chasing indexing error

1 files changed, 0 insertions, 390 deletions

diff --git a/ffmpeg/libavcodec/h261enc.c b/ffmpeg/libavcodec/h261enc.c
deleted file mode 100644
index e185f5e..0000000
--- a/ffmpeg/libavcodec/h261enc.c
+++ /dev/null
@@ -1,390 +0,0 @@
-/*
- * H261 encoder
- * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
- * Copyright (c) 2004 Maarten Daniels
- *
- * 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
- * H.261 encoder.
- */
-
-#include "libavutil/attributes.h"
-#include "libavutil/avassert.h"
-#include "avcodec.h"
-#include "mpegvideo.h"
-#include "h263.h"
-#include "h261.h"
-
-static uint8_t uni_h261_rl_len [64*64*2*2];
-#define UNI_ENC_INDEX(last,run,level) ((last)*128*64 + (run)*128 + (level))
-
-int ff_h261_get_picture_format(int width, int height)
-{
-    // QCIF
-    if (width == 176 && height == 144)
-        return 0;
-    // CIF
-    else if (width == 352 && height == 288)
-        return 1;
-    // ERROR
-    else
-        return -1;
-}
-
-void ff_h261_encode_picture_header(MpegEncContext *s, int picture_number)
-{
-    H261Context *h = (H261Context *)s;
-    int format, temp_ref;
-
-    avpriv_align_put_bits(&s->pb);
-
-    /* Update the pointer to last GOB */
-    s->ptr_lastgob = put_bits_ptr(&s->pb);
-
-    put_bits(&s->pb, 20, 0x10); /* PSC */
-
-    temp_ref = s->picture_number * (int64_t)30000 * s->avctx->time_base.num /
-               (1001 * (int64_t)s->avctx->time_base.den);   // FIXME maybe this should use a timestamp
-    put_sbits(&s->pb, 5, temp_ref); /* TemporalReference */
-
-    put_bits(&s->pb, 1, 0); /* split screen off */
-    put_bits(&s->pb, 1, 0); /* camera  off */
-    put_bits(&s->pb, 1, 0); /* freeze picture release off */
-
-    format = ff_h261_get_picture_format(s->width, s->height);
-
-    put_bits(&s->pb, 1, format); /* 0 == QCIF, 1 == CIF */
-
-    put_bits(&s->pb, 1, 0); /* still image mode */
-    put_bits(&s->pb, 1, 0); /* reserved */
-
-    put_bits(&s->pb, 1, 0); /* no PEI */
-    if (format == 0)
-        h->gob_number = -1;
-    else
-        h->gob_number = 0;
-    s->mb_skip_run = 0;
-}
-
-/**
- * Encode a group of blocks header.
- */
-static void h261_encode_gob_header(MpegEncContext *s, int mb_line)
-{
-    H261Context *h = (H261Context *)s;
-    if (ff_h261_get_picture_format(s->width, s->height) == 0) {
-        h->gob_number += 2; // QCIF
-    } else {
-        h->gob_number++;    // CIF
-    }
-    put_bits(&s->pb, 16, 1);            /* GBSC */
-    put_bits(&s->pb, 4, h->gob_number); /* GN */
-    put_bits(&s->pb, 5, s->qscale);     /* GQUANT */
-    put_bits(&s->pb, 1, 0);             /* no GEI */
-    s->mb_skip_run = 0;
-    s->last_mv[0][0][0] = 0;
-    s->last_mv[0][0][1] = 0;
-}
-
-void ff_h261_reorder_mb_index(MpegEncContext *s)
-{
-    int index = s->mb_x + s->mb_y * s->mb_width;
-
-    if (index % 11 == 0) {
-        if (index % 33 == 0)
-            h261_encode_gob_header(s, 0);
-        s->last_mv[0][0][0] = 0;
-        s->last_mv[0][0][1] = 0;
-    }
-
-    /* for CIF the GOB's are fragmented in the middle of a scanline
-     * that's why we need to adjust the x and y index of the macroblocks */
-    if (ff_h261_get_picture_format(s->width, s->height) == 1) { // CIF
-        s->mb_x  = index % 11;
-        index   /= 11;
-        s->mb_y  = index % 3;
-        index   /= 3;
-        s->mb_x += 11 * (index % 2);
-        index   /= 2;
-        s->mb_y += 3 * index;
-
-        ff_init_block_index(s);
-        ff_update_block_index(s);
-    }
-}
-
-static void h261_encode_motion(H261Context *h, int val)
-{
-    MpegEncContext *const s = &h->s;
-    int sign, code;
-    if (val == 0) {
-        code = 0;
-        put_bits(&s->pb, ff_h261_mv_tab[code][1], ff_h261_mv_tab[code][0]);
-    } else {
-        if (val > 15)
-            val -= 32;
-        if (val < -16)
-            val += 32;
-        sign = val < 0;
-        code = sign ? -val : val;
-        put_bits(&s->pb, ff_h261_mv_tab[code][1], ff_h261_mv_tab[code][0]);
-        put_bits(&s->pb, 1, sign);
-    }
-}
-
-static inline int get_cbp(MpegEncContext *s, int16_t block[6][64])
-{
-    int i, cbp;
-    cbp = 0;
-    for (i = 0; i < 6; i++)
-        if (s->block_last_index[i] >= 0)
-            cbp |= 1 << (5 - i);
-    return cbp;
-}
-
-/**
- * Encode an 8x8 block.
