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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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d9cedee042
- introduce two new properties: * temporal-scalability-layer-flags: Provide fine-grained control of layer encoding to the outside world. The flags sequence should be a multiple of the periodicity and is indexed by a running count of encoded frames modulo the sequence length. * temporal-scalability-layer-sync-flags: Specify the pattern of inter-layer synchronisation (i.e. which of the frames generated by the layer encoding specification represent an inter-layer synchronisation). There must be one entry per entry in temporal-scalability-layer-flags. - apply temporal scalability settings and expose as buffer metadata. This allows the codec to allocate a given frame to the correct internal bitrate allocator. Additionally, all the non-bitstream metadata needed to payload a temporally scaled stream is now attached to each output buffer as a GstVideoVP8Meta. - add unit test for temporally scaled encoding. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/728>
513 lines
16 KiB
C
513 lines
16 KiB
C
/* VP8
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* Copyright (C) 2006 David Schleef <ds@schleef.org>
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* Copyright (C) 2010 Entropy Wave Inc
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* Copyright (C) 2010-2012 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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/**
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* SECTION:element-vp8enc
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* @title: vp8enc
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* @see_also: vp8dec, webmmux, oggmux
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*
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* This element encodes raw video into a VP8 stream.
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* [VP8](http://www.webmproject.org) is a royalty-free video codec maintained by
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* [Google](http://www.google.com/). It's the successor of On2 VP3, which was
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* the base of the Theora video codec.
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*
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* To control the quality of the encoding, the #GstVPXEnc:target-bitrate,
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* #GstVPXEnc:min-quantizer, #GstVPXEnc:max-quantizer or #GstVPXEnc:cq-level
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* properties can be used. Which one is used depends on the mode selected by
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* the #GstVPXEnc:end-usage property.
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* See [Encoder Parameters](http://www.webmproject.org/docs/encoder-parameters/)
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* for explanation, examples for useful encoding parameters and more details
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* on the encoding parameters.
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*
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* ## Example pipeline
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* |[
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* gst-launch-1.0 -v videotestsrc num-buffers=1000 ! vp8enc ! webmmux ! filesink location=videotestsrc.webm
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* ]| This example pipeline will encode a test video source to VP8 muxed in an
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* WebM container.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef HAVE_VP8_ENCODER
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/* glib decided in 2.32 it would be a great idea to deprecated GValueArray without
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* providing an alternative
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*
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* See https://bugzilla.gnome.org/show_bug.cgi?id=667228
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* */
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#define GLIB_DISABLE_DEPRECATION_WARNINGS
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#include <gst/tag/tag.h>
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#include <gst/video/video.h>
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#include <string.h>
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#include "gstvp8utils.h"
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#include "gstvp8enc.h"
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GST_DEBUG_CATEGORY_STATIC (gst_vp8enc_debug);
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#define GST_CAT_DEFAULT gst_vp8enc_debug
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typedef struct
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{
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vpx_image_t *image;
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GList *invisible;
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guint layer_id;
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guint8 tl0picidx;
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gboolean layer_sync;
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} GstVP8EncUserData;
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static void
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_gst_mini_object_unref0 (GstMiniObject * obj)
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{
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if (obj)
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gst_mini_object_unref (obj);
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}
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static void
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gst_vp8_enc_user_data_free (GstVP8EncUserData * user_data)
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{
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if (user_data->image)
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g_slice_free (vpx_image_t, user_data->image);
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g_list_foreach (user_data->invisible, (GFunc) _gst_mini_object_unref0, NULL);
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g_list_free (user_data->invisible);
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g_slice_free (GstVP8EncUserData, user_data);
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}
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static vpx_codec_iface_t *gst_vp8_enc_get_algo (GstVPXEnc * enc);
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static gboolean gst_vp8_enc_enable_scaling (GstVPXEnc * enc);
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static void gst_vp8_enc_set_image_format (GstVPXEnc * enc, vpx_image_t * image);
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static GstCaps *gst_vp8_enc_get_new_simple_caps (GstVPXEnc * enc);
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static void gst_vp8_enc_set_stream_info (GstVPXEnc * enc, GstCaps * caps,
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GstVideoInfo * info);
