312 lines
9.9 KiB
C
Executable File
312 lines
9.9 KiB
C
Executable File
/*
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* Sony Playstation (PSX) STR File Demuxer
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* Copyright (c) 2003 The FFmpeg project
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* PSX STR file demuxer
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* by Mike Melanson (melanson@pcisys.net)
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* This module handles streams that have been ripped from Sony Playstation
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* CD games. This demuxer can handle either raw STR files (which are just
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* concatenations of raw compact disc sectors) or STR files with 0x2C-byte
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* RIFF headers, followed by CD sectors.
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*/
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#include "libavutil/channel_layout.h"
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#include "libavutil/internal.h"
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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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#include "internal.h"
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#define RIFF_TAG MKTAG('R', 'I', 'F', 'F')
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#define CDXA_TAG MKTAG('C', 'D', 'X', 'A')
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#define RAW_CD_SECTOR_SIZE 2352
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#define RAW_CD_SECTOR_DATA_SIZE 2304
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#define VIDEO_DATA_CHUNK_SIZE 0x7E0
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#define VIDEO_DATA_HEADER_SIZE 0x38
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#define RIFF_HEADER_SIZE 0x2C
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#define CDXA_TYPE_MASK 0x0E
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#define CDXA_TYPE_DATA 0x08
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#define CDXA_TYPE_AUDIO 0x04
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#define CDXA_TYPE_VIDEO 0x02
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#define STR_MAGIC (0x80010160)
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typedef struct StrChannel {
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/* video parameters */
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int video_stream_index;
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AVPacket tmp_pkt;
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/* audio parameters */
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int audio_stream_index;
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} StrChannel;
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typedef struct StrDemuxContext {
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/* a STR file can contain up to 32 channels of data */
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StrChannel channels[32];
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} StrDemuxContext;
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static const uint8_t sync_header[12] = {0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00};
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static int str_probe(const AVProbeData *p)
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{
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const uint8_t *sector= p->buf;
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const uint8_t *end= sector + p->buf_size;
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int aud=0, vid=0;
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if (p->buf_size < RAW_CD_SECTOR_SIZE)
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return 0;
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if ((AV_RL32(&p->buf[0]) == RIFF_TAG) &&
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(AV_RL32(&p->buf[8]) == CDXA_TAG)) {
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/* RIFF header seen; skip 0x2C bytes */
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sector += RIFF_HEADER_SIZE;
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}
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while (end - sector >= RAW_CD_SECTOR_SIZE) {
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/* look for CD sync header (00, 0xFF x 10, 00) */
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if (memcmp(sector,sync_header,sizeof(sync_header)))
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return 0;
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if (sector[0x11] >= 32)
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return 0;
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switch (sector[0x12] & CDXA_TYPE_MASK) {
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case CDXA_TYPE_DATA:
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case CDXA_TYPE_VIDEO: {
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int current_sector = AV_RL16(§or[0x1C]);
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int sector_count = AV_RL16(§or[0x1E]);
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int frame_size = AV_RL32(§or[0x24]);
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if(!( frame_size>=0
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&& current_sector < sector_count
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&& sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){
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return 0;
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}
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vid++;
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}
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break;
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case CDXA_TYPE_AUDIO:
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if(sector[0x13]&0x2A)
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return 0;
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aud++;
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break;
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default:
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if(sector[0x12] & CDXA_TYPE_MASK)
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return 0;
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}
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sector += RAW_CD_SECTOR_SIZE;
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}
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/* MPEG files (like those ripped from VCDs) can also look like this;
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* only return half certainty */
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if(vid+aud > 3) return AVPROBE_SCORE_EXTENSION;
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else if(vid+aud) return 1;
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else return 0;
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}
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static int str_read_header(AVFormatContext *s)
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{
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AVIOContext *pb = s->pb;
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StrDemuxContext *str = s->priv_data;
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unsigned char sector[RAW_CD_SECTOR_SIZE];
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int start;
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int i;
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/* skip over any RIFF header */
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if (avio_read(pb, sector, RIFF_HEADER_SIZE) != RIFF_HEADER_SIZE)
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return AVERROR(EIO);
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if (AV_RL32(§or[0]) == RIFF_TAG)
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start = RIFF_HEADER_SIZE;
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else
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start = 0;
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avio_seek(pb, start, SEEK_SET);
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for(i=0; i<32; i++){
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str->channels[i].video_stream_index=
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str->channels[i].audio_stream_index= -1;
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}
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s->ctx_flags |= AVFMTCTX_NOHEADER;
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return 0;
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}
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static int str_read_packet(AVFormatContext *s,
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AVPacket *ret_pkt)
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{
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AVIOContext *pb = s->pb;
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StrDemuxContext *str = s->priv_data;
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unsigned char sector[RAW_CD_SECTOR_SIZE];
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int channel, ret;
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AVPacket *pkt;
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AVStream *st;
