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gstreamer/subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c
Nicolas Dufresne 21b2d9cea2 v4l2codecs: vp9: Fix reset_frame_context parameter 
It was assumed that the kernel parameters would match with the bitstream value
but instead the author when with another set of value. Surprisingly, this
makes no difference with the resulting fluster score.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1754>
2022-02-20 20:39:36 +00:00

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/* GStreamer
* Copyright (C) 2021 Daniel Almeida <daniel.almeida@collabora.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "gstv4l2codecallocator.h"
#include "gstv4l2codecalphadecodebin.h"
#include "gstv4l2codecpool.h"
#include "gstv4l2codecvp9dec.h"
#include "gstv4l2format.h"
#include "linux/v4l2-controls.h"
#include "linux/videodev2.h"
GST_DEBUG_CATEGORY_STATIC (v4l2_vp9dec_debug);
#define GST_CAT_DEFAULT v4l2_vp9dec_debug
/* Used to mark picture that have been outputed */
#define FLAG_PICTURE_OUTPUTED GST_MINI_OBJECT_FLAG_LAST
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-vp9, " "alignment=(string) frame")
);
static GstStaticPadTemplate alpha_template =
GST_STATIC_PAD_TEMPLATE (GST_VIDEO_DECODER_SINK_NAME,
GST_PAD_SINK, GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-vp9, codec-alpha = (boolean) true, "
"alignment = frame")
);
static GstStaticPadTemplate src_template =
GST_STATIC_PAD_TEMPLATE (GST_VIDEO_DECODER_SRC_NAME,
GST_PAD_SRC, GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (GST_V4L2_DEFAULT_VIDEO_FORMATS)));
struct _GstV4l2CodecVp9Dec
{
GstVp9Decoder parent;
GstV4l2Decoder *decoder;
GstVideoCodecState *output_state;
GstVideoInfo vinfo;
gint width;
gint height;
GstV4l2CodecAllocator *sink_allocator;
GstV4l2CodecAllocator *src_allocator;
GstV4l2CodecPool *src_pool;
gboolean has_videometa;
gboolean need_negotiation;
gboolean copy_frames;
struct v4l2_ctrl_vp9_frame v4l2_vp9_frame;
struct v4l2_ctrl_vp9_compressed_hdr v4l2_delta_probs;
GstMemory *bitstream;
GstMapInfo bitstream_map;
/* will renegotiate if parser reports new values */
guint bit_depth;
guint color_range;
guint profile;
guint color_space;
guint subsampling_x;
guint subsampling_y;
};
G_DEFINE_ABSTRACT_TYPE (GstV4l2CodecVp9Dec, gst_v4l2_codec_vp9_dec,
GST_TYPE_VP9_DECODER);
#define parent_class gst_v4l2_codec_vp9_dec_parent_class
static guint
gst_v4l2_codec_vp9_dec_get_preferred_output_delay (GstVp9Decoder * decoder,
gboolean is_live)
{
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_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_vp9_dec_fill_lf_params (GstV4l2CodecVp9Dec * self,
const GstVp9LoopFilterParams * lf)
{
gint i;
G_STATIC_ASSERT (sizeof (self->v4l2_vp9_frame.lf.ref_deltas) ==
sizeof (lf->loop_filter_ref_deltas));
G_STATIC_ASSERT (sizeof (self->v4l2_vp9_frame.lf.mode_deltas) ==
sizeof (lf->loop_filter_mode_deltas));
for (i = 0; i < G_N_ELEMENTS (self->v4l2_vp9_frame.lf.ref_deltas); i++)
self->v4l2_vp9_frame.lf.ref_deltas[i] = lf->loop_filter_ref_deltas[i];
for (i = 0; i < G_N_ELEMENTS (self->v4l2_vp9_frame.lf.mode_deltas); i++)
self->v4l2_vp9_frame.lf.mode_deltas[i] = lf->loop_filter_mode_deltas[i];
}
static void
gst_v4l2_codec_vp9_dec_fill_seg_params (GstV4l2CodecVp9Dec * self,
const GstVp9SegmentationParams * s)
{
guint i;
struct v4l2_vp9_segmentation *v4l2_segmentation = &self->v4l2_vp9_frame.seg;
G_STATIC_ASSERT (sizeof (v4l2_segmentation->tree_probs) ==
sizeof (s->segmentation_tree_probs));
G_STATIC_ASSERT (sizeof (v4l2_segmentation->pred_probs) ==
sizeof (s->segmentation_pred_prob));
G_STATIC_ASSERT (sizeof (v4l2_segmentation->feature_data) ==
sizeof (s->feature_data));
for (i = 0; i < G_N_ELEMENTS (v4l2_segmentation->tree_probs); i++) {
v4l2_segmentation->tree_probs[i] = s->segmentation_tree_probs[i];
}
for (i = 0; i < G_N_ELEMENTS (v4l2_segmentation->pred_probs); i++) {
v4l2_segmentation->pred_probs[i] = s->segmentation_pred_prob[i];
}
for (i = 0; i < G_N_ELEMENTS (v4l2_segmentation->feature_enabled); i++) {
