making act segmenter

1 files changed, 546 insertions, 0 deletions

diff --git a/ffmpeg/libavcodec/tiffenc.c b/ffmpeg/libavcodec/tiffenc.c
new file mode 100644
index 0000000..61294b9
--- /dev/null
+++ b/ffmpeg/libavcodec/tiffenc.c
@@ -0,0 +1,546 @@
+/*
+ * TIFF image encoder
+ * Copyright (c) 2007 Bartlomiej Wolowiec
+ *
+ * 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
+ * TIFF image encoder
+ * @author Bartlomiej Wolowiec
+ */
+
+#include "libavutil/imgutils.h"
+#include "libavutil/log.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+
+#include "avcodec.h"
+#include "config.h"
+#if CONFIG_ZLIB
+#include <zlib.h>
+#endif
+#include "bytestream.h"
+#include "internal.h"
+#include "tiff.h"
+#include "rle.h"
+#include "lzw.h"
+#include "put_bits.h"
+
+#define TIFF_MAX_ENTRY 32
+
+/** sizes of various TIFF field types (string size = 1)*/
+static const uint8_t type_sizes2[14] = {
+    0, 1, 1, 2, 4, 8, 1, 1, 2, 4, 8, 4, 8, 4
+};
+
+typedef struct TiffEncoderContext {
+    AVClass *class;                     ///< for private options
+    AVCodecContext *avctx;
+    AVFrame picture;
+
+    int width;                          ///< picture width
+    int height;                         ///< picture height
+    unsigned int bpp;                   ///< bits per pixel
+    int compr;                          ///< compression level
+    int bpp_tab_size;                   ///< bpp_tab size
+    int photometric_interpretation;     ///< photometric interpretation
+    int strips;                         ///< number of strips
+    uint32_t *strip_sizes;
+    unsigned int strip_sizes_size;
+    uint32_t *strip_offsets;
+    unsigned int strip_offsets_size;
+    uint8_t *yuv_line;
+    unsigned int yuv_line_size;
+    int rps;                            ///< row per strip
+    uint8_t entries[TIFF_MAX_ENTRY*12]; ///< entires in header
+    int num_entries;                    ///< number of entires
+    uint8_t **buf;                      ///< actual position in buffer
+    uint8_t *buf_start;                 ///< pointer to first byte in buffer
+    int buf_size;                       ///< buffer size
+    uint16_t subsampling[2];            ///< YUV subsampling factors
+    struct LZWEncodeState *lzws;        ///< LZW Encode state
+    uint32_t dpi;                       ///< image resolution in DPI
+} TiffEncoderContext;
+
+
+/**
+ * Check free space in buffer.
+ *
+ * @param s Tiff context
+ * @param need Needed bytes
+ * @return 0 - ok, 1 - no free space
+ */
+static inline int check_size(TiffEncoderContext * s, uint64_t need)
+{
+    if (s->buf_size < *s->buf - s->buf_start + need) {
+        *s->buf = s->buf_start + s->buf_size + 1;
+        av_log(s->avctx, AV_LOG_ERROR, "Buffer is too small\n");
+        return 1;
+    }
+    return 0;
+}
+
+/**
+ * Put n values to buffer.
+ *
+ * @param p pointer to pointer to output buffer
+ * @param n number of values
+ * @param val pointer to values
+ * @param type type of values
+ * @param flip = 0 - normal copy, >0 - flip
+ */
+static void tnput(uint8_t ** p, int n, const uint8_t * val, enum TiffTypes type,
+                  int flip)
+{
+    int i;
+#if HAVE_BIGENDIAN
+    flip ^= ((int[]) {0, 0, 0, 1, 3, 3})[type];
+#endif
+    for (i = 0; i < n * type_sizes2[type]; i++)
+        *(*p)++ = val[i ^ flip];
+}
+
+/**
+ * Add entry to directory in tiff header.