- * @param block the 8x8 block
- * @param n block index (0-3 are luma, 4-5 are chroma)
- */
-static void h261_encode_block(H261Context *h, int16_t *block, int n)
-{
-    MpegEncContext *const s = &h->s;
-    int level, run, i, j, last_index, last_non_zero, sign, slevel, code;
-    RLTable *rl;
-
-    rl = &ff_h261_rl_tcoeff;
-    if (s->mb_intra) {
-        /* DC coef */
-        level = block[0];
-        /* 255 cannot be represented, so we clamp */
-        if (level > 254) {
-            level    = 254;
-            block[0] = 254;
-        }
-        /* 0 cannot be represented also */
-        else if (level < 1) {
-            level    = 1;
-            block[0] = 1;
-        }
-        if (level == 128)
-            put_bits(&s->pb, 8, 0xff);
-        else
-            put_bits(&s->pb, 8, level);
-        i = 1;
-    } else if ((block[0] == 1 || block[0] == -1) &&
-               (s->block_last_index[n] > -1)) {
-        // special case
-        put_bits(&s->pb, 2, block[0] > 0 ? 2 : 3);
-        i = 1;
-    } else {
-        i = 0;
-    }
-
-    /* AC coefs */
-    last_index    = s->block_last_index[n];
-    last_non_zero = i - 1;
-    for (; i <= last_index; i++) {
-        j     = s->intra_scantable.permutated[i];
-        level = block[j];
-        if (level) {
-            run    = i - last_non_zero - 1;
-            sign   = 0;
-            slevel = level;
-            if (level < 0) {
-                sign  = 1;
-                level = -level;
-            }
-            code = get_rl_index(rl, 0 /*no last in H.261, EOB is used*/,
-                                run, level);
-            if (run == 0 && level < 16)
-                code += 1;
-            put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
-            if (code == rl->n) {
-                put_bits(&s->pb, 6, run);
-                av_assert1(slevel != 0);
-                av_assert1(level <= 127);
-                put_sbits(&s->pb, 8, slevel);
-            } else {
-                put_bits(&s->pb, 1, sign);
-            }
-            last_non_zero = i;
-        }
-    }
-    if (last_index > -1)
-        put_bits(&s->pb, rl->table_vlc[0][1], rl->table_vlc[0][0]); // EOB
-}
-
-void ff_h261_encode_mb(MpegEncContext *s, int16_t block[6][64],
-                       int motion_x, int motion_y)
-{
-    H261Context *h = (H261Context *)s;
-    int mvd, mv_diff_x, mv_diff_y, i, cbp;
-    cbp = 63; // avoid warning
-    mvd = 0;
-
-    h->mtype = 0;
-
-    if (!s->mb_intra) {
-        /* compute cbp */
-        cbp = get_cbp(s, block);
-
-        /* mvd indicates if this block is motion compensated */
-        mvd = motion_x | motion_y;
-
-        if ((cbp | mvd | s->dquant) == 0) {
-            /* skip macroblock */
-            s->skip_count++;
-            s->mb_skip_run++;
-            s->last_mv[0][0][0] = 0;
-            s->last_mv[0][0][1] = 0;
-            return;
-        }
-    }
-
-    /* MB is not skipped, encode MBA */
-    put_bits(&s->pb,
-             ff_h261_mba_bits[s->mb_skip_run],
-             ff_h261_mba_code[s->mb_skip_run]);
-    s->mb_skip_run = 0;
-
-    /* calculate MTYPE */
-    if (!s->mb_intra) {
-        h->mtype++;
-
-        if (mvd || s->loop_filter)
-            h->mtype += 3;
-        if (s->loop_filter)
-            h->mtype += 3;
-        if (cbp || s->dquant)
-            h->mtype++;
-        av_assert1(h->mtype > 1);
