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[FFmpeg-devel,2/3] hw_base_encode_h265: split off SPS/PPS/VPS generation from VAAPI

Message ID 20240912082334.925402-2-dev@lynne.ee
State New
Headers show
Series [FFmpeg-devel,1/3] cbs_h265: add raw filler encoding | expand

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Commit Message

Lynne Sept. 12, 2024, 8:23 a.m. UTC
---
 libavcodec/hw_base_encode_h265.c | 351 +++++++++++++++++++++++++++++++
 libavcodec/hw_base_encode_h265.h |  56 +++++
 2 files changed, 407 insertions(+)
 create mode 100644 libavcodec/hw_base_encode_h265.c
 create mode 100644 libavcodec/hw_base_encode_h265.h
diff mbox series

Patch

diff --git a/libavcodec/hw_base_encode_h265.c b/libavcodec/hw_base_encode_h265.c
new file mode 100644
index 0000000000..dceec8aba9
--- /dev/null
+++ b/libavcodec/hw_base_encode_h265.c
@@ -0,0 +1,351 @@ 
+/*
+ * 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 "hw_base_encode_h265.h"
+
+#include "h2645data.h"
+#include "h265_profile_level.h"
+
+#include "libavutil/pixdesc.h"
+
+int ff_hw_base_encode_init_params_h265(FFHWBaseEncodeContext *base_ctx,
+                                       AVCodecContext *avctx,
+                                       FFHWBaseEncodeH265 *common,
+                                       FFHWBaseEncodeH265Opts *opts)
+{
+    H265RawVPS                        *vps = &common->raw_vps;
+    H265RawSPS                        *sps = &common->raw_sps;
+    H265RawPPS                        *pps = &common->raw_pps;
+    H265RawProfileTierLevel           *ptl = &vps->profile_tier_level;
+    H265RawVUI                        *vui = &sps->vui;
+
+    const AVPixFmtDescriptor *desc;
+    int chroma_format, bit_depth;
+    int i;
+
+    memset(vps, 0, sizeof(*vps));
+    memset(sps, 0, sizeof(*sps));
+    memset(pps, 0, sizeof(*pps));
+
+    desc = av_pix_fmt_desc_get(base_ctx->input_frames->sw_format);
+    av_assert0(desc);
+    if (desc->nb_components == 1) {
+        chroma_format = 0;
+    } else {
+        if (desc->log2_chroma_w == 1 && desc->log2_chroma_h == 1) {
+            chroma_format = 1;
+        } else if (desc->log2_chroma_w == 1 && desc->log2_chroma_h == 0) {
+            chroma_format = 2;
+        } else if (desc->log2_chroma_w == 0 && desc->log2_chroma_h == 0) {
+            chroma_format = 3;
+        } else {
+            av_log(avctx, AV_LOG_ERROR, "Chroma format of input pixel format "
+                   "%s is not supported.\n", desc->name);
+            return AVERROR(EINVAL);
+        }
+    }
+    bit_depth = desc->comp[0].depth;
+
+
+    // VPS
+
+    vps->nal_unit_header = (H265RawNALUnitHeader) {
+        .nal_unit_type         = HEVC_NAL_VPS,
+        .nuh_layer_id          = 0,
+        .nuh_temporal_id_plus1 = 1,
+    };
+
+    vps->vps_video_parameter_set_id = 0;
+
+    vps->vps_base_layer_internal_flag  = 1;
+    vps->vps_base_layer_available_flag = 1;
+    vps->vps_max_layers_minus1         = 0;
+    vps->vps_max_sub_layers_minus1     = 0;
+    vps->vps_temporal_id_nesting_flag  = 1;
+
+    ptl->general_profile_space = 0;
+    ptl->general_profile_idc   = avctx->profile;
+    ptl->general_tier_flag     = opts->tier;
+
+    ptl->general_profile_compatibility_flag[ptl->general_profile_idc] = 1;
+
+    if (ptl->general_profile_compatibility_flag[1])
+        ptl->general_profile_compatibility_flag[2] = 1;
+    if (ptl->general_profile_compatibility_flag[3]) {
+        ptl->general_profile_compatibility_flag[1] = 1;
+        ptl->general_profile_compatibility_flag[2] = 1;
+    }
+
+    ptl->general_progressive_source_flag    = 1;
+    ptl->general_interlaced_source_flag     = 0;
+    ptl->general_non_packed_constraint_flag = 1;
+    ptl->general_frame_only_constraint_flag = 1;
+
+    ptl->general_max_14bit_constraint_flag = bit_depth <= 14;
+    ptl->general_max_12bit_constraint_flag = bit_depth <= 12;
+    ptl->general_max_10bit_constraint_flag = bit_depth <= 10;
+    ptl->general_max_8bit_constraint_flag  = bit_depth ==  8;
+
+    ptl->general_max_422chroma_constraint_flag  = chroma_format <= 2;
+    ptl->general_max_420chroma_constraint_flag  = chroma_format <= 1;
+    ptl->general_max_monochrome_constraint_flag = chroma_format == 0;
