LCOV - code coverage report
Current view: top level - libavformat - bink.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 114 157 72.6 %
Date: 2017-12-16 21:16:39 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        6130 : static int probe(AVProbeData *p)
      63             : {
      64        6130 :     const uint8_t *b = p->buf;
      65        6130 :     int smush = AV_RN32(p->buf) == AV_RN32("SMUS");
      66             : 
      67             :     do {
      68        6136 :         if (((b[0] == 'B' && b[1] == 'I' && b[2] == 'K' && /* Bink 1 */
      69          11 :              (b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i' ||
      70        6124 :               b[3] == 'k')) ||
      71        6124 :              (b[0] == 'K' && b[1] == 'B' && b[2] == '2' && /* Bink 2 */
      72           0 :              (b[3] == 'a' || b[3] == 'd' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' ||
      73           6 :               b[3] == 'i' || b[3] == 'j' || b[3] == 'k'))) &&
      74          12 :             AV_RL32(b+8) > 0 &&  // num_frames
      75          18 :             AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH &&
      76          18 :             AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT &&
      77          12 :             AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0)  // fps num,den
      78           6 :             return AVPROBE_SCORE_MAX;
      79        6124 :         b += SMUSH_BLOCK_SIZE;
      80        6124 :     } while (smush && b < p->buf + p->buf_size - 32);
      81        6124 :     return 0;
      82             : }
      83             : 
      84           6 : static int read_header(AVFormatContext *s)
      85             : {
      86           6 :     BinkDemuxContext *bink = s->priv_data;
      87           6 :     AVIOContext *pb = s->pb;
      88             :     uint32_t fps_num, fps_den;
      89             :     AVStream *vst, *ast;
      90             :     unsigned int i;
      91             :     uint32_t pos, next_pos;
      92             :     uint16_t flags;
      93             :     int keyframe;
      94             :     int ret;
      95             : 
      96           6 :     vst = avformat_new_stream(s, NULL);
      97           6 :     if (!vst)
      98           0 :         return AVERROR(ENOMEM);
      99             : 
     100           6 :     vst->codecpar->codec_tag = avio_rl32(pb);
     101           6 :     if (vst->codecpar->codec_tag == AV_RL32("SMUS")) {
     102             :         do {
     103           0 :             bink->smush_size += SMUSH_BLOCK_SIZE;
     104           0 :             avio_skip(pb, SMUSH_BLOCK_SIZE - 4);
     105           0 :             vst->codecpar->codec_tag = avio_rl32(pb);
     106           0 :         } while (!avio_feof(pb) && (vst->codecpar->codec_tag & 0xFFFFFF) != AV_RL32("BIK"));
     107           0 :         if (avio_feof(pb)) {
     108           0 :             av_log(s, AV_LOG_ERROR, "invalid SMUSH header: BIK not found\n");
     109           0 :             return AVERROR_INVALIDDATA;
     110             :         }
     111             :     }
     112             : 
     113           6 :     bink->file_size = avio_rl32(pb) + 8;
     114           6 :     vst->duration   = avio_rl32(pb);
     115             : 
     116           6 :     if (vst->duration > 1000000) {
     117           0 :         av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n");
     118           0 :         return AVERROR(EIO);
     119             :     }
     120             : 
     121           6 :     if (avio_rl32(pb) > bink->file_size) {
     122           0 :         av_log(s, AV_LOG_ERROR,
     123             :                "invalid header: largest frame size greater than file size\n");
     124           0 :         return AVERROR(EIO);
     125             :     }
     126             : 
     127           6 :     avio_skip(pb, 4);
     128             : 
     129           6 :     vst->codecpar->width  = avio_rl32(pb);
     130           6 :     vst->codecpar->height = avio_rl32(pb);
     131             : 
     132           6 :     fps_num = avio_rl32(pb);
     133           6 :     fps_den = avio_rl32(pb);
     134           6 :     if (fps_num == 0 || fps_den == 0) {
     135           0 :         av_log(s, AV_LOG_ERROR,
     136             :                "invalid header: invalid fps (%"PRIu32"/%"PRIu32")\n",
     137             :                fps_num, fps_den);
     138           0 :         return AVERROR(EIO);
     139             :     }
     140           6 :     avpriv_set_pts_info(vst, 64, fps_den, fps_num);
     141           6 :     vst->avg_frame_rate = av_inv_q(vst->time_base);
     142             : 
     143           6 :     vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
     144           6 :     vst->codecpar->codec_id   = AV_CODEC_ID_BINKVIDEO;
     145             : 
     146           6 :     if ((vst->codecpar->codec_tag & 0xFFFFFF) == MKTAG('K', 'B', '2', 0)) {
     147           0 :         av_log(s, AV_LOG_WARNING, "Bink 2 video is not implemented\n");
