making act segmenter

1 files changed, 372 insertions, 0 deletions

diff --git a/ffmpeg/libavformat/4xm.c b/ffmpeg/libavformat/4xm.c
new file mode 100644
index 0000000..1e142f5
--- /dev/null
+++ b/ffmpeg/libavformat/4xm.c
@@ -0,0 +1,372 @@
+/*
+ * 4X Technologies .4xm File Demuxer (no muxer)
+ * 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
+ * 4X Technologies file demuxer
+ * by Mike Melanson (melanson@pcisys.net)
+ * for more information on the .4xm file format, visit:
+ *   http://www.pcisys.net/~melanson/codecs/
+ */
+
+#include "libavutil/intreadwrite.h"
+#include "libavutil/intfloat.h"
+#include "avformat.h"
+#include "internal.h"
+
+#define     RIFF_TAG MKTAG('R', 'I', 'F', 'F')
+#define  FOURXMV_TAG MKTAG('4', 'X', 'M', 'V')
+#define     LIST_TAG MKTAG('L', 'I', 'S', 'T')
+#define     HEAD_TAG MKTAG('H', 'E', 'A', 'D')
+#define     TRK__TAG MKTAG('T', 'R', 'K', '_')
+#define     MOVI_TAG MKTAG('M', 'O', 'V', 'I')
+#define     VTRK_TAG MKTAG('V', 'T', 'R', 'K')
+#define     STRK_TAG MKTAG('S', 'T', 'R', 'K')
+#define     std__TAG MKTAG('s', 't', 'd', '_')
+#define     name_TAG MKTAG('n', 'a', 'm', 'e')
+#define     vtrk_TAG MKTAG('v', 't', 'r', 'k')
+#define     strk_TAG MKTAG('s', 't', 'r', 'k')
+#define     ifrm_TAG MKTAG('i', 'f', 'r', 'm')
+#define     pfrm_TAG MKTAG('p', 'f', 'r', 'm')
+#define     cfrm_TAG MKTAG('c', 'f', 'r', 'm')
+#define     ifr2_TAG MKTAG('i', 'f', 'r', '2')
+#define     pfr2_TAG MKTAG('p', 'f', 'r', '2')
+#define     cfr2_TAG MKTAG('c', 'f', 'r', '2')
+#define     snd__TAG MKTAG('s', 'n', 'd', '_')
+
+#define vtrk_SIZE 0x44
+#define strk_SIZE 0x28
+
+#define GET_LIST_HEADER() \
+    fourcc_tag = avio_rl32(pb); \
+    size = avio_rl32(pb); \
+    if (fourcc_tag != LIST_TAG) \
+        return AVERROR_INVALIDDATA; \
+    fourcc_tag = avio_rl32(pb);
+
+typedef struct AudioTrack {
+    int sample_rate;
+    int bits;
+    int channels;
+    int stream_index;
+    int adpcm;
+    int64_t audio_pts;
+} AudioTrack;
+
+typedef struct FourxmDemuxContext {
+    int width;
+    int height;
+    int video_stream_index;
+    int track_count;
+    AudioTrack *tracks;
+
+    int64_t video_pts;
+    float fps;
+} FourxmDemuxContext;
+
+static int fourxm_probe(AVProbeData *p)
+{
+    if ((AV_RL32(&p->buf[0]) != RIFF_TAG) ||
+        (AV_RL32(&p->buf[8]) != FOURXMV_TAG))
+        return 0;
+
+    return AVPROBE_SCORE_MAX;
+}
+
+static int fourxm_read_header(AVFormatContext *s)
+{
+    AVIOContext *pb = s->pb;
+    unsigned int fourcc_tag;
+    unsigned int size;
+    int header_size;
+    FourxmDemuxContext *fourxm = s->priv_data;
+    unsigned char *header;
+    int i, ret;
+    AVStream *st;
+
+    fourxm->track_count = 0;
+    fourxm->tracks = NULL;
+    fourxm->fps = 1.0;
+
+    /* skip the first 3 32-bit numbers */
+    avio_skip(pb, 12);
+
+    /* check for LIST-HEAD */
+    GET_LIST_HEADER();
+    header_size = size - 4;
+    if (fourcc_tag != HEAD_TAG || header_size < 0)
+        return AVERROR_INVALIDDATA;
+
+    /* allocate space for the header and load the whole thing */
+    header = av_malloc(header_size);
+    if (!header)
+        return AVERROR(ENOMEM);
+    if (avio_read(pb, header, header_size) != header_size){
+        av_free(header);
+        return AVERROR(EIO);
+    }
+
+    /* take the lazy approach and search for any and all vtrk and strk chunks */
+    for (i = 0; i < header_size - 8; i++) {
+        fourcc_tag = AV_RL32(&header[i]);
+        size = AV_RL32(&header[i + 4]);
+        if (size > header_size - i - 8 && (fourcc_tag == vtrk_TAG || fourcc_tag == strk_TAG)) {
+            av_log(s, AV_LOG_ERROR, "chunk larger than array %d>%d\n", size, header_size - i - 8);
+            return AVERROR_INVALIDDATA;
+        }
+
+        if (fourcc_tag == std__TAG) {
+            if (header_size < i + 16) {
+                av_log(s, AV_LOG_ERROR, "std TAG truncated\n");
+                return AVERROR_INVALIDDATA;
+            }
+            fourxm->fps = av_int2float(AV_RL32(&header[i + 12]));
+        } else if (fourcc_tag == vtrk_TAG) {
+            /* check that there is enough data */
+            if (size != vtrk_SIZE) {
+                ret= AVERROR_INVALIDDATA;
