LCOV - code coverage report
Current view: top level - libavformat - siff.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 93 135 68.9 %
Date: 2017-12-14 19:11:59 Functions: 5 6 83.3 %

          Line data    Source code
       1             : /*
       2             :  * Beam Software SIFF demuxer
       3             :  * Copyright (c) 2007 Konstantin Shishkov
       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/channel_layout.h"
      23             : #include "libavutil/intreadwrite.h"
      24             : 
      25             : #include "avformat.h"
      26             : #include "internal.h"
      27             : #include "avio_internal.h"
      28             : 
      29             : enum SIFFTags {
      30             :     TAG_SIFF = MKTAG('S', 'I', 'F', 'F'),
      31             :     TAG_BODY = MKTAG('B', 'O', 'D', 'Y'),
      32             :     TAG_VBHD = MKTAG('V', 'B', 'H', 'D'),
      33             :     TAG_SHDR = MKTAG('S', 'H', 'D', 'R'),
      34             :     TAG_VBV1 = MKTAG('V', 'B', 'V', '1'),
      35             :     TAG_SOUN = MKTAG('S', 'O', 'U', 'N'),
      36             : };
      37             : 
      38             : enum VBFlags {
      39             :     VB_HAS_GMC     = 0x01,
      40             :     VB_HAS_AUDIO   = 0x04,
      41             :     VB_HAS_VIDEO   = 0x08,
      42             :     VB_HAS_PALETTE = 0x10,
      43             :     VB_HAS_LENGTH  = 0x20
      44             : };
      45             : 
      46             : typedef struct SIFFContext {
      47             :     int frames;
      48             :     int cur_frame;
      49             :     int rate;
      50             :     int bits;
      51             :     int block_align;
      52             : 
      53             :     int has_video;
      54             :     int has_audio;
      55             : 
      56             :     int curstrm;
      57             :     unsigned int pktsize;
      58             :     int gmcsize;
      59             :     unsigned int sndsize;
      60             : 
      61             :     unsigned int flags;
      62             :     uint8_t gmc[4];
      63             : } SIFFContext;
      64             : 
      65        6130 : static int siff_probe(AVProbeData *p)
      66             : {
      67        6130 :     uint32_t tag = AV_RL32(p->buf + 8);
      68             :     /* check file header */
      69        6130 :     if (AV_RL32(p->buf) != TAG_SIFF ||
      70           0 :         (tag != TAG_VBV1 && tag != TAG_SOUN))
      71        6128 :         return 0;
      72           2 :     return AVPROBE_SCORE_MAX;
      73             : }
      74             : 
      75           2 : static int create_audio_stream(AVFormatContext *s, SIFFContext *c)
      76             : {
      77             :     AVStream *ast;
      78           2 :     ast = avformat_new_stream(s, NULL);
      79           2 :     if (!ast)
      80           0 :         return AVERROR(ENOMEM);
      81           2 :     ast->codecpar->codec_type            = AVMEDIA_TYPE_AUDIO;
      82           2 :     ast->codecpar->codec_id              = AV_CODEC_ID_PCM_U8;
      83           2 :     ast->codecpar->channels              = 1;
      84           2 :     ast->codecpar->channel_layout        = AV_CH_LAYOUT_MONO;
      85           2 :     ast->codecpar->bits_per_coded_sample = 8;
      86           2 :     ast->codecpar->sample_rate           = c->rate;
      87           2 :     avpriv_set_pts_info(ast, 16, 1, c->rate);
      88           2 :     ast->start_time                   = 0;
      89           2 :     return 0;
      90             : }
      91             : 
      92           2 : static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
      93             : {
      94             :     AVStream *st;
      95             :     int width, height;
      96             : 
      97           2 :     if (avio_rl32(pb) != TAG_VBHD) {
      98           0 :         av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
      99           0 :         return AVERROR_INVALIDDATA;
     100             :     }
     101           2 :     if (avio_rb32(pb) != 32) {
     102           0 :         av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
