From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- drivers/media/platform/allegro-dvt/nal-h264.c | 605 ++++++++++++++++++++++++++ 1 file changed, 605 insertions(+) create mode 100644 drivers/media/platform/allegro-dvt/nal-h264.c (limited to 'drivers/media/platform/allegro-dvt/nal-h264.c') diff --git a/drivers/media/platform/allegro-dvt/nal-h264.c b/drivers/media/platform/allegro-dvt/nal-h264.c new file mode 100644 index 000000000..326637663 --- /dev/null +++ b/drivers/media/platform/allegro-dvt/nal-h264.c @@ -0,0 +1,605 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 Pengutronix, Michael Tretter + * + * Convert NAL units between raw byte sequence payloads (RBSP) and C structs + * + * The conversion is defined in "ITU-T Rec. H.264 (04/2017) Advanced video + * coding for generic audiovisual services". Decoder drivers may use the + * parser to parse RBSP from encoded streams and configure the hardware, if + * the hardware is not able to parse RBSP itself. Encoder drivers may use the + * generator to generate the RBSP for SPS/PPS nal units and add them to the + * encoded stream if the hardware does not generate the units. + */ + +#include +#include +#include +#include + +#include +#include +#include + +#include "nal-h264.h" +#include "nal-rbsp.h" + +/* + * See Rec. ITU-T H.264 (04/2017) Table 7-1 - NAL unit type codes, syntax + * element categories, and NAL unit type classes + */ +enum nal_unit_type { + SEQUENCE_PARAMETER_SET = 7, + PICTURE_PARAMETER_SET = 8, + FILLER_DATA = 12, +}; + +static void nal_h264_write_start_code_prefix(struct rbsp *rbsp) +{ + u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8); + int i = 4; + + if (DIV_ROUND_UP(rbsp->pos, 8) + i > rbsp->size) { + rbsp->error = -EINVAL; + return; + } + + p[0] = 0x00; + p[1] = 0x00; + p[2] = 0x00; + p[3] = 0x01; + + rbsp->pos += i * 8; +} + +static void nal_h264_read_start_code_prefix(struct rbsp *rbsp) +{ + u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8); + int i = 4; + + if (DIV_ROUND_UP(rbsp->pos, 8) + i > rbsp->size) { + rbsp->error = -EINVAL; + return; + } + + if (p[0] != 0x00 || p[1] != 0x00 || p[2] != 0x00 || p[3] != 0x01) { + rbsp->error = -EINVAL; + return; + } + + rbsp->pos += i * 8; +} + +static void nal_h264_write_filler_data(struct rbsp *rbsp) +{ + u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8); + int i; + + /* Keep 1 byte extra for terminating the NAL unit */ + i = rbsp->size - DIV_ROUND_UP(rbsp->pos, 8) - 1; + memset(p, 0xff, i); + rbsp->pos += i * 8; +} + +static void nal_h264_read_filler_data(struct rbsp *rbsp) +{ + u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8); + + while (*p == 0xff) { + if (DIV_ROUND_UP(rbsp->pos, 8) > rbsp->size) { + rbsp->error = -EINVAL; + return; + } + + p++; + rbsp->pos += 8; + } +} + +static void nal_h264_rbsp_hrd_parameters(struct rbsp *rbsp, + struct nal_h264_hrd_parameters *hrd) +{ + unsigned int i; + + if (!hrd) { + rbsp->error = -EINVAL; + return; + } + + rbsp_uev(rbsp, &hrd->cpb_cnt_minus1); + rbsp_bits(rbsp, 4, &hrd->bit_rate_scale); + rbsp_bits(rbsp, 4, &hrd->cpb_size_scale); + + for (i = 0; i <= hrd->cpb_cnt_minus1; i++) { + rbsp_uev(rbsp, &hrd->bit_rate_value_minus1[i]); + rbsp_uev(rbsp, &hrd->cpb_size_value_minus1[i]); + rbsp_bit(rbsp, &hrd->cbr_flag[i]); + } + + rbsp_bits(rbsp, 5, &hrd->initial_cpb_removal_delay_length_minus1); + rbsp_bits(rbsp, 5, &hrd->cpb_removal_delay_length_minus1); + rbsp_bits(rbsp, 5, &hrd->dpb_output_delay_length_minus1); + rbsp_bits(rbsp, 5, &hrd->time_offset_length); +} + +static void nal_h264_rbsp_vui_parameters(struct rbsp *rbsp, + struct nal_h264_vui_parameters *vui) +{ + if (!vui) { + rbsp->error = -EINVAL; + return; + } + + rbsp_bit(rbsp, &vui->aspect_ratio_info_present_flag); + if (vui->aspect_ratio_info_present_flag) { + rbsp_bits(rbsp, 8, &vui->aspect_ratio_idc); + if (vui->aspect_ratio_idc == 255) { + rbsp_bits(rbsp, 16, &vui->sar_width); + rbsp_bits(rbsp, 16, &vui->sar_height); + } + } + + rbsp_bit(rbsp, &vui->overscan_info_present_flag); + if (vui->overscan_info_present_flag) + rbsp_bit(rbsp, &vui->overscan_appropriate_flag); + + rbsp_bit(rbsp, &vui->video_signal_type_present_flag); + if (vui->video_signal_type_present_flag) { + rbsp_bits(rbsp, 3, &vui->video_format); + rbsp_bit(rbsp, &vui->video_full_range_flag); + + rbsp_bit(rbsp, &vui->colour_description_present_flag); + if (vui->colour_description_present_flag) { + rbsp_bits(rbsp, 8, &vui->colour_primaries); + rbsp_bits(rbsp, 8, &vui->transfer_characteristics); + rbsp_bits(rbsp, 8, &vui->matrix_coefficients); + } + } + + rbsp_bit(rbsp, &vui->chroma_loc_info_present_flag); + if (vui->chroma_loc_info_present_flag) { + rbsp_uev(rbsp, &vui->chroma_sample_loc_type_top_field); + rbsp_uev(rbsp, &vui->chroma_sample_loc_type_bottom_field); + } + + rbsp_bit(rbsp, &vui->timing_info_present_flag); + if (vui->timing_info_present_flag) { + rbsp_bits(rbsp, 32, &vui->num_units_in_tick); + rbsp_bits(rbsp, 32, &vui->time_scale); + rbsp_bit(rbsp, &vui->fixed_frame_rate_flag); + } + + rbsp_bit(rbsp, &vui->nal_hrd_parameters_present_flag); + if (vui->nal_hrd_parameters_present_flag) + nal_h264_rbsp_hrd_parameters(rbsp, &vui->nal_hrd_parameters); + + rbsp_bit(rbsp, &vui->vcl_hrd_parameters_present_flag); + if (vui->vcl_hrd_parameters_present_flag) + nal_h264_rbsp_hrd_parameters(rbsp, &vui->vcl_hrd_parameters); + + if (vui->nal_hrd_parameters_present_flag || + vui->vcl_hrd_parameters_present_flag) + rbsp_bit(rbsp, &vui->low_delay_hrd_flag); + + rbsp_bit(rbsp, &vui->pic_struct_present_flag); + + rbsp_bit(rbsp, &vui->bitstream_restriction_flag); + if (vui->bitstream_restriction_flag) { + rbsp_bit(rbsp, &vui->motion_vectors_over_pic_boundaries_flag); + rbsp_uev(rbsp, &vui->max_bytes_per_pic_denom); + rbsp_uev(rbsp, &vui->max_bits_per_mb_denom); + rbsp_uev(rbsp, &vui->log2_max_mv_length_horizontal); + rbsp_uev(rbsp, &vui->log21_max_mv_length_vertical); + rbsp_uev(rbsp, &vui->max_num_reorder_frames); + rbsp_uev(rbsp, &vui->max_dec_frame_buffering); + } +} + +static