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gstreamer/sys/va/gstvah264dec.c

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/* GStreamer
* Copyright (C) 2020 Igalia, S.L.
* Author: Víctor Jáquez <vjaquez@igalia.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 the0
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-vah264dec
* @title: vah264dec
* @short_description: A VA-API based H264 video decoder
*
* vah264dec decodes H264 bitstreams to VA surfaces using the
* installed and chosen [VA-API](https://01.org/linuxmedia/vaapi)
* driver.
*
* The decoding surfaces can be mapped onto main memory as video
* frames.
*
* ## Example launch line
* ```
* gst-launch-1.0 filesrc location=big_buck_bunny.mov ! parsebin ! vah264dec ! autovideosink
* ```
*
* Since: 1.18
*
*/
/* ToDo:
*
* + interlaced streams
* + mutiview and stereo profiles
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstvah264dec.h"
#include <gst/codecs/gsth264decoder.h>
#include <va/va_drmcommon.h>
#include "gstvaallocator.h"
#include "gstvacaps.h"
#include "gstvadecoder.h"
#include "gstvadevice.h"
#include "gstvadisplay_drm.h"
#include "gstvapool.h"
#include "gstvaprofile.h"
#include "gstvautils.h"
#include "gstvavideoformat.h"
GST_DEBUG_CATEGORY_STATIC (gst_va_h264dec_debug);
#define GST_CAT_DEFAULT gst_va_h264dec_debug
#define GST_VA_H264_DEC(obj) ((GstVaH264Dec *) obj)
#define GST_VA_H264_DEC_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), G_TYPE_FROM_INSTANCE (obj), GstVaH264DecClass))
#define GST_VA_H264_DEC_CLASS(klass) ((GstVaH264DecClass *) klass)
typedef struct _GstVaH264Dec GstVaH264Dec;
typedef struct _GstVaH264DecClass GstVaH264DecClass;
struct _GstVaH264DecClass
{
GstH264DecoderClass parent_class;
gchar *render_device_path;
};
struct _GstVaH264Dec
{
GstH264Decoder parent;
GstVaDisplay *display;
GstVaDecoder *decoder;
GstBufferPool *other_pool;
GstFlowReturn last_ret;
GstVideoCodecState *output_state;
VAProfile profile;
gint display_width;
gint display_height;
gint coded_width;
gint coded_height;
guint rt_format;
gint dpb_size;
gboolean need_negotiation;
gboolean need_cropping;
gboolean has_videometa;
gboolean copy_frames;
};
static GstElementClass *parent_class = NULL;
struct CData
{
gchar *render_device_path;
gchar *description;
GstCaps *sink_caps;
GstCaps *src_caps;
};
/* *INDENT-OFF* */
static const gchar *src_caps_str = GST_VIDEO_CAPS_MAKE_WITH_FEATURES ("memory:VAMemory",
"{ NV12, P010_10LE }") " ;" GST_VIDEO_CAPS_MAKE ("{ NV12, P010_10LE }");
/* *INDENT-ON* */
static const gchar *sink_caps_str = "video/x-h264";
static gboolean
gst_va_h264_dec_end_picture (GstH264Decoder * decoder, GstH264Picture * picture)
{
GstVaH264Dec *self = GST_VA_H264_DEC (decoder);
GstVaDecodePicture *va_pic;
GST_LOG_OBJECT (self, "end picture %p, (poc %d)",
picture, picture->pic_order_cnt);
va_pic = gst_h264_picture_get_user_data (picture);
return gst_va_decoder_decode (self->decoder, va_pic);
}
static gboolean
_copy_output_buffer (GstVaH264Dec * self, GstVideoCodecFrame * codec_frame)
{
GstVideoFrame src_frame;
GstVideoFrame dest_frame;
GstVideoInfo dest_vinfo;
GstBuffer *buffer;
GstFlowReturn ret;
if (!self->other_pool)
return FALSE;
if (!gst_buffer_pool_set_active (self->other_pool, TRUE))
return FALSE;
gst_video_info_set_format (&dest_vinfo,
GST_VIDEO_INFO_FORMAT (&self->output_state->info), self->display_width,
self->display_height);
ret = gst_buffer_pool_acquire_buffer (self->other_pool, &buffer, NULL);
if (ret != GST_FLOW_OK)
goto fail;
if (!gst_video_frame_map (&src_frame, &self->output_state->info,
codec_frame->output_buffer, GST_MAP_READ))
goto fail;
if (!gst_video_frame_map (&dest_frame, &dest_vinfo, buffer, GST_MAP_WRITE)) {
gst_video_frame_unmap (&dest_frame);
goto fail;
}
/* gst_video_frame_copy can crop this, but does not know, so let
* make it think it's all right */
GST_VIDEO_INFO_WIDTH (&src_frame.info) = self->display_width;
GST_VIDEO_INFO_HEIGHT (&src_frame.info) = self->display_height;
if (!gst_video_frame_copy (&dest_frame, &src_frame)) {
gst_video_frame_unmap (&src_frame);
gst_video_frame_unmap (&dest_frame);
goto fail;
}
gst_video_frame_unmap (&src_frame);
gst_video_frame_unmap (&dest_frame);
gst_buffer_replace (&codec_frame->output_buffer, buffer);
gst_buffer_unref (buffer);
return TRUE;
fail:
GST_ERROR_OBJECT (self, "Failed copy output buffer.");
return FALSE;
}
static GstFlowReturn
gst_va_h264_dec_output_picture (GstH264Decoder * decoder,
GstVideoCodecFrame * frame, GstH264Picture * picture)
{
GstVaH264Dec *self = GST_VA_H264_DEC (decoder);
GST_LOG_OBJECT (self,
"Outputting picture %p (poc %d)", picture, picture->pic_order_cnt);
if (self->last_ret != GST_FLOW_OK) {
gst_h264_picture_unref (picture);
gst_video_decoder_drop_frame (GST_VIDEO_DECODER (self), frame);
return self->last_ret;
}
if (self->copy_frames)
_copy_output_buffer (self, frame);
gst_h264_picture_unref (picture);
return gst_video_decoder_finish_frame (GST_VIDEO_DECODER (self), frame);
}
static void
_init_vaapi_pic (VAPictureH264 * va_picture)
{
va_picture->picture_id = VA_INVALID_ID;
va_picture->frame_idx = 0;
va_picture->flags = VA_PICTURE_H264_INVALID;
va_picture->TopFieldOrderCnt = 0;
va_picture->BottomFieldOrderCnt = 0;
}
static void
_fill_vaapi_pic (VAPictureH264 * va_picture, GstH264Picture * picture)
{
GstVaDecodePicture *va_pic;
va_pic = gst_h264_picture_get_user_data (picture);
