/* * Copyright (c) 2022 Michael Niedermayer * * 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 "libavcodec/bsf.h" #include "libavcodec/bsf_internal.h" #include "libavutil/colorspace.h" #include "libavutil/intreadwrite.h" #include "libavutil/opt.h" typedef struct DVErrorMarkerContext { const AVClass *class; uint8_t color_rgba[4]; int sta; uint8_t marked_block[76]; } DVErrorMarkerContext; static void setdc(uint8_t *b, const uint8_t color_rgba[4], int cblocks, int y_step, int v_step, int u_step) { for (int i=0; i<4; i++) { b[0] = RGB_TO_Y_JPEG(color_rgba[0], color_rgba[1],color_rgba[2]) + 128; b[1] = 0x06; b += y_step; } for (int i=0; ipriv_data; memset(s->marked_block, -1, 76); setdc(s->marked_block, s->color_rgba, 1, 14, 10, 10); setdc(s->marked_block, s->color_rgba, 2, 10, 10, 8); return 0; } static int dv_error_marker_filter(AVBSFContext *ctx, AVPacket *pkt) { DVErrorMarkerContext *s = ctx->priv_data; int ret = ff_bsf_get_packet_ref(ctx, pkt); uint8_t *p; int writable = 0; int stamask = s->sta; int match_count = 0; if (ret < 0) return ret; p = pkt->data; for(int i = 0; i < pkt->size - 79; i+=80) { // see page 44-46 or section 5.5 of http://web.archive.org/web/20060927044735/http://www.smpte.org/smpte_store/standards/pdf/s314m.pdf. if ((p[i] >> 4) == 9 && ((stamask >> (p[i+3] >> 4))&1)) { if (!writable) { ret = av_packet_make_writable(pkt); if (ret < 0) { av_packet_unref(pkt); return ret; } writable = 1; p = pkt->data; } memcpy(p+i+4, s->marked_block, 76); match_count ++; } } av_log(ctx, AV_LOG_DEBUG, "%8"PRId64": Replaced %5d blocks by color %X\n", pkt->pts, match_count, AV_RB32(s->color_rgba)); return 0; } #define OFFSET(x) offsetof(DVErrorMarkerContext, x) #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM) static const AVOption options[] = { { "color" , "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "yellow"}, 0, 0, FLAGS }, { "sta" , "specify which error status value to match" , OFFSET(sta ), AV_OPT_TYPE_FLAGS, {.i64 = 0xFFFE}, 0, 0xFFFF, FLAGS, .unit = "sta" }, { "ok" , "No error, no concealment", 0, AV_OPT_TYPE_CONST, {.i64 = 0x0001}, 0, 0xFFFF, FLAGS, .unit = "sta"}, { "Aa" , "No error, concealment from previous frame type a",0, AV_OPT_TYPE_CONST, {.i64 = 0x0004}, 0, 0xFFFF, FLAGS, .unit = "sta"}, { "Ba" , "No error, concealment from next frame type a", 0, AV_OPT_TYPE_CONST, {.i64 = 0x0010}, 0, 0xFFFF, FLAGS, .unit = "sta"}, { "Ca" , "No error, unspecified concealment type a", 0, AV_OPT_TYPE_CONST, {.i64 = 0x0040}, 0, 0xFFFF, FLAGS, .unit = "sta"}, { "erri" , "Error with inserted code, No concealment", 0, AV_OPT_TYPE_CONST, {.i64 = 0x0080}, 0, 0xFFFF, FLAGS, .unit = "sta"}, { "erru" , "Error with unidentified pos, No concealment", 0, AV_OPT_TYPE_CONST, {.i64 = 0x8000}, 0, 0xFFFF, FLAGS, .unit = "sta"}, { "err" , "Error, No concealment", 0, AV_OPT_TYPE_CONST, {.i64 = 0x8080}, 0, 0xFFFF, FLAGS, .unit = "sta"}, { "Ab" , "No error, concealment from previous frame type b",0, AV_OPT_TYPE_CONST, {.i64 = 0x0400}, 0, 0xFFFF, FLAGS, .unit = "sta"}, { "Bb" , "No error, concealment from next frame type b", 0, AV_OPT_TYPE_CONST, {.i64 = 0x1000}, 0, 0xFFFF, FLAGS, .unit = "sta"}, { "Cb" , "No error, unspecified concealment type b", 0, AV_OPT_TYPE_CONST, {.i64 = 0x4000}, 0, 0xFFFF, FLAGS, .unit = "sta"}, { "A" , "No error, concealment from previous frame", 0, AV_OPT_TYPE_CONST, {.i64 = 0x0404}, 0, 0xFFFF, FLAGS, .unit = "sta"}, { "B" , "No error, concealment from next frame", 0, AV_OPT_TYPE_CONST, {.i64 = 0x1010}, 0, 0xFFFF, FLAGS, .unit = "sta"}, { "C" , "No error, unspecified concealment", 0, AV_OPT_TYPE_CONST, {.i64 = 0x4040}, 0, 0xFFFF, FLAGS, .unit = "sta"}, { "a" , "No error, concealment type a", 0, AV_OPT_TYPE_CONST, {.i64 = 0x0054}, 0, 0xFFFF, FLAGS, .unit = "sta"}, { "b" , "No error, concealment type b", 0, AV_OPT_TYPE_CONST, {.i64 = 0x5400}, 0, 0xFFFF, FLAGS, .unit = "sta"}, { "res" , "Reserved", 0, AV_OPT_TYPE_CONST, {.i64 = 0x2B2A}, 0, 0xFFFF, FLAGS, .unit = "sta"}, { "notok" , "Error or concealment", 0, AV_OPT_TYPE_CONST, {.i64 = 0xD4D4}, 0, 0xFFFF, FLAGS, .unit = "sta"}, { "notres" , "Not reserved", 0, AV_OPT_TYPE_CONST, {.i64 = 0xD4D5}, 0, 0xFFFF, FLAGS, .unit = "sta"}, { NULL }, }; static const AVClass dv_error_marker_class = { .class_name = "dv_error_marker", .item_name = av_default_item_name, .option = options, .version = LIBAVUTIL_VERSION_INT, }; const FFBitStreamFilter ff_dv_error_marker_bsf = { .p.name = "dv_error_marker", .p.codec_ids = (const enum AVCodecID []){ AV_CODEC_ID_DVVIDEO, AV_CODEC_ID_NONE }, .p.priv_class = &dv_error_marker_class, .priv_data_size = sizeof(DVErrorMarkerContext), .init = dv_error_marker_init, .filter = dv_error_marker_filter, };