From patchwork Mon Dec 20 15:31:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Niklas Haas X-Patchwork-Id: 32762 Delivered-To: ffmpegpatchwork2@gmail.com Received: by 2002:a6b:cd86:0:0:0:0:0 with SMTP id d128csp4476946iog; Mon, 20 Dec 2021 07:32:06 -0800 (PST) X-Google-Smtp-Source: ABdhPJzvjmF8rNrHaIJfSikhKdUXDhUMuH4FcVg7VBeVJYQ9N1N7lHjisxhUnUMphSJbEBoAcQ3E X-Received: by 2002:a17:906:d187:: with SMTP id c7mr12868779ejz.477.1640014326402; Mon, 20 Dec 2021 07:32:06 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1640014326; cv=none; d=google.com; s=arc-20160816; b=G6pbVKYq5yod1E9sYak+4V83A2oQDuBF4canOXqYsi4i7d79bB83nty+qh7lMAlZiq nh0kKbCS9PRKDQs2uQNXQVsOkxZxB6Y0SSvuesH5w1VgD8PHLw0IOm/faQSv6vCr++ui x2iDAtKVIXP+q9/8rQh6WoUuG+AOOANsZLEfzZJUv1wUxi4jhX27O8IPbRWvdRjj3jAd fFZ+MgwnseGYV4I17SxybrC3H4PwxUAbwz1629jkUBwi2s64vStvid7WqOFO3SjBxLEB AxJjNoQbr6D+tCklqmyDg2VVhqyT4EEQh7hpQRhQBXPGwAXaJSuuEq7YaKZBIYz63CWE +0lA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:content-transfer-encoding:cc:reply-to :list-subscribe:list-help:list-post:list-archive:list-unsubscribe :list-id:precedence:subject:mime-version:references:in-reply-to :message-id:date:to:from:dkim-signature:delivered-to; bh=1VF0cVF7QfOJcyCcQsw6GXJcObKmZAHdx6UU2w7tT5o=; b=kI7cQyr69UZnz0w51JQiZpWxr7jq6R6I5wQ4mkoeMoC72ofaT5KEBVFBUesAbGAAce cI1OiOt7wwlW0TBkBvJSyQgUIRvN6RKXUyX2o4RRA/dzhaUK3Fvf8h/eQ/eMn4L0OtKw MezV99rzrCx6+756rHZVeaYyn9fkounG5eSiAU1s1p/2vxka+m/mQUdB3kVCtrEQ5Rru HKCg4rkY6lpuMuBY3iJ6641BFf2kmDPN2oXLJJQl2TIEa+WKMVNz0ORXQlcR42zJP8Pv yXFV90fb4E1C0DYC/YESqwuByI7IOpxIv2yvGS+HyjHCj5l/jMn4rDvOyuncUP9Dqa9k eXFw== ARC-Authentication-Results: i=1; mx.google.com; dkim=neutral (body hash did not verify) header.i=@haasn.xyz header.s=mail header.b=Xo0o86MA; spf=pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) smtp.mailfrom=ffmpeg-devel-bounces@ffmpeg.org Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org. [79.124.17.100]) by mx.google.com with ESMTP id m16si11854422edd.566.2021.12.20.07.32.06; Mon, 20 Dec 2021 07:32:06 -0800 (PST) Received-SPF: pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) client-ip=79.124.17.100; Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@haasn.xyz header.s=mail header.b=Xo0o86MA; spf=pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) smtp.mailfrom=ffmpeg-devel-bounces@ffmpeg.org Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 385FF68AFBC; Mon, 20 Dec 2021 17:31:33 +0200 (EET) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from haasn.dev (haasn.dev [78.46.187.166]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 6024368AEC8 for ; Mon, 20 Dec 2021 17:31:24 +0200 (EET) Received: from haasn.dev (unknown [10.30.0.2]) by haasn.dev (Postfix) with ESMTP id 1ECCF49363; Mon, 20 Dec 2021 16:31:24 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=haasn.xyz; s=mail; t=1640014284; bh=Rpg883YHPQnYRPIFtnIzEGapYiVCBz2vgMb9FYbCjhk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Xo0o86MAOsUu9dTmiLM2LG/DqDI5K2zMTS0m8MUJVblNRCd6fxawaFp35gBFKPHXr