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gstreamer/subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codech265dec.c
Robert Mader 5189e8b956 v4l2codecs: decoders: Add DMA_DRM caps support 
In order to simplify caps negotiations for clients and, notably, be more
compatible with va* decoders.
Crucially this allows clients to know ahead of time whether buffers will
actually be DMABufs.

Similar to GstVaBaseDec we only announce system memory caps if the peer
has ANY caps. Further more, and again like va decoders, we fail in
`decide_allocation()` if DMA_DRM caps are used without VideoMeta.
Apart from buggy peers this can happen e.g. when a peer with ANY caps
is used in combination with caps filters.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5890>
2024-03-14 17:32:13 +00:00

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/* GStreamer
* Copyright (C) 2020 Nicolas Dufresne <nicolas.dufresne@collabora.com>
* Copyright (C) 2020 Safran Passenger Innovations LLC
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "gstv4l2codecallocator.h"
#include "gstv4l2codech265dec.h"
#include "gstv4l2codecpool.h"
#include "gstv4l2format.h"
#include "linux/v4l2-controls.h"
#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
#define V4L2_MIN_KERNEL_VER_MAJOR 5
#define V4L2_MIN_KERNEL_VER_MINOR 20
#define V4L2_MIN_KERNEL_VERSION KERNEL_VERSION(V4L2_MIN_KERNEL_VER_MAJOR, V4L2_MIN_KERNEL_VER_MINOR, 0)
GST_DEBUG_CATEGORY_STATIC (v4l2_h265dec_debug);
#define GST_CAT_DEFAULT v4l2_h265dec_debug
enum
{
PROP_0,
PROP_LAST = PROP_0
};
static GstStaticPadTemplate sink_template =
GST_STATIC_PAD_TEMPLATE (GST_VIDEO_DECODER_SINK_NAME,
GST_PAD_SINK, GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-h265, "
"stream-format=(string) { hvc1, hev1, byte-stream }, "
"alignment=(string) au")
);
#define SRC_CAPS \
GST_VIDEO_DMA_DRM_CAPS_MAKE " ; " \
GST_VIDEO_CAPS_MAKE (GST_V4L2_DEFAULT_VIDEO_FORMATS)
#define SRC_CAPS_NO_DRM \
GST_VIDEO_CAPS_MAKE (GST_V4L2_DEFAULT_VIDEO_FORMATS)
static GstStaticCaps static_src_caps = GST_STATIC_CAPS (SRC_CAPS);
static GstStaticCaps static_src_caps_no_drm = GST_STATIC_CAPS (SRC_CAPS_NO_DRM);
static GstStaticPadTemplate src_template =
GST_STATIC_PAD_TEMPLATE (GST_VIDEO_DECODER_SRC_NAME,
GST_PAD_SRC, GST_PAD_ALWAYS,
GST_STATIC_CAPS (SRC_CAPS));
struct _GstV4l2CodecH265Dec
{
GstH265Decoder parent;
GstV4l2Decoder *decoder;
GstVideoCodecState *output_state;
GstVideoInfo vinfo;
GstVideoInfoDmaDrm vinfo_drm;
gint display_width;
gint display_height;
gint coded_width;
gint coded_height;
guint bitdepth;
guint chroma_format_idc;
guint num_slices;
gboolean first_slice;
GstV4l2CodecAllocator *sink_allocator;
GstV4l2CodecAllocator *src_allocator;
GstV4l2CodecPool *src_pool;
gint min_pool_size;
gboolean has_videometa;
gboolean streaming;
gboolean copy_frames;
gboolean need_sequence;
struct v4l2_ctrl_hevc_sps sps;
struct v4l2_ctrl_hevc_pps pps;
struct v4l2_ctrl_hevc_scaling_matrix scaling_matrix;
struct v4l2_ctrl_hevc_decode_params decode_params;
GArray *slice_params;
GArray *entry_point_offsets;
enum v4l2_stateless_hevc_decode_mode decode_mode;
enum v4l2_stateless_hevc_start_code start_code;
GstMemory *bitstream;
GstMapInfo bitstream_map;
gboolean support_scaling_matrix;
gboolean support_slice_parameters;
gboolean support_entry_point_offsets;
GstVideoConverter *convert;
gboolean need_crop;
gint crop_rect_width, crop_rect_height;
gint crop_rect_x, crop_rect_y;
};
G_DEFINE_ABSTRACT_TYPE (GstV4l2CodecH265Dec, gst_v4l2_codec_h265_dec,
GST_TYPE_H265_DECODER);
#define parent_class gst_v4l2_codec_h265_dec_parent_class
static gboolean
is_frame_based (GstV4l2CodecH265Dec * self)
{
return (self->decode_mode ==
V4L2_STATELESS_HEVC_DECODE_MODE_FRAME_BASED) &&
!self->support_slice_parameters;
}
static gboolean
is_slice_based (GstV4l2CodecH265Dec * self)
{
return self->decode_mode == V4L2_STATELESS_HEVC_DECODE_MODE_SLICE_BASED;
}
static gboolean
is_frame_based_with_slices (GstV4l2CodecH265Dec * self)
{
return (self->decode_mode ==
V4L2_STATELESS_HEVC_DECODE_MODE_FRAME_BASED) &&
self->support_slice_parameters;
}
static gboolean
needs_start_codes (GstV4l2CodecH265Dec * self)
{
return self->start_code == V4L2_STATELESS_HEVC_START_CODE_ANNEX_B;
}
static gboolean
gst_v4l2_decoder_h265_api_check (GstV4l2Decoder * decoder)
{
guint i, ret_size;
/* *INDENT-OFF* */
#define SET_ID(cid) .id = (cid), .name = #cid
struct
{
const gchar *name;
unsigned int id;
unsigned int size;
gboolean optional;
} controls[] = {
{
SET_ID (V4L2_CID_STATELESS_HEVC_SPS),
.size = sizeof(struct v4l2_ctrl_hevc_sps),
}, {
SET_ID (V4L2_CID_STATELESS_HEVC_PPS),
.size = sizeof(struct v4l2_ctrl_hevc_pps),
}, {
SET_ID (V4L2_CID_STATELESS_HEVC_SCALING_MATRIX),
.size = sizeof(struct v4l2_ctrl_hevc_scaling_matrix),
.optional = TRUE,
}, {
SET_ID (V4L2_CID_STATELESS_HEVC_DECODE_PARAMS),
.size = sizeof(struct v4l2_ctrl_hevc_decode_params),
}, {
SET_ID (V4L2_CID_STATELESS_HEVC_SLICE_PARAMS),
.size = sizeof(struct v4l2_ctrl_hevc_slice_params),
.optional = TRUE,
}
};
#undef SET_ID
/* *INDENT-ON* */
/*
* Compatibility check: make sure the pointer controls are
* the right size.
