LCOV - code coverage report
Current view: top level - libavformat - psxstr.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 113 139 81.3 %
Date: 2017-12-14 19:11:59 Functions: 4 4 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Sony Playstation (PSX) STR File Demuxer
       3             :  * Copyright (c) 2003 The FFmpeg project
       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             : /**
      23             :  * @file
      24             :  * PSX STR file demuxer
      25             :  * by Mike Melanson (melanson@pcisys.net)
      26             :  * This module handles streams that have been ripped from Sony Playstation
      27             :  * CD games. This demuxer can handle either raw STR files (which are just
      28             :  * concatenations of raw compact disc sectors) or STR files with 0x2C-byte
      29             :  * RIFF headers, followed by CD sectors.
      30             :  */
      31             : 
      32             : #include "libavutil/channel_layout.h"
      33             : #include "libavutil/internal.h"
      34             : #include "libavutil/intreadwrite.h"
      35             : #include "avformat.h"
      36             : #include "internal.h"
      37             : 
      38             : #define RIFF_TAG MKTAG('R', 'I', 'F', 'F')
      39             : #define CDXA_TAG MKTAG('C', 'D', 'X', 'A')
      40             : 
      41             : #define RAW_CD_SECTOR_SIZE      2352
      42             : #define RAW_CD_SECTOR_DATA_SIZE 2304
      43             : #define VIDEO_DATA_CHUNK_SIZE   0x7E0
      44             : #define VIDEO_DATA_HEADER_SIZE  0x38
      45             : #define RIFF_HEADER_SIZE        0x2C
      46             : 
      47             : #define CDXA_TYPE_MASK     0x0E
      48             : #define CDXA_TYPE_DATA     0x08
      49             : #define CDXA_TYPE_AUDIO    0x04
      50             : #define CDXA_TYPE_VIDEO    0x02
      51             : 
      52             : #define STR_MAGIC (0x80010160)
      53             : 
      54             : typedef struct StrChannel {
      55             :     /* video parameters */
      56             :     int video_stream_index;
      57             :     AVPacket tmp_pkt;
      58             : 
      59             :     /* audio parameters */
      60             :     int audio_stream_index;
      61             : } StrChannel;
      62             : 
      63             : typedef struct StrDemuxContext {
      64             : 
      65             :     /* a STR file can contain up to 32 channels of data */
      66             :     StrChannel channels[32];
      67             : } StrDemuxContext;
      68             : 
      69             : static const uint8_t sync_header[12] = {0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00};
      70             : 
      71        6130 : static int str_probe(AVProbeData *p)
      72             : {
      73        6130 :     const uint8_t *sector= p->buf;
      74        6130 :     const uint8_t *end= sector + p->buf_size;
      75        6130 :     int aud=0, vid=0;
      76             : 
      77        6130 :     if (p->buf_size < RAW_CD_SECTOR_SIZE)
      78        3069 :         return 0;
      79             : 
      80        3067 :     if ((AV_RL32(&p->buf[0]) == RIFF_TAG) &&
      81           6 :         (AV_RL32(&p->buf[8]) == CDXA_TAG)) {
      82             : 
      83             :         /* RIFF header seen; skip 0x2C bytes */
      84           6 :         sector += RIFF_HEADER_SIZE;
      85             :     }
      86             : 
      87        6152 :     while (end - sector >= RAW_CD_SECTOR_SIZE) {
      88             :         /* look for CD sync header (00, 0xFF x 10, 00) */
      89        3082 :         if (memcmp(sector,sync_header,sizeof(sync_header)))
      90        3052 :             return 0;
      91             : 
      92          30 :         if (sector[0x11] >= 32)
      93           0 :             return 0;
      94             : 
      95          30 :         switch (sector[0x12] & CDXA_TYPE_MASK) {
      96          30 :         case CDXA_TYPE_DATA:
      97             :         case CDXA_TYPE_VIDEO: {
      98          30 :                 int current_sector = AV_RL16(&sector[0x1C]);
      99          30 :                 int sector_count   = AV_RL16(&sector[0x1E]);
     100          30 :                 int frame_size = AV_RL32(&sector[0x24]);
     101             : 
     102          60 :                 if(!(   frame_size>=0
     103          30 :                      && current_sector < sector_count
     104          30 :                      && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){
     105           0 :                     return 0;
     106             :                 }
     107          30 :                 vid++;
     108             : 
     109             :             }
     110          30 :             break;
     111           0 :         case CDXA_TYPE_AUDIO:
     112           0 :             if(sector[0x13]&0x2A)
     113           0 :                 return 0;
     114           0 :             aud++;
     115           0 :             break;
     116           0 :         default:
     117           0 :             if(sector[0x12] & CDXA_TYPE_MASK)
     118           0 :                 return 0;
     119             :         }
     120          30 :         sector += RAW_CD_SECTOR_SIZE;
