GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/hapqa_extract_bsf.c Lines: 33 43 76.7 %
Date: 2019-11-22 03:34:36 Branches: 16 24 66.7 %

Line Branch Exec Source
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/*
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 * HAPQA extract bitstream filter
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 * Copyright (c) 2017 Jokyo Images
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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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/**
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 * @file
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 * HAPQA extract bitstream filter
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 * extract one of the two textures of the HAQA
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 */
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#include "avcodec.h"
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#include "bsf.h"
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#include "bytestream.h"
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#include "hap.h"
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typedef struct HapqaExtractContext {
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    const AVClass *class;
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    int texture;/* index of the texture to keep (0 for rgb or 1 for alpha) */
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} HapqaExtractContext;
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static int check_texture(HapqaExtractContext *ctx, int section_type) {
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    if (((ctx->texture == 0)&&((section_type & 0x0F) == 0x0F)) || /* HapQ texture and rgb extract */
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        ((ctx->texture == 1)&&((section_type & 0x0F) == 0x01))) /* HapAlphaOnly texture and alpha extract */
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    {
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        return 1; /* the texture is the one to keep */
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    } else {
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3
        return 0;
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    }
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}
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static int hapqa_extract(AVBSFContext *bsf, AVPacket *pkt)
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{
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    HapqaExtractContext *ctx = bsf->priv_data;
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    GetByteContext gbc;
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    int section_size;
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    enum HapSectionType section_type;
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    int start_section_size;
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    int target_packet_size = 0;
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    int ret = 0;
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    ret = ff_bsf_get_packet_ref(bsf, pkt);
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    if (ret < 0)
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        return ret;
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    bytestream2_init(&gbc, pkt->data, pkt->size);
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    ret = ff_hap_parse_section_header(&gbc, &section_size, &section_type);
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    if (ret != 0)
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        goto fail;
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    if ((section_type & 0x0F) != 0x0D) {
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        av_log(bsf, AV_LOG_ERROR, "Invalid section type for HAPQA %#04x.\n", section_type & 0x0F);
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        ret = AVERROR_INVALIDDATA;
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        goto fail;
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    }
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    start_section_size = 4;
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    bytestream2_seek(&gbc, start_section_size, SEEK_SET);/* go to start of the first texture */
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    ret = ff_hap_parse_section_header(&gbc, &section_size, &section_type);
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    if (ret != 0)
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        goto fail;
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    target_packet_size = section_size + 4;
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    if (check_texture(ctx, section_type) == 0) { /* the texture is not the one to keep */
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        start_section_size += 4 + section_size;
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        bytestream2_seek(&gbc, start_section_size, SEEK_SET);/* go to start of the second texture */
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        ret = ff_hap_parse_section_header(&gbc, &section_size, &section_type);
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        if (ret != 0)
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            goto fail;
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        target_packet_size = section_size + 4;
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        if (check_texture(ctx, section_type) == 0){ /* the second texture is not the one to keep */
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            av_log(bsf, AV_LOG_ERROR, "No valid texture found.\n");
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            ret = AVERROR_INVALIDDATA;
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            goto fail;
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        }
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    }
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    pkt->data += start_section_size;
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    pkt->size = target_packet_size;
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fail:
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    if (ret < 0)
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        av_packet_unref(pkt);
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    return ret;
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}
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static const enum AVCodecID codec_ids[] = {
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    AV_CODEC_ID_HAP, AV_CODEC_ID_NONE,
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};
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#define OFFSET(x) offsetof(HapqaExtractContext, x)
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#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_BSF_PARAM)
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static const AVOption options[] = {
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    { "texture", "texture to keep", OFFSET(texture), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS, "texture" },
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        { "color", "keep HapQ texture",         0, AV_OPT_TYPE_CONST, { .i64 = 0 }, 0, 0, FLAGS, "texture" },
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        { "alpha", "keep HapAlphaOnly texture", 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, 0, 0, FLAGS, "texture" },
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    { NULL },
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};
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static const AVClass hapqa_extract_class = {
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    .class_name = "hapqa_extract_bsf",
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    .item_name  = av_default_item_name,
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    .option     = options,
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    .version    = LIBAVUTIL_VERSION_INT,
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};
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const AVBitStreamFilter ff_hapqa_extract_bsf = {
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    .name       = "hapqa_extract",
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    .filter     = hapqa_extract,
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    .priv_data_size = sizeof(HapqaExtractContext),
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    .priv_class = &hapqa_extract_class,
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    .codec_ids  = codec_ids,
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};