*/
for (i = 0; i < G_N_ELEMENTS (controls); i++) {
gboolean control_found;
control_found = gst_v4l2_decoder_query_control_size (decoder,
controls[i].id, &ret_size);
if (!controls[i].optional && !control_found) {
GST_WARNING ("Driver is missing %s support.", controls[i].name);
return FALSE;
}
if (control_found && ret_size != controls[i].size) {
GST_WARNING ("%s control size mismatch: got %d bytes but %d expected.",
controls[i].name, ret_size, controls[i].size);
return FALSE;
}
}
return TRUE;
}
static gboolean
gst_v4l2_codec_h265_dec_open (GstVideoDecoder * decoder)
{
GstV4l2CodecH265Dec *self = GST_V4L2_CODEC_H265_DEC (decoder);
/* *INDENT-OFF* */
struct v4l2_ext_control control[] = {
{
.id = V4L2_CID_STATELESS_HEVC_DECODE_MODE,
},
{
.id = V4L2_CID_STATELESS_HEVC_START_CODE,
},
};
struct v4l2_ext_control scaling_matrix[] = {
{
.id = V4L2_CID_STATELESS_HEVC_SCALING_MATRIX,
.ptr = &self->scaling_matrix,
.size = sizeof (self->scaling_matrix),
},
};
/* *INDENT-ON* */
if (!gst_v4l2_decoder_open (self->decoder)) {
GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ_WRITE,
("Failed to open H265 decoder"),
("gst_v4l2_decoder_open() failed: %s", g_strerror (errno)));
return FALSE;
}
if (!gst_v4l2_decoder_get_controls (self->decoder, control,
G_N_ELEMENTS (control))) {
GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ_WRITE,
("Driver did not report framing and start code method."),
("gst_v4l2_decoder_get_controls() failed: %s", g_strerror (errno)));
return FALSE;
}
self->support_scaling_matrix =
gst_v4l2_decoder_get_controls (self->decoder, scaling_matrix,
G_N_ELEMENTS (scaling_matrix));
self->support_slice_parameters =
gst_v4l2_decoder_query_control_size (self->decoder,
V4L2_CID_STATELESS_HEVC_SLICE_PARAMS, NULL);
self->support_entry_point_offsets =
gst_v4l2_decoder_query_control_size (self->decoder,
V4L2_CID_STATELESS_HEVC_ENTRY_POINT_OFFSETS, NULL);
self->decode_mode = control[0].value;
self->start_code = control[1].value;
GST_INFO_OBJECT (self, "Opened H265 %s decoder %s",
is_frame_based (self) ? "frame based" : is_slice_based (self) ?
"slice based" : "frame based with slices",
needs_start_codes (self) ? "using start-codes" : "without start-codes");
gst_h265_decoder_set_process_ref_pic_lists (GST_H265_DECODER (self),
is_slice_based (self) || is_frame_based_with_slices (self));
return TRUE;
}
static gboolean
gst_v4l2_codec_h265_dec_close (GstVideoDecoder * decoder)
{
GstV4l2CodecH265Dec *self = GST_V4L2_CODEC_H265_DEC (decoder);
gst_v4l2_decoder_close (self->decoder);
return TRUE;
}
static void
gst_v4l2_codec_h265_dec_streamoff (GstV4l2CodecH265Dec * self)
{
if (self->streaming) {
gst_v4l2_decoder_streamoff (self->decoder, GST_PAD_SINK);
gst_v4l2_decoder_streamoff (self->decoder, GST_PAD_SRC);
self->streaming = FALSE;
}
}
static void
gst_v4l2_codec_h265_dec_reset_allocation (GstV4l2CodecH265Dec * self)
{
if (self->sink_allocator) {
gst_v4l2_codec_allocator_detach (self->sink_allocator);
g_clear_object (&self->sink_allocator);
}
if (self->src_allocator) {
gst_v4l2_codec_allocator_detach (self->src_allocator);
g_clear_object (&self->src_allocator);
g_clear_object (&self->src_pool);
}
}
static gboolean
gst_v4l2_codec_h265_dec_stop (GstVideoDecoder * decoder)
{
GstV4l2CodecH265Dec *self = GST_V4L2_CODEC_H265_DEC (decoder);
gst_v4l2_codec_h265_dec_streamoff (self);
gst_v4l2_codec_h265_dec_reset_allocation (self);
if (self->output_state)
gst_video_codec_state_unref (self->output_state);
self->output_state = NULL;
return GST_VIDEO_DECODER_CLASS (parent_class)->stop (decoder);
}
static gint
get_pixel_bitdepth (GstV4l2CodecH265Dec * self)
{
gint depth;
switch (self->chroma_format_idc) {
case 0:
/* 4:0:0 */
depth = self->bitdepth;
break;
case 1:
/* 4:2:0 */
depth = self->bitdepth + self->bitdepth / 2;
break;
case 2:
/* 4:2:2 */
depth = 2 * self->bitdepth;
break;
case 3:
/* 4:4:4 */
depth = 3 * self->bitdepth;
break;
default:
GST_WARNING_OBJECT (self, "Unsupported chroma format %i",
self->chroma_format_idc);
depth = 0;
break;
}
return depth;
}
static gboolean
gst_v4l2_codec_h265_dec_negotiate (GstVideoDecoder * decoder)
{
GstV4l2CodecH265Dec *self = GST_V4L2_CODEC_H265_DEC (decoder);
GstH265Decoder *h265dec = GST_H265_DECODER (decoder);
/* *INDENT-OFF* */
struct v4l2_ext_control control[] = {
{
.id = V4L2_CID_STATELESS_HEVC_SPS,
.ptr = &self->sps,
.size = sizeof (self->sps),
},
};
/* *INDENT-ON* */
GstCaps *peer_caps, *filter, *caps;
GstStaticCaps *static_filter;
/* Ignore downstream renegotiation request. */
if (self->streaming)
goto done;
GST_DEBUG_OBJECT (self, "Negotiate");
gst_v4l2_codec_h265_dec_reset_allocation (self);
if (!gst_v4l2_decoder_set_sink_fmt (self->decoder, V4L2_PIX_FMT_HEVC_SLICE,
self->coded_width, self->coded_height, get_pixel_bitdepth (self))) {
GST_ELEMENT_ERROR (self, CORE, NEGOTIATION,
("Failed to configure H265 decoder"),
("gst_v4l2_decoder_set_sink_fmt() failed: %s", g_strerror (errno)));
gst_v4l2_decoder_close (self->decoder);
return FALSE;
}
if (!gst_v4l2_decoder_set_controls (self->decoder, NULL, control,
G_N_ELEMENTS (control))) {
GST_ELEMENT_ERROR (decoder, RESOURCE, WRITE,
("Driver does not support the selected stream."), (NULL));
return FALSE;
}
/* If the peer has ANY caps only advertise system memory caps */
peer_caps = gst_pad_peer_query_caps (decoder->srcpad, NULL);
static_filter =
gst_caps_is_any (peer_caps) ? &static_src_caps_no_drm : &static_src_caps;
gst_caps_unref (peer_caps);
filter = gst_v4l2_decoder_enum_src_formats (self->decoder, static_filter);
if (!filter) {
GST_ELEMENT_ERROR (self, CORE, NEGOTIATION,
("No supported decoder output formats"), (NULL));
return FALSE;
}
