LCOV - code coverage report
Current view: top level - libavformat - iff.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 160 516 31.0 %
Date: 2017-12-14 01:15:32 Functions: 4 8 50.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2008 Jaikrishnan Menon <realityman@gmx.net>
       3             :  * Copyright (c) 2010 Peter Ross <pross@xvid.org>
       4             :  * Copyright (c) 2010 Sebastian Vater <cdgs.basty@googlemail.com>
       5             :  *
       6             :  * This file is part of FFmpeg.
       7             :  *
       8             :  * FFmpeg is free software; you can redistribute it and/or
       9             :  * modify it under the terms of the GNU Lesser General Public
      10             :  * License as published by the Free Software Foundation; either
      11             :  * version 2.1 of the License, or (at your option) any later version.
      12             :  *
      13             :  * FFmpeg is distributed in the hope that it will be useful,
      14             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      15             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      16             :  * Lesser General Public License for more details.
      17             :  *
      18             :  * You should have received a copy of the GNU Lesser General Public
      19             :  * License along with FFmpeg; if not, write to the Free Software
      20             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      21             :  */
      22             : 
      23             : /**
      24             :  * @file
      25             :  * IFF file demuxer
      26             :  * by Jaikrishnan Menon
      27             :  * for more information on the .iff file format, visit:
      28             :  * http://wiki.multimedia.cx/index.php?title=IFF
      29             :  */
      30             : 
      31             : #include <inttypes.h>
      32             : 
      33             : #include "libavutil/avassert.h"
      34             : #include "libavutil/channel_layout.h"
      35             : #include "libavutil/intreadwrite.h"
      36             : #include "libavutil/dict.h"
      37             : #include "libavcodec/bytestream.h"
      38             : #include "avformat.h"
      39             : #include "id3v2.h"
      40             : #include "internal.h"
      41             : 
      42             : #define ID_8SVX       MKTAG('8','S','V','X')
      43             : #define ID_16SV       MKTAG('1','6','S','V')
      44             : #define ID_MAUD       MKTAG('M','A','U','D')
      45             : #define ID_MHDR       MKTAG('M','H','D','R')
      46             : #define ID_MDAT       MKTAG('M','D','A','T')
      47             : #define ID_VHDR       MKTAG('V','H','D','R')
      48             : #define ID_ATAK       MKTAG('A','T','A','K')
      49             : #define ID_RLSE       MKTAG('R','L','S','E')
      50             : #define ID_CHAN       MKTAG('C','H','A','N')
      51             : #define ID_PBM        MKTAG('P','B','M',' ')
      52             : #define ID_ILBM       MKTAG('I','L','B','M')
      53             : #define ID_BMHD       MKTAG('B','M','H','D')
      54             : #define ID_DGBL       MKTAG('D','G','B','L')
      55             : #define ID_CAMG       MKTAG('C','A','M','G')
      56             : #define ID_CMAP       MKTAG('C','M','A','P')
      57             : #define ID_ACBM       MKTAG('A','C','B','M')
      58             : #define ID_DEEP       MKTAG('D','E','E','P')
      59             : #define ID_RGB8       MKTAG('R','G','B','8')
      60             : #define ID_RGBN       MKTAG('R','G','B','N')
      61             : #define ID_DSD        MKTAG('D','S','D',' ')
      62             : #define ID_DST        MKTAG('D','S','T',' ')
      63             : #define ID_DSTC       MKTAG('D','S','T','C')
      64             : #define ID_DSTF       MKTAG('D','S','T','F')
      65             : #define ID_FRTE       MKTAG('F','R','T','E')
      66             : #define ID_ANIM       MKTAG('A','N','I','M')
      67             : #define ID_ANHD       MKTAG('A','N','H','D')
      68             : #define ID_DLTA       MKTAG('D','L','T','A')
      69             : #define ID_DPAN       MKTAG('D','P','A','N')
      70             : 
      71             : #define ID_FORM       MKTAG('F','O','R','M')
      72             : #define ID_FRM8       MKTAG('F','R','M','8')
      73             : #define ID_ANNO       MKTAG('A','N','N','O')
      74             : #define ID_AUTH       MKTAG('A','U','T','H')
      75             : #define ID_CHRS       MKTAG('C','H','R','S')
      76             : #define ID_COPYRIGHT  MKTAG('(','c',')',' ')
      77             : #define ID_CSET       MKTAG('C','S','E','T')
      78             : #define ID_FVER       MKTAG('F','V','E','R')
      79             : #define ID_NAME       MKTAG('N','A','M','E')
      80             : #define ID_TEXT       MKTAG('T','E','X','T')
      81             : #define ID_ABIT       MKTAG('A','B','I','T')
      82             : #define ID_BODY       MKTAG('B','O','D','Y')
      83             : #define ID_DBOD       MKTAG('D','B','O','D')
      84             : #define ID_DPEL       MKTAG('D','P','E','L')
      85             : #define ID_DLOC       MKTAG('D','L','O','C')
      86             : #define ID_TVDC       MKTAG('T','V','D','C')
      87             : 
      88             : #define LEFT    2
      89             : #define RIGHT   4
      90             : #define STEREO  6
      91             : 
      92             : /**
      93             :  * This number of bytes if added at the beginning of each AVPacket
      94             :  * which contain additional information about video properties
      95             :  * which has to be shared between demuxer and decoder.
      96             :  * This number may change between frames, e.g. the demuxer might
      97             :  * set it to smallest possible size of 2 to indicate that there's
      98             :  * no extradata changing in this frame.
