gstreamer/subprojects/gst-plugins-bad/gst-libs/gst/codecs/gstav1decoder.c

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/* GStreamer
* Copyright (C) 2020 He Junyan <junyan.he@intel.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gstav1decoder
* @title: Gstav1Decoder
* @short_description: Base class to implement stateless AV1 decoders
* @sources:
* - gstav1picture.h
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "gstav1decoder.h"
GST_DEBUG_CATEGORY (gst_av1_decoder_debug);
#define GST_CAT_DEFAULT gst_av1_decoder_debug
struct _GstAV1DecoderPrivate
{
gint max_width;
gint max_height;
GstAV1Profile profile;
GstAV1Parser *parser;
GstAV1Dpb *dpb;
GstAV1Picture *current_picture;
GstVideoCodecFrame *current_frame;
};
#define parent_class gst_av1_decoder_parent_class
G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GstAV1Decoder, gst_av1_decoder,
GST_TYPE_VIDEO_DECODER,
G_ADD_PRIVATE (GstAV1Decoder);
GST_DEBUG_CATEGORY_INIT (gst_av1_decoder_debug, "av1decoder", 0,
"AV1 Video Decoder"));
static gint
_floor_log2 (guint32 x)
{
gint s = 0;
while (x != 0) {
x = x >> 1;
s++;
}
return s - 1;
}
static gboolean gst_av1_decoder_start (GstVideoDecoder * decoder);
static gboolean gst_av1_decoder_stop (GstVideoDecoder * decoder);
static gboolean gst_av1_decoder_set_format (GstVideoDecoder * decoder,
GstVideoCodecState * state);
static GstFlowReturn gst_av1_decoder_finish (GstVideoDecoder * decoder);
static gboolean gst_av1_decoder_flush (GstVideoDecoder * decoder);
static GstFlowReturn gst_av1_decoder_drain (GstVideoDecoder * decoder);
static GstFlowReturn gst_av1_decoder_handle_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame);
static void
gst_av1_decoder_class_init (GstAV1DecoderClass * klass)
{
GstVideoDecoderClass *decoder_class = GST_VIDEO_DECODER_CLASS (klass);
decoder_class->start = GST_DEBUG_FUNCPTR (gst_av1_decoder_start);
decoder_class->stop = GST_DEBUG_FUNCPTR (gst_av1_decoder_stop);
decoder_class->set_format = GST_DEBUG_FUNCPTR (gst_av1_decoder_set_format);
decoder_class->finish = GST_DEBUG_FUNCPTR (gst_av1_decoder_finish);
decoder_class->flush = GST_DEBUG_FUNCPTR (gst_av1_decoder_flush);
decoder_class->drain = GST_DEBUG_FUNCPTR (gst_av1_decoder_drain);
decoder_class->handle_frame =
GST_DEBUG_FUNCPTR (gst_av1_decoder_handle_frame);
}
static void
gst_av1_decoder_init (GstAV1Decoder * self)
{
gst_video_decoder_set_packetized (GST_VIDEO_DECODER (self), TRUE);
self->priv = gst_av1_decoder_get_instance_private (self);
}
static void
gst_av1_decoder_reset (GstAV1Decoder * self)
{
GstAV1DecoderPrivate *priv = self->priv;
priv->max_width = 0;
priv->max_height = 0;
gst_clear_av1_picture (&priv->current_picture);
priv->current_frame = NULL;
priv->profile = GST_AV1_PROFILE_UNDEFINED;
if (priv->dpb)
gst_av1_dpb_clear (priv->dpb);
if (priv->parser)
gst_av1_parser_reset (priv->parser, FALSE);
}
static gboolean
gst_av1_decoder_start (GstVideoDecoder * decoder)
{
GstAV1Decoder *self = GST_AV1_DECODER (decoder);
GstAV1DecoderPrivate *priv = self->priv;
priv->parser = gst_av1_parser_new ();
priv->dpb = gst_av1_dpb_new ();
gst_av1_decoder_reset (self);
return TRUE;
}
static gboolean
gst_av1_decoder_stop (GstVideoDecoder * decoder)
{
GstAV1Decoder *self = GST_AV1_DECODER (decoder);