+
+    ptl->general_intra_constraint_flag = base_ctx->gop_size == 1;
+    ptl->general_one_picture_only_constraint_flag = 0;
+
+    ptl->general_lower_bit_rate_constraint_flag = 1;
+
+    if (avctx->level != AV_LEVEL_UNKNOWN) {
+        ptl->general_level_idc = avctx->level;
+    } else {
+        const H265LevelDescriptor *level;
+
+        level = ff_h265_guess_level(ptl, avctx->bit_rate,
+                                    base_ctx->surface_width, base_ctx->surface_height,
+                                    opts->nb_slices, opts->tile_rows, opts->tile_cols,
+                                    (base_ctx->b_per_p > 0) + 1);
+        if (level) {
+            av_log(avctx, AV_LOG_VERBOSE, "Using level %s.\n", level->name);
+            ptl->general_level_idc = level->level_idc;
+        } else {
+            av_log(avctx, AV_LOG_VERBOSE, "Stream will not conform to "
+                   "any normal level; using level 8.5.\n");
+            ptl->general_level_idc = 255;
+            // The tier flag must be set in level 8.5.
+            ptl->general_tier_flag = 1;
+        }
+    }
+
+    vps->vps_sub_layer_ordering_info_present_flag = 0;
+    vps->vps_max_dec_pic_buffering_minus1[0]      = base_ctx->max_b_depth + 1;
+    vps->vps_max_num_reorder_pics[0]              = base_ctx->max_b_depth;
+    vps->vps_max_latency_increase_plus1[0]        = 0;
+
+    vps->vps_max_layer_id             = 0;
+    vps->vps_num_layer_sets_minus1    = 0;
+    vps->layer_id_included_flag[0][0] = 1;
+
+    vps->vps_timing_info_present_flag = 1;
+    if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
+        vps->vps_num_units_in_tick  = avctx->framerate.den;
+        vps->vps_time_scale         = avctx->framerate.num;
+        vps->vps_poc_proportional_to_timing_flag = 1;
+        vps->vps_num_ticks_poc_diff_one_minus1   = 0;
+    } else {
+        vps->vps_num_units_in_tick  = avctx->time_base.num;
+        vps->vps_time_scale         = avctx->time_base.den;
+        vps->vps_poc_proportional_to_timing_flag = 0;
+    }
+    vps->vps_num_hrd_parameters = 0;
+
+
+    // SPS
+
+    sps->nal_unit_header = (H265RawNALUnitHeader) {
+        .nal_unit_type         = HEVC_NAL_SPS,
+        .nuh_layer_id          = 0,
+        .nuh_temporal_id_plus1 = 1,
+    };
+
+    sps->sps_video_parameter_set_id = vps->vps_video_parameter_set_id;
+
+    sps->sps_max_sub_layers_minus1    = vps->vps_max_sub_layers_minus1;
+    sps->sps_temporal_id_nesting_flag = vps->vps_temporal_id_nesting_flag;
+
+    sps->profile_tier_level = vps->profile_tier_level;
+
+    sps->sps_seq_parameter_set_id = 0;
+
+    sps->chroma_format_idc          = chroma_format;
+    sps->separate_colour_plane_flag = 0;
+
+    sps->pic_width_in_luma_samples  = base_ctx->surface_width;
+    sps->pic_height_in_luma_samples = base_ctx->surface_height;
+
+    if (avctx->width  != base_ctx->surface_width ||
+        avctx->height != base_ctx->surface_height) {
+        sps->conformance_window_flag = 1;
+        sps->conf_win_left_offset   = 0;
+        sps->conf_win_right_offset  =
+            (base_ctx->surface_width - avctx->width) >> desc->log2_chroma_w;
+        sps->conf_win_top_offset    = 0;
+        sps->conf_win_bottom_offset =
+            (base_ctx->surface_height - avctx->height) >> desc->log2_chroma_h;
+    } else {
+        sps->conformance_window_flag = 0;
+    }
+
+    sps->bit_depth_luma_minus8   = bit_depth - 8;
+    sps->bit_depth_chroma_minus8 = bit_depth - 8;
+
+    sps->log2_max_pic_order_cnt_lsb_minus4 = 8;
+
+    sps->sps_sub_layer_ordering_info_present_flag =
+        vps->vps_sub_layer_ordering_info_present_flag;
+    for (i = 0; i <= sps->sps_max_sub_layers_minus1; i++) {
+        sps->sps_max_dec_pic_buffering_minus1[i] =
+            vps->vps_max_dec_pic_buffering_minus1[i];
+        sps->sps_max_num_reorder_pics[i] =
+            vps->vps_max_num_reorder_pics[i];
+        sps->sps_max_latency_increase_plus1[i] =
+            vps->vps_max_latency_increase_plus1[i];
+    }
+
+    // These values come from the capabilities of the first encoder
+    // implementation in the i965 driver on Intel Skylake.  They may
+    // fail badly with other platforms or drivers.
