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/v4l2-core/v4l2-h264.c | 449 ++++++++++++++++++++++++++++++++++++ 1 file changed, 449 insertions(+) create mode 100644 drivers/media/v4l2-core/v4l2-h264.c (limited to 'drivers/media/v4l2-core/v4l2-h264.c') diff --git a/drivers/media/v4l2-core/v4l2-h264.c b/drivers/media/v4l2-core/v4l2-h264.c new file mode 100644 index 000000000..72bd64f65 --- /dev/null +++ b/drivers/media/v4l2-core/v4l2-h264.c @@ -0,0 +1,449 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * V4L2 H264 helpers. + * + * Copyright (C) 2019 Collabora, Ltd. + * + * Author: Boris Brezillon + */ + +#include +#include + +#include + +/* + * Size of the tempory buffer allocated when printing reference lists. The + * output will be truncated if the size is too small. + */ +static const int tmp_str_size = 1024; + +/** + * v4l2_h264_init_reflist_builder() - Initialize a P/B0/B1 reference list + * builder + * + * @b: the builder context to initialize + * @dec_params: decode parameters control + * @sps: SPS control + * @dpb: DPB to use when creating the reference list + */ +void +v4l2_h264_init_reflist_builder(struct v4l2_h264_reflist_builder *b, + const struct v4l2_ctrl_h264_decode_params *dec_params, + const struct v4l2_ctrl_h264_sps *sps, + const struct v4l2_h264_dpb_entry dpb[V4L2_H264_NUM_DPB_ENTRIES]) +{ + int cur_frame_num, max_frame_num; + unsigned int i; + + max_frame_num = 1 << (sps->log2_max_frame_num_minus4 + 4); + cur_frame_num = dec_params->frame_num; + + memset(b, 0, sizeof(*b)); + if (!(dec_params->flags & V4L2_H264_DECODE_PARAM_FLAG_FIELD_PIC)) { + b->cur_pic_order_count = min(dec_params->bottom_field_order_cnt, + dec_params->top_field_order_cnt); + b->cur_pic_fields = V4L2_H264_FRAME_REF; + } else if (dec_params->flags & V4L2_H264_DECODE_PARAM_FLAG_BOTTOM_FIELD) { + b->cur_pic_order_count = dec_params->bottom_field_order_cnt; + b->cur_pic_fields = V4L2_H264_BOTTOM_FIELD_REF; + } else { + b->cur_pic_order_count = dec_params->top_field_order_cnt; + b->cur_pic_fields = V4L2_H264_TOP_FIELD_REF; + } + + for (i = 0; i < V4L2_H264_NUM_DPB_ENTRIES; i++) { + if (!(dpb[i].flags & V4L2_H264_DPB_ENTRY_FLAG_ACTIVE)) + continue; + + if (dpb[i].flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM) + b->refs[i].longterm = true; + + /* + * Handle frame_num wraparound as described in section + * '8.2.4.1 Decoding process for picture numbers' of the spec. + * For long term references, frame_num is set to + * long_term_frame_idx which requires no wrapping. + */ + if (!b->refs[i].longterm && dpb[i].frame_num > cur_frame_num) + b->refs[i].frame_num = (int)dpb[i].frame_num - + max_frame_num; + else + b->refs[i].frame_num = dpb[i].frame_num; + + b->refs[i].top_field_order_cnt = dpb[i].top_field_order_cnt; + b->refs[i].bottom_field_order_cnt = dpb[i].bottom_field_order_cnt; + + if (b->cur_pic_fields == V4L2_H264_FRAME_REF) { + u8 fields = V4L2_H264_FRAME_REF; + + b->unordered_reflist[b->num_valid].index = i; + b->unordered_reflist[b->num_valid].fields = fields; + b->num_valid++; + continue; + } + + if (dpb[i].fields & V4L2_H264_TOP_FIELD_REF) { + u8 fields = V4L2_H264_TOP_FIELD_REF; + + b->unordered_reflist[b->num_valid].index = i; + b->unordered_reflist[b->num_valid].fields = fields; + b->num_valid++; + } + + if (dpb[i].fields & V4L2_H264_BOTTOM_FIELD_REF) { + u8 fields = V4L2_H264_BOTTOM_FIELD_REF; + + b->unordered_reflist[b->num_valid].index = i; + b->unordered_reflist[b->num_valid].fields = fields; + b->num_valid++; + } + } + + for (i = b->num_valid; i < ARRAY_SIZE(b->unordered_reflist); i++) + b->unordered_reflist[i].index = i; +} +EXPORT_SYMBOL_GPL(v4l2_h264_init_reflist_builder); + +static s32 v4l2_h264_get_poc(const struct v4l2_h264_reflist_builder *b, + const struct v4l2_h264_reference *ref) +{ + switch (ref->fields) { + case V4L2_H264_FRAME_REF: + return min(b->refs[ref->index].top_field_order_cnt, + b->refs[ref->index].bottom_field_order_cnt); + case V4L2_H264_TOP_FIELD_REF: + return b->refs[ref->index].top_field_order_cnt; + case V4L2_H264_BOTTOM_FIELD_REF: + return b->refs[ref->index].bottom_field_order_cnt; + } + + /* not reached */ + return 0; +} + +static int v4l2_h264_p_ref_list_cmp(const void *ptra, const void *ptrb, + const void *data) +{ + const struct v4l2_h264_reflist_builder *builder = data; + u8 idxa, idxb; + + idxa = ((struct v4l2_h264_reference *)ptra)->index; + idxb = ((struct v4l2_h264_reference *)ptrb)->index; + + if (WARN_ON(idxa >= V4L2_H264_NUM_DPB_ENTRIES || + idxb >= V4L2_H264_NUM_DPB_ENTRIES)) + return 1; + + if (builder->refs[idxa].longterm != builder->refs[idxb].longterm) { + /* Short term pics first. */ + if (!builder->refs[idxa].longterm) + return -1; + else + return 1; + } + + /* + * For frames, short term pics are in descending pic num order and long + * term ones in ascending order. For fields, the same direction is used + * but with frame_num (wrapped). For frames, the value of pic_num and + * frame_num are the same (see formula (8-28) and (8-29)). For this + * reason we can use frame_num only and share this function between + * frames and fields reflist. + */ + if (!builder->refs[idxa].longterm) + return builder->refs[idxb].frame_num < + builder->refs[idxa].frame_num ? + -1 : 1; + + return builder->refs[idxa].frame_num < builder->refs[idxb].frame_num ? + -1 : 1; +} + +static int v4l2_h264_b0_ref_list_cmp(const void *ptra, const void *ptrb, + const void *data) +{ + const struct v4l2_h264_reflist_builder *builder = data; + s32 poca, pocb; + u8 idxa, idxb; + + idxa = ((struct v4l2_h264_reference *)ptra)->index; + idxb = ((struct v4l2_h264_reference *)ptrb)->index; + + if (WARN_ON(idxa >= V4L2_H264_NUM_DPB_ENTRIES || + idxb >= V4L2_H264_NUM_DPB_ENTRIES)) + return 1; + + if (builder->refs[idxa].longterm != builder->refs[idxb].longterm) { + /* Short term pics first. */ + if (!builder->refs[idxa].longterm) + return -1; + else + return 1; + } + + /* Long term pics in ascending frame num order. */ + if (builder->refs[idxa].longterm) + return builder->refs[idxa].frame_num < + builder->refs[idxb].frame_num ? + -1 : 1; + + poca = v4l2_h264_get_poc(builder, ptra); + pocb = v4l2_h264_get_poc(builder, ptrb); + + /* + * Short term pics with POC < cur POC first in POC descending order + * followed by short term pics with POC > cur POC in POC ascending + * order. + */ + if ((poca < builder->cur_pic_order_count) != + (pocb < builder->cur_pic_order_count)) + return poca < pocb ? -1 : 1; + else if (poca < builder->cur_pic_order_count) + return pocb < poca ? -1 : 1; + + return poca < pocb ? -1 : 1; +} + +static int v4l2_h264_b1_ref_list_cmp(const void *ptra, const void *ptrb, + const void *data) +{ + const struct v4l2_h264_reflist_builder *builder = data; + s32 poca, pocb; + u8 idxa, idxb; + + idxa = ((struct v4l2_h264_reference *)ptra)->index; + idxb = ((struct v4l2_h264_reference *)ptrb)->index; + + if (WARN_ON(idxa >= V4L2_H264_NUM_DPB_ENTRIES || + idxb >= V4L2_H264_NUM_DPB_ENTRIES)) + return 1; + + if (builder->refs[idxa].longterm != builder->refs[idxb].longterm) { + /* Short