+ *
+ * @param s Tiff context
+ * @param tag tag that identifies the entry
+ * @param type entry type
+ * @param count the number of values
+ * @param ptr_val pointer to values
+ */
+static void add_entry(TiffEncoderContext * s,
+                      enum TiffTags tag, enum TiffTypes type, int count,
+                      const void *ptr_val)
+{
+    uint8_t *entries_ptr = s->entries + 12 * s->num_entries;
+
+    av_assert0(s->num_entries < TIFF_MAX_ENTRY);
+
+    bytestream_put_le16(&entries_ptr, tag);
+    bytestream_put_le16(&entries_ptr, type);
+    bytestream_put_le32(&entries_ptr, count);
+
+    if (type_sizes[type] * (int64_t)count <= 4) {
+        tnput(&entries_ptr, count, ptr_val, type, 0);
+    } else {
+        bytestream_put_le32(&entries_ptr, *s->buf - s->buf_start);
+        check_size(s, count * (int64_t)type_sizes2[type]);
+        tnput(s->buf, count, ptr_val, type, 0);
+    }
+
+    s->num_entries++;
+}
+
+static void add_entry1(TiffEncoderContext * s,
+                       enum TiffTags tag, enum TiffTypes type, int val){
+    uint16_t w = val;
+    uint32_t dw= val;
+    add_entry(s, tag, type, 1, type == TIFF_SHORT ? (void *)&w : (void *)&dw);
+}
+
+/**
+ * Encode one strip in tiff file.
+ *
+ * @param s Tiff context
+ * @param src input buffer
+ * @param dst output buffer
+ * @param n size of input buffer
+ * @param compr compression method
+ * @return number of output bytes. If an output error is encountered, -1 is returned
+ */
+static int encode_strip(TiffEncoderContext * s, const int8_t * src,
+                        uint8_t * dst, int n, int compr)
+{
+
+    switch (compr) {
+#if CONFIG_ZLIB
+    case TIFF_DEFLATE:
+    case TIFF_ADOBE_DEFLATE:
+        {
+            unsigned long zlen = s->buf_size - (*s->buf - s->buf_start);
+            if (compress(dst, &zlen, src, n) != Z_OK) {
+                av_log(s->avctx, AV_LOG_ERROR, "Compressing failed\n");
+                return -1;
+            }
+            return zlen;
+        }
+#endif
+    case TIFF_RAW:
+        if (check_size(s, n))
+            return -1;
+        memcpy(dst, src, n);
+        return n;
+    case TIFF_PACKBITS:
+        return ff_rle_encode(dst, s->buf_size - (*s->buf - s->buf_start), src, 1, n, 2, 0xff, -1, 0);
+    case TIFF_LZW:
+        return ff_lzw_encode(s->lzws, src, n);
+    default:
+        return -1;
+    }
+}
+
+static void pack_yuv(TiffEncoderContext * s, uint8_t * dst, int lnum)
+{
+    AVFrame *p = &s->picture;
+    int i, j, k;
+    int w = (s->width - 1) / s->subsampling[0] + 1;
+    uint8_t *pu = &p->data[1][lnum / s->subsampling[1] * p->linesize[1]];
+    uint8_t *pv = &p->data[2][lnum / s->subsampling[1] * p->linesize[2]];
+    if(s->width % s->subsampling[0] || s->height % s->subsampling[1]){
+        for (i = 0; i < w; i++){
+            for (j = 0; j < s->subsampling[1]; j++)
+                for (k = 0; k < s->subsampling[0]; k++)
+                    *dst++ = p->data[0][FFMIN(lnum + j, s->height-1) * p->linesize[0] +
+                                        FFMIN(i * s->subsampling[0] + k, s->width-1)];
+            *dst++ = *pu++;
+            *dst++ = *pv++;
+        }
+    }else{
+        for (i = 0; i < w; i++){
+            for (j = 0; j < s->subsampling[1]; j++)
+                for (k = 0; k < s->subsampling[0]; k++)
+                    *dst++ = p->data[0][(lnum + j) * p->linesize[0] +
+                                        i * s->subsampling[0] + k];
+            *dst++ = *pu++;
+            *dst++ = *pv++;
+        }
+    }
+}
+
+static av_cold int encode_init(AVCodecContext *avctx)
+{
+    TiffEncoderContext *s = avctx->priv_data;
+
+    avctx->coded_frame= &s->picture;
+    avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
+    avctx->coded_frame->key_frame = 1;
