making act segmenter

1 files changed, 485 insertions, 0 deletions

diff --git a/ffmpeg/libavformat/iff.c b/ffmpeg/libavformat/iff.c
new file mode 100644
index 0000000..1efc147
--- /dev/null
+++ b/ffmpeg/libavformat/iff.c
@@ -0,0 +1,485 @@
+/*
+ * Copyright (c) 2008 Jaikrishnan Menon <realityman@gmx.net>
+ * Copyright (c) 2010 Peter Ross <pross@xvid.org>
+ * Copyright (c) 2010 Sebastian Vater <cdgs.basty@googlemail.com>
+ *
+ * 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
+ * IFF file demuxer
+ * by Jaikrishnan Menon
+ * for more information on the .iff file format, visit:
+ * http://wiki.multimedia.cx/index.php?title=IFF
+ */
+
+#include "libavutil/avassert.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/dict.h"
+#include "libavcodec/bytestream.h"
+#include "avformat.h"
+#include "internal.h"
+
+#define ID_8SVX       MKTAG('8','S','V','X')
+#define ID_16SV       MKTAG('1','6','S','V')
+#define ID_MAUD       MKTAG('M','A','U','D')
+#define ID_MHDR       MKTAG('M','H','D','R')
+#define ID_MDAT       MKTAG('M','D','A','T')
+#define ID_VHDR       MKTAG('V','H','D','R')
+#define ID_ATAK       MKTAG('A','T','A','K')
+#define ID_RLSE       MKTAG('R','L','S','E')
+#define ID_CHAN       MKTAG('C','H','A','N')
+#define ID_PBM        MKTAG('P','B','M',' ')
+#define ID_ILBM       MKTAG('I','L','B','M')
+#define ID_BMHD       MKTAG('B','M','H','D')
+#define ID_DGBL       MKTAG('D','G','B','L')
+#define ID_CAMG       MKTAG('C','A','M','G')
+#define ID_CMAP       MKTAG('C','M','A','P')
+#define ID_ACBM       MKTAG('A','C','B','M')
+#define ID_DEEP       MKTAG('D','E','E','P')
+#define ID_RGB8       MKTAG('R','G','B','8')
+#define ID_RGBN       MKTAG('R','G','B','N')
+
+#define ID_FORM       MKTAG('F','O','R','M')
+#define ID_ANNO       MKTAG('A','N','N','O')
+#define ID_AUTH       MKTAG('A','U','T','H')
+#define ID_CHRS       MKTAG('C','H','R','S')
+#define ID_COPYRIGHT  MKTAG('(','c',')',' ')
+#define ID_CSET       MKTAG('C','S','E','T')
+#define ID_FVER       MKTAG('F','V','E','R')
+#define ID_NAME       MKTAG('N','A','M','E')
+#define ID_TEXT       MKTAG('T','E','X','T')
+#define ID_ABIT       MKTAG('A','B','I','T')
+#define ID_BODY       MKTAG('B','O','D','Y')
+#define ID_DBOD       MKTAG('D','B','O','D')
+#define ID_DPEL       MKTAG('D','P','E','L')
+#define ID_DLOC       MKTAG('D','L','O','C')
+#define ID_TVDC       MKTAG('T','V','D','C')
+
+#define LEFT    2
+#define RIGHT   4
+#define STEREO  6
+
+/**
+ * This number of bytes if added at the beginning of each AVPacket
+ * which contain additional information about video properties
+ * which has to be shared between demuxer and decoder.
+ * This number may change between frames, e.g. the demuxer might
+ * set it to smallest possible size of 2 to indicate that there's
+ * no extradata changing in this frame.