      99             :  */
     100             : #define IFF_EXTRA_VIDEO_SIZE 41
     101             : 
     102             : typedef enum {
     103             :     COMP_NONE,
     104             :     COMP_FIB,
     105             :     COMP_EXP
     106             : } svx8_compression_type;
     107             : 
     108             : typedef struct IffDemuxContext {
     109             :     int      is_64bit;  ///< chunk size is 64-bit
     110             :     int64_t  body_pos;
     111             :     int64_t  body_end;
     112             :     uint32_t  body_size;
     113             :     svx8_compression_type   svx8_compression;
     114             :     unsigned  maud_bits;
     115             :     unsigned  maud_compression;
     116             :     unsigned  bitmap_compression;  ///< delta compression method used
     117             :     unsigned  bpp;          ///< bits per plane to decode (differs from bits_per_coded_sample if HAM)
     118             :     unsigned  ham;          ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise)
     119             :     unsigned  flags;        ///< 1 for EHB, 0 is no extra half darkening
     120             :     unsigned  transparency; ///< transparency color index in palette
     121             :     unsigned  masking;      ///< masking method used
     122             :     uint8_t   tvdc[32];     ///< TVDC lookup table
     123             :     int64_t   pts;
     124             : } IffDemuxContext;
     125             : 
     126             : /* Metadata string read */
     127           2 : static int get_metadata(AVFormatContext *s,
     128             :                         const char *const tag,
     129             :                         const unsigned data_size)
     130             : {
     131           2 :     uint8_t *buf = ((data_size + 1) == 0) ? NULL : av_malloc(data_size + 1);
     132             : 
     133           2 :     if (!buf)
     134           0 :         return AVERROR(ENOMEM);
     135             : 
     136           2 :     if (avio_read(s->pb, buf, data_size) != data_size) {
     137           0 :         av_free(buf);
     138           0 :         return AVERROR(EIO);
     139             :     }
     140           2 :     buf[data_size] = 0;
     141           2 :     av_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL);
     142           2 :     return 0;
     143             : }
     144             : 
     145        6130 : static int iff_probe(AVProbeData *p)
     146             : {
     147        6130 :     const uint8_t *d = p->buf;
     148             : 
     149        6144 :     if ( (AV_RL32(d)   == ID_FORM &&
     150          27 :          (AV_RL32(d+8) == ID_8SVX ||
     151          26 :           AV_RL32(d+8) == ID_16SV ||
     152          26 :           AV_RL32(d+8) == ID_MAUD ||
     153          25 :           AV_RL32(d+8) == ID_PBM  ||
     154          24 :           AV_RL32(d+8) == ID_ACBM ||
     155          24 :           AV_RL32(d+8) == ID_DEEP ||
     156          23 :           AV_RL32(d+8) == ID_ILBM ||
     157          22 :           AV_RL32(d+8) == ID_RGB8 ||
     158          22 :           AV_RL32(d+8) == ID_ANIM ||
     159        6138 :           AV_RL32(d+8) == ID_RGBN)) ||
     160        6127 :          (AV_RL32(d) == ID_FRM8 && AV_RL32(d+12) == ID_DSD))
     161           3 :         return AVPROBE_SCORE_MAX;
     162        6127 :     return 0;
     163             : }
     164             : 
     165             : static const AVCodecTag dsd_codec_tags[] = {
     166             :     { AV_CODEC_ID_DSD_MSBF, ID_DSD },
     167             :     { AV_CODEC_ID_DST,      ID_DST },
     168             :     { AV_CODEC_ID_NONE, 0 },
     169             : };
     170             : 
     171             : 
     172             : #define DSD_SLFT MKTAG('S','L','F','T')
     173             : #define DSD_SRGT MKTAG('S','R','G','T')
     174             : #define DSD_MLFT MKTAG('M','L','F','T')
     175             : #define DSD_MRGT MKTAG('M','R','G','T')
     176             : #define DSD_C    MKTAG('C',' ',' ',' ')
     177             : #define DSD_LS   MKTAG('L','S',' ',' ')
     178             : #define DSD_RS   MKTAG('R','S',' ',' ')
     179             : #define DSD_LFE  MKTAG('L','F','E',' ')
     180             : 
     181             : static const uint32_t dsd_stereo[]  = { DSD_SLFT, DSD_SRGT };
     182             : static const uint32_t dsd_5point0[] = { DSD_MLFT, DSD_MRGT, DSD_C, DSD_LS, DSD_RS };
     183             : static const uint32_t dsd_5point1[] = { DSD_MLFT, DSD_MRGT, DSD_C, DSD_LFE, DSD_LS, DSD_RS };
     184             : 
     185             : typedef struct {
     186             :     uint64_t layout;
     187             :     const uint32_t * dsd_layout;
     188             : } DSDLayoutDesc;
     189             : 
     190             : static const DSDLayoutDesc dsd_channel_layout[] = {
     191             :     { AV_CH_LAYOUT_STEREO,  dsd_stereo },
     192             :     { AV_CH_LAYOUT_5POINT0, dsd_5point0 },
     193             :     { AV_CH_LAYOUT_5POINT1, dsd_5point1 },
     194             : };
     195             : 
     196             : static const uint64_t dsd_loudspeaker_config[] = {
     197             :     AV_CH_LAYOUT_STEREO,
     198             :     0, 0,
     199             :     AV_CH_LAYOUT_5POINT0, AV_CH_LAYOUT_5POINT1,
     200             : };
     201             : 
     202             : static const char * dsd_source_comment[] = {
     203             :     "dsd_source_comment",
     204             :     "analogue_source_comment",
     205             :     "pcm_source_comment",
     206             : };
     207             : 
     208             : static const char * dsd_history_comment[] = {
     209             :     "general_remark",
     210             :     "operator_name",
     211             :     "creating_machine",
     212             :     "timezone",
     213             :     "file_revision"
     214             : };
     215             : 
     216           0 : static int parse_dsd_diin(AVFormatContext *s, AVStream *st, uint64_t eof)
     217             : {
     218           0 :     AVIOContext *pb = s->pb;
     219             : 
     220           0 :     while (avio_tell(pb) + 12 <= eof && !avio_feof(pb)) {
     221           0 :         uint32_t tag      = avio_rl32(pb);
     222           0 :         uint64_t size     = avio_rb64(pb);
     223           0 :         uint64_t orig_pos = avio_tell(pb);
     224           0 :         const char * metadata_tag = NULL;
     225             : 