if (!va_pic) {
_init_vaapi_pic (va_picture);
return;
}
va_picture->picture_id = gst_va_decode_picture_get_surface (va_pic);
va_picture->flags = 0;
if (picture->ref && picture->long_term) {
va_picture->flags |= VA_PICTURE_H264_LONG_TERM_REFERENCE;
va_picture->frame_idx = picture->long_term_frame_idx;
} else {
if (picture->ref)
va_picture->flags |= VA_PICTURE_H264_SHORT_TERM_REFERENCE;
va_picture->frame_idx = picture->frame_num;
}
switch (picture->field) {
case GST_H264_PICTURE_FIELD_FRAME:
va_picture->TopFieldOrderCnt = picture->top_field_order_cnt;
va_picture->BottomFieldOrderCnt = picture->bottom_field_order_cnt;
break;
case GST_H264_PICTURE_FIELD_TOP_FIELD:
va_picture->flags |= VA_PICTURE_H264_TOP_FIELD;
va_picture->TopFieldOrderCnt = picture->top_field_order_cnt;
va_picture->BottomFieldOrderCnt = 0;
break;
case GST_H264_PICTURE_FIELD_BOTTOM_FIELD:
va_picture->flags |= VA_PICTURE_H264_BOTTOM_FIELD;
va_picture->TopFieldOrderCnt = 0;
va_picture->BottomFieldOrderCnt = picture->bottom_field_order_cnt;
break;
default:
va_picture->TopFieldOrderCnt = 0;
va_picture->BottomFieldOrderCnt = 0;
break;
}
}
/* fill the VA API reference picture lists from the GstCodec reference
* picture list */
static void
_fill_ref_pic_list (VAPictureH264 va_reflist[32], GArray * reflist)
{
guint i;
for (i = 0; i < reflist->len; i++) {
GstH264Picture *picture = g_array_index (reflist, GstH264Picture *, i);
_fill_vaapi_pic (&va_reflist[i], picture);
}
for (; i < 32; i++)
_init_vaapi_pic (&va_reflist[i]);
}
static void
_fill_pred_weight_table (GstH264SliceHdr * header,
VASliceParameterBufferH264 * slice_param)
{
GstH264PPS *pps;
GstH264SPS *sps;
guint num_weight_tables = 0;
gint i, j;
pps = header->pps;
sps = pps->sequence;
if (pps->weighted_pred_flag
&& (GST_H264_IS_P_SLICE (header) || GST_H264_IS_SP_SLICE (header)))
num_weight_tables = 1;
else if (pps->weighted_bipred_idc == 1 && GST_H264_IS_B_SLICE (header))
num_weight_tables = 2;
if (num_weight_tables == 0)
return;
slice_param->luma_log2_weight_denom =
header->pred_weight_table.luma_log2_weight_denom;
slice_param->chroma_log2_weight_denom =
header->pred_weight_table.chroma_log2_weight_denom;
/* VA API also wants the inferred (default) values, not only what is
* available in the bitstream (7.4.3.2). */
slice_param->luma_weight_l0_flag = 1;
for (i = 0; i <= slice_param->num_ref_idx_l0_active_minus1; i++) {
slice_param->luma_weight_l0[i] =
header->pred_weight_table.luma_weight_l0[i];
slice_param->luma_offset_l0[i] =
header->pred_weight_table.luma_offset_l0[i];
}
slice_param->chroma_weight_l0_flag = sps->chroma_array_type != 0;
if (slice_param->chroma_weight_l0_flag) {
for (i = 0; i <= slice_param->num_ref_idx_l0_active_minus1; i++) {
for (j = 0; j < 2; j++) {
slice_param->chroma_weight_l0[i][j] =
header->pred_weight_table.chroma_weight_l0[i][j];
slice_param->chroma_offset_l0[i][j] =
header->pred_weight_table.chroma_offset_l0[i][j];
}
}
}
if (num_weight_tables == 1)
return;
slice_param->luma_weight_l1_flag = 1;
for (i = 0; i <= slice_param->num_ref_idx_l1_active_minus1; i++) {
slice_param->luma_weight_l1[i] =
header->pred_weight_table.luma_weight_l1[i];
slice_param->luma_offset_l1[i] =
header->pred_weight_table.luma_offset_l1[i];
}
slice_param->chroma_weight_l1_flag = sps->chroma_array_type != 0;
if (slice_param->chroma_weight_l1_flag) {
for (i = 0; i <= slice_param->num_ref_idx_l1_active_minus1; i++) {
for (j = 0; j < 2; j++) {
slice_param->chroma_weight_l1[i][j] =
header->pred_weight_table.chroma_weight_l1[i][j];
slice_param->chroma_offset_l1[i][j] =
header->pred_weight_table.chroma_offset_l1[i][j];
}
}
}
}
static inline guint
_get_slice_data_bit_offset (GstH264SliceHdr * header, guint nal_header_bytes)
{
guint epb_count;
epb_count = header->n_emulation_prevention_bytes;
return 8 * nal_header_bytes + header->header_size - epb_count * 8;
}
static gboolean
gst_va_h264_dec_decode_slice (GstH264Decoder * decoder,
GstH264Picture * picture, GstH264Slice * slice, GArray * ref_pic_list0,
GArray * ref_pic_list1)
{
GstH264SliceHdr *header = &slice->header;
GstH264NalUnit *nalu = &slice->nalu;
GstVaDecodePicture *va_pic;
GstVaH264Dec *self = GST_VA_H264_DEC (decoder);
VASliceParameterBufferH264 slice_param;
gboolean ret;
GST_TRACE_OBJECT (self, "-");
/* *INDENT-OFF* */
slice_param = (VASliceParameterBufferH264) {
.slice_data_size = nalu->size,
.slice_data_offset = 0,
.slice_data_flag = VA_SLICE_DATA_FLAG_ALL,
.slice_data_bit_offset =
_get_slice_data_bit_offset (header, nalu->header_bytes),
.first_mb_in_slice = header->first_mb_in_slice,
.slice_type = header->type % 5,
.direct_spatial_mv_pred_flag = header->direct_spatial_mv_pred_flag,
.cabac_init_idc = header->cabac_init_idc,
.slice_qp_delta = header->slice_qp_delta,
.disable_deblocking_filter_idc = header->disable_deblocking_filter_idc,
.slice_alpha_c0_offset_div2 = header->slice_alpha_c0_offset_div2,
.slice_beta_offset_div2 = header->slice_beta_offset_div2,
.num_ref_idx_l0_active_minus1 = header->num_ref_idx_l0_active_minus1,
.num_ref_idx_l1_active_minus1 = header->num_ref_idx_l1_active_minus1,
};
/* *INDENT-ON* */
_fill_ref_pic_list (slice_param.RefPicList0, ref_pic_list0);
_fill_ref_pic_list (slice_param.RefPicList1, ref_pic_list1);
_fill_pred_weight_table (header, &slice_param);
va_pic = gst_h264_picture_get_user_data (picture);
