/* * Prores Metadata bitstream filter * Copyright (c) 2018 Jokyo Images * * 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 */ /** * @file * Prores Metadata bitstream filter * set frame colorspace property */ #include "libavutil/common.h" #include "libavutil/intreadwrite.h" #include "libavutil/opt.h" #include "bsf.h" typedef struct ProresMetadataContext { const AVClass *class; int color_primaries; int transfer_characteristics; int matrix_coefficients; } ProresMetadataContext; static int prores_metadata(AVBSFContext *bsf, AVPacket *pkt) { ProresMetadataContext *ctx = bsf->priv_data; int ret = 0; int buf_size; uint8_t *buf; ret = ff_bsf_get_packet_ref(bsf, pkt); if (ret < 0) return ret; ret = av_packet_make_writable(pkt); if (ret < 0) goto fail; buf = pkt->data; buf_size = pkt->size; /* check start of the prores frame */ if (buf_size < 28) { av_log(bsf, AV_LOG_ERROR, "not enough data in prores frame\n"); ret = AVERROR_INVALIDDATA; goto fail; } if (AV_RL32(buf + 4) != AV_RL32("icpf")) { av_log(bsf, AV_LOG_ERROR, "invalid frame header\n"); ret = AVERROR_INVALIDDATA; goto fail; } if (AV_RB16(buf + 8) < 28) { av_log(bsf, AV_LOG_ERROR, "invalid frame header size\n"); ret = AVERROR_INVALIDDATA; goto fail; } /* set the new values */ if (ctx->color_primaries != -1) buf[8+14] = ctx->color_primaries; if (ctx->transfer_characteristics != -1) buf[8+15] = ctx->transfer_characteristics; if (ctx->matrix_coefficients != -1) buf[8+16] = ctx->matrix_coefficients; fail: if (ret < 0) av_packet_unref(pkt); return ret; } static const enum AVCodecID codec_ids[] = { AV_CODEC_ID_PRORES, AV_CODEC_ID_NONE, }; static int prores_metadata_init(AVBSFContext *bsf) { ProresMetadataContext *ctx = bsf->priv_data; /*! check options */ switch (ctx->color_primaries) { case -1: case 0: case AVCOL_PRI_BT709: case AVCOL_PRI_BT470BG: case AVCOL_PRI_SMPTE170M: case AVCOL_PRI_BT2020: case AVCOL_PRI_SMPTE431: case AVCOL_PRI_SMPTE432: break; default: av_log(bsf, AV_LOG_ERROR, "Color primaries %d is not a valid value\n", ctx->color_primaries); return AVERROR(EINVAL); } switch (ctx->matrix_coefficients) { case -1: case 0: case AVCOL_SPC_BT709: case AVCOL_SPC_SMPTE170M: case AVCOL_SPC_BT2020_NCL: break; default: av_log(bsf, AV_LOG_ERROR, "Colorspace %d is not a valid value\n", ctx->matrix_coefficients); return AVERROR(EINVAL); } return 0; } #define OFFSET(x) offsetof(ProresMetadataContext, x) #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_BSF_PARAM) static const AVOption options[] = { {"color_primaries", "select color primaries", OFFSET(color_primaries), AV_OPT_TYPE_INT, {.i64=-1}, -1, AVCOL_PRI_SMPTE432, FLAGS, "color_primaries"}, {"auto", "keep the same color primaries", 0, AV_OPT_TYPE_CONST, {.i64=-1}, INT_MIN, INT_MAX, FLAGS, "color_primaries"}, {"unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, INT_MIN, INT_MAX, FLAGS, "color_primaries"}, {"bt709", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_BT709}, INT_MIN, INT_MAX, FLAGS, "color_primaries"}, {"bt470bg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_BT470BG}, INT_MIN, INT_MAX, FLAGS, "color_primaries"}, {"smpte170m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE170M}, INT_MIN, INT_MAX, FLAGS, "color_primaries"}, {"bt2020", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_BT2020}, INT_MIN, INT_MAX, FLAGS, "color_primaries"}, {"smpte431", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE431}, INT_MIN, INT_MAX, FLAGS, "color_primaries"}, {"smpte432", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE432}, INT_MIN, INT_MAX, FLAGS, "color_primaries"}, {"color_trc", "select color transfer", OFFSET(transfer_characteristics), AV_OPT_TYPE_INT, {.i64=-1}, -1, AVCOL_TRC_BT709, FLAGS, "color_trc"}, {"auto", "keep the same color transfer", 0, AV_OPT_TYPE_CONST, {.i64=-1}, INT_MIN, INT_MAX, FLAGS, "color_trc"}, {"unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, INT_MIN, INT_MAX, FLAGS, "color_trc"}, {"bt709", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_BT709}, INT_MIN, INT_MAX, FLAGS, "color_trc"}, {"colorspace", "select colorspace", OFFSET(matrix_coefficients), AV_OPT_TYPE_INT, {.i64=-1}, -1, AVCOL_SPC_BT2020_NCL, FLAGS, "colorspace"}, {"auto", "keep the same colorspace", 0, AV_OPT_TYPE_CONST, {.i64=-1}, INT_MIN, INT_MAX, FLAGS, "colorspace"}, {"unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, INT_MIN, INT_MAX, FLAGS, "colorspace"}, {"bt709", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT709}, INT_MIN, INT_MAX, FLAGS, "colorspace"}, {"smpte170m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_SMPTE170M}, INT_MIN, INT_MAX, FLAGS, "colorspace"}, {"bt2020nc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT2020_NCL}, INT_MIN, INT_MAX, FLAGS, "colorspace"}, { NULL }, }; static const AVClass prores_metadata_class = { .class_name = "prores_metadata_bsf", .item_name = av_default_item_name, .option = options, .version = LIBAVUTIL_VERSION_INT, }; const AVBitStreamFilter ff_prores_metadata_bsf = { .name = "prores_metadata", .init = prores_metadata_init, .filter = prores_metadata, .priv_data_size = sizeof(ProresMetadataContext), .priv_class = &prores_metadata_class, .codec_ids = codec_ids, };