chasing indexing error

1 files changed, 0 insertions, 321 deletions

diff --git a/ffmpeg/libavcodec/gif.c b/ffmpeg/libavcodec/gif.c
deleted file mode 100644
index 27d054e..0000000
--- a/ffmpeg/libavcodec/gif.c
+++ /dev/null
@@ -1,321 +0,0 @@
-/*
- * Copyright (c) 2000 Fabrice Bellard
- * Copyright (c) 2002 Francois Revol
- * Copyright (c) 2006 Baptiste Coudurier
- *
- * first version by Francois Revol <revol@free.fr>
- *
- * 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
- * GIF encoder
- * @see http://www.w3.org/Graphics/GIF/spec-gif89a.txt
- */
-
-#define BITSTREAM_WRITER_LE
-#include "libavutil/opt.h"
-#include "libavutil/imgutils.h"
-#include "avcodec.h"
-#include "bytestream.h"
-#include "internal.h"
-#include "lzw.h"
-#include "gif.h"
-
-#include "put_bits.h"
-
-typedef struct {
-    const AVClass *class;
-    LZWState *lzw;
-    uint8_t *buf;
-    AVFrame *last_frame;
-    int flags;
-    uint32_t palette[AVPALETTE_COUNT];  ///< local reference palette for !pal8
-    uint8_t *tmpl;                      ///< temporary line buffer
-} GIFContext;
-
-enum {
-    GF_OFFSETTING = 1<<0,
-    GF_TRANSDIFF  = 1<<1,
-};
-
-static int pick_palette_entry(const uint8_t *buf, int linesize, int w, int h)
-{
-    int histogram[AVPALETTE_COUNT] = {0};
-    int x, y, i;
-
-    for (y = 0; y < h; y++) {
-        for (x = 0; x < w; x++)
-            histogram[buf[x]]++;
-        buf += linesize;
-    }
-    for (i = 0; i < FF_ARRAY_ELEMS(histogram); i++)
-        if (!histogram[i])
-            return i;
-    return -1;
-}
-
-static int gif_image_write_image(AVCodecContext *avctx,
-                                 uint8_t **bytestream, uint8_t *end,
-                                 const uint32_t *palette,
-                                 const uint8_t *buf, const int linesize,
-                                 AVPacket *pkt)
-{
-    GIFContext *s = avctx->priv_data;
-    int len = 0, height = avctx->height, width = avctx->width, x, y;
-    int x_start = 0, y_start = 0, trans = -1;
-    const uint8_t *ptr;
-
-    /* Crop image */
-    // TODO support with palette change
-    if ((s->flags & GF_OFFSETTING) && s->last_frame && !palette) {
-        const uint8_t *ref = s->last_frame->data[0];
-        const int ref_linesize = s->last_frame->linesize[0];
-        int x_end = avctx->width  - 1,
-            y_end = avctx->height - 1;
-
-        /* skip common lines */
-        while (y_start < y_end) {
-            if (memcmp(ref + y_start*ref_linesize, buf + y_start*linesize, width))
-                break;
-            y_start++;
-        }
-        while (y_end > y_start) {
-            if (memcmp(ref + y_end*ref_linesize, buf + y_end*linesize, width))
-                break;
-            y_end--;
-        }
-        height = y_end + 1 - y_start;
-
-        /* skip common columns */
-        while (x_start < x_end) {
-            int same_column = 1;
-            for (y = y_start; y < y_end; y++) {
-                if (ref[y*ref_linesize + x_start] != buf[y*linesize + x_start]) {
-                    same_column = 0;
-                    break;
-                }
-            }
-            if (!same_column)
-                break;
-            x_start++;
-        }
-        while (x_end > x_start) {
-            int same_column = 1;
-            for (y = y_start; y < y_end; y++) {
-                if (ref[y*ref_linesize + x_end] != buf[y*linesize + x_end]) {
-                    same_column = 0;
