GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/av1_parse.c Lines: 38 45 84.4 %
Date: 2019-11-22 03:34:36 Branches: 12 20 60.0 %

Line Branch Exec Source
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/*
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 * AV1 common parsing code
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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 "config.h"
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#include "libavutil/mem.h"
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#include "av1.h"
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#include "av1_parse.h"
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#include "bytestream.h"
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int ff_av1_extract_obu(AV1OBU *obu, const uint8_t *buf, int length, void *logctx)
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{
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    int64_t obu_size;
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    int start_pos, type, temporal_id, spatial_id;
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    int len;
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    len = parse_obu_header(buf, length, &obu_size, &start_pos,
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                           &type, &temporal_id, &spatial_id);
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    if (len < 0)
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        return len;
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    obu->type        = type;
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    obu->temporal_id = temporal_id;
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    obu->spatial_id  = spatial_id;
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    obu->data     = buf + start_pos;
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    obu->size     = obu_size;
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    obu->raw_data = buf;
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    obu->raw_size = len;
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    av_log(logctx, AV_LOG_DEBUG,
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           "obu_type: %d, temporal_id: %d, spatial_id: %d, payload size: %d\n",
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           obu->type, obu->temporal_id, obu->spatial_id, obu->size);
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    return len;
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}
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int ff_av1_packet_split(AV1Packet *pkt, const uint8_t *buf, int length, void *logctx)
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{
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    GetByteContext bc;
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    int ret, consumed;
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    bytestream2_init(&bc, buf, length);
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    pkt->nb_obus = 0;
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    while (bytestream2_get_bytes_left(&bc) > 0) {
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        AV1OBU *obu;
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        if (pkt->obus_allocated < pkt->nb_obus + 1) {
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            int new_size = pkt->obus_allocated + 1;
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            AV1OBU *tmp;
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            if (new_size >= INT_MAX / sizeof(*tmp))
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                return AVERROR(ENOMEM);
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            tmp = av_fast_realloc(pkt->obus, &pkt->obus_allocated_size, new_size * sizeof(*tmp));
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            if (!tmp)
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                return AVERROR(ENOMEM);
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            pkt->obus = tmp;
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            memset(pkt->obus + pkt->obus_allocated, 0, sizeof(*pkt->obus));
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            pkt->obus_allocated = new_size;
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        }
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        obu = &pkt->obus[pkt->nb_obus];
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        consumed = ff_av1_extract_obu(obu, bc.buffer, bytestream2_get_bytes_left(&bc), logctx);
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        if (consumed < 0)
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            return consumed;
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        bytestream2_skip(&bc, consumed);
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        obu->size_bits = get_obu_bit_length(obu->data, obu->size, obu->type);
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        if (obu->size_bits < 0 || (!obu->size_bits && obu->type != AV1_OBU_TEMPORAL_DELIMITER)) {
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            av_log(logctx, AV_LOG_ERROR, "Invalid OBU of type %d, skipping.\n", obu->type);
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            continue;
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        }
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        pkt->nb_obus++;
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        ret = init_get_bits(&obu->gb, obu->data, obu->size_bits);
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        if (ret < 0)
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            return ret;
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    }
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    return 0;
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}
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void ff_av1_packet_uninit(AV1Packet *pkt)
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{
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    av_freep(&pkt->obus);
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    pkt->obus_allocated = pkt->obus_allocated_size = 0;
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}