[FFmpeg-devel] [PATCH 5/5] h264dec: add V4L2 request API hwaccel
Jonas Karlman
jonas at kwiboo.se
Wed Dec 9 22:25:18 EET 2020
From: Jernej Skrabec <jernej.skrabec at siol.net>
Signed-off-by: Jernej Skrabec <jernej.skrabec at siol.net>
Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
---
Changelog | 1 +
configure | 3 +
libavcodec/Makefile | 1 +
libavcodec/h264_slice.c | 4 +
libavcodec/h264dec.c | 3 +
libavcodec/hwaccels.h | 1 +
libavcodec/v4l2_request_h264.c | 457 +++++++++++++++++++++++++++++++++
libavcodec/version.h | 4 +-
8 files changed, 472 insertions(+), 2 deletions(-)
create mode 100644 libavcodec/v4l2_request_h264.c
diff --git a/Changelog b/Changelog
index 8f5e849f8d..f7930e0816 100644
--- a/Changelog
+++ b/Changelog
@@ -52,6 +52,7 @@ version <next>:
- Microsoft Paint (MSP) version 2 decoder
- Microsoft Paint (MSP) demuxer
- AV1 monochrome encoding support via libaom >= 2.0.1
+- V4L2 mem2mem stateless H.264 hwaccel
version 4.3:
diff --git a/configure b/configure
index fac85bfab4..56a8c407f3 100755
--- a/configure
+++ b/configure
@@ -2945,6 +2945,8 @@ h264_dxva2_hwaccel_deps="dxva2"
h264_dxva2_hwaccel_select="h264_decoder"
h264_nvdec_hwaccel_deps="nvdec"
h264_nvdec_hwaccel_select="h264_decoder"
+h264_v4l2request_hwaccel_deps="v4l2_request h264_v4l2_request"
+h264_v4l2request_hwaccel_select="h264_decoder"
h264_vaapi_hwaccel_deps="vaapi"
h264_vaapi_hwaccel_select="h264_decoder"
h264_vdpau_hwaccel_deps="vdpau"
@@ -6613,6 +6615,7 @@ if enabled v4l2_m2m; then
fi
check_func_headers "linux/media.h linux/videodev2.h" v4l2_timeval_to_ns
+check_cc h264_v4l2_request linux/videodev2.h "int i = V4L2_PIX_FMT_H264_SLICE;"
check_headers sys/videoio.h
test_code cc sys/videoio.h "struct v4l2_frmsizeenum vfse; vfse.discrete.width = 0;" && enable_sanitized struct_v4l2_frmivalenum_discrete
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 2fafc4e028..dcda71fad0 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -926,6 +926,7 @@ OBJS-$(CONFIG_H264_D3D11VA_HWACCEL) += dxva2_h264.o
OBJS-$(CONFIG_H264_DXVA2_HWACCEL) += dxva2_h264.o
OBJS-$(CONFIG_H264_NVDEC_HWACCEL) += nvdec_h264.o
OBJS-$(CONFIG_H264_QSV_HWACCEL) += qsvdec_h2645.o
+OBJS-$(CONFIG_H264_V4L2REQUEST_HWACCEL) += v4l2_request_h264.o
OBJS-$(CONFIG_H264_VAAPI_HWACCEL) += vaapi_h264.o
OBJS-$(CONFIG_H264_VDPAU_HWACCEL) += vdpau_h264.o
OBJS-$(CONFIG_H264_VIDEOTOOLBOX_HWACCEL) += videotoolbox.o
diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c
index 5ad1c347ed..533d84bb01 100644
--- a/libavcodec/h264_slice.c
+++ b/libavcodec/h264_slice.c
@@ -769,6 +769,7 @@ static enum AVPixelFormat get_pixel_format(H264Context *h, int force_callback)
#define HWACCEL_MAX (CONFIG_H264_DXVA2_HWACCEL + \
(CONFIG_H264_D3D11VA_HWACCEL * 2) + \