GST_DEBUG_OBJECT (self, "Supported output formats: %" GST_PTR_FORMAT, filter);
caps = gst_pad_peer_query_caps (decoder->srcpad, filter);
gst_caps_unref (filter);
GST_DEBUG_OBJECT (self, "Peer supported formats: %" GST_PTR_FORMAT, caps);
if (!gst_v4l2_decoder_select_src_format (self->decoder, caps, &self->vinfo,
&self->vinfo_drm)) {
GST_ELEMENT_ERROR (self, CORE, NEGOTIATION,
("Unsupported bitdepth/chroma format"),
("No support for %ux%u %ubit chroma IDC %i", self->coded_width,
self->coded_height, self->bitdepth, self->chroma_format_idc));
gst_caps_unref (caps);
return FALSE;
}
gst_caps_unref (caps);
done:
if (self->output_state)
gst_video_codec_state_unref (self->output_state);
self->output_state =
gst_v4l2_decoder_set_output_state (GST_VIDEO_DECODER (self), &self->vinfo,
&self->vinfo_drm, self->display_width, self->display_height,
h265dec->input_state);
if (GST_VIDEO_DECODER_CLASS (parent_class)->negotiate (decoder)) {
if (self->streaming)
return TRUE;
if (!gst_v4l2_decoder_streamon (self->decoder, GST_PAD_SINK)) {
GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
("Could not enable the decoder driver."),
("VIDIOC_STREAMON(SINK) failed: %s", g_strerror (errno)));
return FALSE;
}
if (!gst_v4l2_decoder_streamon (self->decoder, GST_PAD_SRC)) {
GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
("Could not enable the decoder driver."),
("VIDIOC_STREAMON(SRC) failed: %s", g_strerror (errno)));
return FALSE;
}
self->streaming = TRUE;
return TRUE;
}
return FALSE;
}
static gboolean
gst_v4l2_codec_h265_dec_decide_allocation (GstVideoDecoder * decoder,
GstQuery * query)
{
GstV4l2CodecH265Dec *self = GST_V4L2_CODEC_H265_DEC (decoder);
GstCaps *caps = NULL;
guint min = 0;
if (self->streaming)
goto no_internal_changes;
g_clear_object (&self->src_pool);
g_clear_object (&self->src_allocator);
self->has_videometa = gst_query_find_allocation_meta (query,
GST_VIDEO_META_API_TYPE, NULL);
gst_query_parse_allocation (query, &caps, NULL);
if (!caps) {
GST_ERROR_OBJECT (self, "No valid caps");
return FALSE;
}
if (gst_video_is_dma_drm_caps (caps) && !self->has_videometa) {
GST_ERROR_OBJECT (self,
"DMABuf caps negotiated without the mandatory support of VideoMeta");
return FALSE;
}
gst_caps_unref (caps);
if (gst_query_get_n_allocation_pools (query) > 0)
gst_query_parse_nth_allocation_pool (query, 0, NULL, NULL, &min, NULL);
min = MAX (2, min);
self->sink_allocator = gst_v4l2_codec_allocator_new (self->decoder,
GST_PAD_SINK, self->min_pool_size + 2);
self->src_allocator = gst_v4l2_codec_allocator_new (self->decoder,
GST_PAD_SRC, self->min_pool_size + min + 1);
self->src_pool = gst_v4l2_codec_pool_new (self->src_allocator, &self->vinfo);
no_internal_changes:
/* Our buffer pool is internal, we will let the base class create a video
* pool, and use it if we are running out of buffers or if downstream does
* not support GstVideoMeta */
return GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation
(decoder, query);
}
static void
gst_v4l2_codec_h265_dec_fill_sequence (GstV4l2CodecH265Dec * self,
const GstH265SPS * sps)
{
/* Whenever we update teh sps, we need to send it again */
self->need_sequence = TRUE;
/* *INDENT-OFF* */
self->sps = (struct v4l2_ctrl_hevc_sps) {
.video_parameter_set_id = sps->vps->id,
.seq_parameter_set_id = sps->id,
.pic_width_in_luma_samples = sps->pic_width_in_luma_samples,
.pic_height_in_luma_samples = sps->pic_height_in_luma_samples,
.bit_depth_luma_minus8 = sps->bit_depth_luma_minus8,
.bit_depth_chroma_minus8 = sps->bit_depth_chroma_minus8,
.log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_pic_order_cnt_lsb_minus4,
.sps_max_dec_pic_buffering_minus1 = sps->max_dec_pic_buffering_minus1[0],
.sps_max_num_reorder_pics = sps->max_num_reorder_pics[0],
.sps_max_latency_increase_plus1 = sps->max_latency_increase_plus1[0],
.log2_min_luma_coding_block_size_minus3 = sps->log2_min_luma_coding_block_size_minus3,
.log2_diff_max_min_luma_coding_block_size = sps->log2_diff_max_min_luma_coding_block_size,
.log2_min_luma_transform_block_size_minus2 = sps->log2_min_transform_block_size_minus2,
.log2_diff_max_min_luma_transform_block_size = sps->log2_diff_max_min_transform_block_size,
.max_transform_hierarchy_depth_inter = sps->max_transform_hierarchy_depth_inter,
.max_transform_hierarchy_depth_intra = sps->max_transform_hierarchy_depth_intra,
.num_short_term_ref_pic_sets = sps->num_short_term_ref_pic_sets,
.num_long_term_ref_pics_sps = sps->num_long_term_ref_pics_sps,
.chroma_format_idc = sps->chroma_format_idc,
.sps_max_sub_layers_minus1 = sps->max_sub_layers_minus1,
.flags = (sps->separate_colour_plane_flag ? V4L2_HEVC_SPS_FLAG_SEPARATE_COLOUR_PLANE : 0) |
(sps->scaling_list_enabled_flag ? V4L2_HEVC_SPS_FLAG_SCALING_LIST_ENABLED : 0) |
(sps->amp_enabled_flag ? V4L2_HEVC_SPS_FLAG_AMP_ENABLED : 0) |
(sps->sample_adaptive_offset_enabled_flag ? V4L2_HEVC_SPS_FLAG_SAMPLE_ADAPTIVE_OFFSET : 0) |
(sps->long_term_ref_pics_present_flag ? V4L2_HEVC_SPS_FLAG_LONG_TERM_REF_PICS_PRESENT : 0) |
(sps->temporal_mvp_enabled_flag ? V4L2_HEVC_SPS_FLAG_SPS_TEMPORAL_MVP_ENABLED : 0) |
(sps->strong_intra_smoothing_enabled_flag ? V4L2_HEVC_SPS_FLAG_STRONG_INTRA_SMOOTHING_ENABLED : 0),
};
/* *INDENT-ON* */
if (sps->pcm_enabled_flag) {
self->sps.pcm_sample_bit_depth_luma_minus1 =
sps->pcm_sample_bit_depth_luma_minus1;
self->sps.pcm_sample_bit_depth_chroma_minus1 =
sps->pcm_sample_bit_depth_chroma_minus1;
self->sps.log2_min_pcm_luma_coding_block_size_minus3 =
sps->log2_min_pcm_luma_coding_block_size_minus3;
self->sps.log2_diff_max_min_pcm_luma_coding_block_size =
sps->log2_diff_max_min_pcm_luma_coding_block_size;
self->sps.flags |=
V4L2_HEVC_SPS_FLAG_PCM_ENABLED | (sps->pcm_loop_filter_disabled_flag ?