+    s->avctx = avctx;
+
+    return 0;
+}
+
+static int encode_frame(AVCodecContext * avctx, AVPacket *pkt,
+                        const AVFrame *pict, int *got_packet)
+{
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
+    TiffEncoderContext *s = avctx->priv_data;
+    AVFrame *const p = &s->picture;
+    int i;
+    uint8_t *ptr;
+    uint8_t *offset;
+    uint32_t strips;
+    int bytes_per_row;
+    uint32_t res[2] = { s->dpi, 1 };        // image resolution (72/1)
+    uint16_t bpp_tab[4];
+    int ret = -1;
+    int is_yuv = 0, alpha = 0;
+    int shift_h, shift_v;
+
+    *p = *pict;
+
+    s->width = avctx->width;
+    s->height = avctx->height;
+    s->subsampling[0] = 1;
+    s->subsampling[1] = 1;
+
+    avctx->bits_per_coded_sample =
+    s->bpp = av_get_bits_per_pixel(desc);
+    s->bpp_tab_size = desc->nb_components;
+
+    switch (avctx->pix_fmt) {
+    case AV_PIX_FMT_RGBA64LE:
+    case AV_PIX_FMT_RGBA:
+        alpha = 1;
+    case AV_PIX_FMT_RGB48LE:
+    case AV_PIX_FMT_RGB24:
+        s->photometric_interpretation = 2;
+        break;
+    case AV_PIX_FMT_GRAY8:
+        avctx->bits_per_coded_sample = 0x28;
+    case AV_PIX_FMT_GRAY8A:
+        alpha = avctx->pix_fmt == AV_PIX_FMT_GRAY8A;
+    case AV_PIX_FMT_GRAY16LE:
+    case AV_PIX_FMT_MONOBLACK:
+        s->photometric_interpretation = 1;
+        break;
+    case AV_PIX_FMT_PAL8:
+        s->photometric_interpretation = 3;
+        break;
+    case AV_PIX_FMT_MONOWHITE:
+        s->photometric_interpretation = 0;
+        break;
+    case AV_PIX_FMT_YUV420P:
+    case AV_PIX_FMT_YUV422P:
+    case AV_PIX_FMT_YUV440P:
+    case AV_PIX_FMT_YUV444P:
+    case AV_PIX_FMT_YUV410P:
+    case AV_PIX_FMT_YUV411P:
+        s->photometric_interpretation = 6;
+        avcodec_get_chroma_sub_sample(avctx->pix_fmt, &shift_h, &shift_v);
+        s->subsampling[0] = 1 << shift_h;
+        s->subsampling[1] = 1 << shift_v;
+        is_yuv = 1;
+        break;
+    default:
+        av_log(s->avctx, AV_LOG_ERROR,
+               "This colors format is not supported\n");
+        return -1;
+    }
+
+    for (i = 0; i < s->bpp_tab_size; i++)
+        bpp_tab[i] = desc->comp[i].depth_minus1 + 1;
+
+    if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE || s->compr == TIFF_LZW)
+        //best choose for DEFLATE
+        s->rps = s->height;
+    else
+        s->rps = FFMAX(8192 / (((s->width * s->bpp) >> 3) + 1), 1);     // suggest size of strip
+    s->rps = ((s->rps - 1) / s->subsampling[1] + 1) * s->subsampling[1]; // round rps up
+
+    strips = (s->height - 1) / s->rps + 1;
+
+    if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width * avctx->height * s->bpp * 2 +
+                                  avctx->height * 4 + FF_MIN_BUFFER_SIZE)) < 0)
+        return ret;
+    ptr          = pkt->data;
+    s->buf_start = pkt->data;
+    s->buf       = &ptr;
+    s->buf_size  = pkt->size;
+
+    if (check_size(s, 8))
+        goto fail;
+
+    // write header
+    bytestream_put_le16(&ptr, 0x4949);
+    bytestream_put_le16(&ptr, 42);
+
+    offset = ptr;
+    bytestream_put_le32(&ptr, 0);
+
+    av_fast_padded_mallocz(&s->strip_sizes, &s->strip_sizes_size, sizeof(s->strip_sizes[0]) * strips);
+    av_fast_padded_mallocz(&s->strip_offsets, &s->strip_offsets_size, sizeof(s->strip_offsets[0]) * strips);
+
+    if (!s->strip_sizes || !s->strip_offsets) {
+        ret = AVERROR(ENOMEM);
+        goto fail;
+    }
+
+    bytes_per_row = (((s->width - 1)/s->subsampling[0] + 1) * s->bpp
+                    * s->subsampling[0] * s->subsampling[1] + 7) >> 3;
+    if (is_yuv){
+        av_fast_padded_malloc(&s->yuv_line, &s->yuv_line_size, bytes_per_row);
+        if (s->yuv_line == NULL){
+            av_log(s->avctx, AV_LOG_ERROR, "Not enough memory\n");