CONFIG_H264_NVDEC_HWACCEL + \
+ CONFIG_H264_V4L2REQUEST_HWACCEL + \
CONFIG_H264_VAAPI_HWACCEL + \
CONFIG_H264_VIDEOTOOLBOX_HWACCEL + \
CONFIG_H264_VDPAU_HWACCEL)
@@ -853,6 +854,9 @@ static enum AVPixelFormat get_pixel_format(H264Context *h, int force_callback)
#endif
#if CONFIG_H264_VIDEOTOOLBOX_HWACCEL
*fmt++ = AV_PIX_FMT_VIDEOTOOLBOX;
+#endif
+#if CONFIG_H264_V4L2REQUEST_HWACCEL
+ *fmt++ = AV_PIX_FMT_DRM_PRIME;
#endif
if (h->avctx->codec->pix_fmts)
choices = h->avctx->codec->pix_fmts;
diff --git a/libavcodec/h264dec.c b/libavcodec/h264dec.c
index 46495d586f..4ad4d3a3dd 100644
--- a/libavcodec/h264dec.c
+++ b/libavcodec/h264dec.c
@@ -1075,6 +1075,9 @@ AVCodec ff_h264_decoder = {
#endif
#if CONFIG_H264_VIDEOTOOLBOX_HWACCEL
HWACCEL_VIDEOTOOLBOX(h264),
+#endif
+#if CONFIG_H264_V4L2REQUEST_HWACCEL
+ HWACCEL_V4L2REQUEST(h264),
#endif
NULL
},
diff --git a/libavcodec/hwaccels.h b/libavcodec/hwaccels.h
index 8e54cf73f9..969a1da0f4 100644
--- a/libavcodec/hwaccels.h
+++ b/libavcodec/hwaccels.h
@@ -32,6 +32,7 @@ extern const AVHWAccel ff_h264_d3d11va_hwaccel;
extern const AVHWAccel ff_h264_d3d11va2_hwaccel;
extern const AVHWAccel ff_h264_dxva2_hwaccel;
extern const AVHWAccel ff_h264_nvdec_hwaccel;
+extern const AVHWAccel ff_h264_v4l2request_hwaccel;
extern const AVHWAccel ff_h264_vaapi_hwaccel;
extern const AVHWAccel ff_h264_vdpau_hwaccel;
extern const AVHWAccel ff_h264_videotoolbox_hwaccel;
diff --git a/libavcodec/v4l2_request_h264.c b/libavcodec/v4l2_request_h264.c
new file mode 100644
index 0000000000..5ade6616e3
--- /dev/null
+++ b/libavcodec/v4l2_request_h264.c
@@ -0,0 +1,457 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "h264dec.h"
+#include "hwconfig.h"
+#include "v4l2_request.h"
+
+#define OUTPUT_BUFFER_SIZE (4 * 1024 * 1024)
+
+typedef struct V4L2RequestControlsH264 {
+ struct v4l2_ctrl_h264_sps sps;
+ struct v4l2_ctrl_h264_pps pps;
+ struct v4l2_ctrl_h264_scaling_matrix scaling_matrix;
+ struct v4l2_ctrl_h264_decode_params decode_params;
+ struct v4l2_ctrl_h264_slice_params slice_params;
+ struct v4l2_ctrl_h264_pred_weights pred_weights;
+ int pred_weights_required;
+ int first_slice;
+ int num_slices;
+} V4L2RequestControlsH264;
+
+typedef struct V4L2RequestContextH264 {
+ V4L2RequestContext base;
+ int decode_mode;
+ int start_code;
+} V4L2RequestContextH264;
+
+static uint8_t nalu_slice_start_code[] = { 0x00, 0x00, 0x01 };
+
+static void fill_weight_factors(struct v4l2_h264_weight_factors *factors, int list, const H264SliceContext *sl)
+{
+ for (int i = 0; i < sl->ref_count[list]; i++) {
+ if (sl->pwt.luma_weight_flag[list]) {
+ factors->luma_weight[i] = sl->pwt.luma_weight[i][list][0];
+ factors->luma_offset[i] = sl->pwt.luma_weight[i][list][1];
+ } else {