IrLWWjYLnERvaetxpG4ZIzLY2KatYcaEQaAmqCpfVjf93PIX+bU+MsodFk28J8FNz4 tMFSz9sZK6H9XH0hwZ1wbt4c27v/3ggWUTmUgdl0= From: Niklas Haas To: ffmpeg-devel@ffmpeg.org Date: Mon, 20 Dec 2021 16:31:20 +0100 Message-Id: <20211220153122.54839-4-ffmpeg@haasn.xyz> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20211220153122.54839-1-ffmpeg@haasn.xyz> References: <20211220134420.69078-1-ffmpeg@haasn.xyz> <20211220153122.54839-1-ffmpeg@haasn.xyz> MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH v8 4/6] lavc: Implement Dolby Vision RPU parsing X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Cc: Niklas Haas Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" X-TUID: 4/61gQgBg3HH From: Niklas Haas Based on a mixture of guesswork, partial documentation in patents, and reverse engineering of real-world samples. Confirmed working for all the samples I've thrown at it. Contains some annoying machinery to persist these values in between frames, which is needed in theory even though I've never actually seen a sample that relies on it in practice. May or may not work. Since the distinction matters greatly for parsing the color matrix values, this includes a small helper function to guess the right profile from the RPU itself in case the user has forgotten to forward the dovi configuration record to the decoder. (Which in practice, only ffmpeg.c and ffplay do..) Notable omissions / deviations: - CRC32 verification. This is based on the MPEG2 CRC32 type, which does not seem to be implemented in lavu. (And I don't care enough to do so) - Linear interpolation support. Nothing documents this (beyond its existence) and no samples use it, so impossible to implement. - All of the extension metadata blocks, but these contain values that seem largely congruent with ST2094, HDR10, or other existing forms of side data, so I will defer parsing/attaching them to a future commit. - The patent describes a mechanism for predicting coefficients from previous RPUs, but the bit for the flag whether to use the prediction deltas or signal entirely new coefficients does not seem to be present in actual RPUs, so we ignore this subsystem entirely. - In the patent's spec, the NLQ subsystem also loops over num_nlq_pivots, but even in the patent the number is hard-coded to one iteration rather than signalled. So we only store one set of coefs. Heavily influenced by https://github.com/quietvoid/dovi_tool Documentation drawn from US Patent 10,701,399 B2 and ETSI GS CCM 001 Signed-off-by: Niklas Haas --- configure | 2 + libavcodec/Makefile | 1 + libavcodec/dovi_rpu.c | 430 ++++++++++++++++++++++++++++++++++++++++++ libavcodec/dovi_rpu.h | 71 +++++++ 4 files changed, 504 insertions(+) create mode 100644 libavcodec/dovi_rpu.c create mode 100644 libavcodec/dovi_rpu.h diff --git a/configure