void nal_h264_rbsp_sps(struct rbsp *rbsp, struct nal_h264_sps *sps) +{ + unsigned int i; + + if (!sps) { + rbsp->error = -EINVAL; + return; + } + + rbsp_bits(rbsp, 8, &sps->profile_idc); + rbsp_bit(rbsp, &sps->constraint_set0_flag); + rbsp_bit(rbsp, &sps->constraint_set1_flag); + rbsp_bit(rbsp, &sps->constraint_set2_flag); + rbsp_bit(rbsp, &sps->constraint_set3_flag); + rbsp_bit(rbsp, &sps->constraint_set4_flag); + rbsp_bit(rbsp, &sps->constraint_set5_flag); + rbsp_bits(rbsp, 2, &sps->reserved_zero_2bits); + rbsp_bits(rbsp, 8, &sps->level_idc); + + rbsp_uev(rbsp, &sps->seq_parameter_set_id); + + if (sps->profile_idc == 100 || sps->profile_idc == 110 || + sps->profile_idc == 122 || sps->profile_idc == 244 || + sps->profile_idc == 44 || sps->profile_idc == 83 || + sps->profile_idc == 86 || sps->profile_idc == 118 || + sps->profile_idc == 128 || sps->profile_idc == 138 || + sps->profile_idc == 139 || sps->profile_idc == 134 || + sps->profile_idc == 135) { + rbsp_uev(rbsp, &sps->chroma_format_idc); + + if (sps->chroma_format_idc == 3) + rbsp_bit(rbsp, &sps->separate_colour_plane_flag); + rbsp_uev(rbsp, &sps->bit_depth_luma_minus8); + rbsp_uev(rbsp, &sps->bit_depth_chroma_minus8); + rbsp_bit(rbsp, &sps->qpprime_y_zero_transform_bypass_flag); + rbsp_bit(rbsp, &sps->seq_scaling_matrix_present_flag); + if (sps->seq_scaling_matrix_present_flag) + rbsp->error = -EINVAL; + } + + rbsp_uev(rbsp, &sps->log2_max_frame_num_minus4); + + rbsp_uev(rbsp, &sps->pic_order_cnt_type); + switch (sps->pic_order_cnt_type) { + case 0: + rbsp_uev(rbsp, &sps->log2_max_pic_order_cnt_lsb_minus4); + break; + case 1: + rbsp_bit(rbsp, &sps->delta_pic_order_always_zero_flag); + rbsp_sev(rbsp, &sps->offset_for_non_ref_pic); + rbsp_sev(rbsp, &sps->offset_for_top_to_bottom_field); + + rbsp_uev(rbsp, &sps->num_ref_frames_in_pic_order_cnt_cycle); + for (i = 0; i < sps->num_ref_frames_in_pic_order_cnt_cycle; i++) + rbsp_sev(rbsp, &sps->offset_for_ref_frame[i]); + break; + default: + rbsp->error = -EINVAL; + break; + } + + rbsp_uev(rbsp, &sps->max_num_ref_frames); + rbsp_bit(rbsp, &sps->gaps_in_frame_num_value_allowed_flag); + rbsp_uev(rbsp, &sps->pic_width_in_mbs_minus1); + rbsp_uev(rbsp, &sps->pic_height_in_map_units_minus1); + + rbsp_bit(rbsp, &sps->frame_mbs_only_flag); + if (!sps->frame_mbs_only_flag) + rbsp_bit(rbsp, &sps->mb_adaptive_frame_field_flag); + + rbsp_bit(rbsp, &sps->direct_8x8_inference_flag); + + rbsp_bit(rbsp, &sps->frame_cropping_flag); + if (sps->frame_cropping_flag) { + rbsp_uev(rbsp, &sps->crop_left); + rbsp_uev(rbsp, &sps->crop_right); + rbsp_uev(rbsp, &sps->crop_top); + rbsp_uev(rbsp, &sps->crop_bottom); + } + + rbsp_bit(rbsp, &sps->vui_parameters_present_flag); + if (sps->vui_parameters_present_flag) + nal_h264_rbsp_vui_parameters(rbsp, &sps->vui); +} + +static void nal_h264_rbsp_pps(struct rbsp *rbsp, struct nal_h264_pps *pps) +{ + int