GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/av1_frame_merge_bsf.c Lines: 45 69 65.2 %
Date: 2019-12-07 16:49:47 Branches: 26 40 65.0 %

Line Branch Exec Source
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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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24
    AV1FMergeContext *ctx = bsf->priv_data;
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24
    CodedBitstreamFragment *frag = &ctx->frag[ctx->idx], *tu = &ctx->frag[!ctx->idx];
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24
    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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24
    if (err < 0) {
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2
        if (err == AVERROR_EOF && tu->nb_units > 0)
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1
            goto eof;
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1
        return err;
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    }
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22
    err = ff_cbs_read_packet(ctx->cbc, frag, in);
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22
    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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9
eof:
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10
        err = ff_cbs_write_packet(ctx->cbc, buffer_pkt, tu);
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10
        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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10
        av_packet_move_ref(out, buffer_pkt);
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        // Swap fragment index, to avoid copying fragment references.
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10
        ctx->idx = !ctx->idx;
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    } else {
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26
        for (i = 0; i < frag->nb_units; i++) {
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13
            err = ff_cbs_insert_unit_content(ctx->cbc, tu, -1, frag->units[i].type,
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13
                                             frag->units[i].content, frag->units[i].content_ref);
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13
            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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23
    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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23
        av_packet_unref(in);
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111
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    ff_cbs_fragment_reset(ctx->cbc, &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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1
static int av1_frame_merge_init(AVBSFContext *bsf)
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{
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1
    AV1FMergeContext *ctx = bsf->priv_data;
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1
    ctx->in  = av_packet_alloc();
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1
    ctx->pkt = av_packet_alloc();
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1
    if (!ctx->in || !ctx->pkt)
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        return AVERROR(ENOMEM);
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1
    return ff_cbs_init(&ctx->cbc, AV_CODEC_ID_AV1, bsf);
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}
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1
static void av1_frame_merge_close(AVBSFContext *bsf)
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{
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1
    AV1FMergeContext *ctx = bsf->priv_data;
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1
    ff_cbs_fragment_free(ctx->cbc, &ctx->frag[0]);
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1
    ff_cbs_fragment_free(ctx->cbc, &ctx->frag[1]);
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1
    av_packet_free(&ctx->in);
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1
    av_packet_free(&ctx->pkt);
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1
    ff_cbs_close(&ctx->cbc);
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1
}
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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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};