+ */
+#define IFF_EXTRA_VIDEO_SIZE 41
+
+typedef enum {
+    COMP_NONE,
+    COMP_FIB,
+    COMP_EXP
+} svx8_compression_type;
+
+typedef struct {
+    int64_t  body_pos;
+    int64_t  body_end;
+    uint32_t  body_size;
+    svx8_compression_type   svx8_compression;
+    unsigned  maud_bits;
+    unsigned  maud_compression;
+    unsigned  bitmap_compression;  ///< delta compression method used
+    unsigned  bpp;          ///< bits per plane to decode (differs from bits_per_coded_sample if HAM)
+    unsigned  ham;          ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise)
+    unsigned  flags;        ///< 1 for EHB, 0 is no extra half darkening
+    unsigned  transparency; ///< transparency color index in palette
+    unsigned  masking;      ///< masking method used
+    uint8_t   tvdc[32];     ///< TVDC lookup table
+} IffDemuxContext;
+
+/* Metadata string read */
+static int get_metadata(AVFormatContext *s,
+                        const char *const tag,
+                        const unsigned data_size)
+{
+    uint8_t *buf = ((data_size + 1) == 0) ? NULL : av_malloc(data_size + 1);
+
+    if (!buf)
+        return AVERROR(ENOMEM);
+
+    if (avio_read(s->pb, buf, data_size) < 0) {
+        av_free(buf);
+        return AVERROR(EIO);
+    }
+    buf[data_size] = 0;
+    av_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL);
+    return 0;
+}
+
+static int iff_probe(AVProbeData *p)
+{
+    const uint8_t *d = p->buf;
+
+    if (  AV_RL32(d)   == ID_FORM &&
+         (AV_RL32(d+8) == ID_8SVX ||
+          AV_RL32(d+8) == ID_16SV ||
+          AV_RL32(d+8) == ID_MAUD ||
+          AV_RL32(d+8) == ID_PBM  ||
+          AV_RL32(d+8) == ID_ACBM ||
+          AV_RL32(d+8) == ID_DEEP ||
+          AV_RL32(d+8) == ID_ILBM ||
+          AV_RL32(d+8) == ID_RGB8 ||
+          AV_RL32(d+8) == ID_RGBN) )
+        return AVPROBE_SCORE_MAX;
+    return 0;
+}
+
+static const uint8_t deep_rgb24[] = {0, 0, 0, 3, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
+static const uint8_t deep_rgba[]  = {0, 0, 0, 4, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
+static const uint8_t deep_bgra[]  = {0, 0, 0, 4, 0, 3, 0, 8, 0, 2, 0, 8, 0, 1, 0, 8};
+static const uint8_t deep_argb[]  = {0, 0, 0, 4, 0,17, 0, 8, 0, 1, 0, 8, 0, 2, 0, 8};
+static const uint8_t deep_abgr[]  = {0, 0, 0, 4, 0,17, 0, 8, 0, 3, 0, 8, 0, 2, 0, 8};
+
+static int iff_read_header(AVFormatContext *s)
+{
+    IffDemuxContext *iff = s->priv_data;
+    AVIOContext *pb = s->pb;
+    AVStream *st;
+    uint8_t *buf;
+    uint32_t chunk_id, data_size;
+    uint32_t screenmode = 0, num, den;
+    unsigned transparency = 0;
+    unsigned masking = 0; // no mask
+    uint8_t fmt[16];
+    int fmt_size;
+
+    st = avformat_new_stream(s, NULL);
+    if (!st)
+        return AVERROR(ENOMEM);
+
+    st->codec->channels = 1;
+    st->codec->channel_layout = AV_CH_LAYOUT_MONO;
+    avio_skip(pb, 8);
+    // codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content
+    st->codec->codec_tag = avio_rl32(pb);
+    iff->bitmap_compression = -1;
+    iff->svx8_compression = -1;
+    iff->maud_bits = -1;
+    iff->maud_compression = -1;
+
+    while(!url_feof(pb)) {
+        uint64_t orig_pos;
+        int res;
+        const char *metadata_tag = NULL;
+        chunk_id = avio_rl32(pb);
+        data_size = avio_rb32(pb);
+        orig_pos = avio_tell(pb);
+
+        switch(chunk_id) {
+        case ID_VHDR:
+            st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+
+            if (data_size < 14)
+                return AVERROR_INVALIDDATA;
+            avio_skip(pb, 12);
+            st->codec->sample_rate = avio_rb16(pb);
+            if (data_size >= 16) {
+                avio_skip(pb, 1);