+    // CTB size from 8x8 to 32x32.
+    sps->log2_min_luma_coding_block_size_minus3   = 0;
+    sps->log2_diff_max_min_luma_coding_block_size = 2;
+    // Transform size from 4x4 to 32x32.
+    sps->log2_min_luma_transform_block_size_minus2   = 0;
+    sps->log2_diff_max_min_luma_transform_block_size = 3;
+    // Full transform hierarchy allowed (2-5).
+    sps->max_transform_hierarchy_depth_inter = 3;
+    sps->max_transform_hierarchy_depth_intra = 3;
+    // AMP works.
+    sps->amp_enabled_flag = 1;
+    // SAO and temporal MVP do not work.
+    sps->sample_adaptive_offset_enabled_flag = 0;
+    sps->sps_temporal_mvp_enabled_flag       = 0;
+
+    sps->pcm_enabled_flag = 0;
+
+    // STRPSs should ideally be here rather than defined individually in
+    // each slice, but the structure isn't completely fixed so for now
+    // don't bother.
+    sps->num_short_term_ref_pic_sets     = 0;
+    sps->long_term_ref_pics_present_flag = 0;
+
+    sps->vui_parameters_present_flag = 1;
+
+    if (avctx->sample_aspect_ratio.num != 0 &&
+        avctx->sample_aspect_ratio.den != 0) {
+        int num, den, i;
+        av_reduce(&num, &den, avctx->sample_aspect_ratio.num,
+                  avctx->sample_aspect_ratio.den, 65535);
+        for (i = 0; i < FF_ARRAY_ELEMS(ff_h2645_pixel_aspect); i++) {
+            if (num == ff_h2645_pixel_aspect[i].num &&
+                den == ff_h2645_pixel_aspect[i].den) {
+                vui->aspect_ratio_idc = i;
+                break;
+            }
+        }
+        if (i >= FF_ARRAY_ELEMS(ff_h2645_pixel_aspect)) {
+            vui->aspect_ratio_idc = 255;
+            vui->sar_width  = num;
+            vui->sar_height = den;
+        }
+        vui->aspect_ratio_info_present_flag = 1;
+    }
+
+    // Unspecified video format, from table E-2.
+    vui->video_format             = 5;
+    vui->video_full_range_flag    =
+        avctx->color_range == AVCOL_RANGE_JPEG;
+    vui->colour_primaries         = avctx->color_primaries;
+    vui->transfer_characteristics = avctx->color_trc;
+    vui->matrix_coefficients      = avctx->colorspace;
+    if (avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
+        avctx->color_trc       != AVCOL_TRC_UNSPECIFIED ||
+        avctx->colorspace      != AVCOL_SPC_UNSPECIFIED)
+        vui->colour_description_present_flag = 1;
+    if (avctx->color_range     != AVCOL_RANGE_UNSPECIFIED ||
+        vui->colour_description_present_flag)
+        vui->video_signal_type_present_flag = 1;
+
+    if (avctx->chroma_sample_location != AVCHROMA_LOC_UNSPECIFIED) {
+        vui->chroma_loc_info_present_flag = 1;
+        vui->chroma_sample_loc_type_top_field    =
+        vui->chroma_sample_loc_type_bottom_field =
+            avctx->chroma_sample_location - 1;
+    }
+
+    vui->vui_timing_info_present_flag        = 1;
+    vui->vui_num_units_in_tick               = vps->vps_num_units_in_tick;
+    vui->vui_time_scale                      = vps->vps_time_scale;
+    vui->vui_poc_proportional_to_timing_flag = vps->vps_poc_proportional_to_timing_flag;
+    vui->vui_num_ticks_poc_diff_one_minus1   = vps->vps_num_ticks_poc_diff_one_minus1;
+    vui->vui_hrd_parameters_present_flag     = 0;
+
+    vui->bitstream_restriction_flag    = 1;
+    vui->motion_vectors_over_pic_boundaries_flag = 1;
+    vui->restricted_ref_pic_lists_flag = 1;
+    vui->max_bytes_per_pic_denom       = 0;
+    vui->max_bits_per_min_cu_denom     = 0;