     226           0 :         switch(tag) {
     227           0 :         case MKTAG('D','I','A','R'): metadata_tag = "artist"; break;
     228           0 :         case MKTAG('D','I','T','I'): metadata_tag = "title";  break;
     229             :         }
     230             : 
     231           0 :         if (metadata_tag && size > 4) {
     232           0 :             unsigned int tag_size = avio_rb32(pb);
     233           0 :             int ret = get_metadata(s, metadata_tag, FFMIN(tag_size, size - 4));
     234           0 :             if (ret < 0) {
     235           0 :                 av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag);
     236           0 :                 return ret;
     237             :             }
     238             :         }
     239             : 
     240           0 :         avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1));
     241             :     }
     242             : 
     243           0 :     return 0;
     244             : }
     245             : 
     246           0 : static int parse_dsd_prop(AVFormatContext *s, AVStream *st, uint64_t eof)
     247             : {
     248           0 :     AVIOContext *pb = s->pb;
     249             :     char abss[24];
     250             :     int hour, min, sec, i, ret, config;
     251             :     int dsd_layout[6];
     252             :     ID3v2ExtraMeta *id3v2_extra_meta;
     253             : 
     254           0 :     while (avio_tell(pb) + 12 <= eof && !avio_feof(pb)) {
     255           0 :         uint32_t tag      = avio_rl32(pb);
     256           0 :         uint64_t size     = avio_rb64(pb);
     257           0 :         uint64_t orig_pos = avio_tell(pb);
     258             : 
     259           0 :         switch(tag) {
     260           0 :         case MKTAG('A','B','S','S'):
     261           0 :             if (size < 8)
     262           0 :                 return AVERROR_INVALIDDATA;
     263           0 :             hour = avio_rb16(pb);
     264           0 :             min  = avio_r8(pb);
     265           0 :             sec  = avio_r8(pb);
     266           0 :             snprintf(abss, sizeof(abss), "%02dh:%02dm:%02ds:%d", hour, min, sec, avio_rb32(pb));
     267           0 :             av_dict_set(&st->metadata, "absolute_start_time", abss, 0);
     268           0 :             break;
     269             : 
     270           0 :         case MKTAG('C','H','N','L'):
     271           0 :             if (size < 2)
     272           0 :                 return AVERROR_INVALIDDATA;
     273           0 :             st->codecpar->channels       = avio_rb16(pb);
     274           0 :             if (size < 2 + st->codecpar->channels * 4)
     275           0 :                 return AVERROR_INVALIDDATA;
     276           0 :             st->codecpar->channel_layout = 0;
     277           0 :             if (st->codecpar->channels > FF_ARRAY_ELEMS(dsd_layout)) {
     278           0 :                 avpriv_request_sample(s, "channel layout");
     279           0 :                 break;
     280             :             }
     281           0 :             for (i = 0; i < st->codecpar->channels; i++)
     282           0 :                 dsd_layout[i] = avio_rl32(pb);
     283           0 :             for (i = 0; i < FF_ARRAY_ELEMS(dsd_channel_layout); i++) {
     284           0 :                 const DSDLayoutDesc * d = &dsd_channel_layout[i];
     285           0 :                 if (av_get_channel_layout_nb_channels(d->layout) == st->codecpar->channels &&
     286           0 :                     !memcmp(d->dsd_layout, dsd_layout, st->codecpar->channels * sizeof(uint32_t))) {
     287           0 :                     st->codecpar->channel_layout = d->layout;
     288           0 :                     break;
     289             :                 }
     290             :             }
     291           0 :             break;
     292             : 
     293           0 :         case MKTAG('C','M','P','R'):
     294           0 :             if (size < 4)
     295           0 :                 return AVERROR_INVALIDDATA;
     296           0 :             st->codecpar->codec_tag = tag = avio_rl32(pb);
     297           0 :             st->codecpar->codec_id = ff_codec_get_id(dsd_codec_tags, tag);
     298           0 :             if (!st->codecpar->codec_id) {
     299           0 :                 av_log(s, AV_LOG_ERROR, "'%s' compression is not supported\n",
     300           0 :                        av_fourcc2str(tag));
     301           0 :                 return AVERROR_PATCHWELCOME;
     302             :             }
     303           0 :             break;
     304             : 
     305           0 :         case MKTAG('F','S',' ',' '):
     306           0 :             if (size < 4)
     307           0 :                 return AVERROR_INVALIDDATA;
     308           0 :             st->codecpar->sample_rate = avio_rb32(pb) / 8;
     309           0 :             break;
     310             : 
     311           0 :         case MKTAG('I','D','3',' '):
     312           0 :             id3v2_extra_meta = NULL;
     313           0 :             ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, size);
     314           0 :             if (id3v2_extra_meta) {
     315           0 :                 if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0 ||
     316             :                     (ret = ff_id3v2_parse_chapters(s, &id3v2_extra_meta)) < 0) {
     317           0 :                     ff_id3v2_free_extra_meta(&id3v2_extra_meta);
     318           0 :                     return ret;
     319             :                 }
     320           0 :                 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
     321             :             }
     322             : 
     323           0 :             if (size < avio_tell(pb) - orig_pos) {
     324           0 :                 av_log(s, AV_LOG_ERROR, "id3 exceeds chunk size\n");
     325           0 :                 return AVERROR_INVALIDDATA;
     326             :             }
     327           0 :             break;
     328             : 
     329           0 :         case MKTAG('L','S','C','O'):
     330           0 :             if (size < 2)
     331           0 :                 return AVERROR_INVALIDDATA;
     332           0 :             config = avio_rb16(pb);
     333           0 :             if (config != 0xFFFF) {
     334           0 :                 if (config < FF_ARRAY_ELEMS(dsd_loudspeaker_config))
     335           0 :                     st->codecpar->channel_layout = dsd_loudspeaker_config[config];