+                iff->svx8_compression = avio_r8(pb);
+            }
+            break;
+
+        case ID_MHDR:
+            st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+
+            if (data_size < 32)
+                return AVERROR_INVALIDDATA;
+            avio_skip(pb, 4);
+            iff->maud_bits = avio_rb16(pb);
+            avio_skip(pb, 2);
+            num = avio_rb32(pb);
+            den = avio_rb16(pb);
+            if (!den)
+                return AVERROR_INVALIDDATA;
+            avio_skip(pb, 2);
+            st->codec->sample_rate = num / den;
+            st->codec->channels = avio_rb16(pb);
+            iff->maud_compression = avio_rb16(pb);
+            if (st->codec->channels == 1)
+                st->codec->channel_layout = AV_CH_LAYOUT_MONO;
+            else if (st->codec->channels == 2)
+                st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
+            break;
+
+        case ID_ABIT:
+        case ID_BODY:
+        case ID_DBOD:
+        case ID_MDAT:
+            iff->body_pos = avio_tell(pb);
+            iff->body_end = iff->body_pos + data_size;
+            iff->body_size = data_size;
+            break;
+
+        case ID_CHAN:
+            if (data_size < 4)
+                return AVERROR_INVALIDDATA;
+            if (avio_rb32(pb) < 6) {
+                st->codec->channels       = 1;
+                st->codec->channel_layout = AV_CH_LAYOUT_MONO;
+            } else {
+                st->codec->channels       = 2;
+                st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
+            }
+            break;
+
+        case ID_CAMG:
+            if (data_size < 4)
+                return AVERROR_INVALIDDATA;
+            screenmode                = avio_rb32(pb);
+            break;
+
+        case ID_CMAP:
+            if (data_size < 3 || data_size > 768 || data_size % 3) {
+                 av_log(s, AV_LOG_ERROR, "Invalid CMAP chunk size %d\n",
+                        data_size);
+                 return AVERROR_INVALIDDATA;
+            }
+            st->codec->extradata_size = data_size + IFF_EXTRA_VIDEO_SIZE;
+            st->codec->extradata      = av_malloc(data_size + IFF_EXTRA_VIDEO_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
+            if (!st->codec->extradata)
+                return AVERROR(ENOMEM);
+            if (avio_read(pb, st->codec->extradata + IFF_EXTRA_VIDEO_SIZE, data_size) < 0)
+                return AVERROR(EIO);
+            break;
+
+        case ID_BMHD:
+            st->codec->codec_type            = AVMEDIA_TYPE_VIDEO;
+            if (data_size <= 8)
+                return AVERROR_INVALIDDATA;
+            st->codec->width                 = avio_rb16(pb);
+            st->codec->height                = avio_rb16(pb);
+            avio_skip(pb, 4); // x, y offset
+            st->codec->bits_per_coded_sample = avio_r8(pb);
+            if (data_size >= 10)
+                masking                      = avio_r8(pb);
+            if (data_size >= 11)
+                iff->bitmap_compression      = avio_r8(pb);
+            if (data_size >= 14) {
+                avio_skip(pb, 1); // padding
+                transparency                 = avio_rb16(pb);
+            }
+            if (data_size >= 16) {
+                st->sample_aspect_ratio.num  = avio_r8(pb);
+                st->sample_aspect_ratio.den  = avio_r8(pb);
+            }
+            break;
+
+        case ID_DPEL:
+            if (data_size < 4 || (data_size & 3))
+                return AVERROR_INVALIDDATA;
+            if ((fmt_size = avio_read(pb, fmt, sizeof(fmt))) < 0)
+                return fmt_size;
+            if (fmt_size == sizeof(deep_rgb24) && !memcmp(fmt, deep_rgb24, sizeof(deep_rgb24)))
