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Diffstat (limited to 'contrib/ffmpeg/libavformat/psxstr.c')
-rw-r--r--contrib/ffmpeg/libavformat/psxstr.c364
1 files changed, 364 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavformat/psxstr.c b/contrib/ffmpeg/libavformat/psxstr.c
new file mode 100644
index 000000000..2f1a3dc73
--- /dev/null
+++ b/contrib/ffmpeg/libavformat/psxstr.c
@@ -0,0 +1,364 @@
+/*
+ * 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 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 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 {
+
+ 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;
+ AVPacket tmp_pkt;
+} StrDemuxContext;
+
+static const char sync_header[12] = {0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00};
+
+static int str_probe(AVProbeData *p)
+{
+ int start;
+
+ /* need at least 0x38 bytes to validate */
+ if (p->buf_size < 0x38)
+ return 0;
+
+ if ((AV_RL32(&p->buf[0]) == RIFF_TAG) &&
+ (AV_RL32(&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 (memcmp(p->buf+start,sync_header,sizeof(sync_header)))
+ return 0;
+
+ /* MPEG files (like those ripped from VCDs) can also look like this;
+ * only return half certainty */
+ return 50;
+}
+
+#if 0
+static void dump(unsigned char *buf,size_t len)
+{
+ int i;
+ for(i=0;i<len;i++) {
+ if ((i&15)==0) av_log(NULL, AV_LOG_DEBUG, "%04x ",i);
+ av_log(NULL, AV_LOG_DEBUG, "%02x ",buf[i]);
+ if ((i&15)==15) av_log(NULL, AV_LOG_DEBUG, "\n");
+ }
+ av_log(NULL, AV_LOG_DEBUG, "\n");
+}
+#endif
+
+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;
+
+
+ /* skip over any RIFF header */
+ if (get_buffer(pb, sector, RIFF_HEADER_SIZE) != RIFF_HEADER_SIZE)
+ return AVERROR_IO;
+ if (AV_RL32(&sector[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;
+
+//printf("%02x %02x %02x %02x\n",sector[0x10],sector[0x11],sector[0x12],sector[0x13]);
+
+ 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 (AV_RL32(&sector[0x18]) != STR_MAGIC)
+ break;
+ str->video_channel = channel;
+ str->channels[channel].type = STR_VIDEO;
+ str->channels[channel].width = AV_RL16(&sector[0x28]);
+ str->channels[channel].height = AV_RL16(&sector[0x2A]);
+
+ /* allocate a new AVStream */
+ st = av_new_stream(s, 0);
+ if (!st)
+ return AVERROR_NOMEM;
+ av_set_pts_info(st, 64, 1, 15);
+
+ 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) {
+ int fmt;
+ 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;
+
+ /* allocate a new AVStream */
+ st = av_new_stream(s, 0);
+ if (!st)
+ return AVERROR_NOMEM;
+ av_set_pts_info(st, 64, 128, str->channels[channel].sample_rate);
+
+ str->channels[channel].audio_stream_index = st->index;
+
+ fmt = sector[0x13];
+ st->codec->codec_type = CODEC_TYPE_AUDIO;
+ st->codec->codec_id = CODEC_ID_ADPCM_XA;
+ st->codec->codec_tag = 0; /* no fourcc */
+ st->codec->channels = (fmt&1)?2:1;
+ st->codec->sample_rate = (fmt&4)?18900:37800;
+ // st->codec->bit_rate = 0; //FIXME;
+ st->codec->block_align = 128;
+ }
+ break;
+
+ default:
+ /* ignore */
+ break;
+ }
+ }
+
+if (str->video_channel != -1)
+ av_log (s, AV_LOG_DEBUG, " video channel = %d, %d x %d %d\n", str->video_channel,
+ str->channels[str->video_channel].width,
+ str->channels[str->video_channel].height,str->channels[str->video_channel].video_stream_index);
+if (str->audio_channel != -1)
+ av_log (s, AV_LOG_DEBUG, " audio channel = %d, %d Hz, %d channels, %d bits/sample %d\n",
+ str->audio_channel,
+ str->channels[str->audio_channel].sample_rate,
+ str->channels[str->audio_channel].channels,
+ str->channels[str->audio_channel].bits,str->channels[str->audio_channel].audio_stream_index);
+
+ /* back to the start */
+ url_fseek(pb, start, SEEK_SET);
+
+ return 0;
+}
+
+static int str_read_packet(AVFormatContext *s,
+ AVPacket *ret_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 ret = 0;
+ AVPacket *pkt;
+
+ while (!packet_read) {
+
+ 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 the video channel we care about */
+ if (channel == str->video_channel) {
+
+ int current_sector = AV_RL16(&sector[0x1C]);
+ int sector_count = AV_RL16(&sector[0x1E]);
+ int frame_size = AV_RL32(&sector[0x24]);
+ int bytes_to_copy;
+// printf("%d %d %d\n",current_sector,sector_count,frame_size);
+ /* if this is the first sector of the frame, allocate a pkt */
+ pkt = &str->tmp_pkt;
+ if (current_sector == 0) {
+ if (av_new_packet(pkt, frame_size))
+ return AVERROR_IO;
+
+ pkt->pos= url_ftell(pb) - RAW_CD_SECTOR_SIZE;
+ 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 */
+ bytes_to_copy = frame_size - current_sector*VIDEO_DATA_CHUNK_SIZE;
+ if (bytes_to_copy>0) {
+ if (bytes_to_copy>VIDEO_DATA_CHUNK_SIZE) bytes_to_copy=VIDEO_DATA_CHUNK_SIZE;
+ memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE,
+ sector + VIDEO_DATA_HEADER_SIZE, bytes_to_copy);
+ }
+ if (current_sector == sector_count-1) {
+ *ret_pkt = *pkt;
+ return 0;
+ }
+
+ }
+ break;
+
+ case CDXA_TYPE_AUDIO:
+#ifdef PRINTSTUFF
+printf (" dropping audio sector\n");
+#endif
+#if 1
+ /* check if this the video channel we care about */
+ if (channel == str->audio_channel) {
+ pkt = ret_pkt;
+ if (av_new_packet(pkt, 2304))
+ return AVERROR_IO;
+ memcpy(pkt->data,sector+24,2304);
+
+ pkt->stream_index =
+ str->channels[channel].audio_stream_index;
+ //pkt->pts = str->pts;
+ return 0;
+ }
+#endif
+ break;
+ default:
+ /* drop the sector and move on */
+#ifdef PRINTSTUFF
+printf (" dropping other sector\n");
+#endif
+ break;
+ }
+
+ if (url_feof(pb))
+ return AVERROR_IO;
+ }
+
+ return ret;
+}
+
+static int str_read_close(AVFormatContext *s)
+{
+ StrDemuxContext *str = (StrDemuxContext *)s->priv_data;
+
+ av_free(str->video_chunk);
+
+ return 0;
+}
+
+AVInputFormat str_demuxer = {
+ "psxstr",
+ "Sony Playstation STR format",
+ sizeof(StrDemuxContext),
+ str_probe,
+ str_read_header,
+ str_read_packet,
+ str_read_close,
+};
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