adding ffmpeg specific version

1 files changed, 288 insertions, 0 deletions

diff --git a/ffmpeg1/libavcodec/rv30.c b/ffmpeg1/libavcodec/rv30.c
new file mode 100644
index 0000000..a99980e
--- /dev/null
+++ b/ffmpeg1/libavcodec/rv30.c
@@ -0,0 +1,288 @@
+/*
+ * RV30 decoder
+ * Copyright (c) 2007 Konstantin Shishkov
+ *
+ * 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
+ * RV30 decoder
+ */
+
+#include "avcodec.h"
+#include "mpegvideo.h"
+#include "golomb.h"
+
+#include "rv34.h"
+#include "rv30data.h"
+
+
+static int rv30_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si)
+{
+    int mb_bits;
+    int w = r->s.width, h = r->s.height;
+    int mb_size;
+    int rpr;
+
+    memset(si, 0, sizeof(SliceInfo));
+    if(get_bits(gb, 3))
+        return -1;
+    si->type = get_bits(gb, 2);
+    if(si->type == 1) si->type = 0;
+    if(get_bits1(gb))
+        return -1;
+    si->quant = get_bits(gb, 5);
+    skip_bits1(gb);
+    si->pts = get_bits(gb, 13);
+    rpr = get_bits(gb, r->rpr);
+    if (r->s.avctx->extradata_size < 8 + rpr*2) {
+        av_log(r->s.avctx, AV_LOG_WARNING,
+               "Extradata does not contain selected resolution\n");
+        rpr = 0;
+    }
+    if(rpr){
+        w = r->s.avctx->extradata[6 + rpr*2] << 2;
+        h = r->s.avctx->extradata[7 + rpr*2] << 2;
+    }
+    si->width  = w;
+    si->height = h;
+    mb_size = ((w + 15) >> 4) * ((h + 15) >> 4);
+    mb_bits = ff_rv34_get_start_offset(gb, mb_size);
+    si->start = get_bits(gb, mb_bits);
+    skip_bits1(gb);
+    return 0;
+}
+
+/**
+ * Decode 4x4 intra types array.
+ */
+static int rv30_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t *dst)
+{
+    int i, j, k;
+
+    for(i = 0; i < 4; i++, dst += r->intra_types_stride - 4){
+        for(j = 0; j < 4; j+= 2){
+            unsigned code = svq3_get_ue_golomb(gb) << 1;
+            if (code > 80U*2U) {
+                av_log(r->s.avctx, AV_LOG_ERROR, "Incorrect intra prediction code\n");
+                return -1;
+            }
+            for(k = 0; k < 2; k++){
+                int A = dst[-r->intra_types_stride] + 1;
+                int B = dst[-1] + 1;
+                *dst++ = rv30_itype_from_context[A * 90 + B * 9 + rv30_itype_code[code + k]];
+                if(dst[-1] == 9){
+                    av_log(r->s.avctx, AV_LOG_ERROR, "Incorrect intra prediction mode\n");
+                    return -1;
+                }
+            }
+        }
+    }
+    return 0;
+}
+
+/**
+ * Decode macroblock information.