-                    break;
-                }
-            }
-            if (!same_column)
-                break;
-            x_end--;
-        }
-        width = x_end + 1 - x_start;
-
-        av_log(avctx, AV_LOG_DEBUG,"%dx%d image at pos (%d;%d) [area:%dx%d]\n",
-               width, height, x_start, y_start, avctx->width, avctx->height);
-    }
-
-    /* image block */
-    bytestream_put_byte(bytestream, GIF_IMAGE_SEPARATOR);
-    bytestream_put_le16(bytestream, x_start);
-    bytestream_put_le16(bytestream, y_start);
-    bytestream_put_le16(bytestream, width);
-    bytestream_put_le16(bytestream, height);
-
-    if (!palette) {
-        bytestream_put_byte(bytestream, 0x00); /* flags */
-    } else {
-        unsigned i;
-        bytestream_put_byte(bytestream, 1<<7 | 0x7); /* flags */
-        for (i = 0; i < AVPALETTE_COUNT; i++) {
-            const uint32_t v = palette[i];
-            bytestream_put_be24(bytestream, v);
-        }
-    }
-
-    /* TODO: support with palette change (pal8) */
-    if ((s->flags & GF_TRANSDIFF) && s->last_frame && !palette) {
-        trans = pick_palette_entry(buf + y_start*linesize + x_start,
-                                   linesize, width, height);
-        if (trans < 0) { // TODO, patch welcome
-            av_log(avctx, AV_LOG_DEBUG, "No available color, can not use transparency\n");
-        } else {
-            uint8_t *pal_exdata = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
-            if (!pal_exdata)
-                return AVERROR(ENOMEM);
-            memcpy(pal_exdata, s->palette, AVPALETTE_SIZE);
-            pal_exdata[trans*4 + 3*!HAVE_BIGENDIAN] = 0x00;
-        }
-    }
-
-    bytestream_put_byte(bytestream, 0x08);
-
-    ff_lzw_encode_init(s->lzw, s->buf, 2 * width * height,
-                       12, FF_LZW_GIF, put_bits);
-
-    ptr = buf + y_start*linesize + x_start;
-    if (trans >= 0) {
-        const int ref_linesize = s->last_frame->linesize[0];
-        const uint8_t *ref = s->last_frame->data[0] + y_start*ref_linesize + x_start;
-
-        for (y = 0; y < height; y++) {
-            memcpy(s->tmpl, ptr, width);
-            for (x = 0; x < width; x++)
-                if (ref[x] == ptr[x])
-                    s->tmpl[x] = trans;
-            len += ff_lzw_encode(s->lzw, s->tmpl, width);
-            ptr += linesize;
-            ref += ref_linesize;
-        }
-    } else {
-        for (y = 0; y < height; y++) {
-            len += ff_lzw_encode(s->lzw, ptr, width);
-            ptr += linesize;
-        }
-    }
-    len += ff_lzw_encode_flush(s->lzw, flush_put_bits);
-
-    ptr = s->buf;
-    while (len > 0) {
-        int size = FFMIN(255, len);
-        bytestream_put_byte(bytestream, size);
-        if (end - *bytestream < size)
-            return -1;
-        bytestream_put_buffer(bytestream, ptr, size);
-        ptr += size;
-        len -= size;
-    }
-    bytestream_put_byte(bytestream, 0x00); /* end of image block */
-    return 0;
-}
-
-static av_cold int gif_encode_init(AVCodecContext *avctx)
-{
-    GIFContext *s = avctx->priv_data;
-
-    if (avctx->width > 65535 || avctx->height > 65535) {
-        av_log(avctx, AV_LOG_ERROR, "GIF does not support resolutions above 65535x65535\n");
-        return AVERROR(EINVAL);
-    }
-
-    avctx->coded_frame = av_frame_alloc();
-    if (!avctx->coded_frame)
-        return AVERROR(ENOMEM);
-