     336           0 :                 if (!st->codecpar->channel_layout)
     337           0 :                     avpriv_request_sample(s, "loudspeaker configuration %d", config);
     338             :             }
     339           0 :             break;
     340             :         }
     341             : 
     342           0 :         avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1));
     343             :     }
     344             : 
     345           0 :     return 0;
     346             : }
     347             : 
     348           0 : static int read_dst_frame(AVFormatContext *s, AVPacket *pkt)
     349             : {
     350           0 :     IffDemuxContext *iff = s->priv_data;
     351           0 :     AVIOContext *pb = s->pb;
     352             :     uint32_t chunk_id;
     353             :     uint64_t chunk_pos, data_pos, data_size;
     354           0 :     int ret = AVERROR_EOF;
     355             : 
     356           0 :     while (!avio_feof(pb)) {
     357           0 :         chunk_pos = avio_tell(pb);
     358           0 :         if (chunk_pos >= iff->body_end)
     359           0 :             return AVERROR_EOF;
     360             : 
     361           0 :         chunk_id = avio_rl32(pb);
     362           0 :         data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb);
     363           0 :         data_pos = avio_tell(pb);
     364             : 
     365           0 :         if (data_size < 1)
     366           0 :             return AVERROR_INVALIDDATA;
     367             : 
     368           0 :         switch (chunk_id) {
     369           0 :         case ID_DSTF:
     370           0 :             if (!pkt) {
     371           0 :                 iff->body_pos  = avio_tell(pb) - (iff->is_64bit ? 12 : 8);
     372           0 :                 iff->body_size = iff->body_end - iff->body_pos;
     373           0 :                 return 0;
     374             :             }
     375           0 :             ret = av_get_packet(pb, pkt, data_size);
     376           0 :             if (ret < 0)
     377           0 :                 return ret;
     378           0 :             if (data_size & 1)
     379           0 :                 avio_skip(pb, 1);
     380           0 :             pkt->flags |= AV_PKT_FLAG_KEY;
     381           0 :             pkt->stream_index = 0;
     382           0 :             pkt->duration = 588 * s->streams[0]->codecpar->sample_rate / 44100;
     383           0 :             pkt->pos = chunk_pos;
     384             : 
     385           0 :             chunk_pos = avio_tell(pb);
     386           0 :             if (chunk_pos >= iff->body_end)
     387           0 :                 return 0;
     388             : 
     389           0 :             avio_seek(pb, chunk_pos, SEEK_SET);
     390           0 :             return 0;
     391             : 
     392           0 :         case ID_FRTE:
     393           0 :             if (data_size < 4)
     394           0 :                 return AVERROR_INVALIDDATA;
     395           0 :             s->streams[0]->duration = avio_rb32(pb) * 588LL * s->streams[0]->codecpar->sample_rate / 44100;
     396           0 :             break;
     397             :         }
     398             : 
     399           0 :         avio_skip(pb, data_size - (avio_tell(pb) - data_pos) + (data_size & 1));
     400             :     }
     401             : 
     402           0 :     return ret;
     403             : }
     404             : 
     405             : static const uint8_t deep_rgb24[] = {0, 0, 0, 3, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
     406             : static const uint8_t deep_rgba[]  = {0, 0, 0, 4, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
     407             : static const uint8_t deep_bgra[]  = {0, 0, 0, 4, 0, 3, 0, 8, 0, 2, 0, 8, 0, 1, 0, 8};
     408             : static const uint8_t deep_argb[]  = {0, 0, 0, 4, 0,17, 0, 8, 0, 1, 0, 8, 0, 2, 0, 8};
     409             : static const uint8_t deep_abgr[]  = {0, 0, 0, 4, 0,17, 0, 8, 0, 3, 0, 8, 0, 2, 0, 8};
     410             : 
     411           3 : static int iff_read_header(AVFormatContext *s)
     412             : {
     413           3 :     IffDemuxContext *iff = s->priv_data;
     414           3 :     AVIOContext *pb = s->pb;
     415             :     AVStream *st;
     416             :     uint8_t *buf;
     417             :     uint32_t chunk_id;
     418             :     uint64_t data_size;
     419           3 :     uint32_t screenmode = 0, num, den;
     420           3 :     unsigned transparency = 0;
     421           3 :     unsigned masking = 0; // no mask
     422             :     uint8_t fmt[16];
     423             :     int fmt_size;
     424             : 
     425           3 :     st = avformat_new_stream(s, NULL);
     426           3 :     if (!st)
     427           0 :         return AVERROR(ENOMEM);
     428             : 
     429           3 :     st->codecpar->channels = 1;
     430           3 :     st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
     431           3 :     iff->is_64bit = avio_rl32(pb) == ID_FRM8;
     432           3 :     avio_skip(pb, iff->is_64bit ? 8 : 4);
     433             :     // codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content
     434           3 :     st->codecpar->codec_tag = avio_rl32(pb);
     435           3 :     if (st->codecpar->codec_tag == ID_ANIM) {
     436           0 :         avio_skip(pb, 12);
     437             :     }
     438           3 :     iff->bitmap_compression = -1;
     439           3 :     iff->svx8_compression = -1;
     440           3 :     iff->maud_bits = -1;
     441           3 :     iff->maud_compression = -1;
     442             : 
     443          39 :     while(!avio_feof(pb)) {
     444             :         uint64_t orig_pos;
     445             :         int res;
     446          33 :         const char *metadata_tag = NULL;
     447             :         int version, nb_comments, i;
     448          33 :         chunk_id = avio_rl32(pb);
     449          33 :         data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb);
     450          33 :         orig_pos = avio_tell(pb);
     451             : 
     452          33 :         switch(chunk_id) {
     453           1 :         case ID_VHDR:
     454           1 :             st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
     455             : 
     456           1 :             if (data_size < 14)
     457           0 :                 return AVERROR_INVALIDDATA;
