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366 lines
11 KiB
366 lines
11 KiB
/* |
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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 library 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 of the License, or (at your option) any later version. |
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* |
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* This library 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 this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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/** |
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* @file psxstr.c |
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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 "avformat.h" |
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//#define PRINTSTUFF |
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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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int type; |
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#define STR_AUDIO 0 |
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#define STR_VIDEO 1 |
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/* video parameters */ |
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int width; |
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int height; |
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int video_stream_index; |
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/* audio parameters */ |
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int sample_rate; |
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int channels; |
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int bits; |
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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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/* only decode the first audio and video channels encountered */ |
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int video_channel; |
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int audio_channel; |
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int64_t pts; |
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unsigned char *video_chunk; |
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AVPacket tmp_pkt; |
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} StrDemuxContext; |
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const static char sync_header[12] = {0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00}; |
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static int str_probe(AVProbeData *p) |
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{ |
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int start; |
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/* need at least 0x38 bytes to validate */ |
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if (p->buf_size < 0x38) |
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return 0; |
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if ((LE_32(&p->buf[0]) == RIFF_TAG) && |
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(LE_32(&p->buf[8]) == CDXA_TAG)) { |
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/* RIFF header seen; skip 0x2C bytes */ |
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start = RIFF_HEADER_SIZE; |
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} else |
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start = 0; |
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/* look for CD sync header (00, 0xFF x 10, 00) */ |
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if (memcmp(p->buf+start,sync_header,sizeof(sync_header))) |
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return 0; |
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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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return 50; |
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} |
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static void dump(unsigned char *buf,size_t len) |
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{ |
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int i; |
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for(i=0;i<len;i++) { |
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if ((i&15)==0) av_log(NULL, AV_LOG_DEBUG, "%04x ",i); |
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av_log(NULL, AV_LOG_DEBUG, "%02x ",buf[i]); |
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if ((i&15)==15) av_log(NULL, AV_LOG_DEBUG, "\n"); |
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} |
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av_log(NULL, AV_LOG_DEBUG, "\n"); |
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} |
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static int str_read_header(AVFormatContext *s, |
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AVFormatParameters *ap) |
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{ |
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ByteIOContext *pb = &s->pb; |
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StrDemuxContext *str = (StrDemuxContext *)s->priv_data; |
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AVStream *st; |
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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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int channel; |
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/* initialize context members */ |
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str->pts = 0; |
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str->audio_channel = -1; /* assume to audio or video */ |
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str->video_channel = -1; |
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str->video_chunk = NULL; |
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/* skip over any RIFF header */ |
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if (get_buffer(pb, sector, RIFF_HEADER_SIZE) != RIFF_HEADER_SIZE) |
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return AVERROR_IO; |
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if (LE_32(§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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url_fseek(pb, start, SEEK_SET); |
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/* check through the first 32 sectors for individual channels */ |
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for (i = 0; i < 32; i++) { |
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if (get_buffer(pb, sector, RAW_CD_SECTOR_SIZE) != RAW_CD_SECTOR_SIZE) |
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return AVERROR_IO; |
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//printf("%02x %02x %02x %02x\n",sector[0x10],sector[0x11],sector[0x12],sector[0x13]); |
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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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/* check if this channel gets to be the dominant video channel */ |
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if (str->video_channel == -1) { |
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/* qualify the magic number */ |
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if (LE_32(§or[0x18]) != STR_MAGIC) |
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break; |
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str->video_channel = channel; |
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str->channels[channel].type = STR_VIDEO; |
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str->channels[channel].width = LE_16(§or[0x28]); |
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str->channels[channel].height = LE_16(§or[0x2A]); |
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/* allocate a new AVStream */ |
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st = av_new_stream(s, 0); |
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if (!st) |
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return AVERROR_NOMEM; |
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/* set the pts reference (1 pts = 1/90000) */ |
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av_set_pts_info(st, 33, 1, 90000); |
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str->channels[channel].video_stream_index = st->index; |
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st->codec.codec_type = CODEC_TYPE_VIDEO; |
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st->codec.codec_id = CODEC_ID_MDEC; |
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st->codec.codec_tag = 0; /* no fourcc */ |
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st->codec.width = str->channels[channel].width; |
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st->codec.height = str->channels[channel].height; |
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} |
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break; |
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case CDXA_TYPE_AUDIO: |
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/* check if this channel gets to be the dominant audio channel */ |
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if (str->audio_channel == -1) { |
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int fmt; |
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str->audio_channel = channel; |
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str->channels[channel].type = STR_AUDIO; |
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str->channels[channel].channels = |
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(sector[0x13] & 0x01) ? 2 : 1; |
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str->channels[channel].sample_rate = |
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(sector[0x13] & 0x04) ? 18900 : 37800; |
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str->channels[channel].bits = |
