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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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boolean return value is not sufficient for representing the reason of error in most cases. For instance, any errors around new_sequence() would mean negotiation error, not just *ERROR*. And some subclasses will allocate buffer/memory/surface on new_picture() but it could be failed because of expected error, likely flushing Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1019>
1523 lines
49 KiB
C
1523 lines
49 KiB
C
/* GStreamer
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* Copyright (C) 2020 Nicolas Dufresne <nicolas.dufresne@collabora.com>
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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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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "gstv4l2codecallocator.h"
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#include "gstv4l2codech264dec.h"
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#include "gstv4l2codecpool.h"
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#include "linux/v4l2-controls.h"
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#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
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#define V4L2_MIN_KERNEL_VER_MAJOR 5
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#define V4L2_MIN_KERNEL_VER_MINOR 11
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#define V4L2_MIN_KERNEL_VERSION KERNEL_VERSION(V4L2_MIN_KERNEL_VER_MAJOR, V4L2_MIN_KERNEL_VER_MINOR, 0)
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GST_DEBUG_CATEGORY_STATIC (v4l2_h264dec_debug);
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#define GST_CAT_DEFAULT v4l2_h264dec_debug
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enum
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{
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PROP_0,
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PROP_LAST = PROP_0
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};
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static GstStaticPadTemplate sink_template =
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GST_STATIC_PAD_TEMPLATE (GST_VIDEO_DECODER_SINK_NAME,
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GST_PAD_SINK, GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-h264, "
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"stream-format=(string) { avc, avc3, byte-stream }, "
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"alignment=(string) au")
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);
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static GstStaticPadTemplate src_template =
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GST_STATIC_PAD_TEMPLATE (GST_VIDEO_DECODER_SRC_NAME,
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GST_PAD_SRC, GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ NV12, YUY2, NV12_32L32 }")));
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struct _GstV4l2CodecH264Dec
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{
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GstH264Decoder parent;
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GstV4l2Decoder *decoder;
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GstVideoCodecState *output_state;
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GstVideoInfo vinfo;
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gint display_width;
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gint display_height;
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gint coded_width;
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gint coded_height;
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guint bitdepth;
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guint chroma_format_idc;
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guint num_slices;
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gboolean first_slice;
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GstV4l2CodecAllocator *sink_allocator;
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GstV4l2CodecAllocator *src_allocator;
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GstV4l2CodecPool *src_pool;
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gint min_pool_size;
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gboolean has_videometa;
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gboolean need_negotiation;
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gboolean interlaced;
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gboolean need_sequence;
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gboolean copy_frames;
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gboolean scaling_matrix_present;
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struct v4l2_ctrl_h264_sps sps;
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struct v4l2_ctrl_h264_pps pps;
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struct v4l2_ctrl_h264_scaling_matrix scaling_matrix;
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struct v4l2_ctrl_h264_decode_params decode_params;
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struct v4l2_ctrl_h264_pred_weights pred_weight;
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GArray *slice_params;
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enum v4l2_stateless_h264_decode_mode decode_mode;
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enum v4l2_stateless_h264_start_code start_code;
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GstMemory *bitstream;
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GstMapInfo bitstream_map;
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};
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G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GstV4l2CodecH264Dec,
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gst_v4l2_codec_h264_dec, GST_TYPE_H264_DECODER,
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GST_DEBUG_CATEGORY_INIT (v4l2_h264dec_debug, "v4l2codecs-h264dec", 0,
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"V4L2 stateless h264 decoder"));
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#define parent_class gst_v4l2_codec_h264_dec_parent_class
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static gboolean
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is_frame_based (GstV4l2CodecH264Dec * self)
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{
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return self->decode_mode == V4L2_STATELESS_H264_DECODE_MODE_FRAME_BASED;
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}
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static gboolean
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is_slice_based (GstV4l2CodecH264Dec * self)
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{
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return self->decode_mode == V4L2_STATELESS_H264_DECODE_MODE_SLICE_BASED;
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}
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static gboolean
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needs_start_codes (GstV4l2CodecH264Dec * self)
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{
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return self->start_code == V4L2_STATELESS_H264_START_CODE_ANNEX_B;
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}
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static gboolean
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gst_v4l2_decoder_h264_api_check (GstV4l2CodecH264Dec * self)
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{
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guint i, ret_size;
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/* *INDENT-OFF* */
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struct
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{
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unsigned int id;
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unsigned int size;
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} controls[] = {
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{
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.id = V4L2_CID_STATELESS_H264_SPS,
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.size = sizeof(struct v4l2_ctrl_h264_sps),
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}, {
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.id = V4L2_CID_STATELESS_H264_PPS,
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.size = sizeof(struct v4l2_ctrl_h264_pps),
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}, {
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.id = V4L2_CID_STATELESS_H264_SCALING_MATRIX,
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.size = sizeof(struct v4l2_ctrl_h264_scaling_matrix),
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}, {
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.id = V4L2_CID_STATELESS_H264_DECODE_PARAMS,
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.size = sizeof(struct v4l2_ctrl_h264_decode_params),
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}, {
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.id = V4L2_CID_STATELESS_H264_SLICE_PARAMS,
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.size = sizeof(struct v4l2_ctrl_h264_slice_params),
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}, {
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.id = V4L2_CID_STATELESS_H264_PRED_WEIGHTS,
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.size = sizeof(struct v4l2_ctrl_h264_pred_weights),
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}
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};
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/* *INDENT-ON* */
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/*
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* Compatibility check: make sure the pointer controls are
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* the right size.
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*/
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for (i = 0; i < G_N_ELEMENTS (controls); i++) {
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if (gst_v4l2_decoder_query_control_size (self->decoder, controls[i].id,
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&ret_size) && ret_size != controls[i].size) {
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GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ_WRITE,
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("H264 API mismatch!"),
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("%d control size mismatch: got %d bytes but %d expected.",
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controls[i].id, ret_size, controls[i].size));
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return FALSE;
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}
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}
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return TRUE;
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}
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static gboolean
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gst_v4l2_codec_h264_dec_open (GstVideoDecoder * decoder)
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{
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GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
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guint version;
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/* *INDENT-OFF* */
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struct v4l2_ext_control control[] = {
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{
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.id = V4L2_CID_STATELESS_H264_DECODE_MODE,
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},
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{
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.id = V4L2_CID_STATELESS_H264_START_CODE,
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},
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};
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/* *INDENT-ON* */
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if (!gst_v4l2_decoder_open (self->decoder)) {
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GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ_WRITE,