+ factors->luma_weight[i] = 1 << sl->pwt.luma_log2_weight_denom;
+ factors->luma_offset[i] = 0;
+ }
+ for (int j = 0; j < 2; j++) {
+ if (sl->pwt.chroma_weight_flag[list]) {
+ factors->chroma_weight[i][j] = sl->pwt.chroma_weight[i][list][j][0];
+ factors->chroma_offset[i][j] = sl->pwt.chroma_weight[i][list][j][1];
+ } else {
+ factors->chroma_weight[i][j] = 1 << sl->pwt.chroma_log2_weight_denom;
+ factors->chroma_offset[i][j] = 0;
+ }
+ }
+ }
+}
+
+static void fill_dpb_entry(struct v4l2_h264_dpb_entry *entry, const H264Picture *pic)
+{
+ entry->reference_ts = ff_v4l2_request_get_capture_timestamp(pic->f);
+ entry->pic_num = pic->pic_id;
+ entry->frame_num = pic->frame_num;
+ entry->fields = pic->reference & V4L2_H264_FRAME_REF;
+ entry->flags = V4L2_H264_DPB_ENTRY_FLAG_VALID;
+ if (entry->fields)
+ entry->flags |= V4L2_H264_DPB_ENTRY_FLAG_ACTIVE;
+ if (pic->long_ref)
+ entry->flags |= V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM;
+ if (pic->field_picture)
+ entry->flags |= V4L2_H264_DPB_ENTRY_FLAG_FIELD;
+ if (pic->field_poc[0] != INT_MAX)
+ entry->top_field_order_cnt = pic->field_poc[0];
+ if (pic->field_poc[1] != INT_MAX)
+ entry->bottom_field_order_cnt = pic->field_poc[1];
+}
+
+static void fill_dpb(struct v4l2_ctrl_h264_decode_params *decode, const H264Context *h)
+{
+ int entries = 0;
+
+ for (int i = 0; i < h->short_ref_count; i++) {
+ const H264Picture *pic = h->short_ref[i];
+ if (pic && (pic->field_poc[0] != INT_MAX || pic->field_poc[1] != INT_MAX))
+ fill_dpb_entry(&decode->dpb[entries++], pic);
+ }
+
+ if (!h->long_ref_count)
+ return;
+
+ for (int i = 0; i < FF_ARRAY_ELEMS(h->long_ref); i++) {
+ const H264Picture *pic = h->long_ref[i];
+ if (pic && (pic->field_poc[0] != INT_MAX || pic->field_poc[1] != INT_MAX))
+ fill_dpb_entry(&decode->dpb[entries++], pic);
+ }
+}
+
+static void fill_ref_list(struct v4l2_h264_reference *reference, struct v4l2_ctrl_h264_decode_params *decode, const H264Ref *ref)
+{
+ uint64_t timestamp;
+
+ if (!ref->parent)
+ return;
+
+ timestamp = ff_v4l2_request_get_capture_timestamp(ref->parent->f);
+
+ for (uint8_t i = 0; i < FF_ARRAY_ELEMS(decode->dpb); i++) {
+ struct v4l2_h264_dpb_entry *entry = &decode->dpb[i];
+ if ((entry->flags & V4L2_H264_DPB_ENTRY_FLAG_VALID) &&
+ entry->reference_ts == timestamp) {
+ reference->fields = ref->reference & V4L2_H264_FRAME_REF;
+ reference->index = i;
+ return;
+ }
+ }
+}
+
+static void fill_sps(struct v4l2_ctrl_h264_sps *ctrl, const H264Context *h)
+{
+ const SPS *sps = h->ps.sps;
+
+ *ctrl = (struct v4l2_ctrl_h264_sps) {
+ .profile_idc = sps->profile_idc,
+ .constraint_set_flags = sps->constraint_set_flags,
+ .level_idc = sps->level_idc,
+ .seq_parameter_set_id = sps->sps_id,