-    avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
-    avctx->coded_frame->key_frame = 1;
-
-    s->lzw = av_mallocz(ff_lzw_encode_state_size);
-    s->buf = av_malloc(avctx->width*avctx->height*2);
-    s->tmpl = av_malloc(avctx->width);
-    if (!s->tmpl || !s->buf || !s->lzw)
-        return AVERROR(ENOMEM);
-
-    if (avpriv_set_systematic_pal2(s->palette, avctx->pix_fmt) < 0)
-        av_assert0(avctx->pix_fmt == AV_PIX_FMT_PAL8);
-
-    return 0;
-}
-
-static int gif_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
-                            const AVFrame *pict, int *got_packet)
-{
-    GIFContext *s = avctx->priv_data;
-    uint8_t *outbuf_ptr, *end;
-    const uint32_t *palette = NULL;
-    int ret;
-
-    if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width*avctx->height*7/5 + FF_MIN_BUFFER_SIZE)) < 0)
-        return ret;
-    outbuf_ptr = pkt->data;
-    end        = pkt->data + pkt->size;
-
-    if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
-        uint8_t *pal_exdata = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
-        if (!pal_exdata)
-            return AVERROR(ENOMEM);
-        memcpy(pal_exdata, pict->data[1], AVPALETTE_SIZE);
-        palette = (uint32_t*)pict->data[1];
-    }
-
-    gif_image_write_image(avctx, &outbuf_ptr, end, palette,
-                          pict->data[0], pict->linesize[0], pkt);
-    if (!s->last_frame) {
-        s->last_frame = av_frame_alloc();
-        if (!s->last_frame)
-            return AVERROR(ENOMEM);
-    }
-    av_frame_unref(s->last_frame);
-    ret = av_frame_ref(s->last_frame, (AVFrame*)pict);
-    if (ret < 0)
-        return ret;
-
-    pkt->size   = outbuf_ptr - pkt->data;
-    pkt->flags |= AV_PKT_FLAG_KEY;
-    *got_packet = 1;
-
-    return 0;
-}
-
-static int gif_encode_close(AVCodecContext *avctx)
-{
-    GIFContext *s = avctx->priv_data;
-
-    av_frame_free(&avctx->coded_frame);
-
-    av_freep(&s->lzw);
-    av_freep(&s->buf);
-    av_frame_free(&s->last_frame);
-    av_freep(&s->tmpl);
-    return 0;
-}
-
-#define OFFSET(x) offsetof(GIFContext, x)
-#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
-static const AVOption gif_options[] = {
-    { "gifflags", "set GIF flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = GF_OFFSETTING|GF_TRANSDIFF}, 0, INT_MAX, FLAGS, "flags" },
-        { "offsetting", "enable picture offsetting", 0, AV_OPT_TYPE_CONST, {.i64=GF_OFFSETTING}, INT_MIN, INT_MAX, FLAGS, "flags" },
-        { "transdiff", "enable transparency detection between frames", 0, AV_OPT_TYPE_CONST, {.i64=GF_TRANSDIFF}, INT_MIN, INT_MAX, FLAGS, "flags" },
-    { NULL }
-};
-
-static const AVClass gif_class = {
-    .class_name = "GIF encoder",
-    .item_name  = av_default_item_name,
-    .option     = gif_options,
-    .version    = LIBAVUTIL_VERSION_INT,
-};
-
-AVCodec ff_gif_encoder = {
-    .name           = "gif",
-    .long_name      = NULL_IF_CONFIG_SMALL("GIF (Graphics Interchange Format)"),
-    .type           = AVMEDIA_TYPE_VIDEO,
-    .id             = AV_CODEC_ID_GIF,
-    .priv_data_size = sizeof(GIFContext),
-    .init           = gif_encode_init,
-    .encode2        = gif_encode_frame,
-    .close          = gif_encode_close,
-    .pix_fmts       = (const enum AVPixelFormat[]){
-        AV_PIX_FMT_RGB8, AV_PIX_FMT_BGR8, AV_PIX_FMT_RGB4_BYTE, AV_PIX_FMT_BGR4_BYTE,
-        AV_PIX_FMT_GRAY8, AV_PIX_FMT_PAL8, AV_PIX_FMT_NONE
-    },
-    .priv_class     = &gif_class,
-};