b/configure index d9d41b2273..9a27ff9bbc 100755 --- a/configure +++ b/configure @@ -2434,6 +2434,7 @@ CONFIG_EXTRA=" cbs_vp9 dirac_parse dnn + dovi_rpu dvprofile exif faandct @@ -2706,6 +2707,7 @@ cbs_mpeg2_select="cbs" cbs_vp9_select="cbs" dct_select="rdft" dirac_parse_select="golomb" +dovi_rpu_select="golomb" dnn_suggest="libtensorflow libopenvino" dnn_deps="avformat swscale" error_resilience_select="me_cmp" diff --git a/libavcodec/Makefile b/libavcodec/Makefile index fb90ecea84..7364c7a91f 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -77,6 +77,7 @@ OBJS-$(CONFIG_CBS_MPEG2) += cbs_mpeg2.o OBJS-$(CONFIG_CBS_VP9) += cbs_vp9.o OBJS-$(CONFIG_CRYSTALHD) += crystalhd.o OBJS-$(CONFIG_DCT) += dct.o dct32_fixed.o dct32_float.o +OBJS-$(CONFIG_DOVI_RPU) += dovi_rpu.o OBJS-$(CONFIG_ERROR_RESILIENCE) += error_resilience.o OBJS-$(CONFIG_EXIF) += exif.o tiff_common.o OBJS-$(CONFIG_FAANDCT) += faandct.o diff --git a/libavcodec/dovi_rpu.c b/libavcodec/dovi_rpu.c new file mode 100644 index 0000000000..0fc6e5285f --- /dev/null +++ b/libavcodec/dovi_rpu.c @@ -0,0 +1,430 @@ +/* + * Dolby Vision RPU decoder + * + * Copyright (C) 2021 Jan Ekström + * Copyright (C) 2021 Niklas Haas + * + * 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 "libavutil/buffer.h" + +#include "dovi_rpu.h" +#include "golomb.h" +#include "get_bits.h" + +enum { + RPU_COEFF_FIXED = 0, + RPU_COEFF_FLOAT = 1, +}; + +/** + * Private contents of vdr_ref. + */ +typedef struct DOVIVdrRef { + AVDOVIDataMapping mapping; + AVDOVIColorMetadata color; +} DOVIVdrRef; + +void ff_dovi_ctx_unref(DOVIContext *s) +{ + for (int i = 0; i < FF_ARRAY_ELEMS(s->vdr_ref); i++) + av_buffer_unref(&s->vdr_ref[i]); + + /* Preserve the user-provided fields explicitly, reset everything else */ + *s = (DOVIContext) { + .logctx = s->logctx, + .config = s->config, + }; +} + +int ff_dovi_ctx_replace(DOVIContext *s, const DOVIContext *s0) +{ + int ret; + s->logctx = s0->logctx; + s->config = s0->config; + s->mapping = s0->mapping; + s->color = s0->color; + for (int i = 0; i < DOVI_MAX_DM_ID; i++) { + if ((ret = av_buffer_replace(&s->vdr_ref[i], s0->vdr_ref[i])) < 0) + goto fail; + } + + return 0; + +fail: + ff_dovi_ctx_unref(s); + return ret; +} + +int ff_dovi_attach_side_data(DOVIContext *s, AVFrame *frame) +{ + AVFrameSideData *sd; + AVBufferRef *buf; + AVDOVIMetadata *dovi; + size_t dovi_size; + + if (!s->mapping || !s->color) + return 0; /* incomplete dovi metadata */ + + dovi = av_dovi_metadata_alloc(&dovi_size); + if (!dovi) + return AVERROR(ENOMEM); + + buf = av_buffer_create((uint8_t *) dovi, dovi_size, NULL, NULL, 0); + if (!buf) { + av_free(dovi); + return AVERROR(ENOMEM); + } + + sd = av_frame_new_side_data_from_buf(frame, AV_FRAME_DATA_DOVI_METADATA, buf); + if (!sd) { + av_buffer_unref(&buf); + return AVERROR(ENOMEM); + } + + memcpy(&dovi->header, &s->header, sizeof(dovi->header)); + memcpy(&dovi->mapping, s->mapping, sizeof(dovi->mapping)); + memcpy(&dovi->color, s->color, sizeof(dovi->color)); + return 