term pics first. */ + if (!builder->refs[idxa].longterm) + return -1; + else + return 1; + } + + /* Long term pics in ascending frame num order. */ + if (builder->refs[idxa].longterm) + return builder->refs[idxa].frame_num < + builder->refs[idxb].frame_num ? + -1 : 1; + + poca = v4l2_h264_get_poc(builder, ptra); + pocb = v4l2_h264_get_poc(builder, ptrb); + + /* + * Short term pics with POC > cur POC first in POC ascending order + * followed by short term pics with POC < cur POC in POC descending + * order. + */ + if ((poca < builder->cur_pic_order_count) != + (pocb < builder->cur_pic_order_count)) + return pocb < poca ? -1 : 1; + else if (poca < builder->cur_pic_order_count) + return pocb < poca ? -1 : 1; + + return poca < pocb ? -1 : 1; +} + +/* + * The references need to be reordered so that references are alternating + * between top and bottom field references starting with the current picture + * parity. This has to be done for short term and long term references + * separately. + */ +static void reorder_field_reflist(const struct v4l2_h264_reflist_builder *b, + struct v4l2_h264_reference *reflist) +{ + struct v4l2_h264_reference tmplist[V4L2_H264_REF_LIST_LEN]; + u8 lt, i = 0, j = 0, k = 0; + + memcpy(tmplist, reflist, sizeof(tmplist[0]) * b->num_valid); + + for (lt = 0; lt <= 1; lt++) { + do { + for (; i < b->num_valid && b->refs[tmplist[i].index].longterm == lt; i++) { + if (tmplist[i].fields == b->cur_pic_fields) { + reflist[k++] = tmplist[i++]; + break; + } + } + + for (; j < b->num_valid && b->refs[tmplist[j].index].longterm == lt; j++) { + if (tmplist[j].fields != b->cur_pic_fields) { + reflist[k++] = tmplist[j++]; + break; + } + } + } while ((i < b->num_valid && b->refs[tmplist[i].index].longterm == lt) || + (j < b->num_valid && b->refs[tmplist[j].index].longterm == lt)); + } +} + +static char ref_type_to_char(u8 ref_type) +{ + switch (ref_type) { + case V4L2_H264_FRAME_REF: + return 'f'; + case V4L2_H264_TOP_FIELD_REF: + return 't'; + case V4L2_H264_BOTTOM_FIELD_REF: + return 'b'; + } + + return '?'; +} + +static const char *format_ref_list_p(const struct v4l2_h264_reflist_builder *builder, + struct v4l2_h264_reference *reflist, + char **out_str) +{ + int n = 0, i; + + *out_str = kmalloc(tmp_str_size, GFP_KERNEL); + + n += snprintf(*out_str + n, tmp_str_size - n, "|"); + + for (i = 0; i < builder->num_valid; i++) { + /* this is pic_num for frame and frame_num (wrapped) for field, + * but for frame pic_num is equal to frame_num (wrapped). + */ + int frame_num = builder->refs[reflist[i].index].frame_num; + bool longterm = builder->refs[reflist[i].index].longterm; + + n += scnprintf(*out_str + n, tmp_str_size - n, "%i%c%c|", + frame_num, longterm ? 'l' : 's', + ref_type_to_char(reflist[i].fields)); + } + + return *out_str; +} + +static void print_ref_list_p(const struct v4l2_h264_reflist_builder *builder, + struct v4l2_h264_reference *reflist) +{ + char *buf = NULL; + + pr_debug("ref_pic_list_p (cur_poc %u%c) %s\n", + builder->cur_pic_order_count, + ref_type_to_char(builder->cur_pic_fields), + format_ref_list_p(builder, reflist, &buf)); + + kfree(buf); +} + +static const char *format_ref_list_b(const struct v4l2_h264_reflist_builder *builder, + struct v4l2_h264_reference *reflist, + char **out_str) +{ + int n = 0, i; + + *out_str = kmalloc(tmp_str_size, GFP_KERNEL); + + n += snprintf(*out_str + n, tmp_str_size - n, "|"); + + for (i = 0; i < builder->num_valid; i++) { + int frame_num = builder->refs[reflist[i].index].frame_num; + u32 poc = v4l2_h264_get_poc(builder, reflist + i); + bool longterm = builder->refs[reflist[i].index].longterm; + + n += scnprintf(*out_str + n, tmp_str_size - n, "%i%c%c|", + longterm ? frame_num : poc, + longterm ? 