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("Failed to open H264 decoder"),
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("gst_v4l2_decoder_open() failed: %s", g_strerror (errno)));
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return FALSE;
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}
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version = gst_v4l2_decoder_get_version (self->decoder);
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if (version < V4L2_MIN_KERNEL_VERSION)
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GST_WARNING_OBJECT (self,
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"V4L2 API v%u.%u too old, at least v%u.%u required",
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(version >> 16) & 0xff, (version >> 8) & 0xff,
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V4L2_MIN_KERNEL_VER_MAJOR, V4L2_MIN_KERNEL_VER_MINOR);
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if (!gst_v4l2_decoder_h264_api_check (self)) {
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GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ_WRITE,
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("Failed to open H264 decoder"),
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("gst_v4l2_decoder_h264_api_check() failed"));
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return FALSE;
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}
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if (!gst_v4l2_decoder_get_controls (self->decoder, control,
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G_N_ELEMENTS (control))) {
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GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ_WRITE,
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("Driver did not report framing and start code method."),
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("gst_v4l2_decoder_get_controls() failed: %s", g_strerror (errno)));
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return FALSE;
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}
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self->decode_mode = control[0].value;
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self->start_code = control[1].value;
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GST_INFO_OBJECT (self, "Opened H264 %s decoder %s",
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is_frame_based (self) ? "frame based" : "slice based",
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needs_start_codes (self) ? "using start-codes" : "without start-codes");
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gst_h264_decoder_set_process_ref_pic_lists (GST_H264_DECODER (self),
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is_slice_based (self));
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return TRUE;
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}
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static gboolean
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gst_v4l2_codec_h264_dec_close (GstVideoDecoder * decoder)
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{
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GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
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gst_v4l2_decoder_close (self->decoder);
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return TRUE;
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}
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static void
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gst_v4l2_codec_h264_dec_reset_allocation (GstV4l2CodecH264Dec * self)
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{
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if (self->sink_allocator) {
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gst_v4l2_codec_allocator_detach (self->sink_allocator);
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g_clear_object (&self->sink_allocator);
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}
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if (self->src_allocator) {
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gst_v4l2_codec_allocator_detach (self->src_allocator);
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g_clear_object (&self->src_allocator);
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g_clear_object (&self->src_pool);
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}
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}
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static gboolean
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gst_v4l2_codec_h264_dec_stop (GstVideoDecoder * decoder)
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{
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GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
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gst_v4l2_decoder_streamoff (self->decoder, GST_PAD_SINK);
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gst_v4l2_decoder_streamoff (self->decoder, GST_PAD_SRC);
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gst_v4l2_codec_h264_dec_reset_allocation (self);
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if (self->output_state)
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gst_video_codec_state_unref (self->output_state);
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self->output_state = NULL;
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return GST_VIDEO_DECODER_CLASS (parent_class)->stop (decoder);
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}
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static gint
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get_pixel_bitdepth (GstV4l2CodecH264Dec * self)
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{
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gint depth;
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switch (self->chroma_format_idc) {
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case 0:
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/* 4:0:0 */
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depth = self->bitdepth;
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break;
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case 1:
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/* 4:2:0 */
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depth = self->bitdepth + self->bitdepth / 2;
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break;
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case 2:
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/* 4:2:2 */
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depth = 2 * self->bitdepth;
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break;
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case 3:
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/* 4:4:4 */
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depth = 3 * self->bitdepth;
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break;
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default:
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GST_WARNING_OBJECT (self, "Unsupported chroma format %i",
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self->chroma_format_idc);
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depth = 0;
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break;
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}
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return depth;
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}
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static gboolean
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gst_v4l2_codec_h264_dec_negotiate (GstVideoDecoder * decoder)
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{
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GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
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GstH264Decoder *h264dec = GST_H264_DECODER (decoder);
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/* *INDENT-OFF* */
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struct v4l2_ext_control control[] = {
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{
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.id = V4L2_CID_STATELESS_H264_SPS,
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.ptr = &self->sps,
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.size = sizeof (self->sps),
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},
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};
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/* *INDENT-ON* */
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GstCaps *filter, *caps;
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/* Ignore downstream renegotiation request. */
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if (!self->need_negotiation)
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return TRUE;
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self->need_negotiation = FALSE;
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GST_DEBUG_OBJECT (self, "Negotiate");
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gst_v4l2_codec_h264_dec_reset_allocation (self);
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gst_v4l2_decoder_streamoff (self->decoder, GST_PAD_SINK);
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gst_v4l2_decoder_streamoff (self->decoder, GST_PAD_SRC);
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if (!gst_v4l2_decoder_set_sink_fmt (self->decoder, V4L2_PIX_FMT_H264_SLICE,
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self->coded_width, self->coded_height, get_pixel_bitdepth (self))) {
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GST_ELEMENT_ERROR (self, CORE, NEGOTIATION,
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("Failed to configure H264 decoder"),
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("gst_v4l2_decoder_set_sink_fmt() failed: %s", g_strerror (errno)));
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gst_v4l2_decoder_close (self->decoder);
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return FALSE;
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}
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if (!gst_v4l2_decoder_set_controls (self->decoder, NULL, control,
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G_N_ELEMENTS (control))) {
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GST_ELEMENT_ERROR (decoder, RESOURCE, WRITE,
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("Driver does not support the selected stream."), (NULL));
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return FALSE;
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}
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filter = gst_v4l2_decoder_enum_src_formats (self->decoder);
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if (!filter) {
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GST_ELEMENT_ERROR (self, CORE, NEGOTIATION,
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("No supported decoder output formats"), (NULL));
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return FALSE;
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}
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GST_DEBUG_OBJECT (self, "Supported output formats: %" GST_PTR_FORMAT, filter);
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caps = gst_pad_peer_query_caps (decoder->srcpad, filter);
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gst_caps_unref (filter);
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GST_DEBUG_OBJECT (self, "Peer supported formats: %" GST_PTR_FORMAT, caps);
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if (!gst_v4l2_decoder_select_src_format (self->decoder, caps, &self->vinfo)) {
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GST_ELEMENT_ERROR (self, CORE, NEGOTIATION,
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("Unsupported bitdepth/chroma format"),
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("No support for %ux%u %ubit chroma IDC %i", self->coded_width,
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self->coded_height, self->bitdepth, self->chroma_format_idc));
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gst_caps_unref (caps);
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return FALSE;
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}
