GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/hevc_parse.c Lines: 52 65 80.0 %
Date: 2019-11-22 03:34:36 Branches: 25 37 67.6 %

Line Branch Exec Source
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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 "bytestream.h"
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#include "h2645_parse.h"
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#include "hevc.h"
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#include "hevc_parse.h"
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379
static int hevc_decode_nal_units(const uint8_t *buf, int buf_size, HEVCParamSets *ps,
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                                 HEVCSEI *sei, int is_nalff, int nal_length_size,
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                                 int err_recognition, int apply_defdispwin, void *logctx)
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{
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    int i;
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379
    int ret = 0;
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379
    H2645Packet pkt = { 0 };
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379
    ret = ff_h2645_packet_split(&pkt, buf, buf_size, logctx, is_nalff,
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                                nal_length_size, AV_CODEC_ID_HEVC, 1, 0);
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379
    if (ret < 0) {
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        goto done;
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    }
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1616
    for (i = 0; i < pkt.nb_nals; i++) {
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1238
        H2645NAL *nal = &pkt.nals[i];
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        /* ignore everything except parameter sets and VCL NALUs */
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1238
        switch (nal->type) {
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371
        case HEVC_NAL_VPS:
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371
            ret = ff_hevc_decode_nal_vps(&nal->gb, logctx, ps);
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371
            if (ret < 0)
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                goto done;
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371
            break;
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368
        case HEVC_NAL_SPS:
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368
            ret = ff_hevc_decode_nal_sps(&nal->gb, logctx, ps, apply_defdispwin);
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368
            if (ret < 0)
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                goto done;
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368
            break;
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495
        case HEVC_NAL_PPS:
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495
            ret = ff_hevc_decode_nal_pps(&nal->gb, logctx, ps);
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            if (ret < 0)
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1
                goto done;
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494
            break;
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4
        case HEVC_NAL_SEI_PREFIX:
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        case HEVC_NAL_SEI_SUFFIX:
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4
            ret = ff_hevc_decode_nal_sei(&nal->gb, logctx, sei, ps, nal->type);
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4
            if (ret < 0)
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                goto done;
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4
            break;
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        default:
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            av_log(logctx, AV_LOG_VERBOSE, "Ignoring NAL type %d in extradata\n", nal->type);
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            break;
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        }
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    }
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378
done:
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379
    ff_h2645_packet_uninit(&pkt);
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379
    if (err_recognition & AV_EF_EXPLODE)
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        return ret;
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379
    return 0;
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}
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355
int ff_hevc_decode_extradata(const uint8_t *data, int size, HEVCParamSets *ps,
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                             HEVCSEI *sei, int *is_nalff, int *nal_length_size,
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                             int err_recognition, int apply_defdispwin, void *logctx)
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{
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355
    int ret = 0;
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    GetByteContext gb;
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355
    bytestream2_init(&gb, data, size);
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    if (size > 3 && (data[0] || data[1] || data[2] > 1)) {
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        /* It seems the extradata is encoded as hvcC format.
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         * Temporarily, we support configurationVersion==0 until 14496-15 3rd
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         * is finalized. When finalized, configurationVersion will be 1 and we
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         * can recognize hvcC by checking if avctx->extradata[0]==1 or not. */
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        int i, j, num_arrays, nal_len_size;
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10
        *is_nalff = 1;
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96
10
        bytestream2_skip(&gb, 21);
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10
        nal_len_size = (bytestream2_get_byte(&gb) & 3) + 1;
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10
        num_arrays   = bytestream2_get_byte(&gb);
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        /* nal units in the hvcC always have length coded with 2 bytes,
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         * so put a fake nal_length_size = 2 while parsing them */
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10
        *nal_length_size = 2;
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        /* Decode nal units from hvcC. */
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44
        for (i = 0; i < num_arrays; i++) {
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34
            int type = bytestream2_get_byte(&gb) & 0x3f;
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34
            int cnt  = bytestream2_get_be16(&gb);
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109
68
            for (j = 0; j < cnt; j++) {
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                // +2 for the nal size field
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34
                int nalsize = bytestream2_peek_be16(&gb) + 2;
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34
                if (bytestream2_get_bytes_left(&gb) < nalsize) {
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                    av_log(logctx, AV_LOG_ERROR,
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                           "Invalid NAL unit size in extradata.\n");
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                    return AVERROR_INVALIDDATA;
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                }
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118
34
                ret = hevc_decode_nal_units(gb.buffer, nalsize, ps, sei, *is_nalff,
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                                            *nal_length_size, err_recognition, apply_defdispwin,
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                                            logctx);
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34
                if (ret < 0) {
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                    av_log(logctx, AV_LOG_ERROR,
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                           "Decoding nal unit %d %d from hvcC failed\n",
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                           type, i);
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                    return ret;
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                }
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34
                bytestream2_skip(&gb, nalsize);
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            }
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        }
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131
        /* Now store right nal length size, that will be used to parse
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         * all other nals */
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10
        *nal_length_size = nal_len_size;
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    } else {
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345
        *is_nalff = 0;
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345
        ret = hevc_decode_nal_units(data, size, ps, sei, *is_nalff, *nal_length_size,
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                                    err_recognition, apply_defdispwin, logctx);
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345
        if (ret < 0)
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            return ret;
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    }
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142
355
    return ret;
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}