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static void *gst_vp8_enc_process_frame_user_data (GstVPXEnc * enc,
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GstVideoCodecFrame * frame);
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static GstFlowReturn gst_vp8_enc_handle_invisible_frame_buffer (GstVPXEnc * enc,
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void *user_data, GstBuffer * buffer);
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static void gst_vp8_enc_set_frame_user_data (GstVPXEnc * enc,
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GstVideoCodecFrame * frame, vpx_image_t * image);
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static void gst_vp8_enc_apply_frame_temporal_settings (GstVPXEnc * enc,
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GstVideoCodecFrame * frame, guint layer_id, guint8 tl0picidx,
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gboolean layer_sync);
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static void gst_vp8_enc_get_frame_temporal_settings (GstVPXEnc * enc,
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GstVideoCodecFrame * frame, guint * layer_id, guint8 * tl0picidx,
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gboolean * layer_sync);
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static void gst_vp8_enc_preflight_buffer (GstVPXEnc * enc,
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GstVideoCodecFrame * frame, GstBuffer * buffer,
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gboolean layer_sync, guint layer_id, guint8 tl0picidx);
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static GstFlowReturn gst_vp8_enc_pre_push (GstVideoEncoder * encoder,
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GstVideoCodecFrame * frame);
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static GstStaticPadTemplate gst_vp8_enc_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-raw, "
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"format = (string) \"I420\", "
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"width = (int) [1, 16383], "
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"height = (int) [1, 16383], framerate = (fraction) [ 0/1, MAX ]")
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);
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static GstStaticPadTemplate gst_vp8_enc_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-vp8, " "profile = (string) {0, 1, 2, 3}")
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);
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#define parent_class gst_vp8_enc_parent_class
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G_DEFINE_TYPE (GstVP8Enc, gst_vp8_enc, GST_TYPE_VPX_ENC);
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static void
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gst_vp8_enc_class_init (GstVP8EncClass * klass)
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{
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GstElementClass *element_class;
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GstVideoEncoderClass *video_encoder_class;
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GstVPXEncClass *vpx_encoder_class;
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element_class = GST_ELEMENT_CLASS (klass);
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video_encoder_class = GST_VIDEO_ENCODER_CLASS (klass);
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vpx_encoder_class = GST_VPX_ENC_CLASS (klass);
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gst_element_class_add_static_pad_template (element_class,
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&gst_vp8_enc_src_template);
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gst_element_class_add_static_pad_template (element_class,
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&gst_vp8_enc_sink_template);
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gst_element_class_set_static_metadata (element_class,
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"On2 VP8 Encoder",
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"Codec/Encoder/Video",
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"Encode VP8 video streams", "David Schleef <ds@entropywave.com>, "
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"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
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video_encoder_class->pre_push = gst_vp8_enc_pre_push;
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vpx_encoder_class->get_algo = gst_vp8_enc_get_algo;
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vpx_encoder_class->enable_scaling = gst_vp8_enc_enable_scaling;
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vpx_encoder_class->set_image_format = gst_vp8_enc_set_image_format;
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vpx_encoder_class->get_new_vpx_caps = gst_vp8_enc_get_new_simple_caps;
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vpx_encoder_class->set_stream_info = gst_vp8_enc_set_stream_info;
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vpx_encoder_class->process_frame_user_data =
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gst_vp8_enc_process_frame_user_data;
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vpx_encoder_class->handle_invisible_frame_buffer =
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gst_vp8_enc_handle_invisible_frame_buffer;
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vpx_encoder_class->set_frame_user_data = gst_vp8_enc_set_frame_user_data;
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vpx_encoder_class->apply_frame_temporal_settings =
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gst_vp8_enc_apply_frame_temporal_settings;
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vpx_encoder_class->get_frame_temporal_settings =
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gst_vp8_enc_get_frame_temporal_settings;
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vpx_encoder_class->preflight_buffer = gst_vp8_enc_preflight_buffer;
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GST_DEBUG_CATEGORY_INIT (gst_vp8enc_debug, "vp8enc", 0, "VP8 Encoder");
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}
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static void
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gst_vp8_enc_init (GstVP8Enc * gst_vp8_enc)
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{
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vpx_codec_err_t status;
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GstVPXEnc *gst_vpx_enc = GST_VPX_ENC (gst_vp8_enc);
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GST_DEBUG_OBJECT (gst_vp8_enc, "gst_vp8_enc_init");
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status =
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vpx_codec_enc_config_default (gst_vp8_enc_get_algo (gst_vpx_enc),
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&gst_vpx_enc->cfg, 0);
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if (status != VPX_CODEC_OK) {
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GST_ERROR_OBJECT (gst_vpx_enc,
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"Failed to get default encoder configuration: %s",
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gst_vpx_error_name (status));