GstAV1DecoderPrivate *priv = self->priv;
gst_av1_decoder_reset (self);
g_clear_pointer (&self->input_state, gst_video_codec_state_unref);
g_clear_pointer (&priv->parser, gst_av1_parser_free);
g_clear_pointer (&priv->dpb, gst_av1_dpb_free);
return TRUE;
}
static gboolean
gst_av1_decoder_set_format (GstVideoDecoder * decoder,
GstVideoCodecState * state)
{
GstAV1Decoder *self = GST_AV1_DECODER (decoder);
GstAV1DecoderPrivate *priv = self->priv;
GST_DEBUG_OBJECT (decoder, "Set format");
if (self->input_state)
gst_video_codec_state_unref (self->input_state);
self->input_state = gst_video_codec_state_ref (state);
priv->max_width = GST_VIDEO_INFO_WIDTH (&state->info);
priv->max_height = GST_VIDEO_INFO_HEIGHT (&state->info);
return TRUE;
}
static GstFlowReturn
gst_av1_decoder_finish (GstVideoDecoder * decoder)
{
GST_DEBUG_OBJECT (decoder, "finish");
gst_av1_decoder_reset (GST_AV1_DECODER (decoder));
return GST_FLOW_OK;
}
static gboolean
gst_av1_decoder_flush (GstVideoDecoder * decoder)
{
GST_DEBUG_OBJECT (decoder, "flush");
gst_av1_decoder_reset (GST_AV1_DECODER (decoder));
return TRUE;
}
static GstFlowReturn
gst_av1_decoder_drain (GstVideoDecoder * decoder)
{
GST_DEBUG_OBJECT (decoder, "drain");
gst_av1_decoder_reset (GST_AV1_DECODER (decoder));
return GST_FLOW_OK;
}
static const gchar *
get_obu_name (GstAV1OBUType type)
{
switch (type) {
case GST_AV1_OBU_SEQUENCE_HEADER:
return "sequence header";
case GST_AV1_OBU_TEMPORAL_DELIMITER:
return "temporal delimiter";
case GST_AV1_OBU_FRAME_HEADER:
return "frame header";
case GST_AV1_OBU_TILE_GROUP:
return "tile group";
case GST_AV1_OBU_METADATA:
return "metadata";
case GST_AV1_OBU_FRAME:
return "frame";
case GST_AV1_OBU_REDUNDANT_FRAME_HEADER:
return "redundant frame header";
case GST_AV1_OBU_TILE_LIST:
return "tile list";
case GST_AV1_OBU_PADDING:
return "padding";
default:
return "unknown";
}
return NULL;
}
static const gchar *
gst_av1_decoder_profile_to_string (GstAV1Profile profile)
{
switch (profile) {
case GST_AV1_PROFILE_0:
return "0";
case GST_AV1_PROFILE_1:
return "1";
case GST_AV1_PROFILE_2:
return "2";
default:
break;
}
return NULL;
}
static GstFlowReturn
gst_av1_decoder_process_sequence (GstAV1Decoder * self, GstAV1OBU * obu)
{
GstAV1ParserResult res;
GstAV1DecoderPrivate *priv = self->priv;
GstAV1SequenceHeaderOBU seq_header;
GstAV1SequenceHeaderOBU old_seq_header = { 0, };
GstAV1DecoderClass *klass = GST_AV1_DECODER_GET_CLASS (self);
GstFlowReturn ret = GST_FLOW_OK;
if (priv->parser->seq_header)
old_seq_header = *priv->parser->seq_header;
res = gst_av1_parser_parse_sequence_header_obu (priv->parser,
obu, &seq_header);
if (res != GST_AV1_PARSER_OK) {
GST_WARNING_OBJECT (self, "Parsing sequence failed.");
return GST_FLOW_ERROR;
}
if (!memcmp (&old_seq_header, &seq_header, sizeof (GstAV1SequenceHeaderOBU))) {
GST_DEBUG_OBJECT (self, "Get same sequence header.");
return GST_FLOW_OK;
}
g_assert (klass->new_sequence);
GST_DEBUG_OBJECT (self,
"Sequence updated, profile %s -> %s, max resolution: %dx%d -> %dx%d",
gst_av1_decoder_profile_to_string (priv->profile),
gst_av1_decoder_profile_to_string (seq_header.seq_profile),
priv->max_width, priv->max_height, seq_header.max_frame_width_minus_1 + 1,