ret = gst_va_decoder_add_slice_buffer (self->decoder, va_pic, &slice_param,
sizeof (slice_param), slice->nalu.data + slice->nalu.offset,
slice->nalu.size);
if (!ret) {
gst_va_decoder_destroy_buffers (self->decoder, va_pic);
return FALSE;
}
return TRUE;
}
static gboolean
gst_va_h264_dec_start_picture (GstH264Decoder * decoder,
GstH264Picture * picture, GstH264Slice * slice, GstH264Dpb * dpb)
{
GstH264PPS *pps;
GstH264SPS *sps;
GstVaH264Dec *self = GST_VA_H264_DEC (decoder);
GstVaDecodePicture *va_pic;
VAIQMatrixBufferH264 iq_matrix = { 0, };
VAPictureParameterBufferH264 pic_param;
guint i, n;
GST_TRACE_OBJECT (self, "-");
va_pic = gst_h264_picture_get_user_data (picture);
pps = slice->header.pps;
sps = pps->sequence;
/* *INDENT-OFF* */
pic_param = (VAPictureParameterBufferH264) {
/* .CurrPic */
/* .ReferenceFrames */
.picture_width_in_mbs_minus1 = sps->pic_width_in_mbs_minus1,
.picture_height_in_mbs_minus1 =
sps->pic_height_in_map_units_minus1 << !sps->frame_mbs_only_flag,
.bit_depth_luma_minus8 = sps->bit_depth_luma_minus8,
.bit_depth_chroma_minus8 = sps->bit_depth_chroma_minus8,
.num_ref_frames = sps->num_ref_frames,
.seq_fields.bits = {
.chroma_format_idc = sps->chroma_format_idc,
.residual_colour_transform_flag = sps->separate_colour_plane_flag,
.gaps_in_frame_num_value_allowed_flag =
sps->gaps_in_frame_num_value_allowed_flag,
.frame_mbs_only_flag = sps->frame_mbs_only_flag,
.mb_adaptive_frame_field_flag = sps->mb_adaptive_frame_field_flag,
.direct_8x8_inference_flag = sps->direct_8x8_inference_flag,
.MinLumaBiPredSize8x8 = sps->level_idc >= 31, /* A.3.3.2 */
.log2_max_frame_num_minus4 = sps->log2_max_frame_num_minus4,
.pic_order_cnt_type = sps->pic_order_cnt_type,
.log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_pic_order_cnt_lsb_minus4,
.delta_pic_order_always_zero_flag = sps->delta_pic_order_always_zero_flag,
},
.pic_init_qp_minus26 = pps->pic_init_qp_minus26,
.pic_init_qs_minus26 = pps->pic_init_qs_minus26,
.chroma_qp_index_offset = pps->chroma_qp_index_offset,
.second_chroma_qp_index_offset = pps->second_chroma_qp_index_offset,
.pic_fields.bits = {
.entropy_coding_mode_flag = pps->entropy_coding_mode_flag,
.weighted_pred_flag = pps->weighted_pred_flag,
.weighted_bipred_idc = pps->weighted_bipred_idc,
.transform_8x8_mode_flag = pps->transform_8x8_mode_flag,
.field_pic_flag = slice->header.field_pic_flag,
.constrained_intra_pred_flag = pps->constrained_intra_pred_flag,
.pic_order_present_flag = pps->pic_order_present_flag,
.deblocking_filter_control_present_flag =
pps->deblocking_filter_control_present_flag,
.redundant_pic_cnt_present_flag = pps->redundant_pic_cnt_present_flag,
.reference_pic_flag = picture->nal_ref_idc != 0,
},
.frame_num = slice->header.frame_num,
};
/* *INDENT-ON* */
_fill_vaapi_pic (&pic_param.CurrPic, picture);
/* reference frames */
{
GArray *ref_list = g_array_sized_new (FALSE, FALSE,
sizeof (GstH264Picture *), 16);
g_array_set_clear_func (ref_list, (GDestroyNotify) gst_h264_picture_clear);
gst_h264_dpb_get_pictures_short_term_ref (dpb, ref_list);
for (i = 0; i < 16 && i < ref_list->len; i++) {
GstH264Picture *pic = g_array_index (ref_list, GstH264Picture *, i);
_fill_vaapi_pic (&pic_param.ReferenceFrames[i], pic);
}
g_array_set_size (ref_list, 0);
gst_h264_dpb_get_pictures_long_term_ref (dpb, ref_list);
for (; i < 16 && i < ref_list->len; i++) {
GstH264Picture *pic = g_array_index (ref_list, GstH264Picture *, i);
_fill_vaapi_pic (&pic_param.ReferenceFrames[i], pic);
}
g_array_unref (ref_list);
for (; i < 16; i++)
_init_vaapi_pic (&pic_param.ReferenceFrames[i]);
}
if (!gst_va_decoder_add_param_buffer (self->decoder, va_pic,
VAPictureParameterBufferType, &pic_param, sizeof (pic_param)))
goto fail;
/* there are always 6 4x4 scaling lists */
for (i = 0; i < 6; i++) {
gst_h264_quant_matrix_4x4_get_raster_from_zigzag (iq_matrix.ScalingList4x4
[i], pps->scaling_lists_4x4[i]);
}
/* We need the first 2 entries (Y intra and Y inter for YCbCr 4:2:2 and
* less, and the full 6 entries for 4:4:4, see Table 7-2 of the spec for
* more details */
n = (pps->sequence->chroma_format_idc == 3) ? 6 : 2;
for (i = 0; i < n; i++) {
gst_h264_quant_matrix_8x8_get_raster_from_zigzag (iq_matrix.ScalingList8x8
[i], pps->scaling_lists_8x8[i]);
}
if (!gst_va_decoder_add_param_buffer (self->decoder, va_pic,
VAIQMatrixBufferType, &iq_matrix, sizeof (iq_matrix)))
goto fail;
return TRUE;
fail:
{
gst_va_decoder_destroy_buffers (self->decoder, va_pic);
return FALSE;
}
}
static gboolean
gst_va_h264_dec_new_picture (GstH264Decoder * decoder,
GstVideoCodecFrame * frame, GstH264Picture * picture)
{
GstVaH264Dec *self = GST_VA_H264_DEC (decoder);
GstVaDecodePicture *pic;
GstVideoDecoder *vdec = GST_VIDEO_DECODER (decoder);
self->last_ret = gst_video_decoder_allocate_output_frame (vdec, frame);
if (self->last_ret != GST_FLOW_OK)
goto error;
pic = gst_va_decode_picture_new (frame->output_buffer);
gst_h264_picture_set_user_data (picture, pic,
(GDestroyNotify) gst_va_decode_picture_free);
GST_LOG_OBJECT (self, "New va decode picture %p - %#x", pic,
gst_va_decode_picture_get_surface (pic));
return TRUE;
error:
{
GST_WARNING_OBJECT (self,
"Failed to allocated output buffer, return %s",
gst_flow_get_name (self->last_ret));
return FALSE;
}
}
static inline guint
_get_num_views (const GstH264SPS * sps)
{
return 1 + (sps->extension_type == GST_H264_NAL_EXTENSION_MVC ?
