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gstreamer/subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c
Nicolas Dufresne 7a9e11ae1b v4l2codecs: vp9: Fix duplicating a duplicated picture 
Duplicating a picture what was already a dup was leading to a crash. Rename
the custom picture flags as HOLDS_BUFFER to make its meaning clear. Then save
then ref and store the picture as userdata, so it can be obtained when
duplicating. Finally, mark the doplicated as HOLDS_BUFFER to avoid thinking it
holds a request.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1681>
2022-02-09 22:37:55 +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_HOLDS_BUFFER 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,
.reset_frame_context = h->reset_frame_context,
.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* */
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;
}
vp9dec->parse_compressed_headers =
gst_v4l2_decoder_query_control_size (self->decoder,
V4L2_CID_STATELESS_VP9_COMPRESSED_HDR, NULL);
/* 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);
if (decoder->parse_compressed_headers)
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);
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;
guint num_controls = 1;
/* *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),
},
{
/* V4L2_CID_STATELESS_VP9_COMPRESSED_HDR */
},
};
if (decoder->parse_compressed_headers) {
decode_params_control[num_controls++] = (struct v4l2_ext_control) {
.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, num_controls)) {
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_HOLDS_BUFFER)) {
GstBuffer *output_buffer = gst_vp9_picture_get_user_data (picture);
if (output_buffer) {
frame->output_buffer = gst_buffer_ref (output_buffer);
/* We need to also hold on the picture so it stays alive, but also to
* ensure we can duplicate it too. */
gst_vp9_picture_set_user_data (new_picture,
gst_buffer_ref (frame->output_buffer),
(GDestroyNotify) gst_buffer_unref);
}
/* Flag regardless if the buffer is null, so we don't start thinking it
* should hold a request unconditionally. */
GST_MINI_OBJECT_FLAG_SET (new_picture, FLAG_PICTURE_HOLDS_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 = NULL;
gint ret;
GST_DEBUG_OBJECT (self, "Output picture %u", picture->system_frame_number);
if (!GST_MINI_OBJECT_FLAG_IS_SET (picture, FLAG_PICTURE_HOLDS_BUFFER))
request = gst_vp9_picture_get_user_data (picture);
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_HOLDS_BUFFER);
}
/* 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)
{
}
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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