V4L2_HEVC_SPS_FLAG_PCM_LOOP_FILTER_DISABLED : 0);
}
}
static void
gst_v4l2_codec_h265_dec_fill_pps (GstV4l2CodecH265Dec * self, GstH265PPS * pps)
{
gint i;
/* *INDENT-OFF* */
self->pps = (struct v4l2_ctrl_hevc_pps) {
.pic_parameter_set_id = pps->id,
.num_extra_slice_header_bits = pps->num_extra_slice_header_bits,
.num_ref_idx_l0_default_active_minus1 = pps->num_ref_idx_l0_default_active_minus1,
.num_ref_idx_l1_default_active_minus1 = pps->num_ref_idx_l1_default_active_minus1,
.init_qp_minus26 = pps->init_qp_minus26,
.diff_cu_qp_delta_depth = pps->diff_cu_qp_delta_depth,
.pps_cb_qp_offset = pps->cb_qp_offset,
.pps_cr_qp_offset = pps->cr_qp_offset,
.pps_beta_offset_div2 = pps->beta_offset_div2,
.pps_tc_offset_div2 = pps->tc_offset_div2,
.log2_parallel_merge_level_minus2 = pps->log2_parallel_merge_level_minus2,
.flags = (pps->dependent_slice_segments_enabled_flag ? V4L2_HEVC_PPS_FLAG_DEPENDENT_SLICE_SEGMENT_ENABLED : 0) |
(pps->output_flag_present_flag ? V4L2_HEVC_PPS_FLAG_OUTPUT_FLAG_PRESENT : 0) |
(pps->sign_data_hiding_enabled_flag ? V4L2_HEVC_PPS_FLAG_SIGN_DATA_HIDING_ENABLED : 0) |
(pps->cabac_init_present_flag ? V4L2_HEVC_PPS_FLAG_CABAC_INIT_PRESENT : 0) |
(pps->constrained_intra_pred_flag ? V4L2_HEVC_PPS_FLAG_CONSTRAINED_INTRA_PRED : 0) |
(pps->transform_skip_enabled_flag ? V4L2_HEVC_PPS_FLAG_TRANSFORM_SKIP_ENABLED : 0) |
(pps->cu_qp_delta_enabled_flag ? V4L2_HEVC_PPS_FLAG_CU_QP_DELTA_ENABLED : 0) |
(pps->slice_chroma_qp_offsets_present_flag ? V4L2_HEVC_PPS_FLAG_PPS_SLICE_CHROMA_QP_OFFSETS_PRESENT : 0) |
(pps->weighted_pred_flag ? V4L2_HEVC_PPS_FLAG_WEIGHTED_PRED : 0) |
(pps->weighted_bipred_flag ? V4L2_HEVC_PPS_FLAG_WEIGHTED_BIPRED : 0) |
(pps->transquant_bypass_enabled_flag ? V4L2_HEVC_PPS_FLAG_TRANSQUANT_BYPASS_ENABLED : 0) |
(pps->tiles_enabled_flag ? V4L2_HEVC_PPS_FLAG_TILES_ENABLED : 0) |
(pps->entropy_coding_sync_enabled_flag ? V4L2_HEVC_PPS_FLAG_ENTROPY_CODING_SYNC_ENABLED : 0) |
(pps->loop_filter_across_tiles_enabled_flag ? V4L2_HEVC_PPS_FLAG_LOOP_FILTER_ACROSS_TILES_ENABLED : 0) |
(pps->loop_filter_across_slices_enabled_flag ? V4L2_HEVC_PPS_FLAG_PPS_LOOP_FILTER_ACROSS_SLICES_ENABLED : 0 ) |
(pps->deblocking_filter_override_enabled_flag ? V4L2_HEVC_PPS_FLAG_DEBLOCKING_FILTER_OVERRIDE_ENABLED : 0) |
(pps->deblocking_filter_disabled_flag ? V4L2_HEVC_PPS_FLAG_PPS_DISABLE_DEBLOCKING_FILTER : 0) |
(pps->lists_modification_present_flag ? V4L2_HEVC_PPS_FLAG_LISTS_MODIFICATION_PRESENT : 0) |
(pps->slice_segment_header_extension_present_flag ? V4L2_HEVC_PPS_FLAG_SLICE_SEGMENT_HEADER_EXTENSION_PRESENT : 0) |
(pps->deblocking_filter_control_present_flag ? V4L2_HEVC_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT : 0) |
(pps->uniform_spacing_flag ? V4L2_HEVC_PPS_FLAG_UNIFORM_SPACING : 0),
};
/* *INDENT-ON* */
if (pps->tiles_enabled_flag) {
self->pps.num_tile_columns_minus1 = pps->num_tile_columns_minus1;
self->pps.num_tile_rows_minus1 = pps->num_tile_rows_minus1;
/* This should not be needed if we use uniform spacing, but Cedrus driver
* depends on it for now. As GStreamer parser do set that, lets just pass
* the information we have. */
for (i = 0; i <= pps->num_tile_columns_minus1; i++)
self->pps.column_width_minus1[i] = pps->column_width_minus1[i];
for (i = 0; i <= pps->num_tile_rows_minus1; i++)
self->pps.row_height_minus1[i] = pps->row_height_minus1[i];
}
}
static void
gst_v4l2_codec_h265_dec_fill_scaling_matrix (GstV4l2CodecH265Dec * self,
GstH265PPS * pps)
{
GstH265ScalingList *sl;
gint i;
if (!pps->sps->scaling_list_enabled_flag) {
memset (&self->scaling_matrix, 0, sizeof (self->scaling_matrix));
return;
}
if (pps->scaling_list_data_present_flag)
sl = &pps->scaling_list;
else if (pps->sps->scaling_list_data_present_flag)
sl = &pps->sps->scaling_list;
/* The default scaling list is strored in the pps */
else
sl = &pps->scaling_list;
for (i = 0; i < G_N_ELEMENTS (sl->scaling_lists_4x4); i++)
gst_h265_quant_matrix_4x4_get_raster_from_uprightdiagonal
(self->scaling_matrix.scaling_list_4x4[i], sl->scaling_lists_4x4[i]);
for (i = 0; i < G_N_ELEMENTS (sl->scaling_lists_8x8); i++)
gst_h265_quant_matrix_8x8_get_raster_from_uprightdiagonal
(self->scaling_matrix.scaling_list_8x8[i], sl->scaling_lists_8x8[i]);
for (i = 0; i < G_N_ELEMENTS (sl->scaling_lists_16x16); i++)
gst_h265_quant_matrix_16x16_get_raster_from_uprightdiagonal
(self->scaling_matrix.scaling_list_16x16[i],
sl->scaling_lists_16x16[i]);
for (i = 0; i < G_N_ELEMENTS (sl->scaling_lists_32x32); i++)
gst_h265_quant_matrix_32x32_get_raster_from_uprightdiagonal
(self->scaling_matrix.scaling_list_32x32[i],
sl->scaling_lists_32x32[i]);
for (i = 0; i < G_N_ELEMENTS (sl->scaling_list_dc_coef_minus8_16x16); i++)
self->scaling_matrix.scaling_list_dc_coef_16x16[i] =
sl->scaling_list_dc_coef_minus8_16x16[i] + 8;
for (i = 0; i < G_N_ELEMENTS (sl->scaling_list_dc_coef_minus8_32x32); i++)
self->scaling_matrix.scaling_list_dc_coef_32x32[i] =
sl->scaling_list_dc_coef_minus8_32x32[i] + 8;
}
static guint
get_slice_header_byte_offset (GstH265Slice * slice)
{
guint epb_count, nal_header_bytes;
epb_count = slice->header.n_emulation_prevention_bytes;
nal_header_bytes = slice->nalu.header_bytes;
return nal_header_bytes + (slice->header.header_size + 7) / 8 - epb_count;
}
static void
gst_v4l2_codec_h265_dec_fill_slice_params (GstV4l2CodecH265Dec * self,
GstH265Slice * slice, GstH265Picture * picture)
{
gint n = self->num_slices++;
GstH265SliceHdr *slice_hdr = &slice->header;
GstH265PPS *pps = slice_hdr->pps;
gsize slice_size = slice->nalu.size;
gsize sc_offset = 0;
struct v4l2_ctrl_hevc_slice_params *params;
gint i, j;
gint chroma_weight, chroma_log2_weight_denom;
/* TODO adjust this if sps_ext is later supported */
const gint32 WpOffsetHalfRangeC = 1 << 7;
/* 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))
sc_offset = 3;
/* *INDENT-OFF* */
params = &g_array_index (self->slice_params, struct v4l2_ctrl_hevc_slice_params, n);
*params = (struct v4l2_ctrl_hevc_slice_params) {
.bit_size = (slice_size + sc_offset) * 8,
.data_byte_offset = get_slice_header_byte_offset (slice) + sc_offset,
.num_entry_point_offsets = slice_hdr->num_entry_point_offsets,
.nal_unit_type = slice->nalu.type,
.nuh_temporal_id_plus1 = slice->nalu.temporal_id_plus1,
.slice_type = slice_hdr->type,
.colour_plane_id = slice_hdr->colour_plane_id,
.slice_pic_order_cnt = picture->pic_order_cnt,
.num_ref_idx_l0_active_minus1 = slice_hdr->num_ref_idx_l0_active_minus1,
.num_ref_idx_l1_active_minus1 = slice_hdr->num_ref_idx_l1_active_minus1,
.collocated_ref_idx = slice_hdr->collocated_ref_idx,
.five_minus_max_num_merge_cand = slice_hdr->five_minus_max_num_merge_cand,
.slice_qp_delta = slice_hdr->qp_delta,
.slice_cb_qp_offset = slice_hdr->cb_qp_offset,
.slice_cr_qp_offset = slice_hdr->cr_qp_offset,
.slice_act_y_qp_offset = slice_hdr->slice_act_y_qp_offset,
.slice_act_cb_qp_offset = slice_hdr->slice_act_cb_qp_offset,
.slice_act_cr_qp_offset = slice_hdr->slice_act_cr_qp_offset,
.slice_beta_offset_div2 = slice_hdr->beta_offset_div2,
.slice_tc_offset_div2 = slice_hdr->tc_offset_div2,
.pic_struct = picture->pic_struct,
.slice_segment_addr = slice_hdr->segment_address,
.short_term_ref_pic_set_size = slice_hdr->short_term_ref_pic_set_size,
.long_term_ref_pic_set_size = slice_hdr->long_term_ref_pic_set_size,
.pred_weight_table = (struct v4l2_hevc_pred_weight_table) {
.luma_log2_weight_denom = slice_hdr->pred_weight_table.luma_log2_weight_denom,
.delta_chroma_log2_weight_denom = slice_hdr->pred_weight_table.delta_chroma_log2_weight_denom,
},
.flags =
(slice_hdr->sao_luma_flag ? V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_SAO_LUMA : 0) |
(slice_hdr->sao_chroma_flag ? V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_SAO_CHROMA : 0) |
(slice_hdr->temporal_mvp_enabled_flag ? V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_TEMPORAL_MVP_ENABLED : 0) |
(slice_hdr->mvd_l1_zero_flag ? V4L2_HEVC_SLICE_PARAMS_FLAG_MVD_L1_ZERO : 0) |
(slice_hdr->cabac_init_flag ? V4L2_HEVC_SLICE_PARAMS_FLAG_CABAC_INIT : 0) |
(slice_hdr->collocated_from_l0_flag ? V4L2_HEVC_SLICE_PARAMS_FLAG_COLLOCATED_FROM_L0 : 0) |
(slice_hdr->use_integer_mv_flag ? V4L2_HEVC_SLICE_PARAMS_FLAG_USE_INTEGER_MV : 0) |
(slice_hdr->deblocking_filter_disabled_flag ?