sps->extension.mvc.num_views_minus1 : 0);
}
static guint
_get_rtformat (GstVaH264Dec * self, guint8 bit_depth_luma,
guint8 chroma_format_idc)
{
switch (bit_depth_luma) {
case 10:
if (chroma_format_idc == 3)
return VA_RT_FORMAT_YUV444_10;
if (chroma_format_idc == 2)
return VA_RT_FORMAT_YUV422_10;
else
return VA_RT_FORMAT_YUV420_10;
break;
case 8:
if (chroma_format_idc == 3)
return VA_RT_FORMAT_YUV444;
if (chroma_format_idc == 2)
return VA_RT_FORMAT_YUV422;
else
return VA_RT_FORMAT_YUV420;
break;
default:
GST_ERROR_OBJECT (self, "Unsupported chroma format: %d "
"(with depth luma: %d)", chroma_format_idc, bit_depth_luma);
return 0;
}
}
/* *INDENT-OFF* */
static const struct
{
GstH264Profile profile_idc;
VAProfile va_profile;
} profile_map[] = {
#define P(idc, va) { G_PASTE (GST_H264_PROFILE_, idc), G_PASTE (VAProfileH264, va) }
/* P (BASELINE, ), */
P (MAIN, Main),
/* P (EXTENDED, ), */
P (HIGH, High),
/* P (HIGH10, ), */
/* P (HIGH_422, ), */
/* P (HIGH_444, ), */
P (MULTIVIEW_HIGH, MultiviewHigh),
P (STEREO_HIGH, StereoHigh),
/* P (SCALABLE_BASELINE, ), */
/* P (SCALABLE_HIGH, ), */
#undef P
};
/* *INDENT-ON* */
static VAProfile
_get_profile (GstVaH264Dec * self, const GstH264SPS * sps, gint max_dpb_size)
{
VAProfile profiles[4];
gint i = 0, j;
for (j = 0; j < G_N_ELEMENTS (profile_map); j++) {
if (profile_map[j].profile_idc == sps->profile_idc) {
profiles[i++] = profile_map[j].va_profile;
break;
}
}
switch (sps->profile_idc) {
case GST_H264_PROFILE_BASELINE:
if (sps->constraint_set1_flag) { /* A.2.2 (main profile) */
profiles[i++] = VAProfileH264ConstrainedBaseline;
profiles[i++] = VAProfileH264Main;
}
break;
case GST_H264_PROFILE_EXTENDED:
if (sps->constraint_set1_flag) { /* A.2.2 (main profile) */
profiles[i++] = VAProfileH264Main;
}
break;
case GST_H264_PROFILE_MULTIVIEW_HIGH:
if (_get_num_views (sps) == 2) {
profiles[i++] = VAProfileH264StereoHigh;
}
if (max_dpb_size <= 16 /* && i965 driver */ ) {
profiles[i++] = VAProfileH264MultiviewHigh;
}
default:
break;
}
for (j = 0; j < i && j < G_N_ELEMENTS (profiles); j++) {
if (gst_va_decoder_has_profile (self->decoder, profiles[j]))
return profiles[j];
}
GST_ERROR_OBJECT (self, "Unsupported profile: %d", sps->profile_idc);
return VAProfileNone;
}
static gboolean
gst_va_h264_dec_new_sequence (GstH264Decoder * decoder, const GstH264SPS * sps,
gint max_dpb_size)
{
GstVaH264Dec *self = GST_VA_H264_DEC (decoder);
VAProfile profile;
gint display_width;
gint display_height;
guint rt_format;
gboolean negotiation_needed = FALSE;
if (self->dpb_size < max_dpb_size)
self->dpb_size = max_dpb_size;
if (sps->frame_cropping_flag) {
display_width = sps->crop_rect_width;
display_height = sps->crop_rect_height;
} else {
display_width = sps->width;
display_height = sps->height;
}
profile = _get_profile (self, sps, max_dpb_size);
if (profile == VAProfileNone)
return FALSE;
rt_format = _get_rtformat (self, sps->bit_depth_luma_minus8 + 8,
sps->chroma_format_idc);
if (rt_format == 0)
return FALSE;
if (gst_va_decoder_format_changed (self->decoder, profile,
rt_format, sps->width, sps->height)) {
self->profile = profile;
self->rt_format = rt_format;
self->coded_width = sps->width;
self->coded_height = sps->height;
negotiation_needed = TRUE;
GST_INFO_OBJECT (self, "Format changed to %s [%x] (%dx%d)",
gst_va_profile_name (profile), rt_format, self->coded_width,
self->coded_height);
}
if (self->display_width != display_width
|| self->display_height != display_height) {
self->display_width = display_width;
self->display_height = display_height;
negotiation_needed = TRUE;
GST_INFO_OBJECT (self, "Resolution changed to %dx%d", self->display_width,
self->display_height);
}
self->need_cropping = self->display_width < self->coded_width
|| self->display_height < self->coded_height;
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 FALSE;
}
}
return TRUE;
}
static gboolean
gst_va_h264_dec_open (GstVideoDecoder * decoder)
{
GstVaH264Dec *self = GST_VA_H264_DEC (decoder);
GstVaH264DecClass *klass = GST_VA_H264_DEC_GET_CLASS (decoder);
if (!gst_va_ensure_element_data (decoder, klass->render_device_path,
&self->display))
return FALSE;
if (!self->decoder)
self->decoder = gst_va_decoder_new (self->display, H264);
return (self->decoder != NULL);
}
static gboolean
gst_va_h264_dec_close (GstVideoDecoder * decoder)
{
GstVaH264Dec *self = GST_VA_H264_DEC (decoder);
gst_clear_object (&self->decoder);
gst_clear_object (&self->display);
return TRUE;
}
static GstCaps *
_complete_sink_caps (GstCaps * sinkcaps)
{
GstCaps *caps = gst_caps_copy (sinkcaps);
GValue val = G_VALUE_INIT;
const gchar *streamformat[] = { "avc", "avc3", "byte-stream" };
gint i;
g_value_init (&val, G_TYPE_STRING);
g_value_set_string (&val, "au");
gst_caps_set_value (caps, "alignment", &val);
g_value_unset (&val);
gst_value_list_init (&val, G_N_ELEMENTS (streamformat));
for (i = 0; i < G_N_ELEMENTS (streamformat); i++) {
GValue v = G_VALUE_INIT;
g_value_init (&v, G_TYPE_STRING);