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(sector[0x13] & 0x10) ? 8 : 4; |
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/* allocate a new AVStream */ |
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st = av_new_stream(s, 0); |
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if (!st) |
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return AVERROR_NOMEM; |
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av_set_pts_info(st, 33, 1, 90000); |
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str->channels[channel].audio_stream_index = st->index; |
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fmt = sector[0x13]; |
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st->codec.codec_type = CODEC_TYPE_AUDIO; |
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st->codec.codec_id = CODEC_ID_ADPCM_XA; |
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st->codec.codec_tag = 0; /* no fourcc */ |
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st->codec.channels = (fmt&1)?2:1; |
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st->codec.sample_rate = (fmt&4)?18900:37800; |
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// st->codec.bit_rate = 0; //FIXME; |
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st->codec.block_align = 128; |
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} |
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break; |
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default: |
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/* ignore */ |
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break; |
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} |
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} |
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if (str->video_channel != -1) |
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av_log (s, AV_LOG_DEBUG, " video channel = %d, %d x %d %d\n", str->video_channel, |
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str->channels[str->video_channel].width, |
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str->channels[str->video_channel].height,str->channels[str->video_channel].video_stream_index); |
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if (str->audio_channel != -1) |
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av_log (s, AV_LOG_DEBUG, " audio channel = %d, %d Hz, %d channels, %d bits/sample %d\n", |
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str->audio_channel, |
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str->channels[str->audio_channel].sample_rate, |
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str->channels[str->audio_channel].channels, |
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str->channels[str->audio_channel].bits,str->channels[str->audio_channel].audio_stream_index); |
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/* back to the start */ |
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url_fseek(pb, start, SEEK_SET); |
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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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ByteIOContext *pb = &s->pb; |
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StrDemuxContext *str = (StrDemuxContext *)s->priv_data; |
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unsigned char sector[RAW_CD_SECTOR_SIZE]; |
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int channel; |
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int packet_read = 0; |
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int ret = 0; |
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AVPacket *pkt; |
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while (!packet_read) { |
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if (get_buffer(pb, sector, RAW_CD_SECTOR_SIZE) != RAW_CD_SECTOR_SIZE) |
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return AVERROR_IO; |
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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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/* check if this the video channel we care about */ |
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if (channel == str->video_channel) { |
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int current_sector = LE_16(§or[0x1C]); |
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int sector_count = LE_16(§or[0x1E]); |
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int frame_size = LE_32(§or[0x24]); |
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int bytes_to_copy; |
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// printf("%d %d %d\n",current_sector,sector_count,frame_size); |
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/* if this is the first sector of the frame, allocate a pkt */ |
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pkt = &str->tmp_pkt; |
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if (current_sector == 0) { |
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if (av_new_packet(pkt, frame_size)) |
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return AVERROR_IO; |
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pkt->stream_index = |
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str->channels[channel].video_stream_index; |
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// pkt->pts = str->pts; |
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/* if there is no audio, adjust the pts after every video |
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* frame; assume 15 fps */ |
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if (str->audio_channel != -1) |
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str->pts += (90000 / 15); |
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} |
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/* load all the constituent chunks in the video packet */ |
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bytes_to_copy = frame_size - current_sector*VIDEO_DATA_CHUNK_SIZE; |
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if (bytes_to_copy>0) { |
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if (bytes_to_copy>VIDEO_DATA_CHUNK_SIZE) bytes_to_copy=VIDEO_DATA_CHUNK_SIZE; |
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memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE, |
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sector + VIDEO_DATA_HEADER_SIZE, bytes_to_copy); |
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} |
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if (current_sector == sector_count-1) { |
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*ret_pkt = *pkt; |
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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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#ifdef PRINTSTUFF |
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printf (" dropping audio sector\n"); |
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#endif |
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#if 1 |
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/* check if this the video channel we care about */ |
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if (channel == str->audio_channel) { |
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pkt = ret_pkt; |
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if (av_new_packet(pkt, 2304)) |
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return AVERROR_IO; |
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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->pts = str->pts; |
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return 0; |
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} |
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#endif |
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break; |
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default: |
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/* drop the sector and move on */ |
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#ifdef PRINTSTUFF |
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printf (" dropping other sector\n"); |
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#endif |
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break; |
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} |
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if (url_feof(pb)) |
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return AVERROR_IO; |
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} |
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return ret; |
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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 = (StrDemuxContext *)s->priv_data; |
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av_free(str->video_chunk); |
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return 0; |
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} |
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static AVInputFormat str_iformat = { |
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"psxstr", |
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"Sony Playstation STR format", |
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sizeof(StrDemuxContext), |
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str_probe, |
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str_read_header, |
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str_read_packet, |
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str_read_close, |
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}; |
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int str_init(void) |
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{ |
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av_register_input_format(&str_iformat); |
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return 0; |
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}
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