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gst_caps_unref (caps);
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if (self->output_state)
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gst_video_codec_state_unref (self->output_state);
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self->output_state =
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gst_video_decoder_set_output_state (GST_VIDEO_DECODER (self),
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self->vinfo.finfo->format, self->display_width,
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self->display_height, h264dec->input_state);
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if (self->interlaced)
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self->output_state->info.interlace_mode = GST_VIDEO_INTERLACE_MODE_MIXED;
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self->output_state->caps = gst_video_info_to_caps (&self->output_state->info);
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if (GST_VIDEO_DECODER_CLASS (parent_class)->negotiate (decoder)) {
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if (!gst_v4l2_decoder_streamon (self->decoder, GST_PAD_SINK)) {
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GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
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("Could not enable the decoder driver."),
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("VIDIOC_STREAMON(SINK) failed: %s", g_strerror (errno)));
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return FALSE;
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}
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if (!gst_v4l2_decoder_streamon (self->decoder, GST_PAD_SRC)) {
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GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
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("Could not enable the decoder driver."),
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("VIDIOC_STREAMON(SRC) failed: %s", g_strerror (errno)));
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return FALSE;
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}
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return TRUE;
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}
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return FALSE;
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}
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static gboolean
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gst_v4l2_codec_h264_dec_decide_allocation (GstVideoDecoder * decoder,
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GstQuery * query)
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{
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GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
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guint min = 0, num_bitstream;
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self->has_videometa = gst_query_find_allocation_meta (query,
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GST_VIDEO_META_API_TYPE, NULL);
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g_clear_object (&self->src_pool);
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g_clear_object (&self->src_allocator);
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if (gst_query_get_n_allocation_pools (query) > 0)
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gst_query_parse_nth_allocation_pool (query, 0, NULL, NULL, &min, NULL);
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min = MAX (2, min);
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num_bitstream = 1 +
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MAX (1, gst_v4l2_decoder_get_render_delay (self->decoder));
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self->sink_allocator = gst_v4l2_codec_allocator_new (self->decoder,
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GST_PAD_SINK, num_bitstream);
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self->src_allocator = gst_v4l2_codec_allocator_new (self->decoder,
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GST_PAD_SRC, self->min_pool_size + min + 4);
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self->src_pool = gst_v4l2_codec_pool_new (self->src_allocator, &self->vinfo);
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/* Our buffer pool is internal, we will let the base class create a video
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* pool, and use it if we are running out of buffers or if downstream does
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* not support GstVideoMeta */
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return GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation
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(decoder, query);
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}
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static void
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gst_v4l2_codec_h264_dec_fill_sequence (GstV4l2CodecH264Dec * self,
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const GstH264SPS * sps)
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{
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gint i;
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|
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/* *INDENT-OFF* */
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self->sps = (struct v4l2_ctrl_h264_sps) {
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.profile_idc = sps->profile_idc,
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.constraint_set_flags = (sps->constraint_set0_flag)
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| (sps->constraint_set1_flag << 1) | (sps->constraint_set2_flag << 2)
|
|
| (sps->constraint_set3_flag << 3) | (sps->constraint_set4_flag << 4)
|
|
| (sps->constraint_set5_flag << 5),
|
|
.level_idc = sps->level_idc,
|
|
.seq_parameter_set_id = sps->id,
|
|
.chroma_format_idc = sps->chroma_format_idc,
|
|
.bit_depth_luma_minus8 = sps->bit_depth_luma_minus8,
|
|
.bit_depth_chroma_minus8 = sps->bit_depth_chroma_minus8,
|
|
.log2_max_frame_num_minus4 = sps->log2_max_frame_num_minus4,
|
|
.pic_order_cnt_type = sps->pic_order_cnt_type,
|
|
.log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_pic_order_cnt_lsb_minus4,
|
|
.max_num_ref_frames = sps->num_ref_frames,
|
|
.num_ref_frames_in_pic_order_cnt_cycle = sps->num_ref_frames_in_pic_order_cnt_cycle,
|
|
.offset_for_non_ref_pic = sps->offset_for_non_ref_pic,
|
|
.offset_for_top_to_bottom_field = sps->offset_for_top_to_bottom_field,
|
|
.pic_width_in_mbs_minus1 = sps->pic_width_in_mbs_minus1,
|
|
.pic_height_in_map_units_minus1 = sps->pic_height_in_map_units_minus1,
|
|
.flags = (sps->separate_colour_plane_flag ? V4L2_H264_SPS_FLAG_SEPARATE_COLOUR_PLANE : 0)
|
|
| (sps->qpprime_y_zero_transform_bypass_flag ? V4L2_H264_SPS_FLAG_QPPRIME_Y_ZERO_TRANSFORM_BYPASS : 0)
|
|
| (sps->delta_pic_order_always_zero_flag ? V4L2_H264_SPS_FLAG_DELTA_PIC_ORDER_ALWAYS_ZERO : 0)
|
|
| (sps->gaps_in_frame_num_value_allowed_flag ? V4L2_H264_SPS_FLAG_GAPS_IN_FRAME_NUM_VALUE_ALLOWED : 0)
|
|
| (sps->frame_mbs_only_flag ? V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY : 0)
|
|
| (sps->mb_adaptive_frame_field_flag ? V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD : 0)
|
|
| (sps->direct_8x8_inference_flag ? V4L2_H264_SPS_FLAG_DIRECT_8X8_INFERENCE : 0),
|
|
};
|
|
/* *INDENT-ON* */
|
|
|
|
for (i = 0; i < sps->num_ref_frames_in_pic_order_cnt_cycle; i++)
|
|
self->sps.offset_for_ref_frame[i] = sps->offset_for_ref_frame[i];
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_codec_h264_dec_fill_pps (GstV4l2CodecH264Dec * self, GstH264PPS * pps)
|
|
{
|
|
/* *INDENT-OFF* */
|
|
self->pps = (struct v4l2_ctrl_h264_pps) {
|
|
.pic_parameter_set_id = pps->id,
|
|
.seq_parameter_set_id = pps->sequence->id,
|
|
.num_slice_groups_minus1 = pps->num_slice_groups_minus1,
|
|
.num_ref_idx_l0_default_active_minus1 = pps->num_ref_idx_l0_active_minus1,
|
|
.num_ref_idx_l1_default_active_minus1 = pps->num_ref_idx_l1_active_minus1,
|
|
.weighted_bipred_idc = pps->weighted_bipred_idc,
|
|
.pic_init_qp_minus26 = pps->pic_init_qp_minus26,
|
|
.pic_init_qs_minus26 = pps->pic_init_qs_minus26,
|
|
.chroma_qp_index_offset = pps->chroma_qp_index_offset,
|
|
.second_chroma_qp_index_offset = pps->second_chroma_qp_index_offset,
|
|
.flags = 0
|
|
| (pps->entropy_coding_mode_flag ? V4L2_H264_PPS_FLAG_ENTROPY_CODING_MODE : 0)
|
|
| (pps->pic_order_present_flag ? V4L2_H264_PPS_FLAG_BOTTOM_FIELD_PIC_ORDER_IN_FRAME_PRESENT : 0)
|
|
| (pps->weighted_pred_flag ? V4L2_H264_PPS_FLAG_WEIGHTED_PRED : 0)
|
|
| (pps->deblocking_filter_control_present_flag ? V4L2_H264_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT : 0)
|
|
| (pps->constrained_intra_pred_flag ? V4L2_H264_PPS_FLAG_CONSTRAINED_INTRA_PRED : 0)
|
|
| (pps->redundant_pic_cnt_present_flag ? V4L2_H264_PPS_FLAG_REDUNDANT_PIC_CNT_PRESENT : 0)
|
|
| (pps->transform_8x8_mode_flag ? V4L2_H264_PPS_FLAG_TRANSFORM_8X8_MODE : 0)
|
|
| (self->scaling_matrix_present ? V4L2_H264_PPS_FLAG_SCALING_MATRIX_PRESENT : 0),
|
|
};
|
|
/* *INDENT-ON* */
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_codec_h264_dec_fill_scaling_matrix (GstV4l2CodecH264Dec * self,
|
|
GstH264PPS * pps)
|
|
{
|
|
gint i, n;
|
|
|
|
for (i = 0; i < G_N_ELEMENTS (pps->scaling_lists_4x4); i++)
|
|
gst_h264_quant_matrix_4x4_get_raster_from_zigzag (self->
|
|
scaling_matrix.scaling_list_4x4[i], pps->scaling_lists_4x4[i]);
|
|
|
|
/* Avoid uninitialize data passed into ioctl() */
|
|
memset (self->scaling_matrix.scaling_list_8x8, 0,
|
|
sizeof (self->scaling_matrix.scaling_list_8x8));
|
|
|
|
/* We need the first 2 entries (Y intra and Y inter for YCbCr 4:2:2 and
|
|
* less, and the full 6 entries for 4:4:4, see Table 7-2 of the spec for
|
|
* more details */
|
|
n = (pps->sequence->chroma_format_idc == 3) ? 6 : 2;
|
|
for (i = 0; i < n; i++)
|
|
gst_h264_quant_matrix_8x8_get_raster_from_zigzag (self->
|
|
scaling_matrix.scaling_list_8x8[i], pps->scaling_lists_8x8[i]);
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_codec_h264_dec_fill_decoder_params (GstV4l2CodecH264Dec * self,
|
|
GstH264SliceHdr * slice_hdr, GstH264Picture * picture, GstH264Dpb * dpb)
|
|
{
|
|
GArray *refs = gst_h264_dpb_get_pictures_all (dpb);
|
|
gint i, entry_id = 0;
|
|
|
|
/* *INDENT-OFF* */
|
|
self->decode_params = (struct v4l2_ctrl_h264_decode_params) {
|
|
.nal_ref_idc = picture->nal_ref_idc,
|
|
.frame_num = slice_hdr->frame_num,
|
|
.idr_pic_id = slice_hdr->idr_pic_id,
|
|
.pic_order_cnt_lsb = slice_hdr->pic_order_cnt_lsb,
|
|
.delta_pic_order_cnt_bottom = slice_hdr->delta_pic_order_cnt_bottom,
|
|
.delta_pic_order_cnt0 = slice_hdr->delta_pic_order_cnt[0],
|
|
.delta_pic_order_cnt1 = slice_hdr->delta_pic_order_cnt[1],
|
|
.dec_ref_pic_marking_bit_size = slice_hdr->dec_ref_pic_marking.bit_size,
|
|
.pic_order_cnt_bit_size = slice_hdr->pic_order_cnt_bit_size,
|
|
.slice_group_change_cycle = slice_hdr->slice_group_change_cycle,
|
|
.flags = (picture->idr ? V4L2_H264_DECODE_PARAM_FLAG_IDR_PIC : 0) |
|
|
(slice_hdr->field_pic_flag ? V4L2_H264_DECODE_PARAM_FLAG_FIELD_PIC : 0) |
|
|
(slice_hdr->bottom_field_flag ? V4L2_H264_DECODE_PARAM_FLAG_BOTTOM_FIELD : 0),
|
|
};
|
|
|
|
switch (picture->field) {
|
|
case GST_H264_PICTURE_FIELD_FRAME:
|
|
self->decode_params.top_field_order_cnt = picture->top_field_order_cnt;
|
|
self->decode_params.bottom_field_order_cnt =
|
|
picture->bottom_field_order_cnt;
|
|
break;
|
|
case GST_H264_PICTURE_FIELD_TOP_FIELD:
|
|
self->decode_params.top_field_order_cnt = picture->top_field_order_cnt;
|
|
self->decode_params.bottom_field_order_cnt = 0;
|
|
break;
|
|
case GST_H264_PICTURE_FIELD_BOTTOM_FIELD:
|
|
self->decode_params.top_field_order_cnt = 0;
|
|
self->decode_params.bottom_field_order_cnt =
|
|
picture->bottom_field_order_cnt;
|
|
break;
|
|
}
|
|
|
|
for (i = 0; i < refs->len; i++) {
|
|
GstH264Picture *ref_pic = g_array_index (refs, GstH264Picture *, i);
|
|
gint pic_num = ref_pic->pic_num;
|
|
struct v4l2_h264_dpb_entry *entry;
|
|
|
|
/* Skip non-reference as they are not useful to decoding */
|
|
if (!GST_H264_PICTURE_IS_REF (ref_pic))
|
|
continue;
|
|
|
|
/* The second field picture will be handled differently */
|
|
if (ref_pic->second_field)
|
|
continue;
|
|
|
|
entry = &self->decode_params.dpb[entry_id++];
|
|
*entry = (struct v4l2_h264_dpb_entry) {
|
|
/*
|
|
* The reference is multiplied by 1000 because it's wassed as micro
|
|
* seconds and this TS is nanosecond.
