making act segmenter

1 files changed, 317 insertions, 0 deletions

diff --git a/ffmpeg/libavformat/psxstr.c b/ffmpeg/libavformat/psxstr.c
new file mode 100644
index 0000000..90c933e
--- /dev/null
+++ b/ffmpeg/libavformat/psxstr.c
@@ -0,0 +1,317 @@
+/*
+ * 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/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(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(&sector[0x1C]);
+                int sector_count   = AV_RL16(&sector[0x1E]);
+                int frame_size = AV_RL32(&sector[0x24]);
+
+                if(!(   frame_size>=0
+                     && current_sector < sector_count
+                     && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){
+                    return 0;
+                }
+
+                /*st->codec->width      = AV_RL16(&sector[0x28]);
+                st->codec->height     = AV_RL16(&sector[0x2A]);*/
+
+//                 if (current_sector == sector_count-1) {
+                    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 50;
+    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(&sector[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;
+    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(&sector[0x1C]);
+                int sector_count   = AV_RL16(&sector[0x1E]);
+                int frame_size = AV_RL32(&sector[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->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+                    st->codec->codec_id   = AV_CODEC_ID_MDEC;
+                    st->codec->codec_tag  = 0;  /* no fourcc */
+                    st->codec->width      = AV_RL16(&sector[0x28]);
+                    st->codec->height     = AV_RL16(&sector[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, "missmatching sector_count\n");
+                    av_free_packet(pkt);
+                    if (av_new_packet(pkt, sector_count*VIDEO_DATA_CHUNK_SIZE))
+                        return AVERROR(EIO);
+
+                    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;
+#if FF_API_DESTRUCT_PACKET
+                    pkt->destruct = NULL;
+#endif
+                    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->codec->codec_type  = AVMEDIA_TYPE_AUDIO;
+                st->codec->codec_id    = AV_CODEC_ID_ADPCM_XA;
+                st->codec->codec_tag   = 0;  /* no fourcc */
+                if (fmt & 1) {
+                    st->codec->channels       = 2;
+                    st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
+                } else {
+                    st->codec->channels       = 1;
+                    st->codec->channel_layout = AV_CH_LAYOUT_MONO;
+                }
+                st->codec->sample_rate = (fmt&4)?18900:37800;
+            //    st->codec->bit_rate = 0; //FIXME;
+                st->codec->block_align = 128;
+
+                avpriv_set_pts_info(st, 64, 18 * 224 / st->codec->channels,
+                                    st->codec->sample_rate);
+                st->start_time = 0;
+            }
+            pkt = ret_pkt;
+            if (av_new_packet(pkt, 2304))
+                return AVERROR(EIO);
+            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 (url_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_free_packet(&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,
+};