-    }
-
-    if (s->dquant)
-        h->mtype++;
-
-    put_bits(&s->pb,
-             ff_h261_mtype_bits[h->mtype],
-             ff_h261_mtype_code[h->mtype]);
-
-    h->mtype = ff_h261_mtype_map[h->mtype];
-
-    if (IS_QUANT(h->mtype)) {
-        ff_set_qscale(s, s->qscale + s->dquant);
-        put_bits(&s->pb, 5, s->qscale);
-    }
-
-    if (IS_16X16(h->mtype)) {
-        mv_diff_x       = (motion_x >> 1) - s->last_mv[0][0][0];
-        mv_diff_y       = (motion_y >> 1) - s->last_mv[0][0][1];
-        s->last_mv[0][0][0] = (motion_x >> 1);
-        s->last_mv[0][0][1] = (motion_y >> 1);
-        h261_encode_motion(h, mv_diff_x);
-        h261_encode_motion(h, mv_diff_y);
-    }
-
-    if (HAS_CBP(h->mtype)) {
-        av_assert1(cbp > 0);
-        put_bits(&s->pb,
-                 ff_h261_cbp_tab[cbp - 1][1],
-                 ff_h261_cbp_tab[cbp - 1][0]);
-    }
-    for (i = 0; i < 6; i++)
-        /* encode each block */
-        h261_encode_block(h, block[i], i);
-
-    if (!IS_16X16(h->mtype)) {
-        s->last_mv[0][0][0] = 0;
-        s->last_mv[0][0][1] = 0;
-    }
-}
-
-static av_cold void init_uni_h261_rl_tab(RLTable *rl, uint32_t *bits_tab,
-                                         uint8_t *len_tab)
-{
-    int slevel, run, last;
-
-    av_assert0(MAX_LEVEL >= 64);
-    av_assert0(MAX_RUN   >= 63);
-
-    for(slevel=-64; slevel<64; slevel++){
-        if(slevel==0) continue;
-        for(run=0; run<64; run++){
-            for(last=0; last<=1; last++){
-                const int index= UNI_ENC_INDEX(last, run, slevel+64);
-                int level= slevel < 0 ? -slevel : slevel;
-                int len, code;
-
-                len_tab[index]= 100;
-
-                /* ESC0 */
-                code= get_rl_index(rl, 0, run, level);
-                len=  rl->table_vlc[code][1] + 1;
-                if(last)
-                    len += 2;
-
-                if(code!=rl->n && len < len_tab[index]){
-                    len_tab [index]= len;
-                }
-                /* ESC */
-                len = rl->table_vlc[rl->n][1];
-                if(last)
-                    len += 2;
-
-                if(len < len_tab[index]){
-                    len_tab [index]= len;
-                }
-            }
-        }
-    }
-}
-
-av_cold void ff_h261_encode_init(MpegEncContext *s)
-{
-    ff_h261_common_init();
-
-    s->min_qcoeff       = -127;
-    s->max_qcoeff       = 127;
-    s->y_dc_scale_table =
-    s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
-    s->ac_esc_length    = 6+6+8;
-
-    init_uni_h261_rl_tab(&ff_h261_rl_tcoeff, NULL, uni_h261_rl_len);
-
-    s->intra_ac_vlc_length      = s->inter_ac_vlc_length      = uni_h261_rl_len;
-    s->intra_ac_vlc_last_length = s->inter_ac_vlc_last_length = uni_h261_rl_len + 128*64;
-}
-
-FF_MPV_GENERIC_CLASS(h261)
-
-AVCodec ff_h261_encoder = {
-    .name           = "h261",
-    .long_name      = NULL_IF_CONFIG_SMALL("H.261"),
-    .type           = AVMEDIA_TYPE_VIDEO,
-    .id             = AV_CODEC_ID_H261,
-    .priv_data_size = sizeof(H261Context),
-    .init           = ff_MPV_encode_init,
-    .encode2        = ff_MPV_encode_picture,
-    .close          = ff_MPV_encode_end,
-    .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
-                                                     AV_PIX_FMT_NONE },
-    .priv_class     = &h261_class,
-};