LCOV - code coverage report
Current view: top level - src/libavformat - bink.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 109 150 72.7 %
Date: 2017-01-24 04:42:20 Functions: 3 4 75.0 %

          Line data    Source code
       1             : /*
       2             :  * Bink demuxer
       3             :  * Copyright (c) 2008-2010 Peter Ross (pross@xvid.org)
       4             :  * Copyright (c) 2009 Daniel Verkamp (daniel@drv.nu)
       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             :  * Bink demuxer
      26             :  *
      27             :  * Technical details here:
      28             :  *  http://wiki.multimedia.cx/index.php?title=Bink_Container
      29             :  */
      30             : 
      31             : #include <inttypes.h>
      32             : 
      33             : #include "libavutil/channel_layout.h"
      34             : #include "libavutil/intreadwrite.h"
      35             : #include "avformat.h"
      36             : #include "internal.h"
      37             : 
      38             : enum BinkAudFlags {
      39             :     BINK_AUD_16BITS = 0x4000, ///< prefer 16-bit output
      40             :     BINK_AUD_STEREO = 0x2000,
      41             :     BINK_AUD_USEDCT = 0x1000,
      42             : };
      43             : 
      44             : #define BINK_EXTRADATA_SIZE     1
      45             : #define BINK_MAX_AUDIO_TRACKS   256
      46             : #define BINK_MAX_WIDTH          7680
      47             : #define BINK_MAX_HEIGHT         4800
      48             : #define SMUSH_BLOCK_SIZE        512
      49             : 
      50             : typedef struct BinkDemuxContext {
      51             :     uint32_t file_size;
      52             : 
      53             :     uint32_t num_audio_tracks;
      54             :     int current_track;      ///< audio track to return in next packet
      55             :     int64_t video_pts;
      56             :     int64_t audio_pts[BINK_MAX_AUDIO_TRACKS];
      57             : 
      58             :     uint32_t remain_packet_size;
      59             :     int smush_size;
      60             : } BinkDemuxContext;
      61             : 
      62        5563 : static int probe(AVProbeData *p)
      63             : {
      64        5563 :     const uint8_t *b = p->buf;
      65        5563 :     int smush = AV_RN32(p->buf) == AV_RN32("SMUS");
      66             : 
      67             :     do {
      68        5569 :         if (((b[0] == 'B' && b[1] == 'I' && b[2] == 'K' &&
      69        5568 :              (b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i')) ||
      70        5557 :              (b[0] == 'K' && b[1] == 'B' && b[2] == '2' && /* Bink 2 */
      71           6 :              (b[3] == 'a' || b[3] == 'd' || b[3] == 'f' || b[3] == 'g'))) &&
      72          12 :             AV_RL32(b+8) > 0 &&  // num_frames
      73          18 :             AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH &&
      74          18 :             AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT &&
      75          12 :             AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0)  // fps num,den
      76           6 :             return AVPROBE_SCORE_MAX;
      77        5557 :         b += SMUSH_BLOCK_SIZE;
      78        5557 :     } while (smush && b < p->buf + p->buf_size - 32);
      79        5557 :     return 0;
      80             : }
      81             : 
      82           6 : static int read_header(AVFormatContext *s)
      83             : {
      84           6 :     BinkDemuxContext *bink = s->priv_data;
      85           6 :     AVIOContext *pb = s->pb;
      86             :     uint32_t fps_num, fps_den;
      87             :     AVStream *vst, *ast;
      88             :     unsigned int i;
      89             :     uint32_t pos, next_pos;
      90             :     uint16_t flags;
      91             :     int keyframe;
      92             :     int ret;
      93             : 
      94           6 :     vst = avformat_new_stream(s, NULL);
      95           6 :     if (!vst)
      96           0 :         return AVERROR(ENOMEM);
      97             : 
      98           6 :     vst->codecpar->codec_tag = avio_rl32(pb);
      99           6 :     if (vst->codecpar->codec_tag == AV_RL32("SMUS")) {
     100             :         do {
     101           0 :             bink->smush_size += SMUSH_BLOCK_SIZE;
     102           0 :             avio_skip(pb, SMUSH_BLOCK_SIZE - 4);
     103           0 :             vst->codecpar->codec_tag = avio_rl32(pb);
     104           0 :         } while (!avio_feof(pb) && (vst->codecpar->codec_tag & 0xFFFFFF) != AV_RL32("BIK"));
     105           0 :         if (avio_feof(pb)) {
     106           0 :             av_log(s, AV_LOG_ERROR, "invalid SMUSH header: BIK not found\n");
     107           0 :             return AVERROR_INVALIDDATA;
     108             :         }
     109             :     }
     110             : 
     111           6 :     bink->file_size = avio_rl32(pb) + 8;
     112           6 :     vst->duration   = avio_rl32(pb);
     113             : 
     114           6 :     if (vst->duration > 1000000) {
     115           0 :         av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n");
     116           0 :         return AVERROR(EIO);
     117             :     }
     118             : 
     119           6 :     if (avio_rl32(pb) > bink->file_size) {
     120           0 :         av_log(s, AV_LOG_ERROR,