V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_DEBLOCKING_FILTER_DISABLED : 0) |
(slice_hdr->loop_filter_across_slices_enabled_flag ?
V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_LOOP_FILTER_ACROSS_SLICES_ENABLED : 0) |
(slice_hdr->dependent_slice_segment_flag ?
V4L2_HEVC_SLICE_PARAMS_FLAG_DEPENDENT_SLICE_SEGMENT : 0),
};
/* *INDENT-ON* */
for (i = 0; i < slice_hdr->num_entry_point_offsets; i++) {
guint32 entry_point_offset = slice_hdr->entry_point_offset_minus1[i] + 1;
g_array_append_val (self->entry_point_offsets, entry_point_offset);
}
if (GST_H265_IS_I_SLICE (slice_hdr) ||
(!pps->weighted_pred_flag && GST_H265_IS_P_SLICE (slice_hdr)) ||
(!pps->weighted_bipred_flag && GST_H265_IS_B_SLICE (slice_hdr)))
return;
for (i = 0; i <= slice_hdr->num_ref_idx_l0_active_minus1; i++) {
if (!slice_hdr->pred_weight_table.luma_weight_l0_flag[i])
continue;
params->pred_weight_table.delta_luma_weight_l0[i] =
slice_hdr->pred_weight_table.delta_luma_weight_l0[i];
params->pred_weight_table.luma_offset_l0[i] =
slice_hdr->pred_weight_table.luma_offset_l0[i];
}
chroma_log2_weight_denom =
slice_hdr->pred_weight_table.luma_log2_weight_denom +
slice_hdr->pred_weight_table.delta_chroma_log2_weight_denom;
if (slice_hdr->pps->sps->chroma_array_type != 0) {
for (i = 0; i <= slice_hdr->num_ref_idx_l0_active_minus1; i++) {
if (!slice_hdr->pred_weight_table.chroma_weight_l0_flag[i])
continue;
for (j = 0; j < 2; j++) {
gint16 delta_chroma_offset_l0 =
slice_hdr->pred_weight_table.delta_chroma_offset_l0[i][j];
gint chroma_offset;
params->pred_weight_table.delta_chroma_weight_l0[i][j] =
slice_hdr->pred_weight_table.delta_chroma_weight_l0[i][j];
/* Find ChromaWeightL0 */
chroma_weight = (1 << chroma_log2_weight_denom) +
slice_hdr->pred_weight_table.delta_chroma_weight_l0[i][j];
chroma_offset = WpOffsetHalfRangeC + delta_chroma_offset_l0 -
((WpOffsetHalfRangeC * chroma_weight) >> chroma_log2_weight_denom);
/* 7-56 */
params->pred_weight_table.chroma_offset_l0[i][j] =
CLAMP (chroma_offset, -WpOffsetHalfRangeC, WpOffsetHalfRangeC - 1);
}
}
}
/* Skip l1 if this is not a B-Frame. */
if (!GST_H265_IS_B_SLICE (slice_hdr))
return;
for (i = 0; i <= slice_hdr->num_ref_idx_l1_active_minus1; i++) {
if (!slice_hdr->pred_weight_table.luma_weight_l1_flag[i])
continue;
params->pred_weight_table.delta_luma_weight_l1[i] =
slice_hdr->pred_weight_table.delta_luma_weight_l1[i];
params->pred_weight_table.luma_offset_l1[i] =
slice_hdr->pred_weight_table.luma_offset_l1[i];
}
if (slice_hdr->pps->sps->chroma_array_type != 0) {
for (i = 0; i <= slice_hdr->num_ref_idx_l1_active_minus1; i++) {
if (!slice_hdr->pred_weight_table.chroma_weight_l1_flag[i])
continue;
for (j = 0; j < 2; j++) {
gint16 delta_chroma_offset_l1 =
slice_hdr->pred_weight_table.delta_chroma_offset_l1[i][j];
gint chroma_offset;
params->pred_weight_table.delta_chroma_weight_l1[i][j] =
slice_hdr->pred_weight_table.delta_chroma_weight_l1[i][j];
/* Find ChromaWeightL1 */
chroma_weight = (1 << chroma_log2_weight_denom) +
slice_hdr->pred_weight_table.delta_chroma_weight_l1[i][j];
chroma_offset = WpOffsetHalfRangeC + delta_chroma_offset_l1 -
((WpOffsetHalfRangeC * chroma_weight) >> chroma_log2_weight_denom);
/* 7-56 */
params->pred_weight_table.chroma_offset_l1[i][j] =
CLAMP (chroma_offset, -WpOffsetHalfRangeC, WpOffsetHalfRangeC - 1);
}
}
}
}
static guint8
lookup_dpb_index (struct v4l2_hevc_dpb_entry dpb[16], GstH265Picture * 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;
ref_ts = GST_CODEC_PICTURE_TS_NS (ref_pic);
for (i = 0; i < 16; i++) {
if (dpb[i].timestamp == ref_ts)
return i;
}
return 0xff;
}
static void
gst_v4l2_codec_h265_dec_fill_references (GstV4l2CodecH265Dec * self,
GArray * ref_pic_list0, GArray * ref_pic_list1)
{
struct v4l2_ctrl_hevc_slice_params *slice_params;
struct v4l2_ctrl_hevc_decode_params *decode_params = &self->decode_params;
gint i;
slice_params = &g_array_index (self->slice_params,
struct v4l2_ctrl_hevc_slice_params, self->num_slices - 1);
memset (slice_params->ref_idx_l0, 0xff, sizeof (slice_params->ref_idx_l0));
memset (slice_params->ref_idx_l1, 0xff, sizeof (slice_params->ref_idx_l1));
for (i = 0; i < ref_pic_list0->len; i++) {
GstH265Picture *ref_pic =
g_array_index (ref_pic_list0, GstH265Picture *, i);
slice_params->ref_idx_l0[i] =
lookup_dpb_index (decode_params->dpb, ref_pic);
}
for (i = 0; i < ref_pic_list1->len; i++) {
GstH265Picture *ref_pic =
g_array_index (ref_pic_list1, GstH265Picture *, i);
slice_params->ref_idx_l1[i] =
lookup_dpb_index (decode_params->dpb, ref_pic);
}
}
static GstFlowReturn
gst_v4l2_codec_h265_dec_new_sequence (GstH265Decoder * decoder,
const GstH265SPS * sps, gint max_dpb_size)
{
GstV4l2CodecH265Dec *self = GST_V4L2_CODEC_H265_DEC (decoder);
gint crop_width = sps->width;
gint crop_height = sps->height;
gboolean negotiation_needed = FALSE;
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;
}
self->need_crop = FALSE;
if (sps->conformance_window_flag) {
crop_width = sps->crop_rect_width;
crop_height = sps->crop_rect_height;
self->crop_rect_width = sps->crop_rect_width;
self->crop_rect_height = sps->crop_rect_height;
self->crop_rect_x = sps->crop_rect_x;
self->crop_rect_y = sps->crop_rect_y;
/* conformance_window_flag could be set but with zeroed
* parameters so check if we really need to crop */
self->need_crop |= self->crop_rect_width != sps->width;
self->need_crop |= self->crop_rect_height != sps->height;
self->need_crop |= self->crop_rect_x != 0;
self->need_crop |= self->crop_rect_y != 0;
}
/* 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);
}
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_h265_dec_fill_sequence (self, sps);
if (negotiation_needed) {
gst_v4l2_codec_h265_dec_streamoff (self);
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 = self->need_crop;
}
return GST_FLOW_OK;
}
static gboolean
