+++ /dev/null
-/*
- * Sony Playstation (PSX) STR File Demuxer
- * Copyright (c) 2003 The ffmpeg Project
- *
- * This library 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 of the License, or (at your option) any later version.
- *
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-/**
- * @file psxstr.c
- * 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 "avformat.h"
-
-//#define PRINTSTUFF
-
-#define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
-#define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
- (((uint8_t*)(x))[2] << 16) | \
- (((uint8_t*)(x))[1] << 8) | \
- ((uint8_t*)(x))[0])
-
-#define FOURCC_TAG( ch0, ch1, ch2, ch3 ) \
- ( (long)(unsigned char)(ch0) | \
- ( (long)(unsigned char)(ch1) << 8 ) | \
- ( (long)(unsigned char)(ch2) << 16 ) | \
- ( (long)(unsigned char)(ch3) << 24 ) )
-
-#define RIFF_TAG FOURCC_TAG('R', 'I', 'F', 'F')
-#define CDXA_TAG FOURCC_TAG('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 {
-
- int type;
-#define STR_AUDIO 0
-#define STR_VIDEO 1
-
- /* video parameters */
- int width;
- int height;
- int video_stream_index;
-
- /* audio parameters */
- int sample_rate;
- int channels;
- int bits;
- int audio_stream_index;
-} StrChannel;
-
-typedef struct StrDemuxContext {
-
- /* a STR file can contain up to 32 channels of data */
- StrChannel channels[32];
-
- /* only decode the first audio and video channels encountered */
- int video_channel;
- int audio_channel;
-
- int64_t pts;
-
- unsigned char *video_chunk;
-} StrDemuxContext;
-
-static int str_probe(AVProbeData *p)
-{
- int start;
-
- /* need at least 0x38 bytes to validate */
- if (p->buf_size < 0x38)
- return 0;
-
- if ((LE_32(&p->buf[0]) == RIFF_TAG) &&
- (LE_32(&p->buf[8]) == CDXA_TAG)) {
-
- /* RIFF header seen; skip 0x2C bytes */
- start = RIFF_HEADER_SIZE;
- } else
- start = 0;
-
- /* look for CD sync header (00, 0xFF x 10, 00) */
- if ((p->buf[start + 0] != 0x00) || (p->buf[start + 1] != 0xFF) ||
- (p->buf[start + 2] != 0xFF) || (p->buf[start + 3] != 0xFF) ||
- (p->buf[start + 4] != 0xFF) || (p->buf[start + 5] != 0xFF) ||
- (p->buf[start + 6] != 0xFF) || (p->buf[start + 7] != 0xFF) ||
- (p->buf[start + 8] != 0xFF) || (p->buf[start + 9] != 0xFF) ||
- (p->buf[start + 10] != 0xFF) || (p->buf[start + 11] != 0x00))
- return 0;
-
- /* MPEG files (like those ripped from VCDs) can also look like this;
- * only return half certainty */
- return 50;
-}
-
-static int str_read_header(AVFormatContext *s,
- AVFormatParameters *ap)
-{
- ByteIOContext *pb = &s->pb;
- StrDemuxContext *str = (StrDemuxContext *)s->priv_data;
- AVStream *st;
- unsigned char sector[RAW_CD_SECTOR_SIZE];
- int start;
- int i;
- int channel;
-
- /* initialize context members */
- str->pts = 0;
- str->audio_channel = -1; /* assume to audio or video */
- str->video_channel = -1;
- str->video_chunk = NULL;
-
- /* set the pts reference (1 pts = 1/90000) */
- s->pts_num = 1;
- s->pts_den = 90000;
-
- /* skip over any RIFF header */
- if (get_buffer(pb, sector, RIFF_HEADER_SIZE) != RIFF_HEADER_SIZE)
- return AVERROR_IO;
- if (LE_32(§or[0]) == RIFF_TAG)
- start = RIFF_HEADER_SIZE;
- else
- start = 0;
-
- url_fseek(pb, start, SEEK_SET);
-
- /* check through the first 32 sectors for individual channels */
- for (i = 0; i < 32; i++) {
- if (get_buffer(pb, sector, RAW_CD_SECTOR_SIZE) != RAW_CD_SECTOR_SIZE)
- return AVERROR_IO;
-
- channel = sector[0x11];
- if (channel >= 32)
- return AVERROR_INVALIDDATA;
-
- switch (sector[0x12] & CDXA_TYPE_MASK) {
-
- case CDXA_TYPE_DATA:
- case CDXA_TYPE_VIDEO:
- /* check if this channel gets to be the dominant video channel */
- if (str->video_channel == -1) {
- /* qualify the magic number */
- if (LE_32(§or[0x18]) != STR_MAGIC)
- break;
- str->video_channel = channel;
- str->channels[channel].type = STR_VIDEO;
- str->channels[channel].width = LE_16(§or[0x28]);
- str->channels[channel].height = LE_16(§or[0x2A]);
-
- /* allocate a new AVStream */
- st = av_new_stream(s, 0);
- if (!st)
- return AVERROR_NOMEM;
-
- str->channels[channel].video_stream_index = st->index;
-
- st->codec.codec_type = CODEC_TYPE_VIDEO;
- st->codec.codec_id = CODEC_ID_MDEC;
- st->codec.codec_tag = 0; /* no fourcc */
- st->codec.width = str->channels[channel].width;