+            ret = AVERROR(ENOMEM);
+            goto fail;
+        }
+    }
+
+#if CONFIG_ZLIB
+    if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
+        uint8_t *zbuf;
+        int zlen, zn;
+        int j;
+
+        zlen = bytes_per_row * s->rps;
+        zbuf = av_malloc(zlen);
+        if (!zbuf) {
+            ret = AVERROR(ENOMEM);
+            goto fail;
+        }
+        s->strip_offsets[0] = ptr - pkt->data;
+        zn = 0;
+        for (j = 0; j < s->rps; j++) {
+            if (is_yuv){
+                pack_yuv(s, s->yuv_line, j);
+                memcpy(zbuf + zn, s->yuv_line, bytes_per_row);
+                j += s->subsampling[1] - 1;
+            }
+            else
+                memcpy(zbuf + j * bytes_per_row,
+                       p->data[0] + j * p->linesize[0], bytes_per_row);
+            zn += bytes_per_row;
+        }
+        ret = encode_strip(s, zbuf, ptr, zn, s->compr);
+        av_free(zbuf);
+        if (ret < 0) {
+            av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
+            goto fail;
+        }
+        ptr += ret;
+        s->strip_sizes[0] = ptr - pkt->data - s->strip_offsets[0];
+    } else
+#endif
+    {
+        if (s->compr == TIFF_LZW) {
+            s->lzws = av_malloc(ff_lzw_encode_state_size);
+            if (!s->lzws) {
+                ret = AVERROR(ENOMEM);
+                goto fail;
+            }
+        }
+        for (i = 0; i < s->height; i++) {
+            if (s->strip_sizes[i / s->rps] == 0) {
+                if(s->compr == TIFF_LZW){
+                    ff_lzw_encode_init(s->lzws, ptr, s->buf_size - (*s->buf - s->buf_start),
+                                       12, FF_LZW_TIFF, put_bits);
+                }
+                s->strip_offsets[i / s->rps] = ptr - pkt->data;
+            }
+            if (is_yuv){
+                 pack_yuv(s, s->yuv_line, i);
+                 ret = encode_strip(s, s->yuv_line, ptr, bytes_per_row, s->compr);
+                 i += s->subsampling[1] - 1;
+            }
+            else
+                ret = encode_strip(s, p->data[0] + i * p->linesize[0],
+                        ptr, bytes_per_row, s->compr);
+            if (ret < 0) {
+                av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
+                goto fail;
+            }
+            s->strip_sizes[i / s->rps] += ret;
+            ptr += ret;
+            if(s->compr == TIFF_LZW && (i==s->height-1 || i%s->rps == s->rps-1)){
+                ret = ff_lzw_encode_flush(s->lzws, flush_put_bits);
+                s->strip_sizes[(i / s->rps )] += ret ;
+                ptr += ret;
+            }
+        }
+        if(s->compr == TIFF_LZW)
+            av_free(s->lzws);
+    }
+
+    s->num_entries = 0;
+
+    add_entry1(s,TIFF_SUBFILE,           TIFF_LONG,             0);
+    add_entry1(s,TIFF_WIDTH,             TIFF_LONG,             s->width);
+    add_entry1(s,TIFF_HEIGHT,            TIFF_LONG,             s->height);
+
+    if (s->bpp_tab_size)
+    add_entry(s, TIFF_BPP,               TIFF_SHORT,    s->bpp_tab_size, bpp_tab);
+
+    add_entry1(s,TIFF_COMPR,             TIFF_SHORT,            s->compr);
+    add_entry1(s,TIFF_INVERT,            TIFF_SHORT,            s->photometric_interpretation);
+    add_entry(s, TIFF_STRIP_OFFS,        TIFF_LONG,     strips, s->strip_offsets);
+
+    if (s->bpp_tab_size)
+    add_entry1(s,TIFF_SAMPLES_PER_PIXEL, TIFF_SHORT,            s->bpp_tab_size);
+
+    add_entry1(s,TIFF_ROWSPERSTRIP,      TIFF_LONG,             s->rps);
+    add_entry(s, TIFF_STRIP_SIZE,        TIFF_LONG,     strips, s->strip_sizes);
+    add_entry(s, TIFF_XRES,              TIFF_RATIONAL, 1,      res);
+    add_entry(s, TIFF_YRES,              TIFF_RATIONAL, 1,      res);
