mirror of
https://github.com/LizardByte/Sunshine.git
synced 2024-11-18 11:10:04 +00:00
300 lines
8.8 KiB
C++
300 lines
8.8 KiB
C++
extern "C" {
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#include <cbs/cbs_h264.h>
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#include <cbs/cbs_h265.h>
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#include <cbs/video_levels.h>
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#include <libavcodec/avcodec.h>
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#include <libavutil/pixdesc.h>
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}
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#include "cbs.h"
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#include "main.h"
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#include "utility.h"
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using namespace std::literals;
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namespace cbs {
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void close(CodedBitstreamContext *c) {
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ff_cbs_close(&c);
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}
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using ctx_t = util::safe_ptr<CodedBitstreamContext, close>;
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class frag_t : public CodedBitstreamFragment {
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public:
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frag_t(frag_t &&o) {
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std::copy((std::uint8_t *)&o, (std::uint8_t *)(&o + 1), (std::uint8_t *)this);
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o.data = nullptr;
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o.units = nullptr;
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};
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frag_t() {
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std::fill_n((std::uint8_t *)this, sizeof(*this), 0);
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}
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frag_t &operator=(frag_t &&o) {
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std::copy((std::uint8_t *)&o, (std::uint8_t *)(&o + 1), (std::uint8_t *)this);
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o.data = nullptr;
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o.units = nullptr;
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return *this;
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};
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~frag_t() {
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if(data || units) {
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ff_cbs_fragment_free(this);
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}
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}
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};
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util::buffer_t<std::uint8_t> write(const cbs::ctx_t &cbs_ctx, std::uint8_t nal, void *uh, AVCodecID codec_id) {
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cbs::frag_t frag;
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auto err = ff_cbs_insert_unit_content(&frag, -1, nal, uh, nullptr);
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if(err < 0) {
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char err_str[AV_ERROR_MAX_STRING_SIZE] { 0 };
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BOOST_LOG(error) << "Could not insert NAL unit SPS: "sv << av_make_error_string(err_str, AV_ERROR_MAX_STRING_SIZE, err);
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return {};
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}
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err = ff_cbs_write_fragment_data(cbs_ctx.get(), &frag);
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if(err < 0) {
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char err_str[AV_ERROR_MAX_STRING_SIZE] { 0 };
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BOOST_LOG(error) << "Could not write fragment data: "sv << av_make_error_string(err_str, AV_ERROR_MAX_STRING_SIZE, err);
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return {};
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}
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// frag.data_size * 8 - frag.data_bit_padding == bits in fragment
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util::buffer_t<std::uint8_t> data { frag.data_size };
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std::copy_n(frag.data, frag.data_size, std::begin(data));
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return data;
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}
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util::buffer_t<std::uint8_t> write(std::uint8_t nal, void *uh, AVCodecID codec_id) {
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cbs::ctx_t cbs_ctx;
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ff_cbs_init(&cbs_ctx, codec_id, nullptr);
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return write(cbs_ctx, nal, uh, codec_id);
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}
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util::buffer_t<std::uint8_t> make_sps_h264(const AVCodecContext *ctx) {
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H264RawSPS sps {};
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/* b_per_p == ctx->max_b_frames for h264 */
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/* desired_b_depth == avoption("b_depth") == 1 */
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/* max_b_depth == std::min(av_log2(ctx->b_per_p) + 1, desired_b_depth) ==> 1 */
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auto max_b_depth = 1;
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auto dpb_frame = ctx->gop_size == 1 ? 0 : 1 + max_b_depth;
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auto mb_width = (FFALIGN(ctx->width, 16) / 16) * 16;
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auto mb_height = (FFALIGN(ctx->height, 16) / 16) * 16;
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sps.nal_unit_header.nal_ref_idc = 3;
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sps.nal_unit_header.nal_unit_type = H264_NAL_SPS;
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sps.profile_idc = FF_PROFILE_H264_HIGH & 0xFF;
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sps.constraint_set1_flag = 1;
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if(ctx->level != FF_LEVEL_UNKNOWN) {
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sps.level_idc = ctx->level;