seq_header.max_frame_height_minus_1 + 1);
ret = klass->new_sequence (self, &seq_header);
if (ret != GST_FLOW_OK) {
GST_ERROR_OBJECT (self, "subclass does not want accept new sequence");
return ret;
}
priv->profile = seq_header.seq_profile;
priv->max_width = seq_header.max_frame_width_minus_1 + 1;
priv->max_height = seq_header.max_frame_height_minus_1 + 1;
gst_av1_dpb_clear (priv->dpb);
return GST_FLOW_OK;
}
static GstFlowReturn
gst_av1_decoder_decode_tile_group (GstAV1Decoder * self,
GstAV1TileGroupOBU * tile_group, GstAV1OBU * obu)
{
GstAV1DecoderPrivate *priv = self->priv;
GstAV1DecoderClass *klass = GST_AV1_DECODER_GET_CLASS (self);
GstAV1Picture *picture = priv->current_picture;
GstAV1Tile tile;
GstFlowReturn ret = GST_FLOW_OK;
if (!picture) {
GST_ERROR_OBJECT (self, "No picture has created for current frame");
return GST_FLOW_ERROR;
}
if (picture->frame_hdr.show_existing_frame) {
GST_ERROR_OBJECT (self, "Current picture is showing the existing frame.");
return GST_FLOW_ERROR;
}
tile.obu = *obu;
tile.tile_group = *tile_group;
g_assert (klass->decode_tile);
ret = klass->decode_tile (self, picture, &tile);
if (ret != GST_FLOW_OK) {
GST_WARNING_OBJECT (self, "Decode tile error");
return ret;
}
return GST_FLOW_OK;
}
static GstFlowReturn
gst_av1_decoder_decode_frame_header (GstAV1Decoder * self,
GstAV1FrameHeaderOBU * frame_header)
{
GstAV1DecoderPrivate *priv = self->priv;
GstAV1DecoderClass *klass = GST_AV1_DECODER_GET_CLASS (self);
GstAV1Picture *picture = NULL;
GstFlowReturn ret = GST_FLOW_OK;
g_assert (priv->current_frame);
if (priv->current_picture != NULL) {
GST_ERROR_OBJECT (self, "Already have picture for current frame");
return GST_FLOW_ERROR;
}
if (frame_header->show_existing_frame) {
GstAV1Picture *ref_picture;
ref_picture = priv->dpb->pic_list[frame_header->frame_to_show_map_idx];
if (!ref_picture) {
GST_WARNING_OBJECT (self, "Failed to find the frame index %d to show.",
frame_header->frame_to_show_map_idx);
return GST_FLOW_ERROR;
}
/* The duplicated picture, if a key frame, will be placed in the DPB and
* for this reason is not optional. */
g_assert (klass->duplicate_picture);
picture = klass->duplicate_picture (self, priv->current_frame, ref_picture);
if (!picture) {
GST_ERROR_OBJECT (self, "subclass didn't provide duplicated picture");
return GST_FLOW_ERROR;
}
picture->system_frame_number = ref_picture->system_frame_number;
picture->frame_hdr = *frame_header;
priv->current_picture = picture;
} else {
picture = gst_av1_picture_new ();
picture->frame_hdr = *frame_header;
picture->display_frame_id = frame_header->display_frame_id;
picture->show_frame = frame_header->show_frame;
picture->showable_frame = frame_header->showable_frame;
picture->apply_grain = frame_header->film_grain_params.apply_grain;
picture->system_frame_number = priv->current_frame->system_frame_number;
if (!frame_header->show_frame && !frame_header->showable_frame)
GST_VIDEO_CODEC_FRAME_FLAG_SET (priv->current_frame,
GST_VIDEO_CODEC_FRAME_FLAG_DECODE_ONLY);
if (klass->new_picture) {
ret = klass->new_picture (self, priv->current_frame, picture);
if (ret != GST_FLOW_OK) {
GST_WARNING_OBJECT (self, "new picture error");
return ret;
}
}
priv->current_picture = picture;
if (klass->start_picture) {