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while (1) {
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if (avio_read(pb, sector, RAW_CD_SECTOR_SIZE) != RAW_CD_SECTOR_SIZE)
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return AVERROR(EIO);
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channel = sector[0x11];
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if (channel >= 32)
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return AVERROR_INVALIDDATA;
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switch (sector[0x12] & CDXA_TYPE_MASK) {
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case CDXA_TYPE_DATA:
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case CDXA_TYPE_VIDEO:
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{
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int current_sector = AV_RL16(§or[0x1C]);
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int sector_count = AV_RL16(§or[0x1E]);
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int frame_size = AV_RL32(§or[0x24]);
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if(!( frame_size>=0
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&& current_sector < sector_count
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&& sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){
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av_log(s, AV_LOG_ERROR, "Invalid parameters %d %d %d\n", current_sector, sector_count, frame_size);
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break;
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}
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if(str->channels[channel].video_stream_index < 0){
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/* allocate a new AVStream */
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st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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avpriv_set_pts_info(st, 64, 1, 15);
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str->channels[channel].video_stream_index = st->index;
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codecpar->codec_id = AV_CODEC_ID_MDEC;
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st->codecpar->codec_tag = 0; /* no fourcc */
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st->codecpar->width = AV_RL16(§or[0x28]);
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st->codecpar->height = AV_RL16(§or[0x2A]);
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}
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/* if this is the first sector of the frame, allocate a pkt */
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pkt = &str->channels[channel].tmp_pkt;
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if(pkt->size != sector_count*VIDEO_DATA_CHUNK_SIZE){
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if(pkt->data)
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av_log(s, AV_LOG_ERROR, "mismatching sector_count\n");
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av_packet_unref(pkt);
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ret = av_new_packet(pkt, sector_count * VIDEO_DATA_CHUNK_SIZE);
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if (ret < 0)
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return ret;
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memset(pkt->data, 0, sector_count*VIDEO_DATA_CHUNK_SIZE);
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pkt->pos= avio_tell(pb) - RAW_CD_SECTOR_SIZE;
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pkt->stream_index =
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str->channels[channel].video_stream_index;
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}
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memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE,
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sector + VIDEO_DATA_HEADER_SIZE,
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VIDEO_DATA_CHUNK_SIZE);
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if (current_sector == sector_count-1) {
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pkt->size= frame_size;
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*ret_pkt = *pkt;
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pkt->data= NULL;
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pkt->size= -1;
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pkt->buf = NULL;
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return 0;
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}
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}
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break;
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case CDXA_TYPE_AUDIO:
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if(str->channels[channel].audio_stream_index < 0){
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int fmt = sector[0x13];
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/* allocate a new AVStream */
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st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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str->channels[channel].audio_stream_index = st->index;
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codecpar->codec_id = AV_CODEC_ID_ADPCM_XA;
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st->codecpar->codec_tag = 0; /* no fourcc */
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if (fmt & 1) {
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st->codecpar->channels = 2;
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st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
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} else {
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st->codecpar->channels = 1;
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st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
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}
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st->codecpar->sample_rate = (fmt&4)?18900:37800;
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// st->codecpar->bit_rate = 0; //FIXME;
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st->codecpar->block_align = 128;
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avpriv_set_pts_info(st, 64, 18 * 224 / st->codecpar->channels,
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st->codecpar->sample_rate);
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st->start_time = 0;
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}
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pkt = ret_pkt;
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if ((ret = av_new_packet(pkt, 2304)) < 0)
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return ret;
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memcpy(pkt->data,sector+24,2304);
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pkt->stream_index =
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str->channels[channel].audio_stream_index;
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pkt->duration = 1;
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return 0;
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default:
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av_log(s, AV_LOG_WARNING, "Unknown sector type %02X\n", sector[0x12]);
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/* drop the sector and move on */
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break;
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}
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if (avio_feof(pb))
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return AVERROR(EIO);
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}
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}
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static int str_read_close(AVFormatContext *s)
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{
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StrDemuxContext *str = s->priv_data;
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int i;
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for(i=0; i<32; i++){
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if(str->channels[i].tmp_pkt.data)
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av_packet_unref(&str->channels[i].tmp_pkt);
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}
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return 0;
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}
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AVInputFormat ff_str_demuxer = {
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.name = "psxstr",
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.long_name = NULL_IF_CONFIG_SMALL("Sony Playstation STR"),
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.priv_data_size = sizeof(StrDemuxContext),
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.read_probe = str_probe,
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.read_header = str_read_header,
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.read_packet = str_read_packet,
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.read_close = str_read_close,
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.flags = AVFMT_NO_BYTE_SEEK,
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};
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