     121             :     }
     122             :     /* MPEG files (like those ripped from VCDs) can also look like this;
     123             :      * only return half certainty */
     124           9 :     if(vid+aud > 3)  return AVPROBE_SCORE_EXTENSION;
     125           6 :     else if(vid+aud) return 1;
     126           0 :     else             return 0;
     127             : }
     128             : 
     129           3 : static int str_read_header(AVFormatContext *s)
     130             : {
     131           3 :     AVIOContext *pb = s->pb;
     132           3 :     StrDemuxContext *str = s->priv_data;
     133             :     unsigned char sector[RAW_CD_SECTOR_SIZE];
     134             :     int start;
     135             :     int i;
     136             : 
     137             :     /* skip over any RIFF header */
     138           3 :     if (avio_read(pb, sector, RIFF_HEADER_SIZE) != RIFF_HEADER_SIZE)
     139           0 :         return AVERROR(EIO);
     140           3 :     if (AV_RL32(&sector[0]) == RIFF_TAG)
     141           2 :         start = RIFF_HEADER_SIZE;
     142             :     else
     143           1 :         start = 0;
     144             : 
     145           3 :     avio_seek(pb, start, SEEK_SET);
     146             : 
     147          99 :     for(i=0; i<32; i++){
     148          96 :         str->channels[i].video_stream_index=
     149          96 :         str->channels[i].audio_stream_index= -1;
     150             :     }
     151             : 
     152           3 :     s->ctx_flags |= AVFMTCTX_NOHEADER;
     153             : 
     154           3 :     return 0;
     155             : }
     156             : 
     157         397 : static int str_read_packet(AVFormatContext *s,
     158             :                            AVPacket *ret_pkt)
     159             : {
     160         397 :     AVIOContext *pb = s->pb;
     161         397 :     StrDemuxContext *str = s->priv_data;
     162             :     unsigned char sector[RAW_CD_SECTOR_SIZE];
     163             :     int channel;
     164             :     AVPacket *pkt;
     165             :     AVStream *st;
     166             : 
     167             :     while (1) {
     168             : 
     169        2583 :         if (avio_read(pb, sector, RAW_CD_SECTOR_SIZE) != RAW_CD_SECTOR_SIZE)
     170           5 :             return AVERROR(EIO);
     171             : 
     172        1485 :         channel = sector[0x11];
     173        1485 :         if (channel >= 32)
     174           0 :             return AVERROR_INVALIDDATA;
     175             : 
     176        1485 :         switch (sector[0x12] & CDXA_TYPE_MASK) {
     177             : 
     178        1300 :         case CDXA_TYPE_DATA:
     179             :         case CDXA_TYPE_VIDEO:
     180             :             {
     181             : 
     182        1300 :                 int current_sector = AV_RL16(&sector[0x1C]);
     183        1300 :                 int sector_count   = AV_RL16(&sector[0x1E]);
     184        1300 :                 int frame_size = AV_RL32(&sector[0x24]);
     185             : 
     186        2600 :                 if(!(   frame_size>=0
     187        1300 :                      && current_sector < sector_count
     188        1300 :                      && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){
     189           0 :                     av_log(s, AV_LOG_ERROR, "Invalid parameters %d %d %d\n", current_sector, sector_count, frame_size);
     190           0 :                     break;
     191             :                 }
     192             : 
     193        1300 :                 if(str->channels[channel].video_stream_index < 0){
     194             :                     /* allocate a new AVStream */
     195           3 :                     st = avformat_new_stream(s, NULL);
     196           3 :                     if (!st)
     197           0 :                         return AVERROR(ENOMEM);
     198           3 :                     avpriv_set_pts_info(st, 64, 1, 15);
     199             : 
     200           3 :                     str->channels[channel].video_stream_index = st->index;
     201             : 
     202           3 :                     st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
     203           3 :                     st->codecpar->codec_id   = AV_CODEC_ID_MDEC;
     204           3 :                     st->codecpar->codec_tag  = 0;  /* no fourcc */
     205           3 :                     st->codecpar->width      = AV_RL16(&sector[0x28]);
     206           3 :                     st->codecpar->height     = AV_RL16(&sector[0x2A]);
     207             :                 }
     208             : 
     209             :                 /* if this is the first sector of the frame, allocate a pkt */
     210        1300 :                 pkt = &str->channels[channel].tmp_pkt;
     211             : 
     212        1300 :                 if(pkt->size != sector_count*VIDEO_DATA_CHUNK_SIZE){
     213         210 :                     if(pkt->data)
     214           0 :                         av_log(s, AV_LOG_ERROR, "mismatching sector_count\n");
     215         210 :                     av_packet_unref(pkt);
     216         210 :                     if (av_new_packet(pkt, sector_count*VIDEO_DATA_CHUNK_SIZE))