|
|
*/
|
|
.reference_ts = (guint64) ref_pic->system_frame_number * 1000,
|
|
.frame_num = ref_pic->frame_num,
|
|
.pic_num = pic_num,
|
|
.flags = V4L2_H264_DPB_ENTRY_FLAG_VALID
|
|
| (GST_H264_PICTURE_IS_REF (ref_pic) ? V4L2_H264_DPB_ENTRY_FLAG_ACTIVE : 0)
|
|
| (GST_H264_PICTURE_IS_LONG_TERM_REF (ref_pic) ? V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM : 0),
|
|
};
|
|
|
|
switch (ref_pic->field) {
|
|
case GST_H264_PICTURE_FIELD_FRAME:
|
|
entry->top_field_order_cnt = ref_pic->top_field_order_cnt;
|
|
entry->bottom_field_order_cnt = ref_pic->bottom_field_order_cnt;
|
|
entry->fields = V4L2_H264_FRAME_REF;
|
|
break;
|
|
case GST_H264_PICTURE_FIELD_TOP_FIELD:
|
|
entry->top_field_order_cnt = ref_pic->top_field_order_cnt;
|
|
entry->fields = V4L2_H264_TOP_FIELD_REF;
|
|
|
|
if (ref_pic->other_field) {
|
|
entry->bottom_field_order_cnt =
|
|
ref_pic->other_field->bottom_field_order_cnt;
|
|
entry->fields |= V4L2_H264_BOTTOM_FIELD_REF;
|
|
} else {
|
|
entry->flags |= V4L2_H264_DPB_ENTRY_FLAG_FIELD;
|
|
}
|
|
break;
|
|
case GST_H264_PICTURE_FIELD_BOTTOM_FIELD:
|
|
entry->bottom_field_order_cnt = ref_pic->bottom_field_order_cnt;
|
|
entry->fields = V4L2_H264_BOTTOM_FIELD_REF;
|
|
|
|
if (ref_pic->other_field) {
|
|
entry->top_field_order_cnt =
|
|
ref_pic->other_field->top_field_order_cnt;
|
|
entry->fields |= V4L2_H264_TOP_FIELD_REF;
|
|
} else {
|
|
entry->flags |= V4L2_H264_DPB_ENTRY_FLAG_FIELD;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
/* *INDENT-ON* */
|
|
|
|
g_array_unref (refs);
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_codec_h264_dec_fill_pred_weight (GstV4l2CodecH264Dec * self,
|
|
GstH264SliceHdr * slice_hdr)
|
|
{
|
|
gint i, j;
|
|
|
|
/* *INDENT-OFF* */
|
|
self->pred_weight = (struct v4l2_ctrl_h264_pred_weights) {
|
|
.luma_log2_weight_denom = slice_hdr->pred_weight_table.luma_log2_weight_denom,
|
|
.chroma_log2_weight_denom = slice_hdr->pred_weight_table.chroma_log2_weight_denom,
|
|
};
|
|
/* *INDENT-ON* */
|
|
|
|
for (i = 0; i <= slice_hdr->num_ref_idx_l0_active_minus1; i++) {
|
|
self->pred_weight.weight_factors[0].luma_weight[i] =
|
|
slice_hdr->pred_weight_table.luma_weight_l0[i];
|
|
self->pred_weight.weight_factors[0].luma_offset[i] =
|
|
slice_hdr->pred_weight_table.luma_offset_l0[i];
|
|
}
|
|
|
|
if (slice_hdr->pps->sequence->chroma_array_type != 0) {
|
|
for (i = 0; i <= slice_hdr->num_ref_idx_l0_active_minus1; i++) {
|
|
for (j = 0; j < 2; j++) {
|
|
self->pred_weight.weight_factors[0].chroma_weight[i][j] =
|
|
slice_hdr->pred_weight_table.chroma_weight_l0[i][j];
|
|
self->pred_weight.weight_factors[0].chroma_offset[i][j] =
|
|
slice_hdr->pred_weight_table.chroma_offset_l0[i][j];
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Skip l1 if this is not a B-Frames. */
|
|
if (slice_hdr->type % 5 != GST_H264_B_SLICE)
|
|
return;
|
|
|
|
for (i = 0; i <= slice_hdr->num_ref_idx_l1_active_minus1; i++) {
|
|
self->pred_weight.weight_factors[1].luma_weight[i] =
|
|
slice_hdr->pred_weight_table.luma_weight_l1[i];
|
|
self->pred_weight.weight_factors[1].luma_offset[i] =
|
|
slice_hdr->pred_weight_table.luma_offset_l1[i];
|
|
}
|
|
|
|
if (slice_hdr->pps->sequence->chroma_array_type != 0) {
|
|
for (i = 0; i <= slice_hdr->num_ref_idx_l1_active_minus1; i++) {
|
|
for (j = 0; j < 2; j++) {
|
|
self->pred_weight.weight_factors[1].chroma_weight[i][j] =
|
|
slice_hdr->pred_weight_table.chroma_weight_l1[i][j];
|
|
self->pred_weight.weight_factors[1].chroma_offset[i][j] =
|
|
slice_hdr->pred_weight_table.chroma_offset_l1[i][j];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static guint
|
|
get_slice_header_bit_size (GstH264Slice * slice)
|
|
{
|
|
return 8 * slice->nalu.header_bytes + slice->header.header_size
|
|
- 8 * slice->header.n_emulation_prevention_bytes;
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_codec_h264_dec_fill_slice_params (GstV4l2CodecH264Dec * self,
|
|
GstH264Slice * slice)
|
|
{
|
|
gint n = self->num_slices++;
|
|
gsize slice_size = slice->nalu.size;
|
|
struct v4l2_ctrl_h264_slice_params *params;
|
|
|
|
/* Ensure array is large enough */
|
|
if (self->slice_params->len < self->num_slices)
|
|
g_array_set_size (self->slice_params, self->slice_params->len * 2);
|
|
|
|
if (needs_start_codes (self))
|
|
slice_size += 3;
|
|
|
|
/* *INDENT-OFF* */
|
|
params = &g_array_index (self->slice_params, struct v4l2_ctrl_h264_slice_params, n);
|
|
*params = (struct v4l2_ctrl_h264_slice_params) {
|
|
.header_bit_size = get_slice_header_bit_size (slice),
|
|
.first_mb_in_slice = slice->header.first_mb_in_slice,
|
|
.slice_type = slice->header.type % 5,
|
|
.colour_plane_id = slice->header.colour_plane_id,
|
|
.redundant_pic_cnt = slice->header.redundant_pic_cnt,
|
|
.cabac_init_idc = slice->header.cabac_init_idc,
|
|
.slice_qp_delta = slice->header.slice_qp_delta,
|
|
.slice_qs_delta = slice->header.slice_qs_delta,
|
|
.disable_deblocking_filter_idc = slice->header.disable_deblocking_filter_idc,
|
|
.slice_alpha_c0_offset_div2 = slice->header.slice_alpha_c0_offset_div2,
|
|
.slice_beta_offset_div2 = slice->header.slice_beta_offset_div2,
|
|
.num_ref_idx_l0_active_minus1 = slice->header.num_ref_idx_l0_active_minus1,
|
|
.num_ref_idx_l1_active_minus1 = slice->header.num_ref_idx_l1_active_minus1,
|
|
.flags = (slice->header.direct_spatial_mv_pred_flag ? V4L2_H264_SLICE_FLAG_DIRECT_SPATIAL_MV_PRED : 0) |
|
|
(slice->header.sp_for_switch_flag ? V4L2_H264_SLICE_FLAG_SP_FOR_SWITCH : 0),
|
|
};
|
|
/* *INDENT-ON* */
|
|
}
|
|
|
|
static guint8
|
|
lookup_dpb_index (struct v4l2_h264_dpb_entry dpb[16], GstH264Picture * ref_pic)
|
|
{
|
|
guint64 ref_ts;
|
|
gint i;
|
|
|
|
/* Reference list may have wholes in case a ref is missing, we should mark
|
|
* the whole and avoid moving items in the list */
|
|
if (!ref_pic)
|
|
return 0xff;
|
|
|
|
/* DPB entries only stores first field in a merged fashion */
|
|
if (ref_pic->second_field && ref_pic->other_field)
|
|
ref_pic = ref_pic->other_field;
|
|
|
|
ref_ts = (guint64) ref_pic->system_frame_number * 1000;
|
|
for (i = 0; i < 16; i++) {
|
|
if (dpb[i].flags & V4L2_H264_DPB_ENTRY_FLAG_ACTIVE
|
|
&& dpb[i].reference_ts == ref_ts)
|
|
return i;
|
|
}
|
|
|
|
return 0xff;
|
|
}
|
|
|
|
static guint
|
|