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gst_vpx_enc->have_default_config = FALSE;
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} else {
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gst_vpx_enc->have_default_config = TRUE;
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}
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}
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static vpx_codec_iface_t *
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gst_vp8_enc_get_algo (GstVPXEnc * enc)
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{
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return &vpx_codec_vp8_cx_algo;
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}
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static gboolean
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gst_vp8_enc_enable_scaling (GstVPXEnc * enc)
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{
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return TRUE;
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}
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static void
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gst_vp8_enc_set_image_format (GstVPXEnc * enc, vpx_image_t * image)
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{
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image->fmt = VPX_IMG_FMT_I420;
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image->bps = 12;
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image->x_chroma_shift = image->y_chroma_shift = 1;
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}
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static GstCaps *
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gst_vp8_enc_get_new_simple_caps (GstVPXEnc * enc)
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{
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GstCaps *caps;
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gchar *profile_str = g_strdup_printf ("%d", enc->cfg.g_profile);
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caps = gst_caps_new_simple ("video/x-vp8",
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"profile", G_TYPE_STRING, profile_str, NULL);
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g_free (profile_str);
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return caps;
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}
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static void
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gst_vp8_enc_set_stream_info (GstVPXEnc * enc, GstCaps * caps,
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GstVideoInfo * info)
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{
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GstStructure *s;
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GstVideoEncoder *video_encoder;
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GstBuffer *stream_hdr, *vorbiscomment;
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const GstTagList *iface_tags;
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GValue array = { 0, };
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GValue value = { 0, };
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guint8 *data = NULL;
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GstMapInfo map;
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video_encoder = GST_VIDEO_ENCODER (enc);
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s = gst_caps_get_structure (caps, 0);
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/* put buffers in a fixed list */
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g_value_init (&array, GST_TYPE_ARRAY);
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g_value_init (&value, GST_TYPE_BUFFER);
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/* Create Ogg stream-info */
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stream_hdr = gst_buffer_new_and_alloc (26);
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gst_buffer_map (stream_hdr, &map, GST_MAP_WRITE);
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data = map.data;
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GST_WRITE_UINT8 (data, 0x4F);
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GST_WRITE_UINT32_BE (data + 1, 0x56503830); /* "VP80" */
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GST_WRITE_UINT8 (data + 5, 0x01); /* stream info header */
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GST_WRITE_UINT8 (data + 6, 1); /* Major version 1 */
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GST_WRITE_UINT8 (data + 7, 0); /* Minor version 0 */
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GST_WRITE_UINT16_BE (data + 8, GST_VIDEO_INFO_WIDTH (info));
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GST_WRITE_UINT16_BE (data + 10, GST_VIDEO_INFO_HEIGHT (info));
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GST_WRITE_UINT24_BE (data + 12, GST_VIDEO_INFO_PAR_N (info));
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GST_WRITE_UINT24_BE (data + 15, GST_VIDEO_INFO_PAR_D (info));
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GST_WRITE_UINT32_BE (data + 18, GST_VIDEO_INFO_FPS_N (info));
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GST_WRITE_UINT32_BE (data + 22, GST_VIDEO_INFO_FPS_D (info));
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gst_buffer_unmap (stream_hdr, &map);
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GST_BUFFER_FLAG_SET (stream_hdr, GST_BUFFER_FLAG_HEADER);
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gst_value_set_buffer (&value, stream_hdr);
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gst_value_array_append_value (&array, &value);
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g_value_unset (&value);
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gst_buffer_unref (stream_hdr);
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iface_tags = gst_tag_setter_get_tag_list (GST_TAG_SETTER (video_encoder));
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if (iface_tags) {
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vorbiscomment =
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gst_tag_list_to_vorbiscomment_buffer (iface_tags,
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(const guint8 *) "OVP80\2 ", 7,
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"Encoded with GStreamer vp8enc " PACKAGE_VERSION);
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GST_BUFFER_FLAG_SET (vorbiscomment, GST_BUFFER_FLAG_HEADER);
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g_value_init (&value, GST_TYPE_BUFFER);
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gst_value_set_buffer (&value, vorbiscomment);
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gst_value_array_append_value (&array, &value);
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g_value_unset (&value);
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gst_buffer_unref (vorbiscomment);
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}
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gst_structure_set_value (s, "streamheader", &array);
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g_value_unset (&array);
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}
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static void *