/* see 3. Symbols (and abbreviated terms) for reference */
/* *INDENT-OFF* */
v4l2_segmentation->feature_enabled[i] =
(s->feature_enabled[i][GST_VP9_SEG_LVL_ALT_Q] ? V4L2_VP9_SEGMENT_FEATURE_ENABLED(V4L2_VP9_SEG_LVL_ALT_Q) : 0) |
(s->feature_enabled[i][GST_VP9_SEG_LVL_ALT_L] ? V4L2_VP9_SEGMENT_FEATURE_ENABLED(V4L2_VP9_SEG_LVL_ALT_L) : 0) |
(s->feature_enabled[i][GST_VP9_SEG_LVL_REF_FRAME] ? V4L2_VP9_SEGMENT_FEATURE_ENABLED(V4L2_VP9_SEG_LVL_REF_FRAME) : 0) |
(s->feature_enabled[i][GST_VP9_SEG_SEG_LVL_SKIP] ? V4L2_VP9_SEGMENT_FEATURE_ENABLED(V4L2_VP9_SEG_LVL_SKIP) : 0);
/* *INDENT-ON* */
}
memcpy (v4l2_segmentation->feature_data, s->feature_data,
sizeof (v4l2_segmentation->feature_data));
}
static void
gst_v4l2_codec_vp9_dec_fill_prob_updates (GstV4l2CodecVp9Dec * self,
const GstVp9FrameHeader * h)
{
struct v4l2_ctrl_vp9_compressed_hdr *probs = &self->v4l2_delta_probs;
G_STATIC_ASSERT (sizeof (probs->tx8) ==
sizeof (h->delta_probabilities.tx_probs_8x8));
G_STATIC_ASSERT (sizeof (probs->tx16) ==
sizeof (h->delta_probabilities.tx_probs_16x16));
G_STATIC_ASSERT (sizeof (probs->tx32) ==
sizeof (h->delta_probabilities.tx_probs_32x32));
G_STATIC_ASSERT (sizeof (probs->coef) ==
sizeof (h->delta_probabilities.coef));
G_STATIC_ASSERT (sizeof (probs->skip) ==
sizeof (h->delta_probabilities.skip));
G_STATIC_ASSERT (sizeof (probs->inter_mode) ==
sizeof (h->delta_probabilities.inter_mode));
G_STATIC_ASSERT (sizeof (probs->interp_filter) ==
sizeof (h->delta_probabilities.interp_filter));
G_STATIC_ASSERT (sizeof (probs->is_inter) ==
sizeof (h->delta_probabilities.is_inter));
G_STATIC_ASSERT (sizeof (probs->comp_mode) ==
sizeof (h->delta_probabilities.comp_mode));
G_STATIC_ASSERT (sizeof (probs->single_ref) ==
sizeof (h->delta_probabilities.single_ref));
G_STATIC_ASSERT (sizeof (probs->comp_ref) ==
sizeof (h->delta_probabilities.comp_ref));
G_STATIC_ASSERT (sizeof (probs->y_mode) ==
sizeof (h->delta_probabilities.y_mode));
G_STATIC_ASSERT (sizeof (probs->partition) ==
sizeof (h->delta_probabilities.partition));
G_STATIC_ASSERT (sizeof (probs->mv.joint) ==
sizeof (h->delta_probabilities.mv.joint));
G_STATIC_ASSERT (sizeof (probs->mv.sign) ==
sizeof (h->delta_probabilities.mv.sign));
G_STATIC_ASSERT (sizeof (probs->mv.classes) ==
sizeof (h->delta_probabilities.mv.klass));
G_STATIC_ASSERT (sizeof (probs->mv.class0_bit) ==
sizeof (h->delta_probabilities.mv.class0_bit));
G_STATIC_ASSERT (sizeof (probs->mv.bits) ==
sizeof (h->delta_probabilities.mv.bits));
G_STATIC_ASSERT (sizeof (probs->mv.class0_fr) ==
sizeof (h->delta_probabilities.mv.class0_fr));
G_STATIC_ASSERT (sizeof (probs->mv.fr) ==
sizeof (h->delta_probabilities.mv.fr));
G_STATIC_ASSERT (sizeof (probs->mv.class0_hp) ==
sizeof (h->delta_probabilities.mv.class0_hp));
G_STATIC_ASSERT (sizeof (probs->mv.hp) ==
sizeof (h->delta_probabilities.mv.hp));
memset (probs, 0, sizeof (*probs));
probs->tx_mode = h->tx_mode;
memcpy (probs->tx8, h->delta_probabilities.tx_probs_8x8, sizeof (probs->tx8));
memcpy (probs->tx16, h->delta_probabilities.tx_probs_16x16,
sizeof (probs->tx16));
memcpy (probs->tx32, h->delta_probabilities.tx_probs_32x32,
sizeof (probs->tx32));
memcpy (probs->coef, h->delta_probabilities.coef, sizeof (probs->coef));
memcpy (probs->skip, h->delta_probabilities.skip, sizeof (probs->skip));
memcpy (probs->inter_mode, h->delta_probabilities.inter_mode,
sizeof (probs->inter_mode));
memcpy (probs->interp_filter,
h->delta_probabilities.interp_filter, sizeof (probs->interp_filter));
memcpy (probs->is_inter, h->delta_probabilities.is_inter,
sizeof (probs->is_inter));
memcpy (probs->comp_mode, h->delta_probabilities.comp_mode,
sizeof (probs->comp_mode));
memcpy (probs->single_ref, h->delta_probabilities.single_ref,
sizeof (probs->single_ref));
memcpy (probs->comp_ref, h->delta_probabilities.comp_ref,
sizeof (probs->comp_ref));
memcpy (probs->y_mode, h->delta_probabilities.y_mode, sizeof (probs->y_mode));
memcpy (probs->partition, h->delta_probabilities.partition,
sizeof (probs->partition));
memcpy (probs->mv.joint, h->delta_probabilities.mv.joint,