0; +} + +static int guess_profile(const AVDOVIRpuDataHeader *hdr) +{ + switch (hdr->vdr_rpu_profile) { + case 0: + if (hdr->bl_video_full_range_flag) + return 5; + break; + case 1: + if (hdr->el_spatial_resampling_filter_flag && !hdr->disable_residual_flag) { + if (hdr->vdr_bit_depth == 12) { + return 7; + } else { + return 4; + } + } else { + return 8; + } + } + + return 0; /* unknown */ +} + +static inline uint64_t get_ue_coef(GetBitContext *gb, const AVDOVIRpuDataHeader *hdr) +{ + uint64_t ipart; + union { uint32_t u32; float f32; } fpart; + + switch (hdr->coef_data_type) { + case RPU_COEFF_FIXED: + ipart = get_ue_golomb_long(gb); + fpart.u32 = get_bits_long(gb, hdr->coef_log2_denom); + return (ipart << hdr->coef_log2_denom) + fpart.u32; + + case RPU_COEFF_FLOAT: + fpart.u32 = get_bits_long(gb, 32); + return fpart.f32 * (1 << hdr->coef_log2_denom); + } + + return 0; /* unreachable */ +} + +static inline int64_t get_se_coef(GetBitContext *gb, const AVDOVIRpuDataHeader *hdr) +{ + int64_t ipart; + union { uint32_t u32; float f32; } fpart; + + switch (hdr->coef_data_type) { + case RPU_COEFF_FIXED: + ipart = get_se_golomb_long(gb); + fpart.u32 = get_bits_long(gb, hdr->coef_log2_denom); + return (ipart << hdr->coef_log2_denom) + fpart.u32; + + case RPU_COEFF_FLOAT: + fpart.u32 = get_bits_long(gb, 32); + return fpart.f32 * (1 << hdr->coef_log2_denom); + } + + return 0; /* unreachable */ +} + +#define VALIDATE(VAR, MIN, MAX) \ + do { \ + if (VAR < MIN || VAR > MAX) { \ + av_log(s->logctx, AV_LOG_ERROR, "RPU validation failed: " \ + #MIN" <= "#VAR" = %d <= "#MAX"\n", (int) VAR); \ + goto fail; \ + } \ + } while (0) + +int ff_dovi_rpu_parse(DOVIContext *s, const uint8_t *rpu, size_t rpu_size) +{ + AVDOVIRpuDataHeader *hdr = &s->header; + GetBitContext *gb = &(GetBitContext){0}; + DOVIVdrRef *vdr; + int ret; + + uint8_t nal_prefix; + uint8_t rpu_type; + uint8_t vdr_seq_info_present; + uint8_t vdr_dm_metadata_present; + uint8_t use_prev_vdr_rpu; + uint8_t use_nlq; + uint8_t profile; + if ((ret = init_get_bits8(gb, rpu, rpu_size)) < 0) + return ret; + + /* RPU header, common values */ + nal_prefix = get_bits(gb, 8); + VALIDATE(nal_prefix, 25, 25); + rpu_type = get_bits(gb, 6); + if (rpu_type != 2) { + av_log(s->logctx, AV_LOG_WARNING, "Unrecognized RPU type " + "%"PRIu8", ignoring\n", rpu_type); + return 0; + } + + hdr->rpu_type = rpu_type; + hdr->rpu_format = get_bits(gb, 11); + + /* Values specific to RPU type 2 */ + hdr->vdr_rpu_profile = get_bits(gb, 4); + hdr->vdr_rpu_level = get_bits(gb, 4); + + vdr_seq_info_present = get_bits1(gb); + if (vdr_seq_info_present) { + hdr->chroma_resampling_explicit_filter_flag = get_bits1(gb); + hdr->coef_data_type = get_bits(gb, 2); + VALIDATE(hdr->coef_data_type, RPU_COEFF_FIXED, RPU_COEFF_FLOAT); + switch (hdr->coef_data_type) { + case