| /* |
| * 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 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) { |
| |
| if (avio_read(pb, sector, RAW_CD_SECTOR_SIZE) != 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 */ |
| if (fmt & 1) { |
| st->codecpar->channels = 2; |
| st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO; |
| } else { |
| st->codecpar->channels = 1; |
| st->codecpar->channel_layout = AV_CH_LAYOUT_MONO; |
| } |
| 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->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; |
| 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; |
| } |
| |
| 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, |
| }; |