| /* |
| * Copyright (c) 2019 James Almer <jamrial@gmail.com> |
| * |
| * 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 "bsf.h" |
| #include "bsf_internal.h" |
| #include "cbs.h" |
| #include "cbs_av1.h" |
| |
| typedef struct AV1FMergeContext { |
| CodedBitstreamContext *input; |
| CodedBitstreamContext *output; |
| CodedBitstreamFragment frag[2]; |
| AVPacket *pkt, *in; |
| int idx; |
| } AV1FMergeContext; |
| |
| static void av1_frame_merge_flush(AVBSFContext *bsf) |
| { |
| AV1FMergeContext *ctx = bsf->priv_data; |
| |
| ff_cbs_fragment_reset(&ctx->frag[0]); |
| ff_cbs_fragment_reset(&ctx->frag[1]); |
| av_packet_unref(ctx->in); |
| av_packet_unref(ctx->pkt); |
| } |
| |
| static int av1_frame_merge_filter(AVBSFContext *bsf, AVPacket *out) |
| { |
| AV1FMergeContext *ctx = bsf->priv_data; |
| CodedBitstreamFragment *frag = &ctx->frag[ctx->idx], *tu = &ctx->frag[!ctx->idx]; |
| AVPacket *in = ctx->in, *buffer_pkt = ctx->pkt; |
| int err, i; |
| |
| err = ff_bsf_get_packet_ref(bsf, in); |
| if (err < 0) { |
| if (err == AVERROR_EOF && tu->nb_units > 0) |
| goto eof; |
| return err; |
| } |
| |
| err = ff_cbs_read_packet(ctx->input, frag, in); |
| if (err < 0) { |
| av_log(bsf, AV_LOG_ERROR, "Failed to read packet.\n"); |
| goto fail; |
| } |
| |
| if (frag->nb_units == 0) { |
| av_log(bsf, AV_LOG_ERROR, "No OBU in packet.\n"); |
| err = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| |
| if (tu->nb_units == 0 && frag->units[0].type != AV1_OBU_TEMPORAL_DELIMITER) { |
| av_log(bsf, AV_LOG_ERROR, "Missing Temporal Delimiter.\n"); |
| err = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| |
| for (i = 1; i < frag->nb_units; i++) { |
| if (frag->units[i].type == AV1_OBU_TEMPORAL_DELIMITER) { |
| av_log(bsf, AV_LOG_ERROR, "Temporal Delimiter in the middle of a packet.\n"); |
| err = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| } |
| |
| if (tu->nb_units > 0 && frag->units[0].type == AV1_OBU_TEMPORAL_DELIMITER) { |
| eof: |
| err = ff_cbs_write_packet(ctx->output, buffer_pkt, tu); |
| if (err < 0) { |
| av_log(bsf, AV_LOG_ERROR, "Failed to write packet.\n"); |
| goto fail; |
| } |
| av_packet_move_ref(out, buffer_pkt); |
| |
| // Swap fragment index, to avoid copying fragment references. |
| ctx->idx = !ctx->idx; |
| } else { |
| for (i = 0; i < frag->nb_units; i++) { |
| err = ff_cbs_insert_unit_content(tu, -1, frag->units[i].type, |
| frag->units[i].content, frag->units[i].content_ref); |
| if (err < 0) |
| goto fail; |
| } |
| |
| err = AVERROR(EAGAIN); |
| } |
| |
| // Buffer packets with timestamps. There should be at most one per TU, be it split or not. |
| if (!buffer_pkt->data && in->pts != AV_NOPTS_VALUE) |
| av_packet_move_ref(buffer_pkt, in); |
| else |
| av_packet_unref(in); |
| |
| ff_cbs_fragment_reset(&ctx->frag[ctx->idx]); |
| |
| fail: |
| if (err < 0 && err != AVERROR(EAGAIN)) |
| av1_frame_merge_flush(bsf); |
| |
| return err; |
| } |
| |
| static int av1_frame_merge_init(AVBSFContext *bsf) |
| { |
| AV1FMergeContext *ctx = bsf->priv_data; |
| int err; |
| |
| ctx->in = av_packet_alloc(); |
| ctx->pkt = av_packet_alloc(); |
| if (!ctx->in || !ctx->pkt) |
| return AVERROR(ENOMEM); |
| |
| err = ff_cbs_init(&ctx->input, AV_CODEC_ID_AV1, bsf); |
| if (err < 0) |
| return err; |
| |
| return ff_cbs_init(&ctx->output, AV_CODEC_ID_AV1, bsf); |
| } |
| |
| static void av1_frame_merge_close(AVBSFContext *bsf) |
| { |
| AV1FMergeContext *ctx = bsf->priv_data; |
| |
| ff_cbs_fragment_free(&ctx->frag[0]); |
| ff_cbs_fragment_free(&ctx->frag[1]); |
| av_packet_free(&ctx->in); |
| av_packet_free(&ctx->pkt); |
| ff_cbs_close(&ctx->input); |
| ff_cbs_close(&ctx->output); |
| } |
| |
| static const enum AVCodecID av1_frame_merge_codec_ids[] = { |
| AV_CODEC_ID_AV1, AV_CODEC_ID_NONE, |
| }; |
| |
| const AVBitStreamFilter ff_av1_frame_merge_bsf = { |
| .name = "av1_frame_merge", |
| .priv_data_size = sizeof(AV1FMergeContext), |
| .init = av1_frame_merge_init, |
| .flush = av1_frame_merge_flush, |
| .close = av1_frame_merge_close, |
| .filter = av1_frame_merge_filter, |
| .codec_ids = av1_frame_merge_codec_ids, |
| }; |