RPU_COEFF_FIXED: + hdr->coef_log2_denom = get_ue_golomb(gb); + VALIDATE(hdr->coef_log2_denom, 13, 32); + break; + case RPU_COEFF_FLOAT: + hdr->coef_log2_denom = 32; /* arbitrary, choose maximum precision */ + break; + } + + hdr->vdr_rpu_normalized_idc = get_bits(gb, 2); + hdr->bl_video_full_range_flag = get_bits1(gb); + + if ((hdr->rpu_format & 0x700) == 0) { + int bl_bit_depth_minus8 = get_ue_golomb_31(gb); + int el_bit_depth_minus8 = get_ue_golomb_31(gb); + int vdr_bit_depth_minus8 = get_ue_golomb_31(gb); + VALIDATE(bl_bit_depth_minus8, 0, 8); + VALIDATE(el_bit_depth_minus8, 0, 8); + VALIDATE(vdr_bit_depth_minus8, 0, 8); + hdr->bl_bit_depth = bl_bit_depth_minus8 + 8; + hdr->el_bit_depth = el_bit_depth_minus8 + 8; + hdr->vdr_bit_depth = vdr_bit_depth_minus8 + 8; + hdr->spatial_resampling_filter_flag = get_bits1(gb); + skip_bits(gb, 3); /* reserved_zero_3bits */ + hdr->el_spatial_resampling_filter_flag = get_bits1(gb); + hdr->disable_residual_flag = get_bits1(gb); + } + } + + if (!hdr->bl_bit_depth) { + av_log(s->logctx, AV_LOG_ERROR, "Missing RPU VDR sequence info?\n"); + goto fail; + } + + vdr_dm_metadata_present = get_bits1(gb); + use_prev_vdr_rpu = get_bits1(gb); + use_nlq = (hdr->rpu_format & 0x700) == 0 && !hdr->disable_residual_flag; + + profile = s->config ? s->config->dv_profile : guess_profile(hdr); + if (profile == 5 && use_nlq) { + av_log(s->logctx, AV_LOG_ERROR, "Profile 5 RPUs should not use NLQ\n"); + goto fail; + } + + if (use_prev_vdr_rpu) { + int prev_vdr_rpu_id = get_ue_golomb_31(gb); + VALIDATE(prev_vdr_rpu_id, 0, DOVI_MAX_DM_ID); + if (!s->vdr_ref[prev_vdr_rpu_id]) { + av_log(s->logctx, AV_LOG_ERROR, "Unknown previous RPU ID: %u\n", + prev_vdr_rpu_id); + goto fail; + } + vdr = (DOVIVdrRef *) s->vdr_ref[prev_vdr_rpu_id]->data; + s->mapping = &vdr->mapping; + } else { + int vdr_rpu_id = get_ue_golomb_31(gb); + VALIDATE(vdr_rpu_id, 0, DOVI_MAX_DM_ID); + if (!s->vdr_ref[vdr_rpu_id]) { + s->vdr_ref[vdr_rpu_id] = av_buffer_allocz(sizeof(DOVIVdrRef)); + if (!s->vdr_ref[vdr_rpu_id]) + return AVERROR(ENOMEM); + } + + vdr = (DOVIVdrRef *) s->vdr_ref[vdr_rpu_id]->data; + s->mapping = &vdr->mapping; + + vdr->mapping.vdr_rpu_id = vdr_rpu_id; + vdr->mapping.mapping_color_space = get_ue_golomb_31(gb); + vdr->mapping.mapping_chroma_format_idc = get_ue_golomb_31(gb); + + for (int c = 0; c < 3; c++) { + AVDOVIReshapingCurve *curve = &vdr->mapping.curves[c]; + int num_pivots_minus_2 = get_ue_golomb_31(gb); + int pivot = 0; + + VALIDATE(num_pivots_minus_2, 0, AV_DOVI_MAX_PIECES - 1); + curve->num_pivots = num_pivots_minus_2 + 2; + for (int i = 0; i < curve->num_pivots; i++) { + pivot += get_bits(gb, hdr->bl_bit_depth); + curve->pivots[i] = av_clip_uint16(pivot); + } + } + + if (use_nlq) { + vdr->mapping.nlq_method_idc = get_bits(gb, 3); + /** + * The patent mentions another legal value, NLQ_MU_LAW, but it's + * not documented anywhere how to parse or