g_value_set_string (&v, streamformat[i]);
gst_value_list_append_value (&val, &v);
g_value_unset (&v);
}
gst_caps_set_value (caps, "stream-format", &val);
g_value_unset (&val);
return caps;
}
static GstCaps *
gst_va_h264_dec_sink_getcaps (GstVideoDecoder * decoder, GstCaps * filter)
{
GstCaps *sinkcaps, *caps = NULL, *tmp;
GstVaH264Dec *self = GST_VA_H264_DEC (decoder);
if (self->decoder)
caps = gst_va_decoder_get_sinkpad_caps (self->decoder);
if (caps) {
sinkcaps = _complete_sink_caps (caps);
gst_caps_unref (caps);
if (filter) {
tmp = gst_caps_intersect_full (filter, sinkcaps,
GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (sinkcaps);
caps = tmp;
} else {
caps = sinkcaps;
}
GST_LOG_OBJECT (self, "Returning caps %" GST_PTR_FORMAT, caps);
} else if (!caps) {
caps = gst_video_decoder_proxy_getcaps (decoder, NULL, filter);
}
return caps;
}
static gboolean
gst_va_h264_dec_src_query (GstVideoDecoder * decoder, GstQuery * query)
{
GstVaH264Dec *self = GST_VA_H264_DEC (decoder);
gboolean ret = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CONTEXT:{
return gst_va_handle_context_query (GST_ELEMENT_CAST (self), query,
self->display);
}
case GST_QUERY_CAPS:{
GstCaps *caps = NULL, *tmp, *filter = NULL;
gboolean fixed_caps;
gst_query_parse_caps (query, &filter);
fixed_caps = GST_PAD_IS_FIXED_CAPS (GST_VIDEO_DECODER_SRC_PAD (decoder));
if (!fixed_caps && self->decoder)
caps = gst_va_decoder_get_srcpad_caps (self->decoder);
if (caps) {
if (filter) {
tmp =
gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (caps);
caps = tmp;
}
GST_LOG_OBJECT (self, "Returning caps %" GST_PTR_FORMAT, caps);
gst_query_set_caps_result (query, caps);
gst_caps_unref (caps);
ret = TRUE;
break;
}
/* else jump to default */
}
default:
ret = GST_VIDEO_DECODER_CLASS (parent_class)->src_query (decoder, query);
break;
}
return ret;
}
static gboolean
gst_va_h264_dec_sink_query (GstVideoDecoder * decoder, GstQuery * query)
{
GstVaH264Dec *self = GST_VA_H264_DEC (decoder);
if (GST_QUERY_TYPE (query) == GST_QUERY_CONTEXT) {
return gst_va_handle_context_query (GST_ELEMENT_CAST (self), query,
self->display);
}
return GST_VIDEO_DECODER_CLASS (parent_class)->sink_query (decoder, query);
}
static gboolean
gst_va_h264_dec_stop (GstVideoDecoder * decoder)
{
GstVaH264Dec *self = GST_VA_H264_DEC (decoder);
if (!gst_va_decoder_close (self->decoder))
return FALSE;
if (self->output_state)
gst_video_codec_state_unref (self->output_state);
self->output_state = NULL;
if (self->other_pool)
gst_buffer_pool_set_active (self->other_pool, FALSE);
gst_clear_object (&self->other_pool);
return GST_VIDEO_DECODER_CLASS (parent_class)->stop (decoder);
}
static GstVideoFormat
_default_video_format_from_chroma (guint chroma_type)
{
switch (chroma_type) {
case VA_RT_FORMAT_YUV420:
case VA_RT_FORMAT_YUV422:
case VA_RT_FORMAT_YUV444:
return GST_VIDEO_FORMAT_NV12;
case VA_RT_FORMAT_YUV420_10:
case VA_RT_FORMAT_YUV422_10:
case VA_RT_FORMAT_YUV444_10:
return GST_VIDEO_FORMAT_P010_10LE;
default:
return GST_VIDEO_FORMAT_UNKNOWN;
}
}
static void
_get_preferred_format_and_caps_features (GstVaH264Dec * self,
GstVideoFormat * format, GstCapsFeatures ** capsfeatures)
{
GstCaps *peer_caps, *preferred_caps = NULL;
GstCapsFeatures *features;
GstStructure *structure;
const GValue *v_format;
guint num_structures, i;
peer_caps = gst_pad_get_allowed_caps (GST_VIDEO_DECODER_SRC_PAD (self));
GST_DEBUG_OBJECT (self, "Allowed caps %" GST_PTR_FORMAT, peer_caps);
/* prefer memory:VASurface over other caps features */
num_structures = gst_caps_get_size (peer_caps);
for (i = 0; i < num_structures; i++) {
features = gst_caps_get_features (peer_caps, i);
structure = gst_caps_get_structure (peer_caps, i);
if (gst_caps_features_is_any (features))
continue;
if (gst_caps_features_contains (features, "memory:VAMemory")) {
preferred_caps = gst_caps_new_full (gst_structure_copy (structure), NULL);
gst_caps_set_features_simple (preferred_caps,
gst_caps_features_copy (features));
break;
}
}
if (!preferred_caps)
preferred_caps = peer_caps;
else
gst_clear_caps (&peer_caps);
if (gst_caps_is_empty (preferred_caps)
|| gst_caps_is_any (preferred_caps)) {
/* if any or not linked yet then system memory and nv12 */
if (capsfeatures)
*capsfeatures = NULL;
if (format)
*format = _default_video_format_from_chroma (self->rt_format);
goto bail;
}
features = gst_caps_get_features (preferred_caps, 0);
if (features && capsfeatures)
*capsfeatures = gst_caps_features_copy (features);
if (!format)
goto bail;
structure = gst_caps_get_structure (preferred_caps, 0);
v_format = gst_structure_get_value (structure, "format");
if (!v_format)
*format = _default_video_format_from_chroma (self->rt_format);
else if (G_VALUE_HOLDS_STRING (v_format))
*format = gst_video_format_from_string (g_value_get_string (v_format));
else if (GST_VALUE_HOLDS_LIST (v_format)) {
guint num_values = gst_value_list_get_size (v_format);
for (i = 0; i < num_values; i++) {
GstVideoFormat fmt;