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}
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else {
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auto framerate = ctx->framerate;
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auto level = ff_h264_guess_level(
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sps.profile_idc,
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ctx->bit_rate,
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framerate.num / framerate.den,
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mb_width,
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mb_height,
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dpb_frame);
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if(!level) {
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BOOST_LOG(error) << "Could not guess h264 level"sv;
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return {};
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}
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sps.level_idc = level->level_idc;
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}
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sps.seq_parameter_set_id = 0;
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sps.chroma_format_idc = 1;
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sps.log2_max_frame_num_minus4 = 3; //4;
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sps.pic_order_cnt_type = 0;
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sps.log2_max_pic_order_cnt_lsb_minus4 = 0; //4;
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sps.max_num_ref_frames = dpb_frame;
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sps.pic_width_in_mbs_minus1 = mb_width / 16 - 1;
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sps.pic_height_in_map_units_minus1 = mb_height / 16 - 1;
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sps.frame_mbs_only_flag = 1;
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sps.direct_8x8_inference_flag = 1;
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if(ctx->width != mb_width || ctx->height != mb_height) {
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sps.frame_cropping_flag = 1;
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sps.frame_crop_left_offset = 0;
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sps.frame_crop_top_offset = 0;
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sps.frame_crop_right_offset = (mb_width - ctx->width) / 2;
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sps.frame_crop_bottom_offset = (mb_height - ctx->height) / 2;
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}
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sps.vui_parameters_present_flag = 1;
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auto &vui = sps.vui;
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vui.video_format = 5;
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vui.colour_description_present_flag = 1;
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vui.video_signal_type_present_flag = 1;
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vui.video_full_range_flag = ctx->color_range == AVCOL_RANGE_JPEG;
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vui.colour_primaries = ctx->color_primaries;
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vui.transfer_characteristics = ctx->color_trc;
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vui.matrix_coefficients = ctx->colorspace;
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vui.low_delay_hrd_flag = 1 - vui.fixed_frame_rate_flag;
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vui.bitstream_restriction_flag = 1;
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vui.motion_vectors_over_pic_boundaries_flag = 1;
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vui.log2_max_mv_length_horizontal = 15;
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vui.log2_max_mv_length_vertical = 15;
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vui.max_num_reorder_frames = max_b_depth;
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vui.max_dec_frame_buffering = max_b_depth + 1;
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return write(sps.nal_unit_header.nal_unit_type, (void *)&sps.nal_unit_header, AV_CODEC_ID_H264);
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}
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hevc_t make_sps_hevc(const AVCodecContext *avctx, const AVPacket *packet) {
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cbs::ctx_t ctx;
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if(ff_cbs_init(&ctx, AV_CODEC_ID_H265, nullptr)) {
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return {};
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}
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cbs::frag_t frag;
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int err = ff_cbs_read_packet(ctx.get(), &frag, packet);
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if(err < 0) {
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char err_str[AV_ERROR_MAX_STRING_SIZE] { 0 };
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BOOST_LOG(error) << "Couldn't read packet: "sv << av_make_error_string(err_str, AV_ERROR_MAX_STRING_SIZE, err);
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return {};
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}
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auto vps_p = ((CodedBitstreamH265Context *)ctx->priv_data)->active_vps;
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auto sps_p = ((CodedBitstreamH265Context *)ctx->priv_data)->active_sps;
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H265RawSPS sps { *sps_p };
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H265RawVPS vps { *vps_p };
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vps.profile_tier_level.general_profile_compatibility_flag[4] = 1;
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sps.profile_tier_level.general_profile_compatibility_flag[4] = 1;
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auto &vui = sps.vui;
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std::memset(&vui, 0, sizeof(vui));
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sps.vui_parameters_present_flag = 1;
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// skip sample aspect ratio
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vui.video_format = 5;
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vui.colour_description_present_flag = 1;
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vui.video_signal_type_present_flag = 1;