     121             :                "invalid header: largest frame size greater than file size\n");
     122           0 :         return AVERROR(EIO);
     123             :     }
     124             : 
     125           6 :     avio_skip(pb, 4);
     126             : 
     127           6 :     vst->codecpar->width  = avio_rl32(pb);
     128           6 :     vst->codecpar->height = avio_rl32(pb);
     129             : 
     130           6 :     fps_num = avio_rl32(pb);
     131           6 :     fps_den = avio_rl32(pb);
     132           6 :     if (fps_num == 0 || fps_den == 0) {
     133           0 :         av_log(s, AV_LOG_ERROR,
     134             :                "invalid header: invalid fps (%"PRIu32"/%"PRIu32")\n",
     135             :                fps_num, fps_den);
     136           0 :         return AVERROR(EIO);
     137             :     }
     138           6 :     avpriv_set_pts_info(vst, 64, fps_den, fps_num);
     139           6 :     vst->avg_frame_rate = av_inv_q(vst->time_base);
     140             : 
     141           6 :     vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
     142           6 :     vst->codecpar->codec_id   = AV_CODEC_ID_BINKVIDEO;
     143             : 
     144           6 :     if ((vst->codecpar->codec_tag & 0xFFFFFF) == MKTAG('K', 'B', '2', 0)) {
     145           0 :         av_log(s, AV_LOG_WARNING, "Bink 2 video is not implemented\n");
     146           0 :         vst->codecpar->codec_id = AV_CODEC_ID_NONE;
     147             :     }
     148             : 
     149           6 :     if (ff_get_extradata(s, vst->codecpar, pb, 4) < 0)
     150           0 :         return AVERROR(ENOMEM);
     151             : 
     152           6 :     bink->num_audio_tracks = avio_rl32(pb);
     153             : 
     154           6 :     if (bink->num_audio_tracks > BINK_MAX_AUDIO_TRACKS) {
     155           0 :         av_log(s, AV_LOG_ERROR,
     156             :                "invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%"PRIu32")\n",
     157             :                bink->num_audio_tracks);
     158           0 :         return AVERROR(EIO);
     159             :     }
     160             : 
     161           6 :     if (bink->num_audio_tracks) {
     162           4 :         avio_skip(pb, 4 * bink->num_audio_tracks);
     163             : 
     164           8 :         for (i = 0; i < bink->num_audio_tracks; i++) {
     165           4 :             ast = avformat_new_stream(s, NULL);
     166           4 :             if (!ast)
     167           0 :                 return AVERROR(ENOMEM);
     168           4 :             ast->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
     169           4 :             ast->codecpar->codec_tag   = 0;
     170           4 :             ast->codecpar->sample_rate = avio_rl16(pb);
     171           4 :             avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate);
     172           4 :             flags = avio_rl16(pb);
     173           8 :             ast->codecpar->codec_id = flags & BINK_AUD_USEDCT ?
     174           4 :                                    AV_CODEC_ID_BINKAUDIO_DCT : AV_CODEC_ID_BINKAUDIO_RDFT;
     175           4 :             if (flags & BINK_AUD_STEREO) {
     176           3 :                 ast->codecpar->channels       = 2;
     177           3 :                 ast->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
     178             :             } else {
     179           1 :                 ast->codecpar->channels       = 1;
     180           1 :                 ast->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
     181             :             }
     182           4 :             if (ff_alloc_extradata(ast->codecpar, 4))
     183           0 :                 return AVERROR(ENOMEM);
     184           4 :             AV_WL32(ast->codecpar->extradata, vst->codecpar->codec_tag);
     185             :         }
     186             : 
     187           8 :         for (i = 0; i < bink->num_audio_tracks; i++)
     188           4 :             s->streams[i + 1]->id = avio_rl32(pb);
     189             :     }
     190             : 
     191             :     /* frame index table */
     192           6 :     next_pos = avio_rl32(pb);
     193         759 :     for (i = 0; i < vst->duration; i++) {
     194         753 :         pos = next_pos;
     195         753 :         if (i == vst->duration - 1) {
     196           6 :             next_pos = bink->file_size;
     197           6 :             keyframe = 0;
     198             :         } else {
     199         747 :             next_pos = avio_rl32(pb);
     200         747 :             keyframe = pos & 1;
     201             :         }
     202         753 :         pos &= ~1;
     203         753 :         next_pos &= ~1;
     204             : 
     205         753 :         if (next_pos <= pos) {
     206           0 :             av_log(s, AV_LOG_ERROR, "invalid frame index table\n");
     207           0 :             return AVERROR(EIO);
     208             :         }
     209         753 :         if ((ret = av_add_index_entry(vst, pos, i, next_pos - pos, 0,
     210             :                                       keyframe ? AVINDEX_KEYFRAME : 0)) < 0)
     211           0 :             return ret;
     212             :     }
     213             : 
     214           6 :     if (vst->index_entries)
     215           6 :         avio_seek(pb, vst->index_entries[0].pos + bink->smush_size, SEEK_SET);
     216             :     else