     103           0 :         return AVERROR_INVALIDDATA;
     104             :     }
     105           2 :     if (avio_rl16(pb) != 1) {
     106           0 :         av_log(s, AV_LOG_ERROR, "Incorrect header version\n");
     107           0 :         return AVERROR_INVALIDDATA;
     108             :     }
     109           2 :     width  = avio_rl16(pb);
     110           2 :     height = avio_rl16(pb);
     111           2 :     avio_skip(pb, 4);
     112           2 :     c->frames = avio_rl16(pb);
     113           2 :     if (!c->frames) {
     114           0 :         av_log(s, AV_LOG_ERROR, "File contains no frames ???\n");
     115           0 :         return AVERROR_INVALIDDATA;
     116             :     }
     117           2 :     c->bits        = avio_rl16(pb);
     118           2 :     c->rate        = avio_rl16(pb);
     119           2 :     c->block_align = c->rate * (c->bits >> 3);
     120             : 
     121           2 :     avio_skip(pb, 16); // zeroes
     122             : 
     123           2 :     st = avformat_new_stream(s, NULL);
     124           2 :     if (!st)
     125           0 :         return AVERROR(ENOMEM);
     126           2 :     st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
     127           2 :     st->codecpar->codec_id   = AV_CODEC_ID_VB;
     128           2 :     st->codecpar->codec_tag  = MKTAG('V', 'B', 'V', '1');
     129           2 :     st->codecpar->width      = width;
     130           2 :     st->codecpar->height     = height;
     131           2 :     st->codecpar->format     = AV_PIX_FMT_PAL8;
     132           2 :     st->nb_frames            =
     133           2 :     st->duration             = c->frames;
     134           2 :     avpriv_set_pts_info(st, 16, 1, 12);
     135             : 
     136           2 :     c->cur_frame = 0;
     137           2 :     c->has_video = 1;
     138           2 :     c->has_audio = !!c->rate;
     139           2 :     c->curstrm   = -1;
     140           2 :     if (c->has_audio)
     141           2 :         return create_audio_stream(s, c);
     142           0 :     return 0;
     143             : }
     144             : 
     145           0 : static int siff_parse_soun(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
     146             : {
     147           0 :     if (avio_rl32(pb) != TAG_SHDR) {
     148           0 :         av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
     149           0 :         return AVERROR_INVALIDDATA;
     150             :     }
     151           0 :     if (avio_rb32(pb) != 8) {
     152           0 :         av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
     153           0 :         return AVERROR_INVALIDDATA;
     154             :     }
     155           0 :     avio_skip(pb, 4); // unknown value
     156           0 :     c->rate        = avio_rl16(pb);
     157           0 :     c->bits        = avio_rl16(pb);
     158           0 :     c->block_align = c->rate * (c->bits >> 3);
     159           0 :     return create_audio_stream(s, c);
     160             : }
     161             : 
     162           2 : static int siff_read_header(AVFormatContext *s)
     163             : {
     164           2 :     AVIOContext *pb = s->pb;
     165           2 :     SIFFContext *c  = s->priv_data;
     166             :     uint32_t tag;
     167             :     int ret;
     168             : 
     169           2 :     if (avio_rl32(pb) != TAG_SIFF)
     170           0 :         return AVERROR_INVALIDDATA;
     171           2 :     avio_skip(pb, 4); // ignore size
     172           2 :     tag = avio_rl32(pb);
     173             : 
     174           2 :     if (tag != TAG_VBV1 && tag != TAG_SOUN) {
     175           0 :         av_log(s, AV_LOG_ERROR, "Not a VBV file\n");
     176           0 :         return AVERROR_INVALIDDATA;
     177             :     }
     178             : 
     179           2 :     if (tag == TAG_VBV1 && (ret = siff_parse_vbv1(s, c, pb)) < 0)
     180           0 :         return ret;
     181           2 :     if (tag == TAG_SOUN && (ret = siff_parse_soun(s, c, pb)) < 0)
     182           0 :         return ret;