i; + + rbsp_uev(rbsp, &pps->pic_parameter_set_id); + rbsp_uev(rbsp, &pps->seq_parameter_set_id); + rbsp_bit(rbsp, &pps->entropy_coding_mode_flag); + rbsp_bit(rbsp, &pps->bottom_field_pic_order_in_frame_present_flag); + rbsp_uev(rbsp, &pps->num_slice_groups_minus1); + if (pps->num_slice_groups_minus1 > 0) { + rbsp_uev(rbsp, &pps->slice_group_map_type); + switch (pps->slice_group_map_type) { + case 0: + for (i = 0; i < pps->num_slice_groups_minus1; i++) + rbsp_uev(rbsp, &pps->run_length_minus1[i]); + break; + case 2: + for (i = 0; i < pps->num_slice_groups_minus1; i++) { + rbsp_uev(rbsp, &pps->top_left[i]); + rbsp_uev(rbsp, &pps->bottom_right[i]); + } + break; + case 3: case 4: case 5: + rbsp_bit(rbsp, &pps->slice_group_change_direction_flag); + rbsp_uev(rbsp, &pps->slice_group_change_rate_minus1); + break; + case 6: + rbsp_uev(rbsp, &pps->pic_size_in_map_units_minus1); + for (i = 0; i < pps->pic_size_in_map_units_minus1; i++) + rbsp_bits(rbsp, + order_base_2(pps->num_slice_groups_minus1 + 1), + &pps->slice_group_id[i]); + break; + default: + break; + } + } + rbsp_uev(rbsp, &pps->num_ref_idx_l0_default_active_minus1); + rbsp_uev(rbsp, &pps->num_ref_idx_l1_default_active_minus1); + rbsp_bit(rbsp, &pps->weighted_pred_flag); + rbsp_bits(rbsp, 2, &pps->weighted_bipred_idc); + rbsp_sev(rbsp, &pps->pic_init_qp_minus26); + rbsp_sev(rbsp, &pps->pic_init_qs_minus26); + rbsp_sev(rbsp, &pps->chroma_qp_index_offset); + rbsp_bit(rbsp, &pps->deblocking_filter_control_present_flag); + rbsp_bit(rbsp, &pps->constrained_intra_pred_flag); + rbsp_bit(rbsp, &pps->redundant_pic_cnt_present_flag); + if (/* more_rbsp_data() */ false) { + rbsp_bit(rbsp, &pps->transform_8x8_mode_flag); + rbsp_bit(rbsp, &pps->pic_scaling_matrix_present_flag); + if (pps->pic_scaling_matrix_present_flag) + rbsp->error = -EINVAL; + rbsp_sev(rbsp, &pps->second_chroma_qp_index_offset); + } +} + +/** + * nal_h264_write_sps() - Write SPS NAL unit into RBSP format + * @dev: device pointer + * @dest: the buffer that is filled with RBSP data + * @n: maximum size of @dest in bytes + * @sps: &struct nal_h264_sps to convert to RBSP + * + * Convert @sps to RBSP data and write it into @dest. + * + * The size of the SPS NAL unit is not known in advance and this function will + * fail, if @dest does not hold sufficient space for the SPS NAL unit. + * + * Return: number of bytes written to @dest or negative error code + */ +ssize_t nal_h264_write_sps(const struct device *dev, + void *dest, size_t n, struct nal_h264_sps *sps) +{ + struct rbsp rbsp; + unsigned int forbidden_zero_bit = 0; + unsigned int nal_ref_idc = 0; + unsigned int nal_unit_type = SEQUENCE_PARAMETER_SET; + + if (!dest) + return -EINVAL; + + rbsp_init(&rbsp, dest, n, &write); + + nal_h264_write_start_code_prefix(&rbsp); + + rbsp_bit(&rbsp, &forbidden_zero_bit); + rbsp_bits(&rbsp, 2, &nal_ref_idc); + rbsp_bits(&rbsp, 5, &nal_unit_type); + + nal_h264_rbsp_sps(&rbsp, sps); + + rbsp_trailing_bits(&rbsp); + + if (rbsp.error) + return