_get_v4l2_fields_ref (GstH264Picture * ref_pic, gboolean merge)
|
|
{
|
|
if (merge && ref_pic->other_field)
|
|
return V4L2_H264_FRAME_REF;
|
|
|
|
switch (ref_pic->field) {
|
|
case GST_H264_PICTURE_FIELD_FRAME:
|
|
return V4L2_H264_FRAME_REF;
|
|
break;
|
|
case GST_H264_PICTURE_FIELD_TOP_FIELD:
|
|
return V4L2_H264_TOP_FIELD_REF;
|
|
break;
|
|
case GST_H264_PICTURE_FIELD_BOTTOM_FIELD:
|
|
return V4L2_H264_BOTTOM_FIELD_REF;
|
|
break;
|
|
}
|
|
|
|
return V4L2_H264_FRAME_REF;
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_codec_h264_dec_fill_references (GstV4l2CodecH264Dec * self,
|
|
gboolean cur_is_frame, GArray * ref_pic_list0, GArray * ref_pic_list1)
|
|
{
|
|
struct v4l2_ctrl_h264_slice_params *slice_params;
|
|
gint i;
|
|
|
|
slice_params = &g_array_index (self->slice_params,
|
|
struct v4l2_ctrl_h264_slice_params, 0);
|
|
|
|
memset (slice_params->ref_pic_list0, 0xff,
|
|
sizeof (slice_params->ref_pic_list0));
|
|
memset (slice_params->ref_pic_list1, 0xff,
|
|
sizeof (slice_params->ref_pic_list1));
|
|
|
|
for (i = 0; i < ref_pic_list0->len; i++) {
|
|
GstH264Picture *ref_pic =
|
|
g_array_index (ref_pic_list0, GstH264Picture *, i);
|
|
slice_params->ref_pic_list0[i].index =
|
|
lookup_dpb_index (self->decode_params.dpb, ref_pic);
|
|
slice_params->ref_pic_list0[i].fields =
|
|
_get_v4l2_fields_ref (ref_pic, cur_is_frame);
|
|
}
|
|
|
|
for (i = 0; i < ref_pic_list1->len; i++) {
|
|
GstH264Picture *ref_pic =
|
|
g_array_index (ref_pic_list1, GstH264Picture *, i);
|
|
slice_params->ref_pic_list1[i].index =
|
|
lookup_dpb_index (self->decode_params.dpb, ref_pic);
|
|
slice_params->ref_pic_list1[i].fields =
|
|
_get_v4l2_fields_ref (ref_pic, cur_is_frame);
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_v4l2_codec_h264_dec_new_sequence (GstH264Decoder * decoder,
|
|
const GstH264SPS * sps, gint max_dpb_size)
|
|
{
|
|
GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
|
|
gint crop_width = sps->width;
|
|
gint crop_height = sps->height;
|
|
gboolean negotiation_needed = FALSE;
|
|
gboolean interlaced;
|
|
|
|
if (self->vinfo.finfo->format == GST_VIDEO_FORMAT_UNKNOWN)
|
|
negotiation_needed = TRUE;
|
|
|
|
/* TODO check if CREATE_BUFS is supported, and simply grow the pool */
|
|
if (self->min_pool_size < max_dpb_size) {
|
|
self->min_pool_size = max_dpb_size;
|
|
negotiation_needed = TRUE;
|
|
}
|
|
|
|
if (sps->frame_cropping_flag) {
|
|
crop_width = sps->crop_rect_width;
|
|
crop_height = sps->crop_rect_height;
|
|
}
|
|
|
|
/* TODO Check if current buffers are large enough, and reuse them */
|
|
if (self->display_width != crop_width || self->display_height != crop_height
|
|
|| self->coded_width != sps->width || self->coded_height != sps->height) {
|
|
self->display_width = crop_width;
|
|
self->display_height = crop_height;
|
|
self->coded_width = sps->width;
|
|
self->coded_height = sps->height;
|
|
negotiation_needed = TRUE;
|
|
GST_INFO_OBJECT (self, "Resolution changed to %dx%d (%ix%i)",
|
|
self->display_width, self->display_height,
|
|
self->coded_width, self->coded_height);
|
|
}
|
|
|
|
interlaced = !sps->frame_mbs_only_flag;
|
|
if (self->interlaced != interlaced) {
|
|
self->interlaced = interlaced;
|
|
|
|
negotiation_needed = TRUE;
|
|
GST_INFO_OBJECT (self, "Interlaced mode changed to %d", interlaced);
|
|
}
|
|
|
|
if (self->bitdepth != sps->bit_depth_luma_minus8 + 8) {
|
|
self->bitdepth = sps->bit_depth_luma_minus8 + 8;
|
|
negotiation_needed = TRUE;
|
|
GST_INFO_OBJECT (self, "Bitdepth changed to %u", self->bitdepth);
|
|
}
|
|
|
|
if (self->chroma_format_idc != sps->chroma_format_idc) {
|
|
self->chroma_format_idc = sps->chroma_format_idc;
|
|
negotiation_needed = TRUE;
|
|
GST_INFO_OBJECT (self, "Chroma format changed to %i",
|
|
self->chroma_format_idc);
|
|
}
|
|
|
|
gst_v4l2_codec_h264_dec_fill_sequence (self, sps);
|
|
self->need_sequence = TRUE;
|
|
|
|
if (negotiation_needed) {
|
|
self->need_negotiation = TRUE;
|
|
if (!gst_video_decoder_negotiate (GST_VIDEO_DECODER (self))) {
|
|
GST_ERROR_OBJECT (self, "Failed to negotiate with downstream");
|
|
return GST_FLOW_NOT_NEGOTIATED;
|
|
}
|
|
}
|
|
|
|
/* Check if we can zero-copy buffers */
|
|
if (!self->has_videometa) {
|
|
GstVideoInfo ref_vinfo;
|
|
gint i;
|
|
|
|
gst_video_info_set_format (&ref_vinfo, GST_VIDEO_INFO_FORMAT (&self->vinfo),
|
|
self->display_width, self->display_height);
|
|
|
|
for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&self->vinfo); i++) {
|
|
if (self->vinfo.stride[i] != ref_vinfo.stride[i] ||
|
|
self->vinfo.offset[i] != ref_vinfo.offset[i]) {
|
|
GST_WARNING_OBJECT (self,
|
|
"GstVideoMeta support required, copying frames.");
|
|
self->copy_frames = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
self->copy_frames = FALSE;
|
|
}
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static gboolean
|
|
gst_v4l2_codec_h264_dec_ensure_bitstream (GstV4l2CodecH264Dec * self)
|
|
{
|
|
if (self->bitstream)
|
|
goto done;
|
|
|
|
self->bitstream = gst_v4l2_codec_allocator_alloc (self->sink_allocator);
|
|
|
|
if (!self->bitstream) {
|
|
GST_ELEMENT_ERROR (self, RESOURCE, NO_SPACE_LEFT,
|
|
("Not enough memory to decode H264 stream."), (NULL));
|
|
return FALSE;
|
|
}
|
|
|
|
if (!gst_memory_map (self->bitstream, &self->bitstream_map, GST_MAP_WRITE)) {
|
|
GST_ELEMENT_ERROR (self, RESOURCE, WRITE,
|
|
("Could not access bitstream memory for writing"), (NULL));
|
|
g_clear_pointer (&self->bitstream, gst_memory_unref);
|
|
return FALSE;
|
|
}
|
|
|
|
done:
|
|
/* We use this field to track how much we have written */
|
|
self->bitstream_map.size = 0;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_v4l2_codec_h264_dec_start_picture (GstH264Decoder * decoder,
|
|
GstH264Picture * picture, GstH264Slice * slice, GstH264Dpb * dpb)
|
|
{
|
|
GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
|
|
|
|
/* FIXME base class should not call us if negotiation failed */
|
|
if (!self->sink_allocator)
|
|
return GST_FLOW_NOT_NEGOTIATED;
|
|
|
|
if (!gst_v4l2_codec_h264_dec_ensure_bitstream (self))
|
|
return GST_FLOW_ERROR;
|
|
|
|
/*
|
|
* Scaling matrix is present if there's one provided
|
|
* by either the SPS or the PPS. This flag must be
|
|
* set to true or false, before filling the PPS V4L2 control.