     148           0 :         vst->codecpar->codec_id = AV_CODEC_ID_NONE;
     149             :     }
     150             : 
     151           6 :     if (ff_get_extradata(s, vst->codecpar, pb, 4) < 0)
     152           0 :         return AVERROR(ENOMEM);
     153             : 
     154           6 :     bink->num_audio_tracks = avio_rl32(pb);
     155             : 
     156           6 :     if (bink->num_audio_tracks > BINK_MAX_AUDIO_TRACKS) {
     157           0 :         av_log(s, AV_LOG_ERROR,
     158             :                "invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%"PRIu32")\n",
     159             :                bink->num_audio_tracks);
     160           0 :         return AVERROR(EIO);
     161             :     }
     162             : 
     163           6 :     if (bink->num_audio_tracks) {
     164           4 :         uint32_t signature = (vst->codecpar->codec_tag & 0xFFFFFF);
     165           4 :         uint8_t revision = ((vst->codecpar->codec_tag >> 24) % 0xFF);
     166             : 
     167           8 :         if ((signature == AV_RL32("BIK") && (revision == 0x6b)) || /* k */
     168           4 :             (signature == AV_RL32("KB2") && (revision == 0x69 || revision == 0x6a || revision == 0x6b))) /* i,j,k */
     169           0 :             avio_skip(pb, 4); /* unknown new field */
     170             : 
     171           4 :         avio_skip(pb, 4 * bink->num_audio_tracks); /* max decoded size */
     172             : 
     173           8 :         for (i = 0; i < bink->num_audio_tracks; i++) {
     174           4 :             ast = avformat_new_stream(s, NULL);
     175           4 :             if (!ast)
     176           0 :                 return AVERROR(ENOMEM);
     177           4 :             ast->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
     178           4 :             ast->codecpar->codec_tag   = 0;
     179           4 :             ast->codecpar->sample_rate = avio_rl16(pb);
     180           4 :             avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate);
     181           4 :             flags = avio_rl16(pb);
     182           8 :             ast->codecpar->codec_id = flags & BINK_AUD_USEDCT ?
     183           4 :                                    AV_CODEC_ID_BINKAUDIO_DCT : AV_CODEC_ID_BINKAUDIO_RDFT;
     184           4 :             if (flags & BINK_AUD_STEREO) {
     185           3 :                 ast->codecpar->channels       = 2;
     186           3 :                 ast->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
     187             :             } else {
     188           1 :                 ast->codecpar->channels       = 1;
     189           1 :                 ast->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
     190             :             }
     191           4 :             if (ff_alloc_extradata(ast->codecpar, 4))
     192           0 :                 return AVERROR(ENOMEM);
     193           4 :             AV_WL32(ast->codecpar->extradata, vst->codecpar->codec_tag);
     194             :         }
     195             : 
     196           8 :         for (i = 0; i < bink->num_audio_tracks; i++)
     197           4 :             s->streams[i + 1]->id = avio_rl32(pb);
     198             :     }
     199             : 
     200             :     /* frame index table */
     201           6 :     next_pos = avio_rl32(pb);
     202         759 :     for (i = 0; i < vst->duration; i++) {
     203         753 :         pos = next_pos;
     204         753 :         if (i == vst->duration - 1) {
     205           6 :             next_pos = bink->file_size;
     206           6 :             keyframe = 0;
     207             :         } else {
     208         747 :             next_pos = avio_rl32(pb);
     209         747 :             keyframe = pos & 1;
     210             :         }
     211         753 :         pos &= ~1;
     212         753 :         next_pos &= ~1;
     213             : 
     214         753 :         if (next_pos <= pos) {
     215           0 :             av_log(s, AV_LOG_ERROR, "invalid frame index table\n");
     216           0 :             return AVERROR(EIO);
     217             :         }
     218         753 :         if ((ret = av_add_index_entry(vst, pos, i, next_pos - pos, 0,
     219             :                                       keyframe ? AVINDEX_KEYFRAME : 0)) < 0)
     220           0 :             return ret;
     221             :     }
     222             : 
     223           6 :     if (vst->index_entries)
     224           6 :         avio_seek(pb, vst->index_entries[0].pos + bink->smush_size, SEEK_SET);
     225             :     else
     226           0 :         avio_skip(pb, 4);
     227             : 
     228           6 :     bink->current_track = -1;
     229           6 :     return 0;
     230             : }
     231             : 
     232         287 : static int read_packet(AVFormatContext *s, AVPacket *pkt)
     233             : {
     234         287 :     BinkDemuxContext *bink = s->priv_data;
     235         287 :     AVIOContext *pb = s->pb;
     236             :     int ret;