sizeof (h->delta_probabilities.mv.joint));
memcpy (probs->mv.sign, h->delta_probabilities.mv.sign,
sizeof (h->delta_probabilities.mv.sign));
memcpy (probs->mv.classes, h->delta_probabilities.mv.klass,
sizeof (h->delta_probabilities.mv.klass));
memcpy (probs->mv.class0_bit,
h->delta_probabilities.mv.class0_bit,
sizeof (h->delta_probabilities.mv.class0_bit));
memcpy (probs->mv.bits, h->delta_probabilities.mv.bits,
sizeof (h->delta_probabilities.mv.bits));
memcpy (probs->mv.class0_fr, h->delta_probabilities.mv.class0_fr,
sizeof (h->delta_probabilities.mv.class0_fr));
memcpy (probs->mv.fr, h->delta_probabilities.mv.fr,
sizeof (h->delta_probabilities.mv.fr));
memcpy (probs->mv.class0_hp, h->delta_probabilities.mv.class0_hp,
sizeof (h->delta_probabilities.mv.class0_hp));
memcpy (probs->mv.hp, h->delta_probabilities.mv.hp,
sizeof (h->delta_probabilities.mv.hp));
}
static void
gst_v4l2_codecs_vp9_dec_fill_refs (GstV4l2CodecVp9Dec * self,
const GstVp9FrameHeader * h, const GstVp9Dpb * reference_frames)
{
GstVp9Picture *ref_pic;
if (reference_frames && reference_frames->pic_list[h->ref_frame_idx[0]]) {
ref_pic = reference_frames->pic_list[h->ref_frame_idx[0]];
self->v4l2_vp9_frame.last_frame_ts = ref_pic->system_frame_number * 1000;
}
if (reference_frames && reference_frames->pic_list[h->ref_frame_idx[1]]) {
ref_pic = reference_frames->pic_list[h->ref_frame_idx[1]];
self->v4l2_vp9_frame.golden_frame_ts = ref_pic->system_frame_number * 1000;
}
if (reference_frames && reference_frames->pic_list[h->ref_frame_idx[2]]) {
ref_pic = reference_frames->pic_list[h->ref_frame_idx[2]];
self->v4l2_vp9_frame.alt_frame_ts = ref_pic->system_frame_number * 1000;
}
}
static void
gst_v4l2_codec_vp9_dec_fill_dec_params (GstV4l2CodecVp9Dec * self,
const GstVp9FrameHeader * h, const GstVp9Dpb * reference_frames)
{
/* *INDENT-OFF* */
self->v4l2_vp9_frame = (struct v4l2_ctrl_vp9_frame) {
.flags =
(h->frame_type == GST_VP9_KEY_FRAME ? V4L2_VP9_FRAME_FLAG_KEY_FRAME : 0) |
(h->show_frame ? V4L2_VP9_FRAME_FLAG_SHOW_FRAME : 0) |
(h->error_resilient_mode ? V4L2_VP9_FRAME_FLAG_ERROR_RESILIENT : 0) |
(h->intra_only ? V4L2_VP9_FRAME_FLAG_INTRA_ONLY : 0) |
(h->allow_high_precision_mv ? V4L2_VP9_FRAME_FLAG_ALLOW_HIGH_PREC_MV : 0) |
(h->refresh_frame_context ? V4L2_VP9_FRAME_FLAG_REFRESH_FRAME_CTX : 0) |
(h->frame_parallel_decoding_mode ? V4L2_VP9_FRAME_FLAG_PARALLEL_DEC_MODE : 0) |
(self->subsampling_x ? V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING : 0) |
(self->subsampling_y ? V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING : 0) |
(self->color_range ? V4L2_VP9_FRAME_FLAG_COLOR_RANGE_FULL_SWING : 0),
.compressed_header_size = h->header_size_in_bytes,
.uncompressed_header_size = h->frame_header_length_in_bytes,
.profile = h->profile,
.frame_context_idx = h->frame_context_idx,
.bit_depth = self->bit_depth,
.interpolation_filter = h->interpolation_filter,
.tile_cols_log2 = h->tile_cols_log2,
.tile_rows_log2 = h->tile_rows_log2,
.reference_mode = h->reference_mode,
.frame_width_minus_1 = h->width - 1,
.frame_height_minus_1 = h->height - 1,
.render_width_minus_1 = h->render_width ? h->render_width - 1 : h->width - 1,
.render_height_minus_1 = h->render_height ? h->render_height - 1: h->height - 1,
.ref_frame_sign_bias =
(h->ref_frame_sign_bias[GST_VP9_REF_FRAME_LAST] ? V4L2_VP9_SIGN_BIAS_LAST : 0) |
(h->ref_frame_sign_bias[GST_VP9_REF_FRAME_GOLDEN] ? V4L2_VP9_SIGN_BIAS_GOLDEN : 0) |
(h->ref_frame_sign_bias[GST_VP9_REF_FRAME_ALTREF] ? V4L2_VP9_SIGN_BIAS_ALT : 0),
.lf = (struct v4l2_vp9_loop_filter) {
.flags =
(h->loop_filter_params.loop_filter_delta_enabled ? V4L2_VP9_LOOP_FILTER_FLAG_DELTA_ENABLED : 0) |
(h->loop_filter_params.loop_filter_delta_update ? V4L2_VP9_LOOP_FILTER_FLAG_DELTA_UPDATE : 0),
.level = h->loop_filter_params.loop_filter_level,
.sharpness = h->loop_filter_params.loop_filter_sharpness
},
.quant = (struct v4l2_vp9_quantization) {
.base_q_idx = h->quantization_params.base_q_idx, /* used for Y (luma) AC coefficients */
.delta_q_y_dc = h->quantization_params.delta_q_y_dc,