|
|
*/
|
|
self->scaling_matrix_present =
|
|
slice->header.pps->sequence->scaling_matrix_present_flag ||
|
|
slice->header.pps->pic_scaling_matrix_present_flag;
|
|
|
|
gst_v4l2_codec_h264_dec_fill_pps (self, slice->header.pps);
|
|
|
|
if (self->scaling_matrix_present)
|
|
gst_v4l2_codec_h264_dec_fill_scaling_matrix (self, slice->header.pps);
|
|
|
|
gst_v4l2_codec_h264_dec_fill_decoder_params (self, &slice->header, picture,
|
|
dpb);
|
|
|
|
self->first_slice = TRUE;
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static gboolean
|
|
gst_v4l2_codec_h264_dec_copy_output_buffer (GstV4l2CodecH264Dec * self,
|
|
GstVideoCodecFrame * codec_frame)
|
|
{
|
|
GstVideoFrame src_frame;
|
|
GstVideoFrame dest_frame;
|
|
GstVideoInfo dest_vinfo;
|
|
GstBuffer *buffer;
|
|
|
|
gst_video_info_set_format (&dest_vinfo, GST_VIDEO_INFO_FORMAT (&self->vinfo),
|
|
self->display_width, self->display_height);
|
|
|
|
buffer = gst_video_decoder_allocate_output_buffer (GST_VIDEO_DECODER (self));
|
|
if (!buffer)
|
|
goto fail;
|
|
|
|
if (!gst_video_frame_map (&src_frame, &self->vinfo,
|
|
codec_frame->output_buffer, GST_MAP_READ))
|
|
goto fail;
|
|
|
|
if (!gst_video_frame_map (&dest_frame, &dest_vinfo, buffer, GST_MAP_WRITE)) {
|
|
gst_video_frame_unmap (&dest_frame);
|
|
goto fail;
|
|
}
|
|
|
|
/* gst_video_frame_copy can crop this, but does not know, so let make it
|
|
* think it's all right */
|
|
GST_VIDEO_INFO_WIDTH (&src_frame.info) = self->display_width;
|
|
GST_VIDEO_INFO_HEIGHT (&src_frame.info) = self->display_height;
|
|
|
|
if (!gst_video_frame_copy (&dest_frame, &src_frame)) {
|
|
gst_video_frame_unmap (&src_frame);
|
|
gst_video_frame_unmap (&dest_frame);
|
|
goto fail;
|
|
}
|
|
|
|
gst_video_frame_unmap (&src_frame);
|
|
gst_video_frame_unmap (&dest_frame);
|
|
gst_buffer_replace (&codec_frame->output_buffer, buffer);
|
|
gst_buffer_unref (buffer);
|
|
|
|
return TRUE;
|
|
|
|
fail:
|
|
GST_ERROR_OBJECT (self, "Failed copy output buffer.");
|
|
return FALSE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_v4l2_codec_h264_dec_output_picture (GstH264Decoder * decoder,
|
|
GstVideoCodecFrame * frame, GstH264Picture * picture)
|
|
{
|
|
GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
|
|
GstVideoDecoder *vdec = GST_VIDEO_DECODER (decoder);
|
|
GstV4l2Request *request = gst_h264_picture_get_user_data (picture);
|
|
gint ret;
|
|
|
|
GST_DEBUG_OBJECT (self, "Output picture %u", picture->system_frame_number);
|
|
|
|
ret = gst_v4l2_request_set_done (request);
|
|
if (ret == 0) {
|
|
GST_ELEMENT_ERROR (self, STREAM, DECODE,
|
|
("Decoding frame %u took too long", picture->system_frame_number),
|
|
(NULL));
|
|
goto error;
|
|
} else if (ret < 0) {
|
|
GST_ELEMENT_ERROR (self, STREAM, DECODE,
|
|
("Decoding request failed: %s", g_strerror (errno)), (NULL));
|
|
goto error;
|
|
}
|
|
g_return_val_if_fail (frame->output_buffer, GST_FLOW_ERROR);
|
|
|
|
if (gst_v4l2_request_failed (request)) {
|
|
GST_ELEMENT_ERROR (self, STREAM, DECODE,
|
|
("Failed to decode frame %u", picture->system_frame_number), (NULL));
|
|
goto error;
|
|
}
|
|
|
|
/* Hold on reference buffers for the rest of the picture lifetime */
|
|
gst_h264_picture_set_user_data (picture,
|
|
gst_buffer_ref (frame->output_buffer), (GDestroyNotify) gst_buffer_unref);
|
|
|
|
if (self->copy_frames)
|
|
gst_v4l2_codec_h264_dec_copy_output_buffer (self, frame);
|
|
|
|
gst_h264_picture_unref (picture);
|
|
|
|
return gst_video_decoder_finish_frame (vdec, frame);
|
|
|
|
error:
|
|
gst_video_decoder_drop_frame (vdec, frame);
|
|
gst_h264_picture_unref (picture);
|
|
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_codec_h264_dec_reset_picture (GstV4l2CodecH264Dec * self)
|
|
{
|
|
if (self->bitstream) {
|
|
if (self->bitstream_map.memory)
|
|
gst_memory_unmap (self->bitstream, &self->bitstream_map);
|
|
g_clear_pointer (&self->bitstream, gst_memory_unref);
|
|
self->bitstream_map = (GstMapInfo) GST_MAP_INFO_INIT;
|
|
}
|
|
|
|
self->num_slices = 0;
|
|
}
|
|
|
|
static gboolean
|
|
gst_v4l2_codec_h264_dec_ensure_output_buffer (GstV4l2CodecH264Dec * self,
|
|
GstVideoCodecFrame * frame)
|
|
{
|
|
GstBuffer *buffer;
|
|
GstFlowReturn flow_ret;
|
|
|
|
if (frame->output_buffer)
|
|
return TRUE;
|
|
|
|
flow_ret = gst_buffer_pool_acquire_buffer (GST_BUFFER_POOL (self->src_pool),
|
|
&buffer, NULL);
|
|
if (flow_ret != GST_FLOW_OK) {
|
|
if (flow_ret == GST_FLOW_FLUSHING)
|
|
GST_DEBUG_OBJECT (self, "Frame decoding aborted, we are flushing.");
|
|
else
|
|
GST_ELEMENT_ERROR (self, RESOURCE, WRITE,
|
|
("No more picture buffer available."), (NULL));
|
|
return FALSE;
|
|
}
|
|
|
|
frame->output_buffer = buffer;
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_v4l2_codec_h264_dec_submit_bitstream (GstV4l2CodecH264Dec * self,
|
|
GstH264Picture * picture, guint flags)
|
|
{
|
|
GstV4l2Request *prev_request, *request = NULL;
|
|
gsize bytesused;
|
|
gboolean ret = FALSE;
|
|
guint count = 0;
|
|
|
|
/* *INDENT-OFF* */
|
|
/* Reserve space for controls */
|
|
struct v4l2_ext_control control[] = {
|
|
{ }, /* SPS */
|
|
{ }, /* PPS */
|
|
{ }, /* DECODE_PARAMS */
|
|
{ }, /* SLICE_PARAMS */
|
|
{ }, /* SCALING_MATRIX */
|
|
{ }, /* PRED_WEIGHTS */
|
|
};
|
|
/* *INDENT-ON* */
|
|
|
|
prev_request = gst_h264_picture_get_user_data (picture);
|
|
|
|
bytesused = self->bitstream_map.size;
|
|
gst_memory_unmap (self->bitstream, &self->bitstream_map);
|
|
self->bitstream_map = (GstMapInfo) GST_MAP_INFO_INIT;
|
|
gst_memory_resize (self->bitstream, 0, bytesused);
|
|
|
|
if (prev_request) {
|
|
request = gst_v4l2_decoder_alloc_sub_request (self->decoder, prev_request,
|
|
self->bitstream);
|
|
} else {
|
|
GstVideoCodecFrame *frame;
|
|
|
|
frame = gst_video_decoder_get_frame (GST_VIDEO_DECODER (self),
|
|
picture->system_frame_number);
|
|
g_return_val_if_fail (frame, FALSE);
|
|
|
|
if (!gst_v4l2_codec_h264_dec_ensure_output_buffer (self, frame))
|
|
goto done;
|
|
|
|
request = gst_v4l2_decoder_alloc_request (self->decoder,
|
|
picture->system_frame_number, self->bitstream, frame->output_buffer);
|
|
|
|
gst_video_codec_frame_unref (frame);
|
|
}
|
|
|
|
