/* * Sony Playstation (PSX) STR File Demuxer * Copyright (c) 2003 The FFmpeg project * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * PSX STR file demuxer * by Mike Melanson (melanson@pcisys.net) * This module handles streams that have been ripped from Sony Playstation * CD games. This demuxer can handle either raw STR files (which are just * concatenations of raw compact disc sectors) or STR files with 0x2C-byte * RIFF headers, followed by CD sectors. */ #include "libavutil/channel_layout.h" #include "libavutil/internal.h" #include "libavutil/intreadwrite.h" #include "avformat.h" #include "internal.h" #define RIFF_TAG MKTAG('R', 'I', 'F', 'F') #define CDXA_TAG MKTAG('C', 'D', 'X', 'A') #define RAW_CD_SECTOR_SIZE 2352 #define RAW_CD_SECTOR_DATA_SIZE 2304 #define VIDEO_DATA_CHUNK_SIZE 0x7E0 #define VIDEO_DATA_HEADER_SIZE 0x38 #define RIFF_HEADER_SIZE 0x2C #define CDXA_TYPE_MASK 0x0E #define CDXA_TYPE_DATA 0x08 #define CDXA_TYPE_AUDIO 0x04 #define CDXA_TYPE_VIDEO 0x02 #define CDXA_TYPE_EMPTY 0x00 #define STR_MAGIC (0x80010160) typedef struct StrChannel { /* video parameters */ int video_stream_index; AVPacket tmp_pkt; /* audio parameters */ int audio_stream_index; } StrChannel; typedef struct StrDemuxContext { /* a STR file can contain up to 32 channels of data */ StrChannel channels[32]; } StrDemuxContext; static const uint8_t sync_header[12] = {0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00}; static int str_probe(const AVProbeData *p) { const uint8_t *sector= p->buf; const uint8_t *end= sector + p->buf_size; int aud=0, vid=0; if (p->buf_size < RAW_CD_SECTOR_SIZE) return 0; if ((AV_RL32(&p->buf[0]) == RIFF_TAG) && (AV_RL32(&p->buf[8]) == CDXA_TAG)) { /* RIFF header seen; skip 0x2C bytes */ sector += RIFF_HEADER_SIZE; } while (end - sector >= RAW_CD_SECTOR_SIZE) { /* look for CD sync header (00, 0xFF x 10, 00) */ if (memcmp(sector,sync_header,sizeof(sync_header))) return 0; if (sector[0x11] >= 32) return 0; switch (sector[0x12] & CDXA_TYPE_MASK) { case CDXA_TYPE_DATA: case CDXA_TYPE_VIDEO: { int current_sector = AV_RL16(§or[0x1C]); int sector_count = AV_RL16(§or[0x1E]); int frame_size = AV_RL32(§or[0x24]); if(!( frame_size>=0 && current_sector < sector_count && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){ return 0; } vid++; } break; case CDXA_TYPE_AUDIO: if(sector[0x13]&0x2A) return 0; aud++; break; default: if(sector[0x12] & CDXA_TYPE_MASK) return 0; } sector += RAW_CD_SECTOR_SIZE; } /* MPEG files (like those ripped from VCDs) can also look like this; * only return half certainty */ if(vid+aud > 3) return AVPROBE_SCORE_EXTENSION; else if(vid+aud) return 1; else return 0; } static int str_read_header(AVFormatContext *s) { AVIOContext *pb = s->pb; StrDemuxContext *str = s->priv_data; unsigned char sector[RAW_CD_SECTOR_SIZE]; int start; int i; /* skip over any RIFF header */ if (avio_read(pb, sector, RIFF_HEADER_SIZE) != RIFF_HEADER_SIZE) return AVERROR(EIO); if (AV_RL32(§or[0]) == RIFF_TAG) start = RIFF_HEADER_SIZE; else start = 0; avio_seek(pb, start, SEEK_SET); for(i=0; i<32; i++){ str->channels[i].video_stream_index= str->channels[i].audio_stream_index= -1; } s->ctx_flags |= AVFMTCTX_NOHEADER; return 0; } static int str_read_packet(AVFormatContext *s, AVPacket *ret_pkt) { AVIOContext *pb = s->pb; StrDemuxContext *str = s->priv_data; unsigned char sector[RAW_CD_SECTOR_SIZE]; int channel, ret; AVPacket *pkt; AVStream *st; while (1) { int read = avio_read(pb, sector, RAW_CD_SECTOR_SIZE); if (read == AVERROR_EOF) return AVERROR_EOF; if (read != RAW_CD_SECTOR_SIZE) return AVERROR(EIO); channel = sector[0x11]; if (channel >= 32) return AVERROR_INVALIDDATA; switch (sector[0x12] & CDXA_TYPE_MASK) { case CDXA_TYPE_DATA: case CDXA_TYPE_VIDEO: { int current_sector = AV_RL16(§or[0x1C]); int sector_count = AV_RL16(§or[0x1E]); int frame_size = AV_RL32(§or[0x24]); if(!