     458           1 :             avio_skip(pb, 12);
     459           1 :             st->codecpar->sample_rate = avio_rb16(pb);
     460           1 :             if (data_size >= 16) {
     461           1 :                 avio_skip(pb, 1);
     462           1 :                 iff->svx8_compression = avio_r8(pb);
     463             :             }
     464           1 :             break;
     465             : 
     466           0 :         case ID_MHDR:
     467           0 :             st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
     468             : 
     469           0 :             if (data_size < 32)
     470           0 :                 return AVERROR_INVALIDDATA;
     471           0 :             avio_skip(pb, 4);
     472           0 :             iff->maud_bits = avio_rb16(pb);
     473           0 :             avio_skip(pb, 2);
     474           0 :             num = avio_rb32(pb);
     475           0 :             den = avio_rb16(pb);
     476           0 :             if (!den)
     477           0 :                 return AVERROR_INVALIDDATA;
     478           0 :             avio_skip(pb, 2);
     479           0 :             st->codecpar->sample_rate = num / den;
     480           0 :             st->codecpar->channels = avio_rb16(pb);
     481           0 :             iff->maud_compression = avio_rb16(pb);
     482           0 :             if (st->codecpar->channels == 1)
     483           0 :                 st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
     484           0 :             else if (st->codecpar->channels == 2)
     485           0 :                 st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
     486           0 :             break;
     487             : 
     488           3 :         case ID_ABIT:
     489             :         case ID_BODY:
     490             :         case ID_DBOD:
     491             :         case ID_DSD:
     492             :         case ID_DST:
     493             :         case ID_MDAT:
     494           3 :             iff->body_pos = avio_tell(pb);
     495           3 :             iff->body_end = iff->body_pos + data_size;
     496           3 :             iff->body_size = data_size;
     497           3 :             if (chunk_id == ID_DST) {
     498           0 :                 int ret = read_dst_frame(s, NULL);
     499           0 :                 if (ret < 0)
     500           0 :                     return ret;
     501             :             }
     502           3 :             break;
     503             : 
     504           0 :         case ID_CHAN:
     505           0 :             if (data_size < 4)
     506           0 :                 return AVERROR_INVALIDDATA;
     507           0 :             if (avio_rb32(pb) < 6) {
     508           0 :                 st->codecpar->channels       = 1;
     509           0 :                 st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
     510             :             } else {
     511           0 :                 st->codecpar->channels       = 2;
     512           0 :                 st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
     513             :             }
     514           0 :             break;
     515             : 
     516           1 :         case ID_CAMG:
     517           1 :             if (data_size < 4)
     518           0 :                 return AVERROR_INVALIDDATA;
     519           1 :             screenmode                = avio_rb32(pb);
     520           1 :             break;
     521             : 
     522           2 :         case ID_CMAP:
     523           2 :             if (data_size < 3 || data_size > 768 || data_size % 3) {
     524           0 :                  av_log(s, AV_LOG_ERROR, "Invalid CMAP chunk size %"PRIu64"\n",
     525             :                         data_size);
     526           0 :                  return AVERROR_INVALIDDATA;
     527             :             }
     528           2 :             st->codecpar->extradata_size = data_size + IFF_EXTRA_VIDEO_SIZE;
     529           2 :             st->codecpar->extradata      = av_malloc(data_size + IFF_EXTRA_VIDEO_SIZE + AV_INPUT_BUFFER_PADDING_SIZE);
     530           2 :             if (!st->codecpar->extradata)
     531           0 :                 return AVERROR(ENOMEM);
     532           2 :             if (avio_read(pb, st->codecpar->extradata + IFF_EXTRA_VIDEO_SIZE, data_size) < 0)
     533           0 :                 return AVERROR(EIO);
     534           2 :             break;
     535             : 
     536           2 :         case ID_BMHD:
     537           2 :             st->codecpar->codec_type            = AVMEDIA_TYPE_VIDEO;
     538           2 :             if (data_size <= 8)
     539           0 :                 return AVERROR_INVALIDDATA;
     540           2 :             st->codecpar->width                 = avio_rb16(pb);
     541           2 :             st->codecpar->height                = avio_rb16(pb);
     542           2 :             avio_skip(pb, 4); // x, y offset
     543           2 :             st->codecpar->bits_per_coded_sample = avio_r8(pb);
     544           2 :             if (data_size >= 10)
     545           2 :                 masking                      = avio_r8(pb);
     546           2 :             if (data_size >= 11)
     547           2 :                 iff->bitmap_compression      = avio_r8(pb);
     548           2 :             if (data_size >= 14) {
     549           2 :                 avio_skip(pb, 1); // padding
     550           2 :                 transparency                 = avio_rb16(pb);
     551             :             }
     552           2 :             if (data_size >= 16) {
     553           2 :                 st->sample_aspect_ratio.num  = avio_r8(pb);
     554           2 :                 st->sample_aspect_ratio.den  = avio_r8(pb);
     555             :             }
     556           2 :             break;
     557             : 
     558           0 :         case ID_ANHD:
     559           0 :             break;
     560             : 
     561           0 :         case ID_DPAN:
     562           0 :             avio_skip(pb, 2);
     563           0 :             st->duration = avio_rb16(pb);
     564           0 :             break;
     565             : 
     566           0 :         case ID_DPEL:
     567           0 :             if (data_size < 4 || (data_size & 3))
     568           0 :                 return AVERROR_INVALIDDATA;
     569           0 :             if ((fmt_size = avio_read(pb, fmt, sizeof(fmt))) < 0)