gst_v4l2_codec_h265_dec_ensure_bitstream (GstV4l2CodecH265Dec * 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 H265 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 void
gst_v4l2_codec_h265_dec_fill_decode_params (GstV4l2CodecH265Dec * self,
GstH265Picture * picture, GstH265Slice * slice, GstH265Dpb * dpb)
{
GstH265Decoder *decoder = (GstH265Decoder *) self;
GArray *refs = gst_h265_dpb_get_pictures_all (dpb);
gint i;
/* *INDENT-OFF* */
self->decode_params = (struct v4l2_ctrl_hevc_decode_params) {
.pic_order_cnt_val = picture->pic_order_cnt,
.num_poc_st_curr_before = decoder->NumPocStCurrBefore,
.num_poc_st_curr_after = decoder->NumPocStCurrAfter,
.num_poc_lt_curr = decoder->NumPocLtCurr,
.num_delta_pocs_of_ref_rps_idx = slice->header.short_term_ref_pic_sets.NumDeltaPocsOfRefRpsIdx,
.flags =
(GST_H265_IS_NAL_TYPE_IRAP (slice->nalu.type) ? V4L2_HEVC_DECODE_PARAM_FLAG_IRAP_PIC : 0) |
(GST_H265_IS_NAL_TYPE_IDR (slice->nalu.type) ? V4L2_HEVC_DECODE_PARAM_FLAG_IDR_PIC : 0) |
(slice->header.no_output_of_prior_pics_flag ? V4L2_HEVC_DECODE_PARAM_FLAG_NO_OUTPUT_OF_PRIOR : 0),
};
/* *INDENT-ON* */
for (i = 0; i < refs->len; i++) {
GstH265Picture *ref_pic = g_array_index (refs, GstH265Picture *, i);
if (!ref_pic->ref)
continue;
/* *INDENT-OFF* */
self->decode_params.dpb[self->decode_params.num_active_dpb_entries++] =
(struct v4l2_hevc_dpb_entry) {
/*
* The reference is multiplied by 1000 because it's wassed as micro
* seconds and this TS is nanosecond.
*/
.timestamp = (guint64) GST_CODEC_PICTURE_FRAME_NUMBER (ref_pic) * 1000,
.flags = ref_pic->long_term ? V4L2_HEVC_DPB_ENTRY_LONG_TERM_REFERENCE : 0,
.field_pic = ref_pic->pic_struct,
.pic_order_cnt_val = ref_pic->pic_order_cnt,
};
/* *INDENT-ON* */
}
for (i = 0; i < 16; i++) {
self->decode_params.poc_st_curr_before[i] =
lookup_dpb_index (self->decode_params.dpb,
decoder->RefPicSetStCurrBefore[i]);
self->decode_params.poc_st_curr_after[i] =
lookup_dpb_index (self->decode_params.dpb,
decoder->RefPicSetStCurrAfter[i]);
self->decode_params.poc_lt_curr[i] =
lookup_dpb_index (self->decode_params.dpb, decoder->RefPicSetLtCurr[i]);
}
g_array_unref (refs);
}
static GstFlowReturn
gst_v4l2_codec_h265_dec_start_picture (GstH265Decoder * decoder,
GstH265Picture * picture, GstH265Slice * slice, GstH265Dpb * dpb)
{
GstV4l2CodecH265Dec *self = GST_V4L2_CODEC_H265_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_h265_dec_ensure_bitstream (self))
return GST_FLOW_ERROR;
/* The base class will only emit new_sequence for allocation related changes
* in the SPS, make sure to keep the SPS upt-to-date */
if (slice->header.pps->sps->id != self->sps.seq_parameter_set_id)
gst_v4l2_codec_h265_dec_fill_sequence (self, slice->header.pps->sps);
gst_v4l2_codec_h265_dec_fill_pps (self, slice->header.pps);
gst_v4l2_codec_h265_dec_fill_scaling_matrix (self, slice->header.pps);
gst_v4l2_codec_h265_dec_fill_decode_params (self, picture, slice, dpb);
self->first_slice = TRUE;
self->num_slices = 0;
g_array_set_size (self->entry_point_offsets, 0);
return GST_FLOW_OK;
}
static gboolean
gst_v4l2_codec_h265_dec_crop_output_buffer (GstV4l2CodecH265Dec * self,
GstVideoFrame * dest_frame, GstVideoFrame * src_frame)
{
GstVideoInfo dst_info = dest_frame->info;
dst_info.fps_n = src_frame->info.fps_n;
dst_info.fps_d = src_frame->info.fps_d;
if (self->convert) {
gboolean new_convert = FALSE;
gint x = 0, y = 0, width = 0, height = 0;
const GstStructure *config = gst_video_converter_get_config (self->convert);
if (!gst_structure_get_int (config, GST_VIDEO_CONVERTER_OPT_SRC_X, &x)
|| !gst_structure_get_int (config, GST_VIDEO_CONVERTER_OPT_SRC_Y, &y)
|| !gst_structure_get_int (config, GST_VIDEO_CONVERTER_OPT_SRC_WIDTH,
&width)
|| !gst_structure_get_int (config, GST_VIDEO_CONVERTER_OPT_SRC_HEIGHT,
&height))
new_convert = TRUE;
new_convert |= (self->crop_rect_x != x);
new_convert |= (self->crop_rect_y != y);
new_convert |= (self->crop_rect_width != width);
new_convert |= (self->crop_rect_height != height);
/* No need to check dest, it always has (0,0) -> (width, height) */
if (new_convert)
g_clear_pointer (&self->convert, gst_video_converter_free);
}
if (!self->convert) {
self->convert = gst_video_converter_new (&src_frame->info, &dst_info,
gst_structure_new ("options",
GST_VIDEO_CONVERTER_OPT_DITHER_METHOD,
GST_TYPE_VIDEO_DITHER_METHOD, GST_VIDEO_DITHER_NONE,
GST_VIDEO_CONVERTER_OPT_DITHER_QUANTIZATION,
G_TYPE_UINT, 0,
GST_VIDEO_CONVERTER_OPT_CHROMA_MODE,
GST_TYPE_VIDEO_CHROMA_MODE, GST_VIDEO_CHROMA_MODE_NONE,
GST_VIDEO_CONVERTER_OPT_MATRIX_MODE,
GST_TYPE_VIDEO_MATRIX_MODE, GST_VIDEO_MATRIX_MODE_NONE,
GST_VIDEO_CONVERTER_OPT_SRC_X, G_TYPE_INT, self->crop_rect_x,
GST_VIDEO_CONVERTER_OPT_SRC_Y, G_TYPE_INT, self->crop_rect_y,
GST_VIDEO_CONVERTER_OPT_SRC_WIDTH, G_TYPE_INT,
self->crop_rect_width, GST_VIDEO_CONVERTER_OPT_SRC_HEIGHT,
G_TYPE_INT, self->crop_rect_height, GST_VIDEO_CONVERTER_OPT_DEST_X,
G_TYPE_INT, 0, GST_VIDEO_CONVERTER_OPT_DEST_Y, G_TYPE_INT, 0,
GST_VIDEO_CONVERTER_OPT_DEST_WIDTH, G_TYPE_INT, self->display_width,
GST_VIDEO_CONVERTER_OPT_DEST_HEIGHT, G_TYPE_INT,
self->display_height, NULL));
if (!self->convert) {
GST_WARNING_OBJECT (self, "failed to create a video convert");
return FALSE;
}
}
gst_video_converter_frame (self->convert, src_frame, dest_frame);
return TRUE;
}
static gboolean
gst_v4l2_codec_h265_dec_copy_output_buffer (GstV4l2CodecH265Dec * 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;
}
if (self->need_crop) {
if (!gst_v4l2_codec_h265_dec_crop_output_buffer (self, &dest_frame,
&src_frame)) {
gst_video_frame_unmap (&src_frame);
gst_video_frame_unmap (&dest_frame);
GST_ERROR_OBJECT (self, "fail to apply the video crop.");
goto fail;
}
} else {
/* 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_h265_dec_output_picture (GstH265Decoder * decoder,
GstVideoCodecFrame * frame, GstH265Picture * picture)
{
GstV4l2CodecH265Dec *self = GST_V4L2_CODEC_H265_DEC (decoder);
GstVideoDecoder *vdec = GST_VIDEO_DECODER (decoder);
GstV4l2Request *request = gst_h265_picture_get_user_data (picture);