+ .chroma_format_idc = sps->chroma_format_idc,
+ .bit_depth_luma_minus8 = sps->bit_depth_luma - 8,
+ .bit_depth_chroma_minus8 = sps->bit_depth_chroma - 8,
+ .log2_max_frame_num_minus4 = sps->log2_max_frame_num - 4,
+ .pic_order_cnt_type = sps->poc_type,
+ .log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_poc_lsb - 4,
+ .max_num_ref_frames = sps->ref_frame_count,
+ .num_ref_frames_in_pic_order_cnt_cycle = sps->poc_cycle_length,
+ .offset_for_non_ref_pic = sps->offset_for_non_ref_pic,
+ .offset_for_top_to_bottom_field = sps->offset_for_top_to_bottom_field,
+ .pic_width_in_mbs_minus1 = h->mb_width - 1,
+ .pic_height_in_map_units_minus1 = sps->frame_mbs_only_flag ? h->mb_height - 1 : h->mb_height / 2 - 1,
+ };
+
+ if (sps->poc_cycle_length > 0 && sps->poc_cycle_length <= 255)
+ memcpy(ctrl->offset_for_ref_frame, sps->offset_for_ref_frame, sps->poc_cycle_length * sizeof(ctrl->offset_for_ref_frame[0]));
+
+ if (sps->residual_color_transform_flag)
+ ctrl->flags |= V4L2_H264_SPS_FLAG_SEPARATE_COLOUR_PLANE;
+ if (sps->transform_bypass)
+ ctrl->flags |= V4L2_H264_SPS_FLAG_QPPRIME_Y_ZERO_TRANSFORM_BYPASS;
+ if (sps->delta_pic_order_always_zero_flag)
+ ctrl->flags |= V4L2_H264_SPS_FLAG_DELTA_PIC_ORDER_ALWAYS_ZERO;
+ if (sps->gaps_in_frame_num_allowed_flag)
+ ctrl->flags |= V4L2_H264_SPS_FLAG_GAPS_IN_FRAME_NUM_VALUE_ALLOWED;
+ if (sps->frame_mbs_only_flag)
+ ctrl->flags |= V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY;
+ if (sps->mb_aff)
+ ctrl->flags |= V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD;
+ if (sps->direct_8x8_inference_flag)
+ ctrl->flags |= V4L2_H264_SPS_FLAG_DIRECT_8X8_INFERENCE;
+}
+
+static void fill_pps(struct v4l2_ctrl_h264_pps *ctrl, const H264Context *h)
+{
+ const SPS *sps = h->ps.sps;
+ const PPS *pps = h->ps.pps;
+ const H264SliceContext *sl = &h->slice_ctx[0];
+ int qp_bd_offset = 6 * (sps->bit_depth_luma - 8);
+
+ *ctrl = (struct v4l2_ctrl_h264_pps) {
+ .pic_parameter_set_id = sl->pps_id,
+ .seq_parameter_set_id = pps->sps_id,
+ .num_slice_groups_minus1 = pps->slice_group_count - 1,
+ .num_ref_idx_l0_default_active_minus1 = pps->ref_count[0] - 1,
+ .num_ref_idx_l1_default_active_minus1 = pps->ref_count[1] - 1,
+ .weighted_bipred_idc = pps->weighted_bipred_idc,
+ .pic_init_qp_minus26 = pps->init_qp - 26 - qp_bd_offset,
+ .pic_init_qs_minus26 = pps->init_qs - 26 - qp_bd_offset,
+ .chroma_qp_index_offset = pps->chroma_qp_index_offset[0],
+ .second_chroma_qp_index_offset = pps->chroma_qp_index_offset[1],
+ };
+
+ if (pps->cabac)
+ ctrl->flags |= V4L2_H264_PPS_FLAG_ENTROPY_CODING_MODE;
+ if (pps->pic_order_present)
+ ctrl->flags |= V4L2_H264_PPS_FLAG_BOTTOM_FIELD_PIC_ORDER_IN_FRAME_PRESENT;
+ if (pps->weighted_pred)
+ ctrl->flags |= V4L2_H264_PPS_FLAG_WEIGHTED_PRED;