     570           0 :                 return fmt_size;
     571           0 :             if (fmt_size == sizeof(deep_rgb24) && !memcmp(fmt, deep_rgb24, sizeof(deep_rgb24)))
     572           0 :                 st->codecpar->format = AV_PIX_FMT_RGB24;
     573           0 :             else if (fmt_size == sizeof(deep_rgba) && !memcmp(fmt, deep_rgba, sizeof(deep_rgba)))
     574           0 :                 st->codecpar->format = AV_PIX_FMT_RGBA;
     575           0 :             else if (fmt_size == sizeof(deep_bgra) && !memcmp(fmt, deep_bgra, sizeof(deep_bgra)))
     576           0 :                 st->codecpar->format = AV_PIX_FMT_BGRA;
     577           0 :             else if (fmt_size == sizeof(deep_argb) && !memcmp(fmt, deep_argb, sizeof(deep_argb)))
     578           0 :                 st->codecpar->format = AV_PIX_FMT_ARGB;
     579           0 :             else if (fmt_size == sizeof(deep_abgr) && !memcmp(fmt, deep_abgr, sizeof(deep_abgr)))
     580           0 :                 st->codecpar->format = AV_PIX_FMT_ABGR;
     581             :             else {
     582           0 :                 avpriv_request_sample(s, "color format %.16s", fmt);
     583           0 :                 return AVERROR_PATCHWELCOME;
     584             :             }
     585           0 :             break;
     586             : 
     587           0 :         case ID_DGBL:
     588           0 :             st->codecpar->codec_type         = AVMEDIA_TYPE_VIDEO;
     589           0 :             if (data_size < 8)
     590           0 :                 return AVERROR_INVALIDDATA;
     591           0 :             st->codecpar->width              = avio_rb16(pb);
     592           0 :             st->codecpar->height             = avio_rb16(pb);
     593           0 :             iff->bitmap_compression          = avio_rb16(pb);
     594           0 :             st->sample_aspect_ratio.num      = avio_r8(pb);
     595           0 :             st->sample_aspect_ratio.den      = avio_r8(pb);
     596           0 :             st->codecpar->bits_per_coded_sample = 24;
     597           0 :             break;
     598             : 
     599           0 :         case ID_DLOC:
     600           0 :             if (data_size < 4)
     601           0 :                 return AVERROR_INVALIDDATA;
     602           0 :             st->codecpar->width  = avio_rb16(pb);
     603           0 :             st->codecpar->height = avio_rb16(pb);
     604           0 :             break;
     605             : 
     606           0 :         case ID_TVDC:
     607           0 :             if (data_size < sizeof(iff->tvdc))
     608           0 :                 return AVERROR_INVALIDDATA;
     609           0 :             res = avio_read(pb, iff->tvdc, sizeof(iff->tvdc));
     610           0 :             if (res < 0)
     611           0 :                 return res;
     612           0 :             break;
     613             : 
     614           1 :         case ID_ANNO:
     615           1 :         case ID_TEXT:      metadata_tag = "comment";   break;
     616           0 :         case ID_AUTH:      metadata_tag = "artist";    break;
     617           0 :         case ID_COPYRIGHT: metadata_tag = "copyright"; break;
     618           1 :         case ID_NAME:      metadata_tag = "title";     break;
     619             : 
     620             :         /* DSD tags */
     621             : 
     622           0 :         case MKTAG('F','V','E','R'):
     623           0 :             if (data_size < 4)
     624           0 :                 return AVERROR_INVALIDDATA;
     625           0 :             version = avio_rb32(pb);
     626           0 :             av_log(s, AV_LOG_DEBUG, "DSIFF v%d.%d.%d.%d\n",version >> 24, (version >> 16) & 0xFF, (version >> 8) & 0xFF, version & 0xFF);
     627           0 :             st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
     628           0 :             break;
     629             : 
     630           0 :         case MKTAG('D','I','I','N'):
     631           0 :             res = parse_dsd_diin(s, st, orig_pos + data_size);
     632           0 :             if (res < 0)
     633           0 :                 return res;
     634           0 :             break;
     635             : 
     636           0 :         case MKTAG('P','R','O','P'):
     637           0 :             if (data_size < 4)
     638           0 :                 return AVERROR_INVALIDDATA;
     639           0 :             if (avio_rl32(pb) != MKTAG('S','N','D',' ')) {
     640           0 :                 avpriv_request_sample(s, "unknown property type");
     641           0 :                 break;
     642             :             }
     643           0 :             res = parse_dsd_prop(s, st, orig_pos + data_size);
     644           0 :             if (res < 0)
     645           0 :                 return res;
     646           0 :             break;
     647             : 
     648           0 :         case MKTAG('C','O','M','T'):
     649           0 :             if (data_size < 2)
     650           0 :                 return AVERROR_INVALIDDATA;
     651           0 :             nb_comments = avio_rb16(pb);
     652           0 :             for (i = 0; i < nb_comments; i++) {
     653             :                 int year, mon, day, hour, min, type, ref;
     654             :                 char tmp[24];
     655             :                 const char *tag;
     656             :                 int metadata_size;
     657             : 
     658           0 :                 year = avio_rb16(pb);
     659           0 :                 mon  = avio_r8(pb);
     660           0 :                 day  = avio_r8(pb);
     661           0 :                 hour = avio_r8(pb);
     662           0 :                 min  = avio_r8(pb);
     663           0 :                 snprintf(tmp, sizeof(tmp), "%04d-%02d-%02d %02d:%02d", year, mon, day, hour, min);
     664           0 :                 av_dict_set(&st->metadata, "comment_time", tmp, 0);
     665             : 
     666           0 :                 type = avio_rb16(pb);
     667           0 :                 ref  = avio_rb16(pb);
     668           0 :                 switch (type) {
     669           0 :                 case 1:
     670           0 :                     if (!i)
     671           0 :                         tag = "channel_comment";
     672             :                     else {
     673           0 :                         snprintf(tmp, sizeof(tmp), "channel%d_comment", ref);
     674           0 :                         tag = tmp;
