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codecs: vp9decoder: Relying on upstream vp9parse for super frame handling

Browse source 
By this way, we can simplify the decoding flow. Moreover, we don't
need to worry about the case where multiple visible-frames are
composed in one super-frame, since upstream vp9parse will split
them per frame unit.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1567>
This commit is contained in:
Seungha Yang 2020-09-10 21:19:43 +09:00 committed by GStreamer Merge Bot
parent 95db5e7182
commit 7f10f8a93e
1 changed files with 73 additions and 143 deletions
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118
gst-libs/gst/codecs/gstvp9decoder.c
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@ -276,16 +276,11 @@ gst_vp9_decoder_handle_frame (GstVideoDecoder * decoder,
GstVp9DecoderClass *klass = GST_VP9_DECODER_GET_CLASS (self);
GstVp9DecoderPrivate *priv = self->priv;
GstBuffer *in_buf = frame->input_buffer;
GstVp9FrameHdr frame_hdr[GST_VP9_MAX_FRAMES_IN_SUPERFRAME];
GstVp9FrameHdr frame_hdr;
GstVp9Picture *picture = NULL;
GstVp9FrameHdr *cur_hdr;
GstVp9ParserResult pres;
GstVp9SuperframeInfo superframe_info;
GstMapInfo map;
GstFlowReturn ret = GST_FLOW_OK;
gint i;
gsize offset = 0;
gint frame_idx_to_consume = 0;
GST_LOG_OBJECT (self, "handle frame %" GST_PTR_FORMAT, in_buf);
@ -294,61 +289,25 @@ gst_vp9_decoder_handle_frame (GstVideoDecoder * decoder,
goto error;
}
pres = gst_vp9_parser_parse_superframe_info (priv->parser,
&superframe_info, map.data, map.size);
pres = gst_vp9_parser_parse_frame_header (priv->parser, &frame_hdr,
map.data, map.size);
if (pres != GST_VP9_PARSER_OK) {
GST_ERROR_OBJECT (self, "Failed to parse superframe header");
GST_ERROR_OBJECT (self, "Failed to parsing frame header");
goto unmap_and_error;
}
if (superframe_info.frames_in_superframe > 1) {
GST_LOG_OBJECT (self,
"Have %d frames in superframe", superframe_info.frames_in_superframe);
}
for (i = 0; i < superframe_info.frames_in_superframe; i++) {
pres = gst_vp9_parser_parse_frame_header (priv->parser, &frame_hdr[i],
map.data + offset, superframe_info.frame_sizes[i]);
if (pres != GST_VP9_PARSER_OK) {
GST_ERROR_OBJECT (self, "Failed to parsing frame header %d", i);
goto unmap_and_error;
}
offset += superframe_info.frame_sizes[i];
}
/* if we have multiple frames in superframe here,
* decide which frame should consume given GstVideoCodecFrame.
* In practice, superframe consists of two frame, one is decode-only frame
* and the other is normal frame. If it's not the case, existing vp9 decoder
* implementations (nvdec, vp9dec, d3d11 and so on) would
* show mismatched number of input and output buffers.