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gst_vp8_enc_process_frame_user_data (GstVPXEnc * enc,
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GstVideoCodecFrame * frame)
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{
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GstVP8EncUserData *user_data;
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user_data = gst_video_codec_frame_get_user_data (frame);
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if (!user_data) {
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GST_ERROR_OBJECT (enc, "Have no frame user data");
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return NULL;
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}
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if (user_data->image)
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g_slice_free (vpx_image_t, user_data->image);
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user_data->image = NULL;
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return user_data;
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}
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static GstFlowReturn
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gst_vp8_enc_handle_invisible_frame_buffer (GstVPXEnc * enc, void *user_data,
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GstBuffer * buffer)
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{
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GstVP8EncUserData *vp8_user_data = (GstVP8EncUserData *) user_data;
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if (!vp8_user_data) {
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GST_ERROR_OBJECT (enc, "Have no frame user data");
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return GST_FLOW_ERROR;
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}
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vp8_user_data->invisible = g_list_append (vp8_user_data->invisible, buffer);
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return GST_FLOW_OK;
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}
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static void
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gst_vp8_enc_set_frame_user_data (GstVPXEnc * enc, GstVideoCodecFrame * frame,
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vpx_image_t * image)
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{
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GstVP8EncUserData *user_data;
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user_data = g_slice_new0 (GstVP8EncUserData);
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user_data->image = image;
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gst_video_codec_frame_set_user_data (frame, user_data,
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(GDestroyNotify) gst_vp8_enc_user_data_free);
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return;
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}
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static void
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gst_vp8_enc_apply_frame_temporal_settings (GstVPXEnc * enc,
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GstVideoCodecFrame * frame, guint layer_id, guint8 tl0picidx,
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gboolean layer_sync)
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{
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GstVP8EncUserData *user_data;
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user_data = gst_video_codec_frame_get_user_data (frame);
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if (!user_data) {
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GST_ERROR_OBJECT (enc, "Have no frame user data");
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return;
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}
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vpx_codec_control (&enc->encoder, VP8E_SET_TEMPORAL_LAYER_ID, layer_id);
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user_data->layer_id = layer_id;
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user_data->tl0picidx = tl0picidx;
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user_data->layer_sync = layer_sync;
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return;
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}
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static void
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gst_vp8_enc_get_frame_temporal_settings (GstVPXEnc * enc,
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GstVideoCodecFrame * frame, guint * layer_id, guint8 * tl0picidx,
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gboolean * layer_sync)
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{
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GstVP8EncUserData *user_data;
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user_data = gst_video_codec_frame_get_user_data (frame);
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if (!user_data) {
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GST_ERROR_OBJECT (enc, "Have no frame user data");
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*layer_id = 0;
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*tl0picidx = 0;
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*layer_sync = FALSE;
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return;
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}
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*layer_id = user_data->layer_id;
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*tl0picidx = user_data->tl0picidx;
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*layer_sync = user_data->layer_sync;
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return;
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}
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static void
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gst_vp8_enc_preflight_buffer (GstVPXEnc * enc,
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GstVideoCodecFrame * frame, GstBuffer * buffer,
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gboolean layer_sync, guint layer_id, guint8 tl0picidx)
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{
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GstCustomMeta *meta = gst_buffer_add_custom_meta (buffer, "GstVP8Meta");
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GstStructure *s = gst_custom_meta_get_structure (meta);
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gst_structure_set (s,
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"use-temporal-scaling", G_TYPE_BOOLEAN, (enc->cfg.ts_periodicity != 0),
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"layer-sync", G_TYPE_BOOLEAN, layer_sync,
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"layer-id", G_TYPE_UINT, layer_id,
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"tl0picidx", G_TYPE_UINT, tl0picidx, NULL);
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}
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static guint64
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_to_granulepos (guint64 frame_end_number, guint inv_count, guint keyframe_dist)
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{