     675             :                     }
     676           0 :                     break;
     677           0 :                 case 2:
     678           0 :                     tag = ref < FF_ARRAY_ELEMS(dsd_source_comment) ? dsd_source_comment[ref] : "source_comment";
     679           0 :                     break;
     680           0 :                 case 3:
     681           0 :                     tag = ref < FF_ARRAY_ELEMS(dsd_history_comment) ? dsd_history_comment[ref] : "file_history";
     682           0 :                     break;
     683           0 :                 default:
     684           0 :                     tag = "comment";
     685             :                 }
     686             : 
     687           0 :                 metadata_size  = avio_rb32(pb);
     688           0 :                 if ((res = get_metadata(s, tag, metadata_size)) < 0) {
     689           0 :                     av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", tag);
     690           0 :                     return res;
     691             :                 }
     692             : 
     693           0 :                 if (metadata_size & 1)
     694           0 :                     avio_skip(pb, 1);
     695             :             }
     696           0 :             break;
     697             :         }
     698             : 
     699          33 :         if (metadata_tag) {
     700           2 :             if ((res = get_metadata(s, metadata_tag, data_size)) < 0) {
     701           0 :                 av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag);
     702           0 :                 return res;
     703             :             }
     704             :         }
     705          33 :         avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1));
     706             :     }
     707             : 
     708           3 :     if (st->codecpar->codec_tag == ID_ANIM)
     709           0 :         avio_seek(pb, 12, SEEK_SET);
     710             :     else
     711           3 :         avio_seek(pb, iff->body_pos, SEEK_SET);
     712             : 
     713           3 :     switch(st->codecpar->codec_type) {
     714           1 :     case AVMEDIA_TYPE_AUDIO:
     715           1 :         avpriv_set_pts_info(st, 32, 1, st->codecpar->sample_rate);
     716             : 
     717           1 :         if (st->codecpar->codec_tag == ID_16SV)
     718           0 :             st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE_PLANAR;
     719           1 :         else if (st->codecpar->codec_tag == ID_MAUD) {
     720           0 :             if (iff->maud_bits == 8 && !iff->maud_compression) {
     721           0 :                 st->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
     722           0 :             } else if (iff->maud_bits == 16 && !iff->maud_compression) {
     723           0 :                 st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE;
     724           0 :             } else if (iff->maud_bits ==  8 && iff->maud_compression == 2) {
     725           0 :                 st->codecpar->codec_id = AV_CODEC_ID_PCM_ALAW;
     726           0 :             } else if (iff->maud_bits ==  8 && iff->maud_compression == 3) {
     727           0 :                 st->codecpar->codec_id = AV_CODEC_ID_PCM_MULAW;
     728             :             } else {
     729           0 :                 avpriv_request_sample(s, "compression %d and bit depth %d", iff->maud_compression, iff->maud_bits);
     730           0 :                 return AVERROR_PATCHWELCOME;
     731             :             }
     732           2 :         } else if (st->codecpar->codec_tag != ID_DSD &&
     733           1 :                    st->codecpar->codec_tag != ID_DST) {
     734           1 :             switch (iff->svx8_compression) {
     735           0 :             case COMP_NONE:
     736           0 :                 st->codecpar->codec_id = AV_CODEC_ID_PCM_S8_PLANAR;
     737           0 :                 break;
     738           1 :             case COMP_FIB:
     739           1 :                 st->codecpar->codec_id = AV_CODEC_ID_8SVX_FIB;
     740           1 :                 break;
     741           0 :             case COMP_EXP:
     742           0 :                 st->codecpar->codec_id = AV_CODEC_ID_8SVX_EXP;
     743           0 :                 break;
     744           0 :             default:
     745           0 :                 av_log(s, AV_LOG_ERROR,
     746           0 :                        "Unknown SVX8 compression method '%d'\n", iff->svx8_compression);
     747           0 :                 return -1;
     748             :             }
     749           0 :         }
     750             : 
     751           1 :         st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id);
     752           1 :         st->codecpar->bit_rate = (int64_t)st->codecpar->channels * st->codecpar->sample_rate * st->codecpar->bits_per_coded_sample;
     753           1 :         st->codecpar->block_align = st->codecpar->channels * st->codecpar->bits_per_coded_sample;
     754           1 :         if (st->codecpar->codec_tag == ID_DSD && st->codecpar->block_align <= 0)
     755           0 :             return AVERROR_INVALIDDATA;
     756           1 :         break;
     757             : 
     758           2 :     case AVMEDIA_TYPE_VIDEO:
     759           2 :         iff->bpp          = st->codecpar->bits_per_coded_sample;
     760           2 :         if (st->codecpar->codec_tag == ID_ANIM)
     761           0 :             avpriv_set_pts_info(st, 32, 1, 60);
     762           2 :         if ((screenmode & 0x800 /* Hold And Modify */) && iff->bpp <= 8) {
     763           0 :             iff->ham      = iff->bpp > 6 ? 6 : 4;
     764           0 :             st->codecpar->bits_per_coded_sample = 24;
     765             :         }
     766           2 :         iff->flags        = (screenmode & 0x80 /* Extra HalfBrite */) && iff->bpp <= 8;
     767           2 :         iff->masking      = masking;
     768           2 :         iff->transparency = transparency;
     769             : 
     770           2 :         if (!st->codecpar->extradata) {
     771           0 :             st->codecpar->extradata_size = IFF_EXTRA_VIDEO_SIZE;
     772           0 :             st->codecpar->extradata      = av_malloc(IFF_EXTRA_VIDEO_SIZE + AV_INPUT_BUFFER_PADDING_SIZE);
     773           0 :             if (!st->codecpar->extradata)
     774           0 :                 return AVERROR(ENOMEM);
     775             :         }