* To handle it in generic manner, we need vp9parse element to
* split frames from superframe. */
if (superframe_info.frames_in_superframe > 1) {
for (i = 0; i < superframe_info.frames_in_superframe; i++) {
if (frame_hdr[i].show_frame) {
frame_idx_to_consume = i;
break;
}
}
/* if all frames are decode-only, choose the first one
* (seems to be no possibility) */
if (i == superframe_info.frames_in_superframe)
frame_idx_to_consume = 0;
}
if (priv->wait_keyframe && frame_hdr[0].frame_type != GST_VP9_KEY_FRAME) {
if (priv->wait_keyframe && frame_hdr.frame_type != GST_VP9_KEY_FRAME) {
GST_DEBUG_OBJECT (self, "Drop frame before initial keyframe");
gst_buffer_unmap (in_buf, &map);
return gst_video_decoder_drop_frame (decoder, frame);;
gst_video_decoder_release_frame (decoder, frame);;
return GST_FLOW_OK;
}
if (frame_hdr[0].frame_type == GST_VP9_KEY_FRAME &&
!gst_vp9_decoder_check_codec_change (self, &frame_hdr[0])) {
if (frame_hdr.frame_type == GST_VP9_KEY_FRAME &&
!gst_vp9_decoder_check_codec_change (self, &frame_hdr)) {
GST_ERROR_OBJECT (self, "codec change error");
goto unmap_and_error;
}
@ -360,56 +319,37 @@ gst_vp9_decoder_handle_frame (GstVideoDecoder * decoder,
priv->wait_keyframe = FALSE;
offset = 0;
for (i = 0; i < superframe_info.frames_in_superframe; i++) {
GstVideoCodecFrame *cur_frame = NULL;
cur_hdr = &frame_hdr[i];
if (cur_hdr->show_existing_frame) {
if (frame_hdr.show_existing_frame) {
GstVp9Picture *pic_to_dup;
if (cur_hdr->frame_to_show >= GST_VP9_REF_FRAMES ||
!priv->dpb->pic_list[cur_hdr->frame_to_show]) {
if (frame_hdr.frame_to_show >= GST_VP9_REF_FRAMES ||
!priv->dpb->pic_list[frame_hdr.frame_to_show]) {
GST_ERROR_OBJECT (self, "Invalid frame_to_show %d",
cur_hdr->frame_to_show);
frame_hdr.frame_to_show);
goto unmap_and_error;
}
g_assert (klass->duplicate_picture);
pic_to_dup = priv->dpb->pic_list[cur_hdr->frame_to_show];
pic_to_dup = priv->dpb->pic_list[frame_hdr.frame_to_show];
picture = klass->duplicate_picture (self, pic_to_dup);
if (!picture) {
GST_ERROR_OBJECT (self, "subclass didn't provide duplicated picture");
goto unmap_and_error;
}
picture->size = 0;
if (i == frame_idx_to_consume)
cur_frame = gst_video_codec_frame_ref (frame);
g_assert (klass->output_picture);
/* transfer ownership of picture */
ret = klass->output_picture (self, cur_frame, picture);
picture = NULL;
} else {
picture = gst_vp9_picture_new ();
picture->frame_hdr = *cur_hdr;
picture->frame_hdr = frame_hdr;
picture->data = map.data + offset;
picture->size = superframe_info.frame_sizes[i];
picture->data = map.data;
picture->size = map.size;
picture->subsampling_x = priv->parser->subsampling_x;
picture->subsampling_y = priv->parser->subsampling_y;
picture->bit_depth = priv->parser->bit_depth;
if (i == frame_idx_to_consume)
cur_frame = gst_video_codec_frame_ref (frame);
if (klass->new_picture) {
if (!klass->new_picture (self, cur_frame, picture)) {
if (!klass->new_picture (self, frame, picture)) {
GST_ERROR_OBJECT (self, "new picture error");
goto unmap_and_error;
}
@ -441,24 +381,14 @@ gst_vp9_decoder_handle_frame (GstVideoDecoder * decoder,
* (i.e., not a reference frame), gst_vp9_dpb_add() will take care of
* the case as well */
gst_vp9_dpb_add (priv->dpb, gst_vp9_picture_ref (picture));
g_assert (klass->output_picture);
/* transfer ownership of picture */
ret = klass->output_picture (self, cur_frame, picture);
picture = NULL;
}
if (ret != GST_FLOW_OK)
break;
offset += superframe_info.frame_sizes[i];
}
gst_buffer_unmap (in_buf, &map);
gst_video_codec_frame_unref (frame);
return ret;
g_assert (klass->output_picture);
/* transfer ownership of frame and picture */
return klass->output_picture (self, frame, picture);
unmap_and_error:
{