- st->codec.height = str->channels[channel].height;
- }
- break;
-
- case CDXA_TYPE_AUDIO:
- /* check if this channel gets to be the dominant audio channel */
- if (str->audio_channel == -1) {
- str->audio_channel = channel;
- str->channels[channel].type = STR_AUDIO;
- str->channels[channel].channels =
- (sector[0x13] & 0x01) ? 2 : 1;
- str->channels[channel].sample_rate =
- (sector[0x13] & 0x04) ? 18900 : 37800;
- str->channels[channel].bits =
- (sector[0x13] & 0x10) ? 8 : 4;
- }
- break;
-
- default:
- /* ignore */
- break;
- }
- }
-
-if (str->video_channel != -1)
- printf (" video channel = %d, %d x %d\n", str->video_channel,
- str->channels[str->video_channel].width,
- str->channels[str->video_channel].height);
-if (str->audio_channel != -1)
- printf (" audio channel = %d, %d Hz, %d channels, %d bits/sample\n",
- str->video_channel,
- str->channels[str->video_channel].sample_rate,
- str->channels[str->video_channel].channels,
- str->channels[str->video_channel].bits);
-
- /* back to the start */
- url_fseek(pb, start, SEEK_SET);
-
- return 0;
-}
-
-static int str_read_packet(AVFormatContext *s,
- AVPacket *pkt)
-{
- ByteIOContext *pb = &s->pb;
- StrDemuxContext *str = (StrDemuxContext *)s->priv_data;
- unsigned char sector[RAW_CD_SECTOR_SIZE];
- int channel;
- int packet_read = 0;
- int video_sector_count = 0;
- int current_video_sector = 0;
- int video_frame_size = 0;
- int video_frame_index = 0;
- int bytes_to_copy;
- int ret = 0;
-
- while (!packet_read) {
-
- if (get_buffer(pb, sector, RAW_CD_SECTOR_SIZE) != RAW_CD_SECTOR_SIZE)
- return -EIO;
-
- channel = sector[0x11];
- if (channel >= 32)
- return AVERROR_INVALIDDATA;
-
- switch (sector[0x12] & CDXA_TYPE_MASK) {
-
- case CDXA_TYPE_DATA:
- case CDXA_TYPE_VIDEO:
- /* check if this the video channel we care about */
- if (channel == str->video_channel) {
-
- /* if this is the first sector of the frame, allocate a pkt */
- if (current_video_sector == 0) {
- video_frame_size = LE_32(§or[0x24]);
- video_sector_count = LE_16(§or[0x1E]);
- if (av_new_packet(pkt, video_frame_size))
- return -EIO;
-
- pkt->stream_index =
- str->channels[channel].video_stream_index;
- pkt->pts = str->pts;
-
- /* if there is no audio, adjust the pts after every video
- * frame; assume 15 fps */
- if (str->audio_channel != -1)
- str->pts += (90000 / 15);
- }
-
- /* load all the constituent chunks in the video packet */
- if (video_frame_size - video_frame_index < VIDEO_DATA_CHUNK_SIZE)
- bytes_to_copy = video_frame_size - video_frame_index;
- else
- bytes_to_copy = VIDEO_DATA_CHUNK_SIZE;
- if (video_frame_index < video_frame_size)
- memcpy(&pkt->data[video_frame_index],
- §or[VIDEO_DATA_HEADER_SIZE], bytes_to_copy);
-
-#ifdef PRINTSTUFF
-printf (" chunk %d/%d (bytes %d/%d), first 6 bytes = %02X %02X %02X %02X %02X %02X\n",
- current_video_sector, video_sector_count,
- video_frame_index, video_frame_size,
- pkt->data[current_video_sector * VIDEO_DATA_CHUNK_SIZE + 0],
- pkt->data[current_video_sector * VIDEO_DATA_CHUNK_SIZE + 1],
- pkt->data[current_video_sector * VIDEO_DATA_CHUNK_SIZE + 2],
- pkt->data[current_video_sector * VIDEO_DATA_CHUNK_SIZE + 3],
- pkt->data[current_video_sector * VIDEO_DATA_CHUNK_SIZE + 4],
- pkt->data[current_video_sector * VIDEO_DATA_CHUNK_SIZE + 5]);
-#endif
-
- video_frame_index += bytes_to_copy;
- /* must keep reading sectors until all current video sectors
- * are consumed */
- current_video_sector++;
- if (current_video_sector >= video_sector_count)
- packet_read = 1;
-
- }
- break;
-
- case CDXA_TYPE_AUDIO:
-#ifdef PRINTSTUFF
-printf (" dropping audio sector\n");
-#endif
- break;
- default:
- /* drop the sector and move on */
-#ifdef PRINTSTUFF
-printf (" dropping other sector\n");
-#endif
- break;
- }
-
- if (url_feof(pb))
- return -EIO;
- }
-
- return ret;
-}
-
-static int str_read_close(AVFormatContext *s)
-{
- StrDemuxContext *str = (StrDemuxContext *)s->priv_data;
-
- av_free(str->video_chunk);
-
- return 0;
-}
-
-static AVInputFormat str_iformat = {
- "psxstr",
- "Sony Playstation STR format",
- sizeof(StrDemuxContext),
- str_probe,
- str_read_header,
- str_read_packet,
- str_read_close,
-};
-
-int str_init(void)
-{
- av_register_input_format(&str_iformat);
- return 0;
-}
projects / synfig.git / blobdiff