** * gst_video_encoder_get_latency: * @encoder: a #GstVideoEncoder * @min_latency: (out) (allow-none): address of variable in which to store the * configured minimum latency, or %NULL * @max_latency: (out) (allow-none): address of variable in which to store the * configured maximum latency, or %NULL * * Query the configured encoding latency. Results will be returned via * @min_latency and @max_latency. */ void gst_video_encoder_get_latency (GstVideoEncoder * encoder, GstClockTime * min_latency, GstClockTime * max_latency) { GST_OBJECT_LOCK (encoder); if (min_latency) *min_latency = encoder->priv->min_latency; if (max_latency) *max_latency = encoder->priv->max_latency; GST_OBJECT_UNLOCK (encoder); } /** * gst_video_encoder_get_oldest_frame: * @encoder: a #GstVideoEncoder * * Get the oldest unfinished pending #GstVideoCodecFrame * * Returns: (transfer full): oldest unfinished pending #GstVideoCodecFrame */ GstVideoCodecFrame * gst_video_encoder_get_oldest_frame (GstVideoEncoder * encoder) { GstVideoCodecFrame *frame = NULL; GST_VIDEO_ENCODER_STREAM_LOCK (encoder); if (encoder->priv->frames) frame = gst_video_codec_frame_ref (encoder->priv->frames->data); GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); return (GstVideoCodecFrame *) frame; } /** * gst_video_encoder_get_frame: * @encoder: a #GstVideoEnccoder * @frame_number: system_frame_number of a frame * * Get a pending unfinished #GstVideoCodecFrame * * Returns: (transfer full): pending unfinished #GstVideoCodecFrame identified by @frame_number. */ GstVideoCodecFrame * gst_video_encoder_get_frame (GstVideoEncoder * encoder, int frame_number) { GList *g; GstVideoCodecFrame *frame = NULL; GST_DEBUG_OBJECT (encoder, "frame_number : %d", frame_number); GST_VIDEO_ENCODER_STREAM_LOCK (encoder); for (g = encoder->priv->frames; g; g = g->next) { GstVideoCodecFrame *tmp = g->data; if (tmp->system_frame_number == frame_number) { frame = gst_video_codec_frame_ref (tmp); break; } } GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); return frame; } /** * gst_video_encoder_get_frames: * @encoder: a #GstVideoEncoder * * Get all pending unfinished #GstVideoCodecFrame * * Returns: (transfer full) (element-type GstVideoCodecFrame): pending unfinished #GstVideoCodecFrame. */ GList * gst_video_encoder_get_frames (GstVideoEncoder * encoder) { GList *frames; GST_VIDEO_ENCODER_STREAM_LOCK (encoder); frames = g_list_copy (encoder->priv->frames); g_list_foreach (frames, (GFunc) gst_video_codec_frame_ref, NULL); GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); return frames; } /** * gst_video_encoder_merge_tags: * @encoder: a #GstVideoEncoder * @tags: a #GstTagList to merge * @mode: the #GstTagMergeMode to use * * Adds tags to so-called pending tags, which will be processed * before pushing out data downstream. * * Note that this is provided for convenience, and the subclass is * not required to use this and can still do tag handling on its own. * * MT safe. */ void gst_video_encoder_merge_tags (GstVideoEncoder * encoder, const GstTagList * tags, GstTagMergeMode mode) { GstTagList *otags; g_return_if_fail (GST_IS_VIDEO_ENCODER (encoder)); g_return_if_fail (tags == NULL || GST_IS_TAG_LIST (tags)); GST_VIDEO_ENCODER_STREAM_LOCK (encoder); if (tags) GST_DEBUG_OBJECT (encoder, "merging tags %" GST_PTR_FORMAT, tags); otags = encoder->priv->tags; encoder->priv->tags = gst_tag_list_merge (encoder->priv->tags, tags, mode); if (otags) gst_tag_list_unref (otags); encoder->priv->tags_changed = TRUE; GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder); } /** * gst_video_encoder_get_allocator: * @encoder: a #GstVideoEncoder * @allocator: (out) (allow-none) (transfer full): the #GstAllocator * used * @params: (out) (allow-none) (transfer full): the * #GstAllocatorParams of @allocator * * Lets #GstVideoEncoder sub-classes to know the memory @allocator * used by the base class and its @params. * * Unref the @allocator after use it. */ void gst_video_encoder_get_allocator (GstVideoEncoder * encoder, GstAllocator ** allocator, GstAllocationParams * params) { g_return_if_fail (GST_IS_VIDEO_ENCODER (encoder)); if (allocator) *allocator = encoder->priv->allocator ? gst_object_ref (encoder->priv->allocator) : NULL; if (params) *params = encoder->priv->params; }