if (!request) {
|
|
GST_ELEMENT_ERROR (self, RESOURCE, NO_SPACE_LEFT,
|
|
("Failed to allocate a media request object."), (NULL));
|
|
goto done;
|
|
}
|
|
|
|
if (self->need_sequence) {
|
|
control[count].id = V4L2_CID_STATELESS_H264_SPS;
|
|
control[count].ptr = &self->sps;
|
|
control[count].size = sizeof (self->sps);
|
|
count++;
|
|
self->need_sequence = FALSE;
|
|
}
|
|
|
|
if (self->first_slice) {
|
|
control[count].id = V4L2_CID_STATELESS_H264_PPS;
|
|
control[count].ptr = &self->pps;
|
|
control[count].size = sizeof (self->pps);
|
|
count++;
|
|
|
|
if (self->scaling_matrix_present) {
|
|
control[count].id = V4L2_CID_STATELESS_H264_SCALING_MATRIX;
|
|
control[count].ptr = &self->scaling_matrix;
|
|
control[count].size = sizeof (self->scaling_matrix);
|
|
count++;
|
|
}
|
|
|
|
control[count].id = V4L2_CID_STATELESS_H264_DECODE_PARAMS;
|
|
control[count].ptr = &self->decode_params;
|
|
control[count].size = sizeof (self->decode_params);
|
|
count++;
|
|
|
|
self->first_slice = FALSE;
|
|
}
|
|
|
|
/* If it's not slice-based then it doesn't support per-slice controls. */
|
|
if (is_slice_based (self)) {
|
|
control[count].id = V4L2_CID_STATELESS_H264_SLICE_PARAMS;
|
|
control[count].ptr = self->slice_params->data;
|
|
control[count].size = g_array_get_element_size (self->slice_params)
|
|
* self->num_slices;
|
|
count++;
|
|
|
|
control[count].id = V4L2_CID_STATELESS_H264_PRED_WEIGHTS;
|
|
control[count].ptr = &self->pred_weight;
|
|
control[count].size = sizeof (self->pred_weight);
|
|
count++;
|
|
}
|
|
|
|
if (!gst_v4l2_decoder_set_controls (self->decoder, request, control, count)) {
|
|
GST_ELEMENT_ERROR (self, RESOURCE, WRITE,
|
|
("Driver did not accept the bitstream parameters."), (NULL));
|
|
goto done;
|
|
}
|
|
|
|
if (!gst_v4l2_request_queue (request, flags)) {
|
|
GST_ELEMENT_ERROR (self, RESOURCE, WRITE,
|
|
("Driver did not accept the decode request."), (NULL));
|
|
goto done;
|
|
}
|
|
|
|
gst_h264_picture_set_user_data (picture, g_steal_pointer (&request),
|
|
(GDestroyNotify) gst_v4l2_request_unref);
|
|
ret = TRUE;
|
|
|
|
done:
|
|
if (request)
|
|
gst_v4l2_request_unref (request);
|
|
|
|
gst_v4l2_codec_h264_dec_reset_picture (self);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_v4l2_codec_h264_dec_decode_slice (GstH264Decoder * decoder,
|
|
GstH264Picture * picture, GstH264Slice * slice, GArray * ref_pic_list0,
|
|
GArray * ref_pic_list1)
|
|
{
|
|
GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
|
|
gsize sc_off = 0;
|
|
gsize nal_size;
|
|
guint8 *bitstream_data;
|
|
|
|
if (is_slice_based (self)) {
|
|
if (self->bitstream_map.size) {
|
|
/* In slice mode, we submit the pending slice asking the accelerator to
|
|
* hold on the picture */
|
|
if (!gst_v4l2_codec_h264_dec_submit_bitstream (self, picture,
|
|
V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF)
|
|
|| !gst_v4l2_codec_h264_dec_ensure_bitstream (self))
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
gst_v4l2_codec_h264_dec_fill_slice_params (self, slice);
|
|
gst_v4l2_codec_h264_dec_fill_pred_weight (self, &slice->header);
|
|
gst_v4l2_codec_h264_dec_fill_references (self,
|
|
GST_H264_PICTURE_IS_FRAME (picture), ref_pic_list0, ref_pic_list1);
|
|
}
|
|
|
|
bitstream_data = self->bitstream_map.data + self->bitstream_map.size;
|
|
|
|
if (needs_start_codes (self))
|
|
sc_off = 3;
|
|
nal_size = sc_off + slice->nalu.size;
|
|
|
|
if (self->bitstream_map.size + nal_size > self->bitstream_map.maxsize) {
|
|
GST_ELEMENT_ERROR (decoder, RESOURCE, NO_SPACE_LEFT,
|
|
("Not enough space to send all slice of an H264 frame."), (NULL));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
if (needs_start_codes (self)) {
|
|
bitstream_data[0] = 0x00;
|
|
bitstream_data[1] = 0x00;
|
|
bitstream_data[2] = 0x01;
|
|
}
|
|
|
|
memcpy (bitstream_data + sc_off, slice->nalu.data + slice->nalu.offset,
|
|
slice->nalu.size);
|
|
self->bitstream_map.size += nal_size;
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_v4l2_codec_h264_dec_end_picture (GstH264Decoder * decoder,
|
|
GstH264Picture * picture)
|
|
{
|
|
GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
|
|
guint flags = 0;
|
|
|
|
/* Hold on the output frame if this is first field of a pair */
|
|
if (picture->field != GST_H264_PICTURE_FIELD_FRAME && !picture->second_field)
|
|
flags = V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF;
|
|
|
|
if (!gst_v4l2_codec_h264_dec_submit_bitstream (self, picture, flags))
|
|
return GST_FLOW_ERROR;
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_v4l2_codec_h264_dec_new_field_picture (GstH264Decoder * decoder,
|
|
const GstH264Picture * first_field, GstH264Picture * second_field)
|
|
{
|
|
GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
|
|
GstV4l2Request *request =
|
|
gst_h264_picture_get_user_data ((GstH264Picture *) first_field);
|
|
|
|
if (!request) {
|
|
GST_WARNING_OBJECT (self,
|
|
"First picture does not have an associated request");
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (self, "Assigned request %p to second field.", request);
|
|
|
|
/* Associate the previous request with the new picture so that
|
|
* submit_bitstream can create sub-request */
|
|
gst_h264_picture_set_user_data (second_field, gst_v4l2_request_ref (request),
|
|
(GDestroyNotify) gst_v4l2_request_unref);
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
static guint
|
|
gst_v4l2_codec_h264_dec_get_preferred_output_delay (GstH264Decoder * decoder,
|
|
gboolean live)
|
|
{
|
|
GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
|
|
guint delay;
|
|
|
|
if (live)
|
|
delay = 0;
|
|
else
|
|
/* Just one for now, perhaps we can make this configurable in the future. */
|
|
delay = 1;
|
|
|
|
gst_v4l2_decoder_set_render_delay (self->decoder, delay);
|
|
|
|
return delay;
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_codec_h264_dec_set_flushing (GstV4l2CodecH264Dec * self,
|
|
gboolean flushing)
|
|
{
|
|
if (self->sink_allocator)
|
|
gst_v4l2_codec_allocator_set_flushing (self->sink_allocator, flushing);
|
|
if (self->src_allocator)
|
|
gst_v4l2_codec_allocator_set_flushing (self->src_allocator, flushing);