+    add_entry1(s,TIFF_RES_UNIT,          TIFF_SHORT,            2);
+
+    if(!(avctx->flags & CODEC_FLAG_BITEXACT))
+    add_entry(s, TIFF_SOFTWARE_NAME,     TIFF_STRING,
+              strlen(LIBAVCODEC_IDENT) + 1, LIBAVCODEC_IDENT);
+
+    if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
+        uint16_t pal[256 * 3];
+        for (i = 0; i < 256; i++) {
+            uint32_t rgb = *(uint32_t *) (p->data[1] + i * 4);
+            pal[i]       = ((rgb >> 16) & 0xff) * 257;
+            pal[i + 256] = ((rgb >> 8 ) & 0xff) * 257;
+            pal[i + 512] = ( rgb        & 0xff) * 257;
+        }
+        add_entry(s, TIFF_PAL, TIFF_SHORT, 256 * 3, pal);
+    }
+    if (alpha)
+        add_entry1(s,TIFF_EXTRASAMPLES,      TIFF_SHORT,            2);
+    if (is_yuv){
+        /** according to CCIR Recommendation 601.1 */
+        uint32_t refbw[12] = {15, 1, 235, 1, 128, 1, 240, 1, 128, 1, 240, 1};
+        add_entry(s, TIFF_YCBCR_SUBSAMPLING, TIFF_SHORT,    2, s->subsampling);
+        if (avctx->chroma_sample_location == AVCHROMA_LOC_TOPLEFT)
+            add_entry1(s, TIFF_YCBCR_POSITIONING, TIFF_SHORT, 2);
+        add_entry(s, TIFF_REFERENCE_BW,      TIFF_RATIONAL, 6, refbw);
+    }
+    bytestream_put_le32(&offset, ptr - pkt->data);    // write offset to dir
+
+    if (check_size(s, 6 + s->num_entries * 12)) {
+        ret = AVERROR(EINVAL);
+        goto fail;
+    }
+    bytestream_put_le16(&ptr, s->num_entries);  // write tag count
+    bytestream_put_buffer(&ptr, s->entries, s->num_entries * 12);
+    bytestream_put_le32(&ptr, 0);
+
+    pkt->size   = ptr - pkt->data;
+    pkt->flags |= AV_PKT_FLAG_KEY;
+    *got_packet = 1;
+
+fail:
+    return ret < 0 ? ret : 0;
+}
+
+static av_cold int encode_close(AVCodecContext *avctx)
+{
+    TiffEncoderContext *s = avctx->priv_data;
+
+    av_freep(&s->strip_sizes);
+    av_freep(&s->strip_offsets);
+    av_freep(&s->yuv_line);
+
+    return 0;
+}
+
+#define OFFSET(x) offsetof(TiffEncoderContext, x)
+#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+    {"dpi", "set the image resolution (in dpi)", OFFSET(dpi), AV_OPT_TYPE_INT, {.i64 = 72}, 1, 0x10000, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_ENCODING_PARAM},
+    { "compression_algo", NULL, OFFSET(compr), AV_OPT_TYPE_INT, {.i64 = TIFF_PACKBITS}, TIFF_RAW, TIFF_DEFLATE, VE, "compression_algo" },
+    { "packbits", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = TIFF_PACKBITS}, 0, 0, VE, "compression_algo" },
+    { "raw",      NULL, 0, AV_OPT_TYPE_CONST, {.i64 = TIFF_RAW},      0, 0, VE, "compression_algo" },
+    { "lzw",      NULL, 0, AV_OPT_TYPE_CONST, {.i64 = TIFF_LZW},      0, 0, VE, "compression_algo" },
+#if CONFIG_ZLIB
+    { "deflate",  NULL, 0, AV_OPT_TYPE_CONST, {.i64 = TIFF_DEFLATE},  0, 0, VE, "compression_algo" },
+#endif
+    { NULL },
+};
+
+static const AVClass tiffenc_class = {
+    .class_name = "TIFF encoder",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+AVCodec ff_tiff_encoder = {
+    .name           = "tiff",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_TIFF,
+    .priv_data_size = sizeof(TiffEncoderContext),
+    .init           = encode_init,
+    .encode2        = encode_frame,
+    .close          = encode_close,
+    .pix_fmts       = (const enum AVPixelFormat[]) {
+        AV_PIX_FMT_RGB24, AV_PIX_FMT_PAL8, AV_PIX_FMT_GRAY8,
+        AV_PIX_FMT_GRAY8A, AV_PIX_FMT_GRAY16LE,
+        AV_PIX_FMT_MONOBLACK, AV_PIX_FMT_MONOWHITE,
+        AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
+        AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_RGB48LE,
+        AV_PIX_FMT_RGBA, AV_PIX_FMT_RGBA64LE,
+        AV_PIX_FMT_NONE
+    },
+    .long_name      = NULL_IF_CONFIG_SMALL("TIFF image"),
+    .priv_class     = &tiffenc_class,
+};