+                goto fail;
+            }
+            fourxm->width  = AV_RL32(&header[i + 36]);
+            fourxm->height = AV_RL32(&header[i + 40]);
+
+            /* allocate a new AVStream */
+            st = avformat_new_stream(s, NULL);
+            if (!st){
+                ret= AVERROR(ENOMEM);
+                goto fail;
+            }
+            avpriv_set_pts_info(st, 60, 1, fourxm->fps);
+
+            fourxm->video_stream_index = st->index;
+
+            st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+            st->codec->codec_id = AV_CODEC_ID_4XM;
+            st->codec->extradata_size = 4;
+            st->codec->extradata = av_malloc(4);
+            AV_WL32(st->codec->extradata, AV_RL32(&header[i + 16]));
+            st->codec->width  = fourxm->width;
+            st->codec->height = fourxm->height;
+
+            i += 8 + size;
+        } else if (fourcc_tag == strk_TAG) {
+            int current_track;
+            /* check that there is enough data */
+            if (size != strk_SIZE) {
+                ret= AVERROR_INVALIDDATA;
+                goto fail;
+            }
+            current_track = AV_RL32(&header[i + 8]);
+            if((unsigned)current_track >= UINT_MAX / sizeof(AudioTrack) - 1){
+                av_log(s, AV_LOG_ERROR, "current_track too large\n");
+                ret = AVERROR_INVALIDDATA;
+                goto fail;
+            }
+            if (current_track + 1 > fourxm->track_count) {
+                fourxm->tracks = av_realloc_f(fourxm->tracks,
+                                              sizeof(AudioTrack),
+                                              current_track + 1);
+                if (!fourxm->tracks) {
+                    ret = AVERROR(ENOMEM);
+                    goto fail;
+                }
+                memset(&fourxm->tracks[fourxm->track_count], 0,
+                       sizeof(AudioTrack) * (current_track + 1 - fourxm->track_count));
+                fourxm->track_count = current_track + 1;
+            }
+            fourxm->tracks[current_track].adpcm       = AV_RL32(&header[i + 12]);
+            fourxm->tracks[current_track].channels    = AV_RL32(&header[i + 36]);
+            fourxm->tracks[current_track].sample_rate = AV_RL32(&header[i + 40]);
+            fourxm->tracks[current_track].bits        = AV_RL32(&header[i + 44]);
+            fourxm->tracks[current_track].audio_pts   = 0;
+            if(   fourxm->tracks[current_track].channels    <= 0
+               || fourxm->tracks[current_track].sample_rate <= 0
+               || fourxm->tracks[current_track].bits        <  0){
+                av_log(s, AV_LOG_ERROR, "audio header invalid\n");
+                ret = AVERROR_INVALIDDATA;
+                goto fail;
+            }
+            if(!fourxm->tracks[current_track].adpcm && fourxm->tracks[current_track].bits<8){
+                av_log(s, AV_LOG_ERROR, "bits unspecified for non ADPCM\n");
+                ret = AVERROR_INVALIDDATA;
+                goto fail;
+            }
+            i += 8 + size;
+
+            /* allocate a new AVStream */
+            st = avformat_new_stream(s, NULL);
+            if (!st){
+                ret= AVERROR(ENOMEM);
+                goto fail;
+            }
+
+            st->id = current_track;
+            avpriv_set_pts_info(st, 60, 1, fourxm->tracks[current_track].sample_rate);
+
+            fourxm->tracks[current_track].stream_index = st->index;
+
+            st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+            st->codec->codec_tag = 0;
+            st->codec->channels              = fourxm->tracks[current_track].channels;
+            st->codec->sample_rate           = fourxm->tracks[current_track].sample_rate;
+            st->codec->bits_per_coded_sample = fourxm->tracks[current_track].bits;
+            st->codec->bit_rate              = st->codec->channels * st->codec->sample_rate *
+                st->codec->bits_per_coded_sample;
+            st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
+            if (fourxm->tracks[current_track].adpcm){
+                st->codec->codec_id = AV_CODEC_ID_ADPCM_4XM;
