mirror of
https://github.com/FFmpeg/FFmpeg.git
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139 lines
6.4 KiB
C
139 lines
6.4 KiB
C
/*
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* Copyright (c) 2022 Michael Niedermayer
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "bsf.h"
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#include "bsf_internal.h"
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#include "libavutil/colorspace.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/opt.h"
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typedef struct DVErrorMarkerContext {
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const AVClass *class;
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uint8_t color_rgba[4];
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int sta;
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uint8_t marked_block[76];
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} DVErrorMarkerContext;
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static void setdc(uint8_t *b, const uint8_t color_rgba[4], int cblocks, int y_step, int v_step, int u_step) {
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for (int i=0; i<4; i++) {
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b[0] = RGB_TO_Y_JPEG(color_rgba[0], color_rgba[1],color_rgba[2]) + 128;
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b[1] = 0x06;
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b += y_step;
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}
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for (int i=0; i<cblocks; i++) {
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b[0] = RGB_TO_V_JPEG(color_rgba[0], color_rgba[1],color_rgba[2]) - 128;
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b[1] = 0x16;
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b += v_step;
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}
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for (int i=0; i<cblocks; i++) {
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b[0] = RGB_TO_U_JPEG(color_rgba[0], color_rgba[1],color_rgba[2]) - 128;
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b[1] = 0x16;
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b += u_step;
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}
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}
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static int dv_error_marker_init(AVBSFContext *ctx)
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{
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DVErrorMarkerContext *s = ctx->priv_data;
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memset(s->marked_block, -1, 76);
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setdc(s->marked_block, s->color_rgba, 1, 14, 10, 10);
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setdc(s->marked_block, s->color_rgba, 2, 10, 10, 8);
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return 0;
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}
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static int dv_error_marker_filter(AVBSFContext *ctx, AVPacket *pkt)
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{
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DVErrorMarkerContext *s = ctx->priv_data;
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int ret = ff_bsf_get_packet_ref(ctx, pkt);
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uint8_t *p;
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int writable = 0;
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int stamask = s->sta;
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int match_count = 0;
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if (ret < 0)
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return ret;
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p = pkt->data;
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for(int i = 0; i < pkt->size - 79; i+=80) {
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// 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.
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if ((p[i] >> 4) == 9 && ((stamask >> (p[i+3] >> 4))&1)) {
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if (!writable) {
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ret = av_packet_make_writable(pkt);
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if (ret < 0) {
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av_packet_unref(pkt);
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return ret;
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}
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writable = 1;
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p = pkt->data;
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}
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memcpy(p+i+4, s->marked_block, 76);
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match_count ++;
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}
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}
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av_log(ctx, AV_LOG_DEBUG, "%8"PRId64": Replaced %5d blocks by color %X\n", pkt->pts, match_count, AV_RB32(s->color_rgba));
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return 0;
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}
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#define OFFSET(x) offsetof(DVErrorMarkerContext, x)
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#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
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static const AVOption options[] = {
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{ "color" , "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "yellow"}, 0, 0, FLAGS },
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{ "sta" , "specify which error status value to match"
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, OFFSET(sta ), AV_OPT_TYPE_FLAGS, {.i64 = 0xFFFE}, 0, 0xFFFF, FLAGS, "sta" },
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{ "ok" , "No error, no concealment", 0, AV_OPT_TYPE_CONST, {.i64 = 0x0001}, 0, 0xFFFF, FLAGS, "sta"},
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{ "Aa" , "No error, concealment from previous frame type a",0, AV_OPT_TYPE_CONST, {.i64 = 0x0004}, 0, 0xFFFF, FLAGS, "sta"},
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{ "Ba" , "No error, concealment from next frame type a", 0, AV_OPT_TYPE_CONST, {.i64 = 0x0010}, 0, 0xFFFF, FLAGS, "sta"},
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{ "Ca" , "No error, unspecified concealment type a", 0, AV_OPT_TYPE_CONST, {.i64 = 0x0040}, 0, 0xFFFF, FLAGS, "sta"},
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{ "erri" , "Error with inserted code, No concealment", 0, AV_OPT_TYPE_CONST, {.i64 = 0x0080}, 0, 0xFFFF, FLAGS, "sta"},
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{ "erru" , "Error with unidentified pos, No concealment", 0, AV_OPT_TYPE_CONST, {.i64 = 0x8000}, 0, 0xFFFF, FLAGS, "sta"},
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{ "err" , "Error, No concealment", 0, AV_OPT_TYPE_CONST, {.i64 = 0x8080}, 0, 0xFFFF, FLAGS, "sta"},
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{ "Ab" , "No error, concealment from previous frame type b",0, AV_OPT_TYPE_CONST, {.i64 = 0x0400}, 0, 0xFFFF, FLAGS, "sta"},
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{ "Bb" , "No error, concealment from next frame type b", 0, AV_OPT_TYPE_CONST, {.i64 = 0x1000}, 0, 0xFFFF, FLAGS, "sta"},
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{ "Cb" , "No error, unspecified concealment type b", 0, AV_OPT_TYPE_CONST, {.i64 = 0x4000}, 0, 0xFFFF, FLAGS, "sta"},
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{ "A" , "No error, concealment from previous frame", 0, AV_OPT_TYPE_CONST, {.i64 = 0x0404}, 0, 0xFFFF, FLAGS, "sta"},
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{ "B" , "No error, concealment from next frame", 0, AV_OPT_TYPE_CONST, {.i64 = 0x1010}, 0, 0xFFFF, FLAGS, "sta"},
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{ "C" , "No error, unspecified concealment", 0, AV_OPT_TYPE_CONST, {.i64 = 0x4040}, 0, 0xFFFF, FLAGS, "sta"},
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{ "a" , "No error, concealment type a", 0, AV_OPT_TYPE_CONST, {.i64 = 0x0054}, 0, 0xFFFF, FLAGS, "sta"},
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{ "b" , "No error, concealment type b", 0, AV_OPT_TYPE_CONST, {.i64 = 0x5400}, 0, 0xFFFF, FLAGS, "sta"},
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{ "res" , "Reserved", 0, AV_OPT_TYPE_CONST, {.i64 = 0x2B2A}, 0, 0xFFFF, FLAGS, "sta"},
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{ "notok" , "Error or concealment", 0, AV_OPT_TYPE_CONST, {.i64 = 0xD4D4}, 0, 0xFFFF, FLAGS, "sta"},
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{ "notres" , "Not reserved", 0, AV_OPT_TYPE_CONST, {.i64 = 0xD4D5}, 0, 0xFFFF, FLAGS, "sta"},
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{ NULL },
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};
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static const AVClass dv_error_marker_class = {
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.class_name = "dv_error_marker",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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const AVBitStreamFilter ff_dv_error_marker_bsf = {
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.name = "dv_error_marker",
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.priv_data_size = sizeof(DVErrorMarkerContext),
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.priv_class = &dv_error_marker_class,
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.init = dv_error_marker_init,
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.filter = dv_error_marker_filter,
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.codec_ids = (const enum AVCodecID []){ AV_CODEC_ID_DVVIDEO, AV_CODEC_ID_NONE },
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};
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