apply that type of NLQ. + */ + VALIDATE(vdr->mapping.nlq_method_idc, 0, AV_DOVI_NLQ_LINEAR_DZ); + } else { + vdr->mapping.nlq_method_idc = AV_DOVI_NLQ_NONE; + } + + vdr->mapping.num_x_partitions = get_ue_golomb_long(gb) + 1; + vdr->mapping.num_y_partitions = get_ue_golomb_long(gb) + 1; + /* End of rpu_data_header(), start of vdr_rpu_data_payload() */ + + for (int c = 0; c < 3; c++) { + AVDOVIReshapingCurve *curve = &vdr->mapping.curves[c]; + for (int i = 0; i < curve->num_pivots - 1; i++) { + int mapping_idc = get_ue_golomb_31(gb); + VALIDATE(mapping_idc, 0, 1); + curve->mapping_idc[i] = mapping_idc; + switch (mapping_idc) { + case AV_DOVI_MAPPING_POLYNOMIAL: { + int poly_order_minus1 = get_ue_golomb_31(gb); + VALIDATE(poly_order_minus1, 0, 1); + curve->poly_order[i] = poly_order_minus1 + 1; + if (poly_order_minus1 == 0) { + int linear_interp_flag = get_bits1(gb); + if (linear_interp_flag) { + /* lack of documentation/samples */ + avpriv_request_sample(s->logctx, "Dolby Vision " + "linear interpolation"); + ff_dovi_ctx_unref(s); + return AVERROR_PATCHWELCOME; + } + } + for (int k = 0; k <= curve->poly_order[i]; k++) + curve->poly_coef[i][k] = get_se_coef(gb, hdr); + break; + } + case AV_DOVI_MAPPING_MMR: { + int mmr_order_minus1 = get_bits(gb, 2); + VALIDATE(mmr_order_minus1, 0, 2); + curve->mmr_order[i] = mmr_order_minus1 + 1; + curve->mmr_constant[i] = get_se_coef(gb, hdr); + for (int j = 0; j < curve->mmr_order[i]; j++) { + for (int k = 0; k < 7; k++) + curve->mmr_coef[i][j][k] = get_se_coef(gb, hdr); + } + break; + } + } + } + } + + if (use_nlq) { + for (int c = 0; c < 3; c++) { + AVDOVINLQParams *nlq = &vdr->mapping.nlq[c]; + nlq->nlq_offset = get_bits(gb, hdr->el_bit_depth); + nlq->vdr_in_max = get_ue_coef(gb, hdr); + switch (vdr->mapping.nlq_method_idc) { + case AV_DOVI_NLQ_LINEAR_DZ: + nlq->linear_deadzone_slope = get_ue_coef(gb, hdr); + nlq->linear_deadzone_threshold = get_ue_coef(gb, hdr); + break; + } + } + } + } + + if (vdr_dm_metadata_present) { + AVDOVIColorMetadata *color; + int affected_dm_id = get_ue_golomb_31(gb); + int current_dm_id = get_ue_golomb_31(gb); + VALIDATE(affected_dm_id, 0, DOVI_MAX_DM_ID); + VALIDATE(current_dm_id, 0, DOVI_MAX_DM_ID); + if (!s->vdr_ref[affected_dm_id]) { + s->vdr_ref[affected_dm_id] = av_buffer_allocz(sizeof(DOVIVdrRef)); + if (!s->vdr_ref[affected_dm_id]) + return AVERROR(ENOMEM); + } + + if (!s->vdr_ref[current_dm_id]) { + av_log(s->logctx, AV_LOG_ERROR, "Unknown previous RPU DM ID: %u\n", + current_dm_id); + goto fail; + } + + /* Update current pointer based on current_dm_id */ + vdr = (DOVIVdrRef *) s->vdr_ref[current_dm_id]->data; + s->color = &vdr->color; + + /* Update values of affected_dm_id */ + vdr = (DOVIVdrRef *) s->vdr_ref[affected_dm_id]->data; + color = &vdr->color; + color->dm_metadata_id = affected_dm_id; + color->scene_refresh_flag = get_ue_golomb_31(gb); + for (int i = 0; i < 