'l' : 's', + ref_type_to_char(reflist[i].fields)); + } + + return *out_str; +} + +static void print_ref_list_b(const struct v4l2_h264_reflist_builder *builder, + struct v4l2_h264_reference *reflist, u8 list_num) +{ + char *buf = NULL; + + pr_debug("ref_pic_list_b%u (cur_poc %u%c) %s", + list_num, builder->cur_pic_order_count, + ref_type_to_char(builder->cur_pic_fields), + format_ref_list_b(builder, reflist, &buf)); + + kfree(buf); +} + +/** + * v4l2_h264_build_p_ref_list() - Build the P reference list + * + * @builder: reference list builder context + * @reflist: 32 sized array used to store the P reference list. Each entry + * is a v4l2_h264_reference structure + * + * This functions builds the P reference lists. This procedure is describe in + * section '8.2.4 Decoding process for reference picture lists construction' + * of the H264 spec. This function can be used by H264 decoder drivers that + * need to pass a P reference list to the hardware. + */ +void +v4l2_h264_build_p_ref_list(const struct v4l2_h264_reflist_builder *builder, + struct v4l2_h264_reference *reflist) +{ + memcpy(reflist, builder->unordered_reflist, + sizeof(builder->unordered_reflist[0]) * builder->num_valid); + sort_r(reflist, builder->num_valid, sizeof(*reflist), + v4l2_h264_p_ref_list_cmp, NULL, builder); + + if (builder->cur_pic_fields != V4L2_H264_FRAME_REF) + reorder_field_reflist(builder, reflist); + + print_ref_list_p(builder, reflist); +} +EXPORT_SYMBOL_GPL(v4l2_h264_build_p_ref_list); + +/** + * v4l2_h264_build_b_ref_lists() - Build the B0/B1 reference lists + * + * @builder: reference list builder context + * @b0_reflist: 32 sized array used to store the B0 reference list. Each entry + * is a v4l2_h264_reference structure + * @b1_reflist: 32 sized array used to store the B1 reference list. Each entry + * is a v4l2_h264_reference structure + * + * This functions builds the B0/B1 reference lists. This procedure is described + * in section '8.2.4 Decoding process for reference picture lists construction' + * of the H264 spec. This function can be used by H264 decoder drivers that + * need to pass B0/B1 reference lists to the hardware. + */ +void +v4l2_h264_build_b_ref_lists(const struct v4l2_h264_reflist_builder *builder, + struct v4l2_h264_reference *b0_reflist, + struct v4l2_h264_reference *b1_reflist) +{ + memcpy(b0_reflist, builder->unordered_reflist, + sizeof(builder->unordered_reflist[0]) * builder->num_valid); + sort_r(b0_reflist, builder->num_valid, sizeof(*b0_reflist), + v4l2_h264_b0_ref_list_cmp, NULL, builder); + + memcpy(b1_reflist, builder->unordered_reflist, + sizeof(builder->unordered_reflist[0]) * builder->num_valid); + sort_r(b1_reflist, builder->num_valid, sizeof(*b1_reflist), + v4l2_h264_b1_ref_list_cmp, NULL, builder); + + if (builder->cur_pic_fields != V4L2_H264_FRAME_REF) { + reorder_field_reflist(builder, b0_reflist); + reorder_field_reflist(builder, b1_reflist); + } + + if (builder->num_valid > 1 && + !memcmp(b1_reflist, b0_reflist, builder->num_valid)) + swap(b1_reflist[0], b1_reflist[1]); + + print_ref_list_b(builder, b0_reflist, 0); + print_ref_list_b(builder, b1_reflist, 1); +} +EXPORT_SYMBOL_GPL(v4l2_h264_build_b_ref_lists); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("V4L2 H264 Helpers"); +MODULE_AUTHOR("Boris Brezillon "); -- cgit v1.2.3