+                st->codec->pix_fmt = AV_PIX_FMT_RGB24;
+            else if (fmt_size == sizeof(deep_rgba) && !memcmp(fmt, deep_rgba, sizeof(deep_rgba)))
+                st->codec->pix_fmt = AV_PIX_FMT_RGBA;
+            else if (fmt_size == sizeof(deep_bgra) && !memcmp(fmt, deep_bgra, sizeof(deep_bgra)))
+                st->codec->pix_fmt = AV_PIX_FMT_BGRA;
+            else if (fmt_size == sizeof(deep_argb) && !memcmp(fmt, deep_argb, sizeof(deep_argb)))
+                st->codec->pix_fmt = AV_PIX_FMT_ARGB;
+            else if (fmt_size == sizeof(deep_abgr) && !memcmp(fmt, deep_abgr, sizeof(deep_abgr)))
+                st->codec->pix_fmt = AV_PIX_FMT_ABGR;
+            else {
+                avpriv_request_sample(s, "color format %.16s", fmt);
+                return AVERROR_PATCHWELCOME;
+            }
+            break;
+
+        case ID_DGBL:
+            st->codec->codec_type            = AVMEDIA_TYPE_VIDEO;
+            if (data_size < 8)
+                return AVERROR_INVALIDDATA;
+            st->codec->width                 = avio_rb16(pb);
+            st->codec->height                = avio_rb16(pb);
+            iff->bitmap_compression          = avio_rb16(pb);
+            st->sample_aspect_ratio.num      = avio_r8(pb);
+            st->sample_aspect_ratio.den      = avio_r8(pb);
+            st->codec->bits_per_coded_sample = 24;
+            break;
+
+        case ID_DLOC:
+            if (data_size < 4)
+                return AVERROR_INVALIDDATA;
+            st->codec->width  = avio_rb16(pb);
+            st->codec->height = avio_rb16(pb);
+            break;
+
+        case ID_TVDC:
+            if (data_size < sizeof(iff->tvdc))
+                return AVERROR_INVALIDDATA;
+            res = avio_read(pb, iff->tvdc, sizeof(iff->tvdc));
+            if (res < 0)
+                return res;
+            break;
+
+        case ID_ANNO:
+        case ID_TEXT:      metadata_tag = "comment";   break;
+        case ID_AUTH:      metadata_tag = "artist";    break;
+        case ID_COPYRIGHT: metadata_tag = "copyright"; break;
+        case ID_NAME:      metadata_tag = "title";     break;
+        }
+
+        if (metadata_tag) {
+            if ((res = get_metadata(s, metadata_tag, data_size)) < 0) {
+                av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag);
+                return res;
+            }
+        }
+        avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1));
+    }
+
+    avio_seek(pb, iff->body_pos, SEEK_SET);
+
+    switch(st->codec->codec_type) {
+    case AVMEDIA_TYPE_AUDIO:
+        avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate);
+
+        if (st->codec->codec_tag == ID_16SV)
+            st->codec->codec_id = AV_CODEC_ID_PCM_S16BE_PLANAR;
+        else if (st->codec->codec_tag == ID_MAUD) {
+            if (iff->maud_bits == 8 && !iff->maud_compression) {
+                st->codec->codec_id = AV_CODEC_ID_PCM_U8;
+            } else if (iff->maud_bits == 16 && !iff->maud_compression) {
+                st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
+            } else if (iff->maud_bits ==  8 && iff->maud_compression == 2) {
+                st->codec->codec_id = AV_CODEC_ID_PCM_ALAW;
+            } else if (iff->maud_bits ==  8 && iff->maud_compression == 3) {
+                st->codec->codec_id = AV_CODEC_ID_PCM_MULAW;
+            } else {
+                avpriv_request_sample(s, "compression %d and bit depth %d", iff->maud_compression, iff->maud_bits);
+                return AVERROR_PATCHWELCOME;
+            }
+
+            st->codec->bits_per_coded_sample =
+                av_get_bits_per_sample(st->codec->codec_id);
+
+            st->codec->block_align =