.delta_q_uv_dc = h->quantization_params.delta_q_uv_dc,
.delta_q_uv_ac = h->quantization_params.delta_q_uv_ac,
},
.seg = (struct v4l2_vp9_segmentation) {
.flags =
(h->segmentation_params.segmentation_enabled ? V4L2_VP9_SEGMENTATION_FLAG_ENABLED : 0) |
(h->segmentation_params.segmentation_update_map ? V4L2_VP9_SEGMENTATION_FLAG_UPDATE_MAP : 0) |
(h->segmentation_params.segmentation_temporal_update ? V4L2_VP9_SEGMENTATION_FLAG_TEMPORAL_UPDATE : 0) |
(h->segmentation_params.segmentation_update_data ? V4L2_VP9_SEGMENTATION_FLAG_UPDATE_DATA : 0) |
(h->segmentation_params.segmentation_abs_or_delta_update ? V4L2_VP9_SEGMENTATION_FLAG_ABS_OR_DELTA_UPDATE : 0),
}
};
/* *INDENT-ON* */
switch (h->reset_frame_context) {
case 0:
case 1:
self->v4l2_vp9_frame.reset_frame_context = V4L2_VP9_RESET_FRAME_CTX_NONE;
break;
case 2:
self->v4l2_vp9_frame.reset_frame_context = V4L2_VP9_RESET_FRAME_CTX_SPEC;
break;
case 3:
self->v4l2_vp9_frame.reset_frame_context = V4L2_VP9_RESET_FRAME_CTX_ALL;
break;
default:
break;
}
gst_v4l2_codecs_vp9_dec_fill_refs (self, h, reference_frames);
gst_v4l2_codec_vp9_dec_fill_lf_params (self, &h->loop_filter_params);
gst_v4l2_codec_vp9_dec_fill_seg_params (self, &h->segmentation_params);
}
static gboolean
gst_v4l2_codec_vp9_dec_open (GstVideoDecoder * decoder)
{
GstVp9Decoder *vp9dec = GST_VP9_DECODER (decoder);
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_DEC (decoder);
if (!gst_v4l2_decoder_open (self->decoder)) {
GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ_WRITE,
("Failed to open VP9 decoder"),
("gst_v4l2_decoder_open() failed: %s", g_strerror (errno)));
return FALSE;
}
/* V4L2 does not support non-keyframe resolution change, this will ask the
* base class to drop frame until the next keyframe as a workaround. */
gst_vp9_decoder_set_non_keyframe_format_change_support (vp9dec, FALSE);
return TRUE;
}
static gboolean
gst_v4l2_codec_vp9_dec_close (GstVideoDecoder * decoder)
{
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_DEC (decoder);
gst_v4l2_decoder_close (self->decoder);
return TRUE;
}
static void
gst_v4l2_codec_vp9_dec_reset_allocation (GstV4l2CodecVp9Dec * 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_vp9_dec_stop (GstVideoDecoder * decoder)
{
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_DEC (decoder);
gst_v4l2_decoder_streamoff (self->decoder, GST_PAD_SINK);
gst_v4l2_decoder_streamoff (self->decoder, GST_PAD_SRC);
gst_v4l2_codec_vp9_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 gboolean
gst_v4l2_codec_vp9_dec_negotiate (GstVideoDecoder * decoder)
{
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_DEC (decoder);
GstVp9Decoder *vp9dec = GST_VP9_DECODER (decoder);
/* *INDENT-OFF* */
struct v4l2_ext_control control[] = {
{
.id = V4L2_CID_STATELESS_VP9_FRAME,
.ptr = &self->v4l2_vp9_frame,
.size = sizeof (self->v4l2_vp9_frame),
},
};
/* *INDENT-ON* */
GstCaps *filter, *caps;
/* Ignore downstream renegotiation request. */
if (!self->need_negotiation)
return TRUE;
self->need_negotiation = FALSE;
GST_DEBUG_OBJECT (self, "Negotiate");
gst_v4l2_decoder_streamoff (self->decoder, GST_PAD_SINK);
gst_v4l2_decoder_streamoff (self->decoder, GST_PAD_SRC);
gst_v4l2_codec_vp9_dec_reset_allocation (self);
if (!gst_v4l2_decoder_set_sink_fmt (self->decoder, V4L2_PIX_FMT_VP9_FRAME,
self->width, self->height, self->bit_depth)) {
GST_ELEMENT_ERROR (self, CORE, NEGOTIATION,
("Failed to configure VP9 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;
}
filter = gst_v4l2_decoder_enum_src_formats (self->decoder);
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)) {
GST_ELEMENT_ERROR (self, CORE, NEGOTIATION,
("Unsupported pixel format"),
("No support for %ux%u format %s", self->width, self->height,
gst_video_format_to_string (GST_VIDEO_INFO_FORMAT (&self->vinfo))));
gst_caps_unref (caps);
return FALSE;
}
gst_caps_unref (caps);
if (self->output_state)
gst_video_codec_state_unref (self->output_state);
self->output_state =
gst_video_decoder_set_output_state (GST_VIDEO_DECODER (self),
self->vinfo.finfo->format, self->width,