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vui.video_full_range_flag = avctx->color_range == AVCOL_RANGE_JPEG;
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vui.colour_primaries = avctx->color_primaries;
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vui.transfer_characteristics = avctx->color_trc;
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vui.matrix_coefficients = avctx->colorspace;
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vui.vui_timing_info_present_flag = vps.vps_timing_info_present_flag;
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vui.vui_num_units_in_tick = vps.vps_num_units_in_tick;
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vui.vui_time_scale = vps.vps_time_scale;
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vui.vui_poc_proportional_to_timing_flag = vps.vps_poc_proportional_to_timing_flag;
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vui.vui_num_ticks_poc_diff_one_minus1 = vps.vps_num_ticks_poc_diff_one_minus1;
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vui.vui_hrd_parameters_present_flag = 0;
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vui.bitstream_restriction_flag = 1;
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vui.motion_vectors_over_pic_boundaries_flag = 1;
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vui.restricted_ref_pic_lists_flag = 1;
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vui.max_bytes_per_pic_denom = 0;
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vui.max_bits_per_min_cu_denom = 0;
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vui.log2_max_mv_length_horizontal = 15;
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vui.log2_max_mv_length_vertical = 15;
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cbs::ctx_t write_ctx;
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ff_cbs_init(&write_ctx, AV_CODEC_ID_H265, nullptr);
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return hevc_t {
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nal_t {
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write(write_ctx, vps.nal_unit_header.nal_unit_type, (void *)&vps.nal_unit_header, AV_CODEC_ID_H265),
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write(ctx, vps_p->nal_unit_header.nal_unit_type, (void *)&vps_p->nal_unit_header, AV_CODEC_ID_H265),
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},
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nal_t {
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write(write_ctx, sps.nal_unit_header.nal_unit_type, (void *)&sps.nal_unit_header, AV_CODEC_ID_H265),
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write(ctx, sps_p->nal_unit_header.nal_unit_type, (void *)&sps_p->nal_unit_header, AV_CODEC_ID_H265),
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},
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};
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}
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util::buffer_t<std::uint8_t> read_sps_h264(const AVPacket *packet) {
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cbs::ctx_t ctx;
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if(ff_cbs_init(&ctx, AV_CODEC_ID_H264, nullptr)) {
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return {};
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}
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cbs::frag_t frag;
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int err = ff_cbs_read_packet(ctx.get(), &frag, &*packet);
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if(err < 0) {
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char err_str[AV_ERROR_MAX_STRING_SIZE] { 0 };
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BOOST_LOG(error) << "Couldn't read packet: "sv << av_make_error_string(err_str, AV_ERROR_MAX_STRING_SIZE, err);
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return {};
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}
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auto h264 = (H264RawNALUnitHeader *)((CodedBitstreamH264Context *)ctx->priv_data)->active_sps;
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return write(h264->nal_unit_type, (void *)h264, AV_CODEC_ID_H264);
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}
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h264_t make_sps_h264(const AVCodecContext *ctx, const AVPacket *packet) {
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return h264_t {
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make_sps_h264(ctx),
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read_sps_h264(packet),
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};
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}
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bool validate_sps(const AVPacket *packet, int codec_id) {
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cbs::ctx_t ctx;
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if(ff_cbs_init(&ctx, (AVCodecID)codec_id, nullptr)) {
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return false;
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}
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cbs::frag_t frag;
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int err = ff_cbs_read_packet(ctx.get(), &frag, packet);
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if(err < 0) {
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char err_str[AV_ERROR_MAX_STRING_SIZE] { 0 };
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BOOST_LOG(error) << "Couldn't read packet: "sv << av_make_error_string(err_str, AV_ERROR_MAX_STRING_SIZE, err);
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return false;
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}
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if(codec_id == AV_CODEC_ID_H264) {
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auto h264 = (CodedBitstreamH264Context *)ctx->priv_data;
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if(!h264->active_sps->vui_parameters_present_flag) {
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return false;
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}
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return true;
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}
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return ((CodedBitstreamH265Context *)ctx->priv_data)->active_sps->vui_parameters_present_flag;
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}
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} // namespace cbs
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