+ */
+static int rv30_decode_mb_info(RV34DecContext *r)
+{
+    static const int rv30_p_types[6] = { RV34_MB_SKIP, RV34_MB_P_16x16, RV34_MB_P_8x8, -1, RV34_MB_TYPE_INTRA, RV34_MB_TYPE_INTRA16x16 };
+    static const int rv30_b_types[6] = { RV34_MB_SKIP, RV34_MB_B_DIRECT, RV34_MB_B_FORWARD, RV34_MB_B_BACKWARD, RV34_MB_TYPE_INTRA, RV34_MB_TYPE_INTRA16x16 };
+    MpegEncContext *s = &r->s;
+    GetBitContext *gb = &s->gb;
+    unsigned code     = svq3_get_ue_golomb(gb);
+
+    if (code > 11) {
+        av_log(s->avctx, AV_LOG_ERROR, "Incorrect MB type code\n");
+        return -1;
+    }
+    if(code > 5){
+        av_log(s->avctx, AV_LOG_ERROR, "dquant needed\n");
+        code -= 6;
+    }
+    if(s->pict_type != AV_PICTURE_TYPE_B)
+        return rv30_p_types[code];
+    else
+        return rv30_b_types[code];
+}
+
+static inline void rv30_weak_loop_filter(uint8_t *src, const int step,
+                                         const int stride, const int lim)
+{
+    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+    int i, diff;
+
+    for(i = 0; i < 4; i++){
+        diff = ((src[-2*step] - src[1*step]) - (src[-1*step] - src[0*step])*4) >> 3;
+        diff = av_clip(diff, -lim, lim);
+        src[-1*step] = cm[src[-1*step] + diff];
+        src[ 0*step] = cm[src[ 0*step] - diff];
+        src += stride;
+    }
+}
+
+static void rv30_loop_filter(RV34DecContext *r, int row)
+{
+    MpegEncContext *s = &r->s;
+    int mb_pos, mb_x;
+    int i, j, k;
+    uint8_t *Y, *C;
+    int loc_lim, cur_lim, left_lim = 0, top_lim = 0;
+
+    mb_pos = row * s->mb_stride;
+    for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
+        int mbtype = s->current_picture_ptr->mb_type[mb_pos];
+        if(IS_INTRA(mbtype) || IS_SEPARATE_DC(mbtype))
+            r->deblock_coefs[mb_pos] = 0xFFFF;
+        if(IS_INTRA(mbtype))
+            r->cbp_chroma[mb_pos] = 0xFF;
+    }
+
+    /* all vertical edges are filtered first
+     * and horizontal edges are filtered on the next iteration
+     */
+    mb_pos = row * s->mb_stride;
+    for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
+        cur_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos]];
+        if(mb_x)
+            left_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos - 1]];
+        for(j = 0; j < 16; j += 4){
+            Y = s->current_picture_ptr->f.data[0] + mb_x*16 + (row*16 + j) * s->linesize + 4 * !mb_x;
+            for(i = !mb_x; i < 4; i++, Y += 4){
+                int ij = i + j;
+                loc_lim = 0;
+                if(r->deblock_coefs[mb_pos] & (1 << ij))
+                    loc_lim = cur_lim;
+                else if(!i && r->deblock_coefs[mb_pos - 1] & (1 << (ij + 3)))
+                    loc_lim = left_lim;
+                else if( i && r->deblock_coefs[mb_pos]     & (1 << (ij - 1)))
+                    loc_lim = cur_lim;
+                if(loc_lim)
+                    rv30_weak_loop_filter(Y, 1, s->linesize, loc_lim);
+            }
+        }
+        for(k = 0; k < 2; k++){
+            int cur_cbp, left_cbp = 0;
+            cur_cbp = (r->cbp_chroma[mb_pos] >> (k*4)) & 0xF;
+            if(mb_x)
+                left_cbp = (r->cbp_chroma[mb_pos - 1] >> (k*4)) & 0xF;
+            for(j = 0; j < 8; j += 4){
+                C = s->current_picture_ptr->f.data[k + 1] + mb_x*8 + (row*8 + j) * s->uvlinesize + 4 * !mb_x;
+                for(i = !mb_x; i < 2; i++, C += 4){
+                    int ij = i + (j >> 1);
+                    loc_lim = 0;
+                    if (cur_cbp & (1 << ij))
+                        loc_lim = cur_lim;
+                    else if(!i && left_cbp & (1 << (ij + 1)))
+                        loc_lim = left_lim;
+                    else if( i && cur_cbp  & (1 << (ij - 1)))
+                        loc_lim = cur_lim;
+                    if(loc_lim)