self->height, vp9dec->input_state);
self->output_state->caps = gst_video_info_to_caps (&self->output_state->info);
if (GST_VIDEO_DECODER_CLASS (parent_class)->negotiate (decoder)) {
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;
}
return TRUE;
}
return FALSE;
}
static gboolean
gst_v4l2_codec_vp9_dec_decide_allocation (GstVideoDecoder * decoder,
GstQuery * query)
{
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_DEC (decoder);
guint min = 0;
guint num_bitstream;
self->has_videometa = gst_query_find_allocation_meta (query,
GST_VIDEO_META_API_TYPE, NULL);
g_clear_object (&self->src_pool);
g_clear_object (&self->src_allocator);
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);
num_bitstream = 1 +
MAX (1, gst_v4l2_decoder_get_render_delay (self->decoder));
self->sink_allocator = gst_v4l2_codec_allocator_new (self->decoder,
GST_PAD_SINK, num_bitstream);
if (!self->sink_allocator) {
GST_ELEMENT_ERROR (self, RESOURCE, NO_SPACE_LEFT,
("Not enough memory to allocate sink buffers."), (NULL));
return FALSE;
}
self->src_allocator = gst_v4l2_codec_allocator_new (self->decoder,
GST_PAD_SRC, GST_VP9_REF_FRAMES + min + 4);
if (!self->src_allocator) {
GST_ELEMENT_ERROR (self, RESOURCE, NO_SPACE_LEFT,
("Not enough memory to allocate source buffers."), (NULL));
g_clear_object (&self->sink_allocator);
return FALSE;
}
self->src_pool = gst_v4l2_codec_pool_new (self->src_allocator, &self->vinfo);
/* 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 GstFlowReturn
gst_v4l2_codec_vp9_dec_new_sequence (GstVp9Decoder * decoder,
const GstVp9FrameHeader * frame_hdr)
{
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_DEC (decoder);
gboolean negotiation_needed = FALSE;
if (self->vinfo.finfo->format == GST_VIDEO_FORMAT_UNKNOWN)
negotiation_needed = TRUE;
/* TODO Check if current buffers are large enough, and reuse them */
if (self->width != frame_hdr->width || self->height != frame_hdr->height) {
self->width = frame_hdr->width;
self->height = frame_hdr->height;
negotiation_needed = TRUE;
GST_INFO_OBJECT (self, "Resolution changed to %dx%d",
self->width, self->height);
}
if (self->subsampling_x != frame_hdr->subsampling_x ||
self->subsampling_y != frame_hdr->subsampling_y) {
GST_DEBUG_OBJECT (self,
"subsampling changed from x: %d, y: %d to x: %d, y: %d",
self->subsampling_x, self->subsampling_y,
frame_hdr->subsampling_x, frame_hdr->subsampling_y);
self->subsampling_x = frame_hdr->subsampling_x;
self->subsampling_y = frame_hdr->subsampling_y;
negotiation_needed = TRUE;
}
if (frame_hdr->color_space != GST_VP9_CS_UNKNOWN &&
frame_hdr->color_space != GST_VP9_CS_RESERVED_2 &&
frame_hdr->color_space != self->color_space) {
GST_DEBUG_OBJECT (self, "colorspace changed from %d to %d",
self->color_space, frame_hdr->color_space);
self->color_space = frame_hdr->color_space;
negotiation_needed = TRUE;
}
if (frame_hdr->color_range != self->color_range) {
GST_DEBUG_OBJECT (self, "color range changed from %d to %d",
self->color_range, frame_hdr->color_range);
self->color_range = frame_hdr->color_range;
negotiation_needed = TRUE;
}
if (frame_hdr->profile != GST_VP9_PROFILE_UNDEFINED &&
frame_hdr->profile != self->profile) {
GST_DEBUG_OBJECT (self, "profile changed from %d to %d", self->profile,
frame_hdr->profile);
self->profile = frame_hdr->profile;
negotiation_needed = TRUE;
}
if (frame_hdr->bit_depth != self->bit_depth) {
GST_DEBUG_OBJECT (self, "bit-depth changed from %d to %d",
self->bit_depth, frame_hdr->bit_depth);
self->bit_depth = frame_hdr->bit_depth;
negotiation_needed = TRUE;
}
gst_v4l2_codec_vp9_dec_fill_dec_params (self, frame_hdr, NULL);
gst_v4l2_codec_vp9_dec_fill_prob_updates (self, frame_hdr);
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_ERROR;
}
}
/* 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->width, self->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 GstFlowReturn
gst_v4l2_codec_vp9_dec_start_picture (GstVp9Decoder * decoder,
GstVp9Picture * picture)
{
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_DEC (decoder);
/* FIXME base class should not call us if negotiation failed */