+                st->codec->bits_per_coded_sample * st->codec->channels / 8;
+        } else {
+        switch (iff->svx8_compression) {
+        case COMP_NONE:
+            st->codec->codec_id = AV_CODEC_ID_PCM_S8_PLANAR;
+            break;
+        case COMP_FIB:
+            st->codec->codec_id = AV_CODEC_ID_8SVX_FIB;
+            break;
+        case COMP_EXP:
+            st->codec->codec_id = AV_CODEC_ID_8SVX_EXP;
+            break;
+        default:
+            av_log(s, AV_LOG_ERROR,
+                   "Unknown SVX8 compression method '%d'\n", iff->svx8_compression);
+            return -1;
+        }
+        }
+
+        st->codec->bits_per_coded_sample = av_get_bits_per_sample(st->codec->codec_id);
+        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;
+        break;
+
+    case AVMEDIA_TYPE_VIDEO:
+        iff->bpp          = st->codec->bits_per_coded_sample;
+        if ((screenmode & 0x800 /* Hold And Modify */) && iff->bpp <= 8) {
+            iff->ham      = iff->bpp > 6 ? 6 : 4;
+            st->codec->bits_per_coded_sample = 24;
+        }
+        iff->flags        = (screenmode & 0x80 /* Extra HalfBrite */) && iff->bpp <= 8;
+        iff->masking      = masking;
+        iff->transparency = transparency;
+
+        if (!st->codec->extradata) {
+            st->codec->extradata_size = IFF_EXTRA_VIDEO_SIZE;
+            st->codec->extradata      = av_malloc(IFF_EXTRA_VIDEO_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
+            if (!st->codec->extradata)
+                return AVERROR(ENOMEM);
+        }
+        av_assert0(st->codec->extradata_size >= IFF_EXTRA_VIDEO_SIZE);
+        buf = st->codec->extradata;
+        bytestream_put_be16(&buf, IFF_EXTRA_VIDEO_SIZE);
+        bytestream_put_byte(&buf, iff->bitmap_compression);
+        bytestream_put_byte(&buf, iff->bpp);
+        bytestream_put_byte(&buf, iff->ham);
+        bytestream_put_byte(&buf, iff->flags);
+        bytestream_put_be16(&buf, iff->transparency);
+        bytestream_put_byte(&buf, iff->masking);
+        bytestream_put_buffer(&buf, iff->tvdc, sizeof(iff->tvdc));
+        st->codec->codec_id = AV_CODEC_ID_IFF_ILBM;
+        break;
+    default:
+        return -1;
+    }
+
+    return 0;
+}
+
+static int iff_read_packet(AVFormatContext *s,
+                           AVPacket *pkt)
+{
+    IffDemuxContext *iff = s->priv_data;
+    AVIOContext *pb = s->pb;
+    AVStream *st = s->streams[0];
+    int ret;
+    int64_t pos = avio_tell(pb);
+
+    if (pos >= iff->body_end)
+        return AVERROR_EOF;
+
+    if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
+        if (st->codec->codec_tag == ID_MAUD) {
+            ret = av_get_packet(pb, pkt, FFMIN(iff->body_end - pos, 1024 * st->codec->block_align));
+        } else {
+            ret = av_get_packet(pb, pkt, iff->body_size);
+        }
+    } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+        uint8_t *buf;
+
+        if (av_new_packet(pkt, iff->body_size + 2) < 0) {
+            return AVERROR(ENOMEM);
+        }
+
+        buf = pkt->data;
+        bytestream_put_be16(&buf, 2);
+        ret = avio_read(pb, buf, iff->body_size);
+    } else {
+        av_assert0(0);
+    }
+
+    if (pos == iff->body_pos)
+        pkt->flags |= AV_PKT_FLAG_KEY;
+    if (ret < 0)
+        return ret;
+    pkt->stream_index = 0;
+    return ret;
+}
+
+AVInputFormat ff_iff_demuxer = {
+    .name           = "iff",
+    .long_name      = NULL_IF_CONFIG_SMALL("IFF (Interchange File Format)"),
+    .priv_data_size = sizeof(IffDemuxContext),
+    .read_probe     = iff_probe,
+    .read_header    = iff_read_header,
+    .read_packet    = iff_read_packet,
+    .flags          = AVFMT_GENERIC_INDEX,
+};