+            }else if (st->codec->bits_per_coded_sample == 8){
+                st->codec->codec_id = AV_CODEC_ID_PCM_U8;
+            }else
+                st->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
+        }
+    }
+
+    /* skip over the LIST-MOVI chunk (which is where the stream should be */
+    GET_LIST_HEADER();
+    if (fourcc_tag != MOVI_TAG){
+        ret= AVERROR_INVALIDDATA;
+        goto fail;
+    }
+
+    av_free(header);
+    /* initialize context members */
+    fourxm->video_pts = -1;  /* first frame will push to 0 */
+
+    return 0;
+fail:
+    av_freep(&fourxm->tracks);
+    av_free(header);
+    return ret;
+}
+
+static int fourxm_read_packet(AVFormatContext *s,
+                              AVPacket *pkt)
+{
+    FourxmDemuxContext *fourxm = s->priv_data;
+    AVIOContext *pb = s->pb;
+    unsigned int fourcc_tag;
+    unsigned int size;
+    int ret = 0;
+    unsigned int track_number;
+    int packet_read = 0;
+    unsigned char header[8];
+    int audio_frame_count;
+
+    while (!packet_read) {
+
+        if ((ret = avio_read(s->pb, header, 8)) < 0)
+            return ret;
+        fourcc_tag = AV_RL32(&header[0]);
+        size = AV_RL32(&header[4]);
+        if (url_feof(pb))
+            return AVERROR(EIO);
+        switch (fourcc_tag) {
+
+        case LIST_TAG:
+            /* this is a good time to bump the video pts */
+            fourxm->video_pts ++;
+
+            /* skip the LIST-* tag and move on to the next fourcc */
+            avio_rl32(pb);
+            break;
+
+        case ifrm_TAG:
+        case pfrm_TAG:
+        case cfrm_TAG:
+        case ifr2_TAG:
+        case pfr2_TAG:
+        case cfr2_TAG:
+            /* allocate 8 more bytes than 'size' to account for fourcc
+             * and size */
+            if (size + 8 < size || av_new_packet(pkt, size + 8))
+                return AVERROR(EIO);
+            pkt->stream_index = fourxm->video_stream_index;
+            pkt->pts = fourxm->video_pts;
+            pkt->pos = avio_tell(s->pb);
+            memcpy(pkt->data, header, 8);
+            ret = avio_read(s->pb, &pkt->data[8], size);
+
+            if (ret < 0){
+                av_free_packet(pkt);
+            }else
+                packet_read = 1;
+            break;
+
+        case snd__TAG:
+            track_number = avio_rl32(pb);
+            avio_skip(pb, 4);
+            size-=8;
+
+            if (track_number < fourxm->track_count && fourxm->tracks[track_number].channels>0) {
+                ret= av_get_packet(s->pb, pkt, size);
+                if(ret<0)
+                    return AVERROR(EIO);
+                pkt->stream_index =
+                    fourxm->tracks[track_number].stream_index;
+                pkt->pts = fourxm->tracks[track_number].audio_pts;
+                packet_read = 1;
+
+                /* pts accounting */
+                audio_frame_count = size;
+                if (fourxm->tracks[track_number].adpcm)
+                    audio_frame_count -=
+                        2 * (fourxm->tracks[track_number].channels);
+                audio_frame_count /=
+                      fourxm->tracks[track_number].channels;
+                if (fourxm->tracks[track_number].adpcm){
+                    audio_frame_count *= 2;
+                }else
+                    audio_frame_count /=
+                    (fourxm->tracks[track_number].bits / 8);
+                fourxm->tracks[track_number].audio_pts += audio_frame_count;
+
+            } else {
+                avio_skip(pb, size);
+            }
+            break;
+
+        default:
+            avio_skip(pb, size);
+            break;
+        }
+    }
+    return ret;
+}
+
+static int fourxm_read_close(AVFormatContext *s)
+{
+    FourxmDemuxContext *fourxm = s->priv_data;
+
+    av_freep(&fourxm->tracks);
+
+    return 0;
+}
+
+AVInputFormat ff_fourxm_demuxer = {
+    .name           = "4xm",
+    .long_name      = NULL_IF_CONFIG_SMALL("4X Technologies"),
+    .priv_data_size = sizeof(FourxmDemuxContext),
+    .read_probe     = fourxm_probe,
+    .read_header    = fourxm_read_header,
+    .read_packet    = fourxm_read_packet,
+    .read_close     = fourxm_read_close,
+};