+ if (pps->deblocking_filter_parameters_present)
+ ctrl->flags |= V4L2_H264_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT;
+ if (pps->constrained_intra_pred)
+ ctrl->flags |= V4L2_H264_PPS_FLAG_CONSTRAINED_INTRA_PRED;
+ if (pps->redundant_pic_cnt_present)
+ ctrl->flags |= V4L2_H264_PPS_FLAG_REDUNDANT_PIC_CNT_PRESENT;
+ if (pps->transform_8x8_mode)
+ ctrl->flags |= V4L2_H264_PPS_FLAG_TRANSFORM_8X8_MODE;
+
+ /* FFmpeg always provide a scaling matrix */
+ ctrl->flags |= V4L2_H264_PPS_FLAG_SCALING_MATRIX_PRESENT;
+}
+
+static int v4l2_request_h264_start_frame(AVCodecContext *avctx,
+ av_unused const uint8_t *buffer,
+ av_unused uint32_t size)
+{
+ const H264Context *h = avctx->priv_data;
+ const PPS *pps = h->ps.pps;
+ const SPS *sps = h->ps.sps;
+ const H264SliceContext *sl = &h->slice_ctx[0];
+ V4L2RequestControlsH264 *controls = h->cur_pic_ptr->hwaccel_picture_private;
+
+ fill_sps(&controls->sps, h);
+ fill_pps(&controls->pps, h);
+
+ memcpy(controls->scaling_matrix.scaling_list_4x4, pps->scaling_matrix4, sizeof(controls->scaling_matrix.scaling_list_4x4));
+ memcpy(controls->scaling_matrix.scaling_list_8x8[0], pps->scaling_matrix8[0], sizeof(controls->scaling_matrix.scaling_list_8x8[0]));
+ memcpy(controls->scaling_matrix.scaling_list_8x8[1], pps->scaling_matrix8[3], sizeof(controls->scaling_matrix.scaling_list_8x8[1]));
+
+ if (sps->chroma_format_idc == 3) {
+ memcpy(controls->scaling_matrix.scaling_list_8x8[2], pps->scaling_matrix8[1], sizeof(controls->scaling_matrix.scaling_list_8x8[2]));
+ memcpy(controls->scaling_matrix.scaling_list_8x8[3], pps->scaling_matrix8[4], sizeof(controls->scaling_matrix.scaling_list_8x8[3]));
+ memcpy(controls->scaling_matrix.scaling_list_8x8[4], pps->scaling_matrix8[2], sizeof(controls->scaling_matrix.scaling_list_8x8[4]));
+ memcpy(controls->scaling_matrix.scaling_list_8x8[5], pps->scaling_matrix8[5], sizeof(controls->scaling_matrix.scaling_list_8x8[5]));
+ }
+
+ controls->decode_params = (struct v4l2_ctrl_h264_decode_params) {
+ .nal_ref_idc = h->nal_ref_idc,
+ .frame_num = h->poc.frame_num,
+ .top_field_order_cnt = h->cur_pic_ptr->field_poc[0] != INT_MAX ? h->cur_pic_ptr->field_poc[0] : 0,
+ .bottom_field_order_cnt = h->cur_pic_ptr->field_poc[1] != INT_MAX ? h->cur_pic_ptr->field_poc[1] : 0,
+ .idr_pic_id = sl->idr_pic_id,
+ .pic_order_cnt_lsb = sl->poc_lsb,
+ .delta_pic_order_cnt_bottom = sl->delta_poc_bottom,
+ .delta_pic_order_cnt0 = sl->delta_poc[0],
+ .delta_pic_order_cnt1 = sl->delta_poc[1],
+ /* size in bits of dec_ref_pic_marking() syntax element. */
+ .dec_ref_pic_marking_bit_size = sl->ref_pic_marking_bit_size,
+ /* size in bits of pic order count syntax. */
+ .pic_order_cnt_bit_size = sl->pic_order_cnt_bit_size,