ret = klass->start_picture (self, picture, priv->dpb);
if (ret != GST_FLOW_OK) {
GST_WARNING_OBJECT (self, "start picture error");
return ret;
}
}
}
g_assert (priv->current_picture != NULL);
return GST_FLOW_OK;
}
static GstFlowReturn
gst_av1_decoder_process_frame_header (GstAV1Decoder * self, GstAV1OBU * obu)
{
GstAV1ParserResult res;
GstAV1DecoderPrivate *priv = self->priv;
GstAV1FrameHeaderOBU frame_header;
res = gst_av1_parser_parse_frame_header_obu (priv->parser, obu,
&frame_header);
if (res != GST_AV1_PARSER_OK) {
GST_WARNING_OBJECT (self, "Parsing frame header failed.");
return GST_FLOW_ERROR;
}
return gst_av1_decoder_decode_frame_header (self, &frame_header);
}
static GstFlowReturn
gst_av1_decoder_process_tile_group (GstAV1Decoder * self, GstAV1OBU * obu)
{
GstAV1ParserResult res;
GstAV1DecoderPrivate *priv = self->priv;
GstAV1TileGroupOBU tile_group;
res = gst_av1_parser_parse_tile_group_obu (priv->parser, obu, &tile_group);
if (res != GST_AV1_PARSER_OK) {
GST_WARNING_OBJECT (self, "Parsing tile group failed.");
return GST_FLOW_ERROR;
}
return gst_av1_decoder_decode_tile_group (self, &tile_group, obu);
}
static GstFlowReturn
gst_av1_decoder_process_frame (GstAV1Decoder * self, GstAV1OBU * obu)
{
GstAV1ParserResult res;
GstAV1DecoderPrivate *priv = self->priv;
GstAV1FrameOBU frame;
GstFlowReturn ret = GST_FLOW_OK;
res = gst_av1_parser_parse_frame_obu (priv->parser, obu, &frame);
if (res != GST_AV1_PARSER_OK) {
GST_WARNING_OBJECT (self, "Parsing frame failed.");
return GST_FLOW_ERROR;
}
ret = gst_av1_decoder_decode_frame_header (self, &frame.frame_header);
if (ret != GST_FLOW_OK)
return ret;
return gst_av1_decoder_decode_tile_group (self, &frame.tile_group, obu);
}
static GstFlowReturn
gst_av1_decoder_temporal_delimiter (GstAV1Decoder * self, GstAV1OBU * obu)
{
GstAV1DecoderPrivate *priv = self->priv;
if (gst_av1_parser_parse_temporal_delimiter_obu (priv->parser, obu) ==
GST_AV1_PARSER_OK) {
return GST_FLOW_OK;
}
return GST_FLOW_ERROR;
}
static GstFlowReturn
gst_av1_decoder_decode_one_obu (GstAV1Decoder * self, GstAV1OBU * obu)
{
GstFlowReturn ret = GST_FLOW_OK;
GST_LOG_OBJECT (self, "Decode obu %s", get_obu_name (obu->obu_type));
switch (obu->obu_type) {
case GST_AV1_OBU_SEQUENCE_HEADER:
ret = gst_av1_decoder_process_sequence (self, obu);
break;
case GST_AV1_OBU_FRAME_HEADER:
ret = gst_av1_decoder_process_frame_header (self, obu);
break;
case GST_AV1_OBU_FRAME:
ret = gst_av1_decoder_process_frame (self, obu);
break;
case GST_AV1_OBU_TILE_GROUP:
ret = gst_av1_decoder_process_tile_group (self, obu);
break;
case GST_AV1_OBU_TEMPORAL_DELIMITER:
ret = gst_av1_decoder_temporal_delimiter (self, obu);
break;
/* TODO: may need to handled. */
case GST_AV1_OBU_METADATA:
case GST_AV1_OBU_REDUNDANT_FRAME_HEADER:
case GST_AV1_OBU_TILE_LIST:
case GST_AV1_OBU_PADDING:
break;
default:
GST_WARNING_OBJECT (self, "an unrecognized obu type %d", obu->obu_type);
break;
}
if (ret != GST_FLOW_OK)
GST_WARNING_OBJECT (self, "Failed to handle %s OBU",
get_obu_name (obu->obu_type));
return ret;
}
static void
gst_av1_decoder_update_state (GstAV1Decoder * self)
{
GstAV1DecoderPrivate *priv = self->priv;
GstAV1Picture *picture = priv->current_picture;
GstAV1ParserResult res;