     217           0 :         avio_skip(pb, 4);
     218             : 
     219           6 :     bink->current_track = -1;
     220           6 :     return 0;
     221             : }
     222             : 
     223         288 : static int read_packet(AVFormatContext *s, AVPacket *pkt)
     224             : {
     225         288 :     BinkDemuxContext *bink = s->priv_data;
     226         288 :     AVIOContext *pb = s->pb;
     227             :     int ret;
     228             : 
     229         288 :     if (bink->current_track < 0) {
     230             :         int index_entry;
     231         187 :         AVStream *st = s->streams[0]; // stream 0 is video stream with index
     232             : 
     233         187 :         if (bink->video_pts >= st->duration)
     234           3 :             return AVERROR_EOF;
     235             : 
     236         184 :         index_entry = av_index_search_timestamp(st, bink->video_pts,
     237             :                                                 AVSEEK_FLAG_ANY);
     238         184 :         if (index_entry < 0) {
     239           0 :             av_log(s, AV_LOG_ERROR,
     240             :                    "could not find index entry for frame %"PRId64"\n",
     241             :                    bink->video_pts);
     242           0 :             return AVERROR(EIO);
     243             :         }
     244             : 
     245         184 :         bink->remain_packet_size = st->index_entries[index_entry].size;
     246         184 :         bink->current_track = 0;
     247             :     }
     248             : 
     249         604 :     while (bink->current_track < bink->num_audio_tracks) {
     250         134 :         uint32_t audio_size = avio_rl32(pb);
     251         134 :         if (audio_size > bink->remain_packet_size - 4) {
     252           0 :             av_log(s, AV_LOG_ERROR,
     253             :                    "frame %"PRId64": audio size in header (%"PRIu32") > size of packet left (%"PRIu32")\n",
     254             :                    bink->video_pts, audio_size, bink->remain_packet_size);
     255           0 :             return AVERROR(EIO);
     256             :         }
     257         134 :         bink->remain_packet_size -= 4 + audio_size;
     258         134 :         bink->current_track++;
     259         134 :         if (audio_size >= 4) {
     260             :             /* get one audio packet per track */
     261         100 :             if ((ret = av_get_packet(pb, pkt, audio_size)) < 0)
     262           0 :                 return ret;
     263         100 :             pkt->stream_index = bink->current_track;
     264         100 :             pkt->pts = bink->audio_pts[bink->current_track - 1];
     265             : 
     266             :             /* Each audio packet reports the number of decompressed samples
     267             :                (in bytes). We use this value to calculate the audio PTS */
     268         100 :             if (pkt->size >= 4)
     269         200 :                 bink->audio_pts[bink->current_track -1] +=
     270         100 :                     AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codecpar->channels);
     271         100 :             return 0;
     272             :         } else {
     273          34 :             avio_skip(pb, audio_size);
     274             :         }
     275             :     }
     276             : 
     277             :     /* get video packet */
     278         185 :     if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0)
     279           3 :         return ret;
     280         182 :     pkt->stream_index = 0;
     281         182 :     pkt->pts = bink->video_pts++;
     282         182 :     pkt->flags |= AV_PKT_FLAG_KEY;
     283             : 
     284             :     /* -1 instructs the next call to read_packet() to read the next frame */
     285         182 :     bink->current_track = -1;
     286             : 
     287         182 :     return 0;
     288             : }
     289             : 
     290           0 : static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
     291             : {
     292           0 :     BinkDemuxContext *bink = s->priv_data;
     293           0 :     AVStream *vst = s->streams[0];
     294             : 
     295           0 :     if (!s->pb->seekable)
     296           0 :         return -1;
     297             : 
     298             :     /* seek to the first frame */
     299           0 :     if (avio_seek(s->pb, vst->index_entries[0].pos + bink->smush_size, SEEK_SET) < 0)
     300           0 :         return -1;
     301             : 
     302           0 :     bink->video_pts = 0;
     303           0 :     memset(bink->audio_pts, 0, sizeof(bink->audio_pts));
     304           0 :     bink->current_track = -1;
     305           0 :     return 0;
     306             : }
     307             : 
     308             : AVInputFormat ff_bink_demuxer = {
     309             :     .name           = "bink",
     310             :     .long_name      = NULL_IF_CONFIG_SMALL("Bink"),
     311             :     .priv_data_size = sizeof(BinkDemuxContext),
     312             :     .read_probe     = probe,
     313             :     .read_header    = read_header,
     314             :     .read_packet    = read_packet,
     315             :     .read_seek      = read_seek,
     316             :     .flags          = AVFMT_SHOW_IDS,
     317             : };

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