GstCodecPicture *codec_picture = GST_CODEC_PICTURE (picture);
gint ret;
if (codec_picture->discont_state) {
if (!gst_video_decoder_negotiate (vdec)) {
GST_ERROR_OBJECT (vdec, "Could not re-negotiate with updated state");
return FALSE;
}
}
GST_DEBUG_OBJECT (self, "Output picture %u",
codec_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", codec_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", codec_picture->system_frame_number),
(NULL));
goto error;
}
/* Hold on reference buffers for the rest of the picture lifetime */
gst_h265_picture_set_user_data (picture,
gst_buffer_ref (frame->output_buffer), (GDestroyNotify) gst_buffer_unref);
if (self->copy_frames)
gst_v4l2_codec_h265_dec_copy_output_buffer (self, frame);
gst_h265_picture_unref (picture);
return gst_video_decoder_finish_frame (vdec, frame);
error:
gst_video_decoder_drop_frame (vdec, frame);
gst_h265_picture_unref (picture);
return GST_FLOW_ERROR;
}
static void
gst_v4l2_codec_h265_dec_reset_picture (GstV4l2CodecH265Dec * 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;
g_array_set_size (self->entry_point_offsets, 0);
}
static gboolean
gst_v4l2_codec_h265_dec_ensure_output_buffer (GstV4l2CodecH265Dec * 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_h265_dec_submit_bitstream (GstV4l2CodecH265Dec * self,
GstH265Picture * picture, guint flags)
{
GstV4l2Request *prev_request, *request = NULL;
gsize bytesused;
gboolean ret = FALSE;
gint num_controls = 0;
/* *INDENT-OFF* */
/* Reserve space for controls */
struct v4l2_ext_control control[] = {
{ }, /* SPS */
{ }, /* PPS */
{ }, /* DECODE_PARAMS */
{ }, /* SLICE_PARAMS */
{ }, /* SCALING_MATRIX */
{ }, /* ENTRY_POINT_OFFSETS */
};
/* *INDENT-ON* */
prev_request = gst_h265_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;
guint32 system_frame_number = GST_CODEC_PICTURE_FRAME_NUMBER (picture);
frame = gst_video_decoder_get_frame (GST_VIDEO_DECODER (self),
system_frame_number);
g_return_val_if_fail (frame, FALSE);
if (!gst_v4l2_codec_h265_dec_ensure_output_buffer (self, frame))
goto done;
request = gst_v4l2_decoder_alloc_request (self->decoder,
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[num_controls].id = V4L2_CID_STATELESS_HEVC_SPS;
control[num_controls].ptr = &self->sps;
control[num_controls].size = sizeof (self->sps);
num_controls++;
self->need_sequence = FALSE;
}
if (self->first_slice) {
control[num_controls].id = V4L2_CID_STATELESS_HEVC_PPS;
control[num_controls].ptr = &self->pps;
control[num_controls].size = sizeof (self->pps);
num_controls++;
if (self->support_scaling_matrix) {
control[num_controls].id = V4L2_CID_STATELESS_HEVC_SCALING_MATRIX;
control[num_controls].ptr = &self->scaling_matrix;
control[num_controls].size = sizeof (self->scaling_matrix);
num_controls++;
}
control[num_controls].id = V4L2_CID_STATELESS_HEVC_DECODE_PARAMS;
control[num_controls].ptr = &self->decode_params;
control[num_controls].size = sizeof (self->decode_params);
num_controls++;
self->first_slice = FALSE;
}
/* Slice parameters are only filled for slice based or frame based with
* slices decoders */
if (self->num_slices && !is_frame_based (self)) {
control[num_controls].id = V4L2_CID_STATELESS_HEVC_SLICE_PARAMS;
control[num_controls].ptr = self->slice_params->data;
control[num_controls].size = g_array_get_element_size (self->slice_params)
* self->num_slices;
num_controls++;
if (self->support_entry_point_offsets && self->entry_point_offsets->len) {
control[num_controls].id = V4L2_CID_STATELESS_HEVC_ENTRY_POINT_OFFSETS;
control[num_controls].ptr = self->entry_point_offsets->data;
control[num_controls].size =
g_array_get_element_size (self->entry_point_offsets)
* self->entry_point_offsets->len;
num_controls++;
}
}
if (num_controls > G_N_ELEMENTS (control))
g_error ("Set too many controls, increase control[] size");
if (!gst_v4l2_decoder_set_controls (self->decoder, request, control,
num_controls)) {
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_h265_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_h265_dec_reset_picture (self);
return ret;
}
static GstFlowReturn
gst_v4l2_codec_h265_dec_decode_slice (GstH265Decoder * decoder,
GstH265Picture * picture, GstH265Slice * slice,
GArray * ref_pic_list0, GArray * ref_pic_list1)
{
GstV4l2CodecH265Dec *self = GST_V4L2_CODEC_H265_DEC (decoder);
gsize sc_off = 0;
gsize nal_size;
guint8 *bitstream_data;
if (!is_frame_based (self)) {
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_h265_dec_submit_bitstream (self, picture,
V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF)
|| !gst_v4l2_codec_h265_dec_ensure_bitstream (self))
return GST_FLOW_ERROR;
}
}
/* in frame based mode with slices, we need to provide the required data for
* the whole frame, therefore we don't submit the bitstream here */
gst_v4l2_codec_h265_dec_fill_slice_params (self, slice, picture);
gst_v4l2_codec_h265_dec_fill_references (self, ref_pic_list0,
ref_pic_list1);
}
/* if it is the first slice segment provide the short and long term
* reference pictures set size */
if (slice->header.first_slice_segment_in_pic_flag) {
struct v4l2_ctrl_hevc_decode_params *decode_params = &self->decode_params;
decode_params->short_term_ref_pic_set_size =
slice->header.short_term_ref_pic_set_size;
decode_params->long_term_ref_pic_set_size =
slice->header.long_term_ref_pic_set_size;
}
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 H265 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_h265_dec_end_picture (GstH265Decoder * decoder,
GstH265Picture * picture)
{
GstV4l2CodecH265Dec *self = GST_V4L2_CODEC_H265_DEC (decoder);
if (!gst_v4l2_codec_h265_dec_submit_bitstream (self, picture, 0))
return GST_FLOW_ERROR;
return GST_FLOW_OK;
}
static guint
gst_v4l2_codec_h265_dec_get_preferred_output_delay (GstH265Decoder * decoder,
gboolean is_live)
{
GstV4l2CodecH265Dec *self = GST_V4L2_CODEC_H265_DEC (decoder);
guint delay;
if (is_live)