     237             : 
     238         287 :     if (bink->current_track < 0) {
     239             :         int index_entry;
     240         187 :         AVStream *st = s->streams[0]; // stream 0 is video stream with index
     241             : 
     242         187 :         if (bink->video_pts >= st->duration)
     243           3 :             return AVERROR_EOF;
     244             : 
     245         184 :         index_entry = av_index_search_timestamp(st, bink->video_pts,
     246             :                                                 AVSEEK_FLAG_ANY);
     247         184 :         if (index_entry < 0) {
     248           0 :             av_log(s, AV_LOG_ERROR,
     249             :                    "could not find index entry for frame %"PRId64"\n",
     250             :                    bink->video_pts);
     251           0 :             return AVERROR(EIO);
     252             :         }
     253             : 
     254         184 :         bink->remain_packet_size = st->index_entries[index_entry].size;
     255         184 :         bink->current_track = 0;
     256             :     }
     257             : 
     258         602 :     while (bink->current_track < bink->num_audio_tracks) {
     259         134 :         uint32_t audio_size = avio_rl32(pb);
     260         134 :         if (audio_size > bink->remain_packet_size - 4) {
     261           0 :             av_log(s, AV_LOG_ERROR,
     262             :                    "frame %"PRId64": audio size in header (%"PRIu32") > size of packet left (%"PRIu32")\n",
     263             :                    bink->video_pts, audio_size, bink->remain_packet_size);
     264           0 :             return AVERROR(EIO);
     265             :         }
     266         134 :         bink->remain_packet_size -= 4 + audio_size;
     267         134 :         bink->current_track++;
     268         134 :         if (audio_size >= 4) {
     269             :             /* get one audio packet per track */
     270         100 :             if ((ret = av_get_packet(pb, pkt, audio_size)) < 0)
     271           0 :                 return ret;
     272         100 :             pkt->stream_index = bink->current_track;
     273         100 :             pkt->pts = bink->audio_pts[bink->current_track - 1];
     274             : 
     275             :             /* Each audio packet reports the number of decompressed samples
     276             :                (in bytes). We use this value to calculate the audio PTS */
     277         100 :             if (pkt->size >= 4)
     278         200 :                 bink->audio_pts[bink->current_track -1] +=
     279         100 :                     AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codecpar->channels);
     280         100 :             return 0;
     281             :         } else {
     282          34 :             avio_skip(pb, audio_size);
     283             :         }
     284             :     }
     285             : 
     286             :     /* get video packet */
     287         184 :     if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0)
     288           2 :         return ret;
     289         182 :     pkt->stream_index = 0;
     290         182 :     pkt->pts = bink->video_pts++;
     291         182 :     pkt->flags |= AV_PKT_FLAG_KEY;
     292             : 
     293             :     /* -1 instructs the next call to read_packet() to read the next frame */
     294         182 :     bink->current_track = -1;
     295             : 
     296         182 :     return 0;
     297             : }
     298             : 
     299           0 : static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
     300             : {
     301           0 :     BinkDemuxContext *bink = s->priv_data;
     302           0 :     AVStream *vst = s->streams[0];
     303             : 
     304           0 :     if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
     305           0 :         return -1;
     306             : 
     307             :     /* seek to the first frame */
     308           0 :     if (avio_seek(s->pb, vst->index_entries[0].pos + bink->smush_size, SEEK_SET) < 0)
     309           0 :         return -1;
     310             : 
     311           0 :     bink->video_pts = 0;
     312           0 :     memset(bink->audio_pts, 0, sizeof(bink->audio_pts));
     313           0 :     bink->current_track = -1;
     314           0 :     return 0;
     315             : }
     316             : 
     317             : AVInputFormat ff_bink_demuxer = {
     318             :     .name           = "bink",
     319             :     .long_name      = NULL_IF_CONFIG_SMALL("Bink"),
     320             :     .priv_data_size = sizeof(BinkDemuxContext),
     321             :     .read_probe     = probe,
     322             :     .read_header    = read_header,
     323             :     .read_packet    = read_packet,
     324             :     .read_seek      = read_seek,
     325             :     .flags          = AVFMT_SHOW_IDS,
     326             : };

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