9; i++) + color->ycc_to_rgb_matrix[i] = av_make_q(get_sbits(gb, 16), 1 << 13); + for (int i = 0; i < 3; i++) { + int denom = profile == 4 ? (1 << 30) : (1 << 28); + unsigned offset = get_bits_long(gb, 32); + if (offset > INT_MAX) { + /* Ensure the result fits inside AVRational */ + offset >>= 1; + denom >>= 1; + } + color->ycc_to_rgb_offset[i] = av_make_q(offset, denom); + } + for (int i = 0; i < 9; i++) + color->rgb_to_lms_matrix[i] = av_make_q(get_sbits(gb, 16), 1 << 14); + + color->signal_eotf = get_bits(gb, 16); + color->signal_eotf_param0 = get_bits(gb, 16); + color->signal_eotf_param1 = get_bits(gb, 16); + color->signal_eotf_param2 = get_bits_long(gb, 32); + color->signal_bit_depth = get_bits(gb, 5); + VALIDATE(color->signal_bit_depth, 8, 16); + color->signal_color_space = get_bits(gb, 2); + color->signal_chroma_format = get_bits(gb, 2); + color->signal_full_range_flag = get_bits(gb, 2); + color->source_min_pq = get_bits(gb, 12); + color->source_max_pq = get_bits(gb, 12); + color->source_diagonal = get_bits(gb, 10); + } + + /* FIXME: verify CRC32, requires implementation of AV_CRC_32_MPEG_2 */ + return 0; + +fail: + ff_dovi_ctx_unref(s); /* don't leak potentially invalid state */ + return AVERROR(EINVAL); +} diff --git a/libavcodec/dovi_rpu.h b/libavcodec/dovi_rpu.h new file mode 100644 index 0000000000..6925940dd1 --- /dev/null +++ b/libavcodec/dovi_rpu.h @@ -0,0 +1,71 @@ +/* + * Dolby Vision RPU decoder + * + * Copyright (C) 2021 Jan Ekström + * Copyright (C) 2021 Niklas Haas + * + * 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_DOVI_RPU_H +#define AVCODEC_DOVI_RPU_H + +#include "libavutil/dovi_meta.h" +#include "libavutil/frame.h" + +#define DOVI_MAX_DM_ID 15 +typedef struct DOVIContext { + void *logctx; + const AVDOVIDecoderConfigurationRecord *config; ///< provided by API user + AVBufferRef *vdr_ref[DOVI_MAX_DM_ID+1]; ///< decoded VDR data mappings + + /** + * Currently active RPU data header, updates on every dovi_rpu_parse(). + */ + AVDOVIRpuDataHeader header; + + /** + * Currently active data mappings, or NULL. Points into memory owned by the + * corresponding rpu/vdr_ref, which becomes invalid on the next call to + * dovi_rpu_parse. + */ + const AVDOVIDataMapping *mapping; + const AVDOVIColorMetadata *color; +} DOVIContext; + +/** + * Completely resets the internal state of a DOVIContext, but explicitly + * preserves any user-provided fields. + */ +void ff_dovi_ctx_unref(DOVIContext *s); + +int ff_dovi_ctx_replace(DOVIContext *s, const DOVIContext *s0); + +/** + * Parse the contents of a Dovi RPU NAL and update the parsed values in the + * DOVIContext struct. + * + * Returns 0 or an error code. + */ +int ff_dovi_rpu_parse(DOVIContext *s, const uint8_t *rpu, size_t rpu_size); + +/** + * Attach the decoded AVDOVIMetadata as side data to an AVFrame. + */ +int ff_dovi_attach_side_data(DOVIContext *s, AVFrame *frame); + +#endif /* AVCODEC_DOVI_RPU_H */