if (!self->sink_allocator)
return GST_FLOW_ERROR;
/* Ensure we have a bitstream to write into */
if (!self->bitstream) {
self->bitstream = gst_v4l2_codec_allocator_alloc (self->sink_allocator);
if (!self->bitstream) {
GST_ELEMENT_ERROR (decoder, RESOURCE, NO_SPACE_LEFT,
("Not enough memory to decode VP9 stream."), (NULL));
return GST_FLOW_ERROR;
}
if (!gst_memory_map (self->bitstream, &self->bitstream_map, GST_MAP_WRITE)) {
GST_ELEMENT_ERROR (decoder, RESOURCE, WRITE,
("Could not access bitstream memory for writing"), (NULL));
g_clear_pointer (&self->bitstream, gst_memory_unref);
return GST_FLOW_ERROR;
}
}
/* We use this field to track how much we have written */
self->bitstream_map.size = 0;
return GST_FLOW_OK;
}
static void
gst_v4l2_codec_vp9_dec_reset_picture (GstV4l2CodecVp9Dec * 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;
}
}
static GstFlowReturn
gst_v4l2_codec_vp9_dec_decode_picture (GstVp9Decoder * decoder,
GstVp9Picture * picture, GstVp9Dpb * dpb)
{
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_DEC (decoder);
guint8 *bitstream_data = self->bitstream_map.data;
if (self->bitstream_map.maxsize < picture->size) {
GST_ELEMENT_ERROR (decoder, RESOURCE, NO_SPACE_LEFT,
("Not enough space to send picture bitstream."), (NULL));
gst_v4l2_codec_vp9_dec_reset_picture (self);
return GST_FLOW_ERROR;
}
gst_v4l2_codec_vp9_dec_fill_dec_params (self, &picture->frame_hdr, dpb);
if (decoder->parse_compressed_headers)
gst_v4l2_codec_vp9_dec_fill_prob_updates (self, &picture->frame_hdr);
memcpy (bitstream_data, picture->data, picture->size);
self->bitstream_map.size = picture->size;
return GST_FLOW_OK;
}
static GstFlowReturn
gst_v4l2_codec_vp9_dec_end_picture (GstVp9Decoder * decoder,
GstVp9Picture * picture)
{
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_DEC (decoder);
GstVideoCodecFrame *frame;
GstV4l2Request *request = NULL;
GstFlowReturn flow_ret;
gsize bytesused;
/* *INDENT-OFF* */
struct v4l2_ext_control decode_params_control[] = {
{
.id = V4L2_CID_STATELESS_VP9_FRAME,
.ptr = &self->v4l2_vp9_frame,
.size = sizeof(self->v4l2_vp9_frame),
},
{
.id = V4L2_CID_STATELESS_VP9_COMPRESSED_HDR,
.ptr = &self->v4l2_delta_probs,
.size = sizeof (self->v4l2_delta_probs),
},
};
/* *INDENT-ON* */
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);
frame = gst_video_decoder_get_frame (GST_VIDEO_DECODER (self),
picture->system_frame_number);
g_return_val_if_fail (frame, FALSE);
flow_ret = gst_buffer_pool_acquire_buffer (GST_BUFFER_POOL (self->src_pool),
&frame->output_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 (decoder, RESOURCE, WRITE,
("No more picture buffer available."), (NULL));
goto fail;
}
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 (decoder, RESOURCE, NO_SPACE_LEFT,
("Failed to allocate a media request object."), (NULL));
goto fail;
}
if (!gst_v4l2_decoder_set_controls (self->decoder, request,
decode_params_control, G_N_ELEMENTS (decode_params_control))) {
GST_ELEMENT_ERROR (decoder, RESOURCE, WRITE,
("Driver did not accept the bitstream parameters."), (NULL));
goto fail;
}
if (!gst_v4l2_request_queue (request, 0)) {
GST_ELEMENT_ERROR (decoder, RESOURCE, WRITE,
("Driver did not accept the decode request."), (NULL));
goto fail;
}
gst_vp9_picture_set_user_data (picture, request,
(GDestroyNotify) gst_v4l2_request_unref);
gst_v4l2_codec_vp9_dec_reset_picture (self);
return GST_FLOW_OK;
fail:
if (request)
gst_v4l2_request_unref (request);
gst_v4l2_codec_vp9_dec_reset_picture (self);
return GST_FLOW_ERROR;
}
static gboolean
gst_v4l2_codec_vp9_dec_copy_output_buffer (GstV4l2CodecVp9Dec * 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->width, self->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->width;
GST_VIDEO_INFO_HEIGHT (&src_frame.info) = self->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 GstVp9Picture *
gst_v4l2_codec_vp9_dec_duplicate_picture (GstVp9Decoder * decoder,
GstVideoCodecFrame * frame, GstVp9Picture * picture)
{
GstVp9Picture *new_picture;
GST_DEBUG_OBJECT (decoder, "Duplicate picture %u",