     776           2 :         av_assert0(st->codecpar->extradata_size >= IFF_EXTRA_VIDEO_SIZE);
     777           2 :         buf = st->codecpar->extradata;
     778           2 :         bytestream_put_be16(&buf, IFF_EXTRA_VIDEO_SIZE);
     779           2 :         bytestream_put_byte(&buf, iff->bitmap_compression);
     780           2 :         bytestream_put_byte(&buf, iff->bpp);
     781           2 :         bytestream_put_byte(&buf, iff->ham);
     782           2 :         bytestream_put_byte(&buf, iff->flags);
     783           2 :         bytestream_put_be16(&buf, iff->transparency);
     784           2 :         bytestream_put_byte(&buf, iff->masking);
     785           2 :         bytestream_put_buffer(&buf, iff->tvdc, sizeof(iff->tvdc));
     786           2 :         st->codecpar->codec_id = AV_CODEC_ID_IFF_ILBM;
     787           2 :         break;
     788           0 :     default:
     789           0 :         return -1;
     790             :     }
     791             : 
     792           3 :     return 0;
     793             : }
     794             : 
     795           0 : static unsigned get_anim_duration(uint8_t *buf, int size)
     796             : {
     797             :     GetByteContext gb;
     798             : 
     799           0 :     bytestream2_init(&gb, buf, size);
     800           0 :     bytestream2_skip(&gb, 4);
     801           0 :     while (bytestream2_get_bytes_left(&gb) > 8) {
     802           0 :         unsigned chunk = bytestream2_get_le32(&gb);
     803           0 :         unsigned size = bytestream2_get_be32(&gb);
     804             : 
     805           0 :         if (chunk == ID_ANHD) {
     806           0 :             if (size < 40)
     807           0 :                 break;
     808           0 :             bytestream2_skip(&gb, 14);
     809           0 :             return bytestream2_get_be32(&gb);
     810             :         } else {
     811           0 :             bytestream2_skip(&gb, size + size & 1);
     812             :         }
     813             :     }
     814           0 :     return 10;
     815             : }
     816             : 
     817           9 : static int iff_read_packet(AVFormatContext *s,
     818             :                            AVPacket *pkt)
     819             : {
     820           9 :     IffDemuxContext *iff = s->priv_data;
     821           9 :     AVIOContext *pb = s->pb;
     822           9 :     AVStream *st = s->streams[0];
     823             :     int ret;
     824           9 :     int64_t pos = avio_tell(pb);
     825             : 
     826           9 :     if (avio_feof(pb))
     827           0 :         return AVERROR_EOF;
     828           9 :     if (st->codecpar->codec_tag != ID_ANIM && pos >= iff->body_end)
     829           6 :         return AVERROR_EOF;
     830             : 
     831           3 :     if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
     832           1 :         if (st->codecpar->codec_tag == ID_DSD || st->codecpar->codec_tag == ID_MAUD) {
     833           0 :             ret = av_get_packet(pb, pkt, FFMIN(iff->body_end - pos, 1024 * st->codecpar->block_align));
     834           1 :         } else if (st->codecpar->codec_tag == ID_DST) {
     835           0 :             return read_dst_frame(s, pkt);
     836             :         } else {
     837           1 :             if (iff->body_size > INT_MAX)
     838           0 :                 return AVERROR_INVALIDDATA;
     839           1 :             ret = av_get_packet(pb, pkt, iff->body_size);
     840             :         }
     841           4 :     } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
     842           2 :                st->codecpar->codec_tag  == ID_ANIM) {
     843             :         uint64_t data_size, orig_pos;
     844             :         uint32_t chunk_id, chunk_id2;
     845             : 
     846           0 :         while (!avio_feof(pb)) {
     847           0 :             if (avio_feof(pb))
     848           0 :                 return AVERROR_EOF;
     849             : 
     850           0 :             orig_pos  = avio_tell(pb);
     851           0 :             chunk_id  = avio_rl32(pb);
     852           0 :             data_size = avio_rb32(pb);
     853           0 :             chunk_id2 = avio_rl32(pb);
     854             : 
     855           0 :             if (chunk_id  == ID_FORM &&
     856             :                 chunk_id2 == ID_ILBM) {
     857           0 :                 avio_skip(pb, -4);
     858           0 :                 break;
     859           0 :             } else if (chunk_id == ID_FORM &&
     860             :                        chunk_id2 == ID_ANIM) {
     861           0 :                 continue;
     862             :             } else {
     863           0 :                 avio_skip(pb, data_size);
     864             :             }
     865             :         }
     866           0 :         ret = av_get_packet(pb, pkt, data_size);
     867           0 :         pkt->pos = orig_pos;
     868           0 :         pkt->duration = get_anim_duration(pkt->data, pkt->size);
     869           0 :         if (pos == 12)
     870           0 :             pkt->flags |= AV_PKT_FLAG_KEY;
     871           4 :     } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
     872           2 :                st->codecpar->codec_tag  != ID_ANIM) {
     873           2 :         ret = av_get_packet(pb, pkt, iff->body_size);
     874           2 :         pkt->pos = pos;
     875           4 :         if (pos == iff->body_pos)
     876           2 :             pkt->flags |= AV_PKT_FLAG_KEY;
     877             :     } else {
     878           0 :         av_assert0(0);
     879             :     }
     880             : 
     881           3 :     if (ret < 0)
     882           0 :         return ret;
     883           3 :     pkt->stream_index = 0;
     884           3 :     return ret;
     885             : }
     886             : 
     887             : AVInputFormat ff_iff_demuxer = {
     888             :     .name           = "iff",
     889             :     .long_name      = NULL_IF_CONFIG_SMALL("IFF (Interchange File Format)"),
     890             :     .priv_data_size = sizeof(IffDemuxContext),
     891             :     .read_probe     = iff_probe,
     892             :     .read_header    = iff_read_header,
     893             :     .read_packet    = iff_read_packet,
     894             :     .flags          = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK,
     895             : };

Generated by: LCOV version 1.13