/* GStreamer * Copyright (C) 2020 Igalia, S.L. * Author: Víctor Jáquez * * 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 "gstvabasedec.h" GST_DEBUG_CATEGORY_STATIC (gst_va_h264dec_debug); #ifndef GST_DISABLE_GST_DEBUG #define GST_CAT_DEFAULT gst_va_h264dec_debug #else #define GST_CAT_DEFAULT NULL #endif #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 { GstVaBaseDecClass parent_class; }; struct _GstVaH264Dec { GstVaBaseDec parent; GstFlowReturn last_ret; gint coded_width; gint coded_height; gint dpb_size; gboolean need_negotiation; }; #define parent_class gst_va_base_dec_parent_class extern gpointer gst_va_base_dec_parent_class; /* *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) { GstVaBaseDec *base = GST_VA_BASE_DEC (decoder); GstVaDecodePicture *va_pic; GST_LOG_OBJECT (base, "end picture %p, (poc %d)", picture, picture->pic_order_cnt); va_pic = gst_h264_picture_get_user_data (picture); return gst_va_decoder_decode (base->decoder, va_pic); } static GstFlowReturn gst_va_h264_dec_output_picture (GstH264Decoder * decoder, GstVideoCodecFrame * frame, GstH264Picture * picture) { GstVaBaseDec *base = GST_VA_BASE_DEC (decoder); 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 (base->copy_frames) gst_va_base_dec_copy_output_buffer (base, 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 (GST_H264_PICTURE_IS_LONG_TERM_REF (picture)) { va_picture->flags |= VA_PICTURE_H264_LONG_TERM_REFERENCE; va_picture->frame_idx = picture->long_term_frame_idx; } else { if (GST_H264_PICTURE_IS_SHORT_TERM_REF (picture)) 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; GstVaBaseDec *base = GST_VA_BASE_DEC (decoder); GstVaDecodePicture *va_pic; VASliceParameterBufferH264 slice_param; gboolean ret; /* *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 (base->decoder, va_pic, &slice_param, sizeof (slice_param), slice->nalu.data + slice->nalu.offset, slice->nalu.size); if (!ret) { gst_va_decoder_destroy_buffers (base->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; GstVaBaseDec *base = GST_VA_BASE_DEC (decoder); GstVaDecodePicture *va_pic; VAIQMatrixBufferH264 iq_matrix = { 0, }; VAPictureParameterBufferH264 pic_param; guint i, n; 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 (base->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 (base->decoder, va_pic, VAIQMatrixBufferType, &iq_matrix, sizeof (iq_matrix))) goto fail; return TRUE; fail: { gst_va_decoder_destroy_buffers (base->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) { GstVaBaseDec *base = GST_VA_BASE_DEC (self); 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 (base->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) { GstVaBaseDec *base = GST_VA_BASE_DEC (decoder); 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 (base->decoder, profile, rt_format, sps->width, sps->height)) { base->profile = profile; base->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 (base->width != display_width || base->height != display_height) { base->width = display_width; base->height = display_height; negotiation_needed = TRUE; GST_INFO_OBJECT (self, "Resolution changed to %dx%d", base->width, base->height); } base->need_valign = base->width < self->coded_width || base->height < self->coded_height; if (base->need_valign) { /* *INDENT-OFF* */ base->valign = (GstVideoAlignment) { .padding_bottom = self->coded_height - base->height, .padding_right = self->coded_width - base->width, }; /* *INDENT-ON* */ } base->min_buffers = self->dpb_size + 4; /* dpb size + scratch surfaces */ 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 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_getcaps (GstVideoDecoder * decoder, GstCaps * filter) { GstCaps *sinkcaps, *caps = NULL, *tmp; GstVaBaseDec *base = GST_VA_BASE_DEC (decoder); if (base->decoder) caps = gst_va_decoder_get_sinkpad_caps (base->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 (base, "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_negotiate (GstVideoDecoder * decoder) { GstVaBaseDec *base = GST_VA_BASE_DEC (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 (base->decoder) && !gst_va_decoder_close (base->decoder)) return FALSE; if (!gst_va_decoder_open (base->decoder, base->profile, base->rt_format)) return FALSE; if (!gst_va_decoder_set_format (base->decoder, self->coded_width, self->coded_height, NULL)) return FALSE; if (base->output_state) gst_video_codec_state_unref (base->output_state); gst_va_base_dec_get_preferred_format_and_caps_features (base, &format, &capsfeatures); base->output_state = gst_video_decoder_set_output_state (decoder, format, base->width, base->height, h264dec->input_state); base->output_state->caps = gst_video_info_to_caps (&base->output_state->info); if (capsfeatures) gst_caps_set_features_simple (base->output_state->caps, capsfeatures); GST_INFO_OBJECT (self, "Negotiated caps %" GST_PTR_FORMAT, base->output_state->caps); return GST_VIDEO_DECODER_CLASS (parent_class)->negotiate (decoder); } static void gst_va_h264_dec_dispose (GObject * object) { gst_va_base_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; 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); GstVideoDecoderClass *decoder_class = GST_VIDEO_DECODER_CLASS (g_class); struct CData *cdata = class_data; gchar *long_name; 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 "); sink_doc_caps = gst_caps_from_string (sink_caps_str); src_doc_caps = gst_caps_from_string (src_caps_str); gst_va_base_dec_class_init (GST_VA_BASE_DEC_CLASS (g_class), H264, cdata->render_device_path, cdata->sink_caps, cdata->src_caps, src_doc_caps, sink_doc_caps); gobject_class->dispose = gst_va_h264_dec_dispose; decoder_class->getcaps = GST_DEBUG_FUNCPTR (gst_va_h264_dec_getcaps); decoder_class->negotiate = GST_DEBUG_FUNCPTR (gst_va_h264_dec_negotiate); 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_va_base_dec_init (GST_VA_BASE_DEC (instance), GST_CAT_DEFAULT); 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; }