+ .slice_group_change_cycle = 0, /* slice group not supported by FFmpeg */
+ };
+
+ if (h->picture_idr)
+ controls->decode_params.flags |= V4L2_H264_DECODE_PARAM_FLAG_IDR_PIC;
+ if (FIELD_PICTURE(h))
+ controls->decode_params.flags |= V4L2_H264_DECODE_PARAM_FLAG_FIELD_PIC;
+ if (h->picture_structure == PICT_BOTTOM_FIELD)
+ controls->decode_params.flags |= V4L2_H264_DECODE_PARAM_FLAG_BOTTOM_FIELD;
+
+ fill_dpb(&controls->decode_params, h);
+
+ controls->first_slice = !FIELD_PICTURE(h) || h->first_field;
+ controls->num_slices = 0;
+
+ return ff_v4l2_request_reset_frame(avctx, h->cur_pic_ptr->f);
+}
+
+static int v4l2_request_h264_queue_decode(AVCodecContext *avctx, int last_slice)
+{
+ const H264Context *h = avctx->priv_data;
+ V4L2RequestControlsH264 *controls = h->cur_pic_ptr->hwaccel_picture_private;
+ V4L2RequestContextH264 *ctx = avctx->internal->hwaccel_priv_data;
+
+ struct v4l2_ext_control control[] = {
+ {
+ .id = V4L2_CID_STATELESS_H264_SPS,
+ .ptr = &controls->sps,
+ .size = sizeof(controls->sps),
+ },
+ {
+ .id = V4L2_CID_STATELESS_H264_PPS,
+ .ptr = &controls->pps,
+ .size = sizeof(controls->pps),
+ },
+ {
+ .id = V4L2_CID_STATELESS_H264_SCALING_MATRIX,
+ .ptr = &controls->scaling_matrix,
+ .size = sizeof(controls->scaling_matrix),
+ },
+ {
+ .id = V4L2_CID_STATELESS_H264_DECODE_PARAMS,
+ .ptr = &controls->decode_params,
+ .size = sizeof(controls->decode_params),
+ },
+ {
+ .id = V4L2_CID_STATELESS_H264_SLICE_PARAMS,
+ .ptr = &controls->slice_params,
+ .size = sizeof(controls->slice_params),
+ },
+ {
+ .id = V4L2_CID_STATELESS_H264_PRED_WEIGHTS,
+ .ptr = &controls->pred_weights,
+ .size = sizeof(controls->pred_weights),
+ },
+ };
+
+ if (ctx->decode_mode == V4L2_STATELESS_H264_DECODE_MODE_SLICE_BASED) {
+ int count = FF_ARRAY_ELEMS(control) - (controls->pred_weights_required ? 0 : 1);
+ return ff_v4l2_request_decode_slice(avctx, h->cur_pic_ptr->f, control, count, controls->first_slice, last_slice);
+ }
+
+ return ff_v4l2_request_decode_frame(avctx, h->cur_pic_ptr->f, control, FF_ARRAY_ELEMS(control) - 2);
+}
+
+static int v4l2_request_h264_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
+{
+ const H264Context *h = avctx->priv_data;
+ const PPS *pps = h->ps.pps;
+ const H264SliceContext *sl = &h->slice_ctx[0];
+ V4L2RequestControlsH264 *controls = h->cur_pic_ptr->hwaccel_picture_private;
+ V4L2RequestContextH264 *ctx = avctx->internal->hwaccel_priv_data;
+ int i, ret, count;
+
+ if (ctx->decode_mode == V4L2_STATELESS_H264_DECODE_MODE_SLICE_BASED && controls->num_slices) {
+ ret = v4l2_request_h264_queue_decode(avctx, 0);
+ if (ret)
+ return ret;
+
+ ff_v4l2_request_reset_frame(avctx, h->cur_pic_ptr->f);
+ controls->first_slice = 0;
+ }
+