+    vui->log2_max_mv_length_horizontal = 15;
+    vui->log2_max_mv_length_vertical   = 15;
+
+
+    // PPS
+
+    pps->nal_unit_header = (H265RawNALUnitHeader) {
+        .nal_unit_type         = HEVC_NAL_PPS,
+        .nuh_layer_id          = 0,
+        .nuh_temporal_id_plus1 = 1,
+    };
+
+    pps->pps_pic_parameter_set_id = 0;
+    pps->pps_seq_parameter_set_id = sps->sps_seq_parameter_set_id;
+
+    pps->num_ref_idx_l0_default_active_minus1 = 0;
+    pps->num_ref_idx_l1_default_active_minus1 = 0;
+
+    pps->init_qp_minus26 = opts->fixed_qp_idr - 26;
+
+    pps->cu_qp_delta_enabled_flag = opts->cu_qp_delta_enabled_flag;
+    pps->diff_cu_qp_delta_depth   = 0;
+
+    if (opts->tile_rows && opts->tile_cols) {
+        int uniform_spacing;
+
+        pps->tiles_enabled_flag      = 1;
+        pps->num_tile_columns_minus1 = opts->tile_cols - 1;
+        pps->num_tile_rows_minus1    = opts->tile_rows - 1;
+
+        // Test whether the spacing provided matches the H.265 uniform
+        // spacing, and set the flag if it does.
+        uniform_spacing = 1;
+        for (i = 0; i <= pps->num_tile_columns_minus1 &&
+                    uniform_spacing; i++) {
+            if (opts->col_width[i] !=
+                (i + 1) * opts->slice_block_cols / opts->tile_cols -
+                 i      * opts->slice_block_cols / opts->tile_cols)
+                uniform_spacing = 0;
+        }
+        for (i = 0; i <= pps->num_tile_rows_minus1 &&
+                    uniform_spacing; i++) {
+            if (opts->row_height[i] !=
+                (i + 1) * opts->slice_block_rows / opts->tile_rows -
+                 i      * opts->slice_block_rows / opts->tile_rows)
+                uniform_spacing = 0;
+        }
+        pps->uniform_spacing_flag = uniform_spacing;
+
+        for (i = 0; i <= pps->num_tile_columns_minus1; i++)
+            pps->column_width_minus1[i] = opts->col_width[i] - 1;
+        for (i = 0; i <= pps->num_tile_rows_minus1; i++)
+            pps->row_height_minus1[i]   = opts->row_height[i] - 1;
+
+        pps->loop_filter_across_tiles_enabled_flag = 1;
+    }
+
+    pps->pps_loop_filter_across_slices_enabled_flag = 1;
+
+    return 0;
+}
diff --git a/libavcodec/hw_base_encode_h265.h b/libavcodec/hw_base_encode_h265.h
new file mode 100644
index 0000000000..468f91c9b6
--- /dev/null
+++ b/libavcodec/hw_base_encode_h265.h
@@ -0,0 +1,56 @@ 
+/*
+ * 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
+ */
+
+#ifndef AVCODEC_HW_BASE_ENCODE_H265_H
+#define AVCODEC_HW_BASE_ENCODE_H265_H
+
+#include "hw_base_encode.h"
+#include "cbs_h265.h"
+
+typedef struct FFHWBaseEncodeH265 {
+    H265RawVPS raw_vps;
+    H265RawSPS raw_sps;
+    H265RawPPS raw_pps;
+
+    int dpb_frames;
+} FFHWBaseEncodeH265;
+
+typedef struct FFHWBaseEncodeH265Opts {
+    int tier;
+    int fixed_qp_idr;
+    int cu_qp_delta_enabled_flag;
+
+    int tile_rows;
+    int tile_cols;
+
+    int nb_slices;
+    int slice_block_rows;
+    int slice_block_cols;
+
+    // Tile width of the i-th column.
+    int col_width[22];
+    // Tile height of i-th row.
+    int row_height[22];
+} FFHWBaseEncodeH265Opts;
+
+int ff_hw_base_encode_init_params_h265(FFHWBaseEncodeContext *base_ctx,
+                                       AVCodecContext *avctx,
+                                       FFHWBaseEncodeH265 *common,
+                                       FFHWBaseEncodeH265Opts *opts);
+
+#endif /* AVCODEC_HW_BASE_ENCODE_H265_H */