GstAV1FrameHeaderOBU *fh;
g_assert (picture);
fh = &picture->frame_hdr;
/* This is a show_existing_frame case, only update key frame */
if (fh->show_existing_frame && fh->frame_type != GST_AV1_KEY_FRAME)
return;
res = gst_av1_parser_reference_frame_update (priv->parser, fh);
if (res != GST_AV1_PARSER_OK) {
GST_ERROR_OBJECT (self, "failed to update the reference.");
return;
}
gst_av1_dpb_add (priv->dpb, gst_av1_picture_ref (picture));
}
static GstFlowReturn
gst_av1_decoder_handle_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame)
{
GstAV1Decoder *self = GST_AV1_DECODER (decoder);
GstAV1DecoderPrivate *priv = self->priv;
GstAV1DecoderClass *klass = GST_AV1_DECODER_GET_CLASS (self);
GstBuffer *in_buf = frame->input_buffer;
GstMapInfo map;
GstFlowReturn ret = GST_FLOW_OK;
guint32 total_consumed, consumed;
GstAV1OBU obu;
GstAV1ParserResult res;
GST_LOG_OBJECT (self, "handle frame id %d, buf %" GST_PTR_FORMAT,
frame->system_frame_number, in_buf);
priv->current_frame = frame;
g_assert (!priv->current_picture);
if (!gst_buffer_map (in_buf, &map, GST_MAP_READ)) {
priv->current_frame = NULL;
GST_ERROR_OBJECT (self, "can not map input buffer");
return GST_FLOW_ERROR;
}
total_consumed = 0;
while (total_consumed < map.size) {
res = gst_av1_parser_identify_one_obu (priv->parser,
map.data + total_consumed, map.size, &obu, &consumed);
if (res != GST_AV1_PARSER_OK) {
ret = GST_FLOW_ERROR;
goto out;
}
ret = gst_av1_decoder_decode_one_obu (self, &obu);
if (ret != GST_FLOW_OK) {
goto out;
}
total_consumed += consumed;
}
if (!priv->current_picture) {
GST_ERROR_OBJECT (self, "No valid picture after exhaust input frame");
ret = GST_FLOW_ERROR;
goto out;
}
if (!priv->current_picture->frame_hdr.show_existing_frame) {
if (klass->end_picture) {
ret = klass->end_picture (self, priv->current_picture);
if (ret != GST_FLOW_OK) {
GST_WARNING_OBJECT (self, "end picture error");
goto out;
}
}
}
gst_av1_decoder_update_state (self);
out:
gst_buffer_unmap (in_buf, &map);
if (ret == GST_FLOW_OK) {
if (priv->current_picture->frame_hdr.show_frame ||
priv->current_picture->frame_hdr.show_existing_frame) {
/* Only output one frame with the highest spatial id from each TU
* when there are multiple spatial layers.
*/
if (priv->parser->state.operating_point_idc &&
obu.header.obu_spatial_id <
_floor_log2 (priv->parser->state.operating_point_idc >> 8)) {
gst_av1_picture_unref (priv->current_picture);
gst_video_decoder_release_frame (decoder, frame);
} else {
g_assert (klass->output_picture);
/* transfer ownership of frame and picture */
ret = klass->output_picture (self, frame, priv->current_picture);
}
} else {
GST_LOG_OBJECT (self, "Decode only picture %p", priv->current_picture);
GST_VIDEO_CODEC_FRAME_SET_DECODE_ONLY (frame);
gst_av1_picture_unref (priv->current_picture);
ret = gst_video_decoder_finish_frame (GST_VIDEO_DECODER (self), frame);
}
} else {
if (priv->current_picture)
gst_av1_picture_unref (priv->current_picture);
gst_video_decoder_drop_frame (decoder, frame);
}
priv->current_picture = NULL;
priv->current_frame = NULL;
if (ret == GST_FLOW_ERROR) {
GST_VIDEO_DECODER_ERROR (decoder, 1, STREAM, DECODE,
("Failed to handle the frame %d", frame->system_frame_number),
NULL, ret);
}
return ret;
}