+ if (ctx->start_code == V4L2_STATELESS_H264_START_CODE_ANNEX_B) {
+ ret = ff_v4l2_request_append_output_buffer(avctx, h->cur_pic_ptr->f, nalu_slice_start_code, 3);
+ if (ret)
+ return ret;
+ }
+
+ ret = ff_v4l2_request_append_output_buffer(avctx, h->cur_pic_ptr->f, buffer, size);
+ if (ret)
+ return ret;
+
+ if (ctx->decode_mode != V4L2_STATELESS_H264_DECODE_MODE_SLICE_BASED)
+ return 0;
+
+ controls->slice_params = (struct v4l2_ctrl_h264_slice_params) {
+ /* offset in bits to slice_data() from the beginning of this slice. */
+ .header_bit_size = get_bits_count(&sl->gb),
+ .first_mb_in_slice = sl->first_mb_addr,
+ .slice_type = ff_h264_get_slice_type(sl),
+ .colour_plane_id = 0, /* separate colour plane not supported by FFmpeg */
+ .redundant_pic_cnt = sl->redundant_pic_count,
+ .cabac_init_idc = sl->cabac_init_idc,
+ .slice_qp_delta = sl->qscale - pps->init_qp,
+ .slice_qs_delta = 0, /* not implemented by FFmpeg */
+ .disable_deblocking_filter_idc = sl->deblocking_filter < 2 ? !sl->deblocking_filter : sl->deblocking_filter,
+ .slice_alpha_c0_offset_div2 = sl->slice_alpha_c0_offset / 2,
+ .slice_beta_offset_div2 = sl->slice_beta_offset / 2,
+ .num_ref_idx_l0_active_minus1 = sl->list_count > 0 ? sl->ref_count[0] - 1 : 0,
+ .num_ref_idx_l1_active_minus1 = sl->list_count > 1 ? sl->ref_count[1] - 1 : 0,
+ };
+
+ if (sl->slice_type == AV_PICTURE_TYPE_B && sl->direct_spatial_mv_pred)
+ controls->slice_params.flags |= V4L2_H264_SLICE_FLAG_DIRECT_SPATIAL_MV_PRED;
+ /* V4L2_H264_SLICE_FLAG_SP_FOR_SWITCH: not implemented by FFmpeg */
+
+ controls->pred_weights_required = V4L2_H264_CTRL_PRED_WEIGHTS_REQUIRED(&controls->pps, &controls->slice_params);
+ if (controls->pred_weights_required) {
+ controls->pred_weights.chroma_log2_weight_denom = sl->pwt.chroma_log2_weight_denom;
+ controls->pred_weights.luma_log2_weight_denom = sl->pwt.luma_log2_weight_denom;
+ }
+
+ count = sl->list_count > 0 ? sl->ref_count[0] : 0;
+ for (i = 0; i < count; i++)
+ fill_ref_list(&controls->slice_params.ref_pic_list0[i], &controls->decode_params, &sl->ref_list[0][i]);
+ if (count && controls->pred_weights_required)
+ fill_weight_factors(&controls->pred_weights.weight_factors[0], 0, sl);
+
+ count = sl->list_count > 1 ? sl->ref_count[1] : 0;
+ for (i = 0; i < count; i++)
+ fill_ref_list(&controls->slice_params.ref_pic_list1[i], &controls->decode_params, &sl->ref_list[1][i]);
+ if (count && controls->pred_weights_required)
+ fill_weight_factors(&controls->pred_weights.weight_factors[1], 1, sl);
+
+ controls->num_slices++;
+ return 0;
+}
+
+static int v4l2_request_h264_end_frame(AVCodecContext *avctx)
+{
+ const H264Context *h = avctx->priv_data;
+
+ return v4l2_request_h264_queue_decode(avctx, !FIELD_PICTURE(h) || !h->first_field);
+}
+