+                        rv30_weak_loop_filter(C, 1, s->uvlinesize, loc_lim);
+                }
+            }
+        }
+    }
+    mb_pos = row * s->mb_stride;
+    for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
+        cur_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos]];
+        if(row)
+            top_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos - s->mb_stride]];
+        for(j = 4*!row; j < 16; j += 4){
+            Y = s->current_picture_ptr->f.data[0] + mb_x*16 + (row*16 + j) * s->linesize;
+            for(i = 0; i < 4; i++, Y += 4){
+                int ij = i + j;
+                loc_lim = 0;
+                if(r->deblock_coefs[mb_pos] & (1 << ij))
+                    loc_lim = cur_lim;
+                else if(!j && r->deblock_coefs[mb_pos - s->mb_stride] & (1 << (ij + 12)))
+                    loc_lim = top_lim;
+                else if( j && r->deblock_coefs[mb_pos]                & (1 << (ij - 4)))
+                    loc_lim = cur_lim;
+                if(loc_lim)
+                    rv30_weak_loop_filter(Y, s->linesize, 1, loc_lim);
+            }
+        }
+        for(k = 0; k < 2; k++){
+            int cur_cbp, top_cbp = 0;
+            cur_cbp = (r->cbp_chroma[mb_pos] >> (k*4)) & 0xF;
+            if(row)
+                top_cbp = (r->cbp_chroma[mb_pos - s->mb_stride] >> (k*4)) & 0xF;
+            for(j = 4*!row; j < 8; j += 4){
+                C = s->current_picture_ptr->f.data[k+1] + mb_x*8 + (row*8 + j) * s->uvlinesize;
+                for(i = 0; i < 2; i++, C += 4){
+                    int ij = i + (j >> 1);
+                    loc_lim = 0;
+                    if (r->cbp_chroma[mb_pos] & (1 << ij))
+                        loc_lim = cur_lim;
+                    else if(!j && top_cbp & (1 << (ij + 2)))
+                        loc_lim = top_lim;
+                    else if( j && cur_cbp & (1 << (ij - 2)))
+                        loc_lim = cur_lim;
+                    if(loc_lim)
+                        rv30_weak_loop_filter(C, s->uvlinesize, 1, loc_lim);
+                }
+            }
+        }
+    }
+}
+
+/**
+ * Initialize decoder.
+ */
+static av_cold int rv30_decode_init(AVCodecContext *avctx)
+{
+    RV34DecContext *r = avctx->priv_data;
+
+    r->rv30 = 1;
+    ff_rv34_decode_init(avctx);
+    if(avctx->extradata_size < 2){
+        av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
+        return -1;
+    }
+    r->rpr = (avctx->extradata[1] & 7) >> 1;
+    r->rpr = FFMIN(r->rpr + 1, 3);
+    if(avctx->extradata_size - 8 < (r->rpr - 1) * 2){
+        av_log(avctx, AV_LOG_ERROR, "Insufficient extradata - need at least %d bytes, got %d\n",
+               6 + r->rpr * 2, avctx->extradata_size);
+    }
+    r->parse_slice_header = rv30_parse_slice_header;
+    r->decode_intra_types = rv30_decode_intra_types;
+    r->decode_mb_info     = rv30_decode_mb_info;
+    r->loop_filter        = rv30_loop_filter;
+    r->luma_dc_quant_i = rv30_luma_dc_quant;
+    r->luma_dc_quant_p = rv30_luma_dc_quant;
+    return 0;
+}
+
+AVCodec ff_rv30_decoder = {
+    .name                  = "rv30",
+    .type                  = AVMEDIA_TYPE_VIDEO,
+    .id                    = AV_CODEC_ID_RV30,
+    .priv_data_size        = sizeof(RV34DecContext),
+    .init                  = rv30_decode_init,
+    .close                 = ff_rv34_decode_end,
+    .decode                = ff_rv34_decode_frame,
+    .capabilities          = CODEC_CAP_DR1 | CODEC_CAP_DELAY |
+                             CODEC_CAP_FRAME_THREADS,
+    .flush                 = ff_mpeg_flush,
+    .long_name             = NULL_IF_CONFIG_SMALL("RealVideo 3.0"),
+    .pix_fmts              = ff_pixfmt_list_420,
+    .init_thread_copy      = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_init_thread_copy),
+    .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_update_thread_context),
+};