LCOV - code coverage report
Current view: top level - libavformat - flac_picture.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 53 86 61.6 %
Date: 2017-12-18 13:19:42 Functions: 1 1 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Raw FLAC picture parser
       3             :  * Copyright (c) 2001 Fabrice Bellard
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : #include "libavutil/avassert.h"
      23             : #include "avformat.h"
      24             : #include "flac_picture.h"
      25             : #include "id3v2.h"
      26             : #include "internal.h"
      27             : 
      28           3 : int ff_flac_parse_picture(AVFormatContext *s, uint8_t *buf, int buf_size)
      29             : {
      30           3 :     const CodecMime *mime = ff_id3v2_mime_tags;
      31           3 :     enum AVCodecID id = AV_CODEC_ID_NONE;
      32           3 :     AVBufferRef *data = NULL;
      33           3 :     uint8_t mimetype[64], *desc = NULL;
      34           3 :     AVIOContext *pb = NULL;
      35             :     AVStream *st;
      36           3 :     int width, height, ret = 0;
      37             :     int len;
      38             :     unsigned int type;
      39             : 
      40           3 :     pb = avio_alloc_context(buf, buf_size, 0, NULL, NULL, NULL, NULL);
      41           3 :     if (!pb)
      42           0 :         return AVERROR(ENOMEM);
      43             : 
      44             :     /* read the picture type */
      45           3 :     type = avio_rb32(pb);
      46           3 :     if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types)) {
      47           0 :         av_log(s, AV_LOG_ERROR, "Invalid picture type: %d.\n", type);
      48           0 :         if (s->error_recognition & AV_EF_EXPLODE) {
      49           0 :             RETURN_ERROR(AVERROR_INVALIDDATA);
      50             :         }
      51           0 :         type = 0;
      52             :     }
      53             : 
      54             :     /* picture mimetype */
      55           3 :     len = avio_rb32(pb);
      56           6 :     if (len <= 0 || len >= 64 ||
      57           3 :         avio_read(pb, mimetype, FFMIN(len, sizeof(mimetype) - 1)) != len) {
      58           0 :         av_log(s, AV_LOG_ERROR, "Could not read mimetype from an attached "
      59             :                "picture.\n");
      60           0 :         if (s->error_recognition & AV_EF_EXPLODE)
      61           0 :             ret = AVERROR_INVALIDDATA;
      62           0 :         goto fail;
      63             :     }
      64           3 :     av_assert0(len < sizeof(mimetype));
      65           3 :     mimetype[len] = 0;
      66             : 
      67           9 :     while (mime->id != AV_CODEC_ID_NONE) {
      68           6 :         if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
      69           3 :             id = mime->id;
      70           3 :             break;
      71             :         }
      72           3 :         mime++;
      73             :     }
      74           3 :     if (id == AV_CODEC_ID_NONE) {
      75           0 :         av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
      76             :                mimetype);
      77           0 :         if (s->error_recognition & AV_EF_EXPLODE)
      78           0 :             ret = AVERROR_INVALIDDATA;
      79           0 :         goto fail;
      80             :     }
      81             : 
      82             :     /* picture description */
      83           3 :     len = avio_rb32(pb);
      84           3 :     if (len > 0) {
      85           2 :         if (!(desc = av_malloc(len + 1))) {
      86           0 :             RETURN_ERROR(AVERROR(ENOMEM));
      87             :         }
      88             : 
      89           2 :         if (avio_read(pb, desc, len) != len) {
      90           0 :             av_log(s, AV_LOG_ERROR, "Error reading attached picture description.\n");
      91           0 :             if (s->error_recognition & AV_EF_EXPLODE)
      92           0 :                 ret = AVERROR(EIO);
      93           0 :             goto fail;
      94             :         }
      95           2 :         desc[len] = 0;
      96             :     }
      97             : 
      98             :     /* picture metadata */
      99           3 :     width  = avio_rb32(pb);
     100           3 :     height = avio_rb32(pb);
     101           3 :     avio_skip(pb, 8);
     102             : 
     103             :     /* picture data */
     104           3 :     len = avio_rb32(pb);
     105           3 :     if (len <= 0) {
     106           0 :         av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
     107           0 :         if (s->error_recognition & AV_EF_EXPLODE)
     108           0 :             ret = AVERROR_INVALIDDATA;
     109           0 :         goto fail;
     110             :     }
     111           3 :     if (!(data = av_buffer_alloc(len + AV_INPUT_BUFFER_PADDING_SIZE))) {
     112           0 :         RETURN_ERROR(AVERROR(ENOMEM));
     113             :     }
     114           3 :     memset(data->data + len, 0, AV_INPUT_BUFFER_PADDING_SIZE);
     115           3 :     if (avio_read(pb, data->data, len) != len) {
     116           0 :         av_log(s, AV_LOG_ERROR, "Error reading attached picture data.\n");
     117           0 :         if (s->error_recognition & AV_EF_EXPLODE)
     118           0 :             ret = AVERROR(EIO);
     119           0 :         goto fail;
     120             :     }
     121             : 
     122           3 :     st = avformat_new_stream(s, NULL);
     123           3 :     if (!st) {
     124           0 :         RETURN_ERROR(AVERROR(ENOMEM));
     125             :     }
     126             : 
     127           3 :     av_init_packet(&st->attached_pic);
     128           3 :     st->attached_pic.buf          = data;
     129           3 :     st->attached_pic.data         = data->data;
     130           3 :     st->attached_pic.size         = len;
     131           3 :     st->attached_pic.stream_index = st->index;
     132           3 :     st->attached_pic.flags       |= AV_PKT_FLAG_KEY;
     133             : 
     134           3 :     st->disposition      |= AV_DISPOSITION_ATTACHED_PIC;
     135           3 :     st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
     136           3 :     st->codecpar->codec_id   = id;
     137           3 :     st->codecpar->width      = width;
     138           3 :     st->codecpar->height     = height;
     139           3 :     av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0);
     140           3 :     if (desc)
     141           2 :         av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
     142             : 
     143           3 :     avio_context_free(&pb);
     144             : 
     145           3 :     return 0;
     146             : 
     147           0 : fail:
     148           0 :     av_buffer_unref(&data);
     149           0 :     av_freep(&desc);
     150           0 :     avio_context_free(&pb);
     151             : 
     152           0 :     return ret;
     153             : }

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