rbsp.error; + + return DIV_ROUND_UP(rbsp.pos, 8); +} +EXPORT_SYMBOL_GPL(nal_h264_write_sps); + +/** + * nal_h264_read_sps() - Read SPS NAL unit from RBSP format + * @dev: device pointer + * @sps: the &struct nal_h264_sps to fill from the RBSP data + * @src: the buffer that contains the RBSP data + * @n: size of @src in bytes + * + * Read RBSP data from @src and use it to fill @sps. + * + * Return: number of bytes read from @src or negative error code + */ +ssize_t nal_h264_read_sps(const struct device *dev, + struct nal_h264_sps *sps, void *src, size_t n) +{ + struct rbsp rbsp; + unsigned int forbidden_zero_bit; + unsigned int nal_ref_idc; + unsigned int nal_unit_type; + + if (!src) + return -EINVAL; + + rbsp_init(&rbsp, src, n, &read); + + nal_h264_read_start_code_prefix(&rbsp); + + rbsp_bit(&rbsp, &forbidden_zero_bit); + rbsp_bits(&rbsp, 2, &nal_ref_idc); + rbsp_bits(&rbsp, 5, &nal_unit_type); + + if (rbsp.error || + forbidden_zero_bit != 0 || + nal_ref_idc != 0 || + nal_unit_type != SEQUENCE_PARAMETER_SET) + return -EINVAL; + + nal_h264_rbsp_sps(&rbsp, sps); + + rbsp_trailing_bits(&rbsp); + + if (rbsp.error) + return rbsp.error; + + return DIV_ROUND_UP(rbsp.pos, 8); +} +EXPORT_SYMBOL_GPL(nal_h264_read_sps); + +/** + * nal_h264_write_pps() - Write PPS NAL unit into RBSP format + * @dev: device pointer + * @dest: the buffer that is filled with RBSP data + * @n: maximum size of @dest in bytes + * @pps: &struct nal_h264_pps to convert to RBSP + * + * Convert @pps to RBSP data and write it into @dest. + * + * The size of the PPS NAL unit is not known in advance and this function will + * fail, if @dest does not hold sufficient space for the PPS NAL unit. + * + * Return: number of bytes written to @dest or negative error code + */ +ssize_t nal_h264_write_pps(const struct device *dev, + void *dest, size_t n, struct nal_h264_pps *pps) +{ + struct rbsp rbsp; + unsigned int forbidden_zero_bit = 0; + unsigned int nal_ref_idc = 0; + unsigned int nal_unit_type = PICTURE_PARAMETER_SET; + + if (!dest) + return -EINVAL; + + rbsp_init(&rbsp, dest, n, &write); + + nal_h264_write_start_code_prefix(&rbsp); + + /* NAL unit header */ + rbsp_bit(&rbsp, &forbidden_zero_bit); + rbsp_bits(&rbsp, 2, &nal_ref_idc); + rbsp_bits(&rbsp, 5, &nal_unit_type); + + nal_h264_rbsp_pps(&rbsp, pps); + + rbsp_trailing_bits(&rbsp); + + if (rbsp.error) + return rbsp.error; + + return DIV_ROUND_UP(rbsp.pos, 8); +} +EXPORT_SYMBOL_GPL(nal_h264_write_pps); + +/** + * nal_h264_read_pps() - Read PPS NAL unit from RBSP format + * @dev: device pointer + * @pps: the &struct nal_h264_pps to fill from the RBSP data + * @src: the buffer that contains the RBSP data + * @n: size of @src in bytes + * + * Read RBSP data from @src and use it to fill @pps. + * + * Return: number of bytes read from @src or negative error code + */ +ssize_t nal_h264_read_pps(const struct device *dev, + struct nal_h264_pps *pps, void *src, size_t n) +{ + struct rbsp rbsp; + + if (!src) + return -EINVAL; + + rbsp_init(&rbsp, src, n, &read); + + nal_h264_read_start_code_prefix(&rbsp); + + /* NAL unit header */ + rbsp.pos += 8; + + nal_h264_rbsp_pps(&rbsp, pps); + + rbsp_trailing_bits(&rbsp); + + if (rbsp.error) + return rbsp.error; + + return DIV_ROUND_UP(rbsp.pos, 8); +} +EXPORT_SYMBOL_GPL(nal_h264_read_pps); + +/** + * nal_h264_write_filler() - Write filler data RBSP + * @dev: device pointer + * @dest: buffer to fill with filler data + * @n: size of the buffer to fill with filler data + * + * Write a filler data RBSP to @dest with a size of @n bytes and return the + * number of written filler data bytes. + * + * Use this function to generate dummy data in an RBSP data stream that can be + * safely ignored by h264 decoders. + * + * The RBSP format of the filler data is specified in Rec. ITU-T H.264 + * (04/2017) 7.3.2.7 Filler data RBSP syntax. + * + * Return: number of filler data bytes (including marker) or negative error + */ +ssize_t nal_h264_write_filler(const struct device *dev, void *dest, size_t n) +{ + struct rbsp rbsp; + unsigned int forbidden_zero_bit = 0; + unsigned int nal_ref_idc = 0; + unsigned int nal_unit_type = FILLER_DATA; + + if (!dest) + return -EINVAL; + + rbsp_init(&rbsp, dest, n, &write); + + nal_h264_write_start_code_prefix(&rbsp); + + rbsp_bit(&rbsp, &forbidden_zero_bit); + rbsp_bits(&rbsp, 2, &nal_ref_idc); + rbsp_bits(&rbsp, 5, &nal_unit_type); + + nal_h264_write_filler_data(&rbsp); + + rbsp_trailing_bits(&rbsp); + + return DIV_ROUND_UP(rbsp.pos, 8); +} +EXPORT_SYMBOL_GPL(nal_h264_write_filler); + +/** + * nal_h264_read_filler() - Read filler data RBSP + * @dev: device pointer + * @src: buffer with RBSP data that is read + * @n: maximum size of src that shall be read + * + * Read a filler data RBSP from @src up to a maximum size of @n bytes and + * return the size of the filler data in bytes including the marker. + * + * This function is used to parse filler data and skip the respective bytes in + * the RBSP data. + * + * The RBSP format of the filler data is specified in Rec. ITU-T H.264 + * (04/2017) 7.3.2.7 Filler data RBSP syntax. + * + * Return: number of filler data bytes (including marker) or negative error + */ +ssize_t nal_h264_read_filler(const struct device *dev, void *src, size_t n) +{ + struct rbsp rbsp; + unsigned int forbidden_zero_bit; + unsigned int nal_ref_idc; + unsigned int nal_unit_type; + + if (!src) + return -EINVAL; + + rbsp_init(&rbsp, src, n, &read); + + nal_h264_read_start_code_prefix(&rbsp); + + rbsp_bit(&rbsp, &forbidden_zero_bit); + rbsp_bits(&rbsp, 2, &nal_ref_idc); + rbsp_bits(&rbsp, 5, &nal_unit_type); + + if (rbsp.error) + return rbsp.error; + if (forbidden_zero_bit != 0 || + nal_ref_idc != 0 || + nal_unit_type != FILLER_DATA) + return -EINVAL; + + nal_h264_read_filler_data(&rbsp); + rbsp_trailing_bits(&rbsp); + + if (rbsp.error) + return rbsp.error; + + return DIV_ROUND_UP(rbsp.pos, 8); +} +EXPORT_SYMBOL_GPL(nal_h264_read_filler); -- cgit v1.2.3