+static int v4l2_request_h264_set_controls(AVCodecContext *avctx)
+{
+ V4L2RequestContextH264 *ctx = avctx->internal->hwaccel_priv_data;
+
+ struct v4l2_ext_control control[] = {
+ { .id = V4L2_CID_STATELESS_H264_DECODE_MODE, },
+ { .id = V4L2_CID_STATELESS_H264_START_CODE, },
+ };
+
+ ctx->decode_mode = ff_v4l2_request_query_control_default_value(avctx, V4L2_CID_STATELESS_H264_DECODE_MODE);
+ if (ctx->decode_mode != V4L2_STATELESS_H264_DECODE_MODE_SLICE_BASED &&
+ ctx->decode_mode != V4L2_STATELESS_H264_DECODE_MODE_FRAME_BASED) {
+ av_log(avctx, AV_LOG_ERROR, "%s: unsupported decode mode, %d\n", __func__, ctx->decode_mode);
+ return AVERROR(EINVAL);
+ }
+
+ ctx->start_code = ff_v4l2_request_query_control_default_value(avctx, V4L2_CID_STATELESS_H264_START_CODE);
+ if (ctx->start_code != V4L2_STATELESS_H264_START_CODE_NONE &&
+ ctx->start_code != V4L2_STATELESS_H264_START_CODE_ANNEX_B) {
+ av_log(avctx, AV_LOG_ERROR, "%s: unsupported start code, %d\n", __func__, ctx->start_code);
+ return AVERROR(EINVAL);
+ }
+
+ control[0].value = ctx->decode_mode;
+ control[1].value = ctx->start_code;
+
+ return ff_v4l2_request_set_controls(avctx, control, FF_ARRAY_ELEMS(control));
+}
+
+static int v4l2_request_h264_init(AVCodecContext *avctx)
+{
+ const H264Context *h = avctx->priv_data;
+ struct v4l2_ctrl_h264_sps sps;
+ int ret;
+
+ struct v4l2_ext_control control[] = {
+ {
+ .id = V4L2_CID_STATELESS_H264_SPS,
+ .ptr = &sps,
+ .size = sizeof(sps),
+ },
+ };
+
+ fill_sps(&sps, h);
+
+ ret = ff_v4l2_request_init(avctx, V4L2_PIX_FMT_H264_SLICE, OUTPUT_BUFFER_SIZE, control, FF_ARRAY_ELEMS(control));
+ if (ret)
+ return ret;
+
+ return v4l2_request_h264_set_controls(avctx);
+}
+
+const AVHWAccel ff_h264_v4l2request_hwaccel = {
+ .name = "h264_v4l2request",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_H264,
+ .pix_fmt = AV_PIX_FMT_DRM_PRIME,
+ .start_frame = v4l2_request_h264_start_frame,
+ .decode_slice = v4l2_request_h264_decode_slice,
+ .end_frame = v4l2_request_h264_end_frame,
+ .frame_priv_data_size = sizeof(V4L2RequestControlsH264),
+ .init = v4l2_request_h264_init,
+ .uninit = ff_v4l2_request_uninit,
+ .priv_data_size = sizeof(V4L2RequestContextH264),
+ .frame_params = ff_v4l2_request_frame_params,
+ .caps_internal = HWACCEL_CAP_ASYNC_SAFE,
+};
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 5b92afe60a..1420439044 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -28,8 +28,8 @@
#include "libavutil/version.h"
#define LIBAVCODEC_VERSION_MAJOR 58
-#define LIBAVCODEC_VERSION_MINOR 115
-#define LIBAVCODEC_VERSION_MICRO 102
+#define LIBAVCODEC_VERSION_MINOR 116
+#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \
--
2.17.1
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