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