     217           0 :                         return AVERROR(EIO);
     218         210 :                     memset(pkt->data, 0, sector_count*VIDEO_DATA_CHUNK_SIZE);
     219             : 
     220         210 :                     pkt->pos= avio_tell(pb) - RAW_CD_SECTOR_SIZE;
     221         210 :                     pkt->stream_index =
     222         210 :                         str->channels[channel].video_stream_index;
     223             :                 }
     224             : 
     225        1300 :                 memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE,
     226             :                        sector + VIDEO_DATA_HEADER_SIZE,
     227             :                        VIDEO_DATA_CHUNK_SIZE);
     228             : 
     229        1300 :                 if (current_sector == sector_count-1) {
     230         207 :                     pkt->size= frame_size;
     231         207 :                     *ret_pkt = *pkt;
     232         207 :                     pkt->data= NULL;
     233         207 :                     pkt->size= -1;
     234         207 :                     pkt->buf = NULL;
     235         207 :                     return 0;
     236             :                 }
     237             : 
     238             :             }
     239        1093 :             break;
     240             : 
     241         185 :         case CDXA_TYPE_AUDIO:
     242         185 :             if(str->channels[channel].audio_stream_index < 0){
     243           3 :                 int fmt = sector[0x13];
     244             :                 /* allocate a new AVStream */
     245           3 :                 st = avformat_new_stream(s, NULL);
     246           3 :                 if (!st)
     247           0 :                     return AVERROR(ENOMEM);
     248             : 
     249           3 :                 str->channels[channel].audio_stream_index = st->index;
     250             : 
     251           3 :                 st->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
     252           3 :                 st->codecpar->codec_id    = AV_CODEC_ID_ADPCM_XA;
     253           3 :                 st->codecpar->codec_tag   = 0;  /* no fourcc */
     254           3 :                 if (fmt & 1) {
     255           3 :                     st->codecpar->channels       = 2;
     256           3 :                     st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
     257             :                 } else {
     258           0 :                     st->codecpar->channels       = 1;
     259           0 :                     st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
     260             :                 }
     261           3 :                 st->codecpar->sample_rate = (fmt&4)?18900:37800;
     262             :             //    st->codecpar->bit_rate = 0; //FIXME;
     263           3 :                 st->codecpar->block_align = 128;
     264             : 
     265           3 :                 avpriv_set_pts_info(st, 64, 18 * 224 / st->codecpar->channels,
     266           3 :                                     st->codecpar->sample_rate);
     267           3 :                 st->start_time = 0;
     268             :             }
     269         185 :             pkt = ret_pkt;
     270         185 :             if (av_new_packet(pkt, 2304))
     271           0 :                 return AVERROR(EIO);
     272         185 :             memcpy(pkt->data,sector+24,2304);
     273             : 
     274         185 :             pkt->stream_index =
     275         185 :                 str->channels[channel].audio_stream_index;
     276         185 :             pkt->duration = 1;
     277         185 :             return 0;
     278           0 :         default:
     279           0 :             av_log(s, AV_LOG_WARNING, "Unknown sector type %02X\n", sector[0x12]);
     280             :             /* drop the sector and move on */
     281           0 :             break;
     282             :         }
     283             : 
     284        1093 :         if (avio_feof(pb))
     285           0 :             return AVERROR(EIO);
     286             :     }
     287             : }
     288             : 
     289           3 : static int str_read_close(AVFormatContext *s)
     290             : {
     291           3 :     StrDemuxContext *str = s->priv_data;
     292             :     int i;
     293          99 :     for(i=0; i<32; i++){
     294          96 :         if(str->channels[i].tmp_pkt.data)
     295           3 :             av_packet_unref(&str->channels[i].tmp_pkt);
     296             :     }
     297             : 
     298           3 :     return 0;
     299             : }
     300             : 
     301             : AVInputFormat ff_str_demuxer = {
     302             :     .name           = "psxstr",
     303             :     .long_name      = NULL_IF_CONFIG_SMALL("Sony Playstation STR"),
     304             :     .priv_data_size = sizeof(StrDemuxContext),
     305             :     .read_probe     = str_probe,
     306             :     .read_header    = str_read_header,
     307             :     .read_packet    = str_read_packet,
     308             :     .read_close     = str_read_close,
     309             :     .flags          = AVFMT_NO_BYTE_SEEK,
     310             : };

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