mirror of
https://github.com/FFmpeg/FFmpeg.git
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0e4dfa4709
This reverts commit 41b73ae883
.
This patch was pushed extremely quickly, without giving developers the
time to object.
168 lines
5.0 KiB
C
168 lines
5.0 KiB
C
/*
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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 "bsf.h"
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#include "bsf_internal.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 *input;
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CodedBitstreamContext *output;
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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->frag[0]);
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ff_cbs_fragment_reset(&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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if (err < 0) {
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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->input, frag, in);
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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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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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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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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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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->output, buffer_pkt, tu);
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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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for (i = 0; i < frag->nb_units; i++) {
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err = ff_cbs_insert_unit_content(tu, -1, frag->units[i].type,
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frag->units[i].content, frag->units[i].content_ref);
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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)
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* or any packet if buffer_pkt is empty. The latter is needed to
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* passthrough positions in case there are no timestamps like with
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* the raw OBU demuxer. */
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if (!buffer_pkt->data ||
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in->pts != AV_NOPTS_VALUE && buffer_pkt->pts == AV_NOPTS_VALUE) {
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av_packet_unref(buffer_pkt);
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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->frag[ctx->idx]);
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fail:
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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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int err;
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ctx->in = av_packet_alloc();
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ctx->pkt = av_packet_alloc();
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if (!ctx->in || !ctx->pkt)
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return AVERROR(ENOMEM);
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err = ff_cbs_init(&ctx->input, AV_CODEC_ID_AV1, bsf);
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if (err < 0)
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return err;
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return ff_cbs_init(&ctx->output, 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->frag[0]);
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ff_cbs_fragment_free(&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->input);
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ff_cbs_close(&ctx->output);
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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 FFBitStreamFilter ff_av1_frame_merge_bsf = {
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.p.name = "av1_frame_merge",
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.p.codec_ids = av1_frame_merge_codec_ids,
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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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};
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