     183           2 :     if (avio_rl32(pb) != MKTAG('B', 'O', 'D', 'Y')) {
     184           0 :         av_log(s, AV_LOG_ERROR, "'BODY' chunk is missing\n");
     185           0 :         return AVERROR_INVALIDDATA;
     186             :     }
     187           2 :     avio_skip(pb, 4); // ignore size
     188             : 
     189           2 :     return 0;
     190             : }
     191             : 
     192         181 : static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
     193             : {
     194         181 :     SIFFContext *c = s->priv_data;
     195             : 
     196         181 :     if (c->has_video) {
     197             :         unsigned int size;
     198         181 :         if (c->cur_frame >= c->frames)
     199           1 :             return AVERROR_EOF;
     200         180 :         if (c->curstrm == -1) {
     201         163 :             c->pktsize = avio_rl32(s->pb) - 4;
     202         163 :             c->flags   = avio_rl16(s->pb);
     203         163 :             c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
     204         163 :             if (c->gmcsize)
     205          20 :                 avio_read(s->pb, c->gmc, c->gmcsize);
     206         163 :             c->sndsize = (c->flags & VB_HAS_AUDIO) ? avio_rl32(s->pb) : 0;
     207         163 :             c->curstrm = !!(c->flags & VB_HAS_AUDIO);
     208             :         }
     209             : 
     210         180 :         if (!c->curstrm) {
     211         163 :             if (c->pktsize < 2LL + c->sndsize + c->gmcsize)
     212           0 :                 return AVERROR_INVALIDDATA;
     213             : 
     214         163 :             size = c->pktsize - c->sndsize - c->gmcsize - 2;
     215         163 :             size = ffio_limit(s->pb, size);
     216         163 :             if (av_new_packet(pkt, size + c->gmcsize + 2) < 0)
     217           0 :                 return AVERROR(ENOMEM);
     218         163 :             AV_WL16(pkt->data, c->flags);
     219         163 :             if (c->gmcsize)
     220          20 :                 memcpy(pkt->data + 2, c->gmc, c->gmcsize);
     221         163 :             if (avio_read(s->pb, pkt->data + 2 + c->gmcsize, size) != size) {
     222           0 :                 av_packet_unref(pkt);
     223           0 :                 return AVERROR_INVALIDDATA;
     224             :             }
     225         163 :             pkt->stream_index = 0;
     226         163 :             c->curstrm        = -1;
     227             :         } else {
     228          17 :             int pktsize = av_get_packet(s->pb, pkt, c->sndsize - 4);
     229          17 :             if (pktsize < 0)
     230           0 :                 return AVERROR(EIO);
     231          17 :             pkt->stream_index = 1;
     232          17 :             pkt->duration     = pktsize;
     233          17 :             c->curstrm        = 0;
     234             :         }
     235         180 :         if (!c->cur_frame || c->curstrm)
     236         165 :             pkt->flags |= AV_PKT_FLAG_KEY;
     237         180 :         if (c->curstrm == -1)
     238         163 :             c->cur_frame++;
     239             :     } else {
     240           0 :         int pktsize = av_get_packet(s->pb, pkt, c->block_align);
     241           0 :         if (!pktsize)
     242           0 :             return AVERROR_EOF;
     243           0 :         if (pktsize <= 0)
     244           0 :             return AVERROR(EIO);
     245           0 :         pkt->duration = pktsize;
     246             :     }
     247         180 :     return pkt->size;
     248             : }
     249             : 
     250             : AVInputFormat ff_siff_demuxer = {
     251             :     .name           = "siff",
     252             :     .long_name      = NULL_IF_CONFIG_SMALL("Beam Software SIFF"),
     253             :     .priv_data_size = sizeof(SIFFContext),
     254             :     .read_probe     = siff_probe,
     255             :     .read_header    = siff_read_header,
     256             :     .read_packet    = siff_read_packet,
     257             :     .extensions     = "vb,son",
     258             : };

Generated by: LCOV version 1.13