|
|
}
|
|
|
|
static gboolean
|
|
gst_v4l2_codec_h264_dec_flush (GstVideoDecoder * decoder)
|
|
{
|
|
GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
|
|
|
|
GST_DEBUG_OBJECT (self, "Flushing decoder state.");
|
|
|
|
gst_v4l2_decoder_flush (self->decoder);
|
|
gst_v4l2_codec_h264_dec_set_flushing (self, FALSE);
|
|
|
|
return GST_VIDEO_DECODER_CLASS (parent_class)->flush (decoder);
|
|
}
|
|
|
|
static gboolean
|
|
gst_v4l2_codec_h264_dec_sink_event (GstVideoDecoder * decoder, GstEvent * event)
|
|
{
|
|
GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_FLUSH_START:
|
|
GST_DEBUG_OBJECT (self, "flush start");
|
|
gst_v4l2_codec_h264_dec_set_flushing (self, TRUE);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return GST_VIDEO_DECODER_CLASS (parent_class)->sink_event (decoder, event);
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_v4l2_codec_h264_dec_change_state (GstElement * element,
|
|
GstStateChange transition)
|
|
{
|
|
GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (element);
|
|
|
|
if (transition == GST_STATE_CHANGE_PAUSED_TO_READY)
|
|
gst_v4l2_codec_h264_dec_set_flushing (self, TRUE);
|
|
|
|
return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_codec_h264_dec_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (object);
|
|
GObject *dec = G_OBJECT (self->decoder);
|
|
|
|
switch (prop_id) {
|
|
default:
|
|
gst_v4l2_decoder_set_property (dec, prop_id - PROP_LAST, value, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_codec_h264_dec_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (object);
|
|
GObject *dec = G_OBJECT (self->decoder);
|
|
|
|
switch (prop_id) {
|
|
default:
|
|
gst_v4l2_decoder_get_property (dec, prop_id - PROP_LAST, value, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_codec_h264_dec_init (GstV4l2CodecH264Dec * self)
|
|
{
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_codec_h264_dec_subinit (GstV4l2CodecH264Dec * self,
|
|
GstV4l2CodecH264DecClass * klass)
|
|
{
|
|
self->decoder = gst_v4l2_decoder_new (klass->device);
|
|
gst_video_info_init (&self->vinfo);
|
|
self->slice_params = g_array_sized_new (FALSE, TRUE,
|
|
sizeof (struct v4l2_ctrl_h264_slice_params), 4);
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_codec_h264_dec_dispose (GObject * object)
|
|
{
|
|
GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (object);
|
|
|
|
g_clear_object (&self->decoder);
|
|
g_clear_pointer (&self->slice_params, g_array_unref);
|
|
|
|
G_OBJECT_CLASS (parent_class)->dispose (object);
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_codec_h264_dec_class_init (GstV4l2CodecH264DecClass * klass)
|
|
{
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_codec_h264_dec_subclass_init (GstV4l2CodecH264DecClass * klass,
|
|
GstV4l2CodecDevice * device)
|
|
{
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
|
|
GstVideoDecoderClass *decoder_class = GST_VIDEO_DECODER_CLASS (klass);
|
|
GstH264DecoderClass *h264decoder_class = GST_H264_DECODER_CLASS (klass);
|
|
|
|
gobject_class->set_property = gst_v4l2_codec_h264_dec_set_property;
|
|
gobject_class->get_property = gst_v4l2_codec_h264_dec_get_property;
|
|
gobject_class->dispose = gst_v4l2_codec_h264_dec_dispose;
|
|
|
|
gst_element_class_set_static_metadata (element_class,
|
|
"V4L2 Stateless H.264 Video Decoder",
|
|
"Codec/Decoder/Video/Hardware",
|
|
"A V4L2 based H.264 video decoder",
|
|
"Nicolas Dufresne <nicolas.dufresne@collabora.com>");
|
|
|
|
gst_element_class_add_static_pad_template (element_class, &sink_template);
|
|
gst_element_class_add_static_pad_template (element_class, &src_template);
|
|
element_class->change_state =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_change_state);
|
|
|
|
decoder_class->open = GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_open);
|
|
decoder_class->close = GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_close);
|
|
decoder_class->stop = GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_stop);
|
|
decoder_class->negotiate =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_negotiate);
|
|
decoder_class->decide_allocation =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_decide_allocation);
|
|
decoder_class->flush = GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_flush);
|
|
decoder_class->sink_event =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_sink_event);
|
|
|
|
h264decoder_class->new_sequence =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_new_sequence);
|
|
h264decoder_class->output_picture =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_output_picture);
|
|
h264decoder_class->start_picture =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_start_picture);
|
|
h264decoder_class->decode_slice =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_decode_slice);
|
|
h264decoder_class->end_picture =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_end_picture);
|
|
h264decoder_class->new_field_picture =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_new_field_picture);
|
|
h264decoder_class->get_preferred_output_delay =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_get_preferred_output_delay);
|
|
|
|
klass->device = device;
|
|
gst_v4l2_decoder_install_properties (gobject_class, PROP_LAST, device);
|
|
}
|
|
|
|
void
|
|
gst_v4l2_codec_h264_dec_register (GstPlugin * plugin, GstV4l2Decoder * decoder,
|
|
GstV4l2CodecDevice * device, guint rank)
|
|
{
|
|
GstCaps *src_caps;
|
|
|
|
if (!gst_v4l2_decoder_set_sink_fmt (decoder, V4L2_PIX_FMT_H264_SLICE,
|
|
320, 240, 8))
|
|
return;
|
|
src_caps = gst_v4l2_decoder_enum_src_formats (decoder);
|
|
|
|
if (gst_caps_is_empty (src_caps)) {
|
|
GST_WARNING ("Not registering H264 decoder since it produces no "
|
|
"supported format");
|
|
goto done;
|
|
}
|
|
|
|
gst_v4l2_decoder_register (plugin,
|
|
GST_TYPE_V4L2_CODEC_H264_DEC,
|
|
(GClassInitFunc) gst_v4l2_codec_h264_dec_subclass_init,
|
|
gst_mini_object_ref (GST_MINI_OBJECT (device)),
|
|
(GInstanceInitFunc) gst_v4l2_codec_h264_dec_subinit,
|
|
"v4l2sl%sh264dec", device, rank, NULL);
|
|
|
|
done:
|
|
gst_caps_unref (src_caps);
|
|
}
|