const GValue *v_fmt = gst_value_list_get_value (v_format, i);
if (!v_fmt)
continue;
fmt = gst_video_format_from_string (g_value_get_string (v_fmt));
if (gst_va_chroma_from_video_format (fmt) == self->rt_format) {
*format = fmt;
break;
}
}
if (i == num_values)
*format = _default_video_format_from_chroma (self->rt_format);
}
bail:
gst_clear_caps (&preferred_caps);
}
static gboolean
gst_va_h264_dec_negotiate (GstVideoDecoder * decoder)
{
GstVaH264Dec *self = GST_VA_H264_DEC (decoder);
GstVideoFormat format = GST_VIDEO_FORMAT_UNKNOWN;
GstCapsFeatures *capsfeatures = NULL;
GstH264Decoder *h264dec = GST_H264_DECODER (decoder);
/* Ignore downstream renegotiation request. */
if (!self->need_negotiation)
return TRUE;
self->need_negotiation = FALSE;
if (gst_va_decoder_is_open (self->decoder)
&& !gst_va_decoder_close (self->decoder))
return FALSE;
if (!gst_va_decoder_open (self->decoder, self->profile, self->rt_format))
return FALSE;
if (!gst_va_decoder_set_format (self->decoder, self->coded_width,
self->coded_height, NULL))
return FALSE;
if (self->output_state)
gst_video_codec_state_unref (self->output_state);
_get_preferred_format_and_caps_features (self, &format, &capsfeatures);
self->output_state =
gst_video_decoder_set_output_state (decoder, format,
self->display_width, self->display_height, h264dec->input_state);
self->output_state->caps = gst_video_info_to_caps (&self->output_state->info);
if (capsfeatures)
gst_caps_set_features_simple (self->output_state->caps, capsfeatures);
GST_INFO_OBJECT (self, "Negotiated caps %" GST_PTR_FORMAT,
self->output_state->caps);
return GST_VIDEO_DECODER_CLASS (parent_class)->negotiate (decoder);
}
static inline gboolean
_caps_is_dmabuf (GstVaH264Dec * self, GstCaps * caps)
{
GstCapsFeatures *features;
features = gst_caps_get_features (caps, 0);
return gst_caps_features_contains (features, GST_CAPS_FEATURE_MEMORY_DMABUF)
&& (gst_va_decoder_get_mem_types (self->decoder)
& VA_SURFACE_ATTRIB_MEM_TYPE_DRM_PRIME);
}
static inline gboolean
_caps_is_va_memory (GstCaps * caps)
{
GstCapsFeatures *features;
features = gst_caps_get_features (caps, 0);
return gst_caps_features_contains (features, "memory:VAMemory");
}
static inline void
_shall_copy_frames (GstVaH264Dec * self, GstVideoInfo * info)
{
GstVideoInfo ref_info;
guint i;
self->copy_frames = FALSE;
if (self->has_videometa)
return;
gst_video_info_set_format (&ref_info, GST_VIDEO_INFO_FORMAT (info),
self->display_width, self->display_height);
for (i = 0; i < GST_VIDEO_INFO_N_PLANES (info); i++) {
if (info->stride[i] != ref_info.stride[i] ||
info->offset[i] != ref_info.offset[i]) {
GST_WARNING_OBJECT (self,
"GstVideoMeta support required, copying frames.");
self->copy_frames = TRUE;
break;
}
}
}
static gboolean
_try_allocator (GstVaH264Dec * self, GstAllocator * allocator, GstCaps * caps,
guint * size)
{
GstVaAllocationParams params = {
.usage_hint = VA_SURFACE_ATTRIB_USAGE_HINT_DECODER,
};
if (!gst_video_info_from_caps (&params.info, caps))
return FALSE;
if (self->need_cropping) {
GST_VIDEO_INFO_WIDTH (&params.info) = self->coded_width;
GST_VIDEO_INFO_HEIGHT (&params.info) = self->coded_height;
}
if (GST_IS_VA_DMABUF_ALLOCATOR (allocator)) {
if (!gst_va_dmabuf_try (allocator, &params))
return FALSE;
} else if (GST_IS_VA_ALLOCATOR (allocator)) {
if (!gst_va_allocator_try (allocator, &params))
return FALSE;
if (!_caps_is_va_memory (caps))
_shall_copy_frames (self, &params.info);
} else {
return FALSE;
}
if (size)
*size = GST_VIDEO_INFO_SIZE (&params.info);
return TRUE;
}
static GstAllocator *
_create_allocator (GstVaH264Dec * self, GstCaps * caps, guint * size)
{
GstAllocator *allocator = NULL;
GstVaDisplay *display = NULL;
g_object_get (self->decoder, "display", &display, NULL);
if (_caps_is_dmabuf (self, caps))
allocator = gst_va_dmabuf_allocator_new (display);
else {
GArray *surface_formats =
gst_va_decoder_get_surface_formats (self->decoder);
allocator = gst_va_allocator_new (display, surface_formats);
}
gst_object_unref (display);
if (!_try_allocator (self, allocator, caps, size))
gst_clear_object (&allocator);
return allocator;
}
/* 1. get allocator in query
* 1.1 if allocator is not ours and downstream doesn't handle
* videometa, keep it for other_pool
* 2. get pool in query
* 2.1 if pool is not va, keep it as other_pool if downstream
* doesn't handle videometa or (it doesn't handle alignment and
* the stream needs cropping)
* 2.2 if there's no pool in query and downstream doesn't handle
* videometa, create other_pool as GstVideoPool with the non-va
* from query and query's params
* 3. create our allocator and pool if they aren't in query
* 4. add or update pool and allocator in query
* 5. set our custom pool configuration
*/
static gboolean
gst_va_h264_dec_decide_allocation (GstVideoDecoder * decoder, GstQuery * query)
{
GstAllocator *allocator = NULL, *other_allocator = NULL;
GstAllocationParams other_params, params;
GstBufferPool *pool = NULL;
GstCaps *caps = NULL;
GstStructure *config;
GstVideoInfo info;