picture->system_frame_number);
new_picture = gst_vp9_picture_new ();
new_picture->frame_hdr = picture->frame_hdr;
new_picture->system_frame_number = frame->system_frame_number;
if (GST_MINI_OBJECT_FLAG_IS_SET (picture, FLAG_PICTURE_OUTPUTED)) {
GstBuffer *output_buffer = gst_vp9_picture_get_user_data (picture);
if (output_buffer)
frame->output_buffer = gst_buffer_ref (output_buffer);
} else {
GstV4l2Request *request = gst_vp9_picture_get_user_data (picture);
gst_vp9_picture_set_user_data (new_picture, gst_v4l2_request_ref (request),
(GDestroyNotify) gst_v4l2_request_unref);
frame->output_buffer = gst_v4l2_request_dup_pic_buf (request);
}
return new_picture;
}
static GstFlowReturn
gst_v4l2_codec_vp9_dec_output_picture (GstVp9Decoder * decoder,
GstVideoCodecFrame * frame, GstVp9Picture * picture)
{
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_DEC (decoder);
GstVideoDecoder *vdec = GST_VIDEO_DECODER (decoder);
GstV4l2Request *request = gst_vp9_picture_get_user_data (picture);
gint ret;
GST_DEBUG_OBJECT (self, "Output picture %u", picture->system_frame_number);
if (request) {
ret = gst_v4l2_request_set_done (request);
if (ret == 0) {
GST_ELEMENT_ERROR (self, STREAM, DECODE,
("Decoding frame took too long"), (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_vp9_picture_set_user_data (picture,
gst_buffer_ref (frame->output_buffer),
(GDestroyNotify) gst_buffer_unref);
GST_MINI_OBJECT_FLAG_SET (picture, FLAG_PICTURE_OUTPUTED);
}
/* This may happen if we duplicate a picture witch failed to decode */
if (!frame->output_buffer) {
GST_ELEMENT_ERROR (self, STREAM, DECODE,
("Failed to decode frame %u", picture->system_frame_number), (NULL));
goto error;
}
if (self->copy_frames)
gst_v4l2_codec_vp9_dec_copy_output_buffer (self, frame);
gst_vp9_picture_unref (picture);
return gst_video_decoder_finish_frame (vdec, frame);
error:
gst_video_decoder_drop_frame (vdec, frame);
gst_vp9_picture_unref (picture);
return GST_FLOW_ERROR;
}
static void
gst_v4l2_codec_vp9_dec_set_flushing (GstV4l2CodecVp9Dec * 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_vp9_dec_flush (GstVideoDecoder * decoder)
{
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_DEC (decoder);
GST_DEBUG_OBJECT (self, "Flushing decoder state.");
gst_v4l2_decoder_flush (self->decoder);
gst_v4l2_codec_vp9_dec_set_flushing (self, FALSE);
return GST_VIDEO_DECODER_CLASS (parent_class)->flush (decoder);
}
static gboolean
gst_v4l2_codec_vp9_dec_sink_event (GstVideoDecoder * decoder, GstEvent * event)
{
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_DEC (decoder);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
GST_DEBUG_OBJECT (self, "flush start");
gst_v4l2_codec_vp9_dec_set_flushing (self, TRUE);
break;
default:
break;
}
return GST_VIDEO_DECODER_CLASS (parent_class)->sink_event (decoder, event);
}
static GstStateChangeReturn
gst_v4l2_codec_vp9_dec_change_state (GstElement * element,
GstStateChange transition)
{
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_DEC (element);
if (transition == GST_STATE_CHANGE_PAUSED_TO_READY)
gst_v4l2_codec_vp9_dec_set_flushing (self, TRUE);
return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
}
static void
gst_v4l2_codec_vp9_dec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_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_vp9_dec_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_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_vp9_dec_init (GstV4l2CodecVp9Dec * self)
{
GstVp9Decoder *parent = GST_VP9_DECODER (self);
parent->parse_compressed_headers = TRUE;
}
static void
gst_v4l2_codec_vp9_dec_subinit (GstV4l2CodecVp9Dec * self,
GstV4l2CodecVp9DecClass * klass)
{
self->decoder = gst_v4l2_decoder_new (klass->device);
gst_video_info_init (&self->vinfo);
}
static void
gst_v4l2_codec_vp9_dec_dispose (GObject * object)
{
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_DEC (object);
g_clear_object (&self->decoder);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_v4l2_codec_vp9_dec_class_init (GstV4l2CodecVp9DecClass * klass)