( frame_size>=0 && current_sector < sector_count && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){ av_log(s, AV_LOG_ERROR, "Invalid parameters %d %d %d\n", current_sector, sector_count, frame_size); break; } if(str->channels[channel].video_stream_index < 0){ /* allocate a new AVStream */ st = avformat_new_stream(s, NULL); if (!st) return AVERROR(ENOMEM); avpriv_set_pts_info(st, 64, 1, 15); str->channels[channel].video_stream_index = st->index; st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; st->codecpar->codec_id = AV_CODEC_ID_MDEC; st->codecpar->codec_tag = 0; /* no fourcc */ st->codecpar->width = AV_RL16(§or[0x28]); st->codecpar->height = AV_RL16(§or[0x2A]); } /* if this is the first sector of the frame, allocate a pkt */ pkt = &str->channels[channel].tmp_pkt; if(pkt->size != sector_count*VIDEO_DATA_CHUNK_SIZE){ if(pkt->data) av_log(s, AV_LOG_ERROR, "mismatching sector_count\n"); av_packet_unref(pkt); ret = av_new_packet(pkt, sector_count * VIDEO_DATA_CHUNK_SIZE); if (ret < 0) return ret; memset(pkt->data, 0, sector_count*VIDEO_DATA_CHUNK_SIZE); pkt->pos= avio_tell(pb) - RAW_CD_SECTOR_SIZE; pkt->stream_index = str->channels[channel].video_stream_index; } memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE, sector + VIDEO_DATA_HEADER_SIZE, VIDEO_DATA_CHUNK_SIZE); if (current_sector == sector_count-1) { pkt->size= frame_size; *ret_pkt = *pkt; pkt->data= NULL; pkt->size= -1; pkt->buf = NULL; return 0; } } break; case CDXA_TYPE_AUDIO: if(str->channels[channel].audio_stream_index < 0){ int fmt = sector[0x13]; /* allocate a new AVStream */ st = avformat_new_stream(s, NULL); if (!st) return AVERROR(ENOMEM); str->channels[channel].audio_stream_index = st->index; st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; st->codecpar->codec_id = AV_CODEC_ID_ADPCM_XA; st->codecpar->codec_tag = 0; /* no fourcc */ av_channel_layout_default(&st->codecpar->ch_layout, (fmt & 1) + 1); st->codecpar->sample_rate = (fmt&4)?18900:37800; // st->codecpar->bit_rate = 0; //FIXME; st->codecpar->block_align = 128; avpriv_set_pts_info(st, 64, 18 * 224 / st->codecpar->ch_layout.nb_channels, st->codecpar->sample_rate); st->start_time = 0; } pkt = ret_pkt; if ((ret = av_new_packet(pkt, 2304)) < 0) return ret; memcpy(pkt->data,sector+24,2304); pkt->stream_index = str->channels[channel].audio_stream_index; pkt->duration = 1; return 0; case CDXA_TYPE_EMPTY: /* CD-ROM XA, May 1991, 4.3.2.3 */ /* NOTE this also catches 0x80 (EOF bit) because of CDXA_TYPE_MASK */ /* TODO consider refactoring so as to explicitly handle each case? */ break; default: av_log(s, AV_LOG_WARNING, "Unknown sector type %02X\n", sector[0x12]); /* drop the sector and move on */ break; } if (avio_feof(pb)) return AVERROR(EIO); } } static int str_read_close(AVFormatContext *s) { StrDemuxContext *str = s->priv_data; int i; for(i=0; i<32; i++){ if(str->channels[i].tmp_pkt.data) av_packet_unref(&str->channels[i].tmp_pkt); } return 0; } const AVInputFormat ff_str_demuxer = { .name = "psxstr", .long_name = NULL_IF_CONFIG_SMALL("Sony Playstation STR"), .priv_data_size = sizeof(StrDemuxContext), .read_probe = str_probe, .read_header = str_read_header, .read_packet = str_read_packet, .read_close = str_read_close, .flags = AVFMT_NO_BYTE_SEEK, };