GstVaH264Dec *self = GST_VA_H264_DEC (decoder);
guint size, min, max;
gboolean update_pool = FALSE, update_allocator = FALSE, has_videoalignment;
gst_query_parse_allocation (query, &caps, NULL);
if (!(caps && gst_video_info_from_caps (&info, caps)))
goto wrong_caps;
self->has_videometa = gst_query_find_allocation_meta (query,
GST_VIDEO_META_API_TYPE, NULL);
if (gst_query_get_n_allocation_params (query) > 0) {
gst_query_parse_nth_allocation_param (query, 0, &allocator, &other_params);
if (allocator && !(GST_IS_VA_DMABUF_ALLOCATOR (allocator)
|| GST_IS_VA_ALLOCATOR (allocator))) {
/* save the allocator for the other pool */
other_allocator = allocator;
allocator = NULL;
}
update_allocator = TRUE;
} else {
gst_allocation_params_init (&other_params);
}
gst_allocation_params_init (&params);
if (gst_query_get_n_allocation_pools (query) > 0) {
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
if (pool) {
if (!GST_IS_VA_POOL (pool)) {
has_videoalignment = gst_buffer_pool_has_option (pool,
GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT);
if (!self->has_videometa || (!has_videoalignment
&& self->need_cropping)) {
GST_DEBUG_OBJECT (self,
"keeping other pool for copy %" GST_PTR_FORMAT, pool);
gst_object_replace ((GstObject **) & self->other_pool,
(GstObject *) pool);
gst_object_unref (pool); /* decrease previous increase */
}
gst_clear_object (&pool);
}
}
min += self->dpb_size + 4; /* min + dbp size + scratch surfaces */
size = MAX (size, GST_VIDEO_INFO_SIZE (&info));
update_pool = TRUE;
} else {
size = GST_VIDEO_INFO_SIZE (&info);
if (!self->has_videometa && !_caps_is_va_memory (caps)) {
GST_DEBUG_OBJECT (self, "making new other pool for copy");
self->other_pool = gst_video_buffer_pool_new ();
config = gst_buffer_pool_get_config (self->other_pool);
gst_buffer_pool_config_set_params (config, caps, size, 0, 0);
gst_buffer_pool_config_set_allocator (config, other_allocator,
&other_params);
if (!gst_buffer_pool_set_config (self->other_pool, config)) {
GST_ERROR_OBJECT (self, "couldn't configure other pool for copy");
gst_clear_object (&self->other_pool);
}
} else {
gst_clear_object (&other_allocator);
}
min = self->dpb_size + 4; /* dpb size + scratch surfaces */
max = 0;
}
if (!allocator) {
if (!(allocator = _create_allocator (self, caps, &size)))
return FALSE;
}
if (!pool)
pool = gst_va_pool_new ();
{
GstStructure *config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, size, min, max);
gst_buffer_pool_config_set_allocator (config, allocator, &params);
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
if (self->need_cropping) {
GstVideoAlignment video_align = {
.padding_bottom = self->coded_height - self->display_height,
.padding_left = self->coded_width - self->display_width,
};
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT);
gst_buffer_pool_config_set_video_alignment (config, &video_align);
}
gst_buffer_pool_config_set_va_allocation_params (config,
VA_SURFACE_ATTRIB_USAGE_HINT_DECODER);
if (!gst_buffer_pool_set_config (pool, config))
return FALSE;
}
if (update_allocator)
gst_query_set_nth_allocation_param (query, 0, allocator, &params);
else
gst_query_add_allocation_param (query, allocator, &params);
if (update_pool)
gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
else
gst_query_add_allocation_pool (query, pool, size, min, max);
gst_object_unref (allocator);
gst_object_unref (pool);
return GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation (decoder,
query);
wrong_caps:
{
GST_WARNING_OBJECT (self, "No valid caps");
return FALSE;
}
}
static void
gst_va_h264_dec_set_context (GstElement * element, GstContext * context)
{
GstVaDisplay *old_display, *new_display;
GstVaH264Dec *self = GST_VA_H264_DEC (element);
GstVaH264DecClass *klass = GST_VA_H264_DEC_GET_CLASS (self);
gboolean ret;
old_display = self->display ? gst_object_ref (self->display) : NULL;
ret = gst_va_handle_set_context (element, context, klass->render_device_path,
&self->display);
new_display = self->display ? gst_object_ref (self->display) : NULL;
if (!ret
|| (old_display && new_display && old_display != new_display
&& self->decoder)) {
GST_ELEMENT_WARNING (element, RESOURCE, BUSY,
("Can't replace VA display while operating"), (NULL));
}
gst_clear_object (&old_display);
gst_clear_object (&new_display);
GST_ELEMENT_CLASS (parent_class)->set_context (element, context);
}
static void
gst_va_h264_dec_dispose (GObject * object)
{
gst_va_h264_dec_close (GST_VIDEO_DECODER (object));
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_va_h264_dec_class_init (gpointer g_class, gpointer class_data)
{
GstCaps *src_doc_caps, *sink_doc_caps;
GstPadTemplate *sink_pad_templ, *src_pad_templ;
GObjectClass *gobject_class = G_OBJECT_CLASS (g_class);
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
GstH264DecoderClass *h264decoder_class = GST_H264_DECODER_CLASS (g_class);
GstVaH264DecClass *klass = GST_VA_H264_DEC_CLASS (g_class);
GstVideoDecoderClass *decoder_class = GST_VIDEO_DECODER_CLASS (g_class);