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guint64 granulepos;
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guint inv;
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inv = (inv_count == 0) ? 0x3 : inv_count - 1;
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granulepos = (frame_end_number << 32) | (inv << 30) | (keyframe_dist << 3);
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return granulepos;
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}
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static GstFlowReturn
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gst_vp8_enc_pre_push (GstVideoEncoder * video_encoder,
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GstVideoCodecFrame * frame)
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{
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GstVP8Enc *encoder;
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GstVPXEnc *vpx_enc;
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GstBuffer *buf;
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GstFlowReturn ret = GST_FLOW_OK;
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GstVP8EncUserData *user_data = gst_video_codec_frame_get_user_data (frame);
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GList *l;
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gint inv_count;
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GstVideoInfo *info;
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GST_DEBUG_OBJECT (video_encoder, "pre_push");
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encoder = GST_VP8_ENC (video_encoder);
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vpx_enc = GST_VPX_ENC (encoder);
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info = &vpx_enc->input_state->info;
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g_assert (user_data != NULL);
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for (inv_count = 0, l = user_data->invisible; l; inv_count++, l = l->next) {
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buf = l->data;
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l->data = NULL;
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/* FIXME : All of this should have already been handled by base classes, no ? */
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if (l == user_data->invisible
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&& GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT (frame)) {
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GST_BUFFER_FLAG_UNSET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
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encoder->keyframe_distance = 0;
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} else {
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GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
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encoder->keyframe_distance++;
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}
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GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DECODE_ONLY);
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GST_BUFFER_TIMESTAMP (buf) = GST_BUFFER_TIMESTAMP (frame->output_buffer);
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GST_BUFFER_DURATION (buf) = 0;
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if (GST_VIDEO_INFO_FPS_D (info) == 0 || GST_VIDEO_INFO_FPS_N (info) == 0) {
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GST_BUFFER_OFFSET_END (buf) = GST_BUFFER_OFFSET_NONE;
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GST_BUFFER_OFFSET (buf) = GST_BUFFER_OFFSET_NONE;
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} else {
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GST_BUFFER_OFFSET_END (buf) =
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_to_granulepos (frame->presentation_frame_number + 1,
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inv_count, encoder->keyframe_distance);
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GST_BUFFER_OFFSET (buf) =
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gst_util_uint64_scale (frame->presentation_frame_number + 1,
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GST_SECOND * GST_VIDEO_INFO_FPS_D (info),
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GST_VIDEO_INFO_FPS_N (info));
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}
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ret = gst_pad_push (GST_VIDEO_ENCODER_SRC_PAD (video_encoder), buf);
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if (ret != GST_FLOW_OK) {
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GST_WARNING_OBJECT (encoder, "flow error %d", ret);
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goto done;
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}
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}
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buf = frame->output_buffer;
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/* FIXME : All of this should have already been handled by base classes, no ? */
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if (!user_data->invisible && GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT (frame)) {
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GST_BUFFER_FLAG_UNSET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
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encoder->keyframe_distance = 0;
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} else {
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GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
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encoder->keyframe_distance++;
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}
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if (GST_VIDEO_INFO_FPS_D (info) == 0 || GST_VIDEO_INFO_FPS_N (info) == 0) {
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GST_BUFFER_OFFSET_END (buf) = GST_BUFFER_OFFSET_NONE;
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GST_BUFFER_OFFSET (buf) = GST_BUFFER_OFFSET_NONE;
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} else {
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GST_BUFFER_OFFSET_END (buf) =
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_to_granulepos (frame->presentation_frame_number + 1, 0,
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encoder->keyframe_distance);
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GST_BUFFER_OFFSET (buf) =
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gst_util_uint64_scale (frame->presentation_frame_number + 1,
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GST_SECOND * GST_VIDEO_INFO_FPS_D (info), GST_VIDEO_INFO_FPS_N (info));
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}
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GST_LOG_OBJECT (video_encoder, "src ts: %" GST_TIME_FORMAT,
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GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
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done:
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return ret;
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}
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#endif /* HAVE_VP8_ENCODER */
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