{
}
static void
gst_v4l2_codec_vp9_dec_subclass_init (GstV4l2CodecVp9DecClass * 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);
GstVp9DecoderClass *vp9decoder_class = GST_VP9_DECODER_CLASS (klass);
gobject_class->set_property = gst_v4l2_codec_vp9_dec_set_property;
gobject_class->get_property = gst_v4l2_codec_vp9_dec_get_property;
gobject_class->dispose = gst_v4l2_codec_vp9_dec_dispose;
gst_element_class_set_static_metadata (element_class,
"V4L2 Stateless VP9 Video Decoder",
"Codec/Decoder/Video/Hardware",
"A V4L2 based VP9 video decoder",
"Daniel Almeida <daniel.almeida@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_vp9_dec_change_state);
decoder_class->open = GST_DEBUG_FUNCPTR (gst_v4l2_codec_vp9_dec_open);
decoder_class->close = GST_DEBUG_FUNCPTR (gst_v4l2_codec_vp9_dec_close);
decoder_class->stop = GST_DEBUG_FUNCPTR (gst_v4l2_codec_vp9_dec_stop);
decoder_class->negotiate =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_vp9_dec_negotiate);
decoder_class->decide_allocation =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_vp9_dec_decide_allocation);
decoder_class->flush = GST_DEBUG_FUNCPTR (gst_v4l2_codec_vp9_dec_flush);
decoder_class->sink_event =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_vp9_dec_sink_event);
vp9decoder_class->new_sequence =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_vp9_dec_new_sequence);
vp9decoder_class->start_picture =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_vp9_dec_start_picture);
vp9decoder_class->decode_picture =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_vp9_dec_decode_picture);
vp9decoder_class->end_picture =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_vp9_dec_end_picture);
vp9decoder_class->output_picture =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_vp9_dec_output_picture);
vp9decoder_class->duplicate_picture =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_vp9_dec_duplicate_picture);
vp9decoder_class->get_preferred_output_delay =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_vp9_dec_get_preferred_output_delay);
klass->device = device;
gst_v4l2_decoder_install_properties (gobject_class, PROP_LAST, device);
}
static void gst_v4l2_codec_vp9_alpha_decode_bin_subclass_init
(GstV4l2CodecAlphaDecodeBinClass * klass, gchar * decoder_name)
{
GstV4l2CodecAlphaDecodeBinClass *adbin_class =
(GstV4l2CodecAlphaDecodeBinClass *) klass;
GstElementClass *element_class = (GstElementClass *) klass;
adbin_class->decoder_name = decoder_name;
gst_element_class_add_static_pad_template (element_class, &alpha_template);
gst_element_class_set_static_metadata (element_class,
"VP9 Alpha Decoder", "Codec/Decoder/Video",
"Wrapper bin to decode VP9 with alpha stream.",
"Nicolas Dufresne <nicolas.dufresne@collabora.com>");
}
void
gst_v4l2_codec_vp9_dec_register (GstPlugin * plugin, GstV4l2Decoder * decoder,
GstV4l2CodecDevice * device, guint rank)
{
gchar *element_name;
GstCaps *src_caps, *alpha_caps;
GST_DEBUG_CATEGORY_INIT (v4l2_vp9dec_debug, "v4l2codecs-vp9dec", 0,
"V4L2 stateless VP9 decoder");
if (!gst_v4l2_decoder_set_sink_fmt (decoder, V4L2_PIX_FMT_VP9_FRAME,
320, 240, 8))
return;
src_caps = gst_v4l2_decoder_enum_src_formats (decoder);
if (gst_caps_is_empty (src_caps)) {
GST_WARNING ("Not registering VP9 decoder since it produces no "
"supported format");
goto done;
}
gst_v4l2_decoder_register (plugin, GST_TYPE_V4L2_CODEC_VP9_DEC,
(GClassInitFunc) gst_v4l2_codec_vp9_dec_subclass_init,
gst_mini_object_ref (GST_MINI_OBJECT (device)),
(GInstanceInitFunc) gst_v4l2_codec_vp9_dec_subinit,
"v4l2sl%svp9dec", device, rank, &element_name);
if (!element_name)
goto done;
alpha_caps = gst_caps_from_string ("video/x-raw,format={I420, NV12}");
if (gst_caps_can_intersect (src_caps, alpha_caps))
gst_v4l2_codec_alpha_decode_bin_register (plugin,
(GClassInitFunc) gst_v4l2_codec_vp9_alpha_decode_bin_subclass_init,
element_name, "v4l2slvp9%salphadecodebin", device, rank);
gst_caps_unref (alpha_caps);
done:
gst_caps_unref (src_caps);
}
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