struct CData *cdata = class_data;
gchar *long_name;
parent_class = g_type_class_peek_parent (g_class);
klass->render_device_path = g_strdup (cdata->render_device_path);
if (cdata->description) {
long_name = g_strdup_printf ("VA-API H.264 Decoder in %s",
cdata->description);
} else {
long_name = g_strdup ("VA-API H.264 Decoder");
}
gst_element_class_set_metadata (element_class, long_name,
"Codec/Decoder/Video/Hardware",
"VA-API based H.264 video decoder",
"Víctor Jáquez <vjaquez@igalia.com>");
sink_pad_templ = gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
cdata->sink_caps);
gst_element_class_add_pad_template (element_class, sink_pad_templ);
sink_doc_caps = gst_caps_from_string (sink_caps_str);
gst_pad_template_set_documentation_caps (sink_pad_templ, sink_doc_caps);
gst_caps_unref (sink_doc_caps);
src_pad_templ = gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
cdata->src_caps);
gst_element_class_add_pad_template (element_class, src_pad_templ);
src_doc_caps = gst_caps_from_string (src_caps_str);
gst_pad_template_set_documentation_caps (src_pad_templ, src_doc_caps);
gst_caps_unref (src_doc_caps);
gobject_class->dispose = gst_va_h264_dec_dispose;
element_class->set_context = GST_DEBUG_FUNCPTR (gst_va_h264_dec_set_context);
decoder_class->open = GST_DEBUG_FUNCPTR (gst_va_h264_dec_open);
decoder_class->close = GST_DEBUG_FUNCPTR (gst_va_h264_dec_close);
decoder_class->stop = GST_DEBUG_FUNCPTR (gst_va_h264_dec_stop);
decoder_class->getcaps = GST_DEBUG_FUNCPTR (gst_va_h264_dec_sink_getcaps);
decoder_class->src_query = GST_DEBUG_FUNCPTR (gst_va_h264_dec_src_query);
decoder_class->sink_query = GST_DEBUG_FUNCPTR (gst_va_h264_dec_sink_query);
decoder_class->negotiate = GST_DEBUG_FUNCPTR (gst_va_h264_dec_negotiate);
decoder_class->decide_allocation =
GST_DEBUG_FUNCPTR (gst_va_h264_dec_decide_allocation);
h264decoder_class->new_sequence =
GST_DEBUG_FUNCPTR (gst_va_h264_dec_new_sequence);
h264decoder_class->decode_slice =
GST_DEBUG_FUNCPTR (gst_va_h264_dec_decode_slice);
h264decoder_class->new_picture =
GST_DEBUG_FUNCPTR (gst_va_h264_dec_new_picture);
h264decoder_class->output_picture =
GST_DEBUG_FUNCPTR (gst_va_h264_dec_output_picture);
h264decoder_class->start_picture =
GST_DEBUG_FUNCPTR (gst_va_h264_dec_start_picture);
h264decoder_class->end_picture =
GST_DEBUG_FUNCPTR (gst_va_h264_dec_end_picture);
g_free (long_name);
g_free (cdata->description);
g_free (cdata->render_device_path);
gst_caps_unref (cdata->src_caps);
gst_caps_unref (cdata->sink_caps);
g_free (cdata);
}
static void
gst_va_h264_dec_init (GTypeInstance * instance, gpointer g_class)
{
gst_h264_decoder_set_process_ref_pic_lists (GST_H264_DECODER (instance),
TRUE);
}
static gpointer
_register_debug_category (gpointer data)
{
GST_DEBUG_CATEGORY_INIT (gst_va_h264dec_debug, "vah264dec", 0,
"VA h264 decoder");
return NULL;
}
gboolean
gst_va_h264_dec_register (GstPlugin * plugin, GstVaDevice * device,
GstCaps * sink_caps, GstCaps * src_caps, guint rank)
{
static GOnce debug_once = G_ONCE_INIT;
GType type;
GTypeInfo type_info = {
.class_size = sizeof (GstVaH264DecClass),
.class_init = gst_va_h264_dec_class_init,
.instance_size = sizeof (GstVaH264Dec),
.instance_init = gst_va_h264_dec_init,
};
struct CData *cdata;
gboolean ret;
gchar *type_name, *feature_name;
g_return_val_if_fail (GST_IS_PLUGIN (plugin), FALSE);
g_return_val_if_fail (GST_IS_VA_DEVICE (device), FALSE);
g_return_val_if_fail (GST_IS_CAPS (sink_caps), FALSE);
g_return_val_if_fail (GST_IS_CAPS (src_caps), FALSE);
cdata = g_new (struct CData, 1);
cdata->description = NULL;
cdata->render_device_path = g_strdup (device->render_device_path);
cdata->sink_caps = _complete_sink_caps (sink_caps);
cdata->src_caps = gst_caps_ref (src_caps);
/* class data will be leaked if the element never gets instantiated */
GST_MINI_OBJECT_FLAG_SET (cdata->sink_caps,
GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
GST_MINI_OBJECT_FLAG_SET (src_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
type_info.class_data = cdata;
type_name = g_strdup ("GstVaH264Dec");
feature_name = g_strdup ("vah264dec");
/* The first decoder to be registered should use a constant name,
* like vah264dec, for any additional decoders, we create unique
* names, using inserting the render device name. */
if (g_type_from_name (type_name)) {
gchar *basename = g_path_get_basename (device->render_device_path);
g_free (type_name);
g_free (feature_name);
type_name = g_strdup_printf ("GstVa%sH264Dec", basename);
feature_name = g_strdup_printf ("va%sh264dec", basename);
cdata->description = basename;
/* lower rank for non-first device */
if (rank > 0)
rank--;
}
g_once (&debug_once, _register_debug_category, NULL);
type = g_type_register_static (GST_TYPE_H264_DECODER,
type_name, &type_info, 0);
ret = gst_element_register (plugin, feature_name, rank, type);
g_free (type_name);
g_free (feature_name);
return ret;
}
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