delay = 0;
else
delay = 1;
gst_v4l2_decoder_set_render_delay (self->decoder, delay);
return delay;
}
static void
gst_v4l2_codec_h265_dec_set_flushing (GstV4l2CodecH265Dec * 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_h265_dec_flush (GstVideoDecoder * decoder)
{
GstV4l2CodecH265Dec *self = GST_V4L2_CODEC_H265_DEC (decoder);
GST_DEBUG_OBJECT (self, "Flushing decoder state.");
gst_v4l2_decoder_flush (self->decoder);
gst_v4l2_codec_h265_dec_set_flushing (self, FALSE);
return GST_VIDEO_DECODER_CLASS (parent_class)->flush (decoder);
}
static gboolean
gst_v4l2_codec_h265_dec_sink_event (GstVideoDecoder * decoder, GstEvent * event)
{
GstV4l2CodecH265Dec *self = GST_V4L2_CODEC_H265_DEC (decoder);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
GST_DEBUG_OBJECT (self, "flush start");
gst_v4l2_codec_h265_dec_set_flushing (self, TRUE);
break;
default:
break;
}
return GST_VIDEO_DECODER_CLASS (parent_class)->sink_event (decoder, event);
}
static GstStateChangeReturn
gst_v4l2_codec_h265_dec_change_state (GstElement * element,
GstStateChange transition)
{
GstV4l2CodecH265Dec *self = GST_V4L2_CODEC_H265_DEC (element);
if (transition == GST_STATE_CHANGE_PAUSED_TO_READY)
gst_v4l2_codec_h265_dec_set_flushing (self, TRUE);
return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
}
static void
gst_v4l2_codec_h265_dec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstV4l2CodecH265Dec *self = GST_V4L2_CODEC_H265_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_h265_dec_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstV4l2CodecH265Dec *self = GST_V4L2_CODEC_H265_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_h265_dec_init (GstV4l2CodecH265Dec * self)
{
}
static void
gst_v4l2_codec_h265_dec_subinit (GstV4l2CodecH265Dec * self,
GstV4l2CodecH265DecClass * klass)
{
self->decoder = gst_v4l2_decoder_new (klass->device);
gst_video_info_init (&self->vinfo);
gst_video_info_dma_drm_init (&self->vinfo_drm);
self->slice_params = g_array_sized_new (FALSE, TRUE,
sizeof (struct v4l2_ctrl_hevc_slice_params), 4);
g_array_set_size (self->slice_params, 4);
self->entry_point_offsets = g_array_sized_new (FALSE, TRUE,
sizeof (guint32), 4);
}
static void
gst_v4l2_codec_h265_dec_dispose (GObject * object)
{
GstV4l2CodecH265Dec *self = GST_V4L2_CODEC_H265_DEC (object);
g_clear_object (&self->decoder);
g_clear_pointer (&self->slice_params, g_array_unref);
g_clear_pointer (&self->entry_point_offsets, g_array_unref);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_v4l2_codec_h265_dec_class_init (GstV4l2CodecH265DecClass * klass)
{
}
static void
gst_v4l2_codec_h265_dec_subclass_init (GstV4l2CodecH265DecClass * 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);
GstH265DecoderClass *h265decoder_class = GST_H265_DECODER_CLASS (klass);
gobject_class->set_property = gst_v4l2_codec_h265_dec_set_property;
gobject_class->get_property = gst_v4l2_codec_h265_dec_get_property;
gobject_class->dispose = gst_v4l2_codec_h265_dec_dispose;
gst_element_class_set_static_metadata (element_class,
"V4L2 Stateless H.265 Video Decoder",
"Codec/Decoder/Video/Hardware",
"A V4L2 based H.265 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_h265_dec_change_state);
decoder_class->open = GST_DEBUG_FUNCPTR (gst_v4l2_codec_h265_dec_open);
decoder_class->close = GST_DEBUG_FUNCPTR (gst_v4l2_codec_h265_dec_close);
decoder_class->stop = GST_DEBUG_FUNCPTR (gst_v4l2_codec_h265_dec_stop);
decoder_class->negotiate =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h265_dec_negotiate);
decoder_class->decide_allocation =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h265_dec_decide_allocation);
decoder_class->flush = GST_DEBUG_FUNCPTR (gst_v4l2_codec_h265_dec_flush);
decoder_class->sink_event =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h265_dec_sink_event);
h265decoder_class->new_sequence =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h265_dec_new_sequence);
h265decoder_class->output_picture =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h265_dec_output_picture);
h265decoder_class->start_picture =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h265_dec_start_picture);
h265decoder_class->decode_slice =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h265_dec_decode_slice);
h265decoder_class->end_picture =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h265_dec_end_picture);
h265decoder_class->get_preferred_output_delay =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h265_dec_get_preferred_output_delay);
klass->device = device;
gst_v4l2_decoder_install_properties (gobject_class, PROP_LAST, device);
}
void
gst_v4l2_codec_h265_dec_register (GstPlugin * plugin, GstV4l2Decoder * decoder,
GstV4l2CodecDevice * device, guint rank)
{
GstCaps *src_caps;
guint version;
GST_DEBUG_CATEGORY_INIT (v4l2_h265dec_debug, "v4l2codecs-h265dec", 0,
"V4L2 stateless h265 decoder");
if (!gst_v4l2_decoder_set_sink_fmt (decoder, V4L2_PIX_FMT_HEVC_SLICE,
320, 240, 8))
return;
src_caps = gst_v4l2_decoder_enum_src_formats (decoder, &static_src_caps);
if (gst_caps_is_empty (src_caps)) {
GST_WARNING ("Not registering H265 decoder since it produces no "
"supported format");
goto done;
}
version = gst_v4l2_decoder_get_version (decoder);
if (version < V4L2_MIN_KERNEL_VERSION)
GST_WARNING ("V4L2 API v%u.%u too old, at least v%u.%u required",
(version >> 16) & 0xff, (version >> 8) & 0xff,
V4L2_MIN_KERNEL_VER_MAJOR, V4L2_MIN_KERNEL_VER_MINOR);
if (!gst_v4l2_decoder_h265_api_check (decoder)) {
GST_WARNING ("Not registering H265 decoder as it failed ABI check.");
goto done;
}
gst_v4l2_decoder_register (plugin, GST_TYPE_V4L2_CODEC_H265_DEC,
(GClassInitFunc) gst_v4l2_codec_h265_dec_subclass_init,
gst_mini_object_ref (GST_MINI_OBJECT (device)),
(GInstanceInitFunc) gst_v4l2_codec_h265_dec_subinit,
"v4l